Rubber damping wheel inner wheel and production process and processing device thereof

Abstract

A production process for an inner wheel of a rubber damping wheel comprises the steps that a steel plate is blanked to be made into a plurality of round cake materials; drawing and forming the round cake material to obtain a shoveling and rotating shaft tube raw material; spinning the shoveling and rotating shaft tube raw material into a shoveling and rotating shoulder raw material; spinning the shoveling and spinning shoulder raw material into a spinning molded surface raw material; three groups of spinning rollers are fed in sequence to rotate and extrude the spinning molded surface raw material towards the direction of the upper core mold, and after the three groups of spinning rollers are fed in sequence and retreat, a finish vehicle molded surface raw material is obtained; and processing the finish-molded surface raw material into the finished rubber damping wheel inner wheel. No scrap iron impurities are generated in the three spinning machining procedures, the material utilization rate is increased, the production takt is extremely high, production line connection production can be formed, meanwhile, hot-rolled steel plates are adopted as raw materials, on the premise that the product strength is guaranteed, a traditional technology which is high in energy consumption, heavy in pollution, low in material utilization rate and extremely slow in production takt is replaced, and the production cost is reduced. And a solution for light weight and cost reduction of the inner wheel of the rubber damping wheel is provided.

Description

Technical Field

[0001] The invention belongs to the field of processing rubber shock-absorbing wheels for automobile engines. Background Art

[0002] The inner wheel of the rubber shock-absorbing wheel is one of the components of the rubber shock-absorbing wheel assembly. In addition, the rubber shock-absorbing wheel assembly also includes an outer wheel and a rubber ring between the inner and outer wheels. These three parts are assembled together to form a rubber shock-absorbing wheel assembly. When this part with a rubber ring in the middle rotates at high speed with the engine, it has the advantages of less vibration and lower noise compared to traditional pure steel pulleys. It is widely used in wheel systems with harsh working conditions to solve the problems of strong vibration and abnormal noise.

[0003] In the production and processing of the inner wheel of the rubber shock-absorbing wheel, the traditional process usually uses a casting process to first cast a blank, and then it is made into a finished product through multiple rough turning and fine turning. First of all, casting itself is a processing technology with high energy consumption and high pollution, which is contrary to the environmental protection concept advocated by the country in recent years. Secondly, the material utilization rate of the cast blank in the product is very low, usually below 30%, and when machining the surface contour, due to the large casting allowance, a large amount of waste needs to be turned, resulting in a large amount of wear on the turning tool, and the processing rhythm is too slow, which is not conducive to assembly line production. At the same time, the casting raw materials themselves have defects such as pores, shrinkage, and microcracks, which greatly reduce the service life of the product and easily cause frequent replacement in the after-sales market, which is a huge waste of manpower, material and financial resources. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a production process for the inner wheel of a rubber shock-absorbing wheel.

[0005] The technical solution adopted by the present invention is: a production process of an inner wheel of a rubber shock-absorbing wheel, comprising:

[0006] A. Cutting: Cut the steel plate with thickness T into several round cakes; the diameter of the round cake Wherein, V is the volume of the inner wheel of the rubber shock-absorbing wheel; π is the pi; T = the thickness of the spoke plate inside the inner wheel axle tube of the rubber shock-absorbing wheel;

[0007] B. Drawing: The round cake is drawn to obtain a raw material for a shovel shaft tube. The raw material for the shovel shaft tube has a structure with a bulge inside and an arc shape on the edge, wherein the bulge protrudes with a height of The arc is R15±0.2mm;

[0008] C. Shovel-turned shaft tube: The shovel-turned shaft tube raw material processed in the previous process is spun on the spinning machine to make the shovel-turned shoulder raw material; during spinning, the shovel-turned shaft tube raw material is placed in the limiting groove C of the lower core mold C. After the spinning machine is molded, the pressure rod C presses the parts tightly, and the shovel-turned wheel C feeds to pile up the parent material at the bulge toward the center to cause plastic deformation of the metal. After the shovel-turned wheel C is fed into place, the shovel-turned shaft tube process is completed to obtain the shovel-turned shoulder raw material, and the shaft tube height is T+3mm;

[0009] D. Scrape and spin shoulder: put the scrape and spin shoulder raw material processed in the previous process into the spinning machine equipment, and spin it into the spinning surface raw material; during spinning, put the scrape and spin shoulder raw material into the limiting groove D of the lower core mold D. After the spinning machine is closed, the pressure rod D drives the upper core mold D to press the parts, and the scrape and spin wheel D is fed to pile up the parent material at the radial plate toward the center to make the metal plastically deformed. After the scrape and spin wheel D is fed into place, the scrape and spin shoulder process is completed to obtain the spinning surface raw material;

[0010] E. Spinning profile: The raw material of the spinning profile processed in the previous process is placed on the spinning machine equipment and processed into the raw material of the fine model surface. Before and after spinning in this process, the thickness deformation of the material of the spinning part is 15%-20%; during spinning, the raw material of the spinning profile is placed on the material limiting boss of the lower core mold, and the center positioning pin is used for center positioning. After the equipment is closed, three groups of spinning wheels are fed in sequence, and the parts are rotated and extruded toward the upper core mold. The three groups of spinning wheels are the curling wheel, the flat spinning wheel, and the forming wheel. After the three groups of spinning wheels are fed and retracted in sequence, the spinning machine equipment opens the mold upward and returns, and the upper and lower material retracting mechanisms withdraw the parts. At this time, the spinning profile process is completed and the raw material of the fine model surface is obtained;

[0011] F. Finished surface: The finished surface raw materials processed in the previous process are processed by CNC lathe to make the inner wheel of the finished rubber shock absorber wheel. The inner wheel of the finished rubber shock absorber wheel has a finished arc concave inward, and this finished arc corresponds to the axial direction of the outer wheel of the rubber shock absorber.

[0012] The specific process A is as follows: using a 250T punch press, a 6mm thick SPHE steel plate is cut into a plurality of round cakes.

[0013] In process E, the main cylinder pressure required by the spinning machine is 13MPa, the side cylinder pressure is 13MPa, the main cylinder fast feed speed is 40mm / s-50mm / s, the working feed speed is 5mm / s-10mm / s, the curling wheel fast feed speed is 40mm / s-50mm / s, the working feed speed is 2.0mm / s-2.5mm / s, the flat spinning wheel fast feed speed is 40mm / s-50mm / s, the working feed speed is 1.5mm / s-2.0mm / s, the forming wheel fast feed speed is 40mm / s-50mm / s, and the working feed speed is 0.8mm / s-1.2mm / s.

[0014] The present invention also provides a rubber shock-absorbing wheel inner wheel spinning processing device, including a spinning machine equipment and a surface spinning tool; the surface spinning tool includes a lower core mold and an upper core mold D connected to the spinning machine equipment for clamping the parts to be processed (spinning surface raw materials), and three sets of spinning wheels installed on the spinning machine equipment spinning wheel seat for spinning in three steps.

[0015] The three groups of rotating wheels are a group of curling wheels, a group of flat rotating wheels, and a group of forming wheels; the middle of the curling wheel profile is a large arc of R103±0.5mm, and the two sides are transitioned to R1, and the right quadrant point of the large arc deviates from the center line of the curling wheel by 2mm±0.1mm upward; the flat rotating wheel profile has a slope of 2°±0.1°, and the two sides are transitioned to R1; the forming wheel profile has a R13.2mm±0.1mm arc in the middle, and the arc and the two side profiles are transitioned to R5mm±0.1mm, and the profile and the two end surfaces are transitioned to R1.

[0016] The lower core mold is provided with a material limiting boss; a center positioning pin is provided at the center hole of the lower core mold; a lower material return mechanism is provided at the lower part of the center positioning pin; the lower material return mechanism includes a lower pad connected to the lower end of the center positioning pin, a lower pressure plate fixedly connected to the upper core mold D, and a polyurethane material return device placed between the lower pad and the lower pressure plate.

[0017] The center positioning pin is in the form of a stepped shaft structure with a larger upper portion and a smaller lower portion; the outer diameter of the lower pad is larger than the outer diameter of the small step portion of the center positioning pin; the inner wall of the center hole of the lower core mold is provided with a convex edge for cooperating with the step portion of the center positioning pin and the lower pad to limit the position.

[0018] An upper material ejection mechanism is provided inside the upper core mold D; the upper material ejection mechanism includes an upper ejector installed at the center hole of the upper core mold, an upper pad connected to the upper end of the upper ejector, an upper pressure plate fixed on the spinning machine equipment, and a polyurethane ejector 2 placed between the upper pad and the upper pressure plate.

[0019] The upper ejector is in a stepped shaft-like structure with a small upper portion and a large lower portion; the outer diameter of the upper cushion block is larger than the outer diameter of the small step portion of the upper ejector; and the inner wall of the center hole of the upper core mold is provided with a flange for the upper cushion block and the step portion of the upper ejector to cooperate and limit.

[0020] It also includes axle tube spinning tooling and shoulder spinning tooling;

[0021] The shaft tube spinning tooling comprises a lower core mold C and a pressure rod C that cooperates with the lower core mold C to clamp the part to be processed to form the shaft tube portion; the lower core mold C is provided with a material limiting groove C;

[0022] The shoulder spinning tooling includes a lower core mold D and an upper core mold D that cooperates with the lower core mold D to clamp the part to be processed to form the shoulder part; the upper core mold D is connected to the spinning machine equipment through a pressure rod D; and the lower core mold D is provided with a material limiting groove D.

[0023] The present invention also provides a rubber shock-absorbing wheel inner wheel manufactured by using the rubber shock-absorbing wheel inner wheel production process.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the production process provided by the present invention solves the drawbacks of the casting process, such as high energy consumption, high pollution, low material utilization rate, long production cycle, and safety defects of raw materials. It can achieve the goal of no iron cutting impurities in the three spinning processing steps, thereby improving the material utilization rate, and the production cycle is extremely fast, which can form a production line for continuous production. At the same time, hot-rolled steel plates are used as raw materials. Under the premise of ensuring the strength of the product, the casting process with high energy consumption, heavy pollution, low material utilization rate, and extremely slow production cycle is replaced, and a solution for lightweighting and reducing the cost of processing the inner wheel of the rubber shock-absorbing wheel is provided, thereby improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the inner wheel of the rubber shock-absorbing wheel of this product;

[0026] Figure 2 This is a schematic diagram of the round cake material after blanking and forming;

[0027] Figure 3 This is a schematic diagram of the raw material of the shovel spindle tube after drawing;

[0028] Figure 4 This is a schematic diagram of the raw materials of the shovel rotary shoulder after the shovel rotary shaft tube;

[0029] Figure 5 This is a schematic diagram of the raw material of the shovel-spin shoulder and the spinning profile;

[0030] Figure 6 This is a schematic diagram of the raw material after finishing the spinning surface;

[0031] Figure 7 It is a schematic diagram of the shaft tube spinning tooling;

[0032] Figure 8 It is a schematic diagram of the shoulder spinning tooling;

[0033] Fig. 9 It is a schematic diagram of the surface spinning tooling;

[0034] Fig.10 It is a schematic diagram of the crimping wheel;

[0035] Fig.11 It is a schematic diagram of a flat-rotating wheel;

[0036] Fig.12 It is a schematic diagram of the forming wheel.

[0037] In the figure, 1, inner wheel of rubber shock-absorbing wheel; 2, round cake material; 3, raw material of shovel-turned shaft tube; 4, raw material of shovel-turned shoulder; 5, raw material of spinning surface; 6, raw material of fine-turned surface; 101, bulge; 102, arc; 103, fine-turned arc; 200, pressure rod C; 201, lower core mold C; 202, limiting groove C; 203, exhaust hole; 204, shovel-turned wheel C; 205, lower core mold D; 206, limiting groove D; 207, exhaust hole; 208, shovel-turned wheel D; 209, pressure rod D; 210, upper core Mould D; 211, lower core mould; 212, centre locating pin; 213, lifting hole; 214, lower pad; 215, polyurethane ejector 1; 216, lower pressure plate; 217, upper core mould; 218, upper ejector; 219, upper pad; 220, polyurethane ejector 2; 221, upper pressure plate; 222, curling wheel; 223, flat rotary wheel; 224, forming wheel; 226, ejector; 227, ejector; 228, material limiting boss; 229, upper stopper; 230, lower stopper; 231, rotary wheel seat. DETAILED DESCRIPTION

[0038] A first aspect of the present invention provides a process for producing an inner wheel of a rubber shock-absorbing wheel, comprising the following steps:

[0039] A. Cutting: Use a 250T punch press to cut 6mm thick SPHE steel plates into several round cakes 2, such as Figure 2 As shown; the calculation formula for cake diameter is: Among them, it is known that V is the inner wheel volume of the rubber shock-absorbing wheel; π is the pi; T is the thickness of the SPHE steel plate, 6 mm.

[0040] B. Drawing: Use a hydraulic press to draw the round cake material 2 to obtain the shovel shaft tube raw material 3, such as Figure 3 As shown, the raw material 3 of the shovel rotary shaft tube is a structure with a bulge 101 inside and an arc 102 on the edge, which is convenient for forming in the subsequent process, wherein the protruding height of the bulge 101 is 1mm, and the arc 102 is R15mm.

[0041] C. Shovel-spinning shaft tube (single spinning): The shovel-spinning shaft tube raw material 3 processed in the above sequence is spun on the spinning machine to make the shovel-spinning shoulder raw material 4, such as Figure 4shown.

[0042] First, the lower core mold C201 is fixed to the lower connection seat of the spinning machine with bolts, and then the ejector 226 is placed in the lower core mold C201. At this time, the lower half of the spinning tooling is installed. Then the pressure rod C200 is fixed to the upper connection seat of the spinning machine with bolts, and the shovel wheel C204 is installed on the wheel seat. At this time, the upper half of the spinning tooling and the wheel are installed.

[0043] Start the spinning machine, reset the shovel wheel C204 back to the coordinate origin, reset the upper part upward and back to the coordinate origin, place the shovel rotary shaft tube raw material 3 on the ejector 226, and perform center positioning through the limiting groove C202 of the lower core mold C201. Start the processing button, and the main cylinder hydraulic servo system of the spinning machine drives the entire upper part to feed downward until the upper part and the lower part are molded together. Then the spinning machine starts to rotate. At the same time, the side cylinder hydraulic servo system of the spinning machine drives the rotary wheel seat connected to the shovel wheel C204 to feed the shovel rotary shaft tube raw material 3 quickly. When it is about to contact the processed part, the side cylinder hydraulic servo system starts to convert to slow working Feed forward and squeeze the material at the bulge 101 inward until the entire spinning process is completed. After the shovel wheel C204 is fed into place in the center direction, the shovel shoulder raw material can be obtained. At this time, the shovel wheel C204 and the wheel seat are driven by the side cylinder hydraulic servo system to retreat to the coordinate origin. At the same time, the entire upper part is also driven by the main cylinder hydraulic servo system to retreat to the coordinate origin. Then the ejector rod of the spinning machine starts to feed upward, driving the ejector 226 to feed upward together. The completed parts are ejected by the ejector 226, and the obtained shovel shoulder raw material is taken out. The entire processing process of this step is completed.

[0044] D. Shoulder shoveling (secondary spinning): Put the shoulder shoveling material 4 processed in the previous process into the spinning machine equipment and process it into the spinning surface material 5, such as Figure 5 shown.

[0045] During spinning, the shoulder raw material 4 is placed in the limiting groove D206 of the lower core mold D205. The lower core mold D205 is provided with an exhaust hole 207 to facilitate the discharge of air in the limiting groove D206 when the part is placed. After the spinning machine is closed, the pressure rod D209 drives the upper core mold D210 to press the part, and the shovel wheel D208 is fed to pile up the parent material at the spoke plate toward the center, causing the metal to undergo plastic deformation. After the shovel wheel D208 is fed into place, the shoulder process is completed to obtain the spinning surface raw material 5.

[0046] E. Spinning profile (three-time spinning): the spinning profile raw material 5 processed in the previous process is placed on the spinning machine equipment and processed into a fine-finished profile raw material 6; during spinning, the spinning profile raw material 5 is placed at the limiting boss 228 of the lower core mold 211, and the center positioning pin 212 is used for center positioning. After the spinning machine is molded, the upper material withdrawal mechanism and the upper core mold 217 press the part tightly. After the equipment is closed, three groups of spinning wheels are fed in sequence to rotate and extrude the part toward the upper core mold 217. The three groups of spinning wheels are a curling wheel 222, a flat spinning wheel 223, and a forming wheel 224. After the three groups of spinning wheels are fed and withdrawn in sequence, the spinning machine equipment opens the mold upward and returns, and the upper material withdrawal mechanism and the lower material withdrawal mechanism withdraw the part, so that the operator can remove the part easily. At this time, the spinning profile process is completed to obtain the fine-finished profile raw material 6.

[0047] Before and after spinning, the material thickness deformation is 15%-20%. If the deformation is too large, the parent material will form peeling and wrinkles close to the upper core mold 217 during spinning. If the deformation is too small, it will cause waste of raw materials and reduce material utilization.

[0048] The main cylinder pressure required for the spinning machine is 13MPa, the side cylinder pressure is 13MPa, the main cylinder fast feed speed is 40mm / s-50mm / s, the working feed speed is 5mm / s-10mm / s, the curling wheel 222 fast feed speed is 40mm / s-50mm / s, the working feed speed is 2.0mm / s-2.5mm / s, the flat spinning wheel 223 fast feed speed is 40mm / s-50mm / s, the working feed speed is 1.5mm / s-2.0mm / s, the forming wheel 224 fast feed speed is 40mm / s-50mm / s, and the working feed speed is 0.8mm / s-1.2mm / s.

[0049] F. Finishing the surface: Put the finished surface material processed in the previous process into the CNC lathe fixture, and process it into the finished rubber shock-absorbing wheel inner wheel 1 after programming. Figure 1 As shown, the inner wheel 1 of the finished rubber shock absorber wheel has a fine-machined arc 103 that is concave inward, and the fine-machined arc 103 corresponds to the axial direction of the outer wheel of the rubber shock absorber.

[0050] This production process includes blanking, drawing, scraping and spinning shaft tubes, scraping and spinning shoulders, spinning surfaces, and finishing surfaces. There is no waste output during the spinning process, and the material utilization rate is increased to more than 80%. At the same time, the spinning process is a low-energy consumption, zero-pollution process, which actively responds to the national environmental protection call, and the spinning process has a fast processing cycle, which can form a production line connection production. Compared with the casting process and machining process, the processing cycle is accelerated by more than 90%. The raw material used is hot-rolled SPHE steel plate, which is very common in the market and the hot-rolled steel plate itself has high strength. During market use, the product will not fail due to the strength of the raw materials, thereby improving the competitiveness of the product.

[0051] The second aspect of the present invention provides a spinning processing device for the inner wheel of a rubber damping wheel, comprising a spinning machine and a spinning tool connected to the spinning machine. The spinning tool comprises an axle tube spinning tool, a shoulder spinning tool, and a profile spinning tool.

[0052] like Figure 7 As shown, the shaft tube spinning tooling includes a lower core mold C201, a pressure rod C and a shovel wheel C204 that cooperate with the lower core mold C201 to clamp the part to be processed (shovel-spin shaft tube raw material 3) to form the shaft tube part; the lower core mold C201 is provided with a material limiting groove C202. The profile shape of the shovel wheel C204 is adapted to the shape of the shaft tube part to be formed.

[0053] The lower core mold C201 is provided with an exhaust hole 203 to facilitate exhausting the air in the limiting groove C202 when the parts are placed.

[0054] The ejector 226 and the lower core mold C201 have a clearance fit, wherein the clearance is between 0.02mm-0.05mm, which can ensure that the two are concentric; the limiting groove C202 of the lower core mold C201 and the shovel rotary shaft tube raw material 3 have a clearance fit, wherein the clearance is between 0.2mm-0.3mm.

[0055] like Figure 8 As shown, the shoulder spinning tooling includes a lower core mold D205, an upper core mold D210 and a shovel wheel D208 that cooperate with the lower core mold D205 to clamp the part to be processed (shovel shoulder raw material 4) to form the shoulder part; the upper core mold D210 is connected to the spinning machine equipment through a pressure rod D209; the lower core mold D205 is provided with a material limiting groove D206. The profile shape of the shovel wheel D208 is adapted to the shape of the shoulder part to be formed.

[0056] The lower core mold D205 is provided with an exhaust hole 207 to facilitate exhausting the air in the limiting groove D206 when the parts are placed.

[0057] The ejector 227 and the lower core mold D205 have a clearance fit, wherein the clearance is between 0.02mm-0.05mm, which can ensure that the two are concentric; the limiting groove D206 of the lower core mold D205 has a clearance fit with the shovel shoulder raw material 4, wherein the clearance is between 0.2mm-0.3mm.

[0058] like Fig. 9 As shown, the profile spinning tooling includes a lower core mold 211 and an upper core mold 217 connected to the spinning machine for clamping the part to be processed (spinning profile raw material 5), and three sets of spinning wheels mounted on the spinning machine for spinning in three steps. The lower core mold 211 has a lifting hole 213 to facilitate the mold to be installed on the spinning machine.

[0059] The upper pad 219 and the upper ejector 218 are assembled together to form an upper material removal mechanism with the upper pressure plate 221 and the second polyurethane material removal device 220. The upper pressure plate 221 is welded to the spinning machine equipment. The upper ejector 218 is installed at the center hole of the upper core mold 217. After the spinning machine is closed, the upper material removal mechanism and the upper core mold 217 press the parts tightly, and the upper material removal mechanism and the lower end surface of the upper core mold 217 are flush. The upper ejector 218 is a stepped shaft structure with a small upper part and a large lower part; the outer diameter of the upper pad 219 is larger than the outer diameter of the small step portion of the upper ejector 218; the inner wall of the center hole of the upper core mold 217 is provided with a flange for the upper pad 219 and the step portion of the upper ejector 218 to cooperate and limit. The upper pad 219 is fixed to the upper end of the upper ejector 218 by the upper fixing bolt; the lower end surface of the second polyurethane material removal device 220 is provided with a lower positioning hole that cooperates with the large head of the upper fixing bolt for positioning.

[0060] The lower core mold 211 is equipped with a lower material stripping mechanism. The lower material stripping mechanism consists of three parts, namely: a lower pad 214, a polyurethane stripper 215, and a lower pressing plate 216. The lower pad 214 is connected to the lower end of the center positioning pin 212, the lower pressing plate 216 is fixedly connected to the lower core mold 211, and the polyurethane stripper 215 is placed between the lower pad 214 and the lower pressing plate 216. The center positioning pin 212 is a stepped shaft structure with a large upper part and a small lower part; the outer diameter of the lower pad 214 is larger than the outer diameter of the small step portion of the center positioning pin 212; the inner wall of the center hole of the lower core mold 211 is provided with a convex edge for cooperating with the step portion of the center positioning pin 212 and the lower pad 214 to limit the position. The lower pad 214 is fixed to the lower end of the center positioning pin 212 by a lower fixing bolt; the upper end surface of the polyurethane stripper 215 is provided with an upper positioning hole for cooperating with the large head of the lower fixing bolt for positioning.

[0061] The center locating pin 212 has a clearance fit with the lower core mold 211, wherein the clearance is between 0.02mm-0.05mm, which can ensure that the two are concentric; the limiting boss 228 of the lower core mold 211 has a clearance fit with the inner and outer sides of the spinning surface raw material 5, wherein the clearance is between 0.5mm-0.6mm; the upper ejector 218 has a clearance fit with the upper core mold 217, wherein the clearance is between 0.02mm-0.05mm.

[0062] The upper core mold 217 and the upper stop 229 of the spinning machine equipment have a clearance fit, wherein the clearance is 0.02mm-0.05mm, ensuring that the upper core mold 217 coincides with the center of the spinning machine; the lower core mold 211 and the lower stop 230 of the spinning machine equipment have a clearance fit, wherein the clearance is 0.02mm-0.05mm, ensuring that the lower core mold 211 coincides with the center of the spinning machine;

[0063] Three sets of spinning wheels: a curling wheel 222, a flat spinning wheel 223, and a forming wheel 224 are mounted on a spinning wheel seat 231. Driven by the hydraulic servo system of the side cylinder of the spinning machine, the spinning wheels can realize radial feeding and retraction. The three spinning wheels feed and retract in sequence to complete the entire spinning process.

[0064] like Fig.10 As shown, the middle of the curling wheel 222 profile is a large arc of R103±0.5mm, and the two sides are in the shape of R1 transition, and the right quadrant point of the large arc deviates from the center line of the curling wheel 222 by 2mm±0.1mm upward, so that when the curling wheel 222 is fed, the base material can undergo plastic deformation and flow upward more easily.

[0065] like Fig.11 As shown, the flat wheel 223 has a surface with a slope of 2°±0.1°, and both sides are in a transition shape of R1, so that when the flat wheel 223 is fed, the base material can be plastically deformed and flow upward more easily.

[0066] like Fig.12 As shown, the molding wheel 224 has an arc of R13.2mm±0.1mm in the middle, the arc and the two side surfaces are transitioned by R5mm±0.1mm, and the surface and the two end surfaces are transitioned by R1, so that when the molding wheel 224 is fed, the outer circle shape of the inner wheel 1 of the final rubber shock-absorbing wheel can be obtained.

Claims

1. A rubber shock-absorbing wheel inner wheel production process, characterized in that: include: A. Cutting: Cut the steel plate with thickness T into several round cakes; the diameter of the round cake Wherein, V is the volume of the inner wheel of the rubber shock-absorbing wheel; π is the pi; T = the thickness of the spoke plate inside the inner wheel axle tube of the rubber shock-absorbing wheel; B. Drawing: The round cake is drawn to obtain a raw material for a shovel shaft tube. The raw material for the shovel shaft tube has a structure with a bulge inside and an arc shape on the edge, wherein the bulge protrudes with a height of The arc is R15±0.2mm; C. Shovel-turned shaft tube: The shovel-turned shaft tube raw material processed in the previous process is spun on the spinning machine to make the shovel-turned shoulder raw material; during spinning, the shovel-turned shaft tube raw material is placed in the limiting groove C of the lower core mold C. After the spinning machine is molded, the pressure rod C presses the parts tightly, and the shovel-turned wheel C feeds to pile up the parent material at the bulge toward the center to cause plastic deformation of the metal. After the shovel-turned wheel C is fed into place, the shovel-turned shaft tube process is completed to obtain the shovel-turned shoulder raw material, and the shaft tube height is T+3mm; D. Scrape and spin shoulder: put the scrape and spin shoulder raw material processed in the previous process into the spinning machine equipment, and spin it into the spinning surface raw material; during spinning, put the scrape and spin shoulder raw material into the limiting groove D of the lower core mold D. After the spinning machine is closed, the pressure rod D drives the upper core mold D to press the parts, and the scrape and spin wheel D is fed to pile up the parent material at the radial plate toward the center to make the metal plastically deformed. After the scrape and spin wheel D is fed into place, the scrape and spin shoulder process is completed to obtain the spinning surface raw material; E. Spinning profile: The raw material of the spinning profile processed in the previous process is placed on the spinning machine equipment and processed into the raw material of the fine model surface. Before and after spinning in this process, the thickness deformation of the material of the spinning part is 15%-20%; during spinning, the raw material of the spinning profile is placed on the material limiting boss of the lower core mold, and the center positioning pin is used for center positioning. After the equipment is closed, three groups of spinning wheels are fed in sequence, and the parts are rotated and extruded toward the upper core mold. The three groups of spinning wheels are the curling wheel, the flat spinning wheel, and the forming wheel. After the three groups of spinning wheels are fed and retracted in sequence, the spinning machine equipment opens the mold upward and returns, and the upper and lower material retracting mechanisms withdraw the parts. At this time, the spinning profile process is completed and the raw material of the fine model surface is obtained; F. Finished surface: The finished surface raw materials processed in the previous process are processed by CNC lathe to make the inner wheel of the finished rubber shock absorber wheel. The inner wheel of the finished rubber shock absorber wheel has a finished arc concave inward, and this finished arc corresponds to the axial direction of the outer wheel of the rubber shock absorber.

2. The process for producing the inner wheel of a rubber shock-absorbing wheel according to claim 1, characterized in that: The specific process A is as follows: using a 250T punch press, a 6mm thick SPHE steel plate is cut into a plurality of round cakes.

3. The process for producing the inner wheel of the rubber shock-absorbing wheel according to claim 1, characterized in that: In process E, the main cylinder pressure required by the spinning machine is 13MPa, the side cylinder pressure is 13MPa, the main cylinder fast feed speed is 40mm / s-50mm / s, the working feed speed is 5mm / s-10mm / s, the curling wheel fast feed speed is 40mm / s-50mm / s, the working feed speed is 2.0mm / s-2.5mm / s, the flat spinning wheel fast feed speed is 40mm / s-50mm / s, the working feed speed is 1.5mm / s-2.0mm / s, the forming wheel fast feed speed is 40mm / s-50mm / s, and the working feed speed is 0.8mm / s-1.2mm / s.

4. A rubber shock-absorbing wheel inner wheel spinning processing device, including a spinning machine, characterized in that: It includes a profile spinning tool; the profile spinning tool includes a lower core mold and an upper core mold connected to a spinning machine for clamping a part to be processed, and three sets of spinning wheels installed on a spinning wheel seat of the spinning machine for spinning in three steps; The three groups of rotating wheels are a group of curling wheels, a group of flat rotating wheels, and a group of forming wheels; the middle of the curling wheel profile is a large arc of R103±0.5mm, and the two sides are transitioned to R1, and the right quadrant point of the large arc deviates from the center line of the curling wheel by 2mm±0.1mm upward; the flat rotating wheel profile has a slope of 2°±0.1°, and the two sides are transitioned to R1; the forming wheel profile has a R13.2mm±0.1mm arc in the middle, and the arc and the two side profiles are transitioned to R5mm±0.1mm, and the profile and the two end surfaces are transitioned to R1.

5. The inner wheel spinning processing device of the rubber shock-absorbing wheel according to claim 4 is characterized in that: The lower core mold is provided with a material limiting boss; a center positioning pin is provided at the center hole of the lower core mold; a lower material return mechanism is provided at the lower part of the center positioning pin; the lower material return mechanism includes a lower pad connected to the lower end of the center positioning pin, a lower pressure plate fixedly connected to the upper core mold D, and a polyurethane material return device placed between the lower pad and the lower pressure plate.

6. The inner wheel spinning processing device of the rubber shock absorbing wheel according to claim 5 is characterized in that: The center positioning pin is in the form of a stepped shaft structure with a larger upper portion and a smaller lower portion; the outer diameter of the lower pad is larger than the outer diameter of the small step portion of the center positioning pin; the inner wall of the center hole of the lower core mold is provided with a convex edge for cooperating with the step portion of the center positioning pin and the lower pad to limit the position.

7. The inner wheel spinning processing device of the rubber shock absorbing wheel according to claim 4 is characterized in that: An upper material ejector mechanism is provided inside the upper core mold; the upper material ejector mechanism includes an upper ejector installed at the center hole of the upper core mold, an upper pad connected to the upper end of the upper ejector, an upper pressure plate fixed on the spinning machine equipment, and a polyurethane ejector placed between the upper pad and the upper pressure plate.

8. The inner wheel spinning processing device of the rubber shock-absorbing wheel according to claim 7 is characterized in that: The upper ejector is in a stepped shaft-like structure with a small upper portion and a large lower portion; the outer diameter of the upper cushion block is larger than the outer diameter of the small step portion of the upper ejector; and the inner wall of the center hole of the upper core mold is provided with a flange for the upper cushion block and the step portion of the upper ejector to cooperate and limit.

9. The inner wheel spinning processing device of the rubber shock-absorbing wheel according to claim 4, characterized in that: It also includes axle tube spinning tooling and shoulder spinning tooling; The shaft tube spinning tooling comprises a lower core mold C and a pressure rod C that cooperates with the lower core mold C to clamp the part to be processed to form the shaft tube portion; the lower core mold C is provided with a material limiting groove C; The shoulder spinning tooling includes a lower core mold D and an upper core mold D that cooperates with the lower core mold D to clamp the part to be processed to form the shoulder part; the upper core mold D is connected to the spinning machine equipment through a pressure rod D; and the lower core mold D is provided with a material limiting groove D.

10. A rubber shock-absorbing wheel inner wheel manufactured using the rubber shock-absorbing wheel inner wheel production process according to any one of claims 1 to 3.

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