Due to the circumstances regarding manufacturing costs and assembly accuracy competitiveness, holding techniques that can cope with components with varying quality features. Here, we will discuss some work holding techniques and locating pin application examples that are not affected by parts with incomplete burr removals.

(1) About burrs on parts

The burr removal techniques were previously discussed in Vol. 289. Parts that are machine processed have burrs on them due to the elongating nature of the metals. (Photo 1)

(2) When locating with external features

• There are burrs on parts not chamfered. Therefore some relief features must be provided for the corners.
• [Fig.1] shows the fundamental countermeasure for the burrs. Application variations of this would be to locate on external profile with pins, and other different shapes.

(3) Application example of locating pins

Locating pins are used according to the quality (burrs) of the parts to be located.

a) When the parts are not de-burred ([Fig.3-1])

b) When the parts are de-burred ([Fig.3-2])