CN112676692A - Ultrasonic welding machine - Google Patents
Ultrasonic welding machine Download PDFInfo
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- CN112676692A CN112676692A CN202011552379.9A CN202011552379A CN112676692A CN 112676692 A CN112676692 A CN 112676692A CN 202011552379 A CN202011552379 A CN 202011552379A CN 112676692 A CN112676692 A CN 112676692A
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Abstract
The invention belongs to the technical field of ultrasonic welding, and discloses an ultrasonic welding machine which comprises a three-link group, a bearing component and a driving component, wherein the driving component is used for driving the bearing component to be close to or far away from a welding head so as to weld a to-be-welded part with a deep hole, the driving component comprises a connecting rod structure and a driving part, the connecting rod structure and the driving part can drive the bearing component and the to-be-welded part on the bearing component to move rapidly, the time of single welding is greatly shortened, the working efficiency is improved, when the driving part drives the connecting rod structure to move and enables the connecting rod structure to be in a dead point position, the acting force of the to-be-welded part on the bearing component and the connecting rod structure completely acts on the bearing component and the driving part, the driving part cannot be influenced, the bearing component, the connecting rod structure and the driving part can shake along with the vibration of the welding head when the welding head vibrates, so that the, greatly improving the power consumption ratio, reducing the energy consumption and improving the efficiency.
Description
Technical Field
The invention relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding machine.
Background
The existing ultrasonic welding machine adopts a welding mode that a part to be welded is fixed on a bottom die firstly, then an ultrasonic three-way set of the welding machine is used as an execution component to drive a welding head to perform reciprocating motion so as to enable the welding head to weld the part to be welded through ultrasonic vibration and pressure, however, when the part to be welded with a deep hole is required to be welded, the welding machine needs to spend a lot of time to stretch the welding head into the deep hole so as to reach the position to be welded, and then the period of single welding of the welding machine is prolonged, and the production efficiency is greatly reduced.
Therefore, it is necessary to design an ultrasonic welding machine to weld a to-be-welded part with a deep hole, and to improve the welding efficiency.
Disclosure of Invention
The invention aims to provide an ultrasonic welding machine, which is used for welding a to-be-welded part with a deep hole and improving the welding efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an ultrasonic welding machine, which comprises a triple group, a bearing component and a driving component, wherein the bearing component is opposite to a welding head of the triple group and is arranged at intervals, the bearing component is used for bearing or fixing a workpiece to be welded, the driving component is used for driving the bearing component to approach or depart from the welding head along a Y direction, and the driving component comprises:
the connecting rod structure comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged with one end of the second connecting rod, one end of the first connecting rod, which is not hinged with the second connecting rod, is rotatably arranged, and one end of the second connecting rod, which is not hinged with the first connecting rod, is hinged with the bearing component; and
a driving part configured to drive the first link to rotate in an X-Y plane about an end thereof not articulated with the second link.
The ultrasonic welding machine comprises a triple group, a bearing assembly and a driving assembly, wherein the bearing assembly is opposite to a welding head of the triple group and is arranged at intervals, the bearing assembly is used for bearing or fixing a workpiece to be welded, the driving assembly is used for driving the bearing assembly to be close to or far away from the welding head along the Y direction so as to weld the workpiece to be welded with a deep hole, the driving assembly comprises a connecting rod structure and a driving part, the connecting rod structure and the driving part can drive the bearing assembly and the workpiece to be welded on the bearing assembly to move rapidly, the time of single welding is greatly shortened, the working efficiency is improved, the connecting rod structure comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged with one end of the second connecting rod, one end of the first connecting rod, which is not hinged with the second connecting rod, is rotatably arranged, and one end of the second connecting rod, which is; the driving part can drive the first connecting rod to rotate around one end, which is not hinged with the second connecting rod, in an X-Y plane, when the driving part drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to move so that the bearing component is close to or far away from the welding head, when the first connecting rod and the second connecting rod are in the same straight line and are not overlapped, the connecting rod structure consisting of the first connecting rod and the second connecting rod is in a dead point position, at the moment, the bearing component is equivalently fixed, the acting force of the welding head on a workpiece to be welded in the Y direction completely acts on the bearing component and the connecting rod structure, the influence on the driving part is avoided, the bearing component is prevented from vibrating when the welding head vibrates, the connecting rod structure and the driving part can vibrate along with the vibration of the welding head, thereby the welding energy is consumed, the ultrasonic welding machine utilizes the principle that the connecting rod structure has the dead point position, and, the energy consumption is reduced, and the efficiency is improved.
Preferably, the ultrasonic welder further includes:
a limiting assembly configured to limit a rotation angle of the first link.
The limiting assembly can limit the rotation angle of the first connecting rod to prevent the rotation angle of the first connecting rod from being too large, so that the first connecting rod and the second connecting rod are located on the same straight line, and the connecting rod structure is located at a dead point position.
Preferably, the restriction member comprises:
a body having a threaded hole formed therein; and
and the abutting part penetrates through the threaded hole and can move along the X direction, and the first connecting rod can abut against the abutting part.
The abutting part can move along the X direction so as to adjust the position of the abutting part, so that the connecting rod structure can find the dead point position.
Preferably, the holding portion includes:
the threaded rod is connected with the threaded hole in a threaded manner; and
and the abutting block is arranged at one end of the threaded rod close to the first connecting rod.
The abutting part comprises a threaded rod abutting block, the threaded rod is used for adjusting the position of the abutting block, and the abutting part is simple in structure and easy to manufacture.
Preferably, the driving part is an air cylinder, and a power output end of the air cylinder is in transmission connection with the first connecting rod.
The cylinder pole of cylinder can stretch out fast or retract to the quick rotation of the first connecting rod of drive, the output power of cylinder is great, and the use technique is comparatively ripe, and the cost is lower.
Preferably, the ultrasonic welder further includes:
and the bottom of the air cylinder is hinged to the supporting table.
The brace table is used for supporting the air cylinder, when the air cylinder rod of the air cylinder extends out, the first connecting rod rotates, the connecting part of the air cylinder rod and the first connecting rod can move relatively along the X direction and the Y direction, correspondingly, the air cylinder can rotate to a certain degree, and the air cylinder is hinged to the brace table so as to rotate conveniently.
Preferably, the cylinder is further provided with a support portion, and a bottom portion of the support portion is capable of abutting against the support base.
This supporting part can carry out certain support to the cylinder to prevent that the cylinder from striking the brace table, when supporting part and brace table looks butt, this supporting part can also play certain limiting action to the rotation of first connecting rod.
Preferably, the ultrasonic welder further includes:
the support frame, be provided with the guide rail on the support frame, the guide rail extends along the Y direction, the bearing subassembly slide set up in on the guide rail.
The guide rail on the support frame can make the bearing subassembly slide along the Y direction, and this guide rail has the guide effect to the bearing subassembly.
Preferably, the support frame is provided with a weight reduction structure.
This subtract heavy structure can alleviate the weight of support frame and welding machine under the prerequisite that does not reduce the intensity and the rigidity of support frame to the transport and the use of welding machine are convenient for.
Preferably, a bottom film is arranged on the bearing component and used for fixing the piece to be welded.
The base film is used for fixing a to-be-welded part, and is beneficial to welding processing of the to-be-welded part after the to-be-welded part is fixed, so that the welding efficiency and the welding precision are improved.
The invention has the beneficial effects that:
the ultrasonic welding machine comprises a triple group, a bearing component and a driving component, wherein the bearing component is opposite to a welding head of the triple group and is arranged at intervals, the bearing component is used for bearing or fixing a piece to be welded, the driving component is used for driving the bearing component to be close to or far away from the welding head along the Y direction so as to weld the piece to be welded with a deep hole, the driving component comprises a connecting rod structure and a driving part, the connecting rod structure and the driving part can drive the bearing component and the piece to be welded on the bearing component to move rapidly, the time of single welding is greatly shortened, the working efficiency is improved, the connecting rod structure comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged with one end of the second connecting rod, one end of the first connecting rod, which is not hinged with the second connecting rod, is arranged in a rotating mode, and one end of the second connecting rod, which is; the driving part can drive the first connecting rod to rotate around one end, which is not hinged with the second connecting rod, in an X-Y plane, when the driving part drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to move so that the bearing component is close to or far away from the welding head, when the first connecting rod and the second connecting rod are in the same straight line and are not overlapped, the connecting rod structure consisting of the first connecting rod and the second connecting rod is in a dead point position, at the moment, the bearing component is equivalently fixed, the acting force of the welding head on a workpiece to be welded in the Y direction completely acts on the bearing component and the connecting rod structure, the influence on the driving part is avoided, the bearing component is prevented from vibrating when the welding head vibrates, the connecting rod structure and the driving part can vibrate along with the vibration of the welding head, thereby the welding energy is consumed, the ultrasonic welding machine utilizes the principle that the connecting rod structure has the dead point position, and, the energy consumption is reduced, and the efficiency is improved.
Drawings
FIG. 1 is a schematic view of an ultrasonic welder proposed by the present invention;
fig. 2 is a schematic view of a concealed triplex set and a rack of the ultrasonic welder according to the present invention.
In the figure:
100. a workpiece to be welded;
1. three-in-one group; 2. a holding assembly; 3. a drive assembly; 4. a restraining component; 5. a support table; 6. a support frame; 7. a frame; 8. a base plate; 9. a handle;
11. a welding head; 21. a base film; 31. a connecting rod structure; 32. a drive section; 41. a main body; 42. a holding portion; 61. a weight reduction structure; 62. a guide rail; 81. a supporting seat;
421. a threaded rod; 422. a holding block; 311. a first link; 312. a second link; 321. a cylinder; 322. a support portion; 323. a connecting member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The ultrasonic welding machine is a device for converting electric energy into mechanical energy, and utilizes the high-frequency vibration of three-combined welding heads to make the welding heads produce friction with the workpiece to be welded so as to produce the heat quantity required for welding, and utilizes the pressure of the welding heads on the workpiece to be welded to implement welding operation. The invention provides an ultrasonic welding machine which can weld a to-be-welded part with a deep hole or a deep groove, wherein a welding head of the ultrasonic welding machine can extend into the deep hole or the deep groove to carry out welding operation, as shown in fig. 1 and 2, the ultrasonic welding machine comprises a three-connection group 1, a supporting component 2 and a driving component 3, the three-connection group 1 is arranged on a frame 7, the supporting component 2 is opposite to and spaced from the welding head 11 of the three-connection group 1, the supporting component 2 is used for supporting or fixing the to-be-welded part 100, the driving component 3 is used for driving the supporting component 2 to approach or leave the welding head 11 along the Y direction so as to weld the to-be-welded part 100 with the deep hole, the driving component 3 comprises a connecting rod structure 31 and a driving part 32, the connecting rod structure 31 and the driving part 32 can drive the supporting component 2 and the to-be-welded part 100 on the supporting component 2 to move rapidly, the time of single welding is greatly shortened, the connecting rod structure 31 comprises a first connecting rod 311 and a second connecting rod 312, wherein one end of the first connecting rod 311 is hinged with one end of the second connecting rod 312, one end of the first connecting rod 311, which is not hinged with the second connecting rod 312, is rotatably arranged, and one end of the second connecting rod 312, which is not hinged with the first connecting rod 311, is hinged with the supporting component 2; the driving portion 32 can drive the first connecting rod 311 to rotate around the end of the first connecting rod 311 which is not hinged to the second connecting rod 312 in the X-Y plane, when the driving portion 32 drives the first connecting rod 311 to rotate, the first connecting rod 311 drives the second connecting rod 312 to move, so that the supporting component 2 is close to or away from the welding head 11, when the first connecting rod 311 and the second connecting rod 312 are in the same straight line and are not overlapped, the connecting rod structure 31 formed by the first connecting rod 311 and the second connecting rod 312 is in a dead point position, at this time, the supporting component 2 is fixed, the acting force of the welding head 11 to the workpiece 100 along the Y direction completely acts on the supporting component 2 and the connecting rod structure 31, and does not affect the driving portion 32, and the phenomenon that the supporting component 2, the connecting rod structure 31 and the driving portion 32 shake along with the vibration of the welding head 11 when the welding head 11 vibrates is avoided, so as to consume welding energy, the ultrasonic welding machine in this embodiment utilizes the principle that the connecting rod structure, greatly improving the power consumption ratio, reducing the energy consumption and improving the efficiency.
As shown in fig. 1, the ultrasonic welding machine further includes a support frame 6, a guide rail 62 is disposed on the support frame 6, the guide rail 62 extends along the Y direction, the support assembly 2 is slidably disposed on the guide rail 62, the guide rail 62 on the support frame 6 enables the support assembly 2 to slide along the Y direction, and the guide rail 62 has a guiding function on the support assembly 2.
Specifically, the support frame 6 is provided with a weight reducing structure 61, the weight reducing structure 61 can reduce the weight of the support frame 6 and the welder without reducing the strength and rigidity of the support frame 6, so as to facilitate the handling and use of the welder, and preferably, the weight reducing structure 61 is a plurality of weight reducing through holes.
As shown in fig. 1, be provided with basement membrane 21 on the bearing subassembly 2, basement membrane 21 can dismantle with bearing subassembly 2 and link, and this basement membrane 21 is used for the fixed weldment 100 of waiting, will wait that weldment 100 is fixed good back, helps treating weldment 100 and weld processing to promote welding efficiency and precision. In the present embodiment, the carrier film 21 is made to be a shape-copying according to the shape of the object 100 to be welded, and the carrier film 21 can be replaced according to the shape of the object 100 to be welded during the use of the welding machine.
In order to prevent the first link 311 from rotating too much, the ultrasonic welding machine is further provided with a limiting assembly 4, and the limiting assembly 4 can limit the rotating angle of the first link 311 to prevent the rotating angle of the first link 311 from being too large, so that the first link 311 and the second link 312 are in the same straight line to enable the link structure 31 to be in the dead point position.
Specifically, the limiting component 4 includes a main body 41 and a supporting portion 42, the main body 41 is disposed on one side of the first connecting rod 311, a threaded hole is disposed on the main body 41, the supporting portion 42 is disposed in the threaded hole in a penetrating manner and can move along the X direction to adjust the position of the supporting portion 42, and when the first connecting rod 311 is supported by the supporting portion 42, the adjustment of the position of the supporting portion 42 is helpful for finding the dead point position of the connecting rod structure 31.
Further, the abutting portion 42 includes a threaded rod 421 and an abutting block 422, the threaded rod 421 is threaded to the threaded hole to adjust the position of the abutting block 422, the abutting block 422 is disposed at an end of the threaded rod 421 close to the first link 311, in addition, a knob is further disposed at an end of the threaded rod 421 far away from the first link 311 to rotate the threaded rod 421, so as to adjust the position of the abutting block 422, and the abutting portion 42 is simple in structure and easy to manufacture.
In an embodiment, the driving portion 32 adopts the air cylinder 321 as a power source, the air cylinder 321 is connected to an air source through an air pipe and a control valve, a cylinder rod of the air cylinder 321 can extend out or retract rapidly to drive the first link 311 to rotate rapidly, the output force of the air cylinder 321 is large, the use technology is mature, the cost is low, specifically, a power output end of the air cylinder 321 is in transmission connection with the first link 311, and in this embodiment, one end of the air cylinder 321 hinged to the first link 311 and one end of the air cylinder 321 hinged to the second link 312 are in transmission connection with one connecting piece 323.
Preferably, the connecting member 323 has a U-shaped structure and is connected to the cylinder 321, the first connecting rod 311 and the second connecting rod 312 are both hinged to the connecting member 323, and the first connecting rod 311 and the second connecting rod 312 are located in the U-shaped structure.
As shown in fig. 1 and 2, the ultrasonic welding machine further includes a support table 5, the support table 5 is disposed on a side of the first connecting rod 311 away from the main body 41 of the limiting assembly 4, the bottom of the cylinder 321 is hinged to the support table 5, the supporting platform 5 is used for supporting the cylinder 321, when the cylinder rod of the cylinder 321 extends out, the first connecting rod 311 rotates, the joint of the cylinder rod and the first connecting rod 311 moves relatively along the X direction and the Y direction, correspondingly, the cylinder 321 rotates to a certain degree, the cylinder 321 is hinged to the supporting platform 5 so that the cylinder 321 rotates, in addition, the cylinder 321 is further provided with a supporting part 322, the bottom of the supporting part 322 can be abutted to the supporting platform 5, the support portion 322 can support the cylinder 321 to prevent the cylinder 321 from striking the support base 5, and when the support portion 322 contacts the support base 5, the support 322 can also limit the rotation of the first link 311.
In other embodiments, the driving portion 32 may further adopt a linear motor as a power source, a power output end of the linear motor is in transmission connection with the first connecting rod 311 to drive the first connecting rod 311 to rotate, because the air source has a large volume and is inconvenient to carry, the linear motor is adopted as the power source to reduce the volume of the welding machine, so that the structure is more compact, and the welding machine is convenient to carry and use; of course, the driving portion 32 may also adopt a steering engine as a power source, and a power output end of the steering engine is connected with one end of the first connecting rod 311, which is not hinged to the second connecting rod 312, so as to directly drive the first connecting rod 311 to rotate, and the structure of the welding machine may be more compact by adopting the steering engine.
In this embodiment, the ultrasonic welding machine further includes a bottom plate 8, the frame 7, the supporting frame 6, the main body 41 of the limiting assembly 4, the supporting table 5 and the control box of the welding machine are disposed on the bottom plate 8, in addition, a supporting seat 81 is disposed on the bottom plate 8, and one end of the first connecting rod 311, which is not hinged to the second connecting rod 312, is hinged to the supporting seat 81, so that the first connecting rod 311 can rotate around the end, which is not hinged to the second connecting rod 312, in the X-Y plane, in this embodiment, two handles 9 are further disposed on the bottom plate 8, so as to facilitate carrying of the welding machine.
When the ultrasonic welding machine is used for welding, firstly, the air cylinder 321 is reset (the air cylinder rod retracts), the to-be-welded part 100 is fixed on the bottom film 21, the air cylinder rod extends out, the bearing component 2 is close to the welding head 11, meanwhile, the welding head 11 extends into a deep hole or a deep groove of the to-be-welded part 100, the welding head 11 abuts against the to-be-welded position, and then the triple unit 1 drives the welding head 11 to work so as to finish welding operation.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The ultrasonic welding machine is characterized by comprising a triple group (1), a bearing component (2) and a driving component (3), wherein the bearing component (2) and a welding head (11) of the triple group (1) are arranged oppositely and at intervals, the bearing component (2) is used for bearing or fixing a workpiece to be welded (100), the driving component (3) is used for driving the bearing component (2) to be close to or far away from the welding head (11) along the Y direction, and the driving component (3) comprises:
the connecting rod structure (31) comprises a first connecting rod (311) and a second connecting rod (312), one end of the first connecting rod (311) is hinged with one end of the second connecting rod (312), one end, which is not hinged with the second connecting rod (312), of the first connecting rod (311) is rotatably arranged, and one end, which is not hinged with the first connecting rod (311), of the second connecting rod (312) is hinged with the supporting component (2); and
a drive section (32) configured to drive the first link (311) to rotate in an X-Y plane about an end thereof which is not hinged to the second link (312).
2. The ultrasonic welder according to claim 1, characterized by further comprising:
a limiting assembly (4) configured to limit a rotation angle of the first link (311).
3. The sonotrode of claim 2, characterized in that said constraining assembly (4) comprises:
a main body (41) provided with a threaded hole; and
and a butting part (42) which is arranged in the threaded hole in a penetrating way and can move along the X direction, and the first connecting rod (311) can be butted against the butting part (42).
4. The ultrasonic welder according to claim 3, characterized in that said abutment (42) comprises:
a threaded rod (421) threadedly connected to the threaded hole; and
and the abutting block (422) is arranged at one end of the threaded rod (421) close to the first connecting rod (311).
5. The ultrasonic welding machine according to any of the claims 1 to 4, characterized in that the driving part (32) is a cylinder (321), and the power output end of the cylinder (321) is in transmission connection with the first connecting rod (311).
6. The ultrasonic welder according to claim 5, characterized by further comprising:
and the bottom of the air cylinder (321) is hinged to the support table (5).
7. The sonotrode of claim 6, characterized in that said cylinder (321) is further provided with a support (322), the bottom of said support (322) being able to abut against said support table (5).
8. The ultrasonic welder according to any of the claims 1 to 4, characterized by further comprising:
support frame (6), be provided with guide rail (62) on support frame (6), guide rail (62) extend along the Y direction, bearing subassembly (2) slide set up in on guide rail (62).
9. Sonotrode according to claim 8, characterized in that the support frame (6) is provided with weight-reducing structures (61).
10. The sonotrode of any one of claims 1 to 4, characterized in that said supporting assembly (2) is provided with a base film (21), said base film (21) being used to fix said piece to be welded (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011552379.9A CN112676692A (en) | 2020-12-24 | 2020-12-24 | Ultrasonic welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011552379.9A CN112676692A (en) | 2020-12-24 | 2020-12-24 | Ultrasonic welding machine |
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| CN112676692A true CN112676692A (en) | 2021-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194315A (en) * | 2022-08-05 | 2022-10-18 | 上海骄成超声波技术股份有限公司 | Ultrasonic welding machine and welding method thereof |
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2020
- 2020-12-24 CN CN202011552379.9A patent/CN112676692A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194315A (en) * | 2022-08-05 | 2022-10-18 | 上海骄成超声波技术股份有限公司 | Ultrasonic welding machine and welding method thereof |
| CN115194315B (en) * | 2022-08-05 | 2024-06-04 | 上海骄成超声波技术股份有限公司 | Ultrasonic welding machine and welding method thereof |
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Address after: 200240 floor 3, building 2, No. 1488, Cangyuan Road, Minhang District, Shanghai Applicant after: Shanghai Jiaocheng Ultrasonic Technology Co.,Ltd. Address before: 200241 1st floor, building 3, 48 Lane 4916, Hongmei South Road, Minhang District, Shanghai Applicant before: SBT ENGINEERING SYSTEMS Co.,Ltd. |
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