CN201338062Y

CN201338062Y - Automatic protective device of progressive die

Info

Publication number: CN201338062Y
Application number: CNU2009201122867U
Authority: CN
Inventors: 陈文炳; 郑弘毅; 周灿光
Original assignee: CETC PRECISION (JIA-XING) Ltd
Current assignee: CETC PRECISION (JIA-XING) Ltd
Priority date: 2009-01-09
Filing date: 2009-01-09
Publication date: 2009-11-04
Anticipated expiration: 2019-01-09

Abstract

The utility model discloses an automatic protective device of a progressive die, which has the advantages of simple and reliable structure, easy manufacturing, low cost and convenient use and has the associativity between the location of bar stock and the pressing of an upper die and a lower die. The automatic protective device comprises a pilot pin used for matching a head part and a locating hole of the bar stock; and a holddown spring is arranged at the tail part of the pilot pin. The automatic protective device is characterized in that a notch is arranged on the pole of the pilot pin; when the pilot pin is normally matched with the locating hole, a push rod hole is arranged at the position opposite to the notch; a movable push rod is arranged in the push rod hole; on end of the push rod is clamped in the notch, and the other end thereof is interlocked with a switch used for controlling the pressing of a punch. When the pilot pin is not in alignment with the locating hole, the upper die and the lower die are closed, the pilot pin props the bar stock so that the holddown spring is compressed into a die and the push rod is pushed away from the notch; and then the switch used for controlling the pressing of the punch is pressed, so that the punch does not press due to power lost, so as to prevent the die and finished pieces from not being scraped.

Description

The automatic safety device of progressive die

Technical field

The utility model relates to cold-punching mould, relates in particular to the automatic safety device of progressive die.

Background technology

Progressive die is that multiple operation such as blanking, bending, pull and stretch, punching and side cut are arranged on the different station of a mould, and blank is a continuous metal forming by multistation successively in punching course, and extremely last station becomes product.Finish different processing at each station, each station order is related, finishes a series of different punch process in the one stroke of punch press, and is therefore very accurate to the positioning requirements of workpiece at each station.Normally on mould, be provided with the correcting nail, at first go out the technology locating hole on first station of billot, in the punching press location afterwards,, position is accurately all arranged to guarantee the processing on each station with implementing punch process again behind the correcting nail aligning locating hole.But because the punching press of location and upper and lower mould does not have relevance, in many cases, because artificial maloperation, in the process that billot is sent to, correcting nail does not also enter locating hole just the situation of punch die punching press up and down, causes the malposition of mould preparation product and scraps even the phenomenon of mold damage.

The utility model content

The purpose of this utility model provides a kind of simple and reliable for structure, easy to manufacture, and cost is low, has the automatic safety device of the progressive die of relevance between the punching press of easy to use, billot location and upper and lower mould.

In order to reach above-mentioned requirements, the utility model is achieved through the following technical solutions: it includes the correcting nail that the locating hole of head and billot matches, the afterbody of correcting nail is equipped with holddown spring, it is characterized in that being shaped on breach on the correcting nail bar, in correcting nail and the timing of locating hole normal phase, breach right position be shaped on push-rod hole, movably push rod is housed in the push-rod hole, one end of push rod is stuck in the breach, and the other end interlock of push rod has the switch of control punch ram.

The automatic safety device of the progressive die of making according to such scheme; when correcting nail and locating hole not on time; and the upper and lower mould closure; the correcting screw top is lived billot compression holddown spring and is retracted in the mould; push rod is pushed away breach; then press the switch of control punch ram, make the punch press dead electricity and no longer punching press, play the effect that protection mould and product can not be scrapped.

Description of drawings

Fig. 1 is that the mould of the automatic safety device of band progressive die inserts in the billot locating hole at the correcting nail, the front view of normal feeding location back punching press;

Fig. 2 is the billot front view of band locating hole;

Fig. 3 is that the mould of the automatic safety device of band progressive die does not insert in the billot locating hole at the correcting nail, normally the front view of punching press.

Wherein: 1, billot; 2, locating hole; 3, correcting nail; 4, holddown spring; 5, groove; 6, push-rod hole; 7, push rod; 8, microswitch.

The specific embodiment

The utility model will be further described below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of the automatic safety device of progressive die.As seen from the figure, it includes the correcting nail 3 that the locating hole 2 of head and billot 1 matches as shown in Figure 2, and the afterbody of correcting nail 3 is equipped with holddown spring 4, and correcting nail 3 is ejected, follow closely on 3 bars in correcting and to be shaped on breach, described breach is meant in correcting follows closely the groove 5 that is shaped on circumferential annular on 3 bars.In correcting nail 3 and locating hole 2 normal phase timings, groove 5 right position be shaped on push-rod hole 6, movably push rod 7 is housed in the push-rod hole 6, an end of push rod 7 is stuck in the groove 5, the other end of push rod 7 withstands the microswitch 8 of control punch ram, makes push rod 7 and microswitch 8 interlocks.

If when feeding; send too precedingly or empress dowager; correcting nail 3 and locating hole 2 be not on time; when mould was closed up and down, correcting nail 3 withstood billot 1 compression holddown spring 4, and correcting nail 3 is retracted in the mould; push rod 6 is pushed away groove 5 as shown in Figure 3; then push rod 7 is pressed the microswitch 8 of control punch ram, makes the punch press dead electricity and no longer punching press, plays the effect that protection mould and product can not be scrapped.

Claims

1, the automatic safety device of progressive die; it includes the correcting nail that the locating hole of head and billot matches; the afterbody of correcting nail is equipped with holddown spring; it is characterized in that being shaped on breach on the correcting nail bar; in correcting nail and the timing of locating hole normal phase, breach right position be shaped on push-rod hole, movably push rod is housed in the push-rod hole; one end of push rod is stuck in the breach, and the other end interlock of push rod has the switch of control punch ram.

2, the automatic safety device of progressive die according to claim 1 is characterized in that described breach is meant circumferentially annular groove on the correcting nail bar.

3, the automatic safety device of progressive die according to claim 1 is characterized in that described switch is a microswitch.