Chopping knife
A rivet and thread technology, which is applied in the field of thread rivets, can solve the problems of difficult workpiece splitting, etc., and achieve the effects of increasing volume and weight, reducing product cost, and being convenient to use.
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[0023] See figure 1 , The riving knife 1 of this embodiment is a threaded riving knife that rotates under the drive of a power source, and includes a threaded conical section 2, a threaded frustoconical section 4 and a threaded cylindrical section 6 connected in sequence.
[0024] The threaded conical section 2 has a head 8 and a tail 10 . Wherein, the head 8 is a cone point.
[0025] The smaller the taper angle α of the threaded cone section 2 is, the easier it is for the riving knife 1 to screw into the workpiece; but if the taper angle α of the threaded cone section 2 is too small, the strength of the threaded cone section may not be sufficient. In this embodiment, preferably, the taper angle of the threaded conical section 2 is greater than or equal to 15 degrees and less than or equal to 35 degrees. More preferably, the taper angle of the threaded conical section 2 is 25 degrees. With such arrangement, the threaded conical section 2 can be smoothly screwed into the wor...
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