• Inner and outer rings
• rollers
• balls
• cages
• seals

Demagnetizers for assembled bearings:

• Ball and roller bearings, single and double row

During the grinding process, the bearing components are held in place by magnetic chucks that provide an optimal grip, essential for the machining of the component. Once the grinding  is complete, the bearing components are detached from the magnetic chucks thanks to an inversion of the polarity, which causes a first slight demagnetization. In this phase of the process, depending on the material, the strenght of the magnetic field of the clamps, the orientation of said clamps, a magnetism usually between 10 and 120 A/cm (12.5 and 150 Gauss) remains. Depending on the dimension of the parts, different residual magnetism values are required: minimum values for small components and greater values as the sizes increase. The values required are usually between 2 – 12 A/cm (2.5 – 15 Gauss). The main causes of magnetization of bearing components are:

• holding with magnetic chucks, grinding and similar machining
• magnetoscope and cracks analysis
• contact with other magnetized components

The main causes of magnetization of assembled bearings are:

• components not demagnetized correctly
• riveters and induction machines for the assembly
• some assembly machines
• some laser markers

To get the best demagnetization result it is essential to first demagnetize the components separately (inner ring, outer ring, rollers, cages and seals) and then when necessary, the assembled bearing. All the components of the bearing and the bearing itself must be demagnetized at excellent values, since high residual magnetism is the cause of many problems. During the production process: the residual magnetism makes a quality washing impossible. Direct consequences on the finished product:

• friction
• limited fluency
• loud noise
• early wear and reduced life

Bearing components  or assembled bearings that have not been demagnetized properly have quality characteristics that are much lower than bearing that has been demagnetized at a minimum residual magnetism value. The demagnetizers available for bearing components  or assembled bearings are different for each other depending on part dimensions and transfer system. Several demagnetizing solutions are available: in line demagnetizers installed in flexible conveyor chains, demagnetizers for rolling channels, demagnetizing units with integrated conveyor belt or compact conveyor belt. Demagnetizers installed in robotized cells and automated processes, manual and off line demagnetizers.

In addition to the high degree of demagnetization, the automotive industry requires a high degree of reliability, High productivity, system flexibility to be modified and reused for different components, ease of use and minimum maintenance. Check the characteristics and the performances of the demagnetizers >

The demagnetizers installed in plants of automotive and engine components can be very different from one another, depending on the specific application. We have several optimised solutions adjustable to the production process depending on: the part geometry, the part transfer system (for single parts or parts placed inside washing of transport baskets), in line or manual off line processes.

In accordance with the specific requirements of the customers we have developed demagnetizers for: injectors, injector components, valves, con rods, cam shafts, piston rings, piston pin, fuel rail, flywheels, o rings, wheel hubs,  shafts, pump bodies, pins, rings and bearings, wheel gears, wheel housings, cylindrical gears and tapered gears, geared shafts, cylindrical crowns, synchroniser components, clutch assemblies,  clutch shafts, hoses, clutch cones, hubs, sprocket wheels and many other parts. Holding with magnetic chucks, lathing, magnetoscopic checking, handling with magnetic lifter, are some of the most frequent causes of the magnetization of parts. Unable to wash, handicaps and slowing down during the productive process, early wear and limited life of the components, are some of the  serious consequences of the magnetism of the parts.  Verify of the causes and consequences of the magnetism >

During the production process, high quality demagnetization ensures the optimal washing of the part. Where the washing systems are equal, the better is the demagnetization quality, the better is the quality and the final result of the washing. The magnetism of the parts added to the machining involved, impedes the correct transfer of the parts that might stick to the tools or to other metal parts of the machine, causing machine downtimes and unjustified costs.

A demagnetized component sensibly contributes to the overall quality of the finished product. Highly critical components, subject to high work stress where duration and reliability  are required must be subjected to an excellent demagnetization. Engine components, transmission parts, not correctly demagnetized wear out easily thereby reducing the duration of the parts themselves.

The directives of the aeronautical authorities impose multiple checks to be carried out on aircraft. Aeronautical maintenance and engineering companies are committed to ensure the highest safety and quality standards.

There are many parts and components subjected to testing, repairs and overhauling. For example, the parts and the components of the engines are dismantled and checked with the maximum accuracy. For some of these parts, after the repair, the overhaul and the magnetoscopic controls, an excellent demagnetization is required.

Depending on the parts to be demagnetized and the residual magnetism required, we are able to provide specifically tailored solutions to ensure the highest degree of demagnetization.

Your demagnetization requirements

• demagnetizers for springs and micro springs
• demagnetizers for blades
• demagnetizers for various types of tools
• demagnetizers for bars, pipes and tubes
• demagnetizers for nuts and bolts
• demagnetizers for sintered, forged or cast parts
• demagnetizers for dies and tool
• demagnetizers for medical instruments and tools

Your demagnetization requirements

• Cross-sectional drawing of the conveyor chain with dimensions
• The materials of the conveyor chain

The Demagnetizers consist of an electronic control cabinet with support and a separate demagnetization coil. Depending on the customer needs, demagnetizers can be supplied with or without support.

Process Description:

The parts are transferred  from the line one at a time, inside the demagnetization coil. When the part is in the middle of the coil, the demagnetization impulse is imparted without it being necessary to stop the part and without any magnetic retention. Various electronic control units and coils are available according to the sizes of the parts.

Characteristics and Advantages:

• Minimum residual magnetism
• Demagnetization of the single part
• Minimum energy consumption (< 150 W)
• High productivity: up to 2 sec, depending on part size.
• No magnetic retention
• Easy installation
• Almost zero maintenance

Options:

• Support for the electronic control unit
• Cable length between electronic control unit and coil

Applications:

• Automotive Manufacturers
• Bearing Manufacturers

Technical data required for a quote:

• Parts geometry
• Minimum and maximum parts dimensions
• Flexlink, Rotzinger, Bosch flexible chains: specify model
• Other flexible chains: a) section drawing with dimensions b) chain materials (e.g. aluminium structure, plastic chain)
• The cycle time (parts/hour);
• Working hours/day
• Minimum residual magnetism required

• DU1 and DU2 Models: demagnetizing units with compact conveyor belt consisting of an electronic control cabinet and separately, a conveyor belt with integrated coil.
• DU3, DU4 and DU5 Models: completely integrated demagnetizing units consisting of an electronic control unit and a conveyor belt with coils, in a single machine.

Examples of installation:

• installed in line between two rollers conveyors
• installed in robotised cells with automatic part loading-unloading
• used off lined by the operator, with manual part loading-unloading

Characteristics and Advantages:

• Compact: very small dimensions, according to the parts to be demagnetized
• High productivity
• Minimum energy consumption (< 150 W)
• Easy installation
• Easy interface and I/O exchange with the line
• Almost zero maintenance

Options:

• Manual versions, with manual coil height adjustment
• Automatic versions, with automatic coil height  adjustment
• Two-directional conveyor belt motion (weight limits for some models)
• Possibility of planning the dedicated signal exchange with the line
• Possibility of installation of customised control panel
• Waterdrip: machining liquid collection tank

Applications:

• All manufacturers

Technical data required for a quote:

• Part geometry
• Minimum and maximum part dimensions
• Max weight of the parts
• Demagnetization of the single part or part placed in container
• Dimensions of the container (L x W x H)
• Material of the container
• The cycle time (parts/hour)
• Working hours/day
• Parts transfer system
• Minimum residual magnetism required

• Demagnetization of single parts
• Simultaneous demagnetization of several parts
• Demagnetization of parts placed in washing or transport containers

The Electronic impulse demagnetizers, installed in automated processes with part transfer with robots/mechanical arms, can be designed to be adapted for different configurations. Possibility of demagnetizing the single part, or more parts at the same time. These models can also be designed to demagnetize the parts placed inside washing or transport baskets. Depending on the parts to be demagnetized, the cycle time and the type of robot clamps, it is possible to design made-to-measure solutions according to the customer’s requirements. Easy operation thanks to the exchange of signals between the demagnetization electronic control units and the line.

Example of operation:

• The demagnetization coil is free (no part presence) => enabling signal for part loading;
• The robot positions the part on the demagnetization coil;
• The electronic detects the presence of the part and releases the demagnetization impulse;
• The electronic provides the process end signal => enabling signal for part unloading;
• The robot unloads the demagnetized part and the process continues

The communication signals between the electronic and the line can vary according to the specific application.

Characteristics and Advantages:

• Demagnetization of the single part or more parts together
• Demagnetization of parts placed in a container
• High productivity
• Minimum energy consumption (< 150 W)
• Easy installation
• Almost zero maintenance

Technical data required for a quote:

• Part geometry
• Minimum and maximum part dimensions
• Demagnetization of the single part or parts placed in a container
• Dimensions of the container (L x W x H)
• Material of the container
• Positioning of the parts inside the container
• The cycle time (parts/hour);
• Working hours/day
• Description of the robot process
• Description of the type of clamping
• Minimum residual magnetism required

Applications:

• All manufacturers

• With the electronic control unit and coils integrated in a single machine
• With separate electronic control unit and coils

Example of operation:

• The operator positions the part or the container with the parts on the demagnetization coil.
• The op. pushes the demagnetization button: the demagnetization is instantaneous.
• The op. unloads the demagnetized part or the container with parts.

Characteristics and Advantages:

• Simplicity and speed of use
• Compact: very small dimensions
• Minimum energy consumption (< 150 W)
• Easy installation
• Almost zero maintenance

Options:

• Possibility to programm dedicated signals, e.g. for signal exchange with traceability devices
• Possibility to install dedicated lamps for the operator

Technical data required for a quote:

• Part geometry
• Minimum and maximum part dimensions
• Demagnetization of the single part or parts placed in container
• Dimensions of the container (L x W x H)
• Material of the container
• Positioning of the parts inside the container
• The cycle time (parts/hour);
• Working hours/day
• Minimum residual magnetism required

Applications:

• All manufacturers

Demagnetizers in line, installed in rolling channels for the demagnetization of the single part. The electronic impulse demagnetizers D-V series, in line for rolling channels, demagnetize round metal parts: rings, rollers and cylinders. Usually installed after the grinding machine, when the part rolling slowly by gravity is in the centre of the coil, the impulse demagnetization is released without the need of stopping the part. For medium-sized parts, the demagnetization coil is fitted with a stop device for stopping in the centre of the coil. This demagnetizer is only indicated for small and medium-sized parts.

Characteristics and Advantages:

• High productivity: up to  2 sec, depending on part size.
• Minimum energy consumption (< 150 W)
• Easy installation
• Almost zero maintenance

Technical data required for a quote:

• Part geometry
• Minimum and maximum part dimensions
• Max weight of the parts
• The cycle time (parts/hour)
• Working hours/day
• Minimum residual magnetism required

Options:

• Support for the electronic control unit
• Cable length between electronic control unit and coil

Applications:

• Bearings manufacturers
• Automotive manufacturers

Machine “TYPE 2″
Dimension range: Bearings Ø 100 -  360  mm.  Height  16 – 58  mm.

Performances:

• Ball presence check ( except for blind bearings)
• Blind bearings : it is possible to take the measurement, by positioning a small tool on the cage
• Measurement of the contact angle: direct display in degrees and tenths of a degree (e.g. 16,5 °)
• Range of measurement :  0 -  89.9 °
• Resolution :  0.1 °
• Measurement precision :  ±  0.20 °
• Cycle time : machine type 1 - 14  Sec; machine type 2 - 17  Sec
• Productivity/hour :  machine type 1 - 250 bearings; machine type 2 - 210 bearings
• Memory  :  1500 types of bearing
• Data to set (only the first time, from the machine panel or by means of PC): type of bearing, pitch diameter, ball diameter, num.balls , no. run-in revolutions, no. measurement revolutions, spindle load.
• For acceptance-refusal of the bearing, for every type of bearing, it is possible to set the min-max value of the contact angle. ( e.g.  25,0° ±  2,5° )
• The machine displays the contact angle: A) Fixed, black on white, for the values in the range set B) Flashing, for the values outside the range set , with a signal for the refusal of the bearing
• Direct display of the load: machine type 1 daN 1.5 – 47;  machine type 2 daN  2.7 – 76
• Auto-diagnosis : malfunctioning signals
• The machine can be connected to a  PC for uploading and downloading data (e.g. measurement reports)
• Memory capacity :  approx  18.000 measurements

Options: A) The machine can control a sorter up to 12 channels, to be used  with an automatic bearing loading/unloading system. The sorter programmes can be set and modified. B) measurement tools: we can construct them or supply the drawings for you to construct them