Fan-shaped curved surface part normal drilling clamp and fan-shaped curved surface part normal drilling method

By designing a normal hole-making fixture for sector-shaped surface parts and using a three-axis machine tool with a special fixture to realize normal hole processing of sector-shaped surface parts, the problem that three-axis machine tools are difficult to process is solved, and the processing efficiency and resource utilization are improved.

CN120644711APending Publication Date: 2025-09-16SHENYANG AIRCRAFT CORP
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Patent Information

Application Number
CN202511071537.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-01
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Existing technology makes it difficult to efficiently process normal holes of fan-shaped surface parts on three-axis machine tools, and five-axis machine tools have low utilization efficiency, complex operation and serious waste of resources.

Method used

A normal hole-making fixture for fan-shaped surface parts was designed. A three-coordinate machine tool was used in conjunction with a special fixture to achieve internal and external shape processing of the part. The fixture design ensured the accurate positioning and stability of the three holes, avoiding the use of a five-axis machine tool.

Benefits of technology

It realizes efficient processing of normal holes of scalloped surface parts on three-axis machine tools, simplifies the operation process, saves labor time and resources, and reduces manufacturing costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a fan-shaped curved surface part normal drilling clamp and a fan-shaped curved surface part normal drilling method, and belongs to the field of aircraft production and manufacturing. By the adoption of the clamp, accurate positioning of parts can be achieved, a worker can machine holes in the three positions through a radial drilling machine, the use requirement is met, resources of a five-axis machine tool are saved, and labor time is saved; operation is easy, clamping is convenient, and the manufacturing cost is low.
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Description

Technical Field

[0001] The invention relates to a normal hole-making fixture for a sector-shaped curved surface part and a normal hole-making method for the sector-shaped curved surface part, and belongs to the field of aircraft production and manufacturing. Background Art

[0002] Aircraft frames and beams include a sector-shaped curved part that requires integral CNC machining. Its characteristic is that the machining surface of the sector-shaped curved part is open-angled, while the holes on the curved surface are five-axis holes. Three-axis machine tools are not suitable for this type of machining. The number of machines required for this type of part is relatively large, and the following challenges arise during its production: 1) The part's internal and external shapes are open-angled, and while conventional three-axis machine tools can machine the part, they are unable to complete the normal hole positioning. 2) The normal hole is divided into three states, with the holes in each state parallel to each other. While a five-axis standard machine tool can complete the machining task, the five-axis function is only utilized in the hole-making stage, resulting in significant waste during the external shape machining phase, thus failing to fully utilize the five-axis machine's capabilities. 3) Operating a five-axis machine tool requires a relatively high level of operator skill, resulting in a lengthy production preparation cycle. For example, after programming, simulation and machine code conversion verification are required to ensure safe and reliable operation, requiring significant preparation time from the process technicians. For fan-shaped surface parts, a new manufacturing idea needs to be developed to replace five-axis machine tool processing, and after adoption, it is also necessary to meet the processing requirements of the parts. Summary of the Invention

[0003] To complete the machining of the part, we carefully studied the structure of the fan-shaped surface part. The part's internal and external shapes are open-angle surfaces, meaning they can be machined using a three-axis machine. The normal holes on the fan-shaped surface are dispersed at three locations, with the axis of each hole parallel to each other. To reduce the use of five-axis machine tools, a three-axis machine alone can be used to complete the internal and external machining of the part. For the three holes on the fan-shaped surface, we designed a normal drilling fixture for fan-shaped surface parts. This ensures that the three drilling templates on the fixture are horizontal at the three drilling positions, meaning that the hole axis is parallel to the axis of the radial drilling machine during drilling, and the resulting holes meet the requirements.

[0004] According to one aspect of the present application, a normal hole-making fixture for fan-shaped curved surface parts is provided, which consists of a transmission clamping seat 1, a fixture body 2, a drilling template 3, a main locating pin 4, a T-drilling template 5, a diamond-shaped secondary locating shaft 6, a transmission clamping seat 7, a tongue-shaped clamping seat 8, a transmission threaded shaft 9, an L-shaped clamping seat 10, a fork-shaped support 11, a fixed support 12, a stepped pad 13, a main transmission pin 14, a rolling clamping pin 15, a hole-making locating pin 16, a handwheel 17, a nut 18, a bolt 19, a screw 20, an internal thread locating pin 21, and a washer 22.

[0005] The T-shaped drilling template 05, the drilling template 03 and the fixture body 02 are connected to form an integral whole through screws 20 and cylindrical pins 21;

[0006] The stepped pad 13 is connected to the main positioning pin 04 and the diamond-shaped secondary positioning shaft 06 through hole-shaft interference fit, and then connected to the fixture body 02 through screws 20 and cylindrical pins 21 to form an integral whole;

[0007] The tongue-shaped pressing seat 08 and the clamp body 02 are connected into one body through nuts 19 and bolts 18.

[0008] This ensures that the T-shaped drilling template 05, drilling template 03, main positioning pin 04, diamond-shaped secondary positioning shaft 06, tongue-shaped clamping seat 08 and fixture body 02 are rigidly integrated, ensuring that the drilling position is accurate after positioning and clamping.

[0009] The transmission pressing seat 01 is connected to the clamp body 02, the main transmission pin 14, and the hand wheel 17 into a whole through a cylindrical pin 21.

[0010] The transmission clamping seat 01 is provided with 1# drilling position, 2# drilling position and 3# drilling position, and the hole-making positioning pin 16 is inserted and positioned at the three drilling positions respectively to ensure that the axis of the drilling template at each location is perpendicular to the bottom surface of the transmission clamping seat 01, that is, parallel to the axis of the main shaft of the radial drilling machine, among which 1# drilling position, 2# drilling position and 3# drilling position correspond to T-drilling template 05, drilling template 3 and T-drilling template 5 respectively.

[0011] The rolling clamping pin 15 and the nut 19 connect the clamp body 02 to the transmission clamping seat 01 through the T-slot on the transmission clamping seat 01 and ensure that the clamp body 02 rotates smoothly during the rotation process around the main transmission pin 14 as the center, ensuring the stability of the drilling template structure.

[0012] The transmission pressing seat 07 is connected to the clamp body 02 by screws 20.

[0013] The fixed support 12 and the transmission pressing seat 07 are connected into one piece by screws 20;

[0014] The L-shaped pressing seat 10 and the transmission pressing seat 07 are connected into one body via a cylindrical pin 21 .

[0015] The fork-shaped support 11 and the L-shaped pressing seat 10 are connected as a whole through the cylindrical pin 21 and can slide along the waist-shaped hole of the L-shaped pressing seat 10, and can ensure that the L-shaped pressing seat 10 only moves axially during the rotation process around the cylindrical pin 21 on the fixed support 12.

[0016] The transmission threaded shaft 09 is connected to the fork-shaped support 11 through a threaded connection with the transmission pressing seat 07, and can ensure that the transmission threaded shaft 09 drives the fork-shaped support 11 to move axially during the rotation process.

[0017] Turning the transmission threaded shaft 09 drives the L-shaped pressing seat 10 to rotate and tighten the parts, while turning the reverse direction loosens the parts.

[0018] According to another aspect of the present application, a method for making normal holes in fan-shaped surface parts is provided, using the above-mentioned fan-shaped surface part normal hole making fixture.

[0019] The following steps are involved:

[0020] The main positioning pin 04 and the diamond-shaped secondary positioning shaft 06 are inserted into the positioning part according to the reference hole on the part; then the transmission pressing seat 08 presses the part, and the nut 19 is screwed by the bolt 18 to make the washer 22 and the tongue-shaped pressing seat 08 press the part to achieve the positioning and clamping of the part;

[0021] Rotate the transmission threaded shaft 09 to drive the fork-shaped support 11 and the L-shaped pressing seat 10 to rotate and tighten the parts, thereby completing the auxiliary support of the parts and preventing the parts from vibrating during the drilling process;

[0022] Turn the handwheel 17 to drive the fixture body 02 to rotate, and then use the hole-making positioning pin 16 to insert the 1# drilling position, 2# drilling position, and 3# drilling position of the transmission clamping seat 01 and the fixture body 02 in sequence to realize the positioning of the T-drilling template 05, drilling template 03, and T-drilling template 05 respectively, and perform drilling. After completing the drilling work, the fan-shaped curved surface part is obtained.

[0023] The advantages of this application are:

[0024] The use of this fixture can achieve accurate positioning of parts. Workers can use a radial drilling machine to machine holes at these three positions respectively, meeting the use requirements, saving five-axis machine tool resources, and saving labor time; it is simple to operate, easy to clamp, and has low manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the main view of the fan-shaped surface part.

[0026] Figure 2 This is the top view of the fan-shaped surface part.

[0027] Figure 3 Schematic diagram of the normal hole-making fixture for fan-shaped surface parts.

[0028] Figure 4 for Figure 3 Cross-sectional view at point A.

[0029] Figure 5 This is the axonometric drawing of the normal hole-making fixture for fan-shaped surface parts.

[0030] Among them, 1 transmission clamping seat, 2 fixture body, 3 drilling template, 4 main locating pin, 5 T-shaped drilling template, 6 diamond-shaped secondary locating shaft, 7 transmission clamping seat, 8 tongue-shaped clamping seat, 9 transmission threaded shaft, 10 L-type clamping seat, 11 fork-shaped support, 12 fixed support, 13 stepped pad, 14 main transmission pin, 15 rolling clamping pin, 16 hole-making locating pin, 17 handwheel, 18 nut, 19 bolt, 20 screw, 21 internal thread locating pin, 22 washer. DETAILED DESCRIPTION

[0031] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0032] Example 1

[0033] A normal hole-making fixture for fan-shaped curved surface parts, consisting of a transmission clamping seat 1, a fixture body 2, a drilling template 3, a main locating pin 4, a T-drilling template 5, a diamond-shaped secondary locating shaft 6, a transmission clamping seat 7, a tongue-shaped clamping seat 8, a transmission threaded shaft 9, an L-shaped clamping seat 10, a fork-shaped support 11, a fixed support 12, a stepped pad 13, a main transmission pin 14, a rolling clamping pin 15, a hole-making locating pin 16, a handwheel 17, a nut 18, a bolt 19, a screw 20, an internal thread locating pin 21, and a washer 22.

[0034] The T-shaped drilling template 05, the drilling template 03 and the fixture body 02 are connected to form an integral whole through screws 20 and cylindrical pins 21;

[0035] The stepped pad 13 is connected to the main positioning pin 04 and the diamond-shaped secondary positioning shaft 06 through hole-shaft interference fit, and then connected to the fixture body 02 through screws 20 and cylindrical pins 21 to form an integral whole;

[0036] The tongue-shaped pressing seat 08 and the clamp body 02 are connected into one body through nuts 19 and bolts 18.

[0037] This ensures that the T-shaped drilling template 05, drilling template 03, main positioning pin 04, diamond-shaped secondary positioning shaft 06, tongue-shaped clamping seat 08 and fixture body 02 are rigidly integrated, ensuring that the drilling position is accurate after positioning and clamping.

[0038] The transmission pressing seat 01 is connected to the clamp body 02, the main transmission pin 14, and the hand wheel 17 into a whole through a cylindrical pin 21.

[0039] The transmission clamping seat 01 is provided with 1# drilling position, 2# drilling position and 3# drilling position, and the hole-making positioning pin 16 is inserted and positioned at the three drilling positions respectively to ensure that the axis of the drilling template at each location is perpendicular to the bottom surface of the transmission clamping seat 01, that is, parallel to the axis of the main shaft of the radial drilling machine, among which 1# drilling position, 2# drilling position and 3# drilling position correspond to T-drilling template 05, drilling template 3 and T-drilling template 5 respectively.

[0040] The rolling clamping pin 15 and the nut 19 connect the clamp body 02 to the transmission clamping seat 01 through the T-slot on the transmission clamping seat 01 and ensure that the clamp body 02 rotates smoothly during the rotation process around the main transmission pin 14 as the center, ensuring the stability of the drilling template structure.

[0041] The transmission pressing seat 07 is connected to the clamp body 02 by screws 20.

[0042] The fixed support 12 and the transmission pressing seat 07 are connected into one piece by screws 20;

[0043] The L-shaped pressing seat 10 and the transmission pressing seat 07 are connected into one body via a cylindrical pin 21 .

[0044] The fork-shaped support 11 and the L-shaped pressing seat 10 are connected as a whole through the cylindrical pin 21 and can slide along the waist-shaped hole of the L-shaped pressing seat 10, and can ensure that the L-shaped pressing seat 10 only moves axially during the rotation process around the cylindrical pin 21 on the fixed support 12.

[0045] The transmission threaded shaft 09 is connected to the fork-shaped support 11 through a threaded connection with the transmission pressing seat 07, and can ensure that the transmission threaded shaft 09 drives the fork-shaped support 11 to move axially during the rotation process.

[0046] Turning the transmission threaded shaft 09 drives the L-shaped pressing seat 10 to rotate and tighten the parts, while turning the reverse direction loosens the parts.

[0047] A method for making holes in a fan-shaped surface part in a normal direction, using the above-mentioned fan-shaped surface part normal hole making fixture,

[0048] The following steps are involved:

[0049] The main positioning pin 04 and the diamond-shaped secondary positioning shaft 06 are inserted into the positioning part according to the reference hole on the part; then the transmission pressing seat 08 presses the part, and the nut 19 is screwed by the bolt 18 to make the washer 22 and the tongue-shaped pressing seat 08 press the part to achieve the positioning and clamping of the part;

[0050] Rotate the transmission threaded shaft 09 to drive the fork-shaped support 11 and the L-shaped pressing seat 10 to rotate and tighten the parts, thereby completing the auxiliary support of the parts and preventing the parts from vibrating during the drilling process;

[0051] Turn the handwheel 17 to drive the fixture body 02 to rotate, and then use the hole-making positioning pin 16 to insert the 1# drilling position, 2# drilling position, and 3# drilling position of the transmission clamping seat 01 and the fixture body 02 in sequence to realize the positioning of the T-drilling template 05, drilling template 03, and T-drilling template 05 respectively, and perform drilling. After completing the drilling work, the fan-shaped curved surface part is obtained.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art may make various modifications or substitutions within the technical scope disclosed in the present invention, and all such modifications or substitutions shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A normal hole-making fixture for fan-shaped curved surface parts, characterized in that: It consists of a transmission clamping seat 1, a fixture body 2, a drilling template 3, a main locating pin 4, a T-shaped drilling template 5, a diamond-shaped secondary locating shaft 6, a transmission clamping seat 7, a tongue-shaped clamping seat 8, a transmission threaded shaft 9, an L-shaped clamping seat 10, a fork-shaped support 11, a fixed support 12, a stepped pad 13, a main transmission pin 14, a rolling clamping pin 15, a hole-making locating pin 16, a handwheel 17, a nut 18, a bolt 19, a screw 20, an internal thread locating pin 21, and a washer 22.

2. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The T-shaped drilling template (05), the drilling template (03) and the fixture body (02) are connected as one body via screws (20) and cylindrical pins (21); The stepped pad (13) is connected to the main positioning pin (04) and the diamond-shaped secondary positioning shaft (06) through hole-shaft interference fit, and then connected to the fixture body (02) through screws (20) and cylindrical pins (21) to form an integral body; The tongue-shaped pressing seat (08) and the clamp body (02) are connected into one piece via nuts (19) and bolts (18).

3. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The transmission pressing seat (01), the clamp body (02), the main transmission pin (14), and the hand wheel (17) are connected into a whole through a cylindrical pin (21).

4. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The transmission pressing seat (01) is provided with a 1# drilling position, a 2# drilling position, and a 3# drilling position. The hole-making positioning pin (16) is inserted and positioned at the three drilling positions respectively to ensure that the axis of the drilling template at each position is perpendicular to the bottom surface of the transmission pressing seat (01), that is, parallel to the axis of the main shaft of the radial drilling machine. The 1# drilling position, the 2# drilling position, and the 3# drilling position correspond to the T-shaped drilling template (05), the drilling template (3), and the T-shaped drilling template (5), respectively.

5. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The rolling pressing pin (15) and the nut (19) connect the clamp body (02) to the transmission pressing seat (01) through the T-slot on the transmission pressing seat (01) and ensure that the clamp body (02) rotates smoothly during the rotation process around the main transmission pin (14) as the center, thereby ensuring the stability of the drilling template structure.

6. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The transmission pressing seat (07) and the clamp body (02) are connected into one piece via screws (20); The fixed support (12) and the transmission pressing seat (07) are connected into one piece by screws (20); The L-shaped pressing seat (10) and the transmission pressing seat (07) are connected into one body via a cylindrical pin (21).

7. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The fork-shaped support (11) and the L-shaped pressing seat (10) are connected as a whole through a cylindrical pin (21) and can slide along the waist-shaped hole of the L-shaped pressing seat (10), and can ensure that the L-shaped pressing seat (10) only moves axially during the rotation process around the cylindrical pin (21) on the fixed support (12).

8. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The transmission threaded shaft (09) is connected to the fork-shaped support (11) through a threaded connection with the transmission pressing seat (07), and can ensure that the transmission threaded shaft (09) drives the fork-shaped support (11) to move axially during the rotation process.

9. The normal hole-making fixture for fan-shaped curved surface parts according to claim 1, characterized in that: The transmission threaded shaft (09) is screwed to drive the L-shaped pressing seat (10) to rotate and tighten the parts, while the parts are loosened in the opposite direction.

10. A method for making normal holes in sector-shaped curved surface parts, characterized in that: The normal hole-making fixture for fan-shaped curved surface parts according to any one of claims 1 to 9 is used. The following steps are involved: The main positioning pin (04) and the diamond-shaped secondary positioning shaft (06) are inserted into the positioning part according to the reference hole on the part; then the transmission pressing seat (08) presses the part, and the nut (19) is screwed through the bolt (18) to make the washer (22) and the tongue-shaped pressing seat (08) press the part to achieve the positioning and clamping of the part; Rotating the transmission threaded shaft (09) drives the fork-shaped support (11) and the L-shaped pressing seat (10) to rotate and tighten the parts, thereby completing the auxiliary support of the parts and preventing the parts from vibrating during the drilling process; The hand wheel (17) is rotated to drive the fixture body (02) to rotate, and then the hole-making positioning pin (16) is inserted into the transmission pressing seat (01) and the 1# drilling position, 2# drilling position, and 3# drilling position of the fixture body (02) in sequence to respectively realize the positioning of the T-shaped drilling template (05), the drilling template (03), and the T-shaped drilling template (05), and drilling is performed. After the drilling work is completed, the fan-shaped curved surface part is obtained.