JP2600977B2 - Cam piercing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cam piercing device capable of simultaneously and highly accurately drilling a large number of holes in a work in a radial direction.

(Prior Art) Conventional examples of cam piercing devices include those shown in FIGS. 4 (a) to 4 (c). For convenience of explanation, FIG. 4 (a) is cut along a vertical plane passing through the center of the piercing punch. The state at the time of drilling the hole (bottom dead center) is shown.

In the figure, reference numeral 50 denotes a punch cam slide. Left and right parallel inclined surfaces 50a, 50b are respectively provided on the inclined surfaces 51a, 52a of the punch cam drivers 51, 52, and a flange portion provided below. The sliding surface 50d, which is the lower surface of 50c, abuts a horizontal guide surface 53a formed by partially notching the lifter 53. The portion of the lifter 53 that is not notched is a flange support member as shown in FIG. 4B, which is a cross-sectional view taken along the line II of FIG.
A projection 53d is formed having a horizontal surface 53b connecting the 54 and a vertical surface 53c for guiding the flange portion 50c. A pierce punch 55 works on the upper left of the punch cam slide 50.
The lifter 53 is lowered in accordance with the lowering of the distance 57, and the punch cam slide 50 moves in the piercing punching direction (the direction of arrow X in the figure) to move the workpiece 56 as shown in the figure. Penetrate.

A sliding surface 50e and a partial notch 50f are provided above the punch cam slide 50. A fourth surface is provided between the sliding surface 50e and the flange-shaped support member 59 having an L-shaped cross-section. As shown in FIG. 7B, the flange portion 60a of the die cam slide 60 is fitted, and an inclined surface 60b having the same inclination angle as the inclined surface 61a of the die cam driver 61 is provided at the upper right of the die cam slide 60. The pierce die 62 is buried on the left. The vertical section below the die cam slide 60
An elastic member 63 is attached to 60c, and the elastic member 63 presses and biases the left side surface of the notch 50f of the punch cam slide 50.

This cam piercing device is provided with a punch cam slide as the lifter 53 descends with the lowering of the distance 57 when the work 56 descends with the lowering of the pad 64 and stops at a predetermined position with the lowering of the distance 57 at the time of drilling. The pierce punch 55 coupled to the punch cam slide 50 moves in the piercing punching direction (X direction) against the elastic member 63 while sliding along the inclined surfaces 51a, 51a of the punch cam drivers 51, 52.
However, by cooperating with a pierce die 62 coupled to a die cam slide 60 that moves in a direction opposite to the pierce punching direction as the die cam driver 61 descends, a desired position of the workpiece 56 is punched. is there.

(Problems to be Solved by the Invention) By the way, in this conventional device, II in FIG.
As shown in the drawing is a -II line cross-sectional view (c), inevitably increase the width W ₂ of the punch cam slide 50 than the width W ₁ of the die cam slide 60, drilling mechanism 1 shown in θ Since the occupying angle (and occupied space) per group becomes large, a plurality of such drilling mechanisms are arranged on the same circumference to form a cam piercing device that simultaneously drills a large number of workpieces in the radial direction. Set (4 in the case of FIG. 4 (c))
Pairs). Further, since the lifter 53 does not directly support the die cam slide 60, as shown in FIG. 4B, the offset amount of the pierce center with respect to the cam center is equal to the sum of the clearances (A + B) of the two flange support portions with respect to the cam center. Due to the large size, the accuracy of drilling the work is not improved. Further, as shown in FIG. 4 (a), the die cam slide based on the shearing force F of the punch cam slide 50.
Since the drag N generated by the bending moment M of 60 directly acts on the punch cam slide 50, the punch cam driver
In addition to the shear force F as the acting force P of 51, a friction force μN obtained by multiplying the above-mentioned resistance N by the friction coefficient μ is also required (P = F + μN), so that the life of the mold is shortened.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problem by providing a structure in which a lifter has a structure in which a flange portion of a die cam slide is directly supported by a flange support member coupled to a protrusion thereof.

(Means for Solving the Problems) For this purpose, the cam piercing device according to the present invention has the following features.
A punch cam slide slidably supported in a piercing direction between a parallel inclined surface provided on a second punch cam driver and a horizontal guide surface provided on a lifter, and an upper surface of the punch cam slide; A die cam slide having a flange portion fitted between the flange support members and an inclined surface which comes into contact with an inclined surface provided on the die cam driver; and a piercing member which is coupled to the punch cam slide and pierces the work as the lifter descends. A pierce punch that moves in the punching direction, and a pierce die that is coupled to the die cam slide and cooperates with the pierce punch in a direction opposite to the pierce punching direction of the die cam slide based on the lowering of the die cam driver. And at least one set of the punch piercing slide and the width of the punch cam slide. A protrusion having a horizontal surface for connecting the flange support member to the lifter and a vertical surface for guiding the punch cam slide, and a horizontal surface, the protrusion and the flange support member forming the lifter. The flange portion is slidably supported by the groove portion.

(Operation) According to the present invention, since the vertical surface of the protrusion of the lifter guides the vertical surface of the punch cam slide, the flange portion of the punch cam slide is abolished, and even if the width thereof is reduced, there is a problem in strength. , The width can be made smaller than the slide width of the die cam slide, so that the occupied angle per set of drilling mechanisms is reduced, so that a larger number of sets of drilling mechanisms than the conventional example are arranged on the same circumference. And a cam piercing device for simultaneously forming a large number of holes in the work in the radial direction can be configured. In addition, since the die cam slide and the punch cam slide each slide alone in the groove formed in the lifter, the offset amount of the pierce center with respect to the cam center is only the clearance of the upper flange support portion, so drilling of the work is performed. Processing accuracy is improved. Further, since the drag N generated by the bending moment M acts on the lifter and does not act on the punch cam slide, the driver acting force P becomes only the shear force F, and the mold life is improved.

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

FIG. 1 (a) is a view showing a configuration of a first embodiment of a cam piercing device of the present invention, in which 10 is a punch cam slide,
11, 12 are punch cam drivers, 13 is die cam slide, 1
Reference numeral 4 denotes a die cam driver, which shows a state at the time of drilling (at the time of bottom dead center).

The left and right sides of the punch cam slide 10 are provided with parallel inclined surfaces 10a and 10b, and these inclined surfaces 10a and 10b are provided.
Is the inclined surface 1 of the same inclination angle of the punch cam drivers 11 and 12, respectively.
Contact 1a and 12a. A sliding surface 10c in the horizontal direction is provided below the sliding surface 10c, and the sliding surface 10c contacts a horizontal guide surface 15a formed by partially removing the lifter 15. As shown in FIG. 1B, which is a cross-sectional view taken along the line III-III of FIG. 1A, the lifter 15 is notched so that a groove is formed by the guide surface 15a and the vertical surface 15b. The punch cam slide 10 is fitted to the guide surface 15 and is slidably supported by the guide surface 15a and the vertical surface 15b.

A piercing punch 17 supported by a member 16 is joined to the upper left of the punch cam slide 10 by a member 18. A groove-shaped section member 19 is fitted between the upper surface of the member 18 and the lower surface of the punch cam slide 10, and the lower surface of the member 19 is a lifter.
The upper surface contacts the work 20. The work 20 is a cylindrical component having a cross section as shown (a component for a torque converter in this example), and is held between the member 21 and the pad 21 when the pad 21 descends. Pierce punch 17 work
When the punch cam slide 10 slides downward along the slopes 11a, 12a of the punch cam drivers 11, 12, the punch cam slide 10 moves in the piercing punching direction (the direction of the arrow X) to move the workpiece as shown in the figure. Through 20. In order to take out the work after processing, a work take-out device 22 penetrating through the hollow portion of the punch cam driver 11 is provided.

A sliding surface 10d and a partial notch 10e are provided above the punch cam slide 10, and the sliding surface 10d has a flange portion 13 of a die cam slide 13 as shown in FIG.
The lower surface of a is slidably supported, and the flange 13a
The flange support member 23 and the projection 15c connected to the horizontal surface 15d of the projection 15c formed by the notch of the lifter 15.
Are also slidably supported by the groove formed by the vertical surface 15e and the horizontal surface 15f. A member 26 to which a shaft 25 for supporting the elastic member 24 is connected is connected to the lower right of the die cam slide 13. The elastic member 24 is formed by cutting out the punch cam slide 10.
The left side of 10e is pressed and urged. An inclined surface 13b having the same inclination angle as the inclined surface 14a of the die cam driver 14 is provided at the upper right of the die cam slide 13.
3 moves in the direction opposite to the piercing punching direction (X direction) as the die cam driver 14 descends. The right side surface 14b of the die cam driver 14 is the vertical surface 1 of the punch cam driver 12.
2b, the pad is connected to the upper base 27 so as to be in contact with the upper base 27, and is connected to the upper base 27 by an elastic member (not shown).
A member 28 that engages and lifts 21 when ascending is also connected.

A pierce die 30 supported by a member 29 is joined to the left side of the die cam slide 13 by a member 31. The piercing die 30 pierces the work 20 in cooperation with the piercing punch 17 in accordance with the movement of the die cam slide 13 described above.
Is provided with a scrap discharge hole 13c, so that the scrap falls on a 45-degree slope of the member 32 penetrating the scrap discharge hole 13c, and as shown in FIG. It is led to the discharge hole 33a of the lower base 33 through the 10 discharge holes 10f and the discharge hole 15g of the lifter 15. The punch cam drivers 11 and 12 are coupled to the lower base 33, and a cushion pin 34 is inserted into a shaft hole 33b. The cushion pin 34 urges the lifter 15 from below.

Next, a drilling operation of the cam piercing device will be described. First, before drilling (when returning), when the upper base 27 rises, the die cam driver 14 and the member 2
8, the pad 21 and the like move upward from the state shown in FIG. 1 (a). At this time, the inclined surface 13b of the die cam slide 13 and the inclined surface 14a of the die cam driver 14 are engaged. The die cam slide 13 slides in the piercing direction by the spring force of the elastic member 24 until the member 26 contacts the right side surface of the notch 10e of the punch cam slide 10, and the punch cam slide
10, the pierce punch 17 separates from the workpiece 20 by stroke upward on the inclined surfaces 11a and 12a of the punch cam drivers 11 and 12,
The pad 21 is separated from the work.

On the other hand, when drilling,
27 is lowered, first the pad 21 holds the work 20 between the member 19, and then the distance (not shown) pushes the lifter 15 down through the flange support member 23 in this state, so that the punch cam slide 10 Cam driver 11,1
2 moves in the piercing direction (X direction) against the spring force of the elastic member 24 while sliding along the inclined surfaces 11a and 12a, and the piercing punch 17 coupled to the punch cam slide 10 approach. As described above, while the pierce punch 17 approaches the workpiece, the die cam slide 13 moves in the direction opposite to the pierce punching direction as the die cam driver 14 descends, with the inclined surface 13b abutting on the inclined surface 14a. Then, as shown in FIG. 1 (a), when the vertical surface of the die cam driver 14 comes into contact with the vertical surface of the die cam slide 13, the piercing die 30 connected to the die cam slide 13 stops at the position where it comes into contact with the work 20. Then, as described above, by cooperating with the piercing punch 17 approaching from the piercing punching direction, a hole is formed at a predetermined position of the work 20.

In the cam piercing device of the present embodiment, as shown in FIG. 1B, the punch cam slide 10 is independently guided within the notch of the lifter 15 by the guide surface 15a and the vertical surface 15b. the width W ₄ of the slide no problem in strength even smaller than the conventional example, can be made smaller than the width W ₃ of the flange portion of the width W ₄ of the punch cam slide die cam slide 13. Therefore, FIG.
As shown in FIG. 2 which is a plan view as viewed from the line IV-IV, the occupied angle θ 'per one set of the drilling mechanism and, consequently, the occupied space per set are shown in FIGS. 4 (a), (b), (C), the number of drilling mechanisms can be greatly reduced compared to the conventional example, and a larger number of drilling mechanisms (eight in this example) can be arranged on the same circumference than the conventional example, and a larger number of drilling mechanisms can be formed in the radial direction with respect to the workpiece. A cam piercing device that performs drilling simultaneously can be configured.

As shown in FIGS. 3 (a) and 3 (b), when the lateral pressure f acts on the pierce die at the time of drilling, the offset amount c of the pierce center with respect to the cam center in the conventional example is shown. Becomes l ₂ · sin α + l ₁ · sin β,
In this example, the offset amount c ′ is only l ₁ · sin β and is greatly reduced, so that the accuracy of boring the workpiece is improved.

Further, the flange support member 23 is moved to the horizontal surface 15d of the lifter 15.
From the conventional example K = FL·L / a to the present example K ′ = FL·L ′ / a ′, and L≫L ′, which is greatly reduced. The width dimension of the member 23 can be reduced, and the space occupied by one set of the drilling mechanism can be further reduced.

(Effect of the Invention) As described above, the cam piercing device of the present invention has a structure in which the lifter is configured to directly support the flange portion of the die cam slide by the flange support member coupled to the protruding portion. By making the width smaller than the width of the cam slide, the occupied angle per set of drilling mechanisms can be reduced, so that a larger number of sets of drilling mechanisms can be arranged on the same circumference than in the conventional example. A cam piercing device that simultaneously makes a large number of holes can be formed. Also, since the die cam slide and punch cam slide each slide alone in the groove formed in the lifter, the offset amount of the center of the pierce with respect to the cam center is only the clearance of the upper flange support part, so drilling of the work Processing accuracy is improved. Further, since the drag N generated by the bending moment M acts on the lifter and does not act on the punch cam slide, the driver acting force P becomes only the shear force F, and the mold life is improved.

[Brief description of the drawings]

1 (a) and 1 (b) are views showing the structure of a first embodiment of the cam piercing device of the present invention, and a sectional view taken along the line III-III of FIG. 1, and FIG. FIGS. 3 (a) and 3 (b) are plan views viewed from the line IV-IV, and FIGS. 4 (a), 4 (b) and 4 (c) are views for explaining the same example and a conventional example. FIG. 2 is a diagram showing a configuration of a conventional cam piercing device. 10… Punch cam slide, 10a, 10b… Slope, 10c, 10d… Slide, 11,12… Punch cam driver, 11a, 12a… Slope, 13… Die cam slide, 13a… … Flange, 13b… Slope, 14 …… Die cam driver, 14a …… Slope, 15 …… Lifter, 15a, 15e …… Guide, 15b …… Vertical, 15c …… Protrusion, 15d, 15f Horizontal plane, 17 Pierce punch, 20 Work, 23 Flange support member, 30 Pierce die

Claims (1)

(57) [Claims] 1. A punch cam slide slidably supported in a piercing direction between a mutually parallel inclined surface provided on a first and a second punch cam driver and a horizontal guide surface provided on a lifter. A die cam slide having a flange portion fitted between the upper surface of the punch cam slide and the flange support member and an inclined surface abutting on an inclined surface provided on a die cam driver; and the lifter coupled to the punch cam slide. A pierce punch that moves in the pierce punching direction with respect to the workpiece with the lowering of the workpiece, and a pierce punching direction of the die cam slide that is coupled to the die cam slide and that is based on the lowering of the die cam driver. A cam piercing device comprising at least one set of a pierce die cooperating with the pierce punch, wherein a width of the punch cam slide is adjusted by the die. A protrusion having a horizontal surface and a vertical surface for guiding the punch cam slide, the horizontal surface connecting the flange support member to the lifter, being smaller than the width of the flange portion of the cam slide,
A cam piercing device wherein the flange portion is slidably supported by the projection and a groove formed by the flange support member.