A sand blasting device for processing an aluminum alloy workpiece and a method thereof

Abstract

The present application relates to the technical field of sand blasting, in particular to a sand blasting device for aluminum alloy workpiece machining and a method thereof, which comprises a supporting seat and a mounting frame arranged above the supporting seat, and further comprises: a vertical position adjusting mechanism arranged on the supporting seat for adjusting the position of the mounting frame in the vertical direction; a sand blasting assembly comprising a control box fixedly installed at the bottom end of the mounting frame, a plurality of rotating plates circumferentially arranged above the supporting seat, a sand blasting head arranged at the end of the rotating plate away from the control box, an angle control structure arranged on the control box for adjusting the inclination angle of the rotating plate, a sliding sleeve arranged outside the rotating plate, and a locking piece matched with the rotating plate arranged on the sliding sleeve; the sand blasting device is convenient for sand blasting treatment of the whole inner cavity of the workpiece, the distance between the sand blasting head and the inner cavity of the workpiece is always kept within a preset range, the kinetic energy of the abrasive impacting the inner cavity of the workpiece is basically consistent, and overlapping or omission is avoided, thereby realizing full coverage without dead angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sand blasting, in particular to a sand blasting device for aluminum alloy workpiece processing and a method thereof. BACKGROUND

[0002] The aluminum alloy workpiece is processed by multiple steps, and the sand blasting treatment of the aluminum alloy workpiece is very important. Through the search of the prior art, it is found that the Chinese patent with the publication number CN218137365U discloses a sand blasting treatment device for aluminum alloy parts. The operator inserts his hands into the sand blasting gloves, holds the sand blasting gun, and sprays the aluminum alloy parts. When sand blasting, the sand blasting angle can be adjusted by rotating the workpiece placing plate.

[0003] However, it is worth considering that the inner cavity of some cylindrical workpieces may also form oxide sintering or adhere to other impurities. The structure of these workpieces is a cavity structure with an opening at the top. These pollutants cannot be completely removed by conventional cleaning and purging, and still need to be treated by sand blasting. The operator can observe the sand blasting situation through the observation window, but the sand blasting gun and the operator's arm will block the operator's direct line of sight, making it impossible to see the specific position of the sand blasting gun head in the inner cavity. The operator cannot determine which areas have been processed in place and which areas are dead angles. The operator can only move the sand blasting gun back and forth based on feelings and experience, which is prone to uneven processing.

[0004] Therefore, in order to solve the above problems, a more user-friendly related facility needs to be developed. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a sand blasting device for aluminum alloy workpiece processing and a method thereof to solve the problem that the operator cannot determine which areas have been processed in place and which areas are dead angles, and can only move the sand blasting gun back and forth based on feelings and experience, which is prone to uneven processing.

[0006] In order to achieve the above purpose, the present application provides a sand blasting device for aluminum alloy workpiece processing, which comprises a support seat and a mounting frame arranged above the support seat, and further comprises:

[0007] A vertical position adjusting mechanism is arranged on the support seat for adjusting the position of the mounting frame in the vertical direction.

[0008] The sand blasting assembly comprises a control box fixedly installed at the bottom end of a mounting frame, a plurality of rotating plates circumferentially distributed above the support seat, a sand blasting head provided at the end of the rotating plate away from the control box, an angle control structure provided on the control box for adjusting the inclination angle of the rotating plate, a sliding sleeve provided outside the rotating plate, a locking piece provided on the sliding sleeve and matched with the rotating plate, a support shell fixedly connected at the end of the sliding sleeve away from the control box, a sand blasting adjusting structure provided on the support shell for adjusting the sand blasting angle of the sand blasting head, a plurality of fixed pipes fixedly connected to the mounting frame, and the fixed pipes and the corresponding sand blasting heads are connected through hoses.

[0009] A workpiece loading mechanism is arranged on the support seat and used to drive the self-rotation of the aluminum alloy workpiece to be blasted.

[0010] Optionally, the sand blasting adjusting structure comprises a first rotating shaft rotatably installed on the support shell, the sand blasting head is fixedly connected to the corresponding first rotating shaft, a first rotating disc is fixedly connected to the end of the first rotating shaft away from the sand blasting head and located in the support shell, a first support column is fixedly connected to the side of the first rotating disc away from the first rotating shaft, a first rectangular frame is slidably arranged outside the first support column, and a sliding mechanism is arranged on the control box and used to drive the first rectangular frame to slide relative to the support shell.

[0011] Optionally, the sliding mechanism comprises a sliding block slidably arranged in the sliding sleeve, the sliding block and the first rectangular frame are fixedly connected through a movable column, a tension spring is sleeved outside the movable column, the two ends of the tension spring are fixedly connected to the sliding block and the outer wall of the support shell respectively, a first lifting seat is arranged in the control box, a plurality of first hydraulic telescopic rods are fixedly connected to the control box, the telescopic ends of the first hydraulic telescopic rods are fixedly connected to the first lifting seat, a pull rope is fixedly connected to the sliding block, the pull rope penetrates through the rotating plate, and a winding unit matched with the pull rope is arranged on the first lifting seat.

[0012] Optionally, the winding unit comprises a plurality of winding rollers rotatably installed on the first lifting seat, the end of the pull rope away from the sliding block is fixedly connected to the corresponding winding roller, two limiting discs matched with the pull rope are fixedly sleeved outside the winding roller, the spacing between the adjacent two limiting discs is the same as the diameter of the pull rope, and a synchronous piece is arranged on the control box and used to drive the plurality of winding rollers to rotate.

[0013] Optionally, the synchronous piece comprises a gear fixedly sleeved outside the winding roller, a gear ring is rotatably connected to the first lifting seat and engaged with the gear, a second rotating shaft is rotatably connected in the control box, at least one guide strip is fixedly connected to the second rotating shaft, the second rotating shaft and the guide strip penetrate through one of the corresponding winding rollers, the axis of the second rotating shaft is consistent with that of the penetrated winding roller, a first servo motor is fixedly connected to the control box, and the output end of the first servo motor is fixedly connected to the top end of the second rotating shaft.

[0014] Optionally, the control box is provided with a plurality of groups of guide members, each group of guide members comprising two first guide wheels rotatably installed in the control box and four second guide wheels rotatably installed on the first lifting seat, the pull rope sequentially passes through the first guide wheels and the second guide wheels, the pull rope is guided by the adjacent four second guide wheels, so that the pull rope is guided into the adjacent two limiting discs in a direction parallel to the horizontal plane.

[0015] Optionally, the locking member comprises a plurality of bolts, a plurality of insertion holes matched with the bolts are formed on the rotating plate, the bolts pass through the sliding sleeve and the corresponding insertion holes, and the end portion of the bolt is sleeved with a nut.

[0016] Optionally, the angle control structure comprises a third rotating shaft fixedly installed on the rotating plate, the third rotating shaft is rotatably connected with the control box, one end of the third rotating shaft away from the rotating plate is fixedly connected with a second rotating disc located in the control box, one side of the second rotating disc away from the third rotating shaft is fixedly connected with a second supporting column, the second supporting column is externally sleeved with a second rectangular frame, the lower portion of the control box is provided with a second lifting seat, a plurality of second hydraulic telescopic rods are fixedly connected to the control box, and the telescopic end of the second hydraulic telescopic rod is fixedly connected with the second lifting seat, and the bottom of the second rectangular frame and the top of the second lifting seat are fixedly connected through a connecting plate.

[0017] Optionally, the object carrying mechanism comprises an object carrying disc arranged above the supporting seat, and a gear reducer is fixedly connected to the supporting seat, and the driving end of the gear reducer is fixedly connected to the bottom of the object carrying disc.

[0018] Optionally, the vertical position adjusting mechanism comprises a supporting frame fixedly installed on the top of the supporting seat, a first screw rod is rotatably connected to the top of the supporting seat, and the top end of the first screw rod is rotatably connected with the supporting frame, a second servo motor is fixedly connected to the supporting frame, the output end of the second servo motor is fixedly connected with the top end of the first screw rod, a lifting frame is sleeved on the outside of the supporting frame, the first screw rod and the lifting frame are connected in a threaded manner, a second screw rod is rotatably connected to the lifting frame, the top end of the mounting frame is slidingly connected with the lifting frame, the second screw rod and the mounting frame are connected in a threaded manner, a third servo motor is fixedly connected to the lifting frame, and the output end of the third servo motor is fixedly connected with the end portion of the second screw rod.

[0019] The application also provides a sand blasting method for aluminum alloy workpiece machining, which is applied to the sand blasting device for aluminum alloy workpiece machining and comprises the following steps:

[0020] Step one: the fixed pipe is connected with the external sand blasting machine host through the pipeline, the operator places the cylindrical aluminum alloy workpiece needing to be sand blasted on the loading mechanism, when the upper half of the inner cavity of the cylindrical aluminum alloy workpiece needs to be sand blasted, the rotating plate is driven to rotate through the angle control structure, the rotating plate drives the support shell to rotate to the upper side of the rotating plate, so that the plurality of support shells are folded together, then the mounting frame and the control box are driven to move downward through the vertical position adjusting mechanism, so that the control box and the support shell are inserted into the inner cavity of the workpiece;

[0021] Step two: the rotating plate and the support shell are driven to rotate in the opposite direction through the angle control structure, the plurality of sand blasting heads gradually move away from each other, and the sand blasting adjusting structure adjusts the sand blasting angle of the sand blasting head, so that the sand blasting port of the sand blasting head is always vertically directed to the top of the inner cavity of the workpiece, the mounting frame and the control box are driven to move upward in the vertical direction through the vertical position adjusting mechanism, so that the sand blasting head and the top of the inner cavity of the workpiece always maintain a preset distance, the loading mechanism drives the workpiece to rotate, the external sand blasting machine host is started, the abrasive enters the sand blasting head through the fixed pipe and the hose, and the inner cavity top of the workpiece can be sand blasted through the sand blasting head;

[0022] Step three: when the rotating plate and the support shell rotate to a preset position, the upper half of the side wall of the inner cavity of the workpiece needs to be sand blasted, the sand blasting head is driven to rotate relative to the support shell through the sand blasting adjusting structure, so that the sand blasting port of the sand blasting head is vertically directed to the side wall of the inner cavity of the workpiece, the mounting frame and the control box are driven to move downward in the vertical direction through the vertical position adjusting mechanism again, and the loading mechanism drives the workpiece to rotate, so that the upper half of the side wall of the inner cavity of the workpiece can be sand blasted;

[0023] Step four: when the sand blasting of the upper half of the inner cavity of the workpiece is completed, the rotating plate is driven to rotate again through the angle control structure, so that the plurality of support shells are folded together, and the control box and the sand blasting head are driven to move out of the inner cavity of the workpiece through the vertical position adjusting mechanism, after the sand blasting head is moved out of the inner cavity of the workpiece, the operator takes the workpiece off the loading mechanism, and cleans the abrasive and impurities in the inner cavity of the workpiece, then the operator places the cleaned workpiece on the loading mechanism, and drives the rotating plate to rotate through the angle control structure, so that the support shell rotates to the lower side of the rotating plate;

[0024] Step five: the control box and the sand blasting head are inserted into the inner cavity of the workpiece, and the sand blasting port of the sand blasting head is directed downward at this time, the rotating plate is driven to tilt again through the angle control structure, so that the sand blasting head moves in the horizontal direction, the sand blasting angle of the sand blasting head is adjusted through the sand blasting adjusting structure, so that the sand blasting port of the sand blasting head is always directed downward, the distance between the sand blasting head and the bottom of the inner cavity of the workpiece is controlled through the vertical position adjusting mechanism, and the workpiece to be sand blasted is driven to rotate through the loading mechanism, so that the entire bottom of the inner cavity of the workpiece can be sand blasted;

[0025] Step six: when the rotating plate and the supporting shell rotate to the preset position, the lower half of the side wall of the inner cavity of the workpiece needs to be sandblasted, the sandblasting head is driven to rotate relative to the supporting shell through the sandblasting adjusting structure, so that the sandblasting nozzle of the sandblasting head vertically faces the side wall of the inner cavity of the workpiece, the mounting frame and the control box are vertically moved upward again through the vertical position adjusting mechanism, and the workpiece is driven to rotate by the load mechanism, so that the lower half of the side wall of the inner cavity of the workpiece can be sandblasted.

[0026] The beneficial effects of the present application are as follows: the angle control structure drives the rotating plate and the supporting shell to rotate reversely, the sand blasting heads gradually move away from each other, the sand blasting adjusting structure adjusts the sand blasting angle of the sand blasting head, so that the sand blasting nozzle of the sand blasting head is always vertically directed to the top of the inner cavity of the workpiece, the vertical position adjusting mechanism drives the mounting frame and the control box to move upward in the vertical direction, so that the sand blasting head and the top of the inner cavity of the workpiece always maintain a preset distance, the workpiece is driven to rotate by the workpiece carrying mechanism, and the main machine of the external sand blasting machine is started, so that the sand blasting head can be used to sand different positions on the top of the inner cavity of the workpiece, when the rotating plate and the supporting shell rotate to a preset position and the upper half of the side wall of the inner cavity of the workpiece needs to be sand blasted, the sand blasting head is driven to rotate relative to the supporting shell through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head is vertically directed to the side wall of the inner cavity of the workpiece, the mounting frame and the control box are driven to move downward in the vertical direction through the vertical position adjusting mechanism, and the workpiece is driven to rotate by the workpiece carrying mechanism, so that the upper half of the side wall of the inner cavity of the workpiece can be sand blasted, when the sand blasting of the upper half of the inner cavity of the workpiece is completed, the rotating plate is driven to rotate again through the angle control structure, so that the supporting shells are gathered together, the control box and the sand blasting head are driven to move out of the inner cavity of the workpiece through the vertical position adjusting mechanism, after the sand blasting head moves out of the inner cavity of the workpiece, the operator takes the workpiece off the workpiece carrying mechanism and cleans the abrasive and impurities in the inner cavity of the workpiece, then the operator places the cleaned workpiece on the workpiece carrying mechanism, and the rotating plate is driven to rotate through the angle control structure, so that the supporting shells rotate to the lower side of the rotating plate, the control box and the sand blasting head are inserted into the inner cavity of the workpiece through the vertical position adjusting mechanism, and the sand blasting nozzle of the sand blasting head is directed downward at this time, and in the same way, the rotating plate is driven to tilt through the angle control structure, so that the sand blasting head moves horizontally, the sand blasting angle of the sand blasting head is adjusted through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head is always directed downward, the distance between the sand blasting head and the bottom of the inner cavity of the workpiece is controlled through the vertical position adjusting mechanism, and the workpiece carrying mechanism is used to drive the workpiece to rotate, so that the entire bottom of the inner cavity of the workpiece can be sand blasted, in the same way, when the rotating plate and the supporting shell rotate to a preset position and the lower half of the side wall of the inner cavity of the workpiece needs to be sand blasted, the sand blasting head is driven to rotate relative to the supporting shell through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head is vertically directed to the side wall of the inner cavity of the workpiece, the mounting frame and the control box are driven to move upward in the vertical direction through the vertical position adjusting mechanism, and the workpiece is driven to rotate by the workpiece carrying mechanism, so that the lower half of the side wall of the inner cavity of the workpiece can be sand blasted, which is convenient for sand blasting treatment of the entire inner cavity of the workpiece, the distance between the sand blasting head and the inner cavity of the workpiece always maintains a preset range, the kinetic energy of the abrasive impacting the inner cavity of the workpiece is basically consistent, the processing effect is not the same due to the distance being far or near, so that a high consistency of roughness and texture is obtained on the entire inner cavity surface, overlapping or omission is avoided, full coverage without dead angles is realized, every point of the entire inner cavity experiences the same processing process, the quality uniformity is high, the process quality is guaranteed by the equipment rather than the experience and technical level of workers, and the dependence on manual skills and labor cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the following embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are merely the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the vertical position adjusting mechanism of the embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the mounting frame and the control box of the embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the inside of the control box of the embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of the synchronization piece of the embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of the second rotating shaft and the winding roller of the embodiment of the present application.

[0034] Figure 7 It is a schematic diagram of the sliding sleeve of the embodiment of the present application.

[0035] Figure 8 It is a schematic diagram of the sliding sleeve of the embodiment of the present application.

[0036] Figure 9 It is a schematic diagram of the bottom of the object carrying mechanism of the embodiment of the present application.

[0037] The marks in the drawings are:

[0038] 1, support seat; 2, mounting frame; 3, control box; 4, rotating plate; 5, sliding sleeve; 6, support shell; 7, sand blasting head; 8, fixed pipe; 9, hose; 10, first rotating shaft; 11, first rotating disc; 12, first support column; 13, first rectangular frame; 14, movable column; 15, sliding block; 16, tension spring; 17, pull rope; 18, first lifting seat; 19, first hydraulic telescopic rod; 20, winding roller; 21, limit disc; 22, gear; 23, gear ring; 24, second rotating shaft; 25, first servo motor; 26, guide bar; 27, first guide wheel; 28, second guide wheel; 29, bolt; 30, nut; 31, jack; 32, third rotating shaft; 33, second rotating disc; 34, second support column; 35, second rectangular frame; 36, second lifting seat; 37, connecting plate; 38, second hydraulic telescopic rod; 39, support frame; 40, lifting frame; 41, first lead screw; 42, second servo motor; 43, second lead screw; 44, third servo motor; 45, object carrier; 46, gear reducer. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with specific examples.

[0040] Example one, by Figure 1 and Figure 3 The present application comprises a support seat 1 and a mounting frame 2 arranged above the support seat 1, and further comprises:

[0041] A vertical position adjusting mechanism is arranged on the support seat 1 for adjusting the position of the mounting frame 2 in the vertical direction;

[0042] A sand blasting assembly comprises a control box 3 fixedly installed at the bottom end of the mounting frame 2, and a plurality of rotating plates 4 are arranged in a circumferential manner above the support seat 1, and a sand blasting head 7 is arranged at the end of the rotating plate 4 away from the control box 3, an angle control structure for adjusting the inclination angle of the rotating plate 4 is arranged on the control box 3, a sliding sleeve 5 is arranged on the outside of the rotating plate 4, a locking member matched with the rotating plate 4 is installed on the sliding sleeve 5, a support shell 6 is fixedly connected to the end of the sliding sleeve 5 away from the control box 3, and a sand blasting adjusting structure for adjusting the sand blasting angle of the sand blasting head 7 is installed on the support shell 6, and a plurality of fixed pipes 8 are fixedly connected to the mounting frame 2, and the fixed pipes 8 and the corresponding sand blasting heads 7 are connected through hoses 9;

[0043] An object carrying mechanism is arranged on the support seat 1 for driving the self-rotation of the aluminum alloy workpiece to be sand blasted;

[0044] The fixed pipe 8 is connected with the external sand blasting machine main body through a pipeline. An operator places a cylindrical aluminum alloy workpiece that needs to be sand blasted on a supporting mechanism. The workpiece has a cavity structure with an opening at the top end. When the upper half of the inner cavity of the cylindrical aluminum alloy workpiece needs to be sand blasted, the rotating plate 4 is driven to rotate by the angle control structure. The rotating plate 4 drives the support shell 6 to rotate above the rotating plate 4, so that the support shells 6 are gathered together. Then the mounting frame 2 and the control box 3 are driven to move downward by the vertical position adjusting mechanism, so that the control box 3 and the support shell 6 are inserted into the inner cavity of the workpiece, and the sand blasting head 7 has the sand blasting opening facing upward. At this time, the rotating plate 4 and the support shell 6 are driven to rotate in the opposite direction by the angle control structure. The sand blasting heads 7 gradually move away from each other, and the sand blasting adjusting structure adjusts the sand blasting angle of the sand blasting head 7, so that the sand blasting opening of the sand blasting head 7 is always perpendicular to the top of the inner cavity of the workpiece. At the same time, the mounting frame 2 and the control box 3 are driven to move upward in the vertical direction by the vertical position adjusting mechanism, so that the sand blasting head 7 and the top of the inner cavity of the workpiece always maintain a predetermined distance. The supporting mechanism drives the workpiece to rotate. The external sand blasting machine main body is started. The abrasive enters the sand blasting head 7 through the fixed pipe 8 and the hose 9. The inner cavity of the workpiece can be sand blasted by the sand blasting head 7. When the rotating plate 4 and the support shell 6 rotate to a predetermined position, the sand blasting head 7 is driven to rotate relative to the support shell 6 by the sand blasting adjusting structure, so that the sand blasting opening of the sand blasting head 7 is perpendicular to the side wall of the inner cavity of the workpiece. The mounting frame 2 and the control box 3 are driven to move downward in the vertical direction by the vertical position adjusting mechanism again. The workpiece is driven to rotate by the supporting mechanism. The upper half of the side wall of the inner cavity of the workpiece can be sand blasted. When the sand blasting of the upper half of the inner cavity of the workpiece is completed, the rotating plate 4 is driven to rotate by the angle control structure again, so that the support shells 6 are gathered together. At the same time, the control box 3 and the sand blasting head 7 are driven to move out of the inner cavity of the workpiece by the vertical position adjusting mechanism. After the sand blasting head 7 moves out of the inner cavity of the workpiece, the operator takes the workpiece off the supporting mechanism and cleans the abrasive and impurities in the inner cavity of the workpiece. Then the operator places the cleaned workpiece on the supporting mechanism. The rotating plate 4 is driven to rotate by the angle control structure, so that the support shell 6 rotates below the rotating plate 4. The control box 3 and the sand blasting head 7 are inserted into the inner cavity of the workpiece by the vertical position adjusting mechanism. At this time, the sand blasting opening of the sand blasting head 7 faces downward. Similarly, the rotating plate 4 is driven to tilt by the angle control structure, so that the sand blasting head 7 moves horizontally. The sand blasting angle of the sand blasting head 7 is adjusted by the sand blasting adjusting structure, so that the sand blasting opening of the sand blasting head 7 always faces downward. The distance between the sand blasting head 7 and the bottom of the inner cavity of the workpiece is adjusted by the vertical position adjusting mechanism. The workpiece to be sand blasted is driven to rotate by the supporting mechanism. The entire bottom of the inner cavity of the workpiece can be sand blasted. Similarly, when the rotating plate 4 and the support shell 6 rotate to a predetermined position, the sand blasting head 7 is driven to rotate relative to the support shell 6 by the sand blasting adjusting structure, so that the sand blasting opening of the sand blasting head 7 is perpendicular to the lower half of the side wall of the inner cavity of the workpiece.The sand blasting head 7 is perpendicular to the side wall of the inner cavity of the workpiece, the mounting frame 2 and the control box 3 are driven to move upward in the vertical direction through the vertical position adjusting mechanism, and the workpiece is driven to rotate, so that the lower half of the side wall of the inner cavity of the workpiece can be sand blasted, the entire inner cavity of the workpiece can be sand blasted, the distance between the sand blasting head 7 and the inner cavity of the workpiece is always kept in a predetermined range, the kinetic energy of the abrasive impacting the inner cavity of the workpiece is basically consistent, the processing effect is not inconsistent due to the distance being far or near, and therefore the roughness and texture of the entire inner cavity surface are highly consistent, overlapping or omission is avoided, full coverage without dead angle is achieved, each point of the entire inner cavity experiences the same processing process, the quality uniformity is high, the process quality is guaranteed by the equipment rather than the experience and technical level of workers, the dependence on artificial skills and the labor cost are reduced.

[0045] In example two, on the basis of example one, Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8The sand blasting adjusting structure comprises a first rotating shaft 10 rotatably arranged on the support shell 6, the sand blasting head 7 and the corresponding first rotating shaft 10 are fixedly connected, the first rotating shaft 10 is fixedly connected with a first rotating disc 11 located in the support shell 6 at the end away from the sand blasting head 7, the first rotating disc 11 is fixedly connected with a first support column 12 at the side away from the first rotating shaft 10, the first support column 12 is slidably sleeved with a first rectangular frame 13, the control box 3 is provided with a sliding mechanism for driving the first rectangular frame 13 to slide relative to the support shell 6, the sliding mechanism comprises a sliding block 15 slidably arranged in the sliding sleeve 5, the sliding block 15 and the first rectangular frame 13 are fixedly connected through an activity column 14, the activity column 14 is sleeved with a tensile spring 16 at the outside, the two ends of the tensile spring 16 are fixedly connected with the sliding block 15 and the outer wall of the support shell 6 respectively, the control box 3 is provided with a first lifting seat 18, the control box 3 is fixedly connected with a plurality of first hydraulic telescopic rods 19, and the telescopic ends of the first hydraulic telescopic rods 19 are fixedly connected with the first lifting seat 18, the sliding block 15 is fixedly connected with a pull rope 17, and the pull rope 17 penetrates through the rotating plate 4, the first lifting seat 18 is provided with a winding unit matched with the pull rope 17, the winding unit comprises a plurality of winding rollers 20 rotatably arranged on the first lifting seat 18, the end of the pull rope 17 away from the sliding block 15 is fixedly connected with the corresponding winding roller 20, the outside of the winding roller 20 is fixedly sleeved with two limiting discs 21 matched with the pull rope 17, and the spacing between the adjacent two limiting discs 21 is the same as the diameter of the pull rope 17, the control box 3 is provided with a synchronous part for driving the plurality of winding rollers 20 to rotate, the synchronous part comprises a gear 22 fixedly sleeved at the outside of the winding roller 20, the first lifting seat 18 is rotatably connected with a gear ring 23, and the gear 22 and the gear ring 23 are engaged, the control box 3 is rotatably connected with a second rotating shaft 24, at least one guide strip 26 is fixedly connected on the second rotating shaft 24, and the second rotating shaft 24 and the guide strip 26 penetrate through the corresponding winding roller 20, the second rotating shaft 24 and the penetrated winding roller 20 are coaxial, the control box 3 is fixedly connected with a first servo motor 25, and the output end of the first servo motor 25 is fixedly connected with the top end of the second rotating shaft 24, the control box 3 is provided with a plurality of groups of guide parts, each group of guide parts comprises two first guide wheels 27 rotatably arranged in the control box 3 and four second guide wheels 28 rotatably arranged on the first lifting seat 18, the pull rope 17 penetrates through the first guide wheel 27 and the second guide wheel 28 in sequence, the pull rope 17 is guided through the adjacent four second guide wheels 28, so that the pull rope 17 is guided into the adjacent two limiting discs 21 in the direction parallel to the horizontal plane, the locking part comprises a plurality of bolts 29, a plurality of insertion holes 31 matched with the bolts 29 are formed in the rotating plate 4, the bolts 29 penetrate through the sliding sleeve 5 and the corresponding insertion holes 31, and the end of the bolt 29 is sleeved with a nut 30;

[0046] The first lifting seat 18 is driven to move vertically by the first hydraulic telescopic rod 19, and the first lifting seat 18 drives the corresponding one of the winding rollers 20 to slide relative to the second rotating shaft 24 and the guide strip 26, while the first lifting seat 18 drives the winding roller 20 and the second guide wheel 28 to move vertically, the second guide wheel 28 moves vertically relative to the first guide wheel 27, the distance between the second guide wheel 28 and the first guide wheel 27 is changed, and then the winding roller 20 pulls the sliding block 15, the movable column 14 and the first rectangular frame 13 relative to the support shell 6 through the pull rope 17, the first rectangular frame 13 pushes the first support column 12 to slide in the first rectangular frame 13, the first support column 12, the first rotating disc 11 and the first rotating shaft 10 rotate relative to the support shell 6, the support shell 6 can drive the sand blasting port of the sand blasting head 7 to face different directions, and the tension spring 16 is in a stretched state, the tension spring 16 applies a pulling force to the pull rope 17 through the sliding block 15, so that the pull rope 17 always remains straight, when processing workpieces of different specifications, the operator drives the nut 30 to rotate, so that the nut 30 is separated from the bolt 29, the operator drives the bolt 29 to separate from the sliding sleeve 5 and the insertion hole 31, the operator drives the sliding sleeve 5 to slide relative to the rotating plate 4, the distance between the sand blasting head 7 and the control box 3 is changed, after the position adjustment of the sand blasting head 7 is completed, the operator drives the bolt 29 to penetrate through the sliding sleeve 5 and the corresponding insertion hole 31, the operator drives the nut 30 to rotate and be arranged outside the bolt 29, through the cooperation of the bolt 29 and the nut 30, the sliding sleeve 5 is fixed relative to the rotating plate 4, when the support shell 6 and the sliding sleeve 5 need to be moved relative to the rotating plate 4, the second rotating shaft 24 is driven to rotate by the first servo motor 25, the second rotating shaft 24 drives the winding roller 20 and the gear 22 to rotate through the guide strip 26, the gear 22 drives other gears 22 and winding rollers 20 to rotate through the gear ring 23, that is, the length of the pull rope 17 wound on the winding roller 20 can be changed, the pull rope 17 is guided by the adjacent four second guide wheels 28, so that the pull rope 17 is introduced between the adjacent two limiting discs 21 in a direction parallel to the horizontal plane, the pull rope 17 can be conveniently wound and unwound, the length of the pull rope 17 located in the sliding sleeve 5 can be adjusted according to the position of the support shell 6 relative to the control box 3, so that different specifications of aluminum alloy workpieces can be conveniently sand blasted.

[0047] In example three, on the basis of example one, Figure 3 and Figure 4The angle control structure comprises a third rotating shaft 32 fixedly installed on the rotating plate 4, and the third rotating shaft 32 is rotationally connected with the control box 3, one end of the third rotating shaft 32 away from the rotating plate 4 is fixedly connected with a second rotating disc 33 located in the control box 3, one side of the second rotating disc 33 away from the third rotating shaft 32 is fixedly connected with a second support column 34, the second support column 34 is slidably sleeved with a second rectangular frame 35, the lower portion of the control box 3 is provided with a second lifting seat 36, the control box 3 is fixedly connected with a plurality of second hydraulic telescopic rods 38, and the telescopic end of the second hydraulic telescopic rod 38 is fixedly connected with the second lifting seat 36, and the bottom of the second rectangular frame 35 and the top of the second lifting seat 36 are fixedly connected through a connecting plate 37;

[0048] The second lifting seat 36 is driven in the vertical direction by the second hydraulic telescopic rod 38, the second lifting seat 36 drives the second rectangular frame 35 to move in the vertical direction through the connecting plate 37, the second rectangular frame 35 can drive the second support column 34 to slide in the second rectangular frame 35, so that the second support column 34 drives the second rotating disc 33 and the third rotating shaft 32 to rotate, and the third rotating shaft 32 can drive the rotating plate 4 to rotate through the third rotating shaft 32, so that the inclination angles of the plurality of rotating plates 4 can be synchronously changed.

[0049] In the embodiment four, based on the embodiment one, Figure 1 、 Figure 2 and Figure 9 The object carrying mechanism comprises an object carrying disc 45 arranged above the support seat 1, the support seat 1 is fixedly connected with a gear reducer 46, and the driving end of the gear reducer 46 is fixedly connected with the bottom of the object carrying disc 45, the vertical position adjusting mechanism comprises a support frame 39 fixedly installed on the top of the support seat 1, the top of the support seat 1 is rotationally connected with a first lead screw 41, the top end of the first lead screw 41 is rotationally connected with the support frame 39, the support frame 39 is fixedly connected with a second servo motor 42, the output end of the second servo motor 42 is fixedly connected with the top end of the first lead screw 41, the support frame 39 is slidably sleeved with a lifting frame 40, the connection between the first lead screw 41 and the lifting frame 40 is screw connection, the lifting frame 40 is rotationally connected with a second lead screw 43, the top end of the mounting frame 2 is slidably connected with the lifting frame 40, the connection between the second lead screw 43 and the mounting frame 2 is screw connection, the lifting frame 40 is fixedly connected with a third servo motor 44, and the output end of the third servo motor 44 is fixedly connected with the end portion of the second lead screw 43;

[0050] The operator places the aluminum alloy workpiece needing sandblasting on the carrier disc 45, drives the carrier disc 45 to rotate relative to the support base 1 through the gear reducer 46, and the carrier disc 45 can drive the aluminum alloy workpiece to rotate. The first lead screw 41 is driven to rotate through the second servo motor 42, and the first lead screw 41 can drive the lifting frame 40 to slide in the vertical direction relative to the support frame 39, thereby changing the height of the mounting frame 2 and the control box 3. When the top of the aluminum alloy workpiece needs to be sandblasted, the vertical position adjusting mechanism drives the control box 3 and the sandblasting head 7 to move above the workpiece. The rotating plate 4 is driven to rotate in the reverse direction through the angle control structure, so that the support shell 6 is rotated to be directly below the rotating plate 4, and the sandblasting head 7 is directed downward at this time. The rotating plate 4 is driven to tilt again through the angle control structure, so that the sandblasting head 7 moves horizontally. The sandblasting angle of the sandblasting head 7 is adjusted through the sandblasting adjusting structure, so that the sandblasting port of the sandblasting head 7 is always directed downward. The distance between the sandblasting head 7 and the top of the workpiece is controlled through the vertical position adjusting mechanism, and the aluminum alloy workpiece to be sandblasted is driven to rotate through the carrier mechanism. The entire top of the workpiece can be sandblasted. When the outer wall of the workpiece needs to be sandblasted, the rotating plate 4 is tilted through the angle control structure, so that the plurality of support shells 6 are gathered together, and the support shells 6 are located above the rotating plate 4. The second lead screw 43 is driven to rotate through the third servo motor 44, so that the second lead screw 43 drives the mounting frame 2 and the control box 3 to slide relative to the lifting frame 40. The first lead screw 41 is driven to rotate through the second servo motor 42, so that the lifting frame 40 drives the mounting frame 2 and the control box 3 to move downward. The mounting frame 2 and the control box 3 are moved to the side of the workpiece. The sandblasting angle of the sandblasting head 7 is adjusted through the sandblasting adjusting structure, so that the sandblasting port of one of the sandblasting heads 7 is vertically directed to the side wall of the workpiece. At this time, the aluminum alloy workpiece to be sandblasted is driven to rotate through the carrier mechanism, and the control box 3 and the sandblasting head 7 are driven to move in the vertical direction through the second servo motor 42 driving the first lead screw 41. The different positions on the outer wall of the aluminum alloy workpiece can be sandblasted.

[0051] The embodiment also provides a sandblasting method for aluminum alloy workpiece machining, which is applied to the sandblasting device for aluminum alloy workpiece machining as described above and includes the following steps.

[0052] Step one: The fixed pipe 8 is connected to the sandblasting machine main body outside through a pipeline. The operator places the cylindrical aluminum alloy workpiece needing sandblasting on the carrier mechanism. When the upper half of the inner cavity of the cylindrical aluminum alloy workpiece needs to be sandblasted, the rotating plate 4 is driven to rotate through the angle control structure. The rotating plate 4 drives the support shell 6 to rotate to the upper side of the rotating plate 4, so that the plurality of support shells 6 are gathered together. Then the mounting frame 2 and the control box 3 are driven to move downward through the vertical position adjusting mechanism, so that the control box 3 and the support shell 6 are inserted into the inner cavity of the workpiece.

[0053] Step two: drive the rotating plate 4 and the support shell 6 to rotate reversely through the angle control structure, the sand blasting heads 7 gradually move away from each other, the sand blasting adjusting structure adjusts the sand blasting angle of the sand blasting heads 7, so that the sand blasting nozzles of the sand blasting heads 7 are always vertically directed to the top of the inner cavity of the workpiece, the vertical position adjusting mechanism drives the mounting frame 2 and the control box 3 to move upward in the vertical direction, so that the sand blasting heads 7 and the top of the inner cavity of the workpiece always maintain a preset distance, the workpiece is driven to rotate by the material loading mechanism, the external sand blasting machine is started, and the abrasive enters the sand blasting heads 7 through the fixed pipe 8 and the hose 9, so that the sand blasting heads 7 can be used to sand different positions on the top of the inner cavity of the workpiece.

[0054] Step three: when the rotating plate 4 and the support shell 6 rotate to a preset position, the upper half of the side wall of the inner cavity of the workpiece needs to be sandblasted, the sand blasting head 7 is driven to rotate relative to the support shell 6 through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head 7 is vertically directed to the side wall of the inner cavity of the workpiece, the mounting frame 2 and the control box 3 are driven to move downward in the vertical direction through the vertical position adjusting mechanism again, and the workpiece is driven to rotate by the material loading mechanism, so that the upper half of the side wall of the inner cavity of the workpiece can be sandblasted.

[0055] Step four: after the sandblasting of the upper half of the inner cavity of the workpiece is completed, the rotating plate 4 is driven to rotate through the angle control structure again, so that the support shells 6 are gathered together, and the control box 3 and the sand blasting head 7 are driven to move out of the inner cavity of the workpiece by the vertical position adjusting mechanism, after the sand blasting head 7 is removed from the inner cavity of the workpiece, the operator takes the workpiece off the material loading mechanism and cleans the abrasive and impurities in the inner cavity of the workpiece, then the operator places the cleaned workpiece on the material loading mechanism, and drives the rotating plate 4 to rotate through the angle control structure, so that the support shell 6 rotates to the position directly below the rotating plate 4.

[0056] Step five: the control box 3 and the sand blasting head 7 are inserted into the inner cavity of the workpiece through the vertical position adjusting mechanism, and the sand blasting nozzle of the sand blasting head 7 is directed downward at this time, the rotating plate 4 is driven to tilt through the angle control structure again, so that the sand blasting head 7 moves horizontally, the sand blasting angle of the sand blasting head 7 is adjusted through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head 7 is always directed downward, the distance between the sand blasting head 7 and the bottom of the inner cavity of the workpiece is controlled through the vertical position adjusting mechanism, and the workpiece to be sandblasted is driven to rotate by the material loading mechanism, so that the entire bottom of the inner cavity of the workpiece can be sandblasted.

[0057] Step six: when the rotating plate 4 and the support shell 6 rotate to a preset position, the lower half of the side wall of the inner cavity of the workpiece needs to be sandblasted, the sand blasting head 7 is driven to rotate relative to the support shell 6 through the sand blasting adjusting structure, so that the sand blasting nozzle of the sand blasting head 7 is vertically directed to the side wall of the inner cavity of the workpiece, the mounting frame 2 and the control box 3 are driven to move upward in the vertical direction through the vertical position adjusting mechanism again, and the workpiece is driven to rotate by the material loading mechanism, so that the lower half of the side wall of the inner cavity of the workpiece can be sandblasted.

[0058] Those skilled in the art should understand that the above discussion of any embodiment is only intended to be exemplary in nature and is not intended to suggest that the present application is limited to these examples; under the concept of the present application, the above embodiments or technical features among different embodiments can be combined, steps can be implemented in any order, and there are many other variations of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

Claims

1. A sandblasting device for processing aluminum alloy workpieces, comprising a support base (1) and a mounting bracket (2) disposed above the support base (1), characterized in that, Also includes: A vertical position adjustment mechanism is provided on the support base (1) to adjust the vertical position of the mounting bracket (2); The sandblasting assembly includes a control box (3) fixedly installed at the bottom of the mounting frame (2), a number of rotating plates (4) arranged in a circle above the support base (1), a sandblasting head (7) is provided at the end of the rotating plate (4) away from the control box (3), an angle control structure for adjusting the tilt angle of the rotating plate (4) is provided on the control box (3), a sliding sleeve (5) is provided on the outer sliding sleeve of the rotating plate (4), a locking part adapted to the rotating plate (4) is installed on the sliding sleeve (5), a support shell (6) is fixedly connected at the end of the sliding sleeve (5) away from the control box (3), a sandblasting adjustment structure for adjusting the sandblasting angle of the sandblasting head (7) is installed on the support shell (6), and a number of fixed pipes (8) are fixedly connected on the mounting frame (2), and the fixed pipes (8) and the corresponding sandblasting head (7) are connected by a hose (9). The loading mechanism is set on the support base (1) and is used to drive the aluminum alloy workpiece to be sandblasted to rotate. The sandblasting adjustment structure includes a first rotating shaft (10) rotatably mounted on the support shell (6), and a sandblasting head (7) and a corresponding first rotating shaft (10) are fixedly connected. The end of the first rotating shaft (10) away from the sandblasting head (7) is fixedly connected to a first turntable (11) located inside the support shell (6). The side of the first turntable (11) away from the first rotating shaft (10) is fixedly connected to a first support column (12). A first rectangular frame (13) is slidably sleeved on the outside of the first support column (12). A sliding mechanism for driving the first rectangular frame (13) to slide relative to the support shell (6) is installed on the control box (3). The sliding mechanism includes a slider (15) slidably disposed in a sliding sleeve (5). The slider (15) and the first rectangular frame (13) are fixedly connected by a movable column (14). A tension spring (16) is sleeved on the outside of the movable column (14). The two ends of the tension spring (16) are fixedly connected to the outer walls of the slider (15) and the support shell (6), respectively. A first lifting seat (18) is provided in the control box (3). Several first hydraulic telescopic rods (19) are fixedly connected on the control box (3). The telescopic ends of the first hydraulic telescopic rods (19) are fixedly connected to the first lifting seat (18). A pull rope (17) is fixedly connected on the slider (15). The pull rope (17) passes through the rotating plate (4). A winding unit adapted to the pull rope (17) is provided on the first lifting seat (18).

2. The sandblasting device for processing aluminum alloy workpieces according to claim 1, characterized in that, The winding unit includes several winding rollers (20) rotatably mounted on the first lifting seat (18). The end of the pull rope (17) away from the slider (15) is fixedly connected to the corresponding winding roller (20). The winding roller (20) is externally fixedly fitted with two limiting discs (21) that are compatible with the pull rope (17), and the distance between two adjacent limiting discs (21) is the same as the diameter of the pull rope (17). The control box (3) is equipped with a synchronizing element for driving the rotation of several winding rollers (20).

3. The sandblasting device for machining aluminum alloy workpieces according to claim 2, characterized in that, The synchronizing element includes a gear (22) fixedly sleeved on the outside of the take-up roller (20), a gear ring (23) rotatably connected to the first lifting seat (18), and the gear (22) and the gear ring (23) meshing with each other. A second rotating shaft (24) is rotatably connected inside the control box (3), and at least one guide bar (26) is fixedly connected to the second rotating shaft (24). The second rotating shaft (24) and the guide bar (26) pass through one of the corresponding take-up rollers (20). The axis of the second rotating shaft (24) and the taken-up roller (20) that is passed through are aligned. A first servo motor (25) is fixedly connected to the control box (3), and the output end of the first servo motor (25) is fixedly connected to the top end of the second rotating shaft (24).

4. The sandblasting device for machining aluminum alloy workpieces according to claim 2, characterized in that, The control box (3) is provided with several sets of guide components. Each set of guide components includes two first guide wheels (27) rotatably mounted in the control box (3) and four second guide wheels (28) rotatably mounted on the first lifting seat (18). The pull rope (17) passes through the first guide wheel (27) and the second guide wheel (28) in sequence. The pull rope (17) is guided by the four adjacent second guide wheels (28) so that the pull rope (17) is guided between two adjacent limit discs (21) in a direction parallel to the horizontal plane.

5. The sandblasting device for machining aluminum alloy workpieces according to claim 1, characterized in that, The locking component includes several bolts (29), and the rotating plate (4) has several insertion holes (31) that cooperate with the bolts (29). The bolts (29) pass through the sliding sleeve (5) and the corresponding insertion holes (31), and the ends of the bolts (29) are fitted with nuts (30).

6. The sandblasting device for machining aluminum alloy workpieces according to claim 1, characterized in that, The angle control structure includes a third rotating shaft (32) fixedly installed on the rotating plate (4), and the third rotating shaft (32) is rotatably connected to the control box (3). The end of the third rotating shaft (32) away from the rotating plate (4) is fixedly connected to a second turntable (33) located inside the control box (3). The side of the second turntable (33) away from the third rotating shaft (32) is fixedly connected to a second support column (34). A second rectangular frame (35) is slidably fitted on the outside of the second support column (34). A second lifting seat (36) is provided below the control box (3). Several second hydraulic telescopic rods (38) are fixedly connected on the control box (3), and the telescopic ends of the second hydraulic telescopic rods (38) are fixedly connected to the second lifting seat (36). The bottom of the second rectangular frame (35) and the top of the second lifting seat (36) are fixedly connected through a connecting plate (37).

7. The sandblasting device for machining aluminum alloy workpieces according to claim 1, characterized in that, The loading mechanism includes a loading tray (45) disposed above the support base (1), and a gear reducer (46) is fixedly connected to the support base (1), and the drive end of the gear reducer (46) is fixedly connected to the bottom of the loading tray (45).

8. The sandblasting device for machining aluminum alloy workpieces according to claim 1, characterized in that, The vertical position adjustment mechanism includes a support frame (39) fixedly installed on the top of the support base (1). The top of the support base (1) is rotatably connected to a first lead screw (41), and the top end of the first lead screw (41) is rotatably connected to the support frame (39). A second servo motor (42) is fixedly connected to the support frame (39), and the output end of the second servo motor (42) is fixedly connected to the top end of the first lead screw (41). A lifting frame (40) is slidably sleeved on the outside of the support frame (39), and the connection between the first lead screw (41) and the lifting frame (40) is a threaded connection. A second lead screw (43) is rotatably connected to the lifting frame (40). The top end of the mounting frame (2) is slidably connected to the lifting frame (40), and the connection between the second lead screw (43) and the mounting frame (2) is a threaded connection. A third servo motor (44) is fixedly connected to the lifting frame (40), and the output end of the third servo motor (44) is fixedly connected to the end of the second lead screw (43).

9. A sandblasting method for machining aluminum alloy workpieces, applied to the sandblasting apparatus for machining aluminum alloy workpieces as described in claim 1, characterized in that: Includes the following steps: Step 1: The fixed pipe (8) is connected to the external sandblasting machine host through a pipe. The operator places the cylindrical aluminum alloy workpiece to be sandblasted on the loading mechanism. When the upper half of the inner cavity of the cylindrical aluminum alloy workpiece needs to be sandblasted, the rotating plate (4) is driven to rotate through the angle control structure. The rotating plate (4) drives the support shell (6) to rotate above the rotating plate (4) so ​​that several support shells (6) are gathered together. Then, the mounting frame (2) and control box (3) are driven to move down through the vertical position adjustment mechanism so that the control box (3) and support shell (6) are inserted into the inner cavity of the workpiece. Step 2: Drive the rotating plate (4) and the support shell (6) to rotate in opposite directions through the angle control structure. The sandblasting heads (7) gradually move away from each other. At the same time, the sandblasting adjustment structure adjusts the sandblasting angle of the sandblasting head (7) so that the sandblasting nozzle of the sandblasting head (7) is always vertically facing the top of the inner cavity of the workpiece. At the same time, the vertical position adjustment mechanism drives the mounting frame (2) and the control box (3) to move vertically upward so that the sandblasting head (7) and the top of the inner cavity of the workpiece always maintain a preset distance. The loading mechanism drives the workpiece to rotate. The external sandblasting machine host starts. The abrasive enters the sandblasting head (7) through the fixed pipe (8) and the hose (9). The sandblasting head (7) can then be used to sandblast different positions on the top of the inner cavity of the workpiece. Step 3: When the rotating plate (4) and the support shell (6) rotate to the preset position, and it is necessary to sandblast the upper half of the side wall of the inner cavity of the workpiece, the sandblasting head (7) is driven to rotate relative to the support shell (6) through the sandblasting adjustment structure so that the sandblasting nozzle of the sandblasting head (7) is perpendicular to the side wall of the inner cavity of the workpiece. The mounting frame (2) and the control box (3) are driven to move vertically downward again through the vertical position adjustment mechanism, and the loading mechanism drives the workpiece to rotate, so that the upper half of the side wall of the inner cavity of the workpiece can be sandblasted. Step 4: After the upper half of the workpiece cavity is sandblasted, the rotating plate (4) is driven to rotate again by the angle control structure so that several support shells (6) are gathered together. At the same time, the vertical position adjustment mechanism drives the control box (3) and the sandblasting head (7) to move out of the workpiece cavity. After the sandblasting head (7) is moved out of the workpiece cavity, the operator removes the workpiece from the loading mechanism and cleans the abrasive and impurities in the workpiece cavity. Then the operator places the cleaned workpiece on the loading mechanism and drives the rotating plate (4) to rotate by the angle control structure so that the support shell (6) rotates to the bottom of the rotating plate (4). Step 5: The vertical position adjustment mechanism drives the control box (3) and the sandblasting head (7) to be inserted into the inner cavity of the workpiece, and the sandblasting nozzle of the sandblasting head (7) is facing directly downwards at this time. The rotating plate (4) is tilted again by the angle control structure so that the sandblasting head (7) moves horizontally. The sandblasting angle of the sandblasting head (7) is adjusted by the sandblasting adjustment structure so that the sandblasting nozzle of the sandblasting head (7) always faces directly downwards. The distance between the sandblasting head (7) and the bottom of the inner cavity of the workpiece is controlled by the vertical position adjustment mechanism, and the aluminum alloy workpiece to be sandblasted is driven to rotate by the loading mechanism, so that the entire bottom of the inner cavity of the workpiece can be sandblasted. Step 6: When the rotating plate (4) and the support shell (6) rotate to the preset position, and it is necessary to sandblast the lower half of the side wall of the inner cavity of the workpiece, the sandblasting head (7) is driven to rotate relative to the support shell (6) by the sandblasting adjustment structure so that the sandblasting nozzle of the sandblasting head (7) is perpendicular to the side wall of the inner cavity of the workpiece. The mounting frame (2) and the control box (3) are driven to move vertically upward again by the vertical position adjustment mechanism, and the loading mechanism drives the workpiece to rotate, so that the lower half of the side wall of the inner cavity of the workpiece can be sandblasted.

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