JP2001088031A - Grinding/polishing/cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved grinding/polishing/cleaning device capable of continuously grinding/polishing a plurality of objects and continuously carrying out. SOLUTION: A spiral protruding line 25 is formed on the inner circumferential surface of a substantially horizontal rotation drum 22. When an object to be ground/polished is charged in from a charge inlet 23, it rolls in the drum 22 and fed to an outlet by the action of the line 25. A centrifugal force type grinding/polishing material ejection unit 1 is arranged in the drum 22 and fixedly supported with a support frame 21. The unit 1 receives grinding/polishing material from a supply conveyor 24 and ejects the same onto the rotating object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blasting device for projecting a blasting material onto a material to be polished, and more particularly to a blasting device for projecting a material to be polished while automatically conveying the material to be polished. It has a feature in the mechanism for passing through the area.

[0002]

2. Description of the Related Art There are two types of blasting devices: a nozzle type in which blasting material (shot) is blown by air, and a centrifugal projection type in which blasting material is blown off by a rotor, each having advantages and disadvantages. . The nozzle method is suitable for blasting by manual operation in small-volume production because the spraying direction and blasting point of the blasting material can be easily changed.However, an air compressor must be installed. , Large power consumption (low energy efficiency). The centrifugal projection method consumes little power and is suitable for automatically mass-processing many small parts. The present invention is applied to a centrifugal projection type polisher.

FIGS. 3A and 3B show an example of a known centrifugal projection type polishing apparatus, wherein FIG. 3A is a side view and FIG. 3B is a front view. 1
Is a centrifugal blasting material projector having a structure in which a rotor 1b is rotated by an electric motor 1a, and is fixedly mounted on a frame of the apparatus. This projector projects the abrasive material in the direction of arrow a while diffusing it (the direction of diffusion is perpendicular to the plane of the drawing in the figure).

[0004] A tumbler mechanism is provided as described below in order to position the object to be polished at the position where the above-mentioned blast material is projected (arrow a). That is, the endless belt 3 is wound around the three cylindrical pulleys 2a, 2b, 2c to form a concave curved surface in contact with the virtual cylindrical surface 4 (the details will be described later with reference to FIG. 4). .

[0005] A number of small objects to be polished (not shown in this figure, shown in FIG. 4 described later) are loaded from the door 6 onto the endless belt 3. The large number of small objects to be polished are stirred by the tumbler formed by the endless belt 3, and are ejected from the door 6 after receiving the blasting material (arrow a) while changing the posture in various ways. The abrasive material falls from a large number of through holes (shown in FIG. 4 described later) formed in the endless belt 3, is guided by the screw conveyor 8 by the tray 7, is collected, is raised by the elevator 9, and is repeated. used. 6 'is the door 6
Is an open state, 6 ″ is a door balancer, 10 is a motor for driving the elevator 9. 11 is an abrasive material tank, 12 is a screen, and 13 is an abrasive material supply tank. is there.

FIG. 4 is a perspective view schematically illustrating the tumbler mechanism composed of the endless belt shown in FIG. 3 described above. It is the figure which added the thing. A pair of rotating disks 14a and 14b is provided so as to cover both ends of the concave U-shaped concave surface formed by the endless belt 3, and rotates counterclockwise (counterclockwise) in the figure. Since the endless belt 3 is rotated so as to have the same peripheral speed as the rotating disks 14a and 14b, a large number of workpieces
Are agitated with each other while rolling, and are evenly blasted by the collision of the blasting material. The projection locus of the abrasive material is indicated by the reference symbol a. The endless belt 3 has a large number of through holes 3a. The size of the through hole is set so that the object to be polished 15 does not slip through and fall, and the polished material can pass freely. When the polishing operation proceeds to a desired degree, the endless belt 3 is reversed.
The object to be polished 15 is dropped as shown by the arrow b and carried out. When the material to be polished is carried out, instead of reversing the endless belt 3 as described with reference to FIG. A method of tilting the entire tumbler mechanism including the tumbler mechanism is also known and used.

[0007]

As described above, the conventional blasting apparatus uses a centrifugal blasting material projector (also called an impeller type or a rotor type), so long as the polished material is polished. Input and output are intermittent. Intermittent removal from the blasting device means that substantial operation of the blasting machine is intermittent (while the polished material is being removed, The operation of the material projector must be stopped). In addition, if the removal of the polished work from the blasting device becomes intermittent, the product transportation after the blasting process will be interrupted, requiring large transport equipment and manual labor compared to the number of products. . The present invention has been made in view of the above circumstances, and a large number of small objects to be polished can be continuously polished by a centrifugal blasting material projector, and are continuously carried out. It is an object of the present invention to provide a blasting device capable of performing the above. The reason that the projector for the abrasive material is limited to the centrifugal type is that if a nozzle type projector using compressed air is used, equipment for a large, heavy, and expensive air compressor is required. This is because consumption is large.

[0008]

The basic principle of the present invention created to achieve the above object will be briefly described with reference to FIG. 1 corresponding to the embodiment. In other words, in order to improve the polishing apparatus so that a large number of objects to be polished can be continuously polished and unloaded continuously, a spiral-shaped inner peripheral surface of the rotating drum 22 is spirally formed. Are provided. Input port 23
When inserted from the above, by the action of the spiral ridge 25,
It is sent to the object to be cleaned discharge port 26 while rolling in the drum. A centrifugal abrasive material projector 1 is disposed in the rotating drum 22 and is fixedly supported by a support frame 21. The blasting material projector 1 receives blasting material from the supply conveyor 24 and projects the blasting material toward the rolling object to be polished.

Based on the above-mentioned principle, the construction of the apparatus according to the first aspect of the present invention comprises a cylindrical member and a supporting and driving means for supporting the cylindrical member substantially horizontally and rotating the cylindrical member about its center line. And a means for charging the object to be polished into the cylindrical member, and a centrifugal type, which is positioned in the cylindrical member so as not to hinder the rotation of the cylindrical member. The abrasive material projector is supported. According to the apparatus of the first aspect described above, the object to be polished is constantly fed while rolling in the rotating cylindrical member. The centrifugal blasting material projector supported so as not to hinder the rotation of the cylindrical member projects the blasting material to be conveyed while being rolled as described above. If the above operation is metaphorically expressed from the viewpoint of the object to be polished, it passes through the range of the blasting material projector at a constant speed while rolling (in other words, while changing the posture in various ways). For this reason, the whole body is uniformly hit by the abrasive. In this way, a large number of objects to be polished undergo uniform polishing while being constantly conveyed,
The polished workpiece is continuously carried out at a constant flow rate.

According to a second aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, a spiral ridge is provided on an inner peripheral surface of the cylindrical member. It is characterized in that when the cylindrical member rotates, the object to be polished loaded therein is fed and moved by the spiral ridge. According to the apparatus of the second aspect described above, the object to be polished, which receives the projection of the blasting material while rolling in the cylindrical member, is smoothly fed at a stable speed in the direction of the central axis of the cylinder. Therefore, the degree of lapping of a large number of objects to be polished becomes uniform.

According to a third aspect of the present invention, in addition to the constitutional requirements of the first or second aspect, at least one end of the cylindrical member covers an end face opening of the cylindrical member. An end face plate is disposed, and a scavenged material discharge port is provided on the cylindrical wall of the cylindrical member near the end face plate, and the cylindrical member has a cylindrical wall. It is characterized by having a large number of through holes smaller than the scavenger and larger than the abrasive. Claim 3 described above.
According to the invention device, the flow of the object to be polished conveyed toward one end of the cylindrical member by the action of the spiral ridge or the like is temporarily blocked by the end face plate, and is rotating. When the discharge port formed in the cylindrical member turns downward, it is dropped from the discharge port and carried out. With this configuration, the length of the cylindrical member can be shortened, and the uniformity of the unloading flow rate of the polished product can be reduced with reference to a time longer than the rotation cycle of the cylindrical member. Is not disturbed.

According to a fourth aspect of the present invention, in addition to the constituent elements of the first to third aspects, the supporting and driving means for the cylindrical member is arranged substantially horizontally and substantially parallel. A pair of rollers or a plurality of pairs of rollers, wherein the structure is such that the cylindrical member can be placed on the rollers or unloaded and replaced. According to the apparatus of the fourth aspect described above, the cylindrical member can be quickly and easily replaced. Since the above-mentioned cylindrical member receives the projection of the abrasive material, it is worn relatively quickly. For this reason, the practical value of being easy to replace is enormous. Furthermore, since the shapes, dimensions, and materials of the objects to be polished are various, it is desirable to use a cylindrical member having specifications suitable for each object to be polished. In view of these circumstances, the practical value of quickly and easily exchanging the cylindrical member is very large, and indirectly it is possible to improve the polishing operation efficiency and the polishing quality.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a polishing apparatus according to the present invention. FIG. 1 (A) is a partially cutaway side view schematically showing a particularly important configuration. FIG. 3B is a schematic front view in which a part of the abrasive material projector support frame is provided with parallel oblique lines to facilitate reading, and FIG. Reference numeral 22 denotes a rotary drum as an example of a cylindrical member, and the supporting drive roller 1
6a and 16b. These rollers 1
The rollers 6a and 16b are driven to rotate by a roller drive motor 17a via a roller drive chain 17b. The rollers 16a and 16b support the rotating drum 22 in a substantially horizontal posture and rotate the drum around its cylindrical axis. In order to provide such a function, at least one pair of the column-shaped support driving rollers 16a and 16b is required, and the pair of rollers 16a and 16b are arranged substantially parallel and horizontally. In addition, at least two pairs (generally, a plurality of pairs) are required for a wheel-shaped supporting drive roller. The rotary drum 22 of the present embodiment has a spiral ridge 25 on its inner peripheral surface.
Is provided and has a shape similar to a female screw (compared to a normal female screw, the height of the thread is smaller,
Screw pitch is large). The one or more support driving rollers 16a, 16b are arranged to support the rotating drum 22 horizontally. However, the rotating drum 2
The center of gravity of the object to be polished and moved while being rolled in 2 is not necessarily located at the center of the rotating drum 22, and the inertial force of the object to be polished is applied to the rotating drum 22 while fluctuating. In consideration of such circumstances, the rotary drum 2
2, and a supporting drive roller 16 supporting the same
In some cases, it is better to intentionally bias a and 16b compared to the horizontal. For this reason, when the object to be polished (not shown) is inserted from the object to be polished inlet 23, it rolls due to the action of the spiral ridge (an action similar to screw feed) (FIG. Is moved to the right (arrow c). The flow of the object to be polished in the direction of the arrow c is blocked by the end plate 22a that covers one opening of the rotary drum 22, and falls from the discharge port 26 to be pierced adjacent to the end plate 22a. Then, it is carried out from the object to be cleaned. In FIG. 2B, for convenience of reading, the rotating drum 22
And spots were attached to the end face plate 22a.

Positioned in the rotating drum 22,
An abrasive material projector 1 is arranged. Reference numeral 1a denotes a motor, and 1b denotes a rotor. When only the abrasive material projector 1 is taken up and viewed, the essential is that the abrasive material projector 1 shown in FIG. Similar or similar devices with no difference. The abrasive material projector 1 is fixedly supported by the abrasive material projector support frame 21 so as not to hinder the rotation of the rotary drum 22, that is, not to touch the rotary drum 22. Fixedly supporting the blasting material projector 1 means that it is not necessary to change its position or posture during a regular blasting operation, and it is not necessary to be completely fixed. . That is, even a structure supported so that the position and posture of the abrasive material projector 1 can be adjusted is within the technical scope of the present invention. 2A and 2B show enlarged details in which essential parts of the embodiment shown in FIG. 1 are extracted. FIG. 2A is a side view of an abrasive material projector and its supporting mechanism, and FIG. It is the front view which drawn typically the support frame of the projector without illustration. (See also FIGS. 1 and 2.) Although not shown, the cylindrical wall of the rotary drum 22 is provided with a number of through-holes, and the diameter of the through-holes is much larger than that of the material to be polished. , And set to be much larger than the abrasive material. A large number of objects to be polished (not shown) inserted into the rotating drum 22 from the object to be polished inlet 23.
While being rolled in the circumferential direction by the rotation of the rotary drum 22, it is sent in the direction of the arrow c by the action of the spiral ridge 25, drops from the scrutinized object discharge port 26, and is discharged from the scrutinized object discharge chute 27. It is carried out from. The above-described unloading is performed when the discharge port 26 is turned downward for each rotation of the rotary drum 22. However, when viewed from a time period that is longer than the rotation cycle of the rotary drum, a constant flow rate (number / number) (Unit time).

Since the object to be polished is fed in the direction of arrow c while rolling, the entire surface is uniformly polished. Then, the blasted material that has been blasted and blasted falls from the above-mentioned through-hole (perforated in the cylindrical wall of the rotating drum 22),
It is collected in the direction of arrow d by the lateral feed screw conveyor 18. Reference numeral 19 denotes a drive motor for the above-mentioned lateral feed screw conveyor. The abrasive material collected in the direction of the arrow d is mounted on the elevator 9 by a horizontal screw conveyor. Reference numeral 10 denotes a drive motor for the elevator. In the polishing material collected as described above, the coating powder and abrasion powder of the material to be polished are mixed, and the polishing material that has been crushed into fine particles is also mixed. The sieved material is applied by a conventional technique, is supplied to the blasting material projector 1 by the blasting material supply conveyor 24, is projected by the blasting material projector 1, and is circulated while repeating this operation. The object to be polished loaded in the rotating drum 22 is necessarily rolled by the rotating drum in substantially the same direction as the rotating direction of the rotating drum. In this embodiment, the spiral ridge 25 is provided as described above, and the rolling object to be polished is fed in the direction of arrow c.

As an embodiment different from the above (illustration is omitted), the spiral ridge 25 is omitted, and instead, the rotary drum 22 is slightly inclined, or the abrasive material other than the spiral shape is fed. It is conceivable to provide means (for example, a feed blade which is a simplified version of a turbine blade). Among these various feed means, the spiral ridge has a simple structure.
In addition, the feeding in the direction of arrow c can be performed in a stable state, which is convenient. In addition, the rotary drum 22 of the present embodiment is provided with a single polished material discharge port 26, but a plurality of polished object discharge ports may be provided in the circumferential direction of the drum. Increasing the number of discharge ports of the object to be polished increases the discharge state of the discharged polished product, both in number and amount, and reduces pulsation. Is also close to a completely constant value). Rotary drum 22 in the present embodiment
Are mounted on the supporting drive rollers 16a and 16b and are not in contact with the abrasive material projector supporting frame 21, so that they can be quickly and easily taken out, mounted, and replaced. Can be. In the polishing apparatus of the present embodiment, various rotary drums (not shown) are prepared in advance in addition to the illustrated rotary drum 22. The various types include, for example, a distinction between a small object and a large object, and a distinction between a spherical object and a sharp object. When the article to be cleaned is changed, replace it with a rotating drum (not shown) that matches the article with the new specification. When the rotating drum 22 is worn out with use and cannot withstand use, the same type of rotating drum (supplement parts not shown)
Replace with The reason why such replacement is easily possible is that the rotary drum 22 of the present embodiment is mounted on a pair of support drive rollers 16a and 16b and is rotated by friction transmission.

[0017]

As described above, according to the embodiment of the present invention, the structure and function thereof are clarified. According to the apparatus of the present invention, the object to be polished is rolled in the rotating cylindrical member. Sent regularly. The centrifugal blasting material projector supported so as not to hinder the rotation of the cylindrical member projects the blasting material to be conveyed while being rolled as described above. If the above-mentioned action is metaphorically expressed from the viewpoint of the abrasive material, it passes at a constant speed within the range of the abrasive material projector while rolling (that is, while changing the posture in various ways).
For this reason, the whole body is uniformly hit by the abrasive. In this way, a large number of objects to be polished undergo uniform polishing while being constantly conveyed, and the polished objects are continuously carried out at a constant flow rate.

According to the second aspect of the present invention, the object to be polished, which receives the blasting material while rolling in the cylindrical member, is smoothly fed at a stable speed in the direction of the center axis of the cylinder. So
The degree of lapping of a large number of polished objects becomes uniform. According to the invention of claim 3, the flow of the object to be polished conveyed toward one end of the cylindrical member due to the action of the spiral ridge or the like is temporarily blocked by the end face plate, and the rotation is performed. When the discharge port formed in the cylindrical member is rotating downward, it is dropped from the discharge port and carried out. With this configuration, the length of the cylindrical member can be shortened, and when viewed with reference to a time longer than the rotation cycle of the cylindrical member, the uniformity of the carry-out flow rate of the polished product is reduced. There is no hindrance to sex. According to the device of the fourth aspect, the cylindrical member can be quickly and easily replaced. Since the above-mentioned cylindrical member receives the projection of the abrasive material, it is worn relatively quickly. For this reason, the practical value of easy replacement is enormous. Furthermore, since the shapes, dimensions, and materials of the objects to be polished are various, it is desirable to use a cylindrical member having specifications suitable for each object to be polished. In view of such circumstances, the practical value of quickly and easily exchanging the cylindrical member is very large, and indirectly it is possible to improve the polishing operation efficiency and improve the polishing quality. .

[Brief description of the drawings]

FIG. 1 shows an embodiment of a polishing apparatus according to the present invention,
(A) is a side view schematically drawn by partially cutting out, in which a particularly important component, the abrasive material projector support frame, is provided with parallel diagonal lines to facilitate reading. (B) is a schematic front view partially cut and drawn.

FIGS. 2A and 2B show enlarged details in which the parts of the embodiment shown in FIG. 1 are extracted, wherein FIG. 2A is a side view of an abrasive material projector and a support mechanism, and FIG. It is the front view which drawn typically the support frame of the container omitted.

FIG. 3 shows an example of a known centrifugal projection type polishing apparatus,
(A) is a side view, (B) is a front view.

FIG. 4 is a perspective view schematically illustrating a tumbler mechanism composed of the endless belt shown in FIG. 3 described above, in which the blasting material projector, the trajectory of the blasting material projector, and the material to be polished are illustrated. FIG.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1: abrasive material projector, 1a: motor, 1b: rotor, 2
a, 2b: pulley, 3: endless belt, 3a: through hole, 4: virtual cylindrical surface, 6: door, 6 ': door open position, 6 ": door balancer, 7: tray, 8: screw conveyor, 9 ... Elevator, 10 ... Elevator motor, 11 ... Abrasive material tank, 12 ... Screen, 13 ... Abrasive material replenishment tank, 14a, 14b ... Rotating disk, 15 ... Sweeped object, 16a, 16b ... Support drive roller , 17a: roller drive motor, 17b: roller drive chain, 18:
Horizontal feed screw conveyor, 19 ... Conveyor drive motor, 20 ... Vertical feed screw conveyor, 21 ... Abrasive material projector support frame, 22 ... Rotary drum (1 of cylindrical member)
Example), 23 ... Sweeping object inlet, 24 ... Sweeping material supply conveyor, 25 ... Spiral ridge, 26 ... Sweeping object discharge port, 27
… Shooting object removal chute, a… Projection trajectory of abrasive material, b…
Arrows indicating the discharge of the material to be polished in the conventional tumbler mechanism, c: arrows indicating the moving direction of the polished material in the rotating drum, d: arrows indicating the direction of collecting the polished material by the screw conveyor.

Claims (4)

[Claims] A cylindrical member, and a supporting member for supporting the cylindrical member substantially horizontally and rotating the cylindrical member around a center line thereof.
Driving means, comprising a means for charging the object to be polished into the cylindrical member, and positioned in the cylindrical member, so as not to hinder the rotation of the cylindrical member, An abrasive apparatus characterized by supporting a centrifugal abrasive projector. 2. A spiral ridge is provided on an inner peripheral surface of the cylindrical member, and when the cylindrical member rotates, a material to be polished to be polished therein has a spiral shape. 2. The cleaning apparatus according to claim 1, wherein the apparatus is adapted to be moved by being screw-fed to the ridge. 3. An end face plate which covers an end face opening of the cylindrical member is disposed at at least one end of the cylindrical member, and is provided on a cylindrical wall of the cylindrical member near the end face plate. It is characterized by being provided with a discharge port for the object to be polished, and having a large number of through holes smaller than the object to be polished and larger than the material to be polished in the cylindrical wall of the cylindrical member. The polishing apparatus according to claim 1 or 2, wherein: 4. A supporting and driving means for said cylindrical member comprises a pair of rollers arranged substantially horizontally and substantially parallel to each other,
Or a plurality of pairs of rollers, wherein the cylindrical member is placed on or unloaded from the rollers and can be replaced to be replaced. The cleaning apparatus described in (1).