CN-122007972-A - Finish milling processing method of metal mold

CN122007972ACN 122007972 ACN122007972 ACN 122007972ACN-122007972-A

Abstract

The invention relates to a finish milling processing method of a metal die, which belongs to the technical field of metal dies and comprises the following steps of firstly, automatically collecting points of a reference edge and a finish processing surface of a workpiece through a monitoring module, comparing monitoring data with cad drawings, calculating rotation and translation deviation of a theoretical coordinate system, dynamically correcting a processing coordinate system according to the deviation, secondly, monitoring cutting force and vibration through the monitoring module, calculating a comprehensive risk coefficient according to deviation values of the cutting force and the vibration, executing the third step until the comprehensive risk coefficient exceeds a risk coefficient threshold value when the control module judges that the comprehensive risk coefficient exceeds the risk coefficient threshold value, and executing the fourth step until the processing is completed, thirdly, allowing the cutter to compensate, adding compensation quantity according to the value of the comprehensive risk coefficient, reducing feeding speed in set time, and returning to the second step, and fourthly, judging the processing completion and resetting the coordinate system, namely, when all finish processing paths are completed, automatically resetting the control module to the initial processing coordinate system.

Inventors

Pan Zhanguo
PAN WENPENG

Assignees

广东龙广模钢实业有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (8)

1. A finish milling processing method of a metal die is characterized by comprising the following steps: The method comprises the steps that firstly, a control module automatically collects points on a reference edge and a finish machining surface of a workpiece through a monitoring module, compares monitoring data with cad drawings, calculates rotation and translation deviations of a theoretical coordinate system, and dynamically corrects the machining coordinate system according to the deviations; step two, the control module monitors cutting force and vibration through the monitoring module, calculates a comprehensive risk coefficient according to deviation values of the cutting force and vibration, and executes the step three when the control module judges that the comprehensive risk coefficient exceeds a risk coefficient threshold value until the cutting force and vibration are completed, and executes the step four when the cutting force and vibration are completed; Step three, cutter letting compensation, wherein the control module adds compensation quantity according to the value of the comprehensive risk coefficient, reduces the feeding speed in the set time and returns to the step two; And fourthly, judging the machining completion and resetting the coordinate system, wherein when all the finishing paths are executed, the control module is automatically reset to the initial machining coordinate system.
2. The method of finish milling a metal mold according to claim 1, wherein the second step further comprises the step of calculating a comprehensive risk factor Z by the control module according to deviation values of the cutting force F and the vibration V, wherein Z=k1×F/F0+k2×V/V0, k1 and k2 are weighting coefficients, k1+k2=1, and F0 and V0 are reference thresholds of the cutting force and the vibration input in advance, respectively.
3. The method of finish milling a metal mold according to claim 2, wherein the third step further comprises the step of adding B units of compensation step values by the control module according to the value of the comprehensive risk coefficient Z, wherein B=Z/Z0×d, d is a correction coefficient input in advance, and Z0 is a risk coefficient threshold.
4. The method of finish milling a metal mold according to claim 1, wherein the third step further comprises the control module reducing the feed rate within a time period t0 after determining that the integrated risk factor exceeds the risk factor threshold, wherein t0=z/z0×t1, and t1 is a preset reduction duration.
5. The method for finish milling a metal mold according to claim 4, wherein the second step further comprises the step of monitoring the temperature by the control module, and the third step further comprises the step of further reducing the milling depth of the tool when the control module judges that the temperature exceeds the threshold value.
6. The method of finish milling a metal mold according to claim 5, wherein when the control module determines that the temperature t exceeds a threshold t0, the milling depth of the tool is reduced by B1 units, wherein B1= (t/t 0). Times.e, e is a preset depth correction coefficient.
7. The method of claim 1, wherein the second step further comprises the step of obtaining the turbidity of the cutting fluid in the cutting fluid tank by the monitoring module, and further reducing the milling depth of the tool when the turbidity exceeds a threshold value.
8. The method of finish milling a metal mold according to claim 1, wherein the first step further comprises inputting values of t0, F0, V0, Z0, e, d, k1 and k 2.

Description

Finish milling processing method of metal mold Technical Field The invention belongs to the technical field of metal molds, and particularly relates to a finish milling method of a metal mold. Background The machining of metal molds generally involves the steps of preliminary cutting of raw materials, preliminary milling, heat treatment, finishing and surface treatment, during which precise milling of the metal mold is required. Conventional die billet milling devices have exposed a number of problems in practical applications. In the process of processing a milling cutter, a large amount of metal scraps can be generated, and some metal scraps can splash everywhere, so that the metal scraps can not be effectively collected, therefore, chinese patent publication CN120155592A discloses a milling device and a method for manufacturing a steel billet, comprising a device main body, wherein the milling cutter is arranged on the device main body, a scraps blocking cover synchronously moving along with the milling cutter is arranged on the outer side of the milling cutter, a cooling pipe for spraying, cooling and reducing the temperature of the milling cutter is arranged in the scraps blocking cover, a workbench with an adjustable position is arranged below the milling cutter, a recovery groove is arranged on the workbench, the utility model discloses a milling cutter, including the collecting vat, the collecting vat is equipped with the backup pad that can reciprocate and rotatable, still be equipped with anchor clamps on the workstation, the collecting vat bottom is equipped with a plurality of shower, be equipped with on the shower and be used for the shower hole that erodees the backup pad surface, the design that keeps off the bits cover, can effectually prevent milling cutter when milling, the metal fillings splash everywhere, can make the metal fillings concentrate on the workstation that can be better, the better falls into the collecting vat, realize the automatic recovery of metal fillings, but the up-and-down motion and the rotatable design of backup pad, realized the self-cleaning of backup pad surface metal fillings. However, in the above-mentioned scheme, only the clearance of the piece is involved, and the reference deviation is accumulated in the previous processing process, which may cause the deviation of the processing coordinate system, and further cause the core problems of cutter yielding deformation and vibration instability caused by the cutting force mutation, so that the milling precision is not high, and for this reason, a finish milling processing method of a metal mold with high milling precision is required, which can be adjusted according to the previous process error. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a finish milling method of a metal die, which has the characteristics of being adjustable according to the previous process error and high milling precision. The aim of the invention can be achieved by the following technical scheme: A finish milling processing method of a metal die comprises the following steps: The method comprises the steps that firstly, a control module automatically collects points on a reference edge and a finish machining surface of a workpiece through a monitoring module, compares monitoring data with cad drawings, calculates rotation and translation deviations of a theoretical coordinate system, and dynamically corrects the machining coordinate system according to the deviations; step two, the control module monitors cutting force and vibration through the monitoring module, calculates a comprehensive risk coefficient according to deviation values of the cutting force and vibration, and executes the step three when the control module judges that the comprehensive risk coefficient exceeds a risk coefficient threshold value until the cutting force and vibration are completed, and executes the step four when the cutting force and vibration are completed; Step three, cutter letting compensation, wherein the control module adds compensation quantity according to the value of the comprehensive risk coefficient, reduces the feeding speed in the set time and returns to the step two; step four, processing completion judgment and coordinate system resetting, wherein when all finishing paths are executed, the control module automatically resets to an initial processing coordinate system; as a preferred technical scheme of the invention, the second step further comprises the step that the control module calculates a comprehensive risk coefficient Z according to deviation values of the cutting force F and the vibration V, wherein Z=k1×F/F0+k2×V/V0, k1 and k2 are weighting coefficients, k1+k2=1, and F0 and V0 are reference thresholds of the cutting force and the vibration which are input in advance respectively. As a preferable technical scheme of the invention, the third step further comprises the step of adding