Welded flange hot-rolling technique

A flange and process technology, applied in the field of flat welding flange hot coil process, can solve the problems of increased manufacturing cost and workload, unequal thickness of inner and outer diameters, increased operating procedures, etc., to overcome waste of raw materials and accurate geometric dimensions , to avoid the effect of breaking

Inactive Publication Date: 2009-05-06
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AI-Extracted Technical Summary

Problems solved by technology

Although this invention is rolled into a flat welded flange to a certain extent to achieve the advantages of labor saving, time saving and raw material saving, the steel plate used must be pre-selected with a suitable thickness and length, and the thickness and length must be reserved. There is a lot of room for waste of raw materials, which also increases manufacturing costs and workload, and the production process of this patent can only realize the production of one flange blank at a time, and the efficiency is low
The Chinese invention patent "A Method for Making Flange...
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Method used

(1) steel billet is heated in furnace first, and rolled into required strip hot-rolled flat steel plate 1a, rolling temperature is 1100~1150 ℃; Described steel billet is rolled into cross section and is isosceles trapezoid The strip-shaped hot-rolled flat steel 1a, that is, the widths of the two sides of the strip-shaped ...
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The invention relates to a technique of flat welding flange hot rolls, which comprises the procedures of: putting a steel billet into a furnace and heating, then according to the thickness and width of flange blank, immediately rolling the hot billet intoto strip hot-rolled flat plate of which the cross-section approximates an isosceles trapezoid; then arc curling the plate toward the narrow side and making into spiral multi-layer circular steel rings of which the ends are connected successively; next cutting the connected rings into independent rings along the bus; and then flattening the rings and welding docking ports at above 700 DEG C, and making into flange blank. The invention overcomes the disadvantages of the prior flange manufacturing technique such as waste of raw materials, relatively low precision of flange blank and low production efficiency, thereby realizing mass production of multiple circular curling, speeding up production, improving quality, and greatly improving production efficiency. Besides, the technique which is easy to be operated, popularized and implemented, solves the problem existing in head and tail straight segment, raises utilization rate of the raw materials, and has good social and economic benefit.

Application Domain

Metal rolling arrangements

Technology Topic

Straight segmentSheet steel +8


  • Welded flange hot-rolling technique
  • Welded flange hot-rolling technique
  • Welded flange hot-rolling technique


  • Experimental program(1)

Example Embodiment

[0030] Example 1: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5-1 , Figure 5-2 , The number 1a in the figure is the strip hot-rolled flat steel plate, 1b is the round steel ring after hot coiling, 2 is the generatrix cutting line of the spiral multi-layer round steel ring, 3 is a specific type of cylindrical mold, 4 is After cutting, 5 is the weld.
[0031] A flat welding flange hot coiling process, the process steps are:
[0032] (1) The steel billet is heated and rolled into the required strip hot-rolled flat steel plate 1a at a rolling temperature of 1100~1150℃; the billet is rolled into a strip with an isosceles trapezoid in cross section The hot-rolled flat steel 1a, that is, the strip-shaped hot-rolled flat steel has unequal widths on both sides. The use of hot-rolled flat steel with unequal widths on both sides can make the inner and outer thickness of the crimped round steel ring the same or approximately the same during the next process of crimping, thereby providing convenience for subsequent finishing and saving raw materials.
[0033] (2) The strip-shaped hot-rolled flat steel 1a is crimped in a circular arc along one side of the strip to form a spiral multi-layer round steel ring connected end to end in sequence. The crimping temperature is 820~960℃ (such as figure 1 with figure 2 Shown).
[0034] When the hot-rolled flat steel is crimped, a specific type of cylindrical mold 3 is used as the lining. The specific method is: an adjustable head clamp is fixed on the cylindrical mold 3, and the strip-shaped hot-rolled flat steel is inserted into the In the adjustable head clamp, keep the narrow side of the hot-rolled flat steel close to the surface of the cylindrical mold 3. When the hot-rolled flat steel does not rotate with the cylindrical mold 3, rotate the cylindrical mold 3 to make the flat steel head close It fits on the surface of the mold, thereby eliminating the straight section of the head of the hot-rolled flat steel 1a. Continue to rotate the cylindrical mold 3, keep the hot-rolled flat steel curled toward the mold surface along the narrow side, and move the cylindrical mold laterally (for example, by reducing the motor control displacement mechanism), avoiding the overlap of the multi-circular curled workpieces, thereby reducing Hot-rolled flat steel is made into spiral-shaped multi-layer equal-diameter round steel rings 1b (such as image 3 Shown).
[0035] When the workpiece is about to be rolled, the hydraulic top steel device is activated, and the outer circle of the workpiece is pressed through the pressing end, so that the tail of the workpiece is closely attached to the mold, and the straight section of the tail of the workpiece is eliminated. Since the head and tail of the strip hot-rolled flat steel are fully utilized, the waste of excess raw materials at both ends of the traditional flange blank is solved.


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Description & Claims & Application Information

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