Two-way sensing pressure holding device

Abstract

The present invention discloses a pressure-holding device with two-way sensing, which includes a pressing mechanism, a jacking mechanism, a first pressure sensor, and a second pressure sensor. The jacking mechanism is arranged below the workpiece to be pressure-held and is used to jack up and support the workpiece to be pressure-held; the pressing mechanism is arranged above the workpiece to be pressure-held and is used to apply pressure to the workpiece to be pressure-held and maintain the pressure; a plurality of first pressure sensors are evenly distributed between the pressing mechanism and the workpiece to be pressure-held and are fixedly connected to the pressing mechanism, and are used to detect the force on the workpiece to be pressure-held; a plurality of second pressure sensors are arranged between the jacking mechanism and the workpiece to be pressure-held and are fixedly connected to the jacking mechanism or arranged inside the jacking mechanism, and are used to detect the pressure change during the pressure-holding process of the workpiece to be pressure-held. The present invention can monitor in real time and accurately whether the workpiece to be pressure-held has displacement, tilt during the pressure-holding process, and whether the pressure on each pressure-holding area of the workpiece to be pressure-held is uniform, and has a good pressure-holding effect, improving the quality of the workpiece to be pressure-held.

Description

Technical Field

[0001] The present invention relates to the technical field of automated production, and more specifically, to a pressure-holding device with two-way sensing. Background Art

[0002] Pressure holding is a very common production process for strengthening the adhesion between two workpieces. For example, in the production process of the display industry, after pasting the glass and the middle case, a specific pressure needs to be applied to them for a certain period of time to make the glass and the middle case adhere more tightly and ensure that the glass will not fall off during future use. Currently, the pressure-holding methods are mainly divided into:

[0003] First, manual pressure holding. Manual pressure holding cannot ensure pressure uniformity. As the size of the pressure-held workpiece gradually increases, more and more pressure-holding personnel are required. It is urgent to replace manual labor with machines to save costs and improve quality.

[0004] Second, automatic pressure-holding equipment. Currently, the existing automatic pressure-holding equipment cannot comprehensively sense whether the pressure-held workpiece moves, tilts, or is stressed evenly. If the pressure-held workpiece shifts, it will cause a situation of virtual pressure. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention innovatively provides a pressure-holding device with two-way sensing. Pressure sensors are arranged above and below the pressure-held workpiece, which can accurately monitor in real time whether the pressure-held workpiece displaces, tilts during the pressure-holding process, and whether the pressure on each pressure-holding area of the pressure-held workpiece is uniform. The structure is simple and the pressure-holding effect is good, improving the quality of the pressure-held workpiece.

[0006] To achieve the above technical objectives, the present invention discloses a pressure-holding device with two-way sensing, including a pressure-applying mechanism, a lifting mechanism, a first pressure sensor, and a second pressure sensor.

[0007] The lifting mechanism is arranged below the pressure-held workpiece and is used to lift and support the pressure-held workpiece.

[0008] The pressure-applying mechanism is arranged above the pressure-held workpiece and is used to apply pressure to the pressure-held workpiece carried by the supporting mechanism and maintain the pressure.

[0009] A plurality of the first pressure sensors are evenly distributed between the pressure-applying mechanism and the pressure-held workpiece and are fixedly connected to the pressure-applying mechanism, and are used to detect the force on the pressure-held workpiece.

[0010] A plurality of the second pressure sensors are arranged between the lifting mechanism and the pressure-held workpiece and are fixedly connected to the lifting mechanism or arranged inside the lifting mechanism, and are used to detect the pressure change during the pressure-holding process of the pressure-held workpiece.

[0011] Further, it further includes a supporting mechanism, and the supporting mechanism is supported around the lower part of the workpiece to be pressure-maintained for bearing the workpiece to be pressure-maintained.

[0012] Further, the pressure-applying mechanism includes a pressure-applying motion mechanism and a pressure-applying head. The moving end of the pressure-applying motion mechanism is fixedly connected to the pressure-applying head, and the pressure-applying motion mechanism is used to drive the pressure-applying head to move downward to apply pressure to the workpiece to be pressure-maintained.

[0013] Further, the pressure-applying motion mechanism includes a motor, a transmission component, and a first guiding mechanism. The motor drives the pressure-applying head to move downward through the transmission component, and the first guiding mechanism is used to guide the moving direction of the pressure-applying head.

[0014] Further, the transmission component is a lead screw transmission component or a gear and rack component.

[0015] Further, the pressure-applying motion mechanism includes a cylinder and a second guiding mechanism. The moving end of the cylinder is fixedly connected to the pressure-applying head, and the second guiding mechanism is used to guide the telescopic direction of the moving end of the cylinder.

[0016] Further, the number of the supporting mechanisms is 4, and the 4 supporting mechanisms are arranged in pairs opposite to each other. The pressure-maintaining device with two-way sensing further includes a spacing adjusting mechanism, and the spacing adjusting mechanism is connected to two opposite supporting mechanisms for adjusting the distance between the two opposite supporting mechanisms.

[0017] Further, the pressure-applying mechanism is fixedly connected to the supporting mechanism.

[0018] Further, a foam pressure strip is provided on the surface of the pressure-applying head close to the workpiece to be pressure-maintained.

[0019] Further, the jacking mechanism includes a jacking motion mechanism, a jacking bracket, and jacking columns. The moving end of the jacking motion mechanism is fixedly connected to the jacking bracket. The number of the jacking columns is the same as the number of the second pressure sensors. All the jacking columns are fixedly distributed at the top end of the jacking bracket, and a second pressure sensor is arranged between each jacking column and the workpiece to be pressure-maintained or between each jacking column and the jacking bracket.

[0020] The beneficial effects of the present invention are as follows:

[0021] The pressure-maintaining device with two-way sensing of the present invention is provided with pressure sensors above and below the workpiece to be pressure-maintained to realize two-way sensing, and can accurately monitor in real time whether the workpiece to be pressure-maintained has displacement, tilt during the pressure-maintaining process, and whether the pressure on each pressure-maintaining area of the workpiece to be pressure-maintained is uniform. The structure is simple and the pressure-maintaining effect is good, improving the quality of the workpiece to be pressure-maintained. Description of the Drawings

[0022] Figure 1 It is a schematic three-dimensional structure diagram of the bidirectional sensing pressure-holding device according to an embodiment of the present invention.

[0023] Figure 2 It is a side view of the bidirectional sensing pressure-holding device according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic structure diagram of the jacking mechanism according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic structure diagram of the pressure-applying mechanism according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic connection diagram of the pressure-applying mechanism and the supporting mechanism according to an embodiment of the present invention.

[0027] In the figure,

[0028] 1. Supporting mechanism; 2. Pressure-applying mechanism; 21. Pressure-applying motion mechanism, 22. Pressure-applying head; 23. Foam pressing strip; 211. Cylinder; 212. Second guiding mechanism; 3. Jacking mechanism; 31. Jacking motion mechanism; 32. Jacking bracket; 33. Jacking column; 4. First pressure sensor; 5. Second pressure sensor; 6. Workpiece to be pressure-held; 7. Spacing adjusting mechanism; 8. Fixed plate. Specific embodiments

[0029] The bidirectional sensing pressure-holding device provided by the present invention will be explained and described in detail below with reference to the accompanying drawings of the specification.

[0030] This embodiment specifically discloses a bidirectional sensing pressure-holding device (hereinafter referred to as the pressure-holding device), as shown in Figure 1 and 2As shown, it includes a pressure applying mechanism 2, a jacking mechanism 3, a first pressure sensor 4, and a second pressure sensor 5. The jacking mechanism 3 is arranged below the workpiece 6 to be pressure-maintained, and is used to jack up and support the workpiece 6 to be pressure-maintained. The pressure applying mechanism 2 is arranged above the workpiece 6 to be pressure-maintained, and is used to apply pressure to the workpiece 6 to be pressure-maintained and cooperate with the jacking mechanism 2 to maintain the pressure. A plurality of first pressure sensors 4 are evenly distributed between the pressure applying mechanism 2 and the workpiece 6 to be pressure-maintained and are fixedly connected to the pressure applying mechanism 2, and are used to detect the force on the workpiece 6 to be pressure-maintained. The plurality of first pressure sensors 4 are evenly distributed, which can not only detect and sense the force conditions of each pressure-maintaining area of the workpiece 6 to be pressure-maintained, judge whether the pressure received by the workpiece 6 to be pressure-maintained reaches the pressure value required by the process, but also judge whether the force on each pressure-maintaining area is uniform through the comparison between the pressure values detected by the plurality of first pressure sensors 4; moreover, if the pressure value detected by the first pressure sensor 4 at a certain position is different from or zero compared with the detected values of the first pressure sensors 4 at other positions, it means that the workpiece 6 to be pressure-maintained has displaced or tilted. For example, if the pressure values detected by one or several first pressure sensors are zero, while the pressure values detected by other first pressure sensors are the same and non-zero, it is usually because the workpiece 6 to be pressure-maintained moves away from the first pressure sensor with a detected pressure value of zero; if the pressure values detected by one or several first pressure sensors are zero, while the pressure values detected by other first pressure sensors are different and non-zero, it is usually that the workpiece 6 to be pressure-maintained is tilted, and the height of the workpiece 6 to be pressure-maintained at the first pressure sensor with a pressure value of zero is lower than that at other positions; a plurality of second pressure sensors 5 are arranged between the jacking mechanism 3 and the workpiece 6 to be pressure-maintained and are fixedly connected to the jacking mechanism 3 or arranged inside the jacking mechanism 3, and are used to detect the pressure change during the pressure-maintaining process of the workpiece 6 to be pressure-maintained so as to judge whether the workpiece 6 to be pressure-maintained has displaced, tilted, and whether the force on the pressure-maintaining area is uniform. The method of judging whether displacement, tilt occurs and whether the force on the pressure-maintaining area is uniform through the second pressure sensor is the same as the method of judging through the first pressure sensor, and is also obtained through the comparison result between the pressure values detected by the plurality of second pressure sensors.

[0031] In this embodiment, by arranging pressure sensors both above and below the workpiece to be pressure-maintained, two-way sensing is realized. Through two-way sensing and comparison judgment, the judgment result is more accurate, and thus a better pressure-maintaining effect can be ensured.

[0032] Such as Figure 3As shown in the figure, the jacking mechanism 3 includes a jacking motion mechanism 31, a jacking support 32, and a jacking column 33. The moving end of the jacking motion mechanism 31 is fixedly connected to the jacking support 32. The number of jacking columns 33 is the same as the number of second pressure sensors. All the jacking columns 33 are fixedly distributed at the top end of the jacking support 32. The jacking support 32 connects all the jacking columns 33 together to ensure that all the jacking columns 33 move up or down synchronously and apply the same force. A second pressure sensor 5 is provided between each jacking column 33 and the workpiece to be pressure-maintained 6 or between each jacking column 33 and the jacking support 32. In this embodiment, in order to avoid scratching the surface of the workpiece to be pressure-maintained 6 by the second pressure sensor 5, the second pressure sensor 5 is provided between the jacking column 33 and the jacking support 32. In this embodiment, the jacking column 33 contacts and jacks the bottom surface of the workpiece to be pressure-maintained 6 because the contact surface between the jacking column 33 and the workpiece to be pressure-maintained 6 is small, and the sensed pressure is sensitive and accurate. When the workpiece to be pressure-maintained 6 is displaced or tilted, it can be easily sensed by comparing the pressure values detected by each second pressure sensor 5. In this embodiment, the number of jacking columns 33 and second pressure sensors 5 is 4 each, and they are distributed in a rectangular shape, supporting the middle part of the bottom surface of the workpiece to be pressure-maintained 6.

[0033] As Figure 4 shown, the pressing mechanism 2 includes a pressing motion mechanism 21 and a pressing head 22. The moving end of the pressing motion mechanism 21 is fixedly connected to the pressing head 22. The pressing motion mechanism 21 is used to drive the pressing head 22 to move downward to apply pressure to the workpiece to be pressure-maintained 6. The first pressure sensor 4 is provided on the lower end surface of the pressing head 22. Multiple first pressure sensors 4 can be provided along the length direction of one pressing head 22 to detect the forces on each pressure-maintaining area of the workpiece to be pressure-maintained 6. The distance between the first pressure sensors 4 can be set according to actual needs.

[0034] In some embodiments, the pressing motion mechanism 21 includes a motor, a transmission component, and a first guiding mechanism. The motor drives the pressing head 22 to move downward through the transmission component. The transmission component is a conversion device that converts rotational motion into linear motion. The first guiding mechanism is used to guide the moving direction of the pressing head 22.

[0035] The transmission assembly is a lead screw transmission assembly or a rack and pinion assembly. When the transmission assembly is a lead screw transmission assembly, it includes a lead screw, a lead screw fixing seat, and a nut-type slider. The first guiding mechanism is a slide rail matching the nut-type slider. The output end of the motor of the pressure application movement mechanism 21 is connected to the lead screw. The two ends of the lead screw are respectively fixed in the lead screw fixing seat, and the lead screw can rotate relative to the lead screw fixing seat: a bearing is fixed in the lead screw fixing seat, the outer ring of the bearing is fixedly connected to the lead screw fixing seat, and the inner ring of the bearing is fixedly connected to the lead screw; the nut-type slider is threadedly connected to the lead screw, and the nut-type slider is clamped in the chute of the slide rail and can slide along the slide rail. The lead screw is parallel to the slide rail. The nut-type slider is connected to the pressure application head 22. The nut-type slider is sleeved on the lead screw and is threadedly connected to the lead screw. The side part of the nut-type slider is clamped in the chute, and the bottom of the nut-type slider is fixedly connected to the pressure application head 22. The motor drives the lead screw to rotate relative to the lead screw fixing seat, and the nut-type slider moves in the chute, thereby driving the pressure application head 22 to move up and down. When the transmission assembly is a rack and pinion assembly, it includes a gear and a rack that mesh with each other. The first guiding mechanism is a slide rail that cooperates with the rack. The rack can slide in the chute of the slide rail. The gear is connected to the output end of the motor. The motor drives the gear to rotate, so that the rack slides along the chute. The bottom of the rack is fixedly connected to the pressure application head 22, driving the pressure application head 22 to move up and down.

[0036] In this embodiment, as Figure 4 shown, the pressure application movement mechanism 21 includes a cylinder 211 and a second guiding mechanism 212. The moving end of the cylinder 211 is fixedly connected to the pressure application head 22. The second guiding mechanism 212 is used to guide the telescopic direction of the moving end of the cylinder 211. A fixed fixing plate 8 can be provided and fixedly connected to the cylinder 211. The cylinder barrel of the cylinder 211 is fixed above the fixing plate 8. The moving end of the cylinder 211 passes through the fixing plate 8 and extends below the fixing plate 8. The bottom of the moving end of the cylinder 211 is fixedly connected to the pressure application head 22. The second guiding mechanism 212 includes two guiding shafts. The two guiding shafts are distributed on both sides of the cylinder 211. The fixing plate 8 is provided with limiting guiding holes. The guiding shafts penetrate into the limiting guiding holes and slide relative to the limiting guiding holes. The bottom ends of the guiding shafts are fixedly connected to the pressure application head 22, playing a guiding role. The guiding shafts move up and down in the limiting guiding holes along with the moving end of the cylinder 211. The limiting guiding holes play a limiting and guiding role, ensuring that the pressure application head 22 moves up and down and the forces on both sides of the pressure application head 22 are the same, for uniform pressure application.

[0037] In some embodiments, as Figure 4 shown, a foam strip 23 is provided on the surface of the pressure application head 22 close to the workpiece 6 to be pressure-maintained. Since the pressure application head 22 is made of a rigid material, it may scratch the surface of the workpiece 6 to be pressure-maintained during the pressure application process, especially the workpiece 6 in the display industry, affecting the display effect. Therefore, a foam strip 23 is provided on the bottom surface of the pressure application head 22 to reduce scratches on the surface of the workpiece 6 to be pressure-maintained. The first pressure sensor 4 is arranged between the pressure application head 22 and the foam strip 23.

[0038] The specific structure of the jacking motion mechanism 31 can be the same as that of the pressing motion mechanism 21, as long as it can realize the rising and falling of the jacking support 32, which will not be elaborated here.

[0039] In another embodiment, on the basis of the above embodiment, the pressure-holding device further includes a supporting mechanism 1. The supporting mechanism 1 is supported around the lower part of the workpiece 6 to be pressure-held, and is used to carry the workpiece 6 to be pressure-held, so as to keep the flatness and stability of the edge of the workpiece 6 to be pressure-held during the pressure-holding process. By setting the supporting mechanism 1, the supporting mechanism can play a major role in carrying the workpiece to be pressure-held, while the jacking mechanism jacks up and assists in supporting the workpiece to be pressure-held. At this time, not only can it be judged whether the workpiece to be pressure-held has displacement, tilt and whether the force is uniform by comparing the pressure values detected by the second pressure sensor, but also it can be judged whether the workpiece to be pressure-held is deformed by the pressure values detected by the second pressure sensor.

[0040] Specifically, when performing pressure holding, first place the workpiece 6 to be pressure held above the lifting mechanism 3. Preferably, the lifting mechanism 3 supports the middle part of the workpiece 6 to be pressure held to support the workpiece 6 to be pressure held. At this time, the second pressure sensor 5 can detect the pressure value corresponding to the weight of the workpiece 6 to be pressure held. Then, place the supporting mechanism 1 around the lower part of the workpiece 6 to be pressure held. During the process of the supporting mechanism 1 supporting the workpiece 6 to be pressure held, the pressure value detected by the second pressure sensor 5 will change and gradually decrease. It is possible to judge whether the bearing capacity provided by the supporting mechanism 1 is stable and whether the workpiece 6 to be pressure held is completely supported on the supporting mechanism 1 by observing the change in the pressure value detected by the second pressure sensor 5. During this process, the lifting height and position of the lifting mechanism 3 can be adjusted according to the change in the pressure value. Slight pressure is sensed through the second pressure sensor 5 to ensure that the lifting mechanism 3 supports under the middle of the workpiece 6 to be pressure held, preventing it from sagging and deforming downward, and not being lifted excessively: when the bottom surface of the lifting mechanism contacts the workpiece 6 to be pressure held and the top surface of the lifting mechanism is at the same height as the surface of the supporting mechanism contacting the workpiece 6 to be pressure held, if the pressure value sensed by the second pressure sensor 5 is very small and almost close to zero, it indicates that there is no sagging and deformation at the position of the workpiece 6 to be pressure held corresponding to the lifting mechanism. In this embodiment, it means that there is no sagging and deformation at the center of the workpiece 6 to be pressure held. If the top height of the lifting mechanism is lower than the surface of the supporting mechanism contacting the workpiece 6 to be pressure held, but the pressure value detected by the second pressure sensor is large but not greater than the pressure value corresponding to the weight of the workpiece 6 to be pressure held, it indicates that the middle part of the workpiece 6 to be pressure held sags and deforms downward. The middle part of the workpiece 6 to be pressure held can be slightly adjusted upward by the lifting mechanism to prevent the workpiece 6 to be pressure held from deforming until the lifting mechanism rises to contact the bottom surface of the workpiece 6 to be pressure held and the top surface of the lifting mechanism is at the same height as the surface of the supporting mechanism contacting the workpiece 6 to be pressure held, preventing the workpiece 6 to be pressure held from sagging and deforming during the pressure holding process. During the pressure holding process, if the pressure value detected by the second pressure sensor continues to increase, it indicates that the center of the workpiece 6 to be pressure held is lifted excessively and there is a tendency for the center of the workpiece 6 to be pressure held to bulge upward. Then, the height of the lifting mechanism can be adjusted downward. Generally, this situation will not occur unless the supporting mechanism and the pressure applying mechanism move downward). During the lifting process, the lifting height can be judged by comparing the pressure value detected by the second pressure sensor with the pressure value corresponding to the weight of the workpiece 6 to be pressure held, avoiding excessive lifting of the workpiece 6 to be pressure held. Moreover, there is an interval distance between multiple second pressure sensors 5, and this distance can be adjusted according to actual needs. By comparing the pressure values detected between the second pressure sensors 5, it is possible to judge whether the workpiece 6 to be pressure held is tilted. If it is tilted, the pressure value at the lower position of the workpiece 6 to be pressure held detected by the second pressure sensor is greater than the pressure value at the higher position. The position and angle of the workpiece 6 to be pressure held can be adjusted according to the comparison of the pressure values. Even during the pressure holding process, it is possible to judge whether the workpiece 6 to be pressure held is tilted or deformed by comparing the pressure values detected by multiple second pressure sensors 5.

[0041] Under normal circumstances, the workpiece 6 to be pressure-held in the display industry is usually rectangular. In the display industry, pressure is applied and held only on the four edges of the workpiece 6 to be pressure-held. Since the size of the workpiece 6 to be pressure-held is relatively large, the supporting mechanism 1 only supports the periphery below the workpiece 6 to be pressure-held, and there is a situation where the center of the workpiece 6 to be pressure-held sags downward and deforms. The jacking mechanism and the second pressure sensor in this embodiment can effectively sense the deformation of the workpiece to be pressure-held and provide a jacking force accordingly to prevent its deformation.

[0042] In this embodiment, the supporting mechanism 1 is a clamping jaw. The number of the supporting mechanisms 1 is 4, and the 4 supporting mechanisms 1 are arranged in pairs opposite to each other. The pressure-holding device with two-way sensing further includes a spacing adjusting mechanism 7. The spacing adjusting mechanism 7 is connected to two opposite supporting mechanisms 1 and is used to adjust the distance between the two opposite supporting mechanisms 1, and adjust the distance between the 4 supporting mechanisms 1 according to the size of the workpiece 6 to be pressure-held to ensure that the workpiece 6 to be pressure-held can be stably carried.

[0043] The spacing adjusting mechanism 7 is a lead screw adjusting mechanism or a slider-rail adjusting mechanism. When the spacing adjusting mechanism 7 is a lead screw adjusting mechanism, it includes a motor, a lead screw, two nut-type sliders and a rail. The output end of the motor is connected to the lead screw. The two ends of the lead screw are respectively fixed in the lead screw fixing seats. The lead screw can rotate relative to the lead screw fixing seats: a bearing is fixed in the lead screw fixing seat. The outer ring of the bearing is fixedly connected to the lead screw fixing seat, and the inner ring of the bearing is fixedly connected to the lead screw. The lead screw fixing seat can be fixedly connected to the body of the motor; the two nut-type sliders are threadedly connected to the lead screw, and the two nut-type sliders are clamped in the chute of the rail and can slide relative to the rail along the rail. The lead screw is parallel to the rail. Each nut-type slider is connected to a supporting mechanism 1. The upper part of the nut-type slider is sleeved on the lead screw and threadedly connected to the lead screw. The middle side part of the nut-type slider is clamped in the chute, and the bottom of the nut-type slider is fixedly connected to the supporting mechanism 1. The motor drives the lead screw to rotate relative to the lead screw fixing seat. The thread directions in the two nut-type sliders are opposite. When the lead screw rotates, the two nut-type sliders move relative to each other or move in opposite directions in the chute, so as to adjust the distance between the two opposite supporting mechanisms 1. When the spacing adjusting mechanism 7 is a slider-rail adjusting mechanism, it includes a rail and two sliders. Each slider is correspondingly connected to a supporting mechanism 1. The distance between the two supporting mechanisms 1 is adjusted by sliding the sliders along the rail. Multiple limit holes can be provided on the rail. After the slider slides to the appropriate position, a limit pin is inserted into the limit hole to lock the sliding of the slider to ensure that the position of the supporting mechanism 1 does not change during the pressure-holding process and provide a stable bearing capacity.

[0044] The pressing mechanism 2 is fixedly connected to the supporting mechanism 1. While adjusting the distance between the supporting mechanisms 1 by moving the supporting mechanism 1, the pressing mechanism 2 moves together with the supporting mechanism 1. Specifically, when the pressing motion mechanism 21 includes a motor, a transmission assembly, and a first guiding mechanism, the body of the motor of the pressing motion mechanism and the first guiding mechanism are fixedly connected to the supporting mechanism 1. When the transmission assembly is a lead screw transmission assembly, the lead screw fixed seat is fixedly connected to the supporting mechanism 1; when the pressing motion mechanism 21 includes a cylinder 211 and a second guiding mechanism 212, the fixing plate 8 is fixed on the supporting mechanism 1. Each supporting mechanism 1 supports one side of the workpiece to be pressure-maintained. As shown in Figure 1 , 2 , 4, and 5, each supporting mechanism 1 can be fixedly connected with multiple pressing mechanisms 2. A plurality of first pressure sensors are evenly distributed between the pressing heads of each pressing mechanism 2 and the workpiece to be pressure-maintained, so as to realize the overall pressure-maintaining of the workpiece to be pressure-maintained and the pressure perception of each pressure-maintaining area of the workpiece to be pressure-maintained. In this embodiment, the long side of the workpiece to be pressure-maintained is pressure-maintained by 4 pressing mechanisms 2, and the short side is pressure-maintained by 2 pressing mechanisms 2.

[0045] The pressure value detected by the first pressure sensor 4 in this embodiment is closest to the pressure applied by the pressing mechanism 2 on the workpiece 6 to be pressure-maintained, and can detect the pressure uniformity of the pressing head 22 in the length direction during the pressure-maintaining process. The setting of the lifting mechanism 3 avoids the intermediate depression deformation caused when the workpiece 6 to be pressure-maintained is only supported by the four-side supporting mechanism 1 during the pressure-maintaining process. The second pressure sensor 5 array can measure the weight of the workpiece 6 to be pressure-maintained and the local pressure change of the workpiece 6 to be pressure-maintained during the pressure-maintaining process, so as to judge the deformation condition of the workpiece 6 to be pressure-maintained and correspondingly lift it through the lifting mechanism to prevent deformation.

[0046] Combining the data of the upper-layer first pressure sensor 4 and the lower-layer second pressure sensor 5, the pressure-maintaining condition can be accurately judged, preventing situations such as mis-pressing and virtual pressing, and ensuring the pressure-maintaining effect.

[0047] The pressure-maintaining device in this embodiment further includes a control system. The control system can obtain the pressure values detected by the first pressure sensor 4 and the second pressure sensor 5 in real time, and conduct comparative analysis and alarm. It can guide and control the pressure-maintaining working process according to this information. For example: (1) Control the pressing speed and pressing distance of the pressing mechanism 2 to ensure that the pressure received by the workpiece reaches the process requirements; (2) Adjust the position of the supporting mechanism and the lifting height of the lifting mechanism to adjust the position of the workpiece 6 to be pressure-maintained, ensuring that the workpiece does not displace and deform; (3) Sense the slight pressure through the second pressure sensor 5 to ensure that the lifting mechanism 3 supports under the middle of the workpiece 6 to be pressure-maintained to prevent it from deforming downward, without excessive lifting. It can also control the opening and stopping, working process, and working speed of the pressing mechanism 2, the spacing adjusting mechanism 7, and the lifting mechanism 3, and execute two-way pressure-maintaining process control. The control method of the control system adopts the existing control method.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0049] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and simple improvements made to the substantial content of the present invention should be included in the protection scope of the present invention.

Claims

1. A bidirectional sensing pressure maintaining device, characterized in that, It includes a pressure applying mechanism (2), a jacking mechanism (3), a first pressure sensor (4) and a second pressure sensor (5). The jacking mechanism (3) is arranged below the workpiece to be pressure-maintained (6) and is used for jacking up and supporting the workpiece to be pressure-maintained (6). The pressure applying mechanism (2) is arranged above the workpiece to be pressure-maintained (6) and is used for applying pressure to the workpiece to be pressure-maintained (6) carried by the supporting mechanism (1) and maintaining the pressure. A plurality of the first pressure sensors (4) are evenly distributed between the pressure applying mechanism (2) and the workpiece to be pressure-maintained (6) and are fixedly connected to the pressure applying mechanism (2), and are used for detecting the force on the workpiece to be pressure-maintained (6). A plurality of the second pressure sensors (5) are arranged between the jacking mechanism (3) and the workpiece to be pressure-maintained (6) and are fixedly connected to the jacking mechanism (3) or arranged inside the jacking mechanism (3), and are used for detecting the pressure change during the pressure-maintaining process of the workpiece to be pressure-maintained (6). It further includes a supporting mechanism (1), and the supporting mechanism (1) is supported around the lower part of the workpiece to be pressure-maintained (6) and is used for carrying the workpiece to be pressure-maintained (6). When performing pressure-maintaining, first place the workpiece to be pressure-maintained (6) above the jacking mechanism (3), and the jacking mechanism (3) supports the workpiece to be pressure-maintained (6). At this time, the second pressure sensor (5) can detect the pressure value corresponding to the weight of the workpiece to be pressure-maintained (6); then support the supporting mechanism (1) around the lower part of the workpiece to be pressure-maintained (6). During the process that the supporting mechanism (1) supports the workpiece to be pressure-maintained (6), the pressure value detected by the second pressure sensor (5) will change and gradually decrease. By observing the change of the pressure value detected by the second pressure sensor (5), judge whether the bearing capacity provided by the supporting mechanism (1) is stable and whether the workpiece to be pressure-maintained (6) is completely supported on the supporting mechanism (1); during this process, the jacking height and position of the jacking mechanism (3) can be adjusted according to the pressure value change, and a slight pressure is sensed through the second pressure sensor (5) to ensure that the jacking mechanism (3) is lifted under the middle of the workpiece to be pressure-maintained (6) to prevent it from sagging and deforming downward, and not being lifted too much: when the jacking mechanism is in contact with the bottom surface of the workpiece to be pressure-maintained and the top surface of the jacking mechanism is at the same height as the surface of the workpiece to be pressure-maintained in contact with the supporting mechanism, if the pressure value sensed by the second pressure sensor (5) is very small and almost close to zero, it indicates that there is no sagging deformation at the position of the workpiece to be pressure-maintained corresponding to the jacking mechanism. If the top height of the jacking mechanism is lower than the surface of the supporting mechanism in contact with the workpiece under pressure maintaining, but the pressure value detected by the second pressure sensor is large but not greater than the pressure value corresponding to the weight of the workpiece under pressure maintaining, it indicates that the middle part of the workpiece under pressure maintaining (6) is sunken and deformed downward. The middle part of the workpiece under pressure maintaining can be slightly adjusted to be jacked upward by the jacking mechanism to prevent the workpiece under pressure maintaining from deforming until the jacking mechanism rises to contact the bottom surface of the workpiece under pressure maintaining and the top surface of the jacking mechanism is at the same height as the surface of the supporting mechanism in contact with the workpiece under pressure maintaining, so as to prevent the sunken deformation of the workpiece under pressure maintaining (6) during the pressure maintaining process; during the pressure maintaining process, if the pressure value detected by the second pressure sensor continues to increase, it indicates that the jacking at the center of the workpiece under pressure maintaining is excessive and there is a tendency for the center of the workpiece under pressure maintaining to bulge upward. Then, the height of the jacking mechanism can be adjusted downward.

2. The two-way sensing pressure maintaining device according to claim 1, wherein The pressing mechanism (2) includes a pressing motion mechanism (21) and a pressing head (22). The moving end of the pressing motion mechanism (21) is fixedly connected to the pressing head (22). The pressing motion mechanism (21) is used to drive the pressing head (22) to move downward to apply pressure to the workpiece under pressure maintaining (6).

3. The pressure-holding device with bidirectional sensing according to claim 2, wherein The pressing motion mechanism (21) includes a motor, a transmission assembly, and a first guiding mechanism. The motor drives the pressing head (22) to move downward through the transmission assembly. The first guiding mechanism is used to guide the moving direction of the pressing head (22).

4. The pressure-holding device with bidirectional sensing according to claim 3, characterized in that, The transmission assembly is a lead screw transmission assembly or a rack and pinion assembly.

5. The pressure-holding device with two-way sensing according to claim 2, characterized in that, The pressing motion mechanism (21) includes a cylinder (211) and a second guiding mechanism (212). The moving end of the cylinder (211) is fixedly connected to the pressing head (22). The second guiding mechanism (212) is used to guide the telescopic direction of the moving end of the cylinder (211).

6. The pressure holding device with two-way sensing according to claim 1, characterized in that, The number of the supporting mechanisms (1) is 4, and the 4 supporting mechanisms (1) are arranged in pairs opposite to each other. The pressure maintaining device with two-way sensing further includes a spacing adjusting mechanism (7). The spacing adjusting mechanism (7) is connected to two opposite supporting mechanisms (1) and is used to adjust the distance between the two opposite supporting mechanisms (1).

7. The pressure-holding device with bidirectional sensing according to claim 6, characterized in that, The pressing mechanism (2) is fixedly connected to the supporting mechanism (1).

8. The bidirectional sensing pressure maintaining device according to any one of claims 2-5, characterized in that, A foam strip (23) is provided on the surface of the pressing head (22) close to the workpiece under pressure maintaining (6).

9. The pressure-holding device with two-way sensing according to claim 1, wherein, The jacking mechanism (3) includes a jacking motion mechanism (31), a jacking bracket (32), and jacking columns (33). The moving end of the jacking motion mechanism (31) is fixedly connected to the jacking bracket (32). The number of the jacking columns (33) is the same as the number of the second pressure sensors (5). All the jacking columns (33) are fixedly distributed at the top end of the jacking bracket (32). A second pressure sensor (5) is provided between each jacking column (33) and the workpiece under pressure maintaining (6) or between each jacking column (33) and the jacking bracket (32).

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