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NC feeder drum processing method
- Dec 28, 2018 -

Like the second-generation roller feeder, the NC feeder as the third-generation feeding device still uses the roller pinch feeding method. As the roller pinch feeding device, the quality of the roller and the processing quality will directly affect the accuracy of the feeding, the smoothness of the surface of the material and the service life of the machine.

Since the NC feeder feed roller is so important, how can it be processed to ensure its accuracy? In order to let customers better understand and understand the NC feeder,Fanty Machinery, which is the leading brand in the domestic feeder industry, explains in detail how the feeder roller has evolved from bearing steel to high-precision feeding roller. Due to the complicated machining process, the processing steps are explained step by step:

Thick plate NC feeder

1. It is preferred to select high-quality imported bearing steel (mostly domestic) with a diameter of Φ80mm (small machine type NC-200, NC-300, NC-400 upper drum is 65mm) as the raw material, and carry out the drawings provided by the technical department on the sawing machine. For sawing, the cutting size requires a machining allowance of 5 mm.

NC feeder drum processing

2. Quenching and heat treatment of the sawed imported bearing steel. The induction bearing furnace is used to heat the inlet bearing steel of the NC feeder to 500-650 °C for tempering. This quenching and tempering process can greatly improve the performance of the steel, and greatly improve its strength, plasticity and toughness. To make it have a good comprehensive processing performance.

3. Forming and processing the tempered bearing steel using CNC numerical control machine tools. The main processes of the forming process include: correction of the size (fixing the total length according to the process drawings), machining the center hole at both ends, roughing the shape (remaining machining allowance for radial dimensions), and two round bars End face.

NC feeder roller stock

4. The surface of the bearing steel is subjected to high-frequency quenching treatment using high-frequency quenching equipment. This process requires special attention only to require rapid heating, so that the surface of the bearing steel quickly reaches the quenching temperature, and immediately cools when the heat is too late to pass through the center of the bearing steel to achieve local quenching. This allows the machined NC feeder roller to maintain its original good toughness when achieving a high hardness, high wear resistance surface.

5. Rough surface grinding of the NC feeder roller. When the surface of the drum is rough-grinded, it is necessary to pay attention to the processing of the radial dimension to be smaller than the required size of the processing drawings, so that the position of the hard chrome plating is reserved.

NC feeder roller processing technology

6. The surface of the NC feeder roller is hard chrome plated. By plating the surface of the NC feeder roller with chrome plating (standard thickness of 0.15mm on one side), the characteristics of chromium can be used to improve the hardness, wear resistance, temperature resistance and corrosion resistance of the roller.

7. The final step of the processing is to finish the grinding of the NC feeder roller. All sizes must be controlled within the tolerances of the drawing during the finishing process, and the surface roughness should be controlled within the range of Ra 0.16-0.32 μm to ensure the runout between the bearing position and the concentricity of the drum.