Cutting apparatus for polyurethane foam truing and method of use

Abstract

The present application belongs to the field of aircraft fuel system processing, and relates to a cutting device for polyurethane foam shaping and a use method thereof. The cutting device is used for cutting polyurethane foam by using the shape of a nichrome wire model at high temperature. The nichrome wire model with different shapes is placed in a main body, is lifted to slide along a sliding groove at the top of the main body to one side of the main body, and is rotated to be horizontally placed by a motor. A motor is arranged at the lower part of the side of the main body, and an operation table parallel to the nichrome wire model is fixed above the output shaft of the motor. The polyurethane foam is placed on the operation table, and is controlled to move upwards until the polyurethane foam is attached to the nichrome wire model, so that the cutting of the polyurethane foam is completed. The cutting device uses the nichrome wire model to replace a cutter, can realize one-piece shaping, has a smooth cutting surface, and can prevent the generation of excess scraps by using the electric heating mode, so as to avoid the hidden danger of excess substances. The cutting efficiency and cutting quality of the cutting device are greatly improved, and great convenience is brought to the later inspection.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aircraft fuel system processing, and relates to a cutting device for polyurethane foam shaping and a use method thereof, in particular to an integrated forming cutting device for polyurethane foam in an aircraft fuel system and a use method thereof, a cutting device for polyurethane foam shaping, which can complete cutting of polyurethane foam according to design requirements, ensure that the shape of the polyurethane foam meets the design requirements, and effectively prevent fuel from moving in the fuel system after installation, thereby preventing the temperature of the fuel from rising. BACKGROUND

[0002] During flight, the aircraft needs to keep the fuel in the fuel tank stable. Generally, polyurethane foam is installed in the fuel tank to prevent fuel from moving and causing the temperature of the fuel to rise, reduce local fuel shortage and static friction caused by aircraft turning or other actions, and effectively absorb ignition energy and inhibit the spread of flame peaks as a three-dimensional fireproof shield to prevent fire and avoid serious safety hazards. In addition, polyurethane foam is also installed in the fuel tank to prevent the movement of residual impurities in the fuel tank, which may cause blockage of the servo valve or fuel pump and result in insufficient fuel supply, thereby avoiding serious safety hazards. Based on the above reasons, as a weak link in the fuel tank system, it is necessary to install honeycomb-shaped polyurethane foam in the fuel tank after cleaning to ensure safety.

[0003] At present, the honeycomb-shaped polyurethane foam in the aircraft fuel system needs to be manually cut according to design requirements before cleaning. Manual cutting has the following two problems. First, the cutting process cannot be completed at one time, and foam debris may be attached to the cutting mark, which may easily fall off after being washed and collided by the fuel in the fuel tank, thereby increasing the risk of excess material in the fuel system. Second, the polyurethane foam is relatively soft, and manual cutting may cause large cutting errors due to deformation of the foam, resulting in low installation precision, stress contact with functional accessories in the fuel tank, and affecting the function of the functional accessories in the fuel tank. Therefore, a new cutting device for honeycomb-shaped polyurethane foam shaping is needed to compensate for the shortcomings of the existing technology, realize integrated forming processing of honeycomb-shaped polyurethane foam, and improve the shape precision of the polyurethane foam and avoid the generation of excess material. SUMMARY

[0004] To solve the above problems in the prior art, the present application provides a cutting device for polyurethane foam shaping and a use method thereof, which realizes integrated forming processing of polyurethane foam.

[0005] The technical problems solved by the present application are realized by the following technical solutions:

[0006] The utility model provides a kind of polyurethane foam shaping cutting device, using following scheme to meet the use requirement, one is to use telescopic operation platform electric telescopic to replace manual operation and realize the movement cutting of polyurethane foam, cutting state is stable, can prevent polyurethane foam surface uneven and avoid the risk of generating excess slag excess;Two is to use nichrome wire model to replace manual cutting, can realize the integrated forming of polyurethane foam without miscellaneous cutting, after cutting, appearance is consistent with the appearance of nichrome wire model, and hot working surface state is good, without excess dander, eliminate the problem of excess caused by polyurethane foam.

[0007] The cutting device includes a telescopic lifting part, a rotating operation part and a machine body supporting part.

[0008] The machine body supporting part is used to support the polyurethane foam shaping cutting device, increase support stability and reliability, and includes a main machine body 1, a power box 2, a power supply interface 6 and a moving wheel 21. The main machine body 1 is a bearing mechanism, which is an open box structure with an upper part. A plurality of vertical clamping grooves are arranged inside the box structure to store the nichrome wire models 15 of the rotating operation part. The nichrome wire models 15 have different shapes and are vertically placed in the clamping grooves inside the main machine body 1. Sliding grooves are arranged on both sides of the main machine body 1 along the arrangement direction of the clamping grooves. The main machine body 1 supports the remaining components in addition to the nichrome wire models 15. A platform is arranged on the bottom of the outer wall of one side of the main machine body 1 along the extension direction of the sliding grooves. The moving wheel 21 is a moving component, which is installed at the lower end of the four corners of the main machine body 1 to support and move the main machine body 1. The moving wheel 21 is provided with a brake device. After the cutting device is moved to a designated position by the moving wheel 21, the brake device is operated to fix the main machine body 1. The power box 2 is an electric component, which is fixed outside the main machine body 1. The power box 2 is provided with a rotating switch 3, a heating switch 4 and a lifting switch 5 of the telescopic lifting part outside, and a controller 20 of the rotating operation part inside. The power supply interface 6 is fixedly arranged outside the main machine body 1 to supply power.

[0009] The rotating operation part includes a rotating switch 3, a heating switch 4, a heat-sensitive block 7, a wire 8, a nichrome wire model 15, a adapter body 16, a bearing 17, a rotating shaft 18, a rotating motor 19 and a controller 20. The rotating switch 3 and the heating switch 4 are arranged outside the power box 2 to control the rotating motor 19 and the heat-sensitive block 7, respectively. The controller 20 is a control component, which is arranged inside the power box 2 to issue control instructions for the rotating switch 3, the heating switch 4 and the lifting switch 5 of the telescopic lifting part and distribute corresponding actions. The nichrome wire model 15 is a direct operation component, which is arranged in the main machine body 1 and is used to cut the polyurethane foam. Figure 2As shown, it comprises a working frame and a support rod connected, the working frame is made of different shapes according to the needs of multiple, using its shape and by heating to complete the cutting of polyurethane foam, the support rod of nichrome wire model 15 is parallel to the working frame, the support rod is provided with L-shaped block structure at both ends, used for guiding the movement of nichrome wire model 15 in the clamping groove inside the main body 1 and the sliding groove at the top, the working frame of nichrome wire model 15 is placed in the clamping groove inside the main body 1 on one side upward; The adapter 16 is provided with two, symmetrically arranged on the inner wall of the two sides of the main body 1 near the platform end and rotatably connected with the main body 1, which is located below the sliding groove, wherein, one side of the adapter 16 is rotatably connected with one end of the shaft 18 through the bearing 17, and the bearing 17 is connected with both of them by interference, the other end of the shaft 18 is fixedly connected with the main body 1, the other side of the adapter 16 is interference connected with one end of the other shaft 18, the other end of the shaft 18 passes through the side wall of the main body 1 and cooperates with the output end of the rotating motor 19, the rotating motor 19 is fixedly installed on the outer wall of the main body 1 at the corresponding position, controlled by the rotating switch 3, used for driving the adapter 16 to rotate through the shaft 18, both adapters 16 are provided with grooves, the groove profile corresponds to the L-shaped block structure at both ends of the support rod of nichrome wire model 15, used for limiting the nichrome wire model 15 in the two adapters 16, so that the nichrome wire model 15 can rotate with the adapter 16; When working, pull up the required nichrome wire model 15 to the top end of the main body 1, move along the sliding groove at the top end of the main body 1 to the groove of the adapter 16, control the rotating motor 19 through the rotating switch 3, drive the shaft 18 and the adapter 16 on the same side to rotate, the other side of the adapter 16 rotates synchronously, and then the rotation of the nichrome wire model 15 is realized, the rotating motor 19 is locked after driving the rotation operation to prevent the nichrome wire model 15 from moving, at this time, the nichrome wire model 15 is located above the platform of the main body 1 and parallel to the platform; The heat sensitive block 7 is an electric heat conduction structure, which is arranged on the adapter 16 on one side of the rotating motor 19, which is connected with the heating switch 4 through the wire 8, used for realizing electric heating transmission, when the nichrome wire model 15 moves to the groove of the adapter 16, the heat sensitive block 7 is attached to the nichrome wire model 15, and the cutting of polyurethane foam is completed after the temperature of the nichrome wire model 15 is enough to complete the cutting work through electric heating.

[0010] The telescopic lifting part is used for automatic lifting cutting of polyurethane foam, comprising a lifting switch 5, a wire 8, a tightening screw 9, a motor control module 10, an electric telescopic rod 11, a motor 12, a supporting base 13 and an operation table 14. The supporting base 13 is fixedly installed on the platform of the main body 1 through the tightening screw 9, and is used for supporting the electric telescopic rod 11, the motor 12 and the operation table 14, thereby increasing the stability and reliability of the support. The motor 12 is a power output component, which is fixedly installed on the supporting base 13. The electric telescopic rod 11 is a lifting execution component of the motor 12, and the top of the electric telescopic rod 11 is fixedly connected with the operation table 14. The motor 12 drives the electric telescopic rod 11 to extend or retract, thereby driving the operation table 14 to lift or lower. The operation table 14 is a direct operation component, which is horizontally placed and cooperates with the sidewall of the main body 1 on the same side, thereby limiting the alignment of the side edge of the polyurethane foam and the side edge of the nichrome wire model 15 on the same side, preventing the polyurethane foam from moving and causing quality problems. When the operation table 14 is lifted to the highest position, the upper surface of the operation table 14 is closely attached to the nichrome wire model 15, thereby preventing the existence of gaps and making the cutting not in place, so that the final cutting cannot be completed, ensuring that the polyurethane foam is completely cut, and avoiding secondary cutting. The motor control module 10 is fixedly connected beside the control motor 12, and is connected with the lifting switch 5 through another wire 8. The lifting switch 5 arranged outside the power box 2 controls the lifting operation instruction. The motor control module 10 receives the instruction and drives the control motor 12 to drive the electric telescopic rod 11 to complete the lifting operation.

[0011] Further, the main body 1 is internally provided with 11 clamping grooves.

[0012] Further, the nichrome wire models 15 of different shapes are numbered and used according to the number.

[0013] A use method of the cutting device for polyurethane foam shaping, the use method comprising the following steps:

[0014] Step one: open the brake device of the moving wheel 21, move the cutting device to the specified position, complete positioning, and fix the brake device of the moving wheel 21;

[0015] Step two: check whether the appearance of the cutting device is intact, whether the inspection label is within the inspection period, and whether the functions of the buttons meet the requirements;

[0016] Step three: place the polyurethane foam to be processed above the operation table 14 and close to the sidewall of the main body 1 to realize positioning, in a state to be processed;

[0017] Step four: select the suitable nichrome wire model 15 in the main body 1, lift the selected nichrome wire model 15, move it to the side of the platform along the upper sliding groove of the main body 1, and until the end of the nichrome wire model 15 is clamped into the adapter body 16, to complete the selection of the nichrome wire model 15.

[0018] Step five: press the rotating switch 3, control the adapter 16 to rotate, until the nichrome wire model 15 on the adapter 16 is horizontally placed, at this time the heat-sensitive block 7 and the nichrome wire model 15 are completely in contact;

[0019] Step six: press the heating switch 4, wait for the temperature of the nichrome wire model 15 to rise, and wait for the temperature to rise high enough to complete the heating step;

[0020] Step seven: press the lifting switch 5, the electric extension rod 11 is extended, drives the operation table 14 to move upwards, checks the state of the polyurethane foam, prevents the polyurethane foam from being displaced to cause material waste, until the operation table 14 is completely in contact with the nichrome wire model 15, at this time the polyurethane foam is cut after the shape is corrected;

[0021] Step eight: press the heating switch 4 to stop heating, take out the polyurethane foam, press the rotating switch 3 to control the adapter 16 to rotate to the original position, after the chrome wire model 15 is cooled, it is placed back into the main body 1 along the original path, press the lifting switch 5 to control the electric extension rod 11 to shorten, and the operation table 14 returns to the original position;

[0022] Step nine: move the cutting device to the designated storage position, and lock the moving wheel 21 to prevent movement;

[0023] Step ten: check the polyurethane foam after cutting, the appearance is perfect without burrs, and the shape meets the requirements.

[0024] The beneficial effects of the present application are:

[0025] The existing polyurethane foam shape correction cutting method completes the cutting of the polyurethane foam shape correction by means of a cutter, and the cutting surface is uneven after cutting, and there are excess burrs; the polyurethane foam with uneven cutting surface installed in the fuel tank may be stressed due to the non-conformity of the shape, thereby causing stress contact of the servo valve or functional accessories, and generating a safety hazard to fuel supply, and the existence of excess burrs can pollute the fuel system, block the servo valve and fuel pump, and generate a serious safety hazard to fuel supply.

[0026] The lifting device is used instead of manual operation in the present application, the influence of human factors is avoided, and the unevenness of the cutting surface after cutting is prevented; the nichrome wire model after shape correction is used instead of the cutter for cutting, the integrally formed polyurethane shape correction foam can be realized, the cutting surface is flat, and the electric heating method is used for cutting to prevent the generation of excess burrs, thereby avoiding the excess hazards caused by polyurethane foam; the cutting efficiency and cutting quality are greatly improved, and great convenience is brought to the later inspection.

[0027] The polyurethane foam shaping cutting device has the characteristics of simple structure, small occupation, convenient operation and strong maintainability, the movement of the polyurethane foam is limited by the structure of the body, positioning is more reliable, the nichrome wire model is placed in the body and cannot be taken out alone, so that the nichrome wire model is prevented from being lost, and the placement in the body facilitates the taking, placing and use of the nichrome wire model. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a polyurethane foam shaping cutting device isometric view;

[0029] Figure 2 is a nichrome wire model isometric view.

[0030] In the figure: 1-main body; 2-power box; 3-rotation switch; 4-heating switch; 5-lifting switch; 6-power interface; 7-thermal block; 8-wire; 9-tightening screw; 10-motor control module; 11-electric extension rod; 12-motor; 13-supporting base; 14-operation table; 15-nichrome wire model; 16-adaptor; 17-bearing; 18-rotation shaft; 19-rotation motor; 20-controller; 21-moving wheel. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be described in detail below with reference to the drawings.

[0032] A polyurethane foam shaping cutting device, comprising a telescopic lifting part, a rotating operation part and a body supporting part, as shown in Figure 1 .

[0033] The body supporting part is used to support the polyurethane foam shaping cutting device, increase the stability and reliability of the support, comprising a main body 1, a power box 2, a power interface 6 and a moving wheel 21. The main body 1 is a bearing mechanism, which is an open-top box structure, 11 vertical clamping grooves are arranged inside the box structure for storing different shapes of nichrome wire models 15, two sides of the main body 1 along the clamping groove arrangement direction are respectively provided with sliding grooves, the main body 1 supports the nichrome wire models 15 and other components, a plate structure is arranged at the bottom of the outer wall of one side of the main body 1 along the extension direction of the sliding groove, forming a platform; the moving wheel 21 is a moving component, which is installed at the lower end of the four corners of the main body 1, used for supporting and moving the main body 1, provided with a brake device, after the cutting device is moved to the designated position by the moving wheel 21, the brake device is operated to fix the main body 1; the power box 2 is an electric component, fixed outside the main body 1, provided with a rotation switch 3, a heating switch 4 of the rotating operation part and a lifting switch 5 of the telescopic lifting part outside, and provided with a controller 20 of the rotating operation part inside; the power interface 6 is fixedly arranged outside the main body 1 and used for power supply.

[0034] The rotating operation part includes rotating switch 3, heating switch 4, heat-sensitive block 7, wire 8, nichrome wire model 15, adapter body 16, bearing 17, rotating shaft 18, rotating motor 19 and controller 20. The rotating switch 3 and heating switch 4 are arranged outside the power supply box 2, and are used to control the rotating motor 19 and heat-sensitive block 7 respectively; the controller 20 is a control component arranged inside the power supply box 2, and is used to issue control instructions for the rotating switch 3, heating switch 4 and lifting switch 5 of the telescopic lifting part and distribute corresponding actions; the nichrome wire model 15 is a direct operation component, as shown in Figure 2 the figure, which includes a working frame and a support rod connected together, the working frame is made in different shapes according to requirements, 11 different shapes are numbered for easy selection, the shape is used to complete the cutting of polyurethane foam by heating, the support rod of the nichrome wire model 15 is parallel to the working frame, L-shaped block structure is arranged at both ends of the support rod, which is used to guide the movement of the nichrome wire model 15 in the clamping groove inside the main body 1 and the sliding groove at the top, the working frame of the nichrome wire model 15 is placed in the clamping groove inside the main body 1 on one side upward; the adapter body 16 is provided with two, which are symmetrically arranged on the inner walls of both sides of the main body 1 near one end of the platform and below the sliding groove, one side of the adapter body 16 is rotatably connected with one end of the rotating shaft 18 through the bearing 17, and the bearing 17 is interference connected with both of them, the other end of the rotating shaft 18 is fixedly connected with the main body 1, the other side of the adapter body 16 is interference connected with one end of the other rotating shaft 18, the other end of the rotating shaft 18 passes through the side wall of the main body 1 and is matched with the output end of the rotating motor 19, the rotating motor 19 is fixedly installed on the outer wall of the main body 1 at the corresponding position and is controlled by the rotating switch 3, which is used to drive the adapter body 16 to rotate through the rotating shaft 18, both of the adapter bodies 16 are provided with grooves, the groove profile corresponds to the L-shaped block structure at both ends of the support rod of the nichrome wire model 15, which is used to limit the nichrome wire model 15 in the two adapter bodies 16, so that the nichrome wire model 15 can rotate with the adapter body 16; during work, the required nichrome wire model 15 is pulled to the top end of the main body 1 and moved to the groove of the adapter body 16 along the sliding groove at the top end of the main body 1, the rotating motor 19 is controlled by the rotating switch 3, the rotating shaft 18 and the adapter body 16 on the same side are driven to rotate, the adapter body 16 on the other side is synchronously rotated, and then the rotation of the nichrome wire model 15 is realized, the rotating motor 19 is locked after driving the rotation operation to prevent the nichrome wire model 15 from moving, at this time, the nichrome wire model 15 is located above the platform of the main body 1 and is parallel to the platform; the heat-sensitive block 7 is an electric heat conduction structure, which is arranged on the adapter body 16 on one side of the rotating motor 19, and is connected with the heating switch 4 through the wire 8, which is used to realize electric heat transmission, when the nichrome wire model 15 moves to the groove of the adapter body 16, the heat-sensitive block 7 is attached to the nichrome wire model 15, and after heating by electricity, the heat is transmitted to the nichrome wire model 15 to complete the cutting after reaching a temperature sufficient to complete the cutting of polyurethane foam.

[0035] The telescopic lifting part is used for automatic lifting cutting of polyurethane foam, comprising a lifting switch 5, a wire 8, a tightening screw 9, a motor control module 10, an electric telescopic rod 11, a motor 12, a supporting base 13 and an operation table 14. The supporting base 13 is fixedly installed on the platform of the main body 1 through the tightening screw 9, and is used for supporting the electric telescopic rod 11, the motor 12 and the operation table 14, thereby increasing the stability and reliability of the support. The motor 12 is a power output component, which is fixedly installed on the supporting base 13. The electric telescopic rod 11 is a lifting execution component of the motor 12, and the top of the electric telescopic rod 11 is fixedly connected with the operation table 14. The motor 12 drives the electric telescopic rod 11 to extend or retract, thereby driving the operation table 14 to lift or lower. The operation table 14 is a direct operation component, which is horizontally placed and cooperates with the sidewall of the main body 1 on the same side, thereby limiting the alignment of the side edge of the polyurethane foam with the side edge of the nichrome wire model 15 on the same side, preventing the polyurethane foam from moving and causing quality problems. When the operation table 14 is lifted to the highest position, the upper surface of the operation table 14 is closely attached to the nichrome wire model 15, thereby preventing the existence of gaps and making the cutting not in place, so that the final cutting cannot be completed, ensuring that the polyurethane foam is completely cut, and avoiding secondary cutting. The motor control module 10 is fixedly connected beside the control motor 12, and is connected with the lifting switch 5 through another wire 8. The lifting switch 5 arranged outside the power box 2 controls the lifting operation instruction. The motor control module 10 receives the instruction and drives the control motor 12 to drive the electric telescopic rod 11 to complete the lifting operation.

[0036] A use method of a polyurethane foam shaping cutting device, the use method comprising the following steps:

[0037] Step one: open the brake device of the moving wheel 21, move the cutting device to the designated position, complete the positioning of the device, and operate the brake device of the moving wheel 21 to fix;

[0038] Step two: check whether the appearance of the cutting device is intact, whether the inspection label is within the inspection period, and whether the functions of each button meet the requirements;

[0039] Step three: place the polyurethane foam to be processed above the operation table 14 and close to the sidewall of the main body 1 to realize positioning, in a state to be processed;

[0040] Step four: select the suitable nichrome wire model 15 in the main body 1, lift the selected nichrome wire model 15, move it to the side of the platform along the upper sliding groove of the main body 1, and until the end of the nichrome wire model 15 is clamped into the adapter body 16, to complete the selection of the nichrome wire model 15;

[0041] Step five: press the rotating switch 3 to control the adapter 16 to rotate until the nichrome wire model 15 on the adapter 16 is horizontally placed, at this time the heat-sensitive block 7 and the nichrome wire model 15 are completely in contact;

[0042] Step six: press the heating switch 4 to wait for the temperature of the nichrome wire model 15 to rise, and wait until the temperature is high enough to complete the heating step;

[0043] Step seven: press the lifting switch 5 to extend the electric extension rod 11 to drive the operation table 14 to move upwards to check the state of the polyurethane foam, prevent the polyurethane foam from being displaced to cause material waste, and until the operation table 14 is completely in contact with the nichrome wire model 15, at this time the polyurethane foam is shaped and cut;

[0044] Step eight: press the heating switch 4 to stop heating, remove the polyurethane foam, press the rotating switch 3 to control the adapter 16 to rotate to the original position, and after the nichrome wire model 15 is cooled, it is placed back into the main body 1 along the original path, and the electric extension rod 11 is shortened by pressing the lifting switch 5, and the operation table 14 returns to the original position;

[0045] Step nine: move the cutting device to the designated storage position and lock the moving wheel 21 to prevent movement;

[0046] Step ten: check the polyurethane foam after cutting, which is intact without burrs and meets the requirements.

[0047] The above-described embodiments only express the implementation of the present application, but cannot be interpreted as a limitation on the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application.

Claims

1. A cutting device for polyurethane foam truing, characterized by, The cutting device comprises a telescopic lifting part, a rotating working part and a machine body supporting part; The machine body supporting part comprises a main machine body (1), a power supply box (2) and a power supply interface (6); the main machine body (1) is an open-top box structure, a plurality of vertical clamping grooves are arranged inside the box structure, sliding grooves are arranged on both sides of the main machine body (1) along the arrangement direction of the clamping grooves, and a platform is arranged on the bottom of the outer wall of the main machine body (1) along the extension direction of the sliding grooves; the power supply box (2) and the power supply interface (6) are fixedly arranged on the outer side of the main machine body (1); The rotating working part comprises a rotating switch (3), a heating switch (4), a heat-sensitive block (7), a wire (8), a nichrome wire model (15), an adapter body (16), a bearing (17), a rotating shaft (18), a rotating motor (19) and a controller (20); the rotating switch (3) and the heating switch (4) are arranged outside the power supply box (2) and are used for controlling the rotating motor (19) and the heat-sensitive block (7) respectively; the controller (20) is arranged inside the power supply box (2) and is used for issuing control instructions for the rotating switch (3), the heating switch (4) and the lifting switch (5) of the telescopic lifting part and distributing corresponding actions; the nichrome wire model (15) comprises a working frame and a supporting rod which are connected with each other, a plurality of working frames with different shapes are prepared according to requirements, the nichrome wire model (15) is used for cutting polyurethane foam by heating according to the shape, the supporting rod of the nichrome wire model (15) is parallel to the working frame, L-shaped block structures are arranged at both ends of the supporting rod and are used for guiding the nichrome wire model (15) to move in the clamping grooves inside the main machine body (1) and the sliding grooves on the top, and the nichrome wire model (15) is placed in the clamping grooves inside the main machine body (1); the adapter body (16) is arranged on the inner walls of both sides of the main machine body (1) near one end of the platform and is rotatably connected with the main machine body (1), and the adapter body (16) is located below the sliding grooves, the two adapter bodies (16) are provided with grooves, the groove profiles correspond to the L-shaped block structures at both ends of the supporting rod of the nichrome wire model (15), the nichrome wire model (15) is limited in the two adapter bodies (16), and the nichrome wire model (15) can be placed horizontally by rotating the adapter bodies (16); the rotating motor (19) is installed on the outer wall of the main machine body (1) at a position corresponding to one side of the adapter body (16) and controls the rotation of the adapter body (16) on this side, the rotating motor (19) is controlled by the rotating switch (3) and is used for driving the adapter body (16) to rotate through the rotating shaft (18); the heat-sensitive block (7) is arranged on the adapter body (16) on one side of the rotating motor (19) and is connected with the heating switch (4) through the wire (8) and is used for realizing electric heating transmission, the heat-sensitive block (7) is attached to the nichrome wire model (15) after the nichrome wire model (15) moves into the groove of the adapter body (16), and the nichrome wire model (15) is heated and transmitted to the nichrome wire model (15). The telescopic lifting mechanism includes a lifting switch (5), a wire (8), a motor control module (10), an electric extension rod (11), a motor (12), a support base (13), and an operating table (14). The support base (13) is fixedly installed on the platform of the main body (1). The motor (12) is fixedly installed on the support base (13). The electric extension rod (11) serves as the lifting actuator of the motor (12), and the operating table (14) is fixedly connected to its top. The motor (12) drives the electric extension rod (11) to extend and retract, thereby raising and lowering the operating table (14). The operating platform (14) is placed horizontally and cooperates with the side wall of the main body (1) on the same side to restrict the side of the polyurethane foam from aligning with the side of the nickel-chromium wire model (15) on the same side. When the operating platform (14) is raised to the highest position, its upper surface is tightly fitted with the nickel-chromium wire model (15) to ensure that the polyurethane foam is completely cut. The motor control module (10) is fixedly connected to the control motor (12) and is connected to the lifting switch (5) through another wire (8). The lifting switch (5) controls and drives the control motor (12) to drive the electric extension rod (11) to complete the lifting action.

2. A cutting device for polyurethane foam shape correction according to claim 1, characterized in that, The main body (1) is equipped with four casters (21) at the lower corners, which are equipped with brakes for supporting and moving the main body (1).

3. A cutting device for polyurethane foam shape correction according to claim 1, characterized in that, Of the two adapter bodies (16), one adapter body (16) is rotatably connected to one end of the rotating shaft (18) through a bearing (17), and the bearing (17) is interference-fitted to both. The other end of the rotating shaft (18) is fixedly connected to the main body (1). The other adapter body (16) is interference-fitted to one end of the other rotating shaft (18). The other end of the rotating shaft (18) passes through the side wall of the main body (1) and engages with the output end of the rotating motor (19). The rotating motor (19) is fixedly installed on the outer wall of the main body (1) on that side.

4. A cutting device for polyurethane foam shape correction according to claim 1, characterized in that, The support base (13) is fixedly installed on the platform of the main body (1) by tightening screws (9).

5. A method of using a cutting device for shaping polyurethane foam according to any one of claims 1-4, characterized in that, The method of use includes the following steps: Step 1: Move the cutting device to the designated position and complete the positioning and fixation; Step 2: Check and confirm that the cutting device is functioning properly; Step 3: Place the polyurethane foam to be processed above the operating table (14) and position it close to the side wall of the main body (1); Step 4: Select a suitable nickel-chromium wire model (15) inside the main body (1), lift it up, and move it along the upper sliding groove of the main body (1) to one side of the platform until the end of the nickel-chromium wire model (15) is inserted into the adapter (16). Step 5: Press the rotary switch (3) to control the adapter (16) to rotate until the nickel-chromium wire model (15) on the adapter (16) is placed horizontally. At this time, the thermal block (7) and the nickel-chromium wire model (15) are in complete contact. Step 6: Press the heating switch (4) and wait for the temperature of the nickel-chromium wire model (15) to rise. Wait until the temperature rises high enough to complete the heating step. Step seven: press the lifting switch (5), the electric extension rod (11) extends, drives the operating platform (14) to move upward until the operating platform (14) is in full contact with the nichrome wire model (15), at which time the polyurethane foam shaping is completed cutting; Step eight: press the heating switch (4) to stop heating, remove the polyurethane foam, press the rotation switch (3) to control the adapter (16) to rotate to the original position, and after the nichrome wire model (15) is cooled, it is put back into the main body (1) along the original path, and the lifting switch (5) is pressed to control the electric extension rod (11) to shorten, and the operating platform (14) returns to the original position; Step nine: move the cutting device to the designated storage position; Step ten: check the polyurethane foam after cutting, which is intact without burrs and the appearance meets the requirements.

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