CN115847208B - Positioning method for grinding center hole of shaft part with irregular outer surface - Google Patents
Positioning method for grinding center hole of shaft part with irregular outer surface Download PDFInfo
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- CN115847208B CN115847208B CN202310181814.9A CN202310181814A CN115847208B CN 115847208 B CN115847208 B CN 115847208B CN 202310181814 A CN202310181814 A CN 202310181814A CN 115847208 B CN115847208 B CN 115847208B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The positioning method for grinding the center hole of the shaft part with the irregular outer surface comprises the shaft part with the irregular outer surface, an upper positioning center, a lower positioning center and three locking centers, and comprises the following steps: the shaft part is vertically placed between an upper locating center and a lower locating center; respectively abutting the upper locating center and the lower locating center into central holes at two ends of the shaft part; the three locking plugs are abutted against the outer surface of the shaft part and apply equal pressure; locking the corresponding two locking jacks at the current position through the clamping mechanism, and keeping the pressure of the other locking jack on the shaft part; and (5) removing the upper locating center to finish locating the shaft parts. The shaft part is supported by the lower locating center and is self-adaptively abutted on the irregular outer surface of the shaft part by the three locking heads, so that the shaft part with the irregular outer surface is rapidly located, and the axis of the shaft part is ensured not to deviate during the machining of the center hole.
Description
Technical Field
The invention relates to the technical field of grinding, in particular to a positioning method for grinding a center hole of a shaft part with an irregular outer surface.
Background
The center hole is usually arranged at two ends of the shaft part, and is usually used as a positioning reference of the shaft part during processing the shaft part and is also a process reference of clamping, checking and assembling positioning of the shaft part, so that the processing precision of the center hole directly influences the processing precision of the shaft part. The machining quality of the center hole mainly refers to angles, surface finish, roundness errors and coaxiality of the center holes at the two ends, and the four items have great influence on the quality of the outer circle of the ground workpiece, and particularly the roundness errors of the center hole and the coaxiality of the center holes at the two ends can directly influence the roundness of the outer circle of the workpiece. The existing positioning mode for grinding the center hole is generally manual positioning, and is time-consuming, labor-consuming and low in working efficiency; the positioning accuracy during grinding is difficult to control, and the position accuracy of the center hole is difficult to ensure.
The grinding device for the central hole of the CN212665624U shaft part and the grinding fixture for the CN110900450A are accurate, rapid and flexible, multi-core eccentric shaft, both ends of the shaft part are positioned through the V-shaped positioning assembly, and then the central hole is ground through a grinding center or a manual work. The V-shaped positioning assembly ensures that the axis of the shaft part is not deviated in the grinding process, so that the axial line is not influenced by the mutual clearance or the external force variation. However, for some shaft parts with irregular outer surfaces, the V-shaped positioning assembly is difficult to clamp the part with irregular outer surfaces, and even if the part is clamped, multiple adjustments are required to position the axis of the part. The work of grinding the center hole of the shaft part with the irregular outer surface becomes complex, and the work efficiency and the qualification rate are low.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a positioning method for grinding the central hole of an irregular shaft part on the outer surface, which aims to quickly position the irregular shaft part on the outer surface and ensure that the axis of the shaft part is not deviated during the grinding of the central hole.
The utility model provides a positioning method of grinding surface irregular axle class part centre bore, includes the surface irregular axle class part all be provided with the centre bore on the both ends terminal surface of axle class part, the centre bore is located on the axis of axle class part, set up top location top and lower location top and make both coaxial settings, be provided with three locking top between top location top and the lower location top, the axis of these three locking tops is located same horizontal plane and is circular array and distributes, the axis of these three locking tops intersects on the axis between top location top and the lower location top, these three locking tops all move the setting along the direction of its axis and are driven by first telescopic machanism, second telescopic machanism and third telescopic machanism respectively, all be provided with in first telescopic machanism and the second telescopic machanism be used for with corresponding two locking tops lock the clamping mechanism in current position, positioning method includes the following steps:
step 1: the shaft part is vertically placed between an upper locating center and a lower locating center;
step 2: respectively abutting the upper locating center and the lower locating center into central holes at two ends of the shaft part so as to locate the axial position of the shaft part;
step 3: the three locking plugs are abutted against the outer surface of the shaft part and apply equal pressure;
step 4: locking the corresponding two locking plugs at the current position through a clamping mechanism, and keeping the pressure of the other locking plug on the shaft part;
step 5: removing the upper locating center to finish locating the shaft part;
step 6: grinding the central hole at the upper end of the shaft part in the current state through the conical surface grinding wheel, removing the three locking plugs after the grinding of the central hole at the upper end of the shaft part is completed, inverting the shaft part, and repeating the steps 2 to 5 to realize repositioning of the shaft part, and grinding the central hole at the upper end of the shaft part in the current state through the conical surface grinding wheel.
The method further comprises the following steps: the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are fixedly connected to a C-shaped base, the third telescopic mechanism is located in the middle of the base, the first telescopic mechanism and the second telescopic mechanism are identical in structure and located at two end parts of the base respectively, the first telescopic mechanism comprises a first telescopic rod, the third telescopic mechanism comprises a second telescopic rod, and three locking top heads are fixedly connected to the front end of the first telescopic rod in the first telescopic mechanism, the front end of the first telescopic rod in the second telescopic mechanism and the front end of the second telescopic rod in the third telescopic mechanism respectively; the clamping mechanism is used for locking the current position of the corresponding first telescopic rod; the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are pneumatic sources or hydraulic sources, and the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are the same. The two locking plugs are fixed in position, and one locking plug is arranged to apply pressure to the outer surface of the shaft part, so that force balance between the three locking plugs and the shaft part is ensured, the axial line of the shaft part is prevented from being deviated due to uneven pressure of the three locking plugs, and further the position accuracy of the central hole is ensured not to be affected.
The method further comprises the following steps: in the step 3, the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are all 0.3-0.4MPa.
The method further comprises the following steps: the clamping mechanism comprises a base plate and clamping jaws, wherein the base plate is made of spring steel, the base plate is located between the first telescopic rod and the base, the base plate is fixedly connected to the base and is close to the first telescopic rod, the clamping jaws are integrally arranged on the left side and the right side of the base plate, the clamping jaws comprise a rocker and connecting plates, the rocker is obliquely arranged, the upper side edges of the rockers on the two sides of the base plate are respectively located on the two sides of the first telescopic rod and are oppositely arranged, the connecting plates are used for being integrally connected between the rockers and are elastically deformed when the lower parts of the rockers swing, the lower parts of the rockers on the two sides of the base plate extend to the lower part of the base plate, and an actuating mechanism for enabling the lower parts of the rockers to be mutually far away is arranged between the lower parts of the rockers on the two sides of the base plate; in the step 4, the lower parts of the seesaw are separated from each other by the executing mechanism, so that the upper parts of the seesaw are close to each other and clamp the first telescopic rod, and the first telescopic rod is fixed at the current position.
In order to improve the structural strength between the connecting plate and the wane, further: the connecting plate and the wane are mutually perpendicular and form a T-shaped structure, and the connecting plate and the wane and the connecting plate and the base plate are in transitional connection through an arc-shaped structure.
For convenient processing, further: the lower part bolt of wane have be used for with actuating mechanism linkage's push pedal, actuating mechanism is flexible cylinder, the cylinder body fixed connection of flexible cylinder is in one of them on the push pedal of wane lower part, the telescopic link of flexible cylinder is towards and is close to on the push pedal of another wane lower part.
The method further comprises the following steps: the third telescopic mechanism is a triaxial cylinder, the top end of a second telescopic rod of the triaxial cylinder is fixedly connected to the top plate, and the middle part of the top plate is fixedly provided with the locking top; the cylinder body of the triaxial cylinder is fixedly connected to the base.
In order to improve the stability of the first telescopic link, further: the middle part of the first telescopic link is in sliding fit with the sliding block through the clamping groove, and the sliding block is fixedly connected to the base.
To save space, further: the lower part of the end part of the base is fixedly provided with a single-rod air cylinder, the single-rod air cylinder and the first telescopic rod are vertically corresponding and are mutually parallel, and a synchronous plate is fixedly connected between the top end of the third telescopic rod of the single-rod air cylinder and the tail end of the first telescopic rod.
The invention has the beneficial effects that: the shaft part is supported by the lower locating center and is self-adaptively abutted on the irregular outer surface of the shaft part by the three locking heads, so that the shaft part with the irregular outer surface is rapidly located, and the axis of the shaft part is ensured not to deviate during the machining of the center hole.
Drawings
FIG. 1 is a diagram of the positional relationship between an upper locating tip, a lower locating tip and a shaft-type part in the present invention;
FIG. 2 is a diagram of the positional relationship between an upper locating tip, a lower locating tip, a locking tip and a shaft-type part in the present invention;
FIG. 3 is a diagram showing the positional relationship among the lower locating tip, the locking tip and the shaft-type part in the present invention;
FIG. 4 is a diagram showing the positional relationship among the conical grinding wheel, the lower locating tip, the locking tip and the shaft part in the invention;
FIG. 5 is a top view of the positional relationship among the first telescoping mechanism, the second telescoping mechanism, the third telescoping mechanism, the base and the shaft-like component of the present invention;
FIG. 6 is a schematic cross-sectional view of the AA in FIG. 5.
In the figure, 1, a base; 2. a third telescopic mechanism; 3. locking the plug; 4. a slide block; 5. a first telescopic rod; 6. a synchronizing plate; 7. a clamping mechanism; 71. a seesaw; 72. a connecting plate; 73. a substrate; 74. an actuator; 8. a push plate; 9. a single rod cylinder; 100. shaft parts; 101. a lower locating center; 102. an upper locating center; 103. conical grinding wheel.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. The terms left, middle, right, upper, lower, etc. in the embodiments of the present invention are merely relative concepts or references to the normal use state of the product, and should not be construed as limiting.
The positioning method for grinding the center hole of the shaft part with the irregular outer surface comprises a shaft part 100 with the irregular outer surface, wherein center holes are formed in the end faces of two ends of the shaft part 100, the center holes are located on the axes of the shaft part 100, an upper positioning center 102 and a lower positioning center 101 are arranged and are coaxially arranged, three locking heads 3 are arranged between the upper positioning center 102 and the lower positioning center 101, the axes of the three locking heads 3 are located in the same horizontal plane and distributed in a circular array, the axes of the three locking heads 3 are intersected on the axes between the upper positioning center 102 and the lower positioning center 101, the three locking heads 3 are arranged in a reciprocating mode along the directions of the axes and are driven by a first telescopic mechanism, a second telescopic mechanism and a third telescopic mechanism 2 respectively, and clamping mechanisms 7 for locking the corresponding two locking heads 3 at the current position are arranged in the first telescopic mechanism and the second telescopic mechanism respectively, and the positioning method comprises the following steps:
step 1: the shaft part 100 is vertically arranged between an upper locating center 102 and a lower locating center 101;
step 2: the upper locating center 102 and the lower locating center 101 are respectively abutted to the central holes at the two ends of the shaft part 100, so that the axial position of the shaft part 100 is located; at this time, the axis between the upper locating center 102 and the lower locating center 101 coincides with the axis of the shaft part 100;
step 3: three locking plugs 3 are abutted against the outer surface of the shaft part 100 and apply equal pressure;
step 4: the corresponding two locking plugs 3 are locked at the current position through the clamping mechanism 7, and the pressure of the other locking plug 3 on the shaft part 100 is kept;
step 5: removing the upper locating center 102 to finish locating the shaft part 100;
step 6: grinding the central hole at the upper end of the shaft part 100 in the current state through the conical surface grinding wheel 103, removing the three locking plugs 3 after the grinding of the central hole at the upper end of the shaft part 100 is completed, inverting the shaft part 100, and repeating the steps 2 to 5 to realize repositioning of the shaft part 100, and grinding the central hole at the upper end of the shaft part 100 in the current state through the conical surface grinding wheel 103.
The first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism 2 are fixedly connected to the C-shaped base 1, the third telescopic mechanism 2 is located in the middle of the base 1, the first telescopic mechanism and the second telescopic mechanism are identical in structure and located at two end parts of the base 1 respectively, the first telescopic mechanism comprises a first telescopic rod 5, the third telescopic mechanism 2 comprises a second telescopic rod, and three locking top heads 3 are fixedly connected to the front end of the first telescopic rod 5 in the first telescopic mechanism, the front end of the first telescopic rod 5 in the second telescopic mechanism and the front end of the second telescopic rod in the third telescopic mechanism 2 respectively; the clamping mechanism 7 is used for locking the current position of the corresponding first telescopic rod 5; the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism 2 are air pressure sources or hydraulic pressure sources, and the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism 2 are the same. The positions of the two locking plugs 3 are fixed, and the other locking plug 3 is arranged to apply pressure to the outer surface of the shaft part 100, so that the force balance between the three locking plugs 3 and the shaft part 100 is ensured, the axial line of the shaft part 100 is prevented from being deviated due to uneven pressure of the three locking plugs 3, and the grinding position of the center hole is further ensured not to be affected.
In the step 3, the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism 2 are all 0.3-0.4Mpa, the clamping mechanism 7 comprises a base plate 73 and a clamping jaw which are all made of spring steel, the base plate 73 is positioned between the first telescopic rod 5 and the base 1, the base plate 73 is fixedly connected to the base 1 and is close to the first telescopic rod 5, the clamping jaw is integrally arranged on the left side and the right side of the base plate 73, the clamping jaw comprises a rocker 71 and a connecting plate 72, the rocker 71 is obliquely arranged, the upper side edges of the rocker 71 on the two sides of the base plate 73 are respectively positioned on the two sides of the first telescopic rod 5 and are oppositely arranged, the connecting plate 72 is used for being integrally connected between the rocker 71 and is elastically deformed when the lower part of the rocker 71 swings, the lower parts of the rocker 71 on the two sides of the base plate 73 extend to the lower part of the base plate 73, the rocker 71 is arranged on the two sides of the base plate 73, and the lower part of the base plate 73 is provided with a rocker 71 which is used for making the lower part of the rocker 71 far away from each other; step 4 includes moving the lower parts of the rocker plates 71 away from each other by the actuator 74 so that the upper parts of the rocker plates 71 approach each other and clamp the first telescopic link 5. The connecting plate 72 and the rocker 71 are perpendicular to each other and form a T-shaped structure, and the connecting plate 72 and the rocker 71 and the connecting plate 72 and the base plate 73 are in transitional connection through an arc structure. The lower part of the rocker 71 is bolted with a push plate 8 which is used for being linked with an actuating mechanism 74, the actuating mechanism 74 is a telescopic cylinder, the cylinder body of the telescopic cylinder is fixedly connected to the push plate 8 at the lower part of one rocker 71, and the telescopic rod of the telescopic cylinder faces towards and is close to the push plate 8 at the lower part of the other rocker 71.
In addition, the third telescopic mechanism 2 is a triaxial cylinder, the top end of a second telescopic rod of the triaxial cylinder is fixedly connected to a top plate, and the middle part of the top plate is fixedly provided with the locking top 3; the cylinder body of the triaxial cylinder is fixedly connected to the base 1. The middle part of the first telescopic rod 5 is in sliding fit on the sliding block 4 through a clamping groove, and the sliding block 4 is fixedly connected to the base 1. The lower part of the end part of the base 1 is fixedly provided with a single-rod air cylinder 9, the single-rod air cylinder 9 corresponds to the first telescopic rod 5 up and down and is parallel to each other, and a synchronizing plate 6 is fixedly connected between the top end of a third telescopic rod of the single-rod air cylinder 9 and the tail end of the first telescopic rod 5.
Compared with the prior art, the two locking plugs 3 with the self-locking function can ensure that the positions of the two locking plugs are not changed; the other locking plug 3 continuously gives thrust to the shaft part 100, so that no gap exists between the three locking plugs 3 and the shaft part 100, and the stress is balanced; and then the lower locating center 101 is matched, so that the shaft part 100 with the irregular outer surface can be rapidly and stably clamped, and the axial line of the shaft part 100 is ensured not to deviate when the center hole is ground.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a locating method of grinding surface irregular axle class part centre bore, includes the surface irregular axle class part all be provided with the centre bore on the both ends terminal surface of axle class part, the centre bore is located on the axis of axle class part, its characterized in that: the method comprises the steps that an upper locating center and a lower locating center are arranged and are coaxially arranged, three locking heads are arranged between the upper locating center and the lower locating center, the axes of the three locking heads are located in the same horizontal plane and distributed in a circular array, the axes of the three locking heads are intersected on the axes between the upper locating center and the lower locating center, the three locking heads are arranged in a reciprocating mode along the directions of the axes of the three locking heads and are driven by a first telescopic mechanism, a second telescopic mechanism and a third telescopic mechanism respectively, and clamping mechanisms used for locking the corresponding two locking heads at the current position are arranged in the first telescopic mechanism and the second telescopic mechanism; the positioning method comprises the following steps:
step 1: the shaft part is vertically placed between an upper locating center and a lower locating center;
step 2: respectively abutting the upper locating center and the lower locating center into central holes at two ends of the shaft part so as to locate the axial position of the shaft part;
step 3: the three locking plugs are abutted against the outer surface of the shaft part and apply equal pressure;
step 4: locking the corresponding two locking plugs at the current position through a clamping mechanism, and keeping the pressure of the other locking plug on the shaft part;
step 5: removing the upper locating center to finish locating the shaft part;
step 6: grinding the central hole at the upper end of the shaft part in the current state through a conical surface grinding wheel, removing three locking plugs after the grinding of the central hole at the upper end of the shaft part is completed, inverting the shaft part, and repeating the steps 2 to 5 to realize repositioning of the shaft part, and grinding the central hole at the upper end of the shaft part in the current state through the conical surface grinding wheel;
the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are fixedly connected to a C-shaped base, the third telescopic mechanism is located in the middle of the base, the first telescopic mechanism and the second telescopic mechanism are identical in structure and located at two end parts of the base respectively, the first telescopic mechanism comprises a first telescopic rod, the third telescopic mechanism comprises a second telescopic rod, and three locking top heads are fixedly connected to the front end of the first telescopic rod in the first telescopic mechanism, the front end of the first telescopic rod in the second telescopic mechanism and the front end of the second telescopic rod in the third telescopic mechanism respectively; the clamping mechanism is used for locking the current position of the corresponding first telescopic rod; the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are all pneumatic sources or all hydraulic sources, and the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are the same; the clamping mechanism comprises a base plate and clamping jaws, wherein the base plate is made of spring steel, the base plate is located between the first telescopic rod and the base, the base plate is fixedly connected to the base and is close to the first telescopic rod, the clamping jaws are integrally arranged on the left side and the right side of the base plate, the clamping jaws comprise a rocker and connecting plates, the rocker is obliquely arranged, the upper side edges of the rockers on the two sides of the base plate are respectively located on the two sides of the first telescopic rod and are oppositely arranged, the connecting plates are used for being integrally connected between the rockers and are elastically deformed when the lower parts of the rockers swing, the lower parts of the rockers on the two sides of the base plate extend to the lower part of the base plate, and an actuating mechanism for enabling the lower parts of the rockers to be mutually far away is arranged between the lower parts of the rockers on the two sides of the base plate; in the step 4, the lower parts of the seesaw are separated from each other by the executing mechanism, so that the upper parts of the seesaw are close to each other and clamp the first telescopic rod, and the first telescopic rod is fixed at the current position.
2. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: in the step 3, the pressures of the driving sources of the first telescopic mechanism, the second telescopic mechanism and the third telescopic mechanism are all 0.3-0.4Mpa.
3. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: the connecting plate and the wane are mutually perpendicular and form a T-shaped structure, and the connecting plate and the wane and the connecting plate and the base plate are in transitional connection through an arc-shaped structure.
4. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: the lower part bolt of wane have be used for with actuating mechanism linkage's push pedal, actuating mechanism is flexible cylinder, the cylinder body fixed connection of flexible cylinder is in one of them on the push pedal of wane lower part, the telescopic link of flexible cylinder is towards and is close to on the push pedal of another wane lower part.
5. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: the third telescopic mechanism is a triaxial cylinder, the top end of a second telescopic rod of the triaxial cylinder is fixedly connected to the top plate, and the middle part of the top plate is fixedly provided with the locking top; the cylinder body of the triaxial cylinder is fixedly connected to the base.
6. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: the middle part of the first telescopic link is in sliding fit with the sliding block through the clamping groove, and the sliding block is fixedly connected to the base.
7. The positioning method for grinding the center hole of the shaft part with the irregular outer surface according to claim 1, wherein the positioning method comprises the following steps: the lower part of the end part of the base is fixedly provided with a single-rod air cylinder, the single-rod air cylinder and the first telescopic rod are vertically corresponding and are mutually parallel, and a synchronous plate is fixedly connected between the top end of the third telescopic rod of the single-rod air cylinder and the tail end of the first telescopic rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310181814.9A CN115847208B (en) | 2023-03-01 | 2023-03-01 | Positioning method for grinding center hole of shaft part with irregular outer surface |
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| CN202310181814.9A CN115847208B (en) | 2023-03-01 | 2023-03-01 | Positioning method for grinding center hole of shaft part with irregular outer surface |
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| CN115847208B true CN115847208B (en) | 2023-05-16 |
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| CN117226746B (en) * | 2023-11-13 | 2024-02-27 | 山东舜晟冲压科技股份有限公司 | Unsmooth face fastening tool for detecting car body cabin cross beam |
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| TW201701997A (en) * | 2015-07-07 | 2017-01-16 | 韓啓仁 | Center hole grinding machine |
| CN213054294U (en) * | 2020-08-13 | 2021-04-27 | 荆州环球汽车零部件制造有限公司 | Clamp for simultaneously grinding center holes at two ends of shaft part |
| CN216138624U (en) * | 2021-09-03 | 2022-03-29 | 珺茂精密制造(苏州)有限公司 | Centre bore grinding device is used in processing of axle type gear |
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| CN115847208A (en) | 2023-03-28 |
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