Method and device for accurately measuring height of spring in strip spring

Abstract

The invention discloses a method and device for accurately measuring the height of a spring in a strip spring, and belongs to the technical field of strip spring welding detection equipment.The method comprises the following steps that firstly, a clamp clamping workpieces is conveyed to a detection station through a conveying module, the workpieces comprise strips and springs, and the springs are hung at intervals in the length direction of the strips; creating a coordinate system of the workpiece; finally, the spring is pressed in the x-axis direction through the contact probe, when the pressure reaches a certain value, the contact probe is triggered, and the absolute value of the x-axis coordinate at the moment is the height value of the vertex of the spring relative to the strip. According to the method, the workpiece coordinate system is established for the clamp, and the installation error of the clamp is compensated, so that the relative height of the spring and the strip can be accurately measured. The device is high in automation degree, the welding quality of the strip spring is judged from multiple dimensions, and the detection reliability is well guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of strip spring welding detection technology, and in particular to a method and device for accurately measuring the spring height in a strip spring. Background Art

[0002] The grid is a critical component of nuclear fuel assemblies, holding and positioning the fuel rods and maintaining the center-to-center distance between them. The grid is typically assembled from multiple spring strips. The production of spring strips requires multiple processing and inspection steps, with the inspection step being a crucial one, ensuring product quality. Traditional weld quality inspection relies primarily on manual visual inspection or single-sensor fixed-point inspection. Manual visual inspection suffers from low efficiency, high missed detection rates, and poor consistency, making it difficult to meet high-precision, high-speed requirements, especially in mass production. Furthermore, workpieces can skew when assembled on fixtures, and different fixtures can cause different directions or amounts of skew, leading to large errors and low accuracy in vertex detection using a single sensor. Furthermore, existing inspection equipment often lacks integrated defective product handling capabilities, requiring manual sorting of defective workpieces after inspection, further reducing production efficiency. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a method for accurately measuring the spring height in a strip spring, which is convenient to detect, has high detection efficiency, and accurate detection results, and can better improve the above-mentioned problems.

[0004] Another object of an embodiment of the present invention is to provide a device for accurately measuring the spring height in a strip spring, which has a simple structure, is easy to use, and can better improve the above-mentioned problems.

[0005] The embodiment of the present invention is achieved as follows: An embodiment of the present invention provides a method for accurately measuring the spring height in a strip spring, comprising the following steps: S1: The fixture holding the workpiece is transported to the inspection station through the conveying module. The workpiece includes a strip and a spring, and the springs are suspended at intervals along the length of the strip; S2: Create a workpiece coordinate system (x0, y0, z0); the x-axis direction of the workpiece coordinate system is the width direction of the workpiece, the y-axis direction is the length direction of the workpiece, and the z-axis direction is the height direction of the workpiece; S3: Use the contact probe to press the spring in the x-axis direction. When the pressure reaches a certain value, the contact probe is triggered. The absolute value of the x-axis coordinate at this time is the height of the spring's vertex relative to the strip.

[0006] Furthermore, in step S2, a contact probe is used to first collect the coordinates of three different points on the large side surface of one side of the workpiece strip, and then collect the coordinates of two points on the upper end surface of the strip, and then collect the coordinates of a point on the end surface of one end in the length direction of the strip, thereby creating a coordinate system for the workpiece. The three points on the large side surface are two points near the upper position at both ends and a point near the lower position in the middle, the two points on the upper end surface are respectively close to the two end positions in the length direction, and the point in the length direction is on the left end surface of the strip.

[0007] Furthermore, in step S2, if there are multiple sets of fixtures, a workpiece coordinate system needs to be created for each set of fixtures. When performing the measurement in step S3, the corresponding workpiece coordinate system is selected according to the fixture.

[0008] Furthermore, in step S3, all springs on the same side of the strip are measured in sequence. After the measurement is completed, steps S2 and S3 are repeated to measure all springs on the other side of the strip.

[0009] An embodiment of the present invention further provides a device for accurately measuring the spring height in a strip spring, comprising a frame, a conveying module, and a detection mechanism, wherein the conveying module is arranged on the frame, and the detection mechanism comprises a mounting frame, a lifting module, a translation module, a probe holder, and a contact probe, wherein the mounting frame is arranged on the frame, the lifting module is arranged on the mounting frame, the translation module is supported on the lifting module by a first slider, the translation module is arranged horizontally, the probe holder is supported on the translation module by a second slider, and the contact probe is arranged at the lower end of the probe holder; The probe bracket is a U-shaped bracket, the horizontal side of the U-shaped bracket is connected to the second slider, the two vertical sides of the U-shaped bracket face downward, and the number of the contact probes is two, and the two contact probes are respectively arranged on the inner side of the lower ends of the two vertical sides of the U-shaped bracket; A shearing mechanism is also provided on the mounting frame, and the shearing mechanism includes a shearing cylinder, a scissors support plate and a pneumatic shear. The shearing cylinder is arranged on the mounting frame, the scissors support plate is arranged on the piston rod of the shearing cylinder, and the pneumatic shear is arranged on the lower side of the scissors support plate. The workstation corresponding to the conveying module and the detection mechanism is the detection workstation, and the workstation corresponding to the conveying module and the shearing mechanism is the shearing workstation, and the shearing workstation is located behind the detection workstation.

[0010] Furthermore, the conveying module includes a first linear module, and the first linear module is used to convey the workpiece to be measured; The lifting module includes a second linear module, and the second linear module is used to drive the translation module to move in the vertical direction; The translation module includes a third linear module, and the third linear module is used to drive the probe bracket to move in the horizontal direction.

[0011] Furthermore, a slide is provided on the conveying module, and a clamping assembly is provided on the slide, and the slide includes a zero-point base and a zero-point chuck, and the zero-point base slides with the conveying module, and the zero-point chuck is arranged at the upper end of the zero-point base, and the clamping assembly includes a fixed clamp seat and a movable clamp seat, and the movable clamp seat slides with the fixed clamp seat, and a zero-point rivet is provided at the bottom of the fixed clamp seat, and the zero-point rivet is used to be clamped and connected with the zero-point chuck, and an installation cavity is provided between the fixed clamp seat and the movable clamp seat, and a self-locking mechanism and an unlocking mechanism are provided in the installation cavity, and the self-locking mechanism is used to put the fixed clamp seat and the movable clamp seat in a clamped state, and the unlocking mechanism is used to put the fixed clamp seat and the movable clamp seat in an open state.

[0012] Furthermore, the self-locking mechanism includes a mounting block and a self-locking spring, the mounting block is connected to the fixed fixture seat, one end of the self-locking spring is connected to the mounting block, and the other end is connected to the movable fixture seat; the unlocking mechanism includes an unlocking cylinder and an air intake seat, the air intake seat is arranged at the upper end of the zero point base, the unlocking cylinder is arranged in the mounting cavity, and a gas channel is provided in the fixed fixture seat, and the gas channel connects the air intake seat and the unlocking cylinder.

[0013] Furthermore, a first conductive contact is provided at the upper end of the zero point base, and a second conductive contact is provided at the lower end of the fixed fixture seat at a position corresponding to the first conductive contact, the first conductive contact abuts the second conductive contact, and a sensor is provided on the unlocking cylinder, and the second conductive contact is connected to the sensor through a wire; a first guide block is provided on the fixed fixture seat, and a second guide block is provided on the movable fixture seat, the first guide block and the second guide block are slidably matched, and a rivet hole is provided on the top of the movable fixture seat.

[0014] Furthermore, the fixed clamp seat includes a first base portion and a first clamping portion, the first clamping portion is arranged on one side of the first base portion, and the movable clamp seat includes a second base portion and a second clamping portion, the second clamping portion is arranged on one side of the second base portion, and the first clamping portion and the second clamping portion form a clamping area; a first notch is provided on the first clamping portion, and a second notch is provided on the second clamping portion, and the first notch corresponds to the second notch.

[0015] The beneficial effects of the present invention are: The method for accurately measuring the spring height in a strip spring provided in an embodiment of the present invention creates a workpiece coordinate system for the fixture, thereby compensating for the installation error of the fixture, thereby being able to accurately measure the relative height of the spring and the strip, avoiding the occurrence of misjudgment, and better ensuring production quality.

[0016] The device for accurately measuring the height of strip springs provided by the embodiments of the present invention is highly automated and easy to use. The detection mechanism can detect the height and position of the strip springs, assessing the welding quality of the strip springs from multiple dimensions, thus ensuring reliable detection. The shearing mechanism can shear unqualified springs, facilitating rapid identification of qualified and unqualified springs at subsequent unloading stations, allowing for accurate sorting and placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a device for accurately measuring the spring height in a strip spring provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the combination of the detection mechanism and the shearing mechanism; Figure 3 It is a schematic diagram of the combination of the slide and the clamping assembly; Figure 4 A schematic structural diagram of a clamping assembly from one perspective; Figure 5 A structural diagram of the clamping assembly from another perspective.

[0019] In the figure: 1-frame; 11-transport module; 2-slide; 21-zero-point base; 22-zero-point clamp; 23-first conductive contact; 24-second conductive contact; 3-clamping assembly; 31-fixed fixture seat; 311-first base portion; 312-first clamping portion; 313-first guide block; 314-first notch; 315-zero-point rivet; 32-movable fixture seat; 321-second base portion; 322-second clamping portion; 323-Second guide block; 324-Second notch; 325-Rivet hole; 33-Mounting block; 34-Self-locking spring; 35-Unlocking cylinder; 36-Inlet seat; 4-Detection mechanism; 41-Mounting frame; 42-Lifting module; 43-Translation module; 44-Probe bracket; 45-Contact probe; 46-First slider; 47-Second slider; 5-Shearing mechanism; 51-Shearing cylinder; 52-Scissor support plate; 53-Pneumatic shears. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0021] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0024] Example 1 A first embodiment of the present invention provides a method for accurately measuring the spring height of a strip spring, comprising the following steps: S1: The fixture holding the workpiece is transported to the inspection station through the conveying module. The workpiece includes a strip and a spring, and the springs are suspended at intervals along the length of the strip.

[0025] S2: Create a workpiece coordinate system (x0, y0, z0); the x-axis direction of the workpiece coordinate system is the width direction of the workpiece, the y-axis direction is the length direction of the workpiece, and the z-axis direction is the height direction of the workpiece.

[0026] In this embodiment, the workpiece coordinate system is created in the following manner: a contact probe is used to first collect the coordinates of three different points on the large side surface of one side of the workpiece strip to create a surface feature, then collect the coordinates of two points on the upper end surface of the strip to create a line feature, and then collect the coordinates of a point on the end surface of one end of the strip in the length direction to create a point feature. The coordinate system of the workpiece can be created through the above-mentioned surface features, line features and point features.

[0027] In this embodiment, the positions of point collection are as follows: the three points on the large side are two points near the upper position at both ends and one point near the lower position in the middle; the two points on the upper end are close to the two end positions in the length direction, and the point in the length direction is on the left end face of the strip.

[0028] In this step, if there are multiple sets of fixtures, a workpiece coordinate system needs to be created for each set of fixtures. When performing the measurement in step S3, the corresponding workpiece coordinate system is selected according to the fixture.

[0029] S3: Use a contact probe to press the arc-shaped top of the spring in the x-axis direction. When the pressure reaches a certain value, the contact probe is triggered. The absolute value of the x-axis coordinate at this time is the height of the spring's top relative to the strip.

[0030] In this step, all springs on the same side of the strip are measured in sequence. After the measurement is completed, steps S2 and S3 are repeated to measure all springs on the other side of the strip.

[0031] The method for accurately measuring the spring height in a strip spring provided by an embodiment of the present invention creates a workpiece coordinate system for the fixture, thereby compensating for the installation error of the fixture, thereby being able to accurately measure the relative height of the spring and the strip, avoiding the occurrence of misjudgment, and better ensuring production quality.

[0032] Example 2 refer to Figure 1As shown, the second embodiment of the present invention provides a device for accurately measuring the spring height of a strip spring, including a frame 1, a conveying module 11 and a detection mechanism 4.

[0033] The rack 1 supports other components and can be a frame structure or a table structure.

[0034] The conveying module 11 is set on the frame 1, and the conveying module 11 includes a first linear module. The first linear module is used to convey the workpiece to be measured. The first linear module can adopt a synchronous belt type conveying module or a ball screw type conveying module. In this embodiment, a ball screw type conveying module is adopted, which has stable transmission and high transmission accuracy.

[0035] refer to Figure 2 As shown, the detection mechanism 4 includes a mounting frame 41, a lifting module 42, a translation module 43, a probe holder 44 and a contact probe 45. The mounting frame 41 is arranged on the frame 1 and is located on one side of the conveying module 11. The lifting module 42 includes a second linear module, which is arranged on the mounting frame 41 and is vertically arranged. The translation module 43 includes a third linear module, which is supported on the second linear module by a first slider 46, and the first slider 46 is connected to the sliding component in the second linear module. The probe holder 44 is supported on the third linear module by a second slider 47, and the second slider 47 is connected to the sliding component in the third linear module. In this embodiment, the probe holder 44 is a U-shaped holder, the horizontal side of the U-shaped holder is connected to the second slider 47, and the two vertical sides of the U-shaped holder face downward. There are two contact probes 45, and the two contact probes 45 are respectively arranged on the inner side of the lower end of the two vertical sides of the U-shaped holder. In this way, the second linear module can drive the first slider 46 to move up and down in the vertical direction. When the first slider 46 moves, it can drive the third linear module to move synchronously. The third linear module drives the probe bracket 44 and the contact probe 45 to move in the vertical direction to adjust the height of the contact probe 45. Then the third linear module can drive the probes to move in the horizontal direction to adjust the horizontal position of the contact probe 45. Through the coordinated action of the second linear module and the third linear module, the contact probe 45 can be adjusted to the position of the workpiece that needs to be detected.

[0036] The mounting frame 41 is also provided with a shearing mechanism 5, which includes a shearing cylinder 51, a shearing support plate 52 and a pneumatic shear 53. The shearing cylinder 51 is arranged on the mounting frame 41, and the piston rod of the shearing cylinder 51 is parallel to the ground and perpendicular to the conveying module 11. The shearing support plate 52 is arranged on the piston rod of the shearing cylinder 51, and the pneumatic shear 53 is arranged on the lower side of the shearing support plate 52. The station corresponding to the conveying module 11 and the detection mechanism 4 is the detection station, and the station corresponding to the conveying module 11 and the shearing mechanism 5 is the shearing station, which is located behind the detection station. When the detection station detects that the welded workpiece is unqualified, the conveying module 11 transports the workpiece to the shearing station, the piston rod of the shearing cylinder 51 extends, driving the shearing support plate 52 and the pneumatic shear 53 close to the workpiece, and then the pneumatic shear 53 cuts the unqualified workpiece, thereby facilitating the subsequent unloading station to quickly identify whether the workpiece is qualified, and then separate the qualified workpiece from the unqualified workpiece.

[0037] A slide 2 is provided on the conveying module 11 , and a clamping assembly 3 is provided on the slide 2 .

[0038] refer to Figure 3 As shown, the slide 2 includes a zero-point base 21 and a zero-point chuck 22. The zero-point base 21 slidably engages with the conveyor module 11 and is connected to the nut of the lead screw mechanism in the material conveyor module 11. The conveyor module 11 is used to drive the zero-point base 21 along its length. Two zero-point chucks 22 are disposed at the upper end of the zero-point base 21. Each zero-point chuck 22 has a rivet hole 325 in its center. The zero-point chuck 22 can utilize existing technology or be designed as needed.

[0039] refer to Figure 4 and 5 As shown, the clamping assembly 3 includes a fixed clamp seat 31 and a movable clamp seat 32 .

[0040] The fixed clamp seat 31 includes a first base portion 311 and a first clamping portion 312, and the first clamping portion 312 is arranged on one side of the first base portion 311. The movable clamp seat 32 includes a second base portion 321 and a second clamping portion 322, and the second clamping portion 322 is arranged on one side of the second base portion 321. The second base portion 321 slides with the first base portion 311, and the first clamping portion 312 and the second clamping portion 322 form a clamping area. In this embodiment, the fixed clamp seat 31 is provided with a first guide block 313, the number of which is two, and the two first guide blocks 313 are distributed near the two ends of the upper end of the fixed clamp seat 31. The movable clamp seat 32 is provided with a second guide block 323, the number of which is two, and the two second guide blocks are fixed to the lower end of the movable clamp seat 32 near the two ends. The first guide block 313 and the second guide block 323 are connected by a snap connection and slide in engagement at the snap connection. This not only connects the fixed clamp seat 31 and the movable clamp seat 32 together, making them difficult to separate, but also ensures that the movable clamp seat 32 can slide relative to the fixed clamp seat 31 without displacement. Of course, a slide groove can also be provided on the first base portion 311, and a sliding portion can be provided on the second base portion 321, with the sliding portion sliding in engagement with the slide groove.

[0041] The first clamping portion 312 is provided with a first notch 314, and the second clamping portion 322 is provided with a second notch 324. The first notch 314 corresponds to the second notch 324. There are multiple first notches 314 distributed along the length of the first clamping portion 312. There are multiple second notches 324 distributed along the length of the second clamping portion 322. The first notches 314 and the second notches 324 correspond one-to-one. The first notches 314 and the second notches 324 are provided to facilitate clamping and welding of the spring.

[0042] The bottom of the fixed clamp base 31 is equipped with a zero-point rivet 315, which is used to connect with the zero-point clamp 22. There are two zero-point rivets 315, each corresponding to a zero-point clamp 22. The zero-point rivets 315 and the zero-point clamp 22 can be made of standard parts, which provides a stable fit and convenient connection and separation.

[0043] A groove is provided on the upper side of the first base portion 311 and / or the lower side of the second base portion 321 to form a mounting cavity, and a self-locking mechanism and an unlocking mechanism are provided in the mounting cavity.

[0044] The self-locking mechanism includes a mounting block 33 and a self-locking spring 34. The mounting block 33 is connected to the fixed clamp seat 31. One end of the self-locking spring 34 is connected to the mounting block 33, and the other end is connected to the movable clamp seat 32. The axial direction of the self-locking spring 34 is consistent with the sliding direction of the movable clamp seat 32 relative to the fixed clamp seat 31. After the self-locking spring 34 is installed, it is in a compressed state. Under the action of the elastic force of the self-locking spring 34, the first clamping portion 312 and the second clamping portion 322 can be in a clamped state.

[0045] The unlocking mechanism includes an unlocking cylinder 35 and an air intake seat 36. The air intake seat 36 is located at the upper end of the zero-point base 21. The unlocking cylinder 35 is located within the mounting cavity. The cylinder body of the unlocking cylinder 35 is fixed to the fixed fixture seat 31. The piston rod of the unlocking cylinder 35 is connected to the movable fixture seat 32. An air passage is provided within the fixed fixture seat 31, connecting the air intake seat 36 and the unlocking cylinder 35. The air intake seat 36 is connected to the air generator via an air pipe. When the cam 32 is in the unlocked position, the first and second clamping portions 312 and 322 are in the unlocked position, so that the workpiece can be placed in the clamping area or the workpiece in the clamping area can be taken out; when the piston rod of the unlocking cylinder 35 is extended, the first and second clamping portions 312 and 322 are in the clamped state, and the first and second clamping portions 312 and 322 can clamp the workpiece. At this time, if the zero-point rivet 315 and the zero-point chuck 22 are separated, that is, the clamping assembly 3 is separated from the slide 2, the first and second clamping portions 312 and 322 can still maintain the workpiece in the clamped state under the action of the self-locking mechanism.

[0046] A rivet hole 325 is also provided on the top of the movable clamp seat 32. The number of the rivet holes 325 is one, two or more. In this embodiment, the number of the rivet holes 325 is two. The setting of the rivet holes 325 is to facilitate other mechanisms to grasp it, thereby separating the clamping component 3 from the slide 2 and transferring the clamping component 3.

[0047] A first conductive contact 23 is also provided at the top of the zero-point base 21. A conductive wire is connected to the first conductive contact 23 for connection to a power source. A second conductive contact 24 is provided at the bottom of the fixed fixture base 31, corresponding to the first conductive contact 23. The first conductive contact 23 and the second conductive contact 24 abut against each other. A sensor is provided on the unlocking cylinder 35. The second conductive contact 24 is connected to the sensor via a wire. The sensor is used to detect the position of the unlocking cylinder 35.

[0048] The working principle of the device for accurately measuring the spring height in a strip spring provided by an embodiment of the present invention is as follows: After the strip spring is welded, it is transported to the inspection station through the conveying module 11, and then the translation module 43 drives the probe bracket 44 to move above the workpiece to be tested, and the lifting module 42 drives the probe bracket 44 to descend, so that the contact probe 45 reaches the set detection height, and the translation module 43 drives the probe bracket 44 to move horizontally again. First, let one contact probe 45 collect information on the springs on one side of the strip in turn, and then let the other contact probe 45 collect information on the springs on the other side of the strip in turn. The collected information is analyzed by the controller to determine whether the strip spring is qualified. For unqualified workpieces, they are transported to the shearing station and destroyed by the pneumatic shears 53. Finally, they are transported to the unloading station, and the qualified workpieces and unqualified workpieces are placed in the corresponding positions respectively.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention using the above technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes, and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the present technical solution.

Claims

1. A method for accurately measuring the spring height in a strip spring, characterized by: The following steps are involved: S1: The fixture holding the workpiece is transported to the inspection station through the conveying module. The workpiece includes a strip and a spring, and the springs are suspended at intervals along the length of the strip; S2: Create a workpiece coordinate system (x0, y0, z0). The x-axis direction of the workpiece coordinate system is the width direction of the workpiece, the y-axis direction is the length direction of the workpiece, and the z-axis direction is the height direction of the workpiece. S3: Use a contact probe to press the arc-shaped top of the spring in the x-axis direction. When the pressure reaches a certain value, the contact probe is triggered. The absolute value of the x-axis coordinate at this time is the height of the spring's top relative to the strip.

2. The method for accurately measuring the spring height of a strip spring according to claim 1, characterized in that: In step S2, a contact probe is used to first collect the coordinates of three different points on the large side surface of one side of the workpiece strip, then collect the coordinates of two points on the upper end surface of the strip, and then collect the coordinates of a point on the end surface of one end in the length direction of the strip, thereby creating a coordinate system for the workpiece. The three points on the large side surface are two points near the upper position at both ends and a point near the lower position in the middle. The two points on the upper end surface are respectively close to the two end positions in the length direction, and the point in the length direction is on the left end surface of the strip.

3. The method for accurately measuring the spring height of a strip spring according to claim 1, characterized in that: In step S2, if there are multiple sets of fixtures, a workpiece coordinate system needs to be created for each set of fixtures. When performing the measurement in step S3, the corresponding workpiece coordinate system is selected according to the fixture.

4. The method for accurately measuring the spring height of a strip spring according to claim 1, characterized in that: In step S3, all springs on the same side of the strip are measured in sequence. After the measurement is completed, steps S2 and S3 are repeated to measure all springs on the other side of the strip.

5. A device for accurately measuring the spring height of a strip spring, characterized by: The apparatus comprises a frame, a conveying module and a detection mechanism, wherein the conveying module is arranged on the frame, and the detection mechanism comprises a mounting frame, a lifting module, a translation module, a probe holder and a contact probe, wherein the mounting frame is arranged on the frame, the lifting module is arranged on the mounting frame, the translation module is supported on the lifting module by a first slider, the translation module is arranged horizontally, the probe holder is supported on the translation module by a second slider, and the contact probe is arranged at the lower end of the probe holder; The probe bracket is a U-shaped bracket, the horizontal side of the U-shaped bracket is connected to the second slider, the two vertical sides of the U-shaped bracket face downward, and the number of the contact probes is two, and the two contact probes are respectively arranged on the inner side of the lower ends of the two vertical sides of the U-shaped bracket; A shearing mechanism is also provided on the mounting frame, and the shearing mechanism includes a shearing cylinder, a scissors support plate and a pneumatic shear. The shearing cylinder is arranged on the mounting frame, the scissors support plate is arranged on the piston rod of the shearing cylinder, and the pneumatic shear is arranged on the lower side of the scissors support plate. The workstation corresponding to the conveying module and the detection mechanism is the detection workstation, and the workstation corresponding to the conveying module and the shearing mechanism is the shearing workstation, and the shearing workstation is located behind the detection workstation.

6. The device for accurately measuring the spring height of a strip spring according to claim 5, characterized in that: The conveying module includes a first linear module, and the first linear module is used to convey the workpiece to be measured; The lifting module includes a second linear module, and the second linear module is used to drive the translation module to move in the vertical direction; The translation module includes a third linear module, and the third linear module is used to drive the probe bracket to move in the horizontal direction.

7. The device for accurately measuring the spring height of a strip spring according to claim 5, characterized in that: The conveying module is provided with a slide, and the slide is provided with a clamping assembly, and the slide includes a zero-point base and a zero-point chuck, and the zero-point base slides with the conveying module, and the zero-point chuck is arranged at the upper end of the zero-point base, and the clamping assembly includes a fixed clamp seat and a movable clamp seat, and the movable clamp seat slides with the fixed clamp seat, and a zero-point rivet is provided at the bottom of the fixed clamp seat, and the zero-point rivet is used to be clamped and connected with the zero-point chuck, and an installation cavity is provided between the fixed clamp seat and the movable clamp seat, and a self-locking mechanism and an unlocking mechanism are provided in the installation cavity, and the self-locking mechanism is used to put the fixed clamp seat and the movable clamp seat in a clamped state, and the unlocking mechanism is used to put the fixed clamp seat and the movable clamp seat in an open state.

8. The device for accurately measuring the spring height of a strip spring according to claim 7, characterized in that: The self-locking mechanism includes a mounting block and a self-locking spring, the mounting block is connected to the fixed fixture seat, one end of the self-locking spring is connected to the mounting block, and the other end is connected to the movable fixture seat; the unlocking mechanism includes an unlocking cylinder and an air intake seat, the air intake seat is arranged at the upper end of the zero point base, the unlocking cylinder is arranged in the mounting cavity, and a gas channel is provided in the fixed fixture seat, and the gas channel connects the air intake seat and the unlocking cylinder.

9. The device for accurately measuring the spring height of a strip spring according to claim 8, characterized in that: A first conductive contact is also provided at the upper end of the zero point base, and a second conductive contact is provided at the lower end of the fixed fixture seat at a position corresponding to the first conductive contact, the first conductive contact abuts against the second conductive contact, and a sensor is provided on the unlocking cylinder, and the second conductive contact is connected to the sensor through a wire; a first guide block is provided on the fixed fixture seat, and a second guide block is provided on the movable fixture seat, the first guide block and the second guide block are slidably matched, and a rivet hole is provided on the top of the movable fixture seat.

10. The device for accurately measuring the spring height of a strip spring according to claim 7, characterized in that: The fixed clamp seat includes a first base portion and a first clamping portion, the first clamping portion is arranged on one side of the first base portion, and the movable clamp seat includes a second base portion and a second clamping portion, the second clamping portion is arranged on one side of the second base portion, and the first clamping portion and the second clamping portion form a clamping area; a first notch is provided on the first clamping portion, and a second notch is provided on the second clamping portion, and the first notch corresponds to the second notch.

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