JP6376687B2 - Processing machine - Google Patents

Description

The present invention relates to a machining machine.

  2. Description of the Related Art In a processing machine (machine tool) for machining a material such as metal, it is common to provide a soundproofing device for preventing noise caused by machine vibration from leaking to the outside. As a soundproofing device for preventing the propagation of noise, a structure that surrounds a vibration source (noise generating unit) of a machine by covering almost the entire machine as described in Patent Document 1 with a cover is known.

JP 2000-190160 A

  In recent years, in a gear processing machine (hobbing machine) that performs gear cutting while rotating a cutter that processes a gear (hereinafter referred to as a hob cutter), the peripheral speed of the hob cutter tends to increase in order to shorten the processing time. If the generated noise level increases with the increase in the peripheral speed of the hob cutter, there is a possibility that noise exceeding the noise exposure standard value of the operator may be generated.

  As a soundproof structure of a hobbing machine, for example, a pair of plate-like hollow struts fixed to a bed using a fastening member such as a bolt, and a pair of plate-like covers attached to a pair of hollow struts, a vibration source The structure that surrounds is known. The pair of hollow struts are fixed to the upper surface of the hobbing bed with a fastening member such as a bolt.

  With this structure, it was thought that sound leakage inside the hobbing machine could be suppressed. However, in this structure, the inventors, in this structure, generated noise due to vibration of the cover due to machining vibration during gear machining. I found out that it was radiated. That is, it has been found that even if the vibration source is surrounded by the cover, noise is emitted due to the vibration of the cover, so that the soundproofing effect is not exhibited.

This invention aims at providing the soundproof structure that covers the vibration source with the cover, a machining machine that cover Ru can be suppressed emission of noise due to the vibration.

According to the first aspect of the present invention, the processing machine is a machine for processing a workpiece on a bed, and is provided at a position on the outside of the bed in a plan view and supported on a floor surface; possess a top cover surrounding the upper space of the bed is supported on said post, and a connecting member made of damping material for connecting between the bed and the strut, the strut is above the bed A column upper part extending in parallel to the bed, a column lower part arranged parallel to the side surface of the bed, and a column bent part connecting the column upper part and the column lower part spaced apart in plan view, and the connecting member Is arranged between the column bending portion and the bed .

According to such a configuration, since the upper cover and the bed are connected via the coupling member made of a damping material, propagation of vibration from the vibration source of the processing machine to the upper cover is suppressed. Thereby, radiation of noise due to vibration of the upper cover can be suppressed.
Moreover, the support member can be supported in a balanced manner by the connecting member and the floor surface.

The said processing machine is good also as a structure which has the lower cover supported by the said support | pillar and surrounding the circumference | surroundings of the said bed.
According to such a structure, the radiation | emission sound from a bed surface can be suppressed and the radiation | emission of the noise of a processing machine can be reduced more.

  According to the present invention, since the upper cover and the bed are connected via the coupling member made of the damping material, propagation of vibration from the vibration source to the upper cover is suppressed. Thereby, radiation of noise due to vibration of the upper cover can be suppressed.

1 is a perspective view of a processing machine according to a first embodiment of the present invention. It is a perspective view of the processing machine main body of 1st embodiment of this invention. It is sectional drawing of the soundproof structure of 1st embodiment of this invention, Comprising: It is a figure explaining the vibration isolator with a bolt interposed between a hollow support | pillar and a bed. It is sectional drawing of the soundproof structure of 1st embodiment of this invention, Comprising: It is a figure explaining the damping material interposed between a hollow support | pillar and a cover. It is a perspective view of the processing machine of 2nd embodiment of this invention.

(First embodiment)
Hereinafter, a soundproof structure 2 according to a first embodiment of the present invention and a processing machine 1 including the soundproof structure 2 will be described in detail with reference to the drawings. As shown in FIG. 1, the processing machine 1 of this embodiment includes a processing machine main body 3 and a soundproof structure 2 for suppressing noise generated in the processing machine main body 3.

As shown in FIG. 2, the processing machine main body 3 of the present embodiment is a gear processing machine (hobbing machine), a bed 5 that is a rectangular parallelepiped support, a column 6 supported on the bed 5, and a column 6, a saddle 7 supported on the front surface of the head 6, a hob head 8 supported on the saddle 7, a hob cutter 9 attached to the hob head 8, and a counter column 13 disposed to face the column 6. Have.
That is, the bed 5 supports components (hereinafter simply referred to as a vibration source) such as a column 6 that is a vibration source when the workpiece W to be processed is processed, from below.

  The column 6 is supported by the bed 5 so as to be movable in the horizontal X-axis direction. The saddle 7 is supported on the side surface of the column 6 so as to be movable up and down in the vertical Z-axis direction. The hob head 8 is supported so as to be able to turn around a horizontal A-axis and to be movable in the horizontal Y-axis direction. The hob cutter 9 is detachably attached to the hob head 8, and the hob cutter 9 is attached to the hob head 8 so that it can rotate around the horizontal B axis.

  On the front surface of the column 6 on the bed 5, a rotary table 10 is supported so as to be rotatable around a vertical C axis. A mounting jig 11 is detachably attached to the upper surface of the turntable 10, and a workpiece W, which is a material of a gear serving as a product, is detachably attached to the mounting jig 11.

  The counter column 13 is erected on the opposite side of the column 6 across the rotary table 10 on the bed 5. A lifting head 14 is supported on the front surface of the counter column 13 so as to be movable up and down in the Z-axis direction, and a support center 15 is provided at the tip of the lifting head 14. The support center 15 is arranged so that its axis coincides with the C axis. That is, by lowering the support center 15 by the elevating head 14, the workpiece W is rotatably supported between the mounting jig 11 and the support center 15, and the rotary table 10 is rotated in this state. As a result, the workpiece W rotates around the C axis.

  As shown in FIG. 1, the soundproof structure 2 includes a plurality of hollow columns 17 (columns) and a plurality of plate-like covers 22 attached to the hollow columns 17 (upper cover, only the front side is shown in FIG. 1). And an upper surface cover 23. The soundproof structure 2 is a structure that surrounds the space above the bed 5, that is, the space in which components such as the column 6 (see FIG. 2) are arranged from the four sides in the horizontal direction and from above.

  The hollow column 17 is provided at a position on the outside of the bed 5 in plan view. The hollow column 17 is a column that supports the cover 22. A space is formed inside the hollow column 17. In other words, the four sides of the space above the bed 5 connect the pair of hollow plate-like hollow columns 17 disposed so as to face each other with the vibration source interposed therebetween, and the sides of the pair of hollow columns 17. And a pair of covers 22 arranged opposite to each other.

  As shown in FIG. 3, the hollow column 17 includes a hollow column upper part 18 (an upper column) positioned above the upper surface of the bed 5, a hollow column lower part 20 (an column lower part) positioned below the upper surface of the bed 5, and It has a hollow column bending part 19 (column bending part) that connects the hollow column upper part 18 and the hollow column lower part 20. The hollow support | pillar bending part 19 has connected the hollow support | pillar upper part 18 and the hollow support | pillar lower part 20 which are spaced apart by planar view.

The hollow strut upper portion 18 is a hollow plate-like member that extends upward from one side of the upper surface of the rectangular bed 5. The hollow support | pillar upper part 18 is a support | pillar with which space was provided in the inside, and has comprised the square cylinder shape by which the lower part was opened.
The hollow strut lower portion 20 is a hollow plate-like member disposed in parallel with the side surface of the bed 5. The hollow strut lower portion 20 has a rectangular tube shape with a space provided therein, like the hollow strut upper portion 18. The lower end of the hollow strut lower portion 20 is supported by the floor surface F. That is, the hollow column 17 supports its own weight on the floor surface F.

The hollow support | pillar bending part 19 is a site | part which connects the hollow support | pillar upper part 18 and the hollow support | pillar lower part 20, and has space inside.
The internal space of the hollow support | pillar upper part 18, the hollow support | pillar bending part 19, and the hollow support | pillar lower part 20 is formed continuously. Since the space is formed inside the hollow column 17, a cable or a signal line can be routed inside the hollow column 17. That is, the hollow column 17 has a function as a cable duct.

The hollow column bending portion 19 is supported by a plurality (four in the present embodiment) of bolted vibration isolation members 24 (connection members). The vibration isolation member 24 with a bolt is, for example, a columnar vibration isolation member formed of a vibration damping material such as natural rubber, and has a fastening member such as a bolt provided concentrically with the vibration isolation member. .
The vibration isolating member with bolt 24 has an upper surface and a lower surface, and the upper surface of the vibration isolating member with bolt 24 is fixed to the hollow column bending portion 19 and the lower surface of the vibration isolating member is fixed to the upper surface of the bed 5. The support column 17 is supported. In other words, the hollow support column 17 is supported on the upper surface of the bed 5 via a bolt vibration isolating member 24 that is a vibration damping material.

  The vibration damping material constituting the bolted vibration isolating member 24 is a material that reduces the transmission of vibration / impact between the bed 5 and the hollow column 17 connected via the bolt vibration isolating member 24. The vibration damping material is not limited to natural rubber as long as transmission of vibration of one member to the other member can be reduced among the two members connected to each other via the bolted vibration isolation member 24. For example, a resin material such as a gel material or an elastomer can be used.

The cover 22 is a plate-like member made of, for example, stainless steel (SUS), and is fixed to the hollow strut upper portion 18 with a plurality of bolts.
As shown in FIG. 4, a damping material 25 is interposed between the inner surface of the cover 22 and the hollow column 17. The damping material 25 is a sheet-like member (damping sheet) formed of a damping material such as natural rubber, for example, and a thin metal material is attached to the surface. That is, the damping material 25 is coated with metal. This prevents cutting waste (chip) or the like from being pierced into the vibration damping material 25. As the vibration damping material constituting the vibration damping material 25, a resin material such as a gel material or an elastomer can be used, as in the case of the vibration-proof member 24 with a bolt.

In summary, the cover 22 is fixed to the floor surface F via the damping material 25 and the hollow support column 17.
The upper surface cover 23 is a plate-like cover 22 that covers a rectangular opening formed by the pair of hollow struts 17 and the pair of covers 22, and is made of, for example, stainless steel.

  When gear processing is performed on the workpiece W using the processing machine 1, first, the workpiece W is mounted on the mounting jig 11, and then the support center 15 is moved down between the mounting jig 11 and the support center 15. The workpiece W is supported rotatably. Next, by driving the column 6, the saddle 7, and the hob head 8, the hob cutter 9 is moved in the X, Y, and Z axis directions and is turned around the A axis according to the twist angle of the workpiece W. Then, the hob cutter 9 is rotated about the B axis and the rotary table 10 is rotated about the C axis, and from this state, the column 6 is moved in the Z axis direction, and the hob cutter 9 is cut into the workpiece W. . Thereby, the outer periphery of the workpiece W is scraped off by the blade portion of the hob cutter 9, and a tooth profile is created on the workpiece W.

Here, during the gear machining, machining vibration propagates from the hob cutter 9 to the column 6 and from the column 6 to the bed 5. Further, the machining vibration propagates from the workpiece W to the counter column 13 and from the counter column 13 to the bed 5.
At this time, the vibration source is covered with the pair of hollow columns 17, the pair of covers 22, and the upper surface cover 23, so that the noise is blocked.

  According to the above embodiment, the cover 22 and the bed 5 are connected via the vibration-proof member 24 with a bolt, which is a coupling member made of a damping material, and therefore vibration from the vibration source of the processing machine 1 to the cover 22 is prevented. Propagation is suppressed. Thereby, radiation of noise due to vibration of the cover 22 can be suppressed.

  Moreover, the vibration isolation member 24 with a bolt is disposed between the hollow column bending portion 19 and the bed 5, thereby supporting the hollow column 17 with a good balance between the vibration isolation member 24 with the bolt and the floor surface F. Can do.

  Further, since the sheet-shaped damping material 25 is interposed between the inner surface of the cover 22 and the hollow support column 17, it is possible to further suppress the radiated sound from the cover 22. Further, since the surface of the vibration damping material 25 is coated with metal, it is possible to prevent the vibration damping material 25 from being deteriorated by cutting scraps or the like during gear processing.

(Second embodiment)
Hereinafter, the processing machine 1B of 2nd embodiment of this invention is demonstrated based on drawing. In the present embodiment, differences from the first embodiment described above will be mainly described, and description of similar parts will be omitted.
The bed 5 of the processing machine 1B has a surface formed of a casting having a thickness of about 20 mm. When the casting has such a thickness, the efficiency with which vibration is converted into sound (hereinafter referred to as acoustic radiation efficiency) may be greatest near 1 kHz, which is the frequency range that is most audible within the human audible range. There is. That is, even a small vibration is emitted as a loud sound within this frequency range.

As shown in FIG. 5, the soundproof structure 2 </ b> B of the present embodiment includes a bed sound insulation plate 27 (lower cover) that surrounds the bed 5. The bed sound insulation plate 27 has a pair of first bed sound insulation plates 27 a attached to the front and rear surfaces of the bed 5 and a pair of second bed sound insulation plates 27 b attached to the side surfaces of the bed 5.
The first bed sound insulation plate 27a is attached to the hollow strut lower portion 20 by a fastening member such as a bolt 12, for example. The second bed sound insulation plate 27 b has a horizontal portion 28 along the hollow support column bent portion 19 and a vertical portion 29 along the hollow support column lower portion 20 so as to cover the hollow support column bent portion 19 and the hollow support column lower portion 20. It is attached.

  According to the said embodiment, the radiation sound from the surface of the bed 5 can be suppressed and the radiation | emission of the noise of the processing machine 1B can be reduced more. That is, even when the acoustic radiation efficiency becomes the highest near 1 kHz, which is the frequency range that is most audible within the human audible range, sound emission can be suppressed.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in each of the above-described embodiments, the vibration isolating member 24 with the bolt is configured to be disposed between the upper surface of the bed 5 and the lower surface of the hollow column bending portion 19. If it is the structure interposed between 17 and the bed 5, it will not restrict to this. For example, you may arrange | position the vibration isolator 24 with a volt | bolt between the side surface of the hollow support | pillar lower part 20, and the side surface of the bed 5. FIG.

Moreover, in each said embodiment, although the hobbing machine was employ | adopted as the processing machine 1, if it is the processing machine 1 which has a vibration source, it will not restrict to this. For example, you may employ | adopt the soundproof structure 2 of embodiment of this invention for machine tools, such as a milling machine.
Further, the damping material 25 may be disposed between the bed sound insulation plate 27 and the hollow support column 17.

DESCRIPTION OF SYMBOLS 1,1B processing machine 2,2B Soundproof structure 3 Processing machine main body 5 Bed 6 Column 7 Saddle 8 Hob head 9 Hob cutter 10 Rotary table 11 Mounting jig 13 Counter column 14 Lifting head 15 Support center 17 Hollow support | pillar (support)
18 Hollow upper part (upper part)
19 Hollow prop bent part (post bent part)
20 Hollow strut lower part (lower strut part)
22 Cover (upper cover)
23 Top cover 24 Anti-vibration member with bolt (connecting member)
25 Damping material 27 Bed sound insulation board (lower cover)
28 Horizontal part 29 Vertical part F Floor W Work

Claims (2)

A machine that processes workpieces on a bed,
A column provided at a position on the outside of the bed in plan view and supported on the floor surface;
An upper cover supported by the support column and surrounding the space above the bed;
Have a, a connecting member made of damping material for connecting between the bed and the strut,
The strut includes a strut upper portion extending above the bed, a strut lower portion disposed in parallel with the side surface of the bed, a strut bending portion connecting the strut upper portion and the strut lower portion spaced apart in plan view. Have
The connecting member is a processing machine that is disposed between the column bending portion and the bed . The processing machine according to claim 1 , further comprising a lower cover supported by the support column and surrounding the periphery of the bed.

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