Technology Grinding

Spindel - Schleiftechnologie

Technology for Grinding, especially Jig Grinding

Röders RPT Dynamik Schleifprozess, Dynamic Grinding Process
Röders GmbH Gear Machining Grinding 02

Com­bin­ing milling and grind­ing, espe­cial­ly jig grind­ing in a sin­gle set-up can lead to a sig­nif­i­cant increase in effi­cien­cy in many appli­ca­tions. Rough­ing is car­ried out by milling, whilst high pre­ci­sion some­times in sub-microme­tre range is achieved through grind­ing, most­ly jig grind­ing. Milled 3D con­tours fit per­fect­ly with ground areas, etc. All machines except the RXP400 can be ful­ly equipped for grinding.

There are two strate­gies avail­able for grind­ing: fast stroke chop grind­ing, famil­iar from jig grind­ing machines, and slow stroke chop grind­ing with a high­er feed rate and mul­ti­ple pass­es, which puts less dynam­ic stress on the machine struc­ture and there­fore results in even high­er accu­ra­cies. Flush­ing oil lubri­ca­tion is the pre­ferred lubri­ca­tion, with the oil pre­cise­ly tem­per­a­ture-con­trolled. Sur­face fin­ish­es are in the nanome­tre range, well below 0.01 µm.

Verlässliche Präzision

Where high­est pre­ci­sion require­ments in sub-microme­tre range apply, the work­piece first­ly is fin­ished-ground with a small allowance, then the dimen­sions achieved are mea­sured using the 3D touch probe, the final infeed is auto­mat­i­cal­ly cal­cu­lat­ed by the RMS6 con­trol sys­tem, and final­ly the work­piece is fin­ished-ground to the exact final dimen­sions. No oper­a­tor inter­ven­tion is required. This approach has proved par­tic­u­lar­ly effec­tive in jig grind­ing appli­ca­tions, but can also be used for machin­ing tasks involv­ing larg­er grind­ing tools.

Röders GmbH Screen Simulation Grinding Cycle Programming
Röders GmbH Screen Simulation Conegrinding

The RMS6 con­trol dif­fers sig­nif­i­cant­ly from oth­er NC-con­trols in that it offers a very straight­for­ward way for the pro­gram­ming of grind­ing oper­a­tions direct­ly at the con­trol, as well as a com­pre­hen­sive range of grind­ing cycles. In addi­tion, geome­tries designed exter­nal­ly can be import­ed direct­ly into the RMS6 con­trol. 3- or 5‑axis machin­ing of con­i­cal work­pieces, includ­ing the nec­es­sary dress­ing of the grind­ing wheels, can also be pro­grammed quickly.

Röders GmbH Abrichten des Schleifstiftes - dressing up spindle

Var­i­ous cycles are avail­able for the dress­ing of the grind­ing wheels. By car­ry­ing out a pre­lim­i­nary mea­sure­ment using the mea­sur­ing laser, the time need­ed to con­tact the dress­ing wheel with the grind­ing wheel can be reduced significantly.

Körperschallvermessung des Schleifstiftes

The sound detec­tion-based mea­sure­ment is used for

  • pre­cise­ly mea­sur­ing the grind­ing wheel on dia­mond surfaces
  • detect­ing the sur­face of the workpiece 
  • mon­i­tor­ing and opti­miz­ing the grind­ing process
  • mon­i­tor­ing the dress­ing process
Vergleichsgrafik Körperschallsignal

Using a pro­pri­etary devel­op­ment, Roed­ers has sig­nif­i­cant­ly improved the analy­sis of the sound sig­nal, there­by sub­stan­tial­ly increas­ing pre­ci­sion and reli­a­bil­i­ty. The visu­al­iza­tion and para­me­ter­i­za­tion of the sig­nals are ful­ly inte­grat­ed into the RMS6 control.

Funk-Körperschallmessung – Wireless sound detection sensor

Thanks to a high­ly com­pact, wire­less sound detec­tion sen­sor – the result of many years of devel­op­ment – it is pos­si­ble to car­ry out sound detec­tion-based mea­sure­ments on 5‑axis machines with out­stand­ing sig­nal qual­i­ty and with­out the need for inter­fer­ing cables. The results are in the sub-microme­tre range. The sen­sor is acti­vat­ed auto­mat­i­cal­ly and switch­es to pow­er-sav­ing mode once machin­ing is ter­mi­nat­ed com­plete. This makes it ide­al for use in auto­mat­ed machines.

XXL Toolchanger

Large grind­ing wheels can be changed into the spin­dle auto­mat­i­cal­ly from an extra tool chang­er for large diam­e­ter tools.

Vibrocut

For machin­ing brit­tle-hard mate­ri­als such as glass or ceram­ics, a sys­tem for axi­al ultra­son­ic exci­ta­tion of the tool is avail­able, which may be ful­ly inte­grat­ed into the machine. The ultra­son­ic exci­ta­tion takes place direct­ly at the tool hold­er, so that the spin­dle is not affect­ed by the exci­ta­tion and is still avail­able for machin­ing with­out ultra­sound. Ultra­sound can sig­nif­i­cant­ly reduce the machin­ing forces and thus in some appli­ca­tions the sur­face dam­age to the work­piece caused by machin­ing. In some cas­es, high­er machin­ing feeds and removal rates are possible.

Schleiföl und Löschtechnik – Grinding oil and extinguishing equipment

The best grind­ing results are achieved using fine-fil­tered, pre­cise­ly tem­per­a­ture-con­trolled grind­ing oil. A CO₂ extin­guish­ing sys­tem is avail­able, or, par­tic­u­lar­ly for work­shops with lim­it­ed space, an aerosol-based extin­guish­ing system.