Forged Steel Eccentric Shafts ( Transmission Sleeves , Precision Mechanical Fittings )

Shaft

Description

Eccentric Shafts Is a Forged Steel Shaft Parallel To And Not Coincident With The Axis Of The Outer Circle. The Eccentric Shaft Is Usually Fixed On The Rotating Shaft Of The Motor Through The Eccentric Hole. When The Motor Is Started, The Cam Moves. Therefore, It Is Widely Used In Automobiles, Engines, Pumps And So On.

Eccentric Mechanical Fittings Is The Cnc Machining Parts Whose Outer Circle And Outer Circle Are Parallel To And Not Coincident With The Axis Of The Inner Hole And Deviate From One Distance. The Distance Between The Two Parallel Axes Is Called Eccentricity. The Eccentric Part Of The Outer Circle And The Outer Circle Is Called The Eccentric Shaft Or The Eccentric Disk; The Eccentric Part Of The Outer Circle And The Inner Hole Is Called The Eccentric Sleeve.

Eccentric Shaft Function

In Mechanical Transmission, The Motion Of Rotary Shaft Is Changed Into Reciprocating Linear Motion Or Reciprocating Linear Motion Into Rotary Shaft Motion, Which Is Usually Accomplished By Using Eccentric Parts.

For Example, The Lubrication Pump Driven By Eccentric Fittings In Lathe Headbox, Crankshaft In Automobile Engine, Etc. In Order To Adjust The Center Distance Between The Shaft And The Shaft Conveniently,

Eccentric Shaft Is Usually Used In Triangular Belt Drive Of Planar Linkage Mechanism.

The General Shaft Can Only Drive The Work Piece To Rotate.

But The Eccentric Shaft Can Transfer Not Only Rotation, But Also Revolution.

Eccentric Shaft Structure And Working Principle

The Eccentric Shaft Becomes An Eccentric Wheel When The Circle Does Not Rotate Around Its Center.

The Eccentric Shaft Is Also a Kind Of Cam Shaft.

Generally Speaking, The Main Purpose Of The Eccentric Wheel Is To Produce Vibration. For Example, The Electric Screen, The Vibrator Inside The Mobile Phone Is Using The Eccentric Wheel. Most Of The Eccentric Wheel Are Circular Wheel, Because The Manufacturing Of The Circular Wheel Is Convenient And The Process Is Simple.

Principle Of Machining Eccentric Shaft

Eccentric Shaft And Eccentric Sleeve Are Usually Machined On Lathe. Their Processing Principle Is Basically The Same; Mainly In Clamping, Measures Are Taken To Align The Axis Of The Eccentric Part To Coincide With The Rotation Shaft Of The Lathe Spindle.

There Are Five General Methods For Eccentric Parts.

Eccentric Parts Is Turned On Three-Jaw Chuck.

Eccentric Parts Is Turned On Four-Jaw Chuck.

Eccentric Parts Between Two Pins.

The Eccentric Parts Is Turned On The Eccentric Chuck.

Eccentric Parts Is Turned On Special Fixture.

Machining Of Eccentric Shaft

The Processing Of Eccentric Parts Is a Difficult Point In Mechanical Processing. For Eccentric Bearings, Cams And Other Large Eccentric Parts Processing. At Present, Three-Jaw Chuck And Four-Jaw Chuck Are Commonly Used To Process On Ordinary Machine Tools.

With The Continuous Development Of Science And Technology, The Demand For Bigger Core Parts Is Increasing, And The Precision Is Getting Higher And Higher. Therefore, The Demand For This Kind Of Eccentric Fixture Is Increasing Correspondingly, And Its Application Prospect Is Broad.

Eccentric Shaft Parts Are One Of The Typical Parts.

According To The Different Structural Forms Of Shaft Parts, It Can Be Generally Divided Into Eccentric Optical Shaft , Eccentric Stepped Shaft And Special-Shaped Eccentric Shaft, Or Into Solid Eccentric Shaft, Hollow Eccentric Shaft, Etc.

They Are Also Used In Machines To Support Transmission Parts Such As Gears And Pulleys To Transmit Torque Or Motion.

Main Processing Method Of Eccentric Shaft

The Eccentric Shaft Of The Lathe Mainly Takes Measures In Clamping, And Aligns The Shaft Of The Eccentric Part To Be Machined To Coincide With The Shaft Of The Lathe Spindle.

1, Turning Eccentric ShaftOn Four-Jaw Single-Action Chuck. Eccentric Parts With Small Quantity And Low Precision Are Usually Clamped With Four-Jaw Chucks. When Turning Eccentric Parts On Four-Jaw Chuck, The Parts Should Be Scribed First. It Is To Draw An Eccentric Circle And a Cross Line In Both Horizontal And Vertical Directions. In Order To Determine Its Position In The Four-Jaw Chuck According To These Lines.

2, When Processing Eccentric FittingWith Small Eccentricity (e < 5-6mm) And Large Number Of Eccentric Fitting, The Three-Claw Self-Centering Chuck Can Be Processed. When Turning, The Outer Circle And Length Can Be Turned Well.

Then It Is Clamped On The Three-Jaw Chuck, And a Gasket Is Padded On One Of The Claws To Make The Fitting Eccentric For Turning. The Thickness Of The Pad Can Be Calculated By The Following Formula. x = 1.5e * (1-e/2d) (x = Gasket Thickness; e = Eccentricity Of Fitting; d = Diameter Of Clamping Part Of Three Claws) In Actual Turning, Because Of The Deviation Of Contact Position Between Long Claws And Fitting, The Deformation Of Clamped Soil Gasket Needs To Add a Correction Constant.

x Real = x + 1.5 Delta e (x Real = Actual Gasket Thickness; x = Calculated Thickness; Delta e = Measured Eccentricity Error After Trial Out)

3, Turning Eccentric Workpiece On Double Chuck. This Method Is To Fix Three-Claw Self-Centering Chuck On Four-Claw Single-Action Chuck And Then Move One Eccentric Distance To Clamp. Later, Only Clamping Workpiece On Three-Claw Self-Centering Chuck Can Turn Eccentric Workpiece. This Eliminates The Need To Correct The Workpiece.

When Moving The Position Of The Three-Jaw Chuck, The Optical Axis Is Clamped In The Three-Jaw Self-Centering Chuck, And The Eccentricity Is Determined By The Percentile Meter. Finally, The Position Of The Three-Jaw Chuck In The Four-Jaw Chuck Is Determined.

4, The Eccentric Workpiece With Longer Eccentric Workpiece Between Two Pins Can Be Clamped Between Two Pins For Turning, And The Workpiece Can Be Driven To Rotate By a Chicken Core Clamp. The Eccentric Center Holes Are Usually Machined On a Boring Machine Because It Is Difficult To Ensure The Centrality Of The Two Ends, And The Direction Of The Eccentric Center Holes Is Uniform And Parallel.

5, Eccentricity Adjustment Of Eccentric Chuck Of Eccentric Parts On Eccentric Chuck Is Convenient. It Has Strong Versatility And High Precision. It Is An Ideal Eccentric Tool For Vehicle.

6, In Special Fixture, Turning Eccentric Workpiece Can Be Done On Special Fixture When The Processing Length Is Short, The Precision Is High And The Number Of Eccentric Workpiece Is Very Large.

7, In Actual Processing Of Eccentric Workpiece With Large Eccentricity And Low Precision Requirement, Another Clamping Method Is Summarized. Three-Claw Boring And Gasket Clamping Are Used. When Three-Claw Self-Centering Upper Claw Is Used, The First Claw Is First Applied, And Then The Clamp Is Moved Lightly, So That The End Face Screw Of The Clamp Rotates About One Or Two Circles, And Then The Second And Third Claws Are Added, So That The Three Claws Of The Clamp Are Natural. Form Eccentricity.

Because This Eccentricity Is Not Adjustable, Gaskets Should Be Added To Adjust It. The Advantage Of This Method Is Simple, Convenient And Fast, But The Disadvantage Is That The Positioning Accuracy Is Not High.

Machining Technology Of Eccentric Shaft

In The Process Planning And Fixture Design Of Eccentric Shaft, According To The Batch Production And Actual Production Situation, The Method Of Combining Process Centralization And Process Decentralization Is Adopted In The Process Arrangement, And An Automatic Production Line Is Designed. When The Process Is Organized According To The Principle Of Process Centralization, Highly Automated And Efficient Machine Tools And Process Equipment Are Widely Used. This Greatly Improves Productivity.