阅读说明：本技术 一种电动汽车车桥轴头及其加工工艺 (Axle head of electric automobile axle and machining process thereof ) 是由 刘登发 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种电动汽车车桥轴头及其加工工艺,包括中心孔,螺纹轴,轴承挡,端面台阶轴,中间法兰,右端台阶轴和右端台阶轴内孔,本发明中,中间法兰设置为梅花状,以减轻中间法兰的重量,并节省大量的材料；本发明中,右端台阶轴内孔开设在右端台阶轴内,有效的减轻了轴头的整体重量,使得轴头轻便化,运用到电动汽车上的时候能够起到节能减耗的效果；本发明中,加工工艺流程简单,易于保证轴头的加工精度,加工成本低,经济性能好。(The invention discloses an axle head of an electric automobile axle and a processing technology thereof, wherein the axle head comprises a central hole, a threaded shaft, a bearing block, an end surface step shaft, a middle flange, a right end step shaft and a right end step shaft inner hole; in the invention, the inner hole of the right-end stepped shaft is arranged in the right-end stepped shaft, so that the overall weight of the shaft head is effectively reduced, the shaft head is light and convenient, and the effects of energy conservation and consumption reduction can be achieved when the shaft head is applied to an electric automobile; according to the invention, the processing process flow is simple, the processing precision of the shaft head is easy to ensure, the processing cost is low, and the economic performance is good.)

1. The utility model provides an electric automobile axle spindle nose which characterized in that: the axle head of the electric automobile axle comprises a center hole (1), a threaded shaft (2), a bearing retainer (3), an end face step shaft (4), an intermediate flange (5), a right end step shaft (6) and a right end step shaft inner hole (7), wherein the center hole (1) is arranged at the left end shaft core position of the threaded shaft (2), and the arrangement depth of the center hole (1) is that

2. The axle stub shaft of an electric vehicle of claim 1, wherein: the middle flange (5) is arranged in a quincunx shape.

3. The processing technology of the axle head of the electric automobile axle is characterized in that: the processing technology of the axle head of the electric automobile axle comprises the following steps:

step 1: blanking, namely determining the diameter and the length of a bar to be blanked through calculation, and sawing the round bar into short materials on a sawing machine;

step 2: forging, namely forging the blanked short bar into a shaft head blank by adopting die forging;

and step 3: annealing, namely performing low-temperature stress relief annealing or artificial aging treatment on the forged blank;

and 4, step 4: rough machining, namely turning the end surfaces of each stepped shaft and the intermediate flange on a lathe, and reserving a finish machining allowance;

and 5: quenching and tempering;

step 6: finely turning the excircle and end face of each gear, turning threads, and turning the excircle of a bearing gear, wherein the residual grinding amount is 0.2-0.3;

and 7: the drill carriage is used for turning the excircle of the right-end stepped shaft, drilling the inner hole of the right-end stepped shaft, and turning the inner hole and the end face of the right-end stepped shaft;

and 8: grinding, namely positioning and clamping the excircle of the right-end stepped shaft and the right end face of the intermediate flange, pushing the tip into the central hole, and grinding the excircle of the bearing retainer to a specified size.

4. The processing technology of the axle head of the electric automobile according to claim 3, characterized in that: in the step 3, during annealing, the temperature for destressing the forged blank is 240-260 ℃.

5. The processing technology of the axle head of the electric automobile according to claim 3, characterized in that: and 5, quenching and tempering, namely, putting the roughly processed shaft head into a heat treatment furnace, heating to 870-880 ℃, preserving heat for 2.5-3 hours, cooling to 200 ℃ along with the furnace, taking out, and air-cooling to room temperature.

Technical Field

The invention relates to the technical field of automobile part processing, in particular to an axle head of an electric automobile axle and a processing technology thereof.

Background

The axle head on the existing electric automobile axle is a part at two ends of an axle tube of the electric automobile axle and is connected with the axle tube by welding, so that the axle head is required to bear certain bending moment and impact load.

However, the existing shaft head usually adopts a low-carbon steel forging part, and the forging part is usually solid, so that the structural weight is large, the weight of the whole axle is increased, and a large amount of materials and energy are wasted.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an axle head of an electric automobile and a processing technology thereof, and solves the problems that the existing axle head usually adopts a low-carbon steel forging part, the forging part is usually solid, the structural weight is large, the weight of the whole axle is increased, and a large amount of materials and energy are wasted.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the axle head of the electric automobile axle comprises a central hole, a threaded shaft, a bearing retainer, an end-face stepped shaft, an intermediate flange, a right-end stepped shaft and a right-end stepped shaft inner hole, wherein the central hole is arranged at the position of a left-end shaft core of the threaded shaft, and the arrangement depth of the central hole is

The threaded shaft, the bearing block, the end face step shaft, the middle flange and the right end step shaft are coaxially arranged; the left ends of the threaded shaft and the bearing block are both provided with 45-degree straight chamfers, wherein the length of the threaded shaft is 25; the fillet between the threaded shaft and the bearing block is

The diameter of the bearing block is

The length of the bearing block is 38.0 +/-0.2; the maximum diameter of the end surface step shaft is phi 62, and the minimum diameter of the end surface step shaft is phi 40; the diameter of the intermediate flange is phi 108, and the length of the intermediate flange is phi 108

4 middle flanges are evenly distributed at the radius R44The through-hole of (a); the fillet between the bearing block and the end surface step shaft is R2-R3; the round angle between the right end step shaft and the middle flange is R3, the diameter of the left end of the right end step shaft is phi 51 +/-0.2, and the diameter of the middle transition is phi 51 +/-0.2

Left end straightHas a diameter of

The length of the right end step shaft is 32.2; the inner hole of the right-end stepped shaft is arranged in the right-end stepped shaft, and the diameter of the inner hole of the right-end stepped shaft is

Which is provided with a depth of

The middle flange is arranged in a quincuncial shape.

The processing technology of the axle head of the electric automobile axle comprises the following steps:

step 1: blanking, namely determining the diameter and the length of a bar to be blanked through calculation, and sawing the round bar into short materials on a sawing machine;

step 2: forging, namely forging the blanked short bar into a shaft head blank by adopting die forging;

and step 3: annealing, namely performing low-temperature stress relief annealing or artificial aging treatment on the forged blank;

and 4, step 4: rough machining, namely turning the end surfaces of each stepped shaft and the intermediate flange on a lathe, and reserving a finish machining allowance;

and 5: quenching and tempering;

step 6: finely turning the excircle and end face of each gear, turning threads, and turning the excircle of a bearing gear, wherein the residual grinding amount is 0.2-0.3;

and 7: the drill carriage is used for turning the excircle of the right-end stepped shaft, drilling the inner hole of the right-end stepped shaft, and turning the inner hole and the end face of the right-end stepped shaft;

and 8: grinding, namely positioning and clamping the excircle of the right-end stepped shaft and the right end face of the intermediate flange, pushing the tip into the central hole, and grinding the excircle of the bearing retainer to a specified size.

In the step 3, during annealing, the temperature for destressing the forged blank is 240-260 ℃.

And 5, quenching and tempering, namely, putting the roughly processed shaft head into a heat treatment furnace, heating to 870-880 ℃, preserving heat for 2.5-3 hours, cooling to 200 ℃ along with the furnace, taking out, and air-cooling to room temperature.

(III) advantageous effects

The invention provides an axle head of an electric automobile axle and a processing technology thereof. The method has the following beneficial effects:

1. in the invention, the middle flange is arranged in a quincunx shape, so that the weight of the middle flange is reduced, and a large amount of materials are saved;

2. in the invention, the inner hole of the right-end stepped shaft is arranged in the right-end stepped shaft, so that the overall weight of the shaft head is effectively reduced, the shaft head is light and convenient, and the effects of energy conservation and consumption reduction can be achieved when the shaft head is applied to an electric automobile;

3. according to the invention, the processing process flow is simple, the processing precision of the shaft head is easy to ensure, the processing cost is low, and the economic performance is good.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a left side view of the structure of the present invention.

In the figure: 1 central hole, 2 threaded shafts, 3 bearing blocks, 4 end step shafts, 5 intermediate flanges, 6 right end step shafts and 7 right end step shaft inner holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.