Locating points

Question 1

: Good facilities should be provided for locating the work.

Answer 1

LOCATING POINTS

Question 2

Location 1:
 Location should ensure _______
throughout all sequence of operation.

Answer 2

equal distribution of forces

Question 3

Location 2: Location should be

Answer 3

hard resistant, wear resistant and
high degree of accuracy.

Question 4

Location 3:
 Movement of workpiece should be ____.

Answer 4

restricted

Question 5

Location 4: Should be _____ to avoid improper locations of
the workpiece

Answer 5

fool proofed

Question 6

Location 5:  Should facilitate _____

Answer 6

easy and quick loading of workpiece.

Question 7

Location 6: should be avoided.

Answer 7

Redundant Locators

Question 8

Location 7:  _____ must be avoided.

Answer 8

Sharp corners

Question 9

Location 8:  At least______ should be established.

Answer 9

one datum surface

Question 10

The devices that restrict a workpiece’s movement are the ____4.

Answer 10

locators

Question 11

All twelve degrees of freedom must be ______ of a workpiece.

Answer 11

restricted to ensure proper referencing

Question 12

are fixed-height locators. They precisely locate a surface in one axis. Though solid supports may be machined directly into a tool body, a more-economical method is using installed supports, such asrest buttons.

Answer 12

Solid Supports

Question 13

are variable-height locators. Like solid supports, they will also precisely locate a surface in one axis. These supports are used where workpiece variations require adjustable support to suit different heights. These supports are used mainly for cast or forged workpieces that have uneven or irregular mounting surfaces.

Answer 13

Adjustable supports

Question 14

are a form of adjustable support used when a compensating support is required. Although these supports can be fixed in position, in most cases equalizing supports float to accommodate workpiece variations. As one side of the equalizing support is depressed, the other side raises the same amount to maintain part contact. In most cases adjustable and equalizing supports are used along with solid supports.

Answer 14

Equalizing supports

Question 15

Locating a workpiece from its ______ is the most-common locating method.

Answer 15

external edges

Question 16

The bottom, or primary, locating surface is positioned on three supports, based on the geometry principle that three points are needed to

Answer 16

fully define a plane.

Question 17

Two adjacent edges, usually _____ to each other, are then used to complete the location.

Answer 17

perpendicular

Question 18

The most-common way to locate a workpiece from its external profile is the _____

Answer 18

3-2-1, or six-point, locational method.