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Method for eliminating bending deformation of rolling mill-type heavy part

A technology of bending and deformation of heavy parts, applied to the details of milling machine equipment, metal processing equipment, milling machine equipment, etc., can solve problems such as bending deformation, uneven force, and unqualified products, so as to improve service life, eliminate bending deformation, The effect of improving productivity

Active Publication Date: 2013-03-06
CHANGZHOU BAOLING HEAVY IND MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the bending deformation easily occurring near the middle part of the surface of the workpiece when processing the heavy parts of the rolling mill described in the background technology, which cannot meet the processing accuracy requirements, resulting in unqualified products, uneven thickness of the rolled steel plate, and Due to uneven force, it is easy to break and other problems, and a method for eliminating bending deformation of rolling mill heavy parts that can solve the aforementioned problems is provided

Method used

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  • Method for eliminating bending deformation of rolling mill-type heavy part
  • Method for eliminating bending deformation of rolling mill-type heavy part
  • Method for eliminating bending deformation of rolling mill-type heavy part

Examples

Experimental program
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Effect test

Embodiment 1

[0027] refer to Figure 1 to Figure 4 As shown, the method for eliminating bending deformation of heavy-duty rolling mill parts includes the following steps: Step 1, place the workpiece 1 flat on the workbench, and then process the side stand pad support when the workpiece 1 is laterally sideways on the side of the workpiece 1 Surface 4; step 2, place the workpiece 1 sideways on the workbench, place a side stand block 5 of the same height under the support surface 4 of the side stand block, and process the upper and lower sides of the workpiece 1 on the processing reference surface. Two measurement datum planes 8, and ensure that the flatness of the measurement datum planes 8 is less than 0.05mm, select a plurality of measurement datum points 9 on the measurement datum planes 8 at equal intervals P in the transverse direction, and the distance P should be selected according to the shape of the workpiece 1 In general, the spacing P is selected from 300mm to 500mm, and the flatn...

Embodiment 2

[0029] On the basis of Example 1, as a further optimization of the technical solution of the present invention, in step 1, when the workpiece 1 is placed flat on the workbench, it is necessary to first use the "three-point alignment method" to eliminate the distortion of the workpiece 1. "Three-point alignment method" is to set two reference pads and two auxiliary reference pads of the same height under the workpiece 1, and then use a jack as the third reference point to detect the two auxiliary pads by adjusting the height of the jack. For the height change of the position of the reference block, a shim is added to an auxiliary reference block with a large height change, so that when the height of the jack is adjusted, the height variation of the two auxiliary reference blocks is the same. By this method, the twisting deformation generated when the workpiece 1 is placed flat can be overcome, so that the bending deformation of the workpiece 1 can be more completely eliminated. ...

Embodiment 3

[0031] On the basis of Embodiment 1, as a further optimization of the technical solution of the present invention, in order to facilitate the elimination of the bending deformation of the workpiece 1, in step 2, when selecting the measuring reference point 9, it is necessary to ensure that the supporting surface 6 of the flat pad corresponds to A measurement reference point 9 is provided at a position on the measurement reference plane 8 .

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Abstract

The invention discloses a method for eliminating bending deformation of a rolling mill-type heavy part. Design idea of the invention is as below: when a workpiece is in an edge-on state, bending deformation caused by deadweight is little, so processing a flatwise cushion block holding surface and a measure reference surface under the state can gain high precision. A plurality of measure reference points are transversely arranged on a measure reference surface, and a flatness of each measure reference point position is measured and recorded. When a workpiece is disposed horizontally, bending deformation will be occurred near a middle part of the workpiece, due to deadweight effect; under this circumstance, only a height of a cushion block under the workpiece needs to be adjusted, so that the flatness of the workpiece at each measure reference point corresponds with the data recorded in the edge-on state of the workpiece, thereby eliminating bending deformation of the workpiece. The method for eliminating bending deformation of the rolling mill-type heavy part of the invention can eliminate bending deformation of the heavy part before processing and increase processing precision of the workpiece.

Description

technical field [0001] The invention relates to a treatment method before mechanical processing, in particular to a method for eliminating bending deformation of rolling mill heavy parts before processing. Background technique [0002] When processing heavy parts such as rolling mills, due to the influence of its own gravity, the middle part will bend downward, especially the archway, which is one of the most core large parts in metallurgical rolling equipment. Generally, a single piece of archway is about 150 tons. The length, width and height can reach about (9*4*0.7) meters. In the past, they relied on imports. In order to reduce the cost of equipment, they gradually realized localization. The difficulty of archway processing is not only the need for large-scale high-precision CNC There are also many techniques and methods in processing, and the elimination of bending deformation directly determines the quality of the product. The area of ​​the archway is relatively larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C3/00
Inventor 张永洁杨国廷徐剑
Owner CHANGZHOU BAOLING HEAVY IND MACHINERY
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