A spinning fixture and spinning method for a boss-type belt pulley with evenly distributed bosses

Abstract

This invention relates to the field of machining, and more particularly to a spinning fixture for a boss-type pulley with evenly distributed bosses. The fixture includes an upper die mechanism, a lower die mechanism, a spinning wheel mechanism, and a material ejection mechanism, used for manufacturing boss-type pulleys with evenly distributed bosses. The boss-type pulley is circular, with a boss at its center and upper and lower edges of uniform height along its circumference. The upper die mechanism is fixed to the upper base of the spinning machine. The lower die mechanism is fixed to the lower base of the spinning machine. The spinning wheel mechanism is connected to a radial cylinder of the equipment and, during operation, moves horizontally close to the upper and lower die mechanisms. The material ejection mechanism is located within the upper die mechanism. At the contact point between the upper and lower die mechanisms, the upper and lower die mechanisms are the same size. This invention also includes a spinning processing method. It overcomes the disadvantages of low machining efficiency, using a spinning-based material stacking process, resulting in very little waste, short processing time, and higher strength and better surface roughness compared to machined workpieces.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to a spinning fixture and spinning method for a belt pulley with an evenly distributed boss. Background Technology

[0002] With the continuous advancement of the automotive industry, the processing technology for each product is constantly being innovated and improved. In the field of mechanical manufacturing, the machining of evenly distributed boss pulleys is mostly completed by turning. Turning processes generate a lot of waste, have long processing times, and are inefficient.

[0003] like Figure 7 As shown, the boss-split pulley 500 is circular, with a protrusion 501 formed at the center of the circle. An upper edge 502 and a lower edge 503 protrude from the circumference of the circle. The upper edge 502 and the lower edge 503 are at the same height, constituting the boss-split pulley 500. Summary of the Invention

[0004] The purpose of this invention is to provide a spinning fixture and spinning method for a pulley with an evenly distributed boss, which mainly solves the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is to provide a boss-split pulley spinning fixture for use with a spinning machine. The fixture is characterized by including an upper die mechanism, a lower die mechanism, a spinning wheel mechanism, and a material ejection mechanism, for manufacturing boss-split pulleys from raw materials.

[0006] The evenly distributed pulley with a boss is circular; a boss is formed at the center of the circle, protruding on the circumference of the circle, and forming an upper edge and a lower edge; the upper edge and the lower edge are at the same height;

[0007] The upper die mechanism is fixed to the upper base of the spinning machine and, during operation, is pressed down by the upper base to fit against the lower die mechanism; the lower die mechanism is fixed to the lower base of the spinning machine and rotates at high speed under the drive of the lower spindle during operation; the spinning wheel mechanism is connected to the radial cylinder of the equipment and, during operation, according to the shape of the evenly distributed pulley, moves horizontally close to the upper die mechanism and the lower die mechanism; the unloading mechanism is located inside the upper die mechanism;

[0008] At the contact position of the upper mold mechanism and the lower mold mechanism, the upper mold mechanism and the lower mold mechanism are the same size, so that after the blank material is pressed between the upper mold mechanism and the lower mold mechanism, the part that extends out of the contact surface of the upper mold mechanism and the lower mold mechanism can extend upward and downward simultaneously under the action of the rotating wheel mechanism.

[0009] Furthermore, the upper mold mechanism includes an upper conversion seat, an upper mold, and an upper positioning block;

[0010] The upper conversion seat is positioned and combined with the upper base using a stop; a stop is also provided between the upper mold and the upper conversion seat, and they are fixed with bolts; the bottom shape of the upper mold corresponds to the shape of the top surface of the evenly distributed pulley of the boss; the upper positioning block is located below the upper mold; a positioning spring is provided between the upper positioning block and the upper mold; the upper positioning block protrudes slightly from the bottom surface of the upper mold.

[0011] Furthermore, the lower mold mechanism includes a lower conversion seat, a lower mold, and a lower positioning block;

[0012] The lower conversion seat is positioned and combined with the lower base using a stop; a stop is also provided between the lower mold and the lower conversion seat, and they are fixed with bolts; the top shape of the lower mold corresponds to the shape of the bottom surface of the evenly distributed pulley of the boss; the lower positioning block is located above the lower mold.

[0013] Furthermore, the ejection mechanism includes an ejection block, an ejection spring, and a stop block;

[0014] An opening is provided at the bottom of the upper mold mechanism, and the stop block, the ejection spring and the ejection block are sequentially embedded in the opening; the stop block is located on the inward side of the opening, the ejection block is located on the outward side of the opening, and the ejection spring is located between the stop block and the ejection block, and is in contact with the stop block and the ejection block.

[0015] Furthermore, the rotating mechanism includes a rotating wheel and a rotating wheel fixing seat;

[0016] The rotating wheel fixing seat is fixed on the radial cylinder of the equipment and moves horizontally under the drive of the radial cylinder; the radial cylinder of the equipment is driven to move horizontally by the spinning machine; the rotating wheel is mounted on the rotating wheel fixing seat and passively rotates around the rotating wheel fixing seat.

[0017] Furthermore, there are multiple rotating wheels, made of high-carbon mold steel; the multiple rotating wheels have different shapes, which match the shape of the boss-divided pulley, and during the processing, they are sequentially pressed and adhered to the blank raw material to finally form the boss-divided pulley.

[0018] Furthermore, a bearing is provided on the rotating wheel fixing seat, and the outer diameter of the bearing matches the inner diameter of the rotating wheel's inner hole.

[0019] The present invention also provides a spinning method using the above-mentioned boss-split pulley spinning fixture, comprising the following steps:

[0020] Step S100: Install the blank material on the lower mold mechanism and use the lower positioning block to complete the rough positioning of the blank material;

[0021] In step S200, the spinning machine drives the upper die mechanism to press down until the upper positioning block located at the bottom of the upper die mechanism is in contact with the upper surface of the blank material and presses and fixes the blank material.

[0022] Step S300: The spinning machine uses the spinning wheel mechanism to spin the blank raw material;

[0023] In step S400, the spinning machine drives the upper die mechanism to move upward, and the upper die mechanism separates from the lower die mechanism;

[0024] In step S500, the unloading mechanism operates to separate the processed boss-split pulley from the upper mold mechanism; the boss-split pulley is then removed.

[0025] Further, step S200 includes the following steps:

[0026] Step S201: The upper positioning block is attached to the upper surface of the blank material to complete the fine positioning of the blank material;

[0027] In step S202, the upper mold mechanism continues to descend, and the positioning spring is compressed until the upper mold is completely in contact with the upper surface of the blank material, pressing the blank material tightly.

[0028] Further, step S300 includes the step of...

[0029] In step S301, the spinning machine drives the upper die mechanism, which in turn drives the lower die mechanism and the fixed blank material to rotate together.

[0030] In step S302, the spinning wheel mechanism moves horizontally under the drive of the spinning machine, while the radial cylinder of the equipment actuates to drive the spinning wheel mechanism to move laterally.

[0031] In step S303, when the rotating wheel mechanism contacts and compresses the blank material, the rotating wheel mounted on the rotating wheel fixing seat is obstructed by the blank material and rotates around the rotating wheel fixing seat.

[0032] In view of the above technical features, the present invention provides a spin forming fixture and manufacturing method for a boss-type belt pulley, which can overcome the disadvantages of low machining efficiency. It uses a spin forming and stacking process, which generates very little waste, has a short processing time, and produces spin forming products with higher strength and better surface roughness compared to machined workpieces. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the assembly of a preferred embodiment of the boss-split pulley spinning fixture of the present invention;

[0034] Figure 2 This is a schematic diagram of the spinning upper die mechanism and the unloading mechanism in a preferred embodiment of the boss-divided belt pulley spinning fixture of the present invention;

[0035] Figure 3 This is a schematic diagram of the spinning die mechanism in a preferred embodiment of the boss-split belt pulley spinning fixture of the present invention;

[0036] Figure 4 This is a schematic diagram of the rotating mechanism in a preferred embodiment of the boss-divided belt pulley spinning fixture of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the first rotating wheel in a preferred embodiment of the boss-divided belt pulley spinning fixture of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of the second rotating wheel in the rotating wheel mechanism of a preferred embodiment of the boss-divided belt pulley spinning fixture of the present invention;

[0039] Figure 7 This is a schematic diagram of a pulley product with an evenly distributed boss.

[0040] Figure 8 This is a flowchart of a preferred embodiment of the manufacturing method of the present invention using a boss-divided belt pulley spinning fixture.

[0041] 100 - Upper die mechanism, 200 - Lower die mechanism, 300 - Rotating wheel mechanism, 400 - Material ejection mechanism, 500 - Boss-split pulley;

[0042] 101-Upper conversion seat, 102-Upper mold, 103-Upper positioning block, 104-Positioning spring;

[0043] 201-Lower conversion seat, 202-Lower mold, 203-Lower positioning block;

[0044] 301-Rotating wheel, 302-Rotating wheel fixing seat; 3011-First rotating wheel, 3012-Second rotating wheel;

[0045] 401 - Unloading block, 402 - Unloading spring, 403 - Stop block;

[0046] 501 - Boss, 502 - Upper edge, 503 - Lower edge. Detailed Implementation

[0047] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0048] Please see Figures 1 to 7 This invention discloses a spinning fixture for manufacturing a boss-type evenly divided pulley 500 from raw material. The boss-type evenly divided pulley 500 is circular, with a boss 501 formed at the center of the circle. An upper edge 502 and a lower edge 503 protrude from the circumference of the circle. The upper edge 502 and the lower edge 503 are at the same height, constituting the boss-type evenly divided pulley 500.

[0049] The present invention discloses a preferred embodiment of a boss-divided belt pulley spinning fixture, which includes an upper die mechanism 100, a lower die mechanism 200, a spinning wheel mechanism 300, and a material ejection mechanism 400.

[0050] The upper die mechanism 100 is fixed to the upper base of the spinning machine, while the lower die mechanism 200 is fixed to the lower base of the spinning machine. The spinning wheel mechanism 300 is connected to the radial cylinder of the spinning machine. The unloading mechanism 400 is installed inside the upper die mechanism 100.

[0051] During operation, the lower base of the spinning machine remains stationary, while the upper base presses down, causing the upper die mechanism 100 to move downwards until it comes into contact with the lower die mechanism 200, thus fixing the raw material between them. At the contact point between the upper die mechanism 100 and the lower die mechanism 200, the dimensions of the upper die mechanism 100 and the lower die mechanism 200 are the same, so that after the raw material is compressed, the portion extending beyond the contact surface of the upper die mechanism 100 and the lower die mechanism 200 extends upwards and downwards simultaneously under the action of the spinning wheel mechanism 300. Then, the spinning machine drives the lower die mechanism 200, causing the raw material and the upper die mechanism 100 to rotate at high speed together, while simultaneously driving the spinning wheel mechanism 300 to approach the upper die mechanism 100 and the lower die mechanism 200 from the horizontal direction, compressing the raw material and forming the upper edge 502 and lower edge 503 of the boss-shaped pulley 500 with consistent height, completing the processing of the boss-shaped pulley 500.

[0052] The upper mold mechanism 100 includes an upper conversion seat 101, an upper mold 102, and an upper positioning block 103.

[0053] The upper conversion base 101 is connected to the upper base of the spinning machine. A stop is provided between the upper conversion base 101 and the upper base to ensure the position of the upper conversion block 101. The upper die 102 is located below the upper conversion base 101 and is fixed to the upper conversion base 101 by bolts. A stop is also provided between the upper die 102 and the upper conversion base 101. The bottom of the upper die 102 is used to clamp the blank material and form the shape of the top of the boss-divided pulley 500, so its bottom surface shape corresponds to the shape of the upper edge 502 of the boss-divided pulley 500. The upper positioning block 103 is located below the upper die 102. A positioning spring 104 is provided between the upper positioning block 103 and the upper die 102. Under the action of the positioning spring 104, the upper positioning block 103 protrudes slightly from the bottom surface of the upper mold 102, thereby ensuring that during the pressing process, the upper positioning block 103 contacts the blank material first and completes precise positioning before the upper mold 102 contacts the blank material to complete the pressing.

[0054] The lower mold mechanism 200 includes a lower conversion seat 201, a lower mold 202, and a lower positioning block 203.

[0055] The lower conversion seat 201 is connected to the lower base of the spinning machine. A stop is provided between the lower conversion seat 201 and the lower base to ensure the position of the lower conversion seat 201. The lower die 202 is located above the lower conversion seat 201 and is fixed to the lower conversion seat 201 by bolts. A stop is also provided between the lower die 202 and the lower conversion seat 201. The lower die 202 supports the product during the spinning process and determines the internal shape of the boss-split pulley 500; therefore, the shape of its top surface corresponds to the shape of the bottom surface of the boss-split pulley 500. The lower positioning block 203 is located above the lower die 202 and is embedded in the lower die 202, serving as a coarse positioning element.

[0056] The spinning mechanism 300 includes a spinning wheel 301 and a spinning wheel fixing seat 302. The spinning wheel fixing seat 302 is fixed to a radial cylinder of the equipment that provides lateral force. The radial cylinder drives the spinning wheel fixing seat 302 to move horizontally, thereby realizing the horizontal movement of the spinning wheel. A bearing is provided on the spinning wheel fixing seat 302, and the outer diameter of the bearing matches the inner diameter of the inner hole of the spinning wheel 301. There are two spinning wheels 301, which are of different shapes and come into contact with the raw material in sequence, forming different parts of the progressively formed boss-shaping pulley 500. They are both made of high-carbon mold steel, which ensures both the hardness and toughness of the spinning wheel and improves its service life. Both spinning wheels 301 are mounted on the bearings of the spinning wheel fixing seat 302. During the spinning process, when the spinning wheel 301 comes into contact with the raw material, the spinning wheel 301 is passively rotated around the spinning wheel fixing seat 302 under the pressure of the raw material. The rotating wheel 301 and the raw material form rolling friction, which makes the wheel 301 subjected to uniform force during operation.

[0057] The ejection mechanism 400 includes an ejection block 401, an ejection spring 402, and a stop block 403. The ejection block 401, ejection spring 402, and stop block 403 are all disposed inside the upper positioning block 102. Specifically, an opening is provided at the bottom of the upper positioning block 102, and the stop block 403, ejection spring 402, and ejection block 401 are sequentially embedded in this opening. The ejection block 401 is located on the outward side of the opening, while the stop block 403 is located on the inward side of the opening. The stop block 403 abuts against the bottom of the opening in the upper positioning block 103. One end of the ejection spring 402 abuts against the stop block 403, and the other end abuts against the ejection block 401, thereby pushing the ejection block 401 outward from the opening. When the product is finished and the upper mold 102 is raised, if the product is stuck on the upper positioning block 103, the ejector mechanism 400 can effectively remove the product from the upper positioning block 103, preventing the risk of the product falling off after being lifted by the upper mold mechanism 100. Due to the compressibility of the ejector spring 402, when the upper mold 102 is pressed down for spinning, the ejector block 401 will be compressed and retract into the opening of the upper positioning block 103 when it encounters the blank material, without affecting the spinning process. After the spinning process is completed, when the upper mold 102 is raised, the ejector spring 402 pushes out the ejector block 401, and the ejector block 401 pushes the workpiece onto the lower mold 202, separating it from the upper mold 102.

[0058] The working principle of this embodiment is briefly described as follows: The lower mold mechanism 200 is fixed on the lower base of the equipment, and the main shaft in the lower base provides the rotational power during spinning. The lower mold mechanism 200 supports and roughly positions the product. After the product is placed in the lower mold mechanism 200 and in position, the upper mold mechanism 100, fixed on the upper base of the equipment, presses down on the upper surface of the product through the upper hydraulic cylinder, ensuring that the product does not slide relative to the surface during spinning. At the same time, the upper mold mechanism 100 has an upper positioning block 103 for precise positioning of the product and a material ejection mechanism 400. At this time, the precise positioning and pressing of the product are completed. Then the main shaft rotates, driving the product to rotate at high speed. At this time, the spinning wheel mechanism 300, fixed on the radial cylinder of the equipment, is driven by the radial cylinder. Two spinning wheels 301 of different shapes (the first spinning wheel 3011 and the second spinning wheel 3012) spin the product in sequence, so that the raw material is slowly deformed under the action of the spinning wheels 301, thereby achieving the ideal product shape. During operation, the first spinning wheel 3011 and the second spinning wheel 3012 contact the raw material in sequence.

[0059] Please see Figure 8 This invention discloses a spinning method using the above-mentioned boss-divided pulley spinning fixture. A preferred embodiment of this method includes the following steps:

[0060] Step S1: Place the raw material blank.

[0061] The raw material blank is installed on the lower mold mechanism, and the lower positioning block is used to complete the rough positioning of the raw material blank. When the raw material blank is placed manually, the lower positioning block is used to determine the initial position of the raw material blank and complete the rough positioning.

[0062] Step S2: The upper mold mechanism moves down to press and fix the raw material.

[0063] During this process, the upper positioning block first comes into contact with the upper surface of the blank material to complete precise positioning. Then, the upper mold mechanism continues to descend, the positioning spring is compressed, and while the upper positioning block keeps pressing the blank material, the upper mold continues to descend and comes into complete contact with the upper surface of the blank material, fixing the blank material in place.

[0064] Step S3: The spinning machine uses a spinning wheel mechanism to spin the raw material blank.

[0065] In this process, the spinning machine first drives the lower die mechanism, which in turn drives the upper die mechanism and the fixed raw material to rotate at high speed. Then, the spinning machine drives the radial cylinder of the equipment to move horizontally, thereby driving the spinning wheel mechanism to move horizontally. At the same time, the radial cylinder of the equipment actuates, driving the spinning wheel mechanism to move laterally. When the spinning wheel mechanism contacts and extrudes the raw material, the spinning wheel, which is mounted on the spinning wheel fixing seat, is obstructed by the raw material and rotates around the spinning wheel fixing seat.

[0066] Specifically, the first spinning wheel spins the raw material to uniformly thicken the outer edge to a certain size. Then the first spinning wheel retracts, and the second spinning wheel spins and shapes the product to achieve the desired product shape.

[0067] Step S4: The upper mold mechanism moves upward.

[0068] The spinning machine drives the upper die mechanism to move upward, separating the upper die mechanism from the lower die mechanism.

[0069] Step S5: Return the material and remove the product.

[0070] When the upper die mechanism disengages from the finished boss-split pulley, the ejector mechanism activates, and the ejector spring pushes out the ejector block, separating the boss-split pulley from the lower part of the upper die mechanism. The boss-split pulley remains on the lower die mechanism and is manually removed for subsequent processing, such as machining to remove burrs and flash.

[0071] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A boss-split type belt pulley spinning fixture, used in conjunction with a spinning machine, characterized in that, It includes an upper die mechanism, a lower die mechanism, a rotating wheel mechanism, and a material ejection mechanism, and is used to manufacture a boss-split pulley from raw material blanks; The evenly distributed pulley with a boss is circular; a boss is formed at the center of the circle, protruding on the circumference of the circle, and forming an upper edge and a lower edge; the upper edge and the lower edge are at the same height; The upper die mechanism is fixed to the upper base of the spinning machine and, during operation, is pressed down by the upper base to fit against the lower die mechanism; the lower die mechanism is fixed to the lower base of the spinning machine and rotates at high speed under the drive of the lower spindle during operation; the spinning wheel mechanism is connected to the radial cylinder of the equipment and, during operation, according to the shape of the evenly distributed pulley, moves horizontally close to the upper die mechanism and the lower die mechanism; the unloading mechanism is located inside the upper die mechanism; At the contact position of the upper mold mechanism and the lower mold mechanism, the upper mold mechanism and the lower mold mechanism are the same size, so that after the blank material is pressed between the upper mold mechanism and the lower mold mechanism, the part that extends out of the contact surface between the upper mold mechanism and the lower mold mechanism can extend upward and downward simultaneously under the action of the rotating wheel mechanism. The upper mold mechanism includes an upper conversion seat, an upper mold, and an upper positioning block; the upper conversion seat is positioned and combined with the upper base using a stop; a stop is also provided between the upper mold and the upper conversion seat, and they are fixed with bolts; the bottom shape of the upper mold corresponds to the shape of the top surface of the evenly distributed pulley; the upper positioning block is located below the upper mold; a positioning spring is provided between the upper positioning block and the upper mold; the upper positioning block slightly protrudes from the bottom surface of the upper mold. The ejection mechanism includes an ejection block, an ejection spring, and a stop block; the ejection block, ejection spring, and stop block are all disposed inside the upper positioning block; an opening is provided at the bottom of the upper positioning block, and the stop block, ejection spring, and ejection block are sequentially embedded in the opening, with the ejection block located on the outward side of the opening and the stop block located on the inward side of the opening; the stop block fits against the bottom of the opening of the upper positioning block, one end of the ejection spring fits against the stop block, and the other end fits against the ejection block, thereby pushing the ejection block outward from the opening.

2. The boss-divided belt pulley spinning fixture according to claim 1, characterized in that, The lower mold mechanism includes a lower conversion seat, a lower mold, and a lower positioning block; The lower conversion seat is positioned and combined with the lower base using a stop; a stop is also provided between the lower mold and the lower conversion seat, and they are fixed with bolts; the top shape of the lower mold corresponds to the shape of the bottom surface of the evenly distributed pulley of the boss; the lower positioning block is located above the lower mold.

3. The boss-divided belt pulley spinning fixture according to claim 1, characterized in that, The spinning wheel mechanism includes a spinning wheel and a spinning wheel mounting base; The rotating wheel fixing seat is fixed on the radial cylinder of the equipment and moves horizontally under the drive of the radial cylinder; the radial cylinder of the equipment is driven to move horizontally by the spinning machine; the rotating wheel is mounted on the rotating wheel fixing seat and passively rotates around the rotating wheel fixing seat.

4. The boss-divided belt pulley spinning fixture according to claim 3, characterized in that, The rotating wheels are multiple in number and are made of high-carbon mold steel. The multiple rotating wheels have different shapes and match the shape of the boss-divided pulley. During the processing, they are sequentially pressed and adhered to the raw material to finally form the boss-divided pulley.

5. The boss-divided belt pulley spinning fixture according to claim 3, characterized in that, A bearing is installed on the rotating wheel fixing seat, and the outer diameter of the bearing matches the inner diameter of the rotating wheel's inner hole.

6. A spinning method using the boss-divided pulley spinning fixture as described in claim 1, comprising the steps of: Step S100: Install the blank material on the lower mold mechanism and use the lower positioning block to complete the rough positioning of the blank material; In step S200, the spinning machine drives the upper die mechanism to press down until the upper positioning block located at the bottom of the upper die mechanism is in contact with the upper surface of the blank material and presses and fixes the blank material. Step S300: The spinning machine uses the spinning wheel mechanism to spin the blank raw material; In step S400, the spinning machine drives the upper die mechanism to move upward, and the upper die mechanism separates from the lower die mechanism; In step S500, the unloading mechanism operates to separate the processed boss-split pulley from the upper mold mechanism; the boss-split pulley is then removed.

7. The spinning method according to claim 6, characterized in that, Step S200 includes the following steps: Step S201: The upper positioning block is attached to the upper surface of the blank material to complete the fine positioning of the blank material; In step S202, the upper mold mechanism continues to descend, and the positioning spring is compressed until the upper mold is completely in contact with the upper surface of the blank material, pressing the blank material tightly.

8. The spinning method according to claim 6, characterized in that, Step S300 includes the following steps: In step S301, the spinning machine drives the upper die mechanism, which in turn drives the lower die mechanism and the fixed blank material to rotate together. In step S302, the spinning wheel mechanism moves horizontally under the drive of the spinning machine, while the radial cylinder of the equipment actuates to drive the spinning wheel mechanism to move laterally. In step S303, when the rotating wheel mechanism contacts and compresses the blank material, the rotating wheel mounted on the rotating wheel fixing seat is obstructed by the blank material and rotates around the rotating wheel fixing seat.

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