CN1519412A - Sewing machine and its parts - Google Patents
Sewing machine and its parts Download PDFInfo
- Publication number
- CN1519412A CN1519412A CNA2004100040397A CN200410004039A CN1519412A CN 1519412 A CN1519412 A CN 1519412A CN A2004100040397 A CNA2004100040397 A CN A2004100040397A CN 200410004039 A CN200410004039 A CN 200410004039A CN 1519412 A CN1519412 A CN 1519412A
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- China
- Prior art keywords
- slipper
- sewing machine
- accessaries
- mentioned
- high rigidity
- Prior art date
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- 238000009958 sewing Methods 0.000 title claims abstract description 121
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000005299 abrasion Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims description 63
- 239000012530 fluid Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000010687 lubricating oil Substances 0.000 abstract description 24
- 239000000470 constituent Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- 239000012224 working solution Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 12
- 230000008646 thermal stress Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 208000034189 Sclerosis Diseases 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000005240 physical vapour deposition Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 206010034703 Perseveration Diseases 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
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- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- WEAMLHXSIBDPGN-UHFFFAOYSA-N (4-hydroxy-3-methylphenyl) thiocyanate Chemical compound CC1=CC(SC#N)=CC=C1O WEAMLHXSIBDPGN-UHFFFAOYSA-N 0.000 description 1
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- OFEAOSSMQHGXMM-UHFFFAOYSA-N 12007-10-2 Chemical compound [W].[W]=[B] OFEAOSSMQHGXMM-UHFFFAOYSA-N 0.000 description 1
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 1
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910039444 MoC Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910026551 ZrC Inorganic materials 0.000 description 1
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- SJKRCWUQJZIWQB-UHFFFAOYSA-N azane;chromium Chemical compound N.[Cr] SJKRCWUQJZIWQB-UHFFFAOYSA-N 0.000 description 1
- CFJRGWXELQQLSA-UHFFFAOYSA-N azanylidyneniobium Chemical compound [Nb]#N CFJRGWXELQQLSA-UHFFFAOYSA-N 0.000 description 1
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 1
- LGLOITKZTDVGOE-UHFFFAOYSA-N boranylidynemolybdenum Chemical compound [Mo]#B LGLOITKZTDVGOE-UHFFFAOYSA-N 0.000 description 1
- XTDAIYZKROTZLD-UHFFFAOYSA-N boranylidynetantalum Chemical compound [Ta]#B XTDAIYZKROTZLD-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 229910021357 chromium silicide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- 229910021344 molybdenum silicide Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- -1 ramet Chemical compound 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 description 1
- 229910021355 zirconium silicide Inorganic materials 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
Provided is a sewing machine and a component thereof which reduce the amount of supply of lubricating oil to the utmost and also improves the abrasion resistance of a sliding portion, thus preventing a seizure of a sliding component.The component, e.g. a needle rod, which has a portion sliding on another component is prepared by welding a high-hardness constituent having a tungsten carbide to the sliding portion by using a phenomenon of electric discharge in a working solution. Thereby the abrasion resistance in the sliding portion of the needle rod is improved and the abrasion and the seizure of the sliding portion are prevented effectively, while, in addition, the amount of supply of the lubricating oil is reduced to the utmost.
Description
Technical field
The present invention relates to for example do one's utmost to suppress the Sewing machines and the parts thereof of lubricating oil quantity delivered.
Background technology
In the industrial sewing machines,, require the running speed high speed in order to improve sewing work efficiency.In order to realize the high speed of this running speed, must improve the abrasion performance of the slipper of the slide unit in the Sewing machines each several part, prevent that slide unit generation heating is deadlocked.
In order to improve the abrasion performance of above-mentioned slipper, prevent that slide unit generation heating is deadlocked, take following way in the prior art.For example, slipper is increased the lubricating oil quantity delivered more; The slipper of slide unit is implemented the heat treatment of soaking carbon processing, quenching and tempering etc., to improve the hardness of this slipper; Cover the surface (for example Japanese kokai publication hei 6-71076 communique) of slide unit with the high rigidity ceramic layer of titanium nitride or titanium carbide etc.; On slipper, apply for example solid lubrication wet goods of molybdenum bisuphide etc.
Slipper is increased in the prior art of lubricating oil quantity delivered, lubricating oil can be splashed to the Sewing machines outside sometimes.For example, when increasing the lubricating oil quantity delivered on the needle bar that slides up and down toward the leading section at sewing machine arm, along with the knee-action of needle bar, lubricating oil can be splashed to the Sewing machines outside sometimes.At this moment, be positioned at the sewn object of sewing machine arm below, the lubricating oil that can be splashed is made dirty.
Improve with heat-treating methods in the prior art of slipper hardness, the slipper before the hardness ratio heat treatment of above-mentioned slipper increases slightly.But, only slipper is heat-treated, can not obtain can not fully satisfying the requirement of running speed high speed as the required abrasion performance of slipper.
In the prior art of above-mentioned Japanese kokai publication hei 6-71076 communique record, be to form ceramic layer with physical vapor deposition (abbreviating the PVD method as, PVD:Physical Vapour Deposition).In order to make this ceramic layer have sufficient adhesive strength, must have more than 300 ℃, best treatment temperature about below 450 ℃ more than 400 ℃ for slide unit.This treatment temperature surpassed temperature in the above-mentioned heat treatment, promptly more than 200 ℃ below 250 ℃.Like this, in the forming process of ceramic layer, reduce to heavens as the case hardness of the slide unit of mother metal.Because above-mentioned treatment temperature makes slide unit be out of shape because of thermal stress.Like this, the shape of slide unit produces undesired deformation, and its dimensional accuracy substantially exceeds predetermined scope sometimes.
In the prior art of coating aforementioned fixation lubricating oil, when coating, because the coating treatment temperature makes slide unit be out of shape because of thermal stress.Therefore, the shape of slide unit produces undesired deformation, and its dimensional accuracy substantially exceeds predetermined scope sometimes.Particularly for high precision part relatively thin in the accessaries of sewing machine, in case when this slide unit is out of shape because of thermal stress, can not revises by following process, and become defective work.These utilize the covering of ceramic layer to handle and coating is handled, since above-mentioned, treatment temperature can not be set very high, so, can not get sufficient adhesive strength.Like this, because sliding friction, processing layer peels off from mother metal easily.
Summary of the invention
For this reason, the purpose of this invention is to provide the quantity delivered that can do one's utmost to suppress lubricating oil, improve the slipper abrasion performance, can prevent that slide unit from producing heating deadlocked Sewing machines and parts thereof.
Accessaries of sewing machine of the present invention has the slipper of relative slip with other parts, it is characterized in that, utilizes the electric discharge phenomena in the working fluid, by the high rigidity composition with tungsten carbide is deposited on the slipper, improves the abrasion performance of above-mentioned slipper.
According to the present invention, accessaries of sewing machine with slipper of relative slip with other parts, utilize the electric discharge phenomena in the working fluid, high rigidity composition with tungsten carbide is deposited on the slipper, thus, can do one's utmost to suppress the quantity delivered of lubricating oil, thereby prevent the abrasion of slipper effectively and produce heating deadlocked.
Especially, the electric discharge phenomena owing to utilizing in the working fluid are deposited on the slipper high rigidity composition, so, needn't improve treatment temperature as prior art, can effectively the high rigidity composition be deposited on the slipper.Therefore, compare, almost do not have thermal stress to act on the slipper of accessaries of sewing machine, can not produce distortion because of thermal stress with above-mentioned prior art.Because can be deposited over high rigidity composition effectively on the above-mentioned slipper with tungsten carbide, so, can prevent that this high rigidity composition from coming off.The shape that can prevent accessaries of sewing machine produces undesired deformation, its dimensional accuracy can be limited in the predetermined scope.
Among the present invention, it is characterized in that above-mentioned high rigidity composition also has nickel and chromium.
According to the present invention, have the high rigidity composition of tungsten carbide owing to also have nickel and chromium, can improve the corrosion resistance of slipper.Like this, can suppress lubricating oil quantity delivered more to slipper.Can prevent that lubricating oil is splashed to the Sewing machines outside along with the action of Sewing machines, can prevent to stitch the lubricating oil sewn object of making dirty.
Among the present invention, it is characterized in that accessaries of sewing machine uses as the parts of bending needing mechanism.
Among the present invention, it is characterized in that accessaries of sewing machine uses as the parts of needle bar slide mechanism.
Sewing machines of the present invention has 2 slide units of mutual slip, it is characterized in that, utilizes the electric discharge phenomena in the working fluid, and the high rigidity composition with tungsten carbide is deposited on the slipper of at least one side in above-mentioned 2 slide units.
According to the present invention, Sewing machines has 2 slide units of mutual slip.Utilize the electric discharge phenomena in the working fluid, the high rigidity composition with tungsten carbide is deposited on the slipper of at least one side in above-mentioned 2 slide units.Like this, slide unit can improve the abrasion performance of slipper, can do one's utmost to suppress the lubricating oil quantity delivered to slipper, thereby prevents the abrasion of slipper effectively and produce heating deadlocked.Especially, utilize the electric discharge phenomena in the working fluid, the high rigidity composition is deposited on the slipper, so, needn't improve treatment temperature as prior art, can effectively the high rigidity composition be deposited on the slipper.
Compared with prior art, on the slipper of slide unit, act on thermal stress hardly, can not be out of shape because of thermal stress.And, having the high rigidity composition of tungsten carbide, can be deposited over effectively on the above-mentioned slipper, so, can prevent that this high rigidity composition from coming off.The shape that can prevent slide unit produces undesired deformation, its dimensional accuracy can be limited in the predetermined scope.Owing to above-mentioned, can realize the running speed high speed of Sewing machines.
The simple declaration of accompanying drawing
For purpose of the present invention, characteristic and advantage, can from following detailed explanation and accompanying drawing, understand more.
Description of drawings
Fig. 1 is the stereogram of the Sewing machines of the present invention's one example.
Fig. 2 is that expression is as one of accessaries of sewing machine sectional drawing example, the bending needing mechanism major part.
Fig. 3 is that expression is as one of accessaries of sewing machine sectional drawing example, the bending needing mechanism major part.
Fig. 4 is the sectional drawing of expression as the action another example, needle bar of accessaries of sewing machine.
Fig. 5 is the stereogram of the flat lock stitch Sewing machines of another example of the present invention.
Fig. 6 is with comprising the imaginary plane of looper rod (Le one パ rod) axis, the sectional drawing that the major part of the curved needle drive device of flat lock stitch Sewing machines is cut open.
The specific embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the stereogram of the Sewing machines 1A of the present invention's one example.For example as the Sewing machines 1A of overseam Sewing machines, have sewing machine stand 50, transverse slat 51 and cover 52, transverse slat 51 is topped firmly the accessaries of sewing machine that is located on this sewing machine stand 50.Before being also referred to as, above-mentioned cover 52 uncaps.These transverse slats 51 and cover 52, but be located on the sewing machine stand 50 respectively freely openable.Under the state that transverse slat 51 or cover 52 are opened, can carry out the cleaning and the adjusting of accessaries of sewing machine.On sewing machine stand 50, be provided with the aftermentioned bending needing mechanism 53 that constitutes by several accessaries of sewing machine.On the sewing machine head 50a of sewing machine stand 50, be provided with up and down reciprocatingly the aftermentioned needle bar 16 of action, keeping pin 4 at the leading section of this needle bar 16.Below, the driving direction one side C1 of pin 4 is called top C1, driving direction the opposing party C2 of pin 4 is called below C2.
Be located among several accessaries of sewing machine on the above-mentioned Sewing machines 1A, have the accessaries of sewing machine of the relative slipper that slides, improved the abrasion performance of slipper with other parts.Utilize the electric discharge phenomena in the working fluid, the high rigidity composition that for example has tungsten carbide is deposited on the slipper.Like this, improved the abrasion performance of above-mentioned slipper.
Specifically, metal machine for sewing parts and electrode, separate predetermined narrow spacing and liftoffly be configured in working fluid in opposite directions, be that electric conductivity carbonization hydrogen is in the processing oil as deposited object.In addition, the pulse power is set, the negative terminal of pulse power supply is electrically connected with the electrode side, the plus end of pulse power supply is electrically connected with the accessaries of sewing machine side.
The metal that above-mentioned electrode adopted is made of tungsten carbide.But do not limit is tungsten carbide.The metal that electrode adopted, for example can mixed with titanium, at least one metal in titanium carbide, niobium carbide, ramet, zirconium carbide, vanadium carbide, molybdenum carbide, chromium nitride, silicon nitride, tantalum nitride, titanium nitride, zirconium nitride, niobium nitride, vanadium nitride, chromium silicide, zirconium silicide, tungsten silicide, tantalum silicide, titanium silicide, niobium silicide, molybdenum silicide, chromium boride, zirconium boride, tantalum boride, tungsten boride, titanium boride, niobium (Nb) boride, molybdenum boride and the lanthanum boride comes compression molding, become semi-sintered condition and use, it is that hydrocarbon is a processing oil that working fluid does not limit yet.
Like this, in working fluid, be positive side from the accessaries of sewing machine side, produce the electron stream of the high current density that flows to the minus side electrode.The position that electronics in the electrode arrives becomes high temperature, and electrode melts, and is released between the electrode of consumption.At this moment, face the slipper of the accessaries of sewing machine of electrode, become the semi-molten state.
Heat that working fluid is discharged and electron stream decompose.So the formation element of working fluid is a carbon content, produce negative ionization.Above-mentioned anion and melt the constituent chemical bond of the electrode that, like this, generate negative ionization the high rigidity composition.The part of the high rigidity composition that generates is soaked into successively and is accumulated in the slipper of semi-molten state.
At last, at a surface element of above-mentioned slipper, for example forming, thickness is about the sclerosis overlay film that 0 μ m is above, 20 μ m are following.Be faced with the inside of the slipper of aforementioned sclerosis overlay film, form the sclerosis upgrading layer that dark about 5 μ m are above, 15 μ m are following.These sclerosis overlay films and sclerosis upgrading layer are equivalent to the high rigidity composition.After above-mentioned sclerosis upgrading layer forms, remove electric discharge phenomena, mechanicalness is removed the sclerosis overlay film.
This case applicant, the accessaries of sewing machine that various metal materials are made and on above-mentioned accessaries of sewing machine deposited parts with tungsten carbide high rigidity composition, use identical conditions, implemented the DPH test.From result of the test as can be known, the deposited accessaries of sewing machine of high rigidity composition is compared with the accessaries of sewing machine of the identical material of not deposited high rigidity composition, can obtain about DPH more than 1.8 times, below 2.4 times.
Fig. 2 and Fig. 3 are that expression is as sectional drawings accessaries of sewing machine one example, bending needing mechanism 53 major parts.This bending needing mechanism 53 is housed in the sewing machine stand 50 of above-mentioned Sewing machines 1A, and under the state of opening cover 52, it is exposed to the outside of Sewing machines 1A.Above-mentioned bending needing mechanism 53 has looper guiding metalwork 11, looper guide member 12, looper rod 9, goes up looper 10, curved needle crank 13 and curved needle crank pin 4, curved needle shaft 15.
On above-mentioned looper guide member 12, form the guide hole 12a that radially connects.Looper rod 9 under the state that passes guide hole 12a, can be free to slide along its longitudinally.In longitudinally one end (upper end) of looper rod 9, connecting and going up looper 10.Longitudinally the other end (bottom) at looper rod 9 is being connected curved needle shaft 15 by curved needle crank 13 with curved needle crank pin 14.Above-mentioned curved needle shaft 15 by the transmission of the lower shaft that does not show from figure, rotates in predetermined angular range repeatedly.Rotate repeatedly correspondingly with this, curved needle crank 13 is around the axis direction swing of parallel above-mentioned axis direction.
By the swing of above-mentioned curved needle crank 13, the bottom of looper rod 9 is brought to, leaves behind.Like this, looper rod 9 slides in the guide hole 12a of looper guide member 12 at high speed, swings along with the rotation of looper guide member 12 simultaneously.Therefore, looper rod 9 perseveration between state shown in Figure 2 and state shown in Figure 3.By the perseveration of this looper rod 9, last looper 10 is perseveration between position shown in Figure 2 and position shown in Figure 3.
On above-mentioned looper rod 9, acting on resistance to sliding to guide hole 12a inner peripheral surface, also acting on the moment of flexure that produces along with swing simultaneously.In the present embodiment, for example, the slipper that slides at the inner peripheral surface that becomes relative guide hole 12a is on the outer peripheral face of looper rod 9, deposited high rigidity composition K1 with tungsten carbide.Like this, can alleviate above-mentioned resistance to sliding and the moment of flexure that acts on the looper rod 9.
Can prevent the abrasion that on the opening edge contact site of looper rod 9 and guide hole 12a, are easy to generate and generate heat deadlocked.In addition, also can be not at the deposited high rigidity composition of the outer peripheral face of looper rod 9 K1, but be on the guide hole 12a at the slipper at least of guide member 12, deposited high rigidity composition K1 with tungsten carbide.So also can alleviate above-mentioned resistance to sliding and moment of flexure, and, can prevent the abrasion that on the opening edge contact site of looper rod 9 and guide hole 12a, are easy to generate and generate heat deadlocked.
In addition, also can be on the slipper 11a of relative guide member 12 outer peripheral faces of guiding metalwork 11, deposited high rigidity composition K1 with tungsten carbide.Like this, can alleviate the resistance to sliding that acts between guide member 12 and the looper guiding metalwork 11.In addition, also can be at least one side of the slipper of relative these curved needle crank pin 14 outer peripheral faces of the outer peripheral face of curved needle crank pin 14 and looper rod 9, deposited high rigidity composition K1 with tungsten carbide.Like this, can alleviate the resistance to sliding that acts between curved needle crank pin 14 and the looper rod 9.
In looper guide member 12, also can be on a pair of surface element 12b that has perpendicular to the rotation plane, deposited high rigidity composition K1 with tungsten carbide.Like this, can alleviate above-mentioned surface element 12b and the resistance to sliding between other parts that slide on this surface element 12b that acts on looper guide member 12.
Fig. 4 is the sectional drawing of action of another routine needle bar 16 of expression accessaries of sewing machine.This needle bar 16 is located on the sewing machine head 50a of above-mentioned Sewing machines 1A.Needle bar 16 is configured in lining 17,18 guiding up and down respectively and up and down.Lining 17 interlockings are in the upper wall 19 of sewing machine head 50a, and lining 18 interlockings are in the lower wall 20 of Sewing machines 50a.By these linings 17,18, needle bar 16 is supported in 2 positions that separate along its longitudinally.
Between lining 17,18, in the middle of the longitudinally of needle bar 16 near portion, pair establishing needle bar to embrace (needle bar is embraced I) 21.Needle bar 16 is embraced 21 known transmission mechanism by comprising this needle bar, is connected with the axle of going up that the figure of sewing machine stand 50 inside does not show.Therefore, needle bar 16 is gone up axle correspondingly with above-mentioned, by lining up and down 17,18 guidings and up and down.
In the bottom of needle bar 16, pin 4 is installed by pin folder 22.Needle bar 16 moves up and down with long stroke H, thereby pin 4 is moved up and down.Along with this moves up and down, the outer peripheral face of needle bar 16 is with respect to the inner peripheral surface slip of lining 17,18 up and down.In this example, be the outer peripheral face of needle bar 16 at slipper, deposited high rigidity composition K1 with tungsten carbide.
Like this, can improve the abrasion performance of above-mentioned slipper.Can alleviate the resistance to sliding that acts between needle bar 16 and the lining 17,18.Therefore, needle bar 16 can be improved, the running speed high speed of Sewing machines 1A can be realized with respect to the sliding speed of lining 17,18 up and down.In other words, can eliminate the abrasion of needle bar 16 and lining 17,18 and generate heat deadlockedly, can make the running speed high speed.
In addition, also can replace, and be on the inner peripheral surface, deposited high rigidity composition K1 with tungsten carbide at the slipper at least of lining 17,18 at the deposited high rigidity composition of the outer peripheral face of needle bar 16 K1.At this moment also can be such as mentioned above, the heating of eliminating needle bar 16 and lining 17,17 is deadlocked, realizes the running speed high speed of Sewing machines 1A.
With regard to lubricant, in this example, increase lubricating oil quantity delivered not resembling in the prior art, but only to for example very thin lubricating grease of slipper coating, slipper can obtain good lubricating status to needle bar 16.Therefore, can realize the running speed high speed of Sewing machines 1A.
In addition, also can adopt and be called material oil-impregnated sintered metal, that in porous matter, contain lubricating oil and form lining 17,18.At this moment, also needn't increase the lubricating oil quantity delivered to needle bar 16, slipper can obtain good lubricating status.Therefore, can realize the running speed high speed of Sewing machines 1A, in addition, lubricating oil can not be splashed to Sewing machines 1A outside along with moving up and down of needle bar 16 yet.The lubricating oil that sewn object below sewing machine head 50a can not be splashed is made dirty.
Utilize the electric discharge phenomena in the working fluid, the high rigidity composition K1 with tungsten carbide is deposited on the slipper of accessaries of sewing machine after, also sometimes on above-mentioned slipper following process form some oil grooves or several oilholes.Then, on above-mentioned slipper, apply for example lubricating grease of one deck thinly, wiped clean again, lubricating grease just is maintained in oil groove or the oilhole, and slipper can keep good lubricating status for a long time.Like this, high rigidity composition K1 is deposited on the slipper of accessaries of sewing machine after, also sometimes above-mentioned high rigidity composition K1 is implemented the various following process of being convenient to lubricate.
According to above-mentioned Sewing machines 1A, have the accessaries of sewing machine of the slipper of relative slip with other parts, utilize the electric discharge phenomena in the working fluid, the high rigidity composition K1 with tungsten carbide is deposited on the slipper.Like this, accessaries of sewing machine can improve the abrasion performance of above-mentioned slipper, can do one's utmost to suppress the quantity delivered of lubricating oil, can prevent the abrasion of slipper effectively and produce heating deadlocked.
Owing to utilize electric discharge phenomena in the working fluid, the high rigidity composition is deposited on the slipper, so, improving treatment temperature needn't resembling in the prior art, can effectively high rigidity composition K 1 be deposited on the slipper.Therefore, compared with prior art, on the slipper of accessaries of sewing machine, act on thermal stress hardly, also can not produce distortion because of thermal stress.In the high precision part that the needle bar link pin that above-mentioned looper rod 9, curved needle crank pin 14, needle bar 16 and figure do not show etc. approaches, because in the above-mentioned thermal stress that acts on hardly when deposited, so their dimensional accuracy can not prevent the generation of defective work well beyond predetermined scope.And, owing to can be deposited over high rigidity composition K1 effectively on the above-mentioned slipper, so, can prevent that this high rigidity composition K1 from coming off from the accessaries of sewing machine as mother metal.
Like this, owing to the high rigidity composition K1 that is deposited on the accessaries of sewing machine slipper can not come off, so, among the Sewing machines 1A of this example, compare with the prior art of coating solid lubricant, can suppress the grinding powder that causes because of sliding friction.
The shape that can prevent accessaries of sewing machine produces undesired deformation, its dimensional accuracy can be limited in the predetermined scope.Even the dimensional accuracy of accessaries of sewing machine has exceeded preset range slightly,, also can simply its dimensional accuracy be limited in the preset range by this accessaries of sewing machine is implemented following process etc.In sum, can realize the running speed high speed of Sewing machines 1A.
Because high rigidity composition K1 is deposited on the slipper of accessaries of sewing machine, so, according to different accessaries of sewing machine, need only deposited high rigidity composition K1 on its part, just can reach above-mentioned effect.In other words, as long as on the part of above-mentioned accessaries of sewing machine, deposited high rigidity composition K1 just can improve the abrasion performance of this slipper, so, when deposited, can suppress the consumption of electrode.Therefore, can lower the manufacturing cost of each accessaries of sewing machine.
Fig. 5 is the stereogram of the flat lock stitch Sewing machines 1 of another example of the present invention.Fig. 6 is with the imaginary plane that comprises looper rod 32 axis, the sectional drawing that the major part of the curved needle drive device of flat lock stitch Sewing machines 1 is cut open.Sometimes above-mentioned flat lock stitch Sewing machines 1 is only called Sewing machines 1.Sewing machines 1 has fuselage 5.Fuselage 5 has the function of casing, is promptly accommodating the driving mechanism of driving needle 4 grades in fuselage 5.Above-mentioned fuselage 5 has 6, post 7 and arm 8.On 6, be provided with needle plate 2.Post 7 a from the beginning end of 6 is being established towards top C1 is upright.Arm 8 extends abreast from an end of post 7 along 6.
In fuselage 5, accommodating curved needle drive device 31.Curved needle drive device 31 makes the looper that the figure of above-mentioned Sewing machines 1 do not show and the synchronization action that moves up and down of pin 4.Above-mentioned looper is installed in longitudinally one end of looper rod 32 by the looper keeper (Le one パ ホ Le ダ) that figure does not show.
Curved needle drive device 31, the looper swing mechanism, the oscillatory forces transmission mechanism 35 that have drive unit body 33, looper rod 32, looper driving and reversing mechanism 34, looper rod 32 is not shown around the figure of its axis direction swing.Drive unit body 33 has looper guide member 36, supports the carrying cylinder 37,38 of this looper guide member 36.Carrying cylinder 37,38 is configured on the same axis.Carrying cylinder 37,38 is stationarily supported within on the fuselage 5 of Sewing machines 1, and looper guide member 36 can be around the axis direction swing of carrying cylinder 37,38.
Among the through hole 37a of looper rod 32 insertions one side's carrying cylinder 37, and can be free to slide towards above-mentioned axis direction.Longitudinally the other end of this looper rod 32, one side is outstanding from supporting plate 36a towards axis direction.In the other end of the longitudinally of above-mentioned looper rod 32, fixing slide block erecting bed 39 etc.
Looper driving and reversing mechanism 34 has curved needle shaft 41 and looper arm 42.Be supported in the looper rod 32 on the looper guide member 36, on pin driving direction the opposing party C2 of its longitudinally the other end, be provided with curved needle shaft 41.The axis direction of this curved needle shaft 41 is with the axis direction and the pin driving direction summary orthogonal of looper rod 32.In this example, " slightly orthogonal " comprised " orthogonal ".
In longitudinally one end of curved needle shaft 41, adorning looper arm 42 outward.This looper arm 42 is fixedly mounted on the curved needle shaft 41.In looper arm 42,, pay and establishing support 42a at the radial direction foreign side side end of curved needle shaft 41.Support 42a is maintained on longitudinally the other end of looper rod 32 slidably.Curved needle shaft 41 is connected by figure crank mechanism that does not show and the lower shaft that figure does not show.Curved needle shaft 41 is along with the rotation of above-mentioned lower shaft, and the axis direction of the needle shaft 41 of going for a stroll is swung.Looper arm 42 is maintained at the looper rod 32 on the support 42a thus slidably with 41 swings of this curved needle shaft, is driven by advance and retreat between a side of axis direction and the opposing party.
Oscillatory forces transmission mechanism 35 has looper guide member 36 and slide block 44.On looper guide member 36, form the guide hole 46 that comprises slit 45.Above-mentioned guide hole 46 extends along the direction that is parallel to looper rod 32 axis directions.The section of guide hole 46 is for omiting the V font, and the slide block 44 that can engage with this guide hole 46 is engaging with this guide hole 46.The part of above-mentioned slide block 44 is fixed on the slide block erecting bed 39 by slit 45.
By such structure, looper rod 32 is guided at above-mentioned axis direction by the slip along guide hole 46 of slide block 44, and simultaneously, looper rod 32 relatively rotating with respect to looper guide member 36 lived in slide block 44 constraints.In other words, by the slide block 44 that engages with guide hole 46, the oscillatory forces of looper guide member 36 is passed to looper rod 32.
On the slipper in above-mentioned curved needle drive device 31, for example aftermentioned slide unit, the deposited high rigidity composition K1 that has illustrated in the above-described embodiments with tungsten carbide.Like this, can improve the abrasion performance of above-mentioned slipper, do one's utmost to suppress the quantity delivered of lubricating oil, thereby prevent the abrasion of slipper effectively and produce heating deadlocked.Have the effect roughly same with above-mentioned example.
Specifically, at least one side in the slipper 37a that slides with respect to looper rod 32 outer peripheral faces of the outer peripheral face of looper rod 32 and carrying cylinder 37, deposited high rigidity composition K1 with tungsten carbide.In addition, at least one side in the slipper that slides with respect to slide block 44 surface elements of the surface element of the slide block 44 that fastens with guide hole 46 and looper guide member 36, deposited high rigidity composition K1 with tungsten carbide.On the slipper beyond other above-mentioned slippers, also can deposited above-mentioned high rigidity composition K1.
In other example of the present invention, high rigidity composition K1 is deposited to slipper, is not limited near above-mentioned needle bar 16 parts that comprise near looper rod 9 parts of looper rod 9 and comprise needle bar 16.For example, also can with needle bar embrace the needle bar ring (needle bar リ Application Network) that 21 figure that are connected do not show inner peripheral surface and in be contained at least one side in the outer peripheral face of needle bar battle pin of this needle bar ring inner peripheral surface deposited high rigidity composition K1 with tungsten carbide.Like this, can alleviate the resistance to sliding that acts between needle bar ring and the needle bar battle pin.Therefore, can improve the sliding speed of needle bar 16, further realize the running speed high speed of Sewing machines.
High rigidity composition K1 be deposited over accessaries of sewing machine on the whole after, sometimes, for example use modes such as machining again, remove the high rigidity composition K1 on the part that is deposited over beyond this slipper.In this example, be to the slipper of accessaries of sewing machine deposited comprehensively high rigidity composition K1, still, also can separate the deposited high rigidity composition K1 in appropriate intervals ground along glide direction.At this moment, when Sewing machines turns round and running when stopping the accessaries of sewing machine mother metal and high rigidity composition K1 between to act on hot exapnsion poor, the distortion of the high rigidity composition K1 that caused by this hot exapnsion difference can be bled off towards glide direction.Therefore, can prevent further that the abrasion of slipper and generation heating are deadlocked.
As mentioned above, make high rigidity composition be deposited over accessaries of sewing machine on the slipper with tungsten carbide, be provided in a side of on overseam Sewing machines and the flat lock stitch Sewing machines etc., but, be not limited to these Sewing machiness, for example, also can be located on the various industrial sewing machines such as double-chain chain stitch sewing machine, interlock seam sewing machine (bartacking machine), button attaching machine, Buttonhole sewing machine.Above-mentioned accessaries of sewing machine also is applicable to home-use Sewing machines.
Have the high rigidity composition of tungsten carbide, can also have nickel and chromium.This high rigidity composition when utilizing electric discharge phenomena in the working fluid to be deposited on the slipper, can improve the corrosion resistance of slipper.Therefore, can further suppress lubricating oil quantity delivered to slipper.
This case applicant, to the accessaries of sewing machine that constitutes by chrome-molybdenum steel on above-mentioned accessaries of sewing machine deposited high rigidity composition with tungsten carbide workpiece and on accessaries of sewing machine deposited workpiece with high rigidity composition of tungsten carbide, nickel, chromium, under identical conditions, implemented Kesternich test.
Test method is, each workpiece is immersed in the hydrochloric acid solution of concentration about 70% for example after the scheduled time, with its outward appearance of visual inspection.From result of the test as can be known, deposited workpiece with high rigidity composition of tungsten carbide, nickel, chromium is compared with other workpiece on accessaries of sewing machine, has good corrosion resistance.In above-mentioned each example, under the prerequisite that does not break away from the claim scope, can carry out the change of various parts.
The present invention under the prerequisite that does not break away from its spirit and principal character, can implement with other various forms.Therefore, the each point in the above-mentioned example only is that scope of the present invention is defined by the claims, and is not subjected to the qualification of this specification for example.In addition, various distortion and change in the claim scope, all within the scope of the invention.
Claims (5)
1. accessaries of sewing machine has the slipper of relative slip with other parts, it is characterized in that, utilizes the electric discharge phenomena in the working fluid, by the high rigidity composition with tungsten carbide is deposited on the slipper, improves the abrasion performance of above-mentioned slipper.
2. accessaries of sewing machine as claimed in claim 1 is characterized in that, above-mentioned high rigidity composition also has nickel and chromium.
3. accessaries of sewing machine as claimed in claim 1 is characterized in that, accessaries of sewing machine uses as the parts (9,11,12,14,32,36,37,44) of bending needing mechanism.
4. accessaries of sewing machine as claimed in claim 1 is characterized in that, accessaries of sewing machine uses as the parts (16,17,18) of needle bar slide mechanism.
5. Sewing machines has 2 slide units of mutual slip, it is characterized in that, utilizes the electric discharge phenomena in the working fluid, and the high rigidity composition with tungsten carbide is deposited on the slipper of at least one side in above-mentioned 2 slide units.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003027572A JP2004236769A (en) | 2003-02-04 | 2003-02-04 | Sewing machine and component thereof |
| JP027572/2003 | 2003-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1519412A true CN1519412A (en) | 2004-08-11 |
Family
ID=32955265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100040397A Pending CN1519412A (en) | 2003-02-04 | 2004-02-04 | Sewing machine and its parts |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2004236769A (en) |
| CN (1) | CN1519412A (en) |
| TW (1) | TW200417646A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6812623B2 (en) | 2016-07-22 | 2021-01-13 | ヤマトミシン製造株式会社 | sewing machine |
| JP2018114096A (en) | 2017-01-18 | 2018-07-26 | ヤマトミシン製造株式会社 | sewing machine |
-
2003
- 2003-02-04 JP JP2003027572A patent/JP2004236769A/en active Pending
-
2004
- 2004-01-27 TW TW93101720A patent/TW200417646A/en unknown
- 2004-02-04 CN CNA2004100040397A patent/CN1519412A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004236769A (en) | 2004-08-26 |
| TW200417646A (en) | 2004-09-16 |
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