DE1402498A1 - Process for making reamers - Google Patents

Description

x 14 02, 498.? , (. I ₁ Λ "9Μ Ib / 4j1) Lavallee o: Ide Ine»

Our sign: 'L 61 y

, aur manufacturer, van reamers

The "Sri" indun ^, petriff t,, a .7e; / lead to the. Her..ste _(cases of neibahlen or the like by curing a 'i-Leibanlenroiilirij.s sov.ie Öcnlcii'en of this blank ■ - "t / oer APlace ^ esaiirce Län..e on the ^ evünschten Enddux'chräesser the xlei' Oa
in one end of the hollow

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Jeim nersteliea von SpiralLohrem is known to harden a blank, towards it cylindrically loop and loop in the rods. JDerarti e soiral drills are known to be used for

BATH ORIGINAL

! • eligibility

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workUiU ^ use .; Tools that are by no means usable for the exact dimensioning of bores and their work. With this "well-known method, a twist drill is supposed to be able to be produced in a very costly manner, which is enough to run enough The setting of the reamer is by no means based on an absolute con ^ entricity of the., er; c ^ eu ^ es aerzus-jellen,. Such an order is at 3uiraloohr; ru ο "ine. ^A - -de meaning _r - since it tioii u \ a G-ro jprocessa ^. _; .sv; ^: - 'kz-3u e acts.

■ · - · .j. ■ -,. · ..; .- · - · ■■ ·, ■ -. ";""... ■ ·. ' , -.-.- ":: - ■ ;; ^! * _ ■:,. -. -. - üeibahlen are uus ^^ ö ^ -roenex:. ·; feinoear -eiTun ^ sryer .-.

ζ eu.je. .iiur .jändbearbeit αη-ü voa holes of ^{^:} ui.u _- ■ iiiaue.il, Abniesseligen. Is crucial in such i "Ceiijaiilen the ..oaolute XCON ^ entrizität zviischen -_ in, -. Eu _r .. .and the Sciiafte.nde ,, enuteteu jinde, _ This JenaMi ^ ICEi" iac Yorausset ^ Uiii xur.die ..eut-. . ielf ach v £ i \ L> .n, teu .. extraordinarily .. ^. er.in ^ sn..Be.-ii. '^ eitui-L

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So far, ΐί.εΐ ^ ΐιίεη, .ΐη x'ol_, eiider. , Ye.ise first was a LlLn-. E oii ^ eü round 3 Cco

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Iu entbi-.rteteK or getenip e: cχ η state tailored and- Ξ-.ux the ^ e ,, 'eise warden Sot "': i _o 'c manufactured- which were thought aux'cii a grinding cylindrical ,. Do To do this, the blank was clamped and centered at one end, and then the blank was turned around and clamped in The blanks in the next processing stage. Then the blanks were mounted in the grain-punched centers and then sputes were milled in the end sections. Condition At the end of the formation of the flutes, the blank was then hardened by a metal-handling process. Next, the hardened blank was mounted again in the punched holes in order to grind the nut end of the awl. Finally, the reamer was mounted again in the center of the center, and then the shaft of the reamer was replaced by another

The invention is based on the object

recruitment procedure

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to simplify setting procedures for reamers and nevertheless to adhere to the required extremely small machining tolerances.

According to the invention, the blank is first ground centerless and the hats are ground in such a way that a narrow longitudinal web of the final diameter achieved during centerless grinding remains, forming the outer edge of each hat. the
Accuracy is guaranteed by a single centerless
Scnleifgftng achieved. Advantageously, an intermediate length of the reamer length can be ground to a smaller diameter to form a tree for the chips to exit. Before hardening, each end of the reamer blank can be provided with a shallow hole. After hardening and grinding
with training one centering each in .iedem
End of the reamer concentric to the end diameter limeys er
be reground.

In-the drawing, the yei'fahrensöchritte performed on a reamer according to the "3rfindun _t oeispielsvveire illustrated. In it are:

Fi ^. 1 to 6 Dar8Ί.positionexi of the individual procedures

BAD OfSiGiNAL

80 £ 802 / ö39.2; ■ .-. . ■ -, ■■;

steps according to the invention for the production of a part) awl and ■

Pig. 7 is a view of a finished reamer on a reduced scale.

One of the advantages of the method according to the invention is that there is no need to provide self-centering lugs in the ends of a reamer for production. Nonetheless, centering holes may be desirable when the reamer is in use or when regrinding is required. \ {eim. If the finished reamer is to have centering holes, the first step of the method according to the invention consists in that a relatively shallow hole 10 is drilled in each end face of an uncured reamer blank 12 (Üg. T).

The next process step according to the invention consists shows that the blank 12 can be formed using any required heat treatment process

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driving hardens to give the finished reamer the required To give strength and hardness. This procedural step is illustrated for example in Fig. 2, according to which the blank 12 by means of gas flames is heated from a line 14.

At this point it should be noted that the carbon is made of any material suitable for reamers

and that the heat treatment depends of course on the material or alloy chosen. i £ s is remarkable also to "that da = .; method according to the invention can easily be introduced by reacting provides an already hardened Reibahlenrohling of the desired ± Iän _o e and of generally circular cross-section.

Starting from the hardened blank is the next one Step of grinding the blank 12 from one end to the other to a given diameter,

which is the same as the desired final diameter, the reamer. This is preferably done by means of a ; centerless a ciileif device with grinding wheels and -18 on the one resting on elix ^ m bed 20 (Fig. 3) Blank carried out. Centerless grinding

smoke light

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enables extremely tight diameter tolerances to be adhered to of the blank 12, and the out-of-roundness or deviation from the purely circular cross-section also practically avoided. Another advantage of bit-less grinding is that this Tolerances in a highly economical way also "at Mass production are feasible.

After the blank 12 is ground to the final size any of several possible procedural stages can be carried out. The in Fig. 4 is the next illustrated procedure in that at one end of the blank in s 12, e.g. using grinding wheels 22 and 24, tutes be sharpened and be sharpened. The blank 12 is held in a putter 26 during the grinding of the hats with the end that forms the shaft.

The chuck 26 can for "grinding successive Uui en / or. Sharpening the" cutting edges with "a division or a dividing head provided". "JB'e-j," ra iiinve -.- c: Cijleifen ■ at 30 a narrow "longitudinal web 32 remains, unaffected by the ac. S ^ itaeulos geßcnlixieneii ■ diameter,

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s§) that the SG-uiieidendurGhmesser of the one who wears the Itfuten .End of the. Reamer with the ax end of the same

remains completely concentric * j £ s would of course be possible, to cut or cut another outline, provided that the outer longitudinal edges of the cutting edges are limited by the same diameter, which was originally obtained by grinding the reamer blank over its entire length

The next step, illustrated in FIG. 5, consists in grinding the reamer to a reduced diameter 34 in a central part of the length of the reamer which extends a little way into the section carrying the hats. As shown, thereby the reamer and is also held with its Sehaftende in Deia Lütter 2 $ rotated by the latter, while the portion 34 is abraded by means of the Schleifscheibe36 on a _ö eringeren diameter. In this way, the free space required for the chips to emerge when using the iteibahle is created.

Venn the

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When the flutes are ground and the cutting edges sharpened , "Ind, .is the row ready for use". As ersicatlieh, - this is achieved without the need for centering holes in the end faces of the reamer, and although, even if the diameter 34 for the chip exit is decreased. .i £ s is quite simple, however, such, centering holes to be provided when they are later on the yer / twendun ^ of the reamer should be available.- in ex'st line was made by drilling the holes '10 before the hardening of the blank 12 eliminates the material at the stationary centering points of the reamer blank · iFach.dem hardening these holes can now open exact measure nachgearueit.et wer-der- and this is preferably done by making a countersink under the normal 7 / inch, as is the case with this one Kind-of "tools is common. Reworking is ■ illustrated in FIG. 6. The reamer is also held here in the putter 26 and is "in" rotation by this offset, and to produce a centering hole 42 (Fig. 7) in 'one end of the' reamer becomes a hard-metal tool 40 used. Then the reamer can ■■ "- ■ re-clamped and the other centering hole reworked will. Of course, instead of the hard metal tool

40 too

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40 also a grinding wheel, which can be used.

The finished reamer is in I ¹ I ^. 7 dar_.ee. Hast. The process steps for the production of this awl come close to the utmost possible efficiency and thereby create an arbitrarily reproducible accuracy. The reamer not only exhibits one inherent lack of complete concentricity, but such reamer can also be assessed at low cost.

Pateririiansi, ruche .

BATH ORIGINAL 80 9 802/0 3 92

Claims (3)

* Pa ΐ, _ £ _ϋ1 t _a_ii _ s_] 2 _ £ _ü_ c_ h_ e 1. Additional honor to the manufacturing part of £ ei., Vhleii or the like. under hardening of your reamer blank as well as this blank over ε-an entire JjIJIiQe to the desired Siiddurclimesser the reamer and grinding in ITuts in one end of the hollow, thereby _ekennzeiahnet that the hollow j..ng (12) first ground centerless Y.- (If'ig. 3) and the minutes are adjusted in the same way so that a longitudinal longitudinal web forming the outer edge of each edge remains (32 | of the acidity achieved in centerless grinding. 2. The method according to claim 1, characterized in that that a section of the reamer length extending a little into the grooved area creating a space for the chips to escape Ground to a smaller diameter (345 will. (Art. 7 S1, Paragraph 2, No. 1, Clause 3 of the Amendment Act of 4 » 9. 1887) 30S802 / 0392 ~ 3. The method according to iinspurch 1 or 2, characterized in that that before you harden each end of the reaming blank Czov ;. (12) provided with a shallow hole (10), which is after hardening and Grinding without training one centering each (42) in each end of the reamer must be sharpened concentrically "to the Enddui'chmeseer (Pig. 7). BAD ORiQiNAL 3QS802 / 0392