Aluminum piece high-frequency welding lap joint positioning device

Abstract

The invention relates to the technical field of welding tools, in particular to an aluminum piece high-frequency welding lap joint positioning device which comprises a carrying table and a jig, and the carrying table is made of graphite; the jig is fixed to the upper end of the carrying table and provided with a plurality of rectangular notches used for containing pieces to be welded. When the to-be-welded piece is placed on the notch, the bottom and the side end face of the to-be-welded piece are attached to the upper end of the carrying table and the right-angle end face of the notch respectively, the end face, making contact with the to-be-welded piece, of the notch is in a wave shape, and the wave crest of the notch abuts against the end face of the to-be-welded piece. The heat dissipation efficiency is improved through the carrying table made of graphite, welding heat is rapidly conducted out through the high heat conductivity of the carrying table, and deformation, caused by high temperature, of an aluminum piece is reduced; the contact area between the wave-shaped notch and the to-be-welded part can be reduced by arranging the wave-shaped notch, and large-area adhesion of the to-be-welded part caused by heating is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of welding tooling, and particularly relates to a high-frequency welding lapping positioning device for aluminum parts. Background Art

[0002] In the high-frequency welding process of aluminum parts, the accuracy and stability of lapping positioning directly affect the welding quality.

[0003] In the prior art, such as the Chinese utility model patent with the patent number CN217193625U and the patent name of a high-precision welding positioning auxiliary device, it specifically discloses including a base, a first fixing component and a second fixing component. The second fixing component includes a U-shaped bottom plate. A rotating shaft is rotatably connected to the top of the U-shaped bottom plate. A second clamping member is fixedly connected to the top of the rotating shaft. A worm gear is fixedly sleeved on the outer side of the rotating shaft. A worm is in transmission cooperation with the outer side of the worm gear. One end of the worm is rotatably connected to the inner wall of the U-shaped bottom plate. The other end of the worm is fixedly connected to the output shaft of a first servo motor. The first servo motor is fixed to the top of the U-shaped bottom plate. This utility model realizes adjusting and fixing the welding angle of two parts by driving the parts fixed on the first clamping member to rotate, and then moving the second clamping member towards the first clamping member to abut against the welding end, making the welding more precise and improving the applicability of the technical solution.

[0004] However, in the above solution, since the U-shaped bottom plate and the worm and worm gear are used to adjust the clamping angle, this clamping method is prone to adhesion when the aluminum parts are exposed to high temperatures. And because it is manual operation, if the welded parts are not withdrawn in time, it is more difficult to take out when the adhered part cools down, resulting in low overall welding efficiency. Again, such as the Chinese invention patent with the publication number CN110732822A and the patent name of a positioning device for aluminum welding, it specifically discloses that a pair of lower support hydraulic cylinders are respectively arranged at the left and right parts of the bottom support frame. The cylinder barrels of the pair of lower support hydraulic cylinders are fixedly installed inside the bottom support frame. The piston rods of the pair of lower support hydraulic cylinders can slide out of the bottom support frame and are fixedly connected with a pair of bottom support plates at the upper part of the bottom support frame. The upper support frame is fixedly connected above the bottom support frame. A pair of upper support hydraulic cylinders are fixedly connected to the upper support frame and are respectively arranged corresponding to the pair of lower support hydraulic cylinders. The piston rod ends of the pair of upper support hydraulic cylinders are all arranged downward and are fixedly connected with a pair of top pressing plates that cooperate with the pair of bottom hand plates. A pair of cooling pipelines are connected to the inner sides of the pair of top pressing plates, and the water outlets of the cooling pipelines are arranged downward and are connected with atomizing nozzles. The water inlets of the cooling pipelines are connected to a water source through hoses in the technical solution.

[0005] The above solution clamps with hydraulic cylinders and is equipped with cooling pipelines, but the structure is complex and the heat dissipation efficiency is limited by the design of the atomizing nozzles, and it cannot solve the problem of fixture adhesion caused by the fast heat conduction of aluminum.

[0006] Therefore, a high-frequency welding lap positioning device for aluminum parts is needed to solve the above problems. Summary of the Invention

[0007] Technical Problem to be Solved In view of the above-mentioned drawbacks of the prior art, the present invention provides a high-frequency welding lap positioning device for aluminum parts, which can effectively solve the problem that the welding fixture in the prior art is prone to adhesion with the welded parts.

[0008] Technical Solution To achieve the above object, the present invention is realized through the following technical solutions: The present invention provides a high-frequency welding lap positioning device for aluminum parts, including a carrier table and a jig. The carrier table is made of graphite material; the jig is fixed at the upper end of the carrier table and has a plurality of rectangular notches for placing the parts to be welded. Among them, when the parts to be welded are placed on the notches, the bottom and side end faces of the parts to be welded are respectively in contact with the upper end of the carrier table and the right-angle end faces of the notches, and the end face of the notch in contact with the parts to be welded is wavy, and the wave crest thereof abuts against the end face of the parts to be welded.

[0009] Further, the jig is rectangular, and a notch is provided at each of its four corner ends.

[0010] Further, the areas of the four notches are not equal.

[0011] Further, the jig is made of steel, and a nitrided layer is formed on the end face of the jig after gas nitriding treatment.

[0012] Further, an air duct communicating with the external air is provided inside the jig, and ventilation holes communicating with the air duct are provided at the troughs of the notches.

[0013] Further, a ventilation groove communicating with the end of the air duct is provided inside the carrier table, and the ventilation groove and the air duct are separated by a filter screen.

[0014] Further, a windproof housing for preventing air in the air duct from entering is provided inside the air duct at the rear side of the trough of the notch. A partition is provided at the top of the windproof housing, and the bottom of the windproof housing communicates with the internal air flow of the air duct and is spaced from the filter screen.

[0015] Further, the end face of the windproof housing away from the parts to be welded is inclined in the direction away from the parts to be welded.

[0016] Further, an inner cavity with the bottom communicating with the internal air flow of the air duct is provided inside the windproof housing and below the partition.

[0017] Further, an air vent communicating with the interior of the inner cavity is provided above the inner cavity and below the partition plate. A valve plate is elastically hinged on the partition plate and can rotate towards the side of the air vent. When the valve plate rotates, the air vent communicates with the gas inside the air passage.

[0018] Beneficial effects The technical solution provided by the present invention has the following beneficial effects compared with the prior art: The present invention improves the heat dissipation efficiency through a carrier platform made of graphite, and uses its high thermal conductivity to quickly conduct the welding heat, reducing the deformation of the aluminum parts caused by high temperature; By providing wavy notches, the contact area with the workpiece to be welded can be reduced, preventing the workpiece to be welded from adhering in a large area due to heat; Notches with different areas are provided at the four corners of the fixture, which can fix aluminum parts of different sizes at the same time, improving the versatility of the device; The steel fixture is subjected to gas nitriding treatment to form a surface nitride layer, improving wear resistance and reducing damage to the notches caused by welding spatter; A directional air flow channel is formed through the air passage, ventilation holes and ventilation grooves, and the metal spatter is filtered by the filter screen to avoid blockage of the heat dissipation channel; The windproof housing cooperates with the valve plate to adjust the amount of input wind according to the required welding temperature. When the wind force is sufficient to drive the valve plate to rotate, the opening and closing of the air vent is adjusted to improve the heat dissipation effect. Brief description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the overall positioning device in the embodiment of the present invention; Figure 2 Top view schematic diagram of the fixture structure in the embodiment of the present invention; Figure 3 Side view schematic diagram of the fixture structure in the embodiment of the present invention; Figure 4 In the embodiment of the present invention Figure 3 Schematic diagram of the structure at position A; Figure 5 Side view sectional schematic diagram of the air passage structure in the embodiment of the present invention; Figure 6 In the embodiment of the present invention Figure 5 Schematic diagram of the structure at position B; Figure 7Schematic diagram of a partial fixture structure in an embodiment of the present invention; Figure 8 Schematic diagram of a windproof housing structure in an embodiment of the present invention; Figure 9 Schematic diagram of the internal air flow path (valve plate closed state) of the windproof housing in an embodiment of the present invention; Figure 10 Schematic diagram of the internal air flow path (valve plate rotating state) of the windproof housing in an embodiment of the present invention.

[0021] The reference numerals in the figure respectively represent: 1. Carrier table; 11. Ventilation slot; 12. Filter screen; 2. Fixture; 21. Notch; 211. Ventilation hole; 22. Air duct; 221. Windproof housing; 222. Partition board; 223. Inner cavity; 224. Ventilation port; 225. Valve plate. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0023] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the non-direct contact between the first and second features but through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is lower than that of the second feature.

[0025] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] Example: See attached Figure 1-10 , this case proposes a high-frequency welding overlap positioning device for aluminum parts, including a carrier 1 and a fixture 2. Since high heat is generated during welding, the carrier 1 used to support the workpiece is made of graphite; like Figure 1 As shown, the carrier 1 is formed by processing a whole piece of graphite, and the fixture 2 is fixed to the upper surface of the carrier 1 by bolts. The material of the fixture 2 is steel, and a nitride layer is formed on the surface after gas nitriding treatment.

[0028] A notch 21 is provided at each of the four corners of the fixture 2. The depth of the four notches 21 is the same, but the opening area increases in increments of 10mm², 15mm², 20mm², and 25mm² to accommodate aluminum parts of different specifications.

[0029] In this embodiment, the two parts to be welded are distributed vertically. When the parts to be welded are placed on the recess 21, the bottom and side end faces of the parts to be welded are respectively in contact with the upper end of the carrier 1 and the right-angle end face of the recess 21. It should be noted that before welding, it is necessary to ensure that the end faces of the two parts to be welded are in close contact with the right-angle end face of the recess 21.

[0030] During welding, since aluminum and copper will inevitably have a certain degree of stickiness when heated, traditionally, the parts are directly attached to the graphite carrier 1. Due to the large contact area, adhesion is inevitable. Therefore, the end face of the recess 21 in this embodiment that contacts the part to be welded is wavy, and its wave crest conflicts with the end face of the part to be welded, so that the contact area between the recess 21 and the part to be welded is smaller, reducing the degree of adhesion.

[0031] like Figure 2 As shown, the inner end surface of the recess 21 is processed into a wave shape, the height difference of the wave crest is 0.5 mm, and a ventilation hole 211 is opened at the wave trough.

[0032] It should be noted that, in order to further improve the heat dissipation effect, through holes 22 are respectively embedded inside the fixture 2 at each notch 21. The ventilation holes 211 communicate with the through holes 22. During use, since the troughs do not directly contact the workpiece to be welded, an air flow channel is formed between the workpiece to be welded and the fixture 2 through these ventilation holes 211, enhancing natural convection heat dissipation. That is, the heat generated at the workpiece to be welded will enter the interior of the fixture 2 through the air flow channel, while reducing the heat accumulation of the material.

[0033] A ventilation groove 11 is formed at the bottom of the carrier 1. There are several ventilation grooves 11, which are arranged at intervals along one side direction of the workpiece to be welded. The air outlet of the ventilation groove 11 penetrates through the carrier 1. The air flow inside the fixture 2 will be discharged to the outside through the ventilation groove 11. During the process of the air flow passing through, the heat at the upper end surface of the carrier 1 will also be dissipated by flowing. The end of the through hole 22 is connected to the ventilation groove 11 through a filter screen 12. Specifically, during welding, air (cold air flow) is input into the through hole 22 from top to bottom by a wind generating device such as a fan or a blower. The air will pass through the back of the wave crest in contact with the workpiece to be welded, and the heat generated due to contact at the wave crest will be dissipated through the air flow, making the temperature of the contact surface between the wave crest and the workpiece to be welded lower than that of other processing parts, further reducing the possibility of adhesion.

[0034] It is worth mentioning that, referring to the appendix Figure 9-10 , since the troughs are for the hot air flow between the welded part and the fixture 2 to enter the interior of the fixture 2. In this embodiment, in order to prevent the top air flow from interfering with the hot air flow entering the troughs through the ventilation holes 211 when entering the interior of the fixture 2, a windproof housing 221 is welded at a position close to the notch 21 inside the through hole 22 in this embodiment. A partition 222 is provided at the top of the windproof housing 221. The partition 222 can block the air flow input from top to bottom. This part of the air flow will enter the interior of the through hole 22 in two directions. First, it will flow between the windproof housing 221 and the inner wall of the through hole 22. Since the bottom of the through hole 22 is connected to the ventilation groove 11 inside the carrier 1, that is, the air will flow from top to bottom until it flows out from the ventilation groove 11, ensuring that the temperature of the wave crest contact part will not be very high and avoiding the adhesion phenomenon caused by height. It should be noted that the bottom of the windproof housing 221 is in communication with the air flow inside the through hole 22 and is spaced from the filter screen 12.

[0035] That is, the bottom of the windproof housing 221 is still at a certain distance from the filter screen 12. The hot air entering the interior of the windproof housing 221 through the troughs will accumulate inside the windproof housing 221. When the air flow passes between the windproof housing 221 and the inner wall of the through hole 22, a negative pressure will be generated when passing through the bottom of the windproof housing 221, and the air flow inside the windproof housing 221 will be synchronously discharged.

[0036] One end face of the windproof housing 221 away from the workpiece to be welded is inclined away from the workpiece to be welded, and the inclined surface forms an angle of 30° with the horizontal direction.

[0037] A partition plate 222 is fixed at the top of the windproof housing 221, and its interior is hollow to form an inner cavity 223. A ventilation port 224 is opened below the partition plate 222, and the valve plate 225 is hinged to the edge of the partition plate 222 through a torsion spring. Under normal conditions, the valve plate 225 closes the ventilation port 224 under the action of the torsion spring; when the temperature in the air passage 22 rises due to the high temperature of welding, the heat dissipation effect can be improved by increasing the air flow rate. And because the wall thickness of the inner cavity 223 is relatively thin, when the air flows, while increasing the flow rate, it will also play a good role in dissipating heat from the windproof housing 221, and can timely discharge the heat inside it. Under normal circumstances, the main function of the air flow is to ensure that the temperature at the back side of the wave crest is relatively low, and only when the heat at the trough part is too high, the rotation of the valve plate 225 is triggered by increasing the air flow rate.

[0038] When the increased air flow is sufficient to overcome the hinge elastic force of the valve plate 225, as shown in the appendix Figure 10 The air flow will push the valve plate 225 to rotate and open the ventilation port 224, allowing a part of the air flow to flow out through the inner cavity 223 to the bottom of the windproof housing 221.

[0039] The methods of generating air flow, collecting internal temperature, and welding are well-known technologies and will not be elaborated here.

[0040] It should be noted that there is a gap between adjacent windproof housings 221, and the part in contact with the workpiece to be welded, that is, the back side of the wave crest, is located between adjacent windproof housings 221, and a part of the air flow entering from the top will flow through the gap.

[0041] During use, the aluminum part is placed in the notch 21 of the corresponding size. The bottom surface of the aluminum part is attached to the carrier 1, and the side wall tightly abuts against the wavy surface (at the wave crest) of the notch 21.

[0042] During high-frequency welding, the graphite carrier 1 quickly conducts heat, and at the same time, the hot air generated in the welding area enters the air passage 22 through the ventilation holes 211. When the local temperature exceeds the set threshold, the valve plate 225 is opened under the action of air pressure to accelerate the air flow circulation and avoid heat accumulation.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-frequency welding lap positioning device for aluminum parts, characterized in that Including: A stage (1), the stage (1) is made of graphite material; A jig (2), the jig (2) is fixed at the upper end of the stage (1), and it has several rectangular notches (21) for placing the parts to be welded; Wherein, when the parts to be welded are placed on the notches (21), the bottom and the side end faces of the parts to be welded are respectively in contact with the upper end of the stage (1) and the right-angle end faces of the notches (21), and the end faces of the notches (21) in contact with the parts to be welded are wavy, and the wave crests thereof are in contact with the end faces of the parts to be welded.

2. The high-frequency welding lapping positioning device for aluminum parts according to claim 1, wherein, The jig (2) is rectangular, and each of its four corner ends is provided with a notch (21).

3. The high-frequency welding lap positioning device for aluminum parts according to claim 2, wherein The areas of the four notches (21) are not equal.

4. A high-frequency welding lap positioning device for aluminum parts according to claim 1, characterized in that, The jig (2) is made of steel, and a nitride layer is formed on the end face of the jig (2) after gas nitriding treatment.

5. The high-frequency welding lap positioning device for aluminum parts according to claim 1, wherein, An air duct (22) communicating with the external air is arranged in the jig (2), and ventilation holes (211) communicating with the air duct (22) are arranged at the wave troughs of the notches (21).

6. The high-frequency welding lap positioning device for aluminum parts according to claim 5, wherein, A ventilation groove (11) communicating with the end of the air duct (22) is arranged in the stage (1), and the ventilation groove (11) and the air duct (22) are separated by a filter screen (12).

7. The high-frequency welding lap positioning device for aluminum parts according to claim 6, wherein, An air-proof shell (221) for preventing air in the air duct (22) from entering is arranged in the air duct (22) at the rear side of the wave trough of the notch (21). A partition plate (222) is arranged at the top of the air-proof shell (221), and the bottom of the air-proof shell (221) is in communication with the internal air flow of the air duct (22) and is spaced from the filter screen (12).

8. A high-frequency welding lap positioning device for aluminum parts according to claim 7, characterized in that, The end face of the air-proof shell (l21) away from the parts to be welded is inclined in the direction away from the parts to be welded.

9. The high-frequency welding lap positioning device for aluminum parts according to claim 8, characterized in that, An inner cavity (223) with its bottom communicating with the internal air flow of the air duct (22) is arranged in the air-proof shell (221) below the partition plate (222).

10. The aluminum part high-frequency welding lapping positioning device according to claim 9, characterized in that, An air vent (224) communicating with the inside of the inner cavity (223) is opened in the upper part of the inner cavity (223) below the partition plate (222). A valve plate (225) that can rotate in the direction of the air vent (224) is elastically hinged on the partition plate (222). When the valve plate (225) rotates, the air vent (224) communicates with the gas inside the air duct (22).

Images