A positioning device

Abstract

This application discloses a positioning device, comprising: a fixed platform; a sliding positioning mechanism disposed on the fixed platform, the sliding positioning mechanism being capable of reciprocating along the longitudinal and / or transverse direction of the platform; and a combined driving mechanism disposed above and / or below the platform; wherein a positioning and clamping space is formed between the combined driving mechanism and the sliding positioning mechanism, the target object is placed within the positioning and clamping space, and the combined driving mechanism is capable of moving toward and clamping the target object. Through the above-mentioned configuration, this application achieves compatibility with various irregularly shaped target objects, eliminates the need for overall disassembly of tooling, integrates the positioning and clamping processes, ensures smooth operation, greatly improves processing efficiency, and provides high repeatability, thereby guaranteeing the processing accuracy of the screen printing plate.

Description

Technical Field

[0001] This application relates to the field of positioning technology, specifically to a positioning device. Background Technology

[0002] A screen printing plate, also known as a silkscreen printing plate, is a medium for transferring patterns. In high-precision manufacturing fields such as photovoltaics, electronic printing, and thick-film circuits, the accuracy, uniformity, and consistency of printing directly determine the electrical performance (such as conductivity, resistance, and conversion efficiency) and reliability of the product. Printing typically requires high-precision screen printing plates as the pattern carrier. During the screen printing process, the plate needs to be precisely fixed on the worktable; this is a prerequisite for creating a high-precision screen printing plate.

[0003] Currently, most common screen printing frames are rectangular. Existing technologies typically use fixed positioning blocks for simple positioning of the frame. This involves using positioning blocks on the front and sides of the platform to hold the screen against the blocks for edge positioning. This positioning method is simple in structure and suitable for standard rectangular screen printing frames.

[0004] However, with the continuous development of high-precision wire mesh manufacturing technology and the increasing diversification of end-product appearance and functional integration, the shape of the screen frame has become increasingly complex, resulting in various irregular structures such as trapezoids, rounded rectangles, and those with notches or lugs. Traditional edge-positioning methods are no longer suitable for irregularly shaped screens of different sizes. Existing fixtures have fixed structures, requiring complete disassembly or tooling replacement during shape changes, which is cumbersome and inefficient. Furthermore, there is a lack of a unified alignment benchmark for irregularly shaped screen frames, making manual adjustments difficult to guarantee repeatability. In addition, existing fixtures mostly use rigid clamping methods, which can easily cause indentations or deformation to the screen frame (especially lightweight materials such as aluminum alloys), thus affecting the processing quality and service life of the screen.

[0005] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content

[0006] The purpose of this application is to provide a positioning device that is easy to adjust and has high positioning accuracy, including: Fixed platform; A sliding positioning mechanism is disposed on the fixed platform, and the sliding positioning mechanism is capable of reciprocating along the longitudinal and / or transverse direction of the platform; and A combined drive mechanism is disposed above and / or below the platform; A positioning and clamping space is formed between the combined driving mechanism and the sliding positioning mechanism. The target object is placed in the positioning and clamping space, and the combined driving mechanism can move toward the target object and clamp the target object.

[0007] In one embodiment, the sliding positioning mechanism includes at least one mounting plate connected to the fixed platform, and a first positioning element fixed to the mounting plate; The fixed platform further includes a second positioning member that is fixed relative to the fixed platform and cooperates with the first positioning member, and is adapted to define the terminal position of the mounting plate.

[0008] In one embodiment, the combined drive mechanism includes a connecting rod and a drive clamping component mounted on the connecting rod. The connecting rod can move relative to the target object under external force. The drive end of the drive clamping component is positioned toward the edge of the target object and clamps and releases under external force.

[0009] In one embodiment, the mounting plate has a first working position on the right side of the fixed platform, in which the two first positioning members abut against the positioning grooves on both sides of the target object.

[0010] In one embodiment, the mounting plate also has a second working position on the right side of the fixed platform. In the second working position, the bottom right side of the target object has a third positioning member, which is inserted into a positioning groove on the mounting plate.

[0011] In one embodiment, the mounting plate also has a third working position on the right side of the fixed platform, and at least three of the first positioning elements are provided; In the third working position, one of the first positioning members abuts against the right side of the target object, and the other two first positioning members abut against the bottom edge of the target object.

[0012] In one embodiment, the mounting plate and the fixed platform are connected by a linear guide rail and slider pair, or a profile T-slot and nut pair.

[0013] In one embodiment, the drive clamping component includes a clamping drive connected to the connecting rod and a clamping member connected to the drive end of the clamping drive.

[0014] In one embodiment, the clamping drive is a pneumatic cylinder, the cylinder body of which is fixed to the connecting rod, and the piston rod end of the pneumatic cylinder is provided with a replaceable flexible pressure head as the clamping element.

[0015] In one embodiment, the surface of the fixed platform is provided with visual scales or positioning marks.

[0016] Compared with the prior art, this application has the following beneficial effects: This application provides a fixed platform, a sliding positioning mechanism on the fixed platform, and a combined drive mechanism above and / or below the platform. The combined drive mechanism and the sliding positioning mechanism directly enclose a positioning and clamping space. The target object is placed in the positioning and clamping space, and the combined drive mechanism can move towards the target object and clamp the target object. This allows the entire device to be compatible with various irregularly shaped target objects, without the need for overall disassembly of the tooling. The positioning and clamping process is integrated, the action is continuous, the processing efficiency is greatly improved, and the repeatability is high, thereby ensuring the processing accuracy of the screen printing plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the positioning device of this application; Figure 2 yes Figure 1 A schematic diagram of the implementation process structure; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the positioning device of this application; Figure 4 This is a schematic diagram of the structure of Embodiment 3 of the positioning device of this application. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0019] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Example 1: Please refer to Figure 1 and Figure 2 The positioning device described in this application has one basic form, including a fixed platform 1. The fixed platform 1 is spliced ​​from aluminum profiles with anodized surfaces. T-slots are machined around the platform for installing various sensor brackets or protective covers (not shown in the figure).

[0022] A sliding positioning mechanism and a combined drive mechanism 6 are installed on the fixed platform 1. The sliding positioning mechanism can slide back and forth along the longitudinal and / or transverse direction of the fixed platform 1. The combined drive mechanism 6 is located above and / or below the fixed platform 1. A positioning and clamping space is formed between the combined drive mechanism 6 and the sliding positioning mechanism. When the target object is placed in the positioning and clamping space, the combined drive mechanism 6 can move towards the target object and clamp it. This allows the entire device to be compatible with various irregularly shaped target objects without the need for overall disassembly of the tooling. The positioning and clamping processes are integrated, the actions are continuous, and the processing efficiency is greatly improved. In this embodiment, the target object is a screen printing plate.

[0023] Specifically, the sliding positioning mechanism includes at least one mounting plate 3 connected to the platform, and a first positioning element 4 fixed on the mounting plate 3. In this embodiment, the mounting plate 3 is suspended on the right side of the fixed platform 1 via a linear guide rail pair 2. The slider end of the linear guide rail pair 2 is threadedly fastened to the back of the mounting plate 3, and the guide rail end is countersunk and fixed to the fixed platform 1, ensuring that the mounting plate 3 has only a single degree of freedom along the Y-axis (longitudinal direction). In other embodiments, appropriate connection methods can be selected according to actual needs, such as profile T-slot and nut pair connection, etc., as long as the actual needs are met, no specific limitation is made here.

[0024] The upper surface of the mounting plate 3 has several positioning mounting holes 31 spaced apart for quick replacement of the first positioning component 4 at different heights. The second positioning component 5 is fixed on the fixed platform 1 by the mounting base 51. When the mounting plate 3 is pushed to the end, the first positioning component 4 and the second positioning component 5 fit together and abut against each other, realizing zero-gap positioning of the mounting plate 3.

[0025] In this embodiment, both the first positioning element 4 and the second positioning element 5 are positioning pins.

[0026] The combined drive mechanism 6 includes a connecting rod 7 driven by the drive mechanism and capable of reciprocating between the upper and lower edges of the target object, and a clamping drive component 8 mounted on the connecting rod 7. The piston end of the clamping drive component 8 is positioned facing the edge of the target object and can clamp and release under external force.

[0027] In detail, four sets of clamping drive components 8 are evenly distributed on the connecting rod 7. The driving clamping component 8 includes a clamping drive element 81 connected to the connecting rod and a clamping element 82 connected to the drive end of the clamping drive element 81. The clamping drive element 81 is a miniature pneumatic cylinder, with the cylinder body fixed to the connecting rod 7. It can be driven quickly during operation to adapt to the clamping points of different targets. A polyurethane flexible pressure head is screwed into the piston rod end as the aforementioned clamping element 82, ensuring surface contact with the edge of the target object and avoiding indentations on the aluminum alloy frame of the target object.

[0028] The fixed platform 1 is also equipped with a movable support 9 in the middle. The movable support 9 can move along the X-axis (horizontal) direction of the fixed platform 1. When the target object is installed and positioned, the movable support 9 is located under the target object to support the entire target object and prevent the target object from deforming during processing.

[0029] The following is the clamping process for an irregularly shaped target object 100 with a positioning groove on each of its left and right edges: S1: Move the right mounting plate 3 until it is in contact with the second positioning piece 5 in the middle; S2: Place the target object 100 flat on the fixed platform 1, and make the left and right positioning slots respectively fit into the corresponding first positioning piece 4 to complete the two-point positioning in the left and right directions; S3: External force pushes the connecting rod 7, and the connecting rod 7 drives the four sets of clamping drive components 8 to move towards the upper and lower edges of the target object 100 at the same time; S4: The solenoid valve (not shown in the figure) is energized, and compressed air enters the clamping drive 81. The flexible pressure head presses the target object 100 against the fixed platform 1, completing the four-point clamping.

[0030] The entire clamping process is quick and has high repeatability, ensuring the processing accuracy of the screen printing plate.

[0031] Example 2: Please refer to Figure 3 The device shown illustrates the clamping method for an irregularly shaped target object 200 with a third positioning element on its right bottom side. The difference from Embodiment 1 is that: S1: The mounting plate 3 moves along the guide rail pair 2 and is limited by the second positioning piece 5 at the bottom; S2: The third positioning component 52 located at the bottom right side of the target object is inserted into the positioning groove 34 of the mounting plate 3 along the guide plate 33 to form a two-point fixed positioning. S3: The clamping drive component 8 on the connecting rod 7 presses the upper and lower edges of the target object 200.

[0032] Example 3: Please refer to Figure 4The device shown illustrates the clamping method for an irregularly shaped target object 300 that lacks target object positioning holes around its perimeter. The difference from Embodiment 1 is that at least three first positioning elements 4 are provided. S1: The mounting plate 3 moves along the guide rail pair 2 and is limited by the second positioning piece 5 at the bottom; S2: A single positioning element in the first positioning element 4 engages with a single point on the right edge of the target object 300, and the other two positioning elements 54 engage with two points on the bottom edge of the target object 300, together forming a three-point positioning and fixing of the target object 300 at one point on the right side and two points on the bottom side. S3: The clamping drive component 8 on the connecting rod 7 presses the upper and lower edges of the target object 300.

[0033] It is worth noting that, based on Embodiment 1, the surface of the fixed platform 1 is silkscreened with visual scales (not shown in the figure) or positioning marks (not shown in the figure). The scales are variable based on the width of the target object, marking the Y coordinate where the mounting plate 3 needs to stop. The operator can directly push it to the corresponding mark according to the scale, without the need for additional measurement, further shortening the changeover time.

[0034] In the above embodiment, the air circuit of the clamping drive 81 is connected in parallel and equipped with a precision pressure reducing valve and a pressure gauge (not shown in the figure), which can steplessly adjust the pressure according to the wall thickness of the target object, ensuring that the printing process does not loosen and avoiding the breakage of brittle materials.

[0035] An RFID reader / writer module (not shown in the figure) can also be embedded in the T-slot of the fixed platform 1. When the mounting plate 3 reaches the target position, the built-in magnet triggers the reader / writer module to automatically read the electronic tag at the bottom of the mounting plate 3. The system compares the process parameters issued by the MES and only starts supplying air for clamping after confirming that there are no errors, thus realizing the "error prevention + data traceability" function. In the above embodiment, the existing logic control method can be used to achieve this, and the principle will not be described in detail here.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A positioning device, characterized in that, include: Fixed platform; A sliding positioning mechanism is provided on the fixed platform, and the sliding positioning mechanism can reciprocate along the longitudinal and / or transverse direction of the platform; as well as A combined drive mechanism is disposed above and / or below the platform; A positioning and clamping space is formed between the combined driving mechanism and the sliding positioning mechanism. The target object is placed in the positioning and clamping space, and the combined driving mechanism can move toward the target object and clamp the target object.

2. The positioning device as described in claim 1, characterized in that, The sliding positioning mechanism includes at least one mounting plate connected to the fixed platform, and a first positioning element fixed on the mounting plate; The fixed platform further includes a second positioning member that is fixed relative to the fixed platform and cooperates with the first positioning member, and is adapted to define the terminal position of the mounting plate.

3. The positioning device as described in claim 2, characterized in that, The combined drive mechanism includes a connecting rod and a drive clamping component mounted on the connecting rod. The connecting rod can move relative to the target object under external force. The drive end of the drive clamping component is positioned towards the edge of the target object and clamps and releases under external force.

4. The positioning device as described in claim 3, characterized in that, The mounting plate has a first working position on the right side of the fixed platform. In the first working position, the two first positioning members abut against the positioning grooves on both sides of the target object.

5. The positioning device as described in claim 3, characterized in that, The mounting plate also has a second working position on the right side of the fixed platform. In the second working position, the bottom right side of the target object has a third positioning member, which is inserted into the positioning groove on the mounting plate.

6. The positioning device as described in claim 3, characterized in that, The mounting plate also has a third working position on the right side of the fixed platform, and the first positioning element is provided with at least three; In the third working position, one of the first positioning members abuts against the right side of the target object, and the other two first positioning members abut against the bottom edge of the target object.

7. The positioning device as described in claim 2, characterized in that, The mounting plate and the fixed platform are connected by linear guide rails and slider pairs, or profile T-slots and nut pairs.

8. The positioning device as described in claim 3, characterized in that, The driving clamping component includes a clamping drive connected to the connecting rod and a clamping element connected to the drive end of the clamping drive.

9. The positioning device as described in claim 8, characterized in that, The clamping drive is a pneumatic cylinder, the cylinder body of which is fixed to the connecting rod, and the piston rod end of the pneumatic cylinder is provided with a replaceable flexible pressure head as the clamping element.

10. The positioning device as claimed in claim 1, characterized in that, The surface of the fixed platform is provided with visual scales or positioning marks.

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