Honeycomb workpiece flat bottom plunge milling machining method

Abstract

The invention discloses a honeycomb workpiece flat bottom plunge milling machining method. The method comprises the steps that S1, a tool is combined and positioned, wherein lines are scribed on the tool or baffles are arranged in the X direction and the Y direction of a machine tool to position the tool; s2, measuring the angle of the cutter: mounting the cutter on a spindle head, and measuring an included angle a between the cutter and the spindle when the orientation of the cutter is 0 degree; s3, modifying the included angle between the cutter and the main shaft in the numerical control program when the orientation is 0 degree to be an included angle a; s4, after the angle of the cutter is qualified, the numerical control program is operated to control the cutter to machine the honeycomb workpiece; and S5, after the machined honeycomb workpiece is qualified, the numerical control program process is ended. The honeycomb flat bottom plunge milling machining process solves the problem that machining cannot be conducted when an inner cavity or a long seam has a right angle or other angles. Compared with a traditional honeycomb machining process, the plunge milling process is used, large step pitch and feeding are used, and multi-layer milling during machining of a common milling cutter is avoided, so that the machining time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of honeycomb processing, and in particular to a flat-bottom plunge milling processing method for a honeycomb workpiece. Background Art

[0002] With the development of modern aviation technology, higher requirements have been put forward for the stealth performance of aircraft, and a large number of new high-performance materials have been introduced. Honeycomb absorbing materials have been widely used in the new generation of combat aircraft due to their many advantages such as high strength-to-weight ratio, especially in honeycomb structural parts. However, in the design of honeycomb structural parts, stealth performance often needs to be considered. There will be right angles or other angles in the structural design. In the past processing, the processing of the side walls or long seams of the honeycomb cavity is limited by the structure of the milling cutter. When there is an angle in the cavity, it can only be processed into a rounded corner, and then the angle is trimmed by the fitter to ensure the product size. In this process, the fitter often has too large a tolerance for grinding, which causes gaps in the product assembly, affects the stealth design or assembly plan, and causes the product to be unqualified and affects the subsequent process. Therefore, it is necessary to seek a new processing method to solve the processing of right angles or other angles in the cavity. Summary of the invention

[0003] The purpose of the present invention is to provide a flat-bottom plunge milling method for a honeycomb workpiece, so as to solve the technical problem that the tolerance of the processing of the inner cavity right angle or other angles in the existing processing procedures is too large, resulting in the product being easily unqualified.

[0004] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a method for flat-bottom plunging of a honeycomb workpiece, comprising the following steps: S1. Assemble and position the tooling: mark lines on the tooling or set baffles in the XY direction of the machine tool to position the honeycomb tooling; S2. Tool angle measurement: install the tool on the spindle head and measure the angle a between the tool and the spindle when the orientation is 0°; S3, modifying the angle between the tool and the spindle when the orientation is 0° in the CNC program to be angle a; S4, checking whether the tool angle is qualified, if the tool angle is qualified, controlling the tool to process the honeycomb workpiece by running the numerical control program; S5, checking whether the processed workpiece is qualified. If the processed honeycomb workpiece is qualified, the numerical control program process is terminated.

[0005] Furthermore, the tooling includes a bottom tooling, a honeycomb workpiece, a pressing plate, and a cutter from bottom to top, and the pressing plate fixes the honeycomb workpiece through gaskets and bolts.

[0006] Furthermore, the tool is a flat-bottomed plunge milling cutter.

[0007] Furthermore, in S2, the cutting edge of the tool faces the positive direction of the X-axis of the machine tool, and the angle a is parallel to the X-axis of the machine tool and does not exceed 90°.

[0008] Furthermore, the angle a refers to the angle between the cutting edge surface and the X-axis of the machine tool.

[0009] Furthermore, in S3, the angle is modified by adding an SPOS instruction or other M code for specifying spindle positioning in the program.

[0010] Furthermore, the processing performed by running the program in S4 includes: (1) Processing of the profile and angle of the inner cavity side wall of the honeycomb workpiece; (2) Use ordinary end mills to remove excess inner cavity residue (3) Processing of the honeycomb workpiece shape.

[0011] Based on the above technical solution, the embodiments of the present invention can at least produce the following technical effects: (1) Compared with the conventional honeycomb processing method, the flat-bottom plunge milling processing method of the honeycomb workpiece provided by the present invention uses a plunge milling process, uses a large step distance and feed, avoids multi-layer milling during ordinary milling cutter processing, and thus reduces processing time.

[0012] (2) The present invention provides a flat-bottom plunge milling method for a honeycomb workpiece. The spindle speed is zero during flat-bottom plunge milling. The side walls of the cells are smooth and burr-free during processing. The burrs generated when the end mill is used to break the cells during high-speed milling are optimized.

[0013] (3) The flat-bottom plunge milling processing method of the honeycomb workpiece provided by the present invention solves the difficulty of processing when the inner cavity or long seam has right angles or other angles.

[0014] (4) The flat-bottom plunge milling processing method for the honeycomb workpiece provided by the present invention uses the spindle positioning function to accurately position the angle, thereby reducing the angle error caused by fitting during linear XY point processing and improving the assembly accuracy of the honeycomb workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 is a flow chart of a processing method according to an embodiment of the present invention; Figure 2 is a schematic diagram of a flat bottom plunge milling according to an embodiment of the present invention, wherein the direction of the arrow is the machining direction; Figure 3 Schematic diagram of measuring spindle positioning angle of a flat-bottom plunge milling cutter according to an embodiment of the present invention; In the figure: 1. Bottom tooling; 2. Honeycomb workpiece; 3. Press plate; 4. Gasket; 5. Bolt; 6. Cutting tool. DETAILED DESCRIPTION

[0017] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0018] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0019] like Figure 1-3 As shown, the present invention provides a method for flat-bottom plunging and milling of a honeycomb workpiece, comprising the following steps: S1. Design tooling according to the shape of the part blank, such as Figure 1 As shown, the tooling includes a set of tooling, a set of fixed positioning plates, several bolts and gaskets, and lines are engraved on the tooling or baffles are set in the XY direction for rough positioning. Figure 1 (Shown in S1); S2. Install the flat-bottomed plunge milling cutter on the spindle head, and use a tool setting instrument or manually measure the angle a between the tool and the spindle when the orientation is 0°. The measured angle a needs to be approximately parallel to the X-axis of the machine tool and generally does not exceed 90°, and the cutting edge faces the positive direction of the X-axis. Figure 2 As shown (as Figure 1 (S2 in Figure 5); S3. Modify the angle of the CNC program by using the system spindle positioning command or manual change (adding SPOS command or other specified spindle positioning M code in the program), (such as Figure 1 (as shown in S3); S4. Use the tool inspection block to inspect the tool before running the CNC program to check whether the tool angle is qualified. If qualified, the processing steps are as follows: (1) Processing the inner cavity side wall profile and angle of the honeycomb workpiece.

[0020] (2) Use ordinary end mills to remove excess inner cavity residue (3) Milling the shape of honeycomb workpiece Processing instructions Figure 2 As shown, after completion, the required angle of the front end structure design can be milled (the angle is generally not less than 90°) (as shown Figure 1 (shown in S4); S5. After the processing is completed, use a specific plug or an angle meter to measure whether the angle is qualified. If it is qualified, remove the workpiece, the program is completed, and the process is ended (such as Figure 1 (shown in S5).

[0021] The structures, functions and connection forms disclosed in this article can be implemented in other ways. For example, the embodiments described above are only exemplary, for example, multiple components can be combined or integrated into another component; in addition, each functional component in each embodiment of this article can be integrated into one functional component, or each functional component can exist physically separately, or two or more functional components can be integrated into one functional component.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for flat-bottom plunging of a honeycomb workpiece, characterized in that: The following steps are involved: S1. Assemble and position the tooling: mark the tooling or set a baffle in the XY direction of the machine tool to position the tooling; S2. Tool angle measurement: install the tool on the spindle head and measure the angle a between the tool and the spindle when the orientation is 0°; S3, modifying the angle between the tool and the spindle when the orientation is 0° in the CNC program to be angle a; S4, checking whether the tool angle is qualified, if the tool angle is qualified, controlling the tool to process the honeycomb workpiece by running the numerical control program; S5, checking whether the processed honeycomb workpiece is qualified. If the processed honeycomb workpiece is qualified, the numerical control program process is terminated.

2. The flat bottom plunge milling method of a honeycomb workpiece according to claim 1, characterized in that: The tooling comprises, from bottom to top, a bottom tooling (1), a honeycomb workpiece (2), a pressing plate (3), and a cutter (6); the pressing plate (3) fixes the honeycomb workpiece (2) via a gasket (4) and bolts (5).

3. The flat bottom plunge milling method of a honeycomb workpiece according to claim 1, characterized in that: The tool is a flat-bottomed plunge milling cutter.

4. The flat bottom plunge milling method of a honeycomb workpiece according to claim 1, characterized in that: In S2, the cutting edge of the tool faces the positive direction of the X-axis of the machine tool, and the angle a does not exceed 90°.

5. The flat-bottom plunge milling method of a honeycomb workpiece according to claim 1, characterized in that: In S3, the angle is modified by adding an SPOS instruction or other M code for specifying spindle positioning in the program.

6. The flat-bottom plunge milling method of a honeycomb workpiece according to claim 1, characterized in that: The processing performed by the program running in S4 includes: (1) Processing of the profile and angle of the inner cavity side wall of the honeycomb workpiece; (2) Use ordinary end mills to remove excess inner cavity residue (3) The shape of the plunge-milled honeycomb workpiece.

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