Tool-cooling mechanism

Abstract

A tool-cooling mechanism includes a grinding tool. The grinding tool is provided with a converging disc, and the converging disc rotates with the grinding tool to draw external cooling water into the grinding tool for convergence, and then radially conveys the cooling water as converged toward an inner wall of the grinding tool, such that the cooling water can flow to a grinding surface along the inner wall of the grinding tool. The cooling water is allowed to enter via a water inlet and cool the grinding surface smoothly even when the grinding tool is rotating at a high speed, such that the cooling water can be prevented from passing through the grinding tool axially and failing to cool the grinding surface. In addition, the grinding surface is cooled after the cooling water as dispersed and atomized by the rotation of the grinding tool is converged.

What is claimed is: 
     
         1 . A tool-cooling mechanism, comprising: a grinding tool, wherein the grinding tool is internally provided with a converging disc, and the converging disc rotates with the grinding tool to draw external cooling water into the grinding tool for convergence, and then radially conveys the cooling water as converged toward an inner wall of the grinding tool, wherein the cooling water flows to a grinding surface along the inner wall of the grinding tool. 
     
     
         2 . The tool-cooling mechanism according to  claim 1 , wherein a top of the grinding tool is provided with a water inlet for pouring the cooling water in the grinding tool, and the converging disc is fixed within the grinding tool at a corresponding position below the water inlet. 
     
     
         3 . The tool-cooling mechanism according to  claim 2 , further comprising: a plurality of blades, wherein the plurality of blades are distributed on the converging disc and form a vortex with rotation of the grinding tool, wherein the vortex draws the external cooling water into the grinding tool. 
     
     
         4 . The tool-cooling mechanism according to  claim 3 , wherein the plurality of blades are distributed around an outer periphery of a top of the converging disc. 
     
     
         5 . The tool-cooling mechanism according to  claim 4 , further comprising: fastening bolts for fastening the plurality of blades and the converging disc at corresponding positions within the grinding tool, wherein the fastening bolts are provided in correspondence with the plurality of blades one by one; and
 the fastening bolts sequentially pass from top to bottom through a sidewall of the top of the grinding tool corresponding to an outer periphery of the water inlet, the corresponding blades, and the converging disc.   
     
     
         6 . The tool-cooling mechanism according to  claim 2 , wherein an outer peripheral edge of the converging disc extends outwardly to a position close adjacent to the inner wall of the grinding tool, wherein a guiding gap is formed between the converging disc and the inner wall of the grinding tool to restrict the cooling water from flowing downward along the inner wall of the grinding tool. 
     
     
         7 . The tool-cooling mechanism according to  claim 2 , wherein the converging disc is provided coaxially with the water inlet, a radial dimension of the converging disc is greater than a radial dimension of the water inlet, and a water storing area for storing the cooling water temporarily is formed between the converging disc and the sidewall of the top of the grinding tool corresponding to the outer periphery of the water inlet. 
     
     
         8 . The tool-cooling mechanism according to  claim 3 , wherein the plurality of blades are all provided spirally in a same spiral direction. 
     
     
         9 . The tool-cooling mechanism according to  claim 2 , wherein a top of the converging disc is provided with a connecting structure, and the connecting structure passes upwards through the water inlet along an axial direction of the grinding tool and connects to grinding equipment. 
     
     
         10 . The tool-cooling mechanism according to  claim 1 , further comprising: a plurality of blades, wherein an open area is provided in a middle portion of the grinding tool, and an equipment hole is provided in a center of a bottom surface of the grinding tool for connecting to external equipment;
 an annular end surface of an outer periphery of the grinding tool is the grinding surface;   the converging disc is provided in the open area of the grinding tool and is removably connected to the bottom surface of the grinding tool;   the converging disc comprises a first disc body and a water inlet hole, wherein the water inlet hole allows the cooling water to enter the grinding tool;   an outer edge of the first disc body extends to an intersection between a sidewall and the bottom surface of the grinding tool;   the water inlet hole is provided at a center of the first disc body and is coaxial with the equipment hole, and the first disc body is inclined in a direction from the water inlet hole to the intersection between the sidewall and the bottom surface of the grinding tool to form an annular inclined surface;   a gap allowing the cooling water to pass through is arranged between the outer edge of the first disc body and the sidewall and the bottom surface of the grinding tool; and   the several plurality of blades are disposed between the first disc body and the bottom surface of the grinding tool and are arranged at intervals on the first disc body along a circumferential direction, and the plurality of blades divide the gap into a plurality of converging channels.   
     
     
         11 . The tool-cooling mechanism according to  claim 10 , wherein the plurality of blades respectively extend radially in a direction from the water inlet hole to the outer edge of the first disc body and are formed integrally with the first disc body. 
     
     
         12 . The tool-cooling mechanism according to  claim 10 , wherein extending lines of the plurality of blades do not pass through a center point of the first disc body, and form a vortex shape. 
     
     
         13 . The tool-cooling mechanism according to  claim 10 , further comprising: an airflow stopping collar, wherein the airflow stopping collar encircles an outer edge of an upper surface of the first disc body, and an airflow isolating channel for isolating airflow is formed between the airflow stopping collar and the inner wall of the grinding tool. 
     
     
         14 . The tool-cooling mechanism according to  claim 13 , wherein the airflow stopping collar is parallel to the sidewall of the grinding tool and extends from the sidewall towards the bottom surface. 
     
     
         15 . The tool-cooling mechanism according to  claim 13 , wherein the airflow stopping collar is inclined from outside to inside in a direction from the sidewall to the bottom surface of the grinding tool. 
     
     
         16 . The tool-cooling mechanism according to  claim 10 , further comprising: a circular connecting disc, wherein a connecting hole is provided in a center of the circular connecting disc for connecting the external equipment, and the connecting hole is provided coaxially with the equipment hole;
 a bottom surface of each of the plurality of blades is provided with a notch, and the notch extends outward from an inner sidewall of each of the plurality of blades to a position adjacent to an outer sidewall of each of the plurality of blades and forms a circular groove along a circumferential direction; and   the connecting disc is placed inside the circular groove.   
     
     
         17 . The tool-cooling mechanism according to  claim 16 , further comprising: a main spindle screw, wherein the main spindle screw sequentially passes through the connecting hole of the connecting disc and the equipment hole of the grinding tool and is threaded to a main spindle of the external equipment. 
     
     
         18 . The tool-cooling mechanism according to any one of  claims 10 - 17 , further comprising: a blade connecting bolt, wherein the first disc body is provided with a blade screw hole at a position corresponding to each of the plurality of blades, the grinding tool has a screw slot at a position corresponding to the blade screw hole, and an internal thread is provided in the screw slot, wherein the blade connecting bolt passes through the blade screw hole and is threaded into the screw slot to connect the grinding tool and converging disc as one. 
     
     
         19 . The tool-cooling mechanism according to  claim 1 , further comprising: a plurality of impellers, wherein an open area is provided in a bottom end of the grinding tool, and a surface encircling an outer edge of the bottom end of the grinding tool is the grinding surface;
 a connecting block having a cylindrical shape is provided at a center of a top end of the grinding tool;   an annular hollowed-out area encircling the connecting block is provided at the top end of the grinding tool; and   the plurality of impellers are placed within the annular hollowed-out area, the plurality of impellers are connected transversely between the connecting block and an outer edge of the top end of the grinding tool, and the plurality of impellers are distributed at intervals along a circumferential direction of the connecting block;   the converging disc is provided in the open area of the grinding tool, and the converging disc comprises a connecting post and a second disc body, wherein the connecting post and the second disc body are coaxial with the connecting block, wherein the connecting post is formed as a hollow cylinder with an open lower end, and the connecting post has an upper end removably connected to a bottom surface of the connecting block;   the second disc body encircles an outer periphery of the connecting post;   an inner edge of the second disc body is integrally formed with an outer wall of a bottom end of the connecting post, and an outer edge of the second disc body extends to a sidewall of the grinding tool to form an annular surface structure; and   a gap allowing the cooling water to pass through is arranged between the outer edge of the second disc body and the sidewall and a bottom surface of the grinding tool.   
     
     
         20 . The tool-cooling mechanism according to  claim 19 , wherein the outer edge of the second disc body extends horizontally to the sidewall of the grinding tool and is formed as an annular plane. 
     
     
         21 . The tool-cooling mechanism according to  claim 19 , wherein the outer edge of the second disc body extends to an intersection between the sidewall and the bottom surface of the grinding tool, and the second disc body is inclined upward in a direction from the connecting post to the intersection between the sidewall and the bottom surface of the grinding tool, and is formed as an annular inclined surface. 
     
     
         22 . The tool-cooling mechanism according to any one of  claims 19 - 21 , wherein the converging disc further comprises an airflow stopping ring, wherein the airflow stopping ring encircles the outer edge of the second disc body, and an airflow isolating channel for isolating airflow is formed between the airflow stopping ring and the inner wall of the grinding tool. 
     
     
         23 . The tool-cooling mechanism according to  claim 22 , wherein the airflow stopping ring is parallel to the sidewall of the grinding tool and extends from the sidewall towards the bottom surface. 
     
     
         24 . The tool-cooling mechanism according to  claim 22 , wherein the airflow stopping ring is inclined from top to bottom in a direction approaching the sidewall of the grinding tool. 
     
     
         25 . The tool-cooling mechanism according to  claim 19 , further comprising: a plurality of blades between the second disc body of the converging disc and a top surface of the grinding tool, wherein the plurality of blades are arranged at intervals on the second disc body in a circumferential direction, and the plurality of blades divide the gap between the second disc body and the grinding tool into a plurality of converging channels. 
     
     
         26 . The tool-cooling mechanism according to any one of  claims 19 - 21  and  23 - 25 , further comprising: a main spindle connecting bolt, wherein
 a first main spindle screw hole and a second main spindle screw hole are provided coaxially at a top end of the connecting block and at a center of the connecting post, respectively; and 
 the main spindle connecting bolt sequentially passes from bottom to top through the second main spindle screw hole and the first main spindle screw hole and is threaded to a main spindle of external equipment, wherein the converging disc and the grinding tool are locked to the external equipment. 
 
     
     
         27 . The tool-cooling mechanism according to any one of  claims 1 - 17  and  19 - 25 , wherein the grinding tool is a trepanning drill, a cup grinding wheel, a disc grinding wheel or an annular grinding disc.