A PTC electric heater shovel-tooth structure cutting device with intelligent positioning function

Abstract

The invention discloses a PTC electric heater shovel-tooth structure cutting device with an intelligent positioning function. The cutting device comprises a base, a workbench, a moving mechanism, a cutting mechanism and a positioning mechanism. The workbench is tightly connected to the base, the moving mechanism is tightly connected to the workbench, the cutting mechanism is tightly connected to the workbench, the moving mechanism is transmission-connected to the positioning mechanism, the positioning mechanism is slidingly connected to the workbench, and the positioning mechanism is used for clamping and positioning the workpiece. During processing, the workpiece is first placed on the positioning mechanism, the positioning mechanism starts to automatically position and clamp the workpiece, and the positioning mechanism can drive the workpiece to flip, so as to realize double-sided processing of the workpiece, the moving mechanism is used to drive the positioning mechanism to move to a position suitable for processing on the workbench, and the cutting mechanism starts to cut the workpiece, so as to cut out heat dissipation fins on both sides of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of shoveling machines, in particular to a PTC electric heater shoveling-type structure cutting device with an intelligent positioning function. Background Art

[0002] The working principle of PTC heaters is based on the characteristics of their materials, which are usually made of heat-sensitive ceramic materials. When the PTC heater is powered on, the current passing through the device generates heat. As the temperature rises, the resistance of the device increases, thereby limiting further current flow, achieving the effect of automatically stabilizing and limiting the final temperature. This self-regulating characteristic makes PTC heaters very effective in controlling temperature and preventing overheating.

[0003] In terms of application, PTC heaters are commonly used in various equipment, such as water heaters, air heaters, dryers, electric kettles, etc., as well as heating and temperature control systems in industrial equipment. Its advantages include fast response, high energy efficiency, strong stability and safe use, so it is widely welcomed and applied.

[0004] In order to ensure the heat dissipation efficiency of the PTC heater, an aluminum tube with heat dissipation fins is often used as a heat dissipation element. This aluminum tube is generally processed by a gear-shoveling machine to cut heat dissipation fins on both sides of the aluminum tube. However, when processing the aluminum tube, the existing cutting equipment often needs to clamp and position multiple times to meet the needs of double-sided processing, and the positioning accuracy is not high. In addition, when cutting the aluminum tube, because the wall of the aluminum tube is thin, it is easy to deform during processing, the yield rate cannot be guaranteed, and the cutting heat generated during processing is easy to cause stress accumulation in the workpiece at the cutting point. Summary of the invention

[0005] The object of the present invention is to provide a PTC electric heater skive-tooth structure cutting device with an intelligent positioning function to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: the cutting equipment includes a base, a worktable, a moving mechanism, a cutting mechanism and a positioning mechanism. The worktable is firmly connected to the base, the moving mechanism is firmly connected to the worktable, the cutting mechanism is firmly connected to the worktable, the moving mechanism is transmission-connected to the positioning mechanism, the positioning mechanism is slidingly connected to the worktable, and the positioning mechanism is used to clamp and position the workpiece.

[0007] The workpiece processed in this application is a hollow square aluminum tube. The base is placed on the ground to provide stable support for each mechanism, and the workbench is installed on the base to provide a stable environment for cutting processing. During processing, the workpiece is first placed on the positioning mechanism, and the positioning mechanism starts to automatically position and clamp the workpiece, and the positioning mechanism can drive the workpiece to flip, so as to realize double-sided processing of the workpiece. The moving mechanism is used to drive the positioning mechanism to move on the workbench to a position suitable for processing, and the cutting mechanism starts to cut the workpiece, thereby cutting out heat dissipation fins on both sides of the workpiece.

[0008] Furthermore, a transmission chamber and a guide groove are provided on the workbench, and the moving mechanism includes a transmission motor, a screw rod and a slide. The transmission motor is tightly connected to the workbench, the output end of the transmission motor is transmission connected to the screw rod, the screw rod is rotationally connected to the workbench, the screw rod is transmission connected to the slide, the screw rod is located in the transmission chamber, and the slide is slidingly connected to the guide groove.

[0009] The transmission chamber is used to accommodate the moving mechanism, and the guide groove is used to provide guidance for the positioning mechanism. During processing, the transmission motor is started to transmit the torque to the screw rod, thereby driving the slide to move linearly along the guide groove, and then driving the positioning mechanism on the slide to move, thereby processing the workpiece fixed on the positioning mechanism.

[0010] Furthermore, the positioning mechanism includes a self-locking motor, a positioning assembly and a clamping assembly, the self-locking motor is tightly connected to the slide, the output end of the self-locking motor is transmission-connected to the positioning assembly, and the clamping assembly is tightly connected to the slide;

[0011] When clamping: the clamping component and the positioning component are engaged.

[0012] The positioning component matches the inner hole size of the square aluminum tube to be processed. When positioning, first insert the square aluminum tube into the positioning component. The positioning component positions the workpiece so that the center of the workpiece matches the center of the positioning component. Then the clamping component moves to fix the workpiece to prevent the workpiece from shaking during processing. After processing one side of the workpiece, the self-locking motor starts to drive the positioning component to flip, thereby driving the workpiece to flip to the other side for processing.

[0013] Furthermore, the positioning assembly includes a rotating block, an adjusting cylinder, a first positioning plate, a second positioning plate, a transmission shaft, a bushing and a connecting rod. The rotating block is transmission-connected to the output end of the self-locking motor, a sliding groove and an active cavity are provided on the rotating block, the adjusting cylinder is tightly connected to the rotating block, the adjusting cylinder is located in the active cavity, the output end of the adjusting cylinder is transmission-connected to the transmission shaft, the transmission shaft is slidingly connected to the active cavity, the bushing is tightly connected to the rotating block, the bushing is sleeved on the transmission shaft, the first positioning plate and the second positioning plate are slidingly connected to the sliding groove, the first positioning plate is located on the upper and lower sides of the transmission shaft, the second positioning plate is located on the left and right sides of the transmission shaft, an opening is provided on the bushing, one end of the connecting rod passes through the opening on the bushing and is hinged to the transmission shaft, and the other end of the connecting rod is respectively hinged to the first positioning plate and the second positioning plate.

[0014] The movable cavity is used to provide an installation position for the adjusting cylinder and provide a guiding function for the transmission shaft. After the workpiece is placed on the positioning assembly, the adjusting cylinder is started to drive the transmission shaft to move along the movable cavity toward the rotating block. Driven by the connecting rod hinged to the transmission shaft, the first positioning plate and the second positioning plate will expand outward along the slide groove, thereby abutting against the inner wall of the workpiece. Because the first positioning plate and the second positioning plate are synchronously expanded outward with the transmission shaft as the center, the center of the workpiece is driven to fit with the center of the transmission shaft to achieve automatic positioning of the workpiece position. After the first positioning plate and the second positioning plate abut against the inner wall of the workpiece, additional support can be provided for the workpiece to prevent the workpiece from being deformed during processing, thereby improving the yield rate. Because the inner hole cross-section of the workpiece to be processed is a rectangle, the first positioning plate and the second positioning plate are arranged on the upper and lower sides and the left and right sides respectively, and the shapes of the first positioning plate and the second positioning plate match the inner hole of the workpiece. When one side of the workpiece is processed, the self-locking motor is started to drive the rotating block to flip, and then drive the workpiece to flip to the other side for processing. There is no need to clamp and position the workpiece for the second time, thereby improving the processing accuracy.

[0015] Furthermore, the width of the first positioning plate is greater than that of the second positioning plate.

[0016] Because the cross section of the inner hole of the workpiece is rectangular, in order for the first positioning plate and the second positioning plate to match the inner hole of the workpiece, the width of the first positioning plate is set to be greater than that of the second positioning plate.

[0017] Furthermore, the clamping assembly includes a first cylinder, a second cylinder, a crossbeam and a clamping plate. The first cylinder is firmly connected to the slide, the output end of the first cylinder is transmission-connected to the crossbeam, the second cylinder is firmly connected to the crossbeam, the output end of the second cylinder is ball-hinged to the clamping plate, and a positioning block is provided on the side of the clamping plate facing the positioning assembly, and the diameter of the positioning block matches the diameter of the sleeve.

[0018] When the positioning assembly completes positioning of the workpiece, the clamping assembly starts to clamp the workpiece, the first cylinder starts to drive the crossbeam to move up to the same height as the positioning assembly, and then the second cylinder starts to drive the clamping plate to move toward the side of the positioning assembly, thereby abutting against the workpiece to clamp the workpiece. In order for the clamping plate to rotate together when the positioning assembly is flipped to avoid motion interference, the clamping plate ball is hinged to the output end of the second cylinder; in addition, by arranging a positioning block on the clamping plate, the positioning block can be snapped onto the inner hole of the sleeve, thereby improving the stability during clamping.

[0019] Furthermore, an annular flow channel is provided on the rotating block, the inlet of the annular flow channel is connected to the external cooling liquid, the outlet of the annular flow channel faces the clamping plate, the clamping plate is provided with a liquid outlet, the first positioning plate is provided with a plurality of recessed areas and raised areas on the side facing the transmission shaft, a cooling flow channel is formed between the two first positioning plates, a cooling cavity, a liquid inlet flow channel and a liquid outlet flow channel are provided on the first positioning plate, the position of the cooling cavity corresponds to the raised area, the liquid inlet flow channel and the liquid outlet flow channel are respectively connected to the cooling cavity, the liquid inlet flow channel is located in the recessed area, and the liquid outlet flow channel is located in the raised area, a temperature control component is also provided on the first positioning plate, the temperature control component is located at the liquid outlet flow channel, and the temperature control component is used to control the flow rate of coolant in the cooling cavity.

[0020] When a workpiece is cut, a large amount of cutting heat will be generated. If it cannot be cooled in time, stress will accumulate at the cutting point, making the heat dissipation fins easy to break. However, the existing cooling method often sprays coolant directly on the surface of the workpiece, which cannot dissipate heat to the inner wall of the aluminum tube, resulting in inconsistent cooling efficiency on the inside and outside of the aluminum tube, which easily leads to stress concentration. By opening an annular flow channel on the rotating block, the coolant enters the inner hole of the aluminum tube through the annular flow channel to cool the inner wall of the aluminum tube. After cooling, the coolant is discharged through the liquid outlet on the clamping plate; however, after entering the interior of the aluminum tube, the coolant will flow along the cooling channel formed between the two first positioning plates and cannot directly contact the inner wall of the aluminum tube. By setting a cooling cavity on the first positioning plate, the cooling cavity The opening faces the workpiece, so that the coolant can directly contact the inner wall of the aluminum tube, thereby improving the heat dissipation efficiency. In addition, by arranging a plurality of recessed areas and convex areas on the first positioning plate, a plurality of contraction sections and expansion sections are formed in the cooling channel. When the coolant flows through the contraction section, the flow cross-section is reduced and the flow velocity is increased, so that the coolant pressure in the contraction section is lower, and the pressure at the outlet of the liquid outlet channel is lower than the pressure at the inlet of the liquid inlet channel. Under the action of the pressure difference, the flow of the coolant in the cooling chamber can be promoted, and the cooling efficiency can be further improved. In addition, during the cutting operation, the cutting position is constantly changing, which makes the heat accumulation zone constantly changing. The coolant flow in the plurality of cooling chambers is controlled by the temperature control component to realize real-time adjustment of the cooling efficiency of different areas.

[0021] Furthermore, the temperature control component includes an electromagnet, an adjustment block, a return spring and a thermistor. An adjustment slot is provided on the first positioning plate. The electromagnet is tightly connected to the adjustment slot. The adjustment block is slidingly connected to the adjustment slot. A flow hole is provided on the adjustment block. The adjustment block is made of ferromagnetic material. The flow hole is eccentrically arranged with the liquid outlet channel. One end of the return spring is tightly connected to the adjustment block. The other end of the return spring is tightly connected to the inner wall of the adjustment slot. The thermistor is tightly connected to the inner wall of the liquid outlet channel. The thermistor is electrically connected to the electromagnet.

[0022] In the initial state of the temperature control component, the electromagnet is energized, the adjustment block is attracted by the electromagnet, and the reset spring is stretched by force; when the cutting position is located in a certain cooling chamber, the temperature of the coolant in the cooling chamber at this position is relatively high. When the coolant flows out through the liquid outlet channel, the temperature of the thermistor located on the inner wall of the liquid outlet channel will also rise, and the resistance value will increase. By connecting the thermistor to an external detection power supply to form a detection circuit, when it is detected that the resistance value of the thermistor has increased, the current transmitted to the electromagnet will decrease accordingly, the magnetic force of the electromagnet will decrease, and the attraction to the adjustment block will decrease. Under the action of the elastic force of the reset spring, the adjustment block will move to one side along the adjustment groove, the flow cross section between the flow hole and the liquid outlet channel will increase, the flow rate of the coolant in the cooling chamber will increase accordingly, and the cooling efficiency will be improved; the cooling efficiency of the aluminum tube can be adjusted in real time according to different cutting positions, thereby reducing the generation of thermal stress.

[0023] Furthermore, the cutting mechanism includes a bracket, a power cylinder and a cutter. The bracket is firmly connected to the workbench, the power cylinder is firmly connected to the bracket, the output end of the power cylinder is transmission-connected to the cutter, a sliding groove is provided on the bracket, and the cutter is slidingly connected to the sliding groove.

[0024] The bracket is fixed on the workbench to provide stable support for the cutting mechanism. The power cylinder is the main power source of the cutting mechanism. During the cutting operation, the reciprocating motion of the power cylinder drives the cutter to reciprocate along the sliding groove, thereby realizing the cutting operation of the workpiece.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: by arranging the first positioning plate and the second positioning plate around the transmission shaft, the first positioning plate and the second positioning plate are synchronously expanded outward with the transmission shaft as the center under the drive of the adjusting cylinder, so that the center of the workpiece is driven to fit with the center of the transmission shaft, thereby realizing automatic positioning of the workpiece position, and after the first positioning plate and the second positioning plate abut against the inner wall of the workpiece, they can provide additional support for the workpiece, prevent the workpiece from being deformed during processing, and improve the yield rate; by arranging a cooling cavity on the first positioning plate, the opening of the cooling cavity faces the workpiece, so that the coolant can directly contact the inner wall of the aluminum tube, thereby improving heat dissipation. In addition, by arranging a number of recessed areas and raised areas on the first positioning plate, a number of contraction sections and expansion sections are formed in the cooling channel. When the coolant flows through the contraction section, the flow cross-section is reduced and the flow velocity is increased, which makes the coolant pressure in the contraction section lower, and the pressure at the outlet of the liquid outlet channel is lower than the pressure at the inlet of the liquid inlet channel. Under the action of the pressure difference, the flow of coolant in the cooling chamber can be promoted, and the cooling efficiency is further improved. In addition, during the cutting operation, the cutting position is constantly changing, which makes the heat accumulation area constantly changing. The coolant flow in several cooling chambers is controlled by the temperature control component to realize real-time adjustment of the cooling efficiency of different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the mobile mechanism of the present invention;

[0029] Figure 3 is a schematic diagram of the positioning mechanism of the present invention;

[0030] Figure 4 yes Figure 3 A partial enlarged view of the A direction;

[0031] Figure 5 is a schematic diagram of the positioning component;

[0032] Figure 6 yes Figure 5 A local B-direction enlarged view;

[0033] Figure 7 It is a schematic diagram of the coolant flow of the present invention;

[0034] Figure 8 yes Figure 7 A local C-direction enlarged view;

[0035] Fig. 9 is a schematic diagram of a temperature control assembly of the present invention;

[0036] Fig.10 A schematic diagram of a cutting mechanism of the present invention;

[0037] In the figure: 1-base, 2-workbench, 21-transmission chamber, 22-guide groove, 3-moving mechanism, 31-transmission motor, 32-screw, 33-slide, 4-cutting mechanism, 41-bracket, 42-power cylinder, 43-cutter, 5-positioning mechanism, 51-self-locking motor, 52-positioning assembly, 521-rotating block, 5211-slide, 5212-active cavity, 5213-annular flow channel, 522-adjusting cylinder, 523-first positioning plate, 5231-recessed area, 5232-convex area, 5 233-cooling chamber, 5234-liquid inlet channel, 5235-liquid outlet channel, 5236-adjusting groove, 524-second positioning plate, 525-transmission shaft, 526-sleeve, 527-connecting rod, 53-clamping assembly, 531-first cylinder, 532-second cylinder, 533-crossbeam, 534-clamping plate, 5341-liquid outlet, 535-positioning block, 54-temperature control assembly, 541-electromagnet, 542-adjusting block, 5421-flow hole, 543-reset spring, 544-thermistor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-10 , the present invention provides a technical solution:

[0040] The cutting equipment includes a base 1, a worktable 2, a moving mechanism 3, a cutting mechanism 4 and a positioning mechanism 5. The worktable 2 is firmly connected to the base 1, the moving mechanism 3 is firmly connected to the worktable 2, the cutting mechanism 4 is firmly connected to the worktable 2, the moving mechanism 3 is transmission-connected to the positioning mechanism 5, the positioning mechanism 5 is slidingly connected to the worktable 2, and the positioning mechanism 5 is used for clamping and positioning the workpiece.

[0041] The workpiece processed in the present application is a hollow square aluminum tube. The base 1 is placed on the ground to provide stable support for each mechanism, and the workbench 2 is installed on the base to provide a stable environment for cutting processing. During processing, the workpiece is first placed on the positioning mechanism 5, and the positioning mechanism 5 starts to automatically position and clamp the workpiece, and the positioning mechanism 5 can drive the workpiece to flip, so as to realize double-sided processing of the workpiece. The moving mechanism 3 is used to drive the positioning mechanism 5 to move on the workbench 2 to a position suitable for processing, and the cutting mechanism 4 starts to cut the workpiece, thereby cutting out heat dissipation fins on both sides of the workpiece.

[0042] A transmission chamber 21 and a guide groove 22 are provided on the workbench 2. The moving mechanism 3 includes a transmission motor 31, a screw rod 32 and a slide 33. The transmission motor 31 is tightly connected to the workbench 2. The output end of the transmission motor 31 is transmission-connected to the screw rod 32. The screw rod 32 is rotationally connected to the workbench 2. The screw rod 32 is transmission-connected to the slide 33. The screw rod 32 is located in the transmission chamber 21. The slide 33 is slidingly connected to the guide groove 22.

[0043] The transmission chamber 21 is used to accommodate the moving mechanism 3, and the guide groove 22 is used to provide guidance for the positioning mechanism 5. During processing, the transmission motor 31 is started to transmit the torque to the screw rod 32, thereby driving the slide 33 to move in a straight line to the guide groove 22, and then driving the positioning mechanism 5 on the slide 33 to move, so as to perform processing operations on the workpiece fixed on the positioning mechanism 5.

[0044] The positioning mechanism 5 includes a self-locking motor 51, a positioning assembly 52 and a clamping assembly 53. The self-locking motor 51 is firmly connected to the slide 33. The output end of the self-locking motor 51 is transmission-connected to the positioning assembly 52. ​​The clamping assembly 53 is firmly connected to the slide 33.

[0045] During clamping: the clamping assembly 53 is engaged with the positioning assembly 52 .

[0046] The positioning component 52 matches the inner hole size of the square aluminum tube to be processed. When positioning, the square aluminum tube is first inserted into the positioning component 52. The positioning component 52 positions the workpiece so that the center of the workpiece matches the center of the positioning component 52. Then the clamping component 53 is actuated to fix the workpiece to prevent the workpiece from shaking during processing. After processing one side of the workpiece, the self-locking motor 51 is started to drive the positioning component 52 to flip, thereby driving the workpiece to flip to the other side for processing.

[0047] The positioning assembly 52 includes a rotating block 521, an adjusting cylinder 522, a first positioning plate 523, a second positioning plate 524, a transmission shaft 525, a sleeve 526 and a connecting rod 527. The rotating block 521 is connected to the output end of the self-locking motor 51 by transmission. The rotating block 521 is provided with a slide groove 5211 and an active cavity 5212. The adjusting cylinder 522 is fastened to the rotating block 521. The adjusting cylinder 522 is located in the active cavity 5212. The output end of the adjusting cylinder 522 is connected to the transmission shaft 525 by transmission. The transmission shaft 525 slides with the active cavity 5212. The shaft sleeve 526 is connected with the rotating block 521 in a fixed manner, the shaft sleeve 526 is sleeved on the transmission shaft 525, the first positioning plate 523 and the second positioning plate 524 are slidably connected with the slide groove 5211, the first positioning plate 523 is located on the upper and lower sides of the transmission shaft 525, the second positioning plate 524 is located on the left and right sides of the transmission shaft 525, an opening is provided on the shaft sleeve 526, one end of the connecting rod 527 passes through the opening on the shaft sleeve 526 and is hinged to the transmission shaft 525, and the other end of the connecting rod 527 is respectively hinged to the first positioning plate 523 and the second positioning plate 524.

[0048] The movable cavity 5212 is used to provide an installation position for the adjusting cylinder 522 and to provide a guide for the transmission shaft 525. After the workpiece is placed on the positioning assembly 52, the adjusting cylinder 522 is started to drive the transmission shaft 525 to move along the movable cavity toward the rotating block 521. Driven by the connecting rod 527 hinged to the transmission shaft 525, the first positioning plate 523 and the second positioning plate 524 will expand outward along the slide groove 5211, thereby abutting against the inner wall of the workpiece. Because the first positioning plate 523 and the second positioning plate 524 are synchronously expanded outward with the transmission shaft 525 as the center, the center of the workpiece is driven to fit with the center of the transmission shaft 525, thereby achieving the position of the workpiece. Automatic positioning, and after the first positioning plate 523 and the second positioning plate 524 abut against the inner wall of the workpiece, they can provide additional support for the workpiece, prevent the workpiece from deformation during processing, and improve the yield rate; because the inner hole cross-section of the workpiece to be processed is rectangular, the first positioning plate 523 and the second positioning plate 524 are arranged on the upper and lower sides and the left and right sides, respectively, and the shapes of the first positioning plate 523 and the second positioning plate 524 match the inner hole of the workpiece; when one side of the workpiece is processed, the self-locking motor 51 is started, driving the rotating block 521 to flip, and then driving the workpiece to flip to the other side for processing, without the need for secondary clamping and positioning of the workpiece, thereby improving the processing accuracy.

[0049] The width of the first positioning plate 523 is greater than that of the second positioning plate 524 .

[0050] Because the cross section of the inner hole of the workpiece is rectangular, in order for the first positioning plate 523 and the second positioning plate 524 to match the inner hole of the workpiece, the width of the first positioning plate 523 is set to be greater than that of the second positioning plate 524 .

[0051] The clamping assembly 53 includes a first cylinder 531, a second cylinder 532, a cross beam 533 and a clamping plate 534. The first cylinder 531 is fastened to the slide 33, the output end of the first cylinder 531 is transmission-connected to the cross beam 533, the second cylinder 532 is fastened to the cross beam 533, the output end of the second cylinder 532 is ball-hinged to the clamping plate 534, and a positioning block 535 is provided on the side of the clamping plate 534 facing the positioning assembly 52, and the diameter of the positioning block 535 matches the diameter of the shaft sleeve 526.

[0052] When the positioning assembly 52 completes positioning of the workpiece, the clamping assembly 53 starts to clamp the workpiece, the first cylinder 531 starts to drive the crossbeam 533 to move up to the same height as the positioning assembly 52, and then the second cylinder 532 starts to drive the clamping plate 534 to move toward the side of the positioning assembly 52, thereby abutting against the workpiece to clamp the workpiece. In order for the clamping plate 534 to rotate together when the positioning assembly 52 is flipped to avoid motion interference, the clamping plate 534 is ball-hinged at the output end of the second cylinder 532; in addition, by arranging a positioning block 535 on the clamping plate 534, the positioning block 535 can be snapped onto the inner hole of the sleeve 526, thereby improving the stability during clamping.

[0053] The rotating block 521 is provided with an annular flow channel 5213, the inlet of the annular flow channel 5213 is externally connected to the cooling liquid, the outlet of the annular flow channel 5213 faces the clamping plate 534, and the clamping plate 534 is provided with a liquid outlet 5341. The first positioning plate 523 is provided with a plurality of recessed areas 5231 and raised areas 5232 on the side facing the transmission shaft 525, and a cooling flow channel is formed between the two first positioning plates 523. The first positioning plate 523 is provided with a cooling cavity 5233, a liquid inlet flow channel 5234 and The positions of the liquid outlet channel 5235 and the cooling cavity 5233 correspond to the raised area 5232. The liquid inlet channel 5234 and the liquid outlet channel 5235 are respectively connected to the cooling cavity 5233. The liquid inlet channel 5234 is located in the recessed area 5231, and the liquid outlet channel 5235 is located in the raised area 5232. A temperature control component 54 is also provided on the first positioning plate 523. The temperature control component 54 is located at the liquid outlet channel 5235. The temperature control component 54 is used to control the flow rate of coolant in the cooling cavity 5233.

[0054] When a workpiece is cut, a large amount of cutting heat will be generated. If it cannot be cooled in time, stress will accumulate at the cutting point, making the heat dissipation fins easy to break. However, the existing cooling method often sprays coolant directly onto the surface of the workpiece, which cannot dissipate heat to the inner wall of the aluminum tube, resulting in inconsistent cooling efficiency on the inside and outside of the aluminum tube, which easily leads to stress concentration. By opening an annular flow channel 5213 on the rotating block 521, the coolant enters the inner hole of the aluminum tube through the annular flow channel 5213 to cool the inner wall of the aluminum tube. After cooling, the coolant is discharged through the liquid outlet 5341 on the clamping plate 534; however, after entering the interior of the aluminum tube, the coolant will flow along the cooling channel formed between the two first positioning plates 523 and cannot directly contact the inner wall of the aluminum tube. By setting a cooling cavity 5233 on the first positioning plate 523, the cooling cavity 523 3 is oriented toward the workpiece, so that the coolant can directly contact the inner wall of the aluminum tube, thereby improving the heat dissipation efficiency. In addition, by arranging a plurality of recessed areas 5231 and convex areas 5232 on the first positioning plate 523, a plurality of contraction sections and expansion sections are formed in the cooling channel. When the coolant flows through the contraction section, the flow cross section is reduced and the flow velocity is increased, so that the coolant pressure in the contraction section is relatively low, so that the pressure at the outlet of the liquid outlet channel 5235 is lower than the pressure at the inlet of the liquid inlet channel 5234. Under the action of the pressure difference, the flow of the coolant in the cooling chamber 5233 can be promoted, thereby further improving the cooling efficiency. In addition, during the cutting operation, the cutting position is constantly changing, which makes the heat accumulation zone constantly changing. The coolant flow in the plurality of cooling chambers 5233 is controlled by the temperature control component 54, so as to realize the real-time adjustment of the cooling efficiency of different areas.

[0055] The temperature control component 54 includes an electromagnet 541, an adjustment block 542, a return spring 543 and a thermistor 544. An adjustment groove 5236 is provided on the first positioning plate 523. The electromagnet 541 is tightly connected to the adjustment groove 5236. The adjustment block 542 is slidably connected to the adjustment groove 5236. A flow hole 5421 is provided on the adjustment block 542. The adjustment block 542 is made of ferromagnetic material. The flow hole 5421 is eccentrically arranged with the liquid outlet channel 5235. One end of the return spring 543 is tightly connected to the adjustment block 542. The other end of the return spring 543 is tightly connected to the inner wall of the adjustment groove 5236. The thermistor 544 is tightly connected to the inner wall of the liquid outlet channel 5235. The thermistor 544 is electrically connected to the electromagnet 541.

[0056] In the initial state of the temperature control component 54, the electromagnet 541 is energized, the adjustment block 542 is attracted by the electromagnet 541, and the return spring is stretched; when the cutting position is located at a certain cooling chamber 5233, the temperature of the coolant in the cooling chamber 5233 at this position is relatively high. When the coolant flows out through the outlet channel 5235, the temperature of the thermistor 544 located on the inner wall of the outlet channel 5235 will also rise, and the resistance value will increase. By connecting the thermistor 544 to an external detection power supply to form a detection circuit, when the resistance value of the thermistor 544 is detected to have increased, the temperature of the thermistor 544 will also rise. , the current transmitted to the electromagnet 541 will decrease accordingly, the magnetic force of the electromagnet 541 will decrease, and the attraction to the adjustment block 542 will decrease. Under the action of the elastic force of the return spring 543, the adjustment block 542 will move to one side along the adjustment groove 5236, and the flow cross section between the flow hole 5421 and the liquid outlet channel 5235 will increase, and the coolant flow in the cooling chamber 5233 will increase accordingly, and the cooling efficiency will be improved; the cooling efficiency of the aluminum tube can be adjusted in real time according to different cutting positions, reducing the generation of thermal stress.

[0057] The cutting mechanism 4 includes a bracket 41, a power cylinder 42 and a cutter 43. The bracket 41 is tightly connected to the workbench 2, the power cylinder 42 is tightly connected to the bracket 41, the output end of the power cylinder 42 is drivingly connected to the cutter 43, a sliding groove is provided on the bracket 41, and the cutter 43 is slidingly connected to the sliding groove.

[0058] The bracket 41 is fixed on the workbench 2 to provide stable support for the cutting mechanism 4. The power cylinder 42 is the main power source of the cutting mechanism 4. During the cutting operation, the reciprocating motion of the power cylinder 42 drives the cutter 43 to reciprocate along the sliding groove, thereby realizing the cutting operation of the workpiece.

[0059] The working principle of the present invention is as follows: after the workpiece is placed on the positioning assembly 52, the adjusting cylinder 522 is started, driving the transmission shaft 525 to move along the movable cavity toward the rotating block 521. Driven by the connecting rod 527 hinged to the transmission shaft 525, the first positioning plate 523 and the second positioning plate 524 will expand outward along the slide groove 5211, thereby abutting against the inner wall of the workpiece. Because the first positioning plate 523 and the second positioning plate 524 are synchronously expanded outward with the transmission shaft 525 as the center, the center of the workpiece is driven to fit with the center of the transmission shaft 525, thereby realizing automatic positioning of the workpiece position. After the first positioning plate 523 and the second positioning plate 524 abut against the inner wall of the workpiece, additional support can be provided for the workpiece to prevent the workpiece from being deformed during processing, thereby improving the yield rate. When one side of the workpiece is processed, the self-locking motor 51 is started, driving the rotating block 521 to flip, and then driving the workpiece to flip to the other side for processing. There is no need to perform secondary clamping and positioning on the workpiece, thereby improving the processing The precision is achieved; by providing an annular flow channel 5213 on the rotating block 521, the coolant enters the inner hole of the aluminum tube through the annular flow channel 5213, so as to cool the inner wall of the aluminum tube. After cooling, the coolant is discharged through the liquid outlet 5341 on the clamping plate 534; in addition, by providing a plurality of recessed areas 5231 and convex areas 5232 on the first positioning plate 523, a plurality of contraction sections and expansion sections are formed in the cooling flow channel. When the coolant flows through the contraction section, the flow velocity increases because the flow cross section is reduced, which makes the coolant pressure in the contraction section lower, so that the pressure at the outlet of the liquid outlet flow channel 5235 is lower than the pressure at the inlet of the liquid inlet flow channel 5234. Under the action of the pressure difference, the flow of the coolant in the cooling chamber 5233 can be promoted, and the cooling efficiency can be further improved; in addition, during the cutting operation, the cutting position is constantly changing, which makes the heat accumulation zone constantly changing. The coolant flow in the plurality of cooling chambers 5233 is controlled by the temperature control component 54, so as to achieve real-time adjustment of the cooling efficiency of different regions.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A PTC electric heater shovel-tooth structure cutting device with intelligent positioning function, characterized in that: The cutting device comprises a base (1), a workbench (2), a moving mechanism (3), a cutting mechanism (4) and a positioning mechanism (5); the workbench (2) is firmly connected to the base (1); the moving mechanism (3) is firmly connected to the workbench (2); the cutting mechanism (4) is firmly connected to the workbench (2); the moving mechanism (3) is transmission-connected to the positioning mechanism (5); the positioning mechanism (5) is slidably connected to the workbench (2); and the positioning mechanism (5) is used for clamping and positioning a workpiece; The positioning mechanism (5) comprises a self-locking motor (51), a positioning assembly (52) and a clamping assembly (53); the self-locking motor (51) is firmly connected to the slide table (33); the output end of the self-locking motor (51) is transmission-connected to the positioning assembly (52); and the clamping assembly (53) is firmly connected to the slide table (33); When clamping: the clamping component (53) is engaged with the positioning component (52); The positioning assembly (52) comprises a rotating block (521), an adjusting cylinder (522), a first positioning plate (523), a second positioning plate (524), a transmission shaft (525), a shaft sleeve (526) and a connecting rod (527); the rotating block (521) is drivingly connected to the output end of the self-locking motor (51); a sliding groove (5211) and an active cavity (5212) are provided on the rotating block (521); the adjusting cylinder (522) is fastened to the rotating block (521); the adjusting cylinder (522) is located in the active cavity (5212); the output end of the adjusting cylinder (522) is drivingly connected to the transmission shaft (525); the transmission shaft (525) and the active cavity (5212) are connected to each other. Sliding connection, the shaft sleeve (526) is tightly connected to the rotating block (521), the shaft sleeve (526) is sleeved on the transmission shaft (525), the first positioning plate (523) and the second positioning plate (524) are slidably connected to the slide groove (5211), the first positioning plate (523) is located on the upper and lower sides of the transmission shaft (525), the second positioning plate (524) is located on the left and right sides of the transmission shaft (525), the shaft sleeve (526) is provided with an opening, one end of the connecting rod (527) passes through the opening on the shaft sleeve (526) and is hinged to the transmission shaft (525), and the other end of the connecting rod (527) is respectively hinged to the first positioning plate (523) and the second positioning plate (524); The clamping assembly (53) comprises a first cylinder (531), a second cylinder (532), a crossbeam (533) and a clamping plate (534); the first cylinder (531) is fixedly connected to the slide table (33); the output end of the first cylinder (531) is transmission-connected to the crossbeam (533); the second cylinder (532) is fixedly connected to the crossbeam (533); the output end of the second cylinder (532) is ball-jointed to the clamping plate (534); a positioning block (535) is provided on one side of the clamping plate (534) facing the positioning assembly (52); the diameter of the positioning block (535) matches the diameter of the shaft sleeve (526).

2. The PTC electric heater shovel-tooth structure cutting device with intelligent positioning function according to claim 1 is characterized in that: The workbench (2) is provided with a transmission chamber (21) and a guide groove (22); the moving mechanism (3) comprises a transmission motor (31), a screw rod (32) and a slide table (33); the transmission motor (31) is tightly connected to the workbench (2); the output end of the transmission motor (31) is transmission-connected to the screw rod (32); the screw rod (32) is rotationally connected to the workbench (2); the screw rod (32) is transmission-connected to the slide table (33); the screw rod (32) is located in the transmission chamber (21); and the slide table (33) is slidably connected to the guide groove (22).

3. The PTC electric heater shovel-tooth structure cutting device with intelligent positioning function according to claim 1, characterized in that: The width of the first positioning plate (523) is greater than that of the second positioning plate (524).

4. The PTC electric heater shovel-tooth structure cutting device with intelligent positioning function according to claim 1, characterized in that: The rotating block (521) is provided with an annular flow channel (5213), the inlet of the annular flow channel (5213) is externally connected to a cooling liquid, the outlet of the annular flow channel (5213) faces the clamping plate (534), the clamping plate (534) is provided with a liquid outlet (5341), a plurality of recessed areas (5231) and raised areas (5232) are provided on the side of the first positioning plate (523) facing the transmission shaft (525), a cooling flow channel is formed between the two first positioning plates (523), and the first positioning plate (523) is provided with a cooling cavity (5233), a liquid inlet flow channel (5234) and The liquid outlet channel (5235) is located at a position corresponding to the raised area (5232) of the cooling cavity (5233); the liquid inlet channel (5234) and the liquid outlet channel (5235) are respectively connected to the cooling cavity (5233); the liquid inlet channel (5234) is located at the recessed area (5231); the liquid outlet channel (5235) is located at the raised area (5232); a temperature control component (54) is further provided on the first positioning plate (523); the temperature control component (54) is located at the liquid outlet channel (5235); and the temperature control component (54) is used to control the flow rate of the coolant in the cooling cavity (5233).

5. The PTC electric heater skived-tooth structure cutting device with intelligent positioning function according to claim 4, characterized in that: The temperature control component (54) comprises an electromagnet (541), an adjustment block (542), a return spring (543) and a thermistor (544); the first positioning plate (523) is provided with an adjustment slot (5236); the electromagnet (541) is firmly connected to the adjustment slot (5236); the adjustment block (542) is slidably connected to the adjustment slot (5236); the adjustment block (542) is provided with a flow hole (5421); the adjustment block (542) 542) is made of ferromagnetic material, the flow hole (5421) and the liquid outlet channel (5235) are eccentrically arranged, one end of the return spring (543) is tightly connected to the adjustment block (542), the other end of the return spring (543) is tightly connected to the inner wall of the adjustment groove (5236), the thermistor (544) is tightly connected to the inner wall of the liquid outlet channel (5235), and the thermistor (544) is electrically connected to the electromagnet (541).

6. The PTC electric heater shovel-tooth structure cutting device with intelligent positioning function according to claim 1, characterized in that: The cutting mechanism (4) comprises a bracket (41), a power cylinder (42) and a cutter (43); the bracket (41) is firmly connected to the workbench (2); the power cylinder (42) is firmly connected to the bracket (41); the output end of the power cylinder (42) is drivingly connected to the cutter (43); a sliding groove is provided on the bracket (41); and the cutter (43) is slidably connected to the sliding groove.

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