A straightening machine with a bar protection device

Abstract

The present invention provides a straightening machine with a rod protection device, comprising: a pinch roller device and a rod protection device; the rod protection device is connected to the feeding side of the pinch roller device through a fixed steel plate; the rod protection device comprises a square frame and a rod protection module movably connected to the square frame, the middle of the rod protection module has a shaft sleeve for the rod to pass through, and the position of the shaft sleeve corresponds to the feeding position of the pinch roller device. The present invention sets a rod protection device on the feeding side of the pinch roller device, the rod protection device comprises a square frame and a rod protection module movably connected to the square frame, during actual operation, the rod passes through the shaft sleeve in the middle of the rod protection module, and the movement of the tail of the rod under the action of the inertial circumferential force can be limited by the shaft sleeve to prevent it from causing damage to adjacent supporting equipment.

Description

Technical Field

[0001] The invention relates to the technical field of bar straightening, in particular to a straightening machine with a bar protection device. Background Art

[0002] In the current steel finishing processing, the two-roller straightening machine has a simple structure and a wide range of uses. Its working part consists of two concave and convex straightening rollers, which are arranged at an angle. When working, the straightened steel passes through the curved roller gap between the two concave and convex rollers, rotating and moving forward, thereby realizing continuous, full-circumferential straightening function, and the angle between the straightening roller and the axis of the bar is very small, so that the pitch of the envelope line is shorter and the straightness of the straightening is better; but it also has many disadvantages, one of which is that when the head of the steel enters the straightening machine and is gradually straightened, the tail of the steel will have a tail swinging phenomenon. Since the steel is long enough, this phenomenon is most serious when the head of the steel is just straightened, and gradually decreases during the gradual straightening process of the entire steel. This phenomenon will cause damage to adjacent supporting equipment, for example, damage to the roller, bearing seat or roller base, thus affecting production efficiency. Summary of the invention

[0003] To this end, the present invention provides a straightening machine with a bar protection device which can prevent the damage of supporting equipment during the bar straightening process.

[0004] The present invention provides a straightening machine with a rod protection device, comprising: a pinch roller device and a rod protection device; the rod protection device is connected to the feeding side of the pinch roller device through a fixed steel plate; the rod protection device comprises a square frame and a rod protection module movably connected to the square frame, the middle of the rod protection module has a shaft sleeve for the rod to pass through, and the position of the shaft sleeve corresponds to the feeding position of the pinch roller device. The present invention sets a rod protection device on the feeding side of the pinch roller device, the rod protection device comprises a square frame and a rod protection module movably connected to the square frame, during actual operation, the rod passes through the shaft sleeve in the middle of the rod protection module, and the movement of the tail of the rod under the action of the inertial circumferential force can be limited by the shaft sleeve to prevent it from causing damage to adjacent supporting equipment.

[0005] Furthermore, the square frame is formed by docking a first end cover and a second end cover, both of which are square, and a square slide groove is formed between the docking positions of the first end cover and the second end cover, and the rod protection module is movably connected in the square slide groove.

[0006] Furthermore, the rod protection module includes an outer convex rib, a limiting groove connected to the inner side of the convex rib, and a buffer sleeve and a wear-resistant sleeve arranged in the limiting groove, and the limiting groove, buffer sleeve and wear-resistant sleeve form the shaft sleeve; wherein the convex rib is movably connected in the square slide groove, and the wear-resistant sleeve is located on the inner side of the buffer sleeve.

[0007] Furthermore, the wear-resistant sleeve protrudes from the edge of the limiting groove.

[0008] Furthermore, the buffer sleeve is made of rubber.

[0009] Furthermore, the wear-resistant sleeve is made of ductile iron.

[0010] Furthermore, lithium-based grease is filled between the convex rib and the square slide groove.

[0011] Furthermore, the outer contour of the rod protection module is a Lello triangle.

[0012] Furthermore, the outer contour of the bar protection module is an inscribed triangle.

[0013] Furthermore, the outer contour of the bar protection module is an eccentric circle.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A three-dimensional structural diagram of a straightening machine with a bar protection device is depicted;

[0017] Figure 2 The internal structure diagram of a straightening machine with a bar protection device is depicted;

[0018] Figure 3 A side view of a straightening machine with a bar protection device is depicted;

[0019] Figure 4 A cross-sectional view of a bar protection module is depicted;

[0020] Figure 5 A three-dimensional diagram of a bar protection module is depicted;

[0021] Figure 6 A motion trajectory diagram of the center point of a Lello triangle bar protection module is drawn;

[0022] Figure 7 A motion trajectory diagram of the sleeve of a Lello triangle bar protection module is drawn;

[0023] Figure 8 A structural diagram of another bar protection module is depicted;

[0024] Fig. 9 A structural diagram of yet another bar protection module is shown.

[0025] The accompanying drawings are marked as:

[0026] 1 Pinch roller device

[0027] 2 Rod protection device

[0028] 3 Fixing steel plate

[0029] 4 square frames

[0030] 41 First end cap

[0031] 42 Second end cap

[0032] 5 Bar protection module

[0033] 51 ribs

[0034] 52 Limiting slot

[0035] 53 Buffer sleeve

[0036] 54 wear-resistant sleeve

[0037] 55 Bushing DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The embodiment of the present invention provides a straightening machine with a bar protection device, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: a pinch roller device 1 and a rod protection device 2; the rod protection device 2 is connected to the feeding side of the pinch roller device 1 through a fixed steel plate 3; the rod protection device 2 includes a square frame 4 and a rod protection module 5 movably connected to the square frame 4, and the middle of the rod protection module 5 has a sleeve 55 for the rod to pass through, and the position of the sleeve 55 corresponds to the feeding position of the pinch roller device 1. The present invention sets a rod protection device 2 on the feeding side of the pinch roller device 1, and the rod protection device 2 includes a square frame 4 and a rod protection module 5 movably connected to the square frame 4. During actual operation, the rod passes through the sleeve 55 in the middle of the rod protection module 5, and the movement of the tail of the rod under the action of the inertial circumferential force can be limited by the sleeve 55.

[0042] The present invention is achieved by adding a rod protection device 2 to the pinch roller device 1. Since the equipment has been used online and the space is limited, the rod protection device cannot be set separately. Therefore, the rod protection device 2 is added to the pinch roller device 1. This can increase the overall rigidity and enable the rod protection device and the pinch roller device to work better together to achieve a better use effect. By adding the rod protection device 2, the excessive inertial circular motion generated by the tail can be limited, thereby reducing damage to the rod surface and damage to adjacent equipment.

[0043] In one aspect of the embodiment of the present invention, the square frame 4 is formed by docking a first end cover 41 and a second end cover 42, both of which are square, and a square slot 43 is formed between the docking positions of the first end cover 41 and the second end cover 42, and the bar protection module 5 is movably connected in the square slot 43. This arrangement allows the bar protection module 5 to be more stably installed in the square frame 4. Preferably, as Figure 4 As shown, the bar protection module 5 includes a peripheral convex rib 51, a limiting groove 52 connected to the inner side of the convex rib 51, and a buffer sleeve 53 and a wear-resistant sleeve 54 arranged in the limiting groove 52. The limiting groove 52, the buffer sleeve 53 and the wear-resistant sleeve 54 surround the shaft sleeve 55; wherein the convex rib 51 is movably connected to the square slide groove 43, and the wear-resistant sleeve 54 is located on the inner side of the buffer sleeve 53. During operation, the bar contacts the wear-resistant sleeve 54 under the action of the inertial circumferential force, so the wear-resistant sleeve 54 is a vulnerable part, and the material should be ductile iron or other wear-resistant materials, and the diameter of the wear-resistant sleeve 54 protrudes from the edge of the limiting groove 52, and its inner diameter is 3-5mm smaller than the inner diameter of the limiting groove. When the part of the wear-resistant sleeve 54 protruding from the limiting groove 52 is worn away, the wear-resistant sleeve 54 should be replaced, otherwise it is easy to cause the bar protection module 5 to be damaged by the bar to be straightened.

[0044] Further preferably, the material of the buffer sleeve 53 is rubber material. Its function is to reduce and buffer the impact of the bar on the bar protection module 5 under the action of the inertial circumferential force, which can reduce the noise during the straightening process, and further reduce the force of the inertial circumferential force on the pinch roller device 1, thereby reducing the damage to the pinch roller device 1.

[0045] In one aspect of the embodiment of the present invention, lithium-based grease is filled between the rib 51 and the square slide groove 43 to provide lubrication.

[0046] In one aspect of an embodiment of the present invention, Figure 5As shown, the outer contour of the bar protection module 5 is a Lello triangle. The bar protection device 2 is welded to the pinch roller device 1 through a fixed steel plate 3; if the bar quality is uneven or defective, when the head of the bar enters the straightening roller and starts straightening, the running track of the tail may not be a standard circular track. In order to adapt to the irregular movement track of the tail, the maximum contour of the bar protection module 5 can apply a Lello triangle. This triangle is approximately circular, and its characteristic is that it has the same width in any direction, that is, it can rotate freely between two parallel lines with a distance equal to the radius of its arc, and always keep in contact with both straight lines. Therefore, the Lello triangle is placed in a square frame 4 with a side length equal to the width of the Lello triangle. The outer contour line of the Lello triangle can always be in contact with the side line of the square, which can reduce the noise generated during work and transmit the inertial circumferential force generated during the straightening process to the pinch roller device, thereby making the working effect of the bar protection device more stable and reliable.

[0047] If the trajectory of the center point of the Lélau triangle is a circle (approximately a circle) Figure 6 As shown, according to the motion principle of the Léleau triangle and the running track of the tail of the straightened bar, we imagine the center point of the Léleau triangle as a sleeve 55 with a certain diameter. The sleeve 55 is installed together with the Léleau triangle parts, and the running track of the sleeve 55 is Figure 6 As shown; if the bar is placed at the center point, when the diameter of the inertial circular motion generated by the tail of the bar to be straightened is greater than the diameter of the sleeve 55, the movement will not be triggered, and the quality damage to the steel surface and the damage to the adjacent equipment will not be caused. However, if the diameter of the inertial circular motion generated by the tail of the bar to be straightened after entering the straightening machine is greater than the diameter of the sleeve 55, since the sleeve 55 limits the movement of the tail of the bar, the sleeve 55 can be triggered to press Figure 7 The running track movement, that is, the tail section bar can drive the sleeve 55 to make Figure 7 The motion trajectory shown, due to the limitation of the shaft sleeve 55, limits the inertial circular motion generated by the tail, thereby protecting the surface quality of the steel and the adjacent equipment from being damaged.

[0048] The maximum profile of the bar protection module 5 of the present invention adopts a combination of a Lello triangle and a square slide. The inertial circular motion of the bar drives the bar protection module 5 to perform approximate circular motion, and the center point of the Lello triangle presents a circular motion trajectory. This trajectory can adapt to the balanced and unbalanced quality of the bar. Its function is to protect the steel from colliding with other equipment due to the large inertial force generated at the tail when it is just straightened, resulting in reduced surface quality of the steel or damage to other equipment. In addition, the present application also proposes two different maximum profiles of the bar protection module 5, which can achieve similar solutions with similar protection effects: first, such as Figure 8As shown, a rod protection module 5 whose maximum profile is an external triangle is provided, which is characterized in that it is more adaptable to rods with balanced quality and no internal defects; secondly, as Fig. 9 As shown, a rod protection module 5 is provided whose maximum contour is an eccentric circle. It can adapt to more situations, but it also produces the most noise during the production process.

[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 straightening machine with a bar protection device, characterized in that: include: Pinch roller device and bar protection device; The bar protection device is connected to the feeding side of the pinch roller device through a fixed steel plate; The bar protection device comprises a square frame and a bar protection module movably connected to the square frame, wherein a shaft sleeve is provided in the middle of the bar protection module for the bar to pass through, and the position of the shaft sleeve corresponds to the feeding position of the pinch roller device; The square frame is formed by butting a first end cover and a second end cover, both of which are square, and a square slide groove is formed between the butting positions of the first end cover and the second end cover, and the bar protection module is movably connected in the square slide groove; The bar protection module comprises a peripheral convex rib, a limiting groove connected to the inner side of the convex rib, and a buffer sleeve and a wear-resistant sleeve arranged in the limiting groove, wherein the limiting groove, the buffer sleeve and the wear-resistant sleeve surround the shaft sleeve; wherein the convex rib is movably connected to the square slide groove, and the wear-resistant sleeve is located on the inner side of the buffer sleeve; The wear-resistant sleeve protrudes from the edge of the limiting groove; The material of the buffer sleeve is rubber; The outer contour of the rod protection module is a Lello triangle, an inscribed triangle or an eccentric circle.

2. A straightening machine with a bar protection device as claimed in claim 1, characterized in that: The wear-resistant sleeve is made of ductile iron.

3. A straightening machine with a bar protection device as claimed in claim 1, characterized in that: Lithium-based grease is filled between the convex rib and the square slide groove.

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