A hot forming process for a uniform cross-section boron steel pipe

Abstract

The invention belongs to the field of heat treatment plastic forming and heat treatment technology, specifically, it is a hot forming process of a boron steel pipe with equal cross-section, and the process comprises the following steps: S1: cutting a raw boron steel pipe into shorter boron steel pipe sections which are convenient for processing; S2: processing the boron steel pipe sections obtained in step S1 into finished products using hot forming equipment; in the process, the hot forming equipment can adapt to boron steel pipes with different diameters, and adjust the position of a heating coil to prevent the boron steel pipe from hitting the heating coil; at the same time, the heating is quickly completed by the heating coil; by arranging a cylinder 1, a motor 2, a saw wire, a cylinder 2 and a positioning baffle in the hot forming equipment, it is ensured that during the processing, the hot forming equipment can separate the processed workpiece from the boron steel pipe section, which is convenient for subsequent processing; the hot forming equipment can enable the boron steel pipe to be quickly cooled during the forming process, and can quickly cool down after the forming is completed, so as to avoid potential safety hazards.

Description

Technical Field

[0001] The invention belongs to the field of heat treatment plastic forming and heat treatment technology, and specifically relates to a hot forming process for a uniform cross-section boron steel pipe. Background Art

[0002] As a series of hot-formed steel pipes, the production process of boron steel pipes is divided into two stages: forming and quenching and cooling. In the forming stage, it needs to be formed by die stamping at high temperature; in the quenching and cooling stage, it is necessary to control a certain cooling rate to achieve the transformation from austenite microstructure to martensite microstructure, thereby obtaining extremely high strength and hardness. Depending on the type of boron steel, its strength can reach 500-2000MPa.

[0003] At present, the most common cooling method for mold quenching is to arrange cooling water channels inside the mold. That is, the high-temperature boron steel workpiece enters the pressure-holding cooling stage after being formed by mold stamping. The heat is first transferred to the mold steel, and the mold steel then transfers the heat to the cooling water channels arranged therein, thereby cooling the boron steel workpiece. The cooling efficiency of the workpiece in this way not only depends on the arrangement of the cooling water channels, but is also limited by the heat transfer efficiency of the mold steel. It is a hot forming process in which the workpiece is indirectly cooled by the coolant.

[0004] At the same time, in the existing process, when transferring the workpiece from the heating furnace to the press, the robot arm needs a certain amount of time to grab and put down the workpiece. During this process, the workpiece is exposed to the air during this period, the temperature drops quickly, and it is easy to oxidize. Therefore, it is necessary to ensure that the steel plate is transferred to the mold as quickly as possible. On the one hand, it is to prevent the steel plate from oxidizing at high temperature, and on the other hand, it is to ensure that the steel plate is still at a high temperature during forming to have good plasticity. The existing workpiece transfer method is that after heating is completed, the workpiece is sent out of the heating furnace by the conveyor roller, and then clamped to the stamping die by the robot arm. During the transfer process, the workpiece is easy to oxidize and the temperature drops.

[0005] For example, in the Chinese patent with application number CN201410738528.9, during the quenching process, low-medium pressure cooling water is directly introduced into the pipe to obtain a uniform martensitic structure with more uniform mechanical properties. However, this solution directly introduces low-temperature cooling water, which may cause the workpiece to cool too quickly and cause a certain degree of damage to the workpiece structure. At the same time, this solution does not explain how to heat and transfer the workpiece to prevent oxidation and temperature reduction of the workpiece during the transfer process. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention proposes a hot forming process for a uniform cross-section boron steel pipe.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a hot forming process of a uniform cross-section boron steel pipe according to the present invention comprises the following steps:

[0008] S1: Cutting the raw boron steel pipe into shorter boron steel pipe sections for easy processing;

[0009] S2: Processing the boron steel pipe section obtained in step S1 into a finished product using a hot forming device;

[0010] Among them, the hot forming equipment used in this process includes a machine body, an adjustable roller, a heating coil, an upper mold, a lower mold and a guide roller; the interior of the machine body is hollow; the machine body includes baffle 1, baffle 2, baffle 3, baffle 4, baffle 5, and a cooling water outlet; baffles 1 to 5 are installed in the machine body from right to left in sequence; baffles 1 to 5 are each provided with rectangular through holes of equal size; the rectangular through holes are located at the same height in the machine body; baffles 1 and baffle 5 are respectively installed at both ends of the machine body; the cooling water outlet is installed on the side of the machine body; the cooling water outlet is located between baffles 4 and baffles 5; the adjustable roller is fixedly installed in the machine body; the adjustable roller is located between baffles 1 and baffle 2; there are two adjustable rollers in total; the two adjustable rollers are installed opposite to each other, and a positioning rod is fixedly connected to the upper adjustable roller; the top end of the positioning rod is located outside the machine body; the positioning rod can move freely; A motor is fixedly installed; the motor is located between baffle one and baffle two; the output shaft of the motor is connected to the rotating shaft of the adjustable roller installed at the lower part of the machine body; the heating coil is installed in the machine body; the heating coil is located between baffle two and the baffle; an adjusting screw is fixedly installed above the heating coil; the upper end of the adjusting screw is located outside the machine body; a fixing nut is installed on the upper end of the adjusting screw; the upper mold is installed on the top of the machine body; the upper mold is located in the machine body; the lower mold is installed at the bottom of the machine body; the lower mold is located in the machine body; the upper mold is opposite to the lower mold; the upper mold and the lower mold are located between baffle three and baffle four; a fixing seat is fixedly installed in the machine body; the fixing seat is located between baffle four and baffle five; the guide roller is rotatably installed on the fixing seat; the guide roller, the lower mold and the adjustable roller located below the machine body are at the same height; the rectangular through hole and the guide roller are at the same height;

[0011] During operation, the boron steel pipe section is inserted into the hot forming equipment through the rectangular through hole on baffle plate 1, and the positioning rod is pulled up to move the upper adjustable roller upward, so that the boron steel pipe section can be placed between the two adjustable rollers. After placing the boron steel pipe section, the positioning rod is lowered, and the upper adjustable roller presses the boron steel pipe section downward, and then the motor 1 is started to rotate the adjustable roller, driving the boron steel pipe section to continue to move forward through the rectangular through hole on baffle plate 2; when the boron steel pipe section passes through the heating coil, the power supply of the heating coil is turned on, and the boron steel pipe section is quickly heated by induction heating, thereby avoiding oxidation and decarburization of the boron steel pipe section during the heating process, ensuring the heating effect of the bar material, and no noise and dust are generated during the heating process, which greatly improves the working environment of the workers and provides protection for the workers' health. After heating is completed, the boron steel pipe section continues to move forward through the rectangular through hole on baffle plate 3; when the boron steel pipe reaches the lower After the mold is placed, the motor stops running, so that the boron steel pipe section no longer moves forward, and the heating coil is turned off and no longer heated. After that, the upper mold moves downward under the drive of the hydraulic cylinder, and together with the lower mold, forms the heated boron steel pipe section. After the forming is completed, the upper mold stays at the dead point position for a period of time to ensure the forming effect, and then the upper mold returns to its original position, and the motor continues to start to transport the boron steel pipe section forward and pass through the rectangular through hole on the baffle four; when the formed boron steel pipe section passes through the rectangular through hole on the baffle four, the boron steel pipe section moves forward through the movement of the guide roller, reduces the temperature during the movement, and finally flows out of the rectangular through hole on the baffle five to complete the processing process; at the same time, baffles one to five relatively divide the interior of the hot forming equipment into several sections to avoid mutual influence between different processing stages, and at the same time relatively isolate the parts in the equipment to prevent damage to the equipment parts during the processing.

[0012] Preferably, the adjustable roller comprises a roller bracket, a roller and a rotating shaft; the roller bracket is rotatably mounted on the rotating shaft; the roller is mounted on the rotating shaft; the roller is symmetrically provided with two grooves one; the groove one penetrates the roller axially; a movable stopper is slidably mounted at both ends of the roller; the movable stopper is conical; stripes are arranged on the conical surface of the movable stopper; the two ends of the roller are respectively provided with grooves two in the middle direction; the left and right rotating screw rods are installed in the groove two; the two ends of the left and right rotating screw rods pass through the two movable stoppers; the two ends of the roller are fixedly mounted with a fixing plate by bolts; a protrusion is provided on the fixing plate, and the protrusion is wedge-fitted with the groove two; one end of the left and right rotating screw rods extends out of the fixing plate and is provided with a hexagonal nut; a spring is installed between the positioning rod and the adjustable roller; the spring is located in the machine body;

[0013] During operation, after the boron steel pipe section is placed on the adjustable roller, the left and right screw rods are screwed with a hexagonal wrench to rotate the left and right screw rods. Since the left and right ends of the left and right screw rods have opposite thread rotation directions, the movable blocks installed at both ends of the left and right screw rods move relative to or towards each other as the left and right screw rods rotate, thereby adjusting the position of the movable block to adapt to boron steel pipe sections of different diameters, facilitating better fixing of the boron steel pipe section, and preventing the boron steel pipe section from rotating or displacing, thereby affecting the processing accuracy; at the same time, the stripes arranged on the conical surface of the movable block can assist the clamping action of the adjustable roller and increase the clamping reliability; at the same time, the spring installed on the positioning rod can adapt to boron steel pipe sections of different diameters by itself, thereby preventing the boron steel pipe section from being loosely fixed during the process of clamping and conveying the boron steel pipe section by the adjustable roller, thereby causing the boron steel section to displace or rotate, thereby reducing the processing accuracy.

[0014] Preferably, a mounting bracket is fixedly mounted on the heating coil; there are two mounting brackets, which are located on both sides of the heating coil; a slide rail is fixedly mounted on the side wall in the vertical direction of the body; the slide rail is located between baffle plate 2 and baffle plate 3; there are two slide rails; the end of the mounting bracket is located on the slide rail; the mounting bracket can move freely on the slide rail; the inner diameter of the heating coil is larger than the diameter of the boron steel pipe section;

[0015] During operation, the mounting bracket installed on the slide rail ensures that the heating coil will not cause horizontal deviation when moving in the vertical direction. At the same time, when processing boron steel pipe sections of different diameters, the fixing nut is turned to move the adjusting screw upward or downward, driving the heating coil to move upward or downward, ensuring that the boron steel pipe section is always in the middle of the heating coil when passing through the heating coil, preventing the boron steel pipe section from contacting the heating coil due to changes in the diameter of the boron steel pipe section, and avoiding danger caused by contact between the boron steel pipe section and the heating coil. At the same time, the two mounting brackets and the adjusting screw installed on the slide rail can realize three-point positioning of the heating coil to prevent the heating coil from shaking in the machine body and causing danger.

[0016] Preferably, a hydraulic cylinder is installed on the outside of the machine body; the hydraulic cylinder is located between baffle three and baffle four; the piston rod of the hydraulic cylinder is fixedly connected to the upper surface of the upper mold; a cylinder one is fixedly installed on the inner wall of the machine body in the vertical direction; there are two cylinders in total, which are installed on two opposite vertical inner walls of the machine body; a motor two is fixedly installed on the piston rod of the cylinder one, and a mounting seat is fixedly installed on the piston rod of the other cylinder one; saw wires are installed on the motor two and the mounting seat; the saw wires are close to the side of the lower mold close to the baffle three; the saw wires are two thinner steel The wire is spirally wound on a thicker steel wire; a grinding roller is slidably mounted on the saw wire; the grinding roller is located at a section of the saw wire away from the cylinder one; a rectangular groove is arranged on the surface of the grinding roller; a spiral through hole is opened on the grinding roller; the saw wire is wedge-shaped with the spiral through hole; a stopper is fixedly connected to the motor two and the mounting seat; a through hole is opened on the stopper; the saw wire passes through the through hole without contacting the stopper; the grinding roller is located between the two stoppers; a T-shaped groove is opened on the side of the lower die close to the baffle four; the inner wall of the body in the vertical direction is provided with a A cylinder 2 is fixedly installed; there are two cylinders 2, which are installed on two opposite vertical inner walls in the machine body; the cylinder 1 is located on the right side of the cylinder 2; the piston rods of the two cylinders 2 are fixedly connected to the positioning baffle; the positioning baffle is close to the measuring surface of the lower mold close to the baffle 4; a protrusion is provided on the positioning baffle, and the protrusion is wedge-fitted with the T-shaped groove provided on the lower mold; an air inlet hole 1 is provided on the measuring surface of the upper mold; an air duct 1 is provided in the upper mold, and the outlet of the air duct 1 is located on the working surface of the upper mold; the air inlet hole 1 is connected with the air duct 1; the upper mold working A plurality of arc-shaped grooves are provided on the surface; the arc-shaped grooves are connected to the outlet of airway 1; an airbag 1 is fixedly connected to the lower surface of the upper mold; the airbag 1 is connected to the cylinder 1 through a pipeline; an air inlet 2 is provided on the side surface of the lower mold; an airway 2 is provided in the lower mold, and the outlet of the airway 2 is located on the working surface of the lower mold; the air inlet 2 is connected to the airway 2; a plurality of arc-shaped grooves are provided on the working surface of the lower mold; the arc-shaped grooves are connected to the outlet of the airway 2; an airbag 2 is fixedly connected to the lower surface of the lower mold; the air inlet 1 and the air inlet 2 are connected to the external high-pressure air source;

[0017] During operation, when the boron steel pipe section passes through the heating coil, cylinder 2 starts, driving the positioning baffle fixedly connected to the piston rod of cylinder 2 to move upward, so that the boron steel pipe section is blocked by the positioning baffle when it reaches the lower die, preventing the boron steel pipe section from exceeding the range of the lower die. When the boron steel pipe section is blocked by the positioning baffle, motor 1 stops rotating and motor 2 is started at the same time. The upper die moves downward under the action of the hydraulic cylinder until the upper die contacts the lower die. When the upper die contacts the lower die, airbag 1 installed on the upper die and airbag 2 installed on the lower die begin to squeeze each other, causing the air pressure in airbag 1 and airbag 2 to increase, so that the cylinder connected to airbag 1 starts to work, causing the piston rod of cylinder 1 to move downward, causing the motor fixedly connected to the piston rod of cylinder 1 to Motor 2 and the mounting seat move downward. Since the saw wire is installed on motor 2 and the mounting seat, when the piston rod of cylinder 1 moves downward, the saw wire contacts the boron steel pipe section. Due to the operation of motor 2, the saw wire is operated, thereby cutting the boron steel pipe section. Since the saw wire is made of two thinner steel wires spirally wound on a thicker steel wire, the saw wire has a better cutting effect on the boron steel pipe section and a faster cutting speed. The grinding roller slidably installed on the saw wire is similar to a screw rod and a nut when the saw wire moves. Therefore, the grinding roller rotates when the saw wire moves. The stopper installed on motor 2 and the mounting seat blocks the axial movement of the grinding roller, ensuring that the grinding roller rotates under the action of the saw wire, rather than the grinding roller moving with the saw wire. Since the grinding roller is in close contact with the boron steel pipe Below the cutting surface of the segment, when the grinding roller moves, the cross-section after the saw wire cutting is ground to prevent unevenness on the cut or burrs from causing danger; at the same time, due to the rectangular grooves set on the surface of the grinding roller, the debris falling off during the grinding process of the grinding roller will fall into the rectangular grooves on the surface of the grinding roller, and then as the grinding roller rotates, the debris will be thrown into the boron steel pipe segment to prevent the fallen debris from accumulating inside the machine and affecting the use of the machine; when the upper die reaches the dead point position, it is maintained for a period of time, and at the same time, motor 1 is started to reverse, and the boron steel pipe segment is pulled back until the boron steel pipe segment leaves the heating coil; when the upper die returns to its original position, cylinder 2 is started, and the piston rod of cylinder 2 returns to its original position, thereby causing the positioning baffle to fall; when the upper die returns to its original position During the positioning process, airbag 1 and airbag 2 are separated from each other and no longer squeezed. Airbag 1 returns to its original state and is in a negative pressure state inside, so that the cylinder starts to work and the piston rod of cylinder 1 moves upward, thereby returning the saw wire to its original position; at the same time, motor 1 is started again to rotate forward until the boron steel pipe passes through the heating coil and comes to the lower die, and the workpiece processed on the lower die is ejected at the same time. After the workpiece is ejected, cylinder 2 is started to prevent the boron steel pipe section from exceeding the range of the lower die; at the same time, when the upper die is kept at the dead point position, the external high-pressure source introduces high-pressure gas into the upper die and the lower die through the air inlet holes 1 and 2 to cool the die, so that the boron steel pipe section in the die is quickly cooled, completing the transformation between the austenite structure and the martensite structure;Through the cooperation between the positioning baffle and the saw wire, the boron steel pipe section can be separated at the same time as the processing is completed, so as to avoid the workpieces after processing still being connected together and needing to be cut and separated later. Reducing the operation process can reduce costs, and the cutting surface can be polished at the same time as the cutting is completed to ensure the flatness and smoothness of the cutting surface, and avoid the safety hazards caused by burrs on the cutting surface. At the same time, the positioning baffle can ensure the accurate position of the boron steel pipe section and improve the processing accuracy. ;

[0018] Preferably, a water tank is fixedly installed on the outside of the machine body; the water tank is located between baffle plate four and baffle plate five; the water tank is connected to airbag two through a pipeline; a fixed bracket is installed in the machine body; there are two groups of fixed brackets, each group has four brackets; water spray plates are fixedly installed on the two groups of fixed brackets; there is an inclination between the water spray plates and the horizontal direction; the two water spray plates are mirror images of each other; the water spray plates are connected through pipeline one; the high-pressure water pump is connected to pipeline one through pipeline two; the guide roller is located directly below the water spray plate; an air suction hood is provided below the guide roller; the air suction hood is connected to the external negative pressure fan;

[0019] During operation, the processed workpiece passes over the guide roller. At this time, the temperature of the workpiece is still high and needs to be cooled quickly to prevent the high temperature from causing danger after the workpiece leaves the forming equipment. The water in the water tank flows into the water spray plate, and the water spray plate sprays water outward, and the water falls on the workpiece to cool the workpiece. At the same time, when the upper mold moves downward under the action of the hydraulic cylinder until the upper mold contacts the lower mold, the airbag 1 installed on the upper mold and the airbag 2 installed on the lower mold begin to squeeze each other, so that the air pressure in the airbag 1 and the airbag 2 increases, so the gas in the airbag 2 is filled into the water tank, increasing the pressure in the water tank, so that the water in the water tank can flow smoothly to the water spray plate, and when the upper mold returns to its original position, the airbag 1 The same as airbag 2 returns to its original state, and the gas in the water tank returns to airbag 2, reducing the pressure in the water tank and stopping the water flow to the water spray plate, thereby stopping the water spray plate from spraying water and avoiding wasting cooling water. At the same time, the suction hood arranged under the guide roller draws air outward under the action of the external negative pressure fan, and draws away the water vapor evaporated from the high temperature of the workpiece, thereby quickly reducing the temperature of the workpiece. At the same time, the negative pressure exhaust can also make the rapid cooling section relatively sealed from other sections in the equipment to prevent water vapor from floating in the equipment and causing damage to parts. At the same time, through the combination of water cooling and air cooling, while ensuring a certain cooling speed, the damage to the workpiece caused by rapid cooling is reduced, and there will be no problems affecting the quality and speed of the work.

[0020] Preferably, there is an inclination angle between the inner wall at the lower part of the body and the horizontal direction; the inclined inner wall is located between baffle four and baffle five; the cooling water outlet is located at the lowest point of the inclined inner wall; when working, the water sprayed by the water spray plate will eventually fall on the inner wall at the lower part of the body, and by setting the inclination angle between the inner wall and the horizontal direction, the fallen water automatically flows out from the cooling water outlet to prevent the body from accumulating a large amount of water and affecting the safety of the equipment. At the same time, the iron strips that fall off the workpiece are taken out of the body through the flow of water to prevent the fallen iron strips from accumulating in the body, affecting the operation of the equipment and causing safety hazards.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. In this process, by setting adjustable rollers, heating coils and adjusting screws, the equipment can adapt to boron steel pipes of different diameters within a certain range, which is convenient for practical use. At the same time, the position of the heating coil can be adjusted by adjusting the screw to prevent the boron steel pipe from hitting the heating coil due to different diameters, which may cause danger. At the same time, the heating coil can be heated quickly, avoiding oxidation and decarburization of the boron steel pipe section during the heating process, ensuring the heating effect of the boron steel pipe section, and no noise and dust will be generated during the heating process, which greatly improves the working environment of the workers and provides protection for their health. At the same time, the mold section is adjacent to the heating section and is separated by only three baffles, which reduces the residence time of the boron steel pipe section in the outside world after heating.

[0023] 2. In this process, by setting cylinder one, motor two, saw wire, mounting seat, cylinder two and positioning baffle, it is ensured that during the processing, the boron steel pipe section is always accurately located in the mold and will not exceed the mold. After the processing is completed, the processed workpiece can be separated from the boron steel pipe section at the same time, which is convenient for subsequent processing and reduces manual operation.

[0024] 3. In this process, by setting air inlet hole 1, air inlet hole 2, air suction hood and water spray plate, the boron steel pipe can be cooled quickly during the forming process to complete the transformation between austenite and martensite. At the same time, after the forming is completed, the temperature can be quickly reduced to prevent safety hazards caused by excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a process flow chart of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the upper mold and the lower mold of the present invention;

[0029] Figure 4It is a structural schematic diagram of the adjustable roller of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the saw wire of the present invention;

[0031] In the figure: body 1, baffle 1 11, baffle 2 12, baffle 3 13, baffle 4 14, baffle 5 15, cooling water outlet 16, adjustable roller 2, roller bracket 21, roller 22, rotating shaft 23, movable block 24, left and right screw rods 25, fixing plate 26, positioning rod 27, motor 1 28, heating coil 3, mounting bracket 31, slide rail 32, adjusting screw 33, fixing nut 34, hydraulic cylinder 4, upper die 41, Air inlet hole 1 411, air bag 1 412, lower die 42, air inlet hole 2 421, T-slot 422, air bag 2 423, cylinder 1 43, motor 2 431, saw wire 432, mounting seat 433, grinding roller 434, blocking seat 435, cylinder 2 44, positioning baffle 441, fixing seat 5, guide roller 51, air suction cover 52, water spray plate 53, fixing bracket 531, pipe 1 54, water storage tank 55, pipe 2 551. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figures 1 to 5 As shown, the hot forming process of a uniform cross-section boron steel pipe according to the present invention comprises the following steps:

[0034] S1: Cutting the raw boron steel pipe into shorter boron steel pipe sections for easy processing;

[0035] S2: Processing the boron steel pipe section obtained in step S1 into a finished product using a hot forming device;

[0036] The thermoforming equipment used in the process includes a machine body 1, an adjustable roller 2, a heating coil 3, an upper mold 41, a lower mold 42 and a guide roller 51; the machine body 1 is hollow inside; the machine body 1 includes a baffle 11, a baffle 2 12, a baffle 3 13, a baffle 4 14, a baffle 5 15, and a cooling water outlet 16; the baffles 1 11 to 15 are sequentially installed in the machine body 1 from right to left; the baffles 1 11 to 15 are all provided with rectangular through holes of equal size; the rectangular through holes are located at the same height in the machine body 1; the baffles 11 and 15 are arranged at the same height. Baffle plate five 15 are respectively installed at both ends of the body 1; the cooling water outlet 16 is installed on the side of the body 1; the cooling water outlet 16 is located between baffle plate four 14 and baffle plate five 15; the adjustable roller 2 is fixedly installed in the body 1; the adjustable roller 2 is located between baffle plate one 11 and baffle plate two 12; there are two adjustable rollers 2; the two adjustable rollers 2 are installed opposite to each other, and a positioning rod 27 is fixedly connected to the upper adjustable roller 2; the top end of the positioning rod 27 is located outside the body 1; the positioning rod 27 can move freely; the body 1 is fixedly installed A motor 28 is installed; the motor 28 is located between baffle 11 and baffle 2 12; the output shaft of the motor 28 is connected to the rotating shaft 23 installed on the adjustable roller 2 at the lower part of the body 1; the heating coil 3 is installed in the body 1; the heating coil 3 is located between baffle 2 12 and the baffle; an adjusting screw 33 is fixedly installed above the heating coil 3; the upper end of the adjusting screw 33 is located outside the body 1; a fixing nut 34 is installed on the upper end of the adjusting screw 33; the upper mold 41 is installed on the top of the body 1; the upper mold 41 is located in the machine body 1; the lower die 42 is installed at the bottom of the machine body 1; the lower die 42 is located in the machine body 1; the upper die 41 is opposite to the lower die 42; the upper die 41 and the lower die 42 are located between the baffle three 13 and the baffle four 14; a fixing seat 5 is fixedly installed in the machine body 1; the fixing seat 5 is located between the baffle four 14 and the baffle five 15; the guide roller 51 is rotatably installed on the fixing seat 5; the guide roller 51, the lower die 42 and the adjustable roller 2 located below the machine body 1 are at the same height; the rectangular through hole and the guide roller 51 are at the same height;

[0037] During operation, the boron steel pipe section is inserted into the hot forming equipment through the rectangular through hole on the baffle plate 11, and the positioning rod 27 is pulled up to make the upper adjustable roller 2 move upward, so that the boron steel pipe section can be placed between the two adjustable rollers 2. After the boron steel pipe section is placed, the positioning rod 27 is lowered, and the upper adjustable roller 2 presses the boron steel pipe section downward, and then the motor 28 is started, so that the adjustable roller 2 rotates, driving the boron steel pipe section to continue to move forward through the rectangular through hole on the baffle plate 2 12; when the boron steel pipe section passes through the heating coil 3, the power supply of the heating coil 3 is turned on, and the boron steel pipe section is quickly heated by induction heating, thereby avoiding oxidation and decarburization of the boron steel pipe section during the heating process, ensuring the heating effect of the boron steel pipe section, and no noise and dust are generated during the heating process, which greatly improves the working environment of the workers and provides protection for the workers' health. After heating is completed, the boron steel pipe section continues to move forward through the rectangular through hole on the baffle plate 3 13; when the boron steel pipe reaches the upper surface of the lower die 42 Afterwards, the motor 28 stops running, so that the boron steel pipe section no longer moves forward, and the heating coil 3 turns off the power and stops heating. Afterwards, the upper mold 41 moves downward under the drive of the hydraulic cylinder 4, and together with the lower mold 42, forms the heated boron steel pipe section. After the forming is completed, the upper mold 41 stays at the dead point position for a period of time to ensure the forming effect, and then the upper mold 41 returns to its original position, and the motor 28 continues to start to convey the boron steel pipe section forward and pass through the rectangular through hole on the baffle four 14; after the formed boron steel pipe section passes through the rectangular through hole on the baffle four 14, the boron steel pipe section moves forward through the movement of the guide roller 51, reduces the temperature during the movement, and finally flows out of the hot forming equipment from the rectangular through hole on the baffle five 15 to complete the processing process; at the same time, the baffles 11 to 15 relatively divide the interior of the hot forming equipment into several sections to avoid mutual influence between different processing stages, and at the same time relatively isolate the parts in the equipment to prevent damage to the equipment parts during the processing.

[0038] Preferably, the adjustable roller 2 comprises a roller bracket 21, a roller 22 and a rotating shaft 23; the rotating shaft 23 is rotatably mounted on the roller bracket 21; the roller 22 is mounted on the rotating shaft 23; two grooves 1 are symmetrically provided on the roller 22; the groove 1 penetrates the roller 22 along the axial direction; movable stoppers 24 are slidably mounted at both ends of the roller 22; the movable stoppers 24 are conical; stripes are arranged on the conical surface of the movable stoppers 24; the two ends of the roller 22 are oriented in the middle direction A groove 2 is respectively provided; a left and right screw rod 25 is installed in the groove 2; both ends of the left and right screw rod 25 pass through two movable blocks 24; both ends of the roller 22 are fixedly installed with a fixing plate 26 by bolts; a protrusion is provided on the fixing plate 26, and the protrusion is wedged with the groove 2; one end of the left and right screw rod 25 extends out of the fixing plate 26 and is provided with a hexagonal nut; a spring is installed between the positioning rod 27 and the adjustable roller 2; the spring is located in the machine body 1;

[0039] During operation, after the boron steel pipe section is placed on the adjustable roller 2, the left and right screw rods 25 are screwed by a hexagonal wrench to rotate the left and right screw rods 25. Since the left and right ends of the left and right screw rods 25 have opposite thread rotation directions, the movable blocks 24 installed at both ends of the left and right screw rods 25 move relative to or toward each other as the left and right screw rods 25 rotate, thereby adjusting the position of the movable block 24 to adapt to boron steel pipe sections of different diameters, facilitating better fixing of the boron steel pipe section, and preventing the boron steel pipe section from rotating or displacing, thereby affecting the processing accuracy; at the same time, the stripes arranged on the conical surface of the movable block 24 can assist the clamping action of the adjustable roller 2 and increase the clamping reliability; at the same time, the spring installed on the positioning rod 27 can adapt to boron steel pipe sections of different diameters by itself, thereby preventing the boron steel pipe section from being loosely fixed during the process of clamping and conveying the boron steel pipe section by the adjustable roller 2, thereby causing the boron steel section to displace or rotate, thereby reducing the processing accuracy.

[0040] Preferably, a mounting bracket 31 is fixedly mounted on the heating coil 3; there are two mounting brackets 31, which are located on both sides of the heating coil 3; a slide rail 32 is fixedly mounted on the vertical side wall of the body 1; the slide rail 32 is located between the baffle 2 12 and the baffle 3 13; there are two slide rails 32; the end of the mounting bracket 31 is located on the slide rail 32; the mounting bracket 31 can move freely on the slide rail 32; the inner diameter of the heating coil 3 is larger than the diameter of the boron steel pipe section;

[0041] During operation, the mounting bracket 31 installed on the slide rail 32 ensures that the heating coil 3 will not cause horizontal deviation when moving in the vertical direction. At the same time, when processing boron steel pipe sections of different diameters, the fixing nut 34 is rotated to make the adjusting screw 33 move upward or downward, driving the heating coil 3 to move upward or downward, ensuring that the boron steel pipe section is always in the middle of the heating coil 3 when passing through the heating coil 3, preventing the boron steel pipe section from contacting the heating coil 3 due to changes in the diameter of the boron steel pipe section, and avoiding the danger caused by the contact between the boron steel pipe section and the heating coil 3. At the same time, the two mounting brackets 31 and the adjusting screw 33 installed on the slide rail 32 can realize three-point positioning of the heating coil 3 to prevent the heating coil 3 from shaking in the machine body 1 and causing danger.

[0042] Preferably, a hydraulic cylinder 4 is installed on the outside of the body 1; the hydraulic cylinder 4 is located between the baffle three 13 and the baffle four 14; the piston rod of the hydraulic cylinder 4 is fixedly connected to the upper surface of the upper mold 41; a cylinder 1 43 is fixedly installed on the inner wall of the body 1 in the vertical direction; there are two cylinders 1 43, which are installed on two opposite vertical inner walls in the body 1; a motor 2 431 is fixedly installed on the piston rod of the cylinder 1 43, and a mounting seat 433 is fixedly installed on the piston rod of the other cylinder 1 43; saw wires 432 are installed on the motor 2 431 and the mounting seat 433; the saw wires 432 are close to the side of the lower mold 42 close to the baffle three 13; the saw wires 432 are two thinner The steel wire is spirally wound on a thicker steel wire; a grinding roller 434 is slidably mounted on the saw wire 432; the grinding roller 434 is located at a section of the saw wire 432 away from the cylinder 1 43; a rectangular groove is arranged on the surface of the grinding roller; a spiral through hole is opened on the grinding roller 434; the saw wire 432 is wedged with the spiral through hole; a stopper 435 is fixedly connected to the motor 2 431 and the mounting seat 433; a through hole is opened on the stopper 435; the saw wire 432 passes through the through hole and does not contact the stopper 435; the grinding roller 434 is located between the two stoppers 435; a T-shaped slot 422 is opened on the side of the lower mold 42 close to the baffle 414; the machine body 1 A cylinder 2 44 is fixedly installed on the inner wall in the vertical direction; there are two cylinders 2 44, which are installed on two opposite vertical inner walls in the machine body 1; the cylinder 1 43 is located on the right side of the cylinder 2 44; the piston rods of the two cylinders 2 44 are fixedly connected to the positioning baffle 441; the positioning baffle 441 is close to the surface of the lower mold 42 close to the baffle 414; the positioning baffle 441 is provided with a protrusion, and the protrusion is wedge-fitted with the T-shaped groove 422 provided on the lower mold 42; the surface of the upper mold 41 is provided with an air inlet 1 411; an air duct 1 is provided in the upper mold 41, and the outlet of the air duct 1 is located on the working surface of the upper mold 41; the air inlet 1 411 is communicated with the air duct 1; The upper mold 41 has a plurality of arc grooves on its working surface; the arc grooves are connected to the outlet of airway one; an airbag 1 412 is fixedly connected to the lower surface of the upper mold 41; the airbag 1 412 is connected to the cylinder 1 43 through a pipeline; an air inlet 2 421 is provided on the side surface of the lower mold 42; an airway 2 is provided in the lower mold 42, and the outlet of the airway 2 is located on the working surface of the lower mold 42; the air inlet 2 421 is connected to the airway 2; the lower mold 42 has a plurality of arc grooves on its working surface; the arc grooves are connected to the outlet of the airway 2; an airbag 2 423 is fixedly connected to the lower surface of the lower mold 42; the air inlet 1 411 and the air inlet 2 421 are connected to an external high-pressure air source;

[0043] During operation, when the boron steel pipe section passes through the heating coil 3, the cylinder 2 44 is started, driving the positioning baffle 441 fixedly connected to the piston rod of the cylinder 2 44 to move upward, so that the boron steel pipe section is blocked by the positioning baffle 441 when it reaches the lower mold 42, preventing the boron steel pipe section from exceeding the range of the lower mold 42. When the boron steel pipe section is blocked by the positioning baffle 441, the motor 1 28 stops rotating, and the motor 2 431 is started at the same time. The upper mold 41 moves downward under the action of the hydraulic cylinder 4 until the upper mold 41 contacts the lower mold 42. When the upper mold 41 contacts the lower mold 42, the airbag 1 412 installed on the upper mold 41 and the airbag 2 423 installed on the lower mold 42 begin to squeeze each other, so that the air pressure in the airbag 1 412 and the airbag 2 423 increases, thereby The cylinder 1 43 connected to the air bag 1 412 starts to work, so that the piston rod of the cylinder 1 43 moves downward, and the motor 2 431 and the mounting seat 433 fixed on the piston rod of the cylinder 1 43 move downward. Since the saw wire 432 is installed on the motor 2 431 and the mounting seat 433, when the piston rod of the cylinder 1 43 moves downward, the saw wire 432 contacts the boron steel pipe section, and the operation of the motor 2 431 causes the saw wire 432 to operate, thereby cutting the boron steel pipe section; since the saw wire 432 is made of two thinner steel wires spirally wound around a thicker steel wire, the saw wire 432 has a better cutting effect on the boron steel pipe section and a faster cutting speed, the grinding roller 434 slidably installed on the saw wire 432, when the saw wire 432 moves The two are similar to screw rods and nut, so the grinding roller 434 rotates when the saw wire 432 moves, and the stopper 435 installed on the motor 2 431 and the mounting seat 433 blocks the axial movement of the grinding roller 434, ensuring that the grinding roller 434 rotates under the action of the saw wire 432, rather than the grinding roller 434 moving with the saw wire 432; because the grinding roller 434 is located below the cutting surface of the boron steel pipe section, when the grinding roller 434 moves, the cross-section of the saw wire 432 after cutting is polished to prevent the incision from being uneven or burrs from causing danger; at the same time, due to the rectangular grooves set on the surface of the grinding roller 434, the debris that falls off during the grinding process of the grinding roller 434 will fall into the rectangular grooves on the surface of the grinding roller 434, and then as the grinding roller 434 rotates, The debris is thrown into the boron steel pipe section to prevent the fallen debris from accumulating inside the machine and affecting the use of the machine; when the upper mold 41 reaches the dead point position, it is kept for a period of time, and at the same time, the motor 28 is started to reverse and the boron steel pipe section is pulled back until the boron steel pipe section leaves the heating coil 3; when the upper mold 41 returns to its original position, the cylinder 2 44 is started, and the piston rod of the cylinder 2 44 returns to its original position, so that the positioning baffle 441 falls down; in the process of the upper mold 41 returning to its original position, the airbag 1 412 and the airbag 2 423 are separated from each other and no longer squeezed, and the airbag 1 412 returns to its original state, and the interior is in a negative pressure state, so that the cylinder 1 43 starts to work, and the piston rod of the cylinder 1 43 moves upward, so that the saw wire 432 returns to its original position;At the same time, the motor 28 is started again to rotate forward until the boron steel tube passes through the heating coil 3 and reaches the lower mold 42, and the workpiece processed on the lower mold 42 is ejected. After the workpiece is ejected, the cylinder 2 44 is started to prevent the boron steel tube section from exceeding the range of the lower mold 42; at the same time, when the upper mold 41 is maintained at the dead point position, the external high-pressure source passes high-pressure gas into the upper mold 41 and the lower mold 42 through the air inlet 1 411 and the air inlet 2 421 to cool the mold, so that the boron steel tube section in the mold is quickly cooled to complete the transformation between the austenite structure and the martensite structure; through the cooperation between the positioning baffle 441 and the saw wire 432, the boron steel tube section can be separated while the processing is completed, so as to avoid the processed workpieces being still connected together and requiring subsequent cutting and separation, reducing the operation process and reducing costs, and grinding the cut surface while completing the cutting to ensure the flatness and smoothness of the cut surface and avoid the safety hazards caused by burrs on the cut surface. At the same time, the positioning baffle 441 can ensure the accurate position of the boron steel tube section and improve the processing accuracy. ;

[0044] Preferably, a water tank 55 is fixedly installed on the outside of the body 1; the water tank 55 is located between the baffle four 14 and the baffle five 15; the water tank 55 is connected to the airbag two 423 through a pipeline; a fixed bracket 531 is installed in the body 1; there are two groups of fixed brackets 531, each group has four brackets; the two groups of fixed brackets 531 are fixedly installed with water spray plates 53; there is an inclination between the water spray plates 53 and the horizontal direction; the two water spray plates 53 are mirror images of each other; the water spray plates 53 are connected through a pipeline one 54; the high-pressure water pump 55 is connected to the pipeline one 54 through the pipeline two 55; the guide roller 51 is located directly below the water spray plate 53; an air suction hood 52 is provided below the guide roller 51; the air suction hood 52 is connected to the external negative pressure fan;

[0045] During operation, the processed workpiece passes over the guide roller 51. At this time, the temperature of the workpiece is still high and it needs to be cooled quickly to prevent the workpiece from being dangerous due to high temperature after leaving the molding equipment. The water in the water tank 55 flows into the water spray plate 53, and the water spray plate 53 sprays water outward, and the water spray falls on the workpiece to cool the workpiece. At the same time, when the upper mold 41 moves downward under the action of the hydraulic cylinder 4 until the upper mold 41 contacts the lower mold 42, the airbag 1 412 installed on the upper mold 41 and the airbag 2 423 installed on the lower mold 42 begin to squeeze each other, so that the air pressure in the airbag 1 412 and the airbag 2 423 increases, so the gas in the airbag 2 423 is filled into the water tank 55, the pressure in the water tank 55 is increased, so that the water in the water tank 55 can smoothly flow to the water spray plate 53. When 41 returns to its original position, airbag 1 412 and airbag 2 423 also return to their original states, and the gas in the water tank 55 returns to airbag 2 423, so that the pressure in the water tank 55 is reduced, and the water flow to the water spray plate 53 is stopped, thereby stopping the water spray plate 53 from spraying water, thereby avoiding wasting cooling water; at the same time, the suction hood 52 arranged under the guide roller 51 draws air outward under the action of the external negative pressure fan, and draws away the water vapor evaporated from the high temperature of the workpiece, thereby quickly reducing the temperature of the workpiece. At the same time, the negative pressure exhaust can also make the rapid cooling section and other sections in the equipment relatively sealed, thereby preventing water vapor from floating in the equipment and causing damage to parts. At the same time, by combining water cooling and air cooling, while ensuring a certain cooling rate, the damage to the workpiece caused by rapid cooling is reduced, and there will be no problems affecting the quality and speed of the work.

[0046] Preferably, there is an inclination angle between the inner wall at the lower part of the body 1 and the horizontal direction; the inclined inner wall is located between baffle four 14 and baffle five 15; the cooling water outlet 16 is located at the lowest point of the inclined inner wall; when working, the water sprayed by the water spray plate 53 will eventually fall on the inner wall at the lower part of the body 1. By setting the inclination angle between the inner wall and the horizontal direction, the falling water automatically flows out from the cooling water outlet 16, preventing the body 1 from accumulating a large amount of water and affecting the safety of the equipment. At the same time, through the flow of water, the iron sheet detached from the workpiece is taken out of the body 1, preventing the detached iron sheet from accumulating in the body 1, affecting the operation of the equipment and causing safety hazards.

[0047] The specific workflow is as follows:

[0048] During operation, the boron steel pipe section is inserted into the hot forming equipment through the rectangular through hole on the baffle plate 11, and the positioning rod 27 is pulled up to move the upper adjustable roller 2 upward, so that the boron steel pipe section can be placed between the two adjustable rollers 2. After the boron steel pipe section is placed, the positioning rod 27 is lowered, and the upper adjustable roller 2 presses the boron steel pipe section downward, and then the motor 28 is started to rotate the adjustable roller 2, driving the boron steel pipe section to continue to move forward through the rectangular through hole on the baffle plate 2 12; when the boron steel pipe section passes through the heating coil 3, the cylinder 2 44 is started, driving the positioning baffle 441 fixedly connected to the piston rod of the cylinder 2 44 to move upward, so that the boron steel pipe section is blocked by the positioning baffle 441 when it reaches the lower mold 42, preventing the boron steel pipe section from exceeding the range of the lower mold 42 When the boron steel pipe section is blocked by the positioning baffle 441, the motor 28 stops rotating and the motor 2 431 is started at the same time. The upper mold 41 moves downward under the action of the hydraulic cylinder 4 until the upper mold 41 contacts the lower mold 42. When the upper mold 41 contacts the lower mold 42, the airbag 1 412 installed on the upper mold 41 and the airbag 2 423 installed on the lower mold 42 begin to squeeze each other, so that the air pressure in the airbag 1 412 and the airbag 2 423 increases, so that the cylinder 1 43 connected to the airbag 1 412 starts to work, so that the piston rod of the cylinder 1 43 moves downward, and the motor 2 431 and the mounting seat 433 fixed on the piston rod of the cylinder 1 43 move downward. Since the saw wire 432 is installed on the motor 2 431 and the mounting seat 433, the cylinder When the piston rod 43 moves downward, the saw wire 432 contacts the boron steel pipe section, and the operation of the motor 431 causes the saw wire 432 to operate, thereby cutting the boron steel pipe section; since the saw wire 432 is made of two thinner steel wires spirally wound around a thicker steel wire, the saw wire 432 has a better cutting effect on the boron steel pipe section and a faster cutting speed, and the grinding roller 434 slidably installed on the saw wire 432 is similar to a screw rod and a nut between the two when the saw wire 432 moves, so the grinding roller 434 rotates when the saw wire 432 moves, and the stopper 435 installed on the motor 431 and the mounting seat 433 blocks the axial movement of the grinding roller 434, ensuring that the grinding roller 434 rotates under the action of the saw wire 432, rather than the grinding roller 434 It moves with the saw wire 432; because the grinding roller 434 is located below the cutting surface of the boron steel pipe section, when the grinding roller 434 moves, the cross section after the saw wire 432 is cut is ground; at the same time, due to the rectangular grooves set on the surface of the grinding roller 434, the debris that falls off during the grinding process of the grinding roller 434 will fall into the rectangular grooves on the surface of the grinding roller 434, and then as the grinding roller 434 rotates, the debris will be thrown into the boron steel pipe section; when the upper mold 41 reaches the dead point position, it is kept for a period of time, and at the same time, the motor 1 28 is started to reverse, and the boron steel pipe section is pulled back until the boron steel pipe section leaves the heating coil 3; when the upper mold 41 returns to its original position, the cylinder 2 44 is started, so that the piston rod of the cylinder 2 44 returns to its original position, thereby causing the positioning baffle 441 to fall;When the upper die 41 returns to its original position, the airbag 1 412 and the airbag 2 423 separate from each other and are no longer squeezed. The airbag 1 412 returns to its original state and is in a negative pressure state inside, so that the cylinder 1 43 starts to work and the piston rod of the cylinder 1 43 moves upward, thereby returning the saw wire 432 to its original position. At the same time, the motor 1 28 is started again to rotate forward until the boron steel pipe passes through the heating coil 3 and comes to the lower die 42, and the workpiece processed on the lower die 42 is ejected. After the workpiece is ejected, the cylinder 2 44 is started to prevent the boron steel pipe section from exceeding the lower die 42. At the same time, when the upper mold 41 is kept at the dead point, the external high pressure source introduces high pressure gas into the upper mold 41 and the lower mold 42 through the air inlet 1 411 and the air inlet 2 421 to cool the mold and quickly cool the boron steel pipe section in the mold; the processed workpiece passes over the guide roller 51, and the temperature of the workpiece is still high at this time, and it needs to be quickly cooled to prevent the workpiece from being dangerous due to high temperature after leaving the molding equipment, and the water in the water storage tank 55 flows into the water spray plate 53, and the water spray plate 53 sprays water outwards. The mold 41 moves downward under the action of the hydraulic cylinder 4 until the upper mold 41 contacts the lower mold 42. Then, the airbag 1 412 installed on the upper mold 41 and the airbag 2 423 installed on the lower mold 42 begin to squeeze each other, so that the air pressure in the airbag 1 412 and the airbag 2 423 increases. Therefore, the gas in the airbag 2 423 is filled into the water tank 55, increasing the pressure in the water tank 55, so that the water in the water tank 55 can flow smoothly into the water spray plate 53. When the upper mold 41 returns to its original position, the airbag 1 412 and the airbag 2 423 also return to their original state. The gas in the water tank 55 returns to the air bag 2 423, reducing the pressure in the water tank 55, stopping the water flow to the water spray plate 53, and thus stopping the water spray plate 53 from spraying water; at the same time, the air suction hood 52 arranged below the guide roller 51 draws air outward under the action of the external negative pressure fan, extracting the water vapor evaporated from the workpiece at high temperature, and quickly reducing the temperature of the workpiece; the water sprayed by the water spray plate 53 will eventually fall on the inner wall below the machine body 1, and by setting the inclination angle between the inner wall and the horizontal direction, the falling water automatically flows out from the cooling water outlet 16. ;

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hot forming process for a uniform cross-section boron steel pipe, characterized in that: This process includes the following steps: S1: Cutting the raw boron steel pipe into shorter boron steel pipe sections for easy processing; S2: Processing the boron steel pipe section obtained in step S1 into a finished product using a hot forming device; The thermoforming equipment used in the process comprises a machine body (1), an adjustable roller (2), a heating coil (3), an upper mold (41), a lower mold (42) and a guide roller (51); the machine body (1) is hollow inside; the machine body (1) comprises a baffle plate 1 (11), a baffle plate 2 (12), a baffle plate 3 (13), a baffle plate 4 (14), a baffle plate 5 (15) and a cooling water outlet (16); the baffle plates 1 (11) to 5 (15) are sequentially installed in the machine body (1) from right to left; the baffle plates 1 (11) to 5 (15) are all provided with rectangular through holes of equal size; the rectangular through holes are located at the same height in the machine body (1); the baffle plates 1 (11) and 12 are arranged at the same height as each other. Plate five (15) is respectively installed at both ends of the body (1); the cooling water outlet (16) is installed on the side of the body (1); the cooling water outlet (16) is located between baffle four (14) and baffle five (15); the adjustable roller (2) is fixedly installed in the body (1); the adjustable roller (2) is located between baffle one (11) and baffle two (12); there are two adjustable rollers (2); the two adjustable rollers (2) are installed opposite to each other, and a positioning rod (27) is fixedly connected to the upper adjustable roller (2); the top end of the positioning rod (27) is located outside the body (1); the positioning rod (27) can move freely; a motor is fixedly installed in the body (1) The motor (28) is located between the baffle plate (11) and the baffle plate (12); the output shaft of the motor (28) is connected to the rotating shaft (23) on the adjustable roller (2) installed at the lower part of the machine body (1); the heating coil (3) is installed in the machine body (1); the heating coil (3) is located between the baffle plate (12) and the baffle plate (13); an adjusting screw (33) is fixedly installed above the heating coil (3); the upper end of the adjusting screw (33) is located outside the machine body (1); a fixing nut (34) is installed at the upper end of the adjusting screw (33); the upper mold (41) is installed at the top of the machine body (1); the upper mold (41) is located at the The machine body (1) is provided with a lower mold (42) mounted on the bottom of the machine body (1); the lower mold (42) is located in the machine body (1); the upper mold (41) is opposite to the lower mold (42); the upper mold (41) and the lower mold (42) are located between baffle three (13) and baffle four (14); a fixed seat (5) is fixedly mounted in the machine body (1); the fixed seat (5) is located between baffle four (14) and baffle five (15); the guide roller (51) is rotatably mounted on the fixed seat (5); the guide roller (51), the lower mold (42) and the adjustable roller (2) located below the machine body (1) are at the same height; the rectangular through hole and the guide roller (51) are at the same height; A mounting bracket (31) is fixedly mounted on the heating coil (3); there are two mounting brackets (31) located on both sides of the heating coil (3); a slide rail (32) is fixedly mounted on the vertical side wall of the machine body (1); the slide rail (32) is located between the second baffle (12) and the third baffle (13); there are two slide rails (32); the end of the mounting bracket (31) is located on the slide rail (32); the mounting bracket (31) can move freely on the slide rail (32); the inner diameter of the heating coil (3) is greater than the diameter of the boron steel pipe section; A hydraulic cylinder (4) is installed on the outside of the machine body (1); the hydraulic cylinder (4) is located between baffle three (13) and baffle four (14); the piston rod of the hydraulic cylinder (4) is fixedly connected to the upper surface of the upper mold (41); a cylinder one (43) is fixedly installed on the vertical inner wall of the machine body (1); there are two cylinders one (43), which are installed on two opposite vertical inner walls of the machine body (1); a motor two (431) is fixedly installed on the piston rod of the cylinder one (43), and a mounting seat (433) is fixedly installed on the piston rod of the other cylinder one (43); saw wires (432) are installed on the motor two (431) and the mounting seat (433); the saw wires (432) are closely attached to the side of the lower mold (42) close to the baffle three (13). The saw wire (432) is made of two thinner steel wires spirally wound around a thicker steel wire; a grinding roller (434) is slidably mounted on the saw wire (432); the grinding roller (434) is located at a section of the saw wire (432) away from the cylinder one (43); a spiral through hole is opened on the grinding roller (434); the saw wire (432) is wedged with the spiral through hole; a stopper (435) is fixedly connected to the motor two (431) and the mounting seat (433); a through hole is opened on the stopper (435); the saw wire (432) passes through the through hole and does not contact the stopper (435); the grinding roller (434) is located between the two stoppers (435); a T-shaped opening is opened on the side of the lower mold (42) close to the baffle four (14) shaped groove (422); a cylinder 2 (44) is fixedly mounted on the inner wall in the vertical direction of the body (1); there are two cylinders 2 (44) in total, which are mounted on two opposite vertical inner walls in the body (1); the cylinder 1 (43) is located on the right side of the cylinder 2 (44); the piston rods of the two cylinders 2 (44) are both fixedly connected to the positioning baffle (441); the positioning baffle (441) is closely attached to the side of the lower mold (42) close to the baffle 4 (14); a protrusion is arranged on the positioning baffle (441), and the protrusion is wedged with the T-shaped groove (422) arranged on the lower mold (42); an air inlet hole 1 (411) is arranged on the side of the upper mold (41); an air channel 1 is arranged in the upper mold (41), and the outlet of the air channel 1 is located at the upper mold ( 41) on the working surface; the air inlet hole 1 (411) is connected to the air channel 1; a plurality of arc-shaped grooves are provided on the working surface of the upper mold (41); the arc-shaped grooves are connected to the outlet of the air channel 1; an air bag 1 (412) is fixedly connected to the lower surface of the upper mold (41); the air bag 1 (412) is connected to the cylinder 1 (43) through a pipeline; an air inlet hole 2 (421) is provided on the side of the lower mold (42); an air channel 2 is provided in the lower mold (42), and the outlet of the air channel 2 is located on the working surface of the lower mold (42); the air inlet hole 2 (421) is connected to the air channel 2; a plurality of arc-shaped grooves are provided on the working surface of the lower mold (42); the arc-shaped grooves are connected to the outlet of the air channel 2; the air bag 2 (423) is fixedly connected to the lower surface of the lower mold (42);The air inlet hole 1 (411) and the air inlet hole 2 (421) are connected to an external high-pressure air source; A water storage tank (55) is fixedly installed on the outside of the machine body (1); the water storage tank (55) is located between baffle plate four (14) and baffle plate five (15); the water storage tank (55) is connected to airbag two (423) through a pipeline; a fixed bracket (531) is installed inside the machine body (1); there are two groups of fixed brackets (531), each group has four brackets; the two groups of fixed brackets (531) are fixedly installed with water spray plates (53); there is an inclination angle between the water spray plates (53) and the horizontal direction; the two water spray plates (53) are mirror images of each other; the water spray plates (53) are connected through pipeline one (54); the water storage tank (55) is connected to pipeline one (54) through pipeline two (551); the guide roller (51) is located directly below the water spray plate (53); an air suction hood (52) is arranged below the guide roller (51); the air suction hood (52) is connected to an external negative pressure fan.

2. The hot forming process of a uniform cross-section boron steel pipe according to claim 1, characterized in that: The adjustable roller (2) comprises a roller support (21), a roller (22) and a rotating shaft (23); the rotating shaft (23) is rotatably mounted on the roller support (21); The roller (22) is mounted on a rotating shaft (23); two grooves (1) are symmetrically provided on the roller (22); the groove (1) penetrates the roller (22) along the axial direction; movable blocks (24) are slidably installed at both ends of the roller (22); the movable blocks (24) are conical; stripes are arranged on the conical surface of the movable blocks (24); grooves (2) are respectively provided at both ends of the roller (22) toward the middle; left and right screw rods (25) are installed in the grooves (2). ; The two ends of the left and right screw rods (25) pass through two movable blocks (24); the two ends of the roller (22) are fixed with a fixing plate (26) by bolts; a protrusion is provided on the fixing plate (26), and the protrusion is wedged with the second groove; one end of the left and right screw rods (25) extends out of the fixing plate (26) and is provided with a hexagonal nut; a spring is installed between the positioning rod (27) and the adjustable roller (2); the spring is located in the machine body (1).

3. The hot forming process of a uniform cross-section boron steel pipe according to claim 1, characterized in that: There is an inclination angle between the inner wall at the lower part of the machine body (1) and the horizontal direction; the inclined inner wall is located between baffle plate four (14) and baffle plate five (15); and the cooling water outlet (16) is located at the lowest point of the inclined inner wall.

Images