JP2023500139A - Honing tool and method for machining bearing components - Google Patents

Abstract

The invention comprises a first straight section (17), two sections (23, 24) connected to the first section and positioned obliquely with respect to the first section, and a two transition sections (27, 28) adjacent to (23, 24) and arranged in a plane parallel to the first section (17) and spaced from the first section (17); , open end sections (31, 32) leading from transition sections (27, 28), said end sections comprising , directed to a plane parallel to said plane and in which the first section (17) of the lubricant duct (16) lies, in particular for a honing tool (3) for machining a bearing part .

Description

The present invention relates to a honing tool that allows cooling lubricant to be supplied to the workpiece. The invention further relates to a method for machining bearing components, in particular wheel bearings, by honing.

A honing tool is known, for example, from DE 33 36 626 A1. Known honing tools are provided for connection to a source of pressurized honing oil. Honing oils are intended to wash wear away from the working surface of the honing wheel.

Another honing device including a supply duct for cutting fluid is disclosed in CN202399128U. A supply duct for cutting fluid has an inlet and a double outlet.

A device known from DE 10 2009 040 062 A1 for finishing ring-shaped workpieces, in particular bearing rings, comprises a device for short-stroke honing with an oscillating drive for generating an oscillating movement of a honing wheel holder. Further provided is a tool holder designed to accommodate a hard turning tool.

A further device for the mechanical finishing of surfaces of rotationally symmetrical workpieces is described in DE 10 2007 054 897 B4. The workpiece to be machined can be a bearing ring for a double row spherical roller bearing. Tool carriers of known machining devices can utilize various drives to perform both short-stroke and long-stroke oscillatory motions.

The present invention is based on the object of achieving an advance over the cited prior art with respect to efficient and process-reliable production, especially when honing bearing components such as wheel bearing elements.

According to the invention, this object is achieved by a honing tool with the features of claim 1 . This object is also achieved by a method according to claim 7 for machining, i.e. honing, bearing parts, in particular wheel bearings. The features and advantages of the invention described below in relation to machining methods also apply equally to honing tools, and vice versa.

The honing tool has a first straight section, two sections connected to the first section and positioned obliquely with respect to the first section, and adjacent to the obliquely positioned sections. , two transition sections arranged in a plane parallel to the first section and spaced from the first section; An end section follows from the transition section, said end section being parallel to said plane defined by the position of the transition section and oriented parallel to the plane in which the first section of the lubricant duct lies. linearly oriented. The term transition section was chosen for the purpose of distinguishing it from other sections of the lubricant duct and does not imply any information about deviations in the geometrical design of the transition section.

This design of the lubricant duct in the honing wheel holder, which represents a fork shape, particularly facilitates the mounting of the honing wheel in the honing wheel holder for honing both rolling bearing raceways of the outer ring of wheel bearings for automobiles. One and the same honing tool can be used without modification. As regards the movement during machining of the honing tool and the workpiece or bearing part, in particular the wheel bearing outer ring, in principle a common process can be implemented during honing.

Generally, the honing process is
- providing a bearing component, in particular a wheel bearing, i.e. a one-piece outer ring, through which two raceways for the rolling elements are formed;
- providing a honing tool formed from a crank-like holder and a honing wheel fixed therein, the longitudinal direction of the holder being given by the shaft of the holder, the honing wheel being aligned with the longitudinal direction of the holder; designed as an elongated rectangular parallelepiped with right angles, the holder is traversed by a lubricant duct that branches off in the holder, the outlet opening of the lubricant duct being arranged next to the honing wheel;
- Machining the first raceway of the outer ring with a honing tool, wherein a cooling lubricant passes through the lubricant duct and is directed longitudinally of the honing wheel onto the surface being machined; machining;
- Machining the second raceway of the outer ring with a honing tool, likewise cooling lubricant is passed through the lubricant duct and directed longitudinally onto the honing wheel onto the surface being machined. and machining.

The "elongated rectangular parallelepiped" designation associated with honing wheels refers to the basic shape of the honing wheel. Especially in the machining area, the shape of the honing wheel can deviate from a rectangular parallelepiped shape.

With regard to the design of the outer race of wheel bearings, reference is made, for example, to DE 10 2009 051 930 A1. Wheel bearings with more than two rows of rolling elements can also be machined with honing tools, for example as disclosed in DE 10 2010 055 405 A1.

The crank-like shape of the honing wheel holder, which is critical to its usefulness for honing both raceways of commercial wheel bearings, is the overall shape of the honing wheel holder, and the partial split running into the honing wheel holder. is evident in both the route of the lubricant ducts. The honing wheel is preferably fixed to the honing wheel holder between two transition sections of the lubricant duct lying in a common plane and parallel to the first section. A pressure block, which is arranged in the honing wheel holder and can be adjusted with a screw mechanism, is particularly suitable for fixing the honing wheel.

The two end sections of the lubricant duct, from which the cooling lubricant used for honing emerges, are generally aligned longitudinally of the honing wheel and thus across the shaft of the honing wheel holder. The first straight section of the lubricant duct, ie the section running in the shaft, is usually longer than any other section of the lubricant duct. In contrast, the two end sections are preferably the shortest sections of the lubricant duct.

The two obliquely positioned sections are preferably connected to the first section via a transverse section oriented perpendicular to the first section. As far as the production of the honing wheel holder is concerned, in a manner which is advantageous from the point of view of production technology, the transverse section, like the two obliquely positioned sections, is closed by screws on one side.

The honing tools are sequentially attached and partially inserted into the outer ring from the same end face of the outer ring to machine the first raceway of the outer ring and to machine the second raceway of the outer ring. It can be used particularly efficiently in that it can be Machined bearing parts, especially for wheel bearings, are usually rolling bearings designed as double-row ball bearings.

In the following, exemplary embodiments of the invention are explained in more detail by means of drawings.

1 shows a honing wheel holder of a honing tool in perspective view; FIG. 1 shows a honing wheel holder in cross-section. 1 shows the machining of a wheel bearing outer ring with a honing tool in a first machining stage; 2 shows the machining of a wheel bearing outer ring with a honing tool in a second machining stage;

A honing tool, generally identified by the reference numeral 3, is provided for machining a workpiece 2, ie a wheel bearing outer ring. The arrangement sketched in FIGS. 3 and 4 and including the workpiece 2 , ie the wheel bearing component, and the honing tool 3 is collectively referred to as machining arrangement 1 . Also shown in FIG. 3 is a pressure roller 6 which absorbs radial forces.

The workpiece 2 to be machined has a flange 4 which is connected to the wheel carrier when the wheel bearing is installed. The bore of flange 4 is indicated at 5 . The flange 4 is integrally connected to a cylindrical section 12 machined using a honing tool 3, in which a first raceway 10 and a second raceway 11 are formed. In the completed state of the wheel bearing, the balls roll as rolling bodies on the raceways 10, 11 in a manner known per se. Overall, the wheel bearing, including the wheel bearing part 2, is designed as a double row angular roller bearing with O configuration. As regards the basic construction of such wheel bearings, reference is made to the prior art cited at the outset.

The honing tool 3 comprises a honing wheel holder 7, shown in isolation in FIGS. 1 and 2, also referred to as holder for short. When using the honing tool 3 , a pressure block 9 is utilized to secure the honing wheel 8 to the holder 7 . The honing wheel holder 7 is traversed by a duct, generally indicated at 16, which is partially divided into two arms, ie a lubricant duct, discussed in more detail below.

Cooling lubricant 13 , also referred to as lubricant for short, is used for honing and passes through duct 16 . Lubricant 13 is introduced into straight long section 17 of duct 16 via connecting piece 18 . A first straight section 17 of the duct 16 passes through the shaft 15 of the honing wheel holder 7 . The shaft 15 joins the extension section 19 at its end opposite the connecting piece 18 . In this extension section 19 there is a transverse duct 20 adjacent to the first section 17 and also assigned to the duct 16 . The ends of the transverse duct 20 are connected to oblique ducts 23, 24 which extend obliquely from the area of the holder 7, formed from the shaft 15 and the extension section 19 connected thereto. located in the middle section 22 that bends to the

The transverse duct 20 , also called transverse section, is designed as a blind hole closed by a screw 21 on the side of the holder 7 . In a corresponding manner, the two oblique ducts 23, 24, i.e. obliquely positioned sections of the lubricant duct 16, are closed by screws 25,26.

The obliquely positioned sections 23,24 each merge into a straight short section 27,28 shortly before the screws 25,26. The two straight short sections 27, 28, also called transition sections, define a plane arranged parallel to the plane in which the first straight section 17 of the duct 16 lies. Each short section 27, 28 is closed by a screw 29, 30, which is arranged on the underside of the honing wheel holder 7 on the basis of the arrangement according to FIG.

Above the screws 29,30 one end section 31,32 diverges from the straight short section 27,28 at right angles. The cooling lubricant 13 emerges from the end sections 31, 32 so as to be supplied along the honing wheel 8 to the machining area. The two machined areas in the form of raceways 10, 11 are separated from each other by a central inner wall area 14. FIG. The crank-like shape of the honing wheel holder 7, including the lubricant duct 16, allows each raceway 10, 11 to be reached from the same end face of the workpiece 2, the lubricant 13 being in each case supplied to each machining area in a squeezed fashion.

1 machining arrangement 2 bearing part, workpiece 3 honing tool 4 flange 5 bore 6 pressure roller 7 holder, honing wheel holder 8 honing wheel 9 pressure block 10 first raceway 11 second raceway 12 workpiece cylindrical section 13 lubricant 14 central inner wall region 15 shaft 16 duct, lubricant duct 17 straight long section 18 connector 19 extension section 20 lateral duct, transverse section 21 screw 22 intermediate section 23 obliquely positioned section of duct 24 duct 25 screw 26 screw 27 straight short section, transition section 28 straight short section, transition section 29 screw 30 screw 31 end section 32 end section

Claims (8)

A first straight section (17), two sections (23, 24) connected to said first section and positioned obliquely with respect to said first section, and these sections (23 , 24) and arranged in a plane parallel to said first section (17) and spaced from said first section (17); and , open end sections (31, 32) leading from said transition sections (27, 28), said A honing tool (3) whose end section is arranged parallel to said plane and directed to the plane in which said first section (17) of said lubricant duct (16) lies. A honing wheel (8) is positioned between said two transition sections (27, 28) of said lubricant duct (16) lying in a common plane and parallel to said first section (17), said honing wheel (8). A honing tool (3) according to claim 1, characterized in that it is fixed to a grinding wheel holder (7). Honing tool according to claim 2, characterized in that the two end sections (31, 32) of the lubricant duct (16) are oriented in the longitudinal direction of the honing stone (8). 3). Claims 1-, characterized in that said first section (17) represents the longest section and said two end sections (31, 32) represent the shortest sections of said lubricant duct (16). 4. A honing tool (3) according to any one of Claims 3 to 4. Said two obliquely positioned sections (23, 24) enter said first section (17) via a transverse section (20) oriented perpendicular to said first section (17). Honing tool (3) according to any one of the preceding claims, characterized in that it is connected. Claim 5, characterized in that said transverse section (20) and said two obliquely positioned sections (23, 24) are each closed on one side by screws (21, 25, 26). A honing tool (3) according to . A method for machining a bearing component (2), in particular a wheel bearing, comprising:
- providing the bearing part (2), i.e. the outer ring, through which two raceways (10, 11) for the rolling elements are formed;
- providing a honing tool (3) formed from a crank-like holder (7) and a honing wheel (8) fixed therein, the longitudinal direction of said holder (7) provided by the shaft (15) of (7), said honing stone (8) being designed as an elongated rectangular parallelepiped perpendicular to said longitudinal direction of said holder (7), said holder (7) (7) traversed by a branching lubricant duct (16), the outlet opening of said lubricant duct (16) being located next to said honing wheel (8). When,
- machining the first raceway (10) of the outer ring (2) with the honing tool (3), a cooling lubricant (13) passing through the lubricant duct (16), machining, wherein the longitudinal direction of the honing wheel (8) is directed onto the surface being machined;
- machining the second raceway (11) of said outer ring (2) with said honing tool (3), also cooling lubricant (13) passing through said lubricant duct (16); and said machining directed in said longitudinal direction of said honing stone (8) onto said surface being machined. During the honing of the first raceway (10) and during the honing of the second raceway (11), the honing tool (3) engages the outer ring (2) from the same end face. 8. A method according to claim 7, characterized in that:

Images