Internal cooling grinding wheel

Abstract

The internal cooling grinding wheel comprises a grinding wheel body, a heat dissipation cavity is formed in the lower portion of the grinding wheel body, a mandrel with the bottom end extending to the heat dissipation cavity is arranged in the middle of the grinding wheel body in a penetrating mode, a plurality of liquid storage cavities used for storing cooling liquid are evenly distributed in the upper portion of the grinding wheel body in the circumferential direction, and each liquid storage cavity is provided with a liquid drainage channel extending to the bottom of the grinding wheel; a sealing cover is arranged at the top of the grinding wheel body; an annular pipe is arranged on the sealing cover, a liquid injection hole is formed in the top of the annular pipe, and a plurality of liquid outlets are formed in the bottom of the annular pipe; a plurality of air inlets are further formed in the sealing cover; a self-sealing assembly aiming at the liquid discharge channel is arranged in the liquid storage cavity; a plurality of grinding strips corresponding to the liquid drainage channels are arranged at the bottom of the grinding wheel body, and a welding layer is arranged between the grinding strips and the grinding wheel body. According to the internal cooling grinding wheel, the structural design of the internal cooling grinding wheel facilitates injection of cooling liquid into the surface of a workpiece for cooling in the workpiece grinding process, and then the grinding effect and the grinding efficiency are guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of grinding processing, and particularly relates to an internal cooling grinding wheel. BACKGROUND

[0002] In mechanical processing, grinding processing is one of the most widely used material removal methods and belongs to finishing. In the grinding processing, excessive grinding heat is generated, and cooling liquid is difficult to enter the grinding area for effective cooling due to the fact that the grinding area is a closed area, so that the local temperature of the grinding area is high, and the workpiece surface is prone to grinding burn and grinding crack during the grinding process, so that the processing quality of the part is difficult to guarantee. Therefore, how to reduce the grinding temperature and prevent or reduce the thermal damage of the workpiece surface has been one of the difficult problems to be solved in the grinding process.

[0003] In view of the above problems, a new grinding wheel is provided to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide an internal cooling grinding wheel to solve the problems of the prior art. An internal cooling grinding wheel comprises a grinding wheel body, a heat dissipation cavity is arranged at the lower part of the grinding wheel body, a mandrel extending to the heat dissipation cavity is arranged at the middle part of the grinding wheel body, a plurality of liquid storage cavities for storing cooling liquid are uniformly arranged at the upper part of the grinding wheel body in the circumferential direction, the liquid storage cavities are provided with liquid discharge channels extending to the bottom of the grinding wheel, a sealing cover is arranged at the top of the grinding wheel body, the sealing cover and the grinding wheel body are fixedly connected through bolts, an annular pipe is arranged on the sealing cover, an injection hole is arranged at the top of the annular pipe, a sealing cover is screwed at the injection hole, a plurality of liquid discharge ports corresponding to the liquid storage cavities are arranged at the bottom of the annular pipe, a plurality of air inlet ports corresponding to the liquid storage cavities are arranged on the sealing cover, one-way valves are arranged at the air inlet ports, a self-sealing assembly corresponding to the liquid discharge channels is arranged in the liquid storage cavities, a plurality of grinding strips corresponding to the liquid discharge channels are arranged at the bottom of the grinding wheel body, and the grinding strips and the grinding wheel body are welded.

[0005] Based on the above, the self-sealing assembly comprises a sealing block arranged in the liquid storage cavity, a guide hole is arranged on the sealing block, an elastic push rod for applying downward force to the sealing block is arranged on the sealing cover, a guide rod corresponding to the guide hole is fixedly arranged on the sealing cover, a contact block corresponding to the sealing block is slidably arranged in the liquid storage cavity, the contact block and the sealing block are provided with inclined surfaces matched with each other, a guide groove is arranged at the top of the contact block, and a guide frame corresponding to the guide groove is fixedly arranged on the side wall of the liquid storage cavity.

[0006] Based on the above, the sealing assembly is arranged on the grinding wheel body corresponding to each of the drainage channels, the sealing assembly comprises a limiting groove arranged around the drainage channel, a conical sealing body arranged in the limiting groove and directed to the drainage channel, a positioning plate arranged around the conical sealing body and sliding up and down on the inner wall of the limiting groove, and a contact ball connected to the bottom of the conical sealing body through a connecting rod.

[0007] Based on the above, the height of the contact ball protruding downward from the grinding strip is less than the radius of the contact ball in the state of blocking the drainage channel.

[0008] Based on the above, the lower part of the mandrel is a hollow structure extending upward from the bottom end, and the side wall of the mandrel is provided with a plurality of air inlet holes communicating with the hollow structure.

[0009] Based on the above, a plurality of fan blades are arranged in the heat dissipation cavity.

[0010] Based on the above, the grinding strip is arc-shaped, and the grinding strip is provided with a chip removal groove.

[0011] Based on the above, two annular sealing grooves are arranged on the grinding wheel body, and the bottom of the cover plate is provided with two sealing rings made of rubber.

[0012] The present application has the following advantages compared with the prior art: 1. The internal cooling grinding wheel provided by the present application facilitates the injection of cooling liquid onto the surface of the workpiece during grinding to cool and cool the workpiece, and facilitates the introduction of external airflow into the grinding area of the workpiece to accelerate cooling of the surface of the workpiece, prevent thermal damage to the workpiece, and thus ensure grinding effect and grinding efficiency.

[0013] 2. In the present application, the structure of the grinding strip not only facilitates grinding of the surface of the workpiece, but also facilitates timely removal of the debris generated during grinding, the heat generated during grinding and the waste liquid generated during grinding, thereby ensuring processing efficiency.

[0014] 3. In the present application, the ingenious structure of the self-sealing assembly facilitates the movement of the contact block to the sealing block by centrifugal force when the grinding wheel rotates, thereby lifting the sealing block upward and opening the port of the drainage channel, so that the cooling liquid can enter the drainage channel. When the grinding wheel does not rotate, the sealing block closes the port of the drainage channel under the action of the elastic push rod. In addition, the structure of the sealing assembly can ensure that the cooling liquid is only discharged when the workpiece is being ground, thereby avoiding waste of the cooling liquid. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 yes Figure 1 Schematic diagram of the structure at point B; Figure 4 This is a top view of the contact block in this invention; Figure 5 This is a bottom view of the structural components in this invention. Figure 6 This is a cross-sectional view of the grinding bar in this invention; Figure 7 This is the front view of the present invention; In the diagram: 1. Grinding wheel body; 1-1. Heat dissipation cavity; 2. Liquid storage cavity; 3. Cover plate; 4. Bolt; 5. Sealing ring; 6. Mandrel; 6-1. Air inlet; 7. Annular tube; 7-1. Liquid injection hole; 8. Air inlet; 9. Sealing block; 10. Guide rod; 11. Elastic push rod; 12. Abutting block; 12-1. Guide groove; 13. Guide frame; 14. Drainage channel; 14-1. Limiting groove; 15. Fan blade; 17. Conical sealing body; 18. Connecting rod; 19. Abutting ball; 20. Welding layer; 21. Grinding bar; 21-1. Chip removal groove. Detailed Implementation

[0016] The technical solution of the present invention will be further described in detail below through specific embodiments. Example

[0017] like Figures 1-7 As shown, the present invention provides an internally cooled grinding wheel, comprising a grinding wheel body 1, a heat dissipation cavity 1-1 at the lower part of the grinding wheel body 1, a mandrel 6 extending from the bottom end to the heat dissipation cavity 1-1 through the middle of the grinding wheel body 1, and a plurality of liquid storage cavities 2 for storing coolant evenly distributed circumferentially at the upper part of the grinding wheel body 1, each liquid storage cavity 2 having a drain channel 14 extending to the bottom of the grinding wheel; a sealing cover is provided at the top of the grinding wheel body 1, and the sealing cover and the grinding wheel body 1 are fixedly connected by bolts 4; an annular tube 7 is provided on the sealing cover, the annular tube 7... The top of the annular tube 7 is provided with a liquid injection hole 7-1, and a sealing cap is screwed onto the liquid injection hole 7-1. The bottom of the annular tube 7 is provided with multiple drain ports corresponding to multiple liquid storage chambers 2. The sealing cap is also provided with multiple air inlets 8 corresponding to multiple liquid storage chambers 2, and a one-way valve is provided at each air inlet 8. The liquid storage chamber 2 is provided with a self-sealing component for the drain channel 14. The bottom of the grinding wheel body 1 is provided with multiple grinding strips 21 corresponding to multiple drain channels 14, and a welded layer 20 is formed between the grinding strips 21 and the grinding wheel body 1.

[0018] The self-sealing assembly is used to control the cooling liquid to enter the liquid discharge channel 14 only when the grinding wheel rotates, which comprises a sealing block 9 arranged in the liquid storage cavity 2, the sealing block 9 is provided with a guide hole, the sealing cover is provided with an elastic push rod 11 for applying a downward thrust to the sealing block 9, and the sealing cover is further fixedly provided with a guide rod 10 corresponding to the guide hole; the liquid storage cavity 2 is further slidably provided with a contact block 12 corresponding to the sealing block 9, the contact block 12 and the sealing block 9 are provided with inclined surfaces matched with each other, the top of the contact block 12 is provided with a guide groove 12-1, and the side wall of the liquid storage cavity 2 is fixedly provided with a guide frame 13 corresponding to the guide groove 12-1.

[0019] Considering that the grinding wheel needs to be lifted sometimes in the rotating state, in order to avoid waste caused by the outflow of the cooling liquid from the liquid discharge channel 14, a sealing assembly is arranged on the grinding wheel body 1 corresponding to each of the liquid discharge channels 14, which comprises a limiting groove 14-1 arranged around the liquid discharge channel 14, a conical sealing body 17 corresponding to the liquid discharge channel 14 is arranged in the limiting groove 14-1, a positioning plate is arranged around the conical sealing body 17 and slides up and down on the inner wall of the limiting groove 14-1, and the bottom of the conical sealing body 17 is connected with a contact ball 19 through a connecting rod 18.

[0020] It should be noted that the height of the contact ball 19 protruding downward from the grinding strip 21 is less than the radius of the contact ball 19 in the state of blocking the liquid discharge channel 14, and this structure design can avoid damage to the contact ball 19 due to the failure to move upward in time when grinding a workpiece with a uneven surface.

[0021] In order to improve the heat dissipation efficiency of the grinding area, the lower part of the above-mentioned mandrel 6 is a hollow structure extending upward from the bottom end, and the side wall of the mandrel 6 is provided with a plurality of air inlet holes 6-1 communicating with the hollow structure.

[0022] In order to further ensure the heat dissipation efficiency of the grinding area, a plurality of fan leaves 15 are arranged in the heat dissipation cavity 1-1.

[0023] It should be noted that the above-mentioned grinding strip 21 is arc-shaped, and the grinding strip 21 is provided with a chip removal groove 21-1, and the chip removal groove 21-1 is located on the back of the grinding strip 21, and the direction of the back is also the direction of rotation of the grinding wheel.

[0024] In order to ensure the sealing between the grinding wheel body 1 and the sealing cover, two annular sealing grooves are arranged on the grinding wheel body 1, and the bottom of the cover plate 3 is provided with two sealing rings 5 made of rubber material.

[0025] The specific working principle of the application is as follows: when the grinding wheel is used, firstly, an appropriate amount of cooling liquid is injected into the liquid storage cavity 2 through the liquid injection hole 7-1, and then the mandrel 6 of the grinding wheel is fixedly connected with the power output end of the driving motor on the grinding machine. When the grinding wheel rotates, under the action of centrifugal force, the contact block 12 moves to the sealing block 9 by using the centrifugal force, and then the sealing block 9 is lifted upward, so that the port of the liquid discharge channel 14 is opened, and the cooling liquid can enter the liquid discharge channel 14; when the grinding wheel does not rotate, under the action of the elastic push rod 11, the sealing block 9 closes the port of the liquid discharge channel 14; in addition, the structural design of the sealing assembly can ensure that the cooling liquid can only be discharged when the workpiece is ground, that is, the grinding strip 21 is in contact with the surface of the workpiece, and the contact ball 19 is lifted upward, so as to avoid the waste of the cooling liquid.

[0026] In addition, it should be noted that when the grinding wheel rotates, under the action of the fan blade 15, the external airflow enters the hollow structure of the mandrel 6 from the air inlet hole 6-1, and then enters the heat dissipation cavity 1-1 to blow the grinding surface, and finally the heat is discharged to the surrounding.

[0027] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the application and not to limit them; although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the application, they should be covered in the technical solution range of the application claimed in the application.

Claims

1. An internally cooled grinding wheel, characterized by: The grinding wheel body (1) is provided with a heat dissipation cavity (1-1) at the lower part, a mandrel (6) extending to the heat dissipation cavity (1-1) at the middle part, and a plurality of liquid storage cavities (2) for storing cooling liquid at the upper part; the top of the grinding wheel body (1) is provided with a sealing cover, and the sealing cover and the grinding wheel body (1) are fixedly connected by bolts (4); the sealing cover is provided with an annular pipe (7), the top of the annular pipe (7) is provided with a liquid injection hole (7-1), the liquid injection hole (7-1) is screwed with a sealing cover, and the bottom of the annular pipe (7) is provided with a plurality of liquid discharge ports corresponding to the plurality of liquid storage cavities (2); the sealing cover is also provided with a plurality of air inlets (8) corresponding to the plurality of liquid storage cavities (2), and the air inlets (8) are provided with one-way valves; the liquid storage cavities (2) are provided with a self-sealing assembly corresponding to the liquid discharge channels (14); the bottom of the grinding wheel body (1) is provided with a plurality of grinding strips (21) corresponding to the plurality of liquid discharge channels (14), and the grinding strips (21) and the grinding wheel body (1) are welded together.

2. The inner cooled grinding wheel according to claim 1, characterized in that: The self-sealing assembly comprises a sealing block (9) arranged in the liquid storage cavity (2), the sealing block (9) is provided with a guide hole, the sealing cover is provided with an elastic push rod (11) for applying a downward force to the sealing block (9), and the sealing cover is also fixedly provided with a guide rod (10) corresponding to the guide hole; the liquid storage cavity (2) is also provided with a contact block (12) corresponding to the sealing block (9), and the contact block (12) and the sealing block (9) are provided with inclined surfaces matched with each other, the top of the contact block (12) is provided with a guide groove (12-1), and the side wall of the liquid storage cavity (2) is fixedly provided with a guide frame (13) corresponding to the guide groove (12-1).

3. The inner cooled grinding wheel of claim 1, wherein: The grinding wheel body (1) is provided with a sealing assembly corresponding to each of the liquid discharge channels (14), the sealing assembly comprises a limiting groove (14-1) arranged around the liquid discharge channel (14), the limiting groove (14-1) is provided with a conical sealing body (17) corresponding to the liquid discharge channel (14), the conical sealing body (17) is provided with a positioning plate sliding up and down on the inner wall of the limiting groove (14-1), and the bottom of the conical sealing body (17) is connected with a contact ball (19) through a connecting rod (18).

4. The inner cooled grinding wheel according to claim 3, characterized in that: In the state of blocking the liquid discharge channel (14), the height of the contact ball (19) protruding downward from the grinding strip (21) is less than the radius of the contact ball (19).

5. The inner cooled grinding wheel of claim 1, wherein: The lower part of the mandrel (6) is a hollow structure extending upward from the bottom end, and the side wall of the mandrel (6) is provided with a plurality of air inlet holes (6-1) communicating with the hollow structure.

6. The inner cooled grinding wheel according to claim 5, characterized in that: The heat dissipation cavity (1-1) is provided with a plurality of fan blades (15).

7. The inner cooled grinding wheel of claim 1, wherein: The grinding strip (21) is arc-shaped, and the grinding strip (21) is provided with a chip removal groove (21-1).

8. The inner cooled grinding wheel of claim 1, wherein: The sand wheel body (1) is provided with two annular sealing grooves, and the bottom of the cover plate (3) is provided with two sealing rings (5) made of rubber.

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