CN113866267B - Ultrasonic detection device for flash of die-pressed composite product and control method - Google Patents
Ultrasonic detection device for flash of die-pressed composite product and control method Download PDFInfo
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- CN113866267B CN113866267B CN202111084126.8A CN202111084126A CN113866267B CN 113866267 B CN113866267 B CN 113866267B CN 202111084126 A CN202111084126 A CN 202111084126A CN 113866267 B CN113866267 B CN 113866267B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000000523 sample Substances 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000000465 moulding Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims description 34
- 238000010168 coupling process Methods 0.000 claims description 34
- 238000005859 coupling reaction Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 24
- 230000000007 visual effect Effects 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 2
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- 238000007723 die pressing method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/225—Supports, positioning or alignment in moving situation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
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Abstract
The invention relates to the technical field of composite material products, in particular to a die pressing composite material product flash ultrasonic detection device and a control method. Including die press (16), set up mould (15) in die press (16), its characterized in that: the ultrasonic device further comprises a controller, a triaxial moving mechanism detachably connected to the molding press (16), an ultrasonic probe arranged on the triaxial moving mechanism and a sensor arranged on the triaxial moving mechanism, wherein the ultrasonic probe and the sensor are connected with the controller through signals. The device and the method can be used for detecting the flash in the process of producing the composite material product by mould pressing.
Description
Technical Field
The invention relates to the technical field of composite material products, in particular to a die pressing composite material product flash ultrasonic detection device and a control method.
Background
From the current situation and development trend of the light-weight materials at home and abroad, the composite material (glass fiber, carbon fiber and the like) has the advantages in the aspects of light weight, high strength, high elastic modulus, impact resistance, shock absorption and sound insulation performance, corrosion resistance and the like, and has a trend of increasing year by year in industrial application.
Compression molding refers to a molding process in which a molding material is placed in a metal mold and cured under pressure at a certain temperature to form a molded product. The compression molding method can produce composite material compression molded products with low cost, high productivity and stability.
However, in the compression molding process, after the upper and lower dies are clamped, a pressure maintaining process is performed for a period of time, and in the process, an operator cannot intuitively observe whether flash is generated on the molded product. Thus, certain difficulties arise in reasonably selecting and adjusting various molding process parameters and press operating conditions in real time. In view of the foregoing, it is desirable to provide an apparatus and control method for detecting flash during the molding process of composite products.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the device and the method can be used for detecting the flash in the process of producing the composite material product by mould pressing.
The technical scheme adopted by the invention is as follows: the utility model provides a mould pressing composite product overlap ultrasonic detection device, includes the mould press and sets up the mould in the mould press, and it still includes controller, detachable triaxial moving mechanism who connects on the mould press, sets up the ultrasonic probe on triaxial moving mechanism and sets up the sensor on triaxial moving mechanism, ultrasonic probe, sensor all are connected with the controller signal.
Preferably, the three-axis moving mechanism comprises an X-axis moving assembly, a Y-axis moving assembly and a Z-axis moving assembly, wherein the X-axis moving assembly is a horizontal screw shaft and a horizontal screw pair, the Z-axis moving assembly is a vertical screw shaft and a vertical screw pair, the Y-axis moving assembly is a multi-stage hydraulic rod, the ultrasonic probe and the sensor are arranged at one end of the multi-stage hydraulic rod, and the horizontal screw pair is arranged at the other end of the multi-stage hydraulic rod.
Preferably, the automatic spraying coupling liquid mechanism is also included, and is in signal connection with the controller,
And the automatic coupling liquid spraying mechanism is used for automatically spraying coupling liquid when the ultrasonic probe moves on the surface of the die.
Preferably, the triaxial moving mechanism is detachably connected to the molding press through a magnetic adsorption mechanism.
Preferably, the sensor comprises a visual positioning sensor, a distance sensor and a pressure sensor, and the ultrasonic probe is an ultrasonic oblique probe, wherein:
Visual positioning sensor: the ultrasonic probe is used for positioning and tracking a scanning path of the ultrasonic oblique probe;
Distance sensor: the ultrasonic inclined probe is used for detecting the distance between the ultrasonic inclined probe and the outer surface of the die;
a pressure sensor: the ultrasonic inclined probe is fixed on the same plane with the ultrasonic inclined probe and is used for detecting the coupling pressure between the ultrasonic inclined probe and the outer surface of the die;
And the center of the visual field of the visual positioning sensor and the center of the ultrasonic inclined probe are positioned at the same horizontal plane.
The invention adopts another technical scheme that: a control method of a die-pressing composite product flash ultrasonic detection device comprises the following steps:
S1, setting dwell time t1, setting ultrasonic detection paths and flash parameters according to a die to be pressed, and then moving an ultrasonic probe to an initial position through a triaxial moving mechanism;
s2, pressing by a die press, and maintaining pressure after the pressing is finished;
s3, after pressure maintaining starts, the triaxial moving mechanism drives the ultrasonic probe to detect along a detection path set in S1, and when the existence of the flash set in S1 is detected, the next step is skipped; if the flash is not detected after the time t1, jumping to the next step;
S4, pressure release of the molding press.
Preferably, the step S1 needs to set the coupling pressure P2, and the step S3 needs to control the multi-stage hydraulic rod to drive the ultrasonic probe to move along the Y axis, and when the distance between the ultrasonic probe and the mold is detected to be 0 by the distance sensor, control the multi-stage hydraulic rod to continuously pressurize until the pressure detected by the pressure sensor is greater than or equal to the coupling pressure P2, the multi-stage hydraulic rod stops pressurizing and keeps the current pressure.
Preferably, when the ultrasonic probe in step S3 performs movement detection along the detection path set in step S1, the automatic coupling liquid spraying mechanism sprays the coupling liquid on the detection surface of the ultrasonic probe at the same time.
Preferably, in step S3, the oblique beam method is used to detect flash: if the sound wave does not encounter flash in the advancing process, reflected echoes appear at corresponding sound path positions; if the flash is encountered, the flash plays a role of a coupling agent, sound waves penetrate through the flash and are injected into the lower die, and echo signals are obviously weakened.
Preferably, step S3 obtains an echo signal when detecting the flash, and then adjusts the dwell time t1 according to the magnitude of the echo signal.
Compared with the prior art, the invention has the following advantages: the ultrasonic detection device can be quickly installed and detached, and can be used for detecting the flash of the composite material in real time in the pressure maintaining process of the die through automatic control. Ultrasonic testing is performed during the process of molding the product by the mold. An operator can detect whether the composite material product has flash in real time in the pressure maintaining process. Meanwhile, the real-time detection result can be fed back to a press control system, so that closed-loop control of the dwell time is realized. Thus, various process parameters and press operating conditions are reasonably selected and adjusted, thereby improving the quality of the molded product.
Drawings
FIG. 1 is a schematic diagram of an ultrasonic testing device according to the present invention.
Fig. 2 is an exploded schematic view of the ultrasonic probe and sensor mounting structure of the present invention.
FIG. 3 is a schematic view of the installation of the ultrasonic testing device of the present invention.
FIG. 4 is a schematic diagram of an ultrasonic testing process according to the present invention.
Wherein, 1, a magnetic adsorption mechanism; 2. a vertical screw servo motor; 3. a horizontal screw servo motor; 4. a vertical screw shaft; 5. a vertical screw pair; 6. a horizontal screw shaft; 7. a cross beam; 8. a horizontal screw pair; 9. a linear guide rail; 10. a linear rolling guide rail pair; 11. a fixing seat; 12. a multi-stage hydraulic lever; 13. a coupling liquid automatic spraying mechanism; 14. an ultrasonic mounting assembly; 14.1, a clamping mechanism; 14.2, a visual positioning sensor; 14.3, a distance sensor; 14.4, a pressure sensor; 14.5, an ultrasonic inclined probe; 14.6, an ultrasonic detector; 15. a mold; 15.1, upper die; 15.2, lower die; 15.3, mould pressing cavity; 15.4, heating oil heat conduction channels; 15.5, composite article; 15.6, flashing; 16. a molding press; 16.1, a hydraulic cylinder; 16.2, a workbench; 16.3, stand columns; 16.4, guide rails; 16.5, a middle beam; 16.6, upper cross beam.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Embodiment one:
the whole set of detection equipment comprises a controller, a molding press 16, a mold 15 and an ultrasonic detection device, wherein:
The controller comprises an STM32 singlechip, can realize communication with the visual positioning sensor 14.2, the distance sensor 14.3 and the pressure sensor 14.4, and controls the vertical screw servo motor 2, the horizontal screw servo motor 3 and the automatic spraying coupling liquid mechanism 13.
The mould 15 comprises an upper mould 15.1, a lower mould 15.2, a mould pressing cavity 15.3 and a heating oil heat conducting channel 15.4, and a composite product 15.5 is obtained through the mould, and the composite product 15.5 generates flash 15.6 in the pressing process.
The molding machine 16 mainly comprises a hydraulic cylinder 16.1, a workbench 16.2, an upright post 16.3, a guide rail 16.4, a middle beam 16.5 and an upper cross beam 16.6. The upright 16.3 is forged from a metallic iron alloy. The upper die 15.1 is fixed on the center sill 16.5, and the lower die 15.2 is fixed on the workbench 16.2. The hydraulic cylinder 16.1 drives the center sill 16.5 to move in the vertical direction, so that the die 15 is opened and closed.
The ultrasonic detection device comprises a triaxial moving mechanism, a magnetic adsorption mechanism 1 and an ultrasonic installation assembly 14, wherein:
The three-axis moving mechanism comprises a vertical screw servo motor 2, a horizontal screw servo motor 3, a vertical screw shaft 4, a vertical screw pair 5, a horizontal screw shaft 6, a cross beam 7, a horizontal screw pair 8, a linear guide rail 9, a linear rolling guide rail pair 10, a fixed seat 11 and a multi-stage hydraulic rod 12, wherein the horizontal screw servo motor 3, the horizontal screw shaft 6 and the horizontal screw pair 8 form an X-axis moving assembly, the multi-stage hydraulic rod 12 forms a Y-axis moving assembly, and the vertical screw servo motor 2, the vertical screw shaft 4 and the vertical screw pair 5 form a Z-axis moving assembly; the two ends of the vertical screw shaft 4 and the linear guide rail 9 are respectively arranged on the fixed seat 11 and are connected with the molding press 16 through the magnetic adsorption mechanism 1; both ends of the horizontal screw shaft 6 are respectively connected with the vertical screw pair 5 and the linear rolling guide rail pair 10. The horizontal screw rod servo motor 3 and the vertical screw rod servo motor 2 are respectively connected with the horizontal screw rod shaft 6 and the vertical screw rod shaft 4 through a coupler, and two grooves are respectively formed in the upper surface and the lower surface of the cross beam 7, so that the horizontal screw rod pair 8 drives the multi-stage hydraulic rod 12 to move in the horizontal direction; the vertical screw pair 5 can drive the horizontal screw shaft 6 to move in the vertical direction; the multistage hydraulic rod 12 can drive the ultrasonic installation assembly 14 to move horizontally and axially perpendicular to the horizontal screw shaft 6. This achieves a triaxial movement.
The ultrasonic installation assembly 14 and the horizontal screw pair 8 are respectively fixed at two ends of the multi-stage hydraulic rod 12 and comprise a clamping mechanism 14.1, a visual positioning sensor 14.2, a distance sensor 14.3, a pressure sensor 14.4, an ultrasonic inclined probe 14.5, an ultrasonic detector 14.6 and an automatic spraying coupling liquid mechanism 13. The clamping mechanism 14.1 is connected to the multi-stage hydraulic lever 12. The visual positioning sensor 14.2, the distance sensor 14.3, the pressure sensor 14.4 and the ultrasonic inclined probe 14.5 are fixed by a clamping mechanism 14.1.
The automatic spraying coupling liquid mechanism 13 comprises a coupling liquid accommodating device which is fixed on the horizontal screw pair 8 and is connected with the clamping mechanism 14.1 through a conduit, and the coupling liquid accommodating device is also connected with a controller, and the controller is used for controlling whether the coupling liquid accommodating device releases the internal coupling liquid or not;
The clamping mechanism 14.1 is used for clamping and fixing the visual positioning sensor 14.2, the distance sensor 14.3, the pressure sensor 14.4 and the ultrasonic inclined probe 14.5, and is connected with the multi-stage hydraulic rod 12. And the clamping mechanism 14.1 is internally provided with a coupling liquid channel which is communicated with the groove on the surface; thus when the controller controls the coupling liquid containing means to release the coupling liquid, the coupling liquid will flow out of the coupling liquid channel on the clamping mechanism 14.1.
The visual positioning sensor 14.2 is used for positioning and tracking a scanning path of the ultrasonic inclined probe 14.5, and the center of the visual field of the visual positioning sensor 14.2 and the center of the ultrasonic inclined probe 14.5 are positioned at the same horizontal plane;
The distance sensor 14.3 is used for detecting the distance between the ultrasonic inclined probe 14.5 and the outer surface of the die 15, and the relative height between the distance sensor 14.3 and the surface of the ultrasonic inclined probe 14.5 is p;
The pressure sensor 14.4 is fixed on the same plane with the ultrasonic inclined probe 14.5 and is used for detecting the coupling pressure between the ultrasonic inclined probe 14.5 and the outer surface of the die 15;
the ultrasonic inclined probe 14.5 can select a proper nominal K value model, so as to adapt to the structural characteristics of different dies 15;
the ultrasonic detector 14.6 is configured to detect the ultrasonic reflected echo received by the ultrasonic probe 14.5 and display a corresponding characteristic image.
The detection control method of the whole set of detection equipment comprises the following steps:
S1, preparation before pressing. And (3) turning on a conduction oil heating switch to set the temperatures of the upper die and the lower die to target values T1 and T2 respectively. After a period of time, the mold temperature sensor detects that the surface temperatures of the upper mold and the lower mold reach target values T1 and T2 respectively. Thoroughly cleaning a die, spraying a release agent, and uniformly coating the release agent with clean gauze before feeding; meanwhile, parameters of an ultrasonic detection path and flash are set according to the die, and then the vertical screw servo motor and the horizontal screw servo motor drive the multistage hydraulic rod to move to set initial positions according to position information fed back by the visual positioning sensor;
S2, cutting materials and layering. Removing the upper and lower films of the cut molding raw material sheet, moving the film into a molding cavity, and arranging and layering according to the shape of the molding cavity;
s3, pressure maintaining molding. Starting the press, and driving the upper die to quickly descend by the hydraulic cylinder. When the upper die moves to the die pressing raw material sheet and is in close contact with the lower die, the press is pressurized and maintains the preset forming pressure P1;
S4, ultrasonic detection. When the upper die moves to the state that the die pressing raw material sheet is in close contact with the lower die in the step S3, the multistage hydraulic rod drives the ultrasonic installation component to be closely attached to the outer surface of the die, and the ultrasonic installation component is pressurized to a preset coupling pressure P2. Preferably, P2 ranges from 10 to 25N. The controller drives the horizontal screw servo motor and the vertical screw servo motor to drive the ultrasonic installation assembly to move along a set detection path according to the position information fed back by the visual positioning sensor, and meanwhile, the ultrasonic detector displays characteristic information fed back by the ultrasonic inclined probe.
S5, opening the die. When the ultrasonic detector detects the signal of flash, the multistage hydraulic rod decompresses and separates from the outer surface of the die. Simultaneously, feeding the signal back to a control system of the press, and starting pressure relief of the press; in addition, if the occurrence of flash is not detected at all times, the press starts to release pressure after the set dwell time t1 is reached. And then the hydraulic cylinder drives the upper die to ascend, and the raw material sheet is molded to form the composite material product. And ejecting the molded product by the ejector rod in the mold, and taking out the composite material molded product.
And wherein step S4 further specifically comprises the steps of:
S41, the distance L between the possible position of flash of the known composite material molded product and the outer surface of the mold and the refraction angle beta of the ultrasonic inclined probe are generally 10-200mm, and the refraction angle beta is 30-80 degrees. According to the formula Obtaining the distance H between the ultrasonic inclined probe and the parting surface of the die to be 20-80mm;
S42, the visual positioning sensor takes the parting surface of the die as a datum line, and calculates and obtains the vertical distance H' =0-200 mm between the ultrasonic inclined probe and the parting surface of the die according to the deviation value of the visual field center and the datum line;
S43, driving a vertical screw rod pair to move by a distance h=H '-H by a vertical screw rod servo motor according to the obtained distance parameter, so that the vertical distance H' is equal to H;
S44, determining a scanning path of the ultrasonic oblique probe based on the shape and the size of the composite material product to be detected. The visual positioning sensor uses left and right boundary lines of the mould as reference lines to determine the start and end positions of the ultrasonic inclined probe. The horizontal screw rod servo motor moves the multi-stage hydraulic rod to a corresponding starting position;
S45, after the multi-stage hydraulic rod reaches the initial position, the couplant accommodating device starts to release the couplant. Subtracting the relative height p of the distance sensor and the surface of the ultrasonic inclined probe according to the returned distance of the distance sensor, calculating the distance S=10-100 mm between the ultrasonic inclined probe and the outer surface of the die, and adjusting the length of the multistage hydraulic rod according to the fed-back distance S;
S46, when the distance S=0, continuously pressurizing the multi-stage hydraulic rod, detecting the coupling pressure of the ultrasonic inclined probe and the surface of the die by the pressure sensor, and when the pressure reaches a preset value P2, stopping pressurizing the multi-stage hydraulic rod and maintaining the pressure unchanged;
S47, the vision positioning sensor feeds back the deviation value of the vision center and the datum line to the controller. The controller drives the screw rod pair to drive the ultrasonic inclined probe to move from a starting position to an ending position along the outer surface of the die according to the deviation value, and then returns to the starting position from the ending position according to the reverse path;
s48, displaying characteristic information fed back by the ultrasonic inclined probe on the ultrasonic detector, and displaying obvious reflection echo on the ultrasonic detector when the flash is not generated. When the ultrasonic echo signal is weakened or even disappears, flash is generated.
In the embodiment of scanning the ultrasonic inclined probe along the outer surface of the die, the ultrasonic inclined probe can scan along the outer surface of the upper die or the outer surface of the lower die of the die in the transverse and/or vertical directions, and the specific scanning mode needs to consider the convenience of scanning and the readability of the result, and is determined according to the conditions of the outer surface of the die and the inner structure of the die.
And the molding raw material sheet in the step S2 is formed by alternately arranging fiber layers and thermoplastic resin to form a layering or fiber reinforced composite prepreg, wherein the fibers are carbon fibers or glass fibers.
The temperature target values T1 and T2 of the upper and lower molds, the molding pressure P1, and the dwell time T1 may be specifically set according to the selected molding compound raw material. In this embodiment, the molding pressure P1:700-1000KN, upper die temperature T1:140-170 ℃, lower die temperature T2:140-170 ℃, dwell time t1:1-3min, coupling pressure P2:10-25N, the distance L between the flash and the edge of the die: 10-200mm, refraction angle beta: 30-80 degrees, the relative height p of the distance sensor and the ultrasonic inclined probe surface: 10-50mm, initial distance H' between visual positioning ultrasonic inclined probe and mould parting surface: the actual distance H between the ultrasonic inclined probe and the parting surface of the die is 0-200 mm: 20-80mm, moving distance h:120-180mm, the distance S between the ultrasonic inclined probe and the outer surface of the die: 0-150mm.
Embodiment two:
The structure of the whole set of detection equipment is the same as that of the first embodiment, but the control method is different, and in the step S4 ultrasonic detection in the embodiment, the ultrasonic installation component can continuously detect the flash back and forth until the flash is detected or the dwell time t1 is reached.
Embodiment III:
The structure of the whole set of detection device is the same as that of the first embodiment, but the control method is different, in this embodiment, the echo signal is obtained when the flash is detected in step S3, and then the dwell time t1 is adjusted according to the size of the echo signal, that is, if the echo signal is completely free of flash, the dwell time is not changed, and if the echo signal indicates that a certain flash is generated, but the critical flash threshold is not reached yet, the appropriate dwell time t1 can be reduced.
It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the invention. Any and all equivalents and alternatives falling within the scope of the claims are intended to be embraced therein.
Claims (8)
1. The utility model provides a mould pressing composite product overlap ultrasonic detection device, includes mould press (16) and sets up mould (15) in mould press (16), its characterized in that: the detection device also comprises a controller, a triaxial moving mechanism detachably connected to the molding press (16), an ultrasonic probe arranged on the triaxial moving mechanism and a sensor arranged on the triaxial moving mechanism, wherein the ultrasonic probe and the sensor are in signal connection with the controller;
The detection device also comprises an automatic spraying coupling liquid mechanism (13), the automatic spraying coupling liquid mechanism (13) is connected with the controller through signals,
The automatic coupling liquid spraying mechanism (13) is used for automatically spraying coupling liquid when the ultrasonic probe moves on the surface of the die (15);
The sensor comprises a visual positioning sensor (14.2), a distance sensor (14.3) and a pressure sensor (14.4), wherein the ultrasonic probe is an ultrasonic oblique probe (14.5), and the ultrasonic oblique probe comprises:
Visual positioning sensor (14.2): the path for locating and tracking the scanning of the ultrasonic inclined probe (14.5);
distance sensor (14.3): the ultrasonic probe is used for detecting the distance between the ultrasonic inclined probe (14.5) and the outer surface of the die (15);
Pressure sensor (14.4): the ultrasonic inclined probe (14.5) is fixed on the same plane, and is used for detecting the coupling pressure between the ultrasonic inclined probe (14.5) and the outer surface of the die (15);
and the center of the visual field of the visual positioning sensor (14.2) and the center of the ultrasonic inclined probe (14.5) are positioned at the same horizontal plane.
2. The ultrasonic detection device for flash of a molded composite product according to claim 1, wherein: the three-axis moving mechanism comprises an X-axis moving assembly, a Y-axis moving assembly and a Z-axis moving assembly, wherein the X-axis moving assembly is a horizontal screw shaft (6) and a horizontal screw shaft pair (8), the Z-axis moving assembly is a vertical screw shaft (4) and a vertical screw shaft pair (5), the Y-axis moving assembly is a multi-stage hydraulic rod (12), the ultrasonic probe and the sensor are arranged at one end of the multi-stage hydraulic rod (12), and the horizontal screw shaft pair (8) is arranged at the other end of the multi-stage hydraulic rod (12).
3. The ultrasonic detection device for flash of a molded composite product according to claim 1, wherein: the triaxial moving mechanism is detachably connected to the molding press (16) through the magnetic adsorption mechanism (1).
4. A method of controlling a flash ultrasonic inspection device for molded composite articles as defined in any one of claims 1-3, comprising the steps of:
S1, setting dwell time t1, setting ultrasonic detection paths and flash parameters according to a die to be pressed, and then moving an ultrasonic probe to an initial position through a triaxial moving mechanism;
s2, pressing by a die press, and maintaining pressure after the pressing is finished;
s3, after pressure maintaining starts, the triaxial moving mechanism drives the ultrasonic probe to detect along a detection path set in S1, and when the existence of the flash set in S1 is detected, the next step is skipped; if the flash is not detected after the time t1, jumping to the next step;
S4, pressure release of the molding press.
5. The control method of the ultrasonic detection device for flash of the die-pressed composite product according to claim 4, wherein the control method comprises the following steps: step S1 needs to set coupling pressure P2, step S3 needs to control the multistage hydraulic rod to drive the ultrasonic probe to move on the Y axis, and when the distance between the ultrasonic probe and the die is detected to be 0 by the distance sensor, the multistage hydraulic rod is controlled to continuously pressurize until the pressure detected by the pressure sensor is greater than or equal to the coupling pressure P2, and the multistage hydraulic rod stops pressurizing and keeps the current pressure.
6. The control method of the ultrasonic detection device for flash of the die-pressed composite product according to claim 4, wherein the control method comprises the following steps: and S3, when the ultrasonic probe moves along the detection path set in the step S1 for detection, the automatic coupling liquid spraying mechanism can simultaneously spray coupling liquid on the detection surface of the ultrasonic probe.
7. The control method of the ultrasonic detection device for flash of the die-pressed composite product according to claim 4, wherein the control method comprises the following steps: in the step S3, the oblique sound beam method is adopted to detect flash: if the sound wave does not encounter flash in the advancing process, reflected echoes appear at corresponding sound path positions; if the flash is encountered, the flash plays a role of a coupling agent, sound waves penetrate through the flash and are injected into the lower die, and echo signals are obviously weakened.
8. The control method of the ultrasonic detection device for flash of the molded composite product according to claim 7, wherein the control method comprises the following steps: and step S3, obtaining an echo signal when detecting the flash, and then adjusting the dwell time t1 according to the size of the echo signal.
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