JPS5852768B2 - Wheels on band saws, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a wheel in, for example, a band saw machine, and more specifically, the wheel body is divided into an outer ring and an inner ring, and a contact surface between the outer ring and the inner ring is This invention relates to a wheel in which vibrations, noise, etc. of a cutting tool during cutting are reduced by interposing an elastic body or the like.

Conventionally, the structure of a wheel X used in, for example, a bandsaw machine has been an integral structure as shown in FIG.

For this reason, the teeth of the band saw blade come into contact with the workpiece, and the vibration generated when each tooth scrapes the workpiece is generated from the contact area between the band saw blade and the workpiece, and is transmitted sequentially to the saw blade, wheel, and entire mechanical system. This propagation caused resonance in the mechanical system.

In particular, when cutting difficult-to-cut materials such as stainless steel bars (TIS-8O8), a very sharp and noisy noise is generated, which has a negative impact on the health and work of the worker and people nearby. There was also a problem with noise pollution.

This invention was devised in view of these conventional problems, and its purpose is to divide the wheel body into two parts, an outer ring and an inner ring, and to add elasticity to the contact surface between the outer ring and the inner ring. The present invention provides a wheel for a band saw machine, etc., which is equipped with a body or the like to reduce vibration and noise of the band saw blade during cutting.

Another object of the present invention is to provide a wheel for a band saw machine or the like that improves cutting accuracy by reducing the vibration and noise of the band saw blade.

Furthermore, another object of the present invention is to provide a wheel for a band saw machine, etc., in which the life of the band saw blade is significantly extended.

Hereinafter, a preferred embodiment of the present invention will be described based on the accompanying drawings.

FIG. 2 shows a general horizontal bandsaw machine using the wheel according to the present invention. On a rectangular base 1, there is a material support 3 that supports a workpiece M (work material M). A vice mechanism 5 including a fixed vice jaw 5f and a movable vice jaw 5M for clamping and fixing the workpiece M placed and supported on the material support table 3 is attached.

Also on the base 1 is a C-shaped saw blade I.
is rotatably supported in the vertical direction via a hinge pin 9.

A drive wheel 13 is rotatably installed inside one housing part 11 of the saw blade housing 7 via a drive shaft 15, and a drive wheel 13 is rotatably installed inside the other housing part 1T via a rotating shaft 19. A driven wheel 21 is rotatably installed inside.

A loop-shaped band saw blade 23 (cutting tool) is rotated between the drive wheel 13 and the driven wheel 21 .

In addition, in the saw blade housing I, the housing portion 11,
The guide bar 27 provided on the beam member 25 that connects and supports the vicinity of the upper part of the band saw blade 23 has guide pieces 29 and 31 at its lower end for guiding and supporting the band saw blade 23 on both sides of the cutting area of the band saw blade 23. First and second guide brackets 33 and 35 are respectively mounted so as to be adjustable in position.

A piston rod 39 of a drive device 37 such as a hydraulic cylinder is connected to the second guide bracket 35 , and a cylinder 41 of the drive device 37 is fixed to the guide bar 27 .

Note that in order to vertically rotate the saw blade housing 7 about the hinge pin 9 when cutting the workpiece M, the tip of the piston rod 43 is pivotally connected to an appropriate position of the saw blade housing 7. , and by the operation of a lift cylinder 45 whose base is pivotally supported by the base 1.

This invention includes the driving wheel 13 and the driven wheel 2.
The gist is the structure of 1.

In the following description, the driving wheel 13 and the driven wheel 21 are collectively referred to as the wheel body 47.

As shown in FIGS. 3 and 4, the wheel body 47 of the present invention is composed of a disk-shaped inner ring 49 and an outer ring 51 that is fitted over the outer circumference of the inner ring 49. As shown in FIGS.

The outer circumferential surface 49a of the inner ring 49 and the inner circumferential surface 51a of the outer ring 51 are each formed into a tapered contact surface, and an elastic member 53 made of, for example, urethane or nitrile rubber is interposed on this contact surface. .

Further, the inner ring 49 and the outer ring 51 are connected via bolts 55, and the inner ring 49 and the outer ring 51 are connected via the bolts 55.
By tightening, the elastic member 53 interposed on the tapered contact surface is tightened.

In addition, in Fig. 4, 57 a t 57 b j5
7c is an elastic member for preventing the bolt 55 from coming into direct contact with the inner ring 49 and the outer ring 51 and transmitting noise or the like.

As described above, in the present invention, the wheel body 47 is divided into an inner ring 49 and an outer ring 51, and an elastic member 53 is interposed between the contact surfaces of both wheels 49 and 510. During cutting, vibrations and noise generated from the cutting portion between the bandsaw blade 23 and the workpiece M can be prevented from propagating to the entire mechanical system via the wheel body 47.

Next, the noise generation conditions of the split wheel body 47 of the present invention and a conventional integrated wheel having a urethane rope attached to its circumferential surface were compared through experiments using the following experimental equipment and devices.

◎ Experimental equipment, conditions (1) Machine used Horizontal band saw machine, model: HA-404 SER: 40400392 (2) Saw blade type: GLB Tooth profile: M Clams: Raker set pitch: 3 threads (3) Work material: 5US27 (SUS304 ) Shape: 200φ (4) Cutting conditions speed regulation: 30m/acclimated load: 350kg Cutting rate 15crA/acclimated (5) Cutting oil type: Amada HD Cooling: Water: HD=19:1 (6) Saw blade tension pressure crab 33kg/cd Load: 1937 Yu (standard) (7) Measuring equipment used Sound level meter: PSloop (node) Level recorder: LR-02 (Rion) (8) Measurement point Place the measuring equipment at a position 1000 mm from the saw blade. .

As a result of conducting cutting noise experiments under the above experimental conditions, graph data as shown in FIGS. 5 and 6 were obtained.

FIG. 5 shows the wheel body 47 in accordance with the present invention, and FIG. 6 shows the wheel body 47 in which a conventional integrated wheel is used.

Comparing both graph data, the noise value (dB value) of the conventional type wheel is approximately 98 dB, whereas
In the split type wheel according to this invention, 87 dB
It is clear that there is a sharp decline.

From the above, the wheel body 47 of the present invention can particularly reduce noise significantly.

FIG. 7 shows a second embodiment of the present invention, in which an elastic member 53 is press-fitted or baked into the contact surface between the inner ring 49 and the outer ring 51 to integrate the inner ring 49 and the outer ring 51. It is something.

This prevents the propagation of noise, vibration, etc., as in the first embodiment.

Next, FIG. 8 shows a third embodiment of the present invention, in which annular elastic members 69a and 69b having different elastic coefficients are provided between an inner ring 49 and an outer ring 51.

69c is inserted.

The elastic modulus of the elastic members 69a, 69b, and 69c increases in the order of 69a<69b<69c.

Further, the elastic members 69b and 69c interposed at the connecting portion between the inner ring 49 and the outer ring 51 are tightened and held by the two guide plates 71a and 71b, the guide tube 73, and the holding bolt 75.

Further, on the outer peripheral surface of the guide tube 73 inserted into the inner ring 49,
An annular elastic member 69d having a width approximately equal to the width of the inner ring 49 is interposed.

Further, the bolts 77 that firmly tighten the inner ring 49 and the outer ring 51 are the two guide plates 71a.

71b, elastic member 59 b t 59 c and inner ring 4
9.

The two guide plates 71 at 71 b have one end attached to the side surface of the outer ring 51 in parallel via bolts 79 at 79 b, and the other end sandwiching the guide cylinder 73 and connected and held by a holding bolt 75. has been done.

When the bolt 77 is tightened based on the above configuration,
As mentioned above, the elastic members 69b and 69c have an elastic modulus of 6.
Since the relationship 9b<69c holds, the inner ring 49 is smaller than the outer ring 51.
The inclined portion, that is, the inner ring 4
9 and the elastic member 69a interposed between the contact surface with the outer ring 51 is deflected.

Further, the hole 81 provided in the elastic member 69a is
This is to make 9a more flexible.

Although the elastic member 69a is not necessarily required, for example, when a large load acts on the elastic member 69b.

In cases where 69c cannot bear the load,
It is protected by an elastic member 69a.

Therefore, when the elastic member 69a is not required, other elastic members 69bt69c having the same elastic modulus are used.

Next, FIG. 9 shows a fourth embodiment of the present invention, in which an inner ring 49, an outer ring 51, and two annular elastic members 83a with substantially the same sloped surface as the sloped surface of
83b is interposed.

A plurality of holes 87 are provided at appropriate positions on the circumference of the annular elastic members 83a, 83b to pass through both the elastic members 83a, 83b and into which the guide tube 85 is inserted.

Further, the guide tube 85 determines the final tightening position of a fastener 89 such as a bolt from both directions, and the annular elastic member 83
The tightening of a, 83b is sometimes to prevent said hole 87 from deflecting inward.

Further, on the side surfaces of the inner ring 49 and the outer ring 51, two elastic members 91a, 91b and mounting bolts 93a, 93 are provided.
A guide plate 95 is provided via b, and this guide plate 95
is for maintaining the balance between the inner ring 49 and the outer ring 51.

That is, the annular elastic member 83a>
83b, if the outer ring 51 cannot maintain an equilibrium state with respect to the inner ring 49 (each annular elastic member 83a
, 83b (defects in sloped portions, variations in elastic modulus), and always maintains an equilibrium state.

Note that a hole 97 provided in the guide plate 95 is an operation hole for operating the fastener 89, and 99 is an annular elastic member 83a.
This is a support plate that supports t 83b.

Although each of the above embodiments has been described with respect to the wheel body 47 used in a horizontal bandsaw machine, it goes without saying that the wheel body 47 may be used in other mechanical devices.

In this invention, as described above, the wheel body 47 of a horizontal bandsaw machine or the like is divided into two parts, an inner ring 49 and an outer ring 51, and an elastic member 53 is interposed on the contact surface between the inner ring 49 and the outer ring 51. , it has the following excellent effects.

(2) Vibration and noise during cutting can be absorbed by the elastic member 53 and significantly reduced.

Therefore, problems such as noise pollution can also be solved.

■ Also, since vibration, noise, etc. can be reduced, cutting accuracy can be improved.

■ Furthermore, the life of cutting tools can be extended for the same reason.

(2) Moreover, since the structure of the wheel body 47 is extremely simple, it can be manufactured at low cost and maintenance is easy.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional wheel, FIG. 2 is a schematic front view of the wheel body of the present invention applied to a horizontal bandsaw machine, and FIG. 3 is a front view showing the first embodiment of the present invention. , Fig. 4 is an enlarged explanatory view of the Y section in Fig. 3, Fig. 5, Fig. 6
The figure is a graph explanatory diagram comparing noise between a conventional wheel and a wheel according to the present invention, Fig. 7 is a front view showing a second embodiment of the present invention, and Fig. 8 is a front view showing a third embodiment of the present invention. FIG. 9 is a partially enlarged explanatory diagram showing a fourth embodiment of the present invention. (Explanation of main symbols shown in the drawings), 49...
...Inner ring, 51...Outer ring, 47...
Wheel body, 53...Elastic member.

Claims (1)

[Scope of Claims] 1. A wheel body 47 for a band saw machine or the like, in which an inner ring 49 and an outer ring 51 are configured to be detachable, and an elastic member 53 is interposed on the contact surface between the inner ring 49 and the outer ring 51. A wheel for a band saw machine, etc., characterized by the following. 2. A wheel for a bandsaw machine or the like according to claim 1, wherein the inner ring 49 and the outer ring 51 are integrally formed via an elastic member 53 interposed on the contact surface between the inner ring 49 and the outer ring 51.