Three-head knife sharpening device and knife sharpening machine

Abstract

The invention discloses a three-grinding-head sharpening device, which comprises a main sharpening device and a supporting frame, wherein the main sharpening device is fixed on the supporting frame, and is characterized in that an upper oiling knife device is arranged on the left side of the supporting frame, and a lower oiling knife device is arranged on the right side, the main sharpening device is used to grind the main cutting surface of a straight blade, the upper oiling knife device grinds the upper cutting surface of the straight blade, and the lower oiling knife device grinds the lower cutting surface of the straight blade, and the straight blade is clamped at one time, so that the straight blade has high straightness after grinding, and the smoothness of the cutting edge reaches mirror surface, so that a high-precision tool is provided for a rotary cutter, the smoothness and thickness error of a single board rotary cut are small, the processing speed is fast, and the grinding efficiency is high, so that advanced and fast processing equipment is provided for the rotary cutting of the single board at the front stage of plywood.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a three-grinding-head knife sharpening device and a knife sharpening machine. Background Art

[0002] A straight knife is a sheet-shaped, long-strip tool that is widely used in papermaking, printing, textile, fiber, food, forestry, plastic, wood and other industries. In the production process of straight knives, the blade plane and the bevel of the blade must be ground to ensure the sharpness and straightness requirements of the blade and the consistency of size. Usually, the grinding of straight knives is carried out by a surface grinder or a special straight knife grinder similar to a surface grinder. During the grinding process, a single clamping can only grind one cutting surface of the tool. After grinding, it must be manually oiled. After manual oiling, the straightness of the tool and the smoothness of the cutting surface are not good, and the requirements of high-precision cutting cannot be met. The thickness and smoothness of the veneer cut by this tool are not ideal, and the need for manual oiling after the knife grinder sharpens the knife will lead to low production efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a three-grinding head sharpening device and a sharpening machine which have a novel structure, are quick to sharpen, have high working efficiency, save labor costs, and improve the straightness and smoothness of the cutting edge of the tool.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A three-grinding head sharpening device comprises a main sharpening device and a supporting frame, wherein the main sharpening device is fixed on the supporting frame, and is characterized in that a lower oil knife device is provided on the left side of the supporting frame, and an upper oil knife device is provided on the right side. The main sharpening device is used to grind the main cutting surface of a straight blade, the upper oil knife device grinds the surface cutting surface of the straight blade, and the lower oil knife device grinds the back cutting surface of the straight blade. The grinding of the three cutting surfaces of the blade is completed in a single clamping, so that the straight blade has high straightness of the cutting edge after grinding, and the cutting edge has mirror finish, so that a tool with qualified precision is provided for a rotary cutter, and the single board cut out has small finish and thickness errors, so that advanced and fast processing equipment is provided for the production of artificial boards.

[0006] The main grinding device of the present invention comprises a stand, a ram, a lifting device, a main grinding head motor and a main grinding head. The lower end of the stand is slidably connected to the support frame, and the stand is vertically slidably connected to the ram through the driving of the lifting device. The main grinding head motor is fixed on the ram, and the main grinding head is fixed at the lower end of the output shaft of the main grinding head motor. The main grinding head is vertically fed by the lifting device, and the main grinding head motor drives the main grinding head to rotate, thereby realizing the grinding of the main cutting surface of the tool.

[0007] The lower oil knife device comprises a left support, a left cross slide seat, a left lateral movement device, a left lifting device, a lower oil knife grinding head motor, a lower oil knife grinding wheel, and a left ram. The left support is fixed on the supporting frame. The left side of the left support is slidably connected with the left lateral movement device. The right side of the left cross slide seat is driven by the left lateral movement device provided on the left support and is slidably connected with the lateral slideway on the left support. The left side is driven by the left lifting device provided on the left ram and is vertically slidably connected with the right side of the left ram. The left side of the left ram is fixedly connected with the lower oil knife grinding head motor, and the lower end of the output shaft of the lower oil knife grinding head motor is fixedly connected with the lower oil knife grinding wheel; so as to facilitate adjusting the lateral feed position of the lower oil knife grinding wheel to the lower cutting surface of the tool through the left lateral movement device, and then adjusting the grinding feed amount of the lower oil knife grinding wheel through the left lifting device;

[0008] The oiling knife device comprises a right support, a right cross slide seat, a right lateral moving device, a right lifting device, an oiling knife grinding head motor, an oiling knife grinding wheel, and a right ram. The right support is fixed on the supporting frame, and the right side of the right support is fixedly connected to the right lateral moving device. The left side of the right cross slide seat is driven by the right lateral moving device provided on the right support and is slidingly connected to the lateral slideway on the right support, and the right side is driven by the right lifting device provided on the right ram and is vertically slidingly connected to the right side of the right ram. The right side of the right ram is fixedly connected to the oiling knife grinding head motor, and the lower end of the output shaft of the oiling knife grinding head motor is fixedly connected to the oiling knife grinding wheel; this is to facilitate the adjustment of the lateral feed position of the oiling knife grinding wheel to the lower cutting surface of the tool through the right lateral moving device, and then adjust the grinding feed amount of the oiling knife grinding wheel through the right lifting device.

[0009] The present invention can provide a grinding head rotation angle adjustment device between the lifting device and the main grinding head motor, between the left lifting device and the lower oil knife grinding head motor, and between the right lifting device and the upper oil knife grinding head motor. The grinding head rotation angle adjustment device comprises a swivel seat, a connecting shaft, a support block, a support plate, a pointer, an angle identification plate, a main adjustment screw and an adjustment handle. One end of the swivel seat is rotatably connected to the slide via the connecting shaft, and the other end is fixedly connected to the main grinding head motor. The left and right sides of the swivel seat are arc surfaces respectively, and the center of the arc surface is concentric with the axis of the connecting shaft. An angle identification plate is installed on the arc surface on one side of the swivel seat. A fixed device is provided on the upper end of the swivel seat. There is a support plate, a pointer is provided on one side of the sliding block, a support block is fixed on the sliding block, the pointer corresponds to the angle plate, and after the main adjusting screw thread passes through the support block, one end thereof is threadedly connected to the support shaft hinged on the support plate, and the rear part is fixedly connected to the adjusting handle, so as to facilitate the main adjusting screw to rotate by rotating the adjusting handle, so that the support plate moves along the axial direction of the main adjusting screw under the rotation of the main adjusting screw, thereby driving the swivel seat to rotate, and the swivel seat drives the main grinding head motor and the main grinding head to rotate a certain angle, and the angle is observed by observing the correspondence between the angle plate and the pointer to observe the precise angle of rotation of the motor swivel seat, thereby accurately adjusting the rotation angle of the main grinding head.

[0010] The present invention can provide at least two arc guide grooves in a circular array on the end surface of the swivel seat with the axis of the connecting shaft as the center of the circle, and the arc of the arc guide groove is on a circumference of the same diameter. The guide bolt passes through the arc guide groove and is fixedly connected to the slide and / or the left slide and / or the right slide, so that the swivel seat rotates through the connecting shaft during the rotation process, and moves along the arc track of the arc guide groove through the guide bolt, thereby accurately adjusting the rotation angle of the grinding head.

[0011] The lifting device of the present invention is composed of a main grinding head lifting drive device, a gear box, a worm wheel, a worm, a ball screw pair, and a nut seat. The main grinding head lifting drive device and the gear box are respectively fixed on the supporting frame, the main grinding head lifting drive device is connected to the worm gear through the gear box, the worm is fixedly connected to the stand through a bearing, the worm is meshed with the worm wheel, the worm wheel is fixed on the ball screw pair, the nut on the ball screw pair is connected with a nut seat, the upper and lower ends of the ball screw pair are respectively fixed to the upper and lower ends of the stand through bearings, the nut seat is fixed on the ram, the left and right sides of the ram are respectively slidably connected with the slideways provided on the stand, the main grinding head lifting drive device drives the worm wheel transmission through the gear box, drives the ball screw pair to rotate, drives the ram to move up and down, and then drives the main grinding head to move up and down to achieve accurate grinding feed amount;

[0012] The left lifting device is composed of a lower oil knife lifting power source, a left ball screw pair, and a left fixed nut. The left ball screw pair is installed at the center of the left support, and left slideways are respectively provided on both sides. The left ball screw pair is driven by the lower oil knife lifting power source. The lower oil knife lifting power source can be driven by a motor. When the motor is driven, the motor is controlled by a control device; it can also be manually driven; a left fixed nut is threadedly connected to the left ball screw pair, the center of the left ram is fixedly connected to the left fixed nut, and the two sides of the left ram are respectively slidably connected to the left slideway on the left support, and the left ball screw pair is driven to rotate by the lower oil knife lifting power source, thereby driving the left fixed nut to move up and down, and the left fixed nut drives the left ram to move up and down along the left slideway, thereby making the lower oil knife grinding head on the left ram move up and down accurately;

[0013] Similarly, the right lifting device is composed of an oiling knife lifting power source, a right ball screw pair, and a right fixed nut. The right ball screw pair is installed at the center of the right support, and right slideways are respectively provided on both sides. The right ball screw pair is driven by the oiling knife lifting power source, and a right fixed nut is threaded on the right ball screw pair. The center of the right slide is fixedly connected to the right fixed nut, and the two sides of the right slide are respectively slidably connected to the right slideway on the right support. The right ball screw pair is driven to rotate by the oiling knife lifting power source, driving the right fixed nut to move up and down, and the right fixed nut drives the right slideway to move up and down along the right slideway, thereby making the oiling knife grinding head on the right slideway move accurately up and down.

[0014] The main grinding head lifting drive device of the present invention comprises a manual rough feeding device and an electric fine feeding device, wherein the manual rough feeding device is composed of a clutch gear handwheel, a handwheel shaft, a bearing, and a support plate, wherein the handwheel shaft is supported and fixed by a bearing and a support plate fixed to a support frame, wherein one end of the handwheel shaft is connected to a large synchronous pulley in a gear box, and the other end is fixedly connected to a clutch gear handwheel, so as to facilitate the handwheel shaft to rotate through the clutch gear handwheel, and the handwheel shaft drives the worm gear through the large synchronous pulley and the synchronous belt in the gear box, drives the ball screw pair to rotate, drives the ram to move up and down along the slideway on the stand through the nut seat, and then drives the main grinding head to move up and down to realize that the grinding wheel of the main grinding head quickly approaches the surface to be ground of the tool;

[0015] The electric fine feed device includes a main grinding head motor drive, and the main grinding head motor is controlled by a control device so that the main grinding head motor drives the small synchronous pulley in the gear box and the synchronous belt to drive the worm gear transmission through the program control of the control device, drives the ball screw pair to rotate, drives the slide block to move up and down along the slideway on the stand through the nut seat, and then drives the main grinding head to move up and down to realize the fine feed grinding of the main grinding head.

[0016] When the lower oil knife lifting power source and / or the upper oil knife lifting power source of the present invention are manually controlled, they include a worm gear box, a turntable, a positioning pin assembly, a rotating handle, a scale handle, and a fine-tuning pointer. The worm gear box is provided with a primary worm wheel (not shown in the figure), a primary worm, a secondary worm wheel, a secondary worm, a primary composite shaft sleeve, and a secondary composite shaft sleeve. The outer wall of the worm gear box is provided with a pointer. The screw of the left ball screw pair and / or the right ball screw pair extends into the worm gear box and is fixedly connected to the primary worm wheel. One end of the primary worm is meshed with the primary worm wheel, and the other end is fixedly connected to the turntable via a key. The movable sleeve on the primary worm is provided with a primary composite shaft sleeve, and the fixed sleeve on the primary composite shaft sleeve is provided with a secondary worm wheel. A certain Position hole, the secondary worm wheel is meshed with the secondary worm, the secondary worm is fixedly connected to the end cover fixed to the worm gear box through the secondary composite sleeve, one end of the secondary worm extends out of the end cover and is fixedly connected to the scale handle, the scale handle is engraved with scales on the circumference, the fine-tuning pointer corresponds to the scale, the outer circumference of the turntable is provided with scales, the outer end of the turntable is fixed with a rotating handle, the turntable is provided with a positioning pin through-hole and a positioning pin positioning hole, the pointer corresponds to the scale, so as to accurately control the feed amount of the lower oil knife or the upper oil knife through the pointer and the scale, the positioning through-hole is smaller than the positioning pin positioning hole and is on the same axis, the horizontal diameter of the positioning pin positioning hole is smaller than the vertical diameter, and a positioning strip card groove is provided on the outer end surface of the horizontal diameter (not shown in the figure),

[0017] The positioning pin assembly is composed of a pin shaft, a positioning strip, a reset spring positioning pin handle and a retaining ring. The retaining ring is fixed in the positioning pin positioning hole, and the inner hole of the retaining ring is smaller than the positioning pin through-hole. The pin shaft is vertically fixedly connected with the positioning strip. After the pin shaft passes through the positioning pin positioning hole, the retaining ring and the reset spring provided in the positioning pin through-hole in sequence, the inner end is plugged into the positioning hole of the secondary worm gear, and the outer end is fixedly connected with the positioning pin handle. One end of the reset spring conflicts with the shaft shoulder on the pin shaft, and the other end conflicts with the retaining ring fixed in the positioning pin positioning hole. The positioning strip conflicts with the retaining ring through the tension of the reset spring.

[0018] When the pin shaft is separated from the positioning hole of the second-stage turbine, the positioning bar is rotated 90 degrees and plugged into the positioning bar slot at the end of the positioning pin positioning hole;

[0019] In order to facilitate the rough feeding of the lower oil knife grinding head or the upper oil knife grinding head, the positioning pin handle is held to pull the pin shaft outward and rotate it 90 degrees. The pin shaft is stuck in the positioning bar slot through the positioning bar. At this time, the pin shaft is separated from the secondary worm gear. Then the positioning pin handle is rotated, the turntable drives the primary worm to rotate, the primary worm drives the primary worm gear to rotate, the primary worm gear drives the left ball screw pair and / or the right ball screw pair to rotate, the left ball screw pair drives the left fixing nut and / or the right ball screw pair drives the right fixing nut to move, the left fixing nut drives the left slide to move along the left slide, and / or the right fixing nut drives the right slide to move along the right slide, thereby realizing that the lower oil knife grinding head and / or the upper oil knife grinding head quickly approaches the tool to be ground surface;

[0020] When fine feeding the lower oil knife grinding head or the upper oil knife grinding head, rotate the positioning pin handle 90 degrees, the pin shaft is reset under the tension of the reset spring, the inner end of the pin shaft is inserted into the positioning hole of the secondary worm gear, the pin shaft connects the secondary worm gear and the turntable together, rotate the scale handle one circle, the 0 degree mark on the scale handle corresponds to the reference mark, which means that the scale handle rotates one circle, the secondary worm drives the secondary turbine, the secondary turbine drives the turntable, the turntable drives the first-level worm, the first-level worm drives the first-level turbine, and the first-level turbine drives the left ball screw pair and / or the right ball screw pair to move a distance of 0.01mm, thereby realizing fine feeding cutting of the lower oil knife grinding head and / or the upper oil knife grinding head.

[0021] The present invention can also provide a turntable anti-rotation device at the outer end of the turntable, which includes a locking handle and a locking screw. The outer end of the turntable is provided with a threaded through hole along the axial direction, and the locking screw is threadedly connected to the threaded through hole. The outer end of the locking screw is fixedly connected to the locking handle. When anti-rotation is required, the inner end contacts the worm gear box to facilitate restraining the rotation of the turntable through the anti-rotation device. When the turntable rotates, the locking handle is rotated in the opposite direction, and the inner end of the locking screw is separated from the worm gear box, thereby further achieving the effect of high grinding precision.

[0022] The left transverse moving device of the present invention is composed of a left transverse guide rail, a left screw rod, a left guide nut, a left bearing support and a left hand wheel. The left cross slide seat is movably connected to the left horizontal slideway of the left support via the left transverse guide rail. The left cross slide seat is threadedly connected to the left screw rod via the left guide nut. The left screw rod is horizontally arranged between the horizontal slideways of the left support. The left screw rod is fixedly connected via the left bearing support fixed at the front and rear ends of the left support. One end of the left screw rod is fixedly connected to the left hand wheel, so as to facilitate the rotation of the left screw rod through the left hand wheel. The left guide nut on the left screw rod drives the left horizontal slideway on the left support to move transversely, thereby driving the lower oil knife device to move transversely to adjust the transverse position of the lower oil knife device.

[0023] The right lateral movement device is composed of a right lateral guide rail, a right screw rod, a right guide nut, a right bearing support and a right-hand wheel. The right cross slide seat is movably connected to the right horizontal slide track of the right support via the right lateral guide rail. The right cross slide seat is threadedly connected to the right screw rod via the right guide nut. The right screw rod is horizontally arranged between the horizontal slide tracks of the right support. The right screw rod is fixedly connected via the right bearing support fixed at the front and rear ends of the right support. One end of the right screw rod is fixedly connected to the right-hand wheel to facilitate the rotation of the right screw rod through the right-hand wheel. The right guide nut on the right screw rod drives the right horizontal slide track on the right support to move horizontally, thereby driving the oiling knife device to move horizontally to adjust the lateral position of the oiling knife device.

[0024] The main grinding head described in the present invention is fixedly connected to the main grinding head motor via a connecting device, and the connecting device is composed of a connecting body, a grinding wheel shaft, an upper bearing, a lower bearing, a spacer, and a locking nut. The lower end of the grinding wheel shaft is fixedly connected to the main grinding head, and the upper end is fixedly plugged with the output shaft of the main grinding head motor through a motor jack provided at the axis center. The outer periphery of the grinding wheel shaft is fixedly connected to the connecting body via the upper bearing and the outer ring of the lower bearing respectively, and the upper end of the connecting body is fixedly connected to the main grinding head motor housing. The upper end of the inner ring of the upper bearing is fixedly in conflict with the locking nut threadedly fixed on the grinding wheel shaft, and the lower end of the inner ring is fixedly in conflict with the spacer. The upper end of the inner ring of the lower bearing is fixedly in conflict with the spacer, and the lower end is fixedly in conflict with the shoulder of the grinding wheel shaft, so as to support the grinding wheel shaft through the connecting device to avoid deformation of the grinding wheel shaft during the grinding process, resulting in low grinding accuracy.

[0025] Similarly, the upper oil knife grinding wheel is fixedly connected to the upper oil knife grinding head motor via the upper oil knife connecting device, and the lower oil knife grinding wheel is fixedly connected to the lower oil knife grinding head motor via the lower oil knife connecting device. The structures of the upper oil knife connecting device and the lower oil knife connecting device are the same as the connecting devices, which will not be repeated here.

[0026] The present invention can also provide a baffle plate at the lower end of the coupling body, the upper end of the baffle plate is fixed to the shoulder of the grinding wheel shaft, and the corresponding surfaces of the baffle plate and the coupling body adopt a labyrinth seal to prevent metal chips and other debris from entering the bearing and affecting the service life of the bearing.

[0027] A knife sharpener comprises a machine body, a linear drive device, a straight knife electromagnetic chuck, a cooling device, a control device and a stroke slider, wherein a guide rail pair is provided at the upper end of the machine body, a straight knife electromagnetic chuck is provided in the middle of the guide rail pair, and stroke sliders are provided at the left and right ends of the machine body respectively, the stroke sliders are adjustable, and the positions of the stroke sliders can be appropriately adjusted according to the tool grinding length to improve the grinding efficiency, the straight knife electromagnetic chuck, the linear drive device and the cooling device are respectively controlled by a control device, and the characteristic is that the guide rail pair at the upper end of the machine body is slidably connected with a slideway provided at the lower end of the supporting frame of the three-grinding head sharpening device as described above, the three-grinding head sharpening device is driven by the linear drive device to move linearly along the guide rail pair, the three-grinding head sharpening device is controlled by the control device, and the three-grinding head sharpening device is automatically controlled by the control device to linearly move along the guide rail pair, and the grinding of the three cutting surfaces of the tool is completed by a single clamping, which solves the substantial technical problem that the traditional knife sharpener needs to manually clean the burrs and manually oil the knife after grinding, and not only significantly improves the grinding efficiency, but also significantly improves the grinding quality of the straight knife and the peeling quality of the single plate.

[0028] The cooling device of the present invention comprises a main grinding head cooling pipeline, a lower oil knife grinding head cooling pipeline, an upper oil knife grinding head cooling pipeline, a stop valve, a water tank and a water pump. The main grinding head cooling pipeline, the lower oil knife grinding head cooling pipeline and the upper oil knife grinding head cooling pipeline are respectively installed on a supporting frame. The main grinding head cooling pipeline is located on one side or both sides of the main grinding head to cool the main grinding head during the grinding process. The lower oil knife grinding head cooling pipeline is located on one side of the lower oil knife grinding head to cool the lower oil knife grinding head during the grinding process. The upper oil knife grinding head cooling pipeline is located on one side of the upper oil knife grinding head to cool the upper oil knife grinding head during the grinding process to extend the service life of the grinding head. The main grinding head cooling pipeline, the lower oil knife grinding head cooling pipeline and the upper oil knife grinding head cooling pipeline are respectively connected to the main pipeline via a stop valve and a three-way valve. The main pipeline is connected to the water tank via a water pump, and the water pump is controlled by a control device.

[0029] The present invention can be provided with a solid-liquid recovery device on one side of the fuselage, which includes a permanent magnet separator and a debris recovery box, the liquid inlet of the permanent magnet separator is connected to the liquid outlet of the fuselage, the liquid outlet of the separator is connected to the water tank, and the chip outlet of the permanent magnet separator is connected to the debris recovery box. The permanent magnet separator is controlled by a control device to facilitate solid-liquid separation of the liquid containing metal debris discharged from the fuselage through the permanent magnet separator, which not only significantly saves coolant, but also recycles the metal debris, solving the substantial technical problem of low work efficiency caused by manual cleaning of the coolant in the fuselage. The structure of the permanent magnet separator described in the present invention is prior art and will not be repeated here.

[0030] The control device of the present invention can adopt a PLC control device to achieve automatic control of the program.

[0031] The linear drive device described in the present invention can be driven by a ball screw pair, a nut seat and a servo motor, or by a gear, a rack and a servo motor. The present invention preferably uses a gear, a rack and a servo motor to achieve smooth transmission and high grinding accuracy.

[0032] The guide rail pair of the present invention adopts a linear guide rail pair to achieve the effects of good straightness, small guide rail gap and high tool grinding accuracy.

[0033] The present invention has the advantages of novel structure, quick sharpening, high work efficiency, labor cost saving, high straightness of the cutting edge, high smoothness of the cutting edge, and small smoothness of the single plate cut out, i.e., small thickness error, etc. due to the adoption of the above structure.

[0034] The invention is applied to the grinding of blades of peeling machines, rotary cutters, shearing machines and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the three-grinding-head knife sharpening device of the present invention.

[0036] Figure 2 yes Figure 1 Top view of the .

[0037] Figure 3 It is a structural schematic diagram of the main knife sharpening device of the present invention.

[0038] Figure 4 yes Figure 3 Sectional view of AA.

[0039] Figure 5 It is a structural schematic diagram of the main knife sharpening device and the lower oil knife device of the present invention.

[0040] Figure 6 It is a schematic cross-sectional structural diagram of the lower oil knife device of the present invention.

[0041] Figure 7 It is a schematic cross-sectional view of the oiling knife device of the present invention.

[0042] Figure 8 yes Figure 7 Schematic diagram of the right side (the lower oil knife grinding wheel is rotated at a certain angle).

[0043] Fig. 9 yes Figure 8 Cross-section of the BB.

[0044] Fig.10 yes Figure 5 Cross-sectional view of CC.

[0045] Fig.11 It is a structural schematic diagram of a knife sharpener of the present invention.

[0046] Fig.12 yes Fig.11 Schematic diagram of the structure in the D direction.

[0047] Fig.13 yes Fig.12 Schematic diagram of the structure in the E direction.

[0048] Fig.14 It is a schematic diagram of the structure of the cooling device in the present invention.

[0049] Fig.15 It is a structural schematic diagram of the solid-liquid recovery device in the present invention.

[0050] Fig.16 yes Fig.11 A partial enlarged view of the center D direction.

[0051] Fig.17 yes Figure 5 Schematic diagram of the expansion of FF.

[0052] Figure numerals: main grinding device 1 and support frame 2 upper oiling knife device 3 lower oiling knife device 4 stand 5, ram 6, lifting device 7, main grinding head motor 8 and main grinding head 9 left support 10, left cross slide seat 11, left lateral moving device 12, left lifting device 13, lower oiling knife grinding head motor 14, lower oiling knife grinding wheel 15, left ram 16 right support 17, right cross slide seat 18, right lateral moving device 19, right lifting device 20, upper oiling knife grinding head motor 21, upper oiling knife grinding wheel 22, right ram 23 swivel seat 24, Connecting shaft 25, support block 26, support plate 27, pointer 28, angle identification plate 29, main adjusting screw 30 and adjusting handle 31 arc guide groove 32 guide bolt 33 main grinding head lifting drive device 34, gear box 35, worm wheel 36, worm 37, ball screw pair 38, nut seat 39 upper oil knife lifting power source 40, left ball screw pair 41, left fixed nut 42 lower oil knife lifting power source 43, right ball screw pair 44, right fixed nut 45 worm gear box 46, turntable 47, positioning pin assembly 48, engraved handle 50, fine adjustment pointer 51, primary worm 52, secondary worm wheel 53, secondary worm 54, primary composite sleeve 55, secondary composite sleeve 56, end cover 57, rotating handle 58, pin 59, positioning bar 60, return spring 61, positioning pin handle 62 and retaining ring 63, positioning hole 64, locking handle 65 and locking screw 66, body 67, linear drive device 68, straight knife electromagnetic chuck 69, cooling device 70, control device 71, main grinding head cooling pipeline 72, lower oil knife grinding head cooling pipeline 73, upper oil knife grinding head Cooling pipeline 74, stop valve 75, water tank 76 and water pump 77 main pipeline 78 permanent magnet separator 79 and debris recovery box 80, the center of the left support 10 is installed with the left ball screw pair 41 grinding wheel shaft 81, upper bearing 82, lower bearing 83, baffle 84, spacer 85, locking nut 86, connecting body 87, left transverse guide rail 88, left screw 89, left guide nut 90, left bearing support and left hand wheel 91 right transverse guide rail 92, right screw 93, right guide nut 94, right bearing support and right hand wheel 95. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with the accompanying drawings:

[0054] As attached Figure 1 , 2As shown, a three-grinding head sharpening device comprises a main sharpening device 1 and a supporting frame 2, the main sharpening device 1 is fixed on the supporting frame 2, and is characterized in that a lower oil knife device 3 is provided on the left side of the supporting frame 2, and an upper oil knife device 4 is provided on the right side, the main sharpening device 1 is used to grind the main cutting surface of the straight blade, the upper oil knife device grinds the surface cutting surface of the straight blade, and the lower oil knife device grinds the back cutting surface of the straight blade, and the grinding of the three cutting surfaces of the straight blade is completed through a single clamping, so that the straight blade has high straightness after grinding, and the cutting edge finish reaches mirror finish, so that a high-precision tool is provided for the rotary cutter, the single board cut out has small finish and thickness errors, the processing speed is fast, and the grinding efficiency is high, providing advanced and fast processing equipment for the rotary cutting of the front-end single board of plywood.

[0055] As attached Figure 3 , 4 As shown, the main grinding device 1 of the present invention comprises a stand 5, a ram 6, a lifting device 7, a main grinding head motor 8 and a main grinding head 9. The lower end of the stand 5 is fixedly connected to the support frame 2, and the stand 5 is driven by the lifting device 7 to vertically slide with the ram. The main grinding head motor 8 is fixed on the ram 6, and the main grinding head 9 is fixed at the lower end of the output shaft of the main grinding head motor 6. The vertical feeding of the main grinding head is realized by the lifting device 7. At the same time, the main grinding head motor drives the main grinding head to rotate, so as to realize the grinding of the main cutting surface of the straight blade;

[0056] As attached Figure 4 As shown, the lower oil knife device includes a left support 10, a left cross slide seat 11, a left lateral moving device 12, a left lifting device 13, a lower oil knife grinding head motor 14, a lower oil knife grinding wheel 15, and a left slide 16. The left support 10 is fixed on the support frame 2, the left side of the left support 10 is slidably connected with the left lateral moving device 12, and the right side of the left cross slide seat 11 is driven by the left lateral moving device 12 provided on the left support 10 to slide with the lateral slideway on the left support 10. The left side is connected to the right side of the left ram 16 by the left lifting device 13 provided on the left ram 16, and the left side of the left ram 16 is fixedly connected to the lower oil knife grinding head motor 14, and the lower end of the output shaft of the lower oil knife grinding head motor 14 is fixedly connected to the lower oil knife grinding wheel 15; so as to facilitate the adjustment of the lateral feed position of the lower oil knife grinding wheel 15 to the lower cutting surface of the tool through the left lateral moving device 12, and then adjust the grinding feed amount of the lower oil knife grinding wheel 15 through the left lifting device 13;

[0057] As attached Figure 7As shown, the oiling knife device includes a right support 17, a right cross slide 18, a right lateral moving device 19, a right lifting device 20, an oiling knife grinding head motor 21, an oiling knife grinding wheel 22, and a right slide 23. The right support 17 is fixed on the support frame 2, the right side of the right support 17 is fixedly connected to the right lateral moving device 19, and the left side of the right cross slide 18 is driven by the right lateral moving device 19 provided on the right support 17 to slide with the lateral slide on the right support 17. The right side is connected by the right lifting device 20 provided on the right slide 23 and is vertically slidably connected to the right side of the right slide 23. The right side of the right slide 23 is fixedly connected to the oiling knife grinding head motor 21. The lower end of the output shaft of the oiling knife grinding head motor 21 is fixedly connected to the oiling knife grinding wheel 22; so as to facilitate the adjustment of the lateral feed position of the oiling knife grinding wheel 22 to the lower cutting surface of the tool through the right lateral moving device 19, and then adjust the grinding feed amount of the oiling knife grinding wheel 22 through the right lifting device 20.

[0058] As attached Figure 7 , 8 As shown, the present invention can be provided with a grinding head rotation angle adjustment planting between the lifting device and the main grinding head motor, between the left lifting device and the lower oil knife grinding head motor, and a grinding head rotation angle adjustment device can be provided between the right lifting device and the lower oil knife grinding head motor, which includes a swivel seat 24, a connecting shaft 25, a support block 26, a support plate 27, a pointer 28, an angle identification plate 29, a main adjustment screw 30 and an adjustment handle 31. One end of the swivel seat is rotatably connected to the slide via the connecting shaft, and the other end is fixedly connected to the main grinding head motor. The left and right sides of the swivel seat are arcuate surfaces respectively, and the center of the arcuate surface is concentric with the axis of the connecting shaft. An angle identification plate is installed on the arcuate surface on one side of the swivel seat. The upper end of the swivel seat is fixed A support plate is fixedly provided, a pointer is provided on one side of the ram, a support block is fixedly provided on the ram, the pointer corresponds to the angle plate, and after the main adjusting screw 30 is threaded through the support block, one end thereof is threadedly connected to the support shaft 32 hinged on the support plate, and the rear portion is fixedly connected to the adjusting handle 31, so as to facilitate the main adjusting screw 30 to rotate by rotating the adjusting handle 31, so that the support plate 27 moves axially along the main adjusting screw 30 under the rotation of the main adjusting screw 30, thereby driving the swivel seat to rotate, and the swivel seat drives the main grinding head motor and the main grinding head to rotate a certain angle, and the angle is observed by observing the correspondence between the angle plate and the pointer to observe the precise angle of rotation of the motor swivel seat, thereby accurately adjusting the rotation angle of the main grinding head.

[0059] As attached Figure 1As shown in or 3, the present invention can provide at least two arc guide grooves 32 in a circular array on the end face of the swivel seat 24 with the axis of the connecting shaft as the center, and the arc of the arc guide groove 32 is on the circumference of the same diameter. The guide bolt 33 passes through the arc guide groove 32 and is fixedly connected to the slide 6 and / or the left slide 16 and / or the right slide 23, so that the swivel seat 24 rotates through the connecting shaft 25 during the rotation process, and moves along the arc track 32 of the arc guide groove through the guide bolt 33, thereby accurately adjusting the rotation angle.

[0060] like Figure 1 , 2 As shown in , 3 and 4, the lifting device of the present invention is composed of a main grinding head lifting drive device 34, a gear box 35, a worm wheel 36, a worm 37, a ball screw pair 38 and a nut seat 39. The main grinding head lifting drive device 34 and the gear box 35 are respectively fixed on the support frame 2. The main grinding head lifting drive device 34 is connected to the worm 37 through the gear box 35. The worm 37 is fixedly connected to the stand 5 through a bearing. The worm 37 is meshed with the worm wheel 36. The worm wheel 36 is fixed on the ball screw pair 38. 8, the ball screw pair 38 is threadedly connected with a nut seat 39, the upper and lower ends of the ball screw pair 38 are respectively fixed to the upper and lower ends of the stand 5 through bearings, the nut seat 39 is fixed to the ram 6, the left and right sides of the ram 6 are respectively slidably connected with the slideways provided on the stand 5, and the main grinding head lifting drive device 34 drives the worm wheel 36 and worm 37 through the gear box 35 to drive the ball screw pair 38 to rotate, drive the ram 6 to move up and down, and then drive the main grinding head to move up and down to achieve accurate grinding feed;

[0061] As attached Figure 6 As shown, the left lifting device is composed of a lower oil knife lifting power source 40, a left ball screw pair 41, and a left fixed nut 42. The left ball screw pair 41 is installed at the center of the left support 10, and left slideways are respectively provided on both sides. The left ball screw pair 41 is driven by the upper oil knife lifting power source. The lower oil knife lifting power source can be driven by a motor. When the motor is driven, the motor is controlled by a control device; it can also be manually driven; a left fixed nut 42 is threadedly connected to the left ball screw pair 41, and the center of the left ram 16 is fixedly connected to the left fixed nut 42. The two sides of the left ram 16 are respectively slidably connected to the left slideway on the left support 10, and the left ball screw pair 41 is driven to rotate by the lower oil knife lifting power source, thereby driving the left fixed nut 42 to move up and down, and the left fixed nut 42 drives the left ram 16 to move up and down along the left slideway, thereby making the lower oil knife grinding head on the left ram 16 move up and down accurately;

[0062] Similarly, if Figure 7As shown, the right lifting device is composed of an oiling knife lifting power source 43, a right ball screw pair 44, and a right fixed nut 45. The right ball screw pair 44 is installed at the center of the right support 17, and right slideways are respectively provided on both sides. The right ball screw pair 44 is driven by the oiling knife lifting power source 43, and the right fixed nut 45 is threadedly connected on the right ball screw pair 44. The center of the right slide ram 23 is fixedly connected with the right fixed nut 45, and the two sides of the right slide ram 23 are respectively slidably connected with the right slideway on the right support 17. The right ball screw pair 44 is driven to rotate by the oiling knife lifting power source, driving the right fixed nut 45 to move up and down, and the right fixed nut 45 drives the right slide ram 23 to move up and down along the right slideway, thereby making the oiling knife grinding head on the right slide ram 23 move up and down accurately.

[0063] As attached Figure 4 , 5 As shown in , 17, the main grinding head lifting drive device of the present invention includes a manual rough feeding device and an electric fine feeding device, the manual rough feeding device is composed of a clutch gear handwheel 96, a handwheel shaft 97, a bearing 98, and a support plate 99, the handwheel shaft is supported and fixed to the support plate fixed on the support frame through the bearing, one end of the handwheel shaft is connected to the large synchronous pulley in the gear box, and the other end is fixedly connected to the clutch gear handwheel, so as to facilitate the handwheel shaft to rotate through the clutch gear handwheel, the handwheel shaft drives the worm wheel 36 and the worm 37 through the large synchronous pulley and the synchronous belt in the gear box, drives the ball screw pair 38 to rotate, drives the slide 6 to move up and down along the slideway on the stand through the nut seat, and then drives the main grinding head to move up and down to realize the main grinding head grinding wheel quickly approaching the tool to be ground surface;

[0064] The electric fine feed device includes a main grinding head motor 34 drive, and the main grinding head motor is controlled by a control device to facilitate the control of the main grinding head motor through the program of the control device to drive the small synchronous pulley in the gear box and the synchronous belt to drive the worm wheel 36 and worm 37 to drive the ball screw pair 38 to rotate, and drive the slide 6 to move up and down along the slide on the stand through the nut seat, thereby driving the main grinding head to move up and down to achieve 0.01mm fine feed grinding of the main grinding head.

[0065] As attached Figure 6 , 7As shown in Figures 8, 9 and 10, when the lower oil knife lifting power source 40 and / or the upper oil knife lifting power source 43 of the present invention are manually controlled, they include a worm gear box 46, a turntable 47, a positioning pin assembly 48, a rotating handle 58, a scale handle 50, and a fine-tuning pointer 51. The worm gear box 46 is provided with a primary worm wheel (not shown in the figure), a primary worm 52, a secondary worm wheel 53, a secondary worm 54, a primary composite shaft sleeve 55, and a secondary composite shaft sleeve 56. The outer wall of the worm gear box 46 is provided with a pointer 51. The screws of the left ball screw pair and / or the right ball screw pair extend into the worm gear box 46 and are fixedly connected to the primary worm wheel. One end of the primary worm 52 is meshed with the primary worm wheel, and the other end is fixedly connected to the turntable 47 via a key. The primary worm 52 is movably sleeved with a primary composite shaft sleeve 55, and the primary composite shaft sleeve 55 is fixedly sleeved with a secondary worm wheel 5 3. A positioning hole is provided on the end face of the secondary worm wheel 53. The secondary worm wheel 53 is meshed with the secondary worm 54. The secondary worm 54 is fixedly connected to the end cover 57 fixed to the worm gear box 46 through the secondary composite sleeve 56. One end of the secondary worm 54 extends out of the end cover and is fixedly connected to the scale handle 50. The scale handle 50 is engraved with scales on the circumference. The fine-tuning pointer corresponds to the scale. The outer circumference of the turntable 47 is provided with scales. A rotating handle 58 is fixed to the outer end of the turntable. The turntable 47 is provided with a positioning pin through hole and a positioning pin positioning hole. The pointer corresponds to the scale, so as to accurately control the feed amount of the lower oil knife or the upper oil knife through the pointer and the scale. The positioning through hole is smaller than the positioning pin positioning hole and is on the same axis. The horizontal diameter of the positioning pin positioning hole is smaller than the vertical diameter. A positioning bar card slot (not shown in the figure) is provided on the outer end face of the horizontal diameter.

[0066] The positioning pin assembly 48 is composed of a pin shaft 59, a positioning bar 60, a return spring 61, a positioning pin handle 62 and a retaining ring 63. The retaining ring 63 is fixed in the positioning pin positioning hole, and the inner hole of the retaining ring 63 is smaller than the positioning pin through-hole. The pin shaft 59 is vertically fixedly connected with the positioning bar 60. After the pin shaft 59 passes through the positioning pin positioning hole, the retaining ring 63 and the return spring 61 provided in the positioning pin through-hole in sequence, the inner end is plugged into the positioning hole 64 of the secondary worm gear 53, and the outer end is fixedly connected with the positioning pin handle 62. One end of the return spring 61 conflicts with the shaft shoulder on the pin shaft 59, and the other end conflicts with the retaining ring 63 fixed in the positioning pin positioning hole. The positioning bar 60 conflicts with the retaining ring 63 through the tension of the return spring 61.

[0067] When the pin shaft 59 is separated from the positioning hole 64 of the second-stage turbine 53, the positioning bar 60 is rotated 90 degrees and plugged into the positioning bar slot at the end of the positioning pin positioning hole;

[0068] In order to facilitate the rough feeding of the lower oil knife grinding head 15 or the upper oil knife grinding head 22, the positioning pin handle 62 is held to pull the pin shaft 59 outward and rotate it 90 degrees. The pin shaft 59 is stuck in the positioning bar slot through the positioning bar 60. At this time, the pin shaft 59 is separated from the secondary worm gear 53, and then the positioning pin handle 62 is rotated, the turntable 47 drives the primary worm 52 to rotate, the primary worm 52 drives the primary worm gear to rotate, the primary worm gear drives the left ball screw pair and / or the right ball screw pair to rotate, the left ball screw pair drives the left fixing nut and / or the right ball screw pair drives the right fixing nut to move, the left fixing nut drives the left slide to move along the left slide, and / or the right fixing nut drives the right slide to move along the right slide, thereby realizing the rough feeding cutting of the upper oil knife grinding head and / or the lower oil knife grinding head quickly approaching the tool to be ground surface;

[0069] When fine feeding is performed on the lower oil knife grinding head 15 or the upper oil knife grinding head 22, the positioning pin handle is rotated 90 degrees, the pin shaft 59 is reset under the tension of the reset spring 61, and the inner end of the pin shaft 59 is inserted into the positioning hole of the secondary worm gear 53. The pin shaft 59 connects the secondary worm gear 53 and the turntable 47 together, and the scale handle 50 is rotated one circle. The 0 degree scale line on the scale handle 50 corresponds to the reference scale line, which means that the scale handle rotates one circle, the secondary worm 54 drives the secondary turbine 53, the secondary turbine 53 drives the turntable 47, the turntable 47 drives the primary worm 52, the primary worm 52 drives the primary turbine, and the primary turbine drives the left ball screw pair and / or the right ball screw pair to move a distance of 0.01 mm, thereby realizing fine feeding cutting of the lower oil knife grinding head and / or the upper oil knife grinding head.

[0070] As attached Fig.10 As shown, the present invention can also be provided with a turntable anti-rotation device at the outer end of the turntable 47, which includes a locking handle 65 and a locking screw 66. The outer end of the turntable 47 is provided with a threaded through hole in the axial direction, and the locking screw 66 is threadedly connected to the threaded through hole. The outer end of the locking screw 66 is fixedly connected to the locking handle 65. When anti-rotation is required, the inner end contacts the worm gear box 46 to facilitate restraining the rotation of the turntable through the anti-rotation device. When the turntable 47 rotates, the locking handle 65 is rotated in the opposite direction, and the inner end of the locking screw 66 is separated from the worm gear box 46, thereby further achieving the effect of high grinding accuracy.

[0071] As attached Figure 6As shown, the left lateral moving device of the present invention is composed of a left lateral guide rail 88, a left screw rod 89, a left guide nut 90, a left bearing support and a left hand wheel 91. The left cross slide seat 11 is movably connected to the left horizontal slideway of the left support 10 via the left lateral guide rail 88. The left cross slide seat 11 is threadedly connected to the left screw rod 89 via the left guide nut 90. The left screw rod 89 is horizontally arranged between the horizontal slideways of the left support 10. The left screw rod 89 is fixedly connected via the left bearing support fixed at the front and rear ends of the left support 10. One end of the left screw rod 89 is fixedly connected to the left hand wheel 91, so as to facilitate the rotation of the left screw rod 89 through the left hand wheel 91. The left guide nut 90 on the left screw rod 89 is driven to move laterally along the left horizontal slideway on the left support 10, thereby driving the lower oil knife device to move laterally to adjust the lateral position of the lower oil knife device.

[0072] As attached Figure 7 As shown, the right lateral moving device is composed of a right lateral guide rail 92, a right screw rod 93, a right guide nut 94, a right bearing support and a right-hand wheel 95. The right cross slide seat 18 is movably connected to the right horizontal slideway of the right support via the right lateral guide rail. The right cross slide seat is threadedly connected to the right screw rod via the right guide nut. The right screw rod is horizontally arranged between the horizontal slideways of the right support. The right screw rod is fixedly connected via the right bearing support fixed at the front and rear ends of the right support. One end of the right screw rod is fixedly connected to the right-hand wheel to facilitate the rotation of the right screw rod through the right-hand wheel. The right guide nut on the right screw rod drives the right horizontal slideway on the right support to move laterally, thereby driving the oiling knife device to move laterally to adjust the lateral position of the oiling knife device.

[0073] As attached Figure 4 As shown, the main grinding head of the present invention is fixedly connected to the main grinding head motor through a connecting device, and the connecting device is composed of a connecting body 87, a grinding wheel shaft 81, an upper bearing 82, a lower bearing 83, a spacer 85, and a locking nut 86. The lower end of the grinding wheel shaft 81 is fixedly connected to the main grinding head 9, and the upper end is fixedly plugged with the output shaft of the main grinding head motor 8 through the motor socket provided at the axis. The outer periphery of the grinding wheel shaft 81 is fixedly connected to the connecting body 87 through the upper bearing 82 and the outer ring of the lower bearing 83 respectively, and the upper end of the connecting body 87 is fixedly connected to the housing of the main grinding head motor 8. The upper end of the inner ring of the upper bearing 82 is fixedly abutted and fixed with the locking nut 86 threadedly fixed on the grinding wheel shaft 81, and the lower end of the inner ring is fixedly abutted and fixed with the spacer 85. The upper end of the inner ring of the lower bearing 83 is fixedly abutted and fixed with the spacer 85, and the lower end is fixedly abutted and fixed with the shoulder of the grinding wheel shaft 81, so as to support the grinding wheel shaft through the connecting device to avoid deformation of the grinding wheel shaft during the grinding process and cause low grinding accuracy.

[0074] Similarly, if Figure 6 , 7As shown, the upper oil knife grinding wheel is fixedly connected to the upper oil knife grinding head motor via the upper oil knife connecting device, and the lower oil knife grinding wheel is fixedly connected to the lower oil knife grinding head motor via the lower oil knife connecting device. The structures of the upper oil knife connecting device and the lower oil knife connecting device are the same as the connecting devices, which will not be repeated here.

[0075] The present invention can also provide a baffle 84 at the lower end of the connecting body 87, and the upper end of the baffle 84 is fixed to the shoulder of the grinding wheel shaft 81. The baffle 84 and the corresponding surfaces of the connecting body 87 are movably connected through a labyrinth-type movable boss and groove to prevent metal chips and other debris from entering the bearing and affecting the service life of the bearing.

[0076] As attached Fig.11 , 12 , a knife sharpener as shown in FIG13, comprises a machine body 67, a linear drive device 68, a straight knife electromagnetic suction cup 69, a cooling device 70, a control device 71 and a stroke slider, wherein a guide rail pair is provided at the upper end of the machine body 67, a straight knife electromagnetic suction cup 69 is provided in the middle of the guide rail pair, and stroke sliders are provided at the left and right ends of the machine body respectively, and the stroke sliders can be adjustable, and the position of the stroke sliders can be adjusted according to the tool grinding length to improve the grinding efficiency, and the stroke sliders are controlled by the control device to facilitate the automatic linear grinding of the blade through the stroke sliders at both ends, and the straight knife electromagnetic suction cup 69, the linear drive device 68, and the cooling device 70 are respectively controlled by the control device 7 1 control, characterized in that the guide rail pair at the upper end of the machine body 67 is slidably connected with the slideway provided at the lower end of the supporting frame 2 of the three-grinding head sharpening device as described above, the three-grinding head sharpening device is driven by the linear drive device 68 to move linearly along the guide rail pair, the three-grinding head sharpening device is controlled by the control device 71, and the three-grinding head sharpening is automatically controlled by the control device 71 to move linearly along the guide rail pair, and the three cutting surfaces of the tool are ground by a single clamping, which solves the substantial technical problem that the traditional sharpening machine needs to manually clean the burrs and manually oil the knife after grinding, which not only significantly improves the grinding efficiency, but also significantly improves the grinding quality of the straight knife and the peeling quality of the veneer.

[0077] As attached Fig.14As shown, the cooling device 70 of the present invention comprises a main grinding head cooling pipeline 72, a lower oil knife grinding head cooling pipeline 73, an upper oil knife grinding head cooling pipeline 74, a stop valve 75, a water tank 76 and a water pump 77. The main grinding head cooling pipeline 72, the lower oil knife grinding head cooling pipeline 73 and the upper oil knife grinding head cooling pipeline 74 are respectively installed on the support frame 2. The main grinding head cooling pipeline 73 is located on one side or both sides of the main grinding head to cool the main grinding head during the grinding process. The lower oil knife grinding head cooling pipeline 73 is located on the support frame 2. On one side of the lower oil knife grinding head, it is used to cool the lower oil knife grinding head during the grinding process. The upper oil knife grinding head cooling pipeline 74 is located on one side of the upper oil knife grinding head, which is used to cool the upper oil knife grinding head during the grinding process and extend the service life of the grinding head. The main grinding head cooling pipeline 72, the lower oil knife grinding head cooling pipeline 73, and the upper oil knife grinding head cooling pipeline 74 are respectively connected to the main pipeline 78 through the stop valve and the three-way valve. The main pipeline 78 is connected to the water tank 76 through the water pump 77, and the water pump is controlled by the control device.

[0078] As attached Fig.15 As shown, the present invention can be provided with a solid-liquid recovery device on one side of the fuselage, which includes a permanent magnetic separator 79 and a debris recovery box 80, the liquid inlet of the permanent magnetic separator 79 is connected to the liquid outlet of the fuselage, the liquid outlet of the separator is connected to the water tank 76, and the chip outlet of the permanent magnetic separator 79 is connected to the debris recovery box 80. The permanent magnetic separator 79 is controlled by a control device to facilitate solid-liquid separation of the liquid containing metal debris discharged from the fuselage through the permanent magnetic separator 79, which not only significantly saves coolant, but also recycles the metal debris, thereby solving the substantial technical problem of low work efficiency caused by manual cleaning of the coolant in the fuselage. The structure of the permanent magnetic separator described in the present invention is prior art and will not be repeated here.

[0079] The control device of the present invention can adopt a PLC control device to achieve automatic control of the program.

[0080] The linear drive device described in the present invention can be driven by a ball screw pair, a nut seat and a servo motor, or by a gear, a rack and a servo motor. The present invention preferably uses a gear, a rack and a servo motor to achieve smooth transmission and high grinding accuracy.

[0081] The guide rail pair of the present invention adopts a linear guide rail pair to achieve the effects of good straightness, small guide rail gap and high tool grinding accuracy.

[0082] The structure of the straight knife electromagnetic chuck 69 of the present invention is the same as that of the prior art, and will not be described in detail here.

[0083] Before grinding the straight blade, the clutch handwheel is manually rotated, and the clutch handwheel drives the handwheel shaft to rotate. The handwheel shaft drives the worm wheel 36 and the worm 37 through the large synchronous pulley and the synchronous belt in the gear box, drives the ball screw pair 38 to rotate, and drives the ram 6 to move down along the slideway on the stand through the nut seat, so that the main grinding head grinding wheel quickly approaches the tool to be ground.

[0084] Then, the left screw 89 is driven to rotate by the left hand wheel 91, and the left guide nut 90 on the left screw 89 is driven to move laterally along the left horizontal slideway on the left support 10, thereby driving the lower oil knife device to move laterally to adjust the lateral position of the lower oil knife device; similarly, the right screw is driven to rotate by the right hand wheel, and the right guide nut on the right screw is driven to move laterally along the right horizontal slideway on the right support, thereby driving the upper oil knife device to move laterally to adjust the lateral position of the upper oil knife device;

[0085] When the upper end surface of the straight blade is subjected to rough feed grinding, the manual button on the control panel is clicked, and the hand wheel is manually rotated to drive the driving shaft to rotate. The driving shaft drives the worm 37 to rotate through the synchronous belt, and the worm 37 drives the ball screw pair 38 to rotate, driving the slide 6 to move downward, and driving the main grinding head to move downward to adjust the initial feed amount of the rough feed of the straight blade. After the adjustment is completed, the main grinding head grinding button on the control panel is clicked, and the feed gear button and the single feed or double feed button are selected according to the grinding requirements. The feed gear button is usually set to 10 gears, and the motorized feed amount corresponding to each gear is different. It is adjusted according to the actual grinding situation, and it stops automatically after the grinding is completed; the main grinding head controls the main grinding head motor and the travel motor along the control device to drive the three-head grinding device to move linearly along the guide rail pair on the machine body to grind the inclined surface of the straight blade, and the stroke of the three-head grinding device is monitored by the stroke module;

[0086] When the upper end surface of the straight blade is roughly ground, the bevel of the straight blade is roughly ground, and the grinding head stop button and the manual button are clicked. When the turntable 47 rotates, the locking handle 65 is rotated in the opposite direction, and the inner end of the locking screw 66 is separated from the worm gear box 46. The adjusting handle 31 is rotated to drive the main adjusting screw 30 to rotate, so that the support plate 27 moves along the axial direction of the main adjusting screw 30 under the rotation of the main adjusting screw 30, thereby driving the swivel seat to rotate, and the swivel seat drives the main grinding head motor and the main grinding head to rotate a certain angle. The angle is determined by visually observing the angle mark and the pointer to determine the precise angle of rotation of the motor swivel seat, and then the main grinding head rotation angle is accurately adjusted, and then the turntable is constrained to rotate by the anti-rotation device. Then, the grinding head start button and the automatic button are clicked, and the main grinding head controls the main grinding head motor and the travel motor along the control device, driving the three-grinding head grinding device to move linearly along the guide rail pair on the machine body to perform rough feed grinding on the bevel of the straight blade;

[0087] When the bevel of the straight blade is to be finely ground, the program instructions of the control device cause the main grinding head motor to drive the small synchronous pulley and the synchronous belt in the gear box to drive the worm wheel 36 and worm 37 to drive the ball screw pair 38 to rotate, and drive the slide 6 to move up and down along the slide on the stand through the nut seat, thereby driving the main grinding head to perform 0.01mm fine feed grinding on the bevel of the straight blade.

[0088] The main grinding head has finished rough and fine grinding; start to adjust the grinding head rotation angle of the lower oil knife grinding wheel, rotate the adjustment handle 31, drive the main adjustment screw 30 to rotate, so that the support plate 27 moves along the axial direction of the main adjustment screw 30 under the rotation of the main adjustment screw 30, and then drives the swivel seat to rotate, and the swivel seat drives the lower oil knife grinding wheel to rotate a certain angle. The angle is observed by observing the correspondence between the angle plate and the pointer to observe the precise angle of rotation of the motor swivel seat, and then accurately adjust the grinding head rotation angle of the lower oil knife grinding wheel;

[0089] Then adjust the lower end surface of the straight blade before grinding.

[0090] Pull out the positioning pin handle 62 in the lower oil knife device, hold the positioning pin handle 62 to pull out the pin shaft 59 and rotate it 90 degrees, the pin shaft 59 is stuck in the positioning bar slot through the positioning bar 60, at this time the pin shaft 59 is separated from the secondary worm gear 53, and then rotate the positioning pin handle 62, the turntable 47 drives the primary worm 52 to rotate, the primary worm 52 drives the primary worm gear to rotate, the primary worm gear drives the left ball screw pair to rotate, the left ball screw pair drives the left fixed nut to move, the left fixed nut drives the left slide to move along the left slideway, and then adjust the rough feed grinding amount of the lower oil knife, and then click the left start button on the control panel, the lower oil knife grinding head motor rotates under the command of the control device, driving the lower oil knife grinding head grinding wheel to quickly approach the tool to be ground surface;

[0091] Then, the lower end surface of the straight blade is finely fed and ground. The positioning pin handle is rotated 90 degrees. The pin shaft 59 is reset under the tension of the reset spring 61. The inner end of the pin shaft 59 is inserted into the positioning hole of the secondary worm gear 53. The pin shaft 59 connects the secondary worm gear 53 and the turntable 47. The scale handle 50 is rotated for one circle. The 0 degree scale line on the scale handle 50 corresponds to the reference scale line, which means that the scale handle rotates for one circle. The secondary worm 54 drives the secondary turbine 53, the secondary turbine 53 drives the turntable 47, the turntable 47 drives the primary worm 52, the primary worm 52 drives the primary turbine, and the primary turbine drives the left ball screw pair to move a distance of 0.01 mm. The cutting amount of fine feed can be selected according to the cutting needs, thereby realizing the adjustment amount of fine feed of the lower oil knife grinding head. Click the left start button on the control panel. The lower oil knife grinding head motor rotates under the command of the control device, driving the lower oil knife grinding head to perform fine feed grinding on the lower end surface of the straight blade, and automatically stops after grinding.

[0092] When the lower end face is finished, start adjusting the oil knife device to finish the blade surface at the tip of the straight blade. The adjustment and movement process of the finishing are the same as those of the oil knife device, so it will not be repeated here.

[0093] In the process of coarse and fine grinding of the three surfaces of the straight blade in sequence, there is no need to repeatedly clamp the straight blade. The tool can be clamped once to complete the coarse and fine grinding process, so that the straightness of the cutting edge after grinding is very high, and the surface finish of the cutting edge reaches the brightness of a mirror. This solves the substantial technical problem of the cumbersome steps of manually cleaning burrs and manually oiling the knife after grinding with a traditional knife grinder.

[0094] During the grinding process, the main grinding head, the lower oil knife grinding wheel or the upper oil knife grinding wheel are cooled by the cooling device, and the liquid containing the chips flows back through the inner cavity of the machine body to the permanent magnetic separator for separation of the chips and the coolant. After separation, the coolant returns to the water tank, and the chips are recovered in the chip recovery box.

[0095] Then, by rotating the adjustment handle 31, the main adjustment screw 30 is driven to rotate, so that the support plate 27 moves along the axial direction of the main adjustment screw 30 under the rotation of the main adjustment screw 30, thereby driving the rotating seat to rotate, and the rotating seat drives the main grinding head motor and the main grinding head to rotate to the required cutting angle. The angle can be quickly observed by observing the correspondence between the angle plate and the pointer to quickly observe the precise angle of rotation of the motor rotating seat, thereby accurately adjusting the rotation angle of the main grinding head;

[0096] Similarly, adjust the grinding amount and grinding angle of the upper oil knife device and the lower oil knife device.

[0097] The present invention has the advantages of novel structure, quick sharpening, high work efficiency, labor cost saving, high straightness of the cutting edge, high smoothness of the cutting edge, and small smoothness of the single plate cut out, i.e., small thickness error, etc. due to the adoption of the above structure.

Claims

1. A three-grinding head sharpening device, comprising a main sharpening device and a supporting frame, wherein the main sharpening device is fixed on the supporting frame, characterized in that The support frame is provided with a lower oil knife device on the left side and an upper oil knife device on the right side; The main grinding device comprises a stand, a ram, a lifting device, a main grinding head motor and a main grinding head. The lower end of the stand is fixedly connected to the support frame. The lifting device drives the ram to slide vertically relative to the stand. The main grinding head motor is fixed on the ram. The main grinding head is fixed at the lower end of the output shaft of the main grinding head motor. The lower oil knife device comprises a left lifting device, a lower oil knife grinding head motor, a lower oil knife grinding wheel, and a left ram. The left side of the left ram is fixedly connected to the lower oil knife grinding head motor. The lower end of the output shaft of the lower oil knife grinding head motor is fixedly connected to the lower oil knife grinding wheel. The left lifting device drives the lower oil knife grinding head motor to rise and fall. The oiling knife device comprises a right lifting device, an oiling knife grinding head motor, an oiling knife grinding wheel, and a right ram. The right side of the right ram is fixedly connected to the oiling knife grinding head motor. The lower end of the output shaft of the oiling knife grinding head motor is fixedly connected to the oiling knife grinding wheel. The right lifting device drives the oiling knife grinding head motor to rise and fall. The left lifting device comprises a lower oil knife lifting power source, a left ball screw pair, and a left fixed nut. The left ball screw pair is driven by the lower oil knife lifting power source. A left fixed nut is threadedly connected to the left ball screw pair. The center of the left ram is fixedly connected to the left fixed nut. The right lifting device comprises an oiling knife lifting power source, a right ball screw pair, and a right fixing nut. The right ball screw pair is driven by the oiling knife lifting power source. The right ball screw pair is threadedly connected with a right fixing nut. The center of the right ram is fixedly connected to the right fixing nut. When the upper oil knife lifting power source and / or the lower oil knife lifting power source are manually controlled, they include a worm gear box, a turntable, a positioning pin assembly, a rotating handle, a scale handle, and a fine-tuning pointer. The worm gear box is provided with a primary worm wheel, a primary worm, a secondary worm wheel, a secondary worm, a primary composite shaft sleeve, and a secondary composite shaft sleeve. The outer wall of the worm gear box is provided with a pointer. The screws of the left ball screw pair and / or the right ball screw pair extend into the worm gear box and are fixedly connected to the primary worm wheel. One end of the primary worm is meshed with the primary worm wheel, and the other end is fixedly connected to the turntable via a key. The movable sleeve on the primary worm is provided with a primary composite shaft sleeve, and the fixed sleeve on the primary composite shaft sleeve is provided with a secondary worm wheel. A positioning hole is provided on the end face of the secondary worm wheel. The secondary worm wheel is meshed with the secondary worm, and the secondary worm is connected to the end cover fixed to the worm gear box via the secondary composite shaft sleeve. One end of the secondary worm extends out of the end cover and The cam is fixedly connected to the scale handle, the scale handle is engraved with scales on the circumference, the fine-tuning pointer corresponds to the scale, the outer circumference of the turntable is provided with scales, a rotating handle is fixed to the outer end of the turntable, a positioning pin through-hole and a positioning pin locating hole are provided on the turntable, the pointer corresponds to the scale, the positioning pin assembly is composed of a pin shaft, a positioning strip, a reset spring, a positioning pin handle and a retaining ring, the retaining ring is fixed in the positioning pin locating hole, and the inner hole of the retaining ring is smaller than the positioning pin through-hole, the pin shaft is vertically fixedly connected to the positioning strip, after the pin shaft passes through the positioning pin locating hole, the retaining ring and the reset spring provided in the positioning pin through-hole in sequence, the inner end is plugged in corresponding to the positioning hole of the secondary worm gear, and the outer end is fixedly connected to the positioning pin handle, one end of the reset spring conflicts with the shaft shoulder on the pin shaft, and the other end conflicts with the retaining ring fixed in the positioning pin locating hole, and the positioning strip conflicts with the retaining ring through the tension of the reset spring; When the pin shaft is separated from the positioning hole of the secondary worm gear, the positioning bar is rotated 90 degrees and plugged into the positioning bar slot at the end of the positioning pin positioning hole; The operation method of the upper oil knife lifting power source and / or the lower oil knife lifting power source is as follows: Pull out the positioning pin handle, hold the positioning pin handle to pull the pin shaft outward and rotate it 90 degrees. The pin shaft is stuck in the positioning bar slot through the positioning bar. At this time, the pin shaft is separated from the secondary worm gear. Then rotate the positioning pin handle, the turntable drives the primary worm to rotate, and the primary worm drives the primary worm gear to rotate, thereby adjusting the coarse feed grinding amount; Rotate the positioning pin handle 90 degrees, the pin shaft is reset under the tension of the reset spring, the inner end of the pin shaft is inserted into the positioning hole of the secondary worm gear, the pin shaft connects the secondary worm gear and the turntable together, rotate the scale handle for one circle, the 0 degree scale line on the scale handle corresponds to the reference scale line, which means that the scale handle rotates for one circle, the secondary worm drives the secondary worm gear, the secondary worm gear drives the turntable, the turntable drives the primary worm, and the primary worm drives the primary worm gear to rotate, so as to adjust the cutting amount of fine feed; The lifting device is composed of a main grinding head lifting drive device, a gear box, a worm wheel, a worm, a ball screw pair, and a nut seat. The main grinding head lifting drive device and the gear box are respectively fixed on the support frame. The main grinding head lifting drive device is connected to the worm through the gear box. The worm is connected to the stand through a bearing. The worm is meshed with the worm wheel. The worm wheel is fixed on the ball screw pair. The nut on the ball screw pair is connected with a nut seat. The upper and lower ends of the ball screw pair are respectively connected to the upper and lower ends of the stand through bearings. The nut seat is fixed on the ram. The left and right guide surfaces of the ram are respectively slidably connected to the slideways provided on the stand. The main grinding head lifting drive device includes a manual rough feed device and an electric fine feed device. The manual rough feed device is composed of a clutch gear handwheel, a handwheel shaft, a bearing, and a support plate. The handwheel shaft is connected to the support plate fixed to the support frame through the bearing. One end of the handwheel shaft is connected to the large synchronous pulley in the gear box, and the other end is fixedly connected to the clutch gear handwheel. The electric fine feeding device includes a main grinding head motor drive, and the main grinding head motor is controlled by a control device; The manual and electric adjustment methods of the main grinding head lifting drive device are as follows: Before grinding the straight blade, manually rotate the clutch handwheel first. The clutch handwheel drives the handwheel shaft to rotate. The handwheel shaft drives the worm gear through the large synchronous pulley and synchronous belt in the gear box, drives the ball screw pair to rotate, and drives the ram to move down along the slideway on the stand through the nut seat, so that the main grinding head grinding wheel quickly approaches the tool to be ground. When the bevel of the straight blade is to be finely ground, the program instruction of the control device causes the main grinding head motor to drive the small synchronous pulley in the gear box and the synchronous belt to drive the worm gear transmission, drive the ball screw pair to rotate, drive the slide ram to move up and down along the slideway on the stand through the nut seat, and then drive the main grinding head to perform fine feed grinding on the bevel of the straight blade; A grinding head rotation angle adjustment device is respectively provided between the lifting device and the main grinding head motor, between the left lifting device and the lower oil knife grinding head motor, and between the right lifting device and the upper oil knife grinding head motor. The grinding head rotation angle adjustment device between the lifting device and the main grinding head motor comprises a swivel seat, a connecting shaft, a support block, a support plate, a pointer, an angle identification plate, a main adjusting screw and an adjusting handle. One end of the swivel seat is rotatably connected to the ram via the connecting shaft, and the other end is fixedly connected to the main grinding head motor. The left and right sides of the swivel seat are respectively arc surfaces, the center of the arc surface is concentric with the axis of the connecting shaft, and an angle identification plate is installed on the arc surface of one side of the swivel seat. A support plate is fixedly provided at the upper end of the swivel seat, a pointer is provided on one side of the ram, and a support block is fixedly provided on the ram. The pointer corresponds to the angle plate. After the main adjusting screw thread passes through the support block, one end thereof is threadedly connected to the support shaft hinged on the support plate, and the rear is fixedly connected to the adjusting handle.

2. A three-grinding head sharpening device according to claim 1, characterized in that The lower oil knife device comprises a left support, a left cross slide seat, and a left lateral moving device. The left support is fixed on the supporting frame. The left side of the left support is fixedly connected to the left lateral moving device. The right side of the left cross slide seat is driven by the left lateral moving device provided on the left support to be slidably connected to the lateral slideway on the left support. The left side is driven by the left lifting device provided on the left ram to be vertically slidably connected to the right side of the left ram. The oiling knife device includes a right support, a right cross slide seat, and a right transverse moving device. The right support is fixed on the supporting frame, the right side of the right support is fixedly connected to the right transverse moving device, the left side of the right cross slide seat is driven by the right transverse moving device provided on the right support to be slidably connected to the transverse slide on the right support, and the right side is driven by the right lifting device provided on the right slide to be vertically slidably connected to the right side of the right slide.

3. A three-grinding head sharpening device according to claim 1 or 2, characterized in that At least two arc-shaped guide grooves are arranged in a circular array with the axis of the connecting shaft as the center, and the arcs of the arc-shaped guide grooves are on the circumference of the same diameter. The guide bolts pass through the arc-shaped guide grooves and are fixedly connected to the slide.

4. A three-grinding head sharpening device according to claim 2, characterized in that A left ball screw pair is installed at the center of the left support, and left slideways are respectively provided on both sides, and both sides of the left ram are respectively slidably connected to the left slideways on the left support; A right ball screw pair is installed at the center of the right support, and right slideways are respectively arranged on both sides. Both sides of the right slide are respectively slidably connected with the right slideways on the right support.

5. A three-grinding head sharpening device according to claim 1, 2 or 4, characterized in that The outer end of the turntable is provided with a turntable anti-rotation device, which includes a locking handle and a locking screw. The outer end of the turntable is axially provided with a threaded through hole, the locking screw is threadedly connected to the threaded through hole, and the outer end of the locking screw is fixedly connected to the locking handle.

6. A three-grinding head sharpening device according to claim 2 or 4, characterized in that The left lateral moving device is composed of a left lateral guide rail, a left screw rod, a left guide nut, a left bearing support and a left hand wheel. The left cross slide seat is slidably connected to the left horizontal slideway of the left support via the left lateral guide rail. The left cross slide seat is threadedly connected to the left screw rod via the left guide nut. The left screw rod is horizontally arranged between the left horizontal slideways of the left support. The left screw rod is connected via the left bearing support fixed at the front and rear ends of the left support. One end of the left screw rod is fixedly connected to the left hand wheel. The right lateral moving device is composed of a right lateral guide rail, a right screw rod, a right guide nut, a right bearing support and a right-hand wheel. The right cross slide seat is slidably connected to the right horizontal slide of the right support via the right lateral guide rail. The right cross slide seat is threadedly connected to the right screw rod via the right guide nut. The right screw rod is horizontally arranged between the right horizontal slide of the right support. The right screw rod is connected via the right bearing support fixed at the front and rear ends of the right support. One end of the right screw rod is fixedly connected to the right-hand wheel.

7. A three-grinding head sharpening device according to claim 1, 2 or 4, characterized in that The main grinding head is fixedly connected to the main grinding head motor via a connecting device, and the connecting device is composed of a connecting body, a grinding wheel shaft, an upper bearing, a lower bearing, a spacer, and a locking nut. The lower end of the grinding wheel shaft is fixedly connected to the main grinding head, and the upper end is fixedly plugged with the output shaft of the main grinding head motor through a motor socket provided at the axis. The outer periphery of the grinding wheel shaft is connected to the connecting body via the upper bearing and the lower bearing outer ring respectively, and the upper end of the connecting body is fixedly connected to the main grinding head motor housing. The upper end of the inner ring of the upper bearing is fixedly in conflict with the locking nut threadedly fixed on the grinding wheel shaft, and the lower end of the inner ring is fixedly in conflict with the spacer. The upper end of the inner ring of the lower bearing is fixedly in conflict with the spacer, and the lower end is fixedly in conflict with the shoulder of the grinding wheel shaft.

8. A three-grinding head sharpening device according to claim 7, characterized in that A baffle is provided at the lower end of the coupling body, the upper end of the baffle is fixed to the shoulder of the grinding wheel shaft, and the baffle and the corresponding surface of the coupling body are movably connected via a boss and a groove that are movably plugged in a labyrinth.

9. A knife sharpener, comprising a machine body, a linear drive device, a straight knife electromagnetic chuck, a cooling device, a control device and a travel slider, wherein a guide rail pair is provided at the upper end of the machine body, a straight knife electromagnetic chuck is provided in the middle of the guide rail pair, and travel sliders are provided at the left and right ends of the machine body respectively, the travel sliders are controlled by the control device, and the straight knife electromagnetic chuck, the linear drive device and the cooling device are respectively controlled by the control device, characterized in that The guide rail pair at the upper end of the fuselage is slidably connected to the slideway provided at the lower end of the supporting frame of the three-grinding-head sharpening device as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 above, and the three-grinding-head sharpening device is driven by a linear drive device to move linearly along the guide rail pair, and the three-grinding-head sharpening device is controlled by a control device.

10. A knife sharpener according to claim 9, characterized in that The cooling device comprises a main grinding head cooling pipeline, a lower oil knife grinding head cooling pipeline, an upper oil knife grinding head cooling pipeline, a stop valve, a water tank and a water pump. The main grinding head cooling pipeline, the lower oil knife grinding head cooling pipeline and the upper oil knife grinding head cooling pipeline are respectively installed on the supporting frame. The main grinding head cooling pipeline is located on one side or both sides of the main grinding head, the lower oil knife grinding head cooling pipeline is located on one side of the lower oil knife grinding head, and the upper oil knife grinding head cooling pipeline is located on one side of the upper oil knife grinding head. The main grinding head cooling pipeline, the lower oil knife grinding head cooling pipeline and the upper oil knife grinding head cooling pipeline are respectively connected to the main pipeline via the stop valve and the three-way valve. The main pipeline is connected to the water tank via the water pump, and the water pump is controlled by the control device.

11. A knife sharpener according to claim 10, characterized in that A solid-liquid recovery device is provided on one side of the fuselage, which includes a permanent magnet separator and a debris recovery box. The liquid inlet of the permanent magnet separator is connected to the liquid outlet of the fuselage, the liquid outlet of the permanent magnet separator is connected to the water tank, the chip outlet of the permanent magnet separator is connected to the debris recovery box, and the permanent magnet separator is controlled by a control device.

12. A knife sharpener according to claim 9, characterized in that The control device may be a PLC control device.

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