阅读说明：本技术 基于大凸度圆锥滚子外径磨削方法及装置 (Method and device for grinding outer diameter of tapered roller based on large convexity ) 是由 邹小洛 何召集 魏万伟 黄飞虎 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种基于大凸度圆锥滚子外径磨削方法及装置,利用无心磨床磨削定位的砂轮、导轮和导板,采用切入法来完成圆锥滚子外径磨削,改变现有导板的支承角度,将现有导板的支承角度加大,以增加滚子自身重量的分力去压向导轮,即增大导轮与滚子间的接触摩擦力,实现驱动滚子旋转；改变现有导板与滚子的接触面积,在导板的支承斜面上镶合金棒,由导板与滚子外径间的线接触,改为合金棒圆柱面与滚子外径间的点接触,减小其接触面积,便于驱动滚子旋转。本发明通过对导板定位方法和结构的变化,使导轮在启动旋转时就能驱动被加工滚子做旋转运动,实现了砂轮小进给磨削和无火花磨削,提高了滚子的加工精度,加工效率和加工质量的稳定性。(The invention discloses a grinding method and a device based on the outer diameter of a large-convexity tapered roller, wherein a grinding wheel, a guide wheel and a guide plate which are positioned by a centerless grinder are utilized, the grinding of the outer diameter of the tapered roller is completed by adopting a cutting-in method, the supporting angle of the existing guide plate is changed, the supporting angle of the existing guide plate is increased, the component force of the self weight of the roller is increased to press the guide wheel, namely, the contact friction force between the guide wheel and the roller is increased, and the roller is driven to rotate; the contact area of the existing guide plate and the roller is changed, the alloy rod is embedded on the supporting inclined plane of the guide plate, and the linear contact between the guide plate and the outer diameter of the roller is changed into the point contact between the cylindrical surface of the alloy rod and the outer diameter of the roller, so that the contact area is reduced, and the roller is convenient to drive to rotate. The guide wheel can drive the processed roller to rotate when the guide wheel is started to rotate by changing the positioning method and the structure of the guide plate, so that the grinding wheel small-feed grinding and sparkless grinding are realized, and the processing precision, the processing efficiency and the processing quality stability of the roller are improved.)

1. A grinding method based on the outer diameter of a large-convexity tapered roller utilizes a grinding wheel, a guide wheel and a guide plate which are ground and positioned by a centerless grinder, and finishes the grinding of the outer diameter of the tapered roller by adopting a cutting-in method, wherein the guide wheel rotates clockwise, under the action of friction force between the guide wheel and the tapered roller, the friction resistance between the tapered roller and the guide plate is overcome, the tapered roller is driven to rotate anticlockwise, the grinding wheel rotates clockwise, and meanwhile, grinding feeding motion is carried out, so that grinding processing is realized, and the grinding method is characterized in that:

a. the supporting angle of the existing guide plate is changed, the supporting angle of the existing guide plate is increased, the component force which increases the self weight of the roller is used for pressing the roller to the guide wheel, namely the contact friction force between the guide wheel and the roller is increased, and the roller is driven to rotate;

b. the contact area of the existing guide plate and the roller is changed, the alloy rod is embedded on the supporting inclined plane of the guide plate, and the linear contact between the guide plate and the outer diameter of the roller is changed into the point contact between the cylindrical surface of the alloy rod and the outer diameter of the roller, so that the contact area is reduced, the frictional resistance is reduced, and the roller is convenient to drive to rotate.

2. The grinding method based on the outer diameter of the tapered roller with large convexity according to claim 1, wherein: in the step b, the alloy rods are contacted with two end faces of the tapered roller, so that the gravity center of the tapered roller is positioned between the two alloy rod supporting points and does not change along with the external diameter prime line of the tapered roller to form a large-convexity curve, and the tapered roller is in a stable state during rotation.

3. The grinding method based on the outer diameter of the tapered roller with large convexity according to claim 1, wherein: in the step a, the supporting angle of the guide plate is 40-50 degrees.

4. The utility model provides a grinding device based on big convexity tapered roller external diameter, includes emery wheel, guide pulley and the baffle of centerless grinder grinding location, characterized by: the supporting angle of the guide plate is 40-50 degrees, the alloy rods are arranged on the guide plate at intervals, so that the linear contact between the guide plate and the outer diameter of the roller is changed into point contact between the cylindrical surface of the alloy rod and the outer diameter of the roller, the contact area is reduced, the friction resistance is reduced, and the roller is driven to rotate conveniently.

5. The grinding device based on the outer diameter of the tapered roller with large convexity according to claim 4, wherein: the two alloy rods are respectively positioned at two end faces of the tapered roller, so that the gravity center of the tapered roller is positioned between the two alloy rod supporting points and does not change along with the external diameter prime line of the tapered roller to form a large-convexity curve, and the tapered roller is in a stable state during rotation.

6. The grinding method based on the outer diameter of the tapered roller with large convexity according to claim 4, wherein: the support angle of the guide plate is 42 degrees, 45 degrees, 47 degrees or 49 degrees.

The technical field is as follows:

the invention relates to a tapered roller grinding method, in particular to a method and a device for grinding the outer diameter of a tapered roller based on large convexity.

Background art:

the convexity of the outer diameter prime line of the tapered roller is usually small, the convexity is generally 0.02mm-0.04mm, the convexity is realized by a centerless cylindrical grinder or a superfinishing machine tool, and the processing precision can meet the requirement of a drawing. With the continuous development of national economy, the demand of the tapered roller with large convexity (convexity is 0.14mm) and high precision in the high-end market is more and more, namely the high-precision machining precision of the tapered roller with large convexity cannot meet the requirement of a process drawing, and the tapered roller with large convexity is a difficult problem and a development trend which need to be solved in the bearing industry of China and even in the future.

At present, the basic structure of centerless grinder grinding location: the grinding wheel, the guide plate and the annular workpiece to be processed are combined (as shown in figure 1), and the high-precision grinding of the outer diameter of the large-convexity tapered roller is completed by a cutting-in method so as to meet the precision requirement of a process drawing.

As can be seen from fig. 1: the guide wheel rotates clockwise, under the action of friction force between the guide wheel and the roller, the friction resistance between the roller and the guide plate is overcome, the roller is driven to rotate anticlockwise, the grinding wheel rotates clockwise, and meanwhile, grinding feeding motion is carried out, so that grinding machining is achieved. It has the problems that: firstly, the guide wheel cannot drive the processed roller to rotate, and only when the grinding wheel realizes feed grinding and reaches a certain grinding spark (reaches a certain contact extrusion force), the roller can be driven to rotate to carry out roller circumferential grinding movement. And secondly, the outer diameter prime line of the roller is a straight line before the roller is processed in the final grinding procedure, and the outer diameter prime line of the roller after grinding is a logarithmic curve with large convexity. Due to the above grinding phenomenon, during grinding, (-) small feed grinding and spark-free (no feed) grinding cannot be realized. Secondly, during grinding of the roller to be machined, the roller outer diameter positioning is gradually changed from a straight line to a logarithmic curve, namely, the guide plate supporting plane causes instability of roller outer diameter convexity in the machining positioning. So that the roundness of the processed roller can not meet the precision requirement that the technical drawing is less than or equal to 0.001 mm.

The invention content is as follows:

the technical problem to be solved by the invention is as follows: the method and the device for grinding the outer diameter of the tapered roller based on the large convexity have the advantages of overcoming the defects of the prior art, along with reasonable design, capability of promoting the rotation of the roller and improvement of processing precision.

The technical scheme of the invention is as follows:

a grinding method based on the outer diameter of a large-convexity tapered roller utilizes a grinding wheel, a guide wheel and a guide plate which are ground and positioned by a centerless grinder, and finishes the grinding of the outer diameter of the tapered roller by adopting a cutting-in method, wherein the guide wheel rotates clockwise, under the action of friction force between the guide wheel and the tapered roller, the friction resistance between the tapered roller and the guide plate is overcome, the tapered roller is driven to rotate anticlockwise, the grinding wheel rotates clockwise, and meanwhile, grinding feeding motion is carried out, so that grinding processing is realized, and the grinding method is characterized in that:

a. the supporting angle of the existing guide plate is changed, the supporting angle of the existing guide plate is increased, the component force which increases the self weight of the roller is used for pressing the roller to the guide wheel, namely the contact friction force between the guide wheel and the roller is increased, and the roller is driven to rotate;

b. the contact area of the existing guide plate and the roller is changed, the alloy rod is embedded on the supporting inclined plane of the guide plate, and the linear contact between the guide plate and the outer diameter of the roller is changed into the point contact between the cylindrical surface of the alloy rod and the outer diameter of the roller, so that the contact area is reduced, the frictional resistance is reduced, and the roller is convenient to drive to rotate.

In the step b, the alloy rods are contacted with two end faces of the tapered roller, so that the gravity center of the tapered roller is positioned between the two alloy rod supporting points and does not change along with the external diameter prime line of the tapered roller to form a large-convexity curve, and the tapered roller is in a stable state during rotation. In the step a, the supporting angle of the guide plate is 40-50 degrees.

A grinding device based on the outer diameter of a large-convexity tapered roller comprises a grinding wheel, a guide wheel and a guide plate which are positioned by a centerless grinder in a grinding mode, wherein the support angle of the guide plate is 40-50 degrees, alloy rods are arranged on the guide plate at intervals, so that the linear contact between the guide plate and the outer diameter of the roller is changed into point contact between the cylindrical surface of the alloy rods and the outer diameter of the roller, the contact area is reduced, the friction resistance is reduced, and the roller is driven to rotate conveniently.

The two alloy rods are respectively positioned at two end faces of the tapered roller, so that the gravity center of the tapered roller is positioned between the two alloy rod supporting points and does not change along with the external diameter prime line of the tapered roller to form a large-convexity curve, and the tapered roller is in a stable state during rotation. The support angle of the guide plate is 42 degrees, 45 degrees, 47 degrees or 49 degrees.

The invention has the beneficial effects that:

1. the guide wheel can drive the processed roller to rotate when the guide wheel is started to rotate by changing the positioning method and the structure of the guide plate, so that the grinding wheel small-feed grinding and sparkless grinding are realized, and the processing precision, the processing efficiency and the processing quality stability of the roller are improved.

2. The guide plate supporting angle is reasonably selected to increase the component force of the self weight of the roller to press the guide wheel, namely, the contact friction force between the guide wheel and the roller is increased to drive the roller to rotate.

3. According to the invention, the alloy rod is embedded on the guide plate supporting inclined plane, and the linear contact between the guide plate surface and the outer diameter of the roller is changed into the point contact between the cylindrical surface of the alloy rod and the outer diameter of the roller, so that the contact area, namely the frictional resistance, is reduced, and the roller is driven to rotate conveniently.

4. The two alloy rods on the supporting surface of the guide plate are contacted with the two end surfaces of the roller, so that the gravity center of the roller is positioned between the supporting points of the two alloy rods and does not change along with the external diameter prime line of the roller in a large-convexity curve, and the roller is in a stable state during rotation.

5. The invention has reasonable design, can promote the rotation of the roller and improve the processing precision, solves the processing precision of the outer diameter of the large-convexity tapered roller on the centerless grinding machine, and meets the problem that the roundness of a process drawing is less than or equal to 0.001 mm. Is convenient to realize and popularize and has higher economic benefit and social benefit.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a prior art tapered roller outer diameter grinding device;

FIG. 2 is a schematic structural diagram of a grinding device based on the outer diameter of a large-convexity tapered roller;

fig. 3 is a side view of the guide plate and the tapered rollers of fig. 2.

The specific implementation mode is as follows: