HIGH SPEED SHEAR

General Description:

The shear has a special design for Downside to Upside cutting motion. It is operated by electric motor with converter control system.

Note: Conventional Pneumatic Clutch system is not used any more in Electronic shears, because electronic system permits increase of processing speed without any maintenance troubles.

Mainframe base structure is of fabricated carbon steel and assembled on the base frame with the bridle rolls and it is equipped with:

• Housing stands and blade support frame - carbon steel fabricated and stress relieved.
• Bottom blade support frame is operated by motor and eccentric’s shaft.
• The top support frame comprises of a pair of precision mating wedges for GAP control, with visual index.
• Set-in mechanism for cutting blade support located at the bottom side.
• Four lines cutting blade design.
• Bottom blade with butterfly cutting line shape ( X line shape )
• Eccentric shaft , driven by A.C motor with vector frequency converter.
• Gearbox equipped with tempered and grinded gear and parallel shafts.
• Centralised and automatic lubrication system for all components at working motion.

Main characteristics:

Shearing capacity	mm.	200 x 3 (*)
Cutting speed	seconds	0,1

(*) Other required thickness available

TABLE OF PRODUCTION – Standard rates (1)

BLANKS LENGTH mm.	N°. of FORMATS / Min. (Working Capacity)	PRODUCTION SPEED Mts. / min.
150	120	18
300	108	32,4
400	96	38,4
500	85	42,5
600	78	48,6
800	63	50,4
1.000	56	56
1.500	52	78
2.000	41	82
3.000	30	90
4.000	22,5	90
5.000	18	90
6.000	15	90

(*)Other rates requirement available

PROCESSING MATERIAL SPECIFICATIONS

Formats

		Min.	Max.
Formats Length	mm.	150 (*)	3.000(*)
Formats Width	mm.	400 (*)	2.000(*)

(*) Available for Other required dimensions. To be agreed with customer

Standard Tolerances average. (For formats length of </=2000 mm.)

Length	+/- 0, 15 mm.
Diagonal	+/- 0,5 mm.

MOTORS LIST

Equipment name	Power Kw	Speed r.p.m.	Quantity
Pinch rolls	22	0-1000	1
Shear	25	1000	1

MAIN ADVANTAGES & DESAVANTAGES of Electronic Shear VERSUS Rotary Shear.

Item	Advantages	Disadvantages
1	Higher production rates for lengths lower than 600 mm.	Slightly Lower production rates for lengths between 600 - 1200 mm.
2	Similar productions rates for lengths higher than 1200 mm.	Similar productions rates for lengths higher than 1200 mm.
3	Higher accuracy & precision & quality on Diagonal dimension. Better square quality of finished products
4	Half power consumption than Rotary Shear
5	Lower noise level because clutch system is not required
6	Cutting motion is from bottom to top side. No scratches on stacker
7	Lower maintenance required
8	Higher performance rate when “Heavy Duty Service” is required because mechanical concept of Electronic shear is better adapted for metal strip cutting motion than Rotary system.
9	Lower Price
10		Metal strip must be stopped when cutting
11		Strip loop is required in Rotary also to get similar square precision like Electronic Shear