Hot stamping die for automobile parts

Abstract

The invention discloses a hot stamping die for automobile parts, and relates to the technical field of automobile parts processing, including a work platform and a pressure-compensating die assembly, wherein the surface of the work platform is provided with a pressure-compensating die assembly, and transmission cylinders are connected to the two sides of the pressure-compensating box. In the hot stamping die for automobile parts, the lower die and the upper die cooperate to form a steel plate by hot stamping, and at this time, the extended pressing plate descends to push the lifting piston rod to press it into the transmission cylinder, so that the transmission medium inside the transmission cylinder enters the interior of the transmission cylinder through the opening at the bottom of the pressure-compensating cylinder, and each transmission piston rod is pushed up from the bottom thereof, so that each lower die core is closely attached to the lower surface of the steel plate and is pressed upward, thereby cooperating with the downward pressure of the upper die to strengthen the stamping strength of the steel plate, thereby reducing the possibility of the steel plate rebounding, and since the lower die core is modularly arranged, it can evenly apply upward pressure to each part of the complex automobile parts when forming them.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a hot stamping die for automobile parts. Background Art

[0002] Hot stamping, also known as hot stamping, is a metal forming process that uses a die to stamp metal sheets at high temperatures. This process usually uses high-strength steel plates, such as boron steel or martensitic steel. These steels have good plasticity at high temperatures and obtain extremely high strength and hardness after cooling. Therefore, they are widely used in the manufacturing of various automotive parts.

[0003] In the existing hot stamping of automotive parts, a space larger than the designed size is often reserved to take into account the problem of material springback. The specific size of the space is adjusted according to the material springback characteristics. Therefore, it is necessary to understand the characteristics of each material to be processed and calculate the corresponding anti-rebound space size, which leads to a heavy burden of preliminary preparation work. In addition, in the actual operation, the material springback often does not match the preset situation due to factors such as temperature changes, resulting in the material not meeting the standards after hot stamping.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a hot stamping die for automobile parts is proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a hot stamping die for automobile parts, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hot stamping die for automotive parts, comprising a working platform and a pressure-compensating die assembly, the surface of the working platform is provided with a pressure-compensating die assembly, the pressure-compensating die assembly comprises a lower die, a core hole, a lower die core, a pressure-compensating box, a baffle, a pressure-compensating cylinder, a transmission piston rod, a spring, a transmission cylinder, a lifting piston rod, an upper die, an electric push rod, and an extended pressing plate, a core hole is opened at the bottom of the inner wall of the lower die, and the lower die core is penetrated inside the core hole, a pressure-compensating box is connected to the bottom of the working platform, and a baffle is fixed to the lower part of the inner wall of the pressure-compensating box, a pressure-compensating cylinder is penetrated inside the baffle, and a transmission piston rod is penetrated at the top of the pressure-compensating cylinder, a spring is sleeved on the outer wall of the transmission piston rod, transmission cylinders are connected to both sides of the pressure-compensating box, and a lifting piston rod is penetrated at the top of the transmission cylinder, an upper die is provided directly above the lower die, and electric push rods are fixed on both sides of the upper die, and an extended pressing plate is fixed at the bottom of the electric push rod.

[0007] Furthermore, the outer opening structural dimensions of the lower mold core are matched with the inner opening structural dimensions of the core hole, and the bottom of the lower mold core is fixedly connected to the top of the transmission piston rod.

[0008] Furthermore, the lower mold core and the transmission piston rod are elastically connected to the pressure-compensating cylinder via a spring, and the outer port structure size of the bottom end of the transmission piston rod is matched with the inner port structure size of the pressure-compensating cylinder.

[0009] Furthermore, the pressure boosting cylinder is connected to the space below the internal baffle of the pressure boosting box through an opening at the bottom thereof, and the pressure boosting cylinder is connected to the transmission cylinder through the pressure boosting box.

[0010] Furthermore, the lifting piston rod is located on both sides of the lower mold after passing through the working platform, and the top height of the lifting piston rod is not higher than the top surface height of the lower mold.

[0011] Furthermore, the extended pressing plate is sleeved on the outer wall of the upper mold, and the lower surfaces on both sides of the extended pressing plate are located directly above the lifting piston rod.

[0012] Furthermore, the outer shape structure of the lower die core is compatible with the outer shape structure of the automobile parts after hot stamping, and the lower die core is modularly arranged.

[0013] Furthermore, support columns are fixed around the surface of the working platform, and a placement plate is fixed on the top of the support columns.

[0014] Furthermore, a hydraulic push rod is fixed to the middle of the placement plate, and the bottom end of the hydraulic push rod is fixedly connected to the top surface of the upper mold.

[0015] Furthermore, guide columns are passed through the four sides of the upper mold and the lower mold, and the bottoms of the guide columns are fixedly connected to the surface of the working platform.

[0016] The present invention provides a hot stamping die for automobile parts, which has the following beneficial effects:

[0017] 1. The hot stamping die for automobile parts, the lower die and the upper die cooperate to form the steel plate by hot stamping, and at this time, the extended pressure plate descends to push the lifting piston rod to press it into the transmission cylinder, so that the transmission medium inside the transmission cylinder enters the interior through the opening at the bottom of the pressure compensation cylinder, and pushes up from the bottom of each transmission piston rod, so that each lower die core is tightly attached to the lower surface of the steel plate and presses it upward, thereby cooperating with the downward pressure of the upper die to strengthen the stamping strength of the steel plate, thereby reducing the possibility of the steel plate's rebound, and because the lower die core is modularly set, it can evenly apply upward pressure to all parts of complex automobile parts when forming them.

[0018] 2. For the hot stamping die for automobile parts, at the end of hot stamping, the upper die slides up along the outer wall of the guide column and separates from the lower die. At this time, the extended pressure plate is lifted accordingly, causing the lifting piston rod to lift up and reset. At this time, the liquid level of the transmission medium inside the pressure-compensating cylinder drops, and at the same time, the top of the lower die core loses force, causing the spring to stretch and reset. At this time, the lower die core carries the formed automobile parts up and out of the lower die, thereby facilitating the removal of the formed automobile parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a hot stamping die for automobile parts of the present invention;

[0020] Figure 2 This is a schematic diagram of the extended pressing plate structure of a hot stamping die for automobile parts of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of a lower die of a hot stamping die for automobile parts of the present invention;

[0022] Figure 4 This is a schematic diagram of the lower die structure of a hot stamping die for automobile parts of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a transmission piston rod of a hot stamping die for automobile parts of the present invention;

[0024] Figure 6 The present invention is a schematic diagram of the bottom structure of a pressure-compensating cylinder of a hot stamping die for automobile parts.

[0025] In the figure: 1. working platform; 2. supplementary pressure mold assembly; 201. lower mold; 202. core hole; 203. lower mold core; 204. supplementary pressure box; 205. baffle; 206. supplementary pressure cylinder; 207. transmission piston rod; 208. spring; 209. transmission cylinder; 210. lifting piston rod; 211. upper mold; 212. electric push rod; 213. extension pressure plate; 3. support column; 4. placement plate; 5. hydraulic push rod; 6. guide column. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] like Figure 1-Figure 6As shown, the present invention provides a technical solution: a hot stamping die for automobile parts, including a working platform 1 and a pressure-compensating die assembly 2, the surface of the working platform 1 is provided with the pressure-compensating die assembly 2, the pressure-compensating die assembly 2 includes a lower die 201, a core hole 202, a lower die core 203, a pressure-compensating box 204, a baffle 205, a pressure-compensating cylinder 206, a transmission piston rod 207, a spring 208, a transmission cylinder 209, a lifting piston rod 210, an upper die 211, an electric push rod 212, and an expansion plate 213, the bottom of the inner wall of the lower die 201 is provided with a core hole 202, and the core The inside of the hole 202 is penetrated with a lower mold core 203, the bottom of the working platform 1 is connected to a pressure compensation box 204, and a baffle 205 is fixed to the lower part of the inner wall of the pressure compensation box 204, a pressure compensation cylinder 206 is penetrated inside the baffle 205, and a transmission piston rod 207 is penetrated on the top of the pressure compensation cylinder 206, and a spring 208 is sleeved on the outer wall of the transmission piston rod 207, and transmission cylinders 209 are connected to both sides of the pressure compensation box 204, and a lifting piston rod 210 is penetrated on the top of the transmission cylinder 209, and an upper mold 211 is arranged just above the lower mold 201, and both sides of the upper mold 211 are fixed. The electric push rod 212 is fixed, and the bottom of the electric push rod 212 is fixed with an expansion pressure plate 213, the outer opening structure size of the lower mold core 203 is adapted to the inner opening structure size of the core hole 202, and the bottom of the lower mold core 203 is fixedly connected to the top of the transmission piston rod 207, the lower mold core 203 and the transmission piston rod 207 are elastically connected to the pressure compensation cylinder 206 through the spring 208, and the outer opening structure size of the bottom end of the transmission piston rod 207 is adapted to the inner opening structure size of the pressure compensation cylinder 206, and the pressure compensation cylinder 206 is connected to the inner baffle 205 of the pressure compensation box 204 through the opening at the bottom thereof. The lower space is connected, and the pressure-compensating cylinder 206 is connected to the transmission cylinder 209 through the pressure-compensating box 204. The lifting piston rod 210 is located on both sides of the lower mold 201 after passing through the working platform 1, and the top height of the lifting piston rod 210 is not higher than the top surface height of the lower mold 201. The expansion plate 213 is sleeved on the outer wall of the upper mold 211, and the lower surfaces of the two sides of the expansion plate 213 are located directly above the lifting piston rod 210. The outer shape structure of the lower mold core 203 is compatible with the outer shape structure of the automobile parts after hot stamping, and the lower mold core 203 is modularly arranged;

[0028] The specific operation is as follows: first, the lower die core 203 is manufactured as a whole according to the structural dimensions of the formed automobile parts, and the lower die core 203 is divided according to its overall structure to make it modularly designed, and the specific shape structure of the lower die core 203 is adapted according to the structure of the automobile parts and is not limited. The lower die core 203 in the figure is a block-shaped structure only for illustration, and each lower die core 203 is located inside the lower die 201 and has elasticity through the transmission piston rod 207 and the spring 208 and can be lifted and lowered along the core hole 202. After heating, the steel plate to be stamped is placed inside the lower die 201 and supported by each lower die core 203 to ensure that the steel plate is placed stably and avoids skewing, so as to ensure that the steel plate is evenly stressed during stamping;

[0029] Then the hydraulic push rod 5 extends to push the upper mold 211 down and press it into the lower mold 201. At this time, the lower mold core 203 is forced to carry the transmission piston rod 207 down and compress the spring 208. When the lower mold core 203 drops to the limit, it cooperates with the lower mold 201 and the upper mold 211 to make the steel plate hot stamped. At this time, the electric push rod 212 extends to push the expansion plate 213 down. The expansion plate 213 goes down and pushes the lifting piston rod 210 to press it into the transmission cylinder 209, so that the transmission medium such as oil in the transmission cylinder 209 enters the pressure compensation box 204, and the transmission medium passes through the pressure compensation cylinder 20 6, and enter the interior thereof, thereby pushing up each transmission piston rod 207 from the bottom thereof, so that each lower die core 203 is closely attached to the lower surface of the steel plate and is pressed upward, thereby cooperating with the downward pressure of the upper die 211 to strengthen the punching force on the steel plate, thereby reducing the possibility of the steel plate's rebound. Since the lower die core 203 is modularly arranged, it can evenly apply upward pressure to each part of the complex automobile parts when forming them. When the lifting piston rod 210 is not pressed downward, the liquid level of the transmission medium in the transmission cylinder 209 and the liquid level of the transmission medium in the booster tank 204 are evenly located below the extended pressing plate 213;

[0030] Compared with the existing method of reserving a certain stamping space to accommodate springback based on material properties, the present invention solves the problem of springback during hot stamping without the need for preliminary preparation to calculate the size of the reserved space for anti-springback of each material, which is beneficial to eliminating a large amount of preliminary preparation work. At the same time, as long as the changes in factors such as temperature during stamping are within the safety threshold, the adverse effects on stamping forming are small, thereby improving the qualified rate of automobile parts after stamping.

[0031] like Figure 1-Figure 6 As shown, support columns 3 are fixed around the surface of the working platform 1, and a placement plate 4 is fixed on the top of the support columns 3, a hydraulic push rod 5 is fixed in the middle of the placement plate 4, and the bottom end of the hydraulic push rod 5 is fixedly connected to the top surface of the upper mold 211, and guide columns 6 are passed through the upper mold 211 and the lower mold 201, and the bottom of the guide column 6 is fixedly connected to the surface of the working platform 1;

[0032] The specific operation is as follows: when the hydraulic push rod 5 extends to push the upper mold 211 downward, the upper mold 211 slides down along the outer wall of the guide column 6, so that the upper mold 211 can accurately fit with the lower mold 201;

[0033] At the end of hot stamping, the upper mold 211 slides up along the outer wall of the guide column 6 and separates from the lower mold 201. At this time, the extended pressure plate 213 is lifted up, causing the lifting piston rod 210 to lift up and reset. At this time, the liquid level of the transmission medium inside the pressure-compensating cylinder 206 drops. At the same time, the top of the lower mold core 203 loses force, causing the spring 208 to stretch and reset. At this time, the lower mold core 203 carries the molded automobile parts up and out of the lower mold 201, thereby facilitating the removal of the molded automobile parts.

[0034] In summary, when the hot stamping die for automobile parts is used, the lower die core 203 is first manufactured as a whole according to the structural size of the formed automobile parts, and the lower die core 203 is divided according to the overall structure to make it modularly designed, and the specific shape structure of the lower die core 203 is adapted according to the structure of the automobile parts and is not limited. Each lower die core 203 is located inside the lower die 201 and has elasticity through the transmission piston rod 207 and the spring 208 and can be lifted and lowered along the core hole 202. After heating, the steel plate to be stamped is placed inside the lower die 201 and supported by each lower die core 203 to ensure that the steel plate is placed stably and avoids skewing, so as to ensure that the steel plate is evenly stressed during stamping.

[0035] Then, when the hydraulic push rod 5 extends to push the upper mold 211 downward, the upper mold 211 slides down along the outer wall of the guide column 6, so that the upper mold 211 can accurately fit with the lower mold 201;

[0036] The upper mold 211 is lowered and pressed into the lower mold 201. At this time, the lower mold core 203 is forced to carry the transmission piston rod 207 downward and compress the spring 208. When the lower mold core 203 is lowered to the limit, it cooperates with the lower mold 201 and the upper mold 211 to make the steel plate hot stamped. At this time, the electric push rod 212 extends to push the expansion plate 213 downward. The expansion plate 213 is lowered to push the lifting piston rod 210 to press it into the transmission cylinder 209, so that the transmission medium inside the transmission cylinder 209 is The medium such as oil enters the inside of the booster box 204, and the transmission medium enters the inside of the booster cylinder 206 through the opening at the bottom thereof, thereby pushing up each transmission piston rod 207 from the bottom thereof, so that each lower die core 203 is closely attached to the lower surface of the steel plate and is pressed upward, thereby cooperating with the downward pressure of the upper die 211 to strengthen the punching force on the steel plate, thereby reducing the possibility of the steel plate rebounding. Since the lower die core 203 is modularly arranged, it can evenly apply upward pressure to each part of the complex automotive parts when forming them;

[0037] At the end of hot stamping, the upper mold 211 slides up along the outer wall of the guide column 6 and separates from the lower mold 201. At this time, the extended pressure plate 213 is lifted up, causing the lifting piston rod 210 to lift up and reset. At this time, the liquid level of the transmission medium inside the pressure-compensating cylinder 206 drops. At the same time, the top of the lower mold core 203 loses force, causing the spring 208 to stretch and reset. At this time, the lower mold core 203 carries the molded automobile parts up and out of the lower mold 201, thereby facilitating the removal of the molded automobile parts.

[0038] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A hot stamping die for automobile parts, comprising a working platform (1) and a pressing die assembly (2), characterized in that: The surface of the working platform (1) is provided with a pressure-compensating mold assembly (2), and the pressure-compensating mold assembly (2) comprises a lower mold (201), a core hole (202), a lower mold core (203), a pressure-compensating box (204), a baffle (205), a pressure-compensating cylinder (206), a transmission piston rod (207), a spring (208), a transmission cylinder (209), a lifting piston rod (210), an upper mold (211), an electric push rod (212), and an expansion pressure plate (213). The bottom of the inner wall of the lower mold (201) is provided with a core hole (202), and the interior of the core hole (202) is provided with a lower mold core (203). The bottom of the working platform (1) is connected to a pressure-compensating box (204), and the inner wall of the pressure-compensating box (204) is provided with a core hole (202). A baffle (205) is fixed at the lower part, a pressure-compensating cylinder (206) is penetrated inside the baffle (205), and a transmission piston rod (207) is penetrated at the top of the pressure-compensating cylinder (206), and a spring (208) is sleeved on the outer wall of the transmission piston rod (207), transmission cylinders (209) are connected to both sides of the pressure-compensating box (204), and a lifting piston rod (210) is penetrated at the top of the transmission cylinder (209), an upper mold (211) is arranged directly above the lower mold (201), and electric push rods (212) are fixed on both sides of the upper mold (211), and an expansion pressing plate (213) is fixed at the bottom of the electric push rod (212), and the upper mold (211) is lowered and pressed into the lower mold (201), at which time the lower mold is The core (203) is subjected to the force to carry the transmission piston rod (207) downward and compress the spring (208). When the lower mold core (203) is lowered to the limit, it cooperates with the lower mold (201) and the upper mold (211) to form the steel plate by hot stamping. At this time, the electric push rod (212) extends to push the expansion pressure plate (213) downward. The expansion pressure plate (213) descends and pushes the lifting piston rod (210) to press it into the transmission cylinder (209), so that the transmission medium in the transmission cylinder (209) enters the inside of the pressure compensation box (204), and the transmission medium enters the inside of the pressure compensation cylinder (206) through the opening at the bottom of the pressure compensation cylinder (206), thereby pushing each transmission piston rod (207) upward from the bottom, so that each lower mold core (203) is tightly attached to the The lower surface of the steel plate is pressed upward, thereby cooperating with the downward pressure of the upper mold (211) to strengthen the punching force on the steel plate to reduce the possibility of the steel plate rebounding. The outer opening structure size of the lower mold core (203) is matched with the inner opening structure size of the core hole (202), and the bottom of the lower mold core (203) is fixedly connected to the top of the transmission piston rod (207). The lower mold core (203) and the transmission piston rod (207) are elastically connected to the pressure-boosting cylinder (206) through a spring (208), and the outer opening structure size of the bottom end of the transmission piston rod (207) is matched with the inner opening structure size of the pressure-boosting cylinder (206). The pressure-boosting cylinder (206) is connected to the space below the internal baffle (205) of the pressure-boosting box (204) through the opening at its bottom.The pressure boosting cylinder (206) is connected to the transmission cylinder (209) through the pressure boosting box (204).

2. The hot stamping die for automobile parts according to claim 1, characterized in that: The lifting piston rod (210) is located on both sides of the lower mold (201) after passing through the working platform (1), and the top height of the lifting piston rod (210) is not higher than the top surface height of the lower mold (201).

3. The hot stamping die for automobile parts according to claim 1, characterized in that: The expansion pressing plate (213) is sleeved on the outer wall of the upper mold (211), and the lower surfaces on both sides of the expansion pressing plate (213) are located directly above the lifting piston rod (210).

4. The hot stamping die for automobile parts according to claim 1, characterized in that: The outer shape structure of the lower die core (203) is compatible with the outer shape structure of the automobile parts after hot stamping, and the lower die core (203) is modularly arranged.

5. The hot stamping die for automobile parts according to claim 1, characterized in that: Support columns (3) are fixed around the surface of the working platform (1), and a placement plate (4) is fixed on the top of the support columns (3).

6. The hot stamping die for automobile parts according to claim 5, characterized in that: A hydraulic push rod (5) is fixed in the middle of the placement plate (4), and the bottom end of the hydraulic push rod (5) is fixedly connected to the top surface of the upper mold (211).

7. The hot stamping die for automobile parts according to claim 1, characterized in that: The upper mold (211) and the lower mold (201) are penetrated by guide columns (6) on all sides, and the bottom of the guide columns (6) is fixedly connected to the surface of the working platform (1).

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