Fine blanking die applied to motorcycle clutch gear

Abstract

The invention belongs to the technical field of stamping equipment, and particularly relates to a fine stamping die applied to a motorcycle clutch gear. Comprising a base, a female die assembly, a male die assembly and a driving assembly are sequentially arranged on the base, the female die assembly comprises a fixing base and a female die plate, the male die assembly comprises a mounting base, a sliding base and a male die, the fixing base is fixedly connected to the base through bolts, the female die plate is fixedly connected to the center of the fixing base, and four supporting rods are vertically connected to the four corners of the fixing base; a pressing device is further arranged on the mounting base, an opening is formed in the center of the pressing device so that the male die can penetrate through the opening to make contact with the female die plate, and limiting assemblies connected with the sliding base are further arranged on the two sides of the mounting base. According to the fine stamping die applied to the motorcycle clutch gear, stamping materials are gradually deformed through the pressing device arranged above the female die, tearing during forming is prevented, irregular edges generated in the forming process can be reduced, and the forming quality of parts is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of stamping equipment, and particularly relates to a fine blanking die applied to a motorcycle clutch gear. Background Art

[0002] Fine blanking, namely precision blanking, includes forced-edge precision blanking, opposed-die precision blanking, and plane-edge precision blanking. The production of automotive fine blanked parts mainly uses forced-edge precision blanking. The geometric shape, dimensional tolerance, form and position tolerance, and shear surface quality of fine blanked parts are much higher than those of ordinary blanked parts. The fine blanking process plays a very important role in the field of automotive part manufacturing. There are essential differences between the process characteristics of fine blanking and ordinary blanking. In ordinary blanking, the tearing of the sheet metal is controlled during the blanking process, while in fine blanking, every effort is made to suppress the tearing of the sheet metal during blanking. The part remains integral until it is separated from the sheet metal during fine blanking, and the metal sheet is always in a plastic deformation process during the fine blanking process.

[0003] The patent with Chinese Publication No. CN106734614A discloses a nine-hole fine blanking die for a motorcycle clutch gear, including an upper die assembly and a lower die assembly. An anti-pressure punch assembly is provided in the upper die assembly. The upper die assembly includes an upper connecting plate, an upper bearing plate, an upper pad, an upper template, an upper backing plate, and a concave die connected in sequence from top to bottom. The anti-pressure punch assembly is located in the upper backing plate and the concave die. A punch assembly is provided on the lower die assembly. The lower die assembly includes a lower connecting plate. A lower pad is arranged above the lower connecting plate. The top end of the lower pad is connected to a lower template. The top end of the lower template is connected to a lower backing plate. The lower backing plate is connected to a punch guiding pressure plate by a cylindrical pin. The top end of the lower connecting plate is connected to a lower force transmission column. The lower force transmission column passes through the lower pad, the lower template, the lower backing plate, and is connected to the punch assembly in sequence from the lower connecting plate. The punch assembly is located below the anti-pressure punch assembly and the two are in mutual movable pressing. This invention has accurate positioning, firm fastening, reduces die misalignment, and improves the precision of stamping processing. However, when using this fine blanking die, the upper die assembly and the lower die assembly directly stamp the part, and the cut edge of the part is not neat, and the large curvature change results in a low shear surface quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a fine blanking die applied to a motorcycle clutch gear to solve the problems existing in the above background art. When in use, a pressing device arranged above the concave die enables the stamping material to gradually deform to prevent tearing during forming, and can reduce the irregular edges generated during the forming process and improve the forming quality of the part.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A fine blanking die for a motorcycle clutch gear, comprising a base, on which a female die assembly, a male die assembly and a driving assembly are sequentially arranged. The female die assembly includes a fixed seat and a female die plate. The male die assembly includes a mounting seat, a sliding seat and a male die. The driving assembly includes a hydraulic pump, a liquid delivery pipe, a hydraulic cylinder, a sealing flange and a push column. The fixed seat is fixedly connected to the base by bolts, and the female die plate is fixedly connected to the center of the fixed seat. Four support rods are vertically connected to the four corners, and the tops of the support rods are fixedly connected to the mounting seat. A sliding seat connected to the support rods is arranged between the fixed seat and the mounting seat. The lower end center of the sliding seat is fixedly connected to the male die. A hydraulic cylinder is fixedly connected inside the mounting seat, and a push column is connected inside the hydraulic cylinder. The lower end of the push column is fixedly connected to the sliding seat. The outer ring of the sealing flange is closely connected to the mounting seat and the inner ring is closely connected to the push column. The hydraulic pump is installed on the base and delivers hydraulic oil through the liquid delivery pipe into the hydraulic cylinder to drive the push column to press down. A pressing device is also arranged on the mounting seat. The center of the pressing device is open so that the male die can pass through the opening to contact the female die plate. Limiting components connected to the sliding seat are also arranged on both sides of the mounting seat.

[0006] Further, the pressing device includes a clamping seat and a transition seat. Both sides of the clamping seat are fixed to the side of the mounting seat by clamping plates. A clamping mechanism for fixing the stamping material is arranged on the clamping seat. The transition seat is installed at the lower end of the clamping seat and fits with the upper end of the mounting seat.

[0007] Further, the limiting components include a connecting seat, a cylindrical cavity, a connecting column and a column head. The connecting seats are respectively fixed at the corners of the mounting seat and the sliding seat up and down. The cylindrical cavity is fixed on the lower connecting seat, and the connecting column is fixed on the upper connecting seat. The lower end of the connecting column is placed inside the cylindrical cavity, and the column head is slidably connected to the cylindrical cavity, and the upper end of the column head is fixedly connected to the lower end of the connecting column.

[0008] Further, the clamping mechanism includes a housing, a top block, a screw, a spring and an adjusting nut. The housing is installed on the outer contour of the clamping seat. Through holes are opened at the centers of the four sides of the housing, and screws are connected inside the holes. The inner end surface of the screw is connected to the top block, and the outer end surface is connected to the adjusting nut. The spring is sleeved on the screw, and one end of the spring is connected to the top block and the other end is connected to the inner wall of the housing.

[0009] Further, a connecting plate for connecting the clamping seat is also arranged on the housing. A straight slot is opened on the connecting plate, and the connecting plate is fixed to the clamping seat by bolts, and the height position of the connecting plate on the clamping seat can be adjusted.

[0010] Further, a set of deep grooves are also arranged on the outer surface of the top block.

[0011] Further, the inner wall of the transition seat is composed of multiple sections of arcs smoothly transitioning.

[0012] Furthermore, a control valve is provided on the infusion tube, and an oil storage tank communicating with the infusion tube is also provided inside the base.

[0013] The beneficial effects of the present invention are as follows: 1) The present invention is provided with a pressing device, which fixes the stamping part through the clamping seat. Before the punch presses down and the stamping part contacts the concave template, the stamping part will first be extruded by the transition seat, so that the outer contour of the stamping part is consistent with the inner wall contour of the transition seat, that is, it first shrinks inward at the rounded corner and then falls onto the concave template. Then, continue to press down the stamping material to make its outer shape fit the concave die until the shear surface contacts the rounded corner at the lower end of the transition seat, and the edge is finished by extrusion. During the whole process, the stamping part is first positioned by the clamping seat to prevent shaking during extrusion, ensuring the accuracy of the downward pressure. Secondly, during extrusion, the bottom edge is finished first, and finally the top edge is finished, reducing the tearing of the elastic deformation of the part during stamping and improving the stamping quality.

[0014] 2) The clamping mechanism provided by the present invention uses a plurality of top blocks and springs to cooperate to fix the stamping material in the housing. During stamping, it ensures that the workpiece will not move along the horizontal plane, enabling it to be stretched downward. At the same time, the fixed spring will release elastic force and squeeze the workpiece towards the center, making it always located at the stamping center, preventing deformation and deviation from the center of the concave template, ensuring uniform stress during stamping and good forming effect. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present invention;

[0016] Figure 2 is a side view of the present invention;

[0017] Figure 3 is Figure 2 a half-sectional view of

[0018] Figure 4 is Figure 1 a sectional view of

[0019] Figure 5 is a structural schematic diagram of the clamping mechanism;

[0020] Figure 6 is a structural schematic of the clamping seat;

[0021] Figure 7 is a sectional view of the transition seat;

[0022] Figure 8 is a structural schematic diagram of the top block.

[0023] In the figure: 1, base; 2, female die assembly; 3, male die assembly; 4, drive assembly; 2-1, fixed seat; 2-2, female die plate; 3-1, mounting seat; 3-2, sliding seat; 3-3, male die; 4-1, hydraulic pump; 4-2, infusion tube; 4-3, hydraulic cylinder; 4-4, sealing flange; 4-5, push column; 5, support rod; 6, pressing device; 7, limit assembly; 6-1, clamping seat; 6-2, transition seat; 7-1, connecting seat; 7-2, cylindrical cavity; 7-3, connecting column; 7-4, column head; 8, clamping mechanism; 8-1, housing; 8-2, top block; 8-3, screw; 8-4, spring; 8-5, adjusting nut; 9, connecting plate; 10, straight notch; 11, deep groove. Detailed implementation manner

[0024] Example: As Figure 1-8 shown, a fine blanking die applied to a motorcycle clutch gear according to the present invention includes a base 1. A female die assembly 2, a male die 3-3 assembly 3, and a drive assembly 4 are sequentially arranged on the base 1. The female die assembly 2 includes a fixed seat 2-1 and a female die plate 2-2. The male die 3-3 assembly 3 includes a mounting seat 3-1, a sliding seat 3-2, and a male die 3-3. The drive assembly 4 includes a hydraulic pump 4-1, an infusion tube 4-2, a hydraulic cylinder 4-3, a sealing flange 4-4, and a push column 4-5. Among them, the fixed seat 2-1 is fixedly connected to the base 1 by bolts. The female die plate 2-2 is fixedly connected to the center of the fixed seat 2-1. Four support rods 5 are vertically connected at the four corners. The top of the support rods 5 is fixedly connected to the mounting seat 3-1. A sliding seat 3-2 connected to the support rods 5 is arranged between the fixed seat 2-1 and the mounting seat 3-1. The male die 3-3 is fixedly connected to the center of the lower end of the sliding seat 3-2. The hydraulic cylinder 4-3 is fixedly connected inside the mounting seat 3-1. A push column 4-5 is connected inside the hydraulic cylinder 4-3. The lower end of the push column 4-5 is fixedly connected to the sliding seat 3-2. The outer ring of the sealing flange 4-4 is closely connected to the mounting seat 3-1, and the inner ring is closely connected to the push column 4-5. The hydraulic pump 4-1 is installed on the base 1 and delivers hydraulic oil into the hydraulic cylinder 4-3 through the infusion tube 4-2 to drive the push column 4-5 to press down. A pressing device 6 is also arranged on the mounting seat 3-1. The center of the pressing device 6 is open so that the male die 3-3 can pass through the opening and contact the female die plate 2-2. Limit assemblies 7 connected to the sliding seat 3-2 are also arranged on both sides of the mounting seat 3-1. A control valve is also arranged on the infusion tube 4-2. An oil storage tank communicated with the infusion tube 4-2 is also arranged inside the base 1. When in use, power is provided by the drive assembly 4, and the male die 3-3 assembly 3 is pressed down onto the female die assembly 2 by a hydraulic structure. At the same time, the limit assemblies 7 ensure that the male die 3-3 assembly 3 will not be over-pressed against the female die assembly 2 during the downward pressing process, causing damage, and improving the service life of the die.

[0025] The pressing device 6 includes a clamping seat 6-1 and a transition seat 6-2. The two sides of the clamping seat 6-1 are fixed to the side surface of the mounting seat 3-1 through clamping plates. A clamping mechanism 8 for fixing the stamping material is provided on the clamping seat 6-1. The transition seat 6-2 is installed at the lower end of the clamping seat 6-1 and fits with the upper end of the mounting seat 3-1. The inner wall of the transition seat 6-2 is composed of a smooth transition of multiple arcs. During use, the inner wall of the transition seat 6-2 causes the downward pressing material to maintain a changing deformation, preventing tearing caused by directly stamping the shearing edge and thus avoiding uneven stress.

[0026] The limit component 7 includes a connecting seat, a cylindrical cavity 7-2, a connecting column 7-3, and a column head 7-4. The connecting seat is respectively fixed at the corners of the mounting seat 3-1 and the sliding seat 3-2 up and down. The cylindrical cavity 7-2 is fixed on the lower connecting seat, and the connecting column 7-3 is fixed on the upper connecting seat. The lower end of the connecting column 7-3 is placed inside the cylindrical cavity 7-2. The column head 7-4 is slidably connected to the cylindrical cavity 7-2, and the upper end of the column head 7-4 is fixedly connected to the lower end of the connecting column 7-3.

[0027] The clamping mechanism 8 includes a housing 8-1, a top block 8-2, a screw 8-3, a spring 8-4, and an adjusting nut 8-5. The housing 8-1 is installed on the outer contour of the clamping seat 6-1. Through holes are opened at the centers of the four sides of the housing 8-1, and the screw 8-3 is connected inside the holes. The inner end face of the screw 8-3 is connected to the top block 8-2, and the outer end face is connected to the adjusting nut 8-5. The spring 8-4 is sleeved on the screw 8-3, and one end of the spring 8-4 is connected to the top block 8-2, and the other end is connected to the inner wall of the housing 8-1. A set of deep grooves 11 are also provided on the outer surface of the top block 8-2. A connecting plate 9 for connecting the clamping seat 6-1 is also provided on the housing 8-1. A straight notch 10 is opened on the connecting plate 9, and the connecting plate 9 is fixed to the clamping seat 6-1 through bolts, and the height position of the connecting plate 9 on the clamping seat 6-1 can be adjusted. During use, the housing 8-1 is fixed to the clamping seat 6-1 through the straight notch 10 on the connecting plate 9, and the height position up and down can be adjusted, facilitating the close fitting of the transition seat 6-2 with the top surface of the female die. The top block 8-2 squeezes the stamping material between the top blocks 8-2 to the center of the housing 8-1 through the extrusion of the spring 8-4 with the housing 8-1. By rotatably connecting the adjusting nut 8-5 with the screw 8-3, the elongation length of the top block 8-2 and the energy storage size of the spring 8-4 can be controlled, ensuring a tight connection between the top block 8-2 and the stamping material. The deep grooves 11 provided on the end face of the top block 8-2 can increase the friction force, causing the stamping material to always be squeezed towards the edge of the stamping material at the center when the stamping material is stretched downward, preventing deviation and detachment.

[0028] Working principle and usage steps: Place the stamping part on the clamping seat 6-1. By adjusting the nut 8-5, the clamping mechanism 8 fixes the stamping part at the center of the clamping seat 6-1. At this time, the transition seat 6-2 and the female die assembly 2 are sequentially fixed at the lower end of the clamping seat 6-1. The driving assembly 4 works to pump hydraulic oil from the hydraulic pump 4-1 into the hydraulic cylinder 4-3, thereby driving the push rod 4-5 to move downward, causing the moving seat and the punch 3-3 to move downward synchronously. During the process, the moving seat slides along the direction of the support rod 5 and is restricted by the limiting assembly 7, so that the punch 3-3 moves straight up and down without deviation. When the punch 3-3 first contacts the stamping part, it will squeeze the stamping part to stretch it towards the transition seat 6-2. At this time, the bottom edge of the stamping part will first converge inward along the inner wall of the transition seat 6-2. When continuing to press down, the outer contour of the stamping part uniformly converges inward and becomes smaller until the bottom of the stamping part contacts the female die plate 2-2. At this time, when continuing to press down the stamping part, it will be flattened and expand outward, causing the outer contour of the stamping part to fit the shape of the female die plate 2-2 and deform gradually to form. During the forming process, the outer contour will squeeze the arc of the inner wall of the transition seat 6-2 to make its deformation smooth. Finally, after forming, the top outer contour converges by the inner wall of the transition seat 6-2 to make it smooth, with uniform force and improved stamping quality.

[0029] The present invention is provided with a pressing device to fix the stamping part through the clamping seat. Before the punch presses down the stamping part and contacts the female die plate, the stamping part will first be squeezed by the transition seat, making the outer contour of the stamping part consistent with the inner wall contour of the transition seat, that is, first shrinking inward in a rounded corner and falling onto the female die plate. Continuing to press down the stamping material makes it deform outward and fit the female die. Until the shear surface contacts the rounded corner at the lower end of the transition seat, the edge trimming is completed by extrusion. During the whole process, the stamping part is first positioned by the clamping seat to prevent shaking during extrusion and ensure the accuracy of the downward pressure. Secondly, during extrusion, the bottom edge is trimmed first, and finally the top edge is trimmed, reducing the tearing of the elastic deformation of the part during stamping and improving the stamping quality.

[0030] The clamping mechanism set in the present invention uses multiple top blocks and springs in cooperation to fix the stamping material in the housing. During stamping, it ensures that the workpiece will not move along the horizontal plane, making it stretch downward. At the same time, the fixed spring will release elastic force and squeeze the workpiece towards the center, making it always located at the stamping center, preventing deformation from deviating from the center of the female die plate, making the forces on each part uniform during stamping, and having a good forming effect.

[0031] The above is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall be covered within the scope of the claims of the present invention.

Claims

1. A fine stamping die for motorcycle clutch gear, characterized by: The invention comprises a base (1), on which a die assembly (2), a punch assembly (3-3) (3) and a driving assembly (4) are arranged in sequence, the die assembly (2) comprising a fixed seat (2-1) and a die plate (2-2), the punch assembly (3-3) (3) comprising a mounting seat (3-1), a sliding seat (3-2) and a punch (3-3), the driving assembly (4) comprising a hydraulic pump (4-1), a liquid infusion tube (4-2), a hydraulic cylinder (4-3), a sealing flange (4-4) and a pushing column (4-5), wherein the fixed seat (2-1) is fixedly connected to the base (1) by bolts, the center of the fixed seat (2-1) is fixedly connected to the die plate (2-2), four support rods (5) are vertically connected at four corners, the top of the support rod (5) is fixedly connected to the mounting seat (3-1), and a support rod (5) connected to the support rod (5) is arranged between the fixed seat (2-1) and the mounting seat (3-1). A sliding seat (3-2) is provided, a convex mold (3-3) is fixedly connected to the center of the lower end of the sliding seat (3-2), a hydraulic cylinder (4-3) is fixedly connected inside the mounting seat (3-1), a push column (4-5) is connected inside the hydraulic cylinder (4-3), the lower end of the push column (4-5) is fixedly connected to the sliding seat (3-2), the outer ring of the sealing flange (4-4) is tightly connected to the mounting seat (3-1), and the inner ring is tightly connected to the push column (4-5), a hydraulic pump (4-1) is installed on the base (1), and hydraulic oil is delivered to the hydraulic cylinder (4-3) through the infusion pipe (4-2) to drive the push column (4-5) to press down, a clamping device (6) is also provided on the mounting seat (3-1), the center opening of the clamping device (6) enables the convex mold (3-3) to pass through the opening and contact the concave mold plate (2-2), and both sides of the mounting seat (3-1) are also provided with limit assemblies (7) connected to the sliding seat (3-2).

2. The fine stamping die for motorcycle clutch gear according to claim 1, characterized in that: The clamping device (6) comprises a clamping seat (6-1) and a transition seat (6-2). The two sides of the clamping seat (6-1) are fixed to the side surfaces of the mounting seat (3-1) through clamping plates. The clamping seat (6-1) is provided with a clamping mechanism (8) for fixing the stamping material. The transition seat (6-2) is installed at the lower end of the clamping seat (6-1) and fits with the upper end of the mounting seat (3-1).

3. The fine stamping die for motorcycle clutch gear according to claim 1, characterized in that: The limiting assembly (7) comprises a connecting seat, a columnar cavity, a connecting column and a column head. The connecting seat is fixed at the corners of the mounting seat (3-1) and the sliding seat (3-2) respectively. The columnar cavity is fixed on the connecting seat at the lower end, and the connecting column is fixed on the connecting seat at the upper end. The lower end of the connecting column is placed in the columnar cavity. The column head is slidably connected to the columnar cavity, and the upper end of the column head is fixedly connected to the lower end of the connecting column.

4. The fine stamping die for motorcycle clutch gear according to claim 2, characterized in that: The clamping mechanism (8) comprises a shell (8-1), a top block (8-2), a screw rod (8-3), a spring (8-4) and an adjusting nut (8-5); the shell (8-1) is mounted on the outer contour of the clamping seat (6-1); through holes are provided at the centers of the four sides of the shell (8-1); the screw rod (8-3) is connected in the holes; the inner end surface of the screw rod (8-3) is connected to the top block (8-2); the outer cross section is connected to the adjusting nut (8-5); the spring (8-4) is sleeved on the screw rod (8-3); one end of the spring (8-4) is connected to the top block (8-2); and the other end is connected to the inner wall of the shell (8-1).

5. The fine stamping die for motorcycle clutch gear according to claim 4, characterized in that: The housing (8-1) is also provided with a connecting plate (9) for connecting to the clamping seat (6-1), and a straight slot (10) is provided on the connecting plate (9). The connecting plate (9) is fixed to the clamping seat (6-1) by bolts, and the height position of the connecting plate (9) on the clamping seat (6-1) can be adjusted.

6. The fine stamping die for motorcycle clutch gear according to claim 4, characterized in that: A group of deep grooves (11) are also provided on the outer surface of the top block (8-2).

7. The fine stamping die for motorcycle clutch gear according to claim 2, characterized in that: The inner wall of the transition seat (6-2) is composed of multiple arc sections with smooth transition.

8. The fine stamping die for motorcycle clutch gear according to claim 1, characterized in that: The liquid infusion pipe (4-2) is also provided with a control valve, and the base (1) is also provided with an oil storage tank connected with the liquid infusion pipe (4-2).

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