KR100787864B1 - Chattering vibration preventing jig - Google Patents

Abstract

A chattering vibration preventing jig is provided to prevent chattering vibration during machining of a workpiece by using magnets. A chattering vibration preventing jig(10) includes a bolt(12) and a jig body(11). The bolt has a head with a first magnet(121). The jig body has a male screw thread of the bolt and a female screw thread mated to the male screw thread. The jig body has a second magnet(111) mounted on one end thereof facing an opening of the female screw thread. The chattering vibration preventing jig has a length which is adjustable through the screw thread. The first magnet and the second magnet are sucked at predetermined points to support a workpiece and prevent chattering vibration.

Description

Chattering vibration prevention jig {CHATTERING VIBRATION PREVENTING JIG}

1 is a configuration diagram of a first embodiment of the present invention.

2a and 2b is a perspective view and a bottom view showing the configuration of the jig body of FIG.

3A and 3B are a perspective view and a plan view showing the configuration of the bolt of Figure 1;

4 is a perspective view showing the configuration of the fixing nut of FIG.

5 is an explanatory diagram showing a state of use of the first embodiment of the present invention;

6 is a configuration diagram of a second embodiment of the present invention.

7 is a configuration diagram of a third embodiment of the present invention.

** Explanation of symbols for main parts of drawings **

10: Chattering vibration prevention jig 11: Jig body

111: magnet 12: bolt

121: magnet 122: tofu

123: thread portion 13: fixing nut

20: Chattering vibration prevention jig 21: First jig main body

211: magnet 22: second jig body

221: magnet 21, 24: fixing nut

25: screw member 251: gripping portion

30: Chattering vibration prevention jig 31, 32: Bolt

311 and 321: magnets 312 and 322: screw sections

33, 34: fixing nut 35: screw member

50: workpiece 100: machine tool

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for preventing chattering vibrations generated when machining a workpiece using a machine tool, and more particularly to preventing chattering vibrations generated when machining a workpiece of a metallic material. JIG is for.

In general, when cutting or polishing a workpiece using various machine tools, a so-called chattering vibration occurs in the workpiece due to the force acting on the workpiece of the tool.

When the workpiece vibrates minutely by such chattering vibration, not only an unpleasant sound is generated but also adversely affect the machining precision.

Thus, various countermeasures against such chattering vibration have been taken.

For example, Japanese Patent Laid-Open No. 7-276175 [Patent Document 1], Japanese Patent Laid-Open No. 7-22774 [Patent Document 2], and Japanese Patent Laid-Open No. 2004-66362 [Patent Document 3] include such chattering vibrations. Measures to prevent this are suggested.

Patent Document 1 proposes an elastic member jig inserted into a hollow cylindrical workpiece to prevent chattering vibration, and Patent Document 2 discloses an elastic member jig inserted into a cylindrical workpiece to absorb and dampen chattering vibration. Magnet rubber is proposed.

In addition, Patent Document 3 proposes a support apparatus for preventing chattering vibration by applying a preliminary pressure to the vicinity of a machined part of a workpiece.

However, the said patent documents 1 and 2 are the measures which assumed the case where a workpiece is cylindrical shape, and it cannot apply to the case of workpieces other than cylindrical shape. And the chattering vibration damping method using the elasticity of the elastic member is difficult to sufficiently suppress the occurrence of chattering.

In addition, Patent Document 3 requires a fixed support device and a support device following it, and has a disadvantage in that the device configuration is complicated and costs are increased.

The present invention has been developed to solve the above-mentioned drawbacks of the present invention, while effectively preventing chattering vibrations generated during the machining of a workpiece by a machine tool with a simple configuration, and can be applied to workpieces of various shapes. An object of the present invention is to provide a ring vibration preventing jig.

In order to solve the above problems, the chattering vibration preventing jig of the present invention is

Chattering vibration prevention jig which is installed to prevent chattering vibration which occurs when machining a workpiece using a machine tool.The bolt with the first strong magnet installed on the cross section of the head, and the female thread that matches the male thread of the bolt It has a jig main body provided with a second strong magnet in the cross section facing the opening of the female screw, and the length can be adjusted by rotating the screw, and the first and second strong magnets are moved to a predetermined position. It is characterized by suppressing chattering vibration by adsorbing to and supporting the workpiece.

In addition, the chattering vibration preventing jig of the present invention,

Chattering vibration prevention jig which is installed to prevent chattering vibration which occurs when machining a workpiece using a machine tool.A female thread is formed on the inner end face and the other side facing the opening of the female thread is formed. A first jig body provided with 1 strong magnet, a second jig body provided with a female thread on the other end face and a second strong magnet provided on the other end face of the female thread, and the first jig A first male screw that fits the female screw of the main body and a second male screw that fits the female screw of the second jig body are formed and provided with a screw member connecting the first jig body and the second jig body. It is possible to adjust the length by rotating, and at the same time to absorb the first and second strong magnets in a predetermined place to hold the workpiece to suppress chattering vibration It is characterized by.

In addition, the chattering vibration preventing jig of the present invention,

Chattering vibration prevention jig which is installed to prevent chattering vibration generated when machining a workpiece using a machine tool.A first strong magnet is installed on one end face and female or male thread is formed on the other end face. A second jig body having a first jig body, a second strong magnet provided at one end face and an inverted screw of a female or male thread on the other end face, the first jig body and the second A screw member for connecting the jig main body is provided with a screw member formed with an inverted screw of the female thread or the male thread of the first jig main body at one end surface to rotate the screw and to adjust the length thereof, and the first and second It is characterized in that the chattering vibration is suppressed by adsorbing the strong magnet at a predetermined place to support the workpiece.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a diagram showing a chattering vibration preventing jig 10 according to a first embodiment of the present invention.

As shown in this figure, the chattering vibration preventing jig 10 includes a jig body 11, a bolt 12, and a fixing nut 13. In addition, a strong permanent magnet 111 is installed in the lower part of the jig body 11, and a strong permanent magnet 121 is also installed in the upper part of the bolt 12.

2 is a view showing the configuration of the jig body 11, FIG. 2A is a perspective view and FIG. 2B is a bottom view.

The jig body 11 is formed in a cylindrical shape of steel, and a screw thread is formed on the upper surface of the jig main body 11 to a predetermined depth in the opening of the female screw 112. In addition, a strong columnar permanent magnet 111 is buried in the lower surface of the jig body 11 by resin bonding. The surface magnetic flux density of the permanent magnet used in the present example is 250 mT [Milli Terrace = 2.5 kG (kilo gauss)], and the adsorption force is 7.5 kG.

Further, the permanent magnet 111 is disposed so that the surface of the magnet is positioned at the position where the surface of the permanent magnet 111 is also enclosed with resin and 0.1 mm (retracted) from the bottom surface of the jig body 11. Therefore, the magnet can be prevented from directly colliding with the workpiece and broken.

Although not shown in the figure, the columnar permanent magnet 111 may be buried and assembled by fastening members such as bolts in a ring shape.

In addition, the bottom edge of the jig body 11 is rounded.

The size of the jig body 11 is a cylindrical shape of diameter 50mm, height 70mm, the diameter of the female screw 112 is 25mm, the permanent magnet 111 is a cylindrical shape of 25mm diameter, 10mm in height.

2 is a view showing the configuration of the bolt 12, FIG. 3A is a perspective view, and FIG. 3B is a plan view.

The bolt 12 has a steel head 122 and a threaded portion 123, and a threaded thread is formed in the threaded portion 123. In addition, a strong columnar permanent magnet 121 having an adsorption force of 7.5 kG is buried and fixed on the upper surface of the head 122 by resin bonding. In addition, the surface of the permanent magnet 121 is also wrapped with a resin, and the permanent magnet 121 is disposed so that the surface of the magnet is positioned at a position 0.1 mm (retracted) from the top surface of the head 122.

Although not shown in the drawing, the cylindrical permanent magnet 121 may be buried and assembled by fastening members such as bolts in a ring shape.

In addition, a hole for a clamping device is formed around the head 122. When the jig 10 is disposed, a wrench or the like is inserted into this hole to tighten it.

In addition, the upper edge of the head 122 is rounded. In the present embodiment, the head 122 has a cylindrical shape having a diameter of 45 mm and a height of 20 mm, and the threaded portion 123 has a diameter of 25 mm and a length of 55 mm. Permanent magnet 121 has a diameter of 25mm and a cylindrical shape of 5mm in height.

4 is a perspective view showing the configuration of the fixing nut 13. The fixed nut 13 made of steel has a cylindrical shape having a diameter of 45 mm and a height of 15 mm, and is formed by penetrating the opening of the female screw 131 having a diameter of 25 mm from the upper surface to the lower surface. In addition, the fixing nut 13 has a hole for the clamping device.

In addition, as shown in FIG. 1, the fixing nut 13 is fitted until it passes through the opening of the female thread 131 of the threaded portion 123 of the bolt 12. The female thread of the jig body 11 is engaged with the front end side.

In the chattering vibration preventing jig 10 having the above-described configuration, a screw is formed by adjusting a distance between the bottom surface of the jig body 11 and the top surface of the bolt 12, that is, the length of the jig, like the screw turning the bolt 12 by turning. It can be rotated and changed to suit the situation of the place where the jig is installed. In addition, after setting the length of the jig to a predetermined length, the fixing nut 13 is moved while rotating along the threaded portion 123 to fix the jig body 11 at a position in contact with the jig main body 11, thereby preventing the chattering vibration prevention jig 10. The length can be fixed securely.

The configuration of the chattering vibration preventing jig 10 has been described above, but the use of the chattering vibration preventing jig 10 will be described.

5 is a view showing a state of use of the chattering vibration prevention jig 10. As shown in this figure, the chattering vibration preventing jig 10 is used for processing such as cutting and polishing the workpiece 50 by the machine tool 100.

The machine tool 100 is provided with a tool 101 for contacting the machining surface to perform cutting and polishing, and the tool 101 moves the carrier table 103 in the front-rear direction as indicated by the arrow A in the drawing. By moving, the workpiece 50 can be moved relative to the tool 101.

This embodiment illustrates the operation | work which plane-processes the surface of the steel plate 51 of the work table which is the workpiece | work 50 with the machine tool 100 precisely. Although the steel plate has a thickness of 10 mm, when the tool 101 contacts the steel plate while rotating at high speed, the steel plate makes a noise and vibrates up and down, that is, chattering vibration occurs.

So, in this embodiment, as shown in FIG. 5, the chattering vibration prevention jig 10 with strong permanent magnets installed in both ends is supported between the carrier table 103 and the back surface of the iron plate 51 of the workpiece 50. As shown in FIG. Sweet like a stick In addition, in this use mode, since the length of the chattering vibration preventing jig 10 is short, the support 110 of the rectangular steel tube made of steel is provided as a spacer on the carrier table 103, and the upper surface and the iron plate 51 are separated from each other. Chattering vibration prevention jig 10 was installed in between. Since the support 110 of the square tube is very heavy and is integrally mounted with the carrier on the carrier table 103, the chattering vibration prevention jig 10 is installed directly on the carrier table even when the supporter 110 is placed. Can produce the same effect as

Next, the installation method of the chattering vibration prevention jig 10 in a present Example is demonstrated. First, the workpiece 50 is installed on the carrier table 103 of the machine tool 100.

At this time, the workpiece 50 is firmly fixed on the carrier table 103 by the clamp 107.

Subsequently, a jig 10 for preventing chattering vibration is installed. In this embodiment, the length of the chattering vibration preventing jig 10 is shorter than the distance from the upper surface of the carrier table 103 to the steel plate 51 to be machined. Therefore, the chattering vibration preventing jig 10 is installed via the support 110. Therefore, first, the support base 110 is installed on the carrier base 103, and the chattering vibration preventing jig 10 is placed on the upper surface of the support base 110 with the face of the magnet 111 of the jig main body 11 face down. Is installed. At this time, the axial length of the jig 10 can be adjusted by rotating the bolt 12 and the jig main body 11 relatively (screw turning). It should be installed shorter than the distance to 51).

After the jig 10 is installed on the support 110, the bolt 12 is rotated to raise the bolt 12 so that the magnet 121 is connected to the bottom surface of the iron plate 51. Finally, a small wrench is inserted into the clamp hole in the head 122 to rotate the bolt 12 until the iron plate 51 is firmly attached. Thus, the upper surface and the lower plate of the support plate 110 is crushed at both ends of the jig 10 like a brace rod.

Finally, the fixing nut 13 is rotated and transferred in the direction of the jig main body 11 to be in contact with the jig main body 11 to be hardened. The jig body 11 is firmly adsorbed and fixed to the support 110 by the strong permanent magnet 111, and the bolt 12 is also firmly adsorbed and fixed to the lower surface of the iron plate 51 by the strong permanent magnet 121. Therefore, the jig main body 11 and the bolt 12 are relatively rotated by the vibration at the time of machining by this powerful magnetic force, thereby preventing the axial length of the chattering vibration preventing jig 10 from changing. If the fixing nut 13 is tightened and fixed again, the loosening of the screw is prevented by the adsorption of the strong magnets, and the loosening of the screw can be more firmly prevented.

In addition, in this embodiment, four chattering vibration prevention jig | tools 10 are arrange | positioned in total, The place and the number which are arrange | positioned take the predetermined number suitable for the predetermined place where chattering vibration may occur in consideration of the shape of a workpiece. Install chattering vibration prevention jig.

As described above, the installation mode has been described in detail. As described above, the chattering vibration preventing jig 10 having powerful magnets at both ends is disposed between the carrier table 103 and the steel plate 51 as a work piece. ) Can significantly suppress chattering vibration caused by driving while pushing the steel plate. Since the chattering vibration preventing jig 10 is fixed to the bottom wall of the iron plate 51 by pressure and adsorption, it not only prevents the iron plate 51 from bending down, but also the iron plate 51 by the adsorption force of the strong magnet. It is pulled downward and prevents the iron plate from bending upwards.

If chattering vibration is generated during processing, even if the surface is polished, fine irregularities are formed on the surface of the workpiece, so that the desired flatness cannot be obtained. According to this embodiment, chattering vibration can be largely suppressed. Flatness of 탆 can be obtained.

In addition, according to the present embodiment, both the upper end face and the lower end face of the chattering vibration preventing jig are firmly absorbed by the workpiece and the carrier table by the strong magnet, so that the bolt and the jig main body rotate relatively due to the vibration during machining. The loosening does not cause the jig to shorten the battlefield. Conventionally, only the fixing nut prevents the screw from loosening. However, in the present embodiment, the screw is also prevented from being loosened by the suction force of the magnets provided at both ends. Therefore, the screw is loosened due to the vibration at the time of machining, so that the pressure action on the workpiece by the jig becomes insufficient, and there is no problem that the chattering movement cannot be suppressed.

In addition, in this embodiment, the edge of the both ends which are the workpiece | work of a jig and the adsorption surface to a conveyance base are formed in the round surface, and the burden of disassembly operation | work can be alleviated while tilting a jig when removing the jig installed by adsorption.

The present embodiment can be modified in various ways without departing from the spirit of the present invention. For example, the shape and size of the chattering vibration preventing jig can be appropriately changed.

The use of the jig in the present embodiment is not limited to the above-described use, but the chattering vibration prevention jig can be used in various forms in which chattering vibration must be suppressed. For example, in the above embodiment, the chattering vibration preventing jig is provided with the jig main body 11 downward and the bolt 12 upward, but the same effect can be obtained even if the jig body 11 is installed upside down.

In addition, in this embodiment, since the distance of the upper surface of the conveyance stand 103 and the lower surface of the iron plate 51 which is a workpiece | work is out of the range of the application length of the jig 10, the chattering vibration prevention jig 10 and the conveyance stand 103 of Arranged as a device to space the support 110 therebetween, but if the distance between the portion to support the workpiece by the jig 10 and the carrier 103 is within the range of the application length of the jig 10 support 110 You can place the jig directly without the). In addition, various devices can be used to space the gap, and any metal heavy material that adsorbs magnets can be used. And several devices like this can be piled up and used.

In addition, in this embodiment, the chattering vibration prevention jig is applied to the planar processing of the steel plate of a work bench, but the shape of a workpiece is not limited to a steel plate, of course. In addition, one end of the chattering vibration preventing jig is sucked on the back side of the steel plate, but the location of adsorbing one end of the jig is not limited thereto, and if it is properly adsorbed in a position that can effectively suppress the chattering vibration according to the shape of the workpiece. do.

Subsequently, a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6 illustrates a chattering vibration preventing jig 20 according to a second embodiment. Referring to this, the chattering vibration preventing jig 20 includes a first jig body 21 and a second jig body 22. , Fixing nuts 23 and 24, and a screw member 25.

The cylindrical first and second jig bodies 21 and 22 have the same configuration as the jig main body 11 of the first embodiment, each having an opening having female threads engraved at one end thereof and a permanent magnet at the other end thereof. 211) and 221 are embedded by resin bonding. However, as will be described later, the female screw of the second jig body 22 is formed of the female screw for an inverted (reverse) screw. The fixing nuts 23 and 24 also have the same configuration as the fixing nut 13 of the first embodiment.

In addition, as shown in the first embodiment of the present invention, the columnar permanent magnets 211 and 221, although not shown in the drawing, may be assembled in a ring shape such as bolts and embedded to be buried.

The screw member 25 is engraved with the thread of the male thread, and the direction of screwing up and down is reversed with the electric field adjusting gripping portion 251 interposed therebetween. That is, the lower half of the full-length steering gripping portion 251 in the drawing is formed with a conventional right screw (turned to the right), and the screw head is turned inward when the screw is turned clockwise with the spiral portion facing forward. That is, to be sinned.

On the contrary, the upper half of the electric field adjusting gripping portion 251 in the drawing is formed with a left screw (reverse screw, turned to the left), and when the screw head is turned clockwise with the spiral side facing forward, it comes out and comes loose.

The chattering vibration preventing jig 20 configured as described above adsorbs the workpiece to one end where the permanent magnet is installed in order to prevent the occurrence of chattering vibration when processing the workpiece as in the first embodiment. The other end provided is attracted to a conveyance table (or a device which stands in between), and is arrange | positioned.

In addition, when the chattering vibration preventing jig 20 is fixed like a brace bar, the electric field is lengthened by holding the electric field adjusting gripping portion 251 of the screw member 25 and turning it in one direction. This is because, as described above, the screw member 25 of the chattering vibration preventing jig 20 according to the present embodiment has a reverse direction in which the screw is wound up and down (left and right).

According to the present embodiment, the same effects as those of the first embodiment can be obtained, and they are valuablely used when a long chattering vibration preventing jig is required. In addition, in the first embodiment, when the bolt and the jig main body are relatively rotated after adsorbing both ends of the jig to lengthen the overall length of the jig, it is necessary to rotate the bolt or the jig main body against the adsorption force of the magnet. In this embodiment, since the female screw is provided in both the 1st and 2nd main body, the 1st and 2nd main body adsorb | sucked to a predetermined | prescribed place rotates a screw member in the direction which extends the jig length as it is fixed by adsorption and fixing. In other words, it is possible to extend the overall length of the jig with a small rotation.

Next, a third embodiment which is a modified example of the second embodiment will be described.

FIG. 7 is a view showing the configuration of the chattering vibration preventing jig of the third embodiment. Referring to this, the chattering vibration preventing jig 30 includes a first jig main body (bolt) 31 and a second jig main body (bolt). ), Fixing nuts (33, 34) and screw member (35).

The first jig main body 31 has the same configuration as that of the bolt of the first embodiment, and a strong permanent magnet 311 is provided on the lower side thereof, and a male screw 312 is formed on the upper side thereof.

The second jig main body 32 has a strong permanent magnet 321 is provided on the upper surface, the inverted external thread 233 is formed on the lower surface.

In addition, an upside opening of the female screw is engraved on the upper surface of the screw member 35, and an opening of the female screw is engraved on the lower surface of the other. By the chattering vibration prevention jig 30 of such a structure, the effect similar to the said 2nd Embodiment can be acquired.

As mentioned above, although the 1st and 2nd embodiment was demonstrated in detail, embodiment of this invention is not limited to the said embodiment, A various deformation | transformation is possible within the range which does not deviate from the meaning of this invention.

For example, in the above embodiment, a strong magnetic magnet having a surface magnetic flux density of 25 mT and an adsorption force of 7.5 kG is used as a strong permanent magnet, but a magnet having suitable performance can be used. However, it is preferable to use a strong magnet with a suction force of 4kg or more to firmly adsorb the jig to the workpiece and the conveyer to suppress the occurrence of chattering vibration. In the present embodiment, a cylindrical magnet is used, but the shape of the permanent magnet is not limited to the circumference, but may be a footnote or a ring.

In addition, in the said embodiment, although the chattering vibration prevention jig whose shape of the electric field is columnar was demonstrated, of course, the chattering vibration prevention jig of other shape of a columnar shape is also good. In addition, the workpiece to which the chattering vibration preventing jig is applied is not limited to a workbench, but can be applied to various workpieces, and is not limited to flat machining but also applicable to various kinds of machining such as cutting and polishing. Of course.

As described above, by using the chattering vibration preventing jig according to the present invention, chattering vibration can be prevented with respect to a workpiece having various shapes.

Claims (4)

Chattering vibration prevention jig which is installed to prevent chattering vibration which occurs when machining a workpiece using a machine tool,  A bolt having a first strong magnet installed in the cross section of the head, The male body of the bolt and a female thread corresponding thereto are formed, and a jig main body having a second strong magnet installed at a cross section facing the opening of the female screw is provided. A chattering vibration preventing jig, wherein the chattering vibration is suppressed by allowing the screw to be adjusted in length and adsorbing the first and second strong magnets to a predetermined place to support the workpiece. Chattering vibration prevention jig which is installed to prevent chattering vibration which occurs when machining a workpiece using a machine tool, A first jig body in which a female screw is formed at one end face and a first strong magnet is installed at the other end face facing the opening of the female screw, A second jig body in which a female thread is formed at one end face and a second strong magnet is installed at the other end face facing the opening of the female screw; A screw member connecting the first jig main body and the second jig main body in which a first male thread matching the female thread of the first jig body and a second male thread matching the female thread of the second jig body are formed; Equipped with A chattering vibration preventing jig, wherein the chattering vibration is suppressed by allowing the screw to be adjusted in length and adsorbing the first and second strong magnets to a predetermined place to support the workpiece. The method of claim 2, A chattering vibration preventing jig, wherein the female screw of the second jig body and the second male screw of the screw member are inverted screws. Chattering vibration prevention jig which is installed to prevent chattering vibration which occurs when machining a workpiece using a machine tool, A first jig body in which a first strong magnet is provided at one end face and a female thread or a male thread is formed at the other end face; A second jig body in which a second strong magnet is installed at one end face and a female screw or an upside down screw is formed at the other end face; A screw member for connecting the first jig body and the second jig body, the female screw of the first jig body or the male screw of the first jig body or the male screw is formed at one end thereof, and the second jig body of the second jig body is formed at the other end. With a male or female threaded member that matches a male or female threaded inverted screw, A chattering vibration preventing jig, wherein the chattering vibration is suppressed by allowing the screw to be adjusted in length and adsorbing the first and second strong magnets to a predetermined place to support the workpiece.

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