RU26764U1 - TAP - Google Patents

Description

2002111732 g about with g. ..,, 1ттщМПК в 23 G 5/06 The utility model relates to the processing of metals by cutting, namely to tools for cutting internal threads, and can be used in the design of taps for cutting precision threads. The known design of the tap (A. S. USSR Ha 139906, class 49e, 10, publ. 1961, bull. No. 14), containing a shank, chip grooves, gauge and intake parts, the thread-forming elements of which are made in the form of feathers with teeth, this teeth in the final section of the calibrating part is made barrel-shaped in an arc section along the average diameter. This design of the tap provides thread cutting with an accuracy of no higher than 6N. The execution of the barrel-shaped teeth only on the final 3 iacTKe of the calibrating part does not provide reliable orientation of the tap in the resulting threads, therefore, errors in the thread parameters appear. Closest to the proposed solution in aggregate. ,. .. signs and the achieved result is the design of the tap (AS USSR No. 483206, IPC V 23 G 5/06, 12/23/75), containing a shank, chip grooves, gauge and intake parts, the thread-forming elements of which are made in the form of feathers with teeth having in the arc section along the average diameter cutting and plastically deforming

sequentially across the width of the pen, starting from its front face, and the teeth of the intake part along the desired diameter in cross section are made with a straight header.

This design of the fastener ensures reliable orientation of the teeth of the tap in the thread being cut and obtaining sufficient thread accuracy. However, the implementation of external diamegres on the cutting and plastically deforming tooth sections of the calibrating part of the same size leads to their intensive wear. This causes a decrease in the dimensional stability of the tap and the accuracy of the thread it uses.

The objective of the proposed solution is to increase the accuracy of the cut thread and increase the dimensional grooves

To solve this problem, a tap containing a shank, chip grooves, a gauge and intake parts, thread-forming elements of which are made in the form of feathers with teeth, in the arc section along the average diameter are cutting and plastically deforming, often barrel-shaped, located on each tooth sequentially in width starting from its front face, moreover, the teeth of the intake part according to the new diameter in the cross section are made with a direct tightening, it is proposed in the cross section along the outer diameter ubya kalibruyushey part to perform cutting on areas with a straight, and plastically deforming j acTke perform direct and counter zatshovkami, the maximum outer

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their diameter in the plastic deforming section is larger than the maximum outer diameter in the cutting section.

To solve the problem at the tap, the maximum outer diameter of the teeth of the calibrating part in the plastically deforming section is proposed to be performed larger than the maximum outer diameter of their cutting section by 0.02 - 0.15 mm.

The implementation of the proposed konshtushcha tap in the cross section along the outer diameter of the teeth of the calibrating part on the cutting sections with a straight line, and on the plastically deforming section with the oncoming and straight backings, as well as the implementation of the maximum outer diameters on the cutting and plastically deforming sections of the teeth of the calibrating part of different sizes leads to reduction of wear of their dimension. Such an implementation of the teeth of the calibrating part, forming the final thread profile and smoothing the threaded surface with their plastically deforming sections, allows for reliable orientation of the tap teeth in an un threadable thread and to reduce the wear rate of their outer diameter. This increases by 2-3 times the margin for wear of the outer diameter of the tap and proportionally increases its dimensional stability, while ensuring the degree of accuracy of the cut thread is not lower than 4N.

When conducting a search in the patent and scientific and technical literature, no solutions were found containing the totality

the proposed features, which allows us to conclude that the proposed technical solution meets the criterion of "novelty.

The industrial applicability of the proposed solution is evident from the description of the design of the tap.

An example of a specific implementation of the proposed design is illustrated by drawings.

In FIG. 1 shows a general view of the tap; FIG. 2 - a thread-like element made in the form of a feather with teeth, in FIG. 3 is a section AA of the intake part, in FIG. 4 is a section BB of the calibrating part; FIG. 5 arc section of the tooth along the average diameter.

The tap contains a tailpiece 1, chip grooves 2, a gauge 3 and a fence 4 parts, the thread-forming elements of which are made in the form of feathers 5 with teeth 6, on which cutting 7 and plastically deforming sections 8 are made, arranged consecutively along the width of the teeth 6, starting from their front facets 9.

The cutting section 7 is, 6 - 0.7 from ppfiny of the tooth 6, and the plastically deforming section 8 is BYu, 3 - 0.4 from the width

tooth 6. The sides of each tooth 6 are backed. On the cutting section 7, the sides of each tooth 6 (FIG. 3) are made with a straight backing KI 0.01-0.05 mm along the average diameter d of the tooth 6. On the plastically deforming section 8, the sides are double-backed (straight and counter) by KI 0.02-0.1 mm average

diamegru dc2 and have a barrel-shaped in an arc section (Fig. 5). On the outer diameter, all the teeth 6 of the intake 4 parts are made with a direct backing (K - (Fig. Z). The teeth 6 of the calibrating 3 parts in the plane of the cross section (Fig. 4) are made along the outer diameter Dp of the cutting 7 section with a straight backing Кз 0, 01-0.05 mm, and in the plastically deforming section 8 along the outer diameter Vd, they were made with a counter and straight backings K4 of 0.02-0.12 mm, the Outer diameter of Vd (Fig. 4) is larger than the outer diameter Dp. the indicated diameters is 0.02-0D 5 mm, depending on the pitch of the thread being used.

The work of the proposed tap is as follows.

The tap, screwing into the part (not shown in Fig.), Removes the chips by the cutting sections of 7 teeth 6 of the intake 4 and calibrating 3 parts, and the plastically deforming sections of 8 teeth 6 of the intake 4 and calibrating 3 parts, reliably orientates in the threads and smooths the threaded surface throughout the profile, preventing it from breaking.

The use of taps of the proposed design provides an increase in the period of its durability with consistently high accuracy and a high class of surface cleanliness of the cut thread.

C) D // U-5 3 2 (

Claims (2)

1. A tap containing a shank, chip grooves, a gauge and intake parts, the thread-forming elements of which are made in the form of feathers with teeth having in the arc section along the average diameter cutting and plastically deforming barrel-shaped sections located on each tooth sequentially along the width of the feather, starting from its front face, and the teeth of the intake part along the outer diameter in the cross section are made with a straight backing, characterized in that in the cross section along the outer diameter of the teeth are calibrating Asti cutting portions made on straight, and plastically deforming portion configured to direct and counter-backing, wherein the maximum outer diameter in its plastically deforming portion is formed larger than maximum outer diameter of the cutting portion. 2. The tap according to claim 1, characterized in that the maximum outer diameter of the teeth of the calibrating part in the plastically deforming section is greater than the maximum outer diameter of their cutting section by 0.02-0.15 mm.