JP2001076442A - Manufacture of die casting actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of forging defects as much as possible when an arm is multilayered by forging a recessed joining part between head suspension attaching parts so as to join each head suspension attaching part with another. SOLUTION: A die casting actuator 1 is provided with a gate 3 formed to be long in a longitudinal direction, a carriage 9 extended to the gate 3, plural arms 5 extended to the carriage 9, a head suspension attaching part 6 extended to the tip part of each arm 5, a joining part 2 for joining each head suspension attaching part 6 with another, and an overflow 4 provided in each joining part 2, The joining part 2 is recessed, and roughly U-shaped in section. Thus, the generation of forging defects when the arm 5 is multilayered is reduced, and the cutting work of the head suspension attaching part 6 is carried out highly accurately within a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a die-casting actuator provided in a hard disk drive, and more particularly to a method for reducing casting defects that occur when the arms of a die-casting actuator are multilayered.

[0002]

2. Description of the Related Art FIG. 3 (a) is a view showing a conventional die-casting actuator before cutting, and FIG.
It is sectional drawing of the thick part of the die casting actuator. As shown in FIG. 3, the conventional die casting actuator 11 before cutting includes a gate (gate) 13, a carriage 19 extending from the gate 13, and a carriage 1.
9, a plurality of arms 15, a thick portion 20 extending at the tip of each arm 15, and a gate 1 of the thick portion 20.
3 and an overflow (gas release) 14 formed at a position substantially at the same height.

In such a conventional die-casting actuator 11 before cutting, a molten metal is poured into a mold from a gate 13, and the molten metal flows between the arms 15, passes through the thick portion 20, and passes through an overflow 14 until a predetermined time passes. , And then cast, solidified, and then removed from the mold.

Then, the gate 13 and the overflow 14 are removed, and the head suspension mounting hole 17 is formed in the thick portion 20 of the die casting actuator 11 before cutting.
After that, the thick portion 20 is processed with a metal saw or the like so that only the extended portion of each arm 15 remains, so that the head suspension can be attached.

[0005]

In general, the hard disk drive has a standardized size, so that the storage capacity is increased by increasing the number of disks. However, if the number of disks is increased, the arm of the die-casting actuator is increased. Is multi-layered, each arm becomes thin.

However, in the conventional method of manufacturing a die-casting actuator as described above, the thick portion is relatively large as compared with the head suspension mounting portion of the die-casting actuator. The turbulence generated during the change causes impurities such as oxides and slag to be entrained, and H ₂ , N ₂ , CO, CO ₂ , O ₂ , H ₂ O, SO released when the hot water solidifies. _2nd class gas,
There is a problem that hot water solidifies from the exterior and accumulates without escaping so that cavities are easily generated.

[0007] Further, there is a problem that a casting defect that causes a reduction in strength may occur at a boundary between a thick portion and a thin portion, such as a heat crack due to a difference in heat capacity.

Further, in the conventional method of manufacturing a die-casting actuator, one overflow is provided for a plurality of arms, and the distance of the runner is different for each arm, so that the cooling timing becomes poor at the junction of the hot water. In addition, there is a problem that a casting defect that causes a reduction in strength may occur, such as occurrence of a molten metal boundary due to insufficient fusion.

Further, when machining the head suspension mounting hole or the head suspension mounting portion, the thick portion is thick, so that it takes a long time to process, and since the cutting oil does not enter the head suspension mounting portion, There is a problem that the hole diameter of the head suspension mounting hole and the processing accuracy of the head suspension mounting portion are deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can reduce casting defects which occur when the arms are multi-layered. An object of the present invention is to provide a method for manufacturing a die-casting actuator capable of performing cutting in a short time with high accuracy.

[0011]

According to a first aspect of the present invention, there is provided a method of manufacturing a die-casting actuator, comprising: a carriage; a plurality of arms extending from the carriage; and a head extending from the tip of each arm. A method of manufacturing a die-cast actuator in which a suspension mounting portion is integrally formed, wherein a connecting portion having a stolen shape is formed between the head suspension mounting portions so as to connect the head suspension mounting portions. It is intended to be cast.

According to a second aspect of the present invention, there is provided a method of manufacturing a die-casting actuator according to the first aspect, wherein the connecting portion is cast so as to have a substantially U-shape. Things.

According to a third aspect of the present invention, there is provided a method for manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from a tip end of each arm are integrated. A method of manufacturing a die-casting actuator formed by forming a long gate in a longitudinal direction on the carriage and casting the carriage.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from a tip of each arm are integrated. A method for manufacturing a die-casting actuator, wherein an overflow is provided at a connecting portion formed between the head suspension mounting portions so as to connect the head suspension mounting portions, and the casting is performed.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from the tip of each arm are integrated. The method for manufacturing a die-casting actuator formed as described above, wherein each of the head suspension mounting portions is provided with an overflow and is cast.

[0016]

(Embodiment) FIG. 1 (a) is a view showing a die casting actuator before cutting according to an embodiment of the present invention, and FIG. 1 (b) is a connection of the die casting actuator. It is sectional drawing of a part. FIG. 2A is a diagram illustrating a die-cast actuator to which a head suspension is attached after cutting according to the first embodiment of the present invention, and FIG. 2B is a diagram illustrating a head suspension attachment portion of the die-cast actuator. It is sectional drawing.

As shown in FIG. 1A, a die-casting actuator 1 before cutting according to the first embodiment.
Is a gate (gate) 3 formed to be longer in the vertical direction.
A carriage 9 extending to the gate 3; a plurality of arms 5 extending to the carriage 9; a head suspension mounting portion 6 extending to the tip of each arm 5; And an overflow (gas release) 4 provided in each of the connecting portions 2.

Further, as shown in FIG. 1 (b), the connecting portion 2 is stolen and formed to have a substantially U-shaped cross section.

In such a die-casting actuator before cutting, the molten metal is poured into the mold from the gate 3,
It flows between the arms 5, and the head suspension mounting portion 6,
After passing through the joint portion 2 and passing through the overflow 4, a predetermined pressure is applied to cast, solidify, and then take out from the mold.

Then, as shown in FIGS. 2A and 2B, the gate 3 and the overflow 4 are removed, and the head suspension mounting hole 7 is processed.
Cut off the joint 2 with a metal saw, etc., and then
The head suspension 8 is attached to the head suspension attachment 6.

As described above, according to the method for manufacturing the die-casting actuator according to the first embodiment, the connecting portion is formed in a substantially U-shape. The suspension mounting portion can be cut in a short time with high accuracy.

Further, since the gate is formed so as to be longer in the vertical direction and overflow is provided at each joint, casting conditions are stabilized, and casting defects generated when the arms are multi-layered are reduced. be able to.

In the first embodiment, an overflow is provided at the connecting portion, but it may be provided at the head suspension mounting portion.

[0024]

As described above, according to the method for manufacturing a die-casting actuator according to the first aspect of the present invention, the carriage, the plurality of arms extending from the carriage, and the arms extending from the distal end of each arm. And a head suspension mounting portion formed integrally with the head suspension mounting portion, the connecting portion having a stolen shape being formed between the head suspension mounting portions so as to connect the head suspension mounting portions. It is possible to reduce casting defects that occur when the arm is multi-layered, and to cut the head suspension mounting part in a short time and with high precision. effective.

According to a second aspect of the present invention, in the method for manufacturing a die-casting actuator according to the first aspect, the joint is formed so as to have a substantially U-shape. Therefore, it is possible to reduce casting defects generated when the arms are multi-layered, and it is possible to cut the head suspension mounting portion with high accuracy in a short time.

According to a third aspect of the present invention, there is provided a method of manufacturing a die-casting actuator, comprising: a carriage; a plurality of arms extending from the carriage; and a head suspension extending from a tip of each arm. This is a method for manufacturing a die-casting actuator in which a part is integrally formed, and a casting is performed by providing a long gate in the carriage in the longitudinal direction, so that casting defects generated when the arms are multilayered are reduced. There is an effect that can be made.

According to a method of manufacturing a die-casting actuator according to a fourth aspect of the present invention, a carriage, a plurality of arms extending from the carriage, and a head suspension mounting extending from a tip of each arm. A method for manufacturing a die-casting actuator in which a part is integrally formed, wherein an overflow is provided at a connecting part formed between the head suspension mounting parts so as to connect the head suspension mounting parts, and casting is performed. Therefore, there is an effect that it is possible to reduce casting defects generated when the arms are multilayered.

According to the method of manufacturing a die-casting actuator according to claim 5 of the present invention, a carriage, a plurality of arms extending from the carriage, and a head suspension mounting extending from the tip of each arm. The method is a method of manufacturing a die-casting actuator in which the head and the head are integrally formed, and the head suspension mounting part is provided with an overflow so that casting defects caused when the arms are multilayered are reduced. There is an effect that can be made.

[Brief description of the drawings]

FIG. 1 (a) is a view showing a die casting actuator before cutting according to a first embodiment of the present invention. (B) It is sectional drawing of the connection part of the die-casting actuator before cutting by Embodiment 1 of this invention.

FIG. 2 (a) is a view showing a die-casting actuator to which a head suspension is attached after cutting according to the first embodiment of the present invention. FIG. 3B is a cross-sectional view of a head suspension mounting portion of the die-cast actuator to which the head suspension is mounted after the cutting according to the first embodiment of the present invention.

FIG. 3A is a view showing a conventional die casting actuator before cutting. (B) It is sectional drawing of the thick part of the conventional die-casting actuator before cutting.

[Explanation of symbols]

 Reference Signs List 1,11 Die-casting actuator 2 Connecting part 3,13 Gate 4,14 Overflow 5,15 Arm 6 Head suspension mounting part 7,17 Head suspension mounting hole 8 Head suspension 9,19 Carriage 20 Thick part

Claims (5)

[Claims] 1. A method of manufacturing a die-casting actuator, comprising: a carriage; a plurality of arms extending from the carriage; and a head suspension mounting portion extending from a tip of each arm. A method for manufacturing a die-casting actuator, characterized in that casting is performed such that a connection portion having a stolen shape is formed between the head suspension mounting portions so as to connect the head suspension mounting portions. 2. The method for manufacturing a die-casting actuator according to claim 1, wherein the joining portion is cast so as to form a substantially U-shape. 3. A method for manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from a tip of each arm are integrally formed. A method for manufacturing a die-casting actuator, comprising providing a long gate in the longitudinal direction on the carriage and casting. 4. A method of manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from a tip of each arm are integrally formed. A method of manufacturing a die-casting actuator, characterized in that an overflow is provided at a connecting portion formed between the head suspension mounting portions so as to connect the head suspension mounting portions, and casting is performed. 5. A method for manufacturing a die-casting actuator, wherein a carriage, a plurality of arms extending from the carriage, and a head suspension mounting portion extending from a tip end of each arm are integrally formed. A method for manufacturing a die-casting actuator, wherein an overflow is provided in each of the head suspension mounting portions and casting is performed.