JP2670888B2 - Grinding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a grinding apparatus suitable for grinding a flat cylindrical object to be ground such as a ferrite core.

(Summary of the Invention) The present invention is a grinding device for grinding a flat cylindrical object to be ground such as a ferrite core, in which a flat end surface of the object to be ground is supported by using a rotary carrier that rotates in a horizontal plane. The object to be ground is carried and the grinding process is carried out to improve the stable carrying of the object to be ground and the grinding process.

(Prior Art) In a conventional grinding device, a cylindrical object to be ground is conveyed in a standing state (a state in which a circumferential surface is supported by a conveying means).
In addition, the work to be ground has been processed by a single-shot method in which each piece is processed.

(Problems to be solved by the invention) By the way, in the case of a conventional grinding machine, when a cylindrical object to be ground is conveyed, it is carried out while supporting the circumferential surface of the object to be ground. There is a risk of falling, and transportation is very unstable. Further, since the processing is performed by a single-shot method, there is a problem that the processing capacity is small and mass production cannot be easily performed.

The present invention has been made in view of the above points, and an object thereof is to provide a grinding apparatus that is capable of stably conveying an object to be ground and improving its processing capability.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has a plurality of workpiece mounting surfaces partitioned by a conveying claw, and the workpiece mounting surface has a cylindrical shape. A bottom piece made of a cemented carbide material, which is in contact with the flat end surface of the object to be ground, is provided so as to slightly project, and the flat surface of the cylindrical object to be ground is supported by the surface to be ground and transferred. A configuration in which a rotary carrier is rotated in a horizontal plane, a rotating force is applied to a cylindrical object to be ground at a grinding processing position by an adjusting wheel, and the cylindrical object to be ground at the grinding processing position is ground with a rotary grindstone. I am trying.

(Operation) The grinding apparatus of the present invention has a configuration in which a rotary carrier that conveys an object to be ground is horizontally arranged and rotated in a horizontal plane, and a flat end surface of the object to be ground is placed on the object mounting surface of the rotary carrier. Since the object to be ground is conveyed while it is placed, unlike the conventional placement, there is no risk of the object to be ground falling over during transportation, and the object to be ground can be stably conveyed and stable during grinding. It becomes possible to perform grinding. In addition, since the bottom piece of cemented carbide that is in contact with the flat end surface of the cylindrical work piece is arranged on the surface of the rotary carrier on which the work piece is to be ground is slightly protruding, wear resistance is improved. In addition, it is possible to improve the rotation of the cylindrical object to be ground and smoothly execute the grinding operation at the grinding position. Also,
By the rotary system that rotates the rotary carrier to convey and grind the object to be ground, supply of the object to be ground,
Since the operations of carrying, grinding, and taking out are consistently and continuously performed, the processing capability of the apparatus is improved and the productivity can be improved.

(Example) Hereinafter, the Example of the grinding device which concerns on this invention is described according to drawing.

1 to 3, reference numeral 11 denotes a main body frame, and a hopper 12 and a tray 13 are supported on the main body frame. A ball feeder 14 and a linear feeder 1 connected to the ball feeder 14 are mounted on the body frame. The hopper 12 temporarily stores the cylindrical work 6 to be ground, which is shown by the phantom line in FIG. 7, and supplies it to the ball feeder 14 through the tray 13. The ball feeder 14 supplies the linear feeder 1 with the supplied cylindrical work 6 being aligned while being vibrated so as to be aligned in a predetermined position in the spiral groove. The cylindrical work 6 has a thin (flat) cylindrical shape formed of ferrite or the like, and is aligned with the flat end faces in contact with each other when being conveyed, so that the linear feeder 1 is placed on the linear feeder 1. Due to the action of vibration, it moves forward in the direction of arrow G.

As shown in FIGS. 4 to 6, the rotary carrier 2 is arranged horizontally (horizontally) in order to stably convey and process the thin cylindrical work piece 6 to be ground. The rotary carrier 2 is in the form of a disk having a raised annular upper end surface, and the annular upper end surface is designed on a plurality of object-to-be-grounded surfaces F by the transfer claws 5. Then, as shown in FIG. 2, the rotary carrier 2 is rotated in a horizontal plane in response to the rotational driving force of the carrier motor 21 attached to the lower portion of the main body frame 11, and each of the workpiece mounting surfaces F is ground. Accept item one by one. In this embodiment, the conveying claw 5 divides the section into 30 to 33 sections (depending on the product type, the number of divisions is more than this). As the rotary carrier 2 rotates (for example, at 2 rpm / 30 divisions), the workpiece 6 is conveyed to the grinding position P by the conveying claw 5.

Further, as shown in FIGS. 5 and 6, a bottom piece 8 made of a super hard material is disposed and fixed on each of the workpiece mounting surfaces F of the rotary carrier 2 for abrasion resistance. The bottom piece 8 has a diameter of 4 mm and is a rotary carrier in order to reduce the contact area between the object 6 to be ground and the surface F on which the object to be ground is placed to improve the rotation of the object 6 when processing the cylindrical object 6. It is arranged so that it projects about 0.1 mm from the smooth upper end surface of No.2.

The adjusting wheel 3 and the rotary grindstone 4 are arranged so as to face each other with the grinding position P interposed therebetween and rotate in a horizontal plane. The adjusting wheel 3 receives the rotational driving force of the adjusting wheel motor 22 attached to the lower part of the main body frame 11 as shown in FIG.
When the cylindrical work piece 6 is ground, it is provided in order to give rotation to the work piece from the initial stage of processing. Therefore, as shown in FIG. 4, the rotary carrier is brought into contact with the work piece at the grinding position P. It is supported above 2 in an eccentric position with respect thereto. A diamond of # 800 is electrodeposited on the outer periphery of the adjusting wheel, and friction is generated between the grinding object 6 and the grinding object 4 to rotate at a predetermined rotation speed. The workpiece 6 is prevented from idling and the roundness of the portion to be processed is improved.

The rotary grindstone 4 receives the rotational driving force of the grindstone motor 23 attached to the lower portion of the main body frame 11 as shown in FIG. 2. For example, the rotary grindstone 4 has a diameter of 125 mm and is made of resin bond # 200. The rotation speed is 8000r.pm. Further, by the spindle unit 15 which pivotally supports the grindstone 4, the height direction and the cutting direction during grinding can be adjusted in units of 0.01 mm, and the size during grinding can be set.

Further, in order to prevent the cylindrical workpiece 6 from floating during grinding, a workpiece pressing portion 16 that can be set in units of 0.01 mm is provided above the grinding position as shown in FIG. The dust generated during grinding is collected by vacuum.

The transfer claw 5 on the rotary carrier 2 has
A groove 24 is provided as shown in FIG. 6 so as not to come into contact with the rotary grindstone 4 when passing through the grinding position P.
It is made of cemented carbide for wear resistance to rotation.

At the product take-out position Q, a take-out chute 25 is arranged along the rotary carrier 2, and a product box 17 for receiving the machined workpiece 6 through the chute 25 is fixed to the body frame 11 to support the box. It is placed on the table 18.

The object to be ground placement surface F on the rotary carrier 2 after the processed object to be ground 6 is taken out is cleaned by the cleaner 19 before reaching the linear feeder 1 to which the unground object to be ground 6 is supplied. To be cleaned by. The cleaner 19 removes dust on the rotary carrier with a nylon brush and collects dust.

Next, the overall operation of the above embodiment will be described. Hopper 12
The cylindrical object to be ground 6 such as ferrite that has fallen more is the saucer
It is supplied to the ball feeder 14 via 13 and is further delivered from the ball feeder 14 to the linear feeder 1 in a fixed posture, that is, in a posture in which the flat end surface of the cylindrical workpiece 6 is in contact with the linear feeder 1. The object 6 to be ground that has reached the tip of the linear feeder 1 sequentially enters the object mounting surface F on the rotary carrier 2 that is slowly and continuously rotating, and is transferred to the bottom piece 8 of the object mounting surface F. The lower end surface of the grinding object 6 is transferred to the grinding processing position P with the lower end surface of the grinding object 6 placed thereon.

Both the adjusting wheel 3 and the rotating grindstone 4 whose circumferential surfaces are opposed to each other at the grinding position P are rotating counterclockwise, but the rotating wheel of the adjusting wheel 3 is about 40 to 50 rpm. Four
Since the number of revolutions is about 8000 rpm and there is a difference in rotational speed between the two, when the cylindrical workpiece 6 reaches between the adjusting wheel 3 and the grindstone 4, the adjusting wheel 3 causes the workpiece 6 to contact the object 6 to be ground. When a rotational force is applied and the grinding stone 4 is contacted at the same time, a predetermined groove 20 is ground as shown in FIG. The groove size of the cylindrical work piece 6 is finally determined because the centers of the grindstone 4, the work piece 6, and the adjusting wheel 3 are aligned as shown in FIGS. 4 and 5. The position between the adjusting wheel 3 and the grindstone 4 is the closest position.

The workpiece 6 that has passed through the grinding position P has a drum shape having flanges at both ends of the small-diameter shaft portion 30 and has reached the product take-out position Q. In this case, the ferrite drum core) is taken out to the product receiving box 17 through the taking-out chute 25 by air only when the rotary carrier 2 is rotating.

In the above-mentioned embodiment, as the object to be ground before processing, a cylindrical shape having no step as shown in phantom line in FIG. 7 is exemplified, but a stepped shape as shown in phantom line in FIG. Even in the case of the object to be ground 6A (the diameter of which changes from the middle of the height), the groove 20A can be ground similarly. In the case of changing the type of object to be ground, the rotary carrier 2
Respond by exchanging etc.

Further, the workability of the object to be ground is determined by the number of rotations of the rotary carrier 2, and the carrier motor 21 uses a speed control motor in order to determine the optimum condition depending on the kind of the object to be ground.

(Effects of the Invention) As described above, according to the grinding apparatus of the present invention, since the rotary carrier that conveys the object to be ground is horizontally arranged and rotated in the horizontal plane, the thin cylindrical shape or the stepped circle is used. The columnar object to be ground can be stably supported by its flat end surface and stably ground during grinding. In addition, since the bottom piece of the cemented carbide material that is in contact with the flat end surface of the cylindrical workpiece is provided on the workpiece mounting surface of the rotary carrier in a slightly protruding manner, wear resistance is improved, In addition, the rotation of the cylindrical object to be ground can be improved and the grinding operation at the grinding position can be smoothly executed. Also,
By the rotary system that rotates the rotary carrier to convey and grind the object to be ground, supply of the object to be ground,
Since the operations of carrying, grinding, and taking out are consistently and continuously performed, the processing capability of the apparatus is improved and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a grinding apparatus according to the present invention,
FIG. 2 is a front view of the same, FIG. 3 is a right side view of the same, FIG. 4 is a plan view of the same main part, FIG. 5 is a side view of the same main part, and FIG. 6 is a rotary without the object to be ground. Cross-sectional side view of the main part of the carrier part,
FIG. 7 is a front sectional view of the columnar ground object after processing, and FIG. 8 is a front sectional view of the stepped columnar ground object after processing. 1 ... Linear feeder, 2 ... Rotary carrier,
3 ... Adjusting wheel, 4 ... Rotating grindstone, 5 ... Conveying claw, 6 ...
Cylindrical object to be ground, 8 ... bottom piece, 11 ... body frame, 12
…… Hopper, 14 …… Ball feeder, 15 …… Spindle unit, 16 …… Grinding object holding part, 17 …… Product receiving box, 20,20A …… Groove, F …… Grinding object mounting surface.

Claims (1)

(57) [Claims] 1. A bottom piece made of cemented carbide, which has a plurality of workpiece-mounting surfaces defined by conveying pawls, and which is in contact with the flat end surface of the cylindrical workpiece to be ground. Is arranged so as to project slightly, and the rotary carrier that supports and transports the flat end surface of the cylindrical object to be ground on the object mounting surface is rotated in the horizontal plane to form a cylindrical column at the grinding processing position. A grinding apparatus, wherein a rotating force is applied to an object to be ground by an adjusting wheel, and the cylindrical object to be ground at the grinding position is ground with a rotary grindstone.