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Forged piece size control method based on stand deformation

A size control and forging technology, which is applied in the field of heavy-duty free forging hydraulic presses, can solve the problems of high processing cost, large processing allowance, and long cycle, and achieve the effects of reducing production costs, eliminating measurement errors, and reducing machining allowances

Inactive Publication Date: 2015-04-29
CHINA FIRST HEAVY IND +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The dimensional accuracy of the forging (7) produced by this control method can reach up to ±3mm, and the subsequent processing allowance of the forging is large, the processing cost is high, and the cycle is long

Method used

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  • Forged piece size control method based on stand deformation
  • Forged piece size control method based on stand deformation

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Embodiment Construction

[0023] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described: as Figure 1-2 As shown, a forging size control method based on frame deformation includes the following steps:

[0024] A. Establish the relationship between the deformation of the whole press and the pressure load

[0025] Let the elastic deformation of the lower beam 8 of the press be f 1 , the elongation of column 6 is f 2 , the elastic deformation of the upper beam 3 is f 3 , the deformation of the whole press is:

[0026] Σf = KP (1)

[0027] In the formula: K is the characteristic coefficient after the design of the press is completed, which is determined by the size of the drawing;

[0028] P is the hydraulic system pressure;

[0029] B. Calculate the final height dimension of the forging 7

[0030] The calculation formula of final height dimension of forging 7 is

[0031] h 3 =H 1 -H 2 -Σf (2)

[0032] In the formula, H 1 is the headroom ...

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Abstract

The invention discloses a forged piece size control method based on stand deformation. The method comprises the following steps: building the relationship between overall press deformation and a pressure load; calculating the final height size of a forged piece. During working of a free forging hydraulic press, a stand is deformed in the vertical direction due to the deformation resistance of the forged piece. The deformation comprises the elastic deformation f1 of a lower transverse beam, the elongation f2 of vertical columns, and the elastic deformation f3 of an upper transverse beam, and f1, f2 and f3 can all lead to the increase of the free height H1 of the press, which is the most important reason of poor size accuracy of the forged piece. Through an operation formula with the deformation value of the stand during working, measuring errors caused by deformation of a press body during working are completely eliminated, the size accuracy of the forged piece is increased from + / -3 millimeters to + / -1 millimeter, the size control accuracy of the forged piece is increased greatly during free forging, the machining balance is lowered, the production efficiency is increased, and the manufacturing cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of heavy free forging hydraulic presses, in particular to the control of the dimensional accuracy of forgings by the heavy free forging hydraulic presses, in particular to a method for controlling the size of forgings based on frame deformation. Background technique [0002] like figure 1 As shown, the current free forging hydraulic press is composed of the following parts: upper beam 3, column 6, and lower beam 8, which are tightened by tension bolts 2 to form a closed force-bearing frame, and the working cylinder 1 is installed in the upper beam 3. It drives the movable crossbeam 5 to move up and down; the displacement sensor 4 fixed on the side of the upper crossbeam 3 can detect the position of the movable crossbeam 5 from time to time through the magnetic ring moving together with the movable crossbeam 5 . Clearance height H of the press 1 is a fixed value, the moving distance H of the movable beam 5 ...

Claims

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Application Information

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IPC IPC(8): B21J9/20
Inventor 郝铁文殷文齐宋清玉王小红胡英
Owner CHINA FIRST HEAVY IND
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