JPH0235382Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention uses a punch and a corresponding mold die to sequentially press metal materials from coarse to fine to create bolts, bearing metals, bushings, collars, etc. Using a multi-stage former that continuously manufactures hollow or non-hollow products in multiple stages, processes such as thread rolling, grooving, and marking coining (stamping) are performed by rolling during the heading process. This invention relates to a device that continuously and fully automatically performs rolling in a consistent flow process.

(Prior art) A device that incorporates a rolling mechanism into one of the heading sections consisting of several stages so that the process from heading to rolling can be carried out continuously in a consistent flow process is known, for example, from the Utility Model Act of 1973. This method has been proposed by the applicant as shown in No.-35316, etc. A known rolling device uses a rolling bar to move the rolling bar linearly while pressing the material against the rolling bar, but the side that supports the material can freely rotate the two roll-shaped supports. It was a rolling support system.

Therefore, if the material is supported by a roll support and the rolling bar is moved directly, the roll support will follow the rotation of the material, so if the pressure is too strong, the rolled part may be crushed or the rolled part may be There was a risk that the pads would slip, and if the pressure was weak, slips could occur.

(Technical Problem) Therefore, in the present invention, the rotary side facing the rolling bar is not made into a support that rotates drivenly, but is actively driven in conjunction with the rolling bar, and the rotary side itself is made to be actively driven in conjunction with the rolling bar. The ultimate challenge is to create rolling dies.

(Technical means) In order to achieve the above object, the rolling device in the homer of the present invention sends a continuous metal material to the tip of the quill using a feeding device, and moves it across the tip of the quill. a cutting device that cuts the cut material to a certain length with a movable cutter, and a heading section that sequentially feeds the cut material from coarse to fine and presses it with a punch and die to form a headed product (rolled material) such as bolt material, In a multi-stage former, the rolling part is provided with a rolling part that supplies the rolling material formed in the heading part to a position adjacent to the heading part in the same row and performs rolling. A rotary rolling die that is rotatably supported parallel to the die axis of the heading section adjacent to the forging section, and a rotary rolling die that moves directly in the vertical direction orthogonal to the axis of the rotary rolling die. One rolling bar is placed at a predetermined interval to serve as a rolling action section, and the rolling material formed in the heading section is pushed into the rolling action section between the two when the movable ram moves forward. A press rod is provided on the punch side so as to feed the rotary rolling die, and the rotary rolling die is configured to be linked to the movement of the rolling bar via a rack attached to the rolling bar and an intermediate gear. It is.

Preferably, the rolling bar and the rotary rolling die are interlocked with a drive device such that the rolling bar and the rotary rolling die are started before the front dead center of the movable ram and are terminated immediately after the front dead center.

Further, a pedestal may be provided in the rolling action portion between the rolling bar and the rotary rolling die so as to support the rolling material from below.

Further, a guide portion is provided at the lower end of the rolling bar for leading and holding at the time of starting rolling.

(Function) In FIG. 1, when a continuous metal material W is sent out from the tip end of the quill 10 and received by the stopper 11, the movable cutter 12 moves across the tip end to cut the metal material into a fixed size. disconnect.

The cut material is from the first die 13 to 2
It is carried just before each die 14, 15, 16 of number 3, etc., and the corresponding punch 17, 18, 1 each time.
By moving the moving rams 9 and 20 forward and upsetting the material into the die hole, a material 1 for rolling a heading product such as a bolt material is formed by heading.

As shown in FIG. 2, the rolled material 1 taken out from the die 16 is grabbed by the transfer chuck 21 at the same time as extrusion and transported to the rolling section, and the moving ram pushes the press rod 23 provided on the punch mount 22. When moving forward, the rolling material is forced into a rolling action section S between the rolling bar 2 and the rotary rolling die 3.

In FIG. 3, when the rolling bar 2 descends in the direction of arrow A, the rack 4 attached to the rolling bar 2 moves together, so that the rolling drive gear 6 is connected to the rolling drive gear 6 through the intermediate gear 5 that meshes with the rack teeth 4a. Then, the rotary rolling die 3 is rotationally driven in the counterclockwise direction (arrow B). Therefore, rotary rolling die 3 and rolling bar 2
Since the rolled material 1 sandwiched between them is simultaneously subjected to upward and downward rubbing forces by both rolling surfaces 3a and 2a, it is thread-rolled while rotating clockwise while being supported in a fixed position. A screw 1b is cut into the portion 1a.

The timing at which the rolling bar 2 starts descending is just before the front dead center when the moving ram moves forward and the punch mount 22 reaches the frontmost position.

The push rod 23 has a spring (not shown) in its mounting part.
It is designed to push the product in against the spring pressure by taking advantage of the spring pressure.

(effect) The present invention has the following unique effects.

The forged product is directly supplied from the forging section to the rolling section, and processes such as thread cutting, grooving, and marking can be continuously performed by rolling in synchronization with the forging section.

Since the rotary rolling dies facing the rolling bar are actively driven in conjunction with each other via racks and intermediate gears, the material subjected to rolling action is simultaneously subjected to rubbing forces in the vertical and horizontal directions. It is possible to reliably perform highly accurate rolling processing without causing slips or deviations.

During the rolling process, the material is supported in a fixed position and does not move up and down.

Rolling can be performed on both hollow and non-hollow products.

Rolling can be performed before and after the front dead center of the movable ram, making it easy to match the timing of the heading process.

(Example) Fig. 1 shows the whole of a multi-stage former in which the present invention was implemented, and is equipped with a cutting device on the left side of the figure, a heading section consisting of four heading stages in the middle, and a rolling section on the right side. ing.

The cutting device cuts the continuous metal material W into a quill 10.
The quill is intermittently fed out by a feeding device (not shown) so as to protrude from the tip end of the quill, and cut into a fixed length by a movable cutter 12 that moves across the tip end of the quill. A stopper 11 is provided opposite the tip end of the quill at a predetermined interval, and the stopper defines the dimensions to be constant.

The forging section includes dies 13, 14, 15, and 16 numbered 1 to 4 arranged in parallel at predetermined intervals, and a movable ram 22 that moves forward and backward in correspondence with each die.
There are punches 17, 18, 19, and 20 provided in the dies, and a moving ram is installed in front of each die to sequentially catch the pressed material from No. 1 to No. 2 and from No. 2 to No. 3. A transfer chuck is provided to send the material to the next step for each operation.

The rolling section is provided next to the final die 16 of the heading section so as to be adjacent thereto in the same row and at the same interval, and its configuration is as follows.

The rolling bar 2 and the rack 4 are fitted and held in a guide body 24, and a mounting base 25 is moved up and down using the guide body 24 as a guide.
The crank arm 26 is interlocked with the crank arm 26 from a drive device (not shown) via an interlocking machine, and is driven to move up and down.

The press rod 23 is attached to the punch mount 22 at the same interval as the punches 17 to 20, and is elastically attached by applying a spring force to the mount 22.

When the material 1 to be rolled is a non-hollow bolt material, the push rod 23 is designed to elastically press the end of the material 1 with the tip of the push rod, and in the case of a hollow product, it is designed to fit into the hollow part. Make it so that it also serves as the core.

The rotary rolling die 3 and the rolling drive gear 6 are coaxially provided integrally.

A guide portion 2b is formed at the lower part of the rolling bar 2 by cutting the end edge into an inclined shape.

This guide part 2b allows the material to be charged smoothly at the start of rolling, and the rotary rolling die 3 at the time of charging.
Eliminate rolling errors by applying strong pressure to the
This ensures smooth rolling process.

A pedestal 27 is provided in the rolling action section S between the rolling bar 2 and the rotary rolling die 3 so as to support the rolling material 1 from below and perform rolling at a fixed position.

An extrusion rod 28 is provided which acts to push the rolled material forward when the rolling process is completed, similar to the knock-out mechanism in other die molds.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a multi-stage former equipped with the device of the present invention, Fig. 2 is an enlarged cross-sectional plan view of the rolling section, Fig. 3 is a front view of the same, and Fig. 4 is Fig. 3 A-A. 5 is a side view of a thread-rolled bolt. 1... Headed product (rolled material), 2... Rolled bar,
3...Rotary rolling die, 4...Rack, 5...
...Intermediate gear, 6...Rolled drive gear, 10...
Quill, 13-16... Dice, 17-20...
Punch, 22... Punch mounting base, 23... Push rod,
24...Guide body, 25...Mounting base.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cutting device that feeds a continuous metal material to the tip of the quill using a feeding device and cuts it into a fixed length with a movable cutter that moves across the tip of the quill; A forging section in which the cut material is sequentially fed from coarse to fine and pressed with a punch and die to form a forged product (rolled material) such as a bolt material, and a forging section located in the same line and adjacent to the forging section. A multi-stage forming machine is provided with a rolling section for supplying and rolling the formed rolling material, and the rolling section is arranged parallel to the die axis of the heading section adjacent to the rolling section. A rotary rolling die is rotatably supported, and the rotary rolling die is placed at a predetermined distance from the rotary rolling die so that it moves linearly in the vertical direction orthogonal to the axis of the rotary rolling die. one rolling bar, and a press rod provided on the punch side so as to push and supply the rolling material formed in the heading section into the rolling action section between the two when the movable ram moves forward. A rolling device for a homer, characterized in that the rotary rolling die is configured to be interlocked with the movement of the rolling bar via a rack attached to the rolling bar and an intermediate gear. (2) The rolling bar and the rotary rolling die are interlocked with a drive device such that the rolling bar and the rotary rolling die start before the front dead center of the movable ram and end their driving immediately after the front dead center. A rolling device in a homer according to scope 1. (3) In the former according to claim 1, wherein a pedestal is provided in the rolling action part between the rolling bar and the rotary rolling die so as to support the rolling material from below. Rolling equipment. (4) The rolling device for a homer according to claim 1 of the above-mentioned utility model registration, wherein the rolling bar is provided with a guide section provided at the lowermost end thereof for leading and holding at the start of rolling.