JPH0479767B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to cast products, particularly cast products in which a plurality of products are cast simultaneously through runners branching from one sprue, by cutting the runner. This invention relates to a runner separation device for separating individual products.

[Prior Art] Conventionally, the work of separating such cast products from the runners was done by breaking the runners with a hammer.
Since the ends of the runners remain on the separated product, in the post-process, the product is held down by hand on a table or supported in a vise, and the remaining runners are removed using a glider, etc. Not only was this process time-consuming and time consuming, but it was also dangerous and resulted in large variations in the finished product.

Although it is possible to cut the runner with a saw,
When cutting by moving the saw blade in the vertical and horizontal directions (XY axes), the vertical and horizontal movements must be adjusted for each cutting line of each runner, as the runners branch from one sprue in various directions. In particular, when cutting diagonally, it is difficult to control since it requires vertical and horizontal movement.

In addition, Japanese Utility Model Publication No. 14301/1987 is disclosed as a stopper device for rotating a saw blade, but such a stopper device has a plurality of stopper bolts arranged in an arc shape on a base, and a stopper device for rotating the saw blade. The saw blade is engaged with and held by the stopper bolt by a positioning block that raises and lowers the rotational position of the housing in which the saw blade is mounted by operating a lever.In this way, the saw blade is rotated and the saw blade is positioned by operating the lever. However, when cutting the runners of relatively small cast products, the structure is complicated and unsuitable, and the disadvantage is that precise work cannot be performed.

[Purpose] In view of these points, the present invention makes a work clamping tool that holds a cast product rotatable so that positioning can be performed at a minute angle, and the workpiece in the work clamping tool can be moved by rotation of the work clamping tool. This allows the runner to be cut only by the vertical movement, matching the direction of the saw blade and the horizontal movement to match the position of the saw blade.This makes it possible to safely and reliably separate the cast product from the runner. , which simplifies control and enables automation.

[Example] This will be explained with reference to an embodiment shown in the drawings.

Reference numeral 1 denotes a base, and a saw cutting device 2 is provided at one end. 3 and 4 are slide bases that run on both sides of the base 1 in the cutting direction of the saw blade, 5 is a feed screw screwed into the screw hole of one slide base 3, and 6 is a guide inserted into the other slide base 4. A rod 7 is a longitudinal drive motor that rotates the feed screw 5, and 8 and 9 are provided spanning between the slide bases 3 and 4 on both sides, and are a feed screw and a guide rod that are perpendicular to the feed screw 5 and guide rod 6. , 10 is a slider screwed onto the feed screw 8 and has a guide rod 9 inserted therethrough; 11 is a horizontal drive motor for rotating the feed screw 8; 12 is integrally constructed with the slider 10;
13 is a rotating shaft rotatably provided at the tip of the supporting arm, 14 is a sprocket attached to the rotating shaft 13, and 15 is attached to a vertical shaft 16 passing through the slider 10. 17 is a chain; 18 is a drive motor for the vertical shaft 16;

Reference numeral 20 denotes a workpiece holding tool attached to the rotating shaft 13, which is rotated by a receiving plate 21 fixed to the rotating shaft 13 and a rotating cylinder 22 attached to one end of the receiving plate 21. It is equipped with a plate 23, a positioning pin 25 that is raised and lowered by a positioning cylinder 24 attached to the other end of the receiving plate 21, and clamp claws 28 and 29 that are operated by clamp cylinders 26 and 27, and are brought into contact with both sides of the workpiece. The holding plates 30 and 31 are held together with a workpiece (not shown).

32 is an arc-shaped lock plate attached to the upper surface of the support arm 12, and 33 is the lock plate 32.
A large number of upper locking grooves are provided radially toward the rotating shaft 13. Numerals 34 and 35 are lock pin operating cylinders provided at both ends of the lower surface of the receiving plate 21, and lock pins 36 and 37 are fitted into the locking grooves 33. 4
0 is a saw blade, 41 is a conveyor, 50 is a workpiece, 51
is a cast product, 52 is a runner, 53a, 53b, 53
c and 53d are the cutting lines of the runner.

Note that although the rear part of the saw blade 40 of the saw blade cutting device 2 is shown narrow in the figure, it is actually widened according to the size of the workpiece.

[Operation] The workpiece 50 has a cast product 51 and a runner 52 on the top and bottom.
The holding plates 30 and 31 are placed in a predetermined position on the receiving plate 21 of the workpiece holding tool 20 by applying the holding plates 30 and 31 so as not to cover the connecting parts with the holding plate 23, which is supported at one end by the rotating cylinder 22. The positioning pin 25 of the positioning cylinder 24 is inserted into the positioning hole provided at the other end of the holding plate, and the holding plate 23 is held down by the clamp claws 28 and 29 using the clamping cylinders 26 and 27, and the workpiece 50 is It is firmly held by the clamping tool 20.

Note that holes are provided in the holding plates 30 and 31 to match the workpiece, and positioning protrusions are cast on the workpiece in advance and fitted into the holes in the holding plate to position the holding plate and the workpiece. is good.

Next, the drive motor 18 drives the sprocket 1.
5. The sprocket 14 is rotated through the chain 17, and the workpiece holding tool 2 is supported by the rotation shaft 13.
0 held on this workpiece holding tool 50
Rotate the saw blade so that the cutting line 53 is in the same direction as the saw blade 40, push out one of the lock pins 36 and 37 with the lock pin operating cylinder 34 or 35,
It is fitted into the locking groove 33 of the lock plate 32 fixed to the support arm and fixed in the rotational position. Also,
The feed screw 8 is rotated by the traversing drive motor 11 to cause the workpiece holding tool 20 to traverse together with the support arm 12 of the slider 10, so that the position of the cutting line 53 is aligned with the position of the saw blade 40.

In this state, the feed screw 5 is rotated by the vertical drive motor 7 to cause the slide bases 3 and 4 to travel in the vertical direction, and the workpiece holding tool 20 is vertically fed together with the slider 10 to cut the cutting line 53 of the workpiece 50 with the saw blade. 40 and continue vertical feeding to cut. The cast product 51 separated by cutting is transferred to the conveyor 4.
1 and is carried out.

In the example of the workpiece 50 shown in FIG. 3, after cutting the cutting line 53a by the above-described operation, the slider 10 is immediately pulled back to a position where the workpiece holding tool 20 does not contact the saw blade 40, and the lock pin 36 is pulled up and driven. The work clamping tool 20 is rotated by the motor 18 to align the cutting line 53b with the cutting direction of the saw blade 40, and the slider 10 is moved laterally to align with the saw blade position, and the vertical drive motor 7 moves the slider 10 vertically to cut the cutting line 53b. do. After cutting the cutting line 53b, the work holding tool is moved laterally via the slider 10 by the lateral drive motor 11 to sequentially cut the cutting lines 53c and 53d.

[Effect] As described above, the present invention includes a saw cutting device provided on one side of the base, a slide base that moves vertically on the base along the cutting direction of the saw, and a saw cutting device mounted on the slide base. The slider is provided with a slider that moves laterally across the movement direction of the slide base, and the slider is provided with a support arm that protrudes in the saw cutting direction, and a workpiece clamping tool that is rotatably supported by the support arm, and the workpiece clamping tool is provided with a The rotational position of the tool is maintained by the engagement of the lock pin with a large number of radial locking grooves provided in the lock plate of the support arm, and the direction of cutting the workpiece is aligned and the slider is moved horizontally. Therefore, cutting is performed by adjusting the position of the saw blade and moving it vertically in this state, so the workpiece is held securely by the workpiece clamp and the direction of the cutting line is accurately aligned in the direction of the saw blade with the lock pin. Since the position with the saw blade is adjusted by horizontal movement of the slider, the cutting operation is performed only by vertical movement, making each adjustment simple and controllable.

Therefore, the separation work can be automated by setting the rotation of the workpiece clamping tool, slider and slide base movement according to the workpiece in advance, and there is no need to set longitudinal and horizontal movement in relation to each other. Therefore, it is easy to set up.

In addition, the workpiece can be held securely and the runner can be separated accurately at the base of the connection with the cast product, making the work safer and reducing the number of steps required in the post-process because no runner remains on the cast product. This has the effect of improving yield, improving work efficiency, and improving the work environment.

[Brief explanation of drawings]

FIG. 1 is a top view showing an embodiment of the present invention, FIG. 2 is a side sectional view taken along line A-A, and FIG. 3 is a top view showing an example of a workpiece. 1 is a base, 2 is a saw cutting device, 3 and 4 are slide bases, 7 is a longitudinal drive device (vertical drive motor),
10 is a slider, 11 is a horizontal drive device (traverse drive motor), 12 is a support arm, 20 is a work clamping tool, 40 is a saw blade, 50 is a workpiece, 51 is a cast product, 52 is a runner, and 53 is a cutting device. It is a line.

Claims (1)

[Claims] 1. A slide base that is provided with a saw cutting device at one end of the base and that moves on the base in the cutting direction of the saw;
A longitudinal drive device that runs this slide base,
A slider that moves along with the slide base and moves transversely with respect to the cutting direction, a transverse drive device that makes the slider run, a support arm that integrally projects from the slider toward the saw cutting device, and a support arm that extends along the support arm. A work clamping tool supported rotatably, a lock plate attached to a support arm and having a number of locking grooves directed toward the center of rotation of the work clamping tool, and a lock pin operating cylinder attached to the work clamping tool. A lock pin that is operated and fits into a locking groove of the lock plate is provided, and the runner cutting line of the workpiece held by the workpiece clamping tool is set in the direction of the saw blade by rotation of the workpiece clamping tool and horizontal movement of the slider. A runner cutting device for cast products, characterized in that the workpiece is cut in contact with a saw using a longitudinal drive device according to the position of the workpiece.