CN205463761U - Double -headed tube bender - Google Patents

Abstract

The utility model discloses a double-head pipe bending machine in the field of pipe bending machines, which comprises: a frame, on which a guide rail is arranged, and on the guide rail is provided with two left and right bases, at least one base can move left and right along the guide rail Move; two machine bases are respectively equipped with a pipe bending mechanism, the structure of the two pipe bending mechanisms is the same and symmetrical. The driving mechanism and the pipe bending arm, the main shaft is equipped with a rotary mold shaft, and the rotary mold shaft and the main shaft are connected by bearings. The mold driving mechanism and the slide rail, the slide rail is provided with a slider, the two sides of the slider are respectively connected with the mold clamping drive mechanism and the mold clamping adjustment assembly, and the mold clamping adjustment assembly is connected with the clamping mold; the two bending pipe forming mechanisms can respectively The two positions to be bent are bent. The utility model has the advantages of being able to bend two positions of the pipe material into shape only by clamping once.

Description

Double-head pipe bender

technical field

The utility model relates to a pipe bending machine for bending and forming pipe materials.

Background technique

The pipe bender is a processing equipment for bending and forming pipes. At present, a single-head pipe bender is often used. The structure of the single-head pipe bender includes: a worktable, a spindle is movable in the workbench, and the spindle is set in a vertical direction. The upper end of the main shaft is provided with a bent pipe arm, the outer fixed sleeve of the main shaft is provided with a main transmission gear, and the main transmission gear is meshed with a main driving gear, which is installed on the output shaft of the main motor. Driven by the main motor, the main shaft can rotate and drive the pipe bending arm to rotate. A rotary mold shaft is arranged inside the main shaft, the upper and lower ends of the rotary mold shaft protrude from the main shaft, the upper end of the rotary mold shaft is provided with a wheel mold, the wheel mold is provided with a wheel mold cavity, and the lower end of the rotary mold shaft is provided with a pull-off sleeve. Die transmission gear, the demoulding drive gear is meshed with the demoulding driving gear, and the demoulding driving gear is installed on the output rotating shaft of the demoulding motor. The rotary mold shaft and the main shaft are connected by bearings, so that the rotary mold shaft and the main shaft can rotate independently without mutual interference. Driven by the demoulding motor, the rotary mold shaft can rotate and only drive the wheel mold to rotate without It will drive the elbow arm to rotate. An oil cylinder is fixedly installed on the elbow arm, and the outer end of the piston rod of the oil cylinder is fixedly connected with the clamping mold, and the clamping mold cavity matching the wheel mold is arranged on the clamping mold. After the oil cylinder is started, the piston rod of the oil cylinder can drive the clamping mold to move back and forth in the horizontal direction so that the clamping mold and the wheel mold are clamped and closed or separated from each other.

When working, the operator needs to stand in front of the workbench, hold the pipe to be bent and make the appropriate part of the pipe to be bent lean against the wheel mold cavity on the wheel mold, and then start the oil cylinder, and the piston rod of the oil cylinder pushes the mold to clamp The mold and the wheel mold are molded together, so that the position of the pipe to be bent is clamped in the wheel mold cavity and the clamp mold cavity. Then, start the main motor, the main motor drives the main shaft to rotate to drive the pipe bending arm to rotate synchronously, at this time, the clamping mold rotates around the wheel mold to bend the pipe to be bent. When the pipe to be bent is bent to a suitable angle, start the oil cylinder in reverse, and the piston rod of the oil cylinder separates the clamping mold and the wheel mold from each other to loosen the pipe. At this time, the bent pipe will be buckled in the wheel mold cavity, and it is difficult for the pipe to come out of the wheel mold cavity only by manpower, so the demoulding motor must be started, and the demoulding motor will drive the wheel mold to rotate to make the buckle in the wheel mold cavity The pipe in the mold is demoulded.

The single-head pipe bending machine with the above structure has the following disadvantages: 1. After the pipe is accurately clamped each time, only one position of the pipe to be bent can be bent. If you want to bend the two ends of the pipe or want to To bend the two ends of the pipe into mutually symmetrical shapes, the pipe needs to be accurately clamped for the first time, and after the pipe is bent at the first position to be bent, the pipe is demoulded and removed Pipe, and restore the wheel mold, clamping mold and pipe bending arm, etc., and then carry out the second accurate clamping of the pipe, and then the pipe bending can be performed on the second position of the pipe to be bent. It can be seen that using the single-head pipe bending machine with the above structure to bend the two ends of the same pipe is very cumbersome and the production efficiency is low; 2. The wheel mold cavity and the clamp mold cavity are horizontal in the left and right directions Relatively set, so that the pipe to be bent cannot be naturally placed in the wheel mold cavity or the clamp mold cavity under the action of its own gravity, so before the clamping mold and the wheel mold are clamped and closed, the operator needs to hold the pipe to be bent And make the side of the pipe to be bent lean against the wheel mold cavity, so as to ensure that when the clamping mold and the wheel mold are closed, the pipe to be bent can be clamped in the wheel mold cavity and the clamp mold cavity, which leads to the deformation of the pipe The clamping operation is more complicated. In addition, since it needs to be held by the operator when clamping the pipes to be bent, it is not suitable to set up multiple pairs of cavities on the clamping mold and the wheel mold, that is, the above-mentioned traditional single-head pipe bending machine is inconvenient for multiple pipes at the same time. Bending molding, which leads to low production efficiency; 3. The clamping mold is directly connected to the piston rod of the oil cylinder. When the clamping mold and the wheel mold are clamped together, the piston rod needs to bear a large force, which is easy to use during actual use. result in damage to the piston rod. In addition, the moving distance of the clamping mold is completely determined by the telescopic distance of the piston rod of the oil cylinder. When it is necessary to process some pipes with larger diameters, the length of the piston rod can only be lengthened, but this also makes the piston rod easier to damage. Increased maintenance costs; 3. During the use of the oil in the oil cylinder, the temperature of the oil will inevitably rise and the volume of the oil will expand. In the case of cold weather in winter, the temperature of the oil will decrease and cause The shrinkage of the oil volume will lead to errors in the moving distance of the clamping mold when closing the mold, and it is easy to cause the clamping mold to be too tight or too loose. If the clamping mold is too tight, it will cause damage to the clamping mold and the wheel mold. If it is too loose, the pipe cannot be clamped, which will affect the quality of the bend.

Utility model content

The technical problem to be solved by the utility model is: to provide a double-head pipe bender that can bend both ends of the pipe with only one clamping. At the same time, the double-head pipe bender can also clamp Hold the pipe to be bent, adjust the installation position of the clamping mold to ensure accurate clamping position, and effectively reduce the force on the cylinder piston rod during mold clamping.

In order to solve the above problems, the technical solution adopted by the utility model is: a double-head pipe bending machine, including: a frame, a guide rail is arranged on the frame, and two left and right supports are also arranged along the guide rail on the frame, and At least one frame can move left and right along the guide rail so as to change the distance between the two frames, and a control positioning mechanism capable of controlling and positioning the frame on the frame is provided between the frame that can move left and right and the frame ; A pipe bend forming mechanism is respectively arranged on the left and right machine bases. The left and right pipe bend forming mechanisms have the same structure and are arranged symmetrically on the left and right. The specific structure of each pipe bend forming mechanism includes: The main shaft is movably supported in the machine base, the main shaft is set in the horizontal direction, the main driving mechanism is arranged on the main shaft, and the pipe bending arm is arranged at the front end of the main shaft. Under the action of the main driving mechanism, the main shaft can rotate around its own central axis to drive the pipe bending The arm rotates synchronously. A rotary mold shaft coaxial with the main shaft is arranged inside the main shaft. The front and rear ends of the rotary mold shaft extend out of the main shaft. The rotary mold shaft and the main shaft are connected to each other through bearings. , there is an upper cavity on the wheel mold, a clamping mold matching the wheel mold is set under the wheel mold, a lower cavity corresponding to the upper cavity is set on the clamping mold, and a demoulding mold is set at the rear end of the rotary mold shaft. Drive mechanism, under the action of the demoulding drive mechanism, the rotary mold shaft can rotate around its own central axis to drive the wheel mold to rotate synchronously; the mold clamping drive mechanism and slide rails are arranged on the elbow arm, and the slide rails are provided with The slider moves back and forth on the slide rail. One side of the slider is connected to the clamping drive mechanism. The other side of the slider is provided with a mold clamping adjustment assembly for adjusting the distance between the clamping mold and the wheel mold. The mold clamping adjustment assembly is connected to the clamping mold. connected with each other, starting the clamping drive mechanism can drive the slider to move back and forth along the slide rail so that the clamping mold and the wheel mold are clamped and clamped or separated from each other; the wheel mold and the clamping mold in the left and right elbow forming mechanisms can The two positions to be bent on the same pipe are clamped respectively, so that the left and right bending forming mechanisms can respectively perform bending and forming processing on the two positions to be bent of the pipe.

Further, the aforementioned double-headed pipe bender, wherein: the main drive mechanism includes: a large gear fixedly sleeved on the main shaft, and a matched pipe bending rack is provided on the large gear, and the pipe bending rack The end is connected with the piston rod of the main oil cylinder. The main oil cylinder is arranged in the machine base. The main oil cylinder can rotate the large gear by dragging the bent pipe rack to drive the main shaft to rotate synchronously.

Further, the aforementioned double-head pipe bender, wherein: the demoulding drive mechanism includes: a pinion fixedly sleeved on the rear end of the rotary mold shaft, and a matching rotary mold rack is provided on the pinion, and the rotary mold The tail end of the rack is connected with the piston rod of the rotary mold cylinder, which is set in the machine base, and the rotary mold cylinder can drive the pinion to rotate through the rotary mold rack, thereby driving the rotary mold shaft to rotate synchronously, thereby driving the wheel mold synchronously rotate.

Further, the aforementioned double-head pipe bender, wherein: the specific structure of the mold clamping drive mechanism includes: a mold clamping cylinder fixedly installed on the pipe bending arm, a connecting rod mechanism is arranged on the piston rod of the mold clamping cylinder, connected The rod mechanism is connected with the slider, and the mold clamping cylinder can drive the slider to move back and forth along the slide rail through the linkage mechanism so that the clamping mold and the wheel mold are clamped and closed or separated from each other.

Further, the aforementioned double-head pipe bender, wherein: the specific structure of the linkage mechanism includes: a two-hole plate and a three-hole plate connected to each other, the two-hole plate is strip-shaped, and the three-hole plate of the three-hole plate Each corner is provided with a through hole: one hole, two holes, and three holes respectively. One end of the two-hole plate is hinged with the slider, the other end of the two-hole plate is hinged with one hole of the three-hole plate, and the three-hole plate is hinged. It is hinged on the elbow arm through the second hole, and the three-hole plate is also hinged with the end of the piston rod through the three holes. The hole rotates and pushes the two-hole plate outward through the first hole, so that the bottom of the two-hole plate approaches the slider, and at the same time, the upper part of the two-hole plate pushes the slider upward to move together, so that the clamping mold moves closer to the wheel mold , until the bottom of the two-hole plate abuts against the inner side of the slider and cannot continue to rotate, the clamping mold and the wheel mold are just clamped to each other.

Further, the aforementioned double-head pipe bender, wherein: the specific structure of the mold clamping adjustment assembly includes: a mold sleeve installed on the slider, a mold sleeve groove is arranged in the mold sleeve, and the clamping mold is installed on the mold In the sleeve, and the clamping mold can move along the groove of the mold sleeve during the bending process, a return spring is arranged between the clamping mold and the mold sleeve, and the return spring can make the clamping mold sliding along the groove of the mold sleeve under the action of external force lose the external force Return to the original position after action, the slider is provided with a slider groove, the mold sleeve is arranged in the slider groove in a cooperative manner, the mold sleeve can move along the slider groove to approach or stay away from the wheel mold, and the bottom of the mold sleeve is provided. An adjusting screw that rotates but cannot be displaced axially with the mold sleeve. The adjusting support is fixed on the slider. The nut that locks the adjusting screw on the adjusting support.

Furthermore, in the aforementioned double-headed pipe bending machine, an auxiliary clamping mechanism for clamping pipes is respectively provided in the left and right two pipe bending forming mechanisms, and the structures of the left and right auxiliary clamping mechanisms The same and left-right symmetrical arrangement.

Further, the aforementioned double-headed pipe bender, wherein: each auxiliary clamping mechanism includes: a clamping frame fixed at the front end of the machine base, the clamping frame is provided with a clamping mold base, and the upper and lower ends of the clamping mold base are Clamping upper die and clamping oil cylinder are fixed respectively, and clamping lower die is arranged on the piston rod of clamping oil cylinder. Or separated from each other, the clamping upper mold is provided with an upper clamping groove, and the clamping lower mold is provided with a lower clamping groove; when the driving action of the clamping oil cylinder makes the clamping lower mold and the clamping upper mold clamp and close each other, The clamping groove formed by clamping the lower clamping groove on the lower mold and the upper clamping groove on the upper mold and the lower cavity of the clamping mold and the upper cavity of the wheel mold when clamping each other Cavities are aligned.

Further, the aforementioned double-head pipe bender, wherein: the control and positioning mechanism includes: a large pallet installed on the guide rail, a flexible frame is provided at the bottom of the large pallet, and a ball screw is provided in the frame. It is installed on the ball screw through thread fit, and the machine base is fixedly installed on the large carriage. The rotating ball screw can drive the large carriage to move back and forth along the guide rail flexibly, and the large carriage can be fixed after the ball screw is stopped. Do not move.

Furthermore, in the aforementioned double-head pipe bender, a scale is provided on the guide rail, and the scale can be used to measure the distance between the left and right machine bases.

The beneficial effects of the utility model are as follows: 1. The left and right bending pipe forming mechanisms are provided, and only one clamping is required to bend and shape the two positions of the pipe to be bent. It is necessary to restore the wheel mold, clamping mold and pipe bending arm, etc., and to carry out the second accurate clamping of the pipe, so that the production efficiency can be effectively improved. Moreover, if the two ends of the pipe need to be bent into mutually symmetrical shapes, it is only necessary to keep the shapes and sizes of the wheel molds and clamping molds in the left and right pipe bending mechanisms consistent, which is very convenient; The upper cavity of the mold and the lower cavity of the clamping mold are set opposite to each other, so the pipe to be bent can be naturally placed in the lower cavity of the clamping mold without falling off, and the operator does not need to hold the pipe when clamping it. The operation is very convenient for bending pipes; moreover, since there is no need for manual holding when clamping pipes, it is possible to set up multiple pairs of clamping cavities on the wheel mold and clamping mold according to production requirements, so that multiple pipes can be clamped at the same time. Bending pipe forming can greatly improve work efficiency; 3. An auxiliary clamping mechanism is provided to prevent the pipe from moving during the bending forming process, which can further ensure the forming quality of the pipe; 4. Through the two-hole plate and three-hole plate The transmission function of the connecting rod of the plate, on the one hand, effectively reduces the force that the piston rod needs to bear during the mold clamping process, and on the other hand, it can shorten the length of the piston rod. These all make the piston rod more durable, thereby reducing the maintenance cost of the piston rod and prolonging the service life of the product; 5. It is possible to eliminate the hydraulic fluid volume of the clamping die by adjusting the initial distance between the clamping die and the wheel die. The deviation of the moving distance in the event of a change ensures that the clamping die and the wheel die can be clamped accurately to clamp the pipe, so as to further ensure the quality of the pipe bend.

Description of drawings

Fig. 1 is a schematic structural view of a double-head pipe bender described in the present invention.

Fig. 2 is a schematic diagram of the cross-sectional structure of A-A in Fig. 1 .

Fig. 3 is a schematic diagram of the state after the clamping die and the wheel die are separated in Fig. 2 .

Fig. 4 is a schematic diagram of the installation structure between the mold casing and the slider of the right-bend pipe forming mechanism in Fig. 1 .

Fig. 5 is a structural schematic diagram of the rear view direction of the right bent pipe forming mechanism and machine base in Fig. 1 .

detailed description

The technical scheme described in the utility model will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the double-head pipe bending machine includes: a frame 25, a guide rail 26 is arranged on the frame 25, and a left and a right two machines are also arranged on the frame 25 along the guide rail 26. Base 15, the left base 15 is fixedly installed on the frame 25 by bolts 39, and the right base 15 can move left and right along the guide rail 26 so as to change the distance between the two bases 15. Moreover, between the right frame 15 and the frame 25, a control positioning mechanism 34 capable of controlling and positioning the frame 15 on the frame 25 is provided. In this embodiment, the control and positioning mechanism 34 includes: a large carriage 341 movably sleeved on the guide rail 26, a flexible 342 is arranged at the bottom of the large carriage 341, a ball screw 343 is arranged in the frame 25, and a movable The spirit 342 is arranged on the ball screw 343 through thread fit, and the other end of the ball screw 343 stretches out from the frame 25 and is connected with the handle 344. Drive the large carriage 341 to move back and forth along the guide rail 26 through the flexible 342, and the large carriage 341 can remain fixed after the ball screw 343 is stopped, so that the right frame 15 is fixed at the current position of the frame 25 superior. In this embodiment, a scale 38 is provided on the guide rail 26 , and the scale 38 can be used to measure the distance between the left and right bases 15 .

As shown in Fig. 1, Fig. 2 and Fig. 3, a pipe bending mechanism 1 is respectively arranged on the left and right machine bases 15. Symmetrical setting. The structure of the elbow forming mechanism 1 on the right is described below as an example. The specific structure of the elbow forming mechanism 1 on the right includes: a main shaft 16 is movably supported in the machine base 15 on the right, and the main shaft 16 is arranged in a horizontal direction. A main drive mechanism 2 is arranged on the main shaft 16, and a pipe bend arm 11 is provided at the front end of the main shaft 16. Under the action of the main drive mechanism 2, the main shaft 16 can rotate around its central axis so as to drive the pipe bend arm 11 to rotate synchronously. In this embodiment, the main driving mechanism 2 includes: a large gear 21 fixedly sleeved on the main shaft 16, and a matching curved pipe rack 22 is provided on the large gear 21, and the back of the curved pipe rack 22 is covered The large rack press seat 23 installed in the right frame 15 is compressed, and the large rack press seat 23 can ensure the tight fit between the large gear 21 and the curved pipe rack 22, and the end of the curved pipe tooth rack 22 and the main The piston rod 241 of the oil cylinder 24 is connected, and the main oil cylinder 24 is fixedly installed in the support 15 on the right side. The main oil cylinder 24 can rotate the large gear 21 by dragging the elbow rack 22 to drive the main shaft 16 to rotate synchronously.

As shown in Fig. 2 and Fig. 3, a rotary mold shaft 17 coaxial with the main shaft 16 is movably arranged in the main shaft 16, and the front and rear ends of the rotary mold shaft 17 stretch out respectively from the front and rear ends of the main shaft 16, and the rotary mold shaft 17 It is connected with the main shaft 16 through bearings, so that the rotary mold shaft 17 and the main shaft 16 can rotate independently without interfering with each other. The bearing adopted between the rotary mold shaft 17 and the main shaft 16 is a polymer material bearing, specifically a copper graphite bearing, and the copper graphite bearing is a kind of oil-free lubricating bearing, so that the rotary mold shaft 17 and the main shaft 16 can be closely matched , without interfering with each other.

As shown in Figure 1, Figure 2 and Figure 3, the front end of the rotary mold shaft 17 is provided with a wheel mold 5, and the wheel mold 5 is fixedly installed on the front end of the rotary mold shaft 17 through a cap 18, so that the wheel mold 5 can follow the rotation of the rotary mold shaft 17 without loosening. Two upper cavities 51 are arranged at intervals on the wheel mold 5, and a clamping mold 6 matched with the wheel mold 5 is arranged below the wheel mold 5, and two upper mold cavities 51 correspondingly matched with the two upper mold cavities 51 are arranged on the clamping mold 6. A lower cavity 61, the mold rotating shaft 17 rear end is provided with a demoulding drive mechanism 3, under the effect of the demoulding driving mechanism 3, the mold rotating shaft 17 can rotate around its central axis so as to drive the wheel mold 5 to rotate synchronously. As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, in this embodiment, the demoulding drive mechanism 3 includes: a pinion 31 fixedly sleeved on the rear end of the rotary mold shaft 17, and the pinion 31 engages A matching rotary mold rack 32 is provided, and the back side of the rotary mold rack 32 is pressed by the pinion rack press seat 33 installed in the right frame 15, and the pinion rack press seat 33 can ensure that the pinion 31 and the Rotating mold rack 32 closely fit. The tail end of the rotary mold rack 32 is connected with the piston rod 351 of the rotary mold cylinder 35, and the rotary mold cylinder 35 is fixedly installed in the right frame 15, and the rotary mold cylinder 35 can drive the pinion 31 to rotate through the rotary mold rack 32 Thereby drive mold rotating shaft 17 to rotate synchronously, thereby drive wheel mold 5 to rotate synchronously.

As shown in Fig. 2 and Fig. 3, a mold clamping drive mechanism 7 and a slide rail are arranged on the elbow arm 11, and a slide block 13 capable of moving back and forth along the slide rail is arranged in the slide rail, and one side of the slide block 13 is connected with the mold clamping rail. The driving mechanism 7 is connected, and the other side of the slider 13 is provided with a mold clamping adjustment assembly 9 for adjusting the distance between the clamp mold 6 and the wheel mold 5. The mold clamping adjustment assembly 9 is connected with the clamp mold 6, and the mold clamping drive is started. The mechanism 7 can drive the slider 13 to move back and forth along the slide rail so that the clamping die 6 and the wheel die 5 are clamped and clamped to each other or separated from each other. The mold cavity 61 and the two upper mold cavities 51 of the wheel mold 5 can respectively be butted with each other to form two clamping mold cavities, thereby completing mold clamping.

As shown in Figures 2 and 3, in this embodiment, the specific structure of the clamping drive mechanism 7 includes: a clamping cylinder 74 fixedly installed on the elbow arm 11, and a piston rod 741 of the clamping cylinder 74 A link mechanism 71 is provided, and the link mechanism 71 is connected with the slider 13. The mold clamping cylinder 74 can drive the slider 13 to move back and forth along the slide rail through the link mechanism 71 so that the clamping mold 6 and the wheel mold 5 are clamped and closed. die or separate from each other. In this embodiment, the specific structure of the linkage mechanism 71 includes: a two-hole plate 72 and a three-hole plate 73 connected to each other, the two-hole plate 72 is in the shape of a strip, and the three-hole plate 73 is in a triangular shape and Each of the three corners is provided with a through hole: respectively one hole 731, two holes 732, and three holes 733. The first hole 731 is hinged to each other, the three-hole plate 73 is hinged on the elbow arm 11 through the second hole 732 , and the three-hole plate 73 is also hinged to the end of the piston rod 741 through the three holes 733 . The piston rod 741 of the clamping cylinder 74 can make the slider 13 move back and forth in the slide rail of the elbow arm 11 through the connecting rod transmission of the three-hole plate 73 and the two-hole plate 72, so that the lower cavity 61 of the clamping mold 6 The upper cavity 51 of the wheel mold 5 is closed and docked with each other or separated from each other, and the specific process of closing and docking them to complete the mold clamping is: when the piston rod 741 of the clamping cylinder 74 pushes the three holes 733 of the three-hole plate 73 upwards , the three-hole plate 73 rotates around the second hole 732, and pushes the second-hole plate 72 outward through the first hole 731, so that the bottom of the second-hole plate 72 approaches the slider 13, and the top of the second-hole plate 72 pushes upward Move together with slide block 13, thereby clamp mold 6 approaches wheel mold 5, until the bottom of two-orifice plate 72 abuts against slide block 13 inner side and can't continue to rotate, clamp mold 6 just and wheel mold 5 are mutually clamped.

As shown in Fig. 2, Fig. 3 and Fig. 4, in this embodiment, the specific structure of the mold clamping adjustment assembly 9 includes: a mold case 91 installed on the slider 13, and a mold case is arranged in the mold case 91 Groove 92, the clamping die 6 is installed in the mold cover 91, and the clamping die 6 can move along the die cover groove 92 during the pipe bending process, and a return spring 99 is arranged between the clamping die 6 and the die cover 91, and the return spring 99 can make the mold clamp 6 sliding along the mold sleeve groove 92 under the action of external force return to its original position after losing the external force. Considering the smooth movement of the clamp mold 6, two roller shafts 93 are embedded in the mold sleeve 91. The root roller shaft 93 is respectively provided with rollers 94, and the bottom of the clamping mold 6 is in contact with the two rollers 94 in the mold sleeve 91, so that the sliding resistance of the clamping mold 6 in the mold sleeve groove 92 can be reduced when the pipe is bent. . The slider 13 is provided with a slider groove 131, and the mold cover 91 is cooperatively arranged in the slider groove 131. The mold cover 91 can move along the slider groove 131 so as to approach or stay away from the wheel mold 5. The bottom of the mold cover 91 is provided with The adjusting screw 95 that can rotate freely but cannot axially displace with the mold cover 91, the adjusting support 96 is fixed on the slide block 13, and the lower end of the adjusting screw 95 is connected to the threaded through hole in the adjusting support 96 through thread fit. A nut 97 capable of locking the adjusting screw 95 on the adjusting support 96 is also arranged on the adjusting screw 95 . In actual use, the installation position of the mold cover 91 fixed on the slider 13 can be flexibly adjusted according to the volume change of the hydraulic oil affected by the temperature, thereby adjusting the lower cavity 61 of the clamping mold 6 and the upper mold of the wheel mold 5 The initial distance between the cavities 51 is to eliminate the deviation caused by the moving distance of the clamping mold 6 when the hydraulic oil volume changes, thereby improving the mold clamping accuracy.

As shown in Figure 1, the wheel dies 5 and the clamping dies 6 in the left and right bending pipe forming mechanisms 1 can respectively hold two positions to be bent on the same pipe, so that the left and right The two bending pipe forming mechanisms 1 can respectively carry out bending and forming processing on the two pipe bending positions of the pipe material. In this embodiment, the left and right elbow forming mechanisms 1 are respectively provided with an auxiliary clamping mechanism 8 for clamping pipe materials, and the left and right auxiliary clamping mechanisms 8 are identical and symmetrically arranged. . The structure of the auxiliary clamping mechanism 8 on the right is described below as an example. In this embodiment, the auxiliary clamping mechanism 8 on the right includes: a clamping frame 81 fixed to the front end of the right frame 15, and the clamping frame 81 is provided with a clamping mold base 82, the upper and lower ends of the clamping mold base 82 are respectively fixed with a clamping upper mold 83 and a clamping oil cylinder 84, and the piston rod 841 of the clamping oil cylinder 84 is provided with a clamping lower Die 85, under the driving action of clamping oil cylinder 84, clamping lower die 85 and clamping upper die 83 can be clamped and matched or separated from each other. Upper clamping groove is arranged on clamping upper die 83, and clamping lower die 85 is provided with a lower clamping groove; when the driving action of the clamping oil cylinder 84 makes the clamping lower die 85 and the clamping upper die 83 mutually clamped and matched, the lower clamping groove on the clamped lower die 85 and the clamped upper die The clamping groove formed by the upper clamping groove on the 83 is aligned with the clamping cavity formed by the lower cavity 61 on the clamping mold 6 and the upper cavity 51 on the wheel mold 5 when clamping and clamping each other. That is to say, when the pipe is bent and formed, the pipe can be clamped in the clamping cavity and the clamping groove of the left and right bending forming mechanisms 1 at the same time, which can ensure that only one clamping can be Bending both ends of the pipe. Moreover, when the clamping molds 6 of the left and right bending pipe forming mechanisms 1 rotate around the corresponding wheel molds 5 respectively, so as to bend and shape the two pipes to be bent, the two auxiliary clamping mechanisms 8 The pipe can be co-clamped to prevent displacement of the pipe, which can further ensure the forming quality of the pipe.

The following is a detailed description of the method of bending and forming the two positions of the pipe to be bent by the double-head pipe bender described in the present invention.

First, adjust the distance between the left and right bases 15 according to the distance between the two positions of the pipe to be bent. The spirit 342 drives the large carriage 341 to move on the guide rail 26, so that the right frame 15 approaches or moves away from the left frame 15. When the handle 344 is turned, the real-time distance between the left and right bases 15 can be accurately observed according to the scale 38 on the guide rail 26 until the distance between the left and right bases 15 meets the design requirements. Stop rotating the handle 344, so that the right frame 15 is controlled to be positioned at the current position of the frame 25. In this way, it can be ensured that in the following operation process, the two pipe bending positions of the pipe can be accurately clamped respectively in the clamping cavities of the left and right pipe bending forming mechanisms 1 .

After adjusting the distance between the left and right machine bases 15, the two pipes to be bent can be placed in the two lower cavities 61 of the clamping mold 6 in the left and right bending forming mechanisms 1 at the same time , and then start the mold clamping cylinder 74 of the mold clamping drive mechanism 7 in the left and right two elbow forming mechanisms 1, so that the two positions of the two pipes to be bent are respectively clamped in the left and right two elbow forming In the two clamping cavities of mechanism 1.

Next, start the clamping oil cylinder 84 in the left and right auxiliary clamping mechanisms 8, the piston rod 841 of the clamping oil cylinder 84 pushes up the clamping lower die 85, and the clamping lower die 85 gradually moves towards the clamping upper die 83. Close until two pipes are clamped in the two clamping grooves of the two auxiliary clamping mechanisms 8 at the same time. The two auxiliary clamping mechanisms 8 jointly clamp and fix the pipe to be bent to prevent the pipe from moving during the bending process, which can further ensure the forming quality of the pipe. Then start the main oil cylinder 24 in the left and right two elbow forming mechanisms 1, the main oil cylinder 24 makes the large gear 21 rotate forward by pushing the elbow rack 22 to drive the main shaft 4 forward, so that the elbow arm 11 rotates. At the same time, the clamping molds 6 in the two elbow forming mechanisms 1 rotate around the corresponding wheel molds 5 respectively until the two pipe bending positions of the two pipes are respectively bent into predetermined shapes. During the above-mentioned bending forming process, the clamping mold 6 will slide outward along the groove 92 of the mold sleeve due to friction and extrusion between the wheel mold 5 and the pipe material.

After the two positions of the two pipes to be bent are respectively bent into predetermined shapes, the mold clamping cylinders 74 in the left and right elbow forming mechanisms 1 are activated in reverse, and the piston rod 741 of the mold clamping cylinders 74 is recovered, so that The clamping mold 6 is separated from the wheel mold 5, and now the two bent parts of the two pipes are respectively buckled in the upper cavity 51 of the wheel mold 5 in the left and right bending pipe forming mechanisms 1; in addition, the clamping mold 6 Owing to being no longer subjected to the friction extrusion effect, so can return to original position under the effect of back-moving spring 99; By pulling the rotary mold rack 32 to reverse the pinion 31 and thereby drive the rotary mold shaft 17 to reverse, so that the wheel mold 5 is reversed, so that the two bent pipes on the pipe are buckled in the upper cavity 51 of the wheel mold 5 The part falls off naturally, which is convenient for the operator to take the pipe, and the pipe bending process is ended.

The double-head pipe bending machine described in the utility model has the following advantages: 1. Two bending pipe forming mechanisms, left and right, are provided, and only one clamping is needed to bend and shape the two pipes to be bent. It saves the need to restore the wheel mold, clamping mold and pipe bending arm after the first pipe bending, and the need to carry out the second accurate clamping of the pipe, so that the production efficiency can be effectively improved. Moreover, if the two ends of the pipe need to be bent into mutually symmetrical shapes, it is only necessary to keep the shapes and sizes of the wheel molds and clamping molds in the left and right pipe bending mechanisms consistent, which is very convenient; The upper cavity of the mold and the lower cavity of the clamping mold are set opposite to each other, so the pipe to be bent can be naturally placed in the lower cavity of the clamping mold without falling off, and the operator does not need to hold the pipe when clamping it. The operation is very convenient for bending pipes; moreover, since there is no need for manual holding when clamping pipes, it is possible to set up multiple pairs of clamping cavities on the wheel mold and clamping mold according to production requirements, so that multiple pipes can be clamped at the same time. Bending pipe forming can greatly improve work efficiency; 3. An auxiliary clamping mechanism is provided to prevent the pipe from moving during the bending forming process, which can further ensure the forming quality of the pipe; 4. Through the two-hole plate and three-hole plate The transmission function of the connecting rod of the plate, on the one hand, effectively reduces the force that the piston rod needs to bear during the mold clamping process, and on the other hand, it can shorten the length of the piston rod. These all make the piston rod more durable, thereby reducing the maintenance cost of the piston rod and prolonging the service life of the product; 5. It is possible to eliminate the hydraulic fluid volume of the clamping die by adjusting the initial distance between the clamping die and the wheel die. The deviation of the moving distance in the event of a change ensures that the clamping die and the wheel die can be clamped accurately to clamp the pipe, so as to further ensure the quality of the pipe bend.

Claims (10)

1. double-headed tube bender, including: frame, it is characterized in that: in frame, be provided with guide rail, it is additionally provided with left and right two supports along guide rail in frame, and at least one support can move left and right along guide rail thus change the distance between two supports, between the support that can move left and right and frame, it is provided with the control detent mechanism that this support can be controlled be positioned in frame；nullOn a left side、It is respectively arranged with a forming elbow mechanism on right two supports，Left、The structure of You Liangge forming elbow mechanism is identical and in a left side、The right side is symmetrical arranged，The concrete structure of each forming elbow mechanism includes: in support, expansion bearing has main shaft，Main shaft is horizontally arranged，Main driving mechanism it is provided with on main shaft，Front-end of spindle is provided with bending pipe arm，Under the effect of main driving mechanism，Main shaft can rotate around its center axis thus drive bending pipe arm synchronous rotary，The revolving die axle with main shaft concentric it is provided with in main shaft，Before and after revolving die axle, main shaft is all stretched out at two ends，It is connected with each other by bearing between revolving die axle and main shaft，Revolving die axle front end is provided with wheel mould，It is provided with upper impression on wheel mould，It is provided with below wheel mould and takes turns the clamping that mould matches，The lower impressions of cooperation corresponding with upper impression it is provided with in clamping，Revolving die shaft rear end is provided with demoulding drive mechanism，Under the effect of demoulding drive mechanism，Revolving die axle can rotate thus driven wheel mould synchronous rotary around its center axis；Bending pipe arm is provided with matched moulds drive mechanism and slide rail; slide rail is provided with the slide block that can move back and forth along slide rail; slide block side is connected with matched moulds drive mechanism; the opposite side of slide block is provided with for regulating the matched moulds adjusting part of spacing between clamping and wheel mould; matched moulds adjusting part is connected with clamping, starts matched moulds drive mechanism energy band movable slider and moves back and forth along slide rail so that clamping mutually clamps matched moulds with wheel mould or is separated from each other；Can clamp respectively on same tubing two of wheel mould in left and right Liang Ge forming elbow mechanism and clamping treat bend pipe position, so that left and right Liang Ge forming elbow mechanism to this tubing two can treat that bend pipe position is curved processing and forming respectively.

Double-headed tube bender the most according to claim 1, it is characterized in that: described main driving mechanism includes: fixed cover is located at the gear wheel on main shaft, on gear wheel, engagement is provided with the bend pipe tooth bar matched, the end of bend pipe tooth bar is connected with the piston rod of master cylinder, master cylinder is arranged in support, and master cylinder can make bull gear drive by dragging bend pipe tooth bar thus drive main shaft synchronous rotary.

Double-headed tube bender the most according to claim 1, it is characterized in that: described demoulding drive mechanism includes: fixed cover is located at the little gear of revolving die shaft rear end, on little gear, engagement is provided with the revolving die tooth bar matched, the tail end of revolving die tooth bar is connected with the piston rod of revolving die oil cylinder, revolving die oil cylinder is arranged in support, revolving die oil cylinder can be rotated by the little gear of revolving die rack drives thus drive revolving die axle synchronous rotary, thus driven wheel mould synchronous rotary.

4. according to the double-headed tube bender described in claim 1 or 2 or 3; it is characterized in that: the concrete structure of described matched moulds drive mechanism includes: the die cylinder being fixedly installed on bending pipe arm; it is provided with linkage on the piston rod of die cylinder; linkage is connected with slide block, and die cylinder can be moved back and forth along slide rail by linkage band movable slider so that clamping mutually clamps matched moulds with wheel mould or is separated from each other.

nullDouble-headed tube bender the most according to claim 4，It is characterized in that: the concrete structure of described linkage includes: interconnective two orifice plates and three orifice plates，Described two orifice plates are strip，A through hole it is each provided with: be respectively a hole in described three orifice plate shapes triangular in shape and three angles、Two holes、Three holes，One end of two orifice plates is hinged with slide block，The other end of two orifice plates and a hole of three orifice plates are hinged，Three orifice plates are hinged on bending pipe arm by two holes，Three orifice plates are hinged also by the termination in three holes with piston rod，When three hole of piston rod upwards pushing tow three orifice plate of die cylinder，Three orifice plates rotate around two holes、And by hole outside pushing tow two orifice plate，Make the bottom of two orifice plates towards slide block near while，The top of two orifice plates upwards pushing tow slide block and is moved together，So that clamping is close to wheel mould，Until the bottom of two orifice plates is resisted against when cannot be rotated further inside slide block，Clamping mutually clamps with wheel mould just.

null6. according to the double-headed tube bender described in claim 1 or 2 or 3，It is characterized in that: the concrete structure of described matched moulds adjusting part includes: the die sleeve being installed on slide block，Die sleeve is provided with die sleeve groove，Described clamping is installed in die sleeve，And clamping can be moved along die sleeve groove during bend pipe，It is provided with back-moving spring between described clamping and die sleeve，Back-moving spring can make the clamping homing after losing External Force Acting slided under external force along die sleeve groove，It is provided with slide block slot on described slide block，Die sleeve is cooperatively disposed in slide block slot，Die sleeve can move along slide block slot thus closer or far from wheel mould，Be provided with bottom die sleeve can rotate freely but can not with die sleeve occur axial displacement adjusting screw rod，Regulation bearing is fixed on slide block，The lower end of adjusting screw rod is connected to regulate in the tapped through hole in bearing by threaded engagement，Adjusting screw rod is additionally provided with the nut being locked at by adjusting screw rod on regulation bearing.

7. according to the double-headed tube bender described in claim 1 or 2 or 3, it is characterized in that: left and right Liang Ge forming elbow mechanism is also respectively provided with one for the auxiliary clamping device clamping tubing, the structure of left and right two auxiliary clamping devices is identical and symmetrical setting.

Double-headed tube bender the most according to claim 7; it is characterized in that: each auxiliary clamping device includes: be fixed on the clamping support of support front end; trip holder it is provided with on clamping support; the two ends up and down of trip holder are fixedly installed clamping upper mold and clamping cylinder respectively; clamping lower mold it is provided with on the piston rod of clamping cylinder; under the effect of clamping cylinder; clamping lower mold can mutually clamp matched moulds with clamping upper mold or be separated from each other; it is provided with upper fastening groove in clamping upper mold, clamping lower mold is provided with lower fastening groove；When the driving effect of clamping cylinder makes clamping lower mold and clamping upper mold mutually clamps matched moulds, the lower impressions of the clamping when holding tank that the lower fastening groove in clamping lower mold and the upper fastening groove in clamping upper mold are formed and mutually clamping matched moulds and take turns the clamping die cavity that the upper impression of mould formed and align.

9. according to the double-headed tube bender described in claim 1 or 2 or 3, it is characterized in that: described control detent mechanism includes: the saddle being arranged on guide rail, spirit of living it is provided with bottom saddle, frame is provided with ball-screw, threaded engagement of having quick access to information alive is arranged on ball-screw, support is fixedly mounted on saddle, and rotation ball leading screw can drive saddle to move back and forth along guide rail by spirit of living, and after the ball-screw that stops operating, saddle then can maintain static.

10. according to the double-headed tube bender described in claim 1 or 2 or 3, it is characterised in that: being provided with rule on guide rail, rule can be used for measuring the distance between left and right two supports.