Double-shaft and two-way tensile test device for plate parts

Abstract

The utility model relates to a biaxial and biaxial tensile test device for plate parts. The test device comprises a cross-shaped base (14) and a driving part, wherein two groups of stretching assemblies which are perpendicular to each other and have a height difference are mounted on the cross-shaped base (14); each group of stretching assembly comprises a ball screw (5), and a forward nut support (6) and a reverse nut support (10) are arranged on the ball screw; the reverse nut support (10) is fixedly connected with the lower clamping plate mounting support (8); and a lower clamping plate (15) and an upper clamping plate (16) are respectively arranged on the lower clamping plate mounting support (8) and the forward nut support (6). According to the test device, two servo motors are adopted for loading and are matched with a positive nut lead screw, a negative nut lead screw and torque sensors in two directions, precise loading of a servo closed loop is achieved, and precise displacement information and a stress value can be obtained. According to the structural design, a high-low guide rail cross layout is adopted, and interference of a ball screw and a torque sensor in two directions is avoided. Products to be tested are reliably fixed by matching the screws with the clamping plates, so that the test can be carried out smoothly.

Description

TECHNICAL FIELD

[0001] The utility model relates to material test test device field, specifically speaking, it is a kind of plate class parts biaxial bidirectional tensile test device. BACKGROUND

[0002] Bidirectional tensile test is a commonly used material performance test method, and the performance of material can be evaluated by test, and it is improved. The existing tensile test device is basically simple form or single-shaft bidirectional tensile of one end fixed, the other end is stretched, and the performance of material cannot be well reflected, and the mechanical properties of plate, such as tensile strength, elongation at break, elastic modulus etc. cannot be comprehensively evaluated. Moreover, the existing tensile test device cannot complete the test project such as partial tensile, asymmetric tensile, oblique tensile, different speed bidirectional tensile to material. UTILITY MODEL CONTENT

[0003] In view of the defects in the prior art, the utility model aims at providing a kind of plate class parts biaxial bidirectional tensile test device. The device can be biaxial and bidirectional tensile to plate, overcome the shortcomings of previous single-end fixed or single-shaft tensile, and can more fully reflect the mechanical properties of material.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0005] A kind of plate class parts biaxial bidirectional tensile test device, including cross type base 14 and driving part, characterized by, two groups of mutually perpendicular and have height difference tensile assembly are installed on cross type base 14;

[0006] Each tensile assembly includes: by ball screw 5, ball screw is equipped with forward nut support 6 and reverse nut support 10 on ball screw, forward nut support 6 and reverse nut support 10 are respectively moved along ball screw 5 in opposite directions when ball screw 5 is driven to rotate by driving part;Reverse nut mounting support 10 is fixedly connected with lower clamping plate mounting support 8;Lower clamping plate mounting support 8 and forward nut support 6 are respectively equipped with lower clamping plate 15 and upper clamping plate 16, and lower clamping plate 15 and upper clamping plate 16 are used to clamp the plate to be measured.

[0007] On the basis of the above scheme, the forward nut support 6 and the reverse nut support 10 are installed on the sliding guide rail 3 provided on the cross type base 14 by the sliding block.

[0008] On the basis of the above scheme, the lower clamping plate mounting support 8 is installed on the sliding guide rail 3 provided on the cross type base 14 by the sliding block.

[0009] On the basis of the above scheme, the size of the upper clamping plate 16 is smaller than the size of the lower clamping plate 15; the upper clamping plate 16 can be fixed at different positions of the lower clamping plate 15 at will and partially clamps the measured plate with the lower clamping plate 15, and is used for partially stretching test, asymmetric stretching test or oblique stretching test of the measured plate.

[0010] On the basis of the above scheme, the test device further comprises a tension sensor 9, which is used for acquiring the tension value of the measured plate when the measured plate is stretched.

[0011] The plate part double-shaft bidirectional stretching test device has the following beneficial effects:

[0012] The device can overcome the shortcomings of the prior stretching test device that can only be fixed in one direction for stretching and cannot well reflect the material performance, and therefore the stretching test device is designed as a double-shaft (XY shaft) bidirectional stretching structure, which can ensure that the material is fully stretched in two directions, and further comprehensively evaluate the mechanical properties of the plate. The high-low cross-shaped guide rail layout avoids the cross interference of the lead screw and the torque sensor, the special screw rod facilitates the installation and adjustment of the torque sensor, the servo motor and the torque sensor are used for closed loop loading, the screw and the clamping plate fix the measured part, and the accuracy of the loading test and the accuracy of the test data are ensured. The device can also complete the partial stretching, asymmetric stretching, oblique stretching, different speed bidirectional stretching and other test projects of the measured plate. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model has the following drawings:

[0014] Figure 1 It is the whole assembly schematic drawing of the test device.

[0015] Figure 2 It is the measured plate installation schematic drawing of the test device.

[0016] Figure 3 It is the measured plate installation schematic drawing (asymmetric stretching test) of the test device.

[0017] In the drawing, 1, servo motor, 2, elastic coupling, 3, sliding guide rail, 4, front support bearing seat, 5 ball screw, 6, forward nut support, 7, forward nut, 8, lower clamping plate installation support, 9, tension sensor, 10, reverse nut support, 11, custom screw rod, 12, reverse nut, 13, rear support bearing seat, 14, cross-shaped base, 15, lower clamping plate, 16, upper clamping plate, 17, measured plate. PREFERRED EMBODIMENT

[0018] The utility model will be further explained in detail in combination with the drawings.

[0019] As Figure 1 , for example, a single direction stretching assembly, wherein the servo motor 1 is connected with the ball screw 5 through the elastic coupling 2, the ball screw 5 is provided with the forward nut 7 and the reverse nut 12, the forward nut 7 is fixedly connected with the forward nut support 6 through the internal hexagonal screw, and the reverse nut 12 is fixedly connected with the reverse nut support 10 through the internal hexagonal screw. The sliding guide rail 3 is fixed on the cross-shaped base, the sliding guide rail 3 has six sliding blocks in a single direction, and the sliding blocks are fixedly connected with the forward nut support 6, the reverse nut support 10 and the lower clamping plate mounting support 8 respectively. The tensile force sensor 9 has external threads at both ends, is connected with the internal threads of the two customized screw rods 11, has a section of optical axis and external threads, is in clearance fit with the reverse nut support 10 and the lower clamping plate mounting support 8, and the other end is fastened with the nut, so that the tensile force sensor 9 can move in the axial direction and apply the tensile force through the nut. The stretching in the other direction is the same as the above.

[0020] Figure 2 It is the mounting schematic view of the measured plate, four lower clamping plates 15 are fixedly connected with the two forward nut supports 6 and the two lower clamping plate mounting supports 8 through internal hexagonal screws respectively, four upper clamping plates 16 are fixedly connected with the four lower clamping plates 15 through internal hexagonal screws, and the measured plate 17 is clamped.

[0021] The utility model can guarantee that the measured plate is stretched in two directions in two axes (XY axis). Before testing, firstly, the measured plate 17 is clamped and fixed through the lower clamping plate 15 and the upper clamping plate 16, and then two servo motors 1 are started. The two servo motors 1 drive the ball screws 5 to rotate respectively, the forward nut support 6 and the lower clamping plate mounting support 8 arranged on the ball screw move in the opposite directions along the ball screw 5 respectively, and then the measured plate 17 clamped by the lower clamping plate 15 and the upper clamping plate 16 is stretched in two directions or two axes, the tensile force sensor 9 feeds back the tensile force value in real time, and the servo encoder can read the displacement information.

[0022] In addition, the rotating speeds of the two ball screws 5 can also be set to be different, so that the measured plate is tested by being stretched in two directions at different speeds.

[0023] The utility model also can be through the combination setting of different size upper clamping plate 16 and lower clamping plate 15, and carry out the test such as asymmetric stretching, partial stretching, oblique stretching to the measured plate. Figure 3 As shown in the asymmetric two-way stretching example of the plate.

[0024] The utility model also can adopt the mode of the motion two-axis control card plus servo driver, realize servo motor loading, force sensor feedback, two-axis coordinated motion, satisfy displacement control, stress control and strain control, and guarantee the above diversified test requirements.

[0025] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the implementation range of the present application. If the present application is modified or replaced without departing from the spirit and scope of the present application, it should be covered in the protection scope of the claims of the present application.

[0026] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

Claims

1. A biaxial tensile testing device for sheet metal parts, comprising a cross-shaped base (14) and a driving component, characterized in that, Two sets of mutually perpendicular tension components with a height difference are mounted on a cross-shaped base (14); Each set of tensioning components includes: a ball screw (5), on which a forward nut support (6) and a reverse nut support (10) are provided. When the ball screw (5) is driven to rotate by the drive component, the forward nut support (6) and the reverse nut support (10) move in opposite directions along the ball screw (5); the reverse nut support (10) is fixedly connected to the lower clamping plate mounting support (8); the lower clamping plate mounting support (8) and the forward nut support (6) are respectively provided with a lower clamping plate (15) and an upper clamping plate (16), which are used to clamp the plate being tested.

2. The biaxial tensile testing device for sheet metal parts as described in claim 1, characterized in that: The forward nut support (6) and the reverse nut support (10) are mounted on the sliding guide rail (3) provided on the cross-shaped base (14) by a slider.

3. The biaxial tensile testing device for sheet metal parts as described in claim 1, characterized in that: The lower clamp plate mounting bracket (8) is mounted on the sliding guide rail (3) provided on the cross-shaped base (14) by a slider.

4. The biaxial tensile testing device for sheet metal parts as described in claim 1, characterized in that: The upper clamping plate (16) is smaller than the lower clamping plate (15). The upper clamping plate (16) can be fixed at different positions on the lower clamping plate (15) and partially clamp the test plate with the lower clamping plate (15) for partial tensile testing, asymmetric tensile testing or oblique tensile testing of the test plate.

5. The biaxial tensile testing device for sheet metal parts as described in claim 1, characterized in that: The test apparatus also includes a tensile sensor (9), which is used to obtain the tensile force value when the test plate is stretched.

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