Pneumatic fixture for laser processing of screen printing plates

Abstract

The present invention relates to a pneumatic clamp for laser processing of a screen printing plate, comprising a screen frame, a processing base plate and an adapter plate, wherein the screen frame is installed on the top of the adapter plate, the adapter plate is a U-shaped frame structure, the adapter plate is clamped on the outer side of the processing base plate, an air path block, a precision regulating valve, a plurality of pneumatic clamping mechanisms and a plurality of adjustable top screws are installed in the processing base plate, the air path block is connected to a plurality of pneumatic clamping mechanisms after positive pressure air is introduced through the precision regulating valve, and the pneumatic clamping mechanisms and the adjustable top screws are both installed on the side positions of the bottom of the processing base plate. The present invention adopts a fixing method of the adapter plate, which solves the time-consuming problem of frequent size changes of the screen frame, reduces the direct force of the clamping force on the screen frame, thereby greatly reducing the deformation of the screen frame, overcoming the problem of screen frame offset caused by inertia during platform movement, and improving the yield of the laser processed screen plate.

Description

Technical Field

[0001] The invention relates to the technical field related to screen printing plate processing, in particular to a pneumatic clamp for laser processing of screen printing plates. Background Art

[0002] Screen printing has the advantages of large batches, low prices, bright colors, long shelf life, and fast delivery. It is recognized by more and more industries, widely used, and closely related to our lives. In order to meet the needs of screen printing, people urgently need a screen with long life and good stability, so the screen called "metal screen" in the industry was born. Although it is more expensive and less elastic, its consistency and unlimited use characteristics reduce the cost overall. And the correct stretching and printing technology can make up for the shortcomings of poor elasticity.

[0003] The screen is applied on the screen frame. When processing the screen with laser, the entire screen frame must be fixed on the processing platform, accurately positioned by the imaging system, and then cut. In order to ensure the dimensional accuracy of the processing, there must be no relative displacement between the screen frame and the platform during the processing, so the flatness and clamping force of the platform are required to be high. This patent is for fixing the screen frame for screen processing equipment, solving the problem of screen flatness, clamping the screen frame and preventing the screen frame and screen from deforming, and clamping efficiency.

[0004] In addition, the current screen frame sizes are mainly 450*450 and 356*356, but the screen frame specifications are often switched frequently at the production site. Each switch of the screen frame requires the replacement of the fixture, which is time-consuming and labor-intensive.

[0005] In view of the above-mentioned defects, the designers actively carried out research and innovation in order to create a pneumatic clamp for laser processing of screen printing plates to make it more valuable for industrial use. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a pneumatic clamp for laser processing of screen printing plates.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] The pneumatic fixture for laser processing of screen printing plates includes a screen frame, a processing base plate and an adapter plate. The screen frame is installed on the top of the adapter plate. The adapter plate is a U-shaped frame structure. The adapter plate is clamped on the outer side of the processing base plate. An air manifold, a precision regulating valve, a plurality of pneumatic clamping mechanisms and a plurality of adjustable top screws are installed in the processing base plate. Positive pressure air is introduced into the air manifold through the precision regulating valve and then connected to a plurality of pneumatic clamping mechanisms. The pneumatic clamping mechanisms and the adjustable top screws are both installed on the side positions of the bottom of the processing base plate.

[0009] As a further improvement of the present invention, the pneumatic clamping mechanism includes a clamping piston rod and a booster piston. The clamping piston rod is installed in a piston rod hole opened in a processing base plate. A wedge-shaped groove is opened at the bottom of the clamping piston rod. The wedge block at the top of the booster piston is located directly below the wedge-shaped groove. A sealing cover is provided on the processing base plate at the bottom of the booster piston. A clamping hole is opened on the processing base plate on the front end side of the clamping piston rod. After the front end of the clamping piston rod passes through the clamping hole, it contacts the outer adapter plate.

[0010] As a further improvement of the present invention, a plug is further provided in the piston rod hole, and the rear end of the clamping piston rod is connected to the plug via a spring.

[0011] As a further improvement of the present invention, a height difference is provided between the bottom of the adapter plate and the processing bottom plate below, and the screen surface on the screen frame contacts the supporting surface at the top of the processing bottom plate below.

[0012] As a further improvement of the present invention, the number of the pneumatic clamping mechanism and the number of the adjustable top screws are both three.

[0013] As a further improvement of the present invention, three pneumatic clamping mechanisms are respectively arranged at the middle position of the upper left corner, the lower left corner and the bottom of the processing base plate.

[0014] As a further improvement of the present invention, three adjustable top screws are respectively arranged at the middle position of the upper right corner, the lower right corner and the top of the processing bottom plate.

[0015] By means of the above scheme, the present invention has at least the following advantages:

[0016] The present invention adopts a fixing method of an adapter plate, which solves the time-consuming problem of frequent size changes of the screen frame and reduces the direct force of the clamping force on the screen frame, thereby greatly reducing the deformation of the screen frame, overcoming the problem of screen frame offset caused by inertia during platform movement, and improving the yield rate of laser processing screens. The pneumatic clamping mechanism of the present invention adopts a wedge block force-enhancing mechanism, coupled with the action of a piston, and provides a clamping force that satisfies the stability of the screen frame through precise adjustment of the pressure by a precision pressure regulating valve.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the pneumatic fixture for laser processing of a screen printing plate of the present invention;

[0020] Figure 2 yes Figure 1 A top view of

[0021] Figure 3 yes Figure 1 Schematic diagram of the internal structure;

[0022] Figure 4 yes Figure 3 A local enlarged schematic diagram of point I in the middle.

[0023] The meanings of the various reference numerals in the figures are as follows.

[0024] 1 screen frame 2 processing base plate

[0025] 3 adapter plate 4 gas manifold

[0026] 5Precision control valve 6Pneumatic clamping mechanism

[0027] 7 Adjustable top screw 61 clamps the piston rod

[0028] 62 limit pin 63 spring

[0029] 64 plug 65 booster piston

[0030] 66 Sealing cover DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiment of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0033] Example

[0034] like Figure 1 to Figure 4 As shown,

[0035] The pneumatic clamp for laser processing of screen printing plate comprises a screen frame 1, a processing base plate 2 and an adapter plate 3. The screen frame 1 is installed on the top of the adapter plate 3. The adapter plate 3 is a U-shaped frame structure. The adapter plate 3 is clamped on the outer side of the processing base plate 2. The processing base plate 2 is installed with an air path block 4, a precision regulating valve 5, a plurality of pneumatic clamping mechanisms 6 and a plurality of adjustable top screws 7. The air path block 4 is connected to a plurality of pneumatic clamping mechanisms 6 after positive pressure air is introduced through the precision regulating valve 5. The pneumatic clamping mechanisms 6 and the adjustable top screws 7 are both installed on the side of the bottom of the processing base plate 2. Among them, the adjustable top screw 7 is a conventional adjustable top screw structure in the art.

[0036] Preferably, the pneumatic clamping mechanism 6 includes a clamping piston rod 61 and a booster piston 65. The clamping piston rod 61 is installed in a piston rod hole opened in the processing base plate 2. A wedge-shaped groove is opened at the bottom of the clamping piston rod 61. The wedge block on the top of the booster piston 65 is located directly below the wedge-shaped groove. A sealing cover 66 is provided on the processing base plate 2 at the bottom of the booster piston 65. A clamping hole is opened on the processing base plate 2 on one side of the front end of the clamping piston rod 61. After the front end of the clamping piston rod 61 passes through the clamping hole, it contacts the outer adapter plate 3.

[0037] Preferably, a plug 64 is further provided in the piston rod hole, and the rear end of the clamping piston rod 61 is connected to the plug 64 via a spring 63 .

[0038] Preferably, a height difference is provided between the bottom of the adapter plate 3 and the processing bottom plate 2 below, and the screen surface on the screen frame 1 contacts the supporting surface at the top of the processing bottom plate 2 below.

[0039] Preferably, the number of the pneumatic clamping mechanism 6 and the number of the adjustable top screws 7 are both three.

[0040] Preferably, the three pneumatic clamping mechanisms 6 are respectively arranged at the middle position of the upper left corner, the lower left corner and the bottom of the processing base plate 2.

[0041] Preferably, three adjustable top screws 7 are respectively arranged at the middle position of the upper right corner, the lower right corner and the top of the processing bottom plate 2.

[0042] The present invention first fixes the screen frame 1 on the compatible adapter plate 3 with screws in advance, and then clamps the adapter plate 3 through the pneumatic clamping mechanism 6, so that the clamping force does not directly act on the screen frame 1. The pneumatic clamping mechanism 6 can ensure a stable pneumatic clamping force, and the clamping force can be adjusted through the control of the precision pressure regulating valve 5, and the force amplification mechanism can provide a stable clamping force for the screen frame 1.

[0043] The present invention fully utilizes the stability and holding force of the pneumatic clamping mechanism 6 to solve the technical problem that the screen frame 1 is deformed due to excessive clamping force and the screen frame 1 is deflected due to insufficient clamping force.

[0044] Positional relationship and connection relationship between components: adapter plate 3 is connected to screen frame 1 with screws, gas path block 4 and precision pressure regulating valve 5 are fixed on processing base plate 2 with screws, and clamping mechanism 6 is installed on processing base plate 2 with screws. Figure 2 The three positions on the processing base plate 2 are provided with adjustable top screws 7 on the opposite sides of the three positions; the connection relationship of the clamping mechanism 6 is as follows: the clamping piston rod 61 is first inserted into the hole of the processing base plate 2, then the spring 63 is sleeved on the tail of the clamping piston rod 61, and then the spring 63 is blocked by the plug 64, the booster piston 65 is installed in the processing base plate 2, and then the sealing cover 66 is fixed to the processing base plate 2 at the position of Figure 2 During this process, grease and sealing rings need to be added, and finally the limit pin 62 is inserted into the clamping piston rod 61.

[0045] The working principle and working process of the present invention are as follows: the screen frame 1 with the screen attached is first fixed on the adapter plate 3, and then the adapter plate 3 with the screen frame 1 fixed is stably placed on the processing base plate 2. Since there is a height difference between the supporting surface of the processing base plate 2 and the adapter plate 3, the bottom surface of the adapter plate 3 will not contact the processing base plate 2, but the screen surface of the screen frame 1 directly contacts the upper surface of the processing base plate 2, so that the entire screen surface is flattened by the deadweight of the screen frame 1, and then the positive pressure gas is introduced into the gas path block 4, and then connected to the precision pressure regulating valve 5 respectively. Figure 2 The positions of the three pneumatic clamping mechanisms 6 are shown. After positive pressure air is introduced into the pneumatic clamping mechanisms 6, the booster piston 65 rises under the action of the air pressure, and the clamping piston rod 61 is pushed by the booster action of the wedge block. The clamping piston rod 61 extends out of the processing base plate 2, and supports the adapter plate 3 from three positions. At the same time, the adjustable top screw 7 supports the adapter plate 3 on the other side, thereby clamping the adapter plate 3 from the inside to the outside, and finally completing the clamping process of the screen frame 1.

[0046] The use of adapter plates for fixing not only solves the time-consuming problem of frequent size changes of the screen frame, but also reduces the direct force of the clamping force on the screen frame, thereby greatly reducing the deformation of the screen frame, overcoming the problem of screen frame offset caused by inertia during platform movement, and improving the yield rate of laser processing screens. The pneumatic clamping mechanism uses a wedge-type force-enhancing mechanism, coupled with the action of the piston, and provides a stable clamping force for the screen frame through the precise adjustment of the pressure by the precision pressure regulating valve.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly referring to the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. Pneumatic fixture for laser processing of screen printing plates, characterized in that: It comprises a screen frame (1), a processing base plate (2) and an adapter plate (3), wherein the screen frame (1) is installed on the top of the adapter plate (3), the adapter plate (3) is a U-shaped frame structure, the adapter plate (3) is clamped on the outer side of the processing base plate (2), the processing base plate (2) is installed with an air path block (4), a precision regulating valve (5), a plurality of pneumatic clamping mechanisms (6) and a plurality of adjustable top screws (7), the air path block (4) is introduced with positive pressure air through the precision regulating valve (5) and then connected to the plurality of pneumatic clamping mechanisms (6), the pneumatic clamping mechanisms (6) and the adjustable top screws (7) are both installed on the side of the bottom of the processing base plate (2); The pneumatic clamping mechanism (6) comprises a clamping piston rod (61) and a booster piston (65), wherein the clamping piston rod (61) is installed in a piston rod hole provided in a processing base plate (2), a wedge-shaped groove body is provided at the bottom of the clamping piston rod (61), a wedge block at the top of the booster piston (65) is located directly below the wedge-shaped groove body, a sealing cover (66) is provided on the processing base plate (2) at the bottom of the booster piston (65), a clamping hole is provided on the processing base plate (2) at one side of the front end of the clamping piston rod (61), and the front end of the clamping piston rod (61) contacts the outer adapter plate (3) after passing through the clamping hole; A height difference is provided between the bottom of the adapter plate (3) and the processing bottom plate (2) below, and the screen surface on the screen frame (1) is in contact with the support surface at the top of the processing bottom plate (2) below.

2. The pneumatic fixture for laser processing of screen printing plates according to claim 1, characterized in that: A plug (64) is also provided in the piston rod hole, and the rear end of the clamping piston rod (61) is connected to the plug (64) via a spring (63).

3. The pneumatic fixture for laser processing of screen printing plates according to claim 1, characterized in that: The number of the pneumatic clamping mechanisms (6) and the number of the adjustable top screws (7) are both three.

4. The pneumatic fixture for laser processing of screen printing plates as claimed in claim 3, characterized in that: The three pneumatic clamping mechanisms (6) are respectively arranged at the upper left corner, the lower left corner and the middle position of the bottom of the processing base plate (2).

5. The pneumatic fixture for laser processing of screen printing plates as claimed in claim 3, characterized in that: The three adjustable top screws (7) are respectively arranged at the middle position of the upper right corner, the lower right corner and the top of the processing bottom plate (2).

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