JPH0829385B2 - Tools for forging and forging - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging / forging tool in which a slide die slidably disposed in a die case or a punch pin slidably disposed in a punch is biased in a projecting direction by a spring. It is a thing.

[0002]

2. Description of the Related Art As shown in FIG. 4, a shaft body (9
In order to forge and press-form the part (9) having the hole (93) on the end face of 2), as shown on the left side from the center line L in FIG. 4, the flanged blank (90) formed in the previous step is Punch (70)
Driven into the stepped die hole (21) of the slide die (2) with the blank (90) restrained by the stepped die hole (21),
As shown on the right side of the center line L, the hole (93) is pushed to a position corresponding to the depth of the hole (93), and the fixed punch (4) is bite into the end face of the blank (90) to form the hole (93). In this way, the blank (90) is inserted into the stepped mold cavity (21) from the start of molding to the end of molding.
By constraining with, it is possible to form parts that do not lose their appearance.

FIG. 5 shows a die for forming the above parts. A protruding sleeve (3) is slidably provided on the axis of the die case (11), and the protruding sleeve is provided.
Deploy punch (4) through (3). Die case (11)
The punch holder (43) fixed to the rear part of the punch (4)
Is fixed, and the tip of the punch (4) penetrates the bottom of the slide die (2) and is exposed in the stepped die hole (21). Between the punch holder (43) and the slide die (2), the spring (67)
Is installed and the slide die (2) is urged in the pop-out direction.

The punch holder (43) has a die spacer.
(8) is connected, and a sleeve protruding pin (51) is provided slidably passing through the spacer (8), and the tip of the pin (51) is protruded through a sleeve spacer (31).
It hits (3). The die spacer (8) is for fitting the die into the mounting hole (101) of the die block (100) of the transfer press so that the die and the die block are flush with each other.

[0005]

[Problems to be solved by the invention] Punch holder (43)
A spring accommodating portion (47) is opened in the spring to secure a spring accommodating space. However, when the spring is designed with emphasis on the spring strength and the stroke of the slide die (2), the spring for accommodating the spring is In order to secure the accommodating part (47), the total length of the die becomes long, and accordingly, the punch (4) and the protruding sleeve (3).
Also becomes longer. If the punch (4) and the protruding sleeve (3) are long, the cost is increased for accuracy. Further, since the bottom surface of the slide die (2) is directly received by the spring, there is a problem that the slide stability of the slide die (2) is poor.

In the present invention, attention is paid to the fact that the die spacer (8) has a sufficient length for forming a spring accommodating portion, and the die spacer (6) is attached to the spring unit (6) containing the spring. 8) is also used, and the slide die (2) is biased by the spring (67) in the spring unit (6) to clarify a forging / forging tool that solves the above problems.

[0007]

[Means for Solving the Problems] A slide die (2) is provided in a die case (11) so as to be slidable in an axial direction, and a spring (67) urges the slide die (2) in a pop-out direction. In a forging / forging tool in which a punch (4) is slidably penetrated through the bottom surface of the die (2), the rear opening of the die case (11) is closed by a punch holder (43), The spring unit (6) is connected to the back surface of the punch holder (43), the push pin (5) is slidably pierced through the punch holder (43), and the spring (67) built in the spring unit (6). The slide die (2) is urged by the push pin (5).

The present invention can also be carried out on the punch side. In this case, the spring unit is provided at the rear part of the punch (70) in which the punch pin (72) is slidably arranged at the axial center, through the intermediate spacer (13). (6) is connected, the push-out pin (5) is provided slidably through the intermediate spacer (13), and the spring (67) built in the spring unit (6) allows the push-out pin (5) to pass through. Energize the punch pin (72).

[0009]

[Operation and effect] Since the spring (67) is arranged in the spring unit (6) having a length which also serves as a die spacer and which is separate from the die part (1), the structural design of the movable part of the die part (1) is designed. In, there is no restriction on spring strength and stroke. The protruding sleeve (3) and the punch (4) can be designed to have the necessary minimum lengths, the accuracy can be easily obtained, and the cost can be reduced.

By interposing the spring spacer (66) in the spring unit (6), the spring strength and stroke can be easily adjusted. Spring unit (6)
Can be standardized and used by connecting to various die parts (1). Since the slide die (2) is biased through the push pin (5), the spring directly slides the die as in the conventional method.
The slide stability of the slide die (2) is improved as compared to the case where the bottom surface of (2) is urged.

When implemented on the punch side, the punch has a smaller outer shape than the die portion (1), so it may be difficult to accommodate the spring in the punch due to the design. A spring unit separate from the punch section (7)
By housing the spring (67) in (6), this problem can be solved.

[0012]

EXAMPLE FIG. 1 shows a spring unit in the die part (1).
This is an example in which (6) is connected. The die part (1) is formed by fitting the slide die (2) into the tubular die case (11).
The punch holder (43) is fixed to the rear end of (11). The slide die (2) is formed integrally by fitting a die body (22) having a stepped die hole (21) in the shaft center by press fitting, cylindrical fitting with a bottom (23), shrink fitting, etc., A stopper is drawn by hitting the stepped portion (12) of the hole of the die case (11).

The punch holder (43) is tightly fitted in the hole of the die case (11), and the flange (44) at the outer end is attached to the die case (1).
1) It is applied to the rear end face. A recess (45) is opened at the center of the inner end of the punch holder (43), and the punch (4) is provided so as to penetrate the axial center. The proximal end head (41) of the punch (4) is received by the spring unit (6) via the punch roller (42),
The tip extends through the bottom of the slide die (2) and is exposed to the stepped die hole (21).

The recess (45) of the punch holder (43) is slidably penetrated through the punch (4) and the sleeve spacer (3
1) is fitted, and the punching sleeve (3) is slidably fitted in the punch (4). The base end of the protruding sleeve (3) contacts the sleeve spacer (31), and the tip end is slidably fitted on the bottom of the slide die (2).

In the punch holder (43), a plurality of through holes (46) are formed on the outside of the recess (45) at equal intervals in the circumferential direction, and the push pins (5) are slidably penetrated through the holes. Will be deployed. In the embodiment, there are three through holes (46), and each hole is formed by wire cutting in an arc shape along an imaginary circle whose radial center is the axial center of the punch holder (43). The push-out pin (5) is also formed in an arc-shaped cross-section corresponding to the shape of the through hole (46), and the length of the pin (5) is such that the tip of the pin abuts the bottom surface of the slide die (2) and slides. With the die (2) maximally protruding, the base end of the pin slightly protrudes from the flange (44) of the punch holder (43), and each pin has the same length.

The spring unit (6) is a unit body
(61), a cylindrical spacer (65) covering a part of the main body and forming a spring accommodating space (60) between the main body, a spring (67) and an annular spring spacer (66) accommodated in the space. ) And. The unit body (61) has a thick shaft portion (63) at the outer end of the thin shaft portion (62), and a circumferential groove (64) concentric with the thin shaft portion (62) at the inner end of the thick shaft portion (63). ) Has been established. The outer diameter of the thick shaft (63) is
The outer diameter of the peripheral groove (64) matches the outer diameter of the die case (11), and the inner diameter of the circumferential groove (64) matches the diameter of the thin shaft portion (62). Circumferential groove (6) of the thin shaft (62)
Cover the tubular spacer (65) so that there is room for the width of 4),
An annular spring accommodating space (60) continuous with the circumferential groove (64) is formed between the thin shaft portion (62) and the cylindrical spacer (65).

The bolt (68) is inserted from the outer end of the cylindrical spacer (65), penetrates the flange (44) of the punch holder (43) and is fastened to the die case (11), and then the outside of the unit body (61). Insert the bolt (67) from the end and tighten it to the tubular spacer (65),
Die case (11), punch holder (43), tubular spacer (6
5) Fix the unit body (61). The spring accommodation space
In the embodiment, a plurality of disc springs (64) are provided in (60), and the push-out pin (5) is pressed through the annular spring spacer (66).

Then, the blank (60) is punched by the punch (70).
Is driven into the slide die (2), the slide die (2) retracts against the spring (67), and the slide die (2)
Punch (4) began to bite into the blank from the beginning of the retreat of
When the slide die (2) has finished moving backward, the holes (9
The tip of the punch (4) bites into the depth of 3). When the punch 70 is retracted, the slide die 2 is advanced by the force of the spring 67 and returns to the original position.

Kick-out lever of transfer press
The sleeve protruding pin (51) is protruded by (not shown), and the protruding sleeve (3) is inserted through the sleeve spacer (31).
Enters the stepped mold cavity (21) and sticks out the part (9) from the stepped mold cavity (21). In the present invention, since the spring (67) for urging the slide die (2) is provided in the spring unit (6) having a length which also serves as a die spacer and which is separate from the die portion (1), the die portion ( In the structural design of the moving part of 1),
Not restricted by spring strength and stroke.

The protruding sleeve (3) and the punch (4) can be designed to have the necessary minimum length, the accuracy can be easily obtained, and the cost can be reduced. The spring strength and stroke can be easily adjusted by interposing a spring spacer (66) in the spring unit (6). The spring unit (6) can be standardized and used by connecting to various die parts (1). In addition, in the embodiment, the cross-sectional shape of the push-out pin (5) is formed in an arc shape along a virtual circle whose radial center is the axial center of the punch holder (43), and the push-out pin (5) is formed on the virtual circle. Since it is arranged, the strength can be increased for the thickness of the extrusion pin (5), the wall thickness between the recess (45) of the punch holder (43) and the outer peripheral surface can be made as small as possible, and the die part It can contribute to downsizing of (1).

Further, since the slide die (2) is biased through the push pin (5), compared to the conventional case where a spring directly contacts the bottom surface of the slide die (2) and biases it. ,
The slide stability of the slide die (2) is improved. Further, the tip end shape of the push-out pin (5) is arcuate, so that the contact area with the slide die (2) can be made larger than that of the round shaft pin, and the slide stability can be further improved.

FIG. 3 shows the punched side of the present invention, in which the lower part from the center line L shows the state before driving, and the upper part shows the state after driving, and the left side shows the sleeve before and after processing. . A spring unit (6) similar to the above is attached to the rear end of the punch section (7). The punch part (7) is provided with a stepped die hole (71) at the center of the tip of a cylindrical punch (70) and an intermediate spacer (13) at the rear end.

A punch pin (72) is slidably arranged on the axis of the punch section (7). Punch pin (72) base end
The (76) is integrally slidably held by a punch pin spacer (75) and a punch pin holder (74) slidably arranged in the punch (70).

The sleeve (73) is slidably fitted to the punch pin (72) so as to be slidable, and the sleeve (73) and the punch pin (7) are
The tip of 2) projects into the mold cavity (71). Intermediate spacer (13)
A plurality of push-out pins (5) are slidably pierced through, and the tips of the push-out pins (5) have punch pin spacers (7).
At 5), the base end is in contact with the spacer (66) of the spring unit (6).

The sleeve projecting pin (51) provided through the spring unit (6) penetrates the intermediate spacer (13), the punch pin spacer (75) and the punch pin holder (74), and the projecting sleeve (51). It hits the end face of 73). A sleeve protruding pin (51) is attached to the shaft center of the spring unit (6).
A thick pin (61) for driving the is arranged slidably.

As described above, when the present invention is applied to the punch side, since the punch (70) has a smaller outer shape than the die part (1), the spring (67) may be housed in the punch. It may be difficult to design, but like the present invention, the punch part
This problem can be solved by housing the spring (67) in a spring unit (6) separate from (7).

The spring (67) is not limited to the Belleville spring, but a coil spring can be used. The present invention is not limited to the configuration of the above-described embodiment, and various springs can be used within the scope of the claims. Deformation is possible.

[Brief description of drawings]

FIG. 1 is a sectional view of a die.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a punch.

FIG. 4 is an operation explanatory view of a slide die.

FIG. 5 is a cross-sectional view of a conventional example.

[Explanation of symbols]

 (1) Die part (2) Slide die (3) Projecting sleeve (4) Punch (5) Push pin (6) Spring unit (61) Unit body (67) Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-81243 (JP, A) Actual opening Sho-60-60135 (JP, U) Actual opening Flat 5-76638 (JP, U) Actual opening Sho-61- 46039 (JP, U) Actually opened 62-183936 (JP, U) Actually opened 5-243 (JP, U) Actually opened 61-9161 (JP, U) Actually opened 61-9162 (JP, U)

Claims (2)

[Claims] 1. A slide die (2) in a die case (11).
Is slidably arranged in the axial direction, the spring (67) urges the slide die (2) in the ejecting direction, and the punch (4) is slidably penetrated through the bottom surface of the slide die (2). In the forging / forging tool thus prepared, the rear opening of the die case (11) is closed by the punch holder (43), and the spring unit (6) is connected to the back surface of the punch holder (43).
The push pin (5) is slidably pierced through the punch holder (43), and the slide die (2) is urged through the push pin (5) by the spring (67) built in the spring unit (6). Tools for forging and forging. 2. The punch pin (72) is slidably arranged on the axis of the punch (70), and the punch pin (72) is attached by a spring (67).
In the forging / pressing tool urged in the pop-out direction, the spring unit (6) is connected to the rear part of the punch (70) through the intermediate spacer (13), and the intermediate spacer (13) can be slid. The push-out pin (5) is arranged through the push-out pin (5) by the spring (67) built in the spring unit (6).
Tool for forging and forging in which the punch pin (72) is urged via.