Seat framework circular tube bending device and bending method

Abstract

The invention relates to the technical field of circular pipe bending, and discloses a seat framework circular pipe bending device and method.The seat framework circular pipe bending device comprises two conveying lines, a machining table is arranged on the left sides of the two conveying lines, feeding assemblies are arranged on the opposite sides of the two conveying lines, and a limiting assembly is slidably connected to the machining table; a transmission assembly is arranged between the limiting assembly and the feeding assembly. An arch-shaped frame is fixedly mounted at the top of the machining table, a stamping assembly is arranged in the middle of the arch-shaped frame, and positioning assemblies are arranged on the front side and the rear side of the arch-shaped frame. The rotating shafts are driven by a motor to rotate, a row of rotating shafts are driven to rotate synchronously under the transmission action of a chain wheel and a chain, so that a rotating arm is driven to rotate, a feeding plate is driven to move along a circular path, a second clamping base upwards lifts a to-be-bent circular pipe to move leftwards and place the to-be-bent circular pipe on a first clamping base, and the to-be-bent circular pipe intermittently rotates leftwards; therefore, the purposes of keeping the feeding rhythm and keeping the bending efficiency of the round pipe stable are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of round tube bending, and in particular to a round tube bending device and a bending method for a seat frame. Background Art

[0002] The frames of some seats are composed of metal pipes, which are assembled into the frames of the seats by bending the metal pipes and welding the bent metal pipes. When bending the metal pipes, a manual bending machine, a hydraulic bending machine or a CNC bending machine is generally used.

[0003] The Chinese patent with application date: 2024-06-11, announcement number: CN118321407B discloses a bending device and method for round tube production, which relates to the technical field of round tube bending. The present invention includes a round tube and a processing platform arranged on a processing box, and also includes a positioning part and a bending part; the positioning part is arranged on the processing platform for quickly positioning the center point of the round tube; the bending part is arranged on the processing platform for realizing the rapid bending of the round tube. The advantage is that the present invention can realize the rapid multi-angle bending operation of round tubes with various diameters, and can make round tubes of different diameters always on the same center line with the bending part when bending, so that there will be no angle error when bending, and can also pressurize the inner and outer sides of the round tube for positioning and supporting and protecting against pressure when bending, which can improve the stability of the round tube bending, and avoid the inner and outer sides of the round tube from being subjected to large deformation pressure and cracking and damage when bending.

[0004] In this technical solution, multiple components need to be adjusted to position and support the round tube. The preparation time before bending is long, which makes the processing rhythm slow and the production efficiency low. It is difficult to meet the processing needs of large quantities of seat frames, so further improvements can be made. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a seat frame round tube bending device and bending method, which have the advantages of high processing efficiency and automatic calibration of the round tube position, and solve the problems of long preparation time before bending and low processing efficiency.

[0006] (II) Technical solution In order to achieve the above-mentioned purpose of high processing efficiency and automatic calibration of the position of the round tube, the present invention provides the following technical solutions: a seat frame round tube bending device, comprising two groups of conveyor lines, processing tables are arranged on the left sides of the two groups of conveyor lines, feeding components are arranged on the opposite sides of the two groups of conveyor lines, a limiting component is slidably connected on the processing table, and a transmission component is arranged between the limiting component and the feeding component; an arch frame is fixedly installed on the top of the processing table, a stamping component is arranged in the middle of the arch frame, positioning components are arranged on the front and rear sides of the arch frame, and a loosening component is arranged between the limiting component and the processing table.

[0007] Preferably, each group of the conveyor lines includes a support frame, a pallet is fixedly mounted on the upper side of the support frame, the pallet cross-section is L-shaped, and a holder is arrayed on the horizontal part of the pallet, each of the holders is composed of two pads, and the pad cross-section is semicircular.

[0008] Preferably, an extension plate is embedded in the middle of the processing table, and the extension plate extends between the left ends of the two support plates. A boss is fixedly installed on the top of the right end of the extension plate. Two guide grooves are penetrated on the extension plate, and the two guide grooves are distributed front and back. An avoidance groove is penetrated on the left half of the extension plate, and the avoidance groove is located between the two guide grooves. Two slide grooves are provided on the top of the extension plate, and the two slide grooves are located between the two guide grooves, and the slide groove penetrates the avoidance groove.

[0009] Preferably, each group of the feeding components includes a row of rotating shafts rotatably connected under the support plate, a rotating arm is fixedly mounted on one end of the rotating shaft, a feeding plate is hingedly mounted on the end of the rotating arm away from the rotating shaft, the cross-section of the feeding plate is an inverted L-shape, and a card seat two is arranged in an array on the top of the feeding plate, each of the card seat two is composed of two pads, and the cross-section of the pad is semicircular; a sprocket is fixedly mounted on the other end of the rotating shaft, the sprockets are connected by a chain, and the rotating shaft on the far left is fixedly mounted with a motor.

[0010] Preferably, the limiting assembly includes two pads, the two pads are distributed front and back, a sliding column is fixedly installed at the bottom of each pad, two clamping plates are fixedly installed on the top of the two pads, the two clamping plates are distributed left and right, the upper half of the clamping plates are inclined, and the upper half of the two clamping plates are inclined toward opposite sides, and a supporting column is rotatably connected between the front and rear ends of the two clamping plates; the sliding column is slidably connected to the guide groove, and a connecting plate is fixedly installed between the bottom ends of the two sliding columns.

[0011] Preferably, the transmission assembly includes a slide rail, a transverse seat is slidably connected inside the slide rail, four groups of sleeves are fixedly installed on the top of the transverse seat, and the top of the sleeve is slidably connected to an insertion rod, and the four groups of insertion rods are respectively fixed on the bottom of two feeding plates; a support is provided at the left end of the slide rail, and a gear is rotatably connected to the support, a rack plate 1 is fixedly installed on the top of the transverse seat, and the rack plate 1 is meshed with the bottom of the gear, and a rack plate 2 is fixedly installed on the bottom of the connecting plate, and the rack plate 2 is meshed with the top of the gear.

[0012] Preferably, the stamping assembly includes a hydraulic cylinder fixedly installed at the top center of the arch frame, the output end of the hydraulic cylinder passes through the arch frame, and a stamping head is fixedly installed at the bottom of the output end of the hydraulic cylinder. The stamping head is located directly above the avoidance groove. The stamping head is an isosceles right triangle when viewed from the left, and the bottom is an arc-shaped transition. Both sides of the stamping head are provided with embedding grooves, and the cross-section of the embedding groove is semicircular.

[0013] Preferably, the left and right sides of the arch frame are penetrated with slots; the positioning assembly includes a vertical plate inserted in the slot, the vertical plate is located at one end of the outer side of the arch frame and is fixedly installed with an outer baffle, the vertical plate is located at one end of the inner side of the arch frame and is fixedly installed with an inner baffle, a spring is fixedly installed between the outer baffle and the arch frame, two vertical slots are penetrated by the inner baffle, the upper half of the vertical plate is penetrated with a V-shaped groove, the lower half of the vertical plate is penetrated with a straight groove, the bottom end of the V-shaped groove is connected with the top of the straight groove; the positioning assembly also includes a U-shaped plate that penetrates and is slidably connected to the middle part of the arch frame, the middle part of the U-shaped plate is fixedly installed on the bottom output end of the hydraulic cylinder, both ends of the U-shaped plate are fixedly installed with L-shaped plates, the L-shaped plate is in an inverted L-shape, the vertical part of the L-shaped plate penetrates and is slidably connected to the arch frame, and two fixed plates are fixedly installed at the bottom end of each of the L-shaped plates, the two fixed plates are respectively slidably connected in the vertical slots, and a roller is fixedly installed between the two fixed plates, and the roller is slidably connected in the V-shaped groove and the straight groove.

[0014] Preferably, the loosening assembly includes an E-shaped plate, the height of the E-shaped plate is equal to the height of the pad block, the E-shaped plate has three splines, the E-shaped plate is E-shaped when viewed from above, each spline is provided with an inclined surface at the top, and the length of the middle spline is less than the length of the splines on both sides; a slide bar is fixedly installed at the bottom of the splines on both sides, and the two slide bars are slidably connected in two slide grooves respectively, a tension spring is fixedly installed on the right side of the E-shaped plate, and the tension spring is fixedly installed on the boss at one end away from the E-shaped plate, and a steel wire rope is fixedly installed on the left end of the two slide bars, and threading holes are provided in the extension plate and the processing table, and the steel wire rope passes through the threading holes, and two guide tubes are fixedly installed on the top of the arch frame, the steel wire rope penetrates and is slidably connected to the horizontal part of the arch frame, the steel wire rope passes through the guide tube, and the top of the steel wire rope is fixedly installed on the horizontal part of the L-shaped plate.

[0015] The bending method of the seat frame round tube bending device has the following specific steps: S1. The motor drives the rotating shaft to rotate, and cooperates with the transmission of the sprocket and the chain to drive a row of rotating shafts to rotate synchronously, thereby driving the rotating arm to rotate, and driving the feeding plate to move along the circular path. In this process, the second clamping seat lifts the round tube to be bent upward and moves it to the left, and places it on the first clamping seat, so that the round tube to be bent is intermittently transferred to the left; S2. When the feeding plate moves along the circular path, the insertion rod moves up and down relative to the sleeve, and drives the sleeve and the transverse seat to move back and forth left and right. Then, through the transmission action of the rack plate 1, the gear and the rack plate 2, the connecting plate is driven to move back and forth left and right, and the movement direction of the connecting plate is opposite to that of the transverse seat. Through the connection action of the sliding column, the cushion block and the clamping plate move synchronously with the connecting plate. When the cushion block and the clamping plate move to the rightmost side of their travel, the feeding plate transfers the round tube to be bent to between the two clamping plates, and the two supporting columns lift the round tube to be bent. S3, when the sliding column moves to the left along the guide groove, the round tube to be bent moves to the left synchronously. When the round tube to be bent moves to the top of the avoidance groove, the motor stops driving the rotating shaft to rotate, and then extends through the output end of the hydraulic cylinder to drive the U-shaped plate and the L-shaped plate to move downward. During the sliding process of the roller in the V-shaped groove, the vertical plate is driven to slide first into the arch frame, and then to slide out of the arch frame. The round tube to be bent is clamped from both sides by two inner baffles, and the round tube to be bent is pushed to move, so that the middle of the round tube to be bent is directly below the punch head; S4, the output end of the hydraulic cylinder continues to extend, the U-shaped plate and the L-shaped plate continue to move downward, the roller slides in the linear groove, and in this process, the punch head presses the round tube downward, and the two supporting columns support the round tube, so that the round tube is bent in the middle, and the bending part of the round tube is avoided through the avoidance groove; S5. Then, the output end of the hydraulic cylinder contracts to drive the U-shaped plate and the L-shaped plate to move up, and the wire rope is pulled, thereby driving the E-shaped plate to move leftward, so that the splines on both sides of the E-shaped plate lift the bottom of the bent round tube upward, so that the bent part of the round tube moves out of the avoidance groove. As the E-shaped plate continues to move leftward, the splines in the middle of the E-shaped plate continue to lift the round tube upward.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a seat frame round tube bending device and bending method, which have the following beneficial effects: 1. The seat frame round tube bending device and bending method drive the rotating shaft to rotate through the motor, cooperate with the transmission effect of the sprocket and the chain, drive a row of rotating shafts to rotate synchronously, thereby driving the rotating arm to rotate, driving the feeding plate to move along the circular path, and in this process, the second clamping seat lifts the round tube to be bent upward and moves it to the left, and places it on the first clamping seat, so that the round tube to be bent is intermittently transferred to the left; thereby achieving the purpose of maintaining the feeding rhythm and keeping the round tube bending efficiency stable; 2. The seat frame round tube bending device and bending method, when the round tube to be bent moves to the top of the avoidance groove, the motor stops driving the rotating shaft to rotate, and then extends through the output end of the hydraulic cylinder to drive the U-shaped plate and the L-shaped plate to move downward. During the sliding process of the roller in the V-shaped groove, the vertical plate is driven to slide first into the arch frame, and then to slide out of the arch frame. The round tube to be bent is clamped from both sides by two inner baffles, and the round tube to be bent is pushed to move, so that the middle of the round tube to be bent is directly below the punch head; thereby achieving the purpose of automatically calibrating the position of the round tube; 3. The seat frame round tube bending device and bending method, through the contraction of the output end of the hydraulic cylinder, drives the U-shaped plate and the L-shaped plate to move up, pulls the wire rope, and thus drives the E-shaped plate to move leftward, so that the teeth on both sides of the E-shaped plate lift the bottom of the bent round tube upward, so that the bent part of the round tube moves out of the avoidance groove, and as the E-shaped plate continues to move to the left, the teeth in the middle of the E-shaped plate continue to lift the round tube upward, so that the bent round tube moves up a certain distance to facilitate unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a seat frame round tube bending device proposed by the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a conveyor line and a feeding assembly of a seat frame round tube bending device proposed by the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of a feeding assembly of a seat frame round tube bending device proposed by the present invention; Figure 4 A schematic diagram of the three-dimensional structure of a processing table of a seat frame round tube bending device proposed by the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of a limit assembly and an extension plate of a seat frame round tube bending device proposed by the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of a transmission assembly of a seat frame round tube bending device proposed by the present invention; Figure 7 A schematic diagram of the three-dimensional structure of an arch frame and a stamping assembly of a seat frame round tube bending device proposed by the present invention; Figure 8A schematic diagram of the three-dimensional structure of a positioning assembly of a seat frame round tube bending device proposed by the present invention; Fig. 9 A three-dimensional structural schematic diagram of a loosening assembly, a processing table and an arch frame of a seat frame round tube bending device proposed by the present invention; Fig.10 This is a schematic diagram of the three-dimensional structure of a loose component of a seat frame round tube bending device proposed by the present invention.

[0018] In the figure: 100, conveyor line; 200, processing table; 300, feeding assembly; 400, limit assembly; 500, transmission assembly; 600, arch frame; 700, stamping assembly; 800, positioning assembly; 900, loosening assembly; 101, support frame; 102, support plate; 103, holder 1; 201, extension plate; 202, boss; 203, guide groove; 204, avoidance groove; 205, slide groove; 301, rotating shaft; 302, rotating arm; 303, feeding plate; 304, second holder; 305, sprocket; 306, chain; 307, motor; 401, pad; 402, slide column; 403, clamping plate; 404, support column; 405, connecting plate; 501, slide rail; 502, transverse seat; 503, sleeve; 504, plug rod; 505, support; 506, gear; 507, rack plate 1; 508, rack plate 2; 601, slot; 701, hydraulic cylinder; 702, punch head; 801, vertical plate; 802, outer baffle plate; 803, inner baffle plate; 804, spring; 805, vertical slot; 806, V-shaped slot; 807, linear slot; 808, U-shaped plate; 809, L-shaped plate; 810, fixed plate; 811, roller; 901, E-shaped plate; 902, sliding bar; 903, tension spring; 904, wire rope; 905, guide tube. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1A seat frame round tube bending device includes two groups of conveyor lines 100, processing tables 200 are arranged on the left sides of the two groups of conveyor lines 100, feeding components 300 are arranged on the opposite sides of the two groups of conveyor lines 100, a limiting component 400 is slidably connected to the processing table 200, and a transmission component 500 is arranged between the limiting component 400 and the feeding component 300; an arch frame 600 is fixedly installed on the top of the processing table 200, a stamping component 700 is arranged in the middle of the arch frame 600, and positioning components 800 are arranged on the front and rear sides of the arch frame 600, and a loosening component 900 is arranged between the limiting component 400 and the processing table 200.

[0021] See also Figure 2 Each group of conveyor lines 100 includes a support frame 101, a support plate 102 is fixedly installed on the upper side of the support frame 101, the cross section of the support plate 102 is L-shaped, and a clamping seat 103 is arranged in an array on the horizontal part of the support plate 102, each clamping seat 103 is composed of two pads, and the cross section of the pad is semicircular. The two ends of the round tube are supported by the two support plates 102, and the round tube is limited by the two pads to prevent the round tube from rolling on the support plate 102.

[0022] See also Figure 4-Figure 5 An extension plate 201 is embedded in the middle of the processing table 200, and the extension plate 201 extends between the left ends of the two support plates 102 and between the two feeding assemblies 300. A boss 202 is fixedly installed on the top of the right end of the extension plate 201, and two guide grooves 203 are formed through the extension plate 201, and the two guide grooves 203 are distributed front and back. An avoidance groove 204 is formed through the left half of the extension plate 201, and the avoidance groove 204 is located between the two guide grooves 203. Two slide grooves 205 are formed on the top of the extension plate 201, and the two slide grooves 205 are located between the two guide grooves 203, and the slide groove 205 passes through the avoidance groove 204.

[0023] See also Figure 2-Figure 3 Each group of feeding components 300 includes a row of rotating shafts 301 rotatably connected to the bottom of the support plate 102, and the rotating shafts 301 are arranged in an array along the length direction of the support plate 102. A rotating arm 302 is fixedly installed at one end of the rotating shaft 301, and a feeding plate 303 is hingedly connected to the end of the rotating arm 302 away from the rotating shaft 301. The cross section of the feeding plate 303 is inverted L shape, and a row of rotating arms 302 are hinged on the vertical part of the same feeding plate 303. A second card seat 304 is arranged in an array on the top of the feeding plate 303, and the array spacing of the second card seat 304 is equal to the array spacing of the first card seat 103. Each second card seat 304 is composed of two cushion columns, and the cross section of the cushion column is semicircular; a sprocket 305 is fixedly installed at the other end of the rotating shaft 301, and the sprockets 305 are connected by a chain 306. The leftmost rotating shaft 301 is fixedly installed with a motor 307.

[0024] See also Figure 5The limit assembly 400 includes two pads 401, which are attached to the top of the extension plate 201. The two pads 401 are distributed front and back, and a sliding column 402 is fixedly installed at the bottom of each pad 401. The sliding column 402 penetrates and slides and is connected to the guide groove 203. A connecting plate 405 is fixedly installed between the bottom ends of the two sliding columns 402. Thus, the pads 401 and the connecting plate 405 are clamped on the upper and lower sides of the extension plate 201.

[0025] Two clamping plates 403 are fixedly installed on the top of the two cushion blocks 401. The two clamping plates 403 are distributed left and right. The upper half of the clamping plates 403 is inclined and tilted toward the opposite side. The front and rear ends of the two clamping plates 403 are rotatably connected with support columns 404. The cushion blocks 401 and the clamping plates 403 are driven to reciprocate left and right by the sliding columns 402 along the guide grooves 203. When the two clamping plates 403 move to the far right, the round tube is transferred to between the two clamping plates 403 through the feeding plate 303.

[0026] See also Figure 6 The transmission assembly 500 includes a slide rail 501, a traverse seat 502 is slidably connected inside the slide rail 501, four sets of sleeves 503 are fixedly installed on the top of the traverse seat 502, and a plug rod 504 is slidably connected to the top of the sleeve 503. The four sets of plug rods 504 are respectively fixed to the bottom of the two feeding plates 303. Therefore, when the rotating shaft 301 rotates, the rotating arm 302 drives the feeding plate 303 to move along a circular path. In this process, the feeding plate 303 drives the plug rod 504 to move up and down relative to the sleeve 503, and at the same time, drives the traverse seat 502 to move left and right relative to the slide rail 501.

[0027] A support 505 is provided at the left end of the slide rail 501, and a gear 506 is rotatably connected to the support 505. A rack plate 1 507 is fixedly installed on the top of the transverse seat 502, and the rack plate 1 507 is meshed with the bottom of the gear 506. A rack plate 2 508 is fixedly installed on the bottom of the connecting plate 405, and the rack plate 2 508 is meshed with the top of the gear 506. Through the transmission effect of the rack plate 2 508, the rack plate 1 507 and the gear 506, when the transverse seat 502 reciprocates left and right, the connecting plate 405 is driven to reciprocate left and right, and the transverse seat 502 moves in opposite directions to the connecting plate 405. Therefore, when the feeding plate 303 moves from right to left along the annular path, the two clamping plates 403 move from left to right.

[0028] See also Figure 7The punching assembly 700 includes a hydraulic cylinder 701 fixedly mounted at the top center of the arch frame 600. The output end of the hydraulic cylinder 701 passes through the arch frame 600. A punching head 702 is fixedly mounted at the bottom of the output end of the hydraulic cylinder 701. The punching head 702 is located directly above the avoidance groove 204. The punching head 702 is an isosceles right triangle when viewed from the left, and the bottom is an arc-shaped transition. Both sides of the punching head 702 are provided with embedded grooves, and the cross-section of the embedded groove is semicircular. The thickness of the punching head 702 is equal to the spacing between the lower halves of the two clamping plates 403, and the lower halves of the two clamping plates 403 are used to clamp the round tube.

[0029] See also Figure 8-Figure 9 , slots 601 are provided on both sides of the arch frame 600. The positioning assembly 800 includes a vertical plate 801 inserted into the slot 601, and the vertical plate 801 can move left and right relative to the arch frame 600. An outer baffle 802 is fixedly installed at one end of the vertical plate 801 located on the outside of the arch frame 600, and an inner baffle 803 is fixedly installed at one end of the vertical plate 801 located on the inside of the arch frame 600. A spring 804 is fixedly installed between the outer baffle 802 and the arch frame 600, and the elasticity of the spring 804 makes the outer baffle 802 have a tendency to move away from the arch frame 600.

[0030] Two vertical grooves 805 are formed through the inner baffle 803, and a V-shaped groove 806 is formed through the upper half of the vertical plate 801. The V-shaped groove 806 is V-shaped, and the tip thereof faces the vertical portion of the arch frame 600. A linear groove 807 is formed through the lower half of the vertical plate 801. The linear groove 807 is linear, and the bottom end of the V-shaped groove 806 is connected to the top end of the linear groove 807.

[0031] The positioning assembly 800 also includes a U-shaped plate 808 that passes through and is slidably connected to the middle part of the arch frame 600. The middle part of the U-shaped plate 808 is fixedly installed on the bottom output end of the hydraulic cylinder 701. L-shaped plates 809 are fixedly installed at both ends of the U-shaped plate 808. The L-shaped plate 809 is in an inverted L shape. The vertical part of the L-shaped plate 809 passes through and is slidably connected to the arch frame 600, and the bottom end of the L-shaped plate 809 is higher than the bottom of the U-shaped plate 808.

[0032] Two fixing plates 810 are fixedly installed at the bottom end of each L-shaped plate 809 . The two fixing plates 810 are respectively slidably connected in the vertical groove 805 . A roller 811 is fixedly installed between the two fixing plates 810 . The roller 811 is slidably connected in the V-shaped groove 806 and the linear groove 807 .

[0033] See also Figure 9-10The loosening assembly 900 includes an E-shaped plate 901, the height of the E-shaped plate 901 is equal to the height of the cushion block 401, the E-shaped plate 901 has three prongs, and the E-shaped plate 901 is E-shaped when viewed from above, and each prong is provided with an inclined surface at the top, and the length of the middle prong is less than the length of the prongs on both sides. Slide bars 902 are fixedly installed at the bottom of the prongs on both sides, and the two slide bars 902 are respectively slidably connected in the two slide grooves 205. A tension spring 903 is fixedly installed on the right side of the E-shaped plate 901, and the end of the tension spring 903 away from the E-shaped plate 901 is fixedly installed on the boss 202. Through the tension of the tension spring 903, the E-shaped plate 901 has a tendency to move to the right.

[0034] A steel wire rope 904 is fixedly installed at the left end of each of the two slide bars 902. Threading holes are provided in the extension plate 201 and the processing table 200, and the steel wire rope 904 passes through the threading holes. Two guide tubes 905 are fixedly installed on the top of the arch frame 600. Both ends of the guide tubes 905 are provided with bell mouths. The steel wire rope 904 passes through and is slidably connected to the horizontal part of the arch frame 600. The steel wire rope 904 passes through the guide tubes 905, and the top end of the steel wire rope 904 is fixedly installed on the horizontal part of the L-shaped plate 809.

[0035] When in use, the bending method of the seat frame round tube bending device comprises the following specific steps: S1. The motor 307 drives the rotating shaft 301 to rotate, and cooperates with the transmission effect of the sprocket 305 and the chain 306 to drive a row of rotating shafts 301 to rotate synchronously, thereby driving the rotating arm 302 to rotate, and driving the feeding plate 303 to move along a circular path. In this process, the second clamping seat 304 lifts the round tube to be bent upward and moves it to the left, and places it on the clamping seat 1 103, so that the round tube to be bent is intermittently transferred to the left; S2. When the feeding plate 303 moves along the circular path, the insert rod 504 moves up and down relative to the sleeve 503, and drives the sleeve 503 and the transverse displacement seat 502 to move back and forth left and right, and then drives the connecting plate 405 to move back and forth left and right through the transmission action of the rack plate 1 507, the gear 506 and the rack plate 2 508, and the movement direction of the connecting plate 405 is opposite to the movement direction of the transverse displacement seat 502. Through the connection action of the sliding column 402, the cushion block 401 and the clamping plate 403 move synchronously with the connecting plate 405, and when the cushion block 401 and the clamping plate 403 move to the rightmost side of their travel, the feeding plate 303 transfers the round tube to be bent to between the two clamping plates 403, and the two supporting columns 404 lift the round tube to be bent; S3, when the slide column 402 moves to the left along the guide groove 203, the round tube to be bent moves to the left synchronously. When the round tube to be bent moves to the top of the avoidance groove 204, the motor 307 stops driving the rotating shaft 301 to rotate, and then extends the output end of the hydraulic cylinder 701 to drive the U-shaped plate 808 and the L-shaped plate 809 to move downward. During the sliding process of the roller 811 in the V-shaped groove 806, the vertical plate 801 is driven to slide first into the arch frame 600, and then to slide out of the arch frame 600. The round tube to be bent is clamped from both sides by two inner baffles 803, and the round tube to be bent is pushed to move, so that the middle part of the round tube to be bent is directly below the punch head 702; S4, the output end of the hydraulic cylinder 701 continues to extend, the U-shaped plate 808 and the L-shaped plate 809 continue to move downward, and the roller 811 slides in the linear groove 807. During this process, the punch head 702 presses the round tube downward, and the two supporting columns 404 support the round tube, so that the round tube is bent in the middle, and the bending part of the round tube is avoided by the avoidance groove 204; S5. The output end of the hydraulic cylinder 701 contracts to drive the U-shaped plate 808 and the L-shaped plate 809 to move upward, and the wire rope 904 is pulled, thereby driving the E-shaped plate 901 to move leftward, so that the splines on both sides of the E-shaped plate 901 lift the bottom of the bent round tube upward, so that the bent part of the round tube moves out of the avoidance groove 204. As the E-shaped plate 901 continues to move leftward, the splines in the middle of the E-shaped plate 901 continue to lift the round tube upward.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seat frame round tube bending device, comprising two sets of conveyor lines (100), characterized in that: A processing table (200) is arranged on the left side of the two groups of conveyor lines (100), and a feeding assembly (300) is arranged on the opposite side of the two groups of conveyor lines (100). A limit assembly (400) is slidably connected to the processing table (200), and a transmission assembly (500) is arranged between the limit assembly (400) and the feeding assembly (300); An arch frame (600) is fixedly mounted on the top of the processing table (200), a punching assembly (700) is arranged in the middle of the arch frame (600), positioning assemblies (800) are arranged on the front and rear sides of the arch frame (600), and a loosening assembly (900) is arranged between the limiting assembly (400) and the processing table (200).

2. The seat frame round tube bending device according to claim 1, characterized in that: Each group of the conveyor lines (100) comprises a support frame (101), a support plate (102) is fixedly mounted on the upper side of the support frame (101), the cross section of the support plate (102) is L-shaped, and a card seat (103) is arranged in an array on the horizontal part of the support plate (102), each of the card seats (103) is composed of two cushion strips, and the cross section of the cushion strip is semicircular.

3. The seat frame round tube bending device according to claim 2, characterized in that: An extension plate (201) is embedded in the middle of the processing table (200), and the extension plate (201) extends between the left ends of the two support plates (102). A boss (202) is fixedly installed on the top of the right end of the extension plate (201). Two guide grooves (203) are formed through the extension plate (201), and the two guide grooves (203) are distributed front to back. An avoidance groove (204) is formed through the left half of the extension plate (201), and the avoidance groove (204) is located between the two guide grooves (203). Two slide grooves (205) are formed on the top of the extension plate (201), and the two slide grooves (205) are located between the two guide grooves (203), and the slide groove (205) passes through the avoidance groove (204).

4. The seat frame round tube bending device according to claim 2, characterized in that: Each group of the feeding components (300) comprises a row of rotating shafts (301) rotatably connected below the support plate (102); a rotating arm (302) is fixedly mounted on one end of the rotating shaft (301); a feeding plate (303) is hingedly connected to one end of the rotating arm (302) away from the rotating shaft (301); the feeding plate (303) has an inverted L-shaped cross section; a second card seat (304) is arranged in an array on the top of the feeding plate (303); each of the second card seats (304) consists of two cushion columns, and the cross section of the cushion column is semicircular; A sprocket (305) is fixedly mounted on the other end of the rotating shaft (301), and the sprockets (305) are connected via a chain (306). A motor (307) is fixedly mounted on the rotating shaft (301) on the far left.

5. The seat frame round tube bending device according to claim 3 is characterized in that: The limiting assembly (400) comprises two cushion blocks (401), the two cushion blocks (401) are distributed front and back, a sliding column (402) is fixedly installed at the bottom of each cushion block (401), two clamping plates (403) are fixedly installed on the top of the two cushion blocks (401), the two clamping plates (403) are distributed left and right, the upper halves of the clamping plates (403) are inclined, and the upper halves of the two clamping plates (403) are inclined toward opposite sides, and a supporting column (404) is rotatably connected between the front and rear ends of the two clamping plates (403); The sliding column (402) penetrates and is slidably connected to the guide groove (203), and a connecting plate (405) is fixedly installed between the bottom ends of the two sliding columns (402).

6. The seat frame round tube bending device according to claim 5, characterized in that: The transmission assembly (500) comprises a slide rail (501), a traverse seat (502) is slidably connected inside the slide rail (501), four sets of sleeves (503) are fixedly installed on the top of the traverse seat (502), and a plug rod (504) is slidably connected to the top of the sleeve (503), and the four sets of plug rods (504) are respectively fixed on the bottom of two feeding plates (303); A support (505) is provided at the left end of the slide rail (501), and a gear (506) is rotatably connected to the support (505). A rack plate 1 (507) is fixedly installed on the top of the transverse displacement seat (502), and the rack plate 1 (507) is meshed with the bottom of the gear (506). A rack plate 2 (508) is fixedly installed on the bottom of the connecting plate (405), and the rack plate 2 (508) is meshed with the top of the gear (506).

7. The seat frame round tube bending device according to claim 6, characterized in that: The punching assembly (700) comprises a hydraulic cylinder (701) fixedly mounted at the top center of the arch frame (600); the output end of the hydraulic cylinder (701) passes through the arch frame (600); a punching head (702) is fixedly mounted at the bottom of the output end of the hydraulic cylinder (701); the punching head (702) is located directly above the avoidance groove (204); the punching head (702) is an isosceles right triangle when viewed from the left, and the bottom is an arc-shaped transition; both sides of the punching head (702) are provided with embedded grooves, and the cross-section of the embedded grooves is semicircular.

8. The seat frame round tube bending device according to claim 7, characterized in that: Slots (601) are provided on both left and right sides of the arch frame (600); The positioning assembly (800) comprises a vertical plate (801) inserted into a slot (601); an outer baffle (802) is fixedly installed at one end of the vertical plate (801) located on the outside of the arch frame (600); an inner baffle (803) is fixedly installed at one end of the vertical plate (801) located on the inside of the arch frame (600); a spring (804) is fixedly installed between the outer baffle (802) and the arch frame (600); two vertical grooves (805) are penetrated through the inner baffle (803); a V-shaped groove (806) is penetrated through the upper half of the vertical plate (801); a straight groove (807) is penetrated through the lower half of the vertical plate (801); the bottom end of the V-shaped groove (806) is connected to the top end of the straight groove (807); The positioning assembly (800) further comprises a U-shaped plate (808) penetrating and slidably connected to the middle of the arch frame (600); the middle of the U-shaped plate (808) is fixedly mounted on the bottom output end of the hydraulic cylinder (701); L-shaped plates (809) are fixedly mounted on both ends of the U-shaped plate (808); the L-shaped plate (809) is in an inverted L shape; the vertical portion of the L-shaped plate (809) penetrates and slidably connected to the arch frame (600); two fixed plates (810) are fixedly mounted on the bottom end of each L-shaped plate (809); the two fixed plates (810) are respectively slidably connected in the vertical grooves (805); a roller (811) is fixedly mounted between the two fixed plates (810); the roller (811) is slidably connected in the V-shaped groove (806) and the linear groove (807).

9. The seat frame round tube bending device according to claim 8, characterized in that: The loosening assembly (900) comprises an E-shaped plate (901), the height of the E-shaped plate (901) being equal to that of the cushion block (401), the E-shaped plate (901) having three insert teeth, the E-shaped plate (901) being in an E-shape when viewed from above, the top of each insert tooth being provided with an inclined surface, and the length of the insert tooth in the middle being shorter than the length of the insert teeth at both sides; A slide bar (902) is fixedly installed at the bottom of the insert teeth on both sides, and the two slide bars (902) are respectively slidably connected in two slide grooves (205). A tension spring (903) is fixedly installed on the right side of the E-shaped plate (901), and the tension spring (903) is fixedly installed on the boss (202) at one end away from the E-shaped plate (901). A steel wire rope (904) is fixedly installed at the left end of the two slide bars (902). The extension plate (201) and the processing table (200) are provided with threading holes, and the steel wire rope (904) passes through the threading holes. Two guide tubes (905) are fixedly installed on the top of the arch frame (600), and the steel wire rope (904) passes through and is slidably connected to the horizontal part of the arch frame (600). The steel wire rope (904) passes through the guide tube (905), and the top end of the steel wire rope (904) is fixedly installed on the horizontal part of the L-shaped plate (809).

10. The seat frame round tube bending device according to any one of claims 1 to 9, characterized in that: The bending method of the seat frame round tube bending device has the following specific steps: S1. The motor (307) drives the rotating shaft (301) to rotate, and cooperates with the transmission function of the sprocket (305) and the chain (306) to drive a row of rotating shafts (301) to rotate synchronously, thereby driving the rotating arm (302) to rotate, and driving the feeding plate (303) to move along a circular path. During this process, the second clamping seat (304) lifts the round tube to be bent upward and moves it to the left, and places it on the first clamping seat (103), so that the round tube to be bent is intermittently transferred to the left; S2. When the feeding plate (303) moves along the circular path, the insert rod (504) moves up and down relative to the sleeve (503), and drives the sleeve (503) and the transverse displacement seat (502) to move back and forth left and right. Then, through the transmission action of the rack plate 1 (507), the gear (506) and the rack plate 2 (508), the connecting plate (405) is driven to move back and forth left and right, and the movement direction of the connecting plate (405) is opposite to the movement direction of the transverse displacement seat (502). Through the connection action of the sliding column (402), the cushion block (401) and the clamping plate (403) move synchronously with the connecting plate (405). When the cushion block (401) and the clamping plate (403) move to the rightmost side of their travel, the feeding plate (303) transfers the round tube to be bent to between the two clamping plates (403), and the two supporting columns (404) lift the round tube to be bent. S3, when the slide column (402) moves to the left along the guide groove (203), the round tube to be bent is driven to move to the left synchronously. When the round tube to be bent moves to the top of the avoidance groove (204), the motor (307) stops driving the rotating shaft (301) to rotate, and then the output end of the hydraulic cylinder (701) is extended to drive the U-shaped plate (808) and the L-shaped plate (809) to move downward. When the roller (811) slides in the V-shaped groove (806), the vertical plate (801) is driven to slide first into the arch frame (600) and then to slide outside the arch frame (600). The round tube to be bent is clamped from both sides by two inner baffles (803), and the round tube to be bent is pushed to move so that the middle of the round tube to be bent is directly below the punch head (702); S4, the output end of the hydraulic cylinder (701) continues to extend, the U-shaped plate (808) and the L-shaped plate (809) continue to move downward, the roller (811) slides in the linear groove (807), and during this process, the punch head (702) presses the round tube downward, and the two supporting columns (404) support the round tube, so that the round tube is bent in the middle, and the bending part of the round tube is avoided by the avoidance groove (204); S5. The output end of the hydraulic cylinder (701) is then contracted to drive the U-shaped plate (808) and the L-shaped plate (809) to move upward, thereby pulling the wire rope (904), thereby driving the E-shaped plate (901) to move leftward, so that the splines on both sides of the E-shaped plate (901) lift the bottom of the bent round tube upward, so that the bent part of the round tube moves out of the avoidance groove (204). As the E-shaped plate (901) continues to move leftward, the splines in the middle of the E-shaped plate (901) continue to lift the round tube upward.

Images