JP4257822B2 - Centrifugal projection shot blasting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal projection type shot blasting apparatus that projects a metal shot from a centrifugal projector to perform surface treatment such as steel disking , shot peening of steel parts, or pre-painting treatment.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a centrifugal projection type shot blasting apparatus, which is a mechanical blasting method, has been widely used for disk spinning of steel materials and shot peening of steel parts. This centrifugal shot-type shot blasting device uniformly irradiates the surface of the workpiece with steel wire, which is a metal particle, or cut wire particles made by cutting a wire (hereinafter simply referred to as a shot). is doing.
[0003]
During the blasting process of the centrifugal projection type shot blasting apparatus, the shot collides with the shot and the surface of the workpiece or the side wall of the projection chamber at high speed to generate heat. However, the generated heat is naturally radiated or exhausted while slightly heating the side wall of the exhaust duct.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above, and is to effectively utilize heat generated during shot blasting. Centrifugal projection type shot blasting that can be used as a heat source for heating equipment of front and rear processing devices placed before and after the shot blasting device, extending the life of components of the centrifugal projection type shot blasting device that is heated and deteriorates early An object is to provide an apparatus.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a centrifugal projection type shot blasting apparatus according to the present invention is a centrifugal projection type shot blasting apparatus that projects a metal shot from a centrifugal projector onto an object to be processed. side walls and a shot tank for re-use to recover the shots, provided with a heat exchange system according to the powder or fluid-like heat medium, the heat medium is, the side walls of the exhaust duct, the side walls of the projection chambers, And a heat medium transport pipe penetrating through the heat exchange mechanism provided in the shot tank are arranged before and after the centrifugal projection type shot blasting apparatus. is the, this being connected via a supply and recovery unit to the heating equipment of the post-processing apparatus of the pretreatment device and a surface-treated article to be treated of the workpiece The features.
[0006]
[Action]
Since the heat medium heated by the heat generated during the shot blasting process according to the present invention is supplied to the supply recovery system heat of the heat medium can be used to heat the heating equipment prior to post-processing equipment, heating equipment This eliminates the need for fuel as a heat source. The supply / recovery device circulates the heated heat medium and supplies the heat of the heat medium to the heating device of the pre-treatment apparatus.
[0007]
Note that shot projection in shot blasting includes a centrifugal projection type and a pressure projection type, and the centrifugal projection type is suitable for the present invention because the projection range is wide and the shot is heated. On the other hand, in the pressure projection type, that is, the projection by the pressure air, the effect is not obtained because the shot is cooled by the air.
[0008]
In the present invention, the heat exchanging mechanism means one having a heat receiving means for receiving heat efficiently structurally, and the system is not limited. For example, an apparatus in which a fin-like cooling plate is combined with a tubular shape having a cross-sectional outer shape, a square shape, or a polygonal shape, or a collecting pipe shape in which a plurality of small pie-shaped shapes are connected may be used. In either case, a fan or a pump that encloses any of gas, liquid, and granular material, which is a heat medium, in the pipe and enables circulation is provided.
[0009]
Moreover, the shot material used in the present invention is preferably a metal shot, particularly a steel shot. Glass and ceramics are not suitable because of their low thermal conductivity. Further, in the present invention, the pretreatment device or the posttreatment device is a device used either before or after the centrifugal projection type shot blasting device, for example, air that heats liquid water for chemical conversion treatment or dries the coating surface. Is a device that can raise the temperature by a heat medium.
[0010]
In the present invention, the centrifugal projection type shot blasting apparatus means a plurality of centrifugal projectors or a plurality of rollers to convey a workpiece, an entrance / exit of the workpiece, a projecting material scattering prevention seal component, and an inspection door. In addition, a protective plate made of high wear resistance, a liner, and the like are attached to the wall surface of the projection chamber that has a ventilation opening and the like and directly hits a shot. Further, the material is a centrifugal projector, projection wall, protective plate, liner, etc. are all made of metal and have excellent thermal conductivity.
[0011]
In the present invention, the exhaust duct is a tubular structure communicating from the projection chamber of the shot blasting device to the dust collector, and the cross-sectional shape of the tube may be round or square, but the shape and configuration are not particularly limited. It works to guide dust generated in the projection chamber to the dust collector together with air.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a flow chart of a surface treatment line centered on a centrifugal projection type shot blasting apparatus, FIG. 2 is a schematic side view showing a main part of a shot circulation mechanism of the centrifugal projection type shot blasting apparatus, and FIG. 4 is a schematic sectional view centering on the projection chamber and the exhaust duct, FIG. 4 is an enlarged sectional view of the main part of the side wall of the projection chamber in FIG. 3, FIG. 5 is a sectional view detailing the exhaust duct portion in FIG. It is principal part sectional drawing of the shot tank which accumulates.
[0013]
In FIG. 1, a material supply device 1 and a preliminary correction device 2 as a pretreatment device are arranged from the left side, a centrifugal projection type shot blasting device 3 at the center, and a lubricant film device or a coating device as a posttreatment device on the left side. 4, a drying device 5 and a material collecting device 6 comprising a steel material conveying and collecting means are provided.
[0014]
The main part of the shot circulation mechanism of the centrifugal projection type shot blasting device 3 is shown in FIG. 2 and projected from the plurality of centrifugal projectors 3B and 3B toward the wire as the workpiece W in the projection chamber 3A. The shots are collected from the hopper 3C to the bottom of the bucket elevator 3D, transferred to the upper end of the bucket elevator 3D, collected and supplied to the shot tank 3E, and circulated and supplied from the shot tank 3E to the centrifugal projectors 3B and 3B. It is in the mechanism to do.
[0015]
Next exhaust system centrifugal projection type shot brass winding device 3 will be described with reference to FIG. An exhaust duct 7 communicating with a dust collector (not shown) is connected to the upper part of the projection chamber 3A, and air is taken in from an air intake 3F provided on the side of the projection chamber 3A, and centrifugal projection is performed in the projection chamber 3A. Blasting is performed by the machines 3B and 3B, and the dust that has risen is entrained and sucked into the dust collector (not shown) from the exhaust duct 7 to collect the dust.
[0016]
Next, the heat exchange mechanism on the side wall of the projection chamber 3A of the centrifugal projection type shot blasting apparatus 3 will be described with reference to FIG. The outer surface of the side wall of the projection chamber 3A has an uneven surface 3G, and the outer surface of the uneven surface 3G is covered with a cover-like heat medium transport pipe 3I with a gap 3H. And the gap 3 H powdery or fluid-like heat medium to R (e.g. gas, liquid, granule, etc.) of the side wall surface which is heated by the collision with the shot while flowing upward from the lower heat and thermal It is exchanged to raise the temperature of the heat medium R and sent to a heat exchange mechanism (described later) of the shot tank 3E.
[0017]
Next, the heat exchange mechanism on the side wall of the exhaust duct 7 will be described with reference to FIG. This is basically the same as the heat exchange mechanism on the side wall of the projection chamber 3A. That is, the outer surface of the side wall of the exhaust duct 7 is formed with an uneven surface 7A, and is covered with a cover-like heat medium transport pipe 7C with a gap 7B outside the uneven surface 7A. Then, the powder or fluid heat medium R flows through the gap 7B from the lower side to the upper side to exchange heat with the exhaust air heated to slightly increase the temperature of the heat medium R, so that the projection chamber 3A is heated. Sent to heat exchange mechanism.
[0018]
Next, the heat exchange mechanism of the shot tank 3E will be described with reference to FIG. The shot tank 3E is provided with a heat medium transport pipe 8 that passes through the heat medium transport pipe 3I, which is a heat exchange mechanism of the projection chamber 3A, penetrating left and right. A position in the shot tank 3E in the heat medium transport pipe 8 is provided. A plurality of fin-like cooling plates 8A, 8A are provided on the outer peripheral surface at appropriate intervals. In addition, a heat insulating material 8B for preventing heat dissipation is mounted on the outer periphery of the other heat medium transport pipe 8, and inside the powder or fluid sent from the heat medium transport pipe 3I which is a heat exchange mechanism of the side wall of the projection chamber 3A. The heating medium R flows through the mechanism.
[0019]
Therefore, the heat medium R flowing in the heat medium transport pipe 8 is efficiently heat-exchanged via the plurality of cooling plates 8A and 8A in the shot tank 3E in which the shot S heated by colliding with various parts is stored. After further increasing the temperature, it is used as heating for a heating device of a pre- and post-treatment device (for example, a drying device 5 disposed after the coating device 4).
[0020]
As described above , by supplying the exhaust duct 7, the projection chamber 3A side wall, and the shot tank 3E in this order as the circulation path of the heat medium R, the heating temperature of the heat medium R can be sequentially increased and the heat medium R can be efficiently heated. .
[0021]
In the embodiment of the present invention, an example in which a wire is used as the workpiece W has been described. However, the material, size, and shape of the workpiece are not limited. Further, the surface treatment of an object to be treated can be applied to various surface treatments such as pre-painting treatment such as disking and shot pinning.
[0022]
【The invention's effect】
As is apparent from the above description, the present invention can effectively utilize heat generated during shot blasting. In addition, since each component of the centrifugal projection type shot blasting device is cooled by a heat medium, a component that deteriorates early under the influence of heat can be extended in life. Furthermore, the efficiency is further improved by performing heat exchange with the heat medium in order from the low temperature portion to the high temperature portion. Further, by supplying the heated heat medium to the supply / recovery device and using the heat of the heat medium as heating of the heating device of the front / rear processing device of the centrifugal projection type shot blasting device, the running cost is greatly reduced.
[Brief description of the drawings]
FIG. 1 is a flowchart of a surface treatment line.
FIG. 2 is a schematic side view showing a main part of a shot circulation mechanism of a centrifugal projection type shot blasting apparatus.
FIG. 3 is a schematic cross-sectional view centering on a projection chamber and an exhaust duct.
4 is an enlarged cross-sectional view of a main part of a projection chamber side wall in FIG. 3;
5 is a cross-sectional view of a main part centering on an exhaust duct part in FIG. 3. FIG.
FIG. 6 is a cross-sectional view of a main part of a shot tank portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Material supply apparatus 2 Preliminary correction apparatus 3 Centrifugal projection type shot blasting apparatus 3A Projection chamber 3B Centrifugal projector 3C Hopper 3D Bucket elevator 3E Shot tank 3F Air intake 3G 7A Uneven surface 3H 7B Gap 3I 7C 8 Heat medium transport pipe 4 Lubricant coating device or coating device 5 Drying device 6 Gathering device 7 Exhaust duct 8A Cooling plate 8B Thermal insulation material R Heat medium S Shot W Processed object

Claims (1)

In the centrifugal projection type shot blasting device 3 for projecting a metal shot from the centrifugal projector 3B onto a workpiece,
The shot tank 3E for collecting and reusing the side wall of the projection chamber 3A, the exhaust duct 7 and the shot S is provided with a heat exchange mechanism using a powder or fluid heat medium R, and the heat medium R The side wall of the exhaust duct 7, the side wall of the projection chamber 3A, and the shot tank 3E can be supplied to each heat exchange mechanism in this order, and the heat passing through the heat exchange mechanism provided in the shot tank 3E medium transport tube 8, through the supplying and collecting apparatus for heating equipment of the are arranged before and after the centrifugal projection type shot blasting device 3, the post-processing apparatus of the pretreatment device and a surface-treated article to be treated of the workpiece centrifugal projection type shot blasting apparatus characterized by being connected Te.

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