JPH0123622Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a trimming die in a transfer press that forms the overhang remaining around the opening of a drawn cylindrical container. The present invention relates to a trimming type suitable for use when the height of the blade is high.

``Prior Art'' Conventionally, in the trimming mold, a cylindrical container was placed with the opening facing down on a punch in the lower mold, and the area around the opening was trimmed to a specified size using a die and punch in the upper mold. In order to increase the stability of the product left on the punch after trimming when the product has a large height relative to the trimming diameter, the punch 1 is provided with a pilot 2 for positioning the product, as shown in FIG.

``Problems to be solved by the invention'' In the conventional trimming die mentioned above, if the height of the product placed on the lower die punch without a pilot is large compared to the trimming diameter, it is indicated by the dashed line in Figure 4. When the product 3 deviates from the punch 1, it tends to tilt or fall, and the feed bar (not shown) of the transfer press often fails to transport the product. In addition, when the pilot 2 shown in Fig. 3 is installed on the punch 1, the workpiece from the previous process gripped by the fingers of the feed bar is raised above the height of the pilot 2, carried onto the punch 1, and then lowered. After trimming, the product 3 gripped by the fingers must be raised above the height of the pilot 2 before being carried out. This lifting and lowering movement impairs the stability of the processed products and products, and also has the disadvantage that it cannot follow the speed of the press. The object of the present invention is to eliminate these drawbacks and provide a trimming mold for a transfer press that does not require a pilot and has good stability.

"Means and effects for solving the problem" The configuration of the present invention is such that two receiving members for products, etc., each having an upper surface at the same height as the upper surface of a punch provided in a lower die, are placed in the transport direction of the transfer press. They are arranged facing each other at right angles and can move forward and backward toward the punch, and each receiving member is connected with a cylinder that moves forward and backward with pressurized air.The pressurized air is switched in conjunction with the transfer press, and the workpiece is placed on the punch. The receiving member is moved forward to form a flat surface around the punch when the punch is being carried in, is moved back during trimming, and is moved forward again as the upper die rises. Therefore, it is possible to ensure the stability of the posture of the processed product being carried in and the product after trimming, it is possible to follow the increase in speed of the transfer press, and it is possible to eliminate failures in conveyance.

``Example'' In FIGS. 1 and 2, a trimming mold 4 according to the present invention is shown. A punch 6 is erected in the center of the lower mold 5, and as shown in FIG.
Guides 7, 8 and 7', 8' are provided in the horizontal direction perpendicular to the transfer direction of the transfer press, as shown by
Receiving members 9 and 9' whose upper and side surfaces are guided by the guides 7 and 8 are provided facing each other with the punch 6 in between. The upper surfaces of the receiving members 9, 9' are provided to match the upper surface of the punch 6, and semicircular portions 9A, 9A' along the outer periphery of the punch 6 are provided at the front edges corresponding to the punch 6, respectively. The receiving members 9, 9' are connected to piston rods of cylinders 11, 11' provided on a bracket 10 fixed to the side surface of the lower die 5 and facing the punch 6 at right angles to the conveying direction A. Pressurized air supplied to and discharged from the cylinders 11 and 11' moves the receiving members 9 and 9' back and forth between the positions along the sides of the punch 6 and the positions indicated by the dashed lines in FIG. FIG. 2 shows the receiving member 9 in the retracted position.

Four scrap cutters 1 are placed on the outer periphery of the punch 6 at a required distance lower than the top surface of the punch 6.
2 is provided. In the middle of the scrap cutter 12 facing in a direction perpendicular to the conveying direction A, two chute 13 for discharging scraps are provided facing each other at the position shown by the dashed line in FIG. The lower surfaces of the receiving members 9, 9' are provided with a slope 9B to avoid interference with the scrap cutter 12 and chute 13.

A die 15 having a hole concentrically with the punch 6 of the lower die 5 and fitted with the punch 6 with a required clearance is fixed to the upper die 14.

The upper mold 14 has a hole that guides the outer circumference of the product 16 placed on the punch 6, and the product 16 is urged downwardly above the hole, and after trimming, the product 16 is transferred to the upper mold 14.
A spring member (not shown) is provided which pushes out the punch and leaves it on the punch 6. Cylinder 11, 11'
can also be done by other means.

While the upper mold 14 is being raised, the workpiece from the previous process, which is gripped by the fingers (not shown) of the feed bar of the transfer press, is carried onto the punch 6. The cylinders 11 and 11' are linked to each other at that time.
Since pressurized air is supplied and exhausted and the receiving members 9, 9' move forward to positions along the punch 6, the workpiece rests on the upper surfaces of the punch 6 and the receiving members 9, 9' and is held in a stable posture. When the upper die 14 is lowered and the upper part of the workpiece begins to be guided into the hole in the upper die 14, the pressurized air in the cylinders 11, 11' is switched to be supplied and discharged, and the receiving members 9, 9' are retreated. Die 1 of upper die 14
5 and a punch 6 of the lower die 5, the overhanging portion of the workpiece is trimmed and cut into a product 16 and a scrap 17. The scrap 17 is separated by the lower surface of the die 15 and the scrap cutter 12 and is discharged into the chute 13. When the upper die 14 rises and the die 15 rises above the punch 6, the receiving members 9, 9' move forward and form a plane around the punch 6. Product 16
is pushed out from the upper mold 14 and remains on the punch 6, but since there are receiving members 9 and 9' around the punch 6, there is no risk of it tilting or falling. While the upper die 14 is rising, the product 16 is caught by the fingers of the feed bar and discharged. The work continues by repeating the above steps.

``Effects of the invention'' As is clear from the above explanation, according to the invention, a receiving member that advances and retreats toward the punch in conjunction with the lifting and lowering of the upper mold is provided, so that products with a large height relative to the trimming diameter can be produced. There is no risk of it tipping or falling over,
It has great practical effects and advantages, such as being able to handle higher press speeds because it does not require a pilot.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional plan view of the lower mold showing the embodiment, Fig. 2 is a cross-sectional view of Fig. 1 including the upper mold, and Fig. 3 is a vertical cross-section of the main part of the conventional example. 4 are plan views of main parts of other conventional examples. 1 is a punch, 2 is a pilot, 3 is a product, 4 is a trimming mold, 5 is a lower mold, 6 is a punch, 7 is a guide, 8 is a guide, 9 is a receiving member, 9A is a semicircular part, 9B is a slope, 10 1 is a bracket, 11 is a cylinder, 12 is a scrap cutter, 13 is a chute, 14 is an upper mold, 15 is a die, 16 is a product, and 17 is a scrap.

Claims (1)

[Scope of utility model registration request] In a transfer press mold, the protrusion around the opening of a cylindrical container is placed on a punch provided in the lower mold, and trimmed by a die provided in the upper mold. A pair of molds that are guided by the lower die, are arranged so that they can move forward and backward with the punch narrowly facing them, and have a semicircular part along the outer circumference of the punch on the front edge, and the height of the upper surface of which is equal to the height of the upper surface of the punch. provided on the receiving member and the lower mold,
A trimming die for a transfer press, comprising a cylinder that moves the pair of receiving members forward and backward relative to each other in conjunction with the elevation and descent of the upper die.