EP2934786A1 - Verfahren zur herstellung eines kolbens und zugehöriger kolben - Google Patents
Verfahren zur herstellung eines kolbens und zugehöriger kolbenInfo
- Publication number
- EP2934786A1 EP2934786A1 EP13801527.6A EP13801527A EP2934786A1 EP 2934786 A1 EP2934786 A1 EP 2934786A1 EP 13801527 A EP13801527 A EP 13801527A EP 2934786 A1 EP2934786 A1 EP 2934786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- collar
- region
- transition region
- cooling channel
- 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.)
- Ceased
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 230000007704 transition Effects 0.000 claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000000641 cold extrusion Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims description 2
- 238000005476 soldering Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
- B21K1/185—Making machine elements pistons or plungers with cooling channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
Definitions
- the invention relates to a method for producing a cooling channel piston for an internal combustion engine, which has a cooling channel in its piston head, wherein the piston crown a piston base with Koibennaben, bolt holes and Kolben2020ften connects, initially a piston blank with a radially projecting in the region of the piston crown and circumferential collar and is manufactured with a Aniage Scheme for the collar in the transition region between the piston crown and the piston lower part, wherein the collar is then deformed in such a way until the outer radial circumferential edge comes almost or completely to rest with the investment area. Furthermore, the invention relates to a cooling channel piston.
- the cooling channel piston has a cooling channel in its piston bottom, wherein the piston bottom is followed by a piston lower part with piston hubs, bolt holes and piston shanks.
- a piston blank is first produced with a collar protruding radially in the region of the piston crown, the collar subsequently being shaped, wherein a contact region for the collar is formed in a transition region between the piston crown and the piston base and the collar is shaped in this way is until its outer radial circumferential edge very close or completely comes to rest on the investment area to a closed Cooling channel to form.
- a positive connection can be formed between the collar and the abutment region by providing the end face of the collar with a groove which is pressed over a correspondingly shaped bead in the abutment region during forming of the collar (or vice versa).
- the collar is inextricably connected in the contact area with the Koibenrohling, in particular by a soldering, welding, gluing or other method.
- Another disadvantage is that the welding and soldering processes are very complex, especially in difficult or impossible to weld steels. Furthermore, the soldering, welding or bonding process is complicated and time-consuming.
- the object of the invention is to produce a piston with a cooling channel, which is simple and inexpensive to produce. Furthermore, the object is to avoid the above-mentioned disadvantages.
- the object is achieved in that shortly before or after the concerns at least a portion of the Kolbenrohüngs is plastically deformed such that the collar and the contact area are conditionally releasably or permanently connected to each other, so that forms a completely closed cooling channel.
- the cooling channel piston is simple, quick and inexpensive to produce, since additional mating manufacturing processes such as welding, soldering or gluing are not necessary in the context of production. Furthermore, it is advantageous to produce a dense cooling channel by means of the plastic deformation.
- the collar is reshaped until its outer, radially encircling edge comes almost or completely into abutment with the abutment region. Under a nearly come to the plants is understood that the edge has a distance from the investment area. When fully come to rest, at least the surface of the edge touches the abutment area.
- the outer radial circumferential edge may be completely circumferential, as a certain portion or with a plurality of portions having a distance from each other, be circumferential.
- At least a portion of the cooling channel alcohol is plastically deformed shortly before or after the application.
- Plastic deformation shortly before contact is to be understood as meaning that at least one region of the piston blank is simultaneously also plastically deformed in contrast to plastic deformation according to which at least one region of the piston blank is understood to be first of all Collar is deformed and then at least a portion of the piston blank is plastically deformed.
- the collar and the abutment region are connected to one another in a conditionally releasable or non-detachable manner.
- a conditional solubility is to be understood according to the invention that the collar and the contact area under effort with possibly occurring damage of the collar and contact area are releasable again.
- a non-detachable connection of the collar and investment area is to be understood according to the invention that collar and contact area can be solved only by complete destruction of collar and contact area from each other.
- the collar in particular the outer radial circumferential edge of the collar, is preferably plastically deformed.
- the collar is preferably plastically deformed by means of a forming tool warm and / or cold.
- a region of the transition region is preferably plastically deformed.
- the transition region having the abutment region can be deformed together with the abutment region or without the abutment region, so that once the abutment region is plastically deformed together with the transition region and once only the transition region without abutment region.
- the contact area is preferably plastically deformed.
- the investment area is part of the transition area.
- the plastic deformation is preferably generated by the action of force, in particular by means of compressive force.
- force By the piston blank is plastically deformed by force in the preferred range, the cooling channel can be completely closed, so that it is sealed after the plastic deformation.
- the force acting on the piston blank can be generated for example by means of a tool. It is possible that the force is applied at any angle to the central axis of the piston blank, wherein at a force application to the piston crown, the force is preferably applied perpendicular to the piston crown surface, that is parallel to the central axis, as a compressive force on the piston blank and a force application is applied to the piston lower part preferably perpendicular or at a steep angle to the central axis as a compressive force on the piston blank.
- the plastic deformation is preferably produced by means of forming, in particular cold forming with cold extrusion presses. Alternatively or additionally, hot forming with hot extrusion presses is also possible.
- the forming material is preferably pressed into the contact area. This makes it possible for the collar and the abutment region to be connected to one another by means of the forming so that both are releasably or non-releasably connected to one another by means of the pressed-in material.
- a region of the collar, in particular the outer, radially encircling edge of the collar, and / or an area of the collar are preferred Transition region compressed.
- the collar is preferably made at its outer radial peripheral edge with a step preferably a conical step, a spring, a groove, a slope and / or an undercut.
- the transition region is preferably made with a step, preferably a conical step, a groove, a spring, a bevel and / or a nose.
- the collar and the abutment region can be combined particularly well with one another by means of the plastic deformation by virtue of their geometric configuration.
- the contact area is designed as a negative shape of the collar.
- a step is to be understood as meaning that the shape of the collar and / or the transitional region are designed in the manner of a step.
- the surface of the step is conical at least in one region.
- the shape of the collar and / or the transition region also have several stages, so that there is a stepped shape.
- the surface of the cone on the collar and / or the transition region may also be formed curved, wherein the Kochgansbe can be formed rich with level and without stage.
- a slope is meant a linear deviation of the surface to another surface of the cooling channel piston, wherein the surface of the slope itself can be designed as well as curved.
- the collar and the transition region each have a slope so that the slope of the collar and the transition region are respectively corresponding.
- Under an undercut is a geometric configuration of the collar to understand, by means of which the collar is easily brought into abutment in at least a portion of its edge with the contact area.
- the edge after forming the collar with increasing distance from the central axis of the piston at an increasing distance from the contact area is easily brought into abutment in at least a portion of its edge with the contact area.
- the edge after forming the collar with increasing distance from the central axis of the piston at an increasing distance from the contact area Preferably, the shape of the contact area corresponds to the shape of the undercut.
- the invention relates to adekanalkoiben, which is prepared by the method according to the invention or one of its preferred embodiments.
- the cooling channel piston produced by means of the method according to the invention or one of its preferred embodiments consists in a preferred embodiment of steel, aluminum or aluminum alloy.
- FIG. 1 shows a finished coolant channel piston for an internal combustion engine
- FIG. 2 a cooling channel piston as a blank
- FIG. 3 shows a cooling channel piston during production
- FIG. 4 shows a section of a piston in the region of the collar and contact area
- Figure 5 a section of an alternative piston in the region of the collar and contact area
- Figure 6 a section of an alternative piston in the collar and abutment area.
- FIG. 1 shows a ready-made cooling channel piston 1 for an internal combustion engine.
- thedekanalkoiben 1 is shown in section such that the left of the lifting axis of thedekanalkolbens 1 shown view of thedekanaikolbens 1 is a side view and the right of the lifting axis of thedekanalkolbens 1 shown a 90 ° rotated side view of the cooling channel piston 1.
- the lifting axis corresponds in the embodiment of the central axis of the cooling channel piston.
- the cooling channel piston 1 consists in the embodiment of steel and is used in passenger cars (cars) and commercial vehicles (commercial vehicles).
- the cooling channel piston 1 has, in its piston crown 2, a cooling channel 3 which is completely surrounded radially around the stroke axis.
- the piston head 2 is also known by the term piston upper part.
- a piston lower part 4 adjoins the piston head 2, which has two piston hubs 5, two bolt holes 6 and piston shanks 7.
- the piston head 2 also has a combustion bowl 8 and a ring field 16.
- a piston blank V is first produced.
- Such a piston blank 1 ' is shown in Figure 2, left side of the central axis of the Kolbenrohiings 1 ' this in section in a side view and the right side of the central axis of the piston blank 1 ' in a rotated by 90 ° Side view is shown in section.
- the same components are provided in Figure 2 with the same reference numerals and new components are provided with new reference numerals.
- the piston blank is produced, for example, by means of a machining process such as turning or milling.
- the piston blank 1 ' has according to Figure 2 in the region of the Koibêt 2 a radially projecting and completely circumferential collar 9.
- the piston blank Y has a transition region 10, which is located between the piston head 2 and the piston lower part 3.
- a contact region 11 for the collar 9 is arranged in the region of the transitional region 10, according to FIG. 2, the transition region 10 is located in the region of the upper edge of the upper end of the later-produced cooling channel piston 1.
- the Koibenrohling 1 ' according to Figure 2 on a bulge between the collar 9 and transition region 10 for (hereinafter shown) Hersander of the cooling channel 3.
- a region of the outer radially circumferential edge 12 completely comes to rest according to FIG. 3 for contact with the abutment region 1 1. After reshaping the collar 9, the deformed coarse blank V thus has a cooling channel 3.
- Figure 4 shows a section of a Koibenrohlings 1 ' in section, which Mitteis a preferred embodiment to adekanaikolben 1 is produced.
- the same components are provided in Figure 4 with the same reference numerals and new components are provided with new reference numerals.
- the piston blank 1 ' has been produced in the region of the collar 9 at the outer edge 12, which runs radially around the center axis of the piston blank und, and in the region of the transition region 10, which extends radially in the central axis, with geometrical configurations.
- the manufactured collar 9 of the piston blank ⁇ has an undercut 13, which is produced by the fact that the edge 12 of the collar 9 is inclined at an angle ⁇ according to FIG.
- Such an undercut 13 can be produced, for example, by means of a tool for machining, for example by means of a turning tool in the form of a turning tool of a lathe.
- the transition region 10 produced has a step 14, the lower region of which has a bevel 15 which is inclined by the angle ⁇ and which is corresponding to the undercut 13 of the collar 9.
- Such a bevel 14 can also be produced, for example, by means of a tool for machining, for example a turning tool.
- the edge 12 of the collar 9 may be made as a conical step surrounding the central axis corresponding to the transitional area 10 by forming the transitional area 10 as a corresponding conical step and thus forming the negative shape of the edge 12 (not shown in FIG ).
- the collar 9 has already been reshaped from its initial position by means of forces acting in the direction of the deformation B1 by a certain range.
- the starting position of the collar 9 corresponds to the position which has the similar collar 9 according to FIG.
- the piston blank 1 ' After complete deformation of the collar 9 in the direction of deformation B1, the piston blank 1 'has a shape approximately according to FIG.
- FIGS. 5 and 6 show the further particularly preferred, alternative embodiment for producing a cooling channel piston 1 for an internal combustion engine.
- FIGS. 5 and 6 each show different geometric configurations of the collar 9 and of the transition cover 10 of a piston blank, wherein the piston blank V is shown in section as a detail in side view.
- the collar 9 produced as part of the production of the piston blank V has, at its edge 12, a spring 17 which revolves radially around the central axis.
- the transition region 10 produced in the context of the production of the piston blank 1 ' has a groove 18 which corresponds to the spring 17 and whose surface forms part of the contact region 11.
- the collar 9 is reshaped with a force in the form of a compressive force in the direction of the deformation B1, so that the edge 12 of the collar 9 approaches the abutment region 11 according to FIG.
- a compressive force is exerted on the piston blank 1 ' , preferably perpendicular to the center axis of the piston blank 1 ' in the direction of force B2, so that by means of this force material of the Koibenrohlings V is pressed into the contact area 11 by means of forming.
- material is pressed into the abutment region 11 from the piston lower part 4 in the direction of the piston head 2, that is from bottom to top, with the material being located around the abutment region 11 in the transition region 10.
- the spring 17 of the collar 9 and the groove 18 of the contact area 1 1 are each compressed, with a completely closed cooling channel is formed by the plastic deformation and the resulting compression, in addition, the spring 17 inseparable from the groove 18th is connected. Further, the other portions of the outer radial peripheral edge 12 are compressed.
- the edge 12 of the collar 9 in the further exemplary embodiment according to FIG. 6 has an undercut 13 which rotates radially around the central axis.
- the transition region 10 has a radially around the central axis rotating stage 14.
- the lower portion of the step 14 is designed conically according to FIG. According to FIG. 6, a part of the step 14 includes the contact region 1 1.
- the piston blank 1 ' in the transition region 10 has a nose 19, which runs radially around the central axis, on the outside of the piston blank 1 ' .
- the piston blank V according to FIG. 6 in this case has a position according to FIG. 3, which corresponds to the position represented dashed in FIG.
- the force in the direction of force B2 has, according to FIG. 6, a steep angle to the central axis.
- the piston blank 1 ' is further processed.
- the ring field 16 is introduced according to Figure 1 in the piston head 2, for example by means of a cutting tool.
- further processing steps for producing the combustion bowl 8 and bolt holes 6 and the finishing and finishing of the piston shanks 7 are carried out, so that after the production ofmékanaikolben 1 by way of example an embodiment according to FIG.
- the reference numeral 20 basically an internal connecting web is designated, which connects the upper part of the piston (piston head 2) with the lower part (piston lower part 4 including piston skirt).
- the surface of the cone on the collar 9 and / or the transition region 10 can also be curved (see FIG. 7: here, the abutment region 11 and the edge 12 are correspondingly curved, ie the transition region 10 is provided with a step 14 and an adjoining one curved area 1 1 and the collar 9 made with a correspondingly adapted curved edge 12), where alternatively the transition region 10 both with stage 14 (see again Figure 7) and without stage (see Figure 8: here goes the connecting web 20 without stage, ie flush in the contact area 11, ie the transition area 10 is flush from the connecting web 20 in a subsequent curved contact area 1 1 merging and the collar 9 made with a correspondingly adapted curved edge 12) may be formed.
- the length of the collar 9 is of course chosen so that its edge 12 comes to rest on the contact area 11 when the collar 9 is deformed.
- its edge 9 comes so on the contact area 1 1 to the plant that on the one hand no gap is formed and the collar 9 is supported on the piston shaft 7, on the other hand must be ensured by the choice of lengths that the edge 12 of the collar 9 with the deformation can also create at the Aniage Scheme 10.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012224231.7A DE102012224231A1 (de) | 2012-12-21 | 2012-12-21 | Verfahren zur Herstellung eines Kolbens und zugehöriger Kolben |
| PCT/EP2013/075308 WO2014095332A1 (de) | 2012-12-21 | 2013-12-03 | Verfahren zur herstellung eines kolbens und zugehöriger kolben |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2934786A1 true EP2934786A1 (de) | 2015-10-28 |
Family
ID=49724568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13801527.6A Ceased EP2934786A1 (de) | 2012-12-21 | 2013-12-03 | Verfahren zur herstellung eines kolbens und zugehöriger kolben |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2934786A1 (de) |
| DE (1) | DE102012224231A1 (de) |
| WO (1) | WO2014095332A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH230566A (de) * | 1942-03-24 | 1944-01-15 | Mahle Kg | Verfahren zur Herstellung von geschmiedeten Kolben für Brennkraftmaschinen. |
| DE1103698B (de) * | 1959-10-23 | 1961-03-30 | Schmidt Gmbh Karl | Durch Schmieden oder Pressen hergestellter Kolben, vorzugsweise aus einer Aluminium-legierung fuer Brennkraftmaschinen und Kompressoren |
| DE3713191C1 (en) * | 1986-12-24 | 1988-07-14 | Mahle Gmbh | Method for the manufacture of a forged head of a two-part piston for internal combustion engines |
| EP1452250B1 (de) * | 2003-03-01 | 2008-11-12 | KS Kolbenschmidt GmbH | Herstellungsverfahren für einen Kühlkanalkolben mit umformbarem Bund |
| DE102004031513A1 (de) | 2004-06-30 | 2006-01-26 | Ks Kolbenschmidt Gmbh | Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine |
| DE102007027337B4 (de) * | 2007-06-14 | 2009-07-30 | Ks Kolbenschmidt Gmbh | Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine |
-
2012
- 2012-12-21 DE DE102012224231.7A patent/DE102012224231A1/de not_active Ceased
-
2013
- 2013-12-03 WO PCT/EP2013/075308 patent/WO2014095332A1/de not_active Ceased
- 2013-12-03 EP EP13801527.6A patent/EP2934786A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014095332A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012224231A1 (de) | 2014-06-26 |
| WO2014095332A1 (de) | 2014-06-26 |
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