Efficient grinding mechanism
By combining internal and external grinding wheels and using an alternating feed tray design, the problem of uneven grinding wheel wear when grinding small-diameter springs is solved, improving grinding accuracy and productivity while reducing grinding wheel costs.
Patent Information
- Application Number
- CN202511833930.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-03-03
AI Technical Summary
When grinding small-diameter springs, existing CNC spring grinding machines suffer from uneven wear on the grinding wheel surface, resulting in low grinding accuracy and production efficiency. Furthermore, the uneven grinding force affects the spring's vertical accuracy and productivity.
It adopts an inner and outer grinding wheel combination structure, and the material tray is designed with two rings of staggered placement holes. Combined with the planar motion mechanism, the spring is evenly ground in the gap between the inner and outer grinding wheels, and the grinding accuracy is ensured by the adjustment component. The automatic rotation torque is generated by the reverse grinding force of the inner and outer grinding wheels, which improves the grinding perpendicularity.
This achieves uniform grinding wheel wear, extends the time for grinding accuracy stability, improves grinding productivity and spring vertical accuracy, and reduces grinding wheel costs.
Smart Images
Figure CN121589680A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of metal cutting machine tools, and in particular to a high-efficiency grinding mechanism. Background Technology
[0002] Currently, grinding small-diameter springs is mainly done on CNC vertical double-end face spring grinding machines, using a disc-type feeding method to grind both ends of the spring. A simplified schematic diagram of this grinding machine structure is attached (refer to the instruction manual). Figure 1 ).
[0003] The working principle of this grinding machine is as follows: First, springs are manually placed into all the grinding sleeves on the grinding disc. Second, the grinding disc rotates in the direction shown in the diagram. Each spring is driven by the grinding disc, moving from point C, through point D to point A on the outer circle of the grinding wheel plane, then through point B on the inner circle of the grinding wheel plane to point C on the outer circle of the grinding wheel plane. Because the upper grinding wheel feeds continuously downwards during the spring's movement, both ends of each spring are ground by the grinding wheel. When the required spring size is achieved, the feed stops. Then, the upper grinding wheel returns to its origin, the unloading gate opens, and the ground springs, driven by the grinding disc, fall one by one through the unloading gate, completing the entire grinding process. To grind the next batch of springs, simply close the unloading gate and repeat the above process.
[0004] However, the above-mentioned CNC computer-controlled spring grinding machine structure has the following disadvantages: Disadvantage 1: In this type of CNC spring grinding machine, the spring's movement trajectory during operation is a circle. First, let's analyze the arc where the spring doesn't move between the two grinding wheel planes. This arc runs from point C to point D, then back to point A, with a central angle of 360° - α. Assuming the spring moves one circumference and the upper grinding wheel feed is f, then when the spring isn't moving between the grinding wheel planes, the upper grinding wheel feed is (360° - α)f / 360°. According to this CNC spring grinding machine structure, angle α is always below 90°. Therefore, when the spring isn't moving between the two grinding wheel planes, the feed is above 0.75f. This means that when the spring moves to point A and just enters the grinding space between the two grinding wheels, the grinding depth suddenly reaches above 0.75f. Next, let's analyze the arc where the spring moves between the two grinding wheel planes. This arc runs from point A to point B, then back to point C, with a central angle of α. When the spring moves along the arc between the grinding wheel surfaces, the feed rate of the upper grinding wheel is (α / 360°)f, which is less than 0.25f, meaning the grinding amount is much smaller than at point A. Therefore, in this computer-controlled spring grinding machine structure, during the spring's movement, the wear on the grinding wheel at point A is at its maximum, gradually decreasing to its minimum at point B, and the spring is not worn at point C at all. This problem is even more pronounced with springs with small coil ratios. Consequently, the wear on the grinding wheel surface is very uneven, and the grinding wheel flatness stability time is very short. Even if the spring moves one circumference, the feed rate of the upper grinding wheel is very small, and the grinding wheel flatness stability time is also short.
[0005] Disadvantage 2: Because each spring moves from point A on the outer circle of the grinding wheel plane to point C on the inner circle of the grinding wheel plane during grinding, the grinding linear speed at point A and point B differs greatly. Therefore, the wear speed at point A is greater than that at point B, resulting in more uneven wear on the grinding wheel plane.
[0006] Disadvantage 3: Poor stress performance during grinding. Because the point of application of the grinding resultant force is close to point A on the grinding wheel, the grinding wheel shaft is subjected to a large bending moment and large deflection deformation. Therefore, during heavy grinding, the parallelism accuracy of the two grinding wheels deteriorates, which seriously affects the perpendicularity accuracy of the grinding spring.
[0007] Disadvantage 4: Not the entire grinding wheel surface is grinding the spring simultaneously. Therefore, productivity is low.
[0008] In conclusion, whether considering the equipment structure, the quality of the ground springs, or the grinding production efficiency, the working principle and structure of CNC spring grinding machines currently require innovation. Therefore, a technology particularly suitable for grinding large batches of springs with small winding ratios has been invented. Summary of the Invention
[0009] In order to improve the quality and production efficiency of grinding large batches of springs with small winding ratios, this application provides a high-efficiency grinding mechanism.
[0010] This application provides a high-efficiency grinding mechanism, which adopts the following technical solution: A high-efficiency grinding mechanism includes a housing and an upper grinding wheel, a lower grinding wheel, and a feed tray mounted on the housing. The upper and lower grinding wheels are each composed of an inner grinding wheel and an outer grinding wheel of the same width, with the outer grinding wheel fitted over the inner grinding wheel. Both the inner and outer grinding wheels are driven by a transmission mechanism on the housing, and their rotation directions are opposite. Alternatively, the rotation directions of either the inner or outer grinding wheels may be the same. The feed tray is rotatably mounted on the housing, positioned between the upper and lower grinding wheels, and its surface is circular with its center as the center. Two rings of placement holes are evenly distributed around the center of the tray, with the average radius of the two rings being the distance from the gap between the inner and outer grinding wheels to the center of the tray. The spring to be ground is placed in the placement holes. A planar motion mechanism is provided on the housing, which controls the tray to swing between the upper and lower grinding wheels. During the grinding process, the rotation center of the spring in the inner and outer ring placement holes will move to the gap between the inner and outer grinding wheels. Under the action of the planar motion mechanism, the tray not only moves left and right, but also swings back and forth.
[0011] By adopting the above technical solution, after the entire spring disc is placed between the upper and lower grinding wheel planes, the upper grinding wheel feeds downwards. As the upper and lower grinding wheels rotate, the springs are ground. Simultaneously, the power drives the transmission component to rotate, that is, it drives the slider shaft to rotate, thereby causing the slide shaft to rotate in a circle around the center line of the slider shaft. At this time, the large hole on the left side of the material disc is between the upper and lower grinding wheel surfaces, moving not only left and right but also back and forth, i.e., planar motion. During the spring grinding process, the centers of both the inner and outer springs can reach the gap between the inner and outer grinding wheels. This means that each spring can move to the inner and outer grinding wheel surfaces, resulting in more uniform grinding wheel wear, stabilizing the flatness accuracy of the grinding wheel, extending the grinding accuracy stability time, and saving grinding wheel costs. At the same time, each spring's upper and lower end faces are subjected to grinding forces from both the inner and outer grinding wheels. These two grinding forces are in opposite directions, and their lines of action do not pass through the spring center. Therefore, the combined grinding forces on each spring's upper and lower end faces generate an automatic rotational torque, meaning the spring is being ground in an automatic rotational state, improving the grinding perpendicularity accuracy.
[0012] Optionally, the adjusting bolt assembly includes: A head cover is provided on the right end face of the concave square part of the lower section of the slide block. The head cover is connected to the concave square part by bolts. A hole is provided in the center of the head cover, and an adjusting bolt is provided in the hole. The outer circle of the middle section of the adjusting bolt is clearance-fitted with the center hole of the head cover. The external thread of the left section of the bolt is engaged with the internal thread of the center of the square part of the slide block. A hexagonal nut is engaged on the external thread of the right section of the bolt. The bolt and the hexagonal nut are fixed together by a cylindrical pin.
[0013] By adopting the above technical solution, the adjustment component can achieve fine adjustment of the relative position between the slider shaft and the slide base shaft. Turning the hexagonal nut rotates the adjusting screw, causing the lower groove of the slide base shaft to slide on the upper convex part of the slider shaft. This, in turn, adjusts the position of the material tray seat and the material tray, ensuring precise relative positioning between the spring and the grinding wheel during slider shaft rotation. This guarantees grinding accuracy and results in extremely high grinding productivity and precision, significantly reducing grinding wheel costs. Furthermore, it facilitates adaptive adjustments for springs of different specifications, improving the equipment's versatility.
[0014] Optionally, a wear-resistant spring sleeve is provided on the inner wall of the placement hole of the material tray.
[0015] By adopting the above technical solution, the wear-resistant spring sleeve can be made of nylon or metal. During the spring insertion into the placement hole and the grinding process, it can effectively buffer the collision and friction between the spring and the hole wall, avoiding scratches, pressure marks, and other damage to the spring surface, thus ensuring the appearance quality of the spring. At the same time, it extends the service life and further improves the grinding quality.
[0016] Optionally, the two rings of placement holes have the same number, and the inner ring placement holes and the outer ring placement holes are staggered in the same radial direction.
[0017] By adopting the above technical solution, the staggered placement holes can prevent the inner and outer ring springs from interfering with each other during grinding, ensuring that each spring can independently and fully contact the inner and outer grinding wheels, thus guaranteeing grinding uniformity. Simultaneously, the same number of inner and outer ring placement holes can balance the force on the grinding disc, reducing disc vibration during grinding and improving equipment operational stability. Furthermore, the staggered distribution can increase the distribution density of placement holes on the grinding disc, accommodating more springs within a limited disc area, further increasing the output per grinding cycle and improving production efficiency.
[0018] In summary, the beneficial technical effects of this application are as follows: 1. A mechanism was created that allows the two-ring spring tray to move not only left and right, but also back and forth, so that the rotation center of the inner and outer springs can be located at the gap between the inner and outer grinding wheels, achieving uniform grinding wheel wear, saving grinding wheel costs, and improving the flatness accuracy of the grinding spring.
[0019] 2. A two-ring spring grinding combination mechanism was created—the material tray not only moves left and right, but also swings back and forth, and the inner and outer grinding wheels rotate in combination. This significantly improves the uniformity of grinding wheel wear (because 1: when each spring reaches the gap between the inner and outer grinding wheels, both the upper and lower ends of the spring are subjected to grinding forces from the inner and outer grinding wheels. These two grinding forces are in opposite directions, and their lines of action do not pass through the center of the spring. Therefore, the combined grinding forces on the upper and lower ends of each spring generate an automatic rotational torque, meaning the spring is being ground while in an automatic rotational state. Because 2: assuming the inner grinding wheel plane is lower than the outer grinding wheel plane, then the rotation center of the outer spring moves to...). At the gap between the inner and outer grinding wheels, the inner grinding wheel plane does not participate in grinding the outer spring end face; that is, the inner grinding wheel plane does not wear, only the outer grinding wheel plane wears. Therefore, the inner and outer grinding wheel planes tend to be flush (at the same height). Similarly, assuming the outer grinding wheel plane is lower than the inner grinding wheel plane, when the rotation center of the inner spring moves to the gap between the inner and outer grinding wheels, the outer grinding wheel plane does not participate in grinding the outer spring end face; that is, the outer grinding wheel plane does not wear, only the inner grinding wheel plane wears. Therefore, the inner and outer grinding wheel planes tend to be flush. Thus, the flatness accuracy of the grinding wheels is maintained, significantly improving the flatness accuracy and perpendicularity accuracy of the grinding spring. Moreover, grinding two coils of springs greatly improves productivity. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the grinding machine structure in the background art of this application; Figure 2 This is a three-dimensional structural diagram of this application; Figure 3 yes Figure 2 A cross-sectional schematic diagram of the EE; Figure 4 , Figure 5 and Figure 6 This is a diagram showing the positional relationship between the inner diameter of the spring on the material tray and the outer diameter of the outer grinding wheel when the slide shaft rotates at different angles. Figure 7 These are the three views of the slider axis; Figure 8 These are the three views of the slide shaft; Figure 9 These are the three views of the head cover; Figure 10 These are the three views of the adjusting bolt.
[0021] Appendix Figure 1 Markings: 1. Upper grinding wheel; 2. Lower grinding wheel; 3. Unloading gate; 4. Material support plate; 5. Spring; 6. Grinding sleeve; 7. Grinding disc; 8. Grinding disc shaft; Appendix Figures 2 to 10 Markings: 1. Inner grinding wheel; 2. Outer grinding wheel; 3. Spring; 4. Material tray; 5. Material tray seat; 11. Square plate; 12. Box body; 13. Gear; 14. First round nut; 15. First bearing; 16. Slider shaft; 17. Head cover; 18. Adjusting bolt; 19. Cylindrical pin; 20. Hexagonal nut; 21. Material tray seat support shaft; 22. Second bearing; 23. Second round nut; 24. Slider shaft; 26. Bearing seat; 27. Third bearing. Detailed Implementation
[0022] The following is in conjunction with the appendix Figure 2 -Appendix Figure 10 This application will be described in further detail.
[0023] This application discloses a high-efficiency grinding mechanism.
[0024] Reference Figure 2 and Figure 3 The high-efficiency grinding mechanism includes concentrically arranged upper and lower grinding wheels and a grinding disc 4. The upper and lower grinding wheels have identical structures, each consisting of inner and outer grinding wheels 2. The outer grinding wheel 2 is fitted over the inner grinding wheel 1, and the widths of the upper, lower, inner, and outer grinding wheels are equal. All four grinding wheels are driven to rotate by a transmission mechanism (not shown in the figure). The inner or outer grinding wheels rotate in the same direction, while the inner and outer grinding wheels 2 rotate in opposite directions, ensuring that they rotate around the spring 3, achieving high-precision and high-efficiency grinding. All grinding wheels are made of diamond, and the surface of the grinding wheels is coated with an anti-slip and wear-resistant coating.
[0025] Reference Figure 2 and Figure 3The feed tray 4 is horizontally positioned between the upper and lower grinding wheels and is fixedly connected to the feed tray base 5. Two concentric rings of placement holes are evenly distributed around the center of the feed tray 4. The number of placement holes in both rings is the same, and the inner and outer rings of placement holes are staggered along the same radius. The average radius of the two rings of placement holes is equal to the distance from the gap between the inner and outer grinding wheels to the center of rotation of the grinding wheels. This ensures that after the spring 3 is placed in the placement hole, under the action of the planar motion mechanism, the centers of rotation of the inner and outer rings of spring 3 move to the gap between the inner and outer grinding wheels, making full contact with them. A wear-resistant spring sleeve is installed on the inner wall of the placement hole to protect the surface of the spring 3 from damage. The placement hole is a through hole.
[0026] Reference Figure 2 and Figure 3 The planar motion mechanism includes: holes on the upper and lower plates of the housing 12; a first bearing 15 is installed in each of the two holes; a slider shaft 16 is installed in each of the two bearing holes; a round nut 14 is engaged on the outer thread of the lowest section of the slider shaft 16; a transmission component is fixedly connected to the outer circumference of the middle section of the slider shaft 16; the slider shaft 16 is driven to rotate by the transmission component; the upper section of the slider shaft 16 is a protrusion with an internally threaded hole in the horizontal direction; the lower section of the slide block 24 is a concave block; the concave block fits over the protrusion of the slider shaft 16, and the concave and convex parts form a slider pair; the sliding direction of the slider pair is perpendicular to the rotation axis of the slider seat and the slider shaft 16; the lower section of the slide block 24 is a concave block. An adjusting bolt 18 assembly is provided on the right end face; a second bearing 22 is provided in each of the upper and lower section holes of the material tray seat 5 support, and the middle section of the slide shaft 24 is provided in the two bearing holes. A round nut 23 is engaged on the external thread of the uppermost section of the slide shaft 24; the right section hole of the material tray seat 5 is fitted onto the support of the material tray seat 5 and is fixedly connected to the upper end face of the flange of the support of the material tray seat 5. A long groove is provided in the middle section of the material tray seat 5, and a third bearing 27 is provided in the long groove. A third bearing 27 support is provided at the bottom of the third bearing 27. The third bearing 27 support is fixedly connected to the upper part of the angle plate 11. The left side of the angle plate 11 is fixedly connected to the outside of the right plate of the box body 12. The material tray 4 is fixedly connected to the upper end face of the right large hole of the material tray seat 5.
[0027] Reference Figure 2 and Figure 3The rotation radius of the slide shaft 24 and the slider shaft 16 is set to r. Before grinding, r is adjusted by turning the adjusting nut 20 with a wrench, which increases or decreases the rotation radius of the slide shaft 24 and the slider shaft 16, i.e., increases or decreases r. When the feed tray is designed with D3-D5=D0-D1-d1 (e.g., d1 is the inner diameter of the spring), then r=0.25(D0-D2)-0.25(D3-D5)-0.5d1 is the formula. Adjusting r to this calculated size ensures that during the rotation of the slider shaft 16, there is a process where the inner diameter of the outer spring is nearly tangent to the outer diameter of the outer grinding wheel 2 (internal tangency), and the inner diameter of the inner spring is nearly tangent to the inner diameter of the inner grinding wheel 1 (external tangency). If d1 is taken as the outer diameter of the spring, then r is calculated to obtain another dimension. Adjusting r to this other dimension ensures that during the rotation of the slider shaft 16, there is a process where the outer diameter of the outer ring spring 3 is nearly tangent (internal tangent) to the outer diameter of the outer grinding wheel 2, and the outer diameter of the inner ring spring is nearly tangent (external tangent) to the inner diameter of the inner grinding wheel 1. The above method of design, calculation, and adjustment achieves uniform wear of the grinding wheel during spring grinding, saving grinding wheel costs and maintaining the flatness accuracy of the grinding wheel.
[0028] Reference Figure 2 and Figure 3 Let me reiterate the grinding principle and effect: First, the entire spring 3 is placed between the upper and lower grinding wheel planes (grinding position). Then, the upper grinding wheel feeds downwards, and the spring 3 is ground as the upper and lower grinding wheels rotate. At the same time, the power drives the slider shaft 16 to rotate through the transmission component, thereby driving the slide shaft 24 to rotate around the center line of the slider shaft 16 in a circular motion with a radius of r. At this time, the large hole in the left section of the material tray 5 is between the upper and lower grinding wheel surfaces, and it not only moves left and right, but also swings back and forth (because there is a bearing controlling it in the long groove in the middle section of the material tray 5). In other words, the material tray 4 set on it not only moves left and right, but also swings back and forth.
[0029] The following example uses d1 to determine the inner diameter of the spring: When the slider shaft 16 rotates at... Figure 2 The position is the intersection point on the grinding wheel surface when the symmetry line of the material tray 5 is collinear with the X-axis (the intersection of the gap between the inner and outer grinding wheels and the X-axis). At the left (point C), the inner diameter of the outer ring spring 3 on the material tray 4 is tangent to the outer diameter of the outer grinding wheel 2 (internal tangent), and at the right (point A), the inner diameter of the inner ring spring 3 on the material tray 4 is tangent to the inner diameter of the inner grinding wheel 1 (external tangent).
[0030] When the slider shaft 16 rotates counterclockwise 90-a degrees (as shown in the image) Figure 4 At the intersection of the grinding wheel surfaces (because r is a small amount relative to S in the design, so angle a is very small and can be ignored, therefore, it can be considered (in the following discussion) that the inner and outer grinding wheel gaps intersect with the G axis), at the upper (B) material tray 4, the inner diameter of the outer ring spring 3 is nearly tangent to the outer diameter of the outer grinding wheel 2 (inner tangent), and at the lower (D) material tray 4, the inner diameter of the inner ring spring 3 is nearly tangent to the inner diameter of the inner grinding wheel 1 (outer tangent).
[0031] When slider shaft 16 rotates another 90+a degrees (as shown in the image) Figure 5 At the position), at the intersection of the grinding wheel surfaces (where the gap between the inner and outer grinding wheels intersects with the X-axis), the inner diameter of the inner ring spring 3 on the left (C point) of the material tray 4 is nearly tangent to the inner diameter of the inner grinding wheel 1 (outer tangent), and the inner diameter of the outer ring spring 3 on the right (A point) of the material tray 4 is nearly tangent to the outer diameter of the outer grinding wheel 2 (inner tangent).
[0032] When slider shaft 16 rotates another 90+a degrees (as shown in the image) Figure 6 At the position), at the intersection of the grinding wheel surfaces (where the gap between the inner and outer grinding wheels intersects with the G axis), the inner diameter of the inner ring spring 3 on the upper (B) material tray 4 is nearly tangent to the inner diameter of the inner grinding wheel 1 (outer tangent), and the inner diameter of the outer ring spring 3 on the lower (D) material tray 4 is nearly tangent to the outer diameter of the outer grinding wheel 2 (inner tangent).
[0033] During the 360° rotation of the slider shaft 16, the radial movement distance of the grinding wheel is basically equal for springs 3 at points A, B, C, and D. This means that the centers of the inner and outer springs 3 at points A, B, C, and D can all reach the gap between the inner and outer grinding wheels 2. Through calculation and graphical analysis, when the design r < 10d, where d is the diameter of the spring 3 wire, the radial movement distance of springs 3 at points A, B, C, and D is not significantly smaller than the radial movement distance and can be ignored. In other words, during the grinding process, besides the inner and outer springs 3 at points A, B, C, and D reaching the gap between the inner and outer grinding wheels 2, the centers of other inner and outer springs 3 can also reach the gap between the inner and outer grinding wheels. Therefore, each spring can move on the inner and outer grinding wheel surfaces, resulting in uniform grinding wheel wear, saving grinding wheel costs, and improving the grinding flatness accuracy. At the same time, the upper and lower end faces of each spring 3 are subjected to grinding forces from the inner and outer grinding wheels 2. The two grinding forces from the inner and outer grinding wheels 2 are in opposite directions, and the lines of action of the forces do not pass through the center of the spring 3. Therefore, after the grinding forces from the upper and lower end faces of each spring 3 are combined, an automatic rotation torque is generated. That is, the spring 3 is being ground in an automatic rotation state, which improves the grinding perpendicularity accuracy.
[0034] The working principle of this application embodiment is as follows: The entire spring 3 is placed between the upper and lower grinding wheel planes (grinding position). Then, the upper grinding wheel feeds downwards, and the spring 3 is ground as the upper and lower grinding wheels rotate. At the same time, the power drives the transmission component to rotate, that is, drives the slider shaft 16 to rotate, thereby driving the slide shaft 24 to rotate around the center line of the slider shaft 16 in a circular motion with a radius of r. At this time, the large hole in the left section of the material tray 5 is between the two surfaces of the upper and lower grinding wheels, and it not only moves left and right, but also swings back and forth (because there is a bearing in the long groove in the middle section of the material tray 5 for control). That is to say, during the grinding process of the spring 3, the spring 3 can move on the inner and outer grinding wheel surfaces, the grinding wheels wear evenly, save grinding wheel costs, and improve the grinding flatness accuracy. At the same time, the upper and lower end faces of each spring 3 are subjected to the grinding forces of the inner and outer grinding wheels. The two grinding forces of the inner and outer grinding wheels are in opposite directions, and the lines of action of the forces do not pass through the center of the spring 3. Therefore, the grinding forces of the upper and lower end faces of each spring 3 combine to generate an automatic rotation torque. That is, the spring 3 is ground in an automatic rotation state at this time, which improves the grinding perpendicularity accuracy.
[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-efficiency grinding mechanism, characterized in that: The assembly includes a housing (12) and an upper grinding wheel, a lower grinding wheel, and a feed tray (4) mounted on the housing (12). The upper and lower grinding wheels are each composed of an inner grinding wheel (1) and an outer grinding wheel (2) of the same width, with the outer grinding wheel (2) fitted over the inner grinding wheel (1). Both the inner grinding wheel (1) and the outer grinding wheel (2) are driven by a transmission mechanism on the housing (12). The inner grinding wheels (1) on the upper and lower grinding wheels rotate in the same direction, while the inner grinding wheels (1) and the outer grinding wheels (2) rotate in opposite directions. The feed tray (4) is rotatably mounted on the housing (12) and is located between the upper and lower grinding wheels. Two rings of placement holes are evenly distributed around the center of the material tray (4). The average radius of the two rings of placement holes is the distance from the gap between the inner and outer grinding wheels (2) to the center of the material tray (4). The spring (3) to be ground is placed in the placement holes. A planar motion mechanism is provided on the housing (12). The planar motion mechanism is used to control the movement of the material tray (4) between the upper and lower grinding wheels. During the grinding process, the rotation center of the spring (3) in the inner and outer ring placement holes will move to the gap between the inner grinding wheel (1) and the outer grinding wheel (2). Under the action of the planar motion mechanism, the material tray (4) not only moves left and right, but also swings back and forth.
2. The high-efficiency grinding mechanism according to claim 1, characterized in that: The planar motion mechanism includes: Holes are provided on the upper and lower plates of the housing (12). A first bearing (15) is installed in two holes, and a slider shaft (16) is installed in the two bearing holes. A round nut 14 is engaged on the outer thread of the lowest section of the slider shaft (16). A transmission component is fixedly connected on the outer circle of the middle section of the slider shaft (16). The slider shaft (16) is driven to rotate by the transmission component. The upper section of the slider shaft (16) is a protrusion with an internal thread hole in the horizontal direction. The lower section of the slide shaft (24) is a concave block. The concave block is fitted over the protrusion of the slider shaft (16). The concave and convex parts form a slider pair. The sliding direction of the slider pair is perpendicular to the rotation axis of the slider seat and the slider shaft (16). An adjusting bolt (18) is set on the right end face of the concave block in the lower section of the slide shaft (24). The material tray seat (5) is provided with a second bearing (22) in each of the upper and lower holes of the support, and a middle section of a slide shaft (24) is provided in the two bearing holes. A round nut 23 is engaged on the uppermost external thread of the slide shaft (24). The right section hole of the material tray seat (5) is fitted on the support of the material tray seat (5) and fixedly connected to the upper end face of the flange of the support of the material tray seat (5). A long groove is provided in the middle section of the material tray seat (5). A third bearing (27) is provided in the long groove. A third bearing (27) support is provided at the bottom of the third bearing (27). The third bearing (27) support is fixedly connected to the upper surface of the angle plate (11). The left side of the angle plate (11) is fixedly connected to the outside of the right plate of the box body (12). The material tray (4) is fixedly connected to the upper end face of the right large hole of the material tray seat (5).
3. The high-efficiency grinding mechanism according to claim 2, characterized in that: The adjusting bolt (18) assembly includes: A head cover (17) is provided on the right end face of the concave block portion of the lower section of the slide shaft (24). The head cover (17) is connected to the concave block by bolts. A hole is provided in the center of the head cover (17), and an adjusting bolt (18) is provided in the hole. The outer circle of the middle section of the adjusting bolt (18) is clearance-fitted with the center hole of the head cover (17). The external thread of the left section of the bolt is engaged with the internal thread of the block portion of the slide shaft (16). A hexagonal nut (20) is engaged on the external thread of the right section of the bolt. The bolt and the hexagonal nut (20) are fixed together by a cylindrical pin (19).
4. The high-efficiency grinding mechanism according to claim 1, characterized in that: A wear-resistant spring (3) sleeve is provided on the inner wall of the placement hole of the material tray (4).
5. The high-efficiency grinding mechanism according to claim 1, characterized in that: The placement hole on the tray (4) is a through hole.
6. The high-efficiency grinding mechanism according to claim 1, characterized in that: The two rings of placement holes have the same number, and the inner ring placement holes and the outer ring placement holes are staggered in the same radial direction.
7. The high-efficiency grinding mechanism according to claim 1, characterized in that: When designing the material tray seat 5, the center of the middle long groove is equidistant from the center of the left large hole and the center of the right hole.