JPH09122817A - Upsetting device with using press motion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upsetting device mountable to a press machine. SOLUTION: The device is provided with a lower die plate 11, a die guide 12 having a material inserting part and knock out part side by side, a forming die having a shearing part arranged movable between the material inserting part and knock out part, a slide punch 22 arranged slidable to the lower die plate and provided with a forming punch 23 corresponding to the knock out part, an upper die plate 32 mounted to the upper die of press machine, an upper die cylinder 35, which is mounted to the plate, in which a piston arranged with a cylinder punch 33 at its tip is built and which pressurizes the forming die through the punch, and a cam punch 37, which makes the slide punch slide with descending the upper die plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upset device for producing upset parts, particularly rivets or the like made from wire rods, by using press motion in a press machine.

[0002]

2. Description of the Related Art Upset parts such as rivets have hitherto been used.
It was manufactured on a dedicated machine. That is, as shown in FIG. 9 and below, the upset device for the rivet R is a punch 1 having a hemispherical recess 2 corresponding to the head of the rivet, and a punch 1 installed below the punch 1 and having a body and a tip of the rivet. , A die 3 having a deep hole-shaped concave portion 4 corresponding thereto, an ejector 5 arranged so as to project into the concave portion 4, and a supply hole 6 for a wire W provided near the die 3 and in parallel therewith. A wire wire W supply device (not shown), one shearing die 7 provided at the upper open end of the supply hole 6, and a gripping portion 8 for the wire material W also serving as the other shearing die at the tip. It comprises a feeding device 9.

When the rivet R is manufactured by the upsetting device having the above structure, the punch 1 is first raised as shown in FIG. 9, and the wire W is projected from the supply hole 6 by a predetermined length by a supply device (not shown). Then, while the wire W is gripped by the gripper 8, the feeder W pushes the wire W in the direction of the die 3. As a result, as shown in FIG. 10, the wire W is sheared to a predetermined length between the shearing die 7 on one side and the grip portion 8 to become a blank P ′, and the deep hole-shaped recess 4 of the die 3 is formed.
It is transported to the top and held in this state.

Next, the punch 1 is lowered to hold the tip of the blank P ', and the feeding device 9 is reversely driven to allow the gripping portion 8 to escape, while the punch 1 is further lowered to drop the hemispherical recess 2 and the die 3. Molding into the rivet R is performed by the deep hole-shaped concave portion 4 (FIG. 11). When the molding of the rivet R is completed, as shown in FIG. 12, the head portion, the body portion and the tip portion of the rivet R are completely formed.
The grip portion 8 is located so as to surround the supply hole 6 in preparation for the next protrusion of the wire W. As the punch 1 rises, the ejector 5 rises to push the rivet R out of the deep hole-shaped recess 4 as shown in FIG.

[0005]

Since the conventional upset device is a dedicated machine as described above, it has no versatility, and naturally, it requires independent power for each process and a feeder for each process. As a result, the overall structure was complicated and the price was high. Further, in the rivet upset device, the ejector has to be elongated due to the structure of the die, which causes a problem that the ejector is easily broken. In order to solve the above problems, the present inventor
The idea is to install the upset device as described above in a press machine and operate it by using the press motion. The purpose of the present invention is to provide a feed device independent of the power of the upset device itself. It is an object of the present invention to provide an upset device that can be attached to a press machine with a simple structure and low cost without providing the above.

[0006]

An upset device utilizing a press motion according to the present invention comprises a lower die plate to be mounted on a lower die of a press machine, and a material charging portion and a knockout portion which are attached to the plate and which are vertically arranged. A side-by-side mold guide, and a molding die having a shearing portion movably provided between the material charging portion and the knockout portion on one end surface of the mold guide;
A slide punch provided slidably on the lower die plate and provided with a forming punch corresponding to the knockout portion, and an upper die plate attached to an upper die of a press machine,
An upper die cylinder mounted on the plate and having an upper die cylinder punch at the tip thereof, for pressing the forming die through the punch, and a cam punch for sliding the slide punch by lowering the upper die plate It consists of and.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an upset device using the press motion of the present invention will be described in detail with reference to FIGS. Reference numeral 11 denotes a lower mold plate that is mounted on a lower mold (not shown) of the press machine, and serves as a base for mounting a mold guide 12 and a slide punch 22 described below. The mold guide 12 is fixed from the center of the lower mold plate 11 to one end side thereof, and a material charging portion 13 and a knockout portion 14 are vertically arranged side by side. A guide portion 12a is formed in the vertical direction on the end surface of the die guide 12, and a slider 16 provided with a forming die 15 having a shearing portion 15a therein is guided by the die guide slide pins 17 on the left and right while the material charging portion is introduced. A cushion 18 is provided so as to be movable between the knockout portion 13 and the knockout portion 14. In addition, 19 and 20 are stoppers provided at the upper and lower ends of the guide portion 12a, and 21 is a shearing type provided at the end portion of the material charging portion 13 on the guide portion 12a side. A cam slide punch 22 is slidably provided on the lower die plate 11, a head forming punch 23 is provided on the side corresponding to the knockout portion 14, and a slope cam 24 is provided on the upper surface of the other side. .

The knockout section 14 is provided with an end forming die 25 provided facing the guide forming portion 12a so as to face the head forming punch 23, and a knock pin 26 which is inserted into and removed from the forming die 25. The ejector 27 includes an ejector 27.
A bolt 30 is connected to one end of an elastic member 29 such as a urethane block via the bolt 8. The other end of the elastic member 29 is fixed on the lower mold plate 11, and the elastic member 29 has one end attached to the operating plate 28 and a slide bar 31 penetrating the mold guide 12 in the left and right direction. And is compressed by the cam slide punch 22.

Reference numeral 32 denotes an upper die plate mounted on an upper die (not shown) of the press machine. The plate 32 has an upper die cylinder 35 having a piston 34 having an upper die cylinder punch 33 at the tip thereof. , A sloped cam 36 is provided on the lower surface, and the slide punch 22 is moved by lowering the upper die plate 32.
A cam punch 37 for sliding is attached. Reference numeral 38 denotes the piston 3 in the upper cylinder 35.
A spring for pressing 4 and 39 are guide and position regulating members for the cam punch 37.

A process of forming a rivet by the upsetting device of the present invention having the above-described structure will be described. Forming a rivet by the upset device of the present invention is a material supply,
It consists of the steps of material shearing, transportation, upset molding, knockout, transportation, and product unloading. The first step is a step in which the product is unloaded at the same time as the material is supplied. As shown in FIG. 3, with the slider 16 held by the stopper 19 at the upper end of the guide portion 12a of the die guide 12, the material is loaded. The wire W is inserted into the portion 13 by a predetermined size, and the tip of the wire W projects from the molding die 15 by the amount corresponding to the head molding, and the product rivet R is pushed out from the molding die 15 (product unloading). This shows the position of (a) in the diagram showing the relationship between the operation of each member of the upset device of the present invention and the press machine shown in FIG. 8 and the cycle time. In the first step, from the moment when the upward movement of the slider 16 is restrained and held by the stopper 19, the upper die plate 32 rises to the top dead center and then descends by the press motion of the pressing machine. , The tip of the upper cylinder punch 33 contacts the upper end of the slider 16, and then the upper end of the piston 34 compresses the spring 38 and the cylinder stopper 3
It is performed until it contacts 5a.

The second step is material shearing, in which the tip of the upper cylinder punch 33 contacts the upper end of the slider 16 as described above, and the upper end of the piston 34 then compresses the spring 38 and contacts the cylinder stopper 35a. From the state, as shown in FIG. 4, the slider 16 is pushed down together with the cushion 18 along the die guide slide pin 17 through the upper die punch 33, so that the wire W is sheared by the shaping die 15 and the shearing die 21. It is sheared to a predetermined size at 15a (position (b) in FIG. 8).

The third step is to make the wire W after shearing into the fourth wire.
It is a step of carrying to the position of the head forming punch 23 for performing the above step. As shown in FIG. 5, at the moment of shearing, the spring 38 in the upper die cylinder 35 expands to hold the sheared material W ′ in the forming die 15 and the slider 16 suddenly moves. After that, the slider 16 moves downward as the upper die plate 32 descends due to the press motion, and the lower end of the slider 16 contacts the stopper 20 at the position where the center of the material W ′ coincides with the center of the head forming punch 23. Stop by touching (position (c) of FIG. 8).

The fourth step is a step of performing upset molding on the sheared material W '. This is because the slope cam 36 of the cam punch 37 starts to come into contact with the slope cam 24 of the cam slide punch 22 just before the center of the material W ′ coincides with the center of the head forming punch 23 by the conveyance in the previous step, and the piston 34 The cam slide punch 22 until the upper end of the cylinder abuts the cylinder stopper 35a.
As shown in FIG. 6, they are moved to the right on the lower mold plate 11 to form a hemispherical head with the head forming punch 23 on the material W ′, a body part with the forming die 15, and further end forming. The ends are respectively molded by the mold 25 (position (d) in FIG. 8). On this occasion,
By moving the cam slide punch 22 to the right, the elastic member 29 is compressed by the operating plate 28 via the slide bar 31, and elastic force is stored. Further, when the operating plate 28 is moved to the right, the ejector 27 and the knock pin 26 are moved to the right via the bolt 30, and when the material W ′ is molded, the knock pin 26 is separated from the tip of the material W ′, which hinders the molding. I try not to.

The fifth step is to form the formed rivet R.
Is the step of performing a knockout of. That is, as the upper die plate 32 rises as the upper die of the press machine rises, the cam slide punch 22 returns to the left as shown in FIG. 7 via the slide bar 31 by the elastic force of the elastic member 29,
The rivet R is knocked out and its tip is the molding die 15
It is pushed in (position (e) in Fig. 8). In this step, the slider 16 does not move even if the upper die plate 32 moves up because the spring 38 in the upper die cylinder 35 is made larger than the force of the cushion 18.

In the sixth step, contrary to the third step, the shearing portion 1 shown in FIG.
It is a step of carrying to the position of 5a or the material charging portion 13. This is a process in which the cushion 18 is raised by raising the upper mold plate 32 from the state of FIG. 7, whereby the slider 16 rises while supporting the rivet R, and abuts on the stopper 19 to stop. (Position (f) in FIG. 8).

The rivet R can be easily changed, for example, by changing the forming die 15 when changing the length and diameter, and by changing the head forming punch 23 when changing the head shape. The cycle time of the press machine can be changed. It can be determined by the number of strokes per minute. Further, although the above description has been made by taking the rivet as an example of the product, the present invention can be applied to bolts, pins and the like in addition to rivets.

[0017]

As described above, according to the present invention, the lower die plate mounted on the lower die of the press machine, the die guide attached to the plate and having the material charging portion and the knockout portion arranged side by side in the vertical direction, A mold having a shearing part movably provided between the material charging part and the knockout part on one end surface of a mold guide, and slidably provided on the lower mold plate,
A slide punch provided with a forming punch corresponding to the knockout portion, an upper die plate mounted on the upper die of the press machine, and a piston attached to the plate and having an upper die cylinder punch at the tip are internally provided, The upsetting device itself is unique because it is an upsetting device that uses a press motion consisting of an upper die cylinder that presses the forming die through the punch and a cam punch that slides the slide punch by lowering the upper die plate. It is possible to provide an upset device that can be attached to a low-priced press machine with a simple structure, because it is possible to perform upset molding and conveyance using the press motion of a general-purpose press machine without providing a feed device independent of the power of Along with using one mold, you can perform shearing and molding only by moving it for a short distance. The thicker the ejectors was easily broken can not be thickened with conventional dedicated machine can prevent damage by providing a product and coaxially, there is an effect that can respond to various product requirements by converting the mold.

[Brief description of the drawings]

 ,, transport,

FIG. 1 is a front view of an upset device of the present invention.

FIG. 2 is a plan view of the upset device of the present invention.

FIG. 3 is a partial cross-sectional front view showing first (material supply) and sixth (product unloading) steps by the upset device of the present invention.

FIG. 4 is a partial cross-sectional front view of a main part showing a second (material shearing) step by the upset device of the present invention.

FIG. 5 is a partial cross-sectional front view of an essential part showing a third (conveying) step by the upset device of the present invention.

FIG. 6 is a partial cross-sectional front view of an essential part showing a fourth (upset molding) step by the upset device of the present invention.

FIG. 7 is a partial cross-sectional front view of an essential part showing a fifth (knockout) step by the upset device of the present invention.

FIG. 8 is a diagram showing the relationship between the operation of each member of the upset device of the present invention and the press machine and the cycle time.

FIG. 9 is a schematic view showing a material inserting step by a conventional upset device.

FIG. 10 is a schematic view showing material shearing and conveying steps by a conventional upset device.

FIG. 11 is a schematic view showing an upset molding step by a conventional upset device.

FIG. 12 is a schematic view showing an upset molding finishing step by a conventional upset device.

FIG. 13 is a schematic view showing a knockout step by a conventional upset device 11 lower die plate 12 die guide 13 material charging portion 14 knockout portion 15 forming die 16 slider 17 type guide slide pin 18 cushion 19, 20 stopper 21 shearing type 22 Cam Slide Punch 23 Head Forming Punch 24 Slope Cam 25 End Forming Mold 26 Knock Pin 27 Ejector 28 Actuating Plate 29 Repulsive Member 30 Bolt 31 Slide Bar 32 Upper Mold Plate 33 Upper Cylinder Punch 34 Piston 35 Upper Mold Cylinder 36 Slope Cam 37 Cam punch 38 Spring 39 Guide and position regulating member W Wire rod W'Sheared material R Product (rivet).

Claims (1)

[Claims] 1. A lower mold plate to be mounted on a lower mold of a press, a mold guide attached to the plate and having a material charging section and a knockout section arranged side by side, and the above-mentioned one end surface of the mold guide. A forming die having a shearing portion provided movably between the material charging portion and the knockout portion, and a slide punch provided slidably on the lower die plate and having a forming punch corresponding to the knockout portion. An upper die plate mounted on an upper die of a press machine; and an upper die cylinder attached to the plate, having a piston provided with an upper die cylinder punch at a tip thereof, and pressing the forming die through the punch; An upset device using press motion, comprising: a cam punch that slides the slide punch by lowering the upper die plate.