CN1017122B - Roll mill for rolling light steel keel - Google Patents

Abstract

The present invention relates to a machine set for rolling light steel keels. The present invention has important improvement based on the prior art, has the procedures of cutting first and rolling then, and uses one motor for centralized transmission. A cutting device is a new design, and uses a pair of cutter rollers which are corresponding up and down; each cutter roller is provided with a rectangular cutter provided with four edges; each cutter forms a small alpha angle with a cutter shaft, and the cutter shaft forms a (90 DEG-alpha) angle with the longitudinal direction; other parts of the machine set are also correspondingly changed. The improved machine set has advantages of compact structure, convenient control, and manufacture and maintenance cost reduction, and is superior to the existing congeneric technology at home and abroad.

Description

Roll mill for rolling light steel keel

A kind of unit that is used for rolling lightgage steel joist, the present invention has made important improvement to prior art.

The lightgage steel joist unit is widely used in the processing and forming of sheet metal and other metals, can rolling various lightgage steel joists for building, as shaped steel such as body of wall keel, ceiling joist, stringer, light steel roof truss, door and windows, but the characteristics of this equipment are continuous automatic production material use coefficient height.

China has many families to produce the producers of lightgage steel joist units at present, the lightgage steel joist unit of also have from the Germany, states such as Japan, Italy buying, and these units all adopt the mode of earlier rolling back cut-out on procedure; Cut-out equipment (knife rest) will be synchronized with the movement with product, finishes reciprocating motion by Hydrauservo System, the discrete transmission that this causes rolling part and cut-off parts, make complex structure, huge, involve great expense, power consumption is big; Its cutter will have the cutting edge with the same shape of product, changes the essential replacing of product cutter, and the blade shape complexity, the difficulty of processing height, the expense height is changed and is adjusted cutting-tool engineering and requires height, and the cycle is long, the operating cost height, for the product of some section complexity, this cutter can't be realized.

Shortcoming at above prior art, the objective of the invention is to design a kind of rolling lightgage steel joist unit in back that cuts off earlier, concentrate with a cover electricapparatus transmission, do not need hydraulic system, cut-off parts is newly designed, other parts are also done some corresponding improvement, make whole unit arrangement rationally, compact, cost is low, and machining accuracy and production efficiency are not less than external introduction unit.

The present invention is grown, is cut off, sends to and roll forming by uncoiling, driving, guiding, survey; Full unit electricapparatus central driving as flattening, cut-out, traction and rolling power, is transferred to shearing device with electromagnetic clutch with main shaft power with a motor; Shearing device is relative up and down a pair of rotor, a rectangle cutter is housed on each rotor, every have four work edges to cutter, blade is a straight line, and blade becomes a small α angle with the axis of rotor, like this, in cutting-off process, blade is not to cut from the whole width of steel band, but along the process that steel band is laterally sheared gradually, makes the moment of torsion of roll shaft transmission less; Because of cutter becomes the α angle with rotor, it is oblique will causing otch, for this reason, again the longitudinal direction with cutter shaft and unit be adjusted to (90 °～α) angle, to guarantee the vertical vertical of otch and steel band; The cutter of installing on two rotors keeps a wrong cutter amount b in vertical direction up and down, and two cutters keep a wrong cutter amount a in side direction up and down; For making after steel plate cuts off, can draw back a segment distance with steel plate afterwards, carry-over pinch rolls are big than the nip rolls diameter, have a freewheel clutch in the gear-box; Lateral guide is made of side steering roll and side steering roll groove, and guide roller can freely rotate around axle, and steel plate passes through in the guide roller groove, has both limited its up-down vibration and has also limited its horizontal looseness.

Below in conjunction with Figure of description the present invention is further described:

Fig. 1,2 is the structural representation of this unit (master looks-overlooks)

Fig. 3 is the relative position of two rotors and the wrong cutter amount schematic diagram between two cutters

Fig. 4,5 is guider schematic diagram (master looks-analyses and observe)

Numbering representative among the figure:

1. uncoiler

2. uncoiler breathing mechanism

3. support

4. introducing port roller (guide) apron

4.1 last lower guide roll

5,8,10,12 lateral guides

5.1 side steering roll

5.2 side steering roll groove

6. measuring motion

7. flattening device

7.1 nip rolls

9. shearing device

9.1 last rotor

9.2 following rotor

9.3 cutter

9.4 voussoir

11. draw-gear

11.1 traction rollers

13. milling train

14. guiding clamping plate

15. motor

16.18,27,32 shaft couplings

17. reductor

19.29 gear-box

20,21,22,23,24,25 bevel gears

26. main shaft

28. roller mill main axle

30. the support of bearing

31. electromagnetic clutch

33. universal coupling

34. brake coupling

(1) transmission mechanism (Fig. 1,2)

The power of motor 15 passes on the main shaft 26 by shaft coupling 16 reductors 17 shaft couplings 18; Pass on the main shaft 28 of milling train 13 by shaft coupling 27 again; The power of main shaft 26 passes through bevel gear 20,21, gear-box 19, and universal joint 33 passes to nip rolls 7.1; The power of main shaft 26 passes through bevel gear 22,23 again, bearing bracket stand 30, and electromagnetic clutch 31 passes on the tool roller axis; The power of main shaft 26 passes through bevel gear 24,25 again, gear-box 29, and universal joint 33 passes to traction rollers 11.1.

(2) shearing device (Fig. 1-3)

Be relative up and down a pair of rotor 9.1,9.2, α at angle between cutter 9.3 and the rotor axis, cutter 9.3 usefulness voussoirs 9.4 compress, and rotor axle center and unit longitudinal direction are formed slopely 90 °～α angle along the rightabout with cutter and tool roller axis formation oblique angle, to guarantee that otch is vertical; In order effectively to cut off steel band, two cutters 9.3 up and down that are installed on rotor and the following rotor have a wrong cutter amount b on short transverse, and the b value is 0.2～0.6mm, and two cutter side direction need retention gap a, and a value is 0.03～0.8mm.

(3) lateral guide (Fig. 4,5) 5,8,10,12, side steering roll 5.1(can make axle freely rotate) be contained in the guide roller groove 5.2, workpiece (steel plate) passes through in the guide roller groove, has both limited its up-down vibration and has also limited its horizontal looseness, and side steering roll rolls with steel plate limit portion and contacts.

(4) the identical slightly larger in diameter of the diameter of carry-over pinch rolls 11.1 than nip rolls 7.1 with the roll working diameter, will be between during this period of time behind the steel strip cutting and before entering carry-over pinch rolls with the speed motion slightly slow than mill speed, its purpose is to make steel band to enter to draw back a segment distance with last joint product before rolling and is about 50～100mm, can avoid overlapping, for guaranteeing above requirement, do not make steel band again after entering roller 11.1, in of the relative slip of generation steel band in roller 7.1 places with roller 7.1, between the input of gear-box 19 and output shaft, freewheel clutch is housed, the rotating speed that is roller 7.1 can surmount the rotating speed of gear 21, and has only a pair of 1: 1 gear drive in the gear-box 29.

(5) 6 is measuring motion, and 6.1 is snub pulley, (dead axle) free to rotate, 6.2 for being equipped with the photoelectric encoder of axle head rubber roll, and its axis can be pressed on the steel band by deadweight around other axis swing.

(6) 4 is the introducing port roller (guide) apron, and steel band moves between last lower guide roll 4.1, can not produce measuring roller and scratch.

(7) guiding clamping plate 14 are housed on the milling train 13, open its porch, and the exit is narrow and small, and it guarantees that steel band enters down roll reliably one.

Advantage of the present invention and effect

1. the change of this unit is rolled earlier rear cutting process into cutting earlier rear roll process, and cutter for same is simple, as long as cutter is not less than the width of various steel bands, then changes product, does not need the tool changing tool, and the cutting edge of cutter is simple, makes easily, and cheap, the life-span is long.

2. this unit is taked central driving, is convenient to control, cost is low, saves Hydraulic Power Transmission System, and the kind of drive is simple and reliable.

3. changing reciprocal cut-out equipment is unidirectional whirligig, and equipment is simplified significantly, and energy resource consumption reduces, and power consumption descends 85%.

The lightgage steel joist roll mill Groups List of rolling unit of lightgage steel joist of the present invention and Germany import is compared as follows table: (seeing Table)

Groups List is compared as follows:

Project West Germany of the present invention import unit

40 meters/minute of production capacity (max) 40 meters/minute (max)

Rolling and cut off power 15KW 48.5KW

One pair of heavy 0.34Kg 34Kg of cutter

Condition is not wanted hydraulic system will hydraulic system, and leakage of oil is serious

Fault rate is high by microsystem reliably working fault rate

The consumable accessory cutter is made simple, life-span cutter making, sharpening and hydraulic pressure

It is all expensive to bring up to four times of parts

Claims (2)

1, the rolling unit of a kind of lightgage steel joist comprises uncoiling, driving, flattening, leads, sends to, roll forming, survey length, and shearing device is characterized in that:

(1) putting in order of this unit is: uncoiling, flattening, guiding, survey are grown, are cut off, send to and roll forming;

(2) this unit by a motor as flattening, cut-out, traction and rolling power;

(3) shearing device is relative up and down a pair of rotor, a rectangle cutter is housed on each rotor, and every have four swords to cutter, and blade is a straight line, blade becomes a small α angle with the axis of rotor, the rotor axis becomes (90 °-α) angle with the longitudinal direction of unit; Two cutters of installing on two rotors keep a wrong cutter amount b in vertical direction up and down, keep a wrong cutter amount a in side direction; One photoelectric encoder is housed on the rotor, measures the error of rotor stop position and assigned position, this signal is transported to microsystem, control next time rotor actuation time by microcomputer, with compensating error;

(4) carry-over pinch rolls are big than the nip rolls diameter, are with a freewheel clutch in the nip rolls gear-box.

2, according to the rolling unit of the described lightgage steel joist of claim 1, it is characterized in that described two cutters wrong cutter amount b in vertical direction, its value is 0.2～0.6mm, two cutters are 0.03～0.8mm in wrong its value of cutter amount a of side direction.

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