EP3186492A1 - TASSENSTÖßEL UND VERFAHREN ZU DESSEN HERSTELLUNG - Google Patents
TASSENSTÖßEL UND VERFAHREN ZU DESSEN HERSTELLUNGInfo
- Publication number
- EP3186492A1 EP3186492A1 EP15744476.1A EP15744476A EP3186492A1 EP 3186492 A1 EP3186492 A1 EP 3186492A1 EP 15744476 A EP15744476 A EP 15744476A EP 3186492 A1 EP3186492 A1 EP 3186492A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cup
- tappet
- contact surface
- bucket
- combustion engine
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 230000001680 brushing effect Effects 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract 1
- 238000005498 polishing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/16—Silencing impact; Reducing wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/146—Push-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
Definitions
- the invention relates to a tappet for an internal combustion engine, comprising a tappet housing with a hollow cylindrical cup and a mug cup on one side closing cup bottom on which the cup shirt is formed by chipless cold forming a steel blank, the outside of the cup bottom as a contact surface for a tappet hubbeaufierden the Internal combustion engine is used, and in which the outside of the cup top as a contact surface for a cup tappet in the stroke direction bearing guide bore of the internal combustion engine.
- Such tappets are used in the gas exchange valve drive of an internal combustion engine to transmit the cam lobe of a cam on a camshaft in an opening movement of the associated gas exchange valve.
- the bucket tappet as a tappet for the cam of a fuel injection pump to transfer the collection of the pump cam to the piston of the injection pump.
- it is a mechanically heavily loaded component which, on the one hand, has to withstand the Hertzian stresses occurring in the cam contact with sufficient wear and which, on the other hand, has to be stored sufficiently wear-and-noise-free in a guide bore.
- cam contact surface geometry is achieved by polishing and / or lapping. After that, a DLC coating is applied, which is then machined mechanically by brushing.
- the brushing operation is designed so that each section of the surface to be machined is processed uniformly, particularly with respect to the processing intensity as well as the relative movement between the cup tappet and the brushing tool, in particular without favoring any particular direction, thus providing an isotropic, wear and friction optimized surface structure ,
- the present invention has the object, a bucket tappet of the type mentioned and a method for its production in each case with regard to reduced manufacturing costs educate.
- the invention therefore initially relates to a bucket tappet for an internal combustion engine, comprising a tappet housing with a hollow cylindrical cup shirt and a cup bottom closes the cup on one side, on which the cup skirt is formed by chipless cold forming a steel blank, the outside of the cup bottom as a contact surface for a Cup tappet hubbeaufier waveden cam of the internal combustion engine is used, and in which the outside of the cup top as a contact surface for a cup tappet in the stroke direction overlapping guide bore of the internal combustion engine.
- the unprocessed and uncoated cam contact surface of the cup base is machined by means of a brushing tool in this tappet.
- the cam contact surface of the cup bottom is not finely machined by a polishing and / or lapping, but the entire mechanical processing of the cam contact surface of the cup base is exclusively by brushing, so that the cam contact surface has an isotropic structure, and the so mechanically machined tappets whose cup shirt is ground to size, can be used already in this form.
- the bucket tappet may be heat treated after the cold forming for the purpose of increasing hardness, wherein the brushing of the cam contact surface of the cup bottom can be done before or after the heat treatment.
- cam contact surface of the cup bottom has a coating, which is preferably formed as a DLC coating.
- the invention also relates to a method for producing a bucket tappet for an internal combustion engine, which comprises a bucket tappet, a tappet housing with a hollow cylindrical cup shirt and a Cup shirt unilaterally closing cup bottom on which the cup shirt is formed by chipless cold forming a steel blank, the outside of the cup base serves as a contact surface for a tappet hubbeauf providedden cam of the internal combustion engine, and in which the outside of the cup top as a contact surface for a tappet in the stroke direction stocking guide bore of the internal combustion engine is used, the method comprising the following steps:
- the brushing takes place in such a way that an isotropic surface structure is formed.
- the method may additionally comprise the following step: aa) heat treatment of the bucket tappet for hardness increase before brushing the cam contact surface.
- the method can have the additional step:
- the cam contact surface of the cup bottom has a targeted and significant improvement in surface roughness, without changing the surface topography generated during rolling of the sheets for the steel plate strong.
- This special topography has a positive effect on the reduction of the friction torque between the cam and the plunger. Since the provided in accordance with DE 10 201 1076 410 A1 polishing and / or lapping the cam contact surface before applying the DLC coating is omitted and replaced by brushing the raw and uncoated cam contact surface of the cup bottom, while after applying the DLC coating no Further brushing is performed, the processing time of the bucket tappet is shortened and simplified the manufacturing process, resulting in reduced manufacturing costs leads.
- the base material of the machine element to be coated is preferably a steel.
- Fig. 1 shows a gas exchange valve drive with a mechanical bucket tappers in longitudinal section
- Fig. 2 is an illustration of the brushing operation.
- Fig. 1 shows a trained as a bucket tappet gas exchange valve drive an internal combustion engine with mechanical valve clearance compensation.
- the mechanical bucket tappet 1 consists exclusively of a cup-shaped ram housing 2, which is produced in one piece by means of non-cutting cold forming of a steel blank and here by deep drawing a sheet metal blank.
- the plunger housing 2 is composed of a hollow cylindrical cup shirt 3 and an axially end-side cup base 4, on which the cup shirt 3 is formed and which closes the cup 3 on one side.
- the axial outer side of the cup base 4 serves as a contact surface 5 for a cam 6 whose elevation from the tappet 1 into an opening movement of the in
- Closing direction spring-loaded gas exchange valve 7 is transmitted.
- the radial outer side of the cup 3 serves as a contact surface 8 for a cup-tappet 1 in the stroke direction supporting hollow cylindrical guide bore 9 of the internal combustion engine.
- the axial inside of the cup base 4 is provided with an elevation 10 extending in the axial direction of the gas exchange valve 7, which contacts the shaft of the gas exchange valve 7 at the end.
- the valve clearance adjustment is performed by sorting a tappet 1 with an appropriate for the setpoint valve clearance axial height 1 1 of the survey 10, wherein the tappet 1 is selected from a group sorting with different elevations 10 and then mounted.
- a finely machined, in particular ground end surface 12 of the elevation 10 can be provided.
- the deep-drawn and subsequently heat-hardened ram housing 2 is at the radial outer side only on the outside of the cup 3, that is machined in the region of the contact surface 8, machined and ground here.
- the axial outer side of the cup base 4, that is to say the cam contact surface 5 is only brushed and has an isotropic surface structure which is only slightly different from that in the bottom surface. drawing process and in the heat treatment of the plunger housing 2 generated surface structure and surface geometry is different.
- Fig. 2 shows the processing of the tappet 1 by brushes.
- the tool used is a roller brush 13 which rotates in the direction of the arrow A and whose roller 15 has particle-loaded filaments 14.
- the rotating roller brush 13 is moved in the direction of the double arrow B back and forth.
- the tappet 1 is rotated in accordance with the arrow D in rotation about its longitudinal axis.
- the tappet 1 can also be moved back and forth in the direction of the double arrow E in order to obtain the desired isotropic structure of the cam contact surface 5.
- a DLC coating 5 a is applied to the cam contact surface 5 in this exemplary embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014216961.5A DE102014216961A1 (de) | 2014-08-26 | 2014-08-26 | Tassenstößel und Verfahren zu dessen Herstellung |
| PCT/DE2015/200370 WO2016029910A1 (de) | 2014-08-26 | 2015-06-16 | TASSENSTÖßEL UND VERFAHREN ZU DESSEN HERSTELLUNG |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3186492A1 true EP3186492A1 (de) | 2017-07-05 |
| EP3186492B1 EP3186492B1 (de) | 2018-08-15 |
Family
ID=53761912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15744476.1A Not-in-force EP3186492B1 (de) | 2014-08-26 | 2015-06-16 | Tassenstössel und verfahren zu dessen herstellung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US10066516B2 (de) |
| EP (1) | EP3186492B1 (de) |
| JP (1) | JP2017526856A (de) |
| KR (1) | KR20170043645A (de) |
| CN (1) | CN106661968B (de) |
| DE (1) | DE102014216961A1 (de) |
| WO (1) | WO2016029910A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020100307A1 (de) * | 2020-01-09 | 2021-07-15 | Schaeffler Technologies AG & Co. KG | Brücke für einen Ventiltrieb einer Heavy-Duty-Brennkraftmaschine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19815790B4 (de) * | 1997-05-26 | 2010-05-12 | Schaeffler Kg | Mechanischer Ventilstößel |
| DE10114073A1 (de) * | 2001-03-22 | 2002-09-26 | Ina Schaeffler Kg | Stößel |
| DE10123966A1 (de) * | 2001-05-17 | 2002-11-21 | Ina Schaeffler Kg | Tassenstößel |
| DE10360467B4 (de) * | 2003-12-22 | 2011-11-10 | Trw Deutschland Gmbh | Mechanischer Ventilstößel |
| JP5238488B2 (ja) * | 2006-02-20 | 2013-07-17 | 株式会社ジーベックテクノロジー | ブラシ状砥石 |
| DE102006036839A1 (de) * | 2006-08-07 | 2008-02-14 | Rolls-Royce Deutschland Ltd & Co Kg | Verfahren zum Bürstentgraten von Kanten von Triebwerksschaufeln |
| DE102010032254A1 (de) * | 2010-07-26 | 2012-01-26 | Schaeffler Technologies Gmbh & Co. Kg | Tassenstößel und Verfahren zu dessen Herstellung |
| DE102011076410A1 (de) | 2011-05-24 | 2012-11-29 | Schaeffler Technologies AG & Co. KG | Maschinenelement |
| DE102011120591A1 (de) * | 2011-12-08 | 2013-06-13 | Federal-Mogul Burscheid Gmbh | Verfahren zur Bearbeitung von Kolbenringen |
-
2014
- 2014-08-26 DE DE102014216961.5A patent/DE102014216961A1/de not_active Withdrawn
-
2015
- 2015-06-16 JP JP2017511196A patent/JP2017526856A/ja not_active Withdrawn
- 2015-06-16 WO PCT/DE2015/200370 patent/WO2016029910A1/de not_active Ceased
- 2015-06-16 KR KR1020177007874A patent/KR20170043645A/ko not_active Abandoned
- 2015-06-16 EP EP15744476.1A patent/EP3186492B1/de not_active Not-in-force
- 2015-06-16 CN CN201580045468.5A patent/CN106661968B/zh not_active Expired - Fee Related
- 2015-06-16 US US15/312,204 patent/US10066516B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106661968B (zh) | 2019-06-21 |
| KR20170043645A (ko) | 2017-04-21 |
| JP2017526856A (ja) | 2017-09-14 |
| US20170081985A1 (en) | 2017-03-23 |
| US10066516B2 (en) | 2018-09-04 |
| EP3186492B1 (de) | 2018-08-15 |
| DE102014216961A1 (de) | 2016-03-03 |
| WO2016029910A1 (de) | 2016-03-03 |
| CN106661968A (zh) | 2017-05-10 |
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