CN102553910A

CN102553910A - Method for rolling mill to roll round steel with diameter phi of 120mm and round steel with diameter phi of 130mm by one roller set

Info

Publication number: CN102553910A
Application number: CN2011103371777A
Authority: CN
Inventors: 姚文峰; 李颖; 叶文学; 黄昌义; 石奇良
Original assignee: Shanxi Taigang Stainless Steel Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2011-10-31
Filing date: 2011-10-31
Publication date: 2012-07-11
Anticipated expiration: 2031-10-31
Also published as: CN102553910B

Abstract

A method for a rolling mill to roll round steel with the diameter phi of 120mm and round steel with the diameter phi of 130mm by one roller set includes the ten-pass design of a 650mm rolling mill and a regulating method thereof. The two types of round steel share the first, second, third, fourth and fifth passes and the eighth pass of leader passes. When in rolling of the round steel with the diameter phi of 120mm, the roller gap of the upper rolling line is 6mm, feeding is carried out after 90-degree rotation from the seventh pass to the eighth pass. When in rolling of the round steel with the diameter phi of 130mm, the roller gap of the upper rolling line is regulated to be 11mm, feeding is carried out from the fifth pass to the eighth pass after the sixth pass and the seventh pass are cast off, the third pass and the fifth pass meet the requirement for the entry width of the previous pass in the processes of rolling the round steel with the diameter phi of 120mm and the round steel with the diameter phi of 130mm simultaneously, the eighth pass meets requirements of the round steel with the diameter phi of 120mm and the round steel with the diameter phi of 130mm simultaneously, the width B of the eighth pass meets requirements of the round steel with the diameter phi of 130mm, and the height H thereof meets requirements of the round steel with the diameter phi of 120mm. By the method, the rolling mill can roll the round steel in two specifications by the same roller set, and roller changing frequency and time due to alternating of the two specifications can be reduced.

Description

The method of shared cover rolling Φ 120mm of roll of one rolling mill and Φ 130mm round steel

Technical field

This patent belongs in the Rolling Production field of round steel bar, and on a 650mm three-high mill, a shared cover roll and pass are realized Φ 120mm and the rolling a kind of method of two size round steel of Φ 130mm.

Background technology

Usually the round steel bar more than rolling Φ 100mm on the medium section mill needs the milling train more than two or two at least, and wherein finished product hole and leader pass will respectively use 1 rolling mill.A rolling specification needs a cover roll, and is more like the specification of fruit product, needs supporting a lot of roll and spare part deposit; Take a large amount of funds and place; Can increase down the roll change number of times and the roll changing time of specification simultaneously, increase operator's labour intensity, reduce production efficiency.

Summary of the invention

The present invention provides the method that rolls out Φ 120mm and two kinds of round steel specifications of Φ 130mm with a rolling mill and a cover roll.Reduce the quantity of using roll thereby reach, reduce the turning amount and the storage level of roll, reduce the roll change number of times and the roll changing time of specification, alleviate operator's labour intensity, enhance productivity.

The present invention includes 10 PASS DESIGN of 650mm milling train and method of adjustment thereof, it is characterized in that: the pass that pass is designed to Φ 120mm round steel is a benchmark, and two kinds of shared passes of round steel are the 8th hole of 5 holes, the 1st hole to the and leader pass; Last roll line roll gap during rolling Φ 120mm round steel is 6mm, is turned over to the elliptical aperture in 8 holes by the edging pass for rolling in 7 holes and turn 90 degrees feed, and the percentage elongation in 8 holes is 1.25; During rolling Φ 130mm round steel; The roll gap of last roll line is adjusted to 11mm by 6mm; That is: 156mm, 152mm and the 116mm of the pass height in the 2nd, 4 and 8 holes of going up roll line during respectively by rolling Φ 120 is adjusted into 161mm, 157mm and 121mm; Get rid of the 6th to 7 hole, by the box-shaped hole in 5 holes elliptical aperture feed to 8 holes so that when adapting to rolling Φ 130 to the dimensional requirement of supplied materials.The percentage elongation in 8 holes is 1.45; 3rd, 5 holes be designed to take into account rolling Φ 120mm and Φ 130mm round steel the time to the requirement of previous pass supplied materials width; That is: the bottom land width in the 3rd, 5 holes is distinguished 156mm and 150mm, the requirement of the 2nd hole supplied materials 156mm and 161mm, 4 hole supplied materials 152mm and 157mm in the time of can satisfying rolling Φ 120mm and Φ 130mm round steel simultaneously; The pass size in the 8th hole is taken into account Φ 120mm and two kinds of round steel specifications of Φ 130mm demand to its size simultaneously, and its width B is considered by the requirement of Φ 130mm specification; Its height H is considered by the requirement of Φ 120mm specification.That is: according to the finished diameter of empirical equation Bk=1.2 ~ 1.4 times, get Bk=180mm; The finished diameter of H=0.85 ~ 0.95 times is got H=116mm; The last groove of Φ 120mm and Φ 130mm round steel is not shared, and the width of rebate of Φ 120mm finished product circular hole is 126mm, and height is 123mm, and the width of rebate of Φ 130mm finished product circular hole is 136mm, and height is 133mm.

The disadvantage that roll quantity turning amounts many, roll are big and storage level is many that causes with two cover rolling two specifications of roll before the present invention can avoid; And reduced mutual and roll change number of times and roll changing time that cause by two specifications; Alleviate operator's labour intensity, improved production efficiency.

Description of drawings

Fig. 1 is a pass allocation plan of the present invention.

Among the figure, 1---1 hole pass, 2---3 hole passes, 3----5 hole passes, 4---7 hole passes, 5---130mm finished product hole pass, 6---120mm finished product hole pass, 7---2 hole passes, 8---4 hole passes, 9---6 hole passes, 10---8 hole passes.

The practical implementation method

The rolling condition of present embodiment is: use the square billet of 220mm * 220mm, with a 650mm three-high mill, turn over steel plate before the machine, feed steel from following roll line; Lifting platform is arranged behind the machine, feed steel from last roll line.

Because on a cover roll, will arrange more pass, preceding 6 passages must be used conjugate pass.

The rolling pass of Φ 120mm and Φ 130mm round steel is respectively 9 passages and 7 passages.When rolling, the 1st to the 5th hole, the 8th hole shared (shown in Figure 1).

10 pass dimensional configurations shown in the table 1 after on the roll, are processed turning, and make the corresponding guide and guards of importing and exporting, make and turn over steel plate and other production preparation.

Table 1 pass size

。

During rolling Φ 120mm round steel, use the pass in the 1st to 8 hole and the last groove of Φ 120mm, totally 9 rolling passes.The roll gap of following roll line keeps 8mm, and the roll gap of last roll line is adjusted to 6mm, and the pass height that makes 8 holes is 116mm; The width of the pass in the 8th hole is 180mm; According to the size situation of finished product, again the pass height size in 8 holes is finely tuned then, with the required precision of the size that reaches finished product.Concrete material molded dimension is seen table 2 with the adjustment parameter.

Material molded dimension during the rolling Φ 120mm of table 2 round steel and adjustment parameter

。

The roll gap of last roll line is set to 6mm, (turns over steel 90 by the elliptical aperture feed of 7 hole edging pass for rolling to 8 holes ⁰), the percentage elongation in 8 holes is about 1.25; The roll gap of following roll line is 6mm.

During rolling Φ 130mm round steel, the last groove that uses the 1st to 5 hole, the 8th hole and Φ 130mm is totally 7 rolling passes, gets rid of the 6th to 7 hole.The roll gap of following roll line keeps 8mm, and the roll gap of last roll line is adjusted to 11mm, and the pass height in 8 holes is 121mm; The width of the pass in the 8th hole is 180mm; According to the size of finished product, the pass height size in 8 holes is finely tuned, with the required precision of the size that reaches finished product.Concrete material molded dimension is seen table 3 with the adjustment parameter.

Material molded dimension during the rolling Φ 130mm of table 3 round steel and adjustment parameter

。

The roll gap of last roll line is set to 11mm, and by the box hole in the 5 holes elliptical aperture feed (not turning over steel) to 8 holes, the percentage elongation in 8 holes is about 1.45, and the roll gap of following roll line is 11mm.

Claims

1. the method for shared cover rolling Φ 120mm of roll of a rolling mill and Φ 130mm round steel comprises 10 PASS DESIGN of 650mm milling train and method of adjustment thereof, and it is characterized in that: two kinds of shared passes of round steel are the 8th hole of 5 holes, the 1st hole to the and leader pass; Last roll line roll gap during rolling Φ 120mm round steel is 6mm, and the pass height in the 2nd, 4 and 8 holes of last roll line is respectively 156mm, 152mm and 116mm, is turned over to the elliptical aperture in 8 holes by the edging pass for rolling in 7 holes and turn 90 degrees feed, and the percentage elongation in 8 holes is 1.25; During rolling Φ 130mm round steel, the roll gap of last roll line is 11mm, and the pass height in the 2nd, 4 and 8 holes of last roll line is respectively 161mm, 157mm and 121mm, gets rid of the 6th to 7 hole, and by the box-shaped hole in the 5 holes elliptical aperture feed to 8 holes, the percentage elongation in 8 holes is 1.45; The bottom land width in the 3rd hole is 156mm, and the bottom land width in the 5th hole is 150mm; The width of the pass in the 8th hole is 180mm, and the height of the 8th hole pass is 116mm; The width of rebate of Φ 120mm finished product circular hole is 126mm, and height is 123mm, and the width of rebate of Φ 130mm finished product circular hole is 136mm, and height is 133mm.