CN112504128A

CN112504128A - Spring detection device

Info

Publication number: CN112504128A
Application number: CN202011608290.XA
Authority: CN
Inventors: 王飞阳; 庄金雷; 陈盟; 高云峰; 曹雏清
Original assignee: Wuhu Hit Robot Technology Research Institute Co Ltd
Current assignee: Wuhu Hit Robot Technology Research Institute Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-03-16

Abstract

The invention discloses a spring detection device which comprises a detection table, a rotary table, a base plate, a sliding table support, a laser profiler and a linear translation table, wherein the rotary table is arranged on the detection table and used for driving a spring to be detected to rotate, the base plate is arranged on the detection table, the sliding table support is arranged on the base plate, the laser profiler is movably arranged on the sliding table support and used for scanning the spring to be detected, and the linear translation table is arranged on the sliding table support and used for controlling the laser profiler to move along the vertical direction. According to the spring detection device, the turntable, the linear translation table and the laser profiler are combined, so that the whole area of the spring is scanned, all the appearance parameters of the spring can be measured, the distribution change condition of the appearance parameters of the spring along the spiral line of the spring can be monitored, and the high-precision measurement of the spring is realized.

Description

Spring detection device

Technical Field

The invention belongs to the technical field of automatic production equipment, and particularly relates to a spring detection device.

Background

The spring is a common industrial mechanical part, the forming size of the spring is one of important indexes for measuring the quality of the spring, and as shown in fig. 3, several important design parameters exist before the spring is processed and produced: the wire diameter D, the outer diameter D, the inner diameter D1, the middle warp D2, the pitch p, the number of turns n and the like, and other relevant important design parameters can be obtained through calculation of the design parameters, such as the winding ratio C (C ═ D2/D), the helix angle a

And the like. After the automatic production line processes the spring, in order to judge whether the processed and formed spring meets the quality requirement, the detection of the forming size is an indispensable link.

The existing spring detection device and method mainly have two types, the first type is a special detection tool, namely the special detection tool is designed according to the appearance and tolerance requirements of the spring, and whether the spring is qualified or not is visually judged according to the state of the spring in the special detection tool; the second type is a detection method based on two-dimensional vision, which cancels the disadvantage of visual detection of a detection tool and can automatically realize quantitative measurement of the spring appearance parameters, but has the defect that only a few appearance parameters of the spring can be measured, for example, an industrial vision system can take pictures from the axis direction of the spring, only the outer diameter, the inner diameter, the middle diameter and the diameter of the spring wire can be obtained, and key appearance dimensions such as pitch cannot be obtained. Therefore, the existing spring detection method is complex in detection operation and limited in the number of outline parameters of the detected spring.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a spring detection device, and aims to realize automatic measurement of a spring and quantitative measurement of all the overall dimensions of the spring.

In order to achieve the purpose, the invention adopts the technical scheme that: spring detection device, including examining test table, set up in examining test table and be used for driving and wait to detect the spring and carry out pivoted revolving stage, set up in examining test table backing plate, set up the slip table support on the backing plate, mobilizable set up on the slip table support and be used for treating the laser profile appearance that detects the spring and scan and set up on the slip table support and be used for controlling the linear translation platform that the laser profile appearance removed along vertical direction.

The distance between the sliding table support and the rotary table is adjustable.

The backing plate passes through the bolt and installs examine test table is last, examine test table and have and let bolt male mounting hole, and the mounting hole sets up a plurality ofly and all mounting holes and arranges in proper order for the length direction along the backing plate, the slip table support with the revolving stage is in on the same straight line that parallels with the length direction of backing plate.

The detection table is arranged on the control cabinet.

According to the spring detection device, the turntable, the linear translation table and the laser profiler are combined, so that the whole area of the spring is scanned, all the appearance parameters of the spring can be measured, the distribution change condition of the appearance parameters of the spring along the spiral line of the spring can be monitored, and the high-precision measurement of the spring is realized.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic view of the spring testing device of the present invention;

FIG. 2 is a schematic view of a laser profiler scanning two coils of a spring simultaneously;

FIG. 3 is a major form factor graph of a spring;

labeled as: 1. a control cabinet; 2. a detection table; 3. a turntable; 4. a claw; 5. a spring to be detected; 6. a control button; 7. a display; 8. a base plate; 9. a sliding table bracket; 10. a linear translation stage; 11. laser profilometer.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1, the invention provides a spring detection device, which comprises a detection table 2, a rotary table 3 arranged on the detection table 2 and used for driving a spring 5 to be detected to rotate, a backing plate 8 arranged on the detection table 2, a sliding table support 9 arranged on the backing plate 8, a laser profiler 11 movably arranged on the sliding table support 9 and used for scanning the spring 5 to be detected, and a linear translation table 10 arranged on the sliding table support 9 and used for controlling the laser profiler 11 to move along the vertical direction.

Specifically, as shown in fig. 1, the detection table 2 is disposed on the control cabinet 1, the backing plate 8 is fixedly disposed on the top surface of the detection table 2, and the slide table bracket 9 is vertically mounted on the top surface of the backing plate 8. The inside of switch board 1 is provided with industrial computer, the controller of revolving stage 3, linear translation platform 10's controller and laser profile appearance 11's controller electrical equipment such as, and the inside of switch board 1 sets up the motor that is used for controlling revolving stage 3 to rotate, and the motor is connected with revolving stage 3, and the rotation center line of revolving stage 3 is vertical line. Set up jack catch 4 on revolving stage 3, jack catch 4 installs on revolving stage 3, and jack catch 4 is used for the fixed spring 5 that waits to detect, and jack catch 4 sets up four altogether, and four jack catches 4 use revolving center line of revolving stage 3 as central line along circumference evenly distributed. Treat that detect spring 5 is vertical state and places on jack catch 4, revolving stage 3 drives jack catch 4 and rotates, and jack catch 4 drives and detects synchronous rotation of detecting spring 5. The detection table 2 is provided with a control panel, the control panel is provided with a control button 6, and the control button 6 is used for controlling the start and stop of the detection system, the emergency stop, the forward and reverse rotation of the rotary table 3 and the like. The display 7 is arranged on the detection table 2, and the display 7 is used for displaying a software operation interface and displaying a detection result, so that interaction with a user is facilitated. The laser contourgraph 11 is used for scanning the spring wire of the spring 5 to be detected and acquiring point cloud data of the outer side surface of the spring wire. Linear translation platform 10 fixed mounting is in the upper end of slip table support 9, and linear translation platform 10 is used for driving laser profile appearance 11 to carry out translation from top to bottom.

As shown in fig. 1, as preferred, the distance between the sliding table support 9 and the turntable 3 is adjustable, the lower end of the sliding table support 9 is fixedly connected with the backing plate 8, the sliding table support 9 is vertically arranged, the backing plate 8 is installed on the detection table 2 through bolts, the detection table 2 is provided with mounting holes for inserting bolts, the backing plate 8 is provided with through holes for passing bolts, the mounting holes are provided with a plurality of mounting holes and are sequentially arranged along the length direction of the detection table 2, the mounting holes are threaded holes arranged on the top surface of the detection table 2, the sliding table support 9 and the turntable 3 are positioned on the same straight line parallel to the length direction of the backing plate 8, the length direction of the backing plate 8 is horizontal, and the length direction of the backing plate 8 is perpendicular to the rotation center line of the turntable 3. The bolts are inserted into the mounting holes at different positions, so that the distance between the sliding table support 9 and the rotary table 3 can be adjusted, namely the distance between the laser profiler 11 and the spring 5 to be detected is adjusted, the laser profiler 11 can just scan the starting point of the first circle of the spring wire of the spring 5 to be detected at the initial position, the accuracy of a detection result is ensured, and the universality of the detection device can also be improved.

The process of detecting the spring by using the spring detection device with the structure comprises the following steps:

(1) installing a spring 5 to be detected on a clamping jaw 4, adjusting the circumferential position of the spring 5 to be detected to enable the starting point of the first circle of the spring wire of the spring 5 to be detected to be opposite to the laser profiler 11, and adjusting the clamping jaw 4 to enable the spring 5 to be detected to be fixed;

(2) the linear translation stage 10 drives the laser profiler 11 to move, so that the laser profiler 11 moves to a zero position;

(3) adjusting the position of the backing plate 8 to enable the laser profiler 11 at the initial position to just scan the starting point of the first turn of the spring wire of the spring 5 to be detected;

(4) pressing a start button on a control panel, slowly rotating the rotary table 3, driving the laser profiler 11 to move upwards by the linear translation table 10, and scanning the laser profiler 11 to the outer side surface of the spring wire of the whole spring;

(5) the rotation speed of the turntable 3 and the movement speed of the linear translation stage 10 must satisfy certain conditions: when the rotary table 3 rotates for 1 circle, the linear translation table 10 drives the laser profiler 11 to move upwards for a set distance, the set distance is the pitch of the spring, and at the moment, the laser profiler 11 just scans 1 circle of the spring wire; since the scanning range of the laser profiler 11 is larger than the cross section of the spring wire, the above conditions allow for certain errors;

(6) through scanning, point cloud data of the outer side face of the spring wire under the coordinate system of the linear translation table 10 can be obtained, and the spring appearance parameters can be calculated through a point cloud processing algorithm.

In the detection process, the rotary table 3 is controlled to rotate anticlockwise for the left-handed spring; for the right-handed spring, the turntable 3 is controlled to rotate clockwise.

Preferably, the laser profiler 11 with a larger working area can be selected in the spring detection device, so that the detection accuracy and stability of the system can be improved. As shown in fig. 2, the isosceles trapezoid area is a working area of the laser profiler 11, the selection requirement of the laser profiler 11 is that the minimum working area of the laser profiler must cover the diameter of a single coil spring wire of a spring (as shown in the left diagram of fig. 2), and if the laser profiler 11 with a larger working area is selected, the laser profiler can scan the spring wire on an adjacent coil at one time (as shown in the right diagram of fig. 2), so that the repeated scanning of the spring can be realized, more spring point cloud data can be obtained, and the measurement accuracy and stability can be further improved.

The spring detection device with the structure has the following advantages:

(1) after the spring is clamped, automatic scanning detection of the spring can be realized, manual intervention is not needed in the scanning process and the data processing process, and a one-key detection function is realized;

(2) the full-size measurement of the spring can be realized, and the measurement of the outer diameter, the middle diameter, the inner diameter, the diameter of the spring wire, the number of turns, the expansion length, the pitch, the winding ratio and the helix angle of the spring can be realized;

(3) the distributed measurement of the core parameters of the spring is realized, and some parameters of the spring may have different conditions at different axial positions of the spring, such as the difference of the pitches of different coils of the spring, the difference of the diameters of spring wires of different coils of the spring, and the like.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. Spring detection device, its characterized in that: including examining test table, set up in examining test table and be used for driving to wait to detect the spring and carry out pivoted revolving stage, set up backing plate on examining test table, set up the slip table support on the backing plate, mobilizable set up on the slip table support and be used for treating the laser profile appearance that detects the spring and carry out the scanning and set up on the slip table support and be used for controlling the linear translation platform that the laser profile appearance removed along vertical direction.

2. The spring tester of claim 1, wherein: the distance between the sliding table support and the rotary table is adjustable.

3. The spring detecting device according to claim 1 or 2, wherein: the backing plate passes through the bolt and installs examine test table is last, examine test table and have and let bolt male mounting hole, and the mounting hole sets up a plurality ofly and all mounting holes and arranges in proper order for the length direction along the backing plate, the slip table support with the revolving stage is in on the same straight line that parallels with the length direction of backing plate.

4. The spring detecting device according to any one of claims 1 to 3, wherein: the detection table is arranged on the control cabinet.