Six-axis numerical control jet flow polishing machine tool

Abstract

A six-axis numerical control jet flow polishing machine tool comprises a base, a four-axis linkage mechanism, a cradle mechanism and a jet flow mechanism. The four-axis linkage mechanism comprises a gantry base installed on the base, a first installation base which is connected to the top of the gantry base in a sliding mode and can move front and back, a second installation base which is connected to the first installation base in a sliding mode and can move left and right, and a third installation base which is connected to the second installation base in a sliding mode and can move up and down. The rotary driving device is mounted on the third mounting seat, and the jet mechanism is mounted on the rotary driving device; the jet mechanism comprises a mounting frame arranged on the rotary driving device, a jet nozzle and a telescopic piece which are arranged on the mounting frame, and a positioning measuring head arranged on the telescopic piece; the cradle mechanism comprises a cradle seat installed on the base, a cradle which is rotatably installed on the cradle seat and can rotate along an A axis, and a rotary table which is rotatably installed on the cradle and can rotate along a C axis. Compared with the prior art, the polishing machine tool is good in polishing quality and high in efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tools, and in particular relates to a six-axis CNC jet polishing machine tool. Background Art

[0002] Currently, the demand for polishing precision mechanical parts with spherical surfaces is growing and demanding. Existing polishing equipment, mostly five-axis, has a limited range of motion, leading to blind spots and multiple clamping times, resulting in low efficiency. Furthermore, prior polishing, existing equipment requires advanced debugging and positioning, which is cumbersome and further reduces processing efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a six-axis CNC jet polishing machine.

[0004] To achieve the above objectives, the present invention discloses a six-axis CNC jet polishing machine tool, comprising a base, a four-axis linkage mechanism and a cradle mechanism provided on the base, and a jet mechanism provided 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 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 fluidic mechanism being mounted on the rotary drive device and driven by the rotary drive device to rotate along axis B;

[0006] The jet mechanism includes a mounting frame, a jet nozzle, a telescopic member, and a positioning probe, wherein the mounting frame is fixedly connected to the rotation drive device, the center line of the mounting frame intersects the B-axis, the jet nozzle is fixedly connected to the mounting frame and is located on the center line of the mounting frame, the telescopic member is fixedly connected to the mounting frame, and the positioning probe is fixedly connected to the telescopic member and can move up and down under the action of the telescopic member;

[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, wherein the turntable is used to fix the product to be processed.

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

[0009] In another embodiment, a metal filter is provided on the reflux tank.

[0010] In one embodiment, the mounting frame is a rectangular frame, the upper and lower ends of the rectangular frame are penetrated and a first opening is provided on the front wall, the top of the first opening extends to the top of the front wall to form a connecting strip of the front wall, the bottom of the first opening penetrates the bottom of the front wall, and the jet nozzle is fixedly connected to the side wall of the rectangular frame.

[0011] In another embodiment, a storage body is provided in the third mounting seat, the top of the storage body passes through the top of the third mounting seat, and the front side of the storage body passes through the middle position of the front side of the third mounting seat.

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

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

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

[0015] The forward and backward moving assembly includes two guide rails, a plurality of sliders respectively arranged on the two guide rails, a motor, and a screw rod; the two guide rails are installed on both sides of the top surface of the gantry seat and are arranged along the front and rear directions, the front ends of the two guide rails are located on the corresponding support platforms, the plurality of sliders are installed on the bottom of the first mounting seat, the motor is installed on the top surface of the gantry seat, and the screw rod is connected to the motor and cooperates with the threaded sleeve.

[0016] In another embodiment, a connecting portion is provided at the rear bottom of the first mounting seat, and a connecting hole is provided in the connecting portion that passes through the front and rear sides thereof, and the threaded sleeve is installed in the connecting hole;

[0017] A second opening is provided at the bottom of the connecting hole.

[0018] In another embodiment, a reflow groove is provided on the top surface of the base at a position 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 fluidic mechanism is detachably connected to the rotary drive device.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The four-axis linkage mechanism (X / Y / Z linear axis + B-axis rotation) can adjust the position and spray angle of the jet nozzle, and the cradle mechanism (A / C-axis rotation) can adjust the position of the product to be processed. The coordinated cooperation of the two mechanisms realizes six-axis linkage, which has a wider processing linkage range and significantly reduces or even avoids processing blind spots. Products can be clamped in sequence to achieve polishing, thereby improving processing efficiency.

[0023] The positioning probe is installed on a retractable telescopic member. After the machine tool is positioned, the telescopic member drives the positioning probe to retract. This not only prevents the positioning probe from interfering with the product and the cradle mechanism, which could damage the positioning probe, but also reduces the adhesion of fine particles to the positioning probe surface during the polishing process, which could affect the positioning effect.

[0024] Polishing is performed using high-pressure liquid ejected from a jet nozzle. Compared to polishing by directly contacting the product to be processed with a polishing device, there are no scratches caused by physical friction, which significantly improves the polishing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the three-dimensional structure of the six-axis CNC jet polishing machine tool of the embodiment;

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

[0027] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the middle mounting frame;

[0028] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the third mounting seat;

[0029] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the six-axis CNC jet polishing machine from another perspective;

[0030] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the first mounting seat;

[0031] Base 100; reflux tank 110;

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

[0033] Cradle mechanism 300; cradle seat 310; cradle 320; turntable 330;

[0034] Fluidic mechanism 400; mounting frame 410; first opening 411; connecting strip 412; threading hole 413; fluidic nozzle 420; telescopic member 430; positioning probe 440;

[0035] Guide rail 510 ; slider 520 ; motor 530 ; screw rod 540 . DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] A six-axis CNC jet polishing machine, see Figure 1 The machine comprises a base 100, a four-axis linkage mechanism 200 and a cradle mechanism 300 mounted on the base 100, and a fluidic mechanism 400 mounted on the four-axis linkage mechanism 200. The cradle mechanism 300 is used to secure the product to be processed and adjust its angle. The four-axis linkage mechanism 200 drives the fluidic mechanism 400 to move, adjusting its position and the spray angle of the high-pressure liquid.

[0038] The four-axis linkage mechanism 200 includes a gantry 210 mounted on the base 100, a first mounting base 220 slidably connected to the top of the gantry 210 and movable forward and backward, a second mounting base 230 slidably connected to the front side of the first mounting base 220 and movable left and right, a third mounting base 240 slidably connected to the front side of the second mounting base 230 and movable up and down, and a rotation drive device 250 (specifically, a graduated turntable) mounted on the third mounting base 240. Figure 2 The fluidic mechanism 400 includes a mounting frame 410, a fluidic nozzle 420, a telescopic member 430, and a positioning probe 440. The mounting frame 410 is fixedly connected to the rotary drive device 250, with the centerline of the mounting frame 410 intersecting the B-axis. The fluidic 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. 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 the surrounding linkage mechanism, the fluidic mechanism 400 can be driven to move forward and backward, left and right, up and down, and rotate about the B-axis.

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

[0040] The above-mentioned machine tool uses high-pressure liquid sprayed from the jet nozzle 420 for polishing. Compared with polishing by directly contacting the product to be processed through a polishing device, there are no scratches caused by physical friction, which significantly improves the polishing quality. The four-axis linkage mechanism 200 (X / Y / Z linear axis + B-axis rotation) can adjust the position and spray angle of the jet nozzle 420, and the cradle mechanism 300 (A / C-axis rotation) can adjust the position of the product to be processed. With the coordinated cooperation of the two mechanisms, six-axis linkage is achieved, the processing linkage range is wider, and the processing blind spots are significantly reduced or even avoided. The products can be polished by clamping them in sequence, thereby improving processing efficiency. The positioning probe 440 is set, and the machine tool can quickly achieve positioning, improve positioning efficiency, and help improve processing efficiency. The positioning probe 440 is installed on the retractable telescopic part 430. After the machine tool is positioned, the telescopic part 430 drives the positioning probe 440 to retract, which not only avoids the positioning probe 440 from interfering with the product and the cradle mechanism 300 and damaging the positioning probe 440, but also reduces the fine particles in the polishing process from adhering to the surface of the positioning probe and affecting the positioning effect.

[0041] In order to further reduce the interference problem of 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 reflow groove 110 is provided on the top surface of the base 100 opposite the cradle 320. During the polishing process, the reflow groove 110 recycles the polishing fluid, improving its utilization and reducing costs. When the cradle 310 rotates, the reflow groove 110 provides a clearance space to prevent interference between the cradle 310 and the base 100.

[0043] In order to improve the reflux effect of the polishing liquid, the mouth of the reflux groove 110 is an inclined plate.

[0044] Furthermore, a metal filter is provided on the reflux tank 110. The metal filter can separate abrasive particles and metal debris that fall out of the polishing liquid, making it easier to clean up later. The plate at the opening of the reflux tank 110 is generally a sheet metal part. If the high-pressure liquid ejected from the jet nozzle 420 hits the sheet metal part, it is easy to damage the sheet metal part. The metal filter is provided. When the high-pressure liquid is ejected toward one side of the reflux tank 110 and hits the metal filter, it avoids directly reaching the sheet metal at the opening of the reflux tank 110 and causing damage to the sheet metal. After being impacted, the metal filter dents downward and deforms to absorb energy, thereby reducing the damage caused by the high-pressure liquid.

[0045] In this embodiment, see Figure 3The mounting frame 410 is a rectangular frame with a first opening 411 extending through the upper and lower ends of the rectangular frame and extending through the front wall. The top of the first opening 411 extends to the top of the front wall to form a connecting strip 412 on the front wall. 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 frame 410 is a hollow structure with low mass, low load on the rotary drive device 250, and improved reliability of the rotary drive device 250. The internal space of the mounting frame 410 can accommodate structures such as wires and waterways, improving the compactness of the structure, while also protecting the wires and waterways and increasing the service life. The bottom of the first opening 411 extends through the bottom of the front wall, which can prevent the jet nozzle 420 from interfering with the mounting frame 410.

[0046] In this embodiment, the telescopic member 430 is a cylinder, but other telescopic cylinders or other telescopic structures may also be used. The sidewalls of the rectangular frame are provided with threading holes 413, through which the circuits and pipes in the mounting frame 410 are connected to the telescopic member 430.

[0047] Depend on Figure 1 It can be seen that the second mounting seat 230, the third mounting seat 240 and the fluidic mechanism 400 are all mounted on the front side of the first mounting seat 220, which will cause the first mounting seat 220 to generate a forward bending moment, affecting both the driving device of the first mounting seat 220 and the position accuracy of the fluidic mechanism 400. The second mounting seat 230 is also subject to a forward bending moment. Figure 4 A chamber 241 is disposed within the third mounting base 240. 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. Furthermore, the chamber 241 within the third mounting base 240 can accommodate the piping of the jet nozzle 420, making the overall structure more compact and having a better appearance.

[0048] Furthermore, weight-reducing holes 242 are provided on the left side wall, right side wall and bottom of the front side wall of the third mounting seat 240. The weight-reducing holes not only further reduce the weight of the third mounting seat 240, but also facilitate the passage of pipelines into and out of the third mounting seat 240.

[0049] Similarly, the second mounting seat 230 is also configured as a central hole structure, but it can only play the role of reducing weight and having a lightweight effect.

[0050] In this embodiment, see Figure 5, a threaded sleeve 224 is provided on the rear side of the first mounting seat 220, and support platforms 225 extend forward on both sides of the top of the gantry seat 210. A forward and backward moving assembly is provided between the gantry seat 210 and the first mounting seat 220. The forward and backward moving assembly includes two guide rails 510, a plurality of sliders 520 respectively provided on the two guide rails 510, a motor 530, and a screw rod 540; the two guide rails 510 are both installed on both sides of the top surface of the gantry seat 210 and arranged along the front and back direction, the front ends of the two guide rails 510 are located on the corresponding support platforms 225, a plurality of sliders 520 are installed on the bottom of the first mounting seat 220, the motor 530 is installed on the rear side of the top surface of the gantry seat 210, and the screw rod 540 is connected to the motor 530 and cooperates with the threaded sleeve 224. Under working conditions, the motor 530 drives the screw rod 540 to rotate, and the screw rod 540 drives the first mounting seat 220 to move forward and backward through the threaded sleeve 224. By providing a support platform 225 on top of the gantry 210, with the front ends of the two guide rails 510 positioned on the corresponding support platforms 225, the first mounting seat 220 has a longer travel range, capable of driving the fluidic mechanism 400 to move directly above or even further forward of the product to be processed, thereby expanding the processing range and facilitating 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 seat 220. This eliminates the need for a longer screw rod 540, resulting in a compact structure. The threaded sleeve 224 located on the rear side of the first mounting seat 220 also balances the torque applied to the front side of the first mounting seat 220, thereby improving the structural stability of the first mounting seat 220.

[0051] For details, see Figure 6 A connecting portion 221 is provided at the rear bottom of the first mounting base 220. A connecting hole 222 is provided in the connecting portion 221, which passes through the front and rear sides thereof. A threaded sleeve 224 is fixed in the connecting hole 222 by a bolt. A second opening 223 is provided at the bottom of the connecting hole 222. 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 portion 221 and the threaded sleeve 224.

[0052] In this embodiment, the second mounting seat 230 and the third mounting seat 240 are also moved left and right and up and down by a screw rod structure.

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

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A six-axis CNC jet polishing machine, characterized by: It comprises a base, a four-axis linkage mechanism and a cradle mechanism arranged on the base, and a fluidic mechanism arranged 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 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 fluidic mechanism being mounted on the rotary drive device and driven by the rotary drive device to rotate along axis B; The jet mechanism includes a mounting frame, a jet nozzle, a telescopic member, and a positioning probe, wherein the mounting frame is fixedly connected to the rotation drive device, the center line of the mounting frame intersects the B-axis, the jet nozzle is fixedly connected to the mounting frame and is located on the center line of the mounting frame, the telescopic member is fixedly connected to the mounting frame, and the positioning probe is fixedly connected to the telescopic member and can move up and down under the action of the telescopic member; 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, wherein the turntable is used to fix the product to be processed.

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

3. The six-axis CNC jet polishing machine according to claim 2, characterized in that: A metal filter is provided on the reflux tank.

4. The six-axis CNC jet polishing machine according to claim 1, characterized in that: The mounting frame is a rectangular frame, the upper and lower ends of the rectangular frame are penetrated and a first opening is provided on the front wall, the top of the first opening extends to the top of the front wall to form a connecting strip of the front wall, the bottom of the first opening penetrates the bottom of the front wall, and the jet nozzle is fixedly connected to the side wall of the rectangular frame.

5. The six-axis CNC jet polishing machine according to claim 1, characterized in that: A storage body is provided in the third mounting seat, the top of the storage body passes through the top of the third mounting seat, and the front side of the storage body passes through the middle position of the front side of the third mounting seat.

6. The six-axis CNC jet polishing machine according to claim 5, characterized in that: The left side wall, the right side wall and the bottom of the front side wall of the third mounting seat are provided with weight-reducing through holes.

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

8. The six-axis CNC jet polishing machine according to claim 7, characterized in that: A connecting portion is provided at the rear bottom of the first mounting seat, and a connecting hole is provided in the connecting portion that passes through the front and rear sides thereof, and the threaded sleeve is installed in the connecting hole; A second opening is provided at the bottom of the connecting hole.

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

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