Common defects in the forging process of stainless steel hydraulic joint

In the process of heat treatment of stainless steel pipe fittings, one not careful, stainless steel pipe fittings stainless steel pipe fittings quenching process of the common defects often appear some defects, thus affecting the quality of the products of heat treatment, appear even scrapped, it must take forever China flaring type coupling effect measures to prevent, and to have defects, should be set to save, wenzhou all types of nylon tube below focuses on analysis of common defects in stainless steel pipe fittings quenching process, and make the corresponding preventive and remedial measures.

Defects: overheat and overburn

Cause: the heating temperature is too high or the heating time is too long

Preventive and remedial measures for wing wah bucking joints:

1. Correctly select the quenching heating temperature and heating time

2. The contralateral thermometer is calibrated regularly to prevent overtemperature due to instrument failure

Stainless steel pipe processing

3. Reasonable furnace installation, long pipe, yuhuan full model steel pipe stainless steel to prevent the workpiece and heating body too close

Defect: hardening distortion

Causes:

1. Stainless steel casting workpiece shape asymmetry or thickness disparity

2. The machining stress of yonghua bucking pipe joint is large, which is not eliminated before quenching

3. Uneven heating and cooling

4. Improper heating clamping and cooling of workpiece

5. Transformation of quenching structure

Preventive and remedial measures:

1. Improve the structure of the workpiece, select materials reasonably and adjust the machining allowance

2. Increase the process of preheat or stress removal annealing to carry out reasonable preliminary heat treatment

3. Multiple preheating, pre-cooling quenching, price double-liquid quenching of heilongjiang stainless steel tee joint, grading quenching, isothermal quenching and other operation methods are adopted

4. Correctly operate and properly support and bundle the workpiece for quenching and heating, and disperse cooling

5. Calibrate the deformed workpiece.

About stainless steel pipe parts processing knowledge focus topic, I rely on many years of production of stainless steel pipe parts processing knowledge experience, and consult the relevant information on stainless steel pipe parts processing knowledge opinion is very unique.

1. Forging and pressing method: the end or part of the pipe is punched and extended by the forging machine to reduce the outer diameter. The commonly used forging machine includes rotary forging machine, connecting rod forging machine and roller forging machine.

2. Stamping method: expand the pipe end to the required size and shape on the punch press with the core with taper.

3. Roller method: place the core inside the tube and push and press with the roller around, which is used for circular edge processing.

4. Rolling method: generally no spindle, suitable for the inner round edge of thick wall tube.

5. Bending forming method: there are three methods more commonly used, a method called stretch method, another method called stamping method, the third roller method, there are 3-4 rollers, two fixed rollers, an adjustment roller, adjust the distance of the fixed roller, finished elbow is bent.

6. Swelling method: one is to place rubber in the tube, and use punch to compress the top to make the tube protrude into shape;Another method is called hydroforming, in which liquid is filled in the middle of the pipe and the pressure of the liquid pushes the pipe into the desired shape. This method is used in most bellows production.