JPH0366426A - Position adjustable press die for metallic foil - Google Patents

Abstract

PURPOSE:To simply adjust unbalance of clearance by making the relative position to each holder of a punch in the punch holder or a die in the die holder adjustable. CONSTITUTION:When it is applied to a die with which the rectangular is punched, a support 15 for adjustment is provided on the die holder 12 and the support 15 and the die 11 are mechanically connected. In this case, a die 11, liner 17, press plate 16, adjusting bolt 18 and support 15 are provided. Horizontal force due to tightening the bolt is applied to the die and horizontal displacement of die, that is, the change of the relative position to the punch is generated due to elastic deformation. To obtain necessary displacement quantity, also the change and selection of the size and number of the bolt and the size of the support, etc. are reqired. By this way, unbalance that is generated from various errors of the press, etc. can be simply adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a press mold for punching, etc., mainly of thin materials having a thickness of several tens of plates.

(Prior art) Conventionally, punching presses have been used to produce large products for automobiles,
It is widely used for small products such as C lead frames, and many molds are used. In recent years, due to the expansion of the target product range, the plate thickness has become thinner and thinner, to 100.50°30-.

In such press technology, one of the factors that determines the quality of the product is the clearance s, s' between the punch 1 and die 2, as shown in Figure 2, and it is important to keep this clearance at an optimal value. According to the cut section of material 3,
It is possible to obtain a product with a beautiful sheared surface without so-called burrs or sag.

This clearance is generally considered to be 5 to 10% of the plate thickness, but this value becomes more difficult to achieve in practice as the thickness of the material to be punched becomes smaller.

For example, in the case of a plate thickness of 111, the appropriate clearance is 50 to 1 oots, and the clearance accuracy is a value that can be sufficiently coupled from the current tool machining accuracy and mold assembly accuracy. However, in the case of a 30-foil, for example, the clearance is 1.5-3 m, and it becomes very difficult to achieve this value. The reason for this is, firstly, it is difficult to obtain such machining accuracy for the punch and die, and secondly, even if such machining accuracy could be obtained, the die and punch for the die set are difficult to obtain. This is because it is difficult to obtain clearance accuracy in assembly accuracy or actual punching work.

That is, as schematically shown in FIG. 3, the die 5 is attached to the die holder 6, the punch 7 is attached to the punch holder 8, and both are connected by the guide post lO. In addition to this, there are various parts such as bushings, and there are always gaps between them.

Therefore, after final assembly or during actual punching work, play will inevitably occur due to differences in the structure of the press, and the two clearances s and s' in one cross section shown in Fig. There is no necessity for them to be the same, and there is always a bias towards one or the other.

Therefore, even if one side is sheared normally, the clearance on the other side is large and a normal end face shape cannot be obtained in many cases. However, in such cases, there is no means for adjusting the relative positional relationship between the punch and die in the mold, and adjustments are made through trial and error by re-dimensioning or reassembling the punch or die, but the essential It is not a suitable means of adjustment.

(Problems to be Solved by the Invention) The present invention attempts to solve these problems by using a mold having proper means for adjusting the relative positions of the punch and die.

(Means for Solving the Problem) The present invention is a metal foil press mold in which the relative position of a punch in a punch holder or a die in a die holder can be adjusted relative to each holder. This is a metal foil press mold whose position can be adjusted, with an adjustment device having a mechanical means for changing the position such as an adjustment bolt, or an adjustment device using thermal expansion of the liner provided between the two.

The present invention will be explained in detail below.

The present invention is intended for cases where the thickness of the material is several tens of meters thick and the clearance needs to be adjusted with an accuracy of several tens of meters.In this case, the die position relative to the die holder or the punch position relative to the punch holder The position is based on the fact that by applying lateral forces to these structures elastic deformations occur and it is quite possible to change the displacement by several ρ.

FIG. 1 shows a schematic diagram of a die and a die holder when the present invention is applied to a rectangular punching die.

The die 11 is mechanically fixed to a die holder 12.

In the present invention, the die holder is provided with an adjustment support 15,
The support base 15 and the die 11 are mechanically coupled.

In this example, die 11. It consists of a liner 17, a press plate 16, an adjustment bolt 18, and a support stand i5.

By tightening the bolt, a lateral force is applied to the die,
The elastic deformation causes a lateral displacement of the die, ie a change in its position relative to the punch. Of course, the amount of displacement depends on the relative relationship between the rigidity of the die fixed to the die holder and the rigidity of the support base fixed to the die holder. It is also necessary to change and select the size, number, size of die support, etc.

Furthermore, as another method, an electric or cooling water heating device is installed around or inside the liner 15 without using an adjustment bolt, and the temperature of the liner is adjusted. It is also possible to apply a directional force to cause displacement of the die.

In either method, it is desirable to provide an adjustment device so that it can be adjusted not only in one fixed direction but in two directions.
Further, a plurality of them may be provided in one direction. Also, whether to move the punch or the die is determined by how easy it is to handle.
Each may be adjustable in different directions, and may be movable in two directions at the same time.

(Example) A rectangle with a width of 5 mm and a length of 1 Om+e was punched out of 50 mm stainless steel foil. As a result of measuring the machining accuracy of the punch and die, the clearance was within 10μ.

However, as a result of the punching work, the clearance was uneven in the width direction, and although one end face was relatively beautiful, the remaining end faces had large burrs and the desired properties could not be obtained.

Therefore, based on the results of initial punching using the unidirectionally adjustable mold according to the present invention, the relative position of the die with respect to the punch was adjusted, and as a result, both end faces were free of burrs.
A beautiful end surface was obtained. The adjustment was done with bolts, and the liner was made of hard plastic.

(Effects of the Invention) According to the present invention, in the press operation of several tens of plate thicknesses,
It has become possible to easily adjust the unbalance of clearance caused by poor mold assembly accuracy and various errors in the press during actual punching work.

[Brief explanation of drawings]

Fig. 1 shows an example of application of the present invention, (a) is a plan view, (b) is a sectional view taken along line A-B, Fig. 2 is an explanatory diagram of the die, punch, and clearance, and Fig. 3 is a conventional die. , (a) is a plan view, and (b) is a sectional view taken along line A-B. 1: Punch 2: Die 3; Material 4: Presser foot s, s': Clearance 5, 11: Die 6. 12: Die holder 7 = Punch 8: Punch holder 9 = Presser plate 10, 14 Ni guide boss
13: Punch 15: Support stand IB:
Holding plate 17: Liner 18: Adjustment bolt representative Patent attorney Tate Chanoki Mistake 1 Figure 2 Figure 3 (b)

Claims (1)

[Claims] 1. A metal foil press mold in which the relative position of a punch in a punch holder or a die in a die holder relative to each holder can be adjusted. 2. The position-adjustable metal foil press mold according to claim 1, further comprising an adjustment device having a mechanical means for changing the position, such as an adjustment bolt, between the punch or die and each holder. 3. The position-adjustable metal foil press mold according to claim 1, further comprising an adjustment device using thermal expansion of the liner.