The fastest inspection method to identify the adva

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Inspection method to quickly identify the advantages and disadvantages of taps II. Closed loop control

there are many taps in the market. Due to the different materials used, the price of the same specification also varies a lot, which makes the buyer feel like seeing flowers in the fog. I don't know which one to buy. Here are some simple methods:

when purchasing (because there is no testing equipment, except slotted taps), you can simply detect (M6 as an example):

1, Check whether the shovel grinding (chamfer) of the thread at the front end of the tap groove is uniform, and whether the cutting edge of the cutting groove has a fast edge. The good ones are positive 7-shaped, and the bad ones are inverted 7-shaped or U-shaped (when exiting the tapping, it will cause two cuts, which are easy to break and affect the accuracy of the thread;

2, test the heat treatment: the tap draws together industry decision-makers and senior technical experts from all over the world, and falls into the air as a parabola (about 5 meters) to check whether it is broken, Fracture indicates brittleness

3, knock off the tap, and see that its fracture is inclined long, and the grains (metallographic structure 10.5 #) in the fracture are fine knots, indicating that the heat treatment and material are good, flat or inclined short, and the coarse measurement of grains (metallographic structure) is not good

so as to solve the problems caused by plastic.

the quality of the tap mainly depends on its original material, heat treatment, groove type, accuracy, equipment, therefore, speed and processed material, hardness, the quality of the operating staff, and so on! When selecting taps, pay special attention to the original material, heat treatment and groove type of taps. For different machining holes, it is recommended to choose different types of taps

in practice, the grinding of the cutting edge is very important, especially for the stainless steel series. Fractional cutting and lengthening of the guide can be used. The cutting edge should be ground into a lower angle to increase the strength of the tap. At the same time, the cooling and lubrication should keep up (with pumping). The service life of the tap is also relatively long! In short, we are dealing with specific situations

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