CN105903792B - Composite pipe bender - Google Patents

Abstract

The invention discloses a composite pipe bender, which comprises a rack and an electric control box, wherein the rack is respectively provided with: the manipulator device is used for transferring the electric heating tube to a tube bending station for bending the tube end and transferring the bent electric heating tube to a tube bending station; the pipe folding device mainly comprises two pipe folding machine heads, and the pipe folding machine heads can bend the pipe ends of the electric heating pipes; and the pipe bending device is used for rotationally forming the electric heating pipe subjected to bending processing by using a bending die to form a preset shape. The compound pipe bender can simultaneously complete pipe end bending and main body forming processing of the electric heating pipe in the same equipment, saves production time, improves production efficiency, adopts a mechanical hand device to transfer the electric heating pipe, has high automation degree, basically does not need special staff to watch, can save manpower, and reduces production cost. And the bending die hole is utilized to position the electric heating tube, so that the consistency of a processed finished product can be ensured, and the yield of the finished product is greatly improved.

Description

Composite pipe bender

technical field

The invention relates to electric heating tube processing and forming equipment, in particular to a composite pipe bending machine.

Background technique

Electric heating tubes are ubiquitous in our lives, such as electric heating tubes in soymilk machines, electric heating tubes in rice cookers, electric heating tubes in water heaters, and so on.

In order to adapt to the internal shape of different heater shells, the electric heating tube is often bent into different shapes. With the development of the tube processing industry, the shape of the electric heating tube is becoming more and more complex, and the requirements for the bending degree and shape of the electric heating tube are becoming more and more diverse, and the corresponding bending equipment also needs to be continuously updated.

In the prior art, there are two types of devices for bending electric heating tubes: manual and semi-automatic. The manual electric heating tube bending device is generally used to manually place the electric heating tube in the bending device and fix it on the bending table by means of hinged joints. And the manual bending tool that can rotate on the bending table presses the electric heating tube into the fixed block on the bending table that matches the manual bending tool, and then rotates with the hinge point of the manual bending tool and the bending table as the fulcrum Manual bending tool to bend the electric heating tube into a certain shape.

The working principle of the semi-automatic electric heating tube bending device is: use the bending plate or bending block controlled by the cylinder to bend the electric heating tube placed at the corresponding position, instead of manual operation.

The processing steps of the electric heating tube in the rice cooker are shown in Figure 1. The straight electric heating tube L1 is first bent to form the bent electric heating tube L2, and then the ring-shaped electric heating tube L3 is formed by bending. The existing equipment for processing electric heating tubes in electric rice cookers can only perform one bending step, and cannot completely form the electric heating tubes. The next bending machine is still needed to bend the electric heating tubes again, which wastes production time and reduces production efficiency. , and each bending machine still needs personnel to guard and place and take the electric heating tube, which wastes human resources.

Moreover, since the electric heating tube in the electric rice cooker is an annular electric heating tube L3, its main body is annular, but its two ends are folded at a certain angle, the three-dimensional structure of the entire annular electric heating tube L3 is relatively complicated, the processing is difficult, and the yield rate of the finished product is difficult ensure.

Contents of the invention

The object of the present invention is to provide a compound pipe bending machine.

According to one aspect of the present invention, a compound pipe bending machine is provided, including a frame and an electrical control box, and the frame is respectively equipped with:

The manipulator device is used to transfer the electric heating tube to the tube bending station for tube end bending processing and transfer the bent electric heating tube to the tube bending station for tube bending processing;

The tube folding device is mainly composed of two tube folding heads. The two tube folding heads are fixed to the frame through the slide rail device. The tube folding head can hold the two ends of the electric heating tube and rotate, so that the electric heating tube can be adjusted. Pipe end bending processing;

The pipe bending device is located at the downstream station of the pipe bending device. The pipe bending device has a rotatable bending die. The manipulator device transfers the bent electric heating tube from the pipe bending device to the pipe bending device. After the bending process, the electric heating tube is rotated into a predetermined shape.

The composite pipe bending machine adopting the above technical scheme can complete the pipe end bending and main body forming processing of the electric heating tube at the same time in the same equipment, which saves production time and improves production efficiency. The transfer of electric heating tubes has a high degree of automation and basically does not require special personnel to guard, which can save labor and thus reduce production costs.

In some embodiments, the manipulator device is fixedly connected to the frame through a slide rail device. The manipulator device includes a first manipulator, a second manipulator, and a cylinder group that drives the first manipulator and the second manipulator to move back and forth along the slide rail device. The first manipulator It is used to transfer the electric heating tube to the bending device, the second manipulator is used to transfer the bent electric heating tube to the bending device, the first manipulator is connected with the first lifting drive cylinder, and the first lifting drive cylinder is used to drive The first manipulator moves up and down, the second manipulator is connected with the second main lift drive cylinder and the second auxiliary lift drive cylinder, the second main lift drive cylinder and the second auxiliary lift drive cylinder are connected in series, and are respectively used to drive the second The manipulator moves up and down. In each processing stroke, the second manipulator first grips the bent electric heating tube and transfers it to the pipe bending device, and the first manipulator grips and places the electric heating tube on the processing position of the pipe bending device. The first manipulator can grip the electric heating tube from the material storage device, and can also grip the electric heating tube from the discharge side of other processing equipment such as the pipe end shrinking forming machine.

In some embodiments, the cylinder group includes a first slide drive cylinder, a second main slide drive cylinder and a second auxiliary slide drive cylinder, the first slide drive cylinder is used to drive the first manipulator to move back and forth along the slide rail device, and the second main slide drive cylinder The sliding driving cylinder and the second pair of sliding driving cylinders are connected in series, and are respectively used to drive the second manipulator to move back and forth along the slide rail device.

In some embodiments, the pipe folding head includes a pipe folding cylinder, a pipe folding rack and a pipe folding main shaft. There are swing arms and bending blocks on the gears and the main shaft of the folding tube respectively. The pressing blocks and the pressing block cylinder are installed on the swing arm. The pressing block cylinder is used to drive the pressing blocks close to or away from the bending block. The bending block and the pressure block are pressed and fixed, and the pipe folding cylinder drives the pipe folding spindle to rotate a certain angle through the pipe folding rack and the pipe folding gear, and then bends the end of the electric heating tube.

In some embodiments, tube crimping devices are respectively provided inside the tube crimping head, and the tube crimping devices include a tube crimping cylinder and a pinch wheel arranged on the telescopic shaft of the tube crimping cylinder. The pinch wheel can rotate freely, and the tube crimping cylinder drives The pressure roller compresses the electric heating tube. Thereby, the bending angle of the pipe end bending process can be made more precise.

In some embodiments, one pipe bending head is provided with a tube loosening cylinder, and the other pipe bending head is provided with a servo cylinder. When the pipe bending head starts to bend the pipe end, the servo cylinder drives the The pipe folding head moves to the middle along the slide rail device. When the pipe end bending process is completed, the tube loosening cylinder drives the connected pipe folding head to move to the middle along the slide rail device. The servo cylinder drives the pipe bending head to move to the middle along the slide rail device, which can avoid the thinning or deformation of the pipe wall caused by the pulling force formed by the electric heating pipe during the bending process of the pipe end. After the processing is completed, the tube loosening cylinder drives the tube bending machine head to move to the middle along the slide rail device, so that the two ends of the electric heating tube can leave the bending processing position, which is convenient for the manipulator to pick up.

In some embodiments, the pipe bending device includes a pipe bending cylinder, a pipe bending rack, a pipe bending main shaft and a bending die, the pipe bending rack is connected to the pipe bending cylinder, and the bending pipe main shaft is provided with a Bending gear, the bending die is fixed on the main shaft of the bending die, the bending die is provided with a bending die hole, the bending die hole matches the outer diameter of the electric heating tube, the head end of the electric heating tube after bending is inserted into the bending die hole and fixed , The bending cylinder drives the bending main shaft to rotate through the bending rack and the bending gear, the bending die rotates with the bending die main shaft, and the electric heating tube inserted into the bending die hole rotates around the bending die to form. The bending die hole can position the electric heating tube, which can ensure the consistency of the finished product and greatly improve the yield of the finished product.

In some embodiments, the pipe bending device is also provided with a pipe crimping device. The pipe crimping device includes a pipe crimping cylinder and a pinch wheel arranged on the telescopic shaft of the tube crimping cylinder. The pinch wheel can rotate freely, and the tube crimping cylinder drives the pinch wheel along the The direction of rotation of the bending die compresses the electric heating tube on the bending die.

In some embodiments, the pipe bending device is also provided with a compression cylinder, the compression cylinder is fixed on a slidable support, the support is connected to a support cylinder, and a compression block is installed on the telescopic shaft of the compression cylinder. The compression cylinder is used to drive the compression block to approach or move away from the bending die along the axial direction of the bending die main shaft, and the support cylinder is used to drive the support to move up and down, so that the compression block moves away from or close to the bending die along the up and down direction.

In some embodiments, an adjustment device for adjusting the position of the bending die device is also included, and the adjustment device includes a horizontal handwheel and a longitudinal handwheel. The adjustment device can adjust the position of the bending die device through the horizontal handwheel and the longitudinal handwheel, so that the bending die hole of the bending die is facing the head end of the bent electric heating tube, so that it can be inserted into the bending die hole.

Description of drawings

Fig. 1 is a schematic diagram of the processing steps of the electric heating tube in the electric rice cooker.

Fig. 2 is a schematic view of the front structure of a compound pipe bending machine according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the rear structure of the compound pipe bender shown in Fig. 2 .

FIG. 4 is an enlarged view of the portion indicated by A in FIG. 3 .

Fig. 5 is an assembly diagram of the compound pipe bending machine shown in Fig. 2 .

FIG. 6 is a schematic structural diagram of the manipulator device shown in FIG. 5 .

Fig. 7 is a schematic structural view of the tube folding device shown in Fig. 5 .

FIG. 8 is a schematic structural view of the pipe bending device shown in FIG. 5 .

Fig. 9 is a schematic diagram of the internal structure of the pipe bending device shown in Fig. 8 .

Fig. 10 is a schematic diagram of the installation of the compression cylinder shown in Fig. 8 .

FIG. 11 is an enlarged view of the portion indicated by B in FIG. 10 .

Figure 12 is a schematic structural view of the bending die.

Fig. 13 is a state view of the electric heating tube formed by the bending die shown in Fig. 12 .

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

2 to 13 schematically show a compound pipe bender according to an embodiment of the present invention. As shown in the figure, the device includes a frame 1 and an electrical control box. The frame 1 is respectively provided with a manipulator device 2, a pipe bending device 3 and a pipe bending device 4.

Among them, the manipulator device 2 is fixedly connected to the frame 1 through the slide rail device 8, and is used to transfer the electric heating tube L1 to the tube bending station for bending processing of the tube end and transfer the bent electric heating tube L2 to the pipe bender. bit for pipe bending.

The manipulator device 2 includes a first manipulator 21 , a second manipulator 22 , and a cylinder group that drives the first manipulator 21 and the second manipulator 22 to move back and forth along the slide rail device 8 .

Both the first manipulator 21 and the second manipulator 22 are provided with a buffer 7 on the outside of the stroke.

The first manipulator 21 is used to transfer the electric heating tube L1 to the tube folding device 2 .

The second manipulator 22 is used to transfer the bent electric heating tube L2 to the tube bending device 4 .

The first manipulator 21 is connected with the first lift driving cylinder 23 . The first lift driving cylinder 23 is used to drive the first manipulator 21 to move up and down.

When clamping the electric heating tube L1, firstly, the clamping hand of the first manipulator 21 is opened and moved downward to be in place; then the clamping hand is closed to clamp the electric heating tube L1; finally, the first manipulator 21 moves upward.

The first manipulator 21 can grip the electric heating tube L1 from the material storage device, and can also grip the electric heating tube L1 from the discharge side of other processing equipment such as a pipe end necking forming machine.

The second manipulator 22 is connected with the second main lifting driving cylinder 25 and the second auxiliary lifting driving cylinder 24 .

The second main lifting driving cylinder 25 and the second auxiliary lifting driving cylinder 24 are connected in series, and can respectively drive the second manipulator 22 to move up and down a stroke.

In each processing stroke, the second manipulator 22 first clamps the bent electric heating tube L2 and then transfers it to the tube bending device 4 . The first manipulator 21 clamps and places the electric heating tube L1 on the processing position of the tube folding device 3 .

When clamping the bent electric heating tube L2, firstly, the gripper of the first manipulator 22 is opened, and the second main lifting drive cylinder 2 drives it to move downward into position; then the gripper is closed to grip the bent electrothermal tube Electric heating tube L2; finally, the second main lifting drive cylinder 2 drives the first manipulator 21 to move upward.

The cylinder group of the manipulator 2 includes a first slide drive cylinder 26 , a second main slide drive cylinder 27 and a second auxiliary slide drive cylinder 28 .

The first sliding drive cylinder 27 is used to drive the first manipulator 21 to move back and forth along the slide rail device 8 . The second master slide drive cylinder 27 and the second auxiliary slide drive cylinder 28 are connected in series, and can respectively drive the second manipulator 22 to move a stroke along the slide rail device 8 .

The tube folding device 3 is mainly composed of two tube folding heads 31 . Two pipe folding heads 31 are fixed with the frame by the slide rail device 8 . The tube bending machine head 31 can hold and rotate both ends of the electric heating tube L1 , so as to perform tube end bending processing on the electric heating tube L1 .

Wherein, the pipe folding head 31 includes a pipe folding oil cylinder 311 , a pipe folding rack 312 and a pipe folding main shaft 314 .

The pipe folding rack 312 is connected with the pipe folding oil cylinder 311.

A tube folding gear 313 matched with the tube folding rack 312 is arranged outside the tube folding main shaft 314 .

A swing arm 318 and a bending block 315 are respectively provided on the pipe folding main shaft 314 .

A briquetting block 316 and a briquetting block cylinder 317 are installed on the swing arm 318 . The pressing block cylinder 317 is used to drive the pressing block 316 close to or away from the bending block 315 .

During tube bending processing, the electric heating tube L1 is placed between the bending block 315 and the pressing block 316 and is compressed and fixed by the pressing block cylinder 317 . The tube folding cylinder 311 drives the tube folding spindle 314 to rotate at a certain angle through the tube folding rack 312 and the tube folding gear 313, and then bends the end of the electric heating tube L1 to form the bent electric heating tube L2.

In this embodiment, tube crimping devices 5 are respectively provided inside the tube creasing head 31 .

The tube crimping device 5 includes a tube crimping cylinder 51 and a crimping wheel 52 arranged on the telescopic shaft of the tube crimping cylinder 51 . The pinch wheel 52 is free to rotate. The pressure tube cylinder 51 drives the pressure wheel 52 to compress the electric heating tube L1. Thereby, the bending angle of the pipe end bending process can be made more precise. Moreover, the pressing wheel 52 can roll along the outer wall of the electric heating tube L1 during the bending process, thereby avoiding damage to the outer wall of the electric heating tube L1 .

Among the two pipe crimping heads 31 , the pipe crimping head 31 on the right is provided with a loosening cylinder 32 , and the other pipe crimping head 31 on the left is provided with a follower cylinder 33 .

When the pipe bending head 31 starts to bend the pipe end, the follower cylinder 33 drives the left pipe bending head 31 to move to the middle along the slide rail device 8, thereby avoiding the bending process of the electric heating tube L1 at the pipe end The tube wall is thinned or deformed due to the tension formed during the process.

After the processing is completed, the tube loosening cylinder 32 drives the tube bending head 31 on the right side to move to the middle along the slide rail device, so that the two ends of the electric heating tube can be left from the bending processing position, which is convenient for the first manipulator 21 to grip.

The pipe bending device 4 is located at the downstream station of the pipe bending device 3 .

The pipe bending device 4 has a rotatable bending die 44 . The second manipulator 22 transfers the bent electric heating tube L2 from the tube bending device 3 to the tube bending device 4 . The pipe bending device 4 uses the bending die 44 to rotate the bent electric heating tube L2 into a predetermined shape of the electric heating tube L3.

The pipe bending device 4 includes a pipe bending cylinder 41 , a pipe bending rack 42 , a pipe bending main shaft 431 and a bending die 44 .

Wherein, the bent pipe rack 42 is connected with the bent pipe oil cylinder 41 .

A pipe bending gear 43 matching the pipe bending rack 42 is arranged outside the pipe bending main shaft 431 .

The bending die 44 is fixed on the pipe bending main shaft 431 .

The bending die 44 is provided with a bending die hole 441 . The bending die hole 441 matches the outer diameter of the electric heating tube.

After the bending process, the head end of the electric heating tube L2 is inserted into the bending die hole 441 and fixed. The bending pipe oil cylinder 41 drives the bending pipe main shaft 431 to rotate through the pipe bending rack 42 and the pipe bending gear 43. The bending die 44 follows the bending die main shaft 431 Rotating together, the electric heating tube inserted into the bending die hole 441 is rotated around the bending die 44 to form the electric heating tube L3 of a predetermined shape.

The bending die hole 441 can position the electric heating tube, can ensure the consistency of the finished product, and greatly improve the yield rate of the finished product.

In this embodiment, the pipe bending device 4 is also provided with a pipe crimping device 5 . The tube crimping device 5 includes a tube crimping cylinder 51 and a crimping wheel 52 arranged on the telescopic shaft of the tube crimping cylinder 51 . The pressing wheel 52 can rotate freely, and the pressing tube cylinder 51 drives the pressing wheel 52 to press the bent electric heating tube L2 on the bending die 44 along the rotation direction of the bending die 44 .

The pipe bending device 4 is also provided with a compression cylinder 47 .

Compression cylinder 47 is fixed on a slidable support 48. Support 48 is connected with a support cylinder 481.

A compression block 471 is installed on the telescopic shaft of compression cylinder 47.

The pressing cylinder 47 is used to drive the pressing block 471 to approach or move away from the bending die 4 along the axial direction of the bending die main shaft 431 . The support cylinder 481 is used to drive the support 48 to move up and down, so that the pressing block 471 moves away from or approaches the bending die 44 in the up and down direction.

As shown in FIG. 9 , the bending device 4 is also provided with a material stripping device, including a stripping cylinder 45 and a stripping plate 46 .

Wherein, the material return cylinder 45 is connected with a fixed plate 451, and its telescopic shaft passes through the fixed plate 451 and is connected with the material return plate 46 on the other side.

The bending die 44 is located outside the stripper plate 46 , and the bending pipe main shaft 431 passes through the fixing plate 451 . When the material stripping cylinder 45 drives the stripping plate 46 forward, the stripping plate 46 touches the tube end of the electric heating tube L3 of predetermined shape, and finally ejects the electric heating tube L3 of predetermined shape from the bending die hole 441 .

A conveyor belt 11 and a conveyor belt motor 12 are also provided on the frame 1 .

After the electric heating tube L3 of a predetermined shape is ejected from the bending die hole 441 , it is separated from the bending die 44 and naturally falls onto the conveyor belt 11 below.

In this embodiment, an adjusting device 6 for adjusting the position of the bending die device 4 is also included. The adjustment device 6 includes a transverse handwheel 61 and a longitudinal handwheel 62 . The adjusting device 6 can adjust the position of the bending die device 4 through the horizontal handwheel 61 and the longitudinal handwheel 62, so that the bending die hole 441 of the bending die 44 is facing the head end of the bent electric heating tube L2, so that it can be easily inserted into the bending die. Die holes 441 .

The composite pipe bending machine adopting the above technical scheme can simultaneously complete the pipe end bending and main body forming processing of the electric heating tube in the same equipment, which saves production time and improves production efficiency. To transfer the electric heating tube, the degree of automation is high, and there is basically no need for special personnel to guard it, which can save labor and thus reduce production costs. Moreover, it is beneficial for the bending die hole 441 to position the electric heating tube, which can ensure the consistency of the finished product and greatly improve the yield rate of the finished product.

What have been described above are only some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims (10)

1. Composite pipe bending machine, comprising a frame and an electrical control box, characterized in that, the frame is respectively equipped with: The manipulator device is used to transfer the electric heating tube to the tube bending station for tube end bending processing and transfer the bent electric heating tube to the tube bending station for tube bending processing; The tube folding device is mainly composed of two tube folding heads, the two tube folding heads are fixed to the frame through the slide rail device, and the tube folding heads can hold and rotate both ends of the electric heating tube , so that the end of the electric heating tube is bent; The tube bending device is located at the downstream station of the tube bending device, the tube bending device has a rotatable bending die, and the manipulator device transfers the bent electric heating tube from the tube bending device to the The pipe bending device uses the bending die to rotate the electric heating tube after the bending process into a predetermined shape. 2. The compound pipe bending machine according to claim 1, wherein the manipulator device is fixedly connected to the frame through a slide rail device, and the manipulator device includes a first manipulator, a second manipulator and drives the The cylinder group that the first manipulator and the second manipulator move back and forth along the slide rail device, the first manipulator is used to transfer the electric heating tube to the tube bending device, and the second manipulator is used to process the bending process After the electric heating tube is transferred to the bending device, the first manipulator is connected with the first lifting drive cylinder, and the first lift drive cylinder is used to drive the first manipulator to move up and down, and the second manipulator and the second The main lifting drive cylinder is connected with the second auxiliary lifting driving cylinder, and the second main lifting driving cylinder and the second auxiliary lifting driving cylinder are connected in series, and are respectively used to drive the second manipulator to move up and down. 3. The compound pipe bending machine according to claim 2, wherein the cylinder group comprises a first slide drive cylinder, a second main slide drive cylinder and a second auxiliary slide drive cylinder, and the first slide drive cylinder It is used to drive the first manipulator to move back and forth along the slide rail device, and the second main slide drive cylinder and the second auxiliary slide drive cylinder are connected in series, and are respectively used to drive the second manipulator along the slide rail device. The slide rail device moves back and forth. 4. The compound pipe bending machine according to claim 1, characterized in that, the pipe bending head includes a pipe folding cylinder, a pipe folding rack and a pipe folding spindle, and the pipe folding rack and the pipe folding cylinder connected, the outside of the pipe folding main shaft is provided with a pipe folding gear that matches the pipe folding rack, and the pipe folding main shaft is respectively provided with a swing arm and a bending block, and a pressing block and a pressing block are installed on the swing arm. A block cylinder, the briquetting cylinder is used to drive the briquetting block close to or away from the bending block, and the electric heating tube is placed between the bending block and the briquetting block and pressed and fixed during the tube folding process , the tube bending oil cylinder drives the tube bending spindle to rotate at a certain angle through the tube bending rack and the tube folding gear, and then performs tube end bending processing on the electric heating tube. 5. The composite pipe bending machine according to claim 1, characterized in that, the inner side of the pipe bending head is respectively provided with a pipe crimping device, and the pipe crimping device includes a crimping cylinder and a cylinder mounted on the crimping cylinder. The pressure wheel on the telescopic shaft can rotate freely, and the pressure tube cylinder drives the pressure wheel to compress the electric heating tube. 6. The compound pipe bending machine according to claim 1, characterized in that, one of the pipe bending heads is provided with a loose tube cylinder, and the other pipe bending head is provided with a follower cylinder, when the pipe bending machine When the head starts to bend the pipe end, the servo cylinder drives the pipe bending head connected to it to move to the middle along the slide rail device, and when the pipe end bending process is completed, the loose pipe cylinder Drive the pipe crimping head connected to it to move to the middle along the slide rail device. 7. The composite pipe bending machine according to claim 1, wherein the pipe bending device comprises a pipe bending cylinder, a pipe bending rack, a pipe bending main shaft and a bending die, and the pipe bending rack and the bending pipe connected to the pipe oil cylinder, the pipe bending main shaft is provided with a pipe bending gear that matches the pipe bending rack, the bending die is fixed on the pipe bending main shaft, and the bending die is provided with a bending die hole. The hole of the bending die matches the outer diameter of the electric heating tube, the head end of the bent electric heating tube is inserted into the hole of the bending die and fixed, and the oil cylinder of the bending pipe passes through the rack of the bending pipe and The pipe bending gear drives the pipe bending main shaft to rotate, the bending die rotates together with the bending die main shaft, and the electric heating tube inserted into the bending die hole rotates around the bending die to form. 8. The compound pipe bending machine according to claim 7, characterized in that, the pipe bending device is also provided with a pipe pressing device, and the pipe pressing device includes a pipe pressing cylinder and a telescopic shaft arranged on the pipe pressing cylinder The pressing wheel on the upper part can rotate freely, and the pressing tube cylinder drives the pressing wheel to press the electric heating tube on the bending die along the rotation direction of the bending die. 9. The composite pipe bending machine according to claim 7, characterized in that, the pipe bending device is also provided with a compression cylinder, and the compression cylinder is fixed on a slidable bracket, and the bracket is connected to a bracket The cylinders are connected, and a compression block is installed on the telescopic shaft of the compression cylinder, and the compression cylinder is used to drive the compression block to approach or move away from the bending die along the axial direction of the main axis of the bending die , the support cylinder is used to drive the support to move up and down, so that the pressing block moves away from or close to the bending die in the up and down direction. 10. The composite pipe bending machine according to claim 1, characterized in that it further comprises an adjustment device for adjusting the position of the bending die device, and the adjustment device includes a transverse handwheel and a longitudinal handwheel.