News

The RPT machines from Roed­ers are not only visu­al­ly dif­fer­ent from their pre­de­ces­sors. The machines are also built with sig­nif­i­cant­ly improved tech­nolo­gies. As a result, pre­vi­ous­ly unthink­able tol­er­ances are now pos­si­ble for many appli­ca­tions. Com­pared to the very pre­cise RXP series Roed­ers again has made a quan­tum leap.

With the NANOTOL® tech­nol­o­gy, Roed­ers has raised the pre­ci­sion and run­ning behav­iour of the guide­ways in the lin­ear axes of the RPT machines to a new lev­el. The tol­er­ances in the run­ning behav­iour of the axis car­riages are so small that they no longer have any influ­ence on the machin­ing result because oth­er para­me­ters such as the run­ning con­cen­tric­i­ty of the tool etc. play a greater role. The dia­gram shows the sig­nif­i­cant dif­fer­ence between the pre­vi­ous and new guide­way tech­nol­o­gy with NANOTOL®.

Resid­ual errors in the straight­ness of the guide­ways and posi­tion­ing uncer­tain­ties of the opti­cal scale are mea­sured over the entire trav­el of the axis with the high-pre­ci­sion XM60 laser from Ren­ishaw and com­pen­sat­ed for by the NC con­trol sys­tem. In this way, excep­tion­al accu­ra­cy and straight­ness of the lin­ear axes are achieved.

Heat sources in the machine such as motors, main spin­dle, lin­ear guide­ways (option­al) and rotary axis bear­ings are also tem­pered with high pre­ci­sion. As a result, the zero point of the machine is with­in +/- 1 µm, even with tem­per­a­ture fluc­tu­a­tions in the work­shop of up to +/- 3°C.

The new RXU2000 from Roed­ers achieves max­i­mum pre­ci­sion when work­pieces and moulds with par­tic­u­lar­ly large dimen­sions have to be machined. Designed for excep­tion­al accu­ra­cy com­bined with high per­for­mance in machin­ing hard­ened mate­ri­als, the machine has a work­ing area of 2,000 x 1,800 x 800 mm. The work table is designed for loads of up to 5.0 t. The Z‑axis stroke has been inten­tion­al­ly lim­it­ed in order to ensure max­i­mum accuracy.

RCF 150 — lin­ear very com­pact machine automa­tion for one or sev­er­al machines placed in a row:

• Only 1.5 m wide includ­ing shelves
• Max. work­piece weight 150 kg
• Grip­per change for dif­fer­ent pal­let types and tools
• quick­ly installed due to mod­u­lar design
• easy to expand anytime

A 24 cav­i­ty injec­tion mould for lens­es for mobile phones had been jig ground on a RHP500 machine with high­est pre­ci­sion pos­si­ble. This appli­ca­tion became espe­cial­ly chal­leng­ing, because the holes had only 8 mm diam­e­ter, the area to be jig ground began 15 mm below the mould sur­face and reached a depth of 45 mm. In con­se­quence, the holes had to be ground cylin­dri­cal with high­est pre­ci­sion on a total length of 30 mm. The request­ed cylin­dric­i­ty of 0.5 µm was achieved on all 24 cavities.

Milling and Grinding

Cut­ting or grind­ing tools with up to 200 mm diam­e­ter may auto­mat­i­cal­ly be changed into the main spin­dle by a new­ly devel­oped tool chang­er, which is placed below the bridge of the machine. For each tool an adjust­ed cool­ing sup­ply is changed as well, which allows per­fect cool­ing where need­ed for the cut­ting process.

Machin­ing with a large grind­ing wheel with adjust­ed, like­wise auto­mat­i­cal­ly changed cool­ing sup­ply for the grind­ing process with large coolant volume

Roeders is partner of umati initiative

Roed­ers is part­ner of the umati ini­tia­tive of the Ger­man machine tool asso­ci­a­tion VDW (umati = uni­ver­sal machine tool interface).

Moulds for liquid silicone rubber (LSR)

Part­ing sur­faces of injec­tion moulds for liq­uid sil­i­cone rub­ber (LSR) are machined with high pre­ci­sion to final dimen­sions. No rework is nec­es­sary. The moulds are direct­ly used for flash-free production.

For min­i­miz­ing train­ing peri­ods and facil­i­tat­ing the change of oper­a­tors among machines with dif­fer­ent NC-Con­trols, Roed­ers machines may be pro­grammed in HEIDENHAIN®#-NC-Code (with lim­it­ed scope) or ISO-Code (G‑Code). The NC-Pro­gram is cre­at­ed with sim­ple macros at the con­trol. Oper­a­tors know­ing the NC-com­mands in the respec­tive code do not need extra training.

#Hei­den­hain is the reg­is­tered trade mark of the Dr. Johannes Hei­den­hain GmbH

Reflector, material ELMAX 58 HRC

Machin­ing results:

Pre­ci­sion +/- 1 µm

Sur­face qual­i­ty Ra 0.010 µm

The com­bi­na­tion of high pre­ci­sion air bear­ing spin­dles run­ning up to 90000 rpm with the lin­ear motor direct dri­ve tech­nol­o­gy of the Röders HSC machines allow for up to now unknown qual­i­ties in the watch indus­try. On the exhi­bi­tion EPHJ in Gene­va spe­cial­ists were con­vinced of the supe­ri­or qual­i­ty direct­ly at the machine. With the long-stand­ing com­pe­tence of Röders in automa­tion the machine may be adapt­ed to a high­ly effi­cient man­u­fac­tur­ing process at the customer.