JP2016055414A - Machining apparatus, machining method, and machining program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining apparatus, a machining method, and a machining program capable of improving producibility and simultaneously machining contours of a workpiece with high accuracy.SOLUTION: A machining apparatus 10 machines contours of a workpiece 100 by a machining part 12 which is relatively movable on an XY plane with respect to the workpiece 100, and is provided with: a first arm 30 which is made movable forward and backward with respect to a machining position, and holds the workpiece 100 in a state of being projected onto the XY plane; a second arm 40 which has an elastic holding part 40c made movable along the XY plane and for holding the workpiece 100 held by the first arm 30 in the state of being projected onto the XY plane accompanied with movement toward the machining position; and a fixing screw 27 which fixes the second arm 40 at the machining position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machining apparatus, a machining method, and a machining program.

  As a processing apparatus for processing the outline (outer shape) of a workpiece, one using wire cut electric discharge machining is known (for example, see Patent Document 1). In wire-cut electrical discharge machining, a wire travels between wire guides arranged on both sides of the workpiece, and the workpiece and the wire are moved relative to each other in an in-plane direction perpendicular to the traveling direction of the wire while being discharged between them. While processing.

  By the way, in wire-cut electric discharge machining, it has been difficult to process the entire circumference of the workpiece in a lump while preventing interference between the stage holding the workpiece and the wire.

In view of this, a technique is known in which a workpiece is machined in a plurality of times to perform machining on the entire circumference of the workpiece.
For example, as a first prior art, a configuration in which a bridge portion for holding a workpiece is set in a part of the workpiece is known. In this case, in the first processing step, the portion other than the bridge portion is processed in a state where the bridge portion is held in the workpiece, and in the second processing step, the portion other than the bridge portion is held in the workpiece. In this state, the bridge portion is processed.
As a second conventional technique, a configuration in which a workpiece is fixed to a jig and the jig and the workpiece are processed together is known. In this case, in the first processing step, after a part of the workpiece is processed together with the jig, the cut portion of the jig in the first processing step is fixed. Then, in the second processing step, a portion of the workpiece other than the cut portion in the first processing step is processed together with the jig.

JP 2001-138155 A

However, in the first prior art described above, in the second processing step, there is a possibility that secondary discharge may occur through the processing waste generated in the first processing step.
Further, when the workpiece is misaligned between the first machining step and the second machining step, a boundary portion between the workpiece surface processed in the first machining step and the workpiece surface processed in the second machining step is formed. There is a risk of steps or the like.
Therefore, it is difficult to process the contour of the workpiece with high accuracy.

On the other hand, in the second prior art, when the cut portion of the first processing step is chemically fixed using an adhesive, there is a problem that workability is poor and manufacturing efficiency is lowered.
In addition, when the cut portion of the first machining step is mechanically firmly fixed, there is a risk that the workpiece may be displaced at the time of fixation, and the surface to be processed is processed with high accuracy as in the first prior art. It is difficult.

  Therefore, the present invention has been made in view of the above circumstances, and is to provide a machining apparatus, a machining method, and a machining program capable of improving manufacturing efficiency and machining a contour of a workpiece with high accuracy.

  In order to solve the above-described problems, the machining apparatus of the present invention passes through the machining position in the first direction and is capable of moving the workpiece by a machining unit that can move relative to the workpiece in an in-plane direction intersecting the first direction. A machining apparatus for machining an outline, wherein the workpiece is movable forward and backward with respect to the machining position, and is configured to be movable in an in-plane direction, a first arm that holds the workpiece in a state of projecting in an in-plane direction, A second arm having an elastic clamping portion for clamping the workpiece held by the first arm in a state of projecting in the in-plane direction along with the movement toward the machining position; and the second arm at the machining position. It is characterized by having a fixing part fixed with.

  According to this configuration, first, in a state where the workpiece is held by the first arm, the portion of the workpiece that protrudes in the in-plane direction from the first arm is processed. Thereafter, with the workpiece held at the machining position by the first arm, the second arm is moved toward the machining position, and the workpiece is transferred between the arms. Then, after the first arm is retracted from the processing position, the part of the work that protrudes in the in-plane direction from the second arm is processed in a state where the work is held by the second arm. Thereby, a contour is formed on the entire circumference with respect to the workpiece.

Here, in the configuration of the present invention, in the workpiece transfer process between the arms, the second arm moves in the in-plane direction according to the position of the workpiece held by the first arm, and the elastic clamping portion Holds the work while elastically deforming. Thereby, compared with the case where a workpiece | work is hold | maintained firmly with a 2nd arm, the load concerning a 1st arm or a workpiece | work at the time of delivery is small. Therefore, the position shift in the in-plane direction of the workpiece at the time of delivery can be suppressed, and the workpiece can be held by the second arm at the same position as the first arm in the in-plane direction. Then, by fixing the second arm with the fixing portion after delivery, the second arm can be positioned with high accuracy at the machining position. As a result, the entire circumference of the workpiece can be machined with high accuracy.
In this case, with the movement of the second arm to the processing position, the workpiece can be transferred between the first arm and the second arm, so that the manufacturing efficiency can be improved.

The elastic clamping portion has an opening toward the processing position and has a receiving portion for receiving the workpiece. The elastic clamping portion has three locations in the circumferential direction with respect to the outer peripheral surface of the workpiece. A holding claw that comes into contact may be provided.
According to this configuration, since the holding claws of the elastic clamping portion abut against the outer peripheral surface of the workpiece at three locations in the circumferential direction, the workpiece can be stably held at a desired position in the elastic clamping portion.

Further, the first arm and the second arm may sandwich a support shaft that protrudes in a first direction from a portion of the work that is located inward of the contour in an in-plane direction.
According to this configuration, since each arm holds the support shaft of the workpiece, a portion to be machined (a portion where a contour is formed) of the workpiece can be greatly protruded from each arm. Thereby, in a processing process, after suppressing interference with an arm and a processing part, one processing area can be secured.

In addition, the first arm and the elastic clamping unit may each include a plurality of clamping pieces arranged at intervals in the first direction.
According to this structure, since the 1st arm and the elastic clamping part clamp a workpiece | work with the some clamping piece spaced apart in the 1st direction, the inclination of the workpiece | work to the direction which cross | intersects a 1st direction can be suppressed.
In particular, by dividing the elastic clamping portion into a plurality of clamping pieces, each clamping piece can be flexibly deformed according to the shape and position of the workpiece, and further operability can be provided.

Further, the sandwiching pieces on the first arm side and the sandwiching pieces on the elastic sandwiching part side may be alternately arranged in the first direction.
According to this configuration, since the sandwiching pieces are alternately arranged in the first direction, at the time of delivery, the sandwiching pieces overlap with each other in the first direction while being alternately engaged with each other. Therefore, each clamping piece can be made to approach in a 1st direction, and the moment which acts on a workpiece | work at the time of delivery can be made small. Therefore, at the time of delivery, it is possible to suppress the tilt of the workpiece in the direction intersecting the first direction, and to perform positioning with higher accuracy.

The processing method of the present invention is a processing method using the processing apparatus of the present invention, wherein the work held by the first arm and the processing portion are relatively moved in an in-plane direction. A first machining step for machining the workpiece, and a delivery step for moving the second arm toward the machining position and clamping the workpiece by the elastic clamping portion in accordance with the movement toward the machining position. A positioning step of positioning the second arm at the processing position by the fixing portion, a retracting step of retracting the first arm from the processing position, the workpiece sandwiched by the elastic clamping portion, and the processing And a second machining step for machining the workpiece while relatively moving the portion in the in-plane direction.
According to this configuration, by processing the workpiece using the above-described processing apparatus, it is possible to improve the manufacturing efficiency and process the contour of the workpiece with high accuracy.

In the machining program of the present invention, the control unit for operating the machining apparatus of the present invention moves the workpiece held by the first arm and the machining unit relative to each other in the in-plane direction. A first machining step for machining the workpiece, and a delivery step for moving the second arm toward the machining position and clamping the workpiece by the elastic clamping portion in accordance with the movement toward the machining position. A positioning step for positioning the second arm at the processing position by the fixing portion, a retreating step for retracting the first arm from the processing position, the workpiece sandwiched by the elastic clamping portion, And a second machining step for machining the workpiece while relatively moving the machining portion in an in-plane direction.
According to this configuration, by processing the workpiece using the above-described processing apparatus, it is possible to improve the manufacturing efficiency and process the contour of the workpiece with high accuracy.

  ADVANTAGE OF THE INVENTION According to this invention, while improving manufacturing efficiency, the outline of a workpiece | work can be processed with high precision.

It is a perspective view of the processing apparatus which concerns on embodiment of this invention. It is a principal part enlarged view of the processing apparatus which shows the state holding the workpiece | work with a 1st arm. It is a flowchart for demonstrating a processing method. It is explanatory drawing for demonstrating a delivery process. It is explanatory drawing for demonstrating after a evacuation process.

Next, embodiments of the present invention will be described with reference to the drawings.
<Processing equipment>
FIG. 1 is a perspective view of a processing apparatus 10 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part showing a state in which the work is held by the first arm, where (a) is a plan view and (b) is a cross-sectional view.
As shown in FIGS. 1 and 2, a processing apparatus 10 processes a workpiece 100 by wire-cut discharge by a processing unit 12, and includes a workpiece holding mechanism 20 that holds the workpiece 100, a workpiece holding mechanism 20, and a processing. And a control unit 16 that comprehensively controls the operation of the unit 12. In the following description, an X, Y, Z orthogonal coordinate system is used as necessary. In this case, a traveling direction of the wire 15 described later in the processing unit 12 is a Z direction (first direction), and in-plane directions orthogonal to the Z direction are an X direction and a Y direction, respectively.

  Here, the workpiece 100 to be machined in the machining apparatus 10 has, for example, a cylindrical shape. Specifically, the workpiece 100 includes a disc portion 101, a boss portion 102 that protrudes from the disc portion 101 toward one side in the Z direction, and has an outer diameter smaller than that of the disc portion 101, and the disc portion 101 to Z. And a support shaft 103 that protrudes toward the other side of the direction and has an outer diameter smaller than that of the boss portion 102. The central axes of the disc part 101, the boss part 102, and the support shaft 103 are arranged coaxially. And in the processing apparatus 10 of this embodiment, a gear tooth is formed with a predetermined pitch with respect to the outer peripheral part of the disc part 101 of the workpiece | work 100. FIG. And the workpiece | work 100 in which the gear teeth were formed is used as a shaping | molding die at the time of shaping | molding timepiece components, for example by injection molding.

  The work holding mechanism 20 is held in a processing tank (not shown) and is movable relative to the processing unit 12 in the XY directions. Specifically, the workpiece holding mechanism 20 includes a frame 21, a first arm 30 and a second arm 40 that are supported by the frame 21 and hold the workpiece 100.

The frame 21 has a rectangular frame shape in a plan view as viewed from the Z direction, and has an opening 21a penetrating in the Z direction.
In the frame 21, a pair of side portions 21b and 21c facing each other in the X direction have a first guide groove 23 for holding the first arm 30 and a second guide groove 24 for holding the second arm 40, respectively. Is formed. These guide grooves 23 and 24 are recessed toward the other side in the Z direction, and penetrate the side portions 21b and 21c in the X direction.

  Further, the frame 21 is provided with a first fixing plate 25 and a second fixing plate 26 that respectively close the guide grooves 23 and 24 from one side in the Z direction. The first fixing plate 25 is disposed so as to straddle the first guide groove 23 in the Y direction, and both ends thereof are fixed to the frame 21 by bolts 25a. On the other hand, the second fixing plate 26 is disposed so as to straddle the second guide groove 24 in the Y direction, and both ends thereof are fixed to the frame 21 by bolts 26a. In addition, a fixing screw 27 (fixing portion) that penetrates the second fixing plate 26 in the Z direction is provided at the center portion in the Y direction of the second fixing plate 26. That is, the fixing screw 27 can be advanced and retracted in the Z direction with respect to the second guide groove 24.

  The first arm 30 has a prismatic shape extending along the X direction, and is held in the first guide groove 23 so as to be movable along the X direction. Specifically, the first arm 30 is configured such that a later-described work holding portion 30c can advance and retreat in the X direction with respect to a processing position (in the illustrated example, the central portion of the opening 21a in the XY plane). In the following description, in the X direction and the Y direction, the processing position side may be referred to as the inside, and the side opposite to the processing position may be referred to as the outside.

The first arm 30 includes a base 30a, a pair of arm main bodies 30b extending from the base 30a toward the inside in the X direction, and a pair of work holders formed separately at the tip of the arm main body 30b. Part 30c.
The base 30 a and the arm main body 30 b have the same height in the Z direction as the depth of the first guide groove 23. The first arm 30 is positioned in the X direction when the base 30a or the arm main body 30b is pressed against the first fixing plate 25 in the first guide groove 23. On the other hand, the movement of the first arm 30 in the X direction is allowed by releasing the tightening of the first fixing plate 25 by the bolt 25a.

  The arm bodies 30b extend in parallel to each other along the X direction. In the arm main body 30b, the distance between the inner surfaces located on the inner side in the Y direction is equal to or greater than the outer diameter of the support shaft 103 of the workpiece 100, and the distance between the outer surfaces located on the outer side in the Y direction is circular. The outer diameter of the plate portion 101 is smaller. The arm body 30b is provided with a fixing bolt 32 that connects the arm bodies 30b. The fixing bolt 32 penetrates both arm bodies 30b in the Y direction and adjusts the fastening force to move both arm bodies 30b closer to and away from each other in the Y direction.

  Each work holding portion 30c has a plate-like shape in which the width in the Y direction is equal to that of the arm main body 30b and the thickness in the Z direction is thinner than that of the arm main body 30b. Projected separately to the inside. Each work holding part 30c clamps the support shaft 103 of the work 100 from both sides in the Y direction. In the present embodiment, the work holding portion 30c is configured by a plurality of sets (two sets in the illustrated example) of the clamping pieces 31 arranged at intervals in the Z direction, and the support shaft 103 is moved to the Z direction by the clamping pieces 31. It is designed to be clamped at two locations with a gap in the direction. Each clamping piece 31 has the same shape and size.

  In addition, a positioning recess 35 that holds the support shaft 103 is formed in the inner edge of each sandwiching piece 31 that is located on the inner side in the Y direction. The positioning recess 35 has an arc shape having a radius of curvature equivalent to that of the support shaft 103 in a plan view as viewed from the Z direction, and abuts on the outer peripheral surface of the support shaft 103. In addition, the outer side edge located in the outer side of the Y direction in each clamping piece 31 inclines toward the inner side of the Y direction toward the inner side of the X direction. Further, the distance in the X direction between the leading edge of the sandwiching piece 31 and the positioning recess 35 is shorter than the radius of the disc part 101. Therefore, the 1st arm 30 (work holding part 30c) is the state which made the field (the 1st processing field H1) of 180 degrees or more located in the 2nd arm 40 side among disk parts 101 project on the XY plane. , The workpiece 100 is held.

  The second arm 40 has a plate shape extending in the X direction, and is held in the second guide groove 24 described above so as to be movable on the XY plane. Specifically, in the second arm 40, an elastic clamping portion 40c, which will be described later, can be moved back and forth with respect to the processing position, and the first arm 30 and the workpiece 100 are transferred at the processing position.

  The second arm 40 includes a base portion 40a held in the second guide groove 24, a constricted portion 40b provided continuously with the distal end portion of the base portion 40a, and an elastic clamping portion 40c provided continuously with the distal end portion of the constricted portion 40b. And have.

The base 40 a is loosely inserted in the second guide groove 24. Specifically, the base 40 a has a width in the Y direction that is narrower than the groove width of the second guide groove 24, and a thickness in the Z direction that is thinner than the groove depth of the second guide groove 24. The second arm 40 is positioned on the XY plane by the base 40a being pressed in the Z direction within the second guide groove 24 by the fixing screw 27 described above. That is, the pressing force of the second arm 40 by the fixing screw 27 is adjusted by adjusting the protruding amount of the fixing screw 27 into the second guide groove 24 with respect to the second fixing plate 26.
The constricted portion 40b is located between the base portion 40a and the elastic clamping portion 40c, and the width in the Y direction gradually decreases toward the inside in the X direction.

  The elastic clamping portion 40c has a plate shape projecting inward in the X direction from the distal end surface of the constricted portion 40b, and clamps the support shaft 103 of the workpiece 100 inside thereof. In the present embodiment, the elastic clamping portion 40c is composed of a plurality of clamping pieces 41 arranged at intervals in the Z direction, and these clamping pieces 41 allow the support shaft 103 to be spaced at intervals in the Z direction. It is designed to be pinched at a place. The holding pieces 41 are alternately arranged in the Z direction with respect to the holding pieces 31 on the first arm 30 side described above. Specifically, among the holding pieces 41 on the second arm 40 side, the holding pieces 41 located on one side in the Z direction are located between the holding pieces 31 on the first arm 30 side and on the other side in the Z direction. The sandwiching piece 41 positioned is located on the other side in the Z direction with respect to each sandwiching piece 31 on the first arm side. Therefore, the elastic clamping part 40c and the workpiece holding part 30c described above are overlapped in the Z direction in a state where the clamping pieces 31 and 41 are alternately meshed at the machining position (see FIG. 4).

  Each sandwiching piece 41 has a C shape whose outer diameter is smaller than the outer diameter of the disc portion 101 in a plan view as viewed from the Z direction, and is 180 ° positioned on the first arm 30 side of the disc portion 101. The workpiece 100 is held in a state where the above region (second processing region H2 in FIG. 5) is projected on the XY plane. Specifically, each clamping piece 41 has a receiving portion 41a that opens toward the inside in the X direction. The receiving part 41a is formed so that the opening width (opening width in the circumferential direction of the sandwiching piece) gradually decreases toward the outer side in the X direction so that the support shaft 103 of the workpiece 100 can be guided to the inside of the sandwiching piece 41. It is configured. In addition, the opening width of the part located inside X direction among the receiving parts 41a is larger than the outer diameter of the support shaft 103, and the opening width of the part located outside the X direction is the support shaft 103. It is smaller than the outer diameter. And the clamping piece 41 can be elastically deformed in the direction in which the opening width of the receiving part 41a expands / contracts.

  A plurality of (three in the illustrated example) holding claws 41 b projecting inward in the radial direction are formed on the inner peripheral edge of the sandwiching piece 41 at intervals in the circumferential direction. In the illustrated example, these holding claws 41 b are formed at both end portions and the central portion of the sandwiching piece 41 in the circumferential direction. The holding claw 41b positions the support shaft 103 in the elastic clamping portion 40c with the tip end surface abutting on the outer peripheral surface of the support shaft 103 in a state where the support shaft 103 is held in the holding piece 41.

The processing unit 12 is disposed on the downstream side of the supply unit (not shown) for supplying the wire 15, and is wound between the supply unit and the winding unit. And a wire guide (not shown) for guiding the travel of the wire 15.
The wire guides are disposed on both sides in the Z direction with respect to the workpiece holding mechanism 20.
The wire 15 is bridged between the wire guides through the opening 21 a of the frame 21. Then, the wire 15 travels between the wire guides by the rotation of the winding unit, and thus passes the machining position in the Z direction within the opening 21a of the frame 21. Then, when the wire 15 passes through the machining position, the workpiece 100 is subjected to electric discharge machining by being discharged from the workpiece 100 (disc portion 101).

  The control unit 16 controls the operation of each unit of the processing apparatus 10 by executing processing based on a preset computer program in cooperation with a CPU, a memory, and the like. In the present embodiment, the control unit 16 relatively moves the workpiece 100 held by the workpiece holding mechanism 20 and the wire 15 on the XY plane while sequentially feeding the wires 15 along the Z direction, so that the wires 15 are moved. A predetermined machining is performed on the workpiece 100 by generating an electric discharge between the workpiece 100 and the workpiece 100.

  In particular, as an example of the operation, the control unit 16 reads and executes a machining program stored in a memory, for example, thereby controlling a driving unit (not shown) and executing various steps to be described later.

  The machining program is a program for machining by moving the workpiece 100 and the wire 15 relative to each other on the XY plane while running the wire 15 along the Z direction, and the workpiece 100 by the arms 30 and 40 at the machining position. It is a program that performs delivery.

<Processing method>
Next, the processing method of the workpiece | work 100 using the processing apparatus 10 mentioned above is demonstrated. FIG. 3 is a flowchart for explaining the processing method of the present embodiment.
The machining method of the present embodiment includes a first positioning step S1 for positioning the first arm 30 with the workpiece 100 held between the machining positions, a first machining step S2 for machining the workpiece 100, and the first arm 30. Transfer step S3 for transferring the workpiece 100 between the first arm 30 and the second arm 40, a second positioning step S4 for positioning the second arm 40 at the processing position, and a retraction step S5 for retracting the first arm 30 from the processing position. And a second machining step S6 for machining the workpiece 100.

  As shown in FIG. 2, in the first positioning step S <b> 1, first, the workpiece 100 is set on the first arm 30. Specifically, with the fixing bolt 32 loosened, the support shaft 103 of the workpiece 100 is inserted between the workpiece holding portions 30c (the clamping pieces 31). At this time, the support shaft 103 is inserted between the positioning recesses 35 in each work holding portion 30c. Thereafter, the support bolt 103 is firmly held between the work holding portions 30c by tightening the fixing bolt 32 and bringing the arm main bodies 30b closer to each other in the Y direction. At this time, a region of the disc portion 101 of the workpiece 100 that protrudes in the XY plane with respect to the workpiece holding portion 30c is defined as a first machining region H1 in the first machining step S2.

  In the first positioning step S1, the disc portion 101 of the workpiece 100 is in contact with the workpiece holding portion 30c from one side in the Z direction. In the first positioning step S1, the second arm 40 stands by with the elastic clamping portion 40c retracted from the processing position.

  Next, the first arm 30 is moved inward in the X direction, and the workpiece 100 (work holding portion 30c) is set at the machining position. Thereafter, the first arm 30 is positioned by pressing the first arm 30 with the first fixing plate 25.

  Subsequently, in the first machining step S2, electric discharge machining is performed on the first machining region H1 in the disc portion 101 of the workpiece 100. Specifically, with the workpiece 100 positioned by the first arm 30, the wire 15 travels in the Z direction, and the wire 15 and the first machining region H1 of the disc portion 101 are aligned with the contour to be machined. The work holding mechanism 20 is moved relative to the XY plane. At this time, discharge is generated between the workpiece 100 (disk portion 101) and the disk portion 101, so that the outer peripheral portion of the disk portion 101 is cut along the contour. Thereby, a desired outline can be formed in the disk portion 101 with respect to the first processing region H1. The electric discharge machining in the first machining step S2 may be performed only once for the first machining region H1, or may be repeated a plurality of times for the first machining region H1. By performing electric discharge machining a plurality of times, the surface roughness of the work surface can be reduced, and the workpiece 100 can be machined with high accuracy.

FIG. 4 is an explanatory diagram for explaining the delivery step S3.
In the delivery step S3, the second arm 40 is moved toward the machining position with the first arm 30 positioned at the machining position. Specifically, with the receiving portion 41a of the holding piece 41 facing the support shaft 103, until the elastic holding portion 40c of the second arm 40 overlaps the workpiece holding portion 30c of the first arm 30 in the Z direction, The second arm 40 is moved. At this time, among the holding pieces 41 on the second arm 40 side, the holding piece 41 located on one side in the Z direction enters between the holding pieces 31 on the first arm 30 side, so that the holding pieces 31 and 41 are The elastic clamping part 40c and the workpiece holding part 30c overlap with each other in the Z direction while being alternately engaged with each other.

  Further, in the process in which the second arm 40 moves toward the machining position, the outer peripheral surface of the support shaft 103 abuts on the inner peripheral edge of the receiving portion 41a. In this state, when the second arm 40 is further moved toward the machining position, the support shaft 103 expands the receiving portion 41a, whereby the holding piece 41 is elastically deformed. As a result, the support shaft 103 enters toward the inside of the sandwiching piece 41. When the support shaft 103 gets over the receiving portion 41 a, the holding piece 41 is restored and deformed, whereby the opening width of the receiving portion 41 a is reduced and the holding claw 41 b comes into contact with the outer peripheral surface of the support shaft 103. As a result, the workpiece 100 is clamped by the second arm 40.

  Here, in the delivery step S3, the first arm 30 is firmly held in the state of being positioned at the machining position, while the second arm 40 is movable in the XY plane and the elastic clamping portion 40c is movable. The workpiece 100 is held while being elastically deformed. Thereby, the position shift of the 1st arm 30 or the workpiece | work 100 at the time of delivery is suppressed.

  Next, in the second positioning step S4, the fixing screw 27 is tightened to position the second arm 40.

FIG. 5 is an explanatory diagram for explaining the evacuation step S5 and subsequent steps.
Subsequently, in the retracting step S <b> 5, first, the fixing bolt 32 is loosened, and the work holding portion 30 c of the first arm 30 is separated from the support shaft 103. Thereafter, the bolt 25a of the first fixing plate 25 is loosened, the positioning of the first arm 30 is released, and the first arm 30 is moved outward in the X direction, thereby retracting the work holding portion 30c from the machining position. . As a result, the workpiece 100 is held only by the second arm 40 (elastic holding portion 40c). At this time, a protruding region in the XY plane with respect to the elastic clamping portion 40c in the disc portion 101 of the workpiece 100 is set as a second processing region H2 in the second processing step S6. In this embodiment, it sets so that at least both ends may overlap among each process area | region H1, H2.

Next, in the second machining step S6, electric discharge machining is performed on the second machining region H2 by the same method as in the first machining step S2. Thereby, a desired contour can be formed over the entire circumference of the disc portion 101. Thereafter, the workpiece 100 is taken out from the second arm 40. In the second machining step S6 as well, similarly to the first machining step S2, the electric discharge machining may be repeated a plurality of times for the second machining region H2.
Thus, the processing method according to this embodiment is completed.

As described above, in the present embodiment, the second arm 40 is configured to be movable in the XY plane and includes the elastic clamping unit 40c that clamps the workpiece 100 as it moves toward the machining position.
According to this configuration, while the second arm 40 moves in the XY plane in accordance with the position of the workpiece 100 held by the workpiece holding portion 30c of the first arm 30, the elastic clamping portion 40c is elastically deformed, The workpiece 100 (support shaft 103) is clamped. Thereby, compared with the case where the workpiece | work 100 is hold | maintained firmly with the 2nd arm 40, there are few loads applied to the 1st arm 30 and the workpiece | work 100 at the time of delivery. Therefore, the position shift of the workpiece 100 on the XY plane at the time of delivery can be suppressed, and the workpiece 100 can be held by the second arm 40 at the same position as the first arm 30 (work holding portion 30c) on the XY plane. it can. Then, by fixing the second arm 40 with the fixing screw 27 after delivery, the second arm 40 can be positioned with high accuracy at the machining position. As a result, the contour of the entire circumference can be machined with high accuracy with respect to the disc portion 101 of the workpiece 100.
In this case, since the workpiece 100 can be transferred between the first arm 30 and the second arm 40 as the second arm 40 moves to the machining position, the manufacturing efficiency can be improved.

  Further, in the present embodiment, the holding claws 41b of the elastic clamping portion 40c (the clamping piece 41) abut on the outer peripheral surface of the support shaft 103 at three locations in the circumferential direction, so that at a desired position in the elastic clamping portion 40c. The workpiece 100 can be stably held.

  Furthermore, each arm 30, 40 holds the support shaft 103 of the workpiece 100, so that the disk portion 101 (processed portion) can be greatly protruded from each arm 30, 40. Thereby, in the processing step, it is possible to secure a single processing region while suppressing interference between the arms 30 and 40 and the wire 15.

Moreover, since each arm 30 and 40 clamps the support shaft 103 by the some clamping pieces 31 and 41 spaced apart in the Z direction, the inclination of the workpiece | work 100 to the direction which cross | intersects a Z direction can be suppressed.
In particular, by dividing the second arm 40 into a plurality of clamping pieces 41, each clamping piece 41 can be flexibly deformed according to the shape and position of the workpiece 100 (support shaft 103), and further operability can be achieved. Can be provided.

  Further, since the sandwiching pieces 31 and 41 are alternately arranged in the Z direction, at the time of delivery, the sandwiching pieces 31 and 41 are overlapped in the Z direction while being alternately engaged with each other. Therefore, each clamping piece 31 and 41 can be made to approach in Z direction, and the moment which acts on the workpiece | work 100 at the time of delivery can be made small. Therefore, at the time of delivery, the inclination of the workpiece 100 in the direction intersecting the Z direction is suppressed, and more accurate positioning is possible.

  And in the processing method and processing program of this embodiment, while processing the workpiece | work 100 using the processing apparatus 10 mentioned above, while improving manufacturing efficiency, the outline of a workpiece | work can be processed with high precision.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the wire cut electric discharge machining has been described as an example of the method of forming the contour of the workpiece 100 while the workpiece 100 and the processing unit 12 (wire 15) move relatively on the XY plane. Not limited to this. For example, the configuration of the present invention may be adopted for laser cutting processing, water jet processing, and the like.
Further, when the workpiece 100 and the wire 15 are relatively moved on the XY plane, the workpiece 100 (work holding mechanism 20) side may be moved or the wire 15 side may be moved, and the workpiece 100 side and the wire 15 side may be moved. Both of them may be moved.

In the above-described embodiment, the configuration in which the first arm 30 clamps the support shaft 103 of the workpiece 100 has been described. However, the configuration in which the support shaft 103 can be firmly held (not moved when delivered to the second arm 40). Configuration), the design can be changed as appropriate.
Further, the second arm 40 may be configured to be rotatable on the XY plane using a connecting pin or the like extending in the Z direction.
Moreover, the fixing method of each arm 30 and 40 is not restricted to embodiment mentioned above, A various structure is employable.

Furthermore, in the above-described embodiment, the case where both the processing regions H1 and H2 are 180 ° or more has been described, but the total of both processing regions H1 and H2 may be 360 ° or more. In addition, the whole periphery of the workpiece | work 100 can be processed more smoothly by making the both ends of process area H1, H2 overlap like this embodiment.
In the above-described embodiment, the configuration for holding the support shaft 103 of the workpiece 100 has been described. However, the configuration is not limited thereto.

In the above-described embodiment, the configuration in which the processing apparatus 10 is automatically operated by the operation of the control unit 16 has been described. However, the work holding mechanism 20 may be manually operated.
Furthermore, although embodiment mentioned above demonstrated the structure which divided | segmented the workpiece | work holding | maintenance part 30c and the elastic clamping part 40c into the several clamping pieces 31 and 41, it is not restricted to this. You may comprise the workpiece holding part 30c and the elastic clamping part 40c by a single number, respectively.

DESCRIPTION OF SYMBOLS 10 ... Processing apparatus 12 ... Processing part 16 ... Control part 30 ... 1st arm 31 ... Clamping piece 40 ... 2nd arm 40c ... Elastic clamping part 41 ... Clamping piece 41a ... Receiving part 41b ... Holding claw 100 ... Workpiece 103 ... Support shaft

Claims (7)

A processing apparatus that processes the contour of the workpiece by a processing portion that passes through the processing position in the first direction and is relatively movable in an in-plane direction intersecting the first direction with respect to the workpiece,
A first arm that is capable of advancing and retreating with respect to the processing position, and holding the workpiece in a state of protruding in an in-plane direction;
A second arm having an elastic clamping portion that is movable in an in-plane direction and that clamps the workpiece held by the first arm in a state of projecting in the in-plane direction along with the movement toward the processing position. When,
And a fixing unit that fixes the second arm at the processing position. The elastic clamping portion has a receiving portion that opens toward the processing position and receives the workpiece,
The processing apparatus according to claim 1, wherein holding claws that contact the outer peripheral surface of the workpiece at three locations in the circumferential direction are disposed in the elastic clamping portion.   The said 1st arm and the said 2nd arm clamp the support shaft which protrudes toward a 1st direction from the part located inside an in-plane direction rather than the said outline among the said workpiece | work. The processing apparatus according to 1 or 2.   The said 1st arm and the said elastic clamping part are each provided with the some clamping piece arrange | positioned at intervals in the 1st direction, The Claim 1 characterized by the above-mentioned. Processing equipment.   The processing apparatus according to claim 4, wherein the clamping pieces on the first arm side and the clamping pieces on the elastic clamping unit side are alternately arranged in the first direction. A processing method using the processing apparatus according to any one of claims 1 to 5,
A first machining step for machining the workpiece while relatively moving the workpiece held by the first arm and the machining section in an in-plane direction;
A transfer step of moving the second arm toward the machining position and clamping the workpiece by the elastic clamping unit in accordance with the movement toward the machining position;
A positioning step of positioning the second arm at the processing position by the fixing portion;
A retracting step of retracting the first arm from the processing position;
A processing method comprising: a second processing step of processing the workpiece while relatively moving the workpiece sandwiched by the elastic clamping portion and the processing portion in an in-plane direction. A control unit for operating the machining apparatus according to any one of claims 1 to 5,
A first machining step for machining the workpiece while relatively moving the workpiece held by the first arm and the machining section in an in-plane direction;
A transfer step of moving the second arm toward the machining position and clamping the workpiece by the elastic clamping unit in accordance with the movement toward the machining position;
A positioning step of positioning the second arm at the processing position by the fixing portion;
A retracting step for retracting the first arm from the processing position;
A machining program for executing a second machining step for machining the workpiece while relatively moving the workpiece held by the elastic clamping portion and the machining portion in an in-plane direction.

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