CN102744251A

CN102744251A - Rolling mill for strips with special-shaped cross sections

Info

Publication number: CN102744251A
Application number: CN2011100986394A
Authority: CN
Inventors: 杨惟志; 余波
Original assignee: SHANGHAI GREENSAI HI-TECH MATERIALS Co Ltd
Current assignee: SHANGHAI GREENSAI HI-TECH MATERIALS Co Ltd
Priority date: 2011-04-20
Filing date: 2011-04-20
Publication date: 2012-10-24

Abstract

The invention relates to a rolling mill for producing strips with special-shaped cross sections. The rolling mill comprises a flat roll (1), strips (2) with special-shaped cross section, a roll supporting bearing (3), a thrust bearing (4), a bearing box (5), a contour roll (6), a roll ring supporting bearing (7), two roll rings (8), a retainer ring (9) and a rolling mill stand (10), one end of the flat roll (1) is connected with an external coupler so as to provide motive power; the contour roll (6) is supported by the bearing box (5) and can rotate freely without power input, and the two eudipleural roll rings (8) form a required hole pattern; and the roll rings (8) are supported by the roll ring supporting bearing (7) and can rotate freely relative to the contour roll (6). Compared with the prior art, the rolling mill has the advantages that the fluctuation of the rigidity difference at the junctions of thick and thin materials of the rolled strips is small, a more homogeneous material can be obtained, and cracking and peeling phenomena can be eliminated; and interannealing treatment is omitted, so that the rolling process can be carried out continuously, the productivity is improved, and the cost is lowered.

Description

A kind of milling train that is used for the odd-shaped cross section band

Technical field

The present invention relates to a kind of milling train that is used for the odd-shaped cross section band, be specifically related to a kind of milling train of semiconductor transistor power component that be used to produce with copper alloy odd-shaped cross section band.

Background technology

Be used for the semiconductor transistor power component and see Fig. 1 a and b with the cross section commonly used of copper alloy abnormity made-up belt, its cross section is made up of thick material and thin material, and adopting groove rolling is the common methods that the odd-shaped cross section band is produced; General two rollers that adopt of milling train, a roller is a plain-barreled roll, another roller is a forming roll; Two rollers are connected with the herringbone bear distributor box through shaft coupling respectively, obtain the opposite moment of torsion of rotating speed equidirectional, and band is in order to obtain required mechanical strength; It is rolling generally will to pass through multiple tracks, but because the roller at forming roll epithyrid place footpath is different, the thick material place of band and thin material place have a speed difference when rolling; Tend to cause the uneven phenomenon of hardness number of thick, thin material A place, boundary (seeing a figure of Fig. 1) in rolling; Difference reaches 25%, and thick material upper end, A place hardness number is higher, and this phenomenon can often cause following harm:

1. when down the road was rolling, this place was prone to crack, peeling, therefore must carry out the intermediate annealing processing when rolling descend, and this has not only increased cost, has also reduced productivity ratio.

2. because this locates the inhomogeneous and harder of hardness number, produce bigger unsettled side force when being prone to make strip-rolling, make band move left and right in pass cause banding pattern undesirable, produce dimensional discrepancy to band is scrapped.

3. there is speed difference in thick, thin material place during owing to strip-rolling, causes band and roll shop building to produce slippage and causes the strip surface scratch, influences surface quality.

Summary of the invention

The object of the invention is exactly a kind of being used for that provides for the deficiency that overcomes above-mentioned prior art existence

The milling train of odd-shaped cross section band.

The object of the invention can be realized through following technical scheme: this milling train comprises plain-barreled roll (1), odd-shaped cross section band (2), roll support bearing (3), thrust bearing (4), bearing housing (5), forming roll (6), collars spring bearing (7), collars (8), back-up ring (9), rolling-mill housing (10); One end of described flat roll (1) is connected with outside shaft coupling provides power; Described forming roll (6) supports unpowered input free to rotate by bearing housing (5); And form required pass by symmetrical two collars (8); Collars (8) is to be supported by collars spring bearing (7); And can freely rotate with respect to forming roll (6); When imposing identical working modulus at rolling thick, thin material place like this, forming roll (6) is close in the peripheral speed and the peripheral speed of collars (8) on thin material at thick material place, thereby the fluctuation of the difference of hardness at thick, the thin material of odd-shaped cross section band A place, boundary (seeing a figure of Fig. 1) is reduced; Obtain the comparatively material of homogeneous, in order to the following process of band.

Compared with prior art, have the unpowered driving of roll of pass, the collars of forming pass is free to rotate with respect to roll, and when with thick material of the rolling special-shaped cross section of identical working modulus band and thin material, the peripheral speed at thick, thin material place is close.

Have the following advantages

1. the fluctuation of the difference of hardness of thick after the strip-rolling, thin material intersection reduces, and obtains the comparatively material of homogeneous, has eliminated crackle and skin effect phenomenon.

2. reduce intermediate annealing and handle, the operation of rolling can be carried out continuously, improved productivity ratio, reduced cost.

3. the centering performance when making strip-rolling is better, and template is good, and yield rate improves.

4. improved the surface quality of band.

Description of drawings

Fig. 1 is the sectional view of irregular belt material commonly used.

Fig. 2 is a duo mill sectional drawing of the present invention.

The specific embodiment

Below be the embodiment that combines accompanying drawing to do, in order to further explanation the present invention according to technical scheme of the present invention.

As shown in Figure 2; The forming roll (6) that has grooved is motorless driven roll; Forming roll (6) and collars (8) form required pass; Collars (8) is to be supported by the collars spring bearing (7) that is installed on the forming roll (6), so collars (8) is free to rotate with respect to forming roll (6), and plain-barreled roll (1) is a driven roller; Pass through in roll gap that odd-shaped cross section band (2) is made up of plain-barreled roll (1) and forming roll (6) and collars (8) and the pass; Because of forming roll (6) is that driven roll and collars (8) are free to rotate with respect to forming roll (6), so the mill speed of the intersection of thick material portion and thin material portion and thick, thin material is approaching during the profiled-cross-section strip-rolling when rolling, and the section after rolling obviously reduces through the fluctuation of the difference of hardness at thick, the thin material of actual measurement proof A place, boundary (a that sees Fig. 1 schemes); Obtain the comparatively material of homogeneous, eliminated crackle and skin effect phenomenon.

Claims

1. milling train that is used for the odd-shaped cross section band; It is characterized in that; This milling train comprises plain-barreled roll (1), odd-shaped cross section band (2), roll support bearing (3), thrust bearing (4), bearing housing (5), forming roll (6), collars spring bearing (7), collars (8), back-up ring (9), rolling-mill housing (10); One end of described flat roll (1) is connected with outside shaft coupling provides power; Described forming roll (6) supports unpowered input free to rotate by bearing housing (5), and forms required pass by symmetrical two collars (8).

2. according to claim 1 described a kind of odd-shaped cross section band and strip rolling mill that is used for, it is characterized in that collars (8) is to be supported by collars spring bearing (7), and can freely rotate with respect to forming roll (6).