Knives for metal

Plate tools - cutting edges for drop shears and edge bending tools

The shear cut is almost always used for metal shearing. We offer tools for metal shearing from 0.3 mm to 30 mm thick up to a maximum of 2400N/mm2.

. We offer machine tools from the following manufacturers:

  • Amada
  • Atlantic
  • Beyeler/Sagita
  • Cidan
  • Cincinnati
  • Darley
  • Edwards
  • EHT
  • Haco
  • Lotze
  • LVD
  • RAS etc.
  • Promecam
     

Correct results of the shearing can be secured by:

  1. shearing process
  2. shearing gap
  3. steel quality combined with hardness (HRc)

In the shearing process, the tools go against each other, while the metal is pliably formed at the beginning, up to the point depending on the metal strength when the forming changes into a fracture.

Begin stageStage 1 - formingStage 2 - solution




Steel - quality
 DINA/SiMax. Hardness HRcUsage
Alloy steels 1.2067
1.2714
1.2510
1.2767
1.2363
L3

O1

A2
61
58
62
56
61
simple special knives
knives up to 20mm
knives up to 6mm
knives up to 20mm
knives up to 10mm
High Alloy Steels 1.2631
1.2201
1.2436
1.2379
1.2344



D2
H13
59
62
63
60
55
knives up to 14mm
extra knives
knives up to 4mm
knives up to 12mm
knives up to 20mm
HSS 1.3343
1.3355
1.3333
M2
T1
64
64
63
Special knives
on
elektro metal plates
PM steels ASP2053
CPM10V
  63
63
special knives
special knives




Cross section through the sheared metal




Table showing the size of the shearing gap depending on the thickness and strength of the material
  1. If the shearing gap is too small, the cutoff part is reduced and the shear looks like the letter "S". The tools become blunt earlier and their life is reduced by 30-50%.

  2. If the gap is too large, the metal is broken, the cut is not clean and a massive burr occurs, which is undesirable, e. g. for further processing.

  3. The correct shearing gap should be 2. 8% of the thickness of the metal sheared in materials of about 800 N/mm, a shearing clearance of about 3-5% is recommended in softer metals such as aluminium, copper, and the like.

 

Tolerance table
TerminologySymbolsAccuracy
Parallelism up to 0,005 mm
Flatness 0,1/1000 mm
Straightness up to 0,005 mm
Angularity up to 0,005 mm
Holes through hardened up to 1000 mm length
1000-2000 mm length
2000-3000 mm length
over 3000 mm length
0,5 mm
1,0 mm
1,5 mm
2,0 mm

Contact

MERCEL, cutting knives s.r.o.

Týnišťská 423, 503 46 Třebechovice pod Orebem
50°11'47.917" N 16°0'0.528" E
50.1966442N, 16.0001472E

Telephone:
+ 420 774 887 841
+ 420 495 591 122
+ 420 608 887 841

Fax
+420 495 593 137

mercel@mercel.cz

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