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Indexing Tables with a 3 piece Hirth Coupling Gear

NON-LIFTING TABLE TOP WITH A HIGH PRECISION 3-PIECE HIRTH COUPLING GEAR EXTREMELY ACCURATE WITH POSITIVE MECHANICAL LOCKING FOR HEAVY MACHINING

 

  • Wide range of styles and sizes

  • Robust and wear-resistant design

  • High indexing accuracy and

  • repeatability values

  • Resistance to high machining forces

  • Simple installation with reliable operation

  • Low maintenance design

The HC series of automatic indexing tables can be used with the table top in either the horizontal or vertical plane and are suitable for use on Machining Centers, Rotary transfer machines and most any other style of production machines and in manufacturing systems.

 

Rotation is by a worm and wheel driven via a servo motor, hydraulic clamping through the 3 piece coupling generates a resistance to high machining forces, add for the ultimate in positioning accuracy and rigidity.

 

Non-lifting, 3 piece coupling design has a reinforcing holding force and permits a table top that does not raise and lower during indexing.

 

A solid sealing system prohibits swarf, chips or cutting fluids from entering into housing, this creates reliability and longevity. 

Function Principles of Non-Lifting Indexing Tables

There are 3 gear rings to each Hirth Coupling


Gear ring A is attached to the rotating table top plate


Gear ring B is the "datum" attached to the table housing


Gear ring C raises and lowers inside the table housing to connect gear ring A and gear ring B together after each cycle.
 


Please refer to drawing 2 
 

  • Gear ring C is shown lowered to release the locked assembly
     

  • Gear ring A is now free to rotate with the table top
     

  • After the rotation is complete, Gear A is now in the new location
     

  • Gear ring C then raises to create a re-locked assembly as illustrated in drawing 1

 


Note: The raising and lowering of the gear rings is similar to a lapping effect.The accuracy of the gear teeth improves over time.

Application Examples

A CNC transfer machine of today is likely to be a flexible CNC machine. It is especially suitable where different types of work pieces must be produced in quantities.

 

The machine is especially useful for industries such as automotive, watches, livelihood necessities, and climate control systems.

 

CT series indexing tables are widely used in transfer machines either as horizontal or vertical axis.

 

Fast rotation time and high indexing accuracy ensures outstanding productivity be produced in medium to high quantities.

HC series - CNC Vertical / Horizontal Indexing Table, Hirth Gear - Hydraulic clamping

NCT tables are designed with axial - radial bearings to provide excellent load and thrust capabilites.

 

The hydraulic clamp produces a massive holding power and the housings withstand any twisting or flexing.

 

The large center bore series provides for added flexibility when adding work holding devices.

 

●Suitable for Vertical and Horizontal mounting

HC-H series - CNC Horizontal Indexing Table, Hirth Gear - Hydraulic clamping

HC-H series Indexing Tables are rotated by a dual lead worm gear driven via a servo motor.

 

Equipped with a 3 piece Hirth coupling, these tables achieve a superior positioning accuracy and the hydraulic clamping system provides the ultimate rigidity.


High density housings resist flexing under load and can accommodate high machining forces.

HC-HB series - Heavy Duty, CNC Horizontal Indexing Tables with
                         Hirth Gear - Hydraulic Clamping

HC-HB is suitable for horizontal machining center and boring / milling machine.

 

Equipped with three piece hirth coupling gear to achieve super positioning accuracy.


Particularly suitable for 180 degree double end boring.Table sizes from 1000mm to 2500mm or manufactured according to customer’s requirement, loading capacity up to 20,000kgs (on request).

CT series - Horizontal, Hydraulic Non-Lifting Indexing Tables
                   with Hirth Coupling Gear

The CT series of Indexing Tables are designed with a 3 piece Hirth coupling for high accuracy and repeatability without accumulative error.

 

Table indexing is via a hydraulic rack & pinion which provides high speed repetitive positioning with a smooth motion, the hydraulic clamping system ensures optimal clamping to withstand heavy cutting forces.

 

The tables are offered with alternate Hirth coupling in-order to meet various indexing requirements to suit applications.

CT-V series - Vertical, Hydraulic Non-Lifting Indexing Tables
                       with Hirth Coupling Gear

The CT-V series of Indexing Tables are designed with a 3 piece Hirth coupling for high accuracy and repeatability without accumulative error.

 

Table indexing is via a hydraulic rack & pinion which provides high speed repetitive positioning with a smooth motion, the hydraulic clamp system ensures optimal clamping to withstand heavy cutting forces.

 

The tables are offered with alternate Hirth couplings in-order to meet various index spacing to suit the application.

CT-WS series - CNC Non-Lifting Vertical / Horizontal Indexing Tables, 
                         Built-in style - Hydraulic clamping with Hirth Gear

CT-WS Indexing Tables are rotated by a dual lead worm gear driven via a servo motor which provides rapid bi-directional indexing.

 

An integrated hydraulically clamped 3 piece Hirth coupling ensures high accuracy and repetitive positioning, plus rigidity for heavy duty machining applications.

 

The tables are offered with alternate Hirth couplings in-order to meet various index spacing to suit the application requirements.

MBT /    Manual, Horizontal Indexing Tables with Hirth Gear

MBT series tables are designed with a 2 piece Hirth coupling for manually rotating in multiples of either 1° or 5° increments to an accuracy of +/- 2 seconds of arc.

 

The tables are clamped pneumatically or hydraulically depending upon model, by a simple actuation lever or hand-held pendant.

 

A vernier scale and pointer offers a reference during rotation, however, a digital scale is available on the larger tables (on reguest)

 

These heavy duty, but simple and self contained tables are ideal for Jobs Shops or for applications where the indexing table needs to be frequently removed and re-installed to accommodate machine tool utility.

© 2016 Indexing Technologies Inc.