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Method for forging large bevel tee

An oblique tee, large-scale technology, applied in the field of forging technology, can solve the problems of increased processing difficulty, difficult to control precision, and eccentric hole drilling errors, etc., to achieve the effects of easy processing, improved quality, and guaranteed processing quality

Active Publication Date: 2008-07-09
SHANGHAI BOILER WORKS
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  • Abstract
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Problems solved by technology

[0002] The large oblique tee is an important forging in the outer pipe of the boiler, such as figure 1 As shown, the forging is purchased from abroad at present, and the forging of the foreign forging is to first forge the forging into a huge rectangle 3, and the height of the rectangle 3 is the total height h of the inclined pipe 1 and the main pipe 2, Then it is processed by machining. In this way, the workload of the whole machining is quite large, especially the inner hole of the tee pipe fitting 2, because it is an eccentric hole, the size is large, and the height of the inner hole is greater than or equal to 1 meter. The problem of eccentric holes leads to errors in drilling eccentric holes, the accuracy is difficult to control, and the processing difficulty increases

Method used

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Embodiment

[0015] Such as figure 2 Shown, is the schematic diagram of forging method of large-scale oblique tee of the present invention, the forging method of large-scale oblique tee of the present invention is:

[0016] Step 1. Select a rectangular forging blank 4, the height H of the rectangle is twice the height from the farthest end of the inclined pipe 1 to the centerline of the inner hole of the main pipe 2, so that the inner hole of the main pipe 2 becomes the center of the rectangular forging 4 Hole, leaving machining allowance;

[0017] Step 2. Machining the central hole of the rectangular forging blank 4, which becomes the inner hole of the main pipe part 2;

[0018] Step 3. Saw off the remaining pieces of the process on one side of the main pipe part 2 with a band sawing machine;

[0019] Step 4. Process the inclined pipe fitting 1 again.

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Abstract

A forging method for manufacturing a large bevel arm three-way features that the finish allowance of a forged cubic block is increased. It includes such steps as choosing a forged cubic block to make its height is equal to the two times of the central line's height of main tube, machining a central hole of said cubic block to obtain the central hole of main tube, sawing to remove excessive material, ad machining oblique tube.

Description

technical field [0001] The invention relates to a forging method of a large inclined tee, in particular to a forging method for punching out the inner hole of a main pipe of a large inclined tee, and belongs to the technical field of forging technology. Background technique [0002] The large oblique tee is an important forging in the outer pipe of the boiler, such as figure 1 As shown, the forging is purchased from abroad at present, and the forging of the foreign forging is to first forge the forging into a huge rectangle 3, and the height of the rectangle 3 is the total height h of the inclined pipe 1 and the main pipe 2, Then it is processed by machining. In this way, the workload of the whole machining is quite large, especially the inner hole of the tee pipe fitting 2, because it is an eccentric hole, the size is large, and the height of the inner hole is greater than or equal to 1 meter. The problem of eccentric holes leads to errors in drilling eccentric holes, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/06B21J5/10
Inventor 应德华丁伟大
Owner SHANGHAI BOILER WORKS
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