JP3763677B2 - Progressive press die insertion / removal type tapping device and progressive press die insertion / removal type tapping method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a progressive press die insertion / removal type tapping device and a progressive press that perform continuous and automatic tapping simultaneously with press processing by inserting it into a fixed position of a lower press die attached to a press molding machine. The present invention relates to a mold insertion / removal tapping method .
[0002]
[Prior art]
Conventionally, in the tapping method of tapped press products of small, after the base material was progressive press working by a small press molding machine, using a tapping dedicated machine, it is doing the tapping automatically.
[0003]
[Problems to be solved by the invention]
However, in such a conventional tapping method of a tapped press product, the tapping dedicated machine is limited to only one kind of tapping processing and lacks versatility. For this reason, in tapping processing of a small amount and a variety of products, it is necessary to tap all of these varieties one by one with a human hand using a tapping machine , and much manpower and time are consumed.
[0004]
The present invention has been made to solve such conventional problems, the size of the press, the forward feed press die size, and without limitation to the production quantity, also of instrumentation置内gear can correspond to the pitch of a number of screw taps by changing the gear ratio, can be shared in a mold of various kinds, stamping progressive press die in insertion and removal formula can perform tapping with continuous automatic in the tapping It is an object of the present invention to provide an apparatus and a progressive press die insertion / removal tapping method.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a progressive press die insertion / removal type tapping apparatus according to the present invention includes a drive shaft that is rotatably supported by a main body, and each of the drive shafts fixed to the upper and lower portions of the drive shaft. A drive-side gear, upper and lower driven gears meshed with these drive-side gears, a ball female screw body that is attached to the lower portion of the main body and meshes with a ball screw, and the ball screw Fixed to the upper end and prevented from rotating with respect to the lower gear on the driven side, and supported by a spring in the lower part of the processing shaft that is penetrated so as to be movable in the axial direction and in the hollow portion formed in the lower part of the processing shaft. And a plunger partially accommodated so as to be movable and rotatable in the axial direction, and fixed to the protruding end of the plunger protruding from the hollow portion, and prevented from rotating with respect to the upper gear on the driven side. Together, characterized in that it comprises a machining axis top screw tap attachment which is axially movably through the.
[0006]
Further, in the progressive press mold insertion / removal type tapping device according to the present invention, the upper drive side gear and the upper driven gear meshing with the upper drive side gear are rotated at the rotational speed of the upper part of the machining shaft by the gear ratio. The lower drive-side gear and the lower driven-side gear meshing with the lower drive-side gear set the axial movement amount for one rotation of the upper part of the machining shaft according to the gear ratio. And
[0007]
Further, the progressive press die insertion / removal type tapping device according to the present invention absorbs the axial load applied to the screw tap by contraction of the spring via the processing shaft upper part and the plunger, It is characterized by preventing breakage of the screw tap.
[0008]
Further, in the progressive press mold insertion / removal type tapping method according to the present invention, the progressive press mold insertion / removal type tapping device according to claim 1 is formed at a fixed position of the lower mold of the progressive press mold. Inserted into the tapping device insertion part, connected the drive shaft and drive source in the progressive press mold insertion / removal type tapping device, and positively rotated the screw tap by the drive source to an appropriate amount during one stroke of the press molding machine. Further, tapping is performed at the same time as progressive press working by rotating in reverse.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 is an exploded perspective view showing a progressive press mold containing a tapping device of the present invention, FIG. 2 is a front view of the tapping device, FIG. 3 is a plan view of the tapping device, and FIG. 4 is a tapping device. FIG. 5 is an explanatory view showing a gear arrangement in the tapping device, and FIG. 6 is an exploded perspective view showing a processing shaft structure in the tapping device.
[0010]
As shown in FIG. 1, the progressive press die 18 is composed of an upper die and a lower die, and a tapping device as shown in FIG. 2 is provided in a notch (tapping device insertion portion) provided at the center of the lower die. Is removably mounted. The tapping device includes four block-shaped main bodies 1a to 1d, a drive shaft 6 supported rotatably with respect to the main bodies 1a to 1d, and the drive shaft 6 in the internal space of the main bodies 1a and 1c . Each of the drive-side gears 2 and 4 fixed to the upper and lower portions, and each of the drive-side gears 2 and 4 is engaged with each of the upper and lower driven gears.
[0011]
Further, a ball female screw body 10 that meshes with the ball screw 7d is attached to the lower portion of the main body 1d. At the upper end of the ball screw 7d, a machining shaft lower portion 7b that is fixed to the lower gear 3 on the driven side and is penetrated so as to be movable in the axial direction is fixed.
[0012]
A spring 15 is accommodated in a hollow portion formed in the processing shaft lower portion 7b, and a part of the plunger 7c is supported through the spring 15 so as to be axially movable and rotatable by a bearing 14.
The upper end of the plunger 7c protruding upward from the hollow portion is prevented from rotating with respect to the upper gear 5 on the driven side, and is attached to the upper portion of the processing shaft for mounting the screw tap 9 that is penetrated so as to be axially movable. 7a is fixed.
[0013]
A hollow enamel screw 13 is screwed into an upper opening end of the hollow portion formed in the machining shaft lower portion 7b, and the plunger 7c is slidably supported in a center hole of the hollow enamel screw 13 so as to pass therethrough. Yes. The processing shaft lower portion 7b is rotatably supported via each one bearing 14 in the internal space of the main bodies 1b and 1d. The processing shaft upper portion 7a is rotatably supported via each one bearing 14 in the main bodies 1a and 1b.
[0014]
The base of the screw tap 9 is inserted into the tip (upper opening) of the processing shaft upper portion 7 a and is fastened and fixed by operating the collet 8. The drive shaft 6 is also rotatably supported by each one bearing 14 in the main bodies a1 to 1d.
[0015]
The lower gear 2 on the drive side is configured to transmit the rotation of the drive shaft 6 to the lower gear 3 on the driven side. For this reason, the gear 3 rotates, and the ball screw 7d is rotated via the processing shaft lower portion 7b that is prevented from rotating around the gear 3. Since the ball screw 7d is meshed with the ball female screw body 10, the machining shaft lower portion 7b can be moved up and down according to the rotation direction in an amount corresponding to the meshing pitch.
[0016]
The main bodies 1a to 1d are composed of four blocks as described above, and the gears 2 and 3 can be easily exchanged by disassembling them. As a result, the gear ratio between the gear 2 and the gear 3 can be changed, and the lift amount of the machining shaft lower portion 7b per one rotation of the drive shaft 6, that is, the lift amount (axial movement amount) of the screw tap 9 is arbitrarily adjusted. be able to.
[0017]
On the other hand, the upper gear 4 on the drive side is configured to transmit the rotation of the drive shaft 6 to the upper gear 5 on the driven side. For this reason, the gear 5 rotates, and the screw tap 9 is rotated via the processing shaft upper portion 7 a that is prevented from rotating by the gear 5. For this reason, the gear 4 and the gear 5 transmit the rotation of the drive shaft to the screw tap 9 at a speed corresponding to the gear ratio.
[0018]
Note that the lower end of the plunger 7c fixed to the lower end of the processing shaft upper portion 7a is rotatably supported by the bearing 14 in the processing shaft lower portion 7b. Therefore, the upper gear 5 and the lower gear 3 on the driven side rotate independently and do not affect each other.
[0019]
Further, the lower end of the drive shaft 6 protrudes below the main body 1d, and is connected to the servo motor 11 via the machining shaft joint portion 6a and the flexible shaft 12, as shown in FIG.
[0020]
In the tapping device configured as described above, the drive shaft 6 is rotated by the drive of the servo motor 11, and the gears 2 and 4 on the driving side drive the gears 3 and 5 on the driven side.
For this reason, the upper gear 5 on the driven side rotates the screw tap 9 at a predetermined rotation speed corresponding to the gear ratio with the gear 4.
[0021]
On the other hand, the lower gear 3 on the driven side raises and lowers the screw tap 9 according to the gear ratio with the gear 2 and the screwing pitch between the ball screw 7 d and the ball female screw body 10. For this reason, the screw tap 9 can be moved up and down at a predetermined speed and at a predetermined pitch to make a hole in the workpiece.
[0022]
Next, a burring forming die, a progressive press die insertion / removal type tapping device insertion portion, an outer punching die, a forming die, and a cutting die are simultaneously pressed in parallel in the feed direction of the strip steel base material. with the progressive press die of the press type as the M3 tapped terminal fitting production, it will be explained.
[0023]
First, M3 × P0, 5 tapping screw taps 9 of M3 × P0 and 5 are inserted and fixed at the tip of the processing shaft upper portion 7a facing the upper surface of the main body 1a of the progressive press mold insertion / removal type tapping apparatus having the above-described configuration . Further , as shown in FIG. 1, a progressive press mold insertion / removal type tapping device in which the gear ratio of the gears 2 and 3 is set so that the pitch during one rotation of the screw tap 9 is 0 and 5 mm , The progressive press die is attached and fixed to the press molding machine, and the machining shaft joint 6a of the drive shaft 6 and the servo motor 11 fixed in place on the press molding machine are flexible. It connects via the shaft 12 .
[0024]
The servo motor 11 starts to lower the slide from the top dead center by a rotary cam switch that is interlocked with the slide portion to which the upper mold of the press molding machine is attached . After that, the switch is turned on, and after the bottom dead center at the end of press working, the slide part rises, and the M3 tap is lead 10 turns before the timing of feeding the strip steel base material before the top dead center, and immediately reverses 10 times. Electronically control the lead to return to the origin.
[0025]
The steel strip base material is fed one by one for each stroke of the press molding machine from the first processing step of the press die by the feeding device, tapped in two steps, outer punching, forming, and strip steel in the final process By sequentially separating from the base material, it is possible to produce tapped press products and perform them continuously and automatically .
[0026]
The progressive press mold insertion / removal type tapping device of the above embodiment is described with a transmission mechanism using gears, but the present invention is not limited to this, and examples of transmission means include a belt mechanism and a chain mechanism. It is also possible to configure with other transmission mechanisms.
[0027]
Moreover, the effect of production by the processing method, will be described in comparison with conventional processing methods and the actual example, the time required for M3 tapped terminal fittings 50,000 production, conventionally, a 10 hour pressing In other words, it took 50 hours for the post-processing M3 tapping by a tapping machine.
[0028]
On the other hand, in the press die in which the progressive press die insertion / removal type tapping device of the present invention is inserted, 50,000 M3 tapped metal fittings can be produced in less than 14 hours, resulting in cost reduction. down, reduction of labor costs, a contributing thing to shorten the delivery time.
[0029]
【The invention's effect】
As described above, according to the present invention, the drive shaft is rotatably supported with respect to the main body, and one drive side gear is fixed to the upper and lower portions of the drive shaft. The driven side gear is engaged, and at the lower part of the main body, a ball screw is engaged with the ball female screw body. A lower part of the processing shaft is fixed, and a plunger supported by a spring and partially accommodated in an axially movable and rotatable manner is mounted in a hollow part formed in the lower part of the processing shaft, and protrudes from the hollow part. By fixing the upper end of the processing shaft for screw tap attachment, which is prevented from rotating with respect to the gear on the upper side of the driven side, and is axially movable, to the protruding end of the plunger, the size of the press machine , order sent Press die size, and without limitation to the production volume, also can correspond to the pitch of the number of screw taps by changing the gear ratio of the instrumentation置内gear, can be shared in a mold of various kinds, stamping the it is possible to perform tapping with continuous automatic in.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention.
FIG. 2 is a front view of the main body of the present invention.
FIG. 3 is a bottom view of the main body of the present invention.
FIG. 4 is a cross-sectional view taken along line AA.
FIG. 5 is a perspective view of the inside of the main body of the present invention.
FIG. 6 is a machining shaft structure according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b, 1c, 1d ... Main body 2, 3, 4, 5 ... Gear 6 ... Drive shaft 6a ... Drive shaft joint part 7a Processing shaft upper part 7b ... Processing shaft lower part 7c ... Plunger 7d ... Ball screw 8 ... Collet 9 ... Screw Tap 10 ... Ball female screw body 11 ... Servo motor 12 ... Flexible shaft 13 ... Hollow hollow screw 14 ... Bearing 15 ... Spring 18 ... Progressive press die 19 ... Strip steel base material

Claims (4)

A drive shaft rotatably supported with respect to the main body,
A gear on each drive side fixed to the upper and lower portions of the drive shaft;
Each one of the driven gears in the upper and lower parts meshed with these driving gears;
A ball female screw body attached to a lower portion of the main body and meshing with a ball screw;
A processing shaft lower portion fixed to the upper end of the ball screw, being prevented from rotating with respect to the lower gear on the driven side, and penetrating in an axially movable manner,
In the hollow portion formed at the lower part of the processing shaft, a plunger supported by a spring and partially accommodated in an axially movable and rotatable manner,
Fixed to the protruding end of the plunger protruding from the inside of the hollow portion, and is prevented from rotating with respect to the upper gear on the driven side, and has a processing shaft upper part for attaching a screw tap that is penetrated so as to be axially movable,
A progressive press die insertion / removal type tapping device comprising: The upper drive-side gear and the upper driven-side gear meshing with the upper drive-side gear set the rotational speed of the upper part of the machining shaft according to the gear ratio,
The lower drive-side gear and the lower driven-side gear meshing with the lower drive-side gear set an axial movement amount with respect to one rotation of the upper portion of the machining shaft according to the gear ratio. The progressive press die insertion / removal type tapping device according to 1. The axial load applied to the screw tap is absorbed by contraction of the spring via the upper portion of the machining shaft and a plunger, and damage to the screw tap is prevented. Progressive press die insertion / removal type tapping device. The progressive press die insertion / removal type tapping device according to claim 1 is inserted into a tapping device insertion portion formed at a fixed position of a lower die of the progressive press die, and the progressive press die insertion / removal type The drive shaft and the drive source in the tapping device are connected, and the tapping process is performed simultaneously with the progressive press process by rotating the screw tap forward and backward by an appropriate amount by the drive source during one stroke of the press molding machine. A progressive press die insertion / removal type tapping method.

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