JPH0225742B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a powder metallurgy process in which metal products are manufactured by compressing and sintering metal powder. This invention relates to a rotary burr removal device used in the process.

[Prior art]

In the compression process of powder metallurgy, which manufactures metal products by compressing and sintering metal powder, burrs are caused when metal powder gets into the clearance between the outer die and the punch when the metal powder is formed using a press die. caused by something. Since burrs generated on the molded body not only deteriorate the quality of the product but also affect the originally expected effects of the product, it is necessary to remove them before and after sintering the molded body.

Conventionally, burrs have been removed by manually scraping off the pre-sintered compact with a brush. In addition, as a device for mechanically removing burrs, there is a device in which the sintered compact is placed in a barrel together with stones if necessary, and this barrel rotates to scrape off the burrs on the compact. By pressing the sintered compact with a press die,
There are devices that crush burrs on molded bodies.

[Problem that the invention seeks to solve]

By the way, the work of removing burrs by hand has the problem that the work cannot keep up with the production of products that are produced in large quantities, and the production cost increases due to the labor costs for the work.
Since the work is done by humans, there is a risk of leaving burrs behind.

In addition, in a burr removal device using a barrel, the molded bodies are damaged due to contact with each other or with stones, and the removed burrs are attached again by the molded bodies or stones. The disadvantage is that dust in the barrel also adheres to the molded body, and a cleaning step must be added to remove the dust that has adhered to the molded body.

Furthermore, using a device for crushing burrs on a molded body using a pressing die adds a compression molding process, which poses a problem in that it requires a large burden on equipment.

This invention has been made in view of the above-mentioned circumstances, and the problem is how to realize a burr removal device for molded bodies that can eliminate the above-mentioned drawbacks.

[Means for solving problems]

The present invention relates to a rotating body formed by forming a mesh plate into a cylindrical shape with both ends open, and a protrusion formed on an inner wall of the rotating body extending along an axial direction from one opening to the other opening. and a supporting part consisting of a pair of left and right rollers installed with their axes inclined with respect to the horizontal direction and supporting the rotating body on the upper part with the axes parallel to each other, and rotating the roller to rotate the rotating body. The driving device is a component.

[Effect]

According to this invention, as the rotating body is rotated by the drive device, the molded article placed inside the rotating body is lifted up to an appropriate height by the rotating body and then dropped. This process is repeated several times until the molded body comes out of the rotating body. During this process, the molded body comes into contact with the net-like wall, and some of the molded bodies The contact removes burrs. The burrs removed from the compact pass through between the net-like wall and the rollers and fall. On the other hand, since the rotating body is supported so that its axis is inclined with respect to the horizontal direction, as the rotating body rotates, the molded body moves inside the rotating body from one opening to the other. , and also during this movement, burrs are removed from the molded body.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. Figures 1 and 2 are rotary burr removal equipment A.
FIG.

In FIGS. 1 and 2, reference numeral 1 indicates a support portion. The support part 1 includes a base 2, bearings 3 and 4 fixed to the base 2, two parallel shafts 5 and 5 supported by the bearings 3 and 4, one end of the shafts 5 and 5, and the bearing 3. , rollers 6 fixed between 4,
It is composed of 6, 7, and 7. This support part 1
A rotating body 8 is supported so as to be inclined with respect to the axial direction. The rotating body 8 is a cylindrical body, and its wall portion 9 is formed in a net shape, and the inner wall of the rotating body 8 extends along the axial direction from one opening 10 of the rotating body 8 to the other opening 11. A protrusion 12 is formed. Further, the base 2 includes a motor 13.
A pulley 15 is fixed to the tip of a rotating shaft 14 of a motor 13, and belts 16, 16 are wound between the pulley 15 and the rollers 6, 6, respectively.

With these configurations, the rotating body 8 is rotatable by being placed on the rollers 7, 7 and the belts 16, 16 wound around the rollers 6, 6. Further, as the rotating shaft 14 of the motor 13 rotates, the rollers 6, 6, 7, 7 rotate via the pulley 15 and the belts 16, 16, and this rotation causes the rollers 7, 7 and the belt 16, The rotating body 8 in contact with the roller 16 is rotated by the friction between the rollers 7, 7 and the belts 16, 16. Furthermore, the motor 13 is controllable, and the rotational speed of the rotating body 8 can be controlled.

The usage of the rotary burr removing device A having the above configuration will be explained.

First, by starting the motor 13, the rotating body 8 rotates as shown by arrow a. The rotational speed of the rotating body 8 at this time is adjusted by the motor 13. Next, as shown by arrow b, the molded body before sintering is put into the rotating body 8 through the opening 10. The molded body entering the rotating body 8 is lifted up by the protrusion 12, and when lifted to an appropriate height, the molded body falls. While repeating this several times, that is, while the molded body performs a rocking motion within the rotary body 8, the molded body moves within the rotary body 8. This rocking motion brings the molded body into contact with the wall, thereby removing burrs. Furthermore, burrs are also removed by contact between the molded bodies. The burrs removed from the compact pass through the net-like wall and between the rollers 6, 6, 7, and 7 and fall. ). The molded product that has completed the above steps pops out from the rotary body 8 as shown by arrow c, and a belt conveyor (not shown) attached to the lower part of the opening 11 carries this protruded molded product to the next process. carry.

In the rotary burr removal device A as described above,
The cylindrical rotating body 8 rotatably supported by the support part 1 has a protrusion 12 formed along the axial direction of its inner wall from one opening 10 to the other opening 11, and is rotatable. The rotational movement of the body 8 is performed by a motor 13;
3, it is possible to remove burrs even from a molded product with a large amount of burrs, and it is also possible to remove burrs without damaging the molded product. Furthermore, since the axis of the rotating body 8 is inclined with respect to the horizontal direction, the molded body can be continuously moved inside the rotating body 8 by the rotation of the rotating body 8 and the control of the motor 13. Therefore, there is no delay in the same process.Furthermore, since the wall portion 9 of the rotating body 8 is formed in a mesh shape, burrs removed by contact with the mesh, or as mentioned above, The burrs can be removed without the burrs removed in the previous step re-adhering to the molded body, and the present invention has advantages such as a small burden on the equipment in terms of effectiveness.

〔Effect of the invention〕

According to the present invention, there is provided a rotating body formed by forming a mesh plate into an annular shape with openings at both ends, and a protrusion formed on the inner wall of the rotating body extending along the axial direction from one opening to the other opening. a support part consisting of a pair of left and right rollers installed with their axes inclined with respect to the horizontal direction and supporting the rotary body on the upper part with the axes parallel to each other; and a support part consisting of a roller that supports the rotary body with the axes parallel to each other, and the rotary body is rotated by rotating the roller. The following effects can be obtained by adopting a configuration including a drive device for causing In other words, it is possible to process a workpiece whose strength is not very high, such as a powder compact, without adding abrasives or the like and without damaging the compact due to contact with the wall and contact between the compacts.
Burrs can be removed efficiently. By passing the slanted cylindrical rotating body through it, burrs can be removed while moving continuously, so there is no delay in the burr removal process. This prevents removed burrs and dust from adhering to the molded product.
In addition, the device is simple and the operating cost including equipment cost and maintenance is low.

[Brief explanation of drawings]

1 and 2 are diagrams showing the configuration of a rotary burr removing device shown as an embodiment of the present invention, and FIG. 1 is a perspective view showing the entire configuration;
FIG. 2 is a sectional view thereof. A...Rotary burr removal device, 1...Support part,
6, 7...roller, 8...rotating body, 13...motor, 16...belt.

Claims (1)

[Claims] 1 A rotating body formed by forming a mesh plate into a cylindrical shape with both ends open, a protrusion formed on the inner wall of this rotating body extending along the axial direction from one opening to the other opening, and an axial line a support section comprising a pair of left and right rollers installed at an angle with respect to the horizontal direction and supporting the rotary body on the upper part with the axes parallel to each other; and a drive device that rotates the rotary body by rotating the rollers. A rotary burr removal device characterized by comprising: