CN214814515U

CN214814515U - Male die ejection device of screw heading machine

Info

Publication number: CN214814515U
Application number: CN202121042822.8U
Authority: CN
Inventors: 李伟勤; 郁宝林; 沈宇涛
Original assignee: Zhejiang Baotuo Machinery Co Ltd
Current assignee: Zhejiang Baotuo Machinery Co Ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-11-23
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses a male die ejection device of a screw heading machine, which comprises a frame, a sliding block which moves back and forth is arranged on a guide rail of the frame, the sliding block is covered by a sliding block pressing plate which is fixed on the frame, and is characterized in that a cam plate is fixed on the sliding block pressing plate, a rocker shaft is arranged on the sliding block through two supports, a roller is arranged at one end of the rocker shaft through the rocker arm, the roller is arranged on the cam plate, the rocker shaft swings up and down along with the back and forth movement of the sliding block and the fluctuation of the shape of the cam plate, a connecting plate is fixed on the rocker shaft, a striking screw is arranged on the connecting plate, the striking screw presses a top shaft with a spherical top part at the up and down moving top, the lower end of the top shaft is provided with a first inclined plane which is matched with a second inclined plane on an ejection block, two ejector pins and screw blanks in two ejector pins are sequentially arranged at the front end of the ejection block, after the forging of the screw head is completed, when the sliding block moves backwards, the two punching die ejector pins are pushed out, and the screw blank is ejected out of the die cavity of the two punching dies.

Description

Male die ejection device of screw heading machine

Technical Field

The utility model belongs to machine part's processing equipment especially relates to screw heading machine formpiston ejecting device.

Background

The heading machine is a cold-working forming mechanical device for forging and upsetting the top end of a metal bar or wire under normal temperature conditions, such as upsetting of a screw head and the like, and is mainly used for manufacturing products such as bolts, nuts, rivets and special-shaped parts produced in large scale, and qualified products can be manufactured only by secondary forging and forming of the products. The main working process comprises the following steps: straightening wires, feeding, cutting, transferring, first punching forging forming, second punching forging forming and blanking. The main working area of the heading machine is a forging area and consists of a main die and two stamping dies, wherein the main die is fixed on a machine base, the two stamping dies are arranged on a stamping die holder capable of moving up and down, the stamping die holder is arranged on a sliding block of a crank sliding block mechanism, the sliding block is commonly called as an impact running table, so that the stamping dies realize reciprocating linear motion, and the working principle of forging and forming of the heading machine is that the stamping die which does the first reciprocating linear motion presses a wire rod into a die cavity of the main die to deform the wire rod; when the first punch die returns, the punch die seat which moves up and down moves to the limit position, and the second punch die forges and forms the head of the wire rod when the impact running table does the second reciprocating linear motion. The last blanking is that the screw semi-finished product at the front end of the last die is ejected out of male dies of two dies and then falls down for collection, the general ejection of the screw semi-finished product is ejected out by an ejection device, while the ejection device on the existing screw heading machine has a complex structure, for example, the ejection device of the die of the screw heading machine in the patent CN102000725B needs to divide a part of power on the screw heading machine to drive a linkage shaft to rotate through an umbrella-shaped tooth, a cam and a pulley above the cam are fixed on the linkage shaft, the pulley is connected with the ejection device, then a rocker arm, a pulling shaft, a linkage arm, a pulling arm, a top plate and other mechanisms are driven, and finally the screw head of the semi-finished product is ejected out of a die cavity of the two dies. Such complicated mechanisms are expensive to manufacture and cumbersome to use and adjust.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, machining efficiency are high, can be on the basis of former machine of taking the lead the screw machine of taking the lead the male mold ejecting device of making through reforming transform.

In order to achieve the above effects, the technical scheme of the utility model is that: it comprises a frame, a slide block which moves back and forth is arranged on a guide rail of the frame, the slide block is covered by a slide block pressing plate fixed on the frame, it is characterized in that a cam plate is fixed on a slide block pressing plate, a rocker shaft is arranged on the slide block through two support seats, one end of the rocker shaft is provided with a roller through a rocker, the roller is arranged on the cam plate, the rocker shaft swings up and down along with the back and forth movement of the slide block and the fluctuation of the shape of the cam plate, a connecting plate is fixed on the rocker shaft, a striking screw is arranged on the connecting plate, the striking screw presses a top shaft with a spherical top part moving up and down, the lower end of the top shaft is provided with a first inclined plane, the first inclined plane is matched with the second inclined plane on the ejection block, the front end of the ejection block is sequentially provided with two die ejector pins and a screw blank which push against two dies, and after the sliding block moves forwards to finish forging of the screw head, the two die ejector pins are pushed out when the sliding block moves backwards, and the screw blank is ejected out of the die cavity of the two die.

The first inclined plane and the second inclined plane are respectively at 45 degrees.

The ejector shaft is provided with a notch, and a limit block embedded into the notch is fixed on the sliding block beside the notch to limit the up-down stroke of the ejector shaft.

The lower end of the jacking shaft is inserted into the jacking spring so as to ensure the long-term contact between jacking of the jacking shaft and the impact screw.

The rear end of the ejection block is provided with a pressure spring.

The use method of the male die ejection device of the screw heading machine comprises the following steps: the length of the front end of the impact screw extending out of the connecting plate and the front and back positions of the cam plate are adjusted before the screw pushing device is used, so that after the sliding block completes secondary punching, when the sliding block moves backwards, the cam plate lifts the roller to drive the rocker shaft to rotate, the impact screw presses downwards to push the ejector shaft to move downwards, then the first inclined surface on the ejector shaft and the second inclined surface on the ejection block push the ejector pins of the two punching dies to move forwards, screw blanks in the two punching dies are ejected out of die cavities of the two punching dies, and the ejection action of the screw blanks is completed.

According to the male die ejection device of the screw heading machine with the structural design, the device realizes the up-and-down swing of the rocker shaft by utilizing the back-and-forth movement of the sliding block for forging the screw head in the rack through the cam plate arranged beside the sliding block and the up-and-down and back-and-forth movement of the roller on the cam plate so as to drive the impact screw and the ejection shaft, and then the ejector pin of the two dies is pushed to move forwards by the inclined plane I on the ejection shaft and the inclined plane II on the ejection block so as to eject the screw blank in the two dies from the die cavity of the two dies, thus finishing the ejection movement of the screw blank. The punch forming of the screw head and the ejection of the screw blank are completed at one time. In addition, in the use and adjustment, the extension length and the position of the two die ejector pins can be conveniently adjusted by adjusting the extension length of the impact screw on the connecting plate as long as the extension length of the impact screw is rotated. Unlike traditional screw head driving machine, the said machine needs to output partial power in the transmission case and has one complicated transmission mechanism. Meanwhile, the waste of the screw blank in the debugging process and even the damage of equipment can be reduced, and the technical requirements on operators are also reduced.

Drawings

FIG. 1 is a front view of a male die ejection device of a screw heading machine;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view of the K direction of FIG. 1;

fig. 4 is a view showing a state in which the screw material is ejected from the cavity of the two-die in the screw heading machine.

In the figure: 1. a frame; 2. a guide rail; 3. a slider; 4. a slide block pressing plate; 5. a cam plate; 6. a support; 7. a rocker shaft; 8. a rocker arm; 9. a roller; 10. a connecting plate; 11. impacting a screw; 12. a top shaft; 13. jacking up the spring; 14. a notch; 15, a limiting block; 16. a first inclined plane; 17. ejecting a block; 18. a second inclined plane; 19. a pressure spring; 20. a second die; 21. two punch ejector pins; 22. a screw blank; 23. a screw head; 24. a mold cavity; 25. and a limiting screw.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Fig. 1 to 3 are schematic structural views of a male die ejection device of a heading machine. As seen from the figure, the device comprises a frame 1, a sliding block 3 which moves forwards and backwards is arranged on a guide rail 2 of the frame 1, the sliding block 3 is covered by a sliding block pressing plate 4 fixed on the frame 1, a cam plate 5 is fixed on the sliding block pressing plate 4, a rocker arm shaft 7 is arranged on the sliding block 3 through two supports 6, one end of the rocker arm shaft 7 is provided with a roller 9 through a rocker arm 8, the roller 9 is placed on the cam plate 5, and the rocker arm shaft 7 swings up and down along with the forward and backward movement of the sliding block 3 and the undulation of the shape of the cam plate 5. A connecting plate 10 is fixed on the rocker arm shaft 7, a striking screw 11 is installed on the connecting plate 10, the striking screw 11 presses a top shaft 12 with a spherical top moving up and down, and the lower end of the top shaft 12 is inserted into a jacking spring 13 so as to ensure that the top shaft 12 jacks up and contacts with the striking screw 11 for a long time. A notch 14 is formed on the top shaft 12, and a limit block 15 embedded into the notch 14 is fixed on the slide block 3 beside the notch 14 so as to limit the up-and-down stroke of the top shaft 12. The lower end of the top shaft 12 is provided with a first inclined surface 16, and the first inclined surface 16 is matched with a second inclined surface 18 on the ejection block 17 and is respectively 45 degrees. A compression spring 19 is mounted at the rear end of the ejector block 17. The two-die ejector pin 21 and the screw blank 22 in the two-die 20 are sequentially mounted at the front end of the ejector block 17, and when the slide block 3 moves backward after the slide block 3 moves forward to finish forging of the screw head 23, the two-die ejector pin 21 is pushed out to eject the screw blank 22 from the cavity 24 of the two-die 20.

The use method of the male die ejection device of the screw heading machine comprises the following steps: the protruding length B of the front end of the impact screw 11 on the connecting plate 10 and the front and back positions of the cam plate 5 are adjusted before use and fixed by a limiting screw 25, so that after the slider 3 completes the second punching, when the slider moves backwards, the cam plate 5 lifts the roller 9 to drive the rocker arm shaft 7 to rotate, the impact screw 11 presses downwards to push the ejector shaft 12 to move downwards, then the two-die ejector pin 21 is pushed to move forwards by the first inclined surface 16 on the ejector shaft 12 and the second inclined surface 16 on the ejector block 15, the screw blank 22 in the two-die punch 20 is ejected from the die cavity 24 of the two-die 20, and the ejection action of the screw blank 22 is completed as shown in FIG. 4.

Claims

1. A male die ejection device of a screw heading machine comprises a frame, a sliding block which moves back and forth is arranged on a guide rail of the frame, the sliding block is covered by a sliding block pressing plate fixed on the frame, and the male die ejection device is characterized in that a cam plate is fixed on the sliding block pressing plate, a rocker shaft is arranged on the sliding block through two support seats, a roller is arranged at one end of the rocker shaft through a rocker arm, the roller is placed on the cam plate, the rocker shaft swings up and down along with the back and forth movement of the sliding block and the fluctuation of the shape of the cam plate, a connecting plate is fixed on the rocker shaft, a striking screw is arranged on the connecting plate, the striking screw presses a top shaft with a spherical up-down moving top, the lower end of the top shaft is provided with a first inclined surface which is matched with a second inclined surface on an ejection block, the front end of the ejection block is sequentially provided with a second die ejector pin and a screw blank which are used for ejecting two dies, when the sliding block moves back after the forging of a screw head is completed by the forward movement of the sliding block, and pushing out the two die ejector pins to eject the screw blank out of the die cavity of the two dies.

2. The male die ejection device of a heading machine as claimed in claim 1, wherein the first inclined plane and the second inclined plane are each at 45 degrees.

3. The male die ejection device of a heading machine according to claim 1, wherein the top shaft is formed with a notch, and a stopper fitted into the notch is fixed to the slider adjacent to the notch to limit the vertical stroke of the top shaft.

4. The male die ejection device of a heading machine as claimed in claim 1 wherein the lower end of the ejector shaft is inserted into a jacking spring to ensure long term contact between jacking of the ejector shaft and impacting of the screw.

5. The male die ejection device of the heading machine according to claim 1, wherein a compression spring is mounted at a rear end of the ejection block.