JPH065808U - Chuck noise reduction device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce noise when blowing chips with air blowing force. [Structure] An air ejection hole 6 is provided in the vicinity of a claw body 4 provided on a chuck body 1 and a work temporary placing table 5, and cutting chips attached to the claw body 4 and the like by air ejected from the air ejection hole 6 In a chuck designed to blow away
By forming the opening of the air ejection hole 6 by a plurality of nozzle holes 7a having a small diameter and ejecting the air from these nozzle holes 7a, it is possible to reduce noise at the time of air ejection without lowering the air blow force. it can.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an air blow noise reduction device for removing chips and the like adhering to a chuck.

[0002]

[Prior art]

 Some conventional machine tools are provided with a chuck for clamping a work. The chuck generally has three claws that can move in the radial direction, and clamps the end of the work to be machined between these claws. Is also done. If chips generated during the machining of a workpiece adhere to the claws, the workpiece to be machined next will be incompletely clamped or cannot be centered. Therefore, as shown in Figs. When attaching the work b to the chuck body a, a plurality of air ejection holes d are provided in the work temporary placing table c on which the end of the work b is placed and in the vicinity thereof, and air is ejected from these ejection holes d. By doing so, chips and dust adhering to the nail body e are removed.

[0003]

[Problems to be solved by the device]

 However, the conventional air ejection hole d has a structure in which a hole of about φ3 is provided in the workpiece temporary placing table c and its vicinity, so that a large noise is generated when the air is ejected from these ejection holes d, There was a problem that deteriorated the work environment. The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to provide a chuck noise reduction device that reduces noise generated when air is ejected from an ejection hole.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, this invention provides an air ejection hole in the vicinity of a claw body provided on a chuck body and a temporary work stand, and the air ejected from the air ejection hole causes the claw body to be attached to a claw body or the like. In a chuck that blows off adhered chips and the like, the openings of the air ejection holes are formed by a plurality of nozzle holes having a small diameter.

[0005]

[Work]

 Since the noise when air is ejected from the nozzle holes can be reduced without reducing the air blow force due to the above configuration, the working environment can be improved.

[0006]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. 3 is a sectional view of the chuck body, FIG. 4 is a front view thereof, FIG. 5A is an enlarged sectional view around the air ejection holes, and FIG. 5B is a front view thereof. In these figures, reference numeral 1 is a chuck body provided on a machine tool (not shown), and a center 3 is provided at the center of the chuck body. The center 3 is fitted in a center hole 2a formed in the end surface of the workpiece 2 to be machined. Reference numeral 4 denotes three claws provided on the front surface of the chuck body 1, which are provided at equal intervals in the circumferential direction around the center 3 and are movable in the radial direction by a drive mechanism (not shown). ing.

Reference numeral 5 denotes a work temporary placing table that is provided between the claw bodies 4 so that the ends of the work 2 to be clamped between the claw bodies 3 can be placed on the work temporary placement table. As shown in FIG. 4, a plurality of air ejection holes 6 are opened on the front surfaces of the temporary placing table 5 and the chuck body 1. These air ejection holes 6 are connected to an air supply source (not shown) through the passages 1a, 5a formed in the chuck body 1 and the workpiece temporary placing table 5, and the air ejection holes opened on the front surface of the chuck body 1 The air ejected from the holes 6a causes chips or the like to adhere to the work temporary placing table 5, and the air ejected from the air ejecting holes 6b formed on the front surface of the work temporary placing table 5 causes the nail 4 to reach the nail body 4. It is designed to blow off adhered cutting chips.

A plug 7 that reduces noise is fitted in the air ejection hole 6. The plug 7 has a columnar shape as shown in FIGS. 5A and 5B, and has a plurality of nozzle holes 7a penetrating both end surfaces thereof. In the above-mentioned embodiment, the case where four φ1.5 nozzle holes 7a are formed is shown. Further, although the plug 7 is fitted in the air ejection hole 6 in the above embodiment, the air ejection hole 6 itself may be constituted by a plurality of nozzle holes 7a.

Next, the operation will be described. When the workpiece 2 to be machined is attached to the chuck body 1, air is ejected from the air ejection holes 6 and the chips and the like adhering to the pawl 4 and the workpiece temporary placing table 5 in the pre-machining are blown off by the air. Since the air ejection hole 6 is formed by the plurality of nozzle holes 7a having a small diameter, noise when air is ejected can be significantly reduced.

In order to confirm the noise reduction effect, the following test was conducted. FIG. 6 shows a test device for performing a test, in which factory air regulated by a regulator 10 is supplied to a passage 11, and an orifice plate in which a nozzle hole 7a is changed in shape in front of the passage 11. 12 is detachably attached. In addition, a stand 13 is provided in front of the nozzle hole 7a, and a washer 14 is placed on the stand 13 to confirm the air blow force.

The washer 14 has a diameter of 48 × t6 and a weight of 63 g and is used by adhering a plurality of sheets with an adhesive. As a test method, a regulator 10 is used for the case of using the conventional orifice plate 12 having a φ3 drilled hole and a case of using the orifice plate 12 having a plurality of nozzle holes 7a of the present invention. The air pressure was raised, and the number of blown out washers 14 for each air pressure and the noise measurement at a position 500 mm away from the nozzle hole 7a were measured. The results are shown in Table 1 below and FIG. 7.

[0012]

[Table 1]

As is clear from Table 1 and FIG. 7, it was confirmed that the noise can be reduced by about 4 dB between the conventional device and the device of the present invention, although the difference in air blowing force is small. . Since the air blow force required to actually blow off chips is sufficient to blow one or two washers, the air force for practical use should be 0.5 kg / cm _2. Become. The above is the description of the noise test when the washer 13 is blown off by the air blow force. The results of the noise test when the wall surface 14 is in front of the nozzle hole 7a as shown in FIG. 8 are shown below. It shows in Table-2 and FIG.

[0014]

[Table 2]

Even in this case, it was confirmed that noise of 3 dB to 4 dB can be reduced as compared with the conventional one, so that the noise generated when the work is carried in can be reduced.

[0016]

[Effect of device]

 As described in detail above, the present invention has an air blowout hole formed by a plurality of small nozzle holes for blowing out air for blowing off chips and the like adhering to the chuck jaws, etc. It is possible to reduce noise at the time of air ejection without lowering the noise. As a result, the working environment can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing a conventional chuck.

FIG. 2 is a sectional view showing a conventional chuck.

FIG. 3 is a sectional view of a chuck according to an embodiment of the present invention.

FIG. 4 is a front view of a chuck according to an embodiment of the present invention.

5 (a) is an enlarged view within the X circle of FIG. 3. FIG. (B) It is an arrow view from the Y direction of FIG.

FIG. 6 is an explanatory diagram of a test device.

FIG. 7 is a diagram showing test results.

FIG. 8 is an explanatory diagram showing another test method.

FIG. 9 is a diagram showing test results.

[Explanation of symbols]

1 ... Chuck body, 4 ... Claw body, 5 ... Temporary work stand, 6
... Air ejection hole, 7a ... Nozzle hole.

Claims (1)

[Scope of utility model registration request] 1. An air ejection hole 6 is provided in the vicinity of a claw body 4 provided on a chuck body 1 and a temporary work placing table 5, and the air ejected from the air ejection hole 6 adheres to the claw body 4 and the like. In a chuck that blows off chips and the like, the opening of the air ejection hole 6 is provided with a plurality of nozzle holes 7 having a small diameter.
A noise reduction device for a chuck formed by a.