Our machines for measuring, balancing or moving the axis of gravity or the center of gravity of crankshafts, cardan shafts and connecting rods are individually developed and have a modular structure. So they can grow with your requirements at any time.
Machines for balancing crankshafts. The choice is yours: We offer pure unbalance measuring machines without unbalance correction, but we also combine this with a processing station that automatically compensates for the unbalance by drilling. Depending on your requirements for precision and cycle times in series production, we design these balancing machines as one or two-station machines. With our two-station machines, cycle times under 40 seconds can be achieved. Since our machines work according to the displacement measuring principle, you do not need a complex foundation. Even interfering vibrations from passing forklifts or machines set up in the vicinity do not affect the quality of the results. With the help of our highly developed software, the measured unbalance is optimally distributed to the available compensation planes and angular positions.
Hofmann also offers adapted concepts for small series or pure control machines: Our universal balancing machines can also be equipped with manual drilling compensation.
Hofmann machines for mass centering crankshafts can determine the gravity axis of cast or forged blanks. Crankshafts pretreated in this way have a low input unbalance. As a result, this means: reduced cycle times and a much more efficient balancing process!
Machines for balancing cardan shafts. On the balancing machines from Hofmann, single or multi-part shafts with intermediate bearings in suitably rigid spindle bearings can be balanced up to the maximum operating speed. The balancing process is fully automated - starting with the precise repeated clamping, screwing into the compensation positions, welding on the
correction weights up to opening the machine cover. Cycle time optimizations are possible with our specially developed welding turret: This means that several welding weights per compensation level can be welded on in one step. Intelligently designed intermediate storage stands and interception devices allow the machines to be quickly and conveniently converted for different workpieces.
Machines for taring connecting rods. The weight distribution of connecting rods is determined in connecting rod balancing systems and achieved extremely reliably from the small to the large eye through milling and automatic 3D deburring. The connecting rod systems from Hofmann are characterized by very short cycle times of less than 5 seconds, high precision and convenient handling.
Types: KHK21-BL1, KHK21-BL1, KHK12-BL1, KHK21-BH2
These balancing machines are usually loaded with the aid of a loading gantry, have a modular structure and allow an extension that can be adjusted to the production conditions. They are designed to balance crankshafts in multiple correction planes in one or more steps.
Single-station measuring machine with machine cladding and two-part access door. The measuring system comes with servo drives (master/slave), axial and radial alignment system and maintenance-free sensors. The measuring frame is lockable, and the temporary resting position is linearly adjustable. The measuring drive is equipped with supporting V-blocks and tension levers, and weights to compensate asymmetrical parts can be mounted on disks. After the measuring process, the interlinked system enables the transmission of coordinates in X and Y components to the subsequent OP. Operation occurs from a 19“-touchscreen (manual functions of WIN CC and measuring computer operation (Windows®)).
Type UHK 12-ZM1
Single-station balancing machine with machine cladding. The measuring system consists of force-measuring, permanently calibrated bearing pedestals that feature an easy adjustment in T-slots and locking using an open-end wrench. For a new rotor type, only the correction planes and radii are to be entered in the measuring system. The measuring drive is implemented as a belt drive with asynchronous motor which is horizontally adjustable on linear guides. Operation is performed via a 19” touchscreen.
Types: UHK 12, UHK 16, UHK 19
Single-station balancing machine with sliding guard or guard fence. The measuring system consists of a frequency-controlled belt drive, maintenance-free measuring transducers and axially adjustable bearing pedestals with hardened measuring rollers and thrust stops. A lifting device to take up the drilling forces is available. The measuring drive is a belt drive. A drilling spindle arranged in the gantry performs the unbalance correction with a manual or an automated feed slide. The unit is manually supported by a line laser, positioned to the correction planes and clamped pneumatically. Operation occurs from a 19” touchscreen (manual functions of WIN CC and measuring computer operation (Windows®)).
Hofmann Model 1424W offers up to four (4) plane driveshaft balancing for passenger cars, light trucks and commercial vehicles.
The type PHW measuring and taring machines are put together based on the required cycle time and the scope of performance (deburring, brushing). The full assembly enables the weighing and taring of both connecting rod end bores and deburring with a cycle time of approx. 4.8 seconds.