CN110296820A - A kind of longitudinal composite material plate spring performance testing device and test method - Google Patents
A kind of longitudinal composite material plate spring performance testing device and test method Download PDFInfo
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- 238000004804 winding Methods 0.000 description 1
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Abstract
本发明公开了一种纵置复合材料板簧性能测试装置及测试方法。本发明的纵置复合材料板簧性能测试装置包括：基座，所述基座上两侧对称设置有一对导轨；一对滑动件，所述滑动件分别位于两侧的导轨上，且可相对导轨滑动；待测试板簧，所述待测试板簧的两端分别固定在两侧的滑动件上；转向加载装置，所述转向加载装置设置在待测试板簧的中部，载荷加载系统通过转向加载装置在不同方向上对待测试板簧进行测试。本发明的测试装置能够实现对复合材料板簧厚度、长度以及宽度方向上的疲劳性能全方位测试，更真实地反映复合材料板簧在车辆行驶过程中所受到的载荷的状况，获得更可靠的复合材料板簧疲劳寿命数据。
The invention discloses a performance testing device and a testing method for a vertical composite material leaf spring. The vertical composite material leaf spring performance testing device of the present invention includes: a base, on which a pair of guide rails are symmetrically arranged on both sides; The guide rail slides; the leaf spring to be tested, the two ends of the leaf spring to be tested are respectively fixed on the sliders on both sides; the steering loading device, the steering loading device is arranged in the middle of the leaf spring to be tested, and the load loading system passes the steering The loading device tests the leaf spring to be tested in different directions. The testing device of the present invention can realize all-round testing of the fatigue properties of the composite material leaf spring in the thickness, length and width directions, more truly reflect the load condition of the composite material leaf spring during the running of the vehicle, and obtain more reliable results. Fatigue life data for composite leaf springs.
Description
技术领域technical field
本发明涉及板簧检测技术领域,涉及一种纵置复合材料板簧性能测试装置及测试方法。The invention relates to the technical field of leaf spring detection, and relates to a performance testing device and a testing method for a vertical composite material leaf spring.
背景技术Background technique
随着全球能源紧缺及环境污染问题的日益突显，对汽车进行轻量化处理显得尤为重要。有研究表明如果汽车整车重量降低10％，则燃油效率可提高6％-8％，有效地减少二氧化碳排放。在汽车用零部件中，复合材料板簧的减重效果突出，与传统钢质板簧相比，横置板弹簧减重78％左右、轻型纵置板弹簧减重63％左右、重型纵置板弹簧减重66％～70％左右。此外，复合材料板簧的疲劳性能能够达到钢板板簧的2～10倍。由此可见，复合材料板簧在汽车工业领域具有广阔的应用前景。With the increasing global energy shortage and environmental pollution problems, it is particularly important to lighten vehicles. Studies have shown that if the vehicle weight is reduced by 10%, the fuel efficiency can be improved by 6%-8%, effectively reducing carbon dioxide emissions. In automotive parts, composite leaf springs have outstanding weight reduction effects. Compared with traditional steel leaf springs, the transverse leaf springs reduce the weight by about 78%, the light vertical leaf springs reduce the weight by about 63%, and the heavy vertical leaf springs reduce the weight by about 63%. The leaf spring reduces the weight by about 66% to 70%. In addition, the fatigue performance of composite leaf springs can reach 2 to 10 times that of leaf springs. It can be seen that composite leaf springs have broad application prospects in the automotive industry.
汽车在行驶过程中，板簧在不同路况下所经历的运动状态也会有所不同。在起伏路况状态下会产生上跳、下压运动，即板簧受到厚度方向上的载荷作用；在加速以及制动、减速过程中会对板簧长度方向产生挤压；另外，在汽车转向时板簧则会受到的宽度方向上的侧倾力。传统钢板弹簧疲劳测试方法大多是通过垂直方向的位移和载荷得到板簧的刚度以及垂直循环载荷作用下的疲劳寿命，作为各向同性的钢质板簧这种疲劳测试方式可靠性尚可。然对于复合材料板簧而言，由于其多是通过叠层热压、RTM成型或缠绕成型实现，导致复合材料板簧在各个方向上的各向异性，且层间剪切强度也不高。显然，传统钢板簧的疲劳测试方式已不适用于复合材料板簧的疲劳性能评价，难以预判复合材料板簧是否能够满足整车的要求。During the driving process of the car, the motion state experienced by the leaf spring under different road conditions will also be different. Under the condition of undulating road conditions, there will be upward jumping and downward pressing movements, that is, the leaf spring is subjected to the load in the thickness direction; during acceleration, braking and deceleration, the length direction of the leaf spring will be squeezed; in addition, when the car turns The leaf spring will be subjected to the roll force in the width direction. Most of the traditional leaf spring fatigue test methods obtain the stiffness of the leaf spring and the fatigue life under the vertical cyclic load through the displacement and load in the vertical direction. As an isotropic steel leaf spring, this fatigue test method is acceptable. However, for composite leaf springs, since they are mostly realized by lamination hot pressing, RTM molding or winding molding, the composite leaf springs are anisotropic in all directions, and the interlaminar shear strength is not high. Obviously, the fatigue test method of the traditional leaf spring is not suitable for the fatigue performance evaluation of the composite leaf spring, and it is difficult to predict whether the composite leaf spring can meet the requirements of the whole vehicle.
申请号为201610655823.7的中国专利公开了一种汽车纵置复合材料板簧性能测试装置，但只局限于复合材料板簧垂直方向上的疲劳测试，而不能检测其它方向上的性能。因此，需要开发适用于复合材料板簧全面进行疲劳性能测试的专用设备。The Chinese patent with the application number of 201610655823.7 discloses a performance testing device for the longitudinally mounted composite leaf spring of an automobile, but it is only limited to the fatigue test of the composite leaf spring in the vertical direction, and cannot detect the performance in other directions. Therefore, it is necessary to develop special equipment suitable for comprehensive fatigue performance testing of composite leaf springs.
复合材料板簧在汽车行驶过程中由于路况不同，其所受到的力也有所不同。在起伏路况状态下会产生上跳、下压，即复合材料板簧受到厚度方向上的载荷作用；在加速以及制动、减速过程中会对板簧长度方向产生挤压；另外，在汽车转向时板簧则会受到的宽度方向上的侧倾力。而现有钢板弹簧或复合材料板板簧只做简单的上下受力疲劳台架试验,考虑到复合材料板簧本身的各向异性特点，有必要对复合材料板簧的疲劳测试设备进行重新设计，从而实现对复合材料板簧厚度、长度以及宽度方向上的疲劳性能全方位测试，更真实地反映复合材料板簧在车辆行驶过程中所受到的载荷的状况，获得更可靠的复合材料板簧疲劳寿命数据。Due to different road conditions, the force of the composite leaf spring is also different during the driving of the car. Under the condition of undulating road conditions, there will be upward jumps and downward pressures, that is, the composite material leaf spring is subjected to the load in the thickness direction; during acceleration, braking and deceleration, the length direction of the leaf spring will be squeezed; in addition, when the car turns The rolling force in the width direction that the leaf spring will be subjected to. However, the existing leaf springs or composite leaf springs only do simple up and down fatigue bench tests. Considering the anisotropic characteristics of the composite leaf springs, it is necessary to redesign the fatigue testing equipment for the composite leaf springs. , so as to realize the comprehensive test of the fatigue performance of the composite material leaf spring in the thickness, length and width directions, more truly reflect the load condition of the composite material leaf spring during the driving process of the vehicle, and obtain a more reliable composite material leaf spring. Fatigue life data.
有鉴于此，特提出本发明。In view of this, the present invention is proposed.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题在于克服现有技术的不足，提供一种纵置复合材料板簧性能测试装置及测试方法。本发明的测试装置能够实现对复合材料板簧厚度、长度以及宽度方向上的疲劳性能全方位测试，更真实地反映复合材料板簧在车辆行驶过程中所受到的载荷的状况，获得更可靠的复合材料板簧疲劳寿命数据。The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a performance testing device and a testing method for a vertical composite leaf spring. The testing device of the invention can realize all-round testing of the fatigue properties of the composite material leaf spring in the thickness, length and width directions, more truly reflect the load condition of the composite material leaf spring during the running of the vehicle, and obtain more reliable results. Fatigue life data for composite leaf springs.
为解决上述技术问题，本发明采用技术方案的基本构思是：In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:
本发明的第一目的是提供一种纵置复合材料板簧性能测试装置，包括：The first object of the present invention is to provide a vertical composite material leaf spring performance testing device, including:
基座，所述基座上两侧对称设置有一对导轨；a base, a pair of guide rails are symmetrically arranged on both sides of the base;
一对滑动件，所述滑动件分别位于两侧的导轨上，且可相对导轨滑动；a pair of sliding pieces, the sliding pieces are respectively located on the guide rails on both sides and can slide relative to the guide rails;
待测试板簧，所述待测试板簧的两端分别固定在两侧的滑动件上；The leaf spring to be tested, the two ends of the leaf spring to be tested are respectively fixed on the sliders on both sides;
转向加载装置，所述转向加载装置设置在待测试板簧上，载荷加载系统通过转向加载装置在不同方向上对待测试板簧进行测试。A steering loading device, the steering loading device is arranged on the leaf spring to be tested, and the load loading system tests the leaf spring to be tested in different directions through the steering loading device.
进一步的方案，所述转向加载装置包括固定件和转向件，所述的固定件固定连接在待测试板簧的中部，所述转向件连接在固定件上，并可相对固定件转动。In a further solution, the steering loading device includes a fixing member and a steering member, the fixing member is fixedly connected to the middle of the leaf spring to be tested, and the steering member is connected to the fixing member and can rotate relative to the fixing member.
进一步的方案，所述转向件包括第一转向件和第二转向件，所述第一转向件与固定件连接，并可围绕与待测试板簧的中心轴平行的轴旋转；所述第二转向件与第一转向件连接，并可围绕与待测试板簧的中心轴垂直的轴旋转。In a further solution, the steering member includes a first steering member and a second steering member, the first steering member is connected with the fixing member and can rotate around an axis parallel to the central axis of the leaf spring to be tested; the second steering member is The steering member is connected with the first steering member and can rotate around an axis perpendicular to the central axis of the leaf spring to be tested.
进一步的方案，所述的第一转向件为转向法兰，所述的转向法兰水平设置在固定件上部，并围绕待测试板簧的中心轴沿顺时针和/或逆时针方向旋转；In a further solution, the first steering member is a steering flange, and the steering flange is horizontally arranged on the upper part of the fixing member, and rotates clockwise and/or counterclockwise around the central axis of the leaf spring to be tested;
优选的，所述的转向法兰每次旋转的角度为90度。Preferably, each rotation angle of the steering flange is 90 degrees.
进一步的方案，所述的第二转向件包括载荷输出杆，所述的载荷输出杆包括第一输出杆和第二输出杆，所述第一输出杆的一端与第一转向件固定连接，另一端与第二输出杆旋转连接；所述第二输出杆围绕与待测试板簧的中心轴垂直的轴沿顺时针和/或逆时针方向旋转；In a further solution, the second steering member includes a load output rod, the load output rod includes a first output rod and a second output rod, one end of the first output rod is fixedly connected with the first steering member, and the other One end is rotatably connected with the second output rod; the second output rod rotates clockwise and/or counterclockwise around an axis perpendicular to the central axis of the leaf spring to be tested;
优选的，所述第一输出杆与转向法兰垂直设置；Preferably, the first output rod is vertically arranged with the steering flange;
优选的，所述第二转向件还包括输出杆固定件，所述输出杆固定件安装在第一输出杆和第二输出杆的连接处，以固定两者的相对位置；Preferably, the second steering member further includes an output rod fixing member, and the output rod fixing member is installed at the connection between the first output rod and the second output rod to fix the relative positions of the two;
优选的，所述第二输出杆的自由延伸的端部设有加载点，所述加载点与载荷加载系统对接，优选的，所述加载点的直径大于第二输出杆的直径。Preferably, the freely extending end of the second output rod is provided with a loading point, the loading point is connected to the load loading system, and preferably, the diameter of the loading point is larger than the diameter of the second output rod.
进一步的方案，所述的基座上设有第一基座固定装置，通过第一基座固定装置将基座与待测试板簧长度方向平行的侧面与水平面固定；In a further solution, the base is provided with a first base fixing device, and the side surface parallel to the length direction of the base and the length direction of the leaf spring to be tested is fixed to the horizontal plane by the first base fixing device;
优选的，第一基座固定装置包括第一基座固定孔和第一基座固定件，第一基座固定孔设置在基座与待测试板簧长度方向平行的侧面上，第一基座固定件穿过第一基座固定孔与水平面固定。Preferably, the first base fixing device includes a first base fixing hole and a first base fixing member, the first base fixing hole is arranged on the side of the base parallel to the length direction of the leaf spring to be tested, and the first base The fixing piece is fixed to the horizontal plane through the fixing hole of the first base.
进一步的方案，所述的基座上设有第二基座固定装置，通过第二基座固定装置将基座与待测试板簧宽方向平行的侧面与水平面固定；In a further scheme, the base is provided with a second base fixing device, and the side surface parallel to the width direction of the base and the plate spring to be tested is fixed to the horizontal plane by the second base fixing device;
优选的，第二基座固定装置包括第二基座固定孔和第二基座固定件，第二基座固定孔设置在基座与待测试板簧宽度方向平行的侧面上，第二基座固定件穿过第二基座固定孔与水平面固定。Preferably, the second base fixing device includes a second base fixing hole and a second base fixing member, the second base fixing hole is arranged on the side of the base parallel to the width direction of the plate spring to be tested, and the second base The fixing piece is fixed to the horizontal plane through the fixing hole of the second base.
本发明的第二目的是提供一种如上任意一种方案或者组合方案所述的纵置复合材料板簧性能测试装置的测试方法，所述载荷加载系统与所述转向加载装置对接，通过调整转向加载装置的旋转角度和/或方向、基座与水平面的相对位置，在待测试板簧的长度、宽度以及厚度的方向上分别对待测试板簧进行性能测试；The second object of the present invention is to provide a method for testing the performance testing device for longitudinally placed composite leaf springs according to any one of the above solutions or the combined solution, wherein the load loading system is docked with the steering loading device, and the steering is adjusted by adjusting the steering The rotation angle and/or direction of the loading device, the relative position of the base and the horizontal plane, and the performance test of the leaf spring to be tested in the direction of the length, width and thickness of the leaf spring to be tested;
优选的，调整所述第一输出杆和第二输出杆均垂直于转向法兰并固定，所述基座水平放置，载荷加载系统与第二输出杆端部对接并施加载荷，在待测试板簧的厚度方向上进行测试。Preferably, the first output rod and the second output rod are adjusted to be perpendicular to the steering flange and fixed, the base is placed horizontally, the load loading system is butted with the end of the second output rod and a load is applied, on the board to be tested The test is carried out in the thickness direction of the spring.
进一步的方案，所述第一输出杆垂直于转向法兰，调整第二输出杆与转向法兰平行并与待测试板簧的长度方向一致并固定；调整基座，使基座的长度方向上与水平面垂直，并利用第二基座固定装置固定；载荷加载系统在待测试板簧的长度方向上进行测试。In a further scheme, the first output rod is perpendicular to the steering flange, and the second output rod is adjusted to be parallel to the steering flange and consistent with the length direction of the leaf spring to be tested and fixed; adjust the base so that the length direction of the base It is perpendicular to the horizontal plane and is fixed by the second base fixing device; the load loading system is tested in the length direction of the leaf spring to be tested.
进一步的方案，所述第一输出杆垂直于转向法兰，调整第二输出杆与转向法兰平行并固定，转动转向法兰，使第二输出杆与待测试板簧的宽度方向一致；调整基座，使基座的宽度方向上与水平面垂直，并利用第一基座固定装置固定；载荷加载系统在待测试板簧的宽度方向上进行测试。In a further scheme, the first output rod is perpendicular to the steering flange, the second output rod is adjusted to be parallel to the steering flange and fixed, and the steering flange is rotated to make the second output rod and the width direction of the leaf spring to be tested consistent; The base is made so that the width direction of the base is perpendicular to the horizontal plane, and is fixed by the first base fixing device; the load loading system is tested in the width direction of the leaf spring to be tested.
采用上述技术方案后，本发明与现有技术相比具有以下有益效果：After adopting the above-mentioned technical scheme, the present invention has the following beneficial effects compared with the prior art:
1、本发明提供的一种纵置复合材料板簧疲劳性能测试装置可实现在复合材料板簧厚度、长度以及宽度方向上的加载测试，对复合材料板簧施加循环载荷，并改变频率来模拟复合材料，能够较真实地模拟复合材料板簧在实际装车工况中所受到的力，具有较好的疲劳寿命可靠性。1. A longitudinal composite material leaf spring fatigue performance test device provided by the present invention can realize the loading test in the thickness, length and width directions of the composite material leaf spring, apply cyclic load to the composite material leaf spring, and change the frequency to simulate The composite material can more realistically simulate the force of the composite leaf spring in the actual loading condition, and has better fatigue life reliability.
2、本发明提供的一种纵置复合材料板簧疲劳性能测试装置可以配合传统钢质板簧疲劳测试台架使用，在原来测试台架的基础上，通过调整复合材料板簧疲劳性能测试装置中的载荷输出杆、转向法兰及基座的安装方式，实现不同方向上的疲劳性能测试，可操作性强，实现起来简单，并能够节约设备成本。2. The longitudinal composite material leaf spring fatigue performance test device provided by the present invention can be used in conjunction with the traditional steel leaf spring fatigue test bench. On the basis of the original test bench, the composite material leaf spring fatigue performance test device can be adjusted by adjusting The installation method of the load output rod, the steering flange and the base can realize the fatigue performance test in different directions, the operability is strong, the implementation is simple, and the equipment cost can be saved.
下面结合附图对本发明的具体实施方式作进一步详细的描述。The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
附图说明Description of drawings
附图作为本发明的一部分，用来提供对本发明的进一步的理解，本发明的示意性实施例及其说明用于解释本发明，但不构成对本发明的不当限定。显然，下面描述中的附图仅仅是一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:
图1所示为复合材料板簧厚度方向疲劳测试装置的侧面结构示意图。Figure 1 shows a schematic side view of the structure of the composite leaf spring fatigue test device in the thickness direction.
图2所示为复合材料板簧厚度方向疲劳测试装置的立体结构示意图。FIG. 2 is a schematic diagram of the three-dimensional structure of the fatigue testing device in the thickness direction of the composite leaf spring.
图3所示为复合材料板簧长度方向疲劳测试装置的侧面结构示意图。Figure 3 is a schematic side view of the structure of the longitudinal fatigue testing device for composite leaf springs.
图4所示为复合材料板簧长度方向疲劳测试装置的立体结构示意图。FIG. 4 is a schematic diagram of the three-dimensional structure of the longitudinal direction fatigue testing device of the composite leaf spring.
图5所示为复合材料板簧宽度方向疲劳测试装置的侧面结构示意图。FIG. 5 is a schematic side view of the structure of the fatigue testing device in the width direction of the composite leaf spring.
图6所示为复合材料板簧宽度方向疲劳测试装置的立体结构示意图。FIG. 6 is a schematic diagram of the three-dimensional structure of the fatigue testing device in the width direction of the composite leaf spring.
图中：1基座，2上导轨，3下导轨，4滑车，5车轮，6待测试板簧，7固定件，8转向法兰，9载荷输出杆，10第一输出杆，11第二输出杆，12输出杆固定件，13加载点，14第一基座固定装置，15第二基座固定装置，16吊耳连接销钉，17滑车固定螺栓。In the picture: 1 base, 2 upper guide rail, 3 lower guide rail, 4 pulley, 5 wheel, 6 leaf spring to be tested, 7 fixing piece, 8 steering flange, 9 load output rod, 10 first output rod, 11 second Output rod, 12 output rod fixing parts, 13 loading point, 14 first base fixing device, 15 second base fixing device, 16 lifting lug connecting pin, 17 pulley fixing bolt.
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.
在本发明的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.
本发明提供的一种纵置复合材料板簧性能测试装置，包括：A device for testing the performance of a vertical composite material leaf spring provided by the present invention includes:
基座1，所述基座1上两侧对称设置有一对导轨；A base 1, a pair of guide rails are symmetrically arranged on both sides of the base 1;
一对滑动件，所述滑动件分别位于两侧的导轨上，且可相对导轨滑动；a pair of sliding pieces, the sliding pieces are respectively located on the guide rails on both sides and can slide relative to the guide rails;
待测试板簧6，所述待测试板簧6的两端分别固定在两侧的滑动件上；The leaf spring 6 to be tested, the two ends of the leaf spring 6 to be tested are respectively fixed on the sliders on both sides;
转向加载装置，所述转向加载装置设置在待测试板簧6上，载荷加载系统通过转向加载装置在不同方向上对待测试板簧6进行测试。Steering loading device, the steering loading device is arranged on the leaf spring 6 to be tested, and the load loading system tests the leaf spring 6 to be tested in different directions through the steering loading device.
基座1的两侧对称设置有一对导轨，每个导轨均包括上导轨2和下导轨3。滑动件可以为滑车4或者其他可以与导轨相对滑动的结构，滑车4的下部具有车轮5。上导轨2和下导轨3为凹槽设计，可将滑车4的车轮5限定在上导轨2和下导轨3内，滑车4还可以随意取下和摆放到导轨上。待测试复合材料板簧两端的卷耳可以安装到对应的滑车4中，并可通过吊耳连接销钉16进行固定。A pair of guide rails are symmetrically arranged on both sides of the base 1 , and each guide rail includes an upper guide rail 2 and a lower guide rail 3 . The sliding member can be a pulley 4 or other structures that can slide relative to the guide rail. The lower part of the pulley 4 has wheels 5 . The upper guide rail 2 and the lower guide rail 3 are designed with grooves, which can confine the wheels 5 of the pulley 4 in the upper guide rail 2 and the lower guide rail 3. The pulley 4 can also be removed and placed on the guide rails at will. The roll ears at both ends of the composite leaf spring to be tested can be installed in the corresponding pulleys 4 and can be fixed by connecting pins 16 of the lifting lugs.
本方案的纵置复合材料板簧性能测试装置还包括转向加载装置，通过调节转向加载装置的方向，配合改变基座1的安装位置，能够实现对复合材料板簧厚度、长度以及宽度方向上的疲劳性能全方位测试，更真实地反映复合材料板簧在车辆行驶过程中所受到的载荷的状况，获得更可靠的复合材料板簧疲劳寿命数据。The vertical composite material leaf spring performance testing device of this solution also includes a steering loading device. By adjusting the direction of the steering loading device and changing the installation position of the base 1, the thickness, length and width directions of the composite material leaf spring can be adjusted. The comprehensive test of fatigue performance can more truly reflect the load condition of the composite leaf spring during vehicle driving, and obtain more reliable fatigue life data of the composite leaf spring.
所述转向加载装置包括固定件7和转向件，所述的固定件7固定连接在待测试板簧6的中部，所述转向件连接在固定件7上，并可相对固定件7转动。The steering loading device includes a fixing member 7 and a steering member. The fixing member 7 is fixedly connected to the middle of the leaf spring 6 to be tested. The steering member is connected to the fixing member 7 and can rotate relative to the fixing member 7 .
固定件7即为板簧固定装置，具体可以为板簧固定夹板，固定在待测试板簧的中部。板簧固定夹板包括上夹板和下夹板，上夹板和下夹板通过板簧固定螺栓进行固定。转向件连接在固定件7上，并且可相对固定件7转动，如此能够实现载荷加载系统在不同的方向上对转向件施力，进而传递到待测试板簧6上，对待测试板簧6的厚度、长度以及宽度方向上的疲劳性能都能够进行全方位测试。The fixing member 7 is a leaf spring fixing device, specifically a leaf spring fixing splint, which is fixed in the middle of the leaf spring to be tested. The leaf spring fixing splint includes an upper splint and a lower splint, and the upper splint and the lower splint are fixed by the leaf spring fixing bolts. The steering member is connected to the fixing member 7 and can be rotated relative to the fixing member 7, so that the load loading system can exert force on the steering member in different directions, and then transmit it to the leaf spring 6 to be tested. Fatigue performance in thickness, length and width directions can be tested in all directions.
其中，所述转向件包括第一转向件和第二转向件，所述第一转向件与固定件7连接，并可围绕与待测试板簧6的中心轴平行的轴旋转；所述第二转向件与第一转向件连接，并可围绕与待测试板簧6的中心轴垂直的轴旋转。Wherein, the steering member includes a first steering member and a second steering member, the first steering member is connected with the fixing member 7 and can rotate around an axis parallel to the central axis of the leaf spring 6 to be tested; the second steering member The steering member is connected with the first steering member and can rotate around an axis perpendicular to the central axis of the leaf spring 6 to be tested.
参照图1，所述的第一转向件为转向法兰8，所述的转向法兰8水平设置在固定件7上部，并围绕待测试板簧的中心轴沿顺时针和/或逆时针方向旋转。优选的，所述的转向法兰8每次旋转的角度为90度。Referring to FIG. 1, the first steering member is a steering flange 8, and the steering flange 8 is horizontally arranged on the upper part of the fixing member 7 and is clockwise and/or counterclockwise around the central axis of the leaf spring to be tested. rotate. Preferably, the angle of each rotation of the steering flange 8 is 90 degrees.
所述的第二转向件包括载荷输出杆9，所述的载荷输出杆9包括第一输出杆10和第二输出杆11，所述第一输出杆10的一端与第一转向件固定连接，另一端与第二输出杆11旋转连接；所述第二输出杆11围绕与待测试板簧6的中心轴垂直的轴沿顺时针和/或逆时针方向旋转0-90度；所述第一输出杆10与转向法兰8垂直设置。The second steering member includes a load output rod 9, the load output rod 9 includes a first output rod 10 and a second output rod 11, and one end of the first output rod 10 is fixedly connected with the first steering member, The other end is rotatably connected to the second output rod 11; the second output rod 11 rotates 0-90 degrees clockwise and/or counterclockwise around an axis perpendicular to the central axis of the leaf spring 6 to be tested; the first The output rod 10 is arranged perpendicular to the steering flange 8 .
所述第二转向件还包括输出杆固定件12，所述输出杆固定件12安装在第一输出杆10和第二输出杆11的连接处，以固定两者的相对位置。输出杆固定件12可以为输出杆固定螺钉。因此也可以说，载荷输出杆9的第二输出杆11可以输出杆固定螺钉为轴，顺时针、逆时针各旋转0-90度。The second steering member further includes an output rod fixing member 12, and the output rod fixing member 12 is installed at the connection between the first output rod 10 and the second output rod 11 to fix the relative positions of the two. The output rod fixing member 12 may be an output rod fixing screw. Therefore, it can also be said that the second output rod 11 of the load output rod 9 can be rotated by 0-90 degrees clockwise and counterclockwise respectively by using the output rod fixing screw as the axis.
因此，转向法兰8实现了整个转向件在水平方向内的旋转，并且能够同时带动载荷输出杆9进行同步的旋转。而载荷输出杆9的第一输出杆10和第二输出杆11可以相对在竖直方向内，围绕水平轴进行旋转，从而即可以调节实现第二输出杆11的方向与待测试板簧6的长度方向一致，也能够调节实现第二输出杆11的方向与待测试板簧6的宽度方向一致，有利于载荷加载系统与第二输出杆11对接后，在待测试板簧6的长度方向和宽度方向上进行施力检测。Therefore, the steering flange 8 realizes the rotation of the entire steering member in the horizontal direction, and can simultaneously drive the load output rod 9 to rotate synchronously. The first output rod 10 and the second output rod 11 of the load output rod 9 can rotate relative to the vertical direction around the horizontal axis, so that the direction of the second output rod 11 can be adjusted to achieve the relationship between the leaf spring 6 to be tested. The length direction is consistent, and the direction of the second output rod 11 can also be adjusted to be consistent with the width direction of the leaf spring 6 to be tested, which is beneficial to the connection between the load loading system and the second output rod 11. Force detection is performed in the width direction.
为了达到更好的对接施力检测的效果，所述第二输出杆11的自由延伸的端部设有加载点13，所述加载点13与载荷加载系统对接，优选的方案，所述加载点13的直径大于第二输出杆11的直径。In order to achieve a better effect of butt-force detection, the freely extending end of the second output rod 11 is provided with a loading point 13, and the loading point 13 is connected to the load loading system. Preferably, the loading point The diameter of 13 is larger than the diameter of the second output rod 11 .
本方案中，基座1的安装位置可根据复合材料板簧在不同方向上的不同测试要求而改变，基座1的四个侧面均可进行固定。为了对不同放置方式的基座1进行固定，基座1上设置多种固定装置，以便在各个位置都能够进行固定，具体方式包括：In this solution, the installation position of the base 1 can be changed according to different test requirements of the composite material leaf spring in different directions, and the four sides of the base 1 can be fixed. In order to fix the bases 1 with different placement methods, a variety of fixing devices are provided on the bases 1 so that they can be fixed at various positions. The specific methods include:
所述的基座1上设有第一基座固定装置14，通过第一基座固定装置14将基座1与待测试板簧6长度方向平行的侧面与水平面固定；The base 1 is provided with a first base fixing device 14, and the side surface parallel to the length direction of the base 1 and the lengthwise direction of the leaf spring 6 to be tested is fixed to the horizontal plane by the first base fixing device 14;
作为一种优选的实施方式，第一基座固定装置14包括第一基座固定孔和第一基座固定件，第一基座固定孔设置在基座1与待测试板簧6长度方向平行的侧面上，第一基座固定件穿过第一基座固定孔与水平面固定。As a preferred embodiment, the first base fixing device 14 includes a first base fixing hole and a first base fixing member, and the first base fixing hole is arranged on the base 1 parallel to the length direction of the leaf spring 6 to be tested. On the side of the base, the first base fixing member is fixed to the horizontal plane through the first base fixing hole.
所述的基座1上设有第二基座固定装置，通过第二基座固定装置将基座1与待测试板簧6宽度方向平行的侧面与水平面固定；The base 1 is provided with a second base fixing device, and the side surface parallel to the width direction of the base 1 and the plate spring 6 to be tested is fixed to the horizontal plane by the second base fixing device;
作为一种优选的实施方式，第二基座固定装置包括第二基座固定孔和第二基座固定件，第二基座固定孔设置在基座1与待测试板簧6宽度方向平行的侧面上，第二基座固定件穿过第二基座固定孔与水平面固定。As a preferred embodiment, the second base fixing device includes a second base fixing hole and a second base fixing member, and the second base fixing hole is arranged in the width direction of the base 1 parallel to the width direction of the plate spring 6 to be tested. On the side surface, the second base fixing member is fixed to the horizontal plane through the second base fixing hole.
本方案的测试装置可以在同一基座1上，通过改变载荷输出杆9的第二输出杆11的状态、转向法兰8的角度以及基座1的相对位置从而实现复合材料板簧在不同路况下的疲劳测试。The test device of this scheme can be on the same base 1, by changing the state of the second output rod 11 of the load output rod 9, the angle of the steering flange 8 and the relative position of the base 1, so as to realize the composite material leaf spring in different road conditions. Fatigue test under.
当不对第二输出杆11进行旋转，用输出杆固定螺钉将第一输出杆10和第二输出杆11进行固定，使第二输出杆11与转向法兰8垂直，最后调整基座1的放置位置，使复合材料板簧在长度方向上与水平面呈平行放置，调整位置使加载点13与伺服液压驱动系统进行对接，如图1所示。之后再进行加载并通过第二输出杆11开始施加载荷，如此便可对复合材料板簧厚度方向上的疲劳性能进行测试。When the second output rod 11 is not rotated, fix the first output rod 10 and the second output rod 11 with the output rod fixing screw, so that the second output rod 11 is perpendicular to the steering flange 8, and finally adjust the placement of the base 1 position, so that the composite material leaf spring is placed parallel to the horizontal plane in the longitudinal direction, and the position is adjusted so that the loading point 13 is connected to the servo hydraulic drive system, as shown in Figure 1. After that, the load is applied again and the load is applied through the second output rod 11, so that the fatigue performance of the composite material leaf spring in the thickness direction can be tested.
当第二输出杆11旋转90度后，用输出杆固定螺钉将第一输出杆10和第二输出杆11进行固定，再旋转转向法兰8，使第二输出杆11与复合材料板簧的长度方向平行，最后调整基座1的放置位置，使复合材料板簧在长度方向上与水平面呈垂直放置，调整位置使加载点13与伺服液压驱动系统进行对接，并利用第二基座固定孔和第二基座固定件(长度方向疲劳测试时)将基座1进行固定，如图3所示。另外，将与施加载荷方向同向一端的滑车4用滑车固定螺栓17固定，之后再进行加载并通过第二输出杆11开始施加载荷，如此便可对复合材料板簧长度方向上的疲劳性能进行测试。When the second output rod 11 is rotated 90 degrees, the first output rod 10 and the second output rod 11 are fixed with the output rod fixing screw, and then the steering flange 8 is rotated to make the second output rod 11 and the composite material leaf spring The length direction is parallel. Finally, adjust the placement position of the base 1 so that the composite material leaf spring is perpendicular to the horizontal plane in the length direction. Adjust the position so that the loading point 13 is connected to the servo hydraulic drive system, and the second base fixing hole is used. and the second base fixing member (during the fatigue test in the longitudinal direction) to fix the base 1, as shown in Figure 3. In addition, the pulley 4 at one end in the same direction as the load application direction is fixed with the pulley fixing bolt 17, and then the load is applied and the second output rod 11 starts to apply the load, so that the fatigue performance of the composite material leaf spring in the longitudinal direction can be evaluated. test.
当第二输出杆11旋转90度后，用输出杆固定螺钉将第一输出杆10和第二输出杆11进行固定，再旋转转向法兰8，使第二输出杆11与复合材料板簧的宽度方向平行，最后调整基座1的放置位置，使复合材料板簧在宽度方向上与水平面垂直放置，调整位置使加载点13与伺服液压驱动系统进行对接，并利用第一基座固定孔和第一基座固定件(宽度方向疲劳测试时)将基座1进行固定，如图5所示。另外，将两端的滑车4用滑车固定螺栓17进行固定，之后再进行加载并通过第二输出杆11开始施加载荷，如此便可对复合材料板簧宽度方向上的疲劳性能进行测试。When the second output rod 11 is rotated 90 degrees, the first output rod 10 and the second output rod 11 are fixed with the output rod fixing screw, and then the steering flange 8 is rotated to make the second output rod 11 and the composite material leaf spring The width direction is parallel. Finally, adjust the placement position of the base 1 so that the composite material leaf spring is placed perpendicular to the horizontal plane in the width direction. The first base fixing member (during the fatigue test in the width direction) fixes the base 1, as shown in FIG. 5 . In addition, the pulleys 4 at both ends are fixed with pulley fixing bolts 17, and then the load is applied and the load is applied through the second output rod 11, so that the fatigue performance of the composite leaf spring in the width direction can be tested.
另外，本发明还提供一种如上任意一种方案或者组合方案所述的纵置复合材料板簧性能测试装置的测试方法，具体包括如下：In addition, the present invention also provides a method for testing the performance testing device for longitudinally placed composite leaf springs as described in any one of the above solutions or a combination of solutions, which specifically includes the following:
所述载荷加载系统与所述转向加载装置对接，通过调整转向加载装置的旋转角度和/或方向、基座1与水平面的相对位置，在待测试板簧6的长度、宽度以及厚度的方向上分别对待测试板簧6进行性能测试，能够实现对复合材料板簧厚度、长度以及宽度方向上的疲劳性能全方位测试，更真实地反映复合材料板簧在车辆行驶过程中所受到的载荷的状况，获得更可靠的复合材料板簧疲劳寿命数据。The load loading system is docked with the steering loading device, and by adjusting the rotation angle and/or direction of the steering loading device, the relative position of the base 1 and the horizontal plane, in the direction of the length, width and thickness of the leaf spring 6 to be tested The performance test of the leaf spring 6 to be tested can be carried out to realize the comprehensive test of the fatigue performance of the composite leaf spring in the thickness, length and width directions, and more truly reflect the load condition of the composite leaf spring during the driving process of the vehicle. , to obtain more reliable fatigue life data of composite leaf springs.
具体的，测试情况及方法包括以下几种：Specifically, the test situations and methods include the following:
情况1，当模拟复合材料板簧在起伏路况状态下产生上跳、下压运动的疲劳性能时，由于复合材料板簧主要受到厚度方向上的载荷作用，此时需施加连续、循环的厚度方向力。Case 1, when simulating the fatigue performance of the composite leaf spring with up-jump and down-pressing movements under undulating road conditions, since the composite leaf spring is mainly subjected to the load in the thickness direction, it is necessary to apply a continuous and cyclic thickness direction at this time. force.
测试步骤为：The test steps are:
调整所述第一输出杆10和第二输出杆11均垂直于转向法兰8并固定，所述基座1水平放置，载荷加载系统与第二输出杆11端部对接并施加载荷，在待测试板簧6的厚度方向上进行测试，如图1所示。The first output rod 10 and the second output rod 11 are adjusted to be perpendicular to the steering flange 8 and fixed, the base 1 is placed horizontally, and the load loading system is docked with the end of the second output rod 11 to apply a load. The test is performed in the thickness direction of the leaf spring 6 , as shown in FIG. 1 .
具体的，将两个滑车4装入上导轨2与下导轨3之间，滑车4能够在上导轨2与下导轨3之间自由滑动。将待测试复合材料板簧两端卷耳安装到对应的滑车4中，此时可不需吊耳连接销钉16进行固定；将待测试复合材料板簧的中央部位通过板簧固定装置固定并与转向法兰8连接，转向法兰8顶部的第二输出杆11垂直于转向法兰8方向进行安装，并用输出杆固定螺钉进行固定；基座1水平方向放置，之后可以进行加载并通过第二输出杆11开始施加载荷。Specifically, two pulleys 4 are installed between the upper guide rail 2 and the lower guide rail 3 , and the pulley 4 can slide freely between the upper guide rail 2 and the lower guide rail 3 . Install the lugs at both ends of the composite leaf spring to be tested into the corresponding pulleys 4, at this time, the connecting pins 16 of the lifting lugs are not required for fixing; the central part of the composite leaf spring to be tested is fixed by the leaf spring fixing device and connected to the steering wheel. Flange 8 is connected, the second output rod 11 on the top of steering flange 8 is installed perpendicular to the direction of steering flange 8, and is fixed with the output rod fixing screw; the base 1 is placed horizontally, and can be loaded and passed through the second output The rod 11 begins to apply the load.
此时试验载荷范围为0.7倍满载载荷-1.9倍满载载荷，频率范围为0.1-3Hz。疲劳测试过程中就时刻观察复合材料板簧状况，若复合材料板簧出现裂纹、分层或断裂等情况，即可停止试验，同时记录其循环次数，即为复合材料板簧的疲劳寿命。At this time, the test load range is 0.7 times the full load load -1.9 times the full load load, and the frequency range is 0.1-3Hz. During the fatigue test, the condition of the composite leaf spring is always observed. If the composite leaf spring has cracks, delamination or fracture, the test can be stopped, and the number of cycles is recorded at the same time, which is the fatigue life of the composite leaf spring.
情况2，当模拟复合材料板簧在加速以及制动、减速过程中的疲劳性能时，由于复合材料板簧主要受到其长度方向上的载荷作用，此时需施加连续、循环的长度方向力。In case 2, when simulating the fatigue performance of the composite leaf spring during acceleration, braking and deceleration, since the composite leaf spring is mainly subjected to the load in its longitudinal direction, a continuous and cyclic longitudinal force is required at this time.
测试步骤为：The test steps are:
所述第一输出杆10垂直于转向法兰8，调整第二输出杆11与转向法兰8平行并与待测试板簧6的长度方向一致并固定；调整基座1，使基座1的长度方向上与水平面垂直，并利用第二基座固定装置固定；载荷加载系统在待测试板簧6的长度方向上进行测试。The first output rod 10 is perpendicular to the steering flange 8, and the second output rod 11 is adjusted to be parallel to the steering flange 8 and consistent with the length of the leaf spring 6 to be tested and fixed; The longitudinal direction is perpendicular to the horizontal plane, and is fixed by the second base fixing device; the load loading system is tested in the longitudinal direction of the leaf spring 6 to be tested.
具体的，将两个滑车4装入上导轨2与下导轨3之间，滑车4能够在上导轨2与下导轨3之间自由滑动。将与施加载荷方向同向一端的滑车4用滑车固定螺栓17固定；将待测试复合材料板簧两端卷耳安装到对应的滑车4中，并用吊耳连接销钉16进行固定；将待测试复合材料板簧的中央部位通过板簧固定装置固定并与转向法兰8连接，转向法兰8顶部的第二输出杆11转向平行于转向法兰8的方向进行安装，并用输出杆固定螺钉进行固定；调整基座1，使基座1的长度方向上与水平面垂直放置，并利用第二基座固定孔和第二基座固定件(长度方向疲劳测试时)将基座1进行固定，如图3所示。将与施加载荷方向同向一端的滑车4用滑车固定螺栓17固定；之后可以进行加载并通过第二输出杆11开始施加载荷。Specifically, two pulleys 4 are installed between the upper guide rail 2 and the lower guide rail 3 , and the pulley 4 can slide freely between the upper guide rail 2 and the lower guide rail 3 . Fix the pulley 4 at one end in the same direction as the applied load direction with the pulley fixing bolts 17; install the roll ears at both ends of the composite leaf spring to be tested into the corresponding pulley 4, and use the lifting lug connecting pins 16 for fixing; The central part of the material leaf spring is fixed by the leaf spring fixing device and connected with the steering flange 8. The second output rod 11 on the top of the steering flange 8 is turned parallel to the direction of the steering flange 8 for installation, and is fixed with the output rod fixing screw. ; Adjust the base 1 so that the length direction of the base 1 is perpendicular to the horizontal plane, and use the second base fixing hole and the second base fixing piece (during the fatigue test in the length direction) to fix the base 1, as shown in the figure 3 shown. Fix the pulley 4 at one end in the same direction as the direction of applying the load with the pulley fixing bolt 17 ; after that, the load can be applied and the load can be applied through the second output rod 11 .
此时试验载荷范围为0.7倍满载载荷-1.9倍满载载荷，频率范围为0.1-3Hz。疲劳测试过程中就时刻观察复合材料板簧状况，若复合材料板簧出现裂纹、分层或断裂等情况，即可停止试验，同时记录其循环次数，即为复合材料板簧的疲劳寿命。At this time, the test load range is 0.7 times the full load load -1.9 times the full load load, and the frequency range is 0.1-3Hz. During the fatigue test, the condition of the composite leaf spring is always observed. If the composite leaf spring has cracks, delamination or fracture, the test can be stopped, and the number of cycles is recorded at the same time, which is the fatigue life of the composite leaf spring.
情况3，当模拟复合材料板簧在汽车转向时受到侧倾力的疲劳性能时，由于复合材料板簧主要受到宽度方向上的载荷作用，此时需施加连续、循环的宽度方向力。Case 3, when simulating the fatigue performance of the composite leaf spring subjected to the roll force when the vehicle is turning, since the composite leaf spring is mainly subjected to the load in the width direction, a continuous and cyclic width direction force needs to be applied at this time.
测试步骤为：The test steps are:
所述第一输出杆10垂直于转向法兰8，调整第二输出杆11与转向法兰8平行并固定，转动转向法兰8，使第二输出杆11与待测试板簧6的宽度方向一致；调整基座1，使基座1的宽度方向上与水平面垂直，并利用第一基座固定装置14固定；载荷加载系统在待测试板簧6的宽度方向上进行测试。The first output rod 10 is perpendicular to the steering flange 8, the second output rod 11 is adjusted to be parallel to the steering flange 8 and fixed, and the steering flange 8 is rotated to make the second output rod 11 and the width direction of the leaf spring 6 to be tested. Consistent; adjust the base 1 so that the width direction of the base 1 is perpendicular to the horizontal plane, and is fixed by the first base fixing device 14 ; the load loading system is tested in the width direction of the leaf spring 6 to be tested.
具体的，将两个滑车4装入上导轨2与下导轨3之间，滑车4能够在上导轨2与下导轨3之间自由滑动。将待测试复合材料板簧两端卷耳安装到对应的滑车4中，并用吊耳连接销钉16进行固定；将待测试复合材料板簧的中央部位通过板簧固定装置固定并与转向法兰8连接，转向法兰8顶部的第二输出杆11转向平行于转向法兰8的方向进行安装，并用输出杆固定螺钉进行固定；调整转向法兰8旋转90度并固定；调整基座1，使基座1在宽度方向上与水平面垂直放置，使此时的第二输出杆11垂直于水平面，并利用第一基座固定孔和第一基座固定件(宽度方向疲劳测试时)将基座1进行固定，如图5所示。将两端的滑车4用滑车固定螺栓17进行固定；之后可以进行加载并通过第二输出杆11开始施加载荷。Specifically, two pulleys 4 are installed between the upper guide rail 2 and the lower guide rail 3 , and the pulley 4 can slide freely between the upper guide rail 2 and the lower guide rail 3 . Install the roll ears at both ends of the composite leaf spring to be tested into the corresponding pulleys 4, and fix them with lifting lug connecting pins 16; fix the central part of the composite leaf spring to be tested through the leaf spring fixing device and connect it with the steering flange 8 Connect, the second output rod 11 on the top of the steering flange 8 is turned parallel to the direction of the steering flange 8 for installation, and is fixed with the output rod fixing screw; adjust the steering flange 8 to rotate 90 degrees and fix it; adjust the base 1 to make The base 1 is placed perpendicular to the horizontal plane in the width direction, so that the second output rod 11 at this time is perpendicular to the horizontal plane, and the base is fixed by the first base fixing hole and the first base fixing piece (during the fatigue test in the width direction). 1 for fixing, as shown in Figure 5. The pulleys 4 at both ends are fixed with pulley fixing bolts 17 ; after that, loading can be carried out and the load can be applied through the second output rod 11 .
此时试验载荷范围为0.7倍满载载荷-1.9倍满载载荷，频率范围为0.1-3Hz。疲劳测试过程中就时刻观察复合材料板簧状况，若复合材料板簧出现裂纹、分层或断裂等情况，即可停止试验，同时记录其循环次数，即为复合材料板簧的疲劳寿命。At this time, the test load range is 0.7 times the full load load -1.9 times the full load load, and the frequency range is 0.1-3Hz. During the fatigue test, the condition of the composite leaf spring is always observed. If the composite leaf spring has cracks, delamination or fracture, the test can be stopped, and the number of cycles is recorded at the same time, which is the fatigue life of the composite leaf spring.
以上所述仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专利的技术人员在不脱离本发明技术方案范围内，当可利用上述提示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明方案的范围内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.
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Application publication date: 20191001 |