Stretching end vertical jaw mechanism of aluminum profile straightening machine

Abstract

A stretching end vertical jaw mechanism of an aluminum profile straightening machine comprises a vehicle body frame, and the vehicle body frame is installed on a rail which is fixed to the ground and arranged in the X direction. A jaw material clamping C-shaped groove is formed in the X-direction front end of the vehicle body frame; by taking the center of the jaw clamping C-shaped groove as a symmetry plane, mounting holes are formed in the upper end and the lower end of the vehicle body frame, flange oil cylinder caps coaxial with the mounting holes are arranged at the upper end and the lower end of the vehicle body frame, the flange ends of the flange oil cylinder caps are combined on the vehicle body frame through bolts, and internal threads are machined in inner holes of the flange oil cylinder caps; guide copper sleeves are arranged in the upper mounting hole and the lower mounting hole, clamping oil cylinders are mounted in inner holes of the upper guide copper sleeve and the lower guide copper sleeve, piston rods of the clamping oil cylinders are matched with inner holes of the flange oil cylinder caps, outer circular surfaces of cylinder bodies of the clamping oil cylinders are in clearance fit with inner hole surfaces of the guide copper sleeves, and tail ends of cylinder barrels of the clamping oil cylinders are fixed with clamping toothed plates. The jaws at the two ends are in a vertical clamping mode, stress of a vehicle body supporting structure can be effectively optimized, materials are saved, and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary mechanisms of aluminum profile extrusion production lines, and in particular relates to a vertical jaw mechanism of a stretching end of an aluminum profile straightening machine. Background Art

[0002] In the aluminum profile extrusion rear handling production line, the online straightening machine is used to remove the internal stress and correct the shape of the aluminum profile that has been deformed due to internal stress after quenching. The principle is to clamp the two ends of the aluminum profile with two jaws, fix the jaws at the moving end, and stretch the profile through the cylinder output to remove most of the internal stress and correct the shape. Figure 1 The common jaw structures are usually the inclined wedge vise type and the cam press type.

[0003] The cam knife-pressing structure clamps the profile through the cam self-locking principle, that is, the stretching center will change with the profile section height. However, the cam self-locking clamping is limited by the self-locking stroke and equipment space (the greater the change in the profile section height, the greater the self-locking stroke required, and the larger the cam knife-pressing radius). Therefore, this type of jaws is only suitable for small-tonnage straightening machines with little change in the profile center height. The structure of the inclined wedge vise type is a symmetrical structure up and down. It clamps and stretches the profile through the inclined wedge self-locking principle. It is limited by the inclined wedge angle. The larger the cross-section of the profile blank to be stretched and the longer the inclined surface, the higher and longer the jaw body will be.

[0004] Whether it is a cam-type or a wedge-type jaw clamping structure, they are both a labor-saving and force-enhancing mechanism. While they have the advantage of reducing the size of the pre-clamping action cylinder before stretching, they also have the disadvantage of increasing the volume of the vehicle body space (wasting materials). Moreover, due to Newton's third law, as a force-enhancing mechanism, the greater reaction force also places high demands on the vehicle body steel structure that provides support. This is particularly serious in ultra-large tonnage straightening machines.

[0005] As the development technology advances, the aluminum extrusion rear handling production line is developing towards large-tonnage production and highly automated centralized control. In the ultra-large tonnage straightening machine, the larger the cross-section, the greater the required tensile straightening force. For the jaws with a force-enhancing mechanism, the reaction force on the body that provides the clamping support force is greater than the tensile straightening force. In the stress concentration area restricted by the structure, it is no longer a problem that can be solved by simply thickening the steel. Therefore, under the fundamental requirements of material stiffness and strength, abandoning the force-enhancing mechanism can reduce the length, width and height of the body steel plate and reduce costs. Utility Model Content

[0006] The utility model aims to provide a vertical jaw mechanism at the stretching end of an aluminum profile straightening machine, which at least solves the problem of reducing costs.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A vertical jaw mechanism at the stretching end of an aluminum profile straightening machine comprises a body frame, the body frame being a box-shaped welded structure, installed on a rail fixed to the ground and arranged along the X direction; a C-shaped groove for clamping materials is processed at the front end in the X direction of the body frame, so as to facilitate the entry of the incoming material end into the jaw and reduce the stretching action;

[0009] With the center of the C-shaped groove of the jaw clamping material as the symmetry plane, mounting holes are opened on the upper and lower parts of the vehicle body frame. Flange oil cylinder caps coaxial with the mounting holes are arranged at both ends of the vehicle body frame, and the flange ends of the flange oil cylinder caps are bolted to the vehicle body frame. The inner hole of the flange oil cylinder cap is processed with internal threads. Guide copper sleeves are arranged in the upper and lower mounting holes. The outer diameter surface of the guide copper sleeves is interference fit with the inner hole surface of the mounting hole. Clamping oil cylinders are installed in the inner holes of the upper and lower guide copper sleeves. The piston rods of the clamping oil cylinders The end is processed with an external thread, and the piston rod of the clamping cylinder cooperates with the internal thread on the flange cylinder cap through the external thread on it, and a locking screw is drilled and screwed between the internal thread and the external thread at the end face, which plays the role of loosening the thread and limiting the rotation, and the outer circular surface of the cylinder body of the clamping cylinder and the inner hole surface of the guide copper sleeve are clearance-matched, and a dovetail boss is processed at the tail end of the cylinder barrel of the clamping cylinder. The dovetail boss and the dovetail groove on the clamping tooth plate are connected by grinding a small gap, and the clamping tooth plate is fixedly installed on the clamping cylinder.

[0010] A tooth plate rotation limiting mechanism is installed between the support surface at the end of the C-shaped groove of the jaw material clamping and the material clamping tooth plate. The tooth plate rotation limiting mechanism consists of a bracket and a tooth plate anti-rotation support. One end of the bracket is bolted to the X-direction surface of the material clamping tooth plate, and the other end is installed with a friction copper plate. Two tooth plate anti-rotation supports are arranged symmetrically on the support surface according to the center. A protrusion is processed on the center end of the two tooth plate anti-rotation support surfaces, which cooperates with the friction copper plate on the bracket to provide Z-direction displacement constraint for the material clamping tooth plate.

[0011] A through hole is opened along the X direction at the center of the supporting surface at the end of the C-shaped groove of the jaw clamping material, and a stretching cylinder mounting position is arranged at the end of the through hole. Threaded holes are opened at equal intervals along the circumference of the stretching cylinder mounting position. The stretching cylinder is installed on the stretching cylinder mounting position by bolts, and at the same time passes through the X-direction through hole on the vehicle body frame.

[0012] A friction copper plate mounting frame is symmetrically installed at the bottom end of the vehicle body frame along the X direction, and a number of ribs are arranged at equal intervals between the upper surface of the friction copper plate mounting frame and the vehicle body frame, and two friction copper plates in contact with the upper surface of the rail are installed on the lower surface of each friction copper plate mounting frame, and a vehicle body anti-rotation limiter is symmetrically installed on the outer side of the friction copper plate mounting frame, and a side friction copper plate is installed at the contact position between the vehicle body anti-rotation limiter and the side wall of the rail.

[0013] The beneficial technical effects of the utility model are:

[0014] The utility model makes the jaws at both ends into a vertical clamping mode, which can effectively optimize the force of the car body support structure, save materials and reduce costs. Especially in super-large tonnage machines, it solves the problem of material yielding caused by stress concentration at the C-shaped groove of the jaws; and the mechanism adopts a cylinder rod fixed cylinder barrel telescopic action mode, which effectively reduces the geometric size of the required oil cylinder, and the action control is simple and reliable, reducing the force of the oil cylinder in the stretching and straightening process of large-section aluminum profiles. At the same time, the light weight of the body frame of the utility model saves a lot of equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the stretching principle diagram;

[0016] Figure 2 Schematic diagram of the vertical jaw mechanism at the stretching end of the aluminum profile straightening machine of the utility model;

[0017] Figure 3 A schematic diagram of the body frame of the vertical jaw mechanism at the stretching end of the aluminum profile straightening machine of the utility model;

[0018] Figure 4 A schematic diagram of the upper clamping cylinder portion of the vertical jaw mechanism at the stretching end of the aluminum profile straightening machine of the utility model;

[0019] 1-car body frame, 2-flange cylinder cap, 3-clamping cylinder, 4-clamping tooth plate, 5-guide copper sleeve, 6-tooth plate anti-rotation support, 7-bracket, 8-friction copper plate, 9-stretching cylinder mounting position, 10-dovetail boss, 11-friction copper plate mounting frame, 12-rib plate, 13-car body anti-rotation limiter. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 2 to 4 As shown, a vertical jaw mechanism of a stretching end of an aluminum profile straightening machine comprises a body frame 1, wherein the body frame 1 is a box-shaped welded structure, and is installed on a rail fixed to the ground and arranged along the X direction; a C-shaped groove for clamping materials is processed at the front end in the X direction of the body frame 1, so as to facilitate the end of the incoming material to enter the jaw and reduce the stretching action; a stress concentration fillet is processed at the corner of the C-shaped groove for clamping materials;

[0022] Taking the center of the C-shaped groove of the jaw clamping material as the symmetry plane, mounting holes are opened on the upper and lower parts of the vehicle body frame 1, and flange cylinder caps 2 coaxial with the mounting holes are arranged at the upper and lower ends of the vehicle body frame, and the flange ends of the flange cylinder caps 2 are bolted to the vehicle body frame 1, and the inner hole of the flange cylinder cap 2 is processed with internal threads, and guide copper sleeves 5 are arranged in the upper and lower mounting holes, and the outer diameter surface of the guide copper sleeve 5 is interference fit with the inner hole surface of the mounting hole, and clamping cylinders 3 are installed in the inner holes of the upper and lower guide copper sleeves 5, and the piston rod end of the clamping cylinder 3 is processed with external threads, and the piston rod of the clamping cylinder 3 is connected to the flange cylinder cap through the external threads thereon 2, and a set screw is drilled and screwed between the internal thread and the external thread at the end face, which plays the role of loosening and limiting the rotation of the thread, and the outer circumferential surface of the cylinder body of the clamping cylinder 3 and the inner hole surface of the guide copper sleeve 5 are matched with each other in clearance. A dovetail boss is processed at the tail end of the cylinder barrel of the clamping cylinder 3, and the dovetail boss 10 is connected with the dovetail groove on the clamping tooth plate 4 by grinding a small clearance, and the clamping tooth plate 4 is fixedly installed on the clamping cylinder 3. The advantage of this is that there are no fasteners between the clamping tooth plate 4 and the clamping cylinder 3, and there are no fastener holes on the tooth surface. In this way, there are fewer cracks during the quenching heat treatment of the tooth surface, which can effectively improve the life of the clamping tooth plate 4.

[0023] A tooth plate rotation limiting mechanism is installed between the end support surface of the C-shaped groove of the jaw clamping material and the clamping tooth plate 4, and the tooth plate rotation limiting mechanism includes a bracket 7 and a tooth plate anti-rotation support 6. One end of the bracket 7 is bolted to the X-axis surface of the clamping tooth plate 4, and the other end is installed with a friction copper plate 8. Two tooth plate anti-rotation supports 6 are arranged symmetrically at the center at the support surface, and a protrusion is processed on the surface of the two tooth plate anti-rotation supports 6 at one end close to the center. The protrusion cooperates with the friction copper plate 8 on the bracket 7 to provide Z-direction displacement constraint for the clamping tooth plate 4 to prevent the clamping tooth plate 4 from rotating along the axis of the clamping cylinder 3 due to eccentricity of the aluminum profile during the stretching process; when the stretching action is performed, the tooth plate rotation limiting mechanism is equivalent to a pressure rod, and the symmetrical arrangement can withstand bidirectional eccentric torque; when the clamping cylinder 3 is actuated, the friction copper plate 8 on the bracket 7 can reduce the friction on the end support surface of the C-shaped groove of the jaw clamping material.

[0024] In the present embodiment, the oil inlet and return holes of the clamping cylinder 3 are both located on the end face of the piston rod, which is convenient for hydraulic pipe connection; when the clamping cylinder 3 is in motion, since the piston rod is fixedly mounted on the vehicle frame 1 through the flange cylinder cap 2, the cylinder barrel moves in a telescopic motion, at which time the cylinder barrel and the guide copper sleeve 5 slide and rub; during stretching, the cylinder barrel with a larger bending section coefficient bears the tensile bending moment.

[0025] A through hole is opened along the X direction at the center of the supporting surface at the end of the C-shaped groove of the jaw clamping material, and a stretching cylinder mounting position 9 is set at the end of the through hole, and threaded holes are opened at equal intervals along the circumference of the stretching cylinder mounting position 9. The stretching cylinder is installed on the stretching cylinder mounting position 9 by bolts, and at the same time passes through the X-direction through hole on the vehicle body frame 1. The stretching cylinder moves along the X direction toward the side away from the clamping tooth plate 4 to complete the stretching action.

[0026] A friction copper plate mounting frame 11 is symmetrically installed at the bottom end of the vehicle body frame 1 along the X direction, and a plurality of ribs 12 are arranged at equal intervals between the upper surface of the friction copper plate mounting frame 11 and the vehicle body frame 1. In this embodiment, the number of ribs 12 is 5, and two friction copper plates 8 in contact with the upper surface of the rail are installed on the lower surface of each friction copper plate mounting frame 11. A vehicle body anti-rotation limit 13 is symmetrically installed on the outer side of the friction copper plate mounting frame 11, and a side friction copper plate 8 is installed at the contact position between the vehicle body anti-rotation limit 13 and the side wall of the rail.

[0027] like Figure 2 As shown in the figure, the use process of the vertical jaw mechanism of the stretching end of an aluminum profile straightening machine:

[0028] According to the length of the aluminum profile blank, the jaws at the moving end of the straightening machine move along the rail to a position suitable for the length and are fixed, and the vertical jaw mechanism at the stretching end is in the initial zero position without stretching;

[0029] Place one end of the aluminum profile blank with the fixed position of the jaws at the moving end of the straightening machine as the reference, and slightly adjust the initial position of the jaws at the stretching end of the straightening machine according to the length error of the aluminum profile blank to adapt to the other end of the aluminum profile blank;

[0030] The material picking device drives the aluminum profile blank to move along the Z direction and is fed into the vertical jaws at the moving end of the straightening machine. According to the cross-sectional height of the aluminum profile blank, the aluminum profile blank is lifted by the feeding device so that the clamping center of the vertical jaws at the stretching end coincides with the center of the aluminum profile cross-sectional height. Then, the aluminum profile is clamped by the clamping tooth plates 4 at the C-shaped grooves of the jaws at the upper and lower ends, and the stretching end stretches the profile by the action of the stretching cylinder.

[0031] The clamping oil cylinder 3 extends to clamp the material. The structural features of this are:

[0032] The profile is clamped by using the cylinder force of the hydraulic system of the clamping cylinder 3 when the overflow pressure is less than the tensile force of the profile as the clamping force, which can solve the problem of material yielding caused by stress concentration at the C-shaped groove of the vertical jaw clamping;

[0033] The hydraulic balance valve installed at the oil inlet and outlet of the clamping oil cylinder 3 is used to add load to solve the problem of asynchronous extension and contraction of the cylinders caused by different loads of the upper and lower clamping oil cylinders 3 due to gravity;

[0034] The cylinder rod is used to fix the cylinder barrel to expand and contract. The bending section coefficient is increased to solve the problem of large bending moment caused by the long force arm of the clamping mechanism when stretching thin profiles.

[0035] The tooth plate rotation limiting mechanism is used to prevent the problem that the clamping tooth plate 4 rotates along the axis of the clamping oil cylinder 3 with the cylinder rod during stretching caused by eccentricity of the profile.

Claims

1. A vertical jaw mechanism at the stretching end of an aluminum profile straightening machine, characterized in that: It includes a vehicle frame, which is a box-shaped welded structure and is installed on a rail fixed on the ground and arranged along the X direction; the front end of the vehicle frame in the X direction is processed with a C-shaped groove for clamping the material, so as to facilitate the end of the incoming material to enter the jaw and reduce the stretching action; With the center of the C-shaped groove of the jaw clamping material as the symmetry plane, mounting holes are opened above and below the body frame, and flange cylinder caps coaxial with the mounting holes are arranged at the upper and lower ends of the body frame, and the flange ends of the flange cylinder cap are fastened to the body frame by bolts, and the inner hole of the flange cylinder cap is processed with an internal thread, and guide copper sleeves are arranged in the upper and lower mounting holes, and the inner holes of the upper and lower guide copper sleeves are installed with clamping cylinders, and the piston rod end of the clamping cylinder is processed with an external thread, and the piston rod of the clamping cylinder is matched with the internal thread on the flange cylinder cap through the external thread thereon, and a set screw is drilled and screwed between the internal thread and the external thread at the end face to play the role of thread loosening and limiting rotation, and the outer circumferential surface of the cylinder body of the clamping cylinder is matched with the inner hole surface of the guide copper sleeve, and a dovetail boss is processed at the tail end of the cylinder barrel of the clamping cylinder, and the dovetail boss is connected with the dovetail groove on the clamping tooth plate by grinding a small gap, and the clamping tooth plate is fixedly installed on the clamping cylinder.

2. The vertical jaw mechanism at the stretching end of an aluminum profile straightening machine according to claim 1, characterized in that: A tooth plate rotation limiting mechanism is installed between the support surface at the end of the C-shaped groove of the jaw material clamping and the material clamping tooth plate. The tooth plate rotation limiting mechanism consists of a bracket and a tooth plate anti-rotation support. One end of the bracket is bolted to the X-direction surface of the material clamping tooth plate, and the other end is installed with a friction copper plate. Two tooth plate anti-rotation supports are arranged symmetrically on the support surface according to the center. A protrusion is processed on the center end of the two tooth plate anti-rotation support surfaces, which cooperates with the friction copper plate on the bracket to provide Z-direction displacement constraint for the material clamping tooth plate.

3. The vertical jaw mechanism at the stretching end of the aluminum profile straightening machine according to claim 1 is characterized in that: A through hole is opened along the X direction at the center of the supporting surface at the end of the C-shaped groove of the jaw clamping material, and a stretching cylinder mounting position is arranged at the end of the through hole. Threaded holes are opened at equal intervals along the circumference of the stretching cylinder mounting position. The stretching cylinder is installed on the stretching cylinder mounting position by bolts, and at the same time passes through the X-direction through hole on the vehicle body frame.

4. The vertical jaw mechanism at the stretching end of the aluminum profile straightening machine according to claim 1 is characterized in that: A friction copper plate mounting frame is symmetrically installed at the bottom end of the vehicle body frame along the X direction, and a number of ribs are arranged at equal intervals between the upper surface of the friction copper plate mounting frame and the vehicle body frame, and two friction copper plates in contact with the upper surface of the rail are installed on the lower surface of each friction copper plate mounting frame, and a vehicle body anti-rotation limiter is symmetrically installed on the outer side of the friction copper plate mounting frame, and a side friction copper plate is installed at the contact position between the vehicle body anti-rotation limiter and the side wall of the rail.

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