Full-automatic welding equipment for brazing plate heat exchanger

Abstract

The utility model discloses full-automatic welding equipment for brazing a plate heat exchanger, which belongs to the technical field of welding equipment, and comprises a rack, a working table, a section bar support, a welding mechanism, a pressing mechanism and an automatic nail feeder, the working table is fixed at the top of the rack, a plurality of welding workpieces are uniformly placed at the top of the working table, and the section bar support is fixed at the bottom of the rack. A guide rail and a linear motor are movably arranged at the top of the working table, a lead screw module is fixed to the side wall of the end, close to a welding workpiece, of the linear motor, the welding mechanism and the pressing mechanism are both installed at the end, close to the welding workpiece, of the lead screw module, and a nail feeding pipe is fixed to the output end of the automatic nail feeder and connected with the welding mechanism. The welding executing mechanisms are installed on the lead screw module of the profile support, and a plurality of welding executing mechanisms can be installed according to needs under the control of different programs. The positioning tool clamp is installed below the gun head, a plurality of groove holes are formed in the tool clamp, and a plurality of welding workpieces can be placed at a time for welding.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a fully automatic welding equipment for brazing plate heat exchangers. Background Art

[0002] Stud welding technology, with its advantages of speed, reliability, simplicity, and low cost, can replace other joining processes such as riveting, drilling, manual arc welding, and brazing. It can weld carbon steel, stainless steel, aluminum, copper, and its alloys, among other metals. It is now widely used in the automotive, shipbuilding, industrial plant construction, highways, railways, bridges, towers, energy, airports, stations, power stations, sheet metal engineering, electronics, switchgear, medical equipment, food processing, home appliance manufacturing, and communications engineering sectors. With the rapid development of my country's economy and the continuous improvement of its manufacturing industry, stud welding technology is being adopted by an increasing number of companies both domestically and internationally. Furthermore, with the continuous advancement of computer technology, automation technology, and electronic and power technology, welding equipment is moving towards automation, intelligence, and digitalization. As a welding process, stud welding is naturally adapting to this trend.

[0003] A brazed plate heat exchanger (BHE) is a new type of fully automated heat exchanger constructed from a series of stacked, corrugated metal sheets. Thin rectangular channels are formed between the plates, allowing heat to be exchanged between them. Plate heat exchangers are ideal for liquid-liquid and liquid-vapor heat exchange. They feature high heat transfer coefficients, low pressure drop, compact structure, lightweight, small footprint, convenient area and process integration, versatile parts, a wide range of materials, and ease of large-scale production. They are widely used in the food, machinery, metallurgy, petrochemical, and shipbuilding industries, and have become a leading heat exchanger in urban centralized heating projects. The welding studs used to secure and install BHEs have become a crucial component. Conventional BHEs using manual stud welding guns suffer from inefficiency and limited precision, requiring manual stud insertion. Furthermore, different fixtures must be replaced for each BHE of varying specifications. Utility Model Content

[0004] The purpose of the present utility model is to provide a fully automatic welding device for brazed plate heat exchangers, so as to solve the problems raised in the above background art, such as low efficiency and low precision of the traditional manual stud welding gun for brazed plate heat exchangers, the need for manual stud insertion each time, and the need to replace different fixtures each time when encountering brazed plate heat exchangers of different specifications.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fully automatic welding equipment for brazed plate heat exchangers, comprising a frame, a work table, a profile bracket, a welding mechanism, a clamping mechanism and an automatic nail feeder, wherein the work table is fixed to the top of the frame, and a plurality of welding workpieces are evenly placed on the top of the work table. A guide rail and a linear motor are movably provided on the top of the work table, and a screw module is fixed to the side wall of the linear motor close to one end of the welding workpiece. The welding mechanism and the clamping mechanism are both installed on one end of the screw module close to the welding workpiece. A nail feeding tube is fixed to the output end of the automatic nail feeder, and the nail feeding tube is connected to the welding mechanism.

[0006] As a further solution of the present invention: the welding mechanism is composed of a screw nut mounting plate, a cylinder connecting plate, a slide cylinder, an insulating plate, a stroke-adjustable cylinder, a welding gun body, a gun core, and a gun head. The welding actuator is fixed on the screw module, and the screw module is fixed on the profile bracket.

[0007] As a further solution of the present invention: the welding gun body is connected to the slide cylinder through an insulating plate, the slide cylinder is installed on the cylinder connecting plate, and the cylinder connecting plate is connected to the screw nut seat connecting plate.

[0008] As a further solution of the present invention: the stroke-adjustable cylinder is fixed on the insulating plate, and the gun core is inserted between the gun bodies to make up-and-down axial movements.

[0009] As a further solution of the present invention: the gun core is equipped with a metal cable connector and is connected to the nail feeding tube. The front end of the gun core is provided with a thread, and the locking nut is used to fasten the chuck to the end position of the gun core. The positioning fixture is installed under the gun head, and the brazed plate heat exchanger is placed on the fixture.

[0010] As a further solution of the present invention: the clamping mechanism is installed on both sides of the gun body, and the clamping mechanism includes a cylinder fixing seat, which is installed on the screw nut mounting plate. A downward pressure cylinder is fixed on the inner side of the cylinder fixing seat, and a linear bearing seat is fixed on the outer side of the cylinder fixing seat. A sliding guide rod is provided at the output end of the linear bearing seat.

[0011] As a further solution of the present invention: the sliding guide rod moves axially simultaneously with the cylinder in the linear bearing seat, an insulating connecting plate is fixed to the end of the sliding guide rod away from the linear bearing seat, a downward pressing conductive rod is fixed to the output end of the downward pressing cylinder, and the insulating connecting plate is connected to the downward pressing conductive rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the welding actuator is installed on the screw module of the profile bracket, and under different program controls, multiple welding actuators can be installed as needed.

[0013] The positioning fixture is installed under the gun head. There are multiple slots on the fixture, which can place multiple welding workpieces for welding at one time.

[0014] The downward pressure cylinders on both sides of the gun body drive the pressure rods to press down at the same time, and the welding workpiece is pressed steadily, and the next welding action can be carried out. When using a conventional manual stud welding gun, workers need to manually hold the gun and aim at the workpiece for welding, which is inefficient and has low accuracy, and the workers' workload is greatly increased.

[0015] For brazed plate heat exchangers of different specifications, it is only necessary to replace the fixtures of different specifications and adjust the corresponding parameter values ​​to weld the brazed plate heat exchangers of different specifications.

[0016] There is no need to manually insert nails. The nail feeding system feeds nails to the welding actuator, which greatly improves work efficiency and reduces the workload of staff.

[0017] It is easy to operate, simple to assemble, and has improved precision, which ensures the quality of the welded workpiece while greatly improving the overall welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of a fully automatic welding device for brazing plate heat exchangers according to the present invention;

[0019] Figure 2 This is a structural diagram of a welding mechanism and a pressing mechanism in a fully automatic welding device for brazing plate heat exchangers according to the present invention;

[0020] Figure 3 This utility model is a fully automatic welding equipment for brazing plate heat exchanger Figure 2 A magnified schematic diagram of the structure at point A.

[0021] In the figure: 1. Frame; 2. Work surface; 3. Welding workpiece; 4. Welding mechanism; 41. Sensor fixing plate; 42. Detection sensor; 43. Stroke-adjustable cylinder; 44. Insulation plate; 45. Gun core; 46. Nail feed pipe joint; 47. Gun core clamp block; 48. Locking nut; 49. Chuck; 410. Slide cylinder; 411. Cylinder connecting plate; 5. Clamping mechanism; 51. Screw nut seat mounting plate; 52. Ground connection block; 53. Cylinder fixing seat; 54. Sliding guide rod; 55. Linear bearing seat; 56. Insulation connection plate; 57. Pressing cylinder; 58. Pressing conductive rod; 6. Automatic nail feeder. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0024] In the description of the present invention, it should be understood that the terms "center", "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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] See also Figures 1 to 3 In an embodiment of the utility model, a fully automatic welding device for a brazed plate heat exchanger includes a frame 1, a work table 2, a profile bracket, a welding mechanism 4, a pressing mechanism 5 and an automatic nail feeder 6. The work table 2 is fixed to the top of the frame 1. A plurality of welding workpieces 3 are evenly placed on the top of the work table 2. A guide rail and a linear motor are movably provided on the top of the work table 2. A screw module is fixed to the side wall of the linear motor near one end of the welding workpiece 3. The welding mechanism 4 and the pressing mechanism 5 are both installed at one end of the screw module near the welding workpiece 3. A nail feeding tube is fixed to the output end of the automatic nail feeder 6, and the nail feeding tube is connected to the welding mechanism 4.

[0027] The welding mechanism 4 consists of a screw-nut mounting plate, a cylinder connecting plate 411, a slide cylinder 410, an insulating plate 44, an adjustable-stroke cylinder 43, a welding gun body, a gun core 45, and a gun head. The welding actuator is fixed to the screw module, which is fixed to the profile bracket. The welding gun body is connected to the slide cylinder 410 via the insulating plate 44. The slide cylinder 410 is mounted on the cylinder connecting plate 411, which is connected to the screw-nut seat connecting plate. The adjustable-stroke cylinder 43 is fixed to the insulating plate 44. The gun core 45 is inserted between the gun body and moves axially up and down. The gun core 45 is equipped with a metal cable connector and connected to the nail feed tube. The front end of the gun core 45 is threaded, and a locking nut 48 secures the chuck 49 to the end of the gun core 45. A positioning fixture is installed below the gun head, and the brazed plate heat exchanger is placed on the fixture.

[0028] Preferably, in this embodiment, a sensor fixing plate 41 is further provided at the top of the welding mechanism 4 , and a detection sensor 42 is fixed on the sensor fixing plate 41 . During operation, the welding position is detected by the detection sensor 42 .

[0029] Among them, a gun core clamp 47 is fixed on the end of the welding mechanism 4 close to the gun core 45, and the gun core 45 is fixedly connected to the gun core clamp 47 through a penetration, and a nail feeding pipe joint 46 is fixed on one end of the gun core clamp 47, and the nail feeding pipe joint 46 is connected to the gun core 45 through the end close to the gun core 45, and is connected to the nail feeding pipe through the nail feeding pipe and the nail feeding pipe joint 46, ensuring that the automatic nail feeder 6 can deliver the welding nails into the gun core 45.

[0030] The clamping mechanism 5 is mounted on both sides of the gun body and includes a cylinder mounting base 53, which is mounted on a screw nut mounting plate. A downward-pressing cylinder 57 is fixed to the inside of the cylinder mounting base 53, and a linear bearing base 55 is fixed to the outside of the cylinder mounting base 53. A sliding guide rod 54 is provided at the output end of the linear bearing base 55. The sliding guide rod 54 moves axially simultaneously with the cylinder within the linear bearing base 55. An insulating connecting plate 56 is fixed to the end of the sliding guide rod 54 away from the linear bearing base 55. A downward-pressing conductive rod 58 is fixed to the output end of the downward-pressing cylinder 57, and the insulating connecting plate 56 is connected to the downward-pressing conductive rod 58.

[0031] Preferably, in this embodiment, a screw nut seat mounting plate 51 is further provided at the top of the clamping mechanism 5, the screw nut seat mounting plate 51 is fixedly connected to the screw module, and a bottom line connecting plate 52 is fixed to one end of the screw nut seat mounting plate 51.

[0032] When the program starts, the cylinders on both sides drive the conductive rod 58 downward, compressing the workpiece 3 and simultaneously conducting electricity. The automatic nail feeder 6 is activated, and the nails pass through the nail feed tube to the head of the gun core 45. The adjustable-stroke cylinder 43 then moves downward, pushing the nails to the corresponding position in the chuck 49. Pressing the start button allows the welding of multiple workpieces on the fixture to proceed sequentially. For brazed plate heat exchangers of varying specifications, simply inputting the corresponding parameter values ​​allows this automated equipment to complete the welding process.

[0033] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0034] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A fully automatic welding device for brazing plate heat exchangers, comprising a frame (1), a work surface (2), a profile support, a welding mechanism (4), a pressing mechanism (5) and an automatic nail feeder (6), characterized in that: The work surface (2) is fixed to the top of the frame (1), and a plurality of welding workpieces (3) are evenly placed on the top of the work surface (2). A guide rail and a linear motor are movably provided on the top of the work surface (2). A screw module is fixed to the side wall of the linear motor close to one end of the welding workpiece (3). The welding mechanism (4) and the clamping mechanism (5) are both installed on one end of the screw module close to the welding workpiece (3). A nail feeding tube is fixed to the output end of the automatic nail feeder (6), and the nail feeding tube is connected to the welding mechanism (4).

2. The fully automatic welding equipment for brazed plate heat exchangers according to claim 1, characterized in that: The welding mechanism (4) is composed of a screw nut mounting plate, a cylinder connecting plate (411), a slide cylinder (410), an insulating plate (44), a stroke-adjustable cylinder (43), a welding gun body, a gun core (45), and a gun head. The welding actuator is fixed to the screw module, and the screw module is fixed to the profile bracket.

3. The fully automatic welding equipment for brazed plate heat exchangers according to claim 2, characterized in that: The welding gun body is connected to the slide cylinder (410) via an insulating plate (44); the slide cylinder (410) is mounted on a cylinder connecting plate (411); and the cylinder connecting plate (411) is connected to a screw nut seat connecting plate.

4. The fully automatic welding equipment for brazed plate heat exchangers according to claim 2, characterized in that: The stroke-adjustable cylinder (43) is fixed on the insulating plate (44), and the gun core (45) is inserted between the gun bodies and moves axially up and down.

5. The fully automatic welding equipment for brazed plate heat exchangers according to claim 2, characterized in that: The gun core (45) is provided with a metal cable connector and is connected to the nail feeding tube. The front end of the gun core (45) is provided with a thread, and a locking nut (48) is used to fasten the chuck (49) to the end position of the gun core (45). A positioning fixture is installed below the gun head, and the brazed plate heat exchanger is placed on the fixture.

6. The fully automatic welding equipment for brazed plate heat exchangers according to claim 1, characterized in that: The clamping mechanism (5) is installed on both sides of the gun body, and the clamping mechanism (5) includes a cylinder fixing seat (53), the cylinder fixing seat (53) is installed on the screw nut mounting plate, a downward pressure cylinder (57) is fixed on the inner side of the cylinder fixing seat (53), a linear bearing seat (55) is fixed on the outer side of the cylinder fixing seat (53), and a sliding guide rod (54) is provided at the output end of the linear bearing seat (55).

7. The fully automatic welding equipment for brazed plate heat exchangers according to claim 6, characterized in that: The sliding guide rod (54) moves axially simultaneously with the cylinder in the linear bearing seat (55), and an insulating connecting plate (56) is fixed to one end of the sliding guide rod (54) away from the linear bearing seat (55), and a downward pressing conductive rod (58) is fixed to the output end of the downward pressing cylinder (57), and the insulating connecting plate (56) is connected to the downward pressing conductive rod (58).

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