High-strength steel part hot bath trimming device and use method

Abstract

A high-strength steel part hot bath trimming device and a use method. The high-strength steel part hot bath trimming device comprises a water tank; a heating temperature control component and a lower die are mounted inside the water tank; and lower trimming cutters are provided on two sides of the lower die. The high-strength steel part hot bath trimming device and the use method have the following beneficial effects: 1) integration of high-strength steel hot forming and trimming processes is achieved, and compared with a laser trimming process, the trimming efficiency is greatly improved, and the productivity is improved; 2) the die structure is simple, complex water cooling pipes are removed, and the die cost is low; the lower trimming cutters are immersed in water and are in direct contact with liquid, so that the cooling effect of cutter edges is good, and the service life is long; and 3) hot water is used as a contact cooling medium, the forming temperature can be precisely controlled by controlling the temperature of the hot water, in addition, the situation that a high-temperature plate directly comes into contact with cold water and consequently a fracture is caused is avoided, and the present invention is applicable to existing production lines.

Description

A high-strength steel part hot bath trimming device and use method Technical Field

[0001] The present invention relates to the technical field of hot trimming, and in particular to a hot bath trimming device for high-strength steel parts and a use method thereof. Background Art

[0002] Hot-formed high-strength steel components are widely used due to their excellent mechanical properties and formability. The production process for hot-formed parts is blanking, austenitization, forming and quenching, and trimming. Currently, the main cutting processes for hot-formed parts include die-cutting, thermal cutting, and laser cutting.

[0003] Due to the high strength of thermoformed parts, direct die cutting at room temperature is difficult, necessitating thermal cutting and laser cutting. Thermal cutting involves cutting after thermoforming while the sheet metal is in a pressure-holding quenching state (before it has completely cooled). Thermal cutting only allows for localized cutting, resulting in a short tool life and complex dies. While laser cutting machines can perform flexible three-dimensional cutting, they are expensive, with low cutting efficiency and high costs.

[0004] In order to solve the above-mentioned problems of low efficiency and high cost of laser cutting and large wear of the tool head of the thermal cutting process, a high-strength steel part hot bath trimming device and a method of use are needed. Summary of the Invention

[0005] Aiming at the existing problems of low efficiency and high cost of laser cutting and large wear of the tool head in thermal cutting process, the present invention proposes a hot bath trimming device for high-strength steel parts and its use method.

[0006] On the one hand, the present invention proposes a hot bath trimming device for high-strength steel parts, comprising a water tank, a heating and temperature control component and a lower mold installed inside the water tank, lower trimming knives are arranged on both sides of the lower mold, the heating and temperature control component is located on the outside of the lower trimming knife, an upper mold is arranged above the lower mold, upper trimming knives are arranged on both sides of the upper mold, and elastic parts are connected to the top of the upper mold and the bottom of the lower trimming knife. When in use, the high-temperature plate is first placed on the lower mold, and then the upper mold and the upper trimming knife are driven downward by the equipment. The upper mold first contacts the plate and presses it on the lower mold to form the plate, and then begins to compress the elastic part. As the elastic part is compressed, the upper trimming knife begins to contact the plate and cooperates with the lower trimming knife to cut the edge of the formed plate. At the same time, the plate is quenched in the water tank to harden it. The overall use effect is good and the practicality is strong.

[0007] Furthermore, the elastic member adopts a delayed nitrogen spring or an oil cylinder.

[0008] Furthermore, an elastic member installed at the bottom of the lower trimming knife passes through the bottom of the water tank and is fixed on the lower die base.

[0009] Furthermore, an elastic member installed on the top of the upper trimming knife is fixed on the upper die base.

[0010] Furthermore, the liquid in the water tank is higher than the highest position of the lower mold before mold closing, and is lower than the edge of the water tank after mold closing.

[0011] Furthermore, the liquid in the water tank is water or an aqueous solution.

[0012] Furthermore, the temperature of the liquid in the water tank is not lower than 50°. By using liquid not lower than 50°, it is possible to prevent the high-temperature plate from directly contacting cold water and causing breakage.

[0013] On the other hand, the present invention provides a method for using a high-strength steel part hot bath trimming device, comprising the above-mentioned high-strength steel part hot bath trimming device, and further comprising the following steps:

[0014] 1) After the hot-formed steel plate is austenitized at high temperature, it is moved above the lower die and immersed in the liquid in the water tank;

[0015] 2) The upper die and the upper trimming knife move downward simultaneously under the action of the equipment. The upper die first contacts the sheet and presses it onto the lower die, forming the sheet.

[0016] 3) Continue to move downward. As the elastic member is compressed, the upper trimming knife begins to contact the sheet and cooperates with the lower trimming knife to cut the edge of the formed sheet;

[0017] 4) After cutting, the formed sheet is obtained. The elastic member maintains pressure and the formed sheet is quenched in the water tank to harden it before the mold is opened.

[0018] The beneficial effects of the present invention are:

[0019] 1) This invention realizes the integration of high-strength steel hot forming and trimming processes, which greatly improves the trimming efficiency and productivity compared with the laser trimming process;

[0020] 2) In this invention, the mold structure is simple, eliminating the need for complex water cooling pipes, and the mold cost is low. The lower trimming knife is immersed in water, and the trimming knife is in direct contact with the liquid, which has a good cooling effect on the blade and a long service life.

[0021] 3) In the present invention, hot water is used as the contact cooling medium. By controlling the hot water temperature and immersion time, the forming temperature can be accurately controlled. At the same time, the high-temperature plate is prevented from directly contacting the cold water and causing fracture, which is suitable for existing production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] FIG1 is a schematic diagram of the simplified structure of the present invention.

[0024] In the figure: 1. Water tank; 2. Heating and temperature control assembly; 3. Upper mold; 4. Elastic member; 5. Upper trimming knife; 6. Lower mold; 7. Lower trimming knife. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent. Example 1

[0026] As shown in Figure 1, in this embodiment, the present invention proposes a hot bath trimming device for high-strength steel parts, including a water tank 1. The liquid in the water tank 1 is water or an aqueous solution. A heating and temperature control component 2 and a lower mold 6 are installed inside the water tank 1. The temperature of the liquid in the water tank 1 is not lower than 50°. By using a liquid not lower than 50°, it is possible to avoid the high-temperature plate from directly contacting cold water and causing fracture. Lower trimming knives 7 are provided on both sides of the lower mold 6. The liquid in the water tank 1 is higher than the highest position of the lower mold 6 before mold closing, and is lower than the edge of the water tank 1 after mold closing. The heating and temperature control component 2 is located on the outside of the lower trimming knife 7. An upper mold 3 is provided above the lower mold 6. Upper trimming knives 5 are provided on both sides of the upper mold 3. The top of the upper mold 3 and the bottom of the lower trimming knife 7 They are all connected with elastic parts 4, which adopt delayed nitrogen springs or oil cylinders. The elastic part 4 installed at the bottom of the lower trimming knife 7 passes through the bottom of the water tank 1 and is fixed on the lower die base, and the elastic part 4 installed on the top of the upper trimming knife 5 is fixed on the upper die base. When in use, the high-temperature plate is first placed on the lower die 6, and then the upper die 3 and the upper trimming knife 5 are driven downward by the equipment. The upper die 3 first contacts the plate and presses it on the lower die 6 to form the plate, and then begins to compress the elastic part 4. As the elastic part 4 is compressed, the upper trimming knife 5 begins to contact the plate and cooperates with the lower trimming knife 7 to cut the edge of the formed plate. At the same time, the plate is quenched in the water tank 1 to harden it. The overall use effect is good and the practicality is strong. Example 2

[0027] This embodiment provides a method for using a high-strength steel part hot bath trimming device, including the high-strength steel part hot bath trimming device of the first embodiment, and further comprising the following steps:

[0028] 1) After the hot-formed steel plate is austenitized at high temperature, it is moved above the lower die 6 and immersed in the liquid in the water tank 1;

[0029] 2) The upper die 3 and the upper trimming knife 5 move downward simultaneously under the action of the equipment. The upper die 3 first contacts the sheet and presses it onto the lower die 6, forming the sheet.

[0030] 3) Continuing to move downward, as the elastic member 4 is compressed, the upper trimming knife 5 begins to contact the sheet and cooperates with the lower trimming knife 7 to cut the edge of the formed sheet;

[0031] 4) After cutting, the formed sheet is obtained. The elastic member 4 maintains pressure and quenches the formed sheet in the water tank 1 to harden it before the mold is opened.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for hot bath trimming of high-strength steel parts, comprising a water tank (1), characterized in that: A heating and temperature control component (2) and a lower mold (6) are installed inside the water tank (1), lower trimming knives (7) are provided on both sides of the lower mold (6), the heating and temperature control component (2) is located outside the lower trimming knife (7), an upper mold (3) is provided above the lower mold (6), upper trimming knives (5) are provided on both sides of the upper mold (3), and elastic members (4) are connected to the top of the upper mold (3) and the bottom of the lower trimming knife (7).

2. The high-strength steel parts hot bath trimming device according to claim 1, characterized in that: The elastic member (4) adopts a delayed nitrogen spring or an oil cylinder.

3. The high-strength steel parts hot bath trimming device according to claim 1, characterized in that: The elastic member (4) installed at the bottom of the lower trimming knife (7) passes through the bottom of the water tank (1) and is fixed on the lower die base.

4. The high-strength steel parts hot bath trimming device according to claim 1, characterized in that: The elastic member (4) mounted on the top of the upper trimming knife (5) is fixed on the upper die base.

5. The high-strength steel parts hot bath trimming device according to claim 1, characterized in that: The liquid in the water tank (1) is higher than the highest position of the lower mold (6) before the mold is closed, and is lower than the edge of the water tank (1) after the mold is closed.

6. The high-strength steel parts hot bath trimming device according to claim 5, characterized in that: The liquid in the water tank (1) is water or an aqueous solution.

7. The high-strength steel parts hot bath trimming device according to claim 6, characterized in that: The temperature of the liquid in the water tank (1) is not less than 50°.

8. A method for using a hot bath trimming device for high-strength steel parts, characterized in that: The high-strength steel part hot bath trimming device according to any one of claims 1 to 7 further comprises the following steps: 1) After being austenitized at high temperature, the hot-formed steel plate is moved above the lower die (6) and immersed in the liquid in the water tank (1); 2) The upper die (3) and the upper trimming knife (5) move downward simultaneously under the action of the equipment, and the upper die (3) first contacts the plate and presses it onto the lower die (6), so that the plate is formed; 3) Continuing to move downward, as the elastic member (4) is compressed, the upper trimming knife (5) begins to contact the plate and cooperates with the lower trimming knife (7) to cut the edge of the formed plate; 4) After the cutting is completed, a formed plate is obtained, and the elastic member (4) maintains pressure, so that the formed plate is quenched in the water tank (1) to harden it and then the mold is opened.

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