Powerful water-cooling grinding head and excircle sharpening machine comprising same

Abstract

The invention discloses a powerful water-cooling grinding head and an outer circle sharpening machine comprising the powerful water-cooling grinding head, the powerful water-cooling grinding head belongs to the technical field of sharpening machines, the powerful water-cooling grinding head comprises a grinding head assembly and a supporting assembly used for supporting the grinding head assembly, and the grinding head assembly is provided with a dual-mode cooling unit. The grinding head assembly is subjected to liquid cooling and mist cooling through the dual-mode cooling unit, and the grinding head assembly is provided with a recovery unit used for recovering redundant cooling liquid; the grinding head assembly comprises a grinding head, vortex-shaped main grooves are formed in the side faces of the grinding head, and radial auxiliary grooves are formed in the side faces of the grinding head. According to the grinding head, the vortex-shaped main grooves and the radial auxiliary grooves are formed in the grinding head, distribution and flowing of cooling liquid on the surface of the grinding head are optimized, the cooling effect is enhanced, the dual-mode cooling unit combines liquid cooling and fog cooling, the temperature of the grinding head is effectively reduced, grinding head abrasion is reduced, the service life of the grinding head is prolonged, and the grinding precision of the grinding head is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machines, in particular to a powerful water-cooled grinding head and an external cylindrical grinding machine containing the same. Background Art

[0002] In the process of hot rolling of steel, it is inevitable that there are defects such as cracks, scratches, and indentations on the surface. Such defects can be removed by grinding. Grinding can be carried out by manual grinding, mechanical grinding or shot blasting. Among them, the grinding machine is one of the most effective measures to remove such defects. The grinding head is the core of the grinding machine. The motor drives the special high-speed heavy-load grinding wheel to rotate. The grinding wheel contacts the steel billet with a certain pressure under the action of the hydraulic cylinder to grind off a layer of metal on the surface of the steel billet. Grinding when the temperature of the steel billet is 700℃-900℃ can improve the grinding efficiency and reduce the consumption of heat energy, electricity energy and steel in the production process of stainless steel.

[0003] For example, the announcement number is CN210452303U The Chinese utility model patent discloses a self-cooling grinding head of a high-temperature billet grinding machine, comprising: a grinding head shell, a condenser, a high-pressure water pump and a pipeline; the pipeline is connected to the grinding head shell, the condenser and the high-pressure water pump in sequence; a serpentine hole composed of a plurality of connected U-shaped holes is provided on the arc portion of the grinding head shell near its edge, and a water inlet hole and a water outlet hole at both ends of the serpentine hole are provided on the other side of the grinding head shell relative to the grinding wheel, the water inlet hole and the water outlet hole are respectively connected to the water inlet hole and the water outlet hole. The water inlet hole and the water outlet hole are sink threaded holes, and the pipeline is threadedly connected to the water inlet hole and the water outlet hole respectively.

[0004] The above solution has the following shortcomings in actual use:

[0005] This solution adopts an improvement on the grinding head. A serpentine hole is opened in the grinding head shell. The serpentine hole circulates the condenser and the high-pressure water pump through the pipeline. Under the action of the high-pressure pump, the water condensed by the condenser circulates in the serpentine hole, taking away the heat generated by grinding and reducing the temperature of the grinding head. However, in actual use, the water-cooled grinding head has a complex structure and the coolant is unevenly distributed, which can easily cause thermal stress concentration and affect the processing accuracy and the service life of the grinding head. Summary of the invention

[0006] The object of the present invention is to provide a powerful water-cooled grinding head and a cylindrical grinding machine containing the same, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A powerful water-cooled grinding head comprises a grinding head assembly and a supporting assembly for supporting the grinding head assembly, wherein the grinding head assembly is provided with a dual-mode cooling unit, through which the grinding head assembly is liquid cooled and mist cooled, and the grinding head assembly is provided with a recovery unit for recovering excess coolant; the grinding head assembly comprises a grinding head, the sides of which are provided with main grooves in a vortex shape, and the sides of which are provided with auxiliary grooves in a radial shape.

[0009] Preferably, the inner wall of the main groove is coated with a lyophilic coating, and the inner wall surface of the auxiliary groove is coated with a hydrophobic coating with a depth of 0.1-0.3mm. The depth of the main groove is 0.5-2mm, the width is 1-3mm and the groove spacing is 3-8mm. The depth of the auxiliary groove is 0.3-1mm and the width is 0.5-1.5mm.

[0010] Preferably, the support assembly includes a fixed seat, a cylinder is rotatably connected to the fixed seat, an output end of the cylinder is rotatably connected to a mounting arm, a middle portion of the mounting arm is rotatably connected to a bracket via a rotating shaft, and an end portion of the mounting arm is provided with a motor group for driving the grinding head assembly.

[0011] Preferably, the dual-mode cooling unit includes a liquid storage tank, a pump body is arranged on the top of the liquid storage tank, a liquid outlet of the pump body is provided with a liquid delivery pipe, the end of the liquid delivery pipe is connected to a connecting pipe 1, a plurality of liquid outlet nozzles are connected to the connecting pipe 1 through a plurality of liquid outlet pipes, and the liquid outlet nozzles are arranged at an angle.

[0012] Preferably, a liquid delivery branch is provided on the liquid delivery pipeline, an atomizer is provided at the end of the liquid delivery branch, the outlet end of the atomizer is connected to a mixing box through a mist delivery pipe, an air compressor is provided on one side of the liquid storage tank, an air delivery pipeline is provided at the air outlet end of the air compressor, a diverter is provided at the end of the air delivery pipeline, one of the outlets of the diverter is connected to the mixing box, a mixing pipe is provided at the outlet of the mixing box, a connecting pipe is provided at the end of the mixing pipe, the connecting pipe two is connected to multiple mist outlet nozzles through multiple mist outlet pipes, the other outlet of the diverter is connected to an air delivery branch, the outlet side of the air delivery branch is connected to a connecting pipe three, and the connecting pipe three is connected to multiple high-pressure nozzles through multiple exhaust pipes.

[0013] Preferably, the grinding head is provided with a shell, and the outer side of the shell is connected with three sockets through three plug-in frames, and the sockets are used to fix connecting pipe one, connecting pipe two and connecting pipe three respectively, and the liquid delivery pipeline, mixing pipeline and air delivery branch pipe are provided with a wire management shell.

[0014] Preferably, the recovery unit includes a recovery box, a recovery pipe is provided on the top of the recovery box, a recovery cover is provided on the end of the recovery pipe, a recovery seat is provided on the inner wall of the shell, a recovery cavity connected to the recovery cover is opened in the recovery seat, a coarse filter plate is provided on the upper part of the inner wall of the recovery box, a plurality of magnets are provided on the lower surface of the coarse filter plate, an oil-liquid separation membrane, a fine filter plate and a plasma generator are provided in the middle part of the inner wall of the recovery box from top to bottom, a liquid inlet pipe is provided between the recovery box and the liquid storage tank, and a valve is provided on the liquid inlet pipe.

[0015] A cylindrical grinding machine comprises a base, one side of the upper surface of the base is provided with a workpiece clamping unit and a control unit for clamping a workpiece, and the other side of the upper surface of the base is provided with a strong water-cooled grinding head.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention optimizes the distribution and flow of coolant on the surface of the grinding head and enhances the cooling effect by providing a vortex-shaped main groove and a radial auxiliary groove on the grinding head. The dual-mode cooling unit combines liquid cooling and mist cooling to quickly take away a large amount of heat generated during grinding of the grinding head, effectively reduce the temperature of the grinding head, reduce the wear of the grinding head, and improve the service life and grinding accuracy of the grinding head. The recovery unit recovers, filters, separates and purifies excess coolant for recycling, thereby reducing coolant waste, reducing production costs, and reducing the pollution to the environment caused by coolant emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the grinding head assembly and the supporting assembly of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the dual-mode cooling unit and the recovery unit of the present invention;

[0021] Figure 4 for Figure 3 Side view of

[0022] Figure 5 It is a structural schematic diagram of the dual-mode cooling unit of the present invention;

[0023] Figure 6 It is a structural disassembly diagram of the recovery unit of the present invention;

[0024] Figure 7 It is a structural stereogram of the external cylindrical grinding machine of the present invention.

[0025] In the figure:

[0026] 100, grinding head assembly; 101, grinding head; 102, main groove; 103, auxiliary groove; 200, support assembly; 201, fixed seat; 202, cylinder; 203, mounting arm; 204, motor group; 205, bracket; 300, dual-mode cooling unit; 301, liquid storage tank; 302, pump body; 303, liquid delivery pipeline; 304, connecting pipe 1; 305, liquid outlet pipe; 306, liquid outlet nozzle; 307, liquid delivery branch pipe; 308, atomizer; 309, mist delivery pipeline; 310, mixing box; 311, air compressor; 312, air delivery pipeline; 313, splitter; 314, mixing pipeline; 315, connecting pipe 2; 3 16. Mist outlet pipe; 317. Mist outlet nozzle; 318. Air supply branch pipe; 319. Connecting pipe three; 320. Exhaust pipe; 321. High-pressure nozzle; 322. Plug-in socket; 323. Plug-in frame; 324. Solenoid valve; 325. Cable management shell; 326. Shell; 400. Recovery unit; 401. Recovery box; 402. Recovery pipe; 403. Recovery seat; 404. Recovery cavity; 405. Recovery cover; 406. Coarse filter plate; 407. Magnet; 408. Oil-liquid separation membrane; 409. Fine filter plate; 410. Plasma generator; 411. Liquid inlet pipe; 1. Base; 2. Workpiece clamping unit; 3. Control unit. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 7 , the present invention provides a technical solution:

[0029] like Figure 1 and Figure 2 As shown, the powerful water-cooled grinding head includes a grinding head assembly 100 and a supporting assembly 200 for supporting the grinding head assembly 100. The grinding head assembly 100 is provided with a dual-mode cooling unit 300. The dual-mode cooling unit 300 combines liquid cooling and mist cooling to quickly take away a large amount of heat generated by the grinding head 101 during grinding, effectively reduce the temperature of the grinding head 101, reduce the wear of the grinding head 101, and improve the service life and grinding accuracy of the grinding head 101. The grinding head assembly 100 is liquid-cooled and mist-cooled by the dual-mode cooling unit 300. The grinding head assembly 100 is provided with a recovery unit 400 for recovering excess coolant. The excess coolant is recycled after being recovered, filtered, separated and purified, thereby reducing coolant waste, reducing production costs, and reducing the pollution of the environment by coolant emissions.

[0030] Furthermore, the grinding head assembly 100 includes a grinding head 101, and the sides of the grinding head 101 are provided with main grooves 102 in a vortex shape, and the sides of the grinding head 101 are provided with auxiliary grooves 103 in a radial shape, which optimize the flow path and heat exchange efficiency of the coolant / aerosol, so that it can cooperate with the dual-mode cooling unit 300. The main grooves 102 guide the coolant to diffuse evenly along the path, covering the entire grinding contact area, enhancing the heat exchange time between the liquid and the grinding head surface, and improving the heat dissipation efficiency. The auxiliary grooves 103 can guide the atomized particles to penetrate into the grinding micro-area in the aerosol cooling mode, prevent the accumulation of grinding chips, and reduce secondary scratches on the workpiece.

[0031] Furthermore, the inner wall of the main groove 102 is coated with a lyophilic coating to promote liquid spreading, and the inner wall surface of the auxiliary groove 103 is coated with a hydrophobic coating to guide the directional flow of the mist. In actual use, titanium nitride or diamond-like coating is deposited on the surface of the main groove 102 and the auxiliary groove 103 to improve thermal conductivity, so that the thermal conductivity coefficient is ≥50W / m·K, and accelerate the transfer of heat from the grinding head substrate to the cooling medium. The surface of the grinding head 101 is also provided with a honeycomb micro-groove network with a depth of 0.1-0.3mm. The main groove 102 has a depth of 0.5-2mm, a width of 1-3mm and a groove spacing of 3-8mm. The depth of the auxiliary groove 103 is 0.3-1mm and the width is 0.5-1.5mm. Specifically, in actual use, the depth of the main groove 102 and the auxiliary groove 103 can be adjusted to match the cooling requirements under different loads.

[0032] Furthermore, the support assembly 200 includes a fixed base 201, to which a cylinder 202 is rotatably connected, an output end of the cylinder 202 is rotatably connected to a mounting arm 203, a middle portion of the mounting arm 203 is rotatably connected to a bracket 205 via a rotating shaft, and an end portion of the mounting arm 203 is provided with a motor group 204 for driving the grinding head assembly 100.

[0033] like Figure 3-Figure 5 As shown, the dual-mode cooling unit 300 includes a liquid storage tank 301, a pump body 302 is arranged on the top of the liquid storage tank 301, a liquid delivery pipe 303 is arranged at the liquid outlet of the pump body 302, a connecting pipe 1 304 is connected to the end of the liquid delivery pipe 303, and a plurality of liquid outlet nozzles 306 are connected to the connecting pipe 1 304 through a plurality of liquid outlet pipes 305, and the liquid outlet nozzles 306 are arranged at an angle.

[0034] Furthermore, a liquid delivery branch pipe 307 is provided on the liquid delivery pipe 303, an atomizer 308 is provided at the end of the liquid delivery branch pipe 307, and the outlet end of the atomizer 308 is connected to a mixing box 310 through a mist delivery pipe 309. An air compressor 311 is provided on one side of the liquid storage tank 301, and an air delivery pipe 312 is provided at the air outlet end of the air compressor 311. A splitter 313 is provided at the end of the air delivery pipe 312, and one of the outlets of the splitter 313 is connected to the mixing box 310. A mixing pipe 314 is provided at the outlet of the mixing box 310. The mixing pipe 314 A connecting pipe 2 315 is provided at the end thereof, and the connecting pipe 2 315 is connected to a plurality of mist outlet nozzles 317 through a plurality of mist outlet pipes 316 to realize mist cooling and auxiliary chip removal. The other outlet of the diverter 313 is connected to an air supply branch pipe 318, and the outlet side of the air supply branch pipe 318 is connected to a connecting pipe 3 319, and the connecting pipe 319 is connected to a plurality of high-pressure nozzles 321 through a plurality of exhaust pipes 320. The high-pressure gas ejected by the high-pressure nozzles 321 can not only perform preliminary cooling on the grinding head 101 but also clean the iron chips attached to the grinding head 101.

[0035] Furthermore, a shell 326 is sleeved on the grinding head 101, and three sockets 322 are connected to the outer side of the shell 326 through three sockets 323. The sockets 322 are respectively used to fix connecting pipe 1 304, connecting pipe 2 315 and connecting pipe 3 319. A wire management shell 325 is provided on the liquid delivery pipeline 303, the mixing pipeline 314 and the air delivery branch pipe 318. The liquid delivery pipeline 303, the liquid delivery branch pipe 307, the mist delivery pipeline 309, the air delivery pipeline 312, the mixing pipeline 314 and the air delivery branch pipe 318 are all provided with solenoid valves 324 for controlling the circulation of liquid or gas.

[0036] like Figure 6 As shown, the recovery unit 400 includes a recovery box 401, a recovery pipe 402 is arranged on the top of the recovery box 401, a recovery cover 405 is arranged at the end of the recovery pipe 402, a recovery seat 403 is arranged on the inner wall of the shell 326, and a recovery cavity 404 connected to the recovery cover 405 is opened in the recovery seat 403. A coarse filter plate 406 is arranged on the upper part of the inner wall of the recovery box 401 to remove large particles of metal chips, abrasive particles and debris. A plurality of magnets 407 are arranged on the lower surface of the coarse filter plate 406 to absorb iron chips in the waste liquid. 01 The middle part of the inner wall is provided with an oil-liquid separation membrane 408, a fine filter plate 409 and a plasma generator 410 from top to bottom. The oil-liquid separation membrane 408 is used to separate free oil, emulsified oil and suspended oil in the coolant. The fine filter plate 409 is used to remove tiny particles and colloidal pollutants. The plasma generator 410 is used to decompose organic matter and bacteria in the coolant without the need for chemical agents. A liquid inlet pipe 411 is provided between the recovery box 401 and the liquid storage tank 301. A valve is provided on the liquid inlet pipe 411 to realize the recovery and recycling of the coolant.

[0037] It should be noted that the high-pressure nozzle 321 , the liquid nozzle 306 and the mist nozzle 317 are sequentially arranged along the rotation direction of the grinding head 101 .

[0038] like Figure 7 As shown, an external cylindrical grinding machine comprises a base 1, one side of the upper surface of the base 1 is provided with a workpiece clamping unit 2 and a control unit 3 for clamping a workpiece, and the other side of the upper surface of the base 1 is provided with a powerful water-cooled grinding head.

[0039] The working process of this embodiment is as follows: start the cylindrical grinding machine, the control unit 3 controls the workpiece clamping unit 2 to clamp the workpiece to be ground, start the motor group 204, drive the grinding head 101 to rotate at high speed, turn on the dual-mode cooling unit 300, and set a temperature sensor in the shell 326 to monitor the temperature of the grinding head 101. When the temperature of the grinding head 101 is lower than the preset value, one of the compressed air generated by the air compressor 311 is ejected through the air supply branch pipe 318, the connecting pipe 319, the exhaust pipe 320 and the high-pressure nozzle 321 to assist in chip removal and perform preliminary cooling. In this process, the pump body 302 injects the coolant in the liquid storage tank 301 into the atomizer 308 through the liquid delivery pipe 303 and the liquid delivery branch pipe 307. The atomizer 308 atomizes the coolant and injects it into the mixing box 310. The other gas passes through the gas delivery pipe 312 and the diverter 313, and is mixed with the atomized liquid produced by the atomizer 308 in the mixing box 310. The gas is sprayed out through the mixing pipe 314, the connecting pipe 315 and the mist nozzle 317 for mist cooling. When the temperature of the grinding head 101 is higher than the preset value, the pump body 302 injects the coolant in the liquid storage tank 301 through the liquid delivery pipe 303, the connecting pipe 307 and the mist nozzle 317. 4 and the liquid outlet nozzle 306 are sprayed onto the surface of the grinding head 101 for liquid cooling, thereby forming a triple cooling effect on the grinding head 101. During the grinding process of the grinding head 101, the excess coolant and debris generated are collected by the recovery cover 405 and enter the recovery box 401 through the recovery pipe 402. In the recovery box 401, the coarse filter plate 406 filters large particles of impurities, the magnet 407 absorbs ferromagnetic impurities, the oil separation membrane 408 separates the oil, and the fine filter plate 409 further filters the tiny particles. The plasma generator 410 purifies the coolant, and the treated coolant can be The liquid is returned to the liquid storage tank 301 for recycling through the liquid inlet pipe 411. According to the grinding situation, the control unit 3 can adjust the speed of the motor group 204 and the stroke of the cylinder 202 to adjust the position and angle of the grinding head 101, as well as control the coolant flow rate, atomizing gas flow rate and other parameters of the dual-mode cooling unit 300 to ensure that the grinding work is carried out efficiently and accurately. During use, the filter components of the recovery unit 400 are regularly cleaned, the adsorption saturated magnet 407 and the lost filter material are replaced to ensure the recovery effect, and the lubrication condition and operating status of the motor group 204 are regularly checked to ensure its normal operation.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Powerful water-cooled grinding head, characterized by: The invention comprises a grinding head assembly and a supporting assembly for supporting the grinding head assembly, wherein the grinding head assembly is provided with a dual-mode cooling unit, through which the grinding head assembly is subjected to liquid cooling and mist cooling, and the grinding head assembly is provided with a recovery unit for recovering excess coolant; The grinding head assembly comprises a grinding head, the sides of the grinding head are provided with main grooves in a spiral shape, and the sides of the grinding head are provided with auxiliary grooves in a radial shape.

2. The powerful water-cooled grinding head according to claim 1, characterized in that: The inner wall of the main groove is coated with a liquid-philic coating, and the inner wall surface of the auxiliary groove is coated with a hydrophobic coating with a depth of 0.1-0.3mm. The depth of the main groove is 0.5-2mm, the width is 1-3mm and the groove spacing is 3-8mm. The depth of the auxiliary groove is 0.3-1mm and the width is 0.5-1.5mm.

3. The powerful water-cooled grinding head according to claim 1, characterized in that: The support assembly includes a fixed seat, a cylinder is rotatably connected to the fixed seat, an output end of the cylinder is rotatably connected to a mounting arm, a middle portion of the mounting arm is rotatably connected to a bracket via a rotating shaft, and an end portion of the mounting arm is provided with a motor group for driving the grinding head assembly.

4. The powerful water-cooled grinding head according to claim 1, characterized in that: The dual-mode cooling unit includes a liquid storage tank, a pump body is arranged on the top of the liquid storage tank, a liquid delivery pipe is arranged at the liquid outlet of the pump body, a connecting pipe 1 is connected to the end of the liquid delivery pipe, a plurality of liquid outlet nozzles are connected to the connecting pipe 1 through a plurality of liquid outlet pipes, and the liquid outlet nozzles are arranged at an angle.

5. The powerful water-cooled grinding head according to claim 4, characterized in that: A liquid delivery branch is provided on the liquid delivery pipeline, an atomizer is provided at the end of the liquid delivery branch, the outlet end of the atomizer is connected to a mixing box through a mist delivery pipeline, an air compressor is provided on one side of the liquid storage tank, an air delivery pipeline is provided at the air outlet end of the air compressor, a diverter is provided at the end of the air delivery pipeline, one of the outlets of the diverter is connected to the mixing box, a mixing pipeline is provided at the outlet of the mixing box, a connecting pipe 2 is provided at the end of the mixing pipeline, the connecting pipe 2 is connected to a plurality of mist outlet nozzles through a plurality of mist outlet pipes, the other outlet of the diverter is connected to an air delivery branch, the outlet side of the air delivery branch is connected to a connecting pipe 3, and the connecting pipe 3 is connected to a plurality of high-pressure nozzles through a plurality of exhaust pipes.

6. The powerful water-cooled grinding head according to claim 5, characterized in that: The grinding head is covered with a shell, and the outer side of the shell is connected with three sockets through three plug-in frames. The sockets are used to fix connecting pipe one, connecting pipe two and connecting pipe three respectively. The liquid delivery pipeline, mixing pipeline and air delivery branch pipe are provided with a wire management shell.

7. The powerful water-cooled grinding head according to claim 6, characterized in that: The recovery unit includes a recovery box, a recovery pipe is arranged on the top of the recovery box, a recovery cover is arranged on the end of the recovery pipe, a recovery seat is arranged on the inner wall of the shell, a recovery cavity connected with the recovery cover is opened in the recovery seat, a coarse filter plate is arranged on the upper part of the inner wall of the recovery box, a plurality of magnets are arranged on the lower surface of the coarse filter plate, an oil-liquid separation membrane, a fine filter plate and a plasma generator are arranged in sequence from top to bottom in the middle part of the inner wall of the recovery box, a liquid inlet pipe is arranged between the recovery box and the liquid storage tank, and a valve is arranged on the liquid inlet pipe.

8. An external cylindrical grinding machine, characterized in that: It comprises a base, one side of the upper surface of the base is provided with a workpiece clamping unit and a control unit for clamping the workpiece, and the other side of the upper surface of the base is provided with a powerful water-cooled grinding head as described in any one of claims 1-7.

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