JPH045229Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention makes it possible to automatically remove chips when chips are produced continuously over a long period of time, such as when turning steel. Regarding equipment.

<Prior art> In turning steel materials, for example, when machining the inner ring or outer ring of a bearing, a steel pipe is cut off to a predetermined width to form a ring shape. A large amount of long chips are produced. Fig. 4 shows an automatic lathe used for the parting process, in which a steel pipe 1 of about 6 m in length is supplied from the left side of the figure, and 4 - The steel pipe 1 is sequentially cut from one end by five cut-off bits to form a ring, which falls and is sent out from the chute 5. In the figure, 6 is a main chuck, and 7 is a grip chuck. Although a detailed explanation will be omitted, when a predetermined number of rings are machined by one advance of the tool rests 2 and 3 toward the steel pipe 1, the tool rests 2 and 3 move backward, and the steel pipe 1 is moved to a predetermined size. The cutting tool is fed out, and the tool rests 2 and 3 move forward again to repeat the cutting process. A considerable amount of chips are produced during this parting process, and the chips come out on the upper side of the cutting tool attached to the tool rest 2 located at the front in the figure. If this is left unattended, it can get between the tool and the steel pipe and cause damage to the tool, so currently workers are constantly monitoring it and removing it manually using a metal rod or the like. Note that the cutting tool attached to the tool rest 3 on the opposite side has almost no problem since the chips come out from the bottom and fall downward.

<Problem that the invention aims to solve> This invention is a method that automatically removes long chips when they come out on the upper side of the cutting tool during metal turning so that they do not interfere with cutting. The aim is to provide a device that can.

<Means for Solving the Problem> The means of this invention is to install a cylindrical chute having an opening for receiving chips on the upper side of the cutting part where the cutting tool is attached with the rake face facing upward, to collect the chips generated by the cutting tool. A movable base is provided approximately along the direction in which the chute moves, and has a forward and backward drive unit so as to move forward and backward along the upper side of the chute, and the movable base is provided with an opening of the chute vertically in the forward position of the movable base. A rake-shaped claw having an elevating and lowering drive part is provided so that the chute descends to a crossing position, retreats together with the movable table in the lowered state, and rises at the movable base's retreated position, and the chute can retreat to the top wall of the chute with the claw in its lowered state. It has long holes like this.

<Operation> During the cutting action of the cutting tool, the pawl is lowered by the lifting drive unit at the opening position of the chute, then moved backward as the moving table is moved backward by the forward/backward drive unit, and further moved by the lifting drive unit. The cycle of rising and then moving forward as the moving platform is moved forward by the forward/backward drive unit is used repeatedly. The chips thus generated are received into the interior through the opening of the chute, and even if they remain near the opening, they are forcibly sent to the rear of the chute by the scraping action of the claws descending and retreating. Since the action of scraping in chips by the claws is repeated, the chips do not stay near the cutting part and do not interfere with the cutting action of the cutting tool. The chips that are swept to the rear of the chute by the backward movement of the claws are compressed to the rear and are sent out from the rear end of the chute, so a chip receiver is placed below the chute. It may be processed as appropriate.

<Embodiment> An embodiment of this invention will be explained with reference to FIGS. 1 to 3. FIG. 3 is a plan view of the automatic lathe shown in FIG. 4 provided with an automatic chip removal device 10. The automatic chip removal device 10 includes a chute 11 and a moving table 1.
2. It is composed of a forward and backward drive section 13, a rake-shaped claw 14, and an elevation drive section 15.

The chute 11 is cylindrical with a rectangular cross section, and as shown enlarged in FIGS. 1 and 2,
The front end of the cutting part side where the cutting edge of the cutting tool 16 is located is formed in a shape in which the vertical dimension is slightly expanded forward,
The opening 17 formed by the cylindrical front edge is formed on the oblique front edge so as to face diagonally downward, and the opening 17 is located above the cutting tool 16 at the cutting position.
A portion extending rearward from the turret 2 extends rearward in the forward and backward movement direction of the tool rest 2 and is supported by the chute support stand 18. A chip receiver 19 is arranged below the rear end opening of the chute 11.

The movable table 12 is provided on the upper wall 20 of the chute 11 so as to be linearly movable in the front-rear direction.
In the figure, 21 is a trochanter provided on the movable table 12, and 22 is a protrusion provided on both sides of the upper wall 20 for guiding the movable table.

The advance/retreat drive unit 13 is connected to the top wall 20 of the chute 11.
The piston rod 23 is connected to the movable table 12 and moves the movable table 12 forward and backward.

The rake-shaped claws 14 have five claws 14a provided at equal intervals on a horizontal member 24, as shown in an enlarged view in FIG. The claw 14 is rotatably supported substantially on the same axis as the support shaft of the shaft 21 on the front side of the shaft 12, and the claw 14 is moved up and down by the rotation.

The elevating drive unit 15 is an air cylinder provided on the movable table, one end of which is supported by the movable table 12 by a pivot shaft 26, and a piston rod 27 is connected to a bent portion of the bending arm 25 by a pivot shaft 26a. Due to this operation of the elevating drive unit 15, the lower end of the claw 14a is moved toward the upper wall 2.
0 to the position where it passes through the upper wall 20 and reaches the lower wall 28 of the chute 11. For this purpose, a through hole is provided in the upper wall 20, and the through hole is configured so that the lower end of the claw 14a reaches the lower wall 28 and can move toward the rear of the chute 11 as the movable table 12 moves. Long hole 29
is formed. The length of the elongated hole 29 corresponds to the stroke of the advance/retreat drive unit 13.

Automatic chip removal device 10 configured in this way
Under sequence control, for example, from a state in which the movable table 12 moves forward and the claw 14 is raised, the elevating drive unit 1
The pawl 14 is lowered by the extension operation of the air cylinder 5, the pawl 14 is moved backward by the shortening operation of the air cylinder of the advance/retreat drive section 13, and then the pawl 14 is raised by the shortening motion of the elevation drive section 15. The movement of the claw 14 moving forward due to the extension movement of the portion 13 is
Repeat sequentially. As a result, as shown in FIG.
Accepted from The way the chips come out is approximately chute 11.
However, since the first part comes into contact with the inner surface of the chute 11 and receives resistance, it is not necessarily guided rearward and remains near the entrance of the chute 11. As a result of this action, the chips are forced into the rear of the chute 11 one after another. Therefore, chips will not remain near the entrance of the chute 11, and the cutting action of the cutting tool 16 will continue to work well. Shoot 11
The chips that have reached the rear part of the container 19 are compressed to some extent and fall into the container 19 in a state convenient for later processing.

In the above embodiment, the chute 11 is simply supported on the support stand 18, but if the chute 11 becomes a hindrance to the replacement work of the cutting tool 16, the chute 11 may be made horizontally retractable, or the chute 11 may be moved horizontally. The chute 11 is preferably supported rotatably around a vertical or horizontal axis with respect to the support base 18 so that the tip of the chute 11 can be moved laterally or upwardly.

<Effects of the invention> According to this invention, in metal turning processing,
When long chips come out above the cutting tool, the chips are automatically sucked into the chute, so the chips do not interfere with turning. Therefore, the work that previously required workers to frequently remove chips by hand is no longer necessary, and as a result, the number of automatic lathes that could previously be handled by one worker can now be reduced to two. This used to be the limit, but now it is possible to handle three or more machines. Further, since the chips coming out through the chute are in a compressed state to some extent, there is an advantage that the chips are smaller in volume and easier to handle than in the conventional natural state.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of this invention, FIG. 2 is an enlarged perspective view of the main parts of the same embodiment, and FIG. 3 is a plan view of an automatic lathe for pipe cutting equipped with the device of the same embodiment. FIG. 4 is a front view of an automatic pipe cutting lathe that is not equipped with an automatic chip removal device. 1...Steel pipe, 2...Turret post, 10...Automatic chip removal device, 11...Chute, 12...Moving table,
13... Advance/retreat drive unit, 14... Rake-shaped claw, 15
... Lifting drive unit, 16 ... Bit, 17 ... Opening, 20 ... Chute top wall, 29 ... Long hole, 3
0...Cuts.

Claims (1)

[Scope of utility model registration request] A cylindrical chute having an opening for receiving chips is provided above the cutting part where the cutting tool is attached with the rake face facing upward, so as to substantially follow the direction in which chips generated by the cutting tool move, and A movable base having a forward and backward drive unit is provided so as to move forward and backward along the chute, and in the forward position of the movable base, the movable base is lowered to a position vertically crossing the opening of the chute, and in the lowered state, the movable base is moved back together with the movable base. An automatic chip removal device comprising: a rake-shaped pawl having an elevating drive unit so as to be raised when the movable table is in a retracted position; and a long hole provided in the upper wall of the chute so that the pawl can be moved back in a lowered state.