DD288345A5 - PROCESS FOR INTERNAL ROUND GRINDING OF HOLES AND SIMULTANEOUS INTRODUCTION OF LUBRICATING BAGS - Google Patents

Abstract

The invention relates to a method for internal cylindrical grinding of holes and simultaneous introduction of lubrication pockets in the holes. On a grinding table a angle-adjustable short oscillating device is arranged with grinding spindle, wherein the grinding body is geschraeg trained. The abrasive body is retracted axially in a known manner in the bore. Anschlieszend the abrasive body is delivered radially to the bore grinding. At the same time, a pulse is imparted periodically in coordination with the workpiece speed to the grinding body via the short oscillating device, axially to the grinding spindle axis. This process is repeatable until the desired number of pockets are inserted in the bore. {Internal cylindrical grinding machine; Bearings grinding; Career grinding; Pocket contribution; infeed; Kurzoszilliereinrichtung; Grinding table}

Description

1+

1+ workpiece spindle speed _ number of pockets

Axial pulse generator 1

For this 1 page drawings

Field of application of the invention

The invention finds application in the internal cylindrical grinding of plain bearings or plain bearing bushings and the simultaneous introduction of lubrication pockets.

Characteristic of the known state of the art

In many cases plain bushings are used with lubrication pockets, these lubrication pockets are usually milled. The grinding of the treads then takes place in a further operation. The disadvantage of this method is that in the hard transitions between the cylindrical part of the bore and the pockets of a wedge formation is difficult. In addition, the bag sizes and thus the load capacity are different as a result of the two workpiece clamping.

Object of the invention

The object of the invention is to provide a method in which the sharp transitions between the holes of plain bearings and the pockets are eliminated and the workpiece can be processed in one operation.

Explanation of the essence of the invention

The invention has for its object ^ to provide in processes in which the bores of plain bearings or

Gleit'agerbuchsen continuously ground inside and at the same time in a clamping lubrication pockets can be introduced by grinding in the holes.

According to the invention, this object is achieved as follows:

An already known short-stroke oscillating device is arranged angle-adjustable on a known grinding table, and the grinding body used is dressed obliquely. The grinding wheel is axially retracted in a known manner in the bore, then the grinding wheel is radially delivered to the bore grinding. At the same time, an impulse is imparted axially to the grinding spindle axis via the short stroke oscillating device in coordination with the workpiece speed.

The number of lubrication pockets can be selected on the circumference of the bore of the workpiece by the following relationship:

I ₊ -

Workpiece spindle speed _ Number of pockets of axial encoder 1

embodiment

Reference to an embodiment of the invention will be explained in more detail.

Fig. 1: shows a slide bearing and a grinding table with a Kurzoszillierschlitten Fig. 2: shows a bag in a raceway

On an internal cylindrical grinding machine, a grinding table 1 with a short-stroke oscillating device 2 arranged at an adjustable angle is arranged. The grinding wheel 3 is dressed obliquely. The grinding of the bore and the introduction of the pockets 4 takes place according to the following procedure.

The grinding wheel is axially retracted into the bore in a known manner, then the grinding wheel is radially fed to the bore grinding. At the same time, a pulse is imparted axially to the grinding spindle axis via the short-stroke oscillating device in coordination with the workpiece rotational speed and thus grinds the pockets into the bore.

example

Number of pockets = 3, workpiece speed 666 min " ¹ , circumference, pocket depth 0.1 mm, short-stroke oscillating device with a 2 mm constant stroke

At the desired depth of 0.1 mm, the short-stroke oscillating device 3 must be pivoted by a certain angle.

In a defined rear rest position of the Kurzhuboszilliereinrichtung 3 of the grinding table 2 moves with its obliquely abraded grinding wheel in the workpiece 5 and the Kurzhuboszilliereinrichtung 2 starts to oscillate with simultaneous workpiece delivery. The oscillation is z. B. caused by an already known cam, according to the

Transmission ratio between the speed of the workpiece spindle and the cam plate is formed in its length on the circumference. The pocket length depends on the design of the cam. In the example chosen, the speed ratio would be as follows:

I ₊ -

Workpiece spindle Number of bags 1,333 666,66min "'

Cam disk ~ 1 1 500min " ¹

Advantages of the invention

The advantages of the invention are that by this method in a workpiece in a single clamping pockets

arise whose transition to the bore is not sharp and the pockets are ground simultaneously.

Claims (2)

1. A method for internal cylindrical grinding of holes and simultaneous introduction of lubrication pockets in a clamping using a grinding table on which a angle adjustable Kurzhuboszilliereinrichtung is arranged and using an obliquely abraded abrasive body, characterized in that the grinding body (3) in a known manner in the bore is moved axially, that then the abrasive body (3) is radially delivered to the bore grinding, and that periodically in coordination with the workpiece speed of the grinding body (3) via the Kurzhuboszilliereinrichtung (2) impulse is imparted axially to the grinding spindle axis. 2. The method according to claim 1, characterized in that the number of lubrication pockets (4) at the periphery of the bore of the workpiece is selected by the following relationship: