JPS63115630A - Trimming die for front hub - Google Patents

Abstract

PURPOSE:To perform the punching of a shaft hole and burring in one stage by actuating an upper die cushion as well as punching a shaft hole by a punch and providing a burr presser on the male die main body freely movable therewith, in the case of shaping the semi-finishing article for a front hub with trimming male and female dies. CONSTITUTION:This device is composed of the main part of a rim holder 1, die set main body 4, movable part 5, an upper part die cushion 6, male die 14 and female die 14. A front hub semi-finishing article, etc., is placed on a cradle 8. With pushing down the male die 14 the male die 14 is engaged with the semi-finishing article 9 and a burr presser 18 is brought into contact with the upper face of a burr 19. With further descent of the male die 14 a shaft hole is punched by a punch 7 and a core is released to the external part from a forced discharging hole 17. The burr 19 is cut between a blade part 14 and the outer peripheral edge of the male die by the descent of the male die 14 succeeding simultaneously therewith. The burring of the semi-finishing article and the shaft hole punching as well can be performed in one forming stage.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the invention (industrial application field) The present invention is directed to a l-rim die for shaping the front hub of an automobile.

(Prior Art) Conventionally, in molding a front hub, punching out an axle hole and deburring the outer periphery of a semi-finished product are performed in separate work steps. The upper and lower molds are each screwed to the holder with bolts.

(Problems to be Solved by the Invention) If the punching of the shaft hole and the deburring are performed in two steps, the efficiency is very low, and the automation of the trim work is a major hindrance.

The present invention is intended to contribute to the automation of trimming operations by performing both of these operations in one step.

Composition of the Invention (Means for Solving Problems) The present invention comprises a trim die holder, a lower die cushion provided on the lower side of the holder, a pair of cylinders standing upright from the holder, and a structure between the movable parts of these cylinders. The constructed die set body, the upper die cushion provided on this body,
A punch mounted upward on the holder, a semi-finished holder that surrounds the punch and has its lower part passed through the holder and floated on the lower die cushion, and is supported by the holder and has a blade portion on the inner periphery close to the outer periphery of the holder. When the holder is moved relative to the holder, the female trim die located above it, the male trim die main body set in the die set main body, and the male die main body is mounted with a set screw at a position where it cooperates with the female die, and the upper end is attached to the female die. A male trim die communicating with the forced discharge hole of the core pulled out by the punch is disposed on the male die main body so as to be movable in the vertical direction relative to the male die body through an operating part that operates the upper die cushion during this relative movement. It is characterized by being equipped with a burr holder located below the lower surface of the male body (ffu) corresponding to the burr thickness.

Function) A semi-finished forged front hub without an axle hole is fed from the side into the feeding position between the female and male molds of the trim die using a jaw chuck. This feeding method may be a parallelogram transfer feed or a swinging arm type.

At this feeding position, the jaw chuck descends while holding the semi-finished product, and once the semi-finished product is placed on the pedestal, it is released and stands by.

When air is supplied to the cylinder and the die set body is lowered, the male die fits into the semi-finished product and the burr holder comes into close contact with the top surface of the burr.

When the die set body further descends, the pedestal descends via the semi-finished product while receiving the cushioning effect of the lower die cushion. However, since the punch does not move, holes are punched in the semi-finished product one after another starting from the lower end surface. At this time, air is forced to flow from one side to the other through the forced discharge hole of the male main body.

Eventually, when the shaft hole is completely punched out by the punch, the punched material is forcibly carried out of the male mold body by the air flow. Around the time this punching is completed, the lower surface of the burr comes into contact with the upper surface of the female trim die, so the lowering of the male die cooperates with the female die to cut the burr. At this time, the burr is held down by the burr presser, and the pressing force is guaranteed by the upper die cushion through the actuating part and the bottle, preventing the burr from being dragged into the Miyabi mold along with the male mold. - Make sure to pull it out onto the female mold. After deburring, the die set body is raised, the finished product is grabbed by the jaw chuck at the rising end of the pedestal, and moved upward. When it reaches the feeding position, it is turned and the finished product is taken out at the specified removal position. carry.

Therefore, by installing this trim die between the supply position of the forged semi-finished product and the take-out position of the finished product, continuous automatic trimming operation becomes possible.

(Example) 1 is a trim die holder, 2 is a lower die cushion provided on the underside of the holder 1, and 3 is a pair of cylinder levers that stand upright from the holder 1 in opposition to each other. A die set body 4 is installed between the movable parts 5 of opposing cylinders 3, and an upper die cushion 6 is provided on the upper surface. 7 is a punch attached to the die holder 1 facing upward. Reference numeral 8 denotes a pedestal for placing a semi-finished product 9 whose outer shape is simply melt-molded. .

Reference numeral 10 denotes a female trim die, which is supported by the holder 1, and the blade portion 11 on the inner circumference is close to the outer periphery of the pedestal 8, and is positioned above this pedestal when the pedestal 8 moves relative to the other. There is. 12 is a trim die male body, which is set in the die set body 4 with a mounting screw 13. Reference numeral 14 denotes a male trim die, which is pressed 15 and attached to the male die main body 12 at a position where it cooperates with the female die IO, and its upper end communicates with the forced discharge hole 17 of the core 16 punched out by the punch 7.

Reference numeral 18 denotes a holder for the burr 19, which is movable up and down along with and relative to the male body 12 by means of a rod portion 20 that loosely passes through the male body 12 and a crossbar portion 21 at the upper end of this rod portion. The upper die cushion 6 receives a buffering effect from the upper die cushion 6 via the pin 22 during relative movement.

The presser foot 18 is located below the lower surface of the male main body 12 by an amount corresponding to the thickness of the burr 19.

In the drawing, 31 is a mounting plate for the male trim die 14, and 32 is a mounting plate for the male trim die 14.
is the holding plate for the burr presser 1st, 33 is the air piping installation hole, 34
35 is a mounting base for the punch 7, 35 is a mounting screw thereof, and 36 is an operating pin for the lower die cushion 2.

A semi-finished product 9 of a front hub is placed between male and female molds 10 and 14, and placed on a pedestal 8. Here, air is blown into the cylinder 3 to push down the male die 14. The male die 14 is fitted onto the semi-finished product 9, and the burr presser 18 comes into contact with the upper surface of the burr 19. Then, the male die 14 further descends while pressing down the lower die cushion 2 on the pedestal 8 via the semi-finished product 9. At this time, since the punch 7 is stationary, the semi-finished product 9 is punched through the axle hole by the punch 7 as it descends. When the core 16 is separated from the semi-finished product 9, the core 16 is in the forced discharge hole 17 and is discharged to the outside by the pressure of the air. Before and after this punching, the burr 19 of the semi-finished product 9 is placed on the female die 10, and the burr 19 is pressed against the upper surface of the female die 10 by the burr presser 18. Then, as the male die 14 continues to descend, the blade portion 11 and the male die 14
The burr 19 is cut between the peripheral thread 1 and the finished product 9', and the burr 19 is left in that position. The fti impact during cutting of the core 16 and burr 19 is buffered by the lower die cushion 2 and the upper die cushion 6, respectively.

After finishing the cutting process, switch the cylinder 3 and raise the die set body 4. Receiver 8 also lower die cushion 2
When the finished product 9' is raised to a predetermined position by the zero action, the waiting jaw chuck grasps the finished product 9' and rises to the original oversized position, sending the finished product from the two-trowel feeding position to the next process.

C. Effects of the Invention According to the present invention, it is possible to perform both deburring of a semi-finished product and punching out an axle hole in a single production process using both male and female dies.
It has various effects, such as making it possible to continuously mold the front hub and making it easier to attach the male mold with set screws.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing a specific example of the trim die according to the present invention, with the part including the trim die male body omitted;
FIGS. 2 and 3 are partially cutaway side views showing the molding process using the n-male and male molds, respectively, with FIG. 2 showing before molding and FIG. 3 after molding. 1. Trim die holder, 2. Lower die cushion,
3...Cylinder, 4...Daicera!・Main body, 5. Movable part, 6. Upper die cushion, 7. Punch, 8.
cradle, 9...semi-finished product, 9'...finished product, 10...female mold, 11...blade part, 12...male die body, 13...mounting screw, 14...male die, 15... Push, 16... Core, 17
... Forced discharge hole, 18... Burr holder, 19... Burr, 2
0...Rod part, 21...Part of crossbar, 22...Bin. Patent applicant: Kakuda Iron Works Co., Ltd., Tomio Tozawa, and Yukio Iso Figure 1

Claims (1)

[Claims] A trim die holder, a lower die cushion provided on the underside of this holder, a pair of cylinders standing upright from the holder, a die set body installed between the movable parts of these cylinders, an upper die cushion provided on this body, and the holder. A punch is mounted facing upward on the die cushion, a semi-finished holder that surrounds the punch and has its lower part passed through the holder and floats on the lower die cushion; When the base moves relative to each other, the female trim die located above, the male trim die main body set in the die set main body, and the male main body is mounted with a set screw at a position where it cooperates with the female die, and the upper end is held by the punch. A male trim die communicates with the forced discharge hole of the extracted core, and a burr is disposed on the male die main body and also relatively movable in the vertical direction via an operating part that operates the upper die cushion during this relative movement. A trim die for a front hub characterized by being equipped with a burr holder located below the bottom surface of the male body by an amount corresponding to the thickness.