Automatic Pipe Bending and Punching Production Line

Abstract

The present invention relates to an automatic pipe bending and punching production line, which includes a machine base and a straight pipe storage rack. A processing path is formed on the machine base. On the processing path, there are successively arranged a straight pipe storage rack for storing straight pipes, a pipe bending mechanism for bending the straight pipes, and a punching mechanism for punching the bent pipes. Above the straight pipe storage rack, the pipe bending mechanism and the punching mechanism, a track is provided. On the track, between the straight pipe storage rack and the pipe bending mechanism, there is a straight pipe clamping trolley for clamping and moving the straight pipes. On the track, between the pipe bending mechanism and the punching mechanism, there is a bent pipe clamping trolley for clamping and moving the bent pipes. The pipe bending mechanism and the punching mechanism of this automatic pipe bending and punching production line are horizontally distributed (i.e., the pipe bending station and the punching station are horizontally distributed). The pipe clamping trolley is used to move the pipe fittings in and out of the station above the station, and cooperate with the actions of the pipe bending mechanism and the punching mechanism to realize automatic pipe bending and punching, improving work efficiency.

Description

Technical Field

[0001] The present invention relates to a pipe bending device, in particular to an automatic pipe bending and punching production line. Background Art

[0002] The current pipe bending device includes a base plate, a rotating shaft, a pipe bending driving device, a movable pipe pressing device and a fixed pipe pressing device. The base plate is vertically arranged, the rotating shaft is horizontally arranged, and the rotating shaft is rotatably arranged on the base plate. The pipe bending driving device is used to drive the pipe pressing device to rotate around the rotating shaft. A part of the pipe to be bent is fixed outside the rotating shaft with the rotating shaft as a fulcrum and in cooperation with the fixed pipe pressing device. The pipe bending driving device applies pressure to the other part of the pipe, and the movable pipe pressing device is driven by the pipe bending driving device to rotate around the rotating shaft, so as to realize the bending of the pipe around the rotating shaft. The pipe placing method of this structure is horizontal pipe placing, so it is difficult to realize automatic production. In addition, the rotating shaft is in a cantilever beam structure and is used as a fulcrum to bear force for a long time, which easily causes the rotating shaft to bend, and the bearings between the rotating shaft and the base plate are unevenly stressed and worn.

[0003] Furthermore, bent pipes (bent metal pipes) are often seen in the medical field, furniture field, etc. However, at present, there is no good solution to the problem of automatically punching the bent pipe (especially the double bent pipe) in the direction of the inner side of the bend. Its operation is mainly to manually place the double bent pipe on the tooling for punching, with low efficiency and high safety hazard risks. Therefore, it further restricts the development of the automatic pipe bending and punching production line. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic pipe bending and punching production line in which the pipe bending and punching stations are horizontally distributed, and a pipe clamping trolley is used to move the pipe fittings in and out of the stations above the stations.

[0005] The purpose of the present invention is achieved as follows:

[0006] An automatic pipe bending and punching production line includes a machine base and a straight pipe storage rack, and is characterized in that: a processing path is formed on the machine base, and a straight pipe storage rack for storing straight pipes, a pipe bending mechanism for bending the straight pipes, and a punching mechanism for opening holes in the bent pipes are sequentially arranged on the processing path. Tracks are arranged above the processing path corresponding to the straight pipe storage rack, the pipe bending mechanism and the punching mechanism. A straight pipe clamping trolley for clamping and moving the straight pipes is arranged on the track corresponding to the space between the straight pipe storage rack and the pipe bending mechanism, and a bent pipe clamping trolley for clamping and moving the bent pipes is arranged on the track corresponding to the space between the pipe bending mechanism and the punching mechanism.

[0007] The purpose of the present invention can also be solved by the following technical measures:

[0008] As a more specific solution, a straight pipe feeding mechanism for feeding the straight pipes into the straight pipe storage rack is arranged on the side of the straight pipe storage rack facing away from the machine base, so as to realize automatic feeding.

[0009] As a further solution, a frame is provided on the machine base corresponding to the straight tube storage rack, tube bending mechanism, punching mechanism, straight tube clamping trolley, and bent tube clamping trolley. A door is provided outside the frame. The door covers the entire production line, reducing noise and preventing accidental contact, thus beautifying and upgrading the production environment.

[0010] As a further solution, the pipe bending mechanism is a double-bend mechanism that bends a straight pipe into a double-bend pipe. The punching mechanism includes a first punching device and a second punching device, which are sequentially arranged behind the pipe bending mechanism, and are arranged on the left and right sides to respectively punch holes in the two ends of the double-bend pipe. Two pipe bending clamping trolleys are provided. Each leg of the double-bend pipe is punched with a set of punching devices.

[0011] As a further solution, the pipe bending mechanism includes a work table, a left rotating shaft, a left pipe bending drive device, a left pipe pressing device, a right rotating shaft, a right pipe bending drive device, a right pipe pressing device and an intermediate pipe pressing device. The left rotating shaft and the right rotating shaft are distributed on the left and right and are respectively rotatably arranged on the work table. The left rotating shaft and the right rotating shaft are respectively sleeved with a left gasket and a right gasket. The left pipe bending drive device is used to drive the left rotating shaft to rotate. The left pipe pressing device includes a left pipe pressing cylinder, a left rotating arm and a left pressing block. The left rotating arm is transmission-connected to the left rotating shaft. The left pipe pressing cylinder is arranged on the left rotating arm and is transmission-connected to the left pressing block. The left pressure block is located outside the left side of the left gasket; the right bend pipe driving device is used to drive the right rotating shaft to rotate. The right pipe pressing device includes a right pipe pressing cylinder, a right rotating arm and a right pressure block. The right rotating arm is connected to the right rotating shaft by transmission. The right pipe pressing cylinder is set on the right rotating arm and is connected to the right pressure block by transmission. The right pressure block is located outside the right side of the right gasket; the middle pipe pressing device includes a medium-pressure pipe cylinder and a medium pressure block. The medium-pressure pipe cylinder is fixed on the workbench and is connected to the medium pressure block by transmission. The medium pressure block faces between the left and right gaskets. A clearance area is also formed between the medium pressure block, the left gasket and the right gasket. The clearance area is to allow the chuck of the straight pipe or bend pipe clamping trolley to extend into the workpiece for loading and unloading.

[0012] As a further solution, the first punching device includes a first bearing plate, a first fixed mold, a first movable mold, a first mold clamping oil cylinder, a first core inserting cylinder, a first core rod, a first punching mechanism, a base, and a pushing cylinder. The first fixed mold is fixedly arranged on the first bearing plate, the first movable mold is slidably arranged on the first bearing plate, and the first mold clamping oil cylinder is connected between the first bearing plate and the first movable mold to control the relative opening and closing movement of the first movable mold and the first fixed mold. A first clamping cavity is formed between the first fixed mold and the first movable mold. The first core rod is in transmission connection with the first core inserting cylinder, and the first core inserting cylinder controls the first core rod to insert into the first clamping cavity. The first punching mechanism is arranged on the first fixed mold and / or the first movable mold, and a first pin hole communicating with the first clamping cavity is arranged on the first fixed mold and / or the first movable mold corresponding to the first punching mechanism. The first bearing plate is slidably arranged on the base, and a pushing cylinder is arranged between the base and the first bearing plate, and the pushing cylinder controls the first bearing plate to slide on the base.

[0013] As a further solution, the second punching device includes a second bearing plate, a second fixed mold, a second movable mold, a second mold clamping oil cylinder, a second core inserting cylinder, a second core rod, a second punching mechanism, a pressure head, a pushing cylinder, a front extension platform, and a rear extension platform. The second fixed mold is fixedly arranged on the second bearing plate, the second movable mold is slidably arranged on the second bearing plate, and the second mold clamping oil cylinder is connected between the second bearing plate and the second movable mold to control the relative opening and closing movement of the second movable mold and the second fixed mold. A second clamping cavity is formed between the second fixed mold and the second movable mold. The second core rod is in transmission connection with the second core inserting cylinder, and the second core inserting cylinder controls the second core rod to insert into the second clamping cavity. The second punching mechanism is arranged on the second fixed mold and / or the second movable mold, and a second pin hole communicating with the second clamping cavity is arranged on the second fixed mold and / or the second movable mold corresponding to the second punching mechanism. The front extension platform and the rear extension platform are respectively arranged at the front and rear ends of the second bearing plate. The second clamping cavity points forward and backward. The pushing cylinder is arranged on the front extension platform and is in transmission connection with the pressure head. The pressure head is located outside the front end of the second clamping cavity, and the second core inserting cylinder is arranged on the rear extension platform.

[0014] Both the above-mentioned first punching device and the second punching device have core inserting actions. The core rod is also provided with holes corresponding to the pin holes. The core rod is inserted into the pin, and then the pin is punched to prevent the pin from being flattened.

[0015] As a further solution, the straight pipe clamping trolley includes a first sliding plate, a first driving motor, a first lifting driving cylinder, a first lifting plate, and two sets of pipe clamping mechanisms on the left and right. The first sliding plate is slidably arranged on the track. The first driving motor is arranged on the first sliding plate, and the first driving motor is in transmission connection with a driving gear. A straight rack is arranged beside the track, and the straight rack is arranged parallel to the track. The driving gear meshes with the straight rack. The first lifting driving cylinder is arranged on the first sliding plate and is in transmission connection with the first lifting plate. The first lifting plate is arranged below the first sliding plate, and two sets of pipe clamping mechanisms on the left and right are respectively arranged on the first lifting plate in a left-right distribution.

[0016] As a further solution, the elbow clamping trolley includes a second slide plate, a second driving motor, a second lifting driving cylinder, a second lifting plate, a set of pipe clamping mechanism and two sets of elbow side supporting devices on the left and right. The second slide plate is slidably arranged on the track. The second driving motor is arranged on the second slide plate. The second driving motor is in transmission connection with a second driving gear, and the second driving gear meshes with a straight rack. The second lifting driving cylinder is arranged on the second slide plate and is in transmission connection with the second lifting plate. The second lifting plate is arranged below the second slide plate. The pipe clamping mechanism is located in the middle of the second lifting plate. The two sets of elbow side supporting devices on the left and right are respectively arranged on the second lifting plate in a left-right distribution. The pipe clamping mechanism and the elbow side supporting devices are staggered in the front and back. The set of pipe clamping mechanism is used for clamping the middle part of the double elbow pipe. The two sets of elbow side supporting devices on the left and right are used for supporting the outer sides of the left and right two pipe ends of the double elbow pipe, so that the double elbow pipe is kept in a horizontal state.

[0017] As a further solution, the straight pipe storage rack includes a pipe rack, a feeding arm and a separating fork head assembly. The pipe rack is provided with a U-shaped groove for placing the straight pipes in the vertical direction. The left and right sides at the front end of the pipe rack are provided with shaft seats. The feeding arm is rotatably arranged on the shaft seats. The shaft seats are provided with limit protrusions higher than the upper surface of the feeding arm. The separating fork head assembly has two sets on the left and right. One end of each set of separating fork head assemblies is connected with a linkage push plate. The other end of the separating fork head assembly extends into the vertical plane where the U-shaped groove in the pipe rack is located. The linkage push plate is slidably arranged on the pipe rack in the front and back directions.

[0018] As a further solution, the separating fork head assembly includes more than one separating fork head. When there are more than two separating fork heads, the separating fork heads are distributed from top to bottom, and each separating fork head is staggered in the front and back direction from top to bottom in turn.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) The elbow bending mechanism and the punching mechanism of this automatic elbow bending and punching production line are horizontally distributed (that is, the elbow bending station and the punching station are horizontally distributed). The pipe clamping trolley is used to move the pipe fittings in and out of the station above the station, and cooperate with the actions of the elbow bending mechanism and the punching mechanism to realize automatic elbow bending and punching, improving work efficiency.

[0021] (2) The elbow bending mechanism of this automatic elbow bending and punching production line is a double elbow bending mechanism. There are two sets of punching mechanisms. The two sets of punching mechanisms respectively punch the two pipe ends of the double elbow pipe. Moreover, the two sets of punching mechanisms are distributed on the left and right and staggered in the front and back, without mutual interference.

[0022] (3) This automatic elbow bending and punching production line uses up-and-down feeding and taking, and the separating fork head assembly of the straight pipe storage rack can separate multiple straight pipes distributed up and down at a suitable distance. Therefore, multiple straight pipes can be bent at the same time, further improving work efficiency.

[0023] (4) The pipe bending and clamping trolley of this automatic pipe bending and punching production line can keep multiple bent pipes at the same angle, so as to orderly place them into the punching mechanism at the same time for unified punching. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0025] Figure 2 It is Figure 1 Another perspective three-dimensional structural diagram of

[0026] Figure 3 It is Figure 1 Top view structural diagram.

[0027] Figure 4 It is a schematic structural diagram of the present invention after removing the straight pipe clamping trolley and the bent pipe clamping trolley.

[0028] Figure 5 It is a schematic structural diagram of the present invention after installing the frame, straight pipe storage rack, straight pipe feeding mechanism and machine base.

[0029] Figure 6 It is Figure 5 Schematic structural diagram of the frame of after installing the door body.

[0030] Figure 7 It is a schematic combined structural diagram of the bent pipe mechanism, straight pipe clamping trolley, bent pipe clamping trolley and straight pipe storage rack in the present invention.

[0031] Figure 8 It is Figure 7 Another perspective three-dimensional structural diagram of

[0032] Figure 9 It is a top view structural diagram of the bent pipe mechanism in the present invention.

[0033] Figure 10 It is Figure 9 C-C sectional structural diagram of

[0034] Figure 11 It is a three-dimensional structural diagram of the bent pipe mechanism in the present invention.

[0035] Figure 12 It is a three-dimensional (with double bent pipes) structural diagram of another perspective of the bent pipe mechanism in the present invention.

[0036] Figure 13 It is a structural diagram of one angle of the straight pipe clamping trolley in the present invention.

[0037] Figure 14 It is a structural diagram of another angle of the straight pipe clamping trolley in the present invention.

[0038] Figure 15 This is a schematic structural diagram of the straight pipe storage rack in the present invention.

[0039] Figure 16 For Figure 15 Another perspective three-dimensional structural diagram.

[0040] Figure 17 This is a schematic structural diagram of the first punching device in the present invention from one angle.

[0041] Figure 18 This is a schematic structural diagram of the first punching device in the present invention from another angle.

[0042] Figure 19 This is a schematic structural diagram of the second punching device in the present invention from one angle.

[0043] Figure 20 This is a schematic structural diagram of the second punching device in the present invention from another angle. Detailed implementation manners

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0045] Refer to Figures 1 to 20 As shown, an automatic pipe bending and punching production line includes a machine base 80 and a straight pipe storage rack 1, and is characterized in that: a processing path is formed on the machine base 80, and sequentially provided on the processing path are a straight pipe storage rack 1 for storing straight pipes, a pipe bending mechanism 10 for bending the straight pipes, and a punching mechanism for punching the bent pipes after bending. Above the processing path corresponding to the straight pipe storage rack 1, the pipe bending mechanism 10 and the punching mechanism, there is a track 20. On the track 20, corresponding to between the straight pipe storage rack 1 and the pipe bending mechanism 10, there is a straight pipe clamping trolley 2 for clamping and moving the straight pipes, and on the track 20, corresponding to between the pipe bending mechanism 10 and the punching mechanism, there is a bent pipe clamping trolley 3 for clamping and moving the bent pipes.

[0046] On the side of the straight pipe storage rack 1 facing away from the machine base 80, there is a straight pipe feeding mechanism 70 for feeding the straight pipes into the straight pipe storage rack 1.

[0047] Outside the machine base 80 corresponding to the straight pipe storage rack 1, the pipe bending mechanism 10, the punching mechanism, the straight pipe clamping trolley 2 and the bent pipe clamping trolley 3, there is a frame 110, and outside the frame 110, there is a door body 100.

[0048] The pipe bending mechanism 10 is a double pipe bending mechanism for bending the straight pipe into a double bent pipe. The punching mechanism includes a first punching device 50 and a second punching device 60. The first punching device 50 and the second punching device 60 are sequentially arranged behind the pipe bending mechanism 10, and moreover, the first punching device 50 and the second punching device 60 are distributed one on the left and one on the right to respectively punch the two ends of the double bent pipe; there are two bent pipe clamping trolleys 3.

[0049] The pipe bending mechanism 10 includes a workbench 9, a left rotating shaft 92, a left pipe bending drive device, a left pipe pressing device, a right rotating shaft 94, a right pipe bending drive device, a right pipe pressing device and an intermediate pipe pressing device. The left rotating shaft 92 and the right rotating shaft 94 are distributed on the left and right sides and are respectively rotatably arranged on the workbench 9. The left rotating shaft 92 and the right rotating shaft 94 are respectively sleeved with a left gasket 93 and a right gasket 95. The left pipe bending drive device is used to drive the left rotating shaft 92 to rotate. The left pipe pressing device includes a left pipe pressing cylinder 7, a left rotating arm 71 and a left pressure block 75. The left rotating arm 71 is connected to the left rotating shaft 92 in transmission. The left pipe pressing cylinder 7 is arranged on the left rotating arm 71 and is connected to the left pressure block 75 in transmission. The left pressure block 75 Located outside the left side of the left gasket 93; the right bend pipe driving device is used to drive the right rotating shaft 94 to rotate, the right pressure pipe device includes a right pressure pipe cylinder 8, a right rotating arm 81 and a right pressure block 85, the right rotating arm 81 is transmission connected to the right rotating shaft 94, the right pressure pipe cylinder 8 is arranged on the right rotating arm 81, and is transmission connected to the right pressure block 85, and the right pressure block 85 is located outside the right side of the right gasket 95; the intermediate pressure pipe device includes a medium-pressure pipe cylinder 4 and a medium pressure block 41, the medium-pressure pipe cylinder 4 is fixedly arranged on the workbench 9, and is transmission connected to the medium pressure block 41, the medium pressure block 41 is facing between the left gasket 93 and the right gasket 95, and a clearance area 101 is also formed between the medium pressure block 41, the left gasket 93 and the right gasket 95.

[0050] The workbench 9 is provided with a vertical support plate 96 , and the upper end of the vertical support plate 96 is provided with a top support plate 91 , which is rotatably matched with the left rotation shaft 92 and the right rotation shaft 94 respectively.

[0051] The left bend pipe driving device includes a left bend pipe driving cylinder 5, a left driving rack 51 and a left driving gear 921. The left driving gear 921 is located below the work table 9 and is fixedly connected to the lower end of the left rotating shaft 92. The left driving rack 51 is transmission connected to the left bend pipe driving cylinder 5 and meshes with the left driving gear 921; the right bend pipe driving device includes a right bend pipe driving cylinder 6, a right driving rack 61 and a right driving gear 941. The right driving gear 941 is located below the work table 9 and is fixedly connected to the lower end of the right rotating shaft 94. The right driving rack 61 is transmission connected to the right bend pipe driving cylinder 6 and meshes with the right driving gear 941.

[0052] The left pipe pressing device also includes a left support seat 72, a left slider 73, and a left slide rail 74. The left support seat 72 is connected to the piston rod of the left pipe pressing cylinder 7 in a transmission manner. A left slider 73 is horizontally arranged on the left support seat 72. The left slide rail 74 is arranged on the outside of the left pressure block 75 and slides with the left slider 73. The cylinder body of the left pipe pressing cylinder 7 is fixedly connected to the left rotating arm 71; the right pipe pressing device also includes a right support seat 82, a right slider 83, and a right slide rail 84. The right support seat 82 is connected to the piston rod of the right pipe pressing cylinder 8. A right slider 83 is horizontally arranged on the right support seat 82. The left slide rail 74 is arranged on the outside of the right pressure block 85 and slides with the right slider 83. The cylinder body of the right pipe pressing cylinder 8 is fixedly connected to the right rotating arm 81.

[0053] A left wear-resistant pad 76 is provided between the left rotating arm 71 and the work table 9 , and a right wear-resistant pad 86 is provided between the right rotating arm 81 and the work table 9 .

[0054] The surfaces of the left gasket 93 , the left pressure block 75 , the right gasket 95 , the right pressure block 85 and the middle pressure block 41 are all provided with two or more positioning grooves, and the positioning grooves are arranged up and down.

[0055] A lower support plate 97 is further provided below the workbench 9 , and a bottom support plate 98 is provided at the bottom of the lower support plate 97 . The bottom support plate 98 is rotatably engaged with the lower ends of the left rotating shaft 92 and the right rotating shaft 94 .

[0056] The first punching device 50 includes a first supporting plate 504, a first fixed mold 505, a first movable mold 506, a first mold clamping cylinder 5061, a first core inserting cylinder 509, a first core rod 5071, a first punching mechanism, a base 502 and a pushing cylinder 501. The first fixed mold 505 is fixedly arranged on the first supporting plate 504, and the first movable mold 506 is slidably arranged on the first supporting plate 504. The first mold clamping cylinder 5061 is connected between the first supporting plate 504 and the first movable mold 506 to control the relative opening and closing movement of the first movable mold 506 and the first fixed mold 505. A first clamping cavity is formed between the mold 505 and the first movable mold 506, the first core rod 5071 is transmission-connected to the first core inserting cylinder 509, the first core inserting cylinder 509 controls the first core rod 5071 to be inserted into the first clamping cavity, the first fixed mold 505 is provided with the first punching mechanism, and the first fixed mold 505 is provided with a first pin hole connected to the first clamping cavity corresponding to the first punching mechanism; the first supporting plate 504 is slidably set on the base 502, and a pushing cylinder 501 is provided between the base 502 and the first supporting plate 504, and the pushing cylinder 501 controls the first supporting plate 504 to slide on the base 502.

[0057] A first base 507 is provided at the outer end of the piston rod of the first core inserting cylinder, and the first core rod 5071 is connected to the first base 507 .

[0058] The first punching mechanism includes a first punching oil cylinder 5051, a first pushing plate 5052, and a first punching pin. The first punching oil cylinder 5051 is arranged on the fixed mold. The first pushing plate 5052 is in transmission connection with the first punching oil cylinder. The first punching pin is connected to the first pushing plate 5052 and points to the pin hole.

[0059] The second punching device 60 includes a second bearing plate 608, a second fixed mold 6016, a second moving mold 606, a second mold closing oil cylinder 607, a second core inserting cylinder 601, a second core rod, a second punching mechanism, a pressing head 6013, a pushing cylinder 6011, a front extension platform 6010, and a rear extension platform 603. The second fixed mold 6016 is fixedly arranged on the second bearing plate 608. The second moving mold 606 is slidably arranged on the second bearing plate 608. The second mold closing oil cylinder 607 is connected between the second bearing plate 608 and the second moving mold 606 to control the relative opening and closing movement of the second moving mold 606 and the second fixed mold 6016. A second clamping cavity is formed between the second fixed mold 6016 and the second moving mold 606. The second core rod is in transmission connection with the second core inserting cylinder 601. The second core inserting cylinder 601 controls the second core rod to insert into the second clamping cavity. The second punching device 60 is provided on the second fixed mold 6016 and the second moving mold 606. The second fixed mold 6016 and the second moving mold 606 are provided with second pin holes corresponding to the second punching device 60 and communicating with the second clamping cavity. The front extension platform 6010 and the rear extension platform 603 are distributively arranged at the front and rear ends of the second bearing plate 608. The second clamping cavity points forward and backward. The pushing cylinder 6011 is arranged on the front extension platform 6010 and is in transmission connection with the pressing head 6013. The pressing head 6013 is located outside the front end of the second clamping cavity. The second core inserting cylinder 601 is arranged on the rear extension platform 603.

[0060] A second base 6017 is provided at the outer end of the piston rod of the second core inserting cylinder 601. The second core rod is connected to the second base 6017.

[0061] A third arc-shaped concave pit is provided on the surface of the pressing head 6013 corresponding to the height position of the second clamping cavity.

[0062] The second punching mechanism includes second punching oil cylinders 6062 and 6019, second pushing plates 6061 and 6018, and second punching pins 6063. The moving mold and the fixed mold are respectively provided with second punching oil cylinders 6062 and 6019. The pushing plates are in transmission connection with the punching oil cylinders. The punching pins are connected to the pushing plates and point to the pin holes.

[0063] The straight pipe clamping trolley 2 includes a first slide plate 23, a first driving motor 27, a first lifting driving cylinder 21, a first lifting plate 24 and two sets of pipe clamping mechanisms on the left and right. The first slide plate 23 is slidably arranged on the track 20. The first driving motor 27 is arranged on the first slide plate 23 and is in transmission connection with a driving gear 28. A straight rack is arranged beside the track 20 and is arranged relatively parallel to the track 20. The driving gear 28 meshes with the straight rack. The first lifting driving cylinder 21 is arranged on the first slide plate 23 and is in transmission connection with the first lifting plate 24. The first lifting plate 24 is arranged below the first slide plate 23. The two sets of pipe clamping mechanisms on the left and right are respectively arranged on the first lifting plate 24 in a left-right distribution. The pipe clamping mechanism of the straight pipe clamping trolley 2 includes a first finger clamping cylinder 25 and a first pipe clamp 26. The first finger clamping cylinder 25 is arranged at the bottom of the first lifting plate 24. The first pipe clamp 26 is arranged at the lower end of the first finger clamping cylinder 25 and is in transmission connection with the first finger clamping cylinder 25. A first longitudinal guide rod 22 is arranged on the first lifting plate 24, and the first longitudinal guide rod 22 is in up-and-down sliding fit with the first slide plate 23.

[0064] The bent pipe clamping trolley 3 includes a second slide plate 33, a second driving motor, a second lifting driving cylinder 31, a second lifting plate 34, a set of pipe clamping mechanism and two sets of bent pipe side supporting devices 37 on the left and right. The second slide plate 33 is slidably arranged on the track 20. The second driving motor is arranged on the second slide plate 33 and is in transmission connection with a second driving gear 28. The second driving gear 28 meshes with the straight rack. The second lifting driving cylinder 31 is arranged on the second slide plate 33 and is in transmission connection with the second lifting plate 34. The second lifting plate 34 is arranged below the second slide plate 33. The pipe clamping mechanism is located in the middle of the second lifting plate 34. The two sets of bent pipe side supporting devices 37 on the left and right are respectively arranged on the second lifting plate 34 in a left-right distribution. The pipe clamping mechanism and the bent pipe side supporting devices are staggered front and back. The pipe clamping mechanism of the bent pipe clamping trolley 3 includes a second finger clamping cylinder 35 and a second pipe clamp 36. The second finger clamping cylinder 35 is arranged at the bottom of the second lifting plate 34. The second pipe clamp 36 is arranged at the lower end of the second finger clamping cylinder 35 and is in transmission connection with the second finger clamping cylinder 35. A second longitudinal guide rod 32 is arranged on the second lifting plate 34, and the second longitudinal guide rod 32 is in up-and-down sliding fit with the second slide plate 33. The bent pipe side supporting device 37 includes a pipe supporting driving cylinder 371 placed laterally and a pipe supporting block 372. The pipe supporting block 372 is in transmission connection with the pipe supporting driving cylinder 371. An arc-shaped pit is arranged on the surface of the pipe supporting block 372 corresponding to the outer side of the pipe body to position the pipe body.

[0065] The straight pipe storage rack 1 includes a pipe rack 11, a feeding arm 17, and a separating fork head assembly. The pipe rack 11 is provided with a U-shaped groove 12 for placing straight pipes in the vertical direction. On the left and right sides of the front end of the pipe rack 11, there are shaft seats 14. The feeding arm 17 is rotatably arranged on the shaft seats 14. The shaft seats 14 are provided with limit protrusions 141 that are higher than the upper surface of the feeding arm 17. There are two sets of left and right separating fork head assemblies. One end of each separating fork head assembly is connected to a linkage push plate 16, and the other end of the separating fork head assembly extends into the vertical plane where the U-shaped groove 12 in the pipe rack 11 is located. The linkage push plate 16 is slidably arranged back and forth on the pipe rack 11. There are two left and right feeding arms 17, and the two left and right feeding arms 17 are connected by a connecting rod 171. A synchronizing shaft 15 is connected between the two left and right shaft seats 14, and the feeding arm 17 is arranged on the synchronizing shaft 15. The pipe rack 11 is provided with a transverse guide rod 18 pointing forward and backward, and the linkage push plate 16 is slidably arranged on the transverse guide rod 18. The linkage push plate 16 can be driven by a cylinder. The synchronizing shaft 15 can be driven by a cylinder or a motor.

[0066] The separating fork head assembly includes more than one separating fork head 13. When there are more than two separating fork heads 13, the separating fork heads 13 are distributed from top to bottom, and each separating fork head 13 is staggered back and forth from top to bottom in sequence.

[0067] The straight pipe feeding mechanism 70 includes a frame 704. A hopper 701 is arranged on the frame 704. The bottom of the hopper 701 is inclined towards the straight pipe storage rack 1. One end of the hopper 701 close to the straight pipe storage rack 1 is provided with a conveyor belt 702. The conveyor belt 702 conveys the straight pipes in the hopper 701 upwards. There is a guiding inclined pipe (not shown in the figure) between the upper end of the conveyor belt 702 and the feeding arm 17. The conveyor belt 702 sends the straight pipe 30 out onto the guiding inclined pipe, and the straight pipe 30 falls onto the feeding arm 17 and is blocked by the limit protrusion 141, as shown at Figure 8 A in the figure. The number of straight pipes stored on the feeding arm 17 is equal to the number of pipes that the bending mechanism 10 can bend. By controlling the feeding arm 17 to swing upwards, the corresponding number of straight pipes can be lifted higher than the limit protrusion 141, and the straight pipes can fall into the U-shaped groove 12, as shown at Figure 8 B in the figure. When the separating fork head assembly moves towards the U-shaped groove 12, the straight pipes in the U-shaped groove 12 can be separated.

[0068] The working principle is as follows: the straight tube clamping trolley 2 moves the four straight tubes on the straight tube storage rack 1 to between the middle pressure block 41 and the left and right rotating shafts of the tube bending mechanism 10. The middle pressure block 41 presses the straight tubes toward the rotating shaft. Simultaneously, the first tube clamp 26 of the straight tube clamping trolley 2 opens and leaves the clearance area, and the tube bending mechanism begins to operate, bending the straight tubes into double-bent tubes 40. Then, the pushing cylinder 501 of the first punching device 50 pushes the first carrier plate 504 and the mold thereon toward the outside of one side of the double-bent tube on the tube bending mechanism 10, and the first core inserting cylinder 509 inserts the first core rod 5071 into the tube pin on that side. Then, the mold closing and punching operation is carried out. Finally, the mold is opened, the core rod is withdrawn, and the first bend tube clamping trolley 3 moves the double bend tube 40 with one side already punched to the second punching device 60, and places the middle part of the double bend tube in the second punching device 60. The tube pin to be punched falls into the second clamping cavity, the second core rod is inserted into the tube pin, and the pressure head 6013 presses the middle part of the double bend tube, and then the mold is closed and punched to complete the punching of the other tube pin. Finally, the double bend tube that has been finally punched is moved out of the machine base by the second bend tube clamping trolley. Among them, an inclined tube can be set at the rear end of the machine base, and the second bend tube clamping trolley places the double bend tube on the inclined tube, and the double bend tube can slide along the inclined tube to the specified position. In addition, when the second punching device 60 is working, it does not affect the tube bending processing of the tube bending mechanism, thereby improving work efficiency.

Claims

1. An automatic pipe bending and punching production line, comprising a machine base (80) and a straight pipe storage rack (1), characterized in that: A processing path is formed on the machine base (80). A straight pipe storage rack (1) for storing straight pipes, a pipe bending mechanism (10) for bending the straight pipes, and a punching mechanism for punching the bent pipes are successively arranged on the processing path. A track (20) is arranged above the processing path corresponding to the straight pipe storage rack (1), the pipe bending mechanism (10), and the punching mechanism. A straight pipe clamping trolley (2) for clamping and moving the straight pipes is arranged on the track (20) corresponding to between the straight pipe storage rack (1) and the pipe bending mechanism (10). A bent pipe clamping trolley (3) for clamping and moving the bent pipes is arranged on the track (20) corresponding to between the pipe bending mechanism (10) and the punching mechanism); The pipe bending mechanism (10) is a double-bend pipe mechanism for bending a straight pipe into a double-bend pipe. The punching mechanism includes a first punching device (50) and a second punching device (60). The first punching device (50) and the second punching device (60) are successively arranged behind the pipe bending mechanism (10). Moreover, the first punching device (50) and the second punching device (60) are distributed one on the left and one on the right to respectively punch the two end bent pipes of the double-bend pipe; Two bent pipe clamping trolleys (3) are provided; The straight pipe storage rack (1) includes a pipe rack (11), a feeding arm (17), and a separating fork head assembly. A U-shaped groove (12) for vertically placing the straight pipes is arranged on the pipe rack (11). Axis seats (14) are arranged on the left and right sides at the front end of the pipe rack (11). A feeding arm (17) is rotatably arranged on the axis seats (14). A limiting protrusion (141) higher than the upper surface of the feeding arm (17) is arranged on the axis seats (14). There are two groups of left and right separating fork head assemblies. One end of each separating fork head assembly is connected to a linkage push plate (16). The other end of the separating fork head assembly extends into the vertical plane where the U-shaped groove (12) in the pipe rack (11) is located. The linkage push plate (16) is slidably arranged back and forth on the pipe rack (11); The separating fork head assembly includes more than one separating fork head (13). When there are more than two separating fork heads (13), the separating fork heads (13) are distributed from top to bottom, and each separating fork head (13) is successively staggered back and forth from top to bottom; The first punching device (50) comprises a first supporting plate (504), a first fixed mold (505), a first movable mold (506), a first mold closing oil cylinder (5061), a first core inserting cylinder (509), a first core rod (5071), a first punching mechanism, a base (502) and a pushing cylinder (501); the first fixed mold (505) is fixedly arranged on the first supporting plate (504); the first movable mold (506) is slidably arranged on the first supporting plate (504); the first mold closing oil cylinder (5061) is connected between the first supporting plate (504) and the first movable mold (506) to control the relative opening and closing movement of the first movable mold (506) and the first fixed mold (505); A first clamping cavity is formed between a fixed mold (505) and a first movable mold (506); a first core rod (5071) is connected to a first core inserting cylinder (509) by transmission; the first core inserting cylinder (509) controls the first core rod (5071) to be inserted into the first clamping cavity; the first fixed mold (505) is provided with the first punching mechanism; the first movable mold (506) is provided with a first pin hole communicating with the first clamping cavity corresponding to the first punching mechanism; the first supporting plate (504) is slidably arranged on the base (502); a pushing cylinder (501) is provided between the base (502) and the first supporting plate (504); the pushing cylinder (501) controls the first supporting plate (504) to slide on the base (502).

2. The automatic pipe bending and punching production line according to claim 1, characterized in that: A straight tube feeding mechanism (70) for feeding straight tubes into the straight tube storage rack (1) is provided on a side of the straight tube storage rack (1) facing away from the machine base (80).

3. The automatic pipe bending and punching production line according to claim 1, wherein: A frame (110) is provided on the machine base (80) corresponding to the straight pipe storage rack (1), the pipe bending mechanism (10), the punching mechanism, the straight pipe clamping trolley (2) and the bent pipe clamping trolley (3), and a door body (100) is provided on the outside of the frame (110).

4. The automatic pipe bending and punching production line according to claim 1, wherein: The pipe bending mechanism (10) includes a workbench (9), a left rotating shaft (92), a left pipe bending drive device, a left pipe pressing device, a right rotating shaft (94), a right pipe bending drive device, a right pipe pressing device and an intermediate pipe pressing device. The left rotating shaft (92) and the right rotating shaft (94) are distributed on the left and right sides and are respectively rotatably arranged on the workbench (9). The left rotating shaft (92) and the right rotating shaft (94) are respectively provided with a left pad sleeve (93) and a right pad sleeve (95). The left pipe bending drive device is used to drive the left rotating shaft (92) to rotate. The left pipe pressing device includes a left pipe pressing cylinder (7), a left rotating arm (71) and a left pressing block (75). The left rotating arm (71) is connected to the left rotating shaft (92) in a transmission manner. The left pipe pressing cylinder (7) is arranged on the left rotating arm (71) and is connected to the left pressing block (75) in a transmission manner. The left pressing block (75) is located on the left rotating arm (71). The left side of the gasket (93) is outside; the right bend pipe driving device is used to drive the right rotating shaft (94) to rotate, the right pressure pipe device includes a right pressure pipe cylinder (8), a right rotating arm (81) and a right pressure block (85), the right rotating arm (81) is transmission-connected to the right rotating shaft (94), the right pressure pipe cylinder (8) is arranged on the right rotating arm (81) and is transmission-connected to the right pressure block (85), and the right pressure block (85) is located outside the right side of the right gasket (95); the intermediate pressure pipe device includes a medium-pressure pipe cylinder (4) and a medium pressure block (41), the medium-pressure pipe cylinder (4) is fixedly arranged on the workbench (9) and is transmission-connected to the medium pressure block (41), the medium pressure block (41) faces between the left gasket (93) and the right gasket (95), and a clearance area (101) is formed between the medium pressure block (41), the left gasket (93) and the right gasket (95).

5. The automatic pipe bending and punching production line according to claim 1, characterized in that: The second punching device (60) includes a second bearing plate (608), a second fixed mold (6016), a second movable mold (606), a second mold clamping oil cylinder (607), a second core inserting cylinder (601), a second core rod, a second punching mechanism, a pressure head (6013), a pushing cylinder (6011), a front extension platform (6010) and a rear extension platform (603). The second fixed mold (6016) is fixedly arranged on the second bearing plate (608), the second movable mold (606) is slidably arranged on the second bearing plate (608), and the second mold clamping oil cylinder (607) is connected between the second bearing plate (608) and the second movable mold (606) to control the relative opening and closing movement of the second movable mold (606) and the second fixed mold (6016); a second clamping cavity is formed between the second fixed mold (6016) and the second movable mold (606), the second core rod is in transmission connection with the second core inserting cylinder (601), and the second core inserting cylinder (601) controls the second core rod to insert into the second clamping cavity. The second punching mechanism is arranged on the second fixed mold (6016), and the second movable mold (606) is provided with a second pin hole communicated with the second clamping cavity corresponding to the second punching mechanism; the front extension platform (6010) and the rear extension platform (603) are respectively arranged at the front and rear ends of the second bearing plate (608), the second clamping cavity points forward and backward, the pushing cylinder (6011) is arranged on the front extension platform (6010) and is in transmission connection with the pressure head (6013), the pressure head (6013) is located outside the front end of the second clamping cavity, and the second core inserting cylinder (601) is arranged on the rear extension platform (603).

6. The automatic pipe bending and punching production line according to claim 1, wherein: The straight pipe clamping trolley (2) includes a first sliding plate (23), a first driving motor (27), a first lifting driving cylinder (21), a first lifting plate (24) and two sets of pipe clamping mechanisms on the left and right. The first sliding plate (23) is slidably arranged on the track (20), the first driving motor (27) is arranged on the first sliding plate (23), the first driving motor (27) is in transmission connection with a driving gear (28), a straight rack is arranged beside the track (20), the straight rack is arranged parallel to the track (20), and the driving gear (28) is meshed with the straight rack; the first lifting driving cylinder (21) is arranged on the first sliding plate (23) and is in transmission connection with the first lifting plate (24), the first lifting plate (24) is arranged below the first sliding plate (23), and two sets of pipe clamping mechanisms on the left and right are respectively arranged on the first lifting plate (24) in a left-right distribution manner.

7. The automatic pipe bending and punching production line according to claim 6, characterized in that: The bent pipe clamping trolley (3) includes a second slide plate (33), a second driving motor, a second lifting driving cylinder (31), a second lifting plate (34), a set of pipe clamping mechanisms and two sets of bent pipe side supporting devices on the left and right. The second slide plate (33) is slidably arranged on the track (20). The second driving motor is arranged on the second slide plate (33). The second driving motor is in transmission connection with a second driving gear (28). The second driving gear (28) meshes with a straight rack. The second lifting driving cylinder (31) is arranged on the second slide plate (33) and is in transmission connection with the second lifting plate (34). The second lifting plate (34) is arranged below the second slide plate (33). The pipe clamping mechanism is located in the middle of the second lifting plate (34). The two sets of bent pipe side supporting devices on the left and right are respectively arranged on the second lifting plate (34) in a left-right distribution. The pipe clamping mechanism and the bent pipe side supporting devices are staggered front and back.

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