US20210114169A1 - Grinding device - Google Patents
Grinding device Download PDFInfo
- Publication number
- US20210114169A1 US20210114169A1 US17/047,586 US201917047586A US2021114169A1 US 20210114169 A1 US20210114169 A1 US 20210114169A1 US 201917047586 A US201917047586 A US 201917047586A US 2021114169 A1 US2021114169 A1 US 2021114169A1
- Authority
- US
- United States
- Prior art keywords
- nozzle
- grinding
- air
- accordance
- pressure
- 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 84
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims 8
- 238000007664 blowing Methods 0.000 claims 1
- 238000003801 milling Methods 0.000 description 8
- 239000005068 cooling lubricant Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- 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
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/07—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table
- B24B7/075—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table using a reciprocating grinding head mounted on a movable carriage
Abstract
Description
- This application is a United States National Phase Application of International Application PCT/DE2019/100336, filed Apr. 12, 2019, and claims the benefit of priority under 35 U.S.C. § 119 of
German Application 10 2018 109 804.9, filed Apr. 24, 2018, the entire contents of which are incorporated herein by reference. - The present invention pertains to a device for grinding a continuously cast product, in particular a slab, a billet or a block, with at least one grinding wheel, which is operated in a rotating manner and is fastened to a grinding head.
- Semifinished products made of steel, in particular in the form of steel slabs, which are manufactured in a slab continuous-casting plant, can be processed with such grinding devices. Such slabs are, as a result, cuboid. The slab coming from the casting operation has production-related surface defects, which are, for example, in the form of grooves, furrows, cracks or other undesired inclusions.
- Various processes, such as scarfing, milling or grinding are proposed for surface processing.
- Scarfing has the drawback that melted-off material cannot again be melted down without treatment because of the high oxygen content. A surface treatment by means of milling is therefore proposed in EP 2 032 285. As a drawback in this case, hot milling chips develop, which have to be conveyed away from the work area. In addition, the plain-milling cutters or face-milling cutters used have to be cooled in order to prevent overheating of the milling cutters, which would lead to a considerable wear. Cooling lubricants are used for cooling, which make an immediate further processing of the removed chips impossible. Before such chips are melted down again, they have to be washed and be separated from the cooling lubricants; the cooling lubricant has to be disposed of separately as hazardous waste.
- It has been mentioned in this connection that conveying away of the chips can be supported by aids such as an air blower or a water jet, which are arranged behind the milling station. There is the risk during the grinding that dust or other undesired particles that adhere to the surface are pressed into the ground surface during the grinding, which minimizes the quality of the ground surface. Exhaust units or admissions of cooling water help only to a limited extent.
- The present invention pertains to both surface grinding operations, in which the grinding wheel is moved back and forth in an oscillating manner vertically to the direction of feed of a slab, and such grinding devices, in which a grinding arm with a grinding tool fastened at the end is oriented with its longitudinal axis and with an acute angle on the order of between 25° to about 65° to the rotation axis of the grinding wheel. Such devices are described, for example, in DE 101 48 183 A1. The object of the present invention is to provide a grinding device, which performs a grinding operation leading to an improved surface quality.
- This object is accomplished by a device which is characterized in that at least one high-pressure air nozzle that clears particles adhering to or lying on the surface of the continuously cast product before the grinding operation is arranged on the grinding head. The advantage of such a grinding device is that dust particles, metal splinters or other adhering particles are removed before the grinding stone reaches the processing zone in question. In particular, ground-down particles, which are harder than (slab) steel, are blown away from the grinding wheel, as a result of which these particles are not pushed into or pressed into the slab surface during the grinding. The high-pressure air nozzle or nozzles is/are integrated with the grinding head, so that due to this mounting, the distance of the grinding wheels to the high-pressure air nozzle and the direction of spraying thereof can be set in a fixed manner and remains unchanged even in case of a movement of the head for guiding the grinding wheel. Special disposal problems such as in case of the use of cooling lubricants or other liquids or structurally complicated devices for collecting liquid coolant are not necessary. The surface quality of the material to be ground being treated can be improved considerably due to the clearing of the semifinished product surface before the grinding. In contrast to milling operations in which chips accumulate which then have to be disposed of, the blown-away grinding dust can be disposed of in a considerably easier manner, for example, by suction.
- According to another embodiment of the present invention, two or more high-pressure air nozzles are arranged on the grinding head on both sides of the grinding wheel or of each grinding wheel, so that at least one high-pressure air nozzle, which blows away particles before the grinding operation, can be operated in case of a change in grinding direction. In this manner, a grinding operation which moves back and forth in an oscillating manner is also possible without retrofitting the grinding head. The application of pressure during the grinding can take place by means of the same control that also introduces the change in direction during the grinding. Existing high-pressure air nozzles can be fed alternately from one and the same compressed air source.
- Not only the particles lying on or adhering to the surface in front of the grinding wheel, but also the grinding dust developing during the grinding, can preferably be immediately blown away by using a flat blast nozzle.
- The pressures used are preferably at least 2 bar (2×105 Pa), in particular between 5 bar and 120 bar (5×105 Pa to 12×106 Pa). According to another embodiment of the present invention, the air outlet velocity at the nozzle is at least 100 m/sec, preferably more than 200 m/sec.
- An exemplary embodiment of the present invention is shown in the drawings. The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
- In the drawings:
-
FIG. 1 is a schematic diagram for showing the grinding treatment of a slab known according to the state of the art; -
FIG. 2 is a schematic diagram according to the present invention with an additionally used high-pressure air nozzle; -
FIG. 3 is a schematic view of a first embodiment of a grinding head with a grinding wheel as well as with a single nozzle; and -
FIG. 4 is a schematic view of a second embodiment of a grinding head with a grinding wheel and with two mounted high-pressure air nozzles. - Referring to the drawings, along the arrow 12 in the example shown until the grinding operation has been performed over the entire length of the slab. The
slab 11 is then moved forward in the vertical direction towards the longitudinal axis in order to pass through the next grinding path in the direction of the longitudinal axis. - Remaining grinding particles or metal particles or dust particles as well as defect inclusions on the slab surface are shown by
reference number 13. - According to the present invention and as can be seen in
FIG. 2 , the slab is moved in the direction of the arrow 12 during the grinding operation. Thestationary grinding wheel 10 is located on a grinding head, not shown, which is additionally used as a holder for anozzle 14, which is flattened toward the front side and forms a nozzle slot, from which air flows under high pressure. The air stream is directed such that it blows away particles and dust lying in front of the grinding wheel as well as grinding dust that is generated by the grinding operation during the abrasion of the grinding wheel. - As can be seen in
FIG. 3 , thegrinding wheel 10 as well as the high-pressure air nozzle 14 are fastened to a grindinghead 15. - The relative direction of forward motion of the grinding head in relation to the
slab 11 is identified by thearrow 16. - The embodiment according to
FIG. 4 differs from the embodiment described above in that two high-pressure air nozzles wheel 10 and which are operated alternatingly, so that the movements of the grinding wheel in relation to the slab take place in two directions (see double arrow 17). Compressed air is applied to each high-pressure air nozzle, which in a slightly offset manner clears unprocessed grinding areas as well as developing grinding dust. The exiting air flow is identified byreference number 18. - While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (18)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018109804.9 | 2018-04-24 | ||
DE102018109804.9A DE102018109804A1 (en) | 2018-04-24 | 2018-04-24 | grinder |
PCT/DE2019/100336 WO2019206365A1 (en) | 2018-04-24 | 2019-04-12 | Grinding device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20210114169A1 true US20210114169A1 (en) | 2021-04-22 |
Family
ID=66349217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/047,586 Pending US20210114169A1 (en) | 2018-04-24 | 2019-04-12 | Grinding device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210114169A1 (en) |
EP (1) | EP3784433A1 (en) |
CN (1) | CN111757791A (en) |
DE (1) | DE102018109804A1 (en) |
WO (1) | WO2019206365A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB973575A (en) * | 1961-09-01 | 1964-10-28 | Coventry Gauge & Tool Co Ltd | Improvements in grinding |
DE19526280A1 (en) * | 1995-07-19 | 1997-01-23 | Schloemann Siemag Ag | Grinding device |
US6083084A (en) * | 1998-01-26 | 2000-07-04 | Toyota Jidosha Kabushiki Kaisha | Machining apparatus and process using cold gas stream, and cold gas stream cooling device and method for centerless grinder |
US6669532B1 (en) * | 1997-12-24 | 2003-12-30 | Toyota Jidosha Kabushiki Kaisha | Device and method for cool air cooling type machining |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3322037A (en) * | 1964-05-25 | 1967-05-30 | Torrington Mfg Co | Chip exhaust system |
JPS6279964A (en) * | 1985-09-30 | 1987-04-13 | Nippon Stainless Steel Co Ltd | Grinding chips removing apparatus in grinding steel strip ear part |
JP2000033570A (en) * | 1998-05-12 | 2000-02-02 | Mitsubishi Heavy Ind Ltd | Ground chip collecting device |
TW386926B (en) * | 1998-11-25 | 2000-04-11 | Ecoreg Ltd | A processing method and its atomizing supply device |
DE10148183A1 (en) | 2001-09-28 | 2003-04-17 | Evertz Egon Kg Gmbh & Co | Device for grinding a semi-finished product, especially in the form of steel slabs comprises a grinding arm having a longitudinal axis, a drive unit arranged on the grinding arm, and a grinding disk arranged as a grinding tool on the arm |
DE102007022929A1 (en) * | 2006-05-26 | 2007-12-20 | Sms Demag Ag | Apparatus and method for producing a metal strip by continuous casting |
DE102007022930A1 (en) * | 2006-05-26 | 2007-12-20 | Sms Demag Ag | Apparatus for producing a metal strip by continuous casting |
JP4867789B2 (en) * | 2007-05-24 | 2012-02-01 | Jfeスチール株式会社 | Hot slab surface layer care method and hot rolled steel manufacturing method |
JP4845834B2 (en) * | 2007-08-21 | 2011-12-28 | 株式会社ネオス | Method for preventing chip adhesion to the glass surface during glass processing |
CN102085634B (en) * | 2009-12-02 | 2014-01-22 | 鸿富锦精密工业(深圳)有限公司 | Polisher |
CN103231310B (en) * | 2013-05-15 | 2015-03-25 | 青岛理工大学 | Supply system for sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium |
CN203712397U (en) * | 2014-02-18 | 2014-07-16 | 太原晋西春雷铜业有限公司 | Air purging device for milling scraps of copper and copper alloy strip plates |
CN105538063A (en) * | 2015-12-02 | 2016-05-04 | 苏州莱测检测科技有限公司 | Self-cleaning polishing equipment |
CN205290690U (en) * | 2016-01-05 | 2016-06-08 | 广州市铭芯自动化控制设备有限公司 | Grinding wheel assembly is used in machine part processing with self test function |
-
2018
- 2018-04-24 DE DE102018109804.9A patent/DE102018109804A1/en active Pending
-
2019
- 2019-04-12 WO PCT/DE2019/100336 patent/WO2019206365A1/en unknown
- 2019-04-12 CN CN201980015395.3A patent/CN111757791A/en active Pending
- 2019-04-12 US US17/047,586 patent/US20210114169A1/en active Pending
- 2019-04-12 EP EP19720770.7A patent/EP3784433A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB973575A (en) * | 1961-09-01 | 1964-10-28 | Coventry Gauge & Tool Co Ltd | Improvements in grinding |
DE19526280A1 (en) * | 1995-07-19 | 1997-01-23 | Schloemann Siemag Ag | Grinding device |
US6669532B1 (en) * | 1997-12-24 | 2003-12-30 | Toyota Jidosha Kabushiki Kaisha | Device and method for cool air cooling type machining |
US6083084A (en) * | 1998-01-26 | 2000-07-04 | Toyota Jidosha Kabushiki Kaisha | Machining apparatus and process using cold gas stream, and cold gas stream cooling device and method for centerless grinder |
Also Published As
Publication number | Publication date |
---|---|
DE102018109804A1 (en) | 2019-10-24 |
EP3784433A1 (en) | 2021-03-03 |
WO2019206365A1 (en) | 2019-10-31 |
CN111757791A (en) | 2020-10-09 |
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Owner name: EGON EVERTZ KG (GMBH & CO), GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LAMBERT, JACQUES-OLIVIER;MAURICE, JEAN-LOUIS;SCHWIRTZ, GILLES;AND OTHERS;SIGNING DATES FROM 20200908 TO 20200911;REEL/FRAME:054054/0309 |
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