阅读说明：本技术 一种减震弹簧及其制备方法和应用 (Damping spring and preparation method and application thereof ) 是由 张爱敏 耿贵立 高学平 张芦元 孙国勋 于 2019-09-27 设计创作，主要内容包括：本发明提供一种减震弹簧及其制备方法和应用,属于汽车装备制造技术领域。本发明通过对现有减震弹簧材料材质及制备工艺进行改进,使得本发明制备的得到的减震弹簧其弹簧系数K值能够随路况自动变化,在保证了驾乘舒适性的基础上,同时又保证了极好的操控性,从而有效满足人们对驾乘舒适性和操控性的共同要求,因此具有良好的实际应用之价值。(The invention provides a damping spring and a preparation method and application thereof, and belongs to the technical field of automobile equipment manufacturing. According to the invention, the material and the preparation process of the existing damping spring material are improved, so that the spring coefficient K value of the damping spring prepared by the invention can automatically change along with road conditions, and the excellent controllability is ensured on the basis of ensuring the driving comfort, thereby effectively meeting the common requirements of people on the driving comfort and the controllability, and having good practical application value.)

1. The damping spring is characterized in that the damping spring is obtained by processing and molding a titanium alloy wire, then heating the titanium alloy wire and cooling the titanium alloy wire.

2. The damping spring according to claim 1, wherein the titanium alloy wire is made of a titanium-nickel alloy.

3. The damper spring according to claim 1, wherein the titanium-nickel alloy has a transformation point As ≦ 50 ℃.

4. The damper spring according to claim 1, wherein the titanium-nickel alloy wire is a cold-drawn wire.

5. A method for manufacturing a damper spring according to any one of claims 1 to 4, characterized by comprising: processing and molding the titanium alloy wire to prepare the damping spring; heating the damping spring; and cooling the shock absorption spring after the heating treatment.

6. The method of claim 5, wherein the method further comprises polishing or coloring the cooled damper spring.

7. The preparation method according to claim 5, wherein the titanium alloy wire is made of a titanium-nickel alloy;

the phase transition point As of the titanium-nickel alloy is less than or equal to-50 ℃;

the titanium-nickel alloy wire is a cold-drawn wire.

8. The method according to claim 5, wherein the heat treatment is carried out at 495-500 ℃ for 10-14 min; preferably, the heating device is a vacuum heating device.

9. The method according to claim 5, wherein the cooling process is performed by using liquid nitrogen, and the damper spring is cooled in the liquid nitrogen for 5 to 10 minutes.

10. Use of a damping spring according to any one of claims 1 to 4 in a damping system for a motor vehicle; the application is preferably as a shock absorbing spring for a motor vehicle.

Technical Field

The invention belongs to the technical field of automobile equipment manufacturing, and particularly relates to a damping spring and a preparation method and application thereof.

Background

The information disclosed in this background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

The damping system of the existing automobiles, especially cars, is composed of a damping cylinder and a damping spring. The spring coefficient K of the damping spring is a fixed value once the structural parameters and the material of the damping spring are determined. To change the value of the spring constant K, the structural parameters or the material of the damping spring must be changed, which is not possible at all during the driving of the vehicle.

When the spring structures are the same, the increase of the K value can cause the increase of the hardness of the spring, and the increase of the hardness can reduce the driving comfort; the K value reduces the spring to be soft, and the controllability is also reduced although the driving comfort is improved. Therefore, the automobile damping spring with the spring coefficient capable of automatically changing along with road conditions is obtained to meet the common requirements of people on driving comfort and controllability, and becomes a problem to be solved urgently in the field of automobile damping.

Disclosure of Invention

Aiming at the defects in the prior art and meeting the common requirements of people on driving comfort and controllability, the invention provides the automobile titanium alloy damping spring with the spring coefficient capable of automatically changing along with road conditions, and the preparation method and the application thereof.

The invention provides a damping spring, which is obtained by processing and molding a titanium alloy wire, then heating the processed titanium alloy wire, and cooling the processed titanium alloy wire.

The titanium alloy wire is made of a titanium-nickel alloy;

the phase transition point As of the titanium-nickel alloy is less than or equal to-50 ℃;

the titanium-nickel alloy wire is a cold-drawn wire.

In a second aspect of the present invention, there is provided a method for manufacturing the above damper spring, the method comprising: processing and molding the titanium alloy wire to prepare the damping spring; heating the damping spring; and cooling the shock absorption spring after the heating treatment.

Further, the preparation method of the damping spring further comprises polishing or coloring the cooled damping spring.

The titanium alloy wire is made of a titanium-nickel alloy;

the phase transition point As of the titanium-nickel alloy is less than or equal to-50 ℃;

the titanium-nickel alloy wire is a cold-drawn wire.

The heating treatment condition is 495-500 ℃, and the temperature is kept for 10-14 minutes; further preferably, the heating equipment is vacuum heating equipment, so that the heating treatment effect is better;

the cooling treatment can adopt a liquid nitrogen treatment mode, and specifically, the damping spring is placed in liquid nitrogen to be cooled for 5-10 minutes.

In a third aspect of the invention, the application of the damping spring in a damping system of an automobile is provided. The application is further an application as a shock absorbing spring for automobiles.

After the processing and treatment, no matter the automobile or the intelligent car runs on the extremely hot equator or runs on the cold north, even in the desert river with forty degrees below zero, the phase state of the damping spring of the intelligent car is in the parent phase state, namely the damping spring is in the high-hardness state. When the road surface is uneven, namely when the car is vibrated or bumped, the parent phase of the damping spring of the intelligent car can be automatically transformed into martensite under the action of external vibration or bumping force. Because the martensite is a softer phase state than the parent phase, the spring coefficient K automatically decreases along with the road condition and generates deformation, the external force of vibration or jolt is absorbed, and the vibration or jolt is avoided. When the external force of vibration or bumping is eliminated, namely the road surface is flattened, the damping spring of the intelligent car can be automatically converted from the martensite with soft hardness into the parent phase with high hardness, the spring coefficient K at the moment can be automatically changed from small to large along with the road condition, the original K value is restored, and the deformation caused by the vibration or bumping is eliminated. If the road conditions are changing, the above process is also changing. Therefore, the driving comfort is ensured, and the excellent controllability is also ensured.

The invention has the beneficial technical effects that:

the invention has simple preparation process, good economical efficiency and low cost, and can be applied on the basis of the original tooling equipment. Meanwhile, the spring coefficient of the prepared damping spring can automatically change along with road conditions, and the excellent controllability is ensured on the basis of ensuring the driving comfort. The invention effectively solves the technical problem that the K value of the spring coefficient is difficult to automatically change along with road conditions, thereby further improving the life quality of people. Therefore, it has good practical application value.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The present invention will now be further described with reference to specific examples, which are provided for the purpose of illustration only and are not intended to be limiting. If the experimental conditions not specified in the examples are specified, the conditions are generally as usual or as recommended by the reagents company; reagents, consumables and the like used in the following examples are commercially available unless otherwise specified.

As mentioned above, the damping system of the automobiles used by people at present, especially the cars, is composed of a damping cylinder and a damping spring. The spring coefficient K of the damping spring is a fixed value once the structural parameters and the material of the damping spring are determined. To change the value of the spring constant K, the structural parameters or the material of the damping spring must be changed, which is not possible at all during the driving of the vehicle.

In view of the above, one embodiment of the present invention provides a damping spring, which is obtained by performing a heating process on a titanium alloy wire after the titanium alloy wire is formed, and performing a cooling process. The damping spring prepared by the invention has the spring coefficient K value which can automatically change along with road conditions, and ensures excellent controllability on the basis of ensuring driving comfort.

The titanium alloy wire is made of a titanium-nickel alloy;

the phase transition point As of the titanium-nickel alloy is less than or equal to-50 ℃;

the titanium-nickel alloy wire is a cold-drawn wire.

In another embodiment of the present invention, there is provided a method for manufacturing the damper spring, including: processing and molding the titanium alloy wire to prepare the damping spring; heating the damping spring; and cooling the shock absorption spring after the heating treatment.

In another embodiment of the present invention, the method for manufacturing the damper spring further comprises polishing or coloring the cooled damper spring.

In another embodiment of the present invention, the titanium alloy wire is made of a titanium-nickel alloy;

in still another embodiment of the invention, the phase transition point As of the titanium-nickel alloy is less than or equal to-50 ℃; furthermore, the temperature of As is less than or equal to-51 ℃, the temperature of As is less than or equal to-52 ℃ or the temperature of As is less than or equal to-53 ℃.

In still another embodiment of the present invention, the titanium-nickel alloy wire rod is a cold-drawn wire rod.

In another embodiment of the present invention, the heating treatment condition is 495-; further preferably, the heating equipment is vacuum heating equipment, so that the treatment effect is better;

in another embodiment of the present invention, the cooling process may be performed by using liquid nitrogen, and the damping spring is cooled in the liquid nitrogen for 5 to 10 minutes.

In still another embodiment of the present invention, there is provided a use of the above-described damper spring in a damping system for an automobile. The application is further an application as a shock absorbing spring for automobiles.

The invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are test methods in which specific conditions are indicated, and are generally carried out under conventional conditions.