Rubber shock absorbing wheel and its production process and processing device

Abstract

A rubber shock absorbing wheel inner wheel production process, comprising: blanking a steel plate into a plurality of circular cakes; drawing the circular cakes into a shovel rotation shaft pipe raw material; spinning the shovel rotation shaft pipe raw material into a shovel rotation shoulder pipe raw material; spinning the shovel rotation shoulder pipe raw material into a spinning profile raw material; feeding three groups of spinning wheels in turn to extrude the spinning profile raw material upward to the direction of the core mold while rotating, and after the three groups of spinning wheels are fed in turn and withdrawn, a finish machining profile raw material is obtained; and processing the finish machining profile raw material into a finished rubber shock absorbing wheel inner wheel. The present application can realize no iron cutting impurities in three spinning machining processes, improve the material utilization rate, and the production rhythm is extremely fast, can form a production line connected production, at the same time, using hot-rolled steel plate as raw material, on the premise of ensuring the strength of the product, replacing the traditional process with high energy consumption, heavy pollution, low material utilization rate and extremely slow production rhythm, providing a lightweight and cost reduction solution for processing rubber shock absorbing wheel inner wheel.

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. This part with a rubber ring in the middle has the advantages of less vibration and lower noise when working with the high-speed rotation of the engine 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 process with high energy consumption and high pollution. Secondly, the material utilization rate of the cast blank in the product is very low, usually below 30%. In addition, 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 a slow processing cycle, 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 lead to 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 deficiencies in the prior art and to 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 for the 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 is D = , where V is the volume of the inner wheel of the rubber shock-absorbing wheel; π is the pi; T = the thickness of the inner spoke of the inner wheel axle tube of the rubber shock-absorbing wheel;

[0007] B. Drawing: The round cake is drawn to obtain the raw material of the shovel shaft tube. The raw material of 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 T, arc is R15±0.2mm;

[0008] C. Shovel-spinning shaft tube: The shovel-spinning shaft tube material processed in the previous process is spun on the spinning machine to produce the shovel-spinning shoulder material. During spinning, the shovel-spinning shaft tube material is placed in the limiting groove C of the lower core mold C. After the spinning machine is closed, the pressure rod C presses the part tightly, and the shovel-spinning wheel C feeds in, stacking the parent material at the bulge toward the center to cause plastic deformation of the metal. After the shovel-spinning wheel C is fed into place, the shovel-spinning shaft tube process is completed, and the shovel-spinning shoulder material is obtained. The shaft tube height is T+3mm.

[0009] D. Scraping shoulders: The scraping shoulder raw materials processed in the previous process are placed on the spinning machine equipment and spun into the spinning surface raw materials; during spinning, the scraping shoulder raw materials are placed in 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 scraping wheel D is fed to accumulate the parent material at the web toward the center, causing the metal to undergo plastic deformation. After the scraping wheel D is fed into place, the scraping shoulder process is completed and the spinning surface raw materials are obtained;

[0010] E. Spinning surface: The spinning surface raw material processed in the previous process is placed on the spinning machine equipment and processed into the raw material for the fine model surface. Before and after spinning in this process, the thickness deformation of the material in the spinning part is 15%-20%; during spinning, the spinning surface raw material 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 sets of spinning wheels are fed in sequence, and the parts are rotated and extruded toward the upper core mold. The three sets of spinning wheels are the curling wheel, the flat spinning wheel, and the forming wheel. After the three sets 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 removal mechanisms remove the parts. At this time, the spinning surface process is completed and the fine model surface raw material is obtained;

[0011] F. Finishing the surface: The raw materials of the finishing surface processed in the previous process are processed into the inner wheel of the finished rubber shock absorber wheel using a CNC lathe. The inner wheel of the finished rubber shock absorber wheel has a finishing arc concave inward, and this finishing 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 blanked 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's 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 the shape of R1, and the right quadrant point of the large arc deviates 2mm±0.1mm upward from the center line of the curling wheel; the flat-rotating wheel profile has a slope of 2°±0.1°, and the two sides are transitioned to the shape of R1; the forming wheel profile has a R13.2mm±0.1mm arc in the middle, and the arc and the profiles on both sides are transitioned to R5mm±0.1mm, and the profile and the two end faces 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 returner placed between the lower pad and the lower pressure plate.

[0017] The center positioning pin is a stepped shaft structure with a larger upper part and a smaller lower part; the outer diameter of the lower pad is larger than the outer diameter of the small step part 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 part 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 material ejector placed between the upper pad and the upper pressure plate.

[0019] The upper ejector is a stepped shaft structure with a small upper portion and a large lower portion; the outer diameter of the upper pad is larger than the outer diameter of the small step portion of the upper ejector; the inner wall of the center hole of the upper core mold is provided with a flange for the upper pad 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 includes 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; 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 using the above-mentioned rubber shock-absorbing wheel inner wheel production process.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the production process provided by the present invention solves the disadvantages of the casting process such as high energy consumption, high pollution, low material utilization rate, long production cycle, and raw material safety defects, and can achieve the goal of no iron cutting impurities generated 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 connected production. At the same time, hot-rolled steel plates are used as raw materials. Under the premise of ensuring product strength, it replaces the casting process with high energy consumption, heavy pollution, low material utilization rate, and extremely slow production cycle, and provides a solution for lightweighting and reducing the cost of processing the inner wheel of the rubber shock-absorbing wheel, 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 back spinning profile;

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

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

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

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

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

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

[0036] Figure 12 This 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, shovel shaft tube material; 4, shovel shoulder material; 5, spinning surface material; 6, finishing surface material; 101, bulge; 102, arc; 103, finishing arc; 200, pressure rod C; 201, lower core mold C; 202, limiting groove C; 203, exhaust hole; 204, shovel wheel C; 205, lower core mold D; 206, limiting groove D; 207, exhaust hole; 208, shovel wheel D; 209, pressure rod D; 210, upper core Mold D; 211, lower core mold; 212, center locating pin; 213, lifting hole; 214, lower pad; 215, polyurethane stripper 1; 216, lower pressure plate; 217, upper core mold; 218, upper ejector; 219, upper pad; 220, polyurethane stripper 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 stop; 230, lower stop; 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. Blanking: Use a 250T punch press to blank 6mm thick SPHE steel plates into several round cakes 2, such as Figure 2 As shown; the calculation formula for cake diameter is: D= , where V is the inner wheel volume of the rubber shock-absorbing wheel; π is the pi; and 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 a circular arc 102 on the edge, which is convenient for forming in subsequent processes; wherein the protruding height of the bulge 101 is 1mm, and the circular arc 102 is R15mm.

[0041] C. Shovel spindle tube (one-time spinning): The shovel spindle tube material 3 processed in the previous sequence is spun on the spinning machine to form the shovel spin shoulder material 4, such as Figure 4shown.

[0042] First, bolt the lower core mold C201 to the lower connection seat of the spinning machine, then place the ejector 226 into the lower core mold C201. At this point, the lower half of the spinning tooling is installed. Then, bolt the pressure rod C200 to the upper connection seat of the spinning machine, and install the shovel wheel C204 into the wheel seat. At this point, 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 return it 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 hydraulic servo system of the main cylinder of the spinning machine drives the entire upper part to feed downward until the upper and lower parts are molded together. Then the spinning machine starts to rotate. At the same time, the hydraulic servo system of the side cylinder 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 hydraulic servo system of the side cylinder 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 spun 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. Shovel shoulder (secondary spinning): put the shovel shoulder 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 tightly, and the shovel wheel D208 is fed to accumulate the parent material at the web 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 the fine-molded surface raw material 6; during spinning, the spinning profile raw material 5 is placed on the material 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 return 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 the curling wheel 222, the flat spinning wheel 223, and the forming wheel 224. After the three groups of spinning wheels are fed and returned in sequence, the spinning machine equipment opens the mold upward and returns, and the upper material return mechanism and the lower material return mechanism withdraw the part, making it easy for the operator to remove the part. At this time, the spinning profile process is completed and the fine-molded surface raw material 6 is obtained.

[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 near 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 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 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 of 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-turned arc 103 that is concave inward, and the fine-turned 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 the shaft tube, scraping and spinning the shoulder, spinning the surface, and finishing the surface. No waste is produced during the spinning process, and the material utilization rate is increased to more than 80%. In addition, the spinning process has a fast processing cycle, which can form a production line for connected 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 material, thereby improving the competitiveness of the product.

[0051] The second aspect of the present invention provides a spinning device for the inner wheel of a rubber shock-absorbing 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 spindle spinning tooling includes a lower core mold C201, a pressure rod C that cooperates with the lower core mold C201 to clamp the part to be processed (shoveling the spindle raw material 3) to form the spindle portion. The lower core mold C201 is provided with a material limiting groove C202. The shoveling wheel C204 has a profile that matches the shape of the spindle portion to be formed.

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

[0054] The ejector 226 has a clearance fit with the lower core mold C201, 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 has a clearance fit with the shovel rotary shaft tube raw material 3, wherein the clearance is between 0.2mm-0.3mm.

[0055] like Figure 8 As shown, the shoulder spinning tooling consists of a lower core mold D205, an upper core mold D210 that works with the lower core mold D205 to clamp the part to be processed (shoulder raw material 4) to form the shoulder area, and a shovel wheel D208. The upper core mold D210 is connected to the spinning machine via a pressure rod D209. The lower core mold D205 is equipped with a material limiting groove D206. The shovel wheel D208 has a profile that matches the shape of the shoulder area to be formed.

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

[0057] The ejector 227 is clearance-matched with the lower core mold D205, 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 is clearance-matched with the shovel shoulder raw material 4, wherein the clearance is between 0.2mm-0.3mm.

[0058] like Figure 9 As shown, the surface spinning tooling includes a lower core mold 211 and an upper core mold 217, which are connected to the spinning machine to clamp the part to be processed (the spinning surface raw material 5). Three sets of rollers are mounted on the roller base of the spinning machine to perform three-step spinning. The lower core mold 211 has lifting holes 213 to facilitate the mold's installation on the spinning machine.

[0059] The upper pad 219 and upper ejector 218 are assembled together, forming the upper ejector mechanism along with the upper pressure plate 221 and the second polyurethane ejector 220. The upper pressure plate 221 is welded to the spinning machine. The upper ejector 218 is mounted on the center hole of the upper core mold 217. After the spinning machine is closed, the upper ejector mechanism and the upper core mold 217 compress the part, and the upper ejector mechanism and the lower end surface of the upper core mold 217 are flush. The upper ejector 218 has a stepped shaft structure with a smaller upper portion and a larger lower portion. The outer diameter of the upper pad 219 is larger than the outer diameter of the smaller 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 stepped portion of the upper ejector 218 to fit in place. The upper pad 219 is fixed to the upper end of the upper ejector 218 by an upper fixing bolt. The lower end surface of the second polyurethane ejector 220 has a lower locating hole that mates with the larger head of the upper fixing bolt.

[0060] The lower core mold 211 is equipped with a lower material removal mechanism. The lower material removal mechanism consists of three parts: a lower pad 214, a polyurethane material remover 215, and a lower pressure plate 216. The lower pad 214 is connected to the lower end of the center positioning pin 212, the lower pressure plate 216 is fixedly connected to the lower core mold 211, and the polyurethane material remover 215 is placed between the lower pad 214 and the lower pressure plate 216. The center positioning pin 212 is a stepped shaft structure with a larger upper portion and a smaller lower portion; 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 material remover 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 material 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, and the clearance is between 0.02mm-0.05mm.

[0062] The upper core mold 217 and the upper stop 229 of the spinning machine have a clearance fit of 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 have a clearance fit of 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: curling wheel 222, flat spinning wheel 223, and forming wheel 224 are installed on the 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 Figure 10 As shown, the middle of the curling wheel 222 profile is a large arc of R103±0.5mm, and both 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 upward by 2mm±0.1mm, so that when the curling wheel 222 is fed, the base material can undergo plastic deformation and flow upward more easily.

[0065] like Figure 11 As shown, the profile of the flat wheel 223 has a slope of 2°±0.1°, and both sides have R1 transition shapes. In this way, when the flat wheel 223 is fed, the base material can be plastically deformed and flow upward more easily.

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

Claims

1. A process for producing an inner wheel of a rubber shock-absorbing wheel, characterized by: include: A. Blanking: Cut the steel plate with thickness T into several round cakes; Round cake diameter D= , where V is the volume of the inner wheel of the rubber shock-absorbing wheel; π is the pi; T = the thickness of the inner spoke of the inner wheel axle tube of the rubber shock-absorbing wheel; B. Drawing: The round cake is drawn to obtain the raw material of the shovel shaft tube. The raw material of 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 T, arc is R15±0.2mm; C. Shovel-spinning shaft tube: The shovel-spinning shaft tube material processed in the previous process is spun on the spinning machine to produce the shovel-spinning shoulder material. During spinning, the shovel-spinning shaft tube material is placed in the limiting groove C of the lower core mold C. After the spinning machine is closed, the pressure rod C presses the part tightly, and the shovel-spinning wheel C feeds in, stacking the parent material at the bulge toward the center to cause plastic deformation of the metal. After the shovel-spinning wheel C is fed into place, the shovel-spinning shaft tube process is completed, and the shovel-spinning shoulder material is obtained. The shaft tube height is T+3mm. D. Scraping shoulders: The scraping shoulder raw materials processed in the previous process are placed on the spinning machine equipment and spun into the spinning surface raw materials; during spinning, the scraping shoulder raw materials are placed in 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 scraping wheel D is fed to accumulate the parent material at the web toward the center, causing the metal to undergo plastic deformation. After the scraping wheel D is fed into place, the scraping shoulder process is completed and the spinning surface raw materials are obtained; E. Spinning surface: The spinning surface raw material processed in the previous process is placed on the spinning machine equipment and processed into the raw material for the fine model surface. Before and after spinning in this process, the thickness deformation of the material in the spinning part is 15%-20%; during spinning, the spinning surface raw material 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 sets of spinning wheels are fed in sequence, and the parts are rotated and extruded toward the upper core mold. The three sets of spinning wheels are the curling wheel, the flat spinning wheel, and the forming wheel. After the three sets 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 removal mechanisms remove the parts. At this time, the spinning surface process is completed and the fine model surface raw material is obtained; F. Finishing the surface: The raw materials of the finishing surface processed in the previous process are processed into the inner wheel of the finished rubber shock absorber wheel using a CNC lathe. The inner wheel of the finished rubber shock absorber wheel has a finishing arc concave inward, and this finishing 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 blanked into a plurality of round cakes.

3. The process for producing the inner wheel of a 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. The process for producing the inner wheel of a rubber shock-absorbing wheel according to claim 1, characterized in that: The spinning machine equipment includes a surface spinning tool; the surface spinning tool includes a lower core mold and an upper core mold connected to the spinning machine equipment for clamping the part to be processed, and three sets of rollers installed on the roller seat of the spinning machine equipment 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 the shape of R1, and the right quadrant point of the large arc deviates 2mm±0.1mm upward from the center line of the curling wheel; the flat-rotating wheel profile has a slope of 2°±0.1°, and the two sides are transitioned to the shape of R1; the forming wheel profile has a R13.2mm±0.1mm arc in the middle, and the arc and the profiles on both sides are transitioned to R5mm±0.1mm, and the profile and the two end faces are transitioned to R1.

5. The process for producing the inner wheel of a rubber shock-absorbing wheel according to claim 4, 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 returner placed between the lower pad and the lower pressure plate.

6. The process for producing the inner wheel of a rubber shock-absorbing wheel according to claim 5, characterized in that: The center positioning pin is a stepped shaft structure with a larger upper part and a smaller lower part; the outer diameter of the lower pad is larger than the outer diameter of the small step part 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 part of the center positioning pin and the lower pad to limit the position.

7. The process for producing the inner wheel of a rubber shock-absorbing wheel according to claim 4, characterized in that: An upper material ejection mechanism is provided inside the upper core mold; 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 material ejector placed between the upper pad and the upper pressure plate.

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

9. The process for producing the inner wheel of a 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 includes 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; 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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