JP2004167534A - Structure and method for fitting press-forming die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide structure and a method for fitting a press-forming die by which workability and safety are improved. <P>SOLUTION: By embedding a integral screw 7 in the peripheral wall of a columnar cam 5, a connecting member 9 is preliminarily mounted to the columnar cam 5 by screwing the screw part 10 of the connecting member 9 into the tapped hole 8 of the integral screw 7 and a handle 22 is installed on the columnar cam 5 by connecting an insert rod 11 to the columnar cam 5 through the connecting member 9 with one operation when fitting the columnar cam 5 to a supporting die 6. By constitution like this, the workability and safety when fitting the press-forming die are improved. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rubbing structure of a press-molding die and a rubbing method of a press-molding die, and more particularly, to a rubbing structure of a press-forming die provided with a cylindrical cam having a peripheral wall formed with a negative angle forming surface and a rubbing structure. The present invention relates to a method of rubbing a press molding die.
[0002]
[Prior art]
2. Description of the Related Art In general, a press-molding die is known which includes a slide cam that slides and displaces inward via a cam mechanism by press-forming pressure. When this slide cam is newly used, the sliding portions are rubbed in advance (for example, see Patent Document 1). Some of such press-molding dies include a cylindrical cam that is formed in a substantially cylindrical shape and whose outer cylindrical surface is slidably supported. The slide cam is linearly moved toward the cylindrical cam. A negative angle forming part which forms a negative angle when moving and abutting the two to form is formed. In this press molding die, a negative angle is formed on the work by the negative angle forming part, and after the formation, the slide cam is retracted, and the cylindrical cam is rotated in a required direction, whereby the work can be die-cut. It becomes possible. Similar to the slide cam, the cylindrical cam needs to be rubbed in advance when newly used.
[0003]
Conventionally, in order to rub cylindrical cams, a hole is provided at a predetermined position on the peripheral wall at the time of casting of the cylindrical cam, and a round bar inserted into the hole is reciprocated around the axis of the cylindrical cam. Was working. However, since the hole for inserting the round bar into the cylindrical cam is machined, the number of steps is increased and the manufacturing cost of the cylindrical cam is increased. Further, since the hole is located at a deep position, the visibility of the hole is low when a round bar is inserted into the hole, thereby impeding the workability. Further, the hole of the columnar cam was dug out with a round bar, or the round bar was unexpectedly pulled out of the hole, resulting in extremely poor workability and safety problems.
[0004]
[Patent Document 1]
JP-A-5-60623 (paragraphs 0005 to 0009, FIG. 2)
[0005]
[Problems to be solved by the invention]
Therefore, the present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a rubbing structure of a press molding die capable of improving workability and safety. A second object is to provide a method of rubbing a press-molding die, which can improve workability and safety.
[0006]
[Means for Solving the Problems]
In order to achieve the first object, according to the first aspect of the present invention, the second mold is moved in a linear direction toward the first mold, and the two molds are abutted and formed. The first mold has a cylindrical cam having a substantially cylindrical shape and a negative angle forming surface engraved in the peripheral wall axial direction, and an outer cylindrical surface of the cylindrical cam. A press-molding die rubbing structure comprising a support die slidably supported, wherein a cast screw embedded in a cylindrical cam and having a screw hole formed therein, and a screw hole formed in the screw hole of the cast screw. And a handle provided at the tip with a matable screw portion.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the handle is formed by being divided into a connecting member having a threaded portion and a plug, and the connecting member and the plug are connected with one touch. It is characterized by that.
[0008]
According to a third aspect of the present invention, in the second aspect of the present invention, the connecting member is provided with a connecting shaft formed coaxially with the screw portion, and the leading end surface of the insertion rod is engaged with the connecting shaft. A possible connection hole is provided, and a protrusion protruding from the side surface of the connection shaft is inserted into a substantially L-shaped groove formed on the peripheral wall of the connection hole and having one end opened, so that the connection member and the insertion rod are connected. It is characterized by being connected by one touch.
[0009]
In order to achieve the second object, the invention according to claim 4 of the present invention is that the second mold is moved in a linear direction toward the first mold, and the two are abutted and formed. The first mold has a cylindrical cam having a substantially cylindrical shape and a negative angle forming surface engraved in the peripheral wall axial direction, and an outer cylindrical surface of the cylindrical cam. A method of rubbing a press-molding die comprising a support die slidably supported, wherein a screw portion provided at a tip of a handle is screwed into a cast screw embedded in a cylindrical cam. The handle is connected to the cylindrical cam, and the handle connected to the cylindrical cam is operated to rub the cylindrical cam with the support die.
[0010]
According to a fifth aspect of the present invention, in the invention of the fourth aspect, the handle is divided into a connecting member having a threaded portion and an insertion rod, and the threaded portion of the connecting member is formed in a cylindrical shape. The screw is screwed into the casting screw of the cam, and then the protrusion protruding from the side surface of the connecting member is inserted into a substantially L-shaped groove provided on the peripheral wall of the distal end surface of the connecting rod to connect the connecting member and the connecting rod. Are connected with one touch.
[0011]
Therefore, according to the first aspect of the present invention, the handle can be connected to the cylindrical cam by screwing the screw portion provided at the tip of the handle into the screw hole of the cast screw of the cylindrical cam.
[0012]
In the invention according to claim 2, the screw portion of the connecting member is screwed into the screw hole of the casting screw of the cylindrical cam in advance, so that the connecting member and the insertion rod are connected with one touch to form the cylindrical cam. Handles can be connected.
[0013]
According to the third aspect of the present invention, the protrusion protruding from the side surface of the connection shaft is inserted into the substantially L-shaped groove formed on the peripheral wall of the connection hole to connect the connection member and the insertion rod with one touch. be able to.
[0014]
According to the fourth aspect of the present invention, the handle provided at the tip of the handle is screwed into a cast screw embedded in the columnar cam to connect the handle to the columnar cam. By operating, the cylindrical cam and the support die are rubbed.
[0015]
According to the fifth aspect of the present invention, the screw portion of the connecting member is screwed in advance with the cast screw of the cylindrical cam, and the protrusion protruding from the side surface of the connecting shaft is formed in a substantially L-shape formed on the peripheral wall of the connecting hole. And the connecting member and the insertion rod are connected with one touch by inserting the connecting member into the groove.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIGS. 1 and 2, the second mold 2 is moved toward the first mold 1 in a linear direction (to the left as viewed in the drawing in FIGS. 1 and 2), and both are moved. A rubbing structure of a press-molding die having a molding portion 3 having a negative angle when abutting and molding, particularly a circle having a substantially cylindrical shape and a negative-angle molding surface 4 engraved in the axial direction of the peripheral wall. When the column cam 5 and the support die 6 slidably supporting the outer cylindrical surface 5a of the column cam 5 are rubbed together, the handle 22 is attached to the column cam 5 when the first die 1 is rubbed. This is a press-molding die structure for installation, in which a casting screw 7 is buried in the peripheral wall of the cylindrical cam 5, and as shown in FIGS. First, the screw portion 10 of the connecting member 9 is screwed into the screw hole 8 of the casting screw 7. Te, in advance in the cylindrical cam 5 is mounted a connecting member 9, via a coupling member 9 is installed a handle 22 to the cylindrical cam 5 by connecting the plug rod 11 one-touch cylindrical cam 5. By operating the handle 22 as required, the cylindrical cam 5 is repeatedly rotated, and the outer cylindrical surface 5a of the cylindrical cam 5 and the support surface 6a of the support die 6 are rubbed.
[0017]
FIG. 1 shows a press-molding die in a state where the press-forming machine is located at the bottom dead center and the negative-angle forming portion 3 is formed to form a negative-angle portion on the work 12. In this state, with the cylindrical cam 5 positioned at a predetermined angle phase with respect to the support die 6, the presser die 15 is lowered to abut the cylindrical cam 5 and the support die 6, and the slide cam 13 A negative angle forming part 3 is formed by abutting the forming part 14 provided opposite to the columnar cam 5 against the columnar cam 5, thereby forming a negative angle part on the work 12. . The second mold 2 includes a slide cam 13 and a molding portion 14. FIG. 2 shows the press molding die in a state where the press molding machine is located at the top dead center and immediately before the work 12 is removed from the die. In this state, the presser die 15 is raised and retracted upward, and the second die 2 is moved in a straight line direction (rightward as viewed in the drawing in FIG. 2) to be in contact with the first die 1 (the cylindrical cam 5). The workpiece 12 is taken out of the mold by separating the second mold 2 (forming portion 14) from the second mold 2 and rotating the cylindrical cam 5 counterclockwise around the axis in this state to position it at a predetermined angle phase. The structure is made possible.
[0018]
As shown in FIG. 3, the cylindrical cam 5 has a casting screw 7 embedded at a predetermined position of the peripheral wall at the same time as the cylindrical cam 5 is cast. As shown in FIG. 4, the connecting member 9 includes a screw portion 10 that can be screwed into the screw hole 8 of the casting screw 7 and a connecting shaft 16 connected to the insertion rod 11 via a flange 17. The connection shaft 16 is formed with a projection 21 at a predetermined position on the side surface. The handle 22 is divided into a connecting member 9 previously mounted on the cylindrical cam 5 and a plug 11, and the distal end of the plug 11 is engaged with the connecting shaft 16 of the connecting member 9. A substantially cylindrical connecting part 18 having a possible connecting hole 19 formed on an end face is provided. Further, the connecting portion 18 is provided with a substantially L-shaped groove 20 having one end opened on the peripheral wall of the connecting hole 19. Then, in the rubbing structure of the press-molding die, as shown in FIG. 5, the screw portion 10 of the connecting member 9 is screwed into the screw hole 8 of the casting screw 7, and the connecting member 9 is mounted on the cylindrical cam 5. Then, as shown in FIG. 6, a projection 21 formed on the connecting shaft 16 of the connecting member 9 is inserted into a substantially L-shaped groove 20 formed on the connecting portion 18 of the insertion rod 11. The connecting shaft 16 is engaged with the connecting hole 19 so as to be inserted to the end, the insertion rod 11 is connected to the cylindrical cam 5 via the connecting member 9, and the handle 22 is installed on the cylindrical cam 5. Has become.
[0019]
Next, the operation of the present embodiment will be described. When the cylindrical cam 5 is newly used, it is necessary to rub the sliding surfaces 5a, 6a between the cylindrical cam 5 and the support die 6 in advance. At this time, first, as shown in FIG. 5, the screw portion 10 of the connecting member 9 is screwed into the screw hole 8 of the casting screw 7 of the cylindrical cam 5, and the connecting member 9 is attached to the cylindrical cam 5 in advance. . Next, as shown in FIG. 6, the connecting shaft 19 of the connecting member 9 mounted on the cylindrical cam 5 is engaged with the connecting hole 19 of the insertion rod 11 to insert the connecting cam 9 into the cylindrical cam 5 via the connecting member 9. The rod 11 is connected, and the handle 22 is installed on the cylindrical cam 5. At this time, the connection hole 19 is formed so that the projection 21 formed on the connection shaft 16 of the connection member 9 is inserted into the substantially L-shaped groove 20 formed in the connection portion 18 of the insertion rod 11 to the end of the groove 20. The connecting rod 16 can be connected to the cylindrical cam 5 with one touch by engaging the connecting shaft 16 with the connecting shaft 16. The handle 22 provided on the columnar cam 5 is operated as required to repeatedly rotate the columnar cam 5 with respect to the support die 6, so that the sliding surface 5a between the columnar cam 5 and the support die 6 is formed. , 6a can be rubbed against each other.
[0020]
This embodiment has the following effects.
Since the casting screw 7 is buried in the cylindrical cam 5, the machining of the hole for inserting a round bar into the cylindrical cam 5, which has been conventionally performed, is abolished, and the cylindrical cam 5, that is, the press forming die is not used. Manufacturing costs can be reduced.
The threaded portion 10 of the connecting member 9 is screwed into the screw hole 8 of the casting screw 7 of the cylindrical cam 5, and the connecting member 9 is mounted on the cylindrical cam 5. The connecting shaft 19 of the connecting member 9 is engaged with the connecting hole 19 provided on the end face of the connecting portion 18 at the tip of the connecting rod 11 to connect the connecting rod 11 to the cylindrical cam 5 via the connecting member 9. In addition, since the handle 22 is installed on the cylindrical cam 5, the workability is extremely good and the safety can be improved.
The cylindrical cam is formed through the connecting member 9 only by inserting the protrusion 21 provided on the side surface of the connecting shaft 16 of the connecting member 9 into the substantially L-shaped groove 20 formed in the peripheral wall of the connecting hole 19 of the connecting portion 18. Since the insertion rod 11 is connected to the cylindrical cam 5 and the handle 22 is installed on the cylindrical cam 5, the insertion rod 11 is connected to the cylindrical cam 5 with one touch and securely, and the handle 22 is installed on the cylindrical cam 5. Is possible, and workability and safety can be improved. In addition, by selecting the hole diameter of the screw hole 8 of the casting screw 7 and the screw diameter of the screw portion 10 of the connecting member 9 according to the use of the cylindrical cam 5, various specifications can be achieved by using the insertion rod 11 in common. It can correspond to the cylindrical cam 5.
[0021]
The embodiment is not limited to the above, and may be configured as follows, for example.
The screw hole 8 may be used for transporting the cylindrical cam 5 by mounting an eyebolt or the like on the cast screw 7 embedded in the cylindrical cam 5. In this case, it is desirable that the casting screw 7 is buried at the position of the center of gravity of the cylindrical cam 5. Further, a plurality of cast screws 7 may be embedded in one cylindrical cam 5.
Instead of inserting the projection 21 of the connecting shaft 16 of the connecting member 9 into the substantially L-shaped groove 20 of the connecting portion 18 of the connecting rod 11 to connect the inserting rod 11 and the connecting member 9, A plurality of balls protruding and retractable are equally arranged around the axis, and an annular groove centered on the axis is provided on the inner wall surface of the connection hole 19 of the connection portion 18 so that the connection member 9 and the connection portion 18 May be connected by a ball joint to connect the insertion rod 11 to the cylindrical cam 5.
[0022]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a rubbing structure of a press mold and a rubbing method of the press mold, which can improve workability and safety.
[Brief description of the drawings]
FIG. 1 is an explanatory view of the present embodiment, particularly showing a press-molding die in a state where a negative-angle forming portion is formed.
FIG. 2 is an explanatory view of the present embodiment, particularly showing a press-molding mold immediately before taking out a workpiece having a negative angle formed from the mold.
FIG. 3 is a perspective view of the cylindrical cam of the present embodiment, showing a state where a casting screw is embedded in a peripheral wall.
FIG. 4 is a plan view of the handle according to the embodiment, which is divided into an insertion rod and a connecting portion.
FIG. 5 is an explanatory view of the present embodiment, showing a state in which a screw portion of a connecting member is screwed into a screw hole of a cast screw embedded in a cylindrical cam.
6 is an explanatory view of the present embodiment, showing a state in which a connecting rod is connected to the connecting member in the state shown in FIG. 5 and a handle is installed on a cylindrical cam.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st type | mold 2 2nd type | mold 3 Negative angle shaping | molding part 4 Negative angle shaping | molding surface 5 Cylindrical cam 6 Support type 7 Casting screw 8 Screw hole 9 Connecting member 10 Screw part 11 Insertion rod 16 Connection shaft 19 Connection hole 20 Groove 21 Projection 22 Handle

Claims (5)

A molding portion having a negative angle when the second mold is moved in a linear direction toward the first mold and the two molds are brought into abutment with each other, and the first mold is formed in a substantially cylindrical shape; A press-molding die rubbing structure comprising a cylindrical cam having a negative angle forming surface engraved in the peripheral wall axial direction and a supporting die slidably supporting the outer cylindrical surface of the cylindrical cam. Press forming, comprising: a cast screw embedded in the cylindrical cam and having a screw hole formed therein; and a handle provided at a tip end with a screw portion capable of being screwed into the screw hole of the cast screw. Mold rubbing structure. The press-molding according to claim 1, wherein the handle is divided into a connecting member having the threaded portion and a plug, and the connecting member and the plug are connected with one touch. Mold rubbing structure. The connecting member is provided with a connecting shaft formed coaxially with the screw portion, and a distal end surface of the insertion rod is provided with a connecting hole engageable with the connecting shaft, and a side surface of the connecting shaft. The projecting projection is inserted into a substantially L-shaped groove formed on the peripheral wall of the connection hole and opened at one end, so that the connection member and the insertion rod are connected with one touch. A structure for rubbing the press-molding mold according to claim 2. A molding portion having a negative angle when the second mold is moved in a linear direction toward the first mold and the two molds are brought into abutment with each other, and the first mold is formed in a substantially cylindrical shape; And a supporting die for slidably supporting a cylindrical cam having a negative angle forming surface engraved in the peripheral wall axial direction and an outer cylindrical surface of the cylindrical cam. Then, a screw portion provided at the tip of the handle is screwed into a casting screw embedded in the cylindrical cam, the handle is connected to the cylindrical cam, and the handle connected to the cylindrical cam is operated. Rubbing the cylindrical cam and the support die with each other. The handle is formed by being divided into a connecting member having the screw portion and an insertion rod, and a screw portion of the connecting member is screwed into a casting screw of the cylindrical cam, and then the connection is performed. The connecting member and the insertion bar are connected by one-touch by inserting a projection protruding from a side surface of the member into a substantially L-shaped groove provided on a peripheral wall of a front end surface of the insertion bar. Item 5. A method for rubbing a press-molding die according to Item 4.

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