DVS-Universal-GrindingMachineryUGrind DD DDV
DVS Universal Grinding GmbH

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New manufacturing technologies for new vehicle technologies
DVS UGRIND DD/DDV New manufacturing technologies for new vehicle technologies

No other product is currently as affected by technological change as the automobile and all of its components. Even brake discs are subject to new requirements that must be accommodated by production technology.

Minimizing particulate matter

A significant part of the particulate matter caused by automobiles is due to brake wear, be it from the brake pads or brake discs. Brake discs are produced more wear-resistant, and the friction surfaces are provided with special hard material coatings in order to minimize particulate matter pollution.

Corrosion prevention

While EVs are also fitted with disc brakes, they are rarely used. But their surfaces are exposed to the same weather conditions as those of conventional vehicle brakes. So rust can build up relatively quickly. This is prevented through special coatings that diffuse into the cast. Grinding is subsequently required.

Higher efficiency through lower mass

Brake discs made of carbon ceramic weigh only about 10% of the weight of a cast brake disc and still have better wear and braking characteristics. These types of brake discs can also be processed on the DVS UGrind DD/DDV.

Grinding cast brake discs

Grinding conventional cast brake discs offers a number of advantages over customary lathe machining. Due to the very low wear of the grinding wheels, the tool costs are much lower, while yielding much higher precision and up to 99% contact area on the friction surfaces.

Highlights
01

Machining of extremely hard coatings, such as tungsten carbide, aluminum oxide, chromium carbide

02

Low tool costs thanks to the long service life of DVS grinding wheels

03

Quick-change chucks for automated operation

04

Upstream automation and integration into complete production lines possible

05

Tight tolerances for axial run-out and parallelism as well as high contact area

06

Greater efficiency and precision when grinding cast brake discs compared to turning

UGrind 800 DD Technical specification

Workpiece diameter min./max. in mm:

250/420

Workpiece thickness max. in mm:

100

Workpiece weight max. in kg:

30

Workpiece spindle speed in rpm:

0–400

Travel distance X in mm:

490

Travel distance Z in mm:

790

Control:

Bosch Rexroth MTX standard CML 75.1

Optional accessories:

Custom automation solutions, external coolant preparation, chucks, adapted to the relevant brake disc type with bayonet quick-release lock

Technologies:

Double-sided surface grinding of brake discs: with hard material coating (e.g., tungsten carbide, chrome carbide, aluminum oxide, silicon carbide) made of carbon ceramic, with corrosion protection coating made of cast iron

Machine design/structure:

Sloped machine bed with two grinding spindles that can be moved in the Z-direction, multifunctional head with workpiece spindle, movable in Z- and X-direction, as well as a spindle with dressing or teeth grinder

Axes/drives:

Cross slide with X-axis (servo motor + KGT) and Z1-axis (linear motor), B-axis (multifunction head) with torque motor, Z2 and Z3-axes (servo motor + KGT), workpiece and tool spindles implemented as motor spindles