Steel pipe cold-drawing machine capable of reducing bending deformation

Abstract

The utility model discloses a steel pipe cold-drawing machine capable of reducing bending deformation, which comprises a main machine seat, a V-shaped groove arranged on one side of the upper end of the main machine seat, a propelling mechanism arranged on one side of the V-shaped groove, a cold-drawing trolley arranged on the other side of the upper end of the main machine seat, a hydraulic oil cylinder arranged on one side of the cold-drawing trolley, and a transmission cavity, and the transmission cavity is formed in the upper side of the middle position in the main machine base, a double-thread transmission rod is rotationally arranged in the transmission cavity, and the two sides of the exterior of the double-thread transmission rod are in threaded connection with moving blocks. According to the steel pipe cold-drawing machine capable of reducing bending deformation, the die can be stably clamped in the center position, the problem that center lines are not coincident due to installation deviation is effectively avoided, the center line of the die can be accurately aligned with the center lines of the steel pipe and the core rod, it is guaranteed that tensile force borne by the steel pipe in the cold-drawing process is evenly distributed, and the production efficiency is improved. And the bending deformation phenomenon caused by uneven stress is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe cold drawing machines, and particularly relates to a steel pipe cold drawing machine for reducing bending deformation. Background Technique

[0002] As a key device in the modern metal processing field, the steel pipe cold drawing machine plays a crucial role in the manufacturing process of precision steel pipes. This machine is specifically designed to further refine the rough pipes obtained after hot rolling or extrusion at room temperature. By forcing the rough pipes through a series of carefully designed dies, precise control over their shape, size, and mechanical properties can be achieved. During the cold drawing process, high pressure is applied to the steel pipe through the dies, causing it to undergo plastic deformation. This not only effectively reduces the diameter of the steel pipe and increases its length but also significantly improves its hardness, strength, wear resistance, and surface finish, meeting the requirements for high-precision and high-performance pipe materials. This process is particularly suitable for the production of small-diameter, thin-walled, and high-precision steel pipes and is widely used in many fields such as automobile manufacturing, petrochemical industry, aerospace, and precision machinery.

[0003] A Chinese patent with the publication number CN209094191U discloses a steel pipe cold drawing machine, which includes a main machine base, a cold drawing machine base, and a drawing die machine base. The rear end face of the main machine base is provided with a feeding machine base. The center of the front end face of the feeding machine base is provided with a pushing mechanism. The rear end face of the pushing mechanism is fixedly installed on the front end face of the feeding machine base, and the front end face of the pushing mechanism is in contact with the rear end face of the steel pipe. The steel pipe is placed at the notch of the V-shaped groove. The lower end of the V-shaped groove is fixed on the working plane of the feeding machine base. The lower end of the drawing die machine base is provided with an I-shaped notch, and a through groove is provided on the lower end face of the I-shaped notch.

[0004] Although the above solution realizes the installation and disassembly of the die, when disassembling and assembling the die of this steel pipe cold drawing machine, the die is only fixed to the drawing die base by bolts, making it difficult to accurately ensure that the center line of the die is completely collinear with the steel pipe and the mandrel. This easily leads to uneven stress on the steel pipe during the cold drawing process, increasing the risk of bending deformation. Therefore, it does not meet the existing requirements. For this reason, we propose a steel pipe cold drawing machine for reducing bending deformation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a steel pipe cold drawing machine for reducing bending deformation, so as to solve the problem that when disassembling and assembling the die of the steel pipe cold drawing machine, it is difficult to ensure that the center line of the die is completely collinear with the steel pipe and the mandrel, resulting in uneven stress on the steel pipe during the cold drawing process and increasing the risk of bending deformation as mentioned in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solution: A steel pipe cold drawing machine for reducing bending deformation, including a main machine base, on one side of the upper end of the main machine base, there is a V-shaped groove, on one side of the V-shaped groove, there is a propulsion mechanism, on the other side of the upper end of the main machine base, a cold drawing trolley is installed, and on one side of the cold drawing trolley, there is a hydraulic cylinder;

[0007] It further includes a transmission cavity, which is opened on the upper side at the middle position inside the main machine base. A double-threaded transmission rod is rotatably arranged inside the transmission cavity. On both sides of the outside of the double-threaded transmission rod, there are moving blocks threadedly connected. One end of the moving block extends to the outside of the transmission cavity. One end of the double-threaded transmission rod is provided with a rotating shaft, and the rotating shaft is rotatably connected to the transmission cavity;

[0008] It further includes a storage groove, which is opened on one side inside the main machine base. A weighing sensor is installed at the middle position of the lower end inside the storage groove. Above the weighing sensor, there is a storage box, and the storage box is in contact with the weighing sensor.

[0009] Preferably, a transmission worm gear is arranged on the outer wall of the rotating shaft. Below the transmission worm gear, there is a transmission worm. The transmission worm is rotatably connected to the transmission cavity, and there is a worm drive between the transmission worm and the transmission worm gear.

[0010] Preferably, a motor is arranged at the rear side of the lower end inside the transmission cavity, and the output end of the motor is in transmission connection with the transmission worm through a coupling.

[0011] Preferably, guide rods are welded on the front and rear sides of the upper side inside the transmission cavity. The guide rods all penetrate through the moving blocks, and the guide rods are all in sliding fit with the moving blocks.

[0012] Preferably, a PLC controller is installed on one side of the front end of the main machine base, and the input end of the PLC controller is electrically connected to the output end of the weighing sensor.

[0013] Preferably, an audible and visual alarm is installed on the upper side of one side of the main machine base, and the output end of the audible and visual alarm is electrically connected to the input end of the PLC controller.

[0014] Preferably, clamping blocks are welded on the inner sides of the ends of the moving blocks located outside the transmission cavity. A mold is arranged between the clamping blocks, and the mold is adapted to the clamping blocks.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The utility model is provided with a transmission cavity at the middle position inside the main seat. When disassembling, installing and replacing the mold, the mold is placed between two clamping blocks. By rotating the double-threaded transmission rod, two moving blocks can be driven to move towards each other. The moving blocks will drive the clamping blocks to move synchronously, so that the mold in the middle can be clamped and fixed. Since the moving paths of the two moving blocks are equal and synchronous, the balanced distribution of the clamping force is ensured, so that the mold can be firmly clamped at the central position, effectively avoiding the problem of non-coincidence of the center lines caused by installation deviation. The center line of the mold can be accurately aligned with the center lines of the steel pipe and the core rod, ensuring that the tensile force received by the steel pipe during the cold drawing process is evenly distributed, and avoiding the bending deformation phenomenon caused by uneven force.

[0017] 2. The utility model is provided with a transmission worm at the rear side of the lower side inside the transmission cavity. When the motor is started, the transmission worm can rotate, and is used for worm transmission between the transmission worm and the transmission worm wheel, so the transmission worm wheel will be driven to drive the double-threaded transmission rod to rotate. Since the worm transmission has self-locking property, when the transmission worm stops rotating, the double-threaded transmission rod will also maintain its current position and will not move accidentally due to external vibration or slight collision, thus ensuring the stability and safety of the mold clamping, effectively avoiding production accidents and quality problems caused by mold loosening, and reducing the frequent inspection and adjustment of the clamping state of the mold by the operator.

[0018] 3. The utility model is provided with a weighing sensor installed at the lower end inside the storage groove, and a storage box is arranged at the upper end of the weighing sensor. When the steel pipe is completed with cold drawing, it will fall into the storage box, and the weighing sensor will weigh the weight of the storage box and transmit the detected data to the PLC controller. The operator pre-sets a standard value in the PLC controller in advance. When the weight of the collected steel pipe reaches the preset standard value, the PLC controller will start the sound and light alarm, so as to attract the nearby operator to carry out the discharging of the steel pipe. The operator does not need to observe the collection situation of the steel pipe frequently, avoiding the problems of over-collection or under-collection caused by human negligence or fatigue, and ensuring the continuity and stability of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 is a rear view schematic diagram of the internal structure of the utility model;

[0021] Figure 3 is a side view schematic diagram of the internal structure of the utility model;

[0022] Figure 4 is of the utility model Figure 2 partial enlarged view of area A in.

[0023] In the figure: 1, main frame; 2, propulsion mechanism; 3, V-shaped groove; 4, hydraulic cylinder; 5, transmission cavity; 6, double-threaded transmission rod; 7, guide rod; 8, moving block; 9, clamping block; 10, rotating shaft; 11, transmission worm gear; 12, transmission worm; 13, motor; 14, PLC controller; 15, storage groove; 16, storage box; 17, weighing sensor; 18, sound and light alarm; 19, cold drawing trolley; 20, die. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-4 , the present invention provides a technical solution: a steel pipe cold drawing machine for reducing bending deformation, including a main frame 1, a V-shaped groove 3 is arranged on one side of the upper end of the main frame 1, a propulsion mechanism 2 is arranged on one side of the V-shaped groove 3, a cold drawing trolley 19 is installed on the other side of the upper end of the main frame 1, and a hydraulic cylinder 4 is arranged on one side of the cold drawing trolley 19;

[0026] It further includes a transmission cavity 5, which is opened on the upper side at the middle position inside the main frame 1. A double-threaded transmission rod 6 is rotatably arranged inside the transmission cavity 5. Both sides of the outside of the double-threaded transmission rod 6 are threadedly connected with moving blocks 8. One end of the moving block 8 extends to the outside of the transmission cavity 5. One end of the double-threaded transmission rod 6 is provided with a rotating shaft 10, and the rotating shaft 10 is rotatably connected with the transmission cavity 5;

[0027] It further includes a storage groove 15, which is opened on one side inside the main frame 1. A weighing sensor 17 is installed at the middle position of the lower end inside the storage groove 15. A storage box 16 is arranged above the weighing sensor 17, and the storage box 16 is in contact with the weighing sensor 17.

[0028] During use, place the steel pipe to be processed in the V-shaped groove 3 of the main frame 1, select a matching die 20 and place it between the two clamping blocks 9. Start the motor 13, drive the transmission worm 12 to rotate through the coupling. The worm drive drives the transmission worm wheel 11 and the rotating shaft 10 to rotate synchronously, and then rotates the double-threaded transmission rod 6. The double-threaded transmission rod 6 drives the two moving blocks 8 to slide along the guide rod 7, moving towards each other to clamp the die 20. This process can ensure that the center line of the die is aligned with the steel pipe and the mandrel, and the force is evenly distributed. Through the cooperation of the propulsion mechanism 2, the hydraulic cylinder 4 and the cold drawing trolley 19, cold drawing is completed. After completion, the steel pipe falls into the storage box 16. The weighing sensor 17 weighs in real time and transmits the data to the PLC controller 14. When the preset weight is reached, the PLC activates the sound and light alarm 18 to notify the operator for timely processing.

[0029] Please refer to Figure 3 and Figure 4 , on the outer wall of the rotating shaft 10 is provided with a transmission worm wheel 11. Below the transmission worm wheel 11 is provided with a transmission worm 12. The transmission worm 12 is rotationally connected to the transmission cavity 5, and there is a worm drive between the transmission worm 12 and the transmission worm wheel 11. The worm drive can not only achieve the synchronous rotation of the transmission worm wheel 11, but also utilize its self-locking characteristic to prevent the transmission system from accidentally reversing or loosening when the motor 13 stops working, ensuring the stability and safety of the clamping of the die 20;

[0030] Please refer to Figure 4 , at the rear side of the lower end inside the transmission cavity 5 is provided with a motor 13, and the output end of the motor 13 is in transmission connection with the transmission worm 12 through a coupling. The motor 13 serves as the power source and directly drives the transmission worm 12 through the coupling, simplifying the transmission chain, improving the transmission efficiency, and being easy to maintain and replace;

[0031] Please refer to Figure 3 and Figure 4 , on the front and rear sides of the upper side inside the transmission cavity 5 are both welded with guide rods 7. The guide rods 7 all penetrate through the moving blocks 8, and the guide rods 7 are all in sliding fit with the moving blocks 8. The guide rods 7 provide a stable sliding track for the moving blocks 8, ensuring that they will not deviate or shake during the transmission process, improving the transmission accuracy and stability;

[0032] Please refer to Figure 1 and Figure 2, a PLC controller 14 is installed on one side of the front end of the main frame 1, and the input end of the PLC controller 14 is electrically connected to the output end of the weighing sensor 17. The PLC controller 14 is an OHR-PR10 simple PLC Chinese all-in-one machine. As the core of the control system, it can receive the data transmitted by the weighing sensor 17 in real time and make judgments and processing according to the preset logic, realizing automatic control and intelligent management. The model of the weighing sensor 17 is NTJH-4D. This sensor is designed with excellent stability and anti-interference ability and can maintain the accuracy and reliability of the measurement results in various complex environments;

[0033] Please refer to Figure 1 and Figure 2 , an audible and visual alarm 18 is installed on the upper side of one side of the main frame 1, and the output end of the audible and visual alarm 18 is electrically connected to the input end of the PLC controller 14. The audible and visual alarm 18 is a BBJ-ZR Taichuang explosion-proof audible and visual alarm. When the PLC controller 14 detects that the preset conditions are met, it can quickly start the audible and visual alarm 18, attracting the attention of the operator through the audible and visual signals, improving production efficiency and safety;

[0034] Please refer to Figure 1 and Figure 3 , clamping blocks 9 are welded on the inner sides of the outer ends of the moving block 8 located outside the transmission cavity 5. A mold 20 is arranged between the clamping blocks 9, and the mold 20 is adapted to the clamping blocks 9. The clamping blocks 9 can accurately and firmly clamp the mold 20, ensuring that the relative position between the mold and the steel pipe remains unchanged during the cold drawing process, improving the processing accuracy and product quality.

[0035] Working principle: When in use, place the steel pipe to be processed at the notch of the V-shaped groove 3, replace the mold 20 that matches the steel pipe, place the mold 20 between the two clamping blocks 9, start the motor 13, and the motor 13 will drive the driving worm 12 to rotate through the coupling. There is a worm drive between the driving worm 12 and the driving worm gear 11, so it will drive the driving worm gear 11 to rotate synchronously. The driving worm gear 11 will drive the rotating shaft 10 to rotate, and the rotating shaft 10 will drive the double-threaded transmission rod 6 to rotate synchronously. The double-threaded transmission rod 6 will drive the two moving blocks 8 to rotate synchronously. Since the moving blocks 8 are all slidably matched with the guide rod 7, the moving blocks 8 will all be axially limited. The rotation of the two moving blocks 8 will be converted into opposite or approaching horizontal linear movements. When the two moving blocks 8 move towards each other, they will drive the clamping blocks 9 to move synchronously, so that the mold 20 can be clamped and fixed in the middle position. Since the moving paths of the two moving blocks 8 are equal and synchronous, it ensures the balanced distribution of the clamping force, effectively avoiding the problem of non-coincidence of the center lines caused by installation deviation. The center line of the mold 20 can be accurately aligned with the center lines of the steel pipe and the mandrel, ensuring that the tensile force received by the steel pipe during the cold drawing process is evenly distributed. And because the worm drive between the driving worm 12 and the driving worm gear 11 has self-locking property, when the driving worm 12 stops rotating, the double-threaded transmission rod 6 will also maintain its current position and will not move accidentally due to external vibration or slight collision, thus ensuring the stability and safety of the clamping of the mold 20. Subsequently, the steel pipe is cold drawn through the cooperation of the propulsion mechanism 2, the hydraulic cylinder 4, and the cold drawing trolley 19 (this is the prior art in this field and will not be described in detail). The steel pipe that has completed the cold drawing process will fall into the interior of the storage box 16. The weighing sensor 17 will weigh the storage box 16, and at the same time, it will send the weighing data to the PLC controller 14 through an electrical signal. The operator can preset the standard value in advance. When the weight of the collected steel pipe reaches the preset standard value, the PLC controller 14 will start the sound and light alarm 18, and the sound and light alarm 18 will give a sound and light alarm, thus attracting the nearby operator to come and check, so that the operator does not need to observe the collection situation of the steel pipe frequently, and it has good practicability.

[0036] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A steel pipe cold drawing machine for reducing bending deformation, comprising a main frame (1), a V-shaped groove (3) is provided on one side of the upper end of the main frame (1), a propulsion mechanism (2) is provided on one side of the V-shaped groove (3), a cold drawing trolley (19) is installed on the other side of the upper end of the main frame (1), a hydraulic cylinder (4) is provided on one side of the cold drawing trolley (19), and the characteristics are: It also comprises a transmission chamber (5) which is opened on the upper side of the middle position inside the main base (1); a double-threaded transmission rod (6) is rotatably arranged inside the transmission chamber (5); both sides of the outside of the double-threaded transmission rod (6) are threadedly connected with moving blocks (8); one end of the moving block (8) extends to the outside of the transmission chamber (5); a rotating shaft (10) is arranged at one end of the double-threaded transmission rod (6), and the rotating shaft (10) is rotatably connected to the transmission chamber (5); It also includes a storage groove (15) which is opened on one side of the main base (1); a weighing sensor (17) is installed at the middle position of the lower end of the storage groove (15); a storage box (16) is arranged above the weighing sensor (17), and the storage box (16) is in close contact with the weighing sensor (17).

2. A steel tube cold drawing machine for reducing bending deformation according to claim 1, characterized in that: A transmission worm wheel (11) is disposed on the outer wall of the rotating shaft (10), a transmission worm (12) is disposed below the transmission worm wheel (11), the transmission worm (12) is rotationally connected to the transmission chamber (5), and worm transmission is performed between the transmission worm (12) and the transmission worm wheel (11).

3. A steel tube cold drawing machine for reducing bending deformation according to claim 2, characterized in that: A motor (13) is arranged at the rear side of the lower end of the transmission chamber (5), and the output end of the motor (13) is connected to the transmission worm (12) via a coupling.

4. A steel tube cold drawing machine for reducing bending deformation according to claim 1, characterized in that: Guide rods (7) are welded to the front and rear sides of the upper inner side of the transmission cavity (5), and the guide rods (7) penetrate the moving blocks (8), and the guide rods (7) are slidably matched with the moving blocks (8).

5. The steel tube cold drawing machine for reducing bending deformation according to claim 1, characterized in that: A PLC controller (14) is installed on one side of the front end of the mainframe (1), and the input end of the PLC controller (14) is electrically connected to the output end of the weighing sensor (17).

6. A steel tube cold drawing machine for reducing bending deformation according to claim 5, characterized in that: An audible and visual alarm (18) is installed on the upper side of one side of the main frame (1), and the output end of the audible and visual alarm (18) is electrically connected to the input end of the PLC controller (14).

7. A steel tube cold drawing machine for reducing bending deformation according to claim 1, characterized in that: A clamping block (9) is welded to the inner side of one end of the moving block (8) located outside the transmission cavity (5), a mold (20) is arranged between the clamping blocks (9), and the mold (20) is adapted to the clamping blocks (9).

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