A constant tension tension machine and special-shaped metal wire production line

Abstract

The present invention relates to the technical field of metal wire rolling equipment, and in particular to a constant tension machine and a special-shaped metal wire production line. Compared with the prior art, the present invention sets a first roller and a second roller of the same diameter, and sets a linear guide pair so that the moving direction of the second roller relative to the first roller is parallel to the line connecting the center points of the two rollers, and applies a constant force to the second roller along the moving direction of the slider away from the first roller through a pressure device. When the special-shaped metal wire goes around the first roller and the second roller for one circle, the force on the wire is parallel to the force direction, so even when the second roller is displaced, the wire tension is constant at half of the constant force applied by the pressure device, thereby stabilizing the rolling process to improve product accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of metal wire rolling equipment, in particular to a constant tension tension machine and a special-shaped metal wire production line. Background Art

[0002] In continuous rolling equipment, a tension machine must be used between two rolling mills. In an active flat rolling mill, the role of the tension machine is to coordinate the speeds of the two adjacent rolling mills through the displacement sensor of the dancing wheel; the tension generated by the tension machine is the traction force of the front mill, which affects the rolling, and it is also the reverse pulling force of the back mill, which affects the rolling width. Stable tension is very important for the rolling process; it acts as a buffer to prevent the metal wire from being broken. In a passive special-shaped continuous rolling mill, the role of the tension machine is to coordinate the speeds of the two adjacent rolling mills through the displacement sensor of the dancing wheel; the tension generated by the tension machine presses on the traction machine to form a static friction force to provide traction for the front mill, and it is also the reverse pulling force of the back mill, which affects the rolling width. Stable tension is very important for the rolling process; it acts as a buffer to prevent the metal wire from being broken. Therefore, how to stabilize the tension provided by the tension machine is an important technical issue in this field.

[0003] In the prior art, for example, a Chinese patent with publication number CN210358549U (publication date April 21, 2020) discloses a wire buffer device, a box body, a wire inlet and a wire outlet are arranged on the box body, a fixed wheel and a moving wheel are arranged in the box body, the fixed wheel is connected to the box body through an axis rotation connection, the moving wheel is connected to a slider, the moving wheel and the slider are connected through an axis rotation connection, a linear guide rail matching the slider is arranged on the box body, and a tensioner is arranged between the slider and the box body. This patent can control the tension of the wire, so that the wire entering the rolling mill is straight, and the rolling accuracy of the wire is ensured. In a type of tension machine represented by the above patent, a method such as Figure 1 The triangular structure shown in the figure has two fixed guide wheels on the left and right, and a dancing wheel in the middle. The pressure F is applied to the dancing wheel to generate tension f. The displacement sensor is installed on the dancing wheel to coordinate the speed of the front and rear rolling mills. Figure 2 It can be seen from the force analysis shown that when the pressure F remains unchanged, the position of the dancing wheel directly affects the tension f. Therefore, the tension in the prior art is unstable and difficult to control, which affects the product accuracy. The dancing wheel is extremely sensitive to response, and the displacement sensor needs to constantly adjust the rolling speed, affecting the product accuracy.

[0004] In summary, the problem of unstable tension in the tension machine in the prior art resulting in poor product precision needs to be solved. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a constant tension tension machine and a special-shaped metal wire production line, wherein the constant tension tension machine comprises a first roller, a second roller and a frame;

[0006] The first roller is rotatably disposed on the frame, and the first roller has the same diameter as the second roller;

[0007] The frame is provided with a linear guide pair, the linear guide pair comprises a linear slideway and a slider, and the slider is slidably connected with the linear slideway;

[0008] The second roller is rotatably disposed on the slider, and the sliding direction of the slider is parallel to a line connecting the center points of the first roller and the second roller;

[0009] A pressure applying device is also included, and the pressure applying device is used to apply a constant force along the moving direction of the slider to the second roller.

[0010] In one embodiment, the pressure-applying device comprises an adjustable pressure cylinder, one end of the adjustable pressure cylinder is connected to the frame, and the other end of the adjustable pressure cylinder is connected to the second roller.

[0011] In one embodiment, it also includes a bearing seat arranged on the slider, the second roller is rotatably connected to the slider through the bearing seat, and the rotating shaft of the second roller passes through the bearing seat and is connected to the adjustable pressure cylinder.

[0012] In one embodiment, the bearing seat is hinged to the slider, and a hinge axis between the bearing seat and the slider is parallel to a line connecting the center points of the first roller and the second roller.

[0013] In one embodiment, the tension machine also includes an angle adjuster, and the bearing seat is connected to the frame through the angle adjuster, and the angle adjuster is used to adjust the second roller to rotate around the hinge axis of the bearing seat and the slider so that a certain angle is formed between the respective central axes of the first roller and the second roller.

[0014] In one embodiment, the angle adjuster includes a screw rod and a nut block, one end of the screw rod has a hexagonal end, and the other end of the screw rod passes through the nut block hinged to the frame and is hinged to the bearing seat.

[0015] In one embodiment, a displacement sensor is further included. The displacement sensor is fixed on the frame and is used to detect the displacement of the second roller.

[0016] In one embodiment, a wire stopper is further included, including a wire stop roller and a connecting rod, wherein the wire stop roller is rotatably connected to the frame through the connecting rod.

[0017] In one embodiment, the diameter of the first roller is greater than 5 cm.

[0018] The present invention also provides a special-shaped metal wire production line, which adopts the constant tension machine as described in any one of the above items.

[0019] Based on the above, compared with the prior art, the constant tension tension machine provided by the present invention, by setting a first roller and a second roller of the same diameter, and the setting of the linear guide pair makes the moving direction of the second roller relative to the first roller parallel to the line connecting the center points of the two rollers, and applies a constant force to the second roller along the moving direction of the slider away from the first roller through a pressure device. When the special-shaped metal wire goes around the first roller and the second roller for one circle, the force on the wire is parallel to the force direction. Therefore, even when the second roller is displaced, the wire tension is constant at half of the constant force applied by the pressure device, thereby stabilizing the rolling process to improve product precision.

[0020] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions in which the components are drawn in the diagrams, unless otherwise specified.

[0022] Figure 1 It is a schematic diagram of the triangular structure of the tension machine in the prior art;

[0023] Figure 2 for Figure 1 Schematic diagram of force analysis of the structure shown;

[0024] Figure 3 A schematic diagram of the main structure of an embodiment of a tension machine with constant tension provided by the present invention;

[0025] Figure 4 A schematic top view of the structure of an embodiment of a tension machine with constant tension provided by the present invention.

[0026] Reference numerals:

[0027] 110 first roller 120 second roller 200 frame

[0028] 210 linear guide pair 211 linear slide 212 slider

[0029] 300 Pressure device 400 Displacement sensor 500 Wire stopper

[0030] 510 wire blocking roller 520 connecting rod 213 bearing seat DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in the present invention.

[0033] The following is described by means of specific examples.

[0034] The present invention provides a constant tension tension machine, comprising a first roller 110, a second roller 120 and a frame 200; the first roller 110 is rotatably arranged on the frame 200, and the first roller 110 has the same diameter as the second roller 120; a linear guide pair 210 is provided on the frame 200, and the linear guide pair 210 comprises a linear slideway 211 and a slider 212, and the slider 212 is slidably connected to the linear slideway 211; the second roller 120 is rotatably arranged on the slider 212, and the sliding direction of the slider 212 is parallel to the line connecting the center points of the first roller 110 and the second roller 120 respectively; and the machine also comprises a pressure device 300, and the pressure device 300 is used to apply a constant force to the second roller 120 along the moving direction of the slider 212 away from the first roller 110.

[0035] In the specific implementation, the present embodiment is described by taking the horizontally arranged first roller 110 and the second roller 120 as an example, but the relative positions of the first roller 110 and the second roller 120 are not limited thereto. Figure 3 As shown, from left to right are the first roller 110 and the second roller 120 of the same diameter, the central axes of the two are horizontally arranged and parallel, the first roller 110 is rotatably mounted on the frame 200 through a bearing, the frame 200 is provided with a linear guide pair 210, specifically, a linear slide 211 is opened, and a slider 212 is provided in the linear slide 211, the second roller 120 is rotatably set on the slider 212, and the sliding direction of the slider 212 in the linear slide 211 is parallel to the line connecting the center points of the first roller 110 and the second roller 120 respectively, and the second roller 120 also bears a constant force applied by the pressure device 300 away from the first roller 110.

[0036] When in use, when the special-shaped metal wire is wound around the first roller and the second roller once, the force on the wire is parallel to the direction of force application. Therefore, even when the second roller is displaced, the wire tension remains constant at half of the constant force applied by the pressure device. The stable tension provides a stable buffer between the active pay-off machine and the take-up machine located before and after the tension machine, so that the metal wire is in a flexible transition, thereby stabilizing the rolling process and improving product precision.

[0037] Preferably, if Figure 4 As shown, in some embodiments, the pressure-applying device 300 includes an adjustable pressure cylinder, one end of which is connected to the frame 200 , and the other end of which is connected to the second roller 120 .

[0038] Specifically, Figure 3 As shown, the tension machine further includes a bearing seat 213 disposed on the slider 212, the second roller 120 is rotatably connected to the slider 212 via the bearing seat 213, and the rotation axis of the second roller 120 passes through the bearing seat 213 and is connected to the adjustable pressure cylinder. The bearing seat 213 is hinged to the slider 212, and the hinge axis of the bearing seat 213 and the slider 212 is parallel to the line connecting the center points of the first roller 110 and the second roller 120.

[0039] Preferably, in some embodiments, the tension machine further comprises an angle adjuster, the bearing seat 213 is connected to the frame 200 through the angle adjuster, and the angle adjuster is used to adjust the second roller to rotate around the hinge axis of the bearing seat 213 and the slider 212 so that a certain angle is formed between the respective central axes of the first roller 110 and the second roller 120. The angle adjuster comprises, for example, a screw and a nut block, one end of the screw has a hexagonal end, and the other end of the screw passes through the nut block hinged to the frame 200 and is hinged to the bearing seat 213.

[0040] The angle adjuster can be used to adjust the angle of the second roller 120 of the tension machine relative to the first roller 110 during the winding process to avoid wire clamping, wire derailment, etc. during the winding process.

[0041] Preferably, if Figure 4 As shown, in some embodiments, a displacement sensor 400 is further included. The displacement sensor 400 is fixed on the frame 200 , and the displacement sensor 400 is used to detect the displacement of the second roller 120 .

[0042] The displacement sensor 400 is used to detect whether the second roller 120 moves to the left or to the right. For example, when the second roller 120 is detected to move to the left, it means that the wire is in a tensioned state. The displacement sensor 400 sends a signal to the controller, and then the controller can be used to adjust the motor speeds of the front and rear pay-off machines or take-up machines to coordinate the front and rear rolling speeds and buffers, and vice versa. Moreover, the parallel structure design in the present invention enables the tension machine to have double the buffer distance and stronger buffering capacity. At the same time, for the displacement sensor 400, the displacement of the second roller 120 that is detected and responded to is half of the buffer distance. Therefore, the displacement sensor 400 is relatively not particularly sensitive to frequently adjust the rolling speed, thereby improving the stability of the rolling speed to improve product accuracy.

[0043] Preferably, if Figure 3 As shown, in some embodiments, a wire stopper 500 is further included, including a wire stopper roller 510 and a connecting rod 520, wherein the wire stopper roller 510 is rotatably connected to the frame 200 via the connecting rod 520. The wire stopper 500 can be used to press the wire stopper roller 510 against the metal wire to prevent it from slipping off the winding drum.

[0044] Preferably, in some embodiments, the diameters of the first roller 110 and the second roller 120 can be rollers with larger diameters. Preferably, for example, the diameters of the first roller 110 and the second roller 120 are greater than 50 cm. Figure 1The guide wheel with a very small curvature radius in the prior art causes the metal wire to deform repeatedly when passing through the guide wheel, which affects the product quality. In this embodiment, a roller with a larger curvature radius is used to avoid large deformation of the metal wire to improve the product quality.

[0045] The present invention also provides a special-shaped metal wire production line, which adopts the constant tension machine as described in any one of the above items.

[0046] In summary, compared with the prior art, the constant tension tension machine provided by the present invention, by setting a first roller and a second roller of the same diameter, and the setting of the linear guide pair makes the moving direction of the second roller relative to the first roller parallel to the line connecting the center points of the two rollers, and applies a constant force to the second roller along the moving direction of the slider away from the first roller through a pressure device. When the special-shaped metal wire goes around the first roller and the second roller for one circle, the force on the wire is parallel to the force direction. Therefore, even when the second roller is displaced, the wire tension is constant at half of the constant force applied by the pressure device, thereby stabilizing the rolling process to improve product precision.

[0047] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0048] Although the terms such as first roller, second roller, frame, linear guide pair, linear slide, slider, pressure device, displacement sensor, wire stopper, wire stop roller and connecting rod are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A constant tension tension machine, characterized in that: The invention comprises a first roller (110), a second roller (120) and a frame (200); the first roller (110) is rotatably arranged on the frame (200), and the first roller (110) has the same diameter as the second roller (120); a linear guide pair (210) is arranged on the frame (200), and the linear guide pair (210) comprises a linear slideway (211) and a slider (212), and the slider (212) is slidably connected to the linear slideway (211); the second roller (120) is rotatably arranged on the slider (212), and the sliding direction of the slider (212) is parallel to the line connecting the center points of the first roller (110) and the second roller (120); the invention also comprises a pressure device (300), and the pressure device (300) is used to apply a constant force to the second roller (120) along the moving direction of the slider (212) away from the first roller (110); The pressure-applying device (300) comprises an adjustable pressure cylinder, one end of which is connected to the frame (200) and the other end of which is connected to the second roller (120); It also includes a bearing seat (213) disposed on the slider (212), the second roller (120) is rotatably connected to the slider (212) via the bearing seat (213), and the rotating shaft of the second roller (120) passes through the bearing seat (213) and is connected to the adjustable pressure cylinder; The bearing seat (213) is hinged to the slider (212), and the hinge axis of the bearing seat (213) and the slider (212) is parallel to a line connecting the center points of the first roller (110) and the second roller (120); The tension machine further comprises an angle adjuster, the bearing seat (213) is connected to the frame (200) via the angle adjuster, and the angle adjuster is used to adjust the second roller (120) to rotate around the hinge axis of the bearing seat (213) and the slider (212) so that a certain angle is formed between the respective central axes of the first roller (110) and the second roller (120); The angle adjuster comprises a screw rod and a nut block, one end of the screw rod has a hexagonal end, and the other end of the screw rod passes through the nut block hinged to the frame (200) and is hinged to the bearing seat (213); It also includes a wire stopper (500), which includes a wire stop roller (510) and a connecting rod (520), wherein the wire stop roller (510) is rotatably connected to the frame (200) via the connecting rod (520).

2. The constant tension tension machine according to claim 1, characterized in that: It also includes a displacement sensor (400), which is fixed on the frame (200) and is used to detect the displacement of the second roller (120).

3. The constant tension tension machine according to claim 1, characterized in that: The diameter of the first roller (110) is greater than 5 centimeters.

4. A special-shaped metal wire production line, characterized in that: A constant tension tension machine as described in any one of claims 1 to 3 is used.

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