A positioning device and method for carburizing heat treatment of inner and outer rings of a tapered roller bearing

Abstract

The application belongs to the technical field of vacuum carburizing of inner and outer rings of tapered roller bearings, and particularly relates to a positioning device and method for carburizing heat treatment of inner and outer rings of tapered roller bearings. The positioning device for carburizing heat treatment of inner and outer rings of tapered roller bearings is a frustoconical cylinder, which comprises a cylinder body, and the two ends of the cylinder body are respectively provided with positioning ring one and positioning ring two. The cylinder body is provided with an opening which penetrates through the positioning ring one and the positioning ring two. In a normal state, the specification of the frustoconical cylinder is the same as that of the rollers in the inner ring of the tapered roller bearing. The application has the advantages and positive effects that after positioning, the frustoconical cylinder is clamped in the raceway, and the inner and outer rings of the tapered roller bearing are fixed relative to the frustoconical cylinder, so that the surface contact of the inner and outer rings of the bearing in the vacuum carburizing furnace under the action of airflow is avoided, thereby affecting carburizing. The specification of the frustoconical cylinder is the same as that of the rollers, and the frustoconical cylinder can be elastically deformed, so that it can smoothly enter the raceway. After entering the raceway, the frustoconical cylinder rebounds to position the inner and outer rings.

Description

Technical Field

[0001] This invention belongs to the field of vacuum carburizing technology for inner and outer rings of tapered roller bearings, specifically relating to a positioning device and method for carburizing heat treatment of inner and outer rings of tapered roller bearings. Background Technology

[0002] The tunneling machine cutter mounting structure includes: cutter flange, mounting base, cutter shaft, tapered roller bearing, and hob body. During the production of tapered roller bearings for cutters, the inner and outer rings of the bearings require vacuum carburizing. To fully utilize the space inside the vacuum carburizing furnace and improve carburizing efficiency, the inner and outer rings of the bearing are typically placed in the furnace simultaneously for heat treatment, with the inner ring inside the outer ring. Because high-pressure acetylene and nitrogen are introduced into the vacuum carburizing furnace during the process, the outer and inner rings of the bearing inside the furnace may come into surface contact under the influence of the airflow, thus affecting carburizing. Summary of the Invention

[0003] This invention addresses the problem that the outer and inner rings of bearings in a vacuum carburizing furnace may come into surface contact under the action of airflow, thus affecting carburizing. It provides a positioning device and method for the carburizing heat treatment of the inner and outer rings of tapered roller bearings.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a positioning device for the inner and outer rings of a tapered roller bearing after carburizing heat treatment. The positioning device is a frustoconical cylinder, which includes a cylinder body. The two ends of the cylinder body are a positioning ring one and a positioning ring two, respectively. The diameter of the positioning ring one is smaller than the diameter of the positioning ring two. The cylinder body has a notch that passes through the positioning ring one and the positioning ring two. Under normal conditions, the specifications of the frustoconical cylinder are the same as the specifications of the rollers inside the tapered roller bearing. In use, the frustoconical cylinder is inserted into the raceway between the outer and inner rings of the tapered roller bearing to achieve positioning of the inner and outer rings.

[0005] Preferably, the end face of the second positioning ring away from the first positioning ring is symmetrically and fixedly connected with two adjusting claws; by squeezing the two adjusting claws, the frustum-shaped cylinder can undergo elastic deformation and the notch can be reduced.

[0006] Preferably, the cylinder includes multiple side plates, which are fixedly connected between positioning ring one and positioning ring two, with gaps between adjacent side plates.

[0007] A method for positioning the inner and outer rings of a tapered roller bearing after carburizing heat treatment, comprising the following steps: (The method utilizes the aforementioned positioning device for the carburizing heat treatment of the inner and outer rings of the tapered roller bearing to position the inner and outer rings of the bearing before heat treatment.)

[0008] Step 1: Machining the first raceway surface on the inner circumference of the outer ring of a tapered roller bearing; Machining the second raceway surface on the outer circumference of the inner ring of a tapered roller bearing.

[0009] Step 2: The outer ring and inner ring of the tapered roller bearing are fitted together, and the raceway is formed between the first raceway surface of the outer ring and the second raceway surface of the inner ring.

[0010] Step 3: The operator squeezes the two adjusting claws with their hands to make the frustum-shaped cylinder elastically deform and the notch smaller. Then, one frustum-shaped cylinder is placed into the raceway, and the rebound of the frustum-shaped cylinder positions the inner and outer rings of the tapered roller bearing.

[0011] Preferably, the inner and outer rings of the tapered roller bearing, after being positioned in step three, are placed in a vacuum carburizing furnace for heating and carburizing treatment. After the treatment, the inner and outer rings of the tapered roller bearing are removed, and after cooling, the operator squeezes the two adjusting claws by hand to make the frustum-shaped cylinder elastically deform and the notch smaller. Then, the frustum-shaped cylinder is moved out of the raceway to obtain the heat-treated inner and outer rings of the tapered roller bearing.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0013] (1) The inner and outer rings of the tapered roller bearing are positioned by the carburizing heat treatment positioning device. After positioning, the frustum-shaped cylinder is stuck in the raceway. The inner and outer rings of the tapered roller bearing are fixed relative to the frustum-shaped cylinder, which avoids the outer and inner rings of the bearing in the vacuum carburizing furnace from making surface contact under the action of airflow, thus affecting carburizing.

[0014] (2) The positioning device for the carburizing heat treatment of the inner and outer rings of the tapered roller bearing is a frustum-shaped cylinder with the same specifications as the roller and capable of elastic deformation, so that the frustum-shaped cylinder can smoothly enter the raceway. After entering the raceway, the frustum-shaped cylinder springs back to position the inner and outer rings of the tapered roller bearing.

[0015] (3) There is a gap between the adjacent side plates of the frustum-shaped cylinder. After positioning, the frustum-shaped cylinder is stuck in the raceway, and the cylinder is in contact with the raceway line. The effect on the carburizing process can be ignored. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below:

[0017] Figure 1 A schematic diagram showing the usage status of the positioning device for the carburizing heat treatment of the inner and outer rings of a tapered roller bearing;

[0018] Figure 2 A three-dimensional sectional view of a tapered roller bearing;

[0019] Figure 3 Three-dimensional positioning device for carburizing heat treatment of inner and outer rings of tapered roller bearings Figure 1 ;

[0020] Figure 4 A bottom view of the positioning device for the carburizing heat treatment of the inner and outer rings of a tapered roller bearing;

[0021] Figure 5 Three-dimensional positioning device for carburizing heat treatment of inner and outer rings of tapered roller bearings Figure 2 .

[0022] Explanation of reference numerals in the attached figures:

[0023] 1—Outer ring, 2—Inner ring;

[0024] 3—Positioning device for carburizing heat treatment of inner and outer rings of tapered roller bearing; 31—Positioning ring one; 32—Positioning ring two; 33—Adjusting pawl; 34—Notch;

[0025] 4—Race track, 5—Roller, 6—Cage. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0028] Example 1

[0029] The following is in conjunction with the appendix Figures 1-5 To further describe the present invention, a positioning device for the carburizing heat treatment of the inner and outer rings of a tapered roller bearing, such as... Figures 3-5 As shown, the positioning device 3 for the carburizing heat treatment of the inner and outer rings of the tapered roller bearing is a frustoconical cylinder. The frustoconical cylinder includes a cylinder body, with positioning ring 31 and positioning ring 32 at its two ends, respectively. The diameter of positioning ring 31 is smaller than the diameter of positioning ring 32. The cylinder body has a notch 34 that passes through positioning ring 31 and positioning ring 32. Under normal conditions, the specifications of the frustoconical cylinder are consistent with those of the rollers 5 inside the tapered roller bearing (e.g., ...). Figure 2 The specifications are the same as those shown. In use, the frustoconical cylinder is locked in the raceway 4 between the outer ring 1 and the inner ring 2 of the tapered roller bearing, thereby positioning the inner ring 2 and the outer ring 1.

[0030] Figure 2 The middle cage 6 serves to separate and guide the multiple rollers 5.

[0031] like Figure 3As shown, the end face of positioning ring 2 32 away from positioning ring 1 31 is symmetrically and fixedly connected with two adjusting claws 33; by squeezing the two adjusting claws 33, the frustum-shaped cylinder can be elastically deformed and the notch 34 can be reduced.

[0032] like Figure 5 As shown, the cylinder includes multiple side plates, which are fixedly connected between positioning ring 31 and positioning ring 32, with gaps between adjacent side plates.

[0033] A method for positioning the inner and outer rings of a tapered roller bearing after carburizing heat treatment, comprising the following steps: The method utilizes the aforementioned positioning device for the inner and outer rings of the tapered roller bearing before heat treatment to position the inner ring 2 and outer ring 1 of the bearing.

[0034] Step 1: The inner circumference of the outer ring 1 of the tapered roller bearing is machined to complete the first raceway surface, and the outer circumference of the inner ring 2 of the tapered roller bearing is machined to complete the second raceway surface.

[0035] Step 2: The outer ring 1 and inner ring 2 of the tapered roller bearing are fitted together. The raceway 4 is located between the first raceway surface of the outer ring 1 and the second raceway surface of the inner ring 2 (e.g., ...). Figure 1 (as shown);

[0036] Step 3: The operator squeezes the two adjusting claws 33 by hand, causing the frustum-shaped cylinder to elastically deform and the notch 34 to shrink. Then, one frustum-shaped cylinder is placed into the raceway 4. The frustum-shaped cylinder springs back to position the inner ring 2 and outer ring 1 of the tapered roller bearing (e.g., Figure 1 (As shown). After positioning, the frustoconical cylinder is locked inside the raceway 4, and both the inner ring 2 and outer ring 1 of the tapered roller bearing are fixed relative to the frustoconical cylinder.

[0037] The inner ring 2 and outer ring 1 of the tapered roller bearing, positioned in step three, are placed in a vacuum carburizing furnace for heating and carburizing treatment. After the treatment, the inner ring 2 and outer ring 1 of the tapered roller bearing are removed. After cooling, the operator squeezes the two adjusting claws 33 by hand to make the frustum-shaped cylinder elastically deform and the notch 34 smaller. Then the frustum-shaped cylinder is moved out of the raceway 4 to obtain the heat-treated inner ring 2 and outer ring 1 of the tapered roller bearing.

[0038] Example 2

[0039] The difference between this embodiment and Embodiment 1 is that the positioning method for the inner and outer rings of the tapered roller bearing after carburizing heat treatment also includes step four, in which two more frustoconical cylinders are placed into the raceway 4, that is, a total of three frustoconical cylinders are placed into the raceway 4, and the three frustoconical cylinders are evenly distributed in the raceway 4 to achieve better positioning of the inner ring 2 and outer ring 1 of the tapered roller bearing.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A positioning device for the carburizing heat treatment of inner and outer rings of a tapered roller bearing, characterized in that, The positioning device (3) for the inner and outer rings of the tapered roller bearing after carburizing heat treatment is a frustoconical cylinder. The frustoconical cylinder includes a cylinder body, and the two ends of the cylinder body are positioning ring one (31) and positioning ring two (32) respectively. The diameter of positioning ring one (31) is smaller than the diameter of positioning ring two (32). The cylinder body has a notch (34) that passes through positioning ring one (31) and positioning ring two (32). Under normal conditions, the specifications of the frustoconical cylinder are the same as the specifications of the rollers (5) inside the tapered roller bearing. When in use, the frustoconical cylinder is stuck in the raceway (4) between the outer ring (1) and the inner ring (2) of the tapered roller bearing to achieve positioning of the inner ring (2) and the outer ring (1). The cylinder includes multiple side plates, which are fixedly connected between positioning ring one (31) and positioning ring two (32), with gaps between adjacent side plates.

2. The positioning device for carburizing heat treatment of inner and outer rings of tapered roller bearings according to claim 1, characterized in that... The end face of the second positioning ring (32) away from the first positioning ring (31) is symmetrically and fixedly connected with two adjusting claws (33); by pinching the two adjusting claws (33), the frustum-shaped cylinder can be elastically deformed and the notch (34) can be reduced.

3. A method for positioning the inner and outer rings of a tapered roller bearing through carburizing heat treatment, characterized in that... The positioning device for the inner and outer rings of the tapered roller bearing before heat treatment, as described in claim 2, is used to position the inner ring (2) and outer ring (1) of the tapered roller bearing before heat treatment, comprising the following steps: Step 1: The inner circumference of the outer ring (1) of a pair of tapered roller bearings is machined to complete the first raceway surface, and the outer circumference of the inner ring (2) of the tapered roller bearings is machined to complete the second raceway surface. Step 2: The outer ring (1) and inner ring (2) of the tapered roller bearing are fitted together, and the raceway (4) is formed between the first raceway surface of the outer ring (1) and the second raceway surface of the inner ring (2). Step 3: The operator pinches the two adjusting claws (33) with his hand to make the frustum-shaped cylinder elastically deform and the notch (34) smaller. Then, a frustum-shaped cylinder is placed into the raceway (4). The frustum-shaped cylinder springs back to position the inner ring (2) and outer ring (1) of the tapered roller bearing.

4. The method for positioning the inner and outer rings of a tapered roller bearing by carburizing heat treatment according to claim 3, characterized in that, The inner ring (2) and outer ring (1) of the tapered roller bearing after positioning in step three are placed in a vacuum carburizing furnace for heating and carburizing treatment. After the treatment is completed, the inner ring (2) and outer ring (1) of the tapered roller bearing after positioning are taken out. After cooling, the operator squeezes the two adjusting claws (33) by hand to make the frustum-shaped cylinder elastically deform and the notch (34) smaller. Then the frustum-shaped cylinder is moved out of the raceway (4) to obtain the heat-treated inner ring (2) and outer ring (1) of the tapered roller bearing.

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