CN201960042U - Stretching punching head used for moulding steel casing - Google Patents

Abstract

The utility model discloses a stretching punching head used for moulding a steel casing, which comprises a punching rod, a stainless-steel pipe, a tee joint and a pipe plug, wherein a center hole is arranged at the middle part of the punching rod, a water-inlet opening and a water-outlet opening are arranged on the pipe wall, the tee joint is installed at one end of the center hole, a first end of the center hole is communicated with the water-inlet opening, and the second end of the tee joint is communicated with the stainless-steel pipe, the stainless-steel pipe extends to the center hole, and a third end of the tee joint is plugged by the pipe plug; a gap is arranged the outer wall of the stainless-steel pipe and the inner wall of the center hole and is communicated with the water-outlet opening; and the center hole is a through hole, and a pore plug tightly matched with the center hole is arranged at the end part of the through hole. In the embodiment of the utility model, the through hole is arranged in the punching rod, and the pore plug tightly matched with the center hole is arranged at the an end of the through hole, therefore the processing difficulty of the punching rod is reduced, the finished product rate of the stretching punching head used for moulding a steel casing is improved, and the manufacturing cost of the stretching punching head is reduced.

Description

The stretching drift that is used for the box hat moulding

Technical field

The utility model relates to a kind of drift field, more particularly, relates to a kind of stretching drift that is used for the box hat moulding.

Background technology

Drift also is punch, patrix, formpiston, towards pin etc., drift is mounted in the metal parts in the diel, is applied to contact with the direct of material, makes material generation deformation, cuts material.Mold and punching head generally adopts high-speed steel and wolfram steel etc. as material, and high-speed steel drift and wolfram steel drift etc. are arranged.Employed when producing battery steel shell is the stretching drift, for improving the life-span of stretching drift, reduces to wear and tear to guarantee being of the required size of pressing product, often adopts the higher carbide alloy of hardness to make the stretching drift.And in process, therefore the high heat that repeated friction produced between drift and workpiece need to adopt the suitable type of cooling to control the plunger chip die operating temperature to having certain influence, high simultaneously heat that the moulding of workpiece is also had very big influence the service life of drift.

At present, in order to control the operating temperature of drift, structure as shown in Figure 1, this stretching drift comprises: jumper bar 11, stainless steel tube 14, threeway 12 and pipe close 13, wherein, jumper bar 11 middle parts are provided with centre bore 113, and its tube wall is provided with water inlet 111 and delivery port 112; Threeway 12 is installed in an end of centre bore 113, and its first end is connected with water inlet 111, and second end is connected with stainless steel tube 14, and stainless steel tube 14 extends in the centre bore 113 smoothly, and the 3rd end is blocked by pipe close 13; Have certain clearance 114 between stainless steel tube 14 outer walls and centre bore 113 inwalls, this gap 114 can be connected with delivery port 112.Work smoothly for the drift that guarantees to stretch, the centre bore 113 on the jumper bar 11 is a blind hole.

Water inlet 111 taps into water pipe when cooling, and delivery port 112 picks out water pipe, and cooling water enters jumper bar 11 inside by water inlet pipe, absorbs jumper bar 11 through fricative a large amount of heats, and dispels the heat to the outside by outlet pipe.Cooling water is constantly input and output in a steady stream, can make jumper bar 11 maintain comparatively desirable temperature range when work, have prolonged the service life of drift.But because the centre bore 113 on the jumper bar 11 is that blind hole and material are carbide alloy, so difficulty of processing is big, and yield rate is very low, has increased the manufacturing cost of stretching drift.

The utility model content

In view of this, the utility model provides a kind of stretching drift that is used for the box hat moulding, to increase the yield rate of stretching drift, reduces the manufacturing cost of stretching drift.

For achieving the above object, the utility model provides following technical scheme:

A kind of stretching drift that is used for the box hat moulding comprises jumper bar, stainless steel tube, threeway and pipe close, and wherein, described jumper bar middle part is provided with centre bore, and its tube wall is provided with water inlet and delivery port; Described threeway is installed on an end of described centre bore, and its first end is connected with described water inlet, and second end is connected with described stainless steel tube, and described stainless steel tube extends in the centre bore, and the 3rd end is blocked by described pipe close; Have the gap between described stainless steel tube outer wall and the described center bore inner wall, this gap can be connected with delivery port, and described centre bore is a through hole, and its end is provided with and the close-fitting stopple of described centre bore.

Preferably, at the above-mentioned stretching drift that is used for the box hat moulding, described stopple and described centre bore are interference fit.

Preferably, at the above-mentioned stretching drift that is used for the box hat moulding, the end that described through hole is provided with stopple is a taper hole.

From technique scheme as can be seen, among the utility model embodiment jumper bar is arranged to through hole, and be provided with stopple close-fitting with it at an end of through hole, therefore reduced the difficulty of processing of jumper bar, improve the stretching drift yield rate that is used for the box hat moulding, reduced the manufacturing cost of stretching drift.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is for being used for the structural representation of the stretching drift of box hat moulding in the prior art;

The stretching punch structure schematic diagram that is used for the box hat moulding that Fig. 2 provides for the utility model embodiment;

The jumper bar structural representation that Fig. 3 provides for the utility model embodiment;

The stopple structural representation that Fig. 4 provides for the utility model embodiment;

The stopple force analysis figure that Fig. 5 provides for the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model discloses a kind of stretching drift that is used for the box hat moulding,, reduce the manufacturing cost of stretching drift to increase the yield rate of stretching drift.

Please refer to shown in Figure 2ly, the stretching drift that this is used for the box hat moulding comprises jumper bar 21, stainless steel tube 24, threeway 22 and pipe close 23, and wherein, jumper bar 21 middle parts are provided with centre bore 213, and its tube wall is provided with water inlet 211 and delivery port 212; Threeway 22 is installed on an end of described centre bore 213, and its first end is connected with water inlet 211, and second end is connected with stainless steel tube 24, and stainless steel tube 24 extends in the centre bore 213, and the 3rd end is blocked by pipe close 23; Have gap 214 between stainless steel tube 24 outer walls and centre bore 213 inwalls, this gap 214 can be connected with delivery port 212, and centre bore 213 is a through hole, and its end is provided with and described centre bore 213 close-fitting stopples 25.

Water inlet 211 taps into water pipe when cooling, and delivery port 212 picks out water pipe, and cooling water enters jumper bar 21 inside by water inlet pipe, absorbs jumper bar 21 through fricative a large amount of heats, and dispels the heat to the outside by outlet pipe.Cooling water is constantly input and output in a steady stream, can make jumper bar 21 maintain comparatively desirable temperature range when work, have prolonged the service life of drift.

Among the utility model embodiment jumper bar 21 is arranged to through hole, and be provided with stopple 25 close-fitting with it at an end of through hole, therefore reduce the difficulty of processing of jumper bar 21, improved the stretching drift yield rate that is used for the box hat moulding, reduced the manufacturing cost of stretching drift.

Stopple 25 main effects are to prevent that centre bore 213 from leaking in the utility model embodiment, its type of attachment has multiple, concrete: can on stopple 25 external screw thread be set, through hole is provided with internal thread with stopple 25 places of matching, and the fit form by screw thread is installed in stopple 25 on the jumper bar 21.

In addition, the diameter of stopple 25 can be more bigger than jumper bar 21, on stopple 25 internal thread is set, and jumper bar 21 is provided with external screw thread with stopple 25 places of matching, and the fit form by screw thread is installed in stopple 25 on the jumper bar 21.

In above-mentioned two kinds of installation forms, external screw thread and screw-internal thread fit place also can be provided with seal washer in order to prevent to leak.But, because of material is a carbide alloy, be provided with above that the screw thread difficulty is big, cost is high, generally do not adopt.

In order further to simplify procedure, the fit form of stopple 25 and jumper bar 21 is an interference fit, realizes the installation of stopple 25.In order to prevent that stopple 25 is recessed in the punching course, in the embodiment of the invention, the end that through hole is provided with stopple 25 is a taper hole, and promptly the fit form of stopple 25 and jumper bar 21 is a cone match; In order to prevent that stopple 25 comes off in the punching course, by the fit angle realization self-locking of control taper hole and stopple 25

As shown in Figure 3 and Figure 4, the angle of the cross section of stopple 25 is α, and taper hole cross section angle also is α simultaneously.Stopple 25 force analysis are as shown in Figure 5:

$f_1\cos \frac{\mathrm{\α}}{2}+.f_2\cos \frac{\mathrm{\α}}{2}\≥N_1\sin \frac{\mathrm{\α}}{2}+N_2\sin \frac{\mathrm{\α}}{2}+G$ ①

$f_1\sin \frac{\mathrm{\α}}{2}+N_1\cos \frac{\mathrm{\α}}{2}=f_2\sin \frac{\mathrm{\α}}{2}+N_2\cos \frac{\mathrm{\α}}{2}$ ②

f ₁＝N ₁k ③

f ₂＝N ₂k ④

N ₁＝N ₂ ⑤

Get α≤2arctank by above-mentioned formula.

Therefore for different carbide alloy since different its self-locking angle differences of material no longer discuss at this.

For the influence that reduces to expand with heat and contract with cold and bring, stopple 25 and stretching drift material therefor are the carbide alloy with the trade mark.Under the prerequisite of the fineness of stopple 25 outer surfaces and taper hole inner surface, use the red lead powder lapping-in before being pressed in the assurance, get contact area and be not less than 90%.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (3)

1. a stretching drift that is used for the box hat moulding comprises jumper bar, stainless steel tube, threeway and pipe close, and wherein, described jumper bar middle part is provided with centre bore, and its tube wall is provided with water inlet and delivery port; Described threeway is installed on an end of described centre bore, and first end of described threeway is connected with described water inlet, and second end is connected with described stainless steel tube, and described stainless steel tube extends in the centre bore, and the 3rd end is blocked by pipe close; Have the gap between described stainless steel tube outer wall and the described center bore inner wall, this gap can be connected with delivery port, it is characterized in that, described centre bore is a through hole, and its end is provided with and the close-fitting stopple of described centre bore.

2. the stretching drift that is used for the box hat moulding according to claim 1 is characterized in that described stopple and described centre bore are interference fit.

3. the stretching drift that is used for the box hat moulding according to claim 1 is characterized in that, the end that described through hole is provided with stopple is a taper hole.

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