CN201659198U

CN201659198U - Counter bore processing mold of iron elements by free centering counter bore forming method

Info

Publication number: CN201659198U
Application number: CN2010200592181U
Authority: CN
Inventors: 何梅钦; 何传强; 曹象钦; 陈昌腾
Original assignee: FUQING YIXIN MACHINE Co Ltd
Current assignee: FUQING YIXIN MACHINE Co Ltd
Priority date: 2010-01-07
Filing date: 2010-01-07
Publication date: 2010-12-01
Anticipated expiration: 2020-01-07

Abstract

The utility model discloses a counter bore processing mold of iron elements by a free centering counter bore forming method, which comprises a fixed plate, a material tripping plate and a lower mold plate, wherein a counter bore punching needle passes through the fixed plate and the material tripping plate, the head part of the counter bore punching needle is in a profile modeling mode, and extends out a certain length after passing through the bottom end surface of the material tripping plate to mutually correspond to the depth of a counter bore, single-edge matched gaps among the counter bore punching needle, the fixed plate and the material tripping plate are a little greater than the product positioning tolerance, so the counter bore punching needle is in a horizontally movable state. After the utility model adopts the structure, the counter bore punching needle is in the horizontally movable state in a template, the singe-edge matched gaps among the counter bore punching needle, the fixed plate and the material tripping plate are a little greater than the product positioning tolerance, the profile modeling design of the head part of the counter bore punching needle is matched, the uniform contact between the profile modeling surface of the head part of the counter bore punching needle and the edges of pre-punching holes is used for making the counter bore punching needle properly move and directly realize the centering effect in the template in the forming moment, the accurate forming of the counter bore can be ensured, in addition, burrs can not be easily generated, the quality of the counter bore is improved, and the service life of the mold is prolonged.

Description

A kind of counterbore processing mold of the free centering counterbore method of forming of ironware

Technical field the utility model relates to a kind of processing mold of ironware, relates in particular to a kind of counterbore processing mold of the free centering counterbore method of forming of ironware.

Background technology is present, the counterbore processing mold of ironware commonly used, as depicted in figs. 1 and 2, this counterbore processing mold mainly adopts the rigidity counterbore method of forming, it is divided into two steps when processing, vertical 2, the second steps of pre-punched hole of first step punching out on workpiece 1 are at vertical pre-punched hole 2 position punching out counterbores 3.Wherein the guiding counterbore is fastened on the fixed head 5 towards pin 9 in second step, and the length at its drift position 90 makes it can pass workpiece 1 and enters in the pilot hole of offering on the lower bolster 6 60.Because the guiding counterbore is fixed on the fixed head 5 in fastening mode towards pin 9 in this method, 60 pairs of guiding of the pilot hole counterbore that only utilizes lower bolster 6 to offer carries out centering by force towards pin 9, be easy to generate burr in the counterbore of the uneven and processing of the counterbore accuracy of form and position in its production process, make its effect desirable not to the utmost.

Summary of the invention the utility model provides a kind of counterbore moulding the accurate and difficult counterbore processing mold that produces the free centering counterbore method of forming of burr at problems of the prior art.

For addressing the above problem, the utility model comprises fixed head, stripper plate, lower bolster, and counterbore passes fixed head, stripper plate towards pin, and described counterbore is towards the head profiling of pin, and its bottom face that passes stripper plate stretches out certain length, and is corresponding with the degree of depth of counterbore; Counterbore is slightly larger than the product orientation tolerance towards the monolateral fit clearance between pin and fixed head, the stripper plate, makes counterbore be in the state of horizontal anomalous movement towards pin.

After the utility model adopts said structure, counterbore is in the horizontal anomalous movement state towards pin in template, the monolateral fit clearance of itself and fixed head, stripper plate is slightly larger than the product orientation tolerance, cooperate the contoured design of counterbore towards needle section, moulding moment, the dependence counterbore makes counterbore towards pin mobile in right amount, direct centering in template towards the imitation profile of needle section and the even contact at pre-punched hole edge, guarantees the accurate and difficult generation burr of counterbore moulding, has improved the quality of counterbore and the service life of mould.

In order to make counterbore more accurate towards cooperating between pin and the template, counterbore of the present utility model is 0.25 millimeter towards the monolateral fit clearance between pin and fixed head, the stripper plate.

In sum, the utility model utilizes counterbore towards the monolateral gap that is equipped with between pin and fixed head, the stripper plate, cooperates the contoured design of counterbore towards needle section, makes mould possess the counterbore moulding accurately and be difficult for producing the advantage of burr, helps promoting and produces.

Description of drawings is described in further detail the utility model below in conjunction with the drawings and specific embodiments:

Fig. 1 is the part mould generalized section of the first step of the prior art rigidity counterbore method of forming;

Fig. 2 is the part mould generalized section in second step of the prior art rigidity counterbore method of forming;

Fig. 3 is a part mould generalized section of the present utility model.

The specific embodiment as shown in Figure 3, the utility model comprises fixed head 5, stripper plate 7, lower bolster 6, and counterbore passes fixed head 5, stripper plate 7 towards pin 4, and described counterbore is towards head 41 profilings of pin 4, its bottom face that passes stripper plate 7 stretches out certain length, and is corresponding with the degree of depth of counterbore 3; Counterbore is slightly larger than the product orientation tolerance towards the monolateral fit clearance 8 between pin 4 and fixed head 5, the stripper plate 7, makes counterbore be in the state of horizontal anomalous movement towards pin 4.

Counterbore in the utility model is 0.25 millimeter towards the monolateral fit clearance 8 between pin 4 and fixed head 5, the stripper plate 7.

Claims

1. the counterbore processing mold of the free centering counterbore method of forming of an ironware, comprise fixed head, stripper plate, lower bolster, counterbore passes fixed head, stripper plate towards pin, it is characterized in that: counterbore stretches out certain length towards the bottom face that the head of pin passes stripper plate, and is corresponding with the degree of depth of counterbore; Counterbore is slightly larger than the product orientation tolerance towards the monolateral fit clearance between pin and fixed head, the stripper plate, makes counterbore be in the state of horizontal anomalous movement towards pin.

2. the counterbore processing mold of the free centering counterbore method of forming of a kind of ironware according to claim 1 is characterized in that: described counterbore is 0.25 millimeter towards the monolateral fit clearance between pin and fixed head, the stripper plate.