ZERO POINT CLAMPING SYSTEM
UNIQUE BENEFITS
ZERO POINT
Conventional Systems
Very high accuracy using the HSK principle. On insertion of the stud, the tapered ring of the clamping pot expands slightly within its resilient range. This results in absolutely zero-play high precision seating with a repetition accuracy of 2.5 µm (0.1 thou) .
Usually a mating fit is necessary (for instance 32 mm h5/H5 for studs and sockets). The combination specified permits a minimum play of 0 µm and a maximum play of 22 µm (0.9 thou). Under such conditions, how can repeat accuracies up to 2.5 µm (0.1 thou) be achievable in series production? In general uses three types of studs (zero pins, floating or sword pins, and free pins). Logistically complicated. Documentation must be maintained for each fixture detailing which type of stud must be fitted at each position and at what angular position. High risk of errors! Rigid system with 3 different types of stud. Thermal effects and pitch errors lead to asymmetrical displacement relative to the zero pin. (On a round table the center of the pallet is displaced away from the axis of rotation).
Just one type of clamping stud is required. Logistically simple to manage, since there is only one type of stud that must be screwed into the available stud hole. No differentiation between zero pins, floating pins and free pins. Thermal symmetry Compensates for thermal effects and for pitch errors. The tapered rings always compensate errors relative to the center of the clamping points. (For instance on a round table the center of the pallet always remains centered on the axis of rotation). No self-locking In the event of a crash the fixture or the clamping device yields and thereby can save the machine spindle from possible damage. For instance in the event of failure of the energy supply push-out screws can be used to remove the fixture. No tilting Uncomplicated insertion and removal , even if skewed or significantly off-center. Pneumatic low-height system The patented design of the spring retainer guarantees very high clamping forces . Normal workshop air pressure is sufficient to release the clamping fixture. Patented design , simple assembly. High reliability is achieved by the use of extremely few and simple components. Even chips cannot compromise the functional principle.
With a self-locking system, the result of a crash is the greatest possible damage. In the event of failure of the energy supply, in most cases the fixture must be destroyed in order to remove the pallet.
In some cases the component must be positioned very precisely and parallel for insertion or removal, because cylindrical or tapered clamping pins with minimum taper must be used. The removal especially of highly asymmetric heavy components is very problematic.
Hydraulic systems have inherent disadvantages: Pump - pipework - collisions - leakage - bleeding etc. Pneumatic systems are often installed at significantly greater heights.
Complex mechanisms with ball cages, pistons, actuators and other components. When they are clogged with chips there is always the risk they will jam or malfunction.
847-367-4800 | lyndexnikken.com
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