CN212635435U - Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps - Google Patents
Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps Download PDFInfo
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- CN212635435U CN212635435U CN201922457114.XU CN201922457114U CN212635435U CN 212635435 U CN212635435 U CN 212635435U CN 201922457114 U CN201922457114 U CN 201922457114U CN 212635435 U CN212635435 U CN 212635435U
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Abstract
The utility model discloses a precision fast hydraulic extrusion slide valve fine metering hole clamp, the positioning valve center is opened there is the mesopore, the mesopore bottom is the abrasive material outlet, the positioning valve upper end is provided with a plurality of slide valve processing grooves, its internal installation slide valve, slide valve processing groove equipartition is peripheral at the mesopore, the guide valve is arranged at the positioning valve top, set up seal gasket between guide valve and the positioning valve, the guide valve top center has seted up the pan feeding groove, still have seted up a plurality of stock guides on the guide valve, the stock guide slope arranges, lead to the slide valve fine metering hole by the pan feeding groove, set up the intercommunicating pore to the mesopore on the slide valve processing groove inner wall, the slide valve fine metering hole communicates with intercommunic; when the sliding valve micro-metering hole abrasive material is processed, the abrasive material enters from the feeding groove, flows to the material guide holes respectively, flows through the sliding valve micro-metering hole, then flows into the middle hole of the positioning valve, and flows out from the abrasive material outlet hole. The utility model discloses a liquid abrasive material passageway's accurate location has improved the micropore machining accuracy of slide valve, has ensured product quality.
Description
Technical Field
The utility model belongs to the technical field of machining, a fine metering hole anchor clamps of accurate quick hydraulic extrusion sliding valve is related to.
Background
The high-pressure common rail oil supply system has the typical characteristics of high power density, high universe maneuverability, high flow and ultrashort oil injection duration. The common rail fuel injector part electromagnetic valve in the system can not directly control the opening and closing of the needle valve matching part, the opening and closing of the needle valve are controlled through the slide valve matching part, and the response time of the slide valve matching part to the electromagnetic valve directly influences the performance of the common rail fuel injector, so the slide valve matching part is a key core part of the common rail fuel injector. The slide valve coupling part consists of a slide valve, a slide valve sleeve and a valve block shown in figure 1 and is mainly used for driving the needle valve coupling part to complete fuel injection under the driving of an electromagnetic valve according to an ECU instruction. The flow rate ratio of the inlet/outlet oil metering holes (hereinafter referred to as micropores) of the slide valve and the valve block determines the opening and closing speed of the needle valve, and poor consistency of the inlet/outlet oil flow rate ratio of the slide valve coupling part is one of the main influencing factors due to low processing precision of the micropores.
As shown in fig. 1, the phi 0.12 +/-0.005 mm micropore is arranged at the position of an outer column of the slide valve, which is 0.7 +/-0.02 mm away from the upper end surface, the surface roughness requires Ra0.5, and the burr removal is required at the interface hole with phi 0.6(+ 0.03/0). At present, two technologies of ultrasonic vibration high-speed drilling and electric spark punching are mainly adopted for machining the slide valve micropore phi 0.12 mm. The ultrasonic vibration high-speed drill bit is directly processed to the dimension required by a drawing, the process method has the characteristics of high productivity, small cutter loss, low requirement on processing skill of an operator and the like, but the roughness of the inner surface of a processed hole can only reach Ra1.6, the requirement on the drawing Ra0.5 cannot be met, meanwhile, more micro burrs are left, and a sharp edge is formed at the junction of the drilling tail end and the hole phi 0.6 mm; the electric spark machining of the micropores has the advantages of no mechanical machining force, high micropore precision, no burrs at orifices, no limitation of material hardness and the like, but the electro-corrosion surface roughness cannot reach the requirement Ra0.5 of a drawing, sharp edges can be formed at the joints of the machined micropores and the sealing conical surfaces, and the high-pressure oil drainage is intercepted; carbon deposition and water quality scars are easily formed in the holes. The existence of carbon deposition and water quality scars can influence the accuracy of micropore diameter and roundness measurement, and has adverse effects on the authenticity and accuracy of the flow rate ratio test of the oil inlet/outlet of the slide valve and the valve block.
The burr type in the metal processing process mainly comprises a protruding redundant metal residual part which does not meet the design requirement of a product, such as flash burr, sharp-angle burr, splash and the like, and no effective method can be used for completely eradicating the metal residual part in the production process. Generally, methods for deburring can be roughly classified into four types: the first type is hard contact: cutting and grinding the product, and processing a file and a scraper by using the existing cutter; the second type is soft touch: processing the parts by abrasive belt grinding, elastic grinding wheel grinding, polishing and the like; the third type is flexible contact: carrying out washing processing, electrochemical processing, electrolytic grinding, rolling processing and the like on the part; the fourth type is precision contact: and (3) performing abrasive flow deburring, magnetic grinding, electrolysis, heat energy and radium strong ultrasonic processing on the part and the like.
In actual production, the method for deburring the micropores of the slide valve adopts hard contact. The sharp edges and residual burrs of the micropores of the slide valve are manually cleaned by using the drill bit with the diameter of 0.6 mm, the surface precision of the walls of the micropores cannot be improved, meanwhile, the diameter of the hole with the diameter of 0.6 mm is small, an operator can hardly observe the hole, the burr removal randomness is high, and the cleaning effect is poor.
At present, special equipment and corresponding tools are needed to be purchased by adopting soft contact or flexible contact, so that the investment is large and the factory condition is inconsistent. The existing conditions are combined, a hydraulic grinding and extruding machine tool is adopted to machine the slide valve micropores, abrasive flow is carried out on the slide valve micropores to remove burrs, and rapid hydraulic extrusion is carried out to remove the protruding burrs of the micropores.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
The utility model aims at: the provided accurate and rapid hydraulic extrusion slide valve micropore clamp can rapidly extrude slide valve micropores, remove protruding burrs on the edge of the hole, improve the machining quality of the slide valve micropores, meet the requirement of slide valve surface roughness, finally meet the requirement of slide valve performance indexes, firmly fix a part in a machine tool configuration clamp, accurately guide abrasive materials to the part micropores, and protect other parts which do not need abrasive material machining.
(II) technical scheme
In order to solve the technical problem, the utility model provides a fine metering hole anchor clamps of accurate quick hydraulic extrusion slide valve, it includes: a positioning valve 1, a guide valve 4 and a sealing gasket 5. A center hole is formed in the center of the positioning valve 1, an abrasive material outflow hole is formed in the bottom of the center hole, a plurality of slide valve machining grooves are formed in the upper end of the positioning valve 1, slide valves are installed in the slide valves, the slide valve machining grooves are uniformly distributed on the periphery of the center hole, the guide valve 4 is arranged at the top of the positioning valve 1, a sealing gasket 5 is arranged between the guide valve 4 and the positioning valve 1, a feeding groove is formed in the center of the top of the guide valve 4, a plurality of guide holes are formed in the guide valve 4, the guide holes are obliquely arranged and communicated with the slide valve micro metering holes from the feeding groove, communicating holes communicated with the center hole are formed in the inner; when the slide valve micro-metering hole abrasive material is processed, the abrasive material enters from the feeding groove, flows to the material guide holes respectively, flows through the slide valve micro-metering hole, then flows into the middle hole of the positioning valve 1, and flows out from the abrasive material outlet hole.
Wherein, the bottom of each slide valve machining groove is provided with a positioning hole, the slide valve and the guide valve 4 are provided with positioning holes coaxial with the positioning holes, and the first positioning pin 2 penetrates through the positioning holes of the guide valve 4, the slide valve and the slide valve machining groove to limit the freedom degree of the slide valve clamping.
The guide valve 4 is further provided with a pin hole corresponding to the blind hole in the slide valve, and the second positioning pin 3 penetrates through the blind hole and the pin hole in the slide valve to limit the clamping freedom of the slide valve and simultaneously perform abrasive flow resistance.
Two first positioning pins 2 and one second positioning pin 3 are arranged corresponding to each slide valve, the first positioning pin 2 is a positioning pin with the diameter of phi 0.8 multiplied by 5.5, and the second positioning pin 3 is a positioning pin with the diameter of phi 1 multiplied by 8.5.
The upper end face of the guide valve 4 is a smooth surface, a rubber pad is arranged on the upper end face of the guide valve 4, and an abrasive pressing head is arranged above the rubber pad and used for introducing abrasive into the guide valve 4.
Wherein, the first positioning pin 2 is in clearance fit with the positioning valve 1.
Wherein the positioning valve 1 is made of Cr 15; the hardness is 58-62 HRC;
wherein the material of the guide valve 4 is: WEL-TEN AR360C low alloy wear resistant steel; the hardness HB is more than or equal to 235-401.
Wherein the sealing gasket 5 material H60; the elastic modulus E is (0.91 to 0.99) × 106。
Wherein, the upper end of the positioning valve 1 is provided with 5 slide valve processing grooves, and 5 slide valves are simultaneously arranged on the positioning valve 1.
(III) advantageous effects
The accurate quick hydraulic extrusion slide valve micropore anchor clamps that above-mentioned technical scheme provided choose for use the material wearability strong, and the installation is simple, and the manufacturing accuracy is high, and reasonable in design has realized the accurate location of liquid abrasive material passageway, has improved the micropore's of slide valve machining accuracy, has ensured product quality, solves the surface roughness problem of product micropore, finally reaches the purpose that promotes product quality, has increased the process range of hydraulic extrusion lathe, and the professional equipment function strengthens into multi-functional equipment.
Drawings
Figure 1 is a schematic view of a slide valve.
Fig. 2 is a schematic view of the clamp structure.
Fig. 3 is an enlarged view of the abrasive flow outlet.
Figure 4 is a simplified clamp assembly.
Fig. 5 is a schematic view of a positioning valve.
Fig. 6 is a schematic view of a pilot valve.
FIG. 7 schematic view of a gasket seal.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings and examples.
Referring to FIG. 4: the utility model discloses anchor clamps include: a positioning valve 1, a guide valve 4 and a sealing gasket 5. A center hole is formed in the center of the positioning valve 1, an abrasive material outflow hole is formed in the bottom of the center hole, a plurality of slide valve machining grooves are formed in the upper end of the positioning valve 1, slide valves are installed in the slide valves, the slide valve machining grooves are uniformly distributed on the periphery of the center hole, the guide valve 4 is arranged at the top of the positioning valve 1, a sealing gasket 5 is arranged between the guide valve 4 and the positioning valve 1, a feeding groove is formed in the center of the top of the guide valve 4, a plurality of guide holes are formed in the guide valve 4, the guide holes are obliquely arranged and communicated with the slide valve micro metering holes from the feeding groove, communicating holes communicated with the center hole are formed in the inner; when the slide valve micro-metering hole abrasive material is processed, the abrasive material enters from the feeding groove, flows to the material guide holes respectively, flows through the slide valve micro-metering hole, then flows into the middle hole of the positioning valve 1, and flows out from the abrasive material outlet hole.
The bottom of each slide valve machining groove is provided with a positioning hole, positioning holes coaxial with the positioning holes are formed in the slide valve and the guide valve 4, and the first positioning pin 2 penetrates through the positioning holes of the guide valve 4, the slide valve and the slide valve machining groove to limit the clamping freedom degree of the slide valve.
The guide valve 4 is also provided with a pin hole corresponding to the blind hole on the slide valve, and the second positioning pin 3 penetrates through the blind hole and the pin hole of the slide valve to limit the clamping freedom degree of the slide valve and simultaneously perform abrasive flow resistance.
The first positioning pin 2 is two positioning pins with the diameter of 0.8 multiplied by 5.5, and the second positioning pin 3 is one positioning pin with the diameter of 1 multiplied by 8.5.
The guide valve 4 plays the sealed spool valve up end effect that compresses tightly, and first locating pin 2, second locating pin 3 play the restriction spool valve and process the degree of freedom effect, and the locating valve 1 is fixed a position the terminal surface under the spool valve to carry out the pressure release to the abrasive material. Meanwhile, the upper end face of the guide valve 4 is a smooth surface, the surface roughness is Ra0.05, a rubber pad is arranged on the upper end face of the guide valve 4, an abrasive pressing head is arranged above the rubber pad, the upper end face of the guide valve 4 can be tightly attached to the rubber pad under high pressure, shearing force and abrasive abrasion cannot occur, and abrasive overflow and working pressure reduction are prevented. The lower end face of the guide valve 4 is tightly attached to the sealing gasket 5, so that the sharp edge of the special-shaped sealing surface is prevented from being damaged due to pressure increase. The first positioning pin 2 and the positioning valve 1 are in precise clearance fit. The second positioning pin 3 plays a role in flow resistance on the abrasive, and the positioning valve 1 plays a role in positioning the lower end face of the slide valve. The positioning valve 1 and the guide valve 4 are matched with a clamping slide valve, so that the flow direction of abrasive flow can be accurately guided.
Machining precision parameters of the positioning valve 1: the material Cr 15; the hardness is 58-62 HRC; the machining tool selects a turning center, a vertical machining center, a high-precision numerical control surface grinding machine and a high-precision outer circle grinding machine; the parallelism of the upper end face of the part is 0.01, the planeness is 0.009, the surface roughness is 0.2, the verticality of the inner end face of the phi 5.5 hole is phi 0.01, and the surface roughness is 0.8.
Machining precision parameters of the guide valve 4: materials: WEL-TEN AR360C low alloy wear resistant steel; the hardness HB is more than or equal to 235-401; the machining tool selects a turning center, a vertical machining center, a high-precision numerical control surface grinding machine and an electric spark punching machine; the parallelism of the end face of the part is 0.01, the planeness is 0.009, and the surface roughness is 0.05; the verticality of phi 1 hole and phi 0.8 hole is 0.01.
The processing precision parameters of the sealing gasket 5 are as follows: material H60; the processing machine tool selects a vertical drilling machine. The elastic modulus E of the material is (0.91-0.99) × 106Much smaller than the modulus of elasticity of the spool valve. The clamp can clamp 5 sliding valves at one time, adopts non-ferrous metal sealing, and can eliminate the situation that the total length of the 5 sliding valves in the clamp is different by utilizing the natural elastic characteristic.
As shown in fig. 2 and 3, the jig is set with 5 slide valves and then placed in the base. The control panel inputs the processing pressure, the processing time and the extrusion times (the total amount of the grinding materials), the working button is pressed, and the machine tool starts to extrude. The grinding material is pressurized by a hydraulic pump of the machine tool and flows out of the pressure head, enters the phi 0.6 hole of the slide valve through the phi 1 hole of the guide valve, the phi 1 positioning pin prevents the liquid grinding material from flowing into the phi 1 hole, and the grinding material enters the middle hole of the positioning valve after rapidly and accurately extruding and grinding the micropore outlet and the hole wall of the slide valve and flows out of the phi 0.8 hole of the positioning valve.
In this anchor clamps, the positioning valve up end is smooth, closely laminates with rubber packing under high pressure, prevents the seepage of liquid abrasive material, improves the leakproofness, realizes the characteristics of accurate location. The lower end face of the positioning valve is tightly attached to the sealing gasket under high pressure, and the end face of the sealing gasket is tightly attached to the special-shaped sealing face at the upper end of the sliding valve, so that the sharp edge of the special-shaped sealing face is prevented from being broken due to pressure increase.
In the clamp, the guide valve has high requirements on wear resistance and impact load, and the material is low-alloy wear-resistant steel WEL-TEN AR 360C; the hardness HB is more than or equal to 235-401. The alloy material is known for high toughness and high hardness and toughness. Under the abrasion working condition of certain impact load, the service life of the wear-resistant cast iron is longer than that of the wear-resistant cast iron.
In the fixture, a phi 1 positioning pin and a phi 0.8 positioning pin are adopted to limit the clamping freedom degree of the slide valve, and the phi 1 positioning pin is used for carrying out abrasive flow blocking, so that the fixture is reasonable in design and simple to machine.
The fixture can clamp 5 sliding valves, has strong practicability, improves the utilization rate of the machine tool, and strengthens the performance of the machine tool.
In the clamp, the positioning valve is designed in a copying manner, the machine tool is configured by the positioning valve to a great extent, the capital is saved, the structure is simple, and the replacement is rapid. The slide valve micropore is extruded and ground once, and the time is only 30 seconds.
According to the above technical scheme, the utility model has the following characteristics of showing:
1. the processing range is enlarged, and the use performance of the machine tool is increased: the aim of introducing a hydraulic grinding and extruding machine tool is to improve the processing quality of the needle valve body micropore, homogenize the micropore flow coefficient of a part and finally achieve the performance indexes of stable flow coefficient and good atomization effect of a needle valve coupling piece in the injection process. At present, manufacturers at home and abroad adopt the machine tool to carry out hydraulic grinding and extrusion processing only on the spray hole of the needle valve body, the machine tool belongs to a special machine tool, and a clamp matched with the machine tool only processes the needle valve body. The utility model discloses increased the range of processing of this lathe, the professional equipment function is reinforceed into multifunctional equipment.
2. The burr of the slide valve is removed, and the quality of the micro-hole is improved: the original clamp only acts on the spray orifice of the needle valve body, the clamp adopts a profiling design, and utilizes a unique clamping mode of the machine tool to guide abrasive flow into the slide valve micropore, remove burrs of the inner orifice of the micropore and fully extrude and grind the pore wall, remove the burrs, reduce the surface roughness of the pore wall, and remove adverse factors influencing the processing quality of the slide valve micropore.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a fine metering hole anchor clamps of accurate quick hydraulic extrusion slide valve which characterized in that includes: the device comprises a positioning valve (1), a guide valve (4) and a sealing gasket (5); a center hole is formed in the center of the positioning valve (1), an abrasive material outflow hole is formed in the bottom of the center hole, a plurality of slide valve machining grooves are formed in the upper end of the positioning valve (1), slide valves are installed in the slide valve machining grooves, the slide valve machining grooves are uniformly distributed on the periphery of the center hole, the guide valve (4) is arranged at the top of the positioning valve (1), a sealing gasket (5) is arranged between the guide valve (4) and the positioning valve (1), a feeding groove is formed in the center of the top of the guide valve (4), a plurality of guide holes are formed in the guide valve (4), the guide holes are obliquely arranged and communicated with the slide valve micro metering holes from the feeding groove, communicating holes communicated with the center hole are formed in the inner wall of; when the slide valve micro-metering hole abrasive material is processed, the abrasive material enters from the feeding groove, flows to the material guide holes respectively, flows through the slide valve micro-metering hole, then flows into the middle hole of the positioning valve (1), and flows out through the abrasive material outlet hole.
2. The fine metering hole clamp for the precise and rapid hydraulic extrusion sliding valve according to claim 1, wherein a positioning hole is formed at the bottom of each sliding valve machining groove, positioning holes coaxial with the positioning holes are formed in the sliding valve and the guide valve (4), and the first positioning pin (2) penetrates through the positioning holes of the guide valve (4), the sliding valve and the sliding valve machining groove to limit the freedom degree of clamping of the sliding valve.
3. The clamp for the precise and rapid hydraulic extrusion sliding valve fine metering hole as recited in claim 2, wherein the guide valve (4) is further provided with a pin hole corresponding to the blind hole on the sliding valve, and the second positioning pin (3) passes through the blind hole and the pin hole of the sliding valve to limit the clamping freedom of the sliding valve and simultaneously perform abrasive flow blocking.
4. A precision rapid hydraulic extrusion slide valve micro-metering hole clamp according to claim 3, characterized in that two first positioning pins (2) and one for each slide valve are providedA second positioning pin (3), the first positioning pin (2) is
A second positioning pin (3) is
And a positioning pin.
5. The fine metering hole clamp for the precise and rapid hydraulic extrusion sliding valve according to claim 4, wherein the upper end surface of the guide valve (4) is a smooth surface, a rubber pad is arranged on the upper end surface of the guide valve (4), and an abrasive head is arranged above the rubber pad and used for introducing the abrasive to the guide valve (4).
6. The precision fast hydraulic extrusion slide valve micro metering hole clamp according to claim 5, wherein the first positioning pin (2) is clearance fitted with the positioning valve (1).
7. The fine metering hole clamp of a precision fast hydraulic extrusion slide valve according to claim 1, characterized in that the positioning valve (1) material Cr 15; the hardness is 58-62 HRC.
8. The precision rapid hydraulic extrusion slide valve micro metering orifice fixture as claimed in claim 1, wherein the pilot valve (4) material: WEL-TEN AR360C low alloy wear resistant steel; the hardness HB is more than or equal to 235-401.
9. The fine metering hole clamp of a precision rapid hydraulic extrusion slide valve according to claim 1, characterized in that the material H60; the elastic modulus E is (0.91 to 0.99) × 106。
10. The fine metering hole clamp of the precise and rapid hydraulic extrusion sliding valve according to claim 1, characterized in that 5 sliding valve machining grooves are arranged at the upper end of the positioning valve (1), and 5 sliding valves are simultaneously installed on the positioning valve (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922457114.XU CN212635435U (en) | 2019-12-30 | 2019-12-30 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
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| CN201922457114.XU CN212635435U (en) | 2019-12-30 | 2019-12-30 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977787A (en) * | 2019-12-30 | 2020-04-10 | 国营第六一六厂 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977787A (en) * | 2019-12-30 | 2020-04-10 | 国营第六一六厂 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
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