CN217859139U

CN217859139U - Positioning tool for machining elbow joint

Info

Publication number: CN217859139U
Application number: CN202222015166.3U
Authority: CN
Inventors: 符传岭; 张裕忠; 薛松
Original assignee: Nanjing Baokaitong Machinery Equipment Co ltd
Current assignee: Nanjing Baokaitong Machinery Equipment Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-22
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to a positioning tool is used in elbow fitting processing, it relates to elbow fitting processing equipment field, and it includes the bottom plate and is used for centre gripping elbow fitting's centre gripping subassembly, centre gripping subassembly rotates to set up on the bottom plate, be equipped with on the bottom plate and be used for the drive centre gripping subassembly pivoted drive assembly, be equipped with the positioning component who is used for restricting first port, second port and cutter alignment on the bottom plate. This application has the effect that improves elbow fitting machining efficiency.

Description

Positioning tool for machining elbow joint

Technical Field

The application relates to the field of elbow joint machining equipment, in particular to a positioning tool for machining an elbow joint.

Background

Elbow fittings, one of the standard components of pipelines, have great application in industrial production, and in daily pipeline applications, elbow fittings of different angles and diameters need to be used, and the most widely used elbow fittings on the market currently have angles of 90 degrees, 45 degrees, 60 degrees and 180 degrees.

Clamping positioning tool is as the important equipment in elbow fitting's the processing equipment, and the quality of elbow fitting processing is directly influenced to the degree of accuracy of its location, and in right angle elbow fitting's processing, elbow fitting contains first port and second port, and on the elbow fitting fixed clamping equipment was first usually, then through the cutter to first port processing back, the elbow fitting was transferred afterwards, and rethread cutter processing second port.

Aiming at the technical scheme, the inventor finds that when two end faces of the right-angle elbow joint are machined, the elbow joint needs to be clamped twice by the clamping assembly, and the elbow joint needs to be positioned in the second clamping process, so that the machining quality of the elbow joint is ensured, and a large amount of non-machining time is occupied in each clamping process, so that the machining efficiency of the elbow joint is low.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem of the efficiency of elbow fitting processing, this application provides a positioning tool for elbow fitting processing.

The application provides a pair of positioning tool for elbow joint processing adopts following technical scheme:

a positioning tool for machining a bent pipe joint comprises a bottom plate and a clamping assembly for clamping the bent pipe joint, wherein the clamping assembly is rotatably arranged on the bottom plate, a driving assembly for driving the clamping assembly to rotate is arranged on the bottom plate, and a positioning group for limiting a first port and a second port to be aligned with a cutter is arranged on the bottom plate;

the clamping assembly comprises two clamping blocks, one clamping block and the bottom plate are rotatably arranged, clamping grooves are formed in opposite side walls of the two clamping blocks, the two clamping grooves correspond to each other one by one, the two clamping grooves jointly enclose a clamping space for clamping the elbow joint, the first port and the second port extend out of the clamping space, and an adjusting piece for driving the two clamping grooves to close and separate is arranged on each clamping block;

the bottom plate is provided with an adjusting hole, one side of the clamping block close to the bottom plate is provided with a rotating rod, and the rotating rod is inserted into the adjusting hole and is in rotating connection with the adjusting hole;

locating component sets up including sliding two locating levers on the regulation hole lateral wall, one of them the locating lever is used for the restriction first port aligns with the processing cutter, and another one the locating lever is used for the restriction the second port aligns with the processing cutter, two the parallel just antarafacial of axis of locating lever, be equipped with the confession on the dwang locating lever male slot, two the axis mutually perpendicular of slot.

By adopting the technical scheme, when the elbow joint is machined, the elbow joint is clamped through the clamping assembly, then the driving assembly drives the clamping assembly to rotate the clamping assembly, the first port is aligned with the machining tool, then the first port of the elbow joint is machined through the tool, after machining is finished, the driving assembly drives the clamping assembly to rotate the clamping assembly again, the positioning assembly aligns the second port of the elbow joint with the tool, and then the tool is used for machining the second port, so that the machining of the elbow joint is realized, and the machining efficiency of the elbow joint is improved;

when the elbow joint is clamped, the two clamping blocks are opened through the adjusting piece, then the elbow joint is placed in the clamping groove, and then the two clamping blocks are closed through the adjusting piece, so that the elbow joint is located in the clamping space, the elbow joint is fixed, and the fixing speed of the elbow joint is improved;

when fixing a position elbow fitting, the rotation dwang rotates, when elbow fitting's first port and cutter align, one of them locating lever inserts the draw-in groove in order to form the location to elbow fitting, after first port processing is accomplished, take out the locating lever from the draw-in groove, remove the restriction to elbow fitting, the dwang is rotated once more this moment, when second port aligns with the cutter, another locating lever inserts the slot, thereby form the location to elbow fitting, improve elbow fitting positioning accuracy when rotating, and then improve elbow fitting processingquality.

In a specific practical implementation scheme, the adjusting part comprises an adjusting screw rod arranged on the clamping blocks, the adjusting screw rod penetrates through the two clamping blocks, the adjusting screw rod is in threaded connection with one of the clamping blocks, the adjusting screw rod is in rotational connection with the other clamping block, and an adjusting motor used for driving the adjusting screw rod to rotate is arranged on the clamping blocks.

Through adopting above-mentioned technical scheme, when fixing elbow fitting, drive adjustment motor rotates, then adjustment motor drives the screw rod and rotates, and the screw rod drives two grip blocks alternate segregation for two grip blocks are in the open mode, and after placing elbow fitting and accomplishing, drive adjustment motor reversal, the screw rod drives a grip block and moves towards another grip block, thereby makes two grip blocks be in the closed mode, thereby realizes grip block fixed to elbow fitting.

In a specific embodiment, be equipped with the confession on the bottom plate the spring annular that the locating lever penetrated, the spring groove with the locating lever one-to-one, the cover is equipped with positioning spring on the locating lever, positioning spring is located in the spring annular, be equipped with the baffle on the locating lever, the baffle is located the spring annular is close to one side of regulation hole, positioning spring's one end with the baffle is connected, positioning spring's other one end with the spring annular lateral wall is connected, be equipped with in the bottom plate and be used for adsorbing the locating lever is towards keeping away from the electro-magnet that the regulation hole direction removed, the electro-magnet with the locating lever one-to-one.

Through adopting above-mentioned technical scheme, when the locating lever was to the location, rely on positioning spring to promote the locating lever and slide on the dwang, when elbow fitting's terminal surface was aimed at the cutter, the locating lever relied on inserting the draw-in groove under positioning spring's the promotion to improve the promptness that the locating lever inserted the draw-in groove, when the locating lever removed the restriction to the dwang, switched on the electro-magnet this moment, the electro-magnet was with the locating lever from the suction in the draw-in groove suction, thereby improved the convenience that the draw-in groove was taken out to the locating lever.

In a specific embodiment, the driving assembly includes a driving motor for driving the rotation rod to rotate, and the driving motor is connected with the rotation rod through a transmission member.

Through adopting above-mentioned technical scheme, when rotating the dwang, open driving motor and rotate, driving motor passes through the driving medium and drives the dwang rotation to improve dwang pivoted convenience.

In a specific embodiment, the dwang is being close to driving motor's one end is equipped with the rotating groove, be equipped with the dashpot on the rotating groove lateral wall, the driving medium sets up including sliding buffer block in the dashpot, the buffer block with the dashpot groove diapire passes through buffer spring and connects, driving motor's output shaft inserts the rotating groove, driving motor's output shaft is equipped with in the one end that inserts the rotating groove and is used for driving the buffer block rotates or promotes the buffer block towards the dog that the dashpot diapire removed.

Through adopting above-mentioned technical scheme, when driving motor drives the dwang and rotates, dog and buffer block laminating this moment, dog extrusion buffer block, the buffer block supports tightly with the dog under buffer spring's support, the dog drives the buffer block and rotates this moment, the buffer block drives the dwang and rotates, when the locating rod inserts the draw-in groove, the dwang scram, the dog increases suddenly to the thrust of buffer block, the dog promotes the buffer block and removes towards buffer slot diapire direction, make the dog cross the buffer block and take place the idle running, thereby reduce the harm that the dwang scram caused driving motor.

In a specific possible implementation scheme, a buffering inclined plane is arranged on the buffering block, the distance from the buffering inclined plane to the symmetry axis of the buffering block is gradually reduced from one side close to the bottom wall of the buffering groove to one side far away from the bottom wall of the buffering groove, and the stop block is abutted against the buffering inclined plane.

Through adopting above-mentioned technical scheme, utilize the buffering inclined plane to realize that the dog promotes the buffer block and removes towards buffer slot diapire direction.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the elbow connector is machined, the elbow connector is clamped through the clamping assembly, then the clamping assembly is driven to rotate through the driving assembly, the elbow connector is positioned through the positioning assembly, so that the first port is aligned with the cutter, the first port is machined through the cutter, then the clamping assembly rotates again, the elbow connector is positioned through the positioning assembly again, so that the second port is aligned with the cutter, then the cutter is used for machining the second port, the integral machining of the elbow connector is achieved, and the machining efficiency of the elbow connector is improved;

2. when the elbow joint is clamped, the screw rod is driven to rotate through the adjusting motor, so that the two clamping blocks are opened, the elbow joint is placed in the clamping groove, and the screw rod is driven to rotate through the adjusting motor so that the two clamping blocks are closed, and the elbow joint is clamped;

3. when fixing a position elbow fitting, the locating lever slides along the dwang under positioning spring's promotion, when first port aligns with the cutter, the draw-in groove is inserted to the dwang, realize the first location to elbow fitting, after first port processing is accomplished, with the sucking of locating lever in the draw-in groove through the electro-magnet, then rotate the dwang, after second port aligns with the cutter, another draw-in groove is inserted to another locating lever this moment, realize the secondary positioning to elbow fitting, after second port processing is accomplished, with the electro-magnet with the sucking of locating lever from the draw-in groove, and then begin new course of working, thereby realize the location to elbow fitting at the rotation in-process, improve the degree of accuracy of location, and then improve elbow fitting processingquality.

Drawings

Fig. 1 is a schematic structural diagram of a positioning tool for elbow joint machining according to an embodiment of the present application.

Fig. 2 is an exploded view for showing the clamping assembly.

Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 4 is an exploded view for showing the positioning assembly.

Fig. 5 is a sectional view taken along line B-B in fig. 2.

Fig. 6 is an exploded view showing a buffer block.

Description of reference numerals: 1. a base plate; 2. a pipe bending joint; 21. a first port; 22. a second port; 3. a clamping assembly; 31. a clamping block; 32. a clamping groove; 33. a clamping space; 34. an adjustment member; 341. adjusting the motor; 342. adjusting the screw rod; 343. a guide bar; 4. a drive assembly; 41. a drive motor; 42. a transmission member; 421. a rotating groove; 422. a buffer tank; 423. a buffer block; 424. a buffer spring; 425. a buffer bevel; 426. a stopper; 5. a positioning assembly; 511. an adjustment hole; 512. rotating the rod; 513. a first regulating groove; 514. a second adjustment groove; 52. positioning a rod; 521. a first positioning rod; 522. a second positioning rod; 53. a slot; 531. a first slot; 532. a second slot; 54. a spring ring groove; 55. a positioning spring; 56. a baffle plate; 57. an electromagnet.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses positioning tool for machining of elbow joints.

Referring to fig. 1 and 2, a positioning tool for elbow joint machining includes a bottom plate 1 and a clamping assembly 3 for clamping elbow joint 2, clamping assembly 3 in this embodiment includes two clamping blocks 31 rotatably disposed on bottom plate 1, the two clamping blocks 31 are disposed from top to bottom, clamping grooves 32 for elbow joint 2 to be placed are disposed on opposite side walls of the two clamping blocks 31, the two clamping grooves 32 are in one-to-one correspondence and are disposed oppositely, two clamping grooves 32 jointly enclose a clamping space 33 for clamping elbow joint 2, clamping space 33 extends out of first port 21 and second port 22, adjusting parts 34 for closing and separating the two clamping blocks 31 are disposed on the clamping blocks 31, a driving assembly 4 for driving the clamping blocks 31 to rotate is disposed on the bottom plate 1, and a positioning assembly 5 for limiting first port 21 and aligning second port 22 with a machining tool is disposed on the bottom plate 1.

When the port of the elbow joint 2 is machined, firstly, the two clamping blocks 31 are separated through the adjusting piece 34, the elbow joint 2 is placed in the clamping groove 32, then the two clamping blocks 31 are closed through the adjusting piece 34, the elbow joint 2 is located in the clamping space 33, then the clamping blocks 31 are driven to rotate through the driving assembly 4, the first port 21 is aligned with a cutter through the positioning assembly 5, then the first port 21 is machined through the cutter, the clamping blocks 31 are driven to rotate through the driving assembly 4 again after machining is finished, the second port 22 is aligned with the cutter through the positioning assembly 5, then the cutter is utilized to machine the second port 22, machining of the elbow joint 2 is achieved, and machining efficiency of the elbow joint 2 is improved.

Referring to fig. 1 and 2, the adjusting member 34 in this embodiment includes an adjusting motor 341 disposed on the upper clamping block 31, an adjusting screw 342 is coaxially disposed at an output end of the adjusting motor 341, the adjusting screws 342 are inserted into both clamping blocks 31, and the adjusting screw 342 is rotatably connected to the upper clamping block 31. The adjusting screw 342 is in threaded connection with the lower clamping block 31, a guide rod 343 is arranged on the lower clamping block 31, the axis of the guide rod 343 is parallel to the axis of the guide rod 343, and the guide rod 343 is in sliding connection with the upper clamping block 31.

When the clamping block 31 is adjusted, the adjusting motor 341 is turned on, the adjusting motor 341 drives the adjusting screw 342 to rotate, so that the clamping block 31 above moves towards the clamping block 31 below, at this time, the guide rod 343 slides with the clamping block 31 above, the stability of the movement of the clamping block 31 is improved, so that the two clamping blocks 31 are in an open state, after the elbow joint 2 is placed, the adjusting motor 341 is driven to rotate reversely, so that the clamping block 31 above moves towards the clamping block 31 below, so that the two clamping blocks 31 are in a closed state, so that the elbow joint 2 is placed in a clamping state, and the convenience in moving the clamping block 31 is improved.

Referring to fig. 3 and 4, an adjusting hole 511 is formed in the bottom plate 1, a rotating rod 512 for inserting the adjusting hole 511 is formed in the holding block 31, the rotating rod 512 is rotatably connected with the adjusting hole 511, a first adjusting groove 513 and a second adjusting groove 514 are formed in a side wall of the adjusting hole 511, an axis of the first adjusting groove 513 is parallel to and opposite to an axis of the second adjusting groove 514, an axis of the first adjusting groove 513 and an axis of the second adjusting groove 514 are perpendicular to the axis of the rotating rod 512, the positioning assembly 5 in the present embodiment includes a positioning rod 52 disposed in the first adjusting groove 513 and the second adjusting groove 514, the positioning rod 52 includes a first positioning rod 521 and a second positioning rod 522, the first positioning rod 521 and the second positioning rod 522 in the present embodiment are both stainless steel rods, the first positioning rod 521 is slidably connected with the first adjusting groove 513, and the second positioning rod 522 is slidably connected with the second adjusting groove 514.

Referring to fig. 3 and 4, the slot 53 is disposed on the rotating rod 512, the slot 53 includes a first slot 531 and a second slot 532, the first slot 531 and the second slot 532 are uniformly disposed along an axis of the rotating rod 512, a sliding distance of the first positioning rod 521 in the first adjusting slot 513 is greater than a depth of the first slot 531, a sliding distance of the second positioning rod 522 in the second adjusting slot 514 is greater than a depth of the second slot 532, when the first port 21 is aligned with the cutter, the first positioning rod 521 is inserted into the first slot 531, and when the second port 22 is aligned with the cutter, the second rotating rod 512 is inserted into the second slot 532.

Referring to fig. 3 and 4, the side walls of the first adjusting groove 513 and the second adjusting groove 514 are both provided with a spring ring groove 54, the first positioning rod 521 and the second positioning rod 522 are both sleeved with a positioning spring 55, the positioning spring 55 is located in the spring ring groove 54, the first positioning rod 521 and the second positioning rod 522 are both provided with a baffle 56, the baffle 56 is located on one side of the spring ring groove 54 close to the rotating rod 512, one end of the positioning spring 55 is fixedly connected with the baffle 56, the other end of the positioning spring 55 is fixedly connected with the side wall of the spring ring groove 54, the first adjusting groove 513 and the second adjusting groove 514 are both provided with an electromagnet 57 on one side away from the rotating rod 512, the electromagnet 57 adsorbs the first positioning rod 521, the second positioning rod 522 moves towards the direction away from the rotating rod 512, and both the first positioning rod 521 and the second positioning rod 522 slide along the rotating rod 512.

When the elbow joint 2 is positioned, the rotating rod 512 drives the clamping block 31 to rotate, at this time, the positioning spring 55 pushes the first positioning rod 521 and the second positioning rod 522 to slide along the side wall of the rotating rod 512, when the first port 21 is aligned with the cutter, the first positioning rod 521 is pushed by the positioning spring 55 to be inserted into the first slot 531, then the cutter processes the first port 21, after the first port 21 is processed, the electromagnet 57 is energized, the electromagnet 57 adsorbs the first positioning rod 521 and sucks the first positioning rod 521 out of the first slot 531, so that the limitation of the rotating rod 512 is removed, at this time, the rotating rod 512 is rotated again, when the second port 22 is aligned with the cutter, the second positioning rod 522 is pushed by the positioning spring 55 to be inserted into the second slot 532, so that the elbow joint 2 is positioned, after the second port 22 is processed, the electromagnet 57 is energized, the rotating rod 57 sucks the second positioning rod 522 out of the second slot 532, so that the elbow joint 512 can continue to rotate, so that the positioning when the elbow joint 2 is processed is realized.

Adopt first locating lever 521 and the gliding mode of second locating lever 522 on dwang 512 lateral wall for in time inject slot 53 into with second locating lever 522 first locating lever 521, thereby improve the positioning accuracy of elbow fitting 2, and then improve elbow fitting 2's processingquality.

Referring to fig. 5 and 6, the driving assembly 4 in this embodiment includes a driving motor 41 disposed on the bottom plate 1, the driving motor 41 is disposed on one side of the bottom plate 1 away from the clamping block 31, the driving motor 41 is connected to the rotating rod 512 through a transmission member 42, the rotating rod 512 is provided with a rotating groove 421 on one side close to the driving motor 41, the axis of the rotating groove 421 is collinear with the axis of the rotating rod 512, buffer grooves 422 are disposed on the side wall of the rotating groove 421, the number of the buffer grooves 422 is two, the two buffer grooves 422 are uniformly disposed along the circumferential direction of the rotating groove 421, the transmission member 42 in this embodiment includes a buffer block 423 slidably disposed in each buffer groove 422, a buffer spring 424 is disposed between the buffer block 423 and the bottom wall of the buffer groove 422, one end of the buffer spring 424 is fixedly connected to the buffer block 423, the other end of the buffer spring 424 is fixedly connected to the bottom wall of the buffer groove 422, the buffer groove 422 is provided with a buffer bevel 425 at one end far from the bottom wall of the buffer groove 422, the distance from the buffer bevel 425 to the symmetric axis 423 of the buffer block 423 is gradually reduced from one side close to the bottom wall of the buffer groove 422, an output of the bottom wall of the buffer groove 422 is provided with the output shaft of the driving motor 41, the buffer motor 426 is provided with two bevel 425, the buffer stops 426, the shaft 426, the buffer groove 426, the shaft end of the buffer groove 422 is disposed along the buffer groove 426, the sliding motor 426, and the shaft 426, the buffer block 426, and the shaft of the buffer block 426, and the shaft are uniformly disposed along the shaft, and the shaft end of the buffer groove 422, and the shaft are uniformly disposed along the shaft 426, and the shaft of the buffer groove 422, and the shaft end of the shaft 426 of the buffer block 422.

When driving motor 41 drives elbow fitting 2 and rotates, under buffer spring 424's promotion, dog 426 promotes the rotation of buffer block 423, buffer block 423 drives dwang 512 and rotates, when locating rod 52 inserts slot 53, dwang 512 scram, the thrust increase between dog 426 and the buffer block 423, dog 426 slides on buffering inclined plane 425, dog 426 promotes buffer block 423 and removes towards buffer slot 422 tank bottom wall direction, thereby make dog 426 cross buffer block 423 and take place the idle running, thereby effectively avoid the scram of dwang 512 to cause the damage to driving motor 41.

The implementation principle of the positioning tool for machining the elbow joint in the embodiment of the application is as follows: adding man-hour to elbow fitting 2, realize elbow fitting 2's centre gripping through clamping component 3, then drive assembly 4 drive clamping component 3 rotates, then realize first port 21 and cutter alignment through locating component 5, the cutter is processed first port 21, then clamping component 3 rotates, realize second port 22 and cutter alignment through locating component 5 once more, the cutter is processed second port 22, after the processing is accomplished, open clamping component 3, elbow fitting 2 after will processing is accomplished takes out, thereby realize elbow fitting 2's processing, and improve elbow fitting 2's machining efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a positioning tool is used in processing of elbow fitting which characterized in that: the clamping device comprises a bottom plate (1) and a clamping assembly (3) used for clamping a bent pipe joint (2), wherein the clamping assembly (3) is rotatably arranged on the bottom plate (1), a driving assembly (4) used for driving the clamping assembly (3) to rotate is arranged on the bottom plate (1), and a positioning assembly (5) used for limiting a first port (21) and a second port (22) to be aligned with a cutter is arranged on the bottom plate (1);

the clamping assembly (3) comprises two clamping blocks (31), one of the clamping blocks (31) is rotatably arranged with the base plate (1), clamping grooves (32) are formed in opposite side walls of the two clamping blocks (31), the two clamping grooves (32) are in one-to-one correspondence, the two clamping grooves (32) jointly enclose a clamping space (33) for clamping the elbow joint (2), the first port (21) and the second port (22) both extend out of the clamping space (33), and an adjusting piece (34) for driving the two clamping grooves (32) to be closed and separated is arranged on the clamping block (31);

the bottom plate (1) is provided with an adjusting hole (511), one side of the clamping block (31) close to the bottom plate (1) is provided with a rotating rod (512), and the rotating rod (512) is inserted into the adjusting hole (511) and is rotatably connected with the adjusting hole (511);

locating component (5) is including sliding the setting two locating levers (52) on regulation hole (511) lateral wall, one of them locating lever (52) are used for restricting first port (21) align with the processing cutter, another one locating lever (52) are used for restricting second port (22) align with the processing cutter, two the axis of locating lever (52) is parallel and the antarafacial, be equipped with on dwang (512) and supply locating lever (52) male slot (53), two the axis mutually perpendicular of slot (53).

2. The positioning tool for machining the elbow joint according to claim 1, characterized in that: the adjusting part (34) comprises an adjusting screw (342) arranged on the clamping block (31), the adjusting screw (342) penetrates through the two clamping blocks (31), the adjusting screw (342) is in threaded connection with one of the clamping blocks (31), the adjusting screw (342) is in rotary connection with the other clamping block (31), and an adjusting motor (341) used for driving the adjusting screw (342) to rotate is arranged on the clamping block (31).

3. The positioning tool for machining the elbow joint according to claim 1, wherein the positioning tool comprises: be equipped with the confession on bottom plate (1) spring annular (54) that locating lever (52) penetrated, spring annular (54) with locating lever (52) one-to-one, the cover is equipped with positioning spring (55) on locating lever (52), positioning spring (55) are located in spring annular (54), be equipped with baffle (56) on locating lever (52), baffle (56) are located spring annular (54) are close to the one side of regulation hole (511), the one end of positioning spring (55) with baffle (56) are connected, the other one end of positioning spring (55) with spring annular (54) lateral wall is connected, be equipped with in bottom plate (1) and be used for adsorbing locating lever (52) are towards keeping away from adjust electromagnet (57) of hole (511) direction removal, electromagnet (57) with locating lever (52) one-to-one.

4. The positioning tool for machining the elbow joint according to claim 1, wherein the positioning tool comprises: drive assembly (4) are including being used for the drive dwang (512) pivoted driving motor (41), driving motor (41) with dwang (512) is connected through driving medium (42).

5. The elbow fitting machining positioning tool according to claim 4, characterized in that: dwang (512) is being close to the one end of driving motor (41) is equipped with rotation groove (421), be equipped with buffer slot (422) on rotation groove (421) lateral wall, driving medium (42) are in including sliding setting buffer block (423) in buffer slot (422), buffer block (423) with buffer slot (422) tank bottom wall passes through buffer spring (424) and connects, the output shaft of driving motor (41) inserts rotation groove (421), the output shaft of driving motor (41) is being equipped with in the one end of inserting rotation groove (421) and is being used for driving buffer block (423) rotates or promotes buffer block (423) towards dog (426) that buffer slot (422) diapire removed.

6. The positioning tool for machining the elbow joint according to claim 5, wherein the positioning tool comprises: be equipped with buffering inclined plane (425) on buffer block (423), buffering inclined plane (425) to the distance of buffer block (423) symmetry axis has and is close to one side of buffer slot (422) diapire to keeping away from one side of buffer slot (422) diapire reduces gradually, dog (426) with buffering inclined plane (425) contradict.