A cutting mechanism

Abstract

In the field of modern fully automatic steel pipe production lines, most of the cutting machines in the prior art are saw blade type cutting machines, but the high-speed rotation of the saw blade is dangerous, and a section of material will be lost after the pipe is milled and cut, resulting in waste. In order to solve this problem, it is necessary to adopt a non-material removal method, that is, a blade cutting method to complete such work. Therefore, in order to improve the quality of the blade cutting incision, the technical solution provides a cutting mechanism, which uses a breaking knife to first break the surface of the continuous hollow material so that the punching knife is inserted into it and cuts on both sides to avoid flattening and deformation of the continuous hollow material. The breaking knife first breaks at the punch outlet so that the punching knife passes through the break to cut, or the blade is rotated into an inverted V shape to avoid the blade from breaking and deforming the continuous hollow material.

Description

Technical Field

[0001] The invention relates to the technical field of continuous material cutting in an automated steel pipe production line, and in particular to a cutting mechanism that uses a blade to cut without removing material. Background Art

[0002] In the field of modern fully automatic steel pipe production lines, the tubular material needs to be rolled into a tube by a rolling mill, and then cut into a specified length by a cutting machine. The cutting machines in the prior art are mostly saw blade cutting machines, that is, a continuous tubular material is milled and cut by a disc-type saw blade under high-speed rotation. However, such a cutting machine is not only more expensive, but also has certain dangers due to the high-speed rotation of the saw blade. After the pipe is milled, a section of material will be lost, resulting in waste. In order to solve this problem, it is necessary to use a non-material removal method, that is, a blade cutting method, to complete such work. However, when the blade cuts the hollow tubular material, the pipe will be flattened and deformed as usual, which affects the quality of the cut. Therefore, in order to improve the quality of the cut by the blade, the technical personnel in this field have designed a cutting mechanism that will not flatten and deform the pipe as usual, which has become a trend in this industry. Summary of the invention

[0003] In order to improve the quality of the incision made by a non-material removal method, i.e., blade cutting, an embodiment of the present invention provides a cutting mechanism, which avoids flattening and deformation of the continuous hollow material by first making a break on the surface of the continuous hollow material with a breaking knife and then inserting a punching knife into the material to perform cutting operations on both sides, or by first making a break at the punching knife outlet and then passing the punching knife through the break to cut, or by rotating the blade into an inverted V shape.

[0004] On the one hand, a cutting mechanism is provided for cutting a stationary or moving continuous hollow material w, comprising a punching knife 1 and a knife seat 2, characterized in that a first breaking knife 3 is also provided, the punching knife 1 is also provided with a knife handle b and a first blade 11 and a second blade 12 for cutting tube walls in different directions, the first blade 11 and the second blade 12 are provided on both sides of the knife handle b, firstly, the first breaking knife 3 cuts the continuous hollow material w to expose the first opening k of the hollow inner wall, and then the first blade 11 and the second blade 12 of the punching knife 1 are inserted into the first opening k and gradually cut the continuous hollow material w along a certain trajectory as the knife handle b moves linearly.

[0005] According to one aspect of an embodiment of the present invention, a second breaking knife 4 is further provided, and the second breaking knife 4 is arranged on the opposite side of the first breaking knife 3. Before the punching knife 1 is inserted into the first opening k to cut the tube wall on the opposite side of the first opening k, the second breaking knife 4 can cut the continuous hollow material w to expose the second opening p of the hollow inner wall. The second opening p is arranged on the opposite side of the first opening k, and the front ends of the first blade 11 and the second blade 12 can be inserted into and pass through the second opening p.

[0006] According to one aspect of another embodiment of the present invention, a hinge shaft bj is further provided at the end of the handle b, the first blade 11 is provided on the first blade body 1a, the second blade 12 is provided on the second blade body 1b, and the first blade body 1a and the second blade body 1b are respectively hinged to the handle b through the hinge shaft bj to realize the rotation of the first blade 11 and the second blade 12 relative to the handle b.

[0007] According to one aspect of another embodiment of the present invention, after the handle b drives the first blade 11 to insert into the first opening k, the first blade body 1a gradually follows the handle b to gradually penetrate into the interior of the continuous hollow material w, while rotating relative to the handle b in the direction of movement of the handle b and driving the first blade 11 to rotate.

[0008] According to one aspect of another embodiment of the present invention, after the handle b drives the second blade 12 to insert into the first opening k, the second blade body 1b gradually follows the handle b to gradually penetrate into the interior of the continuous hollow material w, while rotating relative to the handle b in the direction of movement of the handle b and driving the second blade 12 to rotate.

[0009] According to one aspect of another embodiment of the present invention, when the first blade 11 and the second blade 12 are ready to completely cut the continuous hollow material w, the shape formed is an inverted V shape.

[0010] According to one aspect of the third embodiment of the present invention, after the handle b drives the first blade 11 to insert into the first opening k, the first blade body 1a follows the handle b to gradually penetrate into the interior of the continuous hollow material w, while rotating relative to the handle b in the direction opposite to the movement of the handle b and drives the first blade 11 to rotate, and the shape of the first blade 11 is a V-shape with a longer blade on one side.

[0011] According to one aspect of the third embodiment of the present invention, after the handle b drives the second blade 12 to insert into the first opening k, the second blade body 1b gradually follows the handle b to gradually penetrate into the interior of the continuous hollow material w, while rotating relative to the handle b in the direction opposite to the movement of the handle b and drives the second blade 12 to rotate, and the shape of the second blade 12 is a V-shape with a longer blade on one side.

[0012] According to one aspect of the third embodiment of the present invention, when the first blade 11 and the second blade 12 are ready to completely cut the continuous hollow material w, the shape formed is an inverted V shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0014] Description of the serial numbers: continuous hollow material w, punching knife 1, knife handle b, first blade 11, first knife body 1a, second blade 12, second knife body 1b, hinge shaft bj, knife seat 2, first breaking knife 3, first opening k, second breaking knife 4, second opening p, first connecting rod h1, second connecting rod h2, pulling shaft ca, guide groove da.

[0015] Figure 1 It is a schematic diagram of the basic structural layout of the first embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of a breach in Embodiment 1 of the present invention.

[0017] Figure 3 It is a schematic diagram of a punching knife 1 cutting down and inserting into a first breaking knife 3 according to an embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of a punching knife 1 cutting through a second slitting knife 4 according to an embodiment of the present invention.

[0019] Figure 5 It is a schematic diagram of the basic structural layout of the second embodiment of the present invention.

[0020] Figure 6 It is a schematic diagram of a breach in the second embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of the punching knife 1 cutting down and inserting into the first breaking knife 3 in the second embodiment of the present invention.

[0022] Figure 8 It is a schematic diagram of the rotational deformation of the punching knife 1 in the second embodiment of the present invention.

[0023] Fig. 9 It is a schematic diagram of the root cutting of the punching knife 1 during rotational deformation in the second embodiment of the present invention.

[0024] Fig.10 It is a schematic diagram of the basic structural layout of embodiment 3 of the present invention.

[0025] Fig.11 It is a schematic diagram of a breach in Embodiment 3 of the present invention.

[0026] Fig.12 It is a schematic diagram of the punching knife 1 cutting down and inserting into the first breaking knife 3 in the third embodiment of the present invention.

[0027] Fig.13 It is a schematic diagram of the rotational deformation of the punching knife 1 in the third embodiment of the present invention.

[0028] Fig.14 It is a schematic diagram of the root cutting by the rotational deformation of the punching blade 1 in the third embodiment of the present invention.

[0029] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0030] The following detailed description of the embodiments of the present invention is further described in detail in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the preferred embodiments described, and the scope of the present invention is defined by the claims.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified, “vertical” and “parallel” do not just have absolute meanings in a mathematical sense, but can be understood as “approximately vertical” and “approximately parallel”.

[0032] Figure 1 It is a schematic diagram of the basic structural layout of the first embodiment of the present invention.

[0033] according to Figure 1As shown, in order to improve the quality of the blade cutting incision in a non-material removal method, i.e., a blade cutting method, an embodiment of the present invention provides a cutting mechanism, by using a slitting knife to first slit the surface of the continuous hollow material so that the punching knife is inserted into it and cuts on both sides to avoid flattening and deforming the continuous hollow material, by first slitting the slitting knife at the punching knife outlet so that the punching knife passes through the slit to cut, or by using a blade rotating into an inverted V shape to avoid the blade from deforming the continuous hollow material. This embodiment illustrates the specific implementation method of this scheme through three embodiments, wherein the specific structure of this embodiment 1 includes a punching knife 1, a knife seat 2, a first slitting knife 3 and a second slitting knife 4, the punching knife 1 is also provided with a handle b and a first blade 11 and a second blade 12 for cutting pipe walls in different directions, the first blade 11 and the second blade 12 are arranged on both sides of the handle b and the first blade 11 and the second blade 12 are integrally arranged with the handle b, the first blade 11 and the second blade 12 form an acute angle with each other and form a sharp point or a smaller arc transition at the intersection. In order to make the cut more neat, the acute angle formed by the first blade 11 and the second blade 12 is symmetrical with respect to the handle b. The second slitting knife 4 is arranged on the opposite side of the first slitting knife 3. The first slitting knife 3 and the second slitting knife 4 can be in the form of a saw or a planer. They can cut the continuous hollow material w by moving left and right. When they pass through the surface of the continuous hollow material w, they can cut the continuous hollow material w to form a first opening k and a second opening p that can accommodate the sharp point or small arc at the intersection of the first blade 11 and the second blade 12. The knife seat 2 is two jaws that can clamp and fix the continuous hollow material w, and its side surface can be attached to the first blade 11 and the second blade 12 to form a cutting knife seat of the first blade 11 and the second blade 12, which is used to assist the first blade 11 and the second blade 12 in cutting the continuous hollow material w and prevent the continuous hollow material w from deforming.

[0034] Figure 2 It is a schematic diagram of a breach in Embodiment 1 of the present invention.

[0035] Figure 3 It is a schematic diagram of a punching knife 1 cutting down and inserting into a first breaking knife 3 according to an embodiment of the present invention.

[0036] Figure 4 It is a schematic diagram of a punching knife 1 cutting through a second slitting knife 4 according to an embodiment of the present invention.

[0037] according to Figure 2 , Figure 3 and Figure 4As shown, according to one aspect of the first embodiment of the present invention, the specific working process is that first, the first breaking knife 3 cuts the continuous hollow material w to expose the first opening k of the hollow inner wall, and then the first blade 11 and the second blade 12 of the punching knife 1 are inserted into the first opening k and gradually cut the tube walls on both sides of the continuous hollow material w as the handle b moves vertically downward in a straight line. At the same time, before the punching knife 1 is inserted into the first opening k to cut the tube wall on the opposite side of the first opening k, the second breaking knife 4 starts to work to cut the continuous hollow material w to expose the second opening p of the hollow inner wall. The second opening p is arranged on the opposite side of the first opening k, and the front ends of the blades of the first blade 11 and the second blade 12 can be inserted into and pass through the second opening p. The first blade 11 and the second blade 12 continue to move downward with the handle b to insert into and pass through the second opening p, and at the same time gradually cut all the tube walls on both sides of the continuous hollow material w, so that the continuous hollow material w is cut off.

[0038] Figure 5 It is a schematic diagram of the basic structural layout of the second embodiment of the present invention.

[0039] according to Figure 5 As shown, the specific implementation method of the second embodiment of the present invention is different from the specific technical feature of the first embodiment in that the punching knife 1 is also provided with a handle b and a first blade 11 and a second blade 12 for cutting the pipe wall in different directions, the first blade 11 and the second blade 12 are arranged on both sides of the handle b, and the end of the handle b is also provided with a hinge shaft bj, the first blade 11 is arranged on the first blade body 1a, and the second blade 12 is arranged on the second blade body 1b, and the first blade body 1a and the second blade body 1b are respectively hinged to the handle b through the hinge shaft bj to realize the rotation of the first blade 11 and the second blade 12 relative to the handle b. A long waist-shaped guide groove da is provided at the center position of the handle b, and a pulling shaft ca is provided in the guide groove da. A first connecting rod h1 is provided between the pulling shaft ca and the first blade body 1a, and the two ends of the first connecting rod h1 are respectively hinged to the pulling shaft ca and the end of the first blade body 1a. A second connecting rod h2 is provided between the pulling shaft ca and the second blade body 1b, and the two ends of the second connecting rod h2 are respectively hinged to the pulling shaft ca and the end of the second blade body 1b. By pulling the pulling shaft ca, the angular position change of the first blade 11 and the second blade 12 relative to the handle b can be achieved.

[0040] Figure 6 It is a schematic diagram of a breach in the second embodiment of the present invention.

[0041] Figure 7 It is a schematic diagram of the punching knife 1 cutting down and inserting into the first breaking knife 3 in the second embodiment of the present invention.

[0042] Figure 8 It is a schematic diagram of the rotational deformation of the punching knife 1 in the second embodiment of the present invention.

[0043] Fig. 9 It is a schematic diagram of the root cutting of the punching knife 1 during rotational deformation in the second embodiment of the present invention.

[0044] according to Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, according to one aspect of the second embodiment of the present invention, the specific working process is that the first cutting knife 3 first cuts the continuous hollow material w to expose the first opening k of the hollow inner wall, and then the first blade 11 and the second blade 12 of the punching knife 1 form a V-shaped blade and are inserted into the first opening k and gradually cut the tube walls on both sides of the continuous hollow material w as the handle b moves vertically downward. In addition, as the handle b moves, the pulling shaft ca is gradually pushed in the direction of the handle b, and the pulling shaft ca pushes the first connecting rod h1 and the second connecting rod h2 to move toward the handle b. The first connecting rod h1 will push the first blade body 1a to drive the first blade 11 to rotate in the moving direction of the blade handle b, and the second connecting rod h2 will push the second blade body 1b to drive the second blade 12 to rotate in the moving direction of the blade handle b. When the first blade 11 and the second blade 12 are ready to completely cut off the continuous hollow material w, the shape formed by them is an inverted V shape. As the blade handle b continues to move downward, the inverted V-shaped cutting edge formed by the first blade 11 and the second blade 12 can smoothly cut off the continuous hollow material w without forming a sharp edge break to affect the quality of the cut surface.

[0045] Fig.10 It is a schematic diagram of the basic structural layout of embodiment 3 of the present invention.

[0046] according to Fig.10As shown, the specific implementation of the third embodiment of the present invention is different from the specific technical features of the first embodiment in that the punching knife 1 is also provided with a handle b and a first blade 11 and a second blade 12 for cutting the pipe wall in different directions, the first blade 11 and the second blade 12 are arranged on both sides of the handle b, and the end of the handle b is also provided with a hinge shaft bj, the first blade 11 is arranged on the first blade body 1a, and the second blade 12 is arranged on the second blade body 1b, and the first blade body 1a and the second blade body 1b are respectively hinged with the handle b through the hinge shaft bj to realize the rotation of the first blade 11 and the second blade 12 relative to the handle b. Among them, the first blade body 1a and the second blade body 1b are both approximately triangular in shape, and the first blade 11 is arranged on the two sides of the first blade body 1a that are approximately triangular in shape and at the arc transition position between the two sides, and the second blade 12 is arranged on the two sides of the second blade body 1b that are approximately triangular in shape and at the arc transition position between the two sides. A long waist-shaped guide groove da is provided at the center position of the handle b, and a pulling shaft ca is provided in the guide groove da. A first connecting rod h1 is provided between the pulling shaft ca and the first blade body 1a, and the two ends of the first connecting rod h1 are respectively hinged to the pulling shaft ca and the end of the first blade body 1a. A second connecting rod h2 is provided between the pulling shaft ca and the second blade body 1b, and the two ends of the second connecting rod h2 are respectively hinged to the pulling shaft ca and the end of the second blade body 1b. By pulling the pulling shaft ca, the angular position of the first blade 11 and the second blade 12 relative to the handle b can be changed, and the shape of the cutting blade composed of the first blade 11 and the second blade 12 can be changed between a V-shape and an inverted V-shape.

[0047] Fig.11 It is a schematic diagram of a breach in Embodiment 3 of the present invention.

[0048] Fig.12 It is a schematic diagram of the punching knife 1 cutting down and inserting into the first breaking knife 3 in the third embodiment of the present invention.

[0049] Fig.13 It is a schematic diagram of the rotational deformation of the punching knife 1 in the third embodiment of the present invention.

[0050] Fig.14 It is a schematic diagram of the root cutting by the rotational deformation of the punching blade 1 in the third embodiment of the present invention.

[0051] according to Fig.11 , Fig.12 , Fig.13 and Fig.14As shown, according to one aspect of the third embodiment of the present invention, the specific working process is that the first breaking knife 3 first cuts the continuous hollow material w to expose the first opening k of the hollow inner wall, and then the first blade 11 and the second blade 12 of the punching knife 1 form a V-shaped blade and are inserted into the first opening k and gradually cut the tube walls on both sides of the continuous hollow material w as the handle b moves vertically downward. In addition, as the handle b moves, the pulling shaft ca is gradually pulled in the opposite direction of the movement of the handle b, and the pulling shaft ca will pull the first connecting rod h1 and the second connecting rod h2 to move in the opposite direction of the movement direction of the handle b. At the same time, the first connecting rod h1 will pull the first knife body 1a to drive the first blade 11 to move toward the handle b. The second connecting rod h2 will pull the second blade body 1b to drive the second blade 12 to rotate in the direction opposite to the moving direction of the handle b. While the first blade 11 and the second blade 12 gradually cut through the tube walls on both sides of the continuous hollow material w, the combined shape of the first blade 11 and the second blade 12 gradually changes from a V-shape to an inverted V-shape. When the first blade 11 and the second blade 12 are ready to completely cut off the continuous hollow material w, the shape formed is an inverted V-shape. As the handle b continues to move downward, the inverted V-shaped cutting edge formed by the first blade 11 and the second blade 12 can smoothly cut the continuous hollow material w without forming a sharp break to affect the quality of the cut surface.

[0052] It should be understood that the description of the specific embodiments of the present invention is exemplary and should not be interpreted as an improper limitation on the scope of protection of the present invention. The scope of protection of the present invention is defined by its claims and covers all embodiments and obvious equivalent variations falling within its scope.

Claims

1. A cutting mechanism for cutting a stationary or moving continuous hollow material (w), comprising a punch (1) and a cutter holder (2), characterized in that A first slitting knife (3) is also provided. The punching knife (1) is also provided with a knife handle (b) and a first blade (11) and a second blade (12) for cutting the tube wall in different directions. The first blade (11) and the second blade (12) are provided on both sides of the knife handle (b). First, the first slitting knife (3) cuts the continuous hollow material (w) to expose the first opening (k) of the hollow inner wall. Then, the first blade (11) and the second blade (12) of the punching knife (1) are inserted into the first opening (k) and gradually cut the continuous hollow material (w) along a certain trajectory as the knife handle (b) moves linearly. The end of the knife handle (b) is also provided with a hinge shaft (bj). The first blade (11) is provided on the first knife body (1a), and the second blade (12) is provided on the second knife body (1b). The first knife body (1a) and the second knife body (1b) are respectively connected by the hinge shaft. (bj) is hinged with the handle (b) to realize the rotation of the first blade (11) and the second blade (12) relative to the handle (b), wherein a long waist hole-shaped guide groove (da) is also provided at the center position of the handle (b), and a pulling shaft (ca) is also provided in the guide groove (da), and a first connecting rod (h1) is also provided between the pulling shaft (ca) and the first blade body (1a), and the two ends of the first connecting rod (h1) are respectively hinged to the pulling shaft (ca) and the end of the first blade body (1a), and a second connecting rod (h2) is also provided between the pulling shaft (ca) and the second blade body (1b), and the two ends of the second connecting rod (h2) are respectively hinged to the pulling shaft (ca) and the end of the second blade body (1b), and the angular position change of the first blade (11) and the second blade (12) relative to the handle (b) can be realized by pulling the pulling shaft (ca).

2. A cutting mechanism according to claim 1, characterized in that After the handle (b) drives the first blade (11) to be inserted into the first opening (k), the first blade body (1a) gradually follows the handle (b) to penetrate into the interior of the continuous hollow material (w) while rotating relative to the handle (b) in the direction of movement of the handle (b) and driving the first blade (11) to rotate.

3. A cutting mechanism according to claim 2, characterized in that After the handle (b) drives the second blade (12) to be inserted into the first opening (k), the second blade body (1b) gradually follows the handle (b) to penetrate into the interior of the continuous hollow material (w) while rotating relative to the handle (b) in the direction of movement of the handle (b) and driving the second blade (12) to rotate.

4. A cutting mechanism according to claim 3, characterized in that When the first blade (11) and the second blade (12) are ready to completely cut the continuous hollow material (w), the shape formed is an inverted V shape.

5. A cutting mechanism according to claim 1, characterized in that After the handle (b) drives the first blade (11) to be inserted into the first opening (k), the first blade body (1a) gradually moves deeper into the interior of the continuous hollow material (w) following the handle (b) while rotating relative to the handle (b) in the direction opposite to the movement of the handle (b) and driving the first blade (11) to rotate, and the first blade (11) is in the shape of a V with a longer blade on one side.

6. A cutting mechanism according to claim 5, characterized in that After the handle (b) drives the second blade (12) to be inserted into the first opening (k), the second blade body (1b) gradually moves deeper into the interior of the continuous hollow material (w) following the handle (b) while rotating relative to the handle (b) in a direction opposite to the movement of the handle (b) and driving the second blade (12) to rotate, and the shape of the second blade (12) is a V-shape with a longer blade on one side.

7. A cutting mechanism according to claim 6, characterized in that When the first blade (11) and the second blade (12) are ready to completely cut the continuous hollow material (w), the shape formed is an inverted V shape.

Images