Method for machining inverted slope of inner cavity of false five-axis cabin section

Abstract

The invention provides a false five-axis cabin section inner cavity back-off slope machining method, and belongs to the field of machining. The method aims at solving the problems that the requirement for the size of a workpiece inner cavity is high, and corner allowance of a closed molded surface cannot be removed in the machining process of the inverted slope of the cabin inner cavity. According to the method, a mode that a false five-axis RTCP-free machine tool and a right-angle milling head are matched with a flat cutter is used for machining the inclined plane of the inner cavity of the cabin section, and the method comprises the specific steps that a test block is machined according to a workpiece; after machining, the machine tool A shaft rotates to the same angle to measure the deviation value; during programming, the workpiece coordinate system angle is changed to be perpendicular to the to-be-machined face, and the machine tool deviation value is substituted into a machining coordinate system for programming An A-axis corner value is added to the first row after programming; the right-angle milling head is installed on a machine tool to machine the inner cavity plane in the Y + direction. When the machine tool does not have the RTCP function, inner cavity back-off inclined plane machining is achieved by calculating the machine tool corner deviation; the requirement for the size of an inner cavity of a workpiece is low, the right-angle milling head can complete corner allowance removal of a closed molded surface, practicability is high, and application and popularization can be achieved.

Description

Technical Field

[0001] The invention relates to mechanical processing technology, in particular to a method for processing an undercut slope of an inner cavity of a pseudo five-axis cabin. Background Art

[0002] In the process of machining undercut bevels in the inner cavity of conventional cabin sections, the following two machining methods are generally used: 1. When the inner cavity space of the workpiece is large and the spindle can enter the inner cavity of the workpiece, the bevel can be machined directly using a flat tool on a five-axis machine tool; 2. When the inner cavity space of the workpiece is small, the inner cavity bevel can be machined by using a right-angle milling head equipped with a spherical tool to form a bevel.

[0003] The above method 1 has high requirements on the inner cavity size of the workpiece, and the inner cavity size of the workpiece needs to be large enough for processing; method 2 uses a spherical tool, which has low processing efficiency and cannot complete the problem of clearing the corner allowance of the closed surface. In summary, it is urgent to design a processing method that can reduce the requirements on the inner cavity size of the workpiece and complete the clearance of the corner allowance of the closed surface, so as to improve the processing efficiency of the undercut slope of the inner cavity of the conventional cabin section. Summary of the invention

[0004] A brief overview of the present invention is provided below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify key or important parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] In view of this, in order to solve the practical problem that in conventional cabin section inner cavity undercut bevel processing, the requirements for the inner cavity size of the workpiece are high and the spherical tool processing cannot complete the closed surface and remove the edge and corner allowances, the present invention provides a pseudo five-axis cabin section inner cavity undercut bevel processing method.

[0006] Solution 1: A pseudo five-axis cabin cavity undercut inclined surface machining method, using a pseudo five-axis RTCP-free machine tool plus a right-angle milling head in conjunction with a flat cutter to achieve cabin cavity inclined surface machining. The specific steps are as follows:

[0007] S1. Process a test block according to the angle deviation value of the plane to be processed in the inner cavity of the workpiece, and ensure that the deviation angles of the test block in the Y and Z directions are the same as those of the plane to be processed in the inner cavity of the workpiece;

[0008] S2. After the test block is processed, the machine tool A axis is rotated to the same angle as the plane to be processed in the workpiece cavity, and the Y-axis and Z-axis deviation values ​​of the workpiece are measured in the test block processing coordinate system. This deviation value is the machine tool A axis rotation angle deviation value;

[0009] S3. When programming in UG, change the workpiece coordinate system angle to be perpendicular to the inclined surface to be processed, and bring the machine tool angle deviation value into the workpiece processing coordinate system for programming;

[0010] S4. After programming is completed, the A-axis angle value is added to the first line of the program to achieve undercut plane processing. The workpiece processing zero point is set according to the coordinate system before offset, which is not the same as the coordinate system formed after calculating the angle deviation;

[0011] S5. Install the right-angle milling head to the main spindle of the machine tool, ensure that the right-angle milling head points to the Y+ direction, and start processing the inner cavity plane of the workpiece.

[0012] Furthermore, before processing, the Y- and Z-axis coordinate values ​​of the machine tool need to be measured by a probe, which is used for the subsequent installation of a right-angle milling head to verify the use of the tool zero point.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. A pseudo five-axis cabin section inner cavity undercut slope machining method of the present invention can still realize the machining of the inner cavity undercut slope by calculating the machine tool rotation angle deviation under the premise that the machine tool does not have the RTCP function;

[0015] 2. The method for machining the undercut slope of the inner cavity of a false five-axis cabin section of the present invention has low requirements on the inner cavity size of the workpiece. The closed surface can be completed by machining with a right-angle milling head to remove the edge and corner allowances. The present invention is simple to learn, has strong practicality, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 Schematic diagram of placing the parts to be processed on the machine tool;

[0018] Figure 2 This is a schematic diagram showing the adjustment of the A-axis angular deviation value of the machine tool;

[0019] Figure 3 It is a schematic diagram of the contact between the right-angle milling head and the surface to be processed;

[0020] Figure 4 This is the axonometric view of the processing status.

[0021] In the figure: 1-parts to be processed, 2-machine tool, 3-right-angle milling head. DETAILED DESCRIPTION

[0022] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0023] Example 1, reference Figure 1-4 The present embodiment is described as a method for machining an undercut bevel of a pseudo five-axis cabin cavity. A pseudo five-axis RTCP-free machine tool is used with a right-angle milling head and a flat cutter to achieve machining of the cabin cavity bevel. The specific steps are as follows:

[0024] S1. Process a test block according to the angle deviation value of the plane to be processed in the inner cavity of the workpiece, and ensure that the deviation angles of the test block in the Y and Z directions are the same as those of the plane to be processed in the inner cavity of the workpiece;

[0025] S2. After the test block is processed, the machine tool A axis is rotated to the same angle as the plane to be processed in the workpiece cavity, and the Y-axis and Z-axis deviation values ​​of the workpiece are measured in the test block processing coordinate system. This deviation value is the machine tool A axis rotation angle deviation value;

[0026] S3. When programming in UG, change the workpiece coordinate system angle to be perpendicular to the inclined surface to be processed, and bring the machine tool angle deviation value into the workpiece processing coordinate system for programming;

[0027] S4. After programming is completed, the A-axis angle value is added to the first line of the program to achieve undercut plane processing. The workpiece processing zero point is set according to the coordinate system before offset, which is not the same as the coordinate system formed after calculating the angle deviation;

[0028] S5. Install the right-angle milling head to the main spindle of the machine tool, ensure that the right-angle milling head points to the Y+ direction, and start processing the inner cavity plane of the workpiece.

[0029] Furthermore, before processing, the Y- and Z-axis coordinate values ​​of the machine tool need to be measured by a probe, which is used for the subsequent installation of a right-angle milling head to verify the use of the tool zero point.

[0030] Through the present invention, even if the machine tool does not have the RTCP function, the inner cavity undercut bevel processing can still be achieved through the calculation method of the machine tool rotation angle deviation; the present invention has low requirements on the inner cavity size of the workpiece, and the closed surface can be processed by using a right-angle milling head to remove the edge and corner allowances. It is simple and easy to learn, has strong practicality, and is suitable for popularization and use.

[0031] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is selected primarily for readability and teaching purposes, rather than for explaining or defining the subject matter of the present invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is illustrative, not restrictive, with respect to the scope of the present invention, which is defined by the appended claims.

Claims

1. A method for machining an undercut slope of a pseudo five-axis cabin inner cavity, characterized in that: Use a fake five-axis RTCP-free machine tool with a right-angle milling head and a flat cutter to achieve the inclined surface processing of the cabin cavity. The specific steps are as follows: S1. Process a test block according to the angle deviation value of the plane to be processed in the inner cavity of the workpiece, and ensure that the deviation angles of the test block in the Y and Z directions are the same as those of the plane to be processed in the inner cavity of the workpiece; S2. After the test block is processed, the machine tool A axis is rotated to the same angle as the plane to be processed in the workpiece cavity, and the Y-axis and Z-axis deviation values ​​of the workpiece are measured in the test block processing coordinate system. This deviation value is the machine tool A axis rotation angle deviation value; S3. When programming in UG, change the workpiece coordinate system angle to be perpendicular to the inclined surface to be processed, and bring the machine tool angle deviation value into the workpiece processing coordinate system for programming; S4. After programming is completed, the A-axis angle value is added to the first line of the program to achieve undercut plane processing. The workpiece processing zero point is set according to the coordinate system before offset, which is not the same as the coordinate system formed after calculating the angle deviation; S5. Install the right-angle milling head to the main spindle of the machine tool, ensure that the right-angle milling head points to the Y+ direction, and start processing the inner cavity plane of the workpiece.

2. According to claim 1, a method for machining an undercut slope of a pseudo five-axis cabin inner cavity is characterized in that: Before machining, the Y and Z coordinate values ​​of the machine tool need to be measured by a probe, which will be used to verify the tool zero point when a right-angle milling head is installed later.

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