JP2017113855A - BTA deep hole processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a BTA deep hole processing machine capable of sufficiently achieving a sealing effect of a seal part, even when fastening force applied by a fastening tool is small.SOLUTION: The BTA deep hole processing machine comprises: a cylindrical tool in the inside of which a flow channel extending to a region on one side from an end on the other side is formed; a tool rotating mechanism which supports at least a part of the one side of the tool and causes the tool to rotate around its axial line; a headstock which supports the tool rotating mechanism; a headstock moving mechanism which causes the headstock to move in an axial line direction of the tool; a cutting fluid supply device which, during processing of a workpiece, supplies cutting fluid between a surface to be cut of the workpiece and the tool, and causes the cutting fluid to reflux from the end of the other side of the tool to the region of the one side via the flow channel; a seal part abutting on the other side of the workpiece; a mobile body which supports the seal part; a mobile body moving mechanism which causes the mobile body to move in the axial line direction of the tool; and a fixing tool which fixes the mobile body so that movement of the mobile body by the mobile body moving mechanism is inhibited.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a BTA deep hole processing machine that performs deep hole processing.

  Conventionally, a deep hole processing machine called a BTA deep hole processing machine has been widely used. The name of BTA is the Boring & Trepanning Association (BTA) once formed between Germany, the UK, France, Sweden and the United States, striving to standardize tool standards and working conditions, and exchange technical information with each other. This comes from the enlightenment aimed at further development of the method. Specifically, the BTA deep hole processing machine processes a workpiece with a cylindrical drill (also referred to as a boring bar) in which a flow path is formed. In machining, high-pressure cutting fluid is supplied between the outer peripheral surface of the drill and the work surface of the workpiece. The cutting fluid has a function of cooling the drill, a function of lubricating a cutting point, and the like in addition to a function of discharging generated chips through a flow path formed inside the drill.

  There are two types of workpiece installation methods using a BTA deep hole processing machine. There are a method of fixing the work with a chuck so that the work is rotated concentrically with the tool, and a method of placing the work on a table. The latter method has a higher degree of freedom in the shape of the workpiece. In the latter method, a plurality of deep holes can be machined by setting a plurality of workpieces in parallel and moving the table along a plane perpendicular to the axial direction of the tool. it can.

  As a specific method for placing the work on the table, a method using a pair of V blocks installed on the table is common. In this case, the work is placed on the pair of V blocks, and the work is fastened and fixed from above the pair of V blocks by a fastener such as a bolt.

Japanese Patent Publication No. 7-4689

  When placing a workpiece on the table, when machining a through hole, the tool penetrates the workpiece to prevent high pressure cutting fluid from splashing and contaminating the surrounding area when the tool penetrates the workpiece. The seal member is previously placed in liquid-tight contact with the workpiece so as to cover the position to be performed.

  Specifically, as disclosed in Japanese Patent Publication No. 7-4689 (Patent Document 1), the work stopper means (8) presses the pressing member (83), which is a seal member, against the work (W). Thus, when the tool (4) penetrates the workpiece (W), high-pressure cutting fluid is prevented from being scattered and soiling the surroundings (see FIG. 7).

  Here, if the fastening force of the fastener is increased too much in order to firmly fix the workpiece, the workpiece may be deformed.

  On the other hand, if the tightening force by the fastener is small, the workpiece may move before processing due to the pressing force (held at a constant value) to the workpiece by the seal portion. In order to prevent this, it is necessary to suppress the pressing force to such a small value that the workpiece does not move. In some cases, there is a problem that the sealing effect of the seal portion is not sufficient.

  In view of the above problems, the present invention provides a BTA deep hole drilling machine capable of sufficiently realizing the sealing effect of the seal portion even when the tightening force by the fastener is small. Let it be an issue.

  The present invention relates to a cylindrical tool in which a flow path disposed on one side of a workpiece and extending from an end on the other side to a region on one side is formed, and at least one of the one side of the tool. A tool rotating mechanism that supports the tool and rotates the tool about its axis, a head stock that supports the tool rotating mechanism, a head stock moving mechanism that moves the head stock in the axial direction of the tool, and the workpiece During the machining, a cutting fluid is supplied between the work surface of the workpiece and the tool, and the cutting fluid is passed from the end on the other side of the tool to the region on the one side through the flow path. A cutting fluid supply device to be circulated, a seal portion that is in contact with the other side of the workpiece, a moving body that supports the seal portion, and a moving body moving mechanism that moves the moving body in the axial direction of the tool; The movement of the moving body by the moving body moving mechanism A BTA deep hole drilling machine, characterized in that it and a fixture for fixing the movable body so as to prohibit (disable reduction).

  According to the present invention, prior to deep hole machining of a workpiece, after the movable body is moved to a predetermined position together with the seal portion, the movable body can be fixed with any sufficient strength by the fixing tool. For this reason, even if it is a case where the clamping force by the fastener with respect to a workpiece | work is small, the sealing effect of a seal part is fully realizable.

  Preferably, the moving body moving mechanism includes a rail member that extends in the axial direction of the tool and is supported so that the moving body can move, a support portion that supports the rail member, and the moving body with respect to the support portion. And a drive mechanism for moving the motor along the rail member.

  With such a moving body moving mechanism, the moving body can be moved quickly and accurately in the axial direction of the tool.

  Preferably, the fixture is a clamp member that clamps and fixes the movable body to the support. In this case, the moving body can be easily and reliably fixed to the support portion.

It is a schematic front view of the BTA deep hole processing machine of one embodiment of the present invention. It is a schematic front view which shows the mobile body and seal part periphery of the BTA deep hole processing machine of FIG. It is a schematic side view of the periphery of a moving body and a seal part when the BTA deep hole processing machine of FIG. 1 is viewed from the left. It is a schematic sectional drawing of the clamp member provided in the BTA deep hole processing machine of FIG. It is a schematic side view which shows the modification of the moving body and clamp member which can be employ | adopted as the BTA deep hole processing machine of FIG. It is a schematic side view which shows the other modification of the moving body and clamp member which can be employ | adopted as the BTA deep hole processing machine of FIG. It is a schematic front view which shows the seal | sticker part and workpiece | work periphery of the conventional BTA deep hole processing machine.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic front view of a BTA deep hole processing machine 100 according to an embodiment of the present invention, and FIG. 2 is a schematic view showing the periphery of a moving body 41 and a seal portion 40 of the BTA deep hole processing machine 100 of FIG. FIG. 3 is a front view, and FIG. 3 is a schematic side view of the periphery of the moving body 41 and the seal portion 40 when the BTA deep hole processing machine 100 of FIG. 1 is viewed from the left.

  As shown in FIG. 1, the BTA deep hole processing machine 100 includes a processing machine 200 and a control device 300 that controls the processing machine 200.

  The processing machine 200 according to the present embodiment is disposed on one side (the right side in FIG. 1) of an installation position of a workpiece W (a method for installing the workpiece W will be described later) that is an object of deep hole machining, and the other A flow path (not shown) extending from an end portion (left side in FIG. 1) to an area on one side (for example, an end portion on one side, but not necessarily an end portion). Has a cylindrical tool 10 formed inside. Further, the processing machine 200 according to the present embodiment supports a tool rotating mechanism 11 that supports at least a part of one side of the tool 10 and rotates the tool 10 around its axis, and a spindle that supports the tool rotating mechanism 11. A platform 20 and a spindle stock moving mechanism 21 that moves the spindle stock 20 in the axial direction of the tool 10 are provided.

  Furthermore, the processing machine 200 according to the present embodiment supplies cutting fluid between the work surface of the workpiece W and the tool 10 during processing, and supplies the cutting fluid to the other side of the tool 10 through the flow path. And a cutting fluid supply device 30 that circulates from the end portion to the region on one side. The cutting fluid supply device 30 of the present embodiment includes a cylindrical internal hole (not shown) that is penetrated by the tool 10 and a cutting fluid supply port that is exposed from the internal hole to the lower outer surface of the cutting fluid supply device 30. (Not shown), and can contact one side of the workpiece W (the right side in FIG. 1 and the back side in FIG. 3) and can move in the axial direction of the tool 10. A pressure table 31 is provided.

  Further, as shown in FIGS. 1 to 3, the processing machine 200 of the present embodiment is applied to the other side of the workpiece W (left side in FIG. 1, right side in FIG. 2, front side in FIG. 3). The sealing part 40 to be contacted, the moving body 41 that supports the sealing part 40, and the movement that moves the moving body 41 in the axial direction of the tool 10 (the left-right direction in FIGS. 1 and 2 and the depth direction in FIG. 3). A body movement mechanism.

  As shown in FIGS. 2 and 3, the moving body 41 of the present embodiment includes a columnar portion 42 that supports the seal portion 40 on one side, and a rectangular base 43 that supports the columnar portion 42 in a front view. And a moving body moving mechanism fixed to the bottom surface of the pedestal 43 (the lower surface in FIGS. 1 to 3).

  The moving body moving mechanisms of the present embodiment are linear guides (linear motion guides) 45a and 45b, and are provided at two positions on the lower surface of the pedestal 43 with a predetermined interval as shown in FIG.

  Moreover, as shown in FIGS. 1 to 3, the processing machine 200 of the present embodiment is supported on a bed 80. As shown in detail in FIG. 3 in particular, the bed 80 has a rectangular parallelepiped main body 83 and 2 provided in parallel to the axial direction of the tool 10 at a predetermined interval on the upper surface of the main body 83. Between the two rails 81a and 81b, the overhanging portions 82a and 82b projecting horizontally on the upper sides of both sides (left and right sides in FIG. 3) in the axial direction, and the two rails 81a and 81b. And a plate 84 extending in the axial direction and rising vertically upward.

  The two linear guides 45a and 45b described above move along each of the two rails 81a and 81b to move the moving body 41 in the axial direction of the tool 10 (the arrow direction in FIG. 2). Yes. In FIG. 2, the moving body 41 before moving is indicated by a broken line, and the moving body 41 after moving is indicated by a solid line.

  Further, as shown in FIGS. 1 to 3, the processing machine 200 of the present embodiment includes a hydraulic clamp member 60 (described in detail later) that clamps and fixes the moving body 41 to the bed 80. ing. The clamp member 60 is fixed to the bottom surface of the moving body 41 between the two linear guides 45a and 45b. The plate 84 fixed to the bed 80 is clamped to fix the moving body 41 to the bed 80. It can be fixed against.

  Moreover, as shown in FIG. 1, the control apparatus 300 of this Embodiment has the control means 50 which controls the linear guides 45a and 45b.

  FIG. 4 is a schematic cross-sectional view of the clamp member 60 provided in the BTA deep hole processing machine 100 of FIG. As shown in FIG. 4, the clamp member 60 of the present embodiment has a pair of cylinders 61a and 61b connected by a connecting portion 62, and has a U-shaped cross section as a whole. The clamp member 60 is fixed to the bottom surface of the moving body 41 between the two linear guides 45a and 45b so that the pair of cylinders 61a and 61b sandwich the plate 84 (see FIGS. 1 to 3). Inside each of the cylinders 61a and 61b, pressure oil as a working fluid and pistons 63a and 63b that can move in the cylinders 61a and 61b by pressure applied to the pressure oil are provided. Each piston 63a, 63b has pressing portions 64a, 64b on the side facing the plate 84. The pressing portions 64a and 64b protrude from openings provided on the sides of the cylinders 61a and 61b facing the plate 84 so that the plate 84 is clamped from both the left and right sides when pressure is applied to the pressure oil. It has become.

  Further, as shown in FIG. 4, each of the two regions surrounded by the cylinders 61a and 61b and the pistons 63a and 63b is divided into a pressure oil flow control valve (solenoid) by a first oil passage 66 and a second oil passage 67. Valve) 65, a pump 68 for pressurizing the pressure oil, and a tank 69 for storing the pressure oil. When the plate 84 is clamped by the pistons 63a and 63b, pressure oil is supplied into the cylinders 61a and 61b via the first oil passage 66. At the time of unclamping, the pressure oil is supplied to the second oil passage 67. In addition, in FIG. 4, the illustration about the detail of the connection part of the oil paths 66 and 67 and cylinder 61a, 61b is abbreviate | omitted.

  Next, the operation of the BTA deep hole processing machine 100 of the present embodiment will be described.

  First, the workpiece W is installed between the seal unit 40 and the pressure table 31. In the present embodiment, the workpiece W is placed on a V block (not shown) placed on the table in order to prevent displacement of the tool 10 from the axial direction.

  Next, the moving body 41 (seal part 40) and the pressure table 31 are moved together toward the workpiece W by the linear guides 45 a and 45 b and the pressure table moving mechanism 70. At this time, the pistons 63 a and 63 b do not clamp the plate 84. That is, the moving body 41 is movable in the axial direction of the tool 10 by the linear guides 45a and 45b. And the workpiece | work W is clamped by the seal part 40 and the pressure stand 31, and the positioning before the process of the workpiece | work W in the axial direction of the tool 10 is completed.

  In this state, the pressure oil is supplied to the region between the cylinders 61a and 61b and the pistons 63a and 63b through the first oil passage 66. Accordingly, the plate 84 is clamped by the pistons 63a and 63b, and the moving body 41 is prohibited from moving with respect to the bed 80 by the frictional force acting between the plate 84 and the pressing portions 64a and 64b. That is, the moving body 41 is fixed to the bed 80.

  From this state, deep hole machining is started. That is, the tool 10 is rotated about its axis by the tool rotation mechanism 11 and the head stock moving mechanism 21 is activated to move the head stock 20 toward the other side. That is, the tool 10 is moved toward the workpiece W. When the rotating tool 10 contacts the workpiece W, deep hole machining for the workpiece W is started. Prior to the contact between the tool 10 and the workpiece W, the cutting fluid supply device 30 supplies a high-pressure cutting fluid between the tool 10 and the work surface of the workpiece W. The cutting fluid is supplied to an internal hole (not shown) of the pressure table 31, flows through the internal hole, and flows between the tool 10 and the work surface of the workpiece W. The cutting fluid has a function of cooling the tool 10. Further, the cutting fluid extrudes (discharges) the chips generated by the processing, and a region (for example, one side) of the tool 10 through a flow path (not shown) formed inside the tool 10. It is discharged to a discharge port (not shown) provided at the end of this side.

  During the deep hole machining of the workpiece W, the workpiece W is given a pressing force from one side to the other side by the tool 10 or the like. The pressing force is affected not only by the resistance due to machining depending on the material characteristics of the workpiece W and the force caused by the tool 10 due to the feed speed of the tool 10 to the workpiece W, but also by the force from the pressure table 31 and the force due to the high-pressure cutting fluid To do.

  However, in the present embodiment, since the moving body 41 is clamped and fixed to the bed 80 by the clamp member 60, the workpiece W is moved from one side during the deep hole processing even by the above pressing force. It is not moved towards the other side. That is, the stationary state of the workpiece W is maintained during deep hole machining.

  According to the present embodiment as described above, the movable body 41 is moved to a predetermined position together with the seal portion 40 prior to the deep hole machining of the workpiece W, and then the movable body 41 is clamped with respect to the bed 80. The member 60 can be clamped and fixed. For this reason, even if it is a case where the fastening force with the fastener with respect to the workpiece | work W is small, the workpiece | work W does not move before a process, but the sealing effect of the seal part 40 can fully be implement | achieved. Further, by using the clamp member 60, the moving body 41 can be easily and reliably fixed to the bed 80.

  The linear guides 45 a and 45 b are provided on the bed 80 and move the moving body 41 along rails 81 a and 81 b extending in the axial direction of the tool 10. For this reason, the linear guides 45 a and 45 b can move the moving body 41 quickly and accurately in the axial direction of the tool 10.

  In the present embodiment, the clamp member 60 is fixed to the bottom surface of the moving body 41 and clamps the plate 84 that rises vertically from the top surface of the bed 80. However, the present invention is limited to such a configuration. Absent.

  For example, FIG. 5 is a schematic side view showing a modified example of the movable body 441 and the clamp members 460a and 460b that can be employed in the BTA deep hole processing machine 100 of FIG. 5, components similar to those of the BTA deep hole processing machine 100 of the present embodiment shown in FIGS. 1 to 4 are denoted by substantially the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the clamp members 460 a and 460 b of this modified example sandwich two projecting portions 482 a and 482 b in which a pair of cylinders project in the horizontal direction (left-right direction in FIG. 5) above the bed 480. Thus, the movable body 441 is fixed on both sides. Also in this modified example, when the positioning of the workpiece in the axial direction of the tool is completed, the clamp members 460a and 460b are controlled to clamp the overhang portions 482a and 482b by a hydraulic control device (not shown). Then, the moving body 441 is fixed with respect to the bed 480.

  Or the other modification of the moving body and clamp member which can be employ | adopted as the BTA deep hole processing machine 100 of FIG. 1 is shown by FIG. 6, and has the following structures. That is, in this modification, the moving body 541 has a rod 584 extending vertically downward fixed to the bottom surface, and the bed 580 has a groove 586 extending in the axial direction of the tool on the top surface and the top surface of the bed 580. And a top plate 587 for covering.

  As shown in FIG. 6, the top plate 587 has a slit 588 wider than the diameter of the rod 584 extending in the axial direction of the tool. The rod 584 extends through the slit 588 into the groove 586. . A clamp member 560 is fixed to the lower end of the rod 584. Specifically, the clamp member 560 of this modified example is fixed to the lower end of the rod 585, and can be slid within the cylinder 561 open at the top, and a flange-shaped pressing portion 564 on the top. And a provided piston 563. Although not shown, the clamp member 560 is connected to the hydraulic control device via an appropriate oil passage. In FIG. 6, the same components as those of the BTA deep hole machining machine 100 of the present embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this modified example, when the positioning of the workpiece in the axial direction of the tool is completed before the machining, the piston 563 of the clamp member 560 is moved upward by the hydraulic control device, and the pressing portion 564 of the piston 563 is moved to the top plate 585. Pressed against the bottom surface. That is, the movement of the moving body 541 relative to the bed 580 is prohibited by the frictional force acting between the upper surface of the pressing portion 564 and the lower surface of the top plate 583. That is, the moving body 541 is fixed to the bed 580.

DESCRIPTION OF SYMBOLS 10 Tool 11 Tool rotation mechanism 20 Head stock 21 Main stock movement mechanism 30 Cutting fluid supply device 31 Pressure stand 40 Sealing part 41 Moving body 42 Column-shaped part 43 Base 45 Linear guide 50 Control means 60 Clamp members 61a and 61b Cylinder 62 Connection part 63a, 63b Piston 64a, 64b Pressing part 65 Flow path control valve (solenoid valve)
66 Oil passage 67 Oil passage 68 Pump 69 Tank 70 Pressure stand moving mechanism 80 Bed 81a, 81b Rail 82a, 82b Overhang portion 83 Main body portion 100 BTA deep hole processing machine 200 Processing machine 300 Control device 440 Seal portion 441 Moving body 442 Circle Column part 443 Base 445a, 445b Linear guide 460a, 460b Clamp member 480 Bed 481a, 481b Rail 482a, 482b Overhang part 483 Body part 540 Seal part 541 Moving body 542 Columnar part 543 Base 545a, 545b Linear guide 560 Clamp member 561 Cylinder 563 Piston 564 Press part 580 Bed 581a, 581b Rail 583 Body part 585 Rod 586 Groove 587 Top plate 588 Slit 4 Tool 7 Work clamp means 8 Stopper means 83 Press member W Work

Claims (3)

A cylindrical tool in which a flow path disposed on one side of the workpiece and extending from an end on the other side to a region on one side is formed;
A tool rotation mechanism that supports at least a part of one side of the tool and rotates the tool around its axis;
A headstock for supporting the tool rotation mechanism;
A head stock moving mechanism for moving the head stock in the axial direction of the tool;
During machining of the workpiece, a cutting fluid is supplied between the work surface of the workpiece and the tool, and the cutting fluid is supplied from the other end of the tool to the region on the one side via the flow path. A cutting fluid supply device for refluxing
A seal portion in contact with the other side of the workpiece;
A moving body that supports the seal part;
A moving body moving mechanism for moving the moving body in the axial direction of the tool;
A fixture for fixing the moving body so as to prohibit the movement of the moving body by the moving body moving mechanism;
A BTA deep hole processing machine characterized by comprising: The moving body moving mechanism includes a rail member that extends in the axial direction of a tool and is supported so that the moving body can move.
A support portion for supporting the rail member;
A drive mechanism for moving the movable body along the rail member with respect to the support portion;
The BTA deep hole processing machine according to claim 1, wherein: The BTA deep hole processing machine according to claim 2, wherein the fixture is a clamp member that clamps and fixes the movable body to the support portion.

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