1. First of all, in the machining process, there should be no scratches, scratches and other defects that damage the surface of the parts on the surface of the parts. Scale should be removed from the parts; the unmarked shape tolerance should meet the requirements of GB1184-80, the allowable deviation of the unmarked length dimension is ±0.5mm; the casting tolerance zone is symmetrical to the basic size configuration of the blank casting.
2. The rolling bearing assembly in machining is allowed to use oil heating for hot charging. The temperature of the oil should not exceed 100 °C. Sealing packing or sealant is allowed to be used when assembling the hydraulic system, but it should be prevented from entering the system. Parts and components that enter the assembly are all Assembly must have a certificate from the inspection department. Shenzhen Machining Plant Shenzhen Machining Plant
3. The parts must be cleaned and cleaned before assembly, and there must be no burrs, flashes, oxide scales, rust, chips, oil, colorants and dust, etc. Before assembly, the main matching dimensions of parts and components should be dealt with, especially the interference fit The dimensions and related accuracy are reviewed; the parts are not allowed to be knocked, touched, scratched and rusted during the assembly process.
4. When tightening screws, bolts and nuts during machining, it is strictly forbidden to strike or use inappropriate screwdrivers and wrenches. After tightening, the screw grooves, nuts, screws, and bolt heads shall not be damaged; the fasteners with the specified tightening torque must be tightened with a torque wrench and tightened according to the specified tightening torque. After bonding, the excess adhesive that flows out should be removed. .
5. The outer ring of the bearing and the semi-circular hole of the open bearing seat and the bearing cover are not allowed to be stuck; the outer ring of the bearing and the semi-circular hole of the open bearing seat and the bearing cover should be in good contact. It should be in uniform contact with the bearing cap within a range of 120° symmetrical to the centerline and 90° symmetrical to the centerline. When checking with a feeler gauge within the above range, a 0.03mm feeler gauge shall not be inserted into 1/3 of the width of the outer ring.
6. After the bearing outer ring is assembled, it should be in even contact with the end face of the bearing cap of the positioning end. After the rolling bearing is installed, it should be flexibly and smoothly rotated by hand. When the pin is used to fix the bearing bush, the hinge should be drilled and the pins should be arranged under the condition that the mouth face and end face of the bush are flush with the opening and closing face and end face of the relevant bearing hole. The pins must not be loosened after being driven in.
7. When the surface of the alloy bearing lining is yellow, it is not allowed to use, and the phenomenon of denucleation is not allowed within the specified contact angle. The denucleation area outside the contact angle shall not be greater than 10% of the total area of the non-contact area. The gear (worm gear) benchmark The end face and the shaft shoulder (or the end face of the locating sleeve) should fit together, and check with a 0.05mm feeler gauge. And the verticality requirements of the gear reference end face and the axis should be guaranteed.
8. The molding sand, core sand and core bone on the casting should be cleaned. The casting has inclined parts, and the dimensional tolerance zone should be symmetrically arranged along the inclined plane. The casting is not allowed to have cold partitions, cracks, holes, etc. that are detrimental to the use. Casting defects. All steel surfaces that need to be painted must be removed from rust, scale, grease, dust, mud, salt and dirt before painting. Shenzhen Machining Factory
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