End face profile linear cutting tool for concave end bolt

Abstract

The utility model relates to a linear cutting tool, in particular to a linear cutting tool for machining the end face appearance of a concave end bolt. The utility model relates to a tool for cutting the outline of the end surface of a concave end bolt. The tool comprises a positioning base and a fastener, one end of the positioning base is mounted on the linear cutting workbench, the other end of the positioning base is suspended and provided with a mounting hole for mounting a to-be-machined part, and the outer diameter of the end is smaller than that of the to-be-machined part; and the fastener fixes the part to be machined on the positioning base. The utility model has the advantages that the positioning reference is directly formed on the machine tool, so that the error caused by manual correction is reduced to the greatest extent, and the error of the finally machined shape basically depends on the precision of linear cutting equipment.

Description

Technical Field

[0001] The utility model relates to a wire cutting tool, in particular to a wire cutting tool for processing the end face shape of a concave end head bolt. Background Art

[0002] As aircraft design advances, the traditional method of flat-surfaced stops, where the bolt end faces are matched to the stopper, is becoming less popular. Instead, a method using concave-end bolts and lugs with stopper bosses is being adopted. This design features a distinct groove on the bolt end face that mates perfectly with the stopper boss, significantly improving interchangeability and retaining reliability compared to traditional methods. However, this method places high demands on the bolt end face's profile, both for the groove itself and for its symmetry relative to the bolt shank. Otherwise, interference may occur during assembly.

[0003] Currently, high-precision CNC milling is mostly used to process the end faces of such bolts. In addition, after semi-finishing, the digital measurement function of the machine tool is used to estimate the offset for finishing. This places certain requirements on the equipment capabilities, and the overall processing efficiency is generally not high. Utility Model Content

[0004] The utility model aims to provide a tool for cutting the end face outline of a concave end head bolt, which greatly improves the processing efficiency while reducing the equipment requirements.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a tool for wire cutting the end face contour of a concave end head bolt, the tool comprising a positioning base and a fastener; one end of the positioning base is mounted on a wire cutting workbench, and the other end is suspended in the air, and is provided with a mounting hole for accommodating the installation of the part to be processed, and the outer diameter of the end is smaller than the outer diameter of the part to be processed; the fastener fixes the part to be processed on the positioning base.

[0006] Preferably, threaded holes I are provided on the positioning base and the wire cutting workbench, and the positioning base is mounted and fixed on the wire cutting workbench by fixing screws adapted thereto.

[0007] Preferably, the height of the fixing screw above the positioning base is not greater than the height of the part to be processed above the mounting hole.

[0008] Preferably, the fastener is a tightening bolt that is adapted to the threaded hole II provided on the positioning base.

[0009] Preferably, the mounting hole has a certain height in the axial direction.

[0010] Preferably, when the outer diameter of the mounting hole is larger than the outer diameter of the part to be processed, a positioning bushing is installed in the mounting hole, and the part to be processed is installed in the positioning bushing.

[0011] Principle: The tooling needs to be used on wire cutting, and before processing parts, precision holes for fixing screws need to be cut on the tooling, and then the bolts are installed on the tooling, completing the shape processing in two steps: front and back.

[0012] Compared with the prior art, the present invention has the following advantages: the positioning reference is directly formed on the machine tool, which minimizes the error caused by human correction, and the final processed shape error basically depends on the accuracy of the wire cutting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the working state of embodiment 1 of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure decomposition of Example 1 of the utility model;

[0015] Figure 3 This is a schematic diagram of the front and back clamping processing of Example 1 of the present invention (the thick solid line is the processing area: A: processing groove characteristic state; B: processing arc characteristic state);

[0016] Figure 4 This is a schematic diagram of the decomposition structure of Example 2 of the present utility model;

[0017] Figure 5 This is a cross-sectional view of Example 2 of the present utility model;

[0018] Figure 6 This is a top view of Example 2 of the utility model;

[0019] Figure 1-3 1. Wire cutting spindle; 2. Wire cutting molybdenum wire; 3. Wire cutting tool; 4. Wire cutting workbench; 5. Parts to be processed; 3-1. Tighten the bolts; 3-2. Fix the screws; 3-3. Position the base;

[0020] Figure 4-6 1. Tighten the bolts; 2. Adjust the bushing; 3. Position the base; 4. Parts to be processed. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-6 The utility model is further described in detail: a concave end bolt end surface profile wire cutting tool, which needs to be used in wire cutting, such as Figure 1As shown, the wire cutting includes a wire cutting spindle 1, a wire cutting molybdenum wire 2 and a wire cutting workbench 4. The wire cutting tool 3 is installed on the wire cutting workbench 4. The wire cutting spindle 1 is located above the wire cutting workbench 4 and cooperates with the wire cutting molybdenum wire 2 to process the part to be processed 5; specifically, the wire cutting tool 3 includes a positioning base 3-3 and a fastener; one end of the positioning base 3-3 is installed on the wire cutting workbench 4, and the other end is suspended in the air, and is provided with a reference hole for installing the part to be processed; the fastener fixes the part to be processed on the positioning base.

[0022] Example 1 (the outer diameter of the end of the part to be processed 5 is larger than the outer diameter of the end of the reference hole)

[0023] A concave end bolt end face contour cutting tool, such as Figure 2-3 As shown, it includes a tightening bolt 3-1, a fixing screw 3-2 and a positioning base 3-3; wherein, the tightening bolt 3-1 is used as a fastener and is adapted to the threaded hole II provided on the positioning base 3-3. When the part 5 to be processed is installed in the reference hole, the tightening screw 3-1 is screwed into the threaded hole II, thereby pressing the part 5 to be processed into the reference hole of the positioning base 3-3; the fixing screw 3-2 is adapted to the threaded hole I provided on the positioning base 3-3 and the wire cutting workbench 4. In this embodiment, the number of threaded holes I is two, and the fixing screw 3-2 is screwed into the threaded hole I, thereby installing and fixing the positioning base 3-3 on the wire cutting workbench 4. A certain margin is left in the inner hole and the outer shape of the positioning base.

[0024] After completing the installation of the positioning base 3-3, the inner hole and outer shape processing are completed directly on the online cutting. At this time, the reference hole reference on the positioning base is theoretically completely consistent with the machine tool reference. At this time, the accurate positioning of the bolt can be achieved. The concave end feature processed under this reference can maximize the position accuracy with the bolt polished rod feature.

[0025] Instructions for use: Refer to the attached Figure 1-3 As shown, install the polished rod of the bolt to be processed into the reference hole of the positioning base, and then fix the part to be processed (bolt) by tightening bolt 1. Call the program to process the groove feature first, then turn the direction of the bolt and process the arc feature on the other side to complete the processing of the concave end.

[0026] Example 2 (Outer diameter of the part to be machined is smaller than the outer diameter of the end of the reference hole)

[0027] In this embodiment, the wire cutting structure and tooling structure are the same as those in Example 1, and will not be described in detail here.

[0028] A concave end bolt end face contour cutting tool, such as Figure 4-6As shown, it includes a tightening bolt 1, an adjusting bushing 2, and a positioning base 3; wherein, the tightening bolt 1 serves as a fastener and is adapted to the threaded hole II opened on the positioning base 3; the fixing screw is adapted to the positioning base 3 and the threaded hole I opened on the wire cutting workbench. When the part 4 to be processed is installed in the reference hole of the positioning base, the tightening screw 1 is screwed into the threaded hole II, thereby pressing the part 4 to be processed into the reference hole of the positioning base 3; in this embodiment, the number of threaded holes I is two, and the fixing screw is screwed into the threaded hole I, thereby fixing the positioning base 3 on the wire cutting workbench 4.

[0029] As a preferred implementation mode of this embodiment, since the outer diameter of the part to be processed is smaller than the outer diameter of the end of the reference hole, in order to improve the positioning accuracy, the adjusting bushing 2 is installed in the reference hole, and the polished rod of the part to be processed is installed in the adjusting bushing 2; that is: as long as the polished rod diameter of the part to be processed (bolt) is smaller than the inner hole diameter D of the positioning base, and the end shape is smaller than the outer circle diameter d of the base, it can be positioned and processed by the adjusting bushing.

Claims

1. A tool for cutting the end face contour of a concave end bolt, characterized by: The tooling includes a positioning base and a fastener; one end of the positioning base is installed on the wire cutting workbench, and the other end is suspended in the air, and is provided with a mounting hole for installing the part to be processed, and the outer diameter of the end is smaller than the outer diameter of the part to be processed; the fastener fixes the part to be processed on the positioning base.

2. The end face contour wire cutting tool of the concave end bolt according to claim 1, characterized in that: Threaded holes I are provided on the positioning base and the wire cutting workbench, and the positioning base is fixed on the wire cutting workbench by fixing screws adapted thereto.

3. The end face contour wire cutting tool of the concave end bolt according to claim 2, characterized in that: The height of the fixing screw above the positioning base is not greater than the height of the part to be processed above the mounting hole.

4. The end face contour wire cutting tool for the concave end bolt according to claim 1, characterized in that: The fastener is a tightening bolt that fits into the threaded hole II provided on the positioning base.

5. The end face contour wire cutting tool of the concave end bolt according to claim 1, characterized in that: The mounting hole has a certain height in the axial direction.

6. The end face contour wire cutting tool of the concave end bolt according to claim 1, characterized in that: When the outer diameter of the mounting hole is larger than the outer diameter of the part to be processed, a positioning bushing is installed in the mounting hole, and the part to be processed is installed in the positioning bushing.

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