First need to see the well-known brand of this second-hand high-speed press

Overseas secondhand high speed fine punch well-known brands even secondhand price is higher than China's, overseas stator rotor high-speed punch and points in France or Japan, the price of 2 countries apart is not large.

Famous brands and manufacturers, select high-quality manufacturers and perfect design of the products, car manufacturers product quality, do a certain type of high speed stamping time more than 5 years and customers are stable general quality is not easy to be bad to take;

There is also the type of driving force of high-speed punch

Did not say into the traditional punch, or pneumatic fine punch, or high speed punch, prices are many apart

Look at the appearance of second-hand high-speed punch

Look at the dragon or open, high speed precision punch manufacturers housing is cast or steel frame structure.

The accuracy of the

Accuracy, the current stage of the state in 2013 published the open and closed test high speed precision press precision specification (2013 version), depends on whether the automobile manufacturers implement the new specification. Without a good precision is not out of the qualified products out.

Look at the punching die design

1, according to the characteristics of the stamping die design to be carried out, the production and manufacture of large quantities of size, the geometric specifications of stamping parts (to protect the thickness, is not to pull, the appearance design of the test products) and the accuracy of the provisions to make clear:

2, small and medium-sized parts of the production of bending parts polyester parts, the selection of open mechanical equipment punch.

3, in the small and medium-sized stamping parts production and manufacturing use of mechanical equipment punch in the form of closed test structure.

4, small mass production, large and medium-sized thick steel plate stamping parts of the production and manufacturing selection of four-column hydraulic machine.

4.4. In the mass production or many production and manufacturing of complex parts, the domestic high-speed punch or multi-process automatic punch is used.