CN101837410A - Multipoint forming die based on solid particle medium back pressure - Google Patents

Abstract

The invention is a multi-point molding die based on the back pressure of solid particle medium, which includes a lower mold base, a push rod, a cushion block, a die, a binder plate, a cylinder, a pad iron, a support plate, bolts, an upper mold base, a convex Die, solid particle bottom mold, etc.; during mold closing and manufacturing, solid particles are filled as a flexible forming bottom mold in the cavity of the bottom mold between the die, top block and blank, as a flexible forming bottom mold. Compared with the back pressure of liquid medium, the solid particle medium back pressure is very easy to realize without special equipment. At the same time, the use of solid particles can effectively prevent leakage, does not pollute the environment, and can realize safe and reliable production. The back pressure of the solid particle medium can realize non-uniform back pressure, which can effectively improve the deformation degree of the sheet metal and make the thickness of the product evenly distributed. The solid particle bottom mold is used as a flexible bottom mold, and its shape is adjusted by the shape of the cushion block according to the needs, and the product quality is higher. The punch can be adjusted and changed according to the shape of the product, which is especially suitable for new product trial production and small and medium batch production.

Description

A Multi-point Forming Die Based on Back Pressure of Solid Particle Medium

technical field

The invention belongs to stamping die technology, and specifically relates to a multi-point forming die based on solid particle medium back pressure, mainly providing a flexible bottom die for solid particle medium back pressure and a multi-point forming die.

Background technique

During the forming process of the traditional multi-point forming rigid die drawing process, the thickness of the sheet metal is uneven and the forming quality is poor. A forming die that uses a liquid medium such as oil or water to achieve back pressure is characterized by uniform pressure distribution, but uniform pressure distribution is not conducive to the thickness control of the formed part. Once the sheet is partially thinned during the forming process, it will easily appear cracking phenomenon. In addition, during the liquid medium back pressure forming process, the sealing is difficult to solve, which is easy to cause pollution and unsafe production.

Contents of the invention

The present invention aims at the liquid medium back pressure mold of the existing mold, its sealing problem is difficult to solve and the back pressure uniform problem, provides a multi-point molding mold and method based on the back pressure of the solid particle medium, so as to realize non-uniform back pressure forming, Adjust the shape of the pad to improve the forming quality and solve the sealing problem.

The technical scheme of the present invention is as follows: a multi-point molding die based on solid particle medium back pressure, comprising a lower mold base, a ejector pin, a pad, a die, a binder plate, a cylinder, an upper die base, a punch, and a die Installed on the lower mold base, the cylinder is installed on the upper mold base, the cylinder shaft of the cylinder is in contact with the upper surface of the binder plate, the pad is placed in the die, and the gap is matched with it, and the position of the pad corresponds to the position of the punch; The rod passes through the lower mold base and contacts with the lower surface of the cushion block; it is characterized in that: the support plate is installed on the pad iron, and the pad iron is installed on the upper mold base; the bolt is arranged in the cavity of the support plate, and the punch is formed by It is composed of several bolts, and the top of each bolt is a small punch, and the punch is composed of several small punches; solid particles are set on the pad; during mold closing and manufacturing, the solid particles are filled as a flexible forming bottom mold. In the bottom mold cavity between the die, the top block and the blank, it is used as a flexible forming bottom mold.

A further feature is: the shape of the flexible bottom mold formed by the solid particles is the same as the shape of the upper surface of the spacer.

The most important feature of the present invention is the die compounded by the back pressure of the solid particle medium and the discrete punch.

The structure of the mold is simple. Compared with the back pressure of the solid particle medium and the liquid medium, the forming is very easy to realize without special equipment. At the same time, the use of solid particles can effectively prevent leakage, does not pollute the environment, and can realize safe and reliable production. The back pressure of the liquid medium is uniform, while the back pressure of the solid particle medium can realize non-uniform back pressure, which can effectively improve the deformation degree of the sheet metal and make the thickness of the product evenly distributed. The solid particle bottom mold is used as a flexible bottom mold, and its back pressure is adjusted according to the needs by the shape of the cushion block, and the product quality is higher. The punch can be adjusted and changed according to the shape of the product, which is especially suitable for new product trial production and small and medium batch production.

Description of drawings

Figure 1 is a multi-point molding die based on solid particle medium back pressure in the present invention.

In the figure: 1—lower mold base, 2—ejector, 3—block, 4—die, 5—binder, 6—cylinder, 7—horn, 8—support plate, 9—bolt, 10— Upper mold base, 11—punch, 12—solid particles, 13—bottom mold cavity, 14—blank.

Detailed ways

Referring to Fig. 1, it is a multi-point molding die based on solid particle medium back pressure according to the present invention, including a lower mold base 1, an ejector pin 2, a cushion block 3, a die 4, a binder plate 5, a cylinder 6, and a pad iron 7 , support plate 8, bolt 9, upper mold base 10, punch 11, solid particles 12 and blank 14, etc.; die 4 is installed on lower mold base 1, cylinder 6 is installed on upper mold base 10, cylinder shaft of cylinder 6 (Working end) is in contact with the upper surface of the binder plate 5. When the cylinder 6 is working, its cylinder shaft is extended or shortened, and the binder plate 5 is pushed to move accordingly to generate mold clamping pressure; the support plate 8 is installed on the pad iron 7, and the pad The iron 7 is installed on the upper mold base 10, and a cavity is provided in the support plate 8, allowing several bolts 9 to pass through the cavity; the spacer 3 is arranged in the cavity in the middle of the die 4, and fits with the clearance, The ejector rod 2 passes through the lower mold base 1 and contacts the lower surface of the cushion block 3. The ejector rod 2 pushes the cushion block 3 to move up and down in the cavity of the die 4 under the action of external force; the position of the cushion block 3 is the same as that of the punch 11 Corresponding to the position; solid particles 12 are arranged on the cushion block 3, and the solid particles 12 serve as a flexible bottom mold. During mold closing and manufacturing, the solid particles 12 are filled in the bottom mold cavity 13 between the die 4, the top block 3 and the blank 14 as a flexible forming bottom mold, and as a flexible forming bottom mold, the blank 14 is given non-uniform back pressure, facilitate its shaping. The shape of the flexible forming bottom mold formed by the solid particles 12 is determined by the shape of the pad 3, which is the same as the shape of the upper surface of the pad 3. During the forming process, the solid particles 12 are confined in the cavity 13 of the bottom mold, thereby preventing radial solid particles from splashing out. Prevent environmental pollution and achieve safe and reliable production.

A plurality of bolts 9 form a punch 11, and the punch 11 is composed of many small punches. The top of each bolt 9 is a small punch. When forming, the top of each bolt 9 is in contact with the blank. Shape, adjust the height of the top of each bolt 9, that is, adjust the length of its protruding support plate 8 to adjust the shape of the punch; that is, the punch 11 is composed of a series of small punch rods, and the upper and lower heights of each small punch rod It is adjusted by bolt 9 to form different punch end faces. The punch 11 is installed on the support plate 8 by means of bolts 9, and multiple bolts 9 realize multi-point forming.

The bottom die of the concave die is composed of solid particles 12, which always act on the sheet during the forming process, forming a back pressure. This pressure is transmitted through the spacer 3 by the air cushion.

The solid particles 12 of the present invention mainly adopt steel balls, steel balls, metal balls or other particles with suitable properties to meet the needs of molding and extrusion.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (2)

1. multipoint forming die based on solid particle medium back pressure, comprise die shoe (1), push rod (2), cushion block (3), die (4), holding pad (5), cylinder (6), upper bolster (10), punch (11), die (4) is installed on the die shoe (1), cylinder (6) is installed on the upper bolster (10), and the cylinder axis of cylinder (6) contacts with holding pad (5) upper surface, and cushion block (3) is placed in the die (4), with its matched in clearance, the position of cushion block (3) is corresponding with the position of punch (11); Push rod (2) passes die shoe (1), contacts with the lower surface of cushion block (3); It is characterized in that: gripper shoe (8) is installed on the parallels (7), and parallels (7) is installed on the upper bolster (10); Bolt (9) is arranged on the cavity of gripper shoe (8), and punch (11) is made of several bolts (9), and the top of every bolt (9) is exactly a small punch, and punch (11) is made of some small punches; On cushion block (3), be provided with solid particle (12); At matched moulds with when making, solid particle (12) is filled in the bed die die cavity (13) between die (4), jacking block (3) and the blank (14), as the flexible forming bed die.

2. the multipoint forming die based on solid particle medium back pressure according to claim 1 is characterized in that: the shape of the formed flexible forming bed die of solid particle (9) is identical with the upper surface shape of cushion block (3).