CN113102953A - Machining method for improving flow nonlinearity of zero zone of servo valve - Google Patents
Machining method for improving flow nonlinearity of zero zone of servo valve Download PDFInfo
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- CN113102953A CN113102953A CN202110438376.0A CN202110438376A CN113102953A CN 113102953 A CN113102953 A CN 113102953A CN 202110438376 A CN202110438376 A CN 202110438376A CN 113102953 A CN113102953 A CN 113102953A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
Abstract
The invention discloses a processing method for improving the zero area flow nonlinearity of a servo valve, which comprises the following steps: step one, processing a valve sleeve working oil port; and step two, performing fine machining on the valve core shoulder by adopting a method for increasing the process reference surface. The invention mainly improves the zero zone nonlinearity of the servo valve by improving the verticality of the valve port and the valve center hole and reducing the two angles of the deviation of the valve port throttling edge corresponding to the valve core shoulder and the valve sleeve. On one hand, the perpendicularity of the valve port and the valve center hole is improved, so that the flow rate match grinding measurement result is more accurate; on the other hand, the measuring problem of the valve core shoulder surface in the multiple machining process is solved, the machining precision of parts is improved, the machining error is reduced, the overlapping amount of positive and negative overlapping is reduced, and therefore the zero-zone flow nonlinearity of the servo valve is improved. In addition, the processing method of the invention also has the effects of improving the processing efficiency, reducing the rejection rate and saving the cost.
Description
Technical Field
The invention relates to a method for improving the performance of a servo valve from the manufacturing perspective, in particular to a processing method for improving the zero flow nonlinearity of the servo valve.
Background
Since the servo valve is basically applied to a closed-loop servo valve system, the main working area of a slide valve pair of the servo valve is near a zero position, and different axial matching forms of the slide valve pair determine the zero position characteristic of the servo valve. In the manufacturing process of the electro-hydraulic servo valve, the milling of the superposed quantity of the valve core and the valve sleeve is a key process in the manufacturing process of the servo valve. The overlap amount refers to the axial fit size of the valve core shoulder surface (2-6, 2-7, 2-8 and 2-9 in figure 4) and the working edge of the corresponding valve port (1-2 and 1-6 in figure 3) of the valve sleeve when the valve core is positioned in the middle position of the valve sleeve (as shown in figure 1) of the slide valve matching part. The axial matching modes of the slide valve pair are generally divided into three types, namely positive overlap, negative overlap and zero overlap, the corresponding flow curves are respectively shown as a, b and c in fig. 2, and as can be seen from fig. 2, the positive overlap and the negative overlap both cause the flow nonlinearity of the servo valve in the zero area.
A great deal of research is carried out in China on the zero position characteristic of the servo valve. CN110539221A and CN104096852A mainly study methods for removing tiny burrs on the shoulder of the valve core; CN106041233A discloses a valve barrel orifice linear cutting frock, this frock have fast, the accurate positioning clamping to and guarantee advantages such as coplane degree on linear cutting processing square hole throttle work limit, but according to the frock structure can know, this frock does not possess more important function: the verticality between the square hole throttling surface and the middle hole cannot be accurately ensured; CN201470949U proposes a deburring mechanism and a method for an orifice in a throttling sleeve of a servo valve; CN104481950A, CN104373405A and CN104454730A respectively show the processing methods of a valve sleeve, a valve body and a valve core of a servo valve of a certain type, but the processing methods only introduce the process routes of the parts in a general way and do not introduce relevant processing procedures for influencing the characteristics of a zero zone; CN101402180A discloses a method for measuring the overlap amount of a servo valve, which is not described for how to machine an important valve element shoulder; CN102720876A discloses a soft match grinding method for eliminating dead zone of no-load flow characteristic of electro-hydraulic servo valve by superimposing high frequency flutter signal, which improves the servo zero zone characteristic from the control angle, but has the risk of causing poor stability of servo valve, and the method only improves the flow curve from the surface, and does not change the essence of poor performance of servo valve.
In summary, the research on the zero position characteristic of the servo valve mainly focuses on deburring of the valve sleeve and the valve core, machining of the valve sleeve and the valve port of the valve sleeve, measuring (flow rate matching grinding) of the superposed quantity of the servo valve, soft matching grinding and the like, the machining of the valve core and the valve sleeve is carried out in a matching grinding mode, namely, a repeated process of measuring and grinding is carried out, the measurement usually adopts a flow rate matching grinding method, and the reason that the zero position characteristic of a flow rate curve is still not ideal even though the parts are subjected to flow rate matching grinding in the actual matching grinding process under the premise of ensuring the sharp edges of the shoulder of the valve core and the valve port is found:
1) valve pocket valve port and mesopore straightness difference that hangs down. Because the valve port is formed by linear cutting processing, two valve ports are generated by one-time processing, if the verticality is poor, the axial positions of the valve cores corresponding to the contact of the throttling edges of the two valve ports and the shoulder of the valve core are different inevitably, and the flow curve nonlinearity of the zero position area of the servo valve is caused.
2) The steps of the same valve core correspond to the four valve port throttling edges. Similarly, if the land of the spool does not correspond to the throttling edge of the valve port in the valve sleeve, the flow curve in the zero position area of the servo valve is also nonlinear.
Disclosure of Invention
The invention aims to provide a processing method for improving the zero-area flow nonlinearity of a servo valve, which mainly improves the zero-area nonlinearity of the servo valve by improving the perpendicularity of a valve port and a valve middle hole and reducing two angles of deviation between a valve core shoulder and a corresponding valve port throttling edge in a valve sleeve. On one hand, the perpendicularity of the valve port and the valve center hole is improved, so that the flow rate match grinding measurement result is more accurate; on the other hand, the measuring problem of the valve core shoulder surface in the multiple machining process is solved, the machining precision of parts is improved, the machining error is reduced, the overlapping amount of positive and negative overlapping is reduced, and therefore the zero-zone flow nonlinearity of the servo valve is improved.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a valve barrel straightness guarantees wire cut electrical discharge machining frock that hangs down, includes base, dabber, flat gasket, spring shim, back of the body lock nut, adjusting screw, compact heap, fastening screw, connecting screw, locating pin, wherein:
the base is fixed on the workbench through a fixing screw;
the mandrel is fixedly connected with the right end face of the base through a connecting screw;
the positioning pin is arranged in the matching hole of the base and the mandrel;
a threaded hole is formed in the base, a square groove is formed in the lower portion of the threaded hole, the adjusting screw is installed in the threaded hole, the pressing block is placed in the square groove of the base, and the pressing block is in clearance fit with the base;
the valve sleeve is tightly pressed on the right end surface of the conical surface of the mandrel through a back nut;
an elastic gasket and a flat gasket are arranged between the back nut and the valve sleeve.
A processing method for improving the non-linearity of the zero zone flow of a servo valve comprises the following steps:
step one, processing a valve sleeve working oil port:
1) fixing the base on the workbench through a fixing screw;
2) fixing the mandrel on the right end surface of the base through a connecting screw, and mounting a positioning pin in a matching hole of the base and the mandrel in the mounting process;
3) installing the valve sleeve on the mandrel, adding a flat gasket and a spring gasket, and tightly pressing the valve sleeve on the right end surface of the conical surface of the mandrel by using a back nut;
4) the right end face of the base is aligned by marking a meter, if the deviation is large, the zero setting screw is used for adjusting until the runout is less than or equal to 0.001;
5) a working oil port in the valve sleeve is machined in a linear cutting mode;
step two, adopting a method for increasing a process reference surface to perform fine machining on the valve core shoulder:
1) taking an unimportant shoulder surface on the valve core as a process reference surface, wherein the finish machining method of the valve core shoulder is cylindrical grinding, positioning by two apexes, and grinding the process reference surface and the shoulder surface to obtain light, wherein the process reference surface is only ground once;
2) removing burrs of the ground process reference surface and the shoulder surface completely by using a metallographic sponge, keeping sharp edges, and detecting the distance between the shoulder surface and the process reference surface by using a projection measuring instrument after the burrs are removed;
3) taking the valve sleeves machined by the linear cutting tool in the step, recording the serial numbers of the valve cores and the valve sleeves when the valve cores are axially matched and ground, and measuring the overlapping amount of each side by using a flow matching and grinding test bed;
4) the cylindrical grinding machine is positioned by two tops and grinds the shoulder surface of the valve core, theoretically, the remaining quantity of the valve core shoulder after the first grinding is 10% of the stroke m of the valve core, and the actual grinding quantity can be obtained by detecting the distance between each edge and a process reference surface through a projection measuring instrument;
5) deburring and cleaning, taking the valve sleeve in 3), and measuring the overlapping amount of each side of the valve core by using a flow rate distribution test bed;
6) the cylindrical grinding machine is positioned by two tops to grind the surface of the valve core shoulder, theoretically, the remaining quantity of the valve core shoulder after the second grinding is 3% of the stroke m of the valve core, and the actual grinding quantity can be obtained by detecting the distance between each edge and a process reference surface through a projection measuring instrument;
7) and (4) removing burrs by using metallographic abrasive paper, keeping sharp edges, cleaning the valve core, and finishing the matched grinding of the valve core.
Compared with the prior art, the invention has the following advantages:
the invention aims at the problem of nonlinear flow curve caused by common positive and negative overlapping of the servo valve, and improves the problem from the aspect of processing, on one hand, the perpendicularity of a valve sleeve valve port and a middle hole is ensured, on the other hand, the problem of measuring the shoulder surface of the valve core in the processing process is solved by adding a process reference surface, the influence of the shoulder surface on the cutter error in processing is weakened, the valve core shoulder of the servo valve is more accurately matched with the valve sleeve valve port, and the flow nonlinearity of a zero area of the servo valve is improved. In addition, the processing method of the invention also has the effects of improving the processing efficiency, reducing the rejection rate and saving the cost.
Drawings
FIG. 1 is a valve sleeve and core neutral position fit;
FIG. 2 is an overlapping version;
fig. 3 is a valve sleeve;
FIG. 4 is a valve cartridge;
FIG. 5 is a top view of a valve sleeve perpendicularity assurance linear cutting tool;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
FIG. 7 is an enlarged view of C in FIG. 6;
FIG. 8 is a left side view of a valve sleeve perpendicularity assurance linear cutting tool;
fig. 9 is a sectional view B-B of fig. 8.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The invention provides a valve sleeve verticality guaranteeing linear cutting tool, which is composed of a base 2, a mandrel 3, a flat gasket 4, a spring gasket 5, a back nut 6, an adjusting screw 7, a pressing block 8, a fastening screw 9, a connecting screw 10 and a positioning pin 11, as shown in figures 5 and 6, wherein:
the base 2 is fixed on the workbench through a fixing screw 9;
the mandrel 3 is fixedly connected with the right end face of the base 2 through a connecting screw 10;
the positioning pin 11 is arranged in the matching holes of the base 2 and the mandrel 3 and is used for preventing the mandrel from rotating relative to the base;
a threaded hole is formed in the base 2, the adjusting screw 7 is installed in the threaded hole, a square groove is formed in the lower portion of the threaded hole of the base, the pressing block 8 is placed in the square groove of the base, the pressing block 8 is in clearance fit with the base 2, and the zero adjusting screw 7 and the pressing block 8 are used for fine adjustment during alignment;
the back-up nut 6, the spring gasket 5 and the flat gasket 4 are used for fixing the valve sleeve on the mandrel;
the valve sleeve 1 is tightly pressed on the right end surface of the conical surface of the mandrel 3 through a back nut 6;
between the back nut 6 and the valve housing 1 is an elastic washer 5 and a flat washer 4.
The linear cutting tool has the function of ensuring the verticality of the valve sleeve valve ports (1-2 and 1-6) and the middle hole 1-1. Wherein: the bottom surface and the right end surface of the base 2 are mutually vertical and are processed in a plane grinding mode; the left end surface and the right end surface of the conical part of the mandrel 3 are parallel to each other and are formed by grinding and processing two tip positioning excircles; a tool withdrawal groove (see an enlarged view C in figure 7) is designed at the root part of the right side surface of the conical surface of the mandrel 3 and is used for grinding the slender rod and the conical surface; when the wire cutting is aligned, the adjusting screw 7 is finely adjusted by a wrench, and the base 2 slightly deflects by the pressure between the pressing block 8 and the workbench; the positioning pin 11, the base 2 and the mandrel 3 are in small clearance fit (see fig. 8 and 9), the mandrel 3 is prevented from rotating circumferentially relative to the base 2, and in addition, the positioning pin 11 has small holes and flat characteristics, so that the pressing and the dismounting are convenient.
As shown in figure 3, 1-1 in the figure is a valve sleeve central hole, 1-2 is a working oil port A, 1-3 is an O-shaped ring groove, 1-4 is a P port (oil inlet), 1-5 is an O-shaped ring groove, 1-6 is a working oil port B, 1-7 is an O-shaped ring groove, 1-8 is an R port (oil return port), a left end face 1-10 and a right end face 1-9 are processed by a method of penetrating a tensioning mandrel and positioning an external grinding machine by means of the central hole 1-1 to grind an end face, and the perpendicularity between the tensioning mandrel and the central hole 1-1 is less than or equal to 0.001.
As shown in fig. 4, in the figure, 2-1 and 2-4 are two tip holes of the valve core, 2-2 and 2-3 are pressure equalizing grooves of the valve core, 2-10 of the shoulder is matched with an opening a 1-2 of a working oil port in the valve sleeve, 2-11 of the shoulder is matched with an opening B1-6 of the working oil port in the valve sleeve, 2-6 and 2-7 are two shoulder surfaces of 2-10, 2-8 and 2-9 are two shoulder surfaces of 2-11, and 2-5 of the shoulder is a process reference surface.
In the invention, the wire cutting tool comprises the following use steps:
1) fixing the base 2 on the workbench through a fixing screw 9;
2) the mandrel 3 is fixed on the right side of the base 2 through a connecting screw 10, and a positioning pin 11 is arranged in a matching hole of the base 2 and the mandrel 3 in the installation process;
3) installing a valve sleeve 1 on a mandrel 3 according to the diagram shown in fig. 6, adding a flat gasket 4 and a spring gasket 5, and tightly pressing the valve sleeve on the right end surface of the conical surface of the mandrel 3 by using a back nut 6, and paying attention to the fact that a reserved line cutting hole in the valve sleeve 1 is vertically upward;
4) the right end face of the base is aligned by striking a meter, if the deviation is large, the zero setting screw 7 is used for adjusting until the runout is less than or equal to 0.001;
5) and a working oil port A1-2 and a working oil port B1-6 in the valve sleeve 1 are machined by linear cutting.
The processing of the valve core 2 shoulder (2-6, 2-7, 2-8, 2-9) is carried out by adopting a matching part matched grinding mode, and the actual grinding amount is measured by means of a technological reference surface. The fine machining steps of the valve core 2 shoulder are as follows:
1) the cylindrical grinding machine is positioned by two apexes, the chicken heart clamp is screwed down, and the process reference surface 2-5 and the shoulder surface (2-6, 2-7, 2-8 and 2-9) are ground for light, wherein the shoulder surface 2-5 is a process surface and is only ground once;
2) removing burrs of the ground process reference surface 2-5 and the shoulder surface (2-6, 2-7, 2-8 and 2-9) by using a metallographic sponge, keeping sharp edges, and detecting that the distances between the shoulder surface (2-6, 2-7, 2-8 and 2-9) and the process reference surface 2-5 are l respectively by using a projection measuring instrument1，l2，l3，l4；
3) Taking the valve sleeves (1) processed by the linear cutting tool, recording the numbers of the valve sleeves and the valve cores (1) to be axially matched and ground, and measuring the overlapping amount of each shoulder surface (2-6, 2-7, 2-8 and 2-9) to be x respectively by using a flow matching and grinding test bed1，x2，x3，x4；
4) The cylindrical grinding machine is positioned by two centers, the heart clamp is screwed down, the shoulder surfaces (2-6, 2-7, 2-8 and 2-9) are ground, the allowance after the first grinding is 10% of the valve core stroke m, and the size of each shoulder surface (2-6, 2-7, 2-8 and 2-9) is only guaranteed to be 2-5 of the process reference surface after the shoulder surfaces (2-6, 2-7, 2-8 and 2-9) are ground through a projection measuring instrument:
l'1＝l1+x1-0.1m；
l'2＝l2-x2+0.1m；
l'3＝l3+x3-0.1m；
l'4＝l4-x4+0.1m；
x1，x2，x3，x43) the overlap of the shoulder surfaces (2-6, 2-7, 2-8, 2-9); m is the valve core stroke; l1、l2、l3、l4The distances between the shoulder surfaces (2-6, 2-7, 2-8 and 2-9) and the process reference surface (2-5) before grinding are respectively; l'1、l'2、l'3、l'4Respectively are the ground shoulder surfaces (2-6, 2-7, 2-8, 2-9) andthe distance between the process reference planes 2-5.
5) Removing burrs and cleaning, taking 3) the middle valve sleeve, and measuring the overlapping amount x 'of each shoulder surface (2-6, 2-7, 2-8 and 2-9) of the valve core by using a flow rate mill test bench'1，x'2，x'3，x'4；
6) The cylindrical grinding machine is positioned by two apexes, the heart clamp is screwed down, shoulder surfaces (2-6, 2-7, 2-8 and 2-9) are ground, and the allowance after secondary grinding is 3% of the stroke m of the valve core; namely, after the shoulder surfaces (2-6, 2-7, 2-8 and 2-9) are ground, the sizes of the shoulder surfaces and the process reference surfaces 2-5 are only required to be ensured as follows:
l”1＝l'1+x'1-0.03m；
l”2＝l'2-x'2+0.03m；
l”3＝l'3+x'3-0.03m；
l”4＝l'4-x'4+0.03m；
l'1、l'2、l'3、l'4respectively, the distances between the shoulder surfaces (2-6, 2-7, 2-8 and 2-9) in the step 4) and the process reference surface 2-5; x'1，x'2，x'3，x'45) the overlap of the shoulder surfaces (2-6, 2-7, 2-8, 2-9); l'1、l”2、l”3、l”4Respectively the distances between the ground shoulder surfaces (2-6, 2-7, 2-8 and 2-9) and the process reference surface (2-5).
7) And (4) removing burrs by using metallographic abrasive paper, keeping sharp edges, cleaning the valve core, and finishing the matched grinding of the valve core.
When the valve core is ground, an unimportant surface is processed as a reference surface except the shoulder surface of the valve core to be processed; the surface and other shoulder surfaces are both ground and exposed to light, the machining work is cylindrical grinding, the machining method is that two centers are positioned, grinding is carried out by the side face of a grinding wheel, and the valve core process reference surface is machined once and used as a subsequent measurement reference. The valve core process datum plane has the following advantages:
1) the valve core process reference surface establishes the relation between the flow rate match grinding test result and the grinding machining, and the grinding amount in the machining process has a judgment basis and can be directly measured. The grinding amount of the valve element shoulder is small during grinding, a machine tool cannot identify whether tool setting is successful or not, the requirement on the grinding amount is strict in the machining process, and the accuracy is 1 mu m, so that the tool setting error becomes a main problem of grinding machining of the valve element shoulder, the influence of the tool setting error on the machining size is weakened due to the existence of the valve element process reference surface, and the size is detected only after machining, so that the machining accuracy is improved, the valve element shoulder size of the servo valve is matched with the valve port size of the valve sleeve more accurately, and the flow nonlinearity of a zero area of the servo valve is improved to a great extent.
2) Due to the existence of the valve core process datum plane, the grinding quantity of parts has a basis, the number of flow match grinding times is reduced, the processing time is shortened, the processing efficiency and the processing precision are improved, the rejection rate is reduced, and the processing cost is saved.
Claims (5)
1. The utility model provides a valve barrel straightness guarantees wire-electrode cutting frock that hangs down, its characterized in that the wire-electrode cutting frock includes base, dabber, flat gasket, spring shim, back of the body lock nut, adjusting screw, compact heap, fastening screw, connecting screw, locating pin, wherein:
the base is fixed on the workbench through a fixing screw;
the mandrel is fixedly connected with the right end face of the base through a connecting screw;
the positioning pin is arranged in the matching hole of the base and the mandrel;
a threaded hole is formed in the base, a square groove is formed in the lower portion of the threaded hole, the adjusting screw is installed in the threaded hole, the pressing block is placed in the square groove of the base, and the pressing block is in clearance fit with the base;
the valve sleeve is tightly pressed on the right end surface of the conical surface of the mandrel through a back nut;
an elastic gasket and a flat gasket are arranged between the back nut and the valve sleeve.
2. The valve pocket verticality guaranteeing linear cutting tool according to claim 1, wherein the bottom surface of the base and the right end surface are perpendicular to each other and are machined in a plane grinding manner.
3. The valve sleeve perpendicularity assurance linear cutting tool as recited in claim 1, wherein the left end face and the right end face of the mandrel cone portion are parallel to each other and are formed by grinding two tip positioning outer circles.
4. The valve pocket verticality guaranteeing linear cutting tool according to claim 1, wherein a tool withdrawal groove is designed at the root of the right side surface of the conical surface of the mandrel.
5. A processing method for improving the non-linearity of the zero zone flow of a servo valve is characterized by comprising the following steps:
step one, processing a valve sleeve working oil port:
1) fixing the base on the workbench through a fixing screw;
2) fixing the mandrel on the right end surface of the base through a connecting screw, and mounting a positioning pin in a matching hole of the base and the mandrel in the mounting process;
3) installing the valve sleeve on the mandrel, adding a flat gasket and a spring gasket, and tightly pressing the valve sleeve on the right end surface of the conical surface of the mandrel by using a back nut;
4) the right end face of the base is aligned by marking a meter, if the deviation is large, the zero setting screw is used for adjusting until the runout is less than or equal to 0.001;
5) a working oil port in the valve sleeve is machined in a linear cutting mode;
step two, adopting a method for increasing a process reference surface to perform fine machining on the valve core shoulder:
1) taking an unimportant shoulder surface on the valve core as a process reference surface, wherein the finish machining method of the valve core shoulder is cylindrical grinding, positioning by two apexes, and grinding the process reference surface and the shoulder surface to obtain light, wherein the process reference surface is only ground once;
2) removing burrs of the ground process reference surface and the shoulder surface completely by using a metallographic sponge, and detecting the distance between the shoulder surface and the process reference surface by using a projection measuring instrument after the burrs are removed;
3) taking the valve sleeves machined by the linear cutting tool in the step, recording the serial numbers of the valve cores and the valve sleeves when the valve cores are axially matched and ground, and measuring the overlapping amount of each side by using a flow matching and grinding test bed;
4) the cylindrical grinding machine is positioned by two tops and grinds the shoulder surface of the valve core, theoretically, the remaining quantity of the valve core shoulder after the first grinding is 10% of the stroke m of the valve core, and the actual grinding quantity can be obtained by detecting the distance between each edge and a process reference surface through a projection measuring instrument;
5) deburring and cleaning, taking the valve sleeve in 3), and measuring the overlapping amount of each side of the valve core by using a flow rate distribution test bed;
6) the cylindrical grinding machine is positioned by two tops to grind the surface of the valve core shoulder, theoretically, the remaining quantity of the valve core shoulder after the second grinding is 3% of the stroke m of the valve core, and the actual grinding quantity can be obtained by detecting the distance between each edge and a process reference surface through a projection measuring instrument;
7) and (4) removing burrs by using metallographic abrasive paper, keeping sharp edges, cleaning the valve core, and finishing the matched grinding of the valve core.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3543128A1 (en) * | 1984-12-21 | 1986-06-26 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | METHOD FOR PRODUCING A ONE-PIECE VALVE BUSHING FOR ROTARY VALVE |
| CN201511274U (en) * | 2009-10-16 | 2010-06-23 | 无锡市锡泵制造有限公司 | Excircle grinding tool for shaft sleeve |
| CN202985171U (en) * | 2013-01-18 | 2013-06-12 | 柳州迅捷汽车同步器有限公司 | Synchronizer gear sleeve shifting fork groove turning clamp |
| CN104096852A (en) * | 2014-06-23 | 2014-10-15 | 上海交通大学 | Optimization method for servo valve core working edge small burr online removal process system |
| CN104162836A (en) * | 2013-05-17 | 2014-11-26 | 昆山江锦机械有限公司 | Elastic core shaft for grinding of outer piston |
| CN104190977A (en) * | 2014-07-29 | 2014-12-10 | 南通理工学院 | Cylindrical workpiece outer circle machining clamp and using method thereof |
| CN205888298U (en) * | 2016-08-09 | 2017-01-18 | 上海脉迪机电技术有限公司 | Servo valve barrel side's orifice wire -electrode cutting of ultrahigh precision location frock |
| CN107962458A (en) * | 2016-10-20 | 2018-04-27 | 北京实验工厂 | A kind of small burr on-line synchronous minimizing technology of valve core of servo valve working edge |
| CN209227043U (en) * | 2018-12-12 | 2019-08-09 | 绵阳云飞精工机械有限公司 | The fixture of alloy bushing |
| CN209533082U (en) * | 2018-11-30 | 2019-10-25 | 四川众友机械有限责任公司 | A kind of tooling being ground long axis top circle |
| CN110539221A (en) * | 2019-10-17 | 2019-12-06 | 北京第二机床厂有限公司 | Grinding synchronous deburring mechanism and method suitable for high-precision servo valve core |
| CN210848388U (en) * | 2019-10-11 | 2020-06-26 | 重庆太仓科技有限公司 | Pneumatic tensioning device |
| CN111618688A (en) * | 2020-06-09 | 2020-09-04 | 上海诺玛液压系统有限公司 | Servo valve core precision match grinding synchronous deburring tool |
-
2021
- 2021-04-22 CN CN202110438376.0A patent/CN113102953B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3543128A1 (en) * | 1984-12-21 | 1986-06-26 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | METHOD FOR PRODUCING A ONE-PIECE VALVE BUSHING FOR ROTARY VALVE |
| CN201511274U (en) * | 2009-10-16 | 2010-06-23 | 无锡市锡泵制造有限公司 | Excircle grinding tool for shaft sleeve |
| CN202985171U (en) * | 2013-01-18 | 2013-06-12 | 柳州迅捷汽车同步器有限公司 | Synchronizer gear sleeve shifting fork groove turning clamp |
| CN104162836A (en) * | 2013-05-17 | 2014-11-26 | 昆山江锦机械有限公司 | Elastic core shaft for grinding of outer piston |
| CN104096852A (en) * | 2014-06-23 | 2014-10-15 | 上海交通大学 | Optimization method for servo valve core working edge small burr online removal process system |
| CN104190977A (en) * | 2014-07-29 | 2014-12-10 | 南通理工学院 | Cylindrical workpiece outer circle machining clamp and using method thereof |
| CN205888298U (en) * | 2016-08-09 | 2017-01-18 | 上海脉迪机电技术有限公司 | Servo valve barrel side's orifice wire -electrode cutting of ultrahigh precision location frock |
| CN107962458A (en) * | 2016-10-20 | 2018-04-27 | 北京实验工厂 | A kind of small burr on-line synchronous minimizing technology of valve core of servo valve working edge |
| CN209533082U (en) * | 2018-11-30 | 2019-10-25 | 四川众友机械有限责任公司 | A kind of tooling being ground long axis top circle |
| CN209227043U (en) * | 2018-12-12 | 2019-08-09 | 绵阳云飞精工机械有限公司 | The fixture of alloy bushing |
| CN210848388U (en) * | 2019-10-11 | 2020-06-26 | 重庆太仓科技有限公司 | Pneumatic tensioning device |
| CN110539221A (en) * | 2019-10-17 | 2019-12-06 | 北京第二机床厂有限公司 | Grinding synchronous deburring mechanism and method suitable for high-precision servo valve core |
| CN111618688A (en) * | 2020-06-09 | 2020-09-04 | 上海诺玛液压系统有限公司 | Servo valve core precision match grinding synchronous deburring tool |
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