CN218884877U

CN218884877U - Contact flatness detection device

Info

Publication number: CN218884877U
Application number: CN202223494263.1U
Authority: CN
Inventors: 叶旭杰; 周铁松; 徐驰; 周兵杰
Original assignee: Ningbo Gaoyue Intelligent Technology Co ltd
Current assignee: Ningbo Gaoyue Intelligent Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-04-18
Anticipated expiration: 2032-12-27

Abstract

The utility model provides a contact type flatness detection device, which comprises a fixed frame and a contact type displacement sensor arranged on the fixed frame, wherein the fixed frame comprises a first plate body which is used for being attached to the machining surface of a casting, a first guide hole which runs through the top and the bottom of the first plate body is arranged on the first plate body, and a slide block is arranged in the first guide hole in a sliding way; one end of the sliding block is abutted against a measuring head of the contact type displacement sensor, and the other end of the sliding block is used for abutting against and extruding a head protrusion of a rivet nut arranged in a rivet hole of the casting; in an initial state, the end face of the other end of the sliding block extends outwards from the bottom hole of the first guide hole or is flush with the bottom face of the first plate body. The detection device is simple in structure and convenient to operate, and can improve the measurement precision and the working efficiency.

Description

Contact flatness detection device

Technical Field

The utility model relates to a measuring tool technical field particularly, relates to a contact flatness detection device.

Background

After the casting is formed, rivets are needed to be riveted on the casting to fixedly connect accessories, and tapping screws or rivet nuts are usually adopted. When the tapping screw is adopted for connection, the tapping screw is easy to loosen in the long-term vibration process of the outside; the rivet nut is an important means for nut connection between a casting and a fitting due to the advantages of low cost, high connection efficiency, simple connection method and the like. Before the cast nut is connected with the fitting, the rivet nut is usually required to be installed on the cast in advance, and the specific method is as follows: firstly, set up the rivet hole on the machine of foundry goods adds the face, then add face one side from the machine and insert the rivet nut in the rivet hole, in order to prevent that the rivet nut from dropping from the rivet hole, be provided with the step face that the head that supplies the rivet nut placed (the head external diameter of rivet nut is greater than the body external diameter of rivet nut) in the rivet hole usually, make the rivet nut take place to warp and fasten in the rivet hole with the riveter at last, at this in-process, the head of rivet nut very easily produces distortion and produces the distortion and simultaneously and produce the height many places protruding not of uniform, this arch is the arch of extending towards the orifice department of rivet hole by the step of rivet hole, and arbitrary one is protruding and is higher than the machine of foundry goods and adds the face in the rivet hole, can all influence follow-up operation of installing the accessory on the foundry goods, promptly: because the installation face of accessory and the machine of foundry goods add the face and can not laminate completely, easily cause product quality problems such as two-sided laminating insecure. Therefore, after the rivet nut is installed in the rivet hole of the casting, multiple bulges at the head of the rivet nut need to be detected, and it is ensured that no bulge protrudes out of the rivet hole and is higher than the machined surface of the casting, that is, the surface flatness of the machined surface of the casting is not damaged. The prior art mainly adopts the slide caliper rule to measure, when using the slide caliper rule to measure, needs to measure the data in order to obtain protruding peak to the many places arch of same rivet nut head one by one, and the slide caliper rule measurement not only measuring degree of accuracy is not high, and work efficiency is low moreover, wastes time and energy.

The contact type displacement sensor is high-precision measuring equipment, physical quantity measurement is carried out by contacting a measuring head with a measured object, the contact type displacement sensor on the market at present generally refers to an inductive type displacement sensor also called LVDT displacement sensor, and the electromagnetic induction principle is utilized to measure various physical quantity numerical values such as size, flatness, camber, parallelism and the like of a product. Because the spring is arranged between the body of the contact type displacement sensor and the measuring head, when the measuring head and the surface of the measured object are mutually extruded, the measuring head moves to one side of the body of the contact type displacement sensor after being extruded and compresses the spring, and pressure data and displacement data generated by the pressure application of the measuring head in the process can be recorded by the contact type displacement sensor. However, since the end of the probe in contact with the object to be measured is pointed, it is determined that the contact displacement sensor is only suitable for single-point measurement and is not suitable for measurement of a surface formed by multiple points, and if data of the highest point of a protrusion is to be measured from multiple protrusions at the head of the rivet nut, the multiple protrusions need to be measured one by using the contact displacement sensor, and it is finally determined which protrusion is the highest point of the protrusion after data comparison, so that the existing contact displacement sensor cannot meet the following requirements: the highest point of the head of the rivet nut can be determined through one-time measurement, so that the purpose of improving the measurement efficiency is achieved.

Therefore, a detection device with high measurement accuracy and high measurement efficiency is designed, and the detection device can determine the highest point of the head protrusion of the blind rivet nut through one-time detection, and further can judge whether the head protrusion of the blind rivet nut protrudes from the rivet hole of the casting.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: the detection device has the advantages that the defects in the prior art are overcome, the highest point of the head of the rivet nut can be determined through one-time detection, and the contact type flatness detection device can accurately judge whether the head of the rivet nut protrudes from a rivet hole of a casting or not.

In order to solve the problems, the utility model provides a contact type flatness detecting device, which comprises a fixing frame and a contact type displacement sensor arranged on the fixing frame, wherein the fixing frame comprises a first plate body used for being attached to the machining surface of a casting, the first plate body is provided with a first guide hole which penetrates through the top and the bottom of the first plate body, and a slide block is slidably arranged in the first guide hole; one end of the sliding block is abutted against a measuring head of the contact type displacement sensor, and the other end of the sliding block is used for abutting against and extruding a head protrusion of a rivet nut arranged in a rivet hole of the casting; in an initial state, the end face of the other end of the sliding block extends outwards from the bottom hole of the first guide hole or is flush with the bottom face of the first plate body.

When the pull rivet nut is used, the fixing frame is placed on a casting, the plate surface of the first plate body is in contact with the machining surface of the casting, the hole opening of the first guide hole corresponds to the hole opening of the rivet hole in the casting, the end surface of the other end of the sliding block is abutted to the head protrusion of the pull rivet nut, and the end surface of the other end of the sliding block has a plane characteristic, so that only the highest point of the head protrusion of the pull rivet nut is abutted to the end surface of the other end of the sliding block; the fixing frame is pressed downwards, so that the plate surface of the first plate body is completely attached to the machined surface of the casting, the other end of the sliding block is pressed to drive the sliding block to slide towards one side of a measuring head of the contact type displacement sensor, and after the sliding block slides, if the end surface of the other end of the sliding block slides into and is hidden in the first guide hole, the sliding block does not extend outwards from a bottom orifice of the first guide hole and is not flush with the bottom surface of the first plate body, so that the highest point of the head protrusion of the rivet nut protrudes out of the rivet hole and is higher than the machined surface of the casting, namely, the surface flatness of the machined surface of the casting is damaged, and the quality problem exists; and otherwise, the blind rivet nut is installed in the rivet hole of the casting in a qualified way.

Compared with the prior art, the utility model, useful part lies in: the utility model can improve the accuracy of measurement by using the contact displacement sensor to replace the traditional caliper measurement, and meanwhile, the utility model also has the good characteristics of simple structure and convenient operation; the utility model discloses when using, through the terminal surface of the slider other end and the protruding looks butt of the head of rivet nut, replace tip form on current contact displacement sensor's the gauge head tip and the protruding looks butt of the head of rivet nut, can realize can confirm through once detecting that the protruding peak of rivet nut head is riveted, and then can judge and rivet the protruding rivet hole of nut head and whether emit from the foundry goods that has improved detection efficiency greatly when labour saving and time saving.

As the improvement, be provided with the portal on the first plate body, contact displacement sensor's body sets firmly on the portal and contact displacement sensor's gauge head is located and encloses the square region who establishes the formation jointly by portal and first plate body. In this structure, the setting of portal is convenient for set up contact displacement sensor on the mount, and encloses the square region who establishes the formation jointly by portal and first plate body and can provide the space for contact displacement sensor's gauge head concertina movement.

As the improvement, the body of slider is the cylinder and sets firmly on the body of slider annular connecting portion, and annular connecting portion are located the portal and the diameter size of annular connecting portion is greater than the aperture size of first guide hole top drill way. In this structure, the annular connecting portion is provided to prevent the slider from falling out of the first guide hole.

As the improvement, one pot head of slider is equipped with first pressure spring, and first pressure spring cover is established in the outside of contact displacement sensor's gauge head, and the both ends of first pressure spring respectively with portal and annular connecting portion butt. In the structure, the arrangement of the first pressure spring can apply the action force on the sliding block to drive the sliding block to slide to one side of a measuring head far away from the contact type displacement sensor, so that the end face of the other end of the sliding block is ensured to extend out of the bottom hole of the first guide hole in the initial state.

As an improvement, the fixed frame comprises a second plate body and a plurality of guide pillars, the second plate body is arranged in parallel to the first plate body, and second guide holes corresponding to the guide pillars are formed in the second plate body; one end of the guide pillar is fixedly arranged on the first plate body, the other end of the guide pillar is slidably inserted into the second guide hole, and the diameter of the end part of the other end of the guide pillar is larger than the diameter of the hole of the second guide hole; the body of guide pillar is overlapped and is equipped with the second pressure spring, and the both ends of second pressure spring respectively with first plate body and second plate body butt. After the structure is applied, when the fixing frame is pressed down, a buffer force can be formed between the first plate body of the fixing frame and the casting, the buffer force can play a role in protecting the contact type displacement sensor, the contact type displacement sensor is prevented from being crushed due to overlarge force, and meanwhile, due to the existence of the buffer force, the plate body of the first plate body and the machining surface of the casting can be pressed more compactly.

As the improvement, be provided with the mounting hole on the second plate body, the mounting hole is worn to locate by the free end of contact displacement sensor's body. In this structure, the setting of mounting hole is convenient for install contact displacement sensor in the mount, also provides bigger space for placing of contact displacement sensor's body simultaneously.

As an improvement, the fixing frame is slidably arranged on the base plate, and the base plate is provided with a cylinder for driving the fixing frame to slide. After the structure is applied, the air cylinder is utilized to drive the fixing frame to slide, so that the manual pressing of the fixing frame can be replaced, the labor can be saved, and the acting force applied to the fixing frame can be more accurate and controllable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a first perspective view of the present invention;

fig. 3 is a second perspective view of the present invention.

Description of reference numerals:

1. a fixed mount; 11. a first plate body; 111. a first guide hole; 12. a second plate body; 121. a second guide hole; 122. mounting holes; 13. a guide post; 2. a contact displacement sensor; 3. a slider; 31. an annular connecting portion; 4. a gantry; 5. a first pressure spring; 6. a second pressure spring; 7. a substrate; 8. and a cylinder.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1 and 2, in the present invention, the contact type flatness detecting apparatus includes a fixing frame 1 and a contact type displacement sensor 2 disposed on the fixing frame 1, the fixing frame 1 includes a first plate 11 for being attached to a machining surface of a casting, a first guide hole 111 penetrating through a top and a bottom of the first plate 11 is disposed on the first plate 11, and a slider 3 is slidably disposed in the first guide hole 111; one end of the sliding block 3 is abutted with a measuring head of the contact type displacement sensor 2, and the other end of the sliding block 3 is abutted with and extrudes a head bulge of a rivet nut arranged in a rivet hole of a casting; in the initial state, the end face of the other end of the slider 3 protrudes outward from the bottom opening of the first guide hole 111 or is flush with the bottom face of the first plate body 11.

When the device is used, the fixing frame 1 is placed on a casting, the plate surface of the first plate body 11 is in contact with the machining surface of the casting, the hole opening of the first guide hole 111 corresponds to the hole opening of the rivet hole in the casting, the end surface of the other end of the sliding block 3 is in protruding abutting joint with the head of the rivet nut, and the end surface of the other end of the sliding block 3 has a plane characteristic, so that only the highest point of the head of the rivet nut is abutted against the end surface of the other end of the sliding block 3; the fixing frame 1 is pressed downwards, so that the plate surface of the first plate body 11 is completely attached to the machined surface of the casting, the other end of the sliding block 3 is pressed to drive the sliding block 3 to slide towards one side of a measuring head of the contact type displacement sensor 2, and after the sliding block 3 slides, if the end surface of the other end of the sliding block 3 slides into and is hidden in the first guide hole 111, the sliding block does not extend outwards from a bottom hole of the first guide hole 111 and is not flush with the bottom surface of the first plate body 11, it is indicated that the highest point of the head protrusion of the rivet nut protrudes out of the rivet hole and is higher than the machined surface of the casting, namely the surface flatness of the machined surface of the casting is damaged, and the quality problem exists; and otherwise, the blind rivet nut is installed in the rivet hole of the casting in a qualified mode.

Compared with the prior art, the utility model, useful part lies in: the utility model can improve the accuracy of measurement by using the contact type displacement sensor 2 to replace the traditional caliper measurement, and meanwhile, the utility model also has the good characteristics of simple structure and convenient operation; the utility model discloses when using, through the terminal surface of the 3 other ends of slider and the protruding looks butt of the head of rivet nut, replace tip form on current contact displacement sensor 2's the gauge head tip and the protruding looks butt of the head of rivet nut, can realize can confirm through once detecting that the protruding peak of rivet nut head is riveted to the rivet nut head, and then can judge whether the rivet nut head arch emits from the rivet hole of foundry goods, improved detection efficiency greatly in the time of labour saving and time saving.

As shown in fig. 2, a gantry 4 is disposed on the first plate 11, the body of the contact type displacement sensor 2 is fixedly disposed on the gantry 4, and the measuring head of the contact type displacement sensor 2 is located in a square area formed by the gantry 4 and the first plate 11. In this structure, the setting of portal 4 is convenient for set up contact displacement sensor 2 on mount 1, and encloses the square region who establishes the formation jointly by portal 4 and first plate body 11 and can provide the space for contact displacement sensor 2's gauge head concertina movement.

As shown in fig. 1 to 3, the body of the slider 3 is a cylinder, and an annular connection portion 31 is fixedly disposed on the body of the slider 3, the annular connection portion 31 is located in the gantry 4, and the diameter of the annular connection portion 31 is larger than the diameter of the top opening of the first guide hole 111. In this structure, the annular connecting portion 31 is provided to prevent the slider 3 from falling out of the first guide hole 111.

As shown in fig. 1 to fig. 3, one end of the slider 3 is sleeved with a first compression spring 5, the first compression spring 5 is sleeved outside the measuring head of the contact type displacement sensor 2, and two ends of the first compression spring 5 are respectively abutted to the gantry 4 and the annular connecting portion 31. In this structure, the first pressure spring 5 is arranged to apply an acting force to the slider 3 to drive the slider 3 to slide to a side away from the measuring head of the contact type displacement sensor 2, so as to ensure that the end surface of the other end of the slider 3 extends out from the bottom opening of the first guide hole 111 in the initial state.

As shown in fig. 1 and 3, the fixed frame 1 includes a second plate 12 and a plurality of guide posts 13, the second plate 12 is disposed parallel to the first plate 11, and the second plate 12 is provided with second guide holes 121 disposed corresponding to the guide posts 13; one end of the guide post 13 is fixedly arranged on the first plate body 11, the other end of the guide post 13 is slidably inserted into the second guide hole 121, and the diameter of the end part of the other end of the guide post 13 is larger than the diameter of the hole of the second guide hole 121; the body of the guide post 13 is sleeved with a second pressure spring 6, and two ends of the second pressure spring 6 are respectively abutted to the first plate body 11 and the second plate body 12. After the structure is applied, when the fixing frame 1 is pressed down, a buffer force can be formed between the first plate body 11 of the fixing frame 1 and the casting, the buffer force can play a role in protecting the contact type displacement sensor 2, the contact type displacement sensor 2 is prevented from being crushed due to overlarge force, and meanwhile, due to the existence of the buffer force, the plate body of the first plate body 11 and the machining surface of the casting can be pressed more compactly.

As shown in fig. 1 and 3, the second plate 12 is provided with a mounting hole 122, and the free end of the contact type displacement sensor 2 is inserted into the mounting hole 122. In this structure, the installation hole 122 is convenient for install the contact displacement sensor 2 in the fixing frame 1, and provides a larger space for placing the body of the contact displacement sensor 2.

As shown in fig. 1, 2 or 3, the fixing frame 1 is slidably mounted on a base plate 7, and a cylinder 8 for driving the fixing frame 1 to slide is disposed on the base plate 7. Specifically, a slide rail is arranged on the substrate 7, the fixed frame 1 is arranged on the slide rail, and a slide groove in sliding fit with the slide rail is arranged on the fixed frame 1; the body of cylinder 8 sets firmly on base plate 7, and the output and the mount 1 fixed connection of cylinder 8. After the structure is applied, the air cylinder 8 is utilized to drive the fixing frame 1 to slide, so that the manual pressing of the fixing frame 1 can be replaced, the labor can be saved, and the acting force applied to the fixing frame 1 can be more accurate and controllable.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. The utility model provides a contact flatness detection device, includes mount (1) and sets up contact displacement sensor (2) on mount (1), mount (1) is including being used for adding first plate body (11) that the face laminated mutually with the machine of foundry goods, its characterized in that: the first plate body (11) is provided with a first guide hole (111) penetrating through the top and the bottom of the first plate body (11), and a sliding block (3) is slidably arranged in the first guide hole (111); one end of the sliding block (3) is abutted against a measuring head of the contact type displacement sensor (2), and the other end of the sliding block (3) is abutted against and extrudes a head protrusion of a rivet nut installed in a rivet hole of the casting; in the initial state, the end face of the other end of the sliding block (3) extends outwards from the bottom hole of the first guide hole (111) or is flush with the bottom face of the first plate body (11).

2. The contact flatness detecting apparatus of claim 1, wherein: the measuring device is characterized in that a door frame (4) is arranged on the first plate body (11), the body of the contact type displacement sensor (2) is fixedly arranged on the door frame (4), and the measuring head of the contact type displacement sensor (2) is located in a square area formed by the door frame (4) and the first plate body (11) in a surrounding mode.

3. The contact flatness detecting apparatus according to claim 2, wherein: the body of the sliding block (3) is a cylinder, an annular connecting part (31) is fixedly arranged on the body of the sliding block (3), the annular connecting part (31) is positioned in the door frame (4), and the diameter of the annular connecting part (31) is larger than the aperture of the top orifice of the first guide hole (111).

4. The contact flatness detecting apparatus according to claim 3, wherein: one end cover of slider (3) is equipped with first pressure spring (5), first pressure spring (5) cover is established the outside of the gauge head of contact displacement sensor (2), just the both ends of first pressure spring (5) respectively with portal (4) and annular connecting portion (31) butt.

5. The contact flatness detecting apparatus according to claim 4, wherein: the fixed frame (1) comprises a second plate body (12) and a plurality of guide posts (13), wherein the second plate body (12) is arranged in parallel to the first plate body (11), and second guide holes (121) which are arranged corresponding to the guide posts (13) are formed in the second plate body (12); one end of the guide post (13) is fixedly arranged on the first plate body (11), the other end of the guide post (13) is slidably inserted into the second guide hole (121), and the diameter of the end part of the other end of the guide post (13) is larger than the diameter of the hole of the second guide hole (121); the body of the guide post (13) is sleeved with a second pressure spring (6), and two ends of the second pressure spring (6) are respectively abutted to the first plate body (11) and the second plate body (12).

6. The contact flatness detecting apparatus of claim 5, wherein: the second plate body (12) is provided with a mounting hole (122), and the free end of the body of the contact type displacement sensor (2) penetrates through the mounting hole (122).

7. The contact flatness detecting apparatus of claim 5, wherein: the fixing frame (1) is slidably arranged on the base plate (7), and the base plate (7) is provided with a cylinder (8) used for driving the fixing frame (1) to slide.