Scarifier cutter is some sort of conservation for the removal of pavement materials, machinery, high-speed rotation of the milling cutter drum and filled up with milling method using inverse removed asphalt, cement concrete pavement. Because of the complexness of material composition, high hardness, wear a sharp knife makes the most rapid consumption of wearing parts, greatly increasing layout costs. Therefore, the strengthening of the tools of research and rational regarding important economic significance.
Tool Structure and Process
Tool typical structure shown in Figure 1, mainly Cutter, knife holder and base make up. Connection as follows: base soldered directly for the milling drum, the knife block your screw fastening the bottom of the slot, while the cutter head knife inserted through the spring seat up. Segment from the tip, knife handles, gaskets, and spring up composition (Figure 2).
Cutting because of the completion of major tasks, tip materials, large particles of tungsten carbide alloy used the particular soft cobalt metal will link it together and also the hardness reached 1400HV above it at high temperature, high-impact cases, also is known for its more good flexural and abrasion prevention. And cone-shaped tip, top diameter is small, cut into the ground to be certain the cone into the performance, reduced cutting resistance; tip end of it of large diameter, providing protection against knife handle. Corner by special brazing copper connected into the shank, by way of strength, can withstand the exerted regarding the knife's edge with the knife handle 45 degrees to the direction of 6 a lot of force generated by tripled.
Shank rrncludes a different lower and upper part of the mechanical properties, the upper half an issue friction between road and milling wastes, which require high hardness, lower half of the rod into a knife block, the needs to be able to absorb the impact of milling process, So, good staying power. This shank would need encounter dual properties: wear and bending. Retract the middle there can be a slot, regular use a knife clamp unloading over cutter head pulled out a knife block (some Blade wouldn't back a knife slots, use the Cutter punch out from it from the rear). Innovative Cutter, Shank head cloth also has grooves to increase friction at a time ground in rotation performance, to prevent partial wear.
Gasket is constructed of high-quality spring steel, shape similar to the disc spring, showing inverted cone. Its usefulness is twofold: First, reduce the damage and tear of a knife quit. Segment work rotating seat expand directly that come with the knife, knife block is bound to cause serious wear and tear, but the knife is a lot higher towards the price of Block Cutter, so to a gasket in between, so that rotation Segment only whilst friction pads to protect the knife block; Second, the cone-shaped seat with the gasket and knife cone positioning accuracy with the surface to ensure that the work of Segment as knife block in a first rate right in the state, reducing knife block Kong wear out.
Spring up from the 1.2 mm high-quality spring steel created into a knife block knife block hole after strong tension, and the milling process does not block the prolapse off the knife. Milling process needs to be able Segment rotation, it springs up with the knife handle large radial clearance between.
Old-fashioned milling machine is required in welding a knife block, its not easy to replace, have right now been using quick-change-type knife block, with set screws within the fixed base. Screw open screws can easily remove the knife area. Knife block installation area, effectively protecting the bottom and reduce stress. Open two instances the top ring groove, as the wear-lines with regard to maintenance.
Base soldered directly to milling drum, in addition to install additional tools, there is a very natural part - screw conveying. Large base the actual milling drum spiral arrangement, forming a Road 'spiral blade.' After milling the waste is to rely on rotating 'spiral blade' are usually pushed in the milling chamber in the middle, and subsequently thrown from the plate throwing material. Therefore, the base shape and layout of a direct effect on milling drum stacker, and also expected income effect, require special vision.