Machining tool for roller with large-size through hole

Abstract

The machining tool for the roller with the large-size through hole comprises two tips, the ends of the tips can extend into the through hole of the roller, the outer surfaces of the two tips are both provided with conical surfaces matched with inner conical holes of the through hole of the roller, and when the two tips are inserted into the through hole of the roller, the conical surfaces of the two tips are matched with the conical surfaces. The end part of one tip is inserted into the blind hole in the end part of the other tip in a clearance fit manner; the double-tip roller clamping device is reasonable in design structure and convenient to use, the requirement for clamping a large-size through hole roller on a lathe can be met by adopting a double-tip structure, logarithmic curve modification can be conveniently carried out on the outer diameter surface of the roller after clamping, the machining procedures of the roller can be reduced, the manufacturing period is shortened, the collision damage risk of the roller is reduced, and meanwhile the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller processing tooling, and in particular relates to a processing tooling for a roller with a large-size through hole. Background Art

[0002] Bearing rollers are key components in rolling bearings, and they play a vital role in the performance and life of bearings. There are many types of rollers, including cylindrical rollers, tapered rollers, spherical rollers, etc. Large cylindrical rollers are particularly suitable for heavy-load applications. Cylindrical rollers are usually in line contact or modified line contact with the raceway. This design gives cylindrical roller bearings a large radial load capacity. They are suitable for heavy loads and shock loads, and are also suitable for high-speed rotation. The friction between the rolling elements of cylindrical roller bearings and the ribs of the rings is low, which helps to reduce energy loss and improve the operating efficiency of the bearing.

[0003] In order to cope with increasingly complex mechanical working conditions, a cylindrical roller with a large through hole is designed in the prior art, such as Figure 3 As shown in the figure, this cylindrical roller not only has a through-hole structure inside, but also has different numbers of step structures at both ends of the through-hole. In addition, in order to solve the boundary stress concentration (edge ​​effect) problem at both ends of the rolling element of the straight generatrix roller after being loaded, in the above roller processing process, it is also necessary to use a logarithmic curve shaping method to shape the roller. Figure 3 The outer diameter surface a of the middle roller is processed by logarithmic curve shaping. Due to the complex structure of the roller, the process scheme in the prior art is: soft turning the outer diameter of one end of the roller + end face + drilling + boring → soft turning the outer diameter of the other end of the roller + end face + drilling + boring → heat treatment → rough grinding of the outer diameter → rough grinding of the end face → stress relief tempering → semi-finished grinding of the outer diameter → semi-finished grinding of the end face → fine grinding of the outer diameter → fine grinding of the end face → stress relief tempering → grinding of the end face → contour grinding of the outer diameter → super-finished grinding of the outer diameter. This process scheme is not only costly and has a long cycle, but also causes bumps and scratches to the product itself.

[0004] To this end, the inventor intends to use turning to perform contour modification on the outer diameter surface a of the roller. However, due to the small size of the inner hole of the roller, the chuck cannot be clamped, and the tool easily hits the chuck during the modification. The traditional clamping method cannot complete the contour modification of the outer diameter surface a. Therefore, a processing tool with a large-size through-hole roller is urgently needed to solve the above problems. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the utility model provides a processing tooling with a large-sized through-hole roller. The design structure is reasonable and easy to use. The double-center structure can meet the clamping requirements of the large-sized through-hole roller on the lathe, so as to facilitate the logarithmic curve shaping of the outer diameter surface of the roller after clamping, which can reduce the processing procedures of the roller, shorten the manufacturing cycle, reduce the risk of roller bumping and damage, and also reduce the cost.

[0006] The technical solution adopted by the utility model is: a processing tool with a large-sized through-hole roller, including two tips whose ends can extend into the roller through-hole, the outer surfaces of the two tips are provided with conical surfaces matching the tapered holes inside the roller through-hole, and when the two tips are inserted into the roller through-hole, the end of one of the tips is inserted into the blind hole of the end of the other tip in a clearance fit manner.

[0007] The two tops include a first top and a second top. A first top hole is opened at the center of the outer end surface of the first top, and a second top hole is opened at the center of the outer end surface of the second top.

[0008] The middle position of the outer surface of the first top has a first conical surface with the same taper as the inner tapered hole of the roller through hole, and the middle position of the outer surface of the second top has a second conical surface with the same taper as the inner tapered hole of the roller through hole.

[0009] The blind hole is opened at one end of the first top point away from the first top point hole, and the other end of the second top point is formed with a shaft head, the length of the shaft head is greater than the depth of the blind hole, and the outer diameter of the shaft head is clearance-matched with the inner diameter of the blind hole.

[0010] The beneficial effects of the utility model are:

[0011] The utility model has a reasonable design structure and is easy to use. The double-center structure can meet the needs of clamping large-size through-hole rollers on a lathe, so that the logarithmic curve shaping of the outer diameter surface of the roller can be performed after clamping. The processing steps of the roller can be reduced, the manufacturing cycle can be shortened, the risk of roller bumps and damages can be reduced, and the cost can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a diagram of the use state of the utility model;

[0014] Figure 3 Figure 2 is a structural diagram of a roller with a large through hole.

[0015] Markings in the figure: 1, first top point; 101, first top point hole; 102, first tapered surface; 103, blind hole; 2, second top point; 201, second top point hole; 202, second tapered surface; 203, shaft head; 3, tapered hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1-2 As shown, a processing tool with a large-sized through-hole roller includes two tips whose ends can extend into the roller through-hole, and the outer surfaces of the two tips are provided with conical surfaces matching the tapered holes 3 inside the roller through-hole. When the two tips are inserted into the roller through-hole, the end of one of the tips is inserted into the blind hole 103 of the end of the other tip in a clearance fit manner.

[0018] Specifically, the two centers include a first center 1 and a second center 2. A first center hole 101 is opened at the center position of the outer end face of the first center 1, and a second center hole 201 is opened at the center position of the outer end face of the second center 2. When processing the roller, the double centers on the machine tool can be placed at the first center hole 101 and the second center hole 201, so that the first center 1 and the second center 2 move toward each other to clamp the roller, which can avoid the problem that the outer diameter surface cannot be processed due to the roller end being too close to the chuck.

[0019] The middle position of the outer surface of the first tip 1 has a first tapered surface 102 with the same taper as the tapered hole 3 inside the roller through hole, and the middle position of the outer surface of the second tip 2 has a second tapered surface 202 with the same taper as the tapered hole 3 inside the roller through hole. The first tapered surface 102 and the second tapered surface 202 are used to contact the tapered hole 3 inside the roller respectively to avoid the roller from shaking, which is beneficial for the rotation center of the machine tool and the center line of the roller to coincide with each other.

[0020] The blind hole 103 is opened at one end of the first pin 1 away from the first pin hole 101, and a shaft head 203 is formed at the other end of the second pin 2. The length of the shaft head 203 is greater than the depth of the blind hole 103, and the outer diameter size of the shaft head 203 is clearance-matched with the inner diameter size of the blind hole 103. Such a setting can further ensure that the center lines of the first pin 1, the second pin 2 and the roller are on the same axis and coincide with the rotation center of the machine tool, so that when the roller rotates, the outer diameter runout meets the processing requirements and improves the roller processing accuracy.

[0021] When using this processing tooling for a roller with a large-sized through hole, the first center 1 and the second center 2 are respectively inserted into the roller from both sides of the roller through hole, and the shaft head 203 of the second center 2 is inserted into the blind hole 103 of the first center 1, and then the two centers of the machine tool are respectively inserted into the first center hole 101 and the second center hole 201. After the two centers are subjected to force, the roller can be clamped and positioned, and then the outer diameter surface a of the roller is subjected to logarithmic curve shaping by using a CNC lathe to complete the shaping process.

[0022] This process scheme uses double centers as tooling for roller processing. The entire roller process is: soft turning the outer diameter of one end of the roller + end face + drilling + boring → soft turning the outer diameter of the other end of the roller + end face + drilling + boring → heat treatment → hard turning the roller forming outer diameter + end face → super finishing grinding the outer diameter. Compared with the traditional process scheme, it has the advantages of low manufacturing cost, short process flow, short cycle, less product turnover, low risk of bumps and scratches, simple tooling design structure, etc., which greatly improves work efficiency.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A processing tool for a roller with a large through hole, characterized in that: It includes two tips whose ends can extend into the roller through hole. The outer surfaces of the two tips are provided with conical surfaces matching the tapered holes inside the roller through hole. When the two tips are inserted into the roller through hole, the end of one of the tips is inserted into the blind hole of the other tip end in a clearance fit manner.

2. The processing tooling for a roller with a large through hole according to claim 1 is characterized in that: The two tops include a first top and a second top. A first top hole is opened at the center of the outer end surface of the first top, and a second top hole is opened at the center of the outer end surface of the second top.

3. The processing tooling for a roller with a large through hole according to claim 2 is characterized in that: The middle position of the outer surface of the first top has a first conical surface with the same taper as the inner conical hole of the roller through hole, and the middle position of the outer surface of the second top has a second conical surface with the same taper as the inner conical hole of the roller through hole.

4. The processing tooling for a large-size through-hole roller according to claim 2, characterized in that: The blind hole is opened at one end of the first top away from the first top hole, and the other end of the second top is formed with a shaft head, the length of the shaft head is greater than the depth of the blind hole, and the outer diameter of the shaft head is clearance-matched with the inner diameter of the blind hole.

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