DE9000403U1 - Grinding or similar tool coated with extremely hard abrasive grains - Google Patents

Description

15· January 1990 Q

Maschinen- und Zshnradreirik GmbH & Co 000.00 &EEacgr;&Ogr; / 2SO ^- * T f 1 /1 MooeaoherStr.ae, &bgr; Munich 4r ... ,, - «·->"/ «"J ^l JV*

Grinding or similar tool coated with extremely hard abrasive grains

The innovation concerns a grinding or similar tool covered with extremely hard screed grains in accordance with the generic term "Schützen" (shooting tool). It is expressly indicated on ^the third

pointed out that the terms used here and in the following

defined terms "grinding" and "grinding tool" in

j broadest sense x. are understood, ie d-ß especially

-•■.eh "Ho en", "Hartschabeu-, »£ -habachschleifen", "Abzieh" j "True" including the afor used

--jE ^e are to be understood by this. This also applies analogously to the term "extremely fine grinding grains", which is to be understood as diamond, CBN, tungsten carbide and similar grains, as are known in abrasive tools of the type mentioned, ie tools which do not have uniformly directed cutting edges.

State of the art

DE-OS 33 36 593 describes a tool coated with CBN grains for fine machining the tooth flanks of workpiece gears, in which the tooth flanks are ground. Grinding tooth flanks is extremely time-consuming and the tools coated with diamond grains used for this purpose are very expensive to purchase.

Task

The aim of the plan is to find the means and methods to achieve this, with the aim of _improving efficiency and reducing costs.

the grinding tool used for this should be simple and inexpensive to manufacture. In addition, the solution should also be applicable to other grinding and similar tools that are used in gear finishing,

i-solution

According to the Schu ⁺ claim, the solution to the problem consists primarily in the use of a known ceramic grinding tool as a base body for a grinding tool filled with extremely fine abrasive grains, whereby the abrasive grains are absorbed in its pores. The abrasive grains can be pressed in by hand with a simple tool, e.g. a spatula or the like, or with aids which will be discussed later.

drawing

The innovation is described below using two embodiments, which are shown in 3 figures.
Fig. 1 a plate-shaped grinding wheel in section,

Fig. 2 shows an enlarged detail of a tool manufactured according to the invention, and

Fig. 3 a gear-shaped grinding or similar tool.

!!<> very · i lniii y.

K i li f !.&rgr; I lcr form i ■<;' Shh! «■ i fs &igr; hfii bf ! (Fig. H an s K &ogr;&igr; mn ik M f< t f>ri;\ I is '/.um i nd c µgr; t nii( her ·· &igr; ei ti "ti St:i t'rinoi I "',', with ux Li'füll hui ton S eh L ei fkiiriie rn! bclegl . The front side 2 to be bonded is coated with a thin layer of adhesive and immediately afterwards the abrasive grains are 3. This can be done by sprinkling or by applying with a brush. Before the adhesive begins to harden, the grinding grains J are pressed against the grinding wheel. The wheels eifkiirner 3 ^into the pores 5 of the ceramic material 6 (Fig. 2), into which the adhesive 1 has already "sucked in". The pressing in of the grinding grains 3 can be carried out with a correspondingly shaped, not shown The adhesive can be applied with a pressure tool, but also by spreading it with a simple tool, e.g. a spatula, or in extreme cases even with a finger. The adhesive is then allowed to harden according to the manufacturer's instructions. For an adhesive based on epoxy resin, this can take 2 hours at about I50 C is

In order to be able to work with the grinding wheel according to Fig. 1, it is briefly dressed in the area of its outer contour, e.g. with a single-grain diamond dresser. With each dressing, new abrasive grains are exposed on the coated face 2, which then function as "cutting edges".

A gear-shaped tool 7 (Fig. 3) can have extremely hard abrasive grains applied to its tooth flanks in basically the same way. To do this, it only needs to be precisely aligned and ground precisely beforehand. To press in the abrasive grains 3, the tool 7 is rolled with a master wheel 8, as the abrasive grains 3 then protrude only slightly and evenly from the previously ground tooth flanks.

A grinding wheel coated with diamond grains as described above can be used both for grinding gear-like tools coated with CBN grains in accordance with DE-OS \) ~}G 5*^3 and for grinding particularly hardened workpiece gears. A grinding wheel coated with CBN grains is generally used for grinding hardened workpiece gears.

i Γ fs 1 i '·. I

1 ScIi Ir-L fs ch &ogr; L Il P 1 2 S t i rns ei t &eegr; from 3 Grinding grain &Iacgr; adhesive 5 Pore in (> o 6 Knramik-Mnt eri

7 gear I-shaped tool

8 Most people are cycling

Claims (1)

Protection? claim Grinding or similar tool coated with extremely hard abrasive grains (3) in the form of a round grinding disk (1) or a gear-, rack- or worm-shaped grinding or similar tool (7), characterized in that the abrasive grains (3) are received in the pores (5) of a grinding or similar tool serving as a base body, made of a ceramic material (6) and appropriately shaped and optionally reworked (stripped, ground) and are held in place with an adhesive (k) .