JPS6033615B2 - Turning device in multistage former - Google Patents

Description

[Detailed Description of the Invention] The present invention utilizes a known multi-stage former for forging metal materials using punches and corresponding mold dies to produce forged products such as bolts and nuts in a continuous multi-stage manner. The present invention relates to an apparatus capable of carrying out various types of shaping, such as chamfering, drilling, grooving, and polishing, in addition to punching during the forging process.

Hereinafter, the details will be explained with reference to the embodiments shown in the drawings. Of the plurality of dies 3 fixed in parallel on the front end surface of the underframe 1 facing the punch 2, at least one of the second and subsequent stages is In addition, there is a tool holding shaft 5 which is rotatably supported in the die mounting hole 4 and rotates in conjunction with the tool holding shaft 5, and a material 8 which is attached to a mounting portion 6 at the tip of the tool holding shaft 5 and rotates at the die corps entrance 7 and is pressed against it. A rotary tool 9 for turning is provided, while a punch holder 1 is provided on the side of the corresponding punch 2, and a material holding cylinder 11 for holding the material 8 to be cut next to each other, and a material holding cylinder 11 that moves forward and backward within the holding cylinder. A pushing cylinder 13 that pushes out the material 8 and presses it against the turning tool 9 when the ram 12 moves forward, and a plate cam 14 that supports the rear end 13a of the pushing cylinder and pushes it forward with each movement. The present invention is characterized in that it is provided with a drive device 15.

FIG. 1 is a schematic plan view showing a heading section of a multi-stage former, in which there are five stages of punches 2 and corresponding dies 3, and the present invention is carried out in the fifth stage, which is the final step.

Fig. 2 shows a case in which the material 8 to be turned is hexagonal or other square as shown in Fig. 4a, and a square hole corresponding to the outer shape of the material is formed in the holding cylinder 11 to prevent it from turning. I'm letting you do it.

FIG. 3 shows a case where a chuck 16 is provided to prevent the material from collapsing if it is circular as shown in FIG. 4b.

This chuck i6 is formed at the tip of the pushing cylinder 13 to have a split cylinder shape and a narrowed surface 16a with a tapered outer periphery, which is iron-fitted to a cotton ring 17 fixed integrally with the punch holder 10, and contracts when moved forward. It is configured to grip and hold the material in a non-rotatable manner. In FIGS. 2 and 3, the tool holding shaft 5 is rotatably supported by a bearing 18 in the die mounting hole 4 penetrating back and forth, and a pulley 19 is provided at the rear end to support the motor 2 installed on the underframe 1. They are linked by a river belt 21 and are constantly rotated during operation.

The rotary tool 9 is detachably attached to the attachment portion 6, and in addition to being used for chamfering corners as shown in the illustrated example, various types of rotary tools are used depending on the purpose of use. Reference numeral 22 denotes a kick-out pin which also serves as a support base, and is used to push out the processed material using a well-known PKO device.

23 is a retaining pin, 24 is a lotus pestle, 25 is a pushing force arm,
26 is a pressure pin, 27 is a pressure lever, and the series of mechanisms are the same as those known in the art.

The plate cam 13 is set to be able to rise and fall freely, and has a slanted cam surface 14a formed at the center of its front portion, which is supported by the rear end 13a of the self-pushing cylinder 13. The drive device 15 rotates the pivot shaft 2 every time the push rod 15a is moved up once by a hydraulic or air cylinder, a power motor, or the like.
The bar 29 moves upward using the bar 8 as a fulcrum, and the plate cam 14 is forcibly pushed upward through the bar 29. When this plate cam 14 is pushed up, its front cam surface 14a pushes the pushing cylinder 13 forward (arrow A), so in the case of FIG. 2, the front end pushes the material 8, and in the case of FIG. Then, while moving forward, the chuck 17 at the front of the cylindrical body operates in a voluptuous manner to grasp the material 8 and press it against the rotary tool 9 as it is. When the pressure is released, the material is released from the kick-out pin 22 after the ram retreats.
It is pushed out of the machine. The extrusion of the material by the plate cam 14 is performed when the movable ram moves forward, and the timing is such that the extrusion of the material is started a little before the position where the movable ram is fully advanced.

Further, the extrusion distance is set to such an extent that a slight distance is maintained between the material and the rotary tool 9 when the ram is fully advanced. In this way, the extrusion mechanism operates to press the material onto the rotating rotary tool 9 each time the movable ram moves forward, allowing various turning processes such as cutting, chamfering, and polishing to be performed simultaneously with other heading processes. can be done easily and reliably,
Therefore, work that was conventionally performed separately as secondary processing can be performed during the manufacturing process, so the work can be significantly shortened and production efficiency can be significantly improved. Furthermore, since the mechanisms on the die side and the punch side can be used almost as they are, it is easy and inexpensive to modify existing machines.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic plan view of the heading section of a multi-stage former, and Fig. 2 is a schematic plan view of the heading section of the inventive device.
FIG. 3 is a vertical side view of a second embodiment of the apparatus of the present invention, and FIGS. 4a and 4b are plan views showing examples of materials. DESCRIPTION OF SYMBOLS 1...Underframe, 2.'' punch, 3...Die, 4...Die mounting hole, 5...Tool holding shaft, 6...Tool mounting part, 7...
・Dai Corps Entrance, 8...Materials, 9...Rotary Tools, 10
... Punch holder, 11... Material holding cylinder, 12... Moving ram, 13... Pushing cylinder, 14... Plate cam, 15... Drive device. Figure 4 Figure 1 Figure 2 Illustrated ship

Claims (1)

[Scope of Claims] 1. Among a plurality of dies fixed in parallel on the front end surface of the underframe facing the punch, at least one of the second and subsequent stages is rotatably supported within the die mounting hole. A tool holding shaft is provided, which rotates in conjunction with the tool holding shaft, and a rotating tool is attached to the mounting part at the tip of the shaft and rotates at the die fitting inlet to turn the material pressed against it.On the corresponding punch side,
a material holding cylinder that fits and holds the material to be turned in the punch holder; a pushing cylinder that moves back and forth within the holding cylinder to push out the material and press it against the turning tool when the movable ram moves forward;
A turning device for a multi-stage former, characterized in that it is provided with a plate cam that abuts and supports the rear end of the pushing cylinder and pushes it forward with each operation, and a drive device for the plate cam. 2. The push-holding tube is provided with a chuck body at its distal end that grips the material in an immovable manner when it is pushed by a plate cam. Device.