Question

To make sure a part is accurately located in a vise through the application of 3-2-1 concept, the machine operator must use:

a) parallel bars placed between jaws
b) a vise stop on the side
c) a V-clamp attached to the vise
d) a strap clamp attached to the vise
e) any of the above

Answer 1

To accurately locate a part in a vise using the 3-2-1 concept, a machine operator could use parallel bars, a vise stop, a V-clamp, or a strap clamp. Any of these tools can help achieve the multi-point positioning required. The correct option is 'any of the above'.

Step-by-step explanation:

The 3-2-1 concept in machining refers to the use of three points of contact to locate a part in one axis, two points of contact to locate it in the second axis, and one point of contact to locate it in the third axis. This method ensures accuracy and repeatability when securing a part in a vise. To make sure that a part is accurately located in a vise using the 3-2-1 concept, the machine operator could potentially use:

• parallel bars placed between the jaws of the vise,
• a vise stop on the side,
• a V-clamp attached to the vise, or
• a strap clamp attached to the vise.

Each of these options can be used to create the various points of contact needed to follow the 3-2-1 method of part location. The correct option in the final answer is e) any of the above, as all the mentioned tools are employed to accurately position a workpiece in a vise.