What are the inspection regulations for the appearance of hydraulic cylinders?

What are the inspection regulations for the appearance of hydraulic cylinders?

①The outer surface of the hydraulic cylinder does not need to have such shortcomings as expansion and contraction and significant wave lines, cracks, vibration lines, knocks, scratches, rust, etc.

②Coating, passivation treatment layer, paint film, etc. should be used to prevent rust (rust) from the exposed surface. The coating should have no defects such as cracks, peeling, falling or cavitation; the surface layer should be anti-rust treatment or air-scaled before painting, without rust pits.

③Wipe the anticorrosive paint before painting. The coating should be well-proportioned, consistent in color and smooth and smooth. Do not apply putty powder before painting.

Let’s talk about the technical regulations for safe production of hydraulic cylinders.

The design and manufacturing of hydraulic cylinders must provide basic safety assurance for customers' applications within the required service life. All kinds of hydraulic machinery will have risks in adjustment, application and maintenance. Therefore, customers can reduce or eliminate risks only by adjusting, applying and maintaining the hydraulic machinery according to the safe production technical conditions or regulations.

① For necessary hydraulic cylinders used in unique places, risk assessment should be carried out when designing the scheme.

② Risk reduction measures should be adopted during design and manufacturing, such as reliable tightening measures for various standard parts.

③In view of the risks that cannot be prevented by the hydraulic cylinder design and manufacturing, such as the accidental stroke arrangement and weight accidental landing of the rail slider (driven by the hydraulic cylinder), the automobile manufacturer should adopt safety precautions, including wind (dangerous) Risk warning.

④For more practical safety production technical regulations (standards), please refer to the relevant regulations and follow them in various aspects.

What is in the advance preparation of the hydraulic cylinder assembly line?

① Prepare sample drawings, technical documents and work specific guidance documents in advance according to the production and manufacturing orders of people's hydraulic cylinders.

②According to the mass production of the assembly line, all parts and components should be prepared at one time according to the list column of the assembly drawing or the statistical table.

③Re-check the key fit tolerances of the parts and components, and select the sorting method assembly line to start the sorting of the parts; check the qualification certificates of outsourcing and key parts to ensure that all the parts and components entering the assembly line are within the reasonable application period Qualified product.

④ Adjustable stroke arrangement The stroke arrangement adjustment of the cylinder should be sensitive and reliable in the work of the organization, and meet the precision requirements.

⑤The surface layer and the mating surface of the key parts and components are not allowed to have defects such as rust, scratches, bumps and bumps. All hydraulic seals (including anti-fouling seal rings, flat washers, support plate rings, etc.) must not be damaged.

⑥Vibration lines must be removed before the assembly line of each part of the hydraulic cylinder. The obtuse angles and sharp edges not shown in the sample diagram should be dull (but not including the sealing tube groove edge).

⑦Clean all parts and components carefully and carefully, and achieve cleanliness regulations, but does not include hydraulic seals.

⑧The cleaned hydraulic cylinder parts and components should be dry before starting the assembly line; the parts and components that cannot be assembled immediately should be encapsulated or covered with plastic cloth (film).

⑨ Do a good job of checking and filing the special tools, processing technology equipment, low-value and easy-to-consumption etc. used in the hydraulic cylinder assembly line.