COFA-X | Deburring 1:1 crossbores | HEULE

Range

Each COFA-X tool is designed for the individual application. It is a solution for deburring the edges created by intersecting bores (crossbores) having a main bore to cross bore ratio of 1:1. It can also be used for intersecting bores with offset axes. The COFA-X starts from a bore diameter of 5.0 mm.

For each application, we require a precise application description in order to provide the correct solution. Please define the parameters and characteristics of the application as precisely as possible.

Main bore diameter including tolerance
Cross bore diameter including tolerance
Bore depth
Workpiece material
Penetration angle
Eccentricity
Production volume per year
Cycle time (actual / target)
Type of machine
Current solution
Special requirements for solution
STEP drawing (3D)

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Construction

The tool concept is simple and is based on the COFA system. However, the blade is pre-tensioned so that it can follow the large bore unevenness. The tool body is also optional. This release is required for the COFA-X to move off-centre into the bore, as the blade cannot fold in due to the pretension in one direction.

The coated carbide blades are designed either exclusively for forward machining or exclusively for machining the back of the workpiece.

Two screws secure the replaceable spring to the tool body. After processing, this spring returns the blade to its starting position.

Tool Concept

Blade
Roll pin
Bending spring
Tool body
Cylinder screws
Threaded pin

COFA-X | Spring and Blade Change

Process steps description

The COFA-X removes burrs from the very uneven edges caused by intersecting internal bores. This mechanical deburring solution for crossbores can be used in CNC operations and significantly improves process reliability.

In use, for example when deburring the back bore edge, the deburring tool is moved off-centre (with spindle stopped) to the bore centre axis to allow entry of the tool into the bore. It is moved back to offset value 0 for deburring. The deburring process then occurs in reverse working feed. The edges of the bore are machined without producing secondary burrs. At the end of the crossbore deburring process, the blade retracts into the tool body and the tool rapidly traverses out of the bore. This is done without having to stop the spindle.

Downloads

Would you like additional information regarding the X-BORES family and COFA-X technology? Click through our downloads.

COFA-X | Catalogue

pdf ・ 631,0 KB

COFA-X | Spring and Blade Change

pdf ・ 276,5 KB

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How do you deburr “intersecting bores”?

Find out how in our 20-minute Online Seminar "Deburring CROSSBORES". Just click on the link and take a look.

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Crankshaft | Replacing manual processing with an automated process.

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Manifold | Replacing costly thermal deburring with mechanical deburring.

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