JPH0957390A - Kick-out device in roll-forming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unnecessitate the change of a first projecting movement quantity even in the case of adjusting a second projecting movement quantity of a kick- out pin by driving a kick-out lever for pushing the kick-out pin and a trimming lever for pushing the cylindrical body with respectively separated cams. SOLUTION: The head part (b) of a work (a) is cut off into a hexagonal shape with a hollow trimming punch 45 and the chip (c) is pushed to the front surface of a die 47. At the same time, the trimming lever 44 is inclined frontward by rotating the trimming cam 20, and a cylindrical body 38 is pressed with a pressing part 32 at the upper end thereof. Then, the cylindrical body 38 presses a flange 34 and the kick-out pin 1 is advanced a little and the work (a) is pressed to pull off the chip (c) from the head part (b). Successively, when the trimming punch 45 is moved backward, the kick-out lever 5 is inclined frontward by rotating a kick-out cam 4, and the pin 1 is largely pushed out with a pressing bolt 14. The work (a) is kicked out through the inner part of the punch 45 and the chip (c) is dropped down from a gap between the punch 45 and the die 47.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging machine for manufacturing a work, such as a hexagonal bolt, which requires trimming of the outer peripheral portion of the head with a trimming punch.

[0002]

2. Description of the Related Art When a trimming punch such as a hexagon bolt is used to scrape the outer periphery of the head of a work with a forging machine, the kickout pin is about 10 mm while the shavings are pressed against the die by the trimming punch. Separates shavings by protruding and advancing the work piece,
Then, by ejecting the kickout pin to the front of the die and completely ejecting the work from the die,
The next work is supplied while the work remains in the die, and double punching occurs to prevent damage to the punch and the die.

However, in the conventional press machine,
Since the first ejecting motion of the kickout pin for separating the shavings from the work and the second ejecting motion for ejecting the work from the die were performed by one lever, the work depending on the length of the work Adjusting the amount of kickout pin's second ejection to eject the shavings from the die changes the amount of first ejection to separate the shavings from the work. Every time the amount of exercise was adjusted, it was necessary to adjust the amount of the first projecting exercise, which made the setup change work complicated.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is that it is not necessary to adjust the amount of the second ejecting movement of the kickout pin or to change the amount of the first ejecting movement. Is to

[0005]

As means for solving the above problems, the present invention provides a collar in the middle of a kick-out pin and slides the kick-out pin on the back side of the collar of the kick-out pin. The first body of the kick-out pin was designed so that the kick-out lever that pushes the kick-out pin and the trimming lever that pushes the barrel are driven by separate cams. The shavings are separated from the work by the ejecting motion of the workpiece and the work is ejected from the die by the second ejecting motion of the kickout pin independently.

Therefore, it is not necessary to adjust the amount of the second protrusion movement of the kickout pin or to change the amount of the first protrusion movement, and the setup change can be efficiently performed.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a driving device for a trimming motion and a kick-out motion. In the drawing, reference numeral 1 is a kick-out pin, which is fitted in a body frame 2 so as to be freely slidable in the front-rear direction.

First, the drive device for kick-out motion will be described. Reference numeral 5 is a kick-out lever supported on the main body frame 2 by a shaft 6, and is supported on the main body frame 2 by the shaft 3 by two cam followers 7, 7. By sandwiching the kicked out cam 4 that has been formed, the kicked out cam 4 is swung between the forward position shown by the solid line and the retracted position shown by the chain line in the figure by the rotation of the kick out cam 4, and the vertical direction thereof The screw rod 8 is freely supported only for rotation, and a slider 9 screwed onto the screw rod 8 is adapted to slide up and down along the front surface of the kickout lever 5 by the rotation of the screw rod 8. Roller 1 for 9
0 is supported.

Reference numeral 11 denotes an intermediate lever supported by the body frame 2 by a shaft 12, and the roller 10 is provided on the rear surface.
Is formed with a flat surface 13 on which the air cylinder 17 attached to the body frame 2 is attached.
16 that abuts the piston rod 18 that protrudes from the
And the nut 1 is screwed into the female screw 19 to freely adjust the protrusion amount.
5 is provided, and the flat surface 13 is pressed against the roller 10 of the kickout lever 5 by the elastic output of the piston rod 18.
The head of No. 4 contacts the rear end of the kickout pin 1.

Next, the drive mechanism for the trimming movement will be described. The trimming cam 20 supported by the shaft 21 on the body frame 2 is attached to the trimming cam 20 by the shaft 24.
The cam follower 23 axially supported is in contact with the lower end of the first lever 22 supported by the main lever 2, and the second lever 25 also supported by the shaft 24 is attached to the main body frame 2 by a protrusion 28 protruding from the front surface. The piston rod 27 of the air cylinder 26 abutted against the second lever 25
Is urged in the clockwise direction, and the push bolt 29 screwed into the lower end thereof and the projection 31 formed on the back surface of the first lever 22 come into contact with each other to determine the relative angle between the first lever 22 and the second lever 25, and The push bolt 29 is fixed by 30 and the trimming lever 44 is configured by the first lever 22 and the second lever 25.

At the upper end of the trimming lever 44, as shown in FIG. 2, a pressing portion 32 is formed in which a groove 33 for inserting the kickout pin 1 is cut.

FIG. 3 is an enlarged cross-sectional view of the portion where the kickout pin 1 projects from the rear end of the main body frame 2. A collar 34 is formed in the middle of the kickout pin 1 and a metal 35 is provided on the rear side thereof. The male screw cylinder 36 is slidably fitted and the female screw cylinder 37 is screwed onto the outer circumference of the male screw cylinder 36.
A cylindrical body 38 is formed by the screw cylinders 36 and 37,
The pressing portion 32 of the trimming lever 44 abuts on the rear end of the female screw cylinder 37.

A coil spring 39 is directly mounted on the front surface of the female screw cylinder 37 between the female screw cylinder 37 and the body frame 2, and a coil spring 40 is mounted via a sleeve 41 to urge the cylinder body 38 backward. The flange 43 of the female screw cylinder 37 is the main body frame 2.
It is pressed against the stepped portion 42 of the.

The kickout pin 1 is biased in the backward direction by a spring (not shown) so that the collar 34 is pressed against the male screw cylinder 36.

The cylindrical body 38 is designed so that the female screw cylinder 37 does not rotate with respect to the main body frame 2 by a pin (not shown). By rotating the male screw cylinder 36 in the forward and reverse directions, the cylindrical body 38 and the kickout pin are rotated. The abutment position of the first brim 34 is moved back and forth.

The operation of the kickout device will be described.

First, as shown in FIG. 4, the head b of the work a is moved by the hollow trimming punch 45 attached to the ram 46.
And shavings c are pressed against the front surface of the die 47 at the same time as shown in FIG.
When the trimming lever 44 is tilted forward by the rotation of 0, the pressing portion 32 at the upper end of the trimming lever 44 pushes the tubular body 38, and as shown in FIG.
The cylinder 38 pushes the collar 34 to push the kickout pin 1
Moves a little to push the work a, and the shavings c are torn from the head b.

At this time, the amount of advance of the kick-out pin 1 is determined by the amount of movement of the trimming lever 44 by the cam 20, and has a fixed stroke.

Subsequently, as shown in FIG. 6, when the trimming punch 45 is retracted together with the ram 46, the kickout lever 5 is tilted forward by the rotation of the kickout cam 4 as shown in FIG. 11 and push the kick-out pin 1 out with the push bolt 14 attached to the upper end of the kick-out pin 1 as shown in FIG.
The work a that has been trimmed is kicked out through the trimming punch 45, and the shavings c are removed from the trimming punch 45.
And falls between the dice 47.

At this time, the amount of forward movement of the kick-out pin 1 is adjusted by the vertical movement of the slider 9 caused by the rotation of the screw rod 8 of the kick-out lever 5, and the slider 9 is moved to the position shown in FIG.
As shown by the solid line, the roller 10 tilts the intermediate lever 11 largely forward when it is above the kickout pin 1.
Is largely pushed out. As shown by the chain line in the figure, when the slider 9 is downward, the amount of forward tilt of the intermediate lever 11 is small and the amount of push-out of the kickout pin 1 is also small. It is appropriately adjusted depending on the lower length.

As described above, when the movement amount of the kickout pin 1 for kicking out the work a is adjusted, the movement amount of the kickout pin 1 for trimming does not change. It can be done easily.

[Brief description of drawings]

FIG. 1 is a sectional view of a drive mechanism of a kickout pin according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged cross-sectional view showing a trimming movement of a kickout pin.

FIG. 4 is a cross-sectional view showing a state in which the head of a work is scraped off by a trimming punch.

FIG. 5 is a cross-sectional view of a state in which shavings are separated from a work.

FIG. 6 is a cross-sectional view of a state where the work is kicked out.

[Explanation of symbols]

 1: Kick-out pin 4: Kick-out cam 5: Kick-out lever 8: Screw rod 9: Slider 10: Roller 11: Intermediate lever 20: Trimming cam 34: Tsuba 38: Cylindrical body 44: Trimming lever 45: Trimming punch 47: Dice

Claims (1)

[Claims] 1. A work is loaded into a die with its head protruding, and a hollow trimming punch is used to scrape off the outer periphery of the head of the work and press the shavings against the die. In the kickout device of the forging machine, in which the work piece is separated from the shavings by slightly protruding the kickout pin, and the workout is ejected from the die by the large protrusion of the kickout pin. A kick is provided in the middle of the out pin, a cylinder body is provided on the rear side of the flange of the kick out pin so as to be slidably fitted to the kick out pin and abutting against the flange, and the kick out pin is pushed. A kickout device for a forging machine, wherein an out lever and a trimming lever for pushing the cylinder are driven by separate cams.