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Shanghai reaming knife manufacturer _ reaming tool price _ reaming knife operation introduction
Shanghai reaming knife manufacturer _ reaming tool price _ reaming knife operation introduction
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Multi stroke honing is a more flexible and capable process because it uses "smart" tools under servo control. The reciprocating grinding tool with expanded stone components can control the size with an accuracy of 0.000001 inches. The feed force of abrasive can also be servo controlled. In addition to diamond coated tools, the abrasives used in multi stroke honing are self-healing. Multi stroke tools can be customized with different abrasive lengths and widths to handle blind holes, port holes, or landing holes. Finally, multi stroke honing produces distinct and uniform cross hatched patterns on the surface of the hole, which can be finely controlled to produce consistent, specific surface parameters that affect part wear, lubrication, lifespan, noise, and more.
one wayHoning machineUse a series of gradually increasing diamond mandrels with fixed diameters and grit sizes. Abrasive is not self repairing. single channelHoning toolsRotate during one stroke in the inlet and outlet hole, but servo control stroke provides a certain degree of flexibility, adjustable speed, and various feed curves, such as pecking, short stroke, and stopping. Single pass honing is limited in terms of part configuration and materials that can be processed. Parts with an L/D ratio of up to 1:1 are ideal. If the transverse or other holes interrupt to allow chip flushing, the single hole size is also suitable for keyway holes or longer L/D ratios. This process can mimic but not repeat the cross shadow pattern generated by multi stroke honing - this is a key difference for certain components. When the diameter is less than 0.300 inches, the tool strength becomes a limitation.
Whether to use single stroke or multi stroke honing processes can sometimes be a clear choice. For example, blind holes always require a multi stroke process unless there is a large gap at the bottom. In other cases, various factors can affect decision-making, including:
Part Material
Multi stroke honing is suitable for almost any material, including the hardest steel, aluminum nickel cobalt alloy, zinc, carbides, ceramics, and plastics. Through controllable cutting actions, it can better control the chip size, even for sticky chips.
Single pass honing is suitable for cast iron, powder metal, ceramics, glass, graphite, and other easily machinable materials, but not for extremely hard or soft materials. Generally speaking, materials used for producing long and thin chips have poor performance during one-way honing.
Line correction
Multi stroke honing can correct holes with curvature errors (banana shaped), especially for parts with L/D ratios greater than 1:1. The size of the abrasive is usually set to bridge the curvature in the workpiece to process it.
In parts with curvature, the sizing area on a single channel tool follows the hole, so geometric errors cannot usually be corrected. Compared with multi stroke honing, specialized single channel tools with longer sizing areas have also achieved limited success in reducing camber angles.
L/D ratio
Multi stroke honing can be used for most L/D ratios. Parts with short holes, such as connecting rods, can even be stacked to achieve higher productivity.
Single honing is not suitable for parts with an L/D ratio exceeding 1:1, unless there is an interruption in the part, which can be used to flush the chip.
Inventory clearance
According to its size and design, multi stroke honing tools can be adjusted within a large diameter range. For example, a 6-inch tool may have a half inch extension range. This is the theoretical removal potential of the tool. In some applications, such as oilfield equipment, cutting a few inches is common.
The chip gap between the bonding surface of the tool abrasive and the workpiece determines the cutting rate of a single honing, which is then limited by the taper used on the diamond spindle, typically ranging from 0.001 to 0.005 inches. Cutting also depends on the material, hardness, and geometric shape of the parts.
Surface texture
The retention of lubricant on the surface of component holes is crucial for many applications. When it is necessary to accurately reproduce surface finish parameters and specific cross hatching angles, multi stroke honing is the only option.
Most of the cutting in a single honing occurs during the downstroke. Even during the final reciprocating motion of the tool, this produces a spiral hole texture, with almost no change in the surface during the upstroke. In many applications, this spiral surface is unacceptable.
Surface Treatment
If any process appears suitable but the component requires consistent surface finish during the service life of the abrasive, then single pass honing will be inappropriate because the abrasive is not self-healing. With few exceptions, multiple honing uses self leveling abrasives, which always expose fresh, sharp gravel.
A one-way diamond tool will produce larger burrs because the final surface finish will change over time as the diamond grit becomes passivated. As the gravel becomes dull, the surface smoothness tends to become smoother. Single pass tools also require more power and torque to cut when worn, similar to worn drill bits or reamers.
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