JP2009142880A - Forging apparatus and forging method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forging apparatus having a simple constitution and capable of simplifying a manufacturing process of a workpiece. <P>SOLUTION: The forging apparatus for forging a workpiece is provided with an oscillating die 3 which has a working groove 3a for working the workpiece in the predetermined shape and is oscillated in the direction substantially orthogonal to the longitudinal direction of a workpiece to press the workpiece with the working groove 3a. A surface 3c of the working groove 3a of the forging apparatus is formed in a grind stone shape, and burrs formed on the surface of the workpiece can be removed by the surface 3c of the working groove 3a while pressing the workpiece by the working groove 3a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a forging device and a forging method for processing a workpiece by forging.

  Conventionally, an injection needle or the like has been manufactured by processing a tip portion of a tubular member having a small diameter into a pointed shape. As a processing method of this kind of pointed shape, a processing method is known in which the tip portion of a tubular member is processed into a pointed shape by cold forging (for example, see Patent Document 1).

  In the processing method described in Patent Document 1, the tip of a pipe is struck by reciprocating two dies arranged with a tubular member (pipe) for an injection needle in the radial direction of the pipe and hitting the pipe with the dies. The diameter of the part is made thin. Further, in the processing method described in Patent Document 1, while reciprocating in the radial direction of the pipe while rotating the die, the die is moved in the axial direction from the distal end side of the pipe to reduce the diameter of the distal end portion. In the processing method described in Patent Document 1, after the diameter of the tip portion of the pipe is reduced, the tip portion is cut into a pointed shape by obliquely cutting the tip portion.

JP 2005-21672 A

  However, in the processing method described in Patent Document 1, since two dies are reciprocated in the radial direction of the pipe and the pipe is struck with the dies, burrs usually occur at the joint of the two dies. . Therefore, the processing method described in Patent Document 1 requires a separate process for removing burrs after hitting the pipe with a die, and the manufacturing process of the injection needle becomes complicated. In addition, when the die has a special structure or when the accuracy of the die is very high, it is possible to prevent the occurrence of burrs at the joint of the die. Cost increases.

  Accordingly, an object of the present invention is to provide a forging device and a forging method that can simplify the manufacturing process of a workpiece with a simple configuration.

  In order to solve the above-described problems, the present invention provides a forging device for forging a workpiece by forging and has a machining groove for machining the workpiece into a predetermined shape and at least substantially orthogonal to the longitudinal direction of the workpiece. A vibration die that vibrates in a direction to press and pressurizes the workpiece with the processing groove, and the surface of the processing groove is formed in a grindstone shape.

  In the forging device of the present invention, the surface of the processing groove that is formed on the vibrating die and pressurizes the workpiece is formed in a grindstone shape. For this reason, it is possible to remove burrs generated on the surface of the workpiece by the processing grooves whose surface is a grindstone while pressing the workpiece with the processing grooves. For example, when pressurizing a workpiece with a machining groove, the workpiece is rotated relative to the vibration die, or the workpiece is moved relative to the vibration die in the axial direction. It is possible to remove the burrs generated on the surface of the surface with the processed grooves. Therefore, in the present invention, it is not necessary to provide a separate process for removing burrs, and as a result, the manufacturing process of the workpiece can be simplified with a simple configuration in which the surface of the processing groove is formed in a grindstone shape. Is possible.

  In the present invention, it is preferable that the edge of the processing groove is formed sharply. If comprised in this way, it will become possible to remove the burr | flash which arises in a to-be-processed object using the edge of a process groove | channel. Therefore, it is possible to reliably remove burrs generated on the workpiece.

  Further, in order to solve the above problems, the present invention provides a forging device for forging a workpiece by forging and has a machining groove for machining the workpiece into a predetermined shape and at least in the longitudinal direction of the workpiece. A vibration die that vibrates in a substantially orthogonal direction and pressurizes the workpiece in the processing groove; and a fixed die that has a processing groove for processing the workpiece into a predetermined shape and is disposed to face the vibration die. At least one of the surface of the processing groove of the vibration die and the surface of the processing groove of the fixed die is formed in a grindstone shape.

  In the forging device of the present invention, at least one of the surface of the machining groove formed on the vibrating die and the surface of the machining groove formed on the stationary die is formed in a grindstone shape. Therefore, it is possible to remove burrs generated on the surface of the workpiece by the processing groove of the vibrating die and / or the processing groove of the fixed die while pressing the workpiece with the processing groove. Become. Therefore, in the present invention, there is no need to separately provide a process for removing burrs, and as a result, the surface of the processing groove of the vibration die and / or the processing groove of the fixed die is formed in a grindstone shape, It becomes possible to simplify the manufacturing process of a workpiece.

  In the present invention, it is preferable that at least one of the edge of the vibration groove and the edge of the stationary die is formed sharply. If comprised in this way, it will become possible to remove the burr | flash which arises in a to-be-processed object using the edge of a process groove | channel. Therefore, it is possible to reliably remove burrs generated on the workpiece.

  In the present invention, it is preferable to provide a rotation mechanism that rotates the workpiece or the vibration die about the axis center of the workpiece. If comprised in this way, it will become possible to make the burr | flash which arises in a to-be-processed object contact the surface or edge of a process groove | channel reliably. Therefore, it is possible to reliably remove burrs generated on the workpiece.

  In the present invention, it is preferable to include a vibration applying mechanism for ultrasonically vibrating the vibration die. If comprised in this way, it will become possible to increase the frequency | count of pressurization per unit length of the workpiece sent to an axial direction by a feed mechanism, and it will become difficult to produce a comparatively big burr | flash on a workpiece. As a result, it is possible to reliably remove burrs generated on the workpiece by the surface or edge of the machining groove.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a forging device for forging a workpiece by forging and has a machining groove for machining the workpiece into a predetermined shape and at least in the longitudinal direction of the workpiece. A vibration die that vibrates in a substantially orthogonal direction and pressurizes the workpiece in the machining groove is provided, and the surface of the machining groove has irregularities that can remove burrs generated on the surface of the workpiece pressed by the vibration die. It is formed.

  In the forging device of the present invention, irregularities capable of removing burrs generated on the surface of the workpiece pressed by the vibration die are formed on the surface of the processing groove formed on the vibration die and pressurizing the workpiece. . Therefore, it is possible to remove burrs generated on the workpiece due to the unevenness formed on the surface of the processing groove while pressurizing the workpiece with the processing groove. As a result, in the present invention, it is not necessary to separately provide a process for removing burrs, and the manufacturing process of the workpiece is simplified with a simple configuration in which irregularities that can remove burrs are formed on the surface of the processed groove. It becomes possible to do.

  Furthermore, in order to solve the above problems, the present invention provides a forging device for forging a workpiece by forging and has a machining groove for machining the workpiece into a predetermined shape and at least the longitudinal direction of the workpiece. A vibration die that vibrates in a direction substantially orthogonal to the workpiece and pressurizes the workpiece with the machining groove, and a fixed die that has a machining groove for machining the workpiece into a predetermined shape and is disposed opposite to the vibration die. In addition, at least one of the surface of the processing groove of the vibration die and the surface of the processing groove of the fixed die has irregularities that can remove burrs generated on the surface of the workpiece pressed by the vibration die. It is characterized by.

  In the forging device of the present invention, at least one of the surface of the processed groove formed on the vibrating die and the surface of the processed groove formed on the stationary die is generated on the surface of the workpiece pressed by the vibrating die. Unevenness that can remove burrs is formed. Therefore, it is possible to remove burrs generated on the workpiece due to the unevenness formed on the surface of the processing groove of the vibration die and / or the surface of the processing groove of the fixed die while pressurizing the workpiece with the processing groove. . As a result, in the present invention, it is not necessary to separately provide a process for removing burrs, and the manufacturing process of the workpiece is simplified with a simple configuration in which irregularities that can remove burrs are formed on the surface of the processed groove. It becomes possible to do.

  Further, in order to solve the above-mentioned problems, the present invention provides a forging method for forging a workpiece by forging a vibration die having a machining groove whose surface is formed in a grindstone shape at least in a longitudinal direction of the workpiece. It is characterized by comprising a pressurizing step of forging the workpiece by oscillating in the orthogonal direction and pressurizing the workpiece with the machining groove.

  In the forging method of the present invention, in a pressurizing step, a vibrating die having a processing groove whose surface is formed in a grindstone shape is vibrated to pressurize the workpiece in the processing groove. For this reason, it is possible to remove burrs generated on the surface of the workpiece by the processing grooves whose surface is a grindstone while pressing the workpiece with the processing grooves. As a result, in the present invention, it is not necessary to separately provide a process for removing burrs, and the manufacturing process of the workpiece can be simplified with a simple configuration using a processing groove whose surface is formed in a grindstone shape. It becomes possible.

  Furthermore, in order to solve the above-described problems, the present invention provides a forging method for forging a workpiece by forging at least a vibrating die having a surface facing a fixed die having a machining groove formed in a grindstone shape. It is characterized by comprising a pressurizing step of forging the work piece by oscillating in a direction substantially perpendicular to the longitudinal direction of the work piece and pressurizing the work piece with a work groove.

  In the forging method of the present invention, in the pressurizing step, the workpiece is pressed in the processing groove by vibrating a vibration die disposed opposite to a fixed die having a processing groove whose surface is formed in a grindstone shape. Therefore, it is possible to remove burrs generated on the surface of the workpiece by the processing grooves of the fixed die whose surface is a grindstone while pressing the workpiece with the processing grooves. As a result, in the present invention, it is not necessary to separately provide a process for removing burrs, and the manufacturing process of the workpiece can be simplified with a simple configuration using a processing groove whose surface is formed in a grindstone shape. It becomes possible.

  In the present invention, in the pressurizing step, it is preferable that the workpiece is always rotated around the axis center of the workpiece as a rotation center. If comprised in this way, it will become possible to make the burr | flash which arises in a to-be-processed object contact the surface of a process groove | channel reliably. Therefore, it is possible to reliably remove burrs generated on the workpiece. In addition, if configured in this way, the occurrence of burrs on the surface of the workpiece can be changed, so that relatively large burrs are hardly generated on the workpiece. Therefore, it is possible to reliably remove burrs generated on the workpiece on the surface of the machining groove.

  As described above, in the forging device and the forging method of the present invention, the manufacturing process of the workpiece can be simplified with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of forging device)
FIG. 1 is an exploded perspective view showing a forging device 1 according to an embodiment of the present invention. 2A and 2B are diagrams showing the tubular member 2 processed by the forging device 1 in FIG. 1, in which FIG. 2A shows an example thereof, and FIG. 2B shows another example. 3A and 3B are views showing the dies 3 and 4 shown in FIG. 1, in which FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view showing the EE cross section of FIG. FIG. 4 is an enlarged perspective view of the processing groove 3a shown in FIG. FIG. 5 is a view for explaining the vibration of the die 3 shown in FIG.

  In the following description, the X direction in FIG. 1 is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the height direction. In FIG. 1, the X1 direction is the right, the X2 direction is the left, the Y1 direction is the front, the Y2 direction is the rear (back), the Z1 direction is the top, and the Z2 direction is the bottom. Further, a plane composed of the X direction and the Y direction is defined as an XY plane.

  The forging device 1 according to the present embodiment forms a tip portion 2a (see FIG. 2) of a hollow cylindrical tubular member 2 to be processed into a substantially conical point by cold forging in order to manufacture an injection needle or the like. It is a device that processes into a shape. As shown in FIG. 1, the forging device 1 includes a pair of dies 3 and 4 for processing the distal end portion 2 a of the tubular member 2, and a guide portion 5 that guides the tubular member 2 toward the dies 3 and 4. The first die attachment portion 6 to which the die 3 is attached, the second die attachment portion 7 to which the die 4 is attached, and the base plate 8 on which the first and second die attachment portions 6 and 7 are placed and fixed. I have.

  In this embodiment, the dies 3 and 4 are disposed so that later-described processed grooves 3a and 4a formed in the dies 3 and 4 face each other in the left-right direction. That is, the first die attaching portion 6 and the second attaching portion 7 are placed on the base plate 8 so as to be adjacent in the left-right direction.

  Further, the forging device 1 includes a spindle (not shown) that holds the upper end side of the tubular member 2 above the dies 3 and 4. The spindle includes a rotation mechanism that rotates the tubular member 2 around the axial center of the tubular member 2 that is arranged so that the longitudinal direction of the tubular member 2 coincides with the vertical direction, and the tubular member in the axial direction. And a direct acting feed mechanism for feeding 2.

  The rotation mechanism includes, for example, a motor that rotates a chuck that holds the tubular member 2. The feed mechanism includes, for example, a ball screw that moves the chuck in the vertical direction, a linear guide, a motor that rotates the ball screw, and the like, and the tubular member 2 is inserted into processing grooves 3a and 4a described later formed in the dies 3 and 4 from above. insert. In this embodiment, the rotational speed of the tubular member 2 rotated by the rotating mechanism is lower than the rotational speed of the workpiece in general metal processing (drilling, milling or grinding). Further, the feed amount per unit time of the tubular member 2 fed by the feed mechanism is relatively small.

  As described above, the forging device 1 processes the tip portion 2a of the tubular member 2 into a pointed shape by forging. Therefore, the tubular member 2 is formed of, for example, a metal material that can be plastically processed. Further, since the tip portion 2a of the tubular member 2 is forged, the hardness of the tip portion 2a is relatively high. The tubular member 2 may be formed of a nonmetallic material (for example, a resin material) that can be plastically processed.

  The forging device 1 of this embodiment is suitable for processing the tubular member 2 having a fine diameter. For example, the outer diameter D1 of the tubular member 2 processed by the forging device 1 is about 0.05 to 0.5 mm, and the inner diameter D2 is about 0.02 to 0.3 mm (see FIG. 2). In addition, the length L1 of the tip portion 2a formed in a substantially conical shape so as to have a pointed shape is about 0.5 to 2 mm. In this embodiment, the outer diameter D1 is about 0.1 mm, the inner diameter D2 is about 0.04 mm, and the length L1 is about 0.5 mm. The total length L2 of the tubular member 2 is about 20 mm.

  Further, the forging device 1 processes the distal end portion 2a of the tubular member 2 into, for example, a pointed shape as shown in FIG. That is, as shown in FIG. 2 (A), the tip portion 2a is processed into a conical shape with a sharp tip (right end in FIG. 2) of the tubular member 2 by the forging device 1. Alternatively, as shown in FIG. 2B, the forging device 1 processes the tip portion 2a into a truncated cone shape in which a slightly flat portion remains at the tip of the tubular member 2.

  When the tip portion 2a is processed in a conical shape, as shown in FIG. 2A, the end (right end) of the through hole 2b formed on the inner diameter side of the tubular member 2 before processing is closed by processing. It is. Further, when the tip portion 2a is processed into a truncated cone shape, as shown in FIG. 2B, the through hole 2b remains in a state of being penetrated or the end of the through hole 2b is blocked. There is. When the end of the through hole 2b is closed, a hole is formed from the outer peripheral surface of the tip portion 2a to the through hole 2b. Moreover, the outer peripheral surface of the front-end | tip part 2a is a smooth surface.

  The dies 3 and 4 are a substantially rectangular parallelepiped mold formed of a metal block member, and a split mold in which a mold for processing the tip portion 2a into a pointed shape is divided into two. As shown in FIG. 3, a processing groove 3 a is formed on the left side surface of the die 3 to pressurize the tip portion 2 a and process it into a pointed shape. Further, a processing groove 4a is formed on the right side surface of the die 4 disposed opposite to the left side surface of the die 3 to pressurize the tip portion 2a and process it into a pointed shape. In other words, forging grooves 3a and 4a are formed in the dies 3 and 4, respectively. The die 3 is formed with an insertion hole 3b through which a fixing screw 9 for fixing the die 3 to the first die attachment portion 6 is inserted. The die 4 is connected to the second die attachment portion 7. An insertion hole 4b through which a fixing screw 9 for fixing is inserted is formed.

  The processing grooves 3a and 4a are formed in a shape corresponding to the pointed shape formed in the tip portion 2a. Specifically, each of the processing grooves 3a and 4a is formed in a semi-conical shape. That is, when the left side surface of the die 3 and the right side surface of the die 4 are brought into contact with each other, a conical hole that is recessed downward from the upper surface of the dies 3 and 4 and has the lower side as a vertex is formed in the machining groove 3a. The processed grooves 3a and 4a are formed so as to be formed by 4a.

  Further, in this embodiment, the surface (inner surface) 3c (see FIG. 4) of the processed groove 3a is so small that burrs 2d (see FIG. 7) generated on the surface of the tubular member 2 can be removed as described later. Concavities and convexities (not shown) are formed. Specifically, irregularities of about 5 to 10 μm are formed on the surface 3c. That is, the surface 3c of the processed groove 3a is formed in a fine grindstone shape, and the surface 3c is not a mirror surface. Moreover, the edge 3d (refer FIG. 4) of the process groove | channel 3a is formed sharply. Specifically, the edge 3d is formed in a curved surface having a very small radius with a radius of curvature of about 10 μm.

  In this embodiment, minute irregularities are formed on the surface (inner surface) 4c (see FIG. 8) of the processed groove 4a so that the burrs 2d generated on the surface of the tubular member 2 can be removed, similarly to the surface 3c of the processed groove 3a. (Not shown) is formed. That is, the surface 4c of the processed groove 4a is also formed in a fine grindstone shape and is not a mirror surface. Further, the edge 4d (see FIG. 8) of the processed groove 4a is also sharply formed in the same manner as the edge 3d of the processed groove 3a.

  The size of the irregularities on the surfaces 3c and 4c is appropriately set depending on the material of the tubular member 2 and the like. Therefore, the size of the unevenness of the surfaces 3c and 4c may be less than 5 μm or may exceed 10 μm. Further, the radii of curvature of the edges 3d and 4d are appropriately set depending on the material of the tubular member 2 and the like. Therefore, the curvature radii of the edges 3d and 4d may be less than 10 μm or may exceed 10 μm. In this embodiment, since the material of the tubular member 2 is the same material as stainless steel or stainless steel, as described above, the surface 3c, 4c has irregularities of about 5-10 μm, and the radii of curvature of the edges 3d, 4d. Is about 10 μm. Note that the irregularities on the surface of the grindstone that is used for grinding processing of a general metal and that is close to the finishing process have the same size as the irregularities of the surfaces 3c and 4c. . That is, the unevenness of the surfaces 3c and 4c is large enough not to affect the function of the tubular member 2 that becomes an injection needle or the like even if the surface of the distal end portion 2a of the tubular member 2 is roughened by the unevenness during pressurization. It has become.

  As shown in FIG. 1, the guide portion 5 is constituted by two guide plates that are fixed in contact with each other in the front-rear direction. Guide holes (not shown) through which the tubular member 2 is inserted are formed on the contact surfaces of the two guide plates. By this guide hole, the tubular member 2 is guided in the vertical direction and toward the processing grooves 3a and 4a. The guide portion 5 is fixed to the upper portion of the second die attachment portion 7.

  The first die attaching portion 6 includes a vibration generating portion 11 as a vibration applying mechanism that fixes the die 3 and applies vibration to the die 3. That is, in this embodiment, the die 3 attached to the first die attachment portion 6 is a vibrating die that vibrates and pressurizes the tip portion 2a. The first die attaching portion 6 includes a support portion 12 that supports the vibration generating portion 11, a Y-axis moving mechanism 13 that moves the support portion 12 in the front-rear direction (Y direction), and a support portion together with the Y-axis moving mechanism 13. An X-axis moving mechanism 14 that moves 12 in the left-right direction (X direction) is provided.

  The vibration generating unit 11 includes a vibration generating element (not shown) serving as a vibration source, and a transmission member 15 that transmits the vibration generated by the vibration generating element to the die 3. The vibration generating element is, for example, a piezoelectric element or a magnetostrictive element. Further, the vibration generator 11 of the present embodiment vibrates the die 3 so that the vibration frequency of the die 3 is in the ultrasonic frequency region. That is, the vibration generator 11 of this embodiment causes the die 3 to vibrate ultrasonically.

  The transmission member 15 is a metal block member, and is formed in a substantially rectangular parallelepiped shape elongated in the left-right direction. On the left end side of the transmission member 15, a die fixing portion 15a to which the die 3 is fixed is formed so as to be recessed from the upper surface to the lower side. A screw hole into which the fixing screw 9 is screwed is formed in the die fixing portion 15a. Further, at the front-rear direction end of the transmission member 15, a protruding portion 15b protruding upward and a protruding portion 15c protruding downward are formed in a predetermined range from the right end to the left side. .

  Two protrusions 15d that protrude further upward from the protrusion 15b are formed in the protrusion 15b with a predetermined interval in the left-right direction. Similarly, two protrusions 15e that protrude further downward from the protrusion 15c are formed on the protrusion 15c with a predetermined interval in the left-right direction. The protrusions 15d and 15e are formed at so-called node portions where the amplitude of the transmission member 15 is substantially zero when vibrating due to vibration generated by the vibration generating element.

  In the present embodiment, the vibration generating element is attached between the two protruding portions 15b formed at the front-rear direction end of the transmission member 15. Specifically, the vibration generating element is attached so that the amplitude of the die fixing portion 15a (more specifically, the amplitude in the vicinity of the machining groove 3a of the die 3 fixed to the die fixing portion 15a) is maximized. Yes. Note that the vibration generating element may be attached between the two projecting portions 15 c that project toward the lower side of the transmission member 15. Further, the vibration generating element may be attached between both of the two protrusions 15b and between the two protrusions 15c, or attached to the recess 15f formed on the right end surface of the transmission member 15. Also good.

  The support portion 12 includes a placement member 16 on which the transmission member 15 is placed, a pressing member 17 that presses and fixes the transmission member 15 from above, and 2 for adjusting the inclination of the transmission member 15 on the XY plane. A contact plate 18 and four adjustment screws 19 are provided.

  The mounting member 16 includes a flat plate portion 16 a formed in a flat plate shape and two fixing portions 16 b for fixing the pressing member 17. The two fixing portions 16b are formed so as to protrude upward from the upper surface of the flat plate portion 16a with a predetermined interval in the front-rear direction. Two screw holes 16c into which the adjustment screws 19 are screwed are formed in the two fixing portions 16b so as to penetrate in the front-rear direction with a predetermined interval in the left-right direction.

  The pressing member 17 is formed in a flat plate shape, and is fixed to the upper surface of the fixing portion 16b by a fixing screw. In this embodiment, the pressing member 17 is fixed to the upper surface of the fixing portion 16b in a state where the transmission member 15 disposed between the two fixing portions 16b is sandwiched between the upper surface of the flat plate portion 16a and the lower surface of the pressing member 17. Has been. As described above, the transmission member 15 is fixed to the support portion 12 by fixing the pressing member 17 to the fixing portion 16b. In a state where the transmission member 15 is fixed to the support portion 12, the upper surface of the flat plate portion 16a and the lower end of the protrusion 15e are in contact with each other, and the lower surface of the pressing member 17 and the upper end of the protrusion 15d are in contact with each other.

  Each of the two contact plates 18 is disposed between the transmission member 15 and the fixing portion 16b in a state of contacting the front surface or the rear surface of the transmission member 15. The tip of the adjustment screw 19 screwed into the screw hole 16c is in contact with the outer surface of the contact plate 18 in the front-rear direction. Depending on the screwing amount of the adjustment screw 19 into the screw hole 16c, the tip of the adjustment screw 19 is on the XY plane. The inclination of the transmission member 15 is adjusted.

  The Y-axis moving mechanism 13 includes an adjustment dial 21 to which a driving mechanism such as a ball screw and a linear guide that moves the support portion 12 in the Y direction is connected, a fixing portion 22 to which the adjustment dial 21 and the ball screw are fixed, The member 16 is fixed and includes a movable portion 23 that moves relative to the fixed portion 22 in the front-rear direction. In the Y-axis moving mechanism 13, the movable portion 23 slides relative to the fixed portion 22 and moves in the front-rear direction by manually turning the adjustment dial 21. That is, when the adjustment dial 21 is manually turned, the die 3 moves in the front-rear direction together with the support portion 12 and the like.

  The X-axis moving mechanism 14 includes an adjustment dial 24 connected to a driving mechanism such as a ball screw or a linear guide that moves the support portion 12 in the left-right direction together with the Y-axis moving mechanism 13, and an adjustment dial 24 and a ball screw. A fixed part 25 fixed to the base plate 8 and a fixed part 22 of the Y-axis moving mechanism 13 are fixed, and a movable part 26 that moves relative to the fixed part 25 in the left-right direction is provided. In the X-axis moving mechanism 14, the movable portion 26 slides with respect to the fixed portion 25 and moves in the left-right direction by manually turning the adjustment dial 24. That is, by manually turning the adjustment dial 24, the die 3 is moved in the left-right direction together with the Y-axis moving mechanism 13 and the like.

  The second die attachment portion 7 includes a fixing member 28 to which the die 4 is fixed, and a support portion 29 that supports the fixing member 28. In this embodiment, since the second die attachment portion 7 does not include a vibration generating source, the die 4 attached to the second die attachment portion 7 does not vibrate. That is, in this embodiment, the die 4 attached to the second die attaching portion 7 is a fixed die that is disposed to face the die 3 in a fixed state.

  The fixing member 28 is a metal block member similar to the transmission member 15, and is formed in a substantially rectangular parallelepiped shape elongated in the left-right direction. On the right end side of the fixing member 28, a die fixing portion 28a to which the die 4 is fixed is formed so as to be recessed from the upper surface to the lower side. A screw hole into which the fixing screw 9 is screwed is formed in the die fixing portion 28a. Further, a recessed portion 28b that is recessed downward is formed at a position of the fixing member 28 adjacent to the die fixing portion 28a. A vibration generating element can be disposed in the recess 28b.

  The support portion 29 includes a mounting member 30 on which the fixing member 28 is placed, a pressing member 31 that presses and fixes the fixing member 28 from above, and 2 for adjusting the inclination of the fixing member 28 on the XY plane. A contact plate 32 and four adjustment screws 33 are provided.

  The mounting member 30 is formed so as to be sandwiched between a flat plate portion 30a formed in a flat plate shape, two fixing portions 30b for fixing the pressing member 31, and two fixing portions 30b. And a placement portion 30c to be placed. The flat plate portion 30 a is fixed to the upper surface of the base plate 8. The two fixing portions 30b are formed so as to protrude upward from the upper surface of the flat plate portion 30a with a predetermined interval in the front-rear direction. In each of the two fixing portions 30b, two screw holes 30d into which the adjusting screw 33 is screwed are formed so as to penetrate in the front-rear direction with a predetermined interval in the left-right direction. The mounting portion 30c is formed so as to protrude upward from the upper surface of the flat plate portion 30a and to be recessed from the upper surface of the fixing portion 30b.

  The pressing member 31 is formed in a flat plate shape, and is fixed to the upper surface of the fixing portion 30b by a fixing screw. In the present embodiment, the pressing member 31 is placed on the upper surface of the fixing portion 30b in a state where the fixing member 28 disposed between the two fixing portions 30b is sandwiched between the upper surface of the mounting portion 30c and the lower surface of the pressing member 31. It is fixed. Thus, the fixing member 28 is fixed to the support portion 29 by fixing the pressing member 31 to the fixing portion 30b. In a state where the fixing member 28 is fixed to the support portion 29, the upper surface of the mounting portion 30c and the lower surface of the fixing member 28 are in contact with each other, and the lower surface of the pressing member 31 and the upper surface of the fixing member 28 are in contact with each other.

  Each of the two contact plates 32 is disposed between the fixing member 28 and the fixing portion 30b in a state of contacting the front surface or the rear surface of the fixing member 28. The tip of the adjustment screw 33 screwed into the screw hole 30d is in contact with the outer surface of the contact plate 32 in the front-rear direction, and the amount of the adjustment screw 33 screwed into the screw hole 30d depends on the XY plane. The inclination of the fixing member 28 is adjusted.

  In the forging device 1 configured as described above, when the vibration generating element vibrates, the vibration is transmitted to the die 3 via the transmission member 15, and the tubular member 2 is forged. In the present embodiment, vibration having a vibration component in the radial direction (left and right direction in the present embodiment) orthogonal to the axial direction of the tubular member 2 is applied from the vibration generator 11 to the die 3, and the die 3 vibrates in the radial direction.

  In this embodiment, the die 3 is moved by the Y-axis moving mechanism 13 or the X-axis moving mechanism 14 so that the die 3 when the vibration generating element is not vibrating is arranged at the position indicated by the two-dot chain line in FIG. 3 alignment is performed. That is, the die 3 is aligned so that the die 3 when the vibration generating element is not vibrating approaches the die 4 in the radial direction. Therefore, when the vibration generating element vibrates, the die 3 first moves in a radial direction away from the die 4 as shown by a solid line in FIG. 5, and then, as shown by a two-dot chain line in FIG. Move in the direction approaching. A state indicated by a two-dot chain line in FIG. 5 is a state in which the tubular member 2 can be pressurized in the radial direction by the processing groove 3a and the processing groove 4a. In addition, the gap in the left-right direction between the die 3 and the die 4 after alignment is set according to the shape of the peak formed at the distal end portion 2 a of the tubular member 2.

(Method for forging tubular member)
FIG. 6 is a flowchart showing processing steps of the tubular member 2 according to the embodiment of the present invention. FIG. 7 is a view for explaining burrs 2d generated on the surface of the tubular member 2 in the pressing step S4 shown in FIG. FIG. 8 is a view for explaining a situation where the burr 2d generated in the tubular member 2 in the pressurizing step S4 shown in FIG. 6 is removed at the edge 4d of the processed groove 4a. FIG. 9 is a view for explaining a situation in which burrs 2d generated in the tubular member 2 in the pressurizing step S4 shown in FIG. 6 are removed on the surfaces 3c and 4c of the processed grooves 3a and 4a.

  Hereinafter, in the forging device 1, a process of processing the tip portion 2 a of the tubular member 2 into a pointed shape will be described.

  First, the dies 3 and 4 are aligned (step S1). Specifically, the dies 3 and 4 are aligned by the Y-axis moving mechanism 13 and the X-axis moving mechanism 14 so as to be in the state indicated by the two-dot chain line in FIG. Thereafter, the tubular member 2 is set (step S2). Specifically, the upper end side of the tubular member 2 is fixed to a spindle (not shown), and the tubular member 2 is inserted into a guide groove (not shown) of the guide portion 5 so as to face the processing grooves 3a, 4a. The lower end portion of the tubular member 2 is disposed between the two.

  Thereafter, the rotation of the tubular member 2 is started by the spindle rotation mechanism (step S3). Thereafter, while the tubular member 2 is rotated, the die 3 is vibrated while the tubular member 2 is inserted toward the processing grooves 3a and 4a by the spindle feed mechanism (that is, while the tubular member 2 is fed in the axial direction). Then, the tip portion 2a of the tubular member 2 is pressurized (forged) (pressurizing step S4). That is, the tip portion 2a is sandwiched and pressed between the processing groove 3a of the die 3 and the processing groove 4a of the die 4 from the left-right direction. In pressurization process S4 of this form, tubular member 2 is always rotated by a rotation mechanism. Moreover, in pressurization process S4, the tubular member 2 is continuously sent with a feed mechanism.

  Then, it is determined whether or not the processing of the tip portion 2a is completed by the pressurization in the pressurizing step S4 (whether the tip portion 2a is processed into a predetermined pointed shape) (step S5). For example, it is determined whether or not the distal end portion 2a has been processed into a predetermined pointed shape based on the amount of insertion of the tubular member 2 by the feed mechanism. When the processing of the tubular member 2 is not completed, the rotation and insertion of the tubular member 2 are continued and the vibration of the die 3 is continued.

  On the other hand, when the processing of the tubular member 2 is completed, the vibration of the die 3 is stopped and the rotation and insertion of the tubular member 2 are stopped (step S6). Thereafter, the tubular member 2 is removed from the spindle and removed from the guide portion 5 (step S7), and the peak-shaped processing is completed.

  Here, in the pressurizing step S4, the vibration of the die 3 causes the outer surface of the tubular member 2 to protrude radially outward at a position corresponding to the joint between the die 3 and the die 4 as shown in FIG. Burr 2d is generated. On the other hand, in the pressurizing step S4 of this embodiment, since the tubular member 2 is always rotated by the rotating mechanism, the burr 2d hits the edge 4d (or the edge 3d) and is sharply formed as shown in FIG. The edges 3d and 4d are cut and removed. Alternatively, as shown in FIG. 9, the burr 2d contacts the surfaces 3c and 4c of the processed grooves 3a and 4a, and is removed by grinding (or polishing) on the surfaces 3c and 4c formed in a grindstone shape.

  Note that when processing the tubular member 2, processing lubricating oil may be supplied toward the processing site (that is, between the tip portion 2 a and the processing grooves 3 a and 4 a). In this case, fine machining waste removed by the surfaces 3c and 4c and the edges 3d and 4d of the machining grooves 3a and 4a can be removed from the machining site together with the lubricating oil. Further, instead of the lubricating oil, grinding abrasive grains may be supplied to the processing site. In this case, the tip portion 2a of the tubular member 2 can be finished to a mirror surface.

(Main effects of this form)
As described above, in this embodiment, the surface 3c of the processing groove 3a of the vibrating die 3 is formed with a minute unevenness so that the burr 2d generated on the surface of the tubular member 2 can be removed and fixed. Also on the surface 4c of the die 4, minute irregularities are formed so that the burr 2d can be removed. That is, the surfaces 3c and 4c of the processing grooves 3a and 4a are formed in a grindstone shape. In the present embodiment, in the pressurizing step S4, the die 3 is vibrated and the tubular member 2 is pressed in the radial direction by the processing grooves 3a and 4a. Therefore, in this embodiment, as described above, the burr 2d generated on the surface of the tubular member 2 is removed at the surfaces 3c and 4c while pressurizing the tubular member 2 with the processing grooves 3a and 4a (that is, forging). Can do. Therefore, in this embodiment, it is not necessary to separately provide a process for removing the burr 2d. As a result, in this embodiment, the manufacturing process of the tubular member 2 can be simplified with a simple configuration in which the surfaces 3c and 4c of the processed grooves 3a and 4a are formed in a grindstone shape.

  In particular, in this embodiment, the edges 3d and 4d of the processed grooves 3a and 4a are sharply formed. Therefore, as described above, the burr 2d generated in the tubular member 2 can be removed using the edges 3d and 4d in addition to the surfaces 3c and 4c. Further, in this embodiment, the forging device 1 includes a rotation mechanism that rotates the tubular member 2, and when the tubular member 2 is pressurized with the processing grooves 3 a and 4 a, the tubular member 2 is rotated with respect to the dies 3 and 4. Yes. Therefore, the burr 2d can be reliably brought into contact with the surfaces 3c and 4c and the edges 3d and 4d. As a result, in this embodiment, the burr 2d can be reliably removed.

  Further, in this embodiment, the burr 2d is removed by grinding (or polishing) with the surfaces 3c and 4c formed in a grindstone shape, so that the surface of the distal end portion 2a of the tubular member 2 has a relatively clean finish surface. be able to.

  In this embodiment, the vibration generating unit 11 ultrasonically vibrates the die 3, and the number of pressurizations per unit length of the tubular member 2 fed in the axial direction by the feeding mechanism is increased. In this embodiment, the tubular member 2 is fed in the axial direction while the tubular member 2 is always rotated in the pressurizing step S4, and the tubular member of the burr 2d generated corresponding to the joint between the dies 3 and 4 is used. 2 can be changed. Therefore, relatively large burrs are less likely to occur in the tubular member 2. That is, the burr 2d generated in the tubular member 2 is relatively small. Therefore, the burrs 2d generated in the tubular member 2 can be reliably removed by the surfaces 3c, 4c or the edges 3d, 4d of the processed grooves 3a, 4a.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the surfaces 3c and 4c of the processed grooves 3a and 4a are all formed in a grindstone shape. In addition, for example, only one of the surfaces 3c and 4c may be formed in a grindstone shape, and the other may be formed in a mirror shape. In the embodiment described above, the edges 3d and 4d of the processed grooves 3a and 4a are all sharply formed, but only one of the edges 3d and 4d may be formed sharply. Even in these cases, it is possible to obtain the same effect as the above-described embodiment. Further, when the burr 2d can be removed only by the surfaces 3c and 4c of the processed grooves 3a and 4a, the edges 3d and 4d may not be formed sharply. When the burr 2d can be removed only by the edges 3d and 4d, the surfaces 3c and 4c can be formed in a mirror shape instead of a grindstone shape.

  In the form mentioned above, the tubular member 2 is rotated by the rotation mechanism in the pressurizing step S4. In addition to this, for example, in the pressurizing step S4, the tip 3a of the tubular member 2 is pressurized by vibrating the die 3 while moving the tubular member 2 up and down by the feed mechanism without rotating the tubular member 2. May be. Even in this case, the burrs 2d generated on the surface of the tubular member 2 at the surfaces 3c and 4c can be removed. Moreover, with the form mentioned above, although the tubular member 2 is always rotated by pressurization process S4, you may rotate the tubular member 2 intermittently. Furthermore, in the form mentioned above, although the tubular member 2 is continuously sent in the axial direction by the feed mechanism in the pressurizing step S4, the tubular member 2 may be sent intermittently.

  In the above-described embodiment, the die 3 is aligned so that the die 3 when the vibration generating element is not vibrating is arranged at the position indicated by the two-dot chain line in FIG. The dice 3 first moves in a direction away from the dice 4 and then moves in a direction approaching the dice 4. In addition to this, for example, when the vibration generating element vibrates, the die 3 is aligned so that the die 3 when the vibration generating element is not vibrating is separated from the die 4 in the radial direction. It moves to the direction which approaches the die | dye 4 in radial direction, and you may move to the direction which leaves | separates from the die | dye 4 after that.

  In the embodiment described above, as shown in FIG. 5, vibration having a vibration component in the radial direction of the tubular member 2 is applied to the die 3 from the vibration generating unit 11, and the die 3 vibrates in the radial direction. In addition, for example, vibration having an axial vibration component of the tubular member 2 and a radial vibration component of the tubular member 2 is applied to the die 3 from the vibration generating unit 11, and the die 3 is axially directed to the tubular member 2. And it may vibrate in the radial direction. For example, vibration may be applied to the die 3 so that the die 3 vibrates in a substantially arc shape. That is, a vibration may be applied to the die 3 such that the locus when the die 3 vibrates when viewed in the front-rear direction has a substantially arc shape. Further, vibration may be applied to the die 3 so that the locus of the die 3 when viewed in the front-rear direction is substantially circular or substantially elliptical. In addition, vibration may be applied to the die 3 such that the locus of vibration of the die 3 when viewed in the front-rear direction is a straight line that is inclined.

  In the embodiment described above, the die 4 is fixed, and the die 3 vibrates when the tubular member 2 is processed. In addition, for example, the die 3 may be fixed and the die 4 may vibrate when the tubular member 2 is processed. That is, the die 4 may be a vibrating die. Further, when the tubular member 2 is processed, both the die 3 and the die 4 may vibrate. That is, both dies 3 and 4 may be vibration dies. In this case, the dies 3 and 4 may vibrate so as to draw a similar trajectory, or the dies 3 and 4 may vibrate so as to draw different trajectories.

  In the embodiment described above, the vibration generating element is fixed to the transmission member 15, and the vibration of the vibration generating element is transmitted to the transmission member 15. In addition, for example, a vibration generation source such as a vibration motor with an eccentric shaft, a voice coil motor, or a solenoid is disposed in the vicinity of the transmission member 15, and vibrations generated by these vibration generation sources are transmitted to the transmission member 15. May be. Further, a vibration generation source such as a bolt tightening Langevin (BLT) may be directly attached (that is, built in) to the die 3, and the die 3 may vibrate due to vibration generated by the BLT.

  In the embodiment described above, the spindle that holds the tubular member 2 includes the rotation mechanism that rotates the tubular member 2. Instead of this rotation mechanism, the dies 3 and 4 are rotated about the axis center of the tubular member 2 as the rotation center. A rotating mechanism may be provided. Moreover, in the form mentioned above, although the forging device 1 is provided with a pair (that is, two) of dies 3 and 4 divided into two, the forging device 1 is provided with a plurality of dies that are divided into three or more. Also good.

  In the embodiment described above, the workpiece processed by the forging device 1 is the hollow cylindrical tubular member 2, but the workpiece processed by the forging device 1 is not limited to the tubular member 2. For example, the workpiece processed by the forging device 1 may be a stepped cylindrical member 52 as shown in FIG. In this case, the processing grooves 3a and 4a are formed in a stepped semi-cylindrical shape. In this case, in the pressurizing step S4, pressurization may be performed in the processing grooves 3a and 4a in a state where the columnar member 52 is stopped. Further, in the pressurizing step S4, when the workpiece is pressurized while moving the workpiece up and down without rotating the workpiece, the cross-sectional shape of the workpiece in the radial direction is not circular. The shape may not be a diamond shape.

  In the embodiment described above, the vibration generating unit 11 vibrates the dice 3 at a vibration frequency that is an ultrasonic frequency region. In addition to this, for example, the vibration generating unit 11 may vibrate the die 3 at a vibration frequency lower than the ultrasonic frequency region.

It is a disassembled perspective view which shows the forging apparatus concerning embodiment of this invention. It is a figure which shows the tubular member processed with the forging apparatus of FIG. 1, (A) shows the example, (B) shows another example. It is a figure which shows the dice | dies shown in FIG. 1, (A) is a top view, (B) is sectional drawing which shows the EE cross section of (A). It is an expansion perspective view of the processing groove shown in FIG. It is a figure for demonstrating the vibration of the die | dye shown in FIG. It is a flowchart which shows the manufacturing process of the tubular member concerning embodiment of this invention. It is a figure for demonstrating the burr | flash produced on the surface of a tubular member by the pressurization process shown in FIG. It is a figure for demonstrating the condition where the burr | flash which arose in the tubular member by the pressurization process shown in FIG. 6 is removed by the edge of a process groove | channel. It is a figure for demonstrating the condition where the burr | flash which arose in the tubular member by the pressurization process shown in FIG. 6 was removed on the surface of a process groove | channel. It is a perspective view which shows the workpiece concerning other embodiment of this invention.

Explanation of symbols

1 Forging device 2 Tubular member (workpiece)
3 Dice (vibrating dice)
3a, 4a Processed groove 3c, 4c Surface 3d, 4d Edge 4 Dies (fixed dies)
11 Vibration generator (vibration applying mechanism)
52 Cylindrical member (workpiece)
S4 Pressurization process

Claims (11)

In a forging machine that processes workpieces by forging,
It has a processing die for processing the workpiece into a predetermined shape, and includes a vibrating die that vibrates in at least a direction substantially perpendicular to the longitudinal direction of the workpiece and pressurizes the workpiece with the processing groove,
The forging apparatus characterized in that the surface of the processed groove is formed in a grindstone shape.   The forging device according to claim 1, wherein an edge of the processing groove is formed sharply. In a forging machine that processes workpieces by forging,
A vibrating die having a processing groove for processing the workpiece into a predetermined shape and vibrating at least in a direction substantially perpendicular to the longitudinal direction of the workpiece and pressurizing the workpiece with the processing groove; A fixed die that has a processing groove for processing a workpiece into a predetermined shape and is disposed opposite to the vibration die,
At least one of the surface of the processing groove of the vibration die and the surface of the processing groove of the fixed die is formed in a grindstone shape.   The forging device according to claim 3, wherein at least one of the edge of the machining groove of the vibration die and the edge of the machining groove of the fixed die is formed sharply.   The forging device according to any one of claims 1 to 4, further comprising: a rotation mechanism that rotates the workpiece or the vibration die about an axis center of the workpiece.   The forging device according to claim 1, further comprising a vibration applying mechanism that ultrasonically vibrates the vibration die. In a forging machine that processes workpieces by forging,
It has a processing die for processing the workpiece into a predetermined shape, and includes a vibrating die that vibrates in at least a direction substantially perpendicular to the longitudinal direction of the workpiece and pressurizes the workpiece with the processing groove,
A forging device characterized in that unevenness capable of removing burrs generated on the surface of the workpiece pressed by the vibrating die is formed on the surface of the processing groove. In a forging machine that processes workpieces by forging,
A vibrating die having a processing groove for processing the workpiece into a predetermined shape and vibrating at least in a direction substantially perpendicular to the longitudinal direction of the workpiece and pressurizing the workpiece with the processing groove; A fixed die that has a processing groove for processing a workpiece into a predetermined shape and is disposed opposite to the vibration die,
At least one of the surface of the processing groove of the vibration die and the surface of the processing groove of the fixed die has unevenness capable of removing burrs generated on the surface of the workpiece pressed by the vibration die. A forging device that is formed. In the forging method to process the work piece by forging,
A vibrating die having a processing groove whose surface is formed in a grindstone shape is vibrated at least in a direction substantially orthogonal to the longitudinal direction of the workpiece, and the workpiece is pressed by the processing groove to forge the workpiece. A forging method comprising a pressurizing step. In the forging method to process the work piece by forging,
A vibrating die disposed opposite to a fixed die having a machining groove whose surface is formed in a grindstone shape is vibrated at least in a direction substantially perpendicular to the longitudinal direction of the workpiece, and the workpiece is pressurized with the machining groove. And a pressurizing step for forging the workpiece.   The forging method according to claim 9 or 10, wherein, in the pressurizing step, the workpiece is always rotated around the axis center of the workpiece as a rotation center.

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