CN109759347B

CN109759347B - Automatic measuring machine for external diameter of piston pin

Info

Publication number: CN109759347B
Application number: CN201910194676.1A
Authority: CN
Inventors: 张明乾; 廖建光
Original assignee: Pinghu Zhongjing Measurement And Control Technology Co ltd
Current assignee: Pinghu Zhongjing Measurement And Control Technology Co ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2021-05-28
Anticipated expiration: 2039-03-14
Also published as: CN109759347A

Abstract

The invention discloses an automatic measuring machine for the outer diameter of a piston pin, which relates to the technical field of piston pin measuring equipment and aims to solve the problem of low detection efficiency, and the technical scheme is as follows: the utility model provides a piston pin external diameter automatic measuring machine, includes the base, is used for adorning piston pin's charging tray, with charging tray assorted automatic feeding frame, changes the material track, sliding connection in change the orbital commentaries on classics material platform of expecting, be used for snatching piston pin's intelligence and snatch mechanism, pneumatic measurement appearance and automatic classification device, change the material platform and pass in and out the bottom of automatic feeding frame through changing the orbital commentaries on classics of expecting, the material platform of changeing is connected with the driver, pneumatic measurement appearance includes the gauge head, the gauge head is provided with ejection mechanism, intelligence snatchs the mechanism and is used for snatching the piston pin in the charging tray and places in the gauge head, automatic feeding frame, intelligence snatch the mechanism, pneumatic measurement appearance, automatic classification device. The automatic measuring machine for the outer diameter of the piston pin can improve the overall detection efficiency of the piston pin.

Description

Automatic measuring machine for external diameter of piston pin

Technical Field

The invention relates to the technical field of piston pin measuring equipment, in particular to an automatic measuring machine for the outer diameter of a piston pin.

Background

The wrist pin is a cylindrical pin mounted on the skirt of the piston. The middle part of the connecting rod passes through a small end hole of the connecting rod and is used for connecting the piston and the connecting rod, and the function of the connecting rod is to transmit the gas acting force borne by the piston to the connecting rod or to enable the small end of the connecting rod to drive the piston to move together. To reduce weight, piston pins are typically made of high quality alloy steel and are hollow. The outer diameter size and the precision of the piston pin are one of the decisive factors influencing the performance, so that the piston pin must be strictly and completely inspected in the production of the piston pin.

Because piston pins are large in production batch, easy to wear and low in selling price, most piston pin production enterprises in China adopt a mode of manually utilizing a torsion spring instrument to sample and detect the piston pins, but the detection efficiency is extremely low, the detection quality of products cannot be guaranteed, and the piston pin production enterprises are in danger of low-end competition in the international market; in particular, in recent years, outsiders generally put forward the requirement of 100% detection, which forces many enterprises to urgently increase the outer diameter measuring equipment with high detection efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic measuring machine for the outer diameter of a piston pin, so as to improve the overall detection efficiency of the piston pin.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a piston pin external diameter automatic measuring machine, includes the base, is used for adorning piston pin's charging tray, with charging tray assorted automatic feeding frame, changes the material track, sliding connection in change the orbital commentaries on classics material platform of expecting, be used for snatching piston pin's intelligence and snatch mechanism, pneumatic measurement appearance and automatic classification device, change the material platform and pass in and out the bottom of automatic feeding frame through changing the orbital commentaries on classics of expecting, the material platform of changeing is connected with the driver, pneumatic measurement appearance includes the gauge head, the gauge head is provided with ejection mechanism, intelligence snatchs the mechanism and is used for snatching the piston pin in the charging tray and places in the gauge head, automatic feeding frame, intelligence snatch the mechanism, pneumatic measurement appearance, automatic classification device.

Through adopting above-mentioned technical scheme, fill the piston pin of awaiting measuring in the charging tray, and with a plurality of charging trays heap put into automatic material loading frame, material loading tray dish in with automatic material loading frame shifts to intelligence through the commentaries on classics material platform that slides on changeing the material track and snatchs the region of snatching of mechanism, then snatch the piston pin that the mechanism snatched in the charging tray and place in the gauge head of pneumatic measurement appearance and carry out the external diameter and detect through intelligence, ejection mechanism is ejecting from the gauge head with the piston pin after finishing detecting, and with detect signal transmission to controller, then the piston pin that controller control automatic classification device will finish detecting has carried out automatic classification, on the one hand has improved the efficiency that big batch piston pin external diameter detected greatly, on the other hand has also guaranteed the quality of the piston pin that produces.

The invention is further configured to: the automatic feeding frame comprises a rest frame matched with the material discs and a clamping device for clamping the material discs, the clamping device is electrically connected with and controlled by the controller, and when the material transferring table is positioned at the bottom of the rest frame, the height of the upper surface of the material transferring table and the bottom surface of the material disc at the bottommost part in the rest frame is equal to the thickness of the material discs.

By adopting the technical scheme, when the piston pin outer diameter automatic measuring machine is used for measuring the outer diameters of a batch of piston pins, only a tray filled with piston pins is required to be stacked in the placing frame, the holding device in the placing frame holds and fixes the tray in the placing frame, when the material transferring platform enters the material loading area at the bottom of the placing frame through the material transferring track, the controller controls the holding device to release the holding of the tray, so that the tray falls down on the material transferring platform at the bottom of the placing frame, because the height between the upper surface of the material transferring platform and the bottom surface of the tray at the bottommost in the placing frame is equal to the thickness of the tray, the tray can only fall down one, the controller controls the holding device to clamp and clamp the tray in the clamping way again, the tray in the placing frame is clamped and fixed again, the piston pin tray filled with the piston pins is automatically transferred out through the material transferring platform, the operation workers are not required to continuously carry out the batch charging on the station, and the constraint on, meanwhile, the detection efficiency of the piston pin is greatly improved.

The invention is further configured to: the clamping device comprises two electric cylinders oppositely arranged on two sides of the placement frame and clamping blocks fixed at free ends of the electric cylinders, and clamping grooves matched with the clamping blocks are formed in two side faces of the material tray.

By adopting the technical scheme, when the material tray in the rest stand is clamped, the controller controls the electric cylinder to push inwards, so that the clamping block fixed at the free end of the electric cylinder is clamped into the clamping groove formed in the side surface of the material tray, the material tray is clamped and supported in the rest stand, and the structure is simple.

The invention is further configured to: the intelligent grabbing mechanism comprises a visual identification device in signal connection with the controller and a double-shaft manipulator for grabbing the piston pin, the double-shaft manipulator is electrically connected with and controlled by the controller, and the piston pin in the material plate is subjected to foolproof positioning through the visual identification device, so that the controller controls the double-shaft manipulator to accurately grab the piston pin; when the vision recognition device recognizes that the piston pins in one transverse row in the material tray are completely grabbed, the controller controls the driver to advance by one unit, wherein one unit is equal to the distance from the piston pins in the next row.

Through adopting above-mentioned technical scheme, when carrying out the external diameter measurement to the piston pin, need not to operate in the manual check out test set of putting into one by one of workman, prevent slow-witted location through the piston pin in the material loading tray of visual identification device to the material loading platform, thereby the accurate snatching of each piston pin in the material loading tray of accomplishing of controller control biax manipulator, and when the horizontal piston pin of a line was snatched when finishing in the material loading tray was discerned to visual identification device, controller control driver will change the material loading platform (change the material loading tray on the material loading platform) and impel a unit, a unit equals the distance to next piston pin (impel the position of next piston pin promptly), thereby reach the purpose of automatic snatching and putting into check out test set, the measurement of piston pin external diameter has been.

The invention is further configured to: the double-shaft manipulator comprises a driving mechanism and an executing mechanism which are electrically connected with the controller, the executing mechanism comprises a fixing seat, an adsorption head vertically connected to the fixing seat and an air suction pipe connected to the adsorption head, the adsorption head is matched with a piston pin, and the air suction pipe is connected with an air suction device.

Through adopting above-mentioned technical scheme, because the piston pin is hollow form, there is a through-hole in the middle of promptly, the clamp of getting the formula manipulator with old-fashioned more changes for absorption formula, more is applicable to snatching of piston pin, and the piston pin is covered with in the charging tray side by side, adopts absorption formula to make to snatch more accurate.

The invention is further configured to: the vertical slip of absorption head is connected in the fixing base, the absorption headgear is equipped with the pressure spring, pressure spring one end butt in fixing base, other end butt on the absorption head.

Through adopting above-mentioned technical scheme, when snatching the piston pin in the charging tray, at the stopper that contacts the piston pin, because the elastic action of pressure spring has avoided the stopper to bump hard contact with the piston pin firmly, has given certain cushioning effect to prevent to cause the damage to piston pin and stopper.

The invention is further configured to: the automatic classification device comprises a defective product conveying device, a non-defective product conveying device and a mechanical claw used for clamping and taking piston pins, wherein the defective product conveying device, the non-defective product conveying device and the mechanical claw are respectively connected with a controller, the controller is preset with a first preset value and a fourth preset value which are sequentially increased, a detection signal is sent to the controller when the pneumatic measuring instrument finishes measuring, the controller receives the detection signal and compares the detection signal with the first preset value and the fourth preset value, and when the detection signal is smaller than the first preset value or larger than the fourth preset value, the controller controls the mechanical claw to clamp and take the piston pins in the measuring head and send the piston pins into the defective product conveying device; and when the detection signal is greater than the first preset value and less than a fourth preset value, the controller controls the mechanical claw to clamp the piston pin in the measuring head and send the piston pin into the good product conveying device.

By adopting the technical scheme, when the piston pins are subjected to external diameter measurement in batches, the piston pins to be measured are filled in the material trays, the material trays are stacked in the automatic material feeding rack, the material trays in the automatic material feeding rack are transferred to the grabbing area of the intelligent grabbing mechanism in a disc mode through the material transferring platform sliding on the material transferring track, then the piston pins in the material trays are grabbed by the intelligent grabbing mechanism and placed in a measuring head of the pneumatic measuring instrument for external diameter detection, the piston pins are ejected out of the measuring head by the ejecting mechanism after the detection is finished, the detection signals are sent to the controller, the controller compares the detection signals with a first preset value and a fourth preset value, when the detection signals are smaller than the first preset value or larger than the fourth preset value, the controller controls the mechanical claw to clamp the piston pins in the measuring head and send the piston pins into the defective product conveying device, and when the detection signals are larger than the first preset value and smaller than the, then the controller control gripper gets the piston pin clamp in with the gauge head and sends into yields conveyer to the piston pin that will detect through automatic classification device and finish has carried out automatic classification, has improved the efficiency that big batch piston pin external diameter detected on the one hand greatly, and on the other hand has also guaranteed the quality of the piston pin of producing equally.

The invention is further configured to: the controller is also preset with a second preset value and a third preset value, the first preset value, the second preset value, the third preset value and the fourth preset value are sequentially increased, the good product conveying device is divided into a first good product line, a second good product line and a third good product line, and when a detection signal is larger than the first preset value and smaller than the second preset value, the controller controls the mechanical claw to clamp and convey the piston pin in the measuring head into the first good product line; when the detection signal is larger than a second preset value and smaller than a third preset value, the controller controls the mechanical claw to clamp the piston pin in the measuring head and send the piston pin into a second good product line; and when the detection signal is greater than a third preset value and less than a fourth preset value, the controller controls the mechanical claw to clamp the piston pin in the measuring head and send the piston pin into a third good product line.

By adopting the technical scheme, the piston pins detected as good products are also divided into several grades, namely the piston pins with different specifications have the outer diameter difference of 1 mu m, however, if the piston pins with different specifications are to be sorted out from all the piston pins in good products, the sorting is quite complicated; therefore, the good product conveying device is divided into a first good product line, a second good product line and a third good product line, a first preset value, a second preset value, a third preset value and a fourth preset value which are increased in sequence are preset in the controller, and when a detection signal is larger than the first preset value and smaller than the second preset value, the controller controls the mechanical claw to clamp and send a piston pin in the measuring head into the first good product line; when the detection signal is larger than a second preset value and smaller than a third preset value, the controller controls the mechanical claw to clamp the piston pin in the measuring head and send the piston pin into a second good product line; when the detection signal is larger than a third preset value and smaller than a fourth preset value, the controller controls the mechanical claw to clamp the piston pin in the measuring head and send the piston pin into a third qualified product line, so that the qualified piston pins can be automatically distinguished from all specifications, the production efficiency is further improved, and the quality of the piston pins is guaranteed.

The invention is further configured to: the automatic material transferring platform is characterized by further comprising an automatic empty tray recycling frame, the automatic empty tray recycling frame is located at the other end of the material transferring track, the material transferring platform enters and exits the bottom of the automatic empty tray recycling frame through the material transferring track, and after the piston pins in the material trays are completely grabbed by the intelligent grabbing mechanism, the controller controls the driver to drive the material transferring platform to the bottom of the automatic empty tray recycling frame.

Through adopting above-mentioned technical scheme, in carrying out piston pin external diameter testing process, fill the piston pin in the charging tray, and put into automatic feeding frame with the charging tray heap, controller control driver drive changes the material platform and slides on changeing the material track, change the material platform by sliding on changeing the material track and will automatically feed the charging tray switching in the material rack to the intelligence snatch the snatching region of mechanism, after the piston pin in the charging tray is snatched and finishes, controller control driver drive changes the material platform and carries out the recovery of empty charging tray to empty automatic recovery frame bottom of retrieving of dish, realize the automatic recovery of empty charging tray, operation workman's work load has been alleviateed, the holistic detection efficiency of piston pin has more been improved greatly.

The invention is further configured to: the automatic empty tray recycling frame comprises an empty tray frame, a clamping turnover plate, a lifting cylinder and a proximity sensor, wherein the clamping turnover plate, the lifting cylinder and the proximity sensor are connected to two sides of the empty tray frame in an upward turnover mode in a rotating mode and are connected to the controller in a signal mode, the lifting cylinder is vertically fixed on a base located at the bottom of the empty tray frame, the proximity sensor is installed at the other end of a material rotating track and faces a material rotating table, when the material rotating table enters the bottom of the empty tray frame, the proximity sensor is triggered, and the controller controls the lifting cylinder to be pushed upwards so as to lift a tray to a turnover.

Through adopting above-mentioned technical scheme, when driver drive commentaries on classics material platform got into empty pan frame bottom, proximity sensor is triggered, thereby controller control lifting cylinder upwards impels, the free end of lifting cylinder is holding in the palm empty charging tray and is up lifting in empty pan frame bottom, empty charging tray is the horizontally joint with normal condition in the lifting process and turns over board jack-up to turning over upwards, the joint turns over the board and turns over a 90 degrees that upwards turns over this moment, thereby empty charging tray continues to lift and is up to being higher than the height after turning over the book of joint and turning over the board, the joint turns over the board and no longer receives the low grade of charging tray this moment, drop to the horizontally joint state through self weight, the free end of controller control lifting cylinder is withdrawed, thereby empty charging tray just is turned over the board joint by the joint that is the horizontality and has been in empty pan.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the material tray is only required to be stacked and clamped in the placing frame, and the controller controls the clamping device to release the clamping of the material tray when the material is discharged, so that the material tray falls onto the material transferring table at the bottom of the placing frame, the material tray filled with the piston pin is automatically transferred out through the material transferring table, an operator does not need to continuously charge on a station, and the constraint on the operator is reduced;

2. the piston pins in the charging tray on the material loading platform are positioned in a foolproof manner through the visual identification device, so that the controller controls the double-shaft manipulator to accurately complete the grabbing of each piston pin in the charging tray, the purposes of automatically grabbing and placing in a detection device are achieved, and the measuring efficiency of the outer diameter of the piston pins is greatly improved;

3. after the detection is finished, the controller compares the detection signal with a first preset value and a fourth preset value, and the controller controls the mechanical claw to clamp the piston pins in the measuring head and send the piston pins into a defective product conveying device or a non-defective product conveying device according to the comparison result, so that the piston pins after the detection are automatically classified, on one hand, the efficiency of detecting the outer diameters of the piston pins in batches is greatly improved, and on the other hand, the quality of the piston pins produced is also ensured;

4. after piston pins in the material disc are grabbed and finished, the controller controls the driver to drive the material transferring platform to the bottom of the empty disc automatic recovery frame to recover empty material discs, so that the empty material discs are automatically recovered, the workload of operators is reduced, and the overall detection efficiency of the piston pins is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged schematic view at a in fig. 1, mainly showing the structure of the automatic feeding frame;

FIG. 3 is a schematic view of the tray configuration of the present invention;

FIG. 4 is a schematic view of a dual axis robot configuration of the present invention;

FIG. 5 is a schematic view of a pneumatic gauge of the present invention;

FIG. 6 is a schematic view of the automatic sorting apparatus of the present invention;

fig. 7 is a schematic structural view of an automatic empty tray recycling bin according to the present invention.

In the figure, 1, a base; 2. a material tray; 211. a card slot; 3. an automatic feeding frame; 31. a shelf; 32. a clamping device; 321. an electric cylinder; 322. a clamping block; 323. a butting post; 324. a base; 4. transferring the material rail; 5. a material transferring platform; 6. an intelligent grabbing mechanism; 61. a visual recognition device; 62. a double-shaft manipulator; 6211. a rodless cylinder; 6212. a vertical drive; 622. an actuator; 6221. a fixed seat; 6222. an adsorption head; 6223. an air intake duct; 7. a pneumatic gauge; 71. a measuring head; 8. an automatic sorting device; 81. a defective product conveying device; 82. a good product conveying device; 821. a first good product line; 822. a second good product line; 823. a third good product line; 83. a gripper; 9. a driver; 10. an ejection mechanism; 11. a controller; 12. an overhead sensor; 13. an alarm; 14. a limiting block; 15. a cushion pad; 16. a suction device; 17. a pressure spring; 18. a buffer ring; 19. fixing the bolt; 20. a rubber pad; 21. a gear lever; 22. fixing the rod; 231. a first start sensor; 232. a second start sensor; 24. an empty tray automatic recovery frame; 241. an empty tray frame; 242. clamping the turning plate; 243. a lifting cylinder; 244. a proximity sensor; 25. a non-slip mat; 26. a butting block; 27. a full shelf sensor; 28. an alarm.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, 4, 5 and 6, the automatic piston pin outer diameter measuring machine disclosed by the invention comprises a base 1, a material tray 2 for loading piston pins, an automatic material loading frame 3 matched with the material tray 2, a material transferring rail 4, a material transferring table 5 connected to the material transferring rail 4 in a sliding manner, an intelligent grabbing mechanism 6 for grabbing piston pins, a pneumatic measuring instrument 7 and an automatic sorting device 8, wherein the automatic material loading frame 3 is positioned at one end of the material transferring rail 4, the material transferring table 5 enters and exits from the bottom of the automatic material loading frame 3 through the material transferring rail 4, the material transferring table 5 is connected with a driver 9, the driver 9 is a rodless cylinder installed on the material transferring rail 4, the pneumatic measuring instrument 7 comprises a measuring head 71 matched with the piston pins, an ejection mechanism 10 is installed below the measuring head 71, the ejection mechanism 10 is a cylinder vertically installed in the base 1, the intelligent grabbing mechanism 6 is used for grabbing piston pins in the material tray 2 and placing the measuring head 71, automatic go up work or material rest 3, intelligent snatch mechanism 6, pneumatic measurement appearance 7, automatic classification device 8, driver 9 and ejection mechanism 10 and be connected with controller 11, and controller 11 is placed in base 1, and controller 11 is the PLC controller.

When carrying out external diameter measurement in batches to the piston pin, fill measuring in charging tray 2 with the piston pin of awaiting measuring, and stack into automatic material loading frame 3 with a plurality of charging

trays

2, 2 pans of charging tray in automatic material loading frame 3 are shifted to the intelligence and are snatched the region of snatching of mechanism 6 through material platform 5 that changes that slides on material track 4 changes, then snatch mechanism 6 through the intelligence and snatch the piston pin in charging tray 2 and place and carry out external diameter detection in gauge head 71 of pneumatic measuring instrument 7, ejection mechanism 10 is ejecting from measuring head 71 with the piston pin after finishing detecting, and with detected signal transmission to controller 11, then controller 11 control automatic classification device 8 has carried out automatic classification with the piston pin that finishes detecting, on the one hand has improved the efficiency that big external diameter detected in batches greatly, on the other hand has also guaranteed the quality of the piston pin of producing equally.

In this embodiment, referring to fig. 2, the automatic feeding frame 3 includes a rest 31 matched with the tray 2 and a holding device 32 for holding the tray 2, the holding device 32 is electrically connected to and controlled by the controller 11, and when the material transferring table 5 is located at the bottom of the rest 31, the height between the upper surface of the material transferring table 5 and the bottom surface of the bottommost tray 2 in the rest 31 is equal to the thickness of the tray 2. When the piston pin outer diameter automatic measuring machine is used for measuring the outer diameters of a batch of piston pins, as long as a tray 2 filled with piston pins is stacked in the placing frame 31, the clamping device 32 in the placing frame 31 clamps and fixes the tray 2 in the placing frame 31, when the material transferring platform 5 enters the material loading area at the bottom of the placing frame 31 through the material transferring track 4, the controller 11 controls the clamping device 32 to release the clamping on the tray 2, so that the tray 2 falls on the material transferring platform 5 at the bottom of the placing frame 31, as the height between the upper surface of the material transferring platform 5 and the bottom surface of the bottommost tray 2 in the placing frame 31 is equal to the thickness of the tray 2, the tray 2 can only fall one, at the moment, the controller 11 controls the clamping device 32 to clamp and clamp the material, the tray 2 in the placing frame 31 is clamped and fixed again, the piston pin automatically transfers the full tray 2 out through the material transferring platform 5, and an operator does not need to continuously charge on a station, the constraint on operators is reduced, and meanwhile, the detection efficiency of the piston pin is greatly improved.

In this embodiment, referring to fig. 2 and 3, the clamping device 32 includes two electric cylinders 321 oppositely disposed on two sides of the rest rack 31 and a clamping block 322 fixed at a free end of the electric cylinders 321, and two side surfaces of the tray 2 are both provided with clamping grooves 211 matched with the clamping blocks 322. When the tray 2 in the shelf 31 is clamped, the controller 11 controls the electric cylinder 321 to push inwards, so that the clamping block 322 fixed at the free end of the electric cylinder 321 is clamped into the clamping groove 211 formed in the side surface of the tray 2, and the tray 2 is clamped and held in the shelf 31, and the structure is simple.

In order to more stably clamp the tray 2, referring to fig. 2, the upper end surface of the clamping block 322 is fixed with an abutting column 323 facing the tray 2, and when the clamping block 322 is clamped in the clamping groove 211, the abutting column 323 abuts against the side of the tray 2. In the draw-in groove 211 that the joint piece 322 joint got into charging tray 2 in order to the charging tray 2 centre gripping, set up butt post 323 in order to carry out the butt to charging tray 2 avris to further carry out the centre gripping to charging tray 2, make charging tray 2 by the more firm of centre gripping in shelf 31.

For the clamping block 322 to slide more stably, referring to fig. 2, the lower end surface of the clamping block 322 is connected with a base 324 in a sliding manner, the electric cylinder 321 is fixed on the base 324, and the base 324 is fixed on the base 1 in a welding manner. Make more stable when electric jar 321 promotes joint piece 322 to and make joint piece 322 more firm when the centre gripping holds and holds charging tray 2, increased joint piece 322's steadiness.

The rack with the full material tray is empty, if an operator is busy with other matters at that time, the overall detection efficiency of the piston pin measurement is influenced, in order to improve the overall detection efficiency, referring to fig. 1 and 2, an empty rack sensor 12 for detecting the material tray 2 is installed on a base 1 below the rack 31, the empty rack sensor 12 is in signal connection with a controller 11, the controller 11 is also connected with an alarm 13, when no material tray 2 exists in the rack 31, the empty rack sensor 12 is triggered, and the controller 11 controls the alarm 13 to send an alarm signal; when the number of the material trays 2 in the rest rack 31 is less than the preset number, the empty rack sensor 12 is triggered to send an empty rack detection signal to the controller 11, and the controller 11 controls the alarm 13 to send an alarm signal to remind an operator that the material trays 2 are added into the rest rack 31, so that the overall detection efficiency of the piston pin is prevented from being influenced.

Meanwhile, referring to fig. 1, two end parts of the material transferring track 4 are provided with limiting blocks 14; so as to prevent the material transferring platform 5 from being out of control to rush out the material transferring track 4 and improve the production safety. A buffer pad 15 is stuck on the upper surface of the material transferring table 5; when the tray 2 in the shelf 31 falls down onto the transfer table 5, the buffer pads 15 give the tray 2 a certain buffer effect to prevent the tray 2 from deviating due to upward bounce or vibration caused by hard force.

In order to further improve the overall detection efficiency, in this embodiment, referring to fig. 1 and fig. 4, the intelligent grasping mechanism 6 includes a visual recognition device 61 in signal connection with the controller 11 and a dual-axis manipulator 62 for grasping piston pins, where the visual recognition device 61 is a CCD camera, the dual-axis manipulator 62 is electrically connected with and controlled by the controller 11, and the piston pins in the material tray 2 are positioned by the visual recognition device 61 in a foolproof manner, so that the controller 11 controls the dual-axis manipulator 62 to accurately grasp the piston pins, and when the visual recognition device 61 recognizes that grasping of one transverse row of piston pins in the material tray 2 is completed, the controller 11 controls the driver 9 to advance by one unit, and one unit is equal to the distance to the next row of piston pins. When carrying out external diameter measurement to the piston pin, need not in the manual check out test set of putting into one by one of operation workman, prevent slow-witted location through vision recognition device 61 to the piston pin in the charging tray 2 on the material platform 5, thereby the accurate snatching of each piston pin in the charging tray 2 of accomplishing of controller 11 control biax manipulator 62, and when vision recognition device 61 discerned in the charging tray 2 horizontal a line piston pin snatchs and finishes, controller 11 control driver 9 will change material platform 5 (change charging tray 2 on the material platform 5) and impel a unit, a unit equals the distance to next line piston pin (impel the position of next line piston pin promptly), thereby reach the purpose of automatic snatching and putting into gauge head 71, the efficiency of measurement of piston pin external diameter has been improved greatly.

In order to improve the grasping accuracy of the piston pin, referring to fig. 1 and 4, the two-axis manipulator 62 includes a driving mechanism electrically connected to the controller 11 and an actuator 622, the actuator 622 includes a fixed seat 6221, an adsorption head 6222 vertically connected to the fixed seat 6221, and an air suction pipe 6223 connected to the adsorption head 6222, the adsorption head 6222 is matched with the piston pin, and the air suction pipe 6223 is connected to the air suction device 16. Because the piston pin is hollow form, has a through-hole in the middle of promptly, changes the formula manipulator of getting of old-fashioned clamp for absorption formula, more is applicable to snatching of piston pin, and the piston pin is covered with in the charging tray side by side, adopts absorption formula to make to snatch more accurate.

In order to avoid the damage of the adsorption head 6222, referring to fig. 4, the adsorption head 6222 is vertically slidably connected to the fixed seat 6221, the adsorption head 6222 is sleeved with a pressure spring 17, one end of the pressure spring 17 abuts against the fixed seat 6221, and the other end abuts against the adsorption head 6222; when snatching the piston pin in charging tray 2, at the same time that adsorption head 6222 contacted the piston pin, because the elastic action of pressure spring 17, avoided adsorption head 6222 and piston pin to bump hard contact hard, given certain cushioning effect to prevent to cause the damage to piston pin and adsorption head 6222.

Referring to fig. 4, a buffer ring 18 is fixed at the lower end of the adsorption head 6222 close to the adsorption port, and the other end of the pressure spring 17 abuts against the buffer ring 18; when the adsorption head 6222 receives a large impact, the adsorption head 6222 can be retracted upwards due to the existence of the pressure spring 17, and the buffer ring 18 is arranged, so that the adsorption head 6222 is collided with the fixed seat 6221 instead of the adsorption head 6222 by the buffer ring 18 when being retracted upwards, and the adsorption head 6222 is prevented from being damaged.

In addition, in order to facilitate replacement and maintenance of the adsorption head 6222, referring to fig. 4, a fixing bolt 19 is screwed to the upper end of the adsorption head 6222, a rubber pad 20 is arranged on the fixing bolt 19 in a penetrating manner, and the cross section of the rubber pad 20 is larger than that of the sliding connection part of the adsorption head 6222. The rubber pad is arranged in the fixing bolt in a penetrating way and is fixed at the upper end part of the adsorption head along with the fixing bolt, so that the adsorption head is prevented from falling off the fixing seat through the rubber pad, and the adsorption head reduces the damage of the fixing bolt under the action of the pressure spring; and a fixing bolt is arranged to facilitate replacement and maintenance of the adsorption head.

Referring to fig. 4, the driving mechanism comprises a transverse rodless cylinder 6211 and a vertical driver 6212 slidably connected to the rodless cylinder 6211, and the fixed seat 6221 is slidably connected to the vertical driver 6212; the rodless cylinder 6211 drives the fixed seat 6221 fixedly connected to the free end of the vertical driver 6212 to move left and right, so that the material tray 2 absorbs the piston pin or the piston pin is put down by the measuring head 71; the vertical driver 6212 drives the fixed seat 6221 to move up and down so as to adsorb the piston pin.

The ejection mechanism 10 is linked with the air gauge 7, the ejection mechanism 10 is arranged at the bottom of the measuring head 71, and when the air gauge 7 finishes detecting the outer diameter, the controller 11 controls the ejection mechanism 10 to eject the upper end of the piston pin out of the upper end face of the measuring head 71.

In the present embodiment, referring to fig. 1 and 6, the automatic sorting device 8 includes a defective product conveying device 81, a good product conveying device 82, and a gripper 83 for gripping a piston pin, which are respectively connected to the controller 11, wherein the defective product conveying device 81 and the good product conveying device 82 are both conventional conveying devices, and therefore, a first predetermined value and a fourth predetermined value which are sequentially increased are preset in the controller 11, when the pneumatic gauge 7 finishes measuring, a detection signal is sent to the controller 11, the controller 11 receives the detection signal and compares the detection signal with the first predetermined value and the fourth predetermined value, and when the detection signal is smaller than the first predetermined value or larger than the fourth predetermined value, the controller 11 controls the gripper 83 to grip the piston pin in the measuring head 71 and send the piston pin to the defective product conveying device 81; when the detection signal is greater than the first predetermined value and less than the fourth predetermined value, the controller 11 controls the gripper 83 to pick up the piston pin inside the probe 71 and send the piston pin to the good product conveyor 82.

When the piston pins are subjected to external diameter measurement in batches, filling piston pins to be measured in the material trays 2, stacking a plurality of material trays 2 into the automatic material feeding rack 3, transferring the material trays 2 in the automatic material feeding rack 3 to a grabbing area of the intelligent grabbing mechanism 6 by the material transferring platform 5 sliding on the material transferring track 4, grabbing the piston pins in the material trays 2 by the intelligent grabbing mechanism 6 and placing the piston pins in the measuring head 71 of the air-measuring instrument 7 for external diameter detection, after the detection is finished, the piston pins are jacked out of the measuring head 71 by the jacking mechanism 10, and detection signals are sent to the controller 11, the controller 11 compares the detection signals with a first preset value and a fourth preset value, when the detection signals are smaller than the first preset value or larger than the fourth preset value, the controller 11 controls the mechanical claw 83 to clamp the piston pins in the measuring head 71 and send the piston pins into the defective product conveying device 81, and when the detection signals are larger than the first preset value and smaller than the fourth preset value, the controller 11 controls the mechanical claw 83 to clamp the piston pins in the measuring head 71 and send the piston pins into the good product conveying device 82, so that the piston pins which are detected completely are automatically classified through the automatic classification device 8, on one hand, the efficiency of large-batch piston pin outer diameter detection is greatly improved, and on the other hand, the quality of the produced piston pins is also guaranteed.

The piston pins detected as good products are also divided into a plurality of grades, namely piston pins with different specifications are provided, the difference of the outer diameters of the piston pins with different specifications is 1 mu m, however, if the piston pins with different specifications are to be picked from all the piston pins detected as good products, the picking is quite tedious; referring to fig. 1 and 6, a second predetermined value and a third predetermined value are preset in the controller 11, the first predetermined value, the second predetermined value, the third predetermined value and the fourth predetermined value are sequentially increased, the good product conveying device 82 is divided into a first good product line 821, a second good product line 822 and a third good product line 823, and when the detection signal is greater than the first predetermined value and smaller than the second predetermined value, the controller 11 controls the gripper 83 to grip and feed the piston pin in the probe 71 to the first good product line 821; when the detection signal is greater than the second predetermined value and less than the third predetermined value, the controller 11 controls the gripper 83 to grip the piston pin in the probe 71 and send the piston pin to the second non-defective product line 822; when the detection signal is greater than the third predetermined value and less than the fourth predetermined value, the controller 11 controls the gripper 83 to grip the piston pin in the measuring head 71 and send the piston pin into the third good product line 823; therefore, piston pins in good products can be automatically distinguished from various specifications, the production efficiency is further improved, and the quality of the piston pins is guaranteed.

In this embodiment, referring to fig. 6, four blocking rods 21 are arranged side by side in the width direction of the good product conveying device 82, fixing rods 22 are fixed at two ends of the blocking rods 21, the fixing rods 22 are fixed on the good product conveying device 82 by bolts, and a first good product line 821, a second good product line 822 and a third good product line 823 are respectively marked off from every two blocking rods 21; simple structure with low costs, and easy dismantlement.

In addition, referring to fig. 1 and 6, a first start sensor 231 is installed at the feeding end of the defective product conveyor 81 in signal connection with the controller 11, and when the gripper 83 puts the piston pin into the feeding end of the defective product conveyor 81, the first start sensor 231 is triggered, and the controller 11 controls the defective product conveyor 81 to convey a unit, which is larger than the maximum diameter of the piston pin. The controller 11 controls the defective conveyer 81 to start only when the gripper 83 puts the piston pin into the feeding end of the defective conveyer 81, and conveys the piston pin to be put by a distance larger than the maximum diameter of the piston pin, so that the piston pin is not influenced to be normally put into the defective conveyer 81 by the gripper 83 next time.

Referring to fig. 1 and 6, the feeding end of the good product conveying device 82 is provided with a second starting sensor 232 in signal connection with the controller 11, when the mechanical claw 83 puts the piston pin into the feeding end of the good product conveying device 82, the second starting sensor 232 is triggered, and the controller 11 controls the good product conveying device 82 to convey a unit, wherein the unit is larger than the maximum diameter of the piston pin. Only when the gripper 83 puts the piston pin into the feeding end of the good product conveying device 82, the controller 11 controls the good product conveying device 82 to start, and the distance between the piston pin put in the conveying mode and the maximum diameter of the piston pin is greater than one section, so that the piston pin is normally put into the good product conveying device 82 by the gripper 83 next time.

In addition, referring to fig. 1 and 7, in this embodiment, the automatic piston pin outer diameter measuring machine further includes an empty tray automatic recovery frame 24, the empty tray automatic recovery frame 24 is located at the other end of the transfer rail 4, the transfer table 5 enters and exits from the bottom of the empty tray automatic recovery frame 24 through the transfer rail 4, and after the piston pin in the material tray 2 is completely captured by the intelligent capture mechanism 6, the controller 11 controls the driver 9 to drive the transfer table 5 to the bottom of the empty tray automatic recovery frame 24. In carrying out piston pin external diameter testing process, fill the piston pin in charging tray 2, and stack charging tray 2 and go into

automatic feeding frame

3, 11 control drivers of controller drive 9 drive changes material platform 5 and slides on changeing material track 4, change material platform 5 by sliding on changeing material track 4 and change the charging tray 2 switching in automatic feeding frame 3 to the intelligence snatchs the region of snatching of mechanism 6, piston pin when in charging tray 2 is snatched the back that finishes, 11 control drivers of controller drive 9 drive changes material platform 5 and carries out the recovery of empty charging tray 2 to empty tray automatic recovery frame 24 bottom, realize the automatic recovery of empty charging tray 2, the work load of operating personnel has been alleviateed, whole detection efficiency has more improved greatly.

Referring to fig. 1 and 7, the empty tray automatic recycling rack 24 includes an empty tray rack 241, a clamping turning plate 242 which is connected to two sides of the empty tray rack 241 in an upward rotating manner, a lifting cylinder 243 and a proximity sensor 244 which is connected to the controller 11 in a signal manner, wherein the lifting cylinder 243 is vertically fixed on the base 1 at the bottom of the empty tray rack 241, and the proximity sensor 244 is installed at the other end of the material transferring rail 4 and faces the material transferring table 5; when the material transferring platform 5 enters the bottom of the empty tray rack 241, the proximity sensor 244 is triggered, so that the controller 11 controls the lifting cylinder 243 to push upwards, the free end of the lifting cylinder 243 supports the empty tray 2 to lift upwards at the bottom of the empty tray rack 241, the empty tray 2 is jacked up to be turned upwards in the lifting process by the horizontal clamping turning plate 242 in a normal state, at the moment, the clamping turning plate 242 turns upwards for 90 degrees, so that the empty tray 2 continues to lift until the height of the empty tray 2 is higher than the height of the clamping turning plate 242 after being turned, at the moment, the clamping turning plate 242 is not blocked by the tray 2, the empty tray 2 falls to be in a horizontal clamping state through the self weight, the controller 11 controls the free end of the lifting cylinder 243 to retract, so that the empty tray 2 is clamped in the empty tray rack 241 by the clamping turning plate 242 in a horizontal state, and automatic recovery of.

In order to ensure that the tray 2 is more stable when being lifted, referring to fig. 1 and 7, a non-slip mat 25 is installed at the free end of the lifting cylinder 243; on the one hand, the contact area with the tray 2 is increased, and on the other hand, the friction coefficient with the tray 2 is increased, so that the tray 2 can be more stably lifted by the lifting cylinder 243.

Referring to fig. 1 and 7, an abutting block 26 is fixed at a rotation joint of the clamping flap 242 in the folding direction, and when the clamping flap 242 is folded upwards by 90 degrees, the abutting block 26 abuts against the upper surface of the clamping flap 242. After charging tray 2 is turned over board 242 by lifting jack-up joint, joint turns over board 242 and turns over a height that makes charging tray 2 pass through smoothly to 90 degrees, the upper surface butt that the board 242 was turned over to the joint this moment on butt piece 26 to keep the ninety degree angle of turning over of board 242 of joint, more make joint turn over board 242 when charging tray 2 lifting is higher than the height after turning over of board 242 of joint, joint turn over board 242 can drop to horizontally joint state through self weight smoothly, avoid because of the joint turns over the situation that board 242 can not return and take place charging tray 2 and drop.

In order to remind an operator of taking an empty tray 2 in time, referring to fig. 1 and 7, a full tray sensor 27 in signal connection with the controller 11 is mounted at the upper end of the empty tray rack 241, the controller 11 is further electrically connected with an alarm 28, when the empty tray rack 241 is full of trays 2, the full tray sensor 27 is triggered, and at the moment, the controller 11 controls the alarm 28 to give an alarm to remind the operator of taking the empty tray rack 241 of the trays 2. As time goes on, more and more empty trays 2 are recovered in the empty tray rack 241, when the number of empty trays 2 reaches a certain number, the full rack sensor 27 is triggered, and at this time, the controller 11 controls the alarm 28 to give an alarm to remind an operator to take away the trays 2 in the empty tray rack 241, so as to avoid influencing the subsequent entering of the empty tray rack 241 by the trays 2.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a piston pin external diameter automatic measure machine which characterized in that: including base (1), charging tray (2) that are used for adorning the piston pin, with charging tray (2) assorted automatic material loading frame (3), change material track (4), sliding connection in change material platform (5) of changing material track (4), the intelligence that is used for snatching the piston pin snatchs mechanism (6), pneumatic measuring instrument (7) and automatic classification device (8), change the bottom of material platform (5) business turn over automatic material loading frame (3) through changing material track (4), change material platform (5) and be connected with driver (9), pneumatic measuring instrument (7) include gauge head (71), gauge head (71) are provided with ejection mechanism (10), intelligence snatchs mechanism (6) and is used for snatching the piston pin in charging tray (2) and place in gauge head (71), automatic material loading frame (3), intelligence snatch mechanism (6), pneumatic measuring instrument (7), automatic classification device (8), The driver (9) and the ejection mechanism (10) are connected with a controller (11); the automatic feeding frame (3) comprises a rest frame (31) matched with the material tray (2) and a clamping device (32) used for clamping the material tray (2), the clamping device (32) is electrically connected with and controlled by the controller (11), and when the material transferring table (5) is positioned at the bottom of the rest frame (31), the height of the upper surface of the material transferring table (5) and the bottom surface of the bottommost material tray (2) in the rest frame (31) is equal to the thickness of the material tray (2); the intelligent grabbing mechanism (6) comprises a visual recognition device (61) in signal connection with the controller (11) and a double-shaft manipulator (62) for grabbing the piston pin, the double-shaft manipulator (62) is electrically connected with and controlled by the controller (11), the piston pin in the material tray (2) is subjected to foolproof positioning through the visual recognition device (61), and therefore the controller (11) controls the double-shaft manipulator (62) to accurately grab the piston pin; when the visual recognition device (61) recognizes that the piston pins in one transverse row in the material tray (2) are completely grabbed, the controller (11) controls the driver (9) to advance by one unit, and the unit is equal to the distance from the piston pins in the next row.

2. The automatic piston pin outside diameter measuring machine according to claim 1, characterized in that: clamping device (32) include two relative setting in electric jar (321) of rest stand (31) both sides and fix joint piece (322) at electric jar (321) free end, draw-in groove (211) with joint piece (322) matched with are all seted up to charging tray (2) both sides face.

3. The automatic piston pin outside diameter measuring machine according to claim 2, characterized in that: the double-shaft manipulator (62) comprises a driving mechanism (621) and an executing mechanism (622) which are electrically connected with the controller (11), wherein the executing mechanism (622) comprises a fixed seat (6221), an adsorption head (6222) vertically connected to the fixed seat (6221) and an air suction pipe (6223) connected to the adsorption head (6222), the adsorption head (6222) is matched with a piston pin, and the air suction pipe (6223) is connected with an air suction device (16).

4. An automatic piston pin outside diameter measuring machine according to claim 3, characterized in that: the adsorption head (6222) is vertically connected to the fixed seat (6221) in a sliding mode, the adsorption head (6222) is sleeved with a pressure spring (17), one end of the pressure spring (17) abuts against the fixed seat (6221), and the other end of the pressure spring abuts against the adsorption head (6222).

5. The automatic piston pin outside diameter measuring machine according to claim 1, characterized in that: the automatic sorting device (8) comprises a defective product conveying device (81), a non-defective product conveying device (82) and a mechanical claw (83) used for clamping the piston pin, the defective product conveying device (82) and the mechanical claw (83) are respectively connected with a controller (11), the controller (11) is preset with a first preset value and a fourth preset value which are sequentially increased, a pneumatic measuring instrument (7) sends a detection signal to the controller (11) when the measurement is finished, the controller (11) receives the detection signal and compares the detection signal with the first preset value and the fourth preset value, and when the detection signal is smaller than the first preset value or larger than the fourth preset value, the controller (11) controls the mechanical claw (83) to clamp the piston pin in the measuring head (71) and send the piston pin into the defective product conveying device (81); when the detection signal is larger than the first preset value and smaller than the fourth preset value, the controller (11) controls the mechanical claw (83) to clamp the piston pin in the measuring head (71) and send the piston pin into the good product conveying device (82).

6. An automatic piston pin outside diameter measuring machine according to claim 5, characterized in that: the controller (11) is also preset with a second preset value and a third preset value, the first preset value, the second preset value, the third preset value and the fourth preset value are sequentially increased, the good product conveying device (82) is divided into a first good product line (821), a second good product line (822) and a third good product line (823), and when the detection signal is larger than the first preset value and smaller than the second preset value, the controller (11) controls the mechanical claw (83) to clamp the piston pin in the measuring head (71) and send the piston pin into the first good product line (821); when the detection signal is larger than a second preset value and smaller than a third preset value, the controller (11) controls the mechanical claw (83) to clamp the piston pin in the measuring head (71) and send the piston pin into a second good product line (822); when the detection signal is larger than a third preset value and smaller than a fourth preset value, the controller (11) controls the mechanical claw (83) to clamp the piston pin in the measuring head (71) and send the piston pin into a third good product line (823).

7. The automatic piston pin outside diameter measuring machine according to claim 1, characterized in that: still retrieve frame (24) including the empty dish is automatic, empty dish is automatic to be retrieved frame (24) and is located the other end that changes material track (4), change material platform (5) through the bottom that changes material track (4) business turn over empty dish is automatic to be retrieved frame (24), snatch the piston pin in mechanism (6) with charging tray (2) when intelligence and snatch and finish the back, controller (11) control driver (9) drive change material platform (5) to empty dish are automatic to be retrieved frame (24) bottom.

8. The automatic piston pin outside diameter measuring machine according to claim 7, characterized in that: the automatic empty tray recycling frame (24) comprises an empty tray frame (241), a clamping turnover plate (242) which is connected to two sides of the empty tray frame (241) in a rotating mode and overturns upwards, a lifting cylinder (243) and a proximity sensor (244) which is connected to a controller (11) in a signal mode, wherein the lifting cylinder (243) is vertically fixed on a base (1) located at the bottom of the empty tray frame (241), the proximity sensor (244) is installed at the other end of a material rotating rail (4) and faces a material rotating table (5), when the material rotating table (5) enters the bottom of the empty tray frame (241), the proximity sensor (244) is triggered, and the controller (11) controls the lifting cylinder (243) to push upwards so as to lift a tray (2) to be higher than the turnover height of the clamping turnover plate (242).