An ultra-precision grinding machine for ultra-grinding cylindrical roller correction wire busbars

Abstract

An ultra-fine grinding machine for ultra-fine grinding cylindrical roller correction line feedstocks belongs to the field of ultra-fine grinding equipment. This invention addresses the problem of low processing efficiency in existing ultra-fine grinding methods that use two machines simultaneously to achieve the ultra-fine grinding of cylindrical roller correction line feedstocks. The invention comprises an ultra-fine grinding machine body, two guide rollers, and several oilstones. The two guide rollers are arranged side-by-side on the ultra-fine grinding machine body, with their axes intersecting at an angle. The several oilstones are arranged side-by-side along the length of the guide rollers, directly above the space between the two guide rollers. Several cylindrical rollers are positioned within the gap between the two guide rollers and move back and forth along the axis of the guide roller feedstock as the guide rollers rotate. Each guide roller includes several integrally formed arc-shaped guide roller segments and two straight guide roller segments. The arc-shaped guide roller segments and the two straight guide roller segments are coaxially arranged, with the arc-shaped guide roller segments positioned between the two straight guide roller segments. This invention is primarily used for ultra-fine grinding of roller correction line feedstocks.

Description

Technical Field

[0001] This invention pertains to ultra-precision grinding equipment, and more particularly to an ultra-precision grinding machine for ultra-precision grinding of cylindrical roller correction wire busbars. Background Technology

[0002] Contouring cylindrical rollers helps to weaken the roller edge effect, improve bearing load-bearing capacity, increase bearing reliability, and extend bearing life. Currently, the outer diameter generatrix shape of cylindrical rollers is mostly a modified line shape, that is, the two ends are curved and the middle part is a straight line. The formation of the outer diameter generatrix of cylindrical rollers relies on the vibration of the guide rollers and the honing stone of the ultra-precision machine. Its shape is completed by the shape of the guide roller generatrix. The rollers are fed along a trajectory with a certain radius of curvature in a "jumping" manner in the same vertical plane between the two rollers. The honing stone is placed above the center of the convex peak between the two rollers, and the working surface of the honing stone is shaped on the trajectory curve of the rollers. When the roller being processed passes through, the required outer diameter convexity generatrix is ​​formed.

[0003] The generatrix shape of the roller is formed by the shape of the guide roller. If the generatrix is ​​fully convex, meaning there is no straight section in the middle, it can be achieved using only a convex guide roller. When the outer diameter is a correction line shape, a convex guide roller is needed to grind the arc R at both ends of the roller. The straight section in the middle requires a straight generatrix guide roller. Because there is an intersection angle between the two guide rollers, the outer diameter shape of the straight generatrix guide roller is actually ground from a single-leaf hyperboloid. This requires two machines to work together, one equipped with a convex guide roller and the other with a straight guide roller. Using two machines together to achieve ultra-precision grinding of the correction line generatrix of cylindrical rollers results in low processing efficiency for cylindrical rollers. Therefore, a high-efficiency processing method is needed to achieve ultra-grinding of the correction line generatrix of cylindrical rollers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing method of using two machines to achieve ultra-precision grinding of the correction line busbar of cylindrical rollers has low processing efficiency. Therefore, the present invention provides an ultra-precision grinding machine for ultra-grinding the correction line busbar of cylindrical rollers.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] An ultra-fine grinding mill for ultra-grinding cylindrical roller correction line generatrices includes an ultra-grinding mill body, two guide rollers, and several oilstones. The two guide rollers are arranged side by side on the ultra-grinding mill body, and their axes intersect at an angle. The several oilstones are arranged side by side along the length of the guide rollers and directly above the two guide rollers. The several cylindrical rollers are located in the gap between the two guide rollers and move back and forth along the axis of the guide roller generatrices under the rotation of the guide rollers.

[0007] Each guide roller includes several integrally formed arc-shaped guide roller segments and two straight guide roller segments. The arc-shaped guide roller segments and the two straight guide roller segments are coaxially arranged, and the arc-shaped guide roller segments are located between the two straight guide roller segments.

[0008] Furthermore, the straight section guide roller is a cone with a certain taper.

[0009] Furthermore, each guide roller is 880mm long, each arc section of the guide roller is 114mm long, and each straight section of the guide roller is 269mm long.

[0010] Furthermore, let the radius of the arc-shaped guide roller be R, R = [Lw - 2rpl] 2 -L1 2 ] / 8δ; where Lw is the nominal length of the roller, rp1 is the coordinate of the roller chamfer, L1 is the length of the straight section of the roller, and δ is the convexity of the roller.

[0011] Furthermore, the oilstone includes several flat oilstones and several curved oilstones, with the flat oilstones positioned at the straight section guide rollers and the curved oilstones positioned at the arc section guide rollers.

[0012] Furthermore, directly below the curved surface of the oilstone is an inwardly concave curved surface, wherein the curvature of the curved surface of the oilstone is the same as the curvature of the curved surface of the circular arc segment guide roller, and the extension direction of the curved surface of the oilstone is the same as the length direction of the guide roller.

[0013] The beneficial effects of this invention compared to the prior art are:

[0014] The guide roller of the present invention is a specially made guide roller. The middle section of the guide roller is an arc section guide roller, and the two ends of the guide roller are straight section guide rollers. This application can achieve the super-grinding of the cylindrical roller correction line generatrix by using two specially made guide rollers and an oilstone. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are provided to further illustrate the invention.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Explanation of reference numerals in the attached diagram: 1-Circular arc guide roller; 2-Straight line guide roller; 3-Flat whetstone; 4-Curved whetstone. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] See Figure 1 This application provides an ultra-fine grinding mill for ultra-grinding cylindrical roller correction line busbars, which includes an ultra-grinding mill body, two guide rollers and several oilstones. The two guide rollers are arranged side by side on the ultra-grinding mill body, and their axes intersect at an angle. The several oilstones are arranged side by side along the length direction of the guide rollers and directly above the two guide rollers. The several cylindrical rollers are located in the gap between the two guide rollers and move back and forth along the axis direction of the guide roller busbar under the rotation of the guide rollers.

[0020] In this embodiment, each guide roller includes several integrally formed arc-shaped guide roller segments 1 and two straight guide roller segments 2. The arc-shaped guide roller segments 1 and the two straight guide roller segments 2 are coaxially arranged, and the arc-shaped guide roller segments 1 are located between the two straight guide roller segments 2.

[0021] Furthermore, the straight section guide roller 2 is a cone with a certain taper, and the slope of the straight section guide roller 2 is consistent with the size of the intersection angle of the two guide rollers.

[0022] Furthermore, the length of each guide roller is 880mm, the length of each arc section of guide roller 1 is 114mm, and the length of each straight section of guide roller 2 is 269mm.

[0023] Furthermore, let the radius of the arc segment guide roller 1 be R, R = [Lw - 2rpl] 2 -L1 2 ] / 8δ; where Lw is the nominal length of the roller, rp1 is the coordinate of the roller chamfer, L1 is the length of the straight section of the roller, and δ is the convexity of the roller.

[0024] In this embodiment, the oilstone includes several flat oilstones 3 and several curved oilstones 4. The flat oilstones 3 are disposed at the straight section guide roller 2, and the curved oilstones 4 are disposed at the arc section guide roller 1.

[0025] Furthermore, the area directly below the arc-shaped oilstone 4 is an inwardly concave arc surface, wherein the curvature of the arc surface of the arc-shaped oilstone 4 is the same as the curvature of the arc surface of the circular arc segment guide roller 1, and the extension direction of the arc surface of the arc-shaped oilstone 4 is the same as the length direction of the guide roller.

[0026] The following further explains the working process of the present invention to further demonstrate its working principle and advantages:

[0027] When the two guide rollers rotate around their own axes, several cylindrical rollers between the two guide rollers move along the axis of the guide roller generatrix. The cylindrical rollers first move towards the arc section guide roller 1 along the axis of the generatrix of the straight section guide roller 2 under the action of the straight section guide roller 2 and the flat oilstone 3 above it. During this process, the generatrix of the cylindrical roller is ground into a straight line. When the cylindrical roller moves along the arc section guide roller 1, the generatrix of the cylindrical roller is ground into an arc shape by the outer arc surface of the arc section guide roller 1 and the lower surface of the arc surface oilstone 4. When the arc surface cylindrical roller moves back to the straight section guide roller 2, the arc surface cylindrical roller is over-ground by the straight section guide roller 2 and the flat oilstone 3 above it, forming a roller with arc-shaped ends and a straight middle. Since the grinding amount on the roller surface is small each time, after the back and forth movement of the two guide rollers in this application, a cylindrical roller with a corrected generatrix is ​​finally produced.

[0028] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A superfinishing machine for superfinishing a cylindrical roller correction wire generatrix, characterized in that: It includes super grinder body, two guide rollers and several oil stones, the two guide rollers are arranged side by side on the super grinder body, and the axes of the two guide rollers have a crossing angle, the several oil stones are arranged side by side above the two guide rollers along the length direction of the guide rollers, and the several cylindrical rollers are in the gap between the two guide rollers and move along the axis direction of the guide roller generatrix under the rotation of the guide rollers; Each guide roller includes several arc segment guide rollers (1) and two straight line segment guide rollers (2) integrally manufactured, the several arc segment guide rollers (1) and the two straight line segment guide rollers (2) are coaxially arranged, and the several arc segment guide rollers (1) are between the two straight line segment guide rollers (2); The oil stone includes several plane oil stones (3) and several arc surface oil stones (4), the plane oil stones (3) are arranged at the straight line segment guide rollers (2), and the arc surface oil stones (4) are arranged at the arc segment guide rollers (1).

2. A superfinishing machine for superfinishing a cylindrical roller correction wire generatrix according to claim 1, characterized in that: The generatrix of the straight line segment guide roller (2) is a single-leaf hyperboloid.

3. A superfinishing machine for superfinishing a cylindrical roller correction wire generatrix according to claim 1, characterized in that: The length of each guide roller is 880mm, the length of each arc segment guide roller (1) is 114mm, and the length of each straight line segment guide roller (2) is 269mm.

4. A superfinishing machine for superfinishing a cylindrical roller correction wire generatrix according to claim 1, characterized in that: Let the radius of the circular arc segment guide roller (1) be R, R=[(Lw-2rp1) 2 - L1 2 ] / (8δ); wherein Lw is the nominal length of the roller, rp1 is the coordinate of the chamfer of the roller, L1 is the length of the straight line segment of the roller, and δ is the crown of the roller.

5. A superfinishing machine for superfinishing a cylindrical roller correction wire generatrix according to claim 1, characterized in that: The arc surface oil stone (4) is concave downward, the curvature of the arc surface of the arc surface oil stone (4) is the same as that of the arc segment guide roller (1), and the extension direction of the arc surface of the arc surface oil stone (4) is the same as the length direction of the guide roller.

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