JPS6120634A - Clamping method of thin plate-shaped bent parts - Google Patents

Abstract

PURPOSE:To improve the clamping accuracy of parts by clamping thin plate- shaped bent parts and thin plate-shaped parts in a state that they have been superposed lightly, and subsequently, releasing once a rolling reduction of the bent parts side, and thereafter, executing the rolling reduction again, and clamping them again. CONSTITUTION:A thin plate-shaped bent member A is aligned with a pin (b) on a reference plane 1, and also positioned by pins (b), (c) by superposing thin plate parts B. The upper part of the pins (b), (c) is covered softly with a clamping member (d), and a gap (g) is provided with respect to parts B. Subsequently, the parts A are pressed down by a member (e). In this case, the left half part of A is adhered tightly to the plane 1, but the right half part is not fixed due to the gap (g). Also, the parts B, A are clamped by the member (d), the member (e) is slightly raised and the distortion is released, and thereafter, it is depressed again and the parts A are clamped again. According to this method, the clamping can be executed exactly without damaging the parts A, B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for correctly aligning and clamping a thin plate-shaped bent part A having spring elasticity to a thin plate-shaped or plate-shaped part B. It is something.

[Background of the invention]

When properly positioning two flat parts and clamping them in a state where they are partially overlapped, a known technique can be used to avoid problems with separate installation.

FIG. 1 shows that in the prior art, two thin plate parts A/,
Position n / with three positioning pins &, , e, and two clamp members a.

This is an explanatory diagram of the method of clamping the above-mentioned parts by pressing them against the reference plane 1 using a mouth. Positioning holes are provided in each of the sound β parts A' and B', and part A' is placed on the reference plane. positioning pin a,
The part B' is also positioned by the positioning pins b,
It is positioned at c.

The clamp member A is pivotally supported by the shaft 2, and the clamp member mouth is rotatably driven by the shaft 3, respectively.
/ It is now possible to hold down and release the AI.

However, when one of the parts is a thin plate-shaped bending part (not a planar thin plate-shaped part) having spring elasticity, such as part A shown in FIG.
If you try to bend it into a flat shape as shown in A" and align it with the positioning pin a, a difficult technical problem will arise.

That is, when the bent part A is stretched into a flat plate shape A'', a horizontal force acts to cause distortion in the bent part A.

For this reason, highly accurate positioning is difficult. Further, since the positioning hole A-2 provided in the bent part A sags when fitting with the positioning pin a, deformation is induced in the other part B. This phenomenon becomes a particularly serious problem in thin plates having a thickness of about I μm to 76 μm.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and uses conventional clamping machines to accurately bend thin plate parts and thin plate parts without the risk of damaging the target parts. The aim is to provide a method that can be aligned and clamped.

[Summary of the invention]

In order to achieve the above object, the method of the present invention is based on a method in which a thin plate-shaped bending part A having spring elasticity is installed on a reference plane.
In the method of positioning with the book positioning pins a and b, and also planting the thin plate-shaped part B on the reference plane and positioning and clamping with the two positioning pins b and c, (if Fit the positioning pin b into the positioning hole, (i1) Lay the part B on top of the bent part A, fit the positioning pins b and c into the positioning hole provided in the part B, and (river) positioning. Part B is loosely covered by a clamp member A that is shaped to cover pins b and c but does not hang on positioning pin a, and (iv) the bent part A is held down with the clamp member mouth that is shaped to cover positioning pin a. ■) Clamp part B and bend part A using the clamp member A mentioned above.
Press and clamp the (vi)
l It is characterized in that the bent part A is once released by being rolled down by the clamp member opening, and then rolled down again and clamped again.

[Embodiments of the invention]

Next, an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

As shown in FIG. 3, the bending part A is placed on the reference plane 1 with its positioning holes aligned with the positioning pins b, and the part B is superimposed thereon and positioned in accordance with the positioning pins b and C. In this state, the positioning hole A-2 of the bent part A is separated from the reference plane 1 and also from the positioning pin a.

In this state, hold the positioning pin b with the clamp member a.

Gently cover the upper part of part C, and provide a gap g with respect to part B. Good results can be obtained by setting the dimension of the gap g to be approximately the same as the thickness dimension of parts A and B.

The clamp member A is shaped so that it does not fit over the positioning pin A and has two dimensions.

Next, as shown in FIG. 4, bend the part A at the clamp member mouth.
hold down. As a result, the left half of the bent part A as shown in the figure is positioned by the positioning pin a as shown in A// and brought into close contact with the reference plane 1, but the right half has the aforementioned gap g (Fig. 3). It is not completely restrained, so no excessive force is applied.

After that, as shown in Fig. 5, part B is
and the bent part A are pressed down and clamped (more specifically, the right half of the bent part A in the figure is pressed down and clamped onto the reference plane 1 via the part B). As a result, part B
is correctly positioned by positioning pins b and c, and the right half of bent part A is also positioned by positioning pin b. However, in this state, there is a possibility that a slight unreasonable stress may be applied to the bent part A, so lift the clamp member mouth slightly as shown by arrow U to release the distortion in the bent part A, and then press the clamp member again as shown by the arrow. Push down as shown and re-clamp the left half of bent part A as shown in A'. As a result, the bent part A is also correctly positioned and clamped without being subjected to excessive force.

〔Effect of the invention〕

As detailed above, according to the clamping method of the present invention,
There is no need to use special mechanical equipment, and there is no risk of damaging the thin plate-shaped bent parts and thin plate-shaped parts that are the work target parts.
This provides an excellent practical effect in that these parts can be accurately positioned and clamped.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a method of positioning and clamping a thin plate-shaped component according to the prior art, and FIG. 2 is an explanatory diagram of a technical problem when positioning and clamping a thin plate-shaped bent component using the above-mentioned conventional technique. FIGS. 3 to 5 are operation explanatory diagrams depicting one embodiment of the clamping method of the present invention in the order of steps. 1... Reference plane, 2, 3... Pivot shaft of the clamp member. 42 openings...clamp member, a, b, c...positioning pin, A, B...thin plate-shaped parts, A/...thin plate-shaped bent parts, A-B...bending of bent parts Part, A, locating pin hole.

Claims (1)

[Claims] A thin plate-shaped bending part A having spring elasticity is positioned by two positioning pins a and b planted on a reference plane, and a thin plate-shaped part B is planted on the reference plane. In the method of positioning and clamping with the positioning pins b and c of the book, (i) the positioning pin b is inserted into the positioning hole provided in the bent part A;
(ii) Lay part B on top of bent part A and fit positioning pins b and c into the positioning holes provided in part B; (iii) Cover positioning pins b and c. (iv) Clamp the bent part A by pressing it with a clamp member B having a shape that covers the positioning pin a. (v) Clamp the part B and bent part A in an overlapping state using the clamp member A, and (vi) once release the pressure on the bent part A by the clamp member mouth, and then press it down again. A method for clamping thin plate-shaped bent parts, which is characterized by re-clamping.