Protective device for metal square pipe cutting

Abstract

The invention relates to the technical field of metal cutting, in particular to a protective device for metal square tube cutting, which comprises a machining table, a cutting base fixed on the machining table, a first positioning block for clamping a square tube body and a pushing plate for pushing the square tube body, a cutting base is fixedly installed at the center of one side of the top of the machining table through bolts, a cutting side frame is fixedly welded to one side of the top of the cutting base, a cutting plate is movably connected to one side of the cutting side frame, and a hydraulic rod is fixedly installed at the center of the top of one side of the cutting plate through bolts; and a metal fuse which is movably arranged on the cutting base is mounted at the bottom end of the hydraulic rod. According to the device, the 180-degree reciprocating overturning effect is achieved on a V-shaped overturning groove in a U-shaped fixing plate and a limiting base through a rotating column connected to a movable plate through a bearing, a cut square pipe body is overturned to the position below a fan base through a first positioning block on the rotating column, the discharging overturning and cooling effects of the square pipe body are achieved, and the protection performance is high.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting, in particular to a protective device for cutting metal square tubes. Background Art

[0002] Historically, thermal cutting of metal sheets has been performed by thermal cutting machines such as plasma cutting machines or laser cutting machines. Plasma cutting is a processing method that uses the heat of a high-temperature plasma arc to partially or locally melt the metal at the cut of the workpiece, and uses the momentum of high-speed plasma to remove the molten metal to form a cut.

[0003] At present, in a plasma cutting machine, the plate is usually placed on multiple partitions, and then the cutting head is moved to a suitable position to cut the plate. However, the cut plate needs to be removed manually and placed neatly. After high-temperature plasma cutting, a very high temperature will be formed at the incision of the square steel pipe. At this time, the operator will suffer certain burns during the cutting, unloading and taking of the metal square pipe. Now, workers use clamping frames to clamp and take the square pipe. The clamping and taking process is labor-intensive, time-consuming and labor-intensive for the operator, and it is very easy to fall due to unstable taking of the operator, posing a great safety hazard. In addition, after cutting, the operator is still required to continuously feed the square pipe, and at this time, it will also come into contact with the high-temperature square pipe. There are currently no good protective measures against the high temperature of cutting metal square pipes. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a protective device for cutting metal square tubes.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a processing table, a cutting base fixed on the processing table, a first positioning block for clamping a square tube body, and a pushing plate for pushing the square tube body, the cutting base is fixedly installed at the center of one side of the top of the processing table by bolts, a cutting side frame is welded and fixed to one side of the top of the cutting base, a cutting plate is movably connected to one side of the cutting side frame, a hydraulic rod is fixedly installed at the center of one side of the top of the cutting plate by bolts, a metal fuse movably mounted on the cutting base is installed at the bottom end of the hydraulic rod, a flip assembly for flipping the first positioning block is arranged inside the processing table, wherein the flip assembly comprises:

[0006] A rotating column that drives the first positioning block to flip horizontally, a supporting plate is fixedly installed on one side of the bottom of the cutting base in the processing table by bolts, a U-shaped fixing plate is fixedly installed between the tops of the supporting plates by bolts, a V-shaped flipping groove is arranged at the center of the bottom of the U-shaped fixing plate, a limiting base is fixedly installed between the two ends of the top of the U-shaped fixing plate by bolts, a movable plate is movably arranged on the top of the limiting base, a bearing is fixedly installed at the center of the movable plate by bolts, the rotating column is fixedly installed at the center movable part of the bearing by bolts, a rotating plate is fixedly installed at the bottom end of the rotating column by bolts, a limiting shaft that matches the size of the V-shaped flipping groove is fixedly installed at the center of one side of the rotating plate by bolts, and the limiting shaft moves in the V-shaped flipping groove;

[0007] A rotating disk that drives the movable plate to reciprocate back and forth, a motor frame is fixedly installed at the center of one side of the support plate in the processing table by bolts, a first motor is fixedly installed at the bottom side of the motor frame by bolts, an output end of the first motor is connected to a rotating rod, the bearing is fixedly installed at the center of the top side of the motor frame by bolts, the top end of the rotating rod passes through the bearing on the motor frame and extends to one side of the outside, and the top end of the rotating rod is fixedly installed at the bottom center of the rotating disk by bolts, and a hinged rod is movably connected between the top side of the rotating disk and the center of one side of the movable plate through a rotating shaft;

[0008] The pushing plate drives the square tube body to push, a first bevel gear is movably connected to the center of one side of the top of the motor frame through the bearing, and the rotating rod is fixedly installed at the center of the first bevel gear through bolts, a second bevel gear meshing with the first bevel gear is movably connected to the center of one side of the motor frame through the bearing, a movable screw is fixedly installed at the center of one side of the second bevel gear through bolts, and one end of the movable screw is threadedly connected to a pushing block connected to the pushing plate;

[0009] An L-shaped base plate for cooling the square tube body is fixedly installed on one end of the top of the processing table by bolts, and a blower is fixedly installed on the center of one side of the top of the L-shaped base plate by bolts.

[0010] As a preferred technical solution of the present invention, a second motor is fixedly installed at the center of one end of the cutting base by bolts, a second screw is fixedly installed at the output end of the second motor, a cutting table is threadedly penetrated on the second screw, and second limit rods are fixedly installed on both sides of the second screw by bolts on the cutting base, two ends of the bottom of the cutting table are movably penetrated in the second limit rods, and the square tube body is movably provided on the top of the cutting table.

[0011] A third motor is fixedly installed on one side of the cutting side frame by bolts, a third screw is fixedly installed on the output end of the third motor, a thread on the second screw is connected to the center of one side of the bottom of the cutting plate, a third limiting rod is fixedly installed on both sides of the third screw by bolts on the cutting side frame, both ends of the bottom of the cutting plate are movable through the third limiting rod, and the metal fuse is movable at the top center of the cutting table.

[0012] As a preferred technical solution of the present invention, a fan base with an air outlet is fixedly installed at the center of one side of the bottom of the L-shaped base plate by bolts, and the output end of the blower is connected to the fan base through an arc-shaped duct.

[0013] A limiting slot is provided at the top center of the limiting base, and a limiting slider is slidably connected to the limiting slot on the limiting base, and one end of the top of the limiting slider is fixedly mounted at the center of the two ends of the bottom of the movable plate by bolts.

[0014] As a preferred technical solution of the present invention, the top end of the rotating column movably passes through the rotating groove provided on the top of the processing table, the first positioning block is installed on the top of the rotating column on one side of the top of the rotating groove through a connecting block, and the top of the processing table is connected to a second positioning block corresponding to the first positioning block on the other side of the cutting base through a connecting plate;

[0015] The first positioning block and the second positioning block are each provided with a positioning hole at the center of the top for clamping and positioning the square tube body, and the first positioning block and the second positioning block are provided with a positioning groove at the center of the top of the positioning hole, and the first positioning block and the second positioning block are provided with a positioning plate movably arranged in the positioning groove, and the positioning plate and the positioning groove are matched in size, and the center of the positioning plate is threadedly penetrated by a positioning screw, and the top thread of the positioning screw extends to the outside of the top of the first positioning block and the second positioning block, and a rotating disk is fixedly installed on the top of the positioning screw by bolts, and clamping blocks with serrated grooves are fixedly installed on both ends of one side of the bottom of the positioning plate by bolts.

[0016] As a preferred technical solution of the present invention, the top end of the movable screw is connected to one inner end of the processing table through the bearing, and T-shaped limit rods are fixedly installed in the processing table by bolts at the centers of both sides of the movable screw, and the two ends of the pushing block movably pass through the T-shaped limit rods, and an electric telescopic rod is fixedly installed at the center of one side of the top of the pushing block by bolts, and the top end of the electric telescopic rod is fixedly installed at the bottom center of the pushing plate by bolts.

[0017] A movable groove having a size matching that of the push plate is provided on the top of the processing table at the other side of the cutting base, and the push plate movably passes through the movable groove.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] 1. The rotating column connected by the bearing on the movable plate realizes a 180° reciprocating flipping effect on the V-shaped flipping groove and the limit base on the U-shaped fixed plate. The first positioning block on the rotating column is used to flip the cut square tube body under the fan base to realize the discharging flip and cooling of the square tube body.

[0020] 2. The hinged rod on the rotating disk drives the movable plate to perform stable reciprocating motion under the action of the limiting base, limiting slide groove and limiting slider, completing the pushing and discharging of the first positioning block and the continuous flipping motion, and the structure is simple and stable.

[0021] 3. The first motor drives the rotating disk to move and rotate the first positioning block. At the same time, the first bevel gear and the second bevel gear are engaged to drive the push block on the movable screw to perform stable reciprocating motion in the T-type limit rod. The push block drives the push plate to push the square tube body, thereby realizing the loading of the first positioning block and the linkage is stable.

[0022] 4. The clamping blocks under the positioning plate clamp and fix the two ends of the square tube body through the rotating disks on the first positioning block and the second positioning block, so that the cutting is stable. The cutting material is flipped through the first positioning block, and the first positioning block cooperates with the pushing plate to realize intermittent loading, which has a protective effect on the high temperature during the cutting of the metal square tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure of the middle processing table;

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the connection structure of the middle U-shaped fixed plate;

[0027] Figure 5 For the present invention Figure 4 Schematic diagram of the connection structure of the middle push block;

[0028] Figure 6 For the present invention Figure 2Schematic diagram of the connection structure of the middle cutting base;

[0029] Figure 7 For the present invention Figure 1 Schematic diagram of the connection structure of the middle L-shaped base plate;

[0030] Figure 8 For the present invention Figure 4 Schematic diagram of the internal structure of the first positioning block;

[0031] Fig. 9 For the present invention Figure 4 Schematic diagram of the connection structure of the middle limit base.

[0032] Among them: 10, processing table; 11, L-shaped base plate; 12, blower; 13, blower base; 14, arc-shaped duct; 15, rotating groove; 16, movable groove; 20, cutting base; 21, second motor; 22, second screw; 23, cutting table; 24, second limit rod; 30, first positioning block; 31, second positioning block; 32, positioning hole; 33, positioning groove; 34, positioning plate; 35, positioning screw; 36, clamping block; 37, connecting plate; 38, rotating disk; 39, connecting block; 40, pushing plate; 41, first bevel gear; 42, second bevel gear; 43, movable screw; 44. Push block; 45. T-type limit rod; 46. Electric telescopic rod; 50. Cutting side frame; 51. Cutting plate; 52. Hydraulic rod; 53. Metal fuse; 54. Third motor; 55. Third screw; 56. Third limit rod; 60. Rotating column; 61. Support plate; 62. U-shaped fixing plate; 63. V-shaped turning groove; 64. Limit base; 65. Movable plate; 66. Rotating plate; 67. Limit shaft; 68. Limit slider; 69. Limit slide groove; 70. Rotating disk; 71. Motor frame; 72. First motor; 73. Rotating rod; 74. Articulated rod; 90. Square tube; 91. Bearing. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0034] Embodiment: Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, it includes a processing table 10, a cutting base 20 fixed on the processing table 10, a first positioning block 30 for clamping the other tube body 90, and a pushing plate 40 for pushing the other tube body 90. The cutting base 20 is fixedly installed at the center of one side of the top of the processing table 10 by bolts, and a cutting side frame 50 is welded and fixed to one side of the top of the cutting base 20. A cutting plate 51 is movably connected to one side of the cutting side frame 50. A hydraulic rod 52 is fixedly installed at the center of the top of one side of the cutting plate 51 by bolts. A metal fuse 53 that is movable on the cutting base 20 is installed at the bottom end of the hydraulic rod 52. A flip assembly for flipping the first positioning block 30 is provided inside the processing table 10, wherein the flip assembly includes:

[0035] The rotating column 60 drives the first positioning block 30 to perform horizontal flipping. A support plate 61 is fixedly installed on one side of the bottom of the cutting base 20 in the processing table 10 by bolts. The support plate 61 is used to achieve support and fixation. A U-shaped fixing plate 62 is fixedly installed between the tops of the supporting plates 61 by bolts. A V-shaped flipping groove 63 is provided at the bottom center of the U-shaped fixing plate 62 to achieve the rotation and flipping movement of the rotating column 60. A limited base 64 is fixedly installed between the top two ends of the U-shaped fixing plate 62 by bolts. The top of the limited base 64 A movable plate 65 is provided at the bottom of the rotating column 60, a bearing 91 is fixedly installed at the center of the movable plate 65 by bolts, a rotating column 60 is fixedly installed at the center of the bearing 91 by bolts, a rotating plate 66 is fixedly installed at the bottom of the rotating column 60 by bolts, a limiting shaft 67 that matches the size of the V-shaped flip groove 63 is fixedly installed at the center of one side of the rotating plate 66 by bolts, and the limiting shaft 67 moves in the V-shaped flip groove 63, and the limiting shaft 67 is used to rotate the rotating column 60 connected to the bearing 91 on the movable plate 65;

[0036] The rotating disk 70 that drives the movable plate 65 to reciprocate back and forth, a motor frame 71 is fixedly installed by bolts at the center of one side of the support plate 61 in the processing table 10, and a first motor 72 is fixedly installed by bolts on the bottom side of the motor frame 71, and a rotating rod 73 is connected to the output end of the first motor 72 to drive the rotating disk 70 to perform stable rotational movement, and a bearing 91 is fixedly installed by bolts at the center of one side of the top of the motor frame 71, and the top of the rotating rod 73 passes through the bearing 91 on the motor frame 71 and extends to one side of the outside, and the top of the rotating rod 73 is fixedly installed at the bottom center of the rotating disk 70 by bolts, and a hinged rod 74 is movably connected between the top side of the rotating disk 70 and the center of one side of the movable plate 65 through a rotating shaft to realize a rotating connection, so that the movable plate 65 can reciprocate back and forth stably;

[0037] The push plate 40 drives the square tube body 90 to push, the center of one side of the top of the motor frame 71 is movably connected with the first bevel gear 41 through the bearing 91, and the rotating rod 73 is fixedly installed at the center of the first bevel gear 41 by bolts, and the center of one side of the motor frame 71 is movably connected with the second bevel gear 42 meshing with the first bevel gear 41 through the bearing 91, and the center of one side of the second bevel gear 42 is fixedly installed with a movable screw 43 by bolts, meshing and rotating, driving the movable screw 43 to perform stable rotational movement, and one end of the movable screw 43 is threadedly connected with a push block 44 connected to the push plate 40;

[0038] An L-shaped base plate 11 for cooling the square tube body 90 is fixedly installed on one end of the top of the processing table 10 by bolts, and a blower 12 is fixedly installed on the center of one side of the top of the L-shaped base plate 11 by bolts to cool the cut of the square tube body 90 by blowing air.

[0039] See also Figure 2 and Figure 6 A second motor 21 is fixedly installed at the center of one end of the cutting base 20 by bolts, a second screw rod 22 is fixedly installed at the output end of the second motor 21, a cutting table 23 is connected through a thread on the second screw rod 22, and a second limiting rod 24 is fixedly installed on the cutting base 20 by bolts on both sides of the second screw rod 22. The two ends of the bottom of the cutting table 23 are movably penetrated in the second limiting rod 24, and the limiting movement is realized to realize the conversion from rotational motion to linear reciprocating motion. The top of the cutting table 23 is movably provided with a square tube body 90 to achieve the effect of accurate positioning and cutting.

[0040] A third motor 54 is fixedly installed on one side of the cutting side frame 50 by bolts, and a third screw 55 is fixedly installed on the output end of the third motor 54. The second screw 22 is threaded and connected to the center of one side of the bottom of the cutting plate 51. A third limiting rod 56 is fixedly installed on both sides of the third screw 55 on the cutting side frame 50 by bolts. The two ends of the bottom of the cutting plate 51 are movable through the third limiting rod 56, so that the cutting plate 51 is converted from rotational motion to linear motion. The structure is stable, and the metal fuse 53 moves at the top center of the cutting table 23 to achieve accurate positioning and cutting.

[0041] See also Figure 1 , Figure 7 and Figure 8 A fan base 13 with an air outlet is fixedly installed at the center of one side of the bottom of the L-shaped base plate 11 by bolts, and the output end of the blower 12 is connected to the fan base 13 through an arc-shaped duct 14 to achieve temperature reduction and cooling.

[0042] A limiting groove 69 is provided at the top center of the limiting base 64, and a limiting slider 68 is slidably connected to the limiting base 64 in the limiting groove 69. One end of the top of the limiting slider 68 is fixedly installed at the center of the two ends of the bottom of the movable plate 65 by bolts, so that the movable plate 65 can perform stable reciprocating motion.

[0043] See also Figure 1 , Figure 2 and Fig. 9 The top of the rotating column 60 is movable through the rotating groove 15 provided on the top of the processing table 10. A first positioning block 30 is installed on the top of the rotating column 60 on one side of the top of the rotating groove 15 through a connecting block 39. A second positioning block 31 corresponding to the first positioning block 30 is connected on the top of the processing table 10 on the other side of the cutting base 20 through a connecting plate 37 to clamp and position the two ends of the cutting.

[0044] The first positioning block 30 and the second positioning block 31 are each provided with a positioning hole 32 at the top center for clamping and positioning the square tube body 90. The first positioning block 30 and the second positioning block 31 are provided with a positioning groove 33 at the top center of the positioning hole 32. The first positioning block 30 and the second positioning block 31 are movably provided with a positioning plate 34 in the positioning groove 33, and the positioning plate 34 and the positioning groove 33 are matched in size. The center of the positioning plate 34 is threadedly connected with a positioning screw 35 so that the positioning plate 34 can stably move up and down in the positioning screw 35. The top thread of the positioning screw 35 extends to the top outer side of the first positioning block 30 and the second positioning block 31, and the top of the positioning screw 35 is fixed with a rotating disk 38 by bolts, which is easy to operate. The two ends of the bottom side of the positioning plate 34 are fixed with a clamping block 36 with a serrated groove by bolts to clamp and position the cut square tube body 90, so that the cutting is stable.

[0045] See also Figure 2 , Figure 3 and Figure 5 The top end of the movable screw 43 is connected to one end of the inner part of the processing table 10 through a bearing 91. T-shaped limit rods 45 are fixedly installed at the centers of both sides of the movable screw 43 in the processing table 10 by bolts. Both ends of the pushing block 44 are movable through the T-shaped limit rods 45. An electric telescopic rod 46 is fixedly installed at the center of one side of the top of the pushing block 44 by bolts. The top end of the electric telescopic rod 46 is fixedly installed at the bottom center of the pushing plate 40 by bolts to increase the height and meet the cutting requirements.

[0046] A movable groove matching the size of the push plate 40 is provided on the top of the processing table 10 on the other side of the cutting base 20, and the push plate 40 is movable through the movable groove to achieve a pushing effect.

[0047] Working principle: insert the metal square tube into the second positioning block 31, and then enter the first positioning block 30 through the top of the cutting seat. During the cutting process, the rotating disk 70 on the first positioning block 30 and the second positioning block 31 is operated to drive the positioning plate 34 under the positioning screw 35 to move up and down in the positioning groove 33, and the clamping blocks 36 at both ends of the positioning plate 34 are used to clamp the two ends of the metal square tube.

[0048] During the cutting process, the second motor 21 drives the cutting table 23 on the second screw 22 to move in the second limit rod 24 in the front-rear direction, and the position of the cutting table 23 is adjusted to meet the cutting position. The third motor 54 on the cutting side frame 50 drives the cutting plate 51 on the third screw 55 to move horizontally in the third limit rod 56, driving the hydraulic rod 52 and the metal fuse 53 on the cutting plate 51 to adjust the left and right positions. The height of the metal fuse 53 is adjusted by the hydraulic rod 52, and the cutting distance of the square tube is adjusted to achieve cutting of different lengths of square tubes. The cutting adjustment is simple and convenient.

[0049] After cutting, the clamping block 36 in the second positioning block 31 is loosened, and the first motor 72 in the processing table 10 drives the rotating rod 73 to rotate. The rotating rod 73 drives the rotating disk 70 on the top of the motor frame 71 to rotate synchronously through the bearing 91. During the rotation process, the rotating disk 70 pushes the movable plate 65 on the limiting base 64 back and forth through the hinge rod 74, and the movable plate 65 drives the rotating column 60 to move in the U-shaped fixed frame during the back and forth pushing process. The rotating plate 66 drives the rotating column 60 connected to the bearing 91 on the movable plate 65 to rotate through the limiting shaft 67 and the V-shaped flip groove 63, so that the first positioning block 30 connected to the top of the rotating column 60 through the connecting block 39 drives the cut metal square tube body 90 to flip, and drives the square tube body 90 to enter the fan base 13 under the L-shaped base plate 11, and uses the blower 12 to cool the high temperature at the cut of the square tube body 90, so as to avoid the harm of high temperature to the operator and improve the safety performance.

[0050] When the cut square tube 90 is rotated for cooling and unloading, the first bevel gear 41 on the rotating shaft engages to drive the second bevel gear 42 on the motor frame 71 to rotate, and the second bevel gear 42 will make the push block 44 on the movable screw 43 to perform stable reciprocating motion in the T-shaped limit rod 45. During the movement, the push block 44 drives the push plate 40 to push the square tube 90 through the electric telescopic rod 46, so that the top end of the square tube 90 enters the first positioning block 30 again to achieve clamping and fixing, so as to achieve the cutting of the next section of the square tube 90. There is no need for the operator to operate the high-temperature square tube 90, so as to achieve automatic loading and cutting and flipping and cooling after cutting, which is ingeniously designed.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A protective device for cutting a metal square tube, comprising a processing table (10), a cutting base (20) fixed on the processing table (10), a first positioning block (30) for clamping a square tube body (90), and a pushing plate (40) for pushing the square tube body (90), characterized in that: The cutting base (20) is fixedly mounted at the center of one side of the top of the processing table (10) by bolts, a cutting side frame (50) is welded and fixed to one side of the top of the cutting base (20), a cutting plate (51) is movably connected to one side of the cutting side frame (50), a hydraulic rod (52) is fixedly mounted at the center of the top of one side of the cutting plate (51) by bolts, a metal fuse (53) movably mounted on the cutting base (20) is mounted at the bottom end of the hydraulic rod (52), and a flip assembly for flipping the first positioning block (30) is arranged inside the processing table (10), wherein the flip assembly comprises: A rotating column (60) drives the first positioning block (30) to perform horizontal flipping, a support plate (61) is fixedly installed on one side of the bottom of the cutting base (20) in the processing table (10) by bolts, a U-shaped fixing plate (62) is fixedly installed between the tops of the support plates (61) by bolts, a V-shaped flipping groove (63) is provided at the bottom center of the U-shaped fixing plate (62), a limiting base (64) is fixedly installed between the two ends of the top of the U-shaped fixing plate (62) by bolts, and the limiting base (64) is fixedly installed between the two ends of the top of the U-shaped fixing plate (62). A movable plate (65) is movably provided at the top, a bearing (91) is fixedly installed at the center of the movable plate (65) by bolts, the rotating column (60) is fixedly installed at the movable center of the bearing (91) by bolts, a rotating plate (66) is fixedly installed at the bottom end of the rotating column (60) by bolts, a limiting shaft (67) whose size matches the V-shaped flip groove (63) is fixedly installed at the center of one side of the rotating plate (66) by bolts, and the limiting shaft (67) moves in the V-shaped flip groove (63); A rotating disk (70) drives the movable plate (65) to reciprocate back and forth, a motor frame (71) is fixedly installed at the center of one side of the support plate (61) in the processing table (10) by bolts, a first motor (72) is fixedly installed at the bottom side of the motor frame (71) by bolts, the output end of the first motor (72) is connected to a rotating rod (73), the bearing (91) is fixedly installed at the center of the top side of the motor frame (71) by bolts, the top end of the rotating rod (73) penetrates the bearing (91) on the motor frame (71) and extends to the outside, and the top end of the rotating rod (73) is fixedly installed at the bottom center of the rotating disk (70) by bolts, and a hinged rod (74) is movably connected between the top side of the rotating disk (70) and the center of one side of the movable plate (65) through a rotating shaft; The pushing plate (40) drives the square tube body (90) to push, the center of one side of the top of the motor frame (71) is movably connected with a first bevel gear (41) through the bearing (91), and the rotating rod (73) is fixedly installed at the center of the first bevel gear (41) through bolts, and the center of one side of the motor frame (71) is movably connected with a second bevel gear (42) meshing with the first bevel gear (41) through the bearing (91), and a movable screw rod (43) is fixedly installed at the center of one side of the second bevel gear (42) through bolts, and one end of the movable screw rod (43) is threadedly connected with a pushing block (44) connected to the pushing plate (40); An L-shaped base plate (11) for cooling the square tube (90) is fixedly mounted on one end of the top of the processing table (10) by means of bolts, and a blower (12) is fixedly mounted on the center of one side of the top of the L-shaped base plate (11) by means of bolts.

2. A protective device for cutting metal square tubes according to claim 1, characterized in that: A second motor (21) is fixedly mounted at the center of one end of the cutting base (20) by means of bolts, a second screw rod (22) is fixedly mounted at the output end of the second motor (21), a cutting table (23) is threadedly penetrated on the second screw rod (22), a second limiting rod (24) is fixedly mounted on both sides of the second screw rod (22) on the cutting base (20) by means of bolts, two ends of the bottom of the cutting table (23) are movably penetrated in the second limiting rod (24), and the square tube body (90) is movably arranged on the top of the cutting table (23).

3. A protective device for cutting metal square tubes according to claim 2, characterized in that: A third motor (54) is fixedly mounted on one side of the cutting side frame (50) by means of bolts, a third screw rod (55) is fixedly mounted on the output end of the third motor (54), a thread on the second screw rod (22) is connected to the center of one side of the bottom of the cutting plate (51), a third limiting rod (56) is fixedly mounted on both sides of the third screw rod (55) by means of bolts on the cutting side frame (50), the two ends of the bottom of the cutting plate (51) are movably mounted through the third limiting rod (56), and the metal fuse (53) is movably mounted at the top center of the cutting table (23).

4. A protective device for cutting metal square tubes according to claim 1, characterized in that: A fan base (13) with an air outlet is fixedly mounted at the center of one side of the bottom of the L-shaped base plate (11) by means of bolts, and the output end of the blower (12) is connected to the fan base (13) via an arc-shaped conduit (14).

5. The protective device for cutting metal square tubes according to claim 1, characterized in that: A limiting sliding groove (69) is provided at the top center of the limiting base (64), and a limiting sliding block (68) is slidably connected to the limiting sliding groove (69) on the limiting base (64), and one end of the top of the limiting sliding block (68) is fixedly mounted at the center of the two ends of the bottom of the movable plate (65) by bolts.

6. A protective device for cutting metal square tubes according to claim 1, characterized in that: The top end of the rotating column (60) movably penetrates a rotating groove (15) provided on the top of the processing table (10); the first positioning block (30) is installed on the top of the rotating column (60) on one side of the top of the rotating groove (15) via a connecting block (39); and the top of the processing table (10) is connected to a second positioning block (31) corresponding to the first positioning block (30) on the other side of the cutting base (20) via a connecting plate (37); The first positioning block (30) and the second positioning block (31) are each provided with a positioning hole (32) at the center of the top thereof for clamping and positioning the square tube body (90); the first positioning block (30) and the second positioning block (31) are provided with a positioning groove (33) at the center of the top thereof; a positioning plate (34) is movably arranged in the positioning groove (33) of the first positioning block (30) and the second positioning block (31); and the positioning plate (34) and the positioning groove (33) are matched in size; a positioning screw (35) is threadedly penetrated at the center thereof; the top thread of the positioning screw (35) penetrates and extends to the outer side of the top of the first positioning block (30) and the second positioning block (31); and a rotating disk (38) is fixedly installed at the top thereof by bolts; and clamping blocks (36) with sawtooth grooves are fixedly installed at both ends of one side of the bottom of the positioning plate (34) by bolts.

7. A protective device for cutting metal square tubes according to claim 1, characterized in that: The top end of the movable screw rod (43) is connected to an inner end of the processing table (10) through the bearing (91); T-shaped limit rods (45) are fixedly installed in the processing table (10) at the centers of both sides of the movable screw rod (43) by bolts; both ends of the push block (44) are movably inserted into the T-shaped limit rods (45); an electric telescopic rod (46) is fixedly installed at the center of one side of the top of the push block (44) by bolts; and the top end of the electric telescopic rod (46) is fixedly installed at the bottom center of the push plate (40) by bolts.

8. A protective device for cutting metal square tubes according to claim 7, characterized in that: A movable groove (16) having a size matching that of the push plate (40) is provided on the top of the processing table (10) on the other side of the cutting base (20), and the push plate (40) is movable and passes through the movable groove (16).

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