The desired surface quality is produced using the procedures of belt polishing and Superfinishing. It is a fine form of mechanical processing to improve the roughness and to produce the specified bearing ratio. The surface quality can result in outcomes up to a mirror finish. Dimensional requirements for a component, however, are implemented by precision grinding.
Belt Polishing
Belt polishing or industrial polishing is one of the machining procedures. The choice of grit determines the peak-to-valley height.
As a processing step before chrome plating, polishing is suitable to mechanically remove heavily scaled residues on the component. As standard, the workpieces are polished after chrome plating in order to achieve the desired surface quality. Teflon coating is a variant of the post treatment. The micro-cracked chrome surface is sealed with a Teflon coating. Teflon coating can temporarily increase the corrosion resistance.
- Maximum dimensions: Ø 850 x 3600 mm
- Maximum weight: max. 2000 kg
- Roughness: Rz 1.6 - 2.5
- Between peaks
Superfinishing
Superfinishing (microfinish) optimizes the surface structure in the micro range. The Superfinishing process increases the bearing ratio and thus the compacting area. In order to achieve the desired contact area (bearing ratio in %), only roughness peaks are removed. This results in an improvement in the tip height and micro-geometry of the component.
In contrast to polishing, the Superfinishing creates the cross-hatch that is common in honing. The cross-shaped indentations optimize the lubricant distribution and thus the emergency running properties as well as the tribological properties of the component. The tribological advantages reduce the friction and the energy consumption of the workpiece in use.
Our process creates a uniform, seamless finish over the entire surface. The desired micrograph is created using the tool oscillation and rotation speed of the component to be machined. In order to be able to implement the specified bearing ratio, the prefabricated roughness values must be correct. This is where our many years of experience in mechanical processing and especially in dealing with hard chrome surfaces come into play. Superfinishing can also be used before the hard chrome plating to improve the surface quality of rotation-symmetric components.
- Maximum dimensions: Ø 850 x 4000 mm
- Maximum weight: max. 3000 kg
- Roughness: Rmax < 0.1, Ra < 0.01, Rz < 0.1
- Bearing ratio Rpk, Rvk, Rmr depending on requirements
- Between peaks
Mirror finish
With the Superfinishing procedure, a surface quality up to a mirror finish can be created. Very fine Finish tapes (up to 3 µm) are used for this purpose.
Mirror finish is required if the use of the component requires an absolutely homogeneous, clean and smooth surface. This is the case, for example, in the printing and foil industry.
- Maximum dimensions: Ø 480 x 3000 mm
- Maximum weight: max. 2000 kg
- Roughness: Rmax < 0.1, Ra < 0.01, Rz < 0.1
- Between peaks
Express Service
For orders with increased time pressure, you have the option of using our express service. The express service is coordinated directly with our production control and invoiced via a surcharge.
Initial Sampling
Before the start of more complex series, we offer you an initial sampling at special conditions. This allows you to convince yourself of the quality of our services. In addition, together we coordinate our production processes ideally.
Tips for the delivery
The delivery condition of the components is one of the decisive factors for optimum quality and a short throughput time. Here you will find helpful tips for the delivery of your components.
Betz-Chrom – your partner for strong parts
In the sense of a trustful partnership, you will receive highly qualified technical advice from us that is tailored to your needs. We combine 70 years of experience in surface technology with an innovative and inquisitive corporate culture. Our quality awareness, our occupational health and safety management as well as our measures for environmental protection and energy saving are audited and certified according to DIN standards. As an on-schedule partner with high quality level, we constantly aim to find the optimal process solution for you.
