Welding clamping device

Abstract

The utility model provides a welding clamping device. The welding clamping device comprises a lower clamping plate and an upper clamping plate. Wherein the upper clamping plate comprises a main body part and an upper clamping arm, a mounting hole is formed in the main body part, and the main body part is connected with an air cylinder piston rod through a threaded piece; one end of the upper clamping arm is connected with the main body part, the other end of the upper clamping arm is provided with an upper clamping part, and the bottom of the upper clamping part is lower than the upper clamping arm; the lower clamping plate comprises an installation block and a lower clamping arm, an installation hole is formed in the installation block, the installation block is connected with a piston rod of the other air cylinder through a threaded piece, one end of the lower clamping arm is connected with the installation block, the other end of the lower clamping arm is provided with a lower clamping part, the lower clamping part is higher than the lower clamping arm, and the upper clamping part and the lower clamping part are vertically aligned. According to the welding clamping device, the protruding upper clamping part and the protruding lower clamping part are used for clamping and fixing the flexible FPC, backlight welding of an LCD is facilitated, and the connection quality and reliability of the FPC and the LCD are improved.

Description

Technical Field

[0001] The utility model relates to the field of fixtures and tools, in particular to a welding clamping device. Background Art

[0002] Flexible Printed Circuit (FPC) is a printed circuit board with high reliability and excellent flexibility. It is widely used in the electronics industry for its excellent properties such as light weight, thin thickness, and free bending and folding. The connection between FPC and liquid crystal display (LCD) is a common electronic assembly method, and its purpose is to provide backlight and signal transmission for LCD. There are many ways to connect FPC and LCD, one of which is through welding, that is, the gold finger on the FPC is connected to the pad on the LCD, and then welded by heat pressing or laser to form a firm electrical connection.

[0003] However, the prior art provides some FPC and LCD welding devices and methods. However, due to the thinness and flexibility of the flexible FPC itself, the traditional clamps cannot firmly clamp the FPC, resulting in the FPC being easily loosened during welding, which in turn causes the welding to be offset. Utility Model Content

[0004] The utility model aims to provide a welding clamping device to solve the technical problem that the traditional clamp cannot clamp the soft FPC firmly, thinly and easily causes the FPC to become loose during welding, thus affecting the welding accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a welding clamping device, the welding clamping device comprises:

[0006] An upper clamping plate, the upper clamping plate comprises a main body and an upper clamping arm, the main body is provided with a mounting hole, the main body is connected to the cylinder piston rod through a threaded member; one end of the upper clamping arm is connected to the main body, the other end of the upper clamping arm is provided with an upper clamping portion, and the bottom height of the upper clamping portion is lower than the height of the upper clamping arm;

[0007] The lower clamping plate includes a mounting block and a lower clamping arm, the mounting block is provided with a mounting hole, the mounting block is connected to the piston rod of another cylinder through a threaded member, one end of the lower clamping arm is connected to the mounting block, and the other end of the lower clamping arm is provided with a lower clamping portion, the height of the lower clamping portion is higher than the height of the lower clamping arm, and the upper clamping portion is aligned with the lower clamping portion up and down.

[0008] In one embodiment, the clamping surfaces of the upper clamping portion and the lower clamping portion are both provided with a wave-shaped structure.

[0009] In one embodiment, the upper clamping plate and the lower clamping plate are both made of pre-hardened plastic mold steel.

[0010] In one embodiment, the upper clamping arms are disposed on both sides of the main body, and the lower clamping arms are also disposed on both sides of the mounting block.

[0011] In one embodiment, the upper clamping plate is U-shaped, and the mounting block of the lower clamping plate is located in the middle of the upper clamping plate.

[0012] In one embodiment, arc-shaped chamfered structures are provided at the corners of the upper clamping plate and the lower clamping plate.

[0013] One or more of the above technical solutions in the embodiments of the present utility model have at least the following technical effects or advantages:

[0014] The welding clamping device provided by the embodiment of the utility model clamps and fixes the flexible FPC by using the protruding upper clamping part and the lower clamping part, so as to facilitate the backlight welding of the LCD, and improve the connection quality and reliability of the FPC and the LCD. And the relative movement of the upper and lower clamping plates driven by the cylinder realizes the automatic alignment and clamping of the FPC and the LCD, simplifies the operation process, and improves the production efficiency; in addition, by adjusting the stroke and pressure of the cylinder, the clamping force of the upper and lower clamping plates can be controlled to avoid damage to the FPC and the LCD, and meet the welding requirements of FPCs and LCDs of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of the upper clamping plate provided in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the structure of the lower clamping plate provided in an embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of a welding clamping device provided in an embodiment of the utility model.

[0019] The respective reference numerals are as follows:

[0020] 1. Upper clamping plate; 2. Lower clamping plate; 11. Main body; 12. Upper clamping arm; 21. Mounting block; 22. Lower clamping arm; 121. Upper clamping part; 221. Lower clamping part; 1211. Wave-shaped structure. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figures 1 to 3The embodiment of the present application provides a welding clamping device, including a lower clamping plate 2 and an upper clamping plate 1. The upper clamping plate 1 includes a main body 11 and an upper clamping arm 12, the main body 11 is provided with a mounting hole, and the main body 11 is connected to the cylinder piston rod through a screw; one end of the upper clamping arm 12 is connected to the main body 11, and the other end of the upper clamping arm 12 is provided with an upper clamping portion 121, and the bottom height of the upper clamping portion 121 is lower than the height of the upper clamping arm 12; the lower clamping plate 2 includes a mounting block 21 and a lower clamping arm 22, the mounting block 21 is provided with a mounting hole, and the mounting block 21 is connected to the piston rod of another cylinder through a screw, one end of the lower clamping arm 22 is connected to the mounting block 21, and the other end of the lower clamping arm 22 is provided with a lower clamping portion 221, the height of the lower clamping portion 221 is higher than the height of the lower clamping arm 22, and the upper clamping portion 121 is aligned with the lower clamping portion 221.

[0026] When the FPC needs to be clamped, the FPC only needs to be placed between the upper clamping portion 121 and the lower clamping portion 221, and the upper clamping plate 1 is pressed downward by the cylinder to press the upper clamping portion 121 and the lower clamping portion 221 together to clamp the FPC. In addition, since the upper clamping portion 121 / lower clamping portion 221 is more prominent than the upper clamping arm 12 and the lower clamping arm 22, when clamping, the pressing point of the lower clamping plate 2 and the upper clamping plate 1 is the area where the upper clamping portion 121 and the lower clamping portion 221 are located, and the two are not in contact at other positions, so as to concentrate the pressing force on the upper clamping portion 121 / lower clamping portion 221 to clamp the FPC.

[0027] In one embodiment, a wave-shaped structure 1211 is provided on the clamping surface of the upper clamping portion 121 and the lower clamping portion 221. The wave-shaped structure 1211 can improve the stability and reliability of clamping the FPC and prevent the workpiece from sliding or deflecting during the processing.

[0028] In one embodiment, the upper clamping plate 1 and the lower clamping plate 2 are both made of pre-hardened plastic mold steel.

[0029] In one embodiment, upper clamping arms 12 are provided on both sides of the main body 11, and lower clamping arms 22 are also provided on both sides of the mounting block 21. By respectively providing two upper clamping arms 12 and two lower clamping arms 22 on the upper clamping plate 1 and the lower clamping plate 2, the clamping device can clamp two FPCs at the same time, and then the two FPCs can be welded at the same time, thereby improving welding efficiency.

[0030] In one embodiment, the upper clamping plate 1 is U-shaped, and the mounting block 21 of the lower clamping plate 2 is located in the middle of the upper clamping plate 1. By arranging the mounting block 21 of the lower clamping plate 2 in the middle of the upper clamping plate 1, the occupied space of the clamping device is reduced.

[0031] In one embodiment, arc chamfer structures are provided at the corners of the upper clamping plate 1 and the lower clamping plate 2. By providing arc chamfer structures at the corners of the upper clamping plate 1 and the lower clamping plate 2, the upper clamping plate 1 and the lower clamping plate 2 are prevented from being broken due to stress concentration during the clamping process, thereby improving the strength of the upper clamping plate 1 and the lower clamping plate 2.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding clamping device, characterized in that: The welding clamping device comprises: An upper clamping plate, the upper clamping plate comprises a main body and an upper clamping arm, the main body is provided with a mounting hole, the main body is connected to the cylinder piston rod through a threaded member; one end of the upper clamping arm is connected to the main body, the other end of the upper clamping arm is provided with an upper clamping portion, and the bottom height of the upper clamping portion is lower than the height of the upper clamping arm; The lower clamping plate includes a mounting block and a lower clamping arm, the mounting block is provided with a mounting hole, the mounting block is connected to the piston rod of another cylinder through a threaded member, one end of the lower clamping arm is connected to the mounting block, and the other end of the lower clamping arm is provided with a lower clamping portion, the height of the lower clamping portion is higher than the height of the lower clamping arm, and the upper clamping portion is aligned with the lower clamping portion up and down.

2. A welding clamping device according to claim 1, characterized in that: The clamping surfaces of the upper clamping part and the lower clamping part are both provided with a wave-shaped structure.

3. A welding clamping device according to claim 1, characterized in that: The upper clamping plate and the lower clamping plate are both made of pre-hardened plastic mold steel.

4. A welding clamping device according to claim 1, characterized in that: The upper clamping arms are disposed on both sides of the main body, and the lower clamping arms are also disposed on both sides of the mounting block.

5. A welding clamping device according to claim 1, characterized in that: The upper clamping plate is U-shaped, and the mounting block of the lower clamping plate is located in the middle of the upper clamping plate.

6. A welding clamping device according to claim 1, characterized in that: The corner positions of the upper clamping plate and the lower clamping plate are both provided with arc chamfered structures.

Images