The shear extrusion forming process is a metal plastic processing process dominated by shear deformation. The basic mechanical characteristic of the forming process is that it can reduce the extrusion pressure and the cap degree. Therefore, the tonnage of equipment required in the forming process is greatly reduced. Figure l is the schematic cylinder diagram of cutting extrusion forming of branch parts. The dotted line in the figure shows the position of shear deformation zone during shear extrusion forming. Except for large shear deformation near the dotted line. The rest of the whole blank is deformed in other ways. Under the action of the punch. The metal in the middle of the two shear bands flows to the die cavity in an approximately translational manner, forming branches. For the globe valve body with two forks as shown in Figure 2. The upper branch fork is first cut and extruded to form the lower branch fork. The forming of two branches fork can be completed in one stroke of the punch. Before the production process test research of shear extrusion shape of valve body, the physical simulation research is carried out by using t/3 'scale parts, and the reference process parameters of shear extrusion shape are obtained, so as to formulate the production process test parameters. Taking DN100 stop valve body process as an example, the production process test is conducted.

Performance characteristics of compensator:
High temperature resistance, no powder leakage, no powder accumulation, small displacement stiffness; It can absorb arbitrary displacement, and has good flexibility to ensure the boiler and pipe system shrink freely; The device is easy to maintain, the hanger is simple, the service life is long, and the comprehensive investment is low. It is widely used in 100~600MW generating units, and basically solves the problem of coal leakage. The tetrafluoro compensator ensures the operation of the unit.
Scope of application:
It is applicable to primary air, secondary air and tertiary air pipes with pulverized coal, hot and solid two-phase fluid, flow rate of 15 〜 30m/s, working temperature of 60 ℃ - 450 ℃, and wind pressure of ≤ 500mm.
It is applicable to the pipeline system with thermal displacement request of gas-solid two-phase fluid with other solid dust and particles under pressure ≤ 0.25MPa.
The corrugated pipe of the special three-dimensional corrugated compensator for pulverized coal is made of 1Cr18Ni9Ti, and the receiver is made of low-carbon alloy wear-resistant steel, with good welding and wear-resistant properties. For corrugated compensator with nominal diameter of 450mm, wave number of 8 and compensation amount of 200mm, L is the product length.