Description
Magnetic chucks include several types such as electromagnetic chucks, permanent magnetic chucks and permanent electromagnetic chucks, each having particular functional features.
In the machining industry, it has been known since the beginning of the 20th century to apply magnets to holding workpieces. In particular, recent technological development has expanded applications of magnetic chucks from grinding machines only to heavy duty cutting processes by machining centers, lathes, milling machines, etc. Today the applications have further been expanded to include metallic mold
machining and electric discharge machining. Thus, the magnetic chucks that meet these high precision machining requirements play a very important role in many machining fields.
In addition to magnetic chucks, GME offers chucks designed for nonmagnetic materials to respond to requirements in grinding of various materials. We believe you will find products in this brochure that meet your diversified needs.
Overview and features of chucks:
Electromagnetic
Chuck
1. Very efficient since workpieces can be loaded/unloaded just by switching operation.
2. Automatization in machining process is realizable by interlocking the chuck with the machine tool.
3. Attraction is electrically controllable.
4. Easy to make larger type of chuck.
Water-Cooling Type
Electromagnetic
Chuck
1. Constructed to reduce heat generated during power on by water cooling.
2.Used for high precision operations and exhibits features of electromagnetic chucks effectively.
3.Most suitable for dry grinding.(Heat from workpieces is absorbed also)
Permanent
Electromagnetic
Chuck
1. Very effcient since workpieces can be loaded/unloaded just by switching operation.
2. Energy-saving, since electric power is used only mome-tarily for loading/unloading workpieces.
3. High accuracy due to no change with time passage.
4. Never any trouble due to suspension of powder supply.
Permanent
Magnetic Chuck
1. Energy-saving type, requiring no power source. No fear of power failure and can hold workpieces for a long time.
2.No heat generated and thus no thermal distotion due to temperature rise.
3. Uniform magnetic force irrespective of chuck sizes.
Sine Bar Chuck
1. Magnetic chuck equipped with sine bar for high precision grinding and inspection.
2. Precisely finished to overall accuracy of 0.05mm or better.
3. Various types are available from electromagnetic, water-cooling electromagnetic, permanet magnetic and permanent electromagnetic chucks.
Vacuum Chuck
1. Holds workpieces by action of atmospheric pressure
2.Vacuum chucks nonmagnetic materials.
Promote System
1. Secures workpieces to a special chuck using workpiece fixinig material.
2. Secures nonmagnetic materials.
Standards of electromagnetic chuck:
Length or diameter of face plate
up to 300
Above 300,up to 600
Above 600,up to 900
Above 900
Surface roughness:6.3S
Mounting face: Not convex
Flatness
0.01
0.015
0.02
0.025
Parallelism
0.02
0.03
0.04
0.05
Holding power
The holding power on the chuck face plate must be 98.1N(10 kgf)or over in average and 49N(5kgf)or over in the weakest area.
Withstand voltage
Dielectric breakdown between the charged part and the body is not allowed.(1500VAC,1min)
Insulation resistance
The insulation resistance must be 5ΩM or over.(Measured with 500 V insulation resistance meter)
Temperature rise
The temperature rise on the chuck work face must be below 15ºC.(Powered on for 3 hours)
Water resistance
When a chuck is immersed in water, it must not allow water to enter the inside or its insulation performance must not drop.
Note: The standards of the holding power and temperature rise vary according to models.
Types of chuck
Complaint
