JP2005230996A - Blasting blade and wear resistant plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remarkably improve a durable time while suppressing cost by efficiently imparting wear resistance and abration resistance to a blasting blade. <P>SOLUTION: The blasting blade 10 comprises a blade body 12 and a wear resistant plate 14 attached to the blade body 12. The wear resistant plate 14 is formed of SiC or other ceramics and detachably attached to the blade body 12. The wear resistant plate 14 is formed in lateral and vertical symmetry and appropriately mountable on the blade body 12 whichever one of longitudinal end parts 14A, 14B is turned in the rotation axis direction of a rotor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a blasting blade that is attached to a rotor of a rotor and projects abrasives in a shot blasting apparatus, and a wear-resistant plate that is attached to the blade, and in particular, to improve the wear resistance and wear resistance of the blasting blade. It relates to improving and improving the service life.

  In the shot blasting apparatus, the grinding material supplied into the rotor is blown by a plurality of blades detachably attached to the rotating body and projected onto the grinding material. In this case, since the blade is rotating at a high speed, the running surface of the abrasive is gradually worn and consumed due to collision with the supplied abrasive and friction caused when the abrasive runs on the blade. The tendency to do is seen.

  For this reason, conventionally, attempts have been made to improve wear time by imparting wear resistance and wear resistance to the blade. Specifically, the blade itself may be formed from a special cast iron such as high Cr cast iron, a heat-treated material, a material having excellent wear resistance such as ceramics, or the surface of the blade may be covered with a wear resistant material. (For example, refer to Patent Document 1).

  However, if the entire blade is formed of a wear-resistant material in this way, or if a coating is formed on the surface of the blade, it is necessary to replace the blade itself when the blade is worn out. The problem like this was invited.

  That is, the blade does not wear out evenly on the entire running surface side of the abrasive, but in particular, the portion that actually becomes the path of the abrasive tends to be heavily consumed. Specifically, since the abrasive is projected by the centrifugal force generated by the rotation of the blade, wear occurs from the end portion of the blade running surface located particularly on the vector direction side of the centrifugal force. The part that becomes the path of the material is worn out most quickly.

  For this reason, there are still some remaining parts that can sufficiently withstand use, and even when only the part that becomes the path of the abrasive material is consumed, the entire blade must be replaced. There is a problem that a high-performance material excellent in wear resistance and wear resistance cannot be used efficiently, and as a result, waste is generated and the cost increases unnecessarily.

In particular, the blade used for the rotor of the shot blasting device may cause vibration and noise during rotation due to the difference in weight due to wear even when only some of the blades are worn out. It became necessary to replace not only the blades that needed to be replaced but also all of the blades, including the other blades, and this further spurred a decrease in wear resistance efficiency and an increase in cost.
Japanese Utility Model Publication No. 8-1066

  In view of the above problems, the problem to be solved by the present invention is to provide wear resistance and wear resistance to a blasting blade efficiently, and to dramatically improve the service life while suppressing costs. It is an object of the present invention to provide a blasting blade and a wear-resistant plate that can be used.

  The present invention provides, as a first means for solving the above-mentioned problems, a blasting blade that is attached to a rotor of a rotor and projects an abrasive material. The blade includes a blade main body, a blade main body, Among them, it consists of a wear-resistant plate attached to at least the running surface side of the abrasive, and the wear-resistant plate is made of a material that is more excellent in wear resistance than the blade body and is detachably attached to the blade body. A blasting blade is provided.

  As a second means for solving the above-mentioned problems, the present invention is characterized in that, in the first solution means, the blade body is made of high Cr cast iron and the wear-resistant plate is made of ceramics. A blasting blade is provided.

  According to the present invention, as a third means for solving the above-described problems, in any one of the first and second solving means, the wear-resistant plate has any end in the longitudinal direction at the rotation of the rotating body. The present invention provides a blasting blade characterized by being attached to a blade body even if it is arranged on the central axis side.

  According to the present invention, as a fourth means for solving the above-described problem, in any one of the first to third solving means, the wear-resistant plates are formed symmetrically and vertically symmetrical. A blasting blade is provided.

  According to the present invention, as a fifth means for solving the above problem, in any one of the first to fourth solving means, the wear-resistant plate is fitted in a groove formed in the blade body. The present invention provides a blasting blade that is detachably attached to a blade body.

  According to the present invention, as a sixth means for solving the above-mentioned problems, in any one of the first to fifth solving means, the wear-resistant plate is detachably attached to the blade body by an adhesive that can be peeled off by heating. It is intended to provide a blasting blade that is mounted on

  The present invention also provides the following wear-resistant plate that can be applied to any one of the first to sixth solutions. That is, the present invention provides, as a seventh means for solving the above-described problems, a wear-resistant plate attached to a blast blade that is attached to a rotor of a rotor and projects abrasives. Is a wear-resistant plate made of ceramics and detachably attached to a blade.

  According to the present invention, as an eighth means for solving the above-described problem, in the seventh solving means, the blasting is performed even if any end portion in the longitudinal direction is arranged on the central axis side of the rotation of the rotating body. The present invention provides a wear-resistant plate characterized in that it is attached to an industrial blade.

  According to the present invention, as a ninth means for solving the above-described problems, the wear-resistant plate according to any one of the seventh and eighth solving means, wherein the wear-resistant plate is formed symmetrically and vertically. Is to provide.

  According to the present invention, as described above, since the blade is formed of the blade body and the wear-resistant plate that is detachably attached to the running surface side of the blade body, wear occurs due to long-term use. Even in this case, it is possible to impart wear resistance by replacing only the wear-resistant plate without replacing the blade body, so there is an actual benefit that the service life can be improved efficiently while reducing costs. is there.

  In particular, in this case, according to the present invention, as described above, the wear-resistant plate is formed to be bilaterally symmetrical and vertically symmetrical, for example, so that any end in the longitudinal direction is the central axis of rotation of the rotating body. Even if it is arranged on the side, it is attached to the blade body, so even if the wear resistant plate is mainly used as a path for abrasive material and wears near the end opposite the rotational direction where wear is severe, the direction is reversed. By attaching it to the blade body again, it is possible to allocate the vicinity of the end portion on the side with less wear to the path of the abrasive material, and one wear-resistant plate can be reused for wear resistance and wear resistance. There is an advantage that the wear resistance and wear resistance can be efficiently imparted to the blade while further reducing the cost, and the durability time can be dramatically improved.

  According to the present invention, as described above, since the wear-resistant plate is fitted in the groove and is detachably attached to the blade body, it is securely attached to the blade body sufficiently corresponding to the high-speed rotation of the blade. There are real benefits that can be made.

  Furthermore, according to the present invention, as described above, since the wear-resistant plate is detachably attached to the blade body with an adhesive that can be peeled off by heating, there is an advantage that it can be easily detached from the blade body. .

  The embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a blasting blade 10 according to the present invention. This blasting blade 10 is used in a shot blasting apparatus of a rotor (not shown). It attaches to a rotary body and projects the grinding material 1 on the grinding material which is not shown in figure by rotation of a rotary body. As shown in FIGS. 1 and 2, the blast blade 10 includes a blade body 12 and a wear-resistant plate 14 attached to the blade body 12.

  As shown in FIGS. 1 and 2, the blade body 12 is formed to have a substantially trapezoidal mounting portion 12 </ b> A fitted to a rotor of a rotor (not shown) and to extend from the mounting portion 12 </ b> A. After the attachment to the rotating body, there is a traveling part 12B that projects the abrasive 1 to be projected from the rotating body. The blade body 12 can be detachably attached to the rotor rotating body by the attachment portion 12A. Therefore, if necessary, the blade 10 can be removed from the rotor of the rotor (not shown) for maintenance and replacement.

  As shown in FIGS. 1 and 2, the wear-resistant plate 14 is attached to at least the traveling surface side of the abrasive 1 in the blade body 12. More specifically, in the illustrated embodiment, the wear-resistant plate 10 is attached to the traveling surface side of the abrasive 1 of the traveling portion 12B of the blade body 12 as shown in FIGS. Therefore, after the abrasive material 1 put in from the chute of the rotor (not shown) is received by the wear-resistant plate 14, it travels on the wear-resistant plate 14 by the rotation of the blade 10 by the rotating body, and the tip of the blade 10. Is projected onto a workpiece to be ground (not shown). In this case, the wear-resistant plate 14 imparts wear resistance and wear resistance to the blade body 12 against the impact received when the abrasive 1 is projected.

  Therefore, in this case, the wear-resistant plate 14 is formed from a material that is more excellent in wear resistance than the blade body 12. Specifically, in the illustrated embodiment, the blade body 12 is formed from high Cr cast iron to impart some strength and wear resistance to the blade body 12 itself, while the wear plate 14 is For example, it is formed from ceramics that are more excellent in wear resistance and wear resistance than this high Cr cast iron.

Specific examples of the ceramic forming the wear-resistant plate include SiC, Si ₃ N ₄ , Al ₂ O ₃ , and ZrO ₂ . Since these ceramics are excellent in wear resistance, wear resistance, mechanical strength and heat insulation properties, it is desirable to give sufficient performance to the blade body 12, but it is not necessarily limited to these materials. As long as it is superior in wear resistance than the blade body 12 and can provide the blade body 12 with sufficient wear resistance and wear resistance, not only other ceramics but also other than ceramics. These materials can also be used.

Which material is selected for the wear-resistant plate 14 can be appropriately determined in consideration of workability and cost to the wear-resistant plate 14, and in particular, the material of the abrasive 1 to be projected. It is desirable to select the material of the wear-resistant plate 14 according to the particle size and the like. Specifically, in the case of the abrasive 1 made of a grid having a relatively high hardness, or a brown alumina, white alumina, black silicon carbide, green silicon carbide, ceramic beads, silica sand, diamond silica sand, or the like as the abrasive 1. Is preferably formed of ceramics such as SiC, Si ₃ N ₄ , Al ₂ O ₃ , ZrO _2, etc. as described above, and is similarly ground in the case of the abrasive 1 having other materials. The material 1 can be appropriately selected in consideration of the relationship with the material and the cost.

  The wear-resistant plate 14 is detachably attached to the blade body 12. In the illustrated embodiment, as shown in FIGS. 1 and 2, the groove 12 a is formed so as to slightly enter the attachment portion 12 A on the traveling surface side of the abrasive 1 in the traveling portion 12 B of the blade body 12. The formed wear-resistant plate 14 is attached to the blade body 12 by fitting one of the lateral ends 14 a and 14 b into the groove 12 a of the blade body 12.

  Accordingly, as shown by the arrow A in FIG. 1 (see FIG. 1), the wear-resistant plate 14 is attached to the blade body 12 by fitting one end in the lateral direction into the groove 12a of the blade body 12. On the other hand, it can be removed from the blade body 12 by being extracted from the groove 12a. In this case, since the blade 10 rotates at a high speed, it is desirable to provide an interference fit so that the wear-resistant plate 14 is not easily detached from the blade body 12. Accordingly, the wear-resistant plate 14 can be reliably attached to the blade body 12 sufficiently corresponding to the high-speed rotation of the blade 10.

  Further, in this case, it is desirable to attach the wear-resistant plate 14 to the blade body 12 with an adhesive that can be peeled off by heating. Specifically, an adhesive that can be peeled off by heating on the back surface portion 14C that contacts the blade body 12 and the groove 12a of the blade body 12 or the back surface portion 14C of the wear plate 14 of the wear plate 14. The wear-resistant plate 14 can be fitted into the groove 12 a of the blade body 12.

  Thereby, for example, when removing the abrasion-resistant plate 14 from the blade body 12, the abrasion-resistant plate 14 can be easily removed from the blade body 12 only by heating the blade 10. On the other hand, for example, when the wear-resistant plate 14 is attached to the blade body 12 again, the adhesive such as the back surface portion 14C of the wear-resistant plate 14 and the groove 12a that contacts the wear-resistant plate of the blade body 12 is completely removed. By simply cleaning and reapplying an adhesive to these surfaces, the mounting operation can be easily performed. Accordingly, the wear-resistant plate 14 can be attached to the blade body 12 more firmly and securely while being easily detachable from the blade body 12.

  As described above, the blade 10 is formed of the blade body 12 and the wear-resistant plate 14 attached to the running surface side of the blade body 12, and the wear-resistant plate 14 is detachably attached to the blade body 12. Therefore, even if the wear resistant plate is worn out for a long time, wear resistance can be imparted by replacing only the wear resistant plate without replacing the blade body. Therefore, there is an actual benefit that the service life can be efficiently improved while suppressing the cost.

  Furthermore, in the present invention, the wear-resistant plate 14 may be arranged on either the end portion 14A or 14B in the longitudinal direction on the center axis side of rotation of a rotating body (not shown) (see arrow B in FIG. 1). There is also a feature in that it is attached to the blade body 12. In other words, as shown in FIGS. 1 and 2, the wear-resistant plate 14 according to the present invention can be disposed on the lower side in FIG. The blade body 12 can be appropriately attached.

  Specifically, in the illustrated embodiment, as shown in FIG. 3, the wear-resistant plate 14 has a longitudinal section in which end portions 14 a and 14 b in the transverse direction rise in a wall shape to receive the abrasive 1. Has a substantially U-shape and is formed symmetrically and vertically symmetrical. For this reason, for example, as shown in FIG. 1, after removing the wear-resistant plate 14 from the state in which one end portion 14b in the lateral direction of the wear-resistant plate 14 is disposed on the lower side in FIG. By changing the orientation of the end portions 14A and 14B in the blade body 14 and attaching it to the blade body 14, this time, the other end portion 14a in the transverse direction is disposed on the lower side in FIG. It can also be attached.

  In this case, as shown in FIG. 1, the projected abrasive 1 travels on the wear-resistant plate 14 due to the rotation of the rotating body, and thus is not traveled uniformly on the wear-resistant plate 14. There is a strong tendency to travel mainly in the vicinity of the end located on the vector direction side of the centrifugal force (see the area A1 in the vicinity of the end 14b in the lateral direction in the state shown in FIG. 1). Accordingly, wear mainly occurs from the portion that becomes the path of the abrasive 1 (see area A1 in FIG. 1), and inevitably, the portion that becomes the path of the abrasive 1 (see area A in FIG. 1). Consumption is fastest and intense.

  For this reason, when the portion (see area A in FIG. 1) that becomes the path of the abrasive 1 in the state shown in FIG. 1 is worn and worn, the direction of the end portions 14A and 14B in the longitudinal direction of the wear-resistant plate 14 is changed. Near the end 14a on the side with relatively little wear (see area A2 in FIG. 1) by reversing to the left and right (the direction of the ends 14a, 14b in the lateral direction is reversed upside down) and replacing the blade body 12 again. Can be newly applied to the path of the abrasive 1 and one wear-resistant plate 14 can be reused for wear resistance and wear resistance. As a result, at least the life of the wear-resistant plate can be doubled, and in combination with the inherent wear resistance and wear resistance of the wear-resistant plate, the blade 10 can be efficiently produced while further reducing costs. Abrasion resistance and wear resistance can be imparted to the battery, and the durability time can be dramatically improved.

  Next, an embodiment of the present invention will be described. Using an iron-based grid (hardness Hv of about 820) having a particle size of 0.3 mm to 0.8 mm as an abrasive, the blade 10 of the present invention shown in FIG. The service life of a conventional blade having no wear plate was measured, and the results were compared. Specifically, as an example of the present invention, a blade 10 shown in FIGS. 1 and 2 in which a wear-resistant plate made of SiC is attached to a blade body 12 made of high Cr cast iron is set as a comparative example. As a conventional blade formed from high Cr cast iron not having the wear-resistant plate 14 was measured, and each of the service life was measured, the service time of the conventional blade as a comparative example was about 100h to 120h. On the other hand, in the Example of this invention, it was about 600h-800h, and it was confirmed that the service life improved dramatically. Accordingly, by reversing the direction of the end portions 14A, 14B in the longitudinal direction of the wear-resistant plate 14 (reversing the direction of the end portions 14a, 14b in the lateral direction), and replacing the blade body 12 again, The service life can be further increased to about 1,200 h to 1,600 h, which is about twice as much, and the service life can be further increased dramatically.

  Similarly, by using silica sand (hardness Hv of about 900) having a particle size of 0.15 mm to 0.17 mm as an abrasive, the blade 10 of the present invention shown in FIG. We measured the service life of and compared the results. In this case, similarly, as an example of the present invention, the blade 10 shown in FIG. 1 and FIG. 2 in which the wear-resistant plate made of SiC is attached to the blade body 12 made of high Cr cast iron is set and compared. As an example, when a conventional blade formed from high Cr cast iron not having the wear-resistant plate 14 was set and measured for each service life, the service time of the conventional blade as a comparative example was about 20 to 30 hours. On the other hand, in the Example of this invention, it was about 1,500h-1800h, and it was confirmed that the service life improved drastically. Accordingly, in this case as well, the direction of the end portions 14A and 14B in the longitudinal direction of the wear-resistant plate 14 is reversed left and right (the direction of the end portions 14a and 14b in the transverse direction is reversed up and down) and the blade body 12 is again formed. By substituting for this, the service life can be further increased to about 3,000h to 3600h, which is about twice as long, and the service life can be further increased dramatically.

  The present invention can be applied to, among other blasting apparatuses, a shot blasting apparatus that projects a high-hardness abrasive by rotation of a rotor.

FIG. 1 shows a blasting blade according to the present invention, in which FIG. 1 (A) is a plan view thereof and FIG. 1 (B) is a front view thereof. It is a side view of the blasting blade of the present invention. 3A and 3B show a wear-resistant plate used in the present invention, where FIG. 3A is a side view thereof and FIG. 3B is a front view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grinding material 10 Blasting blade 12 Blade body 12A Mounting portion 12B Traveling portion 12a Groove 14 Wear-resistant plate 14A, 14B End portion 14a, 14b of wear-resistant plate in lateral direction 14C Rear portion of wear-resistant plate

Claims (9)

A blade for blasting that is attached to a rotor of a rotor and projects an abrasive material, the blade comprising a blade body and an abrasion-resistant plate attached to at least a traveling surface side of the abrasive material of the blade body, The blasting blade is characterized in that the wear-resistant plate is made of a material having higher wear resistance than the blade body, and is detachably attached to the blade body. 2. The blasting blade according to claim 1, wherein the blade body is made of high Cr cast iron and the wear-resistant plate is made of ceramics. 3. The blasting blade according to claim 1, wherein the wear-resistant plate has the end portion in the longitudinal direction arranged on the central axis side of the rotation of the rotating body. A blasting blade characterized by being attached to a blade body. The blasting blade according to any one of claims 1 to 3, wherein the wear-resistant plate is formed to be bilaterally symmetrical and vertically symmetrical. The blasting blade according to any one of claims 1 to 4, wherein the wear-resistant plate is fitted in a groove formed in the blade body and is detachably attached to the blade body. A blasting blade characterized by having 6. The blasting blade according to claim 1, wherein the wear-resistant plate is detachably attached to the blade body by an adhesive that can be peeled off by heating. Blasting blade. An anti-abrasion plate attached to a rotor of a rotor and attached to a blasting blade for projecting abrasives, the anti-abrasion plate formed of ceramics and detachably attached to the blade. The wear-resistant plate according to claim 7, wherein the wear-resistant plate is attached to the blasting blade even if any end in the longitudinal direction is disposed on the central axis side of the rotation of the rotating body. plate. The wear-resistant plate according to any one of claims 7 and 8, wherein the wear-resistant plate is formed symmetrically and vertically.

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