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CN-122015695-A - Metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning

CN122015695ACN 122015695 ACN122015695 ACN 122015695ACN-122015695-A

Abstract

The invention provides a metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning, and relates to the field of calibration gauges. The metal workpiece positioning device comprises a workpiece placing base, and a workpiece positioning assembly which is arranged in the workpiece placing base and used for positioning metal parts, wherein the workpiece positioning assembly comprises a plurality of positioning columns which penetrate through the top of the workpiece placing base and are distributed in an array mode, an annular groove is formed in the joint of the positioning columns and the workpiece placing base, and a miniature grating ruler is arranged on the side portion of the annular groove. According to the invention, the positioning column and the miniature grating ruler are combined into the sensor array, three-dimensional point cloud data of the bottom surface of the workpiece are directly acquired, the data are fused with upper surface data acquired by the laser scanning equipment under a unified coordinate system, the contour information of the surface of the workpiece can be rapidly and actively acquired, and three-dimensional space posture data of the workpiece are acquired, so that the inspection efficiency of the metal workpiece is higher compared with the inspection efficiency which is realized by mechanically adjusting the laser scanning equipment in the three-dimensional direction.

Inventors

  • Bian Youjun

Assignees

  • 百正科技东台有限公司

Dates

Publication Date
20260512
Application Date
20260126

Claims (10)

  1. 1. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning is characterized by comprising a workpiece placement base, a workpiece positioning assembly, a laser detection assembly and a locking assembly, wherein the workpiece positioning assembly is arranged in the workpiece placement base and used for positioning a metal part; The workpiece positioning assembly comprises a plurality of positioning columns which penetrate through the top of a workpiece placement base and are distributed in an array mode, an annular groove is formed in the joint of the positioning columns and the workpiece placement base, and a miniature grating ruler is arranged on the side portion of the annular groove; a supporting column is welded above the workpiece placement base, and a measuring bracket is welded at the top of the supporting column; the laser detection assembly includes: the laser scanning device is slidably arranged at the bottom of the measuring bracket; the locking assembly comprises clamping air bags arranged around the positioning column, and air inlets are arranged among the three clamping air bags.
  2. 2. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 1, wherein the workpiece positioning assembly further comprises a positioning plate fixed inside the workpiece placement base, the positioning column penetrates through the positioning plate, and a limiting plate is welded at the bottom of the positioning column.
  3. 3. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 2, wherein the workpiece positioning assembly further comprises a reset spring fixed at the bottom of the limiting plate, a telescopic outer rod is installed in the reset spring, a telescopic inner rod is movably arranged in the telescopic outer rod in a penetrating mode, and hydraulic oil is filled at the joint of the telescopic inner rod and the telescopic outer rod.
  4. 4. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 3, wherein the bottom of the positioning plate is fixed with a guide sleeve, the positioning column penetrates through the guide sleeve, and the clamping air bag is arranged in the guide sleeve.
  5. 5. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 4, wherein the positioning column is of a hollow structure, and a negative pressure hole is formed in the top of the positioning column.
  6. 6. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 5, wherein the locking assembly further comprises a filter box arranged on the side part of the workpiece placement base, and the side part of the filter box is connected with a positive and negative rotating fan through a pipeline.
  7. 7. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 6, wherein connecting pipes are arranged between the filter box and the positioning column and between the filter box and the clamping air bag, one of the connecting pipes is provided with a first electromagnetic valve, the first electromagnetic valve is arranged on the connecting pipe between the filter box and the positioning column, the other connecting pipe is provided with a second electromagnetic valve, and the second electromagnetic valve is arranged on the connecting pipe between the filter box and the clamping air bag.
  8. 8. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 7, wherein the locking assembly further comprises a first filter plate, a second filter plate and a third filter plate which are detachably arranged in the filter box, the first filter plate, the second filter plate and the third filter plate are sequentially distributed from left to right, and a sealing door is arranged at the front end of the filter box, so that the first filter plate, the second filter plate and the third filter plate in the filter box can be replaced conveniently.
  9. 9. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 8, wherein the laser detection assembly further comprises two guide brackets arranged on the end face of the bottom of the measuring bracket, a cross rod is arranged between the two guide brackets, a longitudinal rod is connected below the cross rod in a sliding manner through a wire sleeve, transmission screw rods are respectively and rotatably connected inside the longitudinal rod and the cross rod, a transverse motor is fixed at one end part of one transmission screw rod, a longitudinal motor is fixed at the other end part of the transmission screw rod, and the laser scanning device is connected below the longitudinal rod in a sliding manner through the wire sleeve.
  10. 10. The metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning of claim 9, wherein a control assembly is arranged in the measuring support, the control assembly is electrically connected with a transverse motor, a longitudinal motor, a positive and negative rotation fan, a first electromagnetic valve, a second electromagnetic valve and a miniature grating ruler, and reference balls are arranged at four corners of the end part of the workpiece placement base.

Description

Metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning Technical Field The invention relates to the field of calibration detectors, in particular to a metal push-in intelligent dynamic calibration detector based on multi-dimensional laser scanning. Background In the current highly automated manufacturing industry, metal stamping parts, casting parts and precision machining parts are used as core basic components, and are widely applied to the fields of automobiles, aerospace, precision instruments, high-end equipment and the like. The stability and consistency of the quality of the work pieces, especially the "push-in" pieces (i.e. the semi-finished products that are offered up and down in the production process) that are transported through the intermediate manufacturing process, directly determine the performance, reliability and safety of the final product. Therefore, the rapid, accurate and efficient size detection and dynamic calibration of the metal workpieces in the production process have become an indispensable key link in modern intelligent manufacturing. Currently, the following two types of inspection tools are commonly used in the industry: 1. The special gauge is a fixed physical tool designed and manufactured according to an ideal three-dimensional digital model (CAD) of a specific workpiece, such as a detection clamping plate, a go-no-go gauge, a special fixture, a gauge and the like. The gauge is usually manually operated by a skilled technician, and by physically attaching the gauge to a workpiece and by means of binary judgment of pass/fail or gauge measurement, whether the critical dimension and form and position tolerance are within the allowable range or not is checked. However, the defect is obvious that one checking fixture can only correspond to one or one series of specific workpieces, and once the product design is changed, the original special checking fixture is immediately invalid and needs to be redesigned; the special gauge generally only provides qualitative conclusions of "pass" or "fail" and cannot provide quantitative, continuous deviation data; for a workpiece with a complex structure, the special gauge is often complicated in structural design and inconvenient to operate; 2. The three-coordinate measuring machine moves in three directions through the probe, contacts the surface of the workpiece and collects the space coordinates of points, and the size and form and position tolerance of each item of the workpiece are calculated through software. However, three-coordinate measurement is usually required to be performed in a constant temperature and humidity precise measuring room, belongs to off-line detection, and a workpiece needs to be taken down, transported and waited to be measured from a production line, so that the whole process is long in time, the instantaneous state of the production line cannot be reflected in real time, the production takt is seriously delayed, 100% full detection cannot be realized, the trigger type measurement efficiency is low, a scanning type measuring head can acquire more data, the speed is still lower than that of optical measurement, and the risk of deformation of a thin-wall part due to the contact force of the measuring head exists. In summary, the current field of metal workpiece online detection faces a serious challenge that a special gauge cannot adapt to flexible production and a three-coordinate measuring machine cannot meet the online rhythm. Disclosure of Invention The invention aims to provide a metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning so as to solve the problems in the background technology. The technical scheme includes that the metal push-in intelligent dynamic calibration gauge based on multi-dimensional laser scanning comprises a workpiece placement base, a workpiece positioning assembly, a laser detection assembly and a locking assembly, wherein the workpiece positioning assembly is arranged in the workpiece placement base and used for positioning a metal part; The workpiece positioning assembly comprises a plurality of positioning columns which penetrate through the top of a workpiece placement base and are distributed in an array mode, an annular groove is formed in the joint of the positioning columns and the workpiece placement base, and a miniature grating ruler is arranged on the side portion of the annular groove; a supporting column is welded above the workpiece placement base, and a measuring bracket is welded at the top of the supporting column; the laser detection assembly includes: the laser scanning device is slidably arranged at the bottom of the measuring bracket; the locking assembly comprises clamping air bags arranged around the positioning column, and air inlets are arranged among the three clamping air bags. As a still further scheme of the invention, the workpiece positioning assembly further comprises a p