Craft of treatment of typical casing spare parts is analysed (below)

5/1000; 2. To adding up to the exterior surface roughness of the face the value is less than Ral.

6 μ M, two do not exceed 0 to closing the joint gap of the face.

03mm; 3. Kong Bi must be in bearing bearing to go up to combining an aspect, the error does not exceed ± 0.

2mm; 4. The dimension public errand of bearing bearing aperture is H7, exterior surface roughness is worth be less than Ral.

6 μ M, cylinder spends an error not to exceed bore diameter public errand, pitch precision error is ± 0.

05~0.

08mm. (2) if the process of the casing of detached type of craft characteristic 　 of detached type casing expresses place of 8-12 of 8-11 of 8-10, watch, watch to show. The fixed position of content of working procedure of process serial number that expresses 8-10 box top is standard 10 cast 20 effectiveness for a given period of time 40 jack plane are opposite 30 besmear priming paint 50 dig end face checks area of A of flange combining an aspect combine an aspect 60 wear pair of end face combining an aspect 70 get aperture of combinative scale connection to be opposite add up to outline of face, flange 80, infiltrate awl is sold, deserve to get base according to the lid, tie the join hole of the face, huo heavy aperture 20 ravel lid and base, long burr, heavy new clothes matchs casing, the awl that lay a person is sold, screw bolt. Underside of two end panel reachs 30 mill two aperture aperture of bearing of bearing of 40 thick boring, cut face of the bottom land inside aperture to reach two aperture aperture of bearing of bearing of 50 essence boring, cut face of the bottom land inside aperture to reach two aperture 60 go burr, clean, make number 70 examine to be seen by the watch, although detached type casing follows the treatment principle of general casing, but the dissociable sex that goes up as a result of the structure, be in consequently of craft course draft and locate fiducial choice respect all has a few characteristics. 1.

Course of craft of casing of type of treatment course depart and the main distinction that make line of craft of casing of form of characters or letters depend on: Cent of whole treatment process is two large stage. The first phase is built to box first and base undertakes machining respectively, basically be over to add up to face and other plane in couples, the treatment of aperture of fixed position of the Konghe that tighten solid, be casing close pretend to prepare; The 2nd phase is joining end panel of Kong Jiji of the treatment on the casing that has installed. Benchwork working procedure is arranged between two phase, case lid and base close install casing, use two sell fixed position, make its maintain proper positional relationship, the repetition that tears open outfit hind in order to make sure the treatment precision of bearing aperture is mixed precision. 2.

Fixed position is standard 　 (1) is thick casing of fiducial choice depart type most what machine first is box top and box to combining an aspect. Detached type casing cannot serve as with the semifinished product face of bearing aperture commonly thick fiducial, do not machine a face to be with flange however thick fiducial, namely box is built with flange A face, base is with flange B face thick fiducial. Can make sure thickness of pair of flange combining an aspect are even so, reduce casing to close be opposite when outfit combine an aspect be out of shape. (Of the casing of choice depart type with 2) fiducial essence to adding up to face and underside (assemble tool reference plane) the dimension precision with have certain and requirement of mutual position precision; Aperture axes should be in bearing to go up to combining an aspect, also have certain dimension precision and demand of mutual position precision with underside. To make sure above asks a few times, those who machine base is right when combining an aspect, should be essence of life with underside fiducial, the fixed position when making be machined to combining an aspect is standard as fiducial as the design coincide; When casing adds up to aperture of bearing of the treatment after outfit, still be main fixed position with underside fiducial, constitute a pattern with the aperture of two fixed position on underside " at the same time two aperture " orientation way. Such, the treatment of bearing aperture, its fixed position is standard accord with already " fiducial and unified " principle, also accord with " fiducial coincide " principle, be helpful for making sure bearing aperture axes and the registration to combining an aspect are reached spend all right with the dimension precision peace that assembles tool reference plane. CNC Milling