A welding fixture for reducing elbows of stainless steel pipe fittings

Abstract

The present invention discloses a welding fixture for stainless steel pipe reducing elbows, which specifically relates to the field of metal processing technology, and includes a base, wherein a first slide groove is provided on the upper surface of the base, and the inner wall of the first slide groove is slidably connected to the outer surfaces of two first sliding blocks. The welding fixture for stainless steel pipe reducing elbows, by providing a first fixed plate, a clamping ring, a screw rod, a fourth limiting groove and a second fixed plate, facilitates the stable clamping and locking of the welding fixture for different pipe diameters, and also adjusts the position of the welding fixture, avoiding the welding fixture causing the welded pipe to be offset during the welding process, thereby effectively improving the stability of the welding fixture, and at the same time facilitating the alignment of the pipes to be welded, reducing the possibility of errors in the pipes, and greatly reducing the frequency of defective products, thereby improving the accuracy of the welding fixture for reducing elbows.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and more particularly to a welding fixture for reducing elbows of stainless steel pipe fittings. Background Art

[0002] Stainless steel pipe is a hollow long round steel, an economical cross-section steel, and an important product in the steel industry. It can be widely used in life decoration and industry. Many people on the market use it to make stair handrails, window guards, railings, furniture, etc. Commonly used are 201 and 304, accounting for about 8% to 16% of the total steel. It is widely used in the national economy and is widely used in industrial pipelines such as petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural components. Because the steel pipe has a hollow section, it is most suitable for liquid, gas and solid pipelines. At the same time, compared with round steel of the same weight, the steel pipe has a large section coefficient and high bending and torsional strength, so it has also become an important material for various mechanical and building structures. With the development of new technologies such as atomic energy, rockets, missiles and aerospace industries, stainless steel pipes are becoming more and more important in national defense industry, science and technology and economic construction, and their application prospects are very broad. The existing reducing elbow welding fixture is difficult to stably clamp and lock reducing elbows of different diameters, which makes the reducing elbows easy to deviate during welding, causing deviations during welding, affecting the accuracy of reducing elbow welding, and poor applicability. At the same time, it is difficult to align the pipes to be welded before welding, resulting in errors in the pipes after welding, which greatly increases the frequency of defective products and low welding efficiency. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding fixture for reducing elbows of stainless steel pipe fittings. The technical problem to be solved by the present invention is that the existing reducing elbow welding fixture is difficult to stably clamp and lock reducing elbows of different pipe diameters, which causes the reducing elbows to easily shift during welding, resulting in deviations during welding, affecting the accuracy of reducing elbow welding, and having poor applicability. At the same time, it is difficult to align the pipe fittings to be welded before welding, resulting in errors in the pipe fittings after welding, thereby greatly increasing the frequency of defective products and low welding efficiency.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a welding fixture for stainless steel pipe reducing elbows, comprising a base, a first slide groove is provided on the upper surface of the base, the inner wall of the first slide groove is slidably connected to the outer surfaces of two first sliders, the inner walls of the two first sliders are threadedly connected to the outer surface of the same first bidirectional screw rod, the left end of the first bidirectional screw rod and the right end of the first motor are mutually clamped, the upper surface of the first slider is fixedly connected to the bottom end of the first electric push rod, the top end of the first electric push rod is fixedly connected to the lower surface of the second slide rail, the inner wall of the second slide rail is slidably connected to the outer surface of the second slider, the upper surface of the second slide rail located on the left side is connected to the outer surface of the second motor through the second slide rail, the right end of the second motor and the outer surface of the mold are mutually clamped, and the upper surface of the second slide rail located on the right side is connected to the lower surface of the first fixed plate through the second slide rail.

[0005] The upper surface of the first fixing plate is hinged to the outer surface of the pin shaft, and the left side surface of the first fixing plate is hinged to the right side surface of the second fixing plate through the pin shaft. The left side surface of the second fixing plate is provided with a second sliding groove, and the front side and the back side of the inner wall of the second sliding groove are respectively connected to one end of the front side and one end of the back side of the second bidirectional screw rod, the outer surface of the second bidirectional screw rod is threadedly connected to the inner walls of the two clamping rings, one end of the front side of the second bidirectional screw rod is fixedly connected to the back side of the second turntable, the right side surface of the second fixing plate is fixedly connected to the left sides of the two telescopic rods, and the right sides of the two telescopic rods are respectively fixedly connected to the left sides of the two limit strips, and the upper surface of the first fixing plate is provided with two fourth limiting grooves, and the outer surfaces of the two limiting strips are respectively clamped with the inner walls of the two fourth limiting grooves.

[0006] As a further solution of the present invention: three incisions are provided on the outer surface of the mold, and three mounting grooves are provided on the outer surfaces of the three incisions. A threaded groove is provided on the inner wall of the mounting groove, and the inner wall of the mounting groove is clamped with the outer surface of the plunger. A threaded ring is provided on the outer surface of the plunger, and the outer surface of the plunger is threadedly connected to the inner wall of the threaded groove through the threaded ring. A movable groove is provided on the inner wall of the plunger, and the inner wall of the plunger is slidingly connected to the outer surface of the ball head through the movable groove. The outer surface of the ball head and the top of the spring overlap each other, and the bottom end of the spring is fixedly connected to the lower surface of the inner wall of the plunger, and the lower surface of the inner wall of the mounting groove is fixedly connected to the lower surface of the second limit block. A third limit groove is provided at the bottom end of the plunger, and the inner wall of the third limit groove is clamped with the outer surface of the second limit block. The inner wall of the mold is threadedly connected to the outer surface of the plunger through the mounting groove.

[0007] As a further solution of the present invention: a first limit groove is opened at the left end of the first bidirectional screw rod, the inner wall of the first limit groove and the outer surface of the first limit block are clamped with each other, the left side surface of the first limit block is fixedly connected to the right end of the first motor, and the left side surface of the first bidirectional screw rod is transmission connected to the right end of the first motor through the first limit groove.

[0008] As a further solution of the present invention: the outer surface of the first electric push rod is fixedly connected to the outer surface of the first slide rail, the opposite surfaces of the two first slide rails are respectively slidably connected to the sides of the two waste dishes away from each other, a second limiting groove is provided on the right side surface of the waste dish on the left, the left side surface of the waste dish on the right is fixedly connected to the right side surface of the limiting plate, and the opposite surfaces of the two waste dishes are slidably connected through the second limiting groove.

[0009] As a further solution of the present invention: the inner wall of the second slide rail is slidably connected to the outer surface of the second slider, the inner wall of the second slider is threadedly connected to the outer surface of the screw rod, and the screw rod is fixedly connected to the first turntable.

[0010] As a further solution of the present invention: the inner wall of the base is slidably connected to the outer surface of the storage box, two third sliding blocks are provided on the left and right sides of the base, and two third sliding grooves are respectively provided on the left and right sides of the inner wall of the storage box, and the upper surface of the inner wall of the storage box is fixedly connected to the bottom ends of four second electric push rods, and the top ends of the four second electric push rods overlap with the upper surface of the same base.

[0011] As a further solution of the present invention: the inner wall of the storage box is fixedly connected to the outer surface of the baffle, the back side of the inner wall of the storage box is connected to one end of the back side of the nozzle, and a drainage groove is provided on the lower surface of the storage box.

[0012] As a further solution of the present invention: the inner wall of the storage box is slidably connected to the outer surface of the top cover, the four corners of the lower surface of the storage box are respectively fixedly connected to the top ends of four support rods, and the bottom ends of the support rods are fixedly connected to the upper surface of the suction cup.

[0013] 1. The present invention provides a first fixed plate, a clamping ring, a screw rod, a fourth limiting groove and a second fixed plate. The operator pulls the second fixed plate through the pin shaft, and then rotates the second turntable to move the two clamping rings toward the middle, thereby clamping the material. After the position of the second fixed plate is fixed, the operator pulls out the limiting strip through the telescopic rod, and finally inserts the limiting strip into the fourth limiting groove above the first fixed plate. When it is necessary to fine-tune the position of the mold and the second fixed plate, the operator drives the screw rod to rotate by rotating the first turntable. While the screw rod rotates, the two second sliders slide inside the second slide rail, thereby moving the mold and the second fixed plate to the left or right, which facilitates the stable clamping and locking of the welding fixture for different pipe diameters, and also adjusts the position of the welding fixture, avoiding the deviation of the welded pipe fittings caused by the welding fixture during the welding process, thereby effectively improving the stability of the welding fixture, and at the same time facilitating the alignment of the pipe fittings to be welded, reducing the possibility of errors in the pipe fittings, and greatly reducing the frequency of defective products, thereby improving the accuracy of the welding fixture for different diameter elbows;

[0014] 2. The present invention sets a mold, a spring, a plunger and a ball head. The operator inserts the pipe fitting along the incision on the right side of the mold. When the inside of the pipe fitting contacts the incision above the mold, the ball head inside the plunger will first contact the internal ball head of the pipe fitting, thereby squeezing the ball head into the movable groove inside the plunger. At the same time, the ball head will apply pressure to the spring after entering the inside of the plunger, and the spring applies a reaction force to the ball head, thereby pushing the ball head outward again, and finally clamping the pipe fitting and the mold, which is convenient for the welding fixture to perform top welding when welding the different-diameter elbow, and also prevents the spot welding from falling off due to excessive top force during welding of the welding fixture, thereby effectively improving the working efficiency of the welding fixture, more effectively fixing the plunger, and improving the stability of the plunger while also improving the fixing effect of the welding fixture on the pipe fitting;

[0015] 3. The present invention provides a storage box, a second electric push rod, a baffle and a nozzle. When the welding fixture needs to be cleaned, the operator pulls out the first motor from the left side of the first bidirectional screw, then starts the second electric push rod to slowly move downward, and then cleans the inside of the welding fixture through the nozzle, and the waste water flows out through the drainage trough, which facilitates the cleaning of the welding fixture and avoids the residue generated during the working process from entering the inside of the parts and also avoids the residue from damaging the parts inside the welding fixture. At the same time, it prevents the residue from entering the inside of the parts and causing the welding fixture to jam, thereby improving the working efficiency of the welding fixture while ensuring the service life of the welding fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the storage box of the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the base of the present invention;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the clamp ring of the present invention;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the second fixing plate of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the mold explosion of the present invention;

[0022] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the plunger of the present invention;

[0023] In the figure: 1 base, 2 first slide groove, 3 first slider, 4 first bidirectional screw rod, 5 first limit groove, 6 first limit block, 7 first motor, 8 first electric push rod, 9 first slide rail, 10 waste dish, 11 second limit groove, 12 limit plate, 13 second slide rail, 14 first turntable, 15 screw rod, 16 second slider, 17 second motor, 18 mold, 19 cutout, 20 mounting groove, 21 thread groove, 22 second limit block, 23 plunger, 24 thread ring , 25 movable groove, 26 ball head, 27 spring, 28 third limiting groove, 29 first fixed plate, 30 pin shaft, 31 fourth limiting groove, 32 second fixed plate, 33 second slide groove, 34 second two-way screw rod, 35 clamp ring, 36 second turntable, 37 telescopic rod, 38 limiting strip, 39 storage box, 40 third slide groove, 41 third slider, 42 baffle, 43 second electric push rod, 44 nozzle, 45 drainage groove, 46 top cover, 47 support rod, 48 suction cup. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-7As shown, the present invention provides a welding fixture for a stainless steel pipe reducing elbow, comprising a base 1, a first slide groove 2 is provided on the upper surface of the base 1, the inner wall of the first slide groove 2 is slidably connected to the outer surfaces of two first sliders 3, the inner walls of the two first sliders 3 are threadedly connected to the outer surface of the same first bidirectional screw rod 4, the left end of the first bidirectional screw rod 4 is clamped with the right end of the first motor 7, the upper surface of the first slider 3 is fixedly connected to the bottom end of the first electric push rod 8, the top end of the first electric push rod 8 is fixedly connected to the lower surface of the second slide rail 13, the inner wall of the second slide rail 13 is slidably connected to the outer surface of the second slide rail 16, the upper surface of the second slide rail 13 located on the left side is connected to the outer surface of the second motor 17 through the second slide rail 16, the right end of the second motor 17 is clamped with the outer surface of the mold 18, the upper surface of the second slide rail 13 located on the right side is connected to the lower surface of the first fixed plate 29 through the second slide plate 16, and the upper surface of the first fixed plate 29 and the outer surface of the pin shaft 30 are hinged to each other.

[0026] The left side of the first fixing plate 29 is hinged to the right side of the second fixing plate 32 through a pin shaft 30. A second sliding groove 33 is provided on the left side of the second fixing plate 32. The front side and the back side of the inner wall of the second sliding groove 33 are respectively connected to one end of the front side and one end of the back side of the second bidirectional screw rod 34. The outer surface of the second bidirectional screw rod 34 is threadedly connected to the inner walls of the two clamping rings 35. One end of the front side of the second bidirectional screw rod 34 is fixedly connected to the back side of the second rotating disk 36. The right side of the second fixing plate 32 is fixedly connected to the left side of the two telescopic rods 37. The right sides of the two telescopic rods 37 are respectively fixedly connected to the left sides of the two limit bars 38. Then, two fourth limiting grooves 31 are formed on the upper surface of the first fixed plate 29, and the outer surfaces of the two limiting strips 38 are respectively engaged with the inner walls of the two fourth limiting grooves 31, which facilitates the stable clamping and locking of the welding fixture for different pipe diameters, and also adjusts the position of the welding fixture, avoiding the deviation of the welded pipe fittings during the welding process, thereby effectively improving the stability of the welding fixture, facilitating the alignment of the pipe fittings to be welded, reducing the possibility of errors in the pipe fittings, and greatly reducing the frequency of defective products, thereby improving the accuracy of the welding fixture for welding different diameter elbows.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the outer surface of the mold 18 is provided with three cutouts 19, and the outer surfaces of the three cutouts 19 are provided with three mounting grooves 20. The inner wall of the mounting groove 20 is provided with a threaded groove 21. The inner wall of the mounting groove 20 and the outer surface of the plunger 23 are mutually clamped. The outer surface of the plunger 23 is sleeved with a threaded ring 24. The outer surface of the plunger 23 is threadedly connected with the inner wall of the threaded groove 21 through the threaded ring 24. The inner wall of the plunger 23 is provided with a movable groove 25. The inner wall of the plunger 23 is slidably connected with the outer surface of the ball head 26 through the movable groove 25. The outer surface of the ball head 26 overlaps with the top of the spring 27. The spring 27 is The bottom end is fixedly connected to the lower surface of the inner wall of the plunger 23, the lower surface of the inner wall of the mounting groove 20 is fixedly connected to the lower surface of the second limit block 22, and a third limit groove 28 is provided at the bottom end of the plunger 23. The inner wall of the third limit groove 28 and the outer surface of the second limit block 22 are mutually engaged, and the inner wall of the mold 18 is threadedly connected to the outer surface of the plunger 23 through the mounting groove 20. By setting the mold 18, it is convenient for the welding fixture to perform top welding when welding the reducing elbow, and it also prevents the spot welding from falling off due to excessive top force during welding, thereby effectively improving the working efficiency of the welding fixture. The plunger 23 is fixed more effectively, the stability of the plunger 23 is improved, and the fixing effect of the welding fixture on the pipe fitting is also improved. A first limiting groove 5 is opened at the left end of the first bidirectional screw rod 4, and the inner wall of the first limiting groove 5 and the outer surface of the first limiting block 6 are mutually clamped. The left side of the first limiting block 6 is fixedly connected to the right end of the first motor 7. The left side of the first bidirectional screw rod 4 is transmission-connected with the right end of the first motor 7 through the first limiting groove 5. By setting the first limiting block 6, it is convenient to drive the first bidirectional screw rod 4, and it is also avoided that the first bidirectional screw rod 4 is cleaned when the welding fixture is cleaned. A motor 7 is damaged, the outer surface of the first electric push rod 8 is fixedly connected to the outer surface of the first slide rail 9, the opposite surfaces of the two first slide rails 9 are respectively slidably connected to the sides away from the two waste dishes 10, and the right side surface of the waste dish 10 on the left is provided with a second limiting groove 11, the left side surface of the waste dish 10 on the right is fixedly connected to the right side surface of the limiting plate 12, and the opposite surfaces of the two waste dishes 10 are slidably connected through the second limiting groove 11. By setting the waste dish 10, it is convenient to collect the residue generated during the operation of the welding fixture, thereby avoiding the residue from damaging the internal parts of the welding fixture.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the inner wall of the second slide rail 13 is slidably connected to the outer surface of the second slider 16, and the inner wall of the second slider 16 is threadedly connected to the outer surface of the screw rod 15, and the screw rod 15 is fixedly connected to the first turntable 14. By setting the second slide rail 13, it is convenient to stably clamp the welding fixture while also fine-tuning the position of the welding fixture, thereby effectively improving the flexibility of the welding fixture. The inner wall of the base 1 is slidably connected to the outer surface of the storage box 39, and two third sliders 41 are provided on the left and right sides of the base 1. Two third slide grooves 40 are respectively provided on the left and right sides of the inner wall of the storage box 39. The upper surface of the inner wall of the storage box 39 is fixedly connected to the bottom ends of four second electric push rods 43, and the top ends of the four second electric push rods 43 overlap with the upper surface of the same base 1. By setting the second electric push rod 43, it is convenient to adjust the position of the base 1, thereby improving the efficiency of recycling the base 1, and making it more convenient to clean the welding fixture.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the inner wall of the storage box 39 is fixedly connected to the outer surface of the baffle 42, the back side of the inner wall of the storage box 39 is connected to one end of the back side of the nozzle 44, and a drainage groove 45 is provided on the lower surface of the storage box 39. By setting the nozzle 44, it is convenient to clean the welding fixture and prevent residue from entering the interior of the parts to cause the welding fixture to get stuck, thereby improving the working efficiency of the welding fixture. The inner wall of the storage box 39 is slidably connected to the outer surface of the top cover 46, and the four corners of the lower surface of the storage box 39 are respectively fixedly connected to the top ends of four support rods 47, and the bottom ends of the support rods 47 are fixedly connected to the upper surface of the suction cup 48. By setting the suction cup 48, it is convenient to fix the welding fixture, thereby effectively improving the stability of the welding fixture.

[0030] Working principle of the present invention: before use, the operator installs the spring 27 along the movable groove 25 inside the plunger 23, and then installs the ball head 26 above the spring 27, so that the spring 27 contacts the top of the inside of the plunger 23 through the ball head 26, and then the operator inserts the plunger 23 into the mold 18 through the installation groove 20, and twists the plunger 23 at the same time, so that the threaded ring 24 above the plunger 23 is connected with the threaded groove 21 on the inner wall of the installation groove 20, and finally the plunger 23 is completely inserted into the installation groove 20. When the plunger 23 is completely inserted into the installation groove 20, the third limiting groove 28 below the plunger 23 will be stuck with the second limiting block 22 inside the installation groove 20, so as to fix the plunger 23, and then the operator inserts the pipe along the mold 18. The notch 19 on the right side of the mold 18 is inserted. When the inside of the pipe fitting contacts the notch 19 above the mold 18, the ball head 26 inside the plunger 23 will first contact the internal ball head 26 of the pipe fitting, thereby squeezing the ball head 26 into the movable groove 25 inside the plunger 23. At the same time, the ball head 26 will apply pressure to the spring 27 after entering the inside of the plunger 23, and the spring 27 applies a reaction force to the ball head 26, thereby pushing the ball head 26 outward again, and finally clamping the pipe fitting and the mold 18. When the pipe fitting is installed, the operator starts the first motor 7 to drive the first bidirectional screw 4 to rotate, and the first bidirectional screw 4 rotates while driving the two first sliders 3 to slide in the first slide groove 2 inside the base 1, so that the two first sliders 3 above the two first sliders 3 The electric push rod 8 moves toward the middle, and the two waste trays 10 inside the first slide rail 9 move to the middle end at the same time. The limiting plate 12 on the left side of the right waste tray 10 enters the second limiting groove 11 on the right side of the left waste tray 10, and finally the two waste trays 10 are merged. At the same time, the operator pulls the second fixed plate 32 through the pin 30, and then rotates the second turntable 36 to move the two clamping rings 35 toward the middle, thereby clamping the material. After the position of the second fixed plate 32 is fixed, the operator pulls out the limiting strip 38 through the telescopic rod 37, and finally inserts the limiting strip 38 into the fourth limiting groove 31 above the first fixed plate 29. When it is necessary to fine-tune the position of the mold 18 and the second fixed plate 32, the operator rotates the first turntable 14 The screw rod 15 is driven to rotate, and while the screw rod 15 rotates, the two second sliders 16 slide inside the second slide rail 13, so that the mold 18 and the second fixed plate 32 move left or right, and then the operator starts the second motor 17 to drive the mold 18 to rotate, so that the mold 18 drives the pipe fitting to rotate 360 ​​degrees, so as to perform ring welding on the position to be welded. When the welding fixture needs to be cleaned, the operator pulls out the first motor 7 from the left side of the first bidirectional screw rod 4, and then starts the second electric push rod 43 to slowly move downward. After the base 1 loses the support of the second electric push rod 43, the third sliders 41 on both sides slide inside the third slide groove 40 inside the storage box 39 until they fall above the baffle 42 deep in the storage box 39.Finally, the operator inserts the top cover 46 into the right side of the storage box 39 to seal the storage box 39, and then cleans the inside of the welding fixture through the nozzle 44, and the waste water flows out through the drainage groove 45.

[0031] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0032] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0033] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding fixture for a stainless steel pipe reducing elbow, comprising a base, characterized in that: The upper surface of the base (1) is provided with a first slide groove (2), the inner wall of the first slide groove (2) is slidably connected to the outer surfaces of the two first sliders (3), the inner walls of the two first sliders (3) are threadedly connected to the outer surface of the same first bidirectional screw rod (4), the left end of the first bidirectional screw rod (4) is mutually clamped with the right end of the first motor (7), the upper surface of the first slider (3) is fixedly connected to the bottom end of the first electric push rod (8), the top end of the first electric push rod (8) is fixedly connected to the lower surface of the second slide rail (13), the inner wall of the second slide rail (13) is slidably connected to the outer surface of the second slider (16), the upper surface of the second slide rail (13) located on the left side is connected to the outer surface of the second motor (17) through the second slider (16), the right end of the second motor (17) is mutually clamped with the outer surface of the mold (18), and the upper surface of the second slide rail (13) located on the right side is connected to the lower surface of the first fixed plate (29) through the second slider (16); The upper surface of the first fixing plate (29) is hinged to the outer surface of the pin shaft (30), the left side surface of the first fixing plate (29) is hinged to the right side surface of the second fixing plate (32) through the pin shaft (30), the left side surface of the second fixing plate (32) is provided with a second slide groove (33), the front side and the back side of the inner wall of the second slide groove (33) are respectively connected to one end of the front side and one end of the back side of the second bidirectional screw rod (34), the outer surface of the second bidirectional screw rod (34) is connected to the two clamping rings (35) The inner wall is threadedly connected, one end of the front side of the second bidirectional screw rod (34) is fixedly connected to the back side of the second turntable (36), the right side of the second fixed plate (32) is fixedly connected to the left side of the two telescopic rods (37), the right side of the two telescopic rods (37) are respectively fixedly connected to the left side of the two limit strips (38), and the upper surface of the first fixed plate (29) is provided with two fourth limit grooves (31), and the outer surfaces of the two limit strips (38) are respectively engaged with the inner walls of the two fourth limit grooves (31).

2. A welding fixture for reducing elbows of stainless steel pipe fittings according to claim 1, characterized in that: The outer surface of the mold (18) is provided with three cutouts (19), and the outer surfaces of the three cutouts (19) are each provided with three mounting grooves (20). The inner wall of the mounting groove (20) is provided with a threaded groove (21), and the inner wall of the mounting groove (20) and the outer surface of the plunger (23) are mutually clamped. The outer surface of the plunger (23) is sleeved with a threaded ring (24), and the outer surface of the plunger (23) is threadedly connected to the inner wall of the threaded groove (21) through the threaded ring (24). The inner wall of the plunger (23) is provided with a movable groove (25), and the inner wall of the plunger (23) is connected to the inner wall of the threaded groove (21) through the movable groove (25). 5) is slidably connected to the outer surface of the ball head (26), the outer surface of the ball head (26) overlaps with the top of the spring (27), the bottom end of the spring (27) is fixedly connected to the lower surface of the inner wall of the plunger (23), the lower surface of the inner wall of the mounting groove (20) is fixedly connected to the lower surface of the second limit block (22), the bottom end of the plunger (23) is provided with a third limit groove (28), the inner wall of the third limit groove (28) is mutually clamped with the outer surface of the second limit block (22), and the inner wall of the mold (18) is threadedly connected to the outer surface of the plunger (23) through the mounting groove (20).

3. A welding fixture for reducing elbows of stainless steel pipes according to claim 1, characterized in that: A first limiting groove (5) is provided at the left end of the first bidirectional screw rod (4); the inner wall of the first limiting groove (5) and the outer surface of the first limiting block (6) are mutually engaged; the left side surface of the first limiting block (6) is fixedly connected to the right end of the first motor (7); and the left side surface of the first bidirectional screw rod (4) is transmission-connected to the right end of the first motor (7) via the first limiting groove (5).

4. A welding fixture for reducing elbows of stainless steel pipes according to claim 1, characterized in that: The outer surface of the first electric push rod (8) is fixedly connected to the outer surface of the first slide rail (9), the opposite surfaces of the two first slide rails (9) are respectively slidably connected to the sides of the two waste dishes (10) that are away from each other, a second limiting groove (11) is provided on the right side surface of the waste dish (10) on the left, the left side surface of the waste dish (10) on the right is fixedly connected to the right side surface of the limiting plate (12), and the opposite surfaces of the two waste dishes (10) are slidably connected via the second limiting groove (11).

5. The welding fixture for reducing elbows of stainless steel pipes according to claim 1 is characterized in that: The inner wall of the second slide rail (13) is slidably connected to the outer surface of the second slider (16), the inner wall of the second slider (16) is threadedly connected to the outer surface of the screw rod (15), and the screw rod (15) is fixedly connected to the first turntable (14).

6. A welding fixture for reducing elbows of stainless steel pipe fittings according to claim 1, characterized in that: The inner wall of the base (1) is slidably connected to the outer surface of the storage box (39); two third sliding blocks (41) are provided on the left and right side surfaces of the base (1); two third sliding grooves (40) are respectively provided on the left and right side surfaces of the inner wall of the storage box (39); the upper surface of the inner wall of the storage box (39) is fixedly connected to the bottom ends of four second electric push rods (43); and the top ends of the four second electric push rods (43) overlap with the upper surface of the same base (1).

7. A welding fixture for reducing elbows of stainless steel pipes according to claim 6, characterized in that: The inner wall of the storage box (39) is fixedly connected to the outer surface of the baffle (42), the back side of the inner wall of the storage box (39) is connected to one end of the back side of the nozzle (44), and a drainage groove (45) is provided on the lower surface of the storage box (39).

8. A welding fixture for reducing elbows of stainless steel pipes according to claim 7, characterized in that: The inner wall of the storage box (39) is slidably connected to the outer surface of the top cover (46), the four corners of the lower surface of the storage box (39) are respectively fixedly connected to the top ends of four support rods (47), and the bottom ends of the support rods (47) are fixedly connected to the upper surface of the suction cup (48).

Images