KR20170055140A - Low vibration hand grinder - Google Patents
Low vibration hand grinder Download PDFInfo
- Publication number
- KR20170055140A KR20170055140A KR1020150157945A KR20150157945A KR20170055140A KR 20170055140 A KR20170055140 A KR 20170055140A KR 1020150157945 A KR1020150157945 A KR 1020150157945A KR 20150157945 A KR20150157945 A KR 20150157945A KR 20170055140 A KR20170055140 A KR 20170055140A
- Authority
- KR
- South Korea
- Prior art keywords
- main body
- vibration
- hydraulic chamber
- grinding
- grinding wheel
- Prior art date
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Classifications
-
- 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
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
The present invention relates to a low-vibration hand grinder capable of effectively absorbing vibrations generated by a grinding operation, capable of stable grinding work, and capable of reducing an operator's fatigue due to vibration.
Generally, a hand grinder is a device that performs various types of machining operations by connecting a polishing pad of various sizes to a rotating body (for example, a rotor) that rotates by supplying high-pressure air or electricity, and by using a high rotational force and a frictional force.
Examples of the use of such a hand grinder include not only the surface finishing of welding parts in shipbuilding and heavy industry, the finishing of metal casting, the surface processing of aluminum die casting, but also the removal of inclined metal surface or protrusion, It is also used for finishing finishing work such as contour molding, calibration and fusion.
The hand grinder for this purpose is ergonomically designed for precise work so that the worker should not be fatigued even when used for a long time and the tool must be light in weight so that the worker can work on the hand for finer work. .
In addition, in order to increase the precision of the machined part, the rotating part must be rigid enough to prevent vibration and be made to have high rotation accuracy.
1 shows a conventional general hand grinder.
The conventional hand grinder includes a
An
In the conventional hand grinder having the above-described configuration, the
When the eccentricity of the
Further, the eccentricity of the
In order to solve such a problem, conventionally, a worker wears specially manufactured gloves to prevent the vibration of the equipment itself from being transmitted, or to change the gear type of the
However, in such a conventional method, when the working method or the environment of the grinder is slightly changed, the friction size between the
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to effectively absorb vibrations generated during a grinding operation and a grinding operation through an electro- And to provide a low-vibration hand grinder that enables more active and efficient operation through control.
According to an aspect of the present invention for achieving the above object, there is provided a method of manufacturing a semiconductor device, comprising: a driving unit installed inside a main body of an external shape to transmit a rotational force of a rotor rotated by a power source to one side; And a suction unit installed at a periphery of the main body to absorb and reduce vibrations generated during grinding by the action of hydraulic pressure. The hand grinder according to claim 1, / RTI >
The suction unit includes a connecting portion for rotatably connecting the main body and the main body, and a first hydraulic chamber and a piston head spaced apart from each other in the circumferential direction of the connecting portion, the first hydraulic chamber being formed at a periphery of the connecting portion, May be made of an electronic actuator having a second hydraulic chamber.
Four actuators may be provided on the upper, lower, left, and right sides of the main body.
The piston head may be formed with a fluid passage hole for allowing a working fluid of the second hydraulic chamber to pass to the first hydraulic chamber when the piston head is moved toward the actuator by the pressure of the first hydraulic chamber.
The fluid passage hole may be formed with a check valve that prevents fluid from passing from the first hydraulic chamber to the second hydraulic chamber.
A sensor installed on one side of the main body for measuring a direction and a magnitude of vibration generated during grinding and a controller for controlling the operation of the sucking means by receiving a signal measured from the sensor.
The control unit can control the optimum excitation direction, frequency and pressure of the hydraulic pressure of the suction unit according to the transmission signal of the sensor.
The control unit can determine the representative vibration value calculated by grasping the operator and the main operation characteristics, and can control the absorption unit based on the setting information selected by the operator.
The vibration-free hand grinder of the present invention effectively absorbs vibrations generated during grinding work, thereby stably performing the grinding operation by increasing the reaction speed by the operation of the operator, reducing the fatigue to the operator by the vibration of the grinder, There is an effect that can be prevented.
In addition, the low-vibration hand grinder of the present invention allows the operator to perform a grinding operation in a selected mode by setting a representative vibration value calculated in advance by grasping a worker and major work characteristics, It has the effect of enabling a more efficient grinding operation under various working conditions.
1 is a side sectional view of a conventional hand grinder,
FIG. 2 is a side sectional view showing a hand grinder according to an embodiment of the present invention,
3 is a cross-sectional view showing a cross section taken along line AA in FIG. 2,
Fig. 4 is a cross-sectional view showing a shape of a depressed portion of the depressurizing means shown in Fig. 3;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a low-vibration hand grinder according to the present invention will be described in detail with reference to the accompanying drawings.
Figure 2 shows a side cross-sectional view of a grinder in accordance with an embodiment of the present invention.
The grinder according to the present invention includes a
The
The
For reference, in the description of the present invention, a configuration using compressed air is used as a power source for generating the rotation of the
The
The
FIG. 3 shows a cross-sectional shape of a connecting portion A-A in FIG. 2, and the structure of the above-described sucking means 400 will be described in more detail.
The
The
A plurality of
For example, the
The
The
3,
According to an embodiment of the present invention, a
The control unit is configured to control the optimum excitation direction, frequency, and hydraulic pressure of the
The grinder of the present embodiment configured as described above includes a
Table 1 below shows the magnitude and direction of vibration according to the type of grinder.
Table 1. Vibration size and direction of grinder
As shown in Table 1, most grinders exhibit the largest vibration amplitude between 205 Hz and 800 Hz, and the vibration decreases below 125 Hz. Such vibration magnitude and direction can be changed in direction and size depending on the surface strength and roughness of the polishing surface to be worked.
The grinder according to the present invention can preset the vibration information for each kind of grinder in advance and perform the optimum vibration control by the control unit.
As an example of the grinder operation for such a function, the control unit may be set to the representative vibration value calculated by grasping the operator who operates the grinder and the main operation characteristics. At this time, the simple operation of the grinder can be performed for a predetermined time to set the representative vibration value, and the vibration characteristic according to the magnitude of the force applied by the operator according to the surface type to be polished can be set. This information and the representative vibration value are respectively stored as the setting information of the
As described above, the grinder according to the embodiment of the present invention is provided with the
In addition, it is possible to efficiently control the vibration of the
Therefore, since the grinder is stably operated without rocking, the grinding operation does not generate vibration, so that stable operation can be performed. In addition to this, it is possible to perform precision machining and thereby reduce the fatigue of the operator due to vibration. Solution.
Although the low-vibration hand grinder according to the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.
100:
120: Rotor
200: polishing pad
300:
400: Suction means
410:
420: Actuator
424: Piston head
436: Backflow prevention valve
500: Sensor
Claims (8)
A suction unit 400 installed at the periphery of the main body 300 for absorbing and reducing vibration generated during grinding by the action of hydraulic pressure; Wherein the grinding wheel is a grinding wheel.
The sucking means (400)
A connecting part 410 for rotatably connecting the main body 300 by inserting the main body 300 in an axial direction; And
The first hydraulic chamber C1 formed at the periphery of the connection portion 410 and the second hydraulic chamber C2 defined by the piston head 424 are spaced apart from each other in the circumferential direction of the connection portion 410, An electromagnetic actuator 420 having an electromagnetic actuator 420; Wherein said grinding wheel is a grinding wheel.
Wherein four actuators (420) are provided on the upper, lower, left, and right sides of the main body (300).
When the piston head 424 is moved toward the actuator 420 by the pressure of the first hydraulic chamber C1, the working fluid of the second hydraulic chamber C2 is transferred to the first hydraulic chamber C1 And a fluid passage hole (426) through which the fluid is passed.
Wherein the fluid passage hole (426) is formed with a check valve plate (436) for preventing fluid from passing from the first hydraulic chamber (C1) to the second hydraulic chamber (C2) .
A sensor 500 installed at one side of the main body 300 to measure a direction and a magnitude of vibration generated during a grinding operation; And
A controller receiving the signal measured by the sensor 500 and controlling the operation of the sucking unit 400; Further comprising a second grinding wheel for grinding the grinding wheel.
Wherein the control unit controls the optimum excitation direction, frequency and pressure of the hydraulic pressure of the suction unit (400) according to a transmission signal of the sensor (500).
Wherein the control unit controls the suction unit (400) by setting information representative of a worker and a main operation characteristic and calculating a representative vibration value in advance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150157945A KR20170055140A (en) | 2015-11-11 | 2015-11-11 | Low vibration hand grinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150157945A KR20170055140A (en) | 2015-11-11 | 2015-11-11 | Low vibration hand grinder |
Publications (1)
Publication Number | Publication Date |
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KR20170055140A true KR20170055140A (en) | 2017-05-19 |
Family
ID=59049760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020150157945A KR20170055140A (en) | 2015-11-11 | 2015-11-11 | Low vibration hand grinder |
Country Status (1)
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KR (1) | KR20170055140A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101971922B1 (en) * | 2018-09-19 | 2019-04-24 | 탐코리아 주식회사 | Apparatus for grinding goods with mirror face by electric motor |
KR20200104755A (en) | 2019-02-27 | 2020-09-04 | 황예지 | Assistance device for grinding and grinder including the same |
KR102319659B1 (en) * | 2021-08-06 | 2021-11-01 | 탐코리아 주식회사 | Apparatus for grinding goods with mirror face by pneumatic drive |
-
2015
- 2015-11-11 KR KR1020150157945A patent/KR20170055140A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101971922B1 (en) * | 2018-09-19 | 2019-04-24 | 탐코리아 주식회사 | Apparatus for grinding goods with mirror face by electric motor |
KR20200104755A (en) | 2019-02-27 | 2020-09-04 | 황예지 | Assistance device for grinding and grinder including the same |
KR102319659B1 (en) * | 2021-08-06 | 2021-11-01 | 탐코리아 주식회사 | Apparatus for grinding goods with mirror face by pneumatic drive |
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