SU1570819A1 - Mill for two-row forming to shape - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the production of varietal profiles on continuous section bending mills. The purpose of the invention is to improve the quality of profiles with a two-hole profiling of a billet of hot rolled steel with a thickness of 2-4 mm. The two-sided profiling mill contains two pre-processing two-caliber and two single-caliber finishing stands with forming rolls. One of the forming elements of the upper roll of each preparatory stand, located on opposite sides of the longitudinal axis of the mill, and the upper rolls of the finishing stands are made with the possibility of axial displacement. The offset in any stand is Δ = 08B / (Α: 30) ³ , where B and α are, respectively, the length of the side of the forming element in cross section, mm and its angle of inclination to the roll axis, degrees. Increased productivity is achieved by speeding up the transshipment. 2 Il.

Description

The invention relates to the processing of metals by pressure and can be used in the production of varietal profiles on continuous section bending mills,

The aim of the invention is to improve the quality of the profiles by improving their geometry.

Figure 1 shows the proposed double-profile mill; Fig. 2 shows a possible embodiment of the upper two-gauge roll with limited axial movement of one of its forming elements.

The mill contains a setting stand 1 with smooth rollers, disc shears

2 for longitudinal dissolution of the workpiece in half (width), draft 3 and pre-finishing 4 two-caliber stands and two finishing single-caliber stands 5, In the cages x 4, the upper rolls each have a forming element on different threads) with limited axial displacement. The forming elements of the upper rolls of the finishing stands are also made with a limited displacement.

The upper two-caliber roll of the pre-finishing stand contains a shaft 6, on which two forming elements are placed on keys (not shown). Element 7 is fixed tightly (without axial displacement), and element 8 is fixed

SP J

About 00

with

limited axial displacement. A remote clamping ring 9 rests on the shaft flange 10 and is fixed to the shaft with a locking screw 11. The locking ring 12 is mounted on the shaft with a locking screw 13 so as to provide the shaft element 8 with axial movement within the value of D, which is determined by the dependence

U: 30) 3

where b and оС are respectively the length of the side part of the forming element in cross section and its angle of inclination to the roll axis.

The roll element is secured against axial displacement by the spacer ring 14, pressed against the element 8 by means of the nut 15.

The width of the forming elements 8 and 9 is equal to bv

An example, a two-sided profiling mill has a driving stand, circular shears, three roughing stands, two pre-finishing two-gauge: stands and two single-gauge finishing stands. One of the forming elements of the upper roll of each cutting stand (on different threads) has the possibility of limited axial displacement. The forming elements of the upper rolls of both finishing stands are also made with a limited axial displacement,

The length of the lateral part of the forming elements in cross section is L 100 mm, the angles of inclination o (, these parts to the axis of the rolls in pre-finishing cells x 80 and 85, in the finishing stand - 90 °.

five

0

The magnitude of the displacement elements:. oЈ & 0.8L / (p6: 30) 0.8. 1 00 / (80:: 30) 4.2 mm;

5 oL 85 °: L 0.8.1007 (85:30) 3.5 mm;

about 90 °: 0.8-1007 (90:30) 3.0 mm.

The use of the invention provides a reduction in the consumption of rolls (due to a decrease in their wear), an increase in productivity (from a reduction in trans-shipment) and a reduction in waste.

Claims (1)

Invention Formula A two-sided profiling mill containing two pre-cutting two-caliber stands and two one-caliber finishing stands with upper rollers, the elements of which are made with the possibility of relative axial displacement, characterized in that, in order to improve the quality of the profiles, in each pre-finishing stand one of 5 forming elements of the upper roll made with the possibility of axial displacement and these elements are located on opposite sides of the longitudinal axis of the mill, and the amount of displacement of the forming elements of the upper rolls in each stand is determined from the ratio And - ° A8b l) where D is the magnitude of the displacement forming elements of the upper rolls, mm; L is the length of the side of the forming element in cross section, mm;   The angle of the side of the element in the cross section, hail. FIG. one 10 11 Editor A.Lehnina Compiled by L.Samokhvalova Tehred M. Khodanich Proofreader S. Cherni Order 1474 Circulation 610 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 14-6 7 / s Phage. 2 Subscription