Automobile water tank branch pipe external circle turning tool and turning method

Abstract

The application discloses a kind of outer circle turning tool and turning method of automobile water tank branch pipe, it is related to turning tool equipment technical field;Including: the connecting piece being connected with lathe, the fixed part for being fixed to the inner wall of automobile water tank branch pipe is arranged on the connecting piece, the release part for releasing the fixed part is arranged on the fixed part, so that the fixed part does not rotate with the connecting piece;In the application, by two groups of symmetrical and opposite screw threads, it is ensured that two groups of advancing rings move synchronously to the inside when lathe rotates, the eccentric problem caused by one-side clamping is avoided, in addition, four groups of evenly distributed connecting lug one, connecting lug four and corresponding adjusting rod one, adjusting rod two, make four groups of clamping blocks move synchronously and evenly stressed in radial direction, guarantee the accuracy of centering, at the same time, the rubber abutting block of clamping block and the antiskid rubber layer of clamping block one and clamping block two form flexible clamping from inside and outside, which prevents the branch pipe from slipping, and avoids metal scratches.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of turning tool equipment, in particular to an automobile water tank branch pipe external turning tool and a turning method. BACKGROUND

[0002] The automobile water tank branch pipe is a key component in the automobile cooling system, which is responsible for splitting the cooling liquid and enhancing the heat dissipation efficiency. Generally, it refers to a branch pipeline connecting the main pipeline of the radiator and other cooling components. The branch pipe is usually made of metal or high-temperature-resistant plastic. One end is connected to the main pipeline of the radiator, and the other end branches to other cooling components. The automobile water tank branch pipe external turning tool is a special fixture designed specifically for the external machining of the automobile water tank branch pipe. Its core function is to achieve precise positioning and stable clamping of the branch pipe, ensuring the dimensional accuracy and geometric tolerance during external turning to meet the process requirements, while improving the machining efficiency and operational safety. In the manufacturing process of the automobile water tank branch pipe, the internal hole boring is usually performed first, followed by external turning. The automobile water tank branch pipe is usually a thin-walled pipe, which needs to be tightly fitted with the radiator, engine, and other components through the internal hole. If the external circle is machined first, the subsequent boring needs to be clamped based on the external circle. However, the thin-walled external circle is prone to oval deformation under the action of clamping force, resulting in the coaxiality of the internal hole and the external circle being out of tolerance.

[0003] A thin-walled cylindrical workpiece external turning tool is disclosed in Chinese Patent No. CN217370519U. The turning tool is coaxially connected to a sliding top seat opposite the three-axis chuck of the lathe, and the turning tool includes a rotating seat and a core column. The fixed end of the rotating seat is fixed to the sliding top seat, and the fixed end of the rotating seat is rotatably and positionally connected to the movable end of the supporting connection rotating seat. The movable end of the rotating seat is axially fixed to the core column. The core column is axially connected with a demolding unit that extends radially out of the core column and cooperates with the supporting top of the thin-walled cylindrical workpiece. The external turning tool is radially supported inside the thin-walled cylindrical workpiece, avoiding the problem of thin-walled collapse during cutting, and has a simple structure and high positioning accuracy.

[0004] However, the above-mentioned prior art has the following disadvantages: during use, the turning tool only relies on the three-axis chuck of the lathe to clamp one end of the workpiece on one side, and the core column only provides radial internal support. The automobile water tank branch pipe is a thin-walled pipe, and the single-sided clamping force is prone to eccentric deformation. After external turning, the geometric tolerance is out of tolerance, making it difficult to adapt to the precise fitting requirements of the radiator and the engine. Furthermore, the workpiece is positioned by the core column, and if there is a slight machining error in the internal hole of the automobile water tank branch pipe or a gap exists between the core column and the internal hole, the workpiece is prone to radial deviation on the core column, resulting in inaccurate centering and affecting the coaxiality of the external circle and the internal hole. SUMMARY

[0005] The purpose of the present application is: in order to solve in the use process, the turning tool only relies on lathe three axis chuck to clamp one end of the workpiece on one side, the core column only provides radial inner support, the automobile water tank branch pipe as a thin-walled pipe, unilateral clamping force is easy to make eccentric deformation, the shape and position tolerance of the outer circle turning is out of tolerance, it is difficult to adapt to the precise matching requirement of radiator and engine, furthermore, it only realizes the positioning of the workpiece through the whole inner support of the core column, if there is slight machining error in the inner hole of the automobile water tank branch pipe or there is gap between the core column and the inner hole, the workpiece is easy to be radially deviated on the core column, which leads to inaccurate centering and affects the coaxiality of the outer circle and the inner hole.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: an automobile water tank branch pipe outer circle turning tool, comprising: a connecting piece connected with a lathe, a fixing piece for fixing the inner wall of the automobile water tank branch pipe is arranged on the connecting piece, and a releasing piece for releasing the fixing piece is arranged on the fixing piece, so that the fixing piece does not rotate with the connecting piece;

[0007] The fixing piece comprises a clamping block and a rotating ring rotatably connected with the connecting piece, a pushing thread is arranged on the outer circular surface of the rotating shaft, a pushing ring is threadedly connected outside the pushing thread, an adjusting rod one is arranged between the pushing ring and the clamping block, an adjusting rod two is arranged between the rotating ring and the clamping block, and the adjusting rod one and the adjusting rod two are arranged in cross shape, a hinged column is rotatably connected to the adjusting rod one, the hinged column penetrates through the adjusting rod two, and the adjusting rod one and the adjusting rod two are hinged through the hinged column;

[0008] When the lathe drives the connecting piece to rotate around its axis, and the releasing piece makes the fixing piece not rotate with it, the pushing thread drives the pushing ring to move towards the rotating ring, the connecting lug one is synchronously close, drives the adjusting rod one to rotate around the hinged column, because the adjusting rod one and the adjusting rod two are hinged, and the adjusting rod two is fixed below the clamping block through the connecting lug four, the included angle between the adjusting rod one and the adjusting rod two is reduced, the clamping block is pushed to move radially, the end of the adjusting rod two slides in the sliding groove, and finally abuts against the inner wall of the branch pipe to realize centering and clamping.

[0009] As a further scheme of the present application: the connecting piece comprises a rotating shaft, a threaded hole is arranged on one side end face of the rotating shaft, and a threaded stud adapted to the threaded hole is arranged on the other side end face of the rotating shaft.

[0010] As a further scheme of the present application: the pushing ring is fixedly connected with a connecting lug one outside, the clamping block is fixedly provided with a connecting lug two at the bottom end, the adjusting rod one is rotatably arranged between the connecting lug one and the connecting lug two, a sliding groove is arranged at the bottom end of the clamping block, a connecting lug three is slidably connected in the sliding groove, the rotating ring is fixedly provided with a connecting lug four on the outer circular surface, and the adjusting rod two is rotatably arranged between the connecting lug three and the connecting lug four.

[0011] Two sets of rotating rings, advancing threads and advancing rings are arranged on each set of rotating shafts, and the two sets of rotating rings, advancing threads and advancing rings are symmetrically distributed, and the two sets of advancing threads are opposite in thread direction.

[0012] As a further scheme of the present application: the release member comprises a socket one opened on the outer circular surface of the rotating shaft, the rotating ring outer circular surface is through-opened with a socket two, and the socket one and the socket two are in communication in the initial state.

[0013] As a further scheme of the present application: the rotating ring outer circular surface is fixedly connected with a mounting frame, the mounting frame is slidingly connected with a push plate, the push plate bottom end is fixedly connected with a plug rod, one end of the plug rod penetrates through the mounting frame and is slidingly inserted with the socket one and the socket two, the push plate top end is fixedly connected with an advancing spring, one end of the advancing spring is fixedly connected with the mounting frame inner top end.

[0014] As a further scheme of the present application: the push plate bottom end is opened with a guide groove one, the mounting frame inner bottom end is opened with a guide groove two, and the guide groove one and the guide groove two are symmetrically distributed.

[0015] As a further scheme of the present application: the release member further comprises a top plate slidingly inserted with the guide groove one and the guide groove two, one end of the top plate is opened with a connecting hole one, the connecting hole one is inserted with a connecting rod one, one end of the connecting rod one is fixedly connected with a support plate, and one end of the support plate is fixedly opened with a connecting hole two.

[0016] As a further scheme of the present application: one end of the support plate is provided with an extension plate, and the extension plate two ends are also provided with the connecting rod one and the connecting hole two, and the connecting hole two on the support plate and the connecting rod one on the extension plate are inserted.

[0017] As a further scheme of the present application: the connecting hole two on the extension plate is inserted with a connecting rod two, one end of the connecting rod two is fixedly connected with a fixed block one, one side of the fixed block one is fixedly connected with a telescopic rod one, the telescopic rod one top end is fixedly connected with a clamping block one, one end of the top plate is opened with a connecting hole three, the connecting hole three is inserted with a connecting rod three, one end of the connecting rod three is fixedly connected with a fixed block two, one side of the fixed block two is fixedly connected with a telescopic rod two, and one end of the telescopic rod two is fixedly connected with a clamping block two.

[0018] A turning method for the outer circle of an automobile water tank branch pipe, comprising the following steps:

[0019] S1. First, select a connecting piece according to the length of the to-be-processed branch pipe, assemble the support structure through the stud and the threaded hole of the rotating shaft, butt the connecting piece with the main shaft of the lathe through a set of studs, and then coaxially sleeve the branch pipe outside the clamping block of the fixing piece, adjust to make the inner wall of the branch pipe abut against the rubber abutting block of the clamping block, and complete the feeding;

[0020] S2. After that, the extension plate drives the support plate and the top plate to slide, the top plate drives the push plate to disengage the insertion rod from the insertion hole one, the rotating ring is disconnected with the rotating shaft, and the fixed block one and the fixed block two are installed, the clamping block one and the clamping block two form temporary clamping, the main shaft is started to make the fixed part stationary, the threaded belt drives the clamping block to center clamping, and then the temporary assembly is disassembled, and the insertion rod is reset;

[0021] S3. Finally, the lathe main shaft is started again to drive the rotating shaft, the fixed part and the branch pipe to rotate synchronously, after the rotating speed is stable, the turning tool is started, and the branch pipe is turned along the outer circular surface according to the preset parameters until the outer circular surface machining of the branch pipe is completed.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] 1. In the present application, the design of the I-shaped cross section of the rotating ring in the fixed part realizes stable rotation with the rotating shaft, and the annular protrusion limits axial movement, avoiding machining deviation caused by displacement of the fixed part during high-speed rotation. The two groups of symmetrical and opposite threaded push threads ensure that the two groups of push rings move inward synchronously when the lathe rotates, realize symmetrical clamping of the two sides of the branch pipe, avoid eccentricity caused by single-sided clamping, and the four groups of evenly distributed connecting ears one and four and the corresponding adjusting rods one and two make the four groups of clamping blocks move radially synchronously and evenly, ensuring the centering accuracy. At the same time, the rubber abutting block of the clamping block and the anti-slip rubber layer of the clamping block one and two form flexible clamping from the inside and outside, which prevents the branch pipe from slipping and avoids metal scratches, ensuring that the surface roughness of the branch pipe meets the process requirements;

[0024] 2. In the present application, the threaded hole and stud design of the rotating shaft in the connecting part can flexibly splice multiple groups of connecting parts according to the length of the branch pipe, without the need to design tooling for different length branch pipes, improving length adaptability. The eight groups of insertion holes one and two in the rotating shaft of the same section of the part realize multi-angle positioning of the fixed part, which can be adjusted according to the clamping requirements, enhancing the use flexibility. The plug-in connection of the support plate and the extension plate can adjust the length of the assembly according to the length of the rotating shaft, adapt to different lathe specifications, and the extension stroke of the extension rod one and the extension rod two can cover branch pipes of different diameters, without the need to replace core components to compatible multiple specifications of branch pipes, greatly reducing the adaptation cost and changeover time;

[0025] 3. The invention is designed to provide downward elastic force for the push plate by releasing the pre-compression of the push spring in the release piece, ensuring stable insertion of the insertion rod into the insertion hole in the initial state without manual pressing and positioning, simplifying the operation process, and the triangular arc surface design of the top plate converts the axial force of the push plate into upward thrust force, saving effort and avoiding wear at the bottom end of the push plate, prolonging the service life of the components, the knurled handle of the arc-shaped clamping block one and two and the inner rod of the telescopic rod reduce the difficulty of manual operation, prevent hand slipping, and the T-shaped sliding groove and the connecting ear three provide precise guidance for the clamping block, avoid deviation of the clamping position, ensure processing stability, and reduce the waste rate. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the overall structure schematic diagram in the invention;

[0027] Figure 2 is the fixed state schematic diagram of the fixed piece in the invention;

[0028] Figure 3 is the structure schematic diagram of the fixed piece in the invention;

[0029] Figure 4 is the structure sectional view of the connecting piece in the invention;

[0030] Figure 5 is the structure schematic diagram of the mounting frame in the invention;

[0031] Figure 6 is the structure schematic diagram of the A place in the invention; Figure 5

[0032] Figure 7 is the structure sectional view of the rotating ring in the invention;

[0033] Figure 8 is the structure schematic diagram of the support plate in the invention;

[0034] Figure 9 is the structure schematic diagram of the release piece in the invention;

[0035] Figure 10 is the structure schematic diagram of the B place in the invention; Figure 9

[0036] Figure 11 is the structure schematic diagram of the C place in the invention. Figure 9

[0037] ​​​In the figure: 1, connecting piece; 11, rotating shaft; 12, threaded hole; 13, stud; 2, fixing piece; 21, rotating ring; 22, advancing thread; 23, advancing ring; 24, connecting ear one; 25, adjusting rod one; 26, connecting ear two; 27, clamping block; 28, sliding groove; 29, connecting ear three; 210, adjusting rod two; 211, connecting ear four; 212, hinged column; 3, releasing piece; 31, insertion hole one; 32, insertion hole two; 33, mounting frame; 34, push plate; 35, insertion rod; 36, advancing spring; 37, guide groove one; 38, guide groove two; 39, top plate; 310, connecting hole one; 311, connecting rod one; 312, support plate; 313, connecting hole two; 314, lengthening plate; 315, connecting rod two; 316, fixed block one; 317, telescopic rod one; 318, clamping block one; 319, connecting hole three; 320, connecting rod three; 321, fixed block two; 322, telescopic rod two; 323, clamping block two. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments of the present application will be described below according to the overall structure of the present application.

[0040] REFERENCE Figures 1 to 3The embodiment of the application discloses an outer circle turning tool for a support pipe of an automobile water tank, which comprises a connecting piece 1 connected with a lathe, a fixing piece 2 arranged on the connecting piece 1 and used for fixing the inner wall of the support pipe of the automobile water tank, a releasing piece 3 arranged on the fixing piece 2 and used for releasing the fixing piece 2, so that the fixing piece 2 does not rotate with the connecting piece 1, and the connecting piece 1 comprises a rotating shaft 11, a threaded hole 12 arranged on one side end surface of the rotating shaft 11, and a stud 13 arranged on the other side end surface of the rotating shaft 11 and matched with the threaded hole 12, and the connecting piece 1 is provided with multiple groups and is matched with the length of the support pipe of the automobile water tank, and adjacent two groups of the connecting pieces 1 are threadedly connected through the threaded hole 12 and the stud 13.

[0041] Reference Figures 3 to 4The fixing part 2 comprises a rotating ring 21 which is rotationally connected with the connecting part 1, the rotating ring 21 is in the shape of an I-beam, which can not only limit the axial movement during rotation through the annular protrusion, but also increase the contact area with the connecting part 1 to improve the stability of rotation and avoid shaking during high-speed rotation, the outer surface of the rotating shaft 11 is processed with a propelling thread 22, the propelling thread 22 adopts a trapezoidal tooth structure, the surface of the thread is treated by quenching to enhance the wear resistance, the outer side of the propelling thread 22 is threadedly connected with a propelling ring 23, two sets of rotating rings 21, propelling threads 22 and propelling rings 23 are arranged on each set of rotating shafts 11 in a matched manner, and the two sets of components are symmetrically distributed, one set of propelling threads 22 is right-handed, and the other set is left-handed, which ensures that the two sets of propelling rings 23 can move synchronously to the rotating ring 21 during subsequent actions, the propelling ring 23 is in the shape of a ring, the outer side of which is fixedly connected with four sets of connecting ears 24, the four sets of connecting ears 24 are evenly distributed along the circumference of the propelling ring 23, each set of connecting ears 24 is rotationally connected with a set of adjusting rods 25, each set of connecting ears 24 is made of an alloy steel plate, a through hole is formed in the alloy steel plate, and the through hole is rotationally connected with a pin shaft at the end of the adjusting rod 25, the adjusting rod 25 is in the shape of a mouth, and is hollow designed to reduce the weight and ensure the rigidity of the structure, thereby avoiding stress deformation, one end of each set of adjusting rods 25, which is away from the connecting ear 24, is rotationally connected with a set of connecting ears 26 through a pin shaft, the top end of the connecting ear 26 is fixedly connected with a clamping block 27, the clamping block 27 is an aluminum alloy in the shape of a cuboid, a semicircular rubber abutting block is bonded to the top end of the aluminum alloy in the shape of a cuboid, which can increase the friction with the inner wall of the branch pipe to prevent slipping and avoid scratching the branch pipe, a T-shaped sliding groove 28 is formed in the bottom end of the clamping block 27, a T-shaped connecting ear 29 is slidably connected in the sliding groove 28, and the gap between the two ensures smooth sliding without jamming and radial movement, the connecting ear 29 is rotationally connected with an adjusting rod 210 through a pin shaft, the adjusting rod 210 is identical in structure with the adjusting rod 25, one end of the adjusting rod 210, which is away from the connecting ear 29, is rotationally connected with a connecting ear 211 through a pin shaft, the connecting ear 211 is fixed to the outer surface of the rotating ring 21, and four sets of connecting ears 211 are evenly distributed on the outer surface of each rotating ring 21, which are in one-to-one correspondence with the connecting ears 24, the adjusting rod 25 is rotationally connected with a hinged column 212 near the middle position, the hinged column 212 is a stainless steel pin shaft, and spring grooves are formed at both ends of the hinged column 212, the hinged column 212 is fixed after penetrating through the adjusting rod 210 through a snap spring, which ensures that the hinged part of the adjusting rod 25 and the adjusting rod 210 rotates flexibly and will not come off, when the operator coaxially sleeves the automobile water tank branch pipe to be machined outside the two sets of symmetrical clamping blocks 27, ensures that the inner top end of the branch pipe and the rubber abutting block of one set of clamping blocks 27 are preliminarily attached, starts the lathe spindle, when the lathe spindle drives the connecting part 1 to rotate clockwise around its axis, the operating releasing part 3 keeps the fixing part 2 stationary and does not rotate with the connecting part 1, at this time, the two sets of propelling threads 22 on the connecting part 1 rotate with the connecting part 1, and the two sets of propelling rings 23 are driven to move synchronously to the corresponding rotating ring 21 due to the thread engagement, when the propelling ring 23 moves,The four groups of connecting ears 24 on the outer side are synchronously close to the rotating ring 21, and then drive the adjusting rod 25 on each group of connecting ears 24 to rotate around the hinge column 212 as the fulcrum. When the adjusting rod 25 rotates, because the adjusting rod 25 and the adjusting rod 210 are hinged through the hinge column 212, and the other end of the adjusting rod 210 is fixed on the rotating ring 21 through the connecting ear four 211, the rotation of the adjusting rod 25 forces the adjusting rod 210 to rotate synchronously, and the included angle between the two gradually decreases. When the included angle between the adjusting rod 25 and the adjusting rod 210 decreases, the adjusting rod 25 pushes the clamping block 27 to move in the radial direction away from the axis of the connecting piece 1, and at the same time, the T-shaped sliding groove 28 at the bottom end of the clamping block 27 is smoothly slid in the direction away from the hinge column 212, providing accurate guidance for the clamping block 27. When the rubber abutting block at the top end of the clamping block 27 tightly abuts against the inner wall of the branch pipe, and the load of the lathe main shaft reaches the preset value, the advancing ring 23 stops moving, and the centering and clamping of the branch pipe is completed. At this time, the turning tool can be started to process the outer circle of the branch pipe.

[0042] By adopting the above scheme: through the design of the I-shaped cross section of the rotating ring 21, stable rotation cooperation with the connecting piece 1 and axial movement are realized, the rotation stability of the whole device is improved, the size error of the outer circle of the branch pipe caused by movement during processing is avoided, through the two groups of symmetrically distributed and opposite threaded advancing threads 22, the synchronous inward movement of the two groups of advancing rings 23 during the rotation of the lathe is ensured, the symmetric clamping of the two sides of the branch pipe is realized, and the eccentricity of the branch pipe caused by unilateral clamping is avoided, through the four groups of evenly distributed connecting ears one 24, connecting ears four 211 and corresponding adjusting rods one 25, adjusting rods two 210, the radial movement of the four groups of clamping blocks 27 is synchronous and the force is uniform, the centering accuracy of the branch pipe is guaranteed, the shape and position tolerance requirements of the subsequent turning are met, through the semicircular rubber abutting block at the top end of the clamping block 27, the friction force with the inner wall of the branch pipe is increased to prevent the branch pipe from slipping during processing, and direct metal contact is avoided to scratch the inner wall of the branch pipe, protecting the surface quality of the branch pipe, through the close cooperation of the T-shaped sliding groove 28 and the T-shaped connecting ear three 29, accurate guidance is provided for the radial movement of the clamping block 27, the deviation of the clamping block 27 is avoided, and the accuracy of the clamping position is ensured.

[0043] Reference Figures 5 to 9The releasing piece 3 comprises a first insertion hole 31 formed in the outer surface of the rotating shaft 11, the first insertion hole 31 is a cylindrical hole, perpendicular to the axis of the rotating shaft 11 and penetrating the outer surface of the rotating shaft 11, the outer surface of the rotating ring 21 is provided with a second insertion hole 32, the diameter of the second insertion hole 32 is consistent with that of the first insertion hole 31, and the depth of the second insertion hole 32 is the same as the wall thickness of the rotating ring 21, eight groups of first insertion holes 31 and eight groups of second insertion holes 32 are uniformly arranged at the same horizontal section of the rotating shaft 11, the outer surface of the rotating ring 21 is welded with a mounting frame 33, the mounting frame 33 is a mouth-shaped structure, the mounting frame 33 is provided with four groups, which are uniformly distributed along the outer surface of the rotating ring 21, each group of mounting frame 33 is slidably connected with a group of push plates 34 inside, the push plate 34 is a cuboid structure, the surface is sprayed with a polytetrafluoroethylene coating to reduce the sliding friction coefficient, the bottom end of the push plate 34 is welded with an insertion rod 35 at the center position, one end of the insertion rod 35 penetrates the bottom end of the mounting frame 33, and can be gap-fitted with the first insertion hole 31 and the second insertion hole 32, so as to ensure that the insertion is stable and easy to plug and pull, the first insertion hole 31 and the second insertion hole 32 are completely aligned and communicated in the initial state, so as to ensure that the insertion rod 35 can be smoothly inserted, two groups of push springs 36 are symmetrically and fixedly connected to the top end of each group of push plates 34, the push spring 36 is a cylindrical helical compression spring, which is pre-compressed in the initial state to provide a continuous downward elastic force to ensure that the insertion rod 35 is stably inserted into the insertion hole, one end of the push spring 36 away from the push plate 34 is welded and fixed to the inside top end of the mounting frame 33, two groups of guide grooves 37 are symmetrically formed in the bottom end of the push plate 34, and two groups of guide grooves 38 are correspondingly formed in the inside bottom end of the mounting frame 33, the guide grooves 37 and the guide grooves 38 are both rectangular grooves, and form a complete guide channel after being aligned, the releasing piece 3 further comprises a top plate 39 which is slidably inserted into the guide grooves 37 and the guide grooves 38, the top plate 39 is a triangular structure, the top end is an arc surface, the width is consistent with that of the guide groove, and the top plate 39 can smoothly slide along the guide groove, a connecting hole 310 is formed in one end of the top plate 39 away from the arc surface, a connecting rod 311 is inserted into the connecting hole 310 with interference, one end of the connecting rod 311 away from the top plate 39 is welded with a support plate 312, the support plate 312 is a rectangular steel plate, a connecting hole 313 is formed in one end of the support plate 312, a lengthening plate 314 is provided at one end of the support plate 312, the lengthening plate 314 is consistent with the support plate 312, both ends are welded with the connecting rod 311 and provided with the connecting hole 313, and the connecting hole 313 of the support plate 312 and the connecting rod 311 of the lengthening plate 314 can be gap-fitted to realize quick splicing of the support plate 312 and the lengthening plate 314, adapt to rotating shafts 11 with different lengths, the length of the support plate 312 after being connected with the top plate 39 is the same as the length of the rotating shaft 11, the length of the lengthening plate 314 is the same as the length of the support plate 312 and the top plate 39 after being connected, when the device is in the initial fixed state, the pre-compression force of the push spring 36 pushes the push plate 34 to move downward, so that the insertion rod 35 penetrates the mounting frame 33 and is inserted into the first insertion hole 31 and the second insertion hole 32, at this time, the fixing piece 2 and the rotating shaft 11 are fixed by the insertion rod 35 and cannot rotate relative to each other,When it is necessary to release the connection between the fixing part 2 and the rotating shaft 11 to start the clamping action, the operator pushes the lengthened plate 314 along the axis direction of the rotating shaft 11, drives the support plate 312 inserted with the lengthened plate 314 to move synchronously, and the support plate 312 pushes the top plate 39 along the guide groove one 37 and the guide groove two 38 through the connecting rod one 311, when the arc surface end of the top plate 39 contacts the bottom end of the push plate 34, with the continuous sliding of the top plate 39, the arc surface generates an upward thrust, which overcomes the elastic force of the push spring 36 to push the push plate 34 to move upward, the push plate 34 drives the insertion rod 35 to move upward synchronously until the insertion rod 35 is completely separated from the insertion hole one 31 and only remains in the insertion hole two 32, at this time, the connection between the fixing part 2 and the rotating shaft 11 is released, when the branch pipe processing is completed and it is necessary to restore the fixing, the operator pulls the lengthened plate 314 until the lengthened plate 314, the support plate 312 and the top plate 39 are pulled out of the guide groove, so that the push spring 36 restores the original length, under the action of the elastic force of the push spring 36, the insertion rod 35 is pushed to reinsert the insertion hole one 31 and the insertion hole two 32, so that the fixing part 2 and the rotating shaft 11 restore the fixed state, which is convenient for the overall disassembly or adjustment of the device.

[0044] By adopting the above scheme: through the uniform distribution of the eight groups of insertion hole one 31 and the eight groups of insertion hole two 32 at the same horizontal section of the rotating shaft 11, the multi-angle positioning of the fixing part 2 in the circumferential direction of the rotating shaft 11 is realized, the fixed position can be adjusted according to the processing requirement of the branch pipe, the universality of the device is improved, through the pre-compression design of the push spring 36, the downward elastic force can be automatically provided for the push plate 34, so that the insertion rod 35 is stably inserted into the insertion hole, manual pressing positioning is not needed, the operation convenience is improved, through the cooperation of the guide groove one 37 at the bottom end of the push plate 34 and the guide groove two 38 of the mounting frame 33, the precise sliding guide is provided for the top plate 39, the uneven stress of the push plate 34 caused by the deviation of the top plate 39 is avoided, the smooth insertion and extraction action of the insertion rod 35 is ensured, through the triangular arc surface design of the top plate 39, the axial force of the operator pushing the lengthened plate 314 is converted into the upward thrust of the push plate 34, which is labor-saving and avoids the damage of the bottom end of the push plate 34, prolongs the service life of the component, through the plug-in connection of the support plate 312 and the lengthened plate 314, the lengthened plate 314 can be flexibly spliced according to the length of the rotating shaft 11, which is suitable for different specifications of the lathe connecting part 1, and reduces the adaptation cost of the device.

[0045] Reference Figures 9 to 11The connecting hole two 313 at the end of the lengthened plate 314 away from the supporting plate 312 is inserted with the connecting rod two 315 in a clearance fit, the end away from the connecting hole two 313 is fixedly connected with the fixed block one 316 through arc welding, the center position on one side of the fixed block one 316 is fixedly welded with the telescopic rod one 317, the telescopic rod one 317 is a spring telescopic rod, which is composed of an outer cylinder and a plurality of groups of sleeved inner cylinders, the inner cylinder can slide axially along the outer cylinder, and a contraction spring is built inside the inner cylinder, the contraction spring is in a pre-compressed state in an initial state, and the inner rod is completely retracted into the outer cylinder, the top end of the telescopic rod one 317 is fixedly welded with the clamping block one 318, the clamping block one 318 is of an arc structure, adopts a structure of wrapping a thick nitrile rubber layer outside a metal core, and rhombic anti-skid lines are formed on the surface of the rubber layer, and an arc-shaped holding edge is further arranged on the outer side, so that manual force application is facilitated, the end of the top plate 39 away from the connecting rod one 311 is provided with the connecting hole three 319, the connecting hole three 319 is inserted with the connecting rod three 320 in a same clearance fit, the structure and material of the connecting rod three 320 are completely consistent with those of the connecting rod two 315, one end of the connecting rod three 320 is fixedly welded with the fixed block two 321, one side of the fixed block two 321 is fixedly welded with the telescopic rod two 322, the telescopic rod two 322 is consistent in specification with the telescopic rod one 317, one end of the telescopic rod two 322 is fixedly welded with the clamping block two 323, the clamping block two 323 is the same in structure as the clamping block one 318 and is symmetrically arranged, and the fixed block one 316, the telescopic rod one 317 and the clamping block one 318 and the fixed block two 321, the telescopic rod two 322 and the clamping block two 323 are all correspondingly arranged in four groups and are uniformly distributed along the end face circumferential direction of the rotating shaft 11, when it is necessary to make fixing preparation before turning the outer circle of the automobile water tank branch pipe, an operator first coaxially sleeves the to-be-processed branch pipe outside the fixing part 2, then slowly inserts the end protrusions of the lengthened plate 314, the supporting plate 312 and the top plate 39 into the guide groove one 37 and the guide groove two 38 in alignment, until the top plate 39 pushes the push plate 34 to move upwards, the inserting rod 35 is completely separated from the inserting hole one 31, the connection between the rotating ring 21 and the rotating shaft 11 is formally released, at this time, the fixed block one 316 is inserted into the connecting hole two 313 of the lengthened plate 314 through the connecting rod two 315, and the fixed block two 321 is inserted into the connecting hole three 319 of the top plate 39 through the connecting rod three 320, so that it is ensured that the connection of the two groups is not loose, then the operator holds the holding edges outside the clamping block one 318 and the clamping block two 323 with fingers, manually pulls away from the center of the rotating shaft 11, the contraction spring inside the telescopic rod one 317 and the telescopic rod two 322 gradually releases the elastic potential energy, the inner cylinder extends along the outer cylinder, until the rubber layers inside the clamping block one 318 and the clamping block two 323 completely adhere to the outer circle surface of the branch pipe, a stable temporary clamping is formed, when the lathe drives the rotating shaft 11 to rotate around its axis, due to the static friction between the clamping block one 318, the clamping block two 323 and the outer circle of the branch pipe, and the lengthened plate 314 and the top plate 39 are limited by the guide grooves and cannot rotate, the fixing part 2 remains stationary with the branch pipe, the advancing thread 22 on the connecting part 1 rotates with the rotating shaft 11, drives the advancing ring 23 to move towards the rotating ring 21, and finally pushes the clamping block 27 to clamp the inner wall of the branch pipe through the adjusting plate assembly,After the outer circle of the branch pipe is finished, the operator pushes the clamping block one 318 and the clamping block two 323 in reverse, the telescopic rod one 317 and the telescopic rod two 322 are reset, and then the extension plate 314, the support plate 312 and the top plate 39 are pulled out, so that the finished branch pipe can be taken out.

[0046] By adopting the above scheme: through the four groups of uniformly distributed and symmetrical clamping block one 318 and clamping block two 323, the outer circle of the branch pipe is uniformly stressed, the deformation of the branch pipe caused by unilateral clamping is avoided, the coaxial accuracy of subsequent hole clamping is ensured, through the butyl rubber layer with anti-skid pattern on the inner side of the clamping block, the friction with the outer circle of the branch pipe can be increased to prevent slipping during temporary clamping, and direct contact between metal and the outer circle of the branch pipe can be avoided to avoid scratching the outer circle of the branch pipe, through the arc-shaped holding edge on the outer side of the clamping block and the knurling treatment of the inner rod of the telescopic rod, the difficulty of manually pulling the clamping block is reduced, the hands of the operator are prevented from slipping, and the comfort and efficiency of manual operation are improved, through the pre-compression design of the telescopic rod inside the telescopic rod, stable clamping force can be generated when released, and temporary clamping is ensured to be firm, providing reliable guarantee for keeping the fixed part 2 stationary.

[0047] The working principle of the present application is: when the operator uses the automobile water tank branch pipe outer circle turning tool, first, according to the length of the to-be-processed branch pipe, select the corresponding number of connecting pieces 1, threadedly connect the adjacent two groups of connecting pieces 1 through the stud 13 on one side of the rotating shaft 11 and the threaded hole 12 on the other side, assemble the support structure matched with the length of the branch pipe, then, through the stud 13 on one side of the rotating shaft 11, fixedly connect the assembled connecting piece 1 as a whole with the lathe spindle, complete the butt joint of the tool and the lathe, then, coaxially sleeve the to-be-processed automobile water tank branch pipe outside the clamping block 27 of the fixing piece 2, adjust the position of the branch pipe, ensure that the inner wall of the branch pipe preliminarily fits the semicircular rubber abutting block at the top of the clamping block 27, make the branch pipe keep coaxial positioning, complete the feeding, next, push the lengthening plate 314 along the axis direction of the rotating shaft 11, drive the support plate 312 inserted with the lengthening plate 314 to move synchronously, the support plate 312 pushes the top plate 39 through the connecting rod one 311, makes the top plate 39 stably slide along the guide groove one 37 and the guide groove two 38, when the arc surface end of the top plate 39 contacts the bottom end of the push plate 34, continue to push the lengthening plate 314, the arc surface will generate upward thrust, overcome the pre-tightening elastic force of the advancing spring 36, drive the push plate 34 to move upward, the push plate 34 synchronously pulls the insertion rod 35 to rise, until the insertion rod 35 completely separates from the insertion hole one 31 and only exists in the insertion hole two 32, at this time, the fixed connection between the rotating ring 21 and the rotating shaft 11 is formally released, then, insert the fixed block one 316 into the connecting hole two 313 of the lengthening plate 314 through the connecting rod two 315, at the same time, insert the fixed block two 321 into the connecting hole three 319 of the top plate 39 through the connecting rod three 320, ensure that the two groups of connections are not loose, the operator holds the holding edges outside the clamping block one 318 and the clamping block two 323, slowly pulls away from the center of the rotating shaft 11, the contraction spring inside the telescopic rod one 317 and the telescopic rod two 322 gradually releases the elastic potential energy, the inner cylinder extends outward along the outer cylinder, until the rubber layers inside the clamping block one 318 and the clamping block two 323 completely fit the outer circle surface of the branch pipe, form a stable annular temporary clamping, then, start the lathe spindle, drive the rotating shaft 11 to rotate clockwise, because of the static friction force between the temporarily clamped rubber layer and the outer circle of the branch pipe, and the lengthening plate 314 and the top plate 39 are limited by the guide grooves and cannot rotate, the fixing piece 2 keeps static state, at this time, the two groups of advancing threads 22 on the connecting piece 1 rotate synchronously with the rotating shaft 11, drive the two groups of advancing rings 23 to move synchronously to the rotating ring 21 through the thread meshing effect, the connecting lug one 24 outside the advancing ring 23 approaches the rotating ring 21, in turn, drive the adjusting rod one 25 to rotate with the hinge column 212 as the fulcrum, because the adjusting rod one 25 and the adjusting rod two 210 are hinged through the hinge column 212, and the other end of the adjusting rod two 210 is fixed on the rotating ring 21 through the connecting lug four 211, the rotation of the adjusting rod one 25 will force the adjusting rod two 210 to rotate synchronously, the included angle between the two gradually decreases, the adjusting rod one 25 pushes the clamping block 27 to move in the radial direction away from the axis of the rotating shaft 11 through the connecting lug two 26,Meanwhile, the connecting lug three 29 slides in the T-shaped sliding groove 28 at the bottom end of the clamping block 27 in the direction away from the hinged column 212, providing accurate guidance for the clamping block 27. When the rubber abutting block at the top end of the clamping block 27 tightly abuts the inner wall of the branch pipe, and the load of the lathe main shaft reaches the preset value, the centering and clamping process of the branch pipe is completed, preparing for machining the outer circle of the branch pipe. First, the plug-in cooperation of the connecting rod two 315 and the connecting hole two 313, and the plug-in cooperation of the connecting rod three 320 and the connecting hole three 319 are sequentially pulled out, and the fixed block one 316, the telescopic rod one 317, the clamping block one 318, and the fixed block two 321, the telescopic rod two 322, and the clamping block two 323 are removed. Then, the elongated plate 314 is pulled in the reverse direction, and the top plate 39 and the support plate 312 are pulled out of the guide groove one 37 and the guide groove two 38. After the push spring 36 loses the pushing force and returns to its original length, it pushes the push plate 34 to reset downward under the action of the elastic force, drives the plug rod 35 to reinsert into the plug hole one 31 and the plug hole two 32, and makes the fixing part 2 and the rotating shaft 11 restore the fixed connection. At this time, the fixing part 2 can rotate synchronously with the rotating shaft 11. Finally, the lathe main shaft is started again to drive the rotating shaft 11, the fixing part 2, and the clamped branch pipe to rotate synchronously and coaxially. After the speed stabilizes, the turning tool is started to perform outer turning along the outer circular surface of the branch pipe according to the preset machining parameters, until the machining of the outer circle of the branch pipe is completed. Through the design of the I-shaped cross section of the rotating ring 21 in the fixing part 2, stable rotation cooperation with the rotating shaft 11 is realized, and axial movement is limited through the annular protrusion to avoid machining deviation caused by displacement of the fixing part 2 during high-speed rotation. Two groups of symmetrical and opposite threaded push-in threads 22 ensure that the two groups of push-in rings 23 move synchronously inward when the lathe rotates, realize symmetrical clamping of the branch pipe on both sides, avoid eccentricity caused by unilateral clamping, and further ensure that the four groups of clamping blocks 27 move synchronously and evenly in the radial direction, ensuring the centering accuracy. At the same time, the rubber abutting block of the clamping block 27 and the anti-slip rubber layer of the clamping block one 318 and the clamping block two 323 form flexible clamping from the inside and outside, preventing the branch pipe from slipping and avoiding metal scratches, ensuring that the surface roughness of the branch pipe meets the process requirements. Through the design of the threaded hole 12 and the threaded column 13 of the rotating shaft 11 in the connecting part 1, multiple groups of connecting parts 1 can be flexibly spliced according to the length of the branch pipe, without the need to design separate tooling for different lengths of the branch pipe, improving the length adaptability. The eight groups of plug hole one 31 and plug hole two 32 of the rotating shaft 11 in the release part 3 realize multi-angle positioning of the fixing part 2, which can be adjusted according to the clamping requirements, enhancing the use flexibility. The plug-in connection of the support plate 312 and the elongated plate 314 can adjust the length of the assembly according to the length of the rotating shaft 11, adapt to different lathe specifications, and further cover different diameters of the branch pipe through the telescopic stroke of the telescopic rod one 317 and the telescopic rod two 322, without the need to replace the core components to be compatible with multiple specifications of the branch pipe, greatly reducing the adaptation cost and the changeover time. Through the release of the pre-compression design of the push spring 36 in the release part 3, the push plate 34 is automatically provided with downward elastic force,Ensure that the initial state of the plug-in rod 35 is stably inserted into the socket, without the need for manual pressing and positioning, simplifying the operation process. The triangular arc surface design of the top plate 39 converts the axial force of the extension plate 314 into upward thrust of the push plate 34, saving effort and avoiding wear at the bottom end of the push plate 34, prolonging the service life of the components. The arc-shaped gripping edge of the clamping block one 318 and the clamping block two 323 and the knurled treatment of the inner rod of the telescopic rod reduce the difficulty of force exertion in manual operation, prevent hand slipping, and at the same time, the close cooperation of the T-shaped sliding groove 28 and the connecting lug three 29 provides precise guidance for the clamping block 27, avoids deviation of the clamping position, ensures processing stability, and reduces the waste rate.

[0048] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, within the technical scope disclosed by the present application, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change, which should be covered within the protection scope of the present application.

Claims

1. An outer circle turning tool for a support pipe of an automobile water tank, comprising: The utility model relates to a connecting piece (1) connected with lathe, its characterized in be provided with the fixed part (2) of the fixed car water tank branch pipe inner wall on the connecting piece (1), be provided with the release part (3) of the fixed part (2) to release the restriction of fixed part (2), make fixed part (2) not follow the rotation of connecting piece (1) with the connecting piece (1) connected with lathe, The connecting piece (1) comprises a rotating shaft (11), a threaded hole (12) is arranged on one side end face of the rotating shaft (11), and a threaded stud (13) adapted to the threaded hole (12) is formed on the other side end face of the rotating shaft (11); The fixed part (2) comprises a clamping block (27) and a rotating ring (21) rotatably connected with the connecting piece (1), a propelling thread (22) is formed on the outer circular surface of the rotating shaft (11), a propelling ring (23) is threadedly connected to the outer side of the propelling thread (22), an adjusting rod one (25) is arranged between the propelling ring (23) and the clamping block (27), an adjusting rod two (210) is arranged between the rotating ring (21) and the clamping block (27), the adjusting rod one (25) and the adjusting rod two (210) are arranged in a cross manner, a hinged column (212) is rotatably connected to the adjusting rod one (25), the hinged column (212) penetrates the adjusting rod two (210), and the adjusting rod one (25) and the adjusting rod two (210) are hinged through the hinged column (212); The propelling ring (23) is fixedly connected with a connecting lug one (24) on the outer side, the clamping block (27) is fixedly provided with a connecting lug two (26) at the bottom end, the adjusting rod one (25) is rotatably arranged between the connecting lug one (24) and the connecting lug two (26), a sliding groove (28) is formed at the bottom end of the clamping block (27), a connecting lug three (29) is slidably connected in the sliding groove (28), and a connecting lug four (211) is fixedly arranged on the outer circular surface of the rotating ring (21); Two groups of rotating rings (21), propelling threads (22) and propelling rings (23) are arranged on each group of rotating shafts (11), and the two groups of rotating rings (21), propelling threads (22) and propelling rings (23) are symmetrically distributed, and the directions of the two groups of propelling threads (22) are opposite; The release part (3) comprises a plug hole one (31) formed on the outer circular surface of the rotating shaft (11), and a plug hole two (32) formed through the outer circular surface of the rotating ring (21), and the plug hole one (31) and the plug hole two (32) are in communication in the initial state; The rotating ring (21) is fixedly connected with a mounting frame (33), the mounting frame (33) is slidably connected with a push plate (34), the push plate (34) is fixedly connected with a plug rod (35) at the bottom end, one end of the plug rod (35) penetrates the mounting frame (33) and is slidably inserted into the plug hole one (31) and the plug hole two (32), the push plate (34) is fixedly connected with a propelling spring (36) at the top end, and one end of the propelling spring (36) is fixedly connected with the inside top end of the mounting frame (33). The push plate (34) is provided with a guide groove one (37) at the bottom end, the mounting frame (33) is provided with a guide groove two (38) at the bottom end, and the guide groove one (37) and the guide groove two (38) are symmetrically distributed; The release part (3) further comprises a top plate (39) slidably connected with the guide groove one (37) and the guide groove two (38), one end of the top plate (39) is provided with a connecting hole one (310), a connecting rod one (311) is inserted into the connecting hole one (310), one end of the connecting rod one (311) is fixedly connected with a supporting plate (312), and the supporting plate (312) is fixedly provided with a connecting hole two (313) at one end. When the lathe drives the connecting part (1) to rotate around the axis, and the release part (3) does not rotate with the fixing part (2), the advancing screw (22) drives the advancing ring (23) to move towards the rotating ring (21), the connecting lug one (24) is synchronously close, drives the adjusting rod one (25) to rotate around the hinge column (212), because the adjusting rod one (25) is hinged with the adjusting rod two (210), and the adjusting rod two (210) is fixed below the clamping block (27) through the connecting lug four (211), the included angle between the adjusting rod one (25) and the adjusting rod two (210) is reduced, the clamping block (27) is driven to move radially, the end of the adjusting rod two (210) slides in the sliding groove (28), and finally abuts against the inner wall of the branch pipe to realize centering and clamping.

2. The outer circle turning tool for the support pipe of the water tank of the vehicle according to claim 1, wherein One end of the supporting plate (312) is provided with an extension plate (314), and the extension plate (314) is also provided with a connecting rod one (311) and a connecting hole two (313) at both ends.

3. The outer circle turning tool for a support pipe of an automobile water tank according to claim 2, wherein The connecting hole two (313) in the extension plate (314) is inserted with a connecting rod two (315), one end of the connecting rod two (315) is fixedly connected with a fixed block one (316), one side of the fixed block one (316) is fixedly connected with a telescopic rod one (317), the top end of the telescopic rod one (317) is fixedly connected with a clamping block one (318), one end of the top plate (39) is provided with a connecting hole three (319), the connecting hole three (319) is inserted with a connecting rod three (320), one end of the connecting rod three (320) is fixedly connected with a fixed block two (321), one side of the fixed block two (321) is fixedly connected with a telescopic rod two (322), and one end of the telescopic rod two (322) is fixedly connected with a clamping block two (323).

4. A method for turning the outer circle of the automobile water jacket branch pipe, using the automobile water jacket branch pipe outer circle turning tool of claim 3, characterized in that, The method comprises the following steps: S1. First, select the connecting part (1) according to the length of the branch pipe to be processed, assemble the supporting structure through the stud (13) and the threaded hole (12) of the rotating shaft (11), butt joint the connecting part (1) with the main shaft of the lathe through a group of studs (13), and then coaxially sleeve the branch pipe outside the clamping block (27) of the fixing part (2), and adjust until the inner wall of the branch pipe abuts against the rubber abutting block of the clamping block (27), and complete the feeding. S2. After that, the extension plate (314) drives the support plate (312) and the top plate (39) to slide, the top plate (39) pushes the push plate (34) to make the insertion rod (35) disengage from the insertion hole (31), the connection between the rotating ring (21) and the rotating shaft (11) is released, the fixed block (316) and the fixed block (321) are installed, the clamping block (318) and the clamping block (323) form temporary clamping, the main shaft is started to make the fixing part (2) stationary, the threaded hole (22) drives the clamping block (27) to center and clamp, the temporary assembly is disassembled, and the insertion rod (35) is reset; S3. Finally, the lathe main shaft is started again to drive the rotating shaft (11), the fixing part (2) and the branch pipe to rotate synchronously, after the rotating speed is stable, the turning tool is started, and the outer circular surface of the branch pipe is turned according to the preset parameters until the outer circular surface machining of the branch pipe is completed.

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