JPS6235851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an apparatus for continuously forming long-shaft molded products such as bolts, nails, and rivets in a multi-stage form using punches and dies. When the shaft diameter of the machine is constant, the forging of molded products with different shaft lengths, such as the shaft and drawing parts, can be performed fully automatically without changing dies, punches, or other related items. Regarding equipment.

Conventional technology and problems Molded products with long shafts, such as bolts, are formed into straight round bars in addition to having a drawing part for thread cutting on the shaft, but if you want to forge products with different dimensions using the same machine, If the overall length of the shaft or the length of the drawing part changes, the punch, die, knockout pin, etc. must be replaced with appropriate ones, and it takes a lot of effort and time to change these settings. .

However, if the shaft diameter of such a molded product is constant, the shaft can be adjusted by adjusting the mounting position of the punch or by changing the support position of the knockout pin that serves as the bottom support in the die. The dimensions and the length of the constricted portion can be freely changed.

Technical Problem Therefore, in this invention, it is possible to easily and reliably obtain a molded product with the required dimensions and axial length by setting the mold, especially the adjustment of the support position of the punch and the adjustment of the depth of the die hole, etc., according to instructions from a computer. The technical challenge is to tighten the

Means for Solving the Problem In order to solve the above-mentioned technical problem, the present invention provides a material feeding device A that feeds out the material W by a constant length by rotating the feeding roll 27 intermittently every time the crank 21 reciprocates. , a stopper device B that defines the length, a cutting device 5 that cuts the material, a forging device C that forges the cut material using a punch 3 and a die 4, and a knockout pin 34 that defines a knockout pin 34 at the bottom of the die hole. Knock-out device D that operates to support the forged product in position and protrude after forging to push out the forged product.
In a home machine consisting of
The feed bar 22, which transmits the movement of the crank 21 to the feed roll 27, is attached to the threaded screw 20 so that its length can be adjusted by rotation of the threaded screw 20a.
A is provided with an automatic material feed length adjustment mechanism 20 interlocked with a motor 28, and the stopper device B
This threaded screw 50 is adjusted so that the stopper 52 is adjusted back and forth by the threaded screw 50a.
A is provided with an automatic stopper adjustment mechanism 50 which is linked with a motor 54, and a screw screw 40 is provided on the punch side of the forging device C so that the mounting position of the punch 3 can be moved back and forth by rotation of the screw screw 40a.
Punch automatic adjustment mechanism 4 in which a is linked to a motor 42
Further, in the knockout device D, a motor 35 is attached to the screw 30a to move the knockout pin 34 back and forth in its supporting position.
By providing an automatic die depth adjustment mechanism 30 using knock-out pins that are interlocked with each other, the screws of each of these adjustment mechanisms can be individually screwed.

Example The details will be explained below with reference to embodiment figures.

FIG. 1 is a plan view of the entire home machine equipped with the device of this invention. In the figure, 1 is a main body frame, 2 is a ram that reciprocates back and forth by a crank mechanism, and a plurality of punches 3 are arranged horizontally on the front end surface of the ram. , 3... are provided, and dies 4, 4... and a cutting device 5 are provided on the corresponding main body frame fixed side. The equipment necessary for the setup change is shown in FIGS. 2 to 5.

FIG. 2 shows a material feeding device equipped with an automatic material feeding length adjustment mechanism 20, in which a swinging body 23 is linked to a crank 21 linked to a drive shaft 6 of a ram 2 via a feeding bar 22, and is engaged with a ratchet 24. A one-way mechanism using a pair of claws 25 rotates the feed roll 27 in one direction intermittently through a drive wheel 26 with each reciprocating motion of the crank, and feeds out the material W by a constant length.
Although the swinging angle θ of the swinging body 23 by the crank 21 is constant, if the feed bar 22 is divided into two parts and one of them 22 is moved by the screw 20a to move the slider 20b, the connecting position can be changed. Even if the amount of eccentricity of the crank 21 is constant, the angle θ of the rocking body 23 can be changed freely. The screw 20a is interlocked with a drive device such as a motor 28 via a worm gear mechanism 20c. Therefore, when the motor 28 is operated according to a command, the amount of material fed by the rotation of the feed roll 27 can be adjusted freely.

FIG. 3 shows a knockout device equipped with an automatic adjustment mechanism 30 that adjusts the depth of the die by a knockout pin, and includes a knockout lever 31, a push rod 32, and a knockout pin pedestal 33 provided at the rear of the main body frame 1. Knock out pin 3 through
4 is supported in a fixed position and is pushed after forging to push out the product, but the knockout pin holder 3
A hollow tube that supports the rear end of 3 and serves as a guide for the push rod 32 is made into a threaded screw 30a, which is screwed into the main body frame, and then connected to the gear interlocking mechanism 30b.
When linked to a drive device such as the motor 35 through the
The knock-out pin holder 33 is driven by the motor 35.
The supporting position of the knockout pin 34 can be moved back and forth through the holder to adjust the depth of the hole in the die 4. In this case, the amount by which the push rod 32 is pushed out by the knob lever 31 remains constant.
In the figure, 30c is a fixing screw plate for locking the screw 30a, which is locked by pushing the cylinder 30d.

FIG. 4 shows a forging device section equipped with an automatic adjustment mechanism 40 for the punch mounting position.A punch 3 is inserted into a punch case 41 that moves together with the ram 2 so as to be movable back and forth, and a screw is inserted into the punch 3. A screw 40a is screwed together, and the screw 40a is interlocked with a drive device such as a motor 42 via a worm gear mechanism 40b. In this example, the bolt material is forged in four forging steps, and the product bolt is obtained by thread rolling in the final step. Therefore, punch movement adjustment is not necessary in the first to third steps, so the fourth step is
It is equipped in the process and the final process, but it goes without saying that each punch case in the 1st to 3rd processes can also be equipped if necessary.

FIG. 5 shows an automatic adjustment mechanism 50 incorporated into a stopper device that defines the dimensions of the material W. A stopper 52 is attached to a stopper case 53 that can move back and forth, and the stopper case 53 is inserted into the screw 50a from the rear end. The screw 50a is coupled to a drive device such as a motor 54 via a worm gear mechanism 50b.

Function: The material W is fed out from the supply line stand 60 installed close to the main body frame 1, and is passed through the straightening roll 61,
The material is supplied to the material feeding device on the main body frame side through the pinch rolls 62 and the like.

The material W supplied to the material feeding device is forcibly fed forward by the rotation of the feeding roll 27 and passed through the line guide 29.
from the quill 5a to the tip opening of the quill 5a. Since the stopper 52 is located at a position opposite to the tip opening of the quill, the tip of the material W is received by the end face of the stopper 52, so that the dimensions are regulated.

The cutting device 5 is composed of a quill 5a and a cutting knife 5b that moves across the tip of the quill 5a, and the material is cut by the movement of the cutting knife 5b. The cut material W′ is extruded by a pusher device 70,
The transfer chuck (not shown) transports it to the position just before the die, and as Ram 2 moves forward, each punch 3
Move to Issai and place it on the corresponding die 4.
This is passed sequentially from No. 1 to No. 2, No. 3, etc. for heading, and finally thread rolling to complete the series of processes.

In both Figures 6 and 7, one bolt is fully automatically processed from heading to thread cutting in four steps of heading and one step of final thread rolling, but the shaft diameter d of the product bolt S is the same. The process order is shown in the case where the lengths l and l' of the shaft portion are different, and the lengths l ₁ and l ₁ ' of the drawn portion serving as the threaded portion are different.

In the case of forging a long bolt as shown in Fig. 6, the position of the stopper 52 is first adjusted so that it is set at a position corresponding to the length L of the material W' from the tip opening of the quill 5a, but as shown in Fig. 7. In the case of a short material W ₁ ', the stopper 52 is advanced to adjust the distance to match the length L' of the material. Furthermore, the supporting position of the knock-out pin 34, which serves as a support base at the bottom of the mold hole of the die 4, has a length L ₁ that matches the respective shaft portions in the case of the forging of the log bolt shown in Fig. 6 and the case of the short bolt shown in Fig. 7. Adjust to L ₁ ′, L ₂ , L ₂ ′, L ₃ , L ₃ ′.
Similarly, the mounting positions of the punches 3 are adjusted so that they are at predetermined distances l ₂ , l ₂ ′, l ₃ , and l ₃ ′ from just in front of the dice, respectively, when the ram moves forward.

FIG. 8 is a block circuit diagram when the automatic adjustment of each of the above devices is performed by commands from a computer. When product dimensions are entered into the instruction device 80 by key operations on the keyboard, the processing device 81 executes a predetermined program. Accordingly, the amount of adjustment of each adjustment mechanism with respect to the absolute dimension is calculated, stored in the storage device 82, the data is compared in the comparator 83, and when they match, the necessary command is sent to the controller 84 by an electric signal. send. From the controller 84, a drive mechanism 20 for a material feed adjustment device, a drive device 30 for a knockout pin support position adjustment device, a drive device 40 for a punch mounting position adjustment device, a drive device 50 for a stopper adjustment device, etc. A command corresponding to the quantity is issued and the above-mentioned adjustment is performed.

Effects As described above, the present invention provides the material feeding device A with the threaded screw 20a so that the length of the feed bar 22, which transmits the movement of the crank 21 to the feed roll 27, is adjusted by the rotation of the threaded screw 20a. Material feed length automatic adjustment mechanism 2 that interlocks the motor 28 with
In addition, the stopper device B is provided with an automatic stopper adjustment mechanism 50 that is linked to a motor 54 to the screw 50a so that the stopper 52 can be adjusted back and forth by a screw 50a, and a screw is provided on the punch side of the heading device C. Screw 4
The screw 40a is moved by the motor 42 so that the mounting position of the punch 3 moves back and forth with the rotation of 0a.
The punch automatic adjustment mechanism 40 is linked to the punch automatic adjustment mechanism 40, and the knockout device D is configured to adjust the die depth by the knockout pin, which is formed by linking a motor 35 to the screw 30a so that the support position of the knockout pin 34 moves forward and backward. Automatic adjustment mechanism 30
By providing a When making molded products with different axial lengths, each screw of each adjustment mechanism can be individually screwed in response to an external command without having to replace punches, dies, knockout pins, stoppers, etc. each time. By interlocking these products, it is possible to easily manufacture products with long shafts continuously and fully automatically. Therefore, unlike conventional methods, punches, dies, It is no longer necessary to perform a series of mechanisms such as material feed adjustment by replacing parts, etc., so the so-called setup change work can be performed easily and quickly, improving productivity and accuracy, and providing equipment with excellent quality at low cost. It is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the entire former, FIG. 2 is an enlarged side view of the material feed adjustment device, and FIG. 3 is an enlarged longitudinal sectional side view of the knockout pin adjustment device. , Fig. 4 is an enlarged cross-sectional plan view of a forging section consisting of a punch and die equipped with a device for adjusting the punch attachment position, Fig. 5 is an enlarged cross-sectional plan view of a stopper adjusting device, and Figs. 6 and 7 are cross-sectional views of a bolt. FIG. 8, which is an action diagram showing the order of the forging process, is a block circuit diagram when automatic adjustment is performed by a computer. 1...Body frame, 2...Ram, 3...Punch, 4
...Dice, 5...Cutting device, 21...Crank, 22
...Feed bar, 27...Feed roll, 20...Material feed length automatic adjustment mechanism, 30...Die depth automatic adjustment mechanism, 40...Punch automatic adjustment mechanism, 50...Stopper automatic adjustment mechanism, 20a, 30a, 40a, 50
a...Screw screw, 28, 35, 42, 54...
Motor, A...material feeding device, B...stopper device, C...heading device, D...knockout device, W...
material.

Claims (1)

[Claims] 1. A material feeding device A that rotates the feeding roll 27 intermittently every time the crank 21 reciprocates to feed the material W by a certain length, a stopper device B that defines the length, a cutting device 5 that cuts the material, and a cutting device that a forging device C that forges the pressed material using a punch 3 and a die 4, and a knockout device D that supports a knockout pin 34 in a fixed position at the bottom of the mold hole of the die and operates to protrude after forging and extrude the forged product.
In a home machine consisting of
The feed bar 22, which transmits the movement of the crank 21 to the feed roll 27, is attached to the threaded screw 20 so that its length can be adjusted by rotation of the threaded screw 20a.
A is provided with an automatic material feed length adjustment mechanism 20 interlocked with a motor 28, and the stopper device B
This threaded screw 50 is adjusted so that the stopper 52 is adjusted back and forth by the threaded screw 50a.
A is provided with an automatic stopper adjustment mechanism 50 which is linked with a motor 54, and a screw screw 40 is provided on the punch side of the forging device C so that the mounting position of the punch 3 can be moved back and forth by rotation of the screw screw 40a.
Punch automatic adjustment mechanism 4 in which a is linked to a motor 42
Further, in the knockout device D, a motor 35 is attached to the screw 30a to move the knockout pin 34 back and forth in its supporting position.
An automatic setup change device for a home machine, characterized in that an automatic die depth adjustment mechanism 30 is provided using knockout pins interlocking with each other, so that the screws of each of these adjustment mechanisms are individually screwed.