JP6216562B2 - Chip discharge device - Google Patents

Description

  The present invention relates to a chip discharging apparatus.

As an apparatus for discharging chips generated from a machine tool, there is a chip discharging apparatus described in Patent Document 1.
The chip discharging apparatus described in Patent Document 1 is provided with a nozzle that discharges cutting oil on a stepped wall formed in a chip for discharging chips.
Then, the cutting oil is discharged from the nozzle to the scissors and flows, and the chips fallen from the processing portion to the scissors for discharging the scissors are pushed away toward the discharge port of the scissors by the momentum of the flow.

JP 2010-82771 A

The chip discharging apparatus described in Patent Document 1 is a machine that constantly flows cutting oil, and can flow well if the chip is in an appropriate amount.
However, when a large amount of chips are generated due to cutting conditions or the like and falls into the bowl, there may be a case where the cutting oil cannot be flowed due to insufficient fluid pressure of the cutting oil.
In order to cope with this, it is also considered to use a pump with a large output in order to increase the flow pressure, but this increases the cost. Moreover, since generation | occurrence | production of a large amount of swarf does not occur frequently, it cannot be said that it is preferable from a cost-effective viewpoint.
For example, when a large amount of chips generated by processing accumulates on an oil pan of a processing machine, the chips cannot be discharged by being pushed away by a flow.

  Therefore, the problem to be solved by the present invention is to provide a chip discharging device that can discharge well even if a large amount of chips is generated.

In order to solve the above problems, the present invention has the following configuration.
1) In a chip discharging device for discharging chips that have fallen into the oil pan from the processing section of the processing machine,
A tank in a bowl shape capable of storing a certain amount of liquid in a first posture with an opening on the top;
A bracket that supports the tank so as to be rotatable about a predetermined rotation axis between the first posture and a second posture in which the liquid stored in the tank is discharged from the opening. ,
A stopper pin that restricts rotation of the tank around the rotation axis in a first direction and rotation in a second direction opposite to the first direction;
A supply unit for supplying the liquid into the tank;
With
In the first posture, the tank is perpendicular to the vertical direction so that the liquid area increases as the amount of the liquid supplied and stored from the supply unit increases on one side with respect to the vertical plane including the rotation axis. And has an inclined wall
The tank
The center of gravity position when empty is above the rotation axis and on the other side with respect to the vertical plane, and the rotation of the tank in the first direction caused by the center of gravity position of the tank when empty However, while being restricted by the contact of the stopper pin with respect to the first position on one side of the vertical surface at the upper end of the tank, the first posture is maintained,
As the amount of the stored liquid increases , the position of the center of gravity moves to the upper side of the rotation axis and to one side of the vertical surface, and the position of the center of gravity is generated by the movement of the center of gravity position to the one side. Rotation in the second direction around the rotation axis is restricted by the stopper pin contacting the second position on the other side of the first position at the upper end of the tank, and the second posture. It is said that it is said.
2) The liquid stored in the tank is discharged to the oil pan by the rotation in the second direction from the first posture to the second posture, and the widened wall portion is In the posture of 2, the chip discharging apparatus according to 1), which extends along the oil pan.
3) The tank has a bottom wall extending in a substantially horizontal direction in the first posture, and the widened wall portion is substantially parallel to the oil pan in the second posture. 2) The chip discharging apparatus according to 2).
4) The chip discharge device according to any one of 1) to 3), wherein the supply unit supplies the liquid toward the enlarged wall portion.
5) The chip discharging apparatus according to any one of 1) to 4), wherein the processing machine is a band saw.
6) The chip discharging apparatus according to any one of 1) to 5), wherein the liquid is a cutting oil used in the processing machine.

  According to the present invention, it is possible to effectively discharge even if a large amount of chips are generated.

It is a perspective view for demonstrating the loading apparatus RK by which the chip discharge apparatus 51 which is an Example of the chip discharge apparatus which concerns on embodiment of this invention is mounted. It is a perspective view for demonstrating the chip discharge apparatus 51 which is an Example of the chip discharge apparatus which concerns on embodiment of this invention. It is sectional drawing in the S1-S1 position in FIG. 1 for demonstrating the chip discharge | emission apparatus 51. FIG. It is a transverse cross section in the standard posture for explaining tank 1 of chip discharge device 51. FIG. 2 is a cross-sectional view in a fall posture for explaining a tank 1. It is a typical side view for demonstrating the loading apparatus RK and the chip discharge apparatus 51. FIG.

  A chip discharging apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  The chip discharge device 51 is mounted on, for example, a loading / unloading device RK (hereinafter simply referred to as a loading device RK) that supplies materials to the processing device. The processing device is, for example, a band saw machine.

  FIG. 1 is a perspective view showing an appearance of the loading device RK. The loading device RK sandwiches the workpiece W (see FIG. 6) to be cut by the band saw machine between the roller conveying unit RK1 placed to convey the workpiece W (see arrow DRH) and the workpiece on the roller conveying unit RK1. Vice part RK2 to be transferred.

The roller transport unit RK1 is connected to a box-shaped base frame RK3.
An oil pan P is disposed below the roller transport unit RK1. The oil pan P is disposed so as to be inclined so that the end on the base frame RK3 side enters the base frame RK3 and the whole is lowered on the base frame RK3 side. A chip discharging device 51 is provided at a high position of the oil pan P (upper right in FIG. 1).

  A chip conveyor RK3a is disposed inside the base frame RK3. A processing portion K of the band saw machine is located above the base frame RK3. Most of the chips generated by processing at the processing unit K fall from the chip receiving port RK3b of the base frame RK3 to the chip conveyor RK3a inside. A part of the chips is scattered and falls on the oil pan P.

From the chip discharging device 51, the cutting oil Y is discharged intermittently on the oil pan P.
The chips falling on the oil pan P are caused to flow by the cutting oil Y discharged from the chip discharge device 51 onto the oil pan P, and are discharged to the outside via the chip conveyor RK3a.

  The chip discharging device 51 includes a tank 1 and a hinge bracket 3 and a sub bracket 4 that support the tank 1 so as to be rotatable around a rotation axis CL1 via hinge pins 2a and 2b. The tank 1 has a bowl-like shape having an opening 1k that is open at the upper side in the reference posture, with the posture shown in FIGS. 2 and 3 as a reference posture (first posture).

The tank 1 includes a bottom wall portion 1a that extends in a horizontal direction in a reference posture, and a back wall portion 1b that is raised substantially at a right angle from one end (left end in FIG. 2) in the short direction of the bottom wall portion 1a. The widened wall portion 1c raised from the other end of the bottom wall portion 1a (the right end in FIG. 3) at an angle θa with respect to the direction orthogonal to the bottom wall portion 1a, and both end portions in the longitudinal direction of the tank 1 And side wall portions 1d and 1e for closing.
The upper ends 1d1 and 1e1 of the side walls 1d and 1e are formed substantially parallel to the bottom wall 1a. The angle θa is set to about 45 ° to 60 °, for example.
A balance weight 5 is attached to the outer surface of the back wall portion 1b.
As described above, the tank 1 is formed in a bowl shape capable of storing a certain amount of liquid in a reference posture.
Moreover, the surface area (liquid area) of a liquid increases so that the liquid to be stored increases with the expanded wall part 1c.

The hinge bracket 3 includes a side plate 3a for rotatably supporting the tank 1 around the rotation axis CL1 via a hinge pin 2a, a top plate 3b, and a fixing plate 3c for fixing the fixed member A to the fixed member A with a bolt or the like. ,have.
A stopper pin 6a is attached to the side plate 3a at a predetermined position.
The stopper pin 6a abuts against the upper end 1e1 of the side wall 1e when the tank 1 is in the reference posture, and restricts the counterclockwise rotation of the tank 1 around the rotation axis CL1 in FIG. ing.

The top plate 3b is provided with a discharge unit 7 that discharges, for example, cutting oil of a processing machine toward the tank 1 as a liquid.
Specifically, a branch pipe 7a branched from the cutting oil pipe of the processing machine is connected to the discharge section 7, and cutting is performed from the discharge section 7 toward the lower tank 1 by the operation of the coolant pump of the processing machine. Oil Y is supplied. That is, the discharge unit 7 functions as a liquid supply unit that supplies, for example, cutting oil Y as a liquid to the tank 1.
You may provide the throttle valve 8 which adjusts the flow volume of the cutting oil Y to discharge between the discharge part 7 and the branch piping 7a. When the throttle valve 8 is provided, the time for storing the cutting oil Y in the tank 1 can be freely adjusted by opening and closing the throttle valve 8. Thereby, the time interval which discharges the accumulated cutting oil Y can be adjusted.
The position where the discharge unit 7 is provided is directly above the widened wall portion 1c when the tank 1 is in the reference posture. This position may be directly above the bottom wall 1a.

The sub bracket 4 includes a side plate 4a that supports the tank 1 rotatably around the rotation axis CL1 via a hinge pin 2b, and a fixing plate 4c that is fixed to the fixed member A with a bolt or the like. Yes.
A stopper pin 6b is attached to the side plate 4a at a position corresponding to the stopper pin 6a of the side plate 3a.
Accordingly, when the tank 1 is in the reference posture, the upper ends 1d1 and 1e1 of the side wall portions 1d and 1e are in contact with the stopper pins 6b and 6a, respectively, to restrict the counterclockwise rotation in FIG.

  Next, the rotation of the tank 1 around the rotation axis CL1 will be described in detail.

As shown in FIG. 4, the horizontal position of the rotation axis CL <b> 1 is such that when the tank 1 is set to a reference posture which is a posture in which the bottom wall portion 1 a extends horizontally in an empty state. And the vertical surface LG including the barycentric position G of the member that combines the balance weight 5 and the balance wall 5 are set so as to be on the side of the expanded wall portion 1c (the right side in FIG. 4). Here, in the reference posture, a position where the upper end 1e1 of the side wall 1e contacts the stopper pin 6a is referred to as a reference posture restriction position Pt1.
Further, the vertical position of the rotation axis CL <b> 1 is set lower than the gravity center position G. Hereinafter, a vertical plane including the rotation axis CL1 is defined as a vertical plane LL.

When the coolant pump of the processing machine is operated in a state where the tank 1 is in the reference posture and the cutting oil Y is discharged from the discharge portion 7 toward the tank 1, the cutting oil Y accumulates in the tank 1 and the oil level Ha gradually increases. To rise.
On the other hand, when the processing is performed in the processing unit K, the chip K1 falls from the processing unit K and is stored in the tank 1.
The cross-sectional shape of the tank 1 is expanded in the horizontal direction as it goes upward because the widened wall portion 1c is inclined at an angle θa.
Therefore, when the cutting oil Y accumulates in the tank 1 and the oil level Ha rises, the gravity center position G moves toward the upper side (upper right in FIG. 4) of the enlarged wall portion 1c as indicated by the arrow DR1.

By this movement, when the center of gravity position G passes the vertical wall LL and enters the other side of the enlarged wall portion 1c, the tank 1 rotates together with the balance weight 5 in the clockwise direction of FIG. 4 about the rotation axis CL1. (Arrow DR2). Hereinafter, this rotation is also referred to as “falling”.
In this fall, the center-of-gravity position G exceeds the vertical plane LL at a high position above the position of the rotation axis CL1.
Accordingly, the moment increases as the rotation angle increases and the rotation angle increases, and the rotation speed increases. Therefore, the tank 1 is overturned vigorously.

The stored cutting oil Y is discharged to the upper surface of the oil pan P when the tank 1 falls. By this discharge, the chips K1 that fall on the oil pan P and are accumulated are washed away.
FIG. 5 is a diagram showing a state of the falling posture (second posture) in which the tank 1 has fallen.
The tank 1 is toppled over the stopper pin 6a and the stopper pin 6b, with the upper ends 1e1 and 1d1 of the side wall portions 1e and 1d being different from the reference posture regulating position Pt1 and being on the back wall portion 1b side. It is regulated by abutting at the position Pt2, and the falling posture (turning angle θb) is determined.
That is, in the chip discharge device 51, both the reference posture and the falling posture of the tank 1 are regulated by the same stopper pin. Therefore, the structure is simple and the cost increase is suppressed.
In addition, when the tank 1 needs to be adjusted when the balance returns from the falling posture to the reference posture, the position of the stopper pins 6a and 6b may be adjusted.

When the stored cutting oil Y is discharged to the oil pan P due to the fall of the tank 1, the tank 1 becomes empty, and the gravity center position G moves again to the back wall portion 1b side and exceeds the vertical plane LL.
By this movement of the center of gravity, the tank 1 is rotated in the direction of the broken line arrow DR3, and the upper ends 1d1 and 1e1 of the side walls 1d and 1e are rotated by contacting the stopper pins 6b and 6a at the reference posture regulation position Pt1. It is regulated and becomes the standard posture again.

Since the cutting oil Y is continuously supplied to the tank 1 that has returned to the reference posture as long as the coolant pump is in operation, the tank 1 automatically changes between the state of the falling posture and the state of the reference posture. Transition.
Thereby, the chips K1 on the oil pan P are automatically and intermittently discharged from the oil pan P.

  As described above, since the tank 1 falls down vigorously, the cutting oil Y flows on the oil pan P vigorously. As a result, even if a large amount of chips are accumulated on the oil pan P, it is discharged from the oil pan P together with the cutting oil Y.

Here, the falling posture of the tank 1 is set so that the posture of the expanded wall portion 1c is substantially horizontal.
Further, when the oil pan P is inclined, it is better that the oil pan P is set to be substantially parallel to the oil pan P.

Thereby, the vertical distance Da between the upper surface position of the oil pan P and the lower surface position of the enlarged wall portion 1c shown in FIG. 5 can be set to be extremely small.
Therefore, the chip discharging device 51 can be installed even if the vertical gap between the roller transport unit RK1 and the oil pan P is narrow, and is highly versatile.

Further, since the cutting oil Y is discharged along the upper surface of the oil pan P, the chips K1 on the oil pan P are discharged smoothly without disturbing the flow, although the discharging force is strong.
As a result, it is difficult for the droplets to splash during discharge, and no large waves are generated in the flow of the discharged cutting oil Y. Therefore, scattering of the cutting oil Y to the outside of the oil pan P and adhesion to surrounding members are suppressed. Maintenance work such as disassembly and cleaning becomes easy.
Further, when the throttle valve 8 is provided, the rotation interval to the fall posture can be adjusted by changing the opening degree. That is, the time interval for discharging the accumulated cutting oil Y can be adjusted.

As described above, the chip discharging device 51 can be configured to have a small vertical dimension, so that it can be easily mounted on various processing machines, but is particularly suitable for a band saw.
FIG. 6 is a schematic side view (partial cross section) showing a loading device RK and a chip discharging device 51 applied to the band saw.
In the roller transport unit RK1, the workpiece W is transported toward the left processing unit K while being sandwiched by the vice unit RK2 on the pass line PL serving as a reference height.
An oil pan P is disposed below the roller conveyance unit RK1. Further, a chip conveyor RK3a is arranged on the left side of the oil pan P in FIG.
A processing portion K including a saw blade N is located above the chip conveyor RK3a.
Since the position of the pass line PL is difficult to move upward due to the construction of the machine, when the chip discharging device 51 is mounted, it is necessary to fit in the limited narrow space between the roller transport unit RK1 and the oil pan P. There is.
Since the chip discharging apparatus 51 of the embodiment has a small occupied dimension in the vertical direction, it is easy to fit in this narrow space.

The chip discharging device 51 can make a flow of the cutting oil Y at a high pressure by overturning the tank 1 without using a pump with a large output for increasing the momentum of the cutting oil when discharging the chip K1. .
Therefore, an increase in cost is suppressed.

  Since the chip discharging device 51 is configured to support both ends of the tank 1, the length L1 (see FIG. 2) in the longitudinal direction of the tank 1 can be freely set.

The chip discharging device 51 is configured to attach the discharge portion 7 of the cutting oil Y supplied to the tank 1 to the hinge bracket 3 that rotatably supports the tank 1.
Therefore, the hinge bracket 3 can be shared regardless of the length of the tank 1 in the longitudinal direction, cost increase is suppressed, and high cost effectiveness is obtained.

The chip discharging device 51 may be configured to supply the cutting oil Y supplied to the tank 1 toward the inclined wall portion 1c.
Thereby, the supplied cutting oil Y is smoothly stored in the tank 1 without splashing, the cutting oil Y does not overflow from the tank 1, the peripheral members are not easily contaminated, and the maintenance work is facilitated.

  The position of the center of gravity in the empty state of the tank 1 and the state in which the cutting oil Y is stored, the storage capacity of the cutting oil Y in the tank 1, the angle θa of the widened wall portion 1c, the rotation angle θb in the falling position, etc. By appropriately setting and selecting the cross-sectional shape, material, balance weight mass, and the like, it is possible to freely set within a range in which the state transition between the reference posture and the falling posture can be satisfactorily performed by moving the center of gravity.

The embodiments of the present invention are not limited to the above-described configuration, and modifications may be made without departing from the spirit of the present invention.
The throttle amount of the throttle valve 8 may be varied according to the attitude of the tank 1.
For example, when the tank 1 is in the reference posture, the supply amount of the cutting oil Y is reduced to some extent, and when the tank 1 starts to fall, the supply amount of the cutting oil Y is increased by opening the tank 1 and the cutting oil Y is expanded. The fall of the tank 1 may be accelerated by energizing the wall 1c.
Thereby, the momentum of the fall of the tank 1 increases more, the discharge flow pressure of the cutting oil Y rises, and a large amount of chips can be pushed away more reliably.
The liquid stored in the tank 1 is not limited to the cutting oil Y.

DESCRIPTION OF SYMBOLS 1 Tank 1a Bottom wall part, 1b Back wall part, 1c Wide wall part 1d, 1e Side wall part, 1d1, 1e1 Upper end, 1k Opening part 2a, 2b Hinge pin 3 Hinge bracket 3a Side plate, 3b Top plate, 3c Fixing plate 4 Sub bracket 4a Side plate, 4c Fixed plate 5 Balance weight 6a, 6b Stopper pin 7 Discharge part, 7a Branch pipe 8 Throttle valve 51 Chip discharge device 52 Band saw A Fixed member CL1 Rotating axis Da Distance G Center of gravity Ha Oil level K Processing Part, K1 chips LG, LL vertical surface, L1 length N saw blade P oil pan, PL pass line Pt1 reference posture restriction position, Pt2 tipping restriction position RK loading device (loading / unloading device)
RK1 Roller conveying unit, RK2 vice unit, RK3 base frame RK3a chip conveyor, RK3b chip receiving port Y cutting oil W material to be cut θa angle, θb rotation angle

Claims (6)

In the chip discharging device for discharging chips that have fallen into the oil pan from the processing section of the processing machine,
A tank in a bowl shape capable of storing a certain amount of liquid in a first posture with an opening on the top;
A bracket that supports the tank so as to be rotatable about a predetermined rotation axis between the first posture and a second posture in which the liquid stored in the tank is discharged from the opening. ,
A stopper pin that restricts rotation of the tank around the rotation axis in a first direction and rotation in a second direction opposite to the first direction;
A supply unit for supplying the liquid into the tank;
With
In the first posture, the tank is perpendicular to the vertical direction so that the liquid area increases as the amount of the liquid supplied and stored from the supply unit increases on one side with respect to the vertical plane including the rotation axis. And has an inclined wall
The tank
The center of gravity position when empty is above the rotation axis and on the other side with respect to the vertical plane, and the rotation of the tank in the first direction caused by the center of gravity position of the tank when empty However, while being restricted by the contact of the stopper pin with respect to the first position on one side of the vertical surface at the upper end of the tank, the first posture is maintained,
As the amount of the stored liquid increases , the position of the center of gravity moves to the upper side of the rotation axis and to one side of the vertical surface, and the position of the center of gravity is generated by the movement of the center of gravity position to the one side. Rotation in the second direction around the rotation axis is restricted by the stopper pin contacting the second position on the other side of the first position at the upper end of the tank, and the second posture. A chip discharging device characterized by that. The liquid stored in the tank is discharged to the oil pan by the rotation in the second direction from the first posture to the second posture, and the enlarged wall portion is 2. The chip discharging apparatus according to claim 1, wherein the chip discharging apparatus extends along the oil pan in a posture. The tank has a bottom wall extending in a substantially horizontal direction in the first posture, and the enlarged wall portion is substantially parallel to the oil pan in the second posture. Item 2. A chip discharging apparatus according to Item 2.   The chip discharge device according to any one of claims 1 to 3, wherein the supply unit supplies the liquid toward the enlarged wall portion.   The chip discharging apparatus according to any one of claims 1 to 4, wherein the processing machine is a band saw machine.   The chip discharging apparatus according to any one of claims 1 to 5, wherein the liquid is a cutting oil used in the processing machine.

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