Automatic stainless steel pipe bending device

Abstract

The invention discloses an automatic bending device for a stainless steel pipe, which belongs to the technical field of steel pipe bending and comprises a pipe feeding device, a conveying device is arranged on the pipe feeding device and used for driving the stainless steel pipe to move, and a bending device is arranged on the conveying device and used for bending the stainless steel pipe. According to the pipe feeding device, one stainless steel pipe can be fed each time, the stainless steel pipe is inserted into the pipe base after the posture of the stainless steel pipe is automatically adjusted, the whole process and the subsequent stainless steel pipe bending machining work process are carried out cooperatively, and the automation degree is high; the conveying device can drive the stainless steel pipe to be conveyed, automatic sand injection, capping, bending and other actions are achieved on the stainless steel pipe, all the processes are carried out synchronously, when operation actions are carried out, the conveying belt stops rotating, and the automation degree is high; sand and a cover are arranged in the stainless steel pipe before the stainless steel pipe is bent, so that deformation of the stainless steel pipe during bending is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe bending, and in particular to an automatic stainless steel pipe bending device. Background Art

[0002] Stainless steel pipes are common pipes in daily life. Under normal circumstances, elbows are required to connect pipe bends, but elbows cannot be made for non-right-angle bends, so the steel pipes need to be bent. If the steel pipes are bent directly, wrinkles or even deformations may occur, and even severe fractures may occur. In this case, preparations need to be made before bending, such as sand filling, auxiliary springs, etc., to reduce deformation. The stainless steel pipe bending machines in the prior art usually require manual loading and unloading, manual sand filling, and manual adjustment of the bending angle. Each step of bending the steel pipe requires manual participation, and the degree of automation is low. At the same time, the stainless steel pipe cannot be bent continuously, which results in low efficiency. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: an automatic bending device for stainless steel pipes, comprising a pipe feeding device, the pipe feeding device comprising a feeding box, the pipe feeding device is provided with a conveying device, the conveying device comprises a transmission frame, the conveying device is used to drive the stainless steel pipe to move, the conveying device is provided with a bending device, the bending device comprises an electric cylinder frame, the electric cylinder frame is fixedly mounted on the transmission frame, and the bending device is used to bend the stainless steel pipe.

[0004] Furthermore, the pipe feeding device includes a lifting frame slidably mounted on the feed box, an inclined surface is arranged inside the feed box, a turntable gear is rotatably mounted on the feed box, a rotating rod is fixedly mounted on the turntable gear, a transmission belt is wrapped around the outside of the turntable gear, an outer rotating rod is rotatably mounted on the rotating rod, the outer rotating rod is rotatably mounted with the lifting frame, a closing ejection plate is fixedly mounted on the lifting frame, and a lower ejector column and a descending rack are fixedly mounted on the lifting frame.

[0005] Furthermore, a clamping mechanism is provided on the transmission frame, and the clamping mechanism includes a rotating seat rotatably mounted on the transmission frame, a rotating gear is fixedly mounted on the rotating seat, an upper clamp and a lower clamp are rotatably mounted on the rotating seat, rubber pads are provided in the lower clamp and the lower clamp, and torsion springs are respectively provided between the upper clamp and the lower clamp and the rotating seat.

[0006] The stainless steel pipe to be bent is placed in the feed box, and the feed box rolls toward the closed ejector plate through the inclined surface in the feed box and is blocked by the closed ejector plate. The rear gear drives the turntable gear and the rotating rod to rotate through the transmission belt, thereby driving the outer rotating rod to rotate. The outer rotating rod drives the lifting frame and the closed ejector plate to descend. The descent of the lifting frame drives the lower ejector column and the descending rack to descend. The descending rack contacts the rotating gear, driving the rotating gear and the rotating seat to rotate ninety degrees in a vertical state, and the stainless steel pipe clamped by the upper and lower clamps is also turned to a vertical state. At this time, the lower ejector column contacts the stainless steel pipe clamped by the upper and lower clamps. At this time, the lower ejector column pushes the stainless steel pipe to the tube seat under the rotating seat, and the closed ejector plate descends. The stainless steel pipe in contact with the closed ejector plate rolls out and is located between the feed box and the upper clamp. Then the rotating rod continues to rotate to drive the outer rotating rod to rise, thereby driving the lifting frame and the descending rack to rise. The descending rack drives the rotating gear and the rotating seat to rotate ninety degrees. At this time, the upper and lower clamps rotate to a horizontal state. Then the closed ejector plate rises, and the stainless steel pipe between the feed box and the upper clamp is pushed into the upper and lower clamps through the slope. The upper and lower clamps are also provided with slopes. The upper and lower clamps will be lifted up by the stainless steel pipe, and the torsion spring will be twisted. When the stainless steel pipe enters between the upper and lower clamps, the torsion spring rebounds, clamps the stainless steel pipe through the upper and lower clamps, and at the same time, the ejector plate is closed to reclose the feed box.

[0007] Furthermore, the conveying device includes a transmission motor, two transmission wheels are rotatably installed on the transmission frame, a motor gear is fixedly installed on the motor shaft of the transmission motor, a left gear is rotatably installed on the transmission frame, a rear gear is fixedly installed on the left gear, a transmission belt is wrapped around the rear gear and the turntable gear, a right gear and a half-tooth gear are rotatably installed on the transmission frame, a docking gear is fixedly installed on the half-tooth gear, the docking gear is meshed with the motor gear, the half-tooth gear cooperates with the left gear, and the half-tooth gear cooperates with the right gear, an eccentric push rod is rotatably installed on the transmission frame, a lower gear is fixedly installed on the eccentric push rod, the lower gear is meshed with the right gear, a conveyor belt is wrapped around the two transmission wheels and the right gear, and a number of pipe seats are fixedly installed on the conveyor belt.

[0008] Furthermore, a sand feeding mechanism is provided on the transmission frame, and the sand feeding mechanism includes a sand feeding box fixedly installed on the transmission frame, a sand outlet plate is slidably installed on the sand feeding box, an inner push frame is fixedly installed on the sand outlet plate, a sand outlet is provided on the sand feeding box, the sand feeding box is filled with sand, a sand outlet hole is provided on the sand outlet plate, and a return spring is provided between the inner push frame and the sand feeding box.

[0009] Furthermore, an unlocking mechanism is provided on the inner push frame, and the unlocking mechanism includes an outer push frame fixedly installed on the inner push frame, an outer push track is fixedly installed on the transmission frame, the outer push track is slidably installed with the transmission frame, an outer push spring is provided between the outer push frame and the outer push track, left and right trapezoidal blocks are slidably installed on the outer push frame, and left and right springs are provided between the left and right trapezoidal blocks and the outer push frame.

[0010] Furthermore, a capping mechanism is provided on the transmission frame, and the capping mechanism includes a cover-introducing frame slidably mounted on the transmission frame, a fixed trapezoidal block is fixedly mounted on the cover-introducing frame, the cover-introducing frame cooperates with an eccentric push rod, a cover-introducing box is fixedly mounted on the transmission frame, the cover-introducing frame and the cover-introducing box are slidably mounted, a capping column is fixedly mounted on the cover-introducing frame, a capping spring is provided between the cover-introducing frame and the cover-introducing box, a slope is provided in the cover-introducing box, the tube cover is put into the cover-introducing box, and after the tube cover is put into the cover-introducing box, it is located below the capping column, and in the initial state, the capping spring is in a compressed state, and the left and right trapezoidal blocks are located below the fixed trapezoidal block.

[0011] The rotation of the transmission motor drives the motor gear to rotate, thereby driving the docking gear and the half-tooth gear to rotate. The half-tooth gear drives the left gear and the rear gear to rotate. When the half-tooth gear is engaged with the left gear, the half-tooth gear is not engaged with the right gear. When the half-tooth gear is engaged with the right gear, the half-tooth gear is not engaged with the left gear. When the half-tooth gear is engaged with the right gear, it drives the right gear to rotate, thereby driving the lower gear and the eccentric push rod to rotate. The rotation of the right gear drives the conveyor belt to move, thereby driving the pipe seat to move. The pipe seat drives the stainless steel pipe to move. When the pipe seat carries the stainless steel After the tube contacts the inner push frame, the stainless steel tube pushes the inner push frame and the docking sand outlet plate to slide along the sand inlet box, and the return spring is compressed. At this time, the sand outlet on the docking sand outlet plate is aligned with the sand outlet, and the half-tooth gear is just disengaged from the right gear. At this time, the conveyor belt and the tube seat do not move, and the sand in the sand inlet box passes through the sand outlet and the sand outlet of the docking sand outlet plate and falls into the stainless steel tube just below the sand outlet. When the inner push frame is pushed, it will push the outer push frame to slide along the outer push track, and the outer push spring is compressed, thereby driving the left and right trapezoidal blocks to leave the fixed trapezoidal The left and right trapezoidal blocks are under the block. When the left and right trapezoidal blocks leave the bottom of the fixed trapezoidal block, the cover spring that was originally in a compressed state rebounds, driving the cover feeding frame and the cover pressing column to descend, and the pipe cover is pressed into the previous stainless steel pipe that has been filled with sand through the cover pressing column. At this time, the eccentric push rod is at the bottom, and when the stainless steel pipe is separated from the inner push frame, the return spring rebounds, driving the left and right trapezoidal blocks to return. At this time, the fixed trapezoidal block is under the left and right trapezoidal blocks, and then the half-tooth gear begins to mesh with the left gear, driving the rear gear to rotate, placing the next stainless steel pipe on the pipe seat ... The toothed gear disengages from the left gear, and the half-toothed gear continues to drive the right gear to rotate, and the right gear continues to drive the conveyor belt to rotate. At the same time, the lower gear and the eccentric push rod rotate to lift the cover feeding frame, thereby driving the cover feeding frame and the fixed trapezoidal block to rise. When the fixed trapezoidal block rises, it will compress the cover pressing spring, and the fixed trapezoidal block will push the left and right trapezoidal blocks outward, and the left and right springs are compressed. When the fixed trapezoidal block passes through the left and right trapezoidal blocks, the left and right springs rebound, and the left and right trapezoidal blocks reach under the fixed trapezoidal block, so that the fixed trapezoidal block returns to the initial state, and the cover pressing spring returns to the compressed state.

[0012] Furthermore, the bending device includes an electric cylinder fixedly mounted on an electric cylinder frame, a push plate and a short bending block are slidably mounted on the electric cylinder frame, a push plate spring is arranged between the short bending block and the push plate, and a lower rack is fixedly mounted on the push plate.

[0013] Furthermore, a bending frame is fixedly installed on the transmission frame, a long bending frame is slidably installed on the bending frame, a transfer gear is rotatably installed on the bending frame, a bending rack is fixedly installed on the long bending frame, the bending rack is meshed with the transfer gear, and the lower rack is meshed with the transfer gear.

[0014] When the pipe holder with the stainless steel pipe filled with sand and pipe cover arrives between the short bending block and the long bending frame, the half-tooth gear disengages from the right gear, the electric cylinder extends to drive the push plate to slide along the electric cylinder frame, and the electric cylinder frame slides along the electric cylinder frame with the short bending block through the push plate spring. The short bending block contacts the stainless steel pipe, and the movement of the push plate will drive the lower rack to move, thereby driving the transfer gear to rotate, and the transfer gear drives the bending rack and the long bending frame to slide toward the stainless steel pipe. As the push plate continues to move forward, the push plate spring will be compressed, and the stainless steel pipe will be bent through the long bending frame and the short bending block.

[0015] When the half-tooth gear is meshed with the left gear, the conveyor belt does not move, and the torsion spring pushes the stainless steel pipe downward onto the turntable gear. At the same time, the ejector plate is closed to push the next steel pipe into the upper and lower clamps, and the sand in the sand inlet box enters the stainless steel pipe below the sand outlet. At the same time, the capping column pushes the pipe cover into the stainless steel pipe below it, and at the same time, the long bending frame and the short bending block bend the stainless steel pipe located between the long bending frame and the short bending block; when the half-tooth gear is meshed with the right gear, the conveyor belt drives the pipe seat to move, and at the same time, the eccentric push rod drives the cover inlet frame to rise and reset.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) the tube feeding device provided in the present invention can feed one stainless steel tube at a time, and automatically adjust the posture of the stainless steel tube before inserting the stainless steel tube into the tube seat. The whole process is coordinated with the subsequent stainless steel tube bending process, and the degree of automation is high; (2) the conveying device provided in the present invention can drive the stainless steel tube for conveying, and realize automatic sand injection, capping and bending of the stainless steel tube. All processes are carried out synchronously. When the operation is performed, the conveyor belt stops rotating, and the degree of automation is high; (3) the bending device provided in the present invention bends the stainless steel tube by driving the short bending block and the long bending block to move toward the stainless steel tube at the same time, and the sand and the cap are already installed inside the stainless steel tube before the stainless steel tube is bent, so as to reduce the deformation of the stainless steel tube during bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The structure of the pipe inlet device of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure of the pipe inlet device of the present invention is shown in FIG. Figure 2 ; Figure 4 For the present invention Figure 3 A local enlarged schematic diagram of the middle A; Figure 5 The structure of the conveying device of the present invention is shown in FIG. Figure 1 ; Figure 6 The structure of the conveying device of the present invention is shown in FIG. Figure 2 ; Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram of point B in the middle; Figure 8 This is a schematic diagram of the structure of the sand feeding mechanism of the present invention; Fig. 9 The structure of the conveying device of the present invention is shown in FIG. Figure 3 ; Fig.10 The bending device structure of the present invention is shown in FIG. Figure 1 ; Fig.11 The bending device structure of the present invention is shown in FIG. Figure 2 .

[0018] Figure numerals: 101-feeding box; 102-lifting frame; 103-lower ejector column; 104-descending rack; 105-turntable gear; 106-rotating rod; 107-outer rotating rod; 108-transmission belt; 109-rotating seat; 110-rotating gear; 111-upper clamp; 112-lower clamp; 113-torsion spring; 114-closing ejector plate; 201-transmission frame; 202-transmission motor; 203-transmission wheel; 204-conveyor belt; 205-tube seat; 206-sand feeding box; 207-cover feeding box; 208-cover feeding frame; 209-capping column; 210-capping spring; 211-tube cover; 212-inner push frame; 213-jointing sand discharging plate ;214-sand outlet;215-return spring;216-motor gear;217-docking gear;218-half-tooth gear;219-left gear;220-rear gear;221-right gear;222-lower gear;223-eccentric push rod;224-fixed trapezoidal block;225-external push frame;226-external push track;227-external push spring;228-left and right trapezoidal blocks;229-left and right springs;301-electric cylinder frame;302-electric cylinder;303-push plate;304-push plate spring;305-short bending block;306-bending frame;307-long bending frame;308-bending rack;309-transfer gear;310-lower rack. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Example: Reference Figure 1-Figure 11 A stainless steel pipe automatic bending device includes a pipe feeding device, the pipe feeding device includes a feeding box 101, a conveying device is arranged on the pipe feeding device, the conveying device includes a transmission frame 201, the conveying device is used to drive the stainless steel pipe to move, and a bending device is arranged on the conveying device, the bending device includes an electric cylinder frame 301, the electric cylinder frame 301 is fixedly installed on the transmission frame 201, and the bending device is used to bend the stainless steel pipe.

[0021] like Figure 2-Figure 4 As shown, the pipe feeding device includes a lifting frame 102 slidably mounted on a feed box 101, an inclined surface is arranged inside the feed box 101, a turntable gear 105 is rotatably mounted on the feed box 101, a rotating rod 106 is fixedly mounted on the turntable gear 105, a transmission belt 108 is wound around the outside of the turntable gear 105, an outer rotating rod 107 is rotatably mounted on the rotating rod 106, the outer rotating rod 107 is rotatably mounted with the lifting frame 102, a closing ejection plate 114 is fixedly mounted on the lifting frame 102, and a lower ejector column 103 and a descending rack 104 are fixedly mounted on the lifting frame 102.

[0022] like Figure 2-Figure 4 As shown, a clamping mechanism is provided on the transmission frame 201, and the clamping mechanism includes a rotating seat 109 rotatably mounted on the transmission frame 201, a rotating gear 110 is fixedly mounted on the rotating seat 109, an upper clamp 111 and a lower clamp 112 are rotatably mounted on the rotating seat 109, rubber pads are provided in the lower clamp 112, and a torsion spring 113 is provided between the upper clamp 111 and the lower clamp 112 and the rotating seat 109 respectively.

[0023] The stainless steel pipe to be bent is placed in the feed box 101, and the feed box 101 rolls toward the closed ejector plate 114 through the inclined surface in the feed box 101, and is blocked by the closed ejector plate 114. The rear gear 220 drives the turntable gear 105 and the rotating rod 106 to rotate through the transmission belt 108, thereby driving the outer rotating rod 107 to rotate, and the outer rotating rod 107 drives the lifting frame 102 and the closed ejector plate 114 to descend, and the lifting frame 102 descends to drive the lower ejector column 103 and the descending rack 107. 04 descends, the descending rack 104 contacts the rotating gear 110, driving the rotating gear 110 and the rotating seat 109 to rotate 90 degrees to a vertical state, and the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 also turns to a vertical state. At this time, the lower ejector column 103 contacts the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112. At this time, the lower ejector column 103 pushes the stainless steel pipe to the pipe seat 205 below the rotating seat 109, and the ejector plate 114 is closed and descends. The stainless steel pipe in contact with the closed ejector plate 114 rolls out and is located between the feed box 101 and the upper clamp 111. Then the rotating rod 106 continues to rotate to drive the outer rotating rod 107 to rise, thereby driving the lifting frame 102 and the descending rack 104 to rise. The descending rack 104 drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees. At this time, the upper clamp 111 and the lower clamp 112 rotate to a horizontal state, and then the closed ejector plate 114 rises, and the feed box 101 is lifted through the slope. 01 and the upper clamp 111 are pushed into the upper clamp 111 and the lower clamp 112. The upper clamp 111 and the lower clamp 112 are also provided with slopes. The upper clamp 111 and the lower clamp 112 will be lifted up by the stainless steel pipe, and the torsion spring 113 will be twisted. When the stainless steel pipe enters between the upper clamp 111 and the lower clamp 112, the torsion spring 113 rebounds and clamps the stainless steel pipe through the upper clamp 111 and the lower clamp 112. At the same time, the ejector plate 114 is closed to reclose the feed box 101.

[0024] like Figure 5-Figure 9 As shown, the conveying device includes a transmission motor 202, two transmission wheels 203 are rotatably mounted on the transmission frame 201, a motor gear 216 is fixedly mounted on the motor shaft of the transmission motor 202, a left gear 219 is rotatably mounted on the transmission frame 201, a rear gear 220 is fixedly mounted on the left gear 219, a transmission belt 108 is wound around the rear gear 220 and the turntable gear 105, a right gear 221 and a half-tooth gear 218 are rotatably mounted on the transmission frame 201, and a half-tooth gear 218 is fixedly mounted on the half-tooth gear 218. A docking gear 217 is installed, the docking gear 217 is meshed with the motor gear 216, the half-toothed gear 218 cooperates with the left gear 219, the half-toothed gear 218 cooperates with the right gear 221, an eccentric push rod 223 is rotatably installed on the transmission frame 201, a lower gear 222 is fixedly installed on the eccentric push rod 223, the lower gear 222 is meshed with the right gear 221, a conveyor belt 204 is wrapped around the two transmission wheels 203 and the right gear 221, and a plurality of pipe seats 205 are fixedly installed on the conveyor belt 204.

[0025] like Figure 5-Figure 9 As shown, a sand feeding mechanism is provided on the transmission frame 201, and the sand feeding mechanism includes a sand feeding box 206 fixedly installed on the transmission frame 201, a sand outlet plate 213 is slidably installed on the sand feeding box 206, an inner push frame 212 is fixedly installed on the sand outlet plate 213, a sand outlet 214 is provided on the sand feeding box 206, the sand feeding box 206 is filled with sand, a sand outlet hole is provided on the sand outlet plate 213, and a return spring 215 is provided between the inner push frame 212 and the sand feeding box 206.

[0026] like Figure 5-Figure 9 As shown, an unlocking mechanism is provided on the inner push frame 212, and the unlocking mechanism includes an outer push frame 225 fixedly installed on the inner push frame 212, an outer push track 226 is fixedly installed on the transmission frame 201, the outer push track 226 is slidably installed with the transmission frame 201, an outer push spring 227 is provided between the outer push frame 225 and the outer push track 226, left and right trapezoidal blocks 228 are slidably installed on the outer push frame 225, and left and right springs 229 are provided between the left and right trapezoidal blocks 228 and the outer push frame 225.

[0027] like Figure 5-Figure 9 As shown, a capping mechanism is provided on the transmission frame 201, and the capping mechanism includes a cap feeding frame 208 slidably mounted on the transmission frame 201, a fixed trapezoidal block 224 is fixedly mounted on the cap feeding frame 208, the cap feeding frame 208 cooperates with the eccentric push rod 223, a cap feeding box 207 is fixedly mounted on the transmission frame 201, the cap feeding frame 208 and the cap feeding box 207 are slidably mounted, a capping column 209 is fixedly mounted on the cap feeding frame 208, a capping spring 210 is provided between the cap feeding frame 208 and the cap feeding box 207, a slope is provided in the cap feeding box 207, and the tube cover 211 is put in from the cap feeding box 207. After the tube cover 211 is put in, it is located below the capping column 209, and in the initial state, the capping spring 210 is in a compressed state, and the left and right trapezoidal blocks 228 are located below the fixed trapezoidal block 224.

[0028] The transmission motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-toothed gear 218 to rotate. The half-toothed gear 218 drives the left gear 219 and the rear gear 220 to rotate. When the half-toothed gear 218 is engaged with the left gear 219, the half-toothed gear 218 is not engaged with the right gear 221. When the half-toothed gear 218 is engaged with the right gear 221, the half-toothed gear 218 is not engaged with the left gear 219. When the half-toothed gear 218 is engaged with the right gear 221, the right gear 221 is driven to rotate, thereby driving the lower gear 222 and the eccentric push rod 223 to rotate. The right gear 221 rotates to drive the conveyor belt 204 to move, thereby driving the pipe seat 205 to move. The pipe seat 205 drives the stainless steel pipe to move. After the tube seat 205 brings the stainless steel tube into contact with the inner push frame 212, the stainless steel tube pushes the inner push frame 212 and the docking sand outlet plate 213 to slide along the sand inlet box 206, and the return spring 215 is compressed. At this time, the sand outlet on the docking sand outlet plate 213 is aligned with the sand outlet 214. At this time, the half-tooth gear 218 is just disengaged from the right gear 221. At this time, the conveyor belt 204 and the tube seat 205 do not move, and the sand in the sand inlet box 206 passes through the sand outlet 214 and the sand outlet of the docking sand outlet plate 213 and falls into the stainless steel tube just below the sand outlet 214. When the inner push frame 212 is pushed, it will push the outer push frame 225 to slide along the outer push track 226, and the outer push spring 227 is compressed, thereby driving the left and right trapezoidal blocks 228. After the left and right trapezoidal blocks 228 leave the bottom of the fixed trapezoidal block 224, the cover spring 210 which was originally in a compressed state rebounds, driving the cover frame 208 and the cover column 209 to descend, and the tube cover 211 is pressed into the previous stainless steel tube that has been filled with sand through the cover column 209. At this time, the eccentric push rod 223 is at the bottom, and when the stainless steel tube is separated from the inner push frame 212, the return spring 215 rebounds, driving the left and right trapezoidal blocks 228 to return. At this time, the fixed trapezoidal block 224 is located below the left and right trapezoidal blocks 228, and then the half-toothed gear 218 starts to mesh with the left gear 219, driving the rear gear 220 to rotate, and the next stainless steel tube is placed on the tube seat 205, and then the half-toothed gear 21 8 is disengaged from the left gear 219, the half-toothed gear 218 continues to drive the right gear 221 to rotate, the right gear 221 continues to drive the conveyor belt 204 to rotate, and at the same time the lower gear 222 and the eccentric push rod 223 rotate to lift the cover feed frame 208, thereby driving the cover feed frame 208 and the fixed trapezoidal block 224 to rise. When the fixed trapezoidal block 224 rises, it will compress the cover pressure spring 210, and the fixed trapezoidal block 224 will push the left and right trapezoidal blocks 228 outward, and the left and right springs 229 are compressed. When the fixed trapezoidal block 224 passes through the left and right trapezoidal blocks 228, the left and right springs 229 rebound, and the left and right trapezoidal blocks 228 arrive below the fixed trapezoidal block 224, so that the fixed trapezoidal block 224 returns to its initial state, and the cover pressure spring 210 returns to a compressed state.

[0029] like Fig.10 , Fig.11 As shown, the bending device includes an electric cylinder 302 fixedly mounted on an electric cylinder frame 301, a push plate 303 and a short bending block 305 are slidably mounted on the electric cylinder frame 301, a push plate spring 304 is arranged between the short bending block 305 and the push plate 303, and a lower rack 310 is fixedly mounted on the push plate 303.

[0030] like Fig.10 , Fig.11 As shown, a bending frame 306 is fixedly installed on the transmission frame 201, a long bending frame 307 is slidably installed on the bending frame 306, a transfer gear 309 is rotatably installed on the bending frame 306, a bending rack 308 is fixedly installed on the long bending frame 307, the bending rack 308 is meshed with the transfer gear 309, and the lower rack 310 is meshed with the transfer gear 309.

[0031] When the pipe seat 205 with the stainless steel pipe filled with sand and the pipe cover 211 arrives between the short bending block 305 and the long bending frame 307, the half-tooth gear 218 is disengaged from the right gear 221, and the electric cylinder 302 extends to drive the push plate 303 to slide along the electric cylinder frame 301, and the electric cylinder frame 301 slides along the electric cylinder frame 301 with the short bending block 305 through the push plate spring 304, and the short bending block 305 contacts the stainless steel pipe. At the same time, the movement of the push plate 303 will drive the lower rack 310 to move, thereby driving the transfer gear 309 to rotate, and the transfer gear 309 drives the bending rack 308 and the long bending frame 307 to slide toward the stainless steel pipe. As the push plate 303 continues to move forward, the push plate spring 304 will be compressed, and the stainless steel pipe will be bent through the long bending frame 307 and the short bending block 305.

[0032] When the half-toothed gear 218 is meshed with the left gear 219, the conveyor belt 204 does not move, the torsion spring 113 pushes the stainless steel pipe downward onto the turntable gear 105, and at the same time, the ejector plate 114 is closed to push the next steel pipe into the upper clamp 111 and the lower clamp 112, and the sand in the sand inlet box 206 enters the stainless steel pipe below the sand outlet 214, and at the same time, the pressure cover column 209 pushes the pipe cover 211 into the stainless steel pipe below it, and at the same time, the long bending frame 307 and the short bending block 305 bend the stainless steel pipe located between the long bending frame 307 and the short bending block 305; when the half-toothed gear 218 is meshed with the right gear 221, the conveyor belt 204 drives the pipe seat 205 to move, and at the same time, the eccentric push rod 223 drives the cover inlet frame 208 to rise and reset.

[0033] The working principle of the automatic bending device for stainless steel pipes disclosed in the present invention is as follows: the stainless steel pipe to be bent is placed in the feed box 101, the feed box 101 rolls toward the closed ejection plate 114 through the inclined surface in the feed box 101, and is blocked by the closed ejection plate 114, the transmission motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-tooth gear 218 to rotate, the half-tooth gear 218 drives the left gear 219 and the rear gear 220 to rotate, and the rear gear 220 drives the turntable gear 105 through the transmission belt 108 The outer rotating rod 107 is driven to rotate, and the outer rotating rod 107 drives the lifting frame 102 and the closing ejector plate 114 to descend. The lowering of the lifting frame 102 drives the lower ejector column 103 and the descending rack 104 to descend. The descending rack 104 contacts the rotating gear 110, drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees to a vertical state, and the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 is also turned to a vertical state. At this time, the lower ejector column 103 and the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 are The lower push column 103 pushes the stainless steel pipe onto the pipe seat 205 below the rotating seat 109. At this time, the closed ejector plate 114 descends, so that the stainless steel pipe in contact with the closed ejector plate 114 rolls out and is located between the feed box 101 and the upper clamp 111. Then the rotating rod 106 continues to rotate to drive the outer rotating rod 107 to rise, thereby driving the lifting frame 102 and the descending rack 104 to rise. The descending rack 104 drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees. At this time, the upper clamp 111 and the lower clamp 112 rotate to a horizontal state. The ejector plate 114 is then closed and raised, and the stainless steel tube between the feed box 101 and the upper clamp 111 is pushed into the upper clamp 111 and the lower clamp 112 through the slope. The upper clamp 111 and the lower clamp 112 are also provided with slopes. The upper clamp 111 and the lower clamp 112 will be lifted up by the stainless steel tube, and the torsion spring 113 is twisted. When the stainless steel tube enters between the upper clamp 111 and the lower clamp 112, the torsion spring 113 rebounds, and the stainless steel tube is clamped by the upper clamp 111 and the lower clamp 112. At the same time, the ejector plate 114 is closed to reclose the feed box 101.The transmission motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-toothed gear 218 to rotate. The half-toothed gear 218 drives the left gear 219 and the rear gear 220 to rotate. When the half-toothed gear 218 is engaged with the left gear 219, the half-toothed gear 218 is not engaged with the right gear 221. When the half-toothed gear 218 is engaged with the right gear 221, the half-toothed gear 218 is not engaged with the left gear 219. When the half-toothed gear 218 is engaged with the right gear 221, the right gear 221 is driven to rotate, thereby driving the lower gear 222 and the eccentric push rod 223 to rotate. The right gear 221 rotates to drive the conveyor belt 204 to move, thereby driving the pipe seat 205 to move. The pipe seat 205 drives the stainless steel pipe to move. After the tube seat 205 brings the stainless steel tube into contact with the inner push frame 212, the stainless steel tube pushes the inner push frame 212 and the docking sand outlet plate 213 to slide along the sand inlet box 206, and the return spring 215 is compressed. At this time, the sand outlet on the docking sand outlet plate 213 is aligned with the sand outlet 214. At this time, the half-tooth gear 218 is just disengaged from the right gear 221. At this time, the conveyor belt 204 and the tube seat 205 do not move, and the sand in the sand inlet box 206 passes through the sand outlet 214 and the sand outlet of the docking sand outlet plate 213 and falls into the stainless steel tube just below the sand outlet 214. When the inner push frame 212 is pushed, it will push the outer push frame 225 to slide along the outer push track 226, and the outer push spring 227 is compressed, thereby driving the left and right trapezoidal blocks 228. After the left and right trapezoidal blocks 228 leave the bottom of the fixed trapezoidal block 224, the cover spring 210 which was originally in a compressed state rebounds, driving the cover frame 208 and the cover column 209 to descend, and the tube cover 211 is pressed into the previous stainless steel tube that has been filled with sand through the cover column 209. At this time, the eccentric push rod 223 is at the bottom, and when the stainless steel tube is separated from the inner push frame 212, the return spring 215 rebounds, driving the left and right trapezoidal blocks 228 to return. At this time, the fixed trapezoidal block 224 is located below the left and right trapezoidal blocks 228, and then the half-toothed gear 218 starts to mesh with the left gear 219, driving the rear gear 220 to rotate, and the next stainless steel tube is placed on the tube seat 205, and then the half-toothed gear 21 8 is disengaged from the left gear 219, the half-toothed gear 218 continues to drive the right gear 221 to rotate, the right gear 221 continues to drive the conveyor belt 204 to rotate, and at the same time the lower gear 222 and the eccentric push rod 223 rotate to lift the cover feed frame 208, thereby driving the cover feed frame 208 and the fixed trapezoidal block 224 to rise. When the fixed trapezoidal block 224 rises, it will compress the cover pressure spring 210, and the fixed trapezoidal block 224 will push the left and right trapezoidal blocks 228 outward, and the left and right springs 229 are compressed. When the fixed trapezoidal block 224 passes through the left and right trapezoidal blocks 228, the left and right springs 229 rebound, and the left and right trapezoidal blocks 228 arrive below the fixed trapezoidal block 224, so that the fixed trapezoidal block 224 returns to its initial state, and the cover pressure spring 210 returns to a compressed state.When the pipe seat 205 with the stainless steel pipe filled with sand and the pipe cover 211 arrives between the short bending block 305 and the long bending frame 307, the half-tooth gear 218 is disengaged from the right gear 221, and the electric cylinder 302 extends to drive the push plate 303 to slide along the electric cylinder frame 301, and the electric cylinder frame 301 slides along the electric cylinder frame 301 with the short bending block 305 through the push plate spring 304, and the short bending block 305 contacts the stainless steel pipe. At the same time, the movement of the push plate 303 will drive the lower rack 310 to move, thereby driving the transfer gear 309 to rotate, and the transfer gear 309 drives the bending rack 308 and the long bending frame 307 to slide toward the stainless steel pipe. As the push plate 303 continues to move forward, the push plate spring 304 will be compressed, and the stainless steel pipe will be bent through the long bending frame 307 and the short bending block 305.

[0034] That is, when the half-toothed gear 218 is meshed with the left gear 219, the conveyor belt 204 does not move, the torsion spring 113 pushes the stainless steel pipe downward onto the turntable gear 105, and at the same time, the ejector plate 114 is closed to push the next steel pipe into the upper clamp 111 and the lower clamp 112, and the sand in the sand inlet box 206 enters the stainless steel pipe below the sand outlet 214, and at the same time, the pressure cover column 209 pushes the pipe cover 211 into the stainless steel pipe below it, and at the same time, the long bending frame 307 and the short bending block 305 bend the stainless steel pipe located between the long bending frame 307 and the short bending block 305; when the half-toothed gear 218 is meshed with the right gear 221, the conveyor belt 204 drives the pipe seat 205 to move, and at the same time, the eccentric push rod 223 drives the cover inlet frame 208 to rise and reset.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic stainless steel tube bending device, comprising a tube feeding device, characterized in that: The tube feeding device comprises a feed box (101), a conveying device is arranged on the tube feeding device, the conveying device comprises a transmission frame (201), the conveying device is used to drive the stainless steel tube to move, the conveying device is provided with a bending device, the bending device comprises an electric cylinder frame (301), the electric cylinder frame (301) is fixedly mounted on the transmission frame (201), an eccentric push rod (223) is rotatably mounted on the transmission frame (201), and the bending device is used to bend the stainless steel tube; The transmission frame (201) is provided with a sand feeding mechanism, and the sand feeding mechanism comprises a sand feeding box (206) fixedly mounted on the transmission frame (201); a sand outlet plate (213) is slidably mounted on the sand feeding box (206); an inner push frame (212) is fixedly mounted on the sand outlet plate (213); a sand outlet (214) is provided on the sand feeding box (206); the sand feeding box (206) is filled with sand; a sand outlet hole is provided on the sand outlet plate (213); and a return spring (215) is provided between the inner push frame (212) and the sand feeding box (206); The transmission frame (201) is provided with a capping mechanism, the capping mechanism comprising a capping frame (208) slidably mounted on the transmission frame (201), a fixed trapezoidal block (224) fixedly mounted on the capping frame (208), the capping frame (208) cooperating with an eccentric push rod (223), a capping box (207) fixedly mounted on the transmission frame (201), the capping frame (208) and the capping box (207) slidably mounted, a capping column (209) fixedly mounted on the capping frame (208), a capping spring (210) being arranged between the capping frame (208) and the capping box (207), a slope being arranged inside the capping box (207), the tube cap (211) being placed from the capping box (207), the tube cap (211) being located below the capping column (209) after being placed, and the capping spring (210) being in a compressed state in an initial state.

2. The automatic stainless steel pipe bending device according to claim 1, characterized in that: The pipe feeding device comprises a lifting frame (102) slidably mounted on a feed box (101), an inclined surface being arranged inside the feed box (101), a turntable gear (105) being rotatably mounted on the feed box (101), a rotating rod (106) being fixedly mounted on the turntable gear (105), a transmission belt (108) being wound around the outside of the turntable gear (105), an outer rotating rod (107) being rotatably mounted on the rotating rod (106), the outer rotating rod (107) being rotatably mounted on the lifting frame (102), a closing ejection plate (114) being fixedly mounted on the lifting frame (102), and a lower ejector column (103) and a descending rack (104) being fixedly mounted on the lifting frame (102).

3. The automatic stainless steel pipe bending device according to claim 2 is characterized in that: The transmission frame (201) is provided with a clamping mechanism, the clamping mechanism comprising a rotating seat (109) rotatably mounted on the transmission frame (201), a rotating gear (110) fixedly mounted on the rotating seat (109), an upper clamp (111) and a lower clamp (112) rotatably mounted on the rotating seat (109), rubber pads being arranged inside the lower clamp (112), and torsion springs (113) being arranged between the upper clamp (111) and the lower clamp (112) and the rotating seat (109), respectively.

4. The automatic stainless steel pipe bending device according to claim 2, characterized in that: The conveying device comprises a transmission motor (202), two transmission wheels (203) are rotatably mounted on a transmission frame (201), a motor gear (216) is fixedly mounted on the motor shaft of the transmission motor (202), a left gear (219) is rotatably mounted on the transmission frame (201), a rear gear (220) is fixedly mounted on the left gear (219), a transmission belt (108) is wound around the rear gear (220) and the turntable gear (105), a right gear (221) and a half-tooth gear (218) are rotatably mounted on the transmission frame (201), and the half-tooth gear (218) is fixedly mounted on the left gear (219). A docking gear (217) is fixedly mounted on the wheel (218), the docking gear (217) meshes with the motor gear (216), the half-toothed gear (218) cooperates with the left gear (219), the half-toothed gear (218) cooperates with the right gear (221), a lower gear (222) is fixedly mounted on the eccentric push rod (223), the lower gear (222) meshes with the right gear (221), a conveyor belt (204) is wound around the two transmission wheels (203) and the right gear (221), and a plurality of pipe seats (205) are fixedly mounted on the conveyor belt (204).

5. The automatic stainless steel pipe bending device according to claim 4 is characterized in that: The inner push frame (212) is provided with an unlocking mechanism, and the unlocking mechanism comprises an outer push frame (225) fixedly mounted on the inner push frame (212); an outer push track (226) is fixedly mounted on the transmission frame (201); the outer push track (226) and the transmission frame (201) are slidably mounted; an outer push spring (227) is arranged between the outer push frame (225) and the outer push track (226); left and right trapezoidal blocks (228) are slidably mounted on the outer push frame (225); left and right springs (229) are arranged between the left and right trapezoidal blocks (228) and the outer push frame (225); and the left and right trapezoidal blocks (228) are located below the fixed trapezoidal block (224).

6. The automatic stainless steel pipe bending device according to claim 1, characterized in that: The bending device comprises an electric cylinder (302) fixedly mounted on an electric cylinder frame (301); a push plate (303) and a short bending block (305) are slidably mounted on the electric cylinder frame (301); a push plate spring (304) is provided between the short bending block (305) and the push plate (303); and a lower rack (310) is fixedly mounted on the push plate (303).

7. The automatic stainless steel pipe bending device according to claim 6, characterized in that: A bending frame (306) is fixedly mounted on the transmission frame (201), a long bending frame (307) is slidably mounted on the bending frame (306), a transfer gear (309) is rotatably mounted on the bending frame (306), a bending rack (308) is fixedly mounted on the long bending frame (307), the bending rack (308) is meshed with the transfer gear (309), and the lower rack (310) is meshed with the transfer gear (309).

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