JPH0237819B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sprue cutting device for cutting off a sprue attached to a casting at the final stage of a casting process.

[Problems to be solved by conventional technology and invention]

Conventionally, after casting, a worker carried the cooled casting to a metal cutting machine such as a band saw or a hacksaw and set it there, and after cutting the sprue, the casting was taken out and transported to another location.

That is, although the sprue is cut by a mechanism, transporting and removing the castings before and after that, and sorting the cut sprue are done manually, which requires a lot of manpower and is not efficient.

In addition, on the condition that the diameter of the sprue be made so thin that the product part will not be damaged even if the sprue is cut by press, an automatic sprue cutting device is installed that clamps the castings one by one and sequentially passes them through a press cutting machine while forced cooling. This is known (see Japanese Patent Application Laid-open No. 1983-44958).

With this known device, the sprue of the casting must be made narrow as described above, or the sprue flow is poor, and since only one casting can be placed on the transfer table, the sprue of the casting on the transfer table must be cut. The problem was that work efficiency was low because the next casting could not be placed on the casting until after it had been sent to the feed table.

The present invention aims to improve the efficiency of the sprue cutting process by automating the processes before and after the sprue cutting as much as possible.

Another object of the present invention is to provide an efficient sprue cutting device that does not cause damage to the product even when the diameter of the sprue is increased and does not waste time in the sprue cutting process.

[Means to solve the problem]

In front of the cutting section 1A of the bandsaw sprue cutting machine 1, a pallet support 3 rotatable about the vertical axis 2 is arranged, and a pair of casting setting pallets 4A, 4B are mounted on the pallet support 3. and a clamp mechanism 17 that acts on the casting at the sprue cutting position, and each pallet 4A, 4B is provided with a casting mounting guide 14 and a clamp, so that when one pallet 4A is at the sprue cutting position, the other pallet 4B is A drive mechanism 12 is provided to rotate the pallet support 3 so that it is at the casting transfer position, and a conveyor table 5 is provided to carry the castings to the pallet 4B at the transfer position. The casting W2 carried in by the intermittent feed mechanism 6 provided on the conveyor table 5 is set on the other pallet 4B during sprue cutting of W1.

Further, a chute 7 for discharging fallen sprues is provided at the sprue cutting position, and a sorting mechanism 8 is provided in the middle of the chute 7 for sorting the sprues according to the material of the casting.

[Effect]

After casting, the cooled castings are conveyed by a hanger conveyor or other conveyor and placed on the conveyor table 5 in sequence as shown by the chain line W2' in FIG.

Several castings W2' on the conveyor table 5 are pushed toward the pallet 4B waiting at the end of the conveyor table 5 by the reciprocating movement of the intermittent feed mechanism 6, and the leading casting W2' among them is pushed forward toward the pallet 4B waiting at the end of the conveyor table 5. is transferred to the pallet 4B while being guided by the mounting guide section 14, and is fixed to the pallet 4B.

At this time, the other pallet 4A on which the casting W1 was placed and fixed in the previous process is located at the cutting part 1A,
Moreover, the casting W1 is fixed with a clamp 7.
In the illustrated example, the pallet 4A is inverted 90 degrees downward from the horizontal position due to the shape of the casting, the position of the sprue, the cutting direction, etc.

In this state, the cutting machine 1 is operated to cut off the sprue S of the casting W1 on the pallet 4A. The fallen sprue is discharged through chute 7. When the castings are made of different materials, the sorting mechanism 8 is switched to separate the fallen sprues into different materials.

Next, the pallet support 3 supporting both the pallets 4A and 4B rotates, so that the pallet 4A on which the sprue-cut castings are placed is placed on the end of the conveyor table 5, and the pallet 4B on which the other new castings are placed is placed on the pallet 4B. is the cutting part 1
They are respectively located at A, and the next sprue cutting begins.

While the sprue is being cut, the conveyor table 5
Release the sprue-cut castings on the pallet that have arrived at the edge of the pallet.

Then, when the intermittent feed mechanism 6 is operated, the leading casting W2 fed in next pushes out the sprue-cut casting W (shown in the second figure) from the pallet toward the carry-out chute 9 and the conveyor. . Therefore, the next new casting W2 is transferred to the pallet. Thereafter, the above steps are repeated in order.

〔Example〕

The gate cutting machine 1 is a band saw having an endless band saw 11 that rotates in a horizontal plane via a pair of pulleys 10, 10.

The pallet support 3 placed in front of the cutting section 1A of the sprue cutter 1 consists of a box-shaped base 31 and an upper portal frame 32, and is driven by an axis 2 passing through the vertical center of the base 31. It is attached to floor F. Its vertical axis 2
It is equipped with a swing cylinder 12 for reciprocating the pallet support 3 through 180 degrees.

Pallets 4A, 4 are placed on the front and rear surfaces of the box-shaped base 31.
B are mounted so as to be able to be rotated downward by 90 degrees around horizontal shafts 13 and 13, respectively. Each pallet 4A, 4B is provided with mounting guide portions 14, 14 for the casting and a clamp, which is not shown in the figure.

The conversion of the pallets 4A, 4B between the horizontal position and the 90 degree inverted position is effected by means of link arms 16, 16 by two reciprocating cylinders 15, 15, respectively, mounted vertically on the portal frame 32.

The 90 degree inversion position of each pallet 4A, 4B is regulated by bringing the bottom surface of the pallet into contact with the front and rear surfaces of the box-shaped base 31 as a reference surface. The base 31 is equipped with clamps 17, 17 for more reliably holding down the castings on the pallet in the inverted position during sprue cutting. and clamp 17
The operation is performed by a reciprocating cylinder 18.

A positioning pin 19 and its receiving portion 20 are provided oppositely between the pallet support 3 and the floor F to accurately stop one pallet 4A at the sprue cutting position and the other pallet 4B at the casting transfer position. . The positioning pin 19 is moved to the receiving part 20 by the reciprocating cylinder 21.
is entered and exited.

The conveyor table 5 is provided with a sliding guide portion that matches the shape of the casting, but is not shown in the figure.

The intermittent feed mechanism 6 is installed above near the end of the conveyor table 5, and has several hook arms 6 that simultaneously hook onto several castings lined up on the conveyor table 5.
A and is operated by a reciprocating cylinder 22.
The claw 6B at the lower end of the hook arm 6A can swing only in the direction opposite to the direction in which the casting is pushed. This nail 6
B is designed according to the shape and size of the casting. A starting push button 23 of the intermittent feed mechanism 6 is provided on the starting end side of the conveyance table 5.

By operating the push button 23, the intermittent feed mechanism 6 is operated to transfer the casting W2 to the pallet 4B, and when the limit switch confirms that the casting W2 has been fixed, the pallet 4B is reversed downward by the operation of the cylinder 15. At this time, the cutting of the sprue S by the band saw 1 that had been performed on the casting W1 on the pallet 4A on the opposite side is completed.

When the limit switch confirms that the inverted pallet 4B has hit the reference surface of the base 31 of the support body 3, the clamp 17 is activated and grasps the casting W2 on the pallet 4B, and at the same time, the other pallet 4A is
Release the upper casting W1.

When the new clamping of the casting W2 by the clamp 17 is confirmed by the limit switch, the positioning pin 19 that has been engaged until now is disengaged from the receiving part 20, and
The swing cylinder 12 is actuated in response to the electric signal part from which the pin 19 has come off, and when the pallet support 3 has rotated 180 degrees, the positioning pin 19 enters the receiving part 20 of the support 3 again, and the pallet support Prevent rotation of 3.

When the limit switch confirms that the positioning pin 19 and the receiving portion 20 are engaged, the bandsaw 11 descends and the sprue S is cut. When cutting is finished and the band saw lowering end detection switch 24 is closed, the band saw 1
1 rises, closes the rising end detection switch 25, and stops.

On the other hand, when the limit switch confirms the release of the sprue-cut casting by the clamp 17, the cylinder 15 is operated, and the pallet 4A, which had been inverted, is raised horizontally and positioned at the end of the conveyor table 5, and the fixation of the casting to the pallet is released. It will be destroyed. The casting is pushed into the unloading chute 9 by the next casting to be carried in, as described in the section of the above-mentioned operation.

While cutting the sprue of the same model of casting,
Flutter 81 of the sorting mechanism 8 on the dispensing chute 7
to one side and guide the cut sprue to one receiving box 26. When the type of casting is changed, the flapper 81 is switched to the position shown by the chain line by the operation of the cylinder 27, and the discharged sprue is guided to another receiving box 28.

The switching of the sorting mechanism 8 (flapper 81) is as follows:
The worker may check the model of the casting before proceeding, but
A model detecting rod 29 that comes into contact with, for example, a casting sprue is provided in the ascending and descending portion of the bandsaw machine 1, and the difference in models is detected by utilizing the fact that the height of the sprue differs depending on the casting model. The operation switch 30 for the flapper switching cylinder 27 is activated by the movement of the detection rod 29.
Open and close.

〔Effect of the invention〕

The sprue cutting device of the present invention has the configuration described in the claims, namely, a pallet support body equipped with a pair of casting setting pallets, and around the pallet support body, a conveyor table, an intermittent feed mechanism, a bandsaw sprue cutter, a sprue cutter, a band saw, etc. Since a sprue discharging chute with a sorting mechanism is installed, most of the manual work of loading, attaching and unloading castings and sorting sprues on conventional sprue cutters is automated, reducing the number of workers and saving labor.・
This has the effect of speeding up the process.

Furthermore, since the casting that has come to the sprue cutting position is fixed with a clamp and cut with a band saw, the sprue can be cut off without damaging the casting product even if the sprue diameter is large.

A pair of pallets on which castings are placed are provided on a pallet support, and the pallet support rotates so that when one pallet is in the sprue cutting position, the other pallet is in the casting transfer position. While the sprue of the casting on one pallet is being cut, the next casting is placed on the other pallet, so there is no time wasted in the process of setting the casting on the pallet and cutting the sprue. It is.

[Brief explanation of drawings]

FIG. 1 is a front view of the gate cutting device of the present invention, FIG. 2 is a plan view, and FIG. 3 is a partially vertical side view. 1 is a sprue cutter, 2 is a vertical shaft, 3 is a pallet support, 4A and 4B are pallets for setting castings, 5 is a conveyor table, 6 is an intermittent feeding mechanism, 7 is a sprue discharge chute, and 8 is a sorting mechanism.

Claims (1)

[Claims] 1. A pallet support rotatable around a vertical axis is arranged in front of the cutting section of the bandsaw sprue cutting machine, and a pair of casting setting pallets are mounted on the pallet support,
and a clamp mechanism that acts on the casting at the sprue cutting position, and each pallet is equipped with a casting installation guide and a clamp so that when one pallet is at the sprue cutting position, the other pallet is at the casting transfer position. A drive mechanism is provided to rotate the pallet support, and a conveyance table is provided to carry the castings to the pallet at the transfer position. 1. A casting sprue cutting device characterized in that it is configured to set a casting carried in by a feeding mechanism onto the other pallet. 2. In front of the cutting section of the bandsaw sprue cutting machine, a pallet support that can be rotated around a vertical axis is arranged, and a pair of casting setting pallets are mounted on the pallet support.
and a clamp mechanism that acts on the casting at the sprue cutting position, and each pallet is equipped with a casting installation guide and a clamp so that when one pallet is at the sprue cutting position, the other pallet is at the casting transfer position. A drive mechanism is provided to rotate the pallet support, and a conveyance table is provided to carry the castings to the pallet at the transfer position. The castings carried in by the feeding mechanism are set on the other pallet, and the sprue discharging chute attached to the sprue cutting position is equipped with a sorting mechanism for sorting the sprues according to the material of the castings. Features a casting sprue cutting device.