The production process of precision steel pipes, the process flow of precision steel pipes and the d

The production process of precision steel pipes is generally divided into the following steps:

<>1.Material preparation: select high-quality steel, such as carbon steel, alloy steel, etc. as raw materials, and test the chemical composition and physical properties.

2.Hot rolling processing: hot rolling processing is used to hot-roll raw materials into tube blanks.

3.Cleaning treatment: Pickling and other cleaning treatments are carried out on the hot-rolled tube blanks to remove harmful substances such as oxide scale, paint and rust.

4.Cold drawing processing: The cleaned tube blank is gradually drawn into a hollow tube of the required diameter and length through the cold drawing process, and its wall thickness and diameter dimensional accuracy are tested at the same time to ensure that it meets the standard requirements.

5.Annealing treatment: annealing treatment is carried out on the tube after cold drawing to eliminate internal stress and improve the strength and plasticity of the steel pipe.

6.Surface treatment of steel pipes: The surface of steel pipes can be treated by polishing or sandblasting to improve the finish and anti-corrosion performance of steel pipes.

7.Final inspection and packaging: The final inspection of the finished steel pipe is carried out, and the dimensional accuracy, roundness, wall thickness and other standards are checked, as well as mechanical properties and chemical composition, etc. Finally, the packaging is completed, and it is sorted, shipped out and shipped according to different specifications, uses and customer requirements.

The production process of precision steel pipes is the same as that of ordinary seamless pipes, which is an additional process of final pickling and cold rolling.

Precision steel pipe process.

Tube blank - inspection - peeling - inspection - heating - perforation - pickling and passivation - grinding - lubrication and air drying - cold rolling - degreasing - cutting head - inspection - identification - finished product packaging.

Wuxi Duorunde steel pipe**** (I will answer);The difference between precision steel pipe process and seamless precision steel pipe The process flow of precision steel pipe mainly includes the following steps

Automobile manufacturing, military industry, mechanical processing, electronic equipment, medical equipment, construction machinery, railway locomotives, aerospace, ships, injection molding machines, die-casting machines, machine tool processing, diesel engines, petrochemical plants, power stations, boiler equipment, Wuxi Duorunde steel pipes;Official website

Steelmaking: First of all, the steel ingot needs to be melted and some alloying elements such as chromium, nickel, silicon, etc., to increase the corrosion resistance and hardness of the steel pipe. Continuous casting:

Heat treatment: The rolled steel pipe is subjected to high temperature treatment to eliminate internal stress and improve its strength and hardness.

2..Finishing: Finishing the heat-treated steel pipe, including polishing, cutting, straightening and other steps to achieve the required precision and surface finish.

Ingot forging: A high-temperature steel ingot is put into a mold and forged multiple times through a forging machine to control its shape and dimensional accuracy.

3.Heat treatment: The forged steel pipe is subjected to high temperature treatment to eliminate internal stress and improve its strength and hardness.

Finishing: Finishing the heat-treated steel pipe, including polishing, cutting, straightening and other steps to achieve the required precision and surface finish.

Quality inspection: Conduct quality inspection on the processed steel pipes, including size, surface, non-destructive testing, etc., to ensure that the products meet the quality requirements. Livery:

Finally, the steel pipe is coated to protect the surface from oxidation and corrosion. In contrast, the production process of seamless precision steel pipes is more complex, the cycle is longer, and the cost is higher, but it has higher precision and finish, and is more suitable for use in high-precision and high-demand fields.

Cold-rolled steel pipes are divided into cold-rolled welded pipes and cold-rolled seamless pipes.

Strip coil - feeding, uncoiling - pinch ing, leveling - shearing, butt welding - looper storage - forming - extrusion, welding - inner and outer burr removal - calendering - cooling - weld flaw detection - sizing - cutting off to length - flat head, chamfering - cleaning (drying) - straightening - non-destructive testing - inspection, spraying - weighing, warehousing.

2) Welded and drawn precision tubes for the cylinder barrel of car shock absorbers.

Plate and strip coil - precision welded pipe - micro oxidation heat treatment - pickling, lubrication - shrinking pipe - cold rolling (drawing) - precision straightening - cutting head, chamfering - non-destructive testing - inspection - anti-rust treatment, packaging - weighing, warehousing.

3) Cold-drawn precision seamless steel pipe.

Round tube blank - pickling, inspection - shearing - heating - perforation - rolling - cooling - inspection (grinding) - (micro oxidation heat treatment) - pickling, lubrication - tube shrinking - cold drawing - bright heat treatment - precision straightening - cutting head, chamfering - nondestructive testing - inspection - anti-rust treatment, packaging - scale, warehousing.

4) Cold-rolled precision seamless pipe: round tube blank - inspection - shearing - heating - perforation - rolling pipe - cooling - inspection - pickling, lubrication - cold rolling mill rolling - oxygen-free heat treatment - precision straightening - cutting head, chamfering - non-destructive testing - inspection - anti-rust treatment, packaging - weighing, warehousing.

The outer diameter and inner bore of precision steel pipe are high, and seamless steel pipe contains precision steel pipe.

The process of manufacturing and processing steel pipes is as follows.

Method steps.

a.Sample production: In order to facilitate inspection and ensure the accuracy of the production and installation of steel pipes and various pipe parts, it is adopted.

Galvanized steel sheet to make a sample. According to the design requirements, the inner diameter of the steel pipe radian inspection, support rings, stiffening rings, etc. must be made of the model, and the arc length of the model must meet the requirements of the specification (according to the different pipe diameters, the arc length of the model is.

After the model is made, it must be inspected by a professional constructor and marked at the same time to prevent mixing in the process of use. Elbows and elbows are directly lofted on the spliced steel plate by ground gauge, steel ruler, etc., and can be unloaded only after being checked by professional constructors, quality personnel or technical leaders.

b.Steel plate splicing and blanking: According to the design requirements, combined with the actual situation of the site, all the steel plates used to make steel pipes are fixed-length steel plates, and there is a small margin on the long and wide sides; In order to ensure that the circumference error of the steel pipe is controlled within the minimum range, the method of blanking after splicing two fixed-length plates is adopted; The splicing is welded by carbon dioxide protection welding process, and the side length should be checked before splicing, whether the wide side is vertical and the long side is perpendicular, and at the same time, the steel plate is trimmed with an oxygen-acetylene flame cutter to ensure that the width of the steel plate is consistent with the design, and the slag, burrs and notches on the cutting and planing surface should be ground off with a grinding wheel, and all the edges of the plate after processing shall not have defects such as cracks, interlayers and slag inclusions; Place both sides of the weld before welding.

The rust, slag, oil scale, water stains, etc. in the centimeter range are cleaned and welded only after passing the inspection; When the unilateral welding is completed, the steel plate is slowly turned over with a gantry crane, and the roots are cleaned and polished with an arc before continuing to weld.

c.The spliced steel plate is determined according to the different thickness of the plate, and the drawing is drawn on the steel plate at the same time, and the parallel lines and diagonals are carefully checked, and the material can be cut only after the inspection is correct; The blanking is cut with an oxygen-acetylene flame cutter. Pipe fittings such as elbows and gradient pipes are the same as those of steel pipes.

First of all, use the computer to draw the plan of the elbow pipe shell and find the points. x-axis and.

After the coordinates on the y-axis, the chord length of each datum point will be obtained; In the actual lofting, the two steel plates are butt, the length is greater than the chord length of the maximum mouth, and the width is the actual height of the small mouth chord plus the steel pipe, at the same time, draw each coordinate point on the steel plate, smoothly connect the coordinate points, carefully check whether the arc length of the branch pipe and the main pipe connection is the same, and the material can be cut only after checking.

d.After blanking, the groove at the weld is cut with an oxygen-acetylene flame and then ground with an angle grinder.

Pipe fittings such as elbows and gradient pipes are the same as those of steel pipes. When lofting and blanking the plate, the cutting allowance and welding shrinkage margin of the plate should be considered.

3-4mm.

It is first burned into molten steel, in a large sealed box, baked in a furnace, and finally put in cold water.

Square tube or round tube? with electric or liquid press brakes.

Summary. Dear, quality managementQuality management is the focus of all management activities of the company, is the foundation of enterprise development, product is the vitality of the enterprise, quality management needs all employees of the company to participate, control, and fully implement. The company's quality management system is the basic system that all employees of the company must abide by, and the production quality management is applicable to all production employees of the company and other employees related to production.

The key to production quality management is to do a good job in the prevention of quality variation, prevent occasional quality variation, and gradually improve frequent quality variation. Before the production of the product, the production manager must conduct spot checks on the materials to prevent the materials from being unqualified. In the process of product production, production managers should strengthen quality inspections to eliminate factors such as improper operation methods of employees, poor operation of machinery and equipment, and logistics disorders.

Dear, precision steel pipe factory management process: production process management: production process management is the focus of production control, is an important means to ensure the control of production of silver beam certificates, and is a necessary measure to reduce resource loss.

The management of the production process is an advanced management method that uses scientific management techniques to carry out production management, rationally utilizes production resources, reasonably deploys production personnel, and ensures timely production.

Pro, logistics managementLogistics control is a prerequisite for production management, and reasonable logistics control is the premise for high efficiency and high utilization. Whether the logistics control is reasonable or not is directly related to whether the production is smooth, whether the material waste is serious or not, and the level of production cost. The material organization includes the finished product warehouse, material warehouse, tool warehouse and the company's fleet of each workshop.

The finished product warehouse is the storage institution of the finished product, which is responsible for the receipt and storage of the finished product; The material warehouse is the storage institution of raw materials, responsible for the receipt and delivery of raw materials, and storage: the tool warehouse is a storage institution for tools and molds, which is responsible for the sending, receiving, storage and maintenance of tools and molds: the fleet is the company's transportation agency and is responsible for all transportation affairs of the company.

Dear, quality managementQuality management is the focus of all the company's management activities, is the foundation of enterprise development, product is the company's life force, quality management needs the participation of all employees of the company, control, and full implementation. The company's quality management system is the basic system that all employees of the company must abide by, and the production quality management is applicable to all production employees of the company and other employees related to production. The key to production quality management is to do a good job in the prevention of quality variation, prevent occasional quality variation, and gradually improve frequent quality variation.

Before the production of the product, the production administrator must conduct spot checks on the materials to prevent the materials from being unqualified. In the process of product production, production managers should strengthen quality inspections to eliminate factors such as improper operation methods of employees, poor operation of machinery and equipment, and logistics disorders.