JPH04122526A - Electrolytic deburring method for plate shaped press work - Google Patents

Abstract

PURPOSE:To obtain an electrode plate in the same shape as a plate shaped press work with extremely low cost by manufacturing the electrode plate using the same press die which has pressed the plate shaped press work. CONSTITUTION:Using a press die which has pressed a plate shaped press work l having a large number of through holes 4 to be electrolytically deburred, an electrode plate 3 having a large number of through holes 5 in the same shape as this plate shaped press work l is manufactured. Next, this electrode plate 2 is brought into close contact with the plate shaped press work l through an insulating plate and electrolyzed, and the plate shaped press work l is deburred.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to economically and precisely removing burrs around each through hole of a metal plate-shaped pressed product having a large number of through holes. This invention relates to an electrolytic deburring method for plate-shaped pressed products.

(Prior Art) In recent years, for example, with the development of automatic transmissions for automobiles, valve structures for controlling oil pressure have become progressively more complex, and the shape of valve seats for this purpose has also become more complex. Moreover, as the performance of automatic transmissions has improved, the clearance between parts has become smaller, and the requirements for deburring have become increasingly strict. It is now required to be removed.

In addition to valve seats, there is also an increasing demand for completely removing burrs around the large number of intricately formed through holes in pressed metal plate products.

An electrolytic deburring method that selectively dissolves burrs around each through hole has been developed as the most suitable deburring method for this purpose. However, in order to electrolytically remove burrs from a large number of through holes, it is necessary to manufacture electrodes with complex shapes that precisely correspond to the shape of each through hole in the plate-shaped pressed product that is the workpiece. It is not a luxury to produce such electrodes.

Moreover, in order to selectively electrolytically remove burrs, it is desirable to bring them as close together as possible and cover the parts other than the burrs, but this requires an insulator with a shape that corresponds to the electrode. There was also the problem that it was not easy to manufacture. For this reason, using somewhat less precise insulators and widening the distance between the electrode and the workpiece will lead to the problem of requiring high voltage and large current.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and enables reliable deburring of metal plate-shaped pressed products having a large number of through holes at low voltage and low current. This was completed in order to provide a method for electrolytic deburring of plate-shaped pressed products that can be carried out economically.

(Means for Solving the Problems) The present invention, which has been made to achieve the above-mentioned problems, uses a press mold to press a plate-shaped press product having a large number of through holes, which is the object of electrolytic deburring. The method is characterized in that an electrode plate having a large number of through holes having the same shape as this plate-shaped pressed product is manufactured, and electrolysis is carried out with this electrode plate in close contact with the plate-shaped pressed product through an insulating plate. .

As described above, the feature of the present invention is that the electrode plate required for electrolytic deburring is manufactured using the same press die used to press the plate-shaped press product that is the workpiece. Here, one plate-shaped pressed product as a work may be used, or a metal plate suitable for the electrode may be pressed using the same press die.

In addition, in order to manufacture insulating plates, in addition to pressing a plastic plate with the same press mold as the workpiece, there is also a method in which a thin plate-shaped or notebook-shaped insulating material is pasted or lined on the surface of the same metal plate as the workpiece. Furthermore, a laminate of electrode plates and insulating plates can also be produced by pressing with the same press die.

Furthermore, in addition to this, an insulating plate can be obtained by applying an insulating sheet or masking the entire surface of the electrode plate pressed as described above, and then peeling off only the portion corresponding to the through hole. However, this method requires an extra peeling process for only the part corresponding to the through hole, so as mentioned above, the production of the insulating plate is the same as pressing the plate-shaped pressed product as the workpiece, just like the electrode plate. It is more preferable to use a press mold.

The electrode plate obtained in this way is closely attached to the plate-shaped pressed product through an insulating plate, and in this state, an electrolytic solution is applied or an electric current is applied between the plate-shaped pressed product and the electrode plate while being immersed in the electrolyte. flow. This electrode plate has the same shape as the workpiece manufactured using the same press die as the plate-shaped pressed product, and is also used to produce the plate-shaped pressed product through the insulating plate manufactured as described above. Because the electrode plate is in close contact with the workpiece, the current flows concentratedly only in the holes and holes, ensuring melting of the adhesive, and because the distance between the electrode plate and the workpiece is short, high voltage can be applied. do not need.

The present invention will be described in more detail below with reference to the drawings.

(Example) In Fig. 1, (1) is a plate-shaped pressed product with a large number of complicatedly shaped through holes (4) used as a knob sheet for automatic transmissions. It is manufactured by pressing with a press mold.

In addition, (2) is an electrode plate, and (3) is an insulating plate.
) and then press it using the same press die used to press the plate-shaped pressed product (1), thereby forming the electrode plate (2) and the insulating plate (3). A method has been adopted in which the laminates are manufactured all at once. Therefore, a large number of through holes (5) having the same shape and arrangement as the plate-shaped pressed product (1) which is the workpiece are formed in the electrode plate (2) and the insulating plate (3).

Such an electrode plate (2) is an insulating plate (
3), and as is well known, the entire body is immersed in an electrolytic solution such as NaN0i solution, or the electrolyte is soaked in the through-holes (4) and (5). energize while passing it through.

As a result, the current flows concentratedly at the edge portions of the through holes (4) and (5), so that burrs around the through holes (4) of the plate-shaped pressed product (]) inevitably occur due to pressing. (
6) is ensured to be melted and completely deburred.

(Effects of the Invention) As explained above, in the present invention, the electrode plate (2) is manufactured using the same press die used to press the plate-shaped pressed product (1). ]) The electrode plate (2) having the same shape as the electrode plate (2) can be obtained at a very low cost, and the insulating plate (3) can also be manufactured at a low cost.

In addition, in the present invention, since electrolytic deburring is performed by bringing such an electrode plate (2) and a plate-shaped pressed product (1) into close contact with each other via an insulating plate (3), the distance between the electrodes is shortened and It is possible to perform local electrolysis by concentrating the current only on the edges of the through holes (4) and (5), allowing accurate and complete electrolysis with low voltage and small current, and cooling the electrolyte. This means that the amount of energy required can be reduced.

Furthermore, in the present invention, even if the plate-shaped pressed product (1) has a large surface area, the entire surface area can be treated at the same time.

As described above, the present invention can economically and accurately remove burrs around each hole in a metal plate-shaped pressed product having a large number of holes, and is therefore useful for valve seats and other parts. As an electrolytic deburring method suitable for various plate-shaped pressed products having a large number of through holes, there is an extremely significant contribution to the development of industry.

[Brief explanation of the drawing]

The first figure is a perspective view showing an embodiment of the present invention, and the second figure is a sectional view showing the state of electrolytic deburring. (1): Pressed plate product, (2) Electrode plate, (3): Insulating plate, (4), (5): Through hole.

Claims (1)

[Claims] A press mold is used to press a plate-shaped pressed product (1) having a large number of through-holes (4), which is the object of electrolytic deburring. 5) is manufactured, and this electrode plate (2) is replaced with an insulating plate (
3) A method for electrolytically deburring a plate-shaped pressed product, characterized in that electrolysis is carried out in a state in which the plate-shaped pressed product (1) is in close contact with the plate-shaped pressed product (1).