CN218611175U - Bending machine - Google Patents

Abstract

The application relates to a bending machine, it includes the frame, sets up in the pipe bending piece and the pushing mechanism of frame, the pipe bending piece includes bending die and roof pressure seat, the bending die sets up in the frame, roof pressure seat fixed connection is in the pushing end of pushing mechanism, the roof pressure seat slides and connects in the frame, the bending groove that is used for confirming the radius of bending is offered to the roof pressure seat, the bending die is located the pushing mechanism and pushes away the motion path of end, the bending die is located the vertical projection in bending groove, just the center of bending die is located a straight line with the center in bending groove. This application can reach more stable effect of bending when bending the pipeline.

Description

Bending machine

Technical Field

The application relates to the technical field of pipe machining equipment, in particular to a bending machine.

Background

A pipe is a device for transporting a gas, a liquid or a fluid with solid particles. Pipelines are also commonly used in some refrigeration and heating equipment such as air conditioners, boilers and the like, high-temperature substances such as steam, hot water and the like can flow in the pipelines to serve as heating pipelines, and refrigeration substances such as cooling liquid, gaseous refrigerants and the like can flow in the pipelines to serve as cooling pipelines. Often times, the piping is laid to increase the heat transfer area, and it is often necessary to bend the piping to form a coil.

At present, the bending machine is commonly used for bending and bending a pipeline and comprises a frame, a mandrel mechanism, a workpiece clamping device and a pipe bending device, wherein the pipe bending device comprises a pipe bending machine head, a rotatable bending die part and a driving device for driving the bending die part to rotate, the pipe bending machine head is connected to one side of the frame, and the bending die part and the driving device are arranged on the pipe bending machine head. The pipe is placed on the machine frame and adjacently arranged on the mandrel mechanism, the pipe is fixed by the workpiece clamping device, the pipe is located between the mandrel mechanism and the bending die component, and then the bending die component is driven to move relative to the arc surface of the mandrel mechanism so as to bend the pipe along the arc surface of the mandrel mechanism.

However, since the bending die component bends one end of the pipeline, which is positioned at the mandrel mechanism, the other end of the pipeline generates acting force generated by resisting deformation, and the other end of the pipeline has a tendency of being separated from the workpiece clamping device. After long-term use, the workpiece clamping device is easily damaged and loses efficacy due to acting force generated by the pipeline on the workpiece clamping device, so that the pipeline is loosened and even falls off relative to the workpiece clamping device, the bending of the bending die component on the pipeline is not stable enough, and the pipeline cannot be bent even due to insufficient bending radius.

SUMMERY OF THE UTILITY MODEL

In order to reach more stable effect of bending when bending the pipeline, this application provides a crib crimper.

The application provides a crib crimper adopts following technical scheme:

the utility model provides a bending machine, includes the frame, sets up in the pipe bending piece and the pushing mechanism of frame, the pipe bending piece includes bending die and roof pressure seat, the bending die sets up in the frame, roof pressure seat fixed connection is in the pushing end of pushing mechanism, the roof pressure seat slides and connects in the frame, the bending groove that is used for confirming the radius of bending is seted up to the roof pressure seat, the bending die is located the pushing mechanism and pushes away the motion route of end, the bending die is located the vertical projection in bending groove, just the center of bending die is located a straight line with the center in bending groove.

By adopting the technical scheme, when the pipeline is bent, the pipeline is placed at the opening edge of the bending groove, and the pipeline corresponds to the die cavity of the pipe bending die. The pushing mechanism is driven to push the jacking seat towards the bending die, so that the pipeline is pushed towards the bending die continuously, the bending die pushes the contact part of the bending die and the pipeline in a bending groove, and finally the bending die bends the pipeline to deform to the outer wall of the pipeline and the inner side wall of the bending groove to be attached to each other, and the bending of the pipeline is completed. When the pipe bending die bends a pipe by taking the jacking seat as a fulcrum, acting force generated by the pipe for resisting deformation is uniformly distributed on the opening edges of the two opposite sides of the bending groove, so that abrasion deformation generated by the bending groove is relatively synchronous, and after the abrasion deformation generated by the bending groove, the pushing mechanism pushes the jacking seat to bend the pipe, the required bending radius can be still achieved, and a more stable bending effect can be achieved when the pipe is bent.

Optionally, the pushing mechanism includes a hydraulic cylinder and two pushing rods, the hydraulic cylinder is fixedly connected to the base, the two pushing rods are hinged to piston rods of the hydraulic cylinder, one pushing rod is hinged to the base at the same time, the other pushing rod is hinged to the pushing base at the same time, and the rotation planes of the two pushing rods relative to the hydraulic cylinder are the same; and the sliding path of the jacking seat relative to the rack is positioned in the rotating plane of the two jacking rods relative to the hydraulic cylinder, and the pipe bending die is positioned at one end of the machine seat far away from the jacking rods.

Through adopting above-mentioned technical scheme, start the pneumatic cylinder, the relative pneumatic cylinder of two ejector pin of pneumatic cylinder drive takes place to rotate, contained angle grow gradually between two ejector pin, and interval grow between the one end that two ejector pin kept away from mutually is because one of them ejector pin articulates in the frame, and another ejector pin articulates in the roof pressure seat, and the ejector pin promotes the roof pressure seat towards the bending die utensil to make the roof pressure seat use the bending die utensil to bend to the pipeline as the fulcrum.

Optionally, the two ejector rods are hinged to the piston rod of the hydraulic cylinder through bearing blocks, the bearing blocks are hinged to the piston rod of the hydraulic cylinder, and the two ejector rods are hinged to the bearing blocks simultaneously.

Through adopting above-mentioned technical scheme, because the effort that the pipeline produced for resisting the deformation can be exerted in the top pressure seat, the top pressure seat conducts the effort to the ejector pin, because two ejector pins all articulate in the piston rod of pneumatic cylinder, the piston rod of pneumatic cylinder is difficult to bear the effort as power take off end. The bearing block bears the acting force transmitted to the ejector rod, so that the vertical component of the acting force generated by the pipeline for resisting deformation is directly transmitted to the other ejector rod and the base through the bearing block, the piston rod of the hydraulic cylinder only bears the component force in one horizontal direction, the size of the acting force generated by the pipeline for resisting deformation and transmitted to the piston rod of the hydraulic cylinder is reduced, and the service life of the piston rod of the hydraulic cylinder is prolonged.

Optionally, the pushing seat is connected to the base through a sliding part in a sliding manner, the sliding part includes a sliding rail and a sliding block, the sliding rail is fixedly connected to the base, the sliding rail extends along a movement path of a pushing end of the pushing mechanism, and the sliding block is connected to the sliding rail in a sliding manner.

Through adopting above-mentioned technical scheme, when the ejector pin promoted the roof pressure die holder towards the bending die, through the slip of the relative slide rail of slider, make the roof pressure die holder steadily shift and connect in the frame, make the roof pressure die holder be close to towards the bending die steadily, when reducing the ejector pin and promoting the roof pressure die holder towards the bending die, the skew takes place for the relative frame of roof pressure die holder, and make the bending die be difficult to aim at the bending groove, and make the bending die to the bending point of pipeline deviation, lead to the bending effect variation to the pipeline.

Optionally, the bending groove is provided with an adjusting member for adjusting the bending radius of the bending groove.

By adopting the technical scheme, the radius of the bending groove when the pipeline is bent is adjusted through the adjusting piece, so that the requirement of bending the pipeline with different bending radii is met.

Optionally, the bending groove of top pressure seat is along the setting of running through of the direction of placing of pipeline, two lateral opening border in bending groove are provided with the roof pressure pole respectively, a plurality of screws have all been seted up at the relative both sides border in bending groove side opening, and a plurality of screws at the relative both sides border in bending groove side opening all set up relatively, the regulating part includes two bolts, two the bolt is corresponding respectively to wear to locate two screws that bending groove side opening is relative, and two the bolt is inserted simultaneously and is established and threaded connection in the both ends of roof pressure pole.

Through adopting above-mentioned technical scheme, through the both ends with two bolts back-off roof pressure pole to withdraw two bolts and press the seat, wear to locate two relative screws of position again with the roof pressure pole, make the roof pressure pole change to the position of the groove diapire that bends, radius when changing the groove that bends to the pipeline, bend in order to satisfy the pipeline to different radius requirements that bends.

Optionally, the top pressure rod is sleeved outside and rotatably connected with a sleeve.

By adopting the technical scheme, the contact part of the bending die and the pipeline is pushed into the bending groove by the bending die, finally the pipeline is bent and deformed by the bending die to the condition that the outer wall of the pipeline is mutually attached to the inner side wall of the bending groove, the friction resistance of relative sliding between the pushed Cheng Zhongguan pipeline and the jacking rod is large, the sliding of the pipeline and the jacking rod is changed into rolling by the sleeve, so that the friction resistance of mutual movement between the pipeline and the jacking rod is reduced, and the jacking rod is not easy to generate abrasion deformation due to the friction between the jacking rod and the pipeline.

Optionally, the bending die sets up in the frame through the mount pad, mount pad fixed connection is in the frame, the mount pad is U-shaped plate column structure, the equal fixedly connected with bead of the both sides inner wall that the mount pad is relative, the both sides lateral wall that the bending die kept away from mutually all has begun the draw-in groove, the bending die is located the U-shaped opening of mount pad, two the bead corresponds the card respectively and establishes two draw-in grooves, the mount pad is provided with the locating part that is used for restricting the bending die mount pad that slides.

Through adopting above-mentioned technical scheme, when bending the pipeline of different pipe diameters, make the locating part no longer restrict the relative mount pad roll-off of bending die, slide into the bending die of unidimensional spout in the U-shaped opening of mount pad again, two beads correspond respectively to block establish in two draw-in grooves of bending die, make the locating part again and restrict the bending die and slide out of the mount pad, so that change the bending die of unidimensional spout, so that the bending die can bend the pipeline of different pipe diameters.

Optionally, the limiting part comprises a limiting block rotatably connected to the mounting seat, a limiting rod fixedly connected to the limiting block, and a limiting buckle fixedly connected to the mounting seat, the rotating plane of the limiting block relative to the mounting seat covers the sliding-out path of the bending die relative to the mounting seat, and the limiting rod is clamped in the limiting buckle.

Through adopting above-mentioned technical scheme, rotate the stopper to the roll-off route of the relative mount pad of bending die on, the gag lever post can block just and establish into spacing buckle this moment in for the stopper restricts the U-shaped opening that the bending die slided out the mount pad steadily. The limiting rod is withdrawn from the limiting buckle, and the limiting block is rotated and does not shield the sliding-out path of the bending die relative to the mounting seat, so that the bending die can be replaced conveniently.

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

1. when the pipe bending die bends a pipe by taking the jacking seat as a fulcrum, acting force generated by the pipe for resisting deformation is uniformly distributed on the opening edges of the two opposite sides of the bending groove, so that the abrasion deformation of the bending groove is relatively synchronous, and a pushing mechanism can still reach the required bending radius when pushing the jacking seat to bend the pipe, so that a more stable bending effect can be achieved when the pipe is bent;

2. the vertical component of the acting force generated by the pipeline for resisting deformation is directly transmitted to the other ejector rod and the base through the bearing block, so that the piston rod of the hydraulic cylinder only bears the component force in one horizontal direction, the size of the acting force generated by the pipeline for resisting deformation and transmitted to the piston rod of the hydraulic cylinder is reduced, and the service life of the piston rod of the hydraulic cylinder is prolonged;

3. the radius of the bending groove when bending the pipeline is adjusted through the adjusting piece, so that the requirement of bending the pipeline with different bending radii is met.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic structural view of a slide in an embodiment of the present application.

Fig. 3 is a schematic structural view of the ejector rod and the adjusting member in the embodiment of the present application.

Fig. 4 is a schematic structural diagram of a mounting seat, a bending die and a limiting member in an embodiment of the present application.

Reference numerals are as follows: 1. a machine base; 11. a base; 12. a support bar; 13. a bearing seat; 2. pipe bending parts; 21. a pipe bending die; 211. a die cavity; 212. a card slot; 22. a jacking seat; 221. bending the groove; 222. a top pressure rod; 223. a screw hole; 3. a pushing mechanism; 31. a hydraulic cylinder; 32. pushing the push rod; 33. a bearing block; 4. a sliding member; 41. a slide rail; 42. a slider; 421. a roller; 5. an adjustment member; 51. a bolt; 6. a sleeve; 7. a mounting seat; 71. a rib; 8. a limiting member; 81. a limiting block; 82. a limiting rod; 83. and a limiting buckle.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses crib crimper. Referring to fig. 1, the bending machine includes a base 1, a bending pipe 2 and a pushing mechanism 3, the bending pipe 2 is disposed on the base 1, the base 1 includes a base 11, two support rods 12 and a bearing seat 13, the two support rods 12 are parallel to each other, the two support rods 12 are fixedly connected to the base 11, the two support rods 12 are perpendicularly disposed on the base 11, and the bearing seat 13 is fixedly connected to one end of the two support rods 12 far away from the base 11.

Referring to fig. 1, the pushing mechanism 3 is disposed on the base 11, the pushing mechanism 3 includes a hydraulic cylinder 31 and two pushing rods 32, the hydraulic cylinder 31 is fixedly connected to the base 11, and a telescopic path of a piston rod of the hydraulic cylinder 31 is parallel to the base 11. The two ejector push rods 32 are hinged to the piston rods of the hydraulic cylinders 31 through the bearing blocks 33, the bearing blocks 33 are hinged to the piston rods of the hydraulic cylinders 31, and one ends of the two ejector push rods 32 are hinged to the bearing blocks 33 simultaneously. The other end of one of the push rods 32 is hinged to the machine base 1, and the other end of the other push rod 32 is hinged to the jacking seat 22. The two ejector push rods 32 have the same rotating plane relative to the hydraulic cylinder 31, the rotating plane of the two ejector push cylinders relative to the hydraulic cylinder 31 is perpendicular to the plane of the two support rods 12, and the two ejector push rods 32 are vertically arranged relative to the rotating plane of the hydraulic cylinder 31.

Referring to fig. 1, the pipe bending part 2 includes a pipe bending mold 21 and a pressing seat 22, the pipe bending mold 21 is disposed on a side wall of the bearing seat 13 facing the base 11, the pressing seat 22 is connected to the two support rods 12 by two sliding parts 4, and the two sliding parts 4 are disposed on the two support rods 12 respectively. The pushing rod 32 far away from the base 11 is hinged to the pushing seat 22, and the pushing seat 22 is located below the pipe bending die 21. The top pressing seat 22 is provided with a bending groove 221, the opening direction of the bending groove 221 is arranged towards the bending die 21, and the cross section contour of the bending groove 221 is arranged in a V shape. The long side of the opening edge of the bending groove 221 extends along the cavity 211 of the bending die 21. The center of the bending die 21 and the center of the bending groove 221 are positioned on a straight line

Referring to fig. 1, a side wall of the bending mold 21 facing the pressing base 22 is disposed in an arc shape, and an arc opening of the bending mold 21 is disposed opposite to the pressing base 22. Die cavity 211 has been seted up to one side lateral wall of bending die 21 towards top pressure seat 22, and die cavity 211 extends the setting along bending die 21's arcwall face, and the opening of die cavity 211 sets up towards top pressure seat 22, and the cell wall of die cavity 211 is the arc setting.

When the pipe is bent, the pipe is placed at the opening edge of the bending groove 221, and the pipe corresponds to the die cavity 211 of the bending die 21. The hydraulic cylinder 31 is started, and the piston rod of the hydraulic cylinder 31 drives the two push rods 32 to rotate relative to the hydraulic cylinder 31. The included angle between the two ejector pins 32 becomes gradually larger, and the distance between the ends of the two ejector pins 32 away from each other becomes larger. Since one of the ejector rods 32 is hinged to the machine base 1 and the other ejector rod 32 is hinged to the ejector base 22, the ejector rod 32 pushes the ejector base 22 toward the pipe bending die 21.

During the continuous approach of the pipeline towards the bending mold 21 along with the top pressing seat 22, the bending mold 21 pushes the contact part of the bending mold 21 and the pipeline into the bending groove 221, and finally the bending mold 21 bends and deforms the pipeline until the outer wall of the pipeline is attached to the inner side wall of the bending groove 221, so as to complete the bending of the pipeline. When the pipe bending die 21 bends the pipe with the jacking seat 22 as a fulcrum, the acting force generated by the pipe for resisting deformation is uniformly distributed at the opening edges of the two opposite sides of the bending groove 221, so that the abrasion deformation of the bending groove 221 is relatively synchronous, and the jacking mechanism 3 can still reach the required bending radius when jacking the jacking seat 22 to bend the pipe, thereby achieving a more stable bending effect when bending the pipe.

The force of the tubing against deformation is applied to the anvil 22 and the anvil 22 transmits the force to the ejector pin 32. Because both ejector push rods 32 are hinged to the piston rods of the hydraulic cylinders 31, the piston rods of the hydraulic cylinders 31 are difficult to bear acting force as power output ends. The bearing block 33 enables the vertical component force of the acting force generated by the pipeline for resisting deformation to be directly transmitted to the push rod 32 and the base 1 below through the bearing block 33, and the piston rod of the hydraulic cylinder 31 only bears the component force in one horizontal direction, so that the magnitude of the acting force generated by the pipeline for resisting deformation and transmitted to the piston rod of the hydraulic cylinder 31 is reduced, and the service life of the hydraulic cylinder 31 is prolonged.

Referring to fig. 1 and 2, the sliding member 4 includes a sliding rail 41 and a sliding block 42, the sliding rail 41 is fixedly connected to the supporting rod 12, the sliding rail 41 extends along the length direction of the supporting rod 12, and the cross-sections of the sliding rail 41 along the two side edges of the supporting rod 12 in the length direction are arranged in a sharp angle. The sliding block 42 is rotatably connected with a plurality of rollers 421, and the rollers 421 are respectively located at two sides of the sliding rail 41. The sliding grooves are formed in the rolling surfaces of the rollers 421, and are arranged around the centers of the rollers 421. The two side edges of the sliding rail 41 are respectively embedded in the sliding grooves of the rollers 421.

Through the roll of the relative slide rail 41 of gyro wheel 421 of rotation connection in slider 42 for top pressure seat 22 steadily shifts and connects in frame 1, make top pressure seat 22 be close to towards bending die 21 steadily, when reducing ejector pin 32 and promote top pressure seat 22 towards bending die 21, top pressure seat 22 takes place the skew relative frame 1, and make bending die 21 be difficult to aim at bending groove 221, and make bending die 21 to the bending point of pipeline take place the deviation, lead to the bending effect variation to the pipeline.

Referring to fig. 1 and 3, for the pipe that different bending radii required to press and bend, the bending groove 221 of roof pressure seat 22 is along the direction of placing of pipe and is the setting that runs through, and a plurality of screw 223 have all been seted up at the relative border of two side openings in bending groove 221, and a plurality of screw 223 homogeneous phases of the relative both sides border of side opening in bending groove 221 are relative to be set up. The opening edges of the two side openings of the bending groove 221 are respectively provided with a top pressure rod 222, and the top pressure rods 222 simultaneously penetrate through the two screw holes 223 of the bending groove 221, the side openings of which are opposite. The bending groove 221 is provided with an adjusting member 5, the adjusting member 5 includes two bolts 51, the two bolts 51 respectively penetrate through two screw holes 223 opposite to the side opening of the bending groove 221, and the two bolts 51 are inserted at the same time and are connected to two ends of the top pressure rod 222 through threads. The top pressure bar 222 is sleeved and rotatably connected with the sleeve 6.

The two bolts 51 are screwed out of the two ends of the pressing rod 222, the two bolts 51 are withdrawn from the pressing seat 22, and the pressing rod 222 is inserted into the two opposite screw holes 223 at the position again, so that the position from the pressing rod 222 to the bottom wall of the bending groove 221 is changed, the radius of the bending groove 221 during bending of the pipeline is changed, and the requirement of bending the pipeline with different bending radii is met.

In the process that the pipe bending die 21 bends and deforms the pipe until the outer wall of the pipe is attached to the inner side wall of the bending groove 221, the friction resistance of relative sliding between the pipe and the top pressure rod 222 is large, and the sleeve 6 changes sliding of the pipe and the top pressure rod 222 into rolling, so that the friction resistance of mutual movement between the pipe and the top pressure rod 222 is reduced, and the top pressure rod 222 is not prone to wear and deformation due to the friction between the top pressure rod 222 and the pipe.

Referring to fig. 1 and 4, in order to bend pipelines with different pipe diameters, the bending die 21 is disposed on the bearing seat 13 through the mounting seat 7, and the mounting seat 7 is fixedly connected to the bearing seat 13. The mounting base 7 is a U-shaped plate structure, the inner walls of two opposite sides of the mounting base 7 are fixedly connected with convex ribs 71, the side walls of two sides of the bending die 21 away from each other are provided with clamping grooves 212, the bending die 21 is located in the U-shaped opening of the mounting base 7, and the two convex ribs 71 are correspondingly clamped in the two clamping grooves 212 respectively.

Referring to fig. 1 and 4, the mounting seat 7 is provided with a limiting member 8, the limiting member 8 includes a limiting buckle 83, a limiting rod 82 and two limiting blocks 81, the two limiting blocks 81 are respectively rotatably connected to two side opening edges of the mounting seat 7, and a rotating plane of the limiting block 81 relative to the mounting seat 7 covers a sliding-out path of the bending die 21 relative to the mounting seat 7. The limiting rod 82 is fixedly connected to the two limiting blocks 81, and the limiting rod 82 is located on one side of the mounting base 7 in the horizontal direction. Spacing buckle 83 fixed connection is in the lateral wall of one side of the orientation gag lever post 82 of mount pad 7, and spacing buckle 83 is located gag lever post 82's moving path, and spacing buckle 83 is made for elastic material.

When the pipelines with different pipe diameters are bent, the limiting rod 82 is withdrawn from the limiting buckle 83, and the limiting block 81 is rotated to prevent the limiting block from blocking the sliding-out path of the pipe bending die 21 relative to the mounting seat 7. The bending dies 21 with chutes of different sizes are slid into the U-shaped openings of the mounting base 7, and the two protruding ribs 71 are correspondingly clamped in the two clamping grooves 212 of the bending dies 21 respectively. The limiting block 81 is rotated to the slide-out path of the bending die 21 relative to the mounting seat 7, and the limiting rod 82 can be just clamped into the limiting buckle 83 at the moment, so that the limiting block 81 stably limits the bending die 21 to slide out of the U-shaped opening of the mounting seat 7, and the bending die 21 is stably mounted on the bearing seat 13. So as to replace the bending die 21 of the chutes with different sizes, and bend the pipelines with different pipe diameters by the bending die 21.

The implementation principle of this application embodiment crib crimper does: when the pipe is bent, the pipe is placed at the opening edge of the bending groove 221, and the pipe corresponds to the die cavity 211 of the bending die 21. The hydraulic cylinder 31 is started, and the piston rod of the hydraulic cylinder 31 drives the two push rods 32 to rotate relative to the hydraulic cylinder 31. The included angle between the two ejector pins 32 becomes larger gradually, and the distance between the ends of the two ejector pins 32 away from each other becomes larger. Since one of the ejector rods 32 is hinged to the machine base 1 and the other ejector rod 32 is hinged to the ejector base 22, the ejector rod 32 pushes the ejector base 22 toward the pipe bending die 21.

During the continuous approach of the pipeline towards the bending mold 21 along with the top pressing seat 22, the bending mold 21 pushes the contact part of the bending mold 21 and the pipeline into the bending groove 221, and finally the bending mold 21 bends and deforms the pipeline until the outer wall of the pipeline is attached to the inner side wall of the bending groove 221, so as to complete the bending of the pipeline. When the pipe bending die 21 bends the pipe with the jacking seat 22 as a fulcrum, the acting force generated by the pipe for resisting deformation is uniformly distributed at the opening edges of the two opposite sides of the bending groove 221, so that the abrasion deformation of the bending groove 221 is relatively synchronous, and the jacking mechanism 3 can still reach the required bending radius when jacking the jacking seat 22 to bend the pipe, thereby achieving a more stable bending effect when bending the pipe.

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

Claims (9)

1. A bending machine is characterized in that: including frame (1), set up in return bend spare (2) and pushing mechanism (3) of frame (1), return bend spare (2) include bending die utensil (21) and roof pressure seat (22), bending die utensil (21) set up in frame (1), roof pressure seat (22) fixed connection is in the top push end of pushing mechanism (3), sliding connection in the frame is held in roof pressure seat (22), bending groove (221) that are used for confirming the radius of bending are seted up in roof pressure seat (22), bending die utensil (21) are located pushing mechanism (3) and push the motion path of holding, bending die utensil (21) are located the vertical projection in bending groove (221), just the center of bending die utensil (21) is located a straight line with the center in bending groove (221).

2. A bender according to claim 1, wherein: the pushing mechanism (3) comprises a hydraulic cylinder (31) and two pushing rods (32), the hydraulic cylinder (31) is fixedly connected to the base (1), the two pushing rods (32) are hinged to piston rods of the hydraulic cylinder (31), one pushing rod (32) is hinged to the base (1) at the same time, the other pushing rod (32) is hinged to the jacking seat (22) at the same time, and the rotating planes of the two pushing rods (32) relative to the hydraulic cylinder (31) are the same; and the sliding path of the jacking seat (22) relative to the frame is positioned in the rotating plane of the two jacking rods (32) relative to the hydraulic cylinder (31), and the pipe bending die (21) is positioned at one end of the machine base (1) far away from the jacking rods (32).

3. A bender according to claim 2, wherein: the two ejector push rods (32) are hinged to piston rods of the hydraulic cylinders (31) through bearing blocks (33), the bearing blocks (33) are hinged to the piston rods of the hydraulic cylinders (31), and the two ejector push rods (32) are hinged to the bearing blocks (33) simultaneously.

4. A bender according to claim 1, wherein: top pressure seat (22) slide through sliding (4) and connect in frame (1), sliding (4) include slide rail (41) and slider (42), slide rail (41) fixed connection is in frame (1), slide rail (41) are extended along the motion path that pushing mechanism (3) pushed away the end and are set up, slider (42) are rotated and are connected with a plurality of gyro wheels (421), and are a plurality of gyro wheel (421) roll connection is in slide rail (41), top pressure seat (22) fixed connection is in slider (42).

5. A bender according to claim 1, wherein: the bending groove (221) is provided with an adjusting piece (5) for adjusting the bending radius of the top pressing seat (22).

6. A bender according to claim 5, wherein: the utility model discloses a set up of bending groove (221) of top pressure seat (22) is along the direction of placing of pipeline, bending groove (221) two side openings opening border is provided with top pressure pole (222) respectively, bending groove (221) both sides border that the side opening is relative has all seted up a plurality of screws (223), and a plurality of screws (223) homogeneous phase on bending groove (221) two side borders that the side opening is relative sets up relatively, regulating part (5) include two bolts (51), two bolt (51) correspond respectively to wear to locate two screws (223) that bend groove (221) side opening is relative, and two bolt (51) insert simultaneously and establish and threaded connection in the both ends of top pressure pole (222).

7. A bender according to claim 6, wherein: the top pressure rod (222) is sleeved and rotationally connected with a sleeve (6).

8. A bender according to claim 1, wherein: elbow mould (21) set up in frame (1) through mount pad (7), mount pad (7) fixed connection in frame (1), mount pad (7) are U-shaped plate column structure, the equal fixedly connected with bead (71) of both sides inner wall that mount pad (7) are relative, draw-in groove (212) have all been seted up to the both sides lateral wall that elbow mould (21) kept away from mutually, elbow mould (21) are located the U-shaped opening of mount pad (7), two bead (71) correspond the card respectively and establish in two draw-in grooves (212), mount pad (7) are provided with locating part (8) that are used for restricting elbow mould (21) mount pad (7) that slides.

9. A bender according to claim 8, wherein: locating part (8) including rotate connect in stopper (81), fixed connection in stopper (82) and the spacing buckle (83) of fixed connection in mount pad (7) of stopper (81) of mount pad (7), the rotation plane of stopper (81) relative mount pad (7) covers in the roll-off route of bending die (21) relative mount pad (7), limiting rod (82) card is located in spacing buckle (83).

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