A rotary die for manufacturing a pulley

Abstract

The present invention relates to a rotary die for manufacturing a pulley, which comprises a rotary base, a pushing assembly, a slider, a punch and an outer sliding sleeve; the pushing assembly is movably arranged in the inner cavity of the rotary base and is provided with a first inclined surface thereon; the slider is radially movably arranged in a radial through hole of the rotary base, the inner end of the slider abuts against the pushing assembly, the outer end is provided with a second inclined surface and abuts against the outer sliding sleeve; the punch is fixedly connected to the top of the rotary base; the outer sliding sleeve is movably sleeved on the rotary base, and a third inclined surface is arranged on the inner side of the outer sliding sleeve; when used for preforming, a limit is formed among the outer sliding sleeve, the slider and the pushing assembly; when used for tooth part machining, the outer sliding sleeve is located at the highest position and clamps the opening of the pulley, and a limit is formed among the outer sliding sleeve, the slider and the pushing assembly; when the pushing assembly moves upward, the slider is pushed to move outward, and then the outer sliding sleeve is pushed to move upward. The rotary die of the present invention can be used for preforming and tooth part machining of a novel pulley, and has low cost and high production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of pulley manufacturing, and particularly to a rotary die for manufacturing pulleys. Background Art

[0002] As Figure 1 , a pulley with a rim located inside the open end (hereinafter referred to as "new type pulley a") is an important component for the crankshaft drive of new energy vehicles. Compared with the traditional pulley b in terms of structure, since a connecting piece needs to be press-fitted inside its cavity, the cavity is deeper than that of the traditional pulley. To ensure smooth transmission and sufficient rigidity, one side of the rim is at the web position, and the other side of the rim is at a certain distance from the open end face. Due to the need to cooperate with the connecting piece, the opening is required to have sufficient strength. Therefore, the most important thing in the spinning production of this new type of pulley is to tighten the mouth during the forming of the rim on the open side. Otherwise, cracks are likely to occur on the back of the rim, resulting in insufficient strength and defective products.

[0003] The existing new type of pulley is gradually spun from a blank by multiple sets of spinning wheels. The first few sets are for preforming, and the last few sets are for tooth forming. When forming the teeth, it is necessary to tighten the already formed opening during preforming and then perform spinning processing. However, the existing rotary die cannot achieve this function. Therefore, it is impossible to complete both preforming and tooth forming on the existing rotary die, and only two devices can be used for processing: after preforming on the first device, the second device with a fixed outer sleeve that has been pre-installed is used to complete the tooth forming processing. This not only has a high processing cost but also a low processing efficiency. Summary of the Invention

[0004] Therefore, there is a need to provide a rotary die that can be used for both preforming and tooth forming of new type pulleys to solve the problems of high cost and low efficiency of the existing rotary die for processing new type pulleys.

[0005] To achieve the above object, the inventor provides a rotary die for manufacturing a pulley, comprising a rotary base, a pushing assembly, a slider, a punch and an outer sliding sleeve; the rotary base has an inner cavity, and a radial through hole communicating with the inner cavity is formed on the rotary base; the pushing assembly is axially movable and arranged in the inner cavity, and a first inclined surface is provided on the pushing assembly; the slider is radially movable and penetrates through the radial through hole, the inner end of the slider abuts against the pushing assembly, the outer end abuts against the outer sliding sleeve, and a second inclined surface is provided at the outer end of the slider; the punch is fixedly connected to the top of the rotary base; the outer sliding sleeve is axially movable and sleeved on the rotary base, and a third inclined surface adapted to the second inclined surface is provided on the inner side of the outer sliding sleeve; when used for preforming, the outer sliding sleeve does not clamp the pulley, the first inclined surface abuts against the inner end of the slider, the second inclined surface abuts against the third inclined surface, and the outer sliding sleeve, the slider and the pushing assembly abut against each other to form a limit; when used for tooth part processing, the outer sliding sleeve is at the highest position and clamps the opening of the pulley, the pushing assembly abuts against the inner end of the slider, the second inclined surface abuts against the third inclined surface, and the outer sliding sleeve, the slider and the pushing assembly abut against each other to form a limit; during the process of the pushing assembly moving upward from the position when used for preforming, the first inclined surface continuously abuts against the inner end of the slider to push the slider to move outward, and the second inclined surface continuously abuts against the third inclined surface to further push the outer sliding sleeve to move upward to the position when used for tooth part processing.

[0006] Preferably, a blanking assembly is further included, and the blanking assembly comprises an inner sliding sleeve, a blanking top plate and a blanking rod; the inner cavity comprises an upper cavity and a lower cavity, and the inner diameter of the lower cavity is larger than that of the upper cavity; the inner sliding sleeve is axially movable and sleeved on the rotary base outside the upper cavity and is located above the lower cavity; the outer sliding sleeve is sleeved outside the inner sliding sleeve; the blanking top plate is axially movable and arranged in the lower cavity; the blanking rod is axially movable and penetrates through the upper cavity wall of the lower cavity, one end of the blanking rod is fixedly connected to the blanking plate, and the other end is fixedly connected to the inner sliding sleeve; the first inclined surface is located in the upper cavity; during the process of the pushing assembly continuing to move upward from the position when used for tooth part processing, the pushing assembly drives the blanking top plate to move upward, thereby driving the inner sliding sleeve to move upward to eject the pulley.

[0007] Preferably, the rotating seat has an upper seat, a middle seat, and a lower seat; a radial through hole is formed at the bottom of the upper seat, and a first chamber is formed inside the upper seat; a second chamber is formed inside the middle seat, and the middle seat extends outward relative to the upper seat to form a receiving platform; the first chamber and the second chamber together constitute the upper chamber; a third chamber is formed in the lower seat, and the third chamber constitutes the lower chamber; the inner sliding sleeve is sleeved on the upper seat, and an avoidance groove for accommodating the slider is formed at the bottom of the inner sliding sleeve. During preforming, the lower end of the inner sliding sleeve is supported on the receiving platform; an axial through hole communicating with the third chamber is formed in the receiving platform, and the unloading rod is axially movably inserted into the axial through hole; the slider is placed on the receiving platform; the punch is fixedly connected to the top of the upper seat.

[0008] Preferably, the slider is a long wedge block, the outer end of the long wedge block is inclined to form the second inclined surface, and the outer end is vertically designed to form the first vertical surface; the pushing assembly includes a push rod and a taper sleeve; the taper sleeve is fixedly connected to the push rod, the outer periphery of the upper end of the taper sleeve is inclined to form the first inclined surface, and the first inclined surface is vertically designed downward to form the second vertical surface adapted to the first vertical surface; during tooth part processing, the first vertical surface abuts against the second vertical surface.

[0009] Preferably, an inner tapered cavity is provided inside the outer sliding sleeve, and the inner tapered surface of the cavity wall of the inner tapered cavity forms the third inclined surface.

[0010] Preferably, the upper part of the taper sleeve is a frustum of a cone and the lower part is a cylinder; the outer tapered surface of the frustum of the cone forms the first inclined surface, and the outer side surface of the cylinder forms the second vertical surface; the first vertical surface is an arc surface adapted to the outer side surface of the cylinder; the lower chamber is a cylindrical chamber and is adapted to the size of the cylinder, so that the taper sleeve can move inside the lower chamber and the wall of the lower chamber can limit the taper sleeve.

[0011] Preferably, the bottom end of the slider is a flat surface; the radial through hole is adapted to the shape and size of the slider so that the slider can slide inside the radial through hole and the wall of the radial through hole can limit the slider.

[0012] Preferably, the slider is a rectangular wedge block, and the edges of the rectangular wedge block and the inner end of the slider abutting against the lower edge of the taper sleeve are designed with arc transitions.

[0013] Preferably, a discharge pushing portion extends outward from the lower end of the push rod; the discharge top plate has a mounting hole, and the discharge top plate is sleeved above the push rod through the mounting hole, and the push rod can move axially in the mounting hole; the inner side of the upper end of the inner sliding sleeve abuts against the outer side of the punch; when used for preforming and when used for tooth portion machining, the discharge pushing portion does not abut against the discharge top plate, and the discharge assembly is in a state of waiting for discharging; during the process that the pushing assembly continues to move upward from the position when used for tooth portion machining, the discharge pushing portion continuously abuts against the discharge top plate and drives the discharge top plate to move upward, thereby driving the inner sliding sleeve to move upward to eject the pulley.

[0014] Preferably, the rotating seat, the pushing assembly, the punch, the outer sliding sleeve, the inner sliding sleeve and the discharge top plate are all circular axisymmetric bodies arranged coaxially.

[0015] The rotating die of the present invention can be used for preforming and tooth portion machining of a new pulley at the same time, and can realize the spinning work of each set of spinning wheels of each new pulley on one device, with low cost and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of a new pulley and a traditional pulley of the present application;

[0018] Figure 2 It is an exploded view of a rotating die of an embodiment of the present application;

[0019] Figure 3 It is a top view schematic diagram of a rotating die of an embodiment of the present application;

[0020] Figure 4 It is a sectional view schematic diagram of a rotating die of an embodiment of the present application when used for preforming;

[0021] Figure 5 It is a sectional view schematic diagram of a rotating die of an embodiment of the present application after completing preforming;

[0022] Figure 6 It is a sectional view schematic diagram of a rotating die of an embodiment of the present application when used for tooth portion machining;

[0023] Figure 7 It is a sectional view schematic diagram of a rotating die of an embodiment of the present application after completing tooth portion machining;

[0024] Figure 8 This is a schematic cross-sectional view of a rotary die after discharging in an embodiment of the present application.

[0025] Explanation of reference numerals:

[0026] 100, rotary base; 110, upper base; 111, first chamber; 112, radial perforation; 120, middle base; 121, second chamber; 122, accommodating platform; 123, axial perforation; 130, lower base; 131, third chamber; 200, pushing assembly; 210, push rod; 211, discharging push portion; 220, taper sleeve; 221, first inclined surface; 222, second vertical surface; 300, slider; 310, second inclined surface; 320, first vertical surface; 400, punch; 500, outer sliding sleeve; 510, third inclined surface; 600, inner sliding sleeve; 610, avoidance groove; 700, discharging top plate; 710, mounting hole; 800, discharging rod. Detailed implementation manners

[0027] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] The present invention provides a rotary die for manufacturing a pulley. Please refer to Figures 2 to 8 :

[0029] A rotary die for manufacturing a pulley, comprising a rotary base 100, a pushing component 200, a slider 300, a punch 400 and an outer sliding sleeve 500; the rotary base 100 has an inner cavity, and the rotary base 100 is provided with a radial through hole 112 communicating with the inner cavity; the pushing component 200 is axially movable and arranged in the inner cavity, and the pushing component 200 is provided with a first inclined surface 221; the slider 300 is radially movable and penetrates through the radial through hole 112, the inner end of the slider 300 abuts against the pushing component 200, and the outer end abuts against the outer sliding sleeve 500. The outer end of the slider 300 is provided with a second inclined surface 310; the punch 400 is fixedly connected to the top of the rotary base 100; the outer sliding sleeve 500 is axially movable and sleeved on the rotary base 100, and the inner side of the outer sliding sleeve 500 is provided with a third inclined surface 510 adapted to the second inclined surface 310; when preforming, the outer sliding sleeve 500 has not yet tightened the pulley, the first inclined surface 221 abuts against the inner end of the slider 300, the second inclined surface 310 abuts against the third inclined surface 510, and the outer sliding sleeve 500, the slider 300 and the pushing component 200 abut against each other to form a limit; when machining the tooth part, the outer sliding sleeve 500 is at the highest position and tightens the opening of the pulley, the pushing component 200 abuts against the inner end of the slider 300, the second inclined surface 310 abuts against the third inclined surface 510, and the outer sliding sleeve 500, the slider 300 and the pushing component 200 abut against each other to form a limit; during the process of the pushing component 200 moving upward from the position during preforming, the first inclined surface 221 continuously abuts against the inner end of the slider 300 to push the slider 300 to move outward, and the second inclined surface 310 continuously abuts against the third inclined surface 510 to further push the outer sliding sleeve 500 to move upward to the position during tooth part machining. The rotary die of this embodiment can be used for both preforming and tooth part machining of the pulley, and can realize the spinning work of each group of spinning wheels of various new pulleys on one device, with low cost and high production efficiency.

[0030] Specifically, the rotary die of this embodiment further includes a blanking component, and the blanking component includes an inner sliding sleeve 600, a blanking top plate 700 and a blanking rod 800; the inner cavity includes an upper cavity and a lower cavity, and the inner diameter of the lower cavity is larger than that of the upper cavity; the inner sliding sleeve 600 is axially movable and sleeved on the rotary base 100 outside the upper cavity and is located above the lower cavity; the outer sliding sleeve 500 is sleeved outside the inner sliding sleeve 600; the blanking top plate 700 is axially movable and arranged in the lower cavity; the blanking rod 800 is axially movable and penetrates through the upper cavity wall of the lower cavity. One end of the blanking rod 800 is fixedly connected to the blanking plate, and the other end is fixedly connected to the inner sliding sleeve 600; the first inclined surface 221 is located in the upper cavity; during the process of the pushing component 200 continuing to move upward from the position during tooth part machining, the pushing component 200 drives the blanking top plate 700 to move upward, thereby driving the inner sliding sleeve 600 to move upward and ejecting the pulley. The setting of the blanking component can realize automatic blanking and higher production efficiency.

[0031] Specifically, the rotating base 100 of this embodiment includes an upper base 110, a middle base 120, and a lower base 130; a radial through hole 112 is provided at the bottom of the upper base 110, and a first chamber 111 is provided inside the upper base 110; a second chamber 121 is provided inside the middle base 120, and the middle base 120 extends outward relative to the upper base 110 to form a receiving platform 122; the first chamber 111 and the second chamber 121 together form an upper chamber; the lower base 130 is provided with a third chamber 131, and the third chamber 131 forms a lower chamber; the inner sliding sleeve 600 is sleeved on the upper base 110, and an avoidance groove 610 for accommodating the slider 300 is provided at the bottom of the inner sliding sleeve 600. During preforming, the lower end of the inner sliding sleeve 600 is supported on the receiving platform 122; an axial through hole 123 communicating with the third chamber 131 is provided on the receiving platform 122, and the unloading rod 800 is axially movably inserted into the axial through hole 123; the slider 300 is placed on the receiving platform 122; the punch 400 is fixedly connected to the top of the upper base 110. The lower end of the lower base 130 of this embodiment further extends outward to form a connecting portion for connecting with a rotary driving device. Four evenly distributed radial through holes 112 are provided at the bottom of the upper base 110 of this embodiment; four avoidance grooves 610 are correspondingly provided at the bottom of the inner sliding sleeve 600; four unloading rods 800 are provided in this embodiment, and four evenly arranged axial through holes 123 are provided on the receiving platform 122. The shape and size of the axial through holes 123 are adapted to the unloading rods 800, so that the unloading rods 800 can move in the rod holes and the hole walls of the rod holes can limit the unloading rods 800.

[0032] Specifically, the slider 300 of this embodiment is a long wedge block. The outer end of the long wedge block is inclined to form a second inclined surface 310, and the outer end is vertically designed to form a first vertical surface 320; the pushing assembly 200 includes a push rod 210 and a taper sleeve 220; the taper sleeve 220 is fixedly connected to the push rod 210. The outer periphery of the upper end of the taper sleeve 220 is inclined to form a first inclined surface 221, and the first inclined surface 221 is vertically designed downward to form a second vertical surface 222 adapted to the first vertical surface 320; during tooth part machining, the first vertical surface 320 abuts against the second vertical surface 222. Four positions for long wedge blocks are provided in this embodiment, and the taper sleeve 220 of this embodiment is fixedly connected to the push rod 210 by bolts. When the first vertical surface 320 abuts against the second vertical surface 222, the wedge block and the taper sleeve 220 generate unilateral self-locking, and the outer sliding sleeve 500 is locked at this height and will not drop under the influence of external forces, and the structure is more stable.

[0033] Specifically, an inner taper cavity is provided inside the outer sliding sleeve 500 of this embodiment, and the inner taper surface of the inner taper cavity wall forms a third inclined surface 510. The inner taper surface of the inner taper cavity forms a third inclined surface 510 adapted to the second inclined surface 310 in all directions, eliminating the need to specifically adjust the angle to align with the slider 300, making the assembly simpler and the structure more stable.

[0034] Specifically, above the taper sleeve 220 of this embodiment is a frustum of a cone and below is a cylinder; the outer conical surface of the frustum of a cone forms the first inclined surface 221, and the outer side surface of the cylinder forms the second vertical surface 222; the first vertical surface 320 is an arc surface adapted to the outer side surface of the cylinder; the lower cavity is a cylindrical cavity and is adapted to the size of the cylinder, so that the taper sleeve 220 can move in the lower cavity and the wall of the lower cavity can limit the taper sleeve 220. The outer conical surface of the frustum of a cone forms the first inclined surface 221 in all directions, without the need to specifically adjust the angle to align with the slider 300, making the assembly simpler and the structure more stable.

[0035] Specifically, the slider 300 of this embodiment is a rectangular strip-shaped wedge block with a flat bottom, and the edge of the rectangular strip-shaped wedge block and the inner end of the slider 300 abut against the lower edge of the taper sleeve 220 with an arc transition design; the radial through-hole 112 is adapted to the shape and size of the slider 300 so that the slider 300 can slide in the radial through-hole 112 and the wall of the radial through-hole 112 can limit the slider 300.

[0036] Specifically, the lower end of the push rod 210 of this embodiment extends outward to form a blanking pushing portion 211; the blanking top plate 700 has a mounting hole 710, and the blanking top plate 700 is sleeved above the push rod 210 through the mounting hole 710, and the push rod 210 can move axially in the mounting hole 710; the inner side of the upper end of the inner sliding sleeve 600 abuts against the outer side of the punch 400; during preforming and tooth processing, the blanking pushing portion 211 does not abut against the blanking top plate 700, and the blanking assembly is in a state of waiting for blanking; during the process of the pushing assembly 200 continuing to move upward from the position during tooth processing, the blanking pushing portion 211 continuously abuts against the blanking top plate 700 and drives the blanking top plate 700 to move upward, thereby driving the inner sliding sleeve 600 to move upward to eject the pulley. The inner side of the upper end of the inner sliding sleeve 600 of this embodiment always abuts against the outer side of the punch 400, and the structure is relatively stable. In other embodiments, the blanking top plate 700 can also be fixed to the push rod 210, but in this case, the blanking top plate 700 will move synchronously with the push rod 210. During the process of the push rod 210 moving from the position during preforming to the position during tooth processing, it will drive the inner sliding sleeve 600 to move upward. Therefore, during preforming, the upper end of the inner sliding sleeve 600 must be kept at a sufficient distance from the pulley, and the structure is relatively less stable.

[0037] Specifically, in this embodiment, the rotating seat 100, the pushing assembly 200, the punch 400, the outer sliding sleeve 500, the inner sliding sleeve 600, and the blanking top plate 700 are all circular axisymmetric bodies arranged coaxially. Circular axisymmetric bodies are easy to manufacture, install, and operate.

[0038] The slope of the first inclined surface 221 in this embodiment is 60°, and the slopes of the second inclined surface 310 and the third inclined surface 510 are 45°.

[0039] The rotary mold for manufacturing a pulley of the present embodiment can be installed on a rotary and axially movable driving device to form a device for manufacturing a new type of pulley, for example, the rotary seat 100 is fixedly connected to the rotary shaft of the rotary driving device, and the push rod 210 is fixedly connected to the driving shaft of the axially movable driving device. The processing principle of the rotary mold for manufacturing a pulley of the present embodiment is as follows:

[0040] like Figure 4 During the preforming process, the outer sleeve 500, the slider 300 and the push assembly 200 are mutually pressed against each other to form a stable state, the new belt pulley blank is installed on the punch 400, and the rotary drive device drives the rotating seat 100 to rotate, thereby driving the entire set of molds to rotate, and cooperate with other preforming processing molds to pre-process the new belt pulley blank to form a preformed new belt pulley, such as Figure 5 .

[0041] like Figure 6 After the pre-processing is completed, the axial movement driving device drives the push rod 210 to move upward, and the push rod 210 drives the tapered sleeve 220 to move upward. During the upward movement of the tapered sleeve 220, the first inclined surface 221 continuously presses against the inner end of the slider 300 and pushes the slider 300 to move outward, and the second inclined surface 310 continuously presses against the third inclined surface 510 to push the outer sliding sleeve 500 to move upward, gradually tightening the opening of the new pulley; when the tapered sleeve 220 rises to a certain height, the first inclined surface 221 no longer presses against the inner end of the slider 300, and the second vertical surface 222 starts to press The outer sleeve 500 is locked at this height and does not drop down due to external forces, thus forming a stable state. At this point, the tooth processing can begin.

[0042] During the tooth processing, the rotary drive device drives the rotary seat 100 to rotate, thereby driving the entire set of molds to rotate, and cooperates with other tooth processing molds to process the teeth of the preformed new belt pulley to form a new belt pulley, such as Figure 7 .

[0043] like Figure 8 After the tooth processing is completed, the axial movement driving device drives the push rod 210 to continue to move upward, and the unloading pushing part 211 begins to push against the unloading top plate 700 and drives the unloading top plate 700 to move upward, thereby driving the inner sliding sleeve 600 to move upward. The inner sliding sleeve 600 pushes upward against the processed new pulley and pushes it out of the punch 400 to complete the unloading.

[0044] After the discharging is completed, the push rod 210 resets and drives the inner conical sleeve to move downward. The inner conical sleeve drives the discharging top plate 700 to move downward, and the pushing assembly 200 and the discharging assembly return to the positions during preformed processing. The outer sliding sleeve 500 moves downward by relying on gravity or external force and returns to the position during preformed processing.

[0045] The rotary die of the present invention can be used for the preforming and tooth part processing of the new pulley at the same time, and can realize the spinning work of each set of spinning wheels of each new pulley on one device, with low cost and high production efficiency.

[0046] It should be noted that although the above embodiments have been described in this text, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications made to the embodiments described in this text, or the equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the protection scope of the present invention patent.

Claims

1. A rotary die for manufacturing a pulley, characterized in that, It includes a rotating seat (100), a pushing component (200), a slider (300), a punch (400) and an outer sliding sleeve (500); the rotating seat (100) has an inner cavity, and a radial through-hole (112) communicating with the inner cavity is formed on the rotating seat (100); the pushing component (200) is axially movable and arranged in the inner cavity, and a first inclined surface (221) is provided on the pushing component (200); the slider (300) is radially movable and penetrates through the radial through-hole (112), the inner end of the slider (300) abuts against the pushing component (200), and the outer end abuts against the outer sliding sleeve (500), and a second inclined surface (310) is provided at the outer end of the slider (300); the punch (400) is fixedly connected to the top of the rotating seat (100); the outer sliding sleeve (500) is axially movable and sleeved on the rotating seat (100), and a third inclined surface (510) adapted to the second inclined surface (310) is provided on the inner side of the outer sliding sleeve (500); when used for preforming, the outer sliding sleeve (500) does not clamp the pulley, the first inclined surface (221) abuts against the inner end of the slider (300), the second inclined surface (310) abuts against the third inclined surface (510), and the outer sliding sleeve (500), the slider (300) and the pushing component (200) abut against each other to form a limit; when used for tooth part processing, the outer sliding sleeve (500) is at the highest position and clamps the opening of the pulley, the pushing component (200) abuts against the inner end of the slider (300), the second inclined surface (310) abuts against the third inclined surface (510), and the outer sliding sleeve (500), the slider (300) and the pushing component (200) abut against each other to form a limit; during the process of the pushing component (200) moving upward from the position when used for preforming, the first inclined surface (221) continuously abuts against the inner end of the slider (300) to push the slider (300) to move outward, and the second inclined surface (310) continuously abuts against the third inclined surface (510) to further push the outer sliding sleeve (500) to move upward to the position when used for tooth part processing; The slider (300) is a long wedge block, the outer end of the long wedge block is inclined to form the second inclined surface (310), and the outer end is vertically designed to form a first vertical surface (320); the pushing component (200) includes a push rod (210) and a taper sleeve (220); the taper sleeve (220) is fixedly connected to the push rod (210), the outer periphery of the upper end of the taper sleeve (220) is inclined to form the first inclined surface (221), and the first inclined surface (221) is vertically designed downward to form a second vertical surface (222) adapted to the first vertical surface (320); when used for tooth part processing, the first vertical surface (320) abuts against the second vertical surface (222); An inner taper cavity is provided in the outer sliding sleeve (500), and the inner taper surface of the cavity wall of the inner taper cavity forms the third inclined surface (510); The slider (300) is a rectangular wedge block, and the edge of the rectangular wedge block and the inner end of the slider (300) abut against the lower edge of the taper sleeve (220) with an arc transition design.

2. The rotary die for manufacturing a pulley according to claim 1, characterized in that, It further includes a blanking assembly, and the blanking assembly includes an inner sliding sleeve (600), a blanking top plate (700) and a blanking rod (800); the inner cavity includes an upper cavity and a lower cavity, and the inner diameter of the lower cavity is larger than that of the upper cavity; the inner sliding sleeve (600) is axially movable and sleeved on the rotating seat (100) outside the upper cavity and is located above the lower cavity; the outer sliding sleeve (500) is sleeved outside the inner sliding sleeve (600); the blanking top plate (700) is axially movable and arranged in the lower cavity; the blanking rod (800) is axially movable through the upper cavity wall of the lower cavity, one end of the blanking rod (800) is fixedly connected to the blanking top plate (700), and the other end is fixedly connected to the inner sliding sleeve (600); the first inclined surface (221) is located in the upper cavity; during the process that the pushing assembly (200) continues to move upward from the position for tooth machining, the pushing assembly (200) drives the blanking top plate (700) to move upward, thereby driving the inner sliding sleeve (600) to move upward and ejecting the pulley.

3. A rotary die for manufacturing a pulley according to claim 2, wherein, The rotating seat (100) has an upper seat (110), a middle seat (120) and a lower seat (130); a radial through hole (112) is opened at the bottom of the upper seat (110), and a first chamber (111) is opened inside the upper seat (110); a second chamber (121) is opened inside the middle seat (120), and the middle seat (120) extends outward relative to the upper seat (110) to form a receiving platform (122); the first chamber (111) and the second chamber (121) together form the upper cavity; a third chamber (131) is opened in the lower seat (130), and the third chamber (131) forms the lower cavity; the inner sliding sleeve (600) is sleeved on the upper seat (110), and an avoidance groove (610) for accommodating the slider (300) is opened at the bottom of the inner sliding sleeve (600). During preforming machining, the lower end of the inner sliding sleeve (600) is supported on the receiving platform (122); an axial through hole (123) communicating with the third chamber (131) is opened on the receiving platform (122), and the blanking rod (800) is axially movable and inserted in the axial through hole (123); the slider (300) is placed on the receiving platform (122); the punch (400) is fixedly connected to the top of the upper seat (110).

4. A rotary die for manufacturing a pulley according to claim 3, characterized in that, Above the taper sleeve (220) is a frustum of a cone and below is a cylinder; the outer conical surface of the frustum of the cone forms the first inclined surface (221), and the outer side surface of the cylinder forms the second vertical surface (222); the first vertical surface (320) is an arc surface adapted to the outer side surface of the cylinder; the lower cavity is a cylindrical cavity and is adapted to the size of the cylinder, so that the taper sleeve (220) can move in the lower cavity and the wall of the lower cavity can limit the taper sleeve (220).

5. A rotary die for manufacturing a pulley according to claim 3, characterized in that, The bottom end of the slider (300) is a plane; the radial through-hole (112) is adapted to the shape and size of the slider (300) so that the slider (300) can slide in the radial through-hole (112) and the wall of the radial through-hole (112) can limit the slider (300).

6. A rotary die for manufacturing a pulley according to any one of claims 2-5, characterized in that, The lower end of the push rod (210) extends outward to form a blanking push portion (211); the blanking top plate (700) has a mounting hole (710), and the blanking top plate (700) is sleeved above the push rod (210) through the mounting hole (710), and the push rod (210) can move axially in the mounting hole (710); the inner sliding sleeve (600) abuts against the outer side of the punch (400) at the upper end inside; during pre-forming processing and during tooth part processing, the blanking push portion (211) does not abut against the blanking top plate (700), and the blanking assembly is in a state of waiting for blanking; during the process of the pushing assembly (200) continuing to move upward from the position during tooth part processing, the blanking push portion (211) continuously abuts against the blanking top plate (700) and drives the blanking top plate (700) to move upward, thereby driving the inner sliding sleeve (600) to move upward to eject the pulley.

7. A rotary die for manufacturing a pulley according to claim 6, characterized in that, The rotary seat (100), the pushing assembly (200), the punch (400), the outer sliding sleeve (500), the inner sliding sleeve (600) and the blanking top plate (700) are all circular axisymmetric bodies arranged coaxially.

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