Method for machining right angle through CNC (computer numerical control) milling

Abstract

The invention discloses a method for machining a right angle through CNC milling. The method comprises the following steps that S1, rough machining is conducted; s2) selecting a chamfering cutter; s3) determining that the product has a first cutting wall and a second cutting wall, wherein a fillet is arranged between the first cutting wall and the second cutting wall; s4, a cutter shaft of the chamfering cutter is placed perpendicular to the first cutting wall; s5, the chamfering tool is inclined in the direction away from the included angle between the cutting walls, the inclination angle is half of the chamfering angle of the selected tool, and a cutting edge on one side of the tool is made to be perpendicular to the first cutting wall; s6, a blade on one side of the tool is kept perpendicular to the first cutting wall, and the tool is rotated and inclined along the vertical plane; according to the method for machining the right angle through CNC milling, a brand new machining process is designed, additional procedures, cutter customization and special equipment are not needed, the right angle can be directly machined through CNC milling, the procedures are reduced, the risk of process management and control is reduced, and the machining cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of milling, and in particular relates to a CNC milling right-angle method. Background Art

[0002] Due to its motion characteristics, CNC milling is a machining process that achieves subtractive manufacturing by causing the cutting edge to repeatedly contact the material through high-speed rotation of the tool. Its motion characteristic is rotation, so the tools are all cylindrical. In actual processing, radial corners will leave arc radius material residue, and the amount of residue depends on the tool diameter, which in turn depends on the product structure and processing depth. Therefore, some products need to be processed into a right-angle state, and this direction cannot meet axial processing. At this time, CNC milling usually cannot meet the processing and production needs, and it is necessary to use electric spark (electric spark, wire cutting) technology, or right-angle inserts and other methods to achieve processing.

[0003] However, both of the above processing methods require professional equipment and processing environment, which leads to problems such as more product processing steps, longer production cycle, higher costs, and increased process control risks. Summary of the invention

[0004] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a method for CNC milling right angles, and a new processing flow is designed. No additional process is required, and CNC milling can directly process right angles; no customized tools are required, and standard chamfering tools can be purchased and used; no special equipment is required, and conventional five-axis machining centers and three-axis machining centers can be used after installing auxiliary universal heads; right angles can be directly processed by CNC milling, which reduces the process steps, reduces the risk of process control, and reduces the processing cost.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a method for CNC milling right angles, comprising the following steps: S1): Rough machining; S2): Use chamfering cutter; S3): Determine that the product has a first cutting wall and a second cutting wall, and a rounded corner is provided between the first cutting wall and the second cutting wall; S4): The chamfering cutter axis is placed perpendicular to the first cutting wall; S5): tilt the chamfering tool away from the angle between the first cutting wall and the second cutting wall, the tilting angle being half of the selected tool chamfering angle, so that the blade on one side of the tool is perpendicular to the first cutting wall; S6): Keep the cutting edge of one side of the tool perpendicular to the first cutting wall, and rotate and tilt the tool along this vertical plane to achieve an avoidance effect; S7): Fixed machining tool axis direction, fixed axis machining.

[0006] Furthermore, the inclination angle of the chamfering tool in S6) is greater than half of the tool chamfering angle, but does not exceed the tool chamfering angle, thereby achieving an avoidance effect. The range of the inclination angle setting of the chamfering tool can effectively avoid interference between the tool and the workpiece, ensuring a smooth machining process; at the same time, the avoidance design enables the chamfering tool to adapt to different machining requirements and workpiece shapes, with high flexibility.

[0007] Furthermore, the fixed axis processing in S7) includes: S701): Determine which side of the fillet between the first cutting wall and the second cutting wall has less residual material; S702): Process from the side with less residual material in the fillet to the side with more residual material. By starting processing from the side with less residual material, the amount of cutting can be gradually increased to avoid the tool from breaking due to sudden large cutting force, ensuring that the cutting force on the tool during processing is relatively uniform, thereby improving processing efficiency and tool life.

[0008] Furthermore, the rough machining in S1) includes: S101): Use end mill for rough milling; S102): Remove burrs and excess material from the workpiece. After removing excess material through rough milling, it can provide a better foundation for subsequent fine processing and improve the overall processing accuracy; at the same time, the end mill can be installed on various CNC machine tools and is flexible to operate.

[0009] Furthermore, the chamfering tool in S2) is a conventional chamfering tool, such as 90°, 60°, 30° chamfering tools, etc., and there is no need to customize the tool, and a standard chamfering tool can be purchased and used, thereby reducing production costs.

[0010] Furthermore, the fixed axis processing in S7) also includes writing a processing program according to the part size and chamfering tool model. The customized processing program can optimize the tool path and reduce unnecessary cutting actions, thereby improving processing efficiency and improving the yield rate of parts.

[0011] Furthermore, during the fixed axis processing in S7), the chamfering cutter rotates along the cutter axis, so that the side edge reciprocates on the fillet between the first cutting wall and the second cutting wall, and the fillet is processed into a right angle, while cleaning the corner residue. The chamfering cutter can effectively clean the corner residue by reciprocating during the processing, ensuring the neatness and smoothness of the processed surface, while realizing the conversion from fillet to right angle.

[0012] It can be seen from the above technical solution that the present invention has the following beneficial effects: 1. The present invention discloses a method for CNC milling a right angle, which designs a new processing flow, and does not require additional processes, and the CNC milling process directly processes the right angle; 2. The present invention provides a method for CNC milling right angles. No customized tools are required. Standard chamfering tools can be purchased and used. No special equipment is required. Conventional five-axis machining centers and three-axis machining centers can be used after installing auxiliary universal heads. Right angles can be directly machined through CNC milling, which reduces the number of working procedures, reduces the risk of process control, and reduces machining costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A diagram showing the steps of a CNC milling right angle method according to the present invention; DETAILED DESCRIPTION

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example

[0015] In this embodiment, Figure 1 The present invention discloses a method for CNC milling a right angle, comprising the following steps: S1): Rough machining; S2): Use chamfering cutter; S3): Determine that the product has a first cutting wall and a second cutting wall, and a rounded corner is provided between the first cutting wall and the second cutting wall; S4): The chamfering cutter axis is placed perpendicular to the first cutting wall; S5): tilt the chamfering tool away from the angle between the first cutting wall and the second cutting wall, the tilting angle being half of the selected tool chamfering angle, so that the blade on one side of the tool is perpendicular to the first cutting wall; S6): Keep the cutting edge of one side of the tool perpendicular to the first cutting wall, and rotate and tilt the tool along this vertical plane to achieve an avoidance effect; S7): Fixed machining tool axis direction, fixed axis machining.

[0016] Specifically, taking a 30° chamfering cutter as an example, the processing steps are as follows: S1): Rough machining; S2): Use a 30° chamfering cutter; S3): Determine that the product has a first cutting wall and a second cutting wall, and a rounded corner is provided between the first cutting wall and the second cutting wall; S4): The 30° chamfering cutter axis is placed perpendicular to the first cutting wall; S5): tilt the 30° chamfering tool away from the angle between the first cutting wall and the second cutting wall at an angle of 15°, so that the blade on one side of the tool is perpendicular to the first cutting wall; S6): Keep the blade of one side of the 30° chamfering tool perpendicular to the first cutting wall, and rotate and tilt the tool 17° along this vertical plane to achieve the avoidance effect; S7): Fixed machining tool axis direction, fixed axis machining.

[0017] In this embodiment, Figure 1 In S6), the inclination angle of the chamfering tool is greater than half of the chamfering angle of the tool, but does not exceed the chamfering angle of the tool, thereby achieving an avoidance effect.

[0018] Specifically, in the selection of a 30° chamfering cutter, the inclination angle is preferably set to 17°.

[0019] In this embodiment, Figure 1 , the fixed axis processing in S7) includes: S701): Determine which side of the fillet between the first cutting wall and the second cutting wall has less residual material; S702): Process from the side with less residual material in the fillet to the side with more residual material.

[0020] Specifically, before rough machining, the expected residual material thickness is marked on both sides of the fillet according to the design drawings and machining experience; after machining is completed, check these marks and compare them with the actual residual material. If the residual material thickness on one side is significantly lower than the mark, it means that there is less residual material on that side.

[0021] In this embodiment, Figure 1 , the rough machining in S1) includes: S101): Use end mill for rough milling; S102): Remove burrs and excess material from the workpiece.

[0022] Specifically, during rough milling, ensure that the workpiece is firmly fixed on the workbench to prevent it from moving during processing; at the same time, the surface of the workpiece needs to be cleaned before rough milling to remove dirt or oil stains that may affect the processing quality.

[0023] In this embodiment, Figure 1 The chamfering tool in S2) is a conventional chamfering tool, such as a 90°, 60°, 30° chamfering tool, etc.

[0024] In particular, conventional chamfering cutters can meet production needs at low cost and do not require additional customized cutters or tools.

[0025] In this embodiment, Figure 1 The fixed axis machining in S7) also includes writing a machining program according to the part size and chamfering tool model.

[0026] Specifically, the G-code program is written according to the part size and chamfering requirements. The program should include tool path, cutting depth, feed rate, etc., and is compiled using Unigraphics NX software.

[0027] In this embodiment, Figure 1 During the fixed axis processing in S7), the chamfering cutter rotates along the cutter axis, so that the side edge reciprocates on the fillet between the first cutting wall and the second cutting wall, and the fillet is processed into a right angle, while cleaning the corner residue.

[0028] Specifically, during fixed-axis machining, it is necessary to set corresponding cutting parameters according to different parts processing, including cutting speed, feed rate and cutting depth, to ensure machining efficiency and quality.

[0029] In particular, the use of coolant can be increased to reduce the temperature of the cutting zone, reduce tool wear, and help clean up residual material.

[0030] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A method for CNC milling right angles, characterized in that: The steps include: S1): Rough machining; S2): Use chamfering cutter; S3): Determine that the product has a first cutting wall and a second cutting wall, and a rounded corner is provided between the first cutting wall and the second cutting wall; S4): The chamfering cutter axis is placed perpendicular to the first cutting wall; S5): tilt the chamfering tool away from the angle between the first cutting wall and the second cutting wall, the tilting angle being half of the selected tool chamfering angle, so that the blade on one side of the tool is perpendicular to the first cutting wall; S6): Keep the cutting edge of one side of the tool perpendicular to the first cutting wall, and rotate and tilt the tool along this vertical plane to achieve an avoidance effect; S7): Fixed machining tool axis direction, fixed axis machining.

2. The CNC milling right angle method according to claim 1, characterized in that: The inclination angle of the chamfering tool in S6) is greater than half of the chamfering angle of the tool, but does not exceed the chamfering angle of the tool, thereby achieving an avoidance effect.

3. The CNC milling right angle method according to claim 1, characterized in that: The fixed axis processing in S7) includes: S701): Determine which side of the fillet between the first cutting wall and the second cutting wall has less residual material; S702): Process from the side with less residual material in the fillet to the side with more residual material.

4. The CNC milling right angle method according to claim 1, characterized in that: The rough machining in S1) includes: S101): Use end mill for rough milling; S102): Remove burrs and excess material from the workpiece.

5. The CNC milling right angle method according to claim 1, characterized in that: The chamfering tool in S2) is a conventional chamfering tool, such as a 90°, 60°, 30° chamfering tool, etc.

6. The CNC milling right angle method according to claim 5, characterized in that: The fixed axis machining in S7) also includes writing a machining program according to the part size and chamfering tool model.

7. The CNC milling right angle method according to claim 1, characterized in that: During the fixed axis processing in S7), the chamfering cutter rotates along the cutter axis, so that the side edge reciprocates on the fillet between the first cutting wall and the second cutting wall, and the fillet is processed into a right angle, while cleaning the corner residual material.

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