Roller of perforating machine

Abstract

The utility model relates to the technical field of hot-rolling seamless steel pipe equipment, and discloses a puncher roller which comprises a roller body, a guide-in part and a guide-out part, a bite-in opening of the leading-in part is provided with a curve section, a round billet smoothly enters the leading-in part through the bite-in opening, the end, close to the leading-out part, of the curve section is tangent to the outer surface of the leading-in part, the end, away from the leading-out part, of the curve section is connected with the outer surface of the leading-in part, the projection length of the line section along the X axis is 35-45 mm, and the projection length of the curve section along the Y axis is 40-45 mm. The device has the beneficial effects that when entering the gripping opening of the leading-in part, a round billet can be smoothly gripped and smoothly transited to enter through the curve section, so that the smooth perforation is realized, the contact abrasion of the round billet and the gripping section of the roller is effectively avoided, the service life of the roller is prolonged, the smoothness of the curve section is increased, and the abrasion of the gripping section of the roller is avoided. Protrusions are generated due to the steep curve section, so that the surface of the perforated steel pipe is spirally scratched.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-rolled seamless steel pipe equipment, specifically a piercing mill roll. Background Technology

[0002] Rolls are an important component of a piercing mill. Their function is to drive the round billet to rotate and advance, so that the billet can be deformed and rolled into shape within the enclosed space formed by the mandrel, guide plate, and rolls. However, when the inlet section of the piercing mill rolls wears down, the inlet edge protrudes. When the surface of the pierced round billet comes into contact with the protruding part of the inlet edge, it causes spiral scratches on the surface of the pierced steel pipe, resulting in serious quality problems. Utility Model Content

[0003] The purpose of this utility model is to provide a piercing mill roll to solve the problem in the background art where the inlet section of the piercing mill roll is easily worn, causing spiral scratches on the surface of the pierced steel pipe.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A piercing mill roll includes: a roll body, the roll body comprising an inlet section for introducing a round billet and an outlet section for exporting the round billet; the bite inlet of the inlet section has a curved section for the round billet to smoothly enter the inlet section through the bite inlet, one end of the curved section near the outlet section being tangent to the outer surface of the inlet section, and the other end of the curved section away from the outlet section being connected to the outer surface of the inlet section, the projected length of the curved section along the X-axis being 35-45 mm, and the projected length of the curved section along the Y-axis being 40-45 mm. With this configuration, when the round billet enters the bite inlet of the inlet section, it can be smoothly bitten and transitioned through the curved section, achieving smooth piercing, effectively avoiding contact wear between the round billet and the bite section of the roll, and improving the service life of the roll.

[0006] Furthermore, the curved segment is an arc segment with a radius of 41mm. This setting effectively increases the inlet radius of the roll, preventing the arc segment from protruding due to insufficient radius after wear of the roll biting section, which would cause the arc segment of the roll to contact the surface of the billet and cause spiral scratches.

[0007] Furthermore, the included angle γ of the bite opening of the inlet portion is 106° to 107°. This setting allows the bite opening γ to be adjusted to a larger range without affecting the fit with the roller shaft, facilitating the setting of curved segments.

[0008] Furthermore, the angle α between the outer surface of the inlet portion and the horizontal plane is 18.3° to 18.5°, and the angle β between the outer surface of the outlet portion and the horizontal plane is 12° to 12.2°, and both the inlet portion and the outlet portion are conical. Setting the inlet portion and the outlet portion to suitable shapes facilitates the introduction and export of the round blank.

[0009] Furthermore, the outer surface of the inlet portion has multiple knurled segments connected in sequence, and the knurling depth of the multiple knurled segments gradually decreases along the direction from the inlet portion to the outlet portion. By setting the knurled segments, the friction between the blank and the inlet portion is increased, effectively preventing the inlet portion from separating from or slipping on the blank, and ensuring the smooth progress of the piercing operation.

[0010] Furthermore, a transition zone is provided between the inlet and outlet portions to prevent sharp edges from forming when the inlet and outlet portions come into contact.

[0011] Furthermore, the center of the roll body has a through hole for connecting the roll shaft.

[0012] Furthermore, the inner wall of the through hole has a first stepped section near the end of the inlet portion to increase the contact area between the roller shaft and the roll body.

[0013] Furthermore, the inner wall of the through hole has a second stepped section at the end near the outlet, which is used to increase the contact area between the roller shaft and the roll body.

[0014] This invention has the following advantages over the prior art:

[0015] 1. The piercing mill roll of this utility model has a curved section at the bite inlet of the inlet section. The end of the curved section near the outlet section is tangent to the outer surface of the inlet section. When the round billet enters the bite inlet of the inlet section, it can be smoothly bitten and smoothly transitioned through the curved section, so that the piercing can be carried out smoothly. This effectively avoids contact wear between the round billet and the bite section of the roll and improves the service life of the roll. At the same time, the projection length of the curved section along the X-axis is adjusted to 35-45mm and the projection length along the Y-axis is adjusted to 40-45mm to increase the smoothness of the curved section and avoid the spiral scratch on the surface of the pierced steel pipe caused by the steepness of the curved section after the bite section of the roll wears out. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the piercing mill roll in an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0019] In the diagram: 1. Roll body; 2. Inlet section; 3. Outlet section; 4. Curved section; 5. Knurled section; 6. Transition zone; 7. Through hole; 8. First step section; 9. Second step section. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation 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.

[0022] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0024] Example:

[0025] like Figures 1 to 3As shown, this utility model provides a piercing mill roll, including: a roll body 1, the roll body 1 including an inlet section 2 for introducing a round billet and an outlet section 3 for exporting the round billet; the bite opening of the inlet section 2 has a curved section 4, which allows the round billet to smoothly enter the inlet section 2 through the bite opening. The curved section 4 does not affect the normal deformation of the round billet during the piercing process. The end of the curved section 4 near the outlet section 3 is tangent to the outer surface of the inlet section 2, and the end of the curved section 4 away from the outlet section 3 is connected to the outer surface of the inlet section 2, so that when the round billet enters the bite opening of the inlet section 2, it can be smoothly bitten and smoothly transitioned into the roll through the curved section 4, realizing smooth piercing, effectively avoiding contact wear between the round billet and the bite section of the roll, and improving the service life of the roll; specifically, the projected length of the curved section along the X-axis is 35-45mm, and the projected length of the curved section along the Y-axis is 40-45mm. This setting increases the smoothness of curve segment 4, preventing the steep curve segment from causing spiral scratches on the surface of the perforated steel pipe after the roll biting section wears down.

[0026] Specifically, the curved segment 4 is an arc segment with a radius of 41mm. This setting effectively increases the inlet radius of the roll, preventing the arc segment from protruding due to insufficient radius after wear of the roll biting section, which would cause the arc segment of the roll to contact the surface of the billet and cause spiral scratches.

[0027] In this embodiment, both the inlet portion 2 and the outlet portion 4 are conical. The small-diameter end of the inlet portion 2 is provided with a curved segment 4, and the large-diameter end of the inlet portion 2 is connected to the small-diameter end of the outlet portion 3. The large-diameter end of the outlet portion 3 is provided with an outlet angle (or a smooth curved segment). The included angle α between the outer surface of the inlet portion and the horizontal plane is 18.3° to 18.5°, preferably 18.5°. The included angle β between the outer surface of the outlet portion and the horizontal plane is 12° to 12.2°, preferably 12°. Setting the inlet and outlet portions to suitable shapes facilitates the introduction and exit of the round blank and ensures the forming quality of the perforated steel pipe. A transition zone 6 is provided between the inlet portion 2 and the outlet portion 4 to prevent the inlet portion 2 from forming a sharp edge when it connects with the outlet portion 3, thus avoiding scratching the round blank. The included angle γ of the bite-in of the inlet portion is 106° to 107°, preferably 106.7°. Without affecting the fit with the roller, adjust the bite γ to a larger range to facilitate setting the curve segment.

[0028] Specifically, the outer surface of the inlet portion 2 has multiple knurled segments 5 connected in sequence, and the knurling depth of the multiple knurled segments 5 gradually decreases along the direction from the inlet portion 2 to the outlet portion 3. For example... Figure 1As shown, the knurling depth of the knurling section 5 near the small diameter end of the inlet section 2 is 1.2 mm, and the knurling depth of the subsequent knurling sections is 0.7 mm. The knurling depth gradually decreases along the direction from the inlet section 2 to the outlet section 3. By setting the knurling section 5, the friction between the blank and the inlet section is increased, which effectively prevents the inlet section 2 and the blank from separating or slipping, and ensures that the piercing work is carried out smoothly.

[0029] The roll body 1 has a through hole 7 at its center for connecting the roll shaft. The inner wall of the through hole 7, near the end of the inlet portion 2, has a first stepped section 8 to increase the contact area between the roll shaft and the roll body 1. The inner wall of the through hole 7, near the end of the outlet portion 3, has a second stepped section 9 to further increase the contact area between the roll shaft and the roll body 1. The end face of the outlet portion 3 at its large diameter end is also provided with a fixing hole for fixed connection with the roll shaft. By providing the first stepped section 8, the second stepped section 9, and the fixing hole, the connection stability between the roll shaft and the roll body can be increased, ensuring smooth piercing operation.

[0030] In practice: After the round billet is bitten into the curved section 4 of the upper and lower rolls of the piercing mill, it is held by the outer circumference of the inlet section 2 and continuously conveyed to the outlet section 3. The piercing mill mandrel continuously pierces the round billet along the outlet section 3 towards the inlet section 2. The curved section 4 no longer contacts the round billet during the piercing process and will not affect the normal deformation of the round billet. By setting the curved section 4, contact wear between the round billet and the roll biting section can be effectively avoided, improving the service life of the rolls. Moreover, by increasing the smoothness of the curved section 4, the steepness of the curved section itself can be prevented from causing protrusions after the roll biting section wears out, thus avoiding spiral scratches on the surface of the pierced steel pipe.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piercing mill roll, characterized in that, The utility model relates to a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

2. The piercing mill roll according to claim 1, characterized in that: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

3. The piercing mill roll defined in claim 1, characterized in that: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

4. The piercing mill roll defined in claim 1, wherein: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

5. The piercing mill roll defined in claim 1, wherein: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

6. The piercing mill roll defined in claim 1, wherein: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

7. The piercing mill roll according to claim 6, characterized in that: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

8. The piercing mill roll defined in claim 1, wherein: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

9. The piercing mill roll according to claim 8, characterized in that: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing.

10. The piercing mill roll according to claim 9, characterized in that: The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model discloses a rolling roller body and a rolling roller shaft, and relates to the technical field of rolling roller manufacturing. The utility model disc

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