JPH0645314Y2 - Scraper for machine tools - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention relates to machine tools such as lathes and milling machines.
It is attached to one of the two parts that slide against each other with their edges in contact with the sliding surface, scraping off chips, cutting oil, etc. that have fallen on the sliding surface due to the relative movement of the two parts. Prevents chips from entering the part and scratching the sliding surface. The present invention relates to a scraper for machine tools.

[Conventional technology]

The machine tool scraper has been used by being attached to more machine tools than ever before, but most of the conventional scrapers are made of a flat strip-shaped rubber plate formed in a shape according to the place of attachment and are slidable. An edge portion is formed at the end portion in contact with the surface. Further, in some cases, in order to reinforce the entire scraper, a reinforcing steel plate is integrally joined to a portion other than the edge portion.

These scrapers are tightened and fixed to the machine tool with bolts while applying a strip-shaped metal plate from the outside.
At this time, the tip of the edge portion is pressed against the sliding surface to slightly bend the edge portion so that the sliding surface can be scraped off reliably.

[Problems to be solved by the device]

In the conventional scraper, since the edge portion is formed by forming one end edge of a flat rubber plate into an edge shape, in order to surely exert the scraping function, the tip of the edge portion should be a sliding surface. It was necessary to align and fix it while pressing it with a large force, and it took a lot of time and effort to install it. Further, since the device is attached by pressing with a considerably large force in this way, the edge portion is easily damaged during use due to abrasion or breakage, and there is a problem in durability.

Furthermore, since the conventional scraper is configured to press the edge portion and forcibly bend the scraper in either the front or back direction to attach the scraper, if there is unevenness on the sliding surface, unevenness will occur when passing through. I often gave it to the other side. For this reason, the scraping function is often not sufficiently exerted, and the effect of sealing chips and the like is insufficient.

This invention was made in order to solve the problems of the conventional scraper as described above, and the purpose thereof is that the work of attaching to a machine tool is very easy and
It is to provide a scraper for a machine tool that exhibits an excellent scraping function for a long period of time and can maintain a good sealing effect against chips and the like, and that also has excellent durability.

[Means for Solving the Problems]

In order to achieve the above object, the present invention takes the following technical means.

That is, a mounting portion (1a) that is made of an elastic member and is mounted on a machine tool, and a lip portion (1b) that is formed integrally with the mounting portion (1a) and is inclined with respect thereto.
An edge portion (1c) is formed at the tip of the lip portion (1b), and the lip portion (1b) is formed near the boundary between the attachment portion (1a) and the lip portion (1b). A groove (3) is provided on the inclined side along the boundary line.

The angle between the lip part (1b) and the mounting part (1a) is almost
It is preferably 120 ° to 150 °, but usually about 135 °. The hardness of the elastic member is approximately 70 ° to 90 °.

The cross-sectional shape of the groove (3) is preferably substantially arcuate.

[Action]

With the above structure, the lip portion (1b) inclined to the mounting portion (1a) is provided, and the edge portion (1c) is provided at the tip thereof.
The edge portion (1c) is more likely to swing than a simple rubber plate having an edge portion formed on one edge.

Further, since the groove (3) is provided near the boundary line between the mounting portion (1a) and the lip portion (1b), the lip portion (1b) is easily bent upward with respect to the mounting portion (1a) and It is hard to bend.

Therefore, it is not necessary to strongly press the edge portion (1c) against the sliding surface of the machine tool (4) during mounting, and even when the edge portion (1b) moves on the uneven surface of the sliding surface, the lip portion (1b) is on the opposite side. There is no fear of turning over.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, (1) is a scraper according to the present invention, which is made of a rubber plate having a hardness of about 90 °, and has a bent front shape as shown in FIG. 2 according to the shape of a mounting portion of a machine tool.
It has the cross-sectional shape shown in FIG. The cross-sectional shape is the same over the entire length of the scraper (1).

As clearly shown in FIG. 1, the scraper (1) is formed so as to be inclined with respect to the mounting portion (1a) at an angle of about 135 ° with respect to the mounting portion (1a). It is composed of a lip portion (1b). The mounting portion (1a) is provided with a plurality of mounting holes (2) at predetermined intervals, and an edge portion (1c) like a knife blade is formed at the tip of the lip portion (1b).

At the boundary between the mounting portion (1a) and the lip portion (1b), as shown in FIG. 3, a groove (3) extending along the boundary line is formed on the side where the lip portion (1b) is inclined. There is. In this embodiment, the groove (3) has an arc-shaped cross section with a radius of about 0.5 mm. Due to this groove (3), the wall thickness at the boundary between the mounting portion (1a) and the lip portion (1b) is thinner than other portions, and the lip portion (1b) is located on the side of the groove (3) ( It is easy to bend upwards and hard to bend on the opposite side (downward). The shape of the concave groove (3) is not limited to that of this embodiment, and can be implemented as any other shape.

The scraper (1) having the above structure is attached to the sliding portion of the machine tool (4) (in this embodiment, a CNC lathe) as shown in FIG. That is, the mounting part (1a) is fixed to the side wall (8) of the fixed headstock (5), and the tool rest (6) and the tailstock (7) are movable with respect to the headstock (5). The edge portion (1c) at the tip of the lip portion (1b) is pressed and brought into contact with the upper wall (9) to be attached.
Thus, the lower wall (10) of the headstock (5) and the tool rest (6)
And the gap (11) between the tailstock (7) and the upper wall (9)
Is closed by the lip portion (1b) to prevent chips and the like from entering.

The scraper (1) is attached to the side wall (8) as follows. First, the side wall (8) is provided with a plurality of through holes (12) at positions corresponding to the mounting holes (2) of the scraper (1), and also at the same position on the strip-shaped pad (13). Make a through hole (14). And mounting holes (2)
On top of the through hole (12) of the side wall (8), and in that state, further apply a pad (13) from the outside to the through hole (14).
Are overlaid. Therefore, each hole (2) (12) (1
The bolt (15) is inserted into 4) and the nut (16) is tightened and fixed from the back side. At this time, it is necessary to adjust the fixing position so that the tip of the edge portion (1c) presses and contacts the surface (9a) of the upper wall (9) of the machine tool (4) with an appropriate force.

The scraper (1) thus makes the fixing part (1a) closely contact with the outer surface of the side wall (8) as shown in FIG.
The tip of b) is directed obliquely downward to the side away from the side wall (8), and the edge portion (1c) is attached to the upper wall (9) of the machine tool (4) in contact therewith.

Next, a usage state of the scraper (1) attached to the machine tool (4) will be described.

When the upper wall (9) moves horizontally to the left or right during the operation of the machine tool (4), the edge part (1c) of the scraper (1) comes into contact with the surface (9a) of the upper wall (9) while pressing lightly. Therefore, the tip of the edge portion (1c) always slides on the surface (9a).

When the upper wall (9) moves in the direction of arrow A, the lip (1b) is pulled in the same direction, but the scraper (1)
Is a rubber plate with a hardness of about 90 °, so the fixed part (1
There is no risk that a) will bend significantly in the same direction and the pressing force of the lip (1b) will decrease. Further, the groove (3) provided at the boundary between the lip portion (1b) and the attachment portion (1a) allows the lip portion (1b) to easily bend upward, so that the lip portion (1b) is in the middle thereof. There is no fear of bending. The lip portion (1b) almost only swings up and down (pivots) around the boundary line with the mounting portion (1a) as an axis.

In this way, the lip portion (1b) receives a force from the edge portion (1c) at the tip thereof and swings about the boundary line, so that the edge portion (1c) moves up and down very smoothly. You can

When the upper wall (9) moves in the direction of arrow B,
The lip (1b) is pressed in the same direction, but the lip (1b)
Since b) is inclined, and the groove (3) makes it difficult to bend downward, there is no risk that the lip (1b) will curl up and the tip will point in the direction of arrow B.

When the edge portion (1c) passes through the small unevenness on the surface (9a) of the upper wall (9), when passing through the recessed portion, the lip portion (1b) bends downward due to the elastic force and passes through the protruding portion. At times, since the lip portion (1b) can be easily bent upward by the concave groove (3), the lip portion (1b) can accurately follow the unevenness. Therefore, the upper wall (9)
There is no gap between the surface (9a) and the surface (9a), and chips, cutting oil, etc. can be reliably scraped off.

The scraper (1) is made of rubber alone and has no reinforcing steel plate or the like embedded therein. Therefore, the scraper can be easily cut and the workability is excellent. Therefore, there is an advantage that even a complicated shape can be manufactured.

The hardness of the rubber forming the scraper (1) is preferably about 70 to 90 °, and normally, within this range, the hardness, the length and thickness of the lip portion (1b) are appropriately set according to the sliding speed. .
Also, the angle (θ) between the lip (1b) and the mounting (1a)
Also, it is preferable to set the angle to about 120 ° to 150 °, and it is particularly preferable to set it to about 135 ° as in the above embodiment. However, it is needless to say that the values are not limited to these values, and can be appropriately set according to the application, so long as the object and effect of the invention are met.

[Effect of device]

The present invention has the configuration described above, and therefore has the following excellent effects.

Since the edge part (1c) provided at the tip of the lip part (1b), which is made easier to bend, is lightly pressed against the surface of the sliding part, it is only necessary to fix the mounting part (1a). Installation work is very easy.

Further, since the mounting portion (1a) is fixed while the edge portion (1c) is lightly pressed against the surface of the sliding portion such as the upper wall (9) of the machine tool (4), the edge portion ( 1
c) does not always exert a large force, so the edge (1c)
Is hard to break and has excellent durability.

Since the lip portion (1b) easily swings up and down due to the concave groove (3) provided in the boundary line with the mounting portion (1a), the edge portion (1c) becomes uneven on the surface of the sliding portion. It is possible to reliably follow, and even when passing through the uneven portion, chips, cutting oil, etc. can be reliably scraped off, and a good sealing effect of chips, etc. can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a state in which a machine tool scraper according to the present invention is attached to a machine tool, FIG. 2 is a partially omitted front view of the scraper, and FIG. 3 is a portion C of FIG. FIG. 4 is a partially enlarged front view of FIG. 4, and FIG. 4 is a partial perspective view of the machine tool showing a mounted state of the scraper. (1) …… Scraper for machine tools (1a) …… Mounting part, (1b) …… Lip part (1c) …… Edge part, (2) …… Mounting hole (3) …… Concave groove, (4) …… Machine tool (8) …… Side wall, (9) …… Upper wall (9a) …… Upper wall surface, (10) …… Lower wall (11) …… Gap, (12) (14) …… Through hole (13) …… Match, (15) …… Bolt (16) …… Nut

Claims (4)

[Scope of utility model registration request] 1. A mounting portion (1a) which is made of an elastic member and is mounted on a machine tool, and a lip portion (1) which is formed integrally with the mounting portion (1a) and is inclined with respect to the mounting portion (1a).
b), an edge portion (1c) is formed at the tip of the lip portion (1b), and the lip portion (1b) is formed near the boundary between the attachment portion (1a) and the lip portion (1b). ) Is provided with a concave groove (3) on the inclined side along the boundary line, the scraper for machine tools. 2. The machine tool scraper according to claim 1, wherein an angle formed by the lip portion (1b) and the mounting portion (1a) is approximately 120 ° to 150 °. 3. The machine tool scraper according to claim 1, wherein the elastic member has a hardness of approximately 70 ° to 90 °. 4. The scraper for machine tools according to claim 1, wherein the concave groove (3) has a substantially arc-shaped cross section.