JPS6021159Y2 - Chip discharge device in cutting machine tools - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a swarf discharge device for cutting machine tools such as hotels and other cutting machines.

In hotels and the like that cut metal, it is often necessary to remove chips, which are cutting waste.

In particular, automatic machine tools are required to perform this automatically and smoothly.

Cuttings from silver and copper are usually continuous and bulky, while cuttings from cast iron are powdery and heavy.

In addition to this, cutting tool cooling liquid is mixed in, and chips tend to adhere to the pan of the chip receiver and the walls of the groove.

It has been surprisingly difficult to create a conveyor mechanism that can smoothly discharge these chips with different properties and chips mixed with coolant.

For example, even if an inn is equipped with a conveyor with a V-shape slanted cut-off tray and a scraping plate driven by a chain in the valley, the cut may get into the mechanical drive unit, causing problems with the drive unit. The dust gets tangled in the boards and chains, rendering it useless.

When using a normal screw conveyor, which has screw blades on a rod-shaped rotating shaft, as a relatively practical mechanism, casting chips can generally be discharged, but cutting chips are separated by the blades. The threaded chips cannot be taken into the screw groove because they do not flow, and they are caught between the screw and the groove wall and cannot be smoothly discharged.

Also, the shaft of the screw conveyor is eccentric due to chips, and the center of the motor is misaligned.
The conveyor blades and groove material are subject to severe wear, which is undesirable.

Under these circumstances, it has been proposed to use a round wire coil spring placed in a groove as a screw conveyor.

However, since the outer surface of the chips has a very sharp shape, there is a large amount of friction with the discharge groove, and the coil spring rides on the lump of chips, causing the rotating coil spring to bounce up from inside the groove. Unable to eject chips.

In order to prevent the coil spring from springing up, the coil spring is wrapped around more than half of the coil spring, and the opening of the groove is narrowed so that the coil spring does not come out, or a number of plates are installed at the upper opening of the groove to suppress the springing of the coil spring. However, in the former case, the chips would get caught between the coil spring and the groove wall, making it impossible for the coil spring to rotate, and in the latter case, the chips in the holding plate would become stuck. becomes stuck, making it impossible for the coil spring to rotate.

Therefore, the object of this invention is to provide a screw conveyor for discharging cuttings that can smoothly and automatically discharge cuttings without any trouble for a long period of time.

To achieve this objective, the invention provides a preferably U-shaped chip receptacle, a U-shaped groove with a smooth inner wall surface into which it automatically slides or is scraped; It consists of a coil spring made of wire that forms a chip scraping surface that touches the bottom of the groove and stands upright from it.

This will be explained below according to the illustrated embodiment.

FIG. 1 is a plan view showing an outline of a screw conveyor device for discharging cuttings according to this invention, which is inserted below a bed in the ground.

As can be seen from the right side view and front view of FIG. 1 shown in FIGS. 2 and 3, the device of this invention has an elongated V-shaped receiving plate 1 for receiving chips disposed in the center. , a groove 2 having a U-shaped cross section is provided in the valley portion.

The surface of this receiving plate 1 is continuously and smoothly formed into the vertical wall 3 of the groove 2.
It is preferable that it is continuous.

A coil spring 4 is inserted into this U-shaped groove 2, and the coil radius is approximately equal to the radius of curvature of the bottom of the groove 2.

The cross section S of the filament of this coil spring 4 is rectangular, as shown in FIG. It is better if it is longer than the width W.

Of course, the cross section S of this filament may be variously modified as shown in Figures 5a''-'c, but basically the scraping surface 5 that pushes the chips comes into contact with the groove 2 at its periphery, In addition, it is essential that the groove be formed so as to be substantially orthogonal to the wall of the groove.

Generally speaking, it is better for the pitch dimension of the coil spring 4 to allow continuous wire cutting to fall.

The diameter of the coil spring 4 is preferably approximately equal to or larger than this pitch.

Make sure that the pitch is not too large relative to the diameter so that the chips can be scraped off on the scraped surface 5.
This may cause overflow and the removal of chips will not be smooth.

The base end of the coil spring 4 is bent and implanted into a rotary disk 8 for mounting the drive motor 7 and fixed thereto.

Then, the implanted portion 4a of the coil spring 4 is held down by a pin 9 provided on the stepped portion 8a of the rotary disk 8 so that it does not come out.

The coil spring 4 is rotated by the motor 7 in a direction that reduces the coil diameter when the coil spring 4 is retracted within the groove 2, as indicated by the arrow in FIG.

Now, when the cuttings fall from between the beds in the ground to the receiving plate 1 of the cuttings together with the cooling liquid, the cooling liquid flows out through the center of the coil spring 4, and the cuttings fall into the groove 2 on the slope of the receiving plate 1. Get into it.

In the groove 2, the coil spring 4 is constantly driven to rotate by the motor 7, so the chips are basically dropped into the chip receiving tank 10 by the principle of a screw conveyor, and are collected by the mesh 11 of the receiving tank 10. Cut upwards 12
However, the coolant 13 is then decomposed downward.

However, the small chips pass through the gaps between the large chips and collect at the bottom of the groove 2.

In conventional round wire coil springs, the surface of the spring wire in contact with the curved bottom of the groove is a curved surface, so the spring wire rides on a small piece of swarf, causing the coil springs in front and behind it to move away from the bottom of the groove. It is now floated and chips are deposited.

On the other hand, according to the fill spring 4 according to this invention, which has a scraping surface 5 that is in contact with the bottom of the groove 2 and stands upright from it, the chips are reliably scraped off from the bottom of the groove, and It will be moved closer to the mistake receiving tank 10.

In particular, the bottom of the curved portion of the groove 2 is made large, although it is approximately equal to the radius of the coil spring, and the scraping surface 5 is approximately perpendicular to the inner wall of the groove 2, so that the scraping surface 5 is formed at the bottom of the groove.
The chips that have been scraped off and moved toward the wall side of the groove 2 easily fall off from that position on the scraping surface 5 due to its gravity, and fall to the bottom of the groove 2 along the scraping surface 5 that continues in a coil shape. It easily falls down and is smoothly and efficiently transferred to the swarf receiving tank 10.

As described above, according to this invention, the periphery of the scraping surface 5 of the coil spring is in contact with the wall of the groove 2, and the scraping surface is made to stand upright from the wall, so that the coil spring is not repelled from the groove. There is no need for a holding plate for this purpose, and automatic ejection of cuttings can be carried out smoothly over a long period of time.

Incidentally, a plurality of grooves 2 and coil springs 4 according to this invention may be arranged adjacent to each other, and the plate 1 may be omitted for the chip catcher.

Further, it is also possible to form one groove so that a plurality of coil springs are driven in parallel, excluding the partition walls of the grooves 2 arranged adjacent to each other.

In this case, it is preferable to provide a curved portion corresponding to each coil spring at the bottom of one groove, thereby avoiding the accumulation of chips between the spring coils.

Furthermore, when driving two coil springs in one groove, as a general rule, both coil springs are driven from the side where both coil springs are close to each other, through the upper side of the coil spring, to the walls on both sides of the groove. It is preferable to drive them in opposite directions.

[Brief explanation of drawings]

Fig. 1 is a plan view of an implementation device according to the invention, Fig. 2 is a right side view thereof, Fig. 3 is a front view thereof, Fig. 4 is an enlarged front view of a coil spring, and Figs. 5a-c. FIG. 3 is a diagram showing a cross section of a wire of a coil spring in various embodiments. Explanation of symbols, 1: Receiving plate for chips, 2: U-shaped groove, 3: Vertical wall of groove, 4: Coil spring, 5: Scraping surface of coil spring, 6: Scraping surface of coil spring Contact surface with groove, 7: Motor, 8: Rotating disk, 9: Pin, 1
0: Cuttings receiving tank, 11: Net, 12: Cuttings, 13: Coolant.

Claims (3)

[Scope of utility model registration request] (1) A chip discharge device for a cutting machine tool in which a coil spring is disposed in a U-shaped groove continuous with a chip receiving plate, and the coil spring is driven to rotate within the groove, The coil spring has a radius less than or equal to the radius of the bottom curved portion of the groove, the coil spring filament has a scraping surface upright from the groove wall surface on the chip discharge side, and the coil A swarf discharge device characterized in that it is cantilevered at the base end of a spring and driven to rotate. (2) One end of the U-shaped groove is blocked at the upstream end in the chip discharge direction, and the other end is open, allowing cutting water to flow out through the hollow part of the coil spring. A swarf discharge device for a cutting machine tool as set forth in claim (1) of the utility model registration claim. (3) A plurality of the above-mentioned U-shaped grooves are arranged in parallel and joined to each other to form a single groove having a bottom portion with a plurality of curved parts connected to each other without a partition wall, and a plurality of the above-mentioned fill springs in the groove are formed. are arranged along each of the curved portions in the groove, and the two coil springs are driven to rotate in opposite directions. A device for removing chips from a machine.