A solid tube blank rapid piercing and stabilizing plug device

Abstract

The utility model relates to stable top head technical field, concretely is a kind of solid pipe blank rapid piercing stable top head equipment, including compression resistance layer, the lower end of the compression resistance layer is provided with wear layer, the lower end of the wear layer is provided with shaping layer, the top end of the compression resistance layer is provided with top head, the utility model can be connected with connecting shaft stem by the third threaded hole of shaping layer lower end, cooperate the design of fixed block and threaded ring, form adjustable connecting mechanism. By rotating threaded ring, the relative position of fixed block and connecting shaft stem can be accurately controlled, the axial length adjustment of top head equipment is realized, so that the equipment can quickly adapt to the pipe blank piercing demand of different pipe diameter and wall thickness, without replacing the whole device, greatly shorten the time of changing type, improve production efficiency. At the same time, the design of the positive and negative rotation direction of fixed block and connecting shaft stem ensures that the connection is more closely during high-speed rotating piercing process, prevents loosening, further improves the stability and reliability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of stabilizing mandrel technology, specifically a device for rapidly piercing and stabilizing mandrels for solid tube blanks. Background Technology

[0002] In modern industrial manufacturing, piercing solid tube blanks is a crucial process for producing seamless steel pipes, machine parts, and other products. Traditional piercing equipment often suffers from insufficient structural strength when dealing with high-strength alloy tube blanks, leading to accelerated mandrel wear, decreased piercing accuracy, and even equipment failure, thus impacting production efficiency and product quality. Furthermore, processing tube blanks of different diameters and wall thicknesses requires frequent changes of suitable mandrel equipment, which is time-consuming, labor-intensive, and increases production costs.

[0003] Limitations of Single-Layer Mandrel Structures: Traditional mandrels often use a single material, making it difficult to simultaneously meet the requirements of pressure resistance, wear resistance, and shaping. Under high-temperature and high-pressure piercing conditions, mandrels are prone to deformation and wear, resulting in poor inner wall quality of the pipe and requiring frequent mandrel replacements, increasing production downtime and costs. Inconvenient Connection Mechanism Adjustment: Conventional equipment lacks flexible adjustment capabilities in its connection mechanisms, making it difficult to quickly adapt to the processing needs of different sized tube blanks. Complex Changeover Processes: Multiple components need to be disassembled, leading to low production efficiency. Inappropriate Curved Surface Design: Improperly designed curved surface angles in some mandrels result in excessive resistance during piercing, easily causing tube blank cracking, while also increasing equipment energy consumption and wear. Therefore, we propose a solid tube blank rapid piercing stabilizing mandrel device to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a device for rapid piercing and stabilizing a mandrel on a solid tube blank, so as to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is: a fast piercing and stabilizing mandrel device for solid tube blanks, including a pressure-resistant layer, a wear-resistant layer at the lower end of the pressure-resistant layer, a shaping layer at the lower end of the wear-resistant layer, a mandrel at the top end of the pressure-resistant layer, four first mounting holes on the surface of the pressure-resistant layer, four first threaded holes and two threaded holes at both ends of the wear-resistant layer, and four second mounting holes on the surface of the shaping layer.

[0006] Preferably, a first screw is threaded into the first mounting hole and the first threaded hole, and the pressure-resistant layer and the wear-resistant layer are tightly bonded together. A second screw is threaded into the second mounting hole and the second threaded hole, and the wear-resistant layer and the shaping layer are tightly bonded together.

[0007] Preferably, the lower end of the shaping layer is provided with a third threaded hole, a connecting rod is internally threaded into the third threaded hole, a threaded ring is slidably connected to the surface of the connecting rod, and a fixing block is rotatably connected to the lower end of the shaping layer.

[0008] Preferably, the fixing block is threadedly connected to the threaded ring, the fixing block and the threaded ring are matched, and the fixing block and the connecting rod rotate in opposite directions.

[0009] Preferably, the top surface is curved, and the curvature angle is thirty degrees.

[0010] Preferably, the pressure-resistant layer is made of cermet, the wear-resistant layer is made of high-temperature alloy, and the shaping layer is made of cemented carbide.

[0011] This utility model provides an improved device for rapid piercing and stabilizing a mandrel on a solid tube blank, which has the following improvements and advantages compared with the prior art: Firstly, this utility model employs a three-layer composite structure design consisting of a pressure-resistant layer, a wear-resistant layer, and a shaping layer, with a tight connection achieved through a first screw and a second screw. The pressure-resistant layer, made of metal-ceramic material, effectively disperses high-pressure stress during the piercing process, preventing damage to the equipment due to excessive localized stress. The high-temperature alloy material of the wear-resistant layer maintains excellent wear resistance under high-temperature friction environments, extending the service life of the equipment. The hard alloy material of the shaping layer ensures that the mandrel maintains a precise shape during piercing, improving the smoothness of the inner wall of the pipe. This synergistic effect of the multi-layer structure not only enhances the overall strength and stability of the equipment but also significantly improves the piercing quality and reduces the generation of defects on the inner wall of the pipe.

[0012] Secondly, this invention utilizes a third threaded hole at the lower end of the molding layer to connect with the connecting rod via a threaded connection. Combined with the design of a threaded ring and a fixing block, this forms an adjustable connection mechanism. By rotating the threaded ring, the relative position of the fixing block and the connecting rod can be precisely controlled, enabling axial length adjustment of the mandrel. This allows the equipment to quickly adapt to the piercing requirements of tube blanks with different diameters and wall thicknesses without requiring replacement of the entire device, significantly shortening changeover time and improving production efficiency. Furthermore, the reverse rotation design of the fixing block and the connecting rod ensures a tighter connection during high-speed rotation piercing, preventing loosening and further enhancing the stability and reliability of the equipment. Attached Figure Description

[0013] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2 This is a side view of the three-dimensional structure of this utility model; Figure 3 This is a side-sectional three-dimensional structural diagram of the present invention; Figure 4 This is a schematic diagram of the third threaded hole structure of this utility model; Explanation of reference numerals in the attached figures: 1. Compression-resistant layer; 2. Wear-resistant layer; 3. Shaping layer; 4. Top head; 5. First mounting hole; 6. First threaded hole; 7. First screw; 8. Second mounting hole; 9. Second threaded hole; 10. Second screw; 11. Third threaded hole; 12. Connecting shaft; 13. Fixing block; 14. Threaded ring. Detailed Implementation

[0014] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0015] This utility model provides an improved device for rapid piercing and stabilizing a mandrel on a solid tube blank. The technical solution of this utility model is as follows: like Figure 1 - Figure 4 As shown, a rapid piercing and stabilizing mandrel device for solid tube blanks includes a pressure-resistant layer 1, a wear-resistant layer 2 at the lower end of the pressure-resistant layer 1, a shaping layer 3 at the lower end of the wear-resistant layer 2, a mandrel 4 at the top of the pressure-resistant layer 1, four first mounting holes 5 on the surface of the pressure-resistant layer 1, four first threaded holes 6 and two threaded holes 9 at both ends of the wear-resistant layer 2, and four second mounting holes 8 on the surface of the shaping layer 3.

[0016] Furthermore, the first mounting hole 5 and the first threaded hole 6 are internally threaded with a first screw 7, and the pressure-resistant layer 1 and the wear-resistant layer 2 are tightly bonded together. The second mounting hole 8 and the second threaded hole 9 are internally threaded with a second screw 10, and the wear-resistant layer 2 and the shaping layer 3 are tightly bonded together. The multi-layer structure is detachably connected by the first screw 7 and the second screw 10, so that the equipment can flexibly replace the damaged layer or adjust the combination between layers under different working conditions.

[0017] Furthermore, a third threaded hole 11 is provided at the lower end of the shaping layer 3. A connecting rod 12 is internally threaded in the third threaded hole 11. A threaded ring 14 is slidably connected to the surface of the connecting rod 12. A fixing block 13 is rotatably connected to the lower end of the shaping layer 3. The adjustable connection between the connecting rod 12 and the shaping layer 3 is achieved through threaded engagement, combined with the sliding and rotating structure of the threaded ring 14 and the fixing block 13.

[0018] Furthermore, the fixing block 13 is threadedly connected to the threaded ring 14, and the fixing block 13 and the threaded ring 14 are matched. The fixing block 13 and the connecting rod 12 rotate in opposite directions. The reverse rotation design of the fixing block 13 and the connecting rod 12 generates a self-locking effect when the equipment is running at high speed, preventing the connection from loosening due to vibration. The threaded engagement of the threaded ring 14 provides a reliable preload, ensuring that the connection mechanism remains stable during high-pressure piercing, thereby improving piercing accuracy and equipment reliability, and reducing the frequency of failures and maintenance caused by loosening.

[0019] Furthermore, the surface of the mandrel 4 is curved with a curvature angle of 30 degrees. This 30-degree curvature angle design creates the optimal entry angle during the piercing process, enabling the mandrel 4 to gradually penetrate the tube blank material and reducing the initial piercing resistance.

[0020] Furthermore, the pressure-resistant layer 1 is made of cermet, the wear-resistant layer 2 is made of high-temperature alloy, and the shaping layer 3 is made of cemented carbide. The cermet-resistant layer 1 has both high strength and high temperature resistance, and can withstand the huge pressure during the piercing process; the high-temperature alloy wear-resistant layer 2 maintains excellent wear resistance in high-temperature friction environment; and the cemented carbide shaping layer 3 ensures that the mandrel maintains its precise shape under high pressure.

[0021] Working Principle: When the mandrel 4 contacts the tube blank, the metal-ceramic pressure-resistant layer 1 initially bears immense pressure. Its high compressive strength evenly distributes concentrated stress throughout the entire layer, preventing excessive local stress from damaging the equipment. During piercing, the high-temperature alloy wear-resistant layer 2 rubs violently against the inner wall of the tube blank, while the hard alloy shaping layer 3 maintains a stable shape under high pressure. Its precise geometric design guides the mandrel 4 to penetrate the tube blank along a predetermined path, ensuring the smoothness and dimensional accuracy of the tube's inner wall. The operator rotates the threaded ring 14, utilizing its threaded engagement with the fixed block 13 to drive the fixed block 13 to move axially along the connecting rod 12. Since the fixed block 13 rotates in the opposite direction to the connecting rod 12, this design generates a self-locking effect during adjustment, ensuring reliable position locking. The insertion depth of the connecting rod 12 in the third threaded hole 11 can be quickly adjusted. Combined with the locking function of the threaded ring 14, equipment parameter adjustments can be completed in a short time without disassembling or replacing parts.

[0022] The foregoing description enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rapid piercing and stabilizing mandrel device for solid tube blanks, comprising a pressure-resistant layer (1), characterized in that: The lower end of the pressure-resistant layer (1) is provided with a wear-resistant layer (2), the lower end of the wear-resistant layer (2) is provided with a shaping layer (3), the top end of the pressure-resistant layer (1) is provided with a top head (4), the surface of the pressure-resistant layer (1) is provided with four first mounting holes (5), both ends of the wear-resistant layer (2) are provided with four first threaded holes (6) and two threaded holes (9), and the surface of the shaping layer (3) is provided with four second mounting holes (8).

2. The device for rapid piercing and stabilizing a solid tube blank according to claim 1, characterized in that: The first mounting hole (5) and the first threaded hole (6) are internally threaded with a first screw (7), the pressure-resistant layer (1) and the wear-resistant layer (2) are tightly bonded together, the second mounting hole (8) and the second threaded hole (9) are internally threaded with a second screw (10), and the wear-resistant layer (2) and the shaping layer (3) are tightly bonded together.

3. The solid tube blank rapid piercing and stabilizing mandrel device according to claim 1, characterized in that: The lower end of the shaping layer (3) is provided with a third threaded hole (11), and a connecting rod (12) is internally threaded in the third threaded hole (11). A threaded ring (14) is slidably connected to the surface of the connecting rod (12), and a fixing block (13) is rotatably connected to the lower end of the shaping layer (3).

4. The solid tube blank rapid piercing and stabilizing mandrel device according to claim 3, characterized in that: The fixing block (13) is threadedly connected to the threaded ring (14), the fixing block (13) and the threaded ring (14) are matched, and the fixing block (13) and the connecting rod (12) rotate in opposite directions.

5. The device for rapid piercing and stabilizing a solid tube blank according to claim 1, characterized in that: The top (4) surface is curved, and the angle of the curved surface is thirty degrees.

6. The device for rapid piercing and stabilizing a solid tube blank according to claim 1, characterized in that: The pressure-resistant layer (1) is made of metal ceramic, the wear-resistant layer (2) is made of high-temperature alloy, and the shaping layer (3) is made of hard alloy.

Images