A cutting, drilling and grinding combined machine tool for furniture panel processing

Abstract

The present invention relates to a cutting, drilling and grinding combination machine tool for processing furniture panels, comprising a bed, an X-axis travel mechanism, a Y-axis travel mechanism, a Z-axis travel mechanism, and a processing head. The processing head comprises a cutting station, a drilling and grinding station, and a dual-output shaft motor. The drilling and grinding station comprises a main shaft, the lower end of which is detachably connected to a drill bit or a grinding disc. The top of the bed is provided with at least one set of ultrasonic megasonic bearing platforms for generating ultrasonic vibration and megasonic vibration and adapting the ultrasonic vibration and megasonic vibration. The present invention has multiple functions of cutting, drilling and grinding, and can process both metal panels and wooden panels, and can effectively improve processing efficiency and processing quality; the cutting operation is performed by cooperating with the cutting station and the ultrasonic megasonic bearing platform, which can significantly improve the chip removal capacity of the saw blade; the drilling operation is performed by cooperating with the drilling and grinding station and the ultrasonic megasonic bearing platform, which can increase the drilling rate and reduce the wear of the sandpaper.

Description

Technical Field

[0001] The invention relates to a cutting, drilling and grinding combined machine tool for furniture plate processing, belonging to the technical field of furniture processing machine tools. Background Art

[0002] In the field of furniture board processing, a sawing machine is usually used to saw the wood boards, a drilling machine is generally used to drill holes in the wood boards, and a grinder is used to grind the wood boards.

[0003] When sawing or cutting wood, the friction between the blade and the material causes the woodworking saw blade to heat up. When the temperature exceeds the ignition point of the material, the surface of the woodworking saw blade becomes burnt, and the cut material will turn black. The main reason for this problem is that the number of teeth on the saw blade is designed according to the cutting capacity. The more teeth, the greater the cutting capacity. However, the chip removal capacity is reduced. If the debris cannot be removed in time, the saw teeth will instantly burn the cut surface during high-speed cutting. The harmful effects of this phenomenon are, first, shortening the service life of the saw teeth. Second, and most importantly, it can cause the cut surface of the wood to become burnt and blackened, significantly affecting the appearance of the wood. In addition, the burnt surface produces a large amount of smoke, making the processing workshop environment very harsh.

[0004] Current saw blade designs aim to maximize both cutting capacity and chip removal, but this is only effective when cutting dry wood. For wet wood (such as wood that has been soaked or exposed to water, or wood with excessive moisture content due to high humidity), chip removal performance is significantly reduced during cutting, making it very easy for the wood to burn and turn black. The current solution is to sun-dry or oven-dry the wood before cutting, which is very time-consuming and energy-intensive.

[0005] Many furniture panels are made of metal, such as stainless steel, aluminum alloy, titanium alloy, and carbon steel. Stainless steel, in particular, has significantly poorer machinability than carbon steel, with austenitic and austenitic + ferritic stainless steels being particularly poor. This is primarily due to stainless steel's high plasticity and toughness, which creates continuous chips during machining, hindering smooth operation and damaging the machined surface. Under high temperatures and pressures, stainless steel exhibits poor chip evacuation, leading to the formation of built-up edge (BUE), which increases tool wear and causes tearing, deteriorating the machined surface. This is particularly evident with martensitic stainless steel, which has a lower carbon content.

[0006] When using a sander to sand wooden boards, existing sanders usually perform intermittent sanding, that is, after sanding for 1 to 5 minutes, it is necessary to stop sanding and then use compressed air to blow away the wood chips generated by sanding to prevent excessive wood chips from accumulating between the grinding disc and the wooden board, causing excessive wear of the sandpaper and thus premature scrapping.

[0007] If cutting, drilling and grinding can be combined on one machine tool, the equipment purchase cost can be effectively reduced and processing efficiency can be improved. Therefore, the present invention is proposed; and it is very necessary to optimize the design of some defects of existing sawing machines, drilling machines and grinding machines. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the present invention provides a cutting, drilling and grinding combined machine tool for furniture board processing. The specific technical solution is as follows:

[0009] A cutting, drilling and grinding combination machine tool for processing furniture panels is used to perform cutting, drilling or grinding operations on furniture panels. The cutting, drilling and grinding combination machine tool for processing furniture panels includes a bed, an X-axis walking mechanism, a Y-axis walking mechanism, a Z-axis walking mechanism, and a processing head. A clamping assembly is arranged along the Y-axis direction of the bed, the clamping assembly includes two plywood and a first driving mechanism for driving the plywood to perform translational motion, the processing head includes a cutting station, a drilling and grinding station, and a dual-output shaft motor, the cutting station includes a saw blade, the drilling and grinding station includes a main shaft, the lower end of the main shaft is detachably connected to a drill bit or a grinding disc, and the saw blade and the main shaft are both driven to rotate by a dual-output shaft motor; the top of the bed is provided with at least one group of ultrasonic and megasonic bearing platforms for generating ultrasonic vibration and megasonic vibration and adapting the ultrasonic vibration and megasonic vibration.

[0010] A further improvement is that the ultrasonic megasonic bearing platform includes a trough shell and a table block with a right-angled triangle cross section, the bottom of the trough shell is fixedly connected to the bed; the table block is provided with a first right-angled side wall, a second right-angled side wall and a horizontally arranged oblique side wall, and circular limiting shafts are provided on the front and rear sides of the table block; the top of the trough shell is also provided with a triangular groove with a right-angled triangle cross section and matching the table block, the triangular groove is provided with a first oblique wall parallel to the first right-angled side wall, and a second oblique wall parallel to the second right-angled side wall, An iron ball accommodating cavity is provided between the first right-angled side wall and the first inclined surface wall, and between the second right-angled side wall and the second inclined surface wall. The iron ball accommodating cavity is filled with a plurality of iron balls. The iron ball accommodating cavity is also filled with a non-Newtonian fluid lubricating medium. A ball spacer is provided at the junction between the first inclined surface wall and the second inclined surface wall. The groove wall of the triangular groove is also provided with a limiting circular hole adapted to the limiting axis; a megasonic transducer array is provided on the outer side of the first inclined surface wall, and an ultrasonic transducer array is provided on the outer side of the second inclined surface wall.

[0011] As a further improvement, the interior of the trough shell is provided with a first holding chamber for accommodating the megasonic transducer array, a second holding chamber for accommodating the ultrasonic transducer array, and an electromagnet plate for separating the first holding chamber and the second holding chamber. The bottom of the triangular trough and the bottom of the trough shell are welded and sealed by the electromagnet plate. The interiors of the first holding chamber and the second holding chamber are both filled with water, and the first inclined wall, the second inclined wall and the table block are all made of iron material.

[0012] As a further improvement, the diameter of the limiting circular hole is larger than the diameter of the limiting shaft, and the difference between the diameter of the limiting circular hole and the diameter of the limiting shaft is x, 0.3mm≤x≤1mm.

[0013] As a further improvement, the method for preparing the non-Newtonian fluid lubricating medium includes the following steps:

[0014] Step S1, dissolving 7.5 parts by mass of cobalt nitrate in 300-500 parts by mass of water to obtain a cobalt nitrate solution, pouring 15 parts by mass of attapulgite into the cobalt nitrate solution and stirring and mixing at a temperature of 60±3° C. to obtain a first mixture; adding 36 parts by mass of a 12% sodium borohydride solution to the first mixture, stirring and reacting for 1-2 hours, filtering, washing until neutral, and drying to obtain pretreated attapulgite;

[0015] Step S2, stirring 10 parts by mass of pretreated attapulgite and 15-16 parts by mass of ionic liquid at a temperature of 120-125° C. for 1-2 hours, drying, and ball milling to obtain modified attapulgite; the ionic liquid is prepared by mixing 11 parts by mass of 1-butyl-2,3-dimethylimidazolium thiocyanate and 89 parts by mass of water;

[0016] Step S3, mixing 100 parts by mass of lithium-based grease, 5 to 50 parts by mass of glycerol, 7 to 9 parts by mass of modified attapulgite, and 0.3 parts by mass of triethylaluminum, stirring and reacting the mixture under microwave radiation with a power of 350 to 390 W for 2 to 3 hours to obtain the non-Newtonian fluid lubrication medium.

[0017] As a further improvement, the ratio of the length of the first right-angled side wall to the length of the second right-angled side wall is 2.3:1, and the diameter of the iron ball is 3.1-3.3 mm.

[0018] A further improvement is that when the furniture plate is a metal plate, the drill bit performs a drilling operation on the metal plate, the frequency of the megasonic transducer array is 870kHz, the power of the megasonic transducer array is 110W, the frequency of the ultrasonic transducer array is 56kHz, and the power of the ultrasonic transducer array is 0.3kW;

[0019] When the furniture board is a wooden board, when the saw blade performs a cutting operation on the wooden board, the frequency of the megasonic transducer array is 1200 kHz, the power of the megasonic transducer array is 325 W, the frequency of the ultrasonic transducer array is 20 kHz, and the power of the ultrasonic transducer array is 2.1 kW;

[0020] When the furniture board is a wooden board, the mesh size of the sandpaper connected to the bottom of the grinding wheel is 150~360 mesh; the rotation speed of the grinding wheel is ω, unit is r / min; the frequency of the megasonic transducer array is f1, unit is kHz, and the power of the megasonic transducer array is 850W; the frequency of the ultrasonic transducer array is f2, unit is kHz, and the power of the ultrasonic transducer array is 120W; ω=λf1+βf2, 1.05≤λ≤1.21, 20≤β≤40, 28.5≤f1 / f2≤37.1.

[0021] As a further improvement, a ball baffle for blocking the iron ball is installed on the upper end of the first slanted wall and the upper end of the second slanted wall, and a gap is provided between the ball baffle and the side wall of the table block.

[0022] As a further improvement, the saw blade is arranged along the X-axis or Y-axis direction of the bed, and the main shaft rotates along the Z-axis direction of the bed; the connection between the first output shaft of the dual-output shaft motor and the saw blade is one of the following: a transmission belt and a pulley, or a transmission chain and a sprocket; the second output shaft of the dual-output shaft motor is connected to the main shaft through two sets of bevel gears, and the processing head also includes a second drive mechanism for lifting and lowering the main shaft.

[0023] As a further improvement, a plurality of chip collecting grooves are provided on the top of the bed, and the chip collecting grooves are all connected to the negative pressure dust suction pipe.

[0024] Beneficial effects of the present invention:

[0025] 1. The cutting, drilling and grinding combination machine tool for furniture panel processing has multiple functions of cutting, drilling and grinding, and can process both metal panels and wooden panels. It is very suitable for processing operations in the furniture field, especially in the field of smart furniture, and can effectively improve processing efficiency and processing quality.

[0026] 2. In the present invention, the cutting operation is carried out in combination with the cutting station and the ultrasonic megasonic bearing platform, which can significantly improve the chip removal capacity of the saw blade; when the wooden board is moistened, it can significantly reduce the burning and blackening of the cut surface of the wet wooden board during cutting.

[0027] 3. Using a drilling and grinding station and an ultrasonic megasonic bearing platform to perform drilling operations can improve the drilling rate of the drill bit to a certain extent.

[0028] 4. The use of drilling and grinding stations and ultrasonic megasonic bearing platforms for grinding operations can also reduce the wear of sandpaper to a certain extent and further improve the grinding efficiency.

[0029] 5. The present invention generates less smoke during the processing operation. In addition, it can effectively remove the dust and wood chips generated during the processing in a timely manner, thereby improving the air quality in the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the cutting, drilling and grinding combined machine tool for furniture board processing according to the present invention;

[0031] Figure 2 This is a transmission principle diagram of the saw blade, dual output shaft motor, and main shaft of the present invention;

[0032] Figure 3 Schematic diagram of the structure of the ultrasonic megasonic bearing platform of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the platform block of the present invention;

[0034] Figure 5 Schematic diagram of the interior of the triangular groove of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. Example 1

[0038] like Figures 1-3 As shown, the cutting, drilling and grinding combination machine tool for furniture panel processing is used to perform cutting, drilling or grinding operations on furniture panel 40. The cutting, drilling and grinding combination machine tool for furniture panel processing includes a bed 1, an X-axis walking mechanism, a Y-axis walking mechanism 2, a Z-axis walking mechanism 3, and a processing head 4. The processing head 4 is driven by the X-axis walking mechanism to perform translational motion along the X-axis of the bed 1 (such as the length direction of the bed 1), the processing head 4 is driven by the Y-axis walking mechanism 2 to perform translational motion along the Y-axis of the bed 1 (such as the width direction of the bed 1), and the processing head 4 is driven by the Z-axis walking mechanism 3 to perform translational motion along the Z-axis of the bed 1 (such as the length direction of the bed 1). The machine body 1 is provided with a clamping assembly along the Y-axis direction, and the clamping assembly includes two clamping plates 5 and a first driving mechanism 6 for driving the clamping plates 5 to perform translational movement; the processing head 4 includes a cutting station, a drilling and grinding station, and a dual-output shaft motor 42, the cutting station includes a saw blade 41, the drilling and grinding station includes a main shaft 43, the lower end of the main shaft 43 is detachably connected to a drill bit or a grinding disc, and the saw blade 41 and the main shaft 43 are driven to rotate by the dual-output shaft motor 42; the top of the bed 1 is provided with at least one group of ultrasonic and megasonic bearing platforms 7 for generating ultrasonic vibrations and megasonic vibrations and adapting the ultrasonic and megasonic vibrations.

[0039] When the furniture board 40 is transported to the ultrasonic megasonic support platform 7, the middle part of the furniture board 40 is supported by the ultrasonic megasonic support platform 7, and the two ends of the furniture board 40 are clamped by two clamping plates 5. The two clamping plates 5 move toward each other under the first driving mechanism 6 to clamp.

[0040] When the furniture board 40 is a wooden board, the wooden board can be cut by the saw blade 41 in the cutting station; a drill bit can be installed at the lower end of the main shaft 43 to drill holes in the wooden board; the drill bit installed at the lower end of the main shaft 43 can be removed and a grinding wheel can be installed to grind the wooden board.

[0041] The drilling and grinding station and the cutting station can be used alternately, and the lower end of the main shaft 43 in the drilling and grinding station can be installed with a drill bit or a grinding disc as needed.

[0042] When the furniture board 40 is a metal board, the saw blade 41 in the cutting station can be replaced with a cutting blade to cut the metal board; a drill bit can be installed at the lower end of the main shaft 43 to drill holes in the metal board; the drill bit installed at the lower end of the main shaft 43 can be removed and a grinding disc can be installed to grind the metal board. Example 2

[0043] In Example 1, the saw blade 41 is arranged along the X-axis or Y-axis direction of the bed 1, and the main shaft 43 rotates along the Z-axis direction of the bed 1; the connection method between the first output shaft of the dual-output shaft motor 42 and the saw blade 41 is one of the following: a transmission belt and a pulley, or a transmission chain and a sprocket; the second output shaft of the dual-output shaft motor 42 is connected to the main shaft 43 through two sets of bevel gears, and the processing head 4 also includes a second drive mechanism for lifting and lowering the main shaft 43.

[0044] First, when performing cutting operations at the cutting station, the second drive mechanism is used in conjunction with the main shaft sleeve to lift the main shaft 43 upward, thereby avoiding interference caused by the drill bit or grinding disc at the lower end of the main shaft 43. The two sets of bevel gears are in a separated state, and the second output shaft of the dual output shaft motor 42 is in an idling state.

[0045] When switching from the cutting station to the drilling or grinding station, the second drive mechanism cooperates with the spindle sleeve to lower the main shaft 43, so that the two sets of bevel gears are in meshing state. The second output shaft of the dual-output shaft motor 42 drives the main shaft 43 to rotate, thereby performing the drilling or grinding operation. At this time, the saw blade 41 is positioned higher than the drill bit or grinding disc to avoid interference. The saw blade 41 can be removed as needed.

[0046] Furthermore, the top of the bed 1 is provided with multiple chip collection troughs, each of which is connected to a negative pressure dust collection pipe. The chip collection troughs prevent interference during cutting and drilling. Furthermore, the suction force generated by the negative pressure dust collection pipe can largely remove dust or debris generated by cutting, drilling, and grinding operations, thereby effectively reducing dust content in the workshop. Example 3

[0047] like Figures 3-5As shown, the ultrasonic megasonic bearing platform 7 includes a trough shell 10 and a block 20 with a right-angled triangle cross section. The bottom of the trough shell 10 is fixedly connected to the bed 1; the block 20 is provided with a first right-angled side wall 21, a second right-angled side wall 22 and a horizontally arranged oblique side wall 24, and a circular limiting shaft 23 is provided on the front and rear sides of the block 20; the top of the trough shell 10 is also provided with a triangular groove with a right-angled triangle cross section and matching the block 20, and the triangular groove is provided with a first oblique wall 111 parallel to the first right-angled side wall 21 and a second oblique wall 112 parallel to the second right-angled side wall 22, and an iron ball accommodating cavity is provided between the first right-angled side wall 21 and the first oblique wall 111 and between the second right-angled side wall 22 and the second oblique wall 112. The iron ball accommodating cavity The cavity is filled with a number of iron balls 30, the iron balls 30 between the first right-angled side wall 21 and the first inclined wall 111 constitute a first ball layer, and the iron balls 30 between the second right-angled side wall 22 and the second inclined wall 112 constitute a second ball layer, and the iron ball accommodating cavity is also filled with a non-Newtonian fluid lubricating medium 31, and a ball spacer 18 is provided at the junction between the first inclined wall 111 and the second inclined wall 112 to separate the first ball layer and the second ball layer, and a gap is provided between the lower end of the block 20 and the ball spacer 18, and the groove wall of the triangular groove is also provided with a limiting circular hole 14 adapted to the limiting axis 23; a megasonic transducer array 16 is provided on the outer side of the first inclined wall 111, and an ultrasonic transducer array 17 is provided on the outer side of the second inclined wall 112.

[0048] The megasonic transducer array 16 is preferably made of 2kW high-power megasonic vibrators of Baoding Quanyi Electronic Equipment Co., Ltd.; the ultrasonic transducer array 17 is preferably made of 2kW high-power ultrasonic vibrators of Baoding Quanyi Electronic Equipment Co., Ltd.

[0049] The diameter of the limiting circular hole 14 is larger than the diameter of the limiting shaft 23. The difference between the diameters of the limiting circular hole 14 and the limiting shaft 23 is x, 0.3 mm ≤ x ≤ 1 mm, preferably x = 0.9 mm. The ratio of the length of the first right-angled side wall 21 to the length of the second right-angled side wall 22 is 2.3:1. The diameter of the iron ball 30 is 3.1-3.3 mm, preferably 3.1 mm.

[0050] Furthermore, a ball baffle 191 is installed at the upper end of the first slanted wall 111 and the upper end of the second slanted wall 112 to block the iron ball 30. A gap is set between the ball baffle 191 and the side wall of the block 20. The main function of the ball baffle 191 is to prevent the iron ball 30 from overflowing.

[0051] When the saw blade 41 rotates, the tangential direction of the saw blade 41 is disposed toward the side of the second right-angled side wall 22 .

[0052] In some embodiments, if the furniture board 40 is a wooden board, and the wooden board is a dry or easy-to-chip wood (such as fir, with a moisture content of less than 11.4%), then there is no need to start the megasonic transducer array 16 and the ultrasonic transducer array 17. The furniture board 40 is placed on the block 20 and then clamped by two plywoods 5 for cutting.

[0053] Test 1: When the saw blade 41 is cutting a wooden board, especially a wet wooden board (such as fir with a moisture content of more than 12%) or a wooden board with poor chip removal ability, the frequency of the megasonic transducer array 16 is 1200 kHz, the power of the megasonic transducer array 16 is 325 W, the frequency of the ultrasonic transducer array 17 is 20 kHz, and the power of the ultrasonic transducer array 17 is 2.1 kW.

[0054] Test 2: When the saw blade 41 performs a cutting operation, the ultrasonic transducer array 17 and the megasonic transducer array 16 are not activated.

[0055] Test 3: When the saw blade 41 performs a cutting operation, only the ultrasonic transducer array 17 is activated, and the megasonic transducer array 16 is not activated. The frequency of the ultrasonic transducer array 17 is 20 kHz, and the power of the ultrasonic transducer array 17 is 2.1 kW.

[0056] Test 4: When the saw blade 41 performs a cutting operation, the ultrasonic transducer array 17 is not activated, and only the megasonic transducer array 16 is activated. The frequency of the megasonic transducer array 16 is 1200 kHz, and the power of the megasonic transducer array 16 is 325 W.

[0057] Test 5: When the saw blade 41 is performing a cutting operation, the ultrasonic transducer array 17 and the megasonic transducer array 16 are started at the same time. The frequency of the megasonic transducer array 16 is 1500kHz, and the power of the megasonic transducer array 16 is 325W; the frequency of the ultrasonic transducer array 17 is 50kHz, and the power of the ultrasonic transducer array 17 is 120W.

[0058] Experiment 6: In this experiment, the cross-section of the block 20 is set to be semicircular, and the triangular groove is replaced by a semicircular groove matching the block 20. The rest is the same as in Example 3. When the saw blade 41 performs the cutting operation, the ultrasonic transducer array 17 and the megasonic transducer array 16 are started at the same time. The operating parameters of the ultrasonic transducer array 17 and the megasonic transducer array 16 are the same as those in Experiment 1.

[0059] Test 7: In this test, the ratio of the length of the first right-angled side wall 21 to the length of the second right-angled side wall 22 is 1:1, and the rest is the same as in Example 3. When the saw blade 41 performs the cutting operation, the ultrasonic transducer array 17 and the megasonic transducer array 16 are started at the same time, and the operating parameters of the ultrasonic transducer array 17 and the megasonic transducer array 16 are the same as in Test 1.

[0060] Tests 1 to 7 were cut according to the Burnt Simulation Characterization Test. The results are shown in Table 1:

[0061] Table 1

[0062] Burning rate Test 1 0 Test 2 67.3% Test 3 55.6% Test 4 52.5% Test 5 49.1% Test 6 41.3% Test 7 39.5%

[0063] Burning simulation characterization test

[0064] Soak the fir board in water and then dry it to control its moisture content to 16%, obtaining a wet board (5 cm thick). Use a cutting station to cut the wet board. The parameters of the saw blade 41 of the cutting station are: outer diameter of 255 mm, saw kerf width of 2.8 mm, number of teeth of 100; the speed during the cutting operation is 2800 r / min; after cutting, measure the area of ​​the cut section, which is S i1 Observe whether there is any burning phenomenon on the cutting section. If there is any burning phenomenon, wipe it with an eraser first. After wiping 2 to 3 times, measure the burning mask, which is S j1 Burning rate = S j1 / S i1 .

[0065] For reference, if a fir board with a moisture content of 11% is used, according to the above test, the burn rate = 0.

[0066] In the present invention, since the ultrasonic vibration and megasonic vibration are first transmitted, "superimposed and compounded" by the iron ball 30 and the non-Newtonian fluid lubricating medium 31, the first right-angled side wall 21 and the second right-angled side wall 22 of the block 20 mainly function to amplify the transmission effect; ultimately, when cutting the wooden board, the chip removal ability of the saw blade 41 during cutting is significantly improved, thereby significantly reducing the phenomenon of burning the wooden board and blackening the cut surface.

[0067] It can be seen that in the present invention, the cutting operation is performed in conjunction with the cutting station and the ultrasonic megasonic support platform 7, which can significantly improve the chip removal ability of the saw blade 41; when the wooden board is moistened, it can also significantly reduce the burning and blackening of the cut surface of the wet wooden board during cutting.

[0068] When the furniture board 40 is a metal board (especially a stainless steel board), the drill bit performs a drilling operation on the metal board. The frequency of the megasonic transducer array 16 is 870kHz, the power of the megasonic transducer array 16 is 110W, and the frequency of the ultrasonic transducer array 17 is 56kHz, the power of the ultrasonic transducer array 17 is 0.3kW.

[0069] Drilling efficiency characterization test

[0070] A 0.6cm martensitic stainless steel plate was used as a sample. The drill bit used in the drilling and grinding station was a high-speed steel twist drill (20mm diameter), and the drilling speed was 600r / min. The drilling test was carried out, requiring the test to be completed in one go and the hole wall to be free of scratches and defects after drilling. Multiple measurements were taken to calculate the required maximum feed rate.

[0071] Test 8: When the furniture panel 40 is a martensitic stainless steel plate, the drill bit performs drilling operations on the martensitic stainless steel plate according to the "Drilling Efficiency Characterization Test". The frequency of the megasonic transducer array 16 is 870 kHz, and the power of the megasonic transducer array 16 is 110 W. The frequency of the ultrasonic transducer array 17 is 56 kHz, and the power of the ultrasonic transducer array 17 is 0.3 kW.

[0072] Test 9: When the furniture board 40 is a martensitic stainless steel plate, the drill bit performs a drilling operation on the martensitic stainless steel plate according to the "Drilling Efficiency Characterization Test", and neither the megasonic transducer array 16 nor the ultrasonic transducer array 17 is activated.

[0073] Test 10: When the furniture panel 40 is a martensitic stainless steel plate, the drill bit performs a drilling operation on the martensitic stainless steel plate according to the "Drilling Efficiency Characterization Test". The megasonic transducer array 16 is not activated, the frequency of the ultrasonic transducer array 17 is 56 kHz, and the power of the ultrasonic transducer array 17 is 0.3 kW.

[0074] Test 11: When the furniture panel 40 is a martensitic stainless steel plate, the drill bit performs a drilling operation on the martensitic stainless steel plate according to the "Drilling Efficiency Characterization Test". The frequency of the megasonic transducer array 16 is 870 kHz, the power of the megasonic transducer array 16 is 110 W, and the ultrasonic transducer array 17 is not started.

[0075] Experiment 12: The non-Newtonian fluid lubricating medium 31 in Example 3 was replaced with lithium-based grease, and the rest remained unchanged. The drilling operation was carried out according to the parameters in Experiment 8.

[0076] Table 2

[0077] Maximum feed rate (mm / r) Test 8 0.71 Test 9 0.41 Test 10 0.65 Test 11 0.52 Test 12 0.44

[0078] As can be seen from the above, in the present invention, when drilling and removing chips, the role played by the "superposition and compounding" of ultrasonic vibration and megasonic vibration is mainly ultrasonic vibration, and a non-Newtonian fluid lubricating medium 31 must be used as a coupling agent; conventional lithium-based grease can only be used as a lubricant and cannot be used as a coupling agent.

[0079] The drilling operation is performed by using the drilling and grinding station in conjunction with the ultrasonic megasonic bearing platform 7, which can significantly increase the drilling rate of the drill bit; in particular, it can solve the defect of poor drilling efficiency when drilling stainless steel plates.

[0080] When the furniture board 40 is a wooden board, the mesh size of the sandpaper connected to the bottom of the grinding wheel is 150~360 mesh; the rotation speed of the grinding wheel is ω, unit is r / min; the frequency of the megasonic transducer array 16 is f1, unit is kHz, and the power of the megasonic transducer array 16 is 850W; the frequency of the ultrasonic transducer array 17 is f2, unit is kHz, and the power of the ultrasonic transducer array 17 is 120W; ω=λf1+βf2, 1.05≤λ≤1.21, 20≤β≤40, 28.5≤f1 / f2≤37.1.

[0081] Specifically, when sanding a fir board, the grit of the sandpaper is 150, the frequency of the megasonic transducer array 16 is f1 = 1500 kHz, and the power of the megasonic transducer array 16 is 850 W; the frequency of the ultrasonic transducer array 17 is f2 = 50 kHz, and the power of the ultrasonic transducer array 17 is 120 W. ω = 3035 r / min.

[0082] λ and β depend primarily on the wood type. For example, for fir, λ = 1.2 and β = 23.5. For willow, λ = 1.07 and β = 38.2. For poplar, λ = 1.05 and β = 20. For oak, λ = 1.21 and β = 40.

[0083] Polishing effect characterization test

[0084] A fir board was sanded using 150-grit sandpaper mounted on an 18-cm diameter grinding wheel for 12 minutes at a speed of 3035 rpm. The initial mass of the sandpaper was m1. After sanding, dust was blown off with compressed air. The sandpaper was then placed in an ultrasonic cleaning tank and ultrasonically treated with alcohol (75% by volume) at a frequency of 20 kHz for 1 minute. The sandpaper was then removed and dried with a hair dryer for 5 minutes. The mass of the cleaned sandpaper was then weighed as m2. The sandpaper wear rate was calculated as (m1 - m2) / m1.

[0085] Test 13: During the grinding operation, the frequency of the megasonic transducer array 16 was f1 = 1500 kHz, and the power of the megasonic transducer array 16 was 850 W; the frequency of the ultrasonic transducer array 17 was f2 = 50 kHz, and the power of the ultrasonic transducer array 17 was 120 W. According to the "Grinding Effect Characterization Test", the sandpaper wear rate was 39.3‰.

[0086] Test 14: During the grinding operation, neither the megasonic transducer array 16 nor the ultrasonic transducer array 17 was activated. The test was conducted in accordance with the "Grinding Effect Characterization Test". The sandpaper wear rate was 181.7‰.

[0087] Test 15: During the grinding operation, the megasonic transducer array 16 was not activated, the frequency of the ultrasonic transducer array 17 was f2 = 50 kHz, and the power of the ultrasonic transducer array 17 was 120 W. According to the "Grinding Effect Characterization Test", the sandpaper wear rate was 155.9‰.

[0088] Test 16: During the grinding operation, the frequency of the megasonic transducer array 16 was f1 = 1500 kHz, and the power of the megasonic transducer array 16 was 850 W; the ultrasonic transducer array 17 was not activated. According to the "Grinding Effect Characterization Test", the sandpaper wear rate was 86.5‰.

[0089] Test 17: During the grinding operation, the frequency of the megasonic transducer array 16 is f1=1500kHz, and the power of the megasonic transducer array 16 is 850W; the power of the ultrasonic transducer array 17 is 120W. If the frequencies of the ultrasonic transducer array 17 are 20kHz, 35kHz, 50kHz, and 75kHz, respectively, the corresponding sandpaper wear rates are 70.9‰, 75.7‰, 39.3‰, and 92.2‰, respectively. Example 4

[0090] In Example 3, the interior of the trough shell 10 is provided with a first holding chamber 13 for accommodating a megasonic transducer array 16, a second holding chamber 15 for accommodating an ultrasonic transducer array 17, and an electromagnet plate 12 for separating the first holding chamber 13 and the second holding chamber 15. The bottom of the triangular trough and the bottom of the trough shell 10 are welded and sealed by the electromagnet plate 12. The first holding chamber 13 and the second holding chamber 15 are both filled with water. The first inclined wall 111, the second inclined wall 112 and the block 20 are all made of iron material.

[0091] The water inside the first accommodation chamber 13 and the second accommodation chamber 15 is mainly used to prevent the megasonic transducer array 16 and the ultrasonic transducer array 17 from overheating, and circulating cooling water can be used.

[0092] When the block 20 needs to be fixed, mainly for finishing the furniture board 40, the electromagnet plate 12 is energized to generate magnetic force, and then the first inclined wall 111, the second inclined wall 112, the iron ball 30, and the block 20 are magnetized and fixed, so that the block 20 can no longer move or vibrate. Example 5

[0093] In Example 3, the method for preparing the non-Newtonian fluid lubricating medium comprises the following steps:

[0094] Step S1, dissolving 0.75 kg of cobalt nitrate in 39 kg of water to obtain a cobalt nitrate solution, pouring 1.5 kg of attapulgite into the cobalt nitrate solution and stirring and mixing at a temperature of 60±3° C. to obtain a first mixture; adding 3.6 kg of a 12% by mass sodium borohydride solution to the first mixture, stirring and reacting for 1 hour, filtering, washing until neutral, and drying to obtain pretreated attapulgite;

[0095] Step S2: 1 kg of pretreated attapulgite and 1.5 kg of ionic liquid were stirred at 125° C. for 1 hour, dried, and ball-milled to obtain modified attapulgite; the ionic liquid was prepared by mixing 1.1 kg of 1-butyl-2,3-dimethylimidazolium thiocyanate (673855-36-2) with 8.9 kg of water;

[0096] Step S3: 10 kg of lithium-based grease, 2 kg of glycerol, 0.8 kg of modified attapulgite, and 0.03 kg of triethylaluminum were mixed, and the mixture was stirred and reacted for 3 hours under microwave radiation with a power of 360 W to obtain the non-Newtonian fluid lubricating medium.

[0097] The non-Newtonian fluid lubricating medium is tested using a rheometer. When the shear rate is 500s -1 , 1000s -1 , 1500s -1 , 2000s -1 When the viscosity is 33.55mm 2 / s、17.19mm 2 / s、9.52mm 2 / s、7.73mm 2 / s, showing obvious shear thinning properties.

[0098] As a control, if in step S3, the modified attapulgite is replaced by attapulgite, and the rest is the same as in Example 5, the final lubricating medium 1 is obtained, which has a shear rate of 500s -1 ~2000s -1 In the range of viscosity, the viscosity is 37.72mm 2 / s~30.25mm 2 / s range, and showed no shear thinning properties.

[0099] As a control, if in step S3, the modified attapulgite is replaced by the pretreated attapulgite, and the rest is the same as in Example 5, the final lubricating medium 2 is obtained, which has a shear rate of 500s -1 ~2000s -1 In the range of viscosity, the viscosity is 36.58mm 2 / s~35.17mm 2 / s range, and showed no shear thinning properties.

[0100] In the present invention, the non-Newtonian fluid lubricating medium has obvious shear-thinning properties, which is more conducive to the effects of ultrasound and megasonics on the block 20.

[0101] In the above embodiment, the first driving mechanism 6 and the second driving mechanism are one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cutting, drilling and grinding combination machine tool for processing furniture panels, used for cutting, drilling or grinding furniture panels (40), comprising a bed (1), an X-axis walking mechanism, a Y-axis walking mechanism (2), a Z-axis walking mechanism (3), and a processing head (4), a clamping assembly is provided along the Y-axis direction of the bed (1), the clamping assembly comprising two clamping plates (5) and a first driving mechanism (6) for driving the clamping plates (5) to perform translational motion, characterized in that: The processing head (4) includes a cutting station, a drilling and grinding station, and a dual-output shaft motor (42); the cutting station includes a saw blade (41); the drilling and grinding station includes a main shaft (43); the lower end of the main shaft (43) is detachably connected to a drill bit or a grinding disc; the saw blade (41) and the main shaft (43) are both driven to rotate by the dual-output shaft motor (42); the top of the bed (1) is provided with at least one set of ultrasonic and megasonic bearing platforms (7) for generating ultrasonic vibration and megasonic vibration and adapting the ultrasonic and megasonic vibrations; The ultrasonic megasonic bearing platform (7) includes a trough shell (10) and a platform block (20) with a right-angled triangle cross section, wherein the bottom of the trough shell (10) is fixedly connected to the bed (1); the platform block (20) is provided with a first right-angled side wall (21), a second right-angled side wall (22) and a horizontally arranged oblique side wall (24), and a circular limiting shaft (23) is provided on the front and rear sides of the platform block (20); the top of the trough shell (10) is also provided with a triangular groove with a right-angled triangle cross section and matching the platform block (20), and the triangular groove is provided with a first oblique wall (111) parallel to the first right-angled side wall (21), a second oblique wall (112) parallel to the second right-angled side wall (22), and the first An iron ball accommodating cavity is provided between the right-angled side wall (21) and the first inclined surface wall (111), and between the second right-angled side wall (22) and the second inclined surface wall (112). The iron ball accommodating cavity is filled with a plurality of iron balls (30). The iron ball accommodating cavity is also filled with a non-Newtonian fluid lubricating medium (31). A ball spacer (18) is provided at the junction between the first inclined surface wall (111) and the second inclined surface wall (112). The groove wall of the triangular groove is also provided with a limiting circular hole (14) adapted to the limiting axis (23). A megasonic transducer array (16) is provided on the outer side of the first inclined surface wall (111), and an ultrasonic transducer array (17) is provided on the outer side of the second inclined surface wall (112).

2. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The interior of the tank shell (10) is provided with a first accommodating chamber (13) for accommodating a megasonic transducer array (16), a second accommodating chamber (15) for accommodating an ultrasonic transducer array (17), and an electromagnet plate (12) for separating the first accommodating chamber (13) from the second accommodating chamber (15). The bottom of the triangular tank and the bottom of the tank shell (10) are welded and sealed by the electromagnet plate (12). The interiors of the first accommodating chamber (13) and the second accommodating chamber (15) are both filled with water. The first inclined wall (111), the second inclined wall (112) and the platform (20) are all made of iron material.

3. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The diameter of the limiting circular hole (14) is greater than the diameter of the limiting shaft (23), and the difference between the diameter of the limiting circular hole (14) and the diameter of the limiting shaft (23) is x, 0.3mm≤x≤1mm.

4. A cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The method for preparing the non-Newtonian fluid lubricating medium comprises the following steps: Step S1, dissolving 7.5 parts by mass of cobalt nitrate in 300-500 parts by mass of water to obtain a cobalt nitrate solution, pouring 15 parts by mass of attapulgite into the cobalt nitrate solution and stirring and mixing at a temperature of 60±3° C. to obtain a first mixture; adding 36 parts by mass of a 12% sodium borohydride solution to the first mixture, stirring and reacting for 1-2 hours, filtering, washing until neutral, and drying to obtain pretreated attapulgite; Step S2, stirring 10 parts by mass of pretreated attapulgite and 15 to 16 parts by mass of ionic liquid at a temperature of 120 to 125° C. for 1 to 2 hours, drying, and ball milling to obtain modified attapulgite; the ionic liquid is prepared by mixing 11 parts by mass of 1-butyl-2,3-dimethylimidazolium thiocyanate and 89 parts by mass of water; Step S3, mixing 100 parts by mass of lithium-based grease, 5 to 50 parts by mass of glycerol, 7 to 9 parts by mass of modified attapulgite, and 0.3 parts by mass of triethylaluminum, stirring and reacting the mixture under microwave radiation with a power of 350 to 390 W for 2 to 3 hours to obtain the non-Newtonian fluid lubricating medium.

5. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The ratio of the length of the first right-angled side wall (21) to the length of the second right-angled side wall (22) is 2.3:1, and the diameter of the iron ball (30) is 3.1-3.3 mm.

6. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: When the furniture plate (40) is a metal plate, the drill bit performs a drilling operation on the metal plate, the frequency of the megasonic transducer array (16) is 870 kHz, the power of the megasonic transducer array (16) is 110 W, the frequency of the ultrasonic transducer array (17) is 56 kHz, and the power of the ultrasonic transducer array (17) is 0.3 kW; When the furniture board (40) is a wooden board, when the saw blade (41) performs a cutting operation on the wooden board, the frequency of the megasonic transducer array (16) is 1200 kHz, the power of the megasonic transducer array (16) is 325 W, the frequency of the ultrasonic transducer array (17) is 20 kHz, and the power of the ultrasonic transducer array (17) is 2.1 kW; When the furniture board (40) is a wooden board, the mesh size of the sandpaper connected to the bottom of the grinding disc is 150 to 360 meshes; the rotation speed of the grinding disc is ω, unit is r / min; the frequency of the megasonic transducer array (16) is f1, unit is kHz, and the power of the megasonic transducer array (16) is 850W; the frequency of the ultrasonic transducer array (17) is f2, unit is kHz, and the power of the ultrasonic transducer array (17) is 120W; ω=λf1+βf2, 1.05≤λ≤1.21, 20≤β≤40, 28.5≤f1 / f2≤37.

1.

7. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: A ball blocking plate (191) for blocking the iron ball (30) is installed on the upper end of the first inclined wall (111) and the upper end of the second inclined wall (112), and a gap is provided between the ball blocking plate (191) and the side wall of the table block (20).

8. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The saw blade (41) is arranged along the X-axis or Y-axis direction of the bed (1), and the main shaft (43) rotates along the Z-axis direction of the bed (1); the connection between the first output shaft of the dual-output shaft motor (42) and the saw blade (41) is one of the following: a transmission belt and a pulley, or a transmission chain and a sprocket; the second output shaft of the dual-output shaft motor (42) is connected to the main shaft (43) through two sets of bevel gears, and the processing head (4) also includes a second driving mechanism for lifting and lowering the main shaft (43).

9. The cutting, drilling and grinding combined machine tool for furniture board processing according to claim 1, characterized in that: The top of the bed (1) is also provided with a plurality of chip collecting grooves, and the chip collecting grooves are all connected to the negative pressure dust suction pipe.

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