Cradle mechanism for five-axis machine tool

Abstract

The invention relates to the technical field of machine tool machining, and discloses a cradle mechanism for a five-axis machine tool, the cradle mechanism is installed on the five-axis machine tool and comprises a frame body, a connecting assembly and a limiting assembly, the frame body is connected with the five-axis machine tool through the connecting assembly, and the limiting assembly is used for limiting the connecting assembly on the frame body; through the arrangement of the connecting assembly and the limiting assembly, the connecting strength of the frame body and the second driving mechanism can be improved, that is, the rigidity of the five-axis machine tool is indirectly improved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, in particular to a cradle mechanism for a five-axis machine tool. Background Art

[0002] The five-axis cradle mechanism is part of the five-axis linkage CNC machine tool. The five-axis linkage CNC machine tool is a machine tool with high technological content, high precision, and is specially used for processing complex surfaces. This machine tool system has a significant influence on a country's aviation, aerospace, military, scientific research, precision instruments, high-precision medical equipment and other industries. The five-axis linkage CNC machine tool system is a means to solve the processing of impellers, blades, marine propellers, heavy generator rotors, turbine rotors, large diesel engine crankshafts, etc. It is a kind of CNC turntable and a common component of machine tool processing. The workpiece is fixed on the five-axis table of the fifth axis of the cradle mechanism, and the processing requirements are met through the combination of rotation and swing of the five-axis table.

[0003] For example, the patent with publication number CN111390579B and announcement date September 1, 2020 discloses a vertical five-axis linkage machine tool, which relates to the technical field of CNC machine tools, including a machine tool bed, a base, an X-axis moving assembly, a Y-axis moving assembly, a Z-axis moving assembly and a cradle-type workbench, wherein the base is fixedly mounted on the machine tool bed, the X-axis moving assembly includes an X-axis slide arranged above the base, an X-axis drive device arranged between the X-axis slide and the base for driving the X-axis slide to freely reciprocate along the X-axis direction, and an X-axis arranged on the base. The slide rail is slidingly connected to the X-axis slide rail, the Y-axis moving assembly includes a Y-axis slide arranged above the X-axis slide, a Y-axis driving device arranged between the Y-axis slide and the X-axis slide for driving the Y-axis slide to freely reciprocate along the Y-axis direction, and a Y-axis slide rail arranged on the X-axis slide, the Y-axis slide is slidingly connected to the Y-axis slide rail, the Z-axis moving assembly includes a Z-axis slide arranged on the side of the Y-axis slide, and a Z-axis driving device arranged between the Z-axis slide and the Y-axis slide for driving the Z-axis slide to freely reciprocate along the Z-axis direction, and a Y-axis slide rail arranged on the Y-axis slide. The Z-axis slide rail on the side, the Z-axis slide table is slidably connected to the Z-axis slide rail, the cradle-type workbench is arranged on the machine tool bed and located below the Z-axis slide table, and is characterized in that: both ends of the X-axis slide rail, the Y-axis slide rail and the Z-axis slide rail are provided with buffer anti-collision components, the buffer anti-collision components include a cylinder, a piston, a push rod, a first spring and a sealing ring, the cylinder is provided with a first chamber with one end open and the other end closed, and a second chamber located outside the first chamber and in a circular shape with both ends closed, and a plurality of connecting first chamber and second chamber are provided on the side wall of the first chamber The piston is slidably and hermetically connected to the inner wall of the first chamber, one end of the push rod is fixedly connected to the piston, and the other end of the push rod is located outside the first chamber, one end of the first spring is fixedly connected to an end of the second chamber away from the first through hole, the other end of the first spring is fixedly connected to a sealing ring, and the sealing ring is slidably and hermetically connected to the inner wall of the second chamber, and a second through hole is provided on the side wall of the second chamber that contacts with one end of the first spring.

[0004] In the prior art, the cradle base is connected to the bed by bolts. This structure weakens the rigidity of the machine tool, resulting in reduced processing accuracy, thereby affecting the normal processing of the workpiece. Summary of the invention

[0005] The object of the present invention is to provide a cradle mechanism for a five-axis machine tool to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cradle mechanism for a five-axis machine tool, installed on the five-axis machine tool, including a frame, a connecting assembly and a limit assembly. The frame is connected to the five-axis machine tool through the connecting assembly, and the limit assembly is used to limit the connecting assembly on the frame.

[0007] Preferably, the connection assembly includes a first flange and a second flange, the first flange and the second flange are connected by a first bolt, and the frame is connected to the five-axis machine tool through the first flange and the second flange.

[0008] Preferably, the limiting assembly includes a limiting plate, which is mounted on a side of the second flange close to the frame, and the limiting plate is connected to the second flange via a second bolt.

[0009] Preferably, a limiting groove is provided on a side surface of the limiting plate close to the second flange, and the limiting groove and the first bolt form a limiting interference fit.

[0010] Preferably, the frame includes a first support block and a second support block, the second support block is slidably connected to the first support block, and a buffer assembly is provided between the first support block and the second support block, and the buffer assembly is used to reduce the sliding speed of the second support block on the first support block.

[0011] Preferably, the buffer assembly includes a spring, the upper end of the spring is connected to the second support block, and the lower end of the spring is connected to the second support block.

[0012] Preferably, a cylinder is provided inside the first supporting block.

[0013] Preferably, a brake ring is fixedly mounted on the second support block, the brake ring is sleeved on the outer wall of the five-axis table, and a brake assembly is installed inside the brake ring, and the brake assembly can brake the five-axis table when it rotates.

[0014] Preferably, the brake assembly includes a hydraulic chamber, an oil filling port and a brake pad, the hydraulic chamber and the oil filling port are both opened inside the brake ring, one end of the oil filling port is connected to the hydraulic chamber, and the brake pad is fixedly installed inside the hydraulic chamber.

[0015] Preferably, an adjustment component is also installed in the second support block, and the adjustment component can adjust the size of the hydraulic cavity according to the weight of the workpiece itself.

[0016] The beneficial effect of the present invention is that: in the above technical solution, the present invention can improve the connection strength between the frame and the second driving mechanism by setting the connecting component and the limiting component, that is, indirectly improve the rigidity of the five-axis machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0019] Figure 2 A front view provided for an embodiment of the present invention;

[0020] Figure 3 A front cross-sectional view provided for an embodiment of the present invention;

[0021] Figure 4 The embodiment of the present invention provides Figure 3 A in the enlarged view;

[0022] Figure 5 The embodiment of the present invention provides Figure 3 Enlarged view of point B in .

[0023] Description of reference numerals:

[0024] 1. cradle mechanism; 11. connecting assembly; 111. first flange; 112. second flange; 113. first bolt; 114. limit plate; 115. second bolt; 116. limit groove; 12. frame; 121. first support block; 122. slide groove; 123. second support block; 124. slider; 125. hole; 126. five-axis table; 13. buffer assembly; 131. spring; 14. cylinder; 15. Brake ring; 16. Brake assembly; 161. Hydraulic chamber; 1611. Movable chamber; 1612. Annular chamber; 162. Oil filling port; 163. Brake pad; 17. Adjustment assembly; 171. First sleeve; 172. Inner shaft; 173. Worm; 174. Worm wheel; 175. Second sleeve; 176. Screw; 177. Piston plate; 2. Milling head mechanism; 3. First drive mechanism; 4. Second drive mechanism; 5. Third drive mechanism. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-5 As shown, an embodiment of the present invention provides a cradle mechanism for a five-axis machine tool, which is installed on the five-axis machine tool and includes a frame 12, a connecting component 11 and a limiting component. The frame 12 is connected to the five-axis machine tool through the connecting component 11, and the limiting component is used to limit the connecting component 11 on the frame 12.

[0028] Specifically, the five-axis machine tool includes a cradle mechanism 1, a milling head mechanism 2, a first drive mechanism 3 and a second drive mechanism 4. The milling head mechanism 2 is a milling head that is above the cradle mechanism 1 and can rotate. The first drive mechanism 3 is provided with three groups. The three groups of first drive mechanisms 3 are connected to the milling head mechanism 2 to drive the milling head mechanism 2 to adjust the position along the x, y and z axes. The first drive mechanism 3 can be a linear drive mechanism such as an electric push rod and a hydraulic cylinder. In the present embodiment, the three groups of first drive mechanisms 3 are all screw assemblies driven by a motor. This is the prior art and will not be repeated. The cradle mechanism 1 is approximately V-shaped. In the initial state, that is, when the workpiece has not yet been placed on the five-axis table, the cradle mechanism 1 of the V-shaped structure opens upward, and the second drive mechanism 4 is connected to the cradle mechanism 1, that is, the cradle mechanism 1 is connected to the body of the five-axis machine tool through the second drive mechanism 4. The second drive mechanism 4 drives the cradle mechanism 1 to swing with the x-axis as the center. The first support block 121 The second driving mechanism 4 is connected, and the first support block 121 is provided with two groups, which are respectively located on both sides of the second support block 123. The second support block 123 is provided with a third driving mechanism 5, which is connected to the five-axis table and is used to drive the five-axis table to rotate on the second support block 123. The second driving mechanism 4 and the third driving mechanism 5 can both be rotating driving mechanisms such as motors and rotating cylinders 14. This is the prior art and will not be repeated. In actual use, the workpiece is placed on the five-axis table, and the cradle mechanism 1 is in an initial state, that is, the cradle mechanism 1 with a V-shaped structure is in an open upward state. The five-axis table fixes the workpiece by vacuum adsorption. A five-jaw chuck or other clamps can also be set on the five-axis table to fix the workpiece. Vacuum adsorption and clamps are both prior art and will not be repeated. By setting the connecting component 11 and the limiting component, the connection strength between the frame 12 and the second driving mechanism 4 can be improved, that is, the rigidity of the five-axis machine tool is indirectly improved.

[0029] In an optional embodiment, preferably, the connecting assembly 11 includes a first flange 111 and a second flange 112 , the first flange 111 and the second flange 112 are connected by a first bolt 113 , and the frame 12 is connected to the five-axis machine tool through the first flange 111 and the second flange 112 .

[0030] Specifically, the first flange 111 and the second flange 112 are each provided with a plurality of screw holes, and the first bolt 113 is threadedly connected to the first flange 111 and the second flange 112 through the screw holes. The plurality of first threads also fix the two ends of the frame 12 on the second drive mechanism 4 through the first flange 111 and the second flange 112. The arrangement of the first flange 111 and the second flange 112 is beneficial to improving the connection strength between the frame 12 and the second drive mechanism 4, thereby indirectly improving the rigidity of the five-axis machine tool.

[0031] In an optional embodiment, preferably, the limiting assembly includes a limiting plate 114 , which is installed on a side of the second flange 112 close to the frame 12 , and the limiting plate 114 is connected to the second flange 112 via a second bolt 115 .

[0032] Specifically, a limiting groove 116 is provided on one side of the limiting plate 114 close to the second flange 112, and the limiting groove 116 and the first bolt 113 form a limiting interference fit. In actual use, when the first bolt 113 passes through the first flange 111 and the second flange 112, the frame 12 is fixed on the five-axis machine tool. At this time, the limiting plate 114 can be attached to the second flange 112, so that the nut in the first bolt 113 enters the limiting groove 116, and the first bolt 113 is limited and squeezed by the limiting groove 116. When the bolt 115 is installed on the second flange 112, since the second bolt 115 is only installed on the second flange 112, the second bolt 115 will not be affected by the relative displacement or shaking of the connection between the first flange 111 and the second flange 112. Since the second bolt 115 is not affected, the limit plate 114 can stably limit the first bolt 113 on the second flange 112 to prevent the first bolt 113 from loosening and detaching, thereby indirectly improving the connection strength between the first flange 111 and the second flange 112.

[0033] In another embodiment of the present invention, further, the frame 12 includes a first support block 121 and a second support block 123, the second support block 123 is slidably connected to the first support block 121, and a buffer assembly 13 is provided between the first support block 121 and the second support block 123, and the buffer assembly 13 is used to reduce the sliding speed of the second support block 123 on the first support block 121.

[0034] Specifically, when the frame 12 is in the initial state, that is, the workpiece to be processed has not yet been placed on the five-axis table 126, the frame 12 is in a V-shaped structure with the opening facing upward, and the five-axis table 126 is rotatably mounted on the second support block 123. A slide groove 122 is provided on a side of the first support block 121 close to the first support block 121, and a slider 124 is provided on a side of the second support block 123 close to the first support block 121. The slider 124 is located inside the slide groove 122 and forms a sliding guide with the slide groove 122. The groove direction of the slide groove 122 is consistent with the axial direction of the five-axis table 126.

[0035] Furthermore, the buffer assembly 13 includes a spring 131, the upper end of the spring 131 is connected to the second support block 123, and the lower end is connected to the second support block 123. The second support block 123 is approximately a cross-shaped structure. When the workpiece is placed on the five-axis table 126, the second support block 123 begins to descend under the gravity of the workpiece, and the slider 124 descends in the slide groove 122. The spring 131 gradually contracts under the influence of gravity. The impact force generated when the second support block 123 descends is alleviated by the contraction of the spring 131 itself, thereby preventing the impact force from being transmitted to the first support block 121, thereby reducing the impact on the second drive mechanism 4.

[0036] Secondly, the first support block 121 is provided with a cylinder 14 in a vertical arrangement. When in the initial state, the cylinder 14 is in a contracted state, and the telescopic shaft at its output end does not contact the second support block 123. The slider 124 is located at the top of the slide groove 122. When the workpiece is placed on the five-axis table 126, the second support block 123 has slid down on the first support block 121, and the cylinder 14 begins to stretch, so that the telescopic shaft at its output end contacts the surface of the second support block 123. Under the push of the cylinder 14, , forcing the second support block 123 carrying the workpiece to rise, and at the same time the slider 124 slides in the slide groove 122 until the slider 124 resets and rises to the top of the slide groove 122. At this time, the second support block 123 is reset to its initial horizontal height, and the cylinder 14 is also kept in a stretched state. The slider 124 is restricted to the top of the slide groove 122 by the stretched cylinder 14, and the slider 124 cannot slide in the slide groove 122, thereby avoiding the shaking of the second support block 123 and the five-axis table 126 when the cradle mechanism 1 swings.

[0037] In the above embodiment, since the five-axis table 126 is a component for mounting the workpiece, the five-axis table 126 will tilt with the swing of the cradle mechanism 1 during processing. When the workpiece is mounted on the five-axis table 126, its center of gravity will deviate from the axis position. When the workpiece tilts, a torsional force will be generated, and the third drive mechanism 5 has limited anti-twisting ability. When the mass of the workpiece is large and the center of gravity is offset more, the torsional force will be very large, which will cause damage to the third drive mechanism 5 and affect the service life of the third drive mechanism 5. In addition, since the braking force on the five-axis table 126 is limited, there is a situation where the workpiece position is offset during processing, which affects the processing accuracy. Therefore, in another embodiment of the present invention, further, a brake ring 15 is fixedly installed on the second support block 123, and the brake ring 15 is sleeved on the outer wall of the five-axis table 126. A brake assembly 16 is installed inside the brake ring 15, and the brake assembly 16 can brake the five-axis table 126 when it rotates.

[0038] Specifically, the brake ring 15 is rotatably connected to the five-axis table 126, the central axis of the brake ring 15 is colinear with the central axis of the five-axis table 126, the brake assembly 16 includes a hydraulic chamber 161, an oil filling port 162 and a brake pad 163, the hydraulic chamber 161 and the oil filling port 162 are both opened inside the brake ring 15, one end of the oil filling port 162 is connected to the hydraulic chamber 161, and the brake pad 163 is fixedly installed inside the hydraulic chamber 161.

[0039] The other end of the oil filling port 162 is connected to an external hydraulic oil pump. The hydraulic chamber 161 has an opening, which is opened on the inner side of the brake ring 15. The brake pad 163 is installed at the opening of the hydraulic chamber 161 and the opening is sealed, so that the hydraulic chamber 161 is a sealed chamber. In actual use, the external hydraulic oil pump injects a certain amount of hydraulic oil into the hydraulic chamber 161. At this time, the pressure in the hydraulic chamber 161 begins to rise. The pressure increase will cause the brake pad 163 to deform inward and hold the peripheral surface of the five-axis table 126. The friction contact between the five-axis table 126 realizes the braking of the five-axis table 126. Similarly, when the five-axis table 126 needs to rotate, the external hydraulic oil pump can extract the hydraulic oil from the hydraulic chamber 161. At this time, the pressure in the hydraulic chamber 161 drops, and the brake pad 163 is deformed and reset. The five-axis table 126 can rotate freely after losing the grip of the brake pad 163. Through the setting of the brake pad 163, the braking of the five-axis table 126 can be achieved without the third drive mechanism 5 participating in the braking, thereby avoiding the position displacement of the workpiece.

[0040] The above-mentioned embodiment discloses that when the workpiece is tilted, a torsional force will be generated, and the greater the weight of the workpiece, the greater the anti-torsion load on the second drive mechanism 4, and the more difficult it is to brake it. Therefore, in another embodiment of the present invention, further, an adjustment component 17 is installed in the second support block 123, and the adjustment component 17 can adjust the size of the hydraulic chamber 161 according to the weight of the workpiece itself.

[0041] Specifically, the adjustment component 17 cooperates with the buffer component 13. The adjustment component 17 can adjust the size of the hydraulic chamber 161 according to the descending height of the second support block 123 on the first support block 121. When the weight of the workpiece is heavier, the spring 131 shrinks shorter under the influence of gravity, and the second support block 123 slides and descends lower in the slide groove 122 through the slider 124. At the same time, the adjustment component 17 adjusts the volume of the hydraulic chamber 161 to gradually become smaller. As the volume of the hydraulic chamber 161 becomes smaller, when the external hydraulic oil pump injects a certain amount of hydraulic oil into the hydraulic chamber 161, the pressure in the hydraulic chamber 161 will be greater, the deformation amplitude of the brake pad 163 will be greater, and the brake pad 163 and the five The larger the contact area of ​​the circumference of the axis table 126, the greater the clamping force on it, and the greater the friction between the two. By increasing the friction, the clamping force and the contact area, when the five-axis table 126 carries a heavy workpiece, the five-axis table 126 can be quickly braked. Similarly, the lighter the workpiece, the smaller the space of the corresponding hydraulic chamber 161, and the smaller the deformation amplitude of the brake pad 163. Through the adjustment of the hydraulic chamber 161, not only can the braking of the heavy workpiece be achieved, but also when the brake pad 163 can achieve braking, the brake pad 163 can be prevented from being in a state of large deformation all the time, thereby indirectly increasing the service life of the brake pad 163.

[0042] In an optional embodiment, the adjustment assembly 17 includes a piston plate 177 , and the piston plate 177 can move radially in the hydraulic chamber 161 during the descent of the second support block 123 .

[0043] Specifically, the hydraulic chamber 161 includes an active chamber 1611 and an annular chamber 1612. The annular chamber 1612 is arranged in an annular shape. The active chamber 1611 is opened along the radial direction of the brake ring 15, and is provided with two groups, which are symmetrically distributed along the annular chamber 1612. The two groups of active chambers 1611 are both connected with the annular chamber 1612. The piston plate 177 is located in the active chamber 1611 and forms a dynamic sealing connection with the active chamber 1611. The brake pad 163 is located in the hydraulic chamber 161. The oil filling port 162 is connected with the hydraulic chamber 161. One end opening of the active chamber 1611 is connected with the annular chamber 1612. The piston plate 177 is arranged at the opening of one end of the active chamber 1611 away from the annular chamber 1612, so the movement of the piston plate 177 in the active chamber 1611 can realize the volume adjustment of the active chamber 1611.

[0044] During actual use, when the cradle mechanism 1 is in the initial state, the staff places the workpiece to be processed on the five-axis table 126. As the weight on the five-axis table 126 increases, the second support block 123 slides down in the slide groove 122 through the slider 124. At this time, the piston plate 177 can move to different degrees in the active chamber 1611 according to the descending height of the second support block 123 on the first support block 121, that is, the volume of the hydraulic chamber 161 can be indirectly adjusted by the movement of the piston plate 177 in the active chamber 1611, so that the volume of the hydraulic chamber 161 can be adjusted according to the weight of the workpiece, thereby controlling the brake pad 163 to deform to different degrees according to the quantitative hydraulic oil, so as to achieve braking when the five-axis table 126 carries workpieces of different weights.

[0045] Furthermore, the adjustment assembly 17 further includes a first sleeve 171, an inner shaft 172, a worm 173, a worm wheel 174, a second sleeve 175 and a screw 176. The first support block 121 is provided with a hole 125 inside, the first sleeve 171 is located in the hole 125 and forms a sliding guide with the hole 125, the inner shaft 172 is located inside the first sleeve 171, a spiral groove is provided inside the first sleeve 171, a protrusion is provided on the outer wall of the inner shaft 172, the protrusion is located in the spiral groove and forms a sliding guide with the spiral groove, and the lower wall of the worm 173 is provided with a protrusion. The end is fixedly connected to the upper end of the inner shaft 172, the upper end of the worm 173 is rotatably connected to the inner wall of the brake ring 15, the worm wheel 174 is rotatably connected to the inner wall of the brake ring 15, the worm 173 is meshed with the worm wheel 174, one end of the second sleeve 175 is fixedly connected to the center of the worm wheel 174, and is rotatably connected to the inner wall of the brake ring 15, the interior of the second sleeve 175 is hollow, and the inner wall is provided with an internal thread, one end of the screw 176 extends into the second sleeve 175, and forms a threaded fit with the second sleeve 175, and the other end of the screw 176 is fixedly connected to the piston plate 177.

[0046] Among them, the first sleeve 171 and the inner shaft 172 are both installed inside the second support block 123, the worm 173, the worm wheel 174 and the second second gate are all located inside the brake ring 15, the upper end of the inner shaft 172 passes through the second support block 123 and extends into the brake ring 15, and the end extending into the brake ring 15 is connected to the worm 173, and the active cavity 1611 and the piston plate 177 are both rectangular structures, so the piston plate 177 does not rotate in the active cavity 1611, when the cradle mechanism 1 is in the initial state, the lower end of the first sleeve 171 abuts against the first support block 121;

[0047] In actual use, when the second support block 123 slides down on the first support block 121, the distance between the second support block 123 and the first support block 121 is continuously reduced. At this time, the first sleeve 171 continuously extends into the hole 125 in the second support block 123 under the resistance of the first support block 121, that is, the first sleeve 171 at this time rises in the hole 125, and the rise of the first sleeve 171 makes the protrusion of the outer wall of the inner shaft 172 slide in the spiral groove. With the cooperation of the spiral groove, the inner shaft 172 slides in the first sleeve 171 rotates, the rotation of the inner shaft 172 drives the worm 173 to rotate, and the rotation of the worm 173 drives the worm wheel 174 and the second sleeve 175 thereon to rotate. Since the second sleeve 175 is provided with an internal thread, and forms a threaded match with the screw 176, and the end of the screw 176 away from the sleeve is fixedly connected to the piston plate 177, the rotation of the second sleeve 175 will drive the screw 176 and the piston plate 177 to move to the side away from the worm wheel 174, and the volume size of the active chamber 1611 is adjusted by the movement of the piston plate 177;

[0048] When the cylinder 14 drives the second support block 123 to reset and rise, because a rubber ring is also provided in the hole 125 in the second support block 123, there is a certain friction between the rubber ring and the first sleeve 171, so when the first sleeve 171 extends into the hole 125, it will not fall during the rising process of the second support block 123 due to the friction between itself and the rubber ring, that is, it will not reset and fall as the gap between the first support block 121 and the second support block 123 opens. Since the first sleeve 171 does not reset and fall, the inner shaft 172, the worm 173, the worm wheel 174 and the second sleeve 175 will not reset The piston plate 177 will not be reset and will be in the horizontally adjusted position. By utilizing the self-locking property between the worm wheel 174 and the worm 173, when the worm 173 is in a stationary state, the worm wheel 174 is also in a stationary state, and the worm wheel 174 will not reversely drive the worm 173 to rotate. The worm wheel 174 cannot rotate, and the piston plate 177 cannot move. Therefore, when the hydraulic oil is injected into the active chamber 1611, the pressure increase in the active chamber 1611 will not force the piston plate 177 to reset and move in the active chamber 1611, thereby realizing the locking of the piston plate 177 after the position adjustment.

[0049] Furthermore, when processing a variety of different workpieces, the weights of the different workpieces are different. When the piston plate 177 has been adjusted when the first workpiece is placed, the worm gear 174 and the worm 173 will not drive the piston plate 177 to reset and move. Therefore, in this embodiment, the volume adjustment of the active chamber 1611 is irreversible, that is, the volume size of the active chamber 1611 can only be adjusted to be smaller, but not to be adjusted to be larger. Because when processing a variety of different workpieces, the weights of the different workpieces are different, when the piston plate 177 is adjusted at the first workpiece, the worm gear 174 and the worm 173 will not drive the piston plate 177 to reset and move. Therefore, in this embodiment, the volume adjustment of the active chamber 1611 is irreversible, that is, the volume size of the active chamber 1611 can only be adjusted to be smaller, and the volume cannot be adjusted to be larger. After one workpiece has been placed and adjusted, when placing the second workpiece, if the weight of the second workpiece is greater than the weight of the first workpiece, the lowering amplitude of the second support block 123 will increase, and the lower end of the first set of rods will contact the first support block 121 again, and force the first set of rods to continue to extend into the hole 125, and drive the inner shaft 172, the worm 173 and the worm wheel 174 to rotate again, and drive the piston plate 177 to move in the active chamber 1611, that is, the piston plate 177 moves to the side close to the annular chamber 1612. When the weight of the second workpiece is less than that of the first workpiece, the lower end of the first sleeve 171 will not contact the first support block 121, and the first sleeve 171 will not continue to extend into the hole 125, and the inner shaft 172, the worm 173 and the worm wheel 174 will not rotate, and the piston plate 177 will not continue to move. In this embodiment, the greater the weight of the workpiece, the greater the torsional load on the third driving mechanism 5. At this time, the greater the deformation amplitude of the brake pad 163, the greater the deformation amplitude of the brake pad 163. The greater the clamping force of the circumference of the five-axis table 126, the larger the contact area, and the greater the wear between the brake pad 163 and the five-axis table 126. If the deformation amplitude of the brake pad 163 is reduced at this time, the brake pad 163 may not be able to firmly clamp the circumference of the five-axis table 126 when it is deformed slightly due to the wear caused by large deformation. Therefore, the irreversible adjustment method of the volume of the movable cavity 1611 can avoid the five-axis table 126 from being unable to obtain effective braking when a lighter workpiece is placed on the five-axis table 126 in the future.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cradle mechanism for a five-axis machine tool, installed on a five-axis machine tool, characterized in that: It includes a frame, a connecting component and a limiting component. The frame is connected to a five-axis machine tool through the connecting component, and the limiting component is used to limit the connecting component on the frame.

2. The cradle mechanism for a five-axis machine tool according to claim 1, characterized in that: The connecting assembly comprises a first flange and a second flange, the first flange and the second flange are connected via a first bolt, and the frame is connected to the five-axis machine tool via the first flange and the second flange.

3. The cradle mechanism for a five-axis machine tool according to claim 2, characterized in that: The limiting assembly comprises a limiting plate, which is installed on a side surface of the second flange close to the frame body, and the limiting plate is connected to the second flange through a second bolt.

4. The cradle mechanism for a five-axis machine tool according to claim 3, characterized in that: A limiting groove is provided on a side surface of the limiting plate close to the second flange plate, and the limiting groove and the first bolt form a limiting abutment fit.

5. The cradle mechanism for a five-axis machine tool according to claim 1, characterized in that: The frame includes a first support block and a second support block, the second support block is slidably connected to the first support block, and a buffer component is arranged between the first support block and the second support block, and the buffer component is used to reduce the sliding speed of the second support block on the first support block.

6. The cradle mechanism for a five-axis machine tool according to claim 5, characterized in that: The buffer assembly comprises a spring, the upper end of the spring is connected to the second support block, and the lower end of the spring is connected to the second support block.

7. The cradle mechanism for a five-axis machine tool according to claim 5, characterized in that: A cylinder is provided inside the first supporting block.

8. The cradle mechanism for a five-axis machine tool according to claim 5, characterized in that: A brake ring is fixedly mounted on the second support block. The brake ring is sleeved on the outer wall of the five-axis table. A brake assembly is mounted inside the brake ring. The brake assembly can brake the five-axis table when it rotates.

9. The cradle mechanism for a five-axis machine tool according to claim 8, characterized in that: The brake assembly includes a hydraulic chamber, an oil filling port and a brake pad. The hydraulic chamber and the oil filling port are both opened inside the brake ring. One end of the oil filling port is connected to the hydraulic chamber. The brake pad is fixedly installed inside the hydraulic chamber.

10. The cradle mechanism for a five-axis machine tool according to claim 9, characterized in that: An adjustment component is also installed in the second support block, and the adjustment component can adjust the size of the hydraulic cavity according to the weight of the workpiece itself.

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