Outer diameter shaping tool for bearing ring forge piece
By using a tooling fixture for shaping the outer diameter of bearing ring forgings, and employing a shaping assembly and a shaping punch to perform closed-loop shaping of the bearing rings, the problems of elliptical and tilted rings are solved, improving product accuracy and processing efficiency, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOYANG LUOLING BEARING SCI & TECH
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-24
AI Technical Summary
In the existing technology, bearing rings are prone to ellipticity and tilting during the outer diameter shaping process, resulting in large vertical differences, which affects subsequent processing steps, increases scrap rate, and increases production costs.
A tooling for shaping the outer diameter of bearing ring forgings is used, including an upper template, a lower template, a crossbeam, a tie rod, the bearing ring, and a push rod. The bearing ring is shaped in a closed manner through the sizing assembly and the sizing punch to ensure the perpendicularity and accuracy of the ring.
It effectively eliminates the verticality difference and ellipticity of bearing rings, improves forging accuracy and machining efficiency, and reduces manufacturing costs for enterprises.
Smart Images
Figure CN224157552U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing ring forging technology, and in particular to a tooling for shaping the outer diameter of bearing ring forgings. Background Technology
[0002] As is well known, bearing rings are annular parts of radial rolling bearings with one or more raceways. They are tools that shape blanks into parts with specific shapes and dimensions under external force. In the existing technology, the outer diameter shaping of bearing rings usually adopts a bottom-opening lower die. Because the rings will become elliptical in the process before sizing, when the rings are placed on the inner conical surface of the sizing die manually or by a robot, the rings will tilt to varying degrees. When the sizing die is pressed down, the end face of the rings tilts downwards. The shaped bearing ring forging is directly discharged from under the lower die, resulting in a large vertical difference in the product and elliptical appearance on the outer raceway. This not only affects subsequent processing steps but also increases the scrap rate and production costs. Summary of the Invention
[0003] To overcome the shortcomings of the prior art, this utility model discloses a tooling for shaping the outer diameter of bearing ring forgings.
[0004] To achieve the aforementioned objective, this utility model adopts the following technical solution:
[0005] A tooling for shaping the outer diameter of a bearing ring forging includes an upper template, a lower template, a crossbeam, tie rods, a bearing ring, and a push rod. The upper template and the crossbeam are spaced apart vertically and are fixedly connected by tie rods on both sides. The lower template is fixed to a machining bed, and its two sides are respectively threaded through the tie rods on both sides. A lower die base is fixed in the middle of the upper part of the lower template. A diameter shaping assembly is provided in the die cavity of the lower die base. A diameter shaping pad is provided on the bottom surface of the cavity of the diameter shaping assembly. The bearing ring is located on the top of the diameter shaping pad. The lower end of the push rod passes through the diameter shaping assembly, the lower die base, and the lower template in sequence. A front and rear adjusting plate is fixed below the plate, and an upper die base is fixed below the front and rear adjusting plates. The upper die base and the lower die base are arranged correspondingly. A sizing rod is provided in the cavity of the upper die base. The sizing rod is stepped, with a larger diameter at the top and a smaller diameter at the bottom. The larger diameter section of the sizing rod is located in the cavity of the upper die base, and the outer side of the smaller diameter section is fitted with an upper die base cover and fixedly connected to the upper die base. The convex circle at the bottom of the sizing rod is set in the upper recess of the sizing punch. The bolt at the center of the sizing punch is fixedly connected to the sizing rod. The lower end of the sizing punch is pressed against the upper part of the bearing ring.
[0006] The outer diameter shaping fixture for the bearing ring forging has a "U" shaped lower die base with bolt holes on the lower extension surfaces on both sides. The lower die base is fixed to the lower template by bolts in the bolt holes.
[0007] The outer diameter sizing tooling for the bearing ring forging described above, the sizing assembly includes a die washer, a sizing die and a lower die seat gland. The lower die seat gland is fixed on the upper surface of the lower die seat by bolts. The sizing die and the die washer are arranged in the die cavity of the lower die seat from top to bottom in sequence. And the inner ring surface of the lower die seat gland and the upper part of the outer ring surface of the sizing die are in tapered surface fit. The lower die seat gland presses the sizing die tightly in the die cavity through the tapered surface. The inner ring surface of the sizing die is set as an inverted conical annular surface with a taper value of 3 - 4 degrees. The lower end step stage of the sizing punch is located in the sizing die, and the step surface is matched with the upper end surface of the sizing die. The concave cavity of the die washer is set as a stepped hole. The sizing lower pad is located on the first step. The upper end of the ejector rod is provided with an expanded diameter section, which is located on the second step of the stepped hole, and the upper end surface of the expanded diameter section contacts the lower surface of the sizing lower pad.
[0008] The outer diameter sizing tooling for the bearing ring forging described above, the upper die seat is in a "convex" shape and is fixed on the front and rear adjusting plates by bolts. The front and rear adjusting plates are fixed on the upper template by bolts.
[0009] The outer diameter sizing tooling for the bearing ring forging described above is provided with long round holes at the four corners of the front and rear adjusting plates. The upper die seat adjusts its position through the bolts in the long round holes to keep the concentricity with the lower die seat consistent.
[0010] Due to adopting the above technical solution, the utility model has the following beneficial effects:
[0011] The outer diameter sizing tooling for the bearing ring forging of the utility model extrudes and sizes the outer diameter of the bearing ring in the sizing assembly through the setting of the sizing punch. After sizing, the bearing ring is ejected by the ejector rod, realizing the closed sizing of the bearing ring forging. When the bearing ring contacts the sizing lower pad, the sizing punch continues to press down, the height of the bearing ring forging shrinks. After the height is pressed to the process dimension, the vertical difference, ovality and end face parallel difference of the bearing ring forging are basically eliminated. Compared with the prior art, the forging precision and turning processing efficiency are greatly improved, and the manufacturing cost of the enterprise is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the structural schematic diagram of the utility model.
[0013] In the figure: 1. Upper template; 2. Front and rear adjusting plates; 3. Upper die seat; 4. Upper die seat gland; 5. Sizing connecting rod; 6. Sizing punch; 7. Lower template; 8. Lower die seat; 9. Die washer; 10. Sizing die; 11. Lower die seat gland; 12. Sizing lower pad; 13. Bearing ring; 14. Pull rod; 15. Cross beam; 16. Ejector rod. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model.
[0015] According to the attached Figure 1 The outer diameter shaping tooling for the bearing ring forging as described includes an upper template 1, a lower template 7, a cross beam 15, a pull rod 14, a bearing ring 13, and a ejector rod 16. The upper template 1 and the cross beam 15 are arranged at an interval up and down and are fixedly connected by pull rods on both sides. The lower template 7 is fixed on the processing machine bed, and both sides of the lower template 7 are respectively inserted on the pull rods 14 on both sides. A lower die holder 8 is fixedly arranged in the middle on the upper surface of the lower template 7. A sizing component is arranged in the die cavity of the lower die holder 8. A sizing lower pad 12 is arranged on the concave cavity bottom surface of the sizing component. The bearing ring 13 is located above the sizing lower pad 12. The lower end of the ejector rod 16 sequentially passes through the sizing component, the lower die holder 8, and the lower template 7. A front and rear adjustment plate 2 is fixedly arranged under the upper template 1. An upper die holder 3 is fixedly arranged under the front and rear adjustment plate 2. The upper die holder 3 and the lower die holder 8 are arranged corresponding to each other up and down. A sizing connecting rod 5 is arranged in the concave die under the upper die holder 3. The sizing connecting rod 5 is in a stepped shape with a larger upper diameter and a smaller lower diameter. The large diameter section of the sizing connecting rod 5 is located in the concave die of the upper die holder 3. An upper die holder gland 4 is sleeved outside the small diameter section and is fixedly connected with the upper die holder 3. The convex circle at the bottom of the sizing connecting rod 5 is arranged in the depression on the upper surface of the sizing punch 6. The bolt at the center of the sizing punch 6 is fixedly connected with the sizing connecting rod 5. The lower end step section of the sizing punch 6 is pressed on the upper surface of the bearing ring 13. The sizing component includes a concave die washer 9, a sizing concave die 10, and a lower die holder gland 11. The lower die holder gland 11 is fixedly arranged on the upper surface of the lower die holder 8 through bolts. The sizing concave die 10 and the concave die washer 9 are arranged in the die cavity of the lower die holder 8 from top to bottom in sequence. The inner ring surface of the lower die holder gland 11 and the upper part of the outer ring surface of the sizing concave die 10 are in a tapered surface fit. The lower die holder gland 11 presses the sizing concave die 10 tightly in the die cavity through the tapered surface. The inner ring surface of the sizing concave die 10 is set as an inverted conical annular surface. The lower end step section of the sizing punch 6 is located in the sizing concave die 10, and the step surface is matched with the upper end surface of the sizing concave die 10. The concave cavity of the concave die washer 9 is set as a stepped hole. The sizing lower pad 12 is located on the first step. The upper end of the ejector rod 16 is provided with an expanding diameter section. The expanding diameter section is located on the second step of the stepped hole, and the upper end surface of the expanding diameter section contacts the lower surface of the sizing lower pad 12.
[0016] Furthermore, the lower die holder 8 is set as a "concave" - shaped structure. Bolt holes are arranged on the extending surfaces at the lower parts of both sides of the lower die holder 8. The lower die holder 8 is fixed on the lower template 7 through bolts in the bolt holes.
[0017] Furthermore, the upper die holder 3 is in a "convex" shape. The upper die holder 3 is fixed on the front and rear adjustment plate 2 through bolts. The front and rear adjustment plate 2 is fixed on the upper template 1 through bolts.
[0018] Furthermore, elongated holes are provided at the four corners of the front and rear adjustment plates 2, and the upper mold base 3 is adjusted to maintain the concentricity with the lower mold base 8 by bolts in the elongated holes.
[0019] Before use, the upper template 1 is fixed to the lower part of the hydraulic cylinder. The telescopic end of the hydraulic cylinder drives the upper template 1 to move up and down. The hydraulic cylinder is existing technology, and its specific structure and working principle will not be described in detail. During installation, the lower shim 12 is placed on the bottom surface of the cavity of the die washer 9. The bearing ring 13 is placed on the upper part of the die washer 9 and located in the inner ring inverted conical surface of the die 10. The lower die seat cover 11 is pressed onto the lower die seat 8 by bolts. The lower die seat cover 11 faces the die 10 through the inner conical surface. 0 and die washer 9 limit; the lower part of the upper template 1 is fixed with front and rear adjustment plates 2, the lower part of the front and rear adjustment plates 2 is installed with upper die base 3, the position of upper die base 3 is adjusted by the elongated hole on the front and rear adjustment plates 2 to keep it consistent with the concentricity of lower die base 8, the lower part of upper die base 3 is provided with sizing rod 5, the upper die base cover 4 fixes the sizing rod 5 in the mold cavity of upper die base 3 and fixes it by the tightening bolt on the outer circle surface; the sizing punch 6 is fixed to the sizing rod 5 with bolts and can move up and down with the oil cylinder;
[0020] During operation, the extension and retraction end of the hydraulic cylinder drives the upper template 1 to move downwards, thus causing the lower surface of the sizing punch 6 to contact the upper end face of the bearing ring 13 and press downwards. When the lower end face of the bearing ring 13 contacts the upper surface of the sizing pad 12, the hydraulic cylinder continues to move downwards, and the height of the bearing ring 13 gradually decreases. When the stepped surface of the sizing punch 6 contacts the upper end face of the sizing die 10, the upper and lower tooling dies close to form a closed forming, and the outer diameter and height dimensions of the bearing ring 13 are fixed, and the geometric accuracy is controlled. At this time, the hydraulic cylinder stops pressing downwards and returns upwards, the upper template 1 and the sizing punch 6 move upwards, and the pull rod 14 is fixed on the upper die. On plate 1, the crossbeam 15 is fixed on the tie rod 14. The tie rod 14 and the crossbeam 15 move upward with the oil cylinder. The lower template 7 is sleeved on the tie rod 14 and is slidably set with the tie rod 14. The lower template 7 is also fixed on the machine tool. Therefore, the upper surface of the crossbeam 15 contacts the lower end surface of the push rod 16 and moves upward. The upper end surface of the expansion section of the push rod 16 contacts the lower end surface of the calibrating lower pad 12 and moves upward. The upper surface of the calibrating lower pad 12 contacts the lower surface of the bearing ring 13 and moves upward. When the bearing ring 13 protrudes from the upper surface of the calibrating die 10, the oil cylinder stops running, and the machine tool chuck picks up the bearing ring 13, completing one work cycle.
[0021] The parts of this utility model not described in detail are existing technologies.
[0022] The embodiments selected herein for the purpose of disclosing the inventive objectives of this utility model are currently considered appropriate; however, it should be understood that this utility model is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and utility model.
Claims
1. A tooling for shaping the outer diameter of a bearing ring forging, comprising an upper template, a lower template, a crossbeam, a tie rod, a bearing ring, and a push rod, characterized in that: The upper template and crossbeam are spaced apart and fixedly connected by tie rods on both sides. The lower template is fixed to the machining bed, and its two sides are respectively threaded through the tie rods on both sides. A lower mold base is fixed in the middle of the upper part of the lower template. A sizing assembly is provided in the mold cavity of the lower mold base. A sizing pad is provided on the bottom surface of the cavity of the sizing assembly. The bearing ring is located on the top of the sizing pad. The lower end of the push rod passes through the sizing assembly, the lower mold base, and the lower template in sequence. A front and rear adjustment plate is fixed below the upper template. An upper die base is fixed below, and the upper and lower die bases are arranged correspondingly. A sizing rod is provided in the cavity below the upper die base. The sizing rod is stepped, with a larger diameter at the top and a smaller diameter at the bottom. The larger diameter section of the sizing rod is located inside the cavity of the upper die base, and the smaller diameter section is fitted with an upper die base cover and fixedly connected to the upper die base. The convex circle at the bottom of the sizing rod is set in the upper recess of the sizing punch. The bolt at the center of the sizing punch is fixedly connected to the sizing rod. The lower end of the sizing punch is pressed against the upper bearing ring.
2. The outer diameter forming fixture for bearing ring forgings according to claim 1, characterized in that: The lower mold base is designed with a U-shaped structure. Bolt holes are provided on the lower extension surfaces on both sides of the lower mold base. The lower mold base is fixed to the lower template by bolts in the bolt holes.
3. The outer diameter forming fixture for bearing ring forgings according to claim 1, characterized in that: The sizing assembly includes a die washer, a sizing die, and a lower die holder cap. The lower die holder cap is fixed to the upper part of the lower die holder with bolts. The sizing die and die washer are arranged sequentially from top to bottom in the die cavity of the lower die holder. The inner ring surface of the lower die holder cap and the upper part of the outer ring surface of the sizing die are conical. The lower die holder cap presses the sizing die into the die cavity through the conical surface. The inner ring surface of the sizing die is set as an inverted conical annular surface with a taper value of 3-4 degrees. The lower end of the sizing punch is located inside the sizing die, and the stepped surface is matched with the upper end surface of the sizing die. The cavity of the die washer is set as a stepped hole. The sizing lower washer is located on the first step. The upper end of the ejector pin is provided with an expansion section, which is located on the second step of the stepped hole, and the upper end surface of the expansion section is in contact with the lower surface of the sizing lower washer.
4. The outer diameter forming fixture for bearing ring forgings according to claim 1, characterized in that: The upper mold base is convex in shape and is fixed to the front and rear adjustment plates with bolts. The front and rear adjustment plates are fixed to the upper template with bolts.
5. The outer diameter forming fixture for bearing ring forgings according to claim 1, characterized in that: The front and rear adjustment plates are provided with elongated holes at the four corners. The upper mold base is adjusted to maintain the concentricity with the lower mold base by bolts in the elongated holes.