CN112338643B - Longitudinal and oblique polishing method for abrasive cloth flap wheel - Google Patents
Longitudinal and oblique polishing method for abrasive cloth flap wheel Download PDFInfo
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- CN112338643B CN112338643B CN202011173582.5A CN202011173582A CN112338643B CN 112338643 B CN112338643 B CN 112338643B CN 202011173582 A CN202011173582 A CN 202011173582A CN 112338643 B CN112338643 B CN 112338643B
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- abrasive cloth
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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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention provides a longitudinal and oblique polishing method of an abrasive cloth flap wheel, which comprises the steps of selecting an abrasive cloth flap wheel with a certain specification, measuring the unfolding radius at the working rotating speed, and determining the working radius range of the abrasive cloth flap wheel according to the original radius and the unfolding radius. And defining the polishing mode of the abrasive cloth flap wheel according to the included angle formed by the cutter shaft direction of the abrasive cloth flap wheel and the feeding direction. And controlling the polishing line spacing according to the contact line bandwidth. The method provided by the invention adopts a longitudinal or oblique polishing mode, avoids a large amount of overlapping of abrasive particle cutting areas, and improves the uniformity of material removal in the direction perpendicular to the abrasive particle movement direction. And the maximum polishing line spacing is reasonably controlled according to the contact line bandwidth, so that the generation of polishing surface ripples is avoided. Compared with the traditional transverse polishing, the method disclosed by the invention greatly improves the polishing effect.
Description
Technical Field
The invention belongs to the technical field of metal polishing processing, and particularly relates to a longitudinal and oblique polishing method of an abrasive cloth flap wheel.
Background
The abrasive cloth vane wheel is a cylindrical polishing tool made of a certain number of rectangular abrasive belt vanes which are rolled on a polypropylene mandrel through resin glue at a certain angle, and the surface of a workpiece is polished by the rotationally opened abrasive belt vanes. The polishing tool is small in size, easy to connect and widely applied to hand-held tool polishing and numerical control polishing; the abrasive cloth flap wheel has flexibility after being rotated and unfolded and can be attached to a complex profile to a certain extent; when rotating, the fan effect is provided for heat dissipation and chip removal; the specification and variety of the abrasive cloth flap wheel are complete, the variety and the granularity of the abrasive cloth base material and the abrasive material can be selected according to the material and the state of the surface to be processed so as to achieve the satisfactory processing effect, and the abrasive cloth flap wheel can be used for grinding and polishing various metal workpieces.
In the process of polishing the surface of a workpiece by using an abrasive cloth flap wheel as a polishing abrasive tool, a transverse polishing method is generally adopted to enable the abrasive cloth flap wheel to move perpendicular to the axial direction of the abrasive cloth flap wheel. And transversely polishing to form polishing rows with the same height as the abrasive cloth flapwheel and uniform coverage. However, the feeding direction is consistent with the cutting direction of the abrasive particles during transverse polishing, and as the linear speed of the abrasive cloth flap wheel is far greater than the feeding speed during polishing, the cutting tracks of a limited number of abrasive particles are overlapped in a large quantity, so that polishing traces generated along the motion direction of the abrasive particles are deeper, the material removal on the surface of a workpiece is uneven along the direction vertical to the motion direction of the abrasive particles, and the surface roughness is relatively high. The transverse polishing usually requires a plurality of abrasive cloth page wheels with different grain sizes to polish in a multi-step mode so as to enable the surface of the workpiece to achieve low surface roughness.
Disclosure of Invention
The technical problem solved by the invention is as follows: the polishing method aims to solve the problems that the existing transverse polishing method is obvious in polishing lines, poor in consistency of surface roughness of the workpiece surface in all directions and multiple in polishing steps. The invention provides a longitudinal and oblique polishing method for an abrasive cloth flap wheel, which is characterized in that the abrasive cloth flap wheel moves one part in a direction perpendicular to the motion direction of abrasive particles by a longitudinal and oblique feeding method, so that the uniformity of material removal on the surface of a workpiece in all directions is ensured. The polishing quality of the abrasive cloth flap wheel used as a grinding tool is improved.
The technical scheme of the invention is as follows: a longitudinal and oblique polishing method for abrasive cloth vane wheels is characterized by comprising the following steps:
step 1: determining the specification of the abrasive cloth vane wheel, selecting the abrasive cloth vane wheel according to the characteristics of a workpiece to be polished, and defining the original radius of the abrasive cloth vane wheel as R1 and the height as H; measuring the unfolding radius of the abrasive cloth vane wheel at the working rotating speed as R2;
step 2: determining the working radius of the abrasive cloth vane wheel, determining the flexibility range of the abrasive cloth vane wheel as (R1, R2) according to the original radius R1 and the unfolding radius R2 of the abrasive cloth vane wheel, and selecting the working radius as R3 from (R1, R2);
and step 3: determining a polishing mode, and selecting a longitudinal or oblique polishing mode in order to obtain better polishing quality;
and 4, step 4: the contact region width W is calculated from the working radius R3 and the deployment radius R2,
further calculating the contact line bandwidth B by combining the contact area height H and the polishing mode angle theta,
B＝H×|sinθ|+W×|cosθ|
controlling the maximum polishing line spacing according to the contact line bandwidth B;
and 5: and compiling a polishing program according to the working radius of the abrasive cloth flap wheel and the polishing line spacing, and polishing the workpiece.
The further technical scheme of the invention is as follows: the working radius R3 is (R1+ R2)/2.
The further technical scheme of the invention is as follows: in the step 4, the polishing line spacing is controlled to be less than one fourth of the contact line bandwidth B
The further technical scheme of the invention is as follows: in the step 2, defining tau as the cutter shaft direction of the abrasive cloth page wheel, defining f as the feeding direction of the abrasive cloth page wheel, recording the included angle formed by the tau and the f along the anticlockwise direction as theta, and determining that the theta belongs to [0,360 DEG); the polishing mode of the abrasive cloth flap wheel is divided into transverse polishing, longitudinal polishing and oblique polishing according to an included angle theta formed by the cutter shaft direction of the abrasive cloth flap wheel and the feeding direction.
The further technical scheme of the invention is as follows: when theta is equal to 90 degrees or 270 degrees, the cutter shaft direction is vertical to the feeding direction, and the polishing mode is called transverse polishing; when theta is 0 degree or 180 degrees, the cutter shaft direction is parallel to the feeding direction, and the polishing mode is called longitudinal polishing; in other cases, the cutter shaft direction is neither parallel nor perpendicular to the feed direction, and is called oblique throwing.
Effects of the invention
The invention has the technical effects that: the invention relates to a method for polishing an abrasive cloth flap wheel longitudinally and obliquely, which determines the working radius range of the abrasive cloth flap wheel according to an original radius and a maximum expansion radius. The polishing mode of the abrasive cloth flap wheel is defined according to the included angle formed by the cutter shaft direction of the abrasive cloth flap wheel and the feeding direction, and a longitudinal or oblique polishing method is adopted, so that the problems of obvious polishing traces and poor material removal consistency in all directions caused by the fact that a large number of abrasive particle cutting tracks are overlapped are solved. And controlling the polishing line spacing according to the contact line bandwidth, so that the polishing lines are uniformly overlapped. Compared with the traditional transverse polishing method, the method can quickly reduce the surface roughness of the workpiece, reduce the polishing steps and improve the quality of the polished surface.
Drawings
FIG. 1 is a schematic view of three radii of an abrasive cloth vane wheel in contact with a flat surface.
FIG. 2 is a top view of an abrasive cloth flap wheel coupled to a knife bar.
FIG. 3 is a schematic diagram of the coordinate system established when the polishing mode is defined according to the included angle between the cutter shaft direction and the feeding direction.
FIG. 4 is a schematic diagram of three polishing modes defined according to the range of the included angle θ.
FIG. 5 is a schematic diagram showing the distribution of the cutting path of a single abrasive particle in different polishing modes according to the method of the present invention.
FIG. 6 is a schematic diagram of the contact line bandwidth under different polishing modes according to the method of the present invention.
Fig. 7 shows the results of measuring the surface morphology and the surface roughness Ra of a titanium alloy workpiece in different polishing modes obtained by applying the method of the present invention, wherein the graph (a) shows the results of horizontal polishing with θ being 90 °, the graph (b) shows the results of oblique polishing with θ being 140 °, and the graph (c) shows the results of vertical polishing with θ being 180 °.
Detailed Description
Referring to fig. 1-7, this embodiment is a method of polishing abrasive cloth page wheels longitudinally and diagonally. The method for polishing the metal workpiece comprises the following steps:
step 1: determining the specification of the abrasive cloth flap wheel, referring to fig. 1 and 2, selecting the abrasive cloth flap wheel with an original radius R1 and a height H according to the characteristics of a workpiece to be polished, selecting the abrasive cloth flap wheel with a conventional size in the market as far as possible under the condition of no special requirements such as openness limitation and the like, and measuring the expansion radius R2 of the abrasive cloth flap wheel at the working rotating speed (usually selected at 5000-10000 rpm);
step 2: determining the working radius of the abrasive cloth vane wheel, determining the flexible range (R1 and R2) of the abrasive cloth vane wheel according to the original radius R1 and the unfolding radius R2 of the abrasive cloth vane wheel, and selecting the working radius R3 in the flexible range to ensure that the abrasive cloth vane wheel works in the flexible range, wherein R3 is (R1+ R2)/2 generally, and the three radii of the abrasive cloth vane wheel are shown in FIG. 1;
and step 3: determining a polishing mode, as shown in FIG. 3, wherein tau is the cutter shaft direction of the abrasive cloth flap wheel, f is the feeding direction of the abrasive cloth flap wheel, and the included angle formed by the tau and f along the counterclockwise direction is theta, and then theta belongs to [0,360 DEG ]. When theta is equal to 90 degrees or 270 degrees, the cutter shaft direction is vertical to the feeding direction, and the polishing mode is called transverse polishing; when theta is equal to 0 degree or 180 degrees, the cutter shaft direction is parallel to the feeding direction, and the polishing mode is called longitudinal polishing; in other cases, the direction of the cutter shaft is neither parallel to nor perpendicular to the feed direction, which is called oblique polishing, and three polishing modes determined according to the theta range are shown in fig. 4. Under the three polishing modes, as shown in fig. 5, which is a schematic diagram of a simulated cutting track of a single abrasive particle on the surface of a workpiece in the same time, it can be seen that, because the linear velocity (about 4-6 m/s) of the abrasive cloth flap wheel is far greater than the feeding velocity (about 0.003 m/s) during polishing, the cutting areas of the abrasive particles overlap in a large amount under the transverse polishing mode. During longitudinal or oblique polishing, due to the existence of axial partial motion along the abrasive cloth flap wheel, the cutting tracks of the abrasive particles are dispersed. The distribution of the cutting tracks of the abrasive particles directly influences the polishing quality, and in comparison with the traditional transverse polishing mode, the number of the abrasive particles passing through a unit area is more during longitudinal polishing or oblique polishing and the roughness value of a polished surface is smaller, so that the longitudinal polishing or oblique polishing mode is selected to improve the polishing quality.
And 4, step 4: the contact row bandwidth is calculated for controlling the maximum polishing row spacing. As shown in FIG. 6, H is the abrasive cloth wheel height, i.e., contact area height, W is the contact area width defined by the unwind radius R2 and the run radius R3,
b is the contact line width, calculated from H, W and the polish form angle θ, B ═ hxxi sin θ | + wxxi cos θ |. In order to ensure good overlapping effect between polishing rows, the polishing row spacing is controlled to be less than one fourth of the contact row bandwidth B.
And 5: and compiling a polishing program according to the working radius and the polishing line spacing of the abrasive cloth flap wheel, and polishing the workpiece.
By applying the abrasive cloth flap wheel longitudinal and oblique polishing method, under the same other conditions, a certain titanium alloy test block is subjected to a polishing test, and the obtained results are shown in fig. 7, wherein fig. 7(a) shows a transverse polishing result of theta 90 degrees, fig. 7(b) shows an oblique polishing result of theta 140 degrees, and fig. 7(c) shows a longitudinal polishing result of theta 180 degrees.
Claims (3)
1. A longitudinal and oblique polishing method for abrasive cloth vane wheels is characterized by comprising the following steps:
step 1: determining the specification of an abrasive cloth vane wheel, selecting the abrasive cloth vane wheel according to the characteristics of a workpiece to be polished, defining the original radius of the abrasive cloth vane wheel as R1, the height as H, and the height of the abrasive cloth vane wheel, namely the height of a contact area, and measuring the expansion radius of the abrasive cloth vane wheel at the working rotating speed as R2;
step 2: determining the working radius of the abrasive cloth vane wheel, determining the flexibility range of the abrasive cloth vane wheel as (R1, R2) according to the original radius R1 and the unfolding radius R2 of the abrasive cloth vane wheel, and selecting the working radius as R3 from (R1, R2);
and step 3: determining a polishing mode, and selecting a longitudinal or oblique polishing mode in order to obtain better polishing quality; defining tau as the cutter shaft direction of the abrasive cloth page wheel, f as the feeding direction of the abrasive cloth page wheel, recording the included angle formed by the counterclockwise direction of tau and f as theta, and then enabling theta to be belonged to [0,360 DEG ]; the polishing mode of the abrasive cloth flap wheel is divided into transverse polishing, longitudinal polishing and oblique polishing according to an included angle theta formed by the cutter shaft direction of the abrasive cloth flap wheel and the feeding direction;
and 4, step 4: the contact region width W is calculated from the working radius R3 and the deployment radius R2,
further calculating the contact line bandwidth B by combining the contact area height H and the polishing mode angle theta,
B＝H×|sinθ|+W×|cosθ|
controlling the maximum polishing line spacing according to the contact line bandwidth B; when theta is equal to 90 degrees or 270 degrees, the cutter shaft direction is vertical to the feeding direction, and the polishing mode is called transverse polishing; when theta is 0 degree or 180 degrees, the cutter shaft direction is parallel to the feeding direction, and the polishing mode is called longitudinal polishing; in other cases, the cutter shaft direction is neither parallel nor perpendicular to the feeding direction, which is called inclined throwing;
and 5: and compiling a polishing program according to the working radius and the polishing line spacing of the abrasive cloth flap wheel, and polishing the workpiece.
2. The method for longitudinally and diagonally polishing an abrasive cloth wheel according to claim 1, wherein in step 2, the working radius R3 is (R1+ R2)/2.
3. The method of claim 1 wherein in step 4, the polishing row spacing is controlled to be less than one quarter of the contact row width B.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011173582.5A CN112338643B (en) | 2020-10-28 | 2020-10-28 | Longitudinal and oblique polishing method for abrasive cloth flap wheel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011173582.5A CN112338643B (en) | 2020-10-28 | 2020-10-28 | Longitudinal and oblique polishing method for abrasive cloth flap wheel |
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| CN112338643A CN112338643A (en) | 2021-02-09 |
| CN112338643B true CN112338643B (en) | 2022-06-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275122A (en) * | 2011-09-01 | 2011-12-14 | 西北工业大学 | Numerical control polishing method for profile of blade of integrated blade disk |
| CN103894905A (en) * | 2014-04-01 | 2014-07-02 | 西北工业大学 | Numerical-control polishing method for air inlet and outlet edges of blade |
| CN104786166A (en) * | 2015-04-29 | 2015-07-22 | 郑州久晟研磨材料有限公司 | Three-surface abrasive cloth grinding page wheel |
| CN206084639U (en) * | 2015-05-08 | 2017-04-12 | 阿库机械制造有限公司 | A processing unit for detaching machine of burr of surface form work piece |
| JP2017077587A (en) * | 2015-10-19 | 2017-04-27 | 株式会社松田製作所 | Polishing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20121795U1 (en) * | 2000-04-10 | 2003-05-08 | Lundum Poul | sanding belt |
| DE20319366U1 (en) * | 2003-12-13 | 2004-03-11 | Jakob Löwer Inh. von Schumann GmbH & Co. KG | Continuous grinding machine for processing a flat workpiece surface |
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2020
- 2020-10-28 CN CN202011173582.5A patent/CN112338643B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275122A (en) * | 2011-09-01 | 2011-12-14 | 西北工业大学 | Numerical control polishing method for profile of blade of integrated blade disk |
| CN103894905A (en) * | 2014-04-01 | 2014-07-02 | 西北工业大学 | Numerical-control polishing method for air inlet and outlet edges of blade |
| CN104786166A (en) * | 2015-04-29 | 2015-07-22 | 郑州久晟研磨材料有限公司 | Three-surface abrasive cloth grinding page wheel |
| CN206084639U (en) * | 2015-05-08 | 2017-04-12 | 阿库机械制造有限公司 | A processing unit for detaching machine of burr of surface form work piece |
| JP2017077587A (en) * | 2015-10-19 | 2017-04-27 | 株式会社松田製作所 | Polishing device |
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| CN112338643A (en) | 2021-02-09 |
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