KR101179149B1 - pressure meter for hydraulic chuck - Google Patents

Abstract

PURPOSE: A device for testing a hydraulic chuck is provided to obtain stability during operation by easily and precisely measuring the purge pressure of the hydraulic chuck. CONSTITUTION: A device for testing a hydraulic chuck comprises a press reacting member, a displacement shaft(50), and a display member(60). The pressure reacting member is inserted into a contraction socket, thereby contracting with the contraction socket. The displacement shaft is linearly moved by a contracting action of the pressure acting member. The display member indicates an amount of the linear motion of the displacement shaft. The pressure reacting member comprises a collet being integrated with a main body. A contraction space of a tapered shape is formed in the inside of the main body. The collet is composed of bushes formed on the outer circumference of the main body.

Description

Hydraulic meter chuck {pressure meter for hydraulic chuck}

The present invention relates to a hydraulic chuck inspection device for confirming a stable tool fixed state in using a hydraulic chuck.

Hydraulic chucks are generally applied to machine tools to serve as a kind of adapter for cutting tool mounting.

As shown in FIG. 1, the hydraulic chuck 10 includes a shank portion 12 and a holder portion 14 formed on one side of the shank portion 12 and a shrinking socket 16 embedded in the holder portion 14.

The shrink socket 16 has a structure that forms a pressurized chamber 16a filled with hydraulic oil between the outer circumferential surface and the inner circumferential surface of the holder portion 14.

One side of the holder portion 14 is formed with a control chamber (14a) for adjusting the pressure of the working oil, the control chamber (14a) is provided with a control bolt 141 for adjusting the pressure of the pressure chamber (16a) have.

In the case where the tool T is mounted on the hydraulic chuck 10, after the tool T is inserted into the shrink socket 16, the adjusting bolt 141 is operated in the pressing direction to operate the hydraulic oil in the adjusting chamber 14a. By pressing the pressure change in the control chamber 14a is to be transmitted to the pressure chamber 16a.

Therefore, the inner diameter of the contraction socket 16 is contracted by this pressure change, so that the tool T inserted into the contraction socket 16 is firmly gripped.

On the contrary, when the mounted tool T is to be removed, the adjustment bolt 141 is operated in the decompression direction to drop the pressure on the hydraulic oil in the adjustment chamber 14a, thereby reducing the hydraulic pressure of the pressure chamber 16a. Since the inner diameter of the contraction socket 16 is lowered to be lowered, the tool T may be separated from the contraction socket 16.

On the other hand, the hydraulic chuck 10 has to be formed very firmly in the grip state for the tool (T) due to the use characteristics of rotating at high speed, in order to satisfy such a gripping condition, the pressure chamber 16a of the shrink socket 16 The holding oil pressure, i.e., the gripping pressure, to be transmitted above) should be formed above the minimum reference value, and the gripping pressure above the reference value should be maintained while using the tool T.

Therefore, in using the hydraulic chuck 10, it is necessary to check whether the gripping pressure of the shrink socket 16 is stably formed before the tool T is mounted and operated. In addition, it is important to check beforehand to avoid the risk of problems during operation.

However, at present, since there is no technology capable of accurately measuring the holding pressure of the hydraulic chuck 10, a problem arises because the holding pressure is not properly formed or the holding pressure is not properly formed due to leakage of hydraulic oil. Cannot be grasped in advance.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an inspection device for a hydraulic chuck to ensure the operational stability of the hydraulic chuck by easily measuring the gripping pressure of the hydraulic chuck.

The hydraulic chuck inspection device according to the present invention provided to achieve the above object is inserted into the contraction socket of the hydraulic chuck and the pressure reaction means to be contracted with the contraction socket, displacement shaft which is linearly moved by the contraction action of the pressure reaction means, And display means for numerically indicating the linear momentum of the displacement shaft.

The pressure reaction means includes an integral collet in the form of a pipe consisting of a main body portion forming a tapered contraction space therein and a bush portion formed on an outer circumferential surface of the main body portion.

The integral collet is a straight line extending in the longitudinal direction from the outer surface side to the inner surface side of the main body portion, it may be made of a structure having a slitting line formed to fall short of the front end of the main body portion.

The integrated collet may be formed in a straight shape extending through the outer surface and the inner surface of the main body and extending in the longitudinal direction of the main body, and having a slitting line formed to fall short of the front end of the main body.

The integrated collet may be formed in a structure having a slitting line which is formed to be opened to the front side of the main body part in a form that is dug from the inner surface of the main body portion to the outer surface side and varies in proportion to the thickness of the main body portion. have.

The integrated collet may be formed in a structure having a slitting line which is formed to be opened to the front side of the main body part in a form that is dug from the outer surface of the main body to the inner surface side and the depth of the main body varies in proportion to the thickness of the main body part. have.

In the present invention, the pressure reaction means is a plurality of blocks combined with each other to form a tapered contraction space, the elastic member is provided between each block to give an elastic force in the direction of extending the interval between each block, It may include a combination collet composed of an elastic tube to wrap each block so that the combination of each block is not broken.

The combined collet is provided in the contraction space and includes a reaction bead whose position varies depending on the volume change of the contraction space.

In the present invention, the pressure reaction means is a plurality of narrow plate is combined to form a tapered-shaped contraction space, the end of the narrow plate is adjacent to the corrugated collet of the form alternately connected alternately It can be made, including.

The displacement shaft may be configured to be separated from the body portion and the body portion and replaceable pin portion.

The display means includes a display means composed of a sensing pin moving in a linear direction and a dial mechanism for displaying the movement of the sensing pin.

The present invention is provided in the handle holder and the handle holder for movably supporting the displacement shaft in a state in which the body portion of the displacement shaft and the sensing pin of the display means are in contact with the elastic shaft to the contraction space side with respect to the displacement shaft It includes a spring to be applied.

According to the present invention as described above, it is possible to accurately and easily measure the gripping pressure of the hydraulic chuck has the advantage that it is possible to ensure the operational stability prior to the use of the hydraulic chuck.

1 is a schematic cross-sectional view showing the main part configuration of a general hydraulic chuck.
Figure 2 is an exploded perspective view showing the structure of the inspection device for a hydraulic chuck equipped with an integral collet in the present invention.
Figure 3a, 3b is a perspective view and a longitudinal cross-sectional view showing the form of the integral collet to which the outer closed slitting line is applied in the present invention.
Figure 4a, 4b is a perspective view and a longitudinal cross-sectional view showing the form of the integral collet to which the through-closed slitting line is applied in the present invention.
Figures 5a, 5b is a perspective view and a longitudinal cross-sectional view showing the form of the integral collet to which the inner open slitting line is applied in the present invention.
6a and 6b are a perspective view and a longitudinal cross-sectional view showing the form of an integral collet to which the outer open slitting line is applied in the present invention.
7 is an exploded perspective view showing the structure of the inspection device for a hydraulic chuck equipped with a combination collet in the present invention.
8A and 8B are a perspective view and a longitudinal sectional view showing the structure of the combined collet in the present invention.
Figure 9 is a perspective view showing the form of the corrugated collet applied to the present invention.
10 is a perspective view showing a separate displacement shaft applied to the present invention.
11 is a perspective view showing a coupling relationship between the hydraulic chuck and the inspection device for an integrated chuck in the present invention.
Figure 12a, 12b is an exemplary cross-sectional view showing a state in which the inspection device for the hydraulic chuck equipped with an integrated collet in the present invention is coupled to the hydraulic chuck to operate.
13 is a perspective view showing a coupling relationship between the hydraulic chuck and the inspection device for a hydraulic chuck equipped with a combination collet in the present invention.
Figure 14a, 14b is an exemplary cross-sectional view showing a state in which the inspection device for a hydraulic chuck equipped with a combination collet in the present invention is coupled to the hydraulic chuck to operate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 14B.

As shown in FIG. 2, the inspection apparatus for a hydraulic chuck according to the present invention measures the pressure reaction means, the displacement shaft 50 linearly moved by the contracting action of the pressure reaction means, and the linear movement amount of the displacement shaft 50. It comprises a display means 60 represented by.

The pressure reaction means includes a collet forming a contraction space therein, the collet may be formed in various forms such as an integrated collet 20 or a combined collet 30 (see FIG. 7) according to its structure. have.

 The integrated collet 20 is composed of a main body portion 22 forming a tapered contraction space 20a therein and a bush portion 24 formed on an outer circumferential surface of the main body portion 22.

The main body portion 22 is formed with a plurality of slitting lines to facilitate the contraction action, the slitting line can be made in the form of the outer closed type, through closed type, the inner open type, the outer open type and the like according to the shape. have.

As shown in FIGS. 3A and 3B, the outer closed slitting line 22a is a straight line extending in the longitudinal direction from the outer surface side of the body portion 22 to the inner surface side and extending in the longitudinal direction, and the front surface of the body portion 22. It falls short of the front end.

As shown in FIGS. 4A and 4B, the through-closed slitting line 22b is a straight line extending through the outer surface and the inner surface of the body portion 22 and extending in the longitudinal direction of the body portion 22, and the body portion 22. It falls short of the front end of the car.

As shown in FIGS. 5A and 5B, the inner open slitting line 22c is recessed from the inner surface of the body portion 22 to the outer surface side, and the depth of the inner portion of the slitting line 22c varies in proportion to the thickness of the body portion 22. It is made to open to the front side of the part 22.

As shown in FIGS. 6A and 6B, the outer open slitting line 22d is hollowed out from the outer surface of the body portion 22 to the inner surface side, and the depth that is proportionally dug in accordance with the thickness of the body portion 22 varies. It is made to open to the front side of the part 22.

The front end of the body portion 22 of the unitary collet 20 is equipped with a stopper 201 to prevent foreign matter from flowing into the contraction space (20a), the stopper 201 is the body portion 22 It is made of elastic material so that it is not resistant to shrinkage operation.

As shown in FIGS. 7 to 8B, the combination collet 30 is provided between a plurality of blocks 32 which are combined with each other to form a tapered contraction space 30a, and between each block 32. An elastic member 321 for imparting an elastic force in the direction of extending the interval between the 32, an elastic tube 34 surrounding the respective blocks 32 to prevent the combination of the respective blocks 32 from being broken, and the contraction It comprises a reaction beads 36 provided in the space (30a).

Here, the respective blocks 32 will be described in the same manner as the base material, which was originally formed in one circumferential form, is divided into four equal parts in the longitudinal direction.

Each of the blocks 32 is elastic in the state in which the blocks 32 are spaced apart from each other because they are elastically wrapped in the elastic tube 34 while receiving the elastic force in the direction in which the distance between each other is extended by the elastic member 321. It is to maintain the elastically in close contact with the inner surface of the tube (34).

The front end of the elastic tube 34 is equipped with a stopper 341 to prevent foreign matter from entering the block 32 side.

Meanwhile, in the present invention, as the pressure reaction means, various types of collets may be used in addition to the above-described integrated collet 20 and the combined collet 30, and as shown in FIG. 9, a plurality of narrow widths are illustrated. The plates 42 are combined and arranged in a cylindrical shape, and may also be formed of so-called corrugated collets 40 in which the ends of the narrow plates 42 adjacent to each other are alternately alternately connected.

In addition, the displacement shaft 50 is composed of a body portion 52 and a pin portion 54 formed at one side of the body portion 52 to be joined to the contraction space of the collet, as shown in FIG. 10. 50 may be configured in a form in which the body portion 52 and the pin portion 54 is integral (see FIGS. 2 and 7) or may be configured in a form in which the body portion 52 and the pin portion 54 are separated.

When the body portion 52 and the pin portion 54 are configured in a separated form, only the pin portion 54 may be replaced and used according to the type of collet or the shape of the contraction space.

In addition, the body portion 52 of the displacement shaft 50 is preferably formed in the form consisting of a flat portion 521 on one side, according to the air between the body portion 52 and the inner surface of the handle holder 70 Since a sufficient gap is formed so that the displacement shaft 50 is operated in the handle holder 70, the air in the handle holder 70 can not be pushed out to the outside and is pressed to operate the displacement shaft 50. The disturbing phenomenon is prevented.

The display means 60 comprises a sensing pin 62 moving in a linear direction and a dial mechanism 64 for displaying the movement of the sensing pin 62. As the display means 60, for example, a standard product In dial gauge can be used.

 The sensing pin 62 of the display means 60 passes through the gauge holder 72 mounted at the tip of the cylindrical handle holder 70 and is inserted into one side of the handle holder 70 so that It is in contact with the front end of the body portion 52, it is fixed by a screw pin 721 inserted from the side of the gauge holder 72.

In the handle holder 70, a spring 74 interposed between the gauge holder 72 and the displacement shaft 50 to apply an elastic repulsive force to the tip of the body portion 52 of the displacement shaft 50. Is mounted.

The pressure reaction means is mounted on the front end of the handle holder 70 on the opposite side of the display means 60. In the case of the integral collet 20, the bush 24 is fitted to the handle holder 70 and the main body ( 22 is a mounting form protruding to the outside, in the case of the combination collet 30, one end of the elastic tube 34 in which the block 32 is embedded is combined with a separate bush 38, the bush 38 ) Is mounted in the form that is fitted to the handle holder (70).

Referring to the operation of the inspection device for a hydraulic chuck according to the present invention configured as described above are as follows.

First, when the integral collet 20 is applied as the pressure reaction means, the main body portion 22 of the integrated collet 20 in the loose state of the hydraulic chuck 10 as shown in Figure 11 of the hydraulic chuck 10 It is inserted into the shrink socket 16.

In this case, as shown in FIG. 12A, the displacement shaft 50 has a pin portion 54 formed in the contracted space 20a of the integrated collet 20 and is shot against the body portion 52 between the gauge holder 72. It is in the state pressed by the spring 74 which exerts a force.

After inserting the main body portion 22 of the integral collet 20 into the shrink socket 16, the hydraulic chuck 10 is operated in a tightened state. In the tightened state, the inner circumferential surface of the shrink socket 16 and the holder portion 14 are tightened. As the hydraulic fluid flows into the pressure chamber 16a therebetween, the shrink socket 16 is contracted.

As shown in FIG. 12B, as the contraction socket 16 is contracted, the body portion 22 of the unitary collet 20 inserted therein is also contracted. The body unit 22 of the unitary collet 20 is also contracted. Due to the nature of the slitting line, the shrinkage is relatively smooth at an evenly proportional ratio (the shrinkage pressure due to the shrinking socket is indicated by an arrow in the drawing for clarity).

Accordingly, the shrinkage space 20a of the body portion 22 of the integrated collet 20 is also reduced in volume, and the shrinkage space 20a is formed due to the characteristics of the pin portion 54 in the tapered shape of the shrinkage space 20a. By displacing the displacement shaft 50 is pushed to one side, the position of the displacement shaft 50 is moved to the gauge holder 72 side.

At this time, the spring 74 interposed between the gauge holder 72 and the displacement shaft 50 is elastically compressed due to the movement of the displacement shaft 50 toward the gauge holder 72.

Accordingly, the sensing pin 62 of the display means 60 in contact with the displacement shaft 50 is moved by the displacement shaft 50, and the dial mechanism 64 measures the movement of the sensing pin 62. Will be displayed as.

After the measurement of the tightening state of the hydraulic chuck 10 is completed, the hydraulic chuck 10 is returned to the released state, and then the main body part 22 of the integrated collet 20 is released from the shrink socket 16. The main body portion 22 separated from the shrink socket 16 is expanded and returned to its original state.

In addition, the spring 74, which has been elastically compressed between the displacement shaft 50 and the gauge holder 72, is also elastically expanded to its original state to push the displacement shaft 50 toward the contraction space 20a, thereby displacing the displacement shaft 50. The pin portion 54 is returned to the initial state that is matched to the contraction space (20a).

Even when the combined collet 30 is applied as a pressure reaction means, the combined collet 30 is inserted into the contraction socket 16 of the hydraulic chuck 10 in the released state of the hydraulic chuck 10 as shown in FIG. 13. .

At this time, as shown in Figure 14a, each block 32 of the combination type collet 30 is in a state in which the distance between each other by the elastic member 321 is expanded, the pin portion 54 of the displacement shaft 50 is a contraction space ( It is inserted into 30a) and in contact with the reaction beads 36.

As shown in FIG. 14B, when the hydraulic chuck 10 is switched to the tightened state and the contraction socket 16 is contracted, each block 32 of the combined collet 30 inserted into the contraction socket 16 is an elastic member. While compressing 321, so-called shrinkage displacement is performed in a direction in which the gap between them is narrowed.

Therefore, the contraction space 30a formed by the combination of each block 32 is also reduced in volume, and the reaction ball 36 is moved to one side due to the characteristics of the contraction space 30a having a tapered shape, and the displacement shaft ( 50) is also pushed by the reaction bead 36, the position of the displacement shaft 50 is moved to the gauge holder 72 side, the dial mechanism 64, as described above, the movement of the sensing pin (62) It will be displayed numerically.

When the combined collet 30 including the reaction bead 36 is applied, the pin portion 54 of the displacement shaft 50 is in contact with the reaction bead 36 so that the displacement shaft 50 is pushed by the reaction bead 36. Therefore, the pin portion 54 and the contraction space 30a of the displacement shaft 50 do not need to be precisely matched.

As described above, according to the present invention, since the amount of shrinkage, that is, the gripping pressure, of the shrinking socket 16 can be easily recognized numerically in the tightened state of the hydraulic chuck 10, it is displayed on the dial mechanism 64 of the display means 60. If the value is less than the reference value it can be seen that the holding pressure of the hydraulic chuck 10 is weaker than the normal value.

10: hydraulic chuck 14: holder portion 16: shrink socket
20: integral collet 20a: contraction space 22: main body
24: bush portion 30: combination collet 30a: shrinkage space
32: block 321: elastic member 34: elastic tube
36: reaction ball 50: displacement shaft 52: body portion
54: pin 60: display means 62: sensing pin
64: dial mechanism 70: handle holder 74: spring

Claims (13)

A pressure reaction means inserted into the contraction socket of the hydraulic chuck and contracted together with the contraction socket,
A displacement shaft linearly moved by the contracting action of the pressure reaction means;
Display means for numerically representing the linear momentum of the displacement shaft
It is made, including;

The pressure reaction means
It comprises an integral collet in the form of a pipe consisting of a body portion forming a tapered contraction space therein and a bush portion formed on an outer circumferential surface of the body portion.
Hydraulic chuck inspection device characterized in that.
delete The method of claim 1,
The unitary collet is
It is a straight line extending in the longitudinal direction, which is dug at a predetermined depth from the outer surface side to the inner surface side of the main body portion, consisting of a structure with a slitting line formed to fall short of the front end of the main body portion
Hydraulic chuck inspection device characterized in that. The method of claim 1,
The unitary collet is
A straight line penetrating the outer surface and the inner surface of the body portion and extending in the longitudinal direction of the body portion, and having a slitting line formed to fall short of the front end of the body portion.
Hydraulic chuck inspection device characterized in that.
The method of claim 1,
The unitary collet is
It has a structure with a slitting line which is formed to be open to the front side of the main body portion is different in depth in proportion to the thickness of the main body portion is formed in the form of the inner surface from the inner surface of the main body portion.
Hydraulic chuck inspection device characterized in that.
The method of claim 1,
The unitary collet is
It has a structure with a slitting line which is formed to be opened to the front side of the main body portion is different in depth in proportion to the thickness of the main body portion is formed in the form of the inner surface side from the outer surface of the main body portion.
Hydraulic chuck inspection device characterized in that.
The method of claim 1,
The pressure reaction means
A plurality of blocks combined with each other to form a tapered contraction space,
An elastic member provided between the blocks to impart an elastic force in a direction extending the distance between the blocks;
Elastic tube to wrap each block so that the combination of each block is not broken
Hydraulic chuck inspection device comprising a combination collet consisting of.
The method of claim 7, wherein
The combination collet is
Reaction ball provided in the contraction space is changed in position depending on the volume change of the contraction space
Hydraulic chuck inspection device comprising a.
The method of claim 1,
The pressure reaction means
A plurality of narrow plates are combined to form a tapered contraction space, the inspection device for a hydraulic chuck comprising a corrugated collet of the form in which the ends of the narrow plate adjacent to each other are alternately connected to each other.
The method of claim 1,
The displacement shaft is
Consisting of a body part and a replaceable pin part separately configured from the body part
Hydraulic chuck inspection device characterized in that.
The method of claim 1,
The display means
It comprises a display means consisting of a sensing pin moving in a linear direction, and a dial mechanism for displaying the movement of the sensing pin,
Wherein the display means is arranged so that the sensing pin is in contact with the displacement shaft in contact with the displacement shaft
Hydraulic chuck inspection device characterized in that.
The method of claim 11,
A handle holder for movably supporting the displacement shaft while the body portion of the displacement shaft and the sensing pin of the display means are in contact with each other.
Hydraulic chuck inspection device comprising a.
The method of claim 12,
A spring provided in the handle holder to apply elastic pressure to the contraction space with respect to the displacement shaft;
Hydraulic chuck inspection device comprising a.

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