A new tire mold drilling machine

Abstract

The utility model relates to tire mould drilling technical field, concretely relates to a novel tire mould drilling machine, include: operation frame, the inner bottom wall of operation frame is seted up and placed the groove, thick and thin wall detection mechanism sets up in the placement groove, thick and thin wall detection mechanism includes the flexible water bag ring for containing heated water, the inner bottom wall of placement groove is connected with the bottom of flexible water bag ring and slides, the inner peripheral wall of flexible water bag ring is provided with heating plate. Through thick and thin wall detection mechanism utilize flexible water bag ring to be heated by heating plate, elastic gasbag extrusion is attached in tire mould inner wall (including pattern groove), carries out heating to mould, subsequently PTC thermistor contacts mould, because thick wall area heat is less, thin wall area heat is high, PTC thermistor is different because of heat and resistance is different, and PLC controller calculates the part thickness through the detection of electric quantity.

Description

Technical Field

[0001] This utility model relates to the field of tire mold drilling technology, specifically to a novel tire mold drilling machine. Background Technology

[0002] A tire mold is a tool used in tire manufacturing. It precisely shapes and structures various tire components to meet specific requirements in terms of size, shape, and tread pattern during tire production. The main function of a tire mold is to shape the rubber material within the mold during the tire vulcanization process, giving the tire its specific appearance and properties. To ensure proper tire molding, the tire mold is typically drilled during production for the following reasons:

[0003] In the high-temperature environment of tire vulcanization, the channels formed by drilling can be used for cooling, preventing the mold temperature from being too high and causing uneven rubber vulcanization. At the same time, air is mixed in when rubber is injected into the mold during vulcanization, and the drilling, as an vent, allows the air to be discharged smoothly, preventing problems such as air bubbles and insufficient rubber in the tire. In addition, drilling can also provide installation positions for auxiliary devices such as temperature sensors and heating rods, thereby achieving precise control of the vulcanization process. For example, a new type of tire mold drilling machine disclosed in application number CN202010792942.3 is used for drilling tire molds.

[0004] Existing tire mold drilling machines typically use a consistent rotation speed and pressure when drilling tire molds. However, to ensure the tire tread pattern is integrated with the tire, tire molds usually have uneven treads on their inner walls. During drilling, holes may be drilled in thick-walled or thin-walled areas. Thin-walled areas are relatively weak, and under the same drilling pressure, their limited ability to resist external forces makes them prone to elastic or even plastic deformation due to the cutting force generated during drilling. Thick-walled areas require the drill bit to penetrate more material. Therefore, using the same rotation speed and pressure may result in more time being spent drilling in thick-walled areas, ultimately affecting work efficiency. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a novel tire mold drilling machine that effectively solves the problem that existing technologies cannot adaptively adjust drilling speed and force according to the thickness of thick-walled and thin-walled regions.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a novel tire mold drilling machine, comprising:

[0008] An operation frame, wherein a placement groove is provided on the inner bottom wall of the operation frame;

[0009] A wall thickness detection mechanism is provided in a placement groove. The wall thickness detection mechanism includes a flexible water bag ring for holding heated water. The bottom end of the flexible water bag ring is slidably connected to the inner bottom wall of the placement groove. A heating plate is provided on the inner peripheral wall of the flexible water bag ring. An elastic air bladder for squeezing the flexible water bag ring is provided at the top end of the placement groove.

[0010] An adaptive drilling mechanism, comprising a first motor as a drive source, wherein a drill rod for drilling is detachably fixed to the output end of the first motor;

[0011] A drill bit monitoring and replacement mechanism includes a varistor for detecting the drilling status of the drill bit. The outer wall of the varistor is fixedly connected to the outer wall of a first motor. An installation cylinder is fixedly connected to the output end of the first motor for fixing the drill rod.

[0012] Preferably, it also includes a drilling adjustment mechanism, which includes a multi-stage electric telescopic rod fixedly connected to the inner top wall of the operating frame. The telescopic end of the multi-stage electric telescopic rod is fixedly connected to a connecting circular plate. The bottom end of the connecting circular plate is provided with multiple sets of circumferential array sliding limit structures, and each set of sliding limit structures is composed of two parallel sliding grooves. The inner wall of each sliding groove is slidably connected to a sliding plate, and the bottom ends of the two adjacent sliding plates are fixedly connected to an adjustment block.

[0013] Preferably, the bottom end of the connecting circular plate is fixedly connected to a plurality of load-bearing plates that contact the adjusting block, and the load-bearing plates are fixedly connected to a first electric telescopic rod at the center position of the connecting circular plate. The telescopic end of the first electric telescopic rod is fixedly connected to a push plate, the bottom end of the push plate is fixedly connected to the top end of the adjusting block, and the center of the connecting circular plate is fixedly connected to an elastic electromagnetic compression rod.

[0014] Preferably, the thickness and thinness detection mechanism further includes an operating platform fixedly connected to the bottom of the operating frame, an exhaust pump fixedly connected to the bottom of the operating platform, an air outlet pipe fixedly connected to the output end of the exhaust pump, and the other end of the air outlet pipe fixedly connected to the inside of the elastic airbag. The outer wall of the elastic airbag is in intermittent contact with the inner peripheral wall of the flexible water bag ring.

[0015] Preferably, the adaptive drilling mechanism includes a rotating groove at the bottom of the adjusting block, a second motor is fixedly connected to the outer wall of the adjusting block, a rotating shaft is fixedly connected to the output end of the second motor, a rotating block is fixedly connected to the outer wall of the rotating shaft, a PTC thermistor is fixedly connected to one side of the rotating block, and a first motor is fixedly connected to the other side of the rotating block. The PTC thermistor, the first motor, and the first electric telescopic rod are electrically connected to a PLC controller to form an adaptive drilling circuit.

[0016] Preferably, the drill bit monitoring and replacement mechanism further includes a miniature electric telescopic rod fixedly connected to the inner wall of the mounting cylinder. The telescopic end of the miniature electric telescopic rod has a storage groove, and the inner wall of the storage groove is provided with an annular liquid bag containing magnetorheological fluid. The telescopic end of the miniature electric telescopic rod has two placement cavities located on both sides of the storage groove. The two placement cavities respectively contain an N-level electromagnet and an S-level electromagnet. The PLC controller is electrically connected to the miniature electric telescopic rod, the N-level electromagnet, the S-level electromagnet, and the varistor to form a replacement circuit.

[0017] Preferably, the inner wall of the mounting cylinder is elastically hinged with multiple circumferentially arrayed compression anti-slip pads; the outer wall of the telescopic end of the miniature electric telescopic rod is fixedly connected to a connecting ring; the outer wall of the connecting ring is fixedly connected to a frustum compression ring; the inner wall of the frustum compression ring slides in contact with the outer walls of the multiple compression anti-slip pads; the outer peripheral wall of the drill rod is fixedly connected to multiple anti-rotation plates; the inner peripheral wall of the annular liquid bag and the outer wall of the drill rod are in contact with the multiple anti-rotation plates; the inner sides of the multiple compression anti-slip pads are in contact with the outer wall of the drill rod; and the PLC controller is electrically connected to the heating plate, the second motor, the first electric telescopic rod, and the exhaust pump to form a starting circuit.

[0018] Preferably, the system further includes a cleaning mechanism, which includes a storage cavity inside the adjusting block. The inner circumferential wall of the rotating groove has a rotating groove communicating with the storage cavity. An air inlet hood is airtightly rotatably connected to the inner wall of the rotating groove. An air pump is fixedly connected to the top of the rotating block. An exhaust pipe is fixedly connected to the air outlet of the air pump. The other end of the exhaust pipe is fixedly connected to the inside of the air inlet hood. An exhaust pipe is fixedly connected to the exhaust end of the air pump. An annular exhaust hood is fixedly connected to the other end of the exhaust pipe. The outer wall of the annular exhaust hood is fixedly connected to the outer wall of the mounting cylinder. An elastic rubber ring is fixedly connected to the outer wall of the exhaust port of the annular exhaust hood. The PLC controller is electrically connected to the air pump to form a cleaning circuit.

[0019] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0020] 1. The thick / thin wall detection mechanism utilizes a flexible water bag ring heated by a heating plate and an elastic airbag squeezed and attached to the inner wall of the tire mold (including the tread groove) to heat the mold. Subsequently, a PTC thermistor contacts the mold. Due to the lower heat in the thick-walled area and the higher heat in the thin-walled area, the resistance of the PTC thermistor varies with the heat. The PLC controller calculates the thickness of the part by detecting the current. Then, the adaptive drilling mechanism, based on the detected thickness, uses the PLC controller to control the speed of the first motor and the extension speed of the first electric telescopic rod, thereby adjusting the drilling speed and pressure. This effectively avoids damage to the thin-walled area due to excessive force, while improving the drilling efficiency in the thin-walled area. For the thick-walled area, the drilling speed and pressure can be reasonably controlled while ensuring drilling quality, thus improving overall work efficiency.

[0021] 2. The drill bit monitoring and replacement mechanism detects the drilling status of the drill bit through a piezoresistor. When the drill rod wears down, reducing drilling efficiency or causing inconsistency between pressure and depth, the pressure is transmitted to the piezoresistor. When the current flowing through the piezoresistor reaches a preset value, the PLC control unit resets and alarms. When replacing the drill bit, the N-class and S-class electromagnets are first de-energized, causing the magnetorheological fluid to become liquid. The miniature electric telescopic rod retracts, causing the frustum-shaped extrusion ring to loosen the drill rod, allowing the old rod to be pulled out and the new rod to be inserted. Then, the power is restored, causing the magnetorheological fluid to become solid, fixing the drill rod. The electric telescopic rod drives the frustum-shaped extrusion ring to press against the anti-slip pad, causing the motor to drive the drill rod to rotate. This allows for quick fixing of the drill rod, effectively improving the operational stability and production efficiency of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the operating table of this utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the internal parts of this utility model. Figure 1 ;

[0027] Figure 5 This is a three-dimensional structural diagram of the extrusion plate of this utility model;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the internal parts of this utility model. Figure 2 ;

[0029] Figure 7 This is a three-dimensional cross-sectional structural diagram of the mounting cylinder of this utility model;

[0030] Figure 8 This is a three-dimensional structural diagram of the top of the miniature electric telescopic pole of this utility model;

[0031] Figure 9 This is a schematic diagram of the three-dimensional structure of the drill rod of this utility model.

[0032] Reference numerals: 1. Operating frame; 2. Placement slot; 3. Thick / thin wall detection mechanism; 31. Flexible water bag ring; 32. Heating plate; 33. Elastic airbag; 34. Operating table; 35. Exhaust pump; 4. Adaptive drilling mechanism; 41. First motor; 42. Drill rod; 43. Rotating slot; 44. Second motor; 45. Rotating shaft; 46. Rotating block; 47. PTC thermistor; 5. Drill bit monitoring and replacement mechanism; 51. Varistor; 52. Mounting cylinder; 53. Miniature electric telescopic rod; 54. Storage slot; 55. Annular liquid bag; 56. Placement cavity; 57. N-level 58. Electromagnet; 59. S-class electromagnet; 510. Extrusion anti-slip pad; 511. Connecting ring; 512. Frustum extrusion ring; 513. Anti-rotation plate; 6. Drilling adjustment mechanism; 61. Multi-stage electric telescopic rod; 62. Connecting circular plate; 63. Sliding groove; 64. Sliding plate; 65. Adjusting block; 66. Load-bearing plate; 67. First electric telescopic rod; 68. Push plate; 69. Elastic electromagnetic extrusion rod; 70. Cleaning mechanism; 71. Elastic rubber ring; 72. Rotating groove; 73. Air inlet hood; 74. Air pump; 75. Exhaust pipe; 76. Exhaust pipe; 77. Annular exhaust hood. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] The present invention will be further described below with reference to the embodiments.

[0035] Example: Refer to Figures 1 to 9 A novel tire mold drilling machine, comprising:

[0036] The operation frame 1 has a placement groove 2 on its inner bottom wall, and a thickness and thinness detection mechanism 3 is installed in the placement groove 2.

[0037] The thickness of the tire mold at different locations is measured using the following specific structure, for reference. Figure 3 The wall thickness detection mechanism 3 is located in the placement groove 2. The wall thickness detection mechanism 3 includes a flexible water bag ring 31 for holding heated water. The bottom end of the flexible water bag ring 31 is slidably connected to the inner bottom wall of the placement groove 2. A heating plate 32 is provided on the inner peripheral wall of the flexible water bag ring 31. An elastic air bladder 33 for squeezing the flexible water bag ring 31 is provided on the top end of the placement groove 2. The wall thickness detection mechanism 3 also includes an operating table 34 fixedly connected to the bottom end of the operating frame 1. A blower 35 is fixedly connected to the bottom end of the operating table 34. An air outlet pipe is fixedly connected to the output end of the blower 35. The other end of the air outlet pipe is fixedly connected to the inside of the elastic air bladder 33. The outer wall of the elastic air bladder 33 is in intermittent contact with the inner peripheral wall of the flexible water bag ring 31.

[0038] The adaptive drilling mechanism 4 adjusts the drilling speed according to the thickness of the tire mold, referring to... Figure 4 , Figure 6 The adaptive drilling mechanism 4 includes a first motor 41 as a drive source, and a drill rod 42 for drilling is detachably fixed to the output end of the first motor 41. The adaptive drilling mechanism 4 includes a rotating groove 43 opened at the bottom end of the adjusting block 65, a second motor 44 fixedly connected to the outer wall of the adjusting block 65, a rotating shaft 45 fixedly connected to the output end of the second motor 44, a rotating block 46 fixedly connected to the outer wall of the rotating shaft 45, a PTC thermistor 47 fixedly connected to one side of the rotating block 46, and the other side of the rotating block 46 fixedly connected to the first motor 41. The PTC thermistor 47, the first motor 41, and the first electric telescopic rod 67 are electrically connected to a PLC controller and form an adaptive drilling circuit.

[0039] Drilling speeds can be relatively faster in thin-walled areas because there is less material in these areas, resulting in slower heat buildup. For example, if the thickness of the thin-walled area of ​​the mold is 3-5mm, the drilling speed can reach approximately 100-150mm per minute under suitable drill bit and equipment conditions (the specific speed varies depending on factors such as mold material and drill bit material). Faster drilling speeds help improve production efficiency and reduce processing time. The drilling pressure required for thin-walled areas is relatively low. Due to the thin material, lower pressure is sufficient for the drill bit to penetrate the material. Excessive pressure may cause deformation or cracking of the thin-walled area. Generally, the drilling pressure can be controlled at around 0.5-1.5MPa. This pressure range can effectively prevent damage to the thin-walled area due to excessive stress.

[0040] Drilling speeds for thick-walled areas are typically slower because the thicker walls contain more material, making it harder for heat generated during drilling to dissipate. This heat buildup can affect the lifespan of the drill bit and the drilling quality. For example, for thick-walled areas of 20-30mm, the drilling speed may be reduced to around 30-80mm per minute. Thick-walled areas require higher drilling pressure. Due to the greater material thickness, sufficient pressure is needed to push the drill bit through the material. Generally, the pressure may be around 2-5MPa. However, care must be taken not to exceed the pressure limit, as this could cause stress concentration inside the mold and affect its overall performance.

[0041] The drill bit monitoring and replacement mechanism 5 monitors the drilling status of the drill bit in real time, referring to... Figures 6 to 8 The drill bit monitoring and replacement mechanism 5 includes a piezoresistive resistor 51 for detecting the drilling status of the drill bit. The outer wall of the piezoresistive resistor 51 is fixedly connected to the outer wall of the first motor 41. The output end of the first motor 41 is fixedly connected to a mounting cylinder 52, which is used to fix the drill rod 42. The PTC thermistor 47 is on the same axis as the drill rod 42. The PTC (positive temperature coefficient) thermistor 47 is existing technology and will not be described in detail here.

[0042] The following structure facilitates drill bit replacement; see reference. Figures 6 to 8 The drill bit monitoring and replacement mechanism 5 also includes a miniature electric telescopic rod 53 fixedly connected to the inner wall of the mounting cylinder 52. The telescopic end of the miniature electric telescopic rod 53 is provided with a storage groove 54. The inner wall of the storage groove 54 is provided with an annular liquid bag 55, and the annular liquid bag 55 is provided with magnetorheological fluid. The telescopic end of the miniature electric telescopic rod 53 is provided with two placement cavities 56 located on both sides of the storage groove 54. The two placement cavities 56 respectively contain an N-level electromagnet 57 and an S-level electromagnet 58. The PLC controller is electrically connected to the miniature electric telescopic rod 53, the N-level electromagnet 57, the S-level electromagnet 58, and the varistor 51 to form a replacement circuit.

[0043] When no external magnetic field is applied, the magnetic particles in the magnetorheological fluid are randomly distributed. When the N-class electromagnet 57 and the S-class electromagnet 58 are energized to generate a magnetic field, the magnetizable magnetic particles will be magnetized and arranged in a chain or columnar structure along the direction of the magnetic field lines. This causes changes in the interaction between particles, increasing the friction and interaction forces. From a macroscopic perspective, its rheological properties change from liquid to solid. It can withstand shear forces and maintain its shape. Moreover, this transformation is reversible. After the magnetic field disappears, the magnetorheological fluid returns to its liquid state.

[0044] The inner wall of the mounting cylinder 52 is elastically hinged with multiple circumferentially arranged compression anti-slip pads 59. The outer wall of the telescopic end of the miniature electric telescopic rod 53 is fixedly connected with a connecting ring 510. The outer wall of the connecting ring 510 is fixedly connected with a frustum compression ring 511. The inner wall of the frustum compression ring 511 slides in contact with the outer wall of the multiple compression anti-slip pads 59. The outer peripheral wall of the drill rod 42 is fixedly connected with multiple anti-rotation plates 512. The inner peripheral wall of the annular liquid bag 55 is in contact with the outer wall of the drill rod 42 and the multiple anti-rotation plates 512. The inner side of the multiple compression anti-slip pads 59 is in contact with the outer wall of the drill rod 42. The PLC controller is electrically connected to the heating plate 32, the second motor 44, the first electric telescopic rod 67, and the exhaust pump 35 to form a starting circuit.

[0045] It also includes a drilling adjustment mechanism 6, which includes a multi-stage electric telescopic rod 61 fixedly connected to the inner top wall of the operating frame 1. The telescopic end of the multi-stage electric telescopic rod 61 is fixedly connected to a connecting circular plate 62. The bottom end of the connecting circular plate 62 is provided with multiple sets of circumferential array sliding limit structures, and each set of sliding limit structures is composed of two parallel sliding grooves 63. The inner wall of each sliding groove 63 is slidably connected to a sliding plate 64, and the bottom ends of the two adjacent sliding plates 64 are fixedly connected to an adjustment block 65.

[0046] Multiple load-bearing plates 66 that contact the adjusting block 65 are fixedly connected to the bottom end of the connecting circular plate 62. A first electric telescopic rod 67 is fixedly connected to the load-bearing plate 66 facing the center of the connecting circular plate 62. A push plate 68 is fixedly connected to the telescopic end of the first electric telescopic rod 67. The bottom end of the push plate 68 is fixedly connected to the top end of the adjusting block 65. An elastic electromagnetic compression rod 69 is fixedly connected to the center of the connecting circular plate 62. The elastic electromagnetic compression rod 69 will automatically pop out its telescopic end after power is cut off.

[0047] The cleaning mechanism 7 cleans up the drilling debris in real time, referring to... Figure 4 , Figure 6 The cleaning mechanism 7 includes a storage cavity inside the adjusting block 65. The inner circumferential wall of the rotating groove 43 is provided with a rotating groove 72 that communicates with the storage cavity. The inner wall of the rotating groove 72 is airtightly rotatably connected to an air inlet hood 73. The top of the rotating block 46 is fixedly connected to an air pump 74. The air outlet of the air pump 74 is fixedly connected to an exhaust pipe 75. The other end of the exhaust pipe 75 is fixedly connected to the inside of the air inlet hood 73. The exhaust end of the air pump 74 is fixedly connected to an exhaust pipe 76. The other end of the exhaust pipe 76 is fixedly connected to an annular exhaust hood 77. The outer wall of the annular exhaust hood 77 is fixedly connected to the outer wall of the mounting cylinder 52. An elastic rubber ring 71 is fixedly connected to the outer wall of the exhaust port of the annular exhaust hood 77. The PLC controller is electrically connected to the air pump 74 to form a cleaning circuit.

[0048] The working principle of this utility model is as follows:

[0049] First, place the tire mold that needs to be drilled into the placement groove 2. Then, change the drill bit according to the required hole diameter. Turn on the heating plate 32 and stop energizing the elastic electromagnetic extrusion rod 69. The elastic electromagnetic extrusion rod 69 is pressed against the top of the tire mold by its telescopic end. The water in the flexible water bag ring 31 is heated by the heating plate 32. At the same time, the exhaust pump 35 is turned on to inflate the elastic air bag 33, thereby squeezing the flexible water bag ring 31 so that the flexible water bag ring 31 is completely attached to the inner wall of the tire mold, including the tread grooves of the tire inner wall. The inner wall of the tire mold is heated by the heated water for 10 minutes.

[0050] During this process, the multi-stage electric telescopic rod 61 is activated, which pushes the connecting circular plate 62 downward. The moving distance is adjusted in real time according to the drilling position of the tire mold as needed (data can be directly input into the PLC controller). The second motor 44 drives the rotating shaft 45 to rotate 180 degrees, which in turn causes the rotating block 46 to move the PTC thermistor 47 toward the tire mold. After heating the tire mold for 10 minutes, the PLC controller activates the first electric telescopic rod 67, which pushes the push plate 68 toward the tire mold. This causes the adjusting block 65 to move synchronously, which in turn causes the PTC thermistor 47 to move synchronously. When the PTC thermistor 47 contacts the tire mold, its resistance value changes immediately, and the current transmitted to the PLC controller through it changes. Therefore, the current monitoring module in the PLC controller, upon detecting the current change, immediately controls the first electric telescopic rod 67 to stop extending or retracting. At different contact points of the PTC thermistors 47, there are thick-walled and thin-walled regions. The thick-walled region generates relatively less heat because its thickness makes heat conduction more difficult. Heat conduction takes time; within a limited time, the rate of heat transfer in the thick-walled region is slower, as if heat is struggling to "travel" through this area, making it difficult to raise the overall temperature of the thick-walled region quickly. Conversely, the thin-walled region has a higher temperature because its thinness makes heat conduction relatively easier. Similarly, within a limited time, heat transfer is faster in thin-walled areas, as if heat can "run" quickly in this area, allowing the thin-walled area to be heated in a shorter time and the temperature to rise faster. This difference reflects that within a limited time, different wall thicknesses lead to different heat conduction rates, resulting in differences in heat distribution. The higher the heat of the PTC thermistor 47, the greater its resistance. Therefore, the thickness of this part can be calculated by the current detected by the PLC controller, and then the data is generated in the PLC controller. After the PTC thermistor 47 completes the detection, the air in the elastic airbag 33 is released by the exhaust pump 35, that is, the flexible water bag ring 31 does not contact the tire mold, and the heating plate 32 is turned off.

[0051] Then, the PLC controller controls the second motor 44 to reverse 180 degrees, so that the drill rod 42 faces the tire mold. Since the PTC thermistor 47 and the drill rod 42 are on the same axis, the drilling position of the drill rod 42 is the contact position of the PTC thermistor 47. Then, the PLC controller controls the first motor 41 at each position to start according to the thickness detected at each position. Then, the second motor 44 drives the rotation speed of the drill rod 42 according to the actual thickness. Then, the forward extension speed of the first electric telescopic rod 67 is controlled in real time according to the actual thickness, so as to apply stable forward pressure to the drill rod 42 and thus control the drilling pressure. For example, when the thickness of the thin-walled area is 3-5mm, the drilling speed can reach about 100-150mm per minute, and the drilling pressure is controlled at about 0.5-1.5MPa; when the thickness of the thick-walled area is 20-30mm, the drilling speed may decrease to about 30-80mm per minute, and the pressure will be about 2-5MPa.

[0052] During the drilling process, the air pump 74 is activated to extract the gas (air including debris generated during drilling) from the elastic rubber ring 71 through the annular exhaust hood 77. The gas is then discharged into the air intake hood 73 through the exhaust pipe 75 and then into the storage chamber to achieve real-time cleaning of debris generated during drilling.

[0053] Since the forward extension speed of the first electric telescopic rod 67 is constant, the drilling efficiency of the drill rod 42 will decrease as the drill rod 42 wears down. However, since the drilling pressure is continuously applied, but the drilling depth (less than the normal depth) is inconsistent with the pressure, the drill rod 42 will be squeezed. The pressure is then transmitted to the pressure-sensitive resistor 51 through the drill rod 42. When the resistance value of the pressure-sensitive resistor 51 reaches the threshold (the threshold is the resistance value when the drill rod 42 needs to be replaced after pre-testing), the PLC controller controls all components to reset and sends an alarm signal to the operator to replace the drill rod 42.

[0054] By de-energizing the N-class electromagnet 57 and the S-class electromagnet 58, the miniature electric telescopic rod 53 retracts and resets, causing the magnetorheological fluid to solidify. The retraction and reset of the miniature electric telescopic rod 53 also resets the frustum-shaped compression ring 511, preventing it from pressing the drill rod 42 and thus disengaging it. The drill rod 42 is then removed and replaced, inserted into the annular opening of the annular liquid bag 55. The N-class electromagnet 57 and the S-class electromagnet 58 are then energized, causing the magnetorheological fluid to solidify and thus fixing the drill rod 42. The miniature electric telescopic rod 53 then drives the frustum-shaped compression ring 511 forward, pressing the anti-slip pad 59. This further secures the drill rod 42, allowing the first motor 41 to drive the mounting cylinder 52, thereby rotating the drill rod 42.

[0055] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel tire mold drilling machine, characterized in that, include: Operation frame (1), the inner bottom wall of the operation frame (1) is provided with a placement groove (2); Thickness / thinness wall detection mechanism (3) is set in the placement groove (2). The thickness / thinness wall detection mechanism (3) includes a flexible water bag ring (31) for holding heated water. The bottom end of the flexible water bag ring (31) is slidably connected to the inner bottom wall of the placement groove (2). A heating plate (32) is provided on the inner peripheral wall of the flexible water bag ring (31). An elastic air bag (33) for squeezing the flexible water bag ring (31) is provided at the top end of the placement groove (2). An adaptive drilling mechanism (4) includes a first motor (41) as a drive source, and a drill rod (42) for drilling is detachably fixed at the output end of the first motor (41). The drill bit monitoring and replacement mechanism (5) includes a varistor (51) for detecting the drilling status of the drill bit. The outer wall of the varistor (51) is fixedly connected to the outer wall of the first motor (41). The output end of the first motor (41) is fixedly connected to an installation cylinder (52), which is used to fix the drill rod (42).

2. The novel tire mold drilling machine according to claim 1, characterized in that, It also includes a drilling adjustment mechanism (6), which includes a multi-stage electric telescopic rod (61) fixedly connected to the inner top wall of the operating frame (1). The telescopic end of the multi-stage electric telescopic rod (61) is fixedly connected to a connecting circular plate (62). The bottom end of the connecting circular plate (62) is provided with multiple sets of circumferential array sliding limit structures, and each set of sliding limit structures is composed of two parallel sliding grooves (63). The inner wall of each sliding groove (63) is slidably connected to a sliding plate (64). The bottom ends of the two adjacent sliding plates (64) are fixedly connected to an adjustment block (65).

3. The novel tire mold drilling machine according to claim 2, characterized in that, The bottom end of the connecting circular plate (62) is fixedly connected to a plurality of load-bearing plates (66) that are in contact with the adjusting block (65). The load-bearing plates (66) are fixedly connected to a first electric telescopic rod (67) at the center of the connecting circular plate (62). The telescopic end of the first electric telescopic rod (67) is fixedly connected to a push plate (68). The bottom end of the push plate (68) is fixedly connected to the top end of the adjusting block (65). The center of the connecting circular plate (62) is fixedly connected to an elastic electromagnetic compression rod (69).

4. The novel tire mold drilling machine according to claim 1, characterized in that, The thickness and thinness detection mechanism (3) also includes an operating table (34) fixedly connected to the bottom of the operating frame (1). The bottom of the operating table (34) is fixedly connected to an exhaust pump (35). The output end of the exhaust pump (35) is fixedly connected to an air outlet pipe. The other end of the air outlet pipe is fixedly connected to the inside of the elastic airbag (33). The outer wall of the elastic airbag (33) is intermittently in contact with the inner peripheral wall of the flexible water bag ring (31).

5. A novel tire mold drilling machine according to claim 1, characterized in that, The adaptive drilling mechanism (4) includes a rotating groove (43) opened at the bottom of the adjusting block (65). A second motor (44) is fixedly connected to the outer wall of the adjusting block (65). A rotating shaft (45) is fixedly connected to the output end of the second motor (44). A rotating block (46) is fixedly connected to the outer wall of the rotating shaft (45). A PTC thermistor (47) is fixedly connected to one side of the rotating block (46). The other side of the rotating block (46) is fixedly connected to the first motor (41). The PTC thermistor (47), the first motor (41), and the first electric telescopic rod (67) are electrically connected to a PLC controller to form an adaptive drilling circuit.

6. A novel tire mold drilling machine according to claim 5, characterized in that, The drill bit monitoring and replacement mechanism (5) also includes a miniature electric telescopic rod (53) fixedly connected to the inner wall of the mounting cylinder (52). The telescopic end of the miniature electric telescopic rod (53) is provided with a storage groove (54). The inner wall of the storage groove (54) is provided with an annular liquid bag (55). The annular liquid bag (55) is provided with magnetorheological fluid. The telescopic end of the miniature electric telescopic rod (53) is provided with two placement cavities (56) located on both sides of the storage groove (54). The two placement cavities (56) are respectively provided with an N-level electromagnet (57) and an S-level electromagnet (58). The PLC controller is electrically connected to the miniature electric telescopic rod (53), the N-level electromagnet (57), the S-level electromagnet (58), and the varistor (51) to form a replacement circuit.

7. A novel tire mold drilling machine according to claim 6, characterized in that, The inner wall of the mounting cylinder (52) is elastically hinged with multiple circumferentially arranged compression anti-slip pads (59). The outer wall of the telescopic end of the miniature electric telescopic rod (53) is fixedly connected with a connecting ring (510). The outer wall of the connecting ring (510) is fixedly connected with a frustum compression ring (511). The inner wall of the frustum compression ring (511) slides in contact with the outer wall of the multiple compression anti-slip pads (59). The outer circumferential wall of the drill rod (42) is fixedly connected with multiple anti-rotation plates (512). The inner circumferential wall of the annular liquid bag (55) is in contact with the outer wall of the drill rod (42) and the multiple anti-rotation plates (512). The inner side of the multiple compression anti-slip pads (59) is in contact with the outer wall of the drill rod (42). The PLC controller is electrically connected to the heating plate (32), the second motor (44), the first electric telescopic rod (67), and the exhaust pump (35) to form a starting circuit.

8. A novel tire mold drilling machine according to claim 7, characterized in that, It also includes a cleaning mechanism (7), which includes a storage cavity inside the adjusting block (65). The inner circumferential wall of the rotating groove (43) is provided with a rotating groove (72) communicating with the storage cavity. The inner wall of the rotating groove (72) is airtightly rotatably connected to an air inlet hood (73). The top of the rotating block (46) is fixedly connected to an air pump (74). The air outlet of the air pump (74) is fixedly connected to an exhaust pipe (75). The other end of the exhaust pipe (75) is connected to... The air intake hood (73) is fixedly connected to the inside. The exhaust end of the air pump (74) is fixedly connected to the exhaust pipe (76). The other end of the exhaust pipe (76) is fixedly connected to the annular exhaust hood (77). The outer wall of the annular exhaust hood (77) is fixedly connected to the outer wall of the mounting cylinder (52). The outer wall of the exhaust port of the annular exhaust hood (77) is fixedly connected to the elastic rubber ring (71). The PLC controller is electrically connected to the air pump (74) to form a cleaning circuit.

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