Roller pin grinding mechanism

Abstract

The utility model provides a kind of needle grinding mechanism, including grinding wheel subassembly, guide wheel, upper pressing plate, lower supporting plate, grinding wheel side feed baffle and guide wheel side feed baffle;Upper pressing plate and lower supporting plate are arranged upside down and form the processing channel for needle passing between upper pressing plate and tool bit;Grinding wheel side feed baffle and guide wheel side feed baffle are designed in feed inlet position and form feed chip removal groove.The utility model structure design is reasonable, effectively guide the foreign matter mixed in needle to fall using feed chip removal groove, reduce the wear and tear possibility of foreign matter mixing to grinding wheel and guide wheel;Design processing chip removal groove, in the needle processing process, foreign matter and the waste chip generated by processing then fall along processing chip removal groove, further improve needle grinding efficiency, grinding precision and the service life of grinding mechanism.

Description

Technical Field

[0001] This utility model relates to the field of needle roller manufacturing technology, and in particular to a needle roller grinding mechanism. Background Technology

[0002] In the machining of needle rollers, after the raw materials are formed into the initial shape of needle rollers and burrs are removed through casting, forging, drawing, turning, or rolling, heat treatment, such as quenching and tempering, is usually required to improve the mechanical properties and wear resistance of the needle rollers. Heat treatment places high demands on the process, requiring precise control of parameters such as temperature and time. After heat treatment, the needle rollers need to undergo rough grinding, fine grinding, and final grinding to gradually process the rolling surface of the needle rollers to achieve the required dimensional accuracy and surface roughness. Then, as needed, ultra-precision machining, polishing, cleaning, and drying are performed to complete the machining of the needle rollers.

[0003] In existing heat treatment processes, needle rollers are typically heat-treated using a mesh belt furnace. During this process, they are usually mixed with other products. After heat treatment, the needle rollers need to be sieved out and then ground using a grinding mechanism.

[0004] Existing needle roller grinding mechanisms utilize a grinding wheel and guide wheel. Heat-treated needle rollers enter the gap between the grinding wheel and guide wheel, are ground by the grinding wheel, and then discharged. Due to the small size of the needle rollers, foreign objects are easily mixed in during needle roller screening. If these foreign objects enter the grinding position along with the needle rollers during the feeding process of the grinding mechanism, it will affect the product precision of the needle rollers. Foreign objects entering the grinding wheel can also damage the grinding wheel and guide wheel, affecting the service life of the grinding mechanism and the production quality and efficiency of the needle rollers. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a needle roller grinding mechanism that facilitates the dropping of foreign objects during the feeding process, reduces the mixing of foreign objects during the feeding process, effectively improves grinding efficiency and extends the service life of the grinding mechanism.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a needle roller grinding mechanism, including a grinding wheel assembly, a guide wheel, an upper pressure plate, a lower support plate, a grinding wheel-side feed baffle, and a guide wheel-side feed baffle; the upper pressure plate and the lower support plate are arranged vertically, and a processing channel for the needle roller to pass through is formed between the upper pressure plate and the cutting head; the grinding wheel assembly and the guide wheel are respectively arranged on both sides of the processing channel, the guide wheel abuts against the needle roller, and the outer peripheral surface of the grinding wheel assembly contacts and rubs the outer peripheral surface of the needle roller; the lower support plate has a chip removal groove recessed on the side corresponding to the guide wheel, and along the feeding processing direction, there is a gap between the end faces of both ends of the guide wheel and the groove end faces on the corresponding sides of the chip removal groove. The guide wheel's rotating circumferential surface also has gaps with the side and bottom surfaces of the chip removal groove; a grinding wheel side feed baffle is provided at the side end face of the grinding wheel assembly's feed position, and a guide wheel side feed baffle is provided at the side end face of the guide wheel's feed position. The side of the guide wheel side feed baffle near the needle roller has a Z-shaped structure along the radial section of the needle roller. The Z-shaped structure includes an upper plane, a connecting inclined plane, and a lower plane connected sequentially from top to bottom and from the grinding wheel assembly towards the guide wheel. The upper edge of the connecting inclined plane is located on the side of the needle roller and is obliquely set away from the needle roller. A chip removal groove is formed at the feed inlet position between the needle roller, the connecting inclined plane, the lower plane, and the lower support plate.

[0007] In the above scheme, a feeding processing channel is formed between the grinding wheel assembly and the guide wheel using an upper pressure plate and a lower support plate. The feeding processing direction is the direction of needle roller movement. To address the issue of foreign objects easily getting mixed in during the original feeding process, a grinding wheel-side feeding baffle and a guide wheel-side feeding baffle are designed at the feeding port. A feeding chip removal groove is formed on the guide wheel-side feeding baffle, and a machining chip removal groove is designed on the lower support plate. During feeding, foreign objects can be guided and discharged through the feeding chip removal groove. During processing, foreign objects and processing waste chips are discharged under gravity through the gap between the machining chip removal groove and the guide wheel, reducing the occurrence of foreign objects grinding the grinding wheel and guide wheel along with the needle roller.

[0008] Furthermore, the upper plane of the feed baffle on the side of the needle roller and guide wheel is tangent to the outer circumferential surface of the needle roller, and the lower edge height of the connecting slope is not lower than the lowest point height of the needle roller. Through the height setting, a feed and chip discharge groove for foreign objects to fall is effectively formed below the side of the needle roller.

[0009] Furthermore, the feed side end face of the grinding wheel assembly has a grinding wheel side support rod, and the grinding wheel side feed baffle is positioned and fixed by the grinding wheel side support rod; the feed side end face of the guide wheel has a guide wheel side support rod, and the guide wheel side feed baffle is positioned and fixed by the guide wheel side support rod.

[0010] Furthermore, the grinding wheel assembly includes at least two grinding wheels, with the grinding wheel particle coarseness distributed from coarse to fine along the needle roller feed direction. By setting the grinding wheels with a particle distribution from coarse to fine, a coarse grinding wheel is used at the grinding wheel inlet to remove a larger grinding allowance, while a relatively fine grinding wheel is used at the exit end, which can effectively improve the product surface roughness.

[0011] Along the needle roller feeding direction, the end face of the upper pressure plate on the discharge side is located inside the end face of the grinding wheel on the discharge side, and the end face of the lower support plate on the discharge side is located outside the end face of the grinding wheel on the discharge side. This positioning allows for a positional misalignment between the upper pressure plate and the lower support plate at the inlet position, facilitating the guidance of the needle rollers forward and downward at the discharge position.

[0012] Furthermore, the chip removal groove on the lower support plate has its groove end face on the discharge side of the upper pressure plate located outside the discharge end face of the upper pressure plate. In this way, when the needle rollers enter the processing channel through the outlet position, the waste chips generated during processing can fall from the space formed by the misalignment between the upper pressure plate and the chip removal groove on this side end face, allowing them to be discharged automatically at the foreign matter outlet position.

[0013] Furthermore, the upper surface of the lower support plate on both sides of the chip removal groove is connected to the side near the guide wheel by a guide ramp. The guide ramp guides foreign objects to slide down along it, assisting in chip removal.

[0014] Furthermore, in the radial section of the machining chip removal groove along the needle roller, the side of the groove has an arc-shaped structure, and the lower edge of the arc-shaped structure is the bottom of the machining chip removal groove, which extends to the side of the lower support plate near the guide wheel. The arc-shaped side of the groove can effectively guide chip removal and avoid dead corners in chip falling, thus preventing chip accumulation.

[0015] Preferably, along the feeding and processing direction, the bottom of the chip removal groove gradually decreases in height, thus forming a downwardly inclined guide channel. The chips can slide down along the height difference of the bottom of the chip removal groove and down to the outlet position, further improving the guiding and anti-clogging effect of chip removal.

[0016] The beneficial effects of this utility model are that the needle roller grinding mechanism provided by this utility model, through the cooperation of the upper plate and the lower support plate, provides a processing channel for the needle roller to pass through the grinding wheel and the guide wheel during grinding. The use of the feed chip removal groove effectively guides foreign objects mixed in the needle roller to fall, reducing the possibility of wear on the grinding wheel and guide wheel caused by foreign objects. Simultaneously, the chip removal groove is designed and machined so that foreign objects and processing waste chips fall along the chip removal groove during the needle roller machining process, further improving the needle roller grinding efficiency, grinding accuracy, and service life of the grinding mechanism. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 This is a cross-sectional view of the preferred embodiment of the present invention.

[0021] Figure 4 yes Figure 3 Enlarged diagram of point B in the middle.

[0022] Figure 5 This is a schematic diagram of the preferred embodiment of the present invention after removing the baffle and support rod.

[0023] Figure 6 This is a schematic diagram of the preferred embodiment of the present invention after removing the baffle, support rod and guide wheel.

[0024] Figure 7 This is a side enlarged view of the preferred embodiment of the present invention after removing the grinding wheel assembly, guide wheel, baffle and support rod.

[0025] Figure 8 This is a partial enlarged cross-sectional view of the preferred embodiment of this utility model.

[0026] Figure 9 yes Figure 5 Enlarged diagram of point C in the middle.

[0027] Figure 10 yes Figure 6 Enlarged diagram at point D

[0028] In the figure: 1. Grinding wheel; 2. Upper pressure plate; 3. Needle roller; 4. Lower support plate; 5. Machining chip removal groove; 6. Guide wheel; 7. Machining inclined surface; 8. Guide inclined surface; 9. Grinding wheel feed side baffle; 10. Grinding wheel side support rod; 11. Guide wheel side feed baffle; 12. Guide wheel side support rod; 13. Upper plane; 14. Connecting inclined surface; 15. Lower plane; 16. Feed chip removal groove. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0030] like Figures 1 to 10 The needle roller grinding mechanism shown is the preferred embodiment of this utility model. This needle roller grinding mechanism includes a grinding wheel assembly, a guide wheel 6, an upper pressure plate 2, a lower support plate 4, a grinding wheel side feed baffle 9, and a guide wheel feed side baffle 11. The mechanism includes a frame for positioning and mounting the grinding wheel assembly, guide wheel 6, upper pressure plate 2, and lower support plate 4. The grinding wheel assembly is parallel to the axis of the guide wheel 6 and rotatably mounted on the frame. The frame also needs to be equipped with a power mechanism, such as a motor or reducer, to drive the grinding wheel assembly and guide wheel 6 to rotate. The upper pressure plate 2 and lower support plate 4 are directly fixed to the frame. This part of the structure can be assembled using the frame of an existing grinding wheel grinding mechanism, and will not be described in detail.

[0031] The grinding wheel assembly has a grinding wheel side support rod 10 on its feed side end face. The grinding wheel side feed baffle 9 is positioned and clamped by the grinding wheel side support rod 10, which is also positioned and supported by the frame. The guide wheel 6 has a guide wheel side support rod 12 on its feed side end face. The guide wheel side feed baffle 11 is positioned and clamped by the guide wheel side support rod 12, which is also positioned and supported by the frame.

[0032] Specifically, in this embodiment, the number of grinding wheel assemblies is four, consisting of four grinding wheels 1 with different grit sizes. The grinding wheels 1 have their grit coarseness distributed from coarse to fine along the feeding direction of the needle roller 3. By setting the grinding wheels 1 with a coarser grit distribution, the inlet end of the grinding wheel 1 uses a relatively coarser grit to remove a larger grinding allowance, while the outlet end uses a relatively finer grit grinding wheel 1, which effectively improves the product surface roughness.

[0033] like Figure 5 and Figure 6 As shown, the upper pressure plate 2 and the lower support plate 4 are arranged vertically, located between the grinding wheel assembly and the guide wheel 6. A machining channel is formed between the upper pressure plate 2 and the lower support plate 4 for the needle roller 3 to pass through. The upper end face of the lower support plate 4 is a machining slope 7, which connects the grinding wheel side face and the guide wheel side face of the lower support plate 4. Along the direction from the grinding wheel assembly to the guide wheel 6, the machining slope 7 slopes downwards from high to low. During the grinding operation, the needle roller 3 passes through the machining channel from front to back. During this process, the guide wheel 6 abuts against the needle roller 3, and the outer circumferential surface of the grinding wheel assembly contacts and rubs against the outer circumferential surface of the needle roller 3. The arrangement of the upper pressure plate 2 and the lower support plate 4 not only forms a machining channel for the needle roller 3 to pass through, but also provides blocking and limiting in the vertical direction for the needle roller 3 during movement and machining, reducing the jumping of the needle roller 3 during grinding and affecting the grinding operation.

[0034] Based on the above needle roller action 3, it is necessary to achieve the effects of foreign object discharge and processing waste chip discharge.

[0035] like Figure 2 and Figure 4 As shown, in this embodiment, a grinding wheel-side feed baffle 9 and a guide wheel-side feed baffle 11 are designed at the feed inlet. Specifically, a grinding wheel-side feed baffle 9 is provided on the side end face of the grinding wheel assembly feed position, and a guide wheel-side feed baffle 11 is provided on the side end face of the guide wheel 6 feed position.

[0036] The feed baffle 11 on the guide wheel side has a Z-shaped structure along the radial section of the needle roller near the needle roller. The Z-shaped structure includes an upper plane 13, a connecting slope 14, and a lower plane 15 connected sequentially from top to bottom and from left to right (from the grinding wheel assembly to the guide wheel 6). The upper edge of the connecting slope 14 is located on the side of the needle roller 3 and is set obliquely away from the needle roller 3. The upper plane 13 is tangent to the outer peripheral surface of the needle roller 3, and the height of the lower edge of the connecting slope 14 is not lower than the height of the lowest point of the needle roller 3. A feed and chip removal groove 16 is formed at the feed inlet position between the needle roller 3, the connecting slope 14, the lower plane 15, and the lower support plate 4. Through the height setting, a feed and chip removal groove 16 for foreign objects to fall is effectively formed below the side of the needle roller 3. Thus, when the needle roller 3 is fed, a feed chip removal groove 16 is formed on the lower right side of the needle roller 3. Foreign matter mixed in the needle roller 3 can be directly discharged from the feed chip removal groove 16. The connecting inclined surface 14 plays the role of blocking foreign matter and guiding foreign matter downward, reducing the situation where foreign matter continues to enter the processing channel with the needle roller 3.

[0037] The lower support plate 4 has a recessed chip removal groove 5 on the side corresponding to the guide roller 6. Along the feeding direction (i.e., the direction of movement of the needle roller 3), there are gaps between the end faces of both ends of the guide roller 6 and the corresponding end faces of the chip removal groove 5, and there are also gaps between the rotating circumferential surface of the guide roller 6 and the side and bottom surfaces of the chip removal groove 5. Each gap allows foreign objects and machining waste to enter the chip removal groove 5 and be discharged along the chip removal groove 5.

[0038] Specifically, such as Figure 6 and Figure 7 As shown, along the feeding direction of the needle roller 3 ( Figure 7 (From left to right) The discharge side end face of the upper pressure plate 2 is located inside the discharge side end face of the grinding wheel 1, and the discharge side end face of the lower support plate 4 is located outside the discharge side end face of the grinding wheel 1. This positioning creates a misalignment between the upper pressure plate 2 and the lower support plate 4 at the outlet position, facilitating the guidance of machining waste from the chip removal groove at the discharge position and preventing blockage. Furthermore, the chip removal groove 5 on the lower support plate 4 has its groove end face corresponding to the discharge side end face of the upper pressure plate 2 located outside the discharge side end face of the upper pressure plate 2. Thus, when the needle rollers 3 are processed and then discharged, the machining waste can fall from the space created by the misalignment between the upper pressure plate 2 and the chip removal groove 5 on this side, effectively preventing blockage at the discharge side.

[0039] like Figure 5 and Figure 6 As shown, the upper surfaces of the lower support plates 4 on both sides of the chip removal groove 5 are connected to the side surfaces near the guide rollers 6 by guide ramps 8. The guide ramps 8 guide foreign objects to slide down along them, assisting in chip removal.

[0040] To optimize the process of foreign objects entering and being discharged from the chip removal groove 5, the chip removal groove 5 has an arc-shaped structure on its side along the radial section of the needle roller 3, and the lower edge of the arc-shaped structure is the bottom of the chip removal groove 5. This bottom extends to the side of the lower support plate 4 near the guide wheel 6. In this embodiment, the bottom of the chip removal groove 5 is actually a linear structure located on the side of the lower support plate 4. That is, when the chip removal groove 5 is formed in this embodiment, an arc surface is cut out on the side of the lower support plate 4. This arc surface is the side of the chip removal groove 5. There is no place at the bottom for chips to accumulate. The falling chips can directly fall down along the arc surface of the chip removal groove 5. The arc-shaped side of the groove can effectively guide the chips and avoid dead corners that cause accumulation.

[0041] like Figure 7 As shown, in order to further guide the material drop direction of the chip removal groove 5 at the bottom of the groove, the bottom of the chip removal groove 5 gradually decreases in height along the feeding direction. In this way, a downward-sloping guide channel is formed at the bottom of the chip removal groove 5. The chips can slide down along the height difference of the bottom of the chip removal groove 5 and down to the outlet position, which further improves the guiding and anti-clogging effect of chip removal. Whether it is foreign matter mixed in during the feeding process of the needle roller 3 or grinding waste and chips generated during the grinding process of the needle roller 3, they can all fall smoothly along the chip removal groove 5. There are no dead corners in the falling process, and it is not easy to cause blockage.

[0042] This needle roller grinding mechanism addresses the issue of foreign matter easily getting mixed in during the original feeding process. Through the cooperation of the upper plate and lower support plate 4, a processing channel is provided for the needle roller 3 to pass between the grinding wheel 1 and the guide wheel 6. A feed chip removal groove 16 is formed at the feed inlet, which effectively guides foreign matter mixed in the needle rollers to fall, reducing the possibility of wear on the grinding wheel and guide wheel caused by foreign matter contamination. Simultaneously, a chip removal groove 5 is machined on the lower support plate 4. During processing, the needle roller 3 can smoothly pass through the top of the lower support plate 4, and foreign matter and processing waste chips can be discharged under gravity through the gap between the chip removal groove 5 and the guide wheel 6. This further reduces the occurrence of foreign matter grinding the grinding wheel 1 and guide wheel 6 along with the needle roller 3, further improving the grinding efficiency, grinding accuracy, and service life of the grinding mechanism.

[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A needle roller grinding mechanism, characterized in that: Includes grinding wheel assembly, guide wheel, upper pressure plate, lower support plate, grinding wheel side feed baffle and guide wheel side feed baffle; The upper pressure plate and the lower support plate are arranged vertically, and a processing channel for the needle roller to pass through is formed between the upper pressure plate and the cutter head; The grinding wheel assembly and guide wheel are respectively located on both sides of the processing channel. The guide wheel abuts against the needle roller, and the outer peripheral surface of the grinding wheel assembly contacts and rubs against the outer peripheral surface of the needle roller. The lower support plate has a chip removal groove recessed on the side of the guide wheel. Along the feeding direction, there is a gap between the end faces of both ends of the guide wheel and the groove end faces on the corresponding sides of the chip removal groove. There are also gaps between the rotating circumferential surface of the guide wheel and the side and bottom surfaces of the chip removal groove. The grinding wheel assembly has a grinding wheel side feed baffle at the side end face of the feed position, and the guide wheel feed baffle has a guide wheel side feed baffle at the side end face of the feed position. The side of the guide wheel side feed baffle near the needle roller has a Z-shaped structure along the radial section of the needle roller. The Z-shaped structure includes an upper plane, a connecting inclined plane, and a lower plane connected sequentially from top to bottom and from the grinding wheel assembly to the guide wheel. The upper edge of the connecting inclined plane is located on the side of the needle roller and is set obliquely away from the needle roller. The aforementioned needle roller, connecting inclined surface, lower plane, and lower support plate form a feeding and chip removal groove at the feed inlet.

2. The needle roller grinding mechanism as described in claim 1, characterized in that: The upper plane is tangent to the outer circumferential surface of the needle roller, and the lower edge of the connecting slope is not lower than the height of the lowest point of the needle roller.

3. The needle roller grinding mechanism as described in claim 1, characterized in that: The grinding wheel assembly has a grinding wheel side support rod on the feed side end face, and the grinding wheel side feed baffle is positioned and fixed by the grinding wheel side support rod; The feed side end face of the guide wheel has a guide wheel side support rod, and the feed baffle on the guide wheel side is positioned and fixed by the guide wheel side support rod.

4. The needle roller grinding mechanism as described in claim 1, characterized in that: The grinding wheel assembly includes at least two grinding wheels, and the grinding wheel particles are distributed from coarse to fine along the needle roller feed direction.

5. The needle roller grinding mechanism as described in claim 1, characterized in that: Along the needle roller feeding direction, the end face of the upper pressure plate on the discharge side is located inside the end face of the grinding wheel on the feed side, and the end face of the lower support plate on the discharge side is located outside the end face of the grinding wheel on the feed side.

6. The needle roller grinding mechanism as described in claim 4, characterized in that: The chip removal groove on the lower support plate is located on the outer side of the discharge side end face of the upper pressure plate, corresponding to the groove end face of the upper pressure plate.

7. The needle roller grinding mechanism as described in claim 1, characterized in that: The upper surface of the lower support plate on both sides of the chip removal groove is connected to the side near the guide wheel by a guide slope.

8. The needle roller grinding mechanism as described in claim 1, characterized in that: In the radial section of the machining chip removal groove, the side of the groove is an arc-shaped structure, and the lower edge of the arc-shaped structure is the bottom of the machining chip removal groove, which extends to the side of the lower support plate near the guide wheel.

9. The needle roller grinding mechanism as described in claim 7, characterized in that: Along the feeding direction, the bottom of the chip removal groove gradually decreases in height.

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