CN109773230B - Hole expanding method for blind hole of machined workpiece - Google Patents
Hole expanding method for blind hole of machined workpiece Download PDFInfo
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- CN109773230B CN109773230B CN201910158264.2A CN201910158264A CN109773230B CN 109773230 B CN109773230 B CN 109773230B CN 201910158264 A CN201910158264 A CN 201910158264A CN 109773230 B CN109773230 B CN 109773230B
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Abstract
A reaming method for blind holes of machined workpieces relates to a reaming method for blind holes, and comprises the following steps: A. marking hole sites on the workpiece; B. drilling a blind hole on a workpiece by using a drill bit; C. selecting a matched expanding bit; D. preparing before reaming; E. using a hole expanding drill bit to punch an annular groove in the middle of a blind hole of a workpiece for expanding a hole; F. cleaning the blind holes; the bearing of the expanding drill bit is propped against the inner end of the blind hole, the cylinder is used as a fulcrum to obtain the bending of the other end of the connecting block and one end of the connecting sheet, and at the moment, the alloy surface of the convex block can be used for punching an annular groove in the middle of the blind hole for expanding.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a method for reaming a blind hole, in particular to a method for reaming a blind hole of a machined workpiece.
[ background of the invention ]
When a casting is processed in the field of machining, a screw cannot be arranged on the casting, so that the casting is difficult to be connected with other workpieces in later use, and the existing connection mode is that a thin plate with holes is arranged on the workpiece, and then the two workpieces are connected by using bolts; the other mode is that a screw hole is machined in a workpiece, and the connection between the two workpieces is obtained through a screw, so that the connection between the workpiece and the workpiece is extremely limited, and particularly when other various devices are required to be fixed on the workpiece, the mode of machining the screw hole in the workpiece cannot meet the actual requirement; and the screw rod installation in special needs can not be adapted.
[ summary of the invention ]
In order to overcome the defects in the background technology, the invention discloses a reaming method for machining a blind hole of a workpiece.
The technical scheme for realizing the invention is as follows:
the utility model provides a reaming method of machine tooling work piece blind hole, wherein the structure of reaming drill bit is that the one end of drilling rod is eccentric to be connected with the one end of connecting block is articulated, and the other end of connecting block is articulated with the one end of connection piece to be connected, is equipped with protruding piece in the other end outside of connecting block, the outside of protruding piece is equipped with the alloy face, and the other end of connection piece is articulated with the one end of cylinder to be connected, is equipped with the bearing at the other end of cylinder, the outer lane diameter of bearing is greater than the cylinder, the reaming method includes the:
A. marking hole sites on the workpiece;
marking hole sites on the workpiece according to a design drawing, and fixing the workpiece on a sliding bedplate of a drilling machine to enable the hole sites to correspond to the drill bits;
B. drilling a blind hole on a workpiece by using a drill bit;
starting equipment to enable the drill bit to punch holes at the marked hole positions, wherein the hole depth needs to meet the hole expanding requirement;
C. selecting a matched expanding bit;
selecting a bearing of the expanding drill bit and the diameter of the drill rod to be matched with or slightly thinner than the aperture of the blind hole;
D. preparing before reaming;
fixing the clamping end of a drill rod of the reaming bit on a drill chuck of the bench drill, and then enabling a bearing, a cylinder, a connecting sheet, a connecting block and one end of the drill rod of the reaming bit to enter the blind hole along the direction, wherein the outer ring of the bearing is propped against the outer edge wall, close to the bottom of a conical hole at the inner end of the blind hole, of the blind hole;
E. using a hole expanding drill bit to punch an annular groove in the middle of a blind hole of a workpiece for expanding a hole;
starting a main shaft of a drilling machine to drive a hole expanding drill bit to rotate, enabling a workpiece on a sliding table plate to move towards the direction of the hole expanding drill bit through a rocking wheel, enabling an outer ring of a bearing to be propped against the inner end of a blind hole, enabling an inner ring of the bearing and a drill rod of the hole expanding drill bit to rotate synchronously, bending a connecting sheet and a connecting block which are extruded at the moment, and enabling an alloy surface on a convex block to start to perform surrounding cutting on the middle of the blind hole until a ring-shaped groove which meets requirements is punched in; turning off the power supply of the drilling machine, and moving the workpiece on the sliding platen through the rocking wheel to enable the reaming bit to exit the blind hole;
F. cleaning the blind holes;
and (5) washing the blind hole by using a high-pressure water gun to finish the operation.
According to the reaming method for machining the blind hole of the workpiece, the diameter of a reaming bit is in the range of zero point eight centimeters to five centimeters; the feed depth of the drill bit is more than five centimeters.
In the step D, a cooling water pipe is arranged at the blind hole at the end part of one end of the installed broaching bit, and the cooling water is used for cooling and flushing scrap iron when the broaching bit is used for broaching.
The reaming method for machining the blind holes of the workpieces is characterized in that cutting faces B are respectively arranged on the front face and the rear face of one end of a reaming bit drill rod, a shaft hole E penetrating through the two cutting faces B is formed in one side, close to the two cutting faces B, of the two cutting faces B, a slot is formed in one end face between the two cutting faces B of the drill rod, a chip removal groove is formed in the middle of the drill rod slot to the drill rod, the slot is communicated with the chip removal groove, the slot is formed in one side face of the drill rod, namely the other side face of the drill rod is in a closed state, the shaft hole E penetrating through the two cutting faces B is formed in one side, one end of a connecting block is inserted into the slot, a shaft A penetrates through the shaft hole E, and the middle of the shaft A is located in the.
According to the reaming method for machining the blind hole of the workpiece, a clamping groove is formed in the middle of the end face of the other end, close to the other end, of a reaming bit connecting block, a shaft hole C penetrating through the connecting block is formed in the other end, close to the connecting block, one end of a connecting piece is inserted into the clamping groove, a shaft B penetrates through the shaft hole C of the connecting block, and the other end of the connecting block, which is obtained by penetrating the shaft B through the shaft hole B at one end of the connecting piece, is hinged to one end.
According to the reaming method for machining the blind hole of the workpiece, the inserting column is arranged on the end face of the other end of the reaming drill bit cylinder, and the inner ring of the bearing is fixed on the outer edge face of the inserting column.
According to the reaming method for machining the blind hole of the workpiece, a conical surface is arranged on the end face of the other end of the reaming drill bit cylinder, and the inserting column is arranged in the middle of the conical surface.
The reaming method for machining the blind hole of the workpiece is characterized in that cutting surfaces A are respectively arranged on the front face and the rear face of one end of a reaming drill bit cylinder, a groove is formed in one end of the cylinder between the two cutting surfaces A, shaft holes A penetrating through the two cutting surfaces A are formed in one sides, close to the two cutting surfaces A, of the two cutting surfaces A, the other end of a connecting sheet is inserted into the groove, a shaft C penetrates through the shaft holes A of the cylinder, and the middle of the shaft C is located in the shaft hole B at the other end of the connecting sheet to form hinged connection of the other end of the connecting.
According to the reaming method for machining the blind hole of the workpiece, the convex block is arranged on the outer side of the other end of the reaming drill bit connecting block, the outer side of the convex block is of a planar structure, the plane of the convex block and the extending direction of the other end of the connecting block axially rotate for forty degrees to sixty degrees, and alloy surfaces are arranged on the plane of the convex block and on two sides of the plane of the convex block.
According to the reaming method for machining the blind hole of the workpiece, the diameter of the outer edge of the reaming bit bearing is equal to that of the outer edge of the reaming bit drill rod.
Through the disclosure, the beneficial effects of the invention are as follows:
according to the reaming method for the blind hole of the machined workpiece, the bearing is matched with the drill rod to obtain the force applied when the annular groove is cut in the middle of the blind hole for reaming, and when the blind hole with the annular groove for reaming is used in the later stage, a snap ring which is bounced off or other structures which can fix the inserted end of the screw rod can be arranged at the inserted blind hole of the screw rod; or a special metal adhesive can be arranged in the blind hole, and an annular groove is arranged on the screw rod for fixing; the blind hole with the ring-shaped slot hole expansion is convenient for the implantation of the screw rod in the blind hole.
[ description of the drawings ]
FIG. 1 is a schematic representation of the operational steps of the present invention;
FIG. 2 is a schematic view of a reamer head assembly of the present invention;
FIG. 3 is a perspective view of the drill stem of the reamer bit of the present invention;
fig. 4 is a schematic perspective view of a connection block of the reamer bit of the present invention;
FIG. 5 is a perspective view of a coupling tab of the reamer bit of the invention;
fig. 6 is a schematic perspective view of a cylindrical body of the reamer bit of the invention;
fig. 7 is a schematic view of an extended configuration of the reamer bit of the invention;
fig. 8 is a schematic view of the structure of the reamer head of the present invention in a reaming state;
FIG. 9 is a schematic diagram of a post-reaming configuration for a workpiece using the present invention;
in the figure: 1. a bearing; 2. an inner ring; 3. inserting a column; 4. a conical surface; 5. a groove; 6. the shaft hole A; 7. a cutting face A; 8. a cylinder; 9. a shaft hole B; 10. connecting sheets; 11. a shaft hole C; 12. a raised block; 13. alloy surface; 14. connecting blocks; 15. a shaft hole D; 16. a shaft hole E; 17. a cutting face B; 18. a drill stem; 19. a slot; 20. a clamping end; 21. a card slot; 22. a chip groove; 23. an axis A; 24. a shaft B; 25. an axis C; 26. a workpiece; 27. reaming the annular groove; 28. and (4) blind holes.
[ detailed description ] embodiments
The present invention will be further illustrated with reference to the following examples; the following examples are not intended to limit the present invention, and are only used as a support for the implementation of the present invention, and any equivalent structure replacement within the technical framework of the present invention is included in the protection scope of the present invention;
the method for reaming blind holes in a machined workpiece described in conjunction with fig. 1 to 9, wherein the structure of the reaming bit is as follows:
the front and rear surfaces of one end of a drill rod 18 are respectively provided with a cutting surface B17, one side, close to the two cutting surfaces B17, of each cutting surface B17 is provided with a shaft hole E16 penetrating through the two cutting surfaces B17, one end surface between the two cutting surfaces B17 of the drill rod 18 is provided with a slot 19, a chip removal groove 22 is formed in the middle of the slot 19 of the drill rod 18 and the drill rod 18, the slot 19 is communicated with the chip removal groove 22, the slot of the slot 19 extends to one side surface of the drill rod 18, namely the other side surface of the drill rod 18 is in a closed state, one side, close to the two cutting surfaces B17, of each cutting surface B16 penetrating through the two cutting surfaces B17 is arranged, one end of a connecting block 14 is inserted into the slot 19, a shaft A23 penetrates into the shaft hole E16, one end of the shaft A23, which is positioned in the shaft hole D15 at; a clamping groove 21 is arranged from the end face of the other end of the connecting block 14 to the middle part close to the other end, a shaft hole C11 penetrating through the connecting block 14 is arranged at the other end of the connecting block 14, one end of the connecting piece 10 is inserted into the clamping groove 21, a shaft B24 penetrates through the shaft hole C11 of the connecting block 14, a shaft B24 penetrates through the shaft hole B9 at one end of the connecting piece 10 to obtain that the other end of the connecting block 14 is hinged with one end of the connecting piece 10, a protruding block 12 is arranged on the outer side of the other end of the connecting block 14, the outer side of the protruding block 12 is of a planar structure, the extending direction of the plane of the protruding block 12 and the other end of the connecting block 14 is axially rotated by forty degrees to sixty degrees, and alloy surfaces 13; the front and back surfaces of one end of the column body 8 are respectively provided with a cutting surface A7, one end of the column body 8 between the two cutting surfaces A7 is provided with a groove 5, one side, close to the two cutting surfaces A7, of each cutting surface A3925 is provided with a shaft hole A6 penetrating through the two cutting surfaces A7, the other end of the connecting piece 10 is inserted into the groove 5, a shaft C25 penetrates through the shaft hole A6 of the column body 8, and the middle part of the shaft C25 is positioned in the shaft hole B9 at the other end of the connecting piece 10 to form hinged connection of the other end of the connecting piece 10 and; the end face of the other end of the cylinder 8 is provided with a conical surface 4, the inserted cylinder 3 is arranged in the middle of the conical surface 4, the inner ring 2 of the bearing 1 is fixed on the outer edge face of the inserted cylinder 3, the diameter of the outer ring of the bearing 1 is larger than that of the cylinder 8, and the diameter of the outer edge of the bearing 1 is equal to that of the drill rod 18.
The installation process of the expanding bit comprises the following steps:
putting one end of a cylinder 8 downwards on a working table, putting an inner ring 2 of a bearing 1 on the upper part of an insert column 3, padding a wood plate on the upper part of the bearing 1, then knocking the wood plate by using a hammer to firmly fix the bearing 1 on the insert column 3, putting the other end of a connecting piece 10 into a groove 5 of the cylinder 8, enabling a shaft hole A6 of the cylinder 8 to correspond to a shaft hole B9 of the connecting piece 10, putting one cutting surface A7 of the cylinder 8 on a supporting block after a shaft C25 passes through the shaft hole A6 on the upper part of the cylinder 8, the shaft hole B9 of the connecting piece 10 and the shaft hole A6 on the lower part of the cylinder 8, and knocking two ends of the shaft C25 into; placing one end of the connecting block 14 into the slot 19 of the drill rod 18, using the shaft A23 to penetrate through the shaft hole E16 of the upper cutting surface B17 of the drill rod 18, the shaft hole D15 of one end of the connecting block 14 and the shaft hole E16 of the lower cutting surface B17 of the drill rod 18, placing one cutting surface B17 of the drill rod 18 on the supporting block, and using a hammer to roughen both ends of the shaft A23; one end of the connecting piece 10 penetrates into the clamping groove 21 at the other end of the connecting block 14, a shaft B24 penetrates through a shaft hole C11 at the upper part of the connecting block 14, a shaft hole B9 at one end of the connecting piece 10 and a shaft hole C11 at the upper part of the connecting block 14, one surface of the connecting block 14 is placed on a supporting block, and two ends of the shaft B24 are roughened by a hammer to obtain the reaming device.
The hole expanding method comprises the following steps:
A. marking hole sites on the workpiece;
marking hole sites on the workpiece according to a design drawing, and fixing the workpiece on a sliding bedplate of a drilling machine to enable the hole sites to correspond to the drill bits;
B. drilling a blind hole on a workpiece by using a drill bit;
starting equipment to enable the drill bit to punch holes at the marked hole positions, wherein the hole depth needs to meet the hole expanding requirement;
C. selecting a matched expanding bit;
the diameter of the bearing 1 of the reamer bit and the diameter of the drill rod 18 are selected to be matched with the aperture of the blind hole or slightly thinner; the diameter of the reaming bit is between the range of zero point eight centimeters and five centimeters; the feeding depth of the drill bit is more than five centimeters;
D. preparing before reaming;
fixing the clamping end 20 of the drill rod 18 of the reaming bit on the drill chuck of the bench drill, and then enabling the bearing 1, the cylinder 8, the connecting sheet 10, the connecting block 14 and one end of the drill rod 18 of the reaming bit to enter the blind hole 28, wherein the outer ring of the bearing 1 is propped against the outer edge wall, close to the bottom of the conical hole, at the inner end of the blind hole 28; a cooling water pipe is arranged at a blind hole at the end part of one end of the installed broaching bit, and the cooling water is used for cooling and flushing scrap iron when the broaching bit is used for broaching and feeding;
E. using a hole expanding drill bit to punch an annular groove in the middle of a blind hole of a workpiece for expanding a hole;
because the blind hole 28 is punched by using the drill bit, a conical surface is left at the inner end of the bottom of the blind hole 28, the outer ring of the bearing 1 is in contact with the conical surface at the bottom of the hole, and the inner ring 2 of the bearing 1 is suspended, so that the inner ring 2 of the bearing 1 is further obtained without being influenced by the bottom of the hole; starting a main shaft of a drilling machine to drive a hole expanding drill bit to rotate, enabling a workpiece on a sliding table plate to move towards the direction of the hole expanding drill bit through a rocking wheel, enabling an outer ring of a bearing 1 to be abutted against the inner end of a blind hole 28, enabling an inner ring 2 of the bearing 1 and a drill rod 18 of the hole expanding drill bit to rotate synchronously, enabling a connecting piece 10 and a connecting block 14 to be extruded to bend, and enabling an alloy surface 13 on a convex block 12 to start to perform surrounding cutting on the middle of the blind hole 28 until a ring-shaped groove hole expanding 27 meeting requirements is formed in the middle; turning off the power supply of the drilling machine, and moving the workpiece on the sliding platen through the rocking wheel to enable the reaming bit to exit the blind hole 28;
F. cleaning the blind holes;
and (5) washing the blind hole 28 by using a high-pressure water gun to finish the operation.
Further, as an extension, the drilling operation of the present application may also be performed directly using a pistol drill, i.e., in steps a and B, without fixing the workpiece on the sliding platen of the drilling machine, the blind hole is drilled using the pistol drill, and further in step C, D or E, the pistol drill operation is replaced.
The present invention is not described in detail in the prior art.
Claims (7)
1. A reaming method for blind holes of machined workpieces is characterized by comprising the following steps: wherein the structure of reaming drill bit is that the one end of drilling rod (18) is eccentric to be connected with the one end of connecting block (14) is articulated, and the other end of connecting block (14) is articulated with the one end of connection piece (10) to be connected, is equipped with protruding piece (12) in the other end outside of connecting block (14), the outside of protruding piece (12) is equipped with alloy face (13), and the other end of connecting piece (10) is articulated with the one end of cylinder (8) to be connected, is equipped with bearing (1) at the other end of cylinder (8), the outer lane diameter of bearing (1) is greater than the diameter of cylinder (8), and the reaming method includes following step:
A. marking hole sites on the workpiece;
marking hole sites on the workpiece according to a design drawing, and fixing the workpiece on a sliding bedplate of a drilling machine to enable the hole sites to correspond to the drill bits;
B. drilling a blind hole on a workpiece by using a drill bit;
starting equipment to enable the drill bit to punch holes at the marked hole positions, wherein the hole depth needs to meet the hole expanding requirement;
C. selecting a matched expanding bit;
selecting the diameter of a bearing (1) of the reaming bit and the diameter of a drill rod (18) to be matched with the bore diameter of the blind hole or slightly thinner;
D. preparing before reaming;
fixing a clamping end (20) of a reaming bit drill rod (18) on a bench drill chuck, and then enabling a bearing (1), a cylinder (8), a connecting sheet (10), a connecting block (14) and one end of the drill rod (18) of the reaming bit to enter a blind hole (28) in a forward direction, wherein the outer ring of the bearing (1) is propped against the outer edge wall, close to the bottom of a conical hole at the inner end of the blind hole (28);
E. using a hole expanding drill bit to punch an annular groove in the middle of a blind hole of a workpiece for expanding a hole;
starting a main shaft of a drilling machine to drive a hole expanding drill bit to rotate, enabling a workpiece on a sliding table plate to move towards the direction of the hole expanding drill bit through a rocking wheel, enabling an outer ring of a bearing (1) to be abutted against the inner end of a blind hole (28), enabling an inner ring (2) of the bearing (1) and a drill rod (18) of the hole expanding drill bit to rotate synchronously, enabling a connecting piece (10) which is extruded to be bent with a connecting block (14), and enabling an alloy surface (13) on a convex block (12) to start to perform surrounding cutting on the middle of the blind hole (28) until a ring-shaped groove hole expanding hole (27) meeting requirements is formed in the middle of; turning off the power supply of the drilling machine, and moving the workpiece on the sliding platen through the rocking wheel to enable the reaming bit to exit the blind hole (28);
F. cleaning the blind holes;
flushing the blind hole (28) by using a high-pressure water gun to finish the operation;
the front and rear surfaces of one end of a reaming bit cylinder (8) are respectively provided with a cutting surface A (7), one end of the cylinder (8) between the two cutting surfaces A (7) is provided with a groove (5), one side, close to the two cutting surfaces A (7), of each cutting surface A is provided with a shaft hole A (6) penetrating through the two cutting surfaces A (7), the other end of a connecting sheet (10) is inserted into the groove (5), a shaft C (25) penetrates through the shaft hole A (6) of the cylinder (8), and the middle part of the shaft C (25) is positioned in the shaft hole B (9) at the other end of the connecting sheet (10) to form hinged connection of the other end of the connecting sheet (10) and one end of the cylinder (8);
a convex block (12) is arranged on the outer side of the other end of the reaming bit connecting block (14), the outer side of the convex block (12) is of a plane structure, and alloy surfaces (13) are arranged on the plane of the convex block (12) and on two sides of the plane;
the diameter of the outer edge of the reaming bit bearing (1) is equal to that of the outer edge of the reaming bit drill rod (18).
2. The method of reaming blind holes in a machined workpiece of claim 1, wherein: the diameter of the reaming bit is between the range of zero point eight centimeters and five centimeters; the feed depth of the drill bit is more than five centimeters.
3. The method of reaming blind holes in a machined workpiece of claim 1, wherein: and D, arranging a cooling water pipe at the blind hole at the end part of one end of the installed broaching bit, and cooling by cooling water and flushing scrap iron when the broaching bit is subjected to broaching feeding.
4. The method of reaming blind holes in a machined workpiece of claim 1, wherein: the front and back faces of one end of a reamer bit drill rod (18) are respectively provided with a cutting face B (17), one side, close to the two cutting faces B (17), of each cutting face B (17) is provided with a shaft hole E (16) penetrating through the two cutting faces B (17), one end face between the two cutting faces B (17) of the drill rod (18) is provided with a slot (19), the middle part of the drill rod (18) from the slot (19) to the drill rod (18) is provided with a chip discharge groove (22), the slot (19) is communicated with the chip discharge groove (22), the slot of the slot (19) is communicated with one side face of the drill rod (18), namely the other side face of the drill rod (18) is in a closed state, one side, close to the two cutting faces B (17), of the shaft hole E (16) penetrating through the two cutting faces B (17) is arranged, one end of a connecting block (14) is inserted into the slot (19), a shaft A (23) penetrates through the shaft hole E (16), and the middle part of the shaft A (23) is positioned in the Is hinged at one end.
5. The method of reaming blind holes in a machined workpiece of claim 1, wherein: be equipped with draw-in groove (21) to being close to other end middle part at the other end terminal surface of reaming drill bit connecting block (14), be equipped with shaft hole C (11) that link up connecting block (14) near the other end of connecting block (14), insert the one end of connection piece (10) in draw-in groove (21), wear connecting block (14) by axle B (24) in shaft hole C (11), the other end that obtains connecting block (14) in shaft hole B (9) of connection piece (10) one end is worn in axle B (24) is connected with the one end of connection piece (10) is articulated.
6. The method of reaming blind holes in a machined workpiece of claim 1, wherein: the other end face of the reaming bit cylinder (8) is provided with an inserting column (3), and the inner ring (2) of the bearing (1) is fixed on the outer edge face of the inserting column (3).
7. The method of reaming blind holes in a machined workpiece of claim 6, wherein: the end face of the other end of the reaming bit cylinder (8) is provided with a conical surface (4), and the inserting column (3) is arranged in the middle of the conical surface (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910158264.2A CN109773230B (en) | 2019-03-04 | 2019-03-04 | Hole expanding method for blind hole of machined workpiece |
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| CN201910158264.2A CN109773230B (en) | 2019-03-04 | 2019-03-04 | Hole expanding method for blind hole of machined workpiece |
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| CN109773230B true CN109773230B (en) | 2021-05-04 |
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| CN111375806B (en) * | 2019-10-06 | 2021-08-03 | 安徽凯森特矿山机械制造有限公司 | Forced reaming drill bit |
| CN112610572A (en) * | 2020-12-15 | 2021-04-06 | 梁绍丽 | Plate connecting method |
| CN112606109A (en) * | 2020-12-15 | 2021-04-06 | 梁绍丽 | Method for drilling T-shaped hole on furniture board |
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| JPH01109015A (en) * | 1987-09-17 | 1989-04-26 | Gte Valenite Corp | Bottle boring milling tool |
| DE10312570A1 (en) * | 2002-03-27 | 2003-10-23 | Leonhard Weiss Gmbh & Co Kg | Rotary cutter or cutting grooves has chisels attached by arms and radially offset in relation to axle, external thread, nut and radial slits |
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| CN109773230A (en) | 2019-05-21 |
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Effective date of registration: 20211111 Address after: 215134 Building 1, No. 80, Xinyan Avenue, Weibei village, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: Suzhou spenette Chemical Fiber Technology Co., Ltd Address before: 311800 Canghu 809, Lianhe village, Taozhu street, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: Zhuji Xunchao Industrial Design Co., Ltd |