WEMA News from Olbernhau

A steadily increasing demand for larger and more modern fully automated lathes with a turned part diameter of up to 85 mm made it clear that we needed to develop a machine of this type. While designing the WEMA MAXIMAT NC 85 plus NC, one of the main requirements was the use of advanced electro-mechanical drives together with the latest control technology.
When integrating modern technology, a major advantages is that all processing parameters can be easily adjusted on the machine control panel without having to access the work area. The protective guards remain closed and the machine can continue running.
All parameters such as:
Rapid motion speed
Rapid motion traverse path
Processing speed (speeds can also be changed over the entire traverse path)
Traverse path distances
Switch off and change over positions
are therefore adjusted to the work piece within seconds without affecting work safety.
During the new development, further improvements were made to existing technological processes, such as increased processing speeds, better finished part quality and reduced tool costs. The use of NC technology makes it possible, for example, to pre-turn the work piece to a suitable form using the lunette system when feeding the timber into the system. Standard cutters are used here.
This makes it possible to considerably shorten the cycle times for a turned part because the entire pre-turning step is omitted. The contour of the turned part is created using a CAD program and entered in the machine's control system. This makes design changes possible in a very short period of time. Costly pre-turning cutters are not needed. Many different turned part designs can be produced without expensive form cutters, so finishing cutters are also not needed. This is especially beneficial for small lot sizes.
The design of the drilling unit is also totally new. A two-stage processing unit, i.e. a tool changing unit with two separate drilling sleeves, was developed for axial and front side processing. One sleeve is used as previously for simple drilling tasks. The second sleeve is controlled by a two-axis NC control unit. Thus, it is now possible to create contours in a drill hole using recess cutting. This unit can also be used for front-side processing.
The machine control system allows freely programmable settings to be made on the control panel for all tool supports. This allows optimal processing that is adapted to the specific work piece to be carried and much shorter processing times to be achieved, which results in a less expensive turned part.
Technical data:
Turning diameter: 20 mm - 85 mm
Maximum turning length: 200 mm using profile cutter
Maximum drilling depth: 100 mm
120 mm by special order
Drill chuck shaft: Ø 35 mm
Length of timber blank: 450 mm - 1000 mm
Tool holder: dovetailed tool clamp
Spindle rotation speeds: 880 rpm - 3500 rpm
Drive motor: 5,5 kW
Electrics: 400 V / 230 V, 3/PE/N, 50 Hz
Total electrical requirements: 6,5 kW max
Electric equipment: security electric equipment under VDE motor contact
Protective motor: protection class IP 54
Suction outlets: 3 x 100 mm
Compressed air: 6 bar
Measures: L 3200 mm / B 1600 mm / H 1800 mm
Weight: approx. 2100 kg
Technical alteration reserved.

WEMA MINIMAT 65 NC is a further development of our approved
Automatic Small Components Lathe WEMA MINIMAT 65.
The drive of both swivel heads is equipped with electric servo axis and ball circulation guidance.
Existing MINIMAT 65 machines can be modified to the new system MINIMAT 65 NC.
To work with 2 form tools is still possible and you also can do various chippings as usual.
No more setting up of limit switches.
Positions and speed will be set up in the programme.
To each stroke work, you can put in several positions and speeds.

2. Innovation
By use of 2-axis NC control you can mount a profile cutter on the front support.
This profile cutter together with the feed can do a free definable contour.
The contour will be made on a separate PC by Mega Cad and put into the machine. The lathe can code profile and schedule programs.
The advantage when working so is:
You save costs for tooling, because you do not need a formtool for rough turning.
You use only 1 profile cutter for different profiles.
You do the final turning with the form tool and reach highest quality of the turned parts.
The profile cutter works directly behind the steady, therefore you reach
Better solidity when working with long turned parts.
Quicker working process at rough turning.
Saved programs can be called up quickly.

3. Innovation
You can work with a profile cutter instead of working with a form tool,
Or you work only partial with a form tool.
A profile cutter is cheaper than a form tool.
Quick modification of the contour by changing of drawing on PC
Best results by producing small series, where a form tool would be
too expensive.
Excellent quality reached.
Working with longer turning parts possible.

The fully automatic copying lathe with state of the art technology. All axes run on hardened and ground law-maintenance ball transfer guides. The CONQUEST can be delivered in 3 or 4 axis design.
Functions of the CONQUEST
CNC Fully-automatic Copying Lathe
>> please read more

The “CONQUEST” can be supplied as a 3 or 4 axis machine. All axis are produced with hardened and ground linear guides.
Functions of the “CONQUEST”:
Turning, sanding, routing, grooving, engraving, drilling
Further details:
CNC controlled steady, hopper feed, laser-scan for copying existing profiles, 3kw router infinitely variable speed 6000-18000 rpm, tiltable, turnable and height adjustable, collets to 16 mm.
CNC controlled copying steel swivel function.
CNC controlled sanding unit which can be used for flat or pointed profiles on turned articles.

<< Download Data sheets >>

WEMA CONQUEST with 5 axis

• 2 opposed cutters for greater stock removal
• High speed production or single part turning
• Programmable sanding unit
• (Patent) Laser scanning of original sample
• (Patent) Large capacity self cantering magazine

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