GB2218362A - Grinding carriage mounting for grinding machine - Google Patents
Grinding carriage mounting for grinding machine Download PDFInfo
- Publication number
- GB2218362A GB2218362A GB8909441A GB8909441A GB2218362A GB 2218362 A GB2218362 A GB 2218362A GB 8909441 A GB8909441 A GB 8909441A GB 8909441 A GB8909441 A GB 8909441A GB 2218362 A GB2218362 A GB 2218362A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grinding
- friction
- grinding table
- double
- kent
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/40—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using ball, roller or wheel arrangements
-
- 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
- B24B41/02—Frames; Beds; Carriages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Machine Tool Units (AREA)
Description
2218362 GRINDING TABLE FOR HEAVY-DUTY INTERNAL CIRCULAR GRINDING MACHINES
This invention relates to a grinding table for heavy-duty internal circular grinding machines.
Grinding tables even of internal circular grinding machines are in general relatively long structures. firstly in order to achieve a good guiding ratio. and -10 secondly in order to protect the guide from soiling.
is In recent years, particularly with heavy-duty machines, for machining short, rotationally symmetrical components, there has been a change-over to shorter grinding tables with pretensioned anti-friction guides.
If these grinding tables are to be able to take optional heavy-duty electric grinding spindles or belt-driven heavy-duty spindles with their corresponding drives, they must have a relatively wide and level mounting surface. But the requirement for short, wide grinding tables can be fulfilled only to a limited extent with the known straight-line guide technology. Another disadvantage of the pretensioned anti-friction guides common hitherto on long as well as 1, short grinding tables is deformation of the grinding table mounting surface by the pretensioning forces during assembly. According to circumstances,, this requires regrinding of the mounting surfaces in the assembled position.
It is an object of the invention to provide a grinding table with a short, wide mounting surface.
According to the invention., there is provided a grinding table for heavyduty grinding machines,, characterised in that on a grinding table adjacent to a pretensioned double-prism anti-friction narrow guide, with a guiding ratio of the length (L) of the needle cage to the distance (b) between the double-prism anti-friction narrow guides of 4:1, is disposed an anti-friction flat guide.
An advantage of the preferred grinding table of the invention is that deformation of the mounting surface by pretensioning forces during assembly is avoided.
1 3 In the preferred embodiment,, the anti-friction guide for the grinding table consists of a pretensioned anti-friction flat guide and a pretensioned. double-prism anti-friction narrow guide with a guiding ratio of the length L of its needle cage to the distance b between the double-prism anti-friction narrow guides which is 4:1. The double-prism anti-friction narrow guide is arranged close under the grinding spindle axis and thus affords very high rigidity as well as precision of grinding. The anti-friction flat guide picks up unilateral mass distribution to the double prism anti-friction narrow guide, which results from the wide grinding table for the grinding spindle and the adjacent drive motor for belt-driven grinding spindles. Arrangement of the drive for the grinding table in alignment with the overall centre of gravity assists the high guiding precision of the grinding table guide and its dynamic behaviour.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which Figure 1 is a section through the grinding carriage guide of a grinding machine; Figure 2 is a plan view of a grinding machine, a belt-driven grinding spindle and adjacent drive motor; Figure 3 is a side view of the carriage unit of Figure 2; and Figure 4 is a front view of the machine of Figures 2 and 3 showing the arrangement of the centres of gravity of the various component parts of the grinding machine.
Referring to Figure 1, there is shown a grinding table 1 equipped with a double-prism shaped anti-friction narrow guide 2 and a pretensioned anti-friction flat guide 3 which are arranged parallel to the grinding spindle axis (not shown) adjacent to each other. The guiding ratio of the length L of needle cage 4 to the distance b between the prism guides of the double-prism anti-friction narrow guide 2 is 4:1 (see Figures 3 and 4). The double-prism anti-friction narrow guide 2 is arranged close to and beneath the axis of rotation 5 of the grinding spindle 6. It thus affords high rigidity and precision guiding.
3 1 P The anti-friction flat guide 3 picks up the unilateral mass distribution to the double-prism anti-friction narrow guide 2, which arises in the case of belt-driven grinding spindles if, adjacent to the grinding spindle 6, the drive motor 7 is likewise arranged parallel to the grinding axis.
From Figure 4, it can be seen that the grinding table 1 and the grinding table drive 8 are arranged in such a way that the overall mass centre of gravity SgeS of the grinding table 1 with its grinding spindle 6 and drive motor 7 are vertically aligned above and in the direction of guiding with the centre of the grinding table drive 8. This guiding system has the advantage over prior art evices of allowing extremely short, wide grinding tables with higher guiding precision and higher static and dynamic rigidity. Deformation of the grinding table mounting surface by the pretensioning forces therefore does not occur.
Claims (3)
- CLAIMS is 1. A grinding table for heavy-duty grinding machinescharacterised in that an antifriction flat guide is disposed on the grinding table adjacent to a pretensioned double-prism anti-friction narrow guide, including a needle cage having a length (L) and a pair of narrow guides spaced apart by a distance (b), the guiding ratio of said double-prism anti-friction guide with respect to the length (L) of the needle cage to the distance (B) between the double-prism-anti-friction narrow guides being 4:1.
- 2. A grinding table according to claim 1, wherein the grinding table includes a table drive whose point of application is arranged in alignment with the overall centre of gravity (SgeS) of the grinding table and a grinding spindle and drive motor when mounted thereon.S.1
- 3. A grinding table for heavy-duty grinding machines substantially as herein described with reference to the accompanying drawings.Published 1989 at The Patent Office. State House, 66-71 High Holborn, London WCIR 4TP.FinLher copies maybe obtained from The Patent OMce.Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1/87 Sales Branch. St Marv Crav. OrDinmon. Kent BR5 3RD. Printed b-v MUltiDlex techniques ltd, St Mary Cray, Kent, Uon. 1/57
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD31571388A DD271871A1 (en) | 1988-05-12 | 1988-05-12 | SLIDING TABLE FOR HIGH PERFORMANCE GRINDING MACHINES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8909441D0 GB8909441D0 (en) | 1989-06-14 |
| GB2218362A true GB2218362A (en) | 1989-11-15 |
Family
ID=5599213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8909441A Withdrawn GB2218362A (en) | 1988-05-12 | 1989-04-25 | Grinding carriage mounting for grinding machine |
Country Status (4)
| Country | Link |
|---|---|
| DD (1) | DD271871A1 (en) |
| DE (1) | DE3908635A1 (en) |
| FR (1) | FR2631272A1 (en) |
| GB (1) | GB2218362A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE891042C (en) * | 1941-07-08 | 1953-09-24 | Hanns Fickert | Slide guide for machine tools |
| US3311426A (en) * | 1959-11-12 | 1967-03-28 | Jack N Binns | Recirculating bearing arrangement |
-
1988
- 1988-05-12 DD DD31571388A patent/DD271871A1/en not_active IP Right Cessation
-
1989
- 1989-03-16 DE DE19893908635 patent/DE3908635A1/en not_active Withdrawn
- 1989-04-25 GB GB8909441A patent/GB2218362A/en not_active Withdrawn
- 1989-05-09 FR FR8906050A patent/FR2631272A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DD271871A1 (en) | 1989-09-20 |
| DE3908635A1 (en) | 1989-11-16 |
| GB8909441D0 (en) | 1989-06-14 |
| FR2631272A1 (en) | 1989-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |