CN118616542A - A portable stainless steel pipe bending machine - Google Patents

Abstract

The invention discloses a portable stainless steel pipe bending machine, which comprises a frame; the front side of the frame is provided with a bending mechanism, the bending mechanism comprises a fixed wheel die arranged on the front side of the frame, and the periphery of the fixed wheel die is provided with a movable wheel die which rotates around the fixed wheel die and is matched with the fixed wheel die; one end of the front side of the frame is provided with a clamping mechanism corresponding to the bending mechanism, two ends of the frame are provided with positioning mechanisms corresponding to the bending mechanism, and the clamping mechanism is positioned between one of the positioning mechanisms and the bending mechanism; the other side of the frame is provided with a driving mechanism for driving the bending mechanism, the clamping mechanism and the positioning mechanism to operate simultaneously. This portable stainless steel pipe bending machine, through the mechanism of bending that sets up, clamping mechanism, location structure are operated by a actuating mechanism drive jointly, automatic adjustment that realizes the position of bending of steel pipe before bending to and the clamp of steel pipe, need not to carry out deliberate regulation fixed to the steel pipe alone, increase the convenience, improved efficiency.

Description

A portable stainless steel pipe bending machine

Technical Field

The invention relates to the technical field of steel pipe processing equipment, and in particular to a portable stainless steel pipe bending machine.

Background Art

Steel pipe bending machine, also known as pipe bending machine, refers to a machine used for bending metal steel pipes at angles. It is roughly divided into CNC pipe bending machine, hydraulic pipe bending machine, etc. The steel pipes used for the lifting legs of the table frame are also processed by pipe bending machines. Among them, wheel molds and pressure strips are mostly used to achieve the bending of steel pipes.

A steel pipe bending machine is disclosed in Chinese invention patent application No.: 202022587786.5, which includes a workbench, a bending seat is provided at one end of the workbench, a rotating wheel is provided at the end of the bending seat away from the workbench, a rotating plate is fixedly provided at the end of the rotating wheel close to the bending seat, a bending groove is provided at the end of the rotating wheel and the rotating plate close to the bending seat, a rotating motor is fixedly provided at the end of the workbench close to the bending seat, the output shaft of the rotating motor is fixedly connected to the end of the bending seat close to the rotating motor, a conveying cylinder is fixedly provided at the end of the workbench away from the bending seat, the output shaft of the conveying cylinder is parallel to the end of the workbench close to the conveying cylinder, an inclined stop is provided at the end of the bending seat close to the bending groove, a bending groove 1 is provided at the end of the inclined stop close to the bending groove, a tilting cylinder is fixedly provided at the end of the bending seat close to the tilting stop, and the output shaft of the tilting cylinder is connected to the end of the tilting stop close to the tilting cylinder.

The above-mentioned prior art requires the steel pipe to be positioned separately before bending, which is achieved by setting up multiple cylinders and other driving sources. The structure is complex and the energy consumption is increased. In addition, the position of the steel pipe needs to be adjusted before positioning so that the bending part corresponds to the bending structure. This is labor-intensive and less convenient.

Therefore, it is necessary to propose a convenient stainless steel pipe bending machine to solve the above problems.

Summary of the invention

The main purpose of the present invention is to provide a convenient stainless steel pipe bending machine, which can effectively solve the problems in the background technology.

To achieve the above object, the technical solution adopted by the present invention is:

A portable stainless steel pipe bending machine comprises a frame;

The front side of the frame is provided with a bending mechanism, the bending mechanism comprises a fixed wheel die arranged at the front side of the frame, and the periphery of the fixed wheel die is provided with a movable wheel die rotating around the fixed wheel die and adapted to the fixed wheel die;

A clamping mechanism corresponding to the bending mechanism is disposed at one end of the front side of the frame, and positioning mechanisms corresponding to the bending mechanism are disposed at both ends of the frame, and the clamping mechanism is located between one of the positioning mechanisms and the bending mechanism;

The other side of the frame is provided with a driving mechanism for driving the bending mechanism, the clamping mechanism and the positioning mechanism to operate simultaneously.

Preferably, a first through groove corresponding to the movable wheel die is formed on the side wall of the frame around the fixed wheel die.

Preferably, the clamping mechanism includes a lower clamping plate arranged on the front side of the frame, an upper clamping plate is arranged above the lower clamping plate, a third through slot is arranged at the corresponding positions of the frame and the upper clamping plate, a second connecting rod is movably connected to the inner side of the third through slot, second connecting plates are symmetrically arranged on both sides of the front end of the second connecting rod, a guide column is movably connected to the second connecting plate, the bottom of the guide column is fixed to the upper clamping plate, and a second spring is sleeved on the guide column between the second connecting plate and the upper clamping plate.

Preferably, arc-shaped grooves adapted to the steel pipe are provided on opposite sides of the lower clamping plate and the upper clamping plate.

Preferably, the positioning mechanism includes a second through slot opened at both ends of the frame, the inner side of the second through slot is movably connected with a first connecting plate, the front end of the first connecting plate is provided with a first displacement plate, the side of the first displacement plate facing the bending mechanism is provided with a positioning plate, the side of the positioning plate close to the first displacement plate is provided with a guide rod, the end of the guide rod away from the positioning plate is movably connected to the first displacement plate, and a first spring is sleeved on the guide rod between the positioning plate and the first displacement plate.

Preferably, a roller is rotatably connected to a side of the positioning plate away from the clamping mechanism and facing the bending mechanism.

Preferably, the driving mechanism includes a third gear rotatably connected to the back of the frame and coaxial with the fixed wheel mold, one side of the third gear is meshed with the second gear, and the other side is meshed with the fourth gear, the lower end of the second gear is meshed with the first gear, a motor is provided on the rear side of the first gear, and a rotating rod that drives the first gear to rotate is provided at the output end of the motor, and the fourth gear is meshed with a rack on the side away from the third gear, and the rack is movably connected to the back of the frame through guide rails, bearing seats are provided at both ends of the back of the frame, and brackets are provided on both sides of the back of the frame close to the third gear, a screw is rotatably connected to the bracket and the bearing seat, and a second bevel gear is provided at the adjacent ends of the two screws, and the back of the third gear is provided with a first bevel gear meshed with the second bevel gear, and the screw thread is matched with a second displacement plate corresponding to the first connecting plate.

Preferably, one side of the second displacement plate is fixedly connected to the first connecting plate; the diameter of the second gear is larger than the diameter of the first gear, the diameter of the third gear is larger than the diameters of the second gear and the fourth gear, and a fixed shaft corresponding to the first through groove is provided on one side of the front face of the third gear, and the fixed shaft extends to the front side of the frame and is connected to the movable wheel mold; one end of the second connecting rod is connected to the rack.

Preferably, the fixed wheel die comprises a disc fixed to the front side of the frame, arc-shaped support bodies are evenly arranged on the periphery of the disc, a first adjustment mechanism is arranged on the disc, the first adjustment mechanism comprises a mounting cavity arranged on the inner side of the disc, a rotating cylinder is arranged on the front side of the disc, a rotating block driven to rotate by the rotating cylinder is arranged on the inner side of the mounting cavity, first connecting rods corresponding to the arc-shaped support bodies are evenly movably connected on the periphery of the rotating block, an adjusting rod extending into the mounting cavity is arranged on the inner side of the arc-shaped support body, and the adjusting rod is movably connected to one end of the first connecting rod away from the rotating block;

A second adjustment mechanism is arranged between the fixed shaft and the movable wheel die, and the second adjustment mechanism includes an adjustment seat arranged between the fixed shaft and the movable wheel die, and the adjustment seat is provided with a groove, and a screw rod is rotatably connected to the inner side of the groove, and a fixed block connected to the movable wheel die is threaded on the screw rod, and one end of the screw rod extends to the outer side of the adjustment seat and is provided with a knob.

Preferably, a protective shell is provided on the outer side of the rear end of the frame, and the motor is fixed to the rear side of the protective shell.

Beneficial Effects

Compared with the prior art, the present invention provides a portable stainless steel pipe bending machine, which has the following beneficial effects:

1. The portable stainless steel pipe bending machine is driven by a driving mechanism through the bending mechanism, clamping mechanism and positioning structure. It can automatically adjust the bending position of the steel pipe and clamp the steel pipe before bending. There is no need to deliberately adjust and fix the steel pipe separately, which increases convenience. Moreover, one motor can realize a series of sequential actions. It has a compact structure and high precision, which increases convenience and improves work efficiency.

2. The portable stainless steel pipe bending machine has a fixed wheel die composed of an arc-shaped support body and a disc. The diameter of the fixed wheel die can be adjusted by coordinating with a rotating cylinder, a rotating block, a first connecting rod and an adjusting rod, thereby changing the curvature of the steel pipe bending. The coordinated setting of the adjusting seat, the screw rod, the fixed block and the knob can adapt to the adjustment of the diameter of the fixed wheel die, which is easy to operate and has increased adaptability.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural diagram of the present invention;

FIG2 is a schematic diagram of the back structure of the frame after the protective shell of the present invention is removed;

FIG3 is a schematic diagram of the inner structure of the fixed wheel mold of the present invention;

FIG4 is a schematic diagram of the overall structure of the adjustment seat and the movable wheel mold of the present invention;

FIG5 is a schematic structural diagram of an adjustment seat of the present invention;

FIG6 is a schematic diagram of the overall structure of the first displacement plate and the positioning plate of the present invention;

FIG. 7 is an enlarged view of point A in FIG. 1 of the present invention.

In the figure: 1, frame; 2, lower clamping plate; 3, protective shell; 4, fixed wheel mold; 5, rotating cylinder; 6, movable wheel mold; 7, adjustment seat; 8, first through slot; 9, second through slot; 10, first displacement plate; 11, positioning plate; 12, motor; 13, rotating rod; 14, first gear; 15, second gear; 16, third gear; 17, fourth gear; 18, rack; 19, guide rail; 20, bearing seat; 21, bracket; 22, second displacement plate; 23, first connecting plate; 24 , screw; 25, first bevel gear; 26, second bevel gear; 27, arc-shaped support body; 28, disk; 29, rotating block; 30, first connecting rod; 31, adjusting rod; 32, mounting cavity; 33, fixed shaft; 34, upper clamping plate; 35, groove; 36, screw; 37, fixed block; 38, knob; 39, roller; 40, guide rod; 41, first spring; 42, third through groove; 43, second connecting plate; 44, guide column; 45, second spring; 46, second connecting rod.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

Example

As shown in Figures 1 to 7, in this embodiment, a portable stainless steel pipe bending machine includes a frame 1, a protective shell 3 is provided on the outer side of the rear end of the frame 1, a bending mechanism is provided on the front side of the frame 1, and the bending mechanism includes a fixed wheel die 4 arranged on the front side of the frame 1, and a movable wheel die 6 that rotates around the fixed wheel die 4 and is adapted to the fixed wheel die 4 is provided on the periphery of the fixed wheel die 4; a first through groove 8 corresponding to the movable wheel die 6 is opened on the side wall of the frame 1 outside the fixed wheel die 4; a clamping mechanism corresponding to the bending mechanism is provided at one end of the front side of the frame 1, and positioning mechanisms corresponding to the bending mechanism are provided at both ends of the frame 1, and the clamping mechanism is located between one of the positioning mechanisms and the bending mechanism; a driving mechanism that drives the bending mechanism, the clamping mechanism, and the positioning mechanism to operate simultaneously is provided on the other side of the frame 1.

As an embodiment, the clamping mechanism includes a lower clamping plate 2 arranged on the front side of the frame 1, an upper clamping plate 34 is arranged above the lower clamping plate 2, an arc groove adapted to the steel pipe is arranged on the opposite side of the lower clamping plate 2 and the upper clamping plate 34, a third through groove 42 is arranged at the corresponding position of the frame 1 and the upper clamping plate 34, a second connecting rod 46 is movably connected to the inner side of the third through groove 42, and second connecting plates 43 are symmetrically arranged on both sides of the front end of the second connecting rod 46, and a guide column 44 is movably connected to the second connecting plate 43, and the bottom of the guide column 44 is fixed on the upper clamping plate 34, and a second spring 45 is sleeved on the guide column 44 between the second connecting plate 43 and the upper clamping plate 34.

As an embodiment, the positioning mechanism includes a second through slot 9 opened at both ends of the frame 1, the inner side of the second through slot 9 is movably connected with a first connecting plate 23, a first displacement plate 10 is arranged at the front end of the first connecting plate 23, a positioning plate 11 is arranged on the side of the first displacement plate 10 facing the bending mechanism, a roller 39 is rotatably connected to the side of the positioning plate 11 facing the bending mechanism away from the clamping mechanism, a guide rod 40 is arranged on the side of the positioning plate 11 close to the first displacement plate 10, an end of the guide rod 40 away from the positioning plate 11 is movably connected to the first displacement plate 10, and a first spring 41 is sleeved on the guide rod 40 between the positioning plate 11 and the first displacement plate 10.

As an embodiment, the driving mechanism includes a third gear 16 which is rotatably connected to the back of the frame 1 and is coaxial with the fixed wheel mold 4. The second gear 15 is meshed on one side of the third gear 16, and the fourth gear 17 is meshed on the other side. The lower end of the second gear 15 is meshed with the first gear 14. The diameter of the second gear 15 is larger than the diameter of the first gear 14. The diameter of the third gear 16 is larger than the diameter of the second gear 15 and the fourth gear 17. A fixed shaft 33 corresponding to the first through groove 8 is provided on one side of the front of the third gear 16. The fixed shaft 33 extends to the front side of the frame 1 and is connected to the movable wheel mold 6. A motor 12 is provided on the rear side of the first gear 14. The motor 12 is fixed to the rear side of the protective shell 3. The output end of the motor 12 is provided with a drive for the first gear 14. The rotating rod 13 rotates, and a rack 18 is meshed with the side of the fourth gear 17 away from the third gear 16. One end of the second connecting rod 46 is connected to the rack 18, and the rack 18 is movably connected to the back of the frame 1 through a guide rail 19. Bearing seats 20 are provided at both ends of the back of the frame 1, and brackets 21 are provided on both sides of the back of the frame 1 close to the third gear 16. The brackets 21 and the bearing seats 20 are rotatably connected with screws 24, and the adjacent ends of the two screws 24 are provided with second bevel gears 26. The back of the third gear 16 is provided with a first bevel gear 25 meshing with the second bevel gear 26. The screw 24 is threadedly matched with a second displacement plate 22 corresponding to the first connecting plate 23, and one side of the second displacement plate 22 is fixedly connected to the first connecting plate 23.

As an embodiment, the fixed wheel mold 4 includes a disc 28 fixed to the front side of the frame 1, and the outer periphery of the disc 28 is evenly provided with arc-shaped support bodies 27, and the disc 28 is provided with a first adjustment mechanism, and the first adjustment mechanism includes a mounting cavity 32 arranged on the inner side of the disc 28, and the front side of the disc 28 is provided with a rotating cylinder 5, and the inner side of the mounting cavity 32 is provided with a rotating block 29 driven to rotate by the rotating cylinder 5, and the outer periphery of the rotating block 29 is evenly and movably connected with first connecting rods 30 corresponding to the arc-shaped support bodies 27, and the inner side of the arc-shaped support body 27 is provided with an adjustment rod 31 extending into the mounting cavity 32, and the adjustment rod 31 is movably connected to one end of the first connecting rod 30 away from the rotating block 29;

Furthermore, a second adjustment mechanism is provided between the fixed shaft 33 and the movable wheel die 6, and the second adjustment mechanism includes an adjustment seat 7 provided between the fixed shaft 33 and the movable wheel die 6, and a groove 35 is provided on the adjustment seat 7, and a screw rod 36 is rotatably connected to the inner side of the groove 35, and a fixed block 37 connected to the movable wheel die 6 is threadedly fitted on the screw rod 36, and one end of the screw rod 36 extends to the outer side of the adjustment seat 7 and is provided with a knob 38.

Working principle: when in use, the rotating cylinder 5 is controlled as needed, and the rotating cylinder 5 drives the rotating block 29 to rotate. The rotating block 29 drives the adjusting rod 31 to move through the first connecting rod 30, and the adjusting rod 31 drives the arc-shaped support body 27 to move until the diameter is appropriate, and then the rotating knob 38 drives the screw rod 36 to rotate, and the screw rod 36 drives the fixed block 37 to move until the distance between the movable wheel mold 6 and the fixed wheel mold 4 is appropriate, and then the steel pipe is placed on the lower clamping plate 2 and the fixed wheel mold 4 for support, and then the motor 12 is started to drive the first gear 14 to rotate, and the first gear 14 drives the second gear 15 The second gear 15 drives the third gear 16 to rotate, and the third gear 16 drives the first bevel gear 25, the fourth gear 17, and the fixed shaft 33 to rotate. The fixed shaft 33 drives the movable wheel mold 6 to rotate around the fixed wheel mold 4. The first bevel gear 25 drives the two screws 24 to rotate through the second bevel gear 26. The screws 24 drive the two second displacement plates 22 to move closer. The second displacement plate 22 drives the first displacement plate 10 to move through the first connecting plate 23. The first displacement plate 10 pushes the steel pipe through the positioning plate 11. The two positioning plates 11 can adjust the complete part of the steel pipe to the fixed position. The fourth gear 17 drives the rack 18 to move downward, and the rack 18 drives the upper clamping plate 34 downward to clamp the steel pipe through the second connecting rod 46. Then the movable wheel die 6 applies pressure to the steel pipe to cooperate with the fixed wheel die 4 to achieve bending. After bending, the motor 12 reverses, the bending mechanism, the clamping mechanism, and the positioning mechanism are reset, and the steel pipe can be removed. In addition, the rack 18 and the screw 24 are still running during the bending process. At this time, the second connecting plate 43 cooperates with the upper clamping plate 34 to compress the second spring 45, and the first displacement plate 10 cooperates with the positioning plate 11 to compress the first spring 41 , so as to adapt to the operation of the rack 18 and the screw 24, and one end of the steel pipe contacts the roller 39 on the side of the positioning plate 11, which is convenient for the steel pipe to be separated from the positioning plate 11 when bending, and can reduce friction. The device is driven by a driving mechanism through the bending mechanism, clamping mechanism, and positioning structure set up, and automatically adjusts the bending part of the steel pipe and clamps the steel pipe before bending. There is no need to deliberately adjust and fix the steel pipe separately, which increases convenience. Moreover, one motor 12 can realize a series of sequential actions, with compact structure and high precision, which increases convenience and improves work efficiency.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (10)

1. A portable stainless steel pipe bending machine, comprising a frame (1); The invention is characterized in that: a bending mechanism is arranged on the front side of the frame (1), the bending mechanism comprises a fixed wheel die (4) arranged on the front side of the frame (1), and a movable wheel die (6) is arranged on the periphery of the fixed wheel die (4) and rotates around the fixed wheel die (4) and is adapted to the fixed wheel die (4); A clamping mechanism corresponding to the bending mechanism is provided at one end of the front side of the frame (1), and positioning mechanisms corresponding to the bending mechanism are provided at both ends of the frame (1), and the clamping mechanism is located between one of the positioning mechanisms and the bending mechanism; The other side of the frame (1) is provided with a driving mechanism for driving the bending mechanism, the clamping mechanism and the positioning mechanism to operate simultaneously. 2. A portable stainless steel pipe bending machine according to claim 1, characterized in that a first through groove (8) corresponding to the movable wheel die (6) is provided on the side wall of the frame (1) outside the fixed wheel die (4). 3. A portable stainless steel pipe bending machine according to claim 2, characterized in that: the clamping mechanism comprises a lower clamping plate (2) arranged on the front side of the frame (1), an upper clamping plate (34) is arranged above the lower clamping plate (2), a third through slot (42) is arranged at the corresponding position of the frame (1) and the upper clamping plate (34), a second connecting rod (46) is movably connected to the inner side of the third through slot (42), second connecting plates (43) are symmetrically arranged on both sides of the front end of the second connecting rod (46), a guide column (44) is movably connected to the second connecting plate (43), the bottom of the guide column (44) is fixed on the upper clamping plate (34), and a second spring (45) is sleeved on the guide column (44) between the second connecting plate (43) and the upper clamping plate (34). 4. A portable stainless steel pipe bending machine according to claim 3, characterized in that arc grooves adapted to the steel pipe are provided on opposite sides of the lower clamping plate (2) and the upper clamping plate (34). 5. A portable stainless steel pipe bending machine according to claim 1, characterized in that: the positioning mechanism comprises a second through slot (9) opened at both ends of the frame (1), the inner side of the second through slot (9) is movably connected with a first connecting plate (23), a first displacement plate (10) is arranged at the front end of the first connecting plate (23), a positioning plate (11) is arranged on the side of the first displacement plate (10) facing the bending mechanism, a guide rod (40) is arranged on the side of the positioning plate (11) close to the first displacement plate (10), an end of the guide rod (40) away from the positioning plate (11) is movably connected to the first displacement plate (10), and a first spring (41) is sleeved on the guide rod (40) between the positioning plate (11) and the first displacement plate (10). 6. A portable stainless steel pipe bending machine according to claim 5, characterized in that a roller (39) is rotatably connected to the side of the positioning plate (11) away from the clamping mechanism and facing the bending mechanism. 7. A portable stainless steel pipe bending machine according to claim 6, characterized in that: the driving mechanism comprises a third gear (16) rotatably connected to the back of the frame (1) and coaxial with the fixed wheel die (4), one side of the third gear (16) is meshed with the second gear (15), and the other side is meshed with the fourth gear (17), the lower end of the second gear (15) is meshed with the first gear (14), the rear side of the first gear (14) is provided with a motor (12), the output end of the motor (12) is provided with a rotating rod (13) for driving the first gear (14) to rotate, and the side of the fourth gear (17) away from the third gear (16) is meshed with a gear The rack (18) is movably connected to the back of the frame (1) through a guide rail (19); bearing seats (20) are arranged at both ends of the back of the frame (1); brackets (21) are arranged on both sides of the back of the frame (1) close to the third gear (16); screw rods (24) are rotatably connected to the brackets (21) and the bearing seats (20); second bevel gears (26) are arranged at the adjacent ends of the two screw rods (24); a first bevel gear (25) meshing with the second bevel gear (26) is arranged on the back of the third gear (16); and a second displacement plate (22) corresponding to the first connecting plate (23) is threadedly matched on the screw rod (24). 8. A portable stainless steel pipe bending machine according to claim 7, characterized in that: one side of the second displacement plate (22) is fixedly connected to the first connecting plate (23); the diameter of the second gear (15) is larger than the diameter of the first gear (14), the diameter of the third gear (16) is larger than the diameters of the second gear (15) and the fourth gear (17), and a fixed shaft (33) corresponding to the first through groove (8) is provided on one side of the front of the third gear (16), and the fixed shaft (33) extends to the front side of the frame (1) and is connected to the movable wheel mold (6); one end of the second connecting rod (46) is connected to the rack (18). 9. A portable stainless steel pipe bending machine according to claim 8, characterized in that: the fixed wheel die (4) comprises a disc (28) fixed to the front side of the frame (1), the outer periphery of the disc (28) is evenly provided with arc-shaped support bodies (27), the disc (28) is provided with a first adjustment mechanism, the first adjustment mechanism comprises a mounting cavity (32) arranged on the inner side of the disc (28), a rotating cylinder (5) is arranged on the front side of the disc (28), a rotating block (29) driven to rotate by the rotating cylinder (5) is arranged on the inner side of the mounting cavity (32), the outer periphery of the rotating block (29) is evenly and movably connected with first connecting rods (30) corresponding to the arc-shaped support bodies (27), the inner side of the arc-shaped support body (27) is provided with an adjustment rod (31) extending into the installation cavity (32), and the adjustment rod (31) is movably connected to one end of the first connecting rod (30) away from the rotating block (29); A second adjustment mechanism is provided between the fixed shaft (33) and the movable wheel die (6), the second adjustment mechanism comprising an adjustment seat (7) provided between the fixed shaft (33) and the movable wheel die (6), the adjustment seat (7) being provided with a groove (35), the inner side of the groove (35) being rotatably connected to a screw rod (36), the screw rod (36) being threadedly engaged with a fixed block (37) connected to the movable wheel die (6), one end of the screw rod (36) extending to the outer side of the adjustment seat (7) and being provided with a knob (38). 10. A portable stainless steel pipe bending machine according to claim 9, characterized in that a protective shell (3) is provided on the outer side of the rear end of the frame (1), and the motor (12) is fixed on the protective shell (3).