CN108312021B - Fatigue sample precision polishing system and method mounted on cylindrical grinding machine - Google Patents
Fatigue sample precision polishing system and method mounted on cylindrical grinding machine Download PDFInfo
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- CN108312021B CN108312021B CN201810317527.5A CN201810317527A CN108312021B CN 108312021 B CN108312021 B CN 108312021B CN 201810317527 A CN201810317527 A CN 201810317527A CN 108312021 B CN108312021 B CN 108312021B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B25/00—Grinding machines of universal type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to a precise polishing system and a method for a fatigue sample mounted on a cylindrical grinder, belonging to the technical field of metal fatigue sample polishing processing, and relating to a longitudinal precise free abrasive air drum polishing system and a method for a circular section fatigue sample, which consists of a cantilever mechanism, a clamping plate, an adjustable spring, a polishing main shaft and a polishing slurry injection circulation system; the system can be installed on the basis of the existing cylindrical grinding machine, so that the grinding and polishing functions of the fatigue test sample are realized on one grinding machine, the process is concentrated, the workpiece installation times are reduced, and the efficiency is improved; compared with manual sand paper, the polishing precision, stability and reliability are high, the polishing efficiency can be greatly improved, and the labor intensity of workers is reduced.
Description
Technical Field
The invention belongs to the technical field of metal fatigue specimen polishing processing, and relates to a longitudinal precise free abrasive air drum polishing system and method for a circular section fatigue specimen.
Background
According to GB/T3075-2008 axial force control method for fatigue test of metal materials, the original cross section of the test sample for fatigue test of metal materials is provided with two types of round and rectangular, the most widely used test sample is a round cross section at present, the standard suggests that the processing flow of the test sample is longitudinal milling, finish turning and finish grinding, and then the final finish machining of the surface of a working part is carried out by a longitudinal polishing method, the polishing purpose is to minimize the residual stress and work hardening generated on the surface of the test sample, the transverse processing trace is avoided under the magnification of at least 20 times, the number of fatigue test samples is large, the requirements on the consistency of the surface roughness and the residual stress are high, and the polishing process and method are improved, so that the surface quality of the fatigue test sample meeting the standard requirements is effectively obtained.
At present, due to the limitation of equipment, transverse grinding is often adopted, if the polishing is not thorough, tool marks and scratches can not be completely removed, and the tool marks and scratches become stress concentration points; most of the existing polishing modes are manual sand paper polishing, and the surface roughness and residual stress are unevenly distributed, so that fatigue experiment result data are scattered; and the manual polishing efficiency is low, the labor intensity is high, and the sand paper consumption is high. At present, no equipment for polishing a fatigue sample exists, and a system and a method for polishing a longitudinal precise free abrasive gas drum for a circular section fatigue sample are required to be invented.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention discloses a precision polishing system and a method for a fatigue sample mounted on a cylindrical grinder; the precise polishing system consists of a polishing air drum rotation and polishing slurry injection circulation system; the polishing system and the headstock rotation of the cylindrical grinder in the prior art jointly realize the polishing function.
The technical scheme adopted by the invention is as follows:
the precise polishing system for the fatigue test sample mounted on the cylindrical grinding machine comprises a cantilever structure, wherein the cantilever structure comprises a clamping device clamped on a grinding wheel protective cover of the grinding machine, a frame, a connecting rod I, a connecting rod II, a connecting rod III and an adjustable elastic device, the frame is fixed on the clamping device, the frame is hinged with the connecting rod I, the connecting rod I is hinged with the connecting rod III, and the connecting rod II is respectively connected with the connecting rod I and the connecting rod III and is used for fixing an included angle between the connecting rod I and the connecting rod III; the adjustable elastic device is tensioned between the frame and the connecting rod I, so that the pressing force of the cantilever mechanism is adjusted; a polishing main shaft is fixed on the connecting rod III, the polishing main shaft drives the air drum to rotate, and a polishing slurry injection circulation system is also fixed on one side of the polishing main shaft.
Further, the polishing main shaft is connected to a polishing main shaft fixing frame through a polishing main shaft fastening bolt, and the polishing main shaft fixing frame is connected to a connecting rod III through a connecting bolt; the polishing spindle mount can have a range of positional variations along the connecting rod iii.
Further, the polishing slurry spraying and circulating system comprises a polishing slurry nozzle fixed on one side of the polishing spindle and a polishing slurry recoverer fixed below the nozzle; the polishing slurry nozzle is connected with the liquid supply system, the polishing slurry recoverer is connected with the recovery system, and the recovery system sends the recovered slurry to the liquid supply system from new.
Furthermore, the polishing slurry nozzle is connected to the fixing frame of the polishing main shaft through the nozzle fixing frame, and the installation mode has the advantages that: when the fixing frame of the polishing main shaft drives the polishing main shaft to adjust the position, the position of the polishing slurry recoverer can be adjusted together.
Further, the polishing slurry recoverer is fixed on the connecting rod III, and the position adjustment of the polishing slurry recoverer can be realized simultaneously when the position of the connecting rod III is adjusted; the polishing slurry does not pollute the bed body of the cylindrical grinder during polishing, and the bottom of the recoverer is connected with an output pipeline, so that the slurry input into the recoverer can be circulated at any time.
Further, the clamping device is a clamping plate, the clamping plate is clamped at the top end of the grinding wheel protective cover through a clamping bolt, and the cantilever mechanism is clamped on the outer circle grinding machine.
Further, the polishing slurry is mainly silicon carbide slurry or corundum slurry.
Furthermore, the cantilever mechanism can determine the exact angular arrangement of the connecting rods I, II and III according to the specific contact position of the air drum and the fatigue test sample.
Further, the tail end of the adjustable spring is fixed on the clamping plate or the frame through a fastening bolt, the front end of the adjustable spring is fixed on the connecting rod I through a bolt II, and the elastic force of the adjustable spring can be adjusted, so that the pressing force of the cantilever mechanism is adjusted, and the radial polishing pressure of the polishing gas drum and the fatigue test sample is adjusted.
Further, the polishing main shaft is connected to a polishing main shaft fixing frame through a polishing main shaft fastening bolt, and the polishing main shaft fixing frame is connected to a connecting rod III through a polishing main shaft fixing frame connecting bolt; the polishing spindle mount can have a range of positional variations along the connecting rod iii.
The invention also provides a method for polishing the fatigue test sample by using the precise polishing system, which comprises the following specific processing steps:
step one: clamping the clamping device on the grinding wheel protective cover, mounting the stand and the tail end of the adjustable spring on the clamping device, and mounting the cantilever mechanism;
step two: the front end of the adjustable spring, the polishing main shaft and the polishing slurry recoverer are arranged on the cantilever mechanism, and the cantilever mechanism is fixed according to the specific contact position of the polishing gas drum and the fatigue sample;
step three: after the installation is finished, polishing the ground fatigue test sample, closing all machines after the polishing is finished and the requirement is met, loosening a bolt V of the cantilever mechanism, loosening the front end of the adjustable spring, lifting the whole cantilever mechanism upwards, and placing the whole cantilever mechanism on a grinding wheel cover, so that the grinding processing of the next fatigue test sample is not affected;
step four: after the grinding and polishing processing of all the fatigue test samples is finished, the system can be disassembled and stored.
The beneficial effects of the invention are as follows:
the precise polishing system consists of a polishing air drum rotation and polishing slurry injection circulation system; the polishing system and the headstock of the cylindrical grinder in the prior art jointly realize the polishing function; the rotating speed of the polishing main shaft is adjustable through a driving device, the rotating speed and the longitudinal feeding speed of a workpiece in the polishing process can be adjusted by utilizing a feeding system of the cylindrical grinder, the radial polishing pressure of the air drum on the fatigue sample in the polishing process can be changed by utilizing an adjustable spring of the system, and the formula of polishing slurry can be adjusted as required;
the invention solves the technical problems of overcoming the defects of the prior art, realizes the polishing of the fatigue test sample by utilizing the precise polishing system of the fatigue test sample mounted on the cylindrical grinding machine, and can be completely and directly mounted on the prior cylindrical grinding machine, thereby realizing the grinding and polishing functions of the fatigue test sample on one grinding machine, realizing concentrated forming process, reducing the mounting times of workpieces and providing efficiency
When the polishing process parameters are aimed at, the optimal polishing process parameters can be obtained by carrying out optimization experiments taking polishing quality as constraint conditions and polishing efficiency as targets through changing the viscosity of polishing slurry, the granularity and mass percentage of abrasive materials in the slurry, the rotating speed and longitudinal feeding speed of a workpiece, the rotating speed of a polishing main shaft, the radial polishing pressure of the workpiece and other polishing process parameters.
The design of the cantilever mechanism in the invention considers that the whole fatigue sample polishing system is arranged at the exact position of the cylindrical grinder, the space in which the cylindrical grinder can be arranged determines the whole structure of the polishing system to be a cantilever structure, the structure can determine the accurate position of the polishing system during working by adjusting the angle between connecting rods during polishing, and the polishing system is convenient to lift upwards after the polishing process is finished, so that the grinding process of the cylindrical grinder is not influenced; the polishing slurry spraying and circulating system and the polishing main shaft are detachably arranged and can be fixed at different positions along the connecting rod III, so that the polishing slurry spraying and circulating system and the polishing main shaft can adjust angles and accurately fix positions according to the specific size of a fatigue sample to be polished.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
FIG. 1 is a schematic view of the overall installation of a precision polishing system and method for fatigue test specimens mounted on a cylindrical grinding machine in accordance with the present invention;
FIG. 2 is a partial block diagram of the present invention;
FIG. 3 is a schematic view of the longitudinal polishing of the present invention;
FIG. 4 is a schematic diagram of a light slurry spray circulation system according to the present invention
Wherein, 1, a tailstock, 2, a guide rail, 3, a fatigue sample, 4, a grinding wheel protective cover, 5, a clamping bolt, 6, a clamping plate, 7, a fastening bolt, 8, a frame, 9, bolts I, 10, an adjustable spring, 10-a, an adjustable spring front end, 10-b, an adjustable spring tail end, 11, bolts II, 12, connecting rods I, 13, bolts III, 14, connecting rods II, 15 and bolts IV, 16, connecting rods III, 17, bolts V, 18, polishing spindle fixing frames, 19, a recoverer fixing frame, 20, a polishing slurry recoverer, 21, a headstock, 22, polishing spindle fastening bolts, 23, fixing frame connecting bolts, 24, polishing spindles, 25, polishing slurry nozzles, 26, nozzle fixing frames, 27, a gas drum, 28, a recoverer output pipeline, 29 and a slurry pump.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper" and "lower" in the present invention, if they mean only the directions of upper, lower, left and right in correspondence with the drawings themselves, are not limiting in terms of structure, but merely for convenience of description and simplification of description, rather than indicating or implying that the apparatus or element in question must have a specific orientation, construction and operation in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "mounted," "connected," "secured," and the like are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral body, for example; the terms are used herein as specific meanings as understood by those of ordinary skill in the art, and are not limited to the following terms.
As described in the background art, there are various disadvantages in the prior art, and in order to solve the above technical problems, the present application proposes a system and a method for precisely polishing a fatigue specimen mounted on a cylindrical grinding machine, wherein the precise polishing process of the system is composed of rotation of a polishing gas drum, rotation of a headstock of the cylindrical grinding machine and a delivery system of polishing slurry, and the system constitution determines the polishing advantages of the polishing slurry for the fatigue specimen:
(1) The system can be installed on the basis of the existing cylindrical grinding machine, so that the grinding and polishing functions of the fatigue test sample are realized on one grinding machine, the process is concentrated, the workpiece installation times are reduced, and the efficiency is improved;
(2) The shape of the air drum is flexible, and the air drum can be automatically deformed according to the curvature of a polished area, so that the stability of polishing pressure is ensured;
(3) The rotating speed of the polishing main shaft is adjustable, the rotating speed and the longitudinal feeding speed of a workpiece in the polishing process can be adjusted by utilizing a feeding system of the cylindrical grinder, the radial polishing pressure of the air drum on the fatigue sample in the polishing process can be changed by utilizing an adjustable spring of the system, and the formula of polishing slurry can be adjusted as required;
(4) The optimal polishing process parameters can be obtained by carrying out optimization experiments taking polishing quality as a constraint condition and polishing efficiency as a target by changing the viscosity of polishing slurry, the granularity and mass percentage of abrasive materials in the slurry, the rotating speed and longitudinal feeding speed of a workpiece, the rotating speed of a polishing main shaft, the radial polishing pressure of the workpiece and other polishing process parameters;
(5) Compared with manual sand paper, the polishing precision, stability and reliability are high, the polishing efficiency can be greatly improved, and the labor intensity of workers is reduced.
(6) The polishing system is convenient to install and detach, and the basic structure of the external circular grinding machine is not influenced.
The system comprises a frame 8, an adjustable elastic device (such as an adjustable spring 10 in the figure), a connecting rod I12, a connecting rod II 14, a connecting rod III 16 and a clamping device, wherein the frame 8 is fixed on the clamping device, the adjustable elastic device is tensioned between the frame 8 and the connecting rod I12, a polishing slurry injection circulation system and a polishing main shaft are arranged on the connecting rod III 16, and finally, a cantilever mechanism of the whole polishing system is realized;
the frame 8 is screwed on the clamping device by a fastening bolt 7, the clamping device is clamped at the top end of the grinding wheel protective cover 4 by the clamping bolt 5, and the cantilever mechanism is clamped on the outer circle grinding machine;
the polishing slurry recoverer is connected to the connecting rod III 16, the polishing slurry does not pollute the bed body of the cylindrical grinding machine during polishing, and the bottom of the recoverer is connected with an output pipeline, so that the slurry input into the recoverer can be circulated at any time;
the polishing slurry in the invention is mainly silicon carbide slurry or corundum slurry;
the clamping means may employ a clamping plate 6 as shown;
the cantilever mechanism can determine the exact angle arrangement of the connecting rods I, II and III according to the specific contact position of the air drum and the fatigue test sample;
the tail end of the adjustable elastic device is fixed on the clamping plate through a fastening bolt, the front end of the adjustable elastic device is fixed on the connecting rod I through a bolt II, and the adjustable elastic device can adjust elasticity, so that the adjustment of the pressing force of the cantilever mechanism is realized, and the radial polishing pressure of the polishing air drum and the fatigue test sample is further adjusted;
the adjustable elastic means may preferably be an adjustable spring 10 as shown in the drawings, wherein the front end 10-a of the adjustable spring is connected to the connecting rod I by a bolt, and the front end 10-b of the adjustable spring is fixed to the bracket 8 or the clamping device 6.
In a further preferred embodiment, two adjustable springs 10 are provided, symmetrically arranged on both sides of the connecting rod I.
Further, the connecting rod I12 is connected with the frame 8 through a bolt I9, the connecting rod I12 is connected with the connecting rod II 14 through a bolt III 16, and the connecting rod I12 is connected with the connecting rod III 16 through a bolt IV 15; the connecting rod II 14 is connected with the connecting rod III through the bolt V17, when the cantilever mechanism is adjusted to a proper position, the bolt V17 can be screwed down, the connecting rod I12, the connecting rod II 14 and the connecting rod III 16 form a triangle, and the stability of the triangle is utilized to form stable connection of the proper position of the cantilever mechanism.
In a further preferred embodiment, the connecting rod II 14 comprises two symmetrically arranged on both sides of the connecting rod I and the connecting rod III; and be equipped with a bolt V17 position adjustment groove on connecting rod II, through adjusting bolt V17 in the position in adjustment groove, can realize connecting rod I and connecting rod III different angle's fixed.
In the polishing slurry spraying and circulating system, a polishing slurry nozzle 25 is connected to a polishing spindle fixing frame 18 through a nozzle fixing frame, and polishing slurry is conveyed to the polishing slurry nozzle 25 through an output pipeline by a slurry pump 29 and is sprayed between a gas drum and a fatigue sample, so that polishing of the polishing slurry is realized; the bottom of the slurry recoverer 20 is connected with an output pipeline 28, and the slurry input into the recoverer can be conveyed into a slurry pump at any time for circulation.
The lower end of the polishing main shaft 24 is connected with an air drum 27, and the air drum 27 is tangential with the workpiece; the polishing spindle 24 is connected to the polishing spindle fixing frame 18 through a polishing spindle fastening bolt 22, and the polishing spindle fixing frame 18 is connected to the connecting rod III 16 through a polishing spindle fixing frame connecting bolt 23; the polishing spindle mount 18 can be varied in position along the connecting rod III 16 to a certain extent; the precise polishing system and the method for the fatigue test sample mounted on the cylindrical grinder, which are used for polishing the fatigue test sample, comprise the following specific processing steps:
step one: clamping the clamping plate 6 on the grinding wheel protective cover 4, mounting the tail ends of the stand 8 and the adjustable spring 10 on the clamping plate 6, and mounting a cantilever mechanism;
step two: the front end of the adjustable spring, the polishing main shaft and the polishing slurry recoverer are arranged on the cantilever mechanism, and the cantilever mechanism is fixed according to the specific contact position of the polishing gas drum and the fatigue sample;
step three: after the installation is finished, polishing the ground fatigue test sample 3, closing all machines after the polishing is finished and the requirement is met, loosening a bolt V of the cantilever mechanism, loosening the front end of the adjustable spring, lifting the whole cantilever mechanism upwards, and placing the whole cantilever mechanism on a grinding wheel cover, so that the grinding processing of the next fatigue test sample is not affected;
step four: after the grinding and polishing processing of all the fatigue test samples is finished, the system can be disassembled and stored.
The grinding machine adopts the existing grinding machine structure, and as shown in fig. 1, the grinding machine comprises a tailstock 4 and a headstock 21, and a guide rail 2 is arranged on a machine tool; the fatigue test sample is clamped between the headstock 21 and the tailstock 1, the center of the tailstock 1 has a certain size variation range, and the tailstock can move on the guide rail, so that the clamping requirements of the fatigue test samples with different lengths are met; the system can be directly installed on the basis of the existing cylindrical grinding machine, so that the grinding and polishing functions of the fatigue test sample are realized on one grinding machine, the forming process is concentrated, the workpiece installation times are reduced, and the efficiency is improved; compared with manual sand paper, the polishing precision, stability and reliability are high, the polishing efficiency can be greatly improved, and the labor intensity of workers is reduced.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (5)
1. The precise polishing system for the fatigue test sample is characterized by comprising a cantilever structure, wherein the cantilever structure comprises a clamping device clamped on a grinding wheel protective cover of a grinding machine, a frame, a connecting rod I, a connecting rod II, a connecting rod III and an adjustable elastic device, the frame is fixed on the clamping device, the frame is hinged with the connecting rod I, the connecting rod I is hinged with the connecting rod III, and the connecting rod II is respectively connected with the connecting rod I and the connecting rod III and is used for fixing an included angle between the connecting rod I and the connecting rod III; the adjustable elastic device is tensioned between the frame and the connecting rod I, so that the pressing force of the cantilever structure is adjusted; a polishing main shaft is fixed on the connecting rod III, the polishing main shaft drives the air drum to rotate, and a polishing slurry injection circulation system is also fixed on one side of the polishing main shaft; the polishing main shaft is connected to a polishing main shaft fixing frame through a polishing main shaft fastening bolt, and the polishing main shaft fixing frame is connected to a connecting rod III through a connecting bolt; the polishing main shaft fixing frame can have a certain range of position variation along the connecting rod III; the polishing slurry spraying and circulating system comprises a polishing slurry nozzle fixed on one side of the polishing spindle and a polishing slurry recoverer fixed below the nozzle; the polishing slurry nozzle is connected with the liquid supply system, the polishing slurry recoverer is connected with the recovery system, and the recovery system is used for conveying recovered slurry to the liquid supply system again.
2. The precision polishing system for fatigue test pieces mounted on a cylindrical grinder according to claim 1, wherein the polishing slurry nozzle is connected to the polishing spindle holder through a nozzle holder; the polishing slurry recoverer is fixed on the connecting rod III.
3. The precision polishing system for fatigue test pieces mounted on a cylindrical grinding machine according to claim 1, wherein the clamping device is a clamping plate, and the clamping plate is clamped at the top end of the grinding wheel protective cover through a clamping bolt, so that the cantilever structure is clamped on the cylindrical grinding machine; the polishing slurry is silicon carbide slurry or corundum slurry.
4. The precision polishing system of claim 1, wherein the cantilever structure determines the exact angular disposition of links i, ii and iii based on the specific contact location of the gas drum with the fatigue specimen.
5. A polishing method using the precision polishing system for a fatigue specimen mounted on a cylindrical grinding machine according to any one of claims 1 to 4, characterized by comprising the specific processing steps of:
step one: clamping the clamping device on the grinding wheel protective cover, mounting the tail ends of the frame and the adjustable elastic device on the clamping device, and mounting a cantilever structure;
step two: the front end of the adjustable elastic device, the polishing main shaft and the polishing slurry recoverer are arranged on a cantilever structure, and the cantilever structure is fixed according to the specific contact position of the polishing gas drum and the fatigue sample;
step three: after the installation is finished, polishing the ground fatigue test sample, closing all machines after the polishing is finished and the requirement is met, loosening bolts of the cantilever structure, loosening the front end with adjustable elasticity, lifting the whole cantilever structure upwards, and placing the whole cantilever structure on a grinding wheel cover, so that the grinding process of the next fatigue test sample is not affected;
step four: after the grinding and polishing processing of all the fatigue test samples is finished, the system can be disassembled and stored.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810317527.5A CN108312021B (en) | 2018-04-10 | 2018-04-10 | Fatigue sample precision polishing system and method mounted on cylindrical grinding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810317527.5A CN108312021B (en) | 2018-04-10 | 2018-04-10 | Fatigue sample precision polishing system and method mounted on cylindrical grinding machine |
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| CN108312021A CN108312021A (en) | 2018-07-24 |
| CN108312021B true CN108312021B (en) | 2023-05-16 |
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| CN102139468A (en) * | 2011-01-08 | 2011-08-03 | 荆州恒隆汽车零部件制造有限公司 | Convenient and practicable multi-step excircle polishing machine |
| CN102825543B (en) * | 2012-09-18 | 2014-09-03 | 厦门大学 | Air bag polishing head for air bag polishing |
| CN102862119B (en) * | 2012-09-25 | 2015-04-08 | 宝钢发展有限公司 | Stretching sample outer circle polishing grinding tool capable of being clamped on horizontal lathe |
| CN202985317U (en) * | 2012-11-01 | 2013-06-12 | 深圳市深丰泰模具有限公司 | Six-axis linkage numerical control polisher |
| CN203019168U (en) * | 2012-12-27 | 2013-06-26 | 娄底市文昌科技有限公司 | Centerless grinding machine with self-adaptive function |
| CN103128663B (en) * | 2013-02-01 | 2015-09-23 | 厦门大学 | Air bag polishing tool trimmer |
| CN104191152B (en) * | 2014-08-06 | 2016-08-31 | 陕西天元智能再制造股份有限公司 | A kind of hydraulic cylinder piston rod or the repairing reproduction method of middle rank cylinder outer surface |
| CN205096954U (en) * | 2015-10-15 | 2016-03-23 | 武汉三宇机械有限公司 | Soot blower barrel automatic sander |
| CN206066235U (en) * | 2016-08-22 | 2017-04-05 | 侯马市威创动力机械有限公司 | Diameter of axle in-process measuring instrument during bent axle polishing grinding |
| CN107234508A (en) * | 2017-07-21 | 2017-10-10 | 贵州大学 | One kind is used for cylinder infundibulate fatigue testing specimen automatic grinding and burnishing device |
| CN208163352U (en) * | 2018-04-10 | 2018-11-30 | 山东大学 | A kind of precise polished system of fatigue testing specimen being installed on cylindrical grinder |
-
2018
- 2018-04-10 CN CN201810317527.5A patent/CN108312021B/en active Active
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