Flange is also called flange flange or flange. Flanges are parts that connect shafts to shafts and are used to connect pipe ends; they are also used for flanges on the inlet and outlet of equipment and the connection between two equipment, such as reducer flanges.

Several problems should be paid attention to in flange design

Tooling performance requirements

The two flanges of the large flange are vertical, while the worktable of the vertical lathe rotates horizontally, so the main function of the tooling is to use the bolt holes on the large flange to connect the tooling with the flange.

When the tooling is clamped on the workbench, the flange surface to be machined should be concentric and parallel to the workbench of the vertical lathe. In order to reduce the number of tooling, the tooling should be able to change the clamping position to ensure that the flanges at both ends of the elbow can be processed on one tooling. At the same time, the tooling needs to have sufficient rigidity, otherwise it will seriously affect the processing quality of the flange sealing ring groove.

In the case of meeting the requirements of use, the height of the mold should be reduced as much as possible, the rigidity should be improved, and it is easy to operate. After the tooling is fixed with the large flange, the radius of rotation should not exceed the working radius of the vertical lathe, and it can be easily clamped and adjusted, and it is convenient for cutting.

Tooling Design and Manufacturing

The large flange is composed of 2 clamping bottom plates, 2 flange support plates, vertical plates and 4 stiffener plates. In order to ensure the rigidity of the tooling, the welding of the connecting plate should be through slot welding, and the welding angle should be between 20 and 30 mm.

Drill the corresponding bolt holes in the flange plate to ensure that the flange can be connected accurately with the bolts used in the flange plate, there is a gap between the back of the flange and the support plate, a small hand jack can be placed superior. At the same time, a gap is opened on the flange support plate along the direction of the vertical plate, so as to install the elbow into the tooling, and the thick steel plate with an approximate groove structure can meet the rigidity requirements during cutting.

Turning

When processing large flanges, adjust the bottom plate downward, clamp it on the vertical workbench, and manually install the elbow flange on the flange. The large end flange is fixed with bolts and support plates to ensure that the flange face is concentrically parallel to the vertical table before cutting.

When processing the small end flange, clamp the tool base plate on the vertical workbench, and tighten the small end flange and the small support plate with six manual small sockets after fastening the back of the small end flange and the small support plate. Solid, in order to process the small flange, the verticality of the large flange should be ensured when finding the cutting.

The tooling structure of the large flange is simple and reasonable, easy to manufacture, good in rigidity, easy to find and adjust and process, and fully meets the requirements for processing large elbow flanges on vertical lathes. The three sets of elbow flanges are all qualified. Under the conditions, a new way to process similar parts with a vertical lathe has been opened up.

Tooling stiffness check

The cantilever beam with trough structure is bent and twisted when it is turned. The deflection and rotation angle should be checked. After the above check, the maximum deflection is 7.27×Lo-7m, and the maximum rotation angle is 8.969×10-5.

Steel bars are added in the relevant parts, the stiffness is much higher than the calculated value, and the stiffness fully meets the requirements of the cutting force. The maximum turning diameter of the tool and the elbow flange is 2.42m≤3.50m (rotating diameter of the double-column vertical car), so this Tooling is theoretically possible.