TWI591253B - Regenerator fabrication method - Google Patents

Description

Regenerator manufacturing method

The present invention relates to a method of manufacturing a regenerator, and more particularly to an improvement of a regenerator structure in an energy conversion device such as a Stirling machine, a pulse tube refrigerator, a vascular engine, a thermosonic engine, or a refrigerator, and a process improvement thereof.

The regenerators used in energy conversion devices such as conventional Stirling machines, pulse tube refrigerators, vascular engines, thermosonic engines or freezers are usually composed of porous metal. For example, the "Heat engine regenerator and stirling engine using the regenerator" is disclosed in U.S. Patent Publication No. US20120151912, the third of which is shown in U.S. Patent Publication No. US20120151912, the regenerator is formed by stacking a plurality of pieces of mesh material layer by layer. .

The general process of the regenerator is to first stack hundreds of pieces of mesh material and then stamp them. The manufacturing process is (1) cutting the mold, (2) stamping hundreds of pieces of the net material into a die, and (3) stacking the net pieces into the implement piece by piece. However, the regenerator of the above-mentioned forming method is not connected and fixed between the respective mesh materials, and it is easy to change the correspondence relationship between the mesh materials during the operation of the device, and the stability is insufficient; on the other hand, due to the large number of mesh materials, It is not easy to load the tools one by one, and the manufacturing process is labor-intensive and time-consuming, and there are many inconveniences in loading and unloading.

Accordingly, in order to improve the stability of the use of the regenerator, the manufacturing yield, the manufacturing efficiency, and the convenience of handling, the present inventors have made research and proposed a regenerator manufacturing method comprising the following steps: a semi-finished part manufacturing step: The porous material is formed into a column shape; a forming step: cutting the column by a thermal cutting means, and the porous material is melted by heat cutting to be combined into a piece.

Further, the porous material is any one or combination of a metal velvet, a plurality of mesh materials stacked on each other, and a plurality of metal velvets stacked on each other.

Further, the plurality of mesh materials have at least two vertical perimeters; in the semi-finished component manufacturing step, each of the mesh materials is aligned with each other by the two perimeters.

In the semi-finished part manufacturing step, the metal velvet is first placed in a container, and the metal velvet is formed by the container.

Further, a preliminary forming step is provided between the manufacturing step of the semi-finished part and the forming step, and in the preliminary forming step, the column is applied to a bonding means, and the bonding means is a diffusion welding means and a sintering means Any one or combination of resistance welding means.

Further, the thermal cutting means is any one or a combination of a laser cutting means and a heating wire cutting means.

Further comprising a combination step of repeating the semi-finished part forming step and the forming step to provide a plurality of blocks, wherein the type of the piece is different from the porosity and the type and porosity of the other block, and then stacking the foregoing A block to combine a regenerator with a change in porosity gradient.

Further, in the forming step, the permanent perforations penetrating through the ends of the column are formed by the thermal cutting means such that each mesh or metal velvet is connected to the periphery of the through hole.

The present invention is also a regenerator comprising: a plurality of mesh materials and/or metal velvets stacked on each other, each mesh material and/or metal velvet having a welded portion at a periphery thereof, and the welded portions of the plurality of mesh materials or metal velvets are fused to each other Connected to form a piece of material.

Further, the number of the aforementioned blocks is plural, and the aforementioned blocks are stacked, wherein the kind of the one piece and the porosity and the kind and porosity of the other block are different to combine a regenerator having a change in porosity gradient.

Further, the porosity of the aforementioned block material changes in a gradient.

Further, the block has a continuous perforation extending through the two ends, and each of the blocks has another welded portion adjacent to the through hole, and the other welded portion of the block is fused to each other.

The effect of the invention is:

1. The method of the present invention utilizes thermal cutting means to melt and bond the stacked webs and/or metal velvets while being cut, thereby enhancing the structural strength of the regenerator and facilitating the loading and unloading of the regenerator. On the other hand, it is no longer necessary to manufacture another die in manufacturing, thereby reducing the cost of product development.

2. The invention improves the structural strength of the regenerator by means of thermal cutting, and can avoid the reciprocator changing the correspondence between the mesh and the metal velvet structure during use, and improving the stability of the product.

3. The invention provides a relatively vertical perimeter by a rectangular mesh material, which facilitates the accurate alignment of the mesh material during stacking, on the one hand shortening the man-hours and labor costs required for manufacturing, and on the other hand, ensuring the alignment of the mesh material mesh. Accuracy, improve the precision and quality of regenerator manufacturing.

4. The invention facilitates the accurate alignment and shaping of the metal velvet by stacking on a container, and on the other hand, can control the stacking density and the porosity, and on the other hand, can improve the precision and quality of the regenerator manufacturing.

5. The present invention cooperates with a combined stack of a plurality of blocks, and a regenerator of different porosity change patterns can be stacked with different use requirements.

(1)‧‧‧

(10) (20) ‧ ‧ cylinder

(10A)(10B)(10C)(10D)(10E)(20A)‧‧‧Block

(11) Around ‧‧

(12) (22) ‧‧‧through holes

(13) ‧‧‧welding

(130) ‧‧‧ Another weld

(2)‧‧‧Metal velvet

(3) ‧ ‧ container

(S1) ‧‧‧Half-finished parts making steps

(S2) ‧ ‧ preliminary forming steps

(S3) ‧‧‧forming steps

(S4) ‧ ‧ combination steps

[Fig. AA] is a schematic view showing the steps of fabricating a semi-finished product in which a plurality of net materials are stacked on each other in the embodiment of the present invention.

[Fig. B] is a schematic view showing the operation of performing thermal cutting in the forming step of the embodiment of the present invention.

[Fig. C] is a schematic view showing the state in which the column (10) is thermally cut into a block (10A) in the forming step of the embodiment of the present invention.

[Second figure] is a block diagram of steps of an embodiment of the present invention.

[Third Figure] is a schematic cross-sectional view of a block (10A) of an embodiment of the present invention.

[Fourth Diagram] is a schematic cross-sectional view of a regenerator of a combined step of an embodiment of the present invention.

[Fifth A] is a schematic view showing the steps of the step of fabricating the metal velvet in the semi-finished part according to the embodiment of the present invention.

[Fig. 5B] is a schematic view showing the operation of performing thermal cutting in the forming step of the embodiment of the present invention.

[Fifth C] is a schematic view showing a state in which the column (20) is thermally cut into a block (20A) in the forming step of the embodiment of the present invention.

Combining the above technical features, the main effects of the regenerator and the manufacturing method thereof of the embodiment of the present invention will be clearly shown in the following embodiments.

Referring to FIG. 1A to FIG. 1C and FIG. 2, a flow chart and a flow block diagram of a method for manufacturing a regenerator according to an embodiment of the present invention are disclosed. The method for manufacturing the regenerator includes the following steps: Semi-finished part manufacturing step (S1): a plurality of net materials (1) are provided, and the above-mentioned net material (1) is stacked to form a column (10). The shape of the aforementioned web (1) is preferably a rectangle to provide two peripherals (11) perpendicular to each other, so that the periphery (11) of each web (1) is aligned with each other when stacked. However, it is not limited to this. It can also be a polygon. The main purpose is to provide a reference for the alignment. The aforementioned mesh material (1) is usually a metal mesh material, such as a stainless steel mesh material.

The preliminary forming step (S2) applies the column (10) to a bonding means, which is a combination of a diffusion welding means, a sintering means, and a resistance welding means. The column (10) is initially fixed. The so-called diffusion welding method is to keep the column (10) at a certain temperature and pressure for a period of time. A method of welding the atoms of the mesh material (1) in contact with each other to form a joint. The sintering means means means that the metal particles of the respective mesh materials (1) are bonded to each other by using a high temperature. The electric resistance welding means is a method in which the column (10) is applied with a pressure through an electrode, and a current is passed through the contact surface between the mesh members (1), and further, welding is performed by generating resistance heat.

Forming step (S3): cutting the column (10) by a thermal cutting means, cutting a piece of material (10A) on the column (10), and forming a column shape by a square cylinder (but not limited thereto) For the sake of illustration only, the respective webs (1) on the block (10A) are melted at the hot cut and bonded to each other. In detail, the thermal cutting means is any one or a combination of a laser cutting means and a heating wire cutting means. Preferably, in the forming step, the permanent perforations (12) penetrating through the ends of the block (10A) are formed by the thermal cutting means such that each web (1) is adjacent to the periphery of the through hole (12). Connect to each other.

Referring to the third figure, each mesh material (1) can be formed with a welded portion (13) at the periphery to be connected to each other, and the block material (10A) is formed with a continuous perforation (12) penetrating through the two ends. Each of the mesh materials (1) is formed with another welded portion (130) adjacent to the through hole, and the other welded portions (130) of each of the foregoing mesh materials (1) are connected to each other.

And referring to the fourth figure, preferably, further comprising a combination step (S4), repeating the semi-finished part manufacturing step and the forming step to provide a plurality of blocks (10A) (10B) (10C) (10D) (10E), the type of each block (10A) (10B) (10C) (10D) (10E) is different from the porosity (for example, each block (10A) (10B) (10C) (10D) (10E) Stacked in a gradient-changing porosity], followed by stacking the aforementioned bulk (10A) (10B) (10C) (10D) (10E). In this way, different types and porosity regenerators can be stacked with different requirements.

Please refer to the fifth to fifth C drawings, which disclose another embodiment of the present invention. The difference from the previous embodiment is mainly that the porous material is changed to a metal velvet (2), and the manufacturing method is similar to the previous one. In the embodiment, the desired block (20A) can be produced by the above-described semi-finished part manufacturing step, the preliminary forming step, and the aforementioned forming step. Further, through the aforementioned combination steps, to pile up with different needs A regenerator of different types and porosity. For the foregoing preliminary forming steps and the detailed technical contents of the foregoing forming steps, please refer to the previous embodiment, which will not be described in detail herein.

It is worth mentioning that in the semi-finished part manufacturing step, a container (3) may be further provided for the metal velvet (2) to be loaded into the container (3) to form a cylinder (20). The container (3) stacks the aforementioned metal velvets (2) into a specific pattern.

However, it should be added that although the above embodiments use the mesh material (1) and the metal velvet (2) respectively, the use of the mesh material (1) and the metal velvet (2) is also one of the feasible ways, for example, in the second network. The metal velvet (2) is disposed between the materials (1), and the mesh material (1) and the metal velvet (2) are also thermally cut through the semi-finished material manufacturing step, the preliminary forming step, and the forming step. Melt and combine with each other to shape.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1)‧‧‧

(10) ‧‧‧Cylinder

(10A) ‧‧‧Block

(11) Around ‧‧

(12)‧‧‧through holes

Claims (8)

A regenerator manufacturing method comprising the steps of: a semi-finished part manufacturing step: forming a porous material into a column shape; forming step: cutting the column by a thermal cutting means to make the porous material be heated The cut is melted and combined to form a piece of material. The method of manufacturing a regenerator according to claim 1, wherein the porous material is any one or a combination of a metal velvet, a plurality of net materials stacked on each other, and a plurality of metal velvets stacked on each other. The method of manufacturing a regenerator according to claim 2, wherein the plurality of net materials have at least two perpendicular sides; and in the semi-finished part manufacturing step, each of the net materials is aligned with each other by the two sides. The regenerator manufacturing method according to claim 2, wherein in the semi-finished product manufacturing step, the metal velvet is placed in a container to shape the metal velvet. The method of manufacturing a regenerator according to claim 1 or 2, wherein a preliminary forming step is provided between the half-finishing step and the forming step, and the column is formed in the preliminary forming step The body is applied by a bonding means, and the bonding means is any one or a combination of a diffusion welding means, a sintering means, and a resistance welding means. The method of manufacturing a regenerator according to claim 1 or 2, wherein the thermal cutting means is any one or a combination of a laser cutting means and a heating wire cutting means. The method of manufacturing a regenerator according to claim 1 or 2, further comprising a combination step of repeating the semi-finished part manufacturing step and the forming step to provide a plurality of blocks, wherein one of the pieces is The species differs from the porosity and the type and porosity of the other block, and then the aforementioned blocks are stacked. The method for manufacturing a regenerator according to claim 1 or 2, wherein in the forming step, the permanent perforation penetrating through the two ends of the column is formed by the thermal cutting means, so that the column is adjacent to the through hole. The perimeters are connected to each other.