Which company in Chongqing has the strongest production capacity for non-standard parts processing?

Non-standard products refer to products or equipment that are not manufactured in accordance with unified industry standards and specifications promulgated by the state, but are designed and manufactured by oneself according to their own needs. And the appearance or performance are not in the national equipment product catalog.

Non-standard products:

Refers to products or equipment that are not manufactured in accordance with the unified industry standards and specifications promulgated by the state, but are designed and manufactured by oneself according to their own needs. equipment. And the appearance or performance are not in the national equipment product catalog.

In order to meet the needs of large-scale industrial production, mechanical equipment that has been produced and has proven to have good performance is finalized and serialized, called standard products. According to user requirements, products produced, modified or customized on the basis of standard products are called non-standard products.

Standardized and serialized products are mainly suitable for general-purpose mechanical equipment. In fact, when designing a new industrial device, some equipment is specialized and cannot be found in the existing serialized list. It is necessary to It is independently designed and manufactured, and its future versatility will not be high. This type of equipment is called a non-standard product.

At present, the chemical and petrochemical industries are the main areas where non-standard products are mentioned. Because there are many products in this industry and the processes vary widely, there are also many non-standard products.

Standard parts refer to commonly used parts (parts) that have been completely standardized in terms of structure, size, drawing, marking and other aspects and are produced by professional factories, such as threaded parts, keys, pins, rolling bearings etc. Broadly speaking, it includes standardized fasteners, connections, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. The narrow sense only includes standardized fasteners. The commonly known standard parts in China are the abbreviation of standard fasteners. It is a narrow concept, but the existence of a broad concept cannot be ruled out. In addition, there are industry standard parts, such as automobile standard parts, mold standard parts, etc., which also belong to generalized standard parts.

Non-standard parts are mainly other accessories that are freely controlled by enterprises except that the country has not set strict standard specifications and has no relevant parameter regulations. There are many varieties of non-standard parts, and there is currently no standardized classification. The general classification is as follows:

Metal non-standard parts:

The customer provides drawings, and the manufacturer uses equipment to produce corresponding products according to the drawings, usually mostly molds, with tolerance requirements and smoothness. There is no certain paradigm as specified by the customer. Products completely require corresponding quality control from casting to finishing. The process is complex and highly variable, and the general cost is higher than standard parts.

Non-metal non-standard parts:

It is the processing of some non-metal materials. Such as plastics, wood, stone, etc. In recent years, the development of plastic molds in the injection molding industry has become increasingly sophisticated. The introduction of curved surface design and programming CNC has greatly improved the cost and tolerance level of non-standard processing.

The production process of a product refers to the entire process of turning raw materials into finished products. The production process of mechanical products generally includes:

1. Production and technology preparation, such as process design and design and manufacturing of special process equipment, preparation of production plans, preparation of production materials, etc.;

< p>2. Manufacturing of blanks such as casting, forging, stamping, etc.;

3. Processing, cutting, heat treatment, surface treatment, etc. of parts;

4. Assembly of products such as final assembly , partial assembly, debugging, inspection and painting, etc.;

5. Production services such as supply, transportation and storage of raw materials, purchased parts and tools.

Processing:

The processing of parts includes the production of blanks, as well as the process of performing various mechanical processing, special processing and heat treatment on the blanks to make them into qualified parts. A very small number of parts are processed using chipless processing methods such as precision casting or precision forging. Usually the production of blanks includes casting, forging, welding, etc.; commonly used machining methods include: benchwork, turning, drilling, planing, milling, boring, grinding, CNC machine tool processing, broaching Processing, grinding, honing, etc.; commonly used heat treatment methods include: normalizing, annealing, tempering, aging, conditioning, quenching, etc.; special processing include: EDM forming, wire EDM, electrolytic processing, laser processing, ultrasonic processing, etc. Only by selecting appropriate processing methods based on the material, structure, shape, size, performance, etc. of the parts can the quality of the product be ensured and qualified parts produced.

Inspection:

Inspection is the use of measuring instruments to detect the dimensional accuracy, shape accuracy, position accuracy of blanks, parts, finished products, raw materials, etc., as well as through visual inspection and non-destructive testing , mechanical performance testing and metallographic inspection to identify product quality.

Measuring instruments include measuring tools and measuring instruments. Commonly used quantities include steel rulers, tape measures, vernier calipers, calipers, plug gauges, micrometers, angle rulers, dial indicators, etc., used to detect the length, thickness, angle, outer diameter, aperture, etc. of parts. In addition, thread micrometers, three-pin measuring methods, thread templates, thread ring gauges, thread plug gauges, etc. can be used to measure threads.

Commonly used measuring instruments include buoy-type pneumatic measuring instruments, electronic measuring instruments, electric measuring instruments, optical measuring instruments, three-dimensional coordinate measuring instruments, etc., in addition to being used to detect the length, thickness, and outer diameter of parts In addition to dimensions such as diameter and hole diameter, the shape error and position error of parts can also be measured.

Special inspection mainly refers to detecting internal and external defects of parts. Among them, non-destructive testing is a modern inspection technology that detects internal and external defects of parts without damaging the object being inspected. Non-destructive testing methods include direct visual inspection, radiographic flaw detection, ultrasonic flaw detection, magnetic flaw detection, etc. When used, appropriate methods and testing specifications should be selected based on the purpose of non-destructive testing.

Assembly and debugging:

Any mechanical product is composed of several parts, components and components. According to the specified technical requirements, the process of making the necessary coordination and connection of parts and components to make them into semi-finished products or finished products is called assembly. The process of assembling parts and components into components is called component assembly; the process of assembling parts, components and components into final products is called general assembly. Assembly is the last production stage in the machinery manufacturing process, which also includes adjustment, testing, inspection, painting and packaging.

Common assembly work includes: cleaning, connection, calibration and coordination, balancing, acceptance, and testing.

Warehousing:

In order to prevent loss or damage, finished products, semi-finished products and various materials produced by the enterprise are placed in the warehouse for safekeeping, which is called warehousing.

Inspection should be carried out when entering the warehouse, and inspection records and relevant original records should be filled in; measuring tools, instruments and various tools should be maintained and kept; relevant technical standards, drawings, files and other information Keep it properly; keep the work place and indoors and outdoors clean, pay attention to fire and moisture prevention, and do safety work.