How to improve the quality of car spring?
Spring is now a necessary item in production and life, now there are many enterprises fancy the market, vigorously produce, trust many people will ask how to improve the quality of spring? In fact, the factors that affect the output value of spring can be roughly divided into: drawing process, production arrangement and equipment reasons, the following are introduced to us respectively.
1, how to optimize the drawing process, equipment, drum number under the condition of must, then stick to the total compression rate constant, the decrease of the appropriate part of the compression ratio, proper added gallas drawing number, especially reduce the last part 1 original compression ratio, can change the state of stress distribution inside the wire, the tensile strength reduced constantly, plastic goal is on the rise, Product qualified rate will be greatly improved.
2, in the process of drawing, the sliding friction between spring steel wire and wire drawing die, could lead to uneven deformation of wire in the die hole, and can produce large amounts of heat, add the amount of energy consumption, the demand to use wire drawing powder to dry and good liquidity, drawing together Also needs often mixing, it can avoid wire drawing powder coking. In the process of drawing, ensure that the cooling channel of the mold box and drum is unobstructed, can adhere to enough flow, and adhere to the mold box dry and clean. The reel of the wire drawing machine uses internal narrow slit water cooling and external forced air cooling. The product reel uses internal spray water cooling and external annular gap forced air cooling. The hardness is lower, the water pressure is 0.2-0.3MPa, and the temperature is not more than 30℃.
3, in the spring production needs strict control in the process of "three temperature a speed", is to control good lead temperature, temperature, wire line temperature, running speed in the furnace, it can reduce the oxidation of steel wire appearance, to avoid the steel wire hanging lead, together to strengthen the administration of the lead tank can ensure lead liquid surface sealed, pan steel wire in the lead of crossover operation. In addition, the need to control the broken end, scattered head, prohibited parking line