CN113333787B - Low-stress blanking device and method for synchronously grooving inside and outside of medium-diameter and large-diameter thick-wall pipe material - Google Patents

Abstract

The invention provides a low-stress blanking device and method for synchronously grooving inside and outside of medium and large-diameter thick-walled pipes, including a power mechanism component, an outer tank component, an inner tank component and a blanking component. The operation of opening micro-ring grooves on the inner surface of the pipe material is realized. The outer groove components are simultaneously grooved at the same radially symmetrical position on the outer surface of the pipe material to improve the generated section defects and improve the production efficiency. After the groove is completed, the wedge block The return drives the unloading roller and the pipe material to carry out rolling contact and unloading, realizing the integration of the internal and external grooving and the unloading device, and the unloaded pipe material can be directly dropped and collected. In the stress cutting process, the inner surface of the medium and large diameter thick-walled pipe material cannot be grooved, and the inner surface of the pipe material obtained by the existing cutting method will produce obvious loops and tearing defects, which is difficult to meet the industrial practice. The flatness requirements of the section and the problems of cumbersome operation, time-consuming and laborious, and inconvenient to take out.

Description

Low-stress cutting device and method for simultaneous internal and external grooving of medium and large diameter thick-walled pipes

technical field

The invention relates to the technical field of machining, in particular to a low-stress blanking device and method for synchronously grooving inside and outside of medium and large-diameter thick-walled pipes.

Background technique

The traditional low-stress blanking machine based on hydraulic compensation is mainly composed of six parts: frequency conversion motor, hydraulic transmission system, double slider mechanism, blanking die, movable clamping mechanism and frame. One end is put into the bearing in the blanking die, and the other end is fixed in the movable clamping mechanism, and the frequency conversion motor drives the blanking die to rotate; due to the high speed of the main shaft of the blanking machine, its smaller mass and rotation radius, A large centrifugal force will be generated, and it will act on the pipe material through the bearing, so that a crack will be generated at the tip of the V-shaped groove of the pipe material. Completely fractured to realize cutting, but before using the existing low-stress cutting machine to cut, it is necessary to prefabricate a V-shaped groove at the same radially symmetrical position on the inner and outer surfaces of the pipe, and open the outer groove, open the inner groove, and cut the three parts of the operation. It needs to be processed in different equipment, which is cumbersome, time-consuming and labor-intensive; in addition, the existing blanking must be carried out in the blanking bearing. phenomenon, it is inconvenient to take out, and the existing metal pipe material low-stress cutting process is only to prefabricate a ring V-shaped groove on the outer surface of the pipe material, but the inner surface of the pipe material obtained by this cutting method will produce obvious loops and loops. Tear defects are difficult to meet the flatness requirements of the blanking section in industrial practice, and the inner surface of the pipe material needs to be ground and chamfered, which significantly increases the production process and man-hours. At present, scholars have carried out some researches on low-stress bending and blanking technology from stress concentration, mechanism design, fracture morphology and so on. For example, as disclosed in the Chinese Invention Patent Publication No. CN110900287A, "An Integrated Linkage Device for Slotting and Cutting of Rods and Pipes Based on the Same Hydraulic Compensation", the connecting rod seat of the blanking slider and the connecting rod seat of the tool slider are respectively fixed on the The different eccentric positions of the hydraulic push plate realize the use of crank connecting rod mechanisms with different bending directions to drive the blanking slider and the tool slider on both sides of the double dovetail sliding table, so as to realize the connection between the blanking slider and the tool slider. Reverse linkage, that is, through the reverse linkage mechanism, grooving and blanking operations can be realized at the same time. However, the above invention can only perform grooving and blanking operations on the outer surface of rods and pipes, but it is difficult to realize the operation of grooving on the inner surface of medium and large diameter thick-walled pipes, and also cannot realize the linkage of internal and external simultaneous grooving and blanking. Therefore, in order to overcome the above-mentioned existing deficiencies, the present invention provides a low-stress blanking method and device for synchronously grooving inside and outside of medium and large diameter thick-walled pipes.

SUMMARY OF THE INVENTION

The embodiment of the present invention provides a low-stress blanking device and method for synchronously grooving inside and outside of medium and large diameter thick-walled pipes. The simultaneous grooving of the groove assembly at the same radially symmetrical position on the outer surface of the pipe material greatly improves the resulting cross-sectional defects and significantly improves the production efficiency. After the inner and outer grooves are completed, the wedge will return to drive the unloading roller to contact the pipe material. , carry out rolling contact blanking, realize the linkage integration of internal and external grooving and blanking device, and the discharged pipe material can be directly dropped and collected, which is easy to operate, saves time and labor, and solves the problem of the existing metal pipe material low-stress blanking process. The inner surface of the medium and large diameter thick-walled pipe material cannot be grooved, and the inner surface of the pipe material obtained by the existing cutting method will produce obvious loops and tearing defects, and it is difficult to meet the flatness requirements of the cutting section in industrial practice. And the problem of cumbersome operation, time-consuming and laborious, and inconvenient to take out.

In view of the above problems, the technical scheme proposed by the present invention is:

A low-stress cutting device for medium and large diameter thick-walled pipes with simultaneous internal and external grooving, including:

a power mechanism assembly, the power mechanism assembly includes a main shaft, a hydraulic push plate, a hydraulic push rod, a sleeve rod, a guide post and a fixed plate;

Wherein, one end face of the main shaft is provided with a first hole position and a second guide groove in sequence from the inside to the outside, a second guide groove is formed on one side of the inner wall of the first hole position, and the fixed plate is arranged on the On one end face of the main shaft, a second hole is opened on one side of the surface of the fixed plate, a first chute is formed on the other side of the surface of the fixed plate, and the hydraulic push plate is arranged on the other end of the main shaft. The hydraulic push rod penetrates the other end face of the main shaft and extends to the inside of the second guide groove, the hydraulic push rod is slidably connected to the main shaft, and the sleeve rod is installed on the hydraulic push plate One end of the hydraulic push rod is inserted into the inside of the sleeve rod, and the other end of the hydraulic push rod penetrates one side of the fixed plate and extends to the outside of the fixed plate;

an outer groove assembly, the outer groove assembly includes a thrust resistance device and an outer groove opening device;

Wherein, the thrust resistance device is arranged on one side of the fixed plate, the outer groove opening device is arranged to connect with the other end of the guide post, and the surface of the outer groove opening device is connected to the surface of the thrust resistance device. touch;

an inner slot assembly, the inner slot assembly includes an inner slot sleeve, an inner slot push rod, a telescopic link, a guide block, an inner slot tool holder, an inner slot knife and a tension spring;

Wherein, a first groove and a second groove are opened on one side of the surface of the inner groove sleeve in sequence, and the guide block is arranged at one end of the surface of the inner groove sleeve close to the second groove, so The outer wall of the guide block is slidably connected with the inside of the second guide groove, the guide block is connected with the other end of the hydraulic push rod, the inner groove tool holder is arranged inside the inner groove sleeve, And one end of the inner groove tool holder is rotatably connected with the inner groove sleeve, the inner groove knife is installed on the other end of the inner groove tool holder, the first groove, the inner groove knife and the The number of the inner groove tool holders is two, which are symmetrically distributed on the other side of the inner groove sleeve according to the axis of the inner groove sleeve, and the two inner groove tool holders are connected by a tension spring One end of the telescopic link is inserted into the inside of the inner groove sleeve, one end of the telescopic link is rotatably connected with the hydraulic push plate, and the other end of the telescopic link is connected with one end of the telescopic link Rotating connection, clearance fit between the outer wall of the telescopic link and the inner wall of the second guide groove;

A blanking assembly, the blanking assembly includes a blanking bracket, a blanking roller, a roller frame, a roller and a second telescopic spring, one end of the blanking frame is arranged inside the first chute, the blanking One end of the bracket is located outside the first chute, the roller bracket is mounted on the other end of the blanking bracket, the roller is rotatably connected to the inner side of the roller bracket, and the blanking roller is rotatably connected On the inner other side of the roller bracket, the surface of the roller is in contact with the outer groove opening device, the roller bracket is slidably connected with the first chute, and one end of the second telescopic spring is in contact with the first slot. The chute is connected, and the other end of the second telescopic spring is connected with the blanking bracket.

In order to better realize the technical solution of the present invention, the following technical measures are also adopted.

Further, the size of the first hole is consistent with the diameter of the second hole, and the axis of the first hole and the axis of the second hole are located on the same straight line.

Further, one side of the sleeve rod is provided with a third guide groove, one side of the guide post is provided with a clamping block, and the outer wall of the clamping block is slidably connected with the inner wall of the third guiding groove.

Further, the pushing resistance device includes a pushing resistance plate and an outer groove push block, the pushing resistance plate is installed on the side of the surface of the fixed plate close to the first chute, and the outer groove pushing block is installed on the side of the first chute. The thrust plate is close to one side of the fixed disk.

Further, the outer groove opening device includes a wedge block, an outer groove tool holder, an outer groove knife and a first telescopic spring, and one side of the wedge block close to the fixed plate is fixedly connected with the other end of the guide column, One side of the wedge block is provided with a second chute, the outer slot knife holder is arranged inside the second chute, and the outer slot knife is arranged so that the outer slot cutter holder pushes away from the outer slot. One end of the block, the end of the outer groove tool holder close to the outer groove push block extends to the outside of the second chute, and is in contact with the outer groove push block.

Further, the shape of the outer groove push block is a triangle, and one end of the outer groove tool holder close to the outer groove push block is set as an inclined surface, and the inclined surface is in contact with the outer groove push block, and the outer groove knife The first telescopic spring is arranged between the clip and the second chute.

Further, the inner groove tool holder and the inner groove knife are used to rotate inside the first groove by using one end of the inner groove tool holder as a rotating shaft, so that the inner groove knife rotates to the first groove. outside of a groove.

Further, the roller is in contact with the side of the surface of the wedge block away from the push block of the outer groove, and the side of the wedge block in contact with the roller is set as an inclined surface.

Further, the hydraulic push plate and the hydraulic push rod are respectively connected with hydraulic cylinders for providing power.

The working method of the low-stress blanking device for synchronously grooving inside and outside of medium and large diameter thick-walled pipes includes the following steps:

S1, pipe material installation, fix the pipe material;

S2, open inner and outer grooves, the inner groove sleeve slides and feeds to the predetermined position on the pipe material in the first hole position inside the main shaft under the pushing action of the hydraulic push rod, and then the hydraulic push plate is under the action of the thrust of the output shaft of the hydraulic cylinder. Feeding, push the inner groove push rod to move in the inner groove sleeve through the telescopic link, after the guide column is fully telescopic into the sleeve rod, the hydraulic push plate continues to feed will push the wedge forward, and the inner groove linked with the hydraulic push plate. The groove push rod pushes the inner groove tool holder to rotate, the inner groove knife extends to the outside of the first groove and contacts the inner surface of the pipe material, and at the same time, the outer groove push block fixed on the push resistance plate and the outer groove tool holder are in contact with each other. One end of the inclined surface contacts, so that it moves towards the inner groove sleeve, the outer groove knife protrudes from the second chute and contacts the outer surface of the pipe material. At this time, the inner groove knife and the outer groove knife are respectively on the inner and outer surfaces of the pipe material. Simultaneously cutting metal on the inner and outer surfaces of the pipe material at the same radially symmetrical position, and grooving;

S3, after blanking and grooving, the hydraulic push plate is retracted to make the guide post protrude from the sleeve rod, and the inner groove push rod is retracted into the main shaft, and the outer groove tool holder and the outer groove knife are retracted under the action of the tension spring. Inside the inner grooved sleeve, the hydraulic push plate suspends its action immediately, then the hydraulic push rod retracts to drive the inner grooved sleeve to retract into the main shaft, the hydraulic push plate continues to retreat, drives the wedge to drive the roller to roll, and at the same time the unloading roller contacts the pipe material And press down, increase the return distance of the hydraulic push plate, increase the displacement load of the blanking roller on the pipe material, and realize the blanking operation.

Compared with the prior art, the beneficial effect of the present invention is that the operation of opening micro-ring grooves on the inner surface of the pipe material is realized by setting a retractable inner groove assembly, and the outer groove assembly is radially symmetrical on the outer surface of the pipe material. The synchronous grooving at the position improves the resulting cross-sectional defects and improves the production efficiency. After the internal and external grooving is completed, the wedge will return to drive the blanking roller to contact the pipe material for rolling contact blanking, so as to realize the internal and external grooving and The cutting device is linked and integrated, and the pipe material can be directly dropped and collected, which is easy to operate, saves time and labor, and solves the problem of the existing metal pipe material low-stress cutting process that cannot be used for medium and large diameter thick-walled pipe materials. The surface is grooved, and the inner surface of the pipe material obtained by the existing cutting method will produce obvious loops and tearing defects, which is difficult to meet the flatness requirements of the cutting section in industrial practice and the problems of cumbersome operation, time-consuming and laborious, and inconvenient to take out.

The above description is only an overview of the technical solutions of the present invention, in order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand , the following specific embodiments of the present invention are given.

Description of drawings

Fig. 1 is a kind of structural schematic diagram of the low-stress feeding device for synchronously grooving inside and outside the medium and large diameter thick-walled pipe material disclosed in the embodiment of the present invention;

Fig. 2 is another structural schematic diagram of a low-stress feeding device for synchronously grooving inside and outside a medium-large diameter thick-walled pipe material disclosed in an embodiment of the present invention;

3 is a schematic structural diagram of another perspective of the low-stress blanking device for synchronously grooving inside and outside of medium and large-diameter thick-walled pipes disclosed in an embodiment of the present invention;

4 is a schematic front view of the structure of a low-stress blanking device for synchronously grooving inside and outside a medium-large diameter thick-walled pipe disclosed in an embodiment of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure in the direction A-A in FIG. 4;

Fig. 6 is a schematic diagram of enlarged structure at A place in Fig. 5;

Fig. 7 is a schematic diagram of enlarged structure at B in Fig. 5;

Fig. 8 is the enlarged structural schematic diagram at C in Fig. 5;

FIG. 9 is a schematic diagram of a cross-sectional structure in the direction B-B in FIG. 4;

10 is a schematic structural diagram of the outer tank assembly disclosed in an embodiment of the present invention from a perspective;

11 is a schematic structural diagram of the outer tank assembly disclosed in the embodiment of the present invention from another perspective;

12 is a schematic structural diagram of a low-stress blanking device for simultaneous internal and external grooving of medium and large diameter thick-walled pipes disclosed in an embodiment of the present invention, with the external groove assembly and the main shaft removed;

13 is a schematic diagram of an explosion structure of an inner tank assembly disclosed in an embodiment of the present invention;

14 is a schematic flow chart of the working method of the low-stress blanking device for synchronously grooving inside and outside of medium and large-diameter thick-walled pipes disclosed in an embodiment of the present invention.

Reference numerals: 10, power mechanism assembly; 11, main shaft; 111, first hole position; 112, first guide groove; 113, second guide groove; 12, hydraulic push plate; 13, hydraulic push rod; 14, sleeve Rod; 141, the third guide groove; 15, the guide post; 151, the clamping block; 16, the fixed plate; 161, the first chute; 162, the second hole position; 20, the outer groove assembly; 211, push plate; 212, outer groove push block; 22, outer groove opening device; 221, wedge; 2211, second chute; 222, outer groove tool holder; 223, outer groove knife; 224, first telescopic Spring; 30, inner groove assembly; 31, inner groove sleeve; 311, first groove; 312, second groove; 32, inner groove push rod; 33, telescopic link; 34, guide block; 35, inner 36, inner groove knife; 37, tension spring; 40, blanking assembly; 41, blanking bracket; 42, blanking roller; 43, roller bracket; 44, roller; 45, second telescopic spring.

specific embodiment

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Referring to Figures 1-13, the low-stress blanking device for medium and large-diameter thick-walled pipes with simultaneous internal and external grooves includes a power mechanism assembly 10, an outer groove assembly 20, an inner groove assembly 30 and a blanking assembly 40.

Referring to Figures 1-5, 9 and 12-13, the power mechanism assembly 10 includes a main shaft 11, a hydraulic push plate 12, a hydraulic push rod 13, a sleeve rod 14, a guide post 15 and a fixed plate 16. One end face of the main shaft 11 A first hole 111 and a second guide groove 113 are sequentially opened from the inside to the outside. A second guide groove 113 is formed on one side of the inner wall of the first hole 111. The fixed plate 16 is arranged on one end face of the main shaft 11, and is connected with the main shaft. 11 is fixedly connected, the surface side of the fixed plate 16 is provided with a second hole position 162, the size of the first hole position 111 is consistent with the aperture of the second hole position 162, and the axis of the first hole position 111 and the second hole position The axis of 162 is located on the same straight line, the other side of the surface of the fixed plate 16 is provided with a first chute 161, the hydraulic push plate 12 is arranged on the surface of the other end of the main shaft 11, and is slidably connected with the main shaft 11, and the hydraulic push rod 13 penetrates the main shaft. The other end face of 11 extends to the inside of the second guide groove 113, the hydraulic push rod 13 is slidably connected with the main shaft 11, the sleeve rod 14 is installed on the surface side of the hydraulic push plate 12, and one end of the hydraulic push rod 13 is inserted into the sleeve. Inside the rod 14, one side of the sleeve rod 14 is provided with a third guide groove 141, one side of the guide post 15 is provided with a blocking block 151, the outer wall of the blocking block 151 is slidably connected with the inner wall of the third guide groove 141, and the blocking block 151 For limiting the movable position of the guide post 15, the other end of the hydraulic push rod 13 penetrates one side of the fixed plate 16, extends to the outside of the fixed plate 16, and is slidably connected with the fixed plate 16. The hydraulic push plate 12 and the hydraulic push rod 13 are respectively connected with hydraulic cylinders for providing power, and the outer tank assembly 20, the inner tank assembly 30 and the blanking assembly 40 are driven by the hydraulic push plate 12 and the hydraulic push rod 13 to achieve the same radially symmetrical position on the inner and outer surfaces of the pipe material. Synchronous grooving can improve the resulting cross-sectional defects and improve production efficiency. After the internal and external grooving is completed, the wedge 221 will return to drive the blanking roller 42 to contact the pipe material, and carry out rolling contact blanking to realize the internal and external grooving and blanking device. Linkage integration.

Referring to Figures 1-6 and 8-13, the outer groove assembly 20 includes a pushing resistance device 21 and an outer groove opening device 22, the pushing resistance device 21 is arranged on one side of the fixed plate 16, and the outer groove opening device 22 is arranged and guided. The other end of the column 15 is connected, and the surface of the outer groove opening device 22 is in contact with the surface of the pushing resistance device 21 . The pushing resistance device 21 includes a pushing resistance plate 211 and an outer groove pushing block 212 , and the pushing resistance plate 211 is installed on the surface of the fixed plate 16 . On the side close to the first chute 161, the outer groove push block 212 is installed on the side of the push resistance plate 211 close to the fixed plate 16, and the outer groove opening device 22 includes a wedge block 221, an outer groove tool holder 222, an outer groove knife 223 and The first telescopic spring 224, one side of the wedge block 221 close to the fixing plate 16 is fixedly connected with the other end of the guide column 15, one side of the wedge block 221 is provided with a second chute 2211, and the outer groove tool holder 222 is provided on the second slide block 221. Inside the slot 2211, the outer slot knife 223 is arranged at the end of the outer slot tool holder 222 away from the outer slot push block 212, and the end of the outer slot tool holder 222 close to the outer slot push block 212 extends to the outside of the second chute 2211, and is connected with the outer slot 2211. The outer groove push block 212 is in contact with the outer groove push block 212, and the shape of the outer groove push block 212 is triangular. A first telescopic spring 224 is arranged between the second chute 2211 and the inner slot assembly 30 includes an inner slot sleeve 31, an inner slot push rod 32, a telescopic link 33, a guide block 34, an inner slot tool holder 35, an inner slot The knife 36 and the tension spring 37, a first groove 311 and a second groove 312 are formed on one side of the surface of the inner groove sleeve 31 in turn, and the guide block 34 is arranged on the surface of the inner groove sleeve 31 close to the second groove 312. At one end, the outer wall of the guide block 34 is slidably connected to the inside of the second guide groove 113 , the guide block 34 is connected to the other end of the hydraulic push rod 13 , the inner groove tool holder 35 is arranged inside the inner groove sleeve 31 , and the inner groove One end of the tool holder 35 is rotatably connected with the inner groove sleeve 31, the inner groove knife 36 is installed on the other end of the inner groove tool holder 35, and the number of the first groove 311, the inner groove knife 36 and the inner groove tool holder 35 is two. The axial center of the inner groove sleeve 31 is symmetrically distributed on the other side of the inner groove sleeve 31, the two inner groove tool holders 35 are connected by a tension spring 37, and the inner groove tool holder 35 and the inner groove knife 36 pass through the inner groove. One end of the grooved knife holder 35 is a rotating shaft for rotating inside the first groove 311 , so that the inner grooved knife 36 rotates to the outside of the first groove 311 , and one end of the telescopic link 33 is inserted into the inner grooved sleeve 31 . One end of the telescopic link 33 is rotatably connected with the hydraulic push plate 12 , the other end of the telescopic link 33 is rotatably connected with one end of the telescopic link 33 , and the outer wall of the telescopic link 33 is in clearance fit with the inner wall of the second guide groove 113 , when opening the inner and outer grooves, the inner groove sleeve 31 is slid and fed to the predetermined position on the pipe material in the first hole position 111 inside the main shaft 11 under the pushing action of the hydraulic push rod 13, and then the hydraulic push plate 12 is in Feed under the action of the thrust of the output shaft of the hydraulic cylinder, and push through the telescopic link 33 The inner groove push rod 32 moves in the inner groove sleeve 31. After the guide post 15 is fully retracted into the sleeve rod 14, the hydraulic push plate 12 continues to feed and push the wedge block 221 forward. The rod 32 pushes the inner groove tool holder 35 to rotate, the inner groove knife 36 protrudes to the outside of the first groove 311 and contacts the inner surface of the pipe material, and the outer groove push block 212 fixed on the push resistance plate 211 is connected to the outer groove 311. One end of the groove knife holder 222 is in contact with the inclined surface, so that it moves in the direction of the inner groove sleeve 31, the first telescopic spring 224 is compressed, and the outer groove knife 223 protrudes from the second chute 2211 and moves in the direction of the inner groove sleeve 31. The outer surface of the pipe material is in contact. At this time, the inner groove knife 36 and the outer groove knife 223 simultaneously cut metal on the inner surface and the outer surface of the pipe material at the same radially symmetrical position on the inner and outer surfaces of the pipe material to perform grooving. The resulting section defects are improved to improve production efficiency, and solve the problem that the existing metal pipe material in the low-stress cutting process cannot be grooved on the inner surface of the medium and large diameter thick-walled pipe material, and the inner surface of the pipe material obtained by the existing cutting method will be There are obvious loops and tearing defects, and it is difficult to meet the flatness requirements of the blanking section in industrial practice.

Referring to Figures 1-5, 7 and 9-11, the blanking assembly 40 includes a blanking bracket 41, a blanking roller 42, a roller bracket 43, a roller 44 and a second telescopic spring 45, and one end of the blanking bracket 41 is provided with Inside the first chute 161, one end of the unloading bracket 41 is located outside the first chute 161, the shape of the unloading bracket 41 is adapted to the shape of the first chute 161, and the roller bracket 43 is installed on the unloading support At the other end of 41, the roller 44 is rotatably connected to the inner side of the roller bracket 43, the feeding roller 42 is rotatably connected to the inner other side of the roller bracket 43, the surface of the roller 44 is in contact with the outer groove opening device 22, and the roller bracket 43 is connected with The first chute 161 is slidably connected, one end of the second telescopic spring 45 is connected to the first chute 161 , the other end of the second telescopic spring 45 is connected to the blanking bracket 41 , and the second elastic spring 45 is used to make the blanking bracket 41 Reset, keep the movement trend of the blanking bracket 41 away from the inner groove sleeve 31, the roller 44 is in contact with the side of the wedge block 221 away from the outer groove push block 212, and the side of the wedge block 221 in contact with the roller 44 is set as an inclined surface, and the open After the groove is completed, the hydraulic push plate 12 is retracted so that the guide post 15 extends from the sleeve rod 14, and the inner groove push rod 32 is retracted into the main shaft 11. Under the action of the tension spring 37, the outer groove tool holder 222 and the outer groove knife 223 After retracting the inside of the inner groove sleeve 31, the hydraulic push plate 12 suspends the action immediately, and then the hydraulic push rod 13 retracts to drive the inner groove sleeve 31 to retract into the main shaft 11, and the hydraulic push plate 12 continues to move back, driving the wedge 221 to drive the rollers 44 rolls, the outer groove push block 212 is separated from the outer groove tool holder 222, the first telescopic spring 224 pushes the outer groove tool holder 222 to retract the outer groove knife 223 into the second chute 2211, the roller 44 drives the blanking bracket 41 and the roller The bracket 43 moves toward the inner groove sleeve 31, and the blanking bracket 41 drives the blanking roller 42 to contact the pipe material and press down, increasing the retracting distance of the hydraulic push plate 12 and increasing the displacement load of the blanking roller 42 on the pipe material, so as to realize Unloading operation.

Referring to Figures 1-14, the present invention also proposes a working method of a low-stress blanking device for synchronously grooving inside and outside of medium and large-diameter thick-walled pipes, including the following steps:

S1, pipe material installation, fix the pipe material;

S2, the inner and outer grooves are opened, and the inner groove sleeve 31 is slid and fed to a predetermined position on the pipe material in the first hole position 111 inside the main shaft 11 under the pushing action of the hydraulic push rod 13, and then the hydraulic push plate 12 is output in the hydraulic cylinder. Under the action of the shaft thrust, the inner groove push rod 32 is pushed by the telescopic link 33 to move the inner groove sleeve 31. After the guide column 15 is fully retracted into the sleeve rod 14, the hydraulic push plate 12 will continue to feed to push the wedge. The block 221 moves forward, the inner groove push rod 32 linked with the hydraulic push plate 12 pushes the inner groove tool holder 35 to rotate, and the inner groove knife 36 protrudes to the outside of the first groove 311 to contact the inner surface of the pipe material, and at the same time The outer groove push block 212 fixed on the thrust plate 211 is in contact with the inclined surface of one end of the outer groove tool holder 222, so that it moves toward the inner groove sleeve 31, and the outer groove knife 223 protrudes from the second chute 2211 with the pipe At this time, the inner groove knife 36 and the outer groove knife 223 simultaneously cut metal on the inner surface and the outer surface of the pipe material at the same radially symmetrical position on the inner and outer surfaces of the pipe material to perform grooving;

S3, unloading, after the grooving is completed, the hydraulic push plate 12 is retracted to make the guide post 15 protrude from the sleeve rod 14, and the inner groove push rod 32 is retracted into the main shaft 11. Under the action of the tension spring 37, the outer groove tool holder 222 and the outer grooved knife 223 retract into the inner grooved sleeve 31, and the hydraulic push plate 12 suspends its action immediately. After that, the hydraulic push rod 13 retracts to drive the inner grooved sleeve 31 to retract into the main shaft 11, and the hydraulic push plate 12 continues to move back. The wedge block 221 is driven to drive the roller 44 to roll, and the feeding roller 42 contacts the pipe material and presses down, increasing the retraction distance of the hydraulic push plate 12 and increasing the displacement load of the feeding roller 42 on the pipe material to realize the feeding operation.

Specifically, after the pipe material is fixed, the inner groove sleeve 31 is slid and fed to a predetermined position on the pipe material in the first hole position 111 inside the main shaft 11 under the pushing action of the hydraulic push rod 13, and then the hydraulic push plate is performed. 12 is fed under the action of the thrust of the output shaft of the hydraulic cylinder, and pushes the inner groove push rod 32 to move the inner groove sleeve 31 through the telescopic link 33. After the guide column 15 is fully retracted into the sleeve rod 14, the hydraulic push plate 12 continues to move. The feeding pushes the wedge 221 forward, the inner groove push rod 32 linked with the hydraulic push plate 12 pushes the inner groove tool holder 35 to rotate, and the inner groove knife 36 protrudes to the outside of the first groove 311 and the inside of the pipe material. At the same time, the outer groove push block 212 fixed on the push resistance plate 211 is in contact with the inclined surface of one end of the outer groove tool holder 222, so that it moves toward the inner groove sleeve 31, the first expansion spring 224 is compressed, the outer groove The knife 223 protrudes from the second chute 2211 and moves in the direction of the inner groove sleeve 31 to contact the outer surface of the pipe material. At this time, the inner groove knife 36 and the outer groove knife 223 are radially symmetrical on the inner and outer surfaces of the pipe material respectively. At the position, the inner surface and outer surface of the pipe material are synchronously cut metal, and the groove is made. After the groove is completed, the hydraulic push plate 12 retracts so that the guide post 15 extends from the sleeve rod 14, and the inner groove push rod 32 is retracted. The main shaft 11 , under the action of the tension spring 37 , the outer grooved tool holder 222 and the outer grooved knife 223 retract into the inner grooved sleeve 31 , the hydraulic push plate 12 is suspended immediately, and then the hydraulic push rod 13 retreats to drive the inner grooved sleeve 31 When retracted into the main shaft 11, the hydraulic push plate 12 continues to move backward, driving the wedge block 221 to drive the roller 44 to roll, the outer groove push block 212 is separated from the outer groove tool holder 222, and the first telescopic spring 224 pushes the outer groove tool holder 222 to move the outer groove The knife 223 retracts into the second chute 2211, the roller 44 drives the blanking support 41 and the roller support 43 to move towards the inner groove sleeve 31, the blanking support 41 drives the blanking roller 42 to contact the pipe material and press down, increasing the hydraulic pressure The retracting distance of the push plate 12 increases the displacement load of the feeding roller 42 acting on the pipe material, and realizes the feeding operation. The whole operation process only needs to be operated on the same equipment, and the grooving and feeding operations can be realized simultaneously through the reverse linkage mechanism. The blanking process does not need to be carried out in the bearing. After the medium and large diameter pipe material is blanked, it is not easy to form the phenomenon that the pipe material is suspended and stuck in the bearing, which is easy to take out and solves the existing problems in the low-stress blanking process of the existing metal pipe material. The inner surface of the medium and large diameter thick-walled pipe material cannot be grooved. The inner surface of the pipe material obtained by the existing cutting method will produce obvious loops and tearing defects, and it is difficult to meet the flatness requirements of the cutting section in industrial practice. The operation is cumbersome, time-consuming and labor-intensive, and it is inconvenient to take out.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. The inside and outside synchronous grooved low stress unloader of medium and large diameter thick wall pipe material, its characterized in that includes:

the power mechanism component comprises a main shaft, a hydraulic push disc, a hydraulic push rod, a loop bar, a guide pillar and a fixed disc;

the hydraulic push rod is connected with the main shaft in a sliding manner, the loop bar is installed on one side of the surface of the hydraulic push disc, one end of the hydraulic push rod is inserted into the loop bar, and the other end of the hydraulic push rod penetrates through one side of the fixed disc and extends to the outside of the fixed disc;

the outer tank assembly comprises a pushing resistance device and an outer tank opening device;

the pushing prevention device is arranged on one side of the fixed disc, the outer groove opening device is connected with the other end of the guide pillar, and the surface of the outer groove opening device is in contact with the surface of the pushing prevention device;

the inner groove assembly comprises an inner groove sleeve, an inner groove push rod, a telescopic connecting rod, a guide block, an inner groove cutter holder, an inner groove cutter and a tension spring;

wherein, one side of the surface of the inner groove sleeve is sequentially provided with a first groove and a second groove, the guide block is arranged at one end of the surface of the inner groove sleeve close to the second groove, the outer wall of the guide block is connected with the inside of the second guide groove in a sliding way, the guide block is connected with the other end of the hydraulic push rod, the inner groove tool holders are arranged inside the inner groove sleeve, one end of each inner groove tool holder is rotationally connected with the inner groove sleeve, the inner groove tool is arranged at the other end of the inner groove tool holder, the number of the first groove, the inner groove tool and the inner groove tool holders is two, the axes of the inner groove sleeve are symmetrically distributed at the other side of the inner groove sleeve, the two inner groove tool holders are connected through a tension spring, one end of a telescopic connecting rod is inserted inside the inner groove sleeve, and one end of the telescopic connecting rod is rotationally connected with the hydraulic push disc, the other end of the telescopic connecting rod is rotatably connected with one end of the telescopic connecting rod, and the outer wall of the telescopic connecting rod is in clearance fit with the inner wall of the second guide groove;

the blanking assembly comprises a blanking support, a blanking roller, a roller support, a roller and a second telescopic spring, one end of the blanking support is arranged in the first sliding groove, one end of the blanking support is located outside the first sliding groove, the roller support is installed at the other end of the blanking support, the roller is rotatably connected to one side of the inside of the roller support, the blanking roller is rotatably connected to the other side of the inside of the roller support, the surface of the roller is in contact with the outer groove, the roller support is in sliding connection with the first sliding groove, one end of the second telescopic spring is connected with the first sliding groove, and the other end of the second telescopic spring is connected with the blanking support.

2. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 1 is characterized in that: the size of the first hole site is consistent with the aperture of the second hole site, and the axis of the first hole site is positioned on the same straight line with the axis of the second hole site.

3. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 1 is characterized in that: a third guide groove is formed in one side of the loop bar, a clamping block is arranged on one side of the guide pillar, and the outer wall of the clamping block is connected with the inner wall of the third guide groove in a sliding mode.

4. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 1 is characterized in that: the pushing device comprises a pushing plate and an outer groove pushing block, the pushing plate is mounted on one side, close to the first sliding groove, of the surface of the fixed disc, and the outer groove pushing block is mounted on one side, close to the fixed disc, of the pushing plate.

5. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 4 is characterized in that: the outer groove forming device comprises a wedge block, an outer groove cutter holder, an outer groove cutter and a first telescopic spring, one side, close to the fixed disc, of the wedge block is fixedly connected with the other end of the guide pillar, a second sliding groove is formed in one side of the wedge block, the outer groove cutter holder is arranged inside the second sliding groove, the outer groove cutter is arranged at one end, away from the outer groove push block, of the outer groove cutter holder, and one end, close to the outer groove push block, of the outer groove cutter holder extends to the outside of the second sliding groove and is in contact with the outer groove push block.

6. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 5 is characterized in that: the outer groove push block is triangular, one end, close to the outer groove push block, of the outer groove tool holder is arranged to be an inclined surface, the inclined surface is in contact with the outer groove push block, and the first telescopic spring is arranged between the outer groove tool holder and the second sliding groove.

7. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 1 is characterized in that: the inner groove tool holder and the inner groove tool are used for rotating inside the first groove by taking one end of the inner groove tool holder as a rotating shaft, so that the inner groove tool rotates to the outside of the first groove.

8. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 5 is characterized in that: the roller is in contact with one side, far away from the outer groove pushing block, of the surface of the wedge block, and the side, in contact with the roller, of the wedge block is provided with an inclined surface.

9. The low-stress blanking device for synchronously grooving the inside and the outside of the medium-large diameter thick-wall pipe material according to claim 1 is characterized in that: the hydraulic push disc and the hydraulic push rod are respectively connected with a hydraulic cylinder for providing power.

10. An operating method of a low-stress blanking device for synchronously grooving inside and outside of a medium-large diameter thick-wall pipe material according to any one of claims 1 to 9 is characterized in that: the method comprises the following steps:

s1, mounting the pipe material, and fixing the pipe material;

s2, forming an inner groove and an outer groove, the inner groove sleeve slides and feeds to a set position on the pipe material in a first hole position in the main shaft under the pushing action of a hydraulic push rod, then a hydraulic push disk feeds under the pushing action of a hydraulic cylinder output shaft, the inner groove push rod is pushed to move in the inner groove sleeve through a telescopic connecting rod, after a guide post completely stretches into the sleeve rod, the hydraulic push disk continues to feed to push a wedge block to move forwards, an inner groove push rod linked with the inside of the hydraulic push disk pushes an inner groove cutter holder to rotate, an inner groove cutter extends out of a first groove to be contacted with the inner surface of the pipe material, an outer groove push block fixed on a resistance push plate is contacted with an inclined surface at one end of the outer groove cutter holder to move towards the inner groove sleeve, an outer groove cutter extends out of a second sliding groove to be contacted with the outer surface of the pipe material, and the inner groove cutter and the outer groove cutter synchronously cut metal on the inner surface and the outer surface of the pipe material at the same radial symmetrical position in the inner groove and the outer surface of the pipe material respectively, grooving is carried out;

s3, blanking, after slotting, returning the hydraulic push disc to extend the guide post from the loop bar, and returning the inner groove push rod to the main shaft, retracting the outer groove cutter holder and the outer groove cutter to the inner part of the inner groove sleeve under the action of the tension spring, the hydraulic push disc then pauses action, then returning the hydraulic push rod to drive the inner groove sleeve to retract to the main shaft, continuing to return the hydraulic push disc to drive the wedge block to drive the roller to roll, simultaneously contacting and pressing the blanking roller to the pipe, increasing the return distance of the hydraulic push disc to improve the displacement load of the blanking roller on the pipe, and realizing blanking operation.

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