A CNC woodworking inner arc surface milling machine

Abstract

The present invention provides a CNC woodworking internal arc milling machine, comprising a cutting device, a feeding device, a positioning device, a dust removal device, a rotary table, a bed and an automatic control system; the rotary table is horizontally arranged above the bed; the lower part of the cutting device is arranged at the lower side of the bed, and the upper part is inserted into the rotary table; the feeding device is arranged under the bed, and is used to drive the cutting device and the rotary table; the positioning device is arranged on the rotary table, and the dust removal device is arranged above the cutting device and below the workpiece to be cut; the automatic control system is electrically connected to the feeding device. The present invention is suitable for mass-produced processing of internal arc surfaces of connecting elbows of different radii for wooden structures. The equipment is simple to operate and can be produced continuously. The clamping and disassembly of the products are convenient and quick. While the equipment is cutting and processing, other products can be installed and disassembled, which greatly improves the production efficiency. The equipment has low manufacturing cost, small footprint, reliable operation, and high product processing accuracy.

Description

Technical Field

[0001] The invention relates to woodworking inner arc surface technology, in particular to a numerically controlled woodworking inner arc surface milling machine. Background Art

[0002] With the country's emphasis on environmental protection and energy-saving projects and the rise of wooden structures at home and abroad, the requirements for the structure and appearance of wooden structures are becoming higher and higher. Some traditional installation methods and processing methods are constantly being improved, and the parts of wooden structure products are gradually simplified, standardized and standardized. They are processed into standard parts in the factory and assembled on the construction site. At the same time, they also require their supporting processing equipment to be high-precision, high-efficiency and professional. Figure 1 It is a traditional wooden building wall overlap method, which is connected by 65 overlaps of wooden structure walls; Figure 2 It is a standard angle connection method for existing wooden structure buildings, including a wooden structure wall 65 and a wall connection angle 66.

[0003] At present, there are three relatively advanced methods for processing the inner arc surface of wooden structure corners in China, namely vertical CNC machining center, woodworking CNC milling machine and woodworking copy milling machine.

[0004] The vertical CNC machining center and woodworking CNC milling machine process the inner arc surface of the product by fixing the raw material on the worktable, which moves horizontally along the X-axis and Y-axis with the worktable. The milling cutter is installed vertically to rotate, and the tool moves vertically along the main axis. The entire action is controlled by the program, and the outer surface of the material is cut into an arc shape through the rotation of the tool.

[0005] The woodworking copy milling machine processes the inner arc surface of the corner by processing a metal backing plate with the same arc radius as the product, fixing it on the bed, and fixing the product to be processed on a workbench that can move in both directions. The workbench moves along the trajectory of the backing plate to process the inner arc surface of the product, and the material is cut into shape by the rotation of the tool.

[0006] The above three processing methods can only process one piece in one clamping process. The raw materials can only be loaded and unloaded when the equipment is completely stopped. The tools are mostly installed vertically. Due to the influence of the equipment strength, multiple reciprocating motions are required to process the material into shape. The equipment cost is high, the product often has tool connection phenomenon, the production efficiency is low, the labor intensity is high, and it is not suitable for mass production of standardized products. Summary of the invention

[0007] The purpose of the present invention is to propose a CNC woodworking inner arc surface milling machine to address the many problems in the current processing of the inner arc surface of the bent corners of wooden structures. The machine is suitable for mass-produced processing of the inner arc surfaces of connecting elbows of different radii for wooden structure buildings. The equipment is simple to operate and can be produced continuously. The clamping and disassembly of the products are convenient and quick. Other products can be installed and disassembled while the equipment is cutting and processing, which greatly improves the production efficiency. The production efficiency of the same product is 5-10 times that of a machining center. The equipment has low manufacturing cost, small footprint, reliable operation, and high product processing accuracy.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is: a CNC woodworking internal arc milling machine, including a cutting device, a feeding device, a positioning device, a dust removal device, a rotating worktable, a bed and an automatic control system.

[0009] A rotating worktable is horizontally arranged above the bed; the lower part of the cutting device is arranged on the lower side of the bed, and the upper part is inserted into the rotating worktable; the feeding device is arranged under the bed, and is used to drive the cutting device and the rotating worktable; the positioning device is arranged on the rotating worktable, and the dust removal device is arranged above the cutting device and below the workpiece to be cut; the automatic control system is electrically connected to the feeding device.

[0010] Furthermore, a base frame is provided at the bottom of the bed, a dovetail lower guide rail is fixed on the base frame, a dovetail upper guide rail is matched on the dovetail lower guide rail, and a motor seat is fixed above the dovetail upper guide rail; the feeding device is installed on the motor seat through the motor plate; the motor seat adjustment block is installed on the motor seat, the adjustment bolt is installed on the motor seat adjustment block, and the other end is threadedly connected with the motor plate, and the position of the motor plate is adjusted by the adjustment bolt on the motor seat adjustment block, driving the tool shaft motor to move left and right, the tool shaft motor flat belt pulley is installed on the tool shaft motor, and the tool shaft motor flat belt pulley moves left and right with the tool shaft motor, thereby realizing the tensioning of the flat belt; the cutting device is installed on the motor seat, and the dovetail guide rail is rotated to adjust the screw rod to make the dovetail upper guide rail slide left and right, which can realize the left and right position adjustment of the fixed sleeve, and the specific position is adjusted according to the inner arc size of the workpiece. The tool spindle of the cutting device is perpendicular to the dovetail upper guide rail and the rotating worktable table.

[0011] Furthermore, the feeding device includes a tool shaft motor, and a tool shaft motor flat belt pulley is provided at the output end of the tool shaft motor. The tool shaft motor flat belt pulley adopts an arc structure, which makes it easier to tighten the flat belt, prevent the flat belt from falling off when it is loose, and prevent the flat belt from axial movement, thereby extending the service life of the flat belt. The tool shaft motor transmits torque to the cutting device through the tool shaft motor flat belt pulley and the flat belt.

[0012] The feeding device also includes a workbench motor, which is mounted on a motor base plate, which is fixed to the base frame with bolts. The motor base plate is milled with a long hole. Loosening the bolts can adjust the position of the motor base plate to the left and right, thereby driving the workbench motor to move left and right. The workbench motor pulley is mounted on the workbench motor. The left and right movement of the workbench motor drives the workbench motor pulley to move left and right, thereby realizing the tension transmission V-belt. After the workbench motor is started, the workbench motor pulley rotates, and the guide shaft pulley is driven to rotate through the V-belt. The guide shaft pulley is mounted on the guide shaft, and the guide shaft is fixed to the guide shaft seat through the guide shaft bearing. The guide shaft seat is mounted on the base frame. The guide shaft pinion is installed at the other end of the guide shaft, and the guide shaft pinion is meshed with the internal gear of the rotating workbench. The workbench motor transmits torque to drive the rotating workbench to rotate at a low uniform speed. The inverter can be used to adjust the workbench speed, thereby ensuring the surface processing quality and reasonable process time configuration.

[0013] Furthermore, the rotating worktable includes an inner gear of the worktable, a turntable nylon sleeve, an outer ring, a nylon sleeve slider, and an outer protective cover. The inner gear of the worktable is installed on the rotating worktable, the outer ring is installed on the outer ring frame, and the outer ring frame is installed on the base frame. The height can be fine-tuned by adjusting the screws. After the final assembly is completed, the parallelism of the worktable with the ground plane is adjusted. The nylon sleeve slider is installed in the outer ring, and the nylon sleeve slider is connected to the outer circular wall of the worktable with screws to prevent the worktable from moving up and down during work and ensure the processing accuracy; the outer protective cover is installed on the outer circle of the rotating worktable to prevent the exposed screws from scratching the workers when the worktable rotates.

[0014] Furthermore, the cutting device includes a tool spindle, a tool, a movable sleeve, a fixed sleeve and a flat pulley. One end of the tool spindle is coaxially rigidly connected to the flat pulley, and the other end is sleeved with the tool. The flat pulley can drive the tool fixed on the tool spindle to perform a rotary cutting motion. The axial section cutting edge size of the tool is the same as the cross-sectional size of the workpiece being processed; the end of the tool spindle on which the tool is sleeved is threadedly connected to the tool locking nut, and a tool gasket is arranged between the tool locking nut and the tool.

[0015] The tool spindle is installed in the movable sleeve through the bearing, and the bearing end cover and the sealing ring adopt axial labyrinth seal, which is positioned by axial labyrinth seal to prevent wood chips and dust from entering the bearing; the outer diameter of the movable sleeve and the inner diameter of the fixed sleeve adopt clearance fit, and the first locking bolts are installed at the upper and lower ends of the fixed sleeve. After the first locking bolts are tightened, the movable sleeve is fixed to the fixed sleeve; the end of the movable sleeve close to the flat pulley is fixed with a bearing end cover, and the retaining ring is installed between the tool spindle bearing and the flat pulley to position the pulley and prevent dust; the gasket is installed on the tool The spindle end is fixed with a locking bolt and a flat key to fix the flat pulley; the bearing end cover is fixed with an adjusting nut, the fixed sleeve is fixed with an adjusting bracket, one end of the adjusting screw is installed on the adjusting bracket through a pressure bearing and a first locking nut, and the other end is threaded with the adjusting nut. The locking nut is installed on the adjusting screw. After locking, the adjusting screw is fixed; after loosening, the adjusting screw is rotated to drive the bearing end cover to move left and right through the adjusting nut, thereby changing the position of the moving sleeve 8 and the fixed sleeve in the axial direction. The first locking bolt is loosened before adjustment, and the first locking bolt is locked after adjustment. The moving sleeve drives the tool to move along the axial direction, and the inner arc size of the workpiece cut by the tool is adjusted, thereby changing the arc radius of the workpiece.

[0016] Furthermore, the rotation direction of the tool spindle is opposite to the rotation direction of the rotary table, and the tool spindle drives the tool fixed thereon to perform a rotary cutting motion.

[0017] Furthermore, the positioning device is composed of a plurality of positioning blocks and a plurality of workpiece locking devices. The plurality of positioning blocks are installed on the plane of the rotating workbench, and the plurality of positioning blocks are evenly distributed according to the circumference of the two side dimensions of the workpiece; the workpiece locking device includes a locking handwheel, a locking screw, a locking seat, a locking nut and a locking block. The locking seat is installed on the rotating workbench, the locking nut is fixed on the locking seat, the locking screw and the locking nut are threadedly matched, a locking handwheel is installed at one end of the locking screw, and the other end is connected to the locking block. The locking block and the locking seat are connected by a spring to prevent loosening after locking. Rotate the locking handwheel, and the locking screw drives the locking block to press the workpiece, and loosen the workpiece in the opposite direction. When clamping the product, the two sides of the product are used as the reference. The product is placed between the two positioning blocks on the workbench surface and completely fits the positioning blocks, and the rotating locking device is pressed.

[0018] Furthermore, the dust removal device comprises an upper dust removal cover arranged above the tool and a lower dust removal cover arranged below the workpiece, the upper dust removal frame seat plate is installed on the (bed) outer ring frame, the upper dust removal cylinder is installed on the upper dust removal frame seat plate, the upper dust removal connecting rod is installed on the upper dust removal frame seat plate and fixed by the upper dust removal locking bolt; one end of the upper dust removal connecting rod is connected to the upper dust removal cylinder, and the other end is connected to the upper dust removal connecting plate, the upper dust removal connecting plate clamps the upper dust removal cover, and the upper dust removal cover is turned over by the extension and contraction of the upper dust removal cylinder; the upper dust removal cover is controlled by the upper dust removal cylinder Cylinder control, turning the hand-operated valve of the upper dust removal cylinder can make the upper dust removal cover flip over, which is convenient for the disassembly and assembly of the tool and the cutting condition of the product can be observed at any time; when disassembling the tool, open the upper dust removal locking bolt, adjust it to the lower limit hole and lock it, and the upper dust removal cylinder drives the upper dust removal cover to rise and then disassemble and assemble the tool; the lower dust removal cover is installed on the fixed shaft sleeve, and the dust removal port on the lower dust removal cover is opened in the direction of wood chip discharge. The dust removal and chip discharge of the present invention adopt the method of upper and lower suction, and a vacuum is formed in the processing area. Wood chips cannot splash out, which meets the dust removal requirements of the equipment.

[0019] Furthermore, the automatic control system adopts PLC control, and the speed of the rotating table can be controlled by variable frequency speed regulation. The automatic control system includes a control panel and a distribution box. The control panel is fixed above the bed through a control panel rotation axis that can perform multiple rotations, which is convenient for operators of different heights and body shapes to use. The distribution box is fixed under the bed, and the control panel and the distribution box are placed separately to achieve the purpose of facilitating operation and control.

[0020] Process flow of CNC woodworking internal arc milling machine:

[0021] 1. The CNC woodworking internal arc milling machine of the present invention adopts PLC control. When the tool rotation button on the control panel is started, the tool shaft motor is started, and the tool installed on the tool spindle is driven to rotate at high speed through the flat belt. The cutting device can adjust the processing depth through the dovetail upper guide rail.

[0022] 2. After adjusting the processing depth, place the workpiece to be processed between the two positioning blocks on the rotary worktable, manually adjust the workpiece locking device, and fix the workpiece on the rotary worktable.

[0023] 3. Start the workbench rotation button on the control panel, the workbench motor starts, and the guide shaft pinion is driven through the V-belt transmission. The guide shaft pinion meshes with the internal gear of the workbench, so that the rotary workbench rotates at a low speed to realize the product feeding movement. Figure 3-4 Medium size R1 is cut into Figure 5-6 Dimension R. The speed of the rotary table is adjusted according to the cutting quality and the need to clamp the workpiece. The speed of the table can be controlled by PLC frequency conversion speed regulation.

[0024] 4. The CNC woodworking internal arc milling machine of the present invention can realize the function of continuous product processing without stopping. That is, when the workpiece of the first station is processed, the worktable rotates to process the second workpiece, the processed workpiece of the first station is removed and the new workpiece is installed. Similarly, when processing the workpiece of the third station, the workpiece of the second station is removed and installed.

[0025] 5. Dust removal and chip removal adopt the upper and lower suction method. The upper dust removal is controlled by the upper dust removal cylinder. Turning the hand lever valve of the upper dust removal cylinder can make the upper dust cover flip over, which is convenient for the disassembly and assembly of the tool and the cutting status of the product can be observed at any time. The lower dust removal method is to install the lower dust cover under the workpiece and set the dust removal port in the direction of the wood chip discharge, so that the upper and lower dust can be removed together to meet the dust removal requirements of the equipment.

[0026] 6. In order to facilitate operation and improve processing efficiency, the control panel is designed with 360-degree rotation without dead angles at 3 locations.

[0027] The CNC woodworking internal arc milling machine of the present invention mainly adopts a tool spindle that is vertically installed and parallel to the Z axis, and the cutting device is installed inside the rotary worktable. The length of the tool is greater than the height H of the product, and the product processing can be completed by one cutting. The product is fixed on the circular rotary worktable in a mechanical clamping manner. The axis of the tool shaft is parallel to the axis of the main shaft of the rotary worktable. Multiple products can be placed on the rotary worktable at the same time. The multiple products are evenly distributed according to the center. The center of the rotary worktable coincides with the center of the inner and outer arc surfaces of the product. The material rotates at a uniform speed on the worktable to realize the material feeding. The tool is placed on the inner side of the material for rotational cutting to realize the material processing. The equipment cutting processing area is set opposite to the operation area, which is convenient for clamping and disassembly of other products while the product is being processed.

[0028] In summary, the present invention is a special equipment for processing the inner arc surface of the corner products of the wall of wooden structure products. The whole equipment system adopts PLC control. It has the advantages of high efficiency, energy saving, environmental protection, stable quality and small production operation area. At the same time, the equipment itself has low cost, convenient operation, stability and reliability. The uninterrupted processing of products is more suitable for mass and standardized production of products, which greatly reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the wall lap joint method of traditional wooden structure buildings;

[0030] Figure 2 It is the standard angle connection method for existing wooden structure buildings;

[0031] Figure 3 A top view of the product to be processed;

[0032] Figure 4 It is a rear view of the product to be processed;

[0033] Figure 5 A top view of the finished product;

[0034] Figure 6 The figure is the rear view of the finished product;

[0035] Figure 7 This is the front view of the CNC woodworking inner arc surface cutting device;

[0036] Figure 8 for Figure 7 AA section view;

[0037] Fig. 9 This is the main view of the CNC woodworking internal arc milling machine;

[0038] Fig.10 This is a top view of a CNC woodworking internal arc milling machine;

[0039] Fig.11 This is a three-dimensional view of a CNC woodworking internal arc milling machine. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with embodiments: Example 1

[0041] This embodiment discloses a CNC woodworking internal arc surface milling machine, such as Figure 7-11 As shown, it includes a cutting device, a feeding device, a positioning device, a dust removal device, a rotating worktable 32, a bed and an automatic control system.

[0042] A rotating worktable 32 is horizontally arranged above the bed; the lower part of the cutting device is arranged on the lower side of the bed, and the upper part is inserted into the rotating worktable 32; the feeding device is arranged under the bed, and is used to drive the cutting device and the rotating worktable 32; the positioning device is arranged on the rotating worktable 32, and the dust removal device is arranged above the cutting device (tool 4) and below the workpiece to be cut; the automatic control system is electrically connected to the feeding device (tool shaft motor 49 and worktable motor 22).

[0043] A base frame 51 is provided at the bottom of the bed, and a dovetail lower guide rail 57 is fixed on the base frame 51, and a dovetail upper guide rail 56 is matched on the dovetail lower guide rail 57, and a motor seat 55 is fixed above the dovetail upper guide rail 56; the feeding device (tool shaft motor 49) is installed on the motor seat 55 through the motor plate 46; the motor seat adjustment block 48 is installed on the motor seat 55, and the adjusting bolt 47 is installed on the motor seat adjustment block 48, and the other end is threadedly connected with the motor plate 46, and the position of the motor plate 46 is adjusted by the adjusting bolt 47 on the motor seat adjustment block 48, so as to drive the tool shaft motor 49 to move left and right, and the tool shaft motor flat belt pulley 52 is installed on the tool shaft motor 49, and the tool shaft motor flat belt pulley 52 moves left and right with the tool shaft motor 49, so as to realize the tensioning of the flat belt; the cutting device (fixed shaft sleeve 9) is installed on the motor seat 55, and the dovetail guide adjustment screw 58 is rotated to make the dovetail upper guide rail 56 slide left and right, so as to realize the left and right position adjustment of the fixed shaft sleeve 9, and the specific position is adjusted according to the inner arc size of the workpiece. The tool spindle 1 of the cutting device is perpendicular to the dovetail upper guide rail 56 and the surface of the rotary table 32 .

[0044] The feeding device includes a tool shaft motor 49, and a tool shaft motor flat belt pulley 52 is provided at the output end of the tool shaft motor 49. The tool shaft motor flat belt pulley 52 adopts an arc structure, which makes it easier to tighten the flat belt, prevent the flat belt from falling off when it is loose, and prevent the flat belt from axial movement, thereby extending the service life of the flat belt. The tool shaft motor 49 transmits torque to the cutting device (flat belt pulley 12) through the tool shaft motor flat belt pulley 52 and the flat belt.

[0045] The feeding device also includes a workbench motor 22 (cycloidal pinwheel reducer), which is mounted on a motor base plate 54, which is fixed to the base frame 51 with bolts. The motor base plate 54 is milled with long holes, and the position of the motor base plate 54 can be adjusted left and right by loosening the bolts, thereby driving the workbench motor 22 to move left and right. The workbench motor pulley 25 is mounted on the workbench motor 22, and the left and right movement of the workbench motor 22 drives the workbench motor pulley 25 to move left and right, thereby realizing the tensioning transmission V-belt. After the workbench motor 22 is started, the workbench motor pulley 25 rotates, and drives the guide shaft pulley 23 to rotate through the V-belt. The guide shaft pulley 23 is installed on the guide shaft 24. The guide shaft is fixed on the guide shaft seat 27 through the guide shaft bearing 26. The guide shaft seat 27 is installed on the base frame 51. The guide shaft pinion 28 is installed on the other end of the guide shaft. The guide shaft pinion 28 is meshed with the internal gear 33 of the rotating workbench 32. The workbench motor 22 transmits torque to drive the rotating workbench 32 to rotate at a low uniform speed. The workbench speed can be adjusted by using a frequency converter to ensure the surface processing quality and reasonable process time configuration.

[0046] The rotating workbench 32 includes an inner gear 33 of the workbench, a turntable nylon sleeve 31, an outer ring 30, a nylon sleeve slider 29, and an outer protective sleeve 45. The inner gear 33 of the workbench is installed on the rotating workbench, the outer ring 30 is installed on the outer ring frame 50, and the outer ring frame 50 is installed on the base frame 51. The height can be fine-tuned by adjusting the screw 59. After the final assembly is completed, the parallelism of the workbench with the ground plane is adjusted. The nylon sleeve slider 29 is installed in the outer ring 30, and the nylon sleeve slider 29 is connected to the outer circular wall of the workbench with screws to prevent the workbench from moving up and down during work and ensure the processing accuracy; the outer protective sleeve 45 is installed on the outer circle of the rotating workbench 32 to prevent the exposed screws of the workbench from scratching the workers when the workbench rotates.

[0047] The cutting device includes a tool spindle 1, a tool 4, a movable sleeve 8, a fixed sleeve 9 and a flat pulley 12. One end of the tool spindle 1 is coaxially rigidly connected to the flat pulley 12, and the other end is sleeved with the tool 4. The flat pulley 12 can drive the tool 4 fixed on the tool spindle to perform a rotary cutting motion. The axial section edge size of the tool 4 is the same as the cross-sectional size of the workpiece being processed; the end of the tool spindle 1 on which the tool 4 is sleeved is threadedly connected to the tool locking nut 2, and a tool gasket 3 is arranged between the tool locking nut 2 and the tool 4.

[0048] The tool spindle 1 is installed in the movable sleeve 8 through the bearing 7. The bearing cover 6 and the sealing ring 5 adopt an axial labyrinth seal to prevent wood chips and dust from entering the bearing; the outer diameter of the movable sleeve 8 and the inner diameter of the fixed sleeve 9 adopt a clearance fit, and the first locking bolts 21 are installed at the upper and lower ends of the fixed sleeve 9. After the first locking bolts are tightened, the movable sleeve 8 is fixed to the fixed sleeve 9; the end of the movable sleeve 8 close to the flat pulley 12 is fixed with a bearing end cover 11, and the retaining ring 10 is installed between the tool spindle 1 bearing and the flat pulley 12, which plays the role of positioning the pulley and dust prevention; the gasket 13 is installed at the end of the tool spindle 1 and is tightened by the locking bolts 14 and The flat key fixes the flat pulley 12; the bearing end cover 11 is fixed with an adjusting nut 17, the fixed sleeve 9 is fixed with an adjusting bracket 18, one end of the adjusting screw 15 is installed on the adjusting bracket 18 through the pressure bearing 19 and the first locking nut 20, and the other end is threadedly matched with the adjusting nut 17, and the locking nut 16 is installed on the adjusting screw 15. After locking, the adjusting screw 15 is fixed; after loosening, the adjusting screw 15 is rotated, and the bearing end cover 11 is driven to move left and right through the adjusting nut 17, thereby changing the position of the moving sleeve 8 and the fixed sleeve 9 in the axial direction, and the first locking bolt 21 is loosened before adjustment, and the first locking bolt 21 is locked after adjustment. The moving sleeve 8 drives the tool 4 to move along the axial direction, and adjusts the inner arc size of the workpiece cut by the tool, thereby changing the arc radius of the workpiece.

[0049] The rotation direction of the tool spindle 1 is opposite to that of the rotary table 32 , and the tool spindle 1 drives the tool 4 fixed thereon to perform a rotary cutting motion.

[0050] The positioning device is composed of a plurality of positioning blocks 62 and a plurality of workpiece locking devices. The plurality of positioning blocks 62 are installed on the plane of the rotating worktable 32, and the plurality of positioning blocks 62 are evenly distributed according to the circumference of the two sides of the workpiece; the workpiece locking device includes a locking handwheel 44, a locking screw 40, a locking seat 43, a locking nut 42 and a locking block 41. The locking seat 43 is installed on the rotating worktable 32, the locking nut 42 is fixed on the locking seat 43, the locking screw 40 and the locking nut 42 are threadedly matched, the locking handwheel 44 is installed at one end of the locking screw 40, and the locking block 41 is connected at the other end. The locking block 41 and the locking seat 43 are connected by a spring to prevent loosening after locking. Rotate the locking handwheel 44, the locking screw 40 drives the locking block 41 to press the workpiece, and loosen the workpiece in the opposite direction. When the product is clamped, the two sides of the product are used as the reference, the product is placed between the two positioning blocks on the worktable and completely fits the positioning blocks, and the rotating locking device is pressed.

[0051] The dust removal device is an upper dust removal cover 39 arranged above the tool 4 and a lower dust removal cover 63 arranged below the workpiece. The upper dust removal frame seat plate 34 is installed on the (bed) outer ring frame 50, the upper dust removal cylinder 35 is installed on the upper dust removal frame seat plate 34, and the upper dust removal connecting rod 37 is installed on the upper dust removal frame seat plate 34 and fixed by the upper dust removal locking bolt 36; one end of the upper dust removal connecting rod 37 is connected to the upper dust removal cylinder 35, and the other end is connected to the upper dust removal connecting plate 38, the upper dust removal connecting plate 38 clamps the upper dust removal cover 39, and the upper dust removal cover 39 is turned over by the extension and contraction of the upper dust removal cylinder 35; the upper dust removal cover 39 is controlled by the upper dust removal cylinder 35. By turning the hand valve of the upper dust removal cylinder, the upper dust removal cover 39 can be flipped to facilitate the disassembly and assembly of the tool and to observe the cutting condition of the product at any time. When disassembling the tool 4, the upper dust removal locking bolt 36 is opened and adjusted to the lower limit hole for locking. The upper dust removal cylinder 35 drives the upper dust removal cover 39 to rise and then disassemble and assemble the tool 4. The lower dust removal cover 63 is installed on the fixed shaft sleeve 9, and the dust removal port on the lower dust removal cover 63 is opened in the direction of wood chip discharge. The dust removal and chip discharge of the present invention adopt the method of upper and lower suction, and a vacuum is formed in the processing area. Wood chips cannot splash out, which meets the dust removal requirements of the equipment.

[0052] The automatic control system adopts a PLC control system, and the speed of the rotating table 32 can be controlled by variable frequency speed regulation. The automatic control system includes a control panel 61 and a distribution box 53. The control panel 61 is fixed above the bed through a control panel rotation shaft 64 that can perform multiple rotations, which is convenient for operators of different heights and body shapes to use. The distribution box 53 is fixed below the bed. The control panel 61 and the distribution box 53 are placed separately to facilitate operation and control.

[0053] Process flow of CNC woodworking internal arc milling machine:

[0054] 1. The CNC woodworking internal arc milling machine of the present invention adopts PLC control. The tool rotation button on the control panel 61 is started, and the tool shaft motor 49 is started. The tool 4 installed on the tool spindle 1 is driven to rotate at high speed through the flat belt. The cutting device can adjust the processing depth through the dovetail upper guide rail 56.

[0055] 2. After adjusting the processing depth, place the workpiece 60 to be processed between the two positioning blocks 62 on the rotating worktable 32 , and manually adjust the workpiece locking device to fix the workpiece 60 on the rotating worktable 32 .

[0056] 3. Start the workbench rotation button on the control panel 61, the workbench motor 22 starts, and drives the guide shaft pinion 28 through the V-belt transmission. The guide shaft pinion 28 meshes with the workbench internal gear 33, so that the rotary workbench rotates at a low speed to realize the product feeding movement. Figure 3-4 Medium size R1 is cut into Figure 5-6 Dimension R. The speed of the rotary table 32 is adjusted according to the cutting quality and the need to clamp the workpiece, and the speed of the table can be controlled by PLC frequency conversion speed regulation.

[0057] 4. The CNC woodworking internal arc milling machine of the present invention can realize the function of continuous product processing without stopping. That is, when the workpiece of the first station is processed, the rotary table 32 rotates to process the second workpiece, the processed workpiece of the first station is removed and the new workpiece is installed. Similarly, when processing the workpiece of the third station, the workpiece of the second station is removed and installed.

[0058] 5. Dust removal and chip removal adopt the upper and lower suction method. The upper dust removal is controlled by the upper dust removal cylinder 35. Turning the upper dust removal cylinder hand lever valve can make the upper dust removal cover 39 flip the angle, which is convenient for the disassembly and assembly of the tool and the cutting status of the product can be observed at any time. The lower dust removal method is to install the lower dust removal cover 63 under the workpiece and set the dust removal port in the direction of the wood chip discharge, so as to achieve the upper and lower dust removal together, meeting the dust removal requirements of the equipment.

[0059] 6. In order to facilitate operation and improve processing efficiency, the control panel 61 is designed with 360-degree rotation without dead angles at three locations.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A CNC woodworking internal arc milling machine, characterized in that: It includes a cutting device, a feeding device, a positioning device, a dust removal device, a rotary table (32), a bed and an automatic control system; A rotating table (32) is horizontally arranged above the bed; the lower part of the cutting device is arranged at the lower side of the bed, and the upper part is inserted into the rotating table (32); the feeding device is arranged below the bed, and is used to drive the cutting device and the rotating table (32); the positioning device is arranged on the rotating table (32), and the dust removal device is arranged above the cutting device and below the workpiece to be cut; the automatic control system is electrically connected to the feeding device; The positioning device is composed of a plurality of positioning blocks (62) and a plurality of workpiece locking devices. The plurality of positioning blocks (62) are mounted on a plane of a rotating worktable (32). The plurality of positioning blocks (62) are evenly distributed on the circumference of two side edges of the workpiece. The workpiece locking device comprises a locking handwheel (44), a locking screw (40), a locking seat (43), a locking nut (42) and a locking block (41). The locking seat (43) is mounted on the rotating worktable (32). The locking nut (42) is fixed on the locking seat (43). The locking screw (40) and the locking nut (42) are threadedly matched. A locking handwheel (44) is mounted on one end of the locking screw (40), and the other end is connected to the locking block (41). The locking block (41) and the locking seat (43) are connected by a spring. The dust removal device comprises an upper dust removal cover (39) arranged above the tool (4) and a lower dust removal cover (63) arranged below the workpiece. The upper dust removal frame base plate (34) is mounted on the outer ring frame (50), the upper dust removal cylinder (35) is mounted on the upper dust removal frame base plate (34), and the upper dust removal connecting rod (37) is mounted on the upper dust removal frame base plate (34) and fixed by an upper dust removal locking bolt (36); one end of the upper dust removal connecting rod (37) is connected to the upper dust removal cylinder (35) and the other end is connected to the upper dust removal connecting plate (38); the upper dust removal connecting plate (38) clamps the upper dust removal cover (39) and drives the upper dust removal cover (39) to flip through the extension and contraction of the upper dust removal cylinder (35); the upper dust removal cover (39) is controlled by the upper dust removal cylinder (35); the lower dust removal cover (63) is mounted on the fixed shaft sleeve (9), and the dust removal port on the lower dust removal cover (63) is opened in the direction of wood chip discharge.

2. The CNC woodworking internal arc milling machine according to claim 1, characterized in that: The bottom of the bed is provided with a base frame (51), a dovetail lower guide rail (57) is fixed on the base frame (51), the dovetail lower guide rail (57) cooperates with the dovetail upper guide rail (56), and a motor seat (55) is fixed above the dovetail upper guide rail (56); the feeding device is mounted on the motor seat (55) through the motor plate (46); the motor seat adjustment block (48) is mounted on the motor seat adjustment block (48), the other end of the adjustment bolt (47) is screwed to the motor plate (46) The motor plate (46) is connected with the motor seat by a threaded connection, and the position of the motor plate (46) is adjusted by an adjusting bolt (47) on the motor seat adjusting block (48), so as to drive the tool shaft motor (49) to move left and right. The tool shaft motor flat belt pulley (52) is installed on the tool shaft motor (49), and the tool shaft motor flat belt pulley (52) moves left and right with the tool shaft motor (49); the cutting device is installed on the motor seat (55), and the dovetail guide rail adjustment screw (58) is rotated to make the dovetail upper guide rail (56) slide left and right, so as to realize the left and right position adjustment of the fixed shaft sleeve (9).

3. The CNC woodworking internal arc milling machine according to claim 1, characterized in that: The feeding device comprises a tool shaft motor (49), an output end of the tool shaft motor (49) is provided with a tool shaft motor flat belt pulley (52), and the tool shaft motor flat belt pulley (52) has an arc-shaped structure; The feeding device further comprises a workbench motor (22), the workbench motor (22) being mounted on a motor base plate (54), the motor base plate (54) being fixed to the base frame (51) by bolts, the motor base plate (54) being provided with a long hole milled thereon, and the position of the motor base plate (54) can be adjusted leftward and rightward by loosening the bolts, thereby driving the workbench motor (22) to move leftward and rightward, the workbench motor pulley (25) being mounted on the workbench motor (22), and the workbench motor (22) moving leftward and rightward drives the workbench motor The pulley (25) moves left and right; after the workbench motor (22) is started, the workbench motor pulley (25) rotates, and drives the guide shaft pulley (23) to rotate through the V-belt, the guide shaft pulley (23) is installed on the guide shaft (24), the guide shaft is fixed on the guide shaft seat (27) through the guide shaft bearing (26), the guide shaft seat (27) is installed on the base frame (51), and the other end of the guide shaft is installed with a guide shaft pinion (28), and the guide shaft pinion (28) is meshed with the internal gear (33) of the rotary workbench.

4. The CNC woodworking internal arc milling machine according to claim 1, characterized in that: The rotary table (32) comprises a table inner gear (33), a rotary table nylon sleeve (31), an outer ring (30), a nylon sleeve slider (29), and an outer protective sleeve (45). The table inner gear (33) is mounted on the rotary table (32), the outer ring (30) is mounted on an outer ring frame (50), the outer ring frame (50) is mounted on a base frame (51), and the height can be fine-tuned by adjusting screws (59). The nylon sleeve slider (29) is mounted in the outer ring (30), and the nylon sleeve slider (29) is connected to the outer circular wall of the table by screws; the outer protective sleeve (45) is mounted on the outer circle of the rotary table (32).

5. The CNC woodworking internal arc milling machine according to claim 1, characterized in that: The cutting device comprises a tool spindle (1), a tool (4), a movable shaft sleeve (8), a fixed shaft sleeve (9) and a flat belt pulley (12); one end of the tool spindle (1) is coaxially rigidly connected to the flat belt pulley (12), and the other end is sleeved with the tool (4); the flat belt pulley (12) can drive the tool (4) fixed on the tool spindle to perform a rotary cutting motion; the axial section edge size of the tool (4) is the same as the cross-sectional size of the workpiece being processed; the end of the tool spindle (1) sleeved with the tool (4) is threadedly connected to the tool locking nut (2), and a tool gasket (3) is provided between the tool locking nut (2) and the tool (4); The tool spindle (1) is mounted in a movable sleeve (8) through a bearing (7); the bearing cover (6) and the sealing ring (5) adopt an axial labyrinth seal; the outer diameter of the movable sleeve (8) and the inner diameter of the fixed sleeve (9) adopt a clearance fit; the upper and lower ends of the fixed sleeve (9) are mounted with first locking bolts (21); after the first locking bolts are tightened, the movable sleeve (8) is fixed to the fixed sleeve (9); a bearing end cover (11) is fixed to one end of the movable sleeve (8) close to the flat pulley (12); and a retaining ring (10) is mounted on the tool spindle (1). The bearing is provided between the bearing and the flat pulley (12); the washer (13) is installed at the end of the tool spindle (1) and the flat pulley (12) is fixed by a locking bolt (14) and a flat key; an adjusting nut (17) is fixed on the bearing end cover (11); an adjusting bracket (18) is fixedly installed on the fixed sleeve (9); one end of the adjusting screw (15) is installed on the adjusting bracket (18) through a pressure bearing (19) and a first locking nut (20); the other end is threadedly matched with the adjusting nut (17); and the locking nut (16) is installed on the adjusting screw (15).

6. The CNC woodworking internal arc milling machine according to claim 5, characterized in that: The rotation direction of the tool spindle (1) is opposite to the rotation direction of the rotary table (32), and the tool spindle (1) drives the tool (4) fixed thereon to perform rotary cutting motion.

7. The CNC woodworking internal arc milling machine according to claim 1, characterized in that: The automatic control system comprises a control panel (61) and a distribution box (53); the control panel (61) is fixed above the bed via a control panel rotation shaft (64) capable of multiple rotations; the distribution box (53) is fixed below the bed; the control panel (61) and the distribution box (53) are placed separately.

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