Fully automatic sheet metal forming testing machine - cup convex

Meet the test standards:
National standard GB 15825: Various tests
Cup convexity test meets EN ISO, EURONOM, BS, NF, GOST, UNI, UNE
Deep pull cup test
The deep hole expansion test meets the requirements of Siebel and Pomp (KWI)
Hole enlargement test ISO 16630
FLC experiment meets acc. to ISO 12004

Data parameters:

control system

Adopting Freescale 32-bit Coldfire system embedded industrial control IC
Fast processing speed and stable system.
High sampling frequency, reaching 500SPS (ensuring a data sampling speed of 500 times per second after median filtering and mean filtering, including stretching displacement, stretching force, and edge pressure).
Can form a high-speed closed-loop control system
RS485 online interface, which can directly monitor machine operation and data acquisition through PC.

Mechanical structure:
1. The main body of the bipolar hydraulic cylinder, with the outer center cylinder providing the thrust required for the edge pressing ring; The inner piston provides the thrust required for the stretching mold. The advantage of hydraulic pressure compared to screw is that hydraulic oil has a certain degree of elasticity, which can automatically move forward to provide a constant edge pressure after the template is stretched and thinned, and can form a dynamic balance with the closed-loop control system; The response of screw edge pressing is much slower and the control difficulty is *.
2. Reserve an external LVDT mounting base at the bottom
3. The height of the testing chamber must be increased to 150mm, as the sample may have greater ductility after high temperature, and the displacement during stretching will be greater. If the displacement after the center die is too large, the displacement during stretching may be greater than the height of the testing chamber, which may result in the inability to remove the sample after testing.
4. Whether doing room temperature stretching or high temperature stretching, the above self-aligning thrust device must be configured. In high load tests, if there are differences in the anisotropy of the test plate, it will directly lead to uneven thickness. If an automatic self-aligning device is not configured, the sliding surface area on the thinning side will be too large, and wrinkles will be generated later.
5. The widened test chamber opening allows the maximum width of the sample to reach 300mm under normal temperature testing, so that the wide sheet metal does not need to be cut and can be directly compared in different parts of the experiment.
6. Not only can the upper and lower molds and stamping dies be freely replaced, but the upper and lower mold seats can also be changed according to the situation to customize different experimental requirements.
7. All systems adopt a circular concentric positioning, which has higher concentricity than the four column push-pull system. Moreover, the four column push-pull system does not have concentricity naturally assembled and must be corrected through assembly.

Testing methods: Erichsen cup bulge test, deep pull test, hole expansion test, square cup test, FLC curve test, LDH test, bulge test, lubrication test, 550 ℃ high temperature deep pull test, high-speed deep pull test, Fukui test, Olsen, Swift test, reverse tensile test, precision cutting experiment, hardness test, tensile test, etc