CN217194454U - Special finishing grinder for spherical surface machining of plunger - Google Patents
Special finishing grinder for spherical surface machining of plunger Download PDFInfo
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- CN217194454U CN217194454U CN202221123916.2U CN202221123916U CN217194454U CN 217194454 U CN217194454 U CN 217194454U CN 202221123916 U CN202221123916 U CN 202221123916U CN 217194454 U CN217194454 U CN 217194454U
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Abstract
A finishing grinder special for spherical surface machining of a plunger relates to the technical field of machining. Comprises a rotary seat group and a double-roller transmission group; the radial ball bearing is arranged in a rotary base shaft hole, one end of the rotary table mounting bearing is inserted into an inner ring hole of the radial ball bearing along one side of an outer end cover of the rotary base shaft, and an inner end cover of the rotary table shaft is arranged at the other end of the rotary base to lock the inner ring of the bearing and the rotary table shaft; the main idler wheel and the auxiliary idler wheel are installed in the idler wheel seat, the auxiliary synchronizing wheels are installed at the rear ends of shaft levers of the main idler wheel and the auxiliary idler wheel and are connected with the main synchronizing wheel of a motor shaft through the synchronizing belt, the ejector pin used for axially positioning a product is installed at the rear end of the ejector pin frame, a pinch roller spring and a pinch roller handle are installed in the pinch roller seat, and a pinch roller used for radially positioning the product is installed at the front end of the pinch roller handle. The utility model discloses can satisfy the use precision of plunger, reduce the processing cost of plunger simultaneously by a wide margin, productivity gain is applicable to the production and processing of the product that has this technical requirement, and then makes the product have more competitiveness in the market.
Description
Technical Field
The utility model relates to a machinery processing technology field, in particular to mill is maintained in special use of sphere processing of plunger.
Background
The plunger type fuel injection pump is the most important part in the diesel fuel supply system, and the performance and the quality of the plunger type fuel injection pump greatly influence the diesel engine, which is called the heart of the diesel engine. The plunger is the core component of the fuel injection pump and is mainly used for controlling the oil pressure and the fuel injection quantity, the surface profile error of the spherical surface of the head of the plunger directly influences the fine degree of fuel injection, and the surface profile degree of the spherical surface is required to be within 0.002 mm. The contour degree of a numerical control lathing surface of the spherical surface processing technology of the head part of the plunger does not meet the requirement, and the qualified rate is low. The arc center of the grinding wheel does not coincide with the spherical center of the spherical surface of the plunger piston in the conventional grinding machine, so that the grinding machining is difficult.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving present numerical control lathe processing sphere finish and face profile degree quality problem, provide a special mill of repairing of sphere processing of plunger, can realize the sphere body processing of plunger to processing sphere on the excircle grinding machine, processing out can satisfy the plunger of product technical requirement. The grinding wheel dressing range of the special dressing grinder is R85-125mm, and the product clamping range is phi 5-phi 12 mm. Can realize the sphere processing of plunger, through the size of adjusting the thimble on the thimble seat apart from the distance control R who revolves platform center, clamping convenient and fast, the good location accuracy of stability.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a special finishing grinder for a plunger spherical surface processing method is characterized in that: comprises a rotary base group and a double-roller transmission group mechanism arranged on the upper part of the rotary base group;
the swivel base set includes: the radial ball bearing is arranged in a rotary base shaft hole, the rotary base shaft inner bushing and the rotary base shaft outer bushing are arranged in the middle of the radial ball bearing, one end of the rotary base mounting bearing is inserted into an inner annular hole of the radial ball bearing along one side of the rotary base shaft outer end cover, and the rotary base shaft inner end cover is arranged at the other end of the rotary base to lock a bearing inner ring and a rotary base shaft;
the double-roller transmission set comprises: the roller seat, the main roller, the auxiliary roller, the motor seat, the pinch roller handle, the pinch roller spring, the main synchronizing wheel, the auxiliary synchronizing wheel, the synchronous belt, the thimble frame, the thimble, the motor, the positioning pin, the sand frame, the bearing and the pinch roller, the main roller and the auxiliary roller are arranged in the roller seat, the auxiliary synchronizing wheel is arranged at the rear end of the shaft lever of the main roller and the auxiliary roller and is connected with the main synchronizing wheel of the motor shaft through the synchronous belt, the motor rotates to drive the main roller and the auxiliary roller to rotate, the roller seat and the motor seat are positioned and arranged on the rotary table through the positioning pin, the motor and the roller rotate along with the rotation of the rotary table when the rotary table rotates, the thimble frame is arranged above the roller seat, the thimble for axially positioning the product is arranged at the rear end of the thimble frame, the pinch roller seat is arranged at the front end of the roller seat, the pinch roller spring and the pinch roller handle are arranged in the pinch roller seat, the pinch roller for radially positioning the product is arranged at the front end of the pinch roller handle, the pressing force is controlled by a pressing wheel spring.
The vertical shaft of the rotary table is perpendicular to the horizontal plane and is arranged in the rotary seat, the table surface of the rotary table rotates along the horizontal plane, and the outer diameter of the rotary table is provided with a rotary table handle.
The outer ring of the radial ball bearing is fixedly pressed through the outer end cover of the rotary base shaft, the radial ball bearing is locked in the rotary base shaft hole, a dustproof sealing ring is installed in an inner hole of the outer end cover of the rotary base shaft, and the other sealing ring is installed at the opposite end.
The outer end cover of the rotary base shaft is sleeved with a rotary table gasket coated with lubricating oil, the rotary table gasket controls the axial movement of the rotary table to ensure the axial stability, and meanwhile, the bearing controls the radial runout precision of the rotary table.
The main roller and the auxiliary roller are provided with shaft rods, bearings and a grinding frame are mounted on the shaft rods, the grinding frame rotates in the roller seat, the main roller and the auxiliary roller are used for positioning diamond pens or products during grinding wheel finishing or product processing, when the products are processed, a motor switch is started to drive the products to rotate to process the spherical surfaces of the products, the diamond pens are mounted on the rollers during grinding wheel finishing, then a rotary table handle is manually moved, and the grinding wheel circular arc, namely the size value of the spherical circular arc, can be finished through rotation of the rotary table.
The symmetrical center lines of the shaft holes of the main roller and the auxiliary roller on the roller seat are intersected with the central axis of the rotary table shaft to form an included angle of 90 degrees, namely, the shafts of the main roller and the auxiliary roller are vertical to a vertical plane, the center lines of the two rollers, namely, the axes of a product are vertical to the vertical plane and are intersected with the axis of the rotary table at the same time, and the two shafts are intersected, namely, a sphere is positioned at the circle center of a Z shaft and the circle center of a Y shaft, and the two shafts rotate to complete the processing of the sphere.
The grinding wheel dressing range of the special dressing grinder is R85-125mm, and the product clamping range is phi 5-phi 12 mm.
The utility model discloses a special finishing mill for processing sphere of plunger has following beneficial effect:
the utility model discloses the special mill of repairing of plunger sphere processing realizes the product processing that product length and diameter are different through the fore-and-aft distance of adjusting the thimble seat height and thimble from top to bottom, also is the R size value of repairing emery wheel adjustment buddha's warrior attendant pen fore-and-aft distance control and repairing the emery wheel simultaneously, and product or diamond pen pass through pinch roller handle quick clamping and dismantlement, and very convenient and fast, stability is good, the utility model discloses a mill design is exquisite to the special mill of repairing of plunger sphere, simple structure, convenient operation, the practicality is strong, can improve machining efficiency more than 30%, when the special mill of repairing appears the error, easily fragile part is changed, the cost low grade to machining capacity and market share have been improved.
Drawings
Fig. 1 is a structural diagram of the special finishing grinder of the present invention.
Fig. 2 is a structural view of the swivel group of fig. 1.
Fig. 3 is a block diagram of the dual roller drive train of fig. 1.
Fig. 4 is a right side view of fig. 3.
Fig. 5 is a top view of fig. 3.
FIG. 6 is a top view of the mounted pen sharpener of FIG. 3.
FIG. 7 is a front view of the mounted fountain pen wheel dresser of FIG. 3.
Fig. 8 is a front view of the installation plunger process of fig. 3.
Fig. 9 is a plan view one of the plunger.
Fig. 10 is a second plan view of the plunger.
In the figure: the automatic rotary table comprises a rotary table 1, a rotary table 2, a rotary table 3, an outer end cover of a rotary table shaft, a rotary table 4, an inner bushing of a rotary table shaft 5, a rotary table liner 6, a rotary table shaft inner end cover 7, a rotary table 8 positioning block 9, a rotary table locking block 10, a steering bottom plate 10, a rotary table handle 11, a roller seat 12, a main roller 13, an auxiliary roller 14, a motor seat 15, a pinch roller seat 16, a pinch roller handle 17, a pinch roller spring 18, a main synchronizing wheel 19, an auxiliary synchronizing wheel 20, a synchronous belt 21, a thimble frame 22, a thimble 23, a motor 24, a positioning pin 25, a sand frame 26, a bearing 27, a radial ball bearing 28 and a pinch roller 29.
H-outer diameter, I-transition angle, K-lead angle, Φ G-ball cut circle, J-outer diameter, N-connection angle, U-lead-in angle, P-lead-in angle length, SR-sphere, T-table length, F-clearance groove length, Φ D-shaft diameter, L-plunger length, Φ E-clearance groove diameter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples, but the present invention is not limited to the specific examples.
Example 1
As shown in fig. 1: a special finishing grinder for a plunger spherical surface processing method comprises a mechanism consisting of a rotary seat group and a double-roller transmission group:
the structure of the rotary seat group is as shown in fig. 2, a pair of radial ball bearings 28 are arranged in the shaft hole of the rotary seat 1, the rotary seat shaft inner bushing 4 and the rotary seat shaft outer bushing 5 are arranged in the middle of the bearings, then the bearing outer ring is tightly fixed by the rotary seat shaft outer end cover 3, the dustproof sealing ring is arranged in the inner hole of the rotary seat shaft outer end cover, and the other sealing ring is arranged at the other end hole of the rotary seat. After lubricating oil is coated on the rotary table gasket 6, the rotary table gasket is sleeved on the outer end cover of the rotary base, one end of the rotary table 2 shaft is inserted into the inner ring hole of the bearing along one side of the outer end cover of the rotary base shaft, and then the inner end cover 7 of the rotary table shaft is arranged at the other end of the rotary base to lock the inner ring of the bearing and the rotary table shaft. The rotary table gasket controls the axial movement of the rotary table to ensure the axial stability, and the bearing controls the radial runout precision. The rotary table handle 11 is arranged on the outer diameter of the rotary table disc to rotate the rotary table. The front end of the rotary seat 1 is installed on the rotary seat positioning block 8, the rear end of the rotary seat is installed on the rotary seat locking block 9, the rotary seat positioning block is used for positioning the rotary seat on the machine tool workbench, and the rotary seat is locked through the rotary seat locking block. When the special finishing grinder is adjusted from the cylindrical grinder to the surface grinder for use, the rotary base locking block 9 is detached and the upper steering base plate 10 is replaced, and then the special finishing grinder can be used on the surface grinder.
The structure of the double-roller transmission set is shown in fig. 3, 4 and 5, a main roller 13 and an auxiliary roller 14 are installed in a roller seat 12, shaft rods of the main roller 13 and the auxiliary roller 14 are both provided with bearings 27 and sand racks 26 to rotate in the roller seat, an auxiliary synchronizing wheel 20 is installed at the rear ends of the shaft rods of the main roller and the auxiliary roller and connected with a main synchronizing wheel 19 of a motor shaft through a synchronous belt 21, and a motor 24 rotates to drive the main roller and the auxiliary roller to rotate. The roller seat 12 is positioned and installed on the rotary table 2 through a positioning pin 25, and the motor seat 15 is also positioned and installed on the rotary table 2 through the positioning pin 25, and the motor 24 and the roller seat assembly rotate along with the rotation of the rotary table 2. An ejector pin frame 22 is arranged above the roller seat 12, an ejector pin 23 is arranged at the rear end of the ejector pin frame 22, when a product or a diamond pen is clamped on the main roller and the auxiliary roller, the product is radially positioned after being pressed by a pressing wheel 29, and the ejector pin 23 is pushed on the rear end face of the product to achieve axial positioning. The front end of the roller seat 12 is arranged on the pressing wheel seat 16, the pressing wheel spring 18 and the pressing wheel handle 17 are arranged in the pressing wheel seat 16, the pressing wheel 29 is arranged on the front end of the pressing wheel handle 18, when a product is clamped on the main roller and the auxiliary roller, the pressing wheel 29 is pressed tightly, and the pressing force is controlled by the pressing wheel spring 18. The main roller and the auxiliary roller are used for positioning a product and driving the product to rotate when the product is processed, and when the product is processed, the motor switch is started to drive the product to rotate so as to process the spherical surface of the product into the spherical surface as shown in fig. 8.
As shown in fig. 6 and 7, when dressing the grinding wheel, the diamond pen is mounted on the roller, and then the rotary table handle 11 is manually moved, and the rotary table is rotated to dress the size value of the grinding wheel arc, i.e. the spherical arc.
The axis of the rotary table 2 is perpendicular to the horizontal plane and is arranged in the rotary base 1, and the table surface of the rotary table 2 rotates along the horizontal plane.
The symmetrical central lines of the main and auxiliary roller mounting shaft holes on the roller seat 12 intersect with the central axis of the rotary table shaft at an included angle of 90 degrees, namely, the shafts of the main and auxiliary rollers are vertical to the vertical plane, and the central lines of the two rollers, namely, the product axis is vertical to the vertical plane and intersects with the rotary table axis at the same time. The two shafts are intersected, namely the sphere is positioned at the centers of the Z shaft and the Y shaft, and the two shafts rotate to complete the processing of the sphere. And the left and right positioning of the workbench during grinding wheel dressing and product processing, namely the position of the special dressing grinder on the X axis.
The utility model discloses the use simple to operate of the special use of plunger sphere grinds the seat soon and installs on the lathe workstation after alright process the use, and the adjustment thimble frame is upper and lower and the fore-and-aft distance of thimble can realize that the emery wheel dressing scope is R85-125mm, product clamping scope phi 5~ phi 12 mm. The product or the golden pen passes through the quick clamping of pinch roller handle and dismantles very convenient and fast, and stability is good, the utility model discloses a grinder is maintained in the special use of plunger sphere design exquisiteness, simple structure, convenient operation, the practicality is strong, can improve machining efficiency more than 30%, when the special grinder that maintains the error appears, easily damaged part changes, and the cost is low etc to processing capacity and market share have been improved.
Example 2
The processing object of the present embodiment is a plunger, and the structure of each part to be processed is shown in fig. 9 and 10.
A method for machining the spherical surface of plunger includes such steps as machining the plunger to become a shaft rod structure with hanging table, machining the shaft rod to become the empty slot on the internal end surface of hanging table, machining the external end surface of hanging table by the shaft rod, and machining the spherical surface of plunger hanging table by grinder. The method specifically comprises the following steps:
s1: a centerless grinder processing shaft lever comprises the following specific steps:
1) a shaft rod of the plunger piston supports a workpiece through a supporting plate of a centerless grinder, a guide wheel drives the workpiece to rotate a grinding wheel to grind, and the phi D value of the shaft rod is processed, wherein the tolerance is controlled within 0.003mm, and the roundness and the straightness are controlled within 0.001;
s2: the small lathe is used for processing the inner end surface and the clearance groove of the hanging table and processing the thickness and the total length of the hanging table through flat grinding, and the method comprises the following specific steps:
1) taking the shaft lever diameter phi D of the plunger as a reference, clamping the reference shaft by using an elastic chuck of a small lathe, and processing the inner end surface of the length T of the hanging platform within 0.01mm of perpendicularity tolerance; and then the diameter phi E of the clearance groove, the length F of the clearance groove and the connecting angle N are processed into the clearance groove.
2) Positioning and clamping on a plane grinding machine by using a reference shaft lever, processing the outer end face of the long T of the hanging table to ensure the tolerance of minus 0+0.01mm, then clamping by using a third shaft lever as the reference, and processing the right end face to ensure the dimensional tolerance of the long L value of the plunger to be processed with the difference and the length to be unified within 0.01 mm;
s3: the numerical control lathe processing hanging table outer end angle dimension value and small lathe processing lead-in angle U degree and lead-in angle length P value, the concrete steps are:
1) and (3) clamping by using the numerical control vehicle with the shaft lever diameter phi D of the plunger as a reference, machining an outer end angle transition angle I of the long T of the hanging platform, a guide angle K and an outer diameter J value, and ensuring that the surface roughness Ra0.3 is within the range.
2) An elastic chuck of a small lathe clamps the shaft diameter phi D of a reference shaft, a leading-in angle U degree and a leading-in angle P value at the right end of a processing shaft rod,
s4: the method comprises the following steps of machining an outer end surface spherical surface SR of a hanging table length T by a cylindrical grinding machine, and specifically comprises the following steps:
1) the special trimming grinder is mounted on a tool table of the cylindrical grinding machine, then the diamond pen is mounted on a double-roller pressing wheel of the special trimming grinder and is pressed tightly, the distance between the ejector pin on the ejector pin base and the rear end of the diamond pen is adjusted to control the diameter of the diamond pen, namely the size of the spherical surface SR, then the rotary table is rotated to perform circular arc trimming on the grinding wheel, and the diamond pen is taken down after the grinding wheel is trimmed.
2) Installing a plunger shaft on a double-roller upper pressing wheel of a special finishing grinder, pressing tightly the plunger shaft, starting a motor of the double-roller, rotating a roller wheel, starting the rapid introduction of transverse feeding of a machine tool, longitudinally moving a workbench to a position when a grinding wheel is finished, and then manually and transversely feeding to grind a spherical surface to a size value. Generally, the single-piece processing beat time is 10 to 15 seconds to finish the processing of one product. Therefore, the clamping is convenient, quick and flexible, and the positioning precision is high.
3) Selecting the granularity of the grinding wheel, wherein a proper grinding wheel is selected before RS processing according to the material, hardness and finish requirements of a product, and the granularity of the grinding wheel is 240-320 within the finish Ra0.1 in general. The finish requirement Ra0.2 is within 120- "180" of the grinding wheel grain size. The fineness requirement of the grinding wheel with the granularity of 60-100 is above Ra0.4.
The utility model discloses the process of a series of manufacturing procedure is accomplished to the sphere of plunger on special finishing mill, and the sphere size of the sphere processing of plunger can be adjusted, and the adjustment range is R85~125mm, and the emery wheel scope of finishing is also R85~125mm simultaneously, that is to say how big R is maintained to the emery wheel, just can process how big sphere. The grinding wheels with different grain sizes are selected according to the finish requirement of the product, and the finish can be controlled within Ra0.1. Adopt utility model's processing method can satisfy the processing and the use precision of plunger, reduces the cost of plunger sphere processing simultaneously, improves production efficiency, is applicable to the production and processing of the product that has this technique, and then makes the product more competitive in the market.
The above description is further detailed in connection with the preferred embodiments of the present invention, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses a under the prerequisite of the design, can also make simple deduction and replacement, all should regard as the utility model discloses a protection scope.
Claims (7)
1. The utility model provides a mill is maintained in special use of sphere processing of plunger which characterized in that: comprises a rotary base group and a double-roller transmission group mechanism arranged on the upper part of the rotary base group;
the swivel base set includes: the radial ball bearing is arranged in a rotary base shaft hole, the rotary base shaft inner bushing and the rotary base shaft outer bushing are arranged in the middle of the radial ball bearing, one end of the rotary base mounting bearing is inserted into an inner annular hole of the radial ball bearing along one side of the rotary base shaft outer end cover, and the rotary base shaft inner end cover is arranged at the other end of the rotary base to lock a bearing inner ring and a rotary base shaft;
the double-roller transmission set comprises: the roller seat, the main roller, the auxiliary roller, the motor seat, the pinch roller handle, the pinch roller spring, the main synchronizing wheel, the auxiliary synchronizing wheel, the synchronous belt, the thimble frame, the thimble, the motor, the positioning pin, the sand frame, the bearing and the pinch roller, the main roller and the auxiliary roller are arranged in the roller seat, the auxiliary synchronizing wheel is arranged at the rear end of the shaft lever of the main roller and the auxiliary roller and is connected with the main synchronizing wheel of the motor shaft through the synchronous belt, the motor rotates to drive the main roller and the auxiliary roller to rotate, the roller seat and the motor seat are positioned and arranged on the rotary table through the positioning pin, the motor and the roller rotate along with the rotation of the rotary table when the rotary table rotates, the thimble frame is arranged above the roller seat, the thimble for axially positioning the product is arranged at the rear end of the thimble frame, the pinch roller seat is arranged at the front end of the roller seat, the pinch roller spring and the pinch roller handle are arranged in the pinch roller seat, the pinch roller for radially positioning the product is arranged at the front end of the pinch roller handle, the pressing force is controlled by a pinch roller spring.
2. The finishing grinder for spherical surface machining of plunger according to claim 1, wherein: the vertical shaft of the rotary table is perpendicular to the horizontal plane and is arranged in the rotary seat, the table surface of the rotary table rotates along the horizontal plane, and the outer diameter of the rotary table is provided with a rotary table handle.
3. The finishing grinder for spherical surface machining of plunger according to claim 1, wherein: the outer ring of the radial ball bearing is fixedly pressed through the outer end cover of the rotary base shaft, the radial ball bearing is locked in the rotary base shaft hole, a dustproof sealing ring is installed in an inner hole of the outer end cover of the rotary base shaft, and the other sealing ring is installed at the opposite end.
4. The finishing grinder for spherical surface machining of plunger according to claim 1, wherein: the outer end cover of the rotary base shaft is sleeved with a rotary table gasket coated with lubricating oil, the rotary table gasket controls the axial movement of the rotary table to ensure the axial stability, and meanwhile, the bearing controls the radial runout precision of the rotary table.
5. The finishing grinder for spherical surface machining of plunger according to claim 1, wherein: and the shaft levers of the main roller and the auxiliary roller are both provided with bearings and the sand frame rotates in the roller seat.
6. The finishing grinder for spherical surface machining of plunger according to claim 1, wherein: the symmetrical center lines of the shaft holes of the main roller and the auxiliary roller on the roller seat are intersected with the central axis of the rotary table shaft to form an included angle of 90 degrees, namely, the shafts of the main roller and the auxiliary roller are vertical to a vertical plane, the center lines of the two rollers, namely, the axes of a product are vertical to the vertical plane and are intersected with the axis of the rotary table at the same time, and the two shafts are intersected, namely, a sphere is positioned at the circle center of a Z shaft and the circle center of a Y shaft, and the two shafts rotate to complete the processing of the sphere.
7. The finishing grinder for spherical surface working of plunger according to any one of claims 1 to 6, wherein: the grinding wheel dressing range of the special dressing grinder is R85-125mm, and the product clamping range is phi 5-phi 12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221123916.2U CN217194454U (en) | 2022-05-11 | 2022-05-11 | Special finishing grinder for spherical surface machining of plunger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221123916.2U CN217194454U (en) | 2022-05-11 | 2022-05-11 | Special finishing grinder for spherical surface machining of plunger |
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| CN217194454U true CN217194454U (en) | 2022-08-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799761A (en) * | 2022-05-11 | 2022-07-29 | 盘起工业(大连)有限公司 | Spherical surface processing method of plunger and special finishing grinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799761A (en) * | 2022-05-11 | 2022-07-29 | 盘起工业(大连)有限公司 | Spherical surface processing method of plunger and special finishing grinder |
| CN114799761B (en) * | 2022-05-11 | 2024-10-15 | 盘起工业(大连)有限公司 | Spherical surface processing method of plunger and special finishing grinder |
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