Forging process Plan of Valve body of forging Factory
The valve body of the forging factory is a key component of the gate valve of petroleum equipment, which has different forming methods according to the pressure level, such as forging, forging and so on.
Valve body materials for different processing materials, using different types of raw materials, common materials are: pig iron, steel castings, stainless steel plate, alloy tool steel and so on.
Valve body forging is divided into press free forging and electro-hydraulic hammer free forging. According to the free forging forming, a variety of processing schemes are analyzed, and an ideal forming process of valve body forgings is obtained.
Process Planning of forging Valve body Forgings in forging Factory.
The two sides of the valve body of the forging factory are flanged, and there are two symmetrical circular punches in the middle position, and the irregular figure design scheme is in the middle of the two punches, and proper edge collapse is allowed in the forging link.
The integrated design is eccentric wheel structure, the raw material is steel casting, and the product material is AISI4130.
The net weight of commodity parts is 1050kg because of the large size of forgings and the large ingot shape of commonly used steel castings.
In order to ensure that the core of the steel casting is forged through, the inclusions in the internal structure and the crystal mechanism of the reticular structure can be effectively destroyed, and the loose defects can be welded effectively, so the forging environment temperature section should be manipulated.
The higher the forging temperature, the easier it is to forge the internal structural defects of steel castings, so it is necessary to keep forging at high temperature.
When forging forgings with steel castings, forging ratio must be taken into account. The whole forging process of valve body forging billet of forging factory is basically divided into forging ratio control and forging blank forming.
The 6t rotary cylinder is selected according to the forging capacity of the forging machine and the material specification of the forgings, and the heating equipment is selected as the natural gas furnace. the initial forging temperature of the forging raw materials is 1180 ℃, the final forging ambient temperature is 850 ℃, and the cooling mode after forging is pit cooling.
Processing process plan of forging valve body.
Because the appearance of the forgings is complicated and the overall forging difficulty is high, according to the characteristics of the parts, our processing staff also analyze the forming feasibility and integrate the specific production conditions of our company. Study and deploy three kinds of valve body forging process plans.
Option one.
It is immediately forged into a lattice rough embryo with a specification of 492mm × 657mm × 915mm, which is cooled after forging, marked on the forging blank, and finally sawed on the CNC sawing machine.
Option 2.
First forge into a connecting lattice rough embryo, the forging square cross section is 510mm × 690mm, ensure the key size of the middle grid, imprint on both sides of the billet with stainless steel rod, carry out manual material division with the chopper on the basis of the imprint position, then carry out shoulder drawing, then put the forging blank into the valve body abrasive for surface plastic surgery and cosmetology, then flatten the two sides of the valve body, and then the rough embryo is formed into a three-section square.
Option 3.
The rough embryo is forged into a cylindrical shape, and the diameter of the cross section circle is φ 480mm. The upper end and bottom edge of the rough embryo are respectively wrapped with the grinding tool ring, and upsetting along the forging blank axis direction. When the forging square reaches the process size, the forging blank and the grinding tool ring are placed horizontally on the hammer anvil to forge the rough embryo axial force structure.
Finally, the grinding tool rings on both sides are removed, and the rough embryo is flattened to ensure that the process size and surface quality of the forgings meet the requirements.
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