Cutting device and cutting method for manufacturing EPS foam hollow cylinder sample

Abstract

The invention belongs to the technical field of geotechnical engineering soil test sample preparation, and particularly relates to a cutting device and a cutting method for manufacturing an EPS foam hollow cylinder sample, the device comprises a frame main body, the bottom of the frame main body is fixedly arranged on a working table, and the top of the frame main body is provided with a lifting end; the sample fixing platform is connected to the fixed end of the frame main body, and the sample fixing platform is used for fixing an EPS foam sample; the fixed end of the cutting assembly is used for being rotationally connected with the lifting end of the frame main body, and the cutting end of the cutting assembly rotates with the fixed end of the cutting assembly as the axis and then cuts the EPS foam sample into a cylindrical shape. The method comprises the steps that the height of the lifting end of the frame body is adjusted, and an EPS foam sample is fixedly installed on the sample fixing platform; the cutting assembly is connected with the lifting end of the frame body, the power supply assembly is started, the cutting assembly is used for cutting the EPS foam sample into a designated shape, and then the EPS foam can be cut into a cylinder shape.

Description

Technical Field

[0001] The invention belongs to the technical field of geotechnical engineering geotechnical test sample preparation, and in particular relates to a cutting device and a cutting method for making EPS foam hollow cylindrical samples. Background Art

[0002] Road subgrade, especially soft soil subgrade, will produce settlement deformation under the deadweight of the upper fill and the load of road vehicles. When the settlement deformation is too large, it may cause excessive differential settlement at the road-bridge connection and cause bridgehead jumping. It may also cause excessive differential settlement between the new and old pavements in road widening projects, resulting in longitudinal cracks on the pavement. Using lightweight fillers such as EPS foam in the subgrade can effectively reduce the deadweight, thereby reducing the post-construction settlement of the subgrade, ensuring smooth driving, and achieving the purpose of improving the quality of the subgrade.

[0003] With the increasing application of EPS foam in roadbed, scholars have gradually increased their research on the dynamic characteristics of EPS foam under vehicle and other traffic loads through indoor geotechnical tests. EPS foam is an anisotropic material, and its deformation is not only affected by the magnitude of the principal stress value, but also by the direction of the principal stress value. In the past, scholars mainly explored the influence of the principal stress value on the deformation of EPS foam through compression instruments and triaxial instruments. Therefore, the EPS foam specimens used in the experiments were all rectangular or cylindrical. When exploring the influence of the direction of the principal stress value, a hollow cylindrical torsion shear device must be used. The device requires the test to be a complete hollow cylindrical specimen, but the existing EPS foam specimen cutting devices are difficult to obtain a complete hollow cylindrical specimen. Therefore, a cutting device and cutting method for making EPS foam hollow cylindrical specimens are urgently needed to solve the problem. Summary of the invention

[0004] The purpose of the present invention is to provide a cutting device and a cutting method for making EPS foam hollow cylindrical specimens to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A frame body, wherein the bottom of the frame body is fixedly arranged on the work surface, and the top of the frame body is provided with a lifting end;

[0007] A sample fixing platform, connected to the fixed end of the frame body, the sample fixing platform is used to fix the EPS foam sample;

[0008] A cutting assembly, wherein the fixed end of the cutting assembly is used for rotationally connecting with the lifting end of the frame body, and the cutting end of the cutting assembly rotates with the fixed end of the cutting assembly as an axis to cut the EPS foam sample into a cylindrical shape;

[0009] A power supply component, electrically connected to the cutting component;

[0010] The protective cover is used to place the sample fixing platform, the cutting assembly and the frame body in the protective cover after use.

[0011] Optionally, the framework body includes:

[0012] A base, wherein the base is provided with a square hole for connecting with the sample fixing platform, and the square hole is arranged through;

[0013] The front and rear sides of the square hole are respectively provided with a long slot 1 which is arranged through;

[0014] A support portion, arranged at the bottom of the base;

[0015] A height adjustment part, the bottom fixed end of which is connected to the base, the movable end of which is connected to a top plate, and the top plate is provided with a stepped groove for connecting with the cutting assembly;

[0016] The top plate is provided with a slot for connecting with the protective cover.

[0017] Optionally, the support portion includes legs fixedly connected to four corners of the bottom of the base.

[0018] Optionally, the height adjustment part includes a main column, the bottom end of the main column is fixedly connected to one side of the top of the base, a deep groove is opened in the middle of the main column, a movable column is slidably arranged in the deep groove, the top end of the movable column is fixed to the end of the top plate, and the movable column slides along the main column and cooperates with the main column to limit the position.

[0019] Optionally, the movable column is provided with a plurality of equally spaced positioning screw holes, which are arranged in sequence along the height direction of the movable column, and any of the positioning screw holes is limitedly matched with a positioning screw rod, which is arranged through one side of the main column.

[0020] Optionally, the sample fixing platform comprises:

[0021] A support plate, fixedly connected to the base;

[0022] A positioning baffle, wherein two positioning baffles are provided and symmetrically arranged on the support plate, and a groove for slidingly cooperating with the support plate is provided on the positioning baffle;

[0023] Two positioning screw holes are respectively provided at the front and rear ends of the positioning baffle, and two positioning screws are passed through the two positioning screw holes. The bottom end of the two positioning screws passes through the corresponding long groove one, and the two positioning screws are threadedly matched with a positioning nut one. The positioning nut one is threadedly connected with the two positioning screws to clamp and fix the base and the positioning baffle.

[0024] Optionally, the cutting assembly comprises:

[0025] A top cover, wherein the top cover is provided with a stepped structure, the top cover is placed in the stepped groove, and the top cover is rotatably matched with the stepped groove; a small hole is opened in the center of the top cover, and a handle is rotatably connected to one side of the top of the top cover;

[0026] A hand-cranked drill bit is installed in the middle of the top cover through the small hole;

[0027] A flat plate, arranged at the bottom of the hand-cranked drill;

[0028] The heating wire is installed at one end of the flat plate.

[0029] Optionally, the hand-cranked drill bit comprises:

[0030] A threaded rod, the threaded rod is arranged in the small hole; an upper nut and a lower nut are threadedly connected at the middle of the threaded rod, the upper nut and the lower nut are respectively located at the top and the bottom of the top cover, and the threaded rod is fixed to the top cover after the upper nut and the lower nut are tightened;

[0031] A hand wheel, the shaft of which is connected to the top of the threaded rod;

[0032] A top nut and a second positioning nut, the top nut and the second positioning nut are threadedly connected to the threaded rod, the flat plate is clamped between the top nut and the second positioning nut, and the top nut and the second positioning nut are used to fix the flat plate to the threaded rod.

[0033] Optionally, a second long slot is opened in the middle of the plate, and the threaded rod passes through the second long slot so that the plate is clamped between the top nut and the second positioning nut;

[0034] The heating wire is connected to the flat plate through the second long slot.

[0035] Optionally, the heating wire includes a nickel-chromium alloy heating wire, a heating wire head is connected to the top axis of the nickel-chromium alloy heating wire, a short screw is connected to the top axis of the heating wire head, the short screw passes through the second long slot, the short screw thread is matched with the second positioning nut, and the flat plate is clamped between the second positioning nut and the heating wire head.

[0036] A method for using a cutting device for making an EPS foam hollow cylindrical sample, using the above-mentioned cutting device for making an EPS foam hollow cylindrical sample, comprising the following steps:

[0037] Adjust the height of the lifting end of the frame body to fix the EPS foam sample on the sample fixing platform;

[0038] Connect the cutting assembly to the lifting end of the frame body, start the power supply assembly, rotate the fixed end of the cutting assembly so that the cutting end of the cutting assembly moves in a circular motion to cut the EPS foam sample into a cylindrical shape;

[0039] After the cutting end of the cutting assembly is moved, the cutting end of the cutting assembly is rotated in the cylindrical EPS foam sample to form a cylindrical EPS foam sample;

[0040] Remove the cut EPS foam, close the power supply assembly, and connect the protective cover to the frame body for protection.

[0041] Compared with the prior art, the present invention has the following advantages and technical effects:

[0042] When in use, adjust the height of the lifting end of the frame body and fix the EPS foam sample on the sample fixing platform; connect the cutting assembly to the lifting end of the frame body, start the power supply assembly, rotate the fixed end of the cutting assembly to make the cutting end of the cutting assembly move in a circular motion to cut the EPS foam sample into a cylinder; after moving the cutting end of the cutting assembly, make the cutting end of the cutting assembly rotate inside the cylindrical EPS foam sample to form a cylindrical EPS foam sample; remove the cut EPS foam, turn off the power supply assembly, and connect the protective cover to the frame body for protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0044] Figure 1 It is a schematic diagram of the structure of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the cutting assembly of the present invention;

[0046] Figure 3 This is a schematic diagram of the protective cover structure of the present invention;

[0047] Figure 4 This is a schematic diagram of the main structure of the framework of the present invention;

[0048] Figure 5 This is a schematic diagram of the use state of the present invention;

[0049] Figure 6 This is a schematic diagram of the present invention when cutting an inner circle;

[0050] Figure 7 This is a schematic diagram of the present invention when cutting an outer circle;

[0051] Among them, 1001, support leg; 1002, base; 1003, main column; 1004, movable column; 1005, top plate; 1006, square hole; 1007, long groove one; 1008, deep groove; 1009, positioning screw hole one; 1010, positioning screw rod one; 1011, stepped groove; 1012, slot; 2001, positioning baffle; 2002, support plate; 2003, positioning screw hole two; 2004, positioning screw rod two; 2005, positioning nut one; 2006, groove; 30 01. Top cover; 3002. Hand-crank drill; 3003. Flat plate; 3004. Heating wire; 3005. Positioning nut 2; 3006. Small hole; 3007. Handle; 3008. Handwheel; 3009. Threaded rod; 3010. Upper nut; 3012. Top nut; 3013. Long slot 2; 3014. Heating wire head; 3015. Nickel-chromium alloy heating wire; 3016. Short screw; 4001. Transformer; 4003. Adjustable temperature knob; 5001. Cover; 5002. Buckle. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Reference Figures 1 to 7 The present invention discloses a cutting device for making EPS foam hollow cylindrical specimens, comprising:

[0055] A frame body, the bottom of which is fixedly arranged on the work surface, and a lifting end is arranged on the top of the frame body;

[0056] A sample fixing platform is connected to the fixed end of the frame body, and the sample fixing platform is used to fix the EPS foam sample;

[0057] A cutting assembly, wherein the fixed end of the cutting assembly is used for rotationally connecting with the lifting end of the frame body, and the cutting end of the cutting assembly rotates with the fixed end of the cutting assembly as an axis to cut the EPS foam sample into a cylindrical shape;

[0058] A power supply component electrically connected to the cutting component;

[0059] Protective cover: after use, the sample fixing platform, cutting assembly and frame body are placed in the protective cover.

[0060] When in use, adjust the height of the lifting end of the frame body and fix the EPS foam sample on the sample fixing platform; connect the cutting assembly to the lifting end of the frame body, start the power supply assembly, rotate the fixed end of the cutting assembly to make the cutting end of the cutting assembly move in a circular motion to cut the EPS foam sample into a cylinder; after moving the cutting end of the cutting assembly, make the cutting end of the cutting assembly rotate inside the cylindrical EPS foam sample to form a cylindrical EPS foam sample; remove the cut EPS foam, turn off the power supply assembly, and connect the protective cover to the frame body for protection.

[0061] As an optional implementation, the framework body includes:

[0062] A base 1002, on which a square hole 1006 for connecting to a sample fixing platform is disposed, and the square hole 1006 is arranged through;

[0063] The front and rear sides of the square hole 1006 are respectively provided with a long slot 1007 extending therethrough;

[0064] A support portion, disposed at the bottom of the base 1002;

[0065] The height adjustment part has a bottom fixed end connected to the base 1002, and a movable end of the height adjustment part is connected to a top plate 1005, and a stepped groove 1011 for connecting with the cutting assembly is provided on the top plate 1005;

[0066] The top plate 1005 is provided with a slot 1012 for connecting with the protective cover.

[0067] As an optional implementation, the support portion includes legs 1001 fixedly connected to four corners of the bottom of the base 1002 .

[0068] As an optional embodiment, the height adjustment part includes a main column 1003, the bottom end of the main column 1003 is fixedly connected to one side of the top of the base 1002, a deep groove 1008 is opened in the middle of the main column 1003, a movable column 1004 is slidably arranged in the deep groove 1008, the top end of the movable column 1004 is fixed to the end of the top plate 1005, and the movable column 1004 slides along the main column 1003 and then cooperates with the main column 1003 to limit the position.

[0069] As an optional embodiment, a plurality of equally spaced positioning screw holes 1009 are provided on the movable column 1004, and the plurality of positioning screw holes 1009 are arranged in sequence along the height direction of the movable column 1004. Any positioning screw hole 1009 is limited by a positioning screw rod 1010, and the positioning screw rod 1010 is arranged through one side of the main column 1003.

[0070] The frame body includes: a support leg 1001, a base 1002, a main column 1003, a movable column 1004 and a top plate 1005. There are 4 support legs 1001, which are arranged at the four corners of the base 1002. The base 1002 has a square hole 1006 in the center and two long grooves 1007 in the front and back. The main column 1003 stands at the left end of the base 1002. The main column 1003 has a deep groove 1008 in the center. The movable column 1004 can be Inserted into the deep groove 1008, the movable column 1004 is provided with a plurality of positioning screw holes 1009, and a positioning screw 1010 can fix the movable column 1004 at different heights of the main column 1003 through the positioning screw hole 1009. The top plate 1005 is arranged above the movable column 1004, and a stepped groove 1011 is arranged in the center of the top plate 1005. The stepped groove 1011 is larger at the upper end and smaller at the lower end, and a card slot 1012 is arranged at the right end of the top plate 1005.

[0071] As an optional embodiment, the sample fixing platform includes:

[0072] A support plate 2002 is fixedly connected to the base 1002;

[0073] Positioning baffles 2001, two positioning baffles 2001 are provided and symmetrically arranged on the support plate 2002, and a groove 2006 for slidingly cooperating with the support plate 2002 is opened on the positioning baffles 2001;

[0074] The front and rear ends of the positioning baffle 2001 are respectively provided with a second positioning screw hole 2003, and a second positioning screw 2004 is inserted into the second positioning screw hole 2003. The bottom end of the second positioning screw 2004 passes through the corresponding long groove 1007. The thread of the second positioning screw 2004 is matched with a positioning nut 2005. The positioning nut 2005 is threadedly connected with the second positioning screw 2004 to clamp and fix the base 1002 and the positioning baffle 2001.

[0075] The sample fixing platform includes a positioning baffle 2001 and a support plate 2002, wherein there are two positioning baffles 2001 and two support plates 2002. The positioning baffle 2001 is provided with two positioning screw holes 2003 at the front and rear, the positioning screw 2004 passes through the positioning screw hole 2003 and the long groove 1007, and the positioning nut 2005 is fixed on the positioning screw 2004 to fix the positioning baffle 2001 on the base 1002. The positioning baffle 2001 is also provided with two grooves 2006 with bottom openings, and the support plate 2002 can pass through the grooves 2006 and be placed on the base 1002.

[0076] As an optional embodiment, the cutting assembly includes:

[0077] A top cover 3001 is provided with a stepped structure, the top cover 3001 is placed in the stepped groove 1011, and the top cover 3001 is rotatably matched with the stepped groove 1011; a small hole 3006 is opened in the center of the top cover 3001, and a handle 3007 is rotatably connected to one side of the top of the top cover 3001;

[0078] A hand-operated drill bit 3002 is installed in the middle of the top cover 3001 through a small hole 3006;

[0079] A flat plate 3003 is provided at the bottom of the hand-operated drill 3002;

[0080] The heating wire 3004 is installed at one end of the flat plate 3003 .

[0081] As an optional embodiment, the hand-cranked drill bit 3002 includes:

[0082] The threaded rod 3009 is arranged in the small hole 3006; the middle part of the threaded rod 3009 is threadedly connected with an upper nut 3010 and a lower nut, the upper nut 3010 and the lower nut are respectively located at the top and the bottom of the top cover 3001, and the threaded rod 3009 is fixed to the top cover 3001 after the upper nut 3010 and the lower nut are tightened;

[0083] Hand wheel 3008, shaft connected to the top of threaded rod 3009;

[0084] The top nut 3012 and the second positioning nut 3005 are threadedly connected to the threaded rod 3009, and the plate 3003 is clamped between the top nut 3012 and the second positioning nut 3005. The top nut 3012 and the second positioning nut 3005 are used to fix the plate 3003 and the threaded rod 3009.

[0085] As an optional implementation, a second long slot 3013 is opened in the middle of the flat plate 3003, and the threaded rod 3009 passes through the second long slot 3013 so that the flat plate 3003 is clamped between the top nut 3012 and the second positioning nut 3005;

[0086] The heating wire 3004 is connected to the flat plate 3003 through the second long groove 3013 .

[0087] As an optional embodiment, the heating wire 3004 includes a nickel-chromium alloy heating wire 3015, the top axis of the nickel-chromium alloy heating wire 3015 is connected to a heating wire head 3014, the top axis of the heating wire head 3014 is connected to a short screw 3016, the short screw 3016 passes through the long slot 2 3013, the short screw 3016 is threadedly matched with the positioning nut 2 3005, and the flat plate 3003 is clamped between the positioning nut 2 3005 and the heating wire head 3014.

[0088] The cutting assembly includes a top cover 3001, a hand-cranked drill 3002, a plate 3003, a heating wire 3004 and a second positioning nut 3005. The top cover 3001 can be seamlessly placed in the stepped groove 1011. The top cover 3001 is provided with a small hole 3006 in the center and a handle 3007 on one side. The hand-cranked drill 3002 is provided with a hand wheel 3008, a threaded rod 3009, an upper nut 3010, a lower nut and a top nut 3012. The plate 3003 is provided with a second long groove 3013 in the center, and the threaded rod 3009 is provided with a handle 3007 on one side. 9 can be fixed in the second long slot 3013 by the top nut 3012 and the second positioning nut 3005. The heating wire 3004 consists of a heating wire head 3014 and a nickel-chromium alloy heating wire 3015. A short screw 3016 is arranged above the heating wire head 3014. The heating wire head 3014, the nickel-chromium alloy heating wire 3015 and the short screw 3016 can all conduct electricity. The short screw 3016 on the heating wire head 3014 passes through the second long slot 3013 and is fixed on the plate 3003 by the second positioning nut 3005.

[0089] As an additional implementation method, the power supply component includes:

[0090] Transformer 4001 and electric wires, transformer 4001 is fixedly connected to the bottom of the top cover 3001, transformer 4001 includes an adjustable temperature knob 4003 and a built-in power supply, after the electric wires extend from transformer 4001, the ends of the electric wires can be fixed on the heating wire head 3014, and the adjustable temperature knob 4003 is located on transformer 4001, and is used to adjust the temperature of the nickel-chromium alloy heating wire 3015.

[0091] As an additional implementation, the protective cover includes:

[0092] The cover body 5001 and the buckle 5002 , the cover body 5001 protects the device body by inserting the buckle 5002 into the card slot 1012 .

[0093] As an optional embodiment, the support leg 1001, the base 1002, the main column 1003, the movable column 1004, the top plate 1005, the top cover 3001, the transformer 4001 and the neutral line fixing screw cannot be removed from the device body;

[0094] As an optional embodiment, the positioning baffle 2001, the support plate 2002, the top cover 3001, the hand-cranked drill 3002, the flat plate 3003, the heating wire 3004, the positioning nut 2 3005, the cover body 5001 and the buckle 5002 can be removed from the frame body.

[0095] A method for using a cutting device for making an EPS foam hollow cylindrical sample, using the above-mentioned cutting device for making an EPS foam hollow cylindrical sample, comprising the following steps:

[0096] Adjust the height of the lifting end of the frame body and fix the EPS foam sample on the sample fixing platform;

[0097] Connect the cutting assembly to the lifting end of the frame body, start the power supply assembly, rotate the fixed end of the cutting assembly to make the cutting end of the cutting assembly move in a circular motion to cut the EPS foam sample into a cylindrical shape;

[0098] After the cutting end of the cutting assembly is moved, the cutting end of the cutting assembly is rotated in the cylindrical EPS foam sample to form a cylindrical EPS foam sample;

[0099] Remove the cut EPS foam, turn off the power supply assembly, and connect the protective cover to the frame body for protection.

[0100] A simple cutting method for making EPS foam hollow cylindrical specimens, based on a simple cutting device for making EPS foam hollow cylindrical specimens, the cutting method is as follows:

[0101] I. Adjust the height of the movable column 1004 so that the distance between the top plate 1005 and the base 1002 is about 30 cm, then fix the movable column 1004 to the main column 1003 through the positioning screw 1010, and then fix the two positioning baffles 2001 to both sides of the center of the base 1002 through the positioning screw 2004, the distance between the two positioning baffles 2001 is 35.2 cm, and then insert the two support plates 2002 into the grooves 2006 of the positioning baffles 2001;

[0102] II. Place the top cover 3001 into the stepped groove 1011, insert the threaded rod 3009 in the hand drill 3002 into the small hole 3006 in the top cover 3001, the upper nut 3010 is located above the top cover 3001, and the lower nut is located below the top cover 3001. By adjusting the positions of the upper nut 3010 and the lower nut, the threaded rod 3009 is lowered to a position where the flat plate 3003 is 30 cm away from the base 1002, and then the flat plate 3003 is fixed to the lower end of the threaded rod 3009 by positioning the nut 3005;

[0103] III. Fix the neutral wire on the neutral wire fixing screw, insert the short screw 3016 in the heating wire 3004 into the long slot 2 3013 from the bottom of the flat plate 3003, and then fix the live wire and the heating wire 3004 on the flat plate 3003 through the positioning nut 2 3005. Assuming that the diameter of the nickel-chromium alloy heating wire 3015 is 2 mm, after the heating wire 3004 is fixed, the horizontal distance between the left end of the nickel-chromium alloy heating wire 3015 and the left positioning baffle 2001 is 20 cm, and the horizontal distance between the right end of the nickel-chromium alloy heating wire 3015 and the right positioning baffle is 15 cm.

[0104] IV. Turn on the adjustable temperature knob 4003 to adjust the heating wire 3004 to a certain temperature, place an EPS foam block with a size greater than 15 cm × 15 cm × 20 cm (length × width × height) on the support plate 2002 close to the left positioning baffle 2001, move the EPS foam, cut the EPS foam block into blocks with a height of 20 cm by the heating wire 3004, and then place the EPS foam block on the support plate 2002 close to the right positioning baffle 2001, move the EPS foam, cut the EPS foam block into blocks with a height of 15 cm × 15 cm × 20 cm (length × width × height) by the heating wire 3004, and then remove the cut EPS foam;

[0105] V. Turn off the adjustable temperature knob 4003. Assuming that the length of the nickel-chromium alloy heating wire 3015 is 30 cm, adjust the positions of the upper nut 3010 and the lower nut to make the threaded rod 3009 and the heating wire 3004 rise to a position where the flat plate 3003 is 55 cm away from the base 1002. After the heating wire 3004 cools down, remove the support plate 2002, adjust the positions of the two positioning baffles 2001, and fix the cut EPS foam block just below the center of the top cover 3001 through the positioning baffles 2001;

[0106] VI. Adjust the position of the heating wire 3004 on the flat plate 3003 by positioning the second nut 3005 so that the horizontal distance between the left end of the nickel-chromium alloy heating wire 3015 and the center of the EPS foam block is 3 cm. After the adjustment, turn on the adjustable temperature knob 4003 to adjust the heating wire 3004 to a certain temperature. Adjust the positions of the upper nut 3010 and the lower nut to move the threaded rod 3009 and the heating wire 3004 downward by 30 cm. Then turn the handle 3007 to rotate the top cover 3001 together with the heating wire 3004, thereby cutting an inner circle in the EPS foam block.

[0107] VII. Turn off the adjustable temperature knob 4003. After the heating wire 3004 cools down, adjust the positions of the upper nut 3010 and the lower nut to move the threaded rod 3009 and the heating wire 3004 upward by 30 cm. Adjust the position of the heating wire 3004 on the flat plate 3003 again by positioning the second nut 3005 so that the horizontal distance between the left end of the nickel-chromium alloy heating wire 3015 and the center of the EPS foam block is 10 cm. After adjustment, turn on the adjustable temperature knob 4003 and adjust it to a certain temperature. Adjust the positions of the upper nut 3010 and the lower nut to move the threaded rod 3009 and the heating wire 3004 downward by 30 cm. Then turn the handle 3007 to rotate the top cover 3001 together with the heating wire 3004, and then cut out an outer circle in the EPS foam block. At this point, the cutting of the EPS foam hollow cylindrical sample is completed.

[0108] VIII. Turn off the adjustable temperature knob 4003, and adjust the positions of the upper nut 3010 and the lower nut to move the threaded rod 3009 and the heating wire 3004 upward until they leave the EPS foam block, remove the EPS foam block, take out and save the hollow cylindrical sample in the middle of the EPS foam block, disassemble the positioning baffle 2001, the top cover 3001, the hand-cranked drill bit 3002, the flat plate 3003, the heating wire 3004, and the positioning nut 2 3005, and finally insert the buckle 5002 in the cover body 5001 into the slot 1012 to protect the main body of the device.

[0109] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0110] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cutting device for making EPS foam hollow cylindrical specimens, characterized in that: include: A frame body, wherein the bottom of the frame body is fixedly arranged on the work surface, and the top of the frame body is provided with a lifting end; A sample fixing platform, connected to the fixed end of the frame body, the sample fixing platform is used to fix the EPS foam sample; A cutting assembly, wherein the fixed end of the cutting assembly is used for rotationally connecting with the lifting end of the frame body, and the cutting end of the cutting assembly rotates with the fixed end of the cutting assembly as an axis to cut the EPS foam sample into a cylindrical shape; A power supply component, electrically connected to the cutting component; The protective cover is used to place the sample fixing platform, the cutting assembly and the frame body in the protective cover after use.

2. A cutting device for making EPS foam hollow cylindrical specimens according to claim 1, characterized in that: The framework body comprises: A base (1002), wherein the base (1002) is provided with a square hole (1006) for connecting with the sample fixing platform, and the square hole (1006) is arranged through; The front and rear sides of the square hole (1006) are respectively provided with a long slot (1007) extending therethrough; A support portion, arranged at the bottom of the base (1002); A height adjustment portion, the bottom fixed end of which is connected to the base (1002), the movable end of which is connected to a top plate (1005), and the top plate (1005) is provided with a stepped groove (1011) for connecting with the cutting assembly; The top plate (1005) is provided with a slot (1012) for connecting with the protective cover.

3. A cutting device for making EPS foam hollow cylindrical specimens according to claim 2, characterized in that: The height adjustment portion comprises a main column (1003), the bottom end of the main column (1003) is fixedly connected to one side of the top of the base (1002), a deep groove (1008) is provided in the middle of the main column (1003), a movable column (1004) is slidably arranged in the deep groove (1008), the top end of the movable column (1004) is fixed to the end of the top plate (1005), and the movable column (1004) slides along the main column (1003) and then cooperates with the main column (1003) in a limiting manner.

4. A cutting device for making EPS foam hollow cylindrical specimens according to claim 3, characterized in that: The movable column (1004) is provided with a plurality of equally spaced positioning screw holes (1009), and the plurality of positioning screw holes (1009) are sequentially arranged along the height direction of the movable column (1004). Any of the positioning screw holes (1009) is limitedly matched with a positioning screw rod (1010), and the positioning screw rod (1010) is arranged through one side of the main column (1003).

5. A cutting device for making EPS foam hollow cylindrical specimens according to claim 2, characterized in that: The sample fixing platform comprises: A support plate (2002) fixedly connected to the base (1002); A positioning baffle (2001), wherein two positioning baffles (2001) are provided and symmetrically arranged on the support plate (2002), and a groove (2006) is provided on the positioning baffle (2001) for slidingly cooperating with the support plate (2002); The front and rear ends of the positioning baffle (2001) are respectively provided with positioning screw holes 2 (2003), and positioning screw rods 2 (2004) are inserted into the positioning screw holes 2 (2003). The bottom end of the positioning screw rods 2 (2004) passes through the corresponding long groove 1 (1007). The positioning screw rods 2 (2004) are threadedly matched with positioning nut 1 (2005). The positioning nut 1 (2005) is threadedly connected with the positioning screw rods 2 (2004) to clamp and fix the base (1002) and the positioning baffle (2001).

6. A cutting device for making EPS foam hollow cylindrical specimens according to claim 2, characterized in that: The cutting assembly comprises: A top cover (3001), wherein the top cover (3001) is provided with a stepped structure, the top cover (3001) is placed in the stepped groove (1011), and the top cover (3001) and the stepped groove (1011) are rotatably matched; a small hole (3006) is opened in the center of the top cover (3001), and a handle (3007) is rotatably connected to one side of the top of the top cover (3001); A hand-operated drill bit (3002) is installed in the middle of the top cover (3001) through the small hole (3006); A flat plate (3003) is arranged at the bottom of the hand-cranked drill (3002); The heating wire (3004) is installed at one end of the flat plate (3003).

7. A cutting device for making EPS foam hollow cylindrical specimens according to claim 6, characterized in that: The hand-operated drill bit (3002) comprises: a threaded rod (3009), wherein the threaded rod (3009) is disposed in the small hole (3006); an upper nut (3010) and a lower nut are threadedly connected in the middle of the threaded rod (3009), wherein the upper nut (3010) and the lower nut are respectively located at the top and the bottom of the top cover (3001), and when the upper nut (3010) and the lower nut are tightened, the threaded rod (3009) is fixed to the top cover (3001); A hand wheel (3008) axially connected to the top of the threaded rod (3009); A top nut (3012) and a second positioning nut (3005), wherein the top nut (3012) and the second positioning nut (3005) are threadedly connected to the threaded rod (3009), and the plate (3003) is clamped between the top nut (3012) and the second positioning nut (3005), and the top nut (3012) and the second positioning nut (3005) are used to fix the plate (3003) and the threaded rod (3009).

8. The cutting device for making EPS foam hollow cylindrical specimens according to claim 7, characterized in that: A second long slot (3013) is provided in the middle of the plate (3003), and the threaded rod (3009) passes through the second long slot (3013) so that the plate (3003) is clamped between the top nut (3012) and the second positioning nut (3005); The heating wire (3004) is connected to the flat plate (3003) through the second long groove (3013).

9. A cutting device for making EPS foam hollow cylindrical specimens according to claim 8, characterized in that: The heating wire (3004) comprises a nickel-chromium alloy heating wire (3015), the top of the nickel-chromium alloy heating wire (3015) is axially connected to a heating wire head (3014), the top of the heating wire head (3014) is axially connected to a short screw (3016), the short screw (3016) passes through the second long slot (3013), the short screw (3016) is threadedly matched with the second positioning nut (3005), and the flat plate (3003) is clamped between the second positioning nut (3005) and the heating wire head (3014).

10. A method for using a cutting device for making a hollow cylindrical sample of EPS foam, using the cutting device for making a hollow cylindrical sample of EPS foam according to any one of claims 1 to 9, characterized in that: The steps include: Adjust the height of the lifting end of the frame body to fix the EPS foam sample on the sample fixing platform; Connect the cutting assembly to the lifting end of the frame body, start the power supply assembly, rotate the fixed end of the cutting assembly so that the cutting end of the cutting assembly moves in a circular motion to cut the EPS foam sample into a cylindrical shape; After the cutting end of the cutting assembly is moved, the cutting end of the cutting assembly is rotated in the cylindrical EPS foam sample to form a cylindrical EPS foam sample; Remove the cut EPS foam, close the power supply assembly, and connect the protective cover to the frame body for protection.

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