A mold for forming variable-lead spiral blades of a coal mining machine drum

Abstract

The present invention belongs to the technical field of metal stamping dies, and in particular relates to a mold for forming variable-lead spiral blades for a coal mining machine drum, comprising an upper tire seat and a lower tire seat, wherein the lower surface of the upper tire seat is fixedly connected to a first U-shaped seat, the upper surface of the lower tire seat is fixedly connected to a second U-shaped seat, and the lower surface of the first U-shaped seat is fixedly connected to an upper forming tire plate via bolts. The present invention enables the mold for forming variable-lead spiral blades for a coal mining machine drum to have the functions of automatic positioning of arc-shaped metal plates, rebound detection of variable-lead spiral blades, and top-loading. Not only is the positioning accurate, but unqualified variable-lead spiral blades can also be discovered in a timely manner, thereby improving the convenience and efficiency of the mold for producing variable-lead spiral blades for coal mining machine drums, reducing the labor intensity of staff, and ensuring the effectiveness and reliability of the use of variable-lead spiral blades for coal mining machine drums.

Description

Technical Field

[0001] The invention belongs to the technical field of metal stamping dies, and in particular relates to a molding die for a coal mining machine drum with a variable lead spiral blade. Background Art

[0002] The variable lead spiral blade of the shearer drum is a key component of the coal mining machine. Its unique variable lead design can adapt to various working conditions in the coal mining process, significantly improving the coal mining efficiency and transportation effect. It plays a vital role in coal mining operations, effectively ensuring the smooth mining and transportation of coal, and providing strong support for the efficient production of the coal industry. When processing the variable lead spiral blade, the arc-shaped metal plate is first extruded into a variable lead spiral blade with the help of a hydraulic press and a forming jig. For example, the patent authorization announcement number is CN202715727U, which discloses a forming jig for the variable lead spiral blade of the coal mining machine drum, and then multiple such variable lead spiral blades are arranged in a spiral shape and welded to the coal mining machine drum.

[0003] Currently, when using a forming jig for variable-lead spiral blades on a coal mining machine drum for forming, it is necessary to manually place the curved metal plate on the forming jig and perform precise position adjustment to prevent the forming of the variable-lead spiral blade from failing due to positioning errors of the curved metal plate. However, this manual adjustment process is quite time-consuming and labor-intensive, greatly affecting the convenience and efficiency of the forming jig in producing the variable-lead spiral blades for the coal mining machine drum, and also increasing the labor intensity of the workers.

[0004] In addition, the existing molding jig lacks the function of detecting the rebound degree of the variable lead spiral blade components, so the variable lead spiral blade components after molding need to be manually measured by workers with the help of measuring tools. However, the manual measurement process is not only cumbersome, but also prone to large measurement errors, which further affects the convenience and efficiency of the variable lead spiral blade processing, as well as the effect and reliability of the use of the variable lead spiral blades in the coal mining machine drum.

[0005] Therefore, a coal mining machine drum variable lead spiral blade forming jig is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a mold for forming a variable-lead spiral blade of a coal mining machine drum in order to solve the above problems.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a mold for forming a variable-lead spiral blade of a coal mining machine drum, comprising an upper tire seat and a lower tire seat, wherein the lower surface of the upper tire seat is fixedly connected to a first U-shaped seat, and the upper surface of the lower tire seat is fixedly connected to a second U-shaped seat, the lower surface of the first U-shaped seat is fixedly connected to an upper forming tire plate by bolts, and the upper surface of the second U-shaped seat is fixedly connected to a lower forming tire plate by bolts, and both side outer walls of the second U-shaped seat are provided with grooves, and the groove walls of the grooves are fixedly connected to positioning mechanisms;

[0008] A rectangular through hole is opened at the center of the top of the second U-shaped seat, and a variable-lead spiral blade rebound detection mechanism is fixedly connected to the hole wall of the rectangular through hole;

[0009] A U-shaped metal tube is fixedly embedded in the lower surface of the lower tire seat, and both side ends of the U-shaped metal tube pass through the lower tire seat. Both side ends of the U-shaped metal tube are connected to two positioning mechanisms respectively. A branch tube is fixedly connected to the tube wall of the U-shaped metal tube, and the top end of the branch tube passes through the lower tire seat and is connected to the interior of the variable-lead spiral blade rebound detection mechanism;

[0010] Both sides of the U-shaped metal tube are provided with air holes, and the outer sides of the air holes are provided with damping rubber covers, and the damping rubber covers are fixedly connected to the tube wall of the U-shaped metal tube.

[0011] In the above-mentioned coal mining machine drum variable lead spiral blade forming mold, the positioning mechanism includes a cylinder fixedly connected to the slot top groove wall, the side end through hole inner wall of the cylinder is movably connected with a moving rod, the side end of the moving rod located inside the cylinder is fixedly sleeved with a first sealing ring, the first sealing ring is sealingly and slidingly connected to the inner side of the cylinder, the two side ends of the U-shaped metal tube respectively penetrate into the interior of the two cylinders, the end of the moving rod away from the cylinder is fixedly connected with a connecting block, rectangular mounting holes are opened on both sides of the second U-shaped seat, and the hole wall of the rectangular mounting hole is movably connected with a connecting bent plate, the bottom end of the connecting bent plate is fixedly connected to the connecting block, the top of the connecting bent plate is movably connected with an arc positioning plate, and the arc positioning plate is fixedly connected with an auxiliary mechanism.

[0012] In the above-mentioned coal mining machine drum variable lead spiral blade forming jig, the auxiliary mechanism includes an L-shaped rod fixedly connected to the arc-shaped positioning plate, the bottom end of the L-shaped rod passes through the connecting bent plate, and the upper surface of the connecting bent plate is provided with a circular hole that matches the vertical part of the L-shaped rod, the bottom end of the L-shaped rod is fixedly connected to a block, and the vertical part of the L-shaped rod is sleeved with a reset spring.

[0013] In the above-mentioned coal mining machine drum variable lead spiral blade forming mold, the variable lead spiral blade rebound detection mechanism includes a rectangular tube fixedly connected to the inner wall of the rectangular through hole at the top of the second U-shaped seat, the bottom end of the rectangular tube is fixedly connected to the upper surface of the lower tire seat, the top end of the branch pipe is located inside the rectangular tube, the lower tire seat is located on the upper surface inside the rectangular tube and is fixedly connected to a micro electric push rod, the top end of the micro electric push rod is fixedly connected to a connecting plate, the connecting plate is fixedly embedded with a second sealing ring, the second sealing ring is sealingly and slidingly connected to the inner side of the rectangular tube, the lower molding mold Two air vents are provided on the upper surface of the plate, and push rods are provided inside the two air vents. The bottom ends of the push rods are fixedly connected to the upper surface of the connecting plate. A countersunk hole is provided on the upper surface of the connecting plate, and the hole wall of the countersunk hole is sealed and fixedly connected to an air pressure sensor. The bottom end of the data cable of the air pressure sensor is sealed and passes through the outside of the rectangular tube and is electrically connected to a small PLC controller. The output end of the small PLC controller is electrically connected to a warning light through a wire. The bottom end of the warning light is fixedly connected to the upper surface of the lower tire seat, and a trigger component is fixedly connected to the edge of the upper surface of the lower tire seat.

[0014] In the above-mentioned coal mining machine drum variable lead spiral blade forming mold, the trigger assembly includes a positioning rear side plate fixedly connected to the edge of the upper surface of the lower tire seat, the top of the positioning rear side plate is fixedly connected to a press switch, and the lower surface of the upper tire seat is fixedly connected to a press rod which is on the same vertical line as the press switch.

[0015] In the above-mentioned coal mining machine drum variable lead spiral blade forming jig, a sealing ring is fixedly connected to the upper surface of the rectangular cylinder, and the upper surface of the sealing ring and the upper surface of the second U-shaped seat are on the same horizontal plane.

[0016] In the above-mentioned coal mining machine drum variable lead spiral blade forming jig, the bottom end of the upper tire seat is fixedly connected to two positioning guide pillars, and the upper surface of the positioning rear side plate is provided with two positioning guide holes matching with the positioning guide pillars.

[0017] In the above-mentioned coal mining machine drum variable lead spiral blade forming jig, bolt holes are opened on the opposite sides of the first U-shaped seat and the second U-shaped seat, and blind bolt holes are opened on the opposite sides of the upper forming tire plate and the lower forming tire plate.

[0018] Compared with the existing technology, the advantages of a coal mining machine drum variable lead spiral blade forming jig are:

[0019] 1. Through the provided positioning mechanism, variable lead spiral blade rebound detection mechanism and U-shaped metal tube, when the forming jig processes the variable lead spiral blade of the coal mining machine drum, first, part of the air in the rectangular cylinder is pushed into the positioning mechanism through the rebound detection mechanism, the U-shaped metal tube and the micro electric push rod, so that the two arc positioning plates of the positioning mechanism limit the arc metal plate to prevent the arc metal plate from falling from the forming jig, and the two positioning mechanisms are connected by the U-shaped metal tube to form a communicating vessel, and then the two positioning mechanisms can make the arc metal plate be located in the extrusion forming station in the middle of the forming jig, so as to avoid the situation that the forming of the variable lead spiral blade of the coal mining machine drum fails due to the incorrect position of the arc metal plate, and the position of the arc metal plate does not need to be adjusted manually, which saves time and effort. This mechanism enables the forming jig of the variable lead spiral blade of the coal mining machine drum to have the function of automatic positioning of the arc metal plate, and the positioning is accurate, which improves the convenience and efficiency of the forming jig in producing the variable lead spiral blade of the coal mining machine drum, and can reduce the labor intensity of the staff.

[0020] 2. Through the variable lead spiral blade rebound detection mechanism, when the upper forming plate and the lower forming plate extrude the arc-shaped metal plate into a variable lead spiral blade component, the variable lead spiral blade rebound detection mechanism can detect whether the variable lead spiral blade component rebounds, and can timely separate the variable lead spiral blade components that are unqualified due to rebound. This mechanism enables the coal mining machine drum variable lead spiral blade forming jig to have the function of variable lead spiral blade rebound detection, and can timely discover unqualified variable lead spiral blades, and can ensure the effect and reliability of the use of the coal mining machine drum variable lead spiral blade.

[0021] 3. Through the auxiliary mechanism, when the variable lead spiral blade component needs to be taken out after forming, the small PLC controller controls the extension of the micro electric push rod, and the micro electric push rod lifts the variable lead spiral blade component through the push rod. When the variable lead spiral blade component is lifted, the arc positioning plate can be stably limited through the auxiliary mechanism, thereby preventing the lifted variable lead spiral blade component from falling from the molding jig. Then the lifted variable lead spiral blade component can be convenient for the staff to hold and take out the material, avoiding the inconvenience of taking out the material due to the variable lead spiral blade component being close to the lower molding jig. This mechanism enables the molding jig to have the function of lifting the material, thereby improving the convenience and efficiency of taking out the variable lead spiral blade component from the molding jig. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a mold for forming a variable-lead spiral blade of a coal mining machine drum provided by the present invention;

[0023] Figure 2This is a structural schematic diagram of a variable-lead spiral blade rebound detection mechanism in a coal mining machine drum variable-lead spiral blade forming jig provided by the present invention;

[0024] Figure 3 This is a structural schematic diagram of a positioning mechanism in a shearer drum variable-lead spiral blade molding jig provided by the present invention;

[0025] Figure 4 This is a schematic structural diagram of a side view of a trigger assembly in a variable-lead spiral blade forming jig for a coal mining machine drum provided by the present invention;

[0026] Figure 5 This is a structural schematic diagram of a lower forming plate in a forming jig for a shearer drum with a variable lead spiral blade provided by the present invention;

[0027] Figure 6 The present invention provides a schematic structural diagram of a second U-shaped seat in a mold for forming variable-lead spiral blades in a coal mining machine drum.

[0028] In the figure: 1 upper tire seat, 2 lower tire seat, 3 first U-shaped seat, 4 second U-shaped seat, 5 upper molded tire plate, 6 positioning mechanism, 61 cylinder, 62 moving rod, 63 first sealing ring, 64 connecting block, 65 connecting bent plate, 66 arc-shaped positioning plate, 7 variable lead spiral blade rebound detection mechanism, 71 rectangular cylinder, 72 micro electric push rod, 73 connecting plate, 74 second sealing ring, 75 vent, 76 push rod, 77 air pressure sensor, 78 small PLC controller, 79 warning light, 8 auxiliary mechanism, 81 L-shaped rod, 82 block, 83 return spring, 9 trigger assembly, 91 positioning rear side plate, 92 press switch, 93 press rod, 10 lower molded tire plate, 11 U-shaped metal tube, 12 branch pipe, 13 vent, 14 damping rubber cover, 15 sealing ring, 16 positioning guide column, 17 positioning guide hole, 18 bolt hole; 19, slot. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1-6As shown, a coal mining machine drum variable lead spiral blade forming mold includes an upper tire seat 1 and a lower tire seat 2, the lower surface of the upper tire seat 1 is fixedly connected to a first U-shaped seat 3, the upper surface of the lower tire seat 2 is fixedly connected to a second U-shaped seat 4, the lower surface of the first U-shaped seat 3 is fixedly connected to an upper forming tire plate 5 by bolts, the upper surface of the second U-shaped seat 4 is fixedly connected to a lower forming tire plate 10 by bolts, both sides of the second U-shaped seat 4 are provided with slots 19, and the slot wall of the slot 19 is fixedly connected to a positioning mechanism 6, the positioning mechanism 6 includes a cylinder 61 fixedly connected to the top slot wall of the slot 19, the inner wall of the side end through hole of the cylinder 61 is movably connected to a moving rod 62, the side end of the moving rod 62 located inside the cylinder 61 is fixedly sleeved with a first sealing ring 63, and the first sealing ring 63 is fixedly sleeved with the cylinder The inner side of the cylinder 61 is sealed and slidably connected, and the two side ends of the U-shaped metal tube 11 respectively penetrate into the interior of the two cylinders 61, and the end of the moving rod 62 away from the cylinder 61 is fixedly connected to the connecting block 64. Rectangular mounting holes are opened on both sides of the second U-shaped seat 4, and the hole wall of the rectangular mounting hole is movably connected with a connecting bent plate 65. The bottom end of the connecting bent plate 65 is fixedly connected to the connecting block 64, and the top of the connecting bent plate 65 is movably connected with an arc-shaped positioning plate 66. The arc-shaped positioning plate 66 is fixedly connected with an auxiliary mechanism 8. This mechanism enables the coal mining machine drum variable lead spiral blade forming jig to have the function of automatic positioning of the arc metal plate, and the positioning is accurate, which improves the convenience and efficiency of the forming jig in producing the coal mining machine drum variable lead spiral blade, and can reduce the labor intensity of the staff.

[0031] The auxiliary mechanism 8 includes an L-shaped rod 81 fixedly connected to the arc-shaped positioning plate 66. The bottom end of the L-shaped rod 81 passes through the connecting bent plate 65. The upper surface of the connecting bent plate 65 is provided with a circular hole that matches the vertical part of the L-shaped rod 81. The bottom end of the L-shaped rod 81 is fixedly connected to a stop block 82. The vertical part of the L-shaped rod 81 is sleeved with a return spring 83. This mechanism enables the molding mold to have the function of lifting the material, thereby improving the convenience and efficiency of the variable lead spiral blade components in taking the material from the molding mold.

[0032] A rectangular through hole is provided at the center of the top of the second U-shaped seat 4, and a variable-lead spiral blade rebound detection mechanism 7 is fixedly connected to the wall of the rectangular through hole. The variable-lead spiral blade rebound detection mechanism 7 includes a rectangular tube 71 fixedly connected to the inner wall of the rectangular through hole at the top of the second U-shaped seat 4, and a sealing ring 15 is fixedly connected to the upper surface of the rectangular tube 71. The upper surface of the sealing ring 15 is on the same horizontal plane as the upper surface of the second U-shaped seat 4. The sealing ring 15 can ensure the sealing of the top connection of the rectangular tube 71. The bottom end of the rectangular tube 71 is fixedly connected to the upper surface of the lower tire seat 2. The top end of the branch pipe 12 is located inside the rectangular tube 71. The upper surface of the lower tire seat 2 located inside the rectangular tube 71 is fixedly connected to a micro-electric push rod 72. The top end of the micro-electric push rod 72 is fixedly connected to a connecting plate 73. The connecting plate 73 is fixedly embedded with a second sealing ring 74. The second sealing ring 74 is connected to the rectangular tube 71 The inner side of the rectangular tube 71 is sealed and slidably connected. Two ventilation holes 75 are provided on the upper surface of the lower molding tire plate 10. The inside of the two ventilation holes 75 is provided with a push rod 76. The bottom end of the push rod 76 is fixedly connected to the upper surface of the connecting plate 73. The upper surface of the connecting plate 73 is provided with a countersunk hole, and the hole wall of the countersunk hole is sealed and fixedly connected to an air pressure sensor 77. The bottom end of the data line of the air pressure sensor 77 is sealed and passes through the outside of the rectangular tube 71 and is electrically connected to a small PLC controller 78. The output end of the small PLC controller 78 is electrically connected to a warning light 79 through a wire. The bottom end of the warning light 79 is fixedly connected to the upper surface of the lower tire seat 2. This mechanism enables the coal mining machine drum variable lead spiral blade molding mold to have the function of variable lead spiral blade rebound detection, and can promptly detect unqualified variable lead spiral blades, and can ensure the effect and reliability of the use of the coal mining machine drum variable lead spiral blades.

[0033] A trigger assembly 9 is fixedly connected to the edge of the upper surface of the lower tire seat 2, and the trigger assembly 9 includes a positioning rear side plate 91 fixedly connected to the edge of the upper surface of the lower tire seat 2, and a push switch 92 is fixedly connected to the top of the positioning rear side plate 91. A push rod 93 is fixedly connected to the lower surface of the upper tire seat 1 and is on the same vertical line as the push switch 92. The input end of the push switch 92 is electrically connected to the external power supply through a wire, and the output end of the push switch 92 is electrically connected to the input end of the small PLC controller 78 through a wire, and the micro electric push rod 72 is electrically connected to the output end of the small PLC controller 78 through a wire. The electrical connections of the above-mentioned powered equipment are all existing technologies and will not be repeated here.

[0034] A U-shaped metal tube 11 is fixedly embedded in the lower surface of the lower tire seat 2. Air holes 13 are opened on both sides of the U-shaped metal tube 11, and a damping rubber cover 14 is provided on the outside of the air hole 13. The damping rubber cover 14 is fixedly connected to the tube wall of the U-shaped metal tube 11. The damping rubber cover 14 can ensure that the positioning mechanism 6 can be used reliably. Both side ends of the U-shaped metal tube 11 pass through the lower tire seat 2. Both side ends of the U-shaped metal tube 11 are connected to the two positioning mechanisms 6 respectively. The tube wall of the U-shaped metal tube 11 is fixedly connected with a branch pipe 12. The top end of the branch pipe 12 passes through the lower tire seat 2 and is connected to the inside of the variable lead spiral blade rebound detection mechanism 7.

[0035] The bottom end of the upper tire seat 1 is fixedly connected to two positioning guide pillars 16, and the upper surface of the positioning rear side plate 91 is provided with two positioning guide holes 17 that cooperate with the positioning guide pillars 16. The positioning guide pillars 16 are connected in the positioning guide holes 17 of the positioning rear side plate 91, which can ensure that the molding mold will not be offset to the left and right during molding processing. Bolt holes 18 are provided on the opposite sides of the first U-shaped seat 3 and the second U-shaped seat 4, and blind bolt holes are provided on the opposite sides of the upper molding tire plate 5 and the lower molding tire plate 10. The bolt holes 18 can facilitate the replacement of the worn upper molding tire plate 5 and the lower molding tire plate 10, thereby ensuring the quality of the molding mold processing.

[0036] The operating principle of the present invention is described as follows: When the forming jig is used to process the variable lead spiral blade of the shearer drum, the upper tire seat 1 and the lower tire seat 2 are first installed on the hydraulic press by bolts, and then the upper forming tire plate 5 is installed on the first U-shaped seat 3 of the upper tire seat 1 through the bolts and bolt holes 18. At the same time, the lower forming tire plate 10 is installed on the second U-shaped seat 4 of the lower tire seat 2, and the positioning guide column 16 is connected to the positioning guide hole 17 of the positioning rear side plate 91 to ensure that the forming jig will not deviate left and right during the forming process. Then the staff puts the arc-shaped metal jig for producing the variable lead spiral blade of the shearer drum into the jig. The plate is placed on the lower forming tire plate 10. At this time, the forming mold is in the open state, and the small PLC controller 78 controls the micro electric push rod 72 to retract half. During this process, the micro electric push rod 72 drives the connecting plate 73 to move downward, and the connecting plate 73 drives the push rod 76 to move downward, and the top of the push rod 76 is retracted into the inside of the vent 75 to prevent the push rod 76 from extending out of the vent 75 to interfere with the extrusion molding of the arc metal plate. At the same time, the connecting plate 73 drives the second sealing ring 74 to move downward, which will push part of the air in the rectangular cylinder 71 through the branch pipe 12 and the U-shaped metal tube 11 into the two cylinders 61. The cylinder 61 After the air is filled, the first sealing ring 63 is used to push the moving rod 62 outward, and the moving rod 62 pushes the two arc-shaped positioning plates 66 to approach each other through the connecting block 64 and the connecting bent plate 65. The two arc-shaped positioning plates 66 that are close to each other cooperate with the positioning rear side plate 91 to automatically limit the arc-shaped metal plate to prevent the arc-shaped metal plate from falling from the forming jig. At this time, the clamping force of the two positioning mechanisms 6 on the arc-shaped metal plate is much smaller than the extrusion force of the hydraulic press to push the forming jig to close, so that it will not affect the normal extrusion molding of the arc-shaped metal plate in the forming jig, and can also automatically correct the position of the arc-shaped metal plate because the two positioning mechanisms 6 will form a communicating vessel after being connected by the U-shaped metal tube 11. Through the two positioning mechanisms 6, the arc-shaped metal plate can be placed in the extrusion molding station in the middle of the molding jig, avoiding the situation where the arc-shaped metal plate is positioned incorrectly and the molding of the coal mining machine drum variable lead spiral blade fails. Moreover, the position of the arc-shaped metal plate does not need to be adjusted manually, which saves time and effort. This mechanism enables the coal mining machine drum variable lead spiral blade molding jig to have the function of automatic positioning of the arc-shaped metal plate, and the positioning is accurate, which improves the convenience and efficiency of the molding jig in producing the coal mining machine drum variable lead spiral blade, and can reduce the labor intensity of the staff.

[0037] When the upper molding tire plate 5 and the lower molding tire plate 10 extrude the arc-shaped metal plate into a variable lead spiral blade component, the upper tire seat 1 moves downward and causes the pressing rod 93 to squeeze the pressing switch 92. The pressing switch 92 is energized to send an electrical signal to the small PLC controller 78. The small PLC controller 78 controls the micro electric push rod 72 to fully retract after a delay of 5 seconds according to the electrical signal. Within the 5 seconds, the upper molding tire plate 5 that has been extruded is driven to rise and separate from the top of the variable lead spiral blade component. At the same time, the variable lead spiral blade component is clamped on both sides by the positioning mechanism 6 and will not be separated from the lower molding tire plate. The plate 10 is separated. If the variable-lead spiral blade component does not rebound after extrusion molding, the bottom of the variable-lead spiral blade component is in contact with the upper surface of the lower molded tire plate 10 and has a sealing effect. The vent 75 is not connected to the outside world. Then, after 5 seconds, the small PLC controller 78 controls the micro electric push rod 72 to fully retract. The micro electric push rod 72 drives the connecting plate 73 and the second sealing ring 15 to continue to move downward. The vent 75 cannot draw air from the outside to compensate, resulting in a negative pressure environment in the cavity at the top of the rectangular cylinder 71 and the vent 75, and the air pressure sensor 77 can send a signal to the small PLC controller 78. The corresponding electrical signal is sent, and the air pressure detected by the air pressure sensor 77 reaches the air pressure threshold preset by the small PLC controller 78. Then the small PLC controller 78 controls the prompt light 79 to light up to remind that the variable lead spiral blade parts are processed qualified. While the micro electric push rod 72 drives the connecting plate 73 and the second sealing ring 15 to move downward, the air at the bottom of the rectangular cylinder 71 continues to enter the U-shaped metal tube 11 through the branch pipe 12 and expands the damping rubber cover 14 through the air vent 13. On the contrary, if the variable lead spiral blade parts rebound after extrusion molding, at this time the bottom of the variable lead spiral blade parts and the lower molding tire plate 10 are in contact. The upper surface is not in contact and has no sealing effect. The vent 75 is connected to the outside world. After 5 seconds, the air pressure detected by the air pressure sensor 77 does not reach the air pressure threshold preset by the small PLC controller 78. After that, the small PLC controller 78 does not control the prompt light 79 to light up. Finally, the staff takes out the unqualified variable lead spiral blade component. This mechanism enables the coal mining machine drum variable lead spiral blade molding jig to have the function of variable lead spiral blade rebound detection, and can timely detect unqualified variable lead spiral blades, and can ensure the effect and reliability of the use of the coal mining machine drum variable lead spiral blades.

[0038] After the variable lead spiral blade component is rebounded, the small PLC controller 78 controls the micro electric push rod 72 to extend. The micro electric push rod 72 drives the push rod 76 to extend out of the vent hole 75 through the connecting plate 73. The push rod 76 lifts the variable lead spiral blade component. When the variable lead spiral blade component is lifted, the arc positioning plate 66 squeezes the return spring 83 through the L-shaped rod 81 and the block 82, and compresses the return spring 83 to store energy. The arc positioning plate 66 can also move upward through the L-shaped rod 81, and because the bulging damping rubber cover 14 contracts to compensate for the air inside the rectangular cylinder 71, the positioning mechanism 6 The arc-shaped positioning plate 66 is not separated from the variable-lead spiral blade component. The arc-shaped positioning plate 66 is still arranged on both sides of the variable-lead spiral blade component, continuously limiting the two sides of the variable-lead spiral blade component, thereby preventing the lifted variable-lead spiral blade component from falling from the molding jig. Then the lifted variable-lead spiral blade component can be convenient for the staff to hold and take the material, avoiding the inconvenience of taking the material due to the variable-lead spiral blade component being close to the lower molding jig 10. This mechanism enables the molding jig to have the function of lifting the material, thereby improving the convenience and efficiency of the variable-lead spiral blade component in taking the material from the molding jig.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold for forming a variable-lead spiral blade of a coal mining machine drum, comprising an upper tire seat (1) and a lower tire seat (2), characterized in that: The lower surface of the upper tire seat (1) is fixedly connected to a first U-shaped seat (3), the upper surface of the lower tire seat (2) is fixedly connected to a second U-shaped seat (4), the lower surface of the first U-shaped seat (3) is fixedly connected to an upper molded tire plate (5) by bolts, the upper surface of the second U-shaped seat (4) is fixedly connected to a lower molded tire plate (10) by bolts, both sides of the second U-shaped seat (4) are provided with slots (19), and the slot walls of the slots (19) are fixedly connected to a positioning mechanism (6); A rectangular through hole is provided at the center of the top of the second U-shaped seat (4), and a variable-lead spiral blade rebound detection mechanism (7) is fixedly connected to the hole wall of the rectangular through hole; A U-shaped metal tube (11) is fixedly embedded in the lower surface of the lower tire seat (2), and both side ends of the U-shaped metal tube (11) pass through the lower tire seat (2). Both side ends of the U-shaped metal tube (11) are respectively connected to two positioning mechanisms (6). A branch tube (12) is fixedly connected to the tube wall of the U-shaped metal tube (11), and the top end of the branch tube (12) passes through the lower tire seat (2) and is connected to the inside of the variable-lead spiral blade rebound detection mechanism (7); Both sides of the U-shaped metal tube (11) are provided with air holes (13), and a damping rubber cover (14) is provided on the outside of the air holes (13), and the damping rubber cover (14) is fixedly connected to the tube wall of the U-shaped metal tube (11); The positioning mechanism (6) comprises a cylinder (61) fixedly connected to the top groove wall of the slot (19), the inner wall of the side through hole of the cylinder (61) is movably connected with a moving rod (62), the side end of the moving rod (62) located inside the cylinder (61) is fixedly sleeved with a first sealing ring (63), the first sealing ring (63) is sealingly and slidingly connected to the inner side of the cylinder (61), the two side ends of the U-shaped metal tube (11) respectively penetrate into the interior of the two cylinders (61), the end of the moving rod (62) away from the cylinder (61) is fixedly connected with a connecting block (64), both sides of the second U-shaped seat (4) are provided with rectangular mounting holes, and the hole wall of the rectangular mounting hole is movably connected with a connecting bent plate (65), the bottom end of the connecting bent plate (65) is fixedly connected to the connecting block (64), the top end of the connecting bent plate (65) is movably connected with an arc-shaped positioning plate (66), and the arc-shaped positioning plate (66) is fixedly connected with an auxiliary mechanism (8); The variable-lead spiral blade rebound detection mechanism (7) comprises a rectangular tube (71) fixedly connected to the inner wall of the rectangular through hole at the top of the second U-shaped seat (4); the bottom end of the rectangular tube (71) is fixedly connected to the upper surface of the lower tire seat (2); the top end of the branch pipe (12) is located inside the rectangular tube (71); the upper surface of the lower tire seat (2) located inside the rectangular tube (71) is fixedly connected to a micro electric push rod (72); the top end of the micro electric push rod (72) is fixedly connected to a connecting plate (73); the connecting plate (73) is fixedly embedded with a second sealing ring (74); the second sealing ring (74) is sealingly and slidingly connected to the inner side of the rectangular tube (71); the upper surface of the lower molded tire plate (10) is provided with two through holes. The air holes (75) are each provided with a push rod (76) inside, the bottom end of the push rod (76) is fixedly connected to the upper surface of the connecting plate (73), the upper surface of the connecting plate (73) is provided with a countersunk hole, and the hole wall of the countersunk hole is sealed and fixedly connected to an air pressure sensor (77), the bottom end of the data line of the air pressure sensor (77) is sealed and passes through the outside of the rectangular tube (71), and is electrically connected to a small PLC controller (78), the output end of the small PLC controller (78) is electrically connected to a warning light (79) through a wire, the bottom end of the warning light (79) is fixedly connected to the upper surface of the lower tire seat (2), and the edge of the upper surface of the lower tire seat (2) is fixedly connected to a trigger component (9).

2. A mold for forming a variable-lead spiral blade for a coal mining machine drum according to claim 1, characterized in that: The auxiliary mechanism (8) includes an L-shaped rod (81) fixedly connected to the arc-shaped positioning plate (66), the bottom end of the L-shaped rod (81) passes through the connecting bent plate (65), the upper surface of the connecting bent plate (65) is provided with a circular hole that matches the vertical portion of the L-shaped rod (81), the bottom end of the L-shaped rod (81) is fixedly connected to a stopper (82), and the vertical portion of the L-shaped rod (81) is sleeved with a return spring (83).

3. A mold for forming a variable-lead spiral blade for a coal mining machine drum according to claim 1, characterized in that: The trigger assembly (9) comprises a positioning rear side plate (91) fixedly connected to the edge of the upper surface of the lower tire seat (2), a top end of the positioning rear side plate (91) is fixedly connected to a press switch (92), and a lower surface of the upper tire seat (1) is fixedly connected to a press rod (93) on the same vertical line as the press switch (92).

4. A mold for forming a variable-lead spiral blade for a coal mining machine drum according to claim 1, characterized in that: A sealing ring (15) is fixedly connected to the upper surface of the rectangular cylinder (71), and the upper surface of the sealing ring (15) and the upper surface of the second U-shaped seat (4) are on the same horizontal plane.

5. A mold for forming a variable-lead spiral blade for a coal mining machine drum according to claim 3, characterized in that: The bottom end of the upper tire seat (1) is fixedly connected to two positioning guide pillars (16), and the upper surface of the positioning rear side plate (91) is provided with two positioning guide holes (17) that match the positioning guide pillars (16).

6. A mold for forming a variable-lead spiral blade for a coal mining machine drum according to claim 1, characterized in that: The first U-shaped seat (3) and the second U-shaped seat (4) are both provided with bolt holes (18) on opposite sides, and the upper molded tire plate (5) and the lower molded tire plate (10) are both provided with blind bolt holes on opposite sides.

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