CN109702067B - Spinning method for pipe fitting and spinning machine with improved structure - Google Patents

Spinning method for pipe fitting and spinning machine with improved structure Download PDF

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Publication number
CN109702067B
CN109702067B CN201811599122.1A CN201811599122A CN109702067B CN 109702067 B CN109702067 B CN 109702067B CN 201811599122 A CN201811599122 A CN 201811599122A CN 109702067 B CN109702067 B CN 109702067B
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feeding
spinning
pipe
hole
cutter
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CN109702067A (en
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赖如福
李良有
黄茂德
张玉明
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Zhengjiang Changxing Heliang Intelligent Equipment Co Ltd
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Zhengjiang Changxing Heliang Intelligent Equipment Co Ltd
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Abstract

The invention relates to a spinning method for pipe fitting and a spinning machine with improved structure, and belongs to the technical field of pipe processing. The pipe spinning method comprises the following steps: (1) Pre-cutting an annular section groove on the inner peripheral surface of the front end part of the tube blank according to the length of the target forming part, wherein the annular section groove and the front end part are coaxially arranged; (2) Spin-forming a formed pipe part with a preset shape on the front end part of the pipe blank; (3) The front end portion is cut inward at a position corresponding to the annular cross-section groove on the outer peripheral surface of the front end portion, and a molded article is obtained. The pipe fitting spinning method can be used for processing, subsequent processing procedures can be effectively reduced, and the pipe fitting spinning method can be widely applied to the manufacturing fields of refrigeration, automobiles, aviation and the like.

Description

Spinning method for pipe fitting and spinning machine with improved structure
Technical Field
The invention relates to pipe processing equipment, in particular to a pipe spinning method and a spinning machine suitable for the pipe spinning method.
Background
A spinning machine is disclosed in patent document publication No. CN108856542a, which includes a chuck for gripping a workpiece to be spun and a spinning head rotated about a rotation axis relative to the chuck; the spinning machine head comprises spinning wheels and an extrusion driver for driving the two spinning wheels to reciprocate along the extrusion direction. In the working process, a pipe blank to be subjected to spinning treatment is clamped on a clamping machine head, the clamping machine head and the spinning machine head are controlled to rotate relatively around a rotating axis, and meanwhile, two spinning wheels are controlled to extrude inwards along the radial direction of the pipe blank, namely, move along the extrusion direction, so that the pipe blank clamped on the clamping machine head is subjected to spinning processing. In this patent document, the spinning roller is kept stationary by driving the chuck to rotate the tube blank. In addition, some spinning machines are used in spinning processes in which the spinning head and tube blank remain stationary, and by driving the spinning wheel about the axis of rotation, such as the spinning machine disclosed in patent publication CN108080480 a.
Before feeding the spinning machine, a long pipe blank is cut into short pipe sections according to the length required by spinning, then the short pipe sections are fed from the front side of a clamping machine head, a long pipe section is reserved and is required to be cut off for convenient clamping, and a cutting device is arranged beside a spinning wheel to cut off a formed part and excess materials, so that processing errors caused by working procedures and repeated clamping are saved.
Disclosure of Invention
The main purpose of the invention is to provide a pipe fitting spinning method capable of reducing subsequent processing procedures;
another object of the present invention is to provide a spinning machine suitable for using the above pipe spinning method.
In order to achieve the above main purpose, the pipe spinning method provided by the invention sequentially comprises the following steps:
an inner Zhou Yu cutting step of precutting an annular cross-section groove on the inner peripheral surface of the front end portion of the tube blank according to the length of the target formed piece, the annular cross-section groove being coaxially arranged with the front end portion;
a spinning forming step of spinning forming a formed pipe part with a preset shape on the front end part of the pipe blank;
And an outer Zhou Caiduan step of cutting the front end portion inward at a position corresponding to the annular cross-section groove on the outer peripheral surface of the front end portion to obtain a molded article.
The cutting step in the existing pipe spinning method is divided into an inner peripheral surface pre-cutting step which is firstly performed and an outer Zhou Caiduan step which is performed again, so that burrs at the cut are reduced, and the subsequent processing procedures of a formed part are reduced; and the cutting process can be based on clamping and positioning in the spinning process, so that the processing precision of the spinning piece can be effectively improved, and related procedures can be reduced.
In the inner circumference pre-cutting step, the groove depth of the annular section groove is less than or equal to one half of the thickness of the tube blank; the groove depth of the annular section groove is more than or equal to one third of the thickness of the tube blank. The connection strength between the formed pipe part and the pipe blank is effectively ensured.
The groove side wall surface of the annular section groove facing the forming pipe part forms a chamfer surface of the inner edge of the end surface of the forming piece. So as to cut the section groove better while reducing the subsequent procedures.
Another preferred embodiment is to perform the tube end finishing step after the spin forming step: at least the reduced portion of the formed tube portion is subjected to end face flattening treatment and/or inner hole trimming treatment. Further reducing the subsequent processing procedures.
In the process of obtaining the formed part, the clamping claw arranged on the front end part of the rotary main shaft is used for clamping the pipe blank only once; in the process, only the rotary main shaft is used for driving the tube blank material to rotate around the rotary axis through the material clamping claw; the rotary main shaft is internally provided with a feeding through hole, a pipe blank extends into the rotary main shaft from the tail side of the feeding through hole to carry out tail side feeding, and the length of the pipe blank is greater than twice the hole length of the feeding through hole. Based on single positioning and clamping, other subsequent processing procedures are performed to improve the processing precision and reduce the processing procedures; in addition, the tail feeding is matched with the front end cutting, so that the processing efficiency can be further improved, and the waste of pipe blanks can be reduced.
In order to achieve the other purpose, the spinning machine provided by the invention comprises a frame, a spinning machine head and a clamping machine head, wherein the spinning machine head and the clamping machine head are arranged on the frame and driven by a rotary driving device to relatively rotate around a rotary axis; the spinning machine head comprises a spinning wheel, an installation sliding plate and a feeding travelling mechanism, wherein the feeding travelling mechanism at least can be used for driving the installation sliding plate to move along the extending direction of the rotating axis and the transverse two-dimensional space perpendicular to the extending direction, and the material clamping machine head comprises a rotating main shaft and a material clamping claw arranged on the front end part of the rotating main shaft; the spinning machine comprises a cutting device positioned at the front side of the material clamping machine head; the cutting device comprises a mounting slide plate, a feeding travelling mechanism, an outer Zhou Qieduan cutter arranged on the mounting slide plate through a first cutter holder and an inner Zhou Yuqie cutter arranged on the mounting slide plate through a second cutter holder; the rotating wheel, the outer Zhou Qieduan cutter and the inner Zhou Yuqie cutter are transversely distributed at intervals, and machining avoiding intervals are reserved among the rotating wheel, the outer Zhou Qieduan cutter and the inner Zhou Yuqie cutter; the second tool apron is slidably mounted on a mounting slide plate, and an axial feeding driving mechanism for driving the second tool apron to reciprocate along the extending direction is mounted on the mounting slide plate.
The cutting tool is arranged to comprise the outer Zhou Qieduan tool and the inner Zhou Yu cutting tool, so that the cutting step in the existing pipe spinning method can be split into the inner peripheral surface pre-cutting step and the outer Zhou Caiduan step, burrs and the like are effectively reduced, and subsequent processing procedures are reduced. In addition, based on the feeding of the rotary wheel and the cutting tool by the same feeding driving mechanism, the one-time clamping positioning precision by utilizing the clamping claw can be provided, the number of related parts can be reduced, and the layout of the whole machine head structure is more reasonable.
The spinning machine comprises a pipe end trimming device, wherein the pipe end trimming device comprises a mounting slide plate, a feeding travelling mechanism, an outer Zhou Qieduan cutter and an inner hole turning cutter which is mounted on the mounting slide plate through a third cutter holder; the rotating wheel, the outer Zhou Qieduan cutter, the inner Zhou Yu cutter and the inner hole turning cutter are transversely distributed at intervals, and machining avoiding intervals are reserved among the rotating wheel, the outer Zhou Qieduan cutter, the inner Zhou Yu cutter and the inner hole turning cutter. The pipe end trimming device which shares the same feeding mechanism and clamping mechanism is additionally arranged, so that the processing precision is ensured, and meanwhile, the subsequent procedures are reduced.
The preferable scheme is that a feeding through hole arranged along the extending direction is arranged on the rotary main shaft, and the spinning machine comprises a tail feeding device positioned at the tail side of the feeding through hole; the tail feeding device comprises a feeding bracket, a feeding push rod which is slidably arranged on the feeding bracket, and a feeding driving unit which is used for driving the feeding push rod to feed along the extending direction so as to feed; the length of the feeding push rod is longer than that of the feeding through hole; the movable travel of the feeding push rod on the feeding bracket is more than or equal to twice the length of the feeding through hole. By adopting the tail feeding, the time required by the feeding process can be reduced, so as to improve the processing rate.
The feeding driving unit comprises a guide frame slidably arranged on a feeding bracket, a pushing frame positioned at the tail side of the guide frame, a linear displacement output device for driving the pushing frame to move along the extending direction, and a spacing maintaining mechanism; the rear end of the feeding push rod is fixed on the pushing frame, and the front end of the feeding push rod is movably supported on a supporting guide hole arranged on the guide frame; the interval maintaining mechanism comprises a pull rod arranged between the guide frame and the pushing frame, a supporting roller fixed on the end part of the feeding bracket adjacent to the clamping machine head, a traction rope straddling the supporting roller, and a suspended balancing weight; one end of the traction rope is fixed on the guide frame, and the other end is fixed on the suspended balancing weight; the front end part of the pull rod is fixed on the guide frame or can relatively movably pass through a through hole arranged on the guide frame and then is fixedly connected with the front stop piece; the front stop piece is used for stopping the pull rod from moving backwards relative to the guide frame; the rear end part of the pull rod can relatively move to pass through a through hole arranged on the pushing frame and then is fixedly connected with the rear stop piece; the back stop piece is used for stopping the pull rod from moving forwards relative to the pushing frame. Through setting up leading truck, pushing away work or material rest and interval hold mechanism to can utilize the interval arrangement between leading truck and the pushing away work or material rest to provide the support for pushing away material pole and tube blank in the in-process that the material loading was fed, and reduce the interval between the two in the back end of the material loading stroke so that the material loading push rod can get into in the feed through hole better, not only can shorten the required length of material loading push rod as far as possible, and reduce the waste of tube blank. In addition, the function of the interval maintaining mechanism can be well realized by utilizing the cooperation among the pull rod, the traction rope, the supporting roller and the suspended balancing weight, and the preset interval between the two frames can be adjusted by adjusting the position of the stop piece on the pull rod.
Another preferable scheme is that the control device of the spinning machine comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the step of any pipe spinning method can be realized; the frame is provided with a discharging device; the discharging device comprises a discharging hook which is positioned at one side of the clamping machine head, which is away from the tail feeding device, and a travelling mechanism which is used for driving the discharging hook to move in a three-dimensional space relative to the clamping machine head; the unloading hook is provided with a pipe hanging rod section which points to the clamping machine head and is obliquely arranged upwards; the discharging device comprises a discharging chute arranged on the frame and a discharging stop piece positioned right above a feed inlet of the discharging chute, wherein the discharging stop piece is provided with a stop plate part extending towards the direction pointing to the rotation axis. Based on the unloading device, the unloading hook is utilized to carry out carrying in the process that the cutting device cuts off the formed part from the pipe blank, deformation caused by direct falling of the formed part is avoided, and the arrangement of unloading equipment below the clamping machine head to optimize the overall structure is avoided. In addition, the unloading hooks are adopted to construct the receiving device of the molded part in the cutting process, and no additional acting force is applied to the molded part in the cutting process so as to reduce the cutting strain.
Drawings
Fig. 1 is a perspective view of embodiment 1 of the spinning machine of the present invention;
fig. 2 is a perspective view of embodiment 1 of the spinning machine of the present invention, with the protective cover omitted;
fig. 3 is a front view of embodiment 1 of the spinning machine of the present invention, with the protective cover omitted;
fig. 4 is a perspective view of a tail feeding device in embodiment 1 of the spinning machine according to the present invention;
FIG. 5 is an enlarged view of part of A in FIG. 4;
fig. 6 is a perspective view of embodiment 1 of the spinning machine of the present invention after omitting the tail feeding device;
FIG. 7 is an enlarged view of part of B in FIG. 6;
FIG. 8 is an enlarged view of part of C in FIG. 6;
fig. 9 is a partial perspective view of the tail loading device in embodiment 1 of the spinning machine according to the present invention;
FIG. 10 is an enlarged view of part of D of FIG. 9;
fig. 11 is a perspective view of embodiment 1 of the spinning machine according to the present invention, after omitting the tail feeding device;
fig. 12 is a partial perspective view of embodiment 1 of the spinning machine of the present invention, with the protective cover omitted;
FIG. 13 is a schematic view showing a process of performing an internal Zhou Yu cutting process on a molded tube portion according to example 1 of the present invention;
fig. 14 is a schematic view showing a process of spin forming a tube blank according to example 1 of the spinning machine of the present invention;
fig. 15 is a schematic view showing a process of performing end face flattening treatment on a molded tube part by using the spinning machine of example 1 of the present invention;
FIG. 16 is a schematic view showing a process of performing an inner hole finishing treatment on a formed pipe portion using example 1 of the spinning machine of the present invention;
FIG. 17 is an enlarged view of part of E in FIG. 11;
fig. 18 is a perspective view of a discharge device in embodiment 1 of the spinning machine of the present invention;
fig. 19 is a schematic diagram of a process for forming a tube blank by using the spinning machine of example 1 of the present invention, wherein fig. (a) is a schematic diagram of a process of an inner Zhou Yu cutting step, fig. b is a schematic diagram of a process of a spinning forming step, fig. c is a schematic diagram of a process of an end face flattening step, and fig. d is a schematic diagram of a process of a peripheral cutting step;
fig. 20 is a flowchart of a process for processing a tube blank using the spinning machine of example 1 of the present invention;
fig. 21 is a view showing a structure of a guide mounting in embodiment 1 of the present invention.
Detailed Description
The invention is further described below with reference to examples and figures thereof.
Spinning machine example 1
Referring to fig. 1 to 21, the spinning machine 1 of the present invention comprises a frame 10, a control device, a clamping head 11, a spinning head 12, a tail feeding device 13, a discharging device 14, a cutting device, a pipe end truing device and a protective cover 15; the protection cover 15 is installed on the frame 10 and covers the spinning machine head 12, the cutting device and the pipe end trimming device, and the feeding end of the discharging unit 14 and the front end of the clamping machine head 11 are also arranged in the protection cover 15 to ensure the safety of the processing process, the protection cover 15 is provided with a horizontal pull type door 150, an observation through hole is arranged on the horizontal pull type door 150, and a transparent partition plate is arranged on the observation through hole. The frame 10 is fixedly provided with a base 101, the spinning machine head 12 and the clamping machine head 11 are both arranged on the base 101, the spinning machine head 12 is positioned at the front side of the clamping machine head 11, and the tail feeding device 13 is positioned at one side of the clamping machine head 11, which is away from the spinning machine head 12, namely at the tail side of the clamping machine head 11.
In this embodiment, the control device includes a touch control board 16, a control cabinet 17, a processor, and a memory, where the memory stores a computer program; the touch control panel 16 receives control instructions from an operator to cause the processor to execute corresponding computer programs stored in the memory, and to control the respective functional units to perform responsive actions in a predetermined order to perform spinning, cutting and blanking operations to obtain molded parts of desired shapes.
The gripping head 11 includes a rotary main shaft 110 rotatably mounted on a rear end portion of the base 101 about the rotation axis 100, and a gripping claw 111 mounted on a front end portion of the rotary main shaft 110 for gripping the pipe 01; the clamping claw 111 is used for clamping the front end of the tube blank 01 so as to drive the tube blank 01 to synchronously rotate, and the specific structure is not limited to the multi-flap structure in the figure, and can be designed with reference to other structures in the existing products.
The spinning head 12, the cutting device and the pipe end finishing device are all mounted on the front end of the base 101, and during the spinning process, the rotary main shaft 110 is driven to rotate around the rotary axis 100 relative to the clamping head 12 by a rotary driving motor mounted on the base 101, so as to drive the pipe blank 01 clamped on the clamping claw 111 and the spinning wheel 120 on the spinning head 12 to rotate relatively, and in the description of the embodiment, the rotary axis 100 is arranged along the X-axis direction, and the vertical direction is the Z-axis direction. In order to realize that the tail feeding device 13 can feed materials from the tail side, as shown in the structures of fig. 2, 6, 17 and 21, a feeding through hole 1100 penetrating the front end and the rear end of the rotating main shaft 110 is arranged on the rotating main shaft 110; the specific installation structure is that two ends of the rotary main shaft 110 are rotatably supported on the frame through bearings, and the rotary main shaft 110 is driven to rotate around the rotation axis 100 relative to the frame 10 through gears or synchronous pulleys sleeved outside the rotary main shaft 110; the axial direction of the rotary spindle 110 is arranged in the X-axis direction, and its feed throughbore 1100 is also arranged in the X-axis direction, i.e. the clamping head 11 has a feed throughbore 1100 arranged in the direction of extension of the rotation axis 100, in this embodiment the feed throughbore 1100 is a substantially circular throughbore, the axis of which is arranged substantially in line with the rotation axis 100.
As shown in fig. 11 and 12, the spinning head 12 includes a spinning wheel 120, a mounting slide plate 21, and a feeding traveling mechanism 3, wherein the mounting slide plate 21 is a plate body structure arranged along the XOY plane, that is, along the horizontal plane, and the spinning wheel 120 is rotatably mounted on the mounting slide plate 21 through a mounting seat 121; the feed traveling mechanism 3 includes an X-axis slide plate 31 slidably mounted on the base 101 in the X-axis direction by a rail slide plate mechanism 30, a linear displacement output device 32 for driving the X-axis slide plate 31 to reciprocate in the X-axis direction, a rail slide plate mechanism 33 for mounting the mounting slide plate 21 to reciprocate in the Y-axis direction on the X-axis slide plate 31, and a linear displacement output device 34 for driving the mounting slide plate 21 to reciprocate in the Y-axis direction, and for the linear displacement output devices 32, 34, a linear motor, a servo motor, an oil cylinder, an air cylinder, or the like may be employed, and in this embodiment, a linear displacement output device constructed by cooperation of a servo motor and a screw nut mechanism is specifically employed to drive the mounting slide plate 21 to make a two-dimensional space movement in the XOY plane. Of course, the movement in three-dimensional space can be realized by adding a driving mechanism along the Z-axis. That is, in the present embodiment, the feed traveling mechanism 3 can be used at least for driving the mounting slide plate 21 to move in a two-dimensional space along the extending direction of the rotation axis 100 and in a lateral direction perpendicular to the extending direction. The feeding travelling mechanism 3 is used for driving the rotary pressing wheel 120 to act relative to the clamping claw 111 according to a preset track according to requirements, so that a formed pipe part with a preset shape is screwed out on the end part of the pipe blank 01.
The cutting device includes a cutting tool, a mounting slide 21 and a feeding travel mechanism 3, i.e., in this embodiment, the cutting device shares a set of feeding drive mechanism with the spinning head 12. As shown in fig. 12 to 17, the cutoff tool includes an outer peripheral cutoff tool 22 and an inner Zhou Yu cutoff tool 23, the outer peripheral cutoff tool 22 is detachably mounted on the mounting slide plate 21 through a tool holder 24, the outer peripheral cutoff tool 22 is detachably mounted on the tool holder 24 specifically through a tool shank 220 arranged in the Y-axis direction, and in this embodiment, the tool holder 24 is directly fixed on the mounting slide plate 21 by a fixing bolt; the inner Zhou Yu cutting tool 23 is detachably mounted on the mounting slide plate 21 through the tool holder 25, the inner Zhou Yu cutting tool 23 is detachably mounted on the tool holder 25 specifically through a rod-shaped tool holder 230 which is arranged along the X-axis and extends toward the direction of the linear clamping jaw 111, in this embodiment, the tool holder 25 is slidably mounted on the mounting slide plate 21 along the X-axis through the guide rail mechanism 250, and an axial feeding driving mechanism 251 is mounted on the mounting slide plate 21 for driving the tool holder 25 to reciprocate along the guide rail slider mechanism 250 along the X-axis, and driving the inner Zhou Yu cutting tool 23 to reciprocate along the X-axis relative to the mounting slide plate 21 to adjust the position of the inner Zhou Yu cutting tool 23 to the mounting slide plate 21, and avoid the machining process of the spinning wheel 120, the outer peripheral cutting tool 22 and the inner hole cutting tool 26, and simultaneously, the pre-cutting position of the inner Zhou Yu cutting tool 23 relative to the inner peripheral surface of the pipe blank 01 is controlled by the feeding driving of the feeding travelling mechanism 3 along the X-axis, so that the length of the spinning piece 02 can be adjusted, and the machining process of other spinning tools and the wheel 120 can be better avoided. For the structure of the feeding driving mechanism 251, a linear motor, an oil cylinder, an air cylinder or a linear displacement output device constructed by matching a servo motor with a screw-nut mechanism can be adopted, in this embodiment, the air cylinder is adopted to drive, so as to realize the back-and-forth switching of the inner Zhou Yu cutter 23 relative to the mounting sliding plate 21 between the retracted avoiding position and the extended processing position, and the feeding precision of the feeding travelling mechanism 3 is utilized to adjust the position of the cutter relative to the pipe blank 01, so that the manufacturing cost of the equipment is reduced on the premise of ensuring the processing precision.
The pipe end truing apparatus includes a pipe end truing tool, a mounting slide 21, and a feed travelling mechanism 3, i.e., in this embodiment, the pipe end truing apparatus shares a set of feed drive mechanisms with the spinning head 12. As shown in fig. 12 to 17, the pipe end truing tool includes a peripheral cutting tool 22 and a turning hole tool 26, i.e., it shares a peripheral cutting tool 22 with the cutting device; of course, an outer Zhou Qieduan cutter can be independently arranged according to actual needs; the turning inner hole cutter 26 is detachably mounted on the mounting slide plate 21 through a cutter holder 27, and the turning inner hole cutter 26 is detachably mounted on the cutter holder 27 through a rod-shaped cutter handle 260 arranged along the X-axis and extending in the direction of the linear clamping jaw 111.
The outer peripheral cutting tool 22, the inner hole turning tool 26, the inner Zhou Yu cutting tool 23 and the spinning wheel 120 are sequentially arranged at intervals along the transverse direction, namely along the Y axis, and machining avoiding gaps are reserved between the outer peripheral cutting tool 22, the inner hole turning tool 26, the inner Zhou Yu cutting tool 23 and the spinning wheel 120, namely, in the process of machining the tube blank 01 clamped on the clamping claw 111 by using one of the outer peripheral cutting tools, the inner hole turning tool 26, the inner Zhou Yu cutting tool 23 and the spinning wheel, the distance between the outer peripheral cutting tool and the spinning wheel can be ensured not to interfere with the machining process, and the specific distance is determined according to the actual tool size and the size of the tube blank to be machined; the positional relationship between the four may be arranged according to the front and rear needs of the processing process, and is not limited to the specific structure in the present embodiment. The inner Zhou Yu cutting tool 23 has a triangular cutting edge, and is configured to form a chamfer of the inner edge of the end face of the forming member 02 by machining a triangular cross section groove in the inner peripheral surface of the tube blank 01, and of course, the inner Zhou Yu cutting tool may have a rectangular cutting edge to machine a rectangular cross section groove, or may have an indent arc surface to machine an indent convex edge chamfer surface, and the specific structure is selected according to actual needs.
In the present embodiment, the spinning head 12, the cutting device and the pipe end truing device share a set of feeding driving mechanism, which not only reduces the construction of parts but also facilitates the setting of the machining avoiding pitch. Of course, the three may be separately provided with the corresponding feeding driving mechanism, and the arrangement of the specific structure is not limited to the specific structure in the present embodiment.
As shown in fig. 7 and 18, the discharge device 14 is detachably mounted on the side of the base 101 by a bracket 41. The device specifically comprises a discharging hook 42 positioned on one side of the clamping machine head 11 away from the tail feeding device 13, namely positioned on the front side of the clamping machine head 11, a travelling mechanism for driving the discharging hook 42 to move in a three-dimensional space relative to the clamping machine head 11, a discharging chute 48 which is arranged on the bracket 41 and is obliquely downwards arranged, and a discharging stop piece 47 for assisting the discharging hook 42 to unhook and discharge a formed part hung on the discharging hook; the discharge hook 42 is an L-shaped rod structure having a pipe hanging rod section 420 directed toward the head 11 and disposed obliquely upward and a mounting rod section 421 disposed vertically.
As for the specific structure of the traveling mechanism, a manipulator having degrees of freedom of XYZ three axes or more may be employed for construction, and in this embodiment, a traveling truss structure is employed, which includes a traversing carriage 44 slidably mounted on the carriage 41 by a rail-slider mechanism 43 arranged in the Y-axis direction, a cylinder 48 for driving the traversing carriage 44 to reciprocate in the Y-axis direction with respect to the carriage 41, and a cylinder 46 slidably mounted on the traversing carriage 44 by a rail-slider mechanism 45 arranged in the X-axis direction, a cylinder 49 for driving the cylinder 46 to reciprocate in the X-axis direction, a piston rod 460 of the cylinder 46 is arranged in the Z-axis direction, and the unloading hook 42 is detachably fixed to a lower end portion of the piston rod 460, as shown in fig. 7 and 18.
The stripping stop 47 is located directly above the inlet of the discharge chute 48, i.e. directly above the upper port of the discharge chute 48, and has a stop plate portion 470 which is arranged extending in a direction pointing towards the rotation axis 100.
As shown in the structure of fig. 1 to 5, the tail feeding device 13 includes a feeding bracket 50, a guide frame 6 and a pushing frame 7 slidably mounted on the feeding bracket 50 in the X-axis direction by two guide rail slider mechanisms 51 arranged in the X-axis direction, a linear displacement output device 52 for driving the pushing frame 7 to reciprocate in the X-axis direction, a pitch maintaining mechanism, and a feeding push rod 53; wherein the pushing frame 7 is positioned at the tail side of the guide frame 6. As shown in fig. 1 and 5, the feeding bracket 50 comprises two lifting supporting seats 501, a transverse supporting frame 502 supportingly fixed on the upper ends of the two supporting seats 501, side blocking frames 503 positioned on two sides of the transverse supporting frame 502, and a top cover plate 504 detachably buckled on the two side blocking frames 503; the top cover plate 504 is detachably fixed to the side frames 503 by a snap mechanism 505, and a plurality of attachment/detachment auxiliary handles 505 are provided on the top cover plate 504; the two side baffle frames 503 and the top cover plate 504 are enclosed and mounted on the transverse support frame 502 to form a protective cover which is arranged outside the guide frame 6 and the pushing frame 7 along the axial extension of the feeding push rod 53 and is used for isolating the guide frame 6 and the pushing frame 7 from outside operators in the feeding process so as to avoid safety accidents; the two guide rail slide block mechanisms 51 are fixedly arranged on the transverse supporting frame 502; the support end of the support seat 501 is opposite to the base, and the position of the support seat in the Z-axis direction is adjustable, specifically, the support seat comprises a sleeve structure and a set screw for locking the relative displacement between the two sleeves. For the specific structure of the linear displacement output device 52, a rack-and-pinion transmission mechanism, a belt transmission mechanism or a chain transmission mechanism is adopted, in this embodiment, the linear displacement output device is constructed by adopting the chain transmission mechanism, as shown in fig. 4, and comprises chain wheels 507 rotatably fixed on two end parts of the feeding bracket 50, a chain 508 meshed with the two chain wheels 507, and a servo motor for driving one chain wheel 507 to rotate or another chain wheel meshed with the chain 508 to drive the chain wheel 508 to rotate, and a sliding plate 70 on the pushing frame 7 is fixedly connected with the upper surface of a part of the chain body of the chain 508, so that the pushing frame 7 can be driven to reciprocate along the guide rail sliding block mechanism 51 in the X axis direction, and the size of the tail feeding device 13 in the X axis direction can be shortened to reduce the occupied area of the tail feeding device.
The pushing frame 7 comprises a sliding plate 70 fixedly arranged on part of sliding blocks of the two guide rail sliding block mechanisms 51 and an L-shaped fixing plate 71 arranged on the sliding plate 70; the L-shaped fixing plate 71 is provided with a mounting hole 72 that can be fitted over the tail end portion of the loading push rod 53. The guide frame 6 comprises a sliding plate 60 fixedly arranged on part of sliding blocks of the two guide rail sliding block mechanisms 51 and a guide plate 61 arranged on the sliding plate 60, and the guide plate 61 is provided with a support guide hole 62 movably sleeved outside the feeding push rod 53; the rear end of the loading push rod 53 is fixedly connected with the L-shaped fixing plate 71 by the fixing nut 73, and the front end portion passes through the supporting guide hole 62 to be slidably supported on the supporting guide hole 62, so that the loading push rod 53 is slidably mounted on the loading bracket 50; wherein, the pushing frame 7 and the guiding frame 6 together form a feeding driving unit in this embodiment, and the feeding driving unit is used for driving the feeding push rod 53 to feed along the X-axis.
The interval maintaining mechanism comprises two pull rods 54 arranged between the guide frame 6 and the pushing frame 7, a supporting roller 80 fixed on the end part of the feeding bracket 50 adjacent to the clamping machine head 11, a traction rope 81 straddling the supporting roller 80, a large-diameter roller 82 fixed on the bottom of the feeding bracket 50 and having a diameter larger than that of the supporting roller 80, and a suspended balancing weight 83.
One end of the traction rope 81 is fixed on the sliding plate 60 of the guide frame 6, the other end sequentially enters from the upper side of the supporting roller 80 and straddles and winds on the supporting roller 80, and enters from the bottom side of the large-diameter roller 82 and straddles and winds on the large-diameter roller 82, and then is fixedly connected with the suspended balancing weight 83, so that in the use process, the suspended balancing weight 83 is utilized to apply a pulling force to the traction rope 81 along the vertical direction, and a pulling force along the positive direction of the X axis is applied to the sliding plate 60, so that when the sliding plate 60 is not subjected to an external stopping force or pulling force along the negative direction of the X axis, the guide frame 6 is driven to move along the positive direction of the X axis relative to the feeding bracket 50, namely, to move towards the direction close to the clamping machine head 11; the front end of the pull rod 53 is fixed on the guide plate 61 of the guide frame 6, the rear end of the pull rod 53 relatively movably passes through the through hole on the guide hole seat 74 arranged on the pushing frame 7 and then is fixedly connected with the stop piece 75, namely, the stop piece 75 is fixed on one side of the L-shaped fixing plate 71, which is far away from the guide frame 6, in the use process, the stop piece 75 is used for abutting against the guide plate 61 on the pushing frame 6, and the relative movement between the pushing frame 7 and the pull rod 54 is stopped, namely, when the guide frame 6 is not constrained by external force such as a stop or pulling force along the X axis, the stop piece 75 always abuts against the L-shaped fixing plate 71 under the action of the pulling force of a suspended balancing weight, so that the distance between the guide frame 6 and the pushing frame 7 is kept to be a preset distance, thereby better supporting the feeding push rod 53 in the feeding process, namely, in the embodiment, the length of the feeding push rod 53 is longer than the preset distance, generally within twice the preset distance, and specifically, the length and weight of the tube blank 01 can be set according to the strength of the feeding push rod 53. That is, in the present embodiment, the interval maintaining mechanism is used to force the interval between the guide frame 6 and the pushing frame 7 to be a preset interval until the moving action of the guide frame 6 near the material clamping head is stopped, the stop is applied by a stop block provided on the front end portion of the material feeding bracket 50, in the present embodiment, a stop plate 500 fixed on the end of the guide rail as shown in fig. 4; of course, the preset distance can be adjusted by moving the fixed position of the stop piece on the pull rod so as to adapt to the feeding push rod 53 and the tube blank 01 with different lengths. The stop 75 constitutes a rear stop for stopping the forward movement of the pull rod 53 relative to the pusher carriage 7.
As shown in fig. 20, the process of obtaining the molded article by the present spinning machine includes a pipe end positioning step S1, an inner Zhou Yu cutting step S2, a spinning molding step S3, a port trimming step S4, an outer Zhou Caiduan step S5, and a discharging step S6, i.e., the processor executes a computer program in a memory to realize the above six steps to obtain the molded article 02 of a desired shape.
In the present embodiment, a specific spinning process will be exemplarily described taking a molded article 02 having a structure as shown in fig. 19 (d) as an example.
In the pipe end positioning step S1, the feeding travelling mechanism 3 is controlled to drive the spinning wheel 120 to move to a positioning position right in front of the clamping claw 111, and then the tail feeding device 13 is controlled to feed the pipe blank 01 until the front end surface of the pipe blank 01 abuts against the wheel end surface of the spinning wheel 120 so as to position the pipe end.
In the working process, the linear displacement output device 52 pulls the pushing frame 7 and the guide frame 6 to move along the X axis in the negative direction, the distance between the front end of the feeding push rod 53 and the tail end of the feeding push rod 53 is approximately larger than the length of the tube blank 01, as shown in fig. 21, the front end of the tube blank 01 passes through the supporting guide hole 910 in the guide piece 91 fixed on the tail end of the feeding push rod 1100 until part enters the feeding through hole 110, and the tail end of the tube blank 01 and the front end of the feeding push rod 53 are rotatably connected by using the connecting piece, in particular, the two are connected by adopting a sleeved structure; specifically, a pushing adapter is rotatably mounted at the front end of the feeding push rod 53, the external dimensions of the pushing adapter are the same as the external dimensions of the tube blank 01 and the external peripheral surface of the feeding push rod 53, the pushing adapter is provided with an inserting connector sleeved in the rear end port of the tube blank and a pushing shoulder table surface positioned at the rear end side of the inserting connector, and specifically, the pushing adapter can be arranged to be fixed to a fixed seat on the front end of the feeding push rod 53 and a pushing adapter rotatably mounted on the fixed seat, and specifically, the pushing adapter rotatably connects the two through a bearing axially arranged along the axial direction of the feeding push rod. Thereby supporting the tube blank 01 suspended by the guide frame 6 and the guide piece 91, driving the pushing frame 7 to move forward towards the X-axis by the linear displacement output device 52, driving the feeding push rod 53 to drive the front end part of the tube blank to sequentially pass through the feeding through hole, the clamping station of the clamping claw 111 and extend to the front end surface to abut against the wheel end surface of the rotating wheel 120, thereby completing the positioning of the front end surface of the tube blank. In addition, a detection loop can be constructed between the tube blank 01 and the spinning wheel 120, if the detection loop is on, the detection loop indicates that the tube blank and the spinning wheel are abutted, and if the detection loop is off, the detection loop indicates that the tube blank and the spinning wheel are not abutted.
That is, in this embodiment, the tail feeding device is used to supply the tube blank 01 from the tail side to the clamping claw 111 and the spinning wheel 120 through the feeding through hole 100, and the tube blank 01 is a long tube blank, that is, the length of the tube blank is enough to ensure that more than two spinning parts can be spun, specifically, more than twice the length of the feeding through hole 1100, wherein the length of the feeding push rod 53 is greater than the length of the feeding through hole 1100, so that the tube blank 01 with a short residual length after multiple cutting can be fed. The movable stroke of the feeding push rod 53 on the feeding bracket 50 is equal to or more than twice the length of the feeding through hole 1100, specifically, more than 5 times, preferably, 5 to 10 times.
The mounting position of the guide 91 may be set according to practical situations, for example, may be fixed in the feeding through hole 1100 or located at the tail side of the feeding through hole 1100, and preferably the guide 91 rotates along with the rotating main shaft 110, so as to reduce scratches on the surface of the pipe blank 01. The support guide hole 910 on the guide member 91 is used for guiding and supporting the pipe blank 01 in the early stage of feeding and guiding and supporting the feeding push rod 53 in the later stage of feeding.
Step S2, the inner Zhou Yu is cut, and the feeding travelling mechanism 3 is controlled to drive the rotary wheel 120 to exit from the positioning position; next, as shown in fig. 13 and 19 (a), the cooperation of the feeding traveling mechanism drive 3 and the axial feeding driving mechanism 251 is controlled according to the length of the molded article 02 to be obtained, so that the inner Zhou Yu cutter 23 extends into the front end portion of the pipe blank 01; then, the rotary driving device is controlled to drive the rotary main shaft 110 to rotate the tube blank 01, and the feeding traveling mechanism 3 is controlled to drive the inner Zhou Yu cutter 23 to pre-cut the section groove 010 on the inner peripheral surface of the tube blank 01.
For the groove depth control of the end face groove 010, it is generally determined according to the wall thickness of the pipe blank 01, and the cutting depth is generally one third or more and one half or less, and is 0.2 mm to 0.5 mm in this embodiment.
A spinning forming step S3, wherein the feeding travelling mechanism 3 is controlled to drive the inner Zhou Yu cutting tool 23 to exit from the pre-cutting position; then, the rotary driving device is controlled to drive the rotary main shaft 110 to rotate the tube blank 01, and the feeding traveling mechanism 3 is controlled to drive the spinning roller 120 to move along a predetermined trajectory to spin a molded tube portion of a predetermined shape at the front end portion of the tube blank 01.
As shown in fig. 14 and 19 (b), the tip end portion of the tube blank 01 in a high-speed rotation state is pressed by the spin wheel 120, and the molded tube portion 02 is rotated.
A port trimming step S4, wherein the spinning wheel 120 is controlled to exit the spinning position; then, the rotary driving device is controlled to drive the rotary main shaft 110 to rotate to drive the pipe blank 01, the feeding traveling mechanism 3 is controlled to drive the peripheral cutting tool 22 to feed to the end side of the forming member 02 so as to perform end face flattening treatment on the necking part of the forming pipe part, and the inner hole turning tool 26 is driven to extend into the forming member 02 so as to perform inner hole trimming treatment on the necking part of the forming pipe part.
In the process of spinning the pipe blank 01 into the molded article 02, the end face is easily uneven and the surface of the inner hole is uneven, which affects the subsequent assembly, so as shown in fig. 16, the roundness of the inner peripheral surface is improved by feeding the inner hole turning tool 26 in the transverse direction while driving the pipe blank 01 to rotate based on the rotating main shaft 110; as shown in fig. 15 and 19 (c), the end face of the molded article 02 is cut by the outer peripheral cutting tool 22.
An outer Zhou Caiduan step S5, wherein the feeding travelling mechanism 3 is controlled to drive the pipe end trimming cutter to exit from the trimming position; next, as shown in fig. 19 (d), the rotary driving device is controlled to drive the rotary spindle 110 to rotate the tube blank, and the feed traveling mechanism 3 is controlled to drive the outer peripheral cutting tool 22 to cut the tube blank 01 at a position on the outer peripheral surface thereof corresponding to the cross-section groove 010, to obtain the molded article 02.
That is, in this embodiment, the cutting device is located at the front side of the feed through hole, and includes a cutting tool located beside the spinning roller for cutting the spun formed article 02 from the tube blank 01. As shown in fig. 2 and 3, before cutting, the control traveling mechanism drives the pipe hanging rod section 420 of the discharge hook 42 to extend into the inner hole of the forming member 02 with a gap between the inner peripheral surface of the forming member and the pipe hanging rod section 420, and when the forming member 02 is cut from the pipe blank 01, the pipe hanging rod section 420 is automatically hung as shown in fig. 18.
And S6, controlling a travelling mechanism to drive the discharging hook 42 to move to the side of the discharging stop piece 47 along with the forming piece 02, wherein the forming piece 02 and the mounting rod section 421 are respectively positioned on one side of the stop plate section 470, the lower edge of the end side of the forming piece 02 adjacent to the stop plate section 470 is positioned below the upper side of the stop plate section 470, driving the discharging hook 42 to move forward along the X axis by using the travelling mechanism, and under the stop of the stop plate section 470, the forming piece 02 is separated from the pipe hanging rod section 420 to fall into the discharging chute 48 and roll into the collecting frame along the obliquely arranged groove surface, namely, the stop plate section 470 is used for pushing the tubular forming piece 02 hung on the discharging hook 42 from the discharging hook 42 when the discharging hook 42 moves relative to the stop plate section 470 along the direction perpendicular to the plate surface of the stop plate section 470.
The six steps are repeated to continuously process the front end part of the pipe blank 01 into a formed part 02 with a desired shape until the rest pipe length cannot be processed into one formed part and a length position with enough clamping, compared with the condition of pre-cutting in the prior art, the last wasted clamping pipe length is common to all formed parts, the pipe blank is saved, the waste is reduced, and all the working procedures provide the processing precision of the whole formed part 02 based on one clamping and positioning.
Spinning machine example 2
As an explanation of embodiment 2 of the spinning machine of the present invention, only the differences from embodiment 1 of the spinning machine described above will be explained.
The specific structure of the space holding mechanism is not limited to the passive structure in the above embodiment, but may be an active structure, i.e. a structure constructed by using a linear displacement output device controlled by a control device, for example, a linear motor or a rotating motor and a screw-nut mechanism, and referring to the structure shown in fig. 4 and 5, one of a stator and a mover of the linear displacement output device is fixed on the guide frame 6, the other is fixed on the pushing frame 7, and a travel switch is fixed on the front end side of the guide frame 6 to touch a stop piece mounted on the front end of the feeding frame 5, or a travel switch is fixed on the front end gate of the feeding frame 5 to characterize that the guide frame 6 is stopped at the position when the guide frame 6 triggers the travel switch, for example, a rotating motor and a screw-nut mechanism are used to control the rotating motor to drive the screw-nut mechanism to keep the space between the screw-nut mechanism and the pushing frame 7 to shorten the speed of advancing after the travel switch is triggered; in addition, the sleeve structure can be arranged, the sleeve structure comprises a long inner sleeve and a short outer sleeve which can be sleeved in a sliding manner, locking holes are formed in the positions, corresponding to the long inner sleeve and the short outer sleeve, of the long inner sleeve, a locking mechanism, particularly an electromagnet, is arranged on the short outer sleeve, when the electromagnet is electrified, locking pins penetrating through the two locking holes are sucked out to enable the two sleeves to slide relatively, the long inner sleeve can partially extend out of the two ends of the short outer sleeve in the use process, when the electromagnet is not electrified, the locking pins extend into the two locking holes aligned under the action of a reset spring to fix the relative positions between the two sleeves, and the long inner sleeve can be provided with a plurality of locking holes to realize the selection of preset intervals. That is, in this embodiment, the interval maintaining mechanism is used to force the interval between the guide frame and the pushing frame to be greater than the preset interval until the guide frame approaches the clamping head to move to be stopped.
In the above embodiment, the motor is used to construct the rotation driving device to drive the material clamping head and the spinning head to rotate around the rotation axis 100, specifically drive the rotation main shaft to rotate around the rotation axis 100 relative to the frame. Of course, other rotary output devices may be used to construct the rotary driving device, for example, a rotary displacement output device constructed by a conversion mechanism for converting a linear displacement into a rotary displacement, such as a linear displacement output device of an oil cylinder, an air cylinder, or the like, and a rack-and-pinion mechanism, which is driven by a synchronous belt, a gear transmission mechanism, or the like, to construct the rotary driving device in the above embodiment. Wherein. The "trailing side" is configured as the side of the clamping head facing away from the spinning head and the "leading side" is configured as the side of the clamping head adjacent to the spinning head. In addition, the rear end part of the feeding push rod is rotatably arranged on the pushing frame through a bearing, so that the relative rotation between the front end part of the feeding push rod and the tube blank material is reduced, or the feeding push rod and the tube blank material are not rotated but can be directly and detachably sleeved and fixedly connected.
In the above embodiment, the cutting device and the pipe end trimming device are both realized by using the rotating spindle to drive the pipe blank to rotate through the clamping claw, namely, in the above embodiment, the cutting device comprises the rotating spindle, the clamping claw mounted on the front end part of the rotating spindle, the rotating driving device for driving the rotating spindle to rotate, the outer Zhou Qieduan cutter, the inner Zhou Yu cutter and the cutter feeding and traveling mechanism, and the pipe end trimming device comprises the rotating spindle, the clamping claw mounted on the front end part of the rotating spindle, the rotating driving device for driving the rotating spindle to rotate, the outer Zhou Qieduan cutter, the inner hole cutter and the cutter feeding and traveling mechanism. In addition, the connection mode between the pull rod arranged between the pushing frame and the guide frame and the pull rod arranged between the pushing frame and the guide frame can be set to realize the function of keeping the distance, namely, the front end part of the pull rod can relatively move to pass through the through hole arranged on the guide frame and then is fixedly connected with the front stop piece, and the front stop piece is used for stopping the pull rod to move backwards relative to the guide frame.
Pipe spinning method embodiment
In the description of the above spinning machine embodiment, the pipe spinning method of the present invention has been described, and will not be repeated herein, and the above spinning machine embodiment is a spinning machine in which a part may be adapted to use the pipe spinning method, and is not a spinning machine of all structures.
The main conception of the invention is that the cutting step in the existing pipe spinning method is divided into an inner peripheral surface pre-cutting step and an outer Zhou Caiduan step, so that the subsequent processing procedures of the formed part are reduced. The specific structure of the spinning machine is not limited to the above embodiments according to the present concept, and various obvious variations are possible.

Claims (12)

1. The spinning method for the pipe fitting is characterized by sequentially comprising the following steps of:
an inner Zhou Yu cutting step of precutting an annular cross-section groove on an inner peripheral surface of a front end portion of a tube blank, the annular cross-section groove being arranged coaxially with the front end portion, in accordance with a length of a target formed piece;
a spin forming step of spin forming a molded tube portion of a predetermined shape on the front end portion;
and an outer Zhou Caiduan step of cutting the front end portion inward at a position corresponding to the annular cross-section groove on the outer peripheral surface of the front end portion based on the clamping and positioning in the spin forming step, thereby obtaining a molded article.
2. The pipe spinning method according to claim 1, wherein:
the groove side wall surface of the annular section groove facing the forming pipe part forms a chamfer surface of the inner edge of the end surface of the forming piece.
3. The pipe spinning method according to claim 1, wherein in the inner Zhou Yu cutting step:
the groove depth of the annular section groove is less than or equal to one half of the thickness of the tube blank; the groove depth of the annular section groove is more than or equal to one third of the thickness of the pipe blank.
4. A pipe spinning method according to claim 3, wherein:
the groove side wall surface of the annular section groove facing the forming pipe part forms a chamfer surface of the inner edge of the end surface of the forming piece.
5. A pipe spinning method according to any one of claims 1 to 4, wherein after the spinning forming step, a pipe end truing step is performed:
and (3) performing end face flattening treatment on at least the necking part of the forming pipe part and/or performing inner hole trimming treatment on the necking part.
6. A pipe spinning method according to any one of claims 1 to 4, wherein:
in the process of obtaining the formed part, clamping the tube blank only once by using a clamping claw arranged on the front end part of the rotary main shaft; in the process, the rotation main shaft is only used for driving the tube blank to rotate around a rotation axis through the clamping claw; and a feeding through hole is formed in the rotary main shaft, and the tube blank material stretches into the feeding through hole from the tail side of the feeding through hole to be fed from the tail side.
7. The spinning machine with the improved structure comprises a frame, a spinning machine head and a material clamping machine head, wherein the spinning machine head and the material clamping machine head are arranged on the frame and driven by a rotary driving device to rotate relatively around a rotary axis; the spinning machine head comprises a spinning wheel, a mounting sliding plate and a feeding travelling mechanism, wherein the feeding travelling mechanism at least can be used for driving the mounting sliding plate to move along the extending direction of the rotating axis and the transverse two-dimensional space perpendicular to the extending direction, and the material clamping machine head comprises a rotating main shaft and a material clamping claw arranged on the front end part of the rotating main shaft;
the method is characterized in that:
the spinning machine comprises a cutting device positioned at the front side of the material clamping machine head; the cutting device comprises an outer Zhou Qieduan cutter and an inner Zhou Yuqie cutter; the outer peripheral cutting tool is arranged on the mounting sliding plate through a first tool holder, and the inner Zhou Yu cutting tool is arranged on the mounting sliding plate through a second tool holder; the spinning wheel, the outer Zhou Qieduan cutter and the inner Zhou Yu cutter are distributed at intervals in the transverse direction, and machining avoiding intervals are reserved among the spinning wheel, the outer Zhou Qieduan cutter and the inner Zhou Yu cutter;
the second tool apron is slidably mounted on the mounting slide plate, and an axial feeding driving mechanism for driving the second tool apron to reciprocate along the extending direction is mounted on the mounting slide plate.
8. The spinning machine of claim 7, wherein:
the rotary main shaft is provided with a feeding through hole arranged along the extending direction, and the spinning machine comprises a tail feeding device positioned at the tail side of the feeding through hole;
the tail feeding device comprises a feeding bracket, a feeding push rod which is slidably arranged on the feeding bracket, and a feeding driving unit which is used for driving the feeding push rod to feed along the extending direction so as to feed; the length of the feeding push rod is longer than that of the feeding through hole; the movable travel of the feeding push rod on the feeding support is more than or equal to twice the length of the feeding through hole.
9. The spinning machine of claim 7, wherein:
the spinning machine comprises a pipe end trimming device, wherein the pipe end trimming device comprises an inner hole turning cutter, and the inner hole turning cutter is arranged on the installation sliding plate through a third cutter holder;
the spinning wheel, the outer Zhou Qieduan cutter, the inner Zhou Yu cutter and the inner hole turning cutter are distributed at intervals in the transverse direction, and machining avoiding intervals are reserved among the spinning wheel, the outer Zhou Qieduan cutter, the inner Zhou Yu cutter and the inner hole turning cutter.
10. The spinning machine of claim 9, wherein:
The rotary main shaft is provided with a feeding through hole arranged along the extending direction, and the spinning machine comprises a tail feeding device positioned at the tail side of the feeding through hole;
the tail feeding device comprises a feeding bracket, a feeding push rod which is slidably arranged on the feeding bracket, and a feeding driving unit which is used for driving the feeding push rod to feed along the extending direction so as to feed; the length of the feeding push rod is longer than that of the feeding through hole; the movable travel of the feeding push rod on the feeding support is more than or equal to twice the length of the feeding through hole.
11. The spinning machine of claim 10, wherein:
the feeding driving unit comprises a guide frame slidably arranged on the feeding bracket, a pushing frame positioned at the tail side of the guide frame, a linear displacement output device for driving the pushing frame to move along the extending direction, and a distance keeping mechanism; the rear end of the feeding push rod is fixed on the pushing frame, and the front end of the feeding push rod is movably supported on a supporting guide hole arranged on the guide frame;
the interval maintaining mechanism comprises a pull rod arranged between the guide frame and the pushing frame, a supporting roller fixed on the end part of the feeding bracket adjacent to the clamping machine head, a traction rope straddling the supporting roller, and a suspended balancing weight; one end of the traction rope is fixed on the guide frame, and the other end of the traction rope is fixed on the suspended balancing weight;
The front end part of the pull rod is fixed on the guide frame or can relatively movably pass through a through hole arranged on the guide frame and then is fixedly connected with the front stop piece; the front stop piece is used for stopping the pull rod from moving backwards relative to the guide frame; the rear end part of the pull rod can relatively move to pass through a through hole arranged on the pushing frame and then is fixedly connected with the rear stop piece; the rear stop piece is used for stopping the pull rod from moving forwards relative to the pushing frame.
12. The spinning machine according to any one of claims 7 to 11, wherein:
the control device of the spinning machine comprises a processor and a memory, wherein the memory stores a computer program which can realize the steps of the pipe spinning method according to any one of claims 1 to 3 when being executed by the processor;
the frame is provided with a discharging device; the discharging device comprises a discharging hook and a travelling mechanism, wherein the discharging hook is positioned on one side of the clamping machine head adjacent to the spinning machine head, and the travelling mechanism is used for driving the discharging hook to move in a three-dimensional space relative to the clamping machine head; the unloading hook is provided with a pipe fitting hanging rod section which points to the clamping machine head and is obliquely arranged upwards; the discharging device comprises a discharging chute arranged on the frame and a discharging stop piece arranged right above a feeding hole of the discharging chute, wherein the discharging stop piece is provided with a stop plate part extending towards the direction of the rotation axis, and the discharging stop piece is used for pushing a tubular forming piece hung on the discharging hook off the discharging hook when the discharging hook moves relative to the stop plate part along the direction perpendicular to the plate surface of the stop plate part.
CN201811599122.1A 2018-12-26 2018-12-26 Spinning method for pipe fitting and spinning machine with improved structure Active CN109702067B (en)

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CN115283945B (en) * 2022-07-19 2024-04-09 陕西法士特齿轮有限责任公司 High-hardness synchronizer riveting locking pin and processing method thereof

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