CN201664731U - Solid Particle Punch Forming Die with Movable Drawbeads - Google Patents

Abstract

The utility model relates to a solid particle punch forming mold with movable drawbeads, comprising a die, solid particles, drawbeads, blank holders, briquetting blocks, nitrogen cylinders, backing plates, lower mold seats, blanks, ejector rods, closed space, etc.; the blank holder (5) is arranged under the die (1), and the blank (2) is formed in the cavity of the die (1); the nitrogen cylinder (7) is installed on the lower mold base (9), and its The working end is connected with the blank holder (5); it is characterized in that: the lower end of the press block (6) is installed on the lower mold base (7), the upper end of the press block (6) is arranged in the hole of the press ring (5), and the press block (6) The upper end corresponds to the cavity of the die (1), and the blank holder (5) moves up and down relative to the briquetting block (6); above the briquetting block (6), solid particles (3) are provided; the Between the briquetting block (6), blank (2) and blankholder (5), a closed space (11) is formed during the forming process, and the solid particles (3) fill the closed space (11) as punch and The die cavity of die (1) corresponds. Forming is easier in actual production, and the quality of product forming is significantly improved.

Description

Solid Particle Punch Forming Die with Movable Drawbeads

technical field

The utility model belongs to stamping die technology, in particular to a solid particle punch forming die with movable drawbeads, and is mainly aimed at a mold with variable drawbead height and variable punch shape.

technical background

The current stamping die, the ordinary die is made of steel die, and the shape of the punch is unchanged during the drawing process. This kind of mold is prone to uneven stress and cracking during the deep drawing process, and the mold is prone to wear and tear, which reduces the service life of the mold and increases production costs. The sealing problem of hydraulic deep drawing die is difficult to solve.

In the current stamping die, the ribs of the drawbead are usually fixed on the binder plate or the die, and the resistance of the drawbead is fixed throughout the drawing forming process. However, for the drawing forming that requires the resistance of the drawbead to change along with the stamping stroke, this fixed form cannot be realized. At the same time, this way of fixing the drawbead on the binder plate or die is not convenient for mold repair, and sometimes it may cause the binder plate or die to be scrapped because the drawbead cannot be repaired, which increases the mold The mold repair time is reduced, the service life of the mold is reduced, and the production cost is increased. For example, the die structure disclosed in the invention patent titled "a mold with variable drawbead resistance" and application number 200910103593.3 filed by the applicant on April 13, 2009 is provided with independent drawbeads and drawbeads. The drawbead backing plate, the drawbead passes through the die, and the lower end contacts the upper end of the ejector rod through the drawbead backing plate. The utility model separates the drawbead from the die or the binder plate, and the push rod pushes the drawbeam backing plate to move, and its resistance can be freely adjusted by the air cushion through the push rod, and changes with the change of the stamping stroke, so that The height of the rib can be adjusted freely.

Contents of the invention

The utility model aims at the problem that the existing mold cannot change the resistance of the variable drawbead and the shape of the punch cannot be changed during the forming process, and the force is uneven, and provides a mold with variable drawbead height and variable solid particle amount, thereby Realize the problems of variable drawbead resistance, variable punch shape, uniform force, and at the same time prolong the service life of the mold and solve the sealing problem.

The technical scheme of the utility model is as follows: the solid particle punch molding die with movable drawbeads comprises a die, drawbeads, blankholders, nitrogen cylinders, backing plates, lower mold bases, and ejector pins; the blankholders are set Under the die, the blank is formed in the cavity of the die; the nitrogen cylinder is installed on the lower die base, and its working end is connected with the blank holder; In the hole of the blank holder, the upper end of the press block corresponds to the cavity of the die, and the blank holder moves up and down relative to the press block; solid particles are arranged on the press block; During the forming process, a closed space is formed, and the solid particles fill the closed space, which corresponds to the cavity of the male mold and the concave mold.

A further feature is that: at least one drawbead and a backing plate are provided, the ejector rod passes upwards from the bottom of the lower mold base, and the upper end of the ejector rod is in contact with the backing plate; the upper end of the drawbead passes through the blank holder, and the lower end is set on the On the backing plate, the ejector rod drives the drawbead to move up and down through the backing plate.

The drawbeads are evenly distributed around the solid particle punch; the backing plate at the lower end of the drawbeads is connected as a whole.

The most important improvement of the utility model is a new type of mold that combines the structure of the movable drawbead with the structure of the variable-shape punch made of solid particles.

The utility model has larger adjustment amount to the resistance of the drawbead and is more convenient, and the actual production is very effective for improving the product quality. At the same time, the mold is easy to maintain, can reduce mold repair time, prolong the service life of the mold, and reduce production costs.

The punch of the utility model is composed of formed solid particles in the forming closed space. The shape of the punch is variable during the drawing process, the force is uniform, safe, reliable, and pollution-free. It is very effective for improving product quality in actual production. . At the same time, only the solid particles are worn by the punch during use. Adding or replacing solid particles in a timely manner prolongs the service life of the mold and reduces the production cost.

Description of drawings

Fig. 1 is the solid particle punch molding die with movable drawbead of the present invention.

In the figure: 1-die, 2-blank, 3-solid particle, 4-drawing bead, 5-binder ring, 6-briquetting block, 7-nitrogen cylinder, 8-backing plate, 9-lower mold seat, 10-Jump, 11-Enclosed space

Detailed ways

Referring to Fig. 1, it is shown that the utility model has the solid particle punch molding die with movable drawbead, die 1, blank 2, solid particle 3, drawbead 4, blank holder 5, briquetting block 6, nitrogen cylinder 7. Backing plate 8, lower mold base 9, ejector pin 10, etc.; die 1 is installed on the inner slider (not shown in the figure), and blank 2 is formed in the cavity in die 1; blankholder 5 It is arranged under the die 1, and the pressing block 6 is arranged in the hole of the blank holder 5, and the blank holder 5 moves up and down relative to the pressing block 6; 1 corresponding to the cavity; solid particles 3 are provided at the upper end of the briquetting block 6 . During the forming process, the upper end of the briquette 6, the blank 2, and the blank holder 5 form a closed space 11, and the solid particles 3 are filled in the closed space 11, and the solid particles 3 serve as a punch corresponding to the cavity of the die 1. Before closing the mold, the solid particles 3 are on the upper surface of the pressure block 6 in the hole of the blank holder 5 . During the deep drawing process, the die 1 moves downward, driving the blank holder 5 to move downward, and the solid particles 3 are ejected from the hole of the blank holder 5 along with the pressing block 6, filling the closed space 11, and the solid particles 3 act as a punch On the blank 2, the blank 2 is formed between the die 1 and the solid particles 3 to complete the forming process. The solid particle 3 of the utility model is selected from steel balls, steel balls or other metal or plastic particles of suitable size, has suitable strength and rigidity, and can meet the needs of the utility model.

As shown in the figure, the utility model mold is also provided with at least one independent drawbead 4, the upper end of the drawbead 4 passes through the blank holder 5, the lower end is arranged on the backing plate 8, and the upper end surface of the ejector rod 10 is in contact with the backing plate 8 . The push rod 10 pushes the backing plate 8 to move up and down, and the backing plate 8 pushes the drawbead 4 to move up and down synchronously, and adjusts the height of the drawbead 4 exposed to the blank holder 5 (the height pierced upwards from the blank holder 5). The nitrogen cylinder 7 is set on the lower mold base 9, the working end (cylinder shaft end) of the nitrogen cylinder 7 is pushed against the lower end surface of the blank holder 5, and the cylinder 7 protrudes upwards to provide the binder required by the blank holder 5 Force; Cylinder 7 is two, symmetrically distributed. Connect the ejector rod 10 with the air cushion of the machine tool, and use the function of the air cushion of the machine tool to adjust the force provided by the ejector rod 10, so that the resistance of the drawbead changes with the change of the punching stroke. The drawbeads 4 in the figure are evenly distributed around the punch of the solid particle 3, so that the resistance generated by the uniformly distributed drawbeads 4 is equal; the backing plate 8 at the lower end of the drawbeads 4 is connected into one body to ensure uniform drawing Rib 4 moves up and down synchronously, and its height remains the same, enhancing its running stability.

Claims (3)

1. Solid particle punch forming mold with movable drawbead, including die (1), drawbead (4), blank holder (5), nitrogen cylinder (7), lower mold base (9), top The rod (10); the blank holder (5) is arranged under the die (1), and the blank (2) is formed in the cavity of the die (1); the nitrogen cylinder (7) is installed on the lower mold base (9), Its working end is connected with the blank holder ring (5); it is characterized in that: the lower end of the pressing block (6) is installed on the lower mold base (7), and the upper end of the pressing block (6) is arranged in the hole of the blank holder ring (5). The upper end of the block (6) corresponds to the cavity of the die (1), and the blank holder (5) moves up and down relative to the briquetting block (6); solid particles (3) are arranged on the briquetting block (6); A closed space (11) is formed between the briquetting block (6), the blank (2) and the blank holder (5) during the forming process, and the solid particles (3) fill the closed space (11) as a punch Corresponding to the cavity of the die (1). 2. The solid particle punch molding die with movable drawbead according to claim 1, is characterized in that: at least one drawbead (4) and backing plate (8) are provided, and the ejector pin (10) is formed by The bottom of the mold base (9) passes upwards, and the upper end of the ejector rod (10) is in contact with the backing plate (8); the upper end of the drawbead (4) passes through the blank holder (5), and the lower end is set on the backing plate (8) On, the push rod (10) drives the drawbead (4) to move up and down through the backing plate (8). 3. according to claim 2, the solid particle punch molding die with movable drawbeam is characterized in that: described drawbead (4) is to be evenly distributed around the solid particle (3) punch; The backing plate (8) at the lower end of the rib (4) is connected as a whole.

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