WO2014101335A1

WO2014101335A1 - X-ray inspection machine and method for tire expansion and spin driving

Info

Publication number: WO2014101335A1
Application number: PCT/CN2013/071290
Authority: WO
Inventors: 袁仲雪; 任立国; 李石磊; 赵敬华
Original assignee: Yuan Zhongxue
Priority date: 2012-12-24
Filing date: 2013-02-01
Publication date: 2014-07-03
Also published as: CN103901054A

Abstract

An X-ray inspection machine and a method for tire expansion and spin driving. A vertical inspection machine expands the tire outwards from the bead part for positioning, centering, and spin driving, so as to improve the stability of the tire during high-speed spin, thereby improving imaging quality in X-ray inspection, improving X-ray inspection quality and enhancing the efficiency. The X-ray inspection machine comprises: a lead chamber; an X-ray running device; an imaging system running device; a tire-expanding and spin-driving device, having a rack and at least one set of guide rods, each side of each guide rod being mounted on the rack by a mounting bracket; guide bushings, co-axially sleeved on the guide rods by a bearing to bear the tire, so as to drive the tire to spin by pressing the tire bead; a connection rod, the center of which is fixedly and axially provided on the rack, one end of which is connected to a hinge pin for axially arranging the mounting bracket, and the other end of which is connected to a slide rack; the slide rack, moving along the straight line back and forth by a first driving device on the rack; and a second driving device, for being connected to the guide brushings and driving the guide brushings to move axially to drive the tire to spin.

Description

X-ray inspection machine and its expansion tire rotation driving method

[0001] The present invention relates to an improvement of a whole machine structure and a tire expansion rotary driving method applied to a tire X-ray inspection machine, and belongs to the field of rubber machinery and industrial automation control.

Background technique

[0002] In order to improve the production quality and safe use cycle of motor vehicle tires, a series of online inspection items are required in the manufacturing process. If X-rays are used for flaw detection of the inner layer of the tire, the signal generated by the radiation through the tire is used to image on the receiving device, thereby verifying whether there are defects such as faults, bubbles, and wire breakage inside the tire, and according to the test results. Tires are identified and graded.

[0003] In the conventional X-ray inspection machine, the detected tire is usually placed on the rotating roller vertically or horizontally, and the X-ray tube is driven into the inside of the sub-port to perform image acquisition. During the start and the start of the test, the tread portion of the detected tire is usually clamped from the outside by two or more sets of arms, so that the tire coincides with the axis of the centering device including the above-mentioned arm member, that is, Perform the centering operation first. Then, under the axial rotation of a set of arms, the tire rotates around its axis to match the image of the X-ray tube inside the sub-port.

[0004] As the above prior art features, there are mainly the following shortcomings and deficiencies:

1. The tire tread has a certain depth pattern. When the arm is clamped and driven to rotate, it is susceptible to surface irregularity. The tire is easy to jump and unstable when rotating at high speed, thus affecting the X-ray inspection imaging. Image quality, which leads to a decline in inspection quality;

2. Clamping and rotating the tire from the outside of the tread. The main areas of the X-ray inspection, such as the tread and the sidewall, will correspond.

The formation of a certain deformation of the ground will also directly affect the image quality of the inspection image.

In view of this, the present patent application is filed.

Summary of the invention

[0006] The X-ray inspection machine and the tire expansion rotation driving method thereof have the purpose of solving the above problems in the prior art, and aiming at the vertical detection machine and the test method by expanding outward from the sub-port , centering and rotary drive mode, to improve the stability of the tire when rotating at high speed, and thus improve the quality of X-ray inspection imaging, improve the quality and efficiency of X-ray inspection.

[0007] Another object of the invention is to further increase the expansion of the nozzle mechanism for facilitating entry of the X-ray tube from the sub-port into the interior of the tire, and to maintain the stability of the expansion of the sub-port during the rotation to further reduce the inspection of the tire. The purpose of regional deformation.

[0008] In order to achieve the above object, the X-ray inspection machine mainly includes: a lead room for sealing the tire, and the following devices installed in the lead room,

X-ray motion device for conveying X-ray tube to the tire mouth to emit X-ray;

An imaging system motion device for delivering a detector to one side of the tire to receive X-rays and to image;

The difference from the prior art is that it also includes a tire expansion rotary drive for carrying the tire and driving the tire to rotate during the detection.

[0009] a tire expansion rotary drive device having a frame and

At least one set of guide rods, the side portions of which are mounted to the frame through the mounting bracket;

The guide sleeve is coaxially sleeved in the guide body through the bearing to carry the tire, press the tire sub-port and drive the tire to rotate; the connecting rod, the central fixed shaft is arranged on the frame, and one side end is connected to the shaft mounting bracket a pin, the other end of which is connected to the carriage;

a carriage that reciprocates linearly on the frame by the first driving device;

a second driving device for connecting and driving the guide sleeve to rotate in the axial direction to drive the tire to rotate.

[0010] As in the basic feature described above, the guide sleeve is carried by the guide body to support the detected tire from the sub-port. The linear motion of the carriage affects the position and the swing direction of the side end connected to the connecting rod with respect to the tire axial center. Since the middle portion of the connecting rod is fixedly disposed on the frame, the other side end passes through the mounting bracket based on the principle of the lever. Finally, the guide sleeve is driven to move in the radial direction of the tire, that is, the force transmission when the tire sub-port is pressed and the tire is driven to rotate.

[0011] Contrary to the above process, when the carriage moves linearly in the opposite direction, the connecting rod drives the guide sleeve to reversely swing and release the tire, that is, the state of returning only supports the tire sub-port, and the tire can be directly after the detection is completed. Uninstall.

[0012] The main function of the above solution is that, in order to cooperate with the X-ray tube to enter the inside of the tire and the detector receives the X-ray, the premise is how to press and position the tire from the tire sub-port and how to stably drive the tire. Rotate.

[0013] Compared to the prior art of tread positioning and rotational driving, since there is no pattern at the sub-port of the tire, the stability in the radial direction and the axial direction of the tire can be maintained during high-speed rotation without obvious entanglement. Movement and swing, thus helping to improve the quality of X-ray inspection imaging, and accordingly improve the quality of X-ray inspection.

[0014] In addition, the guide sleeve presses the sub-port of the tire, and the material difference between the material at the sub-port and the tread and the sidewall portion does not form a direct force transmission, so that the tread, The deformation of the sidewall and other parts, that is, does not affect the quality of X-ray inspection imaging. This is a significant improvement and improvement over the prior art technique of positioning and rotationally driving from the outside of the tread.

[0015] For the above-mentioned first driving device, there may be various driving and transmission mechanisms, such as motor reducer driving, cylinder, electric cylinder and cylinder driving, etc., such as timing belt-pulley transmission mechanism, and gear - Rack, screw-threaded transmission mechanism, will not be repeated and expanded here. [0016] Based on the object of the present invention and the above design concept, the preferred driving scheme is that the first driving device includes a first motor disposed on the frame, and an output shaft of the first motor passes through a set of pulleys and a first set of timing belts are drivingly connected to the first silk core, and the first screw thread sleeved on the first silk core is connected to the sliding frame;

The carriage is slidably coupled to the first rail by a first slider.

[0017] From a similar design perspective, a preferred second drive arrangement includes a second motor that is coupled to the guide sleeve pulley of the guide sleeve via a second set of pulleys and a second set of timing belt drive connections.

[0018] In order to further improve the convenience of the X-ray tube entering the inside of the tire from the sub-port, the structural design of the following expansion sub-port can be taken after the tire positioning is completed:

In the guide sleeve, a guide rod is coaxially arranged through the bearing;

a sliding key and a sliding groove are arranged between the guiding rod and the guiding sleeve and in the axial direction;

a side of the guide rod is provided with a retaining disc for expanding the tire sub-port, the other end of which is mounted on the rotating body, and the rotating body is disposed on a bracket through a rotating shaft;

The bracket reciprocates axially along the guide sleeve by the third driving device.

[0019] based on the expansion sub-port mechanism, the guide rod and the guide sleeve can rotate synchronously, or the guide rod can move axially relative to the guide sleeve to drive the end of the retaining disc to expand the tire sub-port axially outward, Provides a larger space to enter the inside of the tire from the X-ray tube.

[0020] A guide groove that is long in the axial direction may be disposed on the guide rod, and a sliding key inserted into the sliding groove is disposed on the guide sleeve, and the sliding key is also disposed along the axial direction.

[0021] When the guide sleeve rotates, the sliding slot is moved by the sliding button to drive the guiding rod to rotate synchronously;

When the guide rod moves linearly in the axial direction, the sliding button acts as a limiting block and a guiding block to maintain the stability of the axial movement of the guiding rod.

[0022] Of course, it is also possible to provide a guide groove that is long in the axial direction on the guide sleeve, and a sliding key that is inserted into the sliding groove is provided on the guide rod, and the interaction between the two is the same.

[0023] Since the axial linear motion of the guide rod is realized by the driving of the third driving device, and the bracket does not need to swing along the radial direction of the tire with the guide rod, in order to avoid the sudden death of the guide rod, the above need to be taken. The rotating body disposed between the side end of the guiding rod and the bracket drives the guiding rod to move linearly in the axial direction by the rotating body, and the rotating body rotates around the rotating shaft during the swinging of the guiding rod.

[0024] In order to counteract the stress influence of the swinging force transmitted from the side of the guide body on the bracket fixing structure, a feasible improvement measure may be that the axial distance between the shaft and the guide rod is linear, and the pin and the guide The axial distance between the sleeves is equal, that is, the swing radius of the guide rod body and the rotating body are equal. [0025] A preferred embodiment of the third driving device for the expansion sub-port mechanism is that the third driving device includes: the third motor is connected to the third group of timing belts to drive the third spring through the third group of pulleys, and the sleeve is set The third screw of the third wire is connected to the bracket; the bracket is slidably connected to the third rail by the third slider.

[0026]

Based on the above-described inventive design concept and structural improvement of the X-ray inspection machine, the present invention can also realize the following expansion tire rotation driving method:

Place the tire vertically on the guide sleeve,

Through the first driving device, the carriage moves in a straight line to realize that the connecting rod swings around its axis to drive the guiding rod body to swing along the tire radial direction, and the guiding sleeve presses the sub-port from the inside to the outside to position the tire;

The X-ray tube enters the inside of the tire from the spigot;

The guide sleeve drives the tire to rotate in the axial direction under the drive of the second drive.

[0027] wherein, the steps for implementing the expansion port of the X-ray tube from the sub-port into the interior of the tire are:

Driven by the third drive, the guide rod moves axially along the guide sleeve, and the retaining disc expands the tire nipple outwardly to allow the X-ray tube to enter the interior of the tire.

[0028] At the same time, the guide rod is synchronously rotated by the guide sleeve by the sliding key disposed along the axial direction;

During the swinging of the guide body along the tire radial direction, the guide rod drives the rotating body to swing synchronously with respect to the bracket.

[0029] In order to further avoid stress damage between the swinging mechanism and the fixed connection and the axial driving mechanism, the axial distance between the rotating shaft and the guiding rod, the pin shaft and the guiding sleeve can be set equally to achieve The guiding rod body and the rotating body have the same turning radius.

[0030]

As described above, the X-ray inspection machine of the present invention and its tire-expanding rotary driving method have the following advantages:

1. The method of expanding the centering tire from the sub-port and driving the rotation can effectively improve the stability of the tire when rotating at a high speed, thereby improving the quality of the X-ray inspection image.

[0031] 2. Based on the inspection means for pressing and rotating driving at the sub-port, the deformation of the inspected area (tread and sidewall) of the tire can be significantly reduced, thereby directly improving the quality and efficiency of the X-ray inspection.

[0032] 3, the realization of the sub-port expansion to facilitate the entry of the X-ray tube structure and method, so that the X-ray tube positioning and access mode is simplified, and there is room for choice, and a larger volume, higher imaging X-ray tube.

DRAWINGS

[0033] The present invention will be further described with reference to the accompanying drawings:

Figure 1 is a schematic structural view of the X-ray inspection machine;

Figure 2 is a side elevational view of Figure 1; Figure 3 is a schematic structural view of a rotating portion of a tire expansion;

Figure 4 is a side elevational view of Figure 3;

Figure 5 is a schematic plan view of Figure 3;

Figure 6 is a schematic structural view of the expansion sub-portion;

Figure 7 is a schematic structural view of the downward portion of Figure 6;

As shown in Figure 1 to Figure 7, lead room 1, X-ray motion device 2, imaging system motion device 3, tire expansion rotary drive 4, frame 5, guide body 6, guide sleeve 7, connecting rod 8, pin 9, mounting bracket 10, guide rod 11, sliding key 12, chute 13, retaining disc 14, rotating body 15, shaft 16, bracket 17, carriage 18, X-ray tube 20, detector 30;

a third motor 60, a third set of pulleys 61, a third set of timing belts 62, a third spring 63, a third screw 64, a third slider 65, a third rail 66;

a second motor 70, a second set of pulleys 71, a second set of timing belts 72, a guide sleeve pulley 73;

The first motor 80, the first set of pulleys 81, the first set of timing belts 82, the first springs 83, the first screws 84, the first sliders 85, and the first rails 86.

detailed description

[0034] Embodiment 1, as shown in FIG. 1 to FIG. 7, the X-ray inspection machine includes:

Lead room 1, used to provide a closed environment to detect tires;

X-ray motion device 2, for conveying X-ray tube 20 to the tire sub-port to emit X-ray;

An imaging system moving device 3, configured to transport the detector 30 to one side of the tire to receive X-rays and image;

a tire expander rotary drive 4 for carrying a tire and driving the tire to rotate during the detection process, including

Rack 5, a seat is fixed at the bottom of the frame 5, a guide rail is arranged on the vertical surface of the support, and the following slide frame is fixed on the guide rail slider

18;

2 sets of guiding rods 6, the side portions of which are symmetrically mounted to the frame 5 through the mounting frame 10, each set of conductor bars 6 are vertically distributed; the guiding sleeve 7 is coaxially sleeved in the guiding rod body 6 through bearings for carrying The tire, pressing the tire sub-port and driving the tire to rotate; two symmetrically arranged connecting rods 8, each of which is disposed on the frame 5 through a fixed shaft, and one end of which is connected to the mounting bracket 10 by a constant connecting rod The pin 9 (that is, the swinging state of the mounting frame 10 can be changed by the pin 9 to indirectly control the swinging of the guiding rod body 6), and the other side end thereof is connected to the sliding frame 18;

The carriage 18 reciprocates linearly on the frame 5 by the first driving device; the first driving device includes a first motor 80 disposed on the frame 5, and the output shaft of the first motor 80 passes through the first group of pulleys 81. The first core 63 is drivingly coupled to the first set of timing belts 82. The top end of the first screw 84 sleeved on the first core 83 is coupled to the carriage 18; the carriage 18 is slidably coupled to the first slider 85. a guide rail 86; The first motor 80 drives the first wire 83 to realize the vertical movement of the first wire rod 84, thereby realizing the vertical movement of the carriage 18, and the carriage 18 drives the connecting rod 8 to swing, thereby realizing the two sets of guiding rods 6 to be placed in synchronization. Turn, realize the action of pressing the tire mouth to listen to the expansion tire;

a second driving device for connecting and driving the guide sleeve 7 to rotate in the axial direction to drive the tire to rotate; the second driving device includes: the second motor 70 drives the connecting sleeve through the second group of pulleys 71 and the second group of timing belts 72 a guide sleeve pulley 73 disposed on the guide sleeve; the guide rod 11 is coaxially sleeved in the guide sleeve 7 through the bearing; a sliding groove 13 is arranged along the axial direction of the guide rod 11, and a convex portion is arranged along the axial direction of the guide sleeve 7 The sliding key 12; the guiding rod 11 can realize the axial movement relative to the guiding sleeve 7 through the sliding key 12, and the axial rotation of the guiding sleeve 7;

A stopper 14 for expanding the tire sub-port is disposed at one end of the guide rod 11, and the other end is mounted on the rotating body 15, and the rotating body 15 is axially disposed on a bracket 17 through a rotating shaft 16; the bracket 17 is driven by the third The device reciprocates axially along the guide sleeve 7; wherein the linear distance between the shaft 16 and the guide rod 11 is linearly equal to the axial distance between the pin shaft 9 and the guide sleeve 7, so that the rotating body 15 can be guided. Synchronous swinging motion of the rod 11;

The third driving device includes: the third motor 60 is driven to connect the third core 63 by the third group of pulleys 61 and the third group of timing belts 62, and the third screw 64 sleeved on the third core 63 is connected to the bracket. 17; The bracket 17 is slidably coupled to the third rail 66 through the third slider 65.

[0035] The third motor 60 fixed on the bracket 17 drives the rotation of the third lead screw 64 to realize linear motion of the bracket 17 along the axial direction of the guide sleeve 7. The bracket 17 is connected to the hinge shaft through the rotating body 15 and the guide rod 11. The linear sliding of the guide rod 11 with respect to the axial direction of the guide sleeve 7 is realized, so that the retaining disc 14 can always expand the sub-port during the rotation of the tire to facilitate the entry and exit of the X-ray tube 20.

[0036]

Based on the use of the above X-ray inspection machine, the following expansion tire rotation driving method can be implemented:

Place the tire vertically on the guide sleeve 7,

Through the first driving device, the carriage 18 moves in a straight line to realize the swinging of the connecting rod 8 around its axis, so as to drive the guiding rod body 6 to swing in the tire radial direction, and the guiding sleeve 7 presses the sub-port from the inside to the outside to position the tire;

Under the driving of the third driving device, the guide rod 11 moves axially along the guide sleeve 7, and the retaining disc 14 expands the tire sub-port to the outside to allow the X-ray tube 20 to enter the inside of the tire;

The guide sleeve 7 drives the tire to rotate in the axial direction under the driving of the second driving device;

The guide rod 11 is synchronously rotated by the guide sleeve 7 by the sliding key 12 disposed along the axial direction;

During the swinging of the guide body 6 in the tire radial direction, the guide rod 11 drives the rotating body 15 to swing synchronously with respect to the bracket 17; the linear distance between the rotating shaft 16 and the guiding rod 11, the pin shaft 9 and the guide sleeve 7 is linearly set. Equal to achieve the guide body 6 and The swinging radius of the rotating body 15 is equal; the specific detection process is as follows:

After the tire specification is identified, the tire is centered and clamped and turned over by the turning device by a horizontal state by 90° to be vertical;

Transfer to the inspection station in the lead room 1;

The guide body 6 swings in the radial direction of the tire, and the guide sleeve 7 presses the sub-port from the inside to the outside to support and position the tire;

The guide rod 11 moves axially along the guide sleeve 7, and the retaining disc 14 expands the tire sub-port to the outside to allow the X-ray tube 20 to enter the inside of the tire; the imaged detector 30 and the X-ray tube 20 are automatically adjusted to the corresponding size according to the tire inspection size specification. Working position; the guide sleeve 7 drives the tire to rotate in the axial direction under the driving of the second driving device;

The X-ray tube 20 emits radiation, and the imaging system reduces the image of the internal structure of the tire by receiving X-rays transmitted through the tire; when the tire is detected once, the X-ray tube 20 stops the emission line, and the X-ray motion device 2 and the imaging system move Device 3 is reset,

The tire is sent out of the lead room, and the inspection process of one tire is completed.

Claims

1. An X-ray inspection machine comprising a lead chamber for sealing a tire (1), and the following device disposed in the lead room (1),

X-ray motion device (2) for conveying X-ray tube (20) to the tire mouth to emit X-ray;

An imaging system motion device (3) for transporting the detector (30) to one side of the tire to receive X-rays and to image;

a tire expanding rotary driving device (4) for carrying a tire and driving the tire to rotate during the detecting, characterized in that: the expanded tire rotating driving device (4) includes

Rack (5),

At least one set of guide rods (6), the side portions of which are mounted to the frame (5) through the mounting bracket (10);

a guide sleeve (7) is coaxially sleeved in the guide body (6) through a bearing to carry the tire, press the tire sub-port and drive the tire to rotate;

The connecting rod (8) has a central fixed shaft disposed on the frame (5), one side end of which is connected to a pin shaft (9) for pivoting the mounting frame (10), and the other side end is connected to the sliding frame (18) );

a carriage (18), reciprocating linear motion on the frame (5) by the first driving device;

A second driving device for connecting and driving the guide sleeve (7) to rotate in the axial direction to drive the tire to rotate.

2.

The X-ray inspection machine according to claim 1, wherein: said first driving device comprises: a first motor (80) disposed on the frame (5), and an output shaft of the first motor (80) Passing the first set of pulleys (81) with the first set of timing belts

(82) driving the first nut (83), the first screw (84) sleeved on the first nut (83) is connected to the carriage

(8);

The carriage (18) is slidably coupled to the first rail (86) by a first slider (85).

3.

The X-ray inspection machine according to claim 2, wherein: said second driving means comprises: second motor (70) passing through said second set of pulleys (71) and said second set of timing belts (72) The drive connection sleeve is sleeved on the guide sleeve pulley (73) of the guide sleeve (7).

4.

The X-ray inspection machine according to claim 1, 2 or 3, characterized in that: in the guide sleeve (7), a guide rod (11) is coaxially fitted through the bearing,

Between the guide rod (11) and the guide sleeve (7), a sliding key (12) and a sliding groove (13) are arranged in the axial direction;

A retaining disc (14) for expanding the tire sub-port is disposed at one end of the guide rod (11), and the other end is mounted on the rotating body (15), and the rotating body (15) is disposed on the shaft through a rotating shaft (16) a bracket (17);

The bracket (17) is axially reciprocated along the guide sleeve (7) by a third driving device.

5.

The X-ray inspection machine according to claim 4, characterized in that: a linear distance between the axis of rotation of the rotating shaft (16) and the guide rod (11), and an axis between the pin shaft (9) and the guide sleeve (7) The heart is equidistant from each other.

6.

The X-ray inspection machine according to claim 5, wherein: said third driving means comprises: a third motor (60) passing through the third set of pulleys (61) and the third set of timing belts (62) The driving is connected to the third nut (63), and the third screw (64) sleeved on the third nut (63) is connected to the bracket (17);

The bracket (17) is slidably coupled to the third rail (66) through the third slider (65). The method of expanding the tire rotation of the X-ray inspection machine according to any one of claims 1 to 6, characterized in that: the tire is vertically placed on the guide sleeve (7),

Through the first driving device, the carriage (18) moves in a straight line to realize that the connecting rod (8) swings around its axis to drive the guiding rod body (6) to swing in the tire radial direction, and the guiding sleeve (7) is from the inside to the outside. Pressing the sub-port to position the tire;

X-ray tube (20) enters the inside of the tire from the spigot;

The guide sleeve (7) drives the tire to rotate in the axial direction under the drive of the second drive.

8.

The method according to claim 7, wherein the guide rod (11) is axially moved along the guide sleeve (7) and the retaining plate (14) is extended to the outside by the third driving device. The sub-port allows the X-ray tube (20) to enter the interior of the tire.

9.

The tire expanding rotary driving method according to claim 8, wherein: the guide rod (11) is synchronously rotated by the guide sleeve (7) by the sliding key (12) disposed in the axial direction;

When the guide body (6) swings in the radial direction of the tire, the guide rod (11) drives the rotating body (15) to swing synchronously with respect to the bracket (17).

10.

The tire expanding rotary driving method according to claim 9, characterized in that: the linear distance between the rotating shaft (16) and the guide rod (11), the pin shaft (9) and the guide sleeve (7) is set to be equal , to achieve the swing radius of the guide body (6) and the rotating body (15).