DD141636A1 - METHOD AND TOOL FOR PRODUCING THREADED PROFILES - Google Patents

Description

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Title: Method and tool for the production of thread profiles.

) Field of application of the invention . ,

The invention relates to a method and a. Tool for producing thread profiles by thread-peeling or swirling, preferably for long, high-precision threaded spindles

Characteristic of the Known Technical Solutions Methods are known for producing thread profiles for both external and internal threads by thread-peeling or whirling (Klingelnberg, "Technisches Hilfbuch", 14th edition, Springerverlag Berlin / Göttingen / Heidelberg 1960, pages 620-622 ). Here, after previous, as accurate as possible production of the thread -J outer diameter by turning or grinding, by means of a provided with cutting tools whirling the cutting of the thread profile in the workpiece. As is evident also from the Pirmendruckschriften "information about the thread peeling" from ₀ Waldrich, Coburg, pages 1 to 3 and 12, and "The Time-saving cutting of external threads, internal threads, 'special profiles" from * H. Burgsmüller & Söhne GmbH, Kreiensen, the chip removal takes place for the production of the threads characterized in that a tool provided with cutting tools (vortex head or vortex mandrel) revolves around the rotating workpiece, wherein the

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Rotation axes of tool and workpiece do not coincide. The cutting tools are inserted in the tool so that they are almost tangentially engaged on the workpiece »Workpiece and tool rotate at different speeds · The cutting tools have a cutting edge that corresponds to the respective thread profile to be produced.

The company publication by Burgsmüller & Söhne "Hubwirbelaggregat" shows a swirl mandrel and its application for the production of internal threads. In this case, a profiled according to the thread to be cut cutting tool is used in a tool holder. The tool holder forms with the axis of the workpiece, in which the internal thread is to be cut, a Winkelj which corresponds to the pitch angle of the thread to be produced.

With this tool, only the thread profile

, 'cut' The core diameter of the internal thread must be made in a separate operation.

When using the threaded rod for the production of long high-precision threaded spindles, preferably for Wälzschraubtriebe, it is necessary that the external diameter of the outer diameter and internal threads of the core diameter is prepared very carefully. Outer or core diameter and the thread profile must not have any concentricity deviations. So far, the thread profile has been produced in separate technological sequence on turning or grinding machines outer and core diameter and then on machines provided with vortex heads or thorns. The following disadvantages occur, which adversely affect the quality of the threaded spindles or nuts and the labor productivity. "A repeated clamping and alignment of the workpieces on different machines is necessary. Run-out deviations occur - between thread profile and outer or "core diameter" - which lead to increased reject rates and production costs.

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Aim of the invention;

It is the purpose of the invention to eliminate the disadvantages of the prior art and to improve the labor productivity in the production of threaded workpieces and the quality thereof.

Explanation of the essence of the invention:

The invention is based on the object to provide a method and a tool for carrying out the method with which concentricity deviations between the thread profile to be produced and the core or outer diameter of the thread can be avoided. According to the invention, this object is achieved in a method for producing thread profiles by thread whirling or peeling, that both the outer diameter of the thread at · male threads or the Kerndurchmes.ser of the thread with internal threads and the Gewrndeprofil the workpiece itself, simultaneously in one operation and be prepared in a clamping with appropriately designed and arranged in a tool holder cutting tools.

It is advantageous that at least one of the arranged in the tool holder cutting tools edit the outer or- core diameter of the thread machining and make the remaining in the freekzeugaufnahme arranged cutting tools the thread profile.

A tool for carrying out the method, consisting of a tool holder and arranged therein cutting tools, is designed so that the cutting tools are arranged in the tool holder in a plane and that the cutting edge of the cutting tools profiled according to the thread profile to be cut and the outer or core diameter is, wherein the plane is inclined by the pitch angle ecdes to be cut thread to the workpiece axis.

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It is advantageous in a tool that the Außenbzw, core diameter machined cutting tools are offset from the thread profile producing cutting tools in the tool holder in the direction of the workpiece axis.

It is also advantageous that the individual, arranged in the tool holder cutting tools are composed such that a part of the cutting tool for producing the outer or * core diameter and a:: -:

second part, which is provided with a profiled according to the thread to be cut cutting edge is provided for the preparation of the thread profile.

When using the method and the tools for producing threads, in particular precision threads for long spindles and nuts, by peeling or whirling, it is achieved that, ß runout deviations between thread profile and outer or core diameter does not occur *. It also saves the operation of the previous .- working of the outer or core diameter _$ because they are made, together with the thread, in one setting and in one operation, also the reject rates and production costs are reduced.

Implementation example pie1:

The invention will be explained in more detail below * In the drawing, tools for carrying out the method are shown

 Show it;

, FIG. 1 shows a swirling tool for the production of external threads;

FIG. 2 shows a section through a tool according to FIG. 1 _? FIG. 3 shows a "swirling tool for producing internal threads,

4 shows a development in section A-A of FIG. 3 and FIGS. 5, 6, 7 and 8 show individual cutting tools *

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The method for producing thread profiles by thread-peeling or whirling consists in particular in that a tool holder provided with cutting tools of a peeling or whirling unit is moved in the axial direction to the workpiece. This workpiece and tool holder are driven in the same direction, but at different speeds. The axes of rotation of workpiece and tool holder do not coincide. Each of the arranged in the tool holder cutting tools has a correspondingly profiled cutting edge, so that at the same time, and in one operation, the thread profile - and external threads - the outer diameter or internal threads of the core diameter are produced.

In the following, tools will be described with reference to the drawing, which are necessary for carrying out the method.

The tool shown in Figure 1 for producing external thread, preferably for long, accurate spindles, by thread whirling, comprises a tool holder 1, in which cutting tools 2, 3, 4, 5 are clamped, which are used to produce the thread in the workpiece and the outer diameter serve. As can be seen from FIG. 1, the axis of rotation 7, of the workpiece 6 and the axis of rotation 8 of the tool holder 1 do not coincide. With the arrows, the directions of rotation of the tool holder and workpiece 6 are marked. Both are in synchronism. The speeds of workpiece 6 'and tool holder 1 are different. ,

The cutting edge 9 of the cutting tools 2, 3, 4, 5 engages in their movement to the slower rotating workpiece in this and manufactures the thread profile. The cutting edge 9 of the cutting tools 2, 3, 4, 5 is in accordance with the thread profile to be produced and to be produced

35. Outer diameter profiled. It is thus cut from each of the cutting tools 2, 3, 4 and 5, the outer diameter and the thread profile »In this tool are in

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the tool holder 1, the cutting tools 2, 3, 4 and 5 arranged in a plane, said plane is inclined by the pitch angle-6f .des to be cut thread to the axis of the workpiece 1.

The tool holder 1 shown in section in Figure 2 has a composite of two parts 10 and 11 cutting tool (Figure 7), of which with the part 10 of the outer diameter of the thread and with the part 11, the ßewindeprofil in a single operation ¹ and. be cut in a workpiece clamping. Instead of a composite cutting tool and a one-piece cutting tool, according to Figure 8, are used in the tool holder 1.

Trailing the eddy tool, an axially, radially and angularly adjustable to the workpiece deburring tool 12 may be arranged.

For the production of internal threads according to this method, a device is described in FIG. 3. In a swirling head 13, a machine tool 14, a tool holder 15 designed as a mandrel is arranged. In this tool holder 15, one or more cutting tools 16 are clamped, which serve to produce the thread profile 17 and the core diameter 18 of a workpiece. Tool holder 15 and workpiece 19 rotate at different speeds, wherein the axis of rotation of the tool holder 15 _S is inclined to the workpiece 19, by the pitch angle α of the internal thread to be produced.

In order to produce core diameter 18 and thread profile 17 at the same time in one operation and in a single clamping, as in the tool for producing external threads according to Figures 1 and 2, the cutting edge of the cutting tool 16 is profiled accordingly. The shape is shown in FIGS. 7 and 8. To the

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For ease of re-sanding the cutting tool, this (16) is advantageously composed of two parts 10 and 11, with part 10 making the core diameter 18 and part 11 (FIG. 7) the thread profile 17.

Another tool for carrying out the method, consisting of a tool holder 1 ₃ 14 and disposed therein cutting tools 2, 3, 4, 5, 16 is so occupied with cutting tools that one or more of these cutting tools 2, 3, 4, 5, 16 for Production of the outer diameter or the core diameter and the other cutting tools, the thread profile from the workpiece 6, 19 work out. The shape of the outer diameter or core diameter cutting tools 20 is shown in FIG. The cutting tool 21 producing the thread profile is shown in FIG. 6.

In the tool holder 1, 14, these different cutting tools 20, 21 are arranged offset in the direction of the Yierkstückachse. The development shown in Figure 4 of the tool holder, according to Figure 3, shows the displacement of the cutting tools 20, 21. Advantageously

P is, as indicated in Figure 4, the displacement «· ie half the thread pitch of the thread to be produced.

With this tool design and arrangement is achieved that the thread profile and also the outer or core diameter can be made simultaneously and each other running in a circle.

In the exemplary embodiments, threads for Wälzschraubtriebe is shown. According to the same method, but with correspondingly profiled cutting tools, an accurate and economical production of all by thread whirling or peeling to be produced thread types and shapes can be achieved.

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Claims (4)

~ 8 - Claim for invention:  1. A method for producing thread profiles by thread whirling or peeling, wherein a provided with cutting tools, powered Werkzeugaufnähme a swirl or peeling unit moves in the axial direction of the workpiece .. and wherein the workpiece and the tool holder same direction of rotation, but have different speeds and whose axes of rotation do not coincide,. characterized in that both the outer diameter of the thread at external threads or the core diameter of the thread with internal threads, as well as a thread profile of the workpiece itself, simultaneously in one operation and in a clamping with correspondingly shaped and correspondingly arranged in the tool holder cutting tools produced. 2. The method according to item 1, characterized in that at least one of the arranged in the tool holder cutting tools edit the outer or, core diameter of the thread machining and the other, arranged in the tool holder cutting tools, produce the thread profile. 3. Tool for performing the method according to% item 1, consisting of a tool holder and therein clamped cutting tools, characterized in that the cutting tools are arranged in the tool holder in a plane and daJ3 the cutting edge of the cutting tools according to the thread profile to be cut and the outer or * core diameter is profiled, wherein the plane is inclined by the pitch angle of the thread to be cut to the workpiece axis. 4. Tool for carrying out the method according to item 1 and 2, consisting of a tool holder and therein clamped cutting tools, characterized in that the outer or core diameter be 3447 -s 2117 87 working cutting tools relative to the thread profile producing cutting tools in the tool holder offset in the direction of the workpiece axis "are arranged.
5 · Tool according to item 3, characterized in that the individual, arranged in the tool holder cutting tools are composed such that a part of the cutting tool for producing the outer or core diameter and a second part profiled with a, according to the thread to be cut Cutting edge is provided, are provided for the preparation of the thread profile. Hi8rzu__i_ $ siten drawings 3447