JPH042997Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention can be used, for example, as a scientific teaching material for learning the features of shape memory alloys, toys that utilize the unique properties of shape memory alloys, and other practical applications. The present invention relates to a memory processing jig for shape memory alloy.

[Prior Art] As is already known, shape memory alloys are made of, for example, an alloy of nickel and titanium, and after giving the alloy a desired shape, it is heated to a temperature above the austenite transformation end temperature (Af point). A metal material that has the property of memorizing its shape metallographically through memory treatment.Shape memory alloys that have undergone shape memory treatment in this way deform within a predetermined stress range due to external force. However, by simply heating it to a temperature slightly higher than the temperature at which it deforms,
It has a unique property of instantly recovering its original shape. Therefore, applications for alloys with such unique properties are being actively developed in various industrial fields, and in addition to practical applications, various scientific toys that utilize their unique properties have also been proposed. For example, a wire rod made of shape memory alloy is bent and formed into a specific shape, such as a "mouse" or "rabbit", and this is
There are toys that have undergone shape memory treatment by heating and cooling them to ℃. Even if this toy is deformed by applying an external force, as long as it is within the range that allows for the predetermined stress deformation, it can be restored to its previously memorized shape by heating to the required temperature range. can. For this reason, it is a suitable teaching material for attracting scientific interest.

[Problems to be Solved by the Invention] However, the shape memory alloy toys mentioned above tend to lose interest and lack interest because they always restore to a fixed shape.

[Purpose of the invention] Therefore, the present invention provides a jig that can easily shape-memory-process a linear or band-shaped shape memory alloy material into a uniquely created desired shape, and can be used as a shape memory alloy toy or educational material. The aim is to increase interest in

[Means for achieving the object] The shape memory processing jig of the present invention that can achieve the object includes a heat-resistant substrate having a large number of insertion holes at regular intervals on a plane, and the insertion holes. It consists of a large number of heat-resistant pins that can be inserted and removed freely on the substrate, and a linear or band-shaped shape memory alloy material is wound around the pins that are planted on the substrate to shape the shape memory alloy material into a desired shape. It is characterized by being able to be restrained.

[Operation] A pin is planted in the required insertion hole on the board, a shape memory alloy material is wrapped around the pin to restrain the shape memory alloy material in the desired shape, and then a heat source nearby such as a gas stove is used. By heating and cooling the shape memory alloy material to 70 to 600°C, a desired shape can be memorized.

[Example] The example shown in the figure will be described. The substrate 1 is made up of a square bottom plate 2 and a square-shaped perforated plate 3 and a square-shaped perforated plate 4 stacked on top of each other with vertical intervals between them. The bottom plate 2 and the perforated plates 3 and 4 are all made of heat-resistant steel, and each of the perforated plates 3 and 4 has a large number of insertion holes 5, 5, . . . of the same diameter formed at regular intervals in a matrix. Attachment holes into which screws 7 are inserted are formed in the four corners of the bottom plate 2 and the perforated plates 3 and 4. Numerals 6 and 6' are hollow pipe-shaped spacers inserted through screws 7 to maintain the distance between the bottom plate 2 and the perforated plates 3 and 4. 8 is a handle fixed to screw 7. A large number of pins 9, 9... made of heat-resistant steel are connected to the perforated plate 3.
It penetrates from the insertion hole of the perforated plate 4 to the insertion hole of the porous plate 4, and its tip abuts against the bottom plate 2, so that it can be planted straight on the substrate 1.

When the linear shape memory alloy material 10 is to be shaped into a star-shaped contour figure, for example, pins 9,
9... is planted, and the shape memory alloy material 10 is wound around the pins 9, 9... to restrain the shape memory alloy material 10 from moving between the pins. In this case, in order to prevent the shape memory alloy material 10 from unnecessarily floating up from the substrate 1, it is preferable to place a weight or a stopper on the shape memory alloy material 10, if necessary.

Although not shown, the shape memory alloy material 10 may be bent into a star shape and both ends thereof may be inserted into a heat-resistant short tube to be joined to each other.

The substrate 1 with the shape memory alloy material 10 set in this way is placed on a gas stove at 400°C or more while the shape memory alloy material 10 is restrained in its desired bent shape.
After heating to a temperature range of 500°C and maintaining that temperature for 10 minutes to 1 hour, it is cooled naturally in the atmosphere or quenched by pouring water on it. As a result, the shape memory alloy material 10 is memorized into a star shape.

Since the pins 9, 9... can freely change their planting positions on the substrate 1, the shape memory alloy material position is 0.
A person can draw a desired shape based on his or her own creation.

In this embodiment, the bottom plate 2 is made of a blank plate, but the bottom plate 2 can also be made of a perforated plate to make it easier for the flame of the gas stove to rise, thereby improving heating performance. In this case, if the holes in the perforated plate are not connected in a straight line with the insertion holes of the perforated plates 3 and 4, the tip of the pin 9 can be blocked by the perforated plate.

[Effects of the invention] As explained above with respect to the embodiments, the shape memory processing jig of the present invention allows a plurality of pins to be freely planted on the substrate, so it is possible to use a linear or strip shape memory alloy material. Shape memory processing can be performed to obtain a desired shape by constraining the pins. For this reason, creativity can be exhibited and the value of use as a toy or teaching material is increased, and it is also useful in practice, such as being able to be used for small-lot production of a wide variety of products.

[Brief explanation of the drawing]

The drawings show one embodiment of the shape memory processing jig of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIG. 3 is a longitudinal sectional view. 1... Substrate, 2... Bottom plate, 3, 4... Perforated plate,
5...Insertion hole, 9...Pin.

Claims (1)

[Scope of utility model registration request] It consists of a heat-resistant substrate with a large number of insertion holes at regular intervals on a flat surface, and a large number of heat-resistant pins that can be freely inserted into and removed from the insertion holes, and has a linear or band-like shape. A shape memory processing jig, characterized in that the memory alloy material is wound around the pins planted on the substrate so that the shape memory alloy material can be restrained in a desired shape.