Stamping die for machining meter point structure of belt pulley

Abstract

The utility model relates to a stamping die for processing a meter point structure of a belt pulley, which comprises an upper die assembly, a lower die assembly and a lower die assembly, the upper die assembly comprises an upper die base, an upper padding plate, an upper clamping plate, an upper stopping plate and an upper stripping plate are sequentially connected below the upper die base from top to bottom, and an upper die plate is sleeved below the upper clamping plate and located on the outer sides of the upper stopping plate and the upper stripping plate at intervals; a plurality of upper stripper inserts are mounted on the upper die base at intervals, and upper die male dies staggered with the upper stripper inserts are mounted in the upper clamping plate; the lower die assembly comprises a lower die base, and a lower cushion plate, a lower clamping plate, a lower stopping plate and a lower stripping plate are sequentially connected to the upper portion of the lower die base from bottom to top. A plurality of lower demolding inserts which are in one-to-one correspondence with and are matched with the upper mold male dies are mounted on the lower mold base at intervals; and lower mold male dies which are in one-to-one correspondence with the upper demolding inserts are arranged above the lower base plate. The device can process and form inner and outer rice dots at the same time, is high in material utilization rate, high in production efficiency and low in cost, and can realize batch production of belt pulleys with rice dots.

Description

TECHNICAL FIELD

[0001] The utility model relates to a belt pulley processing technical field, concretely relates to a stamping die for belt pulley rice point structure processing. BACKGROUND

[0002] The rice point structure of the belt pulley is generally completed through machining center numerical control milling, but because of complete machining, the production rhythm is slow, the material utilization rate is low, the manufacturing cost is high, and through milling, the roughness of the rice point surface is unstable, the milling cutter needs to be frequently replaced, the rice point surface milling has cutting marks, reduces the strength of the rice point, affects the product life, and the belt pulley with inner and outer rice points is more difficult.

[0003] Therefore, the research purpose of the utility model is to design a stamping die for belt pulley rice point structure processing, which can not only simultaneously process and form inner and outer rice points, but also has high material utilization rate, high production efficiency and low cost, and can realize batch production of the belt pulley with rice points. UTILITY MODEL CONTENTS

[0004] In view of the technical problems existing in the prior art, the utility model provides a stamping die for belt pulley rice point structure processing, which can effectively solve the technical problems existing in the prior art.

[0005] The technical scheme of the utility model is:

[0006] A stamping die for belt pulley rice point structure processing comprises:

[0007] An upper die assembly comprises an upper die seat, an upper base plate, an upper clamping plate, an upper stop plate and an upper stripper plate are sequentially connected and arranged from top to bottom below the upper die seat, an upper die plate is sleeved and arranged at the outer side of the upper stop plate and the upper stripper plate below the upper clamping plate, a plurality of upper stripper inserts are installed on the upper die seat in intervals through corresponding upper die green springs and upper clamping inserts, the lower end surface of the upper stripper insert extends to the lower end surface of the upper stripper plate, and a plurality of upper die rice point pins are installed in the upper clamping plate and staggered with the upper stripper inserts.

[0008] A lower die assembly is arranged directly below the upper die assembly and comprises a lower die seat, a lower base plate, a lower clamping plate, a lower stop plate and a lower stripper plate are sequentially connected and arranged from bottom to top above the lower die seat, a plurality of lower stripper inserts corresponding to and compatible with the upper die rice point pins are installed on the lower die seat in intervals through corresponding lower die green springs and lower clamping inserts, the upper end surface of the lower stripper insert extends to the upper end surface of the lower stripper plate, and a plurality of lower die rice point pins corresponding to and compatible with the upper stripper inserts are arranged above the lower base plate.

[0009] The upper stop plate and the upper ejector plate are installed on the upper clamping plate through corresponding upper die isometric screws.

[0010] A rectangular spring is arranged between the upper die seat and the upper stop plate, and one end of the rectangular spring is fixed on the upper die seat and abuts against the upper stop plate after penetrating through the upper base plate and the upper clamping plate.

[0011] The lower stop plate and the lower ejector plate are installed on the lower clamping plate through corresponding lower die isometric screws.

[0012] A nitrogen spring is installed on the lower die seat for upwardly ejecting the lower stop plate and the lower ejector plate, one end of the nitrogen spring is fixed on the lower die seat, and the other end is connected with a top rod abutting against the lower end face of the lower stop plate through a corresponding lower plate.

[0013] The upper die seat is installed below the upper support plate through a plurality of upper supporting feet, and the lower die seat is installed above the lower support plate through a plurality of lower supporting feet.

[0014] The stamping die further comprises a positioning assembly for positioning a petal hole of a workpiece during milling, an upper end of the lower die assembly is provided with a guide column for installing the positioning assembly, the positioning assembly comprises an elastic rubber member which can be sleeved on the outside of the guide column, a petal portion matched with the petal hole is integrally extended and fixed outward around the elastic rubber member, and a plurality of metal sheets are fixedly bonded on the outer surface of the petal portion along the circumferential edge.

[0015] The top of the petal portion is in a semispherical convex shape, and a plurality of holes are arranged in the petal portion from top to bottom; during the pressing of the belt pulley under the action of external pressure, the hole diameter of the holes gradually decreases.

[0016] The top of the lower stop plate of the lower die assembly is further provided with a pipe site penetrating through the top of the lower ejector plate.

[0017] The stamping die has the advantages that:

[0018] 1) The stamping die is used for producing the inner and outer mill point structures, and has the advantages of high material utilization rate, high production efficiency, low cost, batch production of the belt pulley with mill points, avoidance of unstable roughness of the machined mill point surface, avoidance of large roughness and microscopic defects, improvement of the mill point surface hardness and strength performance by plastic forming, reduction of the machining area, improvement of the material utilization rate, great improvement of the production efficiency, and reduction of the mill point manufacturing cost.

[0019] 2) In this invention, the workpiece is placed on the lower ejector plate and positioned by the workpiece's floral arc. The hydraulic press slides down, and the upper ejector plate first contacts the pulley cavity and presses down. After the lower ejector plate descends a certain distance, the upper and lower die dowels contact the pulley spokes and the bottom surface of the cavity, respectively, and continue to press down. After the mold closes, the pulley spokes are subjected to the pressure of the upper die dowel, and the lower ejector acts on the bottom surface of the pulley cavity, working together with the upper die dowel to form the inner dowel of the pulley. The bottom surface of the pulley cavity is subjected to the pressure of the lower die dowel, and the upper ejector acts on the pulley spokes, working together with the lower die dowel to form the outer dowel of the pulley. When the hydraulic press slide rises, the upper die dowel and the upper ejector detach from the pulley under the action of the upper ejector plate, and the lower die dowel and the lower ejector detach from the pulley under the action of the lower ejector plate.

[0020] 3) This utility model achieves synchronous spinning forming of inner and outer rice cakes through the cooperation of upper and lower mold components, improving the accuracy of rice cake processing. It also adds corresponding positioning components. A guide post moves up and down to accommodate corresponding elastic rubber parts. The elastic rubber parts are integrally extended outwards around their perimeter and fixedly connected to petal-shaped sections that match the plum blossom holes. A ring of metal sheets is fixedly adhered to the outer surface of the petal-shaped sections at intervals along their perimeter. The top of the petal-shaped sections is hemispherical and convex, with holes spaced from top to bottom inside. When the hydraulic press presses down, the hemispherical convexity of the petal-shaped sections is pre-pressed and compressed, causing the petal-shaped sections to expand outwards, so that the connected metal sheets abut against the inner wall of the plum blossom holes in the workpiece, achieving initial positioning. Positioning: If a simple rubber part is used for positioning, the rubber part and the inner wall of the workpiece are in flexible contact. In this case, if the size of the quincunx hole of the workpiece is not precise enough, the rubber part is prone to local compression deformation at the first point of contact with the inner wall of the workpiece. Compared with simple rubber part positioning, the metal sheet can ensure rigid contact while dispersing the local force, thereby ensuring the balance of the support force in the quincunx hole. Even if there is a deviation in the processing size of the quincunx hole of the workpiece, it will not affect the subsequent positioning processing of the fin and dynamic balance hole, ensuring the processing accuracy. When further pressed down, after the amount of compression on the elastic rubber part reaches a certain level, the elastic rubber part will have relative rigidity and, together with the metal sheet, can fully tighten and support the quincunx hole of the workpiece.

[0021] The perforated design creates numerous micro-cavities within the elastic rubber component. During the rolling process, vibrations passing through these perforations resonate and dissipate energy, thus reducing vibration during rolling. As the pressure gradually decreases, the resonant frequency within the perforations changes, further enhancing resonance efficiency. Ultimately, the perforations generate heat, consuming the vibration energy generated during stamping. The positioning component not only ensures the positioning of the workpiece during stamping but also provides precision for the grooving.

[0022] 4) The utility model discloses besides through setting correct oil press's parameter to guarantee product size, the cooperation gap of mould and product also has very big influence to product size, and the specific gap between pipe position and product plum blossom hole can effectively guarantee product size, if there is gap too big, then will influence product tooth shape runout and relevant size. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic drawing of the utility model.

[0024] Figure 2 It is the structure schematic drawing of the positioning assembly in the stamping die of the utility model.

[0025] Figure 3 It is Figure 2 cutting schematic drawing.

[0026] Figure 4 It is the structure schematic drawing of the belt pulley prepared by the processing technology of the utility model.

[0027] In the drawing: rectangular spring 1, upper die green spring 2, upper supporting plate 3, upper cushion foot 4, upper die equal height screw 5, upper die seat 6, upper cushion plate 7, upper die millet point public 8, upper clamping plate 9, upper stop plate 10, upper stripping plate 11, upper die plate 12, lower stripping plate 13, lower die equal height screw 14, lower stop plate 15, lower clamping plate 16, lower cushion plate 17, lower die seat 18, lower cushion foot 19, lower beating plate 20, lower supporting plate 21, lower die green spring 22, nitrogen spring 23, lower clamping insert 24, top rod 25, lower die millet point public 26, lower stripping insert I 27, guide column 28, positioning assembly 29, elastic rubber piece 291, petal part 2911, hole 2912, metal sheet 292, pipe position 30, upper stripping insert I 31, upper clamping insert 32, workpiece 33. DETAILED DESCRIPTION

[0028] In order to facilitate the person skilled in the art understanding, now will be described further in detail to the structure of the utility model with the drawings of embodiment:

[0029] Embodiment one

[0030] Reference Figures 1-4 , a kind of stamping die for processing belt pulley millet point structure, comprising:

[0031] The upper die assembly comprises an upper die seat 6, the lower side of the upper die seat 6 is sequentially connected with an upper base plate 7, an upper clamping plate 9, an upper stop plate 10 and an upper stripping plate 11 from top to bottom, the lower side of the upper clamping plate 9 is sleeved with an upper die plate 12 at the outer side of the upper stop plate 10 and the upper stripping plate 11; a plurality of upper stripping sub-pieces 31 are installed on the upper die seat 6 through corresponding upper die green springs 2 and upper clamping sub-pieces 32, the lower end surface of the upper stripping sub-pieces 31 extends to the lower end surface of the upper stripping plate 11, and the upper clamping plate 9 is installed with upper die rice point publics 8 which are staggered with the upper stripping sub-pieces 31;

[0032] The lower die assembly is arranged below the upper die assembly and comprises a lower die seat 18, the upper side of the lower die seat 18 is sequentially connected with a lower base plate 17, a lower clamping plate 16, a lower stop plate 15 and a lower stripping plate from bottom to top, a plurality of lower stripping sub-pieces 27 which are corresponding to and matched with the upper die rice point publics 8 are installed on the lower die seat 18 through corresponding lower die green springs 22 and lower clamping sub-pieces 24, the upper end surface of the lower stripping sub-pieces 27 extends to the upper end surface of the lower stripping plate, and the lower base plate 17 is provided with lower die rice point publics 26 which are corresponding to and matched with the upper stripping sub-pieces 31.

[0033] The stamping die is used for producing the inner and outer rice point structures, the material utilization rate is high, the production efficiency is high, the cost is low, the batch production of the belt pulley with the rice points can be realized, the stamping process is used to replace the milling machine machining process, the unstable roughness of the rice point surface in the machining process is avoided, the roughness and the microscopic defects are caused, the stamping plastic forming is used to improve the hardness and the strength performance of the rice point surface, the machining area is reduced, the material utilization rate is improved, the production efficiency is greatly improved, and the rice point manufacturing cost is reduced.

[0034] The upper stop plate 10 and the upper stripping plate 11 are installed on the upper clamping plate 9 through corresponding upper die equal-height screws 5.

[0035] Rectangular springs 1 are arranged between the upper die seat 6 and the upper stop plate 10 and used for ejecting the upper stop plate 10 and the upper stripping plate 11 downwards, one end of each of the rectangular springs 1 is fixed on the upper die seat 6 and abuts against the upper stop plate 10 after penetrating through the upper base plate 7 and the upper clamping plate 9.

[0036] The lower stop plate 15 and the lower supporting plate 21 are installed on the lower clamping plate 16 through corresponding lower die equal-height screws 14.

[0037] Nitrogen springs 23 are installed on the lower die seat 18 and used for ejecting the lower stop plate 15 and the lower stripping plate upwards, one end of each of the nitrogen springs 23 is fixed on the lower die seat 18, and the other end is connected with a top rod 25 which abuts against the lower end surface of the lower stop plate 15 through a corresponding lower plate 20.

[0038] The upper die holder 6 is supported and installed below the upper supporting plate by several upper pads 4, and the lower die holder 18 is supported and installed above the lower supporting plate 21 by several lower pads 19.

[0039] The workpiece 33 is placed on the lower stripper plate 13 and positioned by the flower-shaped arc of the workpiece 33. The oil press slider is lowered, and the upper stripper plate 11 first contacts the pulley cavity and is pressed down. After the lower stripper plate 13 is lowered by a distance, the upper die point public 8 and the lower die point public 26 respectively contact the pulley spoke surface and the cavity bottom surface and continue to be pressed down. After the mold is closed, the pulley spoke surface is pressed by the upper die point public 8, and the lower stripper insert acts on the pulley cavity bottom surface and realizes the forming of the inner point of the pulley together with the upper die point public 8; the pulley cavity bottom surface is pressed by the lower die point public 26, and the upper stripper insert acts on the pulley spoke surface and realizes the forming of the outer point of the pulley together with the lower die point public 26. When the oil press slider is raised, the upper die point public 8 and the upper stripper insert are separated from the pulley under the action of the upper stripper plate 11, and the lower die point public 26 and the lower stripper insert are separated from the pulley under the action of the lower stripper plate 13.

[0040] The stamping die further comprises a positioning assembly 29 for positioning the workpiece 33 during the processing of the point, and the upper end of the lower die assembly is provided with a guide column 28 for installing the positioning assembly 29. The positioning assembly 29 comprises an elastic rubber piece 291 which can be sleeved on the outside of the guide column 28, and a petal part 2911 adapted to the flower hole is integrally extended and fixed around the outer side of the elastic rubber piece 291. A metal sheet 292 is fixedly bonded to the outer surface of the petal part 2911 along the four circumferential edges.

[0041] The top of the petal part 2911 is in the shape of a hemispherical convex, and a plurality of holes 2912 are arranged inside the petal part 2911 from top to bottom. During the pressing of the pulley under the action of external pressure, the hole diameter of the hole 2912 gradually decreases.

[0042] The utility model discloses a upper die assembly and lower die assembly cooperation realize the synchronous spinning forming of inside and outside rice point, improve the precision of rice point processing, and additionally add corresponding positioning assembly 29, and the corresponding elastic rubber piece 291 of sleeve setting is moved up and down through guide column 28, and the four quarters of elastic rubber piece 291 are integrally extended and fixed with the petal portion 2911 matched with plum blossom hole outward, and the outer surface of petal portion 2911 is fixed and bonded with a circle of metal sheet 292 along the four quarter edges, and the top of petal portion 2911 is in semisphere convex shape, and its inside interval distribution has the hole 2912 set from top to bottom, when oil press presses down, the semisphere convex of petal portion 2911 is pressed in advance and forms extrusion, and then makes petal portion 2911 spread to four quarters and makes its connected metal sheet 292 abut to the inner hole side wall of plum blossom hole of workpiece 33, realizes preliminary positioning, if simple rubber piece positioning is used, the inner side wall of rubber piece and workpiece 33 is flexible contact, in this way, if the size of plum blossom hole of workpiece 33 is not accurate enough, the rubber piece is easy to produce extrusion deformation in the local part of first contacting the inner side wall of workpiece 33, compared with simple rubber piece positioning, and metal sheet 292 can ensure rigid contact while dispersing local stress, and then can ensure the balance degree of support stress in plum blossom hole, even if the processing size of plum blossom hole of workpiece 33 appears deviation, will not affect the positioning processing of subsequent rice point and dynamic balance hole, ensures the precision of processing, when further pressing down, after the extrusion amount of elastic rubber piece 291 reaches a certain degree, elastic rubber piece 291 will have relative rigidity, and cooperate with metal sheet 292 to realize the plum blossom hole of workpiece 33 is all jacked up and supported.

[0043] And the setting of hole 2912 can form many micro-pore accommodation cavities in elastic rubber piece 291, and the workpiece 33 vibrates through hole 2912 during rolling, which will produce resonance energy consumption, thereby reducing the vibration during rolling, when gradually pressing down, with the gradual change of hole 2912, the resonance frequency in hole 2912 changes constantly, the resonance efficiency is more, and finally hole 2912 will heat and consume the vibration energy caused by stamping. Positioning assembly 29 can not only ensure the positioning of workpiece 33 stamping, but also provide the precision of rice point stamping.

[0044] Embodiment two

[0045] Reference Figure 1 The difference between the embodiment and the embodiment one is that the top of the lower stop plate 15 of the lower die assembly is further provided with a pipe site 30 penetrating the top of the lower stripper plate.

[0046] In addition to ensuring the product size by setting the correct parameters of the oil press, the cooperation gap between the mold and the product also has a great influence on the product size. By setting a specific gap between the pipe site 30 and the plum blossom hole of the product, the product size can be effectively ensured. If the gap is too large, it will affect the related sizes such as the tooth profile runout of the product.

[0047] It should be pointed out that the embodiment and the implementation principle of example one and the technical effects are the same, for brief description, the embodiment is not mentioned, and the corresponding content in example one can be referred to.

[0048] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A stamping die for processing the dotted structure of a belt pulley, characterized in that, The utility model relates to a kind of moulding machine, including: Upper die assembly, including upper die seat (6), the lower side of the upper die seat (6) is sequentially connected with upper tie plate (9), upper stop plate (10) and upper stripper (11) from top to bottom, the lower side of the upper tie plate (9) is spaced with upper die plate (12) outside the upper stop plate (10) and upper stripper (11) and is set with sleeve;Several upper stripping sub (31) are installed on the upper die seat (6) by corresponding upper die green spring (2) and upper clamping sub (32) cooperation interval, the lower end surface of the upper stripping sub (31) extends to the lower end surface of upper stripper (11), upper die point male (8) is installed in the upper tie plate (9) and is staggered with the upper stripping sub (31); Lower die assembly, set in the upper die assembly directly below, including lower die seat (18), the upper side of the lower die seat (18) is sequentially connected with lower tie plate (17), lower tie plate (16), lower stop plate (15) and lower stripper;Several lower stripping sub (27) corresponding with the upper die point male (8) and being adapted are installed on the lower die seat (18) by corresponding lower die green spring (22), lower clamping sub (24) interval, the upper end surface of the lower stripping sub (27) extends to the upper end surface of the lower stripper, lower die point male (26) is set on the upper side of the lower tie plate (17) and is corresponding with the upper stripping sub (31) and being adapted.

2. A pulley point structure processing punch press die according to claim 1, characterized by, The upper stop plate (10) and upper stripper (11) are installed on the upper tie plate (9) by corresponding upper die equal-height screw (5).

3. The pulley point structure processing punch press die according to claim 2, characterized in that, The upper die seat (6) and the upper stop plate (10) are provided with a rectangular spring (1) for ejecting the upper stop plate (10) and the upper stripper (11) downward, one end of the rectangular spring (1) is fixed on the upper die seat (6) and abuts against the upper stop plate (10) after penetrating through the upper tie plate (7) and the upper tie plate (9) respectively.

4. The pulley point structure processing punch press die according to claim 3, characterized in that, The lower stop plate (15) and the lower support plate (21) are installed on the lower tie plate (16) by corresponding lower die equal-height screw (14).

5. The pulley point structure processing punch press die according to claim 4, characterized in that, The lower die seat (18) is provided with a nitrogen spring (23) for ejecting the lower stop plate (15) and the lower stripper upward, one end of the nitrogen spring (23) is fixed on the lower die seat (18), and the other end is connected with a top rod (25) abutting against the lower end surface of the lower stop plate (15) through a corresponding lower tie plate (20).

6. The pulley point structure processing punch press die according to claim 1, characterized in that, The upper die seat (6) is supported and installed below the upper support plate (3) by a plurality of upper pads (4), and the lower die seat (18) is supported and installed above the lower support plate (21) by a plurality of lower pads (19).

7. The pulley point structure processing punch press die according to claim 5, characterized in that, The stamping die also comprises a positioning assembly (29) for positioning the star-shaped hole of the workpiece (33) during the milling process, the upper end of the lower die assembly is provided with a guide column (28) for mounting the positioning assembly (29), the positioning assembly (29) comprises an elastic rubber part (291) which can be sleeved on the outside of the guide column (28) up and down, and the periphery of the elastic rubber part (291) is integrally extended and fixed with a petal part (2911) matched with the star-shaped hole, and the outer surface of the petal part (2911) is fixedly bonded with a ring of metal sheets (292) at intervals along the periphery.

8. The pulley point structure processing punch press die according to claim 7, characterized in that, The top of the petal part (2911) is in the shape of a hemispherical convex, and the inside of the petal part (2911) is spaced apart and provided with holes (2912) arranged from top to bottom; during the pressing process of the belt pulley under the action of external pressure, the hole diameter of the holes (2912) gradually decreases.

9. The pulley point structure processing punch press die according to claim 5, characterized in that, The top of the lower stop plate (15) of the lower die assembly is also provided with a pipe site (30) penetrating through the top of the lower stripper plate.

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