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Bend Specimen Cutting System
The Fischer Engineering Company Model BSC Bend Specimen Cutting System consists of an indexing base (BSC-IB) and heavy-duty fixtures for high production cutting of bend specimens from welded plates and pipes. It can be mounted on several models of HEM, Hyd-Mech, Marvel and other vertical tilt band saws with 20” upper guide height. The preferred blade is 1-1/4 inch wide x 0.042 thick with a 3-4 or 2-3 variable pitch.
plate bend specimen cutting fixture can be used with some conventional vertical
band saws that have at least 14" upper guide height and hydraulic or
air-driven table feed. The preferred blade is 1 inch wide x 0.035 thick with a
3-4 or 2-3 variable pitch.
The preferred blade is 1 inch wide x 0.035 thick with a 3-4 or 2-3 variable pitch.
The Model BSC does not require any special exhaust or ventilation system. It also does not have the high noise level associated with systems using abrasive saws.
The system is mounted on the front end of the saw worktable, within easy reach of the operator. The system does not necessarily have to be removed to use the saw for other purposes, although the normal stock capacity may be reduced by as much as 50-67% if the system is left in place.
A Backing Bar Cutting Fixture (BBC), for cutting the excess backing bar material from plate face, root, or side bend specimens is also available. This fixture is not mounted on the BSC-IB, but held in the saw vise. The BBC can be used without removing the BSC-IB.
The photo shows the BSC-IB mounted on an HEM Model V100HLM-3 saw. The BSC-IB indexing base can be lifted into place or removed by two workers or by hoist. The BSC-IB is secured to the saw T-slots with 2-4 bolts. The individual plate or pipe fixtures are mounted on the indexing base with 2-3 bolts. The operator can interchange fixtures in a matter of minutes.
The operator also interchanges templates, attached by 2 screws, that control the cutting width of bend specimens and the distance between specimens. Before using a new template he aligns the saw blade in a fixture slot and slides the template until the appropriate notch is engaged with the latching mechanism. He then tightens the 2 screws.
The home position and depth of cut is automatically controlled by the system if Fischer Engineering Company provides the saw. If the system is mounted on a manual customer-supplied saw, the customer will have to set up a method for controlling the home position and depth of cut.
Except on high-end, fully automatic saws, the operator controls both the advance and retraction of the blade. With the HEM Model V100HLM-3 automatic saw, the blade is started and advanced by a single switch. The blade retracts to the home position and stops automatically. On this saw, cutting time is about 3-5 minutes per bend for steel.
The main laborsaving advantage of this system is that the operator does not have to measure cutting distances or widths. During the time between cuts he can identify specimens to be cut from the next sample using a pen marker. Usually this is done before cutting since a coolant is used during cutting.
Check the following links for details on the optional fixtures available:
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