CN114248024B - Positioning system for laser cutting - Google Patents
Positioning system for laser cutting Download PDFInfo
- Publication number
- CN114248024B CN114248024B CN202010996826.3A CN202010996826A CN114248024B CN 114248024 B CN114248024 B CN 114248024B CN 202010996826 A CN202010996826 A CN 202010996826A CN 114248024 B CN114248024 B CN 114248024B
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- jacking
- product
- assembly
- sensor
- plate
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- 238000003698 laser cutting Methods 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 239000000523 sample Substances 0.000 claims description 20
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
Abstract
The invention discloses a positioning system for laser cutting, which is used for positioning the laser processing of a product and comprises at least one pair of displacement sensing mechanisms for positioning the position of the product and a processor, wherein signals of the displacement sensing mechanisms are connected with the processor, and each pair of displacement sensors are positioned on opposite sides of the product; each displacement sensing mechanism comprises a sensor assembly, a moving assembly and a jacking assembly. The sensor component collects different position information of the product and sends the information to the processor, and the processor calculates and analyzes the information to obtain the relative position information of the product. At least one pair of displacement sensing mechanisms are used for collecting data of product positions of products, the sensor assembly is contacted with the edges of the products through the moving assembly and the jacking assembly, the positions of the products are sent to the processor, and the processor obtains relative position information of the products after operation and analysis. The positioning process of the whole laser cutting positioning system is accurate, and the processing precision of products can be ensured.
Description
Technical Field
The invention relates to the field of laser processing, in particular to a positioning system for laser cutting.
Background
With the progress of technology development, many products require high-precision processing.
According to the prior art, a product is clamped and ejected in the Z direction through an air cylinder, one side of the product is a fixed mode side in the Y direction, and the other side of the product is pushed to tightly push a workpiece by the air cylinder. When the conveyor belt conveys the workpiece in place, the cylinder clamps the workpiece with the positioning block or the positioning wheel, and pushes the other side of the workpiece onto the wheel of the fixed side or the positioning block. The workpiece moves forward and is blocked by a blocking cylinder, and when the workpiece is conveyed to a designated position, the workpiece contacts the blocking cylinder to stop. And after the position is stopped, carrying out deep processing according to the actual application condition.
The prior art has the following defects:
(1) When the cylinder is lifted, the air pressure is insufficient or the stroke is not pushed in place, the precision of the position of the product cannot be ensured, the yield is reduced, and even the product is scrapped.
(2) The regular positioning mode of the product is carried out in the Y direction by adopting a cylinder pushing-out mode, the workpiece can be pushed when moving, and if the workpiece is pushed hard under the condition of no movement, the risk of not being pushed in place exists, so that the processed size of the product is unqualified. Unstable mode of blocking the positioning of the cylinder and troublesome debugging are also generated. It is basically impossible to quickly perform specification switching of a product if the product needs to be highly accurate.
(3) The Y direction is loaded down with trivial details in installation and debugging when changing the specification of product, and the fixed limit location of removal does not have the datum point, and the debugging cycle is long.
(4) The positioning mode of side pushing clamping and blocking is low in efficiency and poor in economic efficiency.
Disclosure of Invention
The invention aims to provide a laser cutting positioning system with simple structure and accurate positioning.
The invention discloses a positioning system for laser cutting, which is used for positioning the laser processing of a product and comprises at least one pair of displacement sensing mechanisms for positioning the position of the product and a processor, wherein signals of the displacement sensing mechanisms are connected with the processor, and each pair of displacement sensors are positioned on opposite sides of the product;
each displacement sensing mechanism comprises a sensor component, a moving component and a jacking component, wherein the sensor component is arranged on the jacking component and can be lifted relative to the jacking component, the jacking component is arranged on the moving component and can move relative to the moving component, and the jacking component is used for driving the sensor component to contact the edge of a product to be processed;
and the sensor component collects different position information of the product and sends the information to the processor, and the processor obtains the relative position information of the product after operation and analysis.
Further, the device comprises two pairs of displacement sensing mechanisms, wherein one pair of displacement sensing mechanisms is used for being arranged on two shorter sides of a product to be processed, and the other pair of displacement sensing mechanisms is used for being arranged on two longer sides of the product to be processed.
Further, the sensor assembly comprises a bottom plate fixed on the jacking assembly, a probe, a displacement sensor, a guide rod and an elastic piece, wherein the probe, the displacement sensor, the guide rod and the elastic piece are arranged on the bottom plate, the probe is arranged at the end part of the guide rod, the elastic piece is sleeved outside the guide rod, and the displacement sensor pushes out the guide rod through the elastic piece, so that the probe is pushed out to contact a product.
Further, the sensor assembly further comprises a pushing-out air cylinder, a connecting plate is arranged on an output shaft of the pushing-out air cylinder, and when the pushing-out air cylinder drives the connecting plate to retract, the guide rod is pressed by the elastic piece to abut against the connecting plate.
Further, an elastic plate is arranged on the connecting plate, and the probe is closer to a product to be processed than the elastic plate.
Further, a blocking table is arranged on the side edge of the connecting plate, a flange is arranged on the outer wall of the guide rod, and the flange can be abutted to the blocking table.
Further, the moving assembly comprises a motor, a guide rail, a sliding block matched with the guide rail and a connecting block fixed on the sliding block, wherein the sliding block is installed on an output shaft of the motor and can slide along the guide rail, and the jacking assembly is fixed on the connecting block.
Further, the motor drive motor further comprises a screw rod installed on an output shaft of the motor and a screw rod nut installed on the screw rod, the sliding block is connected with the screw rod nut, and the motor drives the screw rod to rotate so as to drive the sliding block on the screw rod nut to move along the guide rail.
Further, the jacking assembly comprises a fixing plate fixed on the connecting block, a jacking cylinder installed on the fixing plate and a top plate fixed at the output end of the jacking cylinder, and the sensor assembly is installed on the top plate.
Further, the jacking assembly further comprises a guide assembly, the guide assembly comprises a jacking guide rail installed on the fixing plate, a jacking sliding block matched with the jacking guide rail, and a mounting plate fixed on the jacking sliding block, and the top plate is fixed on the top of the mounting plate.
The technical scheme is that data of product positions are acquired by at least one pair of displacement sensing mechanisms, the sensor assembly is contacted with the edge of the product through the moving assembly and the jacking assembly, the positions of the product are sent to the processor, and the processor calculates and analyzes the relative position information of the product. The positioning process of the whole laser cutting positioning system is accurate, and the processing precision of products can be ensured.
Drawings
Fig. 1 is a schematic structural view of a laser cutting positioning system according to the present invention.
FIG. 2 is a schematic illustration of a displacement sensing mechanism portion of a laser cut positioning system according to the present invention.
Fig. 3 is a schematic structural diagram of a moving component and a lifting component of the positioning system for laser cutting according to the present invention.
Fig. 4 is a top view of a sensor assembly of the laser cut positioning system of the present invention.
Fig. 5 is a partial view of a sensor assembly of a laser cut positioning system according to the present invention.
Detailed Description
The invention is further illustrated and described below in conjunction with specific embodiments and the accompanying drawings.
Referring to fig. 1, the present invention discloses a positioning system for laser cutting, which is used for positioning a product 20 in laser processing, and comprises at least one pair of displacement sensing mechanisms 10 for positioning the product, and a processor, wherein the displacement sensing mechanisms 10 are in signal connection with the processor, and each pair of displacement sensors is located on opposite sides of the product.
Referring to fig. 2, each displacement sensing mechanism 10 includes a sensor assembly 100, a moving assembly 300, and a jacking assembly 500. The sensor assembly 100 is mounted on the jacking assembly 500 and is liftable relative to the jacking assembly 500, the jacking assembly 500 is mounted on the moving assembly 300 and is movable relative to the moving assembly 300, and the jacking assembly 500 is used for driving the sensor assembly 100 to contact the edge of the product to be processed.
The sensor assembly 100 collects different position information of the product and sends the information to the processor, and the processor obtains the relative position information of the product after operation and analysis.
The distance from the sensor assembly 100 to the product driven by the moving assembly 300 and the jacking assembly 500 can be 10-20mm different to ensure that the product cannot collide with the displacement sensing mechanism 10 during conveying. When the specification of the product or the workpiece is changed, the moving assembly 300 drives the sensor assembly 100 to rapidly move to a position away from the edge of the product or the workpiece as long as the size of the product or the workpiece is input. If the size of the product or workpiece is determined, the moving assembly 300 stays at the current coordinate value, and the stay at the current position is the absolute position of the sensor assembly 100.
In this embodiment, the positioning system for laser cutting includes two pairs of displacement sensing mechanisms 10, wherein one pair of displacement sensing mechanisms 10 is used for being disposed on two shorter sides of the product to be processed, and the other pair of displacement sensing mechanisms 10 is used for being disposed on two longer sides of the product to be processed.
When the product is conveyed to a specified position, the two pairs of displacement sensing mechanisms respectively collect data for the product. The displacement sensing mechanism of the shorter side collects information of the short side stop position of the product. The displacement sensing mechanism on the longer side collects information on the long side of the product, information on the short side of the product and information on the stopped position, the position information data are transmitted to the processor, and the processor calculates the collected relative position information so as to achieve accurate positioning of the product.
Referring to fig. 3, the moving assembly 300 includes a motor 310, a guide rail 320, a slider engaged with the guide rail 320, and a connection block 340 fixed to the slider, wherein the slider is mounted on an output shaft of the motor 310 and is slidable along the guide rail 320, and the jacking assembly 500 is fixed to the connection block 340.
In this embodiment, the moving assembly 300 further includes a screw rod installed on an output shaft of the motor 310, and a screw nut installed on the screw rod, where the slider is connected with the screw nut, and the motor 310 drives the screw rod to rotate so as to drive the slider on the screw nut to move along the guide rail 320.
Referring to fig. 3, when the motor 310 moves to drive the screw rod, the screw rod drives the nut, and the nut is moved with the span connection block 340, since the connection block 340 is guided by the slider and the guide rail 320 parallel to the screw rod. The movement of the connection block 340 is a linear direction movement. In this embodiment, the 0 position of the moving assembly 300 is a position at the origin, the guide rail 320 is provided with a positive limit point and a negative limit point, and the absolute position of the moving assembly 300 is a specific position moved from the 0 point according to the size of the product.
Referring to fig. 3, the jacking assembly 500 includes a fixing plate 510 fixed to the connection block 340, a jacking cylinder 530 mounted on the fixing plate 510, and a top plate 550 fixed to an output end of the jacking cylinder 530, and the sensor assembly 100 is mounted on the top plate 550.
The jacking assembly 500 further includes a guide assembly 501. The guide assembly 501 comprises a jacking guide rail 502 mounted on the fixing plate 510, a jacking slide block 503 matched with the jacking guide rail 502, and a mounting plate 504 fixed on the jacking slide block 503, wherein the top plate 550 is fixed on the top of the mounting plate 504. The guide assembly 501 is used for guiding the top plate 550 when the lifting cylinder 530 pushes the top plate upwards and downwards.
In this embodiment, the lifting assembly 500 is configured such that when the displacement sensor 10 returns to zero to find the origin, the lifting cylinder 530 on the lifting assembly 500 is automatically retracted, so that the entire displacement sensor system moves below the lower surface of the product, and the misoperation of the product caused when the displacement sensor 10 returns to zero to find the origin is prevented, and the displacement sensor system or the product is prevented from being damaged.
In addition, when the moving assembly 300 moves to the set absolute position, the jacking cylinder 530 on the jacking assembly 500 is automatically lifted. After the product is processed, the jacking cylinder 530 on the jacking assembly 500 in the opposite direction is retracted according to the direction of the product discharge, allowing the product to be transported away.
Referring to fig. 3, 4 and 5, the sensor assembly 100 includes a base plate 110 fixed on the jacking assembly 500, a probe 120 mounted on the base plate, a displacement sensor 130, a guide rod 140 and an elastic member 150, wherein the probe 120 is mounted on the end of the guide rod 140, the elastic member 150 is sleeved outside the guide rod 140, and the displacement sensor 130 pushes out the guide rod 140 through the elastic member 150, so that the probe 120 is pushed out to contact a product. In this embodiment, the elastic member 150 is a spring.
The sensor assembly 100 further comprises a pushing cylinder 101, a connecting plate 102 is mounted on an output shaft of the pushing cylinder 101, and when the pushing cylinder 101 drives the connecting plate 102 to retract, the guide rod 140 is pressed against the connecting plate 102 by the elastic piece 150. The pushing cylinder 101 pushes out the connecting plate 102, the elastic member 150 is released, the probe 120 is pushed to pop up, and the elastic member 150 drives the guide rod 140 when pushing the probe 47 due to the connection between the probe 120 and the guide rod 140.
The connecting plate 102 is provided with an elastic plate 103, and the probe 120 is closer to the product to be processed than the elastic plate 103. In this embodiment, the elastic plate is preferably a force adhesive. When data needs to be collected, the pushing cylinder 101 pushes out to drive the connecting plate 102 to move, the connecting plate 102 drives the connected elastic plate 103 to move, and the elastic plate 103 pushes the product or the workpiece to be pre-positioned.
The side edge of the connecting plate 102 is provided with a blocking table, the outer wall of the guide rod 140 is provided with a flange 141, and the flange 141 can be abutted against the blocking table. In this embodiment, the blocking table is a semicircular hole formed in a side edge of the connecting plate. The inner wall of the semicircle hole is provided with a groove to form a blocking table.
The guide rod on the displacement sensor is not influenced by the stroke of the pushing-out cylinder when measuring products or workpieces, and the pushing-out cylinder does not directly drive the displacement sensor to push out when pushing out. The force on the displacement sensor is affected by the force of the spring. When the pushing cylinder drives the connecting plate to retract, the blocking table on the connecting plate abuts against the flange of the guide rod to drive the guide rod on the displacement sensor to leave the product or the workpiece. The guide rod is abutted against the connecting plate under the influence of the elastic piece. The blocking table of the semicircular hole on the connecting plate is matched with the probe, and when the pushing cylinder pushes out to drive the displacement sensor assembly to collect data, the probe is contacted with a product or a workpiece firstly, and then the elastic plate is contacted with the product or the workpiece. In this embodiment, the probe is about 5mm higher than the spring plate, and the probe contacts the product or work piece earlier than the spring plate.
After the product of the displacement sensor assembly 100 is transferred into place, the pushing cylinder on the displacement sensor assembly 100 pushes out a predetermined position for the product. The cylinder on the displacement sensor assembly 100 pushes out the edge of the product or the workpiece which is contacted by the displacement sensor, and the coordinate value of the product or the workpiece is calculated according to the value adopted by the displacement sensor.
The invention has at least the following technical effects:
the displacement sensor adopts a contact principle, and the processor analyzes and processes acquired data of the displacement sensor to measure the position or the size of an object. The probe of the displacement sensor contacts the workpiece, the processor can calculate the distance between the sensor and the measured object, and the corresponding coordinate value of the product is calculated through the analysis of the processor.
The motion sensor is characterized by belonging to the contact type and being capable of continuously collecting data at high speed. The displacement sensor can finish 1 or more times of measurement data in product processing, and has a processor to match with the product position and data of multiple times of tests.
After the product is positioned, the displacement sensor obtains very fast response speed, and the dimensional accuracy error of the product caused by the fact that the workpiece cannot be stopped at the position due to the absolute position relation of the displacement sensor is avoided.
The displacement positioning system used by the invention consists of a group of movable mechanisms and displacement sensors, the product in-place rear cylinder drives the displacement sensors to extend out to detect the workpiece, and the relative position coordinates of the workpiece stay are accurately calculated by processing the position of the workpiece according to the absolute position relation among the mechanisms acquired by the displacement sensors through the absolute position relation of the displacement sensors due to the absolute position relation of the displacement sensors on the motion module.
It should be noted at the end of this disclosure that the above embodiments are only for illustrating the technical solution of the present invention, but not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (6)
1. A positioning system for laser cutting of products is characterized by comprising at least one pair of displacement sensing mechanisms for positioning the positions of the products and a processor, wherein signals of the displacement sensing mechanisms are connected with the processor, and each pair of displacement sensing mechanisms are positioned on opposite sides of the products;
each displacement sensing mechanism comprises a sensor component, a moving component and a jacking component, wherein the sensor component is arranged on the jacking component and can be lifted relative to the jacking component, the jacking component is arranged on the moving component and can move relative to the moving component, and the jacking component is used for driving the sensor component to contact the edge of a product to be processed;
the sensor component collects different position information of the product and sends the information to the processor, and the processor obtains the relative position information of the product after operation and analysis;
the sensor assembly comprises a bottom plate fixed on the jacking assembly, a probe, a displacement sensor, a guide rod and an elastic piece, wherein the probe, the displacement sensor, the guide rod and the elastic piece are arranged on the bottom plate;
the sensor assembly further comprises a pushing-out air cylinder, a connecting plate is arranged on an output shaft of the pushing-out air cylinder, and when the pushing-out air cylinder drives the connecting plate to retract, the guide rod is pressed by the elastic piece to abut against the connecting plate;
the moving assembly comprises a motor, a guide rail, a sliding block matched with the guide rail and a connecting block fixed on the sliding block, wherein the sliding block is arranged on an output shaft of the motor and can slide along the guide rail, and the jacking assembly is fixed on the connecting block;
the jacking assembly comprises a fixing plate fixed on the connecting block, a jacking cylinder installed on the fixing plate and a top plate fixed at the output end of the jacking cylinder, and the sensor assembly is installed on the top plate.
2. The laser cut positioning system of claim 1, comprising two pairs of said displacement sensing mechanisms, one pair of said displacement sensing mechanisms being configured to be positioned on two shorter sides of the product to be processed and the other pair of said displacement sensing mechanisms being configured to be positioned on two longer sides of the product to be processed.
3. The laser cutting positioning system of claim 1, wherein the web is provided with a spring plate, and the probe is positioned closer to the product to be processed than the spring plate.
4. The laser cutting positioning system of claim 1, wherein a blocking table is provided on a side edge of the connecting plate, and a flange is provided on an outer wall of the guide rod, and the flange can abut against the blocking table.
5. The laser cutting positioning system of claim 1, further comprising a screw rod mounted on an output shaft of the motor, a screw rod nut mounted on the screw rod, the slide block connected with the screw rod nut, the motor driving the screw rod to rotate so as to drive the slide block on the screw rod nut to move along the guide rail.
6. The laser cut positioning system of claim 1, wherein the jacking assembly further comprises a guide assembly comprising a jacking rail mounted to the fixed plate, a matched jacking slide of the jacking rail, a mounting plate secured to the jacking slide, the top plate secured to the top of the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996826.3A CN114248024B (en) | 2020-09-21 | 2020-09-21 | Positioning system for laser cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996826.3A CN114248024B (en) | 2020-09-21 | 2020-09-21 | Positioning system for laser cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114248024A CN114248024A (en) | 2022-03-29 |
| CN114248024B true CN114248024B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010996826.3A Active CN114248024B (en) | 2020-09-21 | 2020-09-21 | Positioning system for laser cutting |
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2020
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| US6539642B1 (en) * | 1999-03-03 | 2003-04-01 | Riken | Probe type shape measuring sensor, and NC processing equipment and shape measuring method using the sensor |
| CN1971209A (en) * | 2006-12-08 | 2007-05-30 | 华中科技大学 | Wide-range displacement transducer for measuring linear phase grating profile |
| EP2620825A1 (en) * | 2012-01-26 | 2013-07-31 | INNSE-BERARDI S.p.A. | Positioning system on a piece-holder table of a machine tool and method of positioning the piece on the table |
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|---|---|
| CN114248024A (en) | 2022-03-29 |
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