Through-type grinding bearing ball processing device and method based on CBN combined abrasive belt

Abstract

The present invention provides a through-type grinding bearing ball processing device and method based on a CBN combined abrasive belt. The processing device comprises an upper abrasive belt, a plurality of first lower abrasive belts and a plurality of second lower abrasive belts. A plurality of upper grooves are spaced apart at the bottom of the upper abrasive belt. Arc grooves are symmetrically provided on both sides of the tops of the first lower abrasive belt and the second lower abrasive belt. Brazing abrasive grain layers are provided on the upper grooves and the arc grooves. The arc grooves provided on the adjacent first lower abrasive belt and the second lower abrasive belt jointly form a lower groove matching the corresponding upper groove. The speeds of the upper abrasive belt, the first lower abrasive belt and the second lower abrasive belt are all different. The processing device and the processing method of the present invention can greatly reduce the problem of repeated correction of roundness in the process of ball processing, and improve the processing efficiency of the ball. At the same time, the present invention simplifies the process equipment and process route, reduces the cost and floor space of the processing equipment, and makes the processing of the ball more convenient and quick.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing processing equipment, and in particular relates to a through-type grinding bearing ball processing device and method based on a CBN combined abrasive belt. Background Art

[0002] Existing bearing balls are all ground on cast iron grinding wheels with concentric hemispherical ring grooves. The main characteristics are that the balls have less freedom of rotation during grinding and it is difficult to meet the requirements for ball roundness at one time. The existing grinding technology belongs to non-penetrating and free abrasive processing, so the grinding efficiency is low and the grinding process is not smooth enough. Summary of the invention

[0003] The purpose of the present invention is to provide a through-type grinding bearing ball processing device and method based on a CBN combined abrasive belt. The present invention utilizes a brazed CBN combined abrasive belt to realize through-type processing of bearing balls, has a smooth grinding route, has a high grinding efficiency of a consolidated abrasive belt, has a simple and convenient grinding process, has a small footprint, has good economy, and has low equipment maintenance costs.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a through-type grinding bearing ball processing device based on a CBN combined abrasive belt, comprising an upper abrasive belt and a lower abrasive belt group matched with the upper abrasive belt, wherein the lower abrasive belt group is composed of a plurality of first lower abrasive belts arranged at intervals and a plurality of second lower abrasive belts arranged in sequence between adjacent first lower abrasive belts, a plurality of upper grooves are arranged at intervals at the bottom of the upper abrasive belt, arc grooves are symmetrically opened on both sides of the top of the first lower abrasive belt and the second lower abrasive belt, a brazing abrasive layer is arranged on the upper groove and the arc groove, the arc grooves opened on the adjacent first lower abrasive belt and the second lower abrasive belt jointly form a lower groove matching the corresponding upper groove, and the speeds of the upper abrasive belt, the first lower abrasive belt and the second lower abrasive belt are all different.

[0005] Furthermore, the upper sanding belt rotates at a high speed in the forward direction, the second lower sanding belt rotates in the reverse direction and the speed is slightly lower than the speed of the upper sanding belt, and the first lower sanding belt periodically performs forward and reverse bidirectional speed change operation.

[0006] Furthermore, the upper sanding belt, the first lower sanding belt and the second lower sanding belt are all stacked by multiple layers of annular thin steel belts, and the outer sides of the multiple layers of thin steel belts are evenly inserted with inserts along the circumferential direction, wherein the bottom of the insert inserted in the upper sanding belt is provided with a plurality of upper grooves at intervals, and the insert inserted in the first lower sanding belt and the insert inserted in the second lower sanding belt are symmetrically provided with arc grooves that cooperate with each other on both sides of the top.

[0007] Furthermore, a slot for inserting the insert into the steel strip is provided at the bottom of the insert, and a transverse buckle groove for positioning is formed in the middle of the insert protruding forward or backward, and adjacent inserts are tightly connected through the transverse buckle groove.

[0008] Furthermore, a plurality of the transverse buckle grooves are arranged at intervals on the insert piece inserted into the upper sanding belt.

[0009] Furthermore, the processing device also includes a feed plate and a discharge plate, which are respectively arranged at the front end and the rear end of the lower sand belt group, and the feed plate is arranged to be tilted upward at one end away from the lower sand belt group.

[0010] Furthermore, an upper sanding belt driving shaft for driving the upper sanding belt to rotate in a forward high-speed direction is arranged on the inner side of the upper sanding belt, and a first lower sanding belt driving shaft for driving the first lower sanding belt to periodically rotate in a forward and reverse bidirectional speed-changing direction and a second lower sanding belt driving shaft for driving the second lower sanding belt to rotate in a reverse direction are arranged on the inner side of the lower sanding belt group.

[0011] Furthermore, an upper supporting wheel shaft and a lower supporting wheel shaft are respectively arranged on the inner sides of the matching end surfaces of the upper sanding belt and the lower sanding belt assembly.

[0012] The processing method of the through-type grinding bearing ball processing device based on the CBN combined abrasive belt comprises the following steps:

[0013] Step 1: The ball enters the processing device along the feeding plate, and the upper abrasive belt rotates at a high speed in the positive direction, which drives the ball to move toward the discharge plate on the one hand, and grinds the surface of the ball on the other hand;

[0014] Step 2: The first lower sanding belt periodically performs forward and reverse bidirectional speed change operation to make the rotating axis of the ball reciprocate in the horizontal plane to increase the uniformity of the roundness of the ball in all directions;

[0015] Step 3: The second lower abrasive belt runs in the reverse direction at a speed slightly lower than that of the first set of abrasive belts. On the one hand, it delays the speed of ball discharge and increases the grinding time of the balls. On the other hand, it plays a dual role of guiding and grinding.

[0016] Step 4: The processed balls flow out from the discharge plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the processing device and processing method of the present invention can greatly reduce the problem of repeated correction of roundness in the ball processing process, thereby improving the processing efficiency of the ball. At the same time, the present invention simplifies the process equipment and process route, reduces the cost and floor space of the processing equipment, and makes the processing of the ball more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of a through-type grinding bearing ball processing device based on a CBN combined abrasive belt according to the present invention;

[0019] Figure 2 It is a schematic diagram of the position relationship between the feeding plate, the discharging plate and the lower abrasive belt group;

[0020] Figure 3 It is a schematic diagram of the positional relationship of the inserts inserted into the upper sanding belt, the first lower sanding belt and the second lower sanding belt;

[0021] Figure 4 It is a schematic diagram of the speed variation of the upper sanding belt, the first lower sanding belt and the second lower sanding belt over time;

[0022] Figure 5 It is a structural schematic diagram of the insert piece inserted into the first lower sanding belt and the second lower sanding belt;

[0023] Figure 6 It is a structural schematic diagram of the insert piece plugged into the upper sanding belt;

[0024] Figure 7 It is a schematic diagram of the state where the insert is plugged into the steel belt;

[0025] Markings in the figure: 1. upper sanding belt, 101. thin steel belt, 102. transverse buckle groove, 103. slot, 104. insert plugged into the upper sanding belt, 105. insert plugged into the first lower sanding belt, 106. insert plugged into the second lower sanding belt, 2. first lower sanding belt, 3. second lower sanding belt, 4. upper groove, 5. arc groove, 6. brazed abrasive layer, 7. feed plate, 8. discharge plate, 9. upper sanding belt driving shaft, 10. first lower sanding belt driving shaft, 11. second lower sanding belt driving shaft, 12. upper support wheel shaft, 13. lower support wheel shaft, 14. ball bearing. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Through-type grinding bearing ball processing device based on CBN combined abrasive belt, such as Figure 1 and Figure 3As shown, it includes an upper sanding belt 1 and a lower sanding belt group matched with the upper sanding belt, the lower sanding belt group is composed of a plurality of first lower sanding belts 2 arranged at intervals and a plurality of second lower sanding belts 3 arranged in sequence between adjacent first lower sanding belts, a plurality of upper grooves 4 are arranged at intervals at the bottom of the upper sanding belt 1, arc grooves 5 are symmetrically opened on both sides of the tops of the first lower sanding belt 2 and the second lower sanding belt 3, and brazing abrasive layers 6 are arranged on the upper grooves 4 and the arc grooves 5, the arc grooves 5 opened on the adjacent first lower sanding belts 2 and the second lower sanding belts 3 together form a lower groove matching the corresponding upper groove 4, and the speeds of the upper sanding belt 1, the first lower sanding belt 2 and the second lower sanding belt 3 are all different. In this embodiment, the schematic diagram of the speed change of the upper sanding belt 1, the first lower sanding belt 2 and the second lower sanding belt 3 over time is shown as follows Figure 4 As shown, the horizontal axis in the figure is time, and the vertical axis is speed. The inner side of the upper sand belt 1 is provided with an upper sand belt driving shaft 9 for driving the upper sand belt to perform forward high-speed operation, and the speed curve of the upper sand belt is shown as S1. The inner side of the lower sand belt group is provided with a first lower sand belt driving shaft 11 for driving the first lower sand belt to perform periodic forward and reverse bidirectional variable speed operation and a second lower sand belt driving shaft 10 for driving the second lower sand belt to perform reverse operation, and the speed curves of the first lower sand belt 2 and the second lower sand belt 3 are shown as S2 and S3 respectively.

[0028] To further optimize this solution, Figure 3 and Figure 7 As shown, the upper sanding belt 1, the first lower sanding belt 2 and the second lower sanding belt 3 are all stacked by multiple layers of annular thin steel belts 101, and the outer sides of the multiple layers of thin steel belts are uniformly inserted with inserts along the circumferential direction, wherein the insert 104 inserted on the upper sanding belt has a plurality of upper grooves 4 spaced apart at the bottom, and the insert 105 inserted on the first lower sanding belt and the insert 106 inserted on the second lower sanding belt have symmetrically opened arc grooves 5 that match each other on both sides of the top.

[0029] To further optimize this solution, Figure 5 and Figure 6 As shown, a slot 103 for inserting the insert into the steel belt is provided at the bottom of the insert, and a transverse buckle groove 102 for positioning is formed at the middle of the insert protruding forward or backward, and adjacent inserts are tightly connected through the transverse buckle groove 102.

[0030] To further optimize the present solution, a plurality of the transverse buckle grooves 102 are arranged at intervals on the insert 104 inserted into the upper sanding belt.

[0031] To further optimize this solution, Figure 2 As shown, the processing device also includes a feed plate 7 and a discharge plate 8, which are respectively arranged at the front end and the rear end of the lower sand belt group, and the feed plate 7 is arranged to be tilted upward at one end away from the lower sand belt group.

[0032] To further optimize the present solution, an upper supporting wheel shaft 12 and a lower supporting wheel shaft 13 are respectively provided on the inner sides of the matching end surfaces of the upper sanding belt 1 and the lower sanding belt assembly.

[0033] The processing method of the through-type grinding bearing ball processing device based on the CBN combined abrasive belt comprises the following steps:

[0034] Step 1: The ball 14 enters the processing device along the feeding plate 7, and the upper abrasive belt 1 rotates at a high speed in the positive direction, which drives the ball to move toward the discharge plate on the one hand, and grinds the surface of the ball on the other hand;

[0035] Step 2: The first lower sanding belt 2 periodically performs forward and reverse bidirectional speed change operation to make the rotating axis of the ball reciprocate in the horizontal plane to increase the uniformity of the roundness of the ball in all directions;

[0036] Step 3: The second lower abrasive belt 3 rotates in the reverse direction at a speed slightly lower than that of the first set of abrasive belts, which, on the one hand, delays the speed of ball discharge and increases the grinding time of the balls, and on the other hand, plays a dual role of guiding and grinding;

[0037] Step 4: The processed balls flow out from the discharge plate 8.

[0038] The device and process method of the present invention can greatly reduce the problem of repeated roundness correction during the processing of the ball 14, improve the processing efficiency of the ball, simplify the process equipment and process route, reduce the cost and floor space of the processing equipment, and make the processing of the ball more convenient and quick.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A through-type grinding bearing ball processing device based on a CBN combined abrasive belt, comprising an upper abrasive belt and a lower abrasive belt group matched with the upper abrasive belt, characterized in that: The lower sanding belt group is composed of a plurality of first lower sanding belts arranged at intervals and a plurality of second lower sanding belts arranged in sequence between adjacent first lower sanding belts, a plurality of upper grooves are arranged at intervals at the bottom of the upper sanding belt, arc grooves are symmetrically opened on both sides of the top of the first lower sanding belt and the second lower sanding belt, and brazing abrasive grain layers are arranged on the upper grooves and the arc grooves, and the arc grooves opened on the adjacent first lower sanding belts and the second lower sanding belts jointly enclose a lower groove matching the corresponding upper groove, and the speeds of the upper sanding belt, the first lower sanding belt and the second lower sanding belt are all different; The upper sanding belt rotates in the forward direction at a high speed, the second lower sanding belt rotates in the reverse direction and the speed is slightly lower than the speed of the upper sanding belt, and the first lower sanding belt periodically performs forward and reverse bidirectional speed changes; the processing device also includes a feeding plate and a discharging plate, which are respectively arranged at the front end and the rear end of the lower sanding belt group, and the feeding plate is arranged to be tilted upward at one end away from the lower sanding belt group.

2. The through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to claim 1 is characterized in that: The upper sanding belt, the first lower sanding belt and the second lower sanding belt are all stacked by multiple layers of thin steel belts in annular shape, and inserts are evenly inserted into the outer sides of the multiple layers of thin steel belts along the circumferential direction, wherein the bottom of the insert inserted into the upper sanding belt is provided with multiple upper grooves at intervals, and the insert inserted into the first lower sanding belt and the insert inserted into the second lower sanding belt are symmetrically provided with arc grooves that match each other on both sides of the top.

3. The through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to claim 2 is characterized in that: The bottom of the insert is provided with a slot for inserting the insert on the steel belt, and the middle of the insert protrudes forward or backward to form a transverse buckle groove for positioning, and adjacent inserts are tightly connected through the transverse buckle groove.

4. The through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to claim 3 is characterized in that: A plurality of transverse buckle grooves are arranged at intervals on the inserting piece inserted into the upper sanding belt.

5. The through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to claim 1 is characterized in that: An upper sanding belt driving shaft for driving the upper sanding belt to rotate in a forward high-speed direction is arranged on the inner side of the upper sanding belt, and a first lower sanding belt driving shaft for driving the first lower sanding belt to periodically rotate in a forward and reverse bidirectional speed-changing direction and a second lower sanding belt driving shaft for driving the second lower sanding belt to rotate in a reverse direction are arranged on the inner side of the lower sanding belt group.

6. The through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to claim 5 is characterized in that: An upper supporting wheel shaft and a lower supporting wheel shaft are respectively arranged on the inner sides of the matching end surfaces of the upper sand belt and the lower sand belt assembly.

7. The processing method of the through-type grinding bearing ball processing device based on the CBN combined abrasive belt according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: The ball enters the processing device along the feeding plate, and the upper abrasive belt rotates at a high speed in the positive direction, which drives the ball to move toward the discharge plate on the one hand, and grinds the surface of the ball on the other hand; Step 2: The first lower sanding belt periodically performs forward and reverse bidirectional speed change operation to make the rotating axis of the ball reciprocate in the horizontal plane to increase the uniformity of the roundness of the ball in all directions; Step 3: The second lower abrasive belt runs in the reverse direction at a speed slightly lower than that of the first set of abrasive belts. On the one hand, it delays the speed of ball discharge and increases the grinding time of the balls. On the other hand, it plays a dual role of guiding and grinding. Step 4: The processed balls flow out from the discharge plate.

Images