JPS5845660A - Manufacture for magnetic head - Google Patents

Abstract

PURPOSE:To attain excellent laser welding, by constituting a load arm receiving stand and a clamp piece stepwise and deforming a gimbal and adhering it along the shape of the load arm with this step. CONSTITUTION:A clamp piece center 34 projected at the center of a clamp piece 29 depresses the center between a gimbal 9 and a load arm 13, then a very thin gimbal 9 is compulsively displaced in a minute amount along the shape of the load arm 13. In performing laser welding when the gimbal 9 is closely contacted with the shape of the load arm 13, the more or less deformation of the load arm 13 can be compensated for excellent welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a magnetic head, and more particularly, to a method of manufacturing a magnetic head in which a plurality of thin plates are assembled by welding.

FIG. 1(a) is a diagram showing a magnetic head assembly in which two magnetic heads 1 are mounted. This magnetic heldad assembly includes a plurality of magnetic heldads 1, a flexible printed circuit section 5 that transmits data written and read by the magnetic heldad 1, a circuit C6 that amplifies these data, and a flexible printed circuit section 5. It consists of a connector 7 provided at one end of the connector 7, and a holding plate 8- on which each of these parts is mounted. As shown in FIG. 2, the magnetic head assembly constructed in this manner is installed at a position for accessing the magnetic disk 2 in the disk back 100 of a magnetic disk storage device.

As shown in FIG. 2 (bl), the magnetic helad 1 is composed of a gimbal assembly section 4 and a core slider 6 mounted on one end of the assembly section 4 via a VC.

This disk-shaped magnetic head has many different shapes depending on the storage capacity, but the stand 4 that holds the core slider 6 is commonly used in all magnetic heads. Third
5 to 5 show details 11 of the assembly section 4, and FIG. 6 shows the components of the assembly section.
Furthermore, FIG. 5 shows the fourth assembled state as seen from the direction Aa. Referring to FIG. 6, the subassembly section 4 includes a gimbal 9, a load arm 16, and a spacer. 16, the gimbal 9 has a plate thickness of 50 μm, has a spring portion 10, and has a hole 11 and a length 12 extending in the longitudinal direction. The load arm 13 is a complicated press-molded part with a groove 14.
, and has a vane-shaped portion 15. The spacer 16 is a machined product and has a round boss portion 17. These parts are integrally assembled as shown in FIGS. 4 and 5, and are required to have high accuracy of ±20 μm or less despite the complex shape of the thin plate.

Incidentally, these parts are joined by welding at 14 locations shown as welding portions 18 in FIG.

Conventionally, this magnetic head 10 was assembled using a precision jig shown in FIG. This jig is a base 101 on which the load arm 16 warping spacer 16 is positioned.
Second, a gimbal holding frame 37 that holds the precisely positioned gimbal 9 is placed on the gimbal seat 66,
The welded portion 18 (see FIG. 5) is assembled by welding with an electrode for resistance welding. Such conventional techniques have the following problems.

■ Magnetic heads are no exception to the recent trend toward automation of assembly work, and various efforts are being made. However, when automating the assembly section, conventional resistance welding requires frequent electrode corrections, so
There are problems such as generation of welding dust and difficulty in removing it. Therefore, there is an urgent need to develop a non-contact welding method.

■ On the other hand, in the case of non-contact welding (radar welding, etc.), if there is a gap between welded parts at the welding point, only the upper part will be melted and a hole will be created. For this reason, there is a problem in how to make the gimbal, which is an extremely thin plate (50 μm), closely adhere to the mating parts (spacer, load arm) at all the welding points without gaps.

The purpose of the present invention is to eliminate the problems of the prior art, and to solve the problems of the prior art.
/f It is an object of the present invention to provide a method for manufacturing a magnetic head that can perform non-contact welding such as laser welding by pressing the magnetic head with the mating parts (space f, load arm) without any gaps.

In order to achieve this object, the present invention includes a step of positioning the load arm on the leaf spring portion of the gimbal, a step of positioning the spacer f at the 110 end of the gimbal, and a step of positioning the spacer 9" and the gimbal in a hollow shape. 1 by pressing the center of the leaf spring to deform the leaf spring along the shape of the load arm.
:'The process consists of a step of bringing the leaf spring and the load arm into close contact with each other, and a step of laser welding the parts that have come into close contact with each other in each of the above steps.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 6 to 14 are diagrams for explaining a close-clamping jig for precision positioning used in the method of manufacturing a magnetic head according to the present invention.

FIG. 6 is an overall external view showing a close-contact clamp jig according to an embodiment of the present invention.

The clamping jig shown in FIG.
, the spacer pedestal 20 and the load arm pedestal 21 are fixed to the spacer pedestal 20 and the load arm pedestal 21 are fixed to the spacer pedestal 20 and the spacer lateral push piece 220 is placed on the jig base 19.
- The door arm side pushing piece 26 is configured to slide. In addition, after the gimbal 9, spacer 16, and load arm 1606 parts have been assembled and aligned, they can be rotated using the close clamp arm 26 for close clamping or the pivot nabor 27 attached to the jig pace 19 as a fulcrum. There is.

Furthermore, a leaf spring 28 and a clamp piece 29 are housed in the close contact lamp arm 26, and a hole 60 through which the laser beam passes is provided. Further, the clamp piece 29 is supported by the tight clamp arm 26 so as to be able to rotate by an infinitesimal amount.

Incidentally, a shim pin 24 and a positioning pin 25 for positioning the dimple are attached to the jig pace 19 and the spacer pedestal 20.

FIG. 7 shows the main parts of the load arm 13 and the spacer 16 mounted on the clamp jig.
After being aligned, the load arm blade portion 15 is pushed by the load arm lateral push piece 23 to be positioned. By driving the load arm lateral pushing piece 23 in this manner, the load arm 16 is positioned.

A space where the rank will be decided! 1-16 is the spacer 16
After the spacer round boss 17 is installed in the groove of the spacer pedestal 20, it is pressed in the direction of the load arm 13 by the spacer lateral push piece 22, thereby positioning it.

The gimbal 9 is placed on the clamp jig with the load arm 13 warped and the spacer 16 positioned in this way.
As shown in the figure. In the figure, the gimbal 9 has a gimbal tip hole 12.
At the same time, press the spacer holder 20 into the shizumi bin 24.
Positioning is performed using a positioning pin 25 attached to the.

FIG. 9 is a diagram showing a state in which six parts are aligned with the clamp jig shown in FIG. 6 and tightly clamped. In the figure, the leaf spring 28 is attached to the tight clamp arm 26 for the purpose of preventing displacement during gimbal clamping. f: Pushing in, the gimbal 9 is fixed by the spring force of the Sizumi pin up and down spring 61 and the spring force of the leaf spring 28. Gimbal 9 with leaf spring 28
is the fixed layer, and the gimbal spring sounds 1 to 10, which are the connection part between the load arm 13 and the gimbal 9, are pushed in with the clamp piece 29.
After that, the pusher piece 62 is incorporated into the close contact clamp arm 26.
The gimbal portion corresponding to the welded portion with the spacer 16 is pushed in, completing tight clamping of the three parts.

FIG. 10 is a partially enlarged view showing details of the close clamping state of the welding point between the gimbal 9 and the spacer 16. A number of press pieces 62 corresponding to the welding points are independently assembled in the contact ramp arm 26, and the press springs 33 locally pressurize the bath contacts, so that the gimbal 9 and the spacer 16 are brought into close contact.
□ Note that the pusher piece 62 is hollow, and welding is performed by irradiating a laser through this hole.

Figures 11 to 13 show gimbal 9 and load arm 16.
FIG. 11 is a diagram showing and explaining variations in the press-formed shape of the load arm 16 with respect to welding points, and FIG. be. In this case, the blades 15 at both ends remain parallel, and the gimbal 9 and the space f16
Since the welds are in close contact with each other with high precision, good low-the-weld welding can be performed at the welded portion 18.

However, as shown in FIGS. 12 and 13, if the blade portion 15 of the load arm 130 is deformed within the drawing tolerance, the blade portion 15 and the gimbal □゛9 do not come into close contact, resulting in defective welding.

Now, gimbal 9 and load arm 1 in this embodiment
As shown in FIG. 14, the clamp piece center part 34 protruding from the center of the clamp piece 29 presses the center parts of the gimbal 9 and the load arm 16, so that the extremely thin gimbal 9 is brought into close contact with the gimbal 9. This is achieved by forcibly displacing the V-shape slightly following the shape of the load arm 16. and,
Since laser welding is performed with the gimbal 9 in the shape of the load arm 13 and closely attached, even if the load arm 16 is slightly deformed, this can be corrected and good welding can be achieved.

In this example, the load arm holder is mounted on base 21.
A slight step is provided on the clamp piece 29 to force the load arm 130 blade portion 15 to be corrected to -1 side, and the gimbal 9 is corrected by the center W'r step 34 provided on the clamp piece 29. The loader has been devised so that it can be clamped without gaps, following the human shape.

In addition, the clamp J129 has a □/ζ hole 65 corresponding to the welding point 18, and the laser is irradiated from this hole (
It's brushed.

As described above, in the present invention, the load arm and the gimbal are clamped in close contact with each other, and by this step, the gimbal is deformed in accordance with the shape of the load arm and brought into close contact, making it possible to perform good laser welding. .

[Brief explanation of the drawing]

Figure 1 (1) and Figure 1 (1)) are diagrams showing a magnetic head assembled with a magnetic head, Figure 2 is a diagram showing a disk back equipped with a magnetic head, and Figure 6 is a diagram showing a magnetic head. The assembly drawings of the head, FIGS. 4 and 5, are bottom and top views of the magnetic head. FIG. 6 is a diagram showing a close clamping jig which is an embodiment of the method for manufacturing a magnetic head according to the present invention, and FIG.
The load arm warpage space f is applied to the tight clamp jig shown in the figure.
FIG. 8 is a partially enlarged view showing the state in which the gimbal is fully extended to the contact jig shown in FIG. 7. Figure 9 shows the fI/lt clamp jig Niload arm and spacer warp t Shissopal mounted 1 shown in Figure 6.
FIG. 10 and FIG. 14 are diagrams showing a close clamping state according to the present invention, and FIGS. 11 to 13 are diagrams showing clamping states of the load arm and gimbal. FIG. 15 is a diagram illustrating a method of manufacturing a magnetic head according to the prior art. Explanation of symbols 1...Magnetic head, 2...(18 disk, 6...
Core slider, 4... Core slider, 4... Gimbal assembly section, 5... Flexible printed circuit section, 6...
Amplifier (engineering C), 7... Ko, Tokuta, 8... Holding plate, 9... Shisopal, 10... Gimbal spring) rL
11 Lhi 12...Gimbal hole, 1ro ・Load arm, 15...Blade part, 17...Spaner boss II
(, 19... Jig base, 2D... Spacer 9" cradle, 21... Load arm cradle, 22... Spacer side push piece, 23... Load arm side push piece, 24...
・Shizumi pin, 25... Alignment pin, 26... Close clamp arm, 27... Swivel support, 28...
・Plate pie・, 29...Clamp piece, 31...; Spring for Shizumi bottle, 62... Push piece, 66... Push spring,
64...Central part of clamp (protrusion), 65...Laser irradiation/? 1 n Second country total Figure 2? Juice 8 Seno'7 Prisoner 7

Claims (1)

[Claims] A gimbal having a core slider mounted on one end and including a leaf spring portion having elastic properties, and at least six protrusions welded to the leaf spring portion of the gimbal, the gimbal pressing the core slider. and a spacer welded to the other end of the gimbal. a first positioning step for guiding the busy load arm; a positioning step for wc2 for guiding the spacer to the position where it will be welded to the other end of the cymbal; and mounting the gimbal at the welding position with the spacer and the load arm. a third positioning step; a first close contact step of bringing the spacer and gimbal into close contact with each other with a presser piece having a hollow laser irradiation hole by pressing the vicinity of the close contact portion of the spacer and gimbal with a spring; and the loading step. Among the protrusions on the arm, press the center protrusion with a step, and press the leaf spring part of the gimbal into the third part of the load arm.
A second adhesion process in which each protrusion of the load arm and the plate spring part of the gimbal are brought into close contact with each other in the vicinity of the laser irradiation hole by deforming the two protrusions, and the first and second adhesion processes are performed. A method for manufacturing a magnetic head, comprising a welding step of welding the spacer and load arm to the gimbal by irradiating a laser beam through the laser irradiation hole to the closely attached portion of the gimbal, the spacer, and the load arm. .