JPS6033614B2 - Cutting equipment in multi-stage heading former - Google Patents

Description

[Detailed Description of the Invention] The present invention utilizes a multi-stage homer that forges a metal material with a punch and a mold die, and continuously forms forged products such as bolts and nuts in multiple stages. The present invention relates to a device capable of performing cutting operations other than heading using a punch.

When using a multi-stage forging former to cut a metal bar into a predetermined length and pre-heading to form a semi-finished product of an appropriate shape and size, burrs, cracks, or cutting scratches may occur on the forged product. Because of this, it is often necessary to remove it by cutting it in secondary processing, or cutting processing such as grooving and chamfering, but conventionally, all processing was performed after forging by secondary processing. As a result, the production efficiency of heading molded products is reduced, and additional machinery and equipment are required for cutting, which requires additional equipment and labor, leading to higher costs.

The purpose of this invention is to provide a cutting device for a multi-stage heading homer that can solve these drawbacks and perform the cutting required for a pressed product using one step during continuous heading. shall be.

The details of the present invention will be explained below with reference to drawings showing embodiments.

The present invention provides a mold case in which the forging material 5 forged in the previous stage is placed in at least one of the plurality of taris 3, which are fixed in parallel on the front end surface of the underframe 1 facing the punch 2, from the second stage onwards. 4, a chuck mechanism 6 for gripping the material 5 so as to retract it and setting it in the stereotaxic calendar; a rotation mechanism 7 for rotating the gripped material 5 together with the chuck; The cutting tool 8 is characterized in that cutting tools 8 are respectively provided to perform cutting operations such as traversing and chamfering the rotating material.

FIG. 2 is a schematic plan view showing the forging part of the former, with punch group 2 and corresponding die group 3.
* indicates 5 stages, and the present invention is implemented in the 5th stage, which is the final step. The chuck mechanism 6 is equipped in a rotary cylinder 6b with chuck claws 6a arranged at equal intervals around the circumference and expanding radially so as to move forward and backward in the enemy direction and to be held rotatably. The outer periphery of the chuck claw 6a is formed into an outwardly expanding tapered surface 6c so as to be in contact with each other.

With the material 5 inserted into the chuck jaw 6a,
When a is moved backward, the chuck claw 6a is moved to the tapered surface 6.
c, it contracts and grips the material 5, and when it is projected forward, it releases the material 5 for the ship's side. The rotary cylinder 6b is held within the mold case 4 by bearings 9 and rotates together with the chuck. The rotation mechanism 7 consists of a pulley 10 provided on the outer periphery of the rear part of the rotary tube 6b, a belt 11 placed around the pulley 10, a motor 12, etc., and drives the rotary tube 6b when the motor 12 is activated.

On the other hand, a shifter 13 that is rotatable and slidable is loosely inserted into the rotary cylinder 6b from the rear thereof, and the chuck claw 6a is integrally connected to the shifter 13.

The shifter 13 is pushed each time by actuating the shifter lever 15 by the rotation of the cam 14. The cutting tool 8 is placed on the front end surface of the underframe 1 and slides from bottom to top along the guide 16.
A tool mount 8a is connected to a swinging arm 18 that swings up and down using the fulcrum as a fulcrum, and commands are given to this when necessary via a connecting rod 19 by a pushing machine (not shown) using a cam, hydraulic pressure, air cylinder, solenoid, etc. It is operated to perform up and down purge movements. On the punch side corresponding to the chuck mechanism 6, a punch case 20 that moves together with the moving ram is equipped with a rotatable pressing body 2a that is elastically supported by a spring 21 instead of a normal punch. When moving forward, the head of the material 5 is held down to prevent movement blur. In the embodiment, only one tool 8 is provided that protrudes upward from below, but it may be provided horizontally or above, and the tool mount 8a may be provided so as to move forward and backward from two or three directions. A plurality of tools 8 may be provided, and various tools 8 can be arbitrarily replaced depending on the purpose of use.

When the forging material 5 that has completed the first to fourth forging steps is transported to the fifth stage, it is pushed into the chuck claw 6a held in the mold case 4 by the pressing body 2a. At the same time, the chuck claws 6a are retracted rearward by the operation of the cam 14 to strongly grip the material 5. When the motor 12 is driven, the material 5 gripped by the chuck is rotated together with the chuck. In this state, the cutting tool 8 protrudes from below and performs appropriate processing on the rotating material 5. Simultaneously with the completion of machining, the ram retreats, and the chuck jaws 6a expand to release the material. At the same time as other steps, the knockout pins 22 are pushed from behind to push the material 5 forward.
As described above, the present invention utilizes the dies of the necessary stages during the multi-stage heading process, sets the material in position with the chuck mechanism, and can perform cutting processing as desired with the cutting tool. It removes burrs and cutting defects that occur during the final process, and also allows various cutting processes such as cross cutting and chamfering to be easily performed, simplifying the work that was previously performed separately as secondary processing and significantly increasing production efficiency. It is possible to increase the cost and reduce costs.

Furthermore, the structure is simple and can be easily implemented on existing machines, and other effects can be expected.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of a cutting device showing an embodiment of the present invention, Fig. 2 is a schematic plan view of the heading section of a multi-stage heading former embodying the invention, and Fig. 3 a, b, and c are examples of cutting processing. It is a side view of the heading material showing. 1...Underframe, 2...Punch, 3...Die, 4...
- Mold case, 5... Forging material, 6... Chuck mechanism, 7... Rotating mechanism, 8... Cutting tool. Figure 3 Figure 1 Figure 2

Claims (1)

[Claims] 1. Out of a plurality of dies fixed in parallel on the front end surface of the underframe facing the punch, at least one of the dies from the second stage onwards holds the forged material formed in the previous stage so as to be pulled into the mold case. A chuck mechanism for setting the material in a fixed position, a rotating mechanism for rotating the gripped material together with the chuck, and a rotating mechanism for rotating the gripped material together with the chuck, and the tip of the die moves forward and backward in a direction across the tip opening to cut grooves, chamfers, etc. on the material during rolling. A cutting device for a multi-stage heading homer, characterized in that it is equipped with a cutting tool for performing cutting.