CN113458219B

CN113458219B - Numerical control pipe bending equipment for inhibiting deformation and wrinkle resistance of bent pipe

Info

Publication number: CN113458219B
Application number: CN202110882187.2A
Authority: CN
Inventors: 林姚辰; 曾元松; 林伟明; 吴为; 吕凤工; 叶冬冬; 闫晶; 黄宏; 李康海; 林军凯
Original assignee: Zhejiang Kingmasun Intelligent Manufacturing Co ltd; AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Current assignee: Zhejiang King Mazon Machinery Co ltd; AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2023-03-07
Anticipated expiration: 2041-08-02
Also published as: CN113458219A

Abstract

The invention discloses a numerical control elbow device for inhibiting bending pipe from becoming elliptical and crease-resistant, which comprises a rack, and an automatic feeding and transferring device, an anti-crease mechanism, a supporting mechanism, a die clamping device and a die bending mechanism which are arranged on the rack, wherein a guide pipe is fed to positions among the anti-crease mechanism, the supporting mechanism, the die clamping device and the die bending mechanism by the automatic feeding and transferring device; a semicircular groove is formed in the right end face of each movable joint pressing block, and the semicircular grooves in the movable joint pressing blocks are matched to form a first semicircular groove; this technical scheme can form enough support to the lateral wall of pipe flexion, and then further reduce pipe flexion's ovality to can effectively avoid pipe flexion's lateral wall by tensile fracture.

Description

Numerical control pipe bending equipment for inhibiting deformation and wrinkle resistance of bent pipe

Technical Field

The invention relates to the technical field of pipe machining, in particular to numerical control pipe bending equipment for inhibiting deformation and wrinkle resistance of a bent pipe.

Background

Because the airplane and the rocket conduit bear important work such as fuel input, mechanism opening, pressure control, environment regulation and the like in preparation, if any part is damaged due to failure, a serious tragedy of 'airplane destruction and personal death' and 'rocket destruction and satellite death' of the airplane can be caused, and the important tragedy is directly related to the personal safety of passengers already owned by officers.

The aircraft and the rocket are provided with a plurality of metal hollow pipe components commonly called as 'conduits', the conduits are mainly used for transmitting various liquids and gases, supporting fuel oil, power and the like required by the flight of the aircraft and the rocket, completing various work tasks, and are very important parts on the aircraft and the rocket. Because the conduit has a hollow structure, and the aircraft and the rocket have strict requirements on the importance of each component, it can be said that the lighter the conduit is, the better the conduit is, the weight index of the conduit is usually measured by taking gram as a unit, and the importance of light weight to the aircraft and the rocket can be seen, so the wall of the conduit is usually very thin, which is usually called a thin-wall conduit, and the thin-wall conduit is more prone to defects such as ellipse, instability, wrinkling and the like in the bending process. The shape of the conduit is complex due to the limitation of the installation environment of the airplane and the rocket, and the bending part of a plurality of conduits has serious deformation due to small bending radius, is extremely easy to become oval and even unstably crinkle in the bending process, is a common technical problem in the conduit bending processing industry, and cannot be thoroughly solved so far.

In the early stage of the starting stage of an airplane and a rocket in China, because the manufacturing industry is weak in foundation, the roundness in the bending process is guaranteed by manually filling fine gravels, rosin and the like in a hollow pipe, but because the traditional manual process cannot meet the development requirements on the number of the airplane and the rocket, a hydraulic pipe bender and a numerical control pipe bender are gradually used for bending and processing a pipe along with the development of the industrial process, the bending part of the pipe is always in a semi-closed state in the bending process because of the structural characteristics of technological equipment in the bending process, the pipe is easy to deform in an aggravated manner under the bending condition, the bending roundness of the pipe is reduced into an ellipse (the common technical problem in the industry exists in the global range), and the instability and wrinkling technical defects in the bending process of the pipe are aggravated because of lack of sufficient constraint, the product quality of the airplane and the rocket is influenced, and the reliability and safety of the airplane and the rocket are reduced.

With the development of the pipe bending technology, a mandrel is often adopted to support the inner side wall of the guide pipe in the high-precision pipe bending process, so that the ovality of the bent part of the guide pipe is reduced, and the inner side wall of the guide pipe can be effectively prevented from being wrinkled and damaged; however, there is still a certain ovality and a certain risk of tensile failure for the outer side wall of the catheter due to lack of sufficient support.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a numerical control pipe bending apparatus for suppressing the deformation of the bend pipe into an elliptical shape, which is capable of forming a sufficient support for the outer side wall of the bend portion of the pipe, thereby further reducing the ovality of the bend portion of the pipe, and effectively preventing the outer side wall of the bend portion of the pipe from being fractured by stretching.

In order to achieve the purpose, the invention adopts the following technical scheme:

a numerical control pipe bending device for inhibiting bending pipe from becoming elliptical and crease-resistant comprises a rack, and an automatic feeding and transferring device, a crease-resistant mechanism, a supporting mechanism, a die clamping device and a die bending mechanism which are arranged on the rack, wherein the automatic feeding and transferring device conveys a conduit to a position among the crease-resistant mechanism, the supporting mechanism, the die clamping device and the die bending mechanism, and the joint cooperation of the crease-resistant mechanism, the supporting mechanism, the die clamping device and the die bending mechanism is used for completing the pipe bending operation of the conduit,

the supporting mechanism comprises a guide seat and a plurality of movable joint pressing blocks, the guide seat is arranged on the rack, the movable joint pressing blocks are distributed side by side and are arranged on the guide seat in a sliding manner, and two adjacent movable joint pressing blocks are hinged with each other; a semicircular groove is formed in the right end face of each movable joint pressing block, and the semicircular grooves in the movable joint pressing blocks are matched to form a first semicircular groove;

the die clamping device comprises a rotating frame and a clamping die, the rotating frame is rotatably arranged on the rack, the clamping die is arranged on the rotating frame, and the clamping die is hinged with a movable joint pressing block positioned at the foremost end; a linear second semicircular groove is formed in the right end face of the clamping die;

the bending die mechanism comprises a bending die which is rotatably arranged on the rack, the bending die rotates around a central shaft of the bending die, the rotating frame rotates around the central shaft of the bending die, an arc-shaped third semicircular groove and a linear fourth semicircular groove are arranged on the side wall of the bending die, the third semicircular groove is tangent to the fourth semicircular groove, and the second semicircular groove can be matched with the fourth semicircular groove to clamp the conduit;

crease-resistant mechanism includes crease-resistant mould, be equipped with the fifth half slot of linear type on the crease-resistant mould, the first half section of crease-resistant mould can stretch into the third half slot in and laminate with the third half slot to make fifth half slot and fourth half slot be linked together, first half slot can cooperate in order to with the pipe centre gripping with the fifth half slot to and can also cooperate in order to with the pipe centre gripping with the third half slot.

Preferably, the movable joint pressing block comprises a front first side wall and a rear first side wall which are symmetrically distributed, and a front second side wall and a rear second side wall which are symmetrically distributed, the first side wall is positioned on the left half part of the movable joint pressing block, the second side wall is positioned on the right half part of the movable joint pressing block, an included angle formed between the first side wall and the second side wall on the same side is an obtuse angle, and the distance between the two second side walls is gradually reduced from left to right;

two adjacent movable joint pressing blocks are hinged at the junction of the first side wall and the second side wall.

Preferably, the movable joint pressing block is provided with a front arc-shaped groove and a rear arc-shaped groove which are symmetrical, the arc-shaped grooves are positioned at the junction of the first side wall and the second side wall, and two adjacent arc-shaped grooves on two adjacent movable joint pressing blocks are matched to form a hinge hole;

and a plurality of articulated shafts are also arranged, the articulated shafts are respectively positioned in the articulated holes, and two adjacent movable joint pressing blocks are articulated through the articulated shafts.

Preferably, the movable joint pressing block is further provided with an accommodating cavity with an opening end, and the opening ends of the accommodating cavity are respectively positioned on the front side wall and the rear side wall of the movable joint pressing block;

the chain link is also provided with a plurality of chain links, the chain links are respectively arranged in the containing cavities on the movable link pressing blocks, and two adjacent chain links are rotatably connected with the articulated shaft between the two adjacent chain links.

Preferably, the clamping die comprises a base, an elastic block and a plurality of clamping pieces which are vertically overlapped, the base is installed on the clamping die base and hinged to an articulated pressing block located at the foremost end, the plurality of clamping pieces are installed on the base in a left-right sliding mode, the elastic block is installed between the base and the plurality of clamping pieces to provide elastic resistance for preventing the plurality of clamping pieces from moving towards the base, and the right end faces of the plurality of clamping pieces jointly form a right end face of the clamping die and form a second semicircular groove.

Preferably, the base comprises an upper blocking plate and a lower blocking plate, and the plurality of clamping pieces are positioned between the upper blocking plate and the lower blocking plate;

the clamping piece is provided with two parallel first long holes, the upper blocking plate is provided with two parallel second long holes, and the lower blocking plate is provided with two parallel third long holes; the second long hole on the upper blocking plate, the first long holes on the plurality of clamping pieces and the third long hole on the lower blocking plate form two long hole-shaped through holes together;

and the two guide pins are respectively arranged in the two through holes and can limit the clamping sheet to move in the front-back direction.

Preferably, the crease-resistant mechanism further comprises a first adjusting motor, an adjusting seat, a support and a first mounting plate, the crease-resistant die is mounted on the first mounting plate in a slidable manner, the first mounting plate is fixedly mounted on the support, the support is mounted on the adjusting seat in a slidable manner, the adjusting seat is rotatably mounted on the frame,

the first adjusting motor is used for driving the adjusting base to rotate on the frame.

Preferably, the crease-resistant die is further provided with a plurality of first heating pipes, the crease-resistant die is further provided with a plurality of parallel third mounting holes, the third mounting holes are in the front-back direction, and the first heating pipes are mounted in the third mounting holes.

Preferably, the automatic feeding and material transferring device comprises a mounting seat which is slidably mounted on the rack, an inner sleeve, an outer sleeve, a material clamping assembly, a first driving assembly, a second driving assembly and a third driving assembly, wherein the inner sleeve, the outer sleeve and the material clamping assembly are mounted on the mounting seat, the first driving assembly is used for driving the mounting seat to move back and forth on the rack, the second driving assembly is used for driving the outer sleeve to move back and forth, the third driving assembly is used for driving the inner sleeve to rotate, and the outer sleeve is sleeved on the inner sleeve in a hollow mode;

the material clamping assembly comprises an outer barrel, an inner barrel and a plurality of clamping blocks, the outer barrel is mounted at the front end of the outer barrel, the inner barrel is fixedly connected with the front end of the inner barrel, the outer barrel is sleeved on the inner barrel and can rotate along with the inner barrel, the outer barrel, the inner barrel, the outer barrel and the inner barrel are coaxially distributed, and the plurality of clamping blocks are fixedly mounted at the front end of the inner barrel and uniformly distributed around the axial lead of the inner barrel;

the second driving assembly drives the outer sleeve to move forwards to enable the clamping assembly to clamp the conduit, and when the clamping assembly clamps the conduit, the first driving assembly and the third driving assembly enter a working state.

Preferably, the numerical control pipe bending device is further provided with a first electrode and a second electrode, the first electrode and the second electrode are arranged on the clamping assembly at intervals, when the clamping assembly clamps the guide pipe, the first electrode and the second electrode are in conductive connection through the guide pipe, and therefore a controller of the numerical control pipe bending device obtains a feedback signal for clamping the guide pipe.

The invention has the technical effects that: before the pipe is bent, the first semicircular groove is attached to the outer side wall of the straight line part of the pipe, so that the functions of guiding and primary positioning are achieved; when carrying out crooked operation to the pipe, this first semicircle groove can play the effect that supports the lateral wall of pipe with the lateral wall laminating of the bent part of pipe, and then further reduce the ovality of pipe to the lateral wall that can effectively avoid the pipe is by tensile fracture.

Drawings

Fig. 1 is a schematic structural diagram of a numerical control elbow device for inhibiting an elbow from becoming elliptical and wrinkle-resistant according to an embodiment of the present invention;

FIG. 2 is a first schematic view (before pipe bending) of the combination of the wrinkle resisting mechanism, the supporting mechanism, the die clamping device and the die bending mechanism according to a first embodiment of the present invention;

FIG. 3 is a second schematic view of the combination of the wrinkle resisting mechanism, the supporting mechanism, the die clamping device and the die bending mechanism (in pipe bending operation) according to the first embodiment of the present invention;

FIG. 4 is a schematic structural view of a support mechanism according to a first embodiment of the present invention (with a portion of the articulation block omitted);

FIG. 5 is a schematic view of the structure of an articulated pressure block in an embodiment of the invention;

FIG. 6 is a schematic structural diagram of a mold clamping device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a clamp die according to an embodiment of the present invention;

FIG. 8 is an exploded view of a clamp die according to an embodiment of the present invention;

fig. 9 is a first cross-sectional view of the automatic feeding and transferring device according to the first embodiment of the present invention;

FIG. 10 is a second cross-sectional view of the automatic feeding and transferring device according to the first embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an automatic feeding and transferring device according to a first embodiment of the present invention;

FIG. 12 is a schematic structural view of an inner barrel according to an embodiment of the present invention;

fig. 13 is a first schematic structural diagram of an anti-wrinkle mechanism according to a first embodiment of the invention;

FIG. 14 is a schematic structural diagram II of the wrinkle resisting mechanism in the first embodiment of the present invention;

fig. 15 is a schematic structural diagram three of an anti-wrinkle mechanism in the first embodiment of the invention;

FIG. 16 is a schematic view of an anti-wrinkle module according to an embodiment of the present invention;

FIG. 17 is a first schematic structural diagram of a mold guiding mechanism according to a second embodiment of the present invention;

FIG. 18 is a second schematic structural view of a second mold guiding mechanism according to a second embodiment of the present invention;

FIG. 19 is a third schematic structural view of a mold guiding mechanism according to a second embodiment of the present invention;

FIG. 20 is a fourth schematic structural view of a mold guiding mechanism according to a second embodiment of the present invention;

FIG. 21 is a schematic view of the combination of the wrinkle resisting mechanism, the die guide holder, the die clamping device and the die bending mechanism in the third embodiment of the present invention;

fig. 22 is a schematic view of the combination of the wrinkle resisting mechanism, the die guide holder, the die clamping device and the die bending mechanism in the third embodiment of the invention.

Description of reference numerals: 1. a frame;

2. an automatic feeding and transferring device; 20. a mounting seat; 21. an inner sleeve; 22. an outer sleeve; 23. a material clamping component; 230. an outer cylinder; 231. an inner barrel; 232. a clamping block; 240. a first servo motor; 250. a second servo motor; 260. a first cylinder; 261. a first connecting member; 262. a fork member; 263. a second connecting member; 220. an annular groove; 27. a first housing; 251. a first driving tooth; 252. a first passive tooth; 280. an oil tank; 281. a second passive tooth; 282. a camshaft; 283. a cam plate; 284. an oiling pin; 285. a spring; 2310. a circular ring part; 2311. a first connection portion; 2312. a second connecting portion; 233. a bolt member;

3. an anti-wrinkle mechanism; 30. a first adjustment motor; 31. an adjusting seat; 32. a support; 33. a support post; 34. a first mounting plate; 35. a crease-resist die; 350. a fifth semicircular groove; 360. a reduction housing; 361. a bull gear; 362. a pinion gear; 363. a rotating shaft; 310. a first chute; 364. a small motor; 365. a first lead screw; 366. a first slider; 367. a second slider; 38. a fixing clip; 380. a first clamping portion; 381. a second clamping portion; 382. a first gap; 383. clamping the circular hole; 384. a second gap; 368. a threaded rod; 369. tightly pushing the nut; 370. adjusting the screw rod; 385. a first extension portion; 371. a nozzle tip; 352. an oil outlet channel; 372. a first heating pipe; 351. a third mounting hole;

4. a support mechanism; 40. a first semicircular groove; 41. a guide seat; 42. a movable joint pressing block; 420. a semicircular groove; 421. a first side wall; 422. a second side wall; 423. an arc-shaped slot; 43. hinging a shaft; 424. an accommodating chamber; 44. a chain link; 410. a first guide groove; 45. a guide block; 46. a support frame;

5. a mold clamping device; 50. a rotating frame; 51. clamping a mold; 510. a second semi-circular groove; 52. a die clamping seat; 514. a base; 511. an elastic block; 512. a clamping sheet; 5140. an upper barrier plate; 5141. a lower barrier plate; 5120. a first long hole; 5142. a second long hole; 5143. a third long hole; 513. a guide pin;

6. a die bending mechanism; 60. bending a die; 600. a third semi-circular groove; 602. an upper flange; 603. a lower flange;

7. a conduit;

80. a mounting frame; 81. a fourth drive; 82. a first guide die; 83. a second guide die; 84. a third guide die; 820. a first arc surface; 830. a second arc surface; 840. a third cambered surface; 85. a second mounting plate; 86. a second lead screw; 87. a guide bar; 88. an orthodontic nut; 89. a counter-threaded nut;

90. a guide die holder; 91. a second heating pipe; 900. and a fourth mounting hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The first embodiment is as follows:

the numerical control pipe bending equipment for inhibiting the bending pipe from becoming elliptical and crease-resistant as shown in fig. 1 comprises a rack 1, and an automatic feeding and transferring device 2, an anti-crease mechanism 3, a supporting mechanism 4, a die clamping device 5 and a die bending mechanism 6 which are arranged on the rack 1, wherein the automatic feeding and transferring device 2 is used for feeding a conduit 7 to a position between the anti-crease mechanism 3, the supporting mechanism 4, the die clamping device 5 and the die bending mechanism 6 and completing the pipe bending operation on the conduit 7 under the cooperation of the anti-crease mechanism 3, the supporting mechanism 4, the die clamping device 5 and the die bending mechanism 6, wherein before the pipe bending operation is performed, the anti-crease mechanism 3 and the die bending mechanism 6 are positioned on the right side of the conduit 7, and the supporting mechanism 4 and the die clamping device 5 are positioned on the left side of the conduit 7.

In the embodiment of the present invention, as shown in fig. 2 and 3, the support mechanism 4 is provided with a first semicircular groove 40, the first semicircular groove 40 can be attached to the outer side wall of the straight portion on the conduit 7, and when the conduit 7 is bent, the first semicircular groove 40 can also be attached to the outer side wall of the bent portion on the conduit 7; in this way, before the bending operation is performed on the conduit 7, the first semicircular groove 40 is attached to the outer side wall of the straight line part of the conduit 7, so as to play a role in guiding and preliminary positioning; when the guide pipe 7 is bent, the first semicircular groove 40 can be attached to the outer side wall of the bent part of the guide pipe 7, so that the outer side wall of the guide pipe 7 is supported, the ovality of the guide pipe 7 is further reduced, and the outer side wall of the guide pipe 7 can be effectively prevented from being broken by stretching;

in addition, since the support mechanism 4 in the embodiment of the present invention supports the outer sidewall of the conduit 7 to achieve the purpose of reducing the ovality of the conduit 7, the support mechanism 4 in the embodiment of the present invention can also cooperate with the mandrel to achieve the purpose of further reducing the ovality of the conduit 7.

In the embodiment of the present invention, as shown in fig. 2, 3 and 4, the support mechanism 4 includes a guide seat 41 and a plurality of articulated pressing blocks 42, the guide seat 41 is installed on the frame 1, the plurality of articulated pressing blocks 42 are distributed side by side and slidably installed on the guide seat 41, and two adjacent articulated pressing blocks 42 are hinged to each other;

the right end face of the movable joint pressing block 42 is provided with a semicircular groove 420, and the semicircular grooves 420 on the movable joint pressing blocks 42 are matched to form a first semicircular groove 40.

Like this, when a plurality of movable joint briquetting 42 were in same straightway, the first semicircle groove 40 that is formed by a plurality of semicircle recesses 420 was just linear, when a plurality of movable joint briquetting 42 were in an arc section, the first semicircle groove 40 that is formed by a plurality of semicircle recesses 420 was just arc-shaped, and then made first semicircle groove 40 can laminate on with pipe 7 all the time when the return bend operation to play the effect of supporting the lateral wall of pipe 7 bending part.

In the embodiment of the present invention, as shown in fig. 5, the articulated pressing block 42 includes a front first side wall 421 and a rear first side wall 422, which are symmetrically distributed, the first side wall 421 is located in the left half of the articulated pressing block 42, the second side wall 422 is located in the right half of the articulated pressing block 42, an included angle formed between the first side wall 421 and the second side wall 422 on the same side is an obtuse angle, and a distance between the two second side walls 422 gradually decreases from left to right;

two adjacent articulating pressure blocks 42 are hinged at the intersection of first side wall 421 and second side wall 422.

Further preferably, the included angle formed between the first side wall 421 and the second side wall 422 on the same side is in the range of 150 ° to 175 °; thus, a movable space is formed between two adjacent movable joint pressing blocks 42; meanwhile, the contact area of the plurality of articulated pressing blocks 42 and the bent part of the guide pipe 7 can be enlarged as much as possible, so that the first semicircular groove 40 can fully cover the bent part of the guide pipe 7, and the bent part of the guide pipe 7 can be sufficiently supported.

In the embodiment of the present invention, the two adjacent movable joint pressing blocks 42 may be hinged to each other in an up-down crossing manner, or as shown in the figure, the movable joint pressing block 42 is provided with two symmetrical arc-shaped grooves 423 at the front and the back, the arc-shaped grooves 423 are located at the junction of the first side wall 421 and the second side wall 422, and the two adjacent arc-shaped grooves 423 on the two adjacent movable joint pressing blocks 42 are matched to form a hinge hole;

and a plurality of articulated shafts 43 are further arranged, the articulated shafts 43 are respectively positioned in the articulated holes, and two adjacent movable joint pressing blocks 42 are articulated through the articulated shafts 43.

With such an arrangement, the rotation between two adjacent link pressing blocks 42 is more flexible.

It should be noted here that the hinge opening formed by the two curved grooves 423 is notched, i.e. the curvature of the curved grooves 423 does not exceed 180 °, so that there is a space for rotation between two adjacent joint blocks 42.

Still more preferably, as shown in fig. 4 and 5, the articulated pressing block 42 is further provided with a containing cavity 424 with an open end, and the open ends of the containing cavity 424 are respectively positioned on the front side wall and the rear side wall of the articulated pressing block 42;

a plurality of chain links 44 are further provided, the chain links 44 are respectively arranged in the accommodating cavities 424 on the movable joint pressing blocks 42, and two adjacent chain links 44 are rotatably connected with the hinge shafts 43 between two adjacent chain links 44.

With the arrangement, the plurality of movable joint pressing blocks 42 are connected in a chain-like manner, so that the flexibility of rotation of the movable joint pressing blocks 42 is ensured.

In the embodiment of the present invention, the chain links 44 include a plurality of chain pieces stacked on top of each other and spaced apart from each other, the plurality of chain pieces in two adjacent chain links 44 are stacked on top of each other in an intersecting manner, and the plurality of chain pieces in two adjacent chain links 44 are rotatably mounted on the hinge shafts 43 between the two adjacent chain links 44.

In the embodiment of the present invention, a linear first guide groove 410 is provided on the guide holder 41, the plurality of articulated pressing blocks 42 are slidably mounted on the first guide groove 410, and some articulated pressing blocks 42 of the plurality of articulated pressing blocks 42 can move into and out of the first guide groove 410; so that the movable joint pressing block 42 can always follow the guide pipe 7 when the guide pipe 7 moves forwards under the pushing of the automatic feeding and transferring device 2.

Further preferably, a plurality of guide blocks 45 corresponding to the movable joint pressing blocks 42 one by one are further provided, the guide blocks 45 are fixedly connected with or integrally formed with the left half section of the movable joint pressing block 42, the guide blocks 45 are slidably mounted on the first guide groove 410, and the guide blocks 45 can move in and out of the first guide groove 410 along with the movable joint pressing blocks 42;

the first guide groove 410 is a T-shaped groove or a dovetail groove.

It is so arranged that the guide block 45 can move out of and into the first guide groove 410 only in the direction of the first guide groove 410.

In the embodiment of the present invention, as shown in fig. 2, 3 and 6, the die clamping device 5 includes a rotating frame 50 and a die clamping device 51, the rotating frame 50 is rotatably mounted on the frame 1, the die clamping device 51 is mounted on the rotating frame 50, and the die clamping device 51 is hinged to the link pressing block 42 located at the foremost end; a linear second semicircular groove 510 is formed in the right end face of the clamping die 51;

as shown in fig. 2 and 3, the bending die mechanism 6 includes a bending die 60 rotatably mounted on the frame 1, the bending die 60 rotates around a central axis thereof, the rotating frame 50 rotates around the central axis of the bending die 60, an arc-shaped third semicircular groove 600 and a linear fourth semicircular groove are disposed on a side wall of the bending die 60, the third semicircular groove 600 is tangent to the fourth semicircular groove, and the clamping die 51 can abut against the bending die 60 so that the second semicircular groove 510 and the fourth semicircular groove cooperate to form a clamping hole, thereby clamping and fixing the conduit 7.

In the embodiment of the present invention, it is preferable that the bending die 60 and the rotating frame 50 are driven by the same motor to rotate, or two motors are respectively driven to rotate, so that when performing a pipe bending operation, the rotating frame 50 and the bending die 60 rotate together, the clamping die 51 rotates to drive the plurality of movable joint pressing blocks 42 to move together, and the right end faces of the plurality of movable joint pressing blocks 42 sequentially abut against the bending die 60, and simultaneously, the first semicircular groove 40 is gradually bent to form a supporting hole for supporting the outer side wall of the bending portion of the conduit 7 in cooperation with the third semicircular groove 600, thereby clamping the bending portion of the conduit 7.

Thus, since the support hole formed by the first semicircular groove 40 and the third semicircular groove 600 is a standard circular hole, the support hole can reduce the amplitude of the overall ellipse of the guide tube 7 by giving sufficient support to the outer half side of the outer side wall of the guide tube 7 during the bending process of the guide tube 7;

in addition, the rotating and bending direction of the plurality of movable joint pressing blocks 42 is the inner side direction, namely the first semicircular groove 40 can completely cover the outer half side of the outer side wall of the bent part of the guide pipe 7, so that the outer half side of the outer side wall of the bent part of the guide pipe 7 can be uniformly supported, and the phenomenon that the local part in the outer half side of the outer side wall of the bent part of the guide pipe 7 is excessively elliptic is avoided;

finally, the outer half of the outer side wall of the curved portion of the duct 7 abuts against the first semicircular groove 40, so that when the outer half of the outer side wall of the curved portion of the duct 7 is stretched, the friction existing between the outer half of the outer side wall and the first semicircular groove 40 can prevent the outer half of the outer side wall from being stretched excessively.

Further preferably, the right end face of the movable joint pressing block 42 is an inwards concave arc face and can be attached to the side wall of the bending die 60; thereby ensuring the stability of the articulated pressure pieces 42 against the support of the outer side wall of the curved portion of the duct 7 during the bending operation.

Further preferably, an upper flange 602 and a lower flange 603 are disposed on a sidewall of the bending die 60, the third semicircular groove 600 and the fourth semicircular groove are both located between the upper flange 602 and the lower flange 603, when the clamping die 51 abuts against the bending die 60 and the plurality of movable joint pressing blocks 42 abut against the bending die 60, an upper end surface and a lower end surface of the clamping die 51 abut against the upper flange 602 and the lower flange 603, respectively, and an upper end surface and a lower end surface of the plurality of movable joint pressing blocks 42 abut against the upper flange 602 and the lower flange 603, respectively. In this way, the stability of the articulated pressure pieces 42 against the support of the outer side wall of the bending section of the guide tube 7 during the bending operation can be further ensured.

In the embodiment of the present invention, the die clamping device 5 further includes a die clamping seat 52 and a first driving element, the die clamping seat 51 is fixedly installed on the die clamping seat 52, and the first driving element is used for driving the die clamping seat 52 to slide on the rotating frame 50;

the supporting mechanism 4 further comprises a second driving element and a supporting frame 46, the guide seat 41 is installed on the supporting frame 46, and the second driving element is used for driving the supporting frame 46 to slide left and right on the rack 1;

wherein, prior to the pipe bending operation, the die holder 52 is located at an initial position, and the supporting frame 46 is located at the initial position;

when the pipe bending operation is performed, the first driving piece drives the die holder 52 to move to a clamping position in a direction close to the bending die 60, and at the moment, the die holder 51 abuts against the bending die 60;

the second driving element drives the die holder 52 to move to a clamping position in a direction close to the bending die 60, and at the moment, at least one movable joint pressing block 42 abuts against the bending die 60;

after the pipe bending operation is completed, the first driving member drives the die holder 52 to return to the initial position in the direction away from the bending die 60, and the second driving member drives the supporting frame 46 to return to the initial position in the direction away from the bending die 60.

It is worth noting here that the distance that the die holder 52 moves from the initial position to the clamping position is equal to the distance that the support 46 moves from the initial position to the clamping position; and

the die holder 52 is of an L-shaped structure, and a plurality of die holders 51 can be arranged in the vertical direction to adapt to the catheters 7 with different radiuses; and

a plurality of bending dies 60 may be superimposed on the intermediate shaft for mounting the bending die 60 to accommodate conduits 7 of different radii.

In the present embodiment, when the articulated pressing pieces 42 slide on the first guide grooves 410, the adjacent two first side walls 421 of the adjacent two articulated pressing pieces 42 are abutted against each other. Thus, after the pipe bending operation is completed once, in the process that the rotating frame 50 rotates back, when the clamping die 51 pushes the movable joint pressing blocks 42 to enter the first guide groove 410, the first side wall 421 of the movable joint pressing block 42 about to enter the first guide groove 410 abuts against the first side wall 421 of the movable joint pressing block 42 in the first guide groove 410, and then the movable joint pressing blocks can be automatically adjusted to be in a state of being distributed in parallel with the movable joint pressing blocks 42 on the first guide groove 410, so that the movable joint pressing blocks can smoothly enter the first guide groove 410 and are prevented from being blocked.

Still more preferably, the supporting mechanism 4 further comprises a third driving element for driving the guiding seat 41 to slide back and forth on the supporting frame 46, wherein the third driving element drives the guiding seat 41 to move back by a distance of at least one link pressing block 42 after completing one pipe bending operation, and the third driving element drives the guiding seat 41 to move back to the initial position after the rotating frame 50 rotates back to the initial position.

With this arrangement, it is further ensured that the movable joint pressing piece 42 can smoothly enter the first guide groove 410 when retracted.

In an embodiment of the present invention, the first driving element, the second driving element and the third driving element may be motors or hydraulic cylinders.

The clamping die 51 can adopt a specific structure disclosed in Chinese patent document with the publication number of CN 101096041B; the structure in the embodiment of the present invention may also be adopted, specifically, as shown in fig. 6, 7 and 8, the clamping die 51 includes a base 514, an elastic block 511 and a plurality of clamping pieces 512 stacked up and down, the base 514 is installed on the clamping die holder 52 and hinged to the movable joint pressing block 42 located at the foremost end, the plurality of clamping pieces 512 are all installed on the base 514 in a manner of sliding left and right, the elastic block 511 is installed between the base 514 and the plurality of clamping pieces 512 and located at the left side of the plurality of clamping pieces 512, so as to provide elastic resistance for preventing the plurality of clamping pieces 512 from moving toward the base 514, and the right end surfaces of the plurality of clamping pieces 512 together form a right end surface of the clamping die 51 and form a second semicircular groove 510.

Thus, each clamping piece 512 can move independently, and the right end face of each clamping piece 512 can be attached to the outer side wall of the conduit 7 under the action of the elastic piece, so that the elbow is prevented from becoming elliptical.

Preferably, the base 514 includes an upper blocking plate 5140 and a lower blocking plate 5141, the plurality of clamping pieces 512 are located between the upper blocking plate 5140 and the lower blocking plate 5141, an uppermost clamping piece 512 of the plurality of clamping pieces 512 abuts against the upper blocking plate 5140, and a lowermost clamping piece 512 of the plurality of clamping pieces 512 abuts against the lower blocking plate 5141.

In the embodiment of the present invention, two parallel first long holes 5120 are disposed on the clamping piece 512, two parallel second long holes 5142 are disposed on the upper blocking plate 5140, and two parallel third long holes 5143 are disposed on the lower blocking plate 5141; the second long hole 5142 of the upper blocking plate 5140, the first long holes 5120 of the plurality of clamping pieces 512 and the third long hole 5143 of the lower blocking plate 5141 together form two long hole-shaped through holes;

two guide pins 513 are further provided, the two guide pins 513 being respectively installed in the two through holes and capable of restricting the movement of the clamping piece 512 in the front-rear direction.

More preferably, both ends of the first long hole 5120, both ends of the second long hole 5142, and both ends of the third long hole 5143 face in the left-right direction, respectively.

Further preferably, the top of the guide pin 513 is in interference fit with the second long hole 5142, and the bottom of the guide pin 513 is in interference fit with the third long hole 5143.

More preferably, the guide pin 513 abuts against the left end of the first long hole 5120 and a gap is left between the guide pin and the right end of the first long hole 5120; this allows the grip tab 512 to have a space for movement.

In the embodiment of the present invention, a vertical second guide groove is formed on the die holder 52, the second guide groove is a T-shaped groove or a dovetail groove, and the base 514 is mounted on the second guide groove through a first connecting block. Due to the arrangement, the clamping dies 51 can be conveniently disassembled, and a plurality of clamping dies 51 can be installed to adapt to bending operations of guide pipes 7 with different diameters.

It should be noted that in other embodiments, the clamping die 51 of the present embodiment can also be used in a tube bending machine without the articulated press blocks 42;

and, the design structure of stacking up and down multiple sheets adopted in the clamp die 51 in the embodiment of the present invention to prevent the guide tube 7 from becoming oval can also be applied to the bending die 60, the wrinkle-proof die 35 and the movable joint pressing block 42 in the wrinkle-proof mechanism 3, and can also be applied to the guide die matched with the wrinkle-proof die 35 in the common pipe bender.

In the embodiment of the present invention, as shown in fig. 13, 14, 15 and 16, the wrinkle resisting mechanism 3 includes a first adjusting motor 30, an adjusting seat 31, a support 32, a support 33 and a plurality of wrinkle resisting modules, the wrinkle resisting modules include a first mounting plate 34 and a wrinkle resisting die 35, the wrinkle resisting die 35 is provided with a linear fifth half slot 350, an arc bending portion for being attached to the bending die 60 is further provided on a back surface opposite to the fifth half slot 350, a front half section of the wrinkle resisting die 35 can extend into the third half slot 600 and be attached to the third half slot 600, and the fifth half slot 350 is communicated with the fourth half slot, the wrinkle resisting die 35 is slidably mounted on the first mounting plate 34, the first mounting plate 34 is fixedly mounted on the support 33, the support 33 is fixedly mounted on the support 32, the support 32 is slidably mounted on the adjusting seat 31, the adjusting seat 31 is rotatably mounted on the frame 1,

wherein, the sliding direction of the wrinkle-proof die 35 forms an angle with the sliding direction of the support 32, preferably an angle of 90 °, and the first adjustment motor 30 is used for driving the adjustment seat 31 to rotate on the frame 1.

Like this, through the slip of crease-resistance mould 35 on first mounting panel 34 and the slip of support 32 on adjusting the seat 31, realize the regulation to crease-resistance mould 35 position, realize the regulation to crease-resistance mould 35 angle through the rotation of adjusting the seat 31 to finally play the return bend demand that adapts to different specification pipes 7.

In the embodiment of the present invention, the wrinkle resisting mechanism 3 further includes a decelerating component, the decelerating component includes a decelerating housing 360, a large gear 361, a small gear 362 and a rotating shaft 363, the rotating shaft 363 is installed on the decelerating housing 360, the top end of the rotating shaft 363 penetrates through the machine frame 1 and is fixedly connected to the adjusting base 31, the small gear 362 is installed on the output shaft of the first adjusting motor 30 in a sleeved manner, the large gear 361 is installed on the rotating shaft 363 in a sleeved manner, and the small gear 362 and the large gear 361 are in meshing transmission.

In the embodiment of the present invention, as shown in fig. 14 and 15, two parallel first sliding grooves 310 are provided on the adjusting seat 31, and the first sliding grooves 310 are T-shaped grooves;

the adjusting device is further provided with a small motor 364, a first screw rod 365, a first sliding block 366 and a second sliding block 367, wherein the first sliding block 366 and the second sliding block 367 are both T-shaped blocks, the first sliding block 366 and the second sliding block 367 are respectively installed in the two first sliding grooves 310 in a sliding manner and fixedly connected with the support 32, a threaded hole used for being matched with the first screw rod 365 is formed in the first sliding block 366, the first screw rod 365 and the small motor 364 are both installed on the adjusting seat 31, and the small motor 364 drives the first screw rod 365 to rotate so that the support 32 slides on the adjusting seat 31; thereby achieving the purpose of adjusting the position of the wrinkle prevention die 35 and improving the stability of the wrinkle prevention die 35 in the left and right directions.

Further preferably, as shown in fig. 16, the wrinkle resistant module further includes a fixing clip 38, a clamping bolt and a clamping nut, the first mounting plate 34 is slidably mounted on the fixing clip 38, the fixing clip 38 includes a first clamping portion 380 and a second clamping portion 381, a first gap 382, a clamping circular hole 383 and a second gap 384 are sequentially disposed between the first clamping portion 380 and the second clamping portion 381, and the first gap 382 and the second gap 384 are respectively located at two opposite ends of the clamping circular hole 383 and are communicated with the clamping circular hole 383; the fixing clamp 38 is initially sleeved and installed on the pillar 33 through the clamping round hole 383, the clamping bolt sequentially passes through the first clamping portion 380, the first gap 382 and the second clamping portion 381 and then is fixedly installed on the fixing clamp 38 through the clamping nut, and the fixing clamp 38 is clamped and installed on the pillar 33.

Preferably, the anti-wrinkle device is further provided with a threaded rod 368 and a plurality of jacking nuts 369 sleeved on the threaded rod 368, the threaded rod 368 is fixedly installed on the support 32, the support 33 is provided with three anti-wrinkle modules, the diameters of fifth semicircular grooves 350 on anti-wrinkle dies 35 in the three anti-wrinkle modules are different, fixing clamps 38 in the three anti-wrinkle modules are sleeved on the threaded rod 368 through first installation holes, and the jacking nuts 369 are respectively abutted against the upper end face and the lower end face of the fixing clamps 38 in the three anti-wrinkle modules; this further ensures the stability of the mounting of the retaining clip 38 on the post 33; namely, the stability of the blank holder 35 in the up-and-down direction is ensured.

Further preferably, an adjusting screw 370 is further provided, a threaded hole is provided on the first mounting plate 34, a left side wall of the fixing clip 38 extends leftwards to form a first extension 385, and a second mounting hole is provided on the first extension 385; the adjusting screw 370 passes through the second mounting hole and then is in threaded fit with the threaded hole; this arrangement allows the first mounting plate 34 to slide on the retaining clip 38 while ensuring stability when the first mounting plate 34 stops sliding.

In the embodiment of the present invention, the anti-wrinkle module further includes a grease nipple 371, and the grease nipple 371 is fixedly mounted on the fixing clip 38;

an oil inlet channel is arranged on the fixing clamp 38 and is connected with the oil nozzle 371;

a plurality of oil outlet channels 352 are arranged on the crease-resist die 35, the oil outlet channels 352 are all communicated with the oil inlet channel on the fixing clamp 38, and oil outlets of the oil outlet channels 352 are all positioned on the wall of the fifth semicircular groove 350;

the oil outlets of the oil outlet channels 352 are provided with a ball, the ball forms a spherical seal at the oil outlet, the ball protrudes out of the groove wall of the fifth semicircular groove 350, and when the ball is contacted with the conduit 7 and generates relative motion, the ball rotates around the center of the ball to send out oil.

It should be noted here that the structure and function of the ball of the present invention that rotates freely around its center of sphere can refer to the structure and function of the ball in the pen tip of a ball-point pen that rotates freely, the surface of the ball is filled with lubricant, and the lubricant can be supplemented during the rotation of the ball, so that when the blank-proof mold 35 cooperates with the articulated pressing blocks 42 to clamp the guide tube 7, the balls on the blank-proof mold 35 contact the guide tube 7, and there is lubricant between the balls and the guide tube 7;

then when pipe 7 shifts forward under the promotion of autoloading commentaries on classics material device 2, the frictional force between pipe 7 and ball impels the ball to take place to rotate, and then continuous send out the oil in the oil passageway 352, and when pipe 7 no longer shifts forward, the ball no longer rotates and no longer sends out the oil in the oil passageway 352, and then has realized the self-lubricate to pipe 7, still has guaranteed good lubricated effect simultaneously, the while still very big degree reduction the use amount of lubricating oil.

In other embodiments, the ball may be replaced by a contact sensor, and specifically, each of the oil outlets 352 is provided with a contact sensor, when the conduit 7 contacts the contact sensor, the oil nozzle 371 can be triggered to inject oil to lubricate the conduit 7, and both the amount and the number of times of oil injection can be controlled by the system program.

In the embodiment of the present invention, as shown in fig. 21 and 22, a plurality of first heating pipes 372 are further provided, a plurality of parallel third installation holes 351 are further provided on the blank-preventing die 35, the third installation holes 351 are in a front-back direction, and the plurality of first heating pipes 372 are installed in the third installation holes 351. Thus, the material performance of the conduit 7 with poor material extensibility in the normal temperature environment is greatly improved by heating, so that the qualified conduit 7 is bent.

Further preferably, a first temperature sensor is provided, which is used to detect the temperature of the blank holder 35.

More preferably, the material of the blank-holding die 35 is high-temperature-resistant steel.

In the embodiment of the present invention, the adjustment method of the wrinkle resistance mechanism 3 is as follows:

the method comprises the following steps: according to the requirement of the catheter 7, the crease-resist die 35 is firstly rotated to a specified angle through the first adjusting motor 30, and when the specified angle is reached, an included angle which is not more than 2 degrees is formed between the crease-resist die 35 and the catheter 7, and preferably, an included angle which is not more than 1 degree is formed between the crease-resist die 35 and the catheter 7;

step two: and then the position of the crease-resist die 35 is finely adjusted by a small motor 364 and an adjusting screw 370.

In the embodiment of the invention, as shown in fig. 9, 10 and 11, the automatic feeding and transferring device 2 comprises a mounting base 20 slidably mounted on the frame 1, and an inner sleeve 21, an outer sleeve 22, a material clamping assembly 23, a first driving assembly for driving the mounting base 20 to move back and forth on the frame 1, a second driving assembly for driving the outer sleeve 22 to move back and forth and a third driving assembly for driving the inner sleeve 21 to rotate, which are mounted on the mounting base 20, wherein the outer sleeve 22 is sleeved on the inner sleeve 21;

the material clamping assembly 23 comprises an outer cylinder 230, an inner cylinder 231 and a plurality of clamping blocks 232, the outer cylinder 230 is fixedly arranged at the front end of the outer sleeve 22, the inner cylinder 231 is fixedly connected with the front end of the inner sleeve 21, the outer cylinder 230 is sleeved on the inner cylinder 231 and can rotate along with the inner cylinder 231, the outer sleeve 22, the inner sleeve 21, the outer cylinder 230 and the inner cylinder 231 are coaxially distributed, and the clamping blocks 232 are fixedly arranged at the front end of the inner cylinder 231 and evenly distributed around the axial lead of the inner cylinder 231;

wherein the second driving component drives the outer sleeve 22 to move forwards to cause the clamping component 23 to clamp the conduit 7, and when the clamping component 23 clamps the conduit 7, the first driving component and the third driving component enter a working state; further, under the control of the control system in the embodiment of the present invention, the first driving assembly can drive the mounting base 20 to move back and forth on the frame 1 to drive the guide tube 7 to move back and forth, and the third driving assembly can drive the inner cylinder 231 to rotate to drive the guide tube 7 to rotate.

Therefore, before the automatic feeding and material transferring device 2 can feed and transfer materials, the guide pipe 7 is clamped by the clamping blocks in advance, and the automatic induction function of the automatic feeding and material transferring device 2 is further realized.

In the embodiment of the present invention, the first driving assembly drives the mounting base 20 to move on the frame 1 through the first servo motor 240, and the third driving assembly drives the inner sleeve 21 to rotate through the second servo motor 250.

In the embodiment of the present invention, a first electrode and a second electrode are further provided, the first electrode and the second electrode are arranged on the plurality of clamping blocks 232 at intervals, when the clamping assembly 23 clamps the conduit 7, the first electrode and the second electrode are in conductive connection through the conduit 7, so that a controller of the numerical control pipe bending device obtains a feedback signal for clamping the conduit 7; specifically, the first electrode and the second electrode are connected in a sensing circuit, and when the first electrode and the second electrode are conducted, the sensing circuit generates a signal of the clamping conduit 7 and feeds the signal back to a controller of the numerical control pipe bending device.

Preferably, the inner sleeve 21 is provided with a first conducting ring, a second conducting ring and a change-over switch, the first electrode is in conductive connection with the induction circuit installed on the rack 1 through the first conducting ring and the first carbon brush, and the second electrode is in conductive connection with the induction circuit installed on the rack 1 through the second conducting ring and the second carbon brush; the switch converts the electrical signal into a digital signal and sends the digital signal to the controller, and the controller then controls the first servo motor 240 to drive the mounting base 20 to move on the frame 1, and controls the second servo motor 250 to drive the inner sleeve 21 to rotate according to the specific setting.

In the embodiment of the present invention, the first driving assembly further includes a walking gear and a rack, the mounting base 20 is slidably mounted on the frame 1 through the cooperation of a sliding block and a sliding groove, the walking gear is mounted on the mounting base 20, the rack is mounted on the frame 1, the walking gear is in meshing transmission with the rack, and the first servo motor 240 drives the walking gear to rotate so as to drive the mounting base 20 to move back and forth on the frame 1.

In the embodiment of the present invention, as shown in fig. 9 and 10, the second driving assembly includes a first oil cylinder 260, a first connecting member 261, two shifting fork members 262 and two second connecting members 263, the two second connecting members 263 are fixedly installed on the installation base 20 and located below the outer sleeve 22, the extending rod of the first oil cylinder 260 is rotatably installed on the installation base 20, and the first oil cylinder 260 is located above the outer sleeve 22;

the first connecting piece 261 is H-shaped, the upper end of the first connecting piece 261 is hinged with the first oil cylinder 260, and the lower end of the first connecting piece 261 is hinged with the two second connecting pieces 263 respectively;

the outer sleeve 22 is provided with an annular groove 220; the two shifting fork members 262 are installed at the lower half section of the first connecting member 261, the two shifting fork members 262 are located in the annular groove 220 and located at the left and right sides of the outer sleeve 22, respectively, and the shifting fork members 262 are abutted against the front side wall and the rear side wall of the annular groove 220.

Thus, the extension and retraction of the extending rod of the first oil cylinder 260 can be converted into the rotation of the first connecting member 261, and the rotation of the second connecting member 263 can cause the two fork members 262 to drive the outer sleeve 22 to move forward or backward.

In the embodiment of the present invention, the third driving assembly further includes a first housing 27, a first driving tooth 251 and a first driven tooth 252, the first housing 27 is fixedly mounted on the mounting base 20, the second servo motor 250 is mounted on the first housing 27, and the first driving tooth 251 is located in the first housing 27; the first driving tooth 251 is mounted on an output shaft of the second servo motor 250 through a key connection, the first driven tooth 252 is mounted on the inner sleeve 21 through a key connection, and the first driving tooth 251 and the first driven tooth 252 are in meshing transmission.

Further preferably, the diameter of the first driving tooth 251 is smaller than that of the first driven tooth 252; with this arrangement, it is possible to reduce the rotation rate of the inner sleeve 21 and improve the rotation accuracy of the inner sleeve 21.

In the embodiment of the present invention, an oil injection mechanism is further provided, and the oil injection mechanism is mounted at the upper end of the first housing 27, and when the third driving assembly drives the inner sleeve 21 to rotate, the oil injection mechanism can be driven to inject oil into the first housing 27 at the same time.

Further preferably, the oil injection mechanism comprises an oil tank 280, a second driven tooth 281, a cam shaft 282, a cam plate 283 and an oil injection pin 284, wherein the oil tank 280 is arranged at the top of the first housing 27, an oil injection channel communicated with the interior of the first housing 27 is arranged in the oil tank 280, and the oil injection pin 284 is positioned in the oil injection channel;

the cam shaft 282 is rotatably mounted inside the first housing 27, the cam plate 283 and the second driven teeth 281 are both mounted on the cam shaft 282 through a key connection, the second driven teeth 281 are in meshing transmission with the first driving teeth 251, and the cam plate 283 can jack up the oiling pin 284 to open the oiling channel during the rotation of the cam plate 283; and further realize the automatic oiling of oiling mechanism.

It is further preferable that the oil filling pin 284 includes a pin portion that can pass through the oil filling passage and contact the cam plate 283, and a stopper portion that has a diameter larger than that of the pin portion and blocks the oil filling passage.

Further preferably, a spring 285 is further provided, the spring 285 is located in the oil tank 280 and sleeved on the oil filling pin 284, the top end of the spring 285 abuts against the top of the oil tank 280, and the bottom end of the spring 285 abuts against the blocking part.

Further preferably, the cam plate 283 is positioned right above the first driving tooth 251, and the first driving tooth 251 is positioned right above the first driven tooth 252; thus, the lubricating effect can be further ensured.

In the embodiment of the present invention, as shown in fig. 12, the inner cylinder 231 includes a circular ring portion 2310, four first connection portions 2311 and four second connection portions 2312, which are integrally formed, the four first connection portions 2311 are located in front of the circular ring portion 2310 and are circumferentially and uniformly distributed, the four first connection portions 2311 are matched to form a cylindrical side surface, the four second connection portions 2312 are located in front of the four first connection portions 2311 and are circumferentially and uniformly distributed, the four second connection portions 2312 are matched to form a side surface of a circular truncated cone, and the diameter of the side surface of the circular truncated cone is gradually increased from the back to the front; thus, when the second driving assembly drives the outer sleeve 22 to move forward, the outer sleeve 22 pushes the outer cylinder 230 to move forward, thereby continuously compressing the four second connecting portions 2312, and achieving the purpose of clamping the catheter 7.

Further preferably, a bolt member 233 is further provided, and a guide hole is formed in a gap between two adjacent first connecting portions 2311, and the outer cylinder 230 is mounted in the guide hole by the bolt member 233.

A bent pipe processing method for inhibiting the bent pipe from becoming elliptical specifically comprises the following steps:

the method comprises the following steps: extending the front half section of the crease-resist die 35 into the third semicircular groove 600 and attaching the crease-resist die to the third semicircular groove 600, and enabling the fifth semicircular groove 350 to be communicated with the fourth semicircular groove;

step two; the automatic feeding and material transferring device 2 sends the conduit 7 to the positions among the crease-resist die 35, the supporting mechanism 4, the clamping die 51 and the bending die 60;

step three: the supporting mechanism 4 moves towards the direction close to the conduit 7 until the supporting mechanism abuts against the crease-resist die 35 so that the first semicircular groove 40 and the fifth semicircular groove 350 cooperate to clamp the conduit 7; and simultaneously the clamping die 51 moves towards the direction close to the conduit 7 until the clamping die abuts against the bending die 60 so that the second semicircular groove 510 and the fourth semicircular groove cooperate to clamp the conduit 7;

step four: the bending die 60 rotates around the central axis thereof, and simultaneously the rotating frame 50 rotates around the central axis of the bending die 60 and is in accordance with the rotating direction of the bending die 60, so that the plurality of movable joint pressing blocks 42 are pulled by the clamping die 51 to move, so that the plurality of movable joint pressing blocks 42 sequentially abut against the bending die 60, and the first semicircular groove 40 which is gradually bent is matched with the third semicircular groove 600 to clamp the conduit 7.

Further preferably, after the conduit 7 is bent, the plurality of articulated pressing blocks 42, the clamping die 51 and the bending die 60 need to return to the initial positions, and the specific steps are as follows:

fifthly, the supporting mechanism 4 moves towards the direction far away from the conduit 7, and simultaneously the clamping die 51 moves towards the direction far away from the conduit 7;

step six: the bending die 60 rotates around the central axis thereof to an initial position, and simultaneously the rotating frame 50 rotates around the central axis of the bending die 60 to an initial position; thereby pushing the plurality of articulated pressing blocks 42 to move so that the plurality of articulated pressing blocks 42 return to the initial position;

and repeating the steps from two to six to finish the next pipe bending operation.

The utility model provides a restrain numerical control return bend equipment control system that oval for control foretell restrain the numerical control return bend equipment that oval, it still includes control assembly, first position sensor, second position sensor, third position sensor, fourth position sensor, fifth position sensor and sixth position sensor can be for when contacting the sensor also can be light shadow sensor.

When the guide pipe 7 is conveyed to a designated position, the first position sensor sends a signal to the controller, and the controller controls the automatic feeding and material transferring device 2 to stop feeding and controls the supporting mechanism 4 to move towards the direction close to the guide pipe 7 until the supporting mechanism abuts against the crease-resist die 35 so that the first semicircular groove 40 and the fifth semicircular groove 350 are matched to clamp the guide pipe 7; and controlling the clamping die 51 to move towards the direction close to the conduit 7 until the clamping die abuts against the bending die 60 so that the second semicircular groove 510 and the fourth semicircular groove cooperate to clamp the conduit 7;

when the supporting mechanism 4 and the clamping die 51 move to the designated positions, the second position sensor sends a signal to the controller, the controller controls the automatic feeding and material transferring device 2 to push the guide pipe 7 to move forwards and controls the clamping die 51 and the bending die 60 to rotate around the central axis of the bending die 60 so as to bend the guide pipe 7, and meanwhile, the clamping die 51 can also drive the supporting mechanism 4 to move so that the first semicircular groove 40 can be attached to the outer side wall of the bent part of the guide pipe 7.

When the bending die 60 or the rotating frame 50 rotates to a designated position, the third position sensor sends a signal to the controller, and the controller controls the supporting mechanism 4 to move away from the conduit 7 and simultaneously controls the clamping die 51 to move away from the conduit 7;

when the supporting mechanism 4 and the clamping die 51 are retracted to the designated positions, the fourth position sensor sends signals to the controller, and the controller controls the clamping die 51 and the bending die 60 to rotate around the central shaft of the bending die 60 to the initial positions.

After the clamping die 51 and the bending die 60 rotate around the central shaft of the bending die 60 to the initial position, the fifth position sensor sends a signal to the controller, and the controller controls the automatic feeding and material transferring device 2 to push the guide pipe 7 forward, so that the next pipe bending operation is completed; further preferably, according to the preset input angle, after the fifth position sensor sends a signal to the controller, the controller controls the automatic feeding and material transferring device 2 to rotate the guide pipe 7 by the input angle around the central axis and then push the guide pipe 7 forward.

When the automatic feeding and material transferring device 2 moves to a designated position, the sixth position sensor sends a signal to the controller, and the controller controls the automatic feeding and material transferring device 2 to loosen the guide pipe 7 and retreat to an initial position, so that all pipe bending operations of the same guide pipe 7 are completed.

Example two

The difference between this embodiment and the first embodiment is that the joint pressing block 42 and the guide seat 41 in the first embodiment are not used; but is replaced by a die guide mechanism.

It should be noted that the clamp die 51 in this embodiment is not hinged to the die guide mechanism.

In the embodiment of the present invention, as shown in fig. 17, 18, 19 and 20, the die guide mechanism includes a mounting bracket 80 and a fourth driving member 81 mounted on the frame 1, and a first guide die 82, a second guide die 83 and a third guide die 84 mounted on the mounting bracket 80 from top to bottom, a right end surface of the first guide die 82 is provided with a linear first arc surface 820, a right end surface of the second guide die 83 is provided with a linear second arc surface 830, and a right end surface of the third guide die 84 is provided with a linear third arc surface 840;

the fourth driving part 81 is used for driving two of the first guide die 82, the second guide die 83 and the third guide die 84 to move up and down; thereby separating or closing the first guide die 82, the second guide die 83 and the third guide die 84, and when the first guide die 82, the second guide die 83 and the third guide die 84 are closed, the first arc surface 820, the second arc surface 830 and the third arc surface 840 are matched to form a semi-elliptical groove with a semi-elliptical cross section.

In this way, before the pipe bending operation is performed on the pipe 7, the fourth driving member 81 drives the first guide die 82, the second guide die 83 and the third guide die 84 to close, so that the portion to be bent on the pipe 7 can be pressed to be oval first, the vertical height of the pipe 7 is reduced, and the horizontal width of the pipe 7 is widened;

when the pipe 7 is bent, the ellipse changing direction of the bending part is that the height of the upper part and the lower part is increased and the width of the left part and the right part of the pipe 7 is narrowed; that is, the mould guiding mechanism in the embodiment of the invention can neutralize the deformation of the conduit 7 during the pipe bending operation by pressing the conduit 7 into an ellipse, thereby finally achieving the purpose of reducing the ovality of the conduit 7.

In the embodiment of the present invention, the fourth driving member 81 drives the first guide die 82 and the third guide die 84 to approach or separate from the second guide die 83; by such arrangement, the catheter 7 can be better changed into an elliptical shape.

In the embodiment of the present invention, the fourth driving component 81 may be an oil cylinder or a servo motor; in this embodiment, the fourth driving member 81 is a servo motor, and further includes a second mounting plate 85, a second lead screw 86, and a plurality of guide rods 87, the mounting plate is fixedly mounted on the mounting frame 80 and located above the first guide mold 82, the fourth driving member 81 and the plurality of guide rods 87 are fixedly mounted on the mounting plate, the first guide mold 82 and the third guide mold 84 are mounted on the plurality of guide rods 87 in a vertically movable manner, the second guide mold 83 is fixedly mounted on the mounting frame 80, the mounting plate, or the plurality of guide rods 87, the second lead screw 86 is in positive thread fit with the first guide mold 82, the second lead screw 86 is in reverse thread fit with the third guide mold 84, and the fourth driving member 81 drives the second lead screw 86 to rotate so that the first guide mold 82 and the third guide mold 84 move closer to or farther away from the second guide mold 83.

Preferably, the screw driver is further provided with an orthodontic nut 88 and an anti-orthodontic nut 89, wherein the orthodontic nut 88 is fixedly connected with the first guide die 82 and is in positive thread fit with the second screw rod 86, and the anti-orthodontic nut 89 is fixedly connected with the third guide die 84 and is in negative thread fit with the second screw rod 86.

In the embodiment of the present invention, the second driving element, i.e. the servo motor, can also drive the mounting frame 80 to slide left and right on the rack 1.

EXAMPLE III

The difference between the present embodiment and the first embodiment is that the movable joint pressing block 42 and the guide holder 41 in the first embodiment are not used; but is replaced by a guide shoe 90.

It should be noted that the clamp die 51 of the present embodiment is not hinged to the guide die seat 90.

In this embodiment, as shown in fig. 21 and fig. 22, a plurality of second heating pipes 91 are further provided, a plurality of parallel fourth mounting holes 900 are further provided on the guide die holder 90, the fourth mounting holes 900 are in the front-back direction, and the plurality of second heating pipes 91 are mounted in the fourth mounting holes 900.

Further preferably, a second temperature sensor is further provided, and the second temperature sensor is used for detecting the temperature of the guide die holder 90.

Preferably, the guide die holder 90 is made of high temperature resistant steel.

It should be noted that the plurality of second heating pipes 91 in the present embodiment can also be applied to the die guiding mechanism in the second embodiment, that is, the first guide die 82, the second guide die 83, and the third guide die 84 in the second embodiment together form the die guiding seat 90 in the present embodiment.

In the description herein, references to the description of the term "one embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make variations, modifications, substitutions and alterations within the scope of the present invention without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A numerical control elbow device for inhibiting an elbow from becoming elliptical and crease-resistant comprises a rack (1), and an automatic feeding and transferring device (2), an anti-crease mechanism (3), a supporting mechanism (4), a die clamping device (5) and a die bending mechanism (6) which are arranged on the rack (1), wherein the automatic feeding and transferring device (2) conveys a conduit (7) to positions among the anti-crease mechanism (3), the supporting mechanism (4), the die clamping device (5) and the die bending mechanism (6), and the joint cooperation of the anti-crease mechanism (3), the supporting mechanism (4), the die clamping device (5) and the die bending mechanism (6) is used for finishing elbow operation on the conduit (7), and the numerical control elbow device is characterized in that;

the supporting mechanism (4) comprises a guide seat (41) and a plurality of movable joint pressing blocks (42), the guide seat (41) is installed on the rack (1), the movable joint pressing blocks (42) are distributed side by side and are installed on the guide seat (41) in a sliding mode, and every two adjacent movable joint pressing blocks (42) are hinged to each other; a semicircular groove (420) is formed in the right end face of the movable joint pressing block (42), and the semicircular grooves (420) in the movable joint pressing blocks (42) are matched to form a first semicircular groove (40);

the die clamping device (5) comprises a rotating frame (50) and a clamping die (51), the rotating frame (50) is rotatably installed on the rack (1), the clamping die (51) is installed on the rotating frame (50), and the clamping die (51) is hinged to the movable joint pressing block (42) located at the foremost end; a linear second semicircular groove (510) is formed in the right end face of the clamping die (51);

the bending die mechanism (6) comprises a bending die (60) which is rotatably installed on the rack (1), the bending die (60) rotates around a central shaft of the bending die (60), the rotating frame (50) rotates around the central shaft of the bending die (60), an arc-shaped third semicircular groove (600) and a linear fourth semicircular groove are formed in the side wall of the bending die (60), the third semicircular groove (600) is tangent to the fourth semicircular groove, and the second semicircular groove (510) can be matched with the fourth semicircular groove to clamp the guide pipe (7);

the anti-wrinkle mechanism (3) comprises an anti-wrinkle die (35), a linear fifth semicircular groove (350) is formed in the anti-wrinkle die (35), the front half section of the anti-wrinkle die (35) can extend into the third semicircular groove (600) and is attached to the third semicircular groove (600), the fifth semicircular groove (350) is communicated with the fourth semicircular groove, the first semicircular groove (40) can be matched with the fifth semicircular groove (350) to clamp the catheter (7), and can also be matched with the third semicircular groove (600) to clamp the catheter (7);

the movable joint pressing block (42) comprises a first side wall (421) and a second side wall (422), the first side wall (421) and the second side wall are symmetrically distributed, the first side wall is located on the left half portion of the movable joint pressing block (42), the second side wall (422) is located on the right half portion of the movable joint pressing block (42), an included angle formed between the first side wall (421) and the second side wall (422) on the same side is an obtuse angle, and the distance between the two second side walls (422) is gradually reduced from left to right;

two adjacent hinge pressing blocks (42) are hinged at the junction of the first side wall (421) and the second side wall (422);

the movable joint pressing block (42) is provided with a front arc-shaped groove and a rear arc-shaped groove (423), the arc-shaped grooves (423) are positioned at the junction of the first side wall (421) and the second side wall (422), and two adjacent arc-shaped grooves (423) on two adjacent movable joint pressing blocks (42) are matched to form a hinge hole;

a plurality of articulated shafts (43) are further arranged, the articulated shafts (43) are respectively positioned in the articulated holes, and two adjacent movable joint pressing blocks (42) are articulated through the articulated shafts (43);

the movable joint pressing block (42) is also provided with an accommodating cavity (424) with an open end, and the open end of the accommodating cavity (424) is respectively positioned on the front side wall and the rear side wall of the movable joint pressing block (42);

the chain is also provided with a plurality of chain links (44), the chain links (44) are respectively arranged in the containing cavities (424) on the movable joint pressing blocks (42), and two adjacent chain links (44) are rotatably connected with the hinge shafts (43) between two adjacent chain links (44).

2. The numerically controlled elbow device for inhibiting ovalization and wrinkle resistance of the elbow according to claim 1, wherein the included angle formed between the first side wall (421) and the second side wall (422) on the same side is in the range of 150 ° to 175 °.

3. The numerical control elbow device for inhibiting the bending pipe from becoming elliptical and crease-resistant according to claim 1, wherein the clamping die (51) comprises a base (514), an elastic block (511) and a plurality of clamping sheets (512) stacked up and down, the base (514) is mounted on the clamping die holder (52) and hinged to the movable joint pressing block (42) located at the foremost end, the plurality of clamping sheets (512) are mounted on the base (514) in a left-right sliding manner, the elastic block (511) is mounted between the base (514) and the plurality of clamping sheets (512) to provide elastic resistance for preventing the plurality of clamping sheets (512) from moving towards the base (514), and the right end faces of the plurality of clamping sheets (512) jointly form the right end face of the clamping die (51) and form the second semicircular groove (510).

4. The numerical control elbow device for inhibiting the bending of the elbow from becoming elliptical and crease-resistant according to claim 3, wherein the base (514) comprises an upper barrier plate (5140) and a lower barrier plate (5141), and the plurality of clamping pieces (512) are positioned between the upper barrier plate (5140) and the lower barrier plate (5141);

the clamping piece (512) is provided with two parallel first long holes (5120), the upper blocking plate (5140) is provided with two parallel second long holes (5142), and the lower blocking plate (5141) is provided with two parallel third long holes (5143); the second long hole (5142) on the upper blocking plate (5140), the first long holes (5120) on the plurality of clamping pieces (512) and the third long hole (5143) on the lower blocking plate (5141) jointly form two long hole-shaped through holes;

two guide pins (513) are further provided, the two guide pins (513) being respectively installed in the two through holes and capable of restricting the movement of the clamping piece (512) in the front-rear direction.

5. The NC pipe bending apparatus for inhibiting bending ovality and wrinkle according to claim 1, wherein the wrinkle resisting mechanism (3) further comprises a first adjusting motor (30), an adjusting seat (31), a support (32), a pillar (33) and a first mounting plate (34), the wrinkle resisting die (35) is slidably mounted on the first mounting plate (34), the first mounting plate (34) is fixedly mounted on the pillar (33), the pillar (33) is fixedly mounted on the support (32), the support (32) is slidably mounted on the adjusting seat (31), the adjusting seat (31) is rotatably mounted on the frame (1),

the anti-wrinkling device is characterized in that an included angle is formed between the sliding direction of the anti-wrinkling die (35) and the sliding direction of the support (32), and the first adjusting motor (30) is used for driving the adjusting seat (31) to rotate on the frame (1).

6. The numerical control pipe bending device for inhibiting the bending pipe from becoming elliptical and crease-resistant according to claim 1, wherein a plurality of first heating pipes (372) are further provided, a plurality of parallel third mounting holes (351) are further provided in the crease-resistant die (35), the third mounting holes (351) are in the front-back direction, and the plurality of first heating pipes (372) are mounted in the third mounting holes (351).

7. The numerical control bend pipe device for inhibiting the bending pipe from becoming elliptical and crease as claimed in claim 1, wherein the automatic feeding and transferring device (2) comprises a mounting base (20) slidably mounted on the frame (1), an inner sleeve (21), an outer sleeve (22), a clamping assembly (23), a first driving assembly for driving the mounting base (20) to move back and forth on the frame (1), a second driving assembly for driving the outer sleeve (22) to move back and forth and a third driving assembly for driving the inner sleeve (21) to rotate, wherein the outer sleeve (22) is sleeved on the inner sleeve (21) in an empty way;

the clamping assembly (23) comprises an outer cylinder (230), an inner cylinder (231) and a plurality of clamping blocks (232), the outer cylinder (230) is mounted at the front end of an outer sleeve (22), the inner cylinder (231) is fixedly connected with the front end of the inner sleeve (21), the outer cylinder (230) is sleeved on the inner cylinder (231) and can rotate along with the inner cylinder (231), the outer sleeve (22), the inner sleeve (21), the outer cylinder (230) and the inner cylinder (231) are coaxially distributed, and the plurality of clamping blocks (232) are fixedly mounted at the front end of the inner cylinder (231) and evenly distributed around the axial lead of the inner cylinder (231);

wherein the second driving assembly drives the outer sleeve (22) to move forwards to enable the clamping assembly (23) to clamp the conduit (7), and when the clamping assembly (23) clamps the conduit (7), the first driving assembly and the third driving assembly enter a working state.

8. The numerical control pipe bending device for inhibiting bending pipe from becoming elliptical and crease-resistant according to claim 7, wherein a first electrode and a second electrode are further provided, the first electrode and the second electrode are arranged on the clamping assembly (23) at intervals, when the clamping assembly (23) clamps the guide pipe (7), the first electrode and the second electrode are in conductive connection through the guide pipe (7), so that a controller of the numerical control pipe bending device obtains a feedback signal for clamping the guide pipe (7).