CN117824541A

CN117824541A - A steel javelin coaxiality detection device and detection method

Info

Publication number: CN117824541A
Application number: CN202410082181.0A
Authority: CN
Inventors: 曹世龙
Original assignee: Hebei Feiyu Sports Development Co ltd
Current assignee: Hebei Feiyu Sports Development Co ltd
Priority date: 2024-01-19
Filing date: 2024-01-19
Publication date: 2024-04-05

Abstract

The invention discloses a steel javelin coaxiality detection device and a detection method, and belongs to the technical field of photoelectric detection. Steel javelin axiality detection device includes: base, clamping mechanism and detection mechanism. One end of the base is provided with a movable seat, and the other end of the base is provided with a fixed seat. The clamping mechanism comprises two clamping units which are coaxially arranged, the two clamping units are respectively arranged on the movable seat and the fixed seat, and a rotating structure for driving the clamping units on the fixed seat to rotate is arranged on the fixed seat. The detection mechanism is located between the fixed seat and the movable seat, a displacement photoelectric sensor is arranged on a fixed sleeve of the detection mechanism, and a correction assembly is arranged on the fixed sleeve. The base is provided with a sliding structure for driving the fixed sleeve to slide on the base. By adopting the steel javelin coaxiality detection device and the detection method, the javelin coaxiality can be detected and corrected by one-time clamping of the javelin, and the detection efficiency and accuracy are effectively improved.

Description

Steel javelin coaxiality detection device and detection method

Technical Field

The invention relates to the technical field of photoelectric detection, in particular to a steel javelin coaxiality detection device and a detection method.

Background

The javelin is a throwing project in track and field sports, and a gun rod of the javelin is of a structure with thick middle and thin two ends. The steel javelin is prepared by adopting a steel pipe through necking, and is influenced by the machining precision of equipment, the javelin can generate coaxiality errors in the preparation process, and the javelin has strict rules on coaxiality errors, so that the coaxiality of the javelin needs to be detected in the javelin preparation process. Axiality of the javelin is generally tested by using a radial circle runout tolerance value.

The prior patent 201920267760.7 discloses javelin coaxiality testing equipment, which comprises a support frame, a fixing device and a circle runout detecting system, wherein the circle runout detecting system comprises a circle runout detector and a detector bracket, and the detector bracket is arranged on a vertical guide rail; the measuring needle of the circle runout detector is aligned with the center of the javelin body and contacts with the javelin body, so that the coaxiality detection of the javelin is realized, the device has the characteristic of convenient operation, and the coaxiality value of the javelin can be accurately measured. The prior patent 202022441936.1 discloses a javelin axiality test equipment, including the base, vertical riser of installing in base top border department and be used for pressing from both sides tight clamping piece at javelin both ends, paste the circle that tightly javelin set up and beat the detector to and promote javelin reciprocate's promotion structure, under the drive of the electric telescopic handle of promotion structure, can promote the javelin that awaits measuring and prolong vertical direction and carry out reciprocating, be used for the circle that tests to beat the detector and paste tightly on the javelin, like this when the test, can test different cross-sections on the javelin, improve the precision of test. In the above patent, all detect through circle detector and javelin surface contact, circle detector of beating installs on the support, and circle detector of beating is in the cantilever state, along with the rotation of javelin, can influence circle detector of beating and detect stability, influence detection accuracy. And only can carry out the detection of javelin axiality in the above-mentioned patent, can not directly correct the javelin after the detection is accomplished, still need take off again to correct the javelin, detect again after the correction is accomplished, the javelin also can influence the result of detection at the dress card in-process that is repeated to the efficiency of detection is lower.

Disclosure of Invention

The invention aims to provide a device and a method for detecting the coaxiality of a steel javelin, which can finish the detection and correction of the coaxiality of the javelin by one-time clamping of the javelin, and effectively improve the detection efficiency and accuracy.

In order to achieve the above object, the present invention provides a steel javelin coaxiality detection device, comprising:

a movable seat is arranged at one end of the base, and a fixed seat is arranged at the other end of the base;

the clamping mechanism comprises two clamping units which are coaxially arranged, the two clamping units are respectively arranged on the movable seat and the fixed seat, the clamping units are used for clamping two ends of a workpiece, the fixed seat is provided with a rotating structure which drives the clamping units on the fixed seat to rotate,

the detection mechanism is positioned between the fixed seat and the movable seat and comprises a fixed sleeve, the fixed sleeve and the clamping unit are coaxially arranged, a displacement photoelectric sensor for measuring the distance from the surface of the workpiece to the cylindrical inner surface of the fixed sleeve is arranged on the fixed sleeve, and a correction assembly is arranged on the fixed sleeve; the base is provided with a sliding structure for driving the fixed sleeve to slide on the base.

Preferably, the base is provided with a first cylinder for driving the movable seat to slide on the base, the first cylinder is fixedly arranged on the base, a telescopic rod of the first cylinder is fixedly connected with one end middle part of the movable seat, the base is provided with a guide rail with guiding function on the sliding of the movable seat, the guide rail is arranged along the length direction of the base, the bottom of the movable seat is provided with a guide block, the guide rail is positioned in a groove arranged on the lower surface of the guide block, and the guide rail is in sliding connection with the groove.

Preferably, the sliding structure comprises a sliding seat, a fixed sleeve is arranged on the sliding seat, a transmission block is arranged on the lower surface of the sliding seat, a threaded hole which enables a first screw rod to penetrate through and be matched with the first screw rod is arranged on the transmission block, the first screw rod is rotationally connected with a base through a bearing, a first motor which drives the first screw rod to rotate is arranged on the base, the first screw rod is arranged along the length direction of the base, a guide rail which has a guiding effect on the sliding seat is arranged on the base, the guide rail is parallel to the first screw rod, the guide rails are positioned on two sides of the first screw rod, guide grooves which are matched with the guide rails are arranged on the sliding seat, and the guide rails are positioned in the guide grooves and are in sliding connection with the guide grooves.

Preferably, the correction assembly comprises a rotating sleeve, the rotating sleeve is arranged in the fixed sleeve in a rotating manner, a second gear ring is arranged on the outer surface of the rotating sleeve, a third motor for driving the second gear to rotate is arranged on the fixed sleeve, the second gear is meshed with the second gear ring, a mounting plate is arranged at one end of the outer portion of the fixed sleeve, a supporting structure for supporting a workpiece and a correction structure are arranged on the mounting plate, an adjusting structure for driving the supporting structure and the correction structure to synchronously move is arranged on the mounting plate, and the supporting structure and the end of the correction structure are in contact with the surface of the workpiece.

Preferably, the supporting structure comprises a lower slide plate, the lower slide plate is arranged on the mounting plate in a sliding manner, a fixed rod is arranged in the middle of the lower slide plate, a lower top plate for supporting a workpiece is arranged at the top end of the fixed rod, connecting rods are arranged on two sides of the lower slide plate, the connecting rods are symmetrically arranged on two sides of the fixed rod, transmission holes inclining from the outer side to the inner side of the mounting plate are formed in the lower slide plate, two transmission holes are symmetrically arranged on the fixed rod with respect to the fixed rod, a limit column is arranged on the connecting rods and is positioned in the transmission holes and is in sliding connection with the transmission holes, a compression rod is arranged at the top end of the connecting rod, a side pressing plate is arranged at one end of the compression rod close to the workpiece, the side pressing plate is positioned on two sides of the workpiece, and a limit groove with limit and guide effects on horizontal sliding of the compression rod is formed in the mounting plate; the extension lines of the fixed rod and the compression rod pass through the axis of the workpiece, and the acute angle included angle between the transmission hole and the horizontal plane is 45 degrees.

Preferably, the correcting structure comprises an upper sliding plate, the upper sliding plate is arranged on the mounting plate in a sliding manner, a fixing plate is arranged in the middle of the upper sliding plate, a cam is arranged between the fixing plates, an axle of the cam is rotationally connected with the fixing plate, a fifth motor for driving the axle to rotate is arranged on the fixing plate, an upper pressing plate is arranged below the fixing plate, vertical guide rods are arranged at two ends of the upper pressing plate, a guide plate is arranged between the fixing plates, a through hole for the guide rod to pass through is arranged on the guide plate, the guide rod is in sliding connection with the through hole, a first spring is arranged between the guide plate and the upper pressing plate, the upper pressing plate is in contact with the side face of the cam under the action of the first spring, and when the distance between the upper pressing plate and the axle is the largest, the upper pressing plate, the lower top plate and the side pressing plate are located on the same circumference.

Preferably, the adjusting structure comprises a fourth motor, the fourth motor is arranged on the mounting plate, a driving wheel is arranged on an output shaft of the fourth motor, a driven wheel is arranged on the end head of the second screw rod, the driving wheel is connected with the driven wheel through a transmission belt, the second screw rod is positioned on two sides of the mounting plate and is rotationally connected with the mounting plate, and threaded holes which enable the second screw rod to pass through and be matched with the second screw rod are formed in the upper sliding plate and the lower sliding plate; the second screw rod is a bidirectional screw rod, and the upper sliding plate and the lower sliding plate are respectively positioned at two ends of the second screw rod.

Preferably, the clamping unit comprises a vertical plate, the vertical plate is fixedly arranged on the movable seat and the fixed seat, a rotating plate is rotationally arranged on the vertical plate, a jacket penetrating through the rotating plate is arranged on the rotating plate, the jacket is coaxial with the fixed sleeve and the rotating sleeve, a plurality of ejector rods are arranged on the jacket in a circumferential array, the ejector rods are in sliding connection with the jacket, a transmission plate or a second clamping plate is arranged on the end head of each ejector rod, the transmission plate and the second clamping plate are arranged at intervals, a first clamping plate is arranged below the transmission plate, a sliding groove is arranged on an inclined surface at the bottom end of the transmission plate, a sliding block matched with the sliding groove is arranged on an inclined surface at the top of the first clamping plate, the sliding block is positioned in the sliding groove and is in sliding connection with the sliding groove, a positioning plate is arranged at one end of the transmission plate, a third spring is arranged between the positioning plate and the second clamping plate, and a second spring is arranged between the transmission plate and the inner wall of the jacket; the outside of the jacket is provided with a transmission structure for driving the ejector rod to synchronously slide on the jacket, and the first clamping plate is simultaneously contacted with the outer surface of the workpiece under the action of the transmission structure.

Preferably, the transmission structure comprises a sliding sleeve, the sliding sleeve is sleeved outside the jacket in a sliding manner and is coaxially arranged with the jacket, the inner surface of the sliding sleeve is a conical surface, a roller is rotatably arranged on the end head of the ejector rod, a guide groove with a guiding function for the sliding of the roller is arranged on the conical surface, the roller is positioned in the guide groove and is in sliding connection with the guide groove, one end of the sliding sleeve is connected with the connecting plate through a sliding rod, a sliding hole for the sliding rod to pass through is arranged on the rotating plate, the sliding rod is in sliding connection with the sliding hole, a second cylinder for driving the connecting plate to slide is arranged on the connecting plate, and the second cylinder is fixed on the vertical plate;

the rotating structure comprises a second motor and a speed reducer, wherein the second motor and the speed reducer are arranged on the base, a first gear is arranged on an output shaft of the speed reducer, and the first gear is meshed with a first gear ring arranged on the rotating plate.

A detection method based on the steel javelin coaxiality detection device comprises the following steps:

s1, one end of a workpiece passes through a fixed sleeve and a rotating sleeve, the other end of the workpiece is inserted into a jacket on a fixed seat, a second air cylinder on the fixed seat is started, the second air cylinder drives a sliding sleeve to slide through a connecting plate and a sliding rod, the sliding sleeve pushes a push rod to slide towards the workpiece through a conical surface and a roller, a second spring is stretched, a first clamping plate is firstly contacted with the surface of the workpiece, along with the sliding of the push rod, the first clamping plate slides along an inclined surface at the bottom of a transmission plate, a third spring is compressed, and the first clamping plate is pressed on the surface of the workpiece under the action of the third spring; the second clamping plate is clamped on the surface of the workpiece to finish clamping and positioning one end of the workpiece;

s2, starting a first air cylinder, wherein the first air cylinder drives the movable seat to slide, one end of a workpiece is inserted into a jacket of the movable seat, and starting a second air cylinder on the movable seat, and the second air cylinder clamps a first clamping plate and a second clamping plate on the movable seat on the surface of the workpiece, so that the workpiece is centered, pressed and fixed;

s3, starting a second motor, wherein the second motor drives a first gear to rotate through a speed reducer, the first gear drives a rotating plate to rotate through a first gear ring, the rotating plate drives a workpiece to rotate through a jacket, a displacement photoelectric sensor on a fixing seat detects the distance between the outer surface of the workpiece and the inner surface of a fixing sleeve, and coaxiality of the workpiece is detected; starting a first motor, driving a first screw rod to rotate, driving a sliding seat to slide on a base by the first screw rod, driving a fixed sleeve and a rotating sleeve to synchronously rotate by the sliding seat, and driving a displacement photoelectric sensor to synchronously move by the fixed sleeve to detect coaxiality of different cross sections of a workpiece;

s4, detecting a position to be corrected of the workpiece according to the displacement photoelectric sensor, starting a first motor, and driving the rotating sleeve to move to the position to be corrected by the first motor through the first screw rod and the sliding seat; starting a second motor, wherein the second motor drives the workpiece to rotate through a first gear and a first gear ring, and the position to be corrected is rotated to be right below the upper pressing plate;

s5, starting a fourth motor, wherein the fourth motor drives a second screw rod to rotate through a transmission belt, the second screw rod drives an upper slide plate and a lower slide plate to slide relatively, the upper slide plate drives an upper pressing plate to move downwards, the lower slide plate drives a lower top plate to move upwards, and meanwhile, the side pressing plates move relatively, and the upper pressing plate, the lower top plate and the side pressing plates are in contact with the outer surface of a workpiece; starting a third motor and a fifth motor, wherein the third motor drives the rotating sleeve to rotate in a reciprocating manner through the second gear and the second gear ring, the fifth motor drives the cam to rotate, and the cam drives the upper pressing plate to slide up and down under the action of the guide rod and the first spring so as to correct the surface of the workpiece;

s6, after correction is completed, starting a first motor, and driving the fixed sleeve to slide by the first motor through a first screw rod; starting a second motor, wherein the second motor drives the workpiece to rotate through a jacket, and detecting the workpiece through a displacement photoelectric sensor;

and S7, repeating the steps S4-S6, and finishing coaxiality detection and correction of the workpiece.

The steel javelin coaxiality detection device and the steel javelin coaxiality detection method have the advantages that:

1. the two ends of the base are respectively provided with the movable seat and the fixed seat, the movable seat and the fixed seat are respectively provided with the clamping mechanism, the clamping mechanism drives the second clamping block to simultaneously clamp the two ends of the workpiece through the sliding of the sliding sleeve, the centering synchronous clamping of the workpiece is realized, and the clamping and fixing operation of the workpiece is convenient.

2. The first clamping plate and the second clamping plate are arranged on the ejector rod of the clamping mechanism at intervals, the second clamping plate is used for positioning and clamping the workpiece, the first clamping plate is used for auxiliary clamping of the workpiece, and the stability of clamping the workpiece is improved.

3. The detection mechanism is arranged on the sliding seat, the displacement photoelectric sensor is arranged on the fixing sleeve of the detection mechanism, the displacement photoelectric sensor is not in contact with the surface of the workpiece, the influence of rotation of the workpiece is avoided, the working stability of the displacement photoelectric sensor is improved, and the detection precision is improved.

4. The fixed sleeve is provided with a rotating sleeve, the rotating sleeve is provided with a correcting component, the workpiece is corrected through the correcting component, the workpiece coaxiality detection and correction are achieved through sequential clamping of the workpiece, and the workpiece detection and correction efficiency is improved.

The technical scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a detecting mechanism according to an embodiment of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2;

FIG. 4 is a schematic side view of a detection mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic view of a correction module according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a clamping mechanism according to an embodiment of the present invention;

FIG. 7 is an enlarged view of B in FIG. 6;

FIG. 8 is an enlarged view of C in FIG. 6;

fig. 9 is a schematic side view of a clamping mechanism according to an embodiment of the invention.

Reference numerals

1. A base; 11. a first motor; 12. a first screw rod; 13. a movable seat; 14. a first cylinder; 15. a fixing seat; 16. a second motor; 17. a speed reducer; 18. a first gear;

2. a detection mechanism; 21. a slide; 22. a transmission block; 23. a fixed sleeve; 24. a rotating sleeve; 25. a mounting plate; 26. a displacement photoelectric sensor; 27. a third motor; 28. a second gear; 29. a second ring gear; 210. an upper slide plate; 211. a lower slide plate; 212. an upper press plate; 213. a lower top plate; 214. a side pressure plate; 215. a cam; 216. a wheel axle; 217. a fixing plate; 218. a guide plate; 219. a guide rod; 220. a first spring; 221. a fixed rod; 222. a connecting rod; 223. a compression bar; 224. a limit groove; 225. a transmission hole; 226. a limit column; 227. a fourth motor; 228. a driving wheel; 229. a second screw rod; 230. driven wheel; 231. a transmission belt; 232. a fifth motor;

3. a clamping mechanism; 31. a vertical plate; 32. a rotating plate; 33. a first ring gear; 34. a jacket; 35. a sliding sleeve; 36. a slide bar; 37. a second cylinder; 38. a connecting plate; 39. a push rod; 310. a roller; 311. a guide groove; 312. a drive plate; 313. a first clamping plate; 314. a second spring; 315. a third spring; 316. a positioning plate; 317. a second clamping plate; 318. a sliding block.

Detailed Description

The technical scheme of the invention is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

As shown in fig. 1, the steel javelin coaxiality detection device comprises a base 1, a clamping mechanism 3 and a detection mechanism 2, wherein the base 1 provides support for the whole device. The clamping mechanism 3 is used for clamping two ends of a workpiece in a centering manner and fixing the workpiece in a centering manner. The detection mechanism 2 is used for detecting coaxiality of the workpiece. The base 1 is fixed on the ground. One end of the base 1 is provided with a movable seat 13, and the other end of the base 1 is fixedly provided with a fixed seat 15. The base 1 is provided with a first cylinder 14 which drives the movable seat 13 to slide on the base 1, and the first cylinder 14 is fixedly arranged on the base 1. The telescopic rod of the first air cylinder 14 is fixedly connected with the middle part of one end of the movable seat 13. The first cylinder 14 is connected to a controller. The movable seat 13 is driven to slide on the base 1 by the expansion and contraction of the first air cylinder 14. The base 1 is fixedly provided with a guide rail having a guiding function for sliding of the movable seat 13, and the guide rail is arranged along the length direction of the base 1. The bottom of the movable seat 13 is provided with a guide block, the guide rail is positioned in a groove arranged on the lower surface of the guide block, and the guide rail is in sliding connection with the groove.

As shown in fig. 6 to 9, the clamping mechanism 3 includes two coaxially arranged clamping units, which are respectively disposed on the movable seat 13 and the fixed seat 15, and are used for clamping two ends of a workpiece. The clamping unit comprises a vertical plate 31, and the vertical plate 31 is fixedly arranged on the movable seat 13 and the fixed seat 15. The vertical plate 31 is rotatably provided with a rotating plate 32 through a bearing, and the rotating plate 32 is fixedly provided with a jacket 34 penetrating the rotating plate 32. A plurality of ejector rods 39 are arranged on the jacket 34 in a circumferential array, through holes for the ejector rods 39 to pass through are arranged on the side wall of the jacket 34, and the ejector rods 39 slide in the through holes. The through holes have a guiding effect on the sliding of the jack 39 so that the jack 39 slides along a straight line passing through the axis of the jacket 34. The end of the ejector rod 39 is fixedly provided with a transmission plate 312 or a second clamping plate 317, and the transmission plate 312 and the second clamping plate 317 are arranged at intervals. A first clamping plate 313 is provided below the drive plate 312. The bottom end of the driving plate 312 is a slope gradually inclined downward from the inside of the jacket 34 to the outside, and the top of the first clamping plate 313 is provided with a slope adapted to the slope of the bottom end of the driving plate 312. A sliding groove is arranged on the inclined plane of the bottom end of the transmission plate 312, a sliding block 318 matched with the sliding groove is arranged on the inclined plane of the top of the first clamping plate 313, and the sliding block 318 is positioned in the sliding groove and is in sliding connection with the sliding groove. The sliding groove and the sliding block 318 have a guiding function on the sliding of the first clamping plate 313, so that the first clamping plate 313 slides along the bottom end inclined plane of the transmission plate 312. The chute may be a dovetail or T-shaped slot as desired to prevent the first clamping plate 313 from falling off the drive plate 312.

One end of the transmission plate 312 is fixedly provided with a positioning plate 316, a third spring 315 is arranged between the positioning plate 316 and the second clamping plate 317, and two ends of the third spring 315 are fixedly connected with the positioning plate 316 and the second clamping plate 317 respectively. The third spring 315 applies an outward pushing force to the second clamp plate 317. A second spring 314 is arranged between the transmission plate 312 and the inner wall of the jacket 34, two ends of the second spring 314 are fixedly connected with the inner wall of the jacket 34 and the transmission plate 312 respectively, and the second spring 314 is sleeved outside the ejector rod 39.

The outside of the jacket 34 is provided with a transmission structure for driving the ejector rod 39 to synchronously slide on the jacket 34. The transmission structure comprises a sliding sleeve 35, wherein the sliding sleeve 35 is sleeved outside the jacket 34 in a sliding way and is coaxially arranged with the jacket 34. The inner surface of the sliding sleeve 35 is a conical surface. The end of the push rod 39 is rotatably provided with a roller 310, and the conical surface is provided with a guide groove 311 with a guiding function for sliding of the roller 310. The roller 310 is positioned within the guide slot 311 and is slidably coupled to the guide slot 311. The push rod 39 makes the roller 310 always contact with the bottom surface of the guide groove 311 under the action of the second spring 314.

One end of the sliding sleeve 35 is connected with the connecting plate 38 through a sliding rod 36, and two ends of the sliding rod 36 are respectively fixed on the sliding sleeve 35 and the connecting plate 38. The rotating plate 32 is provided with a slide hole through which the slide bar 36 passes, and the slide bar 36 is slidably connected to the slide hole. The slide bar 36 slides horizontally under the action of the slide hole. The connecting plate 38 is provided with a second air cylinder 37 which drives the connecting plate 38 to slide, and the second air cylinder 37 is horizontally fixed on the vertical plate 31. The piston rod of the second cylinder 37 is rotatably connected with the center of the connecting plate 38 through a bearing.

The connecting plate 38 is driven to move through the expansion and contraction of the piston rod of the second air cylinder 37, the connecting plate 38 drives the sliding sleeve 35 to slide through the sliding rod 36, the sliding sleeve 35 drives the ejector rod 39 to synchronously move through the conical surface and the roller 310, and the ejector rod 39 drives the second clamping plate 317 at the bottom end of the ejector rod to synchronously clamp on the surface of a workpiece, so that the workpiece is centered and clamped. The first clamping plate 313 carries out auxiliary clamping on the workpiece, the ejector rod 39 drives the transmission plate 312 and the first clamping plate 313 to synchronously move in the moving process, the first clamping plate 313 is in contact with the surface of the workpiece, along with the continuous sliding of the ejector rod 39, the first clamping plate 313 slides along the inclined plane of the bottom end of the transmission plate 312, the third spring 315 compresses, and the first clamping plate 313 is always clamped on the surface of the workpiece under the action of the third spring 315 to carry out auxiliary clamping on the workpiece. When the workpiece is detected or corrected, the first clamping plate 313 is still clamped on the surface of the workpiece, so that the stability of workpiece fixing is improved. The surfaces of the first clamping plate 313 and the second clamping plate 317, which are in contact with the workpiece, are provided with rubber protection anti-slip pads for protecting the workpiece, and the friction between the workpiece and the first clamping plate 313 and the second clamping plate 317 is also improved.

The fixed seat 15 is provided with a rotating structure for driving the rotating plate 32 on the fixed seat 15 to rotate. The rotating structure comprises a second motor 16 and a speed reducer 17, and the second motor 16 and the speed reducer 17 are fixedly arranged on the base 1. The output shaft of the speed reducer 17 is fixedly provided with a first gear 18, and the first gear 18 is meshed with a first gear ring 33 provided on the rotating plate 32. The second motor 16 drives the first gear 18 to rotate through the speed reducer 17, the first gear 18 drives the rotating plate 32 to rotate through the first gear ring 33, the rotating plate 32 drives the sliding sleeve 35 and the jacket 34 to synchronously rotate through the sliding rod 36, and therefore the workpiece is driven to rotate, and coaxiality detection is carried out on the workpiece.

As shown in fig. 2, the detection mechanism 2 is located between the fixed seat 15 and the movable seat 13. The detection mechanism 2 comprises a fixed sleeve 23, and a sliding structure for driving the fixed sleeve 23 to slide on the base 1 is arranged on the base 1. The sliding structure comprises a sliding seat 21, and a fixing sleeve 23 is fixedly arranged on the sliding seat 21. A transmission block 22 is arranged on the lower surface of the sliding seat 21, and a threaded hole which enables the first screw rod 12 to pass through and be matched with the first screw rod 12 is arranged on the transmission block 22. The first screw rod 12 is rotatably connected with the base 1 through a bearing, and a first motor 11 for driving the first screw rod 12 to rotate is arranged on the base 1. The first screw 12 is disposed along the length direction of the base 1. The base 1 is provided with guide rails which have a guiding effect on the sliding of the sliding seat 21, the guide rails are arranged in parallel with the first screw rod 12, and the guide rails are positioned on two sides of the first screw rod 12. The slide 21 is provided with a guide groove matched with a guide rail, and the guide rail is positioned in the guide groove and is in sliding connection with the guide groove. The first motor 11 drives the sliding seat 21 and the fixed sleeve 23 to slide on the base 1 through the first screw rod 12 and the transmission block 22.

The fixed sleeve 23 is provided with a displacement photoelectric sensor 26 for measuring the distance from the surface of the workpiece to the cylindrical inner surface of the fixed sleeve 23, and the displacement photoelectric sensor 26 adopts the existing structure according to the requirement. The displacement photoelectric sensor 26 detects the coaxiality of the workpiece by calculating the distance between the surface of the workpiece and the displacement photoelectric sensor 26 by using the time of light emission and light reception according to the fact that the light is reflected after being irradiated on the surface of the workpiece. The displacement photoelectric sensor 26 is fixed on the fixed sleeve 23, is not in contact with the surface of a workpiece and is not influenced by rotation of the workpiece, and the fixed sleeve 23 only slides on the base 1, so that the stability of the working of the displacement photoelectric sensor 26 is improved, and the detection precision is improved.

The fixing sleeve 23 is provided with a correction component. The correcting component comprises a rotating sleeve 24, and the rotating sleeve 24 is rotationally sleeved inside a fixed sleeve 23. The fixed sleeve 23, the rotating sleeve 24 and the jacket 34 are coaxially arranged. The outer surface of the rotating sleeve 24 is fixedly provided with a second gear ring 29, the fixed sleeve 23 is fixedly provided with a third motor 27 for driving the second gear 28 to rotate, and the second gear 28 is meshed with the second gear ring 29. The third motor 27 drives the second gear 28 to rotate, and the second gear 28 drives the second gear ring 29 to rotate, so that the rotating sleeve 24 is driven to rotate.

The rotating sleeve 24 is fixedly arranged at one end outside the fixed sleeve 23, and a mounting plate 25 is arranged on the end, and a supporting structure and a correcting structure for supporting the workpiece are arranged on the mounting plate 25. The mounting plate 25 is provided with an adjusting structure for driving the supporting structure and the correcting structure to synchronously move, and the adjusting structure enables the ends of the supporting structure and the correcting structure to be in contact with the surface of the workpiece.

As shown in fig. 4, the support structure includes a lower slide plate 211, and the lower slide plate 211 is slidably disposed on the mounting plate 25. A fixing rod 221 is fixedly provided at the middle of the lower slide plate 211, and a lower top plate 213 supporting the workpiece is fixedly provided at the top end of the fixing rod 221. The lower sliding plate 211 is provided at both sides thereof with a connection rod 222, and the connection rod 222 is symmetrically disposed at both sides of the fixing rod 221. The lower slide plate 211 is provided with a transmission hole 225 inclined inward from the outside of the mounting plate 25, and the two transmission holes 225 are symmetrically arranged with respect to the fixing lever 221. The connecting rod 222 is fixedly provided with a limiting column 226, and the limiting column 226 is positioned in the transmission hole 225 and is in sliding connection with the transmission hole 225. The top of the connecting rod 222 is fixedly provided with a pressing rod 223, one end of the pressing rod 223 close to the workpiece is fixedly provided with a side pressing plate 214, and the side pressing plates 214 are positioned on two sides of the workpiece. The mounting plate 25 is provided with a limit groove 224 with limit and guide functions on the horizontal sliding of the compression bar 223, and the compression bar 223 horizontally slides under the action of the limit groove 224.

The extension lines of the fixing rod 221 and the compression rod 223 pass through the axis of the workpiece, so that the lower top plate 213 and the side pressure plate 214 respectively support the workpiece from the right lower part and the two sides of the workpiece, the stability of the workpiece support is improved, and the deformation of the workpiece in the correcting process is reduced. The acute angle contained angle of the transmission hole 225 and the horizontal plane is 45 degrees, so that the vertical sliding distance of the lower sliding plate 211 is equal to the horizontal sliding distance of the pressing rod 223, the lower top plate 213 and the side pressing plate 214 can be always contacted with the surface of a workpiece at the same time, the workpiece is supported in a centering manner, deformation of the workpiece caused during supporting of the workpiece is avoided, and the accuracy in correcting is improved.

As shown in fig. 3 and 5, the corrective structure includes an upper slide 210, and the upper slide 210 is slidably disposed on the mounting plate 25. A fixing plate 217 is fixedly provided at the middle of the upper slide 210, and a cam 215 is provided between the two fixing plates 217. The axle 216 of the cam 215 is rotatably connected to the fixed plate 217 via bearings. The fifth motor 232 for driving the wheel shaft 216 to rotate is fixedly arranged on the fixing plate 217. An upper platen 212 is provided below the fixing plate 217, and the upper platen 212 is located directly above the workpiece. Vertical guide rods 219 are fixedly arranged at two ends of the upper pressing plate 212. A guide plate 218 is fixedly arranged between the fixing plates 217, through holes for the guide rods 219 to pass through are formed in the guide plate 218, and the guide rods 219 are connected with the through holes in a sliding mode. A first spring 220 is arranged between the guide plate 218 and the upper pressure plate 212, and two ends of the first spring 220 are fixedly connected with the guide plate 218 and the upper pressure plate 212 respectively. The first spring 220 is sleeved outside the guide rod 219. The upper platen 212 is always in contact with the side of the cam 215 by the first spring 220. When the distance between the upper pressing plate 212 and the wheel shaft 216 is the largest, the upper pressing plate 212, the lower top plate 213 and the side pressing plates 214 are positioned on the same circumference, namely when the surface of the workpiece is corrected, the surface of the workpiece is knocked through the upper pressing plate 212, so that the surface of the workpiece can be positioned on the same circumference, and the coaxiality of the workpiece is corrected.

The adjustment structure includes a fourth motor 227, the fourth motor 227 being fixedly disposed on the mounting plate 25. A driving wheel 228 is fixedly arranged on the output shaft of the fourth motor 227. The end of the second lead screw 229 is fixedly provided with a driven wheel 230, and the driving wheel 228 is connected with the driven wheel 230 through a driving belt 231. The second lead screws 229 are located at both sides of the mounting plate 25 and are rotatably connected with the mounting plate 25 through bearing blocks. Screw holes for allowing the second screw rod 229 to pass through and be matched with the second screw rod 229 are arranged on the upper slide plate 210 and the lower slide plate 211. The second lead screw 229 is a bidirectional lead screw, and the upper slider 210 and the lower slider 211 are respectively located at two ends of the second lead screw 229. The fourth motor 227 drives the driven wheel 230 to rotate through the driving wheel 228 and the driving belt 231, the driven wheel 230 drives the two second lead screws 229 to synchronously rotate, and the second lead screws 229 drive the upper sliding plate 210 and the lower sliding plate 211 to synchronously slide relatively or reversely through the threaded holes, so as to drive the upper pressing plate 212, the side pressing plate 214 and the lower pressing plate to synchronously slide.

The first motor 11, the second motor 16, the third motor 27, the fourth motor 227, the fifth motor 232, the first cylinder 14, the second cylinder 37 and the displacement photoelectric sensor 26 are all connected with a controller according to the need by adopting the prior art, and the controller also processes the data of the displacement photoelectric sensor 26 by adopting the prior art.

The detection method based on the steel javelin coaxiality detection device comprises the following steps of:

s1, one end of a workpiece penetrates through the fixed sleeve 23 and the rotating sleeve 24, and the other end of the workpiece is inserted into the jacket 34 on the fixed seat 15. Starting a second air cylinder 37 on the fixed seat 15, driving a sliding sleeve 35 to slide by a connecting plate 38 and a sliding rod 36, pushing an ejector rod 39 to slide towards a workpiece by the sliding sleeve 35 through a conical surface and a roller 310, stretching a second spring 314, enabling a first clamping plate 313 to contact with the surface of the workpiece firstly, enabling the first clamping plate 313 to slide along an inclined plane at the bottom of a transmission plate 312 along with the sliding of the ejector rod 39, compressing a third spring 315, and enabling the first clamping plate 313 to be pressed on the surface of the workpiece under the action of the third spring 315; the second clamping plate 317 clamps on the surface of the workpiece to complete clamping and positioning of one end of the workpiece.

S2, starting a first air cylinder 14, wherein the first air cylinder 14 drives the movable seat 13 to slide on the base 1, and inserting one end of a workpiece into a jacket 34 of the movable seat 13. The first air cylinder 14 is stopped, the second air cylinder 37 on the movable seat 13 is started, and the second air cylinder 37 clamps the first clamping plate 313 and the second clamping plate 317 on the movable seat 13 on the surface of the workpiece, so that the other end of the workpiece is centered, pressed and fixed.

S3, starting the second motor 16, wherein the second motor 16 drives the first gear 18 to rotate through the speed reducer 17, the first gear 18 drives the rotating plate 32 to rotate through the first gear ring 33, and the rotating plate 32 drives the workpiece to rotate through the jacket 34. The displacement photoelectric sensor 26 on the fixed seat 15 detects the distance between the outer surface of the workpiece and the inner surface of the fixed sleeve 23, and detects the coaxiality of the workpiece. The first motor 11 is started, the first motor 11 drives the first screw rod 12 to rotate, the first screw rod 12 drives the sliding seat 21 to slide on the base 1, the sliding seat 21 drives the fixed sleeve 23 and the rotating sleeve 24 to synchronously rotate, and the fixed sleeve 23 drives the displacement photoelectric sensor 26 to synchronously move, so that coaxiality of different cross sections of a workpiece is detected. The displacement photoelectric sensor 26 transmits the detected data to the controller in real time for processing to determine the position to be corrected of the workpiece.

S4, detecting the position to be corrected of the workpiece according to the displacement photoelectric sensor 26. The first motor 11 is started, and the first motor 11 drives the rotating sleeve 24 to move to the position to be corrected through the first screw rod 12 and the sliding seat 21. The second motor 16 is started, and the second motor 16 drives the workpiece to rotate through the first gear 18 and the first gear ring 33, so that the position to be corrected is rotated to be right below the upper pressing plate 212.

S5, starting a fourth motor 227, wherein the fourth motor 227 drives a second lead screw 229 to rotate through a transmission belt 231, the second lead screw 229 drives an upper slide plate 210 and a lower slide plate 211 to slide relatively, the upper slide plate 210 drives an upper pressing plate 212 to move downwards, the lower slide plate 211 drives a lower top plate 213 to move upwards, and meanwhile, a side pressing plate 214 moves relatively, and the upper pressing plate 212, the lower top plate 213 and the side pressing plate 214 are in contact with the outer surface of a workpiece. The third motor 27 and the fifth motor 232 are started, the fifth motor 232 drives the cam 215 to rotate, and the cam 215 drives the upper pressing plate 212 to slide up and down under the action of the guide rod 219 and the first spring 220, so that the surface of a workpiece is corrected; the third motor 27 drives the rotating sleeve 24 to rotate reciprocally through the second gear 28 and the second gear ring 29, and the correction to be performed reciprocally through the upper pressing plate 212.

And S6, after correction is completed, starting the first motor 11, and driving the fixed sleeve 23 to slide by the first motor 11 through the first screw rod 12. The second motor 16 is started, the second motor 16 drives the workpiece to rotate through the jacket 34, and the workpiece is detected through the displacement photoelectric sensor 26.

Therefore, the detection device and the detection method for the coaxiality of the steel javelin can finish the detection and correction of the coaxiality of the javelin by one-time clamping of the javelin, and effectively improve the detection efficiency and accuracy.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.

Claims

1. The utility model provides a steel javelin axiality detection device which characterized in that includes:

2. The steel javelin coaxiality detection device according to claim 1, wherein: the base is provided with a first cylinder for driving the movable seat to slide on the base, the first cylinder is fixedly arranged on the base, a telescopic rod of the first cylinder is fixedly connected with one end middle part of the movable seat, the base is provided with a guide rail with guiding function on the sliding of the movable seat, the guide rail is arranged along the length direction of the base, the bottom of the movable seat is provided with a guide block, the guide rail is positioned in a groove formed in the lower surface of the guide block, and the guide rail is in sliding connection with the groove.

3. The steel javelin coaxiality detection device according to claim 2, wherein: the sliding structure comprises a sliding seat, a transmission block is arranged on the lower surface of the sliding seat, a threaded hole which enables a first screw rod to penetrate through and be matched with the first screw rod is arranged on the transmission block, the first screw rod is rotationally connected with a base through a bearing, a first motor which drives the first screw rod to rotate is arranged on the base, the first screw rod is arranged along the length direction of the base, a guide rail which has a guiding effect on the sliding of the sliding seat is arranged on the base, the guide rail and the first screw rod are arranged in parallel, the guide rail is positioned on two sides of the first screw rod, and a guide groove which is matched with the guide rail is arranged on the sliding seat, and the guide rail is positioned in the guide groove and is in sliding connection with the guide groove.

4. A steel javelin coaxiality detection device according to claim 3, wherein: the correction assembly comprises a rotating sleeve, the rotating sleeve is arranged inside a fixed sleeve in a sleeved mode, a second gear ring is arranged on the outer surface of the rotating sleeve, a third motor for driving the second gear to rotate is arranged on the fixed sleeve, the second gear is meshed with the second gear ring, a mounting plate is arranged at one end of the outer portion of the fixed sleeve, a supporting structure and a correction structure for supporting a workpiece are arranged on the mounting plate, an adjusting structure for driving the supporting structure and the correction structure to synchronously move is arranged on the mounting plate, and the supporting structure is in contact with the surface of the workpiece with the end head of the correction structure.

5. The steel javelin coaxiality detection device according to claim 4, wherein: the supporting structure comprises a lower sliding plate, the lower sliding plate is arranged on a mounting plate in a sliding manner, a fixed rod is arranged in the middle of the lower sliding plate, a lower top plate for supporting a workpiece is arranged at the top end of the fixed rod, connecting rods are arranged on two sides of the lower sliding plate, the connecting rods are symmetrically arranged on two sides of the fixed rod, transmission holes inclining from the outer side to the inner side of the mounting plate are formed in the lower sliding plate, two transmission holes are symmetrically arranged relative to the fixed rod, a limit column is arranged on the connecting rods and is positioned in the transmission holes and is in sliding connection with the transmission holes, a pressing rod is arranged at the top end of the connecting rod, a side pressing plate is arranged at one end of the pressing rod, which is close to the workpiece, the side pressing plate is positioned on two sides of the workpiece, and a limit groove with limiting and guiding functions for the horizontal sliding of the pressing rod is arranged on the mounting plate; the extension lines of the fixed rod and the compression rod pass through the axis of the workpiece, and the acute angle included angle between the transmission hole and the horizontal plane is 45 degrees.

6. The steel javelin coaxiality detection device according to claim 5, wherein: the correcting structure comprises an upper sliding plate, the upper sliding plate is arranged on a mounting plate in a sliding manner, a fixing plate is arranged in the middle of the upper sliding plate, a cam is arranged between the fixing plates, an axle of the cam is connected with the fixing plate in a rotating manner, a fifth motor for driving the axle to rotate is arranged on the fixing plate, an upper pressing plate is arranged below the fixing plate, vertical guide rods are arranged at two ends of the upper pressing plate, guide plates are arranged between the fixing plates, through holes for the guide rods to penetrate are formed in the guide plates, the guide rods are in sliding connection with the through holes, a first spring is arranged between the guide plates and the upper pressing plate, the upper pressing plate is in contact with the side face of the cam under the action of the first spring, and when the distance between the upper pressing plate and the axle is the largest, the upper pressing plate, the lower top plate and the side pressing plate are located on the same circumference.

7. The steel javelin coaxiality detection device of claim 6, wherein: the adjusting structure comprises a fourth motor, the fourth motor is arranged on the mounting plate, a driving wheel is arranged on an output shaft of the fourth motor, a driven wheel is arranged at the end of the second screw rod, the driving wheel is connected with the driven wheel through a transmission belt, the second screw rod is positioned on two sides of the mounting plate and is rotationally connected with the mounting plate, and threaded holes which enable the second screw rod to pass through and be matched with the second screw rod are formed in the upper sliding plate and the lower sliding plate; the second screw rod is a bidirectional screw rod, and the upper sliding plate and the lower sliding plate are respectively positioned at two ends of the second screw rod.

8. The steel javelin coaxiality detection device of claim 7, wherein: the clamping unit comprises a vertical plate, the vertical plate is fixedly arranged on the movable seat and the fixed seat, a rotating plate is rotatably arranged on the vertical plate, a clamping sleeve penetrating through the rotating plate is arranged on the rotating plate, the clamping sleeve is coaxial with the fixed sleeve and the rotating sleeve, a plurality of ejector rods are arranged on the clamping sleeve in a circumferential array, the ejector rods are in sliding connection with the clamping sleeve, a transmission plate or a second clamping plate is arranged on the end head of each ejector rod, the transmission plate and the second clamping plate are arranged at intervals, a first clamping plate is arranged below the transmission plate, a sliding groove is arranged on an inclined surface at the bottom end of the transmission plate, a sliding block matched with the sliding groove is arranged on an inclined surface at the top of the first clamping plate, the sliding block is positioned in the sliding groove and is in sliding connection with the sliding groove, a positioning plate is arranged at one end of the transmission plate, a third spring is arranged between the positioning plate and the second clamping sleeve, and a second spring is arranged between the transmission plate and the inner wall of the clamping sleeve; the outside of the jacket is provided with a transmission structure for driving the ejector rod to synchronously slide on the jacket, and the first clamping plate is simultaneously contacted with the outer surface of the workpiece under the action of the transmission structure.

9. The steel javelin coaxiality detection device of claim 8, wherein: the transmission structure comprises a sliding sleeve, the sliding sleeve is sleeved outside the jacket in a sliding manner and is coaxially arranged with the jacket, the inner surface of the sliding sleeve is a conical surface, a roller is rotatably arranged on the end head of the ejector rod, a guide groove with a guiding function for the sliding of the roller is arranged on the conical surface, the roller is positioned in the guide groove and is in sliding connection with the guide groove, one end of the sliding sleeve is connected with the connecting plate through a sliding rod, a sliding hole for the sliding rod to pass through is arranged on the rotating plate, the sliding rod is in sliding connection with the sliding hole, a second air cylinder for driving the connecting plate to slide is arranged on the connecting plate, the second air cylinder is fixed on the vertical plate, and a piston rod of the second air cylinder is in rotating connection with the connecting plate;

10. A detection method based on the steel javelin coaxiality detection device as claimed in claim 9, characterized by comprising the following steps: