Clamping tool for induction brazing of guide pipe and connector

Abstract

The invention discloses a clamping tool for induction brazing of a guide pipe and a connector, which is characterized in that a guide pipe limiting piece and a connector limiting piece are mounted on a base, the guide pipe can be detachably fixed on the guide pipe limiting piece, and the connector is detachably fixed on the connector limiting piece; an induction coil of the induction brazing equipment is located between the guide pipe limiting piece and the connector limiting piece. The atmosphere box provided with a gas inlet is installed on the base, the gas inlet is communicated with a gas path of a protective gas source for external welding, and the induction coil can be located in the atmosphere box. The guide pipe limiting piece and the connector limiting piece are designed on the base, the assembled guide pipe and the assembled connector to be welded can be reliably and temporarily fixed to the base, the guide pipe limiting piece and the connector limiting piece can limit the guide pipe and the connector respectively, and the coaxiality of the guide pipe and the connector in the welding period is guaranteed; and by designing the atmosphere box, it is guaranteed that the guide pipe and the connector cannot be oxidized when heated and the brazing filler metal is melted, and the welding quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of welding auxiliary equipment, and more particularly to a clamping tooling for induction brazing of a conduit and a joint. Background Art

[0002] Induction brazing belongs to a type of brazing. An induction coil on an induction brazing device performs induction heating on a workpiece to be welded. Utilizing the characteristic that the melting point of the filler metal is lower than that of the base metal, the liquid filler metal is filled into the gap to be welded to connect the metals.

[0003] When a conduit and a joint are subjected to induction brazing, a clamping tooling is required to ensure the coaxiality of the two before welding; when the conduit and the joint are clamped, if the clamping is unstable, the conduit and the joint are prone to deformation and misalignment after welding, and the coaxiality of the conduit and the joint does not meet the processing requirements; in addition, there is no protective gas during the induction brazing of existing conduits and joints, and the base metal and the filler metal are easily oxidized during welding, affecting the welding quality.

[0004] Therefore, how to provide a clamping tooling for induction brazing of a conduit and a joint, which can overcome the above problems, is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a clamping tooling for induction brazing of a conduit and a joint.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A clamping tooling for induction brazing of a conduit and a joint, which clamps an assembled and to-be-welded conduit and joint. The assembled conduit and the joint are coaxially arranged, and it includes: a base, a conduit limiting member, a joint limiting member, and an atmosphere box. The conduit limiting member and the joint limiting member are installed on the base. The conduit can be detachably fixed on the conduit limiting member, and the joint coaxially assembled with the conduit is detachably fixed on the joint limiting member. The induction coil of the induction brazing device is located between the conduit limiting member and the joint limiting member. One end of the conduit close to the joint and one end of the joint close to the conduit can both be limited inside the induction coil; the atmosphere box is installed on the base, the atmosphere box has an air inlet, the air inlet is connected to an external protective gas source for welding through a gas path, and the induction coil can be located inside the atmosphere box.

[0008] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a clamping tooling for induction brazing of a catheter and a joint. By designing a catheter limiting member and a joint limiting member on the base, the assembled catheter and joint to be welded can be reliably temporarily fixed on the base. The catheter limiting member and the joint limiting member can respectively limit the catheter and the joint, ensuring the coaxiality of the two during welding, so that the catheter and the joint can meet the welding requirements. By designing an atmosphere chamber, the atmosphere chamber can be buckled outside the induction coil of the induction brazing equipment. When the catheter and the joint are being welded, the atmosphere chamber can be filled with a protective gas to ensure that neither the catheter and the joint nor the brazing filler metal will oxidize when heated or melted, thus ensuring the welding quality.

[0009] Preferably, the axis line of the induction coil of the induction brazing equipment is arranged vertically. The base includes a bottom plate, a vertical plate, and a reinforcing rib plate. The bottom plate is horizontally arranged and the vertical plate is vertically fixed at one end thereof. The reinforcing rib plate is fixed to both the bottom plate and the vertical plate. The catheter limiting member and the joint limiting member are provided on the vertical plate, and the atmosphere chamber is connected to the vertical plate. The base can be reliably arranged, and the catheter limiting member and the joint limiting member can be reliably installed on the vertical plate.

[0010] Preferably, the catheter limiting member includes a first support, a first screw, a first pressing plate, and a first wing nut. Two first supports are arranged in sequence along the plate length direction of the vertical plate. Both first supports are fixed to the side plate of the vertical plate facing away from the reinforcing rib plate. A first screw is fixed to each first support. One end of the first pressing plate is hinged to the first support, and the axis line of the hinge between the two is perpendicular to the axis line of the first screw. A first notch is provided at the other end of the first pressing plate. The end of the first screw away from the first support passes through the first notch and is screwed with the first wing nut. The first pressing plate and the first support jointly clamp the outer wall of the catheter. The catheter limiting member can reliably limit the catheter.

[0011] Preferably, the joint limiting member includes a second support, a second screw, a second pressing plate and a second wing nut. Two second supports are arranged in sequence along the length direction of the vertical plate, and one of the second supports at the uppermost end is arranged below one of the first supports at the lowermost end; both of the two second supports are fixed to the side plate of the vertical plate facing away from the reinforcing rib plate. Each second support is fixed with a second screw. One end of the second pressing plate is hinged to the second support, and the axis line of the hinge between the two is perpendicular to the axis line of the second screw. The other end of the second pressing plate is provided with a second notch. The end of the second screw away from the second support passes through the second notch and is screwed with the second wing nut. The second pressing plate and the second support jointly clamp the outer wall of the joint; an induction coil of the induction brazing equipment is arranged between one of the second supports at the uppermost end and one of the first supports at the lowermost end. The joint limiting member can reliably limit the joint.

[0012] Preferably, the shortest distance between the two first supports is greater than the shortest distance between the two second supports. The length of the conduit is greater than the length of the joint. The two first supports can reliably clamp and limit the conduit to prevent the conduit from shaking.

[0013] Preferably, it further includes a magnet. The atmosphere box includes two semi-bodies arranged oppositely and capable of being buckled together. Both semi-bodies are hinged to the vertical plate, and the axis lines of the hinges are all arranged vertically. After the two semi-bodies are buckled together, the whole forms a rectangular box body. Each semi-body is fixed with a magnet on its outer wall, and the two magnets can be magnetically attracted together. The induction coil can be reliably arranged in the atmosphere box, and the structure of the atmosphere box is simple and reliable. Description of the Drawings

[0014] 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 use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0015] Figure 1 is a schematic diagram of a clamping tool for induction brazing of a conduit and a joint;

[0016] Figure 2 is Figure 1 a partial enlarged view of part A in

[0017] Figure 3 is a front view of the first support in a clamping tool for induction brazing of a conduit and a joint;

[0018] Figure 4It is the front view of the second support in the clamping tooling for induction brazing of the catheter and the joint;

[0019] Figure 5 It is the schematic diagram of the first pressing plate in the clamping tooling for induction brazing of the catheter and the joint Figure 1 ;

[0020] Figure 6 It is the schematic diagram of the first pressing plate in the clamping tooling for induction brazing of the catheter and the joint Figure 2 ;

[0021] Figure 7 It is the schematic diagram of the second pressing plate in the clamping tooling for induction brazing of the catheter and the joint Figure 1 ;

[0022] Figure 8 It is the schematic diagram of the second pressing plate in the clamping tooling for induction brazing of the catheter and the joint Figure 2 ;

[0023] Figure 9 It is the schematic diagram of the semi - body with magnets in the clamping tooling for induction brazing of the catheter and the joint.

[0024] In the figure:

[0025] 1 is the catheter, 2 is the joint, 3 is the bottom plate, 4 is the vertical plate, 5 is the stiffening rib plate, 6 is the first support, 7 is the first screw, 8 is the first pressing plate, 80 is the first notch, 9 is the first wing nut, 10 is the second support, 11 is the second screw, 12 is the second pressing plate, 120 is the second notch, 13 is the second wing nut, 14 is the semi - body, 15 is the magnet. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention discloses a clamping tooling for induction brazing of a catheter and a joint. By designing a catheter limiting member and a joint limiting member on the base in the present invention, the assembled catheter 1 and joint 2 to be welded can be reliably temporarily fixed on the base. The catheter limiting member and the joint limiting member can respectively limit the catheter 1 and the joint 2, ensuring the coaxiality of the two during welding, so that the catheter 1 and the joint 2 can meet the welding requirements;

[0028] By designing an atmosphere chamber, the atmosphere chamber can be buckled outside the induction coil of the induction brazing equipment. When the conduit 1 and the joint 2 are being welded, the atmosphere chamber can be filled with a protective gas to ensure that neither the conduit 1 nor the joint 2 will oxidize when heated and that the filler metal will not oxidize when melted, thus guaranteeing the welding quality.

[0029] By designing a magnet 15, the two semi-bodies 14 can be reliably attracted together, and the induction coil of the induction brazing equipment can be reliably arranged inside the atmosphere chamber.

[0030] The conduit limiting member includes a first support 6, a first screw 7, a first pressing plate 8 and a wing nut 9. The conduit limiting member has a simple structure. The first pressing plate 8 and the first support 6 can jointly press the conduit 1, and the first pressing plate 8 is easy to disassemble and assemble.

[0031] The joint limiting member includes a second support 10, a second screw 11, a second pressing plate 12 and a wing nut 13. The joint limiting member has a simple structure. The second pressing plate 12 and the second support 10 can jointly press the joint 2, and the second pressing plate 12 is easy to disassemble and assemble.

[0032] Embodiment

[0033] See the appendix Figure 1-9 It is a schematic diagram of the overall and partial structures of an embodiment of the present invention. The present invention specifically discloses a clamping tooling for induction brazing of a conduit and a joint, which is arranged on a horizontal workbench surface to clamp the assembled and to-be-welded conduit 1 and joint 2. The joint 2 is tubular. The assembled conduit 1 and joint 2 are coaxially arranged. A filler metal to be melted is provided at the connection position of the conduit 1 and the joint 2. The induction coil of the induction brazing equipment can heat the conduit 1 and the joint 2. After the above-mentioned filler metal is heated and melted, the conduit 1 and the joint 2 are fixed together.

[0034] The tooling includes: a base, a conduit limiting member, a joint limiting member and an atmosphere chamber.

[0035] The base is arranged on the workbench, and a conduit limiting member and a joint limiting member are installed on the base. A conduit 1 can be detachably fixed on the conduit limiting member, and a joint 2 assembled coaxially with the conduit 1 is detachably fixed on the joint limiting member. The conduit limiting member and the joint limiting member can temporarily fix the conduit 1 and the joint 2 respectively, ensuring that the assembled conduit 1 and joint 2 can be reliably arranged coaxially. The induction brazing equipment is installed on the workbench, and the induction coil of the induction brazing equipment is centrally arranged between the conduit limiting member and the joint limiting member. One end of the conduit 1 close to the joint 2 and one end of the joint 2 close to the conduit 1 can be limited inside the induction coil. After the induction coil is powered on, it can heat one end of the conduit 1 close to the joint 2 and one end of the joint 2 close to the conduit 1, and the solder can be smoothly melted. The atmosphere chamber is installed on the base. The atmosphere chamber has an air inlet, and the air inlet is connected to the gas path of an external protective gas source for welding. The induction coil can be located inside the atmosphere chamber. Before the induction coil is powered on, the external protective gas source for welding starts to pump protective gas into the atmosphere chamber. This protective gas is argon, so that the heating of the conduit 1 and the joint 2 and the melting of the solder are carried out in an oxygen-free environment, avoiding oxidation of the conduit 1, the joint 2 and the solder during the brazing process.

[0036] The axis line of the induction coil of the induction brazing equipment is vertically arranged. The base includes a bottom plate 3, a vertical plate 4 and a reinforcing rib plate 5. The bottom plate 3 is horizontally arranged and a vertical iron vertical plate 4 is fixed at one end of it. The vertical plate 4 is a vertically arranged rectangular plate. The reinforcing rib plate 5 is fixed to both the bottom plate 3 and the vertical plate 4 at the same time. The vertical plate 4 and the bottom plate 3 can be reliably fixed, and the vertical plate 4 will not shake. The conduit limiting member and the joint limiting member are provided on the vertical plate 4. The atmosphere chamber is connected to the vertical plate 4.

[0037] The conduit limiting member includes a first support 6, a first screw 7, a first pressing plate 8 and a first wing nut 9. Two first supports 6 are arranged in sequence along the plate length direction of the vertical plate 4. Both of the two first supports 6 are fixed to the side plate of the vertical plate 4 facing away from the reinforcing rib plate 5. A first screw 7 is fixed on each first support 6. One end of the first pressing plate 8 is hinged to the first support 6, and the axis line of the hinge between the two is perpendicular to the axis line of the first screw 7. A notch 80 is provided at the other end of the first pressing plate 8. The end of the first screw 7 away from the first support 6 passes through the notch 80 and is screwed with the first wing nut 9. The first wing nut 9 can be abutted against the plate surface of the first pressing plate 8, and the first pressing plate 8 and the first support 6 jointly clamp the outer side wall of the conduit 1.

[0038] The joint limiting member includes a second support 10, a second screw 11, a second pressing plate 12, and a second wing nut 13. There are two second supports 10 arranged in sequence along the plate length direction of the vertical plate 4. One of the second supports 10 at the uppermost end is arranged below one of the first supports 6 at the lowermost end. Both of the two second supports 10 are fixed to the side plate surface of the vertical plate 4 facing away from the reinforcing rib plate 5. A second screw 11 is fixed to each of the second supports 10. One end of the second pressing plate 12 is hinged to the second support 10, and the hinge axis line between the two is perpendicular to the axis line of the second screw 11. A notch 120 is provided at the other end of the second pressing plate 12. The end of the second screw 11 away from the second support 10 passes through the notch 120 and is threadedly connected to the second wing nut 13. The second wing nut 13 can be in tight contact with the plate surface of the second pressing plate 12. The second pressing plate 12 and the second support 10 jointly clamp the outer side wall of the joint 2. An induction coil of the induction brazing equipment is arranged between one of the second supports 10 at the uppermost end and one of the first supports 6 at the lowermost end.

[0039] Turn the first wing nut 9, the first wing nut 9 presses tightly against the first pressing plate 8, and the first pressing plate 8 and the first support 6 jointly clamp the outer side wall of the conduit 1. A first V-shaped groove for limiting the conduit 1 is provided on the first support 6, and the outer wall of the conduit 1 can be in close contact with the groove wall of the first V-shaped groove.

[0040] Turn the second wing nut 13, the second wing nut 13 presses tightly against the second pressing plate 12, and the second pressing plate 12 and the second support 10 jointly clamp the outer side wall of the conduit 1. A second V-shaped groove for limiting the joint 2 is provided on the second support 10, and the outer wall of the joint 2 can be in close contact with the groove wall of the second V-shaped groove.

[0041] An induction coil of the induction brazing equipment is arranged between one of the second supports 10 at the uppermost end and one of the first supports 6 at the lowermost end.

[0042] The length of the conduit 1 is greater than the length of the joint 2. Correspondingly, the shortest distance between the two first supports 6 is greater than the shortest distance between the two second supports 10. The purpose of this design is to ensure that the two first supports 6 can stably limit the conduit 1.

[0043] More specifically, it further includes a magnet 15. The atmosphere box includes two semi-bodies 14 arranged oppositely and capable of being buckled together. Both of the two semi-bodies 14 are hinged to the vertical plate 4, and the hinge axis lines are all arranged vertically. After the two semi-bodies 14 are buckled together, the whole forms a rectangular box body. A magnet 15 is fixed to the outer wall of each semi-body 14, and the two magnets 15 can be magnetically attracted together.

[0044] The upper end of the semi-body 14 is provided with a first relief notch 80 and a second relief notch 120. A conduit 1 can be arranged between the two first relief notches 80. When the two semi-bodies 14 are buckled together, the two second relief notches 120 can jointly form an air inlet. A connecting pipe can be arranged between the two second relief notches 120. The connecting pipe is connected to an external shielding gas source for welding, and shielding gas flows inside the connecting pipe.

[0045] The shielding gas entering between the two buckled semi-bodies 14 from the connecting pipe can flow out from the gap generated when the two semi-bodies 14 are buckled together.

[0046] When this clamping tooling is in use,

[0047] First, unscrew the wing nut one 9 and the wing nut two 13 from the screw rod one 7 and the screw rod two 11 respectively, and rotate the pressing plate one 8 and the pressing plate two 12, so that the first notch 80 is separated from the screw rod one 7, and the second notch 120 is separated from the screw rod two 11.

[0048] Then, insert the assembled conduit 1, joint 2 and filler metal into the induction coil, and make the connection part of the conduit 1 and the joint 2 be centered and arranged inside the induction coil.

[0049] Then, install the pressing plate one 8 and the pressing plate two 12 in place in sequence, and install the wing nut one 9 and the wing nut two 13. After ensuring that the conduit 1 and the joint 2 are coaxially arranged, tighten the wing nut one 9 and the wing nut two 13.

[0050] Finally, buckle the two semi-bodies 14 together so that the two magnets 15 are adsorbed to each other. Start injecting shielding gas into the atmosphere box. After injecting the shielding gas for a certain period of time, start the induction brazing equipment to start induction brazing the conduit 1 and the joint 2.

[0051] After brazing is completed, open the atmosphere box, and disassemble the pressing plate one 8 and the pressing plate two 12 in sequence, so as to remove the brazed conduit 1 and joint 2.

[0052] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping tooling for induction brazing of a catheter and a joint, which clamps the assembled catheter (1) and joint (2) to be welded, and the assembled catheter (1) and the joint (2) are coaxially arranged, characterized in that, Comprising: A base, a conduit limiting member, a joint limiting member, and an atmosphere box. The conduit limiting member and the joint limiting member are mounted on the base. The conduit (1) can be detachably fixed on the conduit limiting member, and the joint (2) coaxially assembled with the conduit (1) is detachably fixed on the joint limiting member. The induction coil of the induction brazing device is located between the conduit limiting member and the joint limiting member. One end of the conduit (1) close to the joint (2) and one end of the joint (2) close to the conduit (1) can both be limited inside the induction coil. The atmosphere box is mounted on the base. The atmosphere box has an air inlet, and the air inlet is connected to the gas path of an external protective gas source for welding. The induction coil can be located inside the atmosphere box.

2. The clamping tooling for induction brazing of a catheter and a connector according to claim 1, characterized in that, The axis line of the induction coil of the induction brazing device is arranged vertically. The base includes a bottom plate (3), a vertical plate (4), and a reinforcing rib plate (5). The bottom plate (3) is horizontally arranged and one end of it is vertically fixed with the vertical plate (4). The reinforcing rib plate (5) is fixed to both the bottom plate (3) and the vertical plate (4). The conduit limiting member and the joint limiting member are provided on the vertical plate (4). The atmosphere box is connected to the vertical plate (4).

3. A clamping tool for induction brazing of a catheter and a connector according to claim 2, characterized in that, The conduit limiting member includes a first support (6), a first screw (7), a first pressing plate (8), and a first wing nut (9). Two first supports (6) are arranged in sequence along the length direction of the vertical plate (4). Both of the two first supports (6) are fixed to the side plate of the vertical plate (4) facing away from the reinforcing rib plate (5). A first screw (7) is fixed to each first support (6). One end of the first pressing plate (8) is hinged to the first support (6), and the axis line of the hinge between them is perpendicular to the axis line of the first screw (7). A first notch (80) is provided at the other end of the first pressing plate (8). The end of the first screw (7) away from the first support (6) passes through the first notch (80) and is screwed with the first wing nut (9). The first pressing plate (8) and the first support (6) jointly clamp the outer side wall of the conduit (1).

4. A clamping tooling for induction brazing of a catheter and a connector according to claim 3, characterized in that, The joint limiting member includes a second support (10), a second screw (11), a second pressing plate (12), and a second wing nut (13). Two second supports (10) are arranged in sequence along the plate length direction of the vertical plate (4), and one of the second supports (10) at the uppermost end is arranged below one of the first supports (6) at the lowermost end; both of the two second supports (10) are fixed to the side plate surface of the vertical plate (4) facing away from the reinforcing rib plate (5). A second screw (11) is fixed to each of the two second supports (10). One end of the second pressing plate (12) is hinged to the second support (10), and the hinge axis line of the two is perpendicular to the axis line of the second screw (11). A second notch (120) is provided at the other end of the second pressing plate (12). The end of the second screw (11) away from the second support (10) passes through the second notch (120) and is screwed to the second wing nut (13). The second pressing plate (12) and the second support (10) jointly clamp the outer wall of the joint (2); an induction coil of the induction brazing device is arranged between one of the second supports (10) at the uppermost end and one of the first supports (6) at the lowermost end.

5. A clamping tooling for induction brazing of a catheter and a connector according to claim 4, characterized in that, The shortest distance between the two first supports (6) is greater than the shortest distance between the two second supports (10).

6. A clamping tooling for induction brazing of a catheter and a connector according to claim 2, wherein, It further includes a magnet (15). The atmosphere box includes two semi-bodies (14) arranged oppositely and capable of being buckled together. Both of the two semi-bodies (14) are hinged to the vertical plate (4), and the hinge axis lines are both vertically arranged. After the two semi-bodies (14) are buckled together, the whole forms a rectangular box body. A magnet (15) is fixed to the outer wall of each of the two semi-bodies (14), and the two magnets (15) can be magnetically attracted to each other.

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