A guide plate for a perforating machine

Abstract

The utility model discloses a guide plate for perforating machine, include: guide plate body, the one end of guide plate body is provided with the entry cone, and the other end is provided with the exit cone, along the entry cone and is provided with several circular arc sections to the direction of exit cone, the circular arc angle of several circular arc sections gradually reduces from the direction of entry cone to exit cone. Compared with the design of only one angle of the entry cone of traditional guide plate, when the entry cone angle is too large, the guide plate can be prevented from being injured by the contact between the blank and the roll, and the spiral outer folding of the rough pipe after the perforation in the perforating machine is avoided, when the entry cone angle is too small, the blank and the roll contact at the same time and the guide plate, which leads to the blank unable to rotate and the roll jamming, the uniformity of the guide plate wear is improved, the perforation deformation stability is ensured, the rough pipe spiral outer folding rate is reduced, the roll jamming frequency is reduced, the blank can rotate forward smoothly, and the use demand of the perforating machine can be met.

Description

Technical Field

[0001] This utility model belongs to the field of perforation machine technology, specifically a guide plate for a perforation machine. Background Technology

[0002] The piercing mill, as a key piece of equipment in the production of seamless steel pipes, plays a crucial role in the entire steel pipe manufacturing process. Its main purpose is to process solid billets into hollow tubes, laying the foundation for subsequent rolling and processing steps. During the production of seamless steel pipes, the piercing mill, through the rotation of the rolls and the action of the mandrel, causes the billet to undergo plastic deformation at high temperatures, gradually forming a tube with a certain inner diameter and wall thickness. The guide plate, as an important thermal tool of the piercing mill, guides the solid billet and limits the outer diameter of the tube, ensuring the piercing quality of the billet.

[0003] Chinese patent CN117086119A discloses a guide plate for a piercing mill and its manufacturing method. The bottom of this alloy guide plate has a wear-resistant layer. This smooth wear-resistant layer not only prevents wear on the guide plate body but also provides better guidance. The alloy guide plate layer is susceptible to high heat during use, and internal channels are provided for heat dissipation, extending the service life of the guide plate body. However, the inlet cone of this guide plate uses only a single angle design. When the inlet cone angle is too large, the billet will inevitably collide with the high points of the inlet and outlet cones during its contact with the rolls and rotation, causing damage to the guide plate and resulting in spiral outward bending of the tube after piercing. Conversely, when the inlet cone angle is too small, the billet contacts the guide plate simultaneously with the rolls, preventing the billet from rotating and causing jamming, leading to production interruptions, reduced production efficiency, and failure to meet the requirements of the piercing mill.

[0004] Therefore, there is an urgent need for a guide plate for piercing machines to improve the uniformity of guide plate wear, ensure stable piercing deformation, reduce the outward folding rate of the tube spiral, reduce the number of jamming cycles, and ensure that the billet can rotate and move forward smoothly, thus meeting the usage requirements of piercing machines. Utility Model Content

[0005] The purpose of this utility model is to provide a guide plate for a punching machine to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A guide plate for a punching machine, comprising: A guide plate body, wherein an inlet cone is provided at one end of the guide plate body and an outlet cone is provided at the other end; Several arc segments are provided along the inlet cone and toward the outlet cone; The arc angle of several of the aforementioned arc segments gradually decreases from the inlet cone to the outlet cone.

[0007] The guide plate for the perforating machine according to the present invention has at least the following technical effects: This piercing mill guide plate features several arc segments at one end of the guide plate body, extending from the inlet cone towards the outlet cone. The arc angle of these segments gradually decreases from the inlet cone to the outlet cone. Compared to traditional guide plates with only one segment at the inlet cone, this design prevents damage to the guide plate caused by contact between the billet and the rolls when the inlet cone angle is too large. It also prevents the tube from spiraling outwards after piercing within the mill. Furthermore, it prevents the billet from contacting the guide plate simultaneously with the rolls when the inlet cone angle is too small, thus preventing the billet from rotating and causing jamming. This effectively improves the uniformity of guide plate wear, ensures stable piercing deformation, reduces the spiral outwards rate of the tube, and decreases the number of jamming incidents, ensuring smooth rotation and forward movement of the billet, thus meeting the requirements of the piercing mill.

[0008] As a further embodiment of this utility model: the plurality of arc segments include a first arc segment, a second arc segment and a third arc segment arranged sequentially, and the arc angle gradually decreases from the first arc segment to the third arc segment.

[0009] As a further embodiment of this utility model, the arc angle of the first arc segment is 10°-14°.

[0010] As a further embodiment of this utility model, the arc angle of the second arc segment is 4°-5°.

[0011] As a further embodiment of this utility model, the arc angle of the third arc segment is 1.4°-2°.

[0012] The system comprises several arc segments, including a first arc segment, a second arc segment, and a third arc segment arranged sequentially. The arc angle gradually decreases from the first arc segment to the third arc segment, with the first arc segment having an arc angle of 10°-14°, the second arc segment having an arc angle of 4°-5°, and the third arc segment having an arc angle of 1.4°-2°. The first arc segment serves as a guide for the billet entering the piercing mill, aligning it with the center of the rolls and reducing uneven wall thickness at the tube head. Furthermore, at the end of the first arc segment, the billet begins to rotate upon contact with the rolls, allowing it to begin contact with the mandrel at the second arc segment. As the billet head deforms, its circumference increases, and it gradually contacts the middle of the guide plate body at the midpoint of the second arc segment, ensuring the stability of the billet deformation. At the same time, the arc angle of the third arc segment makes the deformation of the billet and guide plate smooth and gradually compressed when they rotate forward, preventing violent compression and avoiding defects such as internal stress concentration and surface cracks caused by violent compression. This ensures the uniformity of the microstructure of the capillary tube and improves its physical properties and surface quality. In addition, it effectively avoids the direct impact of the billet on the high point of the inlet cone, effectively protecting the guide plate body and extending its service life.

[0013] As a further embodiment of this utility model, the second arc segment is smoothly connected to the first arc segment and the third arc segment.

[0014] By smoothly connecting the second arc segment with the first and third arc segments respectively, the movement trajectory of the billet can be made continuous and natural, preventing the billet from getting stuck or even unable to move forward smoothly, which would affect the normal progress of the piercing process and ensure that the billet can rotate and move forward continuously and stably.

[0015] As a further embodiment of this utility model: the length of the first arc segment is 90mm-110mm, the length of the second arc segment is 70mm-90mm, and the length of the third arc segment is 40mm-60mm.

[0016] The first arc segment, with a length of 90mm-110mm (preferably 100mm), provides sufficient guiding distance for the billet to enter the piercing mill, allowing it to more accurately align with the center of the rolls. This ensures uniform force distribution during subsequent piercing, effectively reducing uneven wall thickness at the tube head and improving dimensional accuracy and quality stability. The second arc segment, with a length of 70mm-90mm (preferably 80mm), allows sufficient space for the billet to deform properly after contacting the mandrel, resulting in a more thorough and uniform deformation process. This helps improve the internal structure of the tube and enhances its overall quality and performance. The third arc segment, with a length of 40mm-60mm (preferably 50mm), enables the billet to undergo gentle compression as it rotates and advances in contact with the guide plate. This avoids excessive compression that could cause cracks, wrinkles, or other defects on the tube surface, ensuring smoothness and integrity and improving the product's appearance quality.

[0017] As a further improvement of this utility model, the guide plate body is made of alloy steel with a hardness of HRC45-HRC55.

[0018] Because the guide plate body is made of alloy steel with a hardness of HRC45-HRC55, it can withstand the enormous pressure and friction generated by the billet during piercing. This hardness effectively resists wear during the high-speed rotation of the billet and its contact with the guide plate, ensuring the integrity of the guide plate surface, reducing dimensional changes and increased surface roughness caused by wear, and ensuring the guide plate body maintains good working condition for a longer period.

[0019] As a further improvement of this utility model, a nitrided layer is provided on the surface of the guide plate body.

[0020] As a further improvement of this utility model, the thickness of the nitrided layer is 0.2mm-0.5mm.

[0021] By setting a nitriding layer on the surface of the guide plate body, with a thickness of 0.2mm-0.5mm, the nitriding layer has high hardness, which can significantly enhance the wear resistance of the guide plate body surface. During the piercing process, the blank will generate severe friction with the surface of the guide plate body, and the nitriding layer can effectively resist wear, maintain the smoothness and dimensional accuracy of the guide plate body surface, enable the guide plate body to work stably for a longer period of time, improve the service life of the guide plate body, and reduce the need for frequent guide plate replacement due to wear. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 A schematic diagram of a three-dimensional structure of a guide plate for a punching machine; Figure 2 This is a side view of a guide plate structure for a perforating machine.

[0024] Figure label: 1. Guide plate body; 101. Inlet cone; 102. Outlet cone; 103. First arc segment; 104. Second arc segment; 105. Third arc segment. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] like Figure 1 and Figure 2 The present invention provides a guide plate for a perforating machine, comprising: a guide plate body 1, an inlet cone 101 at one end of the guide plate body 1 and an outlet cone 102 at the other end; a plurality of arc segments are provided along the inlet cone 101 and toward the outlet cone 102; the arc angle of the plurality of arc segments gradually decreases from the inlet cone 101 to the outlet cone 102.

[0032] Specifically, the guide plate of this piercing mill has several arc segments set at the inlet cone 101 at one end of the guide plate body 1 and in the direction towards the outlet cone 102. The arc angle of these arc segments gradually decreases from the inlet cone 101 to the outlet cone 102. Compared with the traditional guide plate design where the inlet cone has only one angle, this application can prevent the billet from contacting the rolls and causing the guide plate to be damaged when the inlet cone 101 angle is too large, and also avoid the tube from spiraling outward after the guide plate is pierced in the piercing mill. It can also prevent the billet from contacting the guide plate at the same time as contacting the rolls when the inlet cone 101 angle is too small, which would cause the billet to be unable to rotate and cause jamming. This effectively improves the uniformity of guide plate wear, ensures stable piercing deformation, reduces the spiral outward rate of the tube, and reduces the number of jamming incidents, ensuring that the billet can rotate and move forward smoothly, thus meeting the usage requirements of the piercing mill.

[0033] Furthermore, such as Figure 1 and Figure 2 As shown, the arc segments include a first arc segment 103, a second arc segment 104, and a third arc segment 105 arranged sequentially. The arc angle gradually decreases from the first arc segment 103 to the third arc segment 105. The arc angle of the first arc segment 103 is 10°-14°, the arc angle of the second arc segment 104 is 4°-5°, and the arc angle of the third arc segment 105 is 1.4°-2°.

[0034] Specifically, since the several arc segments include a first arc segment 103, a second arc segment 104, and a third arc segment 105 arranged sequentially, the arc angle gradually decreases from the first arc segment 103 to the third arc segment 105. The arc angle of the first arc segment 103 is 10°-14°, the arc angle of the second arc segment 104 is 4°-5°, and the arc angle of the third arc segment 105 is 1.4°-2°. The first arc segment 103 serves as a guide for the billet entering the piercing mill, guiding the billet to align with the center of the rolls and reducing uneven wall thickness at the tube head. Furthermore, at the end of the first arc segment 103, the billet begins to rotate upon contact with the rolls, causing the billet to... The second arc segment 104 begins to contact the mandrel, increasing the deformation circumference of the billet head. It gradually contacts the middle of the guide plate body 1 at the midpoint of the second arc segment 104, ensuring the stability of the billet deformation. Simultaneously, the arc angle of the third arc segment 105 ensures smooth deformation and gradual compression as the billet rotates and advances in contact with the guide plate, preventing severe compression and avoiding defects such as internal stress concentration and surface cracks caused by intense compression. This ensures a uniform microstructure of the capillary tube, improving its physical properties and surface quality. Furthermore, it effectively prevents direct impact of the billet on the inlet cone's highest point, effectively protecting the guide plate body 1 and extending its service life.

[0035] Furthermore, the second arc segment 104 is smoothly connected to the first arc segment 103 and the third arc segment 105.

[0036] Specifically, by smoothly connecting the second arc segment 104 with the first arc segment 103 and the third arc segment 105 respectively, the movement trajectory of the billet can be made continuous and natural, preventing the billet from getting stuck or even unable to move forward smoothly, affecting the normal progress of the piercing process, and ensuring that the billet can rotate and move forward continuously and stably.

[0037] Furthermore, the length of the first arc segment 103 is 90mm-110mm, the length of the second arc segment 104 is 70mm-90mm, and the length of the third arc segment 105 is 40mm-60mm.

[0038] Specifically, the length of the first arc segment 103 is 90mm-110mm, preferably 100mm, which provides sufficient guiding distance for the billet to enter the piercing mill, allowing the billet to be more accurately aligned with the center of the rolls, ensuring uniform force during subsequent piercing, thereby effectively reducing the problem of uneven wall thickness at the tube head and improving the dimensional accuracy and quality stability of the tube head; the length of the second arc segment 104 is 70mm-90mm, preferably 80mm, which allows the billet sufficient space to complete reasonable deformation after contacting the mandrel, making the deformation process more thorough and uniform, which helps to improve the internal structure of the tube and improve its overall quality and performance; the length of the third arc segment 105 is 40mm-60mm, preferably 50mm, which allows the billet to achieve smooth compression when rotating forward in contact with the guide plate, avoiding excessive compression that could cause defects such as cracks and wrinkles on the tube surface, ensuring the smoothness and integrity of the tube surface, and improving the appearance quality of the product.

[0039] According to an embodiment of this utility model, the guide plate body 1 is made of alloy steel with a hardness of HRC45-HRC55.

[0040] Specifically, because the guide plate body 1 is made of alloy steel with a hardness of HRC45-HRC55, it can withstand the enormous pressure and friction generated by the billet during the piercing process. During the high-speed rotation of the billet and its contact with the guide plate, this hardness effectively resists wear, ensuring the integrity of the guide plate body 1 surface, reducing dimensional changes and increased surface roughness caused by wear, and ensuring that the guide plate body 1 maintains a good working condition for a longer period of time.

[0041] Furthermore, a nitrided layer is provided on the surface of the guide plate body 1, and the thickness of the nitrided layer is 0.2mm-0.5mm.

[0042] Specifically, a nitriding layer is provided on the surface of the guide plate body 1, and the thickness of the nitriding layer is 0.2mm-0.5mm. The nitriding layer has high hardness, which can significantly enhance the wear resistance of the surface of the guide plate body 1. During the piercing process, the blank will generate severe friction with the surface of the guide plate body 1, and the nitriding layer can effectively resist wear, maintain the smoothness and dimensional accuracy of the surface of the guide plate body 1, enable the guide plate body 1 to work stably for a longer period of time, improve the service life of the guide plate body 1, and reduce the need for frequent replacement of the guide plate due to wear.

[0043] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A guide plate for a punching machine, characterized in that, include: The guide plate body (1) has an inlet cone (101) at one end and an outlet cone (102) at the other end. A plurality of arc segments are provided along the inlet cone (101) and toward the outlet cone (102); The arc angle of several of the arc segments gradually decreases from the inlet cone (101) to the outlet cone (102).

2. The guide plate for a perforating machine according to claim 1, characterized in that, The plurality of said arc segments include a first arc segment (103), a second arc segment (104) and a third arc segment (105) arranged in sequence, with the arc angle gradually decreasing from the first arc segment (103) to the third arc segment (105).

3. The guide plate for a perforating machine according to claim 2, characterized in that, The arc angle of the first arc segment (103) is 10°-14°.

4. The guide plate for a perforating machine according to claim 3, characterized in that, The arc angle of the second arc segment (104) is 4°-5°.

5. The guide plate for a perforating machine according to claim 4, characterized in that, The arc angle of the third arc segment (105) is 1.4°-2°.

6. The guide plate for a perforating machine according to claim 5, characterized in that, The second arc segment (104) is smoothly connected to the first arc segment (103) and the third arc segment (105).

7. The guide plate for a perforating machine according to claim 6, characterized in that, The length of the first arc segment (103) is 90mm-110mm, the length of the second arc segment (104) is 70mm-90mm, and the length of the third arc segment (105) is 40mm-60mm.

8. The guide plate for a perforating machine according to any one of claims 1 to 7, characterized in that, The guide plate body (1) is made of alloy steel with a hardness of HRC45-HRC55.

9. The guide plate for a perforating machine according to claim 8, characterized in that, The surface of the guide plate body (1) is provided with a nitrided layer.

10. The guide plate for a perforating machine according to claim 9, characterized in that, The thickness of the nitrided layer is 0.2mm-0.5mm.

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