JPH0683131U - Forging and forging tools with anti-seizure processing - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents seizure from the mating mounting holes of forging and forging tools. [Structure] Forging dies, punches, punch holders, etc.
In the forging tool, an oil passage (4) is formed on the peripheral surface from the tip end side to the base end side of the tool. Since an oil passage (4) communicating from the tip side to the base side is formed on the peripheral surface of the tool, when the lubricating and cooling oil is poured over the tool during cold forging, the oil is the oil of the tool. It flows along the path (4) and flows into the base end side, and this oil enters the fitting clearance between the tool and the mating mounting hole,
Prevents seizure between the tool and the mating mounting hole. Also, oil passage
In (4), when the tool is fitted into the mating mounting hole, it plays a role of an air escape passage, and the fitting resistance of the tool due to air can be eliminated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a forging / forging tool attached to a transfer forging / forging apparatus such as a nut home, a bolt home, and a parts home.

[0002]

[Prior art]

 As is well known, as shown in FIG. 6, the transfer forging / forging apparatus is provided with a plurality of dies (1) each having a die hole having a shape close to that of the final product in a stepwise manner. Insert the tip of the set bolt (9) screwed into the die block (5) into the mounting hole (51) provided in the station, and press it against the retaining slope (15) of the die (1). ) Is fixed to the die block (5). The punch (30) attached to the ram (6) drives the product blank (8) into the die cavity (14) of the die (1), and the knockout pin (53) provided in the die block (5) The blank (8) in the mold cavity (14) is discharged, the discharged blank (8) is transferred to the next forging / forging station by a transfer device (not shown), and the blank is punched again by a die. Drive into the mold cavity. Every time the blank is fed to each forging / forging station, the above-mentioned work is repeated to finish the axial blank into a product shape.

The forging and forging tools such as the die (1), the punch (30), the punch holder (2), etc. are consumable items and must be replaced with new ones when the die is broken. When forging different products, the molds and tools are replaced. In recent years, this forging / forging tool replacement work is performed by an automatic tool changing device using a robot or the like, in consideration of labor saving and work accuracy.

However, these forging / forging tools are tightly fitted to the mating attachment member, and during operation of the forging / forging apparatus, the axial compressive force and the radial bulging force are repeated. As a result, heat generated by this frictional force and heat generated by forging pressure may cause seizure between the outer peripheral surface of the tool and the hole surface of the mating member.

Since the lower peripheral surface of the die (1) is strongly pressed against the hole surface of the die (1) by the set bolt (9), this portion is particularly easily seized. If the forging / forging tool seizes on the mating member, the tool cannot be removed, and a large load is applied to the robot, causing problems such as damage or stop of the robot.

The present invention focuses on the fact that in cold forging, oil for lubrication and cooling is constantly poured on the forging and forging tools such as dies and punches, and this oil is used as the outer periphery of the forging and forging tools. A forging / forging tool that can prevent seizure of the tool is clarified by providing a passage for introducing between the mating member and a mounting hole in the forging / forging tool itself.

[0007]

[Means for solving the problem]

 Forging and forging tools such as dies, punches and punch holders according to the present invention are characterized in that an oil passage (4) is formed on the peripheral surface from the tip end side to the base end side of the tool.

[0008]

[Action and effect]

 In the forging / forging tool of the present invention, since the oil passage (4) communicating from the tip side to the base end side of the tool is formed on the peripheral surface, the oil for lubrication and cooling is used for the forging / forging tool. ) From the outside to the base end side of the forging / forging tool, and this oil penetrates into the mating clearance between the forging / forging tool and the partner mounting hole, causing seizure between the forging / forging tool and the mating mounting hole. Prevent.

Further, the oil passage (4) serves as an air escape passage when the forging / forging tool is fitted into the mating attachment hole, so that the fitting resistance of the forging / forging tool due to air can be eliminated.

[0010]

[Embodiment] FIG. 1 shows a first embodiment of the die (1), in which oil passages (4) extending in the axial direction are opened at equal intervals on the circumferential surface, and the width is slightly narrowed inward from the tip side. The gutter (11) has been opened. The circumferential groove (11) is a groove into which a claw (not shown) of the automatic tool changer fits to hold the die (1). As shown in FIG. 6, the die block (5) is fitted with the die (1). ), The peripheral groove (11) is exposed to the outside.

The base peripheral surface of the die (1) is carved into a small diameter portion (12). A guide hole (13) in which the knockout pin (53) slides is opened at the center of the die (1), and a mold hole (14) is formed at the center of the tip surface so as to communicate with the guide hole (13). ing .

FIG. 2 shows a second embodiment of the die (1), in which the oil passage (4) having a substantially X shape is formed on the lower peripheral surface of the die which easily causes seizure and which extends in the axial direction as a whole. Has been opened.

FIG. 3 shows a third embodiment of the die (1) in which a spiral oil passage (4) formed by knurling is provided on the peripheral surface.

FIG. 4 shows an embodiment of the punch holder (2), in which a peripheral groove (21) is opened on the outer periphery on the distal end side, and a small diameter portion (22) is formed on the proximal end side by cutting, and the peripheral groove is formed. Groove-shaped oil passages (4) extending in the axial direction are provided at equal intervals between the (21) and the small diameter portion (22).

As shown in FIG. 6, a punch mounting hole (23) is formed in the center of the punch holder (2). The punch holder (2) is attached to the ram (6) via the support base (7) so that the circumferential groove (21) or part of the oil passage (4) is exposed to the outside.

FIG. 5 shows an embodiment of the forming punch (3), which is directly attached to the support base (7) as shown in FIG.

In the forming punch (3), a peripheral groove (31) is formed on the outer periphery on the tip side, and a small diameter portion (32) is formed on the base end side by cutting, and the peripheral groove (31) and the small diameter portion (32) are formed. The oil passages (4) extending in the axial direction are opened at equal intervals with the (32).

The forming punch (3) is attached to the support base (7) so that a part of the circumferential groove (31) or the oil passage (4) is exposed to the outside.

However, the forging and forging tools such as the die (1), the punch holder (2), and the forming punch (3) have an oil passage (4) communicating from the tip side to the base side of the tool on the peripheral surface. Since it is formed, when the oil for lubrication and cooling is poured on the forging / forging tool in cold forging, the oil travels through the oil passage (4) of the tool and is the base of the forging / forging tool. This oil flows into the end side, and this oil penetrates into the fitting clearance between the forging / forging tool and the mating mounting hole to prevent seizure between the tool and the mating mounting hole.

When the forging / forging tool is fitted into the mating attachment hole, the oil passage (4) serves as an air escape passage, and the tool's fitting resistance due to air can be eliminated. Of course, in the punch holder (2) or the forming punch (3), the groove shape shown in FIGS. 2 and 3 can be selected as the oil passage. Further, it goes without saying that the oil passage can be provided only in a portion where seizure easily occurs.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the scope of the utility model registration request or reducing the scope. Further, the configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the scope of claims for utility model registration.

[Submission date] May 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

Since the lower surface of the die (1) is strongly pressed by the set bolt (9) against the hole surface of the die block (5) which is a mating attachment member, this portion is particularly easy to seize. If the forging / forging tool seizes on the mating member, the tool cannot be removed, and a large load is applied to the robot, causing problems such as damage or stop of the robot.

[Brief description of drawings]

FIG. 1 is a front view, a right side view and a sectional view of a first embodiment of a die.

FIG. 2 is a front view and a bottom view of a second embodiment of a die.

FIG. 3 is a front view of a third embodiment of the die.

FIG. 4 is a front view of a die holder.

FIG. 5 is a front view of a forming punch.

FIG. 6 is a cross-sectional view showing a state where a blank is thrust into a die.

FIG. 7 is a cross-sectional view showing a forged / forged state by a forging / forging punch.

[Explanation of symbols]

 (1) Die (2) Punch holder (3) Forming punch (4) Oil passage

Claims (1)

[Scope of utility model registration request] 1. A forging / forging tool such as a die, a punch, a punch holder, etc., characterized in that an oil passage (4) communicating from the tip end side to the base end side of the tool is formed on the peripheral surface. Forging and forging tools with anti-sticking processing.