Six-axis numerical control jet stream polishing machine tool

Abstract

A six-axis CNC jet polishing machine tool includes a base, a four-axis linkage mechanism, a cradle mechanism, and a jet mechanism. The four-axis linkage mechanism includes a gantry mounted on the base, a first mounting seat slidably connected to the top of the gantry and movable forward and backward, a second mounting seat slidably connected to the first mounting seat and movable left and right, a third mounting seat slidably connected to the second mounting seat and movable up and down, and a rotary drive device mounted on the third mounting seat. The jet mechanism is mounted on the rotary drive device. The jet mechanism includes a mounting frame on the rotary drive device, a jet nozzle and a telescopic component on the mounting frame, and a positioning probe on the telescopic component. The cradle mechanism includes a cradle seat mounted on the base, a cradle rotatably mounted on the cradle seat and movable along the A-axis, and a turntable rotatably mounted on the cradle and movable along the C-axis. Compared with the prior art, the polishing machine tool of this utility model has better polishing quality and higher efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool technology, specifically relating to a six-axis CNC jet polishing machine tool. Background Technology

[0002] Currently, the demand for polishing of precision mechanical parts with spherical surfaces is increasing, and the requirements are becoming more stringent. Existing polishing equipment is mostly five-axis, which has a limited range of motion, resulting in blind spots in the machining process. This necessitates multiple clamping operations, leading to low efficiency. Furthermore, existing equipment requires advanced calibration and positioning before polishing, which is cumbersome and further reduces processing efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a six-axis CNC jet polishing machine tool.

[0004] To achieve the above objectives, this utility model discloses a six-axis CNC jet polishing machine tool, including a base, a four-axis linkage mechanism and a cradle mechanism disposed on the base, and a jet mechanism disposed on the four-axis linkage mechanism;

[0005] The four-axis linkage mechanism includes a gantry seat mounted on the base, a first mounting seat slidably connected to the top of the gantry seat and movable back and forth, a second mounting seat slidably connected to the first mounting seat and movable left and right, a third mounting seat slidably connected to the second mounting seat and movable up and down, and a rotary drive device mounted on the third mounting seat. The jet mechanism is mounted on the rotary drive device and is driven by the rotary drive device to rotate along the B-axis.

[0006] The jetting mechanism includes a mounting frame, a jetting nozzle, a telescopic component, and a positioning probe. The mounting frame is fixedly connected to the rotary drive device, and the centerline of the mounting frame intersects with the B-axis. The jetting nozzle is fixedly connected to the mounting frame and located on the centerline of the mounting frame. The telescopic component is fixedly connected to the mounting frame, and the positioning probe is fixedly connected to the telescopic component and can move up and down under the action of the telescopic component.

[0007] The cradle mechanism includes a cradle seat mounted on the base, a cradle rotatably mounted on the cradle seat and rotatable along axis A, and a turntable rotatably mounted on the cradle and rotatable along axis C. The turntable is used to fix the product to be processed.

[0008] In one embodiment, a reflux groove is provided on the top surface of the base opposite to the cradle.

[0009] In another embodiment, the reflux trough is provided with a metal filter screen.

[0010] In one embodiment, the mounting bracket is a rectangular frame with its upper and lower ends extending through it and a first opening on its front wall. The top of the first opening extends above the front wall to form a connecting strip, and the bottom of the first opening extends through the bottom of the front wall. The jet nozzle is fixedly connected to the side wall of the rectangular frame.

[0011] In another embodiment, the third mounting base is provided with a compartment, the top of which extends through the top of the third mounting base, and the front side of which extends through the middle of the front side of the third mounting base.

[0012] In another embodiment, the bottom of the left side wall, right side wall and front side wall of the third mounting base are provided with weight-reducing through holes.

[0013] In another embodiment, a threaded sleeve is provided on the rear side of the first mounting base, and support platforms extend forward from both sides of the top of the gantry base;

[0014] A forward and backward moving component is provided between the gantry and the first mounting base;

[0015] The forward and backward moving assembly includes two guide rails, multiple sliders respectively mounted on the two guide rails, a motor, and a lead screw; the two guide rails are installed on both sides of the top surface of the gantry seat and arranged in the forward and backward direction, the front ends of the two guide rails are located on the corresponding support platform, the multiple sliders are installed on the bottom of the first mounting base, the motor is installed on the top surface of the gantry seat, and the lead screw is connected to the motor and cooperates with the threaded sleeve.

[0016] In another embodiment, the rear bottom of the first mounting base is provided with a connecting part, and the connecting part is provided with a connecting hole that passes through its front and rear sides, and the threaded sleeve is installed in the connecting hole;

[0017] The bottom of the connection hole has a second opening.

[0018] In another embodiment, a reflux groove is provided on the top surface of the base opposite to the cradle.

[0019] In another embodiment, the lowest position of the positioning probe is higher than the lowest position of the jet nozzle.

[0020] In another embodiment, the jet mechanism is detachably connected to the rotary drive device.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] The four-axis linkage mechanism (X / Y / Z linear axes + B-axis rotation) can adjust the position and spray angle of the jet nozzle, while the cradle mechanism (A / C-axis rotation) can adjust the position of the product to be processed. With the cooperation of the two mechanisms, six-axis linkage is achieved, which has a wider processing linkage range, significantly reduces or even avoids processing blind spots, and the products can be polished by clamping them in sequence, thus improving processing efficiency.

[0023] By installing a positioning probe, the machine tool can quickly achieve positioning, improving positioning efficiency and thus improving processing efficiency. The positioning probe is mounted on a retractable extension mechanism. After the machine tool is positioned, the extension mechanism drives the positioning probe to retract. This avoids interference between the positioning probe and the product or cradle mechanism, preventing damage to the positioning probe. It also reduces the adhesion of fine particles from the polishing process to the surface of the positioning probe, thus minimizing the impact on positioning performance.

[0024] Polishing is achieved by using high-pressure liquid ejected from a jet nozzle. Compared to polishing by directly contacting the product with a grinding device, this method eliminates scratches caused by physical friction, significantly improving polishing quality. Attached Figure Description

[0025] Figure 1 A three-dimensional structural schematic diagram of a six-axis CNC jet polishing machine tool as an example;

[0026] Figure 2 for Figure 1 A three-dimensional structural diagram of the jet mechanism;

[0027] Figure 3 for Figure 1 A three-dimensional structural diagram of the mounting bracket;

[0028] Figure 4 for Figure 1 A three-dimensional structural diagram of the third mounting base;

[0029] Figure 5 for Figure 1 A three-dimensional structural diagram of a six-axis CNC jet polishing machine from another perspective;

[0030] Figure 6 for Figure 1 A three-dimensional structural diagram of the first mounting base;

[0031] Base 100; Return channel 110;

[0032] Four-axis linkage mechanism 200; gantry seat 210; first mounting seat 220; connecting part 221; connecting hole 222; second opening 223; threaded sleeve 224; support platform 225; second mounting seat 230; third mounting seat 240; bin body 241; weight reduction through hole 242; rotary drive device 250;

[0033] Cradle mechanism 300; Cradle seat 310; Cradle 320; Turntable 330;

[0034] Jet mechanism 400; mounting bracket 410; first opening 411; connecting strip 412; wire hole 413; jet nozzle 420; telescopic component 430; positioning probe 440;

[0035] Guide rail 510; slider 520; motor 530; lead screw 540. Detailed Implementation

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] A six-axis CNC jet polishing machine tool, see [link / reference] Figure 1 The system includes a base 100, a four-axis linkage mechanism 200 and a cradle mechanism 300 mounted on the base 100, and a jetting mechanism 400 mounted on the four-axis linkage mechanism 200. The cradle mechanism 300 is used to fix the product to be processed and can also adjust the angle of the product. The four-axis linkage mechanism 200 drives the jetting mechanism 400 to move, adjusting the position of the jetting mechanism 400 and the spray angle of the high-pressure liquid.

[0038] The four-axis linkage mechanism 200 includes a gantry seat 210 mounted on the base 100, a first mounting seat 220 slidably connected to the top of the gantry seat 210 and movable back and forth, a second mounting seat 230 slidably connected to the front side of the first mounting seat 220 and movable left and right, a third mounting seat 240 slidably connected to the front side of the second mounting seat 230 and movable up and down, and a rotary drive device 250 (specifically an indexing turntable) mounted on the third mounting seat 240. See also... Figure 2 The jetting mechanism 400 includes a mounting frame 410, a jetting nozzle 420, a telescopic member 430, and a positioning probe 440. The mounting frame 410 is fixedly connected to the rotary drive device 250, and the centerline of the mounting frame 410 intersects the B-axis. The jetting nozzle 420 is fixedly connected to the mounting frame 410 and located on the centerline of the mounting frame 410. The telescopic member 430 is fixedly connected to the mounting frame 410, and the positioning probe 440 is fixedly connected to the telescopic member 430 and can move up and down under the action of the telescopic member 430. Through a four-way linkage mechanism, the jetting mechanism 400 can be driven to move back and forth, left and right, up and down, and rotate around the B-axis.

[0039] The cradle mechanism 300 includes a cradle seat 310 mounted on the base 100, a cradle 320 rotatably mounted on the cradle seat 310 and rotatable along the A-axis, and a turntable 330 rotatably mounted on the cradle 320 and rotatable along the C-axis. The turntable 330 is used to fix the product to be processed.

[0040] The aforementioned machine tool uses high-pressure liquid ejected from a jet nozzle 420 for polishing. Compared to polishing by directly contacting the workpiece with a grinding device, this eliminates scratches caused by physical friction, significantly improving polishing quality. The four-axis linkage mechanism 200 (X / Y / Z linear axes + B-axis rotation) adjusts the position and spray angle of the jet nozzle 420, while the cradle mechanism 300 (A / C-axis rotation) adjusts the position of the workpiece. The coordinated operation of these two mechanisms achieves six-axis linkage, resulting in a wider processing range and significantly reducing or even eliminating blind spots. Products can be polished simply by being clamped sequentially, improving processing efficiency. The inclusion of a positioning probe 440 enables rapid positioning, enhancing positioning efficiency and further improving overall processing efficiency. The positioning probe 440 is mounted on the telescopic component 430. After the machine tool is positioned, the telescopic component 430 drives the positioning probe 440 to retract, which avoids interference between the positioning probe 440 and the product or the cradle mechanism 300, thus preventing damage to the positioning probe 440. It also reduces the adhesion of fine particles on the surface of the positioning probe during the polishing process, thus affecting the positioning effect.

[0041] To further reduce interference issues with the positioning probe 440, the lowest position of the positioning probe 440 is higher than the lowest position of the jet nozzle.

[0042] In this embodiment, a return channel 110 is provided on the top surface of the base 100 opposite to the cradle 320. During the polishing process, the return channel 110 can recover the polishing liquid, improve the utilization rate of the polishing liquid, and reduce costs; when the cradle seat 310 rotates, the return channel 110 provides a clearance space to avoid interference between the cradle seat 310 and the base 100.

[0043] In order to improve the reflux effect of polishing fluid, the opening of the reflux tank 110 is an inclined plate.

[0044] Furthermore, a metal filter screen is provided on the return tank 110. The metal filter screen can separate abrasive particles and metal debris that fall off in the polishing fluid, facilitating subsequent cleaning. The plate at the opening of the return tank 110 is generally a sheet metal part. If the high-pressure liquid sprayed from the jet nozzle 420 hits the sheet metal part, it can easily cause damage. The metal filter screen is installed so that when the high-pressure liquid is sprayed towards one side of the return tank 110, it bounces back onto the metal filter screen, avoiding direct contact with the sheet metal at the opening of the return tank 110 and thus preventing damage to the sheet metal. After being impacted, the metal filter screen deforms downwards and absorbs energy, thereby reducing the damage caused by the high-pressure liquid.

[0045] In this embodiment, see Figure 3The mounting bracket 410 is a rectangular frame with its top and bottom ends extending through it. A first opening 411 is provided on the front wall, with the top of the first opening 411 extending to the top of the front wall to form a connecting strip 412. The bottom of the first opening 411 extends through the bottom of the front wall. The jet nozzle 420 is fixedly connected to the front side of the rear wall of the rectangular frame. The mounting bracket 410 has a hollow structure, resulting in low weight and a low load on the rotary drive device 250, thus improving the reliability of the rotary drive device 250. The internal space of the mounting bracket 410 can accommodate wires, water pipes, and other structures, improving structural compactness and protecting the wires and water pipes, extending their service life. The bottom of the first opening 411 extends through the bottom of the front wall, preventing interference between the jet nozzle 420 and the mounting bracket 410.

[0046] In this embodiment, the telescopic component 430 is a cylinder, but other telescopic cylinders or other telescopic structures can also be used. The side wall of the rectangular frame is provided with a wire hole 413, and the wiring conduit in the mounting bracket 410 is connected to the telescopic component 430 through the wire hole 413.

[0047] Depend on Figure 1 It is known that the second mounting base 230, the third mounting base 240, and the jet mechanism 400 are all mounted on the front side of the first mounting base 220. This will cause a forward bending moment in the first mounting base 220, affecting both the drive mechanism of the first mounting base 220 and the positional accuracy of the jet mechanism 400. The second mounting base 230 is also subjected to a forward bending moment. See [link / reference] Figure 4 The third mounting base 240 contains a chamber 241. The top of the chamber 241 extends through the top of the third mounting base 240, and the front of the chamber 241 extends through the middle of the front side of the third mounting base 240. The third mounting base 240 is designed as a hollow structure to reduce the impact of excessive weight on structural reliability and machining accuracy. In addition, the chamber 241 inside the third mounting base 240 can accommodate the piping of the jet nozzle 420, making the overall structure more compact and giving it a better appearance.

[0048] Furthermore, the bottom of the left side wall, right side wall and front side wall of the third mounting base 240 is provided with weight reduction through holes 242. The weight reduction holes not only further reduce the weight of the third mounting base 240, but also facilitate the insertion and exit of pipelines into and out of the third mounting base 240.

[0049] Similarly, the second mounting base 230 is also designed with a central hole structure, but it can only reduce weight and achieve a lightweight effect.

[0050] In this embodiment, see Figure 5A threaded sleeve 224 is provided on the rear side of the first mounting base 220, and support platforms 225 extend forward from both sides of the top of the gantry base 210. A front-to-back moving assembly is provided between the gantry base 210 and the first mounting base 220. The front-to-back moving assembly includes two guide rails 510, multiple sliders 520 respectively mounted on the two guide rails 510, a motor 530, and a lead screw 540; the two guide rails 510 are mounted on both sides of the top surface of the gantry base 210 and arranged in the front-to-back direction, with the front ends of the two guide rails 510 located on the corresponding support platforms 225; the multiple sliders 520 are mounted on the bottom of the first mounting base 220; the motor 530 is mounted on the rear side of the top surface of the gantry base 210; and the lead screw 540 is connected to the motor 530 and cooperates with the threaded sleeve 224. In operation, the motor 530 drives the lead screw 540 to rotate, and the lead screw 540 drives the first mounting base 220 to move back and forth through the threaded sleeve 224. By setting a support platform 225 on the top of the gantry 210, and with the front ends of the two guide rails 510 located on the corresponding support platform 225, the first mounting base 220 has a longer travel distance, which can drive the jet mechanism 400 to move to a position directly above or even further forward of the product to be processed, resulting in a wider processing range and easier processing. The motor 530 is mounted on the rear side of the top surface of the gantry 210, and the threaded sleeve 224 is located on the rear side of the first mounting base 220, so the length of the lead screw 540 does not need to be too long, resulting in a compact structure; the threaded sleeve 224 located on the rear side of the first mounting base 220 can also balance the torque on the front side of the first mounting base 220, improving the structural stability of the first mounting base 220.

[0051] For details, see Figure 6 The first mounting base 220 has a connecting part 221 at its rear bottom. The connecting part 221 has a connecting hole 222 that extends through its front and rear sides. The threaded sleeve 224 is fixed in the connecting hole 222 by bolts. The bottom of the connecting hole 222 has a second opening 223. Preferably, the central angle of the second opening 223 is less than 90 degrees, which can ensure the reliability of the connection between the connecting part 221 and the threaded sleeve 224.

[0052] In this embodiment, the second mounting base 230 and the third mounting base 240 also move left and right and up and down through a screw structure.

[0053] In this embodiment, the jetting mechanism 400 is detachably connected to the rotary drive device 250. When cutting is required, the jetting mechanism 400 can be removed and the cutting tool can be replaced. The machine tool can simultaneously perform polishing and cutting functions, and has strong versatility.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A six-axis CNC jet polishing machine tool, characterized in that: It includes a base, a four-axis linkage mechanism and a cradle mechanism disposed on the base, and a jet mechanism disposed on the four-axis linkage mechanism; The four-axis linkage mechanism includes a gantry seat mounted on the base, a first mounting seat slidably connected to the top of the gantry seat and movable back and forth, a second mounting seat slidably connected to the first mounting seat and movable left and right, a third mounting seat slidably connected to the second mounting seat and movable up and down, and a rotary drive device mounted on the third mounting seat. The jet mechanism is mounted on the rotary drive device and is driven by the rotary drive device to rotate along the B-axis. The jetting mechanism includes a mounting frame, a jetting nozzle, a telescopic component, and a positioning probe. The mounting frame is fixedly connected to the rotary drive device, and the centerline of the mounting frame intersects with the B-axis. The jetting nozzle is fixedly connected to the mounting frame and located on the centerline of the mounting frame. The telescopic component is fixedly connected to the mounting frame, and the positioning probe is fixedly connected to the telescopic component and can move up and down under the action of the telescopic component. The cradle mechanism includes a cradle seat mounted on the base, a cradle rotatably mounted on the cradle seat and rotatable along axis A, and a turntable rotatably mounted on the cradle and rotatable along axis C. The turntable is used to fix the product to be processed.

2. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The top surface of the base is provided with a reflux groove at a position opposite to the cradle.

3. The six-axis CNC jet polishing machine tool according to claim 2, characterized in that: The reflux trough is equipped with a metal filter screen.

4. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The mounting bracket is a rectangular frame with its top and bottom ends extending through it and a first opening on its front wall. The top of the first opening extends to the top of the front wall, forming a connecting strip. The bottom of the first opening extends through the bottom of the front wall. The jet nozzle is fixedly connected to the side wall of the rectangular frame.

5. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The third mounting base is provided with a compartment, the top of which extends through the top of the third mounting base, and the front side of which extends through the middle of the front side of the third mounting base.

6. The six-axis CNC jet polishing machine tool according to claim 5, characterized in that: The third mounting base has weight-reducing through holes at the bottom of its left side wall, right side wall, and front side wall.

7. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The first mounting base is provided with a threaded sleeve on its rear side, and the top two sides of the gantry base extend forward to form support platforms; A forward and backward moving component is provided between the gantry and the first mounting base; The forward and backward moving assembly includes two guide rails, multiple sliders respectively mounted on the two guide rails, a motor, and a lead screw; the two guide rails are installed on both sides of the top surface of the gantry seat and arranged in the forward and backward direction, the front ends of the two guide rails are located on the corresponding support platform, the multiple sliders are installed on the bottom of the first mounting base, the motor is installed on the top surface of the gantry seat, and the lead screw is connected to the motor and cooperates with the threaded sleeve.

8. The six-axis CNC jet polishing machine tool according to claim 7, characterized in that: The first mounting base has a connecting part at the bottom rear side, and the connecting part has a connecting hole that passes through its front and rear sides. The threaded sleeve is installed in the connecting hole. The bottom of the connection hole has a second opening.

9. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The lowest position of the positioning probe is higher than the lowest position of the jet nozzle.

10. The six-axis CNC jet polishing machine tool according to claim 1, characterized in that: The jetting mechanism is detachably connected to the rotary drive device.

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