JPH0760537A - Machining device and work positioning method in work machining device - Google Patents

Abstract

PURPOSE:To apply machining in a direction along a reference surface of machining easily and correctly to a subject part of a work constantly by moving the work held by a work holding means propertly to apply a specific end surface of it to an abutting surface of a positioning member to be engaged with it. CONSTITUTION:An abutting surface of a positioning member 70 is set on a positioning position set for a machining reference surface of a tool 45. A work W held by a work holding means 30 is then moved to get closer to the abutting surface of the positioning member 70, and a specific end surface of the work W is applied to the abutting surface to be engaged with it. After that, the work W is disposed in a machining attitude with a work moving means stopped. In this condition, the tool 45 is used for a subject part of the work W for applying machining in a direction along the machining reference surface. The work W can thus be positioned and disposed correctly to the positioning member 70 regardless of a holding position or holding height of the work W to the work holding means 30 constantly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to machining in which a workpiece placed in a machining posture is subjected to machining such as cutting and grinding in a direction along a machining reference plane by using a machining tool. The present invention relates to a method for positioning a work in an apparatus and a processing apparatus.

[0002]

2. Description of the Related Art For example, in a cast work, since an excess portion is formed at a portion corresponding to a sprue or a weir, it is necessary to cut off the excess portion before assembling in the assembling step. Therefore, conventionally, the work is placed and held on the jig in a manner in which the surplus portion is directed upward,
From this state, a cutting tool such as a cutter is applied to cut off the surplus portion along a predetermined machining reference plane.

Generally, in a processing apparatus applied to this type of work, the jig and the cutter are moved relative to each other to dispose the jig and the cutter at preset processing positions. When the positioning is confirmed, the cutter is driven to cut off the surplus portion such as the sprue and weir described above along the machining reference surface of the cutter.

[0004]

By the way, in the above-described conventional machining apparatus, since the workpiece and the machining tool are positioned through the jig, the holding position of the workpiece with respect to the jig and the holding position of the workpiece. The height deviation directly affects the machining accuracy greatly.

In particular, in the above-mentioned cast-molded work, the peripheral edge of the surface that is to be in contact with the jig, that is, the surface opposite to the surface on which the sprue or weir is formed is used. Since "burrs" and "burrs" are prominently generated in the peripheral portion, the posture when placed and held on a jig is not stable, and it becomes extremely difficult to accurately cut off the sprue and weir.

In view of the above situation, an object of the present invention is to provide a machining apparatus and a method for positioning a workpiece in the machining apparatus that can easily and accurately machine a workpiece.

[0007]

A machining apparatus according to the present invention is a machining apparatus for machining a work piece placed in a machining posture in a direction along a machining reference plane using a machining tool. , A work holding means for holding the work in a state where the particular end surface of the work and the processed portion are always exposed, and a work held by the work holding means is moved in a direction intersecting with the particular end surface. The work moving means to be moved and the contact surface thereof are arranged on the moving range of the work in association with the operation of the work moving means in such a manner as to occupy the preset positioning position. By abuttingly engaging the specific end surface and restricting the movement of the work, when the work is placed in the working posture, the working reference surface of the work part of the work is applied to the working tool. And a positioning member to meet the reference plane.

The method for positioning a workpiece in a machining apparatus according to the present invention is applied to a machining apparatus that uses a machining tool to machine a work piece placed in a machining posture in a direction along a machining reference plane. And a step of occupying the contact surface of the positioning member at a preset positioning position with respect to the machining reference surface of the machining tool, and the work held by the work holding means with respect to the contact surface of the positioning member. And moving the workpiece in close contact with the contact surface to bring the specific end surface of the workpiece into contact with the contact surface, and arranging the workpiece in the processing posture with the workpiece moving means stopped.

[0009]

According to the above construction, the work held by the work holding means is appropriately moved so that the specific end surface of the work is brought into abutting engagement with the abutting surface of the positioning member. The work is always accurately positioned with respect to the positioning member regardless of the holding position and the holding height.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing an embodiment. 1 to 3 conceptually show a processing apparatus according to the present invention. The processing apparatus illustrated here is arranged on the casting molding line of a cylinder head for an aluminum motorcycle, and is shown in FIGS.
As shown in FIG. 2 (b), it is applied when the surplus portion WC formed in the portion corresponding to the gate and the weir on the cylinder block mounting surface WB side in the cylinder head rough material W is cut off. As shown in FIG. 3, the work carrying-in passage 10 is provided on the center line of the apparatus main body 1 constituted by a plurality of frames. The work carrying-in passage 10 is constructed by laying a pair of carrying-in rail members 11 and 11 in parallel and horizontally over a region from the central portion of the apparatus body 1 to the outside thereof. The loading cylinder member 12 is provided at a portion located between the loading rail members 11 and 11, and the jig carriage 13 is provided above the loading cylinder actuator 12.

As shown in FIGS. 2 and 3, the loading cylinder actuator 12 has a connecting rod 14 at the distal end of the operating rod, and its entire length is the work loading path 10.
Of the cylinder body 12a is fixed to the center of the apparatus body 1, and the tip of the connecting rod 14 is located at the starting end side of the work carrying-in passage 10. Is arranged along the extending direction of the work carrying-in passage 10.

As shown in FIGS. 1, 6 and 8, the jig carriage 13 is provided with a reference plate 15 provided between the upper ends of the pair of loading rail members 11 and 11, and above the reference plate 15. The rotary plate 16 is provided side by side in the area, and the moving plate 17 is provided side by side on the surface side of the rotary plate 16, and is movable in the direction along the work loading passage 10 via the reference plate 15. It is installed in.

The reference plate 15 has a width almost the same as that of the work carrying-in passage 10 and the work carrying-in passage 10 is provided.
It has a rectangular flat plate shape elongated along the extending direction of the above, and is pivotally attached to the connecting rod 14 of the carrying-in cylinder actuator 12 through a connecting bracket 18 provided on the lower surface thereof.

The rotating plate 16 is the reference plate 1 described above.
It has a rectangular flat plate shape having a width and a length smaller than 5, and has shaft members 19 at both ends along the extending direction of the work carrying-in passage 10, and these shaft members 19 are respectively referred to as the reference plates. In a state where the shaft member 19 is fitted and inserted into the bearing portion 21 of the support body 20 which is erected from both end portions of the upper surface of the reference numeral 15, and the one shaft member 19 is connected to the drive shaft 22a of the rotary actuator 22 held by the support body 20. In the upper region of the reference plate 15, the shaft members 19 are rotatably arranged around the axes thereof.

As is apparent from FIGS. 6 and 8, the rotary plate 16 is provided with a positioning cylinder actuator 23 at the center thereof, and rods are provided on both sides of the positioning cylinder actuator 23, respectively. A brake 24 is provided, and guide bushes 25 are provided at four corners of the brake 24, respectively. The positioning cylinder actuator 23 is attached to the back surface of the rotary plate 16 via the front end of the cylinder body 23a in a manner orthogonal to the rotary plate 16, and the front end of the operating rod 23b thereof is mounted on the rotary plate 16. It projects from the surface of the rotary plate 16 through an insertion hole 16a formed in the center of the. The rod brake 24 and the guide bush 25 respectively extend along the extending direction of the positioning cylinder actuator 23, and their respective center holes are aligned with the guide holes 16b and 16c formed in the rotary plate 16. ,
Further, the rotary plate 16 is attached to the rotary plate 16 in such a manner as to project from the back surface of the rotary plate 16. It should be noted that, as shown by the solid line in FIG. 9, the rotating plate 16 is in a normal state in abutting engagement with a horizontal stopper 26 protruding from the upper surface of the reference plate 15 via the lower surface thereof. It is held with its surface facing upward.

The moving plate 17, as shown in FIG.
A flat plate shape having a base portion 17a formed to have a width and a length smaller than that of the rotating plate 16 and a pair of holding portions 17b protruding outward from both sides of the central portion of the base portion 17a in a U shape. In the state where the operation rod 23b of the positioning cylinder actuator 23 is fixed to the rear surface of the central portion of the rotary plate 16, the rotary plate 16 is parallel to the front surface side of the rotary plate 16.
It is arranged so as to be movable in the direction in which it approaches and separates. As clearly shown in FIG. 8, on the back surface of the moving plate 17, brake rods 27 are provided at portions corresponding to the rod brakes 24, and guide rods are provided at portions corresponding to the guide bushes 25. 28 are provided, each brake rod 27 is inserted through the center hole of the corresponding rod brake 24, and each guide rod 28 is inserted through the center hole of the corresponding guide bush 25.

As is apparent from FIGS. 6, 7 and 9, the movable plate 17 is provided with the pair of holding portions 17b and the clamping cylinder actuators 2 respectively.
9 are provided. The clamp cylinder actuator 29 has individual actuating rods 29a protruding from the surface of the moving plate 17, and is attached to the rear surface side of the holding portion 17b via the respective cylinder bodies 29b in a manner orthogonal to the moving plate 17. The clamper holder 30 is provided at the tip of each actuating rod 29a. The clamper holder 30 has clamp levers 31 held on the respective tip surfaces thereof, is swingably supported by the operating rods 29a of the clamp cylinder actuators 29 via the respective base end portions thereof, and is also supported by the clamp rod holders 30. When the tip portion is pivotally attached to the connecting portion 33 provided on the moving plate 17 via the link 32, and the clamp cylinder actuator 29 is fully extended,
As shown by the solid line in FIG. 7, the clamp levers 31 are arranged so as to be closed with respect to the front surface side of the moving plate 17, while the clamp cylinder actuator 2 is provided.
When 9 is most retracted, the clamp levers 31 serve to open the clamp plates 31 with respect to the front side of the moving plate 17, as indicated by the chain double-dashed line in the figure.

Reference numerals 34 and 35 in FIG. 3 denote a damper and a carriage detection sensor arranged at a height corresponding to the reference plate 15 of the jig carriage 13, and both ends of the work carrying-in passage 10 at the beginning and end. Each pair is disposed in the section.
Further, reference numeral 36 in FIG. 6 is a jig plate attached to the upper surface of the moving plate 17, and the cylinder head rough material W is placed on the jig plate 37 through a plurality of jig blocks 37 provided on the upper surface. It Further, reference numerals 38 and 3 in FIG.
9 is a clamp held by the moving plate 17 and operated by a switch rod 40 attached to a support portion between the operating rod 29a of the clamp cylinder actuator 29 and the clamper holder 30, as shown in FIG. It is a detection sensor pair.

Further, as shown in FIG. 1 and FIG. 3, the above-mentioned machining apparatus has the work carrying-in passage 1 in the apparatus body 1.
A cutter unit 41 is provided at a position located on the side of 0. The cutter unit 41 is rotatably supported by a cutter base 42 formed in the shape of a rectangular flat plate and a bearing body 43 on the upper portion of the cutter base 42, and the rotation axis thereof extends in the extending direction of the work carrying-in passage 10. And a spindle 44 that is horizontally arranged in a manner orthogonal to the above, and has a disk shape, and is fixed to the projecting end portion of the spindle 44 that is located on the workpiece loading passage 10 side in such a manner that the mutual axial centers thereof match. Rotating cutter 4
5 and the belt 4 attached to the upper part of the bearing body 43.
6 and a cutter drive motor 47 connected to the main shaft 44 via the cutter shaft 42, and is movable via a cutter base 42 along a cutter shift passage 48 provided on the side of the workpiece carry-in passage 10. It is arranged. The cutter shift passage 48 is extended in a direction parallel to the workpiece loading passage 10 by laying a pair of shift rail members 49 in parallel and horizontally, like the workpiece loading passage 10. The shift cylinder actuator 50 is provided at a portion located between the pair of shift rail members 49. As shown in FIG. 3, the shift cylinder actuator 50 has a connecting rod 51 at the distal end of the operating rod, and the entire length thereof is substantially the same as the entire length of the cutter shift passage 48. The cutter shift passage 48 is fixed to the apparatus main body 1 via the tip portion of the cylinder body 50a thereof along the extending direction, and is connected to the lower surface of the cutter base 42 via the tip portion of the connecting rod 51. ing.

As clearly shown in FIG. 1, the cutter shift passage 48 carries in the work so that the main shaft 44 of the rotary cutter 45 in the cutter unit 41 is disposed above the rotary shaft center of the rotary plate 16. It is arranged at a position higher than the passage 10, and as shown in FIG. 11A, a distance L is provided between the machining reference plane C of the rotary cutter 45 and the rotation axis of the rotation plate 16. It is arranged apart from the work carrying-in passage 10.

Further, as shown in FIGS. 1 and 2, the processing apparatus is provided with a loader traveling passage 52 in an upper region thereof so as to cover the terminal end portion of the above-mentioned work carrying-in passage 10. The loader traveling passage 52 extends in a direction orthogonal to the work carrying-in passage 10 by laying a pair of traveling rail members 53 horizontally and in parallel with each other. As shown, a traveling cylinder actuator 54 is provided at a site located between the pair of traveling rail members 53, and a loader support body 55 is provided above the traveling cylinder actuator 54.

The traveling cylinder actuator 54 is pivotally attached to the frame constituting the apparatus body 1 via the base end portion of the cylinder body, and is arranged along the extending direction of the loader traveling passage 52. There is.

Although not explicitly shown in the figure, the loader support 55 is formed in a rectangular flat frame shape by appropriately combining a plurality of support frames, and extends along the extending direction of the loader travel passage 52. It is movably arranged and is connected to the operating rod 54a of the traveling cylinder actuator 54 through a connecting bracket 56 provided on the lower surface thereof, and lifting cylinder actuators 57 and 58 are provided at both ends thereof. ing. These elevating cylinder actuators 57, 58 are arranged in parallel along the extending direction of the loader travel passage 52 with the respective operating rods 57a, 58a facing vertically downward, as shown in FIG. The hand unit 5 is attached to the operating rod 57a of the one arranged on the side of the work carrying-in passage 10 (hereinafter, simply referred to as the first lifting cylinder actuator 57).
9, and a positioning unit 60 is held on an operating rod 58a of one that is arranged on the side of the cutter unit 41 (hereinafter, simply referred to as a second lifting cylinder actuator 58).

As shown in FIG. 5, the hand unit 59 has a hand body 61 held by the operating rod 57a of the first lifting cylinder actuator 57, and extends downward from both sides of the hand body 61. Is
A pair of hands 62 arranged so as to be capable of expanding each other, and a pair of opening / closing cylinder actuators 63 held by the hand body 61 and having respective operating rods connected to the base ends of the corresponding hands 62. It is arranged so that it can be moved downward with respect to the loader support body 55 by the operation of the first lifting cylinder actuator 57. The hand unit 59 also includes a disc-shaped hand dog 65 at the tip of a guide rod 64 protruding from the upper surface of the hand body 61. The hand dog 65 is for driving the hand descending position detection sensor 66 provided on the loader support 55, and is used for the pair of hands 6 described above.
When the tip end of 2 is arranged slightly above the jig plate 36 on the upper surface of the moving plate 17, the peripheral surface thereof is provided at a height position facing the detection surface of the hand descending position detection sensor 66. ing. Incidentally, reference numeral 6 in FIG.
Reference numeral 7 denotes a hand raised position detection sensor for detecting a state in which the first lifting cylinder actuator 57 is most retracted through the first switch dog 68 arranged on the loader support 55.

The positioning unit 60 has a rectangular flat plate-shaped pin holding plate 69 having a size sufficient to cover the cylinder block mounting surface WB of the cylinder head rough material W.
And a plurality of positioning pins arranged in parallel with each other in such a manner as to project at a right angle from the surface of the pin holding plate 69 and arranged at a portion corresponding to the bolt insertion hole WH (shown in FIG. 12) of the cylinder head rough material W. 70, and these positioning pins 70 are held by the operating rod 58a of the second lifting / lowering cylinder actuator 58 via the pin holding plate 69 in a manner in which the positioning pins 70 are directed vertically downward.
As is clear from the figure, these positioning pins 70
Are formed with a small diameter such that their respective tip portions are fitted in the bolt insertion holes WH of the cylinder head rough material W, and the positioning contact along the horizontal direction is provided on the step portion between the small diameter portion. The contact surface 71 is configured. Further, the positioning unit 60 is provided with a disc-shaped positioning dog 73 at the tip of the sensor drive pin 72 projecting from the back surface of the pin holding plate 69. The positioning dog 73 is a pin lowering position detection sensor 7 provided on the loader support 55.
11 for driving the No. 4 and as shown in FIG. 11 (a), when the distance L between the positioning contact surface 71 and the rotation axis of the rotation plate 16 is the peripheral surface thereof. Is provided at a height position facing the detection surface of the pin lowering position detection sensor 74. Incidentally, reference numeral 75 in FIG.
Is a pin raised position detection sensor for detecting a state in which the second lifting cylinder actuator 58 is most retracted through the second switch dog 76 provided on the loader support 55. In addition, reference numerals 77 and 7 in FIG.
Reference numeral 8 denotes a damper and a loader detection sensor which are arranged at a height corresponding to the outer side surface of the loader support 55, and are arranged at both ends of the loader travel passage 52 at the beginning and end.

As shown in FIGS. 1 and 3, in the processing apparatus, the cylinder head coarse material W is placed at a position lower than the work loading path 10 in a manner parallel to the work loading path 10. Roller conveyor 7 for carrying out
9 is provided. In addition, a work unloading elevator 81 for communicating between the moving plate 17 on the work loading path 10 and the roller conveyor 79 via a lifting platform 80 that moves in the vertical direction beside the work loading path 10. Is attached.

In the processing apparatus configured as described above, the above-described loading cylinder actuator 12 is most extended and the jig carriage 13 is installed in the apparatus main body as shown by the chain double-dashed line in FIGS. 2 and 3. The state of being placed outside 1 is the standby state for activation. At this time, the positioning cylinder actuator 23 and the pair of clamping cylinder actuators 29 attached to the jig carriage 13 are held in the most retracted state, as shown in FIG.
, The moving plate 17 is arranged at the position closest to the rotating plate 16, and each clamp lever 31 is placed on the surface side of the moving plate 17, as indicated by the chain double-dashed line in the figure. It is located in the open position.

At this time, the cutter unit 41
As shown in FIGS. 2 and 3, the shift cylinder actuator 50 is extended to the farthest from the end of the work carrying-in passage 10 by the maximum extension operation, while the hand unit 59 and the positioning unit 6 are arranged.
As shown in FIG. 1, 0 is arranged at the uppermost position by the most retracting operation of each of the lifting cylinder actuators 57 and 58, and further, the most extending operation of the traveling cylinder actuator 54 and the pair of opening / closing cylinders. The pair of hands 62 are arranged in the upper region of the lifting platform 80 in the work unloading elevator 81 described above in a state where the pair of hands 62 are expanded by the maximum extension operation of the actuator 63.

When a start switch (not shown) is turned on from the above-described start standby state, first, the cylinder head rough material W cast and formed in the previous step is operated by a work supply loader (not shown), and the cylinder block mounting surface thereof. It is arranged on the jig plate 36 via the jig block 37 with the WB facing upward.

When it is confirmed by the work detection sensor (not shown) that the cylinder head rough material W is arranged on the jig plate 36, the pair of clamp cylinder actuators 29 are respectively extended to operate each clamp. The lever 31 is closed and moved with respect to the front surface side of the moving plate 17, and the cylinder head coarse material W placed on the jig plate 36 is clamped to the moving plate 17 by these clamp levers 31.

When it is confirmed from the output signals from the clamp detecting sensor pair 38, 39 that the cylinder head coarse material W is held on the jig plate 36 by the clamp lever 31, then the carry-in cylinder actuator 12 is carried out. By the degenerate operation of the jig carriage 13
Is carried into the inside of the apparatus main body 1, and the jig carriage 13 is stopped and arranged at the end of the work carrying-in passage 10. At this time,
The jig carriage 13 is positioned and arranged at a position where the axis of the bolt insertion hole WH in the cylinder head rough material W clamped to the moving plate 17 matches the axis of the positioning pin 70.

When the carriage detection sensor 35 confirms that the cylinder head coarse material W has been carried in, as shown in FIG. 11A, this time, the second lifting cylinder actuator 5 is moved.
By the extension operation of 8, the positioning contact surface 71 of the positioning pin 70 is occupied at the position separated from the rotation axis of the rotary plate 16 by the distance L, and then the extension operation of the positioning cylinder actuator 23 is started. To be done.

The positioning cylinder actuator 2
When the extension operation of No. 3 progresses, the bolt insertion hole W of the cylinder head rough material W clamped to the moving plate 17 is eventually provided.
By inserting the tip of the positioning pin 70 into H, the bolt insertion hole WH in the cylinder head rough material W is inserted.
The peripheral upper end surface WT of the above is brought into contact with and engaged with the positioning contact surface 71, and as shown in FIG. 11B, the extension operation of the positioning cylinder actuator 23 is stopped by the positioning pin 70.

When the operation of the positioning cylinder actuator 23 is stopped, the rod brake 24 is immediately actuated to restrict the movement of the brake rod 27, and the moving plate 1 is moved through the brake rod 27.
7 is the position, that is, the upper end surface WT around the bolt insertion hole WH in the rough material W of the cylinder head is positioned and abutment surface 71.
Is locked at the position where it is brought into contact with and engaged with.

When the operation of the rod brake 24 is confirmed by a detection means (not shown), the second lifting cylinder actuator 58 is retracted to return the positioning pin 70 to the start standby position, and the positioning is performed. The tip portion of the pin 70 is the cylinder head rough material W.
Separated from ten.

When it is confirmed by the pin lifted position detection sensor 75 that the positioning pin 70 has returned to the start standby position, this time the rotary actuator 22 operates as shown in FIG.
1 (b), the rotary plate 16 is driven to rotate counterclockwise, and the rotary plate 16 is attached to the vertical stopper 82 provided on the upper surface of the reference plate 15 via the lower surface thereof, as shown by the chain double-dashed line in FIG. By abutting and engaging, FIG.
As shown in (c), the posture of the rotary plate 16 is changed to a state along the vertical direction.

At this time, as described above, the distance between the rotation axis of the rotation plate 16 and the positioning contact surface 71 of the positioning pin 70 is the rotation axis of the rotation plate 16 and the machining reference of the rotation cutter 45. Since it is set to the same distance L as that between the surface C and the surface C, the cylinder head rough material clamped on the moving plate 17 is irrespective of the displacement of the clamp position or the height of the cylinder head rough material W on the moving plate 17. The upper end surface WT around the bolt insertion hole WH in the material W is always reliably matched with the processing reference surface C of the rotary cutter 45 in the cutter unit 41.

When the rotary plate 16 is arranged in a posture along the vertical direction, the cutter drive motor 47 is then moved.
Is rotationally driven, and when the shift cylinder actuator 50 starts the retracting operation, the rotary cutter 45 is moved along the machining reference plane C,
A surplus portion WC formed at a portion corresponding to the gate and the weir on the cylinder block mounting surface WB side in the cylinder head rough material W has an upper end surface WT around the bolt insertion hole WH.
Are sequentially excised along. At this time, according to this processing apparatus, since the rotary cutter 45 cuts off the excess portion WC with the posture along the vertical direction, the excess portion W is removed.
The chips from C are in the water jacket WW of the cylinder head coarse material W, in the combustion chamber WN, or in the jig carriage 13 described above.
It is possible to prevent as much as possible from invading the movable part of the.

Excessive portion WC of the cylinder head rough material W
Is cut off, the rotary actuator 22 is driven to rotate in the opposite direction to the above, whereby the rotary plate 16 is returned to the horizontal state, and the rod brake 2
4 is released, the positioning cylinder actuator 23 is retracted to the maximum so that the moving plate 17 is returned to the start standby position, and the pair of clamping cylinder actuators 29 is moved to the maximum retracted position to move the moving plate. The clamped state of the cylinder head rough material W with respect to 17 is released. During this time,
The cutter unit 41 is returned to the starting standby position by the cutter driving motor 47 stopping and the shift cylinder actuator 50 retracting.

When it is confirmed by the clamp detection sensor pair 38, 39 that the clamped state of the cylinder head rough material W by the clamp lever 31 is released, the traveling cylinder actuator 54 is fully retracted and the loader travels. The pair of hands 62 of the hand unit 59 are arranged in the upper region of the jig carriage 13 by the movement of the loader support body 55 in the passage 52. Further, from this state, after the first elevating cylinder actuator 57 is fully extended, the opening / closing cylinder actuator 63 is retracted to hold the cylinder head coarse material W between the hands 62.

When the cylinder head coarse material W is sandwiched and held between the hands 62, the traveling cylinder actuator 54 is extended most after the first elevating cylinder actuator 57 is fully retracted. The head rough material W is arranged in the upper region of the lifting table 80 in the work unloading elevator 81, and further, after the first lifting cylinder actuator 57 performs the maximum extension operation, the opening / closing cylinder actuator 63 performs the maximum extension operation to cause the cylinder to move. The head rough material W is transferred onto the upper surface of the lift table 80.

When the rough material W of the cylinder head is transferred to the lift table 80, the first lift cylinder actuator 57 is moved.
Is retracted to the maximum, and the processing apparatus is returned to the start standby state. The cylinder head rough material W transferred to the lift 80 is placed at the same height as the roller conveyor 79 by the downward movement of the lift 80, and then the roller conveyor 7 is moved.
It is transferred to the printer 9 and carried out to the next step (not shown).

After that, the above-mentioned operation is repeated, and the surplus portion WC formed on the cylinder head rough material W is always cut along the same machining reference plane.

In the processing apparatus, the surplus portion WC of the cylinder head rough material W is cut along the upper end surface WT around the bolt insertion hole WH, but the contact surface 71 of the positioning pin 70 is cut off. If it is arranged at a position at a distance L-α from the axis of rotation of the rotary plate 16, the upper end surface WT
It is possible to cut off the surplus portion WC at a position where the machining allowance α is secured.

In the above embodiment, the processing apparatus applied when the surplus portion of the cast cylinder head coarse material corresponding to the sprue and the weir is cut off by the rotary cutter is exemplified. The present invention is not limited to these, and can be applied to other workpieces that are processed other than cutting.

Further, in the above embodiment, the pin is exemplified as the positioning member, but a positioning member having another shape may be used. Further, although the contact surface of the positioning member and the machining reference surface of the machining tool are arranged so as to be orthogonal to each other, they may intersect with each other at an angle other than 90 °, or they may be arranged in parallel with each other. Of course it doesn't matter.

[0047]

As described above, according to the present invention,
Since the work held by the work holding means is appropriately moved to bring the specific end surface into contact with the contact surface of the positioning member, regardless of the work holding position or the holding height of the work with respect to the work holding means. , The work is always accurately positioned with respect to the positioning member. Therefore, if the contact surface of the positioning member is occupy in a position corresponding to the machining reference surface of the machining tool in advance, the workpiece to be machined in the machining posture is always in the direction along the machining reference surface. Accurate machining can be performed.

[Brief description of drawings]

FIG. 1 is a side view conceptually showing an embodiment of a processing apparatus according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged side view conceptually showing a positioning member and a loader applied to the embodiment.

5 is a cross-sectional view of main parts of the positioning member and the loader shown in FIG.

FIG. 6 is an enlarged plan view conceptually showing the work holding means applied to the embodiment.

7 is a sectional view taken along line VII-VII in FIG.

8 is a sectional view taken along line VIII-VIII in FIG.

9 is a view taken along the arrow IX in FIG.

10 is a sectional view taken along line XX in FIG.

11A to 11C are conceptual diagrams sequentially showing a method of positioning a work in the processing apparatus shown in FIG.

12A and 12B conceptually show a work applied to the embodiment, where FIG. 12A is a side view and FIG. 12B is a plan view.

[Explanation of symbols]

 17 ... Moving plate 22 ... Rotary actuator 23 ... Positioning cylinder actuator 24 ... Rod brake 27 ... Brake rod 29 ... Clamping cylinder actuator 30 ... Clamper holder 31 ... Clamp lever 32 ... Link 33 ... Connection part 36 ... Jig plate 37 ... jig block 45 ... rotary cutter 55 ... loader support 59 ... hand unit 70 ... positioning pin 71 ... contact surface C ... machining reference surface W ... cylinder head rough material WC ... surplus portion WT ... upper end surface

Claims (5)

[Claims] 1. A machining apparatus for machining a workpiece to be machined in a machining posture in a direction along a machining reference plane by using a machining tool, wherein a specific end surface of the workpiece and the workpiece are machined. Work holding means for holding the work in a state where they are always exposed, work moving means for moving the work held by the work holding means in a direction intersecting the specific end surface, and abutting surface thereof It is arranged on the movement range of the work accompanying the operation of the work moving means in a manner of occupying the set positioning position, and abuts and engages with the specific end surface through the corresponding contact surface, By restricting movement,
A processing apparatus, comprising: a positioning member for aligning a processing reference surface of a portion to be processed in the workpiece with the processing reference surface of the processing tool when the workpiece is arranged in the processing posture. 2. The machining reference surface of the machining tool is arranged along the vertical direction, and the machining reference surface of the machining tool and the contact surface of the positioning member intersect each other, and the work moving means. Is arranged rotatably around an axis parallel to both the machining reference surface of the machining tool and the contact surface of the positioning member, and the contact surface of the positioning member and the specific end surface of the workpiece are The processing apparatus according to claim 1, wherein the workpieces are arranged in the processing posture by appropriately rotating the workpiece moving means after the workpieces are brought into contact with each other and engaged. 3. The method is applied to a work in which the specific end surface and the processing reference surface of the processed portion are parallel to each other, and the contact surface of the positioning member is arranged along the horizontal direction. The processing apparatus according to claim 2, wherein the work moving means is rotated by 90 ° after the contact surface of the positioning member and the specific end surface of the work are brought into contact with each other. 4. A loader for unloading the work held by the work holding means after the completion of processing is provided, and the positioning member is arranged at a horizontal moving portion of the loader. The processing device described. 5. The present invention is applied to a machining device for machining a workpiece to be machined placed in a machining posture in a direction along a machining reference plane by using a machining tool, wherein the contact surface of a positioning member is machined as described above. The step of occupying the preset positioning position with respect to the machining reference surface of the tool, and the work held by the work holding means is moved closer to the contact surface of the positioning member to move the specific end surface of the work. A method of positioning a work in a processing apparatus, comprising: a step of bringing the work into contact with the abutment surface; and a step of placing the work in the working posture with the work moving means stopped.