DD246060A1 - DEVICE FOR HOLE SIZE DETERMINATION OF SHAFTS - Google Patents

Abstract

The invention relates to Schaelbohrer, as they are used for processing thin-walled materials. These are provided with markings (3) and associated numerical diameter data (5), which make it possible to determine the diameter produced or to be produced without auxiliary means. All characteristic details are so on the circumferential segment (2) and in the flute (4) mounted so that the function of the peeler is not impaired. Fig. 1, 2

Description

For this 1 page drawings

Field of application of the invention

The device for hole size determination in peeling drills is used in kegligen drilling tools for machining thin-walled materials in the metalworking industry, especially in the body shop.

Characteristic of the known technical solution

Are known devices for hole size determination in peeling drills, which are designed as additional stop and guide device, as set forth in the published patent application DE 33 29 68. The disadvantage here is the high cost of producing such an accessory for only grobzustufte Durchmesserarigabe. The peeling drill described in the document DE 2921190 is followed by a cylindrical cutting part to achieve a desired diameter of the conical cutting part. The disadvantage here is the additional production cost for the cylindrical cutting part and the achievement of only a defined diameter.

Object of the invention

With a technically economical little effort a device for hole size determination of different diameters is to be created in peeling drills.

Essence of the invention

The object of the invention is to provide a device for hole size determination in peeling drills, which allows a direct assignment of the bore diameter produced to the penetration depth of the peeling drill with usual accuracy requirements.

According to the invention, this object is achieved in that the different bore diameters are arranged as markings on the peeling drill.

It is advantageous that these marks are arranged on the back sanding UmfangsssegmeTvt and the associated diameter numbers in the flutes.

To increase the reading accuracy, it is also advantageous to mark both circumferential segments and flutes such that the two marks are offset by half the amount of their gradation to each other.

It is of particular advantage to provide these diameter specifications when clamping the tensioning drill without tensioning.

In larger diameter peeling drills, the simultaneous signing of the markings to the associated diameter provides a great advantage.

embodiment

The invention will be explained in more detail below with reference to two embodiments. In the accompanying drawing show:.

Fig. 1: a peeling drill in plan view

Fig. 2: a section of the peeling drill

3 shows a peeling drill with a second offset mark according to FIG. 1

Fig. 4: a peeling drill larger version with marking and diameter on the circumferential segment

Embodiment 1

In a peeling drill according to FIG. 1 with at least two cutting edges (1), markings (3) are arranged on the circumferential segment (2) having the relief grinding relative to the cutting edge (1). These are assigned on the same circumference in the lying between the cutting edge (1) and peripheral segment (2) flute (4) numerical diameter data (5). The markings (3) are advantageously accommodated in the central part of the circumferential segment (2) in order not to impair the cutting and supporting function of the flanks (6), as shown in FIG.

Embodiment 2

On the peeling drill according to FIG. 3, the markings (3) are each mounted half the amount a, alternating between the two circumferential segments (2). The assignment of the corresponding diameter data (5) are mounted in each of the cutting edge (1) upstream flute (4). As a result, a finer assignment of the individual diameters is achieved.

Claims (5)

Invention claim: 1. A device for hole size determination in peeling drills, characterized in that the different bore diameter as markers (3) on the peripheral segments (2) relative to the cutting edges (1) are arranged. 2. facilities for hole size determination in peeling drills according to claim 1, characterized in that the markings (3) on the same U mfangsl in ie the diameter corresponding numerical diameter data (5) in the flutes (4) are assigned. 3. devices for .Steel size determination in peeling drills according to claim 1 and 2, characterized in that the markings (3) are arranged alternately on the circumferential segments (2) by half the amount of the gradation a. 4. means for determining the hole size of peeling drills according to claim 1, characterized in that on the 'Umfangsssegementen (2) markings (3) and associated numerical diameter data (5) are formed approximately centrally. 5. means for hole size determination in peeling drills according to claim 1 to 4, characterized in that the markings (3) and the numerical diameter indication (5) are provided during chipless forming of the peeling drill.