EP4401922A1 - Kühlvorsatz für eine arbeitsmaschine - Google Patents
Kühlvorsatz für eine arbeitsmaschineInfo
- Publication number
- EP4401922A1 EP4401922A1 EP22789878.0A EP22789878A EP4401922A1 EP 4401922 A1 EP4401922 A1 EP 4401922A1 EP 22789878 A EP22789878 A EP 22789878A EP 4401922 A1 EP4401922 A1 EP 4401922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- housing
- shaft
- attachment
- tool
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/20—Devices for cleaning or cooling tool or work
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/003—Attachments
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
- B23Q11/141—Methods or arrangements for maintaining a constant temperature in parts of machine tools using a closed fluid circuit for cooling or heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/005—Attachments or adapters placed between tool and hammer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/003—Multiple wall conduits, e.g. for leak detection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2250/00—Compensating adverse effects during turning, boring or drilling
- B23B2250/12—Cooling and lubrication
- B23B2250/125—Improving heat transfer away from the working area of the tool by conduction
Definitions
- the invention relates to a cooling attachment for detachable attachment to a working machine which has a shaft in which a rod-shaped workpiece is guided in a rotating or hammering manner and emerges from the shaft at a free end.
- the invention relates to a device consisting of the work machine in combination with the cooling attachment according to the invention and a method for operating said device.
- Work machines within the meaning of the present invention are in particular needle embossers, which are designed to emboss a data matrix or a code into a workpiece, in particular a forged workpiece, after the forging process for the purpose of simplified traceability.
- working machines within the meaning of the invention can also be drills or cordless screwdrivers that drive a typically interchangeable tool, for example a screwdriver, a chisel or an embossing die.
- a typically interchangeable tool for example a screwdriver, a chisel or an embossing die.
- the work machine can be operated in a rotating or hammering mode. Chisels or dies are typically hammered while screwdrivers are typically rotary.
- the cooling attachment disclosed there serves in particular to cool a hand-held power tool and in particular to cool steel needles emerging from a shank of the hand-held power tool, which are used for embossing or for removing surfaces from workpieces.
- the cooling attachment disclosed there has all the features according to the preamble of patent claim 1 .
- the cooling attachment disclosed there has an outer housing in which continuous slots are arranged for a cooling medium to exit or enter.
- the housing is preferably formed from less heat-conducting material, in particular from plastic.
- the cooling attachment In addition to the outer housing, it also has an inner housing that surrounds a work area of the working machine.
- the inner housing is made of a material that conducts heat relatively well, which ensures adequate dissipation of the frictional heat from said working area of the working machine.
- the cooling attachment known from the German Offenlegungsschrift is only designed to direct the cooling medium either from the end close to the working machine to the free end of the housing and there to the tool to be cooled, or in the opposite direction. This has the disadvantage that the cooling effect is not particularly high.
- the cooling medium when the cooling medium is conducted to the tool to be cooled, it emerges from the cooling attachment in the vicinity of the workpiece to be machined and cools the workpiece.
- the invention is based on the object of further developing a known cooling attachment for a working machine, a known device consisting of the working machine with the cooling attachment according to the invention, a known method for operating said device and a method for producing the cooling attachment in such a way that the cooling of the working machine and of the tool driven by it is improved or made more effective, but at the same time cooling of the workpiece to be machined is prevented as far as possible.
- a second cooling duct running in the longitudinal direction of the housing is formed within the housing for conducting the cooling medium from the free end of the housing shaft to at least one outlet opening, which is also formed at the end of the housing close to the working machine, and that at the free End of the housing shaft at least one connecting hole between the two cooling channels is provided for diverting the cooling medium from the first into the second cooling channel.
- the flow of the cooling medium in the return line can advantageously be controlled by the flow of the Affected cooling medium in the feed line, are advantageously swirled, whereby their cooling effect on the tool, d. H. in particular an embossing pin is improved. This then also reduces the wear on the tool and increases its service life.
- the tool for example the needle of a needle embosser, can heat up to several 100°C when processing still warm forged workpieces. Because the tool therefore requires particularly strong cooling, it is advantageous if the preferably turbulent cooling medium with the improved cooling effect is routed first to the tool to be cooled and only then to the machine to be cooled by the double channel routing and deflection claimed in the invention. Through the second or (return) channel, the cooling medium is advantageously also routed past the area of the working machine where the drive of the working machine, which is heating up and is cooled in this way, is seated.
- the claimed deflection has the significant advantage that the cooling medium in the area of the tool to be cooled - at least apart from small leakage losses - does not escape from the cooling attachment and cools down the machined workpiece there in an undesirable manner, but is diverted into the return line.
- the Return line, ie the second cooling channel ends at at least one outlet opening, which according to the invention is formed at the end of the housing close to the working machine, ie opposite to the free end and thus at a great distance from the possibly hot workpiece to be machined. In this respect, undesired cooling of the workpiece is effectively prevented by the formation of the outlet openings there.
- the said advantageous turbulence of the cooling medium is advantageously achieved according to the invention - in addition to the said deflection - in that the at least one connecting bore is preferably designed in the form of a plurality of nozzle openings arranged in a ring, which do not point to the central longitudinal axis of the cooling attachment, but are each directed tangentially to the edge of a bore in the housing of the cooling attachment through which the tool exits to the outside of the cooling attachment.
- This causes a circular, eddy-like flow of the cooling medium, which improves its cooling effect. After absorbing the heat from the tool, the cooling medium thus heated flows within the second cooling channel to the outlet opening.
- a plurality of outlet openings are distributed over the circumference of the housing in order to realize the largest possible cross section for the outlet opening.
- the large cross section is particularly advantageous in connection with a conical design of at least one of the outlet openings in order to draw in the heated cooling medium through the first and the second cooling channel and to transport it outside of the cooling attachment.
- a blower for introducing the cooling medium through the inlet openings into the cooling ducts or for sucking the cooling medium through the inlet opening into the cooling ducts is advantageously unnecessary with this conical configuration of the outlet openings. That flowing through the second cooling channel
- the cooling medium advantageously provides thermal insulation of the working machine, i.e. for example the dot peen from the radiant heat of the possibly still hot workpiece, in particular a forging, and on the other hand this internal flow of the cooling medium also protects the cooling attachment itself from said radiant heat.
- a configuration of the housing shaft according to the invention in such a way that its free end tapers conically towards the longitudinal axis of the housing offers the advantage that the cooling medium in this area can also flow from the radially further outward cooling channel through the at least one connecting bore to the longitudinal axis of the housing and thus also to the emerging from the shaft of the machine tool to be cooled is directed.
- This effect of the conical end of the housing shank does not conflict with the cooling medium being directed tangentially onto the tool to be cooled, given a corresponding alignment of the connecting bores.
- the cooling attachment according to the invention has a cavity for accommodating at least part of the working machine.
- This cavity is formed at the free end of the housing by a bore, the cross section of which essentially corresponds to the cross section of the tool emerging there.
- the bore is larger than the cross-section of the tool only to the extent that the tool can be moved through the bore without friction, but is not unnecessarily larger.
- the gap between the tool and the housing of the tool should be as small as possible cooling attachment to ensure that only as little cooling medium as possible can escape from the housing through this gap, see above: Leakage losses.
- the exit of the cooling medium through the gap is also ensured by the above-described circular eddy-like flow of the cooling medium and the suction that is generated by the conical large outlet openings in the upper area of the cooling attachment.
- the object of the invention is achieved by the method according to claim 14 for operating the device according to the invention and the method according to claim 17 for producing the cooling attachment according to the invention.
- the cooling attachment according to the invention is particularly advantageously produced using the 3D printing process.
- the cooling attachment is geometrically optimized according to the additive process/production restrictions, so that it can be used almost directly from the printer. This means that no supporting structures are required, which later have to be laboriously removed, and only a threaded hole for the air connection will be required as a mechanical post-processing. Otherwise, the advantages of the methods correspond to the advantages mentioned above with reference to the claimed cooling attachment and the claimed device.
- FIG. 1 shows the cooling attachment according to the invention in a perspective external view
- FIG. 2 shows the device according to the invention in a longitudinal section
- FIG. 3 shows the device according to the invention at its free end in an enlarged view of FIG. 2;
- FIG. 4 shows the device according to the invention in a cross section.
- FIG. 1 shows the cooling attachment 100 according to the invention in a perspective external view.
- the cooling attachment has a housing 110 with a shaft 112 .
- the housing with the housing shank is formed with a cavity 160 for releasably receiving a work machine 200, also typically having a shank 210; see FIG. 2.
- the free end of the housing shaft 112 preferably tapers conically towards the longitudinal axis L of the cooling attachment.
- the housing 110 of the cooling attachment 100 has an inlet opening 122 and preferably a plurality of outlet openings 126 for a cooling medium for cooling the working machine 200 that may be accommodated and one of the shaft 210 of the working machine and the rod-shaped tool 300 emerging from the housing shaft 112; see figure 2.
- FIG. 2 shows the device 400 according to the invention, which shows the cooling attachment 100 according to the invention when it is placed on the working machine 200.
- the device 400 means the work machine 200 when this is accommodated in the cavity 160 of the cooling attachment 100 .
- the shank 210 of the working machine 200 is then also received by the shank 112 of the housing 110 and the tool 300 driven by the working machine 200 emerges at the free end 114 of the housing shank 112 from a bore 162 there.
- the tool 300 is rotationally driven by the work machine 200 or hammered up and down along the longitudinal axis L of the housing 110 which coincides with the longitudinal axis of the shank 210 of the work machine.
- a first cooling channel 120 extending in the longitudinal direction of the housing is formed in the outer wall of housing 110 of the cooling attachment for conducting a coolant from inlet opening 122 at the end near the working machine 116 to the free end 114 of the housing shank for cooling the rod-shaped tool 300 there.
- a connecting bore 150 which is preferably in the form of a plurality of annularly arranged nozzle openings in order to direct the incoming cooling medium there after the Redirect hitting the tool 300 to be cooled into a second cooling channel 130 .
- the nozzle openings are preferably not directed centrally to the longitudinal axis L of the housing or the tool 300, but tangentially to the edge of the bore 162 or tangentially to the tool 300, for example the needle of a needle embosser.
- the tangential direction of the nozzle openings and thus of the coolant flow causes turbulence and thus advantageously an improved cooling effect of the coolant flow.
- the second cooling channel 130 leads the cooling medium from the free end 114 back to the end 116 of the housing 110 close to the working machine so that it can exit from the outlet openings 126 there.
- the Outlet openings 126 are preferably designed conically in order to suck the cooling medium through the inlet opening 122 and the first cooling duct 120 into the second cooling duct 130 .
- the first cooling duct 120 and the second cooling duct 130 are preferably each designed as an annular duct and they preferably run coaxially to one another. While the first cooling channel 120 is formed entirely within the wall of the housing 110 , the second cooling channel 130 is only partially delimited by a wall that is radially removed from the longitudinal axis L of the housing 110 as part of the housing 110 .
- the second cooling channel of the cooling attachment is open towards the longitudinal axis L of the housing at another part that is located radially further inwards, i. H. not limited by the housing 110 itself. Instead, the delimitation of the second cooling channel is formed there by the outer surface of the working machine 200 and in particular its shaft 210 itself. That is, while the cooling medium in the second cooling channel 130 flows to the outlet openings 126, it automatically flows along the working machine 200 and its shaft 210 and in this way cools these parts.
- FIG. 3 shows the free end of the housing shaft 114 according to FIG. 2 in an enlarged view.
- the tool 300 can be seen as it emerges from the free end 114 of the housing shank in order to machine the workpiece 500 .
- FIGS. 3 and 4 show that the bore 162 has a cross section which essentially corresponds to the cross section of the tool 300 passing through there.
- the gap between the tool 300 and the edge of the bore 162 should be designed as small as possible, so that the cooling medium is prevented as far as possible from escaping through this gap. In this way, according to the invention, undesired cooling of the workpiece 500 to be machined is prevented in particular.
- Figure 4 shows the introduction of the cooling medium through the inlet opening 122 into the first cooling duct 120 designed as an annular duct.
- Figure 4 shows a cross section through the cooling attachment according to the invention not only in a plane in the area of the end 116 of the housing close to the working machine at the level of the inlet opening 122, but also in a plane in the free end 114 of the housing shaft 112.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
- Portable Power Tools In General (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021210224.7A DE102021210224A1 (de) | 2021-09-15 | 2021-09-15 | Kühlvorsatz für eine Arbeitsmaschine |
| PCT/EP2022/075568 WO2023041604A1 (de) | 2021-09-15 | 2022-09-14 | Kühlvorsatz für eine arbeitsmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4401922A1 true EP4401922A1 (de) | 2024-07-24 |
Family
ID=83692841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22789878.0A Pending EP4401922A1 (de) | 2021-09-15 | 2022-09-14 | Kühlvorsatz für eine arbeitsmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240278372A1 (de) |
| EP (1) | EP4401922A1 (de) |
| JP (1) | JP7759477B2 (de) |
| DE (1) | DE102021210224A1 (de) |
| WO (1) | WO2023041604A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121666281A (zh) * | 2023-06-30 | 2026-03-13 | 艾达普克斯系统有限公司 | 用于冷却工具的设备、系统和方法 |
| EP4484036A1 (de) * | 2023-06-30 | 2025-01-01 | Technische Universität Berlin | Vorrichtung, system und verfahren für die kühlung eines werkzeugs |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2554568A (en) * | 1946-07-17 | 1951-05-29 | Independent Pneumatic Tool Co | Clay digger |
| DE1704296A1 (de) * | 1967-03-15 | 1971-05-06 | Siemens Ag | Entspan- und Kuehlvorrichtung an Bohrmaschinen |
| CH596946A5 (de) * | 1975-09-09 | 1978-03-31 | Infranor Sa | |
| US4037982A (en) * | 1974-09-11 | 1977-07-26 | Infranor S.A. | Machine tools |
| JPH0755437B2 (ja) * | 1992-08-06 | 1995-06-14 | 富士重工業株式会社 | 工作機械の冷却集塵装置 |
| DE19703094A1 (de) | 1996-02-06 | 1997-08-07 | Bosch Gmbh Robert | Handwerkzeugmaschine mit Vorsatzgerät |
| DE19626254A1 (de) | 1996-06-29 | 1998-01-08 | Bosch Gmbh Robert | Elektrohandwerkzeugmaschine |
| WO2001068302A1 (en) | 2000-03-13 | 2001-09-20 | James Hardie Research Pty Limited | Swarf collection device |
| JP2005028471A (ja) | 2003-07-08 | 2005-02-03 | Sato Tekko Co Ltd | 有害汚染物の切削屑回収方法 |
| WO2015166068A1 (de) | 2014-04-30 | 2015-11-05 | MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG | Mittels eines lasersinterverfahrens hergestelltes werkzeug |
| GB2559386B (en) | 2017-02-03 | 2019-09-04 | Nikken Kosakusho Europe Ltd | Device for the extraction of machining dust |
-
2021
- 2021-09-15 DE DE102021210224.7A patent/DE102021210224A1/de active Pending
-
2022
- 2022-09-14 JP JP2024510611A patent/JP7759477B2/ja active Active
- 2022-09-14 WO PCT/EP2022/075568 patent/WO2023041604A1/de not_active Ceased
- 2022-09-14 EP EP22789878.0A patent/EP4401922A1/de active Pending
- 2022-09-14 US US18/688,830 patent/US20240278372A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7759477B2 (ja) | 2025-10-23 |
| US20240278372A1 (en) | 2024-08-22 |
| DE102021210224A1 (de) | 2023-03-16 |
| JP2024530718A (ja) | 2024-08-23 |
| WO2023041604A1 (de) | 2023-03-23 |
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