CN114310677A - 3D curved surface cutting process of abrasive water jet flexible intelligent six-axis cutting platform - Google Patents
3D curved surface cutting process of abrasive water jet flexible intelligent six-axis cutting platform Download PDFInfo
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- CN114310677A CN114310677A CN202210008789.XA CN202210008789A CN114310677A CN 114310677 A CN114310677 A CN 114310677A CN 202210008789 A CN202210008789 A CN 202210008789A CN 114310677 A CN114310677 A CN 114310677A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0076—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier the blasting medium being a liquid stream
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
- B24C3/20—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by turntables
- B24C3/22—Apparatus using nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J11/00—Manipulators not otherwise provided for
- B25J11/005—Manipulators for mechanical processing tasks
- B25J11/0055—Cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J18/00—Arms
- B25J18/007—Arms the end effector rotating around a fixed point
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J5/00—Manipulators mounted on wheels or on carriages
- B25J5/02—Manipulators mounted on wheels or on carriages travelling along a guideway
- B25J5/04—Manipulators mounted on wheels or on carriages travelling along a guideway wherein the guideway is also moved, e.g. travelling crane bridge type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0096—Programme-controlled manipulators co-operating with a working support, e.g. work-table
Abstract
The invention relates to a 3D curved surface cutting process of an abrasive water jet flexible intelligent six-axis cutting platform, which comprises the following steps: s1, installing a workpiece to be cut, and selecting an abrasive material; s2, filling abrasive into an abrasive tank, conveying compressed air into the abrasive tank, and conveying the abrasive into a quantitative abrasive metering feeding tank through an abrasive pipe to achieve dynamic balance and temporary storage; s3, starting a high-pressure water generating component, forming high-speed jet flow by high-pressure water when the high-pressure pump runs to reach a preset cutting pressure, forming negative pressure at a sand suction pipe of the abrasive jet flow nozzle body, opening an abrasive switching valve, enabling abrasive to enter the sand suction pipe, and mixing the abrasive with the high-speed jet flow to form abrasive water jet flow; s4, starting a cutting program, and cutting the workpiece to be cut by abrasive water jet; and S5, after cutting is finished, the cutting program control system automatically turns off the abrasive and the water switch, finally turns off the high-pressure water generating component, turns off the machine, and finishes the preset cutting process. The cutting process can realize high-efficiency and high-precision machining of the complex 3D space curved surface.
Description
Technical Field
The invention belongs to the technical field of abrasive water jet cutting processes, and relates to a 3D curved surface cutting process of an abrasive water jet flexible intelligent six-axis cutting platform.
Background
At present, multi-axis water jet cutting equipment at home and abroad is generally 5-axis 5-linkage high-end water cutting equipment, a 6-axis industrial robot and a seventh expansion axis rotating workbench, and five-axis water knives of an X axis, a Y axis, a Z axis, a rotating axis, an A axis and a B axis of an existing linear moving axis are used. The 5-shaft water jet cutter has the advantages that: parts with conicity and swing angle can be cut; the disadvantages are that: the cutting swing angle is small, the angle is insufficient or dead angles exist when some complex parts are cut, and the 3D curved surface cutting point cannot be reached; at present, water jet cutting equipment of industrial robots is also available and comprises two types of pure water jet cutting and abrasive water jet cutting, and the pure water jet cutting equipment is characterized in that the pure water jet cutting equipment is not provided with an abrasive supply system, has cutting pressure of about 200 MPa generally, and is mostly used for cutting non-metal materials (such as automotive interiors and the like); the abrasive water jet cutting is used for cutting metal parts, the existing industrial robot abrasive water jet cutting equipment has the defects that the nozzle mounting support is complex in design, the accumulated machining error is large, the concentricity and the verticality of the nozzle and a system are difficult to guarantee during mounting, the mounting consistency and the mounting design precision of the nozzle cannot be guaranteed, and in addition, the rigidity of the industrial robot is limited, so that the precision of a cut workpiece is low, and even waste products are generated; in the existing industrial robot water jet cutting equipment, because the design and processing defects of a rotary worktable exist, a servo motor and a speed reducer are of a two-body structure, a large error exists during installation, the cutting precision is greatly influenced, in addition, the seal of the rotary worktable is directly exposed in silt, and the accident of seal failure often occurs, so that the problems that the existing device and the industrial robot 7-axis cutting device are extremely difficult to install and position workpieces, the positioning precision is not up to the standard, the production efficiency is low and the like are easy to occur; the rotary seal is easy to lose effectiveness, the part method and safety are poor aiming at 3D curved surface cutting, and the five-axis cutting device is difficult to realize complex 3D curved surface part cutting due to a small swing angle.
For the above reasons, the current water jet 3D curved surface forming and cutting process still has the following problems and disadvantages, which are to be improved and improved:
1. the spray head adopts a complex spray head bracket, the accumulated error is very large during processing and installation, and the installation precision and the processing precision are difficult to ensure due to the lack of effective high-pressure pipeline positioning measures;
2. the design and processing of the underwater servo rotary worktable have defects, and the servo motor and the speed reducer are of a two-body structure, so that a large random error exists during installation, and the cutting precision is greatly influenced;
3. the mechanical sealing device of the underwater servo rotary worktable is directly immersed and exposed in the severe water sand slurry after cutting, and the sand directly enters the sealing surface, so that the sealing surface is easily abraded, the rotary worktable is often failed due to the accident of rotary sealing failure;
4. in the structure of the rotating shaft and the bearing assembly, the leakage safety discharge protection function is not provided, once the sealing is failed and leaked for a short time, sewage, mud and sand are easy to accumulate at the rotating shaft and the bearing, and the rotating shaft and the bearing system are failed.
Disclosure of Invention
Aiming at the problems, the invention provides a 3D curved surface cutting process of an abrasive water jet flexible intelligent six-axis cutting platform, which can realize high-efficiency and high-precision machining on a complex 3D space curved surface.
The technical scheme of the invention is as follows:
the utility model provides a six flexible intelligent cutting platform 3D curved surface cutting process of abrasive water jet, wherein: the method comprises the following steps:
s1, installing a workpiece to be cut, detecting the positioning precision, and selecting a cutting abrasive material with proper granularity and hardness according to the material property of the workpiece to be cut;
s2, filling the abrasive material obtained in the step S1 into an abrasive material tank of the abrasive material water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, conveying compressed air into the abrasive material tank, and conveying the abrasive material from the abrasive material tank to a quantitative abrasive material metering feeding tank through an abrasive material pipe to achieve dynamic balance temporary storage;
s3, selecting a spray head component operation program through a control panel, enabling the waterproof servo rotary workbench and the spray head component to be in six-axis linkage when curved surface cutting is carried out, starting a high-pressure water generating component, adjusting the required pressure to reach a preset pressure, opening a high-pressure water switch valve after a high-pressure pump operates to reach the preset cutting pressure, enabling high-pressure water to form high-speed jet flow through a high-pressure water nozzle, forming negative pressure at a sand suction pipe of the abrasive jet flow spray head body, automatically opening the abrasive switch valve by the operation program, enabling abrasive to enter the sand suction pipe under the driving of vacuum airflow and be mixed with the high-speed jet flow to form abrasive water jet flow with cutting capacity;
s4, starting a cutting program of the execution spray head assembly, cutting a workpiece to be cut according to a preset program by abrasive water jet, and continuously supplementing abrasive in an abrasive tank to an abrasive quantitative supply tank under the action of compressed air in the cutting process;
and S5, after cutting is finished, the cutting program control system automatically turns off the abrasive and the water switch, finally turns off the high-pressure water generating component, turns off the machine, and finishes the preset cutting process.
Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the abrasive in the step S1 is brown corundum, white corundum or garnet, the abrasive granularity is 40-100 meshes, and the abrasive hardness is 6.7-7.5.
Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: and in the step S2, compressed air is conveyed into the abrasive tank, so that the abrasive tank is filled with the compressed air of 0.2-0.4 Mpa.
Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: the high-pressure water generating component in the step S3 adopts a hydraulic double-acting supercharger, the preset cutting pressure of the high-pressure water generating component is 360-600MPa, and the flow rate is 3-5L/min.
Preferably, the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, wherein: and in the step S4, the cutting speed of the abrasive water jet on the workpiece to be cut is 20-160 mm/min.
The invention has the technical effects that:
(1) according to the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process, the intelligent six-axis working platform and the underwater servo rotary worktable are organically combined, and an abrasive water jet cutting process technology for flexible intelligent six-axis linkage 3D curved surface cutting is provided, so that 3D curved surface forming machining of an aero-engine blisk can be achieved, the cutting effect of high-precision linear curved surface cutting forming can be achieved, and the high-efficiency, green and low-cost machining process of the aero-engine blisk is achieved.
(2) The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process can realize efficient and high-precision cutting machining of complex 3D space curved surfaces.
Drawings
Fig. 1 is a schematic structural view of embodiment 2.
Fig. 2 is a schematic structural view of the cutting table assembly in embodiment 2.
Fig. 3 is a schematic structural view of a waterproof rotary table in embodiment 2.
Fig. 4 is a schematic structural view of a head assembly in embodiment 2.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Example 1
The utility model provides a six flexible intelligent cutting platform 3D curved surface cutting process of abrasive water jet, wherein: the method comprises the following steps:
s1, installing a workpiece to be cut, detecting the positioning accuracy, and selecting a cutting abrasive with proper granularity and hardness according to the material property of the workpiece to be cut, wherein the abrasive is brown corundum, white corundum or garnet, the granularity of the abrasive is 40-100 meshes, and the hardness of the abrasive is 6.7-7.5;
s2, filling the abrasive in the step S1 into an abrasive tank 4 of the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, starting the abrasive to convey compressed air, enabling the abrasive tank 4 to be filled with 0.2-0.4 Mpa of compressed air, and conveying the abrasive from the abrasive tank 4 to a quantitative abrasive metering feeding tank 6 through an abrasive pipe 5 to achieve dynamic balance temporary storage;
s3, selecting an operating program of a spray head assembly 8 through a control panel 9, six-axis linkage is carried out when the waterproof servo rotary worktable 11 and the spray head assembly 8 carry out curved surface cutting, starting a high-pressure water generating component 2, wherein the high-pressure water generating component 2 adopts a hydraulic double-acting supercharger, the rated cutting pressure generated by the high-pressure water generating component 2 is 360-plus-600 MPa, the flow rate is 3-5L/min, the required pressure is adjusted to reach the preset pressure, the high-pressure water generating component comprises a high-pressure pump, a motor, a pipeline and a hydraulic pump, after the high-pressure pump operates to reach the preset cutting pressure, a high-pressure water switch valve 42 is opened, high-pressure water passes through a high-pressure water nozzle 43 to form high-speed jet flow, negative pressure is formed at a sand suction pipe of an abrasive jet flow spray head body 41, the operating program automatically opens the abrasive flow switch valve, abrasives can enter the sand suction pipe under the drive of vacuum air flow to be mixed with the high-speed jet flow, forming an abrasive water jet having cutting capabilities;
s4, starting a cutting program of the execution spray head component 8, cutting a workpiece to be cut according to a preset program by abrasive water jet, wherein the cutting speed of the workpiece to be cut is 20-160 mm/min, and in the cutting process, the abrasive in the abrasive tank 4 can continuously supplement the abrasive quantitative feeding tank 6 under the action of compressed air;
and S5, after cutting is finished, the cutting program control system automatically turns off the abrasive and the water switch, finally turns off the high-pressure water generating component 1, turns off the machine, and finishes the preset cutting process.
Example 2
The embodiment provides a 3D curved surface cutting device for an abrasive water jet flexible intelligent six-axis cutting platform, as shown in fig. 1 to 4 and shown in fig. 1 to 4, the cutting 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 supply tank 6, a cutting platform assembly 7, an X support 7-1, a Y-axis ball screw 7-2, a Z-axis ball screw 7-3, a rotating A axis 7-4, a rotating B axis 7-5, a spray head assembly 8, a control panel 9, a water collecting tank 10, a waterproof rotating workbench 11, a speed reducing motor 14, a supporting base 15, a rotating axis 16, an upper bearing seat 17, a self-aligning roller bearing 18, a sealing assembly 19, a labyrinth dustproof sealing ring 20, a workpiece mounting table 21, a compression nut 22, a sand control maintenance cover 23, a thrust roller bearing 24, a protective cover 25, a flow guide hole 26, a rotating A axis joint 38, A rotary B-axis 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 jet pipe 45 and the like.
As shown in fig. 1 to 4, the invention relates to a 3D curved surface cutting device for an abrasive water jet flexible intelligent six-axis cutting platform, which comprises a platform base 34, wherein a water collecting tank 10 is arranged at the bottom of the platform base 34, a waterproof rotary worktable 11 is rotatably arranged on the platform base 34, a cutting platform assembly 7 matched with the waterproof rotary worktable 11 is further fixed on the platform base 34, and a spray head assembly 8 is arranged at an execution end of the cutting platform assembly 7.
The abrasive tank 4 is arranged outside the platform base 34 to supply abrasive to the spray head assembly 8, the bottom discharge port of the abrasive tank 4 is connected with the feed port of the spray head assembly 8 in a sealing mode through the abrasive pipe 5, and the abrasive quantitative supply tank 6 is arranged on the abrasive pipe 5. During operation, the abrasive is conveyed in a compressed air conveying mode and a dynamic balance automatic sand supplementing mode, and the abrasive for cutting is conveyed to the quantitative feeding tank 6 through the abrasive tank 4 by compressed air under medium pressure.
The water inlet end of the spray head component 8 is connected with the high-pressure water generating component 2 through the high-pressure pipeline 3. The high-pressure water generating component 2 adopts a hydraulic double-acting supercharger to supercharge and amplify the hydraulic oil pressure to the required cutting pressure, the rated pressure generated by the high-pressure water generating component 2 is 360-600MPa, and the flow rate is 3-5L/min.
The nozzle assembly 8 comprises a dynamic balance nozzle support 40, a high-pressure water nozzle 43 is mounted on the dynamic balance nozzle support 40, a high-pressure water switch valve 42 is arranged at the water inlet end of the high-pressure water nozzle 43, the water inlet of the high-pressure water switch valve 42 is hermetically connected with the high-pressure pipeline 3, an abrasive jet nozzle body 41 is arranged at the water outlet end of the high-pressure water nozzle 43, a sand mulling chamber 44 is arranged on the abrasive jet nozzle body 41, an abrasive jet pipe 45 is arranged at the outlet end of the sand mulling chamber 44, and the abrasive jet nozzle body 41 is connected with the abrasive pipe 5.
When the high-pressure water jet cutting machine works, the high-pressure water generating component 2 provides ultrahigh pressure of 400MPa, the ultrahigh pressure water is conveyed to the spray head component 8 through the high-pressure pipeline 3, the high-pressure water forms high-speed water jet after passing through the high-pressure water nozzle 43, negative pressure is formed in the cavity of the sand mixing chamber 44 by the high-speed water jet, abrasive in the quantitative feeding tank 6 is sucked into the sand mixing chamber 44, and the high-speed abrasive water jet is accelerated through the abrasive spraying pipe 45 made of hard alloy to form high-speed abrasive water jet for abrasive water cutting.
Set up housing 1 on the platform base 34, cutting platform subassembly 7 and waterproof swivel work head 11 all arrange housing 1 in, set up control panel 9 on the housing 1. In a specific practice, a mist absorber is arranged on the top of the housing 1, and a mist absorbing port of the mist absorber is arranged above the working position of the abrasive injection pipe 45.
As shown in FIG. 2, the cutting platform assembly 7 comprises two sets of X-ray stands 7-1, two sets of X-ray stands 7-1 are supported on a platform base 34, each set of X-ray stands 7-1 is respectively provided with an X-axis support 35 at the top end, an X-axis ball screw is arranged on the inner side surface of the X-axis support 35, a screw seat of the X-axis ball screw is fixedly connected with a Y-axis support 36, a Y-axis ball screw 7-2 is arranged on the side surface of the Y-axis support 36, a screw seat of the Y-axis ball screw 7-2 is fixedly connected with a Z-axis support 37, a Z-axis ball screw 7-3 is arranged on the side surface of the Z-axis support 37, a rotary A-axis joint 38 is fixedly connected with a rotary A-axis joint 38, a rotary A-axis 7-4 is rotatably arranged on the rotary A-axis joint 38, a rotary B-axis spray nozzle support 39 is arranged on the side surface of the rotary A-axis joint 38, a rotary B-axis 7-4 is fixedly connected with a rotary B-axis spray nozzle support 39, the rotating B shaft spray head bracket 39 is rotatably provided with a rotating B shaft 7-5; the rotating B-axis 7-5 drives the spray head assembly 8 to rotate.
It can be understood that, in order to implement six-axis direction processing on a workpiece during operation, an X-axis ball screw is arranged on the inner side surface of the X-axis bracket 35, a nut seat of the X-axis ball screw is fixedly connected with the Y-axis bracket 36, and the X-axis ball screw drives the Y-axis bracket 36 to implement X-axis direction movement; a Y-axis ball screw 7-2 arranged on the side surface of the Y-axis support 36 is a screw shaft, a nut seat on the Y-axis ball screw 7-2 drives the Z-axis support 37 to reciprocate in the Y-axis direction, a Z-axis ball screw 7-3 is a screw shaft, and the X-axis ball screw, the Y-axis ball screw 7-2 and the Z-axis ball screw 7-3 are respectively driven by a corresponding driving motor to rotate; the screw seat of the Z-axis ball screw 7-3 drives the rotating A-axis joint 38 to perform lifting motion, the rotating A-axis 7-4 is driven by a corresponding driving motor to perform rotating motion, the rotating A-axis 7-4 drives the rotating B-axis spray head bracket 39 to rotate, the rotating B-axis 7-5 is rotatably arranged on the rotating B-axis spray head bracket 39, and the rotating B-axis 7-5 is driven by a corresponding driving motor to rotate. In order to realize reliable guide in work, the X-axis support 35 is provided with an X-axis guide rod in a matching way, and the corresponding nut seat is in threaded connection with the X-axis ball screw and is also in sliding fit with the X-axis guide rod; the Y-axis support is matched with a Y-axis guide rod, and the corresponding nut seat is in threaded connection with the Y-axis ball screw and is also in sliding fit with the Y-axis guide rod; the Z-axis support 37 is provided with a Z-axis guide rod in a matching way, and the corresponding nut seat is in threaded connection with the Z-axis ball screw and is also in sliding fit with the Z-axis guide rod.
As shown in fig. 3, the waterproof rotary worktable 11 includes a speed reduction motor 14, a support base 15, a rotating shaft 16, a bearing seat 17, a self-aligning roller bearing 18, a sealing assembly 19, a labyrinth dust seal 20, a workpiece mounting table 21, a gland nut 22, a sand control maintenance cover 23, a thrust roller bearing 24, a protective cover 25, and a diversion hole 26. In practice, the gearmotor 14 has a power of 3.75KW, a high ratio planetary gearbox in the gearmotor 14 with a rated torque of 3100Nm and a reduction ratio of 118.5.
The support base 15 is installed on the platform base 34, the speed reducing motor 14 is installed on the support base 15, an output shaft of the speed reducing motor 14 is fixedly connected with the rotating shaft 16, a lower bearing seat is constructed on the upper portion of the support base 15, the top of the lower bearing seat is fixedly connected with the upper bearing seat 17, the thrust roller bearing 24 is installed on the lower bearing seat, the self-aligning roller bearing 18 is installed on the upper bearing seat 17, the rotating shaft 16 is sequentially matched with the thrust roller bearing 24 and the self-aligning roller bearing 18, and the upper end of the rotating shaft 16 is fixedly connected with the workpiece installation table 21.
The protection casing 25 is established to the outside cover of support base 15, the lower extreme and the 34 fastening connection of platform base of protection casing 25, the upper end of protection casing 25 and the lower extreme connecting portion fastening connection of bolster bearing housing 17, the upper end fastening connection axle bearing cap of bolster bearing housing 17, bearing gland carry on spacingly to the upper end of aligning roller bearing 18, on the rotation axis 16 was located to seal assembly 19 cover, seal assembly 19's upper portion set up labyrinth dustproof sealing ring 20, sand control maintenance lid 23 is established to seal assembly 19's outside cover, sand control maintenance lid 23's upper end and seal assembly 19's upper end fastening connection, sand control maintenance lid 23's lower extreme compresses tightly on bearing gland. The material of sand control maintenance lid 23 is the stainless steel, and dust seal 20 can realize the sealed between sand control maintenance lid 23 and the rotation axis 16 to block silt and place silt and get into in the sealing surface outside the sealing surface of sand control maintenance lid 23.
The sealing assembly 19 comprises a sealing sleeve seat, a lower sealing sleeve and an upper sealing sleeve which are respectively sleeved on the rotating shaft 16, the sealing sleeve seat is supported on the rotating shaft 16 in a limiting mode, the lower sealing sleeve is supported on the sealing sleeve seat, the sealing sleeve seat and the bearing cover are sealed through 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 arranged between the upper sealing sleeve and the lower sealing sleeve, and the upper sealing sleeve is limited through a compression nut 22.
Diversion holes 26 are respectively arranged on the supporting base 15 corresponding to the upper bearing seat and the connection part of the speed reducing motor so as to ensure that leakage cannot accumulate in the rotating shaft 16 and the bearing system.
When the spray head assembly 8 works, the rotating shaft 16 is matched with the spray head assembly 8 under the driving of the speed reducing motor 14, the processing range is expanded, in order to ensure the precision, the spray head assembly 8 adopts a gantry supporting structure, namely, an X support 7-1 and an X shaft support 35 form the gantry supporting structure, the stability and the rigidity of the spray head assembly 8 are ensured, and the gantry supporting structure, the water collecting tank 10 and the base of the waterproof rotary workbench 11 are arranged on the same plane of the platform base 34.
The device organically combines an intelligent six-axis working platform with an underwater servo intelligent rotary worktable, and provides an abrasive water jet cutting process technology for flexible high-precision intelligent six-axis linkage 3D curved surface cutting, so that 3D curved surface forming processing of an aero-engine blisk can be realized, the waterproof servo rotary worktable 11 and the dynamic balance six-axis abrasive water jet spray nozzle device 8 are in six-axis linkage when curved surface cutting is carried out, and therefore the cutting effect of high-precision linear curved surface cutting forming is achieved, pain points of 3D linear curved surface forming precision cutting processes such as the aero-engine blisk and a blade ring are solved, and the efficient, green and low-cost processing technology of the aero-engine blisk is realized.
The accurate integrated dynamic balance spray nozzle support and the positioning mechanism of the spray nozzle are arranged in the abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, the spray nozzle is high in installation and positioning efficiency and installation accuracy, and meanwhile, efficient and high-precision cutting machining of complex 3D space curved surfaces can be achieved.
The waterproof rotary workbench adopts a set of speed reduction motor parts which are integrated, matched and compatible, avoids the accumulation of on-site assembly errors of the servo motor and the speed reducer, and ensures the position accuracy and the movement accuracy of the rotary workbench by utilizing the high position accuracy and the movement accuracy of the speed reduction motor.
The self-aligning bearings with reasonable layout are adopted to be matched for use, the rotating shaft and the workbench system are supported, and the position precision and the motion precision of the rotating workbench are ensured; the double sealing structure of mechanical rotary seal and labyrinth dustproof sealing ring is adopted, the water-sand mixture cut by the water jet cutter is blocked at the outer layer of the mechanical rotary seal, and the reliability and the service life of the mechanical rotary seal system are improved; meanwhile, in the rotating shaft and bearing system structure, the flow guide holes are formed, so that water and sediment are prevented from accumulating in the rotating shaft and bearing system structure, the reliability of the system is improved, and the service life of the system is prolonged.
Claims (5)
1. The utility model provides a six cutting platform 3D curved surface cutting process of flexible intelligence of abrasive water jet which characterized in that: the method comprises the following steps:
s1, installing a workpiece to be cut, detecting the positioning precision, and selecting a cutting abrasive material with certain granularity and hardness according to the material property of the workpiece to be cut;
s2, filling the abrasive material obtained in the step S1 into an abrasive material tank (4) of the abrasive material water jet flexible intelligent six-axis cutting platform 3D curved surface cutting device, conveying compressed air into the abrasive material tank (4), and conveying the abrasive material from the abrasive material tank (4) into a metering abrasive material quantitative feeding tank (6) through an abrasive material pipe (5) to achieve dynamic balance temporary storage;
s3, selecting a spray head component (8) to operate a program through a control panel (9), six-axis linkage is carried out between a waterproof servo rotary worktable (11) and the spray head component (8) when curved surface cutting is carried out, a high-pressure water generating component (2) is started, required pressure is adjusted to reach preset pressure, when a high-pressure pump of the high-pressure water generating component (2) operates to reach preset cutting pressure, high-pressure water forms high-speed jet flow through a high-pressure water nozzle (43) after a high-pressure water switch valve (42) is opened, negative pressure is formed at a sand suction pipe of an abrasive jet flow spray head body (41), the operating program automatically opens the abrasive switch valve, abrasive materials can enter a sand suction pipe under the drive of vacuum air flow and are mixed with the high-speed jet flow, and water jet abrasive materials with cutting capability are formed;
s4, starting a cutting program of the execution spray head assembly (8), cutting a workpiece to be cut by abrasive water jet, and continuously supplementing the abrasive quantitative feeding tank (6) with abrasive in the abrasive tank (4) under the action of compressed air in the cutting process;
and S5, after cutting is finished, the cutting program control system automatically turns off the abrasive and the water switch, finally turns off the high-pressure water generating component (1), turns off the machine, and finishes the preset cutting process.
2. The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of claim 1, wherein: the abrasive in the step S1 is brown corundum, white corundum or garnet, the abrasive granularity is 40-100 meshes, and the abrasive hardness is 6.7-7.5.
3. The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of claim 1, wherein: and in the step S2, compressed air is conveyed into the abrasive tank (4) so that the abrasive tank is filled with the compressed air of 0.2-0.4 Mpa.
4. The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of claim 1, wherein: the high-pressure water generating component (2) in the step S3 adopts a hydraulic double-acting supercharger, the preset cutting pressure of the high-pressure water generating component (2) is 360-600MPa, and the flow rate is 3-5L/min.
5. The abrasive water jet flexible intelligent six-axis cutting platform 3D curved surface cutting process of claim 1, wherein: and the cutting speed of the abrasive water jet in the step S4 on the workpiece to be cut is 20-160 mm/min.
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| NL2032480A NL2032480B1 (en) | 2022-01-05 | 2022-07-13 | Abrasive water jet flexible intelligent six-axis cutting platform 3d curved surface cutting process |
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