High-precision square tube straightening machine

Abstract

The utility model discloses a high-precision square tube straightening machine, which comprises a lathe bed, a fixed clamping jaw seat and a movable clamping jaw seat, two ends of a square tube to be straightened are respectively clamped on clamping jaw mechanisms on the fixed clamping jaw seat and the movable clamping jaw seat, the movable clamping jaw seat is telescopically connected to the end part of a piston rod of an oil cylinder, the oil cylinder is fixed on an oil cylinder seat, and the oil cylinder seat is fixed on the lathe bed. According to the square tube straightening machine, the straightening machine with one fixed end and the other traction end is designed for straightening a square tube, the conditions that the square tube is squared and the like cannot occur, the straightening precision and the yield of the square tube are improved, the production efficiency is improved, the production cost is reduced, and the production cost is reduced. And the purpose of straightening the square tube can be achieved through one-time straightening, and the square tube straightening device has the advantage of being high in machining efficiency.

Description

Technical Field

[0001] The utility model relates to a high-precision square tube straightening machine. Background Art

[0002] In the prior art, stainless steel square tubes are difficult to straighten due to their shape, and are mainly straightened by clamping the square tubes with two long straightening plates. This straightening method has the following disadvantages: since the square tubes are long, the corresponding straightening plates are also long, and the number of driving mechanisms for driving the straightening plates to move is limited, which will lead to uneven force on the square tubes during the straightening process, and thus lead to insufficient accuracy of the straightened square tubes; since the two straightening plates can only straighten two surfaces of the square tubes at a time, a square tube needs to be straightened twice to complete the processing, and the processing efficiency is low; the straightening equipment with this structure also has the disadvantages of easily clamping the square tubes and having a high scrap rate. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a high-precision square tube straightening machine which has high processing efficiency and is not prone to damaging the square tube.

[0004] The technical solution of the utility model is: a high-precision square tube straightening machine, comprising a bed, a fixed clamping claw seat and a movable clamping claw seat, and the two ends of the square tube to be straightened are clamped on the clamping claw mechanisms on the fixed clamping claw seat and the movable clamping claw seat respectively;

[0005] The movable claw seat is telescopically connected to the end of a piston rod of an oil cylinder, the oil cylinder is fixed on the oil cylinder seat, the oil cylinder seat is positioned on the bed, a hydraulic gauge is provided on the oil cylinder, and the fixed claw seat is fixed on a mounting seat at one end of the bed.

[0006] Furthermore, it also includes a controller, and the oil cylinder, hydraulic gauge and claw mechanism are all connected to the controller.

[0007] Furthermore, the claw mechanism includes a hydraulic cylinder, a guide seat and two claw bodies fixed on a fixed claw seat or a movable claw seat, the piston rod of the hydraulic cylinder is connected to the guide seat through a connecting rod, the guide seat has a V-shaped guide groove, and the two claw bodies are respectively arranged on both sides of the guide groove and displaced along the side walls of the guide groove.

[0008] Furthermore, the sides of the two claw bodies facing each other also have anti-slip grooves.

[0009] Furthermore, there are two connecting rods, a connecting plate is fixed to the end of the piston rod, and the two connecting rods are respectively arranged between the connecting plate and both sides of the rear end of the fixed claw seat or the movable claw seat.

[0010] Furthermore, springs are respectively sleeved on the two connecting rods.

[0011] Furthermore, a triangular limiting platform is provided on the fixed clamping claw seat and the movable clamping claw seat.

[0012] Furthermore, a rack is fixed to one end of the bed away from the mounting seat, the bottom of the oil cylinder seat has a tooth pattern corresponding to the rack, and the oil cylinder seat is clamped on the rack and fixed to the rack by bolts.

[0013] The beneficial effects of the utility model are as follows: a straightening machine with one end fixed and the other end pulled is designed for a square tube to straighten the square tube, which will not cause the square tube to be crushed, etc., thereby improving the straightening accuracy and yield rate of the square tube, and the purpose of straightening the square tube can be achieved by straightening the square tube once, which has the advantage of high processing efficiency.

[0014] A reliable clamping claw mechanism is designed to firmly clamp the two ends of the square tube and avoid deformation of the ends of the square tube during the straightening process.

[0015] The position of the oil cylinder seat is adjustable and the fixing method is reliable, which can adapt to the straightening of square tubes of various lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the clamping claw mechanism in the utility model.

[0019] In the figure: bed 1, fixed claw seat 2, movable claw seat 3, square tube 4, oil cylinder 5, cylinder seat 6, mounting seat 7, hydraulic cylinder 9, guide seat 10, claw body 11, connecting rod 12, guide groove 13, anti-slip pattern 14, connecting plate 15, spring 16, triangular limit platform 17, rack 18. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Combination Figure 1-3 As shown, a high-precision square tube straightening machine comprises a bed 1, a fixed clamping claw seat 2 and a movable clamping claw seat 3, and both ends of a square tube 4 to be straightened are clamped on the clamping claw mechanisms on the fixed clamping claw seat 2 and the movable clamping claw seat 3 respectively;

[0022] The movable claw seat 3 is telescopically connected to the end of the piston rod of a cylinder 5, and the cylinder 5 is fixed on a cylinder seat 6. The cylinder seat 6 is positioned on the bed 1. A hydraulic gauge is provided on the cylinder 5. The fixed claw seat 2 is fixed on a mounting seat 7 at one end of the bed 1.

[0023] When the above structure straightens the square tube 4, the piston rod of the oil cylinder 5 retracts, driving the movable claw seat 3 to move toward the oil cylinder 5, applying a pulling force to the square tube 4. When the value of the hydraulic gauge reaches a preset value, the piston rod of the oil cylinder 5 stops retracting and maintains the pulling force to a preset time. The square tube 4 is straightened and extended under the action of the pulling force until it is fixed.

[0024] It is worth mentioning that the extension of the square tube 4 under constant tension for a preset time can effectively eliminate the stress generated by the square tube 4 during the straightening process, and avoid the square tube 4 rebounding after being straightened, causing the straightened square tube 4 to return to the bent state again.

[0025] Since the process parameters such as the hydraulic pressure gauge value and the value of the tension holding time when straightening the square tubes 4 of different specifications can be obtained through repeated experiments, they will not be described in detail here.

[0026] In another embodiment, a controller is further included, and the oil cylinder 5, the hydraulic gauge and the claw mechanism are all connected to the controller. The controller is preset with relevant data such as straightening process parameters of square tubes 4 of different specifications to facilitate automatic control.

[0027] In another embodiment, if Figure 3 As shown, the claw mechanism includes a hydraulic cylinder 9 fixed on a fixed claw seat 2 or a movable claw seat 3, a guide seat 10 and two claw bodies 11, the piston rod of the hydraulic cylinder 9 is connected to the guide seat 10 through a connecting rod 12, and the guide seat 10 has a V-shaped guide groove 13, and the two claw bodies 11 are respectively arranged on both sides of the guide groove 13 and displaced along the side walls of the guide groove 13. When the square tube 4 is clamped, as the piston rod of the hydraulic cylinder 9 retreats, the two claw bodies 11 abut against both sides of the end of the square tube 4 and displace toward the front end of the guide groove 13, gradually locking both sides of the square tube 4, and the clamping force increases with the increase of the pulling force, which can ensure the reliability of clamping the end of the square tube 4.

[0028] In another embodiment, if Figure 3 As shown, the sides of the two claw bodies 11 facing each other also have anti-slip grooves 14.

[0029] In another embodiment, if Figure 3 As shown, there are two connecting rods 12, and a connecting plate 15 is fixed to the end of the piston rod. The two connecting rods 12 are respectively arranged between the connecting plate 15 and the two sides of the rear end of the fixed claw seat 2 or the movable claw seat 3.

[0030] In another embodiment, if Figure 3 As shown, springs 16 are respectively mounted on the two connecting rods 12, and the springs 16 mainly play a buffering role to prevent the fixed claw seat 2 or the movable claw seat 3 from rebounding and causing damage to the hydraulic cylinder 9 when the locking of the end of the other pipe 4 is released.

[0031] In another embodiment, if Figure 3 As shown, the fixed jaw seat 2 and the movable jaw seat 3 are also provided with a triangular limiting platform 17, and the triangular limiting platform 18 is used to limit the end of the steel pipe.

[0032] In another embodiment, if Figure 1 As shown, a rack 18 is fixed to one end of the bed 1 away from the mounting seat 7, and the bottom of the cylinder seat 6 has a tooth pattern corresponding to the rack 18. The cylinder seat 6 is clamped on the rack 18 and fixed to the rack 18 by bolts. On the one hand, the position of the cylinder seat 6 can be adjusted according to the length of the square tube 4, and on the other hand, the reliability of the fixation of the cylinder seat 6 is ensured.

Claims

1. A high-precision square tube straightening machine, characterized in that: It comprises a bed (1), a fixed clamping claw seat (2) and a movable clamping claw seat (3), and two ends of a square tube (4) to be straightened are clamped on the clamping claw mechanisms on the fixed clamping claw seat (2) and the movable clamping claw seat (3) respectively; The movable claw seat (3) is telescopically connected to the end of a piston rod of a cylinder (5); the cylinder (5) is fixed on a cylinder seat (6); the cylinder seat (6) is positioned on a bed (1); a hydraulic gauge is provided on the cylinder (5); and the fixed claw seat (2) is fixed on a mounting seat (7) at one end of the bed (1).

2. A high-precision square tube straightening machine as claimed in claim 1, characterized in that: It also comprises a controller, and the oil cylinder (5), the hydraulic gauge and the claw mechanism are all connected to the controller.

3. A high-precision square tube straightening machine as claimed in claim 2, characterized in that: The clamping claw mechanism comprises a hydraulic cylinder (9) fixed on a fixed clamping claw seat (2) or a movable clamping claw seat (3), a guide seat (10) and two clamping claw bodies (11); the piston rod of the hydraulic cylinder (9) is connected to the guide seat (10) via a connecting rod (12); the guide seat (10) has a V-shaped guide groove (13); the two clamping claw bodies (11) are respectively arranged on both sides of the guide groove (13) and are displaced along the side walls of the guide groove (13).

4. A high-precision square tube straightening machine as claimed in claim 3, characterized in that: The two claw bodies (11) also have anti-slip grooves (14) on the sides facing each other.

5. A high-precision square tube straightening machine as claimed in claim 4, characterized in that: There are two connecting rods (12), a connecting plate (15) is fixed to the end of the piston rod, and the two connecting rods (12) are respectively arranged between the connecting plate (15) and the two sides of the rear end of the fixed claw seat (2) or the movable claw seat (3).

6. A high-precision square tube straightening machine as claimed in claim 5, characterized in that: The two connecting rods (12) are respectively sleeved with springs (16).

7. A high-precision square tube straightening machine as claimed in claim 6, characterized in that: The fixed clamping claw seat (2) and the movable clamping claw seat (3) are also provided with a triangular limiting platform (17).

8. A high-precision square tube straightening machine as claimed in claim 7, characterized in that: A rack (18) is fixed to one end of the bed (1) away from the mounting seat (7), the bottom of the oil cylinder seat (6) has a tooth pattern corresponding to the rack (18), and the oil cylinder seat (6) is clamped on the rack (18) and fixed to the rack (18) by bolts.

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