CN212044155U - Flexible clamp for abrasive flow - Google Patents
Flexible clamp for abrasive flow Download PDFInfo
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- CN212044155U CN212044155U CN201922405856.8U CN201922405856U CN212044155U CN 212044155 U CN212044155 U CN 212044155U CN 201922405856 U CN201922405856 U CN 201922405856U CN 212044155 U CN212044155 U CN 212044155U
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Abstract
The utility model discloses an abrasive flow flexible clamp, it includes: the cylinder comprises an upper end cover, a cylinder sleeve and a lower end cover; the cylinder sleeve is an annular cylinder, and an upper end cover and a lower end cover are respectively arranged at the upper end and the lower end of the cylinder sleeve; the part to be processed is positioned in the cylinder sleeve and arranged on the lower end cover, the upper end cover and the lower end cover are both provided with a through hole, the through hole on the lower end cover is communicated with the hole system to be processed on the part to be processed, when the part to be processed is processed by abrasive flow, abrasive is sent into the hole system to be processed of the part from the lower fluid abrasive cylinder through the through hole on the lower end cover, the abrasive flows out of the hole system to be processed and is led out to the upper fluid abrasive cylinder through the through hole on the upper end cover, and after the abrasive in the lower fluid abrasive cylinder runs out, the abrasive collected into the upper fluid abrasive cylinder is reversely guided and processed on the hole system to be processed, and the operation is repeated. The utility model discloses can extrude pump body inclined hole fast, get rid of the protruding fluff thorn of cross hole limit, improve pump body processingquality, satisfy the purpose that pump body cleanliness required.
Description
Technical Field
The utility model belongs to the technical field of high-pressure fuel feed pump processing, a flexible anchor clamps of abrasive flow is related to.
Background
The high-pressure common rail system is a brand new fuel injection system based on mechanical, hydraulic and electronic control. The high-pressure common rail system mainly comprises a high-pressure oil supply pump, a pressure accumulator (rail), an oil sprayer, an Electronic Control Unit (ECU) and various sensors, wherein the high-pressure common rail system does not adopt the pulsation oil supply principle of the traditional fuel oil injection system, a common rail pipe with larger volume is arranged between the high-pressure oil supply pump and the oil sprayer, the common rail pipe accumulates fuel oil output by the high-pressure oil supply pump, can stabilize pressure fluctuation and then conveys the fuel oil to each sprayer through a high-pressure oil pipe.
The high-pressure fuel supply pump is a key component in the high-pressure common rail system, is mainly used for pressurizing low-pressure fuel into high-pressure fuel, storing the high-pressure fuel in an oil rail to wait for an injection instruction of an ECU (electronic control unit), and is a pressure source of the high-pressure common rail system. The high-pressure oil supply pump body is a basic structural component of the high-pressure oil supply pump, and the precision and the performance of the high-pressure oil supply pump body directly influence the performance of the high-pressure oil supply pump. Therefore, the high-pressure oil supply pump has the index requirements of high precision (the precision of key dimension reaches IT4), high sealing property (no fuel leakage under 180MPa high pressure), high wear resistance (no abnormal wear caused by passing through 200h examination test kinematic pairs under 3200r/min high speed), high cleanliness (the granularity of surface residues is not more than 0.005mm) and the like on the high-pressure oil supply pump body.
The high-pressure oil supply pump body has more holes, a high-pressure oil passage hole, an oil return hole and a plunger hole, and has high required precision. The high-pressure oil channel hole is provided with a cross hole with a longer oil inlet channel and an oil return channel, and the surface quality of the cross hole influences the fluidity and the flow coefficient of the fuel oil of the pump body.
The types of burrs in the metal processing process mainly include flash burrs, sharp-angled burrs, splashing and the like which are redundant metal residual parts which do not meet the design requirements of products, and no effective method can be used for completely eradicating the burrs 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.
Aiming at the requirement of high cleanliness index on the particles of the residues on the surface of the fuel cavity of the high-pressure fuel supply pump body, which are not more than 0.005mm, the particles of the residues with the depth of the crossed deep hole of the fuel cavity, which is more than 0.005mm, are removed by using abrasive flow processing, so that the problem of cleanliness of the fuel cavity is solved. By analyzing the abrasive flow processing principle, the processing characteristics and the like, the method for exploring the burr removal rule of the fuel oil channel by using the parameters such as the abrasive flow abrasive material, medium, granularity, viscosity, pressure, speed and the like, optimizing related parameters, verifying that the abrasive flow processing technology can effectively remove the crossed deep hole burrs of the fuel oil channel, and providing high efficiency and convenience for the control of the cleanliness of the fuel oil channel of the high-pressure fuel feed pump.
As shown in figure 1, the fuel cavity inclined hole of the high-pressure fuel supply pump body is 2 multiplied by 4mm, the surface roughness is Ra1.6, and the hole opening is rounded. In the production process, the pump body inclined hole
Firstly, a guide hole is drilled by a horizontal machining center, then the guide hole is machined by a common drilling machine, and a high-speed steel drill bit is directly machined to the size required by a drawing. The process method has the characteristics of high productivity, small cutter loss, low requirement on the processing skill of an operator and the like, but the roughness of the inner surface of the processed hole can only reach Ra3.2, the drawing requirement Ra1.6 cannot be met, simultaneously, a plurality of micro burrs are left, and the drilling starting end and the drilling ending end and the drilling end have the advantages of low residual quantity of micro burrs
Sharp edges will be formed at the junction。
In actual production, hard contact is adopted in the method for processing the burrs of the inclined holes of the fuel oil cavity of the high-pressure fuel supply pump body in the factory. By using
And
the drill bit is used for manually cleaning sharp edges and residual burrs of the inclined hole of the valve seat, the method is strong in randomness, poor in cleaning effect and incapable of solving the problem of burrs.
According to the design requirements of products: inclined hole of fuel cavity of high-pressure fuel supply pump body
Rounding is required at the orifice exit. In actual production, the process adopts a self-made cutter to process the hole openings manually, and the included angles between the inclined holes of the pump body and the central line are 60 degrees 30 'and 64 degrees 30', and are positioned in
In the hole, the operator will cut the hole without paying attention to the hole
The wall of the hole is not cleanly processed.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
The utility model aims at: the utility model provides an abrasive flow flexible clamp, when realizing that abrasive flow cuts open the smooth machine tool processing pump body inclined hole, effectively carry out the abrasive flow to the pump body inclined hole and remove the burr, the protruding burr in the cross hole is got rid of in quick hydraulic extrusion.
(II) technical scheme
In order to solve the technical problem, the utility model provides an abrasive flow flexible clamp, it includes: the cylinder liner comprises an upper end cover 1, a cylinder sleeve 2 and a lower end cover 3; the cylinder sleeve 2 is an annular cylinder, and the upper end and the lower end of the cylinder sleeve are respectively provided with an upper end cover 1 and a lower end cover 3; the part to be processed is positioned in the cylinder sleeve 2 and is arranged on the lower end cover 3, the upper end cover 1 and the lower end cover 3 are both provided with a through hole, the through hole on the lower end cover 3 is communicated with the hole system to be processed on the part to be processed, when the part to be processed is subjected to abrasive flow processing, the abrasive is sent into the hole system to be processed of the part from the lower fluid abrasive cylinder through the through hole on the lower end cover 3, the abrasive is led out to the upper fluid abrasive cylinder through the through hole on the upper end cover 1 after flowing out from the hole system to be processed, and the abrasive collected into the upper fluid abrasive cylinder is reversely guided to process the hole system to be processed after flowing out of the abrasive in the lower fluid abrasive cylinder, so that the operation is repeated.
A first raised annular positioning table is formed on the lower surface of the upper end cover 1, a second raised annular positioning table is formed on the upper surface of the upper end cover, the outer diameter of the first annular positioning table is consistent with the inner diameter of the cylinder sleeve 2, the upper end of the cylinder sleeve 2 is sleeved on the first annular positioning table, and the second annular positioning table is connected with the upper fluid abrasive cylinder.
The upper surface of the lower end cover 3 is provided with a third annular positioning table, the lower surface of the lower end cover is provided with a fourth annular positioning table, the outer diameter of the third annular positioning table is consistent with the inner diameter of the cylinder sleeve 2, the lower end of the cylinder sleeve 2 is sleeved on the third annular positioning table, and the fourth annular positioning table is connected with the lower fluid abrasive cylinder.
Two positioning holes are further formed in the lower end cover 3 and aligned with threaded holes in the bottom face of the part to be machined, and two locking pins penetrate through the two groups of positioning holes and the threaded holes to achieve fixing and positioning of the part to be machined on the lower end cover 3.
Wherein, the upper and lower terminal surface of cylinder liner 2 is respectively provided with an annular groove, the groove is internally provided with a rubber seal ring, and the rubber seal ring is attached to the upper and lower end covers.
The material of the cylinder sleeve 2 is 40Gr, and the hardness is 28-33 HRC.
The upper end cover 1 is made of 40Gr materials, and the hardness is 28-33 HRC.
The lower end cover 3 is made of 40Gr materials, and the hardness is 28-33 HRC.
(III) advantageous effects
The abrasive flow flexible clamp provided by the technical scheme can quickly extrude the inclined hole of the pump body, remove the protruding burrs on the edge of the cross hole, improve the processing quality of the pump body, meet the performance index requirement of the pump body and meet the cleanliness requirement of the pump body; the part can be firmly fixed in the closed cavity, other parts which do not need to be processed by the grinding materials are protected, and the grinding materials are guided to flow at the accurate part of the pump body.
Drawings
Fig. 1-structural view of the inclined hole of the high-pressure oil supply pump body.
Fig. 2-abrasive flow machining schematic.
Figure 3-fuel channel orifice abrasive flow machining fixture schematic.
Fig. 4-upper end cap diagram.
FIG. 5-cylinder liner diagram.
Fig. 6-lower end cap diagram. The B picture is the central axial section of the A picture, and the C picture is the B-B direction view of the B picture.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following description will make a detailed description of embodiments of the present invention with reference to the accompanying drawings and examples.
As shown in fig. 3 to 6, the abrasive flow flexible jig of the present invention comprises: the cylinder liner comprises an upper end cover 1, a cylinder sleeve 2 and a lower end cover 3; the cylinder sleeve 2 is an annular cylinder, and the upper end and the lower end of the cylinder sleeve are respectively provided with an upper end cover 1 and a lower end cover 3; the part to be processed is positioned in the cylinder sleeve 2 and is arranged on the lower end cover 3, the upper end cover 1 and the lower end cover 3 are both provided with a through hole, the through hole on the lower end cover 3 is communicated with the hole system to be processed on the part to be processed, when the part to be processed is subjected to abrasive flow processing, the abrasive is sent into the hole system to be processed of the part from the lower fluid abrasive cylinder through the through hole on the lower end cover 3, the abrasive is led out to the upper fluid abrasive cylinder through the through hole on the upper end cover 1 after flowing out from the hole system to be processed, and the abrasive collected into the upper fluid abrasive cylinder is reversely guided to process the hole system to be processed after flowing out of the abrasive in the lower fluid abrasive cylinder, so that the operation is repeated.
A first raised annular positioning table is formed on the lower surface of the upper end cover 1, a second raised annular positioning table is formed on the upper surface of the upper end cover, the outer diameter of the first annular positioning table is consistent with the inner diameter of the cylinder sleeve 2, the upper end of the cylinder sleeve 2 is sleeved on the first annular positioning table, and the second annular positioning table is connected with the upper fluid abrasive cylinder.
The upper surface of the lower end cover 3 is provided with a third annular positioning table, the lower surface of the lower end cover 3 is provided with a fourth annular positioning table, the outer diameter of the third annular positioning table is consistent with the inner diameter of the cylinder sleeve 2, the lower end of the cylinder sleeve 2 is sleeved on the third annular positioning table, and the fourth annular positioning table is connected with the lower fluid abrasive cylinder.
Two positioning holes are further formed in the lower end cover 3 and aligned with the threaded holes in the bottom face of the part to be machined, and the two locking pins penetrate through the two groups of positioning holes and the threaded holes to fix and position the part to be machined on the lower end cover 3.
Annular grooves are respectively formed in the upper end face and the lower end face of the cylinder sleeve 2, rubber sealing rings are arranged in the grooves, and under the action of high pressure, the rubber sealing rings are tightly attached to the upper end cover and the lower end cover, so that abrasive materials are effectively prevented from flowing out.
The cylinder sleeve 2 can enable the grinding materials to flow up and down in a closed space, so that the upper fluid grinding material cylinder is communicated with the lower fluid grinding material cylinder.
And processing parameters of the cylinder sleeve 2: material 40 Gr; the hardness is 28-33 HRC; the machine tool is a numerically controlled lathe.
Processing parameters of the upper end cover 1: material 40 Gr; the hardness is 28-33 HRC; the machine tool is a numerically controlled lathe. The verticality phi 0.02 is selected for the left and right end surfaces of the part; the outer circles on the left and right end surfaces are coaxial phi 0.02.
Processing parameters of the lower end cover 3: material 40 Gr; the hardness is 28-33 HRC; the machine tool selects a numerical control lathe and a vertical machining center. The verticality phi 0.02 is selected for the left and right end surfaces of the part; the outer circles on the left and right end surfaces are coaxial phi 0.02; the coordinate size precision of the two threaded holes and the feeding hole is +/-0.1.
As shown in fig. 2, the hole system of the part is processed by abrasive flow based on the principle, a proper amount of abrasive is loaded into a lower fluid abrasive cylinder, and a clamp and a high-pressure oil supply pump body are loaded and then placed into a feed port of the lower fluid abrasive cylinder. The control panel inputs processing pressure and processing time, the working button is pressed, oil pressure is used as power, the upper fluid grinding cylinder extends out to press the upper end cover, the machine tool starts to extrude, grinding materials flow from the lower fluid grinding cylinder to the upper fluid grinding cylinder through the processing surface needed by the workpiece, then the grinding materials are pushed from the upper fluid grinding cylinder to enter the lower fluid grinding cylinder through the processing surface, and therefore the upper fluid grinding cylinder and the lower fluid grinding cylinder reciprocate up and down until cleaning is completed.
The following objects can be achieved by using the clamp:
1. the processing range is enlarged, and the use performance of the machine tool is increased: an introduced abrasive particle fluid polishing machine tool aims at improving the processing quality of an oil channel hole of an electric control monoblock pump, belongs to a special machine tool, and is only used for processing a pump body of the electric control monoblock pump by a clamp matched with the machine tool. The utility model discloses increased the range of processing of this lathe, the professional equipment function is reinforceed into multifunctional equipment.
2. Remove pump body burr, improve the quality in fuel oil cavity road hole: the clamp adopts a profiling design, utilizes the working principle and the clamping mode of the machine tool, guides the abrasive flow into the fuel cavity channel hole of the pump body, fully extrudes and grinds the liquid inlet and the hole wall of the fuel cavity channel hole, removes liquid inlet burrs, reduces the surface roughness of the hole wall, and removes adverse factors influencing the processing quality of the pump body.
3. The export of rapid radius inclined hole satisfies the product design requirement: the utility model discloses well guide pin bushing guides the accurate pump body inclined hole exit with liquid abrasive material, and the abrasive material grinds the extrusion drill way fast under the effect of high pressure, rounds the drill way. The phenomenon that the waste products are generated due to the orifice rounding process is prevented.
According to the above technical scheme, the utility model discloses the anchor clamps are selected to use the material wearability strong, and the installation is simple, and the manufacturing accuracy is low, has realized the accurate location of liquid abrasive material passageway, has improved the roughness in the oil duct hole of the high pressure fuel feed pump body, gets rid of pump body burr, improves the quality in burning oil chamber way hole, has ensured product quality, finally reaches the purpose that promotes product quality, makes the range of work of grit fluid polishing lathe increase.
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 (8)
1. An abrasive flow flexible fixture, comprising: the cylinder liner comprises an upper end cover (1), a cylinder liner (2) and a lower end cover (3); the cylinder sleeve (2) is an annular cylinder, and the upper end and the lower end of the cylinder sleeve are respectively provided with an upper end cover (1) and a lower end cover (3); the part to be processed is located in the cylinder sleeve (2) and arranged on the lower end cover (3), the upper end cover (1) and the lower end cover (3) are respectively provided with a through hole, the through hole on the lower end cover (3) is communicated with the hole system to be processed on the part to be processed, when the part to be processed is subjected to abrasive flow processing, abrasive is sent into the hole system to be processed of the part from the lower fluid abrasive cylinder through the through hole on the lower end cover (3), the abrasive is led out to the upper fluid abrasive cylinder through the through hole on the upper end cover (1) after flowing out from the hole system to be processed, the abrasive in the lower fluid abrasive cylinder is processed through reverse diversion of the abrasive collected into the upper fluid abrasive cylinder, and the processing is repeated in such a way.
2. The abrasive flow flexible clamp of claim 1, wherein a first raised annular positioning table is formed on the lower surface of the upper end cover (1), a second raised annular positioning table is formed on the upper surface, the outer diameter of the first annular positioning table is consistent with the inner diameter of the cylinder sleeve (2), the upper end of the cylinder sleeve (2) is sleeved on the first annular positioning table, and the second annular positioning table is connected with the upper fluid abrasive cylinder.
3. The abrasive flow flexible clamp according to claim 2, wherein a third annular positioning table is arranged on the upper surface of the lower end cover (3), a fourth annular positioning table is arranged on the lower surface of the lower end cover, the outer diameter of the third annular positioning table is consistent with the inner diameter of the cylinder sleeve (2), the lower end of the cylinder sleeve (2) is sleeved on the third annular positioning table, and the fourth annular positioning table is connected with the lower fluid abrasive cylinder.
4. The abrasive particle flow flexible clamp according to claim 3, wherein the lower end cover (3) is further provided with two positioning holes aligned with the threaded holes on the bottom surface of the part to be machined, and two locking pins penetrate through the two sets of positioning holes and the threaded holes to realize the fixation and positioning of the part to be machined on the lower end cover (3).
5. The abrasive flow flexible clamp according to claim 4, wherein the upper end surface and the lower end surface of the cylinder sleeve (2) are respectively provided with an annular groove, a rubber sealing ring is arranged in the groove, and the rubber sealing ring is attached to the upper end cover and the lower end cover.
6. The abrasive flow flexible clamp of claim 5, wherein the cylinder sleeve (2) is made of 40Gr material and has a hardness of 28-33 HRC.
7. The abrasive flow flexible clamp of claim 6, wherein the upper end cap (1) is made of 40Gr material and has a hardness of 28-33 HRC.
8. The abrasive flow flexible clamp of claim 7, wherein the lower end cap (3) material is 40Gr with a hardness of 28 to 33 HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922405856.8U CN212044155U (en) | 2019-12-27 | 2019-12-27 | Flexible clamp for abrasive flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922405856.8U CN212044155U (en) | 2019-12-27 | 2019-12-27 | Flexible clamp for abrasive flow |
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| Publication Number | Publication Date |
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| CN212044155U true CN212044155U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922405856.8U Active CN212044155U (en) | 2019-12-27 | 2019-12-27 | Flexible clamp for abrasive flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113251A (en) * | 2019-12-27 | 2020-05-08 | 国营第六一六厂 | Flexible clamp for abrasive flow |
| CN114734307A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Surface finishing method for micro inner flow passage with turning structure |
-
2019
- 2019-12-27 CN CN201922405856.8U patent/CN212044155U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113251A (en) * | 2019-12-27 | 2020-05-08 | 国营第六一六厂 | Flexible clamp for abrasive flow |
| CN114734307A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Surface finishing method for micro inner flow passage with turning structure |
| CN114734307B (en) * | 2022-06-13 | 2022-09-02 | 中国航发上海商用航空发动机制造有限责任公司 | Surface finishing method for micro inner flow passage with turning structure |
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