JPH0692011B2 - Mold with slide cam - Google Patents

Description

The present invention relates to a mold provided with a slide cam.

“Prior Art” In a normal die, a lower die is attached to a bed of a press machine and an upper die is attached to a ram, and the upper die is moved up and down to perform punching and forming. Since the upper die moves up and down in the vertical direction, the horizontal processing is performed by converting the vertical processing force into the horizontal direction using the cam member.

This will be described with an example in which a die provided with a cam member is bored in a side wall of a work.

As shown in FIGS. 5 and 6, the lower die 101 fixes a positioning member 104 for positioning the work 103 on the substrate 102.
A passive cam 107 having a punch 106 is slidably provided at a position facing a punching hole 105 on a side wall of the work 103. A heel 108 is fixed to the rear of the passive cam 107. The coil spring 109 is screwed to the passive cam 107 and externally fitted to the tip side of the rod 110 which is inserted through the heel 108.
Put one end of 09 against heel 108 and coil spring 109
A nut 112 is screwed to the other end of the work piece 111 with a washer 111 interposed therebetween to urge the passive cam 107 after the hole has been bored in the work 103 to be pulled back. The passive cam 107 on the substrate 117 of the upper mold 116.
The operation cam 118 is fixed to the opposite position of the.

The upper die 116 descends, and the operating cam 118 moves the coil spring 109.
The passive cam 107 is moved forward against the urging force of the workpiece 103, the hole 106 is formed in the work 103 by the punch 106 and the die 125, and when the upper die 116 rises, the passive cam 107 is retracted by the urging force of the coil spring 109. To be made.

Since the side wall of the work 105 is perforated, the passive cam 107 having the punch 106 as described above moves toward and away from the work 104 and slides on the substrate 102. Punch 106 and die
Since the hole is drilled with 125, the passive cam 107 must slide accurately, and the flange 121 is formed on both sides of the lower part of the passive cam 107.
And a side guide plate 122 and an upper guide plate 123 for guiding the flange 121 are fixed to the substrate 102.

[Problems to be Solved by the Invention] In the above-described mold, the side that guides the side surface of the flange 121 that projects to the side of the passive cam body 107a in order to slide the passive cam 107 between predetermined positions and reciprocate. Guide plate 122 and flange
An upper guide plate 123 for guiding the upper surface of 121 is provided. Since the flange 121, the side guide plate 122, and the upper guide plate 123 are provided, as shown in FIG.
The length l protrudes from the 07a on both sides, and the length l is usually about 100 to 150 mm at the minimum, and a large space is taken on the substrate 122 of the lower die 101 of the press die.

Therefore, if a cam mechanism is provided in the die, a large space can be saved. Since the space can be taken up by providing the cam mechanism, the size of the mold is limited by the bed area of the press mechanism, so it may not be possible to provide the necessary members on the mold, so the number of processing steps It may be necessary to increase the number of molds and add molds.

Flange 1 that protrudes to the side of the main body 107a of the passive cam 107
21 The wear plate 124 at the tip wears as the passive cam 107 repeatedly slides, and the side guide plate 12
A gap is formed between the passive cam 107 and the second cam 107, so that the passive cam 107 cannot slide in the straight direction, and the presence of the gap causes the passive cam 107 to meander.
Since the punch 106 attached to the passive cam 107 also meanders in the same manner, the punch 106 cannot be punched with proper clearance over the entire circumference of the die 125, and burrs are formed around the punched hole. High quality drilling was not possible. Further, since the punch 106 and the die 125 are punched to cause burrs, they are also a cause of chipping of the blade of the punch 106 and the die 125.

"Means for Solving the Problems" Therefore, in view of the above circumstances, the present invention provides a mold provided with a cam member with a necessary function as a cam member, and further, a compact design can be performed, and , The upper die to prevent the cam member from meandering and enable high quality processing
A slide cam base 13 fixed to the substrate 12 of 11 and having a tetrahedron guide portion 16 with a ridge line 15 located below at the tip;
The tetrahedron guide portion 16 of the slide cam base 13 is externally held and slid on the tetrahedron guide portion 16 so that the punch 43 and the trimming cutting edge are provided.
A slide cam 17 for mounting a processing member such as 51, an elastic body 64 interposed between the slide cam base 13 and the slide cam 17 for urging the slide cam 17, and the tetrahedral guide portion 16 of the slide cam 17 The stopper 21 which is erected at a position facing the ridge portion, the stop groove 65 which stops the stopper 21 formed on the ridge line at the lower part of the tetrahedron guide portion 16, and the slide cam 17 which is brought into contact with the slide cam 17 to drive the slide cam 17 This is a mold provided with a slide cam composed of an actuating cam 8 fixed on the substrate 2 of the mold 1.

“Working” When the upper die moves down, the slide cam moves laterally between the operating cam and slide cam base to perform punching, trimming, and other press work. When the machining is completed and the upper die is lifted, the slide cam is returned by being biased by the elastic body.

"Example" The present invention will be described in detail below based on a specific example shown in Figs. 1 to 4 of the accompanying drawings.

FIG. 1 is a vertical cross-sectional view at the bottom dead center of a mold having a slide cam according to a specific embodiment of the present invention, and FIG.
II-II arrow view, FIG. 3 is a III-III arrow view of FIG. 1, 4
The figure is a vertical cross-sectional view at top dead center.

The example described in the present embodiment is an example in which a hole is formed in the work and the lower end of the work is trimmed.

A positioning member 4 for positioning the work 3 is fixed on the substrate 2 of the lower mold 1 with bolts 5. In the vicinity of the positioning member 4, a guide member 6 whose upper surface is an inclined surface that decreases as it approaches the positioning member 4 and is formed so as to come into contact with the V groove is fixed with a bolt 9 by an operating cam 8 mounted with a bolt 7. .

A slide cam base 13 is fixed to the substrate 12 of the upper mold 11 facing the actuating cam 8 with bolts 14. The tip end of the slide cam base 13 is a sloping surface which rises symmetrically with the sloping surface of the actuating cam 8 as it approaches the positioning member 4, and a tetrahedron guide portion 16 having a quadrangle-shaped schematic cross section with a ridge line 15 at the lower end. To form.

A slide cam 17 is provided which slidably holds the tetrahedron guide portion 16 of the slide cam base 13 and slides on the guide member 6 of the operation cam 8.

The slide cam 17 is composed of a V-shaped groove member 18 and a processing member 19 for mounting a punch, a cutting edge, or the like. V groove member 18 is a processed member
Positioning is performed by a key 20 driven into the facing surface of 19, and a stopper 21 is raised and fixed by a bolt 22.

The upper end of the slide cam 17 has the same inclined surface as the tetrahedron guide portion 16 of the slide cam base 13, and the tetrahedron guide portion 16
V-groove for receiving, wear plate 23 is fixed by bolt 24, and tetrahedron guide portion of the slide cam base 13 is formed.
The lower plane 25 of the slide 16 is supported, and the upper plane 26 is pressed by a holding plate 28 attached to the slide cam 17 with bolts 27, and the slide cam 17 is slidably provided on the tetrahedron guide portion 16 of the slide cam base 13. .

Further, the lower surface of the slide cam 17 is fixed by a bolt 30 on a slide member 29 which slides on the guide member 6 of the actuating cam 8 by abutting a V groove.

Attach the mounting plate 41 to the work side of the slide cam 17 by bolts.
Install by 42. Hole punch 43 is punch plate 44
Are attached to the mounting plate 41 by bolts 45. The trimming cutting edge 51 is screwed and attached to the mounting plate 41 with a bolt 46. The stripper plate 47 is biased by a cushion rubber 48, and presses the work 3 before punching and trimming the work 3.

Reference numeral 49 is a die that is fitted with the punching punch 43 to punch a hole, and reference numeral 50 is a cutting blade that trims the end portion of the work 3 by the trimming cutting blade 45.

In order to move the slide cam 17 back after processing, a holding hole 61 is recessed at the rear end of the tetrahedron guide portion 16 of the slide cam base 13, and a support plate 62 is arranged at a position facing the holding hole 61 and the bolt is installed. It is fixed to the slide cam 17 by 63, and an elastic body 64 such as a coil spring is contracted between the holding hole 61 and the support plate 62. When the upper die 11 moves up, the slide cam 17 moves backward by the urging force of the elastic body 64. In order to stop the backward movement of the slide cam 17, the stopper 21 standing upright on the slide cam 17 is engaged with the end portion 65a of the stop groove 65 formed in the ridge line portion below the tetrahedron guide portion 16 of the slide cam base 13. Further, a safety stopper 66 is screwed into the holding hole 61 to determine the position of the coil spring, and a supporting plate 62 is inserted to form a head portion 66a at the end thereof, and the stopper 21 stops the stop groove 65. If it does not stop at the end portion 65a, the head 66a is brought into abutment with the support plate 62 to stop the head 66a so that there is no safety problem.

A return plate 71 is fixed to the slide cam 17 by bolts 72 in order to forcibly retract the slide cam 17 when the upper die 11 moves up, and its lower end is engaged with the actuating cam 8.

Next, the operation of this mold will be described.

As shown in FIG. 4, the work 3 is placed on the positioning member 4 and the upper die 11 is lowered. The state shown in FIG. 4 is a state of top dead center, in which the slide cam 17 slidably provided on the tetrahedron guide portion 16 of the slide cam base 13 attached to the substrate 12 of the upper die 11. Is in contact with the stopper 21.

When the upper die 11 descends from this state, the sliding member 29 of the slide cam 17 contacts the guide member 6 of the actuating cam 8, and the slide cam 17 moves upward between the actuating cam 8 and the slide cam base 13. As the die 11 descends, it advances toward the work 3, the work 3 is punched by the punching punch 43, and the lower part of the work 3 is trimmed by the trimming cutting blade 51.

The state in which the upper die 11 is at the bottom dead center is the state shown in FIG. 1 after performing the punching and trimming by the punching punch 43 and the trimming cutting blade 51.

After that, when the upper die 11 rises, the biasing force of the elastic body 64 is transmitted from the support plate 62 to the slide cam 17, the slide cam 17 retracts, and the stopper 21 of the slide cam 17 moves to the end portion 65a of the stop groove 65. Abut and stop.

Since the slide cam 17 is provided with a return plate 71, if the slide cam 17 does not move backward for some reason, the return plate 71 engages with the operating cam 8 to forcibly move the slide cam 17 backward. .

In the above-described embodiment, the slide cam base is moved from top to bottom.
Although the example in which the slide cam 17, the slide cam 17 and the actuating cam 8 are arranged has been described, they may be arranged as the actuating cam 8, the slide cam 17 and the slide cam base 13 in order from top to bottom.

That is, the unit including the slide cam base 13, the slide cam 17, and the actuating cam 8 can be reversed and used.

Furthermore, although the present embodiment has described an example of processing of punching and trimming, it goes without saying that the present invention can be applied to other forming processing and bending processing.

Further, if the sizes of the slide cam base 13, the slide cam 17, and the actuating cam 8 are standardized, it is possible to immediately cope with the processing of works of various sizes.

"Effects of the Invention" The present invention, as described above, is fixed to the substrate 12 of the upper mold 11,
A slide cam base 13 having a tetrahedron guide portion 16 with a ridge line 15 located at the lower end and a tetrahedron guide portion 16 of the slide cam base 13 are externally held and slide on the tetrahedron guide portion 16. Of the slide cam 17, the slide cam 17 for mounting processing members such as the punch 43 and the trimming cutting edge 51, the elastic body 64 interposed between the slide cam base 13 and the slide cam 17 for urging the slide cam 17, and the slide cam 17 A stopper 21 standing upright at a position facing the ridgeline portion of the tetrahedron guide portion 16, a stop groove 65 for stopping the stopper 21 formed on the ridgeline portion below the tetrahedron guide portion 16, and abutting the slide cam 17. Slide cam
Since the mold is equipped with a slide cam composed of an actuating cam 8 fixed to the base plate 2 of the lower mold 1 and driving the 17, a cam mechanism is provided with a flange for guiding the cam, a side guide plate and an upper guide plate. It is possible to configure the cam mechanism without providing the cam mechanism, and it is possible to provide the cam mechanism in the minimum space for providing the cam mechanism.

Since the conventional cam mechanism takes a lot of space, the size of the mold is limited by the bed area of the press machine, so it is not possible to provide the necessary members on the mold, increasing the number of processing steps. However, the present invention does not add a mold for the above reason.

The cam mechanism of the present invention is capable of processing a work having a curved surface in order to save space, that is suitable for the curved surface, that is, can be machined from the normal direction to the curved surface, and does not form an ellipse in the case of drilling a round hole. It becomes a perfect circle and the processing quality is improved.

Further, the present invention allows the mold to be small, is light and inexpensive, and requires less time to finish the mold. Since the mold can be small, machine tools and cranes in the factory that process the mold can also be processed with small ones.

Further, in the mold of the present invention, since the slide cam is held by the slide cam base so as to be slidable, even if the sliding part is worn by using the mold for a long time, the cam does not move like a conventional mold. It can move in a straight line without meandering and can perform high-quality press processing. Moreover, since the slide cam moves correctly in a straight line direction, punches, dies, cutting blades, etc. do not lack a blade portion. In the embodiment of the present invention, since the sliding surface between the slide cam and the actuating cam is formed in the V groove, the cam does not meander at all.

In addition, the present invention can be divided into small parts because the sliding machine is provided at the center of the cam, and can be held in multiple parts by being divided into small parts as compared with the conventional one in which the flange is projected on both sides. Compared to the conventional large cam member that can hold only both sides of more than 1 m, it is possible to hold the cam member safely by using multiple polyhedral slide cam bases and slide cams. Even with this, high precision processing is possible by sliding with high precision.

Further, according to the present invention, if the cam parts are standardized, it is possible to immediately cope with machining of works of various sizes.

The inventor performed a wear test for 300,000 times with a mold having a slide cam having the illustrated structure, and the wear amount was (1.5
~ 2.5) × 1/100 mm, the wear amount of a normal slide cam was about 1/3 of 5/100 mm, which was a good result.

Furthermore, when processing a workpiece with a processing member such as the punch of the slide cam or the trimming cutting edge of the present invention,
Even if an eccentric load is applied to the slide cam, the slide cam is guided and slid by the slide cam base of the polyhedron, so that the slide cam moves accurately without eccentricity and high-precision machining becomes possible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a die having a slide cam according to a specific embodiment of the present invention at the bottom dead center, and FIG. 2 is II of FIG.
-II arrow view, FIG. 3 is a III-III arrow view of FIG. 1, FIG. 4 is a longitudinal sectional view of the cam mechanism of the present invention at the top dead center, and FIG. 5 is a conventional cam mechanism. The press die used is a front view, and FIG. 6 is a side view of FIG. 11 …… Upper mold 12 …… Substrate 15 …… Ridge line 16 …… Tetrahedral guide 43 …… Punch 51 …… Trimming cutting edge 17 …… Slide cam 13 …… Slide cam base 64 …… Elastic body 21 …… Stopper 65 …… Stop groove 8 …… Actuating cam

Claims (1)

[Claims] 1. A ridge line 15 fixed to a substrate 12 of an upper die 11 at the tip.
A slide cam base 13 having a tetrahedron guide portion 16 located at the lower side, and a tetrahedron guide portion of the slide cam base 13.
Hold the 16 in the shape of an external fit and slide the tetrahedron guide 16 to punch 43.
A slide cam 17 for mounting a processing member such as a trimming cutting edge 51, an elastic body 64 interposed between the slide cam base 13 and the slide cam 17 to urge the slide cam 17, and the tetrahedron of the slide cam 17. A stopper 21 standing upright at a position facing the ridge of the guide portion 16 and a stop groove 65 for stopping the stopper 21 formed on the ridge of the lower portion of the tetrahedron guiding portion 16.
And a slide cam 17 that drives the slide cam 17 in contact with the slide cam 17 and a working cam 8 fixed on the substrate 2 of the lower mold 1 to provide a mold having a slide cam.