Quenching deformation control device for bearing ring
By setting upper and lower dies with conical grooves on the press to limit the deformation of the bearing ring, the problem of large deformation of the bearing ring during bainite quenching is solved, and the dimensional stability and cooling effect are improved.
Patent Information
- Application Number
- CN202422563450.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In the prior art, bearing rings deform greatly during bainite quenching, especially thin-walled bearing rings. Moreover, it is difficult to control the size expansion after quenching using an internal support die, resulting in poor shaping effect.
A bearing ring quenching deformation control device is used, which includes a first and a second lifting device on a press. The upper die and the lower die are respectively provided with a conical sink groove. The inner conical surface of the conical sink groove limits the deformation of the outer surface of the workpiece, and a through hole is provided to facilitate the flow and cooling of the quenching medium.
Effectively control the deformation of bearing rings after bainite quenching, ensure dimensional consistency and stability, good cooling effect and easy demoulding.
Smart Images
Figure CN223386190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing heat treatment, in particular to a bearing ring quenching deformation control device. Background Art
[0002] Currently, bearing rings are being subjected to a large number of bainite quenching processes worldwide. When free quenching is used, deformation after quenching is significant, especially for thin-walled bearing rings. Currently, the main methods for controlling quenching deformation of bearing rings are: first, quenching carburized steel bearing rings with internal support dies; second, quenching a small number of thin-walled high-carbon steel bearing rings with internal support dies; and third, shaping a large number of high-carbon steel bearing rings after quenching.
[0003] However, when the existing bearing rings are quenched with bainite, their size increases, making it impossible to use an internal support die for quenching. Bainite has high toughness after quenching, and shaping after quenching is difficult and has poor results. Utility Model Content
[0004] In response to the problems existing in the prior art, the utility model provides a bearing ring quenching deformation control device, which can effectively control the quenching deformation of the bearing ring bainite during the quenching process, thereby ensuring that the deformation of the bearing ring bainite after quenching is small, the size consistency and stability are good.
[0005] The utility model adopts the following technical solution to solve the above technical problems: a bearing ring quenching deformation control device, comprising a press, a first lifting device and a second lifting device are relatively provided on the upper edge of the press in a vertical direction, an upper die and a lower die are respectively provided on the first lifting device and the second lifting device, the upper die and the lower die are relatively arranged, and conical grooves are respectively provided on the opposite surfaces of the upper die and the lower die, and the large ends of the two conical grooves are relatively arranged.
[0006] As a preferred solution, the upper die and the lower die have the same structure and size.
[0007] As a preferred solution, the first lifting device includes a first lifting cylinder, an upper screw is provided at the end of the piston rod of the first lifting cylinder, and an upper threaded hole matching the upper screw is provided on the upper die.
[0008] As a preferred solution, the second lifting device includes a second lifting cylinder, a lower screw is provided at the end of the piston rod of the second lifting cylinder, and a lower threaded hole matching the lower screw is provided on the lower die.
[0009] As a preferred solution, the inner wall of the conical sink is provided with a plurality of inclined grooves along the circumferential direction.
[0010] As a preferred solution, an upper through hole penetrating the upper die is provided at the bottom of the conical sink groove of the upper die.
[0011] As a preferred solution, a lower through hole penetrating the lower die is provided at the bottom of the conical sink groove of the lower die.
[0012] As a preferred solution, the conical sink has an inner conical surface, and the angle between the inner conical surface and its axis is 25°-75°.
[0013] The beneficial effects of the present application are: 1. After the workpiece is heated, the workpiece is placed on the inner conical surface of the conical sink groove of the lower die. The first lifting device drives the upper die close to the lower die and presses the workpiece. The inner conical surfaces of the two conical sink grooves jointly limit the deformation of the outer surface of the workpiece, thereby effectively controlling the expansion and deformation of the outer surface of the workpiece.
[0014] 2. The present application is provided with upper and lower through holes, which, on the one hand, play a role in reducing weight, and on the other hand, facilitate the passage of quenching medium, making cooling more sufficient.
[0015] 3. The inner wall of the present application is provided with multiple inclined grooves, which are conducive to the flow of quenching medium and have a better cooling effect. The angle between the inner cone and its axis is 25°-75°, so that a reasonable shrinkage force can be generated during the pressing process of the die, and the die can be smoothly demoulded after the pressing process is completed, so that the product will not be stuck and cannot be demoulded. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of the utility model;
[0017] Figure 2 Schematic diagram of the structure of the upper die;
[0018] Figure 3 for Figure 2 Bottom view of .
[0019] Markings in the figure: 1, first lifting cylinder, 2, upper die, 3, workpiece, 4, lower die, 5, second lifting cylinder, 6, conical sink, 61, inner cone, 7, inclined groove. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] See also Figure 1-3 An embodiment of the utility model provides a bearing ring quenching deformation control device, including a press, on which a first lifting device and a second lifting device are relatively provided in the vertical direction. An upper die 2 and a lower die 4 are respectively provided on the first lifting device and the second lifting device. The upper die 2 and the lower die 4 are arranged opposite to each other, and conical grooves 6 are respectively provided on the opposite surfaces of the upper die 2 and the lower die 4, and the large ends of the two conical grooves 6 are arranged opposite to each other.
[0022] The conical sink 6 has a large end and a small end, and the upper die 2 and the lower die 4 have the same structure and size. The first lifting device includes a first lifting cylinder 1, the piston rod end of which is provided with an upper screw, and the upper die 2 is provided with an upper threaded hole that cooperates with the upper screw.
[0023] Specifically, the second lifting device includes a second lifting cylinder 5 , a lower screw is provided at the end of the piston rod of the second lifting cylinder 5 , and a lower threaded hole matching the lower screw is provided on the lower die 4 .
[0024] More specifically, the inner wall of the conical groove 6 is provided with a plurality of inclined grooves 7 along the circumferential direction, and the bottom of the conical groove 6 of the upper die 2 is provided with an upper through hole penetrating the upper die 2. The bottom of the conical groove 6 of the lower die 4 is provided with a lower through hole penetrating the lower die 4.
[0025] In addition, the conical sink 6 has an inner conical surface 61, and the angle between the inner conical surface 61 and its axis is 25°-75°, so that a reasonable shrinkage force can be generated during the pressing process of the die, and the die can be smoothly demolded after the pressing process is completed, so that the product will not be stuck and cannot be demolded.
[0026] When the present application is used, after the workpiece 3 is heated, the workpiece 3 is placed on the inner conical surface 61 of the conical sink groove 6 of the lower die 4. The first lifting device drives the upper die close to the lower die 4 and presses the workpiece 3. The inner conical surfaces 61 of the two conical sink grooves 6 jointly limit the deformation of the outer surface of the workpiece 3, thereby effectively controlling the expansion and deformation of the outer surface of the workpiece 3.
[0027] In addition, taking the tapered bearing ring as an example, the outer diameter of the tapered bearing ring is 787 mm, the height is 70 mm, the effective wall thickness is 16.9 mm, and the angle between the inner conical surface 61 and its axis is 45°. The tapered bearing ring is placed on the inner conical surface 61 of the conical groove 6 of the lower die 4, with the small end of the tapered bearing ring facing downward. The first lifting cylinder 1 drives the upper die 2 to press downward. The inner conical surface 61 is defined as the pressing touch bevel. The pressing touch bevel contacts the outer diameter chamfer of the wide end face of the tapered bearing ring. During the downward pressing process of the die, the outer diameter surface is subjected to a certain contraction force under the continuous action of external force, which controls the expansion and deformation of the outer surface of the tapered bearing ring.
[0028] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.
Claims
1. A bearing ring quenching deformation control device, characterized in that: The invention comprises a press machine, wherein a first lifting device and a second lifting device are arranged opposite to each other in a vertical direction on the upper side of the press machine, an upper pressing die (2) and a lower pressing die (4) are respectively arranged on the first lifting device and the second lifting device, the upper pressing die (2) and the lower pressing die (4) are arranged opposite to each other, and conical sink grooves (6) are respectively arranged on the opposite surfaces of the upper pressing die (2) and the lower pressing die (4), and the large ends of the two conical sink grooves (6) are arranged opposite to each other.
2. A bearing ring quenching deformation control device according to claim 1, characterized in that: The upper die (2) and the lower die (4) have the same structure and size.
3. The bearing ring quenching deformation control device according to claim 2, characterized in that: The first lifting device comprises a first lifting oil cylinder (1), an upper screw is provided at the end of the piston rod of the first lifting oil cylinder (1), and an upper threaded hole matching the upper screw is provided on the upper pressing die (2).
4. The bearing ring quenching deformation control device according to claim 2, characterized in that: The second lifting device comprises a second lifting oil cylinder (5), a lower screw is provided at the end of the piston rod of the second lifting oil cylinder (5), and a lower threaded hole cooperating with the lower screw is provided on the lower pressing die (4).
5. The bearing ring quenching deformation control device according to claim 2, characterized in that: The inner wall of the conical sink (6) is provided with a plurality of inclined grooves (7) along the circumferential direction.
6. The bearing ring quenching deformation control device according to claim 2, characterized in that: An upper through hole penetrating the upper pressing die (2) is provided at the bottom of the conical sink groove (6) of the upper pressing die (2).
7. The bearing ring quenching deformation control device according to claim 2, characterized in that: The bottom of the conical sink groove (6) of the lower pressing die (4) is provided with a lower through hole penetrating the lower pressing die (4).
8. The bearing ring quenching deformation control device according to claim 1, characterized in that: The conical sink (6) has an inner conical surface (61), and the angle between the inner conical surface (61) and its axis is 25°-75°.