Six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading

Abstract

The utility model discloses a six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading, which comprises a rack, a floating loading mechanism and a floating loading mechanism, the vertical part is sequentially connected with an X-axis moving mechanism, a Z-axis moving mechanism, a floating loading mechanism and a main shaft; a Y-axis moving mechanism, a second B-axis rotary table mechanism and a C-axis rotary table mechanism are sequentially connected to the horizontal part. By adopting a six-shaft and six-linkage structure, all working procedures of milling, grinding and polishing can be realized by clamping a product at one time, and meanwhile, the floating loading mechanism is arranged to realize micro-force loading and synchronous movement of the main shaft along with normal vibration of a machine tool, so that surface defects caused by vibration acceleration of a cutter on the main shaft and the product are avoided, and the production efficiency is improved. And the machining precision and the machining efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, and more specifically, it particularly relates to a six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading. Background Art

[0002] In the high-precision polishing processing industry, in the processing of products such as ultra-smooth mirror surface polishing and ultra-smooth ceramic polishing, the processing equipment is generally imported, often costing millions or even tens of millions, and the price is extremely expensive. Although the numerical control machine tool processing equipment on the market has relatively high processing accuracy, the surface roughness still cannot meet the processing requirements of these products. In addition, for some small parts with complex appearance structures, such as watch frames, etc., mechanical processing cannot be used at present, and only manual polishing can be relied on, which not only has low efficiency, but also the number of skilled workers is small, resulting in reduced output. Summary of the Utility Model

[0003] The utility model provides a six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading to solve the problems raised in the above background art. To achieve the above object, the utility model provides the following technical solution: A six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading, including a machine frame, the machine frame is in a gantry structure, and the gantry structure includes a vertical part and a horizontal part;

[0004] An X-axis moving mechanism is arranged on the vertical part, a Z-axis moving mechanism is arranged on the X-axis moving mechanism, and the X-axis moving mechanism is used to drive the Z-axis moving mechanism to move along the X-axis direction; a floating loading mechanism is arranged on the Z-axis moving mechanism, and the Z-axis moving mechanism is used to drive the floating loading mechanism to move along the Z-axis direction; a first B-axis turntable mechanism is arranged on the floating loading mechanism, a main shaft is arranged on the first B-axis turntable mechanism, and the first B-axis turntable mechanism is used to drive the main shaft to rotate;

[0005] A Y-axis moving mechanism is arranged on the horizontal part, a second B-axis turntable mechanism is arranged on the Y-axis moving mechanism, and the Y-axis moving mechanism is used to drive the second B-axis turntable mechanism to move along the Y-axis direction; the second B-axis turntable mechanism drives the C-axis turntable mechanism to rotate, a workpiece table is arranged on the C-axis turntable mechanism, and the workpiece table is used to clamp a workpiece;

[0006] A tool magazine is arranged on the machine frame, and the tool magazine is used to replace the tool head of the main shaft.

[0007] Preferably, the floating loading mechanism includes a slide, the Z-axis moving mechanism is connected to the slide, and drives the slide to rise and fall along the Z-axis direction; a balancing bracket is hinged on the top of the slide, and the balancing bracket can swing left and right on the top of the slide; a left counterweight block and a right counterweight block are respectively hoisted at both ends of the balancing bracket, and a counterweight adjustment assembly is provided on the top; a linear slide rail assembly is provided on the front of the slide, and the left counterweight block can be slidably connected to the linear slide rail assembly; the main shaft is installed on the left counterweight block through the first B-axis turntable mechanism; a rigid locking mechanism is provided at the lower part of the slide, and a pressure sensor is provided at the bottom; the rigid locking mechanism is arranged in cooperation with the left counterweight block, and can lock the left counterweight block on the linear slide rail assembly; the pressure sensor is arranged in cooperation with the left counterweight block.

[0008] Preferably, the linear slide assembly includes a linear constraint guide rail and a constraint block slidably disposed on the linear constraint guide rail, and the constraint block is connected to the left counterweight block; the linear constraint guide rail is any one of a roller linear guide rail, a cylindrical linear guide rail or a ball linear guide rail.

[0009] Preferably, the counterweight adjustment assembly includes a counterweight bracket, on which a screw counterweight unit and a pair of cylinder counterweight units are provided;

[0010] The screw counterweight unit includes a counterweight motor, a screw pair and a first counterweight block, wherein the counterweight motor and the screw pair are mounted on the counterweight bracket, the first counterweight block is mounted on the screw pair, the counterweight motor is in transmission connection with the screw pair, and the first counterweight block is driven to move by the screw pair;

[0011] The cylinder counterweight unit includes a pushing cylinder and a second counterweight block. The pushing cylinder is installed on the counterweight bracket, and the second counterweight block is connected to the piston rod of the pushing cylinder.

[0012] Preferably, the first counterweight block is a structure that can be quickly disassembled or a structure that can increase or decrease the size of the counterweight.

[0013] Preferably, an inner groove is provided on the vertical portion, and the X-axis moving mechanism includes a first mounting seat, a second mounting seat, a first screw rod, a first slider seat, a first motor and a pair of X-axis slide rails; a pair of X-axis slide rails are respectively arranged on the two side walls of the inner groove, and an X-axis slider is provided on the X-axis slide rail; the first mounting seat and the second mounting seat are arranged on the inner groove, the first screw rod is rotatably installed between the first mounting seat and the second mounting seat, and the first slider seat sleeve is arranged on the first screw rod; the first motor is arranged on the first mounting seat, and its output shaft is connected to the first screw rod through a coupling; the X-axis slider and the first slider seat are respectively connected to the Z-axis moving mechanism.

[0014] Preferably, the Z-axis moving mechanism includes a sliding frame, which is a frame structure with a hollow interior; the back of the sliding frame is connected to the X-axis slider; the sliding table is slidably connected to the sliding frame; a second slider seat is provided on the back of the sliding table, a third mounting seat is provided at one end of the sliding frame, and a fourth mounting seat is provided at the other end. A second lead screw is rotatably connected between the third mounting seat and the fourth mounting seat, and the second lead screw is threadedly connected to the second slider seat; a second motor is provided on the fourth mounting seat, and the second motor is drivingly connected to the second lead screw through a coupling.

[0015] Preferably, the Y-axis moving mechanism includes a Y-axis machine table, on which a translation table is slidably provided, and a third slider seat is provided at the bottom of the translation table; a trapezoidal groove is provided on the Y-axis machine table, a fifth mounting seat is provided at one end, and a sixth mounting seat is provided at the other end. A third lead screw is rotatably connected between the fifth mounting seat and the sixth mounting seat, and the third lead screw is threadedly connected to the third slider seat; a third motor is provided on the sixth mounting seat, and the third motor is drivingly connected to the third lead screw through a coupling; the second B-axis turntable mechanism is provided on the top surface of the translation table, and the C-axis turntable mechanism is provided at the output end of the second B-axis turntable mechanism.

[0016] Preferably, a support arm is provided on one side of the vertical portion, and the tool magazine is mounted on the support arm.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: The frame of the present utility model adopts a gantry structure, and the X-axis moving mechanism is arranged on the cross beam of the gantry, reducing the difficulty of protecting the X-axis. The first B-axis turntable mechanism is installed on the Z-axis moving mechanism, and the main shaft is installed on the first B-axis turntable mechanism, realizing the swing of the main shaft at any angle of plus or minus 90 degrees. The weights of the first B-axis turntable mechanism and the main shaft are balanced by the floating loading mechanism, and different force values of floating loading can be achieved through the counterweight adjustment component. In addition, the second B-axis turntable mechanism and the C-axis turntable mechanism are installed on the Y-axis moving mechanism, and the stroke is stable. The design of the present utility model is reasonable and the structure is simple. By adopting a six-axis six-linkage structure, all processes of milling, grinding, and polishing can be realized with one-time clamping of the product. At the same time, a floating loading mechanism is equipped to achieve micro-force loading, and the main shaft moves synchronously with the normal vibration of the machine tool, avoiding surface defects caused by the vibration acceleration of the tool and the product on the main shaft, and greatly improving the machining accuracy and machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural diagram of a six-axis six-linkage milling, grinding, and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0019] Figure 2 Another perspective structure diagram of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0020] Figure 3 Side view of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0021] Figure 4 Structure diagram of the floating loading mechanism of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0022] Figure 5 Another perspective structure diagram of the floating loading mechanism of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0023] Figure 6 Front view of the floating loading mechanism of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0024] Figure 7 Side view of the floating loading mechanism of the six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to an embodiment of the present utility model;

[0025] In Figures 1 to 7 Among them, the corresponding relationship between the names of each component and the drawing reference numbers is as follows:

[0026] 1 - Machine frame, 2 - X-axis moving mechanism, 201 - First mounting seat, 202 - Second mounting seat, 203 - First lead screw, 204 - First slider seat, 205 - First motor, 206 - X-axis slide rail, 207 - X-axis slider, 3 - Z-axis moving mechanism, 301 - Sliding frame, 302 - Second slider seat, 303 - Third mounting seat, 304 - Fourth mounting seat, 305 - Second lead screw, 306 - Second motor, 4 - Floating loading mechanism, 401 - Slide table, 402 - Balance bracket, 403 - Left counterweight, 404 - Right counterweight, 405 - Counterweight adjustment component, 4051 - Counterweight bracket, 4052 - Counterweight motor, 4053 - Lead screw pair, 4054 - First counterweight, 4055 - Pushing cylinder, 4056 - Second counterweight, 406 - Linear slide rail assembly, 407 - Rigid locking mechanism, 5 - First B-axis turntable mechanism, 6 - Spindle, 7 - Y-axis moving mechanism, 701 - Y-axis machine table, 702 - Translation table, 703 - Third slider seat, 704 - Fifth mounting seat, 705 - Sixth mounting seat, 706 - Third lead screw, 707 - Third motor, 8 - Second B-axis turntable mechanism, 9 - C-axis turntable mechanism, 10 - Workpiece table, 11 - Tool magazine, 12 - Support arm. Detailed implementation mode

[0027] The following further describes the implementation mode of the present utility model in detail in conjunction with the attached drawings and embodiments. The attached drawings are only for reference and explanation, and are not used to limit the embodiments of the present disclosure. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0028] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present utility model, 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 utility model can be understood according to specific circumstances.

[0030] Please refer to Figures 1 to 7 , the present utility model provides a six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading, including a machine frame 1. The machine frame 1 has a gantry structure, and the gantry structure includes a vertical part and a horizontal part;

[0031] An X-axis moving mechanism 2 is arranged on the vertical part. A Z-axis moving mechanism 3 is arranged on the X-axis moving mechanism 2. The X-axis moving mechanism 2 is used to drive the Z-axis moving mechanism 3 to move along the X-axis direction; a floating loading mechanism 4 is arranged on the Z-axis moving mechanism 3. The Z-axis moving mechanism 3 is used to drive the floating loading mechanism 4 to move along the Z-axis direction; a first B-axis turntable mechanism 5 is arranged on the floating loading mechanism 4. A main shaft 6 is arranged on the first B-axis turntable mechanism 5. The first B-axis turntable mechanism 5 is used to drive the main shaft 6 to rotate;

[0032] A Y-axis moving mechanism 7 is provided on the horizontal part. A second B-axis turntable mechanism 8 is provided on the Y-axis moving mechanism 7. The Y-axis moving mechanism 7 is used to drive the second B-axis turntable mechanism 8 to move along the Y-axis direction. A C-axis turntable mechanism 9 is provided on the second B-axis turntable mechanism 8. The second B-axis turntable mechanism 8 drives the C-axis turntable mechanism 9 to rotate. A workpiece table 10 is provided on the C-axis turntable mechanism 9. The workpiece table 10 is used to clamp the workpiece.

[0033] A tool magazine 11 is provided on the machine frame 1. The tool magazine is used to replace the tool head of the main shaft 6.

[0034] In the embodiment of the present utility model, a six-axis six-linkage structure is adopted. The machine frame 1 is of a gantry type, and the X-axis moving mechanism 2 is arranged on the cross beam of the gantry, reducing the protection difficulty of the X-axis moving mechanism 2. The Y-axis moving mechanism 7 is arranged below the machine frame 1, and the Z-axis moving mechanism 3 is arranged on the X-axis moving mechanism 2 to achieve movement in three axial directions. Then, a floating loading mechanism 4 is installed on the Z-axis moving mechanism 3. The first B-axis turntable mechanism 5 is installed on the Z-axis moving mechanism 3 through the floating loading mechanism 4, and the main shaft 6 is installed on the first B-axis turntable mechanism 5 to achieve the swing of the main shaft 6 at any angle of plus or minus 90 degrees. The floating loading mechanism 4 adopts a structure similar to a balance. By changing the receiving point on one side of the balance, the rise or fall of the side with the main shaft 6 is achieved. When loading is required, move the heavy weight block on the floating loading mechanism 4 to make the main shaft 6 descend under the action of gravity. The lifting trajectory of the main shaft 6 can be controlled by setting a guide rail. When the set force value is reached, stop moving the heavy weight block on the floating loading mechanism 4, so that the main shaft 6 stays at the preset position, and then the workpiece can be processed. In addition, a second B-axis turntable mechanism 8 and a C-axis turntable mechanism 9 are arranged on the Y-axis moving mechanism 7. Through the movement of the workpiece in two axial directions, six-axis machining of the X-axis, Y-axis, Z-axis, first B-axis, second B-axis, and C-axis is achieved, enabling all processes of milling, grinding, and polishing to be completed with a single clamping of the product. In addition to quickly lifting and lowering the main shaft 6, the floating loading mechanism 4 can also make the main shaft 6 move synchronously with the normal vibration of the machine tool, avoiding surface defects of the tool and the product on the main shaft 6 caused by vibration acceleration, and greatly improving the machining accuracy and machining efficiency.

[0035] This embodiment is equipped with a tool magazine 11 and can automatically change tools. The multi-station model can automatically perform tool setting simultaneously, and each time the tool is fixed at a specific length.

[0036] Preferably, the floating loading mechanism 4 includes a slide table 401. The Z-axis moving mechanism 3 is connected to the slide table 401 and drives the slide table 401 to lift along the Z-axis direction. A balance bracket 402 is hinged to the top of the slide table 401, and the balance bracket 402 can swing left and right on the top of the slide table 401. Left and right counterweights 403 and 404 are respectively suspended at both ends of the balance bracket 402, and a counterweight adjustment assembly 405 is provided at the top. A linear slide rail assembly 406 is provided on the front surface of the slide table 401, and the left counterweight 403 is slidably connected to the linear slide rail assembly 406. The main shaft 6 is installed on the left counterweight 403 through the first B-axis turntable mechanism 5. A rigid locking mechanism 407 is provided at the lower part of the slide table 401, and a pressure sensor is provided at the bottom. The rigid locking mechanism 407 is arranged in cooperation with the left counterweight 403 and can lock the left counterweight 403 on the linear slide rail assembly 406. The pressure sensor is arranged in cooperation with the left counterweight 403.

[0037] In the embodiment of the present invention, the floating loading mechanism 4 adopts a lever balance structure, similar to the structure of a balance. The balance bracket 402 is used as a lever, and the left and right counterweights 403 and 404 are respectively connected by suspension rods at both ends, so that both ends of the balance bracket 402 reach a balanced state, enabling the weight of the main shaft 6 to be completely balanced. When it is necessary to control the main shaft 6 to descend or ascend, only need to start the counterweight adjustment assembly 405, so that the main shaft 6 descends under the action of gravity. The main shaft 6 and the left counterweight 403 are constrained by the linear slide rail assembly 406. When they descend and contact the pressure sensor, after reaching the set force value, stop operating the counterweight adjustment assembly 405. When milling and grinding operations need to be performed, the main shaft 6 can be locked on the slide table 401 through the rigid locking mechanism 407. At this time, the balance bracket 402 does not work. Thus, the arbitrary switching between constant flexible force loading and rigid machining is realized. By adjusting the counterweight assembly 405, the force application point on the right side of the balance bracket 402 is changed, thereby lifting or lowering the main shaft 6. When the main shaft 6 moves to the preset position, the balance bracket 402 re - achieves balance.

[0038] Through the above structural design, one - time clamping of the workpiece can be realized, and all milling, grinding, and polishing processes can be completed, thereby achieving comprehensive performances such as precision, efficiency, yield, automation, intelligence, and environmental protection. Since micro - force loading can be realized, and the loading mechanism can absorb vibration, and it also has the high precision and high reliability of a six - axis numerical control machine tool, using an on - line measurement system, a major breakthrough can be achieved in the one - time clamping and completion of all processes for aspherical mirror surface machining and mirror surface polishing in the optical industry. In addition, the present invention realizes the use of a fixed - abrasive polishing disc, without the need to add free abrasives in the polishing liquid, and only coolant is required to achieve mirror surface polishing, greatly improving the machining precision and machining efficiency, and improving the working environment.

[0039] The constant-force flexible floating loading involved in the present utility model, where the floating involved is floating in the true sense. Without using a force measuring unit and a power execution unit, during grinding and polishing, the tool moves synchronously with the normal vibration of the machine tool, avoiding surface defects of the tool and the product caused by vibration acceleration. The present utility model is applicable to the integrated continuous processing of milling, grinding, and polishing of 3D products made of any material, such as 3C, optics, automotive, crystal glass, medical, jade, furniture, sanitary ware, etc., and has great economic benefits.

[0040] Preferably, the linear slide rail assembly 406 includes a linear constraint guide rail and a constraint block slidably arranged on the linear constraint guide rail, and the constraint block is connected to the left counterweight block 403; the linear constraint guide rail is any one of a roller linear guide rail, a cylindrical linear guide rail, or a ball linear guide rail.

[0041] Preferably, the counterweight adjustment assembly 405 includes a counterweight bracket 4051, and a screw counterweight unit and a pair of cylinder counterweight units are provided on the counterweight bracket 4051;

[0042] The screw counterweight unit includes a counterweight motor 4052, a screw pair 4053, and a first counterweight block 4054. The counterweight motor 4052 and the screw pair 4053 are installed on the counterweight bracket 4051, the first counterweight block 4054 is installed on the screw pair 4053, the counterweight motor 4052 is in transmission connection with the screw pair 4053, and drives the first counterweight block 4054 to move through the screw pair 4053;

[0043] The cylinder counterweight unit includes a push cylinder 4055 and a second counterweight block 4056. The push cylinder 4055 is installed on the counterweight bracket 4051, and the second counterweight block 4056 is connected to the piston rod of the push cylinder 4055.

[0044] In this embodiment, when loading is required, that is, when the main shaft 6 descends to the specified working position, the screw counterweight unit and the cylinder counterweight unit can be started at this time. Specifically, when rapid counterweight is required, the push cylinder 4055 can be controlled to drive the second counterweight block 4056 to translate, so as to change the center of gravity position, causing the counterweights at both ends of the balance bracket 402 as a lever to change, and causing the main shaft 6 to descend. Since the screw counterweight unit uses the screw pair 4053 to control the position of the first counterweight block 4054, its control is more precise and can achieve the loading of a small force. When the screw counterweight unit works, the counterweight motor 4052 is started, and drives the second counterweight block 4056 to move through the screw pair 4053, causing the main shaft 6 to accurately descend to the specified position, and at the same time, the balance bracket 402 is rebalanced.

[0045] Preferably, the first counterweight block 4054 is a structure that can be quickly disassembled or a structure that can increase or decrease the size of the counterweight. The weight of the first counterweight block 4054 is calibrated and determined by an electronic scale according to actual requirements, so that the counterweight motor 4052 can selectively move the first counterweight block 4054 for loading according to the working conditions. To this end, the first counterweight block 4054 can be set to a structure that can be quickly disassembled or a structure that can increase or decrease the size of the counterweight, so as to change different weights.

[0046] Preferably, an inner groove is provided on the vertical portion, and the X-axis moving mechanism 2 includes a first mounting seat 201, a second mounting seat 202, a first screw rod 203, a first slider seat 204, a first motor 205 and a pair of X-axis slide rails 206; a pair of X-axis slide rails 206 are respectively arranged on the two side walls of the inner groove, and an X-axis slider 207 is provided on the X-axis slide rail 206; the first mounting seat 201 and the second mounting seat 202 are arranged on the inner groove, the first screw rod 203 is rotatably installed between the first mounting seat 201 and the second mounting seat 202, and the first slider seat 204 is sleeved on the first screw rod 203; the first motor 205 is arranged on the first mounting seat 201, and its output shaft is connected to the first screw rod 203 through a coupling; the X-axis slider 207 and the first slider seat 204 are respectively connected to the Z-axis moving mechanism 3. Through the above structural design, when the first motor 205 is working, it drives the first slider seat 204 through the first screw rod 203, so that the Z-axis moving mechanism 3 connected to the first slider seat 204 moves along the length direction of the X-axis slide rail 206.

[0047] Preferably, the Z-axis moving mechanism 3 includes a sliding frame 301, which is a frame structure with a hollow interior; the back of the sliding frame 301 is connected to the X-axis slider 207; the slide 401 and the sliding frame 301 can be relatively slidably connected; a second slider seat 302 is provided on the back of the slide 401, a third mounting seat 303 is provided at one end of the sliding frame 301, and a fourth mounting seat 304 is provided at the other end, a second screw rod 305 is rotatably connected between the third mounting seat 303 and the fourth mounting seat 304, and the second screw rod 305 is threadedly connected to the second slider seat 302; a second motor 306 is provided on the fourth mounting seat 304, and the second motor 306 is transmission-connected to the second screw rod 305 through a coupling. Through the above structural design, when the second motor 306 is working, the second slider seat 302 is driven by the second screw rod 305, so that the slide 401 connected to the second slider seat 302 can be lifted and lowered along the length direction of the second screw rod 305.

[0048] Preferably, the Y-axis moving mechanism 7 includes a Y-axis machine table 701, on which a translation table 702 is slidably provided, and a third slider seat 703 is provided at the bottom of the translation table 702; a trapezoidal groove is provided on the Y-axis machine table 701, with a fifth mounting seat 704 at one end and a sixth mounting seat 705 at the other end. A third lead screw 706 is rotatably connected between the fifth mounting seat 704 and the sixth mounting seat 705, and the third lead screw 706 is threadedly connected to the third slider seat 703; a third motor 707 is provided on the sixth mounting seat 705, and the third motor 707 is drivingly connected to the third lead screw 706 through a coupling; the second B-axis turntable mechanism 8 is provided on the top surface of the translation table 702, and the C-axis turntable mechanism 9 is provided on the output end of the second B-axis turntable mechanism 8. Through the above structural design, when the third motor 707 works, it drives the third slider seat 703 through the third lead screw 706, so that the translation table 702 connected to the third slider seat 703 moves along the length direction of the third lead screw 706.

[0049] Preferably, a support arm 12 is provided on one side of the vertical portion, and the tool magazine 11 is mounted on the support arm 12.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows: The frame of the present invention adopts a gantry structure, and the X-axis moving mechanism is arranged on the cross beam of the gantry, reducing the protection difficulty of the X-axis. The first B-axis turntable mechanism is installed on the Z-axis moving mechanism, and the main shaft is installed on the first B-axis turntable mechanism, realizing the swing of the main shaft at any angle of plus or minus 90 degrees. The weights of the first B-axis turntable mechanism and the main shaft are balanced by the floating loading mechanism, and different force values of floating loading can be achieved through the counterweight adjustment component. In addition, the second B-axis turntable mechanism and the C-axis turntable mechanism are installed on the Y-axis moving mechanism, and the stroke is stable. The design of the present invention is reasonable and the structure is simple. By adopting a six-axis six-linkage structure, all processes of milling, grinding, and polishing can be realized with one-time clamping of the product. At the same time, a floating loading mechanism is equipped to achieve micro-force loading, and the main shaft moves synchronously with the normal vibration of the machine tool, avoiding surface defects of the tool and the product on the main shaft due to vibration acceleration, and greatly improving the machining accuracy and machining efficiency.

[0051] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading, characterized in that, It includes a machine frame (1), and the machine frame is in the structure of a gantry, and the gantry structure includes a vertical part and a horizontal part; An X-axis moving mechanism (2) is arranged on the vertical part, a Z-axis moving mechanism (3) is arranged on the X-axis moving mechanism, and the X-axis moving mechanism is used to drive the Z-axis moving mechanism to move along the X-axis direction; a floating loading mechanism (4) is arranged on the Z-axis moving mechanism, and the Z-axis moving mechanism is used to drive the floating loading mechanism to move along the Z-axis direction; a first B-axis turntable mechanism (5) is arranged on the floating loading mechanism, a main shaft (6) is arranged on the first B-axis turntable mechanism, and the first B-axis turntable mechanism is used to drive the main shaft to rotate; A Y-axis moving mechanism (7) is arranged on the horizontal part, a second B-axis turntable mechanism (8) is arranged on the Y-axis moving mechanism, and the Y-axis moving mechanism is used to drive the second B-axis turntable mechanism to move along the Y-axis direction; a C-axis turntable mechanism (9) is arranged on the second B-axis turntable mechanism, the second B-axis turntable mechanism drives the C-axis turntable mechanism to rotate, and a workpiece table (10) is arranged on the C-axis turntable mechanism, and the workpiece table is used to clamp a workpiece; A tool magazine (11) is arranged on the machine frame, and the tool magazine is used to replace the tool head of the main shaft.

2. The six-axis six-linkage milling, grinding and polishing integrated numerically controlled machine tool with floating loading according to claim 1, characterized in that, The floating loading mechanism includes a slide table (401), the Z-axis moving mechanism is connected to the slide table and drives the slide table to lift along the Z-axis direction; a balance bracket (402) is hinged to the top of the slide table, and the balance bracket can swing left and right on the top of the slide table; left and right counterweights (403) and (404) are respectively suspended at both ends of the balance bracket, and a counterweight adjustment assembly (405) is arranged at the top; a linear slide rail assembly (406) is arranged on the front surface of the slide table, and the left counterweight is slidably connected to the linear slide rail assembly; the main shaft is installed on the left counterweight through the first B-axis turntable mechanism; a rigid locking mechanism (407) is arranged at the lower part of the slide table, and a pressure sensor is arranged at the bottom; the rigid locking mechanism is arranged in cooperation with the left counterweight and can lock the left counterweight on the linear slide rail assembly; the pressure sensor is arranged in cooperation with the left counterweight.

3. The six-axis six-linkage milling, grinding and polishing integrated CNC machine tool with floating loading according to claim 2, characterized in that, The linear slide rail assembly includes a linear constraint rail and a constraint block slidably arranged on the linear constraint rail, and the constraint block is connected to the left counterweight; the linear constraint rail is any one of a roller linear rail, a cylindrical linear rail or a ball linear rail.

4. The six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to claim 2, wherein, The counterweight adjustment assembly includes a counterweight bracket (4051), and a screw counterweight unit and a pair of cylinder counterweight units are arranged on the counterweight bracket; The screw counterweight unit includes a counterweight motor (4052), a screw pair (4053) and a first counterweight (4054), the counterweight motor and the screw pair are installed on the counterweight bracket, the first counterweight is installed on the screw pair, the counterweight motor is in transmission connection with the screw pair and drives the first counterweight to move through the screw pair; The cylinder counterweight unit includes a pushing cylinder (4055) and a second counterweight block (4056). The pushing cylinder is installed on the counterweight bracket, and the second counterweight block is connected to the piston rod of the pushing cylinder.

5. The six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to claim 4, wherein The first counterweight block is of a structure that can be quickly disassembled or a structure whose counterweight size can be increased or decreased.

6. The six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to claim 2, wherein An inner groove is provided on the vertical portion. The X-axis moving mechanism includes a first mounting seat (201), a second mounting seat (202), a first lead screw (203), a first slider seat (204), a first motor (205), and a pair of X-axis slide rails (206); the pair of X-axis slide rails are respectively arranged on the two side walls of the inner groove, and X-axis sliders (207) are arranged on the X-axis slide rails; the first mounting seat and the second mounting seat are arranged on the inner groove, the first lead screw is rotatably installed between the first mounting seat and the second mounting seat, and the first slider seat is sleeved on the first lead screw; the first motor is arranged on the first mounting seat, and its output shaft is connected to the first lead screw through a coupling; the X-axis slider and the first slider seat are respectively connected to the Z-axis moving mechanism.

7. The six-axis six-linkage milling, grinding and polishing integrated numerically controlled machine tool with floating loading according to claim 6, wherein, The Z-axis moving mechanism includes a sliding frame (301), and the sliding frame is a frame structure with a hollow interior; the back surface of the sliding frame is connected to the X-axis slider; the sliding table and the sliding frame are slidably connected relative to each other; a second slider seat (302) is provided on the back surface of the sliding table, a third mounting seat (303) is provided at one end of the sliding frame, and a fourth mounting seat (304) is provided at the other end. A second lead screw (305) is rotatably connected between the third mounting seat and the fourth mounting seat, and the second lead screw is threadedly connected to the second slider seat; a second motor (306) is provided on the fourth mounting seat, and the second motor is connected to the second lead screw through a coupling for transmission.

8. The six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to claim 1, wherein, The Y-axis moving mechanism includes a Y-axis machine table (701), a translation table (702) is slidably arranged on the Y-axis machine table, and a third slider seat (703) is provided at the bottom of the translation table; a trapezoidal groove is provided on the Y-axis machine table, a fifth mounting seat (704) is provided at one end, and a sixth mounting seat (705) is provided at the other end. A third lead screw (706) is rotatably connected between the fifth mounting seat and the sixth mounting seat, and the third lead screw is threadedly connected to the third slider seat; a third motor (707) is provided on the sixth mounting seat, and the third motor is connected to the third lead screw through a coupling for transmission; the second B-axis turntable mechanism is arranged on the top surface of the translation table, and the C-axis turntable mechanism is arranged on the output end of the second B-axis turntable mechanism.

9. The six-axis six-linkage milling, grinding and polishing integrated numerical control machine tool with floating loading according to claim 1, wherein A support arm (12) is provided on one side of the vertical portion, and the tool magazine is installed on the support arm.

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