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Basic knowledge of machining

Jun 22, 2020

30. The composition and function of machine tool fixtures?

The machine tool fixture is a device for clamping the workpiece on the machine tool. Its function is to make the workpiece have a correct position relative to the machine tool and the knife. And keep this position unchanged during the processing.

The components are:

(1) Positioning element or device

(2) Tool guide element or device

(3) Clamping element or device

(4) Coupling element

(5) Clip specific

(6) Other components or devices

The main function:

(1) Guarantee processing quality

(2) Improve production efficiency

(3) Expand the process scope of machine tools

(4) Reduce the labor intensity of workers to ensure production safety.


31. According to the scope of use of fixtures, how to classify machine tool fixtures?

(1) General fixture

(2) Special fixture

(3) Adjustable fixture and group fixture

(4) Combined fixture and random fixture


32. The workpiece is positioned in a plane. What are the commonly used positioning components? And analyze the elimination of degrees of freedom.

The workpiece is positioned in a plane. Commonly used positioning elements are:

(1) Fixed support

(2) Adjustable support

(3) Self-supporting

(4) Auxiliary support


33. The workpiece is positioned with a cylindrical hole. What are the commonly used positioning components? And analyze the elimination of degrees of freedom.

The workpiece is positioned with a cylindrical hole. Commonly used positioning elements include a mandrel and a positioning pin


34. What are the common positioning elements for positioning the workpiece on the outer surface? And analyze the elimination of degrees of freedom.

The workpiece is positioned on the surface of the outer surface. Commonly used positioning elements are V-shaped blocks

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