CN103978087A - Device and method for light alloy material magnetic pulse driven solid elastic medium pressure forming - Google Patents

Abstract

The invention discloses a light alloy material magnetic pulse driven solid elastic medium pressure forming device and a forming method thereof. The light alloy material magnetic pulse driven solid elastic medium pressure forming device is an upper pressing plate and a lower fixing plate facing each other. Bolt connection, a flat spiral coil is installed on the lower side of the upper pressure plate, and a copper drive plate is installed on the flat spiral coil; a spacer is installed on the upper side of the lower fixing plate. The present invention has the following technical effects: (1) The present invention combines the magnetic pulse forming and the solid elastic medium pressure forming process, fully utilizes the advantages of the two processes, improves the forming ability of the material, and aims at materials with poor formability at room temperature It can also form parts with good quality, saving production cost, and the method used is simple and easy to operate; (2) The present invention overcomes the fact that magnetic pulse forming can only produce bulging deformation and that the plate material and the mold in magnetic pulse forming collide with serious backlash. Due to the defect that the elastic cannot be molded, the invention enables the magnetic pulse high-speed forming process to carry out deep-drawing deformation, forming cylindrical parts, box-shaped parts, and complex curved surface parts.

Description

A light alloy material magnetic pulse driven solid elastic medium pressure forming device and forming method thereof

technical field

The invention belongs to the field of part forming and manufacturing, in particular to a light alloy material magnetic pulse driven solid elastic medium pressure forming device and forming method.

Background technique

Magnetic pulse forming is a high-rate forming technique that can significantly improve the formability of materials. It uses magnetic force instead of mechanical force to process metal, and has the characteristics of no lubrication, no mechanical contact, fast processing, and simple mold (single mold forming). During the magnetic pulse forming process, due to the fast forming rate, the plate often collides strongly with the mold, causing the plate to rebound, forming obvious depressions on the surface of the material, which cannot be molded. Moreover, the magnetic pulse forming process usually causes the material to bulge during forming, and the forming of deep-drawn parts cannot be realized. Solid elastic medium pressure forming is to use solid elastic medium to replace the punch or die in the traditional stamping process, and use the solid elastic medium as the force transmission medium to make the plate plastically deformed. The solid elastic medium pressure forming process has the advantages of making sheet metal forming more flexible, less die wear, higher precision and good surface of the formed parts, improving the forming performance of the sheet, and saving costs. The combination of magnetic pulse forming and solid elastic medium pressure forming will help to make full use of the advantages of both, which not only embodies the characteristics of high-speed forming but also exerts the characteristics of solid elastic medium pressure forming, so as to realize deep-drawn parts, box-shaped parts and complex profiles. High strain rate forming of parts.

Contents of the invention

The purpose of the present invention is to realize high-strain-rate forming of deep-drawn parts, box-shaped parts and parts with complex profiles of light alloy materials. The present invention proposes a magnetic pulse-driven solid elastic medium pressure forming device and its forming method.

The technical scheme of the present invention is a light alloy material magnetic pulse driven solid elastic medium pressure forming device. The upper pressing plate and the lower fixing plate are arranged facing each other, connected by bolts, a flat spiral coil is installed on the lower side of the upper pressing plate, and A copper drive plate is installed on the coil; pads are installed on the upper side of the lower fixed plate.

A light alloy material magnetic pulse driven solid elastic medium pressure forming method, the method comprises the following steps:

(1) Place the die on the block;

(2) placing the light alloy plate to be formed on the die;

(3) The solid elastic medium punch is connected to the copper drive plate and is in contact with the plate to be formed;

(4) Adjust the bolts to fix the entire forming device through the upper platen and the lower fixing plate;

(5) Turn off the discharge switch K, the capacitor C starts to discharge, and a changing current is generated in the flat spiral coil, and the copper drive plate generates an induced current, and the copper drive plate is subjected to electromagnetic force to generate high-speed motion; the solid elastic medium punch is driven by copper Driven by the plate, high-speed motion also occurs, and the light alloy plate undergoes high-speed plastic deformation under the action of the solid elastic medium punch, so that the light alloy plate and the punch are molded.

A blank holder is installed on the die by a blank holder bolt, and the plate to be formed is placed on the die (11) by the blank holder.

The present invention has the following technical effects: (1) The present invention combines the magnetic pulse forming and the solid elastic medium pressure forming process, fully utilizes the advantages of the two processes, improves the forming ability of the material, and aims at materials with poor formability at room temperature It can also form parts with good quality, saving production cost, and the method used is simple and easy to operate; (2) The present invention overcomes the fact that magnetic pulse forming can only produce bulging deformation and that the plate material and the mold in magnetic pulse forming collide with serious backlash. Due to the defect that the elastic cannot be molded, the invention enables the magnetic pulse high-speed forming process to carry out deep-drawing deformation, forming cylindrical parts, box-shaped parts, and complex curved surface parts.

Description of drawings

Fig. 1 The present invention is a schematic diagram of a light alloy plate magnetic pulse driving a solid elastic medium to form a complex curved surface part.

Fig. 2 The present invention is a schematic diagram of a light alloy plate driven by a magnetic pulse to press a solid elastic medium into a box-shaped part.

Fig. 3 The present invention is a schematic diagram of a light alloy plate driven by a magnetic pulse to press a solid elastic medium into a cylindrical part.

Fig. 4 is the circuit diagram of the flat helical coil of the present invention.

In the figure: 1-bolt, 2-nut, 3-gasket, 4-upper fixed pressure plate, 5-flat spiral coil, 6-copper drive plate, 7-solid elastic medium punch, 8-bolt, 9-binder Circle, 10-sheet material, 11-die, 12-cushion block, 13-lower fixed flange, 14-vent.

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 4, a light alloy material magnetic pulse drives a solid elastic medium pressure forming device. The upper pressing plate 4 and the lower fixing plate 13 are arranged facing each other, connected by bolts 1, and a flat plate is installed on the lower side of the upper pressing plate 4. The helical coil 5 is equipped with a copper drive plate 6 on the flat helical coil 5; a spacer 12 is installed on the upper side of the lower fixed plate 13; The discharge control switch K, resistor R, rectifier Z, and transformer P are connected in series at both ends. One end of the capacitor C is connected between the electric control switch K and the resistor R, and the other end is connected to the other end of the tube coil L. When in use, the die 11 is placed on the block 12, and the light alloy plate 10 to be formed is placed on the die 11, and the die 11 is provided with an air vent 15.

As shown in Figure 2, a light alloy material magnetic pulse drives a solid elastic medium pressure forming device. The upper pressing plate 4 and the lower fixing plate 13 are arranged facing each other, connected by bolts 1, and a flat spiral coil 5 is installed on the lower side of the upper pressing plate 4 , a copper drive plate 6 is installed on the flat spiral coil 5; a spacer 12 is installed on the upper side of the lower fixed plate 13; the capacitance of the capacitor C is 768-1152μF, the resistance R is 0.01Ω-0.06Ω, and the rectifier Z is reverse biased The voltage is 50kV/average current is not less than 3.5A, and the transformer P is 220V-8kV. When in use, the die 11 is placed on the pad 12, the die 11 is equipped with a blank holder 9 through the blank holder bolt 8, the plate 10 to be formed is placed on the die 11 through the blank holder 9, and on the die 11 Have exhaust hole 15.

As shown in Figure 3, a light alloy material magnetic pulse drives a solid elastic medium pressure forming device. The upper pressing plate 4 and the lower fixing plate 13 are arranged facing each other, connected by bolts 1, and a flat spiral coil 5 is installed on the lower side of the upper pressing plate 4. , a copper drive plate 6 is installed on the flat spiral coil 5; a spacer 12 is installed on the upper side of the lower fixed plate 13; an electromagnetic forming system 14 is connected to the flat spiral coil 5, the capacitance of the capacitor C is 768-1152 μF, and the resistance R 0.01Ω-0.06Ω, the rectifier Z has a reverse bias voltage of 50kV/average current not less than 3.5A, and the transformer P has a voltage of 220V-8kV. During use, the die 11 is placed on the spacer 12, the die 11 is equipped with a blank holder 9 by a blank holder bolt 8, and the plate 10 to be formed is placed on the die 11 by the blank holder 9.

Using the above device to perform magnetic pulse-driven solid elastic medium pressure forming of light alloy materials includes the following steps:

(1) Die 11 is placed on pad 12;

(2) placing the light alloy plate 10 to be formed on the die 11;

(3) The solid elastic medium punch 7 is connected to the copper drive plate 6 and contacts the plate 10 to be formed;

(4) Adjust the bolt 1, and fix the entire forming device through the upper platen 4 and the lower fixing plate 13;

(5) Turn off the discharge switch K, the capacitor C begins to discharge, and a changing current is generated in the flat spiral coil 5, and the copper drive plate 6 generates an induced current, and the copper drive plate 6 is subjected to electromagnetic force to generate high-speed motion; the solid elastic medium punch 7 also moves at a high speed under the drive of the copper drive plate 6, and the light alloy plate 10 undergoes high-speed plastic deformation under the action of the solid elastic medium punch 7, so that the light alloy plate 10 and the punch 7 are molded together.

Figure 1 is a schematic diagram of a light alloy plate magnetic pulse driving a solid elastic medium to form a complex curved surface part. In the figure, the solid elastic medium punch 7 is a solid elastic medium block, and the copper driving piece 6 is a copper driving frame, which is used for restraint and driving. The solid elastic medium punch 7; the switch K is closed, the capacitor C discharges instantly, the electromagnetic force acts on the copper drive piece 6, and the copper drive piece 6 drives the solid elastic medium punch 7 to move downward at high speed, and the distance between the die 11 and the plate 10 If the air cannot be removed in time, it will affect the die-attachment of the plate 11, so an air vent 14 is provided at the bottom of the die 11, and the plate 10 is plastically deformed under the action of the solid elastic medium punch 7, and finally molded with the die.

Fig. 2 is a schematic diagram of a light alloy plate driven by a magnetic pulse of a solid elastic medium to form a box-shaped part. In the figure, the solid elastic medium punch 7 and the concave mold 11 are respectively adjusted to a box shape. Because the magnetic pulse forming rate is faster, the concave mold 11 If the air between the plate 10 cannot be removed in time, it will affect the plate 11 to be molded, so an air vent 14 is provided at the bottom of the die 11 . When the switch K is closed, the capacitor C is discharged instantly, and the electromagnetic force acts on the copper drive plate 6 and drives the solid elastic medium punch 7 to move downward at high speed, and the plate 10 undergoes plastic deformation and is molded.

Fig. 3 is a schematic diagram of a light alloy plate driven by a magnetic pulse to press a solid elastic medium into a cylindrical part. In the figure, the solid elastic medium punch 7 is installed on the copper drive piece 6; when the switch K is closed, the capacitor C discharges instantly, and the electromagnetic force acts on the copper drive piece 6, and the copper drive piece 6 drives the solid elastic medium punch 7 to move downward at a high speed , the plate 10 is plastically deformed under the action of the solid elastic medium punch 7, and finally molded with the die.

Claims (3)

1. A light alloy material magnetic pulse-driven solid elastic medium pressure forming device, characterized in that: the upper platen (4) and the lower fixed plate (13) are arranged oppositely, connected by bolts (1), on the upper platen (4) A flat helical coil (5) is installed on the lower side, and a copper drive plate (6) is installed on the flat helical coil (5); a spacer (12) is installed on the upper side of the lower fixed plate (13). 2. A light alloy material magnetic pulse driven solid elastic medium pressure forming method, characterized in that: the method comprises the following steps: (1) Place the die (11) on the block (12); (2) placing the light alloy plate to be formed (10) on the die (11); (3) The solid elastic medium punch (7) is connected to the copper drive plate (6) and contacts the plate to be formed (10); (4) Adjust the bolt (1), and fix the entire forming device through the upper pressing plate (4) and the lower fixing plate (13); (5) Turn off the discharge switch K, the capacitor C begins to discharge, and a changing current is generated in the flat spiral coil (5), and the copper drive plate (6) generates an induced current, and the copper drive plate (6) is subjected to electromagnetic force to generate high-speed motion ; The solid elastic medium punch (7) also moves at high speed under the drive of the copper drive plate (6), and the light alloy plate (10) undergoes high-speed plastic deformation under the action of the solid elastic medium punch (7), so that The light alloy plate (10) is pasted with the punch (7) for molding. 3. A light alloy material magnetic pulse driven solid elastic medium pressure forming method according to claim 2, characterized in that: a blankholder ring (9) is installed on the die (11) through a blankholder bolt (8) , the plate to be formed (10) is placed on the die (11) through the blank holder (9).