Application of CNC lathe hydraulic Chuck

Any workpiece processing needs to fix the workpiece fixture, taking CNC lathe, chuck fixture most commonly used, its form and variety, the plant used as the special case of chuck and brief, for business or server reference.
Overview of clamping force:
The chuck is mostly use fluid power to generate the clamping set, there are oil and gas, the two is the most convenient method of clamping automation. In the application of oil pressure, we must first understand the following noun and its physical significance, to know how to use.
A.: the F unit is the Newton (N), or kilograms force kgf.
B. area: A unit is the M2 (square meters), or cm2 (cm ^ 2).
C.: P pressure force per unit area, in physics, you can use the bar as a unit,
Bar is defined as: N/m2 = 10 N/cm2 1 bar=10000.
So, the most basic pressure calculation formula is P= F/A. In the habit of using KGF for power units, so the unit conversion related explanation is as follows:
1 kgf= 9.8 N
1 bar= 10N/cm2 = 10/9.8 kgf/cm2 = 1.03 kgf/cm2
In order to calculate conveniently, usually only uses 1 bar = 1 kgf/cm2.
Hydraulic chuck is relying on hydraulic cylinder drives the push rod and the clamping force (Figure 1), with the big chuck
There are no different, small top, the clamping weight also has difference. The following table is clamped to the sober billion Sichuan Province as an example
Weight limit. It should be noted that, clamping force increases as the speed increases.
The early high speed lathe is mainly by manual chuck, with the progress of technology evolution since the CNC lathe mostly use hydraulic or pneumatic chuck, and manual chuck is clamped by the auxiliary. And with different processing workpieces, chuck applications are also different, the general hydraulic hollow chuck by the push and pull rod limit, the workpiece diameter through hole size if the push and pull rod, taking VT-36 as an example, the push and pull rod via F91, the diameter of workpiece must be less than F91, if the use of pneumatic chuck, workpiece diameter limited in chuck itself through hole, the through hole is larger the diameter can be increased, because of the air pressure clamp force is pressure small, to avoid the workpiece surface pinch can also use pneumatic chuck, according to processing requirements and. But because the pneumatic chuck high price, and the hydraulic chuck is widely used widely, usually CNC lathe or hydraulic chuck for clamping parts.
A. manual chuck:
Mostly used for high speed lathe machining, mold parts mainly, or auxiliary for spindle B end clamping.
Is divided into the front lock and lock; jaw 2 claw, 3 claw, 4 claw... So, right action and single action, a processing requirements, usually 3 or 4 jaw chuck claw, 3 claw can be machined concentric circle, 4 claw can processing eccentric workpiece.
B. pneumatic chuck:
Because of silver for the manufacture of ball screw, the length of the workpiece and does not make the workpiece surface damage, and adopts pneumatic chuck spindle SMW. This table is VTII-26/110YCV. The installation should pay attention to the relative position of a ring, the inflation process have leakage phenomenon does not make.
In addition there are many types of hydraulic chuck, generally have hollow and solid chuck, equally divided jaw, should also choose to use with the workpiece or processing or cost considerations, the following special hydraulic chuck examples of reference.
A. indexing chuck:
The main function of rotary indexing hydraulic chuck for turning a special workpiece (for example: a cross shaft, electromagnetic valve, etc.) by dividing head control the workpiece surface, can be omitted to produce a variety of special clamping jaw and reduce the loading and unloading time. (the chuck with special oil cylinder, oil tank. )
[] [] indexing chuck collet
B. collet:
Used for processing of spindle parts, usually with automatic feeding machine and filling system, with 24HR automatic production, high productivity and reduce labor costs. The collocation of the collet is usually divided into round, square, hexagonal is four.
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