CN115151375A - Apparatus and method for centerless grinding - Google Patents
Apparatus and method for centerless grinding Download PDFInfo
- Publication number
- CN115151375A CN115151375A CN202180016855.1A CN202180016855A CN115151375A CN 115151375 A CN115151375 A CN 115151375A CN 202180016855 A CN202180016855 A CN 202180016855A CN 115151375 A CN115151375 A CN 115151375A
- Authority
- CN
- China
- Prior art keywords
- upper guide
- cover
- base body
- cooling lubricant
- grinding
- 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.)
- Pending
Links
- 238000000227 grinding Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 11
- 239000005068 cooling lubricant Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Images
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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
- B24B5/307—Means for supporting work
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
A device for upper guidance in centerless through grinding has a fluid channel (6), namely a cooling lubricant channel (6), which has an inlet opening (7) and a plurality of outlet openings (8).
Description
Technical Field
The invention relates to a device for upper guidance during centerless grinding, designed according to the preamble of claim 1. The invention further relates to a method for centerless grinding.
Background
Such an upper guide apparatus designed for use in centerless grinding is known from DD 242 020 A1. It is proposed here to guide the workpiece in the grinding gap at the top, as long as the gripper lowers the workpiece down and out of the grinding gap, wherein it is also possible to handle extremely thin workpieces in the grinding gap. The upper guide device according to DD 242 020 A1 has the shape of a curved track which is penetrated by a cavity. If a vacuum is generated in the cavity, the workpiece can be sucked thereby. Alternatively, pressure nozzles can be provided at the contact surfaces of the known upper guide devices which are designed to contact the workpiece, in order to guide the workpiece out of the support rail in the downward direction.
DD 116 779 A1 discloses a method and a regulating wheel for through grinding a drum-shaped cylinder on a centerless cylindrical grinding machine. The drum is machined in a grinding gap between the grinding wheel and a regulating wheel provided with a transport screw. The drum is guided through the grinding gap by a conveyor screw while changing its axial position in a plane extending through the grinding wheel axis.
The compact centerless grinding machine described in DE 10 2014 115 B3 comprises two driven spindles, namely a grinding spindle and a setting spindle, which are movable relative to one another and can be fed to a workpiece carrier.
One possible design of a support rail for a centerless grinding machine is described in detail in DE 10 2015 106 060 A1. The support rail on which the workpiece to be machined rests has a carrier rail and a workpiece support rail arranged on the carrier rail. By means of the tensioning element, the workpiece support rail can be tensioned on the carrying rail.
DE 10 2016 215 065 A1 describes a machine tool for grinding round bodies, which machine tool also makes it possible to separate tubular semifinished products by means of a grinding wheel.
DE 199 16 002 A1 discloses a device for supplying a grinding application point with a cooling lubricant. The device comprises a delivery nozzle, the nozzle opening of which rests against the circumferential surface of the grinding wheel while forming a narrow application gap.
Disclosure of Invention
The invention is based on the object of proposing an improved possibility for centerless grinding in relation to the prior art, which is characterized by a particularly high process reliability even in mass production conditions.
The object is achieved according to the invention by a device for upper guidance in centerless through grinding according to claim 1. The object is likewise achieved by a method for centerless grinding, i.e. through grinding, according to claim 9. The embodiments and advantages of the invention described below in connection with the grinding method are also applicable to the upper guide device in a corresponding manner and vice versa.
The upper guide device comprises at least one fluid channel which is designed as a cooling lubricant channel having an inlet opening and a plurality of outlet openings.
The upper guide device is thus a component with multiple utilization. Due to the integration of the cooling lubricant feed into the upper guide device, a reliable, targeted cooling lubricant guidance to the working area is possible even in narrow spatial relationships. By means of the plurality of outflow openings, the cooling lubricant can be distributed in a defined manner.
According to one possible embodiment, the outflow openings of the upper guide device are arranged in rows. Thereby, a fan or curtain is formed by the plurality of individual jets of cooling lubricant flowing out of the upper guide device, which is directed at the workpiece.
In a particularly slim design, the upper guide device has a planar base body and a cover screwed onto the base body, wherein at least one section of the cooling lubricant duct, in particular a majority of the cooling lubricant duct, is formed between the base body and the cover.
In a possible embodiment, the branched cooling lubricant duct is formed here by a recess in the base body and/or in the cover. The outlet opening arranged along a straight line can be located directly at the edge of the cover resting on the base body. For example, an outflow opening with a circular cross section can be formed by a recess with a semicircular contour, which is molded into the base body and the cover. It is also possible for the recess to be provided only in the base body or only in the cover, while the respective other part has a continuous, smooth edge.
Regardless of the geometry of the individual outflow openings, overall, for example, 40, 80 or more outflow openings are arranged in succession at short intervals, so that the cooling lubricant flowing out of the upper guide apparatus impinges in fact as a closed film on the workpiece to be machined.
According to one possible refinement, the cover covers only a part of the basic body of the upper guide device. In the region of the base body projecting laterally beyond the cover, there may be a fixing contour, in particular in the form of a fixing slit, which enables the upper guide device to be fixed in the surrounding structure. A particularly flexible adaptation to different ambient structures is possible in designs in which there are in each case one fixing slit on both sides of the cover, wherein a straight line running centrally through both fixing slits in the longitudinal direction defines a fixing axis which is arranged parallel to a straight line running through all outflow openings of the upper guide device.
The base body and the cover of the upper guide device are, for example, metal parts machined by cutting, in particular by milling. Shaped production methods, such as casting or powder metallurgy methods, are also contemplated for manufacturing the individual components of the upper guide apparatus.
Overall, the upper guide device enables integrated process cooling during centerless through grinding. Accordingly, a separate coolant nozzle at the device for upper guidance of the workpiece is no longer required.
Drawings
In the following, embodiments of the invention are explained in detail with reference to the drawings. Shown here are:
figure 1 shows a perspective view of a device for upper guidance in centerless grinding,
figure 2 shows a cross-sectional view of the basic body of the upper guide apparatus according to figure 1,
figure 3 shows a side view of the basic body,
figure 4 shows a further sectional view of the basic body,
figure 5 shows a side view of the base element of the upper guide device formed by the base body and the connection for the cooling lubricant,
figure 6 shows a perspective view of the arrangement according to figure 5,
figure 7 shows a side view of the cover of the upper guide device,
figure 8 shows a cross-sectional view of the lid,
figure 9 shows a top view of the cover,
fig. 10 shows a perspective view of the cover.
Detailed Description
The device, which is designated as a whole by reference numeral 1, is designed for upper guidance during centerless grinding. Regarding the principle function of the upper guiding device 1, reference is made to the prior art cited above.
The upper guide device 1 is formed from a planar base body 2, a likewise planar cover 3 and a connecting piece 5 for cooling the lubricant. The base body 2 with the attached connecting piece 4 is referred to as the base element 5 of the upper guide device 1. The fluid channel 6 for the cooling lubricant used during grinding, i.e. centreless through-grinding, is largely obtained by the cavity formed between the base body 2 and the cover 3. The supply of the cooling lubricant into the upper guide device 1 is effected via an inlet opening 7 in the connecting piece 4. The cooling lubricant flows out of the upper guide device 1 through a plurality of outflow openings 8.
The cover 3 is screwed with the base body 2. The hole in the lid 3 is indicated by 9 and the threaded hole in the base body 2 is indicated by 10. In the exemplary embodiment, the cover 3 is fastened to the base body 2 by means of a total of eighteen screws 11.
The cover 3 has a wide section 12 and a relatively narrow section 13 in a side view, wherein a transition section 14 is formed between the sections 12, 13. The inlet section, indicated by 15, of the fluid channel 6, starting from the connection piece 4, is formed by a recess in the base body 2 and is covered by the wide section 12 and the transition section 14 of the cover 3. The introduction section 15 transitions into a distribution section 16, which is located in several places on the cover 3Extending almost over the entire width. Width of cover 3B 3 The width of the basic body 2 is shown as B, which is the same as the width of the entire upper guide device 1 2 And (4) showing. Width B of cover 3 3 Greater than the total width B of the upper guide device 1 2 50% of the total.
The circumferential limiting contour formed by the base body 2, which includes the insertion section 15 and the dispensing section 16, is denoted by 17. In order to establish a fluid-tight connection between the base body 2 and the cover 3 at the limiting contour 17, sealing means known per se can be provided. The section of the limiting contour 17 is the lower edge 18 of the fluid channel 6. The term "lower edge" indicates a typical, but not the only possible, installation situation of the upper guide device 1. The lower edge of the lid 3 is indicated with 19. All outflow openings 8 are arranged in a single row on the lower edge 19, the outflow openings being formed by recesses in the cover 3. The line which comes to bear against the outflow opening 8 at the lower edge 19 is referred to as the reference line BG. Through the narrowly arranged outlet openings 8, the cooling lubricant in the form of a cooling lubricant curtain flows out of the upper guide device 1 virtually in a flat manner.
Close to the upper edge, indicated by 23, of the base body 2, said base body has two fixing slits 20, 21 for holding the upper guide device 1 in the surrounding structure. Height of the base body 2 is represented by H 2 Showing the height of the lid 3 by H 3 And (4) showing. D 2 Denotes the thickness, D, of the base body 2 3 Indicating the thickness of the cover 3. Overall, the upper guide device 1 has a narrow, planar design, which also enables applications in narrow available spaces, wherein at the same time a very good, defined supply of cooling lubricant during centerless grinding is achieved by the linearly arranged outflow openings 8. The fastening slits 20, 21 are each located in the extension of an elongated hole 22 which is arranged in the base body 2 above the narrow section 13 of the cover 3. A straight line running longitudinally through the two fixing slits 20, 21, also through the long hole 22, is referred to as the fixing axis BA and is spaced apart in parallel from the reference straight line BG.
Description of the reference numerals
1. Upper guide apparatus
2. Basic body
3. Cover
4. Connecting piece
5. Base element
6. Fluid passages, cooling lubricant passages
7. Input opening
8. Outflow opening
9. Hole(s)
10. Threaded hole
11. Screw with a thread
12. Wide section
13. Narrow section
14. Transition section
15. Introduction section
16. Dispensing section
17. Bounding contour
18. Lower edge of fluid channel
19. Lower edge of cover
20. Fixed slit
21. Fixed slit
22. Long hole
23. Upper edge
BA fixed axis
BG reference straight line
B 2 Width of basic body, total width
B 3 Width of the cover
D 2 Thickness of the basic body
D 3 Thickness of the cover
H 2 Height of the basic body
H 3 The height of the lid.
Claims (10)
1. A device for upper guidance in centerless grinding, the device having at least one fluid channel (6), characterized in that the fluid channel is configured as a cooling lubricant channel (6) having an inlet opening (7) and a plurality of outlet openings (8).
2. The upper guide apparatus according to claim 1, characterized in that the outflow openings (8) are arranged in rows.
3. The upper guide apparatus according to claim 2, characterized in that it comprises a planar base body (2) and a cover (3) screwed onto the base body, wherein at least one section of the cooling lubricant channel (6) is formed between the base body (2) and the cover (3).
4. The upper guide apparatus according to claim 3, characterized in that the outflow opening (8) is formed by a recess at an edge (19) of the cover (3) that rests on the base body (2).
5. The upper guide apparatus according to any one of claims 2 to 4, characterized in that it has at least 40 outflow openings (8) for cooling lubricant.
6. The upper guide apparatus according to any one of claims 2 to 5, characterized in that the cover (3) covers only a part of the base body (2).
7. The upper guide apparatus according to claim 6, characterized in that the basic body (2) has at least one fixing slit (20, 21) in its section protruding beyond the cover (3).
8. The upper guide apparatus according to claim 7, characterized in that a fixing axis (BA) is defined by two fixing slits (20, 21) provided on both sides of the cover (3), which fixing axis is provided parallel to a straight line (BG) passing through all outflow openings (8).
9. A method for centerless grinding, wherein a cooling lubricant is guided through an upper guide device (1) and directed at a workpiece in a plurality of individual jets issuing from the upper guide device (1).
10. A grinding method according to claim 9, characterized in that the planar cooling lubricant jet is formed by a plurality of individual jets.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020112633.6A DE102020112633A1 (en) | 2020-05-11 | 2020-05-11 | Device and method for centerless grinding |
| DE102020112633.6 | 2020-05-11 | ||
| PCT/DE2021/100351 WO2021228309A1 (en) | 2020-05-11 | 2021-04-16 | Device and method for centerless grinding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115151375A true CN115151375A (en) | 2022-10-04 |
Family
ID=75786873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180016855.1A Pending CN115151375A (en) | 2020-05-11 | 2021-04-16 | Apparatus and method for centerless grinding |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4149718A1 (en) |
| CN (1) | CN115151375A (en) |
| DE (1) | DE102020112633A1 (en) |
| WO (1) | WO2021228309A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD242020A1 (en) * | 1985-10-29 | 1987-01-14 | Leipzig Mikrosa Veb | DEVICE FOR CARRYING OVERLESS EXTERNAL ROUND GRINDING |
| JP2004202655A (en) * | 2002-12-26 | 2004-07-22 | Shigiya Machinery Works Ltd | Work grinding method with centerless grinding machine, centerless grinding machine and upper side blade used therefor |
| CN104589215A (en) * | 2015-02-02 | 2015-05-06 | 亚新科凸轮轴（仪征）有限公司 | Water nozzle for high-speed cam grinder |
| CN105290892A (en) * | 2015-10-29 | 2016-02-03 | 江苏吉星新材料有限公司 | Sapphire crystal bar external circle machining mechanism of centerless grinding machine |
| CN205765624U (en) * | 2016-07-01 | 2016-12-07 | 江苏罡阳股份有限公司 | Grinding machine cooling liquid injection apparatus |
| CN110802448A (en) * | 2019-11-02 | 2020-02-18 | 姚仿英 | Outer circle polishing equipment for tungsten steel bar and anti-bouncing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD116779A1 (en) | 1974-12-09 | 1975-12-12 | ||
| JP3787739B2 (en) | 1998-01-26 | 2006-06-21 | トヨタ自動車株式会社 | Machining equipment using cold air cooling |
| DE19916002A1 (en) | 1999-04-09 | 2000-10-12 | Schaudt Maschinenbau Gmbh | Cooling lubricant feeder comprises nozzle with orifice next to grinder disc contact point |
| DE102014115149B3 (en) | 2014-10-17 | 2016-01-21 | Schaudt Mikrosa Gmbh | Grinding machine, in particular compact designed centerless grinder |
| DE102015106060A1 (en) | 2015-04-21 | 2016-10-27 | Leistritz Produktionstechnik Gmbh | Support rail for a centreless grinding machine and centerless grinding machine with such a support rail |
| DE102016215065A1 (en) | 2016-08-12 | 2018-02-15 | Schaeffler Technologies AG & Co. KG | Machine tool for grinding at least one round body, grinding wheel for the machine tool and method |
-
2020
- 2020-05-11 DE DE102020112633.6A patent/DE102020112633A1/en active Pending
-
2021
- 2021-04-16 WO PCT/DE2021/100351 patent/WO2021228309A1/en unknown
- 2021-04-16 EP EP21723123.2A patent/EP4149718A1/en active Pending
- 2021-04-16 CN CN202180016855.1A patent/CN115151375A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD242020A1 (en) * | 1985-10-29 | 1987-01-14 | Leipzig Mikrosa Veb | DEVICE FOR CARRYING OVERLESS EXTERNAL ROUND GRINDING |
| JP2004202655A (en) * | 2002-12-26 | 2004-07-22 | Shigiya Machinery Works Ltd | Work grinding method with centerless grinding machine, centerless grinding machine and upper side blade used therefor |
| CN104589215A (en) * | 2015-02-02 | 2015-05-06 | 亚新科凸轮轴（仪征）有限公司 | Water nozzle for high-speed cam grinder |
| CN105290892A (en) * | 2015-10-29 | 2016-02-03 | 江苏吉星新材料有限公司 | Sapphire crystal bar external circle machining mechanism of centerless grinding machine |
| CN205765624U (en) * | 2016-07-01 | 2016-12-07 | 江苏罡阳股份有限公司 | Grinding machine cooling liquid injection apparatus |
| CN110802448A (en) * | 2019-11-02 | 2020-02-18 | 姚仿英 | Outer circle polishing equipment for tungsten steel bar and anti-bouncing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021228309A1 (en) | 2021-11-18 |
| EP4149718A1 (en) | 2023-03-22 |
| DE102020112633A1 (en) | 2021-11-11 |
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