A kind of remanufacturing method of steel piston

A steel piston, remanufacturing technology, applied in the field of engine friction pair repair, can solve the problem of waste of resources and other issues

Active Publication Date: 2019-08-30
强莉莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Affected by the concept that the fatigue life of traditional aluminum piston materials is limited and the piston is difficult to repair, the repair of the engine friction pair is limited to the three major parts of the cylinder liner, connecting rod, and crankshaft. A large number of steel structure pistons are discarded during maintenance, which causes This wastes a huge amount of resources, especially the large quantities of all-steel structure pistons used in Euro VI or China VI high-speed diesel engines. This waste is particularly obvious.

Method used

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  • A kind of remanufacturing method of steel piston
  • A kind of remanufacturing method of steel piston
  • A kind of remanufacturing method of steel piston

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 and figure 2 As shown, the first embodiment of the remanufacturing method of the steel piston of the present invention, the steel piston includes a piston head 1 and a piston skirt 2, the piston head 1 is provided with a combustion chamber 11 and a top plane 12, and the piston head 1 The ring side is provided with spaced fire bank 13 and ring bank 14, a ring groove 15 is formed between the fire bank 13, the ring bank 14 and the adjacent ring bank 14, and the piston skirt 2 is provided with an inner cavity 21 and a through pin hole 22 , the bottom end of the piston skirt 2 is provided with an outer seam 23, comprising the following steps:

[0057] S1: Initial cleaning: Clean the steel piston to be repaired to remove oil stains and other stains;

[0058]S2: Clamping for the first time: Clamping and fixing the steel piston based on the bottom diameter of one of the ring grooves 15 and the top plane 12;

[0059] S3: Repair the outer seam 23: remove mate...

Embodiment 2

[0074] Figure 3 to Figure 5 The second embodiment of the remanufacturing method of the steel piston of the present invention is shown, the steel piston comprises a piston head 1 and a piston skirt 2, the piston head 1 is provided with a combustion chamber 11 and a top plane 12, the piston head 1 The ring side is provided with spaced fire bank 13 and ring bank 14, a ring groove 15 is formed between the fire bank 13, the ring bank 14 and the adjacent ring bank 14, and the piston skirt 2 is provided with an inner cavity 21 and a through pin hole 22 , the bottom end of the piston skirt 2 is provided with an outer seam 23, comprising the following steps:

[0075] S1: Initial cleaning: Clean the steel piston to be repaired to remove oil stains and other stains;

[0076] S2: Clamping for the first time: Clamping and fixing the steel piston based on the bottom diameter of one of the ring grooves 15 and the top plane 12;

[0077] S3: Machining the internal positioning reference: mac...

Embodiment 3

[0094] Figure 5 to Figure 7 The third embodiment of the remanufacturing method of the steel piston of the present invention is shown, the remanufacturing method is basically the same as Embodiment 2, the only difference is that in this embodiment, in step S3, the two sides of the top of the cavity 21 are The inner positioning part 211 is processed on the side, and the inner positioning part 211 is an inner stop structure. Adopting the internal stop structure, the clamping and positioning of the steel piston can be completed by using the tooling to extend to the inner cavity 21 and withstand the inner stop and cooperate with the top plane 12, and the operation is convenient.

[0095] In this embodiment, in step S3, milling is used to process the inner spigot. Milling is adopted, and the processing is simple and easy to realize.

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Abstract

The invention discloses a remanufacturing method of a steel piston. One method comprises the following steps of S1, primarily cleaning; S2, clamping for the first time; S3, repairing a male end; S4, clamping for the second time; S5, reducing a volume of a combustion chamber; S6, clamping for the third time; S7, repairing a steel piston ring side; S8, clamping for the fourth time; S9, repairing a pin hole; S10, cleaning after repairing; and S11, packaging. The other method comprises the following steps of S1, primarily cleaning; S2, clamping for the first time; S3, processing an inner positioning basis; S4, clamping for the second time; S5, repairing the male end; S6, clamping for the third time; S7, reducing the volume of the combustion chamber; S8, clamping for the fourth time; S9, repairing the steel piston ring side; S10, clamping for the fifth time; S11, repairing the pin hole; S12, cleaning after repairing; and S13, packaging. The remanufacturing method of the steel piston provided by the invention has the advantages of low maintenance cost, and capabilities of preventing resource waste, prolonging the service life of the steel piston, and repairing and processing in batch.

Description

technical field [0001] The invention mainly relates to the repairing technology of the motor friction pair, in particular to a remanufacturing method of a steel piston. Background technique [0002] Pistons are one of the key components for diesel engine emission upgrades, and steel structure pistons to replace aluminum structure pistons are an important means for vehicle diesel engines to meet the emission and fuel economy requirements of National VI and higher standards. At present, the main raw materials used in steel pistons include: first, cast iron (steel) materials, such as: QT-600, HT300, ZG25CrMo, etc.; second, medium carbon alloy structural steel, such as: 40Cr, 42CrMo, 42CrMoA, etc.; third, hot pressure processing Use non-quenched and tempered steel, such as: F38MnVS (38MnVS6) and so on. Among them: 42CrMoA and F38MnVS exhibit excellent comprehensive economic and technical characteristics, and are widely used. Piston manufacturing process route: forging (casting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/02
Inventor 强莉莉
Owner 强莉莉
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