X-ray detection device for tire
Technical Field
The utility model relates to an adopt X ray to carry out the device that detects to tire belongs to rubber machinery.
Background
In order to improve the production quality and the safe service life of the automobile tire, a series of online detection items are required in the manufacturing process. If the inner layer of the tire is detected by X-rays, the signals generated by the rays penetrating through the tire are fed back to form images on a receiving device, and then whether the performance defects such as faults, bubbles, steel wire breakage and the like occur in the tire is verified, and the tire is identified and graded according to the inspection result.
The existing X-ray flaw detection device and method vertically place the tire to be detected on a conveying line, and drive an X-ray tube to extend into the opening to perform ray image taking.
Because the weight of the tire is large, such as various engineering tires, heavy duty tires and the like, the tire placed on the conveying line is locally deformed to a certain degree due to the dead weight of the tire, and therefore the accuracy of X-ray detection data is directly influenced.
Meanwhile, in the detection process, the tire is relatively static, and data signals of all parts of the tire can be received in all directions only by rotating and driving the X-ray transmitting device, so that the structure of the X-ray transmitting and receiving device is complex, the detection period is too long, and the cost of the whole detection device is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a tire X light detection device takes the well check out mode of deciding with the tire is hung perpendicularly, is detected the tire and carries out incessant constant speed rotation around its central axis among the X ray emission process, and signal detector is around the outside rotatory swing of tire in order to receive the X ray signal that pierces through the tire.
The utility model discloses a design aim at, X ray pierce through each position of tire circumference uniformly, and the tire can not local deformation to improve X-ray detection data's accuracy effectively.
Another design purpose is that the tire can be lifted and positioned at the central position of the detection station, the structure of the X-ray transmitting and receiving device is simplified, and the manufacturing cost of the whole detection device is reduced.
The design aim is also to adapt to tires with different shapes and section width specifications, and the tire detection period is effectively shortened.
In order to achieve the above design purpose, the tire X-ray detection device mainly comprises:
a lead room, an X-ray emitting device, an X-ray receiving device and a centering rotating device are arranged in the lead room,
the X-ray receiving device is connected with the data processing system through a data line. Wherein,
the X-ray emitting device is provided with a fixed frame, a driving mechanism for driving the X-ray tube to do reciprocating motion is arranged on the fixed frame, and the driving mechanism controls the X-ray tube to extend into the inner part of the sub-opening of the tire to be detected.
The X-ray signal emitted by the X-ray tube and capable of penetrating the tested tire is received by the X-ray receiving device.
The X-ray receiving device is provided with a rotary swing mechanism arranged on the supporting frame, and the rotary swing mechanism drives the signal detector to rotate along the directions of the tire side, the tire tread and the tire side of the detected tire in sequence so as to receive X-ray signals.
The centering rotating device is provided with an upper cross beam, a transmission mechanism driven by a servo motor is arranged on the upper cross beam, and the transmission mechanism is downwards connected with a group of centering support arms for supporting the tested tire.
As characterized by the above basic solution, on-line X-ray detection can be completed according to the specification and the size of the tire so as to detect flaws aiming at faults inside the tire
The X-ray tube extends into the tire bead to emit X-rays, the X-rays penetrate through the tire and generate X-ray signals with different intensities, and the X-ray signals are transmitted to the data processing system through the X-ray receiving device to form a cross-section image.
And judging and grading the tire fault quality according to the image result obtained by the detection.
In order to improve the reception quality and the range of the X-ray signals, the improvement of the X-ray receiving device is,
the rotary swing mechanism of the X-ray receiving device comprises a servo motor reducer which is in driving connection with a driving synchronous belt wheel, and the driving synchronous belt wheel is connected with a driven synchronous belt wheel through a synchronous belt.
The driven synchronous pulley is sleeved on a signal detector fixed on the supporting frame.
Through above-mentioned rotatory swing mechanism, can reply the great tire detection demand of various section width sizes, signal detector is driven and outside the tire, along the side wall, tread and side wall rotatory swing in proper order, and the rotation angle can be greater than 180, pertinence regulation signal detector's rotation angle.
In order to adapt to tires with different external dimensions, the X-ray receiving device is provided with a transverse driving unit and a longitudinal driving unit which respectively drive the signal detector, and reciprocate along the transverse direction and the longitudinal direction of the tire to be detected.
Through the driving unit, the detector can be accurately controlled and driven to move transversely and longitudinally according to the section widths and the outer diameter size requirements of tires with different specifications, and the positioning of the signal detector is accurate.
In order to improve the uniformity of X-ray emission and penetration through tires and adapt to the detection requirements of tires with different specifications, the improvement proposal of the X-ray emission device is that,
the driving mechanism of the X-ray emitting device is provided with a driving unit which drives the X-ray tube to respectively realize reciprocating motion along the radial direction and the vertical direction of the tested tire.
The cross section widths of tires with different specifications are different, and the X-ray tube can be adjusted and positioned at the center of the tire seam allowance through the driving unit so as to generate an optimal image for detecting the tire fault structure.
In order to improve the detection method of the vertical hanging tire and avoid influencing the accuracy of X-ray detection data due to the local deformation of the tire, the following improvement scheme can be adopted for the centering rotating device,
and a linear guide rail is arranged on the upper cross beam of the centering rotating device.
The transmission mechanism comprises a pair of servo motors, the driving shafts of 2 servo motors are respectively connected with a ball screw, and a nut sleeved on the ball screw is fixed on a sliding block.
The upper ends of the supporting frames of the centering support arms are respectively and fixedly connected with the slide blocks, and the lower ends of the supporting frames are respectively provided with a group of horizontal suspension arms for supporting the tested tire.
The centering rotating device is used for conveying the tire to be detected to the detecting station, and carrying the tire and simultaneously realizing the constant-speed rotation of the tire around the central axis of the tire so as to carry out the X-ray detection in the circumferential direction.
A group of centering support arms are controlled by 2 servo motors, so that the 2 centering support arms can move oppositely independently and can also move oppositely at the same time. The linear guide rail is adopted for guiding, and the stability of the linear motion of the 2 centering support arms can be ensured.
In order to improve the fact that the tire rotates in the circumferential direction at a constant speed under the driving of the centering support arm, the lower end of the centering support arm on one side is provided with 2 suspension arms which are arranged in parallel, and the 2 suspension arms are connected with a rotating speed reduction motor through a double-output-shaft transmission mechanism.
According to the external dimensions of the tires with different specifications, a lifting device can be arranged for accurately controlling and driving the centering support arm to drive the tire to be detected to move to the central position of the detection station along the vertical direction.
The lifting device is provided with linear guide rails with two vertical sides. A transverse lifting frame driven by a transmission mechanism is connected between the linear guide rails, and an upper cross beam of the centering rotating device is fixedly connected to the lifting frame.
To sum up, the utility model has the advantages of it is following and beneficial effect:
1. the novel online X-ray detection method is realized, the local deformation of the tire body caused by the dead weight of the tire can not be caused when the tire is hung for detection, and the accuracy of X-ray detection data can be ensured.
2. The tire vertically hung to the detection station rotates at a constant speed, so that the accuracy of the detection data of the tire in the circumferential direction can be improved.
3. The structure of the X-ray transmitting and receiving device is simpler, so that the manufacturing cost of the whole detection device is reduced.
4. The tire inspection device can meet the tire inspection requirements of various different shapes and section width specifications, and the inspection period is effectively shortened.
Drawings
The present invention will now be further described with reference to the accompanying drawings;
FIG. 1 is a schematic structural view of an X-ray detecting device for a tire according to the present invention;
FIG. 2 is a schematic view of an X-ray emitting device;
FIG. 3 is a top view of the structure of FIG. 2;
FIG. 4 is a schematic view of an X-ray receiving device;
FIG. 5 is a schematic top view of the X-ray receiving device;
FIG. 6 is a side schematic view of an X-ray receiving device;
FIG. 7 is a schematic view of the structure of the centering rotating means;
FIG. 8 is a top down schematic view of the centering rotating device;
fig. 9 is a schematic structural view of the lifting device.
As shown in fig. 1 to 9, a lead room 1, an X-ray emitting device 2, an X-ray receiving device 3, a centering rotating device 4, a lifting device 5, and a tire 6;
a fixed frame 21, an X-ray tube 22, a driving mechanism 23, a servo motor 231, a screw rod driving unit 232, a slide block 233, a servo motor 234, a screw rod driving unit 235 and a guide rail 236;
the device comprises a support frame 31, a signal detector 32, a rotary swing mechanism 33, a driving synchronous pulley 332, a servo motor reducer 331, a synchronous belt 333, a driven synchronous pulley 334, a transverse driving unit 34, a screw rod driving unit 342, a servo motor 341, a longitudinal driving unit 35, a slide block 353, a screw rod driving unit 352, a servo motor 351 and a guide rail 354;
an upper beam 41, a linear guide rail 411, a slide block 412, a servo motor 42, a ball screw 421, a nut 422, a centering arm 43, a support frame 431, a suspension arm 432, a centering arm 44, a support frame 441, a suspension arm 442, a rotation speed reduction motor 45 and a double-output-shaft transmission mechanism 451;
the linear guide rail 51, the lifting frame 52, the servo motor 53, the driving bevel gear 54, the driven bevel gear 55, the ball screw 56 and the nut 57.
Pointing to a in fig. 3 is the detection position where the X-ray tube 22 enters inside the tire bead.
Detailed Description
In embodiment 1, as shown in fig. 1, the tire X-ray inspection apparatus includes an X-ray emitting device 2, an X-ray receiving device 3, a centering rotation device 4, and an elevating device 5, which are provided inside a lead room 1. Wherein,
the X-ray receiving device 3 is connected with a data processing system through a data line to complete online detection. According to the X-ray image of tyre fault displayed and recorded in computer terminal, the defects of air bubble, steel wire break, steel wire maldistribution, tear and impurity in the tyre are tested, and the tyre is judged and calibrated according to the test result.
The X-ray emission device 2 has a fixing frame 21, and a driving mechanism 23 for driving the X-ray tube 22 to reciprocate is arranged on the fixing frame 21. The driving mechanism 23 controls the X-ray tube 21 to extend into the inner part of the sub-opening of the tested tire, and the X-ray signal which is emitted by the X-ray tube 22 and can penetrate through the tested tire is received by the X-ray receiving device 3.
The driving mechanism 23 has 2 mutually independent driving units for driving the X-ray tube 22 to reciprocate along the radial direction and the vertical direction of the tire to be detected.
The servomotor 231 drives the lead screw driving unit 232, the X-ray tube 22 is fixedly connected to the front end of the lead screw driving unit 232, and the lead screw driving unit 232 is engaged with a slider 233.
The slider 233 is fixed to a screw driving unit 235 of another driving unit, the screw driving unit 235 is driven by a servo motor 234, and a guide rail 236 is connected to one side of the screw driving unit 235.
The X-ray receiving device 3 has a rotary swing mechanism 33 mounted on the support frame 31.
The rotary swing mechanism 33 drives the signal detector 32 to rotate along the direction of the sidewall, tread and sidewall of the tested tire in sequence so as to receive the X-ray signal.
The rotary swing mechanism 33 of the X-ray receiving apparatus 3 includes a servomotor reducer 331 drivingly connected to a driving timing pulley 332, and the driving timing pulley 332 is connected to a driven timing pulley 334 through a timing belt 333.
And the driven synchronous pulley 334 is sleeved on the signal detector 32 fixed on the support frame 31.
The X-ray receiving device 3 has a lateral driving unit 33 and a longitudinal driving unit 34 for driving the signal detector 32 to reciprocate in the lateral and longitudinal directions of the tire to be tested, respectively.
The support frame 31 is connected to the screw rod driving unit 332 of the transverse driving unit 33, and the servo motor 331 drives the screw rod driving unit 332 to reciprocate along the transverse direction of the tested tire;
the transverse driving unit 33 is integrally connected to a slider 343 of the longitudinal driving unit 34, a lead screw driving unit 342 is driven by a servo motor 341 and engages with the slider 343, and a guide 344 is connected to one side of the lead screw driving unit 342.
The centering and rotating device 4 has an upper beam 41, and a set of linear guide rails 411 are arranged on the upper beam 41.
A transmission mechanism driven by a servo motor 42 is provided on the upper cross member 41, and the transmission mechanism is connected downward with a set of centering arm 43 and centering arm 44 for supporting the tire to be tested.
The transmission mechanism comprises a pair of servo motors 42, the driving shafts of 2 servo motors 42 are respectively connected with a ball screw 421, and nuts 422 sleeved on the ball screws 421 are fixed on the sliding blocks 412.
The upper ends of the support frame 431 and the support frame 441 are connected to the slider 412, respectively.
At the lower end of the support 431, 2 parallel suspension arms 432 are provided, and at the lower end of the support 441, 2 parallel suspension arms 442 are provided.
The 2 booms 432 are connected to the rotation reduction motor 45 through a dual output shaft transmission mechanism 451.
The lifting device 5 has linear guide rails 51 with two perpendicular sides. A transverse lifting frame 52 driven by a transmission mechanism is connected between the linear guide rails 51, and the upper cross beam 41 is fixedly connected to the lifting frame 52.
An output shaft of the servo motor 53 is connected with a driving bevel gear 54, the driving bevel gear 54 is engaged with and drives a driven bevel gear 55, the driven bevel gear 55 is connected with a ball screw 56 to rotate together, and a nut 57 is fixedly connected on the linear guide rail 51.
The scheme of the embodiment is applied to realize the tire X-ray detection method, and specifically:
the tyre 6 is conveyed into the lead chamber 1.
The X-ray emitting device 2 emits X-rays, the X-rays penetrating different parts of the tire form detection data signals and are received by the X-ray receiving device 3, and the X-ray signals are transmitted to the data processing system to be restored into detection images which are used as bases for detection, classification and calibration of the tire 6.
The X-ray tube 22 is fed to the inside of the sub-port of the tire 6 under test and emits X-rays, during which the tire 6 under test is rotated on the centering arms 43 and 44 at a constant speed without interruption about its central axis.
The signal detector 32 of the X-ray receiving device 3 rotates and swings around the sidewall, tread, and sidewall directions in sequence outside the tire 6 to receive the X-ray signal penetrating the tire 6.
The angle of the rotational oscillation of the signal detector 32 about the tire being tested is greater than 180.
Under the driving of the transverse driving unit 33 and the longitudinal driving unit 34, the transverse and longitudinal distances between the signal detector 32 and the tested tire can be adjusted. According to the tire section width and the outer diameter size of different specifications, the signal detector 32 can realize accurate positioning through transverse and longitudinal movement and rotary swing, and received signals are complete and have signal strength suitable for imaging.
The radial and vertical distances between the X-ray tube 22 extending into the interior of the sub-opening and the tire to be tested can be adjusted by the driving mechanism 23. According to the section width size of the tires 6 with different specifications, the X-ray tube 22 is adjusted to move and be positioned to the central position of the rim of the tire 6, so that the X-rays penetrating through the tire 6 are uniformly distributed, and the quality of a detection signal image can be improved.
Before the X-ray tube 22 is conveyed into the tire opening, the lifting device 5 lifts the tire 6 to be detected along the linear guide rails 51 on both sides thereof to the detection station of the X-ray detection device together with the centering rotary device 4.
According to different specifications and sizes of the tested tire 6, the servo motor 53 can accurately control the driving bevel gear 54, and sequentially drive the driven bevel gear 55, the ball screw 56 and the nut 57 through the driving bevel gear 54, so as to realize the adjustment of the ascending and descending distances of the tire 6 carried by the centering support arm 43 and the centering support arm 44.