Drilling tool special for support

Abstract

The utility model relates to a special drilling tool for a bracket, which comprises a positioning seat, according to the technical key points, the positioning seat is composed of a horizontal bottom plate, a limiting table and a positioning groove, wherein the horizontal bottom plate is used for being attached to a small horizontal plate section of the four-stage air entraining pipe support; the limiting table is arranged on one side of the horizontal bottom plate and is used for being attached to a vertical plate section of the four-stage air entraining pipe support; the positioning groove is formed in the top surface of the limiting table and is attached to a large horizontal plate section of the four-stage air entraining pipe support; two lower connecting holes used for being connected with the first pressing plate are formed in the horizontal bottom plate, two middle connecting holes used for being connected with the second pressing plate are formed in the side face of the limiting table, and two upper connecting holes used for being connected with the third pressing plate are formed in the top face of the limiting table. The tool can guarantee the drilling size and pitch tolerance requirements of the part, obviously improves the qualified rate of products, omits the step of cutting bottom holes at first, and is high in drilling efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of manufacturing tooling for aero-engine parts, specifically relating to a special drilling tooling for brackets, which is suitable as a drilling tooling for fourth-stage air duct brackets. Background Technology

[0002] Level IV ventilation tube stent, see Figures 2-5 This is an important component in an aero-engine, consisting of a small horizontal plate segment 801, a large horizontal plate segment 803, and a vertical plate segment 802 connecting the large and small horizontal plate segments. A crucial step in the manufacturing process of this support is drilling.

[0003] The traditional drilling method is as follows: First, use a laser cutting device to cut the outer contour of the bracket before bending, and drill two 6.5mm bottom holes and four 2.6mm diameter bottom holes above the pre-bent large horizontal plate segment, and drill two 6.5mm bottom holes above the pre-bent small horizontal plate segment; then move the bent bracket to the drilling machine, and manually enlarge all the 5mm diameter bottom holes to 6.5mm, and all the 2.5mm diameter bottom holes to 2.6mm.

[0004] However, this method has the following problems: 1. Poor positioning accuracy before reaming leads to unstable reamed hole dimensions and inconsistent hole spacing; 2. Reaming operations are inherently dangerous, requiring operators to have extensive experience and placing significant pressure on them. Due to strict hole spacing tolerance requirements, traditional methods cannot guarantee dimensional accuracy and are time-consuming and labor-intensive. Utility Model Content

[0005] The purpose of this utility model is to provide a special drilling tool for brackets that has a reasonable structure and reliable use, which can ensure the drilling size and hole spacing tolerance requirements of parts, significantly improve the product qualification rate, and eliminate the step of cutting the bottom hole first, thus achieving high drilling efficiency.

[0006] The technical solution of this utility model is:

[0007] A special drilling fixture for a support includes a positioning seat. The key technical features of the positioning seat are: a horizontal base plate for contacting a small horizontal section of a four-stage air intake tube support; a limiting platform located on one side of the horizontal base plate for contacting a vertical section of the four-stage air intake tube support; and a positioning groove located on the top surface of the limiting platform for contacting a large horizontal section of the four-stage air intake tube support. The horizontal base plate has two lower connecting holes for connecting a first pressure plate; the side of the limiting platform has two middle connecting holes for connecting a second pressure plate; and the top surface of the limiting platform has two upper connecting holes for connecting a third pressure plate.

[0008] The aforementioned bracket-specific drilling fixture has two upper connecting holes symmetrically arranged on the left and right sides of the positioning groove.

[0009] The aforementioned special drilling tool for the bracket has two connecting holes symmetrically located on the left and right edges of the side of the limiting platform.

[0010] The aforementioned bracket-specific drilling tool has two lower connecting holes symmetrically located on the left and right edges of the horizontal base plate.

[0011] The aforementioned special drilling tool for the bracket has a chamfered bevel connecting the top and side surfaces of the limiting platform to avoid damaging or interfering with the arrangement of the bracket.

[0012] The aforementioned special drilling fixture for brackets has a bottom surface of the positioning groove with a clearance structure corresponding to the drilling area, and a top surface of the limiting platform with a clearance structure corresponding to the drilling area.

[0013] The aforementioned special drilling tool for brackets has a weight-reducing through hole in the limiting platform.

[0014] The beneficial effects of this utility model are:

[0015] 1. In use, the bent support is placed close to the upper part of the tooling. The small horizontal section of the four-stage air intake tube support rests on the upper surface of the horizontal base plate, and the large horizontal section of the four-stage air intake tube support rests in the positioning groove on the top surface of the limiting platform. The vertical section of the four-stage air intake tube support is against the side of the limiting platform. Then, the corresponding third pressure plate, second pressure plate, and first pressure plate are connected using the upper connecting hole, middle connecting hole, and lower connecting hole to press the edge of the support, thereby fixing the part and preventing displacement such as shaking during drilling. Four 6.5mm diameter bottom holes and four 2.6mm diameter bottom holes on the support can be drilled in one step. Compared with traditional methods, this avoids dimensional inaccuracies caused by secondary positioning, ensures the drilling size and hole spacing tolerance requirements of the parts, significantly improves machining accuracy, and results in a high product qualification rate.

[0016] 2. No need for staff to manually guide the hole enlargement, ensuring good safety. At the same time, by eliminating the step of cutting the pilot hole first, drilling efficiency is greatly improved. Attached Figure Description

[0017] Figure 1 The utility model is shown in the usage state diagram;

[0018] Figure 2 This is a schematic diagram of the support structure;

[0019] Figure 3 yes Figure 2 The left view;

[0020] Figure 4 yes Figure 2Sectional view along the AA direction;

[0021] Figure 5 yes Figure 2 Top view.

[0022] In the diagram: 1. Horizontal base plate, 2. Limiting platform, 3. Top surface, 4. Upper connecting hole, 5. Middle connecting hole, 6. Lower connecting hole, 7. Positioning groove, 8. Four-stage air duct support, 801. Small horizontal plate segment, 802. Vertical plate segment, 803. Large horizontal plate segment, 804. Bottom hole, 805. Bottom hole, 9. Weight reduction through hole. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the special drilling fixture for this support includes a positioning seat. The positioning seat consists of a horizontal base plate 1 for contacting the small horizontal plate segment 801 of the four-stage air intake tube support 8, a limiting platform 2 located on one side of the horizontal base plate 1 for contacting the vertical plate segment 802 of the four-stage air intake tube support 8, and a positioning groove 7 located on the top surface 3 of the limiting platform for contacting the large horizontal plate segment 803 of the four-stage air intake tube support 8. The horizontal base plate 1 has two lower connecting holes 6 for connecting the first pressure plate (omitted in the figure), the side of the limiting platform 2 has two middle connecting holes 5 for connecting the second pressure plate (omitted in the figure), and the top surface 3 of the limiting platform 2 has two upper connecting holes 4 for connecting the third pressure plate (omitted in the figure).

[0025] In this embodiment, the two upper connecting holes 4 are symmetrically arranged on the left and right sides of the positioning groove 7. The two middle connecting holes 5 are symmetrically arranged on the left and right edges of the side of the limiting platform 2. The two lower connecting holes 6 are symmetrically arranged on the left and right edges of the horizontal base plate 1. The top surface 3 of the limiting platform 2 and the side surface are connected by a chamfered bevel to avoid damage or interference with the arrangement of the support. The bottom surface of the positioning groove 7 is provided with a clearance structure corresponding to the drilling area, and the top surface 3 of the limiting platform 2 is provided with a clearance structure corresponding to the drilling area. The limiting platform 2 is provided with a weight-reducing through hole 9.

[0026] Operating instructions:

[0027] In use, the bent bracket is placed close to the upper part of the fixture. The small horizontal plate segment 801 of the four-stage air intake tube bracket 8 rests on the upper surface of the horizontal base plate 1, and the large horizontal plate segment 803 of the four-stage air intake tube bracket 8 rests in the positioning groove 7 on the top surface of the limiting table. The vertical plate segment 802 of the four-stage air intake tube bracket 8 is attached to the side of the limiting table 2. Then, the corresponding third pressure plate, second pressure plate, and first pressure plate are connected by the upper connecting hole 4, the middle connecting hole 5, and the lower connecting hole 6. Each pressure plate presses against the edge of the bracket to fix the part. The fixture is then fixed on a CNC milling machine. Using a 6.5mm diameter drill bit and a 2.6mm diameter drill bit, the fixture is aligned and drilled to create four 6.5mm diameter bottom holes 804 and four 2.6mm diameter bottom holes 805.

[0028] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A stent-specific drilling tool comprising a positioning seat, characterized in that: The positioning seat consists of a horizontal base plate for fitting with the small horizontal plate segment of the fourth-stage air intake tube support, a limiting platform located on one side of the horizontal base plate for fitting with the vertical plate segment of the fourth-stage air intake tube support, and a positioning groove located on the top surface of the limiting platform for fitting with the large horizontal plate segment of the fourth-stage air intake tube support. The horizontal base plate is provided with two lower connecting holes for connecting the first pressure plate, the side of the limiting platform is provided with two middle connecting holes for connecting the second pressure plate, and the top surface of the limiting platform is provided with two upper connecting holes for connecting the third pressure plate.

2. The stent-specific drilling tool according to claim 1, wherein: The two upper connecting holes are symmetrically arranged on the left and right sides of the positioning groove.

3. The stent-specific drilling tool according to claim 1, wherein: The two connecting holes are symmetrically located on the left and right edges of the side of the limiting platform.

4. The stent-specific drilling tool of claim 1, wherein: The two lower connecting holes are symmetrically located on the left and right edges of the horizontal base plate.

5. The stent-specific drilling tool of claim 1, wherein: The top and side surfaces of the limiting platform are connected and transitioned by a chamfered bevel.

6. The stent-specific drilling tool of claim 1, wherein: The bottom surface of the positioning groove is provided with a clearance structure corresponding to the drilling area, and the top surface of the limiting platform is provided with a clearance structure corresponding to the drilling area.

7. The stent-specific drilling tool of claim 1, wherein: The limiting platform is provided with a weight reduction through hole.

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