JPS586547B2 - Takaikiyoudo Motsu Peening Flap Kozotai - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on a patent application filed on April 16, 1972.
This invention relates to an improvement of the invention described in No. 993.

Patent No. 1099584 (Japanese Patent Publication No. 56-43791) dated April 16, 1971 describes and claims a peening flap structure having high strength.

The flap structure is flexible, elastic, tenacious, and cushioning with high bending durability and shape retention.
It has a tear-resistant material.

At least one peening particle support plate formed of a metal capable of withstanding high bending and impact stresses and resisting deformation is mechanically fastened to the strip adjacent to one end of the strip. ing.

A plurality of refractory-hard, impact-cracking peening particles are metallurgically bonded to the exposed surface of the support disc.

In use, at least one flap is mounted to the hub such that the support disk and peening particles on the flap are at the end of the flap remote from the hub.

The hub is rotated while the flap is pressed against the base to be peened.

The peening particles on each support plate perform the standard peening function of each particle by striking the base in turn, but prevents the uncontrolled scattering that occurs in conventional shot peening.

The present inventor has now developed a method for peening particles by fastening a peening particle support disc to an elongated strip such that the peening surface of the support disc is inclined at an acute angle of 25° to 80° relative to the length of the belt. It has been discovered that the useful life of the flap structure is greatly extended.

Therefore, the present invention provides a flexible, elastic, tenacious, cushioning material with a high degree of bending durability and shape retention.
A peening flap structure having a tear-resistant material is provided.

At least one peening particle support disc is secured to the elongate strip adjacent to one end of the strip, the peening surface of the support disc being inclined at an acute angle of 25° to 80° relative to the length of the strip. ing.

The support plate is formed from a metal that has the ability to withstand high bending and impact stresses while resisting deformation, and a plurality of peening particles, which are refractory-like and hard to resist impact cracking, are metallurgically applied to the exposed surface of the support plate. is combined with

Referring now to the accompanying drawings, there is shown a high strength peening flap, generally designated 40, constructed in accordance with the present invention.

The peening flap 40 consists of an elongated strip 42, two peening grain support discs 43 and 45 facilitated by washers 46 to hold the same, and a plurality of peening grains 48 on each support disc. .

The elongate strip 42 is formed from a pliable, resilient, tenacious, cushioning, tear-resistant material with a high degree of bending durability and shape support.

The band 42 must have the above-mentioned properties to withstand the peening impact while holding the peening particle supports 43 and 45 on the band, and to return the peening particles to the position for subsequent peening impact. Must be.

A highly satisfactory combination of the necessary properties was obtained by Liebes Brother & Co., with offices in New York City, New York, USA.
Reeves Brothers, Ine. “Reeve-cote 762” available from )
It is found in polyurethane impregnated nylon scrims known as 5''.

Neoprene impregnated nylon scrims have also been found to be very satisfactory.

These materials have the necessary properties, with tensile strength, tear resistance and shape retention imparted by the nylon scrim.

The elongated strip is formed by folding the material of a double length strip in half so that it can be easily attached to the cylindrical hub 51.

The hub 51 has an axially drilled hole adjacent and in communication with the outer periphery of the hub such that the folds of the elongated strip 42 are oriented within the radius of the hub to retain the strip 42 to the hub 51. the cylindrical pin is then inserted into the same fold and axially downwardly into said hole.

Peening particle supports 43 and 45 are rigidly attached to the elongated strip 42 adjacent to and equidistantly spaced from the overlapping ends of the strip.

Each support plate is formed of a metal capable of withstanding high bending and impact stresses and resisting deformation.

These properties serve to hold the peening particles on the support plate and in place and at the same time help absorb stresses that would damage or destroy the peening particles.

The peening particle supports 43 and 45 are mechanically fastened to the elongated strip 42 by being formed as rivets.

The rivet details are passed through holes in both layers of the band 42,
A washer 46 is then fitted around the rear portion of the shaft and the rear portion of the shaft is then expanded to securely fasten the support plate to the elongated strip.

Other methods of rigidly mechanically fastening the support disc to the elongated strip may also be used within the scope of the invention, for example the support disc may be shaped with a threaded shank around which a nut is threaded. I don't mind.

In the case of the illustrated riveted attachment, the material of the peening particle supports 43 and 45 must, in addition to the above requirements, be sufficiently ductile to permit the deformation necessary for fastening.

Annealed 1008 steel (up to 0.10% C, 0.2
It has been found that carbon steels with Mn of 5 to 0.50%, P of up to 0.04%, S of up to 0.050%) have a highly satisfactory combination of the required properties.

The peening particles 48 are made of a high hardness impact cracking resistant material and are metallurgically bonded to the exposed surfaces of the supports 43 and 45.

The particle support disks 43 and 45 and the peening particles 48 are
Of course, it must be compatible with metallurgical combinations.

Such bonding may be accomplished by brazing, casting peening particles in place on the support plate, sintering, or any other method available to achieve the necessary bonding.

Refractory hard impact crack resistant peening particles are utilized because their integrity must be maintained throughout the life of the peening flap to maintain a constant impact pressure.

Sintered tungsten carbide shot of refractory hardness has been found to have an excellent combination of necessary properties.

However, other sintered carbides, such as Tic and Tac,
Ceramic materials such as B4c and hot pressed alumina and other abrasion resistant refractory hard peened particles are also useful.

The elongated strip 42 is longitudinally cut between the peening particle supports 43 and 45 perpendicular to the ends of the band to allow independent peening action by the particles on the individual support disks 43 and 45.

A rivet 50 located at the bottom of the split between supports 43 and 45 at the center of the width of the strip attaches to each other the two sections of strip of double length of strip material and The ends of the length strips are overlapped and support discs 43 and 45 are passed through this section and tightened to cover the respective peening surfaces of the strips 4.
It is designed to be tilted with respect to the length of 2.

If the peening surfaces of the supports 43 and 45 are inclined relative to the length of the strip 42 in the static state, then in use the strips can be used to impinge the peening particles 48 perpendicularly on the surface 53 to be peened. It does not need to be significantly transformed.

This significantly extends the life of the flaps 40 by reducing wear on the portion of the band material directly surrounding the support disk, and allows a large number of flaps to be used with a given diameter hub.

The remarkable improvement in the life of the flap 40 is due to the support plates 43 and 45.
The peening surface of is 25° to 80° to the length of the strip 42
Obtained when tilted at an acute angle of up to °.

As can be seen in FIG. 1, mounting the flap 40 on the hub 51 is the same as finishing the peening surface of the support plate so that the same surface is inclined relative to the radius of the flap wheel relative to the length of the strip 42. Tilt at an acute angle.

The optimal inclination angle θ is the hub radius r, the effective flap length f from the hub 51 to the peening particle support plates 43 and 45,
and the distance o that the hub is separated from the working surface 53 in use.
is a function of

This relationship is expressed as follows.

θ=tan-1(o+r)/(f+r)2-(o+r)
2]1/2 However, the angle of inclination can be set within the preferred range of 40° to 70° and works well for most practical applications.

In one particular instance, 47.625 mm (1.87
A peening flap 40 with an effective flap length of 5 inches) and a support plate slope of 45°±5° was used on a 38.1 millimeter (1.5 inch) diameter hub 51.

It was discovered that the life of this flap construction was nearly four times that of a similar flap with the peening surface of the support plate parallel to the length of the strip.

Additionally, this slope allows twelve flaps to be used on a hub where only three straight flaps 10 could be used.

As a result of further research into this flap structure, it was revealed that the optimal inclination angle of the support plate is 65°±5.
.degree., and this angle increased the flap life to five times that of a similarly straight flap 10.

Additional Relationships The present invention is disclosed in Patent No. 1099584 (Japanese Patent Publication No. 56-4379 dated April 16, 1972) as described in the opening patent claim column.
Although the present invention has all the essential features of the original invention pending under No. 1) and achieves the same effects as the original invention, the present invention is characterized by This is an improved product that extends the life of the flap by 4 to 5 times compared to the flap of the original invention by fixing the peening particle support plate to the belt with the angle at an acute angle of 25° to 80°. It is.

[Brief explanation of drawings]

1 is an end view of a peening vehicle utilizing a plurality of high strength peening flaps constructed in accordance with the present invention; FIG. 2 is a front view of one of the flats shown in FIG. 1; and FIG. The figures are an end view of the flap shown in FIG. 1, and FIG. 4 is a rear view of the flap shown in FIG. 40... "peening flap structure", 42
・・・・・・``Long and thin strip'', 43.45・・・・・・``
"peening particle support plate", 48... "peening particle".

Claims (1)

[Claims] 1 a flexible, resilient elongate strip made of a cushioning, tear-resistant material with high bending strength and shape retention, at least one of the following components being mechanically secured to said strip near one end of said strip: one peening particle support disk, said peening particle support disk being made of a metal capable of resisting deformation while withstanding high bending and impact stresses; and metallurgy applied to the exposed surface of said peening particle support disk. In a high strength peening flap structure having a plurality of chemically bonded refractory hard impact fracture resistant peening particles, the peening particle support plate 43 has the peening particles 48 metallurgically bonded. 45 is fixed to the strip at an acute angle of inclination of the peening surface of the peening particle support plate from 25° to 80° with respect to the longitudinal direction of the elongated strip 42. body.