JP3117897U - Forging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mechanically insert and remove a shaft protecting pin into and from a hole in a shaft portion of an intermediate material, and to flatten only a massive head easily and quickly under such a pin inserted state. A forging machine that can be forged into a shape.
SOLUTION: A die 3 having a recess 31 for forming a flat head and an insertion hole 32 for inserting a shaft portion continuous with the recess 31; and a recess 31 of a ram 5 that moves forward and backward with respect to the die 3. The flat plate-shaped head forming punch 6 provided at the opposing position, the shaft pressing member 14 provided at the opposing position to the insertion hole 32 of the ram 5, and the intermediate material A at the front face of the die 3 A transfer device 12 for transferring in an upright state, and a shaft portion protecting pin 21 that can be inserted into the hole portion a of the shaft portion A1 of the intermediate material A transferred to the front surface position of the die 3; 3 and a pin insertion device 20 supported so as to be movable in the vertical direction and the front-back direction.
[Selection] Figure 2

Description

  In the present invention, a hollow shaft portion having a hole opening at one end and an intermediate material having a massive head portion at the other end of the shaft portion, only the massive head portion is forged and flattened at the other end of the shaft portion. The present invention relates to a forging machine that forms a molded product having a head.

  Conventionally, for example, in the case of manufacturing a metal product having a hollow shaft portion having a hole opening at one end and a flat head at the other end of the shaft portion, a hollow shaft portion having a hole portion having one end opened. An intermediate material having a massive head at the other end of the shaft is used, and only the massive head of the intermediate material is forged to form a flat head at the other end of the shaft. In that case, there is a problem that if the head portion is pressed into a flat shape while the shaft portion is hollow, the shaft portion is simultaneously deformed and cannot be used as a product. In order to prevent the deformation of the shaft portion, a pin for protecting the shaft portion is used, the pin is manually inserted into the hole portion of the shaft portion, and set in the forging machine under such pin insertion state, A flat head is formed without deforming the shaft by deforming only the massive head into a flat shape with a molding machine.

Problems that the device tries to solve

  However, according to the forging machine described above, it is necessary to manually insert the pin into the hole of the shaft portion and set it in the forging machine under such a pin insertion state. Therefore, there is a problem in that the work is complicated, the work is troublesome, mass production cannot be performed, and the cost is high.

  Therefore, the present invention enables the shaft protection pin to be inserted into and removed from the shaft hole in the intermediate material mechanically without manual operation. An object of the present invention is to provide a forging machine that can easily and quickly forge.

Means for solving the problem

  In order to solve the above-described problem, the present invention forges only a massive head from a hollow shaft portion having a hole portion having one end opened and an intermediate material having a massive head portion at the other end of the shaft portion. A forging machine for forming a molded product having a flat head at the other end of the shaft part, the die having a concave part for forming a flat head part and an insertion hole of the shaft part continuous to the concave part; A flat plate-shaped head-forming punch provided at a position facing the concave portion of the ram that moves forward and backward with respect to the die, and a presser for a shaft pressing member provided at a position facing the insertion hole of the ram And a transfer device for transferring the intermediate material to the front position of the die in a standing state, and a shaft protecting pin that can be inserted into the hole of the shaft portion of the intermediate material transferred to the front position of the die, And a pin insertion device that supports the pin so as to be movable in the vertical direction and the front-back direction with respect to the die The pin is inserted into the hole of the shaft portion of the intermediate material transferred to the front surface of the die by the transfer device, and then the intermediate material is moved by the presser body and the punch by advancing toward the die side of the ram. While the pin is inserted, it is pushed into the back of the insertion hole, and only the massive head is press-fitted into the recess by punching to form a flat head. And the pin is pulled out from the hole of the shaft portion.

Effect of device

  According to the forging machine according to the present invention, a pin for shaft protection is inserted by a pin insertion means into the hole of the shaft of the intermediate material transferred in a standing state to the front surface of the die, and then to the die side of the ram. By pushing forward, the shaft part of the intermediate material is pushed into the inner part of the insertion hole part with the presser body and punch inserted, and only the massive head part is press-fitted into the concave part by the punch to form a flat head part. After the molding is completed, the pin is lowered and the pin is pulled out from the hole of the shaft part along with the retraction of the punch and the presser body. Therefore, the shaft protection pin is mechanically inserted into the hole of the shaft part. After the forging, the pin can be mechanically pulled out from the hole in the shaft. This eliminates the troublesome manual work and makes it easy and quick for only the massive head. Forging into a flat shape Can, it is possible to achieve mass production.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to FIG. 2 show an intermediate material A having a hollow shaft portion A1 having a hole a having one end opened as shown in FIGS. 3 and 4 and a massive head portion A2 at the other end of the shaft portion A1. 6 shows a forging machine for producing a molded product S having a flat head S2 at the other end of the hollow shaft S1 having the hole a by forging only the massive head A2 shown in FIG. As shown in FIG. 1, the forging machine 1 basically has a die block 4 having a die 3 disposed at a predetermined position of a machine base 2, and a die block on the machine base 2 in front of the die block 4. A ram 5 that is moved forward and backward with respect to 4 is provided, and a punch 6 corresponding to the die 3 is attached to the front surface of the ram 5, and the intermediate material A is die-cut by the punch 6 as the ram 5 advances toward the die side. 3 is driven into the forging process. In addition, a shooter 7 for supplying the intermediate material A is provided on one side of the die 3, and an upright intermediate material A fed from the discharge port of the shooter 7 is squeezed by the extrusion device 8. A transfer device 12 having a material transfer chuck 11 is provided above the die block 4 to intermittently feed it to the immediately preceding part and feed it forward by the quill 9 while holding it and transferring it to the front position of the die 3 while standing. It is the composition provided in.

  In the forging machine 1 of the present invention, the die 4 provided in the die block 4 includes a flat head-forming concave portion 31 and an intermediate material A continuous to the concave portion 31 as shown in FIGS. The insertion hole 32 for holding the shaft part is held by sliding in the front-rear direction through a receiving hole 32a formed in the die 3 and a through hole 32b formed in the center of the receiving hole 32a. It consists of a bracket 32c. The holding bracket 32c has a concave curved surface 32d that receives the shaft portion A1 at the front end thereof, and one end portion of the first spring 33 is fixed to the rear end portion of the holding bracket 32c. The die 3 is urged so as to be positioned substantially at the front surface position. A tip end portion of the knockout pin 34 is fixed to the other end portion of the first spring 33, and the holding bracket 32c is opposed to the first spring 33 in the retracted position of the knockout pin 34 as shown in FIG. 9, when the rear end portion of the holding bracket 32c and the front end portion of the knockout pin 34 come into contact with each other, the holding bracket 32c is located at a position where the concave portion 31 and the concave curved surface portion 32d are continuous. The movement to the back side is prevented. Further, after the forging is completed, the first spring 33 is extended along with the retraction of the punch 6, and the molded product S is pushed forward by the movement of the knockout pin 34 from the retreat position to the front side of the die 3. . After the pushing, the knockout pin 34 is returned to the retracted position, and then a new forging operation is started.

  On the other hand, as shown in FIGS. 2 and 10, the ram 5 has a flat plate-shaped head forming punch 6 provided at a position facing the recess 31 in the die 3, and a holding bracket 32 c for the insertion hole 32. And a pressing member 13 for holding the shaft portion provided at a position opposite to the shaft. The presser 13 is slidably supported by the ram 5 and is always urged by the second spring 14 so as to protrude from the tip of the punch 6 to the die 3 side, and a predetermined load is applied. The second spring 14 is compressed so as to escape to the ram 5 side.

  As shown in FIGS. 1 and 2, below the die block 4, a shaft portion protecting portion that can be inserted into the hole portion a of the shaft portion A <b> 1 of the intermediate material A transferred to the front surface position of the die 3. A pin insertion device 20 having a pin 21 and supporting the pin 21 so as to be movable in the vertical direction and the front-back direction with respect to the die 3 is provided. The pin insertion device 20 includes a fixed case 22 fixed to a lower portion of a die block 42, a slide body 23 supported by the fixed case 22 so as to be slidable in the front-rear direction of the die 3, and an intermediate portion of the slide body 23 A pin support 24 that penetrates the frame, a U-shaped support frame 25 provided in the machine body 2 below the fixed case 22, a swinging body 26 provided below the support frame 25, and movable up and down in the support frame 25. And a connecting body 27 that supports the lower portion of the pin support 24 so as to be movable in the front-rear direction of the die 3, and a connecting link 28 that connects the lower portion of the connecting body 27 and the swinging body 26. Yes.

  Specifically, the fixed case 22 includes a guide hole 22a penetrating vertically at the center thereof and a lateral hole 22b communicating with the guide hole 22a. The sliding body 23 includes a boss portion 23b having a through-hole 23a penetrating vertically in an intermediate portion, and front and rear sliding rods 23c and 23c extending in the front-rear direction from the boss portion 23b. The front side of the horizontal hole 22b is opened, and the front end of the sliding body 23 can protrude forward from the fixed case 22, while a closed chamber 22c is formed on the rear side of the horizontal hole 22b. The closed chamber 22c is provided with an air supply device P such as an air pump for supplying air into the closed chamber 22c and sliding the sliding body 23 toward the front position of the die.

  The pin support 24 is pierced and supported so as to be vertically movable with respect to the through hole 23a of the sliding body 23, and a shaft protecting pin that can be inserted into the hole a of the shaft A1 of the intermediate material A at the upper end thereof. 21 is supported via an urging spring 29 so as to normally protrude upward, and a roller 30 is provided at the lower end. The connecting body 27 has a guide groove 27a that extends in the front-rear direction and opens upward, and supports the roller 30 of the pin support 24 so as to be movable in the front-rear direction. Further, the swinging of the swinging body 26 is such that the swinging shaft 26 a that supports the swinging body 26 is connected to the transmission path of the ram 5 via a cam interlocking mechanism (not shown), and is synchronized with the longitudinal movement of the ram 5. It is swung up and down intermittently. That is, when the intermediate material A is transferred to the front surface position of the die 3 and the ram 5 begins to move forward, the swinging body 26 is swung upward, and the pin support 24 is raised via the connecting link 28 and the connecting body 27. The pin 21 is inserted into the hole a of the shaft portion A1 of the intermediate material A. Further, after the bulk head A2 of the intermediate material A is formed into a flat punch shape, the swinging body 26 is swung downward at the timing when the ram 5 starts to move backward, and the pin is connected via the connecting link 28 and the connecting body 27. The support 24 is lowered and the pin 21 is pulled out from the hole a of the shaft portion A1 of the intermediate material A.

  At the lower part of the ram 5, there is provided a pusher 40 that pushes the sliding body 24 into the back side of the die 3 at almost the same timing as the press of the shaft part A1 of the presser body 13 for pressing the shaft part. The pusher 40 is slidably supported by the ram 5 and is always urged by the third spring 41 so as to protrude toward the die 3 side. When a predetermined load is applied, the third spring 41 is moved. It is attached to compress and escape to the ram 5 side.

  The spring force of the first spring 33 is set larger than the spring force obtained by adding the spring force of the third spring 41 to the spring force of the second spring 14.

Next, the operation of the forging machine configured as described above will be described.
First, the upright intermediate material A supplied by the shooter 7 is intermittently sent to the front portion of the quill 9 by the extrusion device 8, which is fed forward by the quill 9, and gripped by the material transfer chuck 11. As shown in FIG. 1, the wafer is transferred to the front part of the die while standing.

  Next, after the intermediate material A is transferred to the immediately preceding portion of the die 3 by the transfer chuck 11, the ram 5 is advanced to the die 3 side as shown in FIG. The pin support 24 is raised through the connecting link 28 and the connecting body 27, and the pin 21 is inserted into the hole a of the shaft A1 of the intermediate material A.

  Then, as shown in FIG. 12, the presser body 13 for pressing the shaft portion comes into contact with the shaft portion A1 of the intermediate material A by the advancement of the ram 5 toward the die 3 side and starts pressing the shaft portion A1. At almost the same time, the pushing body 40 comes into contact with the front surface of the sliding body 23 and pushes the sliding body 23 into the back side of the die 3. Accordingly, the intermediate material A, the pin support 24 and the sliding body 23 move to the back side of the die 3 while the pin 21 is inserted into the shaft portion A1 of the intermediate material A.

  Thereafter, when the ram 5 further advances as shown in FIG. 13, the shaft portion A <b> 1 of the intermediate material A comes into contact with the holding bracket 32 c of the die 3. Due to this contact, the movement of the intermediate material A toward the back side of the die 3 is prevented, and only the punch 6 advances together with the ram 5 toward the massive head A2 side of the intermediate material A. That is, the spring force of the first spring 33 in the holding bracket 32 c is set to be larger than the spring force obtained by adding the spring force of the third spring 41 in the pusher 40 to the spring force of the second spring 14 in the presser 13. Therefore, the 2nd spring 14 and the 3rd spring 41 are compressed, and advance of the above-mentioned presser 13 and pusher 40 is blocked.

  Furthermore, as shown in FIG. 14, the punch 6 hits the massive head A <b> 2 of the intermediate material A by the advancement of the ram 5 and the punch 6. Thereby, the intermediate material A can be pushed into the back side of the die 3 by the punch 6. That is, when the punch 6 is pushed in, the first spring of the holding bracket 32c is compressed, so that the pin 21 is inserted into the hole a of the shaft portion A1 of the intermediate material A, and the intermediate material A and the pin support 21 Then, the sliding body 23 and the holding bracket 32c move to the back side of the die 3. In that case, the pressing body 13 and the pressing body 40 are also in a state where the second spring 14 and the third spring 41 are in a compressed state, that is, the intermediate material A is maintained by holding the shaft portion A1 between the pressing body 13 and the holding bracket 32c. The head 3 moves forward toward the back side of the die 3 while accurately maintaining the standing posture.

  Thereafter, as shown in FIG. 15, the pin 21 is inserted into the shaft portion A1 as the intermediate material A is pushed into the back side of the die 3 by the punch 6, and the shaft portion A1 is held by the presser 13 and the holding bracket 32c. The intermediate material A is pushed into the back of the die 3 in the state where it has been pressed, the massive head A2 is pushed into the recess 31 of the die 3 by the punch 6, and the forging of the massive head A2 is performed by the punch 6 and the recess 31 of the die 3. Processing will be started.

  Then, as shown in FIG. 16, the massive head A2 is press-fitted into the recess 31 by the punch 6 to form a flat head S2.

  After the molding is completed, the ram 5 is retracted in the direction away from the die 3 and the swinging body 26 of the pin insertion device 20 is swung downward at the same timing as shown in FIG. 27, the pin support 24 is lowered, and the pin 21 is pulled out from the hole a of the shaft A1 of the intermediate material A. Thereafter, air is supplied to the sealed chamber 22c by the air supply device P, and the pin support 24 is advanced to the ram 5 side together with the sliding body 23 to move to the initial position in FIG. Further, the forging operation is completed by pushing the molded product S forward from the die 3 by dropping the knockout pin 34 toward the ram 5 and dropping it from the die 3.

  As described above, the shaft protecting pin 21 can be mechanically inserted into and removed from the hole a of the shaft A1 in the intermediate material A, and easily and quickly under such a pin inserted state. Only the massive head can be forged into a flat shape.

  In the above embodiment, the single-stage forging machine has been described. However, the multi-stage forging in which the intermediate material A is formed by sequentially forging at a plurality of forging stations arranged in parallel from one bar-shaped material. The forging machine of the present invention may be arranged in parallel on the rear side of the molding machine so that the molded product S having a flat head can be consistently forged by a multistage forging machine from a single bar-shaped material. Of course. Further, for example, in the forging machine of the above-described embodiment, a die and punch for punching, for example, and a pin insertion device similar to that of the previous embodiment are arranged in parallel to the knockout. The molded product S pushed out by the pin 34 is fed to the front surface position of the rear die by the transfer means, and the belt insertion hole (in the flat head S2 of the molded product S by the rear die, punch and pin insertion device ( (Not shown) may be formed by punching.

  It is a front view of the principal part of the forging machine based on this invention.   It is the same side view.   It is a front view of an intermediate material.   It is a top view of the intermediate material.   It is a front view of a molded product.   It is a top view of the molded product.   It is a front view of die | dye.   It is a vertical side view of the principal part in the die.   It is longitudinal section explanatory drawing of the principal part at the time of completion | finish of the same forging.   It is a front view of the ram side.   It is explanatory drawing at the time of pin insertion.   It is a movement explanatory view of an intermediate material in a pin insertion state.   It is explanatory drawing which shows the axial part holding | maintenance state of an intermediate material.   It is explanatory drawing which shows the pushing start state of the intermediate material by a punch.   It is explanatory drawing which shows the forging start state of the intermediate raw material by a punch and die | dye.   It is explanatory drawing which shows the forging completion state of the intermediate raw material by a punch and die | dye.   It is explanatory drawing which shows a pin pull-out state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forging machine 3 Die 5 Ram 6 Punch 12 Transfer means 13 Presser body 20 Pin insertion device 21 Pin 31 Recess 32 Insertion hole A Intermediate material A1 Shaft A2 Massive head a Hole S Molded product S1 Shaft S2 Flat head

Claims (1)

  Only a massive head is forged from an intermediate material having a hollow shaft portion having a hole portion open at one end and a massive head portion at the other end of the shaft portion, and a flat head portion is provided at the other end of the shaft portion. A forging molding machine for forming a molded product, comprising: a die having a concave portion for forming a flat head and an insertion hole portion of a shaft portion continuous with the concave portion; and the concave portion of the ram moving forward and backward with respect to the die; The flat plate-shaped head forming punch provided at the opposed position of the ram, the presser body for holding the shaft portion provided at the position opposed to the insertion hole of the ram, and the intermediate material standing at the front position of the die And a shaft protection pin that can be inserted into the hole of the shaft portion of the intermediate material transferred to the front surface position of the die, and the pins are vertically and longitudinally with respect to the die. And a pin insertion device supported movably on the front surface of the die. The above-mentioned pin is raised into the hole of the shaft portion of the intermediate material that has been inserted, and then the pin is inserted, and then the intermediate material is inserted into the pin with the presser body and punch moved forward to the die side of the ram. And pressing the bulky head into the recess by punching to form a flat head. After the molding is finished, the pin is lowered and the pin is lowered from the hole of the shaft part with the retraction of the punch and the presser body. A forging machine characterized in that it is configured to pull out the wire.

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