JP4913400B2 - Punch mold - Google Patents

Description

  The present invention relates to a punch mold, and more particularly to a punch mold that can supply a lubricant such as oil mist to a sliding portion of the punch mold.

  Conventionally, in a punching press (for example, a turret punch press) mold (punch mold) that is supported by a punch holder so as to be movable up and down, a communication hole that can communicate with an oil hole provided in the punch body is provided in the punch guide. A punching press mold is known in which a circumferential groove communicating with the communication hole is provided on the outer peripheral surface of the punch guide (see, for example, Patent Document 1).

When punching is performed, oil or the like is supplied to the part of the workpiece to be punched or the part of the punch mold to slide through the oil hole or the like to facilitate punching. The body is prevented from being worn.
Japanese Utility Model Publication No. 3-24321

  By the way, in the punch mold, the oil hole needs to be provided in the punch body in an elongated manner, and therefore a special machine tool such as a gun drill is required to process the oil hole.

  Also, if the accuracy of the upper surface of the punch body (the end opposite to the side where the punch guide is provided) (perpendicularity to the side surface of the punch body) is poor, Since the oil hole is bent when the hole is processed, it is necessary to improve the accuracy of the upper surface in order to prevent the bending.

  That is, the conventional punch mold has a problem that it is difficult to manufacture because the oil hole needs to be formed long and narrow.

  The present invention has been made in view of the above problems, and includes a punch guide and a punch body that is slidably engaged with the punch guide, and supplies lubricant from the outside. And at least one of a sliding part between the punch guide and the punch body, a part for punching a workpiece, and a sliding part between the punch guide and a punch holder (for example, a turret) where the punch guide is installed. An object of the present invention is to provide a punch mold that can be easily manufactured as a punch mold capable of supplying the lubricant to such a portion.

The invention according to claim 1 is a cylindrical punch guide, a columnar punch body whose one end side is slidably engaged with the punch guide in the punch guide, A punch head provided on the other end side, a stripper spring elastically mounted between the punch guide and the punch head, a lubricant introducing portion provided in the other end of the punch body and in the vicinity thereof, The punch body and the stripper spring on the other end side of the punch body so as to form an annular supply path for supplying the lubricant introduced by the lubricant introduction portion to a predetermined portion. possess a circular cylindrical sleeve which is provided between the cylindrical punch body is fitted vertically movably in the cylindrical punch guide, the punch guide upper portion of the annular retainer There is a collar, the cylindrical sleeve is screwed and fixed to the upper end of the punch body penetrating the retainer collar, the lubricant introducing portion is at the top of the punch body, and the lubricant introducing portion is the sleeve And a cylindrical supply passage between the punch guide and the punch body, and a lubricant is introduced between the punch guide and the punch body, and a lower end portion of the sleeve is fitted into the retainer collar. Punch mold.

  According to a second aspect of the present invention, in the punch die according to the first aspect, the lubricant introducing portion is a punch die that is a hole having a length that can be processed by a general-purpose drilling machine or a general-purpose lathe. is there.

  A third aspect of the present invention is the punch mold according to the first aspect, wherein the lubricant introducing portion is a groove provided in an outer peripheral portion of the punch body.

  According to a fourth aspect of the present invention, in the punch die according to the third aspect, the punch head is screwed into the punch body, and a groove constituting the lubricant introducing portion is formed on the punch head. It is a punch die which is a groove for engaging a locking piece for rotation prevention.

The invention according to claim 5, claim 1 in punch tool according to any one of claims 4, punch tool of said punch head and the circular cylindrical sleeve is formed integrally It is a type.

  According to the present invention, a punch guide and a punch body that is slidably engaged with the punch guide are provided, and the punch guide and the punch body are supplied with a lubricant from the outside. Punch mold capable of supplying the lubricant to at least any one of the following: a sliding portion with the punch, a portion for punching the workpiece, and a sliding portion between the punch guide and the turret where the punch guide is installed In this case, it is possible to provide a punch mold that can be easily manufactured.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a schematic configuration of a punch die 101 according to the first embodiment of the present invention, FIG. 2 is an enlarged view of a portion II in FIG. 1, and FIG. It is a figure which shows the III-III cross section.

  The punch die 101 is used by being mounted on the upper turret 103 of the turret punch press, for example, and works with a die (not shown) facing the punch die 101 to punch a workpiece. It is to be processed.

  The punch die 101 includes a cylindrical punch guide 105 and a punch body 107 that is slidably engaged with the punch guide 105. The punch body 107 is formed in a columnar shape, and one end side (lower side in FIG. 1) of this axial direction (longitudinal direction; vertical direction in the figure) is located in the punch guide 105, and the punch guide It is slidable and movable in the axial direction with respect to 105.

  A punch head 109 is integrally provided at the other axial end of the punch body 107 (upper side in FIG. 1), and a coil spring is formed between the punch guide 105 and the punch head 109, for example. A stripper spring 111 is mounted. The stripper spring 111 is provided outside the punch body 107 so as to surround the other end side of the punch body 107, and the punch body 107 is disposed on the punch head 109 side with respect to the punch guide 105 in the axial direction (see FIG. 1 is moved upward (in a direction protruding from the punch guide 105).

  When the punch die 101 installed on the upper turret 103 is pressed downward in FIG. 1 by the punch striker 114 of the turret punch press, first, between the flange portion 115 of the punch guide 105 and the upper turret 103. Is compressed, the punch guide 105 and the punch body 107 are integrally moved downward with respect to the upper turret 103, and then the stripper spring 111 is compressed. At the same time, the punch body 107 moves downward with respect to the punch guide 105 to perform punching.

  A lubricant introduction portion 113 is provided at the other end of the punch body 107 (upper part of FIG. 1) and in the vicinity thereof. The lubricant introduction portion 113 is supplied from a lubricant supply device (not shown) provided outside the punch mold 101 to a predetermined portion (a sliding portion between the punch body 107 and the punch guide 105, the punch guide 105). Provided to supply a lubricant (for example, oil mist) to a sliding part between the upper turret 103 and at least one of the parts punched (sheared or plastically processed) on the workpiece by the punch body 107. It is what has been.

  The lubricant introduction portion 113 is provided from the other end portion of the punch body 107 to the vicinity thereof so that one end portion of the introduction portion 113 is connected to the lubricant supply device. For example, the lubricant introduction portion 113 includes an elongated hole 119 that is opened from the surface of the other end of the punch body 107 toward one end (downward) of the punch body 107, and a hole 121 that communicates with the hole. It is comprised by.

  The hole 119 is short and has a length that can be processed by a general-purpose drilling machine or a general-purpose lathe without using a special machine tool such as a gun drill. The hole 121 is provided near the bottom of the hole 119, and connects the hole 119 and the outer peripheral surface of the punch body 107.

  The punch striker 114 is provided with a supply path 123 for supplying the lubricant. When the punch striker 114 is in contact with the punch head 109 as shown in FIG. The lubricant is supplied from the lubricant supply device to the outer peripheral surface of the punch body 107 (a supply path 127 described later) through the supply path 123, the hole 119, and the hole 121. It can be supplied.

  An elongated cylindrical sleeve 125 is provided integrally with the punch head 109 on the other end side of the punch body 107. The sleeve 125 is provided between the punch body 107 and the stripper spring 111 in the radial direction of the punch body 107, and the inner diameter of the sleeve 125 is larger than the outer diameter on the other end side of the punch body 107. Is smaller than the inner diameter of the stripper spring 111. Since the sleeve 125 is provided, a cylindrical supply passage 127 for supplying the lubricant introduced by the lubricant introduction portion 113 to the predetermined portion is provided between the punch body 107 and the sleeve 125. Is formed.

  Here, the punch mold 101 will be described in more detail.

One end side of the punch body 107 is composed of a punch body blade portion 132. Further, the outer diameter of the punch body 107 on one end side is slightly larger than the outer diameter on the other end side, and the enlarged one end side portion engages with the punch guide 105 and becomes narrower. A stripper spring 111 and a punch head 109 (sleeve 125) are provided at the other end side portion.

  The above-described flange portion 115 is provided at the upper end portion of the punch guide 105. An annular retainer collar 129 is fitted and provided on the upper side of the flange portion 115.

  A male screw portion 131 is formed on the outer periphery from the upper end portion of the punch body 107 to the vicinity thereof. The male screw portion 131 has a portion (from the upper end portion of the punch head 109 (sleeve 125) to the vicinity thereof ( The inner peripheral part) is screwed together. In this way, the punch head 109 (sleeve 125) is provided integrally with the punch body 107, and the upper end portion of the supply path 127 formed between the punch body 107 and the sleeve 125 is closed. Yes.

  Further, when the punch body 109 is grounded by the punch head 109 being screwed into the male screw portion 131 and the overall length of the punch body 107 is shortened, the position of the punch body 107 with respect to the punch head 109 is adjusted. Can be done.

  The punch head 109 includes an annular punch head member 133 and a sleeve 125. The upper end portion of the sleeve 125 (in the vicinity of the punch head member 133) penetrates the sleeve 125 in the radial direction and has a male screw portion 131. A punch body fastening member 135 is provided, and an annular spring seat 137 is provided on the outer periphery of the punch body fastening member 135. The punch head member 133 and the upper end portion of the sleeve 125 are connected to each other as described above. As shown in FIG.

  The upper end of the punch head member 133 is positioned slightly above the upper end of the punch body 107. Therefore, the punch striker 114 is in contact with the punch head member 133, not the punch body 107.

  The outer periphery of the punch body tightening member 135 is formed into a truncated cone side surface shape whose upper side is thicker than the lower side, and a spring seat 137 having an inner peripheral part of the truncated cone is engaged with the punch body tightening member 135. . Further, since the stripper spring 111 is provided between the retainer collar 129 provided on the upper side of the flange portion 115 and the spring seat 137, it is elastically mounted as described above.

  Below the lower end portion of the sleeve 125, a space 139 surrounded by the retainer collar 129, a portion on the upper end side of the punch guide 105 and the central portion in the axial direction of the punch body 107 is formed. 127, the space 139 also forms a lubricant supply path.

  Further, since the outer periphery of the sleeve 125 near the lower end is fitted to the inner periphery of the retainer collar 129 via a retaining ring 145, the punch head 109 (sleeve 125), the retainer collar 129, and the stripper spring 111 are integrated. Unitized.

  More specifically, the retainer collar 129 is a stopper provided on the inner periphery of each of the retainer collars 141, 143 between the stripper spring side retainer collar 141, the punch guide side retainer collar 143, and the retainer collars 141, 143. The stopper ring 145 functions as a stopper that prevents the punch head 109 (sleeve 125) from coming out of the retainer collar 129 upward in FIG.

  Further, a locking member 147 is provided between the retainer collar 129 and the punch guide 105, whereby the retainer collar 129 and the punch guide 105 are fixed.

  In addition, when the punch die 101 is pressed and the punch body 107 and the sleeve 125 move with respect to the retainer collar 129, the small diameter portion 151 for avoiding interference between the retaining ring 145 and the sleeve 125 is provided at the lower end of the sleeve 125. As described above, the sleeve 125 and the retainer collar 129 are fitted at the retaining ring 145 and the lower end portion of the small diameter portion 151.

  A groove 153 extending in the axial direction of the punch body 107 and a groove 154 extending in the circumferential direction of the punch body 107 are formed on the outer periphery on the one end side of the punch body 107 (the outer periphery of the portion engaged with the punch guide 105). The punch guide 105 is provided with a through hole 155 communicating with the groove 153. Through these grooves 153 and through-holes 155, the lubricant supplied up to the space 139 is supplied up to the predetermined part.

  According to the punch die 101, the long supply path 127 of the lubricant is formed between the sleeve 125 and the punch body 107. Therefore, when the punch die 101 is manufactured, an elongated hole is formed using a gun drill or the like. It is not necessary to drill, and the accuracy of the surface of the upper portion of the punch body 107 (the end opposite to the side where the punch guide 105 is provided) (the surface where the hole 119 starts to be drilled) (the side surface of the punch body 107) Therefore, the punch mold 101 can be easily manufactured.

[Second Embodiment]
4 is a cross-sectional view showing a schematic configuration of a punch die 101a according to a second embodiment of the present invention, FIG. 5 is a view showing a VV cross section in FIG. 4, and FIG. 4 is a view showing a VI-VI cross section in FIG.

  The punch die 101a according to the second embodiment is configured substantially in the same manner as the punch die 101 according to the first embodiment except for the form of the lubricant introduction portion 113 and the like, and has substantially the same effect.

  That is, the lubricant introduction portion 113 of the punch die 101 a is configured by a groove (groove that can be processed by end milling or the like) 201 provided on the outer peripheral portion of the punch body 107.

  As will be described in detail later, the groove 201 is a groove for engaging a lock piece 39 for preventing rotation of the punch head 109 a screwed into the punch body 107.

  Here, the punch mold 101a will be described mainly with respect to differences from the punch mold 101 according to the first embodiment.

  The punch head member 23 of the punch head 109 a is screwed into the punch body 107. In order to prevent rotation after the punch head 23 is screwed into the male thread portion 131 of the punch body 107, the punch mold 101a is provided with a screw rotation prevention device.

  More specifically, the punch head member 23 has a plurality of lock pieces 39 whose inner end portions can be engaged with a plurality of longitudinal grooves 201 (see FIG. 5) formed in the male thread portion 131 of the punch body 107. It is provided to be movable in the radial direction (radial direction). The lock piece 39 is urged inward by a lock piece urging means 41 such as a coil spring built in the punch head member 23.

  On the outer peripheral surface of the punch head member 23, a lock ring 43 whose upper surface is slightly lower than the upper surface 23B of the punch head member 23 is rotatably provided. The inner peripheral surface of the lock ring 43 is provided with a plurality of movement restricting portions 45 that are in contact with the outer end portion of the lock piece 39 and restrict the movement of the lock piece 39 in the outward direction. Movement permitting portions 47 that allow the lock pieces 39 to move outward are provided between the movement restricting portions 45 at equal intervals.

  The movement restricting portion 45 provided in the lock ring 43 is in a position facing the outer end portion of the lock piece 39 when the inner end portion of the lock piece 39 is engaged with the groove 201 of the male screw portion 131. It is a part that regulates the outward movement of the lock piece 39 and is provided at equal intervals in the circumferential direction. When the movement allowing portion 47 provided in the lock ring 43 is located at a position facing the outer end portion of the lock piece 39, the lock piece 39 is arranged so that the inner end portion of the lock piece 39 can be detached from the groove 201. These portions are allowed to move in the outward direction and are arranged at regular intervals in the circumferential direction and between the movement restricting portions 45. In the present embodiment, the outer end portion of the lock piece 39 is illustrated as a through hole that can enter. However, the movement permitting portion 47 is not limited to the through hole, and may be configured such that a recess is formed on the inner peripheral surface of the lock ring 43.

  The screw detent device is provided with a fixed position holding means 49 for holding the movement restricting portion 45 of the lock ring 43 at a fixed position that always faces the lock piece 39 and restricts the outward movement. Further, the screw detent device includes a fixed position return means 51 (see FIG. 6) for automatically returning the lock ring 43 to the fixed position when the lock ring 43 is rotated with respect to the punch head member 23. ) Is provided.

  More specifically, the fixed position holding means 49 is a direction in which an engagement piece 55 such as a ball engageable with an engagement recess 53 formed on the inner peripheral surface of the lock ring 43 is engaged with the engagement recess 53. It is composed of a locking means 57 such as a ball plunger that is biased toward the bottom. In addition, although the case where the said locking means 57 is provided in the punch head member 23 is illustrated, the location which provides the engaging recessed part 53 and the locking means 57 is relative, and it engages with the outer peripheral surface of the punch head member 23 It is also possible to form the concave portion 53 and provide the lock ring 43 with the locking means 57.

  When the engagement piece 55 of the lock means 57 is engaged with the engagement recess 53, the inner end portion of the lock piece 39 is engaged with the groove 201 of the male screw portion 131 as shown in FIG. Accordingly, the outer end portion of the lock piece 39 and the movement restricting portion 45 of the lock ring 43 face each other, and the movement of the lock piece 39 in the outward direction is restricted. That is, the punch head member 23 is fixed to the male screw portion 131 of the punch body 107 and the screw portion is prevented from rotating.

Fixed position returning means 51 includes a first elastic member 59A such as such as a spring that biases the lock ring 43 in the clockwise direction (forward rotation direction) with respect to the punch head member 23, the counterclockwise direction the lock ring 43 it is made of a second elastic member 59B which is urged in (reverse rotation direction).

  The first and second elastic members 59A and 59B are housed in an outer peripheral groove 23C (see FIG. 4) formed on the outer peripheral surface of the punch head member 23, and the first and second elastic members 59A and 59B. One end surfaces (opposing surfaces) that face each other are in contact with a regulation pin 61 (see FIG. 6) that projects from the inner peripheral surface of the lock ring 43. The other end surfaces of the first and second elastic members 59A and 59B are in contact with fixing pins 63A and 63B that protrude outward from the punch head member 23 and are spaced apart from each other.

  In order to restrict the rotation of the lock ring 43 with respect to the punch head member 23, the lock ring 43 has both fixing pins 63 </ b> A and 63 </ b> B when the lock ring 43 is rotated in the clockwise direction and the counterclockwise direction. A stopper pin 65 that can be freely contacted is provided.

  In the configuration as described above, the punch die 101a is used by attaching the punch guide 105 to a punch holder (for example, the upper turret 103) in the punch press so that the punch guide 105 can be moved up and down. The upper surface 23B of the punch head 109a is struck by the provided ram (punch striker 114). At this time, since the upper surface of the lock ring 43 is provided lower than the upper surface 23B of the punch head 109a, the lock ring 43 is not directly pressed by the striker. Therefore, the lock ring 43 is not subjected to deformation or the like, and can always be favorably rotated with respect to the punch head member 23.

  When the punch blade portion is worn by use of the punch die 101a, the punch die 101a is taken out from the punch holder of the punch press, the punch body 107 is removed from the punch guide 105, and the blade portion of the punch body 107 is re-polished. It is. When the blade portion is repolished and the overall length of the punch body 107 is shortened, the position of the punch body 107 with respect to the punch head 109a is adjusted.

  At that time, when the positions of the punch head 109a and the punch body 107 are adjusted, it is necessary to release the fixed state in the detent device. Therefore, the following operations are performed to adjust the position.

  As shown in FIG. 5A, the inner end portion of the lock piece 39 engages with the groove 201 of the male screw portion 131, and the movement restricting portion 45 of the lock ring 43 restricts the movement of the lock piece 39 in the outward direction. The state in which the engagement piece 55 provided in the fixed position holding means 49 is engaged with the engagement recess 53 of the lock ring 43 is a state in which the punch body 107 and the punch head 109a are integrally fixed. At this time, as shown in FIG. 6A, the first and second elastic members 59A and 59B are substantially equal in length, and the lock ring 43 is substantially equal in the clockwise direction and the counterclockwise direction. It is energized by force.

  Therefore, the punch head member 23 and the punch body 107 are in a locked state in which relative rotation is impossible, that is, a rotation prevention state.

As described above, when the anti-rotation state is present, when the lock ring 43 is gripped and the lock ring 43 is rotated clockwise with respect to the punch head member 23 as shown in FIG. 1 of the elastic member 59A is extended, the second elastic member 59B is compressed deflated. Then, when the stopper pin 65 provided in the lock ring 43 comes into contact with the one fixing pin 63A, the clockwise rotation is restricted.

As described earlier, when the stopper pin 65 is brought into contact with one of the fixed pins 63A, as shown in FIG. 5 (B), with the outer end portion and the locking ring 43 of the locking piece 39 provided in the punch head member 23 moves The allowing portion 47 faces and the lock piece 39 is movable outward.

  Accordingly, when the stopper pin 65 is in contact with the one fixing pin 63A, the inner end portion of the lock piece 39 is detached from the groove 201 of the male screw portion 131.

  Therefore, the punch head 109a can be rotated clockwise with respect to the punch body 107, and the screwing state between the punch body 107 and the punch head 109a can be adjusted.

  When the lock ring 43 is released after the inner end portion of the lock piece 39 is engaged with the groove 201 at an appropriate position, the compressed second elastic member 59B is extended, so that the lock ring 43 is counterclockwise. It is automatically rotated in the turning direction. That is, the lock ring 43 is automatically rotated and returned to the initial fixed position shown in FIG. That is, a state in which the punch head member 23 is fixed to the punch body 107 so as not to rotate is automatically obtained.

  When the punch head 109a is rotated counterclockwise with respect to the punch body 107, the operation according to the above-described operation is performed. Therefore, the punch head 109a is rotated counterclockwise. Description of is omitted.

  As understood from the above description, the punch head 109a is rotated clockwise or counterclockwise with respect to the punch body 107 to adjust the screwed state of the punch body 107 and the punch head 109a. Sometimes it can be adjusted easily without the use of tools.

  After the screwing state is adjusted, the punch body 107 and the punch head 109a are automatically held in a fixed state in which relative rotation between the punch body 107 and the punch head 109a is impossible. Can be easily locked.

  Meanwhile, in the punch die 101a, the punch head member 23, the punch body fastening member 135, the spring seat 137, and the sleeve 125 shown in FIG. 4 may be integrally formed. That is, as shown in FIG. 7, the portions of the punch head member 23b and the sleeve 125b may be formed integrally with a machine tool such as a lathe by cutting out from the material or integrally formed by welding. Further, the punch die 101 may have the same configuration.

  According to the punch die 101a, since the lubricant introduction portion 113 is formed by the groove 201 provided in the outer peripheral portion of the punch body 107, there is no need to make a long and narrow hole using a gun drill or the like. 101a is easy to manufacture. Further, since the lubricant introduction portion 113 is configured by the groove 201, the elongated groove 201 is formed using, for example, a general-purpose milling machine or the like without using a special machine tool as in the case of making an elongated hole. The punch mold 101a can be easily manufactured regardless of the form (length, etc.) of the lubricant introduction portion 113.

Further, according to the punch die 101a, the groove 201 constituting the lubricant introduction portion 113 is also used as a groove with which the lock piece 39 for preventing rotation of the punch head 109a is engaged. It is not necessary to provide a separate groove for forming the punch die 101. Therefore, the punch mold 101a has a simple structure and is easy to manufacture.

  Each of the punch dies 101 and 101a includes a punch guide and a punch body that is slidably engaged with the punch guide and receives supply of lubricant from the outside. Of the sliding portion between the punch guide and the punch body, the portion for punching the workpiece (shearing, plastic deformation processing, etc.), and the sliding portion between the punch guide and the turret where the punch guide is installed. In a punch mold capable of supplying the lubricant to at least one part, so as to cover at least a part of the punch body separately from the stripper spring at a part other than the part engaged with the punch guide A cylindrical sleeve provided (a sleeve provided integrally with the punch head and moved together with the punch body during punching); Using a feed passage formed between the serial punch body, it is an example of a punch tool configured to perform the supply of the lubricant.

FIG. 1 is a cross-sectional view showing a schematic configuration of a punch die according to the first embodiment of the present invention. FIG. 2 is an enlarged view of a portion II in FIG. FIG. 3 is a view showing a section taken along the line III-III in FIG. FIG. 4 is a cross-sectional view showing a schematic configuration of a punch mold according to the second embodiment of the present invention. FIG. 5 is a view showing a VV cross section in FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. It is a figure which shows the modification of a punch metal mold | die.

Explanation of symbols

101,101a punch 105 punch guide 107 punch body 109, 109 a path Nchiheddo 111 stripper spring 113 lubricant inlet portion 19, 12 hole 201 groove

Claims (5)

A cylindrical punch guide;
A cylindrical punch body having one end side slidably engaged with the punch guide in the punch guide;
A punch head provided on the other end side of the punch body;
A stripper spring mounted between the punch guide and the punch head;
A lubricant introduction portion provided in the other end portion of the punch body and in the vicinity thereof;
Between the punch body and the stripper spring on the other end side of the punch body so as to form an annular supply path for supplying the lubricant introduced by the lubricant introduction portion to a predetermined portion. a circular cylindrical sleeve provided;
Have a, the cylindrical punch body to said cylindrical punch guide is fitted vertically movably, the there is a punch guide annular retainer collar at the top, of the punch body passing through the retainer collar The cylindrical sleeve is screwed and fixed to the upper end, and the lubricant introduction portion is at the top of the punch body, and the lubricant introduction portion is connected to the cylindrical supply path between the sleeve and the punch body. communicating, as well as introducing a lubricant between the punch guide and the punch body, a punch die lower end of the sleeve is characterized that you have fitted into the retainer within the collar. In the punch die according to claim 1,
The punch mold, wherein the lubricant introduction part is a hole having a length that can be machined by a general-purpose drilling machine or a general-purpose lathe. In the punch die according to claim 1,
The punch mold according to claim 1, wherein the lubricant introducing portion is a groove provided in an outer peripheral portion of the punch body. The punch die according to claim 3,
The punch head is screwed into the punch body, and the groove constituting the lubricant introduction portion is a groove for engaging a lock piece for preventing rotation of the punch head. Punch mold. In the punch die according to any one of claims 1 to 4 ,
Punch die and said punch head and the circular cylindrical sleeve is characterized by being configured integrally.

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