Piercing and forming equipment for seamless steel pipes based on accurate positioning

Abstract

The utility model discloses a seamless steel tube perforation forming equipment based on accurate positioning relates to seamless steel tube processing technical field, solved the positioning stability and accuracy and are not good, it is difficult to form the uniform and stable constraint from all around to pipe blank, and the shaking of pipe blank can directly cause the eccentricity when perforating, influence product quality's problem. The seamless steel tube perforation forming equipment based on accurate positioning includes: bottom plate and fixed ring, the bottom plate adopts rectangular sheet structure, the bottom plate is provided with the fixed ring of circular ring structure above, and the outside of fixed ring is annular array and is provided with four groups of through -type rectangular through -slot structure, and the four groups of rectangular sliding groove of fixed ring outside all slide and set up a group of slider of rectangular block structure, the inside end of slider is fixed and is provided with the fixed frame of U shape board structure, the inside rotation of fixed frame is provided with the gyro wheel, effectively guaranteed the concentricity of pipe blank center and drill center, significantly improved the quality stability of product.

Description

Technical Field

[0001] This utility model belongs to the field of seamless steel pipe processing technology, and more specifically, it relates to a seamless steel pipe piercing and forming equipment based on precise positioning. Background Technology

[0002] In the production process of seamless steel pipes, the piercing forming process is the core link to transform solid billets into hollow tubes. The positioning accuracy of the billet during the piercing process directly determines the key quality indicators such as the uniformity of wall thickness and eccentricity of the subsequent tube. Currently, the two-roll skew rolling piercing mill is the mainstream piercing equipment, and its positioning of the billet mostly relies on traditional guide roller groups or simple centering mechanisms, which has exposed many problems in practical applications.

[0003] The current conveying devices of steel pipe piercing and forming equipment still have the following shortcomings: Poor positioning stability and accuracy mean that during piercing, the billet is subject to the rotational friction and axial thrust of the rolls, making it prone to radial offset or axial movement. Traditional centering mechanisms often clamp from one or both sides, making it difficult to form a uniform and stable constraint on the billet from all sides. The billet's swaying will directly cause eccentricity during piercing, which not only affects product quality but may also cause the billet to get stuck in the equipment, leading to equipment failure and reduced production efficiency. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a seamless steel pipe piercing and forming device based on precise positioning. This solves the problems mentioned in the background art, such as poor positioning stability and accuracy, difficulty in forming a uniform and stable constraint on the tube blank from all sides, and the tube blank's shaking causing eccentricity during piercing, which not only affects product quality.

[0005] The purpose and effectiveness of this utility model, based on a seamless steel pipe piercing and forming equipment with precise positioning, are achieved through the following specific technical means: The seamless steel pipe piercing and forming equipment based on precise positioning includes: a base plate and a fixing ring; the base plate adopts a rectangular plate structure; a ring-shaped fixing ring is set on the top of the base plate, and four sets of through rectangular slot structures are arranged in a ring array on the outer side of the fixing ring, and a ring-shaped groove structure is opened on the front side of the fixing ring; a set of rectangular block sliders are slidably arranged in each of the four sets of rectangular sliding grooves on the outer side of the fixing ring, and a threaded groove structure is opened on one side of the slider; a U-shaped plate structure fixing frame is fixedly set on the inner end of the slider; a roller is rotatably arranged on the inner side of the fixing frame.

[0006] Furthermore, four sets of cylindrical sliding rods are fixedly arranged in a rectangular array on the top of the base plate; a set of first cylinders is fixedly arranged on the top of both the left and right sides of the base plate.

[0007] Furthermore, a rectangular frame structure sliding bracket is slidably arranged between the four sets of sliding rods, and the sliding bracket is connected to the first cylinder in a transmission manner.

[0008] Furthermore, a second cylinder is rotatably connected to one side of the top of the sliding frame; a ring-shaped collar is fixedly installed at the top of the transmission end of the second cylinder; a set of rectangular rod support rods are arranged and fixedly installed on both the left and right sides of the top of the sliding frame, and a set of fixing rings is fixedly installed at the top between the two sets of support rods.

[0009] Furthermore, a control ring is rotatably disposed in the annular groove on the front side of the fixed ring, and a threaded groove structure that mates with the thread on the slider is provided on one side of the control ring; an L-shaped connecting rod is fixedly disposed on the outer side of each group of control rings, and the connecting rods are connected in series and fixedly connected, with a collar rotatably sleeved on the outer side of the connecting rod.

[0010] Compared with the prior art, the present invention has the following beneficial effects: To improve positioning accuracy and ensure product quality, this utility model uses four sets of rollers arranged in a ring array. With the cooperation of the control ring and the slider, the tube blank can be uniformly clamped from all sides, ensuring that the tube blank is stably positioned in the center of the fixed ring. This effectively guarantees the concentricity between the center of the tube blank and the center of the drill bit, greatly reducing problems such as tube eccentricity and uneven wall thickness caused by positioning deviation during the piercing process, and significantly improving the quality stability of the product.

[0011] Adaptable to multiple specifications, enhancing equipment flexibility, the structure of the sliding frame driven by the first cylinder to rise and fall vertically along the slide rod allows for flexible adjustment of the height of the fixing ring according to different diameter tube blanks, ensuring that the center of the fixing ring is always aligned with the center of the drill bit. This eliminates the need to replace the centering component, meeting the processing requirements of tube blanks of various diameters, reducing auxiliary time during specification switching, and improving the equipment's versatility and production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall axial view structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the overall front view structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the overall side view structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the overall disassembled structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the disassembled structure of the fixed ring, slider, and control ring of this utility model.

[0017] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Base plate; 101. Slide rod; 102. First cylinder; 103. Sliding frame; 104. Second cylinder; 105. Support rod; 106. Fixing ring; 107. Slider; 108. Fixing frame; 109. Roller; 110. Control ring; 111. Connecting rod; 112. Collar. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0019] Example 1: As shown in the attached document Figure 1 To be continued Figure 5 As shown: This utility model provides a seamless steel pipe piercing and forming device based on precise positioning, including: a base plate 1 and a fixing ring 106; the base plate 1 adopts a rectangular plate structure; a ring-shaped fixing ring 106 is provided on the top of the base plate 1, and four sets of through rectangular slot structures are provided on the outer side of the fixing ring 106 in a ring array, and a ring-shaped groove structure is provided on the front side of the fixing ring 106; a set of rectangular block sliders 107 are slidably arranged in each of the four sets of rectangular sliding grooves on the outer side of the fixing ring 106, and a threaded groove structure is provided on one side of the slider 107; a U-shaped plate structure fixing frame 108 is fixedly arranged on the inner end of the slider 107; a roller 109 is rotatably arranged on the inner side of the fixing frame 108.

[0020] The sliding frame 103 is rotatably connected to a second cylinder 104 on one side of its top; a ring 112 with an annular structure is fixedly installed at the top of the transmission end of the second cylinder 104; a set of rectangular rod support rods 105 are arranged and fixedly installed on both the left and right sides of the top of the sliding frame 103, and a set of fixing rings 106 are fixedly installed at the top between the two sets of support rods 105.

[0021] Among them, a control ring 110 is rotatably disposed in the annular groove on the front side of the fixed ring 106, and a threaded groove structure that engages with the thread on the slider 107 is provided on one side of the control ring 110, forming a helical transmission mechanism; an L-shaped connecting rod 111 is fixedly disposed on the outer side of each group of control rings 110, and the connecting rods 111 are connected in series; a collar 112 is rotatably sleeved on the outer side of the connecting rod 111, and the control ring 110 is rotated by the extension and retraction of the second cylinder 104.

[0022] The specific usage and function of this embodiment are as follows: The billet conveyor rollers are started to smoothly transport the steel billet to the center of the fixed ring 106. When the front end of the billet enters the inner side of the first set of fixed rings 106, the piston rod of the second cylinder 104 is activated to push the collar 112 to move. The collar 112 drives the connecting rod 111 to move, which in turn causes the control ring 110 to rotate in the annular groove on the front side of the fixed ring 106. Since the control ring 110 and the slider 107 form a helical transmission mechanism, the rotation of the control ring 110 drives the four sets of sliders 107 to move synchronously towards the center along the rectangular groove on the outer side of the fixed ring 106. The sliders 107 drive the fixed frame 108 and the rollers 109 to move until the four sets of rollers 109 are evenly in contact with the outer surface of the billet. The steel billet is positioned from all sides by the cooperation of four sets of rollers 109, ensuring that the billet is in the center of the fixing ring 106. This allows the center of the billet to be aligned with the center of the drill bit. After the billet is centered and clamped, the control system sends a start signal to the two-roll skew rolling mill. The rollers of the mill begin to rotate, simultaneously driving the billet to rotate and move forward. During the piercing process, the billet drives the rollers 109 to rotate synchronously. The rollers 109 provide stable radial constraint for the billet, preventing radial displacement under rolling force. On the other hand, the rotation of the rollers 109 reduces friction with the surface of the billet, avoiding scratches and other defects on the billet surface.

[0023] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 5 As shown: The base plate 1 has four sets of cylindrical sliding rods 101 fixedly arranged in a rectangular array on its top perimeter to provide guide support for the sliding frame 103; a set of first cylinders 102 are fixedly arranged on the top of both the left and right sides of the base plate 1.

[0024] Among them, a rectangular frame structure sliding frame 103 is slidably arranged between the four sets of sliding rods 101, and the sliding frame 103 is connected to the first cylinder 102 for transmission. The sliding frame 103 achieves vertical lifting and lowering along the sliding rods 101 through the extension and retraction of the first cylinder 102, so as to adapt to the piercing requirements of tube blanks of different diameter specifications.

[0025] The specific usage and function of this embodiment are as follows: In this invention, the base plate 1 is fixed to the preset foundation surface at the feed end of the two-roll skew rolling mill by expansion bolts, so that the axis of the fixing ring 106 coincides with the rolling center line of the mill, thus laying the foundation for precise positioning of the tube blank. The control system sends a command to the first cylinder 102, and the first cylinder 102 extends and retracts to drive the sliding frame 103 to rise along the sliding rod 101, so that the axis of the fixing ring 106 is aligned with the center height of the drill bit. The center position of the fixing ring 106 can be adjusted according to the steel tube blanks of different diameters to ensure that the center of the fixing ring 106 is always consistent with the center of the drill bit, thereby meeting the processing needs of steel tube blanks of different diameters.

Claims

1. A seamless steel pipe piercing and forming equipment based on precise positioning, characterized in that, include: The base plate (1) and the fixing ring (106) are provided. The base plate (1) adopts a rectangular plate structure. A ring-shaped fixing ring (106) is provided on the top of the base plate (1). The outer side of the fixing ring (106) is provided with four sets of through rectangular slot structures in a ring array. A ring-shaped groove structure is provided on the front side of the fixing ring (106). A set of rectangular block sliders (107) are slidably provided in the four sets of rectangular sliding grooves on the outer side of the fixing ring (106). A threaded groove structure is provided on one side of the slider (107). A U-shaped plate structure fixing frame (108) is fixedly provided on the inner side of the slider (107). A roller (109) is rotatably provided on the inner side of the fixing frame (108).

2. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 1, characterized in that: The bottom plate (1) has four sets of cylindrical sliding rods (101) fixedly arranged in a rectangular array around its top and sides.

3. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 1, characterized in that: A set of first cylinders (102) are fixedly installed on the top of both the left and right sides of the base plate (1).

4. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 2, characterized in that: A rectangular frame structure sliding bracket (103) is slidably arranged between the four sets of sliding rods (101), and the sliding bracket (103) is connected to the first cylinder (102) in a transmission connection.

5. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 4, characterized in that: A second cylinder (104) is rotatably connected to one side of the top of the sliding frame (103); a ring (112) with a circular structure is fixedly provided at the top of the transmission end of the second cylinder (104).

6. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 4, characterized in that: The sliding frame (103) has a set of rectangular rod structure support rods (105) arranged and fixed on both the left and right sides of the top, and a set of fixing rings (106) is fixedly installed at the top between the two sets of support rods (105).

7. The seamless steel pipe piercing and forming equipment based on precise positioning as described in claim 1, characterized in that: A control ring (110) is rotatably disposed in the annular groove on the front side of the fixed ring (106), and a threaded groove structure that engages with the threaded part of the slider (107) is provided on one side of the control ring (110); an L-shaped rod (111) is fixedly disposed on the outer side of each group of control rings (110), and the connecting rods (111) are connected in series and fixedly connected, and a collar (112) is rotatably sleeved on the outer side of the connecting rod (111).

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