Material guiding frame device of pipe bending machine

Abstract

A material guiding frame device of a pipe bending machine is characterized by comprising a support, an overturning shaft, a first overturning frame, a first positioning air cylinder, a first overturning air cylinder, a first material guiding pipe and a first lengthening mechanism. The support comprises a left support and a right support, the two ends of the turnover shaft are rotationally supported by the left support and the right support respectively, the first turnover frame is installed on the turnover shaft, the two ends of the first turnover frame are installed at the two ends of the turnover shaft respectively, and the two ends of the first material guide pipe are fixed to the first turnover frame. A cylinder body of the first turnover cylinder is rotatably mounted on the left bracket or the right bracket, and a piston rod of the first turnover cylinder is rotatably connected with one end of the first turnover frame; the first lengthening mechanism comprises a first lengthening air cylinder, a second material guide pipe and a second material guide pipe fixing plate, the first lengthening air cylinder is installed on the first overturning frame, a piston rod of the first lengthening air cylinder is connected with the second material guide pipe fixing plate, the outer diameter of the second material guide pipe is smaller than the inner diameter of the first material guide pipe, and one end of the second material guide pipe is fixedly supported by the second material guide pipe fixing plate; and the other end enters the bending die through the first guide pipe.

Description

Technical Field

[0001] The utility model relates to a material guide rack device of a pipe bending machine. Background Art

[0002] The guide rack device is an important component of the long U-tube bending machine. When the bent metal tube reaches a certain length, the guide rack device must be installed between the bending die and the cutting device, so that the metal tube can be better guided into the bending die and the bending die can be assisted to complete the bending of the U tube. Due to the change in the length specification of the U tube, the guide rack device must also change accordingly, that is, the corresponding guide rack device must be replaced to better guide the metal tube into the bending die. This replacement and adjustment is very troublesome, requires high operator proficiency, is time-consuming and labor-intensive, and affects production efficiency. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a material guide rack device for a pipe bending machine, which has a simple structure and can adapt to workpieces of different lengths.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A material guide rack device for a pipe bending machine comprises a support, a turning shaft, a first turning rack, a first positioning cylinder, a first turning cylinder, a first material guide pipe, and a first extension mechanism;

[0006] The support comprises a left bracket and a right bracket, the two ends of the flip shaft are rotatably supported by the left bracket and the right bracket respectively, a first flip frame is mounted thereon, the two ends of the first flip frame are respectively mounted on the two ends of the flip shaft, the two ends of the first material guide pipe are fixed on the first flip frame, the cylinder body of the first flip cylinder is rotatably mounted on the left bracket or the right bracket, and the piston rod thereof is rotatably connected to one end of the first flip frame;

[0007] The first extension mechanism includes a first extension cylinder, a second material guide tube, and a second material guide tube fixing plate. The first extension cylinder is installed on the first turning frame, and its piston rod is connected to the second material guide tube fixing plate. The outer diameter of the second material guide tube is smaller than the inner diameter of the first material guide tube, one end of the second material guide tube is fixedly supported by the second material guide tube fixing plate, and the other end passes through the first material guide tube into the bending mold.

[0008] In order to ensure smooth rotation, an arc groove is provided on the left bracket or the right bracket on which the first flip cylinder is installed, and the rotating shaft is placed in the arc groove. The piston rod is rotatably connected to one end of the first flip frame through the rotating shaft. One end of the rotating shaft is rotatably connected to the piston rod, and the other end is fixed to the first flip frame. When the first flip frame rotates, the rotating shaft moves along the arc groove.

[0009] Preferably, the first positioning cylinder is installed on the right bracket or the left bracket, and is arranged opposite to the first flipping cylinder, and its piston rod can extend into or out of the positioning hole on the first flipping frame.

[0010] Preferably, the first material guide tube is installed on the first turning frame through the first material guide tube fixing plate, the first material guide tube fixing plate includes an upper fixing plate and a lower fixing plate, the upper fixing plate and the lower fixing plate are respectively provided with corresponding arc grooves, when the upper fixing plate is installed on the lower fixing plate, a circular hole is formed, the first material guide tube is placed in the circular hole, when the upper fixing plate is fixed together with the lower fixing plate and the first turning frame, the first material guide tube is fixed.

[0011] Preferably, a plurality of first material guiding tube fixing plates are arranged in the middle of the first material guiding tube, so as to be applicable to longer metal tubes.

[0012] When the metal tube is very short and the material guiding device is not needed, the piston rod of the first positioning cylinder withdraws from the positioning hole, and the piston rod of the first flipping cylinder extends, driving the first flipping frame to rotate downward to avoid the relevant parts of the pipe bending machine; when the material guiding device is needed, the piston rod of the first flipping cylinder retreats, and the first flipping frame is reset, and the piston rod of the first positioning cylinder extends into the positioning hole, so that the metal tube can pass through the first material guiding tube smoothly into the bending die and move forward, and then assist in completing the pipe bending action.

[0013] Preferably, a second extension mechanism is also provided, which includes a second flip frame, a third material guide pipe, a third material guide pipe fixing plate, a second flip cylinder and a second positioning cylinder, the second flip cylinder is installed on the second left bracket or the second right bracket, and its piston rod is connected to one end of the second flip frame, and the other end of the second flip frame is rotatably connected to the right bracket or the left bracket, the third material guide pipe is installed on the second flip frame through the third material guide pipe fixing plate, the third material guide pipe fixing plate includes a second upper fixing plate and a second lower fixing plate, the second upper fixing plate and the second lower fixing plate are respectively provided with corresponding arc grooves, when the second upper fixing plate is installed on the second lower fixing plate, a second circular hole is formed, and the third material guide pipe is placed in the second circular hole, and when the second fixing plate is fixed together with the second lower fixing plate and the second flip frame, the third material guide pipe is fixed.

[0014] The second positioning cylinder is installed on the second right bracket or the second left bracket, and is arranged opposite to the second flipping cylinder. Its piston rod can extend into or out of the second positioning hole on the second flipping frame. The piston rod of the second positioning cylinder is out of the second positioning hole. The second flipping frame can be rotated downward 180 degrees by the drive of the second flipping cylinder to avoid related components or reset the second flipping frame. The piston rod of the second positioning cylinder extends into the second positioning hole to lengthen the third material guide pipe.

[0015] Preferably, the third extension mechanism includes a second extension cylinder, a fourth material guide tube, and a fourth material guide tube fixing plate. The second extension cylinder is installed on the second turning frame, and its piston rod is connected to the fourth material guide tube fixing plate. The outer diameter of the fourth material guide tube is smaller than the inner diameter of the third material guide tube, one end of the fourth material guide tube is fixedly supported by the fourth material guide tube fixing plate, and the other end extends into the third material guide tube, so that the metal tube can pass through the fourth material guide tube and enter the bending mold through the third material guide tube; the extension and retraction of the piston rod of the second extension cylinder drives the fourth material guide tube fixing plate to move back and forth, and when the piston rod is extended, it can adapt to metal tubes with longer specifications.

[0016] Compared with the prior art, the utility model has the advantages of: adopting a material guide rack device composed of a plurality of extension mechanisms, conveniently completing the automatic adjustment of workpieces of different lengths, having a simple structure and convenient adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a material guide rack device of a pipe bending machine according to an embodiment of the utility model.

[0018] Figure 2 It is a top view of a material guide rack device of a pipe bending machine in one state according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, a material guide rack device of a pipe bending machine includes a support, a turning shaft 2, a first turning rack 3, a first positioning cylinder 30, a first turning cylinder 4, a first material guide pipe 50, a first lengthening mechanism, a second lengthening mechanism and a third lengthening mechanism.

[0021] The support includes a left support 101 and a right support 102, which are connected to a bending die (not shown in the figure), so that the rotation of the bending die will drive the support 1 to rotate together, and assist in completing the U-tube bending. The two ends of the flip shaft 2 are rotatably supported by the left support 101 and the right support 102, respectively, and a first flip frame 3 is installed thereon. The two ends of the first flip frame 3 are respectively installed on the two ends of the flip shaft 2, located between the left support 101 and the right support 102, and the two ends of the first material guide pipe 50 are fixed on the first flip frame 3. The cylinder body of the first flip cylinder 4 is rotatably installed on the left support 101 (or the right support 102), and its piston rod is rotatably connected to one end of the first flip frame 3. In this embodiment, the piston rod is rotatably connected to one end of the rotating shaft 401, and the other end of the rotating shaft 401 is fixed to the first flip frame 3.

[0022] In order to ensure smooth rotation, an arc groove 1011 is provided on the left bracket 101 (right bracket 102 ) on which the first turning cylinder 4 is installed. The rotating shaft 401 is located in the arc groove 1011 . When the first turning bracket 3 rotates, the rotating shaft 401 moves along the arc groove 1011 .

[0023] The first positioning cylinder 30 is installed on the right bracket 102 (or the left bracket 101 ) and is arranged opposite to the first flipping cylinder 4 . The piston rod of the first positioning cylinder 30 can extend into or out of the positioning hole 304 on the first flipping frame 3 .

[0024] There are multiple first material guide tubes 50, so that multiple U-tubes can be processed at one time. The first material guide tube 50 can be installed on the first turning frame 3 through the first material guide tube fixing plate. The first material guide tube fixing plate includes an upper fixing plate 301 and a lower fixing plate 302. The upper fixing plate 301 and the lower fixing plate 302 are respectively provided with corresponding arc grooves, so that when the upper fixing plate 301 is installed on the lower fixing plate 302, a circular hole 303 is formed, and the first material guide tube 50 is placed in the circular hole 303. When the upper fixing plate 301 is tightened with screws to fix it together with the lower fixing plate 302 and the first turning frame 3, the first material guide tube 50 is fixed.

[0025] Generally, there are two material guide tube fixing plates, which are located at both ends of the first material guide tube 50 . If the metal tube to be processed is longer, several first material guide tube fixing plates can also be arranged in the middle of the first material guide tube 50 .

[0026] When the metal tube is very short and the material guiding device is not needed, the piston rod of the first positioning cylinder 30 withdraws from the positioning hole 304, and the piston rod of the first turning cylinder 4 extends, driving the first turning frame 3 to rotate downward to avoid the relevant parts of the tube bending machine; when the material guiding device is needed, the piston rod of the first turning cylinder 4 retracts, and the first turning frame 3 is reset, and the piston rod of the first positioning cylinder 30 extends into the positioning hole 304, so that the metal tube can pass through the first material guiding tube 50 smoothly into the bending die and move forward, and then assist in completing the tube bending action.

[0027] The first extension mechanism includes a first extension cylinder 501, a second material guide tube 502, and a second material guide tube fixing plate 503. The first extension cylinder 501 is installed on the first turning frame 3, and its piston rod is connected to the second material guide tube fixing plate 503. The outer diameter of the second material guide tube 502 is smaller than the inner diameter of the first material guide tube 50. One end of the second material guide tube 502 is fixed and supported by the second material guide tube fixing plate 503, which is the same as the fixing method of the first material guide tube 50. The other end extends into the first material guide tube 50 and can move in the first material guide tube 50, so that the metal pipe can pass through the second material guide tube 502 and enter the bending mold through the first material guide tube 50. The expansion and contraction of the piston rod of the first extension cylinder 501 drives the second material guide tube fixing plate 503 to move back and forth. When the piston rod is extended, it can adapt to metal pipes of longer specifications.

[0028] The second extension mechanism includes a second flip frame 601, a third material guide tube 602, a third material guide tube fixing plate 603, a flip cylinder 604 and a second positioning cylinder 60. The flip cylinder 604 is installed on the left bracket 101 (right bracket 102), and its piston rod is connected to one end of the second flip frame 601. The other end of the second flip frame 601 is rotatably connected to the right bracket 102 (left bracket 101). The connection method of the third material guide tube 602 to the second flip frame 601 and the third material guide tube fixing plate 603 is the same as that of the first material guide tube 50 to the first The connection mode of the turning frame 3 and the first material guide tube fixing plate is the same. The third material guide tube 602 is installed on the second turning frame 601 through the third material guide tube fixing plate 603. The third material guide tube fixing plate 603 includes a second upper fixing plate and a second lower fixing plate. The second upper fixing plate and the second lower fixing plate are respectively provided with corresponding arc grooves. When the second upper fixing plate is installed on the second lower fixing plate, a second circular hole is formed. The third material guide tube is placed in the second circular hole. When the second fixing plate is fixed together with the second lower fixing plate and the second turning frame, the third material guide tube is fixed. The second positioning cylinder 60 is installed on the right bracket 102 (left bracket 101) and is arranged opposite to the turning cylinder 604. Its piston rod can extend into or out of the positioning hole 6011 on the second turning frame 601.

[0029] The piston rod of the second positioning cylinder 60 withdraws from the positioning hole 6011, and the second flip frame 601 can be rotated 180 degrees downward by the drive of the flip cylinder 604 to avoid related components or reset the second flip frame 601. The piston rod of the second positioning cylinder 60 extends into the positioning hole 6011 to lengthen the third material guide tube 602.

[0030] The third extension mechanism includes a second extension cylinder 701, a fourth material guide tube 702, and a fourth material guide tube fixing plate 703. The second extension cylinder 701 is installed on the second turning frame 601, and its piston rod is connected to the fourth material guide tube fixing plate 703. The outer diameter of the fourth material guide tube 702 is smaller than the inner diameter of the third material guide tube 602. One end of the fourth material guide tube 702 is fixedly supported by the fourth material guide tube fixing plate 703, and the other end extends into the third material guide tube 602, so that the metal pipe can pass through the fourth material guide tube 702 and enter the bending mold through the third material guide tube 602. The extension and retraction of the piston rod of the second extension cylinder 701 drives the fourth material guide tube fixing plate 703 to move back and forth. When the piston rod is extended, it can adapt to metal pipes of longer specifications.

[0031] like Figure 2As shown, this is the state when the longest metal tube can be bent, the piston rods of the second extension cylinder 701 and the first extension cylinder 501 are both extended, the piston rod of the first positioning cylinder 30 is extended into the positioning hole 304, and the piston rod of the second positioning cylinder 60 is extended into the positioning hole 6011, so as to prevent the first flip frame 3 and the second flip frame 601 from rotating during the tube bending process.

Claims

1. A material guide rack device for a pipe bending machine, characterized in that: It includes a support, a turning axis, a first turning frame, a first positioning cylinder, a first turning cylinder, a first material guide pipe, and a first extension mechanism; the support includes a left support and a right support, the two ends of the turning axis are rotatably supported by the left support and the right support respectively, and the first turning frame is installed thereon, the two ends of the first turning frame are respectively installed on the two ends of the turning axis, the two ends of the first material guide pipe are fixed on the first turning frame, the cylinder body of the first turning cylinder is rotatably installed on the left support or the right support, and its piston rod is rotatably connected to one end of the first turning frame; the first extension mechanism includes a first extension cylinder, a second material guide pipe, and a second material guide pipe fixing plate, the first extension cylinder is installed on the first turning frame, its piston rod is connected to the second material guide pipe fixing plate, the outer diameter of the second material guide pipe is smaller than the inner diameter of the first material guide pipe, one end of the second material guide pipe is fixedly supported by the second material guide pipe fixing plate, and the other end enters the bending mold through the first material guide pipe.

2. The guide rack device of the pipe bending machine according to claim 1, characterized in that: An arc groove is provided on the left bracket or the right bracket on which the first flip cylinder is installed, and the rotating shaft is placed in the arc groove. The piston rod is rotatably connected to one end of the first flip frame through the rotating shaft. One end of the rotating shaft is rotatably connected to the piston rod, and the other end is fixed to the first flip frame. When the first flip frame rotates, the rotating shaft moves along the arc groove.

3. The guide rack device of the pipe bending machine according to claim 2, characterized in that: The first positioning cylinder is installed on the right bracket or the left bracket and is arranged opposite to the first flipping cylinder. Its piston rod can extend into or out of the positioning hole on the first flipping bracket.

4. The guide rack device of the pipe bending machine according to claim 1, characterized in that: The first material guide tube is installed on the first turning frame through the first material guide tube fixing plate. The first material guide tube fixing plate includes an upper fixing plate and a lower fixing plate. The upper fixing plate and the lower fixing plate are respectively provided with corresponding arc grooves. When the upper fixing plate is installed on the lower fixing plate, a circular hole is formed. The first material guide tube is placed in the circular hole. When the upper fixing plate is fixed together with the lower fixing plate and the first turning frame, the first material guide tube is fixed.

5. The guide rack device for a pipe bender according to claim 1, characterized in that: A plurality of first material guiding tube fixing plates are arranged in the middle of the first material guiding tube.

6. The guide rack device for a pipe bending machine according to claim 1, characterized in that: A second extension mechanism is also provided, which includes a second flip frame, a third material guide pipe, a third material guide pipe fixing plate, a second flip cylinder and a second positioning cylinder. The second flip cylinder is installed on the second left bracket or the second right bracket, and its piston rod is connected to one end of the second flip frame. The other end of the second flip frame is rotatably connected to the right bracket or the left bracket. The third material guide pipe is installed on the second flip frame through the third material guide pipe fixing plate. The third material guide pipe fixing plate includes a second upper fixing plate and a second lower fixing plate. The second upper fixing plate and the second lower fixing plate are respectively provided with corresponding arc grooves. When the second upper fixing plate is installed on the second lower fixing plate, a second circular hole is formed. The third material guide pipe is placed in the second circular hole. When the second fixing plate is fixed together with the second lower fixing plate and the second flip frame, the third material guide pipe is fixed.

7. The guide rack device of the pipe bending machine according to claim 6, characterized in that: The second positioning cylinder is installed on the second right bracket or the second left bracket and is arranged opposite to the second flipping cylinder. Its piston rod can extend into or withdraw from the second positioning hole on the second flipping frame. The piston rod of the second positioning cylinder withdraws from the second positioning hole. Driven by the second flipping cylinder, the second flipping frame can be rotated downward 180 degrees to avoid related components or reset the second flipping frame, and the piston rod of the second positioning cylinder extends into the second positioning hole.

8. The guide rack device of the pipe bending machine according to claim 6, characterized in that: It also includes a third extension mechanism, which includes a second extension cylinder, a fourth material guide pipe, and a fourth material guide pipe fixing plate. The second extension cylinder is installed on the second turning frame, and its piston rod is connected to the fourth material guide pipe fixing plate. The outer diameter of the fourth material guide pipe is smaller than the inner diameter of the third material guide pipe, one end of the fourth material guide pipe is fixedly supported by the fourth material guide pipe fixing plate, and the other end extends into the third material guide pipe, so that the metal pipe can pass through the fourth material guide pipe and enter the bending mold through the third material guide pipe; the extension and retraction of the piston rod of the second extension cylinder drives the fourth material guide pipe fixing plate to move back and forth, and when the piston rod is extended, it can adapt to metal pipes with longer specifications.

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