Edging method and apparatus

Abstract

An edging method is provided, comprising: providing an edging apparatus comprising at least one sensor configured to detect a distance from the sensor to the edge to be ground; providing a workpiece having an edge to be ground; setting a base value of the distance; detecting a variation value, the variation value is a difference between a present distance from the sensor to the edge to be ground during grinding and the base value; and regulating a grinding feed amount of the edging apparatus according to the variation value. An edging apparatus is further provided.

What is claimed is: 
     
         1 . An edging method, comprising:
 providing an edging apparatus comprising at least one sensor configured to detect a distance from the sensor to the edge to be ground;   providing a workpiece having an edge to be ground;   setting a base value of the distance;   detecting a variation value, the variation value is a difference between a present distance from the sensor to the edge to be ground during grinding and the base value; and   regulating a grinding feed amount of the edging apparatus according to the variation value.   
     
     
         2 . The edging method of  claim 1 , further comprising:
 defining a base line according to an edge contour of the workpiece;   detecting a base distance from the sensor to the base line when the edging apparatus contacts the base line; and   setting the base distance as the base value.   
     
     
         3 . The edging method of  claim 1 , wherein:
 the variation value is zero if the present distance is equal to the base value;   the variation value is a positive value if the detection value is greater than the base value; and   the variation value is a negative value if the detection value is smaller than the base value.   
     
     
         4 . The edging method of  claim 1 , wherein the grinding feed amount is equal to a sum of the variation value and a preset grinding depth. 
     
     
         5 . The edging method of  claim 1 , wherein the edging apparatus is capable of moving along a first moving direction and a second moving direction during grinding, the first moving direction is a grinding depth direction of the edging apparatus to grind the workpiece, and the second direction is perpendicular to the first moving direction. 
     
     
         6 . The edging method of  claim 1 , further comprising:
 detecting a cumulative value of a working mileage of the edging apparatus during grinding; and   comparing the cumulative value of the working mileage to a threshold value reflecting a service life of the edging apparatus;   if the cumulative value of the working mileage is equal to or larger than the threshold value, giving a reminder to change the grinding assembly of the edging apparatus.   
     
     
         7 . The edging method of  claim 1 , wherein the at least one sensor is fixedly disposed on the edging apparatus. 
     
     
         8 . The edging method of  claim 1 , wherein the grinding feed amount is regulated by a controller. 
     
     
         9 . An edging method, applied to an edging apparatus comprising a sensor, a grinding assembly, and a controller respectively electrically connected to the sensor and the grinding assembly, comprising:
 in a grinding process to grind a workpiece having an edge to be ground by the grinding assembly, using the controller to acquire a first distance detected by the sensor, wherein the first distance is a distance from the sensor to a first position on the edge of the workpiece detected by the sensor;   using the controller to determine a grinding feed amount at the first position according to the first distance; and   when to use the grinding assembly to grind the edge at the first position, using the controller to regulate a position of the grinding assembly according to the grinding feed amount, so that a preset grinding depth is ground away at the first position on the edge.   
     
     
         10 . The method of  claim 9 , wherein the grinding feed amount is equal to a sum of the first distance and a preset grinding depth. 
     
     
         11 . The method of  claim 9 , further comprising:
 using the controller to acquire a second distance detected by the sensor, wherein the second distance is a distance from the sensor to a second position on the edge, the edge is configured to be ground at the first position after being ground at the second position, and the first position is any position on the edge except for an initial grinding position;   wherein using the controller to determine a grinding feed amount at the first position according to the first distance comprises:   using the controller to calculate a distance difference by subtracting the first distance from the second distance; and   determining a variation value of the grinding feed amount at the first position relative to the second position according to the distance difference;   when to use the grinding assembly to grind the edge at the first position, using the controller to regulate a position of the grinding assembly according to the grinding feed amount comprises:   when to use the grinding assembly to grind the edge at the first position, using the controller to control the grinding assembly to move a distance equal to the variation value of the grinding feed amount along a grinding depth direction of the workpiece.   
     
     
         12 . An edging apparatus, configured to grind an edge of a workpiece, comprising:
 a sensor, configured to detect a first distance from the sensor to a first position on the edge;   a controller electrically connected to the sensor, configured to acquire the first distance and determine a grinding feed amount at the first position;   a grinding assembly electrically connected to the controller, configured to grind away a preset grinding depth at the first position according to the grinding feed amount.   
     
     
         13 . The edging apparatus of  claim 12 , wherein a detection range of the sensor is from about 3 mm to about 10 mm. 
     
     
         14 . The edging apparatus of  claim 12 , wherein the grinding assembly comprises:
 a grinding wheel;   a protection cover fixedly connected to the grinding wheel for protecting the grinding wheel;   wherein the sensor is fixed on an outer side of the protection cover.   
     
     
         15 . The edging apparatus of  claim 14 , wherein the edging apparatus is configured to be moved respectively along a grinding depth direction of the workpiece and a second direction perpendicular to the grinding depth direction. 
     
     
         16 . The edging apparatus of  claim 15 , wherein the sensor is disposed at a front end of the grinding assembly along the second direction. 
     
     
         17 . The edging apparatus of  claim 12 , further comprising:
 a working mileage detector respectively electrically connected to the grinding assembly and the controller;   wherein the working mileage detector is configured to detect a cumulative value of a working mileage of the grinding assembly and transfer the cumulative value of the working mileage to the controller;   the controller is further configured to give a reminder to change the grinding assembly of the edging apparatus if the cumulative value of the working mileage is equal to or larger than a threshold value reflecting a service life of the grinding assembly.   
     
     
         18 . The edging apparatus of  claim 12 , wherein
 the sensor is further configured to detect a second distance from the sensor to a second position of the edge, wherein the edge is configured to be ground at the first position after being ground at the second position, and the first position is any position on the edge except for an initial grinding position;   the controller is further configured to acquire the second distance from the sensor, calculate a distance difference by subtracting the first distance from the second distance, and determine a variation value of the grind feed amount at the first position relative to the second position;   the grinding assembly is further configured to grind the workpiece according to the variation value of the grind feed amount.   
     
     
         19 . The edging apparatus of  claim 12 , wherein the sensor is a contact-type sensor or a non-contact sensor. 
     
     
         20 . The edging apparatus of  claim 12 , comprising:
 a first grinding assembly comprising a first grinding wheel and a first protection cover fixedly connected to the first grinding wheel for protecting the first grinding wheel;   a second grinding assembly comprising a second grinding wheel and a second protection cover fixedly connected to the second grinding wheel for protecting the second grinding wheel;   a first sensor fixedly disposed on an outer side of the first protection cover and located at a front end of the first grinding wheel along a second direction perpendicular to a grinding depth direction of the workpiece;   a second sensor fixedly disposed on an outer side of the second protection cover and located at a front end of the second grinding wheel along the second direction perpendicular to the grinding depth direction of the workpiece.