Milling and machining at Rime
- Milling of holes up to a diameter of 32 mm
- Production of standard chamfers with the angle inclinations of 30°, 45° or 60°
- Stepwise milling of chamfers with individual angle inclinations
- Milling with a roughness up to 1.6 microns
- Production of threads
- Working area: 1,800 x 920 x 750 mm
- Very high cutting capacity
- Great depth of the worktable
- Working area: 4,200 / 3,630 x 750 x 500 mm
- Rotary table with a diameter of 750 mm
- Interference area of 1,100 mm
Various tools for milling are available in a changing magazine, which can be automatically exchanged if necessary. This enables rapid machining without long changeover times. With these tools, bearing seats, chamfers, precise fittings, pockets and high-precision threads can be produced.
Milling metal sheets
Various tools are available for milling in a changer magazine, which can be exchanged automatically if necessary. This enables speedy machining without lengthy retooling times. With these tools we can make bearing seats, chamfers, fits, cutouts and openings and high-precision threads. The milling is carried out by tools that are fitted with indexable inserts. These inserts are made of extremely resistant steels, which have far higher hardnesses than the workpieces to be machined. The indexable inserts remove material from the surface of the sheet metal part by fast rotation. The required shaped element is therefore produced chip for chip. For this reason, this process is also called chip removal.
Our sister company Tosec offers even larger 3D milled parts up to 7,000 x 1,200 x 1,300 mm. 5-axis machining is possible up to a size of 1,250 mm.
Holes are often made by us by Laser cutting. However, there is a rule of thumb that states that the diameter must be at least equal to the material thickness. In exceptional cases and very good material quality, the actual radius can be slightly smaller than this radius. The large amount of heat produced by the laser beam causes scaling on the underside of the metal sheet if the radii are too small. Time-consuming rework is then necessary to remove the scale. The material driven out to make the hole can also deposit on the edge of the hole.
If the material is highly reflective, the laser cannot cut through the material and is reflected back instead. In this case holes have to be drilled. This can be done up to a diameter of 32 mm. Larger holes are then made by milling.
How does chamfer milling work?
One method of making Chamfers is milling. Virtually any chamfer angle can be made by rotating the milling head without causing knurling to occur at the workpiece edges. This is especially interesting for workpieces that are not welded.
With our machining centre we can mill chamfers with all angles. We have suitable tools for several standard angles, which reduces the machining time considerably. Other chamfers are also no problem. They are milled gradually.
In the case of stepped chamfers, choosing the correct milling head is decisive for quality. It is necessary to consider for what the chamfer is needed and what degree of position is required. If it is only the angle that is important and the surface is secondary, the steps can be made somewhat wider.
This saves machining time. In the case of chamfers that need both a precise angle and an absolutely smooth surface, the stepping can be made so fine that no machining pattern remains.
How are fits (clearances) milled?
Fits can be made using different production methods, depending on their requirements. When choosing the production method the tolerable clearance between the hole and shaft is decisive. If fits are required in the agricultural sector, a larger clearance or allowance is possible as for fits in vehicle and engine construction. Very precise fits can be made by drilling, which have a roughness depth (peak to valley height) of 16 to 250 micrometres.
Milling is a far more precise production process and can achieve roughness depths of up to 1.6 micrometres. With our milling we can make very high-quality fits, which satisfy the highest standards.
Can welds be prepared by milling?
In classic weld preparation we mill a chamfer at the material edges. The milling produces very clean surfaces, which can then be welded together extremely well.
The chamfered angle helps the welder to join the assemblies. Variable chamfer angles and surface sizes can be produced depending on the customer’s wishes.
Milling chamfers is a relatively expensive method of weld preparation. In order to keep the unit price low, we use a preparation machine especially purchased for this task.
How are threads milled?
With our machining centre we can make high-precision Threads in components. One advantage is that different size threads can be made with the same tool. As the milling takes place with little pressure, threads can also be made in thinner workpieces.
We can basically mill threads of all sizes. Our technicians will be pleased to advise you on which maximum thread sizes are possible in relation to the workpiece size and still have a high mechanical load capacity.