CN111575632B - Device for coating a cylinder bore - Google Patents

Device for coating a cylinder bore Download PDF

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Publication number
CN111575632B
CN111575632B CN202010079583.7A CN202010079583A CN111575632B CN 111575632 B CN111575632 B CN 111575632B CN 202010079583 A CN202010079583 A CN 202010079583A CN 111575632 B CN111575632 B CN 111575632B
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CN
China
Prior art keywords
cylinder bore
fan
coating
air
suction
Prior art date
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Active
Application number
CN202010079583.7A
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Chinese (zh)
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CN111575632A (en
Inventor
S.里奇特
M.赫什费尔特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
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Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of CN111575632A publication Critical patent/CN111575632A/en
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Publication of CN111575632B publication Critical patent/CN111575632B/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • C23C4/16—Wires; Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
    • B05B7/201—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle
    • B05B7/205—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material
    • B05B7/206—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material in a container fixed to the discharge device

Abstract

The invention relates to a device for coating a cylinder bore (121) which is located in a crankcase (12) for an internal combustion engine, comprising a coating device (14) which can be introduced into the cylinder bore (121), and a suction device by means of which the cylinder bore (121) can be acted upon with an axial pressure drop, wherein the suction device has a first fan (24) connected downstream of the cylinder bore (121) in the suction direction for generating a negative pressure. The invention is characterized in that the suction device has an additional second fan (30) which is different from the first fan (24) and is connected to generate overpressure, upstream of the cylinder bore (121) in the suction direction.

Description

Device for coating a cylinder bore
Technical Field
The invention relates to a device for coating a cylinder bore, which is located in a crankcase for an internal combustion engine, comprising a coating device that can be introduced into the cylinder bore, and a suction device, by means of which the cylinder bore can be loaded with an axial pressure drop, wherein the suction device has a first fan connected downstream of the cylinder bore in the suction direction for generating a negative pressure.
Background
DE 199 36 393 A1 discloses in its prior art a plasma coating of the bore wall of a cylinder bore in a crankcase for producing a durable and tribologically advantageous cylinder running surface. In order to coat the walls of the bore, the plasma burner is guided into the bore and along the walls of the bore until the entire wall is provided with the desired coating. In order to suck the plasma mist generated in this way, the gas cylinder bore is pressurized with a constant, axial pressure gradient. It is known from the applicant's practice to mount the crankcase on a table, which is provided on one side with an air passage opening in air-conducting connection with the cylinder bore and on the other side is covered by a cap-like suction device. The air through hole is provided with an air supply pipeline on the inlet side. The cap sets and arranges the exhaust pipe, exhaust pipe self is connected with first fan. In this way, a negative pressure is generated above the crankcase, which negative pressure causes air to pass through the supply line, the air passage opening of the table and the cylinder bore. When passing through the cylinder bore, the plasma mist generated there during the coating process is entrained and discharged via the exhaust line of the cap. It is important to maintain a strong and constant negative pressure, which is the same in particular in the possibly several cylinder bores of the clutch housing and/or in several crankcase chambers located below the caps on the table.
In particular in larger installations (in which a plurality of crankcases are arranged below the caps and on the table), this specification is partially difficult to achieve, since the specific design of the caps and the exhaust line may be subject to additional boundary conditions, for example, which are dictated by the overall length of the design.
Disclosure of Invention
The object of the present invention is to improve a coating device of the type according to the invention in such a way that a sufficiently strong, well-controlled air flow through the cylinder bore (or cylinder bore) is ensured.
The object is achieved by the device according to the invention for coating a cylinder bore in a crankcase of an internal combustion engine, comprising a coating device that can be inserted into the cylinder bore and a suction device by means of which a carrier gas bore can be pressurized with an axial pressure drop, wherein the suction device has a first fan connected downstream of the cylinder bore in the suction direction for generating a negative pressure, and the suction device has an additional second fan, different from the first fan, connected for generating an overpressure upstream of the cylinder bore in the suction direction.
The core idea of the invention is that, in addition to a first fan which is arranged downstream of the cylinder bore and generates a negative pressure there, a second fan is arranged upstream of the cylinder bore, which second fan generates an overpressure there or reinforces an overpressure (or overpressure) which has already developed in relation to the negative pressure generated by the first fan. In other words, according to the invention, the supply air is not only sucked in (or supplied air) by means of the first fan, but is additionally blown in by means of the second fan. This not only creates the possibility of absolutely intensifying the air flow through the cylinder bore. An additional degree of freedom of control is also created, which enables precise, demand-oriented control of the air flow in the cylinder bore, in each case currently undergoing the coating process. In general, an intensification and homogenization of the air flow through the cylinder bore can be achieved.
The invention is particularly suitable for retrofitting coating units according to the prior art, namely for retrofitting units which are characterized in that the suction unit has a table which is covered by a cap and which is provided with at least one air passage opening and on which the crankcase can be placed with the cylinder bore connected in an air-conducting manner to the air passage opening. As already mentioned above, in this arrangement the cap is provided on the outlet side with at least one exhaust line connected to the first fan. The second fan according to the invention is preferably connected to an air supply line, which is assigned to the air passage opening of the table on the inlet side. The second fan may in particular be integrated in the air supply line. In particular, such an integrated arrangement of the fan, which is designed in a turbine-like manner and allows particularly efficient blowing in of air, is possible because, unlike in the first fan (exhaust fan) in general, no filter element or separating element is required between the fan and the cylinder bore.
In a preferred embodiment of the invention, it is provided that the cap is provided with at least one additional air supply opening. Such a supply opening can be used to control the underpressure in the cap.
As is known per se from the prior art, the coating device itself is preferably designed as a plasma coating device. The plasma burner is arranged laterally and vertically movably in the cap and, if necessary, is guided into the cylinder bore and is moved there. In order to protect components of the plasma nozzle that do not project directly into the cylinder bore from plasma fumes entrained by the air flow out of the cylinder bore, corresponding baffles may be provided.
The control of the air flow, in particular of the second fan according to the invention, can be effected as a function of the respective process parameters of the coating process at present.
Drawings
Further details and advantages of the invention emerge from the following description and the drawings.
In the drawings:
fig. 1 shows a schematic view of a coating device according to the invention.
Detailed Description
Fig. 1 shows a largely simplified illustration of a coating device 10 according to the invention for coating the walls of a cylinder bore 121 of a crankcase by means of a plasma coating device 14. The plasma coating device 14 comprises a plasma burner 141, which can be inserted into the cylinder bore and is moved axially and rotationally in the course of the plasma coating process according to the directional arrow 142. In order to protect the electromechanical components 143, which are schematically illustrated in a rough manner, of the plasma coating device 14 from the plasma smoke escaping from the cylinder bore 141, a baffle 144 is arranged between the electromechanical components 143 and the burner 141.
The crankcase 12 is positioned on a table 16, which is penetrated from below upward by an air passage hole 161. The air passage 161 largely transitions into the cylinder bore 121, which is positioned concentrically thereto, in an aligned and air-tight manner, so that the two openings form a common air channel.
The air supply duct 18 is connected to the air passage 161 below the table 16. In the embodiment shown, the air supply line 18 is divided into a first supply line 181 and a second supply line 182, which will be explained in more detail below.
A cap 20 is arranged on the table 16, which cap covers the crankcase 12 and the plasma coating device 14. The plasma mist generated in the course of the coating process cannot therefore escape in an uncontrolled manner, but rather remains in the space defined by the cap.
In order to ensure reliable pumping of the plasma fumes, the cap 20 is laterally connected to an exhaust line 22. In the embodiment shown, the first fan 24 is integrated in the exhaust line 22, so that a negative pressure is generated there, which forms an exhaust gas flow 26. The exhaust gas flow 26 carries away the plasma smoke that has diffused in the cap 20 and can be isolated in a filter and/or a separating device, which is not shown in fig. 1, arranged upstream of the fan 24.
The air drawn off through the exhaust line 22 of the cap 20 is compensated by the air flowing in via the supply line 18. The first supply air partial flow 281 flows purely passively through the first branch 181 of the supply air line 18. In the second branch 182 of the air supply line 18, a second fan 30 is arranged, which actively pushes a second air supply partial air flow 282 into the air supply line 18. In this way, the air flow through the cylinder bore 121 is intensified and homogenized in relation to a purely passive suction by means of the first fan 24, which homogenization is particularly shown in the context of embodiments in which a plurality of cylinder bores 121 to be coated at the same time or the crankcase 12 are positioned under the same cap 20.
In the embodiment shown, a third air supply partial air flow 283 is also provided, which can flow in via the additional air supply connection 32 and can be controlled in this case by means of the non-return valve 34. Alternatively or additionally, the third air supply partial air flow can be supplied via a perforated plate, not shown.
The embodiments discussed in the specific description and shown in the drawings naturally represent only illustrative embodiments of the invention. Various possible variations will occur to those skilled in the art in light of the disclosure herein.
List of reference numerals
10. Coating device
12. Crankcase
121. Cylinder bore
14 (plasma) coating apparatus
141. Plasma burner
142. Direction arrow
143. Electromechanical device
144. Baffle plate
16. Working table
161. Air vent
18. Air supply pipeline
181. First branch of air supply pipeline
182. Second branch of air supply pipeline
20. Cap cover
22. Exhaust pipeline
24. First fan
26. Exhausting the air flow
281. First air supply part airflow
282. Second air supply part airflow
283. Third air supply part airflow
30. Second fan
32. Additional air supply connecting pipe
34. Check valve

Claims (4)

1. A device for coating a cylinder bore (121) in a crankcase (12) of an internal combustion engine, comprising a coating device (14) which can be introduced into the cylinder bore (121), and a suction device by means of which the cylinder bore (121) can be acted upon with an axial pressure drop, wherein the suction device has, downstream of the cylinder bore (121) in the suction direction, a first fan (24) which is connected for generating a negative pressure, and wherein the suction device has, upstream of the cylinder bore (121) in the suction direction, an additional, second fan (30) which is different from the first fan (24) and is connected for generating an overpressure, characterized in that the suction device also has a table (16) which is covered by a cap (20), the cap (20) being provided with at least one exhaust line (22) which is connected to the first fan (24) on the outlet side, the table being provided with at least one air passage opening (161), and the crankcase (12) being able to be placed on the table with the cylinder bore (121) in air-conducting connection with the air passage opening (161), wherein the air passage opening (16) is provided with at least one air supply line (18) which is connected to the second fan opening (16).
2. The apparatus of claim 1,
the cap (20) is provided with at least one additional air supply opening.
3. The device according to claim 1 or 2, characterized in that the coating device (14) is configured as a plasma coating device.
4. The device according to claim 1 or 2, characterized in that the operating power of the second fan (30) can be controlled in dependence on process parameters of the coating process.
CN202010079583.7A 2019-02-18 2020-02-04 Device for coating a cylinder bore Active CN111575632B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019104017.5 2019-02-18
DE102019104017.5A DE102019104017A1 (en) 2019-02-18 2019-02-18 Device for coating a cylinder bore

Publications (2)

Publication Number Publication Date
CN111575632A CN111575632A (en) 2020-08-25
CN111575632B true CN111575632B (en) 2022-12-27

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CN202010079583.7A Active CN111575632B (en) 2019-02-18 2020-02-04 Device for coating a cylinder bore

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EP (1) EP3695909B1 (en)
CN (1) CN111575632B (en)
DE (1) DE102019104017A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115805157B (en) * 2022-12-08 2023-06-20 邯郸市美坚利五金制造有限公司 Spraying equipment

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027589A1 (en) * 1979-07-27 1981-02-12 Europ Equip Menager SYSTEM FOR ELECTROSTATIC SPRAYING HOLLOW ITEMS WITH POWDER PARTICLES
WO2000037704A1 (en) * 1998-12-18 2000-06-29 Volkswagen Aktiengesellschaft Method for thermally coating the surfaces of an inner area, especially the cylinder bearing surfaces in a cylinder crankcase in an internal combustion engine
JP2002004024A (en) * 2000-06-21 2002-01-09 Suzuki Motor Corp Thermal spraying device for cylinder
DE10064440A1 (en) * 2000-12-22 2002-06-27 Volkswagen Ag Method and appliance for machining inner surface of cylindrical bore of cylinder block by laser beam extracts particle mist by suction pipe
CN1367717A (en) * 1999-08-03 2002-09-04 大众汽车有限公司 Method and device for applying or introducing material onto or in surface
DE10230847B3 (en) * 2002-07-04 2004-02-05 Universität Stuttgart Institut für Fertigungstechnologie keramischer Bauteile Process and device for the internal coating of cavities by thermal spraying
CN101922375A (en) * 2009-06-10 2010-12-22 F.波尔希名誉工学博士公司 Cylinder block and method for the production of a cylinder block
JP2014167171A (en) * 2014-04-28 2014-09-11 Mitsubishi Heavy Ind Ltd Spray coating facility
WO2015093199A1 (en) * 2013-12-17 2015-06-25 日産自動車株式会社 Thermal spraying method and thermal spraying device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008016040B3 (en) * 2008-03-28 2009-11-26 Daimler Ag Device for reducing a coating process on undesirable places during electric arc wire spraying, comprises an interior burner, a cylindrical cavity within which the interior burner is arranged, and flow nozzles subjected with gas pressure
DE102010060652A1 (en) * 2010-11-18 2012-05-24 Martinrea Honsel Germany Gmbh Device for the thermal coating of cylinder inner surfaces in crankcases
DE102012112488B4 (en) * 2012-12-18 2017-07-13 Gebr. Heller Maschinenfabrik Gmbh Arc wire spray coating method for cylinder bores of internal combustion engines
DE102017127581B4 (en) * 2017-11-22 2023-12-14 Gebr. Heller Maschinenfabrik Gmbh Device and method for coating an inner cylinder surface of a cylinder chamber of an engine block

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027589A1 (en) * 1979-07-27 1981-02-12 Europ Equip Menager SYSTEM FOR ELECTROSTATIC SPRAYING HOLLOW ITEMS WITH POWDER PARTICLES
WO2000037704A1 (en) * 1998-12-18 2000-06-29 Volkswagen Aktiengesellschaft Method for thermally coating the surfaces of an inner area, especially the cylinder bearing surfaces in a cylinder crankcase in an internal combustion engine
CN1367717A (en) * 1999-08-03 2002-09-04 大众汽车有限公司 Method and device for applying or introducing material onto or in surface
JP2002004024A (en) * 2000-06-21 2002-01-09 Suzuki Motor Corp Thermal spraying device for cylinder
DE10064440A1 (en) * 2000-12-22 2002-06-27 Volkswagen Ag Method and appliance for machining inner surface of cylindrical bore of cylinder block by laser beam extracts particle mist by suction pipe
DE10230847B3 (en) * 2002-07-04 2004-02-05 Universität Stuttgart Institut für Fertigungstechnologie keramischer Bauteile Process and device for the internal coating of cavities by thermal spraying
CN101922375A (en) * 2009-06-10 2010-12-22 F.波尔希名誉工学博士公司 Cylinder block and method for the production of a cylinder block
WO2015093199A1 (en) * 2013-12-17 2015-06-25 日産自動車株式会社 Thermal spraying method and thermal spraying device
JP2014167171A (en) * 2014-04-28 2014-09-11 Mitsubishi Heavy Ind Ltd Spray coating facility

Also Published As

Publication number Publication date
DE102019104017A1 (en) 2020-08-20
EP3695909A3 (en) 2020-09-02
EP3695909B1 (en) 2022-08-10
CN111575632A (en) 2020-08-25
EP3695909A2 (en) 2020-08-19

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