Method for producing threaded holes and tool for drilling threaded holes
A threaded hole and cutting tool technology, applied in the direction of manufacturing tools, thread cutting tools, tangent devices, etc., can solve problems such as damage to the contact performance of threaded components, material wear, etc.
Active Publication Date: 2020-12-04
AUDI AG
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- Application Information
AI Technical Summary
Problems solved by technology
As a result, on the side of the thread profile of the internal thread facing chips, material wear can occur, which leads to defective locations in the internal thread
This defect site can in turn impair the contact performance of the threaded element screwed into the internal thread
Method used
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Embodiment Construction
[0039] exist figure 1 The completed threaded blind hole - hole 1 is shown in . The hole 1 is machined into the workpiece 5 by means of so-called push-on drilling until its bottom 3 reaches the nominal hole depth t B , later based on Figures 5 to 8 Explain push hole machining. Bore 1 has at its bore opening a circumferential threaded inset 7 , which merges downwards into an internal thread 9 in a subsequent extension. The internal thread 9 extends along the bore axis A to the available nominal thread depth t G . if available from figure 1 As obtained in , the thread 15 of the internal thread 9 leads into the circumferential groove 13 with the thread end 11 . The circumferential groove 13 has no pitch / pitch and is formed between the internal thread 9 and the bore bottom 3 as viewed in the axial direction. The thread thread 15 has a radially outer thread base 17 and lateral upper and lower thread profile flanks 18 , 19 , which merge radially inwardly into an inner thread ...
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The invention relates to a method for producing a threaded hole (1) in a workpiece (5) using a threaded hole drilling tool (23) having a main cutting edge (27) on its drill tip (25) and a Thread forming profile (29) following on the threaded hole drilling direction (I), wherein the method has: a threaded hole drilling stroke (G), in which the Drilling thread feed rate (f G ) and the threaded hole drilling speed synchronous with this (n G ) introduces the threaded hole drilling tool (23) into the workpiece (5), and the tool-main cutting edge (27) produces a bottom hole, and the tool-thread forming profile (29) forms an internal thread (9) on the inner wall of the bottom hole. Chips (51) are generated during the threaded hole drilling stroke (G) and are carried out of the threaded hole (1) in the chip removal direction opposite to the threaded hole drilling direction (I) and are here integrated with the internal thread ( 9) against the thread profile flanks (19) facing the chips (51) to be ejected. According to the invention, in the threaded hole drilling stroke (I), the chip-facing thread profile flank (19) of the internal thread (9) has not yet been machined to final size, but has a flank allowance (Δx), precisely , in the case of forming a collision profile (53) that collides with the chips (51) to be ejected.
Description
technical field [0001] The invention relates to a method for producing threaded holes, in particular threaded blind holes, and a tool for drilling threaded holes. Background technique [0002] In the so-called push-drilling thread drilling process, with the push-drilling thread drilling tool, not only the base hole is drilled but also the internal thread is tapped in a common tool stroke. The push-type thread-drilling tool has on its drill tip a main cutting edge and a thread-forming contour following in the direction of drilling the threaded hole, the thread-forming contour having at least one thread-cutting tooth. In this method, the threaded hole drilling stroke is first carried out and then the opposite reverse stroke is carried out. During the threaded hole drilling stroke, on the one hand the main cutting edge of the tool produces the pilot hole and on the other hand the tool thread forming contour produces an internal thread on the inner wall of the pilot hole until ...
Claims
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IPC IPC(8): B23G5/20
CPCB23G1/34B23G5/20B23G2200/143Y10T408/9048B23G2210/04B23G2210/44
Inventor P·科普顿
Owner AUDI AG