Aerospace-grade ball grid precision machining system

A precision machining and aerospace-level technology, applied in the direction of metal processing equipment, metal processing machinery parts, manufacturing tools, etc., can solve the problems of interactive active parts that have not been seen in the application, and achieve the purpose of providing space processing range, improving processing efficiency, and processing smooth process effect

Active Publication Date: 2021-01-15
SUZHOU KEAIJIA AUTOMATION TECH CO LTD
6 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Although the function of the ball grid to transmit signals has been known for a long time, and the use of t...
View more

Method used

As mentioned above, the present invention provides a kind of precision that improves wire processing, makes the ball grid surface processing precision machine tool interactive workbench system of μ level that processing precision breaks through, and this system not only considers the precision control of passive cutting aspect, and In the passive workbench system, multiple sets of ball grid active detection systems with different positions and different detection and control purposes are also introduced. The workbench will change from passive work to active cooperation, and even actively direct the reasonable work of the cutting system. The specific use of active cooperation The advanced three-dimensional cutting machine tool, coupled with the active clamping part, realizes a full range of processing modes. The workpiece to be processed is fixed on the processing table at one time, and the full range of processing is realized through the active operation of the processing machine until it is processed. One side of the workpiece is completely processed, and all the processing procedures on one side can be completed with a single positioning, which improves the processing efficiency and avoids processing errors caused by multiple positioning, that is, improves the processing accuracy.
At the same time, the lower surface of the turntable 200 and the upper surface of the swing seat 700 are connected by a slewing bearing, and the turntable 200 and the swing seat 700 are connected by a slewing support, so that the rotation of the turntable 200 is smoother and reduces frictional resistance . The rotating shaft 270 is rotatably supported in the rotating sleeve 750, so that the rotating table 200 is limited to the upper end of the swing seat 700 and can rotate freely by 360°. The slewing bearing bears the load and reduces friction. In the table 200 and the swing base 700, the lifting height of the rotary table 200 on the swing base 700 is reduced, and the rotation process is more stable and smooth.
Simultaneously, under the double action of multiple ball grid measurements and signal feedback, multi-dimensional synchronous high-precision measurement is realized, and the amount of motion of the processing machine is measured in real time, so as to accurately control the machining process and further improve the machining accuracy of the workpiece , the workpiece basically has no machining accuracy deviation, so that the size of the original design model is basically the same as that of the processed workpiece, which improves the product accuracy and quality, and the machining accuracy reaches the micron level or above. The backlash-free screw base is used to eliminate the systematic error of the translation of the workpiece, and the anti-backlash transmission system is used to eliminate the rotation system error of the rotary table to further improve the machining accuracy.
The upper end of the swing base 700 is horizontally provided with a first bracket 710, and the first angular displacement ball grid 400 includes a ring-shaped ball grid scale 420 arranged at the lower end of the rotary table 200 and a second reading head sleeved on the ring-shaped ball grid scale 420 410 , the second reading head 410 is synchronously connected with the rotary table 200 , the second reading head 410 measures the rotation angle of the rotary table 200 in real time, and the annular ball scale 420 is arranged concentrically with the rotary table 200 . In order to further improve the measured rotation accuracy of the rotary table 200, two, four, six or more second reading heads 410 can be symmetrically sleeved on the annular ball scale 420, and the average displacement can be calculated, thereby further The measurement accuracy of the first angular displacement ball grid 400 is improved.
The upper end of the swing seat 700 is provided with at least two second supports 720 at intervals. In this embodiment, a groun...
View more

Abstract

Disclosed is an aerospace-grade ball grid precision machining system, comprising a workbench (100), a rotating table (200), a linear displacement ball grid (300), a first angular displacement ball grid (400), a clearance elimination drive system (500), a second angular displacement ball grid (600), a swing seat (700), a universal ball seat (800) and a sway assembly (900). The workbench (100) is movably arranged on the rotating table (200). The linear displacement ball grid (300) measures the amount of movement of the workbench (100). The rotating table (200) is rotatably arranged on the swing seat (700) by means of the clearance elimination drive system (500). The first angular displacement ball grid (400) measures the amount of rotation of the rotating table (200). The swing seat (700) is arranged on the universal ball seat (800) in a swinging manner by means of the sway assembly (900). The second angular displacement ball grid (600) measures the amount of swing of the swing seat (700). Machined parts are fixed on the workbench (100). With the multi-dimensional operation and precision control of a machining machine, the machining efficiency and precision on machined parts are improved.

Application Domain

Measurement/indication equipmentsUsing electrical means

Technology Topic

PhysicsEngineering +5

Image

  • Aerospace-grade ball grid precision machining system
  • Aerospace-grade ball grid precision machining system
  • Aerospace-grade ball grid precision machining system

Examples

  • Experimental program(4)

Example Embodiment

[0049]Example one
[0050]The invention provides an aerospace grade ball grid precision machining system, such asFigure 1-11 As shown, it includes a worktable 100, a rotating table 200, a linear displacement ball grid 300, a first angular displacement ball grid 400, an anti-backlash transmission system 500, a second angular displacement ball grid 600, a swing seat 700, a universal ball seat 800, and The swing assembly 900, the worktable 100 is moved and set on the rotating table 200, the linear displacement ball grid 300 measures the movement of the worktable 100, the rotating table 200 is rotated and set on the swing seat 700 through the anti-backlash transmission system 500, and the first angular displacement ball The grid 400 measures the amount of rotation of the rotating table 200, the swing seat 700 is set on the universal ball seat 800 through the swing assembly 900, and the second angular displacement ball grid 600 measures the amount of swing of the swing seat 700, and the workpiece is fixed on the table 100 Above, with the multi-dimensional operation and precision control of the processing machine, a full-scale spatial processing process of the workpiece is realized, and the processing efficiency and precision of the workpiece are improved.
[0051]Specifically, the swing seat 700 is a columnar structure, and a first ball head 740 is provided at the lower end. Correspondingly, the center of the universal ball seat 800 is provided with a spherical concave surface 821, and the swing seat 700 is movably set on the spherical concave surface through the first ball head 740. In 821, the swing seat 700 is oscillated in any direction at the center of the universal ball seat 800, and the universal ball seat 800 is suspended on the ground through 810, so that the spherical concave surface 821 is suspended on the ground;
[0052]The rotating table 200 is rotatably arranged on the upper end of the swing seat 700. A rotating sleeve 750 is longitudinally provided on the upper end of the swing seat 700. Correspondingly, a rotating shaft 270 matched with the rotating sleeve 750 extends from the center of the lower end of the rotating table 200. Inside the sleeve 750, the rotating table 200 is restricted to the upper end of the swing seat 700 and can rotate freely in 360°. The upper surface of the rotary table 200 is provided with two supports 210 in parallel. The supports 210 span both ends of the rotary table 200. The inner side of the upper end of the support 210 is provided with a chute. The table 100 is moved and arranged on the chute. The length of the chute is It is consistent with the length of the support 210, and a limit table is provided at both ends of the chute to limit the movement of the station table 100.
[0053]A screw-in screw 230 is provided at the bottom of the worktable 100. The screw-in screw 230 is located in parallel between the two supports 210. The first end of the screw-in screw 230 is provided with a hand wheel 250, and the second end of the screw-in screw 230 is provided with In the first motor 240, a screw seat hole 220 is provided on the rotating table 200 between the two supports 210, and a gapless screw seat 260 is screwed on the outer circumference of the center of the screwed screw 230. 260 is fixed in the screw base hole 220. When the screw 230 is rotated, the screw 230 is screwed in and out of the gapless screw base 260, thereby driving the worktable 100 to move back and forth on the support 210 .
[0054]The linear displacement ball grid 300 includes a linear ball grid 320 arranged at the upper end of the chute and a first reading head 310 sleeved on the linear ball grid 320. The first reading head 310 is synchronously connected with the side wall of the worktable 100. The linear ball The length of the scale 320 is greater than the moving range of the workbench 100. When the worktable 100 moves on the support 210, the movement of the worktable 100 can be measured in real time, that is, the high-precision line processing control of the work piece is performed, and the linear displacement of the work piece is equal to the worktable 100 The amount of movement, the linear displacement machining accuracy of the workpiece is the measurement accuracy of the linear displacement ball grid 300, and the accuracy can reach micrometers or more.
[0055]The upper end of the swing seat 700 is transversely provided with a first bracket 710. The first angular displacement ball grid 400 includes an annular ball grid 420 arranged at the lower end of the rotating table 200 and a second reading head 410 sleeved on the annular ball grid 420. The second reading head 410 is synchronously connected with the rotating table 200, the second reading head 410 measures the rotation angle of the rotating table 200 in real time, and the annular ball scale 420 is arranged concentrically with the rotating table 200. In order to further improve the measured rotation accuracy of the rotating table 200, two, four, six or more second reading heads 410 may be symmetrically sleeved on the annular ball scale 420 to calculate the average displacement, thereby further Improve the measurement accuracy of the first angular displacement ball grid 400.
[0056]The upper end of the swing seat 700 is provided with at least two second brackets 720 at intervals. In this embodiment, a floor stand 720 is provided on opposite sides of the swing seat 700, and the anti-backlash transmission system 500 is provided at the upper end of the second bracket 720. The anti-backlash transmission system 500 includes a second motor 510, a reduction box 520 connected to the output shaft of the second motor 510, and an anti-backlash gear 530 arranged at the output end of the reduction box 520. The reduction box 520 is a multi-stage reduction box to increase the reduction ratio. A ring of internal gear 280 is provided on the outer periphery of the lower end of the rotating table 200. The anti-backlash gear 530 meshes with the internal gear 280. The second motor 510 drives the rotating table 200 to 360° on the swing seat 700 through the meshed anti-backlash gear 530 and the internal gear 280. °Rotation drives the second reading head 410 to rotate synchronously on the annular ball scale 420, so as to accurately measure the precise rotation angle of the rotating table 200, that is, the rotation angle of the workpiece can be accurately controlled to improve the processing accuracy.
[0057]Generally, the meshing connection of the anti-backlash gear 530 and the internal gear 280 has a tooth pitch gap. The anti-backlash gear 530 and the side wall of the internal gear 280 are in contact, driving the rotating table 200 to rotate in one direction. When the rotating table When the 200 rotates in the other direction, that is, when it is reversed, the anti-backlash gear 530 needs to be idly moved by one gear pitch to make the anti-backlash gear 530 contact the side wall of the gear on the other side of the internal gear 280, and the anti-backlash gear 53 drives to rotate The table 200 is reversed. The one-tooth gap that causes the anti-backlash gear 530 to rotate idly affects the rotation accuracy of the rotating table 200, that is, causes the machining error of the workpiece to be processed, and affects the product quality. In order to solve this problem, An anti-backlash transmission system 500 meshing with the internal gear 280 is provided on the opposite sides of the swing seat 700, wherein the anti-backlash gear 530 of the first anti-backlash transmission system 500 collides with the first side wall of the internal gear 280, and The anti-backlash gear 530 of the second anti-backlash transmission system 500 conflicts with the second side wall of the internal gear 280, and the two anti-backlash transmission systems 500 operate synchronously, so that when the rotating table 200 rotates forward or reversely, the anti-backlash gear 530 Both of them conflict with the two opposite side walls of the internal gear 280, thereby eliminating the one-tooth gap that causes the anti-backlash gear 530 to rotate idle, so that the gap of the anti-backlash gear 530 driving the rotating table 200 to rotate is less than 1μ, which is close to zero gap, which is lower than the first The μ-level measurement accuracy of the angular displacement ball grid ensures the rotation accuracy of the rotating table 200, thereby improving the processing accuracy of the workpiece.
[0058]The lower end of the swing base 700 is provided with third brackets 730 on opposite sides respectively. The third bracket 730 is a plate-shaped structure. Two third brackets 730 are symmetrically arranged on both sides of the swing base 700. The swing assembly 900 is installed on the third bracket 730. Above, the swing assembly 900 includes:
[0059]The third motor 941 is arranged downward on the upper end of the third bracket 730, the output shaft of the third motor 941 is laterally provided with a power gear 940, and the power gear 940 is located at the lower end of the third bracket 730;
[0060]A pair of speed-regulating gears 930 are meshingly connected to both sides of the power gear 940. The third bracket 730 is provided with a long through hole 731. The center of the speed-regulating gear 930 extends upwards with a mounting shaft 931. The mounting shaft 931 is arranged on the long strip. In the through hole 731;
[0061]A pair of ball screw rods 910 are vertically penetrated and arranged on both sides of the third bracket 730. The screw thread of the pair of ball screw rods 910 are screwed in opposite directions. The ball screw rods 910 are meshed and connected with the third bracket 730, and the spherical concave surface 821 The universal ball sockets 800 on both sides are each equipped with two ball sockets 822 spaced apart. The second ball socket 950 at the lower end of the ball screw 910 is restricted in the ball socket 822 by the ball screw cover 960, so that The ball screw 910 can swing freely in the ball socket 822, and a floating screw gear 920 meshing with the speed regulating gear 930 is transversely provided on the ball screw 910;
[0062]Thus, the power gear 940 meshes with each other through the speed regulating gear 930 and the floating screw gear 920 on both sides, the third motor 941 drives the power gear 940 to rotate, and the speed reduction gear 930 drives the two floating screw gears 920 in the same direction. Rotation means to drive the two ball screws 910 to rotate in the same direction. Because the screw threads of the two ball screws 910 are in opposite directions, the ball screw 910 on the first side moves upward in the third bracket 730. And the ball screw 910 on the second side is screwed down in the third bracket 730. The swing components 900 on the third brackets 730 on both sides operate synchronously, so that the third bracket 730 swings toward one side, and the ball head The second ball head 950 at the lower end of the screw rod 910 rotates and swings in the ball head seat 822. Cooperating with the swinging process of the swinging seat 700, the third motor 941 rotates forward and backward to realize the left and right swinging process of the swing seat 700 and drive the rotation. The table 200 and its work table 100 swing.
[0063]The second angular displacement ball grid 600 includes an arc-shaped ball scale 620 with a certain arc length and a third reading head 610 sleeved on the arc-shaped ball scale 620. The arc-shaped ball scale 620 is located on the universal ball seat 800 The third reading head 610 is fixed on the outside of the third bracket 730, so that the third reading head 610 and the swing assembly 900 swing synchronously to measure the swing angle of the swing assembly 900 in real time. The plane of the pair of ball screw 910 and the curved ball The plane where the scale 620 is located is parallel, and the distance between the rotation fulcrum of the third reading head 610 and the first ball head 740 is consistent with the radius of the arc ball scale 620, so that the swing trajectory of the third reading head 610 following the swing assembly 900 is consistent with the arc ball The scale 620 is the same. In this embodiment, the arc-shaped ball scale 620 has a semicircular structure, and the two ends extend upward from the universal ball seat 800. The radius of the arc-shaped ball scale 620 can be based on the third reading head 610. Adjust the swing radius.
[0064]The working principle is as follows:
[0065]The workpiece is installed on the worktable 100, and the machining tool head of the machine can be fixedly installed or movable. According to the installation position of the workpiece on the worktable 100, the location of the tool head, and the processing range and Shape, determine the required running track of the workpiece, so as to control and accurately control the running process of the whole machine. The running process of the whole machine is driven by the first motor 240, the second motor 510 and the third motor 941. A motor 240 controls the horizontal movement process of the workpiece, and the linear displacement ball grid 300 is used for real-time monitoring. The second motor 510 controls the rotation process of the workpiece. The first angular displacement ball grid 400 is used for real-time monitoring. The third motor 941 controls the workpiece. The swing process of the workpiece is monitored in real time with the second angular displacement ball grid 600. With the multi-dimensional operation and precision control of the processing machine, a full-scale spatial precision processing process of the workpiece is realized through two anti-backlash gears 530 To eliminate the rotation gap of the processed part, improve the processing efficiency and accuracy of the processed part, the multi-dimensional operation of the processing machine drives the processed part to control the processing range, shape and size, and the tool head controls the processing depth until the processing is completed. Single-sided processing of parts, a single positioning can complete all the processing procedures of a single-sided, which improves the processing efficiency and avoids the processing errors caused by multiple positioning, that is, improves the processing accuracy; simultaneously introduces multiple ball grid measurement and Under the double action of signal feedback, multi-dimensional synchronous high-precision measurement is realized, real-time measurement of the movement of the processing machine, to accurately control the processing process, and further improve the processing accuracy of the processed part, so that the original design model and processing can obtain the processed part The size is basically the same, which improves the accuracy and quality of the product, and the processing accuracy reaches the micron level.

Example Embodiment

[0066]Example two
[0067]On the basis of Example 1, such asFigure 3-5 As shown, the gapless screw base 260 is divided into a first screw base 261 and a second screw base 262 according to the center. The first screw base 261 and the second screw base 262 are provided with a plurality of waist-shaped holes on the outside. 263, the first screw seat 261 and the second screw seat 262 are installed on both sides of the screw seat hole 220 through the waist-shaped hole 263 through the nut, after the screw 230 is installed in the gapless screw seat 260, The installation positions of the screw-in screw 230 and the gap-free screw base 260 are adjusted accurately. Generally, the screw-in screw 230 and the gap-free screw base 260 have a thread pitch gap. The threaded side wall on the side of the gapless screw seat 260 is in contact. Drag the screw-in screw 230 to move in one direction. When the screw-in screw 230 moves in the other direction, it needs to be idling to move a certain thread pitch to make The screw-in screw 230 is in contact with the threaded side wall on the other side of the gapless screw seat 260, and the screw-in screw 230 is dragged to move in the other direction. This causes the screw-in screw 230 to rotate idly with a certain thread pitch gap. In order to solve this problem, the present invention first loosens the nut installed in the waist-shaped hole 263, and performs the alignment with the handwheel 250, which results in the machining error of the workpiece and affects the product quality. Reverse rotation, so that the first screw seat 261 and the second screw seat 262 each rotate a certain distance to each other, adjust the position of the nut in the waist-shaped hole 263 on the gapless screw seat successively, and connect the two separate first screws The rod seat 261 and the second screw seat 262 conflict. After the adjustment is completed, tighten the nuts on both sides so that the first screw seat 261 and the second screw seat 262 are fixed in position with the screw seat hole 220. At the same time, The screw-in screw 230 conflicts with the threaded side wall on the first side of the first screw seat 261, and the screw-in screw 230 conflicts with the threaded side wall on the second side of the second screw seat 262, so that the screw is in forward and reverse rotation. When the screw rod 230 is screwed, the screw rod 230 is in contact with the opposite side walls of the screw rod seat 260 without gap, thereby eliminating the gap of a certain thread pitch that causes the screw rod 230 to rotate idly, so that the screw rod pushes the work surface forward and backward. The movement gap is less than 1μ, close to zero gap, and is lower than the μ-level measurement accuracy of the linear displacement ball grid, ensuring the movement accuracy of the worktable 100, thereby improving the processing accuracy of the workpiece.

Example Embodiment

[0068]Example three
[0069]On the basis of the second embodiment, such asFigure 9-11 As shown, according to the curved surface characteristics of the workpiece, in order to be able to control the tilting process of the swing seat 700 with commands, select the speed regulating gear 930 with a suitable pitch circle diameter to adjust the meshing state with the floating screw gear 920 and the power gear 940, At the same time, the position of the matching movable mounting shaft 931 in the elongated through hole 731, so that the correspondingly sized speed regulating gear 930 is installed in the swing assembly, and the speed regulating gear 930, the floating screw gear 920 and the power gear 940 At the same time meshing. Specifically, if the curvature of the curved surface of the workpiece is small, increase the diameter of the speed control gear 930 to reduce the progress of the swing seat 700 and improve the accuracy of curved surface processing; if the curvature of the curved surface of the workpiece is large, decrease The diameter of the speed-regulating gear 930 is used to increase the progress of the swing seat 700 and improve the efficiency of surface processing. The swing angle is monitored in real time by the second angular displacement ball grid 600.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Shaft gear composite processing machine tool

ActiveCN103056629Areduced conversion timeImprove processing efficiency
Owner:CHONGQING MACHINE TOOL GROUP

Classification and recommendation of technical efficacy words

  • Improve processing efficiency
  • Avoid machining errors

Full-automatic cloth paving and cutting integrated machine

InactiveCN106592194AImprove processing intelligenceImprove processing efficiency
Owner:CHONGQING UNIV OF TECH

Multi-variety-shared cam-type distribution punching progressive die

ActiveCN104148501Aavoid inertiaAvoid machining errors
Owner:CANGZHOU ORBON ELECTRICAL & MECHANICAL PROD MAKING

Milling method of graphene aluminum-based composite material

ActiveCN105290470AAvoid machining errorsHigh precision milling
Owner:CHENGDU AEROSPACE JINGCHENG SCI & TECH CO LTD

Electric discharge machining jig and method

PendingCN110560812AAvoid machining errorsGuarantee processing quality
Owner:GREE ELECTRIC APPLIANCES WUHAN +1

Part precision machining device for high-end equipment manufacturing

PendingCN114454057AAvoid machining errorsHigh precision
Owner:南京智徐鑫科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products