JP3416870B2 - Continuous grinding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a grinding device used for grinding (including "polishing". The same applies hereinafter) to an object to be ground such as a ferrite core.

[0002]

2. Description of the Related Art Conventionally, as a grinding device for automatically grinding a workpiece, a movable table for placing the object to be reciprocated at a constant cycle and a table surface of the movable table are opposed to each other from above. A rotating grindstone and a grinding wheel are arranged on the side from the conveyor for carrying in the object to the conveyor for carrying out, and a chuck for holding the object to be ground is arranged between the moving table and each conveyor and moved from the conveyor for carrying in the object to be ground. It has been proposed that the transfer to the table and the transfer from the moving table to the carry-out conveyor are performed by a chuck for holding an object to be ground (JP-A-3-60959).

The grinding device can automatically feed the object to be ground. However, when the chuck for holding the object to be ground is in the process of moving, the object to be ground cannot be loaded or unloaded. For this reason, the end of the carry-in conveyor and the start of the carry-out conveyor are provided with a separation chuck for the object to be ground, an optical sensor for detecting the presence or absence of the object to be ground, and a mechanism for separating the object to be ground by a stopper that locks the object to be ground. Therefore, the object to be ground cannot be continuously ground because the transfer of the object to be ground is a batch process.

In addition to the grinding device, a transfer pallet is provided on the upper surface side of the belt conveyor at regular intervals, and a rotary grindstone is arranged above the moving path of the transfer pallet to remove the object to be ground placed on the transfer pallet. A grinding method has also been proposed (Japanese Patent Laid-Open No. 59-107826). In this grinding apparatus, a supply cassette and a take-out cassette are arranged at the start end and the end of the belt conveyor in order to move the object to be transferred into and out of the transfer pallet. Grinding is batch processing.

In addition to the above, in any of the above-mentioned grinding devices, the rotary grindstone is arranged above the moving table or the transfer pallet, and therefore only one surface of the object to be ground is ground by one feeding. It cannot be processed. Further, since it is necessary to adsorb the object to be ground on the moving table or the transfer pallet by an electromagnetic chuck or the like, the entire apparatus becomes mechanically complicated and large.

[0006]

SUMMARY OF THE INVENTION The present invention is capable of increasing the production quantity by continuously processing with a simple facility from the process of receiving the object to be ground from the previous process to the grinding process and sending it to the next process. It is an object of the present invention to provide a continuous grinding device that can perform highly accurate grinding processing.

It is another object of the present invention to provide a continuous grinding machine which can efficiently grind an object to be ground.

[0008]

In a continuous grinding apparatus according to a first aspect of the present invention, a side portion of an object to be ground is protruded laterally so that the object to be ground is located between opposing belt strips. The rotary belt is equipped with upper and lower rotating belts that are sandwiched and transported, and a rotating grindstone that is arranged on one side with the grindstone surface facing the rotating belt and a flat reference surface that faces the grindstone surface of the rotating grindstone. With a grinding reference plate disposed opposite to each other, the rotating grindstone and the grinding reference plate are paired, the rotating grindstone and the grinding reference plate are alternately positioned in each set order, and at least two sets are ground. It is configured by sequentially mounting the rotating belt in the transfer direction.

In the continuous grinding apparatus according to the second aspect of the present invention, the set of the rotating grindstone and the grinding reference disk arranged on the loading side of the object to be ground is used for pre-grinding, and the rotating grindstone and the grinding reference board following it are used. Is provided for the main grinding in sequence in the transfer direction of the object to be ground by the rotating belt.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to the attached drawings, in the illustrated embodiment, a ferrite core or the like is used as an object to be ground (hereinafter referred to as a "work"), and a double-sided grinding process is performed on the work. The continuous grinding device to perform is shown.

In the continuous grinding apparatus, as shown in FIG. 1, upper and lower rotating belts 1 and 2 (however, the upper rotating belt 1 is a single point for sandwiching a work C between opposed belts and transferring it horizontally. (Partially shown by a chain line), and the rotary belts 1 and 2 are opposed to each other with the rotating grindstones 3a to 3c and the grinding reference plates 4a to 4c as a set, and three sets are formed by the rotary belts 1 and 2. It is configured by sequentially providing the work C in the transfer direction. Each set 3a, 4a, 3b, 4b, 3c, 4c of the rotary grindstone and the grinding reference disk is arranged alternately in each set order so as to sequentially grind the work C one by one.

In this continuous grinding apparatus, as shown in FIG. 1, a work C carry-in lane 5 and a carry-out lane 6 are provided at the start and end sides of the rotary belts 1 and 2, and the work C is carried in from the preceding process. In this configuration, the rotating belts 1 and 2 can be configured to feed the rotating belts 1 and 2 one after another to perform grinding and then to send them to the carry-out lane 6. Each of the mechanical parts of the continuous grinding machine has stand frames 8a, 8b, 9a mounted and fixed on the plate surface of the base 7 as shown in FIG.
By being supported by 9b, they are mounted on the base 7 respectively.

The rotating belts 1 and 2 are driven and driven by pulleys 1a, 1b and 2 as shown in FIG. 2 (however, the rotating grindstone and the grinding reference plate are shown as sets 3a and 4a. The same applies hereinafter).
It is composed of an endless belt that is stretched around a and 2b. The rotating belts 1 and 2 are based on a belt strip made of a material capable of withstanding normal tension, and a material having elasticity such as urethane is coated on the belt surface on the side in contact with the work W, so that the thickness of the work W, etc. It is formed so as to be able to absorb the variation of.

The rotating belts 1 and 2 are upper rotating belts 1.
The belt strips of No. 1 are pressed from above and the belt strips of the lower rotation belt 2 are pressed and supported from below by the tension rollers 10 and 11, and the work C can be supported by the opposing belt strips with appropriate tension. . Further, as shown in FIG. 3, the work C is provided with a width W ₂ relatively narrower than the width W _{1 of the} work C so that the side portions of the work C are protruded to both sides and supported by being sandwiched.

The rotary grindstones 3a to 3c are arranged on one side with the grindstone surface facing the rotating belts 1 and 2. As the rotating grindstones 3a to 3c, cup-shaped grindstones each having a grindstone surface of a ring shape are provided, and each of the grindstones is rotationally driven at the same speed by a drive motor.

The grinding reference disks 4a to 4c are arranged so as to face each other with the rotating belts 1 and 2 with a flat reference surface facing the grindstone surfaces of the rotary grindstones 3a to 3c. The grinding reference board 4a
4c are provided with disk-shaped rotary discs that rotate in synchronization with the respective rotary whetstones 3a to 3c by a drive motor so that the workpiece C being ground by the rotary whetstones 3a to 3c can be stably received on the reference surface.

The rotary whetstones 3a to 3c are shown in FIG. 4 (however, the rotary whetstone and the grinding reference plate are shown as sets 3a and 4a), and the rotation center line a is the axis center line b of the grinding reference plates 4a to 4c.
On the other hand, it is provided so that a grinding load can be applied to the work C by inclining at a minute opening angle θ. At the same time, the rotary whetstones 3a to 3c and the grinding reference disks 4a to 4c
Is equipped so that the work C can be stably cut by further rotating the rotating belts 1 and 2 in the opposite direction Y opposite to the transfer direction X of the work C (see FIG. 1) to further increase the grinding load.

A rotary grindstone 3a for pre-grinding and a grinding reference plate 4a are arranged on the carry-in side of the work C. For this pre-grinding, when the work C is a ferrite core or the like, particles generated at the time of molding or powder coming out of the placing tray at the time of firing may adhere, and the adhered matter should be removed to prevent the occurrence of grinding error due to it. It is provided as a surface of a work surface that serves as a cutting reference such as removal. Subsequent to the pre-grinding groups 3a and 4a, a group is formed in which grinding is performed on the basis of the chamfered surface of the work C by the rotary grindstone 3a.
A set 3b for main grinding, which grinds the work C one by one,
4b, 3c, 4c are sequentially arranged.

The rotating grindstones 3a to 3c and the grinding reference plate 4
As shown in FIG. 2, an under guide 12 for slidably supporting the belt strip of the lower turning belt 2 from below and an idle rotation for pushing the belt strip of the upper turning belt 1 from above are provided in the area facing the a to 4c. The work C to be ground by the elastic pressing mechanism of the rotating belt composed of the rollers 13a and 13b is attached to the rotating belts 1 and 2.
In order to prevent the workpiece C from being damaged while being stably sandwiched and transferred, each set is provided.

The under guide 12 is provided on the plate surface of the base 7 with a sliding contact surface with the lower rotating belt 2 curved upward in an arc shape. Idling rollers 13a, 1
3b is each rotary grindstone 3a-3c and grinding reference boards 4a-4c.
It is supported by stand frames 14a and 14b arranged on the plate surface of the base 7 near the start end and the end of the facing area.

The idle rollers 13a and 13b are mounted on the stand frames 14a and 14b by bearings on the bracket arms 15a and 15b. The bracket arms 15a and 15b are the stand frame 14
A connecting plate 17 which is pivotally attached to the bases a and 14b and which is provided with tension springs 16a and 16b on the side portions of the stand frames 14a and 14b and whose vertical position can be adjusted.
It is swingably supported by tension springs 16a and 16b by being bridged between a and 17b.

As shown in FIG. 2, guide plates 18a and 18b, which are in sliding contact with the side surface of the work C, are provided on the side of the transfer path of the work C by the rotating belts 1 and 2, respectively.
c, the grinding reference disks 4a to 4c are provided so as to extend flush with the grinding wheel surface and the reference surface in the front-rear direction. The guide plates 18a and 18b assist the transfer of the work C by the rotating belts 1 and 2, and are arranged on both sides (one side is not shown) via the transfer path of the work C by the rotating belts 1 and 2. Has been done.

Although the above-described embodiment has been described based on the dry grinding apparatus, in particular, the grinding fluid supply mechanism for the work C is provided in the wet grinding apparatus (not shown). Moreover, although it explained based on the case where three sets of rotary grindstones 3a-3c and grinding reference boards 4a-4c were arranged, four sets or more and a plurality of sets are sequentially arranged and provided.

In the continuous grinding machine thus constructed, the work C is successively fed from the carry-in lane 5 between the belt stripes of the rotary belts 1 and 2. The rotating belts 1 and 2 are
Since the work C is driven at the same speed as the feeding speed, the work C can be transferred by aligning and sequentially receiving the work C without a front-back interval. Therefore, not only the efficiency of transferring the work C can be improved, but also the production quantity of the cutting process performed with the transfer of the work C can be increased.

Since the work C is received by sandwiching and holding the work C between the belt surfaces formed of the elastic materials of the rotating belts 1 and 2, the work C has some variations in thickness. Can be absorbed by the belt surfaces of the rotating belts 1 and 2, and the work C can be stably held. Further, the rotation grindstones 3a to 3c and the grinding reference plates 4a to 4c are transferred in the arrangement direction as the rotating belts 1 and 2 travel. Finally, the belt strips of the rotary belts 1 and 2 travel in opposite directions, and the space between the rotary belts 1 and 2 widens on the terminal side, so that the work C can be sent to the carry-out lane 6 one after another.

Therefore, in the case where the work C is a ferrite core, the core manufacturing process from the previous process including molding and firing of the core to the grinding process, the next process of washing and drying the core, and further packing the magazine. It can be made continuous and processed in series.

The grinding of the work C is performed while the work C is sandwiched and held between the belt stripes of the rotary belts 1 and 2. Further, it is applied to the side portion of the work C protruding laterally from the belt stripes of the rotating belts 1 and 2. When the work C reaches the pre-grinding groups 3a and 4a, the rotary grindstone 3a performs chamfering on one side of the work C as a cutting reference. Next, one side portion is ground based on the side portion of the work on which the set 3b, 4b for main grinding, which is different from the set 3a, 4a for pre-grinding, is set as a reference, and further main grinding is continued. In the sets 3c and 4c for use, the other side portion is ground based on the side portion of the work C previously ground.

The grinding of the work C is performed by the grinding wheel surfaces of the rotating grindstones 3a to 3c which face each other while the work C is regulated from one side portion by the flat reference surfaces of the grinding reference disks 4a to 4c. It can be applied with high accuracy to the work C that is sandwiched and transferred by 1 and 2 stably. In particular, the precision can be further improved when performing the pre-grinding process, and the double-sided process can be continuously performed during the series of grinding processes.

Further, the rotation axis center line a of the rotary grindstones 3a to 3c is inclined at a minute opening angle θ, and the rotary grindstones 3a to 3c and the grinding reference disks 4a to 4c are rotated by the rotating belts 1 and 2. Opposite direction Y opposite to C transfer direction X
Since it is driven to rotate, the grinding load acts on the work C to surely bring the grindstone surfaces of the rotary grindstones 3a to 3c into contact with each other, so that grinding can be efficiently and stably performed.

Each rotating grindstone 3a-3c and grinding reference plate 4a-
In the area facing 4c, the belt strip of the lower rotation belt 2 for sandwiching and transporting the work C is slidably supported from the lower side by the upward arc-shaped curved surface of the under guide 12 and rises upward. The belt strip of the rotating belt 1 is pressed from above by the idle rollers 13a and 13b while sandwiching the work C.

Therefore, within the interval between the idle rollers 13a and 13b, the work C is more strongly pushed and held by the elastic deformation of the belt stripes of the rotating belts 1 and 2, so that the work C is displaced due to the grinding process. Can be prevented. In addition, the idle roller 13
Since a and 13b are swingably mounted, when a surplus load acts on the work C, it can be released conversely, so the influence on the work C before and after the grinding process can be suppressed, and each work can be suppressed. It is possible to prevent C from being damaged.

In general, the grinding speed described above is 600 mm / min, whereas in the present invention, the grinding speed is 1 mm.
It is more than doubled at 4000 mm / min. In the present invention, the production quantity can be increased by about three times compared with the conventional one. Further, the variation in the grinding accuracy is as small as 20 μm in the related art, but can be suppressed to 10 μm or less and 1/2 or less in the present invention.

[0033]

As described above, according to the continuous grinding apparatus of the first aspect of the present invention, the side of the work to be ground is protruded laterally so that the work to be machined faces the belt strip. It is equipped with upper and lower rotating belts that are sandwiched and transferred between them, and a rotating grindstone that is placed on one side with the grindstone surface facing the rotating belt side and a flat reference surface that faces the grindstone surface of the rotating grindstone. By equipping the grinding reference plate with the moving belt facing each other, the objects to be ground that are carried in one after another from the previous process are received, the grinding process is performed between the rotating grindstone and the grinding reference plate, and then carried out to the next process. Until then, it can be processed continuously by the rotating belt without gaps in the front and back, and the objects to be ground can be aligned and received sequentially.

Therefore, not only the efficiency of transferring the object to be ground can be improved, but also the number of processing to be performed in accordance with the transfer of the object to be ground can be increased. In addition, since the grinding of the object to be ground is performed from one side of the object to be ground by the grindstone surface of the rotating grindstone that is opposed to it while being regulated by the flat reference surface of the grinding reference plate, the object to be stably sandwiched by the rotating belt and transferred. It can be applied to grinding objects with high precision.

Further, a rotary grindstone and a grinding reference disk, which are arranged to face each other with a rotary belt interposed therebetween, are combined, and the rotary grindstone and the grinding reference disk are alternately arranged in the order of each set, and at least two sets are ground. By sequentially providing the rotating belt in the transfer direction, it is possible to continuously perform double-sided processing of the object to be ground with high accuracy.

According to the continuous grinding device of the second aspect of the present invention, the set of the rotary grindstone and the grinding reference plate arranged on the loading side of the object to be ground is used for pre-grinding, and the rotary grindstone and the grinding that follow are set. By equipping the set with the reference board for main grinding in sequence in the direction of movement of the object to be ground by the rotating belt, it is possible to perform not only continuous double-sided processing of the ground object but also extremely high-precision double-sided processing. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a continuous grinding apparatus according to the present invention.

FIG. 2 is a schematic side view showing a peripheral related mechanism centering on a pair of rotary grindstones and a grinding reference disk in the continuous grinding apparatus.

FIG. 3 is an explanatory view showing a width relationship between a belt strip of a rotating belt and a work in the continuous grinding apparatus.

FIG. 4 is an explanatory view showing an opening angle of a rotary grindstone in the continuous grinding apparatus.

[Explanation of symbols]

C Grinding object 1 Upper rotation belt 2 Lower rotation belt 3a-3c rotary whetstone 4a-4c Grinding reference plate 3a, 4a set for pre-grinding 3b, 4b, 3c, 4c Main grinding set 12 Under Guide 13a, 13b idle rollers

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-160451 (JP, A) JP-A-4-135152 (JP, A) Actually opened 56-94257 (JP, U) Actually opened 54- 43690 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B24B ^7/ 00-7/30 B24B 41/06

Claims (2)

(57) [Claims] 1. An upper and lower rotating belt for laterally protruding an object to be ground and sandwiching and transferring the object to be ground between opposed belts, and rotating a grindstone surface. It is equipped with a rotary grindstone arranged on one side toward the belt side, and a grinding reference plate which is arranged opposite to the rotary belt with a flat reference surface facing the grindstone surface of the rotary grindstone. Continuous grinding, characterized in that a standard disc is paired, a rotary grindstone and a grinding standard disc are alternately positioned in the order of each set, and at least two sets are sequentially provided in the transfer direction of the rotating belt of the workpiece. apparatus. 2. The object to be ground is set such that a set of a rotary grindstone and a grinding reference plate disposed on the carry-in side of the object to be ground is for pre-grinding, and a subsequent set of the rotary grindstone and grinding reference plate is for main grinding. The continuous grinding device according to claim 1, wherein the continuous grinding device is provided in sequence in a transfer direction by a rotating belt.