JP5512354B2 - Method and apparatus for machining rod-shaped workpiece - Google Patents

Description

  The present invention relates to a processing method and apparatus for a rod-shaped workpiece capable of quickly machining two grooves on the outer peripheral surface of the rod-shaped workpiece.

  As a rod-shaped workpiece, for example, a thin rod-shaped needle valve 10 used for an electromagnetic valve or the like is formed as shown in FIG. The needle valve 10 includes a cylindrical valve body 10a, a flange 10b formed at one end of the valve body 10a, and a tapered portion having a smaller diameter toward the tip formed integrally with the other end of the valve body 10a. 10c, a cylindrical small-diameter portion 10d integrally connected to the distal end portion of the tapered portion 10c, and a flange portion 10e integrally formed at the distal end portion of the small-diameter portion 10d. The small-diameter portion 10d and the flange portion 10e are formed with two groove portions 10f separated by 180 °.

  As an apparatus for forming the groove 10f of the needle valve 10, the apparatus shown in FIG. 19 has been proposed. In this cutting apparatus, the clamp mechanism 92 of the needle valve 10 is mounted on the upper surface of the work support table 91, and two places on the outer peripheral surface of the needle valve 10 are moved in the left-right direction by a pair of left and right clamp claws 93, 94 of the clamp mechanism 92. Clamp from. In this clamped state, the groove portion 10f is cut by bringing the rotary tool 14 into contact with one place on the outer peripheral surfaces of the small diameter portion 10d and the flange portion 10e from above.

  On the other hand, what was disclosed by patent document 1 is proposed as a grinding machine of a rod-shaped workpiece. This grinding machine rotates with both ends of the rod-shaped workpiece gripped by the headstock, and a pair of rotating grindstones are approached from both sides of the rod-shaped workpiece to grind the outer peripheral surface of the workpiece.

JP 2005-254333 A

  However, in the cutting apparatus shown in FIG. 19, when cutting the two groove portions 10f, the clamp mechanism 92 releases the clamp of the needle valve 10 after cutting one of the groove portions 10f. Thereafter, in a state where the needle valve 10 is rotated 180 degrees around its central axis, the needle valve 10 is clamped again by the clamp mechanism 92, and the other groove 10f is cut by the rotary tool 14. Eventually, the groove 10f has to be processed in two steps, and there is a problem that the working efficiency cannot be improved.

  Further, since the rotary tool 14 comes into contact with one portion of the needle valve 10, the needle valve 10 is easily deformed. For this reason, the needle valve 10 is deformed, and there is a possibility that the processing accuracy is lowered. Further, when the needle valve 10 is clamped again, the needle valve 10 is not necessarily clamped at an appropriate position, and there is a possibility that the processing accuracy of the two groove portions 10f is lowered.

  On the other hand, in the grinding machine disclosed in Patent Document 1, since the axis of the rod-shaped workpiece and the axis of the rotating grindstone are parallel, the groove portion (FIG. 18) is parallel to the axis of the outer peripheral surface of the rod-shaped workpiece. No groove portion 10f) can be formed.

  The object of the present invention is to solve the above-mentioned problems in the prior art and to rapidly process two groove portions at two locations on the outer peripheral surface of the rod-shaped workpiece and improve the processing accuracy. An object of the present invention is to provide a method and apparatus for processing a rod-shaped workpiece.

In order to solve the above problems, the invention described in claim 1 is characterized in that work gripping mechanisms for gripping the outer peripheral surface of the rod-shaped work are provided at three positions on the index table, and each index table is indexed. The workpiece gripping mechanism is sequentially assigned to the workpiece loading position, machining position, and unloading position, and the workpiece gripping mechanism at the index table machining position grips the outer surface of the rod-shaped workpiece. The gist is that the outer peripheral surfaces of a pair of disk-shaped rotary tools are approached from two opposite directions at two locations, and a bar-shaped workpiece is simultaneously cut into two grooves extending along the axial direction of the workpiece.

According to the second aspect of the present invention, the work gripping mechanism for gripping the outer peripheral surface of the rod-shaped work is provided at three positions on the index table, and each work gripping mechanism is moved to the workpiece loading position as the index table is indexed. Two disc-shaped rotary tools for processing two grooves at the same time at two locations on the outer peripheral surface of the rod-shaped workpiece are arranged on the opposite sides of the workpiece. The axes of the rotary tools are parallel to each other, and the axes are perpendicular to the axis of the rod-shaped workpiece.

According to a third aspect of the present invention, in the second aspect , the work gripping mechanism is provided in a through hole formed in the index table so as to open in the vertical direction, and the rotary tool is inserted from the upper and lower openings of the through hole. The gist is that it is configured to enter toward the workpiece.

According to a fourth aspect of the present invention, in the third aspect , the through hole is opened to the outer peripheral surface of the index table, the open portion of the through hole is closed by the bracket, the through hole is formed, and the inner surface of the bracket Is mounted with a first clamp member for clamping one side of the outer peripheral surface of the workpiece, and a second clamp member is supported on the inner surface of the through hole so as to face the first clamp member. Is the gist.

According to a fifth aspect of the present invention, in any one of the second to fourth aspects, a work transfer device is provided adjacent to the index table, and an arm is provided between the index table and the work transfer device. A holding mechanism for removably holding the workpiece is provided at both ends of the arm so as to be able to turn at the intermediate portion, and the work transfer device is located at the loading station by the attaching / detaching operation of the holding mechanism and the turning operation of the arm. with received pass to the workpiece holding mechanism in the unmachined workpiece to the loading position of the index table, receives and passes out operation output station of machined workpiece workpiece transport device which is gripped by the workpiece holding mechanism in a carry-out position of the index table The gist is what has been done.

According to a sixth aspect of the present invention, in the fifth aspect , the arm holding mechanism shifts the workpiece when the workpiece is loaded into the workpiece gripping mechanism at the loading position of the index table. The gist of the invention is that a shift mechanism is provided for abutting a position regulating member provided on the index table for positioning.

(Function)
In the present invention, two positions on the outer peripheral surface of the bar-shaped workpiece are simultaneously processed by two rotary tools while the outer peripheral surface of the bar-shaped workpiece is gripped at a predetermined position by the workpiece gripping mechanism. For this reason, a workpiece | work can be processed in a short time. In addition, since the two parts of the workpiece are held by the two rotary tools located on the opposite sides of the workpiece, the rod-shaped workpiece is not deformed and the machining accuracy is improved. Moreover, since it is not necessary to change the workpiece, the accuracy of the machining position can be improved. In addition, since the next unprocessed workpiece and processed workpiece can be carried in and out during the operation of processing the workpiece at the processing position with the rotary tool, the work cutting efficiency of the workpiece can be improved. .

  ADVANTAGE OF THE INVENTION According to this invention, while being able to process a double groove part rapidly in two places of a rod-shaped workpiece, processing accuracy can be improved.

The left view which shows one Embodiment which actualized this invention in the cutting system. The perspective view of a workpiece carrying in / out apparatus. The front view of a workpiece carrying in / out apparatus. The top view of a workpiece position switching mechanism. (A) and (b) are partial enlarged plan views for explaining the operation of the clamp mechanism in the carry-out position, and (c) and (d) are partial enlarged planes for explaining the operation of the clamp mechanism in the carry-in position. Figure. The expanded sectional view in the 1-1 line of FIG. The expanded sectional view in the 2-2 line of FIG. The enlarged plan view of the clamp mechanism for carrying in. The top view which shows the relationship between a workpiece | work position switching mechanism and an arm. The top view which shows the relationship between a workpiece | work position switching mechanism and an arm. The perspective view for demonstrating the 1st process of the carrying in / out operation | work of a workpiece | work. The perspective view for demonstrating the 2nd process of carrying in / out operation | work of a workpiece | work. The perspective view for demonstrating the 3rd process of the carrying in / out operation | work of a workpiece | work. The perspective view for demonstrating the 4th process of the carrying in / out operation | work of a workpiece | work. The perspective view for demonstrating the 5th process of the carrying in / out operation | work of a workpiece | work. The perspective view for demonstrating the 6th process of the carrying in / out operation | work of a workpiece | work. Timing chart of workpiece loading / unloading and machining operations. The perspective view of a needle valve. FIG. 6 is a schematic plan view showing a workpiece loading / unloading device of a conventional processing machine.

Hereinafter, an embodiment in which the present invention is embodied in a workpiece cutting system will be described with reference to FIGS.
Initially, the rod-shaped workpiece | work W which is a cutting object is demonstrated. In this embodiment, the workpiece W is the needle valve 10 shown in FIG. In this workpiece cutting system, as shown in FIGS. 6 and 7, a cutting mechanism portion serving as a processing machine is attached to the flange portion 10 e in a state where the valve body 10 a is clamped by a clamp mechanism 31 provided on the index table 25. The groove portion 10f is simultaneously cut by bringing a pair of upper and lower rotary tools 14, 15 into contact with each other.

  Next, a schematic configuration of the workpiece cutting system will be described with reference to FIGS. A workpiece position switching mechanism 21 including an index table 25 that holds an unprocessed workpiece W processed by the rotary tools 14 and 15 is disposed in front of the cutting mechanism portion 11. As shown in FIG. 1, the index table 25 is provided with three clamping mechanisms 31 as gripping mechanisms for clamping the workpiece W. When the index table 25 is pivoted, each clamping mechanism 31 is moved to the workpiece W. The loading position P1, the processing position P2, and the unloading position P3 are determined in this order. On the side of the workpiece position switching mechanism 21, a workpiece transfer device 41 for transferring the workpiece W is installed. The workpiece transfer device 41 is provided with a loading station S1 for the unprocessed workpiece W and a loading station S2 for the processed workpiece W. Above the workpiece position switching mechanism 21 and the workpiece transfer device 41, an operation of loading the unprocessed workpiece W at the loading station S1 into the clamping mechanism 31 at the loading position P1 of the index table 25, and the index table 25 A workpiece loading / unloading device 51 for receiving the processed workpiece W clamped by the clamping mechanism 31 at the unloading position P3 and unloading the workpiece W to the unloading station S2 of the workpiece transfer device 41 is provided. It is installed.

Next, the cutting mechanism unit 11, the workpiece position switching mechanism 21, the workpiece transfer device 41, and the workpiece loading / unloading device 51 described above will be sequentially described.
(Cutting mechanism 11)
A pair of upper and lower motors 12 and 13 shown in FIG. 1 are mounted on a machine base (not shown), and disk-shaped rotating tools 14 and 15 are attached to the rotation shafts of the motors 12 and 13. The rotary tools 14 and 15 are moved up and down by a first lifting mechanism 18 and a second lifting mechanism 19, respectively.

As shown in FIG. 7, the outer peripheral surfaces of the rotary tools 14 and 15 are the outer peripheral surfaces of the small-diameter portion 10d and the flange portion 10e of the needle valve 10 as the workpiece W moved to the machining position P2 by the index table 25. Cutting portions 14a and 15a for simultaneously cutting the groove portion 10f are formed in the upper and lower portions.
(Work position switching mechanism 21)
As shown in FIG. 2, an index table 25 is supported on the upper end portion of the column 22 erected on the floor surface by a rotation support shaft 24 so as to turn around a vertical axis via a bearing 23. Yes. A motor 26 and a speed reducer 27 for rotating the rotation support shaft 24 are attached to the lower portion of the bearing 23. As shown in FIGS. 1 and 4, the table main body 30 of the index table 25 is formed with receiving recesses 30a penetrating in the vertical direction at three locations at intervals of 120 °, and each receiving recess 30a has a work W A clamp mechanism 31 is mounted as a workpiece gripping mechanism for clamping. As described above, each clamp mechanism 31 is sequentially positioned at the loading position P1, the machining position P2, and the unloaded position P3 of the processed workpiece W by indexing the index table 25. Next, the configuration of the clamp mechanism 31 will be described.

  As shown in FIG. 4, a fixed clamp member 35 as a first clamp member is supported on a bracket 34 attached to the outer peripheral surface of the table body 30 so as to close the outer open portion of the housing recess 30 a. Yes. As shown in FIG. 7, the fixed clamp member 35 is formed with a clamp groove 35 b for clamping one side of the outer peripheral surface of the valve body 10 a of the needle valve 10. As shown in FIG. 4, a clamp cylinder 36 is attached to the table main body 30 so as to correspond to the receiving recess 30a. A movable clamp member 38 as a second clamp member is connected to the piston rod 37 of the clamp cylinder 36 so as to face the fixed clamp member 35. The movable clamp member 38 is formed with a clamp groove 38b for clamping the other side of the outer peripheral surface of the valve body 10a of the needle valve 10 as shown in FIG. As shown in FIG. 4, a position restricting member 39 for restricting the axial position of the needle valve 10 is attached to the inner surface of the accommodating recess 30a. A supply nozzle (not shown) for supplying coolant to the workpiece W is provided on the side surface of the housing recess 30a opposite to the position regulating member 39.

As shown in FIG. 1, the rotation axes O14 and O15 of the rotary tools 14 and 15 are set parallel to each other in the same vertical plane. As shown in the partial enlarged view of FIG. 1 (in a circle), in the state where the needle valve 10 is gripped by the clamp mechanism 31 and indexed to the processing position P2, the center axis O10 of the needle valve 10 (in the direction orthogonal to the paper surface) ) And the rotation axis O14, O15 are set to form a right angle. Then, the two grooves 10f along the central axis O10 are cut at 180 ° apart from the small diameter portion 10d and the flange portion 10e of the needle valve 10 by the cutting portions 14a and 15a on the outer periphery of the rotary tools 14 and 15. I have to.
(Work transfer device 41)
As shown in FIG. 1, a support plate 42 is disposed on the floor via a plurality of support columns. A roller 44 is rotatably supported on the upper surface of the support plate 42 via a plurality of brackets 43, and a conveyor belt 45 that is intermittently circulated by a drive mechanism 46 having a motor is hung between the rollers 44. It is disguised. A plurality of pallets 47 for holding the workpiece W are placed on the outer surface of the conveyor belt 45 at regular intervals. The pallet 47 includes a holder 48 having holding grooves 48 a that hold both ends of the needle valve 10. A pair of actuators 50 for allowing the stopper pins 49 to be taken in and out are supported on the support plate 42 via brackets (not shown). When the pallet 47 of the conveyor belt 45 is stopped at the loading station S1 and the unloading station S2, the stopper pin 49 protrudes above the conveyor belt 45 by the actuator 50 in order to position each pallet 47 at the stations S1 and S2. It has come to be.
(Work loading / unloading device 51)
As shown in FIGS. 1 and 3, a horizontal support plate 53 is supported on an upper end portion of a column 52 erected on the floor surface, and a lifting cylinder 57 is fixed to the horizontal support plate 53. . A lifting member 56 is fixed to the lower end of the piston rod 58 of the lifting cylinder 57. The elevating member 56 is guided by the guide rod 55 in the vertical direction.

  As shown in FIG. 3, a turning cylinder 61 made of a rotary cylinder is attached to the lower surface of the elevating member 56, and an intermediate portion of a two-way type arm 63 is connected to the turning shaft 62. The unprocessed workpiece W held on the pallet 47 in the loading station S1 of the workpiece transfer device 41 is received on the lower surface of one tip of the arm 63, and the clamp mechanism 31 in the loading position P1 of the index table 25 is received. A loading clamp mechanism 64 is mounted as a loading holding mechanism for loading into the frame. On the other hand, the processed workpiece W clamped by the clamp mechanism 31 at the unloading position P3 of the index table 25 is received on the lower surface of the other tip of the arm 63, and the pallet of the unloading station S2 of the workpiece transfer device 41 is received. An unloading clamp mechanism 65 for unloading to 47 is mounted. First and second stoppers 66 and 67 are attached to the elevating member 56, and first and second positioning members 68 and 69 are erected on the upper surface of the arm 63. Then, when the first positioning member 68 abuts on the first stopper 66, the position of the loading clamp mechanism 64 corresponding to the pallet 47 of the loading station S1 is restricted. When the second positioning member 69 comes into contact with the second stopper 67, the position of the unloading clamp mechanism 65 is restricted upward corresponding to the pallet 47 of the unloading station S2.

The carry-in clamp mechanism 64 and the carry-out clamp mechanism 65 have the same configuration.
A slide table 71 is attached to the lower surface of the distal end of the arm 63 as shown in FIG. The slide table 71 includes a table main body 72 attached to the lower surface of the arm 63, and a movable table 74 attached to the table main body 72 through two guide rods 73 so as to be able to reciprocate.

  Stop bolts 83 and 84 are screwed into the female screw bodies 81 and 82 attached to one side surface of the table main body 72 so as to face each other with a predetermined interval. A positioning block 85 is attached to one side surface of the movable table 74 so as to be positioned between the stop bolts 83 and 84. The moving stroke of the movable table 74 is set by the stop bolts 83 and 84 and the block 85.

  2 and 3, a clamp cylinder 88 is connected to the lower surface of the movable table 74, and a lower end of the clamp cylinder 88 is used to clamp the valve body 10a of the needle valve 10. A pair of openable and closable clamp arms 89 are mounted.

  In this embodiment, as shown in FIG. 8, a shift mechanism 90 for shifting the needle valve 10 clamped by the clamp arm 89 in an oblique direction intersecting with the axial direction is constituted by the slide table 71. ing.

As shown in FIGS. 1 and 9, when the first positioning member 68 is in contact with the first stopper 66 and the arm 63 is in its rotational position, the clamp arm 89 on the loading clamp mechanism 64 side is It is positioned directly above the pallet 47 of the carry-in station S1. Further, the clamp arm 89 on the carry-out clamp mechanism 65 side is positioned directly above the processed needle valve 10 at the carry-out position P3. Then, when the arm 63 is pivoted clockwise about the vertical axis O in FIG. 9 and the second positioning member 69 is brought into contact with the second stopper 67, as shown in FIG. The clamp arm 89 on the unloading clamp mechanism 65 side is positioned directly above the pallet 47 of the unloading station S2 so that the clamp arm 89 on the clamp mechanism 64 side is positioned directly above the clamp mechanism 31 at the loading position P1. I have to.
(Work cutting system operation)
Next, the operation of the workpiece cutting system configured as described above will be described.

  1 and 9, the needle mechanism 10 is not present in the clamp mechanism 31 at the loading position P1 of the index table 25, the unprocessed needle valve 10 is held by the clamp mechanism 31 at the processing position P2, and the unloading position P3. The state in which the processed needle valve 10 is held by the clamp mechanism 31 is shown. At this time, the pallet 47 holding the unprocessed needle valve 10 at the loading station S1 is positioned by the stopper pin 49, and the empty pallet 47 is positioned at the unloading station S2 by the stopper pin 49. Further, the clamp arm 89 in the unclamped state of the carry-in clamp mechanism 64 is held at the retracted position above the carry-in pallet 47, and the clamp arm 89 in the unclamped state of the clamp mechanism 65 in the carry-out from the clamp mechanism 31. It is held at a retracted position separated upward.

  In this state, the rotary tools 14 and 15 of the cutting mechanism unit 11 are moved in a direction approaching each other, and the outer peripheral surfaces of the small-diameter portion 10d and the flange portion 10e of the needle valve 10 are vertically moved in two directions as shown in FIGS. Is cut to form the groove 10f.

Then, while cutting of the needle valve 10 is being performed at the processing position P2, the operation for carrying in the unprocessed workpiece W and the operation for unloading the processed workpiece W are performed by the following first to sixth steps. Done.
(First step)
During the processing of the raw needle valve 10, the lifting cylinder 57 is operated, and the arm 63 is lowered together with the loading clamp mechanism 64 and the unloading clamp mechanism 65 from the position shown in FIG. Then, the unclamped clamp arm 89 on the loading clamp mechanism 64 side is moved to the position of the unprocessed needle valve 10 held on the pallet 47. Further, as indicated by a solid line in FIG. 5A, the clamp arm 89 in the unclamped state on the side of the unloading clamp mechanism 65 is moved to the position of the processed needle valve 10. In this state, both clamping cylinders 88 are actuated simultaneously, and the clamp arm 89 clamps the valve body 10 a of the processed needle valve 10 and the valve body 10 a of the unprocessed needle valve 10. Thereafter, as shown in FIG. 5B, the movable clamp member 38 of the clamp mechanism 31 at the carry-out position P3 is separated from the fixed clamp member 35, and the clamped state of the processed needle valve 10 is released. Furthermore, the clamp arm 89 and the needle valve 10 are shifted in the direction of the arrow in FIG. 5B by operating the slide table 71 of the shift mechanism 90 shown in FIG. Separated from member 39.
(Second step)
Next, the operation of the lift cylinder 57 raises the arm 63 and the like, and the unprocessed needle valve 10 and the processed needle valve 10 are moved to a predetermined upper position as shown in FIG.
(Third step)
By the operation of the turning cylinder 61, the arm 63 and the like are turned in the arrow direction in FIG. For this reason, as shown in FIG. 13, the raw needle valve 10 held by the carry-in clamp mechanism 64 is moved to a predetermined position above the clamp mechanism 31 in the non-clamp state, and is also moved by the carry-out clamp mechanism 65. The processed needle valve 10 that is held is moved to a predetermined position above the unloading pallet 47 in the unloading station S2.
(Fourth process)
The operation of the lifting cylinder 57 lowers the arm 63 and the like, and the unprocessed needle valve 10 on the loading clamp mechanism 64 side is in the unclamped state of the clamp mechanism 31 as shown in FIG. 14 (see FIG. 5C). And the processed needle valve 10 on the side of the unloading clamp mechanism 65 are moved to the pallet 47 of the unloading station S2. Then, the clamping cylinder 88 is operated, the clamped state of the processed needle valve 10 by the clamp arm 89 is released, and the processed needle valve 10 is held by the unloading pallet 47.

On the other hand, the unprocessed workpiece W moved between the fixed clamp member 35 and the movable clamp member 38 of the clamp mechanism 31 is held at a position separated from the position regulating member 39 as shown by a solid line in FIG. It will be in the state. Therefore, in this state, the movable table 74 of the slide table 71 of the shift mechanism 90 is operated, and the clamp arm 89 and the needle valve 10 are shifted in the tilt direction indicated by the arrow. Then, as shown in FIG. 5D, the needle valve 10 is stopped by the position restricting member 39 while sliding with the clamp arm 89. In this state, the clamp cylinder 36 is operated to move the movable clamp member 38 toward the fixed clamp member 35, and the outer peripheral surface of the valve body 10a of the needle valve 10 is clamped by the clamp grooves 35b and 38b. Further, the clamp cylinder 88 is operated, and the clamp arm 89 is unclamped as shown by a two-dot chain line in FIG. 5D, and the carry-in of the needle valve 10 to the clamp mechanism 31 is completed.
(Fifth step)
When the elevating cylinder 57 is operated, the arm 63 and the like are raised as shown in FIG.
(Sixth step)
Next, by the operation of the turning cylinder 61 shown in FIG. 15, the arm 63 and the like are turned in the direction of the arrow, and the first positioning member 68 is brought into contact with the first stopper 66 as shown in FIG. Etc. are stopped at the retracted position.

As shown in FIG. 16, in the sixth step, the actuator 50 is actuated to move the stopper pin 49 to the side retracted position, and the drive mechanism 46 of the work conveying device 41 is actuated to convey the conveyor belt 45. Is operated by one pitch division. Then, the empty loading pallet 47 in the loading station S1 is moved to the unloading station S2, and the unloading pallet 47 holding the processed workpiece W in the unloading station S2 is transported downstream, Another pallet 47 holding W is moved to the loading station S1 and stopped. Prior to the stop, the actuator 50 is operated and the stopper pin 49 is protruded. Accordingly, each pallet 47 is stopped in a positioned state. In this way, the next unprocessed and processed workpiece W is loaded and unloaded.
(Indexing operation)
After completion of the sixth step described above, the index table 25 of the workpiece position switching mechanism 21 is turned, the unprocessed needle valve 10 at the loading position P1 is moved to the processing position P2, and the processed needle valve at the processing position P2 is moved. 10 is moved to the carry-out position P3. Thereafter, the work W is exchanged between the pallet 47 and the index table 25.
(Machining operation)
While the workpiece W replacement operation described above is being performed, the rotary tools 14 and 15 of the cutting mechanism unit 11 are moved toward each other, and the small diameter portion 10d of the needle valve 10 is moved as shown in FIGS. And the outer peripheral surface of the collar part 10e is cut from two directions up and down, and the groove part 10f is formed. (Refer to the timing chart in FIG. 17)
(Effect of embodiment)
According to the workpiece cutting system of the above embodiment, the following effects can be obtained.

  (1) In the above embodiment, the valve body 10a of the needle valve 10 is clamped, and the pair of upper and lower rotary tools 14 and 15 simultaneously process the double groove portion 10f in the small diameter portion 10d and the flange portion 10e of the needle valve 10. Compared with a cutting machine that processes in two steps, the processing efficiency of the groove 10f can be improved, and it can be prevented that the processing position shifts due to re-handling. Accuracy can be improved. Further, since the flange portion 10e (processing portion) of the needle valve 10 is sandwiched from the vertical direction separated by 180 ° by the rotary tools 14 and 15, the needle valve 10 is prevented from being deformed, and the processing accuracy of the groove portion 10f is prevented. Can be improved.

  (2) In the above embodiment, the index table 25 is turned to sequentially switch the clamp mechanism 31 to the carry-in position P1, the machining position P2, and the carry-out position P3. Further, a lifting member 56 that is moved up and down by a lifting cylinder 57 is mounted on the horizontal support plate 53, an arm 63 that is swung by a swiveling cylinder 61 is mounted on the lifting member 56, and a loading clamp mechanism is mounted on the arm 63. 64 and an unloading clamp mechanism 65 were mounted. Further, the carry-in pallet 47 and the carry-out pallet 47 are conveyed to the carry-in station S1 and the carry-out station S2 set on the conveyor belt 45 of the work conveying device 41. Then, as described in the first to sixth steps, the unloaded workpiece W in the loading station S1 is loaded into the index table 25 into the loading position P1, and the processed workpiece is in the index table 25 at the unloading position P3. The carry-out operation of W was performed in synchronization. For this reason, the carrying-in / out operation | movement of the unprocessed workpiece | work W and the processed workpiece W can be performed rapidly, and the work efficiency of the carrying-in / out operation | work of the workpiece | work W can be improved.

  (3) In the above embodiment, the housing recess 30a penetrating in the vertical direction is provided on the outer periphery of the table main body 30, the outer periphery opening of the housing recess 30a is closed by the bracket 34, and the fixed clamp member 35 is removed from the bracket 34. The movable clamp member 38 is detachably attached to a piston rod 37 of a clamp cylinder 36 fixed to the bracket 34. Therefore, when the type of the workpiece W is changed by separating the bracket 34 from the table main body 30, separating the fixed clamp member 35 from the bracket 34, and separating the movable clamp member 38 from the piston rod 37. The fixed clamp member 35 and the movable clamp member 38 of different standards can be easily exchanged.

  (4) In the above embodiment, during the work of cutting the workpiece W at the machining position P2 by the rotary tools 14 and 15, the workpiece carry-in / out device 51 carries in the next unmachined workpiece W and the machined workpiece W. Therefore, the cutting work efficiency of the workpiece W can be improved.

  (5) In the above embodiment, the arm 63, the loading clamp mechanism 64, and the unloading clamp mechanism 65 are moved up and down by one lifting cylinder 57 and swiveled by one swiveling cylinder 61. . For this reason, the number of parts of the work carry-in / out device 51 can be reduced, the manufacturing and assembling work can be easily performed, and the installation space and cost can be reduced.

(6) In the above embodiment, the shift mechanism 90 is provided in the loading clamp mechanism 64, and the needle valve 10 clamped by the clamp arm 89 is shifted in an oblique direction intersecting the axis. For this reason, one end surface of the needle valve 10 can be brought into contact with the position regulating member 39 provided on the index table 25, and the position can be set at an appropriate processing position. Further, since the shift mechanism 90 is provided in the unloading clamp mechanism 65, the needle valve 10 can be raised after the needle valve 10 in contact with the position restricting member 39 is separated from the position restricting member 39. The sliding contact between the regulating member 39 and the needle valve 10 can be prevented, and damage to the position regulating member 39 and the needle valve 10 can be avoided.
(Another embodiment)
In addition, you may change the said embodiment as follows.

A milling blade for cutting the groove 10f may be used instead of the rotary tools 14 and 15 as a rotary tool.
Although not shown, the arm 63 may be divided into two parts, and each of the arms 63 may be independently turned by the turning cylinder 61. In this case, the freedom degree of the installation position of the carrying-in station S1 of the workpiece conveying apparatus 41 and the carrying-out station S2 can be improved.

  Although not shown, a mechanism for adjusting the position of the slide table 71 in the horizontal direction may be provided for the arm 63 so that the position of the clamping cylinder 88 in the horizontal plane can be adjusted.

  A clamp arm 89 that is opened and closed by a clamp cylinder 88 is used as a loading holding mechanism and a loading holding mechanism. Instead, for example, a workpiece holding mechanism that holds a workpiece by an electromagnet or a vacuum suction mechanism is used. May be.

In place of the clamp mechanism 31, for example, an electromagnetic chuck, a vacuum suction mechanism, or another gripping mechanism may be used as a workpiece gripping mechanism.
-You may make it support the workpiece | work W directly on the conveyor belt 45 of each station S1, S2 without providing the holder 48. FIG.

-You may arrange | position separately the workpiece carrying-in mechanism which carries in the unprocessed workpiece | work W in carrying-in station S1, and the workpiece carrying-out mechanism which carries out the processed workpiece from carrying-out station S2.
The shift mechanism 90 may be omitted.

  W: Workpiece, P1: Loading position, P2: Processing position, P3: Loading position, S1: Loading station, S2: Loading station, 14, 15: Rotating tool, 25: Index table, 34, 43 ... Bracket, 39 ... Position Restricting member, 41... Work transfer device, 63... Arm, 90.

Claims (6)

Work gripping mechanisms for gripping the outer peripheral surface of the rod-shaped work are provided at three locations on the index table. As the index table is indexed, each work gripping mechanism is assigned sequentially to the workpiece loading position, machining position, and unloading position. In the state where the outer peripheral surface of the rod-shaped workpiece is gripped by the workpiece gripping mechanism at the processing position of the index table, the outer peripheral surfaces of the pair of disk-shaped rotating tools are opposite to each other at two locations on the outer peripheral surface of the rod-shaped workpiece. A method of machining a rod-shaped workpiece, characterized in that two rod grooves extending along the axial direction of the workpiece are simultaneously cut into the rod-shaped workpiece. Work gripping mechanisms for gripping the outer peripheral surface of the rod-shaped work are provided at three locations on the index table. As the index table is indexed, each work gripping mechanism is assigned sequentially to the workpiece loading position, machining position, and unloading position. is configured to be, the two disc-shaped rotating tool for simultaneously machining a groove of the secondary streaks in two places of the outer peripheral surface of the rod-shaped workpiece through the workpiece placed on the opposite side of each other, the axis of the rotary tool Are parallel to each other, and the axis is perpendicular to the axis of the rod-like workpiece. In claim 2, the work gripping mechanism is provided in a through hole formed in the index table so as to open in the vertical direction so that the rotary tool enters the work from the upper and lower openings of the through hole. A processing device for a bar-shaped workpiece. In Claim 3, The said through-hole is open | released by the outer peripheral surface of an index table, The open part of a through-hole is obstruct | occluded by the bracket, The said through-hole is formed, The one side of the outer peripheral surface of a workpiece | work is formed in the inner surface of the said bracket. A rod-shaped workpiece machining apparatus, wherein a first clamp member for clamping the first clamp member is mounted, and a second clamp member is supported on an inner surface of the through hole so as to face the first clamp member. . 5. The work transfer device according to claim 2, wherein a work transfer device is provided adjacent to the index table, and an arm is disposed between the index table and the work transfer device so as to be pivotable at an intermediate portion thereof. The arm is provided with a holding mechanism for detachably holding the workpiece, and an unprocessed workpiece at the loading station of the workpiece transfer device is loaded into the index table by the detaching operation of the holding mechanism and the pivoting operation of the arm. In addition to delivering to the workpiece gripping mechanism at the position, the unloading operation of delivering the processed workpiece gripped by the workpiece gripping mechanism at the unloading position of the index table to the unloading station of the workpiece transfer device is performed. A machine for processing rod-shaped workpieces. 6. The position restricting member according to claim 5, wherein the arm holding mechanism shifts the work when the work is loaded into the work gripping mechanism at the loading position of the index table, and one end of the work is provided on the index table. A bar-shaped workpiece machining apparatus, comprising a shift mechanism for positioning by contact.

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