A blanking device for friction material strips for automotive synchronizer gear rings and its blanking method

Abstract

The present invention discloses a blanking device for friction material strips used in automotive synchronizer gear rings, which sequentially includes: a feeding area, a punching area, and a material receiving area; it also includes a driving component, a controller, and a frame. The present invention also includes a method for blanking friction material strips used in synchronizer gear rings. By using the device and method of the present invention, the processing process of the laser punching die is simple, the processing procedures are short, and the precision is high after the die is formed, which fully meets the dimensional precision requirements for blanking friction material strips. The processing cycle is greatly shortened, and the die cost is greatly reduced. The advantages of the processing cycle and processing cost of the punching die are very obvious. Due to the improvement of the automatic feeding precision of punching, the punching quality is significantly improved, and the punching rejection rate is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle gear transmission, and particularly relates to a blanking device and a blanking method for the conical surface friction material of an automotive synchronizer ring. Background Art

[0002] An automotive synchronizer is a very important component inside a manual transmission (abbreviation: MT), an electronically controlled mechanical automatic transmission (abbreviation: AMT), or a dual-clutch transmission (abbreviation: DCT). The transmission includes an input shaft and an output shaft. The function of the synchronizer is to reduce the rotational speed difference between the gears of the working gear position and the target gear position during gear shifting, making the gear shifting smoother. Automotive synchronizers are divided into atmospheric pressure type and inertial type. Currently, inertial synchronizers are mainly used. The characteristic of an inertial synchronizer is to achieve synchronization by relying on the friction effect. Therefore, the friction material of the automotive synchronizer ring plays a crucial role in the synchronization process of the automotive synchronizer.

[0003] The synchronizer ring base body and the friction material are made of different materials. The friction material needs to be pasted on the conical surface of the synchronizer ring through bonding processing. Different synchronizer ring conical surface sizes are different. Therefore, the shapes and sizes of the friction material strips required for various synchronizer rings are different. The blanking size and quality of the friction material strips will directly affect the final quality of the synchronizer ring friction material. Currently, the friction materials used in domestic passenger cars mainly rely on imports and are precious materials. Therefore, the quality of the blanking process of the friction material will have a greater impact on the production cost of the product. In addition, the processing efficiency and die change efficiency of the friction material strips also have a greater impact on the material processing cost.

[0004] Currently, in China, a punch press is mainly used to carry out blanking processing of friction material strips with a metal stamping die. This processing method has a high die cost, and the die needs to be disassembled and ground every 5000 to 8000 strips processed, which affects the processing efficiency and increases the use cost. At the same time, the metal stamping die needs to be installed on the punch press, and the die change time is relatively long. It is not suitable for rapid switching of multiple varieties and has higher requirements for production arrangements. Using a punch press for processing, its processing beat is relatively long, and the production output per shift per device is about 3500 strips. And due to the influence of the accumulation of punching burrs and the in-place manual feeding, its punching scrap rate is relatively high, generally about 5%. In addition, the design and manufacturing cycle of the metal stamping die is long. The design and manufacturing cycle of the friction material blanking die during the new product development process is generally about 45 to 60 days, which affects the new product development efficiency.

[0005] With the large-scale application of friction materials in automotive transmission synchronizer rings, the demand for high-quality and low-cost friction materials is increasing. It is difficult to control the cost of imported friction materials. Therefore, issues such as how to improve the material processing efficiency, increase the qualified rate of material processing, and reduce the cost of material processing dies by optimizing the blanking process of friction materials have become increasingly urgent. In addition, as customers' requirements for the new product development cycle become increasingly stringent, how to quickly develop new adhesive friction materials with high quality has also become an important manifestation of the competitiveness of enterprises in the synchronizer industry.

[0006] Synchronizer synchronizer rings are divided into multi-cone synchronizer ring assemblies and single-cone synchronizer rings. Multi-cone synchronizer rings are generally used in the low-speed gears of synchronizers, and single-cone synchronizer rings are generally used in the high-speed gears of synchronizers. To ensure the shifting performance of the synchronizer, friction materials need to be bonded to the conical surfaces of both multi-cone synchronizer rings and single-cone synchronizer rings. For synchronizers of different gears and different models, the sizes of their synchronizer rings are often inconsistent. Therefore, friction material strips of different shapes and sizes are often required for each synchronizer ring in a synchronizer project. However, each synchronizer ring in a different gearbox is used in a matching manner. Therefore, synchronizer ring manufacturers often need to simultaneously process friction material strips of multiple model specifications, which requires the synchronous configuration of multiple friction material strip punching devices or frequent switching of processed product models. This not only brings inconvenience to production organization but also results in high processing costs.

[0007] Currently, synchronizer ring manufacturers mainly use ordinary punching presses with hardware punching dies to process friction material strips. The long manufacturing cycle of the dies, the easy wear and damage of the dies, the high cost of die use, the long die changeover time, the relatively low punching efficiency of the punching press, and the relatively high punching scrap rate also restrict the control of production costs. Summary of the Invention

[0008] In order to overcome the defects in the existing blanking technology of friction material strips, the purpose of the present invention is to provide a synchronizer ring friction material strip blanking device and tool, which can reduce the use cost of blanking dies for friction material strips, improve the production efficiency of material blanking, achieve rapid changeover, increase the qualified rate of blanking processed products, and shorten the development cycle of new product blanking dies.

[0009] The friction material strip blanking device for automotive synchronizer rings provided by the present invention successively includes: a feeding area, a punching area, and a receiving area; it also includes several driving components, a controller, and a frame;

[0010] The feeding area is arranged at the front part of the frame. The feeding area includes a feeding plate, limit adjusting devices on both sides of the feeding plate, and a feeding rubber roller composed of two upper and lower rubber rollers in contact with each other is correspondingly arranged at the end of the feeding plate;

[0011] The middle part of the frame is provided with a punching area, and the punching area includes a punching component arranged on the upper part of the frame, and a lower die pad fixedly connected to the lower part of the frame, a lower die gasket is arranged at the bottom of the cavity on the upper end surface of the lower die pad, one end of the spring pressure plate is fixedly connected to the lower die pad, and the other end is pressed on the lower die gasket; the punching component includes an upper die pad, and a punching die embedded in the lower end surface of the upper die pad; the upper die pad is fixedly connected to the upper template slidably connected to the frame, and the upper template is connected to the first driving component; the punching die is composed of a laser die blade, a discharge elastic cotton, and a laser die bottom plate, and the outer periphery of the die blade is embedded with elastic cotton, which is embedded in the inner cavity and outer periphery of the laser die bottom plate blade, and the elastic cotton is 1-2 mm higher than the top of the die blade;

[0012] The material receiving area is arranged at the rear of the frame, and the material receiving area includes a material receiving plate, and a material receiving rubber roller composed of two upper and lower rubber rollers is arranged at the front end of the material receiving plate;

[0013] The working surfaces of the feeding area, the lower die pad, and the material receiving area are located on the same working surface; the feeding rubber roller and the material receiving rubber roller are linked through a second driving component; the first and second driving components are electrically connected to a controller.

[0014] The friction material strip blanking device for automobile synchronizer gear ring of the present invention is used for punching and blanking the friction material strip of synchronizer cone surface. The present invention realizes the online synchronous operation of the punching and blanking equipment through the controller and the driving component, and the feeding rubber roller and the punching and blanking action are synchronously operated to realize automatic punching and blanking. The receiving rubber roller, the feeding rubber roller and the punching and blanking action are synchronously operated to realize automatic punching and blanking. The punching and blanking action of the equipment is coordinated to automatically feed the material to realize automatic punching and blanking of the friction material strip.

[0015] Select the specified type of punching die, place it in the upper die plate positioning and clamping device and clamp it. It is used to directly punch the friction material to produce a formed friction material strip. The upper die pad supports the punching die that fits it. The spring pressure plate is used for the clamping device after the lower die pad is installed in the lower die pad to prevent the gasket from shifting during the punching process. Take out the carbon plate to be punched, place it on the feed plate, adjust the feed plate limit device, fix the limit block after the carbon plate is in the center of the feed plate, and make the carbon plate contact the feed rubber roller. The transmission belt is linked to ensure that the feed and the discharge rubber roller run synchronously to ensure the accuracy of punching and feeding. Start the punching equipment and enter the punching parameters on the equipment control panel, such as punching depth, punching drag length, and punching speed. Select the manual punching mode, and after the first piece is punched, test and confirm the friction material strip that has been punched. After the first piece is confirmed to be qualified, select the automatic punching mode to punch the carbon plate continuously. When the required punching of the carbon plate is completed, the sensing device under the feeding plate no longer senses the material, and the sensing device under the receiving plate no longer senses the existence of the material. The controller program determines that the punching work is completed, and the equipment automatically stops the punching action to complete the punching work of the entire friction material strip.

[0016] The above-mentioned blanking device for friction material strips of automotive synchronizer rings can achieve rapid die change of punched products by using a standardized laser die bottom plate and cooperating with a punching die pressing device and a positioning device. It shortens the die change time of conventional press hardware punching dies from 30 - 60 minutes to within 3 minutes, greatly shortening the product die change time and improving production efficiency. The laser die bottom plate is preferably made of high-quality multi-layer core board, and through laser cutting processing, it can accurately and quickly process the die size specified for the friction material strip. The laser cutting has high dimensional accuracy and fully meets the blanking accuracy requirements of the friction material strip. The elastic cotton is 1 - 2 mm higher than the top of the die blade. After punching, the elastic cotton resets, thus realizing the unloading during the punching process.

[0017] For further improvement, a guide rail and a locking component that can move to one side are arranged under the lower die backing plate. When the gasket is deformed due to continuous long-term punching, the locking component is opened, and the backing plate can be easily removed from the punching area, and a new punching gasket can be quickly replaced; the punching gasket can use a metal gasket with a standard thickness.

[0018] For further improvement, the center of the feeding plate is grooved, and an optical sensing element is arranged below the groove. The optical sensing element is slidably arranged on a support rod fixedly connected to the machine frame; the center of the receiving plate is grooved, and an optical sensing element is arranged below the groove. The optical sensing element is slidably arranged on a support rod fixedly connected to the machine frame; the optical sensing element is electrically connected to the controller. The optical sensing element can move horizontally within the support rod to adjust the sensing position to adapt to carbon plates of different sizes to be punched.

[0019] When the above-mentioned optical sensing element does not detect the plate to be punched and the friction material strip that has been punched, it means that there is no new material to be punched entering the equipment, and the controller stops punching according to these two signals. Through the application of the punching and feeding induction device, the equipment is prevented from idling, achieving energy conservation of the equipment while preventing the equipment from idling and accidental damage.

[0020] For further improvement, the punching die is fixed in the lower end face of the upper die backing plate through a die pressing device arranged on the two long sides of the upper die backing plate and a positioning device arranged at the middle positions of the two short ends. The lifting handle passes through the upper die plate and is connected to the die pressing device.

[0021] The pressing device has a guiding effect when pressing the punching die, and the positioning device can conveniently achieve rapid and accurate positioning of the punching die. The lifting handle facilitates the operator to quickly and conveniently lift and press the punching die.

[0022] For further improvement, scales are marked on both sides of the central axes of the feeding plate and the limiting plate. The central axis of the feeding plate is also the central axis of the punching area. The limiting blocks on both sides of the feeding plate can easily adjust the distance according to the width of the carbon plate to be punched, referring to the scales on the feeding plate, ensuring that the carbon plate to be punched is always located in the center of the punching area. Ensure that the central axes of the two limiting blocks always coincide with the central axis of the punching die after adjustment, preventing the carbon plate from shifting during punching and causing material waste.

[0023] Another object of the present invention is to provide a method for blanking the conical surface friction material of a synchronizer ring.

[0024] Based on the above-mentioned blanking device for friction material strips for automotive synchronizer rings, the present invention provides a method for blanking friction material strips for synchronizer rings. This blanking method can be applied to blanking friction material strips for various types of synchronizer ring friction materials or blanking friction materials on various automotive friction plates. The blanking method is as follows:

[0025] Step 1: Design a suitable friction material strip for the synchronizer ring according to the size of the conical surface friction material of the synchronizer ring.

[0026] Step 2: Design the size of the punching die suitable for the size of the friction material strip, process the shape of the laser die cutting blade according to the die size, and use the welding method to connect the blade interfaces into a whole.

[0027] Step 3: Use the laser cutting method to process a die mounting cavity on the laser die cutting bottom plate according to the die size; use the laser cutting method to process the unloading elastic cotton.

[0028] Step 4: Install the laser die cutting blade into the cavity of the die bottom plate, and then firmly paste the unloading elastic cotton around the blade to complete the processing of the entire punching die.

[0029] Step 5: The punching die is fixed on the lower end face of the upper die backing plate through the die pressing components arranged on the two long sides of the upper die backing plate and the positioning components arranged at the middle positions of the two short ends.

[0030] Step 6: Take out the sheet-shaped friction material to be punched and place it on the feeding plate. Make the material opposite to the center of the punching area through the limit adjusting device and contact with the feeding rubber roller; adjust the position of the photoelectric induction element below the feeding plate according to the placement position of the friction material to ensure that it can just sense the front end of the friction material feeding; at the same time, adjust the position of the photoelectric induction element below the receiving plate to ensure that it can just sense the end of the punched friction material.

[0031] Step 7: Start the punching equipment, set the punching speed, punching drag length, and punching depth in the controller panel, select the automatic punching mode, and start the operation of the equipment, so as to realize the automatic blanking of the friction material strip for the synchronizer ring.

[0032] For the installation of the laser die mold in the above step 5, since the entire punching device is provided with a die mold limit and positioning device, and the bottom plate of the punching die mold is designed according to a unified standard, the installation and die change of the die mold will be very convenient, with high installation accuracy, simple die change operation and low labor intensity. A single operator can complete the die change within 3 minutes. A single device can adapt to rapid die change for multiple varieties and small batches, and the die change has almost no impact on production efficiency.

[0033] In the above step 7, all punching-related processing parameters will be directly set on the control panel, greatly reducing the debugging difficulty of punching operations and improving the accuracy of debugging operations at the same time. Through the application of the automatic punching mode, the punching efficiency can be greatly improved, and the labor intensity of operators can be greatly reduced at the same time.

[0034] Adopting the device and method of the present invention, compared with the prior art, has the following advantages and beneficial effects:

[0035] The processing process of the punching die mold is simple, the processing procedures are short, and the accuracy of the die mold after forming is high, fully meeting the dimensional accuracy requirements of the friction material strip blanking. Compared with the traditional hardware punching die, its processing cycle is greatly shortened. The processing cycle of the traditional hardware punching die is usually about 60 days, and the processing cycle of this punching die mold can be controlled within 1 day. In addition, compared with the traditional hardware punching die, its mold cost is greatly reduced. The processing cost of the traditional hardware punching die is usually more than 5000 yuan, and the processing cost of this punching die mold can usually be controlled within 500 yuan. The advantages of the processing cycle and processing cost of the punching die mold are very obvious. Through the application of the above-mentioned friction material strip blanking device for automotive synchronizer rings, the development cycle of the friction material strip blanking punching die can be greatly shortened, the use cost of the die can be greatly reduced, and the development cycle of the friction material strip used for new products can also be greatly shortened, promoting the shortening of the development cycle of the entire bonded friction material synchronizer ring. Due to the improvement of the automatic feeding accuracy of punching, the punching quality is significantly improved, and the punching scrap rate is greatly reduced. For the punching processing of the existing hardware punching die, its processing beat is relatively long, and the production per shift per device is about 3500 strips; after using the automatic punching blanking device, the production per shift per automatic punching device can reach more than 31000 strips. For the punching processing of the existing hardware punching die, due to the influence of the accumulation of punching burrs and the incomplete manual feeding, its punching scrap rate is relatively high, generally about 5%; after using the automatic punching blanking device, the punching scrap rate can be controlled within 0.1%. Description of the Drawings

[0036] Figure 1 is a schematic diagram of the shape of the laser die mold used in the embodiment of the present invention.

[0037] Figure 2 is Figure 1 a top view schematic diagram of

[0038] Figure 3 It is an assembly schematic diagram of the blanking device for the friction material strip used in the embodiments of the present invention.

[0039] Figure 4 is Figure 3 The top view schematic diagram of the feeding plate. Specific embodiments

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention will be further described in detail below in combination with the embodiments, but the embodiments of the present invention are not limited thereto.

[0044] Embodiment 1:

[0045] As Figures 1-4As shown in the figure, a blanking device for friction material strips used in automotive synchronizer rings sequentially includes: a feeding area, a punching area, and a receiving area; it also includes several driving components, a controller 27, and a frame; a front support frame 1 of the frame is provided with the feeding area, and the feeding area includes a feeding plate 3, limit blocks 5 on both sides of the feeding plate. The lower part of the limit block is fixedly connected with an adjusting block 6, and the adjusting block is fixedly connected to the frame through a limit block adjusting screw 7. A feeding rubber roller composed of two upper and lower rubber rollers (8, 10) is correspondingly arranged at the end of the feeding plate; the punching area is arranged in the middle of the frame. The punching area includes a punching component arranged on the upper part of the frame and a lower die backing plate 11 fixedly connected to a lower limit guiding block 9 at the lower part of the frame. A guide rail and a locking component 20 that can move to one side are arranged below the lower die backing plate. A lower die gasket 14 is arranged at the bottom of the cavity on the upper end surface of the lower die backing plate. A spring pressing piece 12 is fixedly connected to the lower die backing plate through an adjusting screw 13, and the other end of the spring pressing piece presses against the lower die gasket; the punching component includes an upper die backing plate 17, and the upper die backing plate is fixedly connected to an upper template that is slidably connected to the frame and can quickly reciprocate up and down under the drive of the first driving component. The upper template is connected to the first driving component; a punching die 16 is embedded in the lower end surface of the upper die backing plate through die pressing blocks 15 and positioning pins 18 arranged around the upper die backing plate. A lifting handle 19 passes through the upper template and is connected to a die pressing device; the punching die is composed of a laser die blade 30, a discharging elastic cotton 29, and a laser die bottom plate 28. The outer periphery of the die blade is embedded in the elastic cotton, and the elastic cotton is embedded in the inner cavity and outer periphery of the blade cavity of the laser die bottom plate, and the elastic cotton is 1 - 2 mm higher than the top of the die blade, that is, the height H1 of the elastic cotton + the height H2 of the die bottom plate - the height H3 of the blade = 1 - 2 cm; the receiving area is arranged on the support frame 24 at the rear of the frame, and the receiving area includes a receiving plate 23. A receiving rubber roller composed of two upper and lower rubber rollers (21, 22) is correspondingly arranged at the front end of the receiving plate;

[0046] The working surfaces of the above-mentioned feeding area, lower die backing plate, and receiving area are located on the same working surface; the feeding rubber roller and the receiving rubber roller are linked through a second driving component.

[0047] A groove is opened in the center of the feeding plate, and an optical sensing element 4 is arranged below the groove. The optical sensing element is slidably arranged on a support rod 2 fixedly connected to the frame; a groove is opened in the center of the receiving plate, and an optical sensing element 26 is arranged below the groove. The optical sensing element is slidably arranged on a support rod 25 fixedly connected to the frame.

[0048] The first and second driving components and the optical sensing element are electrically connected to the controller.

[0049] The present invention also includes a blanking method for friction material strips used in synchronizer rings. This blanking method can be applied to blanking friction material strips for various synchronizer ring friction materials or blanking friction materials on various automotive friction plates; the blanking method is as follows:

[0050] Step 1: Design a synchronizer ring friction material strip adapted to the size of the synchronizer ring conical surface friction material;

[0051] Step 2: Design the size of a punching die adapted to the size of the friction material strip. According to the die size, machine the shape of the laser die cutting edge. The cutting edge interfaces are connected into a whole by welding;

[0052] Step 3: Machine a die mounting cavity on the laser die cutting bottom plate by laser cutting according to the die size; Machine the unloading elastic cotton by laser cutting;

[0053] Step 4: Install the laser die cutting edge into the die bottom plate cavity, and then firmly paste the unloading elastic cotton around the cutting edge to complete the machining of the whole punching die;

[0054] Step 5: The punching die is fixed in the lower end face of the upper die backing plate through the die pressing components arranged on the two long sides of the upper die backing plate and the positioning components arranged at the middle positions of the two short ends;

[0055] Step 6: Take out the sheet-shaped friction material to be punched and place it on the feeding plate. Through the limit adjusting device, make the material opposite to the center of the punching area and contact the feeding rubber roller; Adjust the position of the photoelectric induction element below the feeding plate according to the placement position of the friction material to ensure that it can just sense the front end of the friction material feeding; At the same time, adjust the position of the photoelectric induction element below the receiving plate to ensure that it can just sense the end of the punched friction material;

[0056] Step 7: Start the punching equipment. Set the punching speed, punching drag length, and punching depth in the control panel, select the automatic punching mode, start the equipment operation. When the controller senses that there is material in the feeding area, it drives the second driving component respectively to drive the feeding rubber roller and the receiving rubber roller to rotate, send the material into the punching area, the controller drives the first driving component to drive the upper template to press down to complete the punching, and the punched friction material strip is sent into the receiving area, thus realizing the automatic blanking of the friction material strip for the synchronizer ring;

[0057] Example 2:

[0058] This embodiment is further optimized on the basis of Embodiment 1: The cutting edge of the laser die of the present invention uses a sharp and wear-resistant metal cutting edge. The cutting edge is processed into the shape and size required for the product by a numerical control bending device. After the cutting edge is bent, the interfaces are welded together, and the overall dimensional accuracy of the cutting edge is relatively high. After the cutting edge is processed, it is directly installed into the cavity formed by laser cutting on the die bottom plate, and the cutting edge of the die is integrated with the die bottom plate. The unloading elastic cotton of the laser die uses 5mm high-performance elastic gold glue, which can be formed by laser cutting. After the formed gold glue is adhered to the die bottom plate around the cutting edge of the die and inside the cutting edge cavity using a high-performance glue, the gold glue is 1-2mm higher than the top of the cutting edge of the die in its natural state, thereby realizing the unloading during the punching process.

[0059] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be elaborated here.

[0060] Using the device and method of the present invention, the processing process of the laser punching die is simple, the processing procedure is short, and the accuracy of the die after forming is high, fully meeting the dimensional accuracy requirements for blanking the friction material strip. Its processing cycle is greatly shortened, and the die cost is greatly reduced. The advantages of the processing cycle and processing cost of the punching die are very obvious. Due to the improvement of the automatic feeding accuracy during punching, the punching quality is significantly improved, and the punching scrap rate is greatly reduced. It realizes the efficient blanking of the friction material for the synchronizer gear ring, and meets the requirements of cost reduction and processing quality improvement.

[0061] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A blanking method for the conical friction material of a synchronizer ring, characterized in that, It includes the following steps: Step 1: Design a synchronizer ring friction material strip adapted to the size of the synchronizer ring conical surface friction material; Step 2: Design the size of a punching die adapted to the size of the friction material strip. According to the die size, machine the shape of the laser die cutting blade. The blade interfaces are connected as a whole by welding; Step 3: Machine a die mounting cavity on the laser die cutting bottom plate according to the die size by laser cutting; Machine the unloading elastic cotton by laser cutting; Step 4: Install the laser die cutting blade into the die bottom plate cavity, and then firmly paste the unloading elastic cotton around the blade to complete the machining of the entire punching die; Step 5: The punching die is fixed in the lower end face of the upper die backing plate through the die clamping device arranged on the two long sides of the upper die backing plate and the positioning components arranged at the middle positions of the two short ends; Step 6: Take out the sheet-shaped friction material to be punched and place it on the feeding plate. Make the material opposite to the center of the punching area through the limit adjustment device and contact with the feeding rubber roller; Adjust the position of the photoelectric induction element below the feeding plate according to the placement position of the friction material to ensure that it can just sense the front end of the friction material feeding; At the same time, adjust the position of the photoelectric induction element below the receiving plate to ensure that it can just sense the end of the punched friction material; Step 7: Start the punching equipment. Set the punching speed, punching drag length, and punching depth on the controller panel, select the automatic punching mode, and start the equipment operation to realize the automatic blanking of the friction material strip for the synchronizer ring.

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