CN203031425U - Polishing device for shafts - Google Patents
Polishing device for shafts Download PDFInfo
- Publication number
- CN203031425U CN203031425U CN 201220701061 CN201220701061U CN203031425U CN 203031425 U CN203031425 U CN 203031425U CN 201220701061 CN201220701061 CN 201220701061 CN 201220701061 U CN201220701061 U CN 201220701061U CN 203031425 U CN203031425 U CN 203031425U
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- polishing
- polissoir
- thimble
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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The utility model provides a polishing device for shafts. The polishing device comprises a machine frame, a machine cover, a controller, a multi-station scale division rotary disc and groups of brush mechanisms. Groups of workpiece clamping mechanisms used for clamping shaft workpieces are arranged on the multi-station scale division rotary disc. When rotating along with the multi-station scale division rotary disc, the workpiece clamping mechanisms move past a feed station and a plurality of polishing stations. Each brush mechanism is located at a polishing station. The inside of the machine cover is divided into an upper device installation space and a lower polishing space through a separating plate. The brush mechanisms are installed on the separating plate, and the main part of the brush mechanisms is located in the device installation space. The multi-station scale division rotary disc and the workpiece clamping mechanisms are located in the polishing space. The metal powder produced when the shaft workpieces are polished is limited in the polishing space, cannot spread to the outside to affect the surroundings and the physical health of workers, and also cannot stay on the surfaces of the brush mechanisms to affect the cleanness and the performance of the brush mechanisms.
Description
Technical field
The utility model relates to a kind of for the axle class polissoir that the shaft-like workpiece surface is polished.
Background technology
Shaft-like workpiece, for example bent axle be parts the most key in the engine, so its required precision is very high.Any defective on the bent axle all can have a strong impact on the performance of engine, and is therefore higher to the surface requirements of bent axle, generally needs through grinding and polishing process.The appearance profile of bent axle and roughness are its key indexs.The general appearance profile guarantees that by the emery wheel corase grind its surface roughness is then guaranteed by the precise finiss band.
Present shaft-like workpiece polishing machine lacks isolating and protecting, and dust and waste residue that shaft-like workpiece produces in the process of polishing can splash to the periphery, are trapped in the surface of process equipment, makes process equipment be not easy to cleaning, and influences the performance of process equipment.
The utility model content
The purpose of this utility model is the defective at prior art, and a kind of axle class polissoir that the shaft-like workpiece surface is polished be convenient to is provided.
For solving the problems of the technologies described above, the utility model has adopted following technical scheme: design a kind of class polissoir, comprise frame, hood, controller, multistation calibration rotating disk and many group brush devices, described multistation calibration rotating disk is provided with the workpiece grip mechanism that many groups are used for the clamping shaft-like workpiece, described workpiece grip mechanism passes through feed station and a plurality of polishing station successively when rotating with described multistation calibration rotating disk, every group of described brush device is positioned at a described polishing station place, described hood inside is divided into the installation space on top and the polishing space of bottom by dividing plate, described brush device is installed on the described dividing plate and the main body of this brush device is positioned at described installation space, and described multistation calibration rotating disk and described workpiece grip mechanism are positioned at described polishing space.
By such scheme as seen, because hood inside is divided into the installation space on top and the polishing space of bottom by dividing plate, the main body of brush device is positioned at installation space, therefore, the metal dust that shaft-like workpiece produces in polishing process is limited in the polishing space, neither can disperse healthy to external action surrounding environment and staff can not be trapped in the brush device surface yet and influence its cleaning and performance.
Further, every group of described polishing station place is equipped be used to the top that holds out against described shaft-like workpiece to prevent the ejector pin mechanism of described shaft-like workpiece beat, and described ejector pin mechanism is installed on the described dividing plate and the main body of this ejector pin mechanism is positioned at described installation space.
Preferably, described multistation calibration rotating disk is six station calibration rotating disks, and described workpiece grip mechanism has six groups, and described brush device and ejector pin mechanism respectively have four groups, and described polishing station has four.Described six station calibration rotating disks can realize that different polishing stations process simultaneously, and every group of workpiece grip mechanism clamps shaft-like workpiece automatically at the polishing station, and drives the shaft-like workpiece rotation at polishing station place, realizes the uniform polish of shaft-like workpiece cylindrical.
Preferably, described ejector pin mechanism comprises thimble element, thimble cylinder, thimble rod, and described thimble cylinder drives described thimble rod vertical lift, and fixedly there is thimble seat the lower end of described thimble rod, and described thimble element can be connected to described thimble seat with rotating freely.The artificial size that can regulate pressure by the air inlet pressure-reducing valve of regulating the thimble cylinder.Because the thimble element can regulate lifting, shaft-like workpiece that therefore can compatible different length.
Preferably, described brush device is installed on the described dividing plate by substrate, this brush device comprises brush element, hairbrush drive motors and cylinder, on the described substrate slide rail is installed, described hairbrush drive motors is fixed on the slide plate by the motor frame, this slide plate is slidably disposed on the described slide rail by slide block, and this slide plate is provided with spacing buffer.
Preferably, the cylinder rod of described cylinder is connected in a guide rod by a floating junction, this guide rod passes on the connecting plate that is fixed in described slide plate, this connecting plate is slidably disposed on the described guide rod by linear bearing fixed thereon, be provided with the back stop nut that is fixed on the described guide rod between described linear bearing and the described floating junction, the front end of described guide rod is provided with the front limit nut, is provided with the spring that is enclosed within on the described guide rod between described linear bearing and the described front limit nut.
Preferably, described dividing plate is provided with air entry, is used for detaching the powder that floats on described polishing space.
Preferably, the below in described polishing space is provided with disposal box, is used for collecting the powder that is deposited in the described polishing space.
Description of drawings
Fig. 1 is the stereogram of a kind of class polissoir of the present utility model.
Fig. 2 is the stereogram of axle class polissoir shown in Figure 1 after removing hood.
Fig. 3 is the stereogram that is applicable to the crankshaft workpiece of axle class polissoir shown in Figure 1.
Fig. 4 is the front view of axle class polissoir shown in Figure 1.
Fig. 5 is the A-A cutaway view of axle class polissoir shown in Figure 4.
Fig. 6 is the left view of axle class polissoir shown in Figure 4.
Fig. 7 is the vertical view of axle class polissoir shown in Figure 4.
Fig. 8 is the stereogram of the Work conveying apparatus in the axle class polissoir shown in Figure 2.
Fig. 9 is the plan view of Work conveying apparatus shown in Figure 8.
Figure 10 is the vertical view of Work conveying apparatus shown in Figure 8.
Figure 11 is the plan view of the workpiece grip mechanism in the Work conveying apparatus shown in Figure 8.
Figure 12 is the B-B cutaway view of workpiece grip mechanism shown in Figure 11.
Figure 13 is the stereogram of the brush device in the axle class polissoir shown in Figure 2.
Figure 14 is the plan view of brush device shown in Figure 13.
Figure 15 is the C-C cutaway view of workpiece grip mechanism shown in Figure 14.
Figure 16 is the vertical view of workpiece grip mechanism shown in Figure 14.
Figure 17 is the D-D cutaway view of workpiece grip mechanism shown in Figure 16.
Figure 18 is the stereogram of the ejector pin mechanism in the axle class polissoir shown in Figure 2.
Figure 19 is the plan view of ejector pin mechanism shown in Figure 180.
Figure 20 is the E-E cutaway view of ejector pin mechanism shown in Figure 19.
The specific embodiment
A kind of class polissoir 10 as shown in Figure 1, can be used for to shaft-like workpiece for example crankshaft workpiece 20 shown in Figure 3 polish, crankshaft workpiece 20 by minor axis 21, go up eccentric circular shaft 22, eccentric circular shaft 23 and major axis 24 constitute down, axle class polissoir 10 can be to above-mentioned minor axis 21, go up eccentric circular shaft 22, the periphery of eccentric circular shaft 23 and major axis 24 carries out polishing successively down.
Consult Fig. 1 to Fig. 7, this polissoir 10 comprises frame 1, material loading pallet 2, controller 3, hood 4, electronic box 5, six station calibration rotating disks 6, six groups of workpiece grip mechanisms 7, four groups of brush devices 8 and four groups of ejector pin mechanisms 9, and the operation of polissoir 10 is carried out centralized Control by controller 3.Six station calibration rotating disks 6, workpiece grip mechanism 7, brush device 8 and ejector pin mechanism 9 are positioned at hood 4 inside, in order to polish in the space of relative closure, prevent that dust and waste residue from splashing everywhere, more clean and safe.
Described hood 4 inside are divided into the installation space 41 on top and the polishing space 42 of bottom by dividing plate 11, and dividing plate 11 is installed on the base plate 31 by support column 12, and base plate 31 is fixed on the end face of frame 1.Four groups of brush devices 8 and four groups of ejector pin mechanisms 9 are installed on the dividing plate 11, and the main body of brush device 8 and ejector pin mechanism 9 all is positioned at the installation space 41 of dividing plate 11 tops, and the brush element 81 of brush device 8 and the thimble element 91 of ejector pin mechanism 9 are positioned at the polishing space 42 of dividing plate 11 belows.Six groups of workpiece grip mechanisms 7 are arranged on the six station calibration rotating disks 6, and crankshaft workpiece 20 is clamped on every group of workpiece grip mechanism 7, and six station calibration rotating disks 6, workpiece grip mechanism 7 and crankshaft workpiece 20 all are positioned at the polishing space 42 of dividing plate 11 belows.Workpiece grip mechanism 7 both can revolve round the sun around the axis of six station calibration rotating disks 6 again around self axis rotation on six station calibration rotating disks 6.Successively through four polishing stations, every group of brush device 8 and ejector pin mechanism 9 are positioned at a polishing station place, respectively one in the middle of four peripheries of crankshaft workpiece 20 are handled with 6 rotations of six station calibration rotating disks the time for every group of workpiece grip mechanism 7.Ejector pin mechanism 9 holds out against the top of crankshaft workpiece 20 to prevent that crankshaft workpiece 20 is at time rotational generation beat at polishing station place.
" the degree of tightness clip claw mechanism automatically " that the Chinese utility model patent CN201020659588.9 that the structure of the Work conveying apparatus 30 that Fig. 8 is extremely shown in Figure 10 and operation principle thereof and the applicant have announced discloses is similar, only makes simple explanation here.This Work conveying apparatus 30 is installed on the frame 1 by base plate 31, it comprises workpiece grip mechanism 7, six station calibration rotating disk 6 and driving mechanisms, six groups of workpiece grip mechanisms 7 are evenly distributed on the six station calibration rotating disks 6, workpiece grip mechanism 7 has matrix 77, be positioned at the upper end and can make the jaw 71 that degree of tightness is moved, driving jaw 71 operates and extends to the drive link 72 of lower end and promote drive link 72 downwards so that jaw 71 is made the elastic mechanism 73 of clamping action, the upper end of drive link 72 drives jaw 71 foldings by crank 75, and this driving mechanism comprises that one has the lifting slider 32 and the rolling member 74 of being located at these drive link 72 lower ends on leading slope.Be provided with linear bearing 78 between this drive link 72 and the matrix 77; Holder 76 is sheathed on the matrix 77, is provided with bearing 79 between holder 76 and the matrix 77.Sprocket wheel 710 is sheathed on the matrix 77 regularly and is positioned at holder 76 lower ends, is used for driving matrix 77 and does rotation with respect to holder 76; Elastic mechanism 73 is located on the matrix 77 and is positioned at sprocket wheel 710 lower ends, and it promotes drive link 72 downwards so that jaw 71 does to clamp action.
Consult Figure 11 and Figure 12, workpiece grip mechanism 7 passes six station calibration rotating disks 6 and provided thereon by holder 76, lifting slider 32 is positioned at the below of six station calibration rotating disks 6, six station protractors 33 drive six station calibration rotating disks 6 and rotate, workpiece grip mechanism 7 is along with six station calibration rotating disks 6 rotate, and jaw 71 was not to be in clamped condition when workpiece grip mechanism 7 was positioned at lifting slider 32 tops; When workpiece grip mechanism 7 turns to lifting slider 32 tops, drive link 72 moves from bottom to up along the leading slope of lifting slider 32, drive link 72 promotes jaw 71 and unclamps also elasticity of compression mechanism 73 gradually, when drive link 72 is positioned at the top of lifting slider 32, jaw 71 is in releasing orientation, at this moment, crankshaft workpiece 20 is placed in the jaw 71, workpiece grip mechanism 7 leaves lifting slider 32 then, elastic mechanism 73 returns to form and promotes drive link 72 and moves downward, jaw 71 clamps crankshaft workpiece 20, crankshaft workpiece 20 is processed along with six station calibration rotating disks 6 forward corresponding polishing station to, on corresponding station, under the drive of rotation driving-chain wheels 34, crankshaft workpiece 20 is processed to realize along with matrix 77 carries out rotation, crankshaft workpiece 20 returns the top of lifting slider 32 through the manufacturing procedure in a week, jaw 71 unclamps gradually, take out crankshaft workpiece 20, refill new crankshaft workpiece 20, new crankshaft workpiece 20 begins again that to enter corresponding station successively processed along with six station calibration rotating disks 6.
Consult Figure 13 to Figure 17, brush device 8 is installed on the dividing plate 11 by substrate 82, this brush device 8 specifically comprises brush element 81, hairbrush drive motors 83, cylinder 84 etc., slide rail 85 is installed on the substrate 82, hairbrush drive motors 83 is fixed on the slide plate 86 by motor frame 831, slide plate 86 is slidably disposed on the slide rail 85 by slide block 861, and this slide plate 86 is provided with spacing buffer 814.The cylinder rod 841 of cylinder 84 is connected in guide rod 89 by floating junction 88, this guide rod 89 passes on the connecting plate 87 that is fixed in slide plate 86, this connecting plate 87 is slidably disposed on the guide rod 89 by linear bearing fixed thereon 810, be provided with the back stop nut 811 that is fixed on the guide rod 89 between linear bearing 810 and the floating junction 88, the front end of guide rod 89 is provided with front limit nut 812, is provided with the spring 813 that is enclosed within on the guide rod between linear bearing 810 and the front limit nut 812.During brush device 8 work, hairbrush drive motors 83 drives brush element 81 rotations, cylinder 84 is with guide rod 89 post-tensionings, guide rod 89 is by front limit nut 812 and spring 813 pushing linear bearings 810, linear bearing 810 drives slide plate 86 by connecting plate 87 and slides along slide rail 85, make the cylindrical of the brush element 81 elastic compression crankshaft workpiece 20 that are installed on the slide plate 86, can regulate the thrust size according to the polishing effect that reality is required.When brush element 81 compresses crankshaft workpiece 20, the reaction force that brush element 81 produces when being subjected to crankshaft workpiece 20 rotations, the size of this reaction force is not enough to promote cylinder 84, but can make linear bearing 810 to front slide and compress spring 813, the elastic force of this spring 813 acts on the brush element 81 in polishing process all the time, thereby reaches the purpose that makes brush element 81 elasticity be close to the polishing of crankshaft workpiece 20 cylindricals.
Consult Figure 18 to Figure 20, ejector pin mechanism 9 is installed on the dividing plate 11 by pedestal 92, ejector pin mechanism 9 specifically comprises thimble element 91, thimble cylinder 93, thimble rod 94, thimble cylinder 93 can drive thimble rod 94 vertical lifts, fixedly there is thimble seat 95 lower end of thimble rod 94, and thimble element 91 can be connected to thimble seat 95 with rotating freely.When crankshaft workpiece 20 rotation when polishing station, thimble cylinder 93 descends thimble element 91 and holds out against the top of crankshaft workpiece 20, thimble element 91 is followed crankshaft workpiece 20 rotations, thereby prevents crankshaft workpiece 20 time rotational generation beats.Manually can be connected the air inlet air pressure that air inlet pressure-reducing valve on the thimble cylinder 93 is regulated thimble cylinder 93 by adjusting, change cylinder power output size, thereby reach the purpose of the pressure of regulating these ejector pin mechanism 9 outputs.
Polishing process can produce metal dust, is taken away by the air entry 111 on the dividing plate 11 by dust-collector for the powder that disperses aloft, ensures health; For the powder in the equipment of being deposited on, collect by the disposal box 13 that is arranged on base plate 31 belows, be convenient to concentrate and sweep cleaning.
The course of work of above-mentioned axle class polissoir 10 is as follows: manually crankshaft workpiece 20 is positioned over the feed station place, 6 rotations of six station calibration rotating disks, workpiece grip mechanism 7 clamps crankshaft workpiece 20 automatically, when going to the polishing station, the jaw 71 of workpiece grip mechanism 7 drives crankshaft workpiece 20 rotations, ejector pin mechanism 9 drives 91 times general who has surrendered's crankshaft workpiece 20 of thimble element and holds out against, and follow crankshaft workpiece 20 and rotate, brush device 8 drives brush element 81 rotations and polishes near compressing crankshaft workpiece 20 cylindricals, brush element 81 resets, six station calibration rotating disks 6 continue rotation and crankshaft workpiece 20 are turned to next polishing station, repeat above-mentioned polishing step, polish one of them periphery in four peripheries of crankshaft workpiece 20 at each polishing station place, and the polishing operation until finishing four polishing stations goes back to the feed station place at last, jaw 71 unclamps, the artificial crankshaft workpiece 20 of taking out is put into new not polishing crankshaft workpiece, finishes the polishing process of a crankshaft workpiece.
Above-described only is preferred embodiment of the present utility model; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the present utility model design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (9)
1. axle class polissoir, comprise frame, hood, controller, multistation calibration rotating disk and many group brush devices, described multistation calibration rotating disk is provided with the workpiece grip mechanism that many groups are used for the clamping shaft-like workpiece, described workpiece grip mechanism passes through feed station and a plurality of polishing station successively when rotating with described multistation calibration rotating disk, every group of described brush device is positioned at a described polishing station place, it is characterized in that: described hood inside is divided into the installation space on top and the polishing space of bottom by dividing plate, described brush device is installed on the described dividing plate and the main body of this brush device is positioned at described installation space, and described multistation calibration rotating disk and described workpiece grip mechanism are positioned at described polishing space.
2. axle according to claim 1 class polissoir, it is characterized in that: every group of described polishing station place is equipped be used to the top that holds out against described shaft-like workpiece to prevent the ejector pin mechanism of described shaft-like workpiece beat, and described ejector pin mechanism is installed on the described dividing plate and the main body of this ejector pin mechanism is positioned at described installation space.
3. axle according to claim 2 class polissoir, it is characterized in that: described multistation calibration rotating disk is six station calibration rotating disks, and described workpiece grip mechanism has six groups, and described brush device and ejector pin mechanism respectively have four groups, and described polishing station has four.
4. axle according to claim 2 class polissoir, it is characterized in that: described ejector pin mechanism comprises thimble element, thimble cylinder, thimble rod, described thimble cylinder drives described thimble rod vertical lift, fixedly there is thimble seat the lower end of described thimble rod, and described thimble element can be connected to described thimble seat with rotating freely.
5. axle according to claim 2 class polissoir, it is characterized in that: described brush device is installed on the described dividing plate by substrate, this brush device comprises brush element, hairbrush drive motors and cylinder, on the described substrate slide rail is installed, described hairbrush drive motors is fixed on the slide plate by the motor frame, this slide plate is slidably disposed on the described slide rail by slide block, and this slide plate is provided with spacing buffer.
6. axle according to claim 5 class polissoir, it is characterized in that: the cylinder rod of described cylinder is connected in a guide rod by a floating junction, this guide rod passes on the connecting plate that is fixed in described slide plate, this connecting plate is slidably disposed on the described guide rod by linear bearing fixed thereon, be provided with the back stop nut that is fixed on the described guide rod between described linear bearing and the described floating junction, the front end of described guide rod is provided with the front limit nut, is provided with the spring that is enclosed within on the described guide rod between described linear bearing and the described front limit nut.
7. axle according to claim 1 class polissoir, it is characterized in that: described workpiece grip mechanism clamps described shaft-like workpiece automatically and drives its rotation at described polishing station place, described workpiece grip mechanism unclamps described shaft-like workpiece automatically at described feed station place.
8. axle according to claim 1 class polissoir, it is characterized in that: described dividing plate is provided with air entry, is used for detaching the powder that floats on described polishing space.
9. axle according to claim 1 class polissoir, it is characterized in that: the below in described polishing space is provided with disposal box, is used for collecting the powder that is deposited in the described polishing space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701061 CN203031425U (en) | 2012-12-17 | 2012-12-17 | Polishing device for shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701061 CN203031425U (en) | 2012-12-17 | 2012-12-17 | Polishing device for shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203031425U true CN203031425U (en) | 2013-07-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701061 Expired - Fee Related CN203031425U (en) | 2012-12-17 | 2012-12-17 | Polishing device for shafts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203031425U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328547A (en) * | 2015-11-25 | 2016-02-17 | 苏州金逸康自动化设备有限公司 | Lifting and rotary dividing plate for automatic multi-station burr removal machine |
| CN105479318A (en) * | 2015-11-25 | 2016-04-13 | 赣州澳克泰工具技术有限公司 | Post-processing method for hard alloy coating cutter and hard alloy coating cutter |
| CN106346349A (en) * | 2016-10-28 | 2017-01-25 | 广东顺捷威玻璃机械有限公司 | Curved surface polishing machine |
| CN106475786A (en) * | 2016-11-07 | 2017-03-08 | 江苏宏宝电力有限公司 | A kind of bushing shell for transformer automatically grinding equipment |
| CN106914821A (en) * | 2015-12-24 | 2017-07-04 | 昌河飞机工业（集团）有限责任公司 | A kind of rolling clamp for the processing of metal specimen rubbing down |
| CN111376148A (en) * | 2020-04-23 | 2020-07-07 | 孟海洋 | Polisher of adjustable thickness of polishing |
| CN114952477A (en) * | 2022-06-20 | 2022-08-30 | 安徽中马磁能科技股份有限公司 | Blank deburring device for magnetic material processing |
-
2012
- 2012-12-17 CN CN 201220701061 patent/CN203031425U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328547A (en) * | 2015-11-25 | 2016-02-17 | 苏州金逸康自动化设备有限公司 | Lifting and rotary dividing plate for automatic multi-station burr removal machine |
| CN105479318A (en) * | 2015-11-25 | 2016-04-13 | 赣州澳克泰工具技术有限公司 | Post-processing method for hard alloy coating cutter and hard alloy coating cutter |
| CN106914821A (en) * | 2015-12-24 | 2017-07-04 | 昌河飞机工业（集团）有限责任公司 | A kind of rolling clamp for the processing of metal specimen rubbing down |
| CN106346349A (en) * | 2016-10-28 | 2017-01-25 | 广东顺捷威玻璃机械有限公司 | Curved surface polishing machine |
| CN106475786A (en) * | 2016-11-07 | 2017-03-08 | 江苏宏宝电力有限公司 | A kind of bushing shell for transformer automatically grinding equipment |
| CN106475786B (en) * | 2016-11-07 | 2018-11-20 | 江苏宏宝电力有限公司 | A kind of bushing shell for transformer automatically grinding equipment |
| CN111376148A (en) * | 2020-04-23 | 2020-07-07 | 孟海洋 | Polisher of adjustable thickness of polishing |
| CN111376148B (en) * | 2020-04-23 | 2021-03-12 | 孟海洋 | Polisher of adjustable thickness of polishing |
| CN114952477A (en) * | 2022-06-20 | 2022-08-30 | 安徽中马磁能科技股份有限公司 | Blank deburring device for magnetic material processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20171217 |