Quenching pressing die with cambered surface structure and pressing die assembly

Abstract

The quenching pressing die is composed of a circular truncated cone part and a cone part, a plurality of oil passing holes are evenly distributed in the middle of the end face of the circular truncated cone part in the circumferential direction, a plurality of first oil flowing grooves are evenly distributed in the edge of the end face of the circular truncated cone part in the circumferential direction, and the cone part is provided with an arc-shaped peripheral face. A plurality of second oil flowing grooves are uniformly distributed in the peripheral surface of the bearing ring in the circumferential direction, and the first oil flowing grooves and the second oil flowing grooves are in one-to-one correspondence, so that the bearing ring is fully cooled during quenching; a cone part of the quenching pressing die is sleeved on the inner surface of a to-be-quenched ferrule, the to-be-quenched ferrule is pressed on the positioning die through a circular truncated cone part, the positioning die is a circular truncated cone with an inner hole, and a plurality of third oil flowing grooves are uniformly distributed on the end surface of the circular truncated cone along the circumferential direction; the third oil flowing grooves are in one-to-one correspondence with the first oil flowing grooves and the second oil flowing grooves, sufficient flowing of quenching oil is guaranteed, and the positioning die is used for guaranteeing the positioning effect during pressing die quenching.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment of bearing parts, in particular to a quenching die and a die assembly with a cambered surface structure. Background Art

[0002] It is known that when carburizing steel bearing rings are processed by die quenching, the inner surface of the die is supported to control the deformation and dimensional expansion and contraction of the rings after secondary quenching.

[0003] The working surface of the existing bearing ring quenching die (i.e., the part that supports the inner surface of the ring) is an integral cylindrical or conical structure. During quenching, the quenching oil does not flow smoothly, which cannot guarantee the cooling effect of the workpiece to be processed. In addition, the quenching die with this structure cannot meet the support requirements of the bearing ring with an arc structure with a certain curvature on the inner surface. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the present utility model is to provide a quenching die and a die assembly with a curved surface structure.

[0005] The technical solution adopted by the utility model is: a quenching die with an arc surface structure, the quenching die consists of a frustum portion and a cone portion, a plurality of oil holes are evenly distributed along the circumferential direction on the middle part of the end face of the frustum portion, a plurality of first oil flow grooves are evenly distributed along the circumferential direction on the edge of the end face of the frustum portion, the cone portion has an arc-shaped outer peripheral surface, a plurality of second oil flow grooves are evenly distributed on its outer peripheral surface along the circumferential direction, and the first oil flow grooves and the second oil flow grooves correspond to each other one by one.

[0006] As a preferred solution, the outer peripheral surface of the cone portion is the working surface of the die, and the arc curvature of the working surface is the same as the arc curvature of the inner surface of the bearing ring to be quenched.

[0007] As a preferred solution, the second oil flow groove is a square groove that passes through the entire working surface of the die from top to bottom.

[0008] As a preferred solution, the cone portion is further provided with an inner hole for oil passage and weight reduction.

[0009] As a preferred solution, the truncated cone portion is further provided with a threaded hole for mounting a connecting rod at the center of one end surface of the oil hole.

[0010] This solution also includes a die assembly, which has the quenching die mentioned above, a connecting rod and a positioning die. One end of the connecting rod is connected to the quenching press, and the other end is connected to the quenching die. The conical part of the quenching die is mounted on the inner surface of the ring to be quenched, and the ring to be quenched is pressed against the positioning die through the frustum.

[0011] As a preferred solution, one end of the connecting rod is provided with a threaded section, and the threaded section is fitted into the threaded hole on the end surface of the truncated cone portion.

[0012] As a preferred solution, the positioning die is a truncated cone with an inner hole, and a plurality of third oil flow grooves are evenly distributed along the circumferential direction on the end surface of the truncated cone.

[0013] As a preferred solution, the third oil flow groove corresponds one-to-one to the first oil flow groove and the second oil flow groove.

[0014] The beneficial effects of the utility model are:

[0015] Based on the defects of the existing technology, this solution provides a quenching die with a curved surface structure. Through optimized structural design, the quenching die consists of a frustum and a cone. The middle part of the end surface of the frustum is evenly distributed with a number of oil holes along the circumference. The edge of the end surface of the frustum is evenly distributed with a number of first oil flow grooves along the circumferential direction. The cone has an arc-shaped outer surface, and a number of second oil flow grooves are evenly distributed on its outer surface along the circumferential direction. The first oil flow grooves and the second oil flow grooves cooperate with each other to pass through the entire working surface of the die, ensuring that the bearing ring is fully cooled during quenching.

[0016] Furthermore, the curved surface on the outside of the cone serves as the working surface of the die. This curved surface perfectly matches the curved surface structure of the inner surface of the ring, providing support for the inner surface of the ring. During the press quenching process, the die and the positioning die work together, with the two end faces of the ring being clamped by the die and the positioning die end faces, respectively. By supporting and clamping these parts, the deformation and dimensional expansion and contraction of this type of bearing ring after quenching are controlled.

[0017] Furthermore, the present solution also includes a die assembly, which consists of the above-mentioned quenching die, connecting rod and positioning die. The conical part of the quenching die is mounted on the inner surface of the ring to be quenched, and the ring to be quenched is pressed against the positioning die through the frustum part. The positioning die is a frustum with an inner hole, and a number of third oil flow grooves are evenly distributed along the circumferential direction on the end face of the frustum. The third oil flow grooves correspond one-to-one to the first oil flow grooves and the second oil flow grooves to ensure sufficient flow of quenching oil. The positioning die is used to ensure the positioning effect of the die during quenching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1This is a structural diagram of the die assembly of the present invention;

[0020] Figure 2 It is a structural cross-sectional view of the quenching die;

[0021] Figure 3 It is a top view of the quenching die;

[0022] Figure 4 This is a top view of the positioning mold.

[0023] Reference numerals: 1. connecting rod; 2. quenching die; 21. frustum; 211. first oil flow groove; 212. oil hole; 213. threaded hole; 22. conical portion; 221. second oil flow groove; 222. inner hole; 3. bearing ring; 4. positioning die; 41. third oil flow groove. DETAILED DESCRIPTION

[0024] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may also be beneficially combined in other embodiments.

[0025] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons having ordinary skills in the field to which the present invention belongs; the words “one”, “an” or “the” and the like used in the description and claims of the present utility model patent application do not express quantitative limitations, but indicate the presence of at least one; the words “include” or “comprise” and the like indicate that the elements or objects appearing before “include” or “comprise” include the elements or objects listed after “include” or “comprise” and their equivalents, but do not exclude other elements or objects with the same function;

[0026] In order to more clearly describe the specific structural composition and quenching process of the die assembly, Figure 1-4 Describe this embodiment in detail:

[0027] like Figure 1 As shown, a die assembly consists of a quenching die 2, a connecting rod 1 and a positioning die 4. The positioning die 4 is used to ensure the positioning effect of the die during quenching. One end of the connecting rod 1 is connected to the quenching press, and the other end is connected to the quenching die 2. The conical part of the quenching die 2 is mounted on the inner surface of the ring to be quenched, and the bearing ring 3 to be quenched is pressed against the positioning die 4 through the frustum. In this scheme, the die is connected to the quenching press through the connecting rod. During quenching, the arc-shaped inner surface of the bearing ring is supported by the outer peripheral surface of the quenching die. The quenching die and the positioning die are used in conjunction with each other to ultimately achieve control of product size and expansion and contraction.

[0028] In this embodiment, a threaded section is provided at one end of the connecting rod 1 , and the threaded section is fitted into a threaded hole on the end surface of the frustum of the quenching die 2 .

[0029] like Figure 2-3 As shown, a quenching die with an arc surface structure is shown, the quenching die 2 is composed of a frustum portion 21 and a cone portion 22, the frustum portion 21 and the cone portion 22 are formed into an integral structure to form the quenching die 2, a plurality of oil holes 212 are evenly distributed in the circumferential direction in the middle area of ​​the end face of the frustum portion 21, a plurality of first oil flow grooves 211 are evenly distributed in the circumferential direction in the edge area of ​​the end face of the frustum portion 21, the cone portion 22 has an arc-shaped outer peripheral surface, the outer peripheral surface of the cone portion is the working surface of the die, the arc curvature SR of the working surface is the same as the arc curvature of the inner surface of the bearing ring 3 to be quenched, so as to ensure that the arc surface of the ring after the die is set is completely consistent with the arc surface of the die, a plurality of second oil flow grooves 221 are evenly distributed in the circumferential direction on the outer peripheral surface of the cone portion 22, the first oil flow grooves 211 and the second oil flow grooves 221 correspond one to one to ensure that the bearing ring is fully cooled during quenching;

[0030] The quenching die structure described in this scheme is suitable for bearing rings with an arc-shaped structure whose inner surface has a certain curvature. It can effectively control the deformation and size of such bearing rings after secondary quenching and tempering, ensuring that the deformation and expansion and contraction can meet the dimensional requirements of the product after grinding.

[0031] In this embodiment, the second oil flow groove 221 is a square groove that passes through the entire working surface of the quenching die 2 from top to bottom, so that the working surface and the bearing ring are fully cooled during the cooperation process.

[0032] In this embodiment, the cone portion 22 is further provided with an inner hole 222 for oil passage and weight reduction, and the inner hole 222 is communicated with the oil passage hole 212 in the middle area of ​​the end surface of the frustum portion 21 .

[0033] In this embodiment, the truncated cone portion 21 is further provided with a threaded hole 213 for mounting the connecting rod 1 at the center of one end surface of the oil hole 212 .

[0034] In this embodiment, the distance between the lower end surface of the frustum portion 21 of the quenching die and the end surface of the cone portion is equivalent to the height of the bearing ring to be quenched; the diameter of the arc opening of the cone portion is related to the outer and inner diameter dimensions of the large end surface of the bearing ring.

[0035] In this embodiment, Figure 4 As shown, the positioning mold 4 is a truncated cone with an inner hole, and a plurality of third oil flow grooves 41 are evenly distributed along the circumferential direction on the end face of the truncated cone for supporting the bearing ring 3. The third oil flow grooves 41 correspond one-to-one to the first oil flow grooves 211 and the second oil flow grooves 221 to ensure sufficient flow of the quenching oil.

[0036] When the device is implemented, the quenching process is as follows:

[0037] When in use, the truncated cone portion 21 of the quenching die 2 is facing upwards and connected to the quenching press through the connecting rod 1, and one end of the conical portion 22 with the arc surface of the quenching die 2 is facing downwards. The large end face of the heated bearing ring 3 is placed downwards against the end face of the positioning die 4, and the small end face is placed against the lower end face of the truncated cone portion 21, and is sleeved on the outside of the conical portion 22 of the quenching die to fit together;

[0038] After adjusting the positions of the quenching die 2 and the positioning die 4 and keeping the center positions aligned, quenching oil can be added to carry out press quenching.

[0039] The parts not described in detail in the above embodiments are prior art.

[0040] It should be noted that although the present invention has been described through the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A quenching die with a curved surface structure, characterized in that: The quenching die consists of a frustum and a cone. A number of oil holes are evenly distributed along the circumferential direction in the middle of the end face of the frustum, and a number of first oil flow grooves are evenly distributed along the circumferential direction on the edge of the end face of the frustum. The cone has an arc-shaped outer surface, and a number of second oil flow grooves are evenly distributed on its outer surface along the circumferential direction. The first oil flow grooves and the second oil flow grooves correspond to each other one by one.

2. The quenching die with a curved surface structure according to claim 1, characterized in that: The outer peripheral surface of the cone portion is the working surface of the die, and the arc curvature of the working surface is the same as the arc curvature of the inner surface of the bearing ring to be quenched.

3. The quenching die with a curved surface structure according to claim 2, characterized in that: The second oil flow groove is a square groove and passes through the entire working surface of the die from top to bottom.

4. The quenching die with a curved surface structure according to claim 1, characterized in that: The cone portion is also provided with an inner hole for oil passage and weight reduction.

5. The quenching die with a curved surface structure according to claim 1, characterized in that: The truncated cone portion is located at the center of one end surface of the oil hole and is further provided with a threaded hole for installing a connecting rod.

6. A die assembly, characterized in that: It comprises the quenching die as described in any one of claims 1 to 5, a connecting rod and a positioning die, one end of the connecting rod is connected to the quenching press, and the other end is connected to the quenching die, the conical part of the quenching die is sleeved on the inner surface of the ring to be quenched, and the ring to be quenched is pressed against the positioning die through the frustum.

7. A die assembly according to claim 6, characterized in that: One end of the connecting rod is provided with a threaded section, and the threaded section is fitted into the threaded hole on the end surface of the truncated cone portion.

8. A die assembly according to claim 6, characterized in that: The positioning die is a truncated cone with an inner hole, and a plurality of third oil flow grooves are evenly distributed along the circumferential direction on the end surface of the truncated cone.

9. A die assembly according to claim 8, characterized in that: The third oil flow groove corresponds one-to-one to the first oil flow groove and the second oil flow groove.

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