CN111347097A - Double-saw circular cutting machine for machining stainless steel pipe fitting - Google Patents

Abstract

The invention provides a double-saw surrounding cutting machine for processing stainless steel pipes, which comprises a mounting frame, a clamping and feeding device and a surrounding cutting device, wherein the clamping and feeding device is provided with two clamping and feeding devices which are arranged and fixedly arranged on the mounting frame in a front-back mode, the middle positions of the clamping and feeding device and the surrounding cutting device can allow pipes to pass through, the clamping and feeding device can guide and clamp the penetrated pipes, the surrounding cutting device can cut the penetrated pipes, the clamping and feeding device comprises a clamping part and a square frame-shaped driving part, the clamping part is arranged on the inner side of the driving part, the surrounding cutting device comprises a cutting mechanism, a pressing mechanism, a driving part and a rotary driving mechanism, the cutting mechanism is arranged on the inner side of the driving part and is symmetrically provided with two pressing mechanisms, and the rotary driving mechanism can drive the driving part and the cutting mechanism, The pressing mechanism synchronously rotates around the axial direction of the pipe fitting.

Description

Double-saw circular cutting machine for machining stainless steel pipe fitting

Technical Field

The invention relates to a cutting machine, in particular to a double-saw circular cutting machine for machining stainless steel pipes.

Background

With the development of the modern machining industry, the requirements on the cutting quality and precision are continuously improved, and the requirements on improving the production efficiency, reducing the production cost and having a high-intelligent automatic cutting function are also improved. The cutting machines are classified into a metal material cutting machine and a non-metal material cutting machine, which are distinguished from cutting materials. The nonmetal material cutting machine generally needs to cut pipe fittings, wood and stones, and the applicant searches and finds that the existing ordinary cutting machine has obvious defects in cutting the pipe fittings, particularly, when the pipe fittings are cut and cut off by a cutting piece, the cut end faces are difficult to reach flatness, so the cut end faces need to be trimmed after being cut off, on one hand, the time of operators is wasted, on the other hand, certain pipe fitting materials are wasted, and particularly, the technical problem is more prominent when the large-diameter pipe fittings are cut.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the double-saw surrounding pipe fitting cutting machine which is ingenious in structure, simple in principle, convenient to operate and use, high in automation degree and high in flatness of a cutting end face.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

A double-saw surrounding cutting machine for processing stainless steel pipes comprises a mounting frame, two clamping and feeding devices and a surrounding cutting device, wherein the two clamping and feeding devices are arranged and fixedly arranged on the mounting frame in a front-back mode, the surrounding cutting device is also fixedly arranged on the mounting frame, one clamping and feeding device is positioned between the other clamping and feeding device and the surrounding cutting device, the middle positions of the clamping and feeding devices and the surrounding cutting device can allow pipes to pass through, the clamping and feeding devices can guide and clamp the penetrating pipes and feed the pipes to the surrounding cutting device, the surrounding cutting device can cut the penetrating pipes, each clamping and feeding device comprises a clamping part and a square-frame-shaped driving part, the clamping parts are arranged on the inner side of the driving part, the clamping parts are symmetrically arranged in a group up and down mode, and the clamping parts are symmetrically arranged in a group left, the pipe fitting can pass through the two groups of clamping components, the driving component can drive each group of clamping components to move close to each other and guide and clamp the pipe fitting, the surrounding cutting device comprises a cutting mechanism, a pressing mechanism, two driving components and two rotary driving mechanisms, the cutting mechanism is arranged on the inner side of the driving component and is symmetrically arranged, the two pressing mechanisms are arranged on the inner side of the driving component and are symmetrically arranged, the driving component can drive the cutting mechanism to move close to each other and can drive the pressing mechanisms to move close to each other and enable the pressing mechanisms to clamp the passed pipe fitting, and the rotary driving mechanism can drive the driving component, the cutting mechanism and the pressing mechanisms to synchronously rotate around the axial direction of the pipe fitting;

the driving part in the clamping and feeding device and the driving part in the surrounding cutting device are consistent in structure and shape, the center lines of the driving part and the driving part are coincident, the driving part in the clamping and feeding device is fixedly connected with the mounting frame and is defined as a first driving part, the driving part in the surrounding cutting mechanism is in rotating connection and matching with the mounting frame through a rotating driving mechanism, and the driving part is defined as a second driving part.

As a further optimization or improvement of the present solution.

The clamping component comprises a rectangular mounting plate, the length direction of the mounting plate is parallel to the axial direction of the pipe fitting, the mounting plate is provided with two mounting plates which are arranged at intervals, the mounting plates are positioned at the middle position of the inner side of the square driving component and are arranged perpendicular to the corresponding side length, the middle position of one side of the two mounting plates, which is close to the driving component, is fixedly provided with a connecting plate for connecting the two mounting plates, a driving roller, a driven roller and a transition roller which are arranged between the two mounting plates and have the same diameter are rotatably arranged, the axial directions of the driving roller, the driven roller and the transition roller are all parallel to, the driven roller is located the other end of mounting panel along length direction, and the transition cylinder is provided with a plurality ofly and closely arranges between initiative cylinder and driven roller, and the wraparound is provided with the transportation area and the transportation area that constitute closed loop and has seted up anti-skidding line between initiative cylinder and the driven roller on.

As a further optimization or improvement of the present solution.

The connecting plate is fixedly provided with a fixing frame staggered with the first driving part, a first transmission shaft axially parallel to the axial direction of the driving roller is arranged on the fixing frame in a rotating mode, the end portion of the first transmission shaft extends to the outer side of the mounting plate, a first transmission assembly connected with the first transmission shaft and the driving end of the driving roller is arranged between the end portion of the first transmission shaft and the driving end of the driving roller, the first transmission assembly is a belt transmission assembly and can transmit the power of the first transmission shaft to the driving roller and drive the driving roller to rotate, the fixing frame is fixedly provided with a feeding motor, the axial direction of an output shaft of the feeding motor is perpendicular to the first transmission shaft, a worm and gear transmission assembly connected with the first transmission shaft and the feeding motor is arranged between the output shaft and the first transmission shaft, and the worm and gear transmission.

As a further optimization or improvement of the present solution.

The driving part comprises a vertically arranged square frame and a vertically arranged square cover plate, the interface shapes of the two square cover plates are consistent, the cover plate is fixedly connected with the mounting frame, the cover plate is positioned at one end of the square frame and is arranged at a distance from the square frame, the cover plate is fixedly connected with the square frame and forms an interlayer area between the two square frame, the inner side of the square frame is provided with a strip-shaped mounting groove matched with the square frame, the middle position of the mounting groove along the length direction is fixedly provided with a partition block, the mounting groove is internally provided with a bidirectional screw rod which is rotatably provided with an axial direction parallel to the length direction, the middle position of the bidirectional screw rod penetrates through the partition block and is positioned on the outer circular surface at one side of the partition block and is provided with a forward screw thread section, the outer circular surface at the other side is provided with a reverse screw thread section, the bidirectional screw rod, the two sliding blocks are arranged on one side of the partition block respectively, the two sliding blocks are far away from each other in the initial state, a supporting arm used for connecting the two sliding blocks is arranged between the sliding blocks and the connecting plate, one end of the supporting arm is hinged to the sliding blocks, the axial direction of a hinged shaft formed at the hinged position is parallel to the axial direction of the pipe fitting, the other end of the supporting arm is hinged to the connecting plate, and the axial direction of a hinged shaft formed at the hinged position is parallel to the axial direction of the pipe fitting.

As a further optimization or improvement of the present solution.

The specified bidirectional screw rod in the clockwise direction is a first bidirectional screw rod, a second bidirectional screw rod, a third bidirectional screw rod and a fourth bidirectional screw rod in sequence, the driving part also comprises a power source for driving the bidirectional screw rod to rotate, the power source comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft and a fourth rotating shaft which are rotatably arranged between the corners of the square frame and the cover plate, the axial directions of the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all parallel to the axial direction of the pipe fitting, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are respectively positioned at the four corners of the square frame in the clockwise direction, the rotating shaft is positioned between the end parts, close to each other, of the fourth bidirectional screw rod and the second bidirectional screw rod, the third rotating shaft is positioned between the end parts, close to each other, a first bevel gear group for connecting the first rotating shaft and the first bidirectional screw rod, the second rotating shaft and the second bidirectional screw rod, the third rotating shaft and the third bidirectional screw rod and the fourth rotating shaft and the fourth bidirectional screw rod are respectively provided with a first bevel gear group, the first bevel gear group can transmit the power on the first rotating shaft to the first bidirectional screw rod and drive the first bidirectional screw rod to rotate/can transmit the power on the second rotating shaft to the second bidirectional screw rod and drive the second bidirectional screw rod to rotate/can transmit the power on the third rotating shaft to the third bidirectional screw rod and drive the third bidirectional screw rod to rotate/can transmit the power on the fourth rotating shaft to the fourth bidirectional screw rod and drive the fourth bidirectional screw rod to rotate.

As a further optimization or improvement of the present solution.

The power source further comprises a first synchronous belt transmission assembly and a second synchronous belt transmission assembly which are arranged on the interlayer region side by side, the first synchronous belt transmission assembly comprises belt wheels A which are respectively sleeved on the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft and a belt A which is wound on the four belt wheels A to form a closed loop, the belt wheels A are fixedly sleeved with the first rotating shaft, the belt wheels A are fixedly sleeved with the third rotating shaft, the belt wheels A are rotatably sleeved with the second rotating shaft, the belt wheels A are rotatably sleeved with the fourth rotating shaft, the cover plate is fixedly provided with a motor I, the axial direction of an output shaft of the motor I is parallel to the axial direction of the first rotating shaft, a second transmission assembly used for connecting the first motor output shaft and the first rotating shaft is arranged between the first motor output shaft and the first rotating shaft.

As a further optimization or improvement of the present solution.

The synchronous belt transmission assembly II comprises belt wheels B which are respectively sleeved on a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft and a belt B which is sleeved on the four belt wheels B to form a closed loop, the belt wheels B are fixedly sleeved with the second rotating shaft and fixedly sleeved with the fourth rotating shaft, the belt wheels B are rotatably sleeved with the first rotating shaft and rotatably sleeved with the third rotating shaft, a cover plate is fixedly provided with a second motor, the axial direction of an output shaft of the second motor is parallel to the axial direction of the second rotating shaft, a third transmission assembly used for connecting the second motor and the second rotating shaft is arranged between the output shaft of the second motor and the second rotating shaft, and the third transmission assembly can transmit power on the output shaft of the second motor to the second.

As a further optimization or improvement of the present solution.

The cutting mechanism comprises a rectangular mounting box movably arranged on the inner side of the second driving part, the length direction of the mounting box is parallel to the axial direction of the pipe fitting, the width direction of the mounting box is parallel to the corresponding side length direction of the second driving part, a main shaft capable of rotating around the axial direction of the main shaft is rotatably arranged in the mounting box, the axial direction of the main shaft is parallel to the length direction of the mounting box, the main shaft extends outwards from the end part of the mounting box, and a circular cutting blade is coaxially and fixedly sleeved on the extending end of the main shaft, the end face, close to the inner side of the second driving part, of the installation box is fixedly provided with a cutting motor which is arranged in a staggered mode with the installation box, an output shaft of the cutting motor extends into the installation box, the axial direction of the output shaft is perpendicular to the axial direction of the main shaft, a bevel gear group II used for being connected with the output shaft of the cutting motor and the main shaft is arranged between the output shaft of the cutting motor and the main shaft, and the bevel gear group II can transmit power on the output shaft of the cutting motor to the main shaft and drive.

As a further optimization or improvement of the present solution.

The pressing mechanism comprises a rectangular retainer movably arranged on the inner side of the second driving part, the length direction of the retainer is parallel to the axial direction of the pipe fitting, the width direction of the retainer is parallel to the side length direction corresponding to the second driving part, one end face of the retainer close to the inner side of the second driving part is provided with rectangular clamping grooves, the four clamping grooves are respectively positioned at four corners of the retainer, the clamping grooves penetrate through the side face of the retainer, the side face of the retainer is movably provided with a movable arm, the movable arm is fixedly connected with an L-shaped arm and an inclined arm, the L-shaped arm is positioned in the clamping grooves, the bent part of the L-shaped arm is in rotating connection and matching with the inner wall of the clamping grooves, the axial direction of a rotating shaft formed by the rotating connection and matching parts is parallel to the length direction of the retainer, the inclined arm is positioned below the side of the retainer and is fixedly connected with the end part of the L-shaped, and a pinch roller with convex grains is rotatably arranged between the two corresponding retainers in the direction parallel to the length direction of the retainers, and the axial direction of the pinch roller is parallel to the length direction of the installation box.

As a further optimization or improvement of the present solution.

The L type arm deviates from the fixed projecting direction that is provided with lug and lug of digging arm one end and draws close each other along the width direction of holder, and the lug is located the opening part of draw-in groove, it can follow the groove depth direction unsteady ejector pin of its groove depth direction and the groove depth direction of ejector pin to slide to be provided with in the draw-in groove, and the ejector pin deviates from the fixed kicking block that is provided with of draw-in groove tank bottom one end, and the kicking block is located between the tank bottom of lug and draw-in groove and kicking block and lug counterbalance, cup joint on the ejector pin and be provided with compression spring, compression spring one end is contradicted with the tank bottom of draw-in groove, the other end is.

As a further optimization or improvement of the present solution.

The other end of the supporting arm corresponding to the mounting box in the second driving part is hinged with the mounting box, the axial direction of a hinge shaft formed at the hinged joint is parallel to the axial direction of the pipe fitting, the other end of the supporting arm corresponding to the retainer in the second driving part is hinged with the mounting box, and the axial direction of the hinge shaft formed at the hinged joint is parallel to the axial direction of the pipe fitting.

As a further optimization or improvement of the present solution.

The rotary driving mechanism comprises a rotary ring, the axial line of the rotary ring coincides with the central line of the second driving part, right-angle corner supports are fixedly arranged on the mounting frame, the four corner supports are arranged at the outer sides of the rotary ring respectively, the corner supports are arranged at four right-angle corners of a square and the corners of the corner supports are arranged towards the inner side, the corners of the corner supports are fixedly provided with rotatable guide wheels, the axial direction of the guide wheels is parallel to the axial direction of the pipe fitting, the rotary ring is movably clamped in a groove of the guide wheels and can rotate around the self axial direction, and the second driving part is fixedly connected with one end face of the rotary ring.

As a further optimization or improvement of the present solution.

The rotary driving mechanism also comprises a fixed plate fixedly arranged on the mounting frame, the fixed plate is positioned above the rotary ring, a second transmission shaft axially parallel to the rotary ring is rotatably arranged on the fixed plate, the output end of the second transmission shaft is coaxially and fixedly sleeved with a driving gear, an annular driven gear ring is coaxially and fixedly arranged on one end surface of the rotating ring, which is far away from the second driving part, the driving gear is meshed with the driven gear ring, the fixed plate is fixedly provided with a rotary driving motor, the axial direction of an output shaft of the rotary driving motor is parallel to the axial direction of the second transmission shaft, a fourth transmission assembly used for connecting the output shaft of the rotary driving motor and the driving end of the second transmission shaft is arranged between the output shaft of the rotary driving motor and the driving end of the second transmission shaft, the fourth transmission assembly is in belt transmission, and the fourth transmission assembly can transmit power on the output shaft of the rotary driving motor to the second transmission shaft and drive the second transmission shaft to rotate.

As a further optimization or improvement of the present solution.

The surrounding cutting device also comprises a via hole slip ring component of which the input end is electrically connected with the main power supply and the output end is respectively electrically connected with the cutting motor and the motor in the second driving part, the via hole slip ring component comprises an annular movable part sleeved outside the second driving part and a fixed part fixedly connected with the mounting rack, the movable part is arranged coaxially with the pipe fitting, is fixedly connected with the second driving part and can synchronously rotate along with the second driving part, the fixed part is positioned at the bottom of the movable part and is in sliding, abutting and electric connection with the movable part, the output end of the movable part is in electric connection with the cutting motor and the motor in the second driving part, the input and the main power electricity of fixed part be connected, the outside cover of activity portion and fixed part is equipped with insulating boot and mounting bracket fixed connection, the central point of insulating boot puts to offer the uncovered that is used for the pipe fitting to pass.

Compared with the prior art, the pipe fitting feeding device has the advantages of ingenious structure, simple principle and convenience in operation and use, the pipe fittings can be clamped and positioned by the oppositely arranged conveying belts, the intermittent operation of the conveying belts can enable the pipe fittings to be automatically fed, the automation degree is high, the pipe fittings are circularly cut by the two cutting blades, namely the cutting blades can rotate around the axial direction of the cutting blades and rotate around the axial direction of the pipe fittings, the cutting blades move close to each other to achieve radial feeding, the flatness of the cut end face is high, repeated finishing is not needed, and waste of pipe fitting materials is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a matching view of the clamping and feeding device and the mounting frame.

Fig. 3 is a schematic structural view of the clamping and feeding device.

Fig. 4 is a schematic structural view of the holding member.

Fig. 5 is a partial structural view of the clamping member.

Fig. 6 is a partial structural view of the holding member.

Fig. 7 is a partial structural view of the holding member.

Fig. 8 is a schematic structural view of the driving part.

Fig. 9 is a partial structural view of the driving part.

Fig. 10 is a partial structural view of the driving part.

Fig. 11 is a partial structural view of the driving part.

Fig. 12 is a partial structural view of the driving part.

Fig. 13 is a view showing the engagement of the driving member with the holding member.

Fig. 14 is a view of the drive assembly in cooperation with a cutting mechanism, a hold down mechanism, a rotary drive mechanism, and a via slip ring assembly.

Fig. 15 is a view showing the cooperation of the driving unit with the cutting mechanism and the pressing mechanism.

Fig. 16 is a schematic structural view of the cutting mechanism.

Fig. 17 is a partial structural view of the cutting mechanism.

Fig. 18 is a schematic structural view of the pressing mechanism.

Fig. 19 is a partial structural schematic view of the pressing mechanism.

Fig. 20 is a view showing the combination of the rotary drive mechanism and the drive member.

Fig. 21 is a schematic structural view of the rotation driving mechanism.

Fig. 22 is a schematic structural view of the rotation driving mechanism.

Figure 23 is a mating view of a via slip ring assembly with a drive member.

Fig. 24 is a mating view of a via slip ring assembly and a drive member.

Labeled as: 100. A mounting frame;

200. clamping the feeding device; 210. a clamping member; 211. mounting a plate; 212. a connecting plate; 213a, a driving roller; 213b, a driven drum; 213c, transition drum; 214. a conveyor belt; 215. a fixed mount; 216. a first transmission shaft; 217. a first transmission component; 218. a feeding motor; 219. a worm gear drive assembly; 220. a drive member; 221. a square frame; 221a, a mounting groove; 221b, a partition block; 222. a cover plate; 222a, an interlayer region; 223. a bidirectional screw rod; 224. a slider; 225. a support arm; 230. a power source; 231. a first rotating shaft; 232. a second rotating shaft; 233. a rotating shaft III; 234. a rotating shaft IV; 235. a bevel gear set I; 236. a first synchronous belt transmission component; 237. a synchronous belt transmission assembly II; 238a, a motor I; 238b, a second transmission component; 239a, a motor II; 239b, a third transmission component;

300. a circular cutting device; 310. a cutting mechanism; 311. installing a box; 312. a main shaft; 313. a cutting blade; 314. cutting the motor; 315. a bevel gear set II; 320. a hold-down mechanism; 321. a holder; 322. a card slot; 323. a movable arm; 324. a pinch roller; 325. a bump; 326. a top rod; 327. a top block; 328. a compression spring; 330. a drive member; 340. a rotation driving mechanism; 341. a rotating ring; 342. a corner bracket; 343. a guide wheel; 344. a fixing plate; 345. a second transmission shaft; 346. a driving gear; 347. a driven gear ring; 348. a rotary drive motor; 349. a fourth transmission component; 350. a via slip ring assembly; 351. a movable portion; 352. a fixed part; 353. and an insulating cover.

Detailed Description

Referring to fig. 1 to 24, the double-saw circular cutting machine for stainless steel pipe machining comprises a mounting frame 100, two clamping and feeding devices 200 and a circular cutting device 300, wherein the clamping and feeding devices 200 are arranged in two and are fixedly mounted on the mounting frame 100 in a front-back arrangement manner, the circular cutting device 300 is also fixedly mounted on the mounting frame 100, one clamping and feeding device 200 is positioned between the other clamping and feeding device 200 and the circular cutting device 300, the middle positions of the clamping and feeding devices 200 and the circular cutting device 300 can allow a pipe to pass through, the clamping and feeding devices 200 can guide and clamp the penetrated pipe and feed the pipe to the circular cutting device 300, the circular cutting device 300 can cut the penetrated pipe, the clamping and feeding devices 200 comprise clamping parts 210 and square frame-shaped driving parts 220, the clamping parts 210 are arranged on the inner sides of the driving parts 220, the clamping components 210 are symmetrically provided with one group in the up-down direction and the left-right direction, the pipe can pass through between the two groups of clamping components 210, the driving component 220 can drive each group of clamping components 210 to move close to each other and the pipe can be guided and clamped, the surrounding cutting device 300 comprises a cutting mechanism 310, a pressing mechanism 320, a driving component 330 and a rotary driving mechanism 340, the cutting mechanism 310 is arranged at the inner side of the driving component 330 and is symmetrically provided with two, the pressing mechanism 320 is arranged at the inner side of the driving component 330 and is symmetrically provided with two, the driving component 330 can drive the cutting mechanism 310 to move close to each other and can drive the pressing mechanism 320 to move close to each other and clamp the pipe, the rotary driving mechanism 340 can drive the driving component 330 and the cutting mechanism 310 and the pressing mechanism 320 to rotate synchronously around the axial direction of the pipe, meanwhile, the cutting mechanism 310 is started to operate to realize the surrounding cutting of the pipe.

Specifically, the driving member 220 of the clamping and feeding device 200 is configured and shaped in accordance with the driving member of the circular cutting device 300, and the center lines of the two coincide, the driving member 220 of the clamping and feeding device 200 is fixedly connected with the mounting block 100 and defines the driving member 220 as a first driving member, the driving member 330 of the circular cutting device 300 is rotatably connected and matched with the mounting block 100 through the rotary driving mechanism 340 and defines the driving member 330 as a second driving member.

In the process of cutting the large-diameter pipe, the first driving part drives the clamping part 210 to move away from each other and reserve a space for inserting the pipe, the second driving part drives the two cutting mechanisms 310 to move away from each other and drives the two pressing mechanisms 320 to move away from each other and reserve a space for inserting the pipe, then the pipe is inserted into the two clamping and feeding devices 200 and the surrounding cutting device 300, then the first driving part drives the clamping part 210 to move close to each other and clamp the pipe, the second driving part drives the cutting mechanisms 310 to move close to each other and clamp the pipe, respectively, the pressing mechanisms 320 to move close to each other and clamp the pipe, and then the rotary driving mechanism 340 is started, and the rotary driving mechanism 340 drives the second driving part to rotate around the axial direction of the pipe, the cutting mechanism 310 and the pressing mechanism 320 will rotate around the axial direction of the pipe, the cutting mechanism 310 is started and performs circular cutting on the pipe, meanwhile, the second driving component drives the cutting mechanism 310 to approach each other and move slowly to achieve radial feeding until the cutting processing on the pipe is completed, and thereafter, the clamping component 210 will push the pipe to move forward to achieve automatic feeding, so that the pipe can be cut continuously around the cutting device 300.

The clamping component 210 comprises a rectangular mounting plate 211, the length direction of the mounting plate 211 is parallel to the axial direction of the pipe fitting, the mounting plate 211 is provided with two mounting plates which are arranged at intervals, the mounting plate 211 is positioned at the middle position of the inner side of the square driving component 220 and is arranged perpendicular to the corresponding side length, the middle position of one side of the two mounting plates 211 close to the driving component 220 is fixedly provided with a connecting plate 212 for connecting the two mounting plates, a driving roller 213a, a driven roller 213b and a transition roller 213 which are equal in diameter are rotatably arranged between the two mounting plates 211, the axial directions of the driving roller 213a, the driven roller 213b and the transition roller 213 are all parallel to the interval direction of the two mounting plates 211, the driving roller 213a is positioned at one end of the mounting plate 211 in the length direction, the driven roller 213b is positioned at the other end of the mounting plate 211 in the length direction, the transition roller 213c is provided with a plurality of driving rollers 213 The conveying belts 214 are driven by the first driving part 220 to move close to each other, the pipe fitting is guided and clamped, the conveying belts 214 are driven to operate, the pipe fitting can be pushed towards the surrounding cutting device 300, and automatic feeding is achieved.

Specifically, in order to drive the conveyor belt 214 to operate, a fixing frame 215 which is arranged in a staggered manner with the first driving component is fixedly arranged on the connecting plate 212, a first transmission shaft 216 which is axially parallel to the axial direction of the driving roller 213a is rotatably arranged on the fixing frame 215, the end part of the first transmission shaft 216 extends to the outer side of the mounting plate 211, a first transmission assembly 217 which is used for connecting the end part of the first transmission shaft 216 and the driving end of the driving roller 213a is arranged between the end part of the first transmission shaft 216 and the driving end of the driving roller 213a, the first transmission assembly 217 is a belt transmission assembly and can transmit the power of the first transmission shaft 216 to the driving roller 213a and drive the driving roller 213a to rotate, in order to drive the first transmission shaft 216 to rotate, a feeding motor 218 is fixedly arranged on the fixing frame 215, the output shaft of the feeding motor 218 is axially perpendicular to the first transmission shaft, the worm gear assembly 219 can transmit the power from the output shaft of the feeding unit 218 to the first transmission shaft 216 and drive the first transmission shaft 216 to rotate.

In the working process of the clamping components 210, the first working stage is to guide and clamp the pipe fittings, which is specifically characterized in that the first driving component drives the connecting plates 212 which are symmetrically arranged in pairs to move close to each other, the whole of the symmetrically arranged clamping components 210 move close to each other, the conveying belt 214 guides and clamps the pipe fittings which pass through the conveying belt 214 until the conveying belt 214 tightly collides with the pipe fittings, the automatically guide and clamp the pipe fittings can be realized because the symmetrically arranged clamping components 210 synchronously move close to each other, the second working stage is to feed the pipe fittings, which is specifically characterized in that the feeding motor 218 is started, the worm gear transmission component 219 transmits the power on the output shaft of the feeding motor 218 to the first transmission shaft 216 and drives the first transmission shaft 216 to rotate around the self axial direction, the power on the first transmission shaft 216 of the first transmission component 217 is transmitted to the first driving roller 213a and drives the driving roller 213a to rotate around the self axial direction, the driving roller 213a, the driven roller 213b and the transition roller 213c cooperate to operate the conveyer belt 214, and the conveyer belt 214 and the pipe generate friction force and drive the pipe to move towards the encircling cutting device 300 by the friction force, so that automatic feeding is realized.

The driving part 220 comprises a vertically arranged square frame 221 and a vertically arranged square frame cover 222, the interface shapes of the two square frame cover 221 and the cover 222 are the same, the cover 222 is fixedly connected with the mounting frame 100, the cover 222 is positioned at one end of the square frame 221 and is arranged at a distance from the square frame 221, the cover 222 is fixedly connected with the square frame 221, an interlayer region 222a is formed between the cover 222 and the square frame 221, a strip-shaped mounting groove 221a matched with the square frame 221 is formed in the inner side of the square frame 221, a partition block 221b is fixedly arranged at the middle position of the mounting groove 221a along the length direction, a bidirectional screw rod 223 axially parallel to the length direction is rotatably arranged in the mounting groove 221a, the middle position of the bidirectional screw rod 223 penetrates through the partition block 221b, a forward thread section is formed on the outer circular surface at one side of the partition block 221b, a reverse thread section is formed on the outer circular, the sliding block 224 and the mounting groove 221a form a sliding guiding fit along the axial direction of the bidirectional screw rod 223, the sliding block 224 is provided with two blocks and is respectively positioned at one side of the partition block 221b, the two sliding blocks 224 are arranged far away from each other in an initial state, a supporting arm 225 for connecting the sliding block 224 and the connecting plate 212 is arranged between the two blocks, one end of the supporting arm 225 is hinged with the sliding block 224, the axial direction of a hinged shaft formed at the hinged position is parallel to the axial direction of the pipe fitting, the other end of the hinged shaft formed at the hinged position is hinged with the connecting plate 212, the axial direction of the hinged shaft is parallel to the axial direction of the pipe fitting, the opening and closing angle between the two supporting arms 225 is gradually reduced by driving the sliding blocks 224 to approach each other, and.

Specifically, in order to drive the symmetrically arranged two-way screws 223 to synchronously rotate, it is specified that the two-way screws 223 in the clockwise direction are a first two-way screw, a second two-way screw, a third two-way screw and a fourth two-way screw in sequence, that is, the first two-way screw and the third two-way screw need to be driven to synchronously rotate, and the second two-way screw and the fourth two-way screw need to be driven to synchronously rotate, for this purpose, the driving part 220 further comprises a power source 230 for driving the two-way screws 223 to rotate, the power source 230 comprises a first rotating shaft 231, a second rotating shaft 232, a third rotating shaft 233 and a fourth rotating shaft 234 which are rotatably arranged between the square frame 221 and the corner of the cover plate 222, and the axial directions of the first rotating shaft 231, the second rotating shaft 232, the third rotating shaft 233 and the fourth rotating shaft 234 are all parallel to the axial direction of the pipe fitting, the first rotating shaft 231, the, the second rotating shaft 232 is located between the end parts of the first bidirectional screw rod and the second bidirectional screw rod, the third rotating shaft 233 is located between the end parts of the second bidirectional screw rod and the third bidirectional screw rod, the fourth rotating shaft 234 is located between the end parts of the third bidirectional screw rod and the fourth bidirectional screw rod, a bevel gear set 235 for connecting the first rotating shaft 231 and the first bidirectional screw rod, the second rotating shaft 232 and the second bidirectional screw rod, the third rotating shaft 233 and the third bidirectional screw rod, and the fourth rotating shaft 234 and the fourth bidirectional screw rod are all provided with a bevel gear set 235, the bevel gear set 235 can transmit the power on the first rotating shaft 231 to the first bidirectional screw rod and drive the first bidirectional screw rod to rotate/can transmit the power on the second rotating shaft 232 to the second bidirectional screw rod and drive the second bidirectional screw rod to rotate/can transmit the power on the third rotating shaft 233 to the third bidirectional screw rod and drive the third bidirectional screw rod to rotate/can transmit the power on the fourth rotating shaft 234 to the fourth bidirectional And the first two-way screw rod and the second two-way screw rod are synchronously rotated by driving the first rotating shaft 231 and the third rotating shaft 233 to synchronously rotate, and the second two-way screw rod and the fourth two-way screw rod are synchronously rotated by driving the second rotating shaft 232 and the fourth rotating shaft 234 to synchronously rotate.

More specifically, in order to drive the first rotating shaft 231 and the third rotating shaft 233 to rotate synchronously or drive the second rotating shaft 232 and the fourth rotating shaft 234 to rotate synchronously, the power source 230 further includes a first synchronous belt transmission assembly 236 and a second synchronous belt transmission assembly 237 which are arranged in parallel in the interlayer region 222a, the first synchronous belt transmission assembly 236 includes belt pulleys a respectively sleeved on the first rotating shaft 231, the second rotating shaft 232, the third rotating shaft 233 and the fourth rotating shaft 234 and a belt a wound around the four belt pulleys a to form a closed loop, the belt pulley a is fixedly sleeved on the first rotating shaft 231, the belt pulley a is fixedly sleeved on the third rotating shaft 233, the belt pulley a is rotatably sleeved on the second rotating shaft 232, the belt pulley a is rotatably sleeved on the fourth rotating shaft 234, the cover plate 222 is fixedly provided with a first motor 238a, an axial direction of an output shaft of the first motor 238a is parallel to an axial direction of the first rotating shaft 231, a second transmission assembly 238b for connecting, the second transmission assembly 238b can transmit the power on the output shaft of the first motor 238a to the first rotating shaft 231 and drive the first rotating shaft 231 to rotate, the first motor 238a drives the first rotating shaft 231 to rotate, and the first synchronous transmission assembly 236 realizes the synchronous rotation of the first rotating shaft 231 and the third rotating shaft 233.

More specifically, the second synchronous belt drive assembly 237 includes a belt pulley B sleeved on the first rotating shaft 231, the second rotating shaft 232, the third rotating shaft 233 and the fourth rotating shaft 234, respectively, and a belt B sleeved on the four belt pulleys B to form a closed loop, the belt pulley B is fixedly sleeved on the second rotating shaft 232, the belt pulley B is fixedly sleeved on the fourth rotating shaft 234, the belt pulley B is rotatably sleeved on the first rotating shaft 231, the belt pulley B is rotatably sleeved on the third rotating shaft 233, the cover plate 222 is fixedly provided with a second motor 239a, the axial direction of the output shaft of the second motor 239a is parallel to the axial direction of the second rotating shaft 232, a third transmission component 239b for connecting the output shaft of the second motor 239a and the second rotating shaft 232 is arranged between the output shaft of the second motor 239a and the second rotating shaft 232, the third transmission component 239b can transmit the power on the output shaft of the second motor 239a to the second rotating shaft 232 and drive the second rotating shaft 232 to rotate, the second rotating shaft 232 is driven to rotate by the second motor 239a, and the second rotating shaft 232 and the fourth rotating shaft 234 synchronously rotate through the second synchronous belt transmission assembly 237.

In the working process of the driving part 220, when the symmetrically arranged clamping parts 210 need to be driven to move close to each other to guide and clamp the pipe fitting, the first motor 238a is started, the second transmission assembly 238b transmits the power on the output shaft of the first motor 238a to the first rotating shaft 231 and drives the first rotating shaft 231 to rotate, the first synchronous belt transmission assembly 236 drives the first rotating shaft 231 and the third rotating shaft 233 to rotate synchronously, so as to drive the first bidirectional screw rod and the third bidirectional screw rod to rotate synchronously, the two sliders 224 on the first bidirectional screw rod slide close to each other, the two sliders 224 on the third bidirectional screw rod slide close to each other, so that the two corresponding clamping parts 210 move close to each other to guide and clamp the pipe fitting, meanwhile, the second motor 239a is started, the third transmission assembly 239b transmits the power on the output shaft of the second motor 239a to the second rotating shaft 232 and drives the second rotating shaft 232 to rotate, the second synchronous belt drive assembly 237 drives the second rotating shaft 232 and the fourth rotating shaft 234 to synchronously rotate, so that the second bidirectional screw rod and the fourth bidirectional screw rod are driven to synchronously rotate, the two sliding blocks 224 on the second bidirectional screw rod slide close to each other, the two sliding blocks 224 on the fourth bidirectional screw rod slide close to each other, the two corresponding clamping parts 210 move close to each other to guide and clamp the pipe fitting, and the conveying belt 214 finishes guide and clamping processing of the pipe fitting.

The cutting mechanism 310 comprises a rectangular mounting box 311 movably arranged on the inner side of the second driving part, the length direction of the mounting box 311 is parallel to the axial direction of the pipe fitting, the width direction of the mounting box 311 is parallel to the side length direction corresponding to the second driving part, a main shaft 312 capable of rotating around the self axial direction is rotatably arranged in the mounting box 311, the axial direction of the main shaft 312 is parallel to the length direction of the mounting box 311, the main shaft 312 extends outwards from the end part of the mounting box 311, a circular cutting blade 313 is coaxially and fixedly sleeved on the extending end, in order to be capable of driving the cutting blade 313 to rotate around the self axial direction at a high speed, a cutting motor 314 arranged in a staggered mode with the main shaft is fixedly arranged on one end surface of the mounting box 311 close to the inner side of the second driving part, an output shaft of the cutting motor 314 extends into the mounting box 311, the axial direction of the output shaft is perpendicular to the axial direction of, the bevel gear set 315 can transmit power on an output shaft of the cutting motor 314 to the main shaft 312 and drive the main shaft 312 to rotate, the cutting motor 314 drives the cutting blade 313 to rotate at a high speed, and the cutting blade 313 holds the pipe fitting tightly for cutting.

The pressing mechanism 320 comprises a rectangular holder 321 movably arranged on the inner side of the second driving part, the length direction of the holder 321 is parallel to the axial direction of the pipe fitting, the width direction of the holder 321 is parallel to the side length direction corresponding to the second driving part, one end surface of the holder 321 close to the inner side of the second driving part is provided with four rectangular clamping grooves 322, the four clamping grooves 322 are respectively positioned at four corners of the holder 321, the clamping grooves 322 penetrate through the side surface of the holder 321, the side surface of the holder 321 is movably provided with a movable arm 323, and the movable arm 323 is fixedly connected by an L-shaped arm and an inclined arm, wherein the L-shaped arm is positioned in the clamping groove 322 and the bending part of the L-shaped arm is in rotating connection and matching with the inner wall of the clamping groove 322, the axial direction of a rotating shaft formed at the rotating connection and matching part is parallel to the length direction of the holder, the distance between the symmetrically arranged inclined arms gradually increases along the direction from the side length position of the second driving part to the center position, a pressing wheel 324 with convex grains is rotatably arranged between the two corresponding retainers 321 parallel to the length direction of the retainers 321, the axial direction of the pressing wheel 324 is parallel to the length direction of the mounting box 311, and the pressing wheel 324 is abutted against the pipe fitting, so that the pipe fitting is clasped.

Specifically, in order to enable the pressing wheel 324 to hold the pipe fitting tightly, one end of the L-shaped arm, which is far away from the movable arm, is fixedly provided with a convex block 325, the protruding direction of the convex block 325 is mutually closed along the width direction of the retainer 321, the convex block 325 is positioned at the opening of the clamping groove 322, the clamping groove 322 is slidably provided with a push rod 326 which can float along the groove depth direction, the axial direction of the push rod 326 is parallel to the groove depth direction of the clamping groove 322, one end of the push rod 326, which is far away from the groove bottom of the clamping groove 322, is fixedly provided with a top block 327, the top block 327 is positioned between the convex block 325 and the groove bottom of the clamping groove 322 and is abutted against the convex block 327, the push rod 326 is sleeved with a compression spring 328, one end of the compression spring 328 is abutted against the groove bottom of the clamping groove 322, the other end of the compression spring is abutted against the top block 327, the elastic, thereby rotating the inclined arms of the movable arms 323 about their rotational axes toward each other and causing the two pinch rollers 324 to grip the pipe.

In order to drive the cutting mechanisms 310 to move close to each other and to drive the pressing mechanisms 320 to move close to each other, the other ends of the supporting arms corresponding to the stabilizer boxes 311 of the second driving part are hinged to the installation boxes 311, the axial direction of the hinge shafts formed at the hinged joints is parallel to the axial direction of the pipe fitting, the other ends of the supporting arms corresponding to the retainers 321 of the second driving part are hinged to the installation boxes 311, the axial direction of the hinge shafts formed at the hinged joints is parallel to the axial direction of the pipe fitting, the cutting mechanisms 310 can be driven to move close to each other and the cutting blades 313 can be abutted against the pipe fitting by the second driving part, and the pressing mechanisms 320 can be driven to move close to each other and the pressing wheels 324 can be abutted against the pipe fitting by the second driving part.

During the operation of the circular cutting device 300, firstly, the oppositely disposed cutting mechanisms 310 driven by the second driving component move synchronously close to each other until the cutting blades 313 contact the pipe, then, the oppositely disposed pressing mechanisms 320 driven by the second driving component move synchronously close to each other until the pressing wheels 324 collide with the pipe, then, the rotary driving mechanism 340 starts to operate, the rotary driving mechanism 340 drives the second driving component to rotate integrally around the axial direction of the pipe, the second driving component drives the cutting mechanisms 310 and the pressing mechanisms 320 to rotate integrally and synchronously around the axial direction of the pipe, during this process, the cutting motor 314 drives the cutting blades 313 to rotate at a high speed around the axial direction thereof, the cutting blades 313 perform circular cutting processing on the pipe, and at the same time, the oppositely disposed cutting mechanisms 310 driven by the second driving component move slowly close to each other, make cutting blade 313 feed along the radial of pipe fitting, until cutting blade 313 cuts off the pipe fitting, adopt the significance of this kind of cutting scheme in that, on the one hand, cutting blade 313 carries out the surrounding type cutting to the pipe fitting, can make the cutting terminal surface flush, and the efficiency of cutting is high moreover, and on the other hand, hold in the palm tightly and also rotate around the pipe fitting to the pipe fitting, can keep the stability of pipe fitting, prevent to beat, further promote the roughness of cutting terminal surface.

In order to drive the second driving part to rotate integrally around the axial direction of the pipe, the rotary driving mechanism 340 includes a rotating ring 341 whose axis coincides with the center line of the second driving part, a right-angle bracket 342 is fixedly disposed on the mounting bracket 100, the four corner brackets 342 are disposed outside the rotating ring 341 and are respectively located at the four right angles of the square, the corner brackets 342 are disposed inward at the corners of the corner brackets 342, the corners of the corner brackets 342 are fixedly mounted in a rotatable guide wheel 343, and the axial direction of the guide wheel 343 is parallel to the axial direction of the pipe, the rotating ring 341 is movably clamped in the groove of the guide wheel 343 and the rotating ring 341 can rotate around its own axis, the second driving member is fixedly connected to one end surface of the rotating ring 341, and the second driving member is rotationally driven by driving the rotating ring 341 to rotate.

Specifically, in order to be able to drive the rotation ring 341 to rotate, the rotation driving mechanism 340 further includes a fixing plate 344 fixedly disposed on the mounting frame 100, the fixing plate 344 is located above the rotation ring 341, a second transmission shaft 345 axially parallel to the axial direction of the rotation ring 341 is rotatably disposed on the fixing plate 344, a driving gear 346 is coaxially and fixedly disposed at an output end of the second transmission shaft 345, an annular driven gear ring 347 is coaxially and fixedly disposed on an end surface of the rotation ring 341 facing away from the second driving part, the driving gear 346 is engaged with the driven gear ring 347, in order to be able to drive the second transmission shaft 345 to rotate, a rotation driving motor 348 is fixedly disposed on the fixing plate 344, an output shaft of the rotation driving motor 348 is axially parallel to the axial direction of the second transmission shaft 345, a fourth transmission assembly 349 for connecting the output shaft of the rotation driving, the fourth driving component 349 is a belt drive, the fourth driving component 349 can transmit the power on the output shaft of the rotary driving motor 348 to the second transmission shaft 345 and drive the second transmission shaft 345 to rotate, and the rotary ring 341 can be driven to rotate around the self-axial direction by the rotary driving motor 348, so as to drive the second driving part to rotate integrally.

In the working process of the rotary driving mechanism 340, the rotary driving motor 348 is started, the transmission assembly is four 349, the power on the output shaft of the rotary driving motor 348 is transmitted to the second transmission shaft 345 and drives the second transmission shaft 345 to rotate, the second transmission shaft 345 drives the driving gear 346 to rotate, the driving gear 346 drives the driven gear ring 347 to rotate, the driven gear ring 347 drives the rotary ring 341 to rotate, the rotary ring 341 drives the second driving part to rotate, and therefore the cutting mechanism 310 and the pressing mechanism 320 can move around the pipe fitting.

As a more preferable solution of the present invention, since the cutting motor 314 and the motor in the second driving part both need to rotate around the axial direction of the pipe, in order to supply power to the cutting motor 314 and the motor in the second driving part, the surrounding cutting device 300 further includes a via hole slip ring assembly 350 having an input end electrically connected to the main power supply and an output end electrically connected to the cutting motor 314 and the motor in the second driving part, respectively, the via hole slip ring assembly 350 includes an annular movable portion 351 sleeved outside the second driving part, a fixed portion 352 fixedly connected to the mounting bracket 100, the movable portion 351 is arranged coaxially with the pipe, the movable portion 351 is fixedly connected to the second driving part and can rotate synchronously therewith, the fixed portion 352 is located at the bottom of the movable portion 351 and is in sliding abutting electrical connection therewith, the output end of the movable portion 351 is electrically connected to the cutting motor 314 and the motor in the second driving part, the input and the total power supply electricity of fixed part 352 be connected, in order to protect movable part 351 and fixed part 352 and avoid the electric leakage, the outside cover of movable part 351 and fixed part 352 is equipped with insulating boot 353 and mounting bracket 100 fixed connection, and the central point of insulating boot 353 puts and offers the uncovered that is used for the pipe fitting to pass, and the meaning of this scheme of adoption lies in, conveniently distributes to cutting the motor among motor 314 and the second driver part.

Claims (10)

1. A two saws encircle cutting machine for stainless steel pipe fitting processing which characterized in that: the pipe fitting cutting device comprises a mounting frame, two clamping and feeding devices and a surrounding cutting device, wherein the two clamping and feeding devices are arranged in a front-back manner and are fixedly mounted on the mounting frame, the surrounding cutting device is also fixedly mounted on the mounting frame, one clamping and feeding device is positioned between the other clamping and feeding device and the surrounding cutting device, the middle positions of the clamping and feeding devices and the surrounding cutting device can allow a pipe fitting to pass through, the clamping and feeding devices can guide and clamp the penetrated pipe fitting and feed the pipe fitting towards the surrounding cutting device, the surrounding cutting device can cut the passed pipe fitting, the clamping and feeding devices comprise clamping components and square frame-shaped driving components, the clamping components are arranged on the inner side of the driving components, the clamping components are symmetrically arranged in a group up and down and are symmetrically arranged in a group left-right manner, the pipe fitting can pass through between the two groups of clamping components, and the driving components can, the encircling cutting device comprises a cutting mechanism, a pressing mechanism, a driving part and two rotary driving mechanisms, wherein the cutting mechanism is arranged on the inner side of the driving part and is symmetrically provided with two pressing mechanisms, the two pressing mechanisms are arranged on the inner side of the driving part and are symmetrically provided with two pressing mechanisms, the driving part can drive the cutting mechanism to move close to each other and can drive the pressing mechanisms to move close to each other and enable the pressing mechanisms to tightly hold the passing pipe fitting, and the rotary driving mechanisms can drive the driving part, the cutting mechanism and the pressing mechanisms to synchronously rotate around the axial direction of the pipe fitting;

the driving part in the clamping and feeding device and the driving part in the surrounding cutting device are consistent in structure and shape, the center lines of the driving part and the driving part are coincident, the driving part in the clamping and feeding device is fixedly connected with the mounting frame and is defined as a first driving part, the driving part in the surrounding cutting mechanism is in rotating connection and matching with the mounting frame through a rotating driving mechanism, and the driving part is defined as a second driving part.

2. The double saw loop cutting machine for stainless steel pipe machining according to claim 1, wherein: the clamping component comprises a rectangular mounting plate, the length direction of the mounting plate is parallel to the axial direction of the pipe fitting, the mounting plate is provided with two mounting plates which are arranged at intervals, the mounting plates are positioned at the middle position of the inner side of the square driving component and are arranged perpendicular to the corresponding side length, the middle position of one side of the two mounting plates, which is close to the driving component, is fixedly provided with a connecting plate for connecting the two mounting plates, a driving roller, a driven roller and a transition roller which are arranged between the two mounting plates and have the same diameter are rotatably arranged, the axial directions of the driving roller, the driven roller and the transition roller are all parallel to, the driven roller is located the other end of mounting panel along length direction, and the transition cylinder is provided with a plurality ofly and closely arranges between initiative cylinder and driven roller, and the wraparound is provided with the transportation area and the transportation area that constitute closed loop and has seted up anti-skidding line between initiative cylinder and the driven roller on.

3. The double saw loop cutting machine for stainless steel pipe machining according to claim 2, wherein: the connecting plate is fixedly provided with a fixing frame staggered with the first driving part, a first transmission shaft axially parallel to the axial direction of the driving roller is arranged on the fixing frame in a rotating mode, the end portion of the first transmission shaft extends to the outer side of the mounting plate, a first transmission assembly connected with the first transmission shaft and the driving end of the driving roller is arranged between the end portion of the first transmission shaft and the driving end of the driving roller, the first transmission assembly is a belt transmission assembly and can transmit the power of the first transmission shaft to the driving roller and drive the driving roller to rotate, the fixing frame is fixedly provided with a feeding motor, the axial direction of an output shaft of the feeding motor is perpendicular to the first transmission shaft, a worm and gear transmission assembly connected with the first transmission shaft and the feeding motor is arranged between the output shaft and the first transmission shaft, and the worm and gear transmission.

4. The double saw loop cutting machine for stainless steel pipe machining according to claim 1, wherein: the driving part comprises a vertically arranged square frame and a vertically arranged square cover plate, the interface shapes of the two square cover plates are consistent, the cover plate is fixedly connected with the mounting frame, the cover plate is positioned at one end of the square frame and is arranged at a distance from the square frame, the cover plate is fixedly connected with the square frame and forms an interlayer area between the two square frame, the inner side of the square frame is provided with a strip-shaped mounting groove matched with the square frame, the middle position of the mounting groove along the length direction is fixedly provided with a partition block, the mounting groove is internally provided with a bidirectional screw rod which is rotatably provided with an axial direction parallel to the length direction, the middle position of the bidirectional screw rod penetrates through the partition block and is positioned on the outer circular surface at one side of the partition block and is provided with a forward screw thread section, the outer circular surface at the other side is provided with a reverse screw thread section, the bidirectional screw rod, the two sliding blocks are arranged on one side of the partition block respectively, the two sliding blocks are far away from each other in the initial state, a supporting arm used for connecting the two sliding blocks is arranged between the sliding blocks and the connecting plate, one end of the supporting arm is hinged to the sliding blocks, the axial direction of a hinged shaft formed at the hinged position is parallel to the axial direction of the pipe fitting, the other end of the supporting arm is hinged to the connecting plate, and the axial direction of a hinged shaft formed at the hinged position is parallel to the axial direction of the pipe fitting.

5. The double saw loop cutting machine for stainless steel pipe machining according to claim 4, wherein: the specified bidirectional screw rod in the clockwise direction is a first bidirectional screw rod, a second bidirectional screw rod, a third bidirectional screw rod and a fourth bidirectional screw rod in sequence, the driving part also comprises a power source for driving the bidirectional screw rod to rotate, the power source comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft and a fourth rotating shaft which are rotatably arranged between the corners of the square frame and the cover plate, the axial directions of the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all parallel to the axial direction of the pipe fitting, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are respectively positioned at the four corners of the square frame in the clockwise direction, the rotating shaft is positioned between the end parts, close to each other, of the fourth bidirectional screw rod and the second bidirectional screw rod, the third rotating shaft is positioned between the end parts, close to each other, a first bevel gear group for connecting the first rotating shaft and the first bidirectional screw rod, the second rotating shaft and the second bidirectional screw rod, the third rotating shaft and the third bidirectional screw rod and the fourth rotating shaft and the fourth bidirectional screw rod are respectively provided with a first bevel gear group, the first bevel gear group can transmit the power on the first rotating shaft to the first bidirectional screw rod and drive the first bidirectional screw rod to rotate/can transmit the power on the second rotating shaft to the second bidirectional screw rod and drive the second bidirectional screw rod to rotate/can transmit the power on the third rotating shaft to the third bidirectional screw rod and drive the third bidirectional screw rod to rotate/can transmit the power on the fourth rotating shaft to the fourth bidirectional screw rod and drive the fourth bidirectional screw rod to rotate.

6. The double saw loop cutting machine for stainless steel pipe machining according to claim 5, wherein: the power source further comprises a first synchronous belt transmission assembly and a second synchronous belt transmission assembly which are arranged on the interlayer region side by side, the first synchronous belt transmission assembly comprises belt wheels A which are respectively sleeved on the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft and a belt A which is wound on the four belt wheels A to form a closed loop, the belt wheels A are fixedly sleeved with the first rotating shaft, the belt wheels A are fixedly sleeved with the third rotating shaft, the belt wheels A are rotatably sleeved with the second rotating shaft, the belt wheels A are rotatably sleeved with the fourth rotating shaft, the cover plate is fixedly provided with a motor I, the axial direction of an output shaft of the motor I is parallel to the axial direction of the first rotating shaft, a second transmission assembly used for connecting the first motor output shaft and the first rotating shaft is arranged between the first motor output shaft and the first rotating shaft.

7. The double saw loop cutting machine for stainless steel pipe machining according to claim 6, wherein: the synchronous belt transmission assembly II comprises belt wheels B which are respectively sleeved on a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft and a belt B which is sleeved on the four belt wheels B to form a closed loop, the belt wheels B are fixedly sleeved with the second rotating shaft and fixedly sleeved with the fourth rotating shaft, the belt wheels B are rotatably sleeved with the first rotating shaft and rotatably sleeved with the third rotating shaft, a cover plate is fixedly provided with a second motor, the axial direction of an output shaft of the second motor is parallel to the axial direction of the second rotating shaft, a third transmission assembly used for connecting the second motor and the second rotating shaft is arranged between the output shaft of the second motor and the second rotating shaft, and the third transmission assembly can transmit power on the output shaft of the second motor to the second.

8. The double saw loop cutting machine for stainless steel pipe machining according to claim 1, wherein: the cutting mechanism comprises a rectangular mounting box movably arranged on the inner side of the second driving part, the length direction of the mounting box is parallel to the axial direction of the pipe fitting, the width direction of the mounting box is parallel to the corresponding side length direction of the second driving part, a main shaft capable of rotating around the axial direction of the main shaft is rotatably arranged in the mounting box, the axial direction of the main shaft is parallel to the length direction of the mounting box, the main shaft extends outwards from the end part of the mounting box, and a circular cutting blade is coaxially and fixedly sleeved on the extending end of the main shaft, the end face, close to the inner side of the second driving part, of the installation box is fixedly provided with a cutting motor which is arranged in a staggered mode with the installation box, an output shaft of the cutting motor extends into the installation box, the axial direction of the output shaft is perpendicular to the axial direction of the main shaft, a bevel gear group II used for being connected with the output shaft of the cutting motor and the main shaft is arranged between the output shaft of the cutting motor and the main shaft, and the bevel gear group II can transmit power on the output shaft of the cutting motor to the main shaft and drive.

9. The double saw loop cutting machine for stainless steel pipe machining according to claim 1, wherein: the pressing mechanism comprises a rectangular retainer movably arranged on the inner side of the second driving part, the length direction of the retainer is parallel to the axial direction of the pipe fitting, the width direction of the retainer is parallel to the side length direction corresponding to the second driving part, one end face of the retainer close to the inner side of the second driving part is provided with rectangular clamping grooves, the four clamping grooves are respectively positioned at four corners of the retainer, the clamping grooves penetrate through the side face of the retainer, the side face of the retainer is movably provided with a movable arm, the movable arm is fixedly connected with an L-shaped arm and an inclined arm, the L-shaped arm is positioned in the clamping grooves, the bent part of the L-shaped arm is in rotating connection and matching with the inner wall of the clamping grooves, the axial direction of a rotating shaft formed by the rotating connection and matching parts is parallel to the length direction of the retainer, the inclined arm is positioned below the side of the retainer and is fixedly connected with the end part of the L-shaped, and a pinch roller with convex grains is rotatably arranged between the two corresponding retainers in the direction parallel to the length direction of the retainers, and the axial direction of the pinch roller is parallel to the length direction of the installation box.

10. The double saw loop cutting machine for stainless steel pipe machining according to claim 9, wherein: the L-shaped arm is fixedly provided with a convex block at one end deviating from the movable arm, the convex direction of the convex block is mutually close along the width direction of the retainer, the convex block is positioned at the opening of the clamping groove, a push rod capable of floating along the groove depth direction of the clamping groove is arranged in the clamping groove in a sliding manner, the axial direction of the push rod is parallel to the groove depth direction of the clamping groove, a top block is fixedly arranged at one end deviating from the groove bottom of the clamping groove, the top block is positioned between the convex block and the groove bottom of the clamping groove and is abutted against the convex block, a compression spring is sleeved on the push rod, one end of the compression spring is abutted against the groove bottom of the clamping groove, the other;

the other end of the supporting arm corresponding to the mounting box in the second driving part is hinged with the mounting box, the axial direction of a hinge shaft formed at the hinged joint is parallel to the axial direction of the pipe fitting, the other end of the supporting arm corresponding to the retainer in the second driving part is hinged with the mounting box, and the axial direction of the hinge shaft formed at the hinged joint is parallel to the axial direction of the pipe fitting;

the rotary driving mechanism comprises a rotary ring, the axial line of the rotary ring coincides with the central line of the second driving part, right-angle corner supports are fixedly arranged on the mounting frame, the four corner supports are arranged at the outer sides of the rotary ring respectively, the corner supports are arranged at four right-angle corners of a square and the corners of the corner supports are arranged towards the inner side, the corners of the corner supports are fixedly provided with rotatable guide wheels, the axial direction of the guide wheels is parallel to the axial direction of the pipe fitting, the rotary ring is movably clamped in a groove of the guide wheels and can rotate around the self axial direction, and the second driving part is fixedly connected with one end face of the rotary ring.

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