阅读说明：本技术 一种液压管件加工工艺 (Machining process for hydraulic pipe fitting ) 是由 查辰 查国金 徐正全 于 2021-06-08 设计创作，主要内容包括：本发明涉及一种液压管件加工工艺,其特征在于：包括如下步骤：S1：裁管、S2：主管开孔、S3：折弯、S4：扩口、S5：第一次焊接固定、S6：第二次焊接固定；本发明中加工工艺所使用的工装不仅能用于切管工序,还能用于焊接工序,不仅降低了成本,而且该工装可以对切管的长度进行精确控制,大大增加了实用性能。(The invention relates to a hydraulic pipe fitting machining process, which is characterized by comprising the following steps of: the method comprises the following steps: s1: pipe cutting, S2: main pipe opening, S3: bending, S4: flaring, S5: first welding and fixing, S6: welding and fixing for the second time; the tool used in the processing technology can be used for not only the pipe cutting process but also the welding process, so that the cost is reduced, and the tool can accurately control the length of the cut pipe, thereby greatly increasing the practical performance.)

1. A hydraulic pipe fitting machining process is characterized in that: the method comprises the following steps:

s1: pipe cutting: selecting pipes with corresponding specifications and cutting the pipes into 4 lengths, wherein the four lengths of pipes are a main pipe, a first connecting pipe, a second connecting pipe and a transition pipe in sequence from long to short, and the number of the transition pipes is four;

s2: tapping of the main pipe: the main pipe is fixed, four first holes for connecting the transition pipe and four second holes for connecting the first joints are formed in the surface of the main pipe, and the first joints are fixed at the second holes in a welding mode;

s3: bending: sequentially bending one ends of the four transition pipes through a pipe bending machine;

s4: flaring: flaring is carried out to the both ends of first connecting pipe and second connecting pipe through tip flaring machine to all offer the third opening that is used for connecting the second and connects on the lateral wall of first connecting pipe and second connecting pipe:

s5: welding and fixing for the first time: a transition pipe is welded and fixed at two ends of the first connecting pipe and the second connecting pipe in sequence through a tool, and a second joint is welded and fixed at third openings of the first connecting pipe and the second connecting pipe;

s6: and (3) welding and fixing for the second time: and fixing the main pipe again, fixing four transition pipes connected to two ends of the first connecting pipe and two ends of the second connecting pipe at four first holes of the main pipe by welding, and respectively installing a third joint at two ends of the main pipe.

2. A process according to claim 1, wherein: the thickness of the processing pipe of the first connecting pipe is the same as that of the processing pipe of the second connecting pipe and that of the processing pipe of the transition pipe, and the thickness of the processing pipe of the main pipe is larger than that of the processing pipe of the first connecting pipe.

3. A process according to claim 1, wherein: the bottom welded fastening that the transition pipe was bent is in the first trompil department on being responsible for the outer wall, the other end of transition pipe stretches into in the flaring of first connecting pipe or second connecting pipe head and fixes through the welded mode after carrying out the chamfer, the transition pipe stretch into and still embedded cover is equipped with rubber seal on the outer wall of one end in first connecting pipe or the second connecting pipe flaring head.

4. A process according to claim 1, wherein: and the first connecting pipe, the second connecting pipe and the transition pipe in the step S1 are fixed by the same tool in the step S5 in the pipe cutting process, and then are formed by cutting with a pipe cutting tool.

5. A hydraulic pipe fitting machining process according to claim 4, wherein: the frock include U type base, supporting baseplate, roating seat, carousel, cut a tub fixed establishment and welded fastening mechanism, one end of supporting baseplate is connected in one side of U type base upper end and is linked into an organic whole rather than, the bottom of the supporting baseplate other end is provided with the spike and is the level form through the spike and places, the carousel fix the bottom in U type base, the vertical reference column that is fixed with in center department at carousel top, the roating seat rotate to be connected in the top of carousel and its bottom offer the connecting hole that is used for connecting the reference column, install the bearing in the connecting hole and rotate through bearing and reference column and be connected, the both sides wall of roating seat and U type base between still be provided with locking mechanical system, cut tub fixed establishment setting on the roating seat, welded fastening mechanism set up on supporting baseplate, cut tub fixed establishment include first curb plate, The first fixing clamp is fixed at the top of the second side plate and consists of an upper cover body and a lower cover body, semicircular clamping grooves are formed in the lower surface of the upper cover body and the upper surface of the lower cover body, one end of the lower cover body is rotatably connected with one end of the upper cover body through a pin shaft, the other end of the lower cover body is provided with a first connecting seat, the other end of the upper cover body is also provided with two second connecting seats, two screws are fixed on the first connecting seat, a through groove which is communicated up and down is formed in one side of the two second connecting seats relative to the positions of the two screws, the screws are further connected with locking nuts which are matched with the locking nuts to lock and fix the second connecting seats and the first connecting seats, the first guide seat is fixed at the top of the first translation seat and is flush with the lower cover body, the first translation seat is connected onto the first screw through a first flexible connector, the first guide rod penetrates through the first translation seat and is movably connected with the first translation seat, an extending part is further arranged at the bottom of the first guide seat, and a baffle shaped like a Chinese character 'ao' is further installed on the extending part.

6. A process according to claim 5, wherein: the bottom of the first guide seat is fixed with an installation part, one end of the installation part, which is far away from the first translation seat, is provided with a guide groove matched with the extension part, one end of the extension part is movably connected in the guide groove, the side wall of the installation part is also provided with a locking threaded hole communicated with the guide groove, the locking threaded hole is internally connected with a puller bolt, one end of the puller bolt penetrates through the locking threaded hole to extend into the guide groove and contact with the extension part, the concave baffle plate is rotatably connected on the other end of the extension part, the front side and the rear side of the extension part are respectively provided with a fixing screw rod, the fixing screw rods on the two sides respectively penetrate through the concave baffle plate, two locking nuts are respectively connected on the two fixing screw rods penetrating through the concave baffle plate, and the two locking nuts are respectively contacted with the outer walls on the front side and the rear side of the concave baffle plate, the bottom of the other end of the extending part is also provided with a pointer, and the first guide rod is provided with a length mark.

7. A process according to claim 5, wherein: locking mechanical system include two locking levers, spring and fix the shifting block on the locking lever, the both sides of U type base all seted up with locking lever assorted second guiding hole, two locking levers pass the second guiding hole of both sides respectively and rather than swing joint, the left and right sides of roating seat also all seted up with locking lever assorted lockhole, the shifting block fix on the locking lever in U type base, respectively be provided with a spring between the inner wall of the U type base of two shifting blocks of fixing on two locking levers and both sides, the locking lever stretch into in the lockhole of roating seat under the effect of spring.

8. A process according to claim 5, wherein: the utility model discloses a fan-shaped revolving plate, including a supporting bottom plate, fan-shaped revolving plate, fan-shaped rotating plate, pivot, the top of supporting bottom plate is provided with the semi-circular ring type cover body and rather than being linked into an organic whole, still be provided with semi-circular direction sand grip on the inner wall of the semi-circular ring type cover body, welded fastening mechanism fix at the top of fan-shaped revolving plate, fan-shaped revolving plate curved serve one offer with semi-circular direction sand grip assorted spacing recess, fan-shaped revolving plate pass through spacing recess and semi-circular direction sand grip's cooperation sliding connection on the inner wall of the semi-circular ring type cover body, the other end of fan-shaped revolving plate is fixed in the pivot and along with one of them is with rotating, the center of pivot coincides mutually with the circular of the semi-circular ring type cover body, the lower extreme of pivot passes the supporting bottom plate and is connected rather than rotating, the pivot is passed and is served and still installs the second swing handle.

9. A process according to claim 8, wherein: the welding fixing mechanism comprises a third side plate, a fourth side plate, a second guide seat, a second fixture, a second lead screw and a third rotary handle, wherein the third side plate and the fourth side plate are vertically fixed on the top of the fan-shaped rotating plate relatively, the second lead screw is connected between the third side plate and the fourth side plate in a rotating mode, one end of the second lead screw penetrates through the fourth side plate and one end of the second lead screw penetrating through the fourth side plate is provided with the third rotary handle, the second guide seat is fixed on the top of the third side plate and is flush with the first guide seat, the second fixture is fixed on the top of the second translation seat, and the second translation seat is connected to the second lead screw through a second flexible and is connected to the top of the fan-shaped rotating plate at the lower end of the second translation seat in a sliding mode.

10. A process according to claim 9, wherein: the second clamp comprises an upper clamp head, a lower clamp head, a semi-annular clamping plate, a second guide rod, a third guide rod, a second guide screw rod, a second spring, a transmission plate and a clamping bolt, the upper clamp head and the lower clamp head are detachably connected up and down, the lower clamp head is fixed at the top of a second translation seat, the lower clamp head and the second guide seat are aligned with each other, third connecting seats are arranged on the front side and the rear side of the lower clamp head, a third guide groove for the semi-annular clamping plate to move up and down is formed in the upper clamp head, fourth connecting seats are also arranged on the front side and the rear side of the upper clamp head, the third connecting seats are fixedly connected with the fourth connecting seats through threaded components, the semi-annular clamping plate is movably connected in the third guide groove in the upper clamp head, the second guide rod and the second guide screw rod are vertically fixed at the top of the semi-annular clamping plate, the upper end of the second guide rod and the upper end of the second guide screw rod respectively penetrate through the upper clamp head and are movably connected with the upper clamp head, the top of going up the chuck seted up with clamping bolt assorted screw thread through-hole, clamping bolt's lower extreme passes the screw thread through-hole and stretches into in the third guide way and rotate and connect at the top of semi-annular splint, passes still to be fixed with the driving plate on the second lead screw of last chuck, the vertical top of fixing at last chuck of third guide bar and its upper end pass the driving plate, driving plate and third guide bar swing joint and it and last chuck between still be provided with the second spring.

Technical Field

The invention relates to the technical field of hydraulic pipe fitting machining, in particular to a hydraulic pipe fitting machining process.

Background

The conventional processing steps of the hydraulic pipe fitting comprise pipe cutting, pipe bending, drilling, chamfering, welding and polishing, but the tool needs to be continuously replaced when different processes are carried out, the tool is very troublesome, the cost is increased when more tools are processed, and the tool can only process the pipe with one size and specification, so that the limitation is very large.

Disclosure of Invention

The invention designs a hydraulic pipe fitting machining process, the tool used in the machining process can be used for not only a pipe cutting process but also a welding process, the cost is reduced, the tool can accurately control the pipe cutting length, and the practicability is greatly improved.

In order to solve the technical problem, the invention provides a hydraulic pipe fitting machining process, which is characterized by comprising the following steps of: the method comprises the following steps:

s1: pipe cutting: selecting pipes with corresponding specifications and cutting the pipes into 4 lengths, wherein the four lengths of pipes are a main pipe, a first connecting pipe, a second connecting pipe and a transition pipe in sequence from long to short, and the number of the transition pipes is four;

s2: tapping of the main pipe: the main pipe is fixed, four first holes for connecting the transition pipe and four second holes for connecting the first joints are formed in the surface of the main pipe, and the first joints are fixed at the second holes in a welding mode;

s3: bending: sequentially bending one ends of the four transition pipes through a pipe bending machine;

s4: flaring: flaring is carried out to the both ends of first connecting pipe and second connecting pipe through tip flaring machine to all offer the third opening that is used for connecting the second and connects on the lateral wall of first connecting pipe and second connecting pipe:

s5: welding and fixing for the first time: a transition pipe is welded and fixed at two ends of the first connecting pipe and the second connecting pipe in sequence through a tool, and a second joint is welded and fixed at third openings of the first connecting pipe and the second connecting pipe;

s6: and (3) welding and fixing for the second time: and fixing the main pipe again, fixing four transition pipes connected to two ends of the first connecting pipe and two ends of the second connecting pipe at four first holes of the main pipe by welding, and respectively installing a third joint at two ends of the main pipe.

Further: the thickness of the processing pipe of the first connecting pipe is the same as that of the processing pipe of the second connecting pipe and that of the processing pipe of the transition pipe, and the thickness of the processing pipe of the main pipe is larger than that of the processing pipe of the first connecting pipe.

And further: the bottom welded fastening that the transition pipe was bent is in the first trompil department on being responsible for the outer wall, the other end of transition pipe stretches into in the flaring of first connecting pipe or second connecting pipe head and fixes through the welded mode after carrying out the chamfer, the transition pipe stretch into and still embedded cover is equipped with rubber seal on the outer wall of one end in first connecting pipe or the second connecting pipe flaring head.

And further: and the first connecting pipe, the second connecting pipe and the transition pipe in the step S1 are fixed by the same tool in the step S5 in the pipe cutting process, and then are formed by cutting with a pipe cutting tool.

And further: the frock include U type base, supporting baseplate, roating seat, carousel, cut a tub fixed establishment and welded fastening mechanism, one end of supporting baseplate is connected in one side of U type base upper end and is linked into an organic whole rather than, the bottom of the supporting baseplate other end is provided with the spike and is the level form through the spike and places, the carousel fix the bottom in U type base, the vertical reference column that is fixed with in center department at carousel top, the roating seat rotate to be connected in the top of carousel and its bottom offer the connecting hole that is used for connecting the reference column, install the bearing in the connecting hole and rotate through bearing and reference column and be connected, the both sides wall of roating seat and U type base between still be provided with locking mechanical system, cut tub fixed establishment setting on the roating seat, welded fastening mechanism set up on supporting baseplate, cut tub fixed establishment include first curb plate, The first fixing clamp is fixed at the top of the second side plate and consists of an upper cover body and a lower cover body, semicircular clamping grooves are formed in the lower surface of the upper cover body and the upper surface of the lower cover body, one end of the lower cover body is rotatably connected with one end of the upper cover body through a pin shaft, the other end of the lower cover body is provided with a first connecting seat, the other end of the upper cover body is also provided with two second connecting seats, two screws are fixed on the first connecting seat, a through groove which is communicated up and down is formed in one side of the two second connecting seats relative to the positions of the two screws, the screws are further connected with locking nuts which are matched with the locking nuts to lock and fix the second connecting seats and the first connecting seats, the first guide seat is fixed at the top of the first translation seat and is flush with the lower cover body, the first translation seat is connected onto the first screw through a first flexible connector, the first guide rod penetrates through the first translation seat and is movably connected with the first translation seat, an extending part is further arranged at the bottom of the first guide seat, and a baffle shaped like a Chinese character 'ao' is further installed on the extending part.

And further: the bottom of the first guide seat is fixed with an installation part, one end of the installation part, which is far away from the first translation seat, is provided with a guide groove matched with the extension part, one end of the extension part is movably connected in the guide groove, the side wall of the installation part is also provided with a locking threaded hole communicated with the guide groove, the locking threaded hole is internally connected with a puller bolt, one end of the puller bolt penetrates through the locking threaded hole to extend into the guide groove and contact with the extension part, the concave baffle plate is rotatably connected on the other end of the extension part, the front side and the rear side of the extension part are respectively provided with a fixing screw rod, the fixing screw rods on the two sides respectively penetrate through the concave baffle plate, two locking nuts are respectively connected on the two fixing screw rods penetrating through the concave baffle plate, and the two locking nuts are respectively contacted with the outer walls on the front side and the rear side of the concave baffle plate, the bottom of the other end of the extending part is also provided with a pointer, and the first guide rod is provided with a length mark.

And further: locking mechanical system include two locking levers, spring and fix the shifting block on the locking lever, the both sides of U type base all seted up with locking lever assorted second guiding hole, two locking levers pass the second guiding hole of both sides respectively and rather than swing joint, the left and right sides of roating seat also all seted up with locking lever assorted lockhole, the shifting block fix on the locking lever in U type base, respectively be provided with a spring between the inner wall of the U type base of two shifting blocks of fixing on two locking levers and both sides, the locking lever stretch into in the lockhole of roating seat under the effect of spring.

And further: the utility model discloses a fan-shaped revolving plate, including a supporting bottom plate, fan-shaped revolving plate, fan-shaped rotating plate, pivot, the top of supporting bottom plate is provided with the semi-circular ring type cover body and rather than being linked into an organic whole, still be provided with semi-circular direction sand grip on the inner wall of the semi-circular ring type cover body, welded fastening mechanism fix at the top of fan-shaped revolving plate, fan-shaped revolving plate curved serve one offer with semi-circular direction sand grip assorted spacing recess, fan-shaped revolving plate pass through spacing recess and semi-circular direction sand grip's cooperation sliding connection on the inner wall of the semi-circular ring type cover body, the other end of fan-shaped revolving plate is fixed in the pivot and along with one of them is with rotating, the center of pivot coincides mutually with the circular of the semi-circular ring type cover body, the lower extreme of pivot passes the supporting bottom plate and is connected rather than rotating, the pivot is passed and is served and still installs the second swing handle.

And further: the welding fixing mechanism comprises a third side plate, a fourth side plate, a second guide seat, a second fixture, a second lead screw and a third rotary handle, wherein the third side plate and the fourth side plate are vertically fixed on the top of the fan-shaped rotating plate relatively, the second lead screw is connected between the third side plate and the fourth side plate in a rotating mode, one end of the second lead screw penetrates through the fourth side plate and one end of the second lead screw penetrating through the fourth side plate is provided with the third rotary handle, the second guide seat is fixed on the top of the third side plate and is flush with the first guide seat, the second fixture is fixed on the top of the second translation seat, and the second translation seat is connected to the second lead screw through a second flexible and is connected to the top of the fan-shaped rotating plate at the lower end of the second translation seat in a sliding mode.

And further: the second clamp comprises an upper clamp head, a lower clamp head, a semi-annular clamping plate, a second guide rod, a third guide rod, a second guide screw rod, a second spring, a transmission plate and a clamping bolt, the upper clamp head and the lower clamp head are detachably connected up and down, the lower clamp head is fixed at the top of a second translation seat, the lower clamp head and the second guide seat are aligned with each other, third connecting seats are arranged on the front side and the rear side of the lower clamp head, a third guide groove for the semi-annular clamping plate to move up and down is formed in the upper clamp head, fourth connecting seats are also arranged on the front side and the rear side of the upper clamp head, the third connecting seats are fixedly connected with the fourth connecting seats through threaded components, the semi-annular clamping plate is movably connected in the third guide groove in the upper clamp head, the second guide rod and the second guide screw rod are vertically fixed at the top of the semi-annular clamping plate, the upper end of the second guide rod and the upper end of the second guide screw rod respectively penetrate through the upper clamp head and are movably connected with the upper clamp head, the top of going up the chuck seted up with clamping bolt assorted screw thread through-hole, clamping bolt's lower extreme passes the screw thread through-hole and stretches into in the third guide way and rotate and connect at the top of semi-annular splint, passes still to be fixed with the driving plate on the second lead screw of last chuck, the vertical top of fixing at last chuck of third guide bar and its upper end pass the driving plate, driving plate and third guide bar swing joint and it and last chuck between still be provided with the second spring.

After the structure is adopted, the tool used by the processing technology can be used for not only the pipe cutting process but also the welding process, so that the cost is reduced, and the tool can accurately control the length of the cut pipe, thereby greatly increasing the practical performance; and 180 accurate rotations can be accomplished to the roating seat in this frock to be convenient for carry out welded fastening to the both ends of first connecting pipe and second connecting pipe.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the tool in step S5 of the present invention.

Fig. 2 is a schematic structural view of the second clamp.

FIG. 3 is a connecting structure diagram of a baffle plate shaped like a Chinese character 'ao'.

Fig. 4 is a schematic structural view of the first fixing jig.

FIG. 5 is a process flow diagram.

Fig. 6 is a block diagram of a hydraulic pipe manufactured by the process of the present invention.

Detailed Description

The invention as shown in fig. 5 and 6 provides a hydraulic pipe fitting machining process, which comprises the following steps:

s1: pipe cutting: selecting pipes with corresponding specifications and cutting the pipes into 4 lengths, wherein the four lengths of pipes are a main pipe 28, a first connecting pipe 29, a second connecting pipe 30 and a transition pipe 31 in sequence from long to short, and the number of the transition pipes is four;

s2: tapping of the main pipe: the main pipe is fixed, four first holes for connecting the transition pipe and four second holes for connecting the first joints 32 are formed in the surface of the main pipe, and the first joints 32 are fixed at the second holes in a welding mode;

s3: bending: sequentially bending one ends of the four transition pipes through a pipe bending machine;

s4: flaring: flaring is carried out to the both ends of first connecting pipe and second connecting pipe through the tip flaring machine to all offer the third opening that is used for connecting second joint 33 on the lateral wall of first connecting pipe and second connecting pipe:

s5: welding and fixing for the first time: a transition pipe is welded and fixed at two ends of the first connecting pipe and the second connecting pipe in sequence through a tool, and a second joint is welded and fixed at third openings of the first connecting pipe and the second connecting pipe;

s6: and (3) welding and fixing for the second time: the main tube is fixed again, four transition tubes connected to the two ends of the first connecting tube and the two ends of the second connecting tube are fixed at the four first openings of the main tube by welding, and a third joint 34 is respectively installed at the two ends of the main tube.

The thickness of the processing pipe material of the first connecting pipe is the same as that of the processing pipe material of the second connecting pipe and that of the processing pipe material of the transition pipe, and the thickness of the processing pipe material of the main pipe is larger than that of the processing pipe material of the first connecting pipe.

The bottom welded fastening that above-mentioned transition pipe was bent is in the first trompil department on being responsible for the outer wall, the other end of transition pipe stretches into in the flaring of first connecting pipe or second connecting pipe head and fixes through the welded mode after carrying out the chamfer, the transition pipe stretch into and still embedded cover is equipped with rubber seal on the outer wall of one end in first connecting pipe or the second connecting pipe flaring head.

The first connecting pipe, the second connecting pipe and the transition pipe in the step S1 are all fixed by the same tool in the step S5 during the pipe cutting process, and then are formed by cutting with the pipe cutting tool.

The tool shown in fig. 1, 3 and 4 comprises a U-shaped base 1, a supporting bottom plate 38, a rotating seat 3, a turntable 2, a pipe cutting fixing mechanism and a welding fixing mechanism, wherein one end of the supporting bottom plate is connected to one side of the upper end of the U-shaped base and is connected with the supporting bottom plate into a whole, the bottom of the other end of the supporting bottom plate is provided with a supporting leg 22 and is horizontally placed through the supporting leg, the turntable is fixed at the bottom in the U-shaped base, a positioning column is vertically fixed at the center of the top of the turntable, the rotating seat is rotatably connected above the turntable, a connecting hole for connecting the positioning column is formed in the bottom of the rotating seat, a bearing is arranged in the connecting hole and is rotatably connected with the positioning column through the bearing, a locking mechanism is further arranged between two side walls of the rotating seat and the U-shaped base, the pipe cutting fixing mechanism is arranged on the rotating seat, the welding fixing mechanism is arranged on the supporting bottom plate, the pipe cutting fixing mechanism comprises a first side plate 8, a second side plate 7, a first fixing clamp 10, a first guide seat 11, a first guide rod 6, a first lead screw 5 and a first rotary handle 4, wherein the first side plate and the second side plate are vertically arranged at the top of the rotary seat relatively, the first guide rod is horizontally fixed between the first side plate and the second side plate, the first lead screw is positioned below the first guide rod and is horizontally and rotatably connected between the first side plate and the second side plate, one end of the first lead screw penetrates through the second side plate and is provided with the first rotary handle on one end penetrating through the second side plate, the first fixing clamp is fixed at the top of the second side plate and consists of an upper cover body 10-1 and a lower cover body 10-2, the lower surface of the upper cover body and the upper surface of the lower cover body are both provided with semicircular clamping grooves, one end of the lower cover body is rotatably connected with one end of the upper cover body through a pin shaft, the other end of the lower cover body is provided with a first connecting seat 10-3, the other end of the upper cover body is also provided with two second connecting seats 10-4, the first connecting seat is fixedly provided with two screw rods, one side of each of the two second connecting seats is provided with a through groove which is vertically communicated relative to the positions of the two screw rods, the screw rods are further connected with locking nuts which are matched with the locking nuts to lock and fix the second connecting seats and the first connecting seats, the first guide seat is fixed at the top of the first translation seat 11 and is flush with the lower cover body, the first translation seat is connected to the first screw rods through first flexibility, the first guide rods penetrate through the first translation seat and are movably connected with the first translation seat, the bottom of the first guide seat is further provided with an extending part 25, and the extending part is further provided with a concave baffle 26.

As shown in fig. 3, a mounting portion 23 is fixed at the bottom of the first guide seat, a guide groove matched with the extension portion is formed in one end of the mounting portion, which is far away from the first translation seat, a locking threaded hole communicated with the guide groove is further formed in the side wall of the mounting portion, a tightening bolt 24 is connected in the locking threaded hole, one end of the tightening bolt penetrates through the locking threaded hole and extends into the guide groove and contacts with the extension portion, the concave baffle plate is rotatably connected to the other end of the extension portion, two fixing screws are respectively arranged on the front side and the rear side of the extension portion, the fixing screws on the two sides respectively penetrate through the concave baffle plate, two locking nuts are respectively connected to the two fixing screws penetrating through the concave baffle plate, and the two locking nuts are respectively contacted with the outer walls on the front side and the rear side of the concave baffle plate, the bottom of the other end of the extending part is also provided with a pointer 27, and the first guide rod is provided with a length mark.

As shown in fig. 1, the locking mechanism includes two lock rods 35, a spring 37 and a shifting block 36 fixed on the lock rods, the two sides of the U-shaped base are all provided with second guide holes matched with the lock rods, the two lock rods respectively pass through the second guide holes on the two sides and are movably connected with the second guide holes, the left side and the right side of the rotating base are also provided with lock holes matched with the lock rods, the shifting block is fixed on the lock rods in the U-shaped base, a spring is respectively arranged between the inner walls of the U-shaped base fixed on the two lock rods and the two shifting blocks on the two lock rods, and the lock rods extend into the lock holes of the rotating base under the action of the springs.

As shown in fig. 1, the top of the supporting base plate is provided with a semi-circular ring-shaped cover body 12 and is connected with the same, the inner wall of the semi-circular ring-shaped cover body is further provided with a semicircular guide convex strip 39, the welding fixing mechanism is fixed at the top of the fan-shaped rotating plate 18, one end of the arc-shaped rotating plate is provided with a limit groove matched with the semicircular guide convex strip, the fan-shaped rotating plate is connected with the inner wall of the semi-circular ring-shaped cover body in a sliding manner through the match of the limit groove and the semicircular guide convex strip, the other end of the fan-shaped rotating plate is fixed on a rotating shaft and rotates along with the rotating shaft, the center of the rotating shaft coincides with the circle of the semi-circular ring-shaped cover body, the lower end of the rotating shaft penetrates through the supporting base plate and is connected with the rotating shaft, and the rotating shaft penetrates through one end of the supporting base plate and is further provided with a second rotating handle 21.

The welding fixing mechanism shown in fig. 1 includes a third side plate 13, a fourth side plate 15, a second guide seat 19, a second clamp 20, a second lead screw 16 and a third rotary handle 17, the third side plate and the fourth side plate are vertically fixed on the top of the sector-shaped rotating plate, the second lead screw is rotatably connected between the third side plate and the fourth side plate, one end of the second lead screw passes through the fourth side plate and is provided with the third rotary handle on the end thereof passing through the fourth side plate, the second guide seat is fixed on the top of the third side plate and is flush with the first guide seat, the second clamp is fixed on the top of a second translation seat 14, the second translation seat is connected on the second lead screw through a second flexible joint and is slidably connected on the top of the sector-shaped rotating plate at the lower end thereof.

The second clamp shown in fig. 2 comprises an upper clamp 20-1, a lower clamp 20-2, a semi-annular clamping plate, a second guide rod 20-5, a third guide rod 20-7, a second guide screw 20-6, a second spring, a transmission plate 20-8 and a clamping bolt 20-3, wherein the upper clamp and the lower clamp are detachably connected from top to bottom, the lower clamp is fixed on the top of a second translation seat, the lower clamp is flush with the second guide seat, the front side and the rear side of the lower clamp are provided with third connecting seats 20-4, a third guide groove for the semi-annular clamping plate to move up and down is formed in the upper clamp, the front side and the rear side of the upper clamp are also provided with fourth connecting seats 20-3, the third connecting seats are fixedly connected with the fourth connecting seats through threaded components, the semi-annular clamping plate is movably connected in the third guide groove in the upper clamp, the utility model discloses a semi-annular splint, including first guide bar, first guide screw, second guide screw, drive plate, transmission plate, second guide bar and second guide screw all vertically fix the top at semi-annular splint, the upper end of second guide bar and second guide screw pass the chuck respectively and rather than swing joint, the top of going up the chuck seted up with clamping bolt assorted screw through-hole, clamping bolt's lower extreme passes the screw through-hole and stretches into in the third guide way and rotate the top of connecting at semi-annular splint, pass and still be fixed with the drive plate on the second guide screw of chuck, the vertical top of fixing at last chuck of third guide bar and its upper end pass the drive plate, drive plate and third guide bar swing joint and it and last chuck between still be provided with the second spring.

When the pipe is cut, the pipe is fixed on the first fixing clamp, one end of the pipe is in contact with the concave baffle, and the length of the cut pipe is controlled by controlling the position of the first translation seat.

During welding, the first connecting pipe or the second connecting pipe is fixed in a first fixing clamp, then the bent transition pipe is fixed in a second clamp, and one end of the transition pipe extends into the end part of the flaring of the first connecting pipe or the second connecting pipe by rotating the first rotary handle or the third rotary handle, so that welding and fixing are carried out; and the invention can weld and fix transition pipes with different shapes by rotating the second rotary handle.

In conclusion, the tool used in the processing technology can be used for not only the pipe cutting process but also the welding process, so that the cost is reduced, and the length of the cut pipe can be accurately controlled, so that the practical performance is greatly improved; and 180 accurate rotations can be accomplished to the roating seat in this frock to be convenient for carry out welded fastening to the both ends of first connecting pipe and second connecting pipe.