A high-precision sheet metal damping pulley processing technology and its processing equipment

Abstract

The present invention discloses a processing technology and processing equipment for a high-precision sheet metal damping pulley, including: S1; stamping and blanking: unwinding and leveling a whole coil of steel coil and then transporting it to the bottom of a stamping machine to stamp it into a disc-shaped blank for standby; S2; stretching: fixing the disc-shaped blank in S1 to the main shaft of a machine tool and stretching the disc-shaped blank into a dish-shaped blank; S3; spinning: using a spinning wheel to spin on the outer side of the dish-shaped blank to form tooth grooves on the outer side of the dish-shaped blank; S4; shifting: transferring the spun blank to a laterally positioned processing station and performing precise positioning; S5; boring of shaft holes: boring the middle part of the positioned blank until the bored bearing hole meets the aperture requirements; S6; punching: punching the web position of the blank to punch out a number of web holes, and at the same time punching characters on the web to obtain a pre-finished product; S7; surface treatment. Through this process plan, the material utilization rate is effectively improved, the production rhythm is fast, it is more suitable for large-scale production, and the manufacturing cost is lower.

Description

Technical Field

[0001] The present invention relates to the field of pulley processing, in particular to a processing technology and processing equipment for a high-precision sheet metal damping pulley. Background Art

[0002] The pulley belongs to the disc hub parts, and is generally mainly made by casting and forging. The common processing technology for the pulley tooth groove rim located in the middle of the outer shape in traditional processing and manufacturing is: forging blank - turning one end - punching - laser typing - turning the other end - deburring - electrophoresis. Due to the low material utilization rate of machining, slow production beat, it is not suitable for large-scale production. Moreover, turning destroys the metal fibers on the surface of the pulley tooth groove, there are microcracks after turning, reducing the fatigue strength of the pulley structure. At the same time, the cost of controlling the surface roughness of the pulley tooth groove by the tool is high, and the tool blades need to be frequently replaced. The finished weight of the machined pulley is large, which is not conducive to lightweight manufacturing, and the manufacturing cost is too high.

[0003] In the manufacturing process of the existing pulley, the spinning process is adopted. Spinning is to fix a flat or hollow blank on the die of the spinning machine. While the blank rotates with the main shaft of the machine tool, a spinning wheel or a driving bar is used to apply pressure to the blank to cause local plastic deformation. The method of making a pulley by spinning not only increases the density of the material, improves the strength of the part, but also has the effects of saving materials, saving energy, and having no environmental pollution.

[0004] However, in the existing spinning processing technology, first, the blank needs to be locked to the shaft head, and after spinning, the semi-finished blank is removed and clamped on the lathe to machine the remaining structure. Whether it is the spinning process or the latter turning process, manual material taking and loading are required, resulting in a low manufacturing efficiency of the spinning process. Although the quality of the pulley obtained is better, it cannot be mass-produced.

[0005] Therefore, this case aims to provide a processing technology and processing equipment for quickly preparing a pulley, which can achieve high-precision processing of the pulley during the preparation process, and at the same time can ensure the positioning accuracy when switching workstations to ensure the precise processing process of the bearing hole and the web hole. Summary of the Invention

[0006] The present invention provides a processing technology and processing equipment for a high-precision sheet metal damping pulley, which can effectively solve the above problems.

[0007] The present invention is implemented as follows:

[0008] A processing technology for a high-precision sheet metal damping pulley includes:

[0009] S1; stamping and blanking: Unroll and flatten the whole roll of steel coil and transfer it to the bottom of the stamping machine to stamp it into a disc-shaped blank for standby;

[0010] S2; Stretching: Fix the disc-shaped blank in S1 to the spindle of the machine tool, and stretch the disc-shaped blank into a dish-shaped blank.

[0011] S3; Spinning: Use a spinning wheel to spin on the outer side of the dish-shaped blank to form tooth grooves on the outer side of the dish-shaped blank.

[0012] S4; Displacement: Transfer the spun blank to the lateral processing position and perform precise positioning.

[0013] S5; Axial hole turning: Turn the middle part of the positioned blank until the bearing hole turned out meets the aperture requirements.

[0014] S6; Punching: Punch the web position of the blank to punch out a number of web holes, and at the same time punch words on the web to obtain a pre-finished product.

[0015] S7; Surface treatment: Perform surface treatment on the pre-finished product.

[0016] As a further improvement, S2 further includes: Turning and shaping: Turn off the outer edge of the stretched dish-shaped blank to remove the uneven ears caused by the anisotropy of the raw material.

[0017] As a further improvement, S3 specifically includes:

[0018] S31; First spinning: Perform tooth groove pre-forming stacking on the stretched dish-shaped blank, and pre-form the middle rim, the height of the middle rim is equal to the final required size, and the diameter of the part to be formed with the groove is equal to the diameter of the vertex of the final groove arc.

[0019] S32; Second spinning: Perform fine forming of the tooth grooves and related rims on the spun semi-finished product after the first spinning to ensure that the dimensions of each part of the tooth grooves meet the requirements.

[0020] As a further improvement, S4 specifically includes:

[0021] S41; Insert the transposition clamp from the rear of the outer edge of the spun blank, and let the middle part of the blank disengage from the spindle head position of the machine tool.

[0022] S42; Let the clamping disc on the processing position give way in advance, horizontally move the blank that has been clamped into the processing position, and the central hole of the blank corresponds to the central position of the spindle head.

[0023] S43; Let the clamping disc push inward, drive the blank to move toward the spindle head side of the machine tool, so that the middle part and the outer edge of the blank are fixed by the processing position.

[0024] As a further improvement, S43 specifically includes:

[0025] S431; Move the blank towards the spindle nose side through the entire surface of the clamping disc until the blank abuts against the spindle nose position. The outer edge of the blank is buckled outside the spindle nose to limit the blank in the X-axis direction.

[0026] S432; During the process of the clamping disc approaching the blank, the guiding pins on its surface will push the blank towards the moving direction side, enabling it to reach a precise position in the Y-axis direction.

[0027] As a further improvement, S6 is specifically: The position of the blank to be punched with the web holes corresponds to the clamping seat of the spindle nose. During stamping, the stamping column directly punches through the web holes in the clamping seat of the spindle nose.

[0028] As a further improvement, S7 specifically includes:

[0029] S71; Use tools to remove the burrs at the web holes, bearing holes, and bolt mounting holes of the pre-finished product to obtain a deburred blank.

[0030] S72; Perform surface protection treatment on the deburred blank to finally form a finished pulley.

[0031] The present invention also provides a high-precision sheet metal vibration-damping pulley processing device, which is applied to the above-mentioned high-precision sheet metal vibration-damping pulley processing process, including:

[0032] A transfer structure, the transfer structure includes a guide rail installed on the top of the machine body, a sliding frame slidably arranged in the guide rail, an electric push rod locked at the bottom of the sliding frame, and a pneumatic clamping plate sleeved on the output end of the electric push rod;

[0033] A spinning structure, the spinning structure includes a first fixing frame installed on the machine body, a first bearing seat locked on the first fixing frame, a first shaft disc locked in the first bearing seat, a blank clamped in the first shaft disc, a pressing cylinder installed opposite to the first shaft disc, a pressing shaft inserted inside the pressing cylinder, a first sliding motor connected to the pressing shaft, and a spinning assembly located on the side of the first shaft disc and the pressing cylinder. The spinning assembly includes a movable base and a spinning arm movably installed on the movable base;

[0034] A hole machining structure, the hole machining structure is located on the right side of the spinning structure. The hole machining structure includes a second fixing frame installed on the machine body, a second bearing seat locked on the second fixing frame, a second shaft disc locked on the second bearing seat, a composite machining part oppositely arranged on the second shaft disc. The composite machining part includes a turning component corresponding to the second shaft disc and a stamping component slidably installed on the outer peripheral surface of the turning component;

[0035] A transmission channel is located at the end of the moving direction of the transfer structure, and the processed semifinished product is placed into the transmission channel by the transfer structure.

[0036] As a further improvement, the first shaft disc includes a first mounting seat connected to the first bearing seat, several outer support clips locked axially on the first mounting seat, a through shaft vertically inserted into the center of the first mounting seat. The second shaft disc includes a second mounting seat connected to the second bearing seat, several heightening seats locked axially on the second mounting seat, alignment holes opened in the heightening seats, an electric oil cylinder installed on the top of the second mounting seat, a tightening disc connected to the output end of the electric oil cylinder, a limiting strip arranged on the inner right side wall of the tightening disc, and a limiting post vertically inserted into the left end of the outer shaft of the tightening disc.

[0037] As a further improvement, the turning component includes a push-pull seat connected to the machine body, a connecting plate locked on the push-pull seat, a lead screw member installed on the connecting plate, an extension column welded to the nut of the lead screw member, a tool clamped on the extension column, and an isolation cylinder covering the outside of the extension column. The stamping component includes a stamping seat sleeved outside the isolation cylinder. The stamping seat is slidably arranged on the track extended from the first fixing frame, and a stamping part movably arranged in the stamping seat, and the stamping part corresponds to the alignment hole.

[0038] The beneficial effects of the present invention are:

[0039] The processing technology of the present invention is applied to a pulley with a pulley tooth groove rim located in the middle structure of the outer shape. The tooth groove size is ensured by spin forming. The surface hardness of the tooth groove is high, the roughness is small, the product size and performance quality are guaranteed. Through this process plan, the material utilization rate is effectively improved, the production beat is fast, it is more suitable for large-scale production, and the manufacturing cost is lower.

[0040] The present invention turns the deformed position after stretching, so as to reduce the influence of the concave and convex positions during the spin forming process on the formed blank.

[0041] The present invention adopts a secondary spin forming process in the process of forming a pulley with a pulley tooth groove rim located in the middle structure of the outer shape. During the first spin forming process, the rim in the middle is directly preformed first to form the most basic style. And during the second spin forming process, a finishing method is adopted to make the refined tooth groove meet the size requirements of the pulley. Through the segmented spin forming process, a non-standard pulley with a more complex outer shape can be formed.

[0042] In the existing spinning process, the semi-finished product after spinning is often fixed to the processing lathe by manual clamping. This not only requires re-guaranteeing the clamping accuracy but also requires a retooling process. The process is complex and prone to accuracy loss. Therefore, the present invention further proposes that after the spinning process is completed, the spun blank is directly clamped and moved into the processing position, eliminating the need for re-aligning the workpiece and the manual feeding process, and connecting the spinning, turning, and stamping processes together.

[0043] On the above basis, the transfer accuracy of the blank directly affects the subsequent turning accuracy. Therefore, during the transfer process, the blank is limited in both the X-axis and Y-axis directions to make the blank correspond to the turning and stamping structures, ensuring the processing accuracy in the later stage and reducing the generation of waste.

[0044] In the stage of stamping the web holes, since the prototype of the pulley has been formed at this time and the tooth grooves on its outer edge have been formed after spinning, if the web surface is directly stamped at this time, it may cause deformation of the web in local areas, resulting in a decrease in the quality of the pulley. In response to this, the present invention further proposes to press the blank against the clamping seat, and then make the hole positions on the clamping seat correspond to the stamping structure, so that the web is supported during the stamping process and the web holes at the corresponding positions can be accurately punched, with accurate positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0046] Figure 1 is the process flow chart of a high-precision sheet metal damping pulley processing process of the present invention.

[0047] Figure 2 is the structural schematic diagram of a high-precision sheet metal damping pulley processing equipment of the present invention.

[0048] Figure 3 is the structural schematic diagram of a first shaft disc of the present invention.

[0049] Figure 4 is the structural schematic diagram of a second shaft disc of the present invention.

[0050] Figure 5 is the structural schematic diagram of the outer rim of a pulley to be processed of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] To make the embodiments of the present invention, they all fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0052] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined. To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0053] Refer to Figures 1 to 4 As shown, a high-precision sheet metal damping pulley processing process includes:

[0054] S1; stamping and blanking: Unroll and flatten the whole coil of steel strip and transfer it to the bottom of the stamping machine to stamp it into a disc-shaped blank for standby;

[0055] In this embodiment, the whole coil of steel strip is transferred into the conveyor belt, flattened by the conveyor belt and then enters the stamping mechanism, and is punched into several disc blanks by the impact mechanism reasonably.

[0056] S2; stretching: Fix the disc-shaped blank in S1 to the main shaft of the machine tool and stretch the disc-shaped blank into a dish-shaped blank;

[0057] The S2 further includes: turning and shaping: Turn off the outer edge of the stretched dish-shaped blank to remove the uneven ears caused by the anisotropy of the raw material, and turn the deformed position after stretching to reduce the influence of the uneven positions on the formed blank during the spinning process.

[0058] S3; spinning: Use a spinning wheel to spin on the outside of the dish-shaped blank to form tooth grooves on the outside of the dish-shaped blank. The S3 specifically includes:

[0059] S31; First spinning: The stretched disc-shaped blank is preformed into a tooth groove and preformed into a middle wheel rim, the height of which is equal to the final required size, and the diameter of the groove portion to be formed is equal to the final groove arc vertex diameter;

[0060] S32; Second spinning: perform fine forming of the tooth groove and related wheel rim on the semi-finished product after the first spinning to ensure that the dimensions of each part of the tooth groove meet the requirements.

[0061] It should be emphasized that the pulley formed in this embodiment is non-standard. Figure 5 It can be seen from the figure that the pulley of this embodiment is a structure in which the tooth groove rim of the pulley is located in the middle of the outer shape. In the process of forming the pulley with the tooth groove rim located in the middle of the outer shape, a secondary spinning process is adopted. In the first spinning process, the rim of the middle part is directly preformed to form the most basic style first. In the second spinning process, a fine-tuning method is adopted to make the fine-tuned tooth groove meet the size requirements of the pulley. The segmented spinning process can form non-standard pulleys with more complex shapes.

[0062] S4: Moving: transferring the spun blank to the lateral processing position and accurately positioning it. S4 specifically includes:

[0063] S41: insert the repositioning clamp from the rear of the outer edge of the spun blank, and allow the middle of the blank to be separated from the axis head position of the machine tool;

[0064] S42: Make the chuck on the processing position move out of position in advance, and move the clamped blank horizontally into the processing position, with the center opening of the blank corresponding to the center position of the shaft head;

[0065] S43: Push the chuck inwards to move the blank toward the side of the machine tool shaft head, so that the middle and outer edges of the blank are fixed in the processing position.

[0066] In the spinning process of the prior art, the semi-finished product after spinning is often fixed to the processing lathe by manual clamping. Not only does it need to ensure the accuracy of clamping again, but it also needs to perform a tool re-alignment process. The process is complicated and easily leads to loss of accuracy. Therefore, the present invention further proposes that after the spinning process is completed, the spun blank is directly clamped and moved to the processing position, eliminating the workpiece re-alignment process and the need for manual loading process, and connecting the spinning, turning and stamping processes in series.

[0067] Based on the above, the transfer accuracy of the blank directly affects the subsequent turning accuracy, so the S43 specifically includes:

[0068] S431; Move the blank towards the machine tool spindle head side through the entire surface of the clamping disc until the blank abuts against the spindle head position, and the outer edge of the blank is buckled outside the spindle head to limit the blank in the X-axis direction;

[0069] S432; During the process of the clamping disc approaching the blank, the guide pins on its surface will push the blank towards the side of its moving direction, so that it can reach the accurate position in the Y-axis direction.

[0070] During the transportation process, limit the blank in both the X-axis and Y-axis directions at the same time, so that the blank can correspond to the turning and stamping structures, ensure the machining accuracy in the later stage, and reduce the generation of waste.

[0071] S5; Bore the shaft hole: Bore the middle part of the located blank until the bearing hole bored meets the aperture requirements;

[0072] S6; Punch holes: Punch holes in the web position of the blank to punch out a number of web holes, and at the same time punch characters on the web to obtain a pre-finished product;

[0073] The specific content of S6 is as follows: The position of the web hole to be punched on the blank corresponds to the clamping seat of the spindle head. During stamping, the punching column directly punches through the clamping seat of the spindle head to punch out the through web holes.

[0074] In the stage of punching the web holes, since the prototype of the pulley has been formed at this time and the tooth grooves on its outer edge have been formed after spinning, if the web surface is directly stamped at this time, it may cause the web in the local area to deform, resulting in a decrease in the quality of the pulley. In response to this, the present invention further proposes to press the blank against the clamping seat, and then make the hole positions on the clamping seat correspond to the stamping structure, so that the web is supported during stamping, and the web holes at the corresponding positions can be accurately punched, with accurate positioning.

[0075] S7; Surface treatment: Perform surface treatment on the pre-finished product. The specific content of S7 includes:

[0076] S71; Use tools to remove the burrs at the web holes, bearing holes, and bolt mounting holes of the pre-finished product to obtain a burr-free blank;

[0077] S72; Perform surface protection treatment on the burr-free blank to finally form a finished pulley.

[0078] Perform surface treatment on the pre-finished product, so that each position of the pulley can be polished more finely. Among them, the surface treatment steps can be: electrophoresis, galvanizing, phosphating treatment, etc.

[0079] The processing technology in this embodiment is applied to a pulley with a pulley tooth groove rim located in the middle of the outer shape. The tooth groove size is ensured by spin forming. The tooth groove surface has high hardness and small roughness. The product size and performance quality are guaranteed. Through this process plan, the material utilization rate is effectively improved, the production beat is fast, it is more suitable for large-scale production, and the manufacturing cost is lower.

[0080] In another embodiment of the present invention, a processing device for a high-precision sheet metal damping pulley is also proposed. Applying the above-mentioned processing technology for a high-precision sheet metal damping pulley, it includes: a transfer structure 10, the transfer structure 10 includes a guide rail 11 installed on the top of the machine body, a sliding frame 12 slidably arranged in the guide rail 11, an electric push rod 13 locked at the bottom of the sliding frame 12, and a pneumatic clamping plate 14 sleeved on the output end of the electric push rod 13; a spin forming structure 20, the spin forming structure 20 includes a first fixing frame 21 installed on the machine body, a first bearing seat 22 locked on the first fixing frame 21, a first shaft disc 23 locked in the first bearing seat 22, a blank is clamped in the first shaft disc 23, a pressing cylinder 24 installed opposite to the first shaft disc 23, a pressing shaft 25 inserted inside the pressing cylinder 24, a first sliding motor 26 connected to the pressing shaft 25, and a spin forming assembly 27 located on the side of the first shaft disc 23 and the pressing cylinder 24. The spin forming assembly 27 includes a movable base 271 and a spin forming arm 272 movably installed on the movable base 271; a hole processing structure 30, the hole processing structure 30 is located on the right side of the spin forming structure 20. The hole processing structure 30 includes a second fixing frame 31 installed on the machine body, a second bearing seat 32 locked on the second fixing frame 31, a second shaft disc 33 locked on the second bearing seat 32, a composite processing part 34 arranged oppositely on the second shaft disc 33. The composite processing part 34 includes a turning component 341 corresponding to the second shaft disc 33, and a stamping component 342 slidably installed on the outer peripheral surface of the turning component 341; a transmission channel 40, located at the end of the moving direction of the transfer structure 10, and the transfer structure 10 places the processed semi-finished product into the transmission channel 40.

[0081] Since the spinning assembly 27 needs to complete two spinning actions in total, but in fact, it only has one set of spinning structures, the movable base 271 in this embodiment includes a mounting base 2711 connected to the first fixed frame 21, a base 2712 vertically fixed to the top surface of the mounting base 2711, a parallel guide rail 2713 welded on the base 2712, a sliding seat 2714 slidingly set on the parallel guide rail 2713, and a rotating seat 2715 locked on the sliding seat 2714. The spinning arm 272 is clamped on the rotating seat 2715, thereby allowing the spinning arm 272 to move forward and backward, change direction forward and backward, etc. In the first spinning process, the outer edge part of the middle part is first spun out, and then exits to perform the secondary spinning step. The suitable outer edge part of the pulley can be quickly spun out within a short period of time.

[0082] In this embodiment, unlike the traditional spinning machine which has only one set of workstations, the spinning structure 20 and the hole processing structure 30 in this embodiment are arranged side by side, that is, after the spinning is completed, it automatically enters the hole processing structure 30 to achieve seamless processing without manual disassembly and reinstallation. This is specifically achieved through the transfer structure 10. During the spinning stage, the outer edge of the pulley has been spin-formed, thereby allowing the pneumatic clamping plate 14 of the transfer structure 10 to have a certain clamping space. After the pneumatic clamping plate 14 clamps it and detaches it from the spinning structure 20, it directly enters the hole processing structure 30 by translation. No manual alignment is required in one direction, and manual alignment is all done by visual inspection, which has poor accuracy.

[0083] Due to the different workstations, the fixing and clamping structures used in the spinning structure 20 and the hole processing structure 30 must also be different:

[0084] In the fixed structure of the spinning structure 20, the first shaft disc 23 includes a first mounting seat 231 connected to the first bearing seat 22, a plurality of outer support clips 232 locked in the axial direction of the first mounting seat 231, and a through shaft 233 vertically inserted into the axis of the first mounting seat 231. The hole on the disc blank is directly fixed on the through shaft 233. As the first shaft disc 23 and the first bearing seat 22 rotate, the outer rim after spinning will directly fit the outer support clips 232, so that the structure formed after spinning can be supported.

[0085] In the fixed structure of the hole processing structure 30, since turning and stamping need to be performed simultaneously in the hole processing structure 30, its fixed structure is more complex and more targeted than that of the spinning structure 20. Specifically:

[0086] The second shaft disc 33 includes a second mounting seat 331 connected to the second bearing seat 32, a plurality of shim seats 332 locked axially on the second mounting seat 331, alignment holes 333 opened in the shim seats 332, an electric oil cylinder 334 mounted on the top of the second mounting seat 331, a clamping disc 335 connected to the output end of the electric oil cylinder 334, a limiting strip 336 provided on the inner right side wall of the clamping disc 335, and a limiting post 337 vertically inserted into the left end of the outer axis of the clamping disc 335. When the transfer structure 10 holds the spun blank and enters, it will enter the space formed by the opened clamping disc 335 and the second mounting seat 331 until the transfer structure 10 touches the limiting strip 336, which means that it has moved in place on the X-axis at this time. Then, the electric oil cylinder 334 is driven to drive the clamping disc 335 to move towards the second mounting seat 331, and the clamping disc 335 drives the blank to press against the second mounting seat 331, so as to limit the blank in the Y-axis direction. And during the process of limiting in the Y-axis direction, the limiting post 337 gradually approaching the blank will push the blank towards the side of the limiting strip 336, so that the X-axis direction is not easily deflected even during the adjustment in the Y-axis direction. Among them, the limiting post 337 is a rod with a certain arc, which guides in the initial stage of contact with the blank and then performs fixed limiting.

[0087] After the clamping disc 335 is pressed in place, the position of the blank web hole to be punched corresponds to the position of the shim seat 332 and the alignment hole 333 in the shim seat 332, so that when the punching component 342 punches, the punching surface of the punching area can directly bear pressure into the shim seat 332, making it not easy for the punching area to deform. And when punching, the punch of the punching component 342 will directly sink into the alignment hole 333. The aperture of the alignment hole 333 is the same as the aperture of the web hole or the bolt hole, and at the same time corresponds to the punch of the punching component 342, so as to ensure the punching accuracy without damaging the blank.

[0088] During the whole process, two stations are the limit of processing. If three stations are set, it is easy to cause the area of the whole equipment to be too large. However, in this case, the hole processing structure 30 needs to have both turning and punching functions at the same time. Therefore, in this embodiment, the composite processing part 34 includes a turning component 341 corresponding to the second shaft disc 33, and a punching component 342 slidably mounted on the outer peripheral surface of the turning component 341. Specifically:

[0089] The turning component 341 includes a push-pull seat 3411 connected to the body, a connecting plate 3412 locked on the push-pull seat 3411, a lead screw member 3413 installed on the connecting plate 3412, an extension column 3414 welded to the nut of the lead screw member 3413, a cutting tool 3415 clamped on the extension column 3414, an isolation cylinder 3416 covering the outside of the extension column 3414. The cutting tool 3415 clamped on the extension column 3414 can translate as the lead screw member 3413 rotates, thereby completing the internal and external cutting processes of the bearing hole. The lead screw member 3413 fixed on the connecting plate 3412 can move forward and backward through the push-pull seat 3411 to make way for the stamping component 342.

[0090] Both the translation process and the forward and backward movement process of the entire turning component 341 occur in the isolation cylinder 3416 and are separately separated from the stamping component 342.

[0091] The stamping component 342 includes a stamping seat 3421 sleeved outside the isolation cylinder 3416. The stamping seat 3421 is slidably arranged on the track extended from the first fixed frame 21. A stamping part 3422 is movably arranged in the stamping seat 3421. The stamping part 3422 corresponds to the alignment hole 333. Due to the limitation of the isolation cylinder 3416, the stamping process does not interfere with the turning component 341. The stamping part 3422 is detachably arranged and the pipe diameter can be changed according to the corresponding spoke holes and bolt holes.

[0092] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A processing technology for a high-precision sheet metal vibration damping pulley, characterized in that, Including: S1; Stamping and blanking: Unroll and flatten the whole coil of steel strip and transfer it to the bottom of the stamping machine to stamp it into a disc-shaped blank for standby; S2； Drawing : Fix the disc-shaped blank in S1 to the main shaft of the machine tool and draw the disc-shaped blank into a dish-shaped blank; S3； Spinning: Use a spinning wheel to spin on the outer side of the dish-shaped blank to form tooth grooves on the outer side of the dish-shaped blank; S4； Displacement: Transfer the spun blank to the lateral processing position and perform precise positioning; The specific steps of S4 include: S41; Insert the transposition clamp from the rear of the outer edge of the spun blank and let the middle part of the blank disengage from the shaft head position of the machine tool; S42; Let the clamping disc on the processing position make way in advance, horizontally move the blank that has been clamped into the processing position, and the central hole of the blank corresponds to the central position of the shaft head; S43; Let the clamping disc push inward, drive the blank to move toward the shaft head side of the machine tool, so that the middle part and the outer edge of the blank are fixed by the processing position; The specific steps of S43 include: S431; Move the blank toward the shaft head side of the machine tool through the entire surface of the clamping disc until the blank abuts against the shaft head position, and the outer edge of the blank is buckled outside the shaft head to limit the X-axis direction of the blank; S432; During the process of the clamping disc approaching the blank, the guiding pin on its surface will push the blank toward the moving direction side, so that it can reach the precise position in the Y-axis direction; S5; Boring the shaft hole: Bore the middle part of the positioned blank until the bearing hole bored meets the aperture requirements; S6; Punching: Punch the web position of the blank to punch out a number of web holes, and at the same time punch characters on the web to obtain a pre-finished product; S7; Surface treatment: Perform surface treatment on the pre-finished product.

2. The processing technology of a high-precision sheet metal damping pulley according to claim 1, characterized in that, S2 further includes: Turning and shaping: Turn off the outer edge of the drawn dish-shaped blank to remove the uneven ears caused by the anisotropy of the raw material.

3. A high-precision sheet metal damping pulley processing technology according to claim 1, characterized in that, The specific steps of S3 include: S31; First spinning: Perform tooth groove pre-forming stacking on the drawn dish-shaped blank and pre-form the middle flange, the height of the middle flange is equal to the final required size, and the diameter of the part to be formed in the groove is equal to the diameter of the vertex of the final groove arc; S32; Second spinning: Perform fine forming of the tooth groove and related flanges on the spun semi-finished product after the first spinning to ensure that the dimensions of each part of the tooth groove meet the requirements.

4. A high-precision sheet metal damping pulley processing technology according to claim 1, characterized in that, The specific steps of S6 are: The position of the web hole to be punched on the blank corresponds to the clamping seat of the shaft head, and when punching, the punching column directly punches through the web hole in the clamping seat of the shaft head.

5. A high-precision sheet metal damping pulley processing technology according to claim 1, characterized in that, The specific steps of S7 include: S71; Use tools to remove the burrs at the web holes, bearing holes and bolt mounting holes of the pre-finished product to obtain a deburred blank; S72; Perform surface protection treatment on the deburred blank to finally form a finished pulley.

6. A processing device for a high-precision sheet metal vibration damping pulley, which is applied to a processing process for a high-precision sheet metal vibration damping pulley according to any one of claims 1-5, characterized in that, Including: A transfer structure (10), the transfer structure (10) includes a guide rail (11) installed on the top of the machine body, a sliding frame (12) slidably arranged in the guide rail (11), an electric push rod (13) locked at the bottom of the sliding frame (12), and a pneumatic clamping plate (14) sleeved on the output end of the electric push rod (13); A spinning structure (20), the spinning structure (20) includes a first fixing frame (21) installed on the machine body, a first bearing seat (22) locked on the first fixing frame (21), a first shaft disc (23) locked in the first bearing seat (22), a blank is clamped in the first shaft disc (23), a pressing cylinder (24) installed opposite to the first shaft disc (23), a pressing shaft (25) inserted inside the pressing cylinder (24), a first sliding motor (26) connected to the pressing shaft (25), a spinning assembly (27) located on the side of the first shaft disc (23) and the pressing cylinder (24), the spinning assembly (27) includes a movable base (271) and a spinning arm (272) movably installed on the movable base (271); A hole machining structure (30), the hole machining structure (30) is located on the right side of the spinning structure (20), the hole machining structure (30) includes a second fixing frame (31) installed on the machine body, a second bearing seat (32) locked on the second fixing frame (31), a second shaft disc (33) locked on the second bearing seat (32), a composite machining part (34) arranged opposite on the second shaft disc (33), the composite machining part (34) includes a turning component (341) corresponding to the second shaft disc (33), a stamping component (342) slidably installed on the outer peripheral surface of the turning component (341); A transmission channel (40), located at the end of the moving direction of the transfer structure (10), and the transfer structure (10) places the processed pre-finished product into the transmission channel (40).

7. A high-precision sheet metal vibration damping pulley processing device according to claim 6, characterized in that, The first shaft disc (23) includes a first mounting seat (231) connected to the first bearing seat (22), a plurality of outer support clips (232) locked on the axial direction of the first mounting seat (231), a through shaft (233) vertically inserted into the center of the first mounting seat (231), the second shaft disc (33) includes a second mounting seat (331) connected to the second bearing seat (32), a plurality of heightening seats (332) locked on the axial direction of the second mounting seat (331), alignment holes (333) opened in the heightening seats (332), an electric oil cylinder (334) installed on the top of the second mounting seat (331), a tightening disc (335) connected to the output end of the electric oil cylinder (334), a limiting strip (336) arranged on the inner right side wall of the tightening disc (335), a limiting post (337) vertically inserted into the left end of the outer shaft of the tightening disc (335).

8. A high-precision sheet metal damping pulley processing device according to claim 6, characterized in that, The turning component (341) includes a push-pull seat (3411) connected to the body, a connecting plate (3412) locked on the push-pull seat (3411), a lead screw member (3413) installed on the connecting plate (3412), an extension column (3414) welded to the nut of the lead screw member (3413), a tool (3415) clamped on the extension column (3414), and an isolation cylinder (3416) covering the outside of the extension column (3414). The stamping component (342) includes a stamping seat (3421) sleeved on the outside of the isolation cylinder (3416). The stamping seat (3421) is slidably arranged on the track extended from the first fixing frame (21), and a stamping part (3422) is movably arranged in the stamping seat (3421). The stamping part (3422) corresponds to the alignment hole (333).

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