A kind of device for measuring length of steel tube
Technical field
The present invention relates to field of measuring technique, especially a kind of device for measuring length of steel tube, the steel pipe be applicable to before mechanical arm crawl steel pipe is surveyed long.
Background technology
Measuring motion at present for steel pipe also has a lot, and most of structure all more complicated, complex operation, what have is not suitable on square tube cutting machine.The each compression time of the spring utilized in existing measuring motion is not short, if only use a hairspring, service time is of a specified duration can increase systematic error.
In addition, existing measuring motion much adopts valuable measuring instrument, and piece price is expensive, thus improves production cost, is unfavorable for large-scale use.
In order to feed back total anglec of rotation of motor and then draw the displacement of measuring motion, motor encoder loaded onto by motor.Encoder for servo motor is mounted in a kind of sensor servomotor being used for measuring position of magnetic pole and servomotor corner and rotating speed, and easy to use, stable, precision reaches requirement substantially, is widely used in modern industry.
Summary of the invention
The object of this invention is to provide a kind of easy and simple to handle device for measuring length of steel tube being suitable for engineering reality, and can length data be imported into control system, thus control mechanical arm to the crawl position of steel pipe.
To achieve these goals, the present invention is achieved through the following technical solutions:
A kind of device for measuring length of steel tube, described measuring motion comprises long-armed support, guide rail, bracket base, push pedal, connecting box, first bar, second bar, sensor block, bulky spring, hairspring, and three proximity switches, described support is fixedly connected with connecting plate, described Bracket setting is on bracket base, described guide rail is placed on base, base is positioned in frame, move with guide rail, base is equipped with motor, it is for driving driving gear, described frame is furnished with tooth bar be meshed with said gear, when making electric machine rotation, measuring motion can move along whole stands longitudinal, the base of described long-armed support arranges an auxiliary driven gear along being parallel to guide rail direction, described driven gear is also meshed with the tooth bar that frame is arranged,
Described connecting plate is connected with push pedal, connecting box, described push pedal is advanced for promoting steel pipe, first bar and the second bar are arranged in described connecting box, described first bar is equipped with bulky spring, hairspring, connected by bloom in the middle of described bulky spring, hairspring, both ends of the spring blocks with block, inner sleeve respectively, and described sensor block is arranged on the second bar, and three described proximity switches are fixed on described connecting box successively side by side.
When wherein the 3rd proximity switch encounters sensor block, signal can pass to control system, thus feeds back to motor and make decelerating through motor, slowly advances, until the second proximity switch encounters sensor block, and motor stalling.
Support in the present invention is rely on gear-rack drive along the movement in guide rail direction, and the engagement of single gear drives and easily causes support motion unstable.All only adopted single gear to engage with linear gear rack in the past to drive, require very high for guide rail like this, not high easily the causing during support-moving of guide precision is blocked on guide rail, very large to the wearing and tearing of guide rail, affects service life.The present invention to be engaged with tooth bar by driven by motor master gear and drives, and installs an equipment gear in addition along guide rail direction, engages simultaneously, thus makes measuring motion stable, effectively can improve precision with tooth bar.
The measuring motion structure that invention adopts is simple, with low cost, adopts the encoder of motor just can calculate steel pipe length.Three proximity switches make--measurement--protection integration of slowing down, and all parts price of whole measuring motion is all very cheap, is suitable for very much engineering reality, for practical in production in enormous quantities.Motor driven gear, then transmit power by rack-and-pinion, make measuring motion be applicable to long tube and measure.This device for measuring length of steel tube, is also not quite similar according to pipe range difference to the decrement of preloading spring when gage outfit contact pipe end.Steel pipe survey long after data are passed to mechanical arm, with the crawl position for different steel pipe length determination mechanical arms, thus ensure the stability that laser cutting machine cuts steel pipe and precision.Adopt the device for measuring length of steel tube of above technical scheme, structure is simple, and easy to use, price is cheap, and life cycle is long.Use three proximity switches, not only can measure steel pipe length, and can buffer protection function be played.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic perspective view of square tube laser cutting machine pipe range measuring motion of the present invention;
Fig. 2 is the overall structure schematic diagram of square tube laser cutting machine pipe range measuring motion of the present invention;
Fig. 3 is the cross sectional representation of measuring motion along connecting plate direction.
In all the drawings, identical Reference numeral is used for representing identical element or structure, wherein, 1-long-armed support 2-connecting plate 3-connecting box 4-push pedal 5-baffle plate 6-overcoat bucket 7-inner sleeve 8-firm block 9-block 10-sensor block 11-first bar 12-second bar 13-cover plate 14-bulky spring 15-hairspring 16-nut 17-motor 18-driving gear 19-driven gear 20-guide rail 21-first proximity switch 22-second proximity switch 23-the 3rd proximity switch
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As Figure 1-3, measuring motion of the present invention mainly comprises guide rail 20, base, long-armed support 1, push pedal 4, connecting box 3, first bar 11, second bar 12, sensor block 10, bulky spring 14, hairspring 15, three proximity switch 21-23.Long-armed support 1 is fixedly connected with connecting plate 2, described guide rail 20 is placed on base, long-armed support 1 is arranged on base, base is positioned in frame, move with base rail 20, base is equipped with motor 17, it is for driven wheel 18, described frame is furnished with tooth bar be meshed with said gear, when motor 18 is rotated, measuring motion can be mobile along whole stands longitudinal (long-armed bracket base guide rail 20 direction).The base of long-armed support 1 arranging an auxiliary driven gear 19 along being parallel to guide rail 20 direction, ensureing the stability run like this.
Connecting plate 2 is connected with push pedal 4, connecting box 3, the first bar 11 and the second bar 12 are contained in connecting box 3, first bar 11 is equipped with thickness two preloading springs, centre is connected by bloom 8, and both ends of the spring blocks with block 9, inner sleeve 7 respectively, uses inner sleeve 7 effectively can fix spring.Sensor block 10 is arranged on the second bar 12, and three described proximity switches are fixed on connecting box 3 successively side by side.
The course of work of the present invention is: long-armed support 1 drives whole measuring motion to move towards the direction of steel pipe under the driving of motor 17, until the top steel pipe of push pedal 4 promote steel pipe and move towards the casing outside plate of square tube cutting machine away from measuring motion one end.When after the top casing outside plate of the steel pipe other end, first bar 11, second bar 12 and be fixed on sensor block 10 on the second bar 12 along with steel pipe and stop travelling forward, now under the driving of motor 17, connecting box 3 and proximity switch fixed thereon also continue towards steel pipe movement, now start to compress preloading spring 14,15, proximity switch moves towards sensor block 10, when the 3rd proximity switch 23 encounters sensor block 10, signal can pass to control system, thus feed back to motor motor 17 is slowed down, slowly advance.Until the second proximity switch 22 encounters sensor block 10, motor 17 stall.Now can obtain by the encoder of motor the distance that long-armed support 1 moves forward, determine during origin position due to long-armed support 1, the distance of the casing outside plate that origin position distance steel pipe withstands is determined, thus system can calculate the length of steel pipe, and pass the length data of steel pipe back control section, control three mechanical arms to the crawl position of steel pipe.By the decelerating effect of the 3rd proximity switch 23, the measurement effect of the second proximity switch 22, the protective effect of the first proximity switch 21, thus realize subtract-measure-protect integration.
In sum, good stability simple, cheap, applied widely according to device for measuring length of steel tube structure of the present invention.This survey long structure is applicable to once and again using for a long time, and just can calculate steel pipe length by motor encoder, may be used in a lot of pipe fitting process equipment.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.