CN-117862575-B - Mirror surface processing method for curved surface corner

Abstract

The invention discloses a method for processing a curved surface corner mirror surface, which uses a numerical control machine tool to process a right angle corner of a workpiece into a curved surface corner with a mirror surface, wherein the numerical control machine tool is provided with a cutter disc driven by three shafts and an angle head, a first cutter, a second cutter and a third cutter with linear structures are arranged on the cutter disc, and a rolling cutter capable of rotating is arranged on the angle head; the first cutter, the second cutter, the third cutter and the rolling cutter are sequentially adjusted according to the sequence to carry out linear cutting on the workpiece, the triangular area protruding out is cut off, and finally, the surface of the curved corner can quickly and effectively form the up-to-standard mirror surface effect through the milling process of the milling cutter, so that the mirror surface effect processed by the curved corner mirror surface processing method is good, the processing precision is high, and the processing efficiency is high.

Inventors

• GE SHENGHUA

Assignees

• 东莞创响智能科技有限公司

Dates

Publication Date

20260512

Application Date

20231226

Claims (2)

1. 1. The method for processing the curved surface corner mirror surface by using the numerical control machine tool to process the right angle corner of the workpiece into the curved surface corner with the mirror surface is characterized in that the numerical control machine tool is provided with a cutter disc driven by three shafts and an angle head, a first cutter, a second cutter and a third cutter with linear structures are arranged on the cutter disc, a rolling cutter capable of rotating is arranged on the angle head, the rolling cutter is cylindrical, a plurality of blades are convexly arranged on the rolling cutter, and the method for processing the curved surface corner mirror surface comprises the following steps: acquiring the curvature radius and the arc length of a curve corner; Obtaining geometrical parameters of a workpiece and establishing a corresponding mathematical model; marking a right-angle corner to be processed in the mathematical model; introducing the curvature radius and the arc length into the mathematical model, and calibrating a part to be cut; Finding out edge points A, B and right-angle corner points C on two sides from the parts which are marked to be cut; Generating a first cutting scheme for controlling the feeding path of the first cutter by using a connecting line of the midpoint of a line segment AC and a line segment BC, wherein an endpoint D is formed on the line segment AC after the first cutting scheme is used for cutting, and an endpoint E is formed on the line segment BC; generating a second cutting scheme for controlling the feeding path of the second cutter by using a connecting line of the midpoint of the line segment AD and the midpoint of the line segment ED, wherein an endpoint F is formed on the line segment AD and an endpoint G is formed on the line segment ED after the second cutting scheme is cut; Generating a third cutting scheme for controlling the feeding path of the second cutter by using a connecting line of the midpoint of the line segment BE and the endpoint G, wherein the endpoint H is formed on the line segment BE after the third cutting scheme is cut; the direction of the feed path of the second cutting scheme is from an end point F to an end point G, the direction of the feed path of the third cutting scheme is from an end point G to an end point H, and the second cutter deflects a certain angle at the end point G to the end point H so as to execute the third cutting scheme; generating a fourth cutting scheme for controlling the feeding path of the third cutter by using a connecting line of the line segment FG and the midpoint of the line segment GH, wherein after the fourth cutting scheme cuts, an endpoint I is formed on the line segment FG, and an endpoint J is formed on the line segment GH; the residual arc line AB and the broken line section A-F-I-J-H-B form a hob region, and a curved surface cutting scheme for controlling the feeding path and the offset of the rolling cutter is generated by the hob region; Fixing a workpiece on a platform of a numerical control machine tool, and guiding the first cutting scheme, the second cutting scheme, the third cutting scheme, the fourth cutting scheme and the curved surface cutting scheme into the numerical control machine tool; the numerical control machine tool sequentially performs cutting on a workpiece according to the sequence of the first cutting scheme, the second cutting scheme, the third cutting scheme, the fourth cutting scheme and the curved surface cutting scheme to form a curved surface corner with a semi-mirror effect; The method comprises the steps of replacing a rolling cutter with the milling cutter to mill a curved corner surface with a half mirror surface effect, stopping milling the curved corner surface if the reflectivity of the curved corner surface reaches a preset value, and continuing milling the curved corner surface until the reflectivity of the curved corner surface reaches the preset value if the reflectivity of the curved corner surface does not reach the preset value.
2. 2. A method of mirror finishing a curved corner as claimed in claim 1, wherein said obtaining geometrical parameters of the workpiece and establishing a corresponding mathematical model further comprises: acquiring design parameters of a workpiece and actual parameters of the workpiece produced according to the design parameters; establishing a workpiece model according to the design parameters and the actual parameters; Extracting geometric parameters of a workpiece from the workpiece model; Based on the geometric parameters, the SolidWorks software is used for establishing and forming a corresponding mathematical model.

Description

Mirror surface processing method for curved surface corner Technical Field The invention relates to the field of industrial automation, in particular to a method for processing a right-angle corner of a workpiece into a mirror surface by using a numerical control machine tool. Background The high-precision metal mirror surface is widely applied to the key technical fields of deep space exploration, astronomical observation and the like, and the high-precision metal mirror surface is mainly manufactured by an ultra-precision turning method at present. Under the conditions of using a high-precision numerical control machine tool and strictly controlling vibration, temperature, humidity, and the like of a processing environment, a metal mirror surface of nano-scale surface roughness has been obtained. At present, a key factor limiting further improvement of the metal mirror surface processing precision is a metallographic structure of a material. Specifically, the metal material used for mirror processing is generally a polycrystalline material, and the polycrystalline material is affected by factors such as solidification speed in the manufacturing process, and the metal crystal grain size is large and the orientation uniformity of the crystal grains is poor. The different orientations of the metal grains lead to different mechanical properties of adjacent metal grains, so that the elastic recovery values of the adjacent metal grains after turning are different, and finally, the surface roughness of the ultra-precise turned metal mirror surface is obviously increased. Therefore, the processing accuracy of the metal mirror surface cannot be further improved due to the influence of the existing metal material metallographic structure. Therefore, there is a need for a method for mirror finishing curved corners with high precision and high efficiency. Disclosure of Invention The invention aims to provide a curved surface corner mirror surface processing method with high mirror surface effect processing precision and high processing efficiency. In order to achieve the above object, the present invention provides a method for processing a curved corner mirror surface, which uses a numerical control machine to process a right angle corner of a workpiece into a curved corner of a mirror surface, wherein the numerical control machine is provided with a cutter head driven by three axes and an angle head, the cutter head is provided with a first cutter, a second cutter and a third cutter with linear structures, the angle head is provided with a rolling cutter capable of rotating, the rolling cutter is cylindrical, and a plurality of blades are convexly arranged on the rolling cutter, the method for processing the curved corner mirror surface comprises: acquiring the curvature radius and the arc length of a curve corner; Obtaining geometrical parameters of a workpiece and establishing a corresponding mathematical model; marking a right-angle corner to be processed in the mathematical model; introducing the curvature radius and the arc length into the mathematical model, and calibrating a part to be cut; Finding out edge points A, B and right-angle corner points C on two sides from the parts which are marked to be cut; Generating a first cutting scheme for controlling the feeding path of the first cutter by using the midlines of a line segment AC and a line segment BC, wherein an endpoint D is formed on the line segment AC after the first cutting scheme is used for cutting, and an endpoint E is formed on the line segment BC; generating a second cutting scheme for controlling the feeding path of the second cutter by using the central lines of a line segment AD and a line segment ED, wherein an endpoint F is formed on the line segment AD and an endpoint G is formed on the line segment ED after the second cutting scheme is cut; Generating a third cutting scheme for controlling the feeding path of the second cutter by using a connecting line of the midpoint of the line segment BE and the endpoint G, wherein the endpoint H is formed on the line segment BE after the third cutting scheme is cut; the direction of the feed path of the second cutting scheme is from an end point F to an end point G, the direction of the feed path of the third cutting scheme is from an end point G to an end point H, and the second cutter deflects a certain angle at the end point G to the end point H so as to execute the third cutting scheme; generating a fourth cutting scheme for controlling the feeding path of the third cutter by using the midlines of a line segment FG and a line segment GH, wherein an endpoint I is formed on the line segment FG after the fourth cutting scheme is used for cutting, and an endpoint J is formed on the line segment GH; the residual arc line AB and the broken line section A-F-I-J-H-B form a hob region, and a curved surface cutting scheme for controlling the feeding path and the offset of the rolling cutter is generated b