JP6229178B2 - Processing method for ring products - Google Patents

Description

  The present invention relates to a method of processing a ring product for manufacturing a non-circular ring (seamless closed loop) formed of a metal material, such as a seal ring used in a butterfly optical communication module. , Processing molds and ring products.

  For example, in a butterfly optical communication module in which electrode terminals used in a communication system are arranged at both ends of a frame, a Kovar seal ring is used to maintain airtightness between a ceramic case and a lid that is a lid thereof. Yes. This Kovar material is a tenacious alloy containing Fe, Ni, and Co, and its thermal expansion coefficient is close to that of ceramic, so that its demand for optical communication related parts and the like is growing rapidly.

  By the way, as a manufacturing process of a Kovar seal ring, wire electric discharge machining has been conventionally used. After cutting an inner peripheral contour and an outer peripheral contour with a wire electric discharge machine from a Kovar thick plate material, end finishing, lapping, barrel Many processes have been adopted in which a finished product is obtained through processing or the like.

  However, the manufacturing process using such wire electric discharge machining has a high process unit cost and a very long processing time. Therefore, a more efficient and low-cost manufacturing method is required, but the product is required. The reality is that in order to meet strict dimensional tolerances, wire electrical discharge machining must be relied upon.

  Further, even if the required precision is not high even with the progressive press processing technology using a thin plate as a raw material, it is possible to cope with it, but the progressive die and the progressive press are very expensive, and the initial investment becomes high. In addition, the processed product has many breaks and cracks, and the quality is low, so that the yield of products satisfying the dimensional tolerance is low.

  In addition, there is a method of using a shearing process using a plate material as a raw material, but there is a problem that a failure occurs due to breakage or sagging on the sheared surface of the processed product. In general, it is said that when a ring product having a ring height of three times or more the ring width (crosspiece width) handled in the present application is used, not only shearing processing but also fine punching such as fine blanking cannot be handled.

  On the other hand, as described in Patent Document 1, as a method of manufacturing a square tube excellent in dimensional accuracy that can be used as an electronic component, a round tube made of Kovar alloy is drawn by cold drawing to obtain a rough angle. After obtaining a pipe, a method of producing a finished square pipe by further drawing has been devised. However, since a plurality of drawing processes and a stress-relieving heat treatment are performed between them, the cost increases and there is a problem in efficiency. Further, according to the study by the present inventors, the method using cold drawing using Kovar alloy as a raw material has a problem in dimensional accuracy, and there is a problem that the efficiency of manufacturing cannot be achieved.

JP 2006-51537 A

  The present invention has been made in view of the above circumstances, and for example, to produce a ring-shaped product other than a circle formed from a metal, such as a seal ring used in a butterfly optical communication module. In addition, it is possible to reduce the cost by minimizing the initial capital investment, and the ring product processing method, the processing die, and the ring that enable highly accurate ring products to be manufactured in a short time and with high efficiency. The purpose is to provide products.

In the ring product processing method according to the first aspect of the present invention, a fixing pin positioned according to the shape of the ring product to be processed is fixed between adjacent movable dies, and the inner peripheral side cylinder of the ring-shaped extension material is fixed. By moving outwardly from the radial center along the slide rail so that only the die forming part of each movable die is in contact with the surface and only the stop pin is in contact with the outer cylindrical surface of the ring-shaped extension material, When extending a ring-shaped stretch material that does not exist, the deformation of the ring-shaped stretch material is adjusted by a stop pin that contacts the outer peripheral side or inner peripheral side of the ring-shaped stretch material, and the inner periphery of the ring product to be processed A method for processing a ring product, characterized in that the length is greater than 100% with respect to the inner peripheral length of the ring-shaped extension material, and an elongation rate is provided until breakage does not occur.

In the ring product processing method according to the second aspect of the present invention, a stop pin positioned in accordance with the shape of the ring product to be processed is fixed between adjacent movable dies, and the outer peripheral cylindrical surface of the ring-shaped extension material is fixed. The ring is seamless by moving it toward the radial center along the slide rail so that only the die forming part of each movable die and only the stop pin contacts the inner peripheral cylindrical surface of the ring-shaped extension material. When extending the ring-shaped extension material, the deformation of the ring-shaped extension material is adjusted by a stop pin that contacts the inner periphery of the ring-shaped extension material, and the inner circumference of the ring product to be processed is A method for processing a ring product, characterized in that an elongation rate greater than 100% with respect to the inner peripheral length of the stretch material and not causing breakage is imparted.

  According to a fourth aspect of the present invention, there is provided a ring product machining method according to the third aspect, wherein each movable die is moved to each slide by increasing or decreasing each inclination angle of a quadrangular pyramid punch as one of the conical surfaces. The machining stroke when moving outward from the radiation center side along the rail is changed.

  According to a fifth aspect of the present invention, there is provided a method for processing a ring product according to the third aspect of the present invention, wherein, as one of the conical surfaces, a square ring is formed by making the inclination angles of all the outer surfaces of the quadrangular pyramid punches the same. The rectangular ring is formed by making the inclination angles of the outer side surfaces adjacent to each other different in the punch and making the inclination angles of the opposite outer side surfaces the same.

  According to a sixth aspect of the present invention, there is provided a method for processing a ring product according to the first or second aspect, wherein the movable die is opposite to the die forming portion using the hydraulic pressure generator, the hydraulic connecting pipe and the pressure cylinder unit. Is pressed in parallel with the movable direction of each slide rail, whereby each movable die is moved outwardly from the radial center along the slide rail or toward the radial center.

  According to a seventh aspect of the present invention, there is provided a ring product machining die according to a shape of a die forming portion of each movable die configured to be movable along a plurality of slide rails having radial tracks. A mold that forms the corner of a product, and a ring-shaped stretch material with no joints that is circumscribed or inscribed in the die forming part of these movable dies is formed in the die forming part of each movable die. By pressing outward or toward the radial center from the radial center side, the ring-shaped extension material is deformed following the shape of the pressing surface of the die forming portion of each movable die.

  According to the present invention, a die forming portion for forming a corner portion of a ring product to be processed is provided on a movable die configured to be movable for each of a plurality of slide rails having a radial track, and these die forming Set a seamless ring-shaped extension material so that it circumscribes or inscribes the part, and moves each movable die from the radial center side outward or toward the radial center along the slide rail. While pressing the molding part radially outward from the inner circumference side of the ring-shaped extension material or toward the radiation center from the outer circumference side, the ring-shaped extension material is deformed following the shape of each die molding part. The inner peripheral length of the ring product to be processed is larger than 100% with respect to the inner peripheral length of the ring-shaped extension material, and an elongation rate is given until it does not break. It is possible to form a ring products processing purposes by the.

Further, according to the present invention, it is possible to process a ring product having a complicated contour shape such as an asymmetric shape by appropriately planning the number and positions of the stop pins.

  Further, according to the present invention, it is possible to process a polygonal ring product as well as a quadrangle by increasing or decreasing the number of slide rails.

  Further, in the present invention, a punch having a conical surface whose lower cross-sectional area is lower than that of the upper portion disposed at the radial center of a plurality of slide rails having a radial track on the opposite side to the die forming portion of the plurality of movable dies. Thus, the movable die can be moved in the radial direction along each slide rail by sequentially contacting the conical surface of the punch and each movable die.

  Further, by increasing or decreasing each inclination angle of the quadrangular pyramid punch as one of the conical surfaces, the machining stroke when moving each movable die outward from the radial center along each slide rail is changed. Therefore, it is possible to adjust the processing time, and it is possible to use the press machine with a low die height.

  Further, as one of the conical surfaces, a square ring is formed by making the inclination angles of all the outer surfaces of the quadrangular pyramid punches the same, and the taper angles of the opposing taper surfaces are made the same between the two opposing surfaces. Since it is possible to form a rectangular ring by making the taper angles of the opposing tapered surfaces different, simply changing the shape of the punch as described above makes the ring product a square ring or a rectangular ring. It is possible to adjust whether or not.

In addition, according to the present invention, it is possible to process a ring product without using a pressing device such as a press machine by using a hydraulic pressure generator, a hydraulic connecting pipe, and a pressure cylinder unit.

  According to the present invention as described above, an inexpensive and seamless metal circular tube manufactured by rolling, drawing, or extruding or the like is cut into a ring at a height that matches the height of the ring product after the ring processing. Minimize initial capital investment because it is possible to form a ring product with a predetermined shape by simply using a cut thin-walled tube extension material and press molding using multiple movable dies and retaining pins. In addition, it is possible to manufacture a highly accurate ring product in a short time and with high efficiency.

It is a perspective view which shows the metal mold | die structure in Example 1 of this invention, a movement of a metal mold | die, and the ring product before and behind a process. It is a top view which shows the processing method of the ring product in Example 1 of this invention, (a) is a top view which shows the state before a deformation | transformation of a ring-shaped extension material, (b) is a ring-shaped extension material. It is a top view which shows the state deform | transformed into the square ring product, (c) is a side view of one movable die of (a) or (b). It is a cross-sectional perspective view which shows the specific example of the metal mold | die set used by the process of the ring product in Example 1 of this invention. (A) is a top view which shows the square ring product formed by the processing method of the ring product in Example 1 of this invention, and a pressurization direction, (b) is a top view which shows a rectangular ring product and a pressurization direction. (C) is a plan view showing a triangular ring product and a pressing direction. It is a perspective view which shows the metal mold | die structure in Example 2 of this invention, the movement of a metal mold | die, and the ring product before and behind a process. (A) is the top view which shows the ring product which has the shape where each side of the square formed by the processing method of the ring product in Example 2 of this invention was dented inward, and a pressurization direction, (b) is a star. It is a top view which shows a ring product of a type | mold, and a pressurization direction, (c) is a top view which shows a heart-shaped ring product and a pressurization direction. (A) And (b) is a top view which shows the structure of the metal mold | die and hydraulic device in Example 3 of this invention, the movement of a metal mold | die, and the ring product before and behind a process. (A) And (b) is a top view which shows the structure of the metal mold | die and hydraulic device in Example 4 of this invention, the movement of a metal mold | die, and the ring product before and behind a process.

  The processing method of the ring product of the present embodiment is applied to the processing method of a seamless ring product having a round shape in which the corners of the four corners form an arc shape, a rectangular ring shape, and a triangular shape. The present invention is also applicable to processing ring products having a ring shape such as a star shape or a heart shape. In addition, embodiment of this invention shows the most preferable form of invention, This invention is not limited to these.

  Further, in the processing method of the ring product of the present embodiment, as a material before processing, a ring-shaped extension material cut into a ring cut at a height that matches the height of the ring product after processing a metal circular pipe is used. However, the extension material is not limited to the circular cross section, and extension materials having other shapes can be used.

  Furthermore, the ring product according to the present embodiment can be applied as a seal ring interposed between the ceramic case of the optical communication module and the lid which is a lid using a Kovar material containing Fe, Ni, and Co. Further, as a use other than the seal ring, it is also applicable as a method for manufacturing various ring products using a metal material different from the Kovar material having extensibility.

  FIGS. 1 and 2 (a) to 2 (c) are diagrams for explaining a mold configuration for molding the square ring 1, movement of the mold, and ring products before and after processing. As shown in these drawings, as a plurality of movable dies, four movable dies 2 are used as a specific example, and each movable die 2 is configured to be movable in the radial direction. Four slide rails 3 having radial guide tracks are provided in the four directions.

  Each slide rail 3 is provided with a movable die 2 configured to be fitted on the slide portion 13 so as to be movable on the rail, and a square ring 1 to be processed is provided on the material side of each movable die 2. A die forming portion 5 for forming the corner portion 6 is formed. As shown in FIG. 2B, the die forming portion 5 is formed in an arc shape that is the same shape as the round shape inside the corner portion 6 of the square ring 1 to be processed. The slide rail 3 may be a T-groove, and the fitting portion 2b may be matched to the shape to prevent the movable die 2 from falling off.

  Therefore, as shown in FIG. 1, the ring-shaped extension 5 (for example, a metal circular tube having an inner diameter of 56 mm, an outer diameter of 58 mm, and a height of 5 mm cut into round pieces) is formed with the four movable dies 2 described above. The material 7 is set so as to come into contact (the state shown in FIG. 2A), and as shown in FIG. 2B, each movable die 2 is moved outward along the slide rail 3 with respect to the radiation center. Thus, when the die forming portion 5 of each movable die 2 is pressed outward from the inner peripheral side against the ring-shaped extension material 7, the four directions of the ring-shaped extension material 7 are extended, so that A rounded corner portion 6 is formed which is deformed following the shape of each die forming portion 5. Further, along with the formation of each corner portion 6 as described above, the straight portions that form the four sides 8 of the square ring 1 are extended by further increasing the distance between the corner portions 6. Here, in the case of a square ring with a side of 55 mm made of Kovar, the elongation rate at the time of extension is springback if the inner peripheral length of the ring product is 114% with respect to the inner peripheral length of the ring-shaped extension material. It does not occur and a good processed product is obtained.

  Further, as described above, the mechanism for moving the movable die 2 outward from the radiation center along the slide rail 3 is formed so that the lower part has a smaller cross-sectional area than the upper part as shown in FIG. The center axis of the taper-shaped punch 9 and the radiation center O are made to coincide with each other. The punch 9 is brought into contact with the round-shaped punch contact surface 2a of the four movable dies 2, and the punch 9 is moved to the small cross-sectional area side of the punch 9 (the contact surface moves to the large cross-sectional area side). By pressing the punch contact surface 2a of each movable die 2 with the outer surface 9a, it is possible to move each movable die 2 in the radial direction along each slide rail 3. For example, in the case of FIG. 1, when the punch 9 is moved in the direction of the arrow (downward), each movable die 2 is moved in the direction of the arrow (outward).

  Here, a specific configuration of the mold set 10 used in the above-described ring product processing method will be described. As shown in FIG. 3, the mold set 10 is provided with four slide rails 3 radially from the center of the fixed side base part 11 installed below, and the slide part 13 is fitted to each slide rail 3. A slide spring 14 is provided at the tip of each slide portion 13 for returning the slide portion 13 to the radial center O side at the end of molding.

  Moreover, the slide part 13 is provided in the lower part of the movable die 2, and as shown in FIG. 1, the corner | angular of the inner peripheral side of the corner part 6 of the square ring 1 which is a process objective is shown in the front-end | tip part of the movable die 2. An arc-shaped die forming portion 5 corresponding to the portion (R shape) is formed.

  Further, the movable side base part 15 and the fixed side base part 11 of the mold set 10 are held at a predetermined interval by a shaft 24 and a movable side spring 12 disposed on the upper part of the fixed side base part 11, and the movable side base part. Drive means (not shown) is provided for moving 15 downward by a pressing device such as a press. The punch holder 16 of the movable side base 15 has a tapered punch 9 formed so that the lower part has a smaller cross-sectional area than the upper part at the center of the four movable dies 2 arranged below the punch holder 16. The punch 9 is mounted and moved toward the center of the four movable dies 2.

  With the mold set 10 thus configured, the ring-shaped extension material 7 is set so as to circumscribe the molding parts 5 of the four movable dies 2 provided on the fixed side base part 11, and the movable side base part is set. By moving 15 downward, the punch 9 is inserted into the space formed between the four movable dies 2. Next, when the amount of movement of the punch 9 is increased, the outer surface 9a of the punch 9 comes into contact with the punch contact surface 2a of each movable die 2, and each movable die 2 is deformed by the elastic force of each slide spring 14 and the deformation of the work material. Moves radially outward against resistance.

  In this manner, as described with reference to FIG. 1, when the die forming portion 5 of each movable die 2 is pressed radially outward from the inner peripheral side of the ring-shaped extension material 7, By extending the four sides, rounded corner portions 6 are formed which are deformed following the shapes of the respective die forming portions 5 on the four sides. Further, along with the formation of each corner portion 6 as described above, each of the sides 8 is extended in a straight line shape by pulling until the inner peripheral length of the ring-shaped extension material 7 made of Kovar becomes about 114%. As shown in (a), a square ring product 1 is formed. Here, as shown in Table 1, even when an elongation of about 104 to 114% is given, in the case of a ring made of Kovar, there is no problem of shape due to springback, and the thickness and height are slightly Although it will be smaller, material dimensions should be planned in anticipation of this.

  In the above-described mold set 10, after the ring product is formed, when the driving force for moving the movable side pedestal 15 downward is released, the movable side pedestal 15 is moved upward by the reaction force of the movable side spring 12. Return to. Accordingly, the four movable dies 2 also return to the radial center O direction by the reaction force of the slide springs 14 to release the restriction on the ring product 1 after molding, so that the ring product 1 is molded. It becomes possible to take out from the set 10 outward.

  A molded product formed by the molding method as described above is formed by pressing the ring-shaped extension material 7 outward from the radial center side by the die molding portions 5 of the four movable dies 2, thereby forming each die molding portion 5. The square ring 1 (see FIG. 4A) having the rounded corner portion 6 deformed following the above is obtained.

  Further, the rectangular ring 18 having the rectangular ring shape shown in FIG. 4B, and the triangular ring 19 having the triangular ring shape shown in FIG. 4C are the movable die 2 shown in FIG. Processing can be performed by changing the arrangement and number of the slide rails 3 or the shape of the die forming portion 5 of the movable die 2. At that time, by the same method as the square ring 1 described above, as indicated by an arrow A in FIGS. By pressing radially outward from the side, rounded corner portions 6 deformed following the shape of each die forming portion 5 are formed. Simultaneously with the deformation of each corner portion 6, each side 8 extends into a straight shape by pulling until the inner circumference of the ring-shaped extension material 7 becomes about 114% (in the case of an extension material made of Kovar). Will be.

  Further, according to the processing method of the present embodiment, by increasing or decreasing the number of slide rails 3, in addition to the square ring 1 and the triangular ring 19, the processing of a polygonal ring product of pentagon or more can be performed. It becomes.

  Further, in the structure in which each movable die 2 is moved using the tapered punch 9 described above, each movable die 2 is moved to each slide by increasing or decreasing the inclination angles α and β of the punch 9 shown in FIG. It is possible to change the machining stroke when moving in the radial direction along the rail 4.

  Furthermore, the square ring 1 can be formed by making the inclination angle α and the inclination angle β of the adjacent outer surface 9a of the tapered punch 9 the same. Further, since the rectangular ring 18 can be formed by making the inclination angle α and the inclination angle β of the outer surface 9 a adjacent to each other in the taper-shaped punch 9 different, only the shape of the punch 9 is changed. Thus, it is possible to adjust whether the shape of the ring product is the square ring 1 or the rectangular ring 18.

  In this embodiment, as shown in FIG. 5, a method of processing a ring product in which an intermediate portion of each corner portion 6 of the ring product is bent and deformed by a stop pin 17 fixed between the movable dies 2 is shown. . In the perspective view shown in FIG. 5, in the middle of processing of the square ring 1 shown in FIG. 1, a concave shape 20 that forms two sides of a triangle is formed on each side 8 by a stop pin 17. Also in such a processing method, as shown in FIG. 5, four movable dies 2 are arranged, and each movable die 2 is configured to be movable radially outward along the slide rail 3. Each movable die 2 has a structure in which a die forming portion 5 for forming a corner portion 6 is formed.

  Furthermore, in this embodiment, in order to form the inwardly recessed shape 20 on each side 8 of the ring product 21 shown in FIG. When the movable dies 2 are moved radially outward along the respective slide rails 3, each side 8 is stopped by the stop pin 17 so that the deformation movement is stopped. An indented shape 20 is formed.

  According to the method using such a stop pin 17, it becomes possible to process ring products having various shapes as shown in FIGS. In addition, the shape of the site | part where the stop pin 17 contacts a workpiece material depends on the shape of each ring product.

  That is, the ring shape shown in FIG. 6A is a ring product 21 formed by the processing method shown in FIG. In the ring product 21 having this shape, each corner portion 6 is extended from the inner peripheral side of the ring-shaped extension material 7 by moving the die forming portion 5 of the movable die 2 radially outwardly as indicated by an arrow A. As a result, a corner portion 6 deformed following the shape of each die forming portion 5 is formed, and each side 8 of the ring-shaped extension material 7 is stopped by the stop pin 17 so that the deformation movement is stopped. A concave shape 20 having two sides of a triangle is formed between two.

  The ring shape shown in FIG. 6B is a ring-shaped extension by moving the die forming portion 5 of the movable die 2 moving in five directions from the radial center side in the radial direction indicated by the arrow A. The five corner portions 6 are extended from the inner peripheral side of the material 7 to form the corner portions 6 that are deformed according to the shape of each die forming portion 5. Simultaneously with this deformation, the star-shaped ring shape 22 can be formed by stopping the deformation movement with the five stop pins 17 arranged on each side 8 of the ring-shaped extension material 7. .

  Furthermore, the ring shape shown in FIG. 6C forms a heart-shaped ring shape 23 in which the lower end of the heart shape is twisted to the left of the paper surface by applying the various processing methods described above. It is what I did. When processing a ring product having such a shape, a plurality of die forming portions 5 arranged on the inner peripheral side of the ring-shaped extension material 7 are die forming portions having an arc-shaped pressing surface inside the ring shape which is a forming purpose. 5 or an acute angle die forming portion 5 is combined, and a stop pin 17 having an arc shape or an acute angle stop pin 17 is arranged on the outer peripheral side of the ring-shaped extension material 7 according to the ring shape to be formed. By doing so, each die forming portion 5 can be formed by moving radially outward and restricting deformation at a predetermined location from the outer peripheral side of the ring-shaped extension material 7 with a stop pin 17.

  Therefore, according to the processing method of the ring product of the second embodiment, the shape and position of the die forming portion 5 disposed on the inner peripheral side of the ring-shaped extension material 7 and the shape and position of the retaining pin 17 are adjusted. Thus, ring products having various shapes can be formed.

  In the present embodiment, the movable dies 2 are moved outward from the radial center O along the slide rails 3 inside the ring-shaped extension material 7, and the pressure cylinder unit 25 having a hydraulic structure is formed. Is used to press the inner peripheral side of the ring-shaped extension material 7 outwardly from the radial center O side by the die forming portion 5 of each movable die 2.

  That is, in this embodiment, as shown in FIG. 7A, each movable die 2 is configured to move outward from the radiation center O side along each slide rail 3, and the radiation center O of each movable die 2. The pressure cylinder unit 25 is arranged on the side. The pressure cylinder unit 25 has four pistons 26 arranged in parallel to the movable direction of the slide rails 3 at the center of the movable die 2 on the opposite side 2b of the die forming portion 5 and at the center. A hydraulic case 27 is provided, and oil is fed from the hydraulic pressure generator 28 to the hydraulic case 27 via the hydraulic connection pipe 29, thereby pressing the opposite side 2b of the die forming portion 5 outwardly by the four pistons 26. I am doing so.

  With this structure, as shown in FIG. 7 (a), when the die forming portion 5 of each movable die 2 is pressed outward from the radial center side against the ring-shaped extension material 7, FIG. 7 (b) As shown in FIG. 4, rounded corner portions 6 are formed which are deformed following the shapes of the respective die forming portions 5 on the four sides, and the distance between the corner portions 6 is further increased, so that the four sides of the square ring are As a result of the extension of the straight line portion 8, the square ring 1 is formed.

  Further, in this embodiment, each movable die 2 is moved along the slide rail 3 toward the radial center O outside the ring-shaped extension material 7, and the pressurizing cylinder unit 30 having a hydraulic structure is provided. In this case, the outer peripheral side of the ring-shaped extension material 7 is pressed toward the radial center O by the die forming portion 5 of each movable die 2.

  That is, in the present embodiment, as shown in FIG. 8A, each movable die 2 is moved along the slide rail 3 toward the radial center O, and a pressure cylinder unit is provided for each movable die 2. 30 is arranged. The pressurizing cylinder unit 30 includes four pistons 31 that are parallel to the movable direction of the slide rails 3 on the opposite side 2b of the movable dies 2 from the die forming portion 5, and each piston 31 has a hydraulic case. 32 is provided, and oil is fed from the hydraulic pressure generator 33 to the hydraulic case 32 via the hydraulic connection pipe 34, so that the four pistons 31 press the opposite side 2b of the die forming portion 5 toward the radial center. I am doing so.

  With this structure, as shown in FIG. 8 (a), a stop pin 17 is provided inside the ring-shaped extension material 7 at the center between the die forming portions 5 of each movable die 2, and each movable die. When the die forming part 5 of 2 is pressed from the outside of the ring-shaped extension material 7 toward the radial center O, as shown in FIG. Part 6 is formed. Further, by expanding the distance between the corner portions 6, the space between the die forming portions 5 of each movable die 2 is extended, and as a result, a ring product 21 having a shape in which a concave shape 20 is formed on each side 8 of the square ring. Is formed.

  The present invention is low cost by minimizing initial capital investment to produce ring-shaped products made of metal, such as seal rings used in butterfly type optical communication modules. In addition, the present invention can be used as a ring product processing method, a processing mold, and a ring product in which a highly accurate ring product is manufactured in a short time and with high efficiency.

DESCRIPTION OF SYMBOLS 1 Square ring 2 Movable die 2a Punch contact surface 2b of movable die 2 Opposite to the die forming part 3 Slide rail 4 Base die 5 Die forming part 6 Corner part 7 Ring-shaped extension material 8 Each side 9 Punch 9a Outside the punch Side surface 10 Mold set 11 Fixed side base part 12 Movable side spring 13 Slide part 14 Slide spring 15 Movable side base part 16 Punch holder 17 Stop pin 18 Rectangular ring 19 Triangular ring 20 Concave shape 21 Concave shape on each side of square ring Ring product 22 Star-shaped ring shape 23 Heart-shaped ring shape 24 Shaft 25, 30 Pressure cylinder unit 26, 31 Piston 27, 32 Hydraulic case 28, 33 Hydraulic generator 29, 34 Hydraulic connecting pipe A Arrow α, β Punch Inclination angle O of the outer surface of the center O Radiation center P Center axis of the punch

Claims (2)

A fixing pin positioned according to the shape of the ring product to be processed is fixed between adjacent movable dies, and only the die forming part of each movable die is attached to the inner peripheral side cylindrical surface of the ring-shaped extension material. When extending a seamless ring-shaped extension material by moving it outward from the radial center along the slide rail so that only the stop pin contacts the outer cylindrical surface of the cylindrical extension material, this ring shape The deformation of the ring-shaped extension material is adjusted by a stop pin that contacts the outer peripheral side of the extension material, and the inner peripheral length of the ring product for processing is larger than 100% of the inner peripheral length of the ring-shaped extension material. And the processing method of the ring product characterized by giving the elongation rate until it does not lead to a fracture | rupture. A fixing pin positioned according to the shape of the ring product to be processed is fixed between adjacent movable dies, and only the die forming part of each movable die is attached to the outer cylindrical surface of the ring-shaped extension material. When extending a seamless ring-shaped extension material by moving it toward the radiation center along the slide rail so that only the stop pin contacts the inner peripheral cylindrical surface of the extension material, this ring-shaped extension While adjusting the deformation of the ring-shaped extension material with a stop pin that contacts the inner periphery of the material, the inner circumference of the ring product for processing is greater than 100% of the inner circumference of the ring-shaped extension material, And the processing method of the ring product characterized by giving elongation until it does not lead to a fracture | rupture.