Bending device for steel pipe machining

Abstract

The invention relates to the technical field of pipe fitting bending, in particular to a bending device for steel pipe machining, which comprises a base, a positioning clamping machine is fixedly mounted on the upper end face of the base, a swing frame is rotatably mounted on one side of the base, and a guide seat is fixedly mounted on the outer wall of the swing frame and close to the upper position; a two-dimensional driving device is fixedly installed at the position, close to the swing frame, of the upper end face of the base, a linear driving device is fixedly installed in the swing frame, and a fixed clamping base is fixedly installed at the output end of the linear driving device. Rotary cleaning and preheating treatment is conducted on the outer wall of the steel pipe through the cleaning and preheating assembly, surface impurities are eliminated, and follow-up heating energy consumption is reduced; the detection heating assembly adopts a vibration detection element and temperature detection element linkage mechanism, the controller is combined to dynamically adjust the heating power, self-adaptive heating of steel pipes with different wall thicknesses is achieved, uniform temperature distribution is ensured, and the internal stress concentration phenomenon is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting bending, and particularly relates to a bending device for steel pipe processing. Background Art

[0002] Existing bending devices for steel pipe processing usually use pipe benders. A pipe bender is a device used for bending pipe materials and is widely used in industries such as manufacturing, construction, automotive, and aviation. Its main function is to bend straight pipes into specified angles and radii according to requirements.

[0003] There are many existing pipe bender devices. For example, a bending device and method for steel pipe production disclosed in the patent with the publication number CN118321407B can achieve rapid multi-angle bending operations for steel pipes of various diameters, and can also make steel pipes of different diameters always be on the same center line with the bending part during bending, so that there will be no angular error during bending. It can also perform pressurized positioning and pressure-resistant support protection on the inner and outer sides of the steel pipe during bending, which can improve the stability of steel pipe bending and prevent the inner and outer sides of the steel pipe from cracking and damaging due to large deformation pressure during bending. However, the materials of pipe fittings are different, such as stainless steel, alloy steel, etc. These materials are relatively hard and are prone to cracking or deformation when bent at room temperature. Moreover, thick-walled pipes are more easily affected by internal and external stresses and are prone to deformation or breakage when bent at room temperature. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a bending device for steel pipe processing, which can effectively solve the problem that special pipe fittings are prone to cracking or deformation when bent at room temperature in the prior art.

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions: The present invention provides a bending device for steel pipe processing, including: A base, on the upper end surface of the base, a positioning and clamping machine is fixedly installed. On one side of the base, a swing frame is rotatably installed. On the outer wall of the swing frame and at a position close to the upper part, a guide seat is fixedly installed. On the upper end surface of the base and at a position close to the swing frame, a two-dimensional driving device is fixedly installed. Inside the swing frame, a linear driving device is fixedly installed, and at the output end of the linear driving device, a fixed clamping seat is fixedly installed; A cleaning and preheating assembly, the cleaning and preheating assembly includes a fixed sleeve arranged between the positioning and clamping machine and the guide seat. Inside the inner wall of the fixed sleeve, a rotating sleeve is rotatably installed. On the inner wall circumference of the rotating sleeve, a plurality of cleaning brushes are fixedly installed in an array. A circulation space is formed between the outer wall of the rotating sleeve and the inner wall of the fixed sleeve; Detect the heating component, which includes a second support frame arranged between the cleaning and preheating component and the guide seat. The second support frame is composed of two long rods and a disc integrally formed at the opposite ends of the long rods. A plurality of rotating wheels are rotatably installed in a circumferential array on the inner wall of the disc. On the side of the disc close to the guide seat, a plurality of pairs of straight rods are fixedly installed in a circumferential array. A rotating rod is elastically rotatably installed between the straight rods. A vibrating rod is fixedly installed at the end of the rotating rod close to the guide seat. Above the vibrating rod, there is a vibration detection element. The vibration detection element is electrically connected to a controller. On the side of the disc close to the guide seat, there is a heating element, and the heating element is electrically connected to the controller; The cooling and auxiliary pushing component is used to assist in pushing the pipe fittings and cooling the pipe fittings.

[0006] Preferably, a first fixed seat is fixedly installed on the upper end surface of the base. On the side of the first fixed seat close to the positioning and clamping machine, a first support frame is fixedly installed. One side of the first support frame is fixedly connected to the fixed sleeve. On one side of the first support frame, a feeding hole is opened. On one side of the first support frame and at the upper and lower ends of the feeding hole, fixed pieces are fixedly installed. A length measuring element is embedded in the fixed pieces.

[0007] Preferably, a cross bar is fixedly installed on the upper end surface of the first support frame. One end of the rotating sleeve is fixedly installed with an external sleeve. On one side of the cross bar, a rotary drive is fixedly installed. The output end of the rotary drive penetrates through the cross bar and is fixedly installed with a transmission shaft. The transmission shaft is rotatably connected to the cross bar. The transmission shaft and the external sleeve are driven by a gear pair.

[0008] Preferably, both ends of the second support frame are fixedly connected to the first fixed seat. On the upper end surface of the straight rod, a top frame is fixedly installed. A first spring is fixedly installed between the top frame and the rotating rod. On the opposite sides of the rotating rod and the rotating wheel, two magnetic attraction pieces are respectively fixedly installed. On the upper end surface of the vibrating rod and at the position corresponding to the vibration detection element, a first top block is fixedly installed. On one side of the disc, a plurality of straight plates are fixedly installed in a circumferential array. One end inner wall of the straight plate is fixedly connected to the vibration detection element.

[0009] Preferably, a U-shaped frame is fixedly installed on one side of the first fixed seat. The U-shaped frame is composed of two L-shaped rods and a ring integrally formed at the opposite ends of the L-shaped rods. The inner wall of the ring is fixedly connected to the heating element. One end of the heating element is fixedly installed with a communicating cover. A temperature detection element is fixedly installed on the inner wall of the communicating cover. The detection element is electrically connected to the controller.

[0010] Preferably, a communicating pipe is communicated with the outer wall of the communicating cover. One end of the communicating pipe penetrates through the fixed sleeve and is communicated with the circulation space; An air outlet barrel is rotatably installed on the outer wall of the fixed sleeve. The air outlet barrel and the transmission shaft are driven by a bevel gear pair. A cross bracket is fixedly installed on the inner wall of the air outlet barrel, and a fan is fixedly installed on the lower end surface of the cross bracket.

[0011] Preferably, the cooling auxiliary pushing component includes a second fixed seat fixed on the upper end surface of the base. A sliding box is fixedly installed on the upper end surface of the second fixed seat. A sliding rod is fixedly installed on the inner wall of the sliding box. A slider is slidably installed on the outer wall of the sliding rod. A second spring is fixedly installed between the slider and the sliding box. The slider is slidably connected to the inner wall of the sliding box. One end of the slider is fixedly installed with a supporting sliding rod. One end of the supporting sliding rod is fixedly installed with a first clamping head. A second clamping head is fixedly installed at the output end of the two-dimensional driving device. A plurality of flow channels are linearly arranged between the first clamping head and the second clamping head.

[0012] Preferably, first docking boxes are fixedly installed at the upper and lower ends of the second clamping head. The first docking boxes are communicated with the flow channels. Docking grooves are opened on the upper and lower end faces of the first docking boxes. Second docking boxes are fixedly installed at the upper and lower ends of the first clamping head. The second docking boxes are communicated with the flow channels. Flow covers are communicated with the upper and lower end faces of the second docking boxes. The flow covers are communicated with the flow channels; Among them, an air inlet pipe is communicated with the flow cover at the upper position, and an air outlet pipe is communicated with the flow cover at the lower position.

[0013] Preferably, an electromagnetic valve is fixedly installed on the inner wall of the air inlet pipe. The electromagnetic valve is electrically connected to the controller. One end of the air inlet pipe is communicated with a pressurizing barrel. A piston piece is hermetically slidably installed on the inner wall of the pressurizing barrel. A second one-way valve is embedded in the piston piece. A third spring is fixedly installed between the piston piece and the pressurizing barrel. A connecting pipe is rotatably installed on one side of the pressurizing barrel away from the air inlet pipe. One end of the connecting pipe penetrates through the pressurizing barrel and is fixedly installed with a rotating gear sleeve. The rotating gear sleeve is rotatably connected to the inner wall of the pressurizing barrel. A plurality of clamping grooves are circumferentially arranged on the outer wall of the rotating gear sleeve. A plurality of second top blocks are circumferentially fixedly installed on one side of the piston piece close to the rotating gear sleeve. The second top blocks are slidably connected to the clamping grooves. A first one-way valve is fixedly installed on the inner wall of the connecting pipe. The connecting pipe and the transmission shaft are driven by a gear pair. One end of the connecting pipe is connected to a cooling device; A third one-way valve is fixedly installed on the inner wall of the air outlet pipe. One end of the air outlet pipe is communicated with an airbag. A return pipe is communicated with the outer wall of the airbag. The return pipe is communicated with the cooling device.

[0014] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art: First, the outer wall of the steel pipe is rotationally cleaned and pre-heated by the cleaning and preheating component to remove surface impurities and reduce the subsequent heating energy consumption. The detection heating component adopts the linkage mechanism of the vibration detection element and the temperature detection element, and dynamically adjusts the heating power in combination with the controller to achieve the adaptive heating of steel pipes with different wall thicknesses, ensure uniform temperature distribution, and significantly reduce the phenomenon of internal stress concentration.

[0015] Second, the cooling auxiliary pushing component drives the circulating cooling system through air pressure, and precisely controls the temperature of the auxiliary pushing chuck and the contact section of the steel pipe during the bending process, effectively avoiding local deformation caused by high temperature. The mechanical linkage supercharging structure adopted uses the power of the transmission shaft to drive the circulation of the cooling gas, and cooperates with the airbag reflux design to achieve the efficient reuse of the cooling medium (air / inert gas). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of the cleaning and preheating component of the present invention; Figure 3 is a cross-sectional structural schematic diagram of the fixed sleeve of the present invention; Figure 4 is a structural schematic diagram of the detection heating component of the present invention; Figure 5 is a structural schematic diagram of the rotating rod of the present invention; Figure 6 is a structural schematic diagram of the communicating cover of the present invention; Figure 7 is a structural schematic diagram of the cooling auxiliary pushing component of the present invention; Figure 8 is a cross-sectional structural schematic diagram of the supercharging barrel of the present invention; Figure 9 is Figure 8 the enlarged structural schematic diagram at A in

[0018] Reference numerals: 1, base; 2, positioning and clamping machine; 3, swing frame; 4, fixed clamping seat; 5, two-dimensional drive device; 6, cleaning and preheating assembly; 601, first fixed seat; 602, first support frame; 603, cross bar; 604, fixing piece; 605, length measuring element; 606, fixed sleeve; 607, rotating sleeve; 608, cleaning brush; 609, external sleeve; 610, rotation drive member; 611, transmission shaft; 7, detection and heating assembly; 701, second support frame; 702, U-shaped frame; 703, heating element; 704, straight bar; 705, rotating bar; 706, top frame; 707, first spring; 708, rotating wheel; 709, magnetic attracting piece; 710, vibrating bar; 711, first top block; 712, straight plate; 713, vibration detection element; 714, communicating cover; 715, communicating pipe; 716, air outlet barrel; 717, cross support; 718, bevel gear pair; 8, cooling and auxiliary pushing assembly; 801, second fixed seat; 802, sliding box; 803, support sliding rod; 804, first chuck; 805, second chuck; 806, first docking box; 807, second docking box; 808, flow channel; 809, flow cover; 810, docking groove; 811, sliding rod; 812, second spring; 813, intake pipe; 814, pressurizing barrel; 815, piston piece; 816, connecting pipe; 818, first one-way valve; 819, rotating gear sleeve; 820, second one-way valve; 821, second top block; 822, third spring; 823, outlet pipe; 824, airbag; 825, return pipe; 9, guide seat. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Embodiment: Refer to Figures 1 to 9 , a bending device for steel pipe processing, comprising: Base 1, a positioning and clamping machine 2 is fixedly installed on the upper end surface of the base 1, a swing frame 3 is rotatably installed on one side of the base 1, a guide seat 9 is fixedly installed on the outer wall of the swing frame 3 at a position close to the upper part, a two-dimensional driving device 5 is fixedly installed on the upper end surface of the base 1 at a position close to the swing frame 3, a linear driving device is fixedly installed inside the swing frame 3, and a fixed clamping seat 4 is fixedly installed at the output end of the linear driving device. The positioning and clamping machine 2, the swing frame 3, the guide seat 9, the two-dimensional driving device 5 and the linear driving device are all existing pipe benders and pipe bender adapter devices, which will not be elaborated here; Cleaning and preheating assembly 6, the cleaning and preheating assembly 6 includes a fixed sleeve 606 arranged between the positioning and clamping machine 2 and the guide seat 9. A rotating sleeve 607 is rotatably installed on the inner wall of the fixed sleeve 606. A plurality of cleaning brushes 608 are fixedly installed in a circumferential array on the inner wall of the rotating sleeve 607. The cleaning brushes 608 are made of iron material and have good thermal conductivity. A flow space is formed between the outer wall of the rotating sleeve 607 and the inner wall of the fixed sleeve 606; The detection heating component 7 includes a second support frame 701 arranged between the cleaning and preheating component 6 and the guide seat 9. The second support frame 701 is composed of two long rods and a disc integrally formed at one end of the long rod. A plurality of rotating wheels 708 are rotatably installed in a circular array on the inner wall of the disc. A plurality of pairs of straight rods 704 are fixedly installed in a circular array on one side of the disc close to the guide seat 9. A rotating rod 705 is elastically rotatably installed between the straight rods 704. A vibration rod 710 is fixedly installed at one end of the rotating rod 705 close to the guide seat 9. The vibration rod A vibration detection element 713 is arranged above 710. When the steel pipe passes through the detection heating assembly 7, the rotating wheel 708 rotates with the pipe, and the magnetic suction piece 709 periodically absorbs / detaches to cause the rotating rod 705 to vibrate. The vibration rod 710 transmits the mechanical vibration to the piezoelectric vibration detection element 713. The vibration detection element 713 analyzes the difference in vibration frequency generated by steel pipes with different wall thicknesses, and the linkage controller dynamically adjusts the heating power, so that the thick-walled pipe obtains a higher heat input to penetrate the pipe wall, while avoiding overheating of the thin-walled pipe. The vibration detection element 713 The vibration is generated by the collision with the outer wall of the pipe fitting, and is combined with the real-time temperature data fed back by the temperature detection element to form a closed-loop control. The controller dynamically adjusts the heating power accordingly, so that the thick-walled pipe (low-frequency vibration) and the thin-walled pipe (high-frequency vibration) are matched with differentiated heating powers respectively. The vibration detection element 713 adopts the existing piezoelectric sensor for use. The piezoelectric sensor uses the piezoelectric effect to convert mechanical vibration into an electrical signal. When vibrated, the piezoelectric material will produce a voltage change, which can sense the frequency and intensity of the vibration. The vibration detection element 713 is electrically connected to the controller. A heating element 703 is provided on the side of the disc close to the guide seat 9. The heating element 703 adopts the existing electric induction heating device for use. The electric induction heating device is a device that uses the principle of electromagnetic induction to heat an object by generating eddy currents in a conductive object. Its working principle is based on Faraday's law of electromagnetic induction. An alternating current generates a changing magnetic field inside a conductor, thereby generating eddy currents inside the conductor. The flow of the eddy currents generates heat due to resistance, thereby heating the object. The heating element 703 is electrically connected to the controller. The temperature-lowering auxiliary thrust component 8 is used for auxiliary thrusting of the pipe fittings and cooling the pipe fittings.

[0022] Reference Figure 2A first fixing seat 601 is fixedly installed on the upper end surface of the base 1, and a first support frame 602 is fixedly installed on the side of the first fixing seat 601 close to the positioning clamping machine 2. One side of the first support frame 602 is fixedly connected to the fixing sleeve 606. A feeding hole is opened on one side of the first support frame 602, and a fixing plate 604 is fixedly installed on one side of the first support frame 602 and at the upper and lower ends of the feeding hole. A length measuring element 605 is embedded in the fixing plate 604. The length measuring element 605 is used with an existing inductive sensor, which is suitable for metal pipe fittings; the inductive sensor can accurately measure the moving distance or position of the pipe fitting by sensing the existence or proximity of the pipe fitting, thereby realizing length measurement.

[0023] Reference Figure 3 A cross bar 603 is fixedly installed on the upper end surface of the first support frame 602, an external sleeve 609 is fixedly installed on one end of the rotating sleeve 607, and a rotating driving member 610 is fixedly installed on one side of the cross bar 603. The rotating driving member 610 adopts an existing DC motor of model YX series. The output end of the rotating driving member 610 passes through the cross bar 603 and is fixedly installed with a transmission shaft 611. The transmission shaft 611 is rotatably connected to the cross bar 603, and the transmission shaft 611 and the external sleeve 609 are driven by a gear pair.

[0024] Reference Figures 4 to 6 , both ends of the second support frame 701 are fixedly connected to the first fixed seat 601, a top frame 706 is fixedly installed on the upper end surface of the straight rod 704, a first spring 707 is fixedly installed between the top frame 706 and the rotating rod 705, two magnetic suction plates 709 are fixedly installed on the opposite side of the rotating rod 705 and the rotating wheel 708, a first top block 711 is fixedly installed on the upper end surface of the vibration rod 710 and at the position corresponding to the vibration detection element 713, a plurality of straight plates 712 are fixedly installed in a circular array on one side of the disk, and the inner wall of one end of the straight plate 712 is fixedly connected to the vibration detection element 713, a U-shaped frame 702 is fixedly installed on one side of the first fixed seat 601, the U-shaped frame 702 is composed of two L-shaped rods and a ring integrally formed at the opposite end of the L-shaped rod, the inner wall of the ring is fixedly connected to the heating element 703, a connecting cover 714 is fixedly installed on one end of the heating element 703, and a temperature detection element is fixedly installed on the inner wall of the connecting cover 714, refer to Figure 6, a plurality of ventilation holes are arranged in a circumferential array inside the connecting cover 714. The heated air inside the heating element 703 can flow into the inside of the connecting cover 714 through the ventilation holes and then be transported to the circulation space through the connecting pipe 715. The set temperature detection element uses an existing thermocouple. The thermocouple is connected by two different metal materials to form a circuit; when the temperature of the contact point changes, a voltage will be generated between the metals, and the change in voltage has a certain relationship with the temperature change. The detection element is electrically connected to the controller. The outer wall of the connecting cover 714 is connected to a connecting pipe 715. One end of the connecting pipe 715 penetrates through the fixed sleeve 606 and is connected to the circulation space; a wind outlet barrel 716 is rotatably installed on the outer wall of the fixed sleeve 606. The wind outlet barrel 716 and the transmission shaft 611 are driven by a bevel gear pair 718. A cross bracket 717 is fixedly installed on the inner wall of the wind outlet barrel 716. A fan is fixedly installed on the lower end surface of the cross bracket 717. The transmission shaft 611 is connected to the wind outlet barrel 716 through the bevel gear pair 718 to convert the rotational motion into an axial air flow, so that the hot air of the heating element 703 is introduced into the circulation space of the fixed sleeve 606 through the connecting pipe 715.

[0025] Refer to Figures 7 to 9, the temperature reduction auxiliary pushing component 8 includes a second fixed seat 801 fixed on the upper end face of the base 1. A sliding box 802 is fixedly installed on the upper end face of the second fixed seat 801. A sliding rod 811 is fixedly installed on the inner wall of the sliding box 802. A slider is slidably installed on the outer wall of the sliding rod 811. A second spring 812 is fixedly installed between the slider and the sliding box 802. The slider is slidably connected to the inner wall of the sliding box 802. One end of the slider is fixedly installed with a support sliding rod 803. One end of the support sliding rod 803 is fixedly installed with a first chuck 804. The output end of the two-dimensional driving device 5 is fixedly installed with a second chuck 805. A plurality of flow channels 808 are linearly arrayed between the first chuck 804 and the second chuck 805. The first chuck 804 and the second chuck 805 are made of copper. Copper is a common material with a relatively high temperature transfer efficiency. When the cooled gas flows through the flow channels 808, it can quickly cool the pipe fittings by the first chuck 804 and the second chuck 805. The upper and lower ends of the second chuck 805 are fixedly installed with a first docking box 806. The first docking box 806 is communicated with the flow channels 808. Docking grooves 810 are opened on the upper and lower end faces of the first docking box 806. The upper and lower ends of the first chuck 804 are fixedly installed with a second docking box 807. The second docking box 807 is communicated with the flow channels 808. The upper and lower end faces of the second docking box 807 are communicated with a flow cover 809. The flow cover 809 is communicated with the flow channels 808. After the first chuck 804 and the second chuck 805 are docked and combined, the flow cover 809 can slide into the docking groove 810. After the gas flows into the flow cover 809, it can flow into the second docking box 807 respectively. When the first chuck 804 and the second chuck 805 are driven to move by the two-dimensional driving device 5, the support sliding rod 803 can slide on the inner wall of the sliding box 802 through the slider, compressing the second spring 812; Among them, an intake pipe 813 is communicated with the flow cover 809 at the upper position, and an outlet pipe 823 is communicated with the flow cover 809 at the lower position.

[0026] The inner wall of the air intake pipe 813 is fixedly installed with a solenoid valve, which is electrically connected to the controller. One end of the air intake pipe 813 is connected to the booster barrel 814. The inner wall of the booster barrel 814 is airtightly slidably installed with a piston plate 815. A second one-way valve 820 is embedded in the piston plate 815. A third spring 822 is fixedly installed between the piston plate 815 and the booster barrel 814. A connecting pipe 816 is rotatably installed on the side of the booster barrel 814 away from the air intake pipe 813. One end of the connecting pipe 816 passes through the booster barrel 814 and is fixed thereon. A rotating gear sleeve 819 is installed, and the rotating gear sleeve 819 is rotatably connected to the inner wall of the boost barrel 814. A plurality of slots are provided in a circumferential array on the outer wall of the rotating gear sleeve 819. A plurality of second top blocks 821 are fixedly installed in a circumferential array on one side of the piston plate 815 close to the rotating gear sleeve 819. The second top blocks 821 are slidably connected to the slots. A first non-return valve 818 is fixedly installed on the inner wall of the connecting pipe 816. The connecting pipe 816 and the transmission shaft 611 are driven by a gear pair. One end of the connecting pipe 816 is connected to a cooling device. A third one-way valve is fixedly installed on the inner wall of the outlet pipe 823, one end of the outlet pipe 823 is connected to the air bag 824, the outer wall of the air bag 824 is connected to the return pipe 825, the return pipe 825 is connected to the cooling device, the cooling device adopts an existing refrigerator, and is composed of two cooling chambers, one of which is connected to the connecting pipe 816 for transporting the refrigerated gas, and the other cooling chamber is connected to the return pipe 825 for cooling the refluxed gas.

[0027] The working principle of the present invention is as follows: By clamping the pipe fitting to be bent onto the positioning clamping machine 2, the positioning clamping machine 2 can drive the pipe fitting to move to the position of the guide seat 9, and the moving pipe fitting passes through the feed hole, the fixed sleeve 606, the external sleeve 609, the disc, the connecting cover 714 and the heating element 703 in sequence. During this process, the outer wall of the pipe fitting will fit the first clamping head 804 and the inner wall of the guide seat 9 respectively. When the pipe fitting passes through the feed hole, the length measuring element 605 will detect the moving length of the pipe fitting, so as to measure the moving pipe fitting to a suitable length for bending; 1. To clean the pipe fittings, the rotating drive member 610 is turned on to drive the transmission shaft 611 to rotate. The transmission shaft 611 drives the external sleeve 609 and the rotating sleeve 607 to rotate through the gear pair, so that the rotating sleeve 607 drives the cleaning brush 608 to rotate to clean the outer wall of the pipe fitting to prevent dirt from adhering to the outer wall of the pipe fitting; 2. Heating pipe fittings. During the process of the pipe fittings passing through the disc, the outer wall of the pipe fittings will contact each rotating wheel 708 and drive the rotating wheel 708 to rotate. The rotating rotating wheel 708 will drive the magnetizing piece 709 fixedly installed on the side to rotate. When the magnetizing piece 709 rotates to the magnetizing piece 709 provided on one side of the rotating rod 705, the two provided magnetizing pieces 709 will be magnetically adsorbed to drive one end of the rotating rod 705 to rotate upward and compress the first spring 707. After the rotating wheel 708 drives the magnetizing piece 709 to rotate and the two magnetically adsorbed magnetizing pieces 709 are separated from each other, the compressed first spring 707 will drive the rotating rod 705 to rotate downward, so that the lower end of the rotating rod 705 contacts the outer wall of the pipe fittings and generates an impact. The generated impact will cause the vibrating rod 710 to drive the first top block 711 to generate vibrations with different frequencies to impact the vibration detection element 713. The vibration detection element 713 generates corresponding electrical signals according to different vibration frequencies. The controller controls the voltage input to the heating element 703 through the generated electrical signals, so that the heating element 703 heats the pipe fittings; It should be noted that when the rotating rod 705 impacts different pipe fittings, the wall thickness of the pipe fittings will cause the rotating rod 705 to drive the vibrating rod 710 and the first top block 711 to generate vibrations with different frequencies. The controller will control the voltage input to the heating element 703 according to the vibrations with different frequencies detected by the vibration detection element 713, so that the heating element 703 generates corresponding temperatures to heat the pipe fittings. During the heating process of pipe fittings with different wall thicknesses, it can automatically detect and heat the pipe fittings. Especially for pipe fittings with different wall thicknesses, it can effectively detect and adjust to different heating powers to heat them. Through heating, the internal stress generated during the bending process of the pipe fittings can be alleviated, thereby reducing deformation and ensuring that the pipe fittings maintain the required shape and size. And heating the pipe fittings can reduce the hardness of the metal, making it softer, with better ductility and plasticity. In this way, the pipe fittings are not easy to break or have surface damage during bending, especially in the case of a large bending angle or a small bending radius; 3. Preheat the pipe fitting. During the process that the transmission shaft 611 is driven to rotate, the transmission shaft 611 drives the air outlet barrel 716 to rotate through the bevel gear pair 718. The rotating air outlet barrel 716 drives the fan to rotate through the cross bracket 717, so that the heated air inside the heating element 703 flows into the inside of the connecting cover 714, and then flows from the inside of the connecting cover 714 into the inside of the flow space through the connecting pipe 715, heating the rotating sleeve 607 and the cleaning brush 608. In this way, the pipe fitting can be preheated during the cleaning process of the cleaning brush 608. With the detection wall thickness cooperation of the temperature detection element and the vibration detection element 713, the heating temperature of the pipe fitting can be effectively adjusted, and the time and energy required for directly heating the pipe fitting can be reduced. Moreover, the heating can be made more uniform, avoiding local overheating or overcooling; 4. Cooling auxiliary pushing section. During the process that the existing pipe bender bends the pipe fitting, it is usually necessary to perform auxiliary pushing on the pipe fitting. This is because when the bending angle is large or the bending radius is small, the pipe fitting may require more external force to be pushed to ensure that the pipe fitting can smoothly pass through the pipe bending die. However, when the pipe fitting after instant heating is pushed by the second chuck 805, the part of the pipe fitting in contact with the second chuck 805 will also be heated due to the heating of the bent section of the pipe fitting, resulting in the temperature being transmitted to the auxiliary pushing section. In this way, the pipe fitting is easily deformed during auxiliary pushing, thus causing defective pipe fittings; During the rotation of the set transmission shaft 611 driven to rotate, the connecting pipe 816 is driven to rotate through the gear pair. The rotating connecting pipe 816 drives the rotating gear sleeve 819 to rotate, so that the clamping groove formed on the outer wall of the rotating gear sleeve 819 is in sliding contact with the second top block 821. When the end face of the rotating gear sleeve 819 contacts the second top block 821, the rotating gear sleeve 819 pushes the piston piece 815 to slide inside the pressure increasing barrel 814 and compress the third spring 822, causing the air pressure inside the pressure increasing barrel 814 to increase and the second one-way valve 820 to close. The air pressure between the piston piece 815 and the rotating gear sleeve 819 decreases and the first one-way valve 818 opens, and the cooled gas flows towards the space between the piston piece 815 and the rotating gear sleeve 819. When the inner wall of the clamping groove is in sliding contact with the second top block 821, the compressed third spring 822 pushes the piston piece 815 to reset, causing the air pressure inside the pressure increasing barrel 814 to decrease, the second one-way valve 820 to open, the air pressure between the piston piece 815 and the rotating gear sleeve 819 to increase, and the first one-way valve 818 to close. The cooled gas between the piston piece 815 and the rotating gear sleeve 819 flows into the pressure increasing barrel 814 through the second one-way valve 820. In this way, the cooled gas inside the cooling device is continuously pumped into the pressure increasing barrel 814. When the set length measuring element 605 detects that the pipe fitting has moved to the appropriate bending length, the controller controls the voltage input to the rotary drive member 610 to turn it off. At the same time, the two-dimensional drive device 5 and the linear drive device are turned on. The two-dimensional drive device 5 drives the second chuck 805 to correspond to the first chuck 804. The set flow hood 809 will slide and engage with the docking groove 810 at the upper and lower ends of the first docking box 806. The linear drive device drives the fixed clamping seat 4 to correspond to the guide seat 9. The base 1 controls the swing frame 3 to rotate, so that the fixed clamping seat 4 bends the pipe fitting. The two-dimensional drive device 5 simultaneously drives the second chuck 805 and the first chuck 804 to move to assist in pushing the pipe fitting; Before the auxiliary pushing, the controller controls the voltage input to the solenoid valve to open the solenoid valve. The cooling gas inside the pressurizing barrel 814 flows into the inside of the flow groove 808 through the intake pipe 813 and the flow cover 809 to cool the second chuck 805 and the first chuck 804, and cool the auxiliary pushing end of the pipe fitting, so as to avoid the deformation of the pipe fitting when the second chuck 805 and the first chuck 804 perform auxiliary pushing on the pipe fitting. After being cooled, the cooling gas flowing inside the flow groove 808 flows into the inside of the airbag 824 through the outlet pipe 823 and the third one-way valve. It should be noted that the gas entering the inside of the airbag 824 can be discharged to the outside or refluxed into the cooling device for reuse respectively according to the types of gases used. Some pipe fittings that require precision machining need some special gases for rapid cooling, such as nitrogen, carbon dioxide and other gases, which are used to rapidly cool the auxiliary pushing section of the pipe fitting. By connecting the reflux pipe 825 to the inside of the cooling device, the gas can be refluxed into the cooling device for repeated use. For some pipe fittings that require conventional bending, the auxiliary pushing section of the pipe fitting is cooled by the cooling air of the cooling device, and after being cooled, it can be directly discharged to the outside.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A bending device for steel pipe processing, characterized in that, Comprising: A base (1), on the upper end face of the base (1), a positioning and clamping machine (2) is fixedly installed. On one side of the base (1), a swing frame (3) is rotatably installed. On the outer wall of the swing frame (3) and at a position near the upper part, a guide seat (9) is fixedly installed. On the upper end face of the base (1) and at a position near the swing frame (3), a two-dimensional driving device (5) is fixedly installed. Inside the swing frame (3), a linear driving device is fixedly installed, and at the output end of the linear driving device, a fixed clamping seat (4) is fixedly installed; A cleaning and preheating assembly (6), the cleaning and preheating assembly (6) includes a fixed sleeve (606) arranged between the positioning and clamping machine (2) and the guide seat (9). Inside the inner wall of the fixed sleeve (606), a rotating sleeve (607) is rotatably installed. On the inner wall of the rotating sleeve (607), a plurality of cleaning brushes (608) are fixedly installed in a circumferential array. A flow space is formed between the outer wall of the rotating sleeve (607) and the inner wall of the fixed sleeve (606); A detection and heating assembly (7), the detection and heating assembly (7) includes a second support frame (701) arranged between the cleaning and preheating assembly (6) and the guide seat (9). The second support frame (701) is composed of two long rods and a disc integrally formed at the opposite ends of the long rods. On the inner wall of the disc, a plurality of rotating wheels (708) are rotatably installed in a circumferential array. On one side of the disc near the guide seat (9), a plurality of pairs of straight rods (704) are fixedly installed in a circumferential array. Between the straight rods (704), a rotating rod (705) is elastically rotatably installed. At the end of the rotating rod (705) near the guide seat (9), a vibrating rod (710) is fixedly installed. Above the vibrating rod (710), a vibration detection element (713) is arranged. The vibration detection element (713) is electrically connected to a controller. On one side of the disc near the guide seat (9), a heating element (703) is arranged. The heating element (703) is electrically connected to the controller; A temperature reduction and auxiliary pushing assembly (8), the temperature reduction and auxiliary pushing assembly (8) is used for auxiliary pushing and cooling of pipe fittings.

2. The bending device for steel pipe processing according to claim 1, characterized in that, On the upper end face of the base (1), a first fixed seat (601) is fixedly installed. On one side of the first fixed seat (601) near the positioning and clamping machine (2), a first support frame (602) is fixedly installed. One side of the first support frame (602) is fixedly connected to the fixed sleeve (606). On one side of the first support frame (602), a feed hole is opened. On one side of the first support frame (602) and at the upper and lower ends of the feed hole, fixed pieces (604) are fixedly installed. Inside the fixed pieces (604), a length measuring element (605) is embedded.

3. A bending device for steel pipe processing according to claim 2, characterized in that, The upper end surface of the first support frame (602) is fixedly installed with a cross bar (603). One end of the rotating sleeve (607) is fixedly installed with an external sleeve (609). One side of the cross bar (603) is fixedly installed with a rotation driving member (610). The output end of the rotation driving member (610) penetrates through the cross bar (603) and is fixedly installed with a transmission shaft (611). The transmission shaft (611) is rotatably connected to the cross bar (603). The transmission shaft (611) and the external sleeve (609) are driven by a gear pair.

4. A bending device for steel pipe processing according to claim 3, characterized in that, Both ends of the second support frame (701) are fixedly connected to the first fixed seat (601). The upper end surface of the straight rod (704) is fixedly installed with a top frame (706). A first spring (707) is fixedly installed between the top frame (706) and the rotating rod (705). Two magnetic attraction pieces (709) are respectively fixedly installed on the opposite sides of the rotating rod (705) and the rotating wheel (708). A first top block (711) is fixedly installed on the upper end surface of the vibrating rod (710) at a position corresponding to the vibration detection element (713). A plurality of straight plates (712) are fixedly installed on the circumference of one side of the disc. One end inner wall of the straight plate (712) is fixedly connected to the vibration detection element (713).

5. A bending device for steel pipe processing according to claim 4, characterized in that, One side of the first fixed seat (601) is fixedly installed with a U-shaped frame (702). The U-shaped frame (702) is composed of two L-shaped rods and a collar integrally formed at the opposite ends of the L-shaped rods. The inner wall of the collar is fixedly connected to the heating element (703). One end of the heating element (703) is fixedly installed with a communicating cover (714). A temperature detection element is fixedly installed on the inner wall of the communicating cover (714). The detection element is electrically connected to the controller.

6. A bending device for steel pipe processing according to claim 5, characterized in that, A communicating pipe (715) is communicated with the outer wall of the communicating cover (714). One end of the communicating pipe (715) penetrates through the fixed sleeve (606) and is communicated with the circulation space. An air outlet barrel (716) is rotatably installed on the outer wall of the fixed sleeve (606). The air outlet barrel (716) and the transmission shaft (611) are driven by a bevel gear pair (718). A cross-shaped bracket (717) is fixedly installed on the inner wall of the air outlet barrel (716). A fan is fixedly installed on the lower end surface of the cross-shaped bracket (717).

7. A bending device for steel pipe processing according to claim 3, characterized in that, The temperature-lowering auxiliary pushing component (8) includes a second fixed seat (801) fixed to the upper end surface of the base (1). A sliding box (802) is fixedly installed on the upper end surface of the second fixed seat (801). A sliding rod (811) is fixedly installed on the inner wall of the sliding box (802). A slider is slidably installed on the outer wall of the sliding rod (811). A second spring (812) is fixedly installed between the slider and the sliding box (802). The slider is slidably connected to the inner wall of the sliding box (802). One end of the slider is fixedly installed with a support sliding rod (803). One end of the support sliding rod (803) is fixedly installed with a first chuck (804). A second chuck (805) is fixedly installed at the output end of the two-dimensional driving device (5). A plurality of flow channels (808) are linearly arrayed between the first chuck (804) and the second chuck (805).

8. A bending device for steel pipe processing according to claim 7, characterized in that, First docking boxes (806) are fixedly installed at the upper and lower ends of the second chuck (805). The first docking boxes (806) communicate with the flow channels (808). Docking grooves (810) are formed in the upper and lower end faces of the first docking boxes (806). Second docking boxes (807) are fixedly installed at the upper and lower ends of the first chuck (804). The second docking boxes (807) communicate with the flow channels (808). Flow covers (809) communicate with the upper and lower end faces of the second docking boxes (807). The flow covers (809) communicate with the flow channels (808). Among them, an intake pipe (813) communicates with the flow cover (809) at the upper position, and an exhaust pipe (823) communicates with the flow cover (809) at the lower position.

9. The bending device for steel pipe processing according to claim 8, characterized in that, An electromagnetic valve is fixedly installed on the inner wall of the intake pipe (813). The electromagnetic valve is electrically connected to the controller. One end of the intake pipe (813) communicates with a pressurizing barrel (814). A piston piece (815) is hermetically slidably installed on the inner wall of the pressurizing barrel (814). A second one-way valve (820) is embedded in the piston piece (815). A third spring (822) is fixedly installed between the piston piece (815) and the pressurizing barrel (814). A connecting pipe (816) is rotatably installed on one side of the pressurizing barrel (814) away from the intake pipe (813). One end of the connecting pipe (816) penetrates through the pressurizing barrel (814) and is fixedly installed with a rotating gear sleeve (819). The rotating gear sleeve (819) is rotatably connected to the inner wall of the pressurizing barrel (814). A plurality of card slots are circumferentially arrayed on the outer wall of the rotating gear sleeve (819). A plurality of second top blocks (821) are circumferentially arrayed and fixedly installed on the side of the piston piece (815) close to the rotating gear sleeve (819). The second top blocks (821) are slidably connected to the card slots. A first one-way valve (818) is fixedly installed on the inner wall of the connecting pipe (816). The connecting pipe (816) and the transmission shaft (611) are driven by a gear pair. One end of the connecting pipe (816) is connected to a cooling device. A third one-way valve is fixedly installed on the inner wall of the air outlet pipe (823). One end of the air outlet pipe (823) is communicated with an airbag (824). The outer wall of the airbag (824) is communicated with a return pipe (825), and the return pipe (825) is communicated with the cooling device.

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