Tool change method

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0017] Such as figure 1 As shown, the present invention proposes a method for modifying a knife, which includes the following steps:

[0018] S1: Establish XY axis coordinate information, and obtain the groove position information of the tool to be changed;

[0019] In this step, it can be obtained by a CCD camera. Specifically, after fixing the recovered old tool on the fixture, rotate the tool to the side with a clearer and complete position. The image information obtained by the CCD camera set on the upper part of the milling cutter is When working, usually only 80% of the length of the milling cutter is used, and the end of the tool holder is not used, so the detection end is an accurate starting position, such as figure 1 As shown, the cutting edge of the cutting groove is recorded and its angle with the Y axis is recorded as α, and the point coordinate information of two adjacent peripheral edges in the spiral direction through the preset chip removal groove is recorded as (Xn, Yn ) And (An,Bn).

[0020] S2: Determine the position of the cutting groove: Determine at least one diagonal line to determine the starting point of the cutting groove through the preset angle information of the end of the plane where the cutting groove is located. By rotating the tool body, when the diagonal line and the cutting groove of the tool body Slot alignment determines the position of the cutting groove;

[0021] S3: Determine the location of the chip removal groove: through the preset chip removal groove along the spiral direction of the point coordinate information of the two adjacent peripheral edges and connect the connection, by rotating the tool body, when the corresponding point reaches the preset point coordinate , It is determined as the path of the chip removal groove to be processed;

[0022] S4: Input the cutting groove including width c, depth h, angle β, and cutting edge number n, and input the information of the chip evacuation groove including width, depth, angle, and cutting edge number to the CNC machine tool, and the cutting groove and chip evacuation groove are processed by the machine tool Milling is performed to form a new cutter body. Among them, machining the tool body and recording parameters are carried out at the same time. When the tool body is rotated, when an edge on the tool body is aligned with the line where the angle is α, the initial position of a cutting groove is determined, and the CNC machine tool is started The tool body is made along the path of the straight line and the process of making the knife is the method in the prior art. For example, the patent publication numbers CN 109158962 A, CN 110712016 A, etc. disclose how to grind the milling cutter, which will not be repeated in this application. Compared with the traditional method of making a knife on a polished rod, this application can determine the initial processing position of the original knife, so that further grinding can be performed on the basis of the old knife, and the old knife can be reformed.

[0023] In addition, it should be noted that: unlike the position determination method of the cutting groove, the chip flute is arranged spirally along the cutter body. If the linear alignment method is used, it is easy to align with the chip flute of the non-identical groove body, resulting in judgment Error, so choose the method of finding points, after confirming the end points of the peripheral edges on both sides of the same chip flute, as the mark point, when the cutter body is rotated, because the connection line of the non-same chip flute is connected with the same chip flute The lines are different, so the line obtained after determining the coordinates is the correct starting position of the chip flute. When the two coordinate points are aligned at the same time, it is determined that the starting point of the chip flute can be determined. Then, when making a tool, The cutter body is rotated, and the groove can not be broken along the determined oblique direction, forming a new chip flute, and then making a new cutter.

[0024] Such as figure 2 As shown in the cross-sectional view of the tool, the solid line is the structure of the new knife. The original tool is 2.0mm in diameter in the broken line, so the maximum diameter of the new knife can be 1.9mm or 1.8mm or 1.7 or 1.6 or 1.5. And so on, and compared to the method of making a new knife after grinding the teeth, the tool in this method can be used 2-3 times more.

[0025] Various modifications to the embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.