JP3558654B2 - Curling molding die for turret punch press - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a curling forming method in a turret punch press for performing a curling forming process on a work, and a curling forming die used in the method.
[0002]
[Prior art]
Conventionally, as a curling forming method in a turret punch press for bending the end of a work into a curl shape, the applicant of the present invention has previously filed an application and is known as Japanese Patent Application Laid-Open No. 3-204124. In other words, in this forming method, the work is held horizontally by a turret punch press, and the upper and lower dies are cooperated to perform curling forming on the tip of the work in three steps. The molding die is indexed to the processing position, and the first and second steps of the first and second sections are bent by the molding die. After the bending of the second section is completed, the molding die is finished. After the upper mold is raised so as not to interfere with the work, another molding mold is selected from the turret, indexed to the processing position, and the third step of bending is performed.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional curling forming method described above, the forming dies for the first and second steps and the forming dies for the third step are separate and mounted on the turret of the turret punch press. When replacing with a normal punching die, it must be performed manually, and the space is restricted.
[0004]
Therefore, when performing the curling forming process, it is necessary to exchange the mold, and it takes time to exchange the mold, and the work efficiency of the turret punch press also deteriorates. In addition, there is a problem in that it is obstructive when other processing is performed, so that the die is replaced or processing is performed with poor workability.
[0005]
In addition, there is a limitation in terms of space, and there has been a problem that two molding dies must be used for three steps of processing.
[0006]
An object of the present invention is to improve the above problem by shortening the mold replacement time and improving workability by performing a three-step curling molding process with one molding die. An object of the present invention is to provide a curling mold in a turret punch press .
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the curling molding die for a turret punch press according to claim 1 is a curling molding die that can be freely attached to and detached from upper and lower turrets of the turret punch press, and is used as a pre-process for the curling molding. A first forming die for performing one-step bending and a second-step bending, and a second forming die for performing a third-step curling forming in addition to the first and second bending steps The punch body and the die body are provided on the integrated punch holder and the integrated die holder at a distance from each other, and the forming part of the rotary punch for forming the first forming die is vertically rotated. The gist is provided so as to be movable so as to avoid interference between the first bending step part of the bent work and the forming part of the rotary punch at the end of the second bending step. In .
[0008]
According to a second aspect of the present invention, there is provided a curling molding die for a turret punch press according to the first aspect, wherein the side wall of the punch holder and the side wall of the die holder are automatically exchanged. Are provided, and the first and second molding dies are provided so as to be automatically exchangeable .
[0010]
[Action]
By adopting the turret punch press forming die of the present invention, when performing the curling process on the work tip in three steps by the turret punch press, the first and second steps of the forming die mounted on the turret are performed. Is processed at the processing position, and the first section, which is the tip of the work in the first step, is bent by this molding die. Next, in the processing section for the first and second steps of the same molding die, a second section is bent in a second step at a position away from the front end of the work by a predetermined amount. Next, the third step bending is performed in the processing section for the third step of the same molding die mounted on the turret, and complete curling processing is performed.
[0011]
When the upper mold is raised when the second step is completed during the above-described bending step, a turning mold is provided below the upper forming mold in the bending section for the first and second steps. Thus, even if the work interferes with the tip of the mold, the mold can be released by rotating, and curling can be performed by a turret punch press, thereby improving productivity.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The upper and lower molds are mainly shown in the drawings, and a turret punch press embodying the present invention has a generally known configuration, and therefore, illustration and description are omitted.
[0013]
First, of the upper and lower molds, the upper mold will be described. The molding die is mounted on the turret in advance.
[0014]
Referring to FIGS. 1, 2 and 3, the upper molding die 1 is mounted at appropriate intervals on the circumference of an upper turret in a turret punch press (not shown), and has a rectangular shape instead of a circular shape. And a punch holder 3 is provided. In this punch holder 3, a punch-side processing part 5 for the first and second steps and a punch-side processing part 7 for the third step are housed.
[0015]
A punch body 9 is mounted on the front side of the punch holder 3 as the punch side processing section 5 for the first and second steps. A flange 11 is attached to an upper portion of the punch body 9 with, for example, a plurality of bolts 13 and the like, and a punch head 15 is attached to a protrusion 9T of the punch body 9 with, for example, a bolt 17 or the like.
[0016]
A key groove 19 is formed in an outer wall of the punch body 9 in a vertical direction, and a key 23 attached to the punch holder 3 with a plurality of bolts 21 is engaged with the key groove 19.
[0017]
A hole 25 is formed below the punch body 9 in a vertical direction from below. A pin 27 is mounted above the hole 25 in a direction perpendicular to FIG. A punch block 29 is attached to the lower end of the punch body 9 with bolts 31, and one end of a pin 33 is fixed to the punch block 29.
[0018]
A rotating punch 35 is rotatably mounted on the pin 33. A pin 37 is attached to an upper left portion of the rotary punch 35 in FIG. A hook of a bullet 39 is hung between the pin 37 and the pin 27.
[0019]
As the punch-side processing section 7 for the third step, a punch guide 41 is mounted on the rear side of the punch holder 3. A punch body 43 is mounted in the punch guide 41 so as to be vertically movable. A punch head 45 is integrated with an upper portion of the protrusion 43T of the punch body 43.
[0020]
An elastic machine 49 is interposed between the flange 47 provided on the upper part of the punch guide 41 and the punch head 45 by being urged upward. A forming portion 51 and a guide portion 53 are provided at the tip (lower end) of the punch body 43.
[0021]
A striker 55 provided on the upper frame of the turret punch press is selectively positioned above the punch heads 15 and 45 by, for example, a hydraulic cylinder. As shown in FIG. 2, a plurality of tapered pin holes 57 are formed in the punch holder 3, and the positioning pins provided on the upper turret of the turret punch press are engaged with the tapered pin holes 57. By being combined, the upper molding die 1 is positioned on the upper turret. Further, as shown in FIGS. 1 and 3, the side wall of the punch holder 3 is provided with an exchange hole 59 for exchanging the upper molding die 1 by an automatic die exchange device. For example, an exchange rod is mounted in the exchange hole 59, and the upper molding die 1 is detached from the upper turret.
[0022]
Referring to FIGS. 1, 4 and 5, the lower molding die 61 is mounted on the circumference of the lower turret at a position corresponding to the upper molding die 1 in a turret punch press (not shown). Similarly to the upper molding die 1, the shape is formed in a rectangular shape instead of a circular shape, and a die holder 63 is provided.
[0023]
The die holder 63 for the first and second steps and the third side 65 for the third step are located at positions corresponding to the punch-side sections 5 for the first and second steps and the punch-side sections 7 for the third step. The die side processing part 67 for the process is stored.
[0024]
As the die side processing portion 65 for the first and second steps, a die body 69 is mounted on the front side of a die holder 63 mounted on a lower turret. An ejector plate 71 is mounted on the die body 69 so as to be vertically movable. The ejector plate 71 is urged upward by the urging force of a urethane spring 73 inserted into the die body 69 to hold the work.
[0025]
As the die-side processing portion 67 for the third step, the die body 73 is mounted on the die holder 63, and the die body 73 is guided at a position corresponding to the guide portion 53 formed at the lower end of the punch body 43. A hole 75 is formed. Therefore, the guide portion 53 is inserted into the guide hole 75.
[0026]
Tapered pin holes 77 are formed on the left and right sides of the front side of the die holder 63. The tapered pin holes 77 are mounted on tapered pins provided in the lower turret, and the die holder 63 is positioned with respect to the lower turret. As shown in FIGS. 1 and 5, an exchange hole 79 for exchanging the lower molding die 61 by the automatic die exchange device is provided on the side wall of the die holder 63. For example, an exchange rod is attached to the exchange hole 79, and the lower molding die 61 is detached from the lower turret.
[0027]
Next, a description will be given of an operation of performing curling forming processing on the tip end of a work using the upper and lower forming dies 1 and 61 of the present embodiment.
[0028]
In Fig. 1, by placing the workpiece W on the ejector plate 71, and actuated with positioning the striker 55 upward punch head 15, by the rotation punch 35 and die body 69 in cooperation, 6 As described above, the bending of the first node 81 in the first step is performed on the tip end of the work W.
[0029]
Subsequently, the workpiece W is advanced by a predetermined amount, and the second node 83 is bent in the second step. After the bending operation of the second section 83 is completed, the rotary punch 35 is lifted. However, as shown in FIG. Although the rotation punch 35 interferes with the forming portion 35S, the rotation punch 35 rotates about the pin 33 as a rotation center against the repelling force of the elastic machine 39, so that the interference can be avoided. When the interference part escapes, the rotary punch 35 returns to the old position again by the pulling force of the elastic machine 39. Next, as shown in FIG. 8, when the striker 55 is positioned above the punch head 45 and the striker 55 is actuated, the punch body 43 and the die body 73 cooperate to form the punch body 43 at the forming portion 43S of the punch body 43. the third step curling molding rounding the tip of the workpiece W is performed by the can to the product.
[0030]
In this manner, the curling forming process in the first, second, and third steps can be performed by one forming die. Therefore, it is possible to shorten the time for exchanging the mold and to improve the work efficiency.
[0031]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.
[0032]
【The invention's effect】
As can be understood from the above description of the child embodiment, according to the present invention, since the configuration is as described in the claims, the first, second, and second moldings are performed by one molding die. A curling process including three steps can be performed. Therefore, it is possible to shorten the time for exchanging the mold and to improve the work efficiency.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a molding die for curling molding according to the present invention.
FIG. 2 is a plan view of an upper molding die in FIG.
FIG. 3 is a front view in FIG. 2;
FIG. 4 is a plan view of a lower molding die in FIG. 1;
FIG. 5 is a front view of FIG.
FIG. 6 is a side view showing a state where a first joint bending in a first step is performed on a tip end of a work;
FIG. 7 is a state diagram of the upper and lower forming dies after the second knot bending of the second step is performed on the tip of the work.
FIG. 8 is a diagram showing a state in which a third step of curling bending is performed on a work using upper and lower molding dies.
[Explanation of symbols]
Reference Signs List 1 Upper molding die 3 Punch holder 5 Punch side processing part 7 for first and second steps 7 Punch side processing part 9 for third step Punch body 15 Punch head 33 Pin 35 Rotating punch 43 Punch body 45 Punch head 61 Lower forming die 63 Die holder 65 Die processing part 67 for first and second steps Die processing part 69 for third step Die body 71 Ejector plate

Claims (2)

A first molding die that performs a bending process of a first step and a bending process of a second step as a pre-process of the curling process, as a curling mold that can be freely attached to and detached from upper and lower turrets of a turret punch press; In addition to the first and second bending steps, the punch body and the die body of the second molding die for performing the curling forming process of the third step are separated back and forth between the integrated punch holder and the integrated die holder. And a forming part of a rotary punch for forming the first forming die is provided so as to be rotatable in a vertical direction. At the end of the second bending step, the first part of the bent work is removed. A curling forming die for a turret punch press, which is provided so as to avoid interference between a bending process section and a forming section of the rotary punch . The curling molding die for a turret punch press according to claim 1, wherein a replacement hole used by a die automatic exchange device is provided on a side wall of the punch holder and a side wall of the die holder, respectively, and the first molding die and A curling molding die for a turret punch press, wherein the second molding die is provided so as to be automatically exchangeable .

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