CN203069135U - Speed and position sensor for TOYO pressure die casting machine - Google Patents
Speed and position sensor for TOYO pressure die casting machine Download PDFInfo
- Publication number
- CN203069135U CN203069135U CN 201320008932 CN201320008932U CN203069135U CN 203069135 U CN203069135 U CN 203069135U CN 201320008932 CN201320008932 CN 201320008932 CN 201320008932 U CN201320008932 U CN 201320008932U CN 203069135 U CN203069135 U CN 203069135U
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- piston rod
- die casting
- casting machine
- speed
- winding
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- Expired - Lifetime
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- 238000004512 die casting Methods 0.000 title claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- 238000007747 plating Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to a speed and position sensor for a TOYO pressure die casting machine and belongs to the sensor technology field. The main characteristics are that a piston rod of an oil cylinder of the pressure die casting machine is utilized to be a movable iron core of a differential-transformer type displacement sensor, a plurality of copper ring plated layers are arranged on the piston rod in a spaced manner, a frame wound by an excitation winding and a secondary winding is sleeved on the piston rod; when AC and DC signals are entered in the excitation winding, an alternate magnetic field is formed in a length direction of the piston rod because of an effect of the short-circuit copper ring plated layers; when the piston rod moves in an excitation coil, speed signals and displacement signals are respectively output from a secondary coil. The speed and position sensor overcomes a problem that length of the conventional differential-transformer type displacement sensor increases by times with increasing of a displacement distance. To guarantee uniformly distributed primary and secondary winding inductance, reduce measurement deviation and overcome many deficiencies such as relatively difficult winding of the winding and mechanical processing of the sensor, the speed and position sensor is simple in a structure, significant in effects and has strong practicality.
Description
Technical field
The utility model relates to a kind of TOYO die casting machine speed, position transducer, belongs to sensor technical field.
Background technology
In the pressure casting process, because the movement velocity (low speed, high speed and low speed, high speed starting position) of injection rod, displacement, supercharging starting position have very significant effects to the quality of die-cast product, therefore, be homemade or the import die casting machine all uses various positions and speed pickup, be used for the variation of detection speed and displacement.Wherein the use of differential transformer type position transducer is comparatively general.Position transducer is exactly the innovative product of differential transformer type position transducer in the Japan TOYO die casting machine, introduces its principle of work and structure below.
The differential transformer type position transducer is made up of identical secondary coil s1, the s2 of a primary coil p, two structures and insertion coil intermediate movable iron core b and secured core a.One group of end of the same name of secondary wire s1, s2 links to each other in the differential transformer coil, and another is organized end of the same name and exports u0 as signal output part.After feeding the sinusoidal wave excitation signal ui of certain voltage, frequency at primary coil, secondary coil produces induced voltage u1, u2 by the effect of mutual inductance, and the size of u1, u2 (under the certain situation of ui) is relevant with iron core position in coil.
When removable iron core is positioned at the hub of a spool position, because coil s1, s2 structure are identical, number of turn line footpath is identical, u1=u2, u0=u1-u2=0 are arranged then
When removable iron core moves right, because the coefficient of mutual inductance of primary coil p and s1 becomes big, u1 ↑ increase; And the coefficient of mutual inductance of primary coil p and s2 diminishes, u2 ↓ reduce.U0=u1-u2 ﹥ 0 is then arranged
In like manner, when removable iron core is moved to the left, u0=u1-u2 ﹤ 0 is arranged then
Therefore, just can know direction and the distance that iron core moves as long as measure size and the phase place of output voltage.Simultaneously, we can try to achieve size and the related factor of output voltage by mathematic calculation.
Be it=i0+iacos ω t if feed the exciting current of elementary winding, u0=d (M1-M2) it/dt then.Wherein i0 is the DC component in the exciting current; M1, M2 are respectively the coefficient of mutual inductance of primary coil p and secondary coil s1, s2.Coefficient of mutual inductance M1=M2=M0 when removable iron core is positioned at the hub of a spool position.Distance is for x if iron core moves right, because winding evenly coiling △ M=Kx (K coil mutual induction amount is with the coefficient of change in displacement), then M1=M0+ △ M=M0+Kx M2=M0-△ M=M0-Kx along its length.Through calculating u0=2Ki0dx/dt+2Kiacos ω t dx/dt-2Kxia ω sin ω t.
Wherein 2Ki0dx/dt is DC component, and is irrelevant with the AC signal that feeds coil, and is proportional to the movement velocity dx/dt of iron core; 2Kxia ω sin ω t is the simple alternating current component, and is irrelevant with the direct current signal of input, and is proportional to the displacement x of iron core.By top mathematical analysis as can be known: if only feed direct current signal in field coil, then the output of differential transformer directly reflects the movement velocity of iron core; If only feed AC signal in field copper, then the output of differential transformer directly reflects the displacement of iron core; If in field copper, feed the AC and DC signal simultaneously, then the output of differential transformer not only can be measured the speed of iron core, and can measure the displacement of iron core, simultaneously differential transformer transducer has characteristics such as measuring accuracy height, sensitivity, simple in structure, dependable performance, therefore is used widely.
Summary of the invention
The purpose of this utility model provides a kind of TOYO die casting machine speed, position transducer, though existing differential transformer displace has above-mentioned plurality of advantages, along with the increase of shift length, the length of its sensor also is multiplied.When measuring distance was 500 ㎜, the entire length of its sensor can reach 1500 ㎜., inferior winding inductance first in order to guarantee is evenly distributed, and reduces measured deviation, and the coiling of winding and the machining of sensor is difficulty relatively, is difficult to satisfy its technological requirement.Therefore along with the increase of measuring length, its measuring accuracy and sensitivity descend.Along with the increase of length, the installation site is restricted on the other hand, can't install at all.The utility model overcomes above-mentioned shortcoming, adopts the modified differential transformer displace.
The purpose of this utility model is achieved through the following technical solutions; a kind of TOYO die casting machine speed, position transducer; comprise field copper and secondary winding; it is characterized in that; with the piston rod of the die casting machine removable iron core as differential transformer displace; the skeleton that is wound with field copper and secondary winding is nested with on piston rod, and skeleton and die casting machine body are fixed, the medial surface of piston rod chromium plating protective seam even some roads copper ring coating at interval on the piston rod length direction.
The about 10-12 ㎜ of the spacing of described adjacent copper ring coating, the width 6-10 ㎜ of each copper ring coating, thickness 0.5-0.8 ㎜.
The piston rod of the utility model by utilizing the oil cylinder of die casting machine own is as the removable iron core of differential transformer displace, some copper ring coating are set on piston rod at interval, the skeleton that will be wound with field copper and secondary winding again is nested with on piston rod, when feeding, field copper hands over, behind the direct current signal, because the effect of short circuit copper ring coating, form alternating magnetic field at the piston rod length direction, when piston rod moves in field coil, difference output speed signal and displacement signal in secondary coil, the utility model has overcome existing differential transformer displace along with the increase of shift length, and the length of its sensor also is multiplied.For guarantee just, inferior winding inductance is evenly distributed, and reduces measured deviation, the coiling of winding and the machining of sensor is many deficiencies such as difficulty relatively, the utility model is simple in structure, effect is remarkable, has very strong practicality.
Description of drawings
Fig. 1 is for having the piston rod construction synoptic diagram of copper ring coating in the utility model;
Fig. 2 is the skeleton structure synoptic diagram of coiling field copper and secondary winding in the utility model;
Among the figure, 1 piston rod, 2 copper ring coating, 3 pistons, 4 chromium plating protective seams, 5 skeletons.
Embodiment
Further specify the utility model in conjunction with the accompanying drawings and embodiments; as shown in Figure 1; with the piston rod 1 of the die casting machine removable iron core as differential transformer displace; its top layer is chromium plating protective seam 4, and about 0.1 ㎜ of thickness is in the inside of chromium plating protective seam 4; on piston rod 1 length direction, be uniform-distribution with some road short circuit copper ring coating 2; the about 10-12 ㎜ of the spacing of adjacent copper ring coating 2, the width 6-10 ㎜ of each copper ring coating 2, thickness 0.5-0.8 ㎜.
Be wound with the skeleton 5 of field copper and secondary winding as shown in Figure 2.For the ease of the detection respectively of rate signal and displacement signal, adopt two groups of differential wave outputs, the skeleton 5 that is wound with field copper and secondary winding is nested with on piston rod 1, and skeleton 5 is fixed with the die casting machine body.After field copper feeds the AC and DC signal, because the effect of short circuit copper ring coating 2 forms alternating magnetic field at piston rod 1 length direction.When piston rod 1 moves in field coil, difference output speed signal and displacement signal in secondary coil, through after deliver to display circuit behind the level decoding amplifying circuit, like this, the die carter performer just can make it reach the requirement of technological design by the variation of man-machine interface adjustment and observation injection speed and position.For die casting production high-quality, efficient, low consumption product have been brought into play positive role.
The maintaining of TOYO die casting machine position transducer
Because therefore the stable performance of TOYO die casting machine position transducer, precision height, fast, the compact conformation of response speed are used widely.But its price too high (being example with TOYO350T, about 60,000 yuan of a cover sensor, decoding amplifier, 60,000 yuan in piston rod one cover) in case break down or damage, not only causes economic loss, and because procurement cycle is long, may cause stopping production.Therefore, should carry out the maintaining of sensor from the following aspects, the generation that reduces or stop this type of accident.
1) in order to protect sensing coil, prevent that aluminium bits, aluminium slag enter in the sensor in injection process, equipment manufacturers set up dust-blocking ring in the front of sensing coil.For the user, through trimestral use, should check that dust-blocking ring has or not breakage, in case damaged replacing in time.Otherwise will cause the damage of sensing coil and piston rod top layer chromium coating.
2) be enclosed within on the piston rod owing to sensing coil, and piston rod directly links to each other with oil cylinder, in case its O-ring seal damages, its hydraulic oil will infiltrate sensing coil, and hydraulic oil in use unavoidably can be sneaked into some moisture content and impurity, in case enter sensing coil, its resistance, inductance and distributed capacitance will change, the phenomenon of prohibited data detection and false alarm happens occasionally, and die casting machine can not normally be moved.Damage 70% because the O-ring seal damage causes according to the statistics position transducer, therefore, the piston rod packing circle should check once in every month, in case leak, in time changed.
3) piston rod was through the use in several years, fail in time to change owing to normal wear or owing to dust-blocking ring damages, aluminium bits, aluminium slag enter between sensing coil and the piston rod, cause piston rod surface cut or wearing and tearing, the chromium coating on its top layer will peel off, damage in case peel off the shaped framework coil that will make oil seal circle and sensing coil, lose huge.Therefore should in time handle.Disposal route: at first survey and draw the physical dimension of piston rod, remove former chromium coating with the method for galvanic corrosion again, in case chromium coating is removed, stop immediately, can't corrode copper ring, grind and electroplate again, grind with high-precision grinder, and recover life size.
Claims (2)
1. a TOYO die casting machine speed, position transducer; comprise field copper and secondary winding; it is characterized in that; with the piston rod of the die casting machine removable iron core as differential transformer displace; the skeleton that is wound with field copper and secondary winding is nested with on piston rod; skeleton and die casting machine body are fixed, the medial surface of piston rod chromium plating protective seam even some roads copper ring coating at interval on the piston rod length direction.
2. TOYO die casting machine speed according to claim 1, position transducer is characterized in that, the about 10-12 ㎜ of the spacing of described adjacent copper ring coating, the width 6-10 ㎜ of each copper ring coating, thickness 0.5-0.8 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320008932 CN203069135U (en) | 2013-01-09 | 2013-01-09 | Speed and position sensor for TOYO pressure die casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320008932 CN203069135U (en) | 2013-01-09 | 2013-01-09 | Speed and position sensor for TOYO pressure die casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069135U true CN203069135U (en) | 2013-07-17 |
Family
ID=48767913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320008932 Expired - Lifetime CN203069135U (en) | 2013-01-09 | 2013-01-09 | Speed and position sensor for TOYO pressure die casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203069135U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752797A (en) * | 2013-12-25 | 2014-04-30 | 苏州三基铸造装备股份有限公司 | Direct reading type injection control system |
| CN105114394A (en) * | 2015-09-06 | 2015-12-02 | 四川泸州派克斯液压机械有限公司 | Structure capable of improving sealing performance of ultra-high pressure oil cylinder |
| CN106694842A (en) * | 2016-12-30 | 2017-05-24 | 宁波海天金属成型设备有限公司 | Die-casting machine with injection position detection device |
| WO2017210464A1 (en) * | 2016-06-01 | 2017-12-07 | The Board Of Regents For Oklahoma State University | Wound roll quality instrument and method |
-
2013
- 2013-01-09 CN CN 201320008932 patent/CN203069135U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752797A (en) * | 2013-12-25 | 2014-04-30 | 苏州三基铸造装备股份有限公司 | Direct reading type injection control system |
| CN105114394A (en) * | 2015-09-06 | 2015-12-02 | 四川泸州派克斯液压机械有限公司 | Structure capable of improving sealing performance of ultra-high pressure oil cylinder |
| WO2017210464A1 (en) * | 2016-06-01 | 2017-12-07 | The Board Of Regents For Oklahoma State University | Wound roll quality instrument and method |
| CN106694842A (en) * | 2016-12-30 | 2017-05-24 | 宁波海天金属成型设备有限公司 | Die-casting machine with injection position detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |