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How to achieve the perfect quality of precision slow-walking processing
(1) the choice of suitable mold material
is generally carried out after the hardening of the blank, such as the use of T8A, T10A and other carbon tool steel, due to the difficulty of quenching, hardening layer shallow, after the use of repair and grinding may be hardened layer worn off and a significant drop in hardness. In order to improve the service life and processing accuracy of wire-cutting tooling, should be selected with good hardenability of alloy tool steel or carbide to manufacture, these materials from the surface to the center of the hardness is not significantly reduced.
(2) Improve the mechanical transmission accuracy
The mechanical transmission accuracy has a great influence on the machining accuracy. The displacement accuracy of the table and the movement accuracy of the electrode wire both directly affect the machining accuracy. As the movement of the table is driven by multiple transmission subs, such as gear subs, screw and nut subs, their transmission accuracy directly affects the machining accuracy. The movement accuracy of the electrode wire is subject to the rotary accuracy of the guide wheel, the uneven wear of the guide wheel and the slackness of the electrode wire, etc. It also has a greater impact. It can be seen that the mechanical transmission accuracy is not high on the processing quality has a greater impact.
(3) Reduce residual stress
In processing with wire cutting, will cut off large pieces of metal, will make the internal residual stresses in the material of the relative equilibrium state is disrupted, the stress will be redistributed. Residual stress in the material is sometimes more serious than the machine precision and other factors on the processing accuracy of the impact, can make the deformation to a macroscopic visible degree, even in the cutting process the material will break. In order to reduce the deformation caused by residual stresses, measures should be taken, such as the correct choice of heat treatment specifications; workpiece profile should be 8-100mm from the edge of the blank; before wire cutting, aging treatment can be carried out; pre-machining before quenching to remove most of the residual; for wire cutting, the second cutting method, the first rough cut type hole, to be a new balance of stress before fine cutting type hole; choose the correct cutting sequence, etc. The above measures are of great benefit to reduce the residual stress in the material.
(4) Reduce surface roughness
The surface roughness of the mold cavity
has a greater impact on the quality of plastic parts
, and should be thought of ways to reduce the surface roughness when cutting and processing. To this end, relevant measures should be taken, such as electrode wire tensioning is not enough, should always be tightened; feed speed should be adjusted appropriately to avoid fluctuations in speed; mechanical transmission gap is too large is also easy to make the electrode wire shaking, so that the roughness increases, to adjust the mechanical transmission part of the tightness in a timely manner; the correct choice of electrical parameters to avoid a single pulse is too large. In addition, the electrode wire walking speed is too fast or jittering will also affect the surface roughness of the parts. They are not good for quality improvement.
company has a variety of processing equipment such as turning, milling, planing, sawing, drilling, grinding, etc., strong production strength, quality assurance, precision slow-walking processing on HXTech
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