CN110207869A - A kind of stress detecting probe fixture - Google Patents

Abstract

The invention provides a stress detection probe fixture, which belongs to the technical field of ultrasonic stress instruments. It solves the problems of complex operation and high production cost of the detection tool when the existing strain gauge measures the material to be tested. The surgical curtain used for ultrasonic detection includes a mounting base, a fixed base and a sliding bracket. The mounting base is fixedly connected with the fixed base, and the mounting base is slidingly connected with the sliding bracket. There is a probe and a tension spring, and the two ends of the tension spring are respectively connected with the sliding bracket and the mounting seat. When the tension spring is in a free state, the bottom surface of the probe exceeds the bottom surface of the fixed base. The fixed base is used to fix the stress detection probe fixture on the material surface. The invention has the advantages of convenient use, simple structure, low processing and assembly difficulty, low production cost and high detection precision.

Description

A stress detection probe fixture

technical field

The invention belongs to the technical field of ultrasonic stress instruments, in particular to a stress detection probe fixture.

Background technique

When a material cannot be displaced under the action of an external force, its geometry and size will change. This deformation is called strain. When the material is deformed, a reaction force of equal size but opposite direction is generated inside to resist the external force. This reaction force per unit area is defined as stress, or when the object is deformed due to external factors, the internal force that interacts between the various parts of the object , to resist the effect of this external cause, and try to make the object return from the deformed position to the pre-deformed position.

The stress measurement method based on ultrasonic acoustoelasticity theory utilizes the principle of acoustic birefringence in stressed materials. There is an inherent relationship between ultrasonic velocity and stress in the measured object, and this relationship has good linearity at the same temperature. The current stress detection methods include: blind hole method, X-ray method, magnetic method and ultrasonic method. Among them, the blind hole method needs to be drilled and pasted with strain gauges before measurement. The pasting needs to meet certain process requirements, which will cause damage to the components and the operation is cumbersome. The X-ray method is non-destructive, accurate and reliable, but it can only measure micron-level thickness. Operation needs to pay attention to ionizing radiation, high cost, low measurement efficiency, magnetic measurement method is simple to operate, fast measurement, low accuracy, ultrasonic method measurement efficiency is high and non-destructive, easy and safe to operate, with the development of modern hardware chips, accuracy and resolution The efficiency has been greatly improved. However, the existing strain gauges are complex in operation and high in production cost, and cannot be applied to various shapes of material surfaces, so the measurement effect is not good.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems in the prior art, and provide a stress detection probe fixture that is easy to use and can be applied to material surfaces of various shapes.

The purpose of the present invention can be achieved through the following technical solutions: a stress detection probe clamp, characterized in that it includes a mounting base, a fixed base and a sliding bracket, the mounting base is fixedly connected to the fixed base, and the mounting base is connected to the The sliding bracket is slidably connected, and the mounting base can reciprocate along the length direction of the sliding bracket. The sliding bracket is provided with a probe and a tension spring, and the two ends of the tension spring are respectively connected with the sliding bracket and the mounting base. When the tension spring is in a free state, the bottom surface of the probe exceeds the bottom surface of the fixed base, and the fixed base is used to fix the stress detection probe fixture on the surface of the material to be tested.

The working principle of the present invention: when performing stress detection, the device is fixed on the surface of the object to be measured, and the device and the surface of the object to be measured are completely fixed through the fixed base. Since the probe protrudes relative to the fixed base, the probe is pushed by the surface of the object and moves along Push in the length direction, due to the tension, the tension spring changes from the natural state to the tension state under the tension, the probe abuts on the surface of the measured object and fully contacts with the measured object, the probe works to measure data, and the tension spring can be fixed after use The base returns to its original position. The arrangement of the above structure can effectively detect and analyze the stress of the material, and is convenient to use, simple in structure and low in production cost.

In the above stress detection probe fixture, a fixed base is installed at both ends of the mounting seat.

In the above stress detection probe fixture, the top of the sliding bracket is further provided with a spring pull plate, and two ends of the spring pull plate are fixedly connected with a tension spring respectively.

In the above stress detection probe fixture, the fixed base is a magnetic base, and a button switch is provided on the magnetic base, and the magnetic opening and closing of the magnetic base can be controlled by toggling the button switch.

In the above-mentioned stress detection probe fixture, the sliding bracket is a linear guide rail, including a slider and a straight rail, the slider and the mounting seat are fixed by a connecting piece, and the bottom of the linear guide rail is also provided with a probe The mounting seat, the probe mounting seat is used to install the probe, and the straight rail is respectively fixed to the probe mounting seat and the spring pull plate through connecting pieces.

In the above-mentioned stress detection probe fixture, the mounting base is also provided with a cable clamp, and the cable clamp is clamped with a wiring groove, and the wiring groove is used for the wire harness of the probe. Routing and fixing.

In the above stress detection probe fixture, the magnetic base is provided with a groove and two inclined surfaces, and the groove is located in the middle of the inclined surfaces.

In the above stress detection probe fixture, the probe and the groove are on the same straight line.

In the above-mentioned stress detection probe fixture, the two ends of the mounting seat are further provided with limiting grooves, and the limiting grooves are used for positioning and fixing the base.

In the above stress detection probe fixture, the probe mounting seat is provided with a mounting groove, the mounting groove is used for positioning and mounting the probe, and the probe is fixedly connected to the probe mounting seat through a connecting piece.

The advantages of the present invention are: the present invention can effectively detect and analyze the stress of the material to be tested, is convenient to use, has a simple structure, uses a large number of connectors for fastening, has low processing and assembly difficulty, low production cost, and high detection accuracy.

Description of drawings

Fig. 1 is the isometric side schematic diagram of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the right view of the present invention;

In the figure, 1. mounting seat; 2. fixed base; 3. sliding bracket; 4. probe mounting seat; 5. probe; 6. spring pull plate; 7. extension spring; 8. button switch; 9. slider; 10 , Straight rail; 11, cable clamp; 12, wiring groove; 13, groove; 14, inclined surface; 15, limit groove; 16, installation groove.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figure 1-3, the stress detection probe fixture includes a mounting base 1, a fixed base 2 and a sliding bracket 3, the mounting base 1 is fixedly connected to the fixed base 2, the mounting base 1 is slidably connected to the sliding bracket 3, and the mounting base 1 can be Do reciprocating motion along the length direction of the sliding bracket 3. The sliding bracket 3 is provided with a probe 5 and a tension spring 7. The two ends of the tension spring 7 are respectively connected with the sliding bracket 3 and the mounting seat 1. When the tension spring 7 is in a free state, the probe The bottom surface of 5 exceeds the bottom surface of the fixed base 2, and the fixed base 2 is used to fix the stress detection probe fixture on the surface of the material to be tested.

In further detail, in order to make the device more stable and balanced, with better fixing effect and higher detection accuracy, a fixing base 2 is installed at both ends of the mounting base 1 .

In further detail, in order to make the device more stable and balanced, and the detection accuracy is higher, the top of the sliding bracket 3 is also provided with a spring pull plate 6, the spring pull plate 6 is T-shaped, and a tension spring 7 is fixedly connected to both ends.

In further detail, in order to facilitate the measurement of the magnetically permeable material, the fixed base 2 is a magnetic base, and a button switch 8 is provided on the magnetic base, and the magnetic opening and closing of the magnetic base can be controlled by toggling the button switch 8 . The inside of the magnetic base is a cylinder, and a bar-shaped permanent magnet or permanent magnet is placed in the middle. The outer base is a piece of soft magnetic material, and the magnet inside is rotated by turning the handle. When the two poles of the magnet are in the up and down direction, that is, when the N or S pole of the magnet is facing the base of the soft magnetic material, it is magnetized. This direction has a strong magnetism, so it can be used to attract the steel surface. When the two poles of the magnet are in the horizontal direction, the middle of the NS will not be magnetized when facing the base of the soft magnetic material, so there is almost no magnetic force on the base at this time, and it can be easily removed from the surface of the magnetic permeable material.

In further detail, the sliding bracket 3 is a linear guide rail, including a slider 9 and a straight rail 10, the slider 9 and the mounting seat 1 are fixed by connecting pieces, and the bottom of the linear guide rail is also provided with a probe mounting seat 4, which is used for mounting The probe 5 and the straight rail 10 are respectively fixed to the probe mounting base 4 and the spring pull plate 6 through connecting pieces. With the arrangement of the above structure, the advantages of high precision of the linear guide rail are utilized, the installation is simple, and the cost of parts is low.

In further detail, in order to facilitate wiring and prevent the wires from affecting the overall perception, the mounting base 1 is also provided with a cable clamp 11, and the cable clamp 11 is clamped with a wiring groove 12, and the wiring groove 12 is used for the connection of the probe 5. Harness routing and securing.

In further detail, the magnetic base is provided with a groove 13 and two inclined surfaces 14 , and the groove 13 is located in the middle of the inclined surfaces 14 . With the arrangement of the above structure, it is possible to implement stress analysis on magnetically permeable materials with surfaces of various shapes.

In further detail, in order to ensure accuracy, the probe 5 and the groove 13 are on the same straight line.

In further detail, a limiting groove 15 is provided at both ends of the mounting base 1 , and the limiting groove 15 is used for positioning and fixing the base 2 . With the arrangement of the above structure, the installation of the fixed base 2 is more convenient, and at the same time, the fixing is more firm.

In further detail, in order to fix and install the probe 5 more conveniently, the probe mounting base 4 is provided with a mounting groove 16, the mounting groove 16 is used for positioning and installing the probe 5, and the probe 5 is fixedly connected to the probe mounting base 4 through a connector.

When performing stress detection, place the device horizontally on the surface of the measured object, and press the device and the surface of the measured object through the fixed base 2. Since the probe 5 protrudes relative to the fixed base 2, the probe 5 is fully connected to the measured object. Contact, due to the action of tension, the tension spring 7 is subjected to tension from a natural state to a tension state. At this time, the probe 5 is subjected to the elastic force to maintain a state close to the object to be measured. The probe 5 works to measure data. After use, the tension spring 7 The fixed base 2 can be returned to the original position.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although this article uses a lot of mounting base 1, fixed base 2, sliding bracket 3, probe mounting base 4, probe 5, spring pull plate 6, tension spring 7, button switch 8, slider 9, straight rail 10, cable Clamp 11, wiring groove 12, groove 13, inclined surface 14, limiting groove 15, installation groove 16 and other terms, but the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (10)

1. a kind of stress detecting probe fixture, which is characterized in that including mounting base (1), firm banking (2) and sliding support (3), the mounting base (1) and firm banking (2) are connected, and the mounting base (1) is slidably connected with sliding support (3), institute The mounting base (1) stated can move reciprocatingly along sliding support (3) length direction, and the sliding support (3) is equipped with probe (5) With tension spring (7), the both ends of the tension spring (7) are connect with sliding support (3) and mounting base (1) respectively, when the tension spring (7) In a free state, the bottom surface of the probe (5) exceeds the bottom surface of firm banking (2), and the firm banking (2) is used for This stress gauge probe gripper is fixed on to the surface of measured material.

2. a kind of stress detecting probe fixture according to claim 1, which is characterized in that described mounting base (1) both ends It is respectively mounted a firm banking (2).

3. a kind of stress detecting probe fixture according to claim 1, which is characterized in that sliding support (3) top End is additionally provided with spring pulling plate (6), and a tension spring (7) is respectively fixedly connected in described spring pulling plate (6) both ends.

4. a kind of stress detecting probe fixture according to claim 1, which is characterized in that the firm banking (2) is Magnetic bases, the magnetic bases are equipped with button switch (8), can control magnetic bases by stirring button switch (8) Magnetic opening and closing.

5. a kind of stress detecting probe fixture according to claim 3, which is characterized in that the sliding support (3) is Linear guide, including sliding block (9) and straight rail (10), the sliding block (9) is fixed with mounting base (1) by connector, described Linear guide bottom is additionally provided with probe mounting base (4), and the probe mounting base (4) is for installing probe (5), the straight rail (10) it is fixed respectively at probe mounting base (4) and spring pulling plate (6) by connector.

6. a kind of stress detecting probe fixture according to claim 1, which is characterized in that the mounting base (1) is also set Have wire cable clamp (11), be arranged on the wire cable clamp (11) cabling channel (12), the cabling channel (12) is for popping one's head in (5) harness cabling and fixation.

7. a kind of stress detecting probe fixture according to claim 1, which is characterized in that the magnetic bases are equipped with recessed Slot (13) and two inclined surface (14), it is intermediate that the groove (13) is located at inclined surface (14).

8. a kind of stress detecting probe fixture according to claim 7, which is characterized in that the probe (5) and groove (13) on same straight line.

9. a kind of stress detecting probe fixture according to claim 1, which is characterized in that described mounting base (1) both ends It is also provided with limiting slot (15), the limiting slot (15) is for positioning firm banking (2).

10. a kind of stress detecting probe fixture according to claim 1, which is characterized in that the probe mounting base (4) On offer mounting groove (16), for the mounting groove (16) for location and installation probe (5), the probe (5) passes through connection Part and probe mounting base (4) are connected.