Welding tool for welding plates

Abstract

The welding tool comprises a bottom guide rail, a movable movable die is installed on the bottom guide rail in a guiding mode, a liftable fixed die is erected at one end of the bottom guide rail, a first positioning groove used for clamping the bottom layer plate is formed in the upper end face of the movable die, and a second positioning groove used for clamping the bottom layer plate is formed in the lower end face of the movable die. The bottom end face of the fixed die is provided with a second positioning groove used for clamping an upper-layer plate, the fixed die is provided with open holes facilitating welding of corner holes in the plate, the open holes correspond to the corner holes in a one-to-one mode, and the diameter of the open holes is larger than that of the corner holes. The automatic plate welding machine is reasonable in structural design and stable in operation, achieves automatic operation of plate welding through cooperative work of the fixed rail, the movable die, the fixed die, the hydraulic device and the electromagnetic device, has the advantages of being high in welding quality, high in production efficiency, high in automation degree and the like, and can effectively reduce production cost and meet welding requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production and processing technical field of half-welded plate heat exchanger, and particularly relates to a welding tool for welding a plate. BACKGROUND

[0002] With the development of heat exchange equipment, the half-welded plate heat exchanger is applied more and more, and the structure is that two plates are combined into a plate group by laser welding, and the plate groups are sealed by rubber gaskets; currently, the tool clamp for laser welding of stainless steel plate is usually used in the production process, and such tool clamp is described in the "plate heat exchange plate laser welding process and tool control system design". The tool clamp exerts pressure on the upper and lower two plates at the edge of the plate, so that the welding parts of the two plates are tightly attached to facilitate welding.

[0003] However, with the development, the structure of the half-welded plate heat exchanger has more and more different shapes and different angle hole diameters, and the demand is also increasing, and the production unit also has higher and higher requirements for production efficiency. Welding is the most fundamental factor that limits production efficiency, and an advanced welding tool is a key factor to improve production efficiency. Although the existing tool clamp can meet the welding requirements, the local thinning and plate springback deformation rate of the titanium plate are greater than those of the stainless steel plate after pressing, and the pressure applied only at the edge of the plate cannot ensure that the plate welding parts are completely tightly attached, thereby reducing the success rate of titanium plate welding and increasing the repair cost.

[0004] For example, the angle hole position is used for medium in and out, and the angle hole welding refers to sealing these holes to ensure that the fluid does not leak, otherwise it will directly affect the sealing performance and heat transfer efficiency of the heat exchanger. If the angle hole welding is not good, it may cause leakage and reduce the efficiency of the heat exchanger, and even affect the safe operation of the equipment.

[0005] At the same time, after the angle hole welding is completed, the plate may also need to be welded around to form a complete fluid passage. The two plates still need to be pressed tightly before welding to ensure the stability of the structure of the entire heat exchanger, withstand pressure and temperature changes, and meet the welding requirements. Therefore, the existing plate welding tool structure needs to be improved. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects and deficiencies in the prior art, and provides a welding tool for welding a plate, which solves various problems in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a welding tool for welding sheet, including bottom guide rail, the movable mould of guide installation is installed on bottom guide rail, the end of bottom guide rail is erected with the fixed mould of lifting, the upper end surface of movable mould is equipped with the positioning groove one for clamping bottom sheet, the bottom end surface of fixed mould is equipped with the positioning groove two for clamping upper sheet, and fixed mould is equipped with the opening hole of facilitating sheet upper corner hole welding, the opening hole corresponds with corner hole position one to one, and the diameter is greater than the diameter of corner hole.

[0009] The bottom end of movable mould is equipped with the guide block matched with bottom guide rail, and the bottom end surface of guide block is equipped with guide groove, and the upper end surface of bottom guide rail is installed with the universal ball arranged at intervals.

[0010] The movement of movable mould is driven through the circulating conveying chain in the middle part of bottom end, cylinder or lead screw.

[0011] The upper end surface of movable mould in positioning groove one is also equipped with the positioning ring groove corresponding with sheet upper corner hole one to one.

[0012] Positioning groove two corresponds with the welding position of sheet, and is equipped with the through groove for spot welding to the sheet assembly after pressing at intervals.

[0013] Movable mould is supported and erected through the support column support of both sides of bottom guide rail, and the hydraulic rod for pushing fixed mould lifting is installed between the lower end surface of support column and fixed mould.

[0014] The upper end surface of fixed mould is installed with the electromagnetic device for tightly sucking together upper movable mould.

[0015] The electromagnetic device includes a plurality of electromagnets, and the electromagnets are distributed on the periphery and middle part of the upper end surface of fixed mould, and fixed mould and movable mould are made of magnetic conductive material.

[0016] The utility model adopts fixed track, and the welding tool movable mould is fixed on the steel structure of track, the whole steel structure is placed on the track, after starting motor button, movable mould can move left and right on the track, after sheet installation is completed, start forward button, when movable mould reaches fixed limit position, it will stop automatically, the welding tool fixed mould is placed on another fixed steel structure, movable mould will stop automatically after reaching certain position, start the hydraulic pressure relief device of fixed mould, after pressure relief, start electromagnetic device again, upper movable mould is adsorbed together through electromagnetic device, and the upper movable mould is tightly sucked together by adsorption force, and the effect of pressing sheet is achieved, the gap between sheets is guaranteed during welding process, so as to guarantee the welding quality, the four hydraulic cylinders of fixed mould hydraulic device are installed on the four corners of fixed mould, and electromagnetic device is installed on the surface of fixed mould, after the completion of robot arm welding, electromagnetic device is closed, start hydraulic device, after fixed mould is lifted to certain height, movable mould is opened again, and sheet is taken out.

[0017] Compared with the prior art, the utility model has the advantages of

[0018] The utility model discloses reasonable structure design, stable operation: the combination of fixed track and steel structure ensures the stability of equipment operation, and the accurate control of hydraulic device and electromagnetic device further enhances the reliability of equipment, and it is suitable for long time continuous operation.

[0019] Through the cooperation of fixed track, movable mould, fixed mould, hydraulic device and electromagnetic device, the automation operation of plate welding is realized, has welding quality high, production efficiency is high, the advantages such as high degree of automation, can effectively reduce production cost, satisfy welding demand.

[0020] Specific as follows:

[0021] (1) welding quality is stable and reliable: through the cooperation of electromagnetic device and hydraulic device, ensure that the plate is tightly pressed during the welding process, effectively avoid the generation of welding gap, significantly improve the welding quality, reduce the rework rate.

[0022] (2) high degree of automation, easy operation: the equipment adopts motor drive, hydraulic control and electromagnetic adsorption technology, realizes the full-process automation operation from plate installation, pressing to welding, reduces manual intervention, reduces the operation difficulty.

[0023] (3) production efficiency is greatly improved: through the cooperation of reciprocating moving structure and lifting driving mode, the equipment can quickly complete the positioning, pressing and welding of plate, significantly shorten the production cycle, improve the overall efficiency.

[0024] (4) reduce production cost: automation operation reduces the manpower demand, and the improvement of welding quality reduces the rework rate and material waste, further saves the production cost. DRAWINGS

[0025] Figure 1 It is the structure schematic view of the utility model;

[0026] Figure 2 It is Figure 1 The partial structure enlarged view of A place in;

[0027] Figure 3 It is another view structure schematic view of fixed mould.

[0028] REFERENCE NUMERALS:

[0029] 1, bottom guide rail; 2, movable mould; 3, fixed mould; 4, positioning groove one; 5, positioning groove two; 6, opening; 7, guide block; 8, guide groove; 9, universal ball; 10, positioning ring groove; 11, through groove; 12, support stand column; 13, hydraulic rod; 14, electromagnet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Referring to the drawings Figures 1-3 ;

[0032] A welding tool for welding plates, comprising a bottom guide rail 1, a movable movable die 2 is guided and installed on the bottom guide rail 1, a liftable fixed die 3 is erected at one end of the bottom guide rail 1, a positioning groove one 4 for clamping a bottom plate is arranged on the upper end surface of the movable die 2, and a positioning ring groove 10 corresponding to the upper corner hole of the plate is further arranged on the upper end surface of the movable die in the positioning groove one 4. The semi-welded heat exchanger plate (half plate) usually has four corner holes, which are respectively located at the four corners of the plate, two opposite corner holes are hot fluid inlets and outlets (such as high-temperature medium), and the other two opposite corner holes are cold fluid inlets and outlets (such as low-temperature medium). The corner hole is sealed by a gasket or welding, and the fluid forms an independent channel between adjacent plates, and the bottom plate is limited by the cooperation of the positioning ring groove and the positioning groove one, so that the stability of the clamped bottom plate is ensured. The positioning groove two 5 for clamping the upper plate is arranged on the bottom end surface of the fixed die 3, the positioning groove two 5 corresponds to the welding position of the plate, and the through groove 11 for spot welding the plate assembly after being pressed is arranged at intervals. When the upper plate is placed on the bottom plate and positioned, the upper end surface is limited by the positioning groove two on the positioning and the opening, so that the stability of the upper and lower plates is realized. And the opening 6 for welding the upper corner hole of the plate is arranged on the fixed die 3, the opening 6 corresponds to the position of the corner hole one by one, and the diameter is greater than the diameter of the corner hole.

[0033] Further, the movement of the movable die 2 is driven by the circulating conveying chain in the middle of the bottom end, the air cylinder or the lead screw. The movement driving structure only needs to be provided in the middle of the bottom guide rail, and the circulating conveying chain, the air cylinder or the lead screw of the existing structure is driven. As shown in the figure, the guide block at the lower end of the movable die is connected to drive the movable die to move in the bottom guide rail. In order to ensure that the movable die is in place, limit blocks are arranged at both ends of the bottom guide rail to limit the movement, so that the movable die can be quickly moved to the position, and the position of the movable die and the fixed die is ensured. The movable die 2 is supported and erected by the supporting column 12 on both sides of the bottom guide rail 1, and the hydraulic rod 13 for pushing the fixed die to rise and fall is arranged between the supporting column 12 and the lower end surface of the fixed die. The fixed die is lifted and lowered by the hydraulic rod, so that the fixed die is combined with the movable die.

[0034] Further, the bottom end of the movable mold 2 is provided with a guide block 7 matched with the bottom guide rail 1, the bottom end surface of the guide block 7 is provided with a guide groove 8, and the upper end surface of the bottom guide rail 1 is provided with a plurality of universal balls 9 arranged at intervals. The cooperation of the guide block and the bottom guide rail forms a precise guide system, which ensures the linear motion trajectory of the movable mold in the vertical direction such as mold opening and closing or the horizontal direction such as transverse movement. The design of the guide groove can limit the lateral deviation of the guide block, thereby improving the stability of the movement. The rolling friction between the universal ball on the upper end of the guide rail and the guide groove at the bottom end of the guide block replaces the sliding friction, thereby significantly reducing the movement resistance. Compared with the traditional slide rail structure, the service life of the guide rail and the guide block can be prolonged, and the maintenance frequency can be reduced. The contact area between the guide block and the guide rail is large, and in combination with the point contact characteristics of the universal ball, the impact force or the gravity load during the movement of the movable mold can be effectively dispersed, thereby avoiding local stress concentration and structural deformation, and ensuring the stability during the reciprocating movement.

[0035] Further, the upper end surface of the fixed mold 3 is provided with an electromagnetic device for tightly attracting the upper movable mold. The electromagnetic device includes a plurality of electromagnets 14 distributed on the periphery and the middle position of the upper end surface of the fixed mold, and the fixed mold 3 and the movable mold 2 are made of magnetic conductive material. The electromagnets on the fixed mold generate a magnetic field through electric current, thereby attracting the movable mold. The movable mold is guided by the guide block and vertically floats slightly, and is tightly attached to the fixed mold. In the tool clamp, the movable mold and the fixed mold are quickly clamped and released, and the electromagnetic device can be remotely controlled, which may be more efficient than the traditional mechanical method.

[0036] The specific work is as follows:

[0037] I. Preparation before welding

[0038] 1. Material inspection: First, the material of the plate, pipe and gasket should be checked to ensure that it is consistent with the corrosion resistance requirements of the medium in the heat exchanger, and that all parts are complete, and the model and size are consistent with the drawing;

[0039] 2. Cleaning and gluing: clean the gasket groove of the plate and remove impurities, etc.; then evenly apply adhesive in the gasket groove to ensure that there is no oil stain and that the gasket (rubber ring) is fixed well;

[0040] II. Rubber ring clamping

[0041] 1. Gasket pasting: immediately paste the gasket (rubber ring) in the gasket groove after applying the adhesive, to ensure that it is tightly attached to the gasket groove.

[0042] 2. Plate stacking: stack the plates with gaskets in order, ensuring that the corner holes of each plate are aligned.

[0043] III. Welding process

[0044] 1. Positioning and clamping

[0045] First, the two pieces of welded plate are placed on the moving die, after the plate is stacked, the moving die is driven by the motor to a certain position, touches the limiting device and stops, the hydraulic device of the fixed die is started, the fixed die slowly falls on the moving die, after the hydraulic system is relieved, the electromagnet is started, after the electromagnet is powered on, the electromagnet tightly adsorbs the upper and lower dies together, the purpose of adsorbing together is to tightly press the two plates, so as to ensure that the sealing groove, that is, the welding position, can be tightly matched together during the laser welding process, and the welding quality during the welding process is ensured;

[0046] 2. Welding

[0047] After the plate is fixed, the corner hole is welded first (welding the corner hole first can realize modular production, that is, each plate is processed with the corner hole first, then stacked quickly during assembly, and then other welding steps are performed, so as to improve the production efficiency. If other parts are welded first, more processing time may be required for each plate, or the key of corner hole welding may be that they are the inlet and outlet of medium flow, which must be sealed, otherwise leakage will cause two fluids to mix, causing safety problems or efficiency reduction);

[0048] After the corner hole is welded, the laser welding robot contacts the key points between the plates through the through slot according to the program to enhance the structural strength and sealing performance, so as to improve the production efficiency. If other parts are welded first, more processing time may be required for each plate, or adjustment during assembly will be difficult, affecting the overall production speed; after welding, the moving die button is started, the welding machine is turned off after welding, the fixed die hydraulic oil inlet button is started, the fixed die is lifted by the hydraulic cylinder, the moving die is reset, and the entire peripheral weld is welded, and finally the welded plate pair is taken out.

[0049] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.

[0050] Therefore, the above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application; that is, various equivalent transformations made within the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A welding fixture for welding a sheet, characterized by: The utility model discloses a bottom guide rail (1) is guided to install movable movable mould (2) on, the bottom guide rail (1) one end is erected with the liftable fixed mould (3), the upper end surface of movable mould (2) is equipped with the positioning slot one (4) for clamping bottom layer board piece, the bottom end surface of fixed mould (3) is used for clamping the positioning slot two (5) of upper layer board piece, and fixed mould (3) is equipped with the aperture (6) of the convenience board piece upper corner hole welding on, the aperture (6) with corner hole position one to one correspondence, and diameter is greater than corner hole diameter.

2. The welding fixture for welding a panel according to claim 1, characterized in that: The bottom end of movable mould (2) is equipped with the guide block (7) with bottom guide rail (1), the bottom end surface of guide block (7) is equipped with guide groove (8), and the upper end surface of bottom guide rail (1) is installed with the universal ball (9) of interval arrangement.

3. The welding fixture for welding a panel according to claim 1, wherein: The movement of movable mould (2) is driven through the circulating conveying chain in the middle of bottom end, cylinder or lead screw.

4. The welding tool for welding a sheet as defined in claim 1, characterized in that: The upper end surface of movable mould in positioning slot one (4) is also equipped with the positioning ring groove (10) with board piece upper corner hole one to one correspondence.

5. The welding tool for welding a sheet as defined in claim 1, characterized in that: Positioning slot two (5) corresponds with the weld position of board piece, and is equipped with the through groove (11) for the spot welding of board piece assembly after pressing in interval on.

6. The welding tool for welding a sheet as defined in claim 1, characterized in that: Movable mould (2) is supported and is erected through the support column (12) of bottom guide rail (1) both sides, and the hydraulic rod (13) of pushing fixed mould lifting is installed between support column (12) and fixed mould lower end surface.

7. The welding tool for welding a sheet as defined in claim 1, characterized in that: The upper end surface of fixed mould (3) is installed with the electromagnetic device for tightly sucking together upper movable mould.

8. The welding fixture for welding a panel according to claim 7, characterized in that: The electromagnetic device includes a plurality of electromagnets (14), and the electromagnets (14) are distributed on the periphery and the middle position of the upper end surface of the fixed mold. The fixed mold (3) and the movable mold (2) are made of magnetically conductive material.

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