A spinning production equipment and production method for a transmission wheel with a wide bearing surface

Abstract

The present invention discloses a spinning production device and method for a transmission wheel with a wide bearing surface. The production method comprises the following steps: providing a spinning blank with a prefabricated hole in the middle; clamping the spinning blank and driving it to rotate, splitting the prefabricated hole in the spinning blank, extending the two sides of the spinning blank, and pushing and leveling the extended material on both sides to form a semi-finished internal rotation bearing seat; clamping the semi-finished internal rotation bearing seat and driving it to rotate, spinning the semi-finished internal rotation bearing seat to form an external gear, thereby obtaining a spinning finished product; and trimming burrs on the spinning finished product and precision turning the inner shell of the intermediate bearing seat to obtain a finished transmission wheel. The present invention has the advantages of high production efficiency and greater raw material conservation, and maximizes the ductility of the material to achieve the production of transmission wheels with a wide bearing surface.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission wheel processing, and in particular to a spinning production device and a production method for a transmission wheel with a wide bearing surface. Background Art

[0002] With the development of science and technology, spinning technology has been widely used in the processing of rotary mechanical parts, replacing traditional processes such as casting, stamping, and cutting. Compared with traditional processes, it offers many advantages, including saving raw materials, high production efficiency, low energy consumption, environmental protection, lighter product structure, high structural strength, high hardness and wear resistance due to cold working hardening. Therefore, spinning technology is particularly widely used in the automotive parts industry, such as automobile wheel hub spinning and transmission wheel spinning.

[0003] Applying spinning technology to the forming process of some transmission wheels on automobile engines can greatly improve production efficiency, reduce costs, reduce pollution and energy consumption, and bring good social benefits. However, transmission wheels with an "I"-shaped cross-section formed around a central axis are still processed and formed using traditional processes such as "casting + turning", "forging + turning" or seamless pipe turning. These processes have the disadvantages of more steps, large waste of raw materials and low production efficiency. The Chinese invention patent "A Pulley Spinning Production Process" with patent number "CN201210491804.7" discloses a spinning process for pulleys with an intermediate shaft hole, but the spinning process still has the following shortcomings:

[0004] First, in order to achieve the formation of the intermediate shaft hole step, a thicker sheet metal blank is required, which requires a higher thickness of the raw material;

[0005] Second, two machines are required to perform secondary spinning to form the steps at both ends of the transmission wheel, which is time-consuming and labor-intensive, increasing production costs.

[0006] Third, after the middle shaft hole step is formed, the material within the middle shaft hole step needs to be stamped or cut. This process is time-consuming and labor-intensive, and the material within the middle shaft hole step will still be wasted, resulting in a problem of raw material waste. Summary of the Invention

[0007] To this end, the present invention proposes a wide bearing surface transmission wheel spinning production equipment and production method to solve the technical problems of low production efficiency, low yield, low product quality and high production cost of the existing production process.

[0008] The present invention adopts the following technical solutions:

[0009] A spinning production equipment for a wide bearing surface transmission wheel includes an internal spinning forming machine and a multi-wheel forming spinning machine. The internal spinning forming machine is used to spin an intermediate bearing seat on a spinning blank to obtain a semi-finished internal spinning bearing seat; the multi-wheel forming spinning machine is used to spin the external teeth of the semi-finished internal spinning bearing seat to obtain a finished spinning product.

[0010] The internal spinning forming machine includes a first main shaft, a first movable shaft and an internal spinning forming wheel. The first main shaft is equipped with an internal spinning lower die, and the first movable shaft is equipped with an internal spinning upper die. The spun blank is clamped by the internal spinning lower die and the internal spinning upper die, and driven to rotate; the internal spinning forming wheel is installed in the first main shaft. The internal spinning forming wheel is a first internal spinning wheel for splitting and extending and a second internal spinning wheel for pushing and leveling. The first internal spinning wheel is provided with a sharp corner to split the prefabricated hole of the spun blank from the center line and extend it to both sides. The second internal spinning wheel pushes the extended material on both sides of the split spun blank forward and backward to level it, forming an internal spinning bearing seat semi-finished product.

[0011] Furthermore, the first inner wheel includes two sections arranged in sequence from front to back, the diameter of the first section of the first inner wheel is smaller than the diameter of the prefabricated hole of the spun blank, so that the first section of the first inner wheel can extend into it; and the first section of the first inner wheel has a sharp corner with a maximum diameter smaller than the diameter of the prefabricated hole, so as to split the prefabricated hole of the spun blank from the center line; the diameter of the second section of the first inner wheel gradually increases, so as to extend the split prefabricated hole to both sides.

[0012] Furthermore, a spinning section is provided at the front end of the second inner rotating wheel, and the diameter of the spinning section is smaller than the minimum diameter of the hole formed after the splitting and extension by the first inner rotating wheel, so that the material extended on both sides of the hole formed after the splitting and extension by the first inner rotating wheel is pushed forward and pushed backward to be leveled.

[0013] Furthermore, a radial feed drive source and an axial feed drive source are provided at the rear of the first spindle and are respectively connected to the inner spinning forming wheel to drive the radial feed and axial feed of the inner spinning forming wheel respectively.

[0014] Furthermore, a gap is left between the inner spinning forming wheel and the center holes of the inner spinning upper die and the inner spinning lower die.

[0015] Furthermore, the first hypotrochoid and the second hypotrochoid are driven to rotate during the spinning process.

[0016] Furthermore, the multi-wheel forming spinning machine includes a second main shaft, a second movable shaft and an external tooth forming wheel, the second main shaft is equipped with an external tooth spinning lower die, the second movable shaft is equipped with an external tooth spinning upper die, and the internal rotating bearing seat semi-finished product is clamped by the external tooth spinning lower die and the external tooth spinning upper die, and driven to rotate; the external tooth forming wheels are distributed around the second main shaft, and the external tooth forming wheels include a first external tooth forming wheel for splitting spinning, a second external tooth forming wheel for leveling spinning, a third external tooth forming wheel for pre-tooth spinning, and a fourth forming wheel for fine tooth spinning.

[0017] Furthermore, gaps are left between the first external-tooth forming wheel, the second external-tooth forming wheel, the third external-tooth forming wheel and the fourth external-tooth forming wheel and the external-tooth spinning lower die and the external-tooth spinning upper die respectively.

[0018] The present invention also discloses a spinning production method for a transmission wheel with a wide bearing surface, which specifically comprises the following steps:

[0019] Step 1: Provide a spinning blank with a prefabricated hole in the middle;

[0020] Step 2: Clamp the spun blank and drive it to rotate, split the prefabricated hole of the spun blank, extend both sides, and push and level the extended materials on both sides to form a semi-finished internal rotating bearing seat;

[0021] Step 3: Clamp the semi-finished product of the internal rotation bearing seat and drive it to rotate, and perform external gear spinning operation on the semi-finished product of the internal rotation bearing seat to obtain a spinning finished product;

[0022] Step 4: Trim the burrs on the spinning product and fine-turn the inner shell size of the intermediate bearing seat to obtain the finished transmission wheel.

[0023] Furthermore, the step 2 specifically includes the following steps:

[0024] Step 2-1: Split the prefabricated hole of the spun blank from the center line, and extend both sides of the split prefabricated hole to both sides;

[0025] Step 2-2: Push the extended materials on both sides of the split spun blank forward and backward to level them, so that the extended materials on both sides of the spun blank flow forward and backward, continuously diffuse and push outward, thereby forming an intermediate bearing seat with a wide bearing surface and obtaining a semi-finished internal rotating bearing seat.

[0026] Furthermore, the step 3 specifically includes the following steps:

[0027] Step 3-1: Perform splitting and spinning operations on the internal rotation bearing seat semi-finished product to obtain an external gear splitting and spinning semi-finished product;

[0028] Step 3-2: performing a flattening and spinning operation on the split and spun outer gear semi-finished product to obtain a flattened and spun outer gear semi-finished product;

[0029] Step 3-3: performing a pre-spinning operation on the outer gear leveling spinning semi-finished product to obtain a pre-spinning gear spinning semi-finished product;

[0030] Step 3-4: Perform finishing spinning operation on the pre-spinning gear spinning semi-finished product to obtain the transmission wheel spinning finished product.

[0031] After adopting the above scheme, the present invention has the following beneficial effects:

[0032] First, the spinning blank required in this application uses less material than the forging blank, saving raw materials and reducing raw material costs;

[0033] Second, the entire production cycle is short and two horizontal CNC forming spinning machines perform spinning in separate processes, which greatly improves production efficiency and reduces energy consumption, saving energy and protecting the environment;

[0034] Third, it is suitable for the production of various annular metal transmission wheels with bearing seats in the middle, with strong applicability, high production yield rate and high quality of finished products; and the mold loss is small and the mold service life is long;

[0035] Fourth, maximize the use of the material's ductility to achieve the production of transmission wheels with wide bearing surfaces.

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 FIG. 1 is a schematic structural diagram of an internal spinning machine for forming an internal spinning mold according to Example 1;

[0038] Figure 2 FIG2 is a schematic structural diagram of the first hypocycloid of Example 1;

[0039] Figure 3 FIG2 is a schematic structural diagram of the second hypotrochoid of Example 1;

[0040] Figure 4 The figure shows the structure of the multi-rotor spinning machine of Example 1;

[0041] Figure 5 Shown Figure 4 sectional view of

[0042] Figure 6 Shown is a flow chart of the production method of Example 2.

[0043] Description of labels:

[0044] Internal spinning machine 1, first main shaft 11, first movable shaft 12, internal spinning wheel 13, first internal spinning wheel 131, first section 1311 of first internal spinning wheel 131, second section 1312 of first internal spinning wheel 131, second internal spinning wheel 132, spinning section 1321, internal spinning lower die 14, internal spinning upper die 15;

[0045] Multi-wheel forming spinning machine 2, second main shaft 21, second movable shaft 22, external gear forming wheel 23, first external gear forming wheel 231, second external gear forming wheel 232, third external gear forming wheel 233, fourth external gear forming wheel 234, external gear spinning lower die 24, external gear spinning upper die 25;

[0046] Spinning blank 3, internal spinning bearing seat semi-finished product 4, external gear splitting spinning semi-finished product 41, external gear leveling spinning semi-finished product 42, pre-spinning gear spinning semi-finished product 43, spinning finished product 5. DETAILED DESCRIPTION

[0047] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0048] At the same time, the directions such as front, back, left, and right involved in this embodiment are only used as a reference for directions and do not represent directions in actual use.

[0049] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0050] Example 1:

[0051] See Figures 1 to 5 As shown, as a preferred embodiment of the present invention, a wide bearing surface transmission wheel spinning production equipment is provided, including an internal spinning forming spinning machine 1 and a multi-wheel forming spinning machine 2. The internal spinning forming spinning machine 1 is used to spin the intermediate bearing seat of the spinning blank 3 to obtain the internal spinning bearing seat semi-finished product 4; the multi-wheel forming spinning machine 2 is used to spin the external teeth of the internal spinning bearing seat semi-finished product 4 to obtain the spun finished product 5. In this embodiment, two horizontal CNC forming spinning machines are used to perform spinning in different steps. One horizontal CNC forming spinning machine realizes the spinning of the bearing seat of the transmission wheel, and the other realizes the spinning of the external teeth of the transmission wheel. The production efficiency is greatly improved, and energy consumption is reduced, energy saving and environmental protection are achieved. It can be applied to the production of various annular metal transmission wheels with a bearing seat in the middle, and has strong applicability; the production yield is high, the finished product quality is high; and the mold loss is small and the mold service life is long.

[0052] In this embodiment, refer to Figure 1 As shown, the internal spinning machine 1 is a horizontal CNC internal spinning machine, including a hydraulic system, a CNC system, a spinning machine body, a machine base, and a lubrication system. The hydraulic system, CNC system, spinning machine body, and lubrication system are located on the machine base and controlled by the CNC system. The spinning machine body includes a first spindle 11, a first movable shaft 12, and an internal spinning wheel 13. The first spindle 11 is connected to a first spindle motor, and the first movable shaft 12 is connected to a first movable shaft motor. The first spindle motor and the first movable shaft motor respectively drive the first spindle 11 and the first movable shaft 12 to rotate concentrically and in the same direction. The first movable shaft 12 is also connected to a first movable shaft hydraulic cylinder to control the axial movement of the first movable shaft 12, so as to move closer to or away from the first spindle 11. An internal spinning lower die 14 is installed on the first main shaft 11, and an internal spinning upper die 15 is installed on the first movable shaft 12. The spun blank 3 is clamped by the internal spinning lower die 14 and the internal spinning upper die 15. After clamping the spun blank 3, the first main shaft 11 and the first movable shaft 12 rotate synchronously at the same speed and in the same direction to drive the spun blank 3 to rotate.

[0053] Among them, continue to refer to Figure 1 As shown, the internal spinning forming wheel 13 is installed in the first main shaft 11, and a gap is left between the internal spinning forming wheel 13 and the center holes of the internal spinning upper mold 15 and the internal spinning lower mold 14 to avoid interference between the internal spinning forming wheel 13 and the internal spinning upper mold 15 and the internal spinning lower mold 14, which would affect the operation. The inner spinning forming wheel 13 is composed of a first inner spinning wheel 131 for splitting and extending and a second inner spinning wheel 132 for pushing and leveling. The first inner spinning wheel 131 splits the prefabricated hole of the spun blank 3 from the center line and extends it to both sides. The second inner spinning wheel 132 pushes the extended material on both sides of the split spun blank 3 forward and backward to level it, forming an inner spinning bearing seat semi-finished product 4; the rear part of the first main shaft 11 is also provided with a radial feed drive source and an axial feed drive source, which are respectively connected to the inner spinning forming wheel 13, and the inner spinning forming wheel 13 is driven by the radial feed drive source to perform radial feed movement, and the inner spinning forming wheel 13 is driven by the axial feed drive source to perform axial feed movement. The first hypotrochoid 131 and the second hypotrochoid 132 rotate independently during the spinning process. In this embodiment, the first hypotrochoid 131 and the second hypotrochoid 132 are disposed within the first main shaft 11. During the spinning process, the first hypotrochoid 131 and the second hypotrochoid 132 rotate independently through the drive of the first main shaft 11.

[0054] See Figures 1 to 3As shown, the first inner rotating wheel 131 includes two sections arranged in sequence from front to back, and the diameter of the first section 1311 of the first inner rotating wheel is smaller than the diameter of the prefabricated hole of the spun blank 3, so that the first section 1311 of the first inner rotating wheel can extend into it; and the first section 1311 of the first inner rotating wheel has a sharp angle whose maximum diameter is smaller than the diameter of the prefabricated hole, so as to split the prefabricated hole of the spun blank 3 from the center line; the diameter of the second section 1312 of the first inner rotating wheel gradually increases, and the split prefabricated hole is extended to both sides; a spinning forming section 1321 is provided at the front end of the second inner rotating wheel 132, and the diameter of the spinning forming section 1321 is smaller than the minimum diameter of the hole formed after the splitting and extension by the first inner rotating wheel 131, and the material extended on both sides of the hole formed after the splitting and extension by the first inner rotating wheel 131 is pushed forward and backward to level it. Specifically, the action processes of the first inner rotary wheel 131 and the second inner rotary wheel 132 are as follows: the first inner rotary wheel 131 is first installed in the first main shaft 11, and after the inner spinning lower die 14 and the inner spinning upper die 15 clamp the spun blank 3, the first main shaft 11 and the first movable shaft 12 rotate synchronously at the same speed and in the same direction to drive the spun blank 3 to rotate, and the first section 1311 of the first inner rotary wheel extends into the middle prefabricated hole of the spun blank 3, and the sharp corner of the first section 1311 of the first inner rotary wheel is aligned with the prefabricated hole of the spun blank 3, and the first inner rotary wheel 131 is driven to feed radially by the radial feed driving source to split the spun blank 3 from the center line position, and then the first inner rotary wheel 131 is continued to be driven to feed radially by the radial feed driving source to make the first inner rotary wheel The second section 1312 is radially spun from the middle to expand the prefabricated hole, so that the materials on both sides after the split are extended to both sides; after completing the above actions, the second inner rotating wheel 132 is installed in the first main shaft 11, and the contour center of the second inner rotating wheel 132 is aligned with the center of the spun blank 3. The second inner rotating wheel 132 moves axially to the middle of the spun blank 3, and then when it is radially fed to the appropriate position, the second inner rotating wheel 132 is driven axially by the axial feed drive source to make the second inner rotating wheel 132 obtain the spinning forming section 1321 of the second inner rotating wheel 132 push the materials extended on both sides of the split spun blank 3 forward and backward to expand, and push the materials extended on both sides of the split spun blank 3 forward and backward to level them, thereby obtaining the inner rotating bearing seat semi-finished product 4. In this embodiment, the design of the internal spinning forming wheel 13 is adopted, so that the prefabricated hole of the spun blank 3 is split from the center line position and extended to both sides after the spun blank 3 is spun by the first internal spinning wheel 131. At this stage, the width of the intermediate bearing surface formed by the spun blank 3 is relatively narrow, which cannot meet the forming requirements of the wide bearing surface transmission wheel; when the second internal spinning wheel 132 is spinning, the material extending on both sides of the split spun blank 3 is pushed forward and backward by the spinning forming section 1321 of the second internal spinning wheel 132, so that the material extending on both sides of the split spun blank 3 flows, continuously expands and accumulates outward, thereby forming the intermediate bearing seat of the wide bearing surface, meeting the width requirement of the bearing surface of the wide bearing surface transmission wheel.In the present application, the internal spinning forming wheel 13 is designed as two spinning wheels with two sections of different profiles, which realizes the spinning forming of the intermediate bearing seat of the spun blank 3 from the inside to the outside. Compared with the existing technology of spinning the intermediate bearing seat from the outside to the inside, there is no need to use a thicker sheet metal blank, and the thickness requirement for the raw material is lower; and there will be no waste of the intermediate material of the spun blank, and there is no need to perform secondary operations of stamping or cutting the material within the step of the intermediate shaft hole, which is more time-saving and labor-saving; finally, only one internal spinning forming machine 1 is needed to realize the forming of the intermediate bearing seat, reducing production costs.

[0055] In this embodiment, the multi-rotor forming spinning machine 2 adopts a horizontal CNC internal spinning forming spinning machine, which also includes a hydraulic system, a CNC system, a spinning machine body, a machine base and a lubrication system; the hydraulic system, CNC system, the spinning machine body and the lubrication system are arranged on the machine base and are controlled by the CNC system. Figures 2 to 3 As shown, the main body of the multi-wheel forming spinning machine 2 includes a second main shaft 21, a second movable shaft 22 and an external gear forming wheel 23. The second main shaft 21 is connected to a second main shaft motor, and the second movable shaft 22 is connected to a second movable shaft motor. The second main shaft 21 and the second movable shaft 22 are driven by the second main shaft motor and the second movable shaft motor respectively to rotate concentrically and in the same direction. The second movable shaft 22 is also connected to a second movable shaft hydraulic cylinder to control the axial movement of the second movable shaft 22 to move closer to or away from the second main shaft 21. An external gear spinning lower die 24 is installed on the second main shaft 21, and an external gear spinning upper die 25 is installed on the second movable shaft 22. The internal rotation bearing seat semi-finished product 4 is clamped by the external gear spinning lower die 24 and the external gear spinning upper die 25. After clamping the internal rotation bearing seat semi-finished product 4, the second main shaft 21 and the second main shaft motor rotate synchronously at the same speed and in the same direction to drive the internal rotation bearing seat semi-finished product 4 to rotate.

[0056] Among them, see Figures 4 and 5As shown, the external tooth forming wheels 23 are distributed around the second main shaft 21, and the external tooth forming wheels 23 include a first external tooth forming wheel 231 for splitting and spinning, a second external tooth forming wheel 232 for leveling and spinning, a third external tooth forming wheel 233 for pre-tooth spinning, and a fourth forming wheel 234 for fine tooth spinning. Thus, the semi-finished product 4 of the internal rotation bearing seat passes through the first external tooth forming wheel 231 for splitting and forming, so that the outer circle material of the semi-finished product 4 of the internal rotation bearing seat is cut from the thickness. The outer gear splitting semi-finished product 41 is split and extended to both sides; the outer gear splitting semi-finished product 41 then passes through the outer gear second forming wheel 232 for flattening and spinning, resulting in the outer gear flattening semi-finished product 42; the outer gear flattening semi-finished product 42 then passes through the outer gear third forming wheel 233 for pre-spinning, resulting in the pre-spinning semi-finished product 43; the pre-spinning semi-finished product 43 then passes through the outer gear fourth forming wheel 234 for finishing spinning, resulting in the transmission wheel spinning product 5. Furthermore, gaps are left between the four outer gear forming wheels 23 and the outer gear spinning lower die 24 and the outer gear spinning upper die 25 to ensure that the outer gear forming wheels 23, the outer gear spinning lower die 24, and the outer gear spinning upper die 25 do not interfere with each other. In other embodiments, the first external tooth forming wheel 231 can also be a spinning wheel that performs pre-bending spinning operations, so that the internal rotating bearing seat semi-finished product 4 can be pre-bent spinning, leveling spinning, pre-tooth spinning and fine tooth spinning in sequence, and a spinning finished product can also be obtained.

[0057] The specific production process of the wide bearing surface transmission wheel spinning production equipment is as follows:

[0058] Punching and blanking: according to the calculation of various specifications of transmission wheels, sheet materials of appropriate thickness and size are selected, and the sheet materials are punched and blanked to obtain spinning blanks 3;

[0059] The spun blank 3 is placed on the inner spinning lower die 14 of the inner spinning forming spinning machine 1, and the first inner rotating wheel 131 is installed on the first main shaft 11, and the first section of the first inner rotating wheel 131 is extended into the prefabricated hole in the middle of the spun blank 3; the first movable shaft 12 is driven to move axially to drive the inner spinning upper die 15 to approach the inner spinning lower die 14 and clamp the spun blank 3. After clamping the spun blank 3, the first main shaft 11 and the first movable shaft 12 are driven to rotate synchronously at the same speed and in the same direction; the first inner rotating wheel 131 is driven by the radial feed drive source to feed radially, and the first inner rotating wheel 131 presses the prefabricated hole in the middle of the spun blank 3 from the inside to the outside. The hole is formed and spinning is performed to split the spun blank 3 from the center line position and extend to both sides; after the first stage of spinning is completed, the second inner rotating wheel 132 is installed on the first main shaft 11, and the spinning forming section 1321 of the second inner rotating wheel 132 is radially fed to a predetermined position. The second inner rotating wheel 132 is axially fed under the action of the axial feed drive source to perform the second stage of spinning. The second inner rotating wheel 132 pushes the material extending on both sides of the split spun blank 3 forward and backward to expand, pushes the material extending on both sides of the split spun blank 3 forward and backward to flatten it, thereby obtaining the inner rotating bearing seat semi-finished product 4;

[0060] The inner rotating bearing seat semi-finished product 4 is placed on the outer gear spinning lower die 24 of the multi-rotor forming spinning machine 2, and the second movable shaft 12 is driven to move axially to drive the outer gear spinning upper die 25 to approach the outer gear spinning lower die 24 and clamp the inner rotating bearing seat semi-finished product 4. After clamping the inner rotating bearing seat semi-finished product 4, the second main shaft 21 and the second movable shaft 22 are driven to rotate synchronously at the same speed and in the same direction; the inner rotating bearing seat semi-finished product 4 passes through the outer gear first forming wheel 231 to split and form the inner rotating bearing seat semi-finished product 4. The outer cylindrical material is split from the middle of the thickness and extended to both sides to obtain an outer gear split spinning semi-finished product; the outer gear split spinning semi-finished product passes through the outer gear second forming wheel 232 for flattening and spinning to obtain an outer gear flattening and spinning semi-finished product; the outer gear flattening and spinning semi-finished product passes through the outer gear third forming wheel 233 for pre-spinning and spinning to obtain a pre-spinning and spinning semi-finished product; the pre-spinning and spinning semi-finished product passes through the outer gear fourth forming wheel 234 for finishing and spinning to obtain a transmission wheel spinning product;

[0061] The finished spinning product of the transmission wheel is placed on a CNC lathe to trim burrs and fine-turn the inner hole size of the middle bearing seat to obtain the finished transmission wheel.

[0062] Example 2:

[0063] See Figure 6 As shown, this embodiment provides a method for spinning a transmission wheel with a wide bearing surface, which specifically includes the following steps:

[0064] Step 1: Provide a spinning blank with a prefabricated hole in the middle;

[0065] Step 2: Clamp the spun blank and drive it to rotate, split the prefabricated hole of the spun blank, extend both sides, and push and level the extended materials on both sides to form a semi-finished internal rotating bearing seat;

[0066] Step 3: Clamp the semi-finished product of the internal rotation bearing seat and drive it to rotate, and perform external gear spinning operation on the semi-finished product of the internal rotation bearing seat to obtain a spinning finished product;

[0067] Step 4: Trim the burrs on the spinning product and fine-turn the inner shell size of the intermediate bearing seat to obtain the finished transmission wheel.

[0068] Furthermore, the step 1 specifically includes selecting a sheet material and punching and blanking the sheet material to obtain a spun blank with a prefabricated hole in the middle.

[0069] Furthermore, the step 2 specifically includes the following steps:

[0070] Step 2-1: Split the prefabricated hole of the spun blank from the center line, and extend both sides of the split prefabricated hole to both sides;

[0071] Step 2-2: Push the extended materials on both sides of the split spun blank forward and backward to level them, so that the extended materials on both sides of the spun blank flow forward and backward, continuously diffuse and push outward, thereby forming an intermediate bearing seat with a wide bearing surface and obtaining a semi-finished internal rotating bearing seat.

[0072] Furthermore, the step 3 specifically includes the following steps:

[0073] Step 3-1: Perform splitting and spinning operations on the internal rotation bearing seat semi-finished product to obtain an external gear splitting and spinning semi-finished product;

[0074] Step 3-2: performing a flattening and spinning operation on the split and spun outer gear semi-finished product to obtain a flattened and spun outer gear semi-finished product;

[0075] Step 3-3: performing a pre-spinning operation on the outer gear leveling spinning semi-finished product to obtain a pre-spinning gear spinning semi-finished product;

[0076] Step 3-4: Perform finishing spinning operation on the pre-spinning gear spinning semi-finished product to obtain the transmission wheel spinning finished product.

[0077] Alternatively, in other embodiments, step 3 may specifically include the following steps:

[0078] Step 3-1: Perform pre-bending and spinning operations on the semi-finished product of the internal rotation bearing seat to obtain the pre-bent and spun semi-finished product of the external gear;

[0079] Step 3-2: performing a flattening and spinning operation on the external gear pre-bent spinning semi-finished product to obtain an external gear flattening and spinning semi-finished product;

[0080] Step 3-3: performing a pre-spinning operation on the outer gear leveling spinning semi-finished product to obtain a pre-spinning gear spinning semi-finished product;

[0081] Step 3-4: Perform finishing spinning operation on the pre-spinning gear spinning semi-finished product to obtain the transmission wheel spinning finished product.

[0082] Furthermore, the step 4 is specifically to place the spinning product on a CNC lathe to trim burrs and fine-turn the inner hole size of the middle bearing seat to obtain a finished transmission wheel.

[0083] Of course, the present wide bearing surface transmission wheel spinning production method can be implemented by the wide bearing surface transmission wheel spinning production equipment described in Example 1, or in other embodiments, a combination of multiple devices can be used to spin to implement the above-mentioned wide bearing surface transmission wheel spinning production method, which is not limited in this article.

[0084] The wide bearing surface drive wheel spinning production equipment and method provided by the present invention spins the prefabricated hole of the spinning blank from the inside out to form an intermediate bearing seat. This results in a smaller sheet material footprint than forged blanks, saving raw materials and reducing raw material costs. The entire production cycle is short, production efficiency is significantly improved, energy consumption is reduced, and environmental protection is achieved. The equipment requirements are low, mold wear is minimal, and mold service life is long. The production process is suitable for the production of various annular metal drive wheels with intermediate bearing seats, with strong applicability, a high production yield rate, and high-quality finished products. The entire process is cold-formed, with the pulley tooth surfaces cold-work hardened, resulting in high strength, hardness, and wear resistance. No heating, forging, or welding is required, making the process environmentally friendly.

[0085] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the scope of protection of the present invention.

Claims

1. A spinning production equipment for a wide bearing surface drive wheel, characterized by: It includes an internal spinning forming machine and a multi-wheel forming spinning machine. The internal spinning forming machine is used to spin the intermediate bearing seat of the spinning blank to obtain the internal spinning bearing seat semi-finished product; the multi-wheel forming spinning machine is used to spin the external gear of the internal spinning bearing seat semi-finished product to obtain the spinning finished product; The internal spinning forming machine includes a first main shaft, a first movable shaft and an internal spinning forming wheel. The first main shaft is equipped with an internal spinning lower die, and the first movable shaft is equipped with an internal spinning upper die. The spinning blank is clamped by the internal spinning lower die and the internal spinning upper die and driven to rotate; the internal spinning forming wheel is installed in the first main shaft, and the internal spinning forming wheel is composed of a first internal spinning wheel for splitting and extending and a second internal spinning wheel for pushing and leveling. The first internal spinning wheel is provided with a sharp angle to split the prefabricated hole of the spinning blank from the center line and extend it to both sides. The second internal spinning wheel pushes the extended material on both sides of the split spinning blank forward and backward to level it, so as to form a semi-finished internal spinning bearing seat; The first hypotrochoid includes two sections arranged sequentially from front to back. The diameter of the first section of the first hypotrochoid is smaller than the diameter of the preformed hole of the spun blank so that the first section of the first hypotrochoid can be inserted into the preformed hole. The first section of the first hypotrochoid has a sharp corner with a maximum diameter smaller than the diameter of the preformed hole so as to split the preformed hole of the spun blank from the center line. The diameter of the second section of the first hypotrochoid gradually increases so as to extend the split preformed hole to both sides. A spinning section is provided at the front end of the second inner wheel, the diameter of which is smaller than the minimum diameter of the hole formed after splitting and extending by the first inner wheel, and the material extended on both sides of the hole formed after splitting and extending by the first inner wheel is pushed forward and backward to be leveled.

2. The spinning production equipment for wide bearing surface drive wheels according to claim 1, characterized in that: The rear portion of the first spindle is further provided with a radial feed drive source and an axial feed drive source which are respectively connected to the inner spinning forming wheel to drive the radial feed and axial feed of the inner spinning forming wheel respectively.

3. The spinning production equipment for wide bearing surface drive wheels according to claim 1, characterized in that: A gap is left between the inner spinning forming wheel and the center holes of the inner spinning upper die and the inner spinning lower die.

4. The spinning production equipment for wide bearing surface drive wheels according to claim 1, characterized in that: The first hypotrochoid and the second hypotrochoid are driven to rotate during the spinning process.

5. The spinning production equipment for wide bearing surface drive wheels according to claim 1, characterized in that: The multi-wheel forming spinning machine includes a second main shaft, a second movable shaft and an external gear forming wheel. The second main shaft is equipped with an external gear spinning lower die, the second movable shaft is equipped with an external gear spinning upper die, and the internal gear bearing seat semi-finished product is clamped by the external gear spinning lower die and the external gear spinning upper die, and driven to rotate; the external gear forming wheels are distributed around the second main shaft, and the external gear forming wheels include a first external gear forming wheel for splitting spinning, a second external gear forming wheel for leveling spinning, a third external gear forming wheel for pre-tooth spinning, and a fourth forming wheel for fine tooth spinning.

6. The spinning production equipment for wide bearing surface drive wheels according to claim 5, characterized in that: There are gaps between the first external-tooth forming wheel, the second external-tooth forming wheel, the third external-tooth forming wheel and the fourth external-tooth forming wheel and the external-tooth spinning lower die and the external-tooth spinning upper die respectively.

7. A spinning production method for a transmission wheel with a wide bearing surface, characterized in that: The wide bearing surface transmission wheel spinning production equipment according to claim 6 specifically includes the following steps: Step 1: Provide a spinning blank with a prefabricated hole in the middle; Step 2: Clamp the spun blank and drive it to rotate, split the prefabricated hole of the spun blank, extend both sides, and push and level the extended materials on both sides to form a semi-finished internal rotating bearing seat; Step 3: Clamp the semi-finished product of the internal rotation bearing seat and drive it to rotate, and perform external gear spinning operation on the semi-finished product of the internal rotation bearing seat to obtain a spinning finished product; Step 4: Trim the burrs on the spinning product and fine-turn the inner shell size of the intermediate bearing seat to obtain the finished transmission wheel.

8. The spinning production method for a wide bearing surface transmission wheel according to claim 7, characterized in that: The step 2 specifically includes the following steps: Step 2-1: Split the prefabricated hole of the spun blank from the center line, and extend both sides of the split prefabricated hole to both sides; Step 2-2: Push the extended materials on both sides of the split spun blank forward and backward to level them, so that the extended materials on both sides of the spun blank flow forward and backward, continuously diffuse and push outward, thereby forming an intermediate bearing seat with a wide bearing surface and obtaining a semi-finished internal rotating bearing seat.

9. The spinning production method for a transmission wheel with a wide bearing surface according to claim 8, characterized in that: The step 3 specifically includes the following steps: Step 3-1: Perform splitting and spinning operations on the internal rotation bearing seat semi-finished product to obtain an external gear splitting and spinning semi-finished product; Step 3-2: performing a flattening and spinning operation on the split and spun semi-finished product of the external gear to obtain a flattened and spun semi-finished product of the external gear; Step 3-3: performing a pre-spinning operation on the outer gear leveling spinning semi-finished product to obtain a pre-spinning spinning semi-finished product; Step 3-4: Perform finishing spinning operation on the pre-spinning gear spinning semi-finished product to obtain the transmission wheel spinning finished product.

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