JPH0320905Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a composite core slider consisting of a slider, which is a magnetic head main body, and a chip-shaped magnetic head core (hereinafter referred to as the core). This invention relates to a magnetic head assembly device for inserting and assembling a core into a groove-like cavity.

(Prior Art) Conventionally, the assembly of this magnetic head has been carried out manually using tweezers under a microscope. Furthermore, robots having gripping or suction functions are generally used to assemble parts of devices.

(Problems to be Solved by the Invention) The core to be solved by the invention is extremely fine, so it is difficult to grasp it accurately with a robot or a pick-and-place hand. Furthermore, positioning when inserting the core into the groove of the slider can be done by image processing, but this is very expensive.
The purpose of the present invention is to solve the above problems and realize mechanization of assembly work at low cost.

(Means for solving the problem) In order to solve the above problem, the device according to the present invention has an assembly table on which the magnetic head assembly jig is set, and a slider placed on the assembly table, which is sandwiched from the side and rear. A positioning device that performs positioning by positioning the slider body, and an L-shaped reference plate that is mounted on a movable stage that has axes of movement in two directions, front and back and left and right, and that sets the core.
an extrusion device for pushing out the core of the reference plate along the reference surface of the reference plate; a motor attached to one end of a ball screw attached to the moving table; - an encoder attached to the other end of the slider; an optical sensor capable of detecting the edge of the groove of the slider; an origin sensor capable of detecting the origin of the moving table in the Y-axis direction; This magnetic head assembly device is composed of a microcomputer that can take in the outputs of a motor, an optical sensor, and an origin sensor, and a driver that drives the motor using the output from the microcomputer.

(effect) The above mechanism works as follows.

The core is placed on a reference plate, and the moving table on which the reference plate is set is moved by a sensor, ball screw, motor, encoder, microcomputer, and driver, and the core and slider are moved. - Perform relative positioning. Next, from behind the reference plate, the core whose orientation has been corrected is extruded by an extrusion device.
Push out the reference plate while sliding it on the reference surface.
The extruded core is inserted while following the groove surface of the core insertion groove of the slider.

(Embodiment) An embodiment of the magnetic head assembly apparatus according to the present invention will be described below with reference to the drawings. Fig. 1 is an overall view of the present invention, Figs. 2 a to c show the assembly procedure, Figs. 3, a and b show how to position the core in the groove of the slider, and Fig. 4 shows the optical sensor. FIG. 7 is a diagram showing detection points when a plurality of detection points are used.

A slider 1 having a groove 1a is placed on an assembly jig 4 set on an assembly table 3, and is connected to a slider holding plate 5b driven by an actuator 5a and a through hole formed on the side of the jig 4. By pushing the rod 6a of the actuator 6 through the hole 4c, it is moved back, and by pulling the rod 6a, it is moved forward by the leaf spring 4b.The holding piece 4a is held between two directions and positioned. At this time, the side surface of the slider 1 where the groove portion 1a is formed is open.

On the other hand, the core 2 is set on an L-shaped reference plate 8 attached to an X-axis stand 7. An optical sensor 17 capable of detecting the edge of the groove of the slider is attached to the reference plate 8 at a point a certain distance away from the side surface 8b in the Y-axis direction. Further, the X-axis stand 7 has a pushing device 9 for pushing out the core 2 from behind the reference plate 8, and is driven by an actuator 9c via a rack 9a and a pinion 9b.

Further, the X-axis stand 7 is moved along the guide 7a in the X-axis direction by an actuator (not shown), and the distance between the slider 1 and the assembly jig 4 and the reference plate 8 can be freely changed. Further, the Y-axis stand 10 on which the guide 7a is attached is movable along the guide 10a in the Y-axis direction by a ball screw 14 and a motor 15 attached to one end of the ball screw 14. The relative position of the reference plate 8 in the Y-axis direction can be changed. Also, the encoder attached to the other end of the ball screw 14
An origin sensor 20 fixed to the assembly table 3 and an optical sensor 17 attached to the reference plate 8 are connected to a microcomputer 19 which is a control device in order to detect the origin in the Y-axis direction of the printer 16 and the Y-axis table. By driving the motor 15 connected to the driver 18 via the driver 18 connected to the microcomputer 19, the relative position of the slider 1 and the reference plate 8 in the Y-axis direction is determined. Positioning is now possible.

Next, the procedure for assembling the magnetic head using this device will be explained. First, as shown in FIG. 2a, set the jig 4 on the assembly table 3 manually or by pick and place, and with the slider presser plate 5b and presser piece 4a released, slider 4 is set manually or by pick and place. -1 is placed on the slider, and the slider -1 is positioned with respect to the side plate 4d by sandwiching the slider from two directions in this order with the slider presser plate 5b and the presser piece 4a. On the other hand, the core 2 is placed on the lower surface 8a of the reference plate 8 by pick-and-place or the like in the same direction.

Next, as shown in FIGS. 3a and 3b, the reference plate 8 on which the core 2 is mounted is moved from a position between the origin 21 and the turning point 22 in the direction of mark F to the edge of the Y-axis base 10. 10b is moved until it is detected and positioned at the origin 21 in the Y-axis direction. Next, move the reference plate 8 in the opposite direction of the arrow E, and encode the moving distance C from the origin 21 when the optical sensor 17 detects one edge 1b of the groove of the slider 1. This is input into the microcomputer 19 as the rotation angle of the driver 16, and the reference plate 8 is moved as it is and stopped at a turning point 22 which is separated from the origin 21 by a known amount B. Next, the reference plate 8 is moved in the direction of the arrow F, and the moving distance D from the origin 21 when the optical sensor 17 detects the other edge 1c of the groove of the slider 1 is measured by the encoder 16. It is input into the microcomputer 19 as the rotation angle of
The reference plate 8 is moved as it is to the origin 21 and stopped. Then, from the origin 21 slider -1
The apparent distance C, D to both edges 1b, 1c
From this, the apparent width δ of slider 1 can be calculated using the following formula:
Obtained by (1).

δ=D−C (1) Then, the distance G from the origin 21 of the center position 1d of the groove portion 1a of the slider 1 in the Y-axis direction is determined by the following calculation formula (2).

G=δ/2+C...(2) Then, using the following equation (3), the origin 21 is set to align the center of the core on the reference plate with the groove center 1d of the slider 1 in the Y-axis direction. The moving distance H of the reference plate 8 from .

H=G-A...(3) Based on this moving distance H, move from the origin 21 to the reference plate.
8 is moved in the direction of arrow E to position the core 2 relative to the slider 1 in the Y-axis direction. The above calculation is performed by the microcomputer 19. During the above Y-axis positioning operation, slider 1 and reference plate 8
The distance in the X-axis direction is kept constant. When the positioning in the Y-axis direction is completed, the positioning in the X-axis direction is performed.

Next, as shown in FIG. 2b, the core 2 is pushed by the pushing device 9 and inserted into the groove 1a of the slider 1. At this time, the presser piece 4a is moved back so as not to interfere with core insertion.

Finally, as shown in FIG. 2c, the core 2 and slider 1 are simultaneously held down by the holding piece 4a, and the reference plate 8 and slider holding plate 5b are moved back to complete the assembly.

Also, both edges 1 of the groove 1a of the slider 1
By arranging a plurality of optical sensors 17 vertically as shown in FIG. 4a, each optical sensor output state becomes as shown in FIG. 4b. For example, the apparent width of the slider 1 measured by the optical sensor at the upper detection point 1f is equal to the width of the lower chip 1h.
Slider by optical sensor with detection point 1g
It is smaller than the apparent width of 1 by α. Therefore, if you select the one with the smallest apparent width of the slider 1 from among the plurality of optical sensors and perform the above-mentioned positioning based on it, the groove 1 of the slider 1
The effects of chips, etc. on the edges 1b and 1c of a can be eliminated.

Also, both edges 1 of the groove 1a of the slider 1
To detect b, 1c, reference plate 8 is set at origin 2.
If both edges are detected when moving from edge 1 in the direction of arrow E, there will be a time lag between when the optical sensor 17 detects edges 1b and 1c and when the microcomputer 19 reads the current value of the encoder 16. Therefore, as shown in Figure 5a, the actual edges 1b and 1c
The apparent positions of edges 1j and 1k are both shifted by β in the direction of arrow E from the position of . In other words, the actual center position 1d of the groove portion 1a and the apparent center position 1e are shifted by β in the direction of the arrow E. Therefore, if the edges 1b and 1c are detected when the reference plate 8 is moved in opposite directions as shown in FIG. 5b, the actual edges 1b and 1c can be detected.
1c and the apparent edges 1j and 1k are each shifted in different directions, so the actual center position 1d of the groove 1a
The center positions 1e of the apparent grooves match.

(Effects) The device according to the present invention can perform positioning and posture correction on the reference plane without using a gripping mechanism, so even minute workpieces can be inserted relatively easily. Furthermore, since an inexpensive sensor is used in the positioning device, the device as a whole becomes inexpensive.

The above effects make it possible to mechanize the magnetic head assembly work at low cost.

[Brief explanation of drawings]

Figure 1 is an overall view showing one embodiment of the present invention;
The figure shows the procedure for assembling the magnetic head using the device shown in Figure 1, Figures 3a and b show the method of positioning the core relative to the slider, and Figure 4
This figure shows the detection points of the sensors when a plurality of optical sensors are used, and FIGS. 5A and 5B are diagrams for explaining a method of detecting the edge of the groove of the slider using the optical sensors. 1...Magnetic head main body, 2...Magnetic head core,
4... Assembly jig, 8... Reference plate, 9... Extrusion device, 15... Motor, 16... Encoder, 17... Optical sensor, 18... Driver, 1
9...Microcomputer.

Claims (1)

[Scope of utility model registration request] An assembly device for inserting a magnetic head core into a groove on the side of a magnetic head body, comprising: an assembly jig for positioning the magnetic head body; and a reference plate movable in the direction of the groove of the magnetic head body and in a direction perpendicular thereto. an extrusion device that pushes out the magnetic head core placed on the reference plate in the direction of the groove of the magnetic head main body; an optical sensor installed on a side surface of the reference plate on the side of the magnetic head main body; a control device that calculates a distance from a reference position to the center of the groove based on a detection signal from a sensor; a magnetic head assembly device configured to control the position of the magnetic head;