Combined loading device for material strength test

Abstract

The invention discloses a combined loading device for a material strength test. Comprising a vertical load loading assembly, and two tangential load loading assemblies are connected with the vertical load loading assembly through connecting rods and symmetrically arranged on the two sides of the vertical load loading assembly; transverse connecting beams are arranged at the two ends of the vertical load loading assembly, and a plurality of connecting holes at equal intervals are formed in the transverse connecting beams; the tangential load loading assembly is provided with a tangential load loading rod, and a plurality of connecting holes are formed in the tangential load loading rod at equal intervals; each connecting rod is a plate structure connecting piece, connecting holes are formed in the two ends of each connecting rod at equal intervals, and the two ends of each connecting rod are detachably and vertically connected with the transverse connecting beam and the tangential load loading rod through round pins respectively. According to the device, modular design and flexible assembly are adopted, stepless adjustment assembly is achieved through the connecting rod mechanism, flexible test loading which is high in freedom degree, capable of being combined and capable of conducting strength distribution can be conducted through the device, and the requirements for performance parameter test detection and strength assessment of complex parts are met.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment design, in particular to the technical field of component strength detection equipment design, and relates to a combined loading device for material strength testing. Background Art

[0002] In the current conventional component strength test, the component performance parameter test device is mainly used to assess the vertical and lateral rigidity and fatigue strength of the component. Usually, an integral or integrated test fixture is used to directly contact the test component for performance parameter testing. However, the integral or integrated test fixture will impose a certain degree of constraint on the rigidity of the component during the strength test. At the same time, it is difficult for this type of fixture to take into account both rigid strength tests and fatigue strength tests. In order to study the design strength and durability of components, it is extremely important to test the performance parameters of components. Therefore, a flexible test loading device with high degree of freedom, combinability and strength distribution is needed to meet the requirements of component performance parameter testing. Summary of the invention

[0003] In view of the above problems, the present invention discloses a combined loading device for material strength test. The purpose of the present invention is to provide a flexible test loading device with high degree of freedom, combinability and strength distribution, so as to meet the needs of testing and strength assessment of more complex component performance parameter tests.

[0004] The present invention is achieved through the following technical solutions:

[0005] A combined loading device for material strength test, comprising an experimental platform, a loading device fixed on the experimental platform, characterized in that the loading device comprises: one vertical load loading component, and two tangential load loading components respectively connected to the vertical load loading component through connecting rods and symmetrically arranged on both sides of the vertical load loading component;

[0006] The vertical load loading component has transverse connecting beams at both ends, and a plurality of equally spaced connecting holes are arranged on the transverse connecting beams;

[0007] The tangential load loading component is provided with a tangential load loading rod, and a plurality of equally spaced connecting holes are provided on the tangential load loading rod;

[0008] The connecting rods are all plate structure connecting parts, and equally spaced connecting holes are set at both ends. The two ends of the connecting rods are detachably connected to the transverse connecting beam and the tangential load loading rod through round pins.

[0009] Further, the vertical load loading component includes a vertical loading seat, a transverse connecting beam, a bolt hole and a connecting hole; wherein the vertical loading seat is welded on the transverse connecting beam, and is connected to a power source through the bolt hole on the vertical loading seat, and the power source is used to drive the vertical load loading component to move vertically; the connecting hole set on the transverse connecting beam is vertically connected to the connecting rod through a round pin.

[0010] Furthermore, a vertical positioning seat is arranged under the vertical loading seat of the vertical load loading composition, and the vertical positioning seat is composed of two mutually parallel vertical plates and a bottom plate vertically welded; a circular hole is arranged on the vertical plate and is connected and fixed to the transverse connecting beam of the vertical loading beam through a round pin; a positioning hole of a through hole structure is arranged in the center of the bottom plate, which is used for sliding cooperation with a vertically arranged vertical upright pole so that the vertical loading seat can only move up and down in a limited vertical direction.

[0011] Further, the tangential load loading component includes a fixed base, a fixed shaft pin, a tangential load loading seat, a tangential load loading rod, an upper wedge block and a lower wedge block; wherein, a baffle is welded and fixed on the side of the tangential load loading seat, the tangential load loading rod is installed in the baffle, and the tangential load loading rod is fixed by the upper wedge block and the lower wedge block, and then the tangential load loading seat is installed on the fixed base through a round pin, and the fixed base and the test platform are fixed by bolts to make it have no degree of freedom; the connecting hole on the tangential load loading rod is vertically connected to the connecting rod through a round pin, and the vertical load applied by the power source is converted into a tangential load, and distributed to the tangential load loading seat, and finally acts on the test piece installed on the arc tread of the tangential load loading seat.

[0012] The two groups of loading devices of the present invention are arranged in parallel and centrally symmetrically on the experimental platform, and are used for performing material strength tests on two groups of test pieces in parallel.

[0013] The combined loading device for material strength test of the present invention comprises a fixed base, a tangential load loading seat, a fixed shaft pin, a tangential load loading rod, a vertical connecting rod, a vertical load loading beam, etc. The fixed base is installed on the test platform through anchor bolts, and the tangential load loading seat is connected to the fixed base through a fixed shaft pin, which plays the role of fixing the tangential load loading seat and constraining the tangential load loading seat; the tangential load connecting beam is connected to the tangential load loading seat through a fixed shaft pin, and the tangential load connecting beam is fixed by a wedge block so that the tangential load connecting beam can only swing vertically; the vertical loading beam and the tangential load connecting beam are connected by a vertical connecting rod to ensure that the vertical loading force can be transmitted; the vertical load loading beam is connected to the power source through a welded fixed seat, driving the vertical loading beam to move vertically up and down, and forming a tangential force through a connecting rod mechanism.

[0014] The combined loading device for material strength testing of the present invention has the following characteristics:

[0015] 1. Modular design. The test loading device adopts modular design, which reduces the welding fixed connection mode by adjusting the number and type of modules. The modules are assembled according to the size of the test piece and based on the test platform, which improves the assembly accuracy of the loading device, avoids uneven force caused by the tolerance of the test piece, and improves the load transfer efficiency of the loading device.

[0016] 2. Flexible assembly. The test loading device adopts a flexible design and can be flexibly assembled on the test platform according to the size of the test piece. It is suitable for test pieces of various specifications and types and is not restricted by the design size of the test piece.

[0017] 3. Stepless adjustment of assembly dimensions. During the vertical load transmission process, each joint adopts a flexible connection method. Even if there is a slight offset at the flexible connection joint, it will not affect the transmission of the vertical load, ensuring the stability of the test loading device and avoiding lateral offset, which not only reduces the movement resistance but also controls the direction of load transmission.

[0018] 4. Connecting rod mechanism. Reasonably set the size of the four-bar connecting rod mechanism and connect each connecting rod member through a low-pair connection method, so that the connecting rod mechanism can withstand a large load and ensure that under the action of the vertical load, the four-bar connecting rod mechanism moves to form a tangential force at the test piece.

[0019] 5. Flexible test with distributed strength. The strength is distributed through a four-bar linkage and transferred to the test piece. The flexibility enables the device to adapt to test pieces of different sizes, showing a high degree of adaptability and excellent test adaptability, which can provide higher flexibility and operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a loading device of the present invention;

[0021] Figure 2 It is a schematic diagram of the tangential load composition structure of the loading device of the present invention;

[0022] Figure 3 It is a schematic diagram of the vertical loading beam structure of the loading device of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the vertical positioning seat of the present invention;

[0024] Figure 5 It is a schematic diagram of the loading structure of the test piece of the present invention.

[0025] In the figure, 1 is a round pin, 2 is a tangential load loading component, 3 is a vertical load loading component, 4 is a vertical positioning seat, 5 is a connecting rod; 21 is a fixed base, 22 is a fixed shaft pin, 23 is a tangential load loading seat, 24 is a tangential load loading rod, 25 is an upper wedge block, 26 is a lower wedge block, 27 is an anchor bolt hole, 31 is a vertical loading seat, 32 is a transverse connecting beam, 33 is a connecting hole one, 34 is a connecting hole two, 41 is a vertical plate, 42 is a bottom plate, 43 is a positioning hole, 44 is a round hole, 51 is a test piece one, and 52 is a test piece two. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0027] Combined with the attached pictures.

[0028] As shown in the figure, the combined loading device for material strength test of the present invention includes an experimental platform, and the loading device is fixed on the experimental platform. The loading device is composed of a tangential load loading component 2 and a vertical load loading component 3 which can be disassembled and assembled through a connecting rod 5; wherein, there is one vertical load loading component 3 and two tangential load loading components 2, and the two tangential load loading components 2 are respectively connected to the vertical load loading component 3 through the connecting rod 5, and are symmetrically arranged on both sides of the vertical load loading component 3.

[0029] A transverse connecting beam 32 is arranged at both ends of the vertical load loading component 3, and a plurality of spaced connecting holes 34 are arranged on the transverse connecting beam 32; a tangential load loading rod 24 is arranged on the tangential load loading rod 24, and a plurality of equally spaced connecting holes are arranged on the tangential load loading rod 24; the connecting rod 5 is a plate structure connecting member, and equally spaced connecting holes are arranged at both ends, and the connecting rod 5 is vertically and detachably connected to the transverse connecting beam 32 or the tangential load loading rod 24 through the connecting holes.

[0030] The vertical load loading component 3 includes a vertical loading seat 31, a transverse connecting beam 32, a connecting hole 1 33 and a connecting hole 2 34; wherein the vertical loading seat 31 is welded on the transverse connecting beam 32, and is connected to a power source through a bolt hole on the vertical loading seat 31, and the power source drives the vertical load loading component 3 to move vertically; the connecting hole 2 34 set on the transverse connecting beam 32 is vertically connected to the connecting rod 5 through a round pin 1.

[0031] The tangential load loading component 2 includes a fixed base 21, a fixed shaft pin 22, a tangential load loading seat 23, a tangential load loading rod 24, an upper wedge block 25 and a lower wedge block 26; wherein, a baffle is welded on the side of the tangential load loading seat 23, the tangential load loading rod 24 is installed in the baffle, and the tangential load loading rod 24 is fixed by the upper wedge block 25 and the lower wedge block 26, the connecting hole on the tangential load loading rod 24 is vertically connected to the connecting rod 5 through the round pin 1, and receives the load transmitted from the vertical load loading component 3, the fixed base 21 is fixed to the test platform through the anchor bolt hole, and then the tangential load loading seat 23 and the tangential load loading rod 24 are placed on the fixed base 21 through the fixed shaft pin 22.

[0032] The two ends of the transverse connecting beam 32 are connected to the tangential load loading rod 24 of the tangential load loading component 2 of the test platform through the vertical connecting rod 5. The installation of different test pieces is achieved by adjusting the pin hole positions of the tangential load loading rod 24, the transverse connecting beam 32, and the vertical connecting rod 5. The connection between the vertical connecting rod 5 and the transverse connecting beam 32 and the tangential load loading rod 24 is connected by a round pin 1, which can ensure that the vertical load is not affected by the tilt angle of the round pin 1 during the transmission process.

[0033] In order to ensure that the vertical load applied by the power source can be evenly distributed to both ends through the transverse connecting beam 32, the tangential load loading components 2 are symmetrically arranged. The test piece is placed on the arc tread of the tangential load loading seat 23, and the power source is connected through the bolt holes of the vertical loading seat 31 to drive the vertical loading seat 31 to move vertically. Through the connecting rod mechanism, the test load is distributed to the tangential load connecting rod 24, forming a tangential force on the test piece, and transmitting the tangential load to the tangential load loading seat 23.

[0034] The present invention reasonably utilizes the symmetrical design and realizes simultaneous test loading of two test pieces by placing two sets of devices symmetrically along the center of the test piece.

[0035] See also Figure 1 The combined loading device for material strength test of this embodiment includes a tangential load loading component 2, a vertical load loading component 3, a vertical positioning seat 4, a connecting rod 5 and a connecting round pin 1.

[0036] The two ends of the vertical load loading component 3 are connected to the tangential load loading component 2 of the fixed test platform through the vertical connecting rod 5. By adjusting the pin hole positions of the connecting parts of the tangential load loading component 2, the vertical load loading component 3 and the vertical connecting rod 5, the test loads of different test pieces can be achieved.

[0037] The vertical connecting rod 5 is connected with the tangential load loading component 2 and the vertical load loading component 3 by a round pin 1, which can ensure that the vertical load is not affected by the tilt angle of the round pin 1 during the transmission process. In order to ensure that the vertical load applied by the power source can be evenly distributed to both ends through the vertical load loading component 3, the tangential load loading component 2 is symmetrically arranged, and the test piece is placed on the arc tread of the tangential load loading seat 23. The power source is connected and fixed through the bolt holes of the vertical loading seat 31, driving the vertical load loading component 3 to move vertically, and a tangential force is formed on the test piece through the connecting rod mechanism.

[0038] See also Figure 2 In the tangential load loading component 2, the fixed base 21 is fixed on the test platform through the anchor bolt hole 27, a baffle is welded on the side of the tangential load loading seat 23, a tangential load loading rod 24 is installed in the baffle, and the tangential load loading rod 24 is fixed with an upper wedge block 25 and a lower wedge block 26, and then the tangential load loading seat 23 and the tangential load loading rod 24 are placed on the fixed base 21 through the fixed shaft pin 22, and the distance between the tangential load loading seat 23 and the fixed base 21 can be adjusted by moving the fixed base 21 to prevent the tangential load loading seat 23 from moving left and right.

[0039] join Figure 3 In the vertical load loading component 3, the vertical loading seat 31 is welded on the transverse connecting beam 32, and is connected to the power source by bolts to drive the vertical loading seat 31. Each connection is connected by a round pin 1 to form a connecting rod mechanism. The vertical load loading component 3 is connected to the tangential load loading component 2 through a detachable and replaceable connecting piece 3, which reduces welded parts and improves assembly accuracy. At the same time, the slight free amount at the connection of the round pin 1 can solve the problem of specimen installation mismatch caused by manufacturing tolerance.

[0040] like Figure 4 The vertical positioning seat 4 is composed of two vertical plates 41 welded with a bottom plate 42. Its circular hole 44 is connected to the transverse connecting beam 32 of the vertical load loading component 3 through a round pin 1. The positioning hole 43 cooperates with the vertical vertical pole set on the experimental platform, so that the vertical connecting seat 31 can only move up and down in the vertical direction.

[0041] like Figure 5As described above, the tangential load loading component 2 and the vertical load loading component 3 are symmetrically placed along the center of the test piece 1 51 and the test piece 2 52. The brake shoe support of the test piece 1 51 and the test piece 2 52 is placed and fixed on the arc tread of the tangential load loading seat 23. The device requires two power source actuators, which are respectively connected to the vertical loading seats 31 on the two vertical load loading components 3, and the vertical load is applied to the vertical loading seat 31 through the actuator. The vertical load loading component 3 and the connecting rod 5 are connected to the tangential load loading rod 24 of the tangential load loading component 2 through the round pin 1, and the vertical load is transmitted to the tangential load loading rod 24. Due to the connecting rod mechanism composed of the vertical load loading component 3, the connecting rod 5 and the tangential load loading component 2, a tangential force is formed at the tangential load loading rod 24, and finally acts on the test piece 1 51 and the test piece 2 52 through the tangential load loading seat 23.

Claims

1. A combined loading device for material strength testing, comprising an experimental platform, the loading device being fixed on the experimental platform, characterized in that The loading device comprises: a vertical load loading component and two tangential load loading components respectively connected to the vertical load loading component through connecting rods and symmetrically arranged on both sides of the vertical load loading component; The vertical load loading component is provided with transverse connecting beams at both ends, and a plurality of equally spaced connecting holes are provided on the transverse connecting beams; the tangential load loading component is provided with a tangential load loading rod, and a plurality of equally spaced connecting holes are provided on the tangential load loading rod; the connecting rods are all plate structure connecting parts, and equally spaced connecting holes are provided at both ends, and the two ends of the connecting rods are respectively connected to the transverse connecting beams and the tangential load loading rods in a detachable vertical manner through round pins.

2. The combined loading device for material strength test according to claim 1, characterized in that: The vertical load loading component includes a vertical loading seat, a transverse connecting beam, a bolt hole and a connecting hole; wherein the vertical loading seat is welded on the transverse connecting beam, and is connected to a power source through the bolt hole on the vertical loading seat, and the power source is used to drive the vertical load loading component to move vertically; the connecting hole set on the transverse connecting beam is vertically connected to the connecting rod through a round pin.

3. The combined loading device for material strength test according to claim 2, characterized in that: A vertical positioning seat is arranged under the vertical loading seat of the vertical load loading composition, and the vertical positioning seat is composed of two mutually parallel vertical plates and a bottom plate vertically welded; a circular hole is arranged on the vertical plate and is connected and fixed to the transverse connecting beam of the vertical loading beam through a round pin; a positioning hole of a through hole structure is arranged at the center of the bottom plate, which is used for sliding cooperation with a vertically arranged vertical upright pole so that the vertical loading seat can only move up and down in a limited vertical direction.

4. The combined loading device for material strength test according to claim 1, characterized in that: The tangential load loading component includes a fixed base, a fixed shaft pin, a tangential load loading seat, a tangential load loading rod, an upper wedge block and a lower wedge block; wherein, a baffle is welded and fixed on the side of the tangential load loading seat, the tangential load loading rod is installed in the baffle, and the tangential load loading rod is fixed by the upper wedge block and the lower wedge block, the tangential load loading seat is installed on the fixed base by a round pin, the fixed base and the test platform are fixed by bolts, and the connecting hole on the tangential load loading rod is vertically connected to the connecting rod by a round pin.

5. The combined loading device for material strength test according to claim 1, characterized in that: The two groups of loading devices are arranged in parallel and centrally symmetrically on the experimental platform, and are used for parallel material strength tests of two groups of test pieces.

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