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What are the precautions for storing high-precision cold-drawn tubes?
Using cold drawing method to produce high-precision cold drawn pipe-hydraulic cylinder block has the following characteristics compared with traditional cutting technology:
1. High production efficiency: It takes 154 hours to produce a cylinder with an inner diameter of 420 mm and a length of 12 meters using the traditional method, but only 4 minutes using the cold drawing method.
2. High product rate: Since the boring rolling head also serves as a guide, during the cutting process, the blank tube deflects due to its own weight, causing the rolling head and boring tool to deviate, resulting in scrap. The quality rate can only reach about 60%, but when produced by cold drawing method, the quality rate can reach 95%.
3. High metal utilization rate: Using traditional boring methods to manufacture cylinder blocks, the metal utilization rate is only 50-70%. When produced by the drawing method, the metal is not cut into iron powder, but can be stretched by 30%, and the metal utilization rate can reach 95%.
4. It can enhance the mechanical properties of the finished pipe metal: it is produced by drawing method, so that the blank can obtain 30% plastic deformation, and the strength limit of the finished pipe metal is greatly increased due to work hardening. Generally, the inner strength limit of finished pipes can reach 60%.High precision cold drawn tubeSeamless hot-rolled steel pipes and straight seam welded pipes are used as blanks. After chemical treatment, they are drawn on a cold drawing machine through a mold designed according to the special deformation principle to produce high-precision pipes.
High-precision cold drawn tubes can be selected from suitable sites and warehouses:
1. The site or warehouse where steel materials are stored should be in a clean place with smooth drainage and away from factories and mines that produce harmful gases or dust. Clean up debris on the site and keep the steel clean.
2. It must not be stacked together with acid, alkali, salt, cement and other materials that are corrosive to steel in the warehouse. Different types of steel should be stacked separately to avoid confusion and contact corrosion.
3. Large steel sections, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked in the open air.
4. Small and medium-sized steel, wire rods, steel bars, medium-diameter steel pipes, steel wires and steel wire ropes, etc., can be stored in well-ventilated sheds, but they need to be covered with covers.
5. Some small steel products, thin steel plates, steel strips, silicon steel sheets, small diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steel products, and high-priced and corrosive metal products can be stored in the warehouse.
6. The warehouse should be selected based on geographical conditions. Generally, ordinary closed warehouses are used, that is, warehouses with walls on the roof, tight doors and windows, and ventilation devices.
7. The warehouse is required to be ventilated on sunny days, closed to prevent moisture on rainy days, and a suitable storage environment must be maintained at all times.
1. High production efficiency: It takes 154 hours to produce a cylinder with an inner diameter of 420 mm and a length of 12 meters using the traditional method, but only 4 minutes using the cold drawing method.
2. High product rate: Since the boring rolling head also serves as a guide, during the cutting process, the blank tube deflects due to its own weight, causing the rolling head and boring tool to deviate, resulting in scrap. The quality rate can only reach about 60%, but when produced by cold drawing method, the quality rate can reach 95%.
3. High metal utilization rate: Using traditional boring methods to manufacture cylinder blocks, the metal utilization rate is only 50-70%. When produced by the drawing method, the metal is not cut into iron powder, but can be stretched by 30%, and the metal utilization rate can reach 95%.
4. It can enhance the mechanical properties of the finished pipe metal: it is produced by drawing method, so that the blank can obtain 30% plastic deformation, and the strength limit of the finished pipe metal is greatly increased due to work hardening. Generally, the inner strength limit of finished pipes can reach 60%.High precision cold drawn tubeSeamless hot-rolled steel pipes and straight seam welded pipes are used as blanks. After chemical treatment, they are drawn on a cold drawing machine through a mold designed according to the special deformation principle to produce high-precision pipes.
High-precision cold drawn tubes can be selected from suitable sites and warehouses:
1. The site or warehouse where steel materials are stored should be in a clean place with smooth drainage and away from factories and mines that produce harmful gases or dust. Clean up debris on the site and keep the steel clean.
2. It must not be stacked together with acid, alkali, salt, cement and other materials that are corrosive to steel in the warehouse. Different types of steel should be stacked separately to avoid confusion and contact corrosion.
3. Large steel sections, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked in the open air.
4. Small and medium-sized steel, wire rods, steel bars, medium-diameter steel pipes, steel wires and steel wire ropes, etc., can be stored in well-ventilated sheds, but they need to be covered with covers.
5. Some small steel products, thin steel plates, steel strips, silicon steel sheets, small diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steel products, and high-priced and corrosive metal products can be stored in the warehouse.
6. The warehouse should be selected based on geographical conditions. Generally, ordinary closed warehouses are used, that is, warehouses with walls on the roof, tight doors and windows, and ventilation devices.
7. The warehouse is required to be ventilated on sunny days, closed to prevent moisture on rainy days, and a suitable storage environment must be maintained at all times.