A multi-axis machining system

Abstract

This invention provides a multi-axis machining system, comprising a machine tool and an air-blowing chip removal device. The machine tool includes a worktable for fixing parts and a spindle for machining parts on the worktable. The air-blowing chip removal device is connected to an air source, with its outlet facing the worktable and capable of cleaning debris from the worktable and the parts. This multi-axis machining system is compact, small in size, and capable of machining complex curved surfaces. It also achieves automatic chip removal with excellent cleaning effect, ensuring fully automated loading, unloading, and machining.

Description

Technical Field

[0001] This invention relates to a machining equipment, and more particularly to a multi-axis machining system. Background Technology

[0002] A machine tool is a device that can cut and machine a workpiece into a desired shape. Among machine tools that perform cutting operations, there are turning centers that machine workpieces by having a cutting tool contact a rotating workpiece, machining centers that machine workpieces by having a rotating tool contact a workpiece, and multi-functional machining centers that combine these functions. During machining, the cutting tool is fixed in a tool holder such as a spindle or tool post, and the machine tool changes tools and machines the workpiece while moving the tool holder according to a pre-prepared machining program.

[0003] In existing machining systems, the worktable is usually horizontal, allowing only forward and backward and left and right movements, which limits the types of machining. To overcome this problem, existing technologies increase the spindle's degree of freedom, enabling it to rotate. However, since the spindle has a certain length, its rotation requires a large space, thus increasing the machine tool's size, structural complexity, and manufacturing costs. Furthermore, traditional machining centers require manual cleaning of debris from the platform after machining and before clamping, which is time-consuming and labor-intensive. This fails to meet the requirements of fully automated machining and intelligent manufacturing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-axis machining system that can achieve dual-axis rotation of the worktable, complete complex machining processes, and achieve 360-degree chip removal without dead angles.

[0005] This invention provides a multi-axis machining system, comprising:

[0006] Machine tool 1, wherein the machine tool 1 is provided with a worktable for fixing parts and a spindle for machining parts on the worktable;

[0007] An air-blowing chip removal device is connected to an air source, with its air outlet facing the worktable and capable of cleaning debris from the worktable and parts.

[0008] Furthermore, the workbench includes a base 21, a support 22 is rotatably mounted at the end of the base 21, the rotation axis of the support 22 is parallel to the horizontal plane, a support base 23 is fixed at the end of the support 22, a circular workbench body 24 is rotatably mounted on the support base, the rotation axis of the workbench body 24 is perpendicular to the rotation axis of the support 22, the side wall of the support 22 is provided with an arc-shaped surface facing the workbench body 24, the axis of the arc-shaped surface is parallel to the rotation axis of the workbench body, and the air blowing chip removal device is mounted on the arc-shaped surface.

[0009] Furthermore, the air blowing chip removal device includes multiple strip-shaped air boxes 4 arranged in an arc around the axis of the workbench surface and set at equal angles. Each strip-shaped air box 4 is provided with a partition 41 that divides the strip-shaped air box 4 into at least three air chambers 40. The front end face of each air chamber 40 is provided with parallel strip-shaped air jet holes 400. The left and right directions of the air jet holes located on the same strip-shaped air box are different.

[0010] Furthermore, the included angle between the two strip-shaped air boxes located at the ends is 10°-20°.

[0011] Furthermore, the edge of the jet hole is bent forward to form a guide vane 42. The two guide vanes on the same jet hole are parallel to each other and form a guide area. The ratio of the width of the guide area to the width of the air cavity 40 is greater than or equal to 1 / 8 and less than or equal to 1 / 5. The bending angle α of the guide vane located at the end of the strip-shaped air box is greater than or equal to 70 degrees and less than or equal to 80 degrees. The bending angle of the guide vanes on two adjacent jet holes increases or decreases in the same direction in increments Δα.

[0012] Furthermore,

[0013] Where k is a constant, and 120≤k≤180, γ is the angle between the two strip-shaped air boxes at the end, n is the number of air chambers on a single strip-shaped air box, b is the distance between two adjacent jet holes, D is the diameter of the workbench surface, and N is the number of strip-shaped air boxes.

[0014] Furthermore, the width of the guide zone is 0.5mm-1mm.

[0015] Furthermore, the inner wall of the air cavity is connected to the guide zone by a slope transition, and an arc-shaped air guide surface is provided between the top surface of the air cavity and its rear inner wall.

[0016] Furthermore, the rear end of the strip-shaped air box is provided with a connecting chamber 43, which is provided with the same number of connecting chambers as the air chambers and is connected to each other. The side wall of the connecting chamber is provided with a connecting hole 44 for connecting to an air source.

[0017] Furthermore, the strip-shaped air box 4 is inclined downwards to the working surface of the workbench, and the included angle β between the two is greater than or equal to 5 degrees and less than or equal to 15 degrees.

[0018] Furthermore, a rectangular mounting cavity 220 is formed on the side wall of the support base 22. A main housing 31 is provided in the mounting cavity. The main housing 31 has a cavity with an open rear end. The front end face of the main housing 31 is arc-shaped and flush with the side wall of the support base 22. The front edge of the main housing extends outward and forms a connecting flange. The front end face of the main housing 31 has a strip-shaped hole 312 at equal angles that connects to the cavity. A secondary housing 32 is installed in the mounting cavity. The front end face of the secondary housing 32 is arc-shaped and serves as a mounting surface. The mounting surface is coaxial with the front end face of the main housing 31. A strip-shaped mounting groove corresponding to the strip-shaped hole 312 is formed on the working surface. The strip-shaped air box 4 is detachably installed in the strip-shaped mounting groove.

[0019] Furthermore, the strip-shaped air box 4 is connected to a pneumatic reversing valve, which enables the jet holes on the same strip-shaped air box to jet in an alternating manner.

[0020] Furthermore, the pneumatic reversing valve includes a valve body 51, within which a buffer chamber 512 and a circular impeller chamber 50 are formed. An impeller 6 is rotatably mounted within the impeller chamber 50. The sidewall of the valve body 51 has an air inlet 510 that communicates with the impeller chamber 50 and drives the impeller 6 to rotate. The sidewall of the impeller chamber 50 has a connecting air hole 511 that communicates with the buffer chamber and has a cross-sectional area larger than the air inlet. The bottom surface of the impeller chamber has valve core holes 502 evenly distributed circumferentially, the same number as the number of air chambers on a single strip-shaped air box. The sidewall of the valve core hole 502 has a first air passage 514a communicating with the buffer chamber 512 and a passage communicating with the sidewall of the valve body 1. The first air passage 514a and the second air passage 514b of the air outlet 514 are located on different radial planes; a valve core 82 is rotatably installed in the valve core hole, and the side wall of the valve core 82 is inclinedly provided with a valve hole 820 for connecting the first air passage 514a and the second air passage 514b. The connection angle of the valve core is (360° / n)+α, and the installation phase difference between adjacent valve cores is 360° / n, where n is the number of valve core holes, 3°≤α≤5°; a gear 81 is fixed on the top of the valve core, and a gear ring 62 is provided on the bottom surface of the impeller 6 to mesh with the gear 81 and drive the valve core to rotate synchronously.

[0021] Furthermore, the valve core includes a valve core body with the same diameter as the valve core hole. An upper shaft 821 and a lower shaft 822 are respectively provided at both ends of the valve core body. The valve hole is opened on the valve core body, and sealing rings are provided at both ends of the valve hole. A lower guide sleeve 74, which accommodates the lower shaft, and an upper guide sleeve 73, which accommodates the upper shaft, are provided inside the valve core hole. The upper end of the upper guide sleeve extends radially outward to form a support portion. The open end of the valve core hole has a recessed hole that accommodates the support portion. A spline hole is opened at the end of the upper shaft. A spline is provided on the gear. The spline is fitted into the spline hole and radially fixed. A bolt passes through the gear and the spline sequentially from top to bottom and is connected to the valve core.

[0022] Furthermore, the bottom surface of the impeller 6 is concave to form a circular groove 60, and the gear ring 62 is disposed in the circular groove.

[0023] The advantages of this invention are as follows: The multi-axis machining system of this invention adopts a dual-axis rotating worktable, which can achieve arbitrary angle adjustment of parts and realize the machining and forming of complex curved surfaces. It has a small installation space, low cost, and is easy to control. An air-blowing chip removal device is set up to clean debris from the worktable and the parts on it. Combined with the rotating worktable, it can achieve all-round, dead-angle-free chip removal with high cleaning efficiency and good effect, facilitating fully automatic loading, processing, and unloading. The main and auxiliary housing structure facilitates processing and assembly, reduces manufacturing costs, and is easy to maintain and repair. The air-blowing chip removal device adopts a split structure, which is easy and inexpensive to manufacture, can be added later, and has high flexibility in use. The staggered interconnected structure can improve the airflow impact force and enhance the cleaning effect. The diversion zone adopts different orientations, increasing the coverage area while reducing the number of air boxes, thus achieving… This invention features comprehensive cleaning, excellent cleaning effect, and low cost. A baffle structure guides airflow, preventing internal gas impact and vibration, resulting in good performance and low noise. A pneumatic reversing valve structure enables automatic pneumatic reversal, achieving single-input multi-output with good output sequence. A buffer chamber structure improves valve reliability, reduces wind noise, and facilitates manufacturing. A rotating valve core design achieves force balance, ensuring overall stability, vibration-free operation, and noise reduction. A compensation angle increases the valve core connection angle, ensuring at least one connection in any valve state, preventing jamming and guaranteeing operational reliability and stability. This multi-axis machining system is compact and small in size, capable of machining complex curved surfaces and automatically removing chips, providing a guarantee for fully automated loading, unloading, and processing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the multi-axis machining system of the present invention;

[0025] Figure 2This is a schematic diagram of the worktable structure of the multi-axis machining system of the present invention;

[0026] Figure 3 This is a cross-sectional view of the worktable of the multi-axis machining system of the present invention;

[0027] Figure 4 This is a schematic diagram of the support base of the multi-axis machining system of the present invention;

[0028] Figure 5 This is a schematic diagram of the chip removal device of the multi-axis machining system of the present invention;

[0029] Figure 6 This is a schematic diagram of the chip removal device of the multi-axis machining system of the present invention from another angle;

[0030] Figure 7 This is a schematic diagram of the installation of the strip-shaped air box in the multi-axis machining system of the present invention;

[0031] Figure 8 This is a schematic diagram of the main housing of the multi-axis machining system of the present invention;

[0032] Figure 9 This is a schematic diagram showing the position between the strip-shaped air box and the worktable in the multi-axis machining system of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the strip-shaped air box in the multi-axis machining system of the present invention;

[0034] Figure 11 This is a schematic diagram of the strip-shaped air box of the multi-axis machining system of the present invention from another angle;

[0035] Figure 12 This is a partial sectional view of the strip-shaped air box of the multi-axis machining system of the present invention;

[0036] Figure 13 This is a cross-sectional view of the strip-shaped air box of the multi-axis machining system of the present invention;

[0037] Figure 14 This is a schematic diagram showing the distribution of the guide zone of the strip-shaped air box in the multi-axis machining system of the present invention;

[0038] Figure 15 This is a schematic diagram of the pneumatic directional valve of the multi-axis machining system of the present invention;

[0039] Figure 16 This is an exploded structural diagram of the pneumatic directional valve of the multi-axis machining system of the present invention;

[0040] Figure 17 This is a cross-sectional view of the pneumatic directional valve of the multi-axis machining system of the present invention;

[0041] Figure 18 This is another cross-sectional view of the pneumatic directional valve of the multi-axis machining system of the present invention;

[0042] Figure 19 This is a longitudinal sectional view of the pneumatic directional valve of the multi-axis machining system of the present invention;

[0043] Figure 20 for Figure 19 Enlarged view of section A in the middle;

[0044] Figure 21 This is a schematic diagram of the impeller structure of the multi-axis machining system of the present invention;

[0045] Figure 22 This is a cross-sectional view of the valve body of the multi-axis machining system of the present invention;

[0046] Figure 23 This is a schematic diagram of the valve core of the multi-axis machining system of the present invention. Detailed Implementation

[0047] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] See Figures 1-23 The present invention provides a multi-axis machining system, which includes a machine tool 1 and an air blowing chip removal device.

[0049] See Figures 1-4 The machine tool 1 includes a rectangular shell structure, inside which is a worktable and a spindle. The worktable is used to clamp and fix parts, and the spindle is equipped with cutting tools for machining the parts on the worktable. In this application, the worktable can achieve dual-axis rotation, and the spindle can achieve three-axis movement, that is, it can move forward and backward, left and right, and up and down. Through the rotation of the worktable and the movement of the spindle, the machining of complex curved surfaces of the parts can be realized. A sliding door 11 is provided at the front end of the shell, and a transparent observation window is provided on the sliding door. A material inlet 10 is opened at the top of the shell, which is located directly above the worktable, for realizing automatic loading and unloading of the robot arm, improving the degree of automation, and realizing fully automated production processing.

[0050] The air-blowing chip removal device is connected to an air source, with its air outlet facing the worktable. It can clean the chips on the worktable and parts. In conjunction with the dual-axis rotation of the worktable, it can achieve 360-degree all-round cleaning of chips on the worktable and parts without dead angles, ensuring the clamping accuracy of the blank and the cleanliness of the parts. It also prevents chips and coolant from falling outside the machine tool during automatic material transfer, thus affecting the working environment.

[0051] In this application, the worktable includes a base 21, with a support 22 rotatably mounted at either the left or right end of the base 21. The axis of rotation of the support 22 is parallel to a horizontal plane. A first driving device 27, which is a servo motor, is provided inside the base 21 to drive the support 22 to rotate. A support base 23, which is semi-circular, is fixed at the end of the support 22. In its initial state, the top surface of the support base 23 is a plane, on which a circular worktable body 24 is rotatably mounted. The axis of rotation of the worktable body 24 is perpendicular to the axis of rotation of the support 22. The support 22 and the support base 23 form an L-shaped structure. A second driving device 28, which drives the worktable body, is provided inside the support base 23. The second drive device is a servo motor. In the initial state, the working surface (clamping surface) of the worktable body is parallel to the horizontal plane for clamping. The side wall of the support base 22 is provided with an arc-shaped surface facing the worktable body 24. The axis of the arc-shaped surface is parallel to the rotation axis of the worktable body. The air blowing chip removal device is installed on the arc-shaped surface. With the 360-degree rotation of the worktable body 24, the air blowing chip removal device can blow air all-round (360 degrees) without dead angles on the worktable and the parts on the worktable, and clean the debris and coolant on the worktable surface and the parts, improving the cleanliness of the worktable and the parts. At the same time, in conjunction with the rotation of the support base, the worktable surface is tilted or inverted, causing the debris or coolant to fall off under the action of gravity, further improving the cleaning effect.

[0052] See Figures 5-14 The air blowing chip removal device includes a strip-shaped air box 4, which is strip-shaped in general. There are multiple strip-shaped air boxes 4, which are arranged in an arc around the axis of the workbench surface. The strip-shaped air boxes are arranged at equal angles. The included angle between two strip-shaped air boxes located at the ends (head and tail ends) is 10°-20°. There are 7-10 such strip-shaped air boxes, and the included angle between each pair is the same. There are multiple vertical partitions 41 inside the strip-shaped air box 4, which are parallel to each other. They divide the strip-shaped air box 4 into at least three parallel air chambers 40. Parallel strip-shaped air jet holes 400 are opened on the front end face of the air chamber 40. The left and right directions of the air jet holes located on the same strip-shaped air box are different.

[0053] See Figures 13-14 The edge of the jet hole is bent forward to form a guide vane 42. Two guide vanes on the same jet hole are parallel to each other to form a guide zone for guiding air. The ratio of the width of the guide zone to the width of the air chamber 40 is greater than or equal to 1 / 8 and less than or equal to 1 / 5, and the width is 0.5mm-1mm. The bending angle α of the guide vane located at the end of the strip-shaped air box (left outer or innermost side) is greater than or equal to 70 degrees and less than or equal to 80 degrees. The bending angle of the guide vanes on two adjacent jet holes increases or decreases in the same direction with an increment Δα. That is, the angle difference between the guide vanes on two adjacent guide zones is Δα.

[0054] The above

[0055] Where k is a constant, and 120≤k≤180, γ is the angle between the two strip-shaped air boxes at the end, n is the number of air chambers on a single strip-shaped air box, b is the distance between two adjacent jet holes, D is the diameter of the workbench surface, and N is the number of strip-shaped air boxes.

[0056] The following describes the preferred embodiments of this application:

[0057] See Figure 13 and Figure 14 There are three partitions 41, which divide the space into four air chambers, i.e., n=4, namely the first air chamber 40a, the second air chamber 40b, the third air chamber 40c, and the fourth air chamber 40d. The bending angle of the first guide vanes 42a on both sides of the first jet hole at the front end of the first air chamber 40a (with the end closest to the workbench as the front) is α1. The bending angle of the second guide vanes 42b on both sides of the second jet hole at the front end of the second air chamber 40b is α2. The bending angle of the third guide vanes 42c on both sides of the third jet hole at the front end of the third air chamber 40c is α3. The fourth air chamber 40d... The bending angle of the fourth guide vane 42d on both sides of the fourth jet hole at the front end of 0d is α4; the included angle between the two strip-shaped air boxes at the end is 10°, i.e., γ = 4°; the distance between two adjacent jet holes on the same strip-shaped air box is 4mm, i.e., b = 4mm; the distance between the table surfaces is 400mm, i.e., D = 400mm; the number of strip-shaped air boxes is 9, i.e., N = 9; the first bending angle α1 at the head is 78°; k is 180; then Δα = (180 * 10 * 4 * 4) / (400 * 9) = 8°; therefore:

[0058] α1 78° 102° α2 86° 94° α3 94° 86° α4 102° 78°

[0059] In this embodiment, the bending angle of the first guide vane is the same as the supplementary angle of the fourth guide vane, and the bending angle of the second guide vane is the same as the supplementary angle of the third guide vane. That is, the first, second and third and fourth guide regions are symmetrical.

[0060] To reduce wind resistance and noise, the inner wall of the air chamber is connected to the guide area (guide vane) by a slope transition. At the same time, an arc-shaped air guide surface is provided between the top surface of the air chamber and the inner wall of the rear end of the air chamber to reduce the impact noise of the airflow.

[0061] A connecting chamber 43 is provided at the rear end of the strip-shaped gas box. The connecting chamber is a rectangular structure that protrudes backward. The number of connecting chambers in the connecting chamber is the same as the number of gas chambers. One connecting chamber connects to one gas chamber. The outer wall of the connecting chamber is provided with connecting holes that are the same as the number of connecting chambers and are connected to each other for connecting to the gas source.

[0062] To improve the chip removal effect, in this embodiment, the strip-shaped air box 4 is slightly inclined downwards onto the working surface of the workbench. (See reference...) Figure 9 Furthermore, the angle β between the two is greater than or equal to 5 degrees and less than or equal to 15 degrees, which causes the airflow direction to form a certain angle with the workbench surface, making the airflow impactful and improving the chip removal effect.

[0063] In this application, a rectangular mounting cavity 220 is provided on the side wall of the support base 22. This mounting cavity is located above the workbench surface (in the initial state). The edge of the mounting cavity 220 is recessed inward to form a connecting step surface 221. A screw hole is provided on this step surface. A main housing 31 is provided inside the mounting cavity. The main housing can be inserted into the opening end of the mounting cavity. A cavity 310 with an open rear end is formed on the main housing 31. The front end face of the main housing 31 is an arc-shaped surface, which is flush with the side wall of the support base 22 to form a complete arc-shaped surface. The front end edge of the main housing extends outward to form a connecting flange 311, which can be inserted into the step surface 221. A connecting hole is provided on the connecting flange, which corresponds one-to-one with the screw hole on the step surface for fixing the main housing. The front end face of the main housing 31 is at an equal angle. A strip-shaped hole 312 is provided, which tends to be vertical and connects to the cavity. A secondary housing 32 is detachably installed in the cavity. The secondary housing has a rectangular structure and can be inserted into the cavity of the main housing from the rear end. To ensure installation accuracy, a strip-shaped protrusion 313 is provided on the inner wall of the cavity of the main housing. At the same time, a strip-shaped guide groove 321 corresponding to the strip-shaped protrusion 313 is provided on the outer wall of the secondary housing 32, which can realize the quick and accurate assembly of the two. The front end face of the secondary housing 32 is arc-shaped and serves as the mounting surface. This mounting surface is coaxial with the front end face of the main housing 31. A strip-shaped mounting groove 322 corresponding to the strip-shaped hole 312 is provided on the working surface. A hole 3220 for the connecting chamber to pass through is provided at the lower end of the strip-shaped mounting groove. The strip-shaped air box 4 is detachably installed in the strip-shaped mounting groove.

[0064] The strip-shaped air box 4 is connected to a pneumatic reversing valve, which enables the jet holes on the same strip-shaped air box to spray in an alternating manner, that is, the first air chamber, second air chamber, third air chamber and fourth air chamber on each strip-shaped air box can be ventilated and sprayed in sequence.

[0065] See Figures 15-23The pneumatic reversing valve includes a valve body 51, within which a buffer cavity 512 and a circular impeller cavity 50 are formed. An impeller 6 is rotatably mounted within the impeller cavity 50. An air inlet 510 is located on the side wall of the valve body 51, connecting to the impeller cavity 50 and used to drive the impeller 6 to rotate. In this embodiment, the air inlet 510 is tangent to the impeller cavity. A connecting air hole 511 is provided on the side wall of the impeller cavity 50, connecting to the buffer cavity, and its cross-sectional area is larger than that of the air inlet. Valve core holes 502 are evenly distributed circumferentially on the bottom surface of the impeller cavity, and the axis of the valve core holes is horizontal. The number of air passages along the rotation axis of the impeller is the same as the number of air chambers on a strip-shaped air box; in this embodiment, there are four. A first air passage 514a and a second air passage 514b are located on the side wall of the valve core hole 502. The first air passage 514a connects to the buffer chamber 512, and the second air passage 514b connects to the air outlet 514 on the side wall of the valve body 1. There are four air outlets 514, each connecting to a second air passage on one of the four valve core holes. The four air outlets sequentially connect to the first air chamber, the second air chamber, the third air chamber, and the fourth air chamber. The first air passage 514a and the second air passage 514b are located in different radial directions. On the surface, there is a height difference between the two. A valve core 82 is rotatably installed inside the valve core hole. A valve hole 820 is provided on the side wall of the valve core 82. In this embodiment, the valve hole 820 is inclined and used for unidirectional connection between the first air passage 514a and the second air passage 514b. The connection angle of the valve core is (360° / n) + α. At the same time, the installation phase difference between adjacent valve cores is 360° / n, where n is the number of valve core holes, 3°≤α≤5°, preferably n is 4. Then the connection angle of the valve core is 90° + α. The connection angle is the rotation of the valve core from the beginning to the end of the connection. The valve core is designed with a compensation angle α, ensuring that there is always one path in any state (angle) to guarantee the stability and reliability of the directional valve and prevent jamming. A gear 81 is fixed on the top of the valve core, and a gear ring 62 is provided on the bottom surface of the impeller 6, which meshes with the gear 81 and is used to drive the valve core to rotate synchronously. In order to improve space utilization and increase the impeller thickness under the same thickness to improve the driving effect, in this embodiment, the bottom surface of the impeller 6 is concave to form a circular groove 60, and the gear ring 62 is set in the circular groove and is coaxial with the impeller.

[0066] For ease of processing and assembly, the air inlet 510 and the air outlet are located on the front side wall of the valve body, and a recess 503 is provided on the rear side wall of the valve body. The first air passage is opened in the recess, and a cover plate 53 is sealed and connected to the open end of the recess to form a sealed buffer chamber.

[0067] A concave hole with a central center is provided on the top surface of the valve body. A first shaft hole is provided in the center of the concave hole for installing the impeller. A cover plate 52 is sealed and connected to the concave hole to form a sealed impeller cavity. A second shaft hole is provided in the center of the cover plate 52 for the main shaft at the upper end of the impeller to be fitted. A first guide sleeve 72 is provided in the first shaft hole, and a second guide sleeve 71 is provided in the second shaft hole.

[0068] See Figure 20 and Figure 23 The valve core includes a cylindrical valve core body with the same diameter as the valve core bore. The valve bore 820 is inclined on the valve core body, meaning the axis of the valve bore is inclined to the axis of the valve core body. Sealing rings are provided at both ends of the valve bore (valve core body). An upper shaft 821 and a lower shaft 822 are respectively provided at both ends of the valve core body, both with a diameter smaller than the diameter of the valve core body. At the same time, a lower guide sleeve 74 and an upper guide sleeve 73 are provided inside the valve core bore. The lower guide sleeve 74 accommodates the lower shaft and achieves a rotatable connection, while the upper guide sleeve 73 accommodates the upper shaft and achieves a rotatable connection. Meanwhile, the upper end of the upper guide sleeve extends radially outward to form a support part. At the same time, a concave hole is provided at the open end of the valve core bore to accommodate the support part. The lower guide sleeve 74 and the upper guide sleeve 73 improve the rotation accuracy and reliability of the valve core. By setting up a support structure, axial force on the valve core is avoided, resulting in high reliability, long service life, and ease of production, processing, and assembly.

[0069] A spline hole is provided at the end of the upper shaft, and a spline shaft is provided on the gear. The spline shaft is sleeved in the spline hole to achieve radial fixation. At the same time, a bolt passes through the gear and the spline shaft from top to bottom and is connected to the valve core to achieve a fixed connection of the gear. This facilitates processing and assembly, reduces production costs, and is also easy to maintain and replace, with low maintenance costs.

[0070] This invention relates to a multi-axis machining system. It employs a dual-axis rotating worktable, enabling arbitrary angle adjustment of parts and machining of complex curved surfaces. It features a small installation space, low cost, and easy control. An air-blowing chip removal device cleans debris from the worktable and parts on it. Combined with the rotating worktable, it achieves omnidirectional, dead-angle-free chip removal with high efficiency and effectiveness, facilitating fully automated loading, processing, and unloading. The main and auxiliary housing structure facilitates machining and assembly, reduces manufacturing costs, and is easy to maintain. The air-blowing chip removal device uses a split structure, reducing machining difficulty and cost, allowing for easy installation and high flexibility. The staggered, interconnected structure enhances airflow impact and cleaning effect. Different orientations in the diversion zones increase coverage area while reducing the number of air chambers, enabling omnidirectional cleaning. The system offers excellent cleaning performance at a low cost. A baffle structure guides airflow, preventing internal gas impact and vibration / noise, resulting in good performance and low noise. A pneumatic reversing valve structure enables automatic pneumatic reversal, achieving single-input, multi-output operation with good output sequence. A buffer chamber structure improves valve reliability, reduces wind noise, and facilitates manufacturing. A rotating valve core design ensures force balance, overall stability, and vibration-free operation. A compensation angle increases the valve core's connection angle, ensuring at least one connection in any valve state, preventing jamming and guaranteeing reliability and stability. This multi-axis machining system is compact and small, capable of machining complex curved surfaces and automatically removing chips, providing a guarantee for fully automated loading, unloading, and processing.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-axis machining system, characterized by, include: A machine tool, wherein the machine tool is provided with a worktable for fixing parts and a spindle for machining parts on the worktable; An air-blowing chip removal device is connected to an air source, with its air outlet facing the worktable and capable of cleaning chips on the worktable and parts. The air blowing chip removal device includes multiple strip-shaped air boxes arranged in an arc around the axis of the workbench surface and set at equal angles. The strip-shaped air boxes are inclined downwards on the working surface of the workbench. The strip-shaped air boxes are provided with partitions that divide the strip-shaped air boxes into at least three air chambers. The front end face of each air chamber has parallel strip-shaped air jet holes. The edges of the air jet holes are bent forward to form guide vanes. Two guide vanes on the same air jet hole are parallel to each other to form a guide zone for guiding air. The guide zones located on the same strip-shaped air box have different left and right orientations. The strip-shaped air box is connected to a pneumatic reversing valve, which enables the air jets on the same strip-shaped air box to spray in an alternating manner; The workbench includes a base, a support seat is rotatably mounted at the end of the base, the rotation axis of the support seat is parallel to the horizontal plane, a support base is fixed at the end of the support seat, a circular workbench body is rotatably mounted on the support base, the rotation axis of the workbench body is perpendicular to the rotation axis of the support seat, the side wall of the support seat is provided with an arc-shaped surface facing the workbench body, the axis of the arc-shaped surface is parallel to the rotation axis of the workbench body, and the air blowing chip removal device is mounted on the arc-shaped surface. The pneumatic reversing valve includes a valve body, which has a buffer chamber and a circular impeller chamber formed inside. The bottom surface of the impeller chamber has valve core holes evenly distributed around its circumference, the same number as the number of air chambers on a single strip-shaped air box. A valve core is rotatably installed in the valve core hole. The connection angle of the valve core is (360° / n) + α, and the installation phase difference between adjacent valve cores is 360° / n, where n is the number of valve core holes, and 3°≤α≤5°.

2. The multi-axis machining system of claim 1, wherein: The ratio of the width of the guide zone to the width of the air chamber is greater than or equal to 1 / 8 and less than or equal to 1 / 5. The bending angle α of the guide vane at the end of the strip-shaped air box is greater than or equal to 70 degrees and less than or equal to 80 degrees. The bending angle of the guide vanes on two adjacent jet holes increases or decreases in the same direction with an increment Δα.

3. The multi-axis machining system of claim 2, wherein: ， Where k is a constant, and 120≤k≤180, γ is the angle between the two strip-shaped air boxes at the end, n is the number of air chambers on a single strip-shaped air box, b is the distance between two adjacent jet holes, D is the diameter of the workbench surface, and N is the number of strip-shaped air boxes.

4. The multi-axis machining system of claim 1, wherein: The strip-shaped air box is inclined downwards to the working surface of the workbench, and the included angle β between the two is greater than or equal to 5 degrees and less than or equal to 15 degrees.

5. The multi-axis machining system of claim 1, wherein: A rectangular mounting cavity is formed in the side wall of the support base. A main housing is provided in the mounting cavity. The main housing has a cavity with an open rear end. The front end face of the main housing is arc-shaped and flush with the side wall of the support base. The front edge of the main housing extends outward and forms a connecting flange. A strip-shaped hole communicating with the cavity is formed at an equal angle on the front end face of the main housing. A secondary housing is installed in the mounting cavity. The front end face of the secondary housing is arc-shaped and serves as a mounting surface. The mounting surface is coaxial with the front end face of the main housing. A strip-shaped mounting groove corresponding to the strip-shaped hole is formed on the working surface. The strip-shaped air box is detachably installed in the strip-shaped mounting groove.

6. The multi-axis machining system of claim 1, wherein: An impeller is rotatably mounted inside the impeller cavity. The side wall of the valve body is provided with an air inlet that communicates with the impeller cavity and drives the impeller to rotate. The side wall of the impeller cavity is provided with a connecting air hole that communicates with the buffer cavity and has a cross-sectional area larger than the air inlet. The side wall of the valve core hole is provided with a first air passage that communicates with the buffer cavity and a second air passage that communicates with the air outlet hole of the side wall of the valve body. The first air passage and the second air passage are located on different radial planes. The side wall of the valve core is obliquely provided with a valve hole that communicates with the first air passage and the second air passage. A gear is fixed to the top of the valve core, and the bottom surface of the impeller is provided with a gear ring that meshes with the gear and drives the valve core to rotate synchronously.

7. The multi-axis machining system of claim 6, wherein: The valve core includes a valve core body with the same diameter as the valve core hole. An upper shaft and a lower shaft are respectively provided at both ends of the valve core body. The valve hole is formed on the valve core body, and sealing rings are provided at both ends of the valve hole. A lower guide sleeve for the lower shaft and an upper guide sleeve for the upper shaft are provided inside the valve core hole. The upper end of the upper guide sleeve extends radially outward to form a support portion. The open end of the valve core hole has a recessed hole for the support portion to be fitted into. A spline hole is provided at the end of the upper shaft. A spline is provided on the gear, and the spline is fitted into the spline hole for radial fixation. A bolt passes through the gear and the spline sequentially from top to bottom and is then connected to the valve core.

Images