CN114173990B - Apparatus and method for external machining for cutting a workpiece - Google Patents
Apparatus and method for external machining for cutting a workpiece Download PDFInfo
- Publication number
- CN114173990B CN114173990B CN202080053530.6A CN202080053530A CN114173990B CN 114173990 B CN114173990 B CN 114173990B CN 202080053530 A CN202080053530 A CN 202080053530A CN 114173990 B CN114173990 B CN 114173990B
- Authority
- CN
- China
- Prior art keywords
- workpiece
- seat
- plastic cover
- tool
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003754 machining Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 15
- 238000005520 cutting process Methods 0.000 title claims description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
- B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/10—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Rolling Contact Bearings (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
An apparatus for external machining of a workpiece (4) by means of a geometrically undefined tool, comprising a seat (1) which is designed to press a rotationally symmetrical workpiece (4) onto a drive (7), wherein the seat (1) has a holding element (2) on which a rotary element (3) to be inserted into the workpiece (4) is supported by means of a rolling bearing (14), and wherein the rotary element (3) has a plastic cover (28) which is designed to contact the workpiece (4).
Description
Technical Field
The invention relates to a method for external machining of a workpiece by means of a geometrically undefined tool. The invention further relates to a device for forming a tool for carrying out such a machining method.
Background
DE 10 2009 040 062 A1 discloses a device for finishing annular workpieces, in particular bearing rings. The known device comprises a device for short-stroke honing, which has an oscillating drive for generating an oscillating movement of the honing stick holder. Furthermore, a tool holder is provided, which is provided to accommodate the hard rotary tool.
Another device for mechanically finishing a surface at a rotationally symmetrical workpiece is described in DE 10 2007 054 897 B4. The workpiece to be machined may be a bearing ring for a double row rocking roller bearing. The tool carrier of the known machining device can perform a short-stroke oscillating movement and a long-stroke oscillating movement by means of different drives.
The working of the inner surface by means of honing tools is described in DE 10 2011 087 074 A1. The honing tool includes honing sticks and additional stabilizing sticks.
DE 28,169 A1 describes a grinding or honing machine for machining raceways of rolling bearing rings, in which the outer or inner circumferential surface of the rolling bearing ring is machined.
A complete production line for manufacturing bearing assemblies is disclosed in WO 2017/028855 A1. The production line furthermore comprises a honing machine in the form of a vertical honing machine.
Disclosure of Invention
The invention is based on the object of providing an improved, in particular process-safe, external machining of a workpiece by means of a tool with an undefined geometry relative to the known prior art.
The object is achieved according to the invention by means of an apparatus for carrying out external machining of a workpiece having the features of claim 1. As such, the object is achieved by a method according to claim 6. The embodiments and advantages of the invention described below in connection with the processing method are also applicable to the processing device in terms of meaning and vice versa.
The machining device comprises a holder, that is to say a workpiece carrier, which is designed to press a rotationally symmetrical workpiece onto the drive, wherein the holder has a holding element on which a rotary element to be inserted into the workpiece can be supported by means of a rolling bearing, and wherein the rotary element has a plastic cover provided for contacting the workpiece.
By means of the seat, the workpiece, in particular the rolling bearing ring, is held during the grinding or honing process. Generally, the grinding or honing method comprises the steps of:
Providing a seat comprising a holding element and a rotating element which is mounted thereon in a rolling manner, wherein the rotating element has a metal can and a plastic cover which is mounted thereon,
Providing a workpiece to be treated, in particular a rolling bearing ring, said workpiece having a bore with a diameter which corresponds to the outer diameter of the plastic cover,
Providing a machining machine comprising a drive device configured as a rotary drive and a non-rotating tool with a geometrically undefined tool,
Inserting the seat into the hole of the workpiece so that the workpiece is held on the seat and simultaneously pressed onto the drive means,
-Machining the outer circumferential surface of the rotating workpiece by means of a non-rotating tool.
In particular, the cutting process is carried out in a force-controlled manner by means of honing sticks as tools.
The plastic cover is preferably designed such that the workpiece is held on the rotary element without play. By virtue of the flexible and at the same time friction advantageous properties of the material used for manufacturing the plastic cover, the risk of jamming when the seat and the workpiece are moved into each other is minimized compared to solutions in which a completely metallic bracket is inserted into the workpiece. At the same time, a particularly uniform pressing pressure distribution at the drive prevents the component from slipping or stopping during processing. In addition, the planar contact of the plastic cover on the workpiece principle precludes the deformation of the workpiece during processing.
By providing a plurality of different rotary elements which differ from one another with respect to the dimensioning of the metal can and the plastic cover or only with respect to the dimensioning of the plastic cover, different types of workpieces, in particular rolling bearing inner rings, can be finished on the same processing machine with a minimum of retrofitting effort.
In an advantageous embodiment of the seat, the metal can thereof has a flange, against which the flange of the plastic cover provided for contacting the workpiece rests. The axial forces can be transmitted over a large area to the annular workpiece via the flange of the metal can and the flange of the plastic cover.
The rolling bearing devices integrated into the seats are, for example, rows of ball bearing devices, in particular devices made up of four deep groove ball bearings. By means of a plurality of individual bearings, a particularly uniform rolling of the rotary element during processing is achieved. The rotational element comprising the plastic cover is almost or completely adapted to the rotational speed of the drive during the machining process. This is equivalent to the fact that during machining, in particular honing, no or little sliding movement occurs between the rotating element and the workpiece.
Drawings
Embodiments of the present invention are described in detail below with reference to the drawings. Wherein is shown:
figure 1 shows a cut-away perspective view of a seat provided for holding a rotatable workpiece,
Figure 2 shows in part a schematic view of the processing of a workpiece held by means of a seat,
Figure 3 shows a cross-section of the metal can of the seat,
Figure 4 shows a perspective view of the metal can,
Figure 5 shows a cross-section of the plastic cover of the seat,
Fig. 6 shows a perspective view of the plastic cover.
Detailed Description
Fig. 1 to 6 show, in full or in part, a device, referred to as a holder 1 as a whole, for holding a workpiece 4 during external machining of a cut of the workpiece with a geometrically undefined tool. In this case, the workpiece 4 is an inner ring of a rolling bearing. The edge of the inner ring 4 is denoted by 6 and the raceway for rolling elements, in particular rollers, is denoted by 5. The tool 8 for machining the raceway 5 comprises honing sticks 9.
The assembly of the seat 1 is a holding element 2 and a rotating element 3 supported on the holding element 2. The rotary element 3 is moved into the annular workpiece 4 for machining, wherein the workpiece 4 is pressed onto the drive 7. The axis of rotation of the drive 7 is identical to the central axis of the rotary element 3, indicated as M, and thus of the entire seat 1. The holding element 2 forms a connection section 10 to be inserted into a receptacle, not shown, a disk section 11 connected to the connection section 10, and a support section 12 connected to the disk section 11. The rotary element 3 is supported on a support section 12, which has a minimum diameter in all sections 10, 11, 12, by means of a rolling bearing device, indicated generally at 14.
The rotary element 3 consists of a metal can 13 and a plastic cover 28 placed onto the metal can 13. The rolling bearing device 14 for supporting the metal can 13 on the support section 12 comprises four ball bearings 15, 16, 17, 18, the inner rings of which are indicated with 19 and the outer rings of which are indicated with 20, respectively. Between a total of eight bearing rings 19, 20, four rows of balls 21 roll as rolling bodies. The rolling bearing 14 is thus an overall four-row bearing.
The metal can 13 has a hole 23 in its center in the bottom, indicated by 24, in which a head of a screw 22 is arranged, which screw is screwed into the support section 12. In the normal operation of the seat 1, a gap is formed between the head of the screw 22 and the wall of the hole 23, so that the whole rotating element 3 can rotate freely together with the metal can 13. The screw 22 has the function of a fastening element, which prevents, for example, pulling out of the assembly of the rolling bearing 14 from the bearing section 12 or overloading of the assembly of the rolling bearing 14 when the rotary element 3 is pulled out of the workpiece 4.
At the bottom 24 of the metal can 13, a cylindrical section 25 is connected, wherein a chamfer 33 is formed at the outer circumferential surface of the metal can 13 between the bottom 24 and the cylindrical section 25. At the open end face of the metal can 13 opposite the base 24, the metal can has a radially outwardly directed flange 26, that is to say a flange. A gap is formed between the end face denoted 27 of the disk section 11 and the flange 26 during normal operation of the seat 1. The outer diameter of the flange 26 corresponds in this embodiment to the outer diameter of the disk section 11. The wall thickness of the cylindrical section 25 is denoted W M in fig. 3.
Details of the plastic cover 28 that is placed onto the metal can 13 are shown in fig. 5 and 6. The bottom of the plastic cover 28 is indicated with 29 and the cylindrical section directly surrounding the metal can 13 in the assembled state is indicated with 30. A chamfer 31 is formed between the bottom 29 and the cylindrical section 30. At the open end side of the plastic cover 28, a flange 32 is present, which in the fully installed state comes to rest against the flange 26 of the metal can 13. The outer diameter of flange 32 corresponds to the outer diameter of flange 26. The wall thickness of the cylindrical section 30 of the plastic cap 28, denoted W K, is less than half the wall thickness W M of the metal can 13. If an axial force is applied by the rotary element 3 in the direction of the disk section 11 during operation of the seat 1, said force is transmitted by the outer ring 20 to the inner ring 19 via the rolling elements 21. The respective inner rings 19 of the ball bearings 15, 16, 17, 18 rest against each other. The movement of the inner ring 19 of the ball bearing 15, which is minimally spaced from the connecting section 10, is interrupted by an annular circumferential stop surface 34 at the bearing section 12. As a whole, the rolling bearing 14 extends in the axial direction, that is to say in the longitudinal direction of the central axis M over more than half the length of the rotary element 3 of multi-piece design measured in the same direction.
Description of the reference numerals
1 Seat 2 holding element 3 rotating element 4 work piece, outer ring 5 raceway 6 edge 7 driving means 8 tool 9 honing bar 10 connecting section 11 disk section 12 supporting section 13 metal can 14 rolling bearing means 15 ball bearing 16 ball bearing 17 ball bearing 18 ball bearing 19 inner ring 20 outer ring 21 ball 22 screw 23 hole 24 metal can bottom 25 metal can cylindrical section 26 metal can flange 27 disk section end face 28 plastic cap 29 plastic cap bottom 30 plastic cap cylindrical section 31 plastic cap chamfer 32 plastic cap flange 33 metal can chamfer 34 stop face M central axis W M metal can wall thickness W K plastic cap wall thickness.
Claims (7)
1. An apparatus for external machining of a workpiece (4) by means of a geometrically undefined tool, having a seat (1) which is designed to press a rotationally symmetrical workpiece (4) onto a drive (7), wherein the seat (1) has a holding element (2) on which a rotary element (3) to be inserted into the workpiece (4) is supported by means of a rolling bearing (14), and wherein the rotary element (3) has a plastic cover (28) which is provided for contacting the workpiece (4).
2. The apparatus according to claim 1,
It is characterized in that the method comprises the steps of,
The plastic cover (28) is mounted on a metal can (13) which is rotatable by means of the rolling bearing (14).
3. The apparatus according to claim 2,
It is characterized in that the method comprises the steps of,
The metal can (13) has a flange (26) at which a flange (32) of the plastic cover (28) provided for contacting the workpiece (4) is stopped.
4. The apparatus according to claim 1 to 3,
It is characterized in that the method comprises the steps of,
The rolling bearing (14) is configured as a multi-row ball bearing.
5. The apparatus according to claim 4,
It is characterized in that the method comprises the steps of,
The rolling bearing device (14) comprises four deep groove ball bearings (15, 16, 17, 18).
6. A method for external machining of a cut of a workpiece (4) by means of a geometrically undefined tool, having the steps of:
Providing a seat (1) comprising a holding element (2) and a rotating element (3) mounted thereon in a rolling manner, wherein the rotating element (3) has a metal can (13) and a plastic cover (28) mounted thereon,
Providing a workpiece (4) to be processed, said workpiece having a hole with a diameter compatible with the outer diameter of the plastic cover (28),
Providing a machining machine comprising a drive (7) configured as a rotary drive and a non-rotating tool (8, 9) having a geometrically undefined tool,
Inserting the seat (1) into the hole of the workpiece (4) so that the workpiece (4) is held on the seat (1) and simultaneously pressed onto the drive (7),
-Cutting the outer circumferential surface of the rotating workpiece (4) by means of said non-rotating tool (8, 9).
7. The method according to claim 6, wherein the method comprises,
It is characterized in that the method comprises the steps of,
The cutting process is carried out in a force-controlled manner by means of honing sticks (9) as tools.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019123338.0A DE102019123338B4 (en) | 2019-08-30 | 2019-08-30 | Device and method for external machining of a workpiece |
| DE102019123338.0 | 2019-08-30 | ||
| PCT/DE2020/100585 WO2021037299A1 (en) | 2019-08-30 | 2020-07-03 | Device and method for the external machining of a workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114173990A CN114173990A (en) | 2022-03-11 |
| CN114173990B true CN114173990B (en) | 2024-05-14 |
Family
ID=71670024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080053530.6A Active CN114173990B (en) | 2019-08-30 | 2020-07-03 | Apparatus and method for external machining for cutting a workpiece |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7293501B2 (en) |
| CN (1) | CN114173990B (en) |
| DE (1) | DE102019123338B4 (en) |
| WO (1) | WO2021037299A1 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4854191U (en) * | 1971-10-20 | 1973-07-12 | ||
| DE3437113A1 (en) * | 1984-09-17 | 1986-03-27 | Keller, René, Dr., Bern | DEVICE FOR GRINDING THE INTERIOR OR EXTERIOR OF A RING-SHAPED WORKPIECE |
| CN201070721Y (en) * | 2007-08-23 | 2008-06-11 | 洛阳轴研科技股份有限公司 | Non-metal material keeper mold of bakelite, synthetic resin special for lathe process |
| CN203548562U (en) * | 2013-10-24 | 2014-04-16 | 无锡诚石轴承有限公司 | Special single-row deep groove ball bearing for guide wheel of automobile door |
| CN104400644A (en) * | 2014-12-02 | 2015-03-11 | 常州市华贤五金厂 | Live center |
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- 2019-08-30 DE DE102019123338.0A patent/DE102019123338B4/en active Active
-
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- 2020-07-03 CN CN202080053530.6A patent/CN114173990B/en active Active
- 2020-07-03 JP JP2022513395A patent/JP7293501B2/en active Active
- 2020-07-03 WO PCT/DE2020/100585 patent/WO2021037299A1/en active Application Filing
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| JPS4854191U (en) * | 1971-10-20 | 1973-07-12 | ||
| DE3437113A1 (en) * | 1984-09-17 | 1986-03-27 | Keller, René, Dr., Bern | DEVICE FOR GRINDING THE INTERIOR OR EXTERIOR OF A RING-SHAPED WORKPIECE |
| CN201070721Y (en) * | 2007-08-23 | 2008-06-11 | 洛阳轴研科技股份有限公司 | Non-metal material keeper mold of bakelite, synthetic resin special for lathe process |
| CN105408206A (en) * | 2013-07-22 | 2016-03-16 | 舍弗勒技术股份两合公司 | Propeller blade mounting device |
| CN203548562U (en) * | 2013-10-24 | 2014-04-16 | 无锡诚石轴承有限公司 | Special single-row deep groove ball bearing for guide wheel of automobile door |
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| CN205184521U (en) * | 2015-12-10 | 2016-04-27 | 云南合信源机床有限责任公司 | Drive is top in peripheral milling |
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| CN207606571U (en) * | 2017-12-13 | 2018-07-13 | 天水星火机床有限责任公司 | A kind of mandrel for high-precision part processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114173990A (en) | 2022-03-11 |
| DE102019123338A1 (en) | 2021-03-04 |
| JP2022546075A (en) | 2022-11-02 |
| WO2021037299A1 (en) | 2021-03-04 |
| DE102019123338B4 (en) | 2022-06-15 |
| JP7293501B2 (en) | 2023-06-19 |
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