JP6136280B2 - Press apparatus, press mold used for the press apparatus, and press method - Google Patents

Description

  The present invention is a press suitably used for caulking or the like that plastically deforms a workpiece (hereinafter referred to as a “work”) such as a round pipe or a round bar into a polygon (square press, hexagon press, etc.) in cross section. Regarding technology.

  In the press working method for producing a product having a square cross section from a work such as a round pipe or a round bar, as shown in FIG. 4, a work W is set between a pair of dies 111 and 112 facing in the vertical direction or the horizontal direction. (FIG. 4 (a)), the molds 111 and 112 are moved in the directions of arrows 114 and 115, respectively, to pressurize the workpiece W from two directions (FIG. 4 (b)), and are plastically deformed to show a sectional view. It is molded into a rectangular product 113 (FIG. 4C).

  According to this press working method, as shown in FIG. 4, there is a difference (angle difference) between the pressing direction (moving direction of the molds 111 and 112) and the deformation direction of the workpiece W, and the pressing of the molds 111 and 112 is performed. "Slip" occurs at each contact surface between the surfaces (141, 142, 143, 144) and the workpiece W, and the appearance surface of the obtained product 113 is scratched, the surface roughness is deteriorated, the mold 111, 112 was consumed. In particular, due to the characteristics of the product 113, when the lubricating oil or the like cannot be used, the deterioration of surface roughness increases and the product yield decreases, or when the product 113 requires aesthetic appearance, the surface roughness decreases. Was a fatal drawback.

  On the other hand, a press device has been proposed in which a cylindrical member externally fitted to an electric wire is caulked and fixed in a hexagonal shape in an end view with a mold (see, for example, Patent Document 1). In this press apparatus, the mold is divided into six molds that individually mold each hexagonal surface, and each divided mold is set to move in a direction perpendicular to the molding surface of the cylindrical member. Yes. In other words, according to this press apparatus, the split molds dedicated to each surface are moved and pressed from the periphery of each surface toward the center of the cylindrical member, and the occurrence of the “slip” can be prevented. The number of necessary molds increases, the direction of pressurization increases, and the size and cost of the apparatus cannot be avoided. In addition, it must be adjusted and controlled so that the press pressure of each split mold is constant, but since the movement direction of each split mold is different, it becomes difficult to apply a uniform press pressure to the work piece. There is also a problem that the accuracy of the cross-sectional shape and the like is difficult to be obtained.

JP 2002-233918 A (FIGS. 1 and 2)

  Therefore, in view of the above-mentioned situation, the present invention is intended to solve the problem that it is possible to obtain a product having a good appearance surface that does not deteriorate surface roughness after press molding, and to prevent the mold from being consumed, It is an object of the present invention to provide a press device that can avoid an increase in size and cost of the device, and a press die and a press method used therefor.

  As a result of diligent study in view of the present situation, the present inventor has made it possible to move a portion having a die press surface that strikes the workpiece obliquely relative to the die body, and the press surface moves integrally with the deformed workpiece. By configuring so that it is possible to prevent the equipment from becoming large and costly, it is possible to prevent "slip" at the contact surface between the mold and the workpiece, and to improve the surface roughness of the workpiece after molding. In addition, the present inventors have found that the mold can be prevented from being consumed and the present invention has been completed.

  That is, the present invention is a press device that pressurizes and deforms a workpiece with a mold, and a portion having a press surface that obliquely hits the workpiece of the mold is configured to be movable relative to the mold body, As the mold moves, the part having the pressing surface moves integrally with the workpiece deformed along the normal direction of the pressing surface without moving relative to the workpiece in the sliding direction parallel to the pressing surface. The press apparatus characterized by these was constructed. Here, “striking” means a case where the normal direction of the press surface has an angle with respect to the moving direction of the mold (mold body).

  Here, the part having the press surface is provided in a single or plural pairs at positions symmetrical with respect to the center line along the moving direction of the mold, and each part can be moved relative to the mold body. What is formed is preferable.

  In addition, a portion having a press surface substantially parallel to the press surface at a position symmetrical to a portion having the press surface of the other die and the center of the workpiece, which is composed of a pair of molds facing each other. It is preferable that it is provided and the part is configured to be relatively movable with respect to the mold body of the mold.

  More specifically, the portion having the pressing surface is constituted by a sliding mold having the pressing surface and a sliding surface that slides with respect to the mold body, and the mold moves as the mold moves. When the sliding mold moves relative to the mold body, it is integrated with the workpiece that deforms along the normal direction of the press surface without moving relative to the workpiece in a sliding direction parallel to the press surface. Are preferred.

  Further, the present invention is a press mold used in the above-mentioned press device, wherein a part having a press surface that strikes a work obliquely is configured to be movable relative to the mold body, and the above-mentioned is accompanied with the movement of the mold. There is also provided a press mold in which a portion having a press surface moves integrally with a workpiece deformed along a normal direction of the press surface without moving relative to the workpiece in a sliding direction parallel to the press surface.

  Further, the present invention is a pressing method for pressurizing and deforming a workpiece with a mold, wherein a portion having a press surface that strikes the workpiece of the mold obliquely is configured to be relatively movable with respect to the mold body, When the press surface comes into contact with the workpiece, the portion having the press surface moves relative to the die body as the mold moves, so that the workpiece moves in a sliding direction parallel to the press surface. There is also provided a pressing method characterized by moving together with a workpiece that deforms along the normal direction of the pressing surface without relative movement.

  According to the present invention as described above, at the time of pressing, a portion having a press surface that strikes the workpiece of the mold obliquely moves relative to the die body, and relative to the workpiece in a sliding direction parallel to the press surface. Since it is configured to move integrally with the workpiece deformed along the normal direction of the press surface without moving, by changing only the mold to the mold having the above-described configuration in the conventional press machine , "Slip" on the contact surface between the mold and the workpiece can be prevented, the surface roughness of the molded workpiece, that is, the product can be improved, and a product having a good appearance surface can be obtained. Can also be prevented. Further, since it is not necessary to add an extra device or divide a mold, it is possible to avoid an increase in size and cost of the device.

  Further, the part having the press surface is provided in a single or plural pairs at positions symmetrical with respect to the center line along the moving direction of the mold, and each part is configured to be relatively movable with respect to the mold body. As a result, the pressurizing force acting on the mold is evenly distributed to the press surfaces of the respective parts, so that the workpiece can be accurately and obliquely deformed with a balanced pressurizing force. As a result, deterioration of the surface roughness is further suppressed, a product having a better appearance surface, good dimensional accuracy and shape accuracy can be obtained, and wear of the mold is further prevented.

  In addition, a portion having a press surface substantially parallel to the press surface at a position symmetrical to a portion having the press surface of the other die and the center of the workpiece, which is composed of a pair of molds facing each other. Since this part is also configured to be relatively movable with respect to the mold body of the mold, square caulking, hexagonal caulking, etc. can be carried out with high accuracy, and the workpiece is substantially normal in cross-sectional view. It can be efficiently processed into a square product.

  Further, the portion having the press surface is constituted by a sliding mold having the pressing surface and a sliding surface that slides with respect to the mold body, and the sliding mold as the mold moves. Since it moves relative to the mold body, it moves together with the workpiece deformed along the normal direction of the press surface without moving relative to the workpiece in the sliding direction parallel to the press surface. In addition to preventing the mold from being worn out, even if the mold is somewhat worn out, recovery can be completed simply by changing the thickness of the sliding mold, eliminating the need to adjust the mold body . As a result, the maintenance of the mold is simplified and facilitated, and the period until the mold is replaced with a new mold becomes very long, so that the manufacturing cost can be greatly reduced.

It is a schematic diagram explaining 1st Embodiment of the press apparatus of this invention. It is a schematic diagram explaining 2nd Embodiment of the press apparatus of this invention. It is a schematic diagram explaining 3rd Embodiment of the press apparatus of this invention. It is a schematic diagram explaining the conventional press work method.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, based on FIG. 1, 1st Embodiment of the press apparatus and press method of this invention is described. FIG. 1 is a cross-sectional view schematically showing a configuration of a main part of the press device according to the first embodiment.
As shown in FIG. 1, the press device of the first embodiment uses a press die 1 composed of a pair of opposed molds 11 and 12 to press and plastically deform a workpiece W of a round pipe, This is a press working device that forms a substantially rectangular shape. In FIG. 1, the illustration of the configuration other than the press die 1 is omitted. Moreover, let the left-right direction in the paper surface of FIGS. 1-4 be a width direction.

  The press apparatus of this embodiment is characterized by including a press mold 1 as a mold, and the other structure may be the same as that of a conventional press apparatus. In particular, when processing a long pipe or the like, the structure of the press apparatus described in JP 2011-88166 A is preferable. In addition, for example, a press mold 1 including a pair of molds 11 and 12, a ram having the mold 11 fixed to the lower surface, a bolster disposed opposite to the ram and having the mold 12 fixed to the upper surface, and a ram And a slider that moves up and down by a press pressure, a slide guide that guides the vertical movement of the slider, a press machine that generates the press pressure, and a transmission means that transmits the press pressure generated from the press machine to the slider. It can be constituted as follows. The bolster may be configured to be fixed or configured to be movable up and down.

  Here, as the press machine, any conventionally known press machine can be adopted, and examples thereof include a mechanical type (crank, link motion, cam, screw type, etc.), hydraulic type, pneumatic type, foot press, hand press and the like. It is done. Moreover, press machines, such as C type and a portal type | mold, may be sufficient.

  As shown in FIG. 1, the dies 11 and 12 constituting the press die 1 are made of a material harder than the workpiece W. In the present embodiment, the molds 11 and 12 are arranged vertically in the vertical direction, but may be arranged horizontally in the horizontal direction. The molds 11 and 12 include mold main bodies 21 and 22, respectively.

  The lower surface 11a (upper surface 12a) of the mold 11 (12) has a substantially isosceles triangular cross-sectional view in which the width dimension gradually expands downward (upward) at the center in the width direction of the mold 11 (12). An internal space 21b (22b) which is a concave portion and is a work storage space in which the work W is set is formed. The surface of the mold 11 (12) facing the inner space 21b (22b) downward (upward) (two tapered inclined surfaces forming the inner surface of the recess) constitutes the press surfaces 41 and 42 (43, 44). Yes. When the workpiece W is set in the internal space 21b (22b), the die 11 is lowered, and the die 12 is raised, the press surfaces 41, 42, 43, and 44 are slanted with respect to the workpiece W, and the sectional view is omitted. It becomes the press surface which forms each of the quadrilateral four surfaces.

  The parts having the press surfaces 41, 42, 43, 44 of the molds 11, 12 are configured to be movable relative to the mold bodies 21, 22. Thus, as the molds 11 and 12 move, the workpiece deforms along each normal direction without moving relative to the workpiece W in the sliding direction parallel to the press surfaces 41, 42, 43, and 44, respectively. Move together with W. As a result, the surface roughness of the substantially rectangular product 17 in cross section is improved, the product 17 having a good appearance surface is obtained, and the wear of the press surfaces 41, 42, 43, 44 of the dies 11, 12 is also suppressed. it can. As a result, the yield rate of the product 17 is improved, the maintenance of the molds 11 and 12 is simplified and simplified, and the manufacturing cost of the product 17 is significantly reduced.

  More specifically, the press mold 1 is composed of molds 11 and 12, and the mold 11 (12) is composed of a mold body 21 (22) and sliding molds 31, 32 (33, 34). Composed.

  As shown in FIG. 1A, the sliding molds 31, 32 (33, 34) are arranged so as to be positioned between the mold body 21 (22) and the workpiece W, and are oblique to the workpiece W. Surfaces that correspond to the pressing surfaces 41 and 42 (43, 44), respectively, and sliding surfaces 51, 52 (53, 53) on the opposite side of the thickness direction slide (moves) relative to the mold body 21 (22). 54). The press surfaces 41, 42 (43, 44) and the sliding surfaces 51, 52 (53, 54) are all formed flat in this embodiment. Here, the sliding molds 31 and 32 (33 and 34) are portions having the press surfaces 41 and 42 (43 and 44).

  The sliding molds 31 and 32 (33 and 34) are made of a harder material than the mold body 21 (22) rather than the relatively soft workpiece W to be deformed, and the frictional force between the sliding molds 31 and 32 (33 and 34). Becomes larger than the frictional force between the mold body 21 and the mold body 21. Thus, the sliding dies 31, 32 (33, 34) can be moved in a direction substantially parallel to the pressing surfaces 41, 42 (43, 44) with respect to the die body 21 (22) without releasing the pressing force. The relative movement can be ensured, and the workpiece W can be reliably moved integrally. The mold body 21 (22) is formed with parallel sliding guide surfaces 61, 62 (63, 64) for slidingly guiding the sliding surfaces 51, 52 (53, 54).

  The sliding molds 31, 32 (33, 34) and the mold main body 21 (22) may be slidably engaged with each other, for example. Further, a lubricant is interposed between the mold body 21 (22) and the sliding surfaces 51, 52 (53, 54) of the sliding molds 31, 32 (33, 34), and the frictional force between them. May be reduced. As the lubricant, any of those used in this technical field can be used. For example, dry lubricants such as boron, wet lubricants, and the like are preferable. As a result, even when the workpiece W is slippery, the mold body 21 (22) side can reliably move relative to each other, and it is possible to eliminate the “slip” between the workpiece W and the sliding die 21 (22), thereby improving the surface roughness. Can be made.

  The sliding molds 31 and 32 are provided at positions symmetrical with respect to the center line along the moving direction of the mold 11, and the sliding molds 33 and 34 are similarly arranged at the center line along the moving direction of the mold 12. It is preferable that they are provided at symmetrical positions. Further, the pressing surface 41 of the sliding mold 31 and the pressing surface 44 of the sliding mold 34 and the pressing surface 42 of the sliding mold 32 and the pressing surface 43 of the sliding mold 33 are arranged substantially parallel to each other. It is preferred that By adopting such a configuration, the applied pressure applied to the workpiece W from the sliding dies 31, 32, 33, 34 becomes substantially uniform, has high dimensional accuracy and shape accuracy, and has a sectional view. The product 17 having a substantially regular polygon can be easily obtained.

  In the sliding mold 31 (32, 33, 34), it is preferable that the press surface 41 (42, 43, 44) and the sliding surface 51 (52, 53, 54) are substantially parallel. Thereby, relative movement in the sliding direction parallel to the press surface 41 (42, 43, 44) with respect to the workpiece W of the sliding mold 31 (32, 33, 34) accompanying the movement of the mold body 21, 22 is performed. The sliding mold 31 (32, 33, 34) is moved with the workpiece W deforming along the normal direction of the press surface 41 (42, 43, 44).

  Further, the sliding mold 31 (32, 33, 34) is assumed to have been subjected to a composite material or surface treatment (spraying, etc.), and the press surface 41 (42, 43, 44) side is used as a material constituting the workpiece W. On the other hand, it is also possible to use a material having a high friction coefficient and to make the sliding surface 51 (52, 53, 54) side from a material having a low friction coefficient with respect to the mold body 21 (22). Thereby, relative movement in the sliding direction parallel to the press surface 41 (42, 43, 44) with respect to the workpiece W is reliably suppressed.

  In order to obtain the product 17 having a substantially square shape in cross-sectional view with high dimensional accuracy and shape accuracy, the press surfaces 41, 42, 43, 44 are arranged at positions symmetrical to the center of the workpiece W. Further, it is more preferable that the pressing surfaces 41 and 44 and the pressing surfaces 42 and 43 that face each other are set to be substantially parallel.

  In addition, an inclination angle (hereinafter referred to as “inclination angle of the press surface”) with respect to the direction of movement of the mold main body (vertical direction in the present embodiment) in the normal direction of the press surfaces 41, 42, 43, and 44 is appropriately determined. By selecting, it is possible to change the cross-sectional view shape and dimensions of the product 17 to be obtained, and to obtain a product 17 having good shape accuracy and dimensional accuracy. In the present embodiment, the inclination angles of the press surfaces 41, 42, 43, and 44 are all 45 degrees, but the present invention is not limited to this. For example, the inclination of the adjacent press surfaces 41 and 42 (43, 44) The angle may be 30 degrees on one side and 60 degrees on the other side, and the press surfaces 41, 42, 43, and 44 may have different inclination angles.

  In addition, since only the maintenance of the sliding guide surfaces 61 and 62 (63 and 64) is sufficient for the mold body 21 (22), the maintenance can be facilitated and simplified. Furthermore, since the slide guide surfaces 61 and 62 (63 and 64) are less consumed, the molds 11 and 12 that can be press-molded can be configured only by replacing the slide dies 31 and 32 (33 and 34). The period until the molds 11 and 12 are newly produced becomes very long, and the product yield is increased, and the manufacturing cost of the product 17 can be reduced.

The press apparatus according to the present embodiment is configured to form the outer shape of a substantially square in a sectional view over a part or the entire length of the workpiece W using the molds 11 and 12. Specifically, the press method using the press apparatus of this embodiment is as follows.
First, in the step shown in FIG. 1A, the workpiece W is set in the internal spaces 21b and 22b, which are workpiece storage spaces of the mold main bodies 21 and 22, respectively.

  Next, in the step shown in FIG. 1B, the mold body 21 is lowered in the direction of the arrow 81, the mold body 22 is raised in the direction of the arrow 82, and the press pressure is applied to the workpiece W from two directions. To load. The mold body 21 (22) and the sliding molds 31, 32 (33, 34) slide as the press proceeds. That is, the sliding dies 31, 32 (33, 34) move relative to the die body 21 (22), thereby pressing the press surfaces 41, 42 (43, 44) against the workpiece W that is being deformed. Without moving relative to each other in a sliding direction parallel to the workpiece W, the workpiece W moves integrally with the deformed workpiece W along the normal direction of the press surface.

  More specifically, as the press progresses, the contact area between the workpiece W and the sliding molds 31, 32 (33, 34) increases, but the workpiece W and the sliding molds 31, 32 (33, 34). The contact points 71, 72 (73, 74) from the beginning do not slide in the direction parallel to the press surfaces 41, 42 (43, 44), and are maintained in the same contact state as the first. Therefore, the dimensional accuracy, the shape accuracy, and the like are improved, and the pressure energy required for forming the workpiece W can be efficiently transmitted to the workpiece W without loss. As a result, the surface roughness of the appearance surface of the product 17 finally obtained is improved, and the product yield is significantly increased.

  Similarly, since “slip” does not occur, the wear of the mold body 21 (22) is very small, and even when the mold body 21 (22) is worn, the sliding molds 31, 32 (33, 34) are used. ) Can be restored only by changing the thickness of the mold body 21 (22), so that the maintenance of the mold body 21 (22) becomes unnecessary, and the maintenance of the molds 11 and 12 as a whole is simplified and simplified. Is achieved.

  Finally, in the step shown in FIG. 1C, the press molding is finished, and a product 17 in which the appearance of the appearance surface is improved is obtained. At that time, although not shown, when the press molding is completed and the molds 11 and 12 are opened, the sliding molds 31, 32, 33, and 34 are automatically returned to their initial positions before the press molding by a spring or the like. It is preferable in terms of work efficiency.

  The method for pressing a substantially square in a cross-sectional view using the pressing device of the present embodiment is suitable for application to, for example, forming a spanner hanging portion of a cylindrical main body of a temperature sensor proposed in Utility Model Registration No. 3108736. It is. Moreover, it is suitable also for performing square caulking etc. as an outer shape aperture | diaphragm | restriction of the relay sleeve in the sheath cable connection structure proposed by Unexamined-Japanese-Patent No. 2011-11501.

  In the present embodiment, the press surfaces 41, 42, 43, and 44 are flat surfaces, but are not limited thereto. In particular, when applied to the square caulking of the relay sleeve, it is also preferable that the press surfaces 41, 42, 43, 44 be convex curved surfaces. Thereby, the packing density of insulating materials, such as an internal magnesia, can be aimed at. Further, it is also preferable that the press surfaces 41, 42, 43, and 44 have rough surfaces to increase the frictional force.

  Next, based on FIG. 2, the press apparatus and press method of 2nd Embodiment of this invention are demonstrated. FIG. 2 is a cross-sectional view schematically illustrating a configuration of a main part of the press device according to the second embodiment.

  The press apparatus of the second embodiment uses the press mold 2 composed of the molds 13 and 14, and presses the workpiece W into a product 18 having a substantially regular hexagonal shape in cross-section. The same configuration can be adopted. The press apparatus of this embodiment includes a mold 13 including a mold body 23 and two sliding molds 35 and 36, and a mold body 24 and two sliding molds 37 and 38. By using the mold 14 and changing the shape of the internal spaces 23b, 24b of the mold main bodies 23, 24 and the arrangement positions of the sliding molds 35, 36, 37, 38 in the internal spaces 23b, 24b, W can be formed into a product 18 having a substantially regular hexagonal cross-sectional view.

  As shown in FIG. 2A, the dies 13 and 14 constituting the press die 2 are made of a material harder than the workpiece W. The mold 13 (14) includes a mold body 23 (24) and sliding molds 35 and 36 (37, 38). The mold body 23 (24) and the sliding molds 35, 36 (37, 38) are, for example, slidably engaged with each other.

  On the lower surface 23a (upper surface 24a) side of the mold body 23 (24), there is a recess having a substantially isosceles trapezoidal shape (substantially reverse isosceles trapezoidal shape) in cross section, and the mold body on the lower surface 23a (upper surface 24a). An internal space 23b (24b) having a convex portion 23c (24c) having a substantially rectangular shape in cross-section projecting downward (upward) is formed at the center in the width direction of 23 (24). The width dimension and height dimension of the convex portion 23c (24c) are set to be smaller than the width dimension of the bottom surface of the internal space 23b (24b) and the depth dimension of the internal space 23b (24b), respectively. The slopes of the internal space 23b (24b) corresponding to the isosceles trapezoidal legs are the sliding guide surfaces 65, 66 (67, 68) of the sliding molds 35, 36 (37, 38). With such an arrangement, a space 23d in which the sliding molds 35, 36 (37, 38) can move between the convex portion 23c (24c) and the sliding guide surfaces 65, 66 (67, 68), 23e (24d, 24e) is formed.

  When the workpiece W is set in the workpiece storage space formed by the internal spaces 23b and 24b, the sliding molds 35 and 36 (37 and 38) are connected to the workpiece W and the sliding guide surfaces 65 and 66 (67 and 68). Between the mold body 23 and the mold body 23 (24). The facing surfaces of the sliding dies 35, 36 (37, 38) to the workpiece W are press surfaces 45, 46 (47, 48), and the press surfaces 45, 46 (47, 48) are configured as flat surfaces. Opposing surfaces to the sliding guide surfaces 65 and 66 (67 and 68) are sliding surfaces 55 and 56 (57 and 58). In the present embodiment, the sliding dies 35 and 36 (37 and 38) are arranged so that the inclination angle of the press surfaces 45 and 46 (47 and 48) is 60 °.

  In the present embodiment, the top surface of the convex portion 23c (24c) formed on the lower surface 23a (upper surface 24a) of the mold body 23 (24) presses the upper portion (lower portion) of the workpiece W. ). The press surface 90 (91) is not configured to be movable relative to the mold body 23 (24). However, the workpiece W is sandwiched by the press surfaces 45 and 46 (47 and 48) of the sliding molds 35 and 36 (37 and 38) so as not to move in the horizontal direction (width direction), and the sliding mold 35 is used. 36 (37, 38), the deformation direction of the upper part (lower part) of the workpiece W and the normal direction of the press surface 90 (91) coincide with the movement along the sliding guide surfaces 65, 66 (67, 68). Therefore, relative movement in the sliding direction parallel to the press surface 90 (91) does not occur between the upper portion (lower portion) of the workpiece W and the press surface 90 (91). For this reason, the press surfaces 45, 46, 47, 48, 90, 91 move integrally with the workpiece W deforming along these normal directions, and the six surfaces of the product 18 in a substantially regular hexagonal shape in a sectional view. It is a press surface which forms each. In the present embodiment, by using only the four sliding molds 35, 36, 37, and 38, a beautiful product 18 having a substantially regular hexagonal shape in cross section and a good surface roughness is obtained.

  In the pressing method of this embodiment, after setting the workpiece W in the workpiece storage space of the press die 2 as shown in FIG. 2A, the die 13 is moved to the arrow 81 as shown in FIG. 2B. And the mold 14 is raised in the direction of the arrow 82 to pressurize the workpiece W from two directions. At this time, the sliding molds 35, 36 (37, 38) are contact points 71, 72, where the press surfaces 45, 46 (47, 48) and the workpiece W first contact with each other according to the progress of pressurization. While maintaining the contact at 73 and 74, the spaces 23d and 23e (24d, 24d) between the convex portions 23c (24c) in the internal space 23b (24b) and the sliding guide surfaces 65 and 66 (67 and 68) are maintained. 24e) on the sliding guide surfaces 65, 66 (67, 68). The press surface 90 (91) also moves in the direction of the arrow 81 (82) while maintaining the initial contact state with the workpiece W, and presses the workpiece W.

  Finally, as shown in FIG. 2 (c), the tip portions in the moving direction of the sliding dies 35, 36, 37, and 38 move into the spaces 23d, 23e, 24d, and 24e, respectively, and the workpiece W Press molding is completed. As a result, a product 18 having a substantially regular hexagonal shape in sectional view is obtained.

  As described above, according to the present embodiment, the surface roughness of the outer surface of the product 18 is improved, the dimensional accuracy and the shape accuracy are improved, the product yield is improved, the mold maintenance is facilitated and simplified, the mold Various effects such as a reduction in the number of components and a reduction in manufacturing costs associated with these effects can be achieved.

  In the present embodiment, a total of four sliding molds are provided, but a total of six sliding molds are configured by appropriately changing the shape of the internal space of the mold and the inclination angle of the press surface of the sliding mold. And you may produce the product which processed all 6 surfaces with the sliding metal mold | die. Further, the sectional view of the product 18 may not be a regular hexagon.

As in the first embodiment, the pressing method using the pressing device of this embodiment is suitable for, for example, the formation process of the spanner hanging portion of the tubular body of the temperature sensor proposed in Utility Model Registration No. 3108736. It is. It is also preferable to perform hexagonal caulking as the outer shape of the relay sleeve in the sheath cable connection structure proposed in JP2011-111501A.
Other configurations and modifications are the same as those in the first embodiment, and a description thereof will be omitted.

  Next, based on FIG. 3, the press apparatus and press method of 3rd Embodiment of this invention are demonstrated. FIG. 3 is a cross-sectional view schematically showing a configuration of a main part of the press device according to the third embodiment.

  The press device of the third embodiment uses the press die 3 composed of the dies 11 and 15, and presses the workpiece W into a product 19 having a substantially isosceles triangle in cross-sectional view. A configuration similar to that of the apparatus can be adopted. The press apparatus of this embodiment uses the mold 11 having the sliding molds 31 and 32 and the mold 15 not having the sliding mold, so that the workpiece W has a substantially isosceles triangle in cross-sectional view. The product 19 can be molded.

  As shown in FIG. 3A, the dies 11 and 15 constituting the press die 3 are made of a material harder than the workpiece W. Since the mold 11 has the same configuration as that of the first embodiment, detailed description thereof is omitted. However, as described above, the sliding members 31 and 32 are configured to be movable relative to the mold body 21. The sliding members 31 and 32 are prevented from sliding relative to the workpiece W in the direction parallel to the press surfaces 41 and 42, and move together with the workpiece W.

  On the upper surface 15a side of the mold 15, there is a concave portion that is rectangular in cross-sectional view in the width direction, and protrudes upward in the width direction central portion of the mold 15 on the upper surface 15a. An internal space 15b having a convex portion 15c that is a long rectangle in the direction is formed. In addition, the width direction dimension and height dimension of the convex part 15c are set so that both may become smaller than the width direction dimension and depth dimension of the internal space 15b. By appropriately selecting the width direction dimension of the convex portion 15c, the length dimension of the bottom side of the product 19 whose sectional view is a substantially isosceles triangle can be adjusted.

  In the present embodiment, the top surface of the convex portion 15 c formed on the upper surface 15 a of the mold 15 serves as a press surface 92 that presses the lower portion of the workpiece W. The press surface 92 is not configured to be movable relative to the mold 15. However, the workpiece W is sandwiched by the press surfaces 41 and 42 of the sliding dies 31 and 32 so as not to move in the horizontal direction (width direction), and the sliding guide surfaces 61 and 62 of the sliding dies 31 and 32 are used. Since the deformation direction of the lower part of the work W accompanying the movement along the line and the normal direction of the press surface 92 coincide with each other, the direction parallel to the press surface 92 is reduced between the lower part of the work W and the press surface 92. Slip relative movement does not occur. For this reason, the press surfaces 41, 42, and 92 move together with the workpiece W that is deformed along the respective normal directions, and press surfaces that respectively form three surfaces that are substantially isosceles triangles in cross-sectional view of the product 19. It has become. Therefore, in the present embodiment, a beautiful product 19 having a substantially isosceles triangle in sectional view and a good surface roughness is obtained by using only two sliding dies 31 and 32.

  In the pressing method of the present embodiment, after setting the workpiece W in the workpiece storage space of the press die 3 as shown in FIG. 3A, the die 11 is moved to the arrow 81 as shown in FIG. And the mold 15 is raised in the direction of the arrow 82 to pressurize the workpiece W. The sliding molds 31 and 32 maintain the contact at the contact points 71 and 72 where the press surfaces 41 and 42 first contact with the work W as the pressurization progresses while pressurizing the upper part of the work W. As it is, it moves on the sliding guide surfaces 61 and 62 in the internal space 21b. On the other hand, the press surface 92 of the convex portion 15 c formed in the internal space 15 b of the mold 15 pressurizes the lower portion of the workpiece W while maintaining the initial contact state with the workpiece W. Finally, as shown in FIG. 3C, the sliding molds 31 and 32 move to the upper part of the internal space 21b of the mold body 21, and the press molding of the workpiece W is completed. As a result, a product 19 having a substantially isosceles triangle in sectional view is obtained.

  According to the present embodiment, as in the first and second embodiments, the surface roughness, dimensional accuracy, and shape accuracy of the exterior surface of the product 19 are improved, the product yield is improved, and the mold maintenance is facilitated. Various effects such as simplification, reduction in the number of mold parts, and reduction in manufacturing costs associated with these effects can be achieved.

The press method using the press apparatus of the present embodiment is, for example, in the shape of a sheath thermocouple having a cross-sectional view of a thermocouple for temperature measurement proposed in Japanese Patent Application Laid-Open No. 2012-88171. It is suitable for the case where it is formed and processed into a triangular shape.
Other configurations and modifications are the same as those in the first embodiment, and a description thereof will be omitted.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. For example, the present invention can be applied to a polygonal shape other than a quadrangle, a hexagon, or a triangle, or an irregular shape having a curved surface portion in part.

1, 2, 3 Press mold 11, 12, 13, 14, 15 Mold 15a Mold upper surface 15b Mold internal space 17, 18, 19 Product 21, 22, 23, 24 Mold body 21a, 23a Mold Lower surface of mold body 22a, 24a Upper surface of mold body 21b, 22b, 23b, 24b Internal space of mold body 15c, 23c, 24c Convex part 23d, 23e, 24d, 24e Space 31, 32, 33, 34, 35, 36, 37, 38 Sliding mold 41, 42, 43, 44, 45, 46, 47, 48 Press surface 51, 52, 53, 54, 55, 56, 57, 58 Sliding surface 61, 62, 63, 64, 65, 66, 67, 68 Sliding guide surface 71, 72, 73, 74 Contact point 81, 82 Arrow 90, 91, 92 Press surface

Claims (7)

A press device that pressurizes and deforms a workpiece with a mold,
A portion having a flat surface or a pressing surface that is a convex curved surface that obliquely hits the workpiece of the mold is configured to be movable relative to the mold body,
As the mold moves, the part having the pressing surface moves integrally with the workpiece deformed along the normal direction of the pressing surface without moving relative to the workpiece in the sliding direction parallel to the pressing surface. A press device characterized by. Configuration of the portion having the mold body and the press surface with a material harder than the workpiece, configuration in which a lubricant is interposed between the mold body and the portion having the press surface, and the press surface At least one of the configurations selected from the group consisting of: a portion having a pressing surface side made of a material having a high friction coefficient with respect to the workpiece; and a die body side made of a material having a low friction coefficient with respect to the die body The press apparatus according to claim 1, wherein a frictional force on the workpiece at a portion having the press surface is greater than a frictional force on the mold body at the portion having the press surface. The part having the press surface is provided in a single or plural pairs at positions symmetrical with respect to the center line along the moving direction of the mold, and each part is configured to be movable relative to the mold body. The press apparatus according to claim 1 or 2 . A portion having a press surface substantially parallel to the press surface is provided at a position symmetrical to the portion having the press surface of the other die and the center of the workpiece. The press device according to any one of claims 1 to 3 , wherein the portion is configured to be relatively movable with respect to a die body of the die. The part having the pressing surface is constituted by a sliding mold having a pressing surface and a sliding surface sliding with respect to the mold body, and the sliding mold is moved along with the movement of the mold. 2. The relative movement with respect to the mold body moves together with the workpiece deformed along the normal direction of the press surface without relative movement with respect to the workpiece in a sliding direction parallel to the press surface. Press device according to any one of 1-4. It is a press die used for the press apparatus of any one of Claims 1-5 , Comprising: The site | part which has a press surface which is a flat surface which protrudes diagonally to a workpiece | work, or a convex curved surface is relative to a die main body. A workpiece that is configured to be movable and deforms along the normal direction of the press surface without causing the portion having the press surface to move relative to the workpiece in a sliding direction parallel to the press surface as the mold moves. A press die that moves as one. A pressing method in which a workpiece is pressure-deformed with a mold,
A portion having a flat surface or a press surface that is a convex curved surface that obliquely hits the workpiece of the mold is configured to be movable relative to the mold body,
After the press surface comes into contact with the workpiece during pressing, the portion having the press surface moves relative to the die body as the die moves, so that the workpiece slides parallel to the press surface. A pressing method characterized by moving together with a workpiece deforming along a normal direction of a press surface without relative movement in the direction.

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