What are the Methods to Ensure Assembly Accuracy?
- What are the methods to ensure assembly accuracy? How are various methods applied?
1. Interchange method;
2. Selection method;
3. Repair method;
4. The adjustment method.
- The composition and function of the fixture?
A jig is a device for clamping a workpiece on a machine tool. Its function is to make the workpiece relative to the machine tool and knife have a correct position. And keep this position constant during the process of processing.
The components are:
1. Positioning element or device.
2. Tool guide element or device.
3. Clamp component or device.
4. Coupling elements.
5. The concrete.
6. Other components or devices.
Main functions:
1. Ensure the processing quality
2. Improve production efficiency.
3. Expand the scope of machine tool process
4. Reduce the labor intensity of workers to ensure production safety.
According to the scope of fixture use, how to classify the machine fixture?
1. General fixture
2. Special fixture
3. Adjustable fixture
4. group fixture
The workpiece to the plane positioning, common positioning elements are what? The elimination of degrees of freedom is analyzed.
The workpiece is located in a plane. The commonly used positioning elements are: Fixed support and Adjustable support
The workpiece is located by cylindrical hole. What are the commonly used positioning elements? The elimination of degrees of freedom is analyzed.
The workpiece is located by cylindrical hole. The commonly used positioning elements are: Mandrel and Positioning pin
What are the common positioning elements for the workpiece to be located on the outer circular surface? The elimination of degrees of freedom is analyzed.
The workpiece is located on the surface of the outer circle. The common locating element is the V-block
The workpiece is positioned with "one side and two pins". How to design two pins?
1. Determine two pin center distance size and tolerance
2. Determine cylindrical pin diameter and tolerance
3. Determine the diamond pin width diameter and its tolerance.
