JPH0114379Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a device for removing burrs formed at joints of mold tools during mold making, and is used for finishing molds.

(Prior art) Generally, when casting various products, it is necessary to prepare molds such as cores to be used in advance, but according to the shell mode method, for example, these molds are usually made of an upper mold and a lower mold. It is manufactured by filling molding sand called coated sand into a mold and heating and hardening it.
In that case, molding sand gets into the joints of the mold and hardens, which may cause burrs to form around the joints in the mold after demolding.
In order to finish a cast product well, it is necessary to completely remove any burrs that have formed on such a mold beforehand.

Therefore, in the past, a wire or the like was used to scrape off the burrs, but doing this manually was extremely inefficient, and moreover, the burrs were not completely removed, leaving behind so-called burrs. There were some problems that occurred. Therefore, as shown in Fig. 5, a cutting die C with a cutting tool B attached corresponding to the contour shape of the mold A is used, and with the mold burr _A1 applied to the cutting tool B, the mold A is moved downward. (or the cutter B is moved upward), thereby removing the burr _A1 all at once. However, according to such a method, for example, if the thickness of the burr _A1 is large, a large force must be applied to the mold A, and as a result, as shown in the lower part of the figure,
There were problems such as the part _A2 necessary for the mold A being removed, or the mold A cracking and, in the worst case, breaking.

(Purpose of the invention) The present invention deals with the above-mentioned problems when removing burrs formed on a mold, and provides a deburring device that can completely remove burrs formed on the mold without damaging the mold. By providing this, the purpose is to improve the efficiency of this type of deburring work, eliminate quality defects such as damage to the mold and residual burrs, and improve the quality of the mold.

(Structure of the invention) That is, the mold deburring device according to the invention includes a mold feeding means for holding the mold and moving the mold in a direction intersecting a plane in the protruding direction passing through the burr, and a mold moving means by the mold feeding means. The deburring tool is provided with a deburring tool disposed in the middle of the range and having a shape corresponding to the contour shape of the mold, a vibration table that supports the tool, and a vibrator that is connected to the vibration table and vibrates it. It is characterized by. This vibrator is composed of a piston that vibrates approximately parallel to the mold feeding direction by the feeding means, and a fixed cylinder that holds the piston,
The cutting tool is vibrated via the vibrating table in a direction substantially parallel to the feeding direction of the mold, that is, in a direction intersecting a plane in the direction in which the burrs project.

According to this configuration, since the mold passes through a deburring tool having a shape corresponding to the contour of the mold, shearing force is applied to the base of the burr protruding from the peripheral surface of the mold, and the burr is removed. The burr is removed automatically, completely and with high precision, and especially since the cutting tool vibrates approximately parallel to the feeding direction as it passes through the mold, the burr is gradually removed, and therefore a large shear force is generated. The burrs can be effectively removed without causing cracks or cracks in the mold, unlike when removing burrs all at once by adding .

(Example) Examples of the present invention will be described below.

As shown in FIG. 1, the deburring device 1 has a pedestal 2, and the pedestal 2 includes a vibration table 5 disposed on a pedestal 4 supported by legs 3...3;
A workpiece feeding means 6 for holding the workpiece W and moving it downward in the drawing is provided.

The vibration table 5 is supported on the base part 4 via a plurality of springs 7...7, and bolts 8...8 are installed upright on the base part 4 in holes 5a...5a bored at the four corners. are penetrated and are biased downward by springs 9...9 interposed between the heads of the bolts 8...8 and spring bearing members 5b...5b integral with the table 5. The vibration table 5 is capable of vertically vibrating. Further, as shown in FIG. 2, a hole 5c is formed in the center of the vibration table 5 through which the workpiece W (in this case, a core for forming an oil passage of an engine cylinder block) passes through. A plurality of cutting tools 10...10 are arranged around the hole 5c in correspondence with the contour shape of the workpiece W. These cutting tools 10...10 are
They are attached to the vibrating table 5 by being held down by respective cutter holding members 11...11 and tightened with bolts 12...12 from above.

Further, the table portion 4 is equipped with a vibrator 13 that vibrates the vibration table 5. The vibrator 13 includes a cylinder 14 vertically disposed on the lower surface of the base 4, and a piston (not shown) having a piston rod 15 that projects upward from the cylinder 14 and has an upper end connected to the vibration table 5. The piston rod 15 moves up and down when air is supplied and discharged from the cylinder 14 from a separately provided air supply and discharge device, thereby exciting the vibration table 5.

On the other hand, the workpiece feeding means 6 includes a plurality of support pins 16...16 and push-down pins 17...17 provided at corresponding positions on the top and bottom of the gantry 2 to hold the workpiece W, and the push-down pins 17...17. It has an air cylinder 18 attached to the rear part of the pedestal 2 to move it up and down. Each of the above support pins 16
...16 passes through the hole 5c of the vibration table 5, the base 4, and the lower guide plate 19 fixed to the lower surface of the cylinder 14, respectively, and has an upper end projected above the vibration table 5. Also, the pin 1
6...16 are elastically supported by the guide plate 19 and can be moved up and down by having springs 20...20 interposed between the spring receiving parts 16a...16a and the lower guide plate 19, respectively. . Further, the push-down pins 17...17 are suspended from the mounting plate 21 and pass through an upper guide plate 23 installed on the base portion 4 via supports 22...22. The upper end of the piston rod 18a protruding upward from the upper end of the cylinder 18 is coupled to the mounting plate 21, so that the piston rod 18
When a moves downward, the mounting plate 21 and push-down pin 1
7...17 move down integrally, and the pins 17...17
The workpiece W is held between the support pins 16 and 16, and in this state, the workpiece W is further moved downward until it passes through the hole 5c of the table 5. Here, upper guide plate 2
A bolt 24 is provided upright on the upper surface of the mounting plate 21 and serves as a stopper for restricting the downward movement of the workpiece W at a predetermined position. Support pin 16...1
Positioning members 25,
25 have been erected.

Next, the operation of the above embodiment will be explained.

First, with the workpiece W placed on the support pins 16...16 and set at a predetermined position above the vibration table 5, the piston rod 18a of the air cylinder 18 in the workpiece feeding means 6 is moved downward, and the vibration vibrator 1 on table 5
3. At this time, the workpiece feeding means 6
With the downward movement of the rod 18a, the push-down pins 17...17 move downward together with the mounting plate 21 while being guided upwardly, and the pins 17...
. . 17 and the support pins 16 . . . 16 to sandwich the workpiece W. Then, in this state, as the push-down pins 17...17 further move downward, the workpiece W is moved as described above between the two pins 16...16, 17...
While being held between the support pins 17, they are pushed downward against the springs 20...20 that elastically support the support pins 16...16.

The workpiece W passes through a hole 5c provided in the center of the vibration table 5, and at this time, cutting tools 10 are arranged around the hole 5c in accordance with the contour shape of the workpiece W. 10 is attached, the burrs existing around the workpiece W are scraped off by the cutting tools 10...10. In that case, if the cutting tools 10...10 are fixed and the burrs are removed all at once, an unnecessarily large force will be applied to the workpiece W, which may cause the workpiece W to crack or chip. However, since the cutting tools 10 . . . 10 are vertically vibrated integrally with the vibration table 5, cracking of the work W can be prevented. That is, when the workpiece W is about to pass through the hole 5c, as shown in _FIG . At the same time, the workpiece W immediately moves downward at a speed faster than the downward movement speed of the workpiece W. . Then, as shown in Figure b, the cutting tool 10 moves upward again after passing through a state where it is located relatively below the workpiece W, but at this time, the workpiece W is continuously moved downward. As shown in Figure c, the lower part of the burr _W1 is further removed by the cutting tool 10. In this way, the burr _W1 on the workpiece W is removed little by little in multiple steps, so that an unnecessarily large force is not applied to the workpiece W, and the workpiece W is prevented from cracking. This will prevent it from chipping.

Incidentally, as shown in FIG.
b′ and these are made of an elastic member 15 such as rubber.
It may be configured such that they are connected via c', thereby alleviating the impact on the workpiece W during deburring.

(Effects of the invention) As described above, according to the device of the present invention, burrs generated on the circumferential surface of the mold during molding are automatically removed. The deburring is removed by passing through a deburring cutting tool having a shape corresponding to the contour of the deburring material, so it is removed with high precision. The burrs are gradually removed, thereby preventing the mold from cracking or cracking. This not only automates this type of troublesome deburring work, but also eliminates quality defects such as damage to molds and residual burrs that occur during deburring work, making it possible to efficiently manufacture high-quality molds. Become.

[Brief explanation of the drawing]

Figures 1 to 4 show examples of the present invention. Figure 1 is a front view showing the entire deburring device of the present invention, and Figure 2 is a vibrating table cut along the line shown in Figure 1. Transverse plan view showing the surrounding area, Figure 3 a, b,
FIG. 4c is a cross-sectional view of the main part showing the deburring operation according to the present invention over time, and FIG. 4 is a front view of the main part broken away showing another embodiment of the vibrator. Further, FIG. 5 is a sectional view of a main part used to explain the conventional problems. 1... Deburring device, 5... Vibration table, 6
...Mold feeding means (workpiece feeding means), 10...
Cutting tool, 13... vibrator, 14... cylinder, 15... piston rod, W... mold (work), W ₁ ... burr.

Claims (1)

[Scope of utility model registration request] A device for removing burrs formed at joints of mold tools during mold production, comprising: a mold feeding means for holding the mold and moving it in a direction intersecting a plane in a protruding direction passing through the burrs; A deburring cutting tool disposed at a midway position in the moving range of the mold and having a shape corresponding to the contour of the mold, a vibration table that supports the cutting tool, and a vibrating table that gradually removes burrs from the mold. A mold deburring device comprising: a vibrator comprising a piston connected to a piston and vibrating substantially parallel to the feeding means, and a fixed cylinder holding the piston.