CN204997505U - Sealed face repairing tool - Google Patents
Sealed face repairing tool Download PDFInfo
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- CN204997505U CN204997505U CN201520734320.XU CN201520734320U CN204997505U CN 204997505 U CN204997505 U CN 204997505U CN 201520734320 U CN201520734320 U CN 201520734320U CN 204997505 U CN204997505 U CN 204997505U
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- hollow structure
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Abstract
The utility model relates to a sealed face repairing tool, include: positioning element and grinding part, positioning element has hollow structure, waits to repair the work piece and fixes in hollow structure, grinds the part and wears to locate in the hollow structure for the sealed face (3) of work piece is waited to repair in the grinding, and stretches out among the one end follow positioning element, and forms roll connection between the positioning element. Positioning element among this kind of sealed face repairing tool has played spacingly and the guide effect to the rotational energy that grinds the part, can make the grinding part treat the damage position of repairing on the sealed face of work piece with higher precision and grind, and size and shape after the assurance is ground simultaneously can reach better sealed effect with the sealed face cooperation of matched with the time, avoid taking place leakage phenomenon as far as possible, and roll connection can make the grinding part more nimble when rotatory to improve remediation efficiency, and improve sealed face repairing tool's life.
Description
Technical field
The utility model relates to mechanical frock technical field, particularly relates to a kind of sealing surface repair outfit.
Background technology
The mode that when pressure piping of mechanical device connects, in many employings, male cone (strobilus masculinus) engages, sphere engages, such as, pipeline in aero-engine external structure.This connected mode requires that sealing surface or potted line have good sealing property, interior male cone (strobilus masculinus) or sphere without scar, but due to these joint small volumes, and outside being exposed in welding circular flow, therefore they be easy to scratch, the defect such as impression.And sealing surface, still as last connecting portion, thus needs to carry out reparation by milling tool and overcomes these defects when pressure piping assembles.
Usually sealing surface repair outfit is as shown in Figure 1 adopted in prior art, or be referred to as grinding rod, the sealing surface 3a being mainly used in butt joint 1a grinds, this joint 1a is provided with external screw thread 2a for matching with other joint part, is positioned at the link 7a of joint 1a away from sealing surface 3a for welding conduit.This grinding rod to be connected with grinding handle 5a by grinding head 4a and to form, the end face of grinding head 4a offers the inner conical surface 6a suitable with the sealing surface 3a shape of joint 1a, when after discovery joint 1a existing defects, the inner conical surface 6a of grinding rod is positioned on the sealing surface 3a of joint 1a, then adopts manual or electronic mode to control grinding rod and grinding reparation is carried out to sealing surface 3a.But adopt the joint conical surface after this grinding rod reparation easily to deform, be difficult to form good sealing surfaces with other mating surface, need repeatedly to adjust reparation, so just substantially increase the time of rehabilitation cost and cost.
Utility model content
The purpose of this utility model proposes a kind of sealing surface repair outfit, can improve the repairing quality to Work piece sealing face.
For achieving the above object, the utility model provides a kind of sealing surface repair outfit, comprise: positioning element and grinding component, described positioning element has hollow structure, workpiece to be repaired is fixed in described hollow structure, and described grinding component is arranged in described hollow structure, for grinding the sealing surface of described workpiece to be repaired, and one end is stretched out from described positioning element, be connected with being formed between described positioning element to roll.
Further, described workpiece to be repaired is joint, and described positioning element is the guide pin bushing being set in described joint outer wall, and described guide pin bushing and described joint are threaded connection secondary fixing.
Further, described grinding component is rotating knife, described rotating knife comprises cutter head and handle of a knife, described cutter head is positioned at the hollow structure of described guide pin bushing, can carry out rotating and/or rectilinear motion under the drive of described handle of a knife, the free end of described cutter head offers the abradant surface suitable with described sealing surface.
Further, formed to roll by bearing between described guide pin bushing with described handle of a knife and be connected.
Further, described guide pin bushing comprises the second cylinder of the first cylinder and cross section increasing, described guide pin bushing offers the first hole, the second hole and the 3rd hole successively from the free end of described first cylinder, described first hole as described hollow structure for holding described cutter head, described handle of a knife stretches out in described second hole, and the inner ring of described bearing and outer ring coordinate with described handle of a knife and described 3rd hole respectively.
Further, be matched in clearance between the inner ring of described bearing and described handle of a knife.
Further, also comprise driver part, described driver part is connected with described grinding component, moves in described hollow structure for driving described grinding component.
Further, described driver part is the fixing turning arm in the one end of stretching out from described positioning element with grinding component or motor.
Further, the shape of described abradant surface is the conical surface or sphere.
Further, described abradant surface and inner sealing surface or external seal face suitable.
Based on technique scheme, the sealing surface repair outfit of the utility model embodiment, by workpiece to be repaired is fixed in the hollow structure of positioning element, grinding component is arranged in the hollow structure of positioning element, and non-ground end is connected with being formed between positioning element to roll, then the rotation of positioning element to grinding component serves spacing and guide effect, grinding component can be made to treat with higher precision the damage location repaired on workpiece sealing surface grind, ensure the size and dimension precision after grinding simultaneously, make the sealing surface after reparation closer to the sealing surface being added means acquisition by machine, good sealing effectiveness can be reached when assembling rear with the sealing surface matched, avoid Seepage occurs as far as possible, and rolling connection can make grinding component more flexible when rotated, thus improve remediation efficiency, and improve the service life of sealing surface repair outfit.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of sealing surface repair outfit in prior art;
Fig. 2 is that sealing surface repair outfit of the present utility model is for repairing the structural representation of conical seal (contact) face;
Fig. 3 is that sealing surface repair outfit of the present utility model is for repairing the structural representation of spherical seal surface;
Fig. 4 is the structural representation of guide pin bushing in an embodiment of the utility model sealing surface repair outfit.
Description of reference numerals
1a-joint; 2a-external screw thread; 3a-sealing surface; 4a-grinding head; 5a-grinds handle; 6a-abradant surface; 7a-link;
1-joint; 2-threaded connection pair; 3-sealing surface; 4-rotating knife; 5-turning arm; 6-hole; 7-handle of a knife; 8-bearing; 9-cutter head; 10-abradant surface; 11-guide pin bushing; 12-link; 11A-first cylinder; 11B-second cylinder; 11C-first hole; 11D-second hole; 11E-the 3rd hole.
Detailed description of the invention
Below describe the utility model in detail.In the following paragraphs, the different aspect of embodiment is defined in more detail.The each side of restriction like this can combine with any other one aspect or many aspects, not may be combined with unless explicitly stated otherwise.Especially, be considered to preferred or favourable any feature and one or morely can be considered to preferred or favourable feature with other.
Terms such as " first ", " second " that occur in the utility model is only for convenience of description, to distinguish the different building blocks with same names, does not represent successively or primary-slave relation.
In description of the present utility model; it will be appreciated that; orientation or the position relationship of the instruction such as term "left", "right", " vertically " and " level " are based on orientation shown in the drawings or position relationship; it is only the utility model for convenience of description; instead of the device of instruction or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as the restriction to the utility model protection domain.
Be difficult to reach higher size and dimension precision in order to overcome grinding rod of the prior art when repairing sealing surface, the utility model provides a kind of sealing surface repair outfit of improvement, this instrument is as shown in Figures 2 and 3 for repairing the structural representation of sealing surface, comprise: positioning element and grinding component, positioning element has hollow structure, workpiece to be repaired is fixed in hollow structure, position for treating repairing workpiece, grinding component is arranged in hollow structure, for grinding the sealing surface 3 of workpiece to be repaired, and one end is stretched out from positioning element, be connected with being formed between positioning element to roll.
Wherein, workpiece to be repaired herein as grinding object can be the workpiece that joint 1 or other needs carry out being sealed and matched, and the sealing surface 3 on workpiece can be the conical surface or sphere, accordingly, another workpiece matched with this workpiece also can be the conical surface or sphere, two workpiece forming surface contact or linear contact lay after assembling completes, seal in order to the flow media passed through inside workpiece.In addition, sealing surface 3 both can be inner sealing surface also can be external seal face.
In order to realize higher grinding efficiency, also can arrange driver part on the repair outfit of sealing face, driver part is connected with grinding component, for driving grinding component to move in hollow structure, comprises rotary motion and axially-movable.
The sealing surface repair outfit of the utility model embodiment, by workpiece to be repaired is fixed in the hollow structure of positioning element, grinding component is arranged in the hollow structure of positioning element, and non-ground end is connected with being formed between positioning element to roll, then the rotation of positioning element to grinding component serves spacing and guide effect, grinding component can be made to treat with higher precision the damage location repaired on workpiece sealing surface grind, ensure the size and dimension precision after grinding simultaneously, make the sealing surface after reparation closer to the sealing surface being added means acquisition by machine, good sealing effectiveness can be reached after assembling with the sealing surface matched, avoid Seepage occurs as far as possible, and rolling connection can make grinding component more flexible when rotated, thus improve remediation efficiency, and improve the service life of sealing surface repair outfit.
In one comparatively specific embodiment, provide the example that a workpiece to be repaired is joint 1, the shape of joint 1 as shown in Figures 2 and 3, the link 12 being positioned at joint 1 leftward position is connected with catheter pressure, such as be fixed together by the mode of welding, the end being positioned at right positions is provided with sealing surface 3, sealing face 3 is the external seal face of taper in the embodiment that Fig. 2 is corresponding, it is spherical external seal face in the embodiment that Fig. 3 is corresponding, the cylinder being positioned at interlude is provided with external screw thread, is connected for being fixed with other joint matched.The joint 1 of this structure is comparatively common in machinery industry, such as: the field such as aircraft and automobile can be used in, especially in the engine of aircraft or automobile, obtain application widely, the sealing surface repair outfit thus designing a kind of Grinding Quality higher is very important.
For above-described this joint 1, provide a kind of preferred sealing surface grinding work here, positioning element is the guide pin bushing 11 being set in joint 1 outer wall, and guide pin bushing 11 and the interlude cylinder of joint 1 are threaded connection secondary 2 and fix, and achieve the location of butt joint 1.Preferably, guide pin bushing 11 adopts copper material to process, and because the hardness of copper is lower, when guide pin bushing 11 is tightened on joint 1, the external screw thread of butt joint 11 can be avoided to cause damage as far as possible.
Further, grinding component is rotating knife 4, rotating knife 4 comprises cutter head 9 and handle of a knife 7, cutter head 9 is positioned at the hollow structure of guide pin bushing 11, can carry out rotating and/or rectilinear motion under the drive of handle of a knife 7, the external diameter of cutter head 9 should keep suitable gap with the internal diameter of guide pin bushing 11 hollow structure, and to avoid bringing unnecessary resistance to the cutter head 9 of motion, the free end of cutter head 9 offers the abradant surface 10 suitable with sealing surface 3.And formed to roll be connected by bearing 8 between guide pin bushing 11 with handle of a knife 7, wherein, bearing 8 according to circumstances has more multiple optional form, such as deep groove ball bearing, cylinder roller bearing or needle bearing etc.
Be the situation of male cone (strobilus masculinus) for the sealing surface 3 shown in Fig. 2, abradant surface 10 can be designed to be opened in the identical V-arrangement inner conical surface of the subtended angle of cutter head 9 free end, and male cone (strobilus masculinus) will be contained completely, in order to improve the structural strength of tool bit part, be preferably flat shape by the bottom design of inner conical surface.For the situation that the sealing surface shown in Fig. 3 is outer convex spherical, abradant surface 10 can be designed to be opened in the identical interior concave spherical surface of the radius of curvature of cutter head 9 free end, and outer convex spherical will be contained completely.
In a kind of concrete structure, as shown in Figure 4, guide pin bushing 11 comprises the first cylinder 11A and the second cylinder 11B, guide pin bushing 11 offers the first hole 11C, the second hole 11D and the 3rd hole 11E successively from the free end of the first cylinder 11A, first hole 11C as hollow structure for holding cutter head 9, handle of a knife 7 stretches out in the second hole 11D, and the inner ring of bearing 8 and outer ring coordinate with handle of a knife 7 and the 3rd hole 11E respectively.Preferably, because the second cylinder 11B is used for rigid bearing 8, in order to improve the intensity of guide pin bushing 11, the second cylinder 11B can be designed to the form increased than the first cylinder 11A cross section.
Particularly, in order to locate accurately bearing 8, the mode of interference fit is adopted to assemble between its outer ring and the 3rd hole 11E, matched in clearance is adopted between inner ring and handle of a knife 7, gap can be determined according to coordinating the diameter of elasticity and the handle of a knife needed, in a concrete example, between inner ring and handle of a knife 7, keep the gap of monolateral 0.025mm.Matched in clearance is adopted to be very crucial for the characteristic of instrument herein, because it should limit the swing of handle of a knife 7 as far as possible, to control in rational scope by rotating the coaxiality error brought, make handle of a knife 7 can carry out axially-movable along the inner ring of bearing 8 again, to adjust the gap between abradant surface 10 and sealing surface 3.
When grinding, this repair outfit can make rotating knife 4 rotate by the form of assembler's hand rotation handle of a knife 7, thus abradant surface 10 and sealing surface 3 are relatively rotated, to realize the grinding to sealing surface 3, suitable abrasive pastes can also be added if desired to strengthen grinding effect.In order to improve manual efficiency, the mode increasing the arm of force can be adopted to impel handle of a knife 7 to rotate when designing, this structure is time saving and energy saving, easy to operate, such as, as shown in Figures 2 and 3, the free end on the right side of handle of a knife 7 offers porose 6, the axes normal in hole 6, in the axis of handle of a knife 7, is provided with turning arm 5 by tight fit or other fixed form in hole 6.When joint 1 to be repaired batch is larger, adopt the mode of repaired by hand obviously can not reach higher efficiency, and the uniformity that can not ensure between each joint 1, in order to overcome these shortcomings, in another embodiment, can also the coaxial fixed electrical machinery of free end on the right side of handle of a knife 7, move by carrying out driven rotary swivel to the control of motor, this mode, except improving remediation efficiency, can also ensure that the size and dimension between each joint 1 is consistent, more easily meet the requirement of sealing.
Further the using method of sealing surface repair outfit in above-described embodiment is described below, for Fig. 2 and Fig. 3, first guide pin bushing 11 is set on joint 1, and be threaded connection secondary 2 and tighten; Then turning arm 5 is rotated, axial power is left applied a little while rotating, make abradant surface 10 gradually near sealing surface 3, when abradant surface 10 contacts with sealing surface 3, only need constantly to rotate turning arm 5 along a direction, abradant surface 10 pairs of sealing surfaces 3 just can be made to grind, can also add abrasive pastes if desired, the concrete meaning of grinding is the metal material that there is damage on the surface of removing the conical surface to be repaired or sphere; After grinding continues for some time, can while rotation turning arm 5, apply axial power to the right a little, rotating knife 4 is outwards exited, then guide pin bushing 11 is backed out from joint 1, now can carry out observing or measuring, if the surface smoothness of sealing surface 3, shape or size reach requirement, then repair procedures terminates, if still do not met the demands, can continue repetition said process.
The sealing surface repair outfit of above-described embodiment at least possesses one of following effect:
(1) guide pin bushing after fixing can retrain the cutting of rotating knife to damage location metal material, the size and dimension precision after grinding can be ensured, make the conical surface after grinding or sphere more close to the conical surface or the sphere that adopt lathe process, thus good sealing effectiveness can be reached when coordinating with the sealing surface matched, avoid Seepage occurs as far as possible, also can reduce reparation risk simultaneously.
(2) bearing being set between guide pin bushing and handle of a knife, rotating knife can being made more flexible when rotating, to improve grinding efficiency; Compared to being coordinated the mode realizing rotating by contact surface, bearing flexibility ratio when rotating is high, can improve the service life of sealing surface repair outfit.
(3) this repair outfit structure is simple, and forms an entirety between each part, avoids the phenomenon of easily losing individual part when depositing, and uses more for convenience.
(4) this repair outfit both can grind independent joint, also can the joint being connected with conduit be ground, make before grinding without the need to as on lathe processing, product is all broken to single joint, thus adaptability and practicality stronger.
Above a kind of sealing surface repair outfit provided by the utility model is described in detail.Apply specific embodiment herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (10)
1. a sealing surface repair outfit, it is characterized in that, comprise: positioning element and grinding component, described positioning element has hollow structure, workpiece to be repaired is fixed in described hollow structure, and described grinding component is arranged in described hollow structure, for grinding the sealing surface (3) of described workpiece to be repaired, and one end is stretched out from described positioning element, be connected with being formed between described positioning element to roll.
2. sealing surface repair outfit according to claim 1, it is characterized in that, described workpiece to be repaired is joint (1), described positioning element is for being set in the guide pin bushing (11) of described joint (1) outer wall, and described guide pin bushing (11) and described joint (1) are threaded connection pair (2) and fix.
3. sealing surface repair outfit according to claim 2, it is characterized in that, described grinding component is rotating knife (4), described rotating knife (4) comprises cutter head (9) and handle of a knife (7), described cutter head (9) is positioned at the hollow structure of described guide pin bushing (11), can carry out rotating and/or rectilinear motion under the drive of described handle of a knife (7), the free end of described cutter head (9) offers the abradant surface (10) suitable with described sealing surface (3).
4. sealing surface repair outfit according to claim 3, is characterized in that, is formed to roll to be connected between described guide pin bushing (11) with described handle of a knife (7) by bearing (8).
5. sealing surface repair outfit according to claim 4, it is characterized in that, described guide pin bushing (11) comprises second cylinder (11B) of the first cylinder (11A) and cross section increasing, described guide pin bushing (11) offers the first hole (11C) successively from the free end of described first cylinder (11A), second hole (11D) and the 3rd hole (11E), described first hole (11C) as described hollow structure for holding described cutter head (9), described handle of a knife (7) stretches out in described second hole (11D), the inner ring of described bearing (8) and outer ring coordinate with described handle of a knife (7) and described 3rd hole (11E) respectively.
6. sealing surface repair outfit according to claim 5, is characterized in that, is matched in clearance between the inner ring of described bearing (8) and described handle of a knife (7).
7. sealing surface repair outfit according to claim 1, is characterized in that, also comprise driver part, and described driver part is connected with described grinding component, moves in described hollow structure for driving described grinding component.
8. sealing surface repair outfit according to claim 7, is characterized in that, described driver part is the fixing turning arm (5) in the one end of stretching out from described positioning element with grinding component or motor.
9. sealing surface repair outfit according to claim 3, is characterized in that, the shape of described abradant surface (10) is the conical surface or sphere.
10. sealing surface repair outfit according to claim 3, is characterized in that, described abradant surface (10) and inner sealing surface or external seal face suitable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520734320.XU CN204997505U (en) | 2015-09-22 | 2015-09-22 | Sealed face repairing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520734320.XU CN204997505U (en) | 2015-09-22 | 2015-09-22 | Sealed face repairing tool |
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| CN204997505U true CN204997505U (en) | 2016-01-27 |
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| CN201520734320.XU Active CN204997505U (en) | 2015-09-22 | 2015-09-22 | Sealed face repairing tool |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737123A (en) * | 2016-11-25 | 2017-05-31 | 中航动力股份有限公司 | A kind of aero-engine exterior line conical surface seal grinds prosthetic device and method |
| CN106826476A (en) * | 2017-03-20 | 2017-06-13 | 西华大学 | The set pressure type grinding attachment of inverted cone surface sealing ring |
| CN108673304A (en) * | 2018-05-30 | 2018-10-19 | 中国航发动力股份有限公司 | A kind of grinding device and its restorative procedure for repairing cone seal plane tie |
| CN109366091A (en) * | 2018-12-10 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | The manual repair outfit of high pressure screw thread and its repair method |
| CN109623627A (en) * | 2018-12-20 | 2019-04-16 | 上海中船三井造船柴油机有限公司 | Pneumatic grinding tool and grinding method for high-pressure oil pipe Spherical Seals face |
| CN110421470A (en) * | 2019-07-18 | 2019-11-08 | 昆山肯达欧曼燃油喷射系统有限公司 | A kind of device for repairing of super-pressure fuel oil injection oil pipe |
| CN110480490A (en) * | 2019-08-19 | 2019-11-22 | 上海华力微电子有限公司 | A kind of interception cone cleaning device and application method |
| CN111376170A (en) * | 2019-11-19 | 2020-07-07 | 中国航发贵州黎阳航空动力有限公司 | Machining device for deep hole high-precision sealing surface |
| CN111823133A (en) * | 2020-07-26 | 2020-10-27 | 中国航发贵州红林航空动力控制科技有限公司 | Flexible grinder structure with conical surface automatically aligned |
| CN113134754A (en) * | 2021-05-21 | 2021-07-20 | 南京王行航空附件维修工程有限公司 | Method for repairing abraded oil distributing surface of oil cylinder of PTU rotor assembly |
| CN114800249A (en) * | 2022-04-24 | 2022-07-29 | 中国人民解放军第五七一九工厂 | Repairing method for comprehensive geometric tolerance of K bracket of main fuel regulator |
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2015
- 2015-09-22 CN CN201520734320.XU patent/CN204997505U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737123A (en) * | 2016-11-25 | 2017-05-31 | 中航动力股份有限公司 | A kind of aero-engine exterior line conical surface seal grinds prosthetic device and method |
| CN106826476A (en) * | 2017-03-20 | 2017-06-13 | 西华大学 | The set pressure type grinding attachment of inverted cone surface sealing ring |
| CN108673304A (en) * | 2018-05-30 | 2018-10-19 | 中国航发动力股份有限公司 | A kind of grinding device and its restorative procedure for repairing cone seal plane tie |
| CN109366091A (en) * | 2018-12-10 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | The manual repair outfit of high pressure screw thread and its repair method |
| CN109623627A (en) * | 2018-12-20 | 2019-04-16 | 上海中船三井造船柴油机有限公司 | Pneumatic grinding tool and grinding method for high-pressure oil pipe Spherical Seals face |
| CN110421470A (en) * | 2019-07-18 | 2019-11-08 | 昆山肯达欧曼燃油喷射系统有限公司 | A kind of device for repairing of super-pressure fuel oil injection oil pipe |
| CN110480490A (en) * | 2019-08-19 | 2019-11-22 | 上海华力微电子有限公司 | A kind of interception cone cleaning device and application method |
| CN110480490B (en) * | 2019-08-19 | 2021-08-13 | 上海华力微电子有限公司 | Intercepting cone cleaning device and using method |
| CN111376170A (en) * | 2019-11-19 | 2020-07-07 | 中国航发贵州黎阳航空动力有限公司 | Machining device for deep hole high-precision sealing surface |
| CN111823133A (en) * | 2020-07-26 | 2020-10-27 | 中国航发贵州红林航空动力控制科技有限公司 | Flexible grinder structure with conical surface automatically aligned |
| CN113134754A (en) * | 2021-05-21 | 2021-07-20 | 南京王行航空附件维修工程有限公司 | Method for repairing abraded oil distributing surface of oil cylinder of PTU rotor assembly |
| CN114800249A (en) * | 2022-04-24 | 2022-07-29 | 中国人民解放军第五七一九工厂 | Repairing method for comprehensive geometric tolerance of K bracket of main fuel regulator |
| CN114800249B (en) * | 2022-04-24 | 2023-05-26 | 中国人民解放军第五七一九工厂 | Repair method for comprehensive form and position tolerance of K bracket of main fuel regulator |
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Address after: 200241 Minhang District Lianhua Road, Shanghai, No. 3998 Patentee after: China Hangfa commercial aviation engine limited liability company Address before: 200241 Minhang District Lianhua Road, Shanghai, No. 3998 Patentee before: AVIC Commercial Aircraft Engine Co.,Ltd. |