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Forgeable piece forging shaping method

A technology of forging and forging, which is applied in the field of forging and forming technology, and can solve the problems of large amount of forging deformation and high impact energy

Inactive Publication Date: 2008-09-17
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the maximum tonnage of domestic large-scale forging equipment is usually about 18,000 tons, and the length of blades that can be processed is relatively short. Forgings with long overall length and relatively flat profile, such as steam turbines with a total length of 1300 mm Due to the long length and large amount of forging deformation, the large blades of the last stage require a large amount of striking energy. Generally, large-scale forging equipment with a capacity of more than 20,000 tons is required. Therefore, such large blade products are limited by forging processing equipment, and most of them are from abroad. import

Method used

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Embodiment Construction

[0014] Combine below figure 1 , figure 2 , image 3 Describe the process of the present invention:

[0015] Put the blade blank 4 into the cavity of the lower mold 3, and then forge it once to fill the larger part of the blade into shape, such as figure 2 Shown; after the first forging, it will be as figure 1 The iron sheet 1 shown covers the part of the blade 4 that does not fill the cavity. The thickness of the iron sheet is 3 mm to 5 mm. The four sides of the iron sheet 1 are chamfered. Heat it to 200 degrees Celsius to 250 degrees Celsius before use, such as image 3 As shown, then forging is performed once. During this forging process, the upper die 2 is in contact with the iron sheet 1, so that the part of the workpiece contacting with the iron sheet 1 is fully formed. After the second forging, the part of the blade profile pad iron sheet There is a slant transitional drop with other parts. The iron sheet 1 is removed for the third forging. This forging has not touched t...

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Abstract

The invention provides a forging forming method of forged pieces, which can forge the forged pieces with large total length and gradual molding surface without increasing the tonnage of the forging equipment. The method is characterized by comprising the following steps: putting blank in a die cavity and forging at one time; covering sheet iron which can cover the width of the blank at the upper part of the blank, and directly forging on the sheet iron; removing the sheet iron and forging again.

Description

(1) Technical field [0001] The invention relates to a forging forming process, in particular to a forging forming method for forgings. (2) Background technology [0002] At present, the maximum tonnage of large-scale forging equipment in China is usually about 18,000 tons. The blade length that can be processed is relatively short, and forgings with long overall length and relatively flat profile are forged, such as a steam turbine with a total length of 1300 mm. Due to the long length and large forging deformation of the final large blade, the energy required to strike is large. Generally, large forging equipment with a capacity of more than 20,000 tons is required. Therefore, such large blade products are limited by forging and processing equipment, and most of them are from abroad import. (3) Summary of the invention [0003] In view of the above-mentioned problems, the present invention provides a forging forming method for forgings, which can forge forgings with a longer ov...

Claims

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Application Information

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IPC IPC(8): B21K3/04
Inventor 王金吕李湘军
Owner WUXI TURBINE BLADE
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