JP6405115B2 - Drilling method, cylinder block manufacturing method, and drilling machine - Google Patents

Description

  The present invention relates to a hole machining method, a cylinder block manufacturing method, and a hole drilling machine for machining a straight hole and a non-straight hole, respectively, by cutting a workpiece.

  2. Description of the Related Art Conventionally, a drilling machine that performs drilling at a plurality of positions simultaneously on a workpiece is known. For example, the following Patent Document 1 discloses a hole machining including a machining head (multi-axis machining unit) that holds a machining tool (rotary tool) such as a plurality of drills in an arrangement corresponding to a hole position to be machined in a workpiece. A machine (unit exchangeable machine tool) is disclosed.

JP 2006-11512 A

  However, in the hole drilling machine disclosed in Patent Document 1, a plurality of processing tools for performing processing with different processing accuracy and types are not held by a common processing head, and processing tools for performing the same type of processing are shared. In order to perform processing while being held by this processing head, when processing with different processing accuracy and types is performed on the workpiece, there is a problem in that the processing head needs to be replaced and the processing accuracy is lowered. Moreover, in the hole drilling machine shown by the said patent document 1, the case where a straight hole with a fixed hole diameter and a non-straight hole with which a hole diameter changes is processed with respect to a to-be-processed object is not assumed. There was a problem that the holes could not be machined with high precision and in a short time.

  The present invention has been made to cope with the above problems, and its object is to provide a hole machining method and a cylinder block capable of machining straight holes and non-straight holes in a workpiece with high accuracy and in a short time. A manufacturing method and a hole drilling machine are provided.

In order to achieve the above object, the present invention is characterized by a straight hole machining tool for machining a straight hole having a constant hole diameter in a workpiece, and a non-straight hole for machining a non-straight hole in which the hole diameter varies in the workpiece. A U-axis displacement machining tool that holds the cutter in the U-axis direction, which is the radial direction of the hole, and a straight hole machining tool and a U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively. A machining head to be held, a Z-axis drive motor for displacing the machining head in the Z-axis direction close to or away from the workpiece, and a U-axis drive motor for displacing a blade in the U-axis displacement machining tool in the U-axis direction , A tool rotation drive prime mover that rotates each of a straight hole machining tool and a U axis displacement machining tool, a Z axis drive prime mover, a U axis drive prime mover, and a tool rotation drive prime mover The U-axis displacement machining tool has a bar-like arm part, and the arm part has a blade at the tip, and the blade is a non-straight hole. hole cutter is used hole drilling machine that has been formed by a length which is located outside from the opening of the straight hole in the surface of the workpiece with a straight hole processing tool when located at the end of the rear side of a processing method, the control unit, and a straight hole processing step of processing a straight hole to the machining head straight hole working tool while being rotated is brought closer to the workpiece the workpiece, the straight hole processing When brought close to the processing head tool having the same straight hole drilling tool while a rotationally driven tool in a state of being positioned outside than the opening of the straight hole in the surface of the workpiece to the workpiece DOO Is to be executed and a non-straight hole processing step of processing the non-straight bore a tool having the U-axis displacement working tool in the workpiece is displaced in the U-axis direction.

  According to the feature of the present invention configured as described above, the hole drilling method includes a straight hole machining step for machining a straight hole in a workpiece and a non-straight hole machining step for machining a non-straight hole in the workpiece. Since the machining head that holds the straight hole machining tool for machining holes and the U-axis displacement machining tool for machining non-straight holes is used, the straight holes and non-straight holes can be machined with high accuracy and in a short time. it can.

Another feature of the present invention is that, in the hole machining method, the U-axis displacement machining tool includes a blade for machining a straight hole in addition to the blade, and the straight hole machining step includes the U-axis displacement machining tool. is intended to perform a straight hole with a knife for straight hole having the non-straight hole working process is in Rukoto be processed non-straight hole in the same hole as the straight bore that U-axis displacement machining tool for machining .

In this case, in the hole drilling method, the U-axis displacement machining tool is provided in a state in which the blade projects to the workpiece side with respect to the tip portion of the straight hole machining tool. It can be carried out before or after the drilling step. According to this, the hole machining method is provided in a state in which the cutter of the U-axis machining tool projects to the workpiece side with respect to the tip of the straight hole machining tool, and the non-straight hole machining process is a straight hole machining process. Performed before or after the process. In other words, since the non-straight hole drilling process and the straight hole drilling process are not processed at the same time, the hole drilling method can suppress adverse effects on the machining accuracy due to vibrations and variations in the hole machining position that occur during each machining. Accuracy can be improved. The hole machining method according to the present invention can simultaneously perform the non-straight hole machining process and the straight hole machining process. In this case, the non-straight hole and the straight hole can be machined in a short time.

  Further, the present invention can be implemented not only as an invention of a hole processing method but also as an invention of a cylinder block manufacturing method and a hole processing machine using this hole processing method.

Specifically, the cylinder block manufacturing method includes a straight hole machining tool for machining a straight hole having a constant hole diameter in a workpiece, and a non-straight hole for machining a non-straight hole in which the hole diameter varies in the workpiece. U-axis displacement machining tool that holds the cutter in the U-axis direction, which is the radial direction of the tool, and holds the straight hole machining tool and U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively. A machining head, a Z-axis driving motor that displaces the machining head in the Z-axis direction close to or away from the workpiece, a U-axis driving motor that displaces a blade in the U-axis displacement machining tool in the U-axis direction, A tool rotation drive motor that rotates and drives a straight hole machining tool and a U-axis displacement machining tool, a Z-axis drive motor, a U-axis drive motor, and a tool rotation drive motor The U-axis displacement machining tool has a bar-like arm part, and the arm part has a blade at the tip, and the blade has a non-straight hole. cylinder blade having a straight hole processing tool when located at the end of the rear side using a hole drilling machine that has been formed by a length which is located outside from the opening of the straight hole in the surface of the workpiece in A method of manufacturing a block, in which a straight hole machining process is performed in which a machining head is brought close to a cylinder block while a straight hole machining tool is driven to rotate in a control unit, and a straight hole is machined in the cylinder block. pressurized in a state in which a blade having the same straight hole drilling tool while the tool is rotated is located outside from the opening of the straight hole in the surface of the workpiece The head may be a knife having the U-axis displacement machining tool causes closer to the cylinder block so as to execute a non-straight hole processing step of processing the non-straight hole in the cylinder block is displaced in the U-axis direction.

Further, the hole drilling machine is a radial direction of the non-straight hole for machining a straight hole machining tool for machining a straight hole with a constant hole diameter in the workpiece and a non-straight hole whose hole diameter varies in the workpiece. A U-axis displacement machining tool that holds the cutter movably in the U-axis direction, a machining head that holds the straight hole machining tool and the U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively; A Z-axis driving motor for displacing the machining head in the Z-axis direction close to or away from the workpiece; a U-axis driving motor for displacing a blade in the U-axis displacement machining tool in the U-axis; a straight hole machining tool; Each operation of the tool rotation drive prime mover that rotates each U-axis displacement machining tool, the Z axis drive prime mover, the U axis drive prime mover, and the tool rotation drive prime mover is controlled. The U-axis displacement machining tool has a bar-like arm part, and the arm part has a blade at the tip, and the edge of the non-straight hole is the back end of the non-straight hole. Is formed in such a length that the cutter of the straight hole machining tool is positioned outside the opening of the straight hole on the surface of the workpiece, and the control unit The workpiece is moved closer to the workpiece while being positioned outside the opening of the straight hole on the surface of the workpiece, and the cutter included in the U-axis displacement machining tool is displaced in the U-axis direction. it may be set to so that to execute a non-straight hole processing step of processing the non-straight hole to.

In this case, in the hole drilling machine, the U-axis displacement machining tool is provided with a blade for machining a straight hole in addition to the blade, and the control unit is a blade for a straight hole provided in the U-axis displacement machining tool. The straight hole may be formed by using a non-straight hole in the same hole as the straight hole processed by the U-axis displacement machining tool. Further, in this case, in the hole drilling machine, the U-axis displacement machining tool may be provided in a state in which the blade projects to the workpiece side with respect to the tip portion of the straight hole machining tool . According to these, the cylinder block manufacturing method and the hole drilling machine using the hole drilling method can expect the same effects as the hole drilling method.

It is side surface sectional drawing which showed typically the structure of the processing head of the hole drilling machine which concerns on one Embodiment of this invention. FIG. 2 is a block diagram of a control system for controlling the operation of the hole drilling machine shown in FIG. 1. It is side surface sectional drawing which showed typically the state which processes a straight hole in a workpiece by the processing head in the hole processing machine shown in FIG. It is side surface sectional drawing which showed typically the state just before the process head in the hole processing machine shown in FIG. 1 finished the process of a straight hole with respect to a workpiece, and processed a non-straight hole. It is side surface sectional drawing which showed typically the state which processes a non-straight hole in a workpiece by the processing head in the hole processing machine shown in FIG. It is the flowchart which showed the flow of each process process of the straight hole and non-straight hole which the control part shown in FIG. 2 performs.

(Configuration of hole processing machine 100)
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of a drilling method, a cylinder block manufacturing method, and a drilling machine according to the present invention will be described with reference to the drawings. FIG. 1 is a side cross-sectional view schematically showing a configuration of a main part of a hole drilling machine 100 used in a hole drilling method and a cylinder block manufacturing method according to the present invention. FIG. 2 is a block diagram of a control system for controlling the operation of the hole drilling machine 100. Note that the drawings referred to in this specification are schematically shown by exaggerating some of the components in order to facilitate understanding of the present invention. For this reason, the dimension, ratio, etc. between each component may differ. The hole processing machine 100 is a machine tool that processes the straight holes SH1 to SH3 and the non-straight hole NSH on the surface of the workpiece WK by computer control (NC control). In this embodiment, the cylinder block in the reciprocating engine is a workpiece WK.

  The hole processing machine 100 includes a processing head 101. The machining head 101 is a mechanical device that holds a machining tool that performs a cutting process on the workpiece WK in a state where it can be rotationally driven. As the machining tool, two straight hole machining tools 110 and 120 and one U-axis displacement are provided. A processing tool 130 is provided, and a rotation drive mechanism 150 and a U-axis drive mechanism 160 are provided in the metal casing 102, respectively. The machining head 101 is supported by a support member (not shown) in the hole drilling machine 100 in a state in which the machining head 101 can be displaced in the Z-axis direction, which is a direction approaching or separating from the workpiece WK. In this case, a Z-axis drive motor 103 that generates a driving force for displacing the machining head 101 in the Z-axis direction is connected to the machining head 101.

  The two straight hole machining tools 110 and 120 are tools for machining straight holes SH1 and SH2 having a constant hole diameter in the workpiece WK, respectively, and one end of spindles 111 and 121 in which metal materials are formed in a rod shape. The metal cutting blades 112 and 122 are attached to the part, and the driven gears 113 and 123 are attached to the other end part. These straight hole machining tools 110 and 120 protrude from the housing 102 so that the blades 112 and 122 attached to the spindles 111 and 121 respectively face the workpiece WK, and are exposed to the other of the spindles 111 and 121. The driven gears 113 and 123 respectively provided at the end portions of the motor are held by the housing 102 in a state where the driven gears 113 and 123 are respectively connected to the rotation driving mechanism 150.

In this case, the straight hole machining tools 110 and 120 are held by the machining head 101 at positions corresponding to the formation positions of the straight holes SH1 and SH2 formed in the workpiece WK. Further, the straight hole machining tool 110 and the straight hole machining tool 120 are configured so that the spindles 111 and 121 correspond to the respective hole diameters of the straight holes SH1 and SH2 in order to machine the straight holes SH1 and SH2 having different diameters. They are formed with different thicknesses.

The U-axis displacement machining tool 130 is a tool for machining a non-straight hole NSH whose hole diameter changes in the workpiece WK and a straight hole SH3 whose hole diameter is constant, and mainly includes a spindle body 131, a holder base 133, a movable A holder 134 and a fixed holder 136 are provided. Among these, the spindle main body 131 is a component that is rotationally driven by the rotational drive mechanism 150 while holding the holder base 133, and is configured of a metal cylinder. The spindle body 131 is configured such that a holder base 133 is attached to one end and a driven gear 132 is attached to the other end. Further, a draw bar 141 and a cam bar 142 pass through the spindle body 131, respectively.

  The holder base 133 is a component that holds the movable holder 134 and the fixed holder 136, and is formed of a metal cylinder. More specifically, the holder base 133 holds the movable holder 134 in a slidable displacement state in the U-axis direction orthogonal to the axial direction of the spindle body 131 and holds the fixed holder 136 in an immobile fixed state. . In addition, the holder base 133 accommodates a part of the cam bar 142 and the movable holder 134, respectively.

  The movable holder 134 is a metal part that holds a cutting tool 135 for cutting a non-straight hole NSH whose hole diameter changes in the workpiece WK. More specifically, the movable holder 134 is a workpiece. The WK side extends in a rod shape to form an arm portion 134a, and a cutting tool 135 for metal cutting is attached to the distal end portion of the arm portion 134a. In this case, the arm part 134a is located at a position where the cutters 112, 122, 137 are separated from the surface of the workpiece WK when the cutter 135 is positioned at the end of the non-straight hole NSH, in other words, a straight hole. It is formed with a length located outside the openings SH1 to SH3.

In addition, the movable holder 134 has a base portion of the arm portion 134a fitted into the holder base 133 so as to be slidable along the U-axis direction, and the cam bar 142 of the movable holder 134 is located on the inner side of the movable holder 134 from this portion. A driven portion 134b is formed to be slidably fitted to the driven portion 134b. In this case, as shown in FIGS. 3 to 5, in the driven portion 134 b, a cam groove (not shown) that is slidably fitted to the uneven cam protrusion 143 formed on the cam bar 142 extends in an oblique direction intersecting the U-axis direction. Is formed. On the other hand, the fixed holder 136 is a metal part that holds a blade 137 for cutting a straight hole SH3 having a constant hole diameter in the workpiece WK, and is directed from the tip of the holder base 133 toward the workpiece WK. It extends in a bar shape.

  The draw bar 141 is a part for moving the cam bar 142 back and forth in the Z-axis direction, which is a direction to approach or separate from the workpiece WK, and is configured by forming a metal material in a bar shape. The draw bar 141 has one end connected to the cam bar 142 in the spindle body 131 and the other end held by the U-axis drive mechanism 160.

  The cam bar 142 is a component for displacing the movable holder 134 in the U-axis direction, which is the radial direction of the non-straight hole NSH, and is configured by forming a metal material into a rod shape. One end of the cam bar 142 is slidably fitted to the movable holder 134 in the holder base 133 and the other end is connected to the draw bar 141 in the spindle body 131. In this case, an uneven cam projection 143 slidably fitted in a cam groove formed in the movable holder 134 is formed on one end side of the cam bar 142 so as to extend in an oblique direction intersecting the U-axis direction. .

  The rotational drive mechanism 150 is a mechanical device for rotationally driving the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130, respectively, and mainly includes a rotational drive motor 151 and a rotational drive transmission mechanism 152, respectively. ing. The rotation drive motor 151 is an actuator that is rotationally driven by the operation being controlled by the control unit 170, and is fixed in the housing 102 of the processing head 101. The rotation drive transmission mechanism 152 is a group of parts for transmitting the rotation driving force of the rotation drive motor 151 to the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130, respectively. In this embodiment, a driven gear is used. It is comprised by the gear train which meshes with 113,123,132. Note that the rotation drive transmission mechanism 152 can transmit a rotation driving force by the rotation drive motor 151 to the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130, respectively. It can also be configured with a structure.

  The U-axis drive mechanism 160 is a mechanical device for displacing the blade 135 in the U-axis displacement machining tool 130 in the radial direction of the non-straight hole NSH formed in the workpiece WK, that is, in the U-axis direction. A U-axis drive motor 161 and a U-axis drive transmission mechanism 162 are provided. The U-axis drive motor 161 is an actuator that is rotationally driven by the operation being controlled by the control unit 170, and is fixed in the housing 102 of the processing head 101. The U-axis drive transmission mechanism 162 is a group of parts for converting the rotational driving force by the U-axis driving motor 161 into a linear driving force and transmitting it to the draw bar 141. In the present embodiment, the U-axis driving transmission mechanism 162 is a ball screw 162a and the ball screw 162a. The movable body 162b is formed with a female screw (not shown) that meshes with each other. That is, the U-axis drive transmission mechanism 162 is configured by a feed screw mechanism in the present embodiment.

  The control unit 170 is configured by a microcomputer including a CPU, a ROM, a RAM, and the like. The control unit 170 comprehensively controls the overall operation of the hole drilling machine 100, and is a machining program (not shown) prepared by an operator (a so-called NC). (Numerical Control) program) controls the operations of the Z-axis drive motor 103, the rotation drive motor 151, and the U-axis drive motor 161, and turns the straight hole machining tools 110, 120 and the U-axis displacement machining tool 130 into the workpiece WK. On the other hand, the machining of the straight holes SH1 to SH3 and the non-straight hole NSH to the workpiece WK is controlled by relatively displacing the machining head 101. The hole drilling machine 100 includes a work table that detachably holds the workpiece WK, an input device that inputs an instruction from an operator to the control unit 170, and a liquid crystal display that displays an operation status of the control unit 170. An apparatus (none of which is shown) is also provided, but the description thereof is omitted because it is not directly related to the present invention.

(Operation of drilling machine 100)
Next, the operation of the hole drilling machine 100 configured as described above will be described. The hole processing machine 100 is incorporated in a production line for manufacturing the workpiece WK and constitutes one process for manufacturing the workpiece WK. Therefore, the hole processing machine 100 starts the processing of the straight holes SH1 to SH3 and the non-straight hole NSH when the workpiece WK is disposed opposite to the processing head 101. In this case, the hole processing machine 100 starts the processing of the straight holes SH1 to SH3 and the non-straight hole NSH by executing a processing program stored in advance in the control unit 170.

  In the present embodiment, a cylinder block in a reciprocating engine is used as a workpiece WK, and straight holes SH1 to SH3 and non-straight holes NSH are respectively machined on the surface of the workpiece WK. In this case, the workpiece WK is drilled after the straight holes SH1 to SH3 and the lower holes of the non-straight holes NSH (holes leaving a predetermined allowance with respect to the regular finishing dimensions) are processed in the previous step. It is positioned at a predetermined position with respect to the machining head 101 in the machine 100.

First, as shown in FIG. 6, the control unit 170 in the hole processing machine 100 performs each processing of the straight holes SH <b> 1 to SH <b> 3 on the workpiece WK as the first step. Specifically, the control unit 170 starts the operation of the rotation drive motor 151 and drives the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130 to rotate, and then operates the Z-axis drive motor 103. The machining head 101 is displaced to the workpiece WK side by controlling. In this case, the control unit 170 controls the operation of the U-axis drive motor 161 to position the movable body 162b at the origin position most pressed to the workpiece WK side, so that the cutter 135 held by the movable holder 134 is straightened. It is located at the most central origin position in the hole of SH3 .

  Thereby, the hole drilling machine 100 cuts the straight holes SH1 to SH3 by the cutters 112, 122, and 137 in the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130, respectively. In this case, in the hole drilling machine 100, since the positional relationship between the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130 corresponds to the positional relationship between the straight holes SH1 to SH3, each hole has a high-precision positional relationship. Can be processed. In addition, since the cutter 135 in the U-axis displacement machining tool 130 is located at the origin position, the hole drilling machine 100 does not cut the workpiece WK during the machining of the straight holes SH1 to SH3. . Moreover, this 1st process of cutting each of these straight holes SH1-SH3 is corresponded to the straight hole processing process which concerns on this invention.

Next, the control part 170 performs the positioning for the process of the non-straight hole NSH as a 2nd process. Specifically, after cutting the straight holes SH <b> 1 to SH <b> 3, the control unit 170 controls the operation of the Z-axis drive motor 103 to displace the machining head 101 to the side away from the workpiece WK. Then, the cutter 135 of the U-axis displacement machining tool 130 is positioned at the machining start position in the non-straight hole NSH (straight hole SH3). In the present embodiment, the control unit 170 positions the blade 135 of the U-axis displacement machining tool 130 at the end on the back side of the non-straight hole NSH (straight hole SH3). Thereby, the cutters 112, 122, and 137 in the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130 are positioned outside the openings of the straight holes SH1 to SH3.

Next, as a third step, the control unit 170 processes the non-straight hole NSH on the workpiece WK. Specifically, the control unit 170 controls the operation of the rotation drive motor 151 to continue the rotation drive of the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130, and the Z-axis drive motor 103 and The operation of the U-axis drive motor 161 is controlled to displace the machining head 101 in a direction away from the workpiece WK, and the draw bar 141 is pulled to displace the movable holder 134 radially outward of the non-straight hole NSH. .

  In this case, the control unit 170 appropriately adjusts the amount of change in the U-axis direction (the radially outer side of the non-straight hole NSH) of the movable holder 134 with respect to the displacement amount of the machining head 101 in the Z-axis direction. The non-straight hole NSH can be formed by forming a conical shape or a spherical shape on the inner peripheral surface of the NSH prepared hole. In addition, it is called linear interpolation that the control part 170 displaces the cutter 135 linearly, and it is called circular interpolation that the cutter 135 is displaced curvedly. Therefore, the control unit 170 controls the operations of the Z-axis drive motor 103 and the U-axis drive motor 161 to open the non-straight hole NSH from the back side in the hole by performing linear interpolation and / or circular interpolation of the blade 135. It can be formed toward the part side.

In this case, since the hole processing machine 100 continuously processes the non-straight hole NSH without changing the U-axis displacement processing tool 130 by the processing head 101 that has processed the straight holes SH1 to SH3, the non-straight hole NSH. Can be processed in a short time with a highly accurate positional relationship with respect to the straight holes SH1 to SH3. And this 3rd process of cutting this non-straight hole NSH is equivalent to the non-straight hole processing process concerning the present invention.

  Next, the control part 170 performs origin return as a 4th process. Specifically, the control unit 170 stops the operation of the rotary drive motor 151 and controls the operations of the Z-axis drive motor 103 and the U-axis drive motor 161 to separate the machining head 101 from the workpiece WK. Meanwhile, the blade 135 held by the movable holder 134 is positioned at the most central origin position in the hole of the straight hole SH3. Thereby, the hole processing machine 100 complete | finishes each process of the straight holes SH1-SH3 and the non-straight hole NSH with respect to the workpiece WK.

  As can be understood from the above description of the operation, according to the above embodiment, the hole drilling machine 100 performs the straight hole machining step for machining the straight holes SH1 to SH3 on the workpiece WK and the non-straight to the workpiece WK. The non-straight hole machining step for machining the hole NSH is performed by the machining head 101 that holds the straight hole machining tools 110 and 120 for machining the straight holes SH1 to SH3 and the U-axis displacement machining tool 130 for machining the non-straight hole NSH. Therefore, each of the straight holes SH1 to SH3 and the non-straight hole NSH can be processed with high accuracy and in a short time.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. In the following description of each modified example and the drawings to be referred to, the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.

For example, in the above embodiment, the machining head 101 is configured to include two straight hole machining tools 110 and 120 and one U-axis displacement machining tool 130. However, the number of each of the straight hole machining tools 110 and 120 and the U-axis displacement machining tool 130 included in the machining head 101 corresponds to the number of straight holes SH and non-straight holes NSH formed in the workpiece WK. It is not necessarily limited to the above embodiment. Therefore, the machining head 101 may be configured to include at least one straight hole machining tool and a U-axis displacement machining tool.

Moreover, in the said embodiment, the U-axis displacement processing tool 130 is provided with the cutter 137 which processes the straight hole SH3 in addition to the cutter 135 which processes the non-straight hole NSH. However, the U-axis displacement machining tool 130 only needs to include at least the blade 135 for machining the non-straight hole NSH, and does not necessarily need to be configured to include the blade 137 for machining the straight hole SH2. In other words, the U-axis displacement machining tool 130 can be configured only with the cutter 135 for machining the non-straight hole NSH.

  In the above embodiment, the machining head 101 is configured to be displaced along the Z-axis direction approaching or separating from the workpiece WK. However, since the processing head 101 and the workpiece WK only need to be configured to be relatively displaced, the work table that holds the workpiece WK is configured to approach or separate from the processing head 101. You can also Further, the hole drilling machine 100 displaces the work table that holds the machining head 101 or the workpiece WK in the X-axis direction and / or the Y-axis direction, which are biaxial directions perpendicular to each other in a plane perpendicular to the Z-axis direction. It is also possible to configure it.

Moreover, in the said embodiment, the hole drilling machine 100 performs the non-straight hole processing process which processes the non -straight hole NSH with the U-axis displacement processing tool 130 after the straight hole processing process which processes the straight holes SH1-SH3. It was configured as follows. However, the hole drilling machine 100 can also be configured to execute the non-straight hole machining step for machining the non -straight hole NSH before the straight hole machining step for machining the straight holes SH1 to SH3 . As described above, the non-straight hole drilling process and the straight hole drilling process are not simultaneously processed by executing the non-straight hole drilling process as a separate process from the straight hole drilling process. The adverse effect on the machining accuracy due to the variation in the thickness can be suppressed, and the machining accuracy can be improved. Moreover, the hole drilling machine 100 can also perform these non-straight hole drilling processes and straight hole drilling processes simultaneously. In this case, the hole processing machine 100 can process non-straight holes and straight holes in a short time.

  In the above-described embodiment, the arm part 134a of the movable holder 134 is such that the blades 112, 122, and 137 are separated from the surface of the workpiece WK when the blade 135 is positioned at the back end of the non-straight hole NSH. In other words, it is formed with a length located outside the openings of the straight holes SH1 to SH3. Thereby, the hole drilling machine 100 can easily execute the non-straight hole drilling process as a separate process from the straight hole drilling process. However, the length of the arm portion 134a is appropriately determined according to the shape of the non-straight hole NSH and the processing position, and is not necessarily limited to the above embodiment. Therefore, the movable holder 134 can be configured such that the length of the arm portion 134a is shorter than that of the above-described embodiment, and for example, the blade 135 is provided at the same position on the Z-axis direction as the blade 137.

WK ... Workpiece, SH1 to SH3 ... Straight hole, NSH ... Non-straight hole,
100 ... hole drilling machine,
101 ... Processing head, 102 ... Case, 103 ... Z-axis drive motor,
110 ... Straight hole machining tool, 111 ... Spindle, 112 ... Cutlery, 113 ... Driven gear,
120 ... Straight hole machining tool, 121 ... Spindle, 122 ... Blade, 123 ... Driven gear,
DESCRIPTION OF SYMBOLS 130 ... U-axis displacement processing tool, 131 ... Spindle main body, 132 ... Drive gear, 133 ... Holder base, 134 ... Movable holder, 134a ... Arm part, 134b ... Drive part, 135 ... Cutlery, 136 ... Fixed holder, 137 ... Cutlery ,
141 ... Draw bar, 142 ... Cam bar, 143 ... Cam protrusion,
150 ... Rotation drive mechanism, 151 ... Rotation drive motor, 152 ... Transmission mechanism,
160, U-axis drive mechanism, 161, U-axis drive motor, 162, transmission mechanism, 162a, ball screw, 162b, movable body.

Claims (5)

A straight hole machining tool for machining a straight hole with a constant hole diameter on the workpiece;
A U-axis displacement machining tool for holding a cutter in a U-axis direction, which is a radial direction of the non-straight hole, in order to machine a non-straight hole whose hole diameter changes in the workpiece;
A machining head that holds the straight hole machining tool and the U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively.
A Z-axis drive motor that displaces the machining head in the Z-axis direction close to or away from the workpiece;
A U-axis driving motor for displacing the blade in the U-axis displacement machining tool in the U-axis direction;
A tool rotation driving prime mover for rotating and driving the straight hole machining tool and the U-axis displacement machining tool;
A control unit for controlling each operation of the Z-axis drive prime mover, the U-axis drive prime mover, and the tool rotation drive prime mover ,
The U-axis displacement machining tool is
It has an arm part that extends like a rod,
The arm portion is
When the blade has the cutting tool at the tip, and when the blade is positioned at the back end of the non-straight hole, the blade that the straight hole machining tool has is more than the opening of the straight hole on the surface of the workpiece. a well bore a processing method using the hole drilling machine that has been formed by a length which is located outside,
In the control unit,
A straight hole machining step of machining the straight hole in the workpiece by causing the machining head to approach the workpiece in a state in which the straight hole machining tool is rotationally driven;
While rotating the straight hole machining tool, the cutting head of the straight hole machining tool is positioned outside the straight hole opening on the surface of the workpiece, and the machining head is placed on the workpiece. And a non-straight hole drilling step for machining the non-straight hole in the workpiece by displacing the cutter of the U-axis displacement machining tool in the U-axis direction. Method. The hole drilling method according to claim 1,
The U-axis displacement machining tool is
In addition to the blade, it has a blade that processes the straight hole,
The straight hole machining step includes:
The straight hole is performed with the cutter for the straight hole provided in the U-axis displacement machining tool,
The non-straight hole drilling process includes
Hole processing wherein said U-axis displacement machining tool characterized that you processing the non-straight hole in the same hole and the straight bore for machining. A straight hole machining tool for machining a straight hole with a constant hole diameter on the workpiece;
A U-axis displacement machining tool for holding a cutter in a U-axis direction, which is a radial direction of the non-straight hole, in order to machine a non-straight hole whose hole diameter changes in the workpiece;
A machining head that holds the straight hole machining tool and the U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively.
A Z-axis drive motor that displaces the machining head in the Z-axis direction close to or away from the workpiece;
A U-axis driving motor for displacing the blade in the U-axis displacement machining tool in the U-axis direction;
A tool rotation driving prime mover for rotating and driving the straight hole machining tool and the U-axis displacement machining tool;
A control unit for controlling each operation of the Z-axis drive prime mover, the U-axis drive prime mover, and the tool rotation drive prime mover ,
The U-axis displacement machining tool is
It has an arm part that extends like a rod,
The arm portion is
When the blade has the cutting tool at the tip, and when the blade is positioned at the back end of the non-straight hole, the blade that the straight hole machining tool has is more than the opening of the straight hole on the surface of the workpiece. even method for producing a cylinder block with a hole drilling machine that has been formed by a length which is located outside,
In the control unit,
A straight hole machining step of machining the straight hole in the cylinder block by causing the machining head to approach the cylinder block with the straight hole machining tool being rotationally driven;
While rotating the straight hole machining tool, the cutting head of the straight hole machining tool is positioned outside the straight hole opening on the surface of the workpiece, and the machining head approaches the cylinder block. And a non-straight hole machining step of machining the non-straight hole in the cylinder block by displacing the blade of the U-axis displacement machining tool in the U-axis direction. Method. A straight hole machining tool for machining a straight hole with a constant hole diameter on the workpiece;
A U-axis displacement machining tool for holding a cutter in a U-axis direction, which is a radial direction of the non-straight hole, in order to machine a non-straight hole whose hole diameter changes in the workpiece;
A machining head that holds the straight hole machining tool and the U-axis displacement machining tool at positions corresponding to the positions of the straight hole and the non-straight hole, respectively.
A Z-axis drive motor that displaces the machining head in the Z-axis direction close to or away from the workpiece;
A U-axis driving motor for displacing the blade in the U-axis displacement machining tool in the U-axis direction;
A tool rotation driving prime mover for rotating and driving the straight hole machining tool and the U-axis displacement machining tool;
A control unit for controlling each operation of the Z-axis drive prime mover, the U-axis drive prime mover, and the tool rotation drive prime mover ,
The U-axis displacement machining tool is
It has an arm part that extends like a rod,
The arm portion is
When the blade has the cutting tool at the tip, and when the blade is positioned at the back end of the non-straight hole, the blade that the straight hole machining tool has is more than the opening of the straight hole on the surface of the workpiece. Is also formed in a length located outside,
The controller is
The U-axis displacement machining tool moves the machining head closer to the workpiece while the cutting tool of the straight hole machining tool is positioned outside the opening of the straight hole on the surface of the workpiece. hole processing machine, characterized in Rukoto to execute a non-straight hole processing step of processing the non-straight hole the tool by displacing the U-axis direction in the workpiece having. In the hole drilling machine according to claim 4,
The U-axis displacement machining tool is
In addition to the blade, it has a blade that processes the straight hole ,
The controller is
Performs the straight hole in the blade for the straight hole through which the U-axis displacement machining tool is provided, you processing the non-straight hole in the same hole as the straight hole through which the U-axis displacement machining tool for machining A hole drilling machine characterized by that.

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