NL2032480B1

NL2032480B1 - Abrasive water jet flexible intelligent six-axis cutting platform 3d curved surface cutting process

Info

Publication number: NL2032480B1
Application number: NL2032480A
Authority: NL
Inventors: Yang Fanchao
Original assignee: Jiangsu Huazhen Aviation Tech Co Ltd
Priority date: 2022-01-05
Filing date: 2022-07-13
Publication date: 2023-07-10
Also published as: CN114310677A

Abstract

The present invention relates to an abrasive water jet ﬂexible intelligent siX-aXis cutting platform 3D curved surface cutting process, comprising: Sl. mounting a workpiece to 5 be cut, and selecting an abrasive material; S2. loading an abrasive into an abrasive tank, delivering compressed air to the abrasive tank, and delivering the abrasive to a metering abrasive quantitative feeding tank via an abrasive pipe to achieve dynamic balance and temporary storage, S3. starting a high-pressure water generating component, after the high-pressure pump runs to reach a predetermined cutting pressure, the high-pressure 10 water forming a high-speed jet and forming a negative pressure at the sand suction pipe of the abrasive jet spray head body, opening the abrasive switch valve, the abrasive entering the sand suction pipe and mixing with the high-speed jet to form an abrasive water jet.

Description

ABRASIVE WATER JET FLEXIBLE INTELLIGENT SIX-AXIS CUTTING

PLATFORM 3D CURVED SURFACE CUTTING PROCESS

TECHNICAL FIELD

[OI] The present invention is in the technical field of abrasive water jet cutting processes, and relates to an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process.

BACKGROUND ART

[02] At present, the multi-axis water jet cutting device at home and abroad is generally 5-axis 5-linkage high-end water cutting device and 6-axis industrial robot plus the seven extended-axis rotary workbench, and a five-axis water jet knife linearly moving axis X, Y and Z and rotating axis A and B. The 5-axis water jet have advantages that: parts with taper and swing angle can be cut; and have the disadvantages that the cutting pendulum angle is small, the cutting angle of some complex parts is not enough or there is a dead angle, and the cutting point of 3D surface cannot be reached; at present, there are also water jet cutting devices using industrial robots, which are divided into pure water jet cutting and abrasive water jet cutting. The characteristics of pure water jet cutting device are as follows: an abrasive supply system is not provided, the cutting pressure is generally about 200 MPa, most of which are used to cut non-metallic materials (such as automobile interior decoration); abrasive water jet cutting is used to cut metal parts. The current industrial robot abrasive water jet cutting device is difficult to ensure the concentricity and verticality of the nozzle and the system during mounting due to the complicated design of a nozzle mounting bracket and the large accumulated machining error. Therefore, the consistency of nozzle mounting and design precision cannot be guaranteed. In addition, due to the limited rigidity of the industrial robot, the precision of the cut parts is low, and even the waste products appear.

In the existing industrial robot water jet cutting device, due to the design and processing defects of the rotary table, the servo motor and speed reducer are two-body structure,

there is a great error in mounting, which greatly affects the cutting precision. In addition, the seal of the rotary table is directly exposed to the sediment, and the seal failure often occurs. Therefore, in summary, the current device, industrial robot 7-axis cutting device, for the mounting and positioning of the workpiece is very difficult, and it is easy to have the problems of poor positioning precision and low production efficiency. Rotary seals are prone to failure, and for 3D curved surface cutting, poor method and safety of parts, five-axis cutting devices, it is difficult to achieve complex 3D curved surface components and parts cutting due to smaller swing angle.

[03] For the above reasons, the current water jet 3D curved surface forming and cutting process also has the following problems and disadvantages, which need to be ameliorated and improved:

[04] 1. acomplex spray head bracket is adopted for the nozzle, the accumulated error is great in the process and mounting, and the effective positioning measures for high-pressure pipeline are absent, so it is difficult to ensure the mounting precision and processing precision;

[05] 2. the design and machining of underwater servo rotary table has defects, the servo motor and speed reducer are two-body structure, there is a large random error in mounting, which greatly affects the cutting precision;

[06] 3. the mechanical sealing device of the underwater servo rotary workbench is directly immersed and exposed in the inclement water sand slurry after cutting. Because the sediment directly enters the sealing surface, it is easy to wear the sealing surface, so the failure of the rotary seal often occurs, which causes the failure of the rotary workbench;

[07] 4. in the structure of rotary axis and bearing assembly, there is no leakage safety drainage protection function, and once the above-mentioned seal fails to leak for a short time, sewage sludge and sand are easily accumulated at the rotary axis and bearing, resulting in the failure of rotary axis and bearing system.

SUMMARY

[08] The present invention provides an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process in view of the above-mentioned problems, which can achieve efficient and high-precision processing of complex 3D spatial curved surfaces.

[09] The technical solution of the present invention is:

[10] an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the following steps are included:

[11] S1. mounting a workpiece to be cut, detecting the positioning precision, and selecting an abrasive for cutting with a suitable granularity and hardness according to the material properties of the workpiece to be cut;

[12] S2. loading the abrasive of step S1 into an abrasive tank of an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, delivering compressed air to the abrasive tank, and transferring the abrasive from the abrasive tank to a metering abrasive quantitative feeding tank via an abrasive pipe to achieve dynamic balance and temporary storage;

[13] S3. selecting a running program of the spray head assembly via a control panel, a water-proof servo rotary workbench and the spray head assembly performing six-axis linkage when cutting a curved surface, starting the high-pressure water generating component, adjusting the required pressure to reach a predetermined pressure, after the high-pressure pump of the high-pressure water generating component runs to reach the predetermined cutting pressure, after opening the high-pressure water switch valve, forming, by the high-pressure water, a high-speed jet through the high-pressure water nozzle, and forming a negative pressure at the sand suction pipe of the abrasive jet spray head body, wherein the running program automatically opens the abrasive switch valve, the abrasive will enter the sand suction pipe driven by the vacuum airflow, and mix with the high-speed jet to form an abrasive water jet with a cutting ability;

[14] S4. starting to execute a cutting program of the spray head assembly, the abrasive water jet cutting the workpiece to be cut according to a pre-set program, and during the cutting process, the abrasive in the abrasive tank will continue to supplement the abrasive quantitative feeding tank under the action of the compressed air;

[15] S5. after the cutting is completed, automatically turning off, by the cutting program control system, the abrasive and water switch, finally turning off the high-pressure water generating component, turning off the machine, and completing the predetermined cutting procedure.

[16] Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the abrasive in step SI is brown corundum, white corundum or garnet, the abrasive granularity is 40-100 mesh, and the abrasive hardness is 6.7-7.5.

[17] Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the compressed air is delivered to the abrasive tank in step S2 so that the abrasive tank is filled with 0.2 to 0.4 Mpa of compressed air.

[18] Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: in the step S3, the high-pressure water generating component (2) uses a hydraulic double-acting supercharger, and the high-pressure water generating component (2) has a predetermined cutting pressure of 360-600 MPa and a flow rate of 3-5 L/min.

[19] Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the cutting speed of the workpiece to be cut by the abrasive water jet in the step S4 1s 20-160 mm/min.

[20] The technical effect of the present invention is as follows:

[21] (1) the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of the present invention organically combines an intelligent six-axis working platform with an underwater servo rotary workbench to provide an abrasive water jet cutting process technology of flexible intelligent six-axis linkage 3D curved surface cutting, so that 3D curved surface forming processing of an aeroengine integral blade disc can be realized, the cutting effect of high-precision linear curved surface cutting forming can be achieved, and an efficient, green and low-cost processing process of an aeroengine integral blade disc can be realized.

[22] (2) The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of the present invention can achieve efficient and high-precision cutting of complex 3D spatial curved surfaces. 5

BRIEF DESCRIPTION OF THE DRAWINGS

[23] Fig. 11s a schematic structural diagram of Embodiment 2.

[24] Fig. 2 is a schematic view of the cutting platform assembly of Embodiment 2.

[25] Fig. 3 is a schematic view showing the structure of the water-proof rotary workbench in Embodiment 2.

[26] Fig. 41s a schematic view showing the construction of a spray head assembly in

Embodiment 2.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[27] Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[28] Embodiment 1

[29] an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the following steps are included:

[30] S1. mounting a workpiece to be cut, detecting the positioning precision, and selecting an abrasive for cutting with a suitable granularity and hardness according to the material properties of the workpiece to be cut, wherein the abrasive is brown corundum, white corundum or garnet, the granularity of the abrasive is 40-100 mesh, and the hardness of the abrasive is 6.7-7.5; [BI] S2. loading the abrasive of step SI into an abrasive tank 4 of an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, starting the abrasive delivering compressed air, so that the abrasive tank 4 is filled with 0.2-0.4 Mpa of compressed air, and delivering the abrasive from the abrasive tank 4 to the metering abrasive quantitative feeding tank 6 via the abrasive pipe 5 to achieve dynamic balance and temporary storage;

[32] S3. selecting a running program of the spray head assembly 8 via a control panel 9, the water-proof servo rotary workbench 11 and the spray head assembly 8 being arranged in a six-axis linkage when performing curved surface cutting to start the high-pressure water generating component 2, wherein the high-pressure water generating component 2 uses a hydraulic double-acting supercharger, the rated cutting pressure generated by the high-pressure water generating component 2 is 360-600 MPa, the flow rate is 3-5 L/min, and the required pressure is adjusted to reach a predetermined pressure, wherein the high-pressure water generating component comprises a high-pressure pump, an electric motor, a pipeline and a hydraulic pump, and after the high-pressure pump runs to reach the pre-set cutting pressure, the high-pressure water switch valve 42 is opened, the high-pressure water passes through the high-pressure water nozzle 43 to form a high-speed jet, and forms a negative pressure at the sand suction pipe of the abrasive jet spray head body 41, and the operation program automatically opens the abrasive switch valve, so that the abrasive will enter the sand suction pipe driven by the vacuum airflow, and mix with the high-speed jet to form an abrasive water jet with a cutting ability;

[33] S4. starting to execute a cutting program of the spray head assembly 8, the abrasive water jet cutting the workpiece to be cut according to a pre-set program, wherein the cutting speed of the workpiece to be cut is 20-160 mm/min, and during the cutting process, the abrasive in the abrasive tank 4 continuously supplements the abrasive quantitative feeding tank 6 under the action of the compressed air;

[34] S5. after the cutting is completed, automatically turning off, by the cutting program control system, the abrasive and water switch, finally turning off the high-pressure water generating component, turning off the machine, and completing the predetermined cutting procedure.

[35] Embodiment 2

[36] The present embodiment provides an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, as shown in Figs. 1-4. In

Figs. 1-4, the device comprises a housing 1, a high-pressure water generating component 2, a high-pressure pipeline 3, an abrasive tank 4, an abrasive pipe 5, an abrasive quantitative feeding tank 6, a cutting platform assembly 7, an X bracket 7-1, an axis Y ball screw 7-2, an axis Z ball screw rod 7-3, a rotary axis A 7-4, a rotary axis B 7-5, a spray head assembly 8, a control panel 9, a water collection tank 10, a water-proof rotary workbench 11, a reduction motor 14, a support base 15, a rotary axis 16, an upper bearing seat 17, a self-aligning roller bearing 18, a sealing assembly 19, a labyrinth dust-proof sealing ring 20, a workpiece mounting table 21, a compression nut 22, a sand-proof maintenance cover 23, a thrust roller bearing 24, a protective cover 25, a diversion hole 26, a rotary axis A joint 38, a rotary axis B spray head bracket 39, a dynamic balance spray head bracket 40, an abrasive jet spray head body 41, a high-pressure water switch valve 42, a high-pressure water nozzle 43, a sand mixing chamber 44, an abrasive spray pipe 45, etc.

[37] As shown in Figs. 1-4, the present invention relates to an abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device comprising a platform base 34, wherein a water collection tank 10 is arranged at the bottom of the platform base 34, a water-proof rotary workbench 11 is rotatably arranged on the platform base 34, a cutting platform assembly 7 cooperating with the water-proof rotary workbench 11 is further fixed on the platform base 34, and a spray head assembly 8is mounted on an actuating end of the cutting platform assembly 7.

[38] An abrasive tank 4 is provided outside the platform base 34 to supply abrasive to the spray head assembly 8, a bottom discharge port of the abrasive tank 4 is connected to a feeding port of the spray head assembly 8 in a sealed manner via an abrasive pipe 5, and an abrasive quantitative feeding tank 6 is provided on the abrasive pipe 5. In operation, the abrasive material is delivered by means of compressed air conveyance and dynamic balance automatic sand feeding, and the abrasive material for cutting is press-delivered to the quantitative feeding tank 6 by compressed air via the abrasive tank 4.

[39] A water inlet end of the spray head assembly 8 is connected to the high-pressure water generating component 2 via a high-pressure pipeline 3. The high-pressure water generating component 2 uses a hydraulic double-acting supercharger to amplify the hydraulic oil pressure to the required cutting pressure, and the rated pressure generated by the high-pressure water generating component 2 is 360-600 MPa and the flow rate is 3-5 L/min.

[40] The spray head assembly 8 comprises a dynamic balance spray head bracket 40, a high-pressure water spray nozzle 43 is mounted on the dynamic balance spray head bracket 40, a high-pressure water switch valve 42 is provided at the water inlet end of the high-pressure water spray nozzle 43, the water inlet port of the high-pressure water switch valve 42 is connected in a sealed manner to the high-pressure pipeline 3, an abrasive jet spray head body 41 is provided at the water outlet end of the high-pressure water spray nozzle 43, the abrasive jet spray head body 41 is provided with a sand mixing chamber 44, an abrasive spray pipe 45 is provided at the outlet end of the sand mixing chamber 44, and the abrasive jet spray head body 41 is connected to the abrasive pipe 5.

[41] In operation, the high-pressure water generating component 2 supplies 400 Mpa of ultra-high pressure, and is delivered to the spray head assembly 8 via the high-pressure pipeline 3; after the pressure water passes through the high-pressure water nozzle 43, a high-speed water jet is formed, and the high-speed water jet forms a negative pressure in the cavity of the sand mixing chamber 44; the abrasive in the feeding tank 6 is sucked into the sand mixing chamber 44, and is accelerated via the abrasive spray pipe 45 of cemented carbide to form a high-speed abrasive water jet for abrasive water cutting.

[42] A housing 1 is provided on the platform base 34, the cutting platform assembly 7 and the water-proof rotary workbench 11 are all placed in the housing 1, and a control panel 9 is provided on the housing 1. In particular practice, a mist arrester is provided at the top of the housing 1, and the mist suction port of the mist arrester is provided above the station of the abrasive spray pipe 45.

[43] As shown in Fig. 2, the cutting platform assembly 7 comprises two groups of X brackets 7-1, wherein the two groups of X brackets 7-1 are both supported on the platform base 34, an axis X bracket 35 is respectively provided at the top end of each group of the X brackets 7-1, an axis X ball screw rod is provided at the inner side surface of the axis X bracket 35, a screw nut seat of the axis X ball screw rod is fixedly connected to an axis Y bracket 36, an axis Y ball screw rod 7-2 is provided at the side surface of the axis Y bracket 36, an axis Z bracket 37 is fixedly connected to a screw nut seat of the axis Y ball screw rod 7-2, and an axis Z ball screw rod 7-3 is provided at the side surface of the axis Z bracket 37. The screw nut seat of the axis Z ball screw 7-3 is fixedly connected to a rotary axis A joint 38, a rotary axis A 7-4 is rotatably provided on the rotary axis A joint 38, a rotary axis B spray head bracket 39 is provided on a side face of the rotary axis A joint 38, the rotary axis A 7-4 is fixedly connected to the rotary axis B spray head bracket 39, and the rotary axis B 7-5 is rotatably provided on the rotary axis B spray head bracket 39; rotation axis B 7-5 drives rotation of the spray head assembly 8.

[44] It can be understood that in order to process a workpiece in a six-axis direction during operation, an axis X ball screw rod is provided on an inner side surface of the axis X bracket 35, a screw nut seat of the axis X ball screw rod is fixedly connected to the axis Y bracket 36, and the axis X ball screw rod drives the axis Y bracket 36 to move in the axis X direction; the axis Y ball screw 7-2 provided on the side of the axis

Y bracket 36 is a screw axis, the screw nut seat on the axis Y ball screw 7-2 drives the axis Z bracket 37 to carry out reciprocating movement in the axis Y direction, and the axis Z ball screw 7-3 is a screw axis, and the axis X ball screw, the axis Y ball screw 7-2 and the axis Z ball screw 7-3 are respectively driven to rotate by a corresponding drive motor; the screw nut seat of the axis Z ball screw 7-3 drives the rotary axis A joint 38 to carry out lifting movement, the rotary axis A 7-4 is driven by a corresponding drive motor to carry out rotary movement, the rotary axis A 7-4 drives the rotary axis B spray head bracket 39 to rotate, the rotary axis B spray head bracket 39 is rotatably provided with a rotary axis B 7-5, and the rotary axis B 7-5 is driven by a corresponding drive motor to rotate. In order to achieve reliable guiding during operation, the axis X bracket

35 is fitted with an axis X guide rod, and the corresponding screw nut seat is also slidably fitted with the axis X guide rod while being in threaded connection with the axis X ball lead screw; the axis Y bracket is fitted with an axis Y guide rod, and the corresponding screw nut seat is also slidably fitted with the axis Y guide rod while being in threaded connection with the axis Y ball screw rod; the axis Z bracket 37 is fitted with an axis Z guide rod, and the corresponding screw nut seat is also slidably fitted with the axis Z guide rod while being in threaded connection with the axis Z ball screw rod.

[45] As shown in Fig. 3, the water-proof rotary workbench 11 comprises a reduction motor 14, a support base 15, a rotary axis 16, a bearing seat 17, a self-aligning roller bearing 18, a sealing assembly 19, a labyrinth dust-proof sealing ring 20, a workpiece mounting table 21, a compression nut 22, a sand-proof maintenance cover 23, a thrust roller bearing 24, a protective cover 25, and a diversion hole 26. In practice, the power of the reduction motor 14 is 3.75 KW, the rated torque of the high-ratio planetary gearbox in the reduction motor 14 is 3100 Nm and the reduction ratio is 118.5.

[46] The support base 15 is mounted on the platform base 34, the reduction motor 14 is mounted on the support base 15, the output axis of the reduction motor 14 is fixedly connected to the rotary axis 16, the upper part of the support base 15 constitutes a lower bearing seat, the top of the lower bearing seat is fixedly connected to the upper bearing seat 17, the thrust roller bearing 24 is mounted on the lower bearing seat, the self-aligning roller bearing 18 is mounted on the upper bearing seat 17, the rotary axis 16 is successively matched with the thrust roller bearing 24 and the self-aligning roller bearing 18, and the upper end of the rotary axis 16 is fixedly connected to the workpiece mounting table 21.

[47] The outer side cover of the support base 15 1s provided with a protective cover 25, the lower end of the protective cover 25 is fixedly connected to the platform base 34, the upper end of the protective cover 25 is fixedly connected to the lower end connecting portion of the upper bearing seat 17, the upper end of the upper bearing seat 17 is fixedly connected to a bearing cover which limits the upper end of the self-aligning roller bearing 18, the sealing assembly 19 is sheathed on the rotary axis 16, the upper part of the sealing assembly 19 is provided with a labyrinth dust-proof sealing ring 20, the outer side cover of the sealing assembly 19 is provided with a sand-proof maintenance cover 23, the upper end of the sand-proof maintenance cover 23 is fixedly connected to the upper end of the sealing assembly 19, and the lower end of the sand-proof maintenance cover 23 is pressed against the bearing cover. The material of the sand-proof maintenance cover 23 is stainless steel, and the dust-proof sealing ring 20 can realize the sealing between the sand-proof maintenance cover 23 and the rotary axis 16, so as to block sediment outside the sealing surface of the sand-proof maintenance cover 23 and place the sediment into the sealing surface.

[48] The sealing assembly 19 comprises a sealing sleeve seat, a lower sealing sleeve and an upper sealing sleeve respectively sleeved on the rotary axis 16, wherein the sealing sleeve seat is limitedly supported on the rotary axis 16, the lower sealing sleeve is supported on the sealing sleeve seat, the sealing between the sealing sleeve seat and the bearing cover is sealed by a sealing ring, the lower sleeve wall of the upper sealing sleeve is sleeved on the outer surface of the lower sealing sleeve, a spring is provided between the upper sealing sleeve and the lower sealing sleeve, and the upper sealing sleeve is limited by the compression nut 22.

[49] A diversion hole 26 is provided on the support base 15 corresponding to the upper bearing seat and the connection of the reduction motor, respectively, to ensure that leakage does not accumulate in the rotary axis 16 and the bearing system.

[50] In operation, the rotary axis 16 is driven by the reduction motor 14 to cooperate with the spray head assembly 8 to expand the processing range; in order to ensure precision, the spray head assembly 8 adopts a gantry support structure, that is, the X bracket 7-1 and the X axis bracket 35 constitute a gantry support structure to ensure the stability and rigidity of the spray head assembly 8; and the gantry support structure, the water collection tank 10 and the base of the water-proof rotary workbench 11 are mounted on the same planar surface of the platform base 34.

[51] The device organically combines an intelligent six-axis working platform with an underwater servo intelligent rotary workbench, and provided is an abrasive water jet cutting process technology of flexible and high-precision intelligent six-axis linkage 3D curved surface cutting, so as to realize the 3D curved surface forming of the aeroengine integral blade disc, and the water-proof servo rotary workbench 11 and the dynamic balance six-axis abrasive jet nozzle device 8 are arranged in a six-axis linkage when performing curved surface cutting, so as to achieve the cutting effect of high-precision linear curved surface cutting forming, thereby solving the pain point of the 3D linear curved surface forming precision cutting process of the aeroengine integral blade disc and blade ring, etc., and high-efficiency, green and low-cost machining process of aeroengine integral blade disc is realized.

[52] The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device 1s equipped with precision integrated dynamic balance spray head bracket and positioning mechanism. The nozzle has high mounting and positioning efficiency and high mounting precision, and at the same time, the high-efficiency and high-precision cutting processing of the complex 3D space curved surface can be realized.

[53] The water-proof rotary workbench uses a set of integrated matching compatible reduction motor components, which avoids the accumulation of assembly errors between servo motor and speed reducer in the field, and ensures the position precision and movement precision of rotary workbench by using the high position precision and movement precision of reduction motor.

[54] Areasonable layout of self-aligning bearing is adopted to support the rotary axis and workbench system, so as to ensure the position precision and movement precision of the rotating workbench; the double seal structure of mechanical rotary seal and labyrinth dust-proof sealing ring is adopted to block the mixture of water and sand cut by water knife on the outer layer of mechanical rotary seal to increase the reliability and service life of mechanical rotary seal system. At the same time, in the rotary axis and bearing system structure, the diversion holes are provided to ensure that there is no water and sediment accumulation in the rotary axis and bearing system structure,

improving the system reliability and service life.

Claims

Conclusions l. Grinding waterjet cutting method for a 3D curved surface with a flexible six-axis intelligent cutting platform, which is characterized by including the following steps:

S1. mounting a workpiece to be cut, detecting the positioning accuracy, and selecting an abrasive for cutting with a certain granularity and hardness according to the characteristics of the workpiece to be cut;

S2. loading the abrasive from step S1 into a grinding tank (4) of a 3D curved surface abrasive waterjet cutter with a flexible intelligent six-axis cutting platform, supplying compressed air to the grinding tank (4), and transferring the abrasive from the grinding tank (4) to a quantitative dose grinding feed tank; through an abrasive conduit (5) to achieve dynamic balance and temporary storage;

S3. selecting a working program of a nozzle assembly (8) through a control panel (9), with a waterproof servo rotation workbench (11) and the nozzle assembly (8) performing six-axis connection when cutting a curved surface, starting a high pressure water generation component (2), adjusting the required pressure to achieve a predetermined pressure, after the high pressure pump of the high pressure water generation component (2) works to achieve the predetermined cutting pressure, after opening a high pressure water switching valve (42), it, by the high-pressure water, forming a high-speed jet through a high-pressure water nozzle (43), and forming a negative pressure at the sand suction pipe of the grinding water jet head body (41), the working program automatically opens a grinding switching valve, the abrasive enters the sand suction pipe driven by the vacuum air flow , will enter and mix with the high-speed jet to form a grinding water jet with a cutting ability;

S4. starting to execute the cutting program of the nozzle assembly (8), cutting, by the grinding water jet, the workpiece to be cut and during the cutting process, the abrasive in the grinding tank (4) will continue to quantitatively abrasive supply tank (6) to be replenished under the action of the pressurized air;

S5. after the cutting is completed, by the cutting program control system, automatically turning off the abrasive-and-water circuit, finally turning off the high-pressure water generating component (1), turning off the machine, and finishing the predetermined cutting procedure.

The 3D curved surface grinding water jet cutting method with a flexible intelligent six-axis cutting platform according to claim 1, characterized in that : the abrasive in step S1 is brown corundum, white corundum or garnet, wherein the abrasive granularity is 40-100 mesh, and where the abrasive hardness is 6.7-7.5.

The grinding waterjet cutting method for a 3D curved surface with a flexible intelligent six-axis cutting platform according to claim 1, characterized in that : in the step S2, the pressurized air is delivered to the abrasive tank (4) so that the abrasive tank is filled is with 0.2-0.4 Mpa of pressurized air.

The grinding waterjet cutting method for a 3D curved surface with a flexible intelligent six-axis cutting platform according to claim 1, characterized in that : in the step S3, the high-pressure water generating component (2) uses a hydraulic double-acting supercharger, and wherein the high-pressure water generating component ( 2) has a predetermined cutting pressure of 360-600 MPa and a flow rate of 3-5 L/min.

The grinding waterjet cutting method for a 3D curved surface with a flexible intelligent six-axis cutting platform according to claim 1, characterized in that : in the step S4, the grinding waterjet has a cutting speed of the workpiece to be cut of 20-160mm /min.