Combination roll manufacturing method with pre-embedded structure

Abstract

The invention discloses a method for manufacturing a combined roller with a pre-embedded structure. The combined roller includes a mandrel, a roller sleeve and a flat key. The roller sleeve is inserted into the mandrel and has an interference fit. The keyway, the flat key is set in the keyway, the mandrel and the roller sleeve can be positioned axially and circumferentially through the flat key, and transmit the torque. This method first manufactures the mandrel and the roller sleeve, the roller sleeve is inserted into the mandrel for assembly and positioning, and the installation position is pressed by the flat key. Process the keyway; install the flat key in the keyway, and fill the pre-drilled hole in the wall of the roller sleeve to the outer ring of the roller sleeve through surfacing welding; machine the outer ring of the roller sleeve until the final drawing size of the roller sleeve, and complete the manufacture of the combined roll. The combination roll and its manufacturing method overcome the defects of traditional small-diameter close-packed continuous casting rolls. The cost of the new product is low, and the follow-up repair is simple. It does not need to be disassembled. It only needs to be repaired directly as the whole roll, which effectively reduces costs and improves repair efficiency. .

Description

technical field [0001] The invention relates to a method for manufacturing a combined roll with a pre-embedded structure. Background technique [0002] Usually, the continuous casting rolls in the sector section of the continuous casting machine use the small roll diameter close-packed technology, which has a small roll diameter and low bearing capacity, and is prone to stress concentration on the shaft, which leads to cracks, or even breaks and scraps. There are mainly two mature technical solutions for continuous casting rolls with small roll diameter and close arrangement: one is to use integral rolls made of high-performance materials, and the price of new products is high, but the follow-up repair is relatively simple; For the combined roller of the sleeve, the new manufacturing price is low, but the follow-up repair process is complicated, and the combined structure of the combined roller needs to be disassembled before the mandrel and the roller sleeve can be repaired...

AI Technical Summary

Problems solved by technology

[0002] Usually, the continuous casting rolls in the sector of the continuous casting machine adopt the small roll diameter close-packed technology, the roll diameter is small, the bearing capacity is low, and the axial stress concentration is prone to cause cracks, or even break and be scrapped.

There are mainly two existing mature technical solutions for continuous casting rolls with small roll diameters closely arranged: one is to use high-performance material integral rolls, which are expensive to manufacture, but subsequent repairs are relatively simple; the other is to use common materials for mandrels and rolls Combination rollers with sleeves, the manufacturing price of new products is relatively low, but the follow-up repair process is complicated, and the combined structure of the combination rollers needs to be disassembled before the mandrel and roller sleeves can be repaired separately

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