Timing signal spinning pulley and manufacturing method thereof

Abstract

A timing signal spun pulley and a manufacturing method thereof, the timing signal spun pulley comprises a spun pulley body, the spun pulley body comprises a cylindrical body, the outer surface of the cylindrical body is a toothed surface matched with a timing belt, one end of the cylindrical body is a mounting web, the other end of the cylindrical body is connected to an outer circular plane web, the outer circular plane web comprises a transition web located in the middle, a circle of timing signal teeth placed around the edge of the transition web, and the outer circle of the outer circular plane web is bent to form a flange. The manufacturing method is to draw, spin, stamp and shear a cold-rolled thin steel plate. The pulley has light weight, high strength, high production efficiency and low cost, and the timing signal working surface is redesigned, and the timing signal working surface area is increased through the flanging process.

Description

Technical Field

[0001] The invention belongs to the field of automobile engine crankshaft pulleys and relates to a timing signal spinning pulley and a manufacturing method thereof. Background Art

[0002] At present, with the upgrading of automobile exhaust emission standards, the emission requirements for fuel vehicles are getting higher and higher. Electronic fuel injection vehicles have completely replaced traditional carburetor vehicles. The timing signal electronic fuel injection system is the most favored and most commonly used control system by the OEM because of its precise control of the fuel injection amount. Before the timing signal spinning pulley, this type of pulley was generally machined from a steel blank. This method is relatively traditional and mainly involves turning, milling, and drilling. Because it is a chip removal process, in order to prevent deformation during processing, the parts require a larger wall thickness and more materials. In addition, the machining of the multi-V belt pulley tooth profile and the drilling and milling of the outer cylindrical signal teeth have low processing efficiency. Due to consumables and time-consuming production, the cost of timing signal machines plus pulleys has remained high. This type of pulley has a large deadweight, resulting in excessive hanging weight at the end of the crankshaft, which can easily cause engine shaking.

[0003] On the other hand, this type of pulley has a timing signal working surface composed of the tooth head end faces of each timing signal tooth and a timing signal groove, and the tooth head end faces of the timing signal teeth are small. During use, the sensor cannot sense the signal, resulting in the defect that the timing signal electronic injection system does not spray oil. Summary of the invention

[0004] The present invention solves the drawbacks of the current timing signal machine plus pulley, which has large mass and high cost, and provides a timing signal spinning pulley, redesigns the timing signal working surface, increases the timing signal working surface area through the flanging process, reduces cost and increases processing efficiency.

[0005] Another object of the present invention is to provide a method for manufacturing a timing signal spinning pulley.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A timing signal spun pulley includes a spun pulley body, the spun pulley body includes a cylindrical body, the outer surface of the cylindrical body is a toothed surface matched with a timing belt, one end of the cylindrical body is a mounting web, the other end of the cylindrical body is connected to an outer circular plane web, the outer circular plane web includes a transition web located in the middle, a circle of timing signal teeth placed around the edge of the transition web, a timing signal hole / groove is between two adjacent timing signal teeth, and the outer circle of the outer circular plane web is bent to form a flange. The outer surface of the flange is a timing signal working surface.

[0008] If the bending position of the outer ring of the outer circular plane web is located in the middle of the timing signal tooth, the middle of each timing signal tooth is bent, and the partial outer surface of each timing signal tooth located on the flange and the partial outer surface of each timing signal hole / slot located on the flange form a cylindrical timing signal working surface;

[0009] If the bending position of the outer ring of the outer circular plane web is located on the transition web, each timing signal tooth is not bent, and the entire outer surface of each timing signal tooth and each timing signal hole / slot constitute a cylindrical timing signal working surface; the root of each timing signal tooth is located on the flange or at the connection between the flange and the outer circular plane web or on the outer circular plane web, and the tooth head of each timing signal tooth is located on the flange. The flange is arranged along the outer circumference of the annular disk. The transition web is an inclined transition web.

[0010] When there is a timing signal groove between two adjacent timing signal teeth, the tooth head of each timing signal tooth is connected to the annular reinforcement rib to form a closed structure. Due to the existence of the large timing signal hole, the timing signal working surface is irregular, and the outermost end is a circular reinforcement rib to prevent the irregular signal hole working surface from being deformed due to uneven force.

[0011] The timing signal holes / slots include a plurality of small timing signal holes / slots and a large timing signal hole or slot, and deduplication holes are provided on the transition width plate corresponding to the large timing signal holes or slots.

[0012] The mounting web is in a plane shape, with a central portion convex outward or concave inward, and has central positioning holes, bolt holes, and heat dissipation and weight reduction holes distributed from the inside to the outside.

[0013] A timing signal spinning pulley, which is composed of five sections connected in sequence: a flat mounting plate, a flat transition width plate, a multi-ribbed belt wheel tooth surface, an inclined transition width plate, and a timing signal working surface to form a whole; the flat mounting plate and the flat transition width plate form a mounting width plate; the flat mounting plate is circular, and has mounting holes on the flat mounting plate, the mounting holes include a central positioning hole, a plurality of bolt holes distributed around the central positioning hole, and a waist-shaped pin hole, the center of the flat mounting plate is the central positioning hole, and a waist-shaped pin hole is provided at a certain distance from the central positioning hole, and a certain number of bolt holes are evenly distributed on a certain pitch circle within its plane range, and the center of the pitch circle coincides with the center of the center hole. The plane transition plate is in the shape of a ring. The outer circumference of the plane mounting plate is connected to the inner circumference of the plane transition plate. A circle of waist-shaped heat dissipation and weight reduction holes are evenly distributed in the middle of the plane transition plate. Arrow marks are embossed in the middle of two of the heat dissipation and weight reduction holes. The outer circumference of the plane transition plate is connected to one end of the multi-wedge belt toothed surface. The multi-wedge belt toothed surface is a cylindrical surface. A circle of teeth is evenly distributed on the outer circle of the cylindrical surface. The other end of the multi-wedge belt toothed surface is connected to the small end of the conical surface of the inclined transition plate. The inclined transition plate is conical. There are several weight reduction holes at a certain position in the middle of the inclined transition plate. The large end of the conical surface of the inclined transition plate is connected to one end of the timing signal working surface. The other end of the timing signal working surface is a ring reinforcement rib. The timing signal working surface is cylindrical and consists of multiple signal units. One timing signal tooth and one timing signal hole / groove constitute one signal unit. The timing signal teeth are neatly distributed on the surface of the timing signal working surface. All the above connections are smooth transition connections.

[0014] The center positioning hole and waist-shaped pin hole are used for positioning during the production process and assembly of finished workpieces; the bolt hole is used to transmit torque after installation; the heat dissipation and weight reduction hole is used for heat dissipation and weight reduction; the arrow mark is used to indicate the starting position of the pulley during assembly; the multi-ribbed belt tooth shape is used for the transmission of kinetic energy between belts; the deweighting hole is used to remove weight to ensure that the rotational inertia of the pulley is small when rotating; the small timing signal hole and the large timing signal hole are based on the principle of cutting magnetic flux lines. When the pulley rotates, each rotation cycle triggers the sensor to release a complete timing signal to control the fuel injection of the engine. The center positioning hole and waist-shaped pin hole have a precise relative position relationship with the bolt hole, waist-shaped hole, arrow mark, deweighting hole, small timing signal hole, and large timing signal hole.

[0015] The tooth root of each timing signal tooth is located on the inclined transition plate or on the timing signal working surface.

[0016] A method for manufacturing a timing signal spinning pulley, the method is to form a timing signal spinning pulley by drawing, spinning, stamping and shearing a cold-rolled thin steel plate, comprising the following steps:

[0017] A. Blanking: The cold-rolled thin steel plate is punched into round cakes through a blanking process. The diameter of the round cake is Wherein, the finished product volume V2 of the timing signal spinning pulley is known, the thickness t of the round cake material is known, and the volume V1 of the round cake material = the finished product volume V2 of the timing signal spinning pulley;

[0018] B. Drawing: The cake is drawn on a stretching device to form a cylinder with an outer circular flat plate, with one end of the cylinder being the mounting plate;

[0019] C. Edge turning: trim the outer circular flat plate and turn the outer circle of the outer circular flat plate neatly;

[0020] D. Spinning: Processing the multi-ribbed belt wheel tooth shape on the outer circle of the cylinder;

[0021] E. Punching holes / grooves: Punch mounting holes on the mounting plate, and punch timing signal holes / grooves on the outer circular plane plate near the outer circle to form timing signal teeth; the mounting holes include a center positioning hole, a waist-shaped pin hole, and a bolt hole; the width of the timing signal tooth a3=a2=πd1 / N-a1, where the width a1 of the signal hole of the timing signal pulley and the outer diameter d1 of the timing signal pulley are known, and the number of timing signal teeth N on the timing signal pulley is equal to the number of punched timing signal holes / grooves;

[0022] F. Flanging: The outer ring of the outer circular flat plate is bent to form a cylindrical flange, and part or all of the timing signal hole is placed on the flange. The flange is formed by a die on a press after the timing hole is punched.

[0023] The punching process E also includes punching heat dissipation and weight reduction holes on the mounting web and punching weight removal holes on the outer cylindrical plane web.

[0024] Punching mounting holes: Punching mounting holes on the flat mounting plate of the semi-finished pulley after spinning. Punching heat dissipation and weight reduction holes: Punching heat dissipation and weight reduction holes on the flat transition width plate of the semi-finished pulley after spinning. Punching timing signal holes: Punching timing signal holes on the outer circular flat width plate of the semi-finished pulley after spinning. Punching de-weighting holes: Punching de-weighting holes on the outer circular flat width plate of the semi-finished pulley after spinning.

[0025] The process F also includes the following steps after flanging:

[0026] J. Shearing: Shear off two of the timing signal teeth at a fixed angle relative to the waist-shaped pin hole to form a large timing signal hole;

[0027] K. Imprinting: Imprint the starting signal mark on the plane transition plate; the starting signal mark has a fixed angle relationship with the waist-shaped pin hole;

[0028] L. Paint: Apply cathodic electrophoretic paint to the surface of the pulley to obtain the finished timing signal spinning pulley.

[0029] Compared with the existing timing signal machine plus type pulley structure, the timing signal spinning pulley of the present invention has the following beneficial results:

[0030] 1. Light weight:

[0031] Since the timing signal spinning pulley of the present invention combines the transmission function of the pulley and the control function of the timing signal plate, it is made of high-quality high-strength cold-rolled steel plate, and adopts chipless spinning processing to replace the traditional steel machining process. The raw material consumption is low, and the required material is only 25% of the original.

[0032] 2. High production efficiency:

[0033] The timing signal spinning pulley of the present invention adopts spinning and stamping technology to replace the machining process to process the multi-V belt pulley tooth shape and timing signal hole. The production cycle of a single piece can be controlled within two minutes, while the traditional machined part takes two hours. This efficiency is unmatched by traditional machining.

[0034] 3. Low cost:

[0035] In summary, the timing signal spun pulley of the present invention described in 1 and 2 above has great advantages in raw material consumption and processing efficiency, so it is cheaper than traditional machined parts in cost. The price of a timing signal machine plus a pulley is several times the price of a timing signal spun pulley.

[0036] 4. Excellent structure and performance:

[0037] Because the punched timing signal teeth are partially or completely flanging processed, the timing signal working surface formed by the original tooth head end face of the timing signal tooth and the timing signal groove is changed to a timing signal working surface along the axial cylindrical surface. When the distance from the sensor is the same, the timing signal spinning pulley of the present invention adopts a flanging design, which increases the timing signal working surface and facilitates the sensor to receive the signal.

[0038] Since the functional parts of the timing signal spinning pulley of the present invention are connected by a smooth transition through the web, and the signal hole is closed and connected with a reinforcing rib, it is avoided that the material is thinned too much when bending, which not only increases the strength of the pulley, but also makes the pulley beautiful in appearance. The traditional timing signal machine plus pulley has an open timing signal tooth, which is easy to bump and has a safety hazard. In addition, due to its heavy weight, the end of the crankshaft is too heavy, which easily causes the engine to shake. The light timing signal spinning pulley does not have this defect.

[0039] The existing outer cylindrical timing signal teeth are open, because their sharp corners are exposed, which not only easily causes scratches on the operator's arms during production and assembly, posing safety risks, but also easily causes failure due to collisions. The emergence of the timing signal spinning pulley of the present invention can completely avoid this series of defects. The tooth head of the timing signal tooth of the present invention is connected to the annular reinforcing rib to form a closed structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is one of the structural diagrams of the timing signal spinning pulley (mounting the outer convex surface in the middle of the web);

[0041] Figure 2 yes Figure 1 Side view of

[0042] Figure 3 This is the second structural diagram of the timing signal spinning pulley (the middle part of the mounting plate is a concave surface);

[0043] Figure 4 This is the third structural diagram of the timing signal spinning pulley (the middle part of the installation plate is a plane);

[0044] Figure 5 yes Figure 4 Side view of

[0045] Figure 6 It is a schematic diagram of the blank shape corresponding to each process in the manufacturing method of the timing signal spinning pulley of the second embodiment of the present invention;

[0046] Figure 7 yes Figure 6 A top view of the middle blanks M3-M7;

[0047] Figure 8 It is another structural schematic diagram of blank M5;

[0048] Fig. 9 This is the finished product M8 structural diagram of the timing signal spinning pulley;

[0049] Fig.10 It is a schematic diagram of the shape of the blank before and after flanging;

[0050] Fig.11 It is a schematic diagram of the shape of the blank after flanging;

[0051] In the figure: 1—plane mounting plate, 11—center positioning hole, 12—waist-shaped pin hole, 13—bolt hole, 14—outer circumference of plane mounting plate, 2—plane transition width plate, 21—inner circumference of plane transition width plate, 22—heat dissipation and weight reduction hole, 23—arrow mark, 24—outer circumference of plane transition width plate, 3—poly-V belt pulley tooth surface, 31—upper end of poly-V belt pulley tooth surface, 32—tooth, 33—lower end of poly-V belt pulley tooth surface, 4—inclined transition width plate, 41—small end of inclined transition width plate conical surface, 42—weight removal hole, 43—large end of inclined transition width plate conical surface, 5—timing signal working surface, 51—upper end of timing signal working surface, 52—timing signal hole, 521—small timing signal hole, 522—large timing signal hole, 523—tooth root, 524—tooth head, 53—annular reinforcement rib. DETAILED DESCRIPTION

[0052] Figure 1 , 2 In the invention, a timing signal spinning pulley is composed of a plane mounting plate 1, a plane transition web 2, a multi-ribbed belt wheel tooth surface 3, an inclined transition web 4, and a timing signal working surface 5, which are connected in sequence to form a whole. The plane mounting plate 1 is circular, with a center positioning hole 11 at its center, a waist-shaped pin hole 12 at a certain distance from the center positioning hole 11, a certain number of bolt holes 13 evenly distributed on a certain pitch circle within its plane range, and its outer circumference 14 is connected to one end 21 of the plane transition web 2. The plane transition web 2 is annular, with a certain number of heat dissipation and weight reduction holes 22 evenly distributed in the middle, and an arrow mark 23 is embossed between two heat dissipation and weight reduction holes 22, and its outer circumference 24 is connected to one end 31 of the multi-ribbed belt tooth surface 3. The multi-ribbed belt tooth surface 3 is cylindrical, with a certain number of teeth 32 evenly distributed on its outer circle, and its other end 33 is connected to the conical small end 41 of the inclined transition web 4. The inclined transition plate 4 is conical, with several weight-removing holes 42 at a certain position in the middle, and its large end 43 of the conical surface is connected to one end 51 of the timing signal working surface 5. The timing signal working surface 5 is cylindrical, and the timing signal teeth 52 are neatly distributed on its surface, including multiple small timing signal holes 521 and one large timing signal hole 522. The outermost end of the timing signal working surface 5 is an annular reinforcing rib 53. All the above connections are smooth transition connections.

[0053] The timing signal spun pulley, the center positioning hole 11 and the waist-shaped pin hole 12 are used for positioning during the production process and the assembly of the finished workpiece; the bolt hole 13 is used to transmit torque after installation; the heat dissipation and weight reduction hole 22 is used for heat dissipation and weight reduction; the arrow mark 23 is used to indicate the starting position of the pulley during assembly; the poly-V belt tooth shape 3 is used for the transmission of kinetic energy between belts; the deweighting hole 42 is used to remove weight to ensure that the rotational inertia of the pulley is small when it rotates; the small timing signal hole 521 and the large timing signal hole 522 are based on the principle of cutting magnetic lines of flux. When the pulley rotates, each spinning circle triggers the sensor to release a complete timing signal to control the fuel injection of the engine.

[0054] The timing signal spinning pulley, the center positioning hole 11 and the waist-shaped pin hole 12 have a precise relative position relationship with the bolt hole 13, the heat dissipation and weight reduction hole 22, the arrow mark 23, the deweighting hole 42, the small timing signal hole 521, and the large timing signal hole 522.

[0055] Before the shearing process, each timing signal tooth 52 and the adjacent timing signal hole 521 form a signal unit, and there are 60 units in total, which are evenly distributed. The angle between each adjacent hole and hole and between teeth is 6°. During shearing, two adjacent timing signal teeth 52 are sheared off, so that three small timing signal holes 521 become a large timing signal hole 522. In this way, the timing signal working surface 5 is composed of 58 signal teeth 52, 57 small signal holes 521 and one large signal hole 522.

[0056] The timing signal spinning pulley has a large timing signal hole 522, so that the timing signal holes are not evenly distributed on the timing signal working surface 5. The outermost end is an annular reinforcing rib 53 to prevent the signal hole working surface 5 from being deformed due to uneven force.

[0057] Figure 3 In the figure, the middle part of the mounting web of the timing signal spinning pulley is an inner concave surface C. The middle part of each timing signal tooth is bent, the tooth root 523 of each timing signal tooth is located on the outer circular plane web, the tooth head 524 of each timing signal tooth is located on the flange, the middle part of each timing signal tooth 52 is bent, and the partial outer surface of each timing signal tooth 52 located on the flange and the partial outer surface of each timing signal hole located on the flange form a cylindrical timing signal working surface.

[0058] Figure 4 , 5 In the figure, the middle part of the mounting plate of the timing signal spinning pulley is plane A, B is the cylindrical timing signal working surface, and 52 is the timing signal tooth.

[0059] Figure 6 , 7In: A method for manufacturing a timing signal spinning pulley, the method is to form a timing signal spinning pulley by drawing, spinning, stamping and shearing a cold-rolled thin steel plate, including the following main processes:

[0060] A. Blanking: The cold-rolled thin steel plate is punched into round cakes through the blanking process;

[0061] B. Drawing: The cake is drawn twice on a stretching device into a cylindrical shape with a flat plate on the outer circle, such as blank M1;

[0062] C. Edge turning: trim the edges of the web and turn the outer circle of the web neatly;

[0063] D. Spinning: Processing the multi-ribbed belt wheel tooth shape on the cylinder, such as blank M2;

[0064] E. Punching mounting holes: Punching mounting holes on the bottom surface of the semi-finished pulley after spinning, such as blank M3;

[0065] F. Punching heat dissipation holes: Punching heat dissipation holes on the semi-finished pulley plane transition width plate after spinning, such as blank M4;

[0066] G. Punching timing holes: Punching timing holes on the outer cylindrical flat plate of the semi-finished pulley after spinning, such as blank M5;

[0067] H. Punching out duplicate holes: Punching out timing holes on the outer cylindrical flat plate of the semi-finished pulley after spinning, such as blank M6;

[0068] I. Flanging: The timing hole punched on the plane is formed into a cylindrical shape through a die on a press, such as blank M7;

[0069] J. Shearing: Shear off two of the timing signal teeth at a fixed angle relative to the waist-shaped pin hole to form a large timing signal hole;

[0070] K. Imprinting: Imprint the start signal mark on the flat transition plate;

[0071] L. Paint: Apply cathodic electrophoretic paint to the surface of the pulley to obtain the finished timing signal spinning pulley.

[0072] The size of the round cake material during blanking in the present invention is calculated based on the volume of the finished product of the timing signal spinning pulley; the principle is: in the entire production process, chipless processing is adopted (although there is a turning process, the turning process is mainly to trim the outer circle of the web, and the material removed by turning is very small and can be ignored), and the required blank round cake material and the finished product of the timing signal spinning pulley are roughly the same in volume. The required blank diameter d is specifically calculated as follows:

[0073] d: Required blank diameter

[0074] r: required blank radius

[0075] t: thickness of the material

[0076] V1: Volume of the blank

[0077] V2: The volume of the finished product M8 of the timing signal spinning pulley, such as Fig. 9 As shown, since the pulley is a gyroscope, the volume can be automatically calculated by drawing software;

[0078] According to the volume formula: V1=πr 2 t, V1 = V2 = πr 2 t,

[0079] When punching the timing signal teeth in the present invention, the calculation principle of the width dimension a3 of the timing signal teeth is as follows: During the flanging, the outer cylindrical plane plate is folded to 90°. In this process, the width of the signal teeth hardly changes, but the direction changes. The specific calculation method is as follows:

[0080] a1: The width of the timing signal pulley signal hole is generally the size marked on the drawing.

[0081] a2: Width of the timing signal pulley signal teeth

[0082] a3: The width of the signal tooth during the punching process needs to be designed

[0083] d1: Outer diameter of the timing signal pulley

[0084] l1: circumference of the timing signal pulley

[0085] The circumference of the timing signal pulley l1=πd1=(a1+a2)x60;

[0086] According to the above, if Fig.10 As shown, the width of the signal tooth remains unchanged in the flange, a3 = a2;

[0087] The width of the signal tooth during the impact needs to be designed

[0088] When punching the timing signal teeth in the present invention, the calculation principle of the rib width size b is the same as the calculation principle of the round cake size, and the volume of the rib remains unchanged. The specific calculation method is as follows:

[0089] b: Width of the reinforcing rib when punching the signal tooth;

[0090] r1: The radius of the timing signal pulley, as marked on the drawing;

[0091] t: thickness of the material, as required in the drawing;

[0092] h: thickness of the reinforcement rib of the timing signal pulley;

[0093] r2: The outer diameter of the outer plane plate when the signal tooth is punched, which can be obtained by calculation. The calculation principle is the same as that of the round cake material, and can also be automatically calculated by drawing software;

[0094] r3: The outer diameter of the signal tooth when punching the signal tooth, that is, the inner diameter of the reinforced rib ring reserved on the flat plate;

[0095] v3: The volume of the reinforced rib ring reserved on the flat plate when punching the timing signal gear;

[0096] v4: volume of the reinforcement rib of the timing signal pulley;

[0097] According to the above, if Fig.11 As shown:

[0098] Where b = r2-r3, v3 = v4;

[0099] The volume of the ring of the reserved reinforcement rib on the flat plate: v3 = (πr2 2 -πr3 2 )t;

[0100] The volume of the reinforcement rib of the timing signal pulley: v4 = [πr1 2 -π(r1-t) 2 ]h;

[0101]

[0102] A manufacturing method for a timing signal spun pulley, wherein the punched mounting holes (the mounting holes include a center positioning hole, a waist-shaped pin hole, and a bolt hole) are positioned by the inner cavity wall after the spun pulley tooth profile is formed, so that the radial and axial runout of the center positioning hole and the outer circular tooth profile can be ensured; in the manufacturing method for a timing signal spun pulley, the production processes after punching the mounting holes, punching heat dissipation and weight reduction holes, punching timing holes, punching de-weighting holes, flanging, shearing, and stamping are all positioned and processed by the center positioning hole and the waist-shaped pin hole during processing.

[0103] A method for manufacturing a timing signal spinning pulley, the main steps of the spinning process include:

[0104] (a) installing a spinning mold including an upper core mold, a lower core mold, an ejector, and a spinning wheel on the upper and lower cylinders and the side cylinder of the spinning machine respectively;

[0105] (b) Place the semi-finished product that has been drawn and turned neatly on the lower core mold, close the upper and lower cylinders of the spinning machine, press the workpiece tightly, and rotate it at a certain speed;

[0106] (c) The three sets of spinning wheels installed on the side cylinders spin the pressed workpieces in turn, so that the surface of the workpieces is left with a pulley tooth shape that meets the design requirements;

[0107] (d) The spinning machine stops rotating, the spinning upper cylinder retreats, the workpiece with the spun tooth shape is no longer pressed, and the ejector installed in the lower core mold ejects it, and the spinning is completed.

[0108] If an open timing groove is punched out on the flat plate of the semi-finished pulley outer circle after spinning, such as Figure 8 For the middle blank M5, the timing signal spinning pulley formed after flanging is as follows Figure 4 The root of each timing signal tooth 52 is located on the flange, the tooth head of each timing signal tooth 52 is located on the flange, and all of the timing signal teeth 52 are located on the flange. The entire outer surface of each timing signal tooth (52) and each timing signal hole / groove form a cylindrical timing signal working surface (5).

Claims

1. A method for manufacturing a timing signal spinning pulley, characterized in that: The cold-rolled thin steel plate is subjected to drawing, spinning, stamping and shearing to form a timing signal spinning pulley, the timing signal spinning pulley comprises a spinning pulley body, the spinning pulley body comprises a cylindrical barrel, the outer surface of the cylindrical barrel is a toothed surface matching the timing belt, one end of the cylindrical barrel is a mounting web plate, the other end of the cylindrical barrel is connected to an outer circular plane web plate, the outer circular plane web plate comprises a transition web plate located in the middle, a circle of timing signal teeth (52) arranged around the edge of the transition web plate, a timing signal hole / groove is provided between two adjacent timing signal teeth (52), and the outer circle of the outer circular plane web plate is bent to form a flange; The bending position of the outer ring of the outer circular plane plate is located in the middle of the timing signal tooth (52), so the middle of each timing signal tooth (52) is bent, and the partial outer surface of each timing signal tooth (52) located on the flange and the partial outer surface of each timing signal hole / slot located on the flange form a cylindrical timing signal working surface (5); the timing signal hole is closed and connected by a reinforcing rib; When a timing signal groove is formed between two adjacent timing signal teeth (52), the tooth head (524) of each timing signal tooth (52) is connected to the annular reinforcing rib (53) to form a closed structure; The manufacturing method includes the following steps: A. Blanking: The cold-rolled thin steel plate is punched into round cakes through a blanking process. The diameter of the round cake is Wherein, the finished product volume V2 of the timing signal spinning pulley is known, the thickness t of the round cake material is known, and the volume V1 of the round cake material = the finished product volume V2 of the timing signal spinning pulley; B. Drawing: The cake is drawn on a stretching device to form a cylinder with an outer circular flat plate, with one end of the cylinder being the mounting plate; C. Edge turning: trim the outer circular flat plate and turn the outer circle of the outer circular flat plate neatly; D. Spinning: Processing the multi-ribbed belt wheel tooth shape on the outer circle of the cylinder; E. Punching holes / grooves: Punch mounting holes on the mounting plate, and punch timing signal holes / grooves on the outer circular plane plate near the outer circle to form timing signal teeth; the mounting holes include a center positioning hole, a waist-shaped pin hole, and a bolt hole; the width of the timing signal tooth a3=a2=πd1 / N-a1, where the width a1 of the signal hole of the timing signal pulley and the outer diameter d1 of the timing signal pulley are known, and the number of timing signal teeth N on the timing signal pulley is equal to the number of punched timing signal holes / grooves; F. Flanging: The outer ring of the outer circular flat plate is bent to form a cylindrical flange, and the timing signal hole is partially placed on the flange. During flanging, the outer circular flat plate is folded. During this process, the width of the signal tooth hardly changes, but the direction changes. The punching process E also includes punching heat dissipation and weight reduction holes on the mounting web and punching weight removal holes on the outer circular plane web; Punching mounting holes: Punching mounting holes on the flat mounting plate of the semi-finished pulley after spinning; Punching heat dissipation and weight reduction holes: Punching heat dissipation and weight reduction holes on the flat transition width plate of the semi-finished pulley after spinning; Punching timing signal holes: Punching timing signal holes on the outer cylindrical flat width plate of the semi-finished pulley after spinning; Punching de-weighting holes: Punching de-weighting holes on the outer cylindrical flat width plate of the semi-finished pulley after spinning; The process F also includes the following steps after flanging: J. Shearing: Shear off two of the timing signal teeth at a fixed angle relative to the waist-shaped pin hole to form a large timing signal hole; K. Imprinting: Imprint the starting signal mark on the plane transition plate; the starting signal mark has a fixed angle relationship with the waist-shaped pin hole; The center positioning hole and the waist-shaped pin hole have precise relative positional relationships with the bolt hole, the starting signal mark, the deweighting hole, the timing signal hole, and the large timing signal hole.

2. The method for manufacturing a timing signal spinning pulley according to claim 1, characterized in that: The timing signal hole / slot comprises a plurality of small timing signal holes / slots and one large timing signal hole / slot, and a deduplication hole (42) is formed on the transition width plate corresponding to the large timing signal hole / slot.

3. The manufacturing method of the timing signal spinning pulley according to claim 1, characterized in that: The mounting web is in a plane shape, with a central portion convex outward or concave inward, and has a central positioning hole (11), bolt holes (13), and heat dissipation and weight reduction holes (22) distributed from the inside to the outside.

4. The method for manufacturing a timing signal spinning pulley according to claim 1, characterized in that: The timing signal spinning pulley is composed of five sections connected in sequence, namely, a plane mounting plate (1), a plane transition plate (2), a multi-ribbed belt wheel tooth surface (3), an inclined plane transition plate (4), and a timing signal working surface (5) to form a whole; the plane mounting plate (1) and the plane transition plate (2) form a mounting plate; the plane mounting plate (1) is circular, and a mounting hole is provided on the plane mounting plate (1); the plane transition plate (2) is annular, and the outer circumference (14) of the plane mounting plate (1) is connected to the inner circumference (21) of the plane transition plate (2); a circle of waist-shaped heat dissipation and weight reduction holes (22) are evenly distributed in the middle of the plane transition plate (2); arrow marks (23) are printed in the middle of two of the heat dissipation and weight reduction holes (22); the outer circumference (14) of the plane transition plate (2) is connected to the inner circumference (21) of the plane transition plate (2); 24) is connected to one end (31) of the multi-V belt toothed surface (3); the multi-V belt toothed surface (3) is a cylindrical surface, and a circle of teeth (32) is evenly distributed on the outer circle of the cylindrical surface; the other end (33) of the multi-V belt toothed surface (3) is connected to the small end (41) of the conical surface of the inclined surface transition plate (4); the inclined surface transition plate (4) is conical, and a plurality of deweighting holes (42) are arranged in the middle of the inclined surface transition plate (4); the large end (43) of the conical surface of the inclined surface transition plate (4) is connected to one end (51) of the timing signal working surface (5), and the other end of the timing signal working surface (5) is an annular reinforcing rib (53); the timing signal working surface (5) is cylindrical, and is composed of a plurality of signal units, and a timing signal tooth (52) and a timing signal hole / groove constitute a signal unit.

5. The method for manufacturing a timing signal spinning pulley according to claim 4, characterized in that: The tooth root of each timing signal tooth (52) is located on the inclined transition web (4).

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