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Hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and quenching method

A quenching sensor and transition fillet technology, which is applied in the field of auto parts processing, can solve the problem that the two journals cannot be heated evenly, and achieve the effects of avoiding melting, preventing tempering, and reducing heating efficiency

Inactive Publication Date: 2021-04-06
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a simultaneous quenching inductor with dual journals and transition fillets of a hollow stepped shaft, and also relates to its quenching method to solve the problem of using a single-circle inductor for quenching in two processes, overheating and melting at the edges and corners of steps, and the use of double-circle parallel connection The sensor heats and quenches the two stepped journals at the same time, and the two journals cannot be heated evenly

Method used

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  • Hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and quenching method
  • Hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and quenching method
  • Hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and quenching method

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Effect test

Embodiment 1

[0060] Such as Figure 2-Figure 6 As shown, the double journal of the hollow stepped shaft and the simultaneous quenching inductor of the transition fillet of the present invention include: the first annular effective ring 1 with a rectangular cross-section made of a 10X9X1.5 copper tube, and the short-circuit tube made of a 10X9X1.5 copper tube 18. Use 12X6X1.5 copper tubes to remake the second-shaped effective circle with an approximate parallelogram cross-section. 2. Two confluence tubes 9 and two transition tubes made of 12X10X1.5 copper tubes. 17. Use Ф 12X1.5 copper tubes for control The completed sensor cooling water pipe joint 7, two left and right symmetrical contact plates made of 5 mm thick copper plate 8, the water spray ring fixing plate made of 5 mm thick copper plate 14 The inductor composed of copper brazing conducts electricity Circuit: use 14X9X1.5 copper tube to remake the first ring-shaped quenching water spray ring with a rectangular cross-section and a 30...

Embodiment 2

[0072] Step 1: Put the part to be processed with the balance weight and place the journal part upwards on the fixture at the lower top of the machine tool, press the start button, and the part to be processed will start to rotate;

[0073] Step 2: After the part rotates for 3 seconds, the sensor moves to the static preheating position at a speed of 3000mm / min, heats for 2 seconds, stops heating for 3 seconds, reheats for 1 second, and moves to the rounded corner static heating position at a speed of 160mm / min ;

[0074] Step 3: Heating at the rounded corner for 7 seconds, spraying water while the sensor quickly moves up 10mm at a speed of 5000mm / min to the second static heating position, and heating for 1 second;

[0075] Step 4: The sensor moves to the end position of the quenching zone at a speed of 200mm / min, stops heating, and at the same time, the sensor quickly moves up 10mm at a speed of 5000mm / min to the static water spray position, sprays water for 30 seconds, stops t...

Embodiment 3

[0078] Step 1: Put the part to be processed with the balance weight and place the journal part upwards on the fixture at the lower top of the machine tool, press the start button, and the part to be processed will start to rotate;

[0079] Step 2: After the part rotates for 3 seconds, the sensor moves to the static preheating position at a speed of 3000mm / min, heats for 1.8 seconds, stops heating for 2 seconds, reheats for 1.2 seconds, and moves to the rounded corner static heating position at a speed of 180mm / min ;

[0080] Step 3: Heating at the rounded corner for 8 seconds, while spraying water, the sensor quickly moves up 12mm at a speed of 5000mm / min to the second static heating position, and heating for 1.2 seconds;

[0081] Step 4: The sensor moves to the end position of the quenching zone at a speed of 180mm / min, and stops heating. At the same time, the sensor moves rapidly upwards at a speed of 5000mm / min by 12mm to the static water spray position, and sprays water fo...

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Abstract

The invention relates to a hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and a quenching method. The quenching inductor is composed of a conductive loop, a main water spraying ring and an auxiliary water spraying ring, and the conductive loop, the main water spraying ring and the auxiliary water spraying ring are fastened together through nylon bolts and brass nuts after being subjected to insulation treatment. According to the hollow stepped shaft double-journal and transition fillet simultaneous quenching inductor and the quenching method, a method of combining a preheating process, sectional static heating quenching and continuous heating quenching is adopted at the same time, induction quenching of two adjacent journals and fillets of a part is achieved, effective hardened layers are evenly and continuously distributed, and the quenching quality meets the using performance requirement. The problems that a single-ring sensor is used for quenching in two procedures, and the edges and corners of steps are molten due to overheating are solved. The problem that the two journals cannot be uniformly heated when the two stepped journals are simultaneously heated and quenched by adopting a double-ring parallel sensor is also solved. The quenching inductor is simple in structure and easy to manufacture, and the quenching method has the advantages of being convenient and flexible in process adjustment, high in equipment flexibility degree, low in process cost and the like.

Description

technical field [0001] The invention belongs to the technical field of auto parts processing, and in particular relates to a double-circle series reverse current fillet quenching inductor without magnetic conduction material and a quenching method thereof, in particular to a hollow stepped shaft with two adjacent journals and a transition fillet at the same time Inductor for heating and quenching and its quenching method. Background technique [0002] Four-wheel drive passenger car nodular cast iron rear stepped shaft needs to install bearings and oil seals on two adjacent journals ( and ) for induction hardening to improve wear resistance. In order to meet the requirements of bending fatigue resistance, the transition fillet (R2) of two adjacent journals requires continuous distribution of effective hardened layer, which is very technically difficult. [0003] Quenching is divided into two processes using a single-circle inductor. Due to the influence of the structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/667C21D1/10C21D9/00
CPCC21D1/667C21D1/10C21D9/0068Y02P10/25
Inventor 孙超王达鹏马廷涛陈博吴宁姜波郭鑫孙冠男左伟民孙小海
Owner CHINA FIRST AUTOMOBILE
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