A plate precision positioning platform and positioning method thereof

Abstract

The present invention relates to the technical field of composite materials, and in particular to a plate precision positioning platform and a positioning method thereof, wherein the positioning platform comprises: a supporting platform, wherein the supporting platform has two supporting frames arranged in parallel along its length direction in the middle position; a marking mechanism, comprising a gantry driving frame across the supporting platform and a marking device arranged in the middle of the gantry driving frame and arranged toward the supporting platform; a transverse centering mechanism, which is relatively arranged on both sides of the supporting frame, and the transverse centering mechanism has a push plate arranged in parallel with the supporting frame and a transverse driving component driving the push plate to move toward or away from the supporting frame; a longitudinal centering mechanism, which is arranged at both ends of the supporting frame and can move toward or away from both ends of the supporting frame; wherein the marking mechanism marks the plate when the transverse centering mechanism and the longitudinal centering mechanism move the plate to the centering position. Through the above arrangement, automatic marking of the plate is realized, and the accuracy and efficiency of plate positioning are improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a plate precision positioning platform and a positioning method thereof. Background Art

[0002] Carbon fiber preformed plate is a kind of carbon fiber composite material pre-impregnated with resin, which has the characteristics of high strength, light weight and excellent corrosion resistance. It is mainly used in aerospace, rail transportation, wind power blades and other technical fields. Figure 1 The carbon fiber preformed plate shown needs to be marked in the center of the plate after forming to facilitate subsequent manufacturing, so as to facilitate subsequent operations such as plate alignment.

[0003] In the related art, the marking of the plate is mostly done manually, that is, the worker finds the midpoint at both ends of the plate, pulls the ink fountain line to the midline of the plate, and then marks the plate by flicking the ink fountain line toward the surface where the plate is located; however, the inventors found that the marking accuracy of the above manual operation method has a certain error, which in turn affects the subsequent installation work. Summary of the invention

[0004] In view of at least one of the above technical problems, the present invention provides a plate precision positioning platform and a positioning method thereof, which adopts an automated positioning method to improve the positioning accuracy and efficiency.

[0005] According to a first aspect of the present invention, there is provided a plate precision positioning platform, comprising:

[0006] A support platform, wherein the middle position of the support platform has two support frames arranged in parallel along the length direction thereof;

[0007] The marking mechanism comprises a gantry drive frame spanning the support platform and a marker arranged in the middle of the gantry drive frame and facing the support platform;

[0008] A transverse centering mechanism, which is relatively arranged on both sides of the support frame, and has a push plate arranged parallel to the support frame and a transverse driving component driving the push plate to move toward or away from the support frame;

[0009] A longitudinal centering mechanism is provided at both ends of the support frame and can move toward or away from both ends of the support frame;

[0010] Wherein, the marking mechanism marks on the plate when the transverse centering mechanism and the longitudinal centering mechanism move the plate to the centering position.

[0011] Furthermore, the transverse drive assembly includes a motor, a screw connected to the motor, a nut seat screwed on the screw, and a slide rail arranged toward the support frame, the push plate is fixed on the nut seat, and the nut seat can be relatively slidably connected to the slide rail.

[0012] Furthermore, the support platform is also provided with a pull rod type displacement sensor, and the pull rod end of the pull rod type displacement sensor is parallel to the screw rod and connected to the nut seat.

[0013] Furthermore, the upper surface of the push plate has a first step surface, an inclined positioning surface connected to the first step surface, and a second step surface connected to the inclined positioning surface.

[0014] Furthermore, the push plate also has a detection hole vertically penetrating therethrough, and the detection hole covers the cross section of the inclined positioning surface and extends to the first step surface and the second step surface.

[0015] Furthermore, the push plate is provided with an in-place detector on a side away from the support frame, and the in-place detector has a probe arranged toward the detection hole.

[0016] Furthermore, a plurality of detection holes are arranged along the length direction of the push plate, and the push plate also has a track slidably connected to the detector.

[0017] Furthermore, two probes are arranged relatively to each other, the lower probe extends from the bottom into the detection hole, and the upper probe is located in the detection hole of the inclined positioning surface.

[0018] Furthermore, the longitudinal centering mechanism includes a baffle that can be extended to protrude from the upper surface of the support frame, a telescopic drive connected to the baffle for driving the baffle to extend and retract in the vertical direction, and a centering drive connected to the telescopic drive for driving the letter to move in the length direction of the support frame.

[0019] According to a second aspect of the present invention, there is also provided a positioning method for a plate precision positioning platform as described in any one of the first aspects, comprising the following steps:

[0020] Place the plate on the support frame;

[0021] Drive the lateral centering mechanisms to approach each other and record the moving distance of the lateral centering mechanisms;

[0022] After reaching the set distance, the two longitudinal centering mechanisms are driven away from the two ends of the support frame, and the plate is pressed against the center;

[0023] Check whether the plate is in place;

[0024] If the plate is in place, the marking mechanism is driven to move along the length direction of the support frame and mark the center line of the plate.

[0025] The beneficial effects of the present invention are as follows: the present invention realizes automatic centering operation after the plate is placed on the support frame through the transverse centering mechanism arranged on both sides of the support frame on the support platform and the longitudinal centering mechanism arranged at both ends of the support frame, and then realizes automatic marking of the center line of the plate through the movement of the marking mechanism along the length direction. Compared with the prior art, not only the marking efficiency is improved, but also the marking accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a carbon fiber preformed plate in the background technology of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a plate precision positioning platform in an embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the lateral centering mechanism in an embodiment of the present invention;

[0030] Figure 4 It is a structural schematic diagram of a lateral centering mechanism with an in-position detector in an embodiment of the present invention;

[0031] Figure 5 In the embodiment of the present invention Figure 4 A local enlarged structural diagram of the part;

[0032] Figure 6 This is a schematic diagram of the installation structure of the in-place detector according to an embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the principle of detection by an in-place detector in an embodiment of the present invention;

[0034] Figure 8 It is a partial enlarged structural schematic diagram of the longitudinal centering mechanism in an embodiment of the present invention;

[0035] Fig. 9 It is a flow chart of the steps of the positioning method of the plate precision positioning platform in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] like Figures 2 to 8 The plate precision positioning platform shown in the figure includes a support platform 1, a marking mechanism 2, a transverse centering mechanism 3 and a longitudinal centering mechanism 4, as shown in FIG. Figure 2 As shown in the figure, the middle position of the support platform 1 has two support frames 11 arranged in parallel along its length direction; in the embodiment of the present invention, the surface of the support platform 1 and the upper surface of the support frame 11 need to be kept flat to ensure the stability of the drive of other mechanisms and the flatness of the placement of the plate; of course, it should be pointed out here that in some embodiments of the present invention, the plate is not limited to carbon fiber preformed plates, but can also be other plates that need to be marked.

[0040] The marking mechanism 2 includes a gantry drive frame 21 spanning the support platform 1 and a marker 22 disposed in the middle of the gantry drive frame 21 and disposed toward the support platform 1; Figure 2 As shown in the figure, the gantry drive frame 21 of the marking mechanism 2 refers to the fixing frame of the marking device 22 in the form of a gantry, and the driving of the fixing frame has various structural forms, for example, the driving of the gantry can be realized by meshing a gear with a rack and then rotating the driving gear;

[0041] The transverse centering mechanism 3 is relatively arranged on both sides of the support frame 11. The transverse centering mechanism 3 has a push plate 31 arranged parallel to the support frame 11 and a transverse driving component 32 that drives the push plate 31 to move toward or away from the support frame 11; the transverse centering mechanism 3 is used to drive the plate placed on the support frame 11 toward the middle in the width direction. Specifically, it can adopt a synchronous driving method on both sides or a separate driving method. As for how to judge whether the plate is centered, it can be determined by measuring the moving distance of the push plate 31 or detecting whether the plate is at the set position on the push plate 31.

[0042] The longitudinal centering mechanism 4 is arranged at both ends of the support frame 11, and can move toward or away from both ends of the support frame 11; the longitudinal centering mechanism 4 here mainly serves to fix the position of the plate for later marking; in the embodiment of the present invention, the marking mechanism 2 marks the plate when the transverse centering mechanism 3 and the longitudinal centering mechanism 4 move the plate to the centering position. The specific structure and marking principle of the marker 22 are prior art and will not be described in detail here.

[0043] In the above embodiment, by means of the transverse centering mechanism 3 arranged on both sides of the support frame 11 on the support platform 1 and the longitudinal centering mechanism 4 arranged at both ends of the support frame 11, automatic centering operation is achieved after the plate is placed on the support frame 11, and then the marking mechanism 2 is moved along the length direction to achieve automatic marking of the center line of the plate. Compared with the prior art, not only the marking efficiency is improved, but also the marking accuracy is improved.

[0044] Alternatively, if Figure 3 As shown in , in some embodiments of the present invention, the lateral drive assembly 32 includes a motor 32a, a screw rod 32b connected to the motor 32a, a nut seat 32c screwed on the screw rod 32b, and a slide rail 32d arranged toward the support frame 11, the push plate 31 is fixed on the nut seat 32c, and the nut seat 32c is relatively slidably connected to the slide rail 32d. Figure 3 As shown in FIG. , the nut seat 32 c can be configured as a plate-like structure to facilitate reliable fixation of the push plate 31 .

[0045] In some embodiments of the present invention, the initial position of the push plate 31 can be set, and then the lateral movement distance of the push plate 31 can be calculated according to the number of rotations of the motor 32a. However, due to the gap between the screw rod 32b and the nut seat 32c when they are engaged, there may be a certain error in the calculation of the distance. In order to further improve the accuracy of the calculation of the movement distance of the push plate 31, as shown in FIG. Figure 3 and Figure 4As shown in , the support platform 1 is also provided with a rod displacement sensor 33, the rod end of which is parallel to the screw rod 32b and connected to the nut seat 32c. The rod sensor has the characteristics of high precision and high resolution, low friction coefficient and good stability, so by fixing one end of the rod sensor on the support platform 1 and connecting the other end to the nut seat 32c, the distance moved by the push plate 31 can be calculated more accurately.

[0046] Optionally, the specific structure of the push plate 31 is as follows: Figure 4 and Figure 5 As shown in the figure, the upper surface of the push plate 31 has a first step surface 31a, an inclined positioning surface 31b connected to the first step surface 31a, and a second step surface 31c connected to the inclined positioning surface 31b. The second step surface 31c and the inclined positioning surface 31b can protect the plate and avoid damage to the plate caused by the push plate 31 moving too far. On the other hand, in the embodiment of the present invention, the accuracy of plate positioning can be improved. Figure 7 As shown in the figure, the two sides of the plate in the width direction are wedge-shaped surfaces, and the inclination angle of the wedge-shaped surface is the same as the inclination angle of the inclined positioning surface 31b, so that the side surface of the plate can be fitted with the inclined positioning surface 31b when the push plate 31 moves, thereby further improving the positioning accuracy.

[0047] Optionally, in order to further detect whether the plate on the push plate 31 is in place, as Figure 5 As shown in , the push plate 31 also has a detection hole 31d vertically penetrating therethrough, and the detection hole 31d covers the cross section of the inclined positioning surface 31b and extends to the first step surface 31a and the second step surface 31c. Here, the detection hole 31d covers the inclined positioning surface 31b, which means that, for example, when the detection hole 31d is a circular hole, the center of the detection hole 31d is on the center line of the inclined positioning surface 31b, and the diameter of the detection hole 31d is larger than the width of the inclined positioning surface 31b, but smaller than the width of the push plate 31. Through this arrangement, when observing from the detection hole 31d, it is possible to accurately know whether the plate is on the second step surface 31c, the inclined positioning surface 31b or the first step surface 31a. Of course, it should be pointed out here that there are many specific detection methods, such as visual recognition or other laser detection methods.

[0048] Alternatively, if Figure 6 As shown in FIG. 1 , the push plate 31 is provided with a position detector 34 on the side away from the support frame 11, and the position detector 34 has a probe 34a arranged toward the detection hole 31d. Of course, it should also be pointed out here that in some embodiments of the present invention, a photoelectric sensor can be used to detect whether the plate is in place, specifically, Figure 7As shown in the figure, two probes 34a are arranged opposite to each other, the lower probe 34a extends from the bottom into the detection hole 31d, and the upper probe 34a is in the detection hole 31d of the inclined positioning surface 31b. The two probes 34a are used to emit and receive light beams respectively. When the edge of the plate is detected to be at the set position, the lateral centering mechanism 3 stops driving;

[0049] In some embodiments of the present invention, in order to ensure the accuracy of placement of the entire plate, such as Figure 6 As shown in the figure, a plurality of detection holes 31d are arranged along the length direction of the push plate 31, and the push plate 31 also has a track 35 slidably connected to the detector. With this structural arrangement, the detector can be moved along the length direction of the push plate 31, thereby detecting multiple positions of the edge of the plate. The specific movement can be achieved by manual pushing or by machine driving.

[0050] Alternatively, if Figure 8 As shown in the figure, the longitudinal centering mechanism 4 includes a baffle 41 that can be extended to protrude from the upper surface of the support frame 11, a telescopic driving member 42 connected to the baffle 41 for driving the baffle 41 to extend and retract in the vertical direction, and a centering driving member 43 connected to the telescopic driving member 42 for driving the letter to move in the length direction of the support frame 11. The telescopic driving member 42 here can be a cylinder, and the centering driving member 43 can be a structure of a motor threaded rod and a nut seat 32c, or the telescopic driving member 42 can be moved by the meshing of a gear and a rack. By setting the longitudinal centering driving mechanism, the starting point and the end point of the marker 22 can be accurately located, thereby ensuring the reliability of marking and avoiding waste.

[0051] In an embodiment of the present invention, a positioning method for the plate precision positioning platform is also provided, such as Fig. 9 As shown in , the following steps are included:

[0052] S10: Place the plate on the support frame 11; the placement here can be done manually or by crane. Of course, when placing it specifically, it should be placed in the approximate position on the support frame 11, that is, inside the support platform 1, to avoid exceeding the pushing range of the centering mechanism.

[0053] S20: driving the lateral centering mechanisms 3 to approach each other, and recording the moving distance of the lateral centering mechanisms 3; it should be noted here that the approaching each other can be synchronous or asynchronous, and those skilled in the art can reasonably set it according to actual needs.

[0054] S30: After reaching the set distance, the two longitudinal centering mechanisms 4 are driven away from the two ends of the support frame 11, and the plate is pressed against the middle direction; the specific driving process of the longitudinal centering driving mechanism is to first drive the telescopic driving member 42 to the outside of the two ends of the support frame 11, and then the telescopic driving member 42 drives the baffle 41 to rise to the protrusion above the support frame 11, and then drive the telescopic driving member 42 to move with the baffle 41 toward the center of the support frame 11. The driving distance of the longitudinal centering driving mechanism can be set each time to avoid damage to the plate.

[0055] S40: Check whether the plate is in place. The specific method of checking whether the plate is in place has been mentioned in detail above and will not be repeated here.

[0056] S50: If the plate is in place, the marking mechanism 2 is driven to move along the length direction of the support frame 11 and mark the plate center line. Through the above settings, the automatic centering and marking of the plate is realized, and by detecting the plate in place, the accuracy and efficiency of plate marking are improved compared with the prior art.

[0057] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plate precision positioning platform, characterized in that: include: A support platform, wherein the middle position of the support platform has two support frames arranged in parallel along the length direction thereof; The marking mechanism comprises a gantry drive frame spanning the support platform and a marker arranged in the middle of the gantry drive frame and facing the support platform; A transverse centering mechanism, which is relatively arranged on both sides of the support frame, and has a push plate arranged parallel to the support frame and a transverse driving component driving the push plate to move toward or away from the support frame; A longitudinal centering mechanism is provided at both ends of the support frame and can move toward or away from both ends of the support frame; Wherein, the marking mechanism marks on the plate when the transverse centering mechanism and the longitudinal centering mechanism move the plate to the centering position; The upper surface of the push plate has a first step surface, an inclined positioning surface connected to the first step surface, and a second step surface connected to the inclined positioning surface; The push plate also has a detection hole vertically penetrating therethrough, the detection hole covers the cross section of the inclined positioning surface and extends to the first step surface and the second step surface; The push plate is also provided with an in-place detector on one side away from the support frame, and the in-place detector has a probe arranged toward the detection hole; The longitudinal centering mechanism includes a baffle that can be extended to protrude from the upper surface of the support frame, a telescopic drive connected to the baffle for driving the baffle to extend and retract in the vertical direction, and a centering drive connected to the telescopic drive for driving the baffle to move in the length direction of the support frame.

2. The plate precision positioning platform according to claim 1, characterized in that: The transverse drive assembly includes a motor, a screw connected to the motor, a nut seat screwed on the screw, and a slide rail arranged toward the support frame. The push plate is fixed on the nut seat, and the nut seat can be relatively slidably connected to the slide rail.

3. The plate precision positioning platform according to claim 2, characterized in that: The support platform is also provided with a pull rod type displacement sensor, the pull rod end of the pull rod type displacement sensor is parallel to the screw rod and connected to the nut seat.

4. The plate precision positioning platform according to claim 1, characterized in that: A plurality of detection holes are arranged along the length direction of the push plate, and the push plate is also provided with a track slidably connected to the detector.

5. The plate precision positioning platform according to claim 4, characterized in that: Two probes are arranged opposite to each other. The lower probe extends from the bottom into the detection hole, and the upper probe is located in the detection hole of the inclined positioning surface.

6. A positioning method for a plate precision positioning platform as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Place the plate on the support frame; Drive the lateral centering mechanisms to approach each other and record the moving distance of the lateral centering mechanisms; After reaching the set distance, the two longitudinal centering mechanisms are driven away from the two ends of the support frame, and the plate is pressed against the center; the telescopic driving member is driven to the outside of the two ends of the support frame, the telescopic driving member drives the baffle to rise to protrude above the support frame, and the telescopic member is driven to move with the baffle toward the center of the support frame; Check whether the plate is in place; If the plate is in place, the marking mechanism is driven to move along the length direction of the support frame and mark the center line of the plate.

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