EP3784433A1 - Grinding device - Google Patents
Grinding deviceInfo
- Publication number
- EP3784433A1 EP3784433A1 EP19720770.7A EP19720770A EP3784433A1 EP 3784433 A1 EP3784433 A1 EP 3784433A1 EP 19720770 A EP19720770 A EP 19720770A EP 3784433 A1 EP3784433 A1 EP 3784433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- pressure air
- nozzle
- slab
- air nozzle
- 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 71
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 8
- 230000000284 resting effect Effects 0.000 claims description 2
- 238000003801 milling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000005068 cooling lubricant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000007792 addition Methods 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
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
Definitions
- the invention relates to a device for grinding a continuously cast product, in particular a slab, a billet or block, with at least one rotating grinding wheel attached to a grinding head.
- grinding devices can be processed steel, in particular in the form of steel slabs, which are produced in a slab caster.
- slabs are generally cuboid.
- the slab coming from the casting process has production-related surface defects, which exist, for example, in the form of grooves, grooves, cracks or other undesirable inclusions.
- Flämmbearbeitung has the disadvantage that melted material can not be melted again without treatment due to the high oxygen content.
- EP 2 032 285 therefore, a surface treatment by milling is proposed.
- hot milling chips which must be removed from the work area.
- the roll or face milling cutters used must also be cooled in order to prevent overheating of the milling tools, which would lead to considerable wear.
- For cooling cooling lubricants are used, which make immediate further processing of the removed chips impossible.
- the cooling lubricant must be disposed of separately as hazardous waste.
- the present invention relates to both surface grinding operations in which the
- Grinding wheel axis is oriented. Such devices are described for example in DE 101 48 183 A1. It is an object of the present invention to provide a grinding device that performs a leading to an improved surface quality grinding work.
- the device according to claim 1 which is characterized in that at least one high-pressure air nozzle is arranged on the grinding head, which blows the continuously cast product before the grinding of adhering or resting particles without the use of a liquid.
- the advantage of such a grinding device is that dust grains
- Metal chips or other adhering particles are removed before the grindstone reaches the relevant processing zone.
- abraded particles from the grinding wheel that are harder than (slab) steel are blown away, thus not forcing these particles into the slab surface during grinding
- the high pressure air nozzle or nozzles are integrated on the grinding head, so that by this assembly, the distance of the grinding wheels to the high pressure air nozzle and the jet direction is fixed and remains unchanged even during the movement of the head to guide the grinding wheel.
- Milling operations that produce chips, which then have to be disposed of, can be the blown sanding dust, for example by a
- two or more high-pressure air nozzles are arranged on both sides of the grinding wheel or each grinding wheel, so that at least one high-pressure air nozzle is operable at a direction of grinding, which blows away particles before grinding.
- the pressurization of the nozzles can be done by the same control, which also initiates the change of direction during grinding.
- the pressures used are preferably at least 2 bar (2 ⁇ 10 5 Pa), in particular between 5 bar and 120 bar ( 5 ⁇ 10 5 Pa to 12 ⁇ 10 6 Pa).
- the air outlet velocity at the nozzle is at least 100 m / sec, preferably more than 200 m / sec.
- Fig. 1 is a schematic diagram for illustrating the state of the
- FIG. 2 is a schematic diagram according to the present invention with an additionally used high-pressure air nozzle
- Fig. 3 shows a first embodiment of a grinding head with a
- FIG. 4 shows a second embodiment of a grinding head with a
- the grinding wheel 10 shown in Fig. 1 is used to treat a slab 11, wherein in the example shown, the slab is moved along the arrow 12 until the grinding work was done over the entire slab length. Subsequently, the slab 1 1 is advanced in the vertical direction to the longitudinal axis to pass through the next slideway in the longitudinal axial direction.
- Remaining abrasive grains or metal or dust grains as well as defect inclusions on the slab surface are indicated by reference numeral 13.
- the slab is moved in the direction of the arrow 12 during the grinding process.
- the fixed grinding wheel 10 is located on a grinding head, not shown, which additionally serves as a support for a nozzle 14 which is flattened towards the front and forms a nozzle slot, from which air flows under high pressure.
- the air jet is directed so that it blows away the grains and dusts lying in front of the grinding wheel as well as the resulting sanding dust caused by the grinding process
- Abrasion of the grinding wheel can be generated.
- the grinding wheel 10 and the high-pressure air nozzle 14 are fastened to a grinding head 15.
- the embodiment according to FIG. 4 differs from that described above in that two high-pressure air nozzles 141 and 142 are provided, which are arranged offset on both sides of the grinding wheel 10 and which are operated alternately, so that grinding wheel movements to the slab in two directions (see double arrow 17). respectively. It is the high-pressure air nozzle with compressed air subjected to which slightly offset unprocessed grinding areas as well as resulting grinding dust.
- the exiting air flow is identified by reference numeral 18.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
---|---|
EP3784433A1 true EP3784433A1 (en) | 2021-03-03 |
Family
ID=66349217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19720770.7A Pending EP3784433A1 (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) |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB973575A (en) * | 1961-09-01 | 1964-10-28 | Coventry Gauge & Tool Co Ltd | Improvements in grinding |
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 |
DE19526280A1 (en) * | 1995-07-19 | 1997-01-23 | Schloemann Siemag Ag | Grinding device |
JPH11188570A (en) * | 1997-12-24 | 1999-07-13 | Toyoda Mach Works Ltd | Device and method for machining using cool air cooling |
JP3787739B2 (en) * | 1998-01-26 | 2006-06-21 | トヨタ自動車株式会社 | Machining equipment using cold air cooling |
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 | Cryogenic cooling and nano particle jet flow minimal quantity lubrication coupling grinding medium supply system |
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 US US17/047,586 patent/US20210114169A1/en not_active Abandoned
- 2019-04-12 EP EP19720770.7A patent/EP3784433A1/en active Pending
- 2019-04-12 WO PCT/DE2019/100336 patent/WO2019206365A1/en unknown
- 2019-04-12 CN CN201980015395.3A patent/CN111757791A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2019206365A1 (en) | 2019-10-31 |
US20210114169A1 (en) | 2021-04-22 |
CN111757791A (en) | 2020-10-09 |
DE102018109804A1 (en) | 2019-10-24 |
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