JPH09272013A - Twin broach machining method and twin broaching machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously perform rough and finish machining, by continuing to the rough machining, mounting a finish machining broach replaced with a rough machining broach in a pull head, and performing the finish machining. SOLUTION: A broach clamp device 27 is lifted, a rough machining broach 30b is extracted from a pull head 16. A finish machining broach transfer feeder 22 is actuated, to be moved to a position A, the broach clamp device 27 is lowered down, a finish machining broach 30a is set. A hydraulic cylinder is actuated in a direction shortening a cylinder rod, a table 15 is lifted, finish machining of a rough machined workpiece 20 is performed with the finish machining broach 30a by lifting the table 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twin broaching method and a twin broaching machine for performing a roughing process and a finishing process by a single processing machine.

[0002]

2. Description of the Related Art In conventional broaching, roughing and finishing of a workpiece are processed by the same machine, divided into lots, or by using different machines. The machining process is as follows. First, rough machining is performed on all the lots of the workpiece by a broach or broaching machine for roughing, and after finishing the roughing of all lots, the same broach or broaching machine is used for finishing. Finishing is performed for all of the above.

In this case, the workpiece to be machined by the finishing broach or broaching machine is
It must be moved to the work deposit area around the broaching machine. Further, even if the workpieces are moved to a predetermined deposition location, usually, the processing waits until the processing of the first-arriving workpieces is completed, and the processing waits until processing becomes possible.

With regard to finishing, when finishing is performed on the same machine, roughing cannot be transferred to finishing unless all the lots in the lot are finished, and when finishing is done by another machine, some kind of finishing is always required. In many cases, it is impossible to immediately perform machining on a workpiece requiring new finishing after rough machining is completed.

In such a case, when the machining of the workpiece which has been machined up to that point is finished and the waiting workpiece is to be finish machined, it is adjusted to the newly machined workpiece. Tools, jigs, and other materials,
It is necessary to set the workpiece on the finishing broach or broaching machine according to the shape, size, or machining location of the workpiece, and to perform processing preparation work to adjust the broach phase etc. according to the workpiece. is there.

Therefore, in the conventional broaching technique, the workpiece to be broached is stagnant and the rough machining and the finishing machining are required to be changed over, resulting in a large loss of time and a phase loss during the finishing machining. Since it is necessary to make a decision, there has been a problem that a great deal of nerve has to be used for work preparation work such as broach setting.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of these problems of the prior art. The problem to be solved by the present invention is to perform roughing and finishing with one processing machine. It is to provide a twin broaching method and a twin broaching machine capable of being machined.

[0008]

Means for Solving the Problems Claim 1 of the present invention
In the twin broaching method according to the present invention, a work is attached to a table, a broach having the work inserted therein is attached to a pull head fixed to a base, the broach is fixed in position, and the table is moved to perform broaching. In the mobile broaching method, for each of the workpieces, a roughing broach is attached to the pull head to perform roughing, and subsequently, the pulling head is replaced with a roughing broach to attach a finishing broach,
It is characterized by performing finishing.

In the twin broaching method according to the second aspect, a roughing broach is erected on the pull head by penetrating a workpiece attached to the table, and the table is raised in the axial direction of the roughing broach. Roughing, and the position of the roughened workpiece is laterally displaced from the broach standing position, then the table is lowered, the roughing brooch is removed from the pull head, and the roughened workpiece position is set to the original position. After returning to the position, next, a broach for finishing is erected on the pull head by penetrating the rough-worked workpiece, and the table is lifted in the axial direction of the broach for finishing to finish the same. It is characterized in that rough machining and finishing machining are sequentially performed on the workpiece by the same machining machine.

In the twin broaching machine according to a third aspect of the present invention, a pull head for inserting and attaching one end of the broach is fixed to a base, and a table for fixing a work is provided on the main body so that the table can be moved up and down. In a table lift type broaching machine for raising and broaching a table fixing a work piece, the pulling head is arranged on the upper part of the main body, and the broaches for roughing and finishing are individually transferred. And two self-propelled broach transfer means to be inserted into the base, and broaches formed on the side of the base on which the table is arranged so that broaches for roughing and finishing can be erected. It is characterized by having a pull head for preparation.

In the twin broaching machine according to a fourth aspect, a jig for mounting a workpiece is arranged on the table, and the jig detects the phase of each broach and adjusts it to a phase suitable for machining. It is characterized in that a phase determining means is provided.

In a twin broaching machine according to a fifth aspect, a jig for mounting a workpiece is arranged on the table, and the jig detects the phase of each broach and adjusts it to a phase suitable for machining. It is characterized in that a phase determining means is provided.

In a twin broaching machine according to a sixth aspect, the pulling head for broach preparation is movably formed from a side end portion of the base to a position where the broach transfer means can deliver the broach, and a side surface of the main body is provided. It is characterized in that a self-propelled broach preparation transfer means for moving the broach to a position where the broach can be inserted into the broach preparation pull head waiting at a side end portion of the base is provided at an upper portion.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the following embodiments of the present invention, the case of a vertical twin broaching machine will be described.
However, the present invention is not limited unless otherwise specified.

[Structure] FIG. 1 is a front view showing the structure of a twin broaching machine, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. A rectangular column type main body 12 is erected at the center of a base 11 of the twin broaching machine 10, and a hydraulic cylinder 13 for broaching with a cylinder rod 13a facing downward is provided above the main body 12.

The hydraulic cylinder 13 includes a cylinder rod 1
A table 15 is attached to the front end (lower end) of 3a, and a work fixing device 14 for centering and fixing the work 20 is mounted and fixed on the table 15 as a jig for attaching the work. Then, by expanding and contracting the cylinder rod 13a of the hydraulic cylinder 13 to move the table 15 up and down, the workpiece 20 fixed to the workpiece fixing device 14 is fixed.
Move up and down. A pull head 16 for fixing the broach 30 is erected just below the center of the table 15.

The work fixing device 14 is provided with a carriage 17 which is movable back and forth and left and right, and a rough guide 18 for roughly positioning the work 20 and a center of the work 20 at a central portion of an upper surface of the carriage 17. A clamping / fastening device 19 for carrying out and fixing is provided so that the fixed position of the attached work 20 is roughly suppressed, and then the workpiece 20 can be clamped and fastened for accurate centering.

In this workpiece fixing device 14, when the carriage 17 is in the neutral position, it is set as a standard position (hereinafter referred to as a processing position) a for positioning for broaching, and the processing position a is viewed from the front. The position where the carriage 17 is shifted to the left as viewed is the return operation position b for positioning the workpiece 20 when returning the table 15 to the original position after broaching.

The workpiece fixing device 14 mounted and fixed on the table 15 has the hole for the workpiece fixing device 14 located right above the pull head 16 when it is in the processing position a or the returning operation position b. A hole (not shown) for penetrating the broach is formed at each position so as not to interfere even when the broach 30 is upright.

On the front upper part of the main body 12, a broach transfer device 21 for roughing is provided as a broach transfer means at a position concentric with the work 20 at the processing position a of the work fixing device 14.
Alternatively, a finishing broach transfer device 22 is provided.
When the finishing broach transfer device 22 is located at a position A concentric with the processing position a, the roughing broach transfer device 21 moves to the position B, which is closer to the right side when viewed from the front of FIG. Further, at the position A, the roughing broach transfer device 2
Broach transfer device 2 for finishing when 1 is located
2 moves to a position C, which is closer to the left side when viewed from the front of FIG. 1, and waits. In addition to this, the standby position B is provided with a space required for the roughing broach transfer device 21 to perform the broach exchange operation.

In each of the broach transfer devices 21 and 22 for roughing and finishing, linear motion bearings (not shown) are provided on rails 23, 23 horizontally arranged at the upper end of the front side wall of the main body 12. It is mounted so that it can be freely moved along the rails 23, 23 between the processing position A and each standby position B or C.

Each of the broach transfer devices 21, 22 has the same shape, and has a moving body 24 for moving horizontally along the rails 23, 23, and this moving body 24 for the rails 23, 2.
Drive device 2 consisting of a hydraulic cylinder that moves along 3
5 and an elevating device 26 including a hydraulic cylinder in which a cylinder rod for vertically moving a broach held in the center of the lower end of the moving body 24 is directed downward, and a broach holding device provided at the lower end of the cylinder rod provided in the elevating device 26. 27 is provided.

The broach gripping device 27 incorporates a proximity switch (not shown) inside the gripping portion 27a provided at the central portion thereof so that the gripping of the upper end of the broach can be detected. Further, hydraulic cylinders 27b, 27b are provided on both sides of the grip portion 27a so that the upper end portion of the broach is clamped so that it can be gripped. Guide rods 28, 28 are provided on both sides of the lifting device 26 so as to prevent malfunctions due to the tilting or bending of the lifting device 26.

Below the standby position B, on the side of the base 11 is provided a lower broach transfer device 32 in which a pull head 31 for broach preparation that is movable in the horizontal direction is erected. In this lower broach transfer device 32, two guide rods 33, 33 for moving the broach preparation pull head 31 in the left-right direction and the horizontal direction with respect to the front surface of the main body are arranged in parallel, and are used for rough processing. Position where the broach transfer device 21 stands by for broach exchange (hereinafter referred to as broach exchange position c)
And a position (hereinafter referred to as a broach preparation position d) where a used broach inserted in the broach preparation pull head 31 is taken out and bent or a new broach to be delivered to the roughing broach transfer device 21 is inserted. Between the broach preparation pull head 31 and the guide rod 33,
A screw gear 34 to be moved along 33 is arranged in parallel with the guide rods 33, 33. The screw gear 34 is connected to a motor 36 via a chain 35, and the screw gear 34 is rotated by driving the motor to prepare for broaching. The pull head 31 is moved between the broach exchange position c and the broach preparation position d.

At the upper end of the side wall surface of the main body 12, the rails 41, 41 arranged in the horizontal direction are mounted via linear motion bearings (not shown), and the broach preparation pull head 31 at the broach preparation position d and the side surface of the main body. A broach preparation transfer device 42 that moves between the broach 30 and the pull heads 51 for standing upright on the rear base 11 and moves the broach 30 to each pull head 31, 51 is provided.

In this broach preparation transfer device 42, a movable body 4 which is moved horizontally along the rails 41, 41.
3, a drive unit 44 composed of a hydraulic cylinder for moving the moving body 43 along the rails 41, 41, and an elevating device 45 composed of a hydraulic cylinder provided at the lower end of the moving body 43 to move the brooch up and down. Equipped with a lifting device 45
Bracket attached to the lower end of the cylinder rod of
Attach the broach gripping device 47 to the. Similar to the broach gripping device 27, this broach gripping device 47 is provided with a gripping part 47a at the center and hydraulic cylinders 47 on both sides thereof.
b and 47b are provided so that the upper end of the brooch can be pinched or unpinched, and a proximity switch (not shown) can be incorporated inside the grip 47a to detect that the upper end of the brooch is gripped. Guide rods 48, 48 are provided side by side on both sides of the lifting device 45.
Make sure that the vertical movement is not hindered by falling or bending.

The front surface and both side surfaces of the main body of the broaching machine 10 are covered with a cover 52 for preventing cutting oil, cutting chips and the like from scattering around the processing position. Broach transfer devices 21, 22 which are devices related to broach transfer, lower broach transfer device 32, broach preparation transfer device 42
In addition to the above, a detector for checking the presence or absence of the work piece 20 or the broach 30 is provided at each appropriate place.

For example, above the pull head 16, there is provided a broach upper end detection device 53 which comes into contact with the upper end of the broach 30 that rises during processing and detects movement of the broach.
The broach upper end detection device 53 is supported on the cover 52 side, and is a rotating device 53a provided in the central portion as shown in FIG.
The front end portion 53b is formed so as to be rotatable about a vertical axis (front-back direction with respect to the front surface) by attaching the broach 30,
At the time of removal, it is rotated to the front side so as not to interfere with the work, and at the time of processing, it is rotated to the broach side so that the tip can be positioned right above the broach 30.

When the broach upper end detection device 53 is set to a state in which the broach can be detected, if the broach 30 rises and the upper end hits as the table rises during processing, the broach 30 causes a chucking error and pull head 1 is pulled.
When the brooch 30 is lifted up together with the table 15 after being disengaged from No. 6, and when the broach 30 is broken up and moved up along with the table 15 is detected as the broach upper end contact, the machining operation is stopped as "abnormal cutting". In this way, when the processing operation is stopped for some reason during processing, the upper end of the broach 30 is moved by the broach transfer devices 21, 22.
It is possible to prevent accidents such as hitting and damaging it,
The broach transfer devices 21, 22 can be protected.

Further, the carriage 17 placed on the table 15
Limit switches 54, 55 are provided that contact the side end surface of (the dog) and check the descending end (0 mm from the lower end) and the ascending end (1550 mm from the lower end). In addition, 50 mm from the bottom and
Limit switches 56 and 57 are also provided at the position of 1050 mm so that abnormalities in the detection of the retrending head, backward abnormality of the broach detector, etc. can be detected from the operation timing.

Further, a phase detecting / correcting device 61 for detecting the phase of the brooch and correcting it to a working phase is provided at the tip of the carriage 17 on the return operation position b side (left side when viewed from the front) as a phase determining means. . The phase detection / correction device 61 includes a contact pressing piece 62, two guide rods 63 and 63 that support the contact pressing piece 62 so that the contact pressing piece 62 can move in parallel, and a bracket that movably supports the guide rods 63 and 63. 64 and an operating device 65 which is attached to the bracket 64 and which is a hydraulic cylinder that moves the contact pressing piece 62 so as to move back and forth.

The hydraulic cylinder 13, the work fixing device 14, the roughing broach transfer device 21, the finishing broach transfer device 22, the lower broach transfer device 32, the broach preparation transfer device 42, or the phase detection / correction device 61. In order to operate the above, etc., a control device consisting of a microcomputer is incorporated into a control panel 70 arranged on the front side of the lower broach transfer device installation location of the main body 12 and automatically controlled.

[Broach Attachment] In the embodiment constructed as described above, in order to set the broach on the broaching machine 10, first, the lower end of the finishing broach 30a is inserted into the pull head 51 to stand upright. Then, the drive device 44 is operated in the backward direction to move the broach preparation transfer device 42.
Is moved right above the brooch stand. Subsequently, the cylinder rod of the lifting device 45 is extended and the cylinder rods of the hydraulic cylinders 47b and 47b of the broach gripping device 47 are shortened to open the gripping portion 47a, and the gripping portion 4 is opened.
When the upper end portion of the finishing broach 30a is inserted into 7a and the proximity switch incorporated in the gripping portion detects the insertion, the cylinder rods of the hydraulic cylinders 47b and 47b are extended to close the gripping portion 47a, and the finishing brooch. The upper end of 30a is gripped by holding it. After the finishing broach 30a can be gripped by the broach gripping device 47, the elevating device 45 is operated in the opposite direction to shorten the cylinder rod.
Lift a.

After the lower end of the broach is pulled out from the pull head 51, the drive device 44 is operated in the forward direction to move the broach preparation transfer device 42 to the lower broach transfer device 32 side for finishing work just above the pull head 31. The brooch 30a is moved. After being positioned right above the pull head 31, the elevating device 45 is operated in the descending direction to lower the broach gripping device 47, and the lower end of the finishing broach 30a is inserted into the pull head 31 to stand upright.

The grip portion 4 of the broach grip device 47
7a is opened to release the brooch grip, the lifting device 45 is operated to the up side to lift the broach grip device 47, and the drive device 44 is operated to the rear direction to move the broach preparation transfer device 42 to the pull head 51 installation side. Move to. After the transfer device 42 for broach preparation is moved right above the pull head 51, the roughing broach 30b, which is erected on the pull head 51 in advance, is transferred to the broach preparation pull head 31 in the same manner.

Finishing broach 30 standing on the broach preparation pull head 31 of the lower broach transfer device 32.
The motor a operates the motor 36 to transfer it to the broach exchange position c. When the broach preparation pull head 31 reaches the broach exchange position c, the roughing broach transfer device 21 that has been on standby is activated, and the elevating device 26 is operated in the descending direction to lower the broach gripping device 27 and the broach gripping device. Hydraulic cylinders 27b, 27b incorporated in the 27
To open the grip 27a, insert the upper end of the broach 30a for finishing into the grip 27a, and close the grip 27a after the proximity switch incorporated in the grip detects the insertion of the upper end. Hold it by holding it. After the finishing broach 30a is gripped by the broach gripping device 27, the elevating device 26 is operated in the ascending direction to shorten the cylinder rod and lift the finishing broach 30a.

The roughing broach transfer device 21 pulls out the lower end portion of the finishing broach 30a from the pull head 31 and then activates the drive device 25 in the B → A direction to move the moving body 24 to the position A. The finishing broach 30 a hung by the processing broach transfer device 21 is positioned right above the pull head 16. When it is located right above the pull head 16, the elevating device 26 is operated in the descending direction to lower the broach gripping device 27, and the lower end of the hanging finishing broach 30a is inserted into the pull head 16 to grip the gripping part 27a. Open and release the top end of the brooch. Then, the elevating device 26 is operated in the ascending direction to raise the broach holding device 27, and the drive device 25 is moved from A to B.
The moving body 24 is moved to the position B by starting in the direction.

Subsequently, the driving device 25 of the finishing broach transfer device 22 is activated in the C → A direction to move the moving body 2.
4 is moved to the position A, the elevating device 26 is operated downward to lower the broach gripping device 27, and both hydraulic cylinders 27a, 27a are operated to open the gripping part 27a, which is erected on the pull head 16. It is lowered to the upper end portion of the finishing broach 30a, the upper end portion of the finishing broach 30a is inserted into the grip portion 27a, and both hydraulic cylinders 27a and 27a are operated in the opposite direction to grasp the grip portion 27a.
a is closed and the inserted upper end portion is clamped, and then the elevating device 26 is operated upward to raise the broach gripping device 27 and lift the finishing broach 30a. The driving device 25 is activated in the A → C direction to move the moving body 24 to the position C.
Then, the finishing broach 30a is held in a suspended state.

The roughing broach transfer device 21, which has moved to the position B and is on standby, is activated, the gripping device 27 is lowered, and the upper end of the roughing brooch 30b transferred to the broach preparation pull head 31 is moved. The workpiece is gripped and lifted, and the roughing broach 30b is conveyed to the position A. At this time, on the other hand, after confirming that the carriage 17 of the workpiece fixing device 14 is in the neutral position, the workpiece 20 is placed, the rough guide 18 roughly positions the workpiece 20, and then the clamping device 19 clamps it. Wear it to bring out the core and fix the work piece 20 so that it does not move.

When the workpiece 20 can be set on the workpiece fixing device 14 and the roughing broach 30b is moved to the position A, the lifting device 27 of the roughing broach transfer device 21 is operated downward to hold the roughing work. The broach 30b for processing is lowered, a lower hole (not shown) formed for broaching the workpiece 20 is passed through, and the lower end of the broach is inserted into the pull head 16. When the roughing broach 30b is inserted into the pull head 16, the hydraulic cylinder 2 of the gripping device 27 is inserted.
7a and 27a are operated to release the grip, and the lifting device 27
Is operated in the upward direction to raise the gripping device 27 and make it stand by at a predetermined position.

[Roughing] After the workpiece 20 and the roughing broach 30b are prepared, the broach upper end detection device 53
The tip end of the is rotated to the position immediately above the broach, which is the detection position, so that it can be detected. Further, the phase detection / correction device 61 is operated to confirm the phase of the roughing broach 30b.

After that, the hydraulic cylinder 13 is operated in the machining direction to raise the table 15. Even if the table 15 rises and exceeds the position of the limit switch 56, if the broach upper end detection device 53 does not hit the broach upper end, no broach mounting error is detected, and the roughing broach 30b is normally mounted on the pull head 16. Assuming that the broaching is being performed, the rotating device 53a is operated to rotate the pointed portion 53b to the front side and retract it so as not to interfere with the table 15.

Since the roughing broach 30b is fixed to the pull head 16 provided on the base 11 and stands upright, the workpiece 2 fixed to the workpiece fixing device 14 is fixed.
Broach 30b for roughing, withdrawing relative to 0
A predetermined place is cut according to the shape of the cutting tooth.

After the rough machining is completed, when the table 15 reaches the vicinity of the uppermost portion, the position of the limit switch 57 is exceeded, and the upper end of the rough machining broach 30b comes out of the workpiece 20 and the workpiece fixing device 14. A signal from the limit switch 57 slows down the operating speed of the hydraulic cylinder 13 to stop the lifting of the table 15 at the position where the limit switch 55 is arranged. After the table is stopped, the carriage 17 is moved to the return operation position b, the hydraulic cylinder 13 is operated in the return direction, and the table 15 is lowered to the original position detected by the limit switch 54.

[Replacement of Broach] When the table 15 is returned to its original position, the broach 30 for roughing, which has been waiting above,
The broach gripping device 27 of b is lowered to grip the upper end of the roughing broach 30b. After gripping, the broach gripping device 27 is raised to pull out the roughing broach 30b from the pull head 16. Then, the drive device 25 is operated to move in the A → B direction, return to the position B, and stand by.

On the other hand, the carriage 17 of the workpiece fixing device 14 is moved from the returning operation position b to the machining position a and the workpiece 20 is set at a position where machining is possible. And position C
The broach transfer device 22 for finishing, which has been waiting at, is moved to the position A, the broach gripping device 27 is lowered, and the broach 30a for finishing is pierced through the rough-machined hole of the workpiece 20. The lower end is inserted into the pull head 16 and the finishing brooch 30a is set.

At this time, the phase detection / correction device 61 is operated, the operating device 65 is extended, and the contact pressing piece 62 is pressed against the finishing broach 30a, so that the roughing broach 3 is pressed.
It is confirmed that the phase is the same as the phase of the broach confirmed at the time of setting 0b, and a slight phase shift generated in the finishing broach 30a is corrected.

[Finishing] After the operation device 65 of the phase detection / correction device 61 is shortened to return the contact pressing piece 62 to the original position, the hydraulic cylinder 13 is moved to the cylinder rod 13a.
Is operated in the direction of shortening, the table 15 is lifted, and the workpiece 2 rough-processed by the finishing broach 30a.
After finishing processing of 0, the carriage 17 is moved to the returning operation position b after finishing processing, and thereafter the hydraulic cylinder 13 is operated in the direction in which the cylinder rod 13a extends to lower the table 15 and return it to the original position.

Broach 30a for finishing the workpiece 20
The broach top end detection device 53 detects the broach top end, and the limit switches 54, 55, 56,
The table position detection by 57, the extension / shortening of the hydraulic cylinder 13 depending on the table position, the rotation operation of the broach upper end detection device 53, the movement of the carriage 17, and the like are controlled in the same manner as the rough machining.

When the finishing process is completed, the finishing broach transfer device 22 which has been waiting above is operated, the broach holding device 27 is lowered, and the holding portion 27a is opened and closed, so that the upper end portion of the finishing broach 30a is opened. To hold
After that, the broach gripping device 27 is lifted to remove the finishing broach 30a from the pull head 16 and lift it. Then, the broach transfer device 22 for finishing is set to A
→ Move in the C direction and wait at position C.

[Workpiece exchange] After that, the workpiece fixing device 1
The carriage 17 of No. 4 is returned to the processing position a, and the workpiece 20 that has been finished is removed, and the workpiece 20 in the same lot is removed.
Is attached, and the workpiece 20 attached is repeated from roughing to finishing using the same roughing broach 30b and finishing broach 30a. Thus
The same broaching process is performed for all the workpieces 20 in the same lot, and the process shifts to the processing of the workpieces 20 in other lots.

[Lot Exchange] When the workpieces 20 of other lots require different broaching, the roughing broach 30b and the finishing broach 30a, which are already attached, are removed and a new one is added. The broach 30b for roughing and the broach 30a for finishing which are suitable for the workpiece 20 are exchanged.

[Brooch exchange] To replace the broaches, the roughing broaches 30b are sequentially inserted into the broach preparation pull head 31 and delivered to the lower broach transfer device 32, and the broach preparation pull head 31 is moved to the right end when viewed from the front. The broach preparatory transfer device 42 so that it can be pulled out, and the broach preparatory transfer device 42 is operated to cause the gripping part 47a of the broach gripping device 47 to grip the upper end of the roughing broach 30b and lift it up to the position D. The broach 30b for roughing is inserted into the pull head 51 to stand upright. The roughing brooch 30b provided upright on the pull head 51 is manually removed.

When the roughing broach 30b is inserted into the broach preparation pull head 31, the finishing broach 30a is inserted into the pull head 16, and the roughing broach transfer device 21 is installed upright on the pull head 16. The processing brooch 30a is grasped and lifted, and moved to the broach preparation pull head 31 side. When the roughing broach 30b is removed from the broach preparation pull head 31 and returned to the broach exchange position c, the roughing broach transfer device 21 inserts the finishing broach 30a into the broach preparation pull head 31 and stands upright. Let After that, similarly to the roughing broach 30b, the finishing broach 30a is delivered to the broach preparation transfer device 42, moved to the position D and erected on the pull head 51, and manually removed from the pull head 51. Each broach 30a processed from the broaching machine 10,
30b is removed, and a broach 30a for finishing and a broach 30b for roughing which are compatible with the new workpiece 20 are provided.
Install the workpieces in a new lot in the order described above.
To prepare for processing.

[Effect] As described above, the finishing broach 30a and the roughing broach 30b are attached in advance and made to stand by, and the workpiece 20 attached to the operating table 15 side is made to stand by. Since the broach 30b for processing and the broach 30a for finishing can be sequentially broached for finishing, workability is good, time required for preparatory work and processing can be shortened, mass productivity is improved, and production costs are significantly increased. Can be reduced to

The table lift type broaching machine 10
By providing both the broach transfer devices 21 and 22 for roughing and finishing, it is possible to suppress the installation area to a small area without enlarging it like a horizontal broaching machine. There is no need to dig a deep hole below the device as in the broach pull-out type, the device structure can be simplified and downsized, and the device can be manufactured at low cost and installed easily.

Since the self-propelled broach preparation transfer device 42 is provided on the side surface of the main body, preparatory work for attaching, detaching, or replacing the broaches 30 (30a, 30b) can be performed regardless of broach processing. Therefore, work efficiency and operation efficiency are improved, waiting time can be shortened, and productivity can be improved.

By providing the broach upper end detection device 53, when a broach chuck error, a broach breakage, or the like occurs, it is possible that the broach 30 is lifted together with the table 15 and an unexpected situation occurs. It is possible to detect the damage, prevent damage to the broach transfer devices 21 and 22, and improve safety.

Since the work fixing device 14 is provided with the phase detecting / correcting device 61 for detecting and correcting the phase of the broach, the phase of the finishing broach 30a is in the same phase as the rough machining when finishing machining the same workpiece. Can be easily adjusted, preparatory work for finish machining can be performed in a short time, work efficiency can be improved, and total machining time can be significantly shortened.

To prepare a broach transfer device 21 for roughing and a broach transfer device 22 for finishing, which respectively transfer the broaches for roughing and finishing, to prepare a broach in addition to the pull head 16 for processing. By providing the pull head 31 for preparing the broach, the broaches for finishing and roughing are provided with two pull heads 31,
16 are erected in order, and a broach transfer device 21 for roughing is provided.
And the finishing broach transfer device 22 in order, and the broach can be hung by the roughing broach transfer device 21 and the finishing broach transfer device 22 so as to be in a standby state, which is the minimum material. Therefore, each broach for roughing and finishing can be effectively prepared.
Therefore, the broach preparation work is simplified and the roughing and finishing of the same workpiece can be efficiently advanced, and the broach can be easily installed, replaced, and machined, and the work efficiency can be improved.

[Other Embodiment] This embodiment has been specifically described for better understanding of the present invention, and does not limit another embodiment unless otherwise specified. Therefore, it can be changed without changing the gist of the invention. For example, the lower broach transfer device 32 is a combination of a straight traveling type device and an upright pull head, and the broach preparation transfer device 42 is a roughing broach transfer device 21.
Alternatively, the broach transfer device 22 is configured in the same manner as the finishing broach transfer device 22, but the lower broach transfer device 32 is formed so that the broach preparation pull head 31 can be inverted and stood upright, and the broach preparation transfer device 42 is formed by the broach preparation pull head 31. You may comprise as a horizontal type broach insertion device which inserts a brooch when it has fallen over.

[0062]

As described above, in the twin broaching method according to the first aspect of the present invention, it is possible to finish each workpiece by performing roughing and finishing for each workpiece attached to the table. In addition, the workability is good, the processing time can be greatly shortened, the mass productivity can be improved, and the production cost can be greatly reduced. In addition, since each work piece is finished, there is no stagnation of the work piece in the finishing process, the stock amount for the next process is small, and the work place can be reduced, facilitating the process control. You can

Further, in the twin broaching method according to the second aspect, rough machining and finishing machining can be sequentially performed on the same workpiece by the same machine, and all the workpieces of the same lot can be processed. Since the broaching process can be finished for each workpiece, each broach can be easily attached, the time required for preparation and processing can be shortened, and the productivity can be improved.

Further, in the twin broaching machine according to the third aspect, since it is a table lift type, even if two self-propelled broach transfer means are provided, the apparatus configuration can be simplified and downsized, and the installation area is small. , The broaches for roughing and finishing can be set in each broach transfer means through the broach preparation pull head, and the two broaches can be efficiently prepared.
A device that is easy to handle can be realized. Furthermore, each broach for finishing and roughing can be sequentially attached to the two pull heads for machining and broach preparation, and can be transferred to the roughing broach transfer means and the finishing broach transfer means in order. Each broach can be hung and made to stand by by the roughing broach transfer means and the finishing broach transfer means, and the roughing and finishing broaches can be efficiently prepared with the minimum material. .

In the twin broaching machine according to the fourth aspect, the phasing means of the finishing broach is used for the finishing broach which is inserted into the workpiece attached to the predetermined position by using the jig. The phase can be modified to be the same as that of the roughing broach, and the broach can be set on the broach transfer means more easily than before, making preparation work quicker and easier, and improving work efficiency. Can be improved.

Further, in the twin broaching machine according to the fifth aspect, the broaching upper end detecting means can be used to check the broach's chucking error, breakage, etc. in advance when the table is raised, so that an unexpected situation due to cutting abnormality can be avoided during machining. it can.

Further, in the twin broaching machine according to the sixth aspect, the broach can be prepared on the side surface side of the main body independently from the processing by attaching the broach to the broach preparation pull head by the broach preparation transfer means. Work efficiency and operation efficiency can be improved, and productivity can be improved.

[Brief description of drawings]

FIG. 1 is a front explanatory view showing an embodiment of a broaching machine according to the present invention.

FIG. 2 is a side view showing an embodiment of the broaching machine according to the present invention.

FIG. 3 is an explanatory plan view showing an embodiment of a broaching machine according to the present invention.

[Explanation of symbols]

10 Broaching Machine 11 Base 12 Main Body 13 Hydraulic Cylinder 14 Work Fixing Device (Jig) 15 Table 16 Pull Head 17 Carriage (Jig) 18 Rough Guide (Jig) 19 Clamping Fastening Device (Jig) 20 Work 21 Roughing broach transfer device (roughing broach transfer means) 22 Finishing broach transfer device (finishing broach transfer means) 23 Rail 24 Moving body 25 Drive device 26 Elevating device 27 Broach gripping device 30 Brooch 30a For finishing process Broach 30b Roughing broach 31 Brooch preparation pull head 32 Lower broach transfer device 34 Screw gear 35 Chain 36 Motor 41 Rail 42 Broach preparation transfer device (broach preparation transfer means) 43 Moving body 44 Drive device 45 Elevating device 47 Broach gripping Device 5 2 cover 53 brooch upper end detection device (brooch upper end detection means) 54, 55, 56, 57 limit switch 61 phase detection correction device (phase determining means) 62 contact pressing piece 65 operating device 70 control panel

Claims (6)

[Claims] 1. A table-moving broach that mounts a work on a table, mounts a broach through which the work is inserted to a pull head fixed to a base, fixes the position of the broach, and moves the table to perform broaching. In the processing method, for each of the workpieces, a roughing broach is attached to the pull head to perform roughing, and subsequently, the pulling head is replaced with a roughing broach to attach a finishing broach, and finishing is performed. Twin broaching method characterized by. 2. A rough machining process in which a roughing broach is erected on the pull head so as to pass through a workpiece attached to the table, and the table is lifted in the axial direction of the roughing broach to perform rough machining. After shifting the position of the object laterally from the broach standing position, the table is lowered, the roughing broach is removed from the pull head, the position of the roughened workpiece is returned to the original position, and then, Finishing broaches are erected on the pull head through the rough-worked workpieces, and the table is lifted in the axial direction of the finishing broaches to finish the same workpieces. The twin broaching method according to claim 1, wherein the roughing and the finishing are sequentially performed by. 3. A table in which a pull head, into which one end of a broach is inserted and fixed, is fixed to a base, a table for fixing a work is provided on the main body so that the table can be moved up and down, and the work through which the broach is inserted is fixed. In a table lift type broaching machine for raising and broaching, two self-propelled type which are arranged on the upper part of the main body, and separately transfer broaches for roughing and finishing and insert them into the pull head. Broach transfer means, and a broach preparation pull head formed on the side of the base on which the table is arranged so that broaches for roughing and finishing can be set upright. Twin broaching machine featuring. 4. A jig for mounting a work piece is arranged on the table, and the jig is provided with phase determining means for detecting a phase of each broach and adjusting the phase to a phase suitable for machining. The twin broaching machine according to claim 3, which is characterized in that. 5. The twin broaching machine according to claim 3 or 4, further comprising broach upper end detecting means provided on the main body side for detecting the presence or absence of an upper end of the broach. 6. The broach preparation pull head is movably formed from a side end of the base to a position where the broach can be delivered by the broach transfer means, and a side end of the base is provided on an upper portion of a side surface of the main body. 4. The twin broaching machine according to claim 3, further comprising a self-propelled broaching preparation transferring means for moving the broach to a position where the broach can be inserted in the broaching pull head that stands by at a section.