Assembly method of the shaft hole
An assembly method and shaft hole technology, applied in metal processing equipment, metal processing, manufacturing tools, etc., can solve the problems of smaller aperture, loose axial limit, and smaller shaft length.
Active Publication Date: 2022-05-13
WUHAN SHIP IND
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Problems solved by technology
[0004] However, in the cooling process of the reel, not only its hole diameter will become smaller, but also its axial length will also become smaller, which will cause the axial limit between the reel and the mandrel to loosen, and then cause the reel and the mandrel to loosen. Axial assembly accuracy between mandrels is compromised
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[0050] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0051] Existing a large reel 200 assembly, figure 1 For a cutaway view of the jumbo drum 200 assembly, see figure 1 , which mainly includes a mandrel 100 and a reel 200 , the mandrel 100 is coaxially inserted into the reel 200 , and the transition fit or interference fit between the mandrel 100 and the reel 200 . The length of the drum 200 is 7000 mm, and the inner diameter of the shaft hole in the drum 200 for accommodating the mandrel 100 is 1020 mm.
[0052] Due to the transition fit or interference fit between the mandrel 100 and the reel 200 , and the interference is relatively large, it is necessary to adopt the assembly method of shrink fitting. Shrink packing refers to using the principle of thermal expansion and contract...
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Abstract
The disclosure provides an assembly method of a shaft hole, which belongs to the field of mechanical assembly. The assembling method includes: providing a mandrel such that the mandrel includes a shoulder, a first mating shaft section and a second mating shaft section coaxially connected together, the shoulder is coaxially connected to an outer peripheral wall of the first mating shaft section, and away from the second mating shaft section; the reel is provided so that the reel includes a coaxially arranged first mating shaft hole and a second mating shaft hole, the minimum interference between the first mating shaft hole and the first mating shaft section , greater than the maximum interference between the second mating shaft hole and the second mating shaft segment; heating the reel; inserting the mandrel into the reel so that the shaft shoulder is in contact with the end of the first mating shaft hole, the first The cooperating shaft section is located in the first cooperating shaft hole, and the second cooperating shaft section is located in the second cooperating shaft hole; the cooling drum. The disclosure can ensure the axial assembly accuracy of the shaft and the hole during shrink fitting.
Description
technical field [0001] The disclosure belongs to the field of mechanical assembly, in particular to an assembly method of a shaft hole. Background technique [0002] The assembly between the shaft and the hole is a relatively common assembly method in the field of mechanical assembly. [0003] There is a large mandrel assembly which involves the assembly between the mandrel and the mandrel. Due to the interference fit between the reel and the mandrel, and the interference is large, it is necessary to adopt the assembly method of shrink fitting. Thermal packing refers to using the principle of thermal expansion and cold contraction to heat the reel, so that the aperture in the reel is enlarged to facilitate the insertion of the mandrel. After the mandrel is inserted, the mandrel is cooled to restore the aperture in the mandrel to complete the assembly between the mandrel and mandrel. [0004] However, in the cooling process of the reel, not only its hole diameter will beco...
Claims
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IPC IPC(8): B23P11/02
CPCB23P11/02
Inventor 路明明张世平刘培军
Owner WUHAN SHIP IND