CN217291397U - Numerical control machining double-end boring machine positioning workbench - Google Patents
Numerical control machining double-end boring machine positioning workbench Download PDFInfo
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- CN217291397U CN217291397U CN202123426702.0U CN202123426702U CN217291397U CN 217291397 U CN217291397 U CN 217291397U CN 202123426702 U CN202123426702 U CN 202123426702U CN 217291397 U CN217291397 U CN 217291397U
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- 238000003754 machining Methods 0.000 title claims abstract description 40
- 239000000428 dust Substances 0.000 claims description 53
- 238000000034 method Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 206010063659 Aversion Diseases 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of boring machine, and relates to a positioning workbench of a numerical control machining double-head boring machine, which comprises a workbench main body, a machining disc, a limiting mechanism, a telescopic driving mechanism and a second rotary driving mechanism, wherein the second rotary driving mechanism is arranged on the workbench main body and is connected with the machining disc positioned above the workbench main body; the telescopic driving mechanism and the limiting mechanism are sequentially arranged right above the processing disc from top to bottom; the telescopic driving mechanism is connected with the workbench main body and is connected with the telescopic driving mechanism through a telescopic rod; the telescopic driving mechanism drives the limiting mechanism to move up and down along the axial direction of the telescopic rod and to contact or separate from the processing disc. The utility model provides a workbench, location process simple operation, ability automatic reversing, labour saving and time saving, security are good, and work efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of the boring machine, concretely relates to numerical control processing double-end boring machine positioning workbench.
Background
The boring machine is a machine tool for boring the existing prefabricated holes of a workpiece by using a boring cutter, is mainly used for machining high-precision holes or finishing finish machining of a plurality of holes by positioning at one time, and can also finish machining of other machining surfaces related to finish machining of the holes.
The double-end boring machine needs to position a workpiece on the workbench when the workpiece is machined, and although the machining efficiency can be improved, the existing workbench for positioning has the following problems: (1) the workbench has a simple structure, workpieces are usually fixed with through holes arranged on the workbench by using fixing bolts, and the operation is complex; (2) after the two end faces of the workpiece are machined, the workbench needs to be manually reversed, time and labor are wasted, and the safety is poor.
SUMMERY OF THE UTILITY MODEL
To the technical problem that current double-end boring machine workstation exists, the utility model provides a numerical control processing double-end boring machine positioning table, the positioning process simple operation, ability automatic switching-over, labour saving and time saving, security are good.
In order to realize the purpose, the utility model discloses a technical scheme is:
a positioning workbench of a numerical control machining double-head boring machine comprises a workbench main body, a machining disc, a limiting mechanism, a telescopic driving mechanism and a second rotary driving mechanism, wherein the second rotary driving mechanism is arranged on the workbench main body and is connected with the machining disc positioned above the workbench main body; the telescopic driving mechanism and the limiting mechanism are sequentially arranged right above the processing disc from top to bottom; the telescopic driving mechanism is connected with the workbench main body and is connected with the telescopic driving mechanism through a telescopic rod; the telescopic driving mechanism drives the limiting mechanism to move up and down along the axial direction of the telescopic rod and to contact or separate from the processing disc.
Further, a limiting plate connected with the limiting mechanism is arranged right below the limiting mechanism; the limiting plate is located right above the machining disc.
Further, the limiting mechanism is connected with the limiting plate sequentially through the buffer spring and the pressed piece; the buffer spring and the pressed piece are both positioned in the limiting mechanism.
Furthermore, the positioning workbench of the numerical control machining double-head boring machine also comprises a base and a horizontal moving mechanism arranged on the base; the horizontal moving mechanism is arranged below the workbench main body and is movably connected with the workbench main body, and the workbench main body is driven by the horizontal moving mechanism to freely move on the base.
Furthermore, the horizontal moving mechanism comprises a first rotary driving mechanism, a screw rod and a driving block which are respectively arranged on the base; the driving block is sleeved outside the screw rod; the screw rod is connected with the workbench main body through a driving block; the first rotary driving mechanism is connected with the lead screw.
Furthermore, the horizontal moving mechanism also comprises a guide rod which is arranged on the base and is coaxial with the screw rod; the two guide rods are axially and symmetrically arranged around the screw rod; the two guide rods are sleeved with guide sleeves; and the two guide sleeves are connected with the driving block.
Furthermore, the positioning workbench of the numerical control machining double-head boring machine also comprises a frame body arranged on the workbench main body; the axial direction of the frame body is vertical to the workbench main body; the telescopic driving mechanism is arranged on the frame body.
The dust collection mechanism comprises a dust collection box, an air pump, an air duct and an air inlet; the dust collection box is arranged in the workbench main body; the dust collection box is provided with an exhaust port; the air inlet is arranged on the frame body and faces the upper part of the processing disc; one end of the air duct is communicated with the air inlet; the other end of the air duct is communicated with the exhaust port through an air pump and a dust collection box in sequence.
Furthermore, the dust collection mechanism also comprises a filter screen arranged in the dust collection box; the net surface of the filter screen is vertical to the axial direction of the air duct.
The dust collection mechanism also comprises a sliding connecting piece which is formed by matching a sliding chute and a sliding rail, the sliding chute is arranged on the inner wall of the dust collection box, and the sliding rail is arranged at the end part of the side of the filter screen; the two sliding connecting pieces are arranged corresponding to the inner walls of the dust collection box respectively.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a numerical control processing double-end boring machine positioning workbench is through installing the workstation main part, the processing dish, the support body, flexible actuating mechanism, stop gear, the limiting plate, buffer spring and pressed piece, the workstation main part sets up between two sets of boring cutters of double-end boring machine, the processing work piece is arranged in and is gone up the back on the processing dish, flexible actuating mechanism's output passes through the telescopic link and drives stop gear and move down, make the top contact of limiting plate and work piece and compress tightly it fixedly, avoid taking place the phenomenon of skew aversion in carrying out the course of working, and convenient for operation, pressed piece compression buffer spring in stop gear when compressing tightly the work piece simultaneously, cushion through its resilience, be difficult to cause the indentation to the work piece top surface.
(1) This numerical control processing double-end boring machine positioning workbench is through installing base, lead screw, first rotary driving mechanism, drive block and second rotary driving mechanism, and first rotary driving mechanism drives the lead screw and rotates for the drive block drives the workstation main part and removes, does benefit to the automation and adjusts the machined position of work piece, and second rotary driving mechanism can drive the processing dish through the roller bearing simultaneously and rotate, makes can automatic switching-over after the both sides processing to the work piece, does benefit to and improves machining efficiency.
(2) This numerical control processing double-end boring machine positioning workbench is through installing the air inlet, the air duct, the air pump, the dust collection box, filter screen and gas vent, the air inlet setting is close to one side of processing dish at the support body, do benefit to the dust piece that produces in the course of working and adsorb, dusty gas is filtered by the filter screen, later by the gas vent discharge, be difficult to cause the pollution to the processing environment, the both ends of filter screen all are provided with the slide rail, do benefit to the spout sliding connection that the dust collection box inside set up, the tear open of the filter screen of being convenient for is traded.
Drawings
Fig. 1 is a schematic front view of the present invention;
fig. 2 is a schematic view of a sectional structure of the present invention;
fig. 3 is a schematic top view of the base of the present invention;
FIG. 4 is a schematic sectional view of the limiting mechanism of the present invention;
fig. 5 is a schematic view of the transverse section structure of the dust box of the present invention.
In the figure:
1. a table main body; 2. processing a disc; 3. a limiting mechanism; 4. a telescopic driving mechanism; 5. a frame body; 6. a limiting plate; 7. a base; 8. a first rotary drive mechanism; 9. a dust collection box; 10. an air pump; 11. an air duct; 12. an air inlet; 13. a second rotary drive mechanism; 14. an annular groove; 15. a screw rod; 16. a drive block; 17. a guide rod; 18. a guide sleeve; 19. a buffer spring; 20. a pressure receiving member; 21. filtering with a screen; 22. a slide rail; 23. and (7) an exhaust port.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 and fig. 2, the positioning workbench of the numerical control machining double-ended boring machine provided in this embodiment includes a workbench main body 1, a machining disc 2, a limiting mechanism 3, a telescopic driving mechanism 4, and a second rotation driving mechanism 13. The second rotary driving mechanism 13 is arranged on the workbench main body 1 and is connected with the processing disc 2 positioned above the workbench main body 1, and the second rotary driving mechanism 13 drives the processing disc 2 to rotate; the telescopic driving mechanism 4 and the limiting mechanism 3 are sequentially arranged right above the processing disc 2 from top to bottom; the telescopic driving mechanism 4 is connected with the workbench main body 1 and is connected with the telescopic driving mechanism 4 through a telescopic rod; the telescopic driving mechanism 4 drives the limiting mechanism 3 to move up and down along the axial direction of the telescopic rod and to contact or separate from the processing disc 2.
Referring to fig. 4, a limiting plate 6 connected with the limiting mechanism 3 is arranged right below the limiting mechanism 3; the limiting plate 6 is positioned right above the processing disc 2. The limiting mechanism 3 is connected with the limiting plate 6 through the buffer spring 19 and the pressure receiving piece 20 in sequence; the buffer spring 19 and the pressure receiving member 20 are both located in the limiting mechanism 3.
Specifically, the workbench main body 1 is a cuboid, a frame body 5 is arranged on the edge of the upper surface of the workbench main body 1, the frame body 5 is axially vertical to the workbench main body 1, and the bottom end of the frame body 5 is connected with the workbench main body 1 and is fixed to form an L shape; the top end of the frame body 5 is connected with a fixed rod parallel to the table surface of the workbench main body 1, and the telescopic driving mechanism 4 is arranged on the fixed rod. The output end of the telescopic driving mechanism 4 is connected with a limiting mechanism 3 right below the telescopic driving mechanism 4 through a telescopic rod, and the limiting mechanism 3 is located right above the processing disc 2.
In this embodiment, the limiting mechanism 3 is uniformly provided with a pressed part 20 through a buffer spring 19, and the bottom end of the pressed part 20 is provided with a limiting plate 6; the output end of the telescopic driving mechanism 4 drives the limiting mechanism 3 to move downwards through a telescopic rod, so that the limiting plate 6 is in contact with the top of the workpiece and is pressed and fixed, and the phenomenon of deviation and displacement in the machining process is avoided; meanwhile, when the workpiece is pressed, the compression piece 20 compresses the buffer spring 19 in the limiting mechanism 3, and the buffering is carried out through the resilience of the buffer spring, so that the top surface of the workpiece is not easy to be indented.
Specifically, a processing disc 2 is arranged above the upper surface of the workbench main body 1, a second rotary driving mechanism 13 is embedded into the top end surface of the workbench main body 1, and the output end of the second rotary driving mechanism 13 is connected with the processing disc 2 through a rolling shaft. The second rotary driving mechanism 13 can drive the processing disc 2 to rotate through the rolling shaft, so that the two sides of the workpiece can be automatically reversed after being processed, and the processing efficiency is improved.
Further, an annular groove 14 is formed in the upper surface of the workbench main body 1, the annular groove 14 is located in the peripheral direction of the second rotary driving mechanism 13, slide rods which are connected with the annular groove 14 in a sliding mode are arranged on two sides of the bottom of the machining disc 2, when the machining disc 2 is placed above the upper surface of the workbench main body 1, the slide rods are clamped into the annular groove 14, and stability of the machining disc 2 during rotation is improved.
Example 2
Referring to fig. 1, 2 and 3, on the basis of embodiment 1, the positioning table of the numerical control machining double-ended boring machine provided by this embodiment further includes a base 7 and a horizontal moving mechanism disposed on the base 7; the horizontal moving mechanism is arranged below the workbench main body 1 and is movably connected with the workbench main body 1, and the horizontal moving mechanism drives the workbench main body 1 to freely move on the base 7.
Referring to fig. 2 and 3, the horizontal movement mechanism includes a first rotary drive mechanism 8, a lead screw 15, and a drive block 16, which are respectively disposed on the base 7; the driving block 16 is sleeved outside the screw rod 15; the screw rod 15 is connected with the workbench main body 1 through a driving block 16; the first rotary drive 8 is connected to a spindle 15.
The horizontal moving mechanism also comprises a guide rod 17 which is arranged on the base 7 and is coaxial with the screw rod 15; the two guide rods 17 are axially and symmetrically arranged relative to the screw rod 15; the two guide rods 17 are sleeved with guide sleeves 18; both guide sleeves 18 are connected to the drive block 16.
Referring to fig. 3, specifically, the base 7 is a rectangular structure, a screw rod 15 is arranged at the central position inside the base 7, the axial direction of the screw rod 15 is arranged between the opposite inner walls of the base 7 and movably connected with the inner walls, a driving block 16 is sleeved on the screw rod 15, and a threaded hole matched with the screw rod 15 is formed in the driving block 16; the top of the driving block 16 is connected with the workbench main body 1 and fixed through a fixing piece, a first rotary driving mechanism 8 is arranged outside the base 7, the output end of the first rotary driving mechanism 8 is connected with the lead screw 15 through a rolling shaft, the first rotary driving mechanism 8 drives the lead screw 15 to rotate, the driving block 16 drives the workbench main body 1 to move, and the automatic adjustment of the machining position of a workpiece is facilitated.
Further, in the base 7, two guide rods 17 are arranged along the axial direction of the screw rod 15, the axial directions of the two guide rods 17 are the same as the axial direction of the screw rod 15, the guide sleeves 18 are sleeved on the two guide rods 17 in a sliding mode, and when the driving block 16 is sleeved outside the screw rod 15, the opposite side walls of the driving block 16 are correspondingly connected with the guide sleeves 18 sleeved on the two guide rods 17 respectively, so that the driving block 16 is limited and guided.
Example 3
On the basis of embodiment 2, the positioning workbench of the numerical control machining double-ended boring machine further comprises a dust collection mechanism.
Referring to fig. 2 and 5, the dust suction mechanism includes a dust box 9, an air pump 10, an air duct 11, and an air inlet 12; the dust collection box 9 is arranged in the workbench main body 1; the dust collection box 9 is provided with an exhaust port 23; the air inlet 12 is arranged on the frame body 5, and the air inlet 12 faces to the upper part of the processing disc 2; one end of the air duct 11 is connected with the air inlet 12; the other end of the air duct 11 is communicated with an air outlet 23 through an air pump 10 and a dust collection box 9 in sequence.
The dust collection mechanism also comprises a sliding connecting piece which is formed by matching a sliding chute and a sliding rail, the sliding chute is arranged on the inner wall of the dust collection box 9, and the sliding rail is arranged at the end part at the side of the filter screen 21. The number of the sliding connecting pieces is two, and the two sliding connecting pieces are respectively arranged corresponding to the inner wall of the dust collection box 9.
Specifically, a dust collection box 9 is arranged on the left side inside the workbench main body 1, a filter screen 21 is arranged inside the dust collection box 9, an air inlet 12 is arranged at the central position on the frame body 5, the air inlet 12 is in an outward-expanding bucket shape, a bucket-shaped opening faces to the upper part of the processing disc 2, the air inlet 12 is communicated with the dust collection box 9 through an air duct 11, and an air pump 10 is arranged on the air duct 11; one end of the bottom of the workbench main body 1 is provided with an exhaust port 23, and the air inlet 12 is communicated with the exhaust port 23 through an air duct 11. The filter screen 21 is vertically inserted into the dust collection box 9 from the box opening of the dust collection box 9, the screen surface is vertical to the gas flow direction, the edge filters dust-containing particles of the gas, and then the clean gas is discharged from the exhaust port 23.
During implementation, the air pump 10 is beneficial to adsorbing dust fragments generated in the processing process, dust-containing gas is filtered by the filter screen 21 and then discharged from the air outlet 23, and the processing environment is not easily polluted.
Furthermore, both ends of the filter screen 21 are provided with slide rails 22, both ends inside the dust collection box 9 are provided with slide grooves matched with the slide rails 22, and the filter screen 21 is arranged between the two slide groove hands and is connected with the slide grooves inside the dust collection box 9 in a sliding manner through the slide rails 22, so that the filter screen 21 can be conveniently detached and replaced. The two sliding grooves are respectively arranged on the opposite side walls of the dust collection box 9 and extend to the top of the dust collection box 9 along the bottom of the dust collection box 9; slide rail 22 is two, corresponds the setting with filter screen 21's tip respectively, arranges two spouts in between as filter screen 21, can express delivery through slide rail 22 and realize filter screen 21's dismouting.
In the above embodiments, the specific model specifications of the telescopic driving mechanism 4, the first rotary driving mechanism 8, the second rotary driving mechanism 13 and the air pump 10 need to be determined by model selection calculation according to the specification parameters of the device, and the model selection calculation method is the prior art, and therefore, detailed description is omitted.
The utility model provides a numerical control processing double-end boring machine positioning workbench, its theory of operation is:
(1) when the double-head boring machine is used, the workbench main body 1 is arranged between two groups of boring cutters of the double-head boring machine, and a workpiece is placed on the processing disc 2;
(2) the output end of the telescopic driving mechanism 4 drives the limiting mechanism 3 to move downwards through the telescopic rod, so that the limiting plate 6 is in contact with the top of the workpiece and is pressed and fixed, the phenomenon of deviation and displacement in the machining process is avoided, and the operation is convenient; meanwhile, when the workpiece is pressed, the compression piece 20 compresses the buffer spring 19 in the limiting mechanism 3, and the buffering is carried out through the resilience of the buffer spring, so that the top surface of the workpiece is not easy to be indented; then, the first rotary driving mechanism 8 drives the screw rod 15 to rotate along the axial direction of the screw rod 15, so that the driving block 16 drives the workbench main body 1 to move, and the automatic adjustment of the processing position of the workpiece is facilitated; meanwhile, the second rotary driving mechanism 13 can drive the processing disc 2 to rotate through the rolling shaft, so that the two sides of the workpiece can be automatically reversed after being processed, and the processing efficiency is improved;
(3) adsorb the dust piece that produces in with the course of working through air pump 10, in dusty gas gets into dust collection box 9 through air duct 11, filter the dust of detaching among the dusty gas through filter screen 21, later the gas that does not contain the dust is discharged by gas vent 23, is difficult to cause the pollution to the processing environment, and filter screen 21's both ends all are provided with slide rail 22, do benefit to and collect the inside spout sliding connection that sets up of dust collection box 9, the filter screen 21 of being convenient for tear open and trade.
Claims (10)
1. The positioning workbench of the numerical control machining double-head boring machine is characterized by comprising a workbench main body (1), a machining disc (2), a limiting mechanism (3), a telescopic driving mechanism (4) and a second rotary driving mechanism (13), wherein the second rotary driving mechanism (13) is arranged on the workbench main body (1) and is connected with the machining disc (2) positioned above the workbench main body (1); the telescopic driving mechanism (4) and the limiting mechanism (3) are sequentially arranged right above the processing disc (2) from top to bottom; the telescopic driving mechanism (4) is connected with the workbench main body (1) and is connected with the telescopic driving mechanism (4) through a telescopic rod; the telescopic driving mechanism (4) drives the limiting mechanism (3) to move up and down along the axial direction of the telescopic rod and to be in contact with or separated from the processing disc (2).
2. The numerical control machining double-ended boring machine positioning workbench according to claim 1, wherein a limiting plate (6) connected with the limiting mechanism (3) is arranged right below the limiting mechanism (3); the limiting plate (6) is located right above the processing disc (2).
3. The numerical control machining double-ended boring machine positioning workbench according to claim 2, wherein the limiting mechanism (3) is connected with the limiting plate (6) sequentially through a buffer spring (19) and a pressed piece (20); the buffer spring (19) and the pressed piece (20) are both positioned in the limiting mechanism (3).
4. The numerically controlled machining double-ended boring machine positioning workbench according to claim 1, 2 or 3, characterized by further comprising a base (7) and a horizontal moving mechanism arranged on the base (7); the horizontal moving mechanism is arranged below the workbench main body (1) and is movably connected with the workbench main body (1), and the horizontal moving mechanism drives the workbench main body (1) to freely move on the base (7).
5. The numerical control machining double-ended boring machine positioning workbench according to claim 4, characterized in that the horizontal moving mechanism comprises a first rotary driving mechanism (8), a screw rod (15) and a driving block (16) which are respectively arranged on the base (7); the driving block (16) is sleeved outside the screw rod (15); the screw rod (15) is connected with the workbench main body (1) through a driving block (16); the first rotary driving mechanism (8) is connected with the screw rod (15).
6. The numerical control machining double-ended boring machine positioning workbench according to claim 5, wherein the horizontal moving mechanism further comprises a guide rod (17) which is arranged on the base (7) and is coaxial with the screw rod (15); the two guide rods (17) are axially and symmetrically arranged relative to the screw rod (15); the two guide rods (17) are sleeved with guide sleeves (18); the two guide sleeves (18) are connected with the driving block (16).
7. The numerical control machining double-ended boring machine positioning workbench according to claim 6, further comprising a frame body (5) arranged on the workbench main body (1); the axial direction of the frame body (5) is vertical to the workbench main body (1); the telescopic driving mechanism (4) is arranged on the frame body (5).
8. The numerically controlled machining double-ended boring machine positioning workbench according to claim 7, further comprising a dust suction mechanism; the dust collection mechanism comprises a dust collection box (9), an air pump (10), an air duct (11) and an air inlet (12); the dust collection box (9) is arranged in the workbench main body (1); an exhaust port (23) is arranged on the dust collection box (9); the air inlet (12) is arranged on the frame body (5) and the air inlet (12) faces to the upper part of the processing disc (2); one end of the air duct (11) is communicated with the air inlet (12); the other end of the air duct (11) is communicated with the air outlet (23) through an air pump (10) and a dust collection box (9) in sequence.
9. The numerical control machining double-ended boring machine positioning workbench according to claim 8, wherein the dust suction mechanism further comprises a filter screen (21) arranged in the dust collection box (9); the net surface of the filter screen (21) is vertical to the axial direction of the air duct (11).
10. The numerical control machining double-end boring machine positioning workbench according to claim 9, wherein the dust collection mechanism further comprises a sliding connecting piece formed by matching a sliding groove and a sliding rail, the sliding groove is arranged on the inner wall of the dust collection box (9), and the sliding rail is arranged at the side end of the filter screen (21); the number of the sliding connecting pieces is two, and the two sliding connecting pieces are respectively arranged corresponding to the opposite inner walls of the dust collection box (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123426702.0U CN217291397U (en) | 2021-12-31 | 2021-12-31 | Numerical control machining double-end boring machine positioning workbench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123426702.0U CN217291397U (en) | 2021-12-31 | 2021-12-31 | Numerical control machining double-end boring machine positioning workbench |
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| Publication Number | Publication Date |
|---|---|
| CN217291397U true CN217291397U (en) | 2022-08-26 |
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ID=82922509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123426702.0U Active CN217291397U (en) | 2021-12-31 | 2021-12-31 | Numerical control machining double-end boring machine positioning workbench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217291397U (en) |
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2021
- 2021-12-31 CN CN202123426702.0U patent/CN217291397U/en active Active
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Effective date of registration: 20231118 Address after: 710000, No. 3, Shenjiazhai Industrial Park, Afangyi Road, Fengdong New City, Xi'an City, Shaanxi Province Patentee after: Shaanxi Futong Electric Appliance Equipment Co.,Ltd. Address before: Group 2, Gaozhuang village, Gaozhuang Town, Jinghe new town, Xixian New District, Xianyang City, Shaanxi Province Patentee before: Shaanxi Xixian New District FUHENG Electrical Equipment Co.,Ltd. |
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