TH138573A - Screws that can be drilled and cut quickly. - Google Patents

Abstract

DC60(10/04/55) Threaded rivets that can be drilled and cut quickly have two beveled cutting planes with edges. For cuts made on the convergence section of the member cutting plane for positioning the tapered member. It is extended from the converging part of the cutting plane so that the cutting edge is divided into sub-level cutting edges. It is a dual-edge design using components for positioning each sub-edge to be defined. Provided that there is a certain level of bevel, the total angle included by the sub-level cutting edge is less than 180 degrees of helix. Several spirals on the shaft of the screw also extend to the cutting edge of the sub-set. Components positioned against the object ensure consistent thread performance at internal distances. Subsequent tightening of the first thread of the micro-cutting edge creates a popular abrasive effect on the When objects are drilled this way, the tightening torque is reduced and the drilling speed is increased. This is a good idea. The fastened screw should be immersed in the object and the fastening operation can be completed. Threaded studs that can be drilled and cut quickly have two beveled cutting planes with edges. For cuts created on the convergent top of the tapered assembly cutting plane. It is extended from the upper part towards the cutting plane so that the cutting edge is divided into sub-level cutting edges. It is a dual-edge design using components for positioning each sub-edge to be defined. Provided that there is a certain level of bevel, the total angle included by the sub-level cutting edge is less than 180 degrees of helix. Several spirals on the shaft of the screw also extend to the cutting edge of the sub-set. Components positioned against the object ensure consistent thread performance at internal distances. Subsequent tightening of the first thread of the micro-cutting edge creates a popular rubbing effect on the When objects are drilled this way, the tightening torque is reduced and the drilling speed is increased. This is a good idea. The fastened screw should be immersed in the object and the fastening operation can be completed.

Claims (9)

1. A screw that can be drilled and cut quickly, consisting of a shank, a head arranged at the end. On one side of the shank, the bore part is positioned at the other end of the shank and the unit. Several helixes are arranged in such a way that they are spiraled around Such stalk by At the slanted cutting plane Two are created on the bore and the two slant cutting planes are connected at the cutting edge, with the tapered positioning assembly extending outside from the deflection of the The cutting plane to divide the cutting edge into a double sub-cutting edge. Where the edge for Each subsection is laid out as an inclination angle, a total angle that is created. By the edge for cutting sub-level When the sub-cut edge is less than 180 degrees, the total angle of the subsection edge is broken. This differs from the second total angle of the tapered portion of the said tapered positioning assembly. 2. The screw as specified in claim 1, where the free space set on the said shaft divides Such threading units are the first and the second. Where the first diameter of the free space It is longer than the second diameter of the stem, but shorter than the third of the Such threading unit 3.The screw as specified in claim 1, whereby the aforementioned second combination of the tapered part of The tapered positioning assembly is smaller than the first total angle of the cutting edge. Such sub-level 4. Screw as specified in claim 2 where at the aforementioned second integral corner of the tapered part of The lowering positioning assembly is smaller than the total corner of the cutting edge. Such sub-level 5. The screw as specified in claim 1, whereby such threading unit on the said rod is flattened. Extend to the above trim edge to connect one end of the sub-cut edge. 6. Screws as specified in claim 1, where a third is fixed on the rod and has multiple complementary threaded sections. Where the auxiliary screw units are arranged Place between the threaded units, the fourth diameter of the auxiliary thread unit is short. Than the third diameter of such a threaded unit 7. Screws, as specified in claim 6, where multiple concave screw threads are to be formed on the unit. As such an add-on spiral, several second pilot holes are partially fixed on the unit section. Such a spiral 8. Screws as specified in claim 1, provided that such positioning components are It is built with multiple sloping walls for the pyramid structure. 9. Screws as specified in claim 1, provided that such positioning assemblies shall be Conical structure