What is brought to you today is the assembly requirements for mechanical parts.
1. Each seal must be saturated with oil before assembly.
2. The assembly of rolling bearings allows for hot charging with oil heating. The temperature of the oil must not exceed 100 °C.
3. After gear assembly, the contact spots and side gaps of the tooth surface shall comply with the provisions of GB10095 and GB11365.
4. Seal packing or sealant is allowed when assembling the hydraulic system, but should be prevented from entering the system.
5. Parts and components (including purchased parts and external parts) that enter the assembly must have a certificate from the inspection department for assembly.
6. Parts must be cleaned and cleaned prior to assembly without burrs, flash, scale, rust, chips, oil, colorants and dust.
7. Before assembly, check the main fit dimensions of the parts and components, especially the interference fit size and related accuracy.
8. Parts are not allowed to rub, touch, scratch and rust during assembly.
9. When tightening screws, bolts and nuts, it is strictly forbidden to strike or use improper screwdrivers and wrenches. The screw groove, nut and screw, and the head of the bolt must not be damaged after tightening.
10. Fasteners that specify the tightening torque requirements must be torque wrenched and tightened to the specified tightening torque.
11. When the same part is tightened with multiple screws (bolts), each screw (bolt) should be crossed, symmetrical, stepwise, and evenly tightened.
12. When the tapered pin is assembled, the hole should be inspected with color. The contact rate should not be less than 60% of the length of the fit and should be evenly distributed.
13. The flat key and the upper side of the keyway should be evenly contacted, and there should be no clearance on the mating surface.
14. The number of flank contacts in the spline assembly is not less than 2/3, and the contact rate shall not be less than 50% in the length and height direction of the key teeth.
15. After the sliding flat key (or spline) is assembled, the phase accessories move freely without any unevenness.
16. Remove excess adhesive from the adhesive after bonding.
17. The outer ring of the bearing and the semi-circular hole of the open bearing housing and bearing cap are not allowed to jam.
18. The outer ring of the bearing should be in good contact with the semi-circular hole of the open bearing seat and the bearing cap. When the color is inspected, the bearing housing should be 120° symmetrical to the center line and the bearing cover should be 90° symmetric to the center line. Even contact. When using a feeler gauge within the above range, a 0.03 mm feeler gauge shall not be inserted into 1/3 of the width of the outer ring.
19. After the outer ring of the bearing is assembled, it should be in even contact with the end face of the bearing end of the positioning end.
20. After the rolling bearing is installed, it should be flexible and stable by hand rotation.
21. The joint surface of the upper and lower bearing pads should be closely attached and inspected with a 0.05mm feeler gauge.
22. When fixing the bearing bush with the positioning pin, the hinge and the pin should be drilled while ensuring that the face and end face of the pad are in flush with the opening and closing faces of the relevant bearing hole. Do not loosen after the pin is inserted.
23. The bearing body of the spherical bearing should be in uniform contact with the bearing housing. Check with the coloring method, the contact should not be less than 70%.
24. When the surface of the alloy bearing lining is yellow, it is not allowed to use. The nuclear separation phenomenon is not allowed within the specified contact angle. The area outside the contact angle shall not be greater than 10% of the total area of the non-contact area.
25. The reference end face of the gear (worm gear) and the shoulder (or the end face of the positioning sleeve) should be fitted together and inspected with a 0.05 mm feeler gauge. The verticality requirement of the gear reference end face and the axis should be ensured.
26. The joint between the gearbox and the cover should be in good contact.
27. Strictly inspect and remove sharp corners, burrs and foreign objects remaining during part processing before assembly. Ensure that the seal is not scratched when it is installed.
