Method for producing a piston for an internal combustion engine and piston for an internal combustion engine
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A manufacturing method and internal combustion engine technology, applied in the direction of pistons, manufacturing tools, machines/engines, etc., can solve problems such as inability to achieve welded connections, and achieve the effect of improving welded connections
Inactive Publication Date: 2013-05-22
MAHLE INT GMBH
View PDF7 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] In this method, after the induction coil is removed, the mating surface starts to cool down, so an optimal solder connection cannot be achieved
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] Figures 1 to 4 A first embodiment of the method according to the invention according to the piston 10 is shown. The piston 10 in this embodiment is a two-part box piston with surrounding cooling channels. The invention is of course also applicable to other piston types.
[0031] The piston 10 is composed of a piston upper part 11 and a piston lower part 12, which can be made of steel or cast iron by casting or forging. The piston 10 has a piston bottom 13 with a combustion chamber cavity 14 , wherein the piston bottom 13 and the combustion chamber cavity 14 are partly formed by the piston upper part 11 and partly by the piston lower part 12 . The fire lands and annular grooves along the outer wall region 18 are not shown for reasons of visibility. The lower piston part 12 has a piston skirt 15 and a piston hub 16 with hub bores 17 for receiving piston bolts (not shown).
[0032] The upper piston part 11 has an inner abutment surface 21 and an outer abutment surface...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a method for producing a piston (10, 110, 210) for an internal combustion engine, characterized by the following steps: a) producing an upper piston part (11, 111, 211) having at least one joining surface (21, 22; 121, 122), b) producing a lower piston part (12, 112, 212) having at least one joining surface (23, 24; 123, 124), c) establishing a direct contact between the at least one joining surface (21, 22; 121, 122) of the upper piston part (11, 111, 211) and the at least one joining surface (23, 24; 123, 124) of the lower piston part (12, 112, 212), d) heating the upper piston part (11, 111, 211) and the lower piston part (12, 112, 212) in the region of the joining surfaces (21, 23; 22, 24; 121, 123; 122, 124) brought in direct contact by induction or by a direct current flow through the joining surfaces (21, 23; 22, 24; 121, 123; 122, 124), and (e) connecting the upper piston part (11, 111, 211) and the lower piston part (12, 112, 212) to form a piston (10, 110, 210) by means of a pressing process and optionally finishing the piston (10, 110, 210).
Description
technical field [0001] The invention relates to a method of manufacturing a piston for an internal combustion engine. Background technique [0002] Such methods are described, for example, in document US Pat. No. 6,825,450 B2. The upper piston part and the lower piston part are joined together by induction welding, wherein an induction coil is placed between the joining surfaces of the upper piston part and the lower piston part. After heating the joint surfaces, the induction coil is removed and the weld is produced. [0003] In this method, after the induction coil is removed, the mating surfaces start to cool down, so that an optimal solder connection cannot be achieved. Furthermore, the method must be carried out in a protective atmosphere in order to avoid adverse effects or adverse changes of the heated joining surfaces due to reactions with oxygen in the air. Contents of the invention [0004] It is an object of the present invention to provide a method for produ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more