JPS62162457A - Manufacture of magnetic head and device therefor - Google Patents

Abstract

PURPOSE:To achieve high speed polishing of a plurality of magnetic heads at the same time by providing two means for linearly moving and a means for rotating the magnetic heads with respect to an abrasive tape, and a means for mounting the magnetic heads. CONSTITUTION:An abrasive tape 1 (for example of 50cm in width and 100m in length) including abrasive adhered on a polyester sheet is reciprocatingly moved in the up-to-down direction (A) for a predetermined period of time, and plurality of (for example 20) magnetic heads are accurately positioned with respect thereto and attached to a magnetic head drive mechanism, and then moved in the front-to-back direction (B) and for vertical rotation (D) through an angle of 90 deg. so as to polish the surface R. In other words, after the action including A, B, D are repeated predetermined times, the right-to-left movement (C) is added to carry out the action including A, B, C, D, which is repeated predetermined times to polish the surface r. Then, finally finishing is performed by the action including A, B, D, permitting high speed polishing of a plurality of heads at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method of manufacturing a magnetic head and an apparatus thereof.

[Technical background of the invention and its problems] An electric signal is passed through the head coil, and the magnetic flux generated in the coil by this current is formed into a magnetic loop by the head core, and leakage magnetic flux is generated in the head gap provided in this magnetic loop. magnetic recording by setting a magnetic recording surface inside;
Conversely, magnetic heads for reproducing signals recorded on a magnetic recording surface are well known. Precision is required to form the magnetic recording surface of this magnetic head, such as the sliding surface with the magnetic tape.
Normally, magnetic heads were manufactured by polishing each head by sliding it against a polishing tape. However, since it is not suitable for mass production, a method of forming sliding surfaces for a large number of magnetic heads at once was proposed in Japanese Patent Laid-Open No. 164910/1983.

In this method, a head body is first formed by previously forming a surface with a radius of approximately the same radius in the magnetic tape running direction on the sliding surface of the magnetic head using a circular grindstone.

Next, a plurality of magnetic heads are made to protrude from the abrasive tape that is reciprocating up and down, and the abrasive tape is flexed.In this state, the magnetic head is swung left and right orthogonal to the running direction of the abrasive tape, so that the magnetic head slides on the surface of the abrasive tape. An arcuate surface <r) is formed in a direction perpendicular to the magnetic tape running direction, and a surface of approximately radius is formed in the magnetic tape running direction.

When polishing using such a device, there is a limit to the amount of deflection of the polishing tape, as it becomes difficult to swing the magnetic head left and right if the polishing tape has a large amount of deflection. .

When polishing with a small amount of deflection of the polishing tape as described above, it becomes difficult to obtain a sufficient R sliding surface. This phenomenon occurs more significantly as the number of magnetic heads polished simultaneously increases.

Therefore, it is necessary to reduce the number of magnetic heads and swing the magnetic heads at low speed. That is.

There is a limit to mass production, and even greater mass production is desired.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned problems, and provides a method and apparatus for manufacturing a magnetic head that can simultaneously perform high-speed polishing of the sliding surfaces of a large number of magnetic heads and that can be mass-produced.

[Summary of the invention]

A tensioned abrasive tape is moved back and forth in a direction perpendicular to the head gap of the magnetic head.

The magnetic head moves back and forth as if protruding from this reciprocating polishing tape, and the magnetic head swings left and right.

That is, by adding the steps of rotating the magnetic head back and forth and moving it back and forth at appropriate timings, more magnetic heads can be simultaneously polished at a higher speed.

[Embodiments of the invention]

Next, embodiments of the present invention will be described with reference to the drawings.

Abrasive tape: For example, a tape (1) in which an abrasive material is adhered to a polyester sheet with a width of 50m and a length of 100m is supplied.
J-/! / (not shown) and a pick-up reel, and the tape (1) is guided along this path in a straight line from the guide rail (2) (3). This tape (1
) is configured to reciprocate in the vertical direction (2) for a predetermined period of time. The magnetic head (4) to be polished has a head core (5) attached to a holder (6).

During the magnetic recording and reproducing operations of the head core (5), a contact surface (of a force polishing process) to the magnetic tape is used.

That is, the magnetic head 4) transported to the polishing process.

It is housed in the holding portion of this head (4). This holding section is provided in a head drive mechanism to be described later, and performs primary operation control of the magnetic head (4) at a predetermined timing. That is, the mechanism is such that it executes forward and backward movements (2) for controlling contact so as to project onto the stretched polishing tape (1), and rotational movement (0) for rotating the magnetic head in the vertical direction.

Next, the polishing process of the magnetic head will be explained.

The magnetic head (4) is set in the holding portion so that the head gap (8) of the magnetic head (4) coincides with the width direction of the polishing tape (1). rJ by operating the polishing tape (1) and operating the magnetic head (4).
form a surface. For example, use polishing tape (1) for 20
Tension at 9 to 301 cg, ■ Perform nodding at a reciprocating speed of 2 to b, ■ Reciprocate 4 times, ■ Reciprocate 5 times.
Run 120 times at ~6 times/second reciprocating speed. This ■ operation is performed by moving the magnetic head (4) perpendicularly to the polishing tape (1).
Set this and rotate it back and forth within a range of 90 degrees by 45 degrees up and down. This rotation is even 360 degrees.

Even 60 degrees can be selected within an appropriate range depending on the material of the surface to be polished.

After executing this ■■[F] operation, the polishing is performed by switching to the 000 operation.

Immediately, the "r" polishing is performed by the ぢ■■O■ operation.

Tension the abrasive tape (1) at 20 kF 1 to 30 kg, perform the ■ operation I times at a reciprocating speed of 2 to 3 times/second,
■The operation is reciprocating 4 times, ■The operation is reciprocating in a range of 90 degrees at a rotation speed of 5 to 6 times/minute, and the 0 operation is a linear movement at a speed of 3 to 4 times/second in the range of 1 cML. Move back and forth.

Repeat this operation and the above ■■01#J operation an appropriate number of times. When these operations are completed with the ■■■ operation, a good sliding surface for the magnetic tape is obtained.

The magnetic head that performs the above-mentioned ``0'' operation is held and driven by a magnetic head drive mechanism Qυ as shown in FIG. That is, the head holding part @ is provided on the X-Y table @ which is movable in the X-axis direction and the Y-axis direction on the base 4. The X-Y table @ is provided with an X table (C) that moves in the X-axis (O movement direction) on a Y table (2) that moves in the Y-axis (■ movement direction). These tables (2
4) C'9 is driven and controlled by a pulse motor (to) (c). The head holder (c) provided on the X-Y table (2) with such a configuration has a head mounting floor 28 with an orthogonal cross-section.
Zero magnetic heads (4) are each accurately positioned and fixed. Each magnetic head (4) has a head gap (8)
It has a structure in which the abrasive tape (1) is accurately positioned perpendicular to the surface of the tensioned abrasive tape (1) in the upper, lower, right and left directions.

The above-mentioned example of the floor is rotatably supported between the support columns (7), and is rotatably driven (operated) by a motor Cυ. The head drive mechanism configured in this way (
21), the operation of ①OO above is executed by a predetermined program. An example of the combination polishing process of ■■OO is shown in FIG.

FIG. 3(A) shows a current waveform to a motor (not shown) for driving the abrasive tape (1) in the vertical direction like a sewing machine belt. Performs vertical movement using a sine wave with a constant period. Figure 3 (B) shows the ■motor c for performing the operation.
31). Figure 3 (C) shows the current waveform flowing through the motor (two) for performing the 0 operation. Figure 3 (D) shows the current waveform flowing through the motor (A) for performing the ■ operation, and this waveform At the highest value of , the magnetic head (
4) indicates the position where the tip of the core (5) protrudes from the abrasive tape (1), and for a short period when the level drops from this maximum value to a low level, the tip of the abrasive tape (1) and the core (5) Indicates a non-contact state. In this way, a good polishing operation can be performed on a large number of magnetic heads at the same time.

In other words, since the rotating motion (■ motion) of the magnetic head is provided, the relative movement between the magnetic head and the polishing tape can be executed at high speed even when a plurality of magnetic heads are engaged at the same time with the polishing tape being bent. effective.

〔Effect of the invention〕

As explained above, according to the present invention, there is an effect that a large number of magnetic heads can be simultaneously polished at high speed.

[Brief explanation of drawings]

1 is a detailed explanatory diagram of the present invention, FIG. 2 is an explanatory diagram of the magnetic head drive mechanism of FIG. 1, and FIG. 3 is an explanatory diagram of the polishing process side of FIGS. 1 and 2. l...Abrasive tape. 4...Magnetic head. 2.3...Guide roller. ■...Abrasive tape moving direction. ■O◎・・・Magnetic head movement direction. 5... Core. Agent Patent Attorney Noriyuki Ken Yudo Takehana Kikuo (0)Cc) 1st Ward

Claims (5)

[Claims] (1) In a method of forming a magnetic recording surface of a magnetic head by bringing it into sliding contact with a linearly moving abrasive tape that is provided under tension, the abrasive tape and the magnetic a first linear moving means for relatively moving the head; a means for providing a magnetic head on the polishing tape such that a tip of the magnetic head protrudes; and a head gap of the magnetic head having a circular arc in the running direction of the polishing tape. a second means for relatively moving the magnetic head and the polishing tape in a direction perpendicular to the first linear movement direction;
and means for linearly moving a magnetic head. (2) The method for manufacturing a magnetic head according to claim 1, wherein the means for relatively moving the polishing tape and the magnetic head in the first straight line moves the polishing tape back and forth. (3) The magnetic head according to claim 1, wherein the means for rotating the magnetic head so that the head gap draws an arc rotates and reciprocates the magnetic head at a speed lower than the speed of the first linear movement. Head manufacturing method. (4) A method of manufacturing a magnetic head according to claim 1, wherein the means for relatively moving the magnetic head and the polishing tape in a second straight line moves the magnetic head back and forth in a second straight line. (5) a first mechanism that tensions the polishing tape and moves it in a first linear reciprocating manner; and a second mechanism that moves the plurality of magnetic heads in a second linear reciprocating direction in a direction perpendicular to the direction of the linear reciprocating movement.
a third mechanism that rotates the plurality of magnetic heads in the first linear reciprocating direction; a fourth mechanism that moves the plurality of magnetic heads back and forth with respect to the polishing tape; A magnetic head manufacturing apparatus comprising: means for simultaneously operating the first to fourth mechanisms; and means for simultaneously operating the first, third, and fourth mechanisms.