Dwinauto chip shape OLED silicon chip laser cutting machine

Date:2022/5/10 7:03:02 / Read: / Source:本站

Dwinauto chip shape OLED silicon chip laser cutting machine

During the cutting process, due to the difference in workpiece material, geometric angle of the tool, cutting amount, etc., the degree of deformation of the chips is also different, so the types of chips generated are also different. There are four common types of chips: www.dwinauto.com

(1) Banded chips: The chips are long and band-shaped. The bottom layer in contact with the rake face of the tool is smooth and free of cracks, and the outer surface is hairy. When machining plastic metals, if the cutting thickness is small, the cutting speed is high, and the rake angle of the tool is large, such chips are generally obtained. The cutting process is relatively stable, the cutting force fluctuation is not large, and the surface roughness of the workpiece is low. , but attention should be paid to chip breaking during processing. www.dwinauto.com

(2) Cracked chips: The shape of the chips is still continuous, and the degree of deformation is larger than that of the band-shaped chips. The bottom of the chips has local cracks and the appearance is early serrated. It is generally produced when the cutting speed is low, the tool rake angle is small, the cutting thickness is large, and the medium hardness plastic metal is processed. When squeezing chips are formed, the cutting force fluctuates and the surface roughness of the workpiece is high. www .dwinauto.com

(3) Unit chip: If the shear stress exceeds the strength limit of the metal on the shear plane of the extruded chip, the crack will penetrate the thickness of the chip and form a trapezoidal unit chip. This kind of chip mostly occurs when the tool rake angle is small, the cutting speed is low, and the material with poor plasticity is processed, the cutting force fluctuates more during the processing, and the surface quality of the workpiece is worse. www.dwinauto.com

(4) Chipping chips: When cutting brittle metals, due to the poor plasticity and low tensile strength of the material, the cutting layer material often produces brittle chipping without plastic deformation, forming irregular fragmented chipping chips. At this time, the cutting force fluctuates greatly and is concentrated on the cutting edge, which is easy to damage the tool, and the surface roughness of the workpiece is also high. Therefore, it should be avoided in production. The method is to reduce the cutting thickness and make the chips become needles. At the same time, the cutting speed is appropriately increased to increase the plasticity of the workpiece material. www.dwinauto.com

Concept of free and non-free cutting, right and bevel cutting
(1) Free cutting and non-free cutting During the cutting process of the tool, if there is only one straight edge to participate in the cutting work, this situation is called free cutting. Its main feature is that the outflow direction of the chips at each point on the blade is roughly the same, and the deformation of the cut metal basically occurs in a two-dimensional plane;
On the contrary, if the cutting edge on the tool is curved, or several cutting edges (including the main cutting edge and the minor cutting edge) participate in the cutting and complete the entire cutting process at the same time, it is called non- free cutting. Its main feature is that the metal cut at the junction of each blade affects and interferes with each other, and the metal deformation is more complicated and occurs in three-dimensional space. For example, in external turning, in addition to the main cutting edge, there are also secondary cutting edges participating in the cutting at the same time, so it is a non-free cutting method. Under normal circumstances, most of the multi-blade cutting tools are this kind of non-free cutting. www.dwinauto.com

(2) Right-angle cutting and bevel cutting Right-angle cutting refers to the cutting when the inclination angle of the main cutting edge of the tool is 0°. At this time, the main cutting edge and the cutting speed direction form a right angle, so it is also called orthogonal cutting. www.dwinauto.com


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