JP2007331042A - Deep hole machining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deep hole machining device for machining a deep hole in a workpiece, which prevents a gap between a machined section of the workpiece and a machining tool from being clogged with cutting chips and smoothly machines the deep hole. <P>SOLUTION: The deep hole machining device has: a mist feeding passage 85 for feeding mist generated by mixing gas with lubricating oil, to a contact portion between the machined section of the workpiece 100 and the machining tool; and a gas feeding passage 82 for feeding the gas to the mist feeding passage. Thus, the mist in the mist feeding passage 85 is positively delivered to the contact portion between the machined section of the workpiece and the machining tool, by the gas fed from the gas feeding passage 82. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a deep hole machining apparatus capable of machining a deep hole in a workpiece by a processing tool that is rotationally driven. More specifically, the present invention relates to a deep hole machining apparatus that forms a deep hole in a workpiece by rotating a spindle to which a machining tool is attached toward a workpiece machining portion.

  2. Description of the Related Art Conventionally, there is known a deep hole processing apparatus that supplies a mist generated from a cutting fluid and gas to a cutting edge portion of a processing tool when a hole having a predetermined depth is processed in a workpiece.

  In this type of deep hole machining apparatus, for example, the gas supplied from the gas path and the cutting oil supplied from the cutting oil path are mixed by a mist generating device provided in the tip of the spindle or in the tool holder. There is a technique in which the mist is generated and injected from the vicinity of the cutting blade through the passage of the blade (Patent Document 1).

  Machining that supplies lubricating oil mist misted by compressed air to a machining machine that performs predetermined machining on the workpiece by moving the machining axis attached with the machining tool toward the machining part of the workpiece A lubricating oil mist supply device for a machine having a cylinder attached to the machining machine and a piston sliding in the cylinder, and compressing air in accordance with a sliding operation of the piston Means, linkage means for driving the piston linked to the movement of the machining shaft, lubricating oil supply means for supplying lubricating oil toward at least the machining portion of the workpiece, and lubricating oil from the lubricating oil supply means And a spray supplying means for supplying the lubricating oil mist from the outside of the work toward the work portion of the work. Patent Document 2).

JP-A-9-66437 JP 2004-58229 A

  However, in the conventional technique described in Patent Document 1, the structure is complicated because the mist generating means is provided in the tip portion of the main shaft or in the tool holder, and as the deep hole is further processed, the tip of the cutter is advanced. When chips accumulate in the vicinity (near the cutting edge), there is a problem that it becomes difficult to process a deep hole due to friction between the chip and the tip of the blade.

  Further, in the conventional technique described in Patent Document 2, there is a problem that the lubricating oil does not reach the tip of the blade and it is difficult to process a deep hole due to friction between the blade tip and the chips.

  Furthermore, in any of the conventional techniques, there is a problem that chips are accumulated near the tip of the blade (near the cutting edge), and frictional resistance acts on the processing tool to cause damage to the processing tool.

  In order to solve the above problems, the present invention provides a mist generating means (for example, mist generating means 86) that generates a mist by mixing gas (for example, compressed air) and lubricating oil, and generated by the mist generating means. A mist supply path (for example, mist supply path 85) that supplies the mist thus produced to the contact portion between the workpiece processing part and the processing tool, and a gas supply path (for example, gas supply path 82) that supplies gas to the mist supply path. Etc.).

  As a result, gas is supplied from the gas supply path to the mist supply path, and the mist in the mist supply path can be reliably sent out to the contact portion between the workpiece processing part and the processing tool by the gas. The deep hole drilling device can be configured with a simple structure without the need to be provided near the tip of the tool, and the mist (including lubricating oil) can be reliably delivered to the tip of the tool. There is no difficulty in processing deep holes due to friction between the tip and the workpiece.

  Also, a clogging judgment value (for example, a flow rate value L, a pressure value M, a rotational torque Q, a temperature N, an added value, etc.) for judging whether chips generated during deep hole formation are clogged between the work tool and the workpiece. Clogging determination value measuring means (for example, a flow meter 89, a pressure gauge 88, a rotational torque detection sensor (not shown), a temperature sensor (not shown), a work tool temperature sensor (not shown) that measures a tool temperature DN, a chip temperature KN, and the like. (Not shown), a chip temperature sensor (not shown), and the clogging judgment value measured by the clogging judgment value measuring means are preset threshold values (for example, clogging flow value X, clogging pressure value P). Clogging torque K, clogging temperature T, clogging tool temperature DT, clogging chip temperature KT, etc.), and clogging judgment means (for example, control device 99). By means of clogging Control means (for example, control device) that controls to increase the flow rate of the gas flowing through the gas supply path when it is determined that the clogging determination value measured by the value measuring means has reached a preset threshold value 99), and the like.

  Thereby, when it is determined that the clogging determination value measured by the clogging determination value measuring means has reached a preset threshold value, the flow rate of the gas flowing through the gas supply path is increased. Even when chips generated during processing are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  Further, a flow rate measuring unit (for example, a flow meter 89) that measures the flow rate of the gas flowing through the gas supply path, and a threshold value in which a flow rate value (for example, a flow rate value L) measured by the flow rate measuring unit is set in advance. A flow rate determining means (for example, the control device 99) that determines whether the flow rate is less than or equal to (for example, a clogged flow rate value X) and the flow rate value measured by the flow rate measuring means is preset by the flow rate determining means. Control means (for example, control device 99 or the like) that controls to increase the flow rate of the gas flowing through the gas supply path when it is determined that it is equal to or less than a threshold value (for example, clogging flow rate value X or the like). It is characterized by this.

  Accordingly, when it is determined that the flow rate value measured by the flow rate measuring unit is equal to or less than a preset threshold value, the flow rate of the gas flowing through the gas supply path is controlled to be increased. Even when the generated chips are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  The apparatus further includes flow rate adjusting means (for example, a solenoid valve 92, a flow rate control device (not shown), etc.) for adjusting the flow rate of the gas flowing through the gas supply path (for example, the gas supply path 82). When it is determined that the flow rate value (for example, the flow rate value L) measured by the measuring unit is equal to or less than a preset threshold value (for example, the clogging flow rate value X), the gas supply path (for example, gas supply) The flow rate adjusting means is controlled so as to increase the flow rate of the gas flowing through the passage 82 or the like to a preset flow rate value.

  As a result, the flow rate adjusting means is configured to increase the flow rate of the gas flowing through the gas supply path to a preset flow rate value when it is determined that the flow rate value measured by the flow rate measuring means is equal to or less than a preset threshold value. Therefore, it is possible to set the gas flow rate of the gas supply path to be increased to an arbitrary flow rate value when chips generated during deep hole formation are clogged between the work tool and the workpiece. Chip clogging between the tool and the workpiece can be reliably eliminated.

  Further, a pressure measuring means (for example, a pressure gauge 88) for measuring the pressure of the gas flowing through the gas supply path, and a threshold value (for example, a pressure value M) measured by the pressure measuring means are set in advance ( For example, a pressure determination unit (for example, the control device 99) that determines whether the pressure value is equal to or higher than a clogging pressure value P, and a threshold value by which the pressure value measured by the pressure measurement unit by the pressure determination unit is set in advance. Control means (for example, control device 99) that controls to increase the flow rate of the gas flowing through the gas supply path when it is determined that the pressure is greater than or equal to (for example, clogging pressure value P). It is characterized by.

  Thereby, when it is determined that the pressure value measured by the pressure measuring means is equal to or greater than a preset threshold value, control is performed to increase the flow rate of the gas flowing through the gas supply path. Even when the generated chips are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  Further, the apparatus further includes pressure adjusting means (for example, a solenoid valve 92, a pressure control device 87, etc.) for adjusting the pressure of the gas flowing through the gas supply path (for example, the gas supply path 82), and the control means measures the pressure. When it is determined that the pressure value (for example, pressure value M) measured by the means is greater than or equal to a preset threshold value (for example, clogging pressure value P), the gas supply path (for example, gas supply path) 82) and the like, and the pressure adjusting means is controlled so as to increase the pressure of the gas flowing through the gas to a preset pressure value.

  Thereby, when it is determined that the pressure value measured by the pressure measuring means is equal to or greater than a preset threshold value, the pressure adjusting means is configured to increase the pressure of the gas flowing through the gas supply path to a preset pressure value. Therefore, it is possible to set the gas pressure in the gas supply path to be increased to an arbitrary pressure value when chips generated during deep hole formation are clogged between the work tool and the workpiece. Chip clogging between the tool and the workpiece can be reliably eliminated.

  Also, a main shaft rotating means for rotating the main shaft (for example, main shaft rotation driving unit 33), a driving force measuring means for measuring the driving force of the main shaft rotating means (for example, a rotational torque detection sensor (not shown)), Driving force determining means (for example, for determining whether the driving force value (for example, rotational torque Q) measured by the driving force measuring means is equal to or greater than a preset threshold value (for example, clogging torque K). The control device 99 and the driving force determination means determine that the value of the driving force measured by the driving force measurement means is greater than or equal to a preset threshold (for example, clogging torque K or the like). And control means (for example, the control device 99) for controlling the flow rate of the gas flowing through the gas supply path to be increased.

  Thereby, when it is determined that the value of the driving force measured by the driving force measuring means is greater than or equal to a preset threshold value, control is performed so as to increase the flow rate of the gas flowing through the gas supply path. Even when chips generated during machining are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  Also, a workpiece temperature measuring means (for example, a temperature sensor (not shown) or the like) for measuring the workpiece temperature, and a workpiece temperature value (for example, temperature N) measured by the workpiece temperature measuring means are preset. The workpiece temperature determining means (for example, the control device 99) for determining whether the temperature is equal to or higher than the threshold value (for example, the clogging temperature T), and the workpiece temperature measured by the workpiece temperature measuring means by the workpiece temperature determining means. Is determined to be higher than a preset threshold value (for example, clogging temperature T), for example, control means (for example, control device 99) for controlling the flow rate of the gas flowing through the gas supply path to be increased. It is characterized by having.

  Thereby, when it is determined that the temperature of the workpiece measured by the workpiece temperature measuring means is equal to or higher than a preset threshold value, control is performed so as to increase the flow rate of the gas flowing through the gas supply path. Even when chips generated during machining are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  Further, a processing tool temperature measuring means (for example, a processing tool temperature sensor (not shown)) for measuring the temperature of the processing tool, and a processing tool temperature (for example, a processing tool temperature DN) measured by the processing tool temperature measuring means. ) Is higher than a preset threshold value (for example, clogging tool temperature DT) by a processing tool temperature determination means (for example, control device 99) and a processing tool temperature determination means. When it is determined that the temperature of the workpiece measured by the tool temperature measuring unit is equal to or higher than a preset threshold value (for example, clogging tool temperature DT), a gas supply path (for example, gas supply path 82) Control means (for example, the control device 99 or the like) for controlling the flow rate of the gas flowing through the control device to be increased.

  As a result, when it is determined that the temperature of the processing tool measured by the processing tool temperature measuring means is equal to or higher than a preset threshold, control is performed to increase the flow rate of the gas flowing through the gas supply path. Even when chips generated during hole formation are clogged between the processing tool and the workpiece, the clogging of the chip between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path with the increased flow rate. it can.

  Further, a chip temperature measuring means (for example, a chip temperature sensor (not shown) or the like) for measuring the temperature of chips generated during the deep hole forming process, and a chip temperature (for example, a chip measured by the chip temperature measuring means). The chip temperature determination means (for example, the control device 99 or the like) for determining whether the temperature KN or the like is equal to or higher than a preset threshold (for example, clogging chip temperature KT), and the chip temperature determination means. When it is determined that the chip temperature measured by the measuring unit is equal to or higher than a predetermined threshold (for example, clogging chip temperature KT), control is performed to increase the flow rate of the gas flowing through the gas supply path. And control means (for example, the control device 99).

  Accordingly, when it is determined that the chip temperature measured by the chip temperature measuring means is equal to or higher than a preset threshold value, control is performed so as to increase the flow rate of the gas flowing through the gas supply path. Even when chips generated during machining are clogged between the processing tool and the workpiece, the clogging of the chips between the processing tool and the workpiece can be reliably eliminated by the gas in the gas supply path whose flow rate is increased.

  Further, a flow rate measuring means (for example, a flow meter 89) for measuring the flow rate of the gas flowing through the gas supply path (for example, the gas supply path 82) and a flow rate adjusting means (for example, a flow meter 89) for adjusting the flow rate of the gas flowing through the gas supply path. For example, a solenoid valve 92, a flow rate control device (not shown), etc.), and the control means (for example, the control device 99) increases the flow rate of the gas flowing through the gas supply path to a preset flow rate value. The flow rate adjusting means is controlled so as to make it happen.

  As a result, the flow rate adjusting means is controlled so as to increase the flow rate of the gas flowing through the gas supply path to a preset flow rate value, so that chips generated during deep hole formation are clogged between the processing tool and the workpiece. In this case, the flow rate of the gas in the gas supply path to be increased can be set to an arbitrary flow rate value, so that clogging of chips between the processing tool and the workpiece can be surely eliminated.

  Further, a pressure measuring means (for example, a pressure gauge 88) for measuring the pressure of the gas flowing through the gas supply path (for example, the gas supply path 82), and a pressure adjusting means (for adjusting the pressure of the gas flowing through the gas supply path). For example, a solenoid valve 92, a pressure control device 87, and the like), and the control means (for example, the control device 99) increases the pressure of the gas flowing through the gas supply path to a preset pressure value. The pressure adjusting means is controlled.

  As a result, the pressure adjusting means is controlled so as to increase the pressure of the gas flowing through the gas supply path to a preset pressure value, so that chips generated during deep hole formation are clogged between the processing tool and the workpiece. In this case, the gas pressure in the gas supply path to be increased can be set to an arbitrary pressure value, and thus clogging of chips between the processing tool and the workpiece can be surely eliminated.

  And a recovery path that recovers the lubricating oil that constitutes the mist supplied from the chips and the mist supply path generated during the deep hole forming process, and the mist supply path is provided inside the main shaft, and the recovery path Is provided on the outer peripheral surface of the main shaft.

  In addition, there is a recovery path (for example, a chip discharge passage 27a) that recovers the lubricating oil that constitutes the mist supplied during processing of the deep hole formation and the mist supplied from the mist supply path. It is provided inside the main shaft.

  Moreover, the mist supply path (for example, mist supply path 85 etc.) is provided on the outer peripheral surface of the main shaft.

  The mist supply path (for example, mist supply path 85) communicates with the external mist supply path from the mist generating means to the vicinity of the main shaft and the external mist supply path, and the outlet of the external mist supply path (for example, external mist supply) The mist generated by the mist generating means is connected to the internal mist supply path from the outlet of the external mist supply path to the internal mist supply path. It is characterized in that it is supplied while being inclined in the direction of movement toward the processed portion.

  As a result, the mist generated by the mist generating means is supplied from the outlet of the external mist supply path to the internal mist supply path while being inclined in the direction in which the main shaft moves toward the workpiece processing part. It becomes easier to guide by the contact portion between the workpiece processing portion and the drill, and the flow of mist supply can be further enhanced.

  The mist supply path communicates with the external mist supply path from the mist generating means to the vicinity of the main shaft and the external mist supply path, and is attached to the main shaft from the outlet of the external mist supply path (for example, the external mist supply path outlet 57). The mist generated by the mist generating means is supplied eccentrically from the outlet of the external mist supply path along the rotational direction of the main shaft to the internal mist supply path. It is characterized by that.

  As a result, the mist generated by the mist generating means is supplied eccentrically from the outlet of the external mist supply path to the internal mist supply path along the rotation direction of the main shaft. It becomes easier to guide by the contact portion with the mist, and the flow of mist supply can be further enhanced.

  The present invention comprises a mist generating means for mixing gas and lubricating oil to generate mist, a mist supply path for supplying the mist generated by the mist generating means to a contact portion between a workpiece processing part and a processing tool, By having a gas supply path that supplies gas to the mist supply path, the mist in the mist supply path can be reliably sent to the contact portion between the workpiece processing part and the processing tool by the gas supplied from the gas supply path. Therefore, the deep hole machining apparatus can be configured with a simple structure without the need for providing the mist generating means in the vicinity of the tip of the main shaft, and the mist (including lubricating oil) is reliably delivered to the tip of the processing tool. Therefore, it is not difficult to process a deep hole due to friction between the tip of the processing tool and the workpiece.

  Hereinafter, an embodiment of a deep hole machining apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of a deep hole machining apparatus according to an embodiment of the present invention. FIG. 2 is a top view of the deep hole machining apparatus according to one embodiment of the present invention. In the present embodiment, a case where a hollow roll shell used in the induction heating apparatus is a workpiece 100 and several dozen deep holes are machined in a direction parallel to the axial direction of the workpiece 100 (thick circular tube) will be described. To do.

  The deep hole machining apparatus 1 shown in FIGS. 1 and 2 includes a base 3, a machining unit support member 4 provided on the top of the base 3, and a machining unit 5 provided on the top of the machining unit support member 4. The flow rate control panel 81 is provided.

  First, the base 3 will be described. The base 3 is provided on an upper portion of the floor surface 2 and the like, and becomes a base of the deep hole processing apparatus 1. The processing unit support member 4 and the processing unit 5 described above are supported by the base 3. The base 3 is provided with a Z-axis direction moving means 6 that allows the machining unit support member 4 and the machining unit 5 to move in the Z-axis direction shown in FIG. It has been. The Z-axis direction moving means 6 includes a female screw cylinder (not shown) provided at the lower portion of the base 3 and formed with a female screw, and a Z-axis direction moving rotating body 7 formed with a male screw screwed to the female screw. By rotating the Z-axis direction moving rotator 7, the processing unit support member 4 and the processing unit 5 move in the Z-axis direction via the base 3.

  Next, the processing unit support member 4 will be described. The processing unit support member 4 is disposed above the base 3 to support the processing unit 5 and to move the processing unit 5 in the X-axis direction shown in FIG. 1 and the Y-axis direction. Y-axis direction moving means 9 is provided.

  The Y-axis direction moving means 9 is capable of moving the machining unit 5 in the Y-axis direction (see FIG. 1) substantially orthogonal to the X-axis direction and the Z-axis direction. A rotating shaft 11, a pinion 12, and a rack 13 are provided.

  The rotary handle 10 rotates the rotary shaft 11 by being manually rotated. Since the rotary handle 10 is connected to the rotary shaft 11, the rotation of the rotary handle 10 can be transmitted to the rotary shaft 11 by rotating the rotary handle 10. In this embodiment, the rotary handle 10 is manually rotated, and the rotary shaft 11 is rotated by the rotation. However, the present invention is not limited to this, and a rotary shaft drive motor (not shown) is used instead of the rotary handle 10. The rotating shaft 11 may be rotated. In this embodiment, the rotation shaft 11 is rotated at the same rotation speed as the rotation handle 10. However, the present invention is not limited to this, and an irregular gear (not shown) is provided to rotate the rotation handle 10. The rotational speed of the rotary shaft 11 may be varied.

  As shown in FIG. 1, the rotating shaft 11 is supported by a rotating shaft support member 14a and a bearing 14b.

  The rotary shaft support member 14a uses a radial bearing, has a hollow portion having the same diameter as the rotary shaft 11, and supports the rotary shaft 11 by inserting the rotary shaft 11 into the hollow portion. The rotating shaft support member 14a supports the rotating shaft 11, and a stopper 14c is provided so that the relative position of the rotating shaft 11 and the rotating shaft support member 14a in the X-axis direction does not change. The bearing 14 b is provided in the vicinity of the rotary handle 10, has a hollow portion having substantially the same diameter as the rotary shaft 11, and supports the rotary shaft 11 by inserting the rotary shaft 11 into the hollow portion. . The rotary shaft support member 14a and the bearing 14b are both fixed to the processing unit support member 4, and the centers of the hollow portions of the rotary shaft support member 14a and the bearing 14b are substantially coincident with the axis of the rotary shaft 11. Is installed.

  The pinion 12 (gear) has a tooth shape on the outer periphery, and has a hollow portion through which the rotating shaft 11 is inserted at the center. Since the rotating shaft 11 is fixed by the hollow portion of the pinion 12, the rotation of the rotating handle 10 can be transmitted to the pinion 12 through the rotating shaft 11 by rotating the rotating handle 10. The rack 13 has a planar shape on which the teeth that mesh with the teeth provided on the outer periphery of the pinion 12 are formed, and converts the rotational movement of the pinion 12 into a linear movement in the Y-axis direction. That is, when the rotary handle 10 is rotated, the pinion 12 fixed to the rotating shaft 11 rotates, and the teeth provided on the outer periphery of the pinion 12 mesh with the teeth provided on the planar rack 13. Thus, the rotational motion of the pinion 12 is converted into a linear motion in the Y-axis direction. Thereby, the processing unit 5 can be moved in the Y-axis direction.

  The X-axis direction moving means 8 is capable of moving a drive unit 28 of a machining unit, which will be described later, in the X-axis direction (see FIG. 1) substantially orthogonal to the Z-axis direction. A portion 21 (motor), a ball screw 23, and a displacement member 24 (ball screw nut) are provided. The processing unit drive section 28 includes a main body section 32, a main shaft rotation drive section 33 (motor), and a power transmission belt 34. Details will be described later in the processing unit 5.

  The X-axis direction movement drive unit 21 drives the drive shaft of the X-axis direction movement drive unit 21 to rotate by an electric current. The X-axis direction movement drive unit 21 is enclosed by a casing 20, and the drive shaft of the X-axis direction movement drive unit 21 is connected to a ball screw 23 through a coupling 22 inside the casing 20.

  The displacement member 24 is engaged with the ball screw 23 at a hollow portion through which the ball screw 23 is inserted, and moves the drive unit 28 of the processing unit in the X-axis direction via the ball screw 23. The drive unit 28 of the machining unit moves when the drive unit slider 29 provided at the lower portion of the drive unit 28 of the machining unit slides on the machining unit guide rail 30 provided at the upper portion of the machining unit support member 4. To do.

  With the configuration described above, the current is supplied to the X-axis direction movement drive unit 21 to rotate the ball screw 23 connected to the drive shaft, and the displacement member screwed into the ball screw 23 via the ball screw 23. 24 moves in the X-axis direction. Thereby, the drive unit 28 of the machining unit fixed to the displacement member 24 moves in the X-axis direction along the machining unit guide rail 30. In addition, by changing the rotation direction of the drive shaft of the X-axis direction moving drive unit 21, the drive unit 28 of the machining unit can be moved in the X-axis direction positive direction or negative direction shown in FIG.

  As shown in FIGS. 1 and 2, the ball screw 23 extends over a range in which the drive unit 28 of the machining unit can move in the X-axis direction. A ball screw bearing 25 that supports the ball screw 23 is provided at the end of the ball screw 23. A bearing 26 for supporting the ball screw 23 is provided on the surface where the casing 20 and the processing unit support member 4 are fixed.

  As described above, according to the shape of the workpiece 100 held by the workpiece holder 101 and the position of the workpiece 100 where deep hole machining is performed by the X-axis direction moving means 8 and the Y-axis direction moving means 9, the machining unit 5. (Including the drive unit 28 of the machining unit) can be freely moved on the XY plane. Note that, below the processing unit support member 4, a guide member 15 that performs guidance when the processing unit support member 4 moves on the base 3 (Y-axis direction), and the base 3 and the processing unit support member 4. X-axis direction movement restricting means 16 is provided for restricting the movement of the processing unit support member 4 in the X-axis direction so that the relative position in the X-axis direction is substantially constant.

  The guide member 15 is provided with a guide rail 15b provided at the upper portion of the base 3, and a lower portion of the processing unit support member 4, and a plurality of rotating bodies (not shown) such as rollers are provided at portions in contact with the guide rail 15b. And the slider portion 15a. The slider portion 15a provided with the rotating body (not shown) slides on the guide rail 15b provided on the upper portion of the base 3 in the Y-axis direction. Thus, the processing unit support member 4 can move smoothly with respect to the base 3 in the Y-axis direction. The guide rail 15b has a shape extending in the Y-axis direction as shown in FIG.

  The X-axis direction movement restricting means 16 is provided on the lower end of the slider part 16b, provided on the upper part of the base 3 and the slider part 16b having a projecting portion at the lower end of the X-axis direction movement restricting means 16. And a guide rail 16a provided with a convex groove that engages with the convex protrusion. Then, when the machining unit 5 is moved in the Y-axis direction by the Y-axis direction moving means 9 described above, a convex-shaped projection formed on the guide rail 16a is formed on the guide rail 16a. Therefore, the machining unit 5 can be moved in the Y-axis direction while keeping the relative position of the base 3 and the machining unit support member 4 in the X-axis direction constant. The guide rail 16a has a shape extending in the Y-axis direction as shown in FIG. As shown in FIG. 1, the pinion 12 and rack 13 of the Y-axis direction moving means 9, the guide rail 15 b and slider part 15 a of the guide member 15, and the guide rail 16 a and slider part 16 b of the X-axis direction movement restricting means 16 are The deep hole processing apparatus 1 is provided on the left and right sides.

  Next, the processing unit 5 will be described. The machining unit 5 is provided on the upper part of the machining unit support member 4 and includes a main shaft 27 (boring bar), a machining unit drive unit 28, and a pressure head 31.

  The spindle 27 is connected to a drill (a drilling tool), which will be described later, for performing deep hole machining on the workpiece 100 at the tip. The main shaft 27 is guided by a guide member 37 along the axial direction of the drill. The guide member 37 is provided with an insertion hole through which the main shaft 27 is inserted, and a guide member slider 38 is provided below the insertion hole. Then, by moving the guide member slider 38 along the machining unit guide rail 30, the guide member 37 can be moved in the X-axis direction. A fixing member (not shown) for fixing the guide member 37 to a desired position is provided below the guide member slider 38. Then, after the guide member 37 is moved along the processing unit guide rail 30, the guide member 37 can be fixed at a desired position by the fixing member (not shown).

  The machining unit drive unit 28 includes a main shaft rotation drive unit 33 (motor) that rotates the drive shaft with current, a power transmission belt 34 that transmits the drive force from the main shaft rotation drive unit 33 to the main shaft 27, and a drive unit. A main body portion 32 fixed to the upper portion of the slider 29 via a main body portion mounting base 39 is provided.

  A disk-like drive pulley 35 is provided on the drive shaft of the spindle rotation drive unit 33, and a disk-like slave pulley 36 is provided on one end of the spindle 27. The power transmission belt 34 is suspended between the drive pulley 35 and the subordinate pulley 36, and the driving force of the main shaft rotation drive unit 33 is transmitted from the drive pulley 35 to the subordinate pulley 36 via the power transmission belt 34. As a result, the main shaft 27 rotates.

  The power transmission belt 34, the drive pulley 35, and the slave pulley 36 are arranged inside a box-shaped casing 17 fixed to the side wall of the main body portion 32.

  The main body 32 has a cylindrical space formed therein, and the main shaft 27 is rotatably held through a through-hole provided in a side surface thereof. A main shaft rotation drive unit 33 is fixed to the upper portion of the main body 32 via the adapter 18. And since the main-body part 32 is being fixed to the displacement member 24 via the main-body-part installation stand 39, when the displacement member 24 moves along the process unit guide rail 30, the main-body part 32 also accompanies the movement. Move integrally in the X-axis direction. As will be described later, the external discharge pipe 19 shown in FIG. 1 is a pipe that sends chips generated during processing of the workpiece 100 and mist (including lubricating oil) supplied from the mist generating means to an external chip storage 19a. It is. Chips generated during machining of the workpiece 100 and mist (including lubricating oil) supplied from the mist generating means are stored in a chip storage through an external discharge pipe 19 from a chip discharge passage (described later) formed in a hollow portion of the main shaft 27. Sent to 19a.

  The pressure head 31 supplies mist generated by a mist generating means (described later) to a contact portion between a drill (described later) attached to the distal end portion of the main shaft 27 and a processed portion of the workpiece 100.

  A pressure head slider 40 is provided below the pressure head 31 via a pressure head mounting base 41. When the pressure head slider 40 moves along the processing unit guide rail 30, the pressure head 31 can move in the X-axis direction.

  In addition, a pressure head fixing member 42 for fixing the pressure head 31 at a desired position is provided below the pressure head slider 40. The pressure head fixing member 42 is fixed to the processing unit support member 4, and pressure head fixing holes are provided at regular intervals. The pressure head 31 can be fixed at a desired position by inserting a fixing portion (not shown) of the pressure head fixing member 42 into the pressure head fixing hole.

  As described above, after the pressure head 31 is moved along the processing unit guide rail 30, the pressure head 31 can be fixed at a desired position by the pressure head fixing member.

  A control panel 43 is attached to the pressure head installation base 41. When this control panel 43 is operated, the control signal is transmitted to a control unit (not shown) of the deep hole machining apparatus 1 to control deep hole machining of the workpiece 100. Details of the control panel 43 will be described later with reference to FIG. The flow control panel 81 shown in FIG. 2 will be described later with reference to FIG.

Next, the workpiece holder 101 will be described with reference to FIGS.
FIG. 3 is a view showing an XX cross section of FIGS. 1 and 2. The work base 103 is provided on an upper portion of the floor surface 2 or the like, and serves as a base for the work holding base 101. The workpiece base 103 is provided with a workpiece Z-axis direction moving means 104 that allows the workpiece holder 101 to move in the Z-axis direction at a portion in contact with the floor surface 2.

  The workpiece Z-axis direction moving means 104 is configured to move and rotate in the workpiece Z-axis direction in which a female screw cylinder (not shown) provided with a female screw provided at a lower portion of the workpiece base 103 and a male screw that is screwed to the female screw are formed. The work holding base 101 moves in the Z-axis direction by rotating the work Z-axis direction moving rotator 102.

  The work holding base 101 is provided with a work lower support part 105 (105a, 105b) that supports the lower part of the work 100. As shown in FIG. 1, the workpiece lower support portions 105 are provided at two locations in the longitudinal direction of the workpiece 100 and support the workpiece 100 at two locations on the left and right as shown in FIG. 3. The work lower support part 105 is provided with a rotating body 106 (106a, 106b) at a position in contact with the work 100, and the work 100 is supported by the rotating body 106. Further, the work lower support portion 105 can move in the Y-axis direction shown in FIGS. 1 and 3 by rotating the lower support portion moving handle 119 (119a, 119b). That is, the workpiece lower support portion 105 rotates the lower support portion moving handle 119 in the clockwise direction so that the workpiece lower support portions 105 (105a and 105a or 105b and 105b) approach each other (see FIG. 3). The workpiece lower support portion 105 (105a and 105a or 105b and 105b) moves away (see FIG. 3) by moving and rotating the lower support portion moving handle 119 in the counterclockwise direction.

  Specifically, a ball screw 120 (120a, 120b) is connected to the lower support portion moving handle 119 (119a, 119b), and the ball screw 120 is a winding direction of the screw with an intermediate position as a boundary. Is reversed (right screw and left screw). Therefore, when the lower support portion moving handle 119 is rotated, the ball screw 120 connected to the lower support portion moving handle 119 is rotated and screwed into the ball screw 120. The moved displacement member 123 (123a, 123b) moves in a direction approaching or moving away, and the work lower support part 105 also moves in a direction approaching (see FIG. 3) or moving away (see FIG. 3). . Accordingly, the workpiece 100 of any size can be supported by the workpiece lower support portion 105. The workpiece lower support portion 105 is moved along a workpiece lower support portion guide rail 122 by a workpiece lower support portion slider 121 (121a, 121b) provided at the lower portion of the workpiece lower support portion 105 (FIG. 1). (See the YY cross section in FIG. 2 and FIG. 3).

  A work upper support part 107 is provided on the upper part of the work lower support part 105b. The workpiece upper support portion 107 (see FIG. 3) is on the center axis of the workpiece 100 in the Z-axis direction, and includes the Y axis-Z-axis plane of the workpiece 100 including the points where the left and right workpiece lower support portions 105b contact the workpiece 100. The rotating body 108 (refer to FIG. 3) is provided on the outer peripheral surface of the motor. The workpiece upper support portion 107 can move in the Z-axis direction shown in FIGS. 1 and 3 by rotating the upper support portion moving handle 109. Thereby, the workpiece | work 100 can be hold | maintained by three-point support with the workpiece | work upper part support part 107 and the work lower part support part 105b.

  At the other end of the workpiece 100, a three-jaw chuck 111 that holds the workpiece 100 with three chucks is provided. In this three-jaw chuck 111, the three claws are interlocked so that the center of the chuck 111 coincides with the center of the workpiece 100 by rotating a handle (not shown) provided on the chuck mounting base 112. Move to. The workpiece 100 is held by these three claws.

  In addition, the chuck mount 112 is connected to a storage portion 113 in which a work rotation drive unit (not shown) is stored via a chuck rotating body 110. The work rotation drive unit (motor) is configured to drive the drive shaft of a work rotation drive unit (not shown) by current. Then, when the drive shaft of the workpiece rotation driving unit (not shown) rotates, the chuck mounting base 112 rotates via the chuck rotating body 110, and the workpiece 100 rotates by a certain angle. Specifically, the work 100 is rotated clockwise by a predetermined angle by pressing the forward rotation switch 114 (see FIG. 1) provided in the housing portion 113 once, and the reverse rotation switch 115 (see FIG. 1). Press once to rotate a certain amount of counterclockwise rotation. The fixed angle for rotating the workpiece 100 can be set by an angle setting device (not shown).

  Sliders 117 (117a, 117b) are provided at the lower part of the accommodating part 113 via an installation table 116a. The slider 117 (117a, 117b) moves along the guide rail 118 provided on the upper part of the workpiece base 103, so that the accommodating portion 113 (including the workpiece rotation driving portion) can move in the X-axis direction. It becomes.

  In addition, sliders 117 (117c, 117d) are also provided below the workpiece lower support portion 105a via an installation table 116b. Similarly, the slider 117 (117c, 117d) moves along the guide rail 118 provided at the upper part of the work base 103, so that the work lower support part 105a can move in the X-axis direction.

  Also, below the slider 117, a casing 20 a (which has the same structure as the above-described casing 20, X-axis direction movement drive unit 21, coupling 22, ball screw 23, displacement member 24, ball screw bearing 25, bearing 26). (Not shown), X-axis direction moving drive unit 21a (not shown), coupling 22a (not shown), ball screw 23a (not shown), displacement member 24a (not shown), ball screw bearing 25a (not shown), bearing 26a (not shown) is provided. When a current is supplied to the X-axis direction movement drive unit 21a, the ball screw 23a connected to the drive shaft of the X-axis direction movement drive unit 21a rotates, and the displacement member screwed into the ball screw 23a. By moving 24a in the X-axis direction, the accommodating portion 113 (including the workpiece rotation driving portion) can be moved in the X-axis direction.

  A fixing member (not shown) for fixing the work lower part support portion 105a at a desired position is provided below the slider 117 (117c, 117d). Then, after the workpiece lower support portion 105a is moved along the guide rail 118, the workpiece lower support portion 105a can be fixed at a desired position by the fixing member (not shown).

Next, the pressure head 31 will be described in detail with reference to FIG.
FIG. 4 is a cross-sectional view of the pressure head shown in FIGS. 1 and 2.

The pressure head 31 supplies mist generated by a mist generating means, which will be described later, to the contact portion of the workpiece 100 and the drill 45 and supports the main shaft 27. The pressure head 31 includes a guide member 44, a guide member 44, The pressure head main body 46 is coupled, a holding member 47 is coupled to the pressure head 46, and a casing 48.
The pressure head 31 is formed with a hollow portion through which the main shaft 27 is inserted. First, the main shaft 27 inserted through the hollow portion of the pressure head 31 will be briefly described.

  A hollow drill 45 for processing a deep hole in the workpiece 100 is attached to the end of the main shaft 27. The main shaft 27 and the drill 45 are connected by screwing a female screw provided on the inner surface of the end portion of the main shaft 27 and a male screw provided on the outer peripheral surface of the end portion of the drill 45. A hollow portion is formed in the central portion of the main shaft 27 along the axial direction. The hollow portion of the drill 45 and the hollow portion of the main shaft 27 constitute a chip discharge passage 27 a that discharges chips generated when forming a deep hole in the workpiece 100 to the outside of the deep hole processing apparatus 1. Chips and the like generated when forming a deep hole in the workpiece 100 are discharged from the chip discharge passage 27a of the drill 45 through the chip discharge passage 27a of the main shaft 27 to the outside.

  Next, the guide member 44 will be described. The guide member 44 includes a guide member main body 49 and a bush 50 fitted to the inner surface of the guide member main body 49.

  The guide member main body 49 is hollow and has a cylindrical shape, and is attached to an insertion hole 54 formed on the side wall of the end face of the pressure head main body 46. The pressure head main body 46 is coupled with a bolt at a flange portion provided at an end of the guide member main body 49.

  The bush 50 is made of a material (for example, carbon tool steel, high-speed tool steel, etc.) that can withstand wear and has considerable strength, and has a hollow bush hole 52 (hollow portion) through which the main shaft 27 can be inserted. ) Is formed. The inner diameter of the bush hole 52 is formed to be slightly larger than the outer diameter of the main shaft 27, and the mist is contacted between the processed portion of the workpiece 100 and the drill 45 between the inner peripheral surface of the bush hole 52 and the outer peripheral surface of the main shaft 27. A mist supply path 85 is formed for supplying to the section. As a result, mist generated by a mist generating means to be described later is sent from the inside of the pressure head 31 to the outside of the pressure head 31, and the mist is supplied to the processing portion of the workpiece 100 and the contact portion of the drill 45 as will be described later. it can. The seals 49a and 50a prevent the mist from leaking to the outside of the workpiece 100 when the mist is supplied to the processing portion of the workpiece 100 and the contact portion of the drill 45 as will be described later.

  Further, when the main shaft 27 swings in the radial direction when machining a deep hole in the workpiece 100 with the drill 45, the main shaft 27 comes into contact with the inner peripheral surface of the bush 50, so that the main shaft 27 swings in the radial direction. Can be prevented.

  Next, the pressure head main body 46 will be described. The pressure head main body 46 is provided with a mist supply port 55 connected to a mist generating means described later by a mist supply pipe (dotted line portion in FIG. 4). The mist generated by the mist generating means is supplied to the hollow portion of the pressure head 31 through the mist supply port 55. In the hollow portion of the pressure head 31, a mist chamber 56 partitioned by the end surface of the guide member 44 and the end surface of the holding member 47 described above is formed, and generated in the mist chamber 56 by mist generating means described later. The mist is pressurized by being supplied together with the compressed air, and the compressed air containing the mist is supplied to the processing portion of the workpiece 100 and the contact portion of the drill 45 while being pressurized in the mist chamber 56.

  As shown in FIG. 4, the end surface of the guide member 44 in the mist chamber 56 has an inner diameter that decreases in the mist traveling direction (the direction of the contact portion between the workpiece 100 and the drill 45). That is, in order to easily guide the mist to the processing portion of the workpiece 100 and the contact portion of the drill 45, the end surface of the cylindrical guide member 44 (the guide member main body 49 and the bush 50) is directed toward the traveling direction of the mist. Each of them is inclined so that the inner diameter is small. In addition, the inclination of the end surfaces of the guide member main body 49 and the bush 50 may be given to the whole of each end surface, or a part of each end surface may be given an inclination.

  In this way, by providing an inclination to the end face of the guide member 44 constituting the mist chamber 56, the mist can be easily guided to the contact portion of the workpiece 100 and the drill 45, and the flow of mist supply is further enhanced. be able to. Further, it is possible to prevent a problem caused by insufficient lubrication oil when performing deep hole machining, that is, a problem that the drill 45 and the workpiece 100 cannot be smoothly machined due to friction between them.

  As shown in FIG. 4, the supply path from the mist supply port 55 of the pressure head 31 to the external mist supply path outlet 57 is the direction in which the main shaft 27 moves toward the workpiece 100, that is, the X axis shown in FIG. Inclined in the negative direction (Θ1 = 10 degrees to 45 degrees (preferably, Θ1 = 15 to 30 degrees)). Thus, the mist supplied from the external mist supply path outlet 57 to the mist chamber 56 is inclined in the direction in which the main shaft 27 moves toward the workpiece 100, that is, in the negative direction of the X axis shown in FIG. 45 degrees (preferably, Θ1 = 15 to 30 degrees). In other words, a mist supply path 85 from the mist generating means described later to the external mist supply path outlet 57 is an external mist supply path, and the mist supply path from the external mist supply path outlet 57 to the drill 45 attached to the main shaft 27. When 85 is an internal mist supply path, the mist generated by the mist generating means described later moves from the outlet of the external mist supply path to the machining portion of the workpiece 100 with respect to the internal mist supply path. It will be supplied in a tilted direction. By comprising in this way, it becomes easy to guide a mist to the process part of the workpiece | work 100, and the contact part of the drill 45, and can further strengthen the flow of supply of mist. Further, it is possible to prevent a problem caused by insufficient lubrication oil when performing deep hole machining, that is, a problem that the drill 45 and the workpiece 100 cannot be smoothly machined due to friction between them.

  Next, the holding member 47 will be described. The holding member 47 includes a holding member main body 58, a bearing 59 fitted to the inner surface of the holding member main body 58, and an O-ring 60.

  The holding member main body 58 is hollow and cylindrical, and is attached to an insertion hole 61 formed in the side wall at the end of the pressure head main body 46. The pressure head main body 46 is coupled with a bolt at a flange portion provided at an end of the holding member main body 58. A bearing 59 (radial ball bearing) is provided on the inner peripheral surface 58 a of the holding member main body 58, and the main shaft 27 is rotatably supported by the bearing 59. Specifically, the bearing 59 is integrated with the main shaft 27 by pressing the inner ring 59a of the bearing 59 into the outer peripheral surface of the main shaft 27 via the bearing support pipe 51 and the cage 53, and the outer ring 59b of the bearing 59. Is pressed into the inner peripheral surface of the holding member 47 and integrated with the holding member 47. And it has the rolling element 59c between the inner ring | wheel 59a and the outer ring | wheel 59b. As a result, the main shaft 27 inserted through the hollow portion of the holding member 47 can be rotated.

  An O-ring 60 is provided between the outer peripheral surface of the main shaft 27 and the inner peripheral surface 58a of the holding member main body 58 on the workpiece 100 side from the position where the bearing 59 is provided. The O-ring 60 can prevent mist (lubricating oil) from leaking from the mist chamber 56 inside the pressure head 31 to the outside of the pressure head 31 through the hollow portion of the holding member 47.

  The casing 48 encloses the pressure head 31 and is fixed to the pressure head main body 46 with bolts 62.

Next, the drill shown in FIG. 4 will be described in detail with reference to FIG.
Fig.5 (a) is a side view of the drill shown in FIG. 4, FIG.5 (b) is a top view of the drill shown in FIG.

  The drill 45 uses a BTA tool that discharges mist (including lubricating oil) supplied to the processing portion of the workpiece 100 and chips generated during processing of the workpiece 100 from a center hole 63 provided at the tip. A cemented carbide chip 65 (cutting edge portion) provided in the center, a chip discharge passage 27a that communicates with the center hole 63 and penetrates the inside of the drill 45, and a female screw provided on the inner surface of the end portion of the main shaft 27. And a projection 66 provided on the outer peripheral surface of the drill 45.

  Next, the flow of the mist supplied to the processing part of the workpiece 100 and the chips generated during the processing of the workpiece 100 will be described with reference to FIG. FIG. 6 is an explanatory diagram of a mist and chip feed path when processing a workpiece.

  When the workpiece 100 is machined by the drill 45 shown in FIG. 5, the radius of the cutting hole 67 of the workpiece 100 is formed larger than the radius of the outer periphery of the drill 45 by the protrusion 66 of the drill 45. And the mist generated by the mist generation means mentioned later is supplied by making the clearance gap between the cutting hole of the workpiece | work 100 and the outer periphery of the drill 45 into the mist supply path 85. In other words, the mist supply path 85 formed on the outer peripheral surface of the drill 45 communicates with the mist supply path 85 formed between the outer peripheral surface of the main shaft 27 and the inner peripheral surface of the bush hole 52, thereby generating mist generating means. The mist generated by the above is supplied to the machining part of the workpiece 100. In this way, when machining a deep hole in the workpiece 100, the mist (including lubricating oil) supplied from the mist supply passage 85 is cut along with the chips generated by cutting the workpiece 100, and the center hole 63 of the drill 45. 1 through the drill 45 and the chip discharge passage 27 a formed in the hollow portion of the main shaft 27, and is discharged from the external discharge pipe 19 shown in FIGS. 1 and 2 to the outside of the deep hole processing apparatus 1.

Next, the control panel 43 shown in FIG. 1 will be described with reference to FIG.
FIG. 7 is an explanatory diagram of a control panel used in the deep hole machining apparatus in one embodiment of the present invention. The control panel 43 is provided with operation switches and the like for moving the drill 45 in the X-axis direction shown in FIG.

  The operation power switch 68 is a power switch for the deep hole machining apparatus 1, and the deep hole machining apparatus 1 can be driven by setting the operation power switch 68 to “ON”.

  The single automatic changeover switch 69 is a changeover switch between “automatic” and “single”. That is, when it is desired to operate the drill 45 in a predetermined process, the single automatic changeover switch 59 is set to “automatic”, and when the operator wants to rotate the drill 45 in an arbitrary process, the single automatic changeover switch 59 is set. 69 is set to “single”. When the single automatic changeover switch 69 is set to “automatic”, when the operator presses the automatic operation button 70, the drill 45 rotates and moves in a predetermined process. That is, when the single automatic changeover switch 69 is “automatic”, the automatic operation button 70 is pushed by the operator, and the driving force of the X-axis direction moving drive unit 21 shown in FIG. The driving unit 28 of the machining unit moves in the X-axis direction via the driving unit slider 29 and the drill 45 moves in the X-axis direction. The driving force of the main shaft rotation driving unit 33 rotates the main shaft 27 and the drill 45 moves. Rotate.

  The automatic stop button 71 is a button that is pressed when it is desired to stop the automatic operation. Then, when the automatic stop button 71 is pressed by the operator, the automatic operation is stopped.

  Next, when the single automatic changeover switch 69 is set to “single”, when the forward rotation button 72 is pressed by the operator, the drill 45 rotates forward (rightward). Further, when the exact size button 73 is pressed by the operator, the drill 45 is moved in the direction of the workpiece 100 (X-axis negative direction in FIG. 1), and when the reverse size button 74 is pressed by the operator, the drill 45 is moved. It moves in a direction away from the workpiece 100 (the positive direction of the X axis in FIG. 1). That is, when the single automatic changeover switch 69 is “single” and the forward rotation button 70 is pressed by the operator, the main shaft 27 is rotated by the driving force of the main shaft rotation driving unit 33 and the drill 45 is rotated. In addition, when the single automatic changeover switch 69 is “single” and the exact size button 73 (or the reverse size button 74) is pressed by the operator, the driving force of the X-axis direction movement driving unit 21 causes the driving unit slider. The driving unit 28 of the machining unit is moved in the negative direction (or positive direction) in the X-axis direction via 29, and the drill 45 is moved in the negative direction (or positive direction) in the X-axis direction.

  The stop button 75 is a button that is pressed when it is desired to stop the single operation. Then, when the stop button 75 is pressed by the operator, the single operation is stopped. The emergency stop button 76 is a button that is pressed when it is desired to urgently stop the operation of the deep hole machining apparatus 1 (single operation and automatic operation). The operation is stopped by pressing the emergency stop button 76 by the operator.

  The spindle speed setting switch 77 is a switch for setting the rotational speed of the spindle 27. In the present embodiment, the rotational speed of the main shaft 27 can be set in 10 stages. Then, when the forward rotation button 72 is pressed by the operator and the automatic operation button 70 is pressed, the spindle 27 rotates at the speed set by the spindle speed setting switch 77.

  The spindle speed meter 78 displays the rotational speed of the spindle 27. With this spindle speed meter 78, the operator can know the current rotational speed of the spindle 27.

  The power lamp 79a is a lamp that is lit when the operation power switch 68 is “ON”, the automatic lamp 79b is a lamp that is lit when automatic operation is being performed, and the single lamp 79c is a single operation. It is a lamp that lights up when the operation is performed. The operator can know the power supply status and the operation status by using these lamps.

  The display 80 is a touch panel display, and an operator can perform an operation for controlling the deep hole machining apparatus 1 and the work holding table 80 using the display 80.

  Next, the flow control panel will be described with reference to FIG. FIG. 8 is an explanatory diagram of a flow rate control panel used in the deep hole machining apparatus in one embodiment of the present invention.

  The flow rate control panel 81 uses compressed air from a compressor (not shown), generates mist with the compressed air and lubricating oil, supplies the mist to the processing part of the workpiece 100, and also supplies compressed air from the compressor. Is supplied to the machining portion of the workpiece 100. In the present embodiment, the gas supplied from the compressor (not shown) is described as compressed air. However, the present invention is not limited to this, and a gas such as nitrogen gas may be used as long as the effect of the present invention is achieved. The flow rate control panel 81 includes a gas supply path 82 that supplies compressed air from a compressor (not shown) to the processing part of the workpiece 100 via a mist supply path 85, and a compressor (not shown) when chips are clogged in the processing part. A pressurized supply path 83 for supplying compressed air from the abbreviation) to the machining portion of the workpiece 100 via the mist supply path 85, and a primary flow path for supplying the compressed air from the compressor (not shown) to the mist generating means 86. 84, and a mist supply path 85 for supplying the mist generated by the mist generating means 86 to the machining portion of the workpiece 100. In the present embodiment, the gas supply path 82 and the pressurized supply path 83 will be described for convenience. However, the present invention is not limited to this, and the gas supply path 82 and the pressurized supply path 83 are combined to form the gas supply path 82. Also good.

  The gas supply path 82 is a supply path for supplying compressed air to the mist supply path 85 so that the mist generated by the mist generating means 86 can reach the processing portion of the workpiece 100. A total 88, a flow meter 89, and a manual hold valve 90 are provided.

  Further, the pressure supply path 83 is provided with a regulator 91 and a solenoid valve 92. The primary side flow path 84 is provided with a pressure gauge 93 and a flow meter 95. The pressure control device 87 controls the pressure of the compressed air in the gas supply path 82.

  The pressure gauges 88 and 93 measure the pressure of the compressed air flowing through the gas supply path 82 and the primary side flow path 84, respectively. The pressure gauges 88 and 93 are compressed through the pressure gauges 88 and 93, respectively. A digital display (see FIG. 8) for displaying the pressure value of air is provided.

  The flow meters 89 and 95 measure the flow rate of the compressed air flowing through the gas supply path 82 and the primary side flow path 84, respectively, and the flow meters 89 and 95 include the compression passing through the flow meters 89 and 95, respectively. A digital display (see FIG. 8) for displaying the air flow rate value is provided.

  The manual hold valve 90 prevents the compressed air upstream of the manual hold valve 90 from flowing downstream. The manual hold valve 90 shown in FIG. 8 is in a state in which the compressed air on the upstream side of the manual hold valve 90 flows downstream (“open” state) by moving the lever of the manual hold valve 90 in the lateral direction. By setting the lever of the valve 90 in the vertical direction, the compressed air on the upstream side of the manual hold lever 90 does not flow downstream (“closed” state). The manual hold lever 90 is normally in an “open” state when the workpiece 100 is drilled into a deep hole.

  Regulator 91. The pressure of compressed air supplied from a compressor (not shown) is reduced to a constant pressure and sent to the downstream side. Specifically, by rotating a pressure adjusting unit (not shown) provided in the regulator 91 with a tool (not shown), a pressure reducing valve (not shown) inside the regulator 91 is operated, The pressure of the compressed air to be sent is set. Thereby, the pressure of the compressed air sent out from the regulator 91 can be made into a desired constant pressure. The pressure value set by operating this pressure adjusting unit (not shown) is displayed on the display unit (see FIG. 8) of the regulator 91.

  The solenoid valve 92 is a valve that receives a signal from the control device 99 and enters an “open” state when it is detected that chips are clogged between the machining portion of the workpiece 100 and the drill 45. When it is detected that chips are clogged between the machining portion of the workpiece 100 and the drill 45, the solenoid valve 92 is in an “open state”, compressed air is supplied to the pressure supply path 83, and the pressure is increased. The compressed air from the pressurized supply path 83 is sent to the mist supply path 85 from the supply path 83 via the gas supply path 82 (the pressurized supply path 83 merges with the gas supply path 82 by the manifold 96).

  Thereby, the flow volume of the compressed air of the mist supply path 85 increases, and the clogging of the chip | tip between the process part of the workpiece | work 100 and the drill 45 can be eliminated.

  The mist generating means 86 stores lubricating oil therein, and is supplied with compressed air from the primary side flow path 84 to generate mist inside and send the mist to the mist supply path 85. It is. Specifically, the mist generating means 86 includes a tank (not shown) for storing lubricating oil, a lid (not shown) attached to the tank, and a venturi for atomizing the oil that is attached to the lid and supplied dropwise. An atomizer (not shown), a heating element (not shown) for warming the lubricating oil to a predetermined temperature, and air supply means (not shown) for supplying compressed air to the venturi atomizer. Then, the lubricating oil in the tank is sucked up by the lubricating oil suction pipe attached to the lid, and the lubricating oil is supplied to the venturi atomizer via the lubricating oil supply passage formed from the lid to the venturi atomizer. Is done. The lid is provided with an oil adjustment needle for adjusting the amount of lubricating oil sent to the venturi-type atomizer and a compressed air adjustment needle for adjusting the pressure of the compressed air supplied by the air supply means. When the mist flow rate setting switch 97 is operated, the compressed air adjustment needle and the oil adjustment needle are operated, and the mist set by the mist flow rate setting switch 97 is sent to the mist supply path 85.

  The mist flow rate setting switch 97 is a manual switch for setting the amount of mist generated (the amount of mist sent to the mist supply path 85). Specifically, as shown in FIG. 8, by operating the switches 97a to 97e of the mist flow rate setting switch 97 from OFF to ON, the amount of mist corresponding to the switches 97a to 97e (for example, 15L, 50L, 100L, The mist of 150L and 5 steps of 250L) is sent from the mist generating means 86 to the mist supply path 85. In this embodiment, the mist flow rate setting switch 97 is a manual switch, and the mist flow rate is set by operating the manual switch. However, the present invention is not limited to this. The mist amount may be automatically set based on the traveling speed in the X-axis direction shown in FIG. Further, when it is detected that chips are clogged between the processed portion of the workpiece 100 and the drill 45, the amount of mist for chip discharge may be automatically set.

  The manifold 98 joins the gas supply path 82 to the mist supply path 85. Thereby, the mist generated by the mist generating means 86 can be conveyed to the processing part of the workpiece 100 using the gas from the gas supply path 82. The control device 99 controls each device of the flow rate control panel.

Next, operation | movement and effect of the deep hole processing apparatus 1 of this invention are demonstrated.
FIG. 9 is a flowchart of deep hole processing in one embodiment of the present invention.

First, in S1, it is determined whether or not the operation power is turned on. The operation power supply is turned “ON” when the operator turns on the operation power switch 68 shown in FIG. Thereby, the deep hole processing apparatus 1 is in a drivable state. If it is determined in S1 that the operating power source is “ON” (in the case of “YES”), the process proceeds to S2, and if it is “NO”, the deep hole processing is terminated.
In the present embodiment, a case where the single automatic changeover switch 69 is “single” will be described.

  In S2, it is determined whether or not the workpiece 100 and the pressure head 31 are in contact with each other. Specifically, a pressure sensor (not shown) is provided on the end surface of the guide member main body 49, and it is determined by the pressure sensor whether the end surface of the workpiece 100 and the end surface of the pressure head 31 are in contact with each other. Here, in S2, if “YES”, the process proceeds to S3, and if “NO”, the deep hole processing ends.

  Next, in S <b> 3, the mist generated by the mist generating device 86 and the compressed air supplied from the gas supply path 82 (including the pressurized supply path 83) of the workpiece 100 facing the drill 45 through the mist supply path 85. Supplied to the processing section. Specifically, when it is determined that the end surface of the workpiece 100 and the end surface of the pressure head 31 are in contact with each other, the control unit (not shown) of the deep hole processing device 1 sends the control device 99 of the flow rate control panel 81 to the control device 99. A signal is transmitted, and the pressure control device 87 and the mist generating device 86 are controlled by the control device 99 that has received the signal. Then, the valve of the pressure control device 87 is opened, compressed air is supplied to the gas supply path 82, and mist is supplied from the mist generating means 86. Thereby, mist and compressed air are supplied to the processing part of the workpiece 100 via the mist supply path 85.

  Here, the mist is supplied in the amount of mist set by the mist flow rate setting switch 97, and the compressed air is flow rate set value (LSET) set by the operator on the touch panel type operation panel (display 80) shown in FIG. ).

  Next, in S4, a spindle normal rotation process, which will be described later, is performed. In the main shaft forward rotation processing, the main shaft 27 to which the drill 45 is attached is rotated forward (clockwise) by the driving force of the main shaft rotation drive unit 33 (motor). Details will be described later with reference to FIG.

  Next, in S5, a main spindle positive direction moving process described later is performed. In the main shaft positive direction moving process, the main shaft 27 to which the drill 45 is attached is moved in the positive direction (the direction of the workpiece 100) by the driving force of the X axis direction moving drive unit 21. Then, the drill 45 comes into contact with the processed portion of the workpiece 100, and further, the drill 45 moves in the direction of the workpiece 100 (X-axis negative direction in FIG. 1), so that the workpiece 100 is super It is cut by a hard alloy tip 65 (cutting edge portion). Details will be described later with reference to FIG.

  In S6, a clogging process to be described later is performed. In the clogging process, when chips generated during deep hole forming are clogged between the drill 45 and the workpiece 100, compressed air is supplied from the pressurized supply path 83 to the mist supply path 85 via the gas supply path 82. The Thereby, clogging of chips between the drill 45 and the workpiece 100 can be reliably eliminated by the compressed air in the gas supply path whose flow rate has increased. The mist supply process is performed in a state where the workpiece 100 and the pressure head 31 are in contact with each other. Can be reliably supplied to the contact portion.

  Thus, when a deep hole is machined in the workpiece 100 by the drill 45, the gap between the machining portion of the workpiece 100 and the drill 45 can be lubricated over a wide range, and the gap between the machining portion of the workpiece 100 and the drill 45 can be cooled over a wide range. Therefore, it is not difficult to process a deep hole due to friction between the drill 45 and the workpiece 100.

  Next, in S7, it is determined whether or not cutting of the workpiece 100 has been completed. In the present embodiment, it is determined that the cutting of the workpiece 100 is completed when the drill 45 that is machining a deep hole in the workpiece 100 penetrates to the opposite side of the workpiece 100. Specifically, in this embodiment, it is determined whether or not the cutting of the workpiece 100 has been completed by detecting a change in the torque change rate of the X-axis direction movement drive unit 21 (motor). That is, while the workpiece 100 is being cut by the drill 45, the X-axis direction movement drive unit 21 is driven at a high torque, but the cutting of the workpiece 100 is finished and the drill 45 penetrates to the opposite side of the workpiece 100. In this case, the X-axis direction movement drive unit 21 is driven with low torque. Therefore, it is possible to determine whether or not the cutting of the workpiece 100 has been completed by obtaining the transition of the change rate of the torque. In the present embodiment, it is determined whether or not the cutting of the workpiece 100 has been completed based on the change in the torque change rate of the X-axis direction movement drive unit 21. However, the present invention is not limited to this. It may be determined whether the cutting of the workpiece 100 has been completed by detecting the transition of the change rate. That is, while the workpiece 100 is being cut by the drill 45, the spindle rotation driving unit 33 is driven with high torque, but when the workpiece 100 is cut by the drill 45, the spindle rotation driving unit 33 is driven with low torque. Will be. Therefore, it can be determined whether or not the cutting of the workpiece 100 has been completed from the change in the torque change rate.

  In the present embodiment, it is determined that the cutting of the workpiece 100 has been completed when the drill 45 that is machining a deep hole in the workpiece 100 has penetrated to the opposite side of the workpiece 100. The point in time when the predetermined process for cutting the workpiece 100 is completed may be the point in time when the cutting of the workpiece is completed. In this case, the control unit (not shown) provided in the deep hole machining apparatus 1 receives a signal that a predetermined process has been completed, so that it is determined that the cutting of the workpiece 100 in S7 has been completed. The Here, if “NO” in S7, the process proceeds to S6 to continue the clogging process. If “YES” in S7, the process proceeds to S8.

  Next, in S8, a spindle reverse direction moving process is performed. In the main shaft reverse direction moving process, the main shaft 27 is moved in the direction opposite to the above-described normal direction (the positive direction of the X axis in FIG. 1). That is, the control unit (not shown) of the deep hole control device 1 reverses the polarity of the current of the power supplied to the X-axis direction movement drive unit 21, thereby reversing the direction in which the main shaft 3 is moved in S5. The main shaft 27 moves in the direction away from the workpiece 100, whereby the drill 45 can be detached from the deep hole formed in the workpiece 100. Details will be described later with reference to FIG.

  In S9, a spindle rotation stop process is performed. In this spindle rotation stop process, the rotation of the spindle 27 is stopped. Details will be described later with reference to FIG.

  Next, in S10, supply stop processing of the mist generated by the mist generator 86 and the compressed air supplied from the gas supply path 82 (including the pressurized supply path 83) is performed. Specifically, the control device 99 controls the pressure control device 87 and the mist generation device 86, the valve of the pressure control device 87 is closed, the supply of compressed air to the gas supply path 82 is stopped, and the mist generation means 86 is also performed. The supply of mist from is also stopped. Thereby, the deep hole processing of the workpiece 100 is completed.

  In the present invention, the mist generated by the mist generating means 86 is supplied to the processing portion of the workpiece 100 and the contact portion of the drill 45 together with the compressed air supplied from the gas supply path 82, so that only lubricating oil is supplied to the processing portion of the workpiece 100. Compared to the case of supplying to the machine, the amount of lubricating oil used when drilling deep holes can be reduced, the cost required for lubricating oil can be reduced, and the mist can be reliably secured by compressed air. 100 processed parts can be sent.

Next, the spindle normal rotation process shown in FIG. 9 will be described.
FIG. 10 is a flowchart of the spindle normal rotation process of FIG. This main shaft forward rotation process is a process for rotating the main shaft 27 (including the drill 45) in the forward rotation direction (clockwise direction).

In S11, it is determined whether or not the forward rotation button is “ON”. Whether or not the forward rotation button is “ON” is determined by whether or not the forward rotation button 72 shown in FIG. 7 has been pressed by the operator.
When it is determined in S11 that the forward rotation button 72 has been pressed by the operator (in the case of “YES” in S11), the main shaft 27 rotates forward in S12. That is, the driving force of the main shaft rotation driving unit 33 is transmitted from the driving pulley 35 to the subordinate pulley 36 via the power transmission belt 34, and the main shaft 27 rotates in the normal rotation direction (clockwise direction). In the present embodiment, the rotational speed of the main shaft 27 is set to around 800 rpm. As a result, the drill 45 attached to the main shaft 27 also rotates in the forward rotation direction. Then, when the process of S12 is completed, or when “NO” is determined in S11, the spindle normal rotation process is completed.

Next, the main spindle positive direction moving process shown in FIG. 9 will be described.
FIG. 11 is a flowchart of the main shaft positive direction moving process of FIG. The main shaft positive direction moving process is a process for moving the main shaft 27 (including the drill 45) in the positive direction (the direction of the workpiece 100).

  In S21, it is determined whether or not the exact size button is “ON”. Whether or not the exact size button is “ON” is determined by whether or not the exact size button 73 shown in FIG. 7 is pressed by the operator.

  If it is determined in S21 that the operator has pressed the exact size button 73 ("YES" in S21), the spindle 27 moves in the direction of the workpiece 100 in S22. That is, the driving force of the X-axis direction movement driving unit 21 (motor) is transmitted from the ball screw 23 to the driving unit 28 of the machining unit via the displacement member 24 (ball screw nut), and the main shaft 27 is moved to the workpiece direction (X Move in the negative axis direction. In the present embodiment, the moving speed at which the main shaft 27 moves in the negative direction of the X axis toward the workpiece 100 is set to 50 mm / min. As a result, the drill 45 attached to the main shaft 27 also moves in the negative direction of the X axis. Then, when the process of S22 is completed, or when “NO” is determined in S21, the spindle positive direction movement process is completed.

Next, the clogging supply process shown in FIG. 9 will be described.
FIG. 12 is a flowchart of the clog supply process of FIG. In this clogging process, when chips are clogged between the machining portion of the workpiece 100 and the drill 45, the workpiece 100 is supplied with high-pressure compressed air from the pressurized supply passage 83 through the gas supply passage 82 and the mist supply passage 85. It is sent out to the processing part of this to eliminate clogging of chips.

  In S31, the flow rate L of the compressed air in the gas supply path 82 is detected. Specifically, the flow rate of the compressed air flowing through the gas supply path 82 is detected by a flow meter 89 provided in the gas supply path 82.

  In S32, it is determined whether or not the value of the flow rate L detected in S31 is less than a predetermined value X. Specifically, the clogged flow rate value X set by the operator on the touch panel type operation panel (display 80) shown in FIG. 7 is compared with the flow rate value L detected by the flow meter 89, and the flow rate value L is calculated. The control device 99 determines whether or not the clogging flow rate value X or less. If “YES” is determined in S32, it is determined that the processing portion of the workpiece 100 is clogged with chips, and the process proceeds to S33.

  In S33, the flow rate of the gas supply path 82 is increased. Specifically, when it is determined that the flow rate value L is less than or equal to the clogged flow rate value X, a signal is transmitted from the control device 99 to the solenoid valve 92, and the solenoid valve 92 that has received the signal has a short time (for example, It is controlled to be in the “open” state (for example, 1 second or 3 seconds). Accordingly, even when high-pressure compressed air is supplied from the pressurized supply path 83 to the mist supply path 85 through the gas supply path 82 and chips are clogged between the processed portion of the workpiece 100 and the drill 45, Clogging can be eliminated.

  Then, in S34, it is determined whether or not the flow rate L is greater than or equal to the set flow rate value LSET. Specifically, the set flow rate value LSET and the flow rate value L detected by the flow meter 89 are compared, and the control device 99 determines whether or not the flow rate value L is greater than or equal to the set flow rate value LSET. If “NO” is determined in S <b> 34, the process further proceeds to S <b> 33 and the process of S <b> 33 is performed. Then, again, the solenoid valve 92 is controlled to be in the “open” state for a short time (for example, 1 second or 3 seconds) by S33, and S33 → S34 → S33 until the clogging of chips in the machining part of the workpiece 100 can be eliminated. Loop processing is performed. Thereby, clogging of chips between the processed portion of the workpiece 100 and the drill 45 can be completely eliminated. If “YES” in S34 or “NO” in S32, the clogging process ends. Here, the set flow rate value LSET is a flow rate set value set by the operator on the touch panel type operation panel (display 80) shown in FIG.

As a result, even when chips are clogged in the processed part of the workpiece 100, the compressed air is supplied to the mist supply passage 85, so that clogging of the chips can be eliminated and the cutting edge of the drill 45 is crushed during deep hole cutting. It is possible to prevent the main shaft 27 from being damaged, such as damage to the main shaft 27 and the main shaft 27 from breaking.
In this embodiment, when the flow rate value L is determined to be equal to or greater than the set flow rate value LSET in S34, the clogging process is immediately terminated. The clogging process may be terminated when it is determined that the flow rate value L is continuously greater than or equal to the set flow rate value LSET.

Next, the spindle reverse direction moving process shown in FIG. 9 will be described.
FIG. 13 is a flowchart of the spindle reverse direction moving process of FIG. The main shaft reverse direction moving process is a process for moving the main shaft 27 (including the drill 45) in the reverse direction (the direction away from the drill 100).

  In S41, it is determined whether or not the reverse size button is “ON”. Whether or not the reverse size button is “ON” is determined by whether or not the reverse size button 74 shown in FIG. 7 is pressed by the operator. When the reverse size button 74 is pressed, even if the exact size button 73 is in the “ON” state, it is in the “OFF” state.

  If it is determined in S41 that the reverse size button 74 has been pressed (in the case of "YES" in S41), the main shaft 27 moves in a direction away from the workpiece (in the positive X-axis direction) in S42. That is, the driving force of the X-axis direction movement drive unit 21 (motor) is transmitted from the ball screw 23 to the drive unit 28 of the machining unit via the displacement member 24 (ball screw nut), and the main shaft 27 is separated from the workpiece 100. Move in the positive direction of the X axis. In this embodiment, the moving speed at which the main shaft 27 moves in the direction away from the workpiece 100 (the positive direction of the X axis) is set to 3000 mm / min. Thereby, the drill 45 attached to the main shaft 27 also moves in the positive direction of the X axis shown in FIG. When the process of S42 is completed, or when “NO” is determined in S41, the spindle reverse direction movement process is completed. The movement of the spindle 27 in the direction away from the workpiece 100 is performed by reversing the polarity of the current supplied to the X-axis direction movement drive unit 21 by the control unit (not shown) of the deep hole machining apparatus 1. It can be carried out.

Next, the spindle rotation stop process shown in FIG. 9 will be described.
FIG. 14 is a flowchart of the spindle rotation stop process of FIG. This spindle rotation stop process is a process for stopping the rotation of the spindle 27 (including the drill 45).

  In S51, it is determined whether or not the stop button is “ON”. Whether or not the stop button is “ON” is determined by whether or not the stop button 75 shown in FIG. 7 is pressed by the operator. When the stop button 75 is pressed, even if the forward rotation button 72, the exact size button 73, and the reverse size button 74 are in the “ON” state, the “OFF” state is set. As a result, the deep hole processing ends, but the deep hole processing is started again (RETURN).

  In the present embodiment, as described above, the case where the single automatic changeover switch 69 is set to “single” has been described, but the same processing is also performed when it is set to “automatic”. That is, when the operator presses the automatic operation button 70, the drill 45 is rotated and moved in a predetermined process. That is, when the automatic operation button 70 is pressed by the operator when the single automatic changeover switch 69 is “automatic”, when it is determined in S2 that the workpiece 100 and the pressure head 31 are in contact with each other, S3 ( Mist and gas supply start), S4 (spindle 27 forward rotation), S5 (spindle 27 forward movement) are performed in a predetermined process, and then the clogging process of S6 is performed. The processes of S8 (reverse movement of the main shaft 27), S9 (stop rotation of the main shaft 27), and S10 (stop supply of mist and gas) are respectively performed in the determined steps, and the deep hole processing is completed. As a result, even when the single automatic changeover switch 69 is set to “automatic”, the same operation and effect as in the case of “single” can be achieved for the clogging process.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Next, a modified example of the present invention will be described.
(1) In the present embodiment, whether or not chips are clogged is detected by the clogging flow rate value X set by the operator and the flow meter 89 on the touch panel type operation panel (display 80) shown in FIG. The flow rate value L is compared, and when the flow rate value L is clogged or less than the flow rate value X, the control device 99 determines that the machining portion of the workpiece 100 is clogged. However, the present invention is not limited to this. Instead of the processes of S31 and S32, the pressure of the compressed air in the gas supply path 82 is detected by the pressure gauge 88 in S31, and the operation is performed on the touch panel type operation panel (display 80) shown in FIG. 7 in S32. The clogging pressure value P set by the user and the pressure M of the compressed air flowing through the gas supply path 82 detected by the pressure gauge 88 are compared, and the pressure value M is equal to or less than the clogging pressure value P. In the above case, the control device 99 may determine that chips are clogged in the processed portion of the workpiece 100. In this case, when it is determined that the pressure value M is greater than or equal to the clogging pressure value P, the process of S33 in FIG. 12 is performed.

  Further, instead of the processing of S31 and S32 in FIG. 12, in S31, the rotational torque (driving force) of the spindle rotation drive unit 33 is detected by a rotational torque detection sensor (not shown), and in S32, FIG. The clogging torque K set by the operator on the touch panel type operation panel (display 80) shown in the figure is compared with the rotation torque Q of the spindle rotation drive unit 33 detected by the rotation torque detection sensor, and the rotation torque Q is clogged. When the torque is equal to or greater than K, the control device 99 may determine that chips are clogged in the processed portion of the workpiece 100. In this case, when it is determined that the rotational torque Q is equal to or greater than the clogging torque K, the process of S33 in FIG. 12 is performed.

  Further, a temperature sensor (not shown) for detecting the temperature of the workpiece 100 is provided in the vicinity of the outer peripheral surface of the workpiece 100 on a straight line connecting the center of the workpiece 100 and the tip of the drill 45, and the processing of S31 and S32 in FIG. Instead, in S31, the temperature of the workpiece 100 near the outer peripheral surface of the workpiece 100 on a straight line connecting the center of the workpiece 100 and the tip of the drill 45 is detected by the temperature sensor, and in S32, the touch panel shown in FIG. The clogging temperature T set by the operator on the operation panel (display 80) is compared with the temperature N on the outer peripheral surface of the workpiece 100 detected by the temperature sensor (not shown), and the temperature N is the clogging temperature. In the case of T or more, it may be determined by the control device 99 that the processing part of the workpiece 100 is clogged with chips. In this case, when it is determined that the temperature N is equal to or higher than the clogging temperature T, the process of S33 in FIG. 12 is performed. The temperature sensor (not shown) is provided with temperature sensor moving means (not shown), and the temperature sensor is moved on the outer peripheral surface of the workpiece 100 in synchronization with the progress of the drill 45 by the temperature sensor moving means. . Thereby, even after the drill 45 moves in the X-axis negative direction (the direction of the workpiece 100) by the driving force of the X-axis direction movement drive unit 21 (motor), the center of the workpiece 100 and the tip of the drill 45 are moved. The temperature of the workpiece 100 in the vicinity of the outer peripheral surface of the workpiece 100 on the connecting straight line can be detected by a temperature sensor (not shown).

  Further, a processing tool temperature sensor (not shown) for detecting the temperature in the vicinity of the tip of the drill 45 is provided at the tip (or the peripheral portion) of the drill 45, and in S31 instead of the processing of S31 and S32 in FIG. The processing tool temperature in the vicinity of the tip of the drill 45 is detected by the processing tool temperature sensor, and the clogging processing tool temperature set by the operator on the touch panel type operation panel (display 80) shown in FIG. DT and the processing tool temperature DN near the tip of the drill 45 detected by a processing tool temperature sensor (not shown) are compared, and when the processing tool temperature DN is higher than the clogging processing tool temperature DT, the processing portion of the workpiece 100 is processed. It may be determined by the control device 99 that chips are clogged. In this case, when it is determined that the processing tool temperature DN is equal to or higher than the clogging processing tool temperature DT, the process of S33 in FIG. 12 is performed.

  Further, a chip temperature sensor (not shown) for measuring the temperature of chips generated during the deep hole forming process is provided in the chip discharge passage 27a, and instead of the processes of S31 and S32 in FIG. A chip temperature sensor detects the temperature of chips generated during processing, and in S32, the clogging chip temperature KT and the chip temperature sensor (set by the operator on the touch panel type operation panel (display 80) shown in FIG. 7) The chip temperature KN of the chip generated during the deep hole forming process detected by (not shown) is compared, and when the chip temperature KN is clogged or higher than the chip temperature KT, the processed part of the workpiece 100 is clogged. May be determined by the control device 99. In this case, when it is determined that the chip temperature KN is equal to or higher than the clogged chip temperature KT, the process of S33 in FIG. 12 is performed.

  (2) In the present embodiment, when it is determined in S32 of FIG. 12 that the flow rate value L is clogged or less than the flow rate value X, a signal is transmitted from the control device 99 to the solenoid valve 92, and the solenoid valve 92 is sent in S33. Is controlled to be in the “open” state for a short time (for example, 1 second or 3 seconds), but not limited to this, the flow control device and the flow sensor are pressurized instead of the solenoid valve 92. When the flow rate value L is determined to be less than or equal to the clogged flow rate value X provided in the supply path 83, a signal is transmitted from the control device 99 to the flow rate control device, and compressed in step S33 by the flow rate control device that received the signal. You may control so that it may increase until the flow volume of air becomes a preset flow volume value.

  Further, instead of the solenoid valve 92, a pressure control device and a pressure sensor are provided in the pressurization supply path 83, and the flow rate value L is clogged and the flow rate value X or less (in the modification (1), the pressure value M is clogged pressure value). In the case where it is determined that the pressure is equal to or greater than P), a signal is transmitted from the control device 99 to the pressure control device until the pressure of the compressed air reaches a pressure value set in advance by the pressure control device that has received the signal in S33. You may control so that it may be increased.

  (3) In the present embodiment, the mist supply path 85 is provided on the outer peripheral surface of the main shaft 27, and mist (including lubricating oil) supplied from the mist supply path 85 and chips generated during the deep hole forming process are removed. Although the deep hole processing device 1 that discharges to the outside of the deep hole processing device 1 through the chip discharge passage 27a inside the main shaft 27 has been described, the present invention is not limited thereto, and the hollow portion (inside) of the main shaft 27 is used as a mist supply path. Mist is supplied from the mist supply path to the machining portion of the workpiece 100, and the mist supplied from the chip discharge passage provided on the outer peripheral surface of the main shaft 27 and the mist supplied from the mist supply path at the time of forming the deep hole. (Including lubricating oil) may be discharged to the outside of the deep hole machining apparatus 1.

  Further, instead of the main shaft 27 and the drill 45, a long and narrow long drill is used, and the long drill is rotated while moving the long drill toward the direction of the workpiece 100 (the negative direction of the X axis in FIG. 1). At the same time, lubricating oil is supplied to the processed part of the workpiece 100 through the mist supply path formed in the hollow part of the long drill, and deep holes are formed through the V-shaped groove provided around the long drill. Chips generated during processing and mist (including lubricating oil) supplied from the mist supply path may be discharged to the outside of the deep hole processing apparatus 1.

  (4) In the present embodiment, in the supply path from the mist supply port 55 of the pressure head 31 to the external mist supply path outlet 57, the direction in which the main shaft 27 moves toward the workpiece 100, that is, the X-axis negative shown in FIG. However, the present invention is not limited to this, and the mist generated by the mist generating means 86 is eccentric along the rotational direction of the main shaft 27 with respect to the internal mist supply path from the above-described external mist supply path outlet. You may comprise so that it may be supplied. That is, as shown in FIG. 15 (the ZZ cross section in FIG. 4), the extension line of the central axis of the supply path from the mist supply port 55 of the pressure head 31 to the external mist supply path outlet 57 is on the rotational direction side of the main shaft 27. You may comprise so that it may be eccentric.

  By comprising in this way, it becomes easy to guide a mist to the process part of the workpiece | work 100, and the contact part of the drill 45, and can further strengthen the flow of supply of mist. Further, it is possible to prevent a problem caused by insufficient lubrication oil when performing deep hole machining, that is, a problem that the drill 45 and the workpiece 100 cannot be smoothly machined due to friction between them.

  Further, the supply path from the mist supply port 55 of the pressure head 31 to the external mist supply path outlet 57 is inclined in the direction in which the main shaft 27 moves toward the workpiece 100, and the mist generated by the mist generating means 86 is You may comprise so that it may eccentrically supply along the rotation direction of the main axis | shaft 27 with respect to an internal mist supply path from the external mist supply path exit mentioned above.

  By comprising in this way, it becomes easier to guide mist to the process part of the workpiece | work 100, and the contact part of the drill 45, and can further strengthen the flow of supply of mist.

  (5) In the present embodiment, the pressurized supply path 83 is provided in order to increase the flow rate of the compressed air in the gas supply path 82. However, the present invention is not limited thereto, and the gas supply is performed without providing the pressurized supply path 83. The flow rate of the compressed air in the path 82 may be increased. In other words, when it is determined that the machining portion of the workpiece 100 is clogged with chips, a signal is transmitted from the control device 99 to the flow rate control device (not shown) provided in the gas supply path 82 in S33 of FIG. The flow rate control device that receives the signal may be controlled so that the flow rate of the compressed air is increased until reaching a preset flow rate value. Further, a signal is transmitted from the control device 99 to the pressure control device 87 provided in the gas supply path 82, and the pressure control device 87 that has received the signal increases the pressure of the compressed air until it reaches a preset pressure value. You may control so that.

It is a partial notch side view of the deep hole processing apparatus in one Embodiment of this invention. It is a top view of the deep hole processing apparatus in one Embodiment of this invention. It is a figure which shows the XX cross section of FIG.1 and FIG.2. It is sectional drawing of the pressure head shown in FIG.1 and FIG.2. It is explanatory drawing of the drill shown in FIG. It is explanatory drawing of the delivery path | route of the mist at the time of processing a workpiece | work, and a chip. It is explanatory drawing of the control panel used for the deep hole processing apparatus in one Embodiment of this invention. It is explanatory drawing of the flow control board used for the deep hole processing apparatus in one Embodiment of this invention. It is a flowchart of the deep hole processing in one Embodiment of this invention. 10 is a flowchart of main spindle forward rotation processing in FIG. 9. 10 is a flowchart of main axis positive direction movement processing in FIG. 9. It is a flowchart of the clogging process of FIG. FIG. 10 is a flowchart of spindle reverse direction movement processing in FIG. 9. FIG. 10 is a flowchart of spindle rotation stop processing in FIG. 9. It is sectional drawing of the pressure head of a modification.

Explanation of symbols

27a Chip discharge passage 33 Spindle drive section 57 External mist supply passage outlet 82 Gas supply passage 85 Mist supply passage 86 Mist generating means 87 Pressure control device 88 Pressure gauge 89 Flow meter 92 Solenoid valve 99 Control device

Claims (17)

A deep hole machining device that forms a deep hole in a workpiece by rotating a spindle to which a machining tool is attached toward a machining portion of the workpiece,
Mist generating means for generating mist by mixing gas and lubricating oil;
A mist supply path for supplying the mist generated by the mist generating means to the contact portion between the processing portion of the workpiece and the processing tool;
A deep hole processing apparatus comprising: a gas supply path that supplies gas to the mist supply path. Clogging determination value measuring means for measuring a clogging determination value for determining whether chips generated during processing of deep hole formation are clogged between the processing tool and the workpiece;
Clogging determination means for determining whether the clogging determination value measured by the clogging determination value measuring means has reached a preset threshold;
When the clogging determination means determines that the clogging determination value measured by the clogging determination value measuring means has reached a preset threshold, the flow rate of the gas flowing through the gas supply path is increased. The deep hole processing apparatus according to claim 1, further comprising: a control unit configured to perform control. Flow rate measuring means for measuring the flow rate of the gas flowing through the gas supply path;
Flow rate determination means for determining whether or not the flow rate value measured by the flow rate measurement means is equal to or less than a preset threshold value;
Control means for controlling the flow rate of the gas flowing through the gas supply path to be increased when the flow rate determining means determines that the flow rate value measured by the flow rate measuring means is equal to or less than a preset threshold value. The deep hole processing apparatus according to claim 1, wherein: A flow rate adjusting means for adjusting the flow rate of the gas flowing through the gas supply path;
The control means increases the flow rate of the gas flowing through the gas supply path to a preset flow value when it is determined that the flow value measured by the flow measurement means is equal to or less than a preset threshold value. 4. The deep hole machining apparatus according to claim 3, wherein the flow rate adjusting means is controlled as described above. Pressure measuring means for measuring the pressure of the gas flowing through the gas supply path;
Pressure determining means for determining whether the pressure value measured by the pressure measuring means is greater than or equal to a preset threshold value;
Control means for controlling the flow rate of the gas flowing through the gas supply path to be increased when the pressure determination means determines that the pressure value measured by the pressure measurement means is greater than or equal to a preset threshold value. The deep hole processing apparatus according to claim 1, wherein: Pressure adjusting means for adjusting the pressure of the gas flowing through the gas supply path;
The control means increases the pressure of the gas flowing through the gas supply path to a preset pressure value when it is determined that the pressure value measured by the pressure measurement means is greater than or equal to a preset threshold value. 6. The deep hole machining apparatus according to claim 5, wherein the pressure adjusting means is controlled as described above. A spindle rotating means for rotating the spindle;
Driving force measuring means for measuring the driving force of the spindle rotating means;
Driving force determining means for determining whether the value of the driving force measured by the driving force measuring means is greater than or equal to a preset threshold value;
When the driving force determining means determines that the value of the driving force measured by the driving force measuring means is greater than or equal to a preset threshold value, the flow rate of the gas flowing through the gas supply path is increased. The deep hole machining apparatus according to claim 1, further comprising a control unit that controls the deep hole machining apparatus. Workpiece temperature measuring means for measuring the temperature of the workpiece;
A workpiece temperature determining means for determining whether the value of the workpiece temperature measured by the workpiece temperature measuring means is equal to or greater than a preset threshold;
When the workpiece temperature determining means determines that the temperature of the workpiece measured by the workpiece temperature measuring means is equal to or higher than a preset threshold, control is performed to increase the flow rate of the gas flowing through the gas supply path. The deep hole processing apparatus according to claim 1, further comprising: Processing tool temperature measuring means for measuring the temperature of the processing tool;
Processing tool temperature determination means for determining whether the value of the temperature of the processing tool measured by the processing tool temperature measurement means is equal to or greater than a preset threshold value;
When the work tool temperature determination means determines that the temperature of the workpiece measured by the work tool temperature measurement means is equal to or higher than a preset threshold, the flow rate of the gas flowing through the gas supply path is increased. The deep hole processing apparatus according to claim 1, further comprising: Chip temperature measuring means for measuring the temperature of chips generated during deep hole formation;
Chip temperature determining means for determining whether the chip temperature measured by the chip temperature measuring means is equal to or higher than a preset threshold;
When the chip temperature determining unit determines that the chip temperature measured by the chip temperature measuring unit is equal to or higher than a preset threshold value, control is performed to increase the flow rate of the gas flowing through the gas supply path. The deep hole processing apparatus according to claim 1, further comprising: Flow rate measuring means for measuring the flow rate of the gas flowing through the gas supply path;
Flow rate adjusting means for adjusting the flow rate of the gas flowing through the gas supply path,
The said control means controls the said flow volume adjustment means so that the flow volume of the gas which flows through the said gas supply path may be increased to the preset flow rate value, The said any one of Claim 7, 7-10 characterized by the above-mentioned. Deep hole processing equipment. Pressure measuring means for measuring the pressure of the gas flowing through the gas supply path;
Pressure adjusting means for adjusting the pressure of the gas flowing through the gas supply path,
The said control means controls the said pressure adjustment means so that the pressure of the gas which flows through the said gas supply path may be increased to the preset pressure value, The said any one of Claims 7 to 10 characterized by the above-mentioned. Deep hole processing equipment. A recovery path for recovering the lubricating oil that constitutes the mist supplied from the mist supplied from the chips generated during the deep hole forming process, and
The mist supply path is provided inside the main shaft,
The deep hole machining apparatus according to claim 1, wherein the recovery path is provided on an outer peripheral surface of the main shaft. A recovery path for recovering the lubricating oil constituting the mist supplied from the mist supplied from the chips generated during the deep hole forming process, and
The deep hole machining apparatus according to claim 1, wherein the recovery path is provided inside the main shaft.   The deep hole machining apparatus according to claim 1, wherein the mist supply path is provided on an outer peripheral surface of the main shaft. The mist supply path is
An external mist supply path from the mist generating means to the vicinity of the main shaft;
An internal mist supply path that communicates with the external mist supply path and that reaches from the outlet of the external mist supply path to the processing tool attached to the spindle,
The mist generated by the mist generating means is supplied while being inclined from the outlet of the external mist supply path to the internal mist supply path in a direction in which the main shaft moves toward the workpiece processing portion. The deep hole processing apparatus according to claim 15. The mist supply path is
An external mist supply path from the mist generating means to the vicinity of the main shaft;
An internal mist supply path that communicates with the external mist supply path and that reaches from the outlet of the external mist supply path to the processing tool attached to the spindle,
The mist generated by the mist generating means is supplied eccentrically along the rotational direction of the main shaft from the outlet of the external mist supply path to the internal mist supply path. Deep hole processing equipment.

Images