The chip breaking method commonly used in the existing automatic line cutters is useful for chip breaking and chip breaking, breaking chips with additional chip breaking device, pre-forming grooves on the workpiece to break the chips, breaking the chips with the chip breaker, and changing the physical and mechanical properties of the workpiece material. Broken chip, cutting chip breaking by vibration, etc.
Automatic line cutters use indexable inserts, which use the chipbreaker to break the chip and break the chip. The chip breaking is the principle of using the material to work harden and be impacted and crushed to achieve the breaking strength. With the improvement of powder metallurgy technology, most automatic line tools use chipbreaker chip breaking. In the past two decades, based on the straight groove and the chute, the chipbreaker with a combination of a straight edge, a fold line edge, a curved edge and a curved surface, a multi-faceted protrusion, and a concave type has been researched and developed. More mature experiences include negative chamfers, stepped chutes, transition edges and raised combinations.
Chipbreaker profile type: groove combination of negative hole chamfering and bottom surface curved surface; chipbreaker profile is composed of multiple protrusions; chipbreaker width gradually increases from the tip to the middle and forms two curved surfaces Or a combination of two or more surfaces. For example, the cutter groove type is composed of a negative chamfer and a bottom surface and a groove, which can cause three-dimensional deformation of the chip on the rake face, which causes the chip to become shorter, thicker, narrower, curved, and easy to encounter obstacles. Broken. The above various blade shapes and groove surface patterns are organically combined, so that the chip breaking effect of the carbide indexable insert is improved, the chip breaking effect is more stable, and the range of chip breaking is further expanded.
Cutting sipe type: The chip breaking device of the indoor lifting machine can be the same as the chip breaking mechanism of the chip breaking groove on the blade, or it can be different, and it can be broken based on the deformation hardening of the processing material and then subjected to external force. Chip breaking can be achieved by cutting, heating, and the like. There are many types of chip breaking devices, which can be roughly classified into mechanical, hydraulic and electrical.
Several common chip breaking devices that have been used in production at present are: chip breaking with a cutter. The device provided during cutting introduces the chips into the passage, and the cutter cuts the chips in a certain manner, collects them, and uses the baffle chip breaking device to break the chips. A baffle having a certain curved shape is disposed above the turning tool, and the chips flow out from the rake face, and are guided by the baffle to cause collision and bending, and undergo additional deformation to break the chips.
Chip Breaker: Use a hydraulic vibration device to break the chip. A certain pressure oil is driven into the oil chamber according to a certain timing, and the oil pressure drives the piston to generate periodic vibration on the work table fixedly attached thereto. This not only causes a change in the thickness of the chip but also an impact between the chip and the blade surface to achieve chip breaking.
The chip breaking device is stable and reliable, but the cost is relatively high. Only the automatic line for mass production is economical.
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