Vacuum welding fixing tool

Abstract

The utility model discloses a vacuum welding fixing tool which comprises an unpowered driver, a base, a fixed seat and a sliding seat. A fixed seat is fixed on one side of the base, clamping blocks are respectively fixed on the tops of opposite surfaces of the sliding seat and the fixed seat, a sliding rod is fixed on one side, far away from the fixed seat, of the sliding seat, the other end of the sliding rod is connected with an unpowered driver through a connector, and a main body of the unpowered driver is a limiting cylinder; the end, close to the connector, of the limiting cylinder is in sliding fit with a telescopic rod through a sliding base, the telescopic rod is connected with the connector, the other end of the telescopic rod is connected with a push rod column of a columnar structure, the push rod column is in sliding fit with the inner wall of the limiting cylinder, and the end, away from the sliding base, of the limiting cylinder is sealed through a limiting sealing plug. An elastic air bag is arranged between the limiting sealing plug and the push rod column, and a flat pressing hole communicating the inner space and the outer space is formed in the outer portion of the limiting cylinder. The vacuum brazing clamping device has the beneficial effects that vacuum brazing clamping can be achieved without external power; workpieces can be clamped and fixed without manual screwing and other operations.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vacuum welding technical field, especially relate to a vacuum welding fixing tool. BACKGROUND

[0002] Vacuum welding (vacuum brazing) technology has become a promising welding technology since the 1940s. It first appeared in the electronic industry to braze copper and stainless steel parts, and later was applied to the aviation industry and the atomic energy industry. In 1959, it was applied to the manufacture of stainless steel plate-fin heat exchangers. Now, it is widely used in plate-fin heat exchangers and coolers in air separation equipment, petrochemical equipment, engineering machinery, vehicles, ships and home appliances industries. Due to the incomparable advantages of vacuum brazing technology, it has rapidly developed and been widely applied in industrialized countries around the world.

[0003] The existing vacuum brazing fixing tool, such as the vacuum brazing fixture for sealing ring parts disclosed in CN109352120A, still needs to be manually tightened for clamping and fixing, which is time-consuming and labor-intensive. Therefore, there is a need for a vacuum welding manual-free fixing tool for vacuum brazing environment. SUMMARY

[0004] The utility model aims to provide a vacuum welding fixing tool to solve the technical problems mentioned in the background.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme:

[0006] A vacuum welding fixing tool, comprising: a non-powered drive, a base, a fixed seat, and a sliding seat; the base is fixed on one side with a fixed seat of a block structure, the top surface of the base is provided with a sliding rail, a sliding block is slidingly fitted on the sliding rail, the sliding block is fixed on one side with a sliding seat of a block structure, the opposite faces of the sliding seat and the fixed seat are each fixed on the top with a clamping block, the side of the sliding seat away from the fixed seat is fixed with a horizontal sliding rod, the other end of the sliding rod is connected with the non-powered drive through a connector, the main body of the non-powered drive is a limiting cylinder of a cylindrical structure, one end of the limiting cylinder close to the connector is slidingly fitted with an extension rod through a sliding seat, the extension rod is connected with the connector, the other end of the extension rod is connected with a push rod column of a column structure, the push rod column is slidingly fitted with the inner wall of the limiting cylinder, the end of the limiting cylinder away from the sliding seat is sealed with a limiting plug, an elastic air bag is arranged between the limiting plug and the push rod column, the proximal end of the elastic air bag is connected with the push rod column, and the limiting cylinder is externally provided with a flat hole communicating the inner and outer spaces thereof.

[0007] Further, in order to make the sliding fit between the push rod column and the limiting cylinder more smooth, a plurality of annular embedding grooves are arranged on the push rod column, a circumferential array of rolling balls are arranged in each embedding groove, and the inner wall of the limiting cylinder is provided with sliding ball grooves parallel to the axis line thereof, and the rolling balls of the embedding grooves are embedded in the sliding ball grooves adjacent thereto.

[0008] Further, in order to avoid temporary fixation of the workpiece to be welded when not clamped, a horizontal plate structure forming a placement table is arranged on one side of the fixed seat close to the sliding seat, the placement table is located below the clamping block, and a plug hole for inserting the workpiece to be welded is arranged on the placement table.

[0009] Further, in order to avoid the horizontal placement table from limiting the translation clamping of the sliding seat, a concave bend or groove forming a concave position is arranged on the sliding seat for avoiding the placement table.

[0010] Further, in order to facilitate the fixation of the workpiece, a concave clamping groove matching the outer contour of the workpiece to be welded is arranged on the opposite surfaces of the two groups of clamping blocks on the fixed seat and the sliding seat.

[0011] Further, in order to make the plug hole adapt to workpieces to be welded with different shapes, the plug hole is arranged on a block-shaped insertion block, and the insertion block is detachably fixed on the placement table by a first fixing bolt.

[0012] Further, in order to make the clamping block adapt to workpieces to be welded with different shapes, the clamping block is designed to be replaceable, and the clamping block is detachably fixed on the fixed seat or the sliding seat by a second fixing bolt.

[0013] Further, in order to facilitate the fixation of the workpiece, a concave clamping groove matching the outer contour of the workpiece to be welded is arranged on the opposite surfaces of the two groups of clamping blocks on the fixed seat and the sliding seat.

[0014] Further, in order to prevent high temperature from affecting the stability of the elastic air bag, the elastic air bag is made of a high-temperature-resistant elastic material.

[0015] In summary, the utility model has the following beneficial effects:

[0016] ① Without external power, vacuum brazing clamping can be realized: through the establishment of the unpowered driver, when vacuumizing, the flat pressure hole is used to transfer the vacuum environment to the outer surface of the elastic air bag, the elastic air bag expands because the external air pressure becomes smaller, and because the limiting cylinder is limited, the elastic air bag cannot realize radial and circumferential expansion under the limiting action, but can only realize axial expansion, and one end of the axial direction is limited by the limiting plug, so the elastic air bag can only expand towards the push rod column side, thereby driving the push rod column to move away from the limiting plug, and then the telescopic rod connected with the push rod column follows the movement, and then the telescopic rod drives the sliding block and the sliding seat as a whole to slide on the slide rail through the connector and the slide rod, and then the clamping blocks on the sliding seat move towards the clamping blocks on the fixed seat, and then the inner recessed grooves on the two sets of clamping blocks clamp and fix the workpiece to be welded.

[0017] ② Without manual screwing operation, workpiece clamping and fixing can be realized: through the establishment of the unpowered driver, after brazing, the vacuum of the vacuum brazing container is released, the air pressure outside the elastic air bag rises, and the elastic air bag starts to reset and retract, and for the same reason as above, the retracted elastic air bag drives the clamping blocks on the sliding seat to move away from the clamping blocks on the fixed seat, thereby releasing the clamped workpiece to be welded, and the brazed workpiece to be welded can be taken out, and the clamping and unloading of the workpiece do not require manual screwing operation, saving time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic view of the utility model;

[0019] Figure 2 is the replaceable structure schematic view of the clamping block and the plug-in block in the utility model;

[0020] Figure 3 is the top view structure schematic view of the utility model;

[0021] Figure 4 is the internal structure schematic view of the unpowered driver in the utility model;

[0022] Figure 5 is the cross-sectional structure schematic view of the unpowered driver in the utility model;

[0023] Figure 6 is Figure 1 is the enlarged schematic view of structure A in the utility model.

[0024] In the figure, 1, unpowered driver; 2, base; 3, fixed seat; 4, sliding seat; 5, clamping block; 6, clamping fixed frame; 7, sliding rod; 8, connector; 9, drive fixed frame; 10, workpiece to be welded; 11, limiting cylinder; 12, sliding seat; 13, telescopic rod; 14, push rod column; 15, elastic air bag; 16, flat pressing hole; 17, limiting plug; 111, sliding ball groove; 141, embedded groove; 142, ball; 21, sliding rail; 31, placement table; 32, plug-in block; 33, plug hole; 34, first fixed bolt; 41, inner recess; 42, sliding block; 51, inner recess slot; 52, second fixed bolt. DETAILED DESCRIPTION

[0025] The utility model will be made further detailed explanation in combination with the drawings.

[0026] Embodiment:

[0027] Please refer to Figures 1-6 The utility model provides technical scheme:

[0028] A vacuum welding fixed tool, include: unpowered driver 1, base 2, fixed seat 3, sliding seat 4, fixed seat 3 of one side fixed block structure of base 2, the top surface of base 2 is equipped with sliding rail 21, sliding rail 21 is slidably fitted with sliding block 42, and the sliding block 42 is fixed with the sliding seat 4 of the block structure on the sliding seat 4 and the opposite face top of fixed seat 3 is fixed with a clamping block 5 respectively, and the sliding seat 4 is fixed with a horizontal sliding rod 7 on the side away from fixed seat 3, and the other end of sliding rod 7 is connected with unpowered driver 1 using connector 8, the main part of unpowered driver 1 is the limiting cylinder 11 of a cylindrical structure, and the one end of limiting cylinder 11 near connector 8 is slidably fitted with telescopic rod 13 through sliding seat 12, and telescopic rod 13 is connected with connector 8, and the other end of telescopic rod 13 is connected with the push rod column 14 of a column structure, and push rod column 14 and limiting cylinder 11 inner wall slidably fit, and the one end of limiting cylinder 11 away from sliding seat 12 is sealed using limiting plug 17, and limiting plug 17 and push rod column 14 are provided with an elastic air bag 15, and the similar end of elastic air bag 15 and push rod column 14 are connected, and the outside of limiting cylinder 11 is provided with flat pressing hole 16 leading to the space inside and outside it.

[0029] The push rod column 14 is provided with a plurality of annular embedded grooves 141, and a circumferential array of balls 142 is arranged in each embedded groove 141, the inner wall of limiting cylinder 11 is provided with sliding ball groove 111 parallel to the axis line thereof, and the balls 142 of embedded groove 141 are rollingly embedded in the similar sliding ball groove 111.

[0030] The fixed seat 3 is provided with a horizontally extended plate-shaped structure forming placement table 31 on the side near sliding seat 4, and the placement table 31 is located below clamping block 5, and the placement table 31 is provided with plug hole 33 for inserting the workpiece to be welded.

[0031] The sliding seat 4 is provided with an inner recess or groove to form an inner recess position 41 for avoiding the placement platform 31.

[0032] The opposite surfaces of the two sets of clamping blocks 5 on the fixed seat 3 and the sliding seat 4 are provided with inner recess clamping grooves 51 matching the outer contour of the workpieces 10 to be welded (as shown in the view, the workpieces 10 to be welded are two cylindrical metal rods, and the inner recess clamping grooves 51 can be designed as V-shaped or circular arc-shaped). Figure 6

[0033] The insertion hole 33 is arranged on an insertion block 32 in a plate structure, and the insertion block 32 is detachably fixed on the placement platform 31 by a first fixing bolt 34.

[0034] The clamping block 5 is designed to be replaceable, and the clamping block 5 is detachably fixed on the fixed seat 3 or the sliding seat 4 by a second fixing bolt 52.

[0035] At least two sets of clamping fixing frames 6 are arranged on the side of the base 2, and the clamping fixing frames 6 are provided with vertical fixing hole positions. A driving fixing frame 9 is fixed on the limiting cylinder 11, and the driving fixing frame 9 is provided with vertical fixing hole positions. The bottom of the driving fixing frame 9 is a horizontal surface and is flush with the bottom surface of the clamping fixing frame 6.

[0036] The elastic air bag 15 is made of high-temperature-resistant elastic material, such as borosilicate rubber.

[0037] Brief description of the use process:

[0038] During use, the clamping fixing frame 6 and the driving fixing frame 9 are first fixed in the vacuum brazing container by bolts, and then the workpieces 10 to be welded are connected by brazing agent and inserted into the insertion hole 33 of the fixed seat 3, and are embedded in the inner recess clamping grooves 51 of the clamping blocks 5 on the fixed seat 3.

[0039] Then the hatch of the vacuum brazing container is closed, and the vacuum brazing container is started to be evacuated. During the evacuation, the flat pressing hole 16 is used to transfer the vacuum environment to the outer surface of the elastic air bag 15. Because the external air pressure becomes smaller, the elastic air bag 15 expands. Because of the limiting of the limiting cylinder 11, the elastic air bag 15 cannot expand radially and circumferentially, but can only expand axially. One end of the elastic air bag 15 in the axial direction is limited by the limiting plug 17, so the elastic air bag 15 can only expand towards the push rod column 14 side, thereby pushing the push rod column 14 to move away from the limiting plug 17. The extension rod 13 connected to the push rod column 14 follows the movement, and then the extension rod 13 drives the sliding block 42, the sliding seat 4, the connector 8, and the sliding rod 7 to move as a whole on the sliding rail 21, and then the clamping blocks 5 on the sliding seat 4 move towards the clamping blocks 5 on the fixed seat 3, and then the inner recess clamping grooves 51 on the two sets of clamping blocks 5 clamp and fix the workpieces 10 to be welded. ​

[0040] Then the welding mechanism on the vacuum brazing container can be opened, and the workpiece 10 starts to be brazed, and after brazing, the vacuum of the vacuum brazing container is released, the air pressure outside the elastic air bag 15 rises, and the elastic air bag 15 starts to reset and retract, and as described above, the retracted elastic air bag 15 drives the clamping block 5 on the sliding seat 4 to move away from the clamping block 5 on the fixed seat 3, thereby releasing the clamped workpiece 10 to be welded, and the brazed workpiece 10 can be taken out for the next brazing operation.

[0041] When the push rod column 14 moves in the limiting cylinder 11, the ball 142 rolls in the sliding ball groove 111 (the sliding ball groove 111 is arranged between the gaps between the flat pressing holes 16, and the ball 142 cannot fall out of the flat pressing holes 16) to provide auxiliary rolling sliding and improve the sliding smoothness of the push rod column 14 and the limiting cylinder 11.

[0042] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A vacuum brazing fixture, comprising: The utility model provides a kind of unpowered driver (1), base (2), fixed seat (3), sliding seat (4);Its characterized in that: the base (2) one side is fixed with the fixed seat (3) of a block structure, base (2) top surface is equipped with slide rail (21), slide rail (21) is slidably fitted with sliding block (42), sliding block (42) is fixed with the sliding seat (4) of a block structure on, sliding seat (4) and the opposite surface top of fixed seat (3) are respectively fixed with a clamping block (5), sliding seat (4) is fixed with a horizontal slide bar (7) on the side away from fixed seat (3), the other end of slide bar (7) is connected with unpowered driver (1) using connector (8), the main part of unpowered driver (1) is a cylindrical structure's limit cylinder (11), limit cylinder (11) is close to the end of connector (8) and is slidably fitted with telescopic rod (13) by slide seat (12), telescopic rod (13) and connector (8) are connected, the other end of telescopic rod (13) is connected with a push rod column (14) of a column structure, push rod column (14) and limit cylinder (11) inner wall slidably fit, limit cylinder (11) is sealed using limit plug (17) on the end away from slide seat (12), a flexible air bag (15) is arranged between limit plug (17) and push rod column (14), the proximal end of flexible air bag (15) is connected with push rod column (14), the outside of limit cylinder (11) is equipped with flat pressure hole (16) leading through its inside and outside space.

2. The vacuum brazing fixture of claim 1, wherein: The push rod column (14) is provided with a plurality of annular grooves (141), and each group of grooves (141) is provided with a circumferential array of balls (142), and the inner wall of the limit cylinder (11) is provided with a sliding ball groove (111) parallel to the axis line.

3. The vacuum brazing fixture of claim 1, wherein: The fixed seat (3) is provided with a horizontally extended plate structure on the side close to the sliding seat (4) to form a placement table (31), and the placement table (31) is located below the clamping block (5).

4. The vacuum brazing fixture of claim 3, wherein: The sliding seat (4) is provided with an inner recess (41) formed by an inner recess curve or groove to avoid the placement table (31).

5. The vacuum brazing fixture of claim 1, wherein: The opposite surfaces of the two groups of clamping blocks (5) on the fixed seat (3) and the sliding seat (4) are provided with inner recess grooves (51) matching the outer contour of the workpiece (10) to be welded.

6. The vacuum brazing fixture of claim 3, wherein: The insertion hole (33) is arranged on the insertion block (32) of a block structure, and the insertion block (32) is detachably fixed on the placement table (31) by the first fixing bolt (34).

7. The vacuum brazing fixture of claim 1, wherein: The clamping block (5) is designed to be replaceable, and the clamping block (5) is detachably fixed on the fixed seat (3) or the sliding seat (4) by the second fixing bolt (52).

8. The vacuum brazing fixture of claim 1, wherein: The base (2) is provided with at least two groups of clamping fixing frames (6) on the side, and the clamping fixing frame (6) is provided with a vertical fixing hole, and the limit cylinder (11) is fixed with a driving fixing frame (9), and the driving fixing frame (9) is provided with a vertical fixing hole; the bottom of the driving fixing frame (9) is a horizontal surface and is flush with the bottom surface of the clamping fixing frame (6).

9. The vacuum brazing fixture of claim 1, wherein: The elastic air bag (15) is made of high-temperature-resistant elastic material.

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