Handling Machining Assembly Organisation Pneumatics Electronics Mechanics Sensorics phần 4 docx

36 99 Examples of pneumatic applications

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With certain presses, for example hydraulic ones, it is not possible to derive an

auxiliary motion by mechanical means. In these cases, pneumatic drives are a

good alternative. In the application shown above, workpieces are punched out of

strip material and it is then necessary to cut the remaining lattice-like waste

material into pieces. The pneumatic drive selected should be capable of comple￾ting the cutting operation with adequate reserve power. Furthermore, the cutting

blade should be inclined to one side of the production line to produce an

oblique cut over a greater distance. This reduces the cutting force required

(although not the cutting work). If the press in question is not equipped with

roller feed, this can also be carried out by pneumatic means, using a combination

of diaphragm pressure units and a linear unit. The diaphragm pressure units are

of very flat design and are advanced alternately in an advance/return rhythm.

Pneumatic components are a highly suitable means of retrofitting devices of this

kind to existing systems.

Suitable components:

Twin cylinder ADVU...

Linear unit DPZJ...

Proximity switch SM...

Pneumatic single pilot valves...

Roller lever valve RIO...

Clamping module EV...

Mounting accessories, Fittings

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Cutting

Pneumatic waste cutter

a) Principle of waste

material cutter

b) Pneumatic feed unit

1 Press ram with blanking

punch

2 Strip of material

3 Lower part of tool

4 Electrical feeler

5Pair of conveyor rollers

6 Pneumatic cylinder

7 Cutter blade

8 Pressure piece

9 Linear unit

10 Clamp plate

11 Strip thickness

adjustment