Invisible hexagon socket bolt assembling tool

Abstract

An inner hexagonal invisible bolt assembly tool comprises a lower assembly positioning seat, an upper assembly positioning seat, a positioning core rod and a locking nut. The positioning core rod is connected with the assembling lower positioning seat through the locking nut after being arranged in the assembling upper positioning seat; the positioning seat, the upper assembling positioning seat, the positioning core rod and the locking nut are all made of Cr12MoV and are subjected to quenching and tempering heat treatment to reach the hardness HRC of 58-62, and the final surface treatment of the tool is cleaning and passivating. The method is easy to use, and the requirement for the skill level of assembly personnel is low; the assembly efficiency is high and the production cost is reduced; assembling is stable and reliable, and product assembling quality is improved; the assembling tool is simple in structure, easy to machine and manufacture and low in cost.

Description

Technical Field

[0001] The invention relates to an assembly tool for hexagon socket invisible bolts, belonging to the technical field of manufacturing mechanical processing parts. Background Art

[0002] Conventional hexagon socket bolts that are tightened with a hexagonal wrench will have the hexagonal groove sunken and exposed after assembly, which will increase the radar wave reflection area and affect the stealth performance of the aircraft.

[0003] The inner hexagonal hole of the hexagon socket bolt is filled with a plug and an absorbing patch is pasted on the end face of the bolt head to absorb radar waves and reduce the radar wave reflection area, thereby improving the stealth performance of the aircraft.

[0004] At present, hexagon socket invisible bolts are widely used on aircraft and are in great demand. Such products are produced frequently and in large quantities.

[0005] Since the bolt is an internal hexagon, the plug that fills the internal hexagon is an external hexagon, such as Figure 1 As shown, during assembly, the inner and outer hexagons must be accurately positioned before the plugging cover can be smoothly installed into the bolt, so the assembly is difficult.

[0006] The traditional assembly method is to manually align the outer hexagon of the plug cover with the inner hexagon of the bolt before assembly. This assembly method is not only inefficient and has a high scrap rate, resulting in a long product production cycle and reduced product profits; it also requires a high level of skill for the assemblers, increasing the difficulty of their work. Summary of the invention

[0007] The present invention aims to solve the technical problems that the assembly method has low efficiency and high scrap rate, which leads to a long product production cycle and reduced product profits; and has high requirements on the skill level of assemblers, which increases the difficulty of the assemblers' work.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: Hexagon socket invisible bolt assembly tool, including assembly lower positioning seat, assembly upper positioning seat, positioning core rod and locking nut; After the positioning core rod is installed in the upper positioning seat, it is fixed to the lower positioning seat through a locking nut; The materials of the positioning seat, the upper positioning seat, the positioning core rod and the locking nut are all Cr12MoV, which reaches the hardness of HRC58-62 after quenching and tempering heat treatment, and the final surface treatment of the tooling is cleaning and passivation.

[0009] The beneficial effects of adopting the above technical solution are: The present invention has high assembly efficiency and reduces production costs; the assembly is stable and reliable, and the product assembly quality is improved; the assembly tooling has a simple structure, is easy to process and manufacture, and has low cost; it is easy to use and has low requirements on the skill level of the assembler. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of a hexagon socket invisible bolt.

[0011] Figure 2 It is a schematic diagram of the structure of the hexagon socket invisible bolt assembly tool of the present invention.

[0012] In the figure: 1-assembly of lower positioning seat, 2-assembly of upper positioning seat, 3-positioning core rod, 4-locking nut.

[0013] Figure 3 for Figure 2 Schematic diagram of the lower positioning seat structure in the middle assembly.

[0014] Figure 4 for Figure 2 Schematic diagram of the positioning seat structure in the middle assembly.

[0015] Figure 5 for Figure 4 Left view.

[0016] Figure 6 for Figure 2 Schematic diagram of the center positioning mandrel structure.

[0017] Figure 7 for Figure 6 Left view.

[0018] Figure 8 for Figure 2 Schematic diagram of the locking nut structure.

[0019] Fig. 9 for Figure 8 Left view.

[0020] Fig.10 This is a diagram of the hexagon socket invisible bolt assembly tool in use.

[0021] Fig.11 This is a diagram showing the use of the filling plug for the hexagon socket invisible bolt assembly tool. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The hexagon socket invisible bolt assembly tool comprises an assembly lower positioning seat 1, an assembly upper positioning seat 2, a positioning core rod 3 and a locking nut 4; After the positioning core rod 3 is installed in the upper positioning seat 2, it is fixed to the lower positioning seat 1 through the locking nut 4; The materials of the positioning seat 1, the upper positioning seat 2, the positioning core rod 3 and the locking nut 4 are all Cr12MoV, and the hardness reaches HRC58-62 after quenching and tempering heat treatment. The final surface treatment of the tooling is cleaning and passivation.

[0024] The assembly tool is based on the hexagon socket bolts and filling plugs, such as Figure 2 As shown, the overall dimensions are used as the design basis for the tooling, and according to the requirements of actual use, a fast, convenient and stable assembly tooling is designed.

[0025] The method of using the present invention is as follows: 1) First, install the hexagon socket bolt 5. Figure 3 The assembly lower positioning seat 1 shown; 2) Then Figure 6 and Figure 7 The positioning mandrel 3 shown is inserted into Figure 4 and Figure 5 Assembled on the positioning seat 2 shown; 3) Finally, install the assembly of step 2) into the assembly of step 1) and put it on Figure 8 and Fig. 9 The locking nut 4 shown is tightened as shown. Fig.10 As shown; 4) Take out the positioning core rod 3, put the filling plug into the inner hexagonal hole of the upper positioning seat 2, and apply pressure to the positioning core rod 3 so that the filling plug slides along the inner hexagonal hole of the upper positioning seat 2 into the hole of the hexagon socket bolt 5 to complete the assembly. Fig.11 shown.

[0026] Compared with the traditional assembly method of manually aligning the outer hexagon of the plug cover with the inner hexagon of the bolt for assembly, the present invention can bring the following beneficial effects: 1) The assembly tool of the present invention is easy to use and has low requirements on the skill level of the assembly personnel; 2) The assembly method of the present invention has high efficiency and low scrap rate, which can reduce production cycle and production cost; 3) The assembly tooling of the present invention is stable and reliable, and can improve the assembly quality of the product; 4) The assembly tooling of the present invention has a simple structure, is easy to process, and has a low manufacturing cost.

Claims

1. An assembly tool for hexagon socket invisible bolts, comprising an assembly lower positioning seat (1), an assembly upper positioning seat (2), a positioning core rod (3) and a locking nut (4); After the positioning core rod (3) is installed in the upper positioning seat (2), it is fixed to the lower positioning seat (1) via a locking nut (4); The materials of the positioning seat (1), the assembly positioning seat (2), the positioning core rod (3) and the locking nut (4) are all Cr12MoV, which has a hardness of HRC58-62 after being subjected to quenching and tempering heat treatment. The final surface treatment of the tooling is cleaning and passivation.

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