How to choose the right fixture for double disc grinding machine?

As a kind of high-precision processing equipment, the selection of fixture for double disc grinding machine is directly related to the processing quality and productivity of the workpiece. A suitable fixture can not only stabilise the workpiece and ensure positioning accuracy, but also reduce machining errors and extend the service life of the equipment. The following three aspects from the basic functional requirements of fixtures, influencing factors and optimal selection, to discuss how to choose the right fixture for it.  

The basic functional requirements of the fixture

The primary function of the fixture is to firmly fix the workpiece to prevent the position of the workpiece from shifting due to vibration or impact during high-speed grinding. In addition, the fixture needs to meet the following requirements:  

1. high positioning accuracy: the fixture needs to match the height of the table of the double disc grinding machine and be able to accurately position the workpiece to ensure that the grinding surface is parallel to the grinding head.  

2. good rigidity and wear resistance: the fixture must be able to withstand the cutting force without deformation, and at the same time have good wear resistance to extend the service life.  

3. fast clamping and release function: in mass production, the fixture's ease of operation directly affects production efficiency, so the design needs to consider the rapid loading and unloading of the workpiece.  

4. Protection and cleanliness: the fixture needs to be designed with a protective structure to avoid coolant and abrasive chips from entering the fixture, reducing wear and contamination.  

The main factors affecting the selection of fixtures

1. Workpiece shape and material

Workpieces of different shapes and materials require different types of fixtures. For example, thin-walled workpieces require flexible fixtures that can evenly distribute clamping force to prevent deformation, while high hardness materials such as cemented carbide require highly rigid fixtures to provide adequate support.  

2. Machining accuracy requirements

If you need to achieve high-precision machining, you can choose fixtures with high precision and small repetitive positioning error. At the same time, the use of magnetic fixtures or vacuum clamping fixtures to ensure that the clamping process without indentation or damage.  

3. Processing batch and efficiency

For mass production, it is appropriate to use automated fixtures or multi-station fixtures to reduce manual intervention and improve processing efficiency. For small batch or single piece processing, general-purpose fixtures can be selected to reduce costs.  

4. Machining environment

In wet grinding, need to choose corrosion-resistant, coolant erosion-resistant fixture materials, such as stainless steel or nickel-plated surface treatment of the fixture; in the high-temperature machining environment, the fixture needs to have good thermal stability, to avoid thermal expansion to affect the machining accuracy.  

How to optimise fixture selection

1. Customised design

According to the specific needs of the workpiece, choose a combination of standard fixtures and non-standard fixtures. For example, for shaped workpieces, special fixtures can be designed to optimise the positioning method and improve the clamping efficiency.  

2. Clamping force distribution uniformity

Optimising the distribution of clamping force is the key to improving machining quality. For example, the use of multi-point clamping or pneumatic clamping devices can effectively reduce the deformation of the workpiece caused by the concentration of clamping force.  

3. Integrated automation technology

In order to improve production efficiency, an automatic clamping system compatible with the grinding machine control system can be selected to realise fast clamping, automatic positioning and intelligent detection functions, reducing manual intervention and improving overall machining efficiency.  

Summarise

Choosing the right fixture is a key link in the machining process of double disc grinding machine. Combined with the shape, material and processing needs of the workpiece, selecting a fixture with strong rigidity, accurate positioning and convenient operation can effectively improve processing efficiency and product quality. Through the optimisation of jig design and reasonable selection of materials, it can also further reduce production costs and help enterprises to stand out in the fierce market competition.