Stamping part supporting device of aluminum alloy precision die forging stamping die

Abstract

The invention discloses a stamping part supporting device of an aluminum alloy precision die forging stamping die, and relates to the technical field of stamping dies, the stamping part supporting device comprises a base, a tray body is fixedly mounted at the top of the base, and a hollow frame is fixedly mounted at the top of the base; the clamping device is arranged on the inner wall of the hollow frame, the clamping device comprises an electric push rod, a push plate, a spring, a sliding rod, a clamping plate, a sliding rod, a toothed plate, a triangular block and an elastic telescopic plate, and the output end of the electric push rod moves in the direction close to the stamping part to drive the push plate to move in the direction of the stamping part; the push plate moves towards the stamping part to drive the sliding rod to move towards the stamping part, the electric push rod is fixedly installed on the inner wall of the hollow frame, the push plate is fixedly installed at the output end of the electric push rod, and a round hole is formed in the surface of the push plate to prevent the stamping part from shaking in the tray body in the stamping process. Therefore, the appearance of the stamped part is incomplete, and the stamping effect is affected.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, in particular to a stamping part supporting device of a stamping die for an aluminum alloy precision forging part. Background Art

[0002] A stamping die is a special process equipment used to process materials into parts during cold stamping. It is called a cold stamping die. It is a pressure processing method that uses a die installed on a press to apply pressure to the material to cause it to separate or plastically deform, thereby obtaining the desired parts.

[0003] The patent with the patent announcement number CN215090281U relates to a stamping part support device of a stamping die, and relates to the technical field of stamping dies. The stamping part support device of the aluminum alloy precision die forging stamping die comprises a base, and a fixing assembly is arranged on the top of the base, and the fixing assembly comprises a vertical rod, a disc, a first connecting rod, a second connecting rod, a third connecting rod, a first clamping plate, a threaded rod and a second clamping plate. The vertical rod is arranged on the top of the base, and the disc is fixedly connected to the bottom of the vertical rod, and the first connecting rod is arranged on both sides of the disc. The stamping part support device of the aluminum alloy precision die forging stamping die, when the tray body moves downward, drives the second connecting rod to move upward, and the second connecting rod moves upward, and then drives one end of the third connecting rod to tilt upward and the other end to move downward, and then drives the second clamping plate to clamp and fix the stamping part. This structure is beneficial to clamp and fix the stamping part, and prevents the stamping part from shaking inside the tray when stamping downward, thereby damaging the stamping part.

[0004] In the above patent, the downward movement of the tray body drives the second connecting rod to move upward. The upward movement of the second connecting rod can then drive one end of the third connecting rod to tilt upward and the other end to move downward, thereby driving the second clamping plate to clamp and fix the stamping part. This structure is beneficial for clamping and fixing the stamping part to prevent the stamping part from shaking inside the tray when stamping downward, thereby damaging the stamping part. However, the sizes of the stamping parts may be different, and they may not match the stamping parts during the clamping process, resulting in the inability to accurately clamp the stamping parts, affecting the stamping forming. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a stamping part supporting device for a stamping die of an aluminum alloy precision forging part, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A blank holding device for a stamping die of an aluminum alloy precision forging, comprising: a base, a tray body is fixedly installed on the top of the base, and a hollow frame is fixedly installed on the top of the base; a clamping device, the clamping device is arranged on the inner wall of the hollow frame, and the clamping device includes an electric push rod, a push plate, a spring, a sliding rod, a clamping plate, a sliding rod, a toothed plate, a triangular block and an elastic telescopic plate. By moving the output end of the electric push rod towards the stamping part, the push plate is driven to move towards the stamping part. When the push plate moves towards the stamping part, the sliding rod will be driven to move towards the stamping part. The electric push rod is fixedly installed on the inner wall of the hollow frame, the push plate is fixedly installed at the output end of the electric push rod, a round hole is opened on the surface of the push plate, the sliding rod slidably penetrates the surface of the push plate, the clamping plate is fixedly installed at the end of the sliding rod away from the push plate, the spring is sleeved on the surface of the sliding rod, one end of the spring is fixedly installed on the surface of the push plate, and the other end of the spring is fixedly installed on the surface of the clamping plate. The sliding rod is fixedly installed on the surface of the clamping plate, the toothed plate is fixedly installed at the fixed end of the electric push rod, the triangular block is slidably installed on the surface of the push plate, and the elastic telescopic plate is fixedly installed at the bottom of the triangular block. When the clamping plate moves towards the electric push rod, the sliding rod will be driven to move towards the electric push rod. When the sliding rod moves towards the electric push rod, it will contact the triangular block and limit the electric push rod through the elastic telescopic plate.

[0007] According to the above technical solution, a first spring is arranged between the triangular block and the push plate, and the triangular block is driven to reset by the first spring. The sliding rod and the triangular block are on the same horizontal plane, and the elastic telescopic plate is arranged above the toothed plate. By setting the elastic telescopic plate, it is prevented from getting stuck on the toothed plate.

[0008] According to the above technical solution, it further includes a correction device and an anti-adhesion device. The correction device includes a fixing plate, a rotating plate, a connecting plate, a pulley and a sliding plate. When the sliding rod moves away from the stamping part, the fixing plate will be driven to move away from the stamping part. When the fixing plate moves away from the stamping part, it will contact the rotating plate. The fixing plate is fixedly installed on the surface of the sliding rod, a groove is opened on the surface of the push plate, the rotating plate is rotatably installed on the inner wall of the groove, the connecting plate is fixedly installed on the circumferential surface of the rotating plate, the pulley is rotatably installed at the bottom of the connecting plate, and the sliding plate is slidably installed on the top of the tray body.

[0009] According to the above technical solution, an elastic telescopic rod is fixedly installed on the surface of the sliding plate, and a correction plate is fixedly installed at the free end of the elastic telescopic rod. When the elastic telescopic rod moves towards the stamping part, the correction plate will be driven to move towards the stamping part. The stamping part is corrected by the elastic telescopic rod and the correction plate.

[0010] According to the above technical solution, a first torsion spring is provided between the rotating plate and the groove, and the rotating plate is driven to reset by the first torsion spring. The rotating plate is in contact with the surface of the fixed plate, and the pulley and the sliding plate are arranged on the same horizontal plane.

[0011] According to the above technical solution, the anti-adhesion device includes an L-shaped plate, a sealing plate, a pneumatic box, a pneumatic plate, a return spring and a connecting rod. When the sliding plate moves towards the stamping part, it will drive the L-shaped plate to move towards the stamping part. When the L-shaped plate moves towards the stamping part, it will drive the sealing plate to move towards the stamping part. The L-shaped plate is fixedly installed on the surface of the sliding plate, the sealing plate is fixedly installed on the top of the L-shaped plate, the pneumatic box is fixedly installed on the inner wall of the hollow frame, an air outlet is provided on the surface of the pneumatic box, a chute is provided at the bottom of the pneumatic box, the sealing plate is slidably installed on the inner wall of the chute, the pneumatic plate is fixedly installed on the top of the sealing plate, the connecting rod is fixedly installed on the inner wall of the pneumatic box, the return spring is sleeved on the surface of the connecting rod, one end of the return spring is fixedly installed on the inner wall of the pneumatic box, and the other end of the return spring is fixedly installed on the surface of the pneumatic plate.

[0012] According to the above technical solution, a fixed rod is fixedly installed on the surface of the pneumatic plate, a rotating plate is rotatably installed on the inner wall of the air outlet, a fixed block is fixedly installed on the circumferential surface of the rotating plate, when the fixed rod moves towards the air outlet, it will contact the fixed block, the fixed rod will push the fixed block to rotate, and the rotation of the fixed block will drive the rotating plate to rotate.

[0013] According to the above technical solution, a second torsion spring is provided between the air outlet and the rotating plate, and the rotating plate is driven to reset by the second torsion spring. The fixed rod and the fixed block are arranged on the same horizontal plane.

[0014] The present invention provides a stamping part supporting device for a stamping die of an aluminum alloy precision forging part, having the following beneficial effects: (1) In this invention, when the sliding rod moves towards the stamping part, it will drive the clamping plate to clamp the stamping part, preventing the stamping part from shaking inside the tray body during the stamping process, resulting in an incomplete appearance of the stamped part and affecting the stamping effect. At the same time, the spring can adapt to stamping parts of different sizes, improving the applicable range. At the same time, when the triangular block moves downward, it will drive the elastic telescopic plate to move downward. When the elastic telescopic plate moves downward, the free end of the elastic telescopic plate will be stuck into the toothed plate, and the elastic telescopic plate is used to limit the electric push rod, preventing the electric push rod from continuously pushing and causing excessive clamping force, resulting in deformation of the stamping part and affecting the stamping effect.

[0015] (2) In this invention, when the pulley rotates towards the direction close to the tray body, it will contact the sliding plate, and the pulley will push the sliding plate towards the direction of the stamping part. By correcting the stamping part, it can prevent the inaccurate placement of the stamping part during stamping, which may lead to non - standard stamped parts, increasing the production cost. At the same time, when the elastic telescopic rod moves towards the direction close to the stamping part, it will drive the correction plate to move towards the direction close to the stamping part. The stamping part is corrected by the elastic telescopic rod and the correction plate to prevent the inability to accurately correct and position the stamping part when the stamping part is too large or too small, thus affecting the stamping effect.

[0016] (3) In this invention, when the sealing plate moves towards the direction close to the stamping part, it will drive the air pressure plate to move towards the direction close to the stamping part. When the air pressure plate moves towards the direction close to the stamping part, it will squeeze the air inside the air pressure box and discharge it through the air outlet. The blown gas is used to blow away the impurities remaining on the top of the stamping part to prevent affecting subsequent stamping forming. At the same time, when the fixed block rotates, it will drive the rotating plate to rotate, and the rotating plate rotation will slowly expand the air outlet, so that the blown gas blows the impurities on the stamping part from the middle of the stamping part to both sides slowly, improving the effect of removing impurities. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall sectional structure of the present invention; Figure 3 It is a schematic diagram of the structure of the clamping device of the present invention; Figure 4 It is a schematic diagram of the sectional structure of the push plate of the present invention; Figure 5 It is a schematic diagram of the position structure of the sliding plate and the L - shaped plate of the present invention; Figure 6 It is a schematic diagram of the sectional structure of the air pressure box of the present invention; Figure 7 It is a schematic diagram of the structure of the air pressure box and the rotating plate of the present invention.

[0018] In the figure: 1, base; 2, tray body; 3, hollow frame; 4, electric push rod; 5, push plate; 6, spring; 7, sliding rod; 8, clamping plate; 9, sliding rod; 10, toothed plate; 11, triangular block; 12, elastic telescopic plate; 131, fixed plate; 132, rotating plate; 133, connecting plate; 134, pulley; 135, sliding plate; 136, elastic telescopic rod; 137, correction plate; 141, L - shaped plate; 142, sealing plate; 143, air pressure box; 144, air pressure plate; 145, return spring; 146, connecting rod; 147, fixed rod; 148, rotating plate; 149, fixed block. Detailed Embodiment

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 7 , an embodiment of the present invention is: a blank holding device for a stamping die of an aluminum alloy precision forging, including a base 1, a tray body 2 fixedly installed on the top of the base 1, and a hollow frame 3 fixedly installed on the top of the base 1; a clamping device, the clamping device is arranged on the inner wall of the hollow frame 3, and the clamping device includes an electric push rod 4, a push plate 5, a spring 6, a sliding rod 7, a clamping plate 8, a sliding rod 9, a toothed plate 10, a triangular block 11 and an elastic telescopic plate 12, to prevent the stamping part from shaking inside the tray body 2 during the stamping process, resulting in an incomplete appearance of the stamped part and affecting the stamping effect. The electric push rod 4 is fixedly installed on the inner wall of the hollow frame 3, the push plate 5 is fixedly installed at the output end of the electric push rod 4, a round hole is opened on the surface of the push plate 5, the sliding rod 7 slides through the surface of the push plate 5, the clamping plate 8 is fixedly installed at the end of the sliding rod 7 away from the push plate 5, the spring 6 is sleeved on the surface of the sliding rod 7, one end of the spring 6 is fixedly installed on the surface of the push plate 5, and the other end of the spring 6 is fixedly installed on the surface of the clamping plate 8. The sliding rod 9 is fixedly installed on the surface of the clamping plate 8, the toothed plate 10 is fixedly installed at the fixed end of the electric push rod 4, the triangular block 11 is slidably installed on the surface of the push plate 5, and the elastic telescopic plate 12 is fixedly installed at the bottom of the triangular block 11, to prevent the electric push rod 4 from continuously pushing and causing excessive clamping force, resulting in deformation of the stamping part and affecting the stamping effect.

[0021] A first spring is arranged between the triangular block 11 and the push plate 5 to drive the triangular block 11 to reset through the first spring. The sliding rod 9 and the triangular block 11 are on the same horizontal plane. The elastic telescopic plate 12 is arranged above the toothed plate 10. By arranging the elastic telescopic plate 12, it is prevented from getting stuck on the toothed plate 10.

[0022] During the operation of this embodiment, the output end of the electric push rod 4 moves towards the stamping part, driving the push plate 5 to move towards the stamping part. The movement of the push plate 5 towards the stamping part will drive the sliding rod 7 to move towards the stamping part. The movement of the sliding rod 7 towards the stamping part will drive the clamping plate 8 to clamp the stamping part, preventing the stamping part from shaking inside the tray body 2 during the stamping process, resulting in an incomplete appearance of the stamped part and affecting the stamping effect. At the same time, the spring 6 can be used to adapt to stamping parts of different sizes, improving the scope of application. At the same time, when the clamping plate 8 contacts the stamping part, due to the reverse force, the clamping plate 8 will squeeze the spring 6 and the sliding rod 7 to move towards the electric push rod 4. The movement of the clamping plate 8 towards the electric push rod 4 will drive the sliding rod 9 to move towards the electric push rod 4. The movement of the sliding rod 9 towards the electric push rod 4 will contact the triangular block 11, and the sliding rod 9 will push the triangular block 11 downward. The downward movement of the triangular block 11 will move the elastic telescopic plate 12 downward. When the elastic telescopic plate 12 moves downward, the free end of the elastic telescopic plate 12 will be stuck into the toothed plate 10, limiting the electric push rod 4 through the elastic telescopic plate 12 to prevent the electric push rod 4 from continuously pushing, resulting in excessive clamping force and causing the stamping part to deform, affecting the stamping effect.

[0023] Please refer to Figures 1 - 7 , on the basis of the above embodiment, in another embodiment of the present invention, it further includes a correction device and an anti-adhesion device. The correction device includes a fixing plate 131, a rotating plate 132, a connecting plate 133, a pulley 134, and a sliding plate 135. The fixing plate 131 is fixedly installed on the surface of the sliding rod 7. A groove is formed on the surface of the push plate 5. The rotating plate 132 is rotatably installed on the inner wall of the groove. The connecting plate 133 is fixedly installed on the circumferential surface of the rotating plate 132. The pulley 134 is rotatably installed at the bottom of the connecting plate 133. The sliding plate 135 is slidably installed on the top of the tray body 2, preventing the stamping part from being placed inaccurately during stamping, resulting in the stamped part not meeting the standard and increasing the production cost.

[0024] An elastic telescopic rod 136 is fixedly installed on the surface of the sliding plate 135, and a correction plate 137 is fixedly installed at the free end of the elastic telescopic rod 136, preventing the stamping part from being too large or too small and unable to accurately correct and position the stamping part, affecting the stamping effect.

[0025] A first torsion spring is provided between the rotating plate 132 and the groove. The first torsion spring drives the rotating plate 132 to reset. The rotating plate 132 contacts the surface of the fixing plate 131, and the pulley 134 and the sliding plate 135 are arranged on the same horizontal plane.

[0026] The anti-adhesion device includes an L-shaped plate 141, a sealing plate 142, a pneumatic box 143, a pneumatic plate 144, a return spring 145 and a connecting rod 146. The L-shaped plate 141 is fixedly installed on the surface of the sliding plate 135. The sealing plate 142 is fixedly installed on the top of the L-shaped plate 141. The pneumatic box 143 is fixedly installed on the inner wall of the hollow frame 3. An air outlet is provided on the surface of the pneumatic box 143, and a chute is provided at the bottom of the pneumatic box 143. The sealing plate 142 is slidably installed on the inner wall of the chute. The pneumatic plate 144 is fixedly installed on the top of the sealing plate 142. The connecting rod 146 is fixedly installed on the inner wall of the pneumatic box 143. The return spring 145 is sleeved on the surface of the connecting rod 146. One end of the return spring 145 is fixedly installed on the inner wall of the pneumatic box 143, and the other end of the return spring 145 is fixedly installed on the surface of the pneumatic plate 144. The impurities remaining on the top of the stamping part are blown away by the blown gas to prevent affecting the subsequent stamping and forming.

[0027] A fixing rod 147 is fixedly installed on the surface of the pneumatic plate 144. A rotating plate 148 is rotatably installed on the inner wall of the air outlet. A fixing block 149 is fixedly installed on the circumferential surface of the rotating plate 148. The rotation of the rotating plate 148 will gradually expand the air outlet, so that the blown gas will blow the impurities on the stamping part from the middle of the stamping part to both sides gradually, improving the effect of removing impurities.

[0028] A second torsion spring is provided between the air outlet and the rotating plate 148 to drive the rotating plate 148 to reset through the second torsion spring. The fixing rod 147 and the fixing block 149 are arranged on the same horizontal plane.

[0029] When this embodiment works, moving the sliding rod 7 away from the stamping part will drive the fixing plate 131 to move away from the stamping part. Moving the fixing plate 131 away from the stamping part will contact the rotating plate 132, and the fixing plate 131 will push the rotating plate 132 to rotate. The rotation of the rotating plate 132 will drive the connecting plate 133 to rotate towards the tray body 2. The rotation of the connecting plate 133 towards the tray body 2 will drive the pulley 134 to rotate towards the tray body 2. The rotation of the pulley 134 towards the tray body 2 will contact the sliding plate 135, and the pulley 134 will push the sliding plate 135 towards the stamping part. By correcting the stamping part, it is prevented that during stamping, the stamping part is not placed accurately, resulting in the stamped parts not meeting the standards, increasing the production cost. At the same time, when the sliding plate 135 moves towards the stamping part, it will drive the elastic telescopic rod 136 to move towards the stamping part. The movement of the elastic telescopic rod 136 towards the stamping part will drive the correction plate 137 to move towards the stamping part. The stamping part is corrected through the elastic telescopic rod 136 and the correction plate 137 to prevent the stamping part from being too large or too small and unable to accurately correct and position the stamping part, affecting the stamping effect.

[0030] When the skateboard 135 moves towards the stamping part, it will drive the L-shaped plate 141 to move towards the stamping part. When the L-shaped plate 141 moves towards the stamping part, it will drive the sealing plate 142 to move towards the stamping part. When the sealing plate 142 moves towards the stamping part, it will drive the air pressure plate 144 to move towards the stamping part. When the air pressure plate 144 moves towards the stamping part, it will squeeze the air inside the air pressure box 143 to be discharged through the air outlet. The blown gas is used to blow away the impurities remaining on the top of the stamping part to prevent affecting subsequent stamping forming. At the same time, when the air pressure plate 144 moves towards the stamping part, it will drive the fixed rod 147 to move towards the air outlet. When the fixed rod 147 moves towards the air outlet, it will contact the fixed block 149, and the fixed rod 147 will push the fixed block 149 to rotate. When the fixed block 149 rotates, it will drive the rotating plate 148 to rotate. When the rotating plate 148 rotates, the air outlet will slowly expand, so that the blown gas will blow the impurities on the stamping part from the middle of the stamping part to both sides slowly, improving the effect of removing impurities.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blank holding device for a stamping part of a precision forging die for aluminum alloy, characterized in that, It includes a base (1), a tray body (2) is fixedly installed on the top of the base (1), and a hollow frame (3) is fixedly installed on the top of the base (1); A clamping device, the clamping device is arranged on the inner wall of the hollow frame (3), and the clamping device includes an electric push rod (4), a push plate (5), a spring (6), a sliding rod (7), a clamping plate (8), a sliding rod (9), a toothed plate (10), a triangular block (11) and an elastic telescopic plate (12). The electric push rod (4) is fixedly installed on the inner wall of the hollow frame (3), the push plate (5) is fixedly installed at the output end of the electric push rod (4), a circular hole is formed on the surface of the push plate (5), the sliding rod (7) slidably penetrates through the surface of the push plate (5), the clamping plate (8) is fixedly installed at one end of the sliding rod (7) away from the push plate (5), the spring (6) is sleeved on the surface of the sliding rod (7), one end of the spring (6) is fixedly installed on the surface of the push plate (5), the other end of the spring (6) is fixedly installed on the surface of the clamping plate (8), the sliding rod (9) is fixedly installed on the surface of the clamping plate (8), the toothed plate (10) is fixedly installed at the fixed end of the electric push rod (4), the triangular block (11) is slidably installed on the surface of the push plate (5), and the elastic telescopic plate (12) is fixedly installed at the bottom of the triangular block (11); Among them, a correcting device for correcting the stamping part is arranged on the push plate (5), and an anti-adhesion device is arranged on the hollow frame (3).

2. The blank holding device for the stamping part of the precision forging die of aluminum alloy according to claim 1, characterized in that: A first spring is arranged between the triangular block (11) and the push plate (5), the sliding rod (9) and the triangular block (11) are on the same horizontal plane, and the elastic telescopic plate (12) is arranged above the toothed plate (10).

3. The blank holding device for the stamping part of the precision forging die of aluminum alloy according to claim 2, characterized in that: The correcting device includes a fixing plate (131), a rotating plate (132), a connecting plate (133), a pulley (134) and a sliding plate (135). The fixing plate (131) is fixedly installed on the surface of the sliding rod (7), a groove is formed on the surface of the push plate (5), the rotating plate (132) is rotatably installed on the inner wall of the groove, the connecting plate (133) is fixedly installed on the circumferential surface of the rotating plate (132), the pulley (134) is rotatably installed at the bottom of the connecting plate (133), and the sliding plate (135) is slidably installed on the top of the tray body (2).

4. The blank holding device for stamping parts of a precision forging die for aluminum alloy according to claim 3, characterized in that: An elastic telescopic rod (136) is fixedly installed on the surface of the sliding plate (135), and a correcting plate (137) is fixedly installed at the free end of the elastic telescopic rod (136).

5. The blank holding device for the stamping part of the precision forging die for aluminum alloy according to claim 4, characterized in that: A first torsion spring is arranged between the rotating plate (132) and the groove, the rotating plate (132) is in contact with the surface of the fixing plate (131), and the pulley (134) and the sliding plate (135) are on the same horizontal plane.

6. The blank holding device for stamping parts of a precision forging die for aluminum alloy according to claim 5, characterized in that: The anti-adhesion device includes an L-shaped plate (141), a sealing plate (142), a pneumatic box (143), a pneumatic plate (144), a return spring (145) and a connecting rod (146). The L-shaped plate (141) is fixedly installed on the surface of the sliding plate (135). The sealing plate (142) is fixedly installed on the top of the L-shaped plate (141). The pneumatic box (143) is fixedly installed on the inner wall of the hollow frame (3). An air outlet is formed on the surface of the pneumatic box (143). A chute is formed at the bottom of the pneumatic box (143). The sealing plate (142) is slidably installed on the inner wall of the chute. The pneumatic plate (144) is fixedly installed on the top of the sealing plate (142). The connecting rod (146) is fixedly installed on the inner wall of the pneumatic box (143). The return spring (145) is sleeved on the surface of the connecting rod (146). One end of the return spring (145) is fixedly installed on the inner wall of the pneumatic box (143), and the other end of the return spring (145) is fixedly installed on the surface of the pneumatic plate (144).

7. The blank holding device for the stamping part of the precision forging die for aluminum alloy according to claim 6, characterized in that: A fixed rod (147) is fixedly installed on the surface of the pneumatic plate (144). A rotating plate (148) is rotatably installed on the inner wall of the air outlet. A fixed block (149) is fixedly installed on the circumferential surface of the rotating plate (148).

8. The blank holding device for the stamping part of the precision forging die for aluminum alloy according to claim 7, characterized in that: A second torsion spring is arranged between the air outlet and the rotating plate (148). The fixed rod (147) and the fixed block (149) are arranged on the same horizontal plane.

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