Method for repairing plate of hot strip rolling mill online

A rolling mill archway and steel rolling mill technology, applied in the field of steel rolling machinery, can solve problems such as inability to adapt to fast-paced production and inability to solve, and achieve the effects of shortening the archway repair time, facilitating processing and manufacturing, and achieving quick results.

Inactive Publication Date: 2015-07-08
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actual situation of fast-paced production does not allow any archway to leave work and go offline, so this repair technology cannot meet the needs of fast-paced production at present
Technologists cannot solve the above problems through various meth

Method used

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  • Method for repairing plate of hot strip rolling mill online
  • Method for repairing plate of hot strip rolling mill online
  • Method for repairing plate of hot strip rolling mill online

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] Embodiment 1 Rolling mill arch repair method of the present invention

[0135] In this embodiment, step 1, step 2, step 3, step 4 and step 5 of the method for repairing the archway of the rolling mill are as described above, and will not be repeated here, and now for the determination in step 3 The frame line method is described in detail.

[0136] Frame dash:

[0137] Such as figure 2 As shown, a rectangular frame line is drawn on the surface of the upper archway. The four corners of the rectangular frame line are a1, a2, a3, and a4 respectively, and a1, a2, a3, and a4 occupy the four corners of the upper archway surface to be repaired in turn. , b1, b2, b3, and b4 occupy the midpoint of the a1a2 connection, a2a3 connection, a3a4 connection, and a4a1 connection in turn, a1 and a3 are connected with a dashed line, a2 and a4 are connected with a dashed line, b1, b2, b3, b4 Any two are connected with a scribe line, and all the drawn lines form the upper half of the fr...

Embodiment 2

[0138] Embodiment 2 Rolling mill arch repair method of the present invention

[0139] Only the frame scribing method is different from Example 1, and the others are the same as Example 1.

[0140] Frame dash:

[0141] Draw a rectangular frame line on the surface of the upper archway. The four corners of the rectangular frame line occupy the four corners of the upper archway surface to be repaired in turn, and then divide the rectangular frame line into 16 small rectangles. All the lines drawn Forming the upper half of the frame line; forming the lower half of the frame line in the same manner as forming the upper half of the frame line.

[0142] The repaired rolling mill archway in embodiment 1 and embodiment 2 was put into use again. Under the condition of the same amount of wear, the service life of the rolling mill archway in embodiment 2 was only 80% of the service life of the rolling mill archway in embodiment 1.

[0143] Analysis shows that compared with the prior art,...

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Abstract

The invention provides a method for repairing a plate of a hot strip rolling mill online. The method comprises the steps of 1, dismounting and removing; 2, detecting abrasion loss according to a fixed reference; 3, repairing the damaged plate surface; 4, repairing failed bolt holes in the plate surface online through a positioning die plate and a drilling machine; 5, mounting an upper sliding plate and a lower sliding plate, and finally detecting the size. The method has the advantages that the dimensional tolerance and the geometric tolerance of the plate surface and the bolt hole can be ensured by the online repair technology method; the combining strength and stability of a welding machine and the plate can be improved; the efficiency is increased by online repairing, and the repairing time can be also reduced.

Description

technical field [0001] The invention belongs to the technical field of steel rolling machinery, and in particular, the invention particularly relates to a method for on-line repairing the arch of a hot-rolled strip mill. Background technique [0002] In metallurgical enterprises, after long-term load operation of the hot-rolled strip mill archway and the compound attack of rolling cooling water and iron oxide scale, the contact surface of the mill archway is severely corroded and worn, the sliding plate fixing screw hole fails, and the window is difficult to control, which affects the rolling performance. Steady travel and product quality. Conventional manual welding, interpolation grinding and reaming and tapping are difficult to guarantee the repair quality, and the effect is not good. With the widening and expansion of rolled products, the adjustment of rolling process and the high requirements of product quality and output, the problems exposed by the rolling mill archw...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 李亘庞芳芳王长建陈传盛刘继梅梁军许倩谢晶
Owner SHANDONG IRON & STEEL CO LTD
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