JPH08309649A - Carrier method and carrier device for workpiece in double head surface grinder - Google Patents

Abstract

PURPOSE: To apply stable double head surface grinding work even in the case of a thin workpiece, by giving tensile force from a peripheral side to a carrier, and holding the workpiece to this carrier fed into between grinding wheels rotated at a high speed. CONSTITUTION: A plurality of tension bolts, insertion screwed to circumferentially equally arranged position of a clamp ring 17, are tightened to give tensile force from a peripheral side to a carrier 13. Magnets 11, 12 are rotated at a high speed in a reverse direction to each other, also to rotate the carrier 13, for instance, by about 1 turn per minute by a carrier driving motor 21. In this condition, when a workpiece 14 is supplied to a holding hole 15 of the carrier 13 in a prescribed position by a supplier device, this workpiece 14 is fed into between the magnets 11, 12 left as held to the holding hole 15 of the carrier 13 to be rotated at a high speed according to rotating the carrier 13, here to perform double head surface grinding the workpiece by the magnets 11, 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier method and a carrier device for a workpiece in a double-sided surface grinder that grinds both sides of the workpiece at high speed.

[0002]

2. Description of the Related Art Conventionally, lapping, polishing and double-sided surface grinding have been used for double-sided finishing of thin parts.

By the way, since the lapping and polishing are constant pressure cutting methods, the processing speed is slow and the efficiency is low. On the other hand, double-sided surface grinding is performed at high speed (about 12
Since it is a forced cutting method with a grindstone of 0 to 2000 rpm), highly efficient processing can be performed.

Therefore, in the case of finishing both sides of a workpiece in a short time, double-sided surface grinding is performed.

In the double-sided surface grinding process, for example, as shown in FIGS. 5 and 6, between the grindstone (1) and the grindstone (2) which rotate in opposite directions at high speed, a holding hole () of the carrier (3) is formed. The workpiece (5) held in 4) is fed by sequentially rotating the carrier (3).

[0006]

By the way, in the double-sided surface grinding process, the carrier (3) for feeding the workpiece (5) between the grindstones (1) and (2) depending on the finished thickness of the workpiece (5).
Of course, the thickness of must be thin. Therefore, when the thin work piece (5) is subjected to double-sided surface grinding, the carrier (3) lacks rigidity and durability, and the work piece (5) is stably held between both grindstones (1) and (2). There was a problem that could not be supplied to. That is, since the carrier (3) is fixed to the rotary drive shaft (6) in the vicinity of the rotation center and is free in the outer peripheral portion, the workpiece (5) is ground during the grinding process of the workpiece (5). Vibration or deformation is generated due to the grinding resistance of (the grinding process has a large grinding resistance, and the carrier (3)
(Because the grinding resistance received by the machine is so large that it cannot be compared with lapping, etc.), the grinding fluid (2)
Side (because the grinding fluid is discharged from the center of the grindstone shaft and scattered to the outer circumference side of the grindstone), distortion and deflection due to poor rigidity makes contact with the grindstone (2) and heat is generated.
Thermal deformation will occur (see FIG. 7). When such thermal deformation occurs, the workpiece (5) slips above and below the carrier (3) during the grinding process, resulting in defective processing, making the carrier (3) unusable and The work piece (5) is damaged, and the work piece (5) itself becomes unusable as a product.

The present invention has been proposed in view of the above problems, and is a carrier method and carrier device for a work piece in a double-sided surface grinding machine that enables stable double-sided surface grinding even for a thin work piece. The purpose is to provide.

[0008]

In order to achieve the above object, the present invention is characterized by adopting the following configuration.

That is, according to the present invention, a double-ended flat surface for grinding both surfaces of a workpiece at a high speed by feeding a workpiece held by a carrier between a grindstone rotating at a high speed while sequentially rotating the carrier. In the grinding machine, the outer peripheral edge of the carrier is rotatably supported, and tensile tension is applied to the carrier from the outer peripheral side so that the carrier is held and is fed between the grindstones rotating at high speed. It was done.

[0010]

With such a structure, since the outer peripheral portion of the carrier is fixed and tensile tension is applied to the carrier from the outer peripheral side, the rigidity of the carrier is improved, and the carrier is processed during grinding. It is possible to prevent vibration and deformation due to the grinding resistance of the object, to press against the grindstone side by the supplied grinding liquid, and to prevent distortion and bending due to poor rigidity.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

1 and 2 are a schematic vertical sectional view and a plan view showing an apparatus for carrying out the present invention, and FIG. 3 is a partially enlarged view of FIG.

In FIGS. 1 and 2, reference numerals (11) and (12) denote grindstones which are arranged on the upper and lower sides of a double-sided surface grinder so as to face each other at high speeds in opposite directions by a drive source (not shown).

Reference numeral (13) is a carrier made of a circular thin plate arranged between the grindstones (11) and (12), and a plurality of holding holes (15) for holding the workpiece (14) are partly provided around the central portion thereof. Are formed at equal intervals on the circumference so as to overlap between the grindstones (11) and (12). The carrier (13) has an outer peripheral edge portion fixed to the tension body (16) via a clamp ring (17) by a plurality of clamp bolts (18) which are equally arranged in the circumferential direction. It is rotatably supported by the support ring (20) by the bearing (19) via the (16).

Reference numeral (21) is a carrier drive motor arranged outside the carrier (13), and a drive gear (23) fixed to the rotary shaft (22) thereof is fixed to the outer peripheral surface of the tension body (16). It is meshed with the driven gear (24), and the rotary shaft (22)
When is driven to rotate, the carrier (13) is driven to rotate via the drive gear (23), the driven gear (24) and the tension body (16).

Reference numeral (25) is a plurality of tension bolts screwed into the clamp ring (17) at equal circumferential positions, and a pressing piece (26) is arranged between the tip of the tension bolt and the carrier (13). .
A recess (27) is formed in the tension body (16) corresponding to the tension bolt (25). The tension bolt (25) is tightened and the carrier (13) is fixed by the pressing piece (26) to the tension body (16). By pushing in the concave portion (27) of the carrier, tensile tension is applied to the carrier (13) from the outer peripheral side.

(28) is a grindstone (11) (1) of the carrier (13)
2) A crescent-shaped guide plate arranged below the holding hole (15) located on the outer side of the space, and is supplied to the holding hole (15) of the carrier (13) at a predetermined position by a supply means (not shown). The workpiece (14) is supported and guided between the grindstones (11) and (12), and the workpiece (14) taken out from between the grindstones (11) and (12) is cut out from the notch (29). It is designed to be dropped by its own weight and discharged.

Next, the double-sided plane processing of the workpiece (14) in the present invention will be described.

First, a plurality of tension bolts (25) screwed into the clamp ring (17) at equidistant positions are tightened to apply tensile tension to the carrier (13) from the outer peripheral side, and then the grindstone (11). The drive means rotates the (12) in opposite directions at a high speed (about 1200 to 2000 rpm), and the carrier drive motor (21) rotates the carrier (13) at about one revolution per minute, for example. In this state, when the workpiece (14) is supplied to the holding hole (15) of the carrier (13) at a predetermined position by the supply device, the workpiece (14) is rotated along with the rotation of the carrier (13). Grindstone (11) (1) (1) that rotates at high speed while being held in the holding hole (15) of (13)
2) It is sent into the space between the two, and after it is subjected to double-sided surface grinding by the grindstones (11) and (12), it is taken out and dropped from the notch (29) of the guide plate (28) by its own weight and discharged.

According to the present invention, the outer peripheral portion of the carrier (13) is fixed to the tension body (16), and tensile tension is applied to the carrier (13) from the outer peripheral side by the tension bolts (25). The rigidity of the carrier (13) is improved and vibration or deformation occurs due to the grinding resistance of the work piece (14) during the grinding process, or it is pressed against the grindstone (12) side by the supplied grinding liquid. It is possible to prevent distortion and deflection due to defects, which prevents the carrier (13) from contacting the grindstone (12) during the grinding process, and the workpiece (14) above and below the carrier (13). There is no need to go down. Therefore, even in double-sided surface grinding of the thin workpiece (14), sufficiently stable grinding can be performed.

In the above embodiment, the outer peripheral edge of the carrier (13) is attached to the tension body (16) and the clamp ring (1).
7) Tension bolts that are clamped between 7) and clamped with a plurality of clamp bolts (18) that are evenly arranged in the circumferential direction, and that are screwed into the clamp ring (17) at equal circumferential positions. By tightening (25) and pressing the carrier (13) into the recess (27) of the tension body (16) with the pressing piece (26), tensile tension is applied to the carrier (13) from the outer peripheral side. However, as shown in FIG. 4, a plurality of clamp bolts are equally arranged in the circumferential direction by sandwiching the outer peripheral edge of the carrier (13) between the clamp ring (30) and the clamp ring (31). The clamp ring (30) and (31) are fastened and fixed by the (32), the clamp ring (30) and (31) are fitted to the shoulder portion (16a) of the tension body (16), and a plurality of tension bolts (33) are equally arranged in the circumferential direction. ) Tighten the tension body (16) with It is also possible to apply tensile tension from the outer peripheral side to the carrier (13) by tightening the tension bolt (33) and pushing down the clamp rings (30) (31).

[0022]

As described above, according to the present invention,
Since the outer peripheral portion of the carrier is fixed and tensile tension is applied to the carrier from the outer peripheral side, the rigidity of the carrier is improved and contact with the grindstone during grinding can be avoided, and the workpiece is the carrier. It is also possible to perform double-sided surface grinding with sufficient stability even on a thin work piece, as it does not go under or above.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a partially enlarged view of FIG. 1 showing another embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a carrier device in a conventional double-sided surface grinder.

FIG. 6 is a vertical sectional view of FIG.

FIG. 7 is a perspective view showing a modified carrier.

[Explanation of symbols]

 11 Grindstone 12 Grindstone 13 Carrier 14 Workpiece 15 Holding hole 16 Tension body 17 Clamp ring 18 Clamp bolt 18 Bearing 21 Carrier drive motor 25 Tension bolt 26 Pressing piece 27 Recess 28 Guide plate 30 Clamp ring 31 Clamp ring 32 Clamp bolt 33 Tension bolt

Claims (2)

[Claims] 1. A double-headed surface grinder that grinds both sides of a workpiece at a high speed by feeding the workpiece held by a carrier between the grindstones rotating at high speed while sequentially rotating the carrier. The outer peripheral edge portion of the carrier is rotatably supported, and tensile tension is applied to the carrier from the outer peripheral side so that the workpiece is held in the carrier and is fed between the grindstones rotating at high speed. A method of carrier of a work piece in a double-sided surface grinder. 2. A double-sided surface grinder that grinds both sides of a workpiece at high speed by feeding the workpiece held by a carrier between the grindstones rotating at high speed while sequentially rotating the carrier. The outer peripheral edge portion of the carrier is fixed to a tension body via a clamp ring, the tension body is rotatably supported by a support member via a bearing, and the tension body is connected to an appropriate rotating means, and A carrier device for a workpiece in a double-sided surface grinder, characterized in that the tension body or the clamp ring is provided with a tension means for applying a tensile tension to the carrier from the outer peripheral side.