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CN-116727465-B - Positioning device for tube blank perforation

CN116727465BCN 116727465 BCN116727465 BCN 116727465BCN-116727465-B

Abstract

The invention discloses a positioning device for perforating a tube blank, which comprises a tube blank, a receiving groove and a positioning component, wherein the positioning component comprises a steel pusher, a guide disc, a roller, a conical plug and a horizontally placed hub, the tube blank enters the roller to be slightly reduced in diameter under the pushing of the steel pusher, the tube blank enters the hub and is tangent to the hub, the upper end part of a push rod close to the conical plug is tangent to the hub, the lower end part of the push rod far away from the conical plug is connected with a push rod trolley, the push rod trolley is provided with a thrust seat for controlling the push rod to horizontally move, the push rod trolley pushes the conical plug to a position to be perforated, the hub is driven to continuously rotate and move forwards under the action of a rotating source, the push rod trolley controls the thrust seat to slowly and horizontally retract, the center of the tube blank and a rolling line of the plug always keep the same horizontal line, and the wall thickness after perforation is uniform due to deviation of vibration.

Inventors

  • SU YU
  • LI NING

Assignees

  • 济南铭锐科技设备有限公司

Dates

Publication Date
20260505
Application Date
20230615

Claims (5)

  1. 1. A positioning device for piercing a tube blank, comprising: a tube blank (1), wherein the tube blank (1) is a solid round tube blank; a receiving groove; The front end of the steel pusher is provided with a rotatable steel pushing head, the rear end of the steel pusher is provided with a pinch roll, and the steel pusher is positioned at one receiving side; A positioning assembly, the positioning assembly comprising: The guide disc is of an opening circular structure, the inner diameter of the inlet end and the outlet end of the guide disc is equal to the outer diameter of the tube blank (1), and one end of the guide disc is connected with the pusher; The rollers (2) are used for biting the tube blank (1), the rollers (2) are close to the other end of the guide disc and are symmetrically distributed on two sides of the guide disc, and the distance between the two rollers (2) is slightly smaller than the outer diameter of the tube blank; The device comprises a tube blank (1), a top head (4) concentrically moving with the tube blank (1), a top rod (5) and a horizontally placed hub (3), wherein the tail end of the top head (4) is movably connected with the top end of the top rod (5), the nose part of the top rod (4) is positioned at the center line position of a compression belt of the roller (2), the hub (3) is positioned between the rollers (2) and the height of the hub (3) is equal to the distance between the rollers (2), the hub (3) is tangent to the tube blank (1) and performs circular movement, the upper end of the top rod (5) is tangent to the hub (3), the lower end of the top rod (5) is connected with a top rod trolley, and the top rod trolley is provided with a thrust seat for controlling the top rod (5) to horizontally move, and the diameter of the top rod (5) is slightly lower than the height of the hub (3); The hub (3) is concave, the hub (3) comprises a rim arranged on the surface of the hub (3) and a transmission shaft arranged at the center of the hub (3), and the hub (3) is connected with a rotation source through the transmission shaft.
  2. 2. A positioning device for piercing of tube blanks according to claim 1, wherein the rolls (2) are two-section barrel rolls and the inlet and outlet sections of the rolls (2) are provided with rolling strips.
  3. 3. The positioning device for tube billet perforation according to claim 2, further comprising a worm gear movably connected with the roller (2), wherein the worm gear is connected with a driving motor and acts on the roller (2) inlet cone and the roller outlet cone respectively.
  4. 4. A positioning device for piercing of tubular blanks according to claim 1, wherein the plug (4) is a conical plug and the conical plug is screwed with the ejector rod (5).
  5. 5. The positioning device for piercing of pipe blanks according to claim 1, further comprising centering rollers provided in the rear end of the ejector pins (5) for fixing the ejector pins (5), the centering rollers comprising 1 upper centering roller and 2 small centering rollers and three being arranged at 120 ° to each other, the ejector pins (5) penetrating the center of the centering rollers.

Description

Positioning device for tube blank perforation Technical Field The invention belongs to the technical field of steel tube rolling, and particularly relates to a positioning device for tube blank perforation. Background The seamless steel pipe is made of monolithic metal, and is produced through the steps of forming hollow blank pipe with solid pipe blank or steel ingot, hot rolling, cold rolling or cold drawing, and the seamless steel pipe is used mainly as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, aviation, etc. In the production of seamless steel pipes, the perforating process is used for perforating a solid pipe blank into a hollow blank pipe, and the whole production process generally comprises the steps of perforating, pipe rolling and sizing and reducing. The perforation is used as the first procedure of metal deformation, the wall thickness of the penetrated pipe is thicker, the length is shorter, and the quality of the inner surface and the outer surface is poor, so that the perforated pipe is called a capillary, if some defects exist on the capillary, the defects are difficult to eliminate or lighten through the later procedures, and the perforation procedure plays an important role in the modern steel pipe production. However, the inventor of the present application has found that the above-mentioned technique has at least the following technical problems in the process of implementing the technical proposal of the embodiment of the present application, in which, in the process of piercing, the tube blank and the plug move concentrically, the tube blank is processed by the roller after passing through the conduit, and is contacted with the plug, in the process, there is a partial space, and the tube blank conveying process generates partial offset due to vibration, so that the center of the tube blank and the rolling line of the plug are dislocated, and the wall thickness after piercing is uneven. Disclosure of Invention Aiming at the defects of the prior art, the embodiment of the application solves the technical problem that the center of the tube blank is misplaced with a plug rolling line due to partial deviation generated in the tube blank conveying process due to vibration, so that the wall thickness is uneven after perforation by providing the positioning device for tube blank perforation. The embodiment of the application provides a positioning device for perforating a tube blank, which comprises a tube blank, a receiving groove, a steel ejector and a positioning component, wherein the tube blank is a solid round tube blank, the front end of the steel ejector is provided with a rotatable steel ejector, the rear end of the steel ejector is provided with a pinch roll, the steel ejector is positioned at one side of the receiving groove, the speed of the steel ejector can be set to be close to the front of a roller to advance at a high speed so as to save time, the speed of the steel ejector is reduced when the steel ejector is close to the roller to adapt to the biting condition of the tube blank, the positioning component comprises a guide disc, a roller for biting the tube blank, a top head and a horizontally placed hub, the guide disc is of an open round structure, the inner diameter of the inlet end and the outlet end of the guide disc is equal to the outer diameter of the tube blank, one end of the guide disc is connected with the steel ejector, the rollers are close to the other end of the guide disc and are symmetrically distributed at two sides of the guide disc, the distance between the top head and the hub is slightly smaller than the outer diameter, the top head is movably connected with the hub, the top head is positioned between the top head and the hub, the top head is slightly tangential to the hub, and the hub is in a tangential position between the hub and the hub is kept to move, and the hub is slightly tangential to the hub, and the hub is moved between the hub and the hub is slightly tangential to the hub and the hub. Preferably, the embodiment of the application also discloses that the hub is concave, the hub comprises a rim arranged on the surface of the hub and a transmission shaft arranged in the center of the hub, and the hub is connected with a rotation source through the transmission shaft. Preferably, the embodiment of the application also discloses that the roller is a two-section barrel-shaped roller, and the inlet end and the outlet section of the roller are provided with rolling belts. Preferably, the embodiment of the application also discloses a worm gear movably connected with the roller, wherein the worm gear is connected with a driving motor and acts on the roller inlet cone and the roller outlet cone respectively. Preferably, the embodiment of the application also discloses that the plug is a conical plug, and the conical plug is in threaded connection with the ejector rod. Preferably, the embodiment of the