阅读说明：本技术 一种厚壁合金制备加工工艺 (Thick-wall alloy preparation and processing technology ) 是由 王振理 朱自伟 沈如雷 吴炜 刘胜 罗鹏 王明 于 2021-08-06 设计创作，主要内容包括：本发明涉及一种厚壁合金制备加工工艺,具体涉及到一种厚壁合金钢管制备加工分切装置,包括加工台、锯切进位机构、导向架、锯切装置和间距调节机构；与现有技术相比,本发明提供的加工工艺中涉及的装置解决了现有的厚壁合金钢管分切装置在针对厚壁合金钢管分切过程中只能一段一段进行锯切而存在的分切加工所耗时间长、分切效率低的问题。(The invention relates to a thick-wall alloy preparation and processing technology, in particular to a thick-wall alloy steel pipe preparation, processing and slitting device which comprises a processing table, a saw cutting carry mechanism, a guide frame, a saw cutting device and a spacing adjusting mechanism, wherein the saw cutting carry mechanism is arranged on the processing table; compared with the prior art, the device involved in the processing technology provided by the invention solves the problems that the existing thick-wall alloy steel pipe cutting device only can saw one section in the cutting process of the thick-wall alloy steel pipe, and the cutting processing is long in time consumption and low in cutting efficiency.)

1. A thick-wall alloy preparation and processing technology is characterized by comprising the following steps: the processing technology specifically comprises the following steps:

s1, selecting corresponding steel pipe blanks according to the thick-wall alloy steel pipe to be prepared and processed, and carrying out acid washing lubrication on the steel pipe blanks to be formed;

s2, performing roll forming on the steel pipe blank subjected to acid cleaning and lubrication in a cold rolling mode;

s3, performing heat treatment on the thick-wall alloy steel pipe subjected to primary cold rolling forming, and further performing straightening and finishing after the heat treatment to obtain a long thick-wall alloy steel pipe;

s4, cutting the long thick-wall alloy steel pipe into a plurality of equal-length thick-wall alloy steel pipes with shorter sizes through a thick-wall alloy steel pipe preparation and cutting device according to the required sizes;

the thick-wall alloy steel pipe preparation and processing device comprises a processing table (1), a saw cutting carry mechanism (2), a guide frame (3), a saw cutting device (4) and a spacing adjusting mechanism (5); wherein:

the table top of the processing table (1) is provided with two sliding rails (11), the sawing carry mechanism (2) is installed on the table top of the processing table (1), the sawing carry mechanism (2) comprises two lifting plates (23) which synchronously and vertically lift and two guide pull rods (24) which are horizontally fixed between the two lifting plates (23), the two guide pull rods (24) are arranged in parallel, and the axial direction of each guide pull rod (24) is the same as the guide direction of each sliding rail (11); at least three guide frames (3) are uniformly distributed along the direction of the slide rail (11), and a sawing device (4) is correspondingly arranged on each guide frame (3); the guide frame (3) comprises a sliding base (31) which is in sliding fit with the two sliding rails (11), and vertical guide rails (32) are arranged on the upper end surface of the sliding base (31) in a mirror symmetry mode at positions close to the two ends; a bearing guide seat (33) is arranged on the upper end surface of the sliding base (31) in the middle between the two vertical guide rails (32);

the processing table (1) is horizontally provided with two spacing adjusting mechanisms (5) in mirror symmetry, and the two spacing adjusting mechanisms (5) are arranged in one-to-one correspondence with the two vertical guide rails (32) on the guide frame (3); the distance adjusting mechanism (5) comprises a plurality of adjusting electric cylinders (51) which are horizontally and fixedly installed on the bottom side of the table top of the processing table (1), the output direction of the adjusting electric cylinders (51) is perpendicular to the guiding direction of the sliding rail (11), a plurality of stroke frames (52) are fixedly installed together at the output ends of the adjusting electric cylinders (51), guide shafts (521) parallel to the guiding pull rods (24) are horizontally and fixedly installed on the stroke frames (52), a plurality of connecting rod assemblies (53) which are one less than the guiding frames (3) are uniformly distributed on the guide shafts (521) along the axial direction, each two adjacent vertical guide rails (32) of each group are correspondingly provided with the connecting rod assemblies (53), each connecting rod assembly (53) comprises a hinge seat (531) which is slidably arranged on the guide shafts (521) and two connecting rods (532) of which one end is hinged on the hinge seat (531), the other ends of the two connecting rods (532) are correspondingly hinged on two adjacent vertical guide rails (32) one by one; one of the articulated seats (531) is fixedly connected with the stroke frame (52).

2. A thick-walled alloy preparation and processing technology as claimed in claim 1, wherein: the sawing device (4) comprises tensioning mechanisms (41) which are slidably mounted on the two vertical guide rails (32) and sawing mechanisms (42) assembled on the tensioning mechanisms (41), wherein the tensioning mechanisms (41) are horizontally slidably mounted on the two guide pull rods (24).

3. A thick-walled alloy preparation and processing technology as claimed in claim 2, wherein: tensioning mechanism (41) is including the lift roof beam structure (411) of shape, lift roof beam structure (411) slidable mounting is on two vertical guide rails (32), just the top and two direction pull rod (24) sliding fit of lift roof beam structure (411), one side fixed mounting of lift roof beam structure (411) has regulation driving motor (412), lift roof beam structure (411) are improved level and are rotated and install one end and adjust driving motor (412) output shaft fixed connection's two-way lead screw (413), horizontal fixed mounting has two guide arms (414) of distributing in two-way lead screw (413) both sides on lift roof beam structure (411), correspond threaded connection on two screw thread sections of two-way lead screw (413) has stroke seat (415), stroke seat (415) and two guide arm (414) sliding fit.

4. A thick-walled alloy preparation and processing technology as claimed in claim 3, wherein: saw cut mechanism (42) including two one-to-one motor frame (421), two of fixed mounting on two stroke seat (415) motor frame (421) with equal fixed mounting on one side lateral wall have cutting motor (422), fixed mounting has dish axle (423) on the output shaft of cutting motor (422), fixed assembly is equipped with band saw dish (424) on dish axle (423), two relative band saw dish (424) of bearing guide holder (33) set up between two parties, two the cover is equipped with band saw (426) between band saw dish (424).

5. A thick-walled alloy preparation and processing technology as claimed in claim 1, wherein: be provided with on bearing guide holder (33) and be the isosceles trapezoid structure of falling and both sides open-ended bearing groove, the opening direction that holds the support groove is located the direction of slide rail (11), be provided with between two parties on bearing guide holder (33) and keep away position groove (331), keep away position groove (331) and be located under band saw (426), it installs two deflector rolls (332), two all rotates on two trapezoidal inclined planes that lie in the bearing groove on bearing guide holder (33) deflector roll (332) distribute in the both sides of keeping away position groove (331), just the center pin of deflector roll (332) is parallel with trapezoidal inclined plane.

6. A thick-walled alloy preparation and processing technology as claimed in claim 1, wherein: saw cut carry mechanism (2) still include two fixed mounting at support frame (21) and two vertical fixed mounting in the lift electronic jar (22) on two support frame (21) tops of one-to-one at processing platform (1) top, two lifter plate (23) one-to-one fixed mounting is at the output of two lift electronic jar (22).

7. A thick-walled alloy preparation and processing technology as claimed in claim 4, wherein: the band saw disc (424) is composed of two half discs (425) which are coaxially arranged in a mirror symmetry mode, an annular notch (4251) is formed in the disc face on one side of each half disc (425) from the outer edge position, a plurality of convex blocks (4252) are uniformly distributed on the disc face on the other side of each half disc (425) around the center circumference, a circular hole groove (4253) is formed in one side of each convex block (4252) from the annular notch (4251), each convex block (4252) is provided with a guide assembly (4254) in the circular hole groove (4253), each guide assembly (4254) comprises a pressure spring (4255) with one end fixed to the inner end face of the circular hole groove (4253), a cylindrical end head (4256) fixedly connected to the other end of the pressure spring (4255) and a ball (4257) movably embedded on the cylindrical end head (4256), the cylindrical end head (4256) is in sliding fit with the circular hole groove (4253), and the ball (4257) is located outside the circular hole groove (4253), the band saw (426) is sleeved in the annular gap (4251) and tightly attached between the balls (4257) on the two sides.

Technical Field

The invention relates to the technical field of alloy section processing, and particularly provides a thick-wall alloy preparation processing technology.

Background

Thick-walled alloys, i.e., sections made of alloys having a greater wall thickness than thin-walled sections; the thick-wall alloy steel pipe is a steel pipe section with a thicker pipe wall, and the thick-wall alloy steel pipe is also generally called a thick-wall seamless steel pipe.

The thick-wall seamless steel pipe is formed by punching a whole round steel, and the surface of the thick-wall seamless steel pipe is not provided with a welding seam. The seamless steel pipe is mainly used as a petroleum geology drill pipe, a cracking pipe, a boiler pipe and a bearing pipe for petrochemical industry, and a high-precision structural steel pipe for automobiles, tractors and aviation. After the thick-wall seamless steel pipe is produced and formed, the thick-wall seamless steel pipe is basically in a long-size steel pipe structure, but in some application occasions and as a machining raw material, the long-size seamless steel pipe needs to be further cut into seamless steel pipes with shorter sizes, a band saw is generally adopted for sawing during cutting, but the existing steel pipe cutting equipment can only cut one section of the seamless steel pipe basically, so that the cutting efficiency is low, and particularly when the thick-wall seamless steel pipe is cut, because the pipe wall is thick, the time consumed for cutting is prolonged along with the increase of the pipe wall thickness, the technical problems of how to save the processing time and improve the cutting efficiency in the process of cutting the thick-wall seamless steel pipe are solved.

Disclosure of Invention

In order to solve the problems, the invention provides a thick-wall alloy preparation processing technology, which is used for solving the problems mentioned in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: the preparation and processing technology of the thick-wall alloy specifically comprises the following steps:

s1, selecting corresponding steel pipe blanks according to the thick-wall alloy steel pipe to be prepared and processed, and carrying out acid washing lubrication on the steel pipe blanks to be formed;

s2, performing roll forming on the steel pipe blank subjected to acid cleaning and lubrication in a cold rolling mode;

s3, performing heat treatment on the thick-wall alloy steel pipe subjected to primary cold rolling forming, and further performing straightening and finishing after the heat treatment to obtain a long thick-wall alloy steel pipe;

s4, cutting the long thick-wall alloy steel pipe into a plurality of equal-length thick-wall alloy steel pipes with shorter sizes through a thick-wall alloy steel pipe preparation and cutting device according to the required sizes;

the thick-wall alloy steel pipe preparation and processing device comprises a processing table, a saw cutting carry mechanism, a guide frame, a saw cutting device and a spacing adjusting mechanism, wherein the saw cutting carry mechanism is arranged on the processing table; wherein:

the automatic carrying saw cutting machine is characterized in that two sliding rails are arranged on the table board of the machining table, the saw cutting carrying mechanism is installed on the table board of the machining table and comprises two synchronous vertical lifting plates and two guide pull rods horizontally fixed between the two lifting plates, the two guide pull rods are arranged in parallel, and the axial direction of each guide pull rod is the same as the guide direction of the corresponding sliding rail.

At least three guide frames are uniformly distributed along the direction of the slide rail, and the saw cutting devices are correspondingly arranged on each guide frame; the guide frame comprises a sliding base which is in sliding fit with the two sliding rails, and vertical guide rails are arranged on the upper end surface of the sliding base in a mirror symmetry mode at positions close to the two ends; and a bearing guide seat is arranged between the two vertical guide rails on the upper end surface of the sliding base in the middle.

The saw cutting device comprises tensioning mechanisms which are slidably mounted on the two vertical guide rails and saw cutting devices which are assembled on the tensioning mechanisms, and the tensioning mechanisms are horizontally slidably mounted on the two guide pull rods.

The two distance adjusting mechanisms are horizontally arranged on the processing table in a mirror symmetry mode, and are arranged in one-to-one correspondence with the two vertical guide rails on the guide frame; the distance adjusting mechanism comprises a plurality of adjusting electric cylinders horizontally and fixedly mounted on the bottom side of the table top of the machining table, the output direction of each adjusting electric cylinder is perpendicular to the guiding direction of the corresponding sliding rail, the output ends of the plurality of adjusting electric cylinders are jointly and fixedly mounted with a stroke frame, guide shafts parallel to the guide pull rods are horizontally and fixedly mounted on the stroke frames, a plurality of connecting rod assemblies with the number less than that of the guide frames are uniformly distributed on the guide shafts in the axial direction, the connecting rod assemblies are correspondingly arranged on two adjacent vertical guide rails in each group, each connecting rod assembly comprises a hinge seat slidably arranged on the guide shafts and two connecting rods with one ends hinged on the hinge seats, and the other ends of the two connecting rods are correspondingly hinged on the two adjacent vertical guide rails one by one; one of the hinged seats is fixedly connected with the stroke frame.

Preferably, the tensioning mechanism comprises a v-21274-shaped lifting beam frame, the lifting beam frame is slidably mounted on the two vertical guide rails, the top end of the lifting beam frame is in sliding fit with the two guide pull rods, an adjusting driving motor is fixedly mounted on one side of the lifting beam frame, a bidirectional lead screw is horizontally and rotatably mounted on the lifting beam frame, one end of the bidirectional lead screw is fixedly connected with an output shaft of the adjusting driving motor, the two guide rods are horizontally and fixedly mounted on the lifting beam frame and distributed on two sides of the bidirectional lead screw, corresponding threads on two thread sections of the bidirectional lead screw are connected with stroke seats, and the stroke seats are in sliding fit with the two guide rods.

Preferably, the sawing mechanism includes two one-to-one fixed mounting and is two motor frame on the stroke seat, two equal fixed mounting has the cutting motor on the same one side lateral wall of motor frame, fixed mounting has the dish axle on the output shaft of cutting motor, the epaxial fixed assembly of dish has the band saw dish, the bearing guide holder is two relatively the band saw dish sets up between two the cover is equipped with the band saw between the band saw dish.

Preferably, be provided with on the bearing guide holder and be the bearing groove that falls isosceles trapezoid structure and both sides open-ended, the opening direction in bearing groove is located the direction of slide rail, be provided with between two parties on the bearing guide holder and keep away the position groove, it is located to keep away the position groove under the band saw, lie in on the bearing guide holder all rotate on two trapezoidal inclined planes in bearing groove and install two deflector rolls, two the deflector roll distributes keep away the both sides in position groove, just the center pin of deflector roll with trapezoidal inclined plane is parallel.

Preferably, saw cut carry mechanism still include two fixed mounting and be in the support frame and two vertical fixed mounting of one-to-one at processing platform top are two the electronic jar of lift on support frame top, two the lifter plate one-to-one fixed mounting is two the output of electronic jar of lift.

Preferably, the band saw dish comprises the half dish that two coaxial mirror symmetry set up, annular breach has been seted up from outward flange position in the quotation of half dish one side, it is provided with a plurality of lugs to center circumference evenly distributed in the opposite side quotation of half dish, the lug is followed annular breach one side is provided with the round hole groove, the lug is being located be provided with the guide subassembly in the round hole groove, the guide subassembly includes that one end is fixed pressure spring, the fixed connection of the terminal surface in the round hole groove is in the cylinder end and the activity of the pressure spring other end are inlayed ball on the cylinder end, the cylinder end with round hole groove sliding fit, the ball is located outside the round hole groove, the band saw cover is established in the annular breach and paste tightly in both sides between the ball.

The technical scheme has the following advantages or beneficial effects: 1. the invention provides a thick-wall alloy preparation and processing technology, particularly relates to a thick-wall alloy steel pipe preparation, processing and cutting device, and solves the problems that the existing thick-wall alloy steel pipe cutting device only can saw one section in the thick-wall alloy steel pipe cutting process, and the cutting processing is long in time consumption and low in cutting efficiency.

2. The invention provides a thick-wall alloy preparation and processing technology, and particularly relates to a thick-wall alloy steel pipe preparation, processing and slitting device.

3. The invention provides a thick-wall alloy preparation and processing technology, and particularly relates to a thick-wall alloy steel pipe preparation and processing slitting device.

4. The invention provides a thick-wall alloy preparation and processing technology, and particularly relates to a thick-wall alloy steel pipe preparation and processing slitting device.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a process flow diagram of a thick-wall alloy preparation process provided by the invention.

FIG. 2 is a schematic perspective view of a thick-wall alloy steel pipe preparation, processing and slitting device provided by the invention.

FIG. 3 is a top view of the thick-wall alloy steel pipe preparation, processing and slitting device provided by the invention.

FIG. 4 is a side view of the thick-wall alloy steel pipe preparation processing slitting device provided by the invention.

Fig. 5 is a perspective view of the guide frame and sawing device assembly.

FIG. 6 is a perspective view of the assembly of the reel and the band saw blade.

FIG. 7 is a front view of the assembly of the arbor and band saw blade.

Fig. 8 is a cross-sectional view a-a of fig. 7.

In the figure: 1. a processing table; 11. a slide rail; 2. a sawing carry mechanism; 21. a support frame; 22. a lifting electric cylinder; 23. a lifting plate; 24. a guide pull rod; 3. a guide frame; 31. a sliding base; 32. a vertical guide rail; 33. supporting a guide seat; 331. a position avoiding groove; 332. a guide roller; 4. a sawing device; 41. a tensioning mechanism; 411. a lifting beam frame; 412. adjusting the drive motor; 413. a bidirectional lead screw; 414. a guide bar; 415. a stroke seat; 42. a sawing mechanism; 421. a motor frame; 422. cutting the motor; 423. a disc shaft; 424. a band saw disc; 425. a half-disc; 4251. an annular gap; 4252. a bump; 4253. a circular hole groove; 4254. a guide assembly; 4255. a pressure spring; 4256. a cylindrical end; 4257. a ball bearing; 426. band sawing; 5. a spacing adjustment mechanism; 51. adjusting the electric cylinder; 52. a stroke frame; 521. a guide shaft; 53. a connecting rod assembly; 531. a hinged seat; 532. a connecting rod.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.

As shown in fig. 1, the thick-wall alloy preparation and processing technology specifically comprises the following steps:

s1, selecting corresponding steel pipe blanks according to the thick-wall alloy steel pipe to be prepared and processed, and carrying out acid washing lubrication on the steel pipe blanks to be formed;

s2, performing roll forming on the steel pipe blank subjected to acid cleaning and lubrication in a cold rolling mode;

s3, performing heat treatment on the thick-wall alloy steel pipe subjected to primary cold rolling forming, and further performing straightening and finishing after the heat treatment to obtain a long thick-wall alloy steel pipe;

s4, cutting the long thick-wall alloy steel pipe into a plurality of equal-length thick-wall alloy steel pipes with shorter sizes through a thick-wall alloy steel pipe preparation and cutting device according to the required sizes;

as shown in fig. 2, the thick-wall alloy steel pipe preparation, processing and slitting device comprises a processing table 1, a saw cutting carrying mechanism 2, a guide frame 3, a saw cutting device 4 and a spacing adjusting mechanism 5, wherein the thick-wall alloy steel pipe is processed by the thick-wall alloy preparation and processing technology of the steps S1-S4;

as shown in fig. 5, two slide rails 11 are arranged on the table top of the processing table 1, four guide frames 3 are uniformly distributed along the direction of the slide rails 11, and a sawing device 4 is correspondingly arranged on each guide frame 3; the guide frame 3 comprises a sliding base 31 in sliding fit with the two sliding rails 11, and vertical guide rails 32 are arranged on the upper end surface of the sliding base 31 in a mirror symmetry mode at positions close to the two ends; a bearing guide seat 33 is arranged on the upper end surface of the sliding base 31 in the middle between the two vertical guide rails 32; be provided with on bearing guide holder 33 and be the bearing groove that falls isosceles trapezoid structure and both sides open-ended, the opening direction in bearing groove is located the direction of slide rail 11, be provided with between two parties on bearing guide holder 33 and keep away position groove 331, keep away position groove 331 and be located band saw 426 under, two deflector rolls 332 are all installed in rotating on two trapezoidal inclined planes in bearing groove on bearing guide holder 33, two deflector rolls 332 distribute in the both sides of keeping away position groove 331, and deflector roll 332's center pin is parallel with trapezoidal inclined plane.

The sawing device 4 is slidably assembled on the two vertical guide rails 32, so that in the actual cutting process of the steel pipe, the two vertical guide rails 32 can provide carry guide for the sawing device 4, in addition, the sliding base 31 is slidably arranged on the two sliding rails 11, and when the cutting distance is adjusted, the sawing device 4 can integrally slide along the two sliding rails 11 along with the guide frame 3; before cutting the steel pipe, the steel pipe will be placed on four bearing guide holder 33, on the one hand, bearing guide holder 33 will provide the horizontal bearing to the steel pipe, on the other hand, the steel pipe is placed by the restriction between the deflector roll 332 that is the V type and arranges, on the basis of keeping horizontal bearing, can realize the location of ajusting, guarantee the relative axial perpendicular of cutting incision of steel pipe, and at the in-process that removes the steel pipe, the deflector roll 332 can assist the steel pipe to remove, in addition, keep away the position of groove 331 promptly and saw cut the position promptly, and along with cutting the regulation of distance, keep away the band saw 426 position of groove 331 and top and keep unchangeable relatively.

As shown in fig. 2, 3 and 4, two spacing adjusting mechanisms 5 are horizontally arranged on the processing table 1 in a mirror symmetry manner, and the two spacing adjusting mechanisms 5 are arranged in one-to-one correspondence with the two vertical guide rails 32 on the guide frame 3; the distance adjusting mechanism 5 comprises two adjusting electric cylinders 51 horizontally and fixedly installed on the bottom side of the table top of the processing table 1 through bolts, the output directions of the two adjusting electric cylinders 51 are perpendicular to the guiding direction of the sliding rail 11, the output ends of the two adjusting electric cylinders 51 are welded with a stroke frame 52 together, a guide shaft 521 parallel to the guide pull rod 24 is horizontally welded on the stroke frame 52, three connecting rod assemblies 53 are uniformly distributed on the guide shaft 521 along the axial direction, each group of two adjacent vertical guide rails 32 is correspondingly provided with the connecting rod assemblies 53, each connecting rod assembly 53 comprises a hinge seat 531 slidably arranged on the guide shaft 521 and two connecting rods 532 with one ends hinged on the hinge seat 531, and the other ends of the two connecting rods 532 are hinged on the two adjacent vertical guide rails 32 one by one; one of the hinge seats 531 in the middle is fixedly connected to the stroke frame 52 by means of bolts.

Since the hinge seats 531 in the middle link assembly 53 are fixedly connected to the traveling rack 52, and the two guide frames 3 hinged to the link assembly 53 are always distributed at equal intervals on both sides of the hinge seats 531, the positions of the two guide frames 3 in the middle are relatively determined, so that the positions of the two guide frames 3 on the side naturally change with the change of the positions of the two guide frames 3 in the middle under the control of the other two link assemblies 53, and the intervals between the adjacent guide frames 3 in each group are always equal.

When a long steel pipe is cut, according to the length of a short steel pipe to be cut, the distance between two adjacent cutting devices 4 can be adjusted through synchronous adjustment of two distance adjusting mechanisms 5, specifically, four adjusting electric cylinders 51 are synchronously started to enable two stroke frames 52 to synchronously move towards or away from each other, when the two stroke frames 52 synchronously move towards each other, the opening angle of two connecting rods 532 in the connecting rod assembly 53 is increased, the distance between the two guide frames 3 in the middle is increased, the hinge seats 531 in the connecting rod assemblies 53 at two sides slide along the guide shaft 521 and synchronously leave away from the hinge seat 531 in the middle, while sliding, the connecting rod assemblies 53 at two sides urge the distance between the two guide frames 3 at the side and the adjacent guide frames 3 to synchronously adjust, after the adjustment, the distance between two band saws 426 in the adjacent cutting devices 4 is the length of the short steel pipe to be cut, when the two stroke frames 52 move back and forth synchronously, the adjustment process is just opposite to the adjustment process when the stroke frames move towards each other, and the detailed description is omitted here.

As shown in fig. 2, 4 and 5, the sawing device 4 comprises a tensioning mechanism 41 slidably mounted on the two vertical guide rails 32 and a sawing mechanism 42 mounted on the tensioning mechanism 41, the tensioning mechanism 41 being horizontally slidably mounted on the two guide rods 24; the tensioning mechanism 41 comprises a lift beam frame 411 in a shape of '21274', the lift beam frame 411 is slidably mounted on the two vertical guide rails 32, the top end of the lift beam frame 411 is in sliding fit with the two guide pull rods 24, an adjusting driving motor 412 is fixedly mounted on one side of the lift beam frame 411 through a bolt, a bidirectional screw 413 with one end fixedly connected with an output shaft of the adjusting driving motor 412 is horizontally and rotatably mounted on the lift beam frame 411, two guide rods 414 distributed on two sides of the bidirectional screw 413 are horizontally welded on the lift beam frame 411, a stroke seat 415 is correspondingly in threaded connection with two thread sections of the bidirectional screw 413, and the stroke seat 415 is in sliding fit with the two guide rods 414.

As shown in fig. 5, 6, 7 and 8, the sawing mechanism 42 includes two motor frames 421 welded on the two stroke seats 415 in a one-to-one correspondence manner, the side walls of the same sides of the two motor frames 421 are both fixedly provided with cutting motors 422 through bolts, the output shafts of the cutting motors 422 are fixedly provided with disc shafts 423, the disc shafts 423 are fixedly provided with band saw discs 424, the supporting guide seat 33 is centrally arranged relative to the two band saw discs 424, and a band saw 426 is sleeved between the two band saw discs 424; the band saw disc 424 is composed of two half discs 425 which are coaxially arranged in a mirror symmetry mode, the two half discs 425 are fixed through bolts after being positioned at the centers of disc shafts 423, an annular gap 4251 is formed in the disc face on one side of each half disc 425 from the outer edge position, eight convex blocks 4252 are uniformly distributed on the disc face on the other side of each half disc 425 around the center circumference, a circular hole groove 4253 is formed in one side of each convex block 4252 from the annular gap 4251, a guide assembly 4254 is arranged in each convex block 4252 and located in each circular hole groove 4253, each guide assembly 4254 comprises a pressure spring 4255, one end of each pressure spring 4255 is welded to the inner end face of each circular hole groove 4253, a cylindrical end 4256 welded to the other end of each pressure spring 4255 and a ball 4257 movably embedded on each cylindrical end 4256, each cylindrical end 4256 is in sliding fit with each circular hole groove 4253, each ball 4257 is located outside each circular hole groove 4253, and each ball 426 is sleeved in each annular gap 4251 and tightly attached between the balls 4257 on the two sides.

The distance between the two band saw discs 424 can be adjusted by the tensioning mechanism 41, specifically, the bidirectional screw 413 is driven to rotate by starting the adjusting drive motor 412, then the two stroke seats 415 are driven by the bidirectional screw 413 to slide oppositely or reversely along the two guide rods 414, so that the two motor frames 421 are driven to synchronously move along with the bidirectional screw, when the distance between the two band saw discs 424 is reduced, the whole band saw 426 is conveniently sleeved on the two band saw discs 424, then, the distance between the two band saw discs 424 is increased, so that the whole band saw 426 is tightened, the band saw 426 is sleeved on the annular gap 4251, the band saw 426 is positioned between eight groups of guide assemblies 4254 in the two half discs 425 in the band saw discs 424, and under the elastic force of the pressure spring 4255, the band saw 426 is tightly attached between the two side balls 4257, on one hand, the balls 4257 can form rolling contact with the band saw 426, on the other hand, the band saw 426 can be straightened by the eight groups of balls 4257, the vertical saw cutting is convenient to carry out.

As shown in fig. 2, the sawing carry mechanism 2 is installed on the table top of the processing table 1, the sawing carry mechanism 2 includes two lifting plates 23 which are lifted synchronously and vertically and two guide pull rods 24 which are horizontally welded between the two lifting plates 23, the two guide pull rods 24 are arranged in parallel, and the axial direction of the guide pull rod 24 is the same as the guide direction of the slide rail 11; the sawing carry mechanism 2 further comprises two support frames 21 welded at the top end of the processing table 1 and two lifting electric cylinders 22 vertically and fixedly installed at the top ends of the two support frames 21 through bolts in one-to-one correspondence, and two lifting plates 23 are fixedly installed at the output ends of the two lifting electric cylinders 22 in one-to-one correspondence. The lifting beam frame 411 is in sliding fit with the two guide pull rods 24, so that the adjustment of the slitting distance is not affected, and the synchronous lifting of the four sawing devices 4 can be realized under the driving of the two guide pull rods 24.

When a long thick-wall alloy steel pipe is cut, before processing, according to the length of the steel pipe to be cut, the distance adjustment of four cutting devices 4 is completed through the synchronous adjustment of two distance adjusting mechanisms 5, so that the distance between two band saws 426 in two adjacent cutting devices 4 is equal to the length of the steel pipe to be cut, then, the steel pipe is horizontally placed on four bearing guide seats 33, the distance between the end part of one side to be cut and the nearest cutting position is equal to the cutting distance through moving the steel pipe, then, on one hand, all cutting motors 422 are synchronously started, so that in the cutting devices 4, two band saw discs 424 synchronously rotate through the driving of the two cutting motors 422, and then the band saws 426 are driven to be in a cutting working state, on the other hand, when the four band saws 426 are kept in the cutting state, the two lifting electric cylinders 22 are in a continuous working state, two electronic jars 22 of going up and down will drive two lifter plates 23 and two direction pull rods 24 slowly descend, two direction pull cylinders will drive four in step saw cuts device 4 and descend slowly along the leading truck 3 is synchronous, thereby realize four synchronous saw cuts the carry of saw cutting device 4, finally will obtain four short dimension steel pipes of the same length through saw cutting in step, can saw cut the processing of accomplishing the batchization in the course of working at one, thereby the processing output efficiency in the unit interval has been improved greatly, cutting process efficiency has been improved on the whole, the cutting process time of whole steel pipe has been shortened.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.