Clamping and positioning mechanism for metal hose welding

Abstract

The utility model discloses a clamping and positioning mechanism for metal hose welding. The clamping and positioning mechanism comprises a horizontal and rotatable supporting piece and a metal sleeve, wherein the metal sleeve is coaxially and slidably arranged on the supporting piece in a sleeving mode and can be locked after sliding. A plurality of metal tensioning pieces are fixedly arranged at one end of the metal sleeve at intervals in the circumferential direction of the metal sleeve, the end of the supporting piece is a reducing part, and when the metal sleeve moves from the end of the supporting piece to a shaft body of the supporting piece, all the metal tensioning pieces can be expanded and wrap the supporting piece. According to the clamping and positioning mechanism for welding the metal hose, the defects that in the prior art, during welding, a worker needs to manually rotate the metal hose for girth welding, but in the rotating process, the metal hose is prone to moving relative to the positioning mechanism, so that the welding position deviates, and the welding effect is reduced are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of metal hose welding, in particular to a clamping and positioning mechanism for metal hose welding. Background Art

[0002] Small-diameter metal hoses are actually composed of thin-walled stainless steel metal bellows, PVC coating and joint components. For example, metal hoses for stoves are required to have comprehensive properties such as flexibility, vibration resistance, pressure resistance, corrosion resistance and fatigue resistance. During manufacturing, after the metal bellows is covered with a PVC protective layer, the end of the bellows is fixed with joint accessories by welding.

[0003] After searching: the Chinese patent application number is "CN202020605641.0", which discloses a metal hose joint protection welding device, including a ventilation interface, a closed cavity unit, a joint assembly positioning unit, and a welding gun telescopic positioning unit. The metal bellows unit is placed in the joint assembly positioning unit for welding positioning. The joint assembly positioning unit includes a guide core rod, a locking nut, and a pipe thread positioning slider. The outer circle of the guide core rod matches the through diameter of the metal bellows. The metal hose is positioned by the positioning unit.

[0004] In the process of implementing the present invention, the inventor found that the prior art has the following problems:

[0005] Since the guide core rod of the existing joint positioning unit is adapted to the diameter of the metal hose, and the metal hose is sleeved on the guide core rod, during welding, the worker needs to manually rotate the metal hose for ring welding. However, during the rotation, the metal hose is prone to move with the positioning mechanism, causing the welding position to shift and reducing the welding effect.

[0006] Therefore, it is an urgent problem to be solved by the present invention to provide a clamping and positioning mechanism for metal hose welding which has a simple structure, is easy to maintain, can clamp and fix the metal hose, and prevent the metal hose from moving and reducing the welding effect during rotation. Utility Model Content

[0007] In view of the above technical problems, the purpose of the utility model is to overcome the problem in the prior art that during welding, the worker needs to manually rotate the metal hose for ring welding, but during the rotation process, the metal hose is easily moved with the positioning mechanism, which causes the welding position to shift and reduces the welding effect. Thus, a clamping and positioning mechanism for metal hose welding is provided, which has a simple structure and is convenient for maintenance during use, and can clamp and fix the metal hose, and prevent the metal hose from moving during the rotation process to reduce the welding effect.

[0008] In order to achieve the above-mentioned object, the utility model provides a clamping and positioning mechanism for welding a metal hose, the clamping and positioning mechanism comprising: a horizontal and rotatable support member and a metal sleeve coaxially slidably sleeved on the support member and capable of being locked after sliding;

[0009] One end of the metal sleeve is fixedly provided with a plurality of metal tensioning sheets at intervals along its circumferential direction, and the end of the support member is a reducing portion. When the metal sleeve moves from the end of the support member toward its shaft body, all the metal tensioning sheets can be stretched out and covered on the support member.

[0010] Preferably, the diameter-changing portion comprises: a first column, a second column and a transition portion; wherein,

[0011] The diameter of the first column is smaller than the diameter of the second column, and the first column and the second column are connected together via a truncated cone-shaped transition portion.

[0012] Preferably, the clamping and positioning mechanism further comprises a driving assembly for driving the metal sleeve to slide on the support member, wherein the driving assembly comprises: a guide sleeve, a power rod, a connecting rod and an actuator; wherein,

[0013] The support member with a hollow structure inside can be detachably mounted on one end of the rotatable guide sleeve, and a power rod is coaxially and movably arranged inside the guide sleeve, a connecting rod is detachably and coaxially fixedly arranged on one end of the power rod, the free end of the connecting rod passes through the interior of the support member and is mounted on the metal sleeve, the other end of the power rod passes through the other end of the guide sleeve and is mounted on the actuator, and the actuator can drive the power rod to move in the guide sleeve.

[0014] Preferably, the inner portion of the metal sleeve near all the metal tensioning plates is recessed inward to form an assembly cavity, and a limit slot for the connecting rod to pass through is opened on the top of the metal sleeve, and a limit clamp is fixedly provided on the end of the connecting rod passing through the limit slot, and the diameter of the bottom of the conical limit clamp is larger than the diameter of the limit slot, and the end portion of the support member extends into the assembly cavity, and a return spring is sleeved on the connecting rod located in the assembly cavity, and both ends of the return spring respectively abut against the assembly cavity and the support member.

[0015] Preferably, the actuator is a pneumatic cylinder or a hydraulic cylinder.

[0016] Preferably, the clamping and positioning mechanism further comprises: a mounting seat; wherein,

[0017] The end of the power rod passing through the guide sleeve is rotatably arranged on the mounting seat, and the mounting seat is fixed on the moving end of the actuator.

[0018] Preferably, at least a key is fixedly provided on the shaft of the power rod, and the inner wall portion of the guide sleeve is recessed inwardly to form a keyway matched with the key.

[0019] Preferably, the end of the support member away from the metal sleeve is fixedly connected to the guide sleeve by means of a threaded connection.

[0020] Preferably, the connecting rod is detachably fixed to the power rod by means of a threaded connection; wherein,

[0021] The end portion of the power rod is recessed inward to form a threaded hole, and the outer wall of the end portion of the connecting rod is provided with a thread matched with the threaded hole.

[0022] According to the above technical solution, the clamping and positioning mechanism for metal hose welding provided by the utility model has the following beneficial effects when used:

[0023] (1) The end of the metal hose is put on the metal sleeve, and then the metal sleeve is driven to move from the end of the support member to the shaft body thereof. In the process of the metal sleeve driving the metal hose to move on the shaft body of the support member, all the metal tensioning sheets on the metal sleeve can be stretched open and wrapped on the surface of the support member through the diameter reducing portion of the support member. The purpose of doing so is that when all the metal tensioning sheets are stretched open by the diameter reducing portion of the support member to tension the metal hose on the metal sleeve and firmly fix it on the metal sleeve, so as to avoid movement during the process of the support member driving the metal hose to rotate, thereby improving the welding effect.

[0024] Therefore, the utility model has a simple structure, is easy to disassemble and assemble, is convenient for later maintenance, and has a low maintenance cost.

[0025] (2) Compared with the prior art using silicone or plastic materials, the metal sleeve and the metal tensioning plate are both made of metal, which improves their mechanical strength and wear resistance, thereby extending their service life, avoiding frequent replacement, and saving maintenance costs.

[0026] In summary, the utility model has a simple structure, is easy to maintain, and can clamp and fix the metal hose, preventing the metal hose from moving during rotation to reduce the welding effect.

[0027] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation mode; and the parts not involved in the utility model are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of a clamping and positioning mechanism for welding a metal hose provided in a preferred embodiment of the utility model;

[0030] Figure 2 It is a structural cross-sectional view of a clamping and positioning mechanism for welding a metal hose provided in a preferred embodiment of the utility model;

[0031] Figure 3 It is a schematic diagram of the assembly of a support member and a guide sleeve of a clamping and positioning mechanism for welding a metal hose provided in a preferred embodiment of the utility model;

[0032] Figure 4 yes Figure 2 The structural cross-sectional view from the AA direction;

[0033] Figure 5 It is an assembly diagram of a clamping and positioning mechanism for metal hose welding and a ring welding machine provided in a preferred embodiment of the utility model.

[0034] Figure 6 This is a schematic diagram of the structure of the cooker tube

[0035] Figure 7 It is also a schematic diagram of the structure of the cooker tube;

[0036] Description of Reference Numerals

[0037] 1. Guide sleeve; 2. Support member; 20. Column No. 1; 21. Column No. 2; 22. Transition part; 3. Metal sleeve; 30. Metal tensioning plate; 4. Power rod; 5. Connecting rod; 6. Assembly cavity; 7. Return spring; 8. Limiting slot; 9. Limiting clamp; 10. Mounting seat; 11. Key; 12. Keyway. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0039] like Figure 1-5 As shown, the utility model provides a clamping and positioning mechanism for welding a metal hose, the clamping and positioning mechanism comprising: a horizontal and rotatable support member 2 and a metal sleeve 3 coaxially slidably sleeved on the support member 2 and capable of being locked after sliding;

[0040] One end of the metal sleeve 3 is fixedly provided with a plurality of metal tensioning sheets 30 at intervals along its circumferential direction. The end of the support member 2 is a reducing portion. When the metal sleeve 3 moves from the end of the support member 2 toward its axial body, all the metal tensioning sheets 30 can be stretched out and covered on the support member 2.

[0041] In the above scheme, a plurality of cutouts may be uniformly provided at the end of the metal sleeve 3 along its circumferential direction to form a plurality of metal tensioning sheets 30, so that all the metal tensioning sheets 30 and the metal sleeve 3 are an integral structure, thereby improving the mechanical strength of the entire clamping and positioning mechanism. Of course, a plurality of metal tensioning sheets 30 may also be uniformly fixedly provided at the end of the metal sleeve 3 along its circumferential direction by welding or other fixing methods.

[0042] When in use, the end of the metal hose is sleeved on the metal sleeve 3, and then the metal sleeve 3 is driven to move from the end of the support member 2 to its axial body. In the process of the metal sleeve 3 driving the metal hose to move on the axial body of the support member 2, all the metal tensioning sheets 30 on the metal sleeve 3 can be stretched and wrapped on the surface of the support member 2 through the reducing portion of the support member 2. The purpose of doing this is that when all the metal tensioning sheets 30 are stretched by the reducing portion of the support member 2 to tension and clamp the flexible pipe fitting sleeved on the metal sleeve 3, the flexible pipe fitting can be quickly fixed and clamped on the clamping and positioning mechanism, and the support member 2 is rotated to drive the metal sleeve 3 locked on the support member 2 to rotate together, so as to drive the corrugated hose tensioned and fixed on the metal sleeve 3 to rotate together, so that the joint accessories of the flexible pipe fitting can be welded by the ring welding machine later.

[0043] Welding process: Before welding, the end of the metal hose is inserted into the buckling ring and partially exposed for easy welding. The joint accessories are put on the support 2, and then the metal hose with the buckling ring is passed through the metal sleeve 3 and put on the support 2 until the metal hose to be welded is aligned with the joint assembly, and the metal hose is driven to rotate 360° through the rotatable support 2, so that the metal hose and the joint assembly can be ring-welded by the ring welding machine.

[0044] In addition, compared with the prior art using silicone or plastic materials, the metal sleeve 3 and the metal tensioning plate 30 are both made of metal, which improves their mechanical strength and wear resistance, thereby extending their service life, avoiding frequent replacement, and saving maintenance costs.

[0045] In a preferred embodiment of the present invention, the diameter-changing portion includes: a first column 20, a second column 21 and a transition portion 22; wherein,

[0046] The diameter of the first column 20 is smaller than that of the second column 21 , and the first column 20 and the second column 21 are connected together via a truncated cone-shaped transition portion 22 .

[0047] In the above scheme, since the diameter-changing portion is composed of the first column 20, the second column 21 and the transition portion 22 adapted to each other with different diameters, the first column 20, the second column 21 and the transition portion 22 adapted to each other are an integrally formed structure with the support member 2, so that the diameter of the support member 2 becomes larger, such as Figure 1-3 As shown, when the metal sleeve 3 moves from the diameter-changing portion of the support member 2, all the metal tensioning sheets 30 of the metal sleeve 3 are stretched open to tension the metal hose so as to fix the metal hose on the chuck.

[0048] In a preferred embodiment of the present invention, the clamping and positioning mechanism further comprises a driving assembly for driving the metal sleeve 3 to slide on the support member 2, wherein the driving assembly comprises: a guide sleeve 1, a power rod 4, a connecting rod 5 and an actuator; wherein,

[0049] The support member 2 with a hollow structure inside can be detachably mounted on one end of the rotatable guide sleeve 1, and a power rod 4 is coaxially and movably arranged inside the guide sleeve 1, and a connecting rod 5 is detachably and coaxially fixedly arranged on one end of the power rod 4, and the free end of the connecting rod 5 passes through the interior of the support member 2 and is mounted on the metal sleeve 3, and the other end of the power rod 4 passes through the other end of the guide sleeve 1 and is mounted on the actuator, and the actuator can drive the power rod 4 to move in the guide sleeve 1.

[0050] In the above scheme, the guide sleeve 1 is horizontally and rotatably mounted on a workbench located below the welding head of the ring welding machine, and is driven to rotate by an existing power mechanism to rotate the clamping and positioning mechanism and the metal hose fixed on the clamping and positioning mechanism together, so that the end of the metal hose clamped on the clamping and positioning mechanism can rotate, so that the ring welding machine can perform ring welding on the accessories at the end of the metal hose, and the existing power mechanism may include: a motor, a synchronous belt and a synchronous wheel; wherein,

[0051] like Figure 5 As shown, the motor is fixed horizontally on the workbench, and synchronous wheels are coaxially fixed on the output shaft of the motor and the guide sleeve 1, and the two synchronous wheels are connected with synchronous belts, so as to start the output shaft of the motor to rotate, and through the coordinated use of the synchronous wheels and the synchronous belts, the guide sleeve 1, the support 2, and the metal sleeve 3 can be driven to rotate together.

[0052] When in use, the actuator drives the power rod 4 in the guide sleeve 1 to drive the connecting rod 5 to drive the metal sleeve 3 to slide on the support member 2, so that all the metal tensioning sheets 30 on the metal sleeve 3 are opened or reset after being opened.

[0053] In a preferred embodiment of the utility model, the inner portion of the metal sleeve 3 near all the metal tensioning plates 30 is recessed inward to form an assembly cavity 6, and a limit slot 8 for the connecting rod 5 to pass through is opened on the top of the metal sleeve 3, and a limit clamp 9 is fixedly provided at the end of the connecting rod 5 passing through the limit slot 8, and the diameter of the bottom of the conical limit clamp 9 is larger than the diameter of the limit slot 8, and the end portion of the support member 2 extends into the assembly cavity 6, and a return spring 7 is sleeved on the connecting rod 5 located in the assembly cavity 6, and the two ends of the return spring 7 respectively abut against the assembly cavity 6 and the support member 2.

[0054] In the above scheme, if Figure 2 and Figure 3 As shown, when the power rod 4 drives the metal sleeve 3 to move from the end of the support member 2 to its axial body under the driving force of the actuator, the limit clamp 9 of the connecting rod 5 moves toward the end of the metal sleeve 3 until the limit clamp 9 is clamped in the limit groove 8 of the metal sleeve 3, and the connecting rod 5 is fixedly connected with the metal sleeve 3 under the action of the limit clamp 9 and the limit groove 8. As the power rod 4 continues to move, the metal sleeve 3 is pulled by the connecting rod 5 to slide toward the support member 2. At the same time, the metal sleeve 3 compresses the return spring 7 in the assembly cavity 6 to make it in a compressed state. When the metal sleeve 3 is reset, the compressed return spring 7 is restored from the compressed state to its original natural state, and the connecting rod 5 is pulled to drive the metal sleeve 3 and the power rod 4 to move in the opposite direction to restore the metal sleeve 3 to its initial position.

[0055] In a preferred embodiment of the present invention, the actuator is a pneumatic cylinder or a hydraulic cylinder.

[0056] In the above scheme, the air cylinder or hydraulic cylinder is the existing technology, so its specific structure and use principle will not be repeated here.

[0057] In a preferred embodiment of the present invention, the clamping and positioning mechanism further comprises: a mounting seat 10; wherein,

[0058] The end of the power rod 4 passing through the guide sleeve 1 is rotatably arranged on the mounting seat 10, and the mounting seat 10 is fixed on the moving end of the actuator.

[0059] In the above scheme, if Figure 1 and Figure 2 As shown, the end of the power rod 4 is rotatably mounted on the mounting seat 10 so that the power rod 4 can cooperate with the guide sleeve 1 to drive the metal sleeve 3 and the support member 2 to rotate together.

[0060] During the assembly process, when the actuator is a pneumatic cylinder or a hydraulic cylinder, the free end of its piston rod is fixedly connected to the mounting seat 10 .

[0061] In a preferred embodiment of the present utility model, at least a key 11 is fixedly provided on the shaft of the power rod 4 , and the inner wall portion of the guide sleeve 1 is recessed inward to form a keyway 12 matched with the key 11 .

[0062] In the above scheme, if Figure 4 As shown, through the cooperation of the key 11 and the keyway 12, the power rod 4 can slide horizontally along its axial direction in the guide sleeve 1 under the driving force of the actuator, and the sliding power rod 4, metal sleeve 3 and support 2 can rotate together with the guide sleeve 1, so that the end of the corrugated hose clamped on the clamping and positioning mechanism can rotate, so that the ring welding machine can perform ring welding on the accessories at the end of the corrugated hose.

[0063] In a preferred embodiment of the present invention, the end of the support member 2 away from the metal sleeve 3 is fixedly connected to the guide sleeve 1 by means of a threaded connection.

[0064] In the above scheme, the guide sleeve 1 and the support member 2 are conveniently assembled by means of threads, which is convenient for assembly and maintenance.

[0065] In a preferred embodiment of the present invention, the connecting rod 5 is detachably fixed to the power rod 4 by means of a threaded connection; wherein,

[0066] The end portion of the power rod 4 is recessed inward to form a threaded hole, and the outer wall of the end portion of the connecting rod 5 is provided with a thread matching the threaded hole.

[0067] In the above solution, the connecting rod 5 is conveniently assembled on the power rod 4 by means of threaded connection, so as to facilitate subsequent maintenance and replacement.

[0068] In summary, the clamping and positioning mechanism for metal hose welding provided by the utility model overcomes the problem that during the prior art welding, workers are required to manually rotate the metal hose for ring welding. However, during the rotation process, the metal hose is prone to move with the positioning mechanism, causing the welding position to shift and reducing the welding effect.

[0069] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0070] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0071] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A clamping and positioning mechanism for metal hose welding, characterized in that: The clamping and positioning mechanism comprises: a horizontal and rotatable support member (2) and a metal sleeve (3) coaxially slidably sleeved on the support member (2) and capable of being locked after sliding; One end of the metal sleeve (3) is fixedly provided with a plurality of metal tensioning sheets (30) at intervals along its circumferential direction, and the end of the support member (2) is a reducing portion. When the metal sleeve (3) moves from the end of the support member (2) toward its shaft body, all the metal tensioning sheets (30) can be stretched out and covered on the support member (2).

2. The clamping and positioning mechanism for metal hose welding according to claim 1, characterized in that: The diameter-changing portion comprises: a first column (20), a second column (21) and a transition portion (22); wherein: The diameter of the first column (20) is smaller than the diameter of the second column (21), and the first column (20) and the second column (21) are connected together via a truncated cone-shaped transition portion (22).

3. The clamping and positioning mechanism for metal hose welding according to claim 1, characterized in that: The clamping and positioning mechanism also includes a driving assembly for driving the metal sleeve (3) to slide on the support member (2), the driving assembly including: a guide sleeve (1), a power rod (4), a connecting rod (5) and an actuator; wherein: The support member (2) having an internal hollow structure is detachably mounted on one end of the rotatable guide sleeve (1), and a power rod (4) is coaxially and movably arranged inside the guide sleeve (1), and a connecting rod (5) is detachably and coaxially fixedly arranged on one end of the power rod (4), the free end of the connecting rod (5) passes through the interior of the support member (2) and is mounted on the metal sleeve (3), and the other end of the power rod (4) passes through the other end of the guide sleeve (1) and is mounted on the actuator.

4. The clamping and positioning mechanism for metal hose welding according to claim 3, characterized in that: The inner part of the metal sleeve (3) near all the metal tensioning sheets (30) is recessed inward to form an assembly cavity (6), and a limit slot (8) is provided on the top of the metal sleeve (3) for the connecting rod (5) to pass through, and a limit clamp (9) is fixedly provided at the end of the connecting rod (5) passing through the limit slot (8), and the diameter of the bottom of the conical limit clamp (9) is larger than the diameter of the limit slot (8), and the end part of the support member (2) extends into the assembly cavity (6), and a return spring (7) is sleeved on the connecting rod (5) located in the assembly cavity (6), and the two ends of the return spring (7) respectively abut against the assembly cavity (6) and the support member (2).

5. The clamping and positioning mechanism for metal hose welding according to claim 3, characterized in that: The actuator is a pneumatic cylinder or a hydraulic cylinder.

6. The clamping and positioning mechanism for welding a metal hose according to claim 5, characterized in that: The clamping and positioning mechanism also includes: a mounting seat (10); wherein: The end of the power rod (4) passing through the guide sleeve (1) is rotatably arranged on the mounting seat (10), and the mounting seat (10) is fixed on the moving end of the actuator. The actuator can drive the power rod (4) to move in the guide sleeve (1).

7. The clamping and positioning mechanism for metal hose welding according to claim 6, characterized in that: At least a key (11) is fixedly arranged on the shaft of the power rod (4), and the inner wall portion of the guide sleeve (1) is recessed inwardly to form a keyway (12) adapted to the key (11).

8. The clamping and positioning mechanism for metal hose welding according to claim 3, characterized in that: The end of the support member (2) away from the metal sleeve (3) is fixedly connected to the guide sleeve (1) by means of a threaded connection.

9. The clamping and positioning mechanism for metal hose welding according to claim 3 or 4, characterized in that: The connecting rod (5) is detachably fixed to the power rod (4) by means of a threaded connection; wherein: The end portion of the power rod (4) is recessed inward to form a threaded hole, and the outer wall of the end portion of the connecting rod (5) is provided with a thread matching the threaded hole.

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