Balancing Machine for Vehicle Wheel and Tire Sets
420 RBLR

Range of application
Measurement and correction of unbalance in two planes in automotive wheel and tire sets. Processing of steel and/or light metal alloy rims of various dimensions and tire mounting. Unbalance correction by classified lead weights with integrated or separate clip or graded self-adhesive weights. Use in production environment in mixed operation. With the appropriate conveying system, the machine can be linked with other lines: valve insertion, tire-mounting, inflation and matching, tire stabilization, additional residual unbalance checking, final assembly.

Design
Machine design for modular, building-block approach. Number of stations dependent on the function and required production rate.

Expandable from a manual, single-station machine to a transfer machine with automatic operating sequence.Loading and unloading either by operator or automatically. Simple handling, easy change over and fast fault-finding through modular concept.

Measured data processing by microprocessor based measuring unit CAB 850 with software package for calculating the optimum correction, statistics, self-test, etc.

Integrated unbalance correction change over from manual knock-on to automatic adhesion of correction weights.

Operating sequence

• Feed the wheel into the measuring station, center by the outside diameter, lower the wheel onto the balancing unit and clamp.
• Measuring run to determine the unbalance amountsand angles, index the wheel and mark the correction angles.
• Unclamp, lift and advance the wheel to the correction station.
• Depending on the correction method in the correction station(s), knock-on, self-adhesive, clip-on weights or clamps can be attached manually or automatically. Sometimes the wheel is rotated to facilitate correction in the lower plane.
• Move the wheel out of the machine and transfer it to the following station. 

The vertical-axis measuring station has a rugged, sub-critical suspension system for unbalance measurement in one or two planes, a precision balancing spindle and high-accuracy clamping adapter for centering. Depending on the application, this is supplemented by a lifting table, centering or singling stations and marking devices. Automatic type identification or integrated run-out measurement are available as options. The entire measurement run includes automatically controlled indexing and marking of the unbalance positions.

A number of solutions exist for unbalance correction that can be applied for the required level of automation. The classic method is manual attachment by hammering on weights with integrated clips. With normal cycle time requirements this method is proven when the measured and marked wheel is vertically-oriented during correction.

The operation is more effective and ergonomic with a balancing stand with rollers and integrated rotating device so that the wheel is horizontal for correction weight attachment. The weights are located in bins with correction lamps, either to one side or above the roller conveyor.

For higher production modules for automatic handling of the correction weights are available. This clip and weight attachment device is suitable for semi-automatic attachment of clips and weights

More flexibility is achieved with respect to the mounting sequence and the form of correction weights by this multi-axis industrial robot that can attach correction weights fully automatically. An advantage of this correction method is the minimal residual unbalance and the resulting lower rejection rate.

Automatic clip insertion devices are also available. Insertion of the clip serves as an orientation guide for the operator for the location of the weights.