CN201625727U - Variable shape punch forming die with controllable drawbead plus radial thrust - Google Patents

Abstract

The utility model relates to a variable-shape punch forming mold with controllable drawbeads and radial thrust, comprising a die, forming solid particles, drawbeads, blank holders, compression cylinders, backing plates and lower dies Seat, ejector rod, briquetting block, ejector cylinder, top plate, radial solid particles, sealing plate, billet, etc.; the ejector cylinder is installed on the lower mold base, and the working end of the ejector cylinder penetrates the ejector plate, and is set on the press The top plate in the edge ring is in contact with the lower surface of the top plate; the sealing plate is installed on the blank holder, and the sealing plate forms a radial closed space with the die, blank holder, top plate and blank during the forming process, and the radial solid The particles are arranged in radially enclosed spaces. This patent is a new type of mold that combines movable drawbeads, solid particle punches, and radial thrust with solid particle media. The drawbead resistance of this mold is easy to control, the loading of radial thrust and the forming of the solid particle punch are safe, reliable, and pollution-free, the forming is easier in actual production, and the forming quality of the product is significantly improved.

Description

Variable shape punch forming die with controllable drawbead plus radial thrust

technical field

The utility model belongs to stamping die technology, in particular to a variable-shape punch forming die with controllable drawbeads plus radial thrust, mainly aimed at changing the height of drawbeads, providing radial thrust, and changing the shape of the punch mold.

technical background

Ordinary forming dies have no radial thrust, and the forming is completed by the punch driving the sheet and pulling it toward the die. For drawing dies with radial hydraulic pressure, the radial thrust is realized by liquid pressure, and the sealing problem is difficult to solve; at the same time, the drawing dies with hydraulic devices have a more complicated structure and higher cost.

Ordinary molds are made of steel molds, and the shape of the punch does not change 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 the hydraulic deep drawing die cannot be solved, there are potential safety hazards, and it is easy to pollute the working environment.

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 problems that the existing mold cannot change the resistance of the variable drawbead, the ordinary forming mold has no radial thrust, the shape of the punch is not changeable, and the sealing problem of the hydraulic drawing mold is difficult to solve. The mold with variable solid particles can realize variable drawbead resistance, variable punch shape, provide radial thrust, and solve sealing problems.

The technical scheme of the utility model is as follows: a variable shape punch forming mold with controllable drawbeads and radial thrust, including a die, forming solid particles, drawbeads, blank holders, and compression cylinders, Backing plate, lower mold base, ejector rod, briquetting block, ejector cylinder, top plate, radial solid particles, sealing plate, billet, etc. The die is installed on the inner slider, the pressing block is installed on the lower mold base, the compression cylinder is installed on the lower mold base, and the working end of the compression cylinder withstands the blank holder; the characteristic is that the jacking cylinder is installed on the lower mold base , the working end of the jacking cylinder penetrates the binder plate, contacts the top plate set in the blank holder, and withstands the lower surface of the top plate; the sealing plate is installed on the blank holder, and the sealing plate is connected with the die, blank holder, The top plate and the blank form a radially closed space during the forming process, and radial solid particles are arranged in the radially closed space.

Another feature is: it is also provided with a forming closed space formed by the briquetting block, the blank, and the blank holder during the forming process, and the formed solid particles are arranged in the forming closed space as a punch.

A further feature is: at least one drawbead and a backing plate are provided, the upper end of the drawbead passes through the binder plate, and the lower end contacts the upper end of the ejector rod through the backing plate.

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

The radial closed spaces are uniformly distributed in the blank holder.

The most important improvement of the utility model is that the patent is a new type of mold that combines the movable drawbead, the solid particle punch, and the radial direction with the solid particle medium to increase the thrust.

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 structure of the mold is simple, and the radial thrust is transmitted to the plate by the jacking cylinder through the solid particle medium, which is reliable and pollution-free. The mold structure can also be realized by pressing the cylinder, and the radial thrust can be realized by the air cushion of the machine tool. Compared with ordinary forming molds, the forming is easier and the effect is remarkable.

The punch of the utility model is composed of formed solid particles in the forming closed space, the shape of the punch is changeable and the force is uniform during the drawing process, which is very practical. It is safe and reliable in actual production and is very effective in improving product quality. At the same time, only solid particles are worn by the punch during use, which prolongs the service life of the mold and reduces production costs.

Description of drawings

Fig. 1 is the variable shape punch forming die with controllable drawbead plus radial thrust of the utility model.

In the figure: 1-concave die, 2-shaped solid particles, 3-drawing bead, 4-binder ring, 5-pressing cylinder, 6-backing plate, 7-lower die seat, 8-ejector pin, 9- Briquetting block, 10-top material cylinder, 11-top plate, 12-radial solid particles, 13-sealing plate, 14-blank, 15-forming closed space, 16-radial closed space.

Detailed ways

Referring to Fig. 1, it shows a variable-shape punch forming die with controllable drawbead plus radial thrust of the utility model, including a die 1, forming solid particles 2, drawbead 3, and blank holder 4 , compression cylinder 5, backing plate 6, lower mold base 7, ejector rod 8, briquetting block 9, ejector cylinder 10, top plate 11, radial solid particles 12, sealing plate 13, blank 14, etc.; die 1 is installed on On the inner slider (not shown in the figure), it can move, and the blank 14 is molded in the cavity in the die 1; The upper end of the briquetting block 9 is arranged in the hole of the blank holder 4 , and the blank holder 4 moves up and down relative to the briquetting block 9 . The pressing cylinder 5 and the jacking cylinder 10 are also installed on the lower mold base 7, and the working end of the pressing cylinder 5 is in contact with the lower surface of the blank holder 4 to withstand the lower surface of the blank holder 4; The pressing force required by the edge ring 4. The working end of the jacking cylinder 10 passes through the blank holder 4, contacts with the lower surface of the top plate 11 arranged in the counterbore of the blank holder 4, and withstands the lower surface of the top plate 11. When the jacking cylinder 10 works, it pushes the top plate 11 up. , Down exercise.

Shaped solid particles 2 are arranged at the upper end of the compact 9 . During the forming process, a forming closed space 15 is formed between the upper end of the briquetting block 9, the blank 14, and the blank holder 4, and the formed solid particles 2 are filled in the forming closed space 15, and the formed solid particles 2 are used as a punch, and the die 1 corresponding to the cavity. Before closing the mold, the formed solid particles 2 are in the hole of the blank holder 4 and on the upper surface of the pressing block 9; during the drawing process, the die 1 moves downward, driving the blank holder 4 to move downward, and the formed solid particles 2 follow the The briquetting block 9 is ejected from the hole of the blank holder 4, and fills the forming closed space 15. The formed solid particles 2 in the formed closed space 15 act on the blank 14 as a punch, and the blank 14 is formed between the concave mold 1 and the formed solid particles. Forming between 2 to complete the forming process.

The sealing plate 13 is installed on the blank holder 4, and the sealing plate 13, the die 1, the blank holder 4, the top plate 11 and the blank 14 can form a radial closed space 16 during the forming process, and the radial solid particles 12 are filled in the radial direction. Into the closed space 16 (the radial solid particles 12 are in the counterbore of the blank holder 4 when they are not formed, and when the ejector cylinder 10 rises, they are pushed out by the top plate 11 and fill the closed space 16), thereby preventing the radial solid particles from 12 splashes out, and the radial solid particles 12 can provide a radial thrust at the same time, and the blank 14 is subjected to the radial thrust of the radial solid particles 12 during the forming process; the radial closed space formed in the blank holder 4 in the figure 16 are evenly distributed on the blank holder 4, so that the radial thrust generated by the radial solid particles 12 is equal. Under the action of the jacking cylinder 10, the top plate 11 pushes the radial solid particles 12 in the radial closed space 16 to move up and down synchronously, and adjusts the amount of the radial solid particles 12 flowing out of the binder ring 4 (the diameter flowing out from the binder ring 4 to the amount of solid particles 12). Fix all the ejector cylinders 10 on the lower mold base 7 to ensure that the radial solid particles 12 in the radial closed space 16 move up and down synchronously, ensure that the number of radial solid particles 12 flowing out of the blank holder 4 is equal, and enhance its operation Stability; ensure equal radial thrust provided.

As shown in the figure, the utility model mold is also provided with at least one independent drawbead 3, the upper end of the drawbead 3 passes through the blank holder 4, the lower end is set on the backing plate 6, and the upper end surface of the ejector rod 8 is in contact with the backing plate 6 . The push rod 8 moves up and down by pushing the backing plate 6, thereby pushing the drawbead 3 to move up and down synchronously, and adjusts the height of the drawbead 3 exposed to the blank holder 4 (the height passing upward from the blank holder 4). The pressing cylinder 5 jacks up upwards to provide the required pressing force of the blank holder 4 . Connect the ejector rod 8 with the air cushion, and use the function of the air cushion of the machine tool to adjust the force provided by the ejector rod 8, so that the resistance of the drawbead changes with the change of the punching stroke. The drawbeads 3 in the figure are evenly distributed around the punch of the formed solid particle 2, so that the resistance produced by the uniformly distributed drawbeads 3 is equal; The extension rib 3 moves up and down synchronously, and its height remains the same, which enhances its running stability.

The shaped solid particles 2 and the radial solid particles 12 of the utility model mainly use steel balls, steel balls, metal balls or other particles with suitable properties to meet the needs of forming and extrusion.

Claims (4)

1. forming die with shape-variable male die with controlled brake beads and radial thrust, comprise die (1), blank holder (4), clamping cylinder (5), die shoe (7), push rod (8), liftout cylinder (10), blank (14), blank holder (4) is arranged on below the die (1), blank (14) moulding in the die cavity of die (1); Clamping cylinder (5) is installed on the die shoe (7), and the working end of clamping cylinder (5) contacts with the lower surface of blank holder (4); It is characterized in that: go up at die shoe (7) liftout cylinder (10) is installed, the working end of liftout cylinder (10) penetrates blank holder (4), contact with the top board (11) in being arranged on blank holder (4), withstand the lower surface of top board (11), sealing plate (13) is installed in above the blank holder (4), and radial solid particle (12) is set on top board (11); In forming process, sealing plate (13) forms a radial-sealing space (16) with die (1), blank holder (4), top board (11) and blank (14) in forming process, and described radial solid particle (12) is full of radial-sealing space (16);

Briquetting (9) lower end is installed on the die shoe (7), and briquetting (9) upper end is arranged in the hole of blank holder (4), and blank holder (4) moves up and down with respect to briquetting (9), and briquetting (9) is provided with shaping solid particle (2); In forming process, form a shaping enclosure space (15) between briquetting (9) upper end, blank (14), the blank holder (4), shaping solid particle (2) is full of shaping enclosure space (15), shaping solid particle (2) in shaping enclosure space (15) is as punch, and is corresponding with the die cavity of die (1).

2. the forming die with shape-variable male die with controlled brake beads and radial thrust according to claim 1, it is characterized in that: be provided with at least one bead (3) and backing plate (6), blank holder (4) is passed in bead (3) upper end, the lower end is arranged on the backing plate (6), and push rod (8) upper end contacts with backing plate (6); Push rod (8) is upwards passed by die shoe (7) bottom, drives the upper and lower motion of bead (3) by backing plate (6).

3. want 2 described forming die with shape-variable male die with controlled brake beads and radial thrust according to right, it is characterized in that: described bead (3) is distributed on around shaping solid particle (2) punch; The backing plate (6) of bead (3) lower end links into an integrated entity.

4. want 1 described forming die with shape-variable male die with controlled brake beads and radial thrust according to right, it is characterized in that: described radial-sealing space (16) is distributed in the blank holder (4).

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