CN105583346A

CN105583346A - Horizontal double-end sliding ejection pin for cold heading

Info

Publication number: CN105583346A
Application number: CN201510910976.7A
Authority: CN
Inventors: 赵永捷
Original assignee: Chonqing Fuyue Technology Co Ltd
Current assignee: Chonqing Fuyue Technology Co Ltd
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2016-05-18

Abstract

The invention provides a horizontal double-end sliding ejection pin for cold heading. The horizontal double-end sliding ejection pin comprises a cylindrical body divided into an upper ejection pin, an ejection pin base and a lower ejection pin, wherein the upper ejection pin, the ejection pin base and the lower ejection pin are cylindrical, the upper ejection pin and the lower ejection pin have the same length and the same diameter, and the diameter of the ejection pin base is greater than the diameter of the upper ejection pin. Because the ejection pin is of a double-end structure, a fixed die can undergo cold heading operation in two directions, an opposite work-piece can be ejected from the fixed die through the cold heading action in one direction, and the purposes of making full use of the resources and utilizing the return time are realized.

Description

Horizontal double end cold-heading slip thimble

Technical field

The present invention relates to a kind of thimble of cold-heading molding, be specifically related to a kind of horizontal double end cold-heading slip thimble.

Background technology

Cold-heading is to utilize the mould forging method to metal bar material upsetting formation at normal temperatures. Be commonly used to manufacture the head of screw, bolt, rivet etc. Can reduce or replace machining. Forging stock material can be copper, aluminium, carbon steel, steel alloy, stainless steel and titanium alloy etc., and stock utilization can reach 80～90%. Cold-heading is many to be carried out on special cold headers, is convenient to realize continuously, multistation, automated production. Bar is sent certain depth automatically by feed mechanism, and shut-off mechanism is cut into blank, is then delivered to successively and is built up swaging and punching station and carry out cold upset forming by clamp transport mechanism. The major advantage of cold-heading: cold-heading can be processed into and be suitable for compared with small load and shorter span. Process and can obtain economically unusual cross sectional shape by cold-heading, obtain gratifying strength-weight ratio. Consider the tight type of packaging and transport, can produce nestable cross section. The impact of non-telescope deformation under environment Action of Gravity Field.

At present, in cold-heading processing, the normal device using is spring punch die. General spring punch die vertically arranges, and is wherein provided with a thimble that doubles as heading. But for the strict size of controlling the workpiece after cold-heading, the length that general thimble stretches in die cavity is a fixing value, just bar cold-heading can be become to workpiece after thimble inserts die cavity completely. After workpiece cold-heading molding, need to will in its driven die cavity, take out, in general, the comparatively regular workpiece of shape can automatically come off under the effect of gravity from die cavity, realizes stripping operation. But, adding man-hour for special workpiece, bar is after cold-heading, and partial cross section is long-pending becomes large, can in die cavity, occur the phenomenon containing material. Add workpiece deadweight less, can not under the effect of self gravitation, workpiece be deviate from from die cavity. While running into this workpiece, after cold-heading, thimble need to be exited from spring punch die, with in another longer push rod insertion die cavity, workpiece be ejected. This mode, not only wastes time and energy, and at every turn repeatedly inserts push rod and thimble all faces a problem of reorientating, once location is inaccurate, can causes the deflection of push rod or thimble or even fracture when insertion. Moreover conventional cold-heading mechanism is all vertical setting, vertically arranging is mainly that cold-heading operation is carried out in the deadweight that will make full use of equipment. But, the vertical cold-heading mechanism arranging, the action that can not effectively utilize thimble backhaul more operates, and has in fact caused the waste on time and power.

Summary of the invention

The object of the present invention is to provide a kind of horizontal double end cold-heading slip thimble, adopt the thimble structure of improvement, in the process of cold-heading, utilize thimble in cover half to complete cold-heading to bar and the pusher action of shaping workpiece.

For achieving the above object, technical scheme of the present invention is: horizontal double end cold-heading slip thimble, comprise the body of cylindricality, described body is divided into three sections, be followed successively by thimble, thimble seat and lower thimble, described upper thimble, thimble seat and lower thimble are all cylindrical, and described upper thimble is identical with the length of lower thimble, described upper thimble is identical with the diameter of lower thimble, and the diameter of described thimble seat is greater than the diameter of thimble.

While adopting technique scheme, traditional thimble is arranged to bipitch structure, and changes the thimble in cover half into movable state from inactive state. Because thimble is arranged to after bipitch structure, can carry out two-way cold-heading operation to cover half, and utilize the action of a direction cold-heading that the workpiece on opposite is ejected from cover half, reach the object that makes full use of resource and utilize return interval. Concrete, thimble seat is merely able to slide in thimble seat chamber, and in the time that thimble seat touches thimble seat chamber wall, thimble seat chamber wall has one to support and position-limiting action to thimble seat, make thimble can bear the pressure of cold-heading, this pressure is delivered on thimble seat chamber wall and then the fixing body of the level that passes to. On the other hand; thimble seat slides in thimble seat chamber; the distance of its slip finally shows that the thimble of opposite side stretches in the length in thimble chamber; in the time that thimble maximum stretches into thimble chamber; the workpiece of moulding in thimble chamber will be ejected, avoiding workpiece card to be placed in thimble chamber needs independent step and structure to be ejected, and has not only saved the step of processing; liftout operation is carried out in the gap that also takes full advantage of dynamic model backhaul in process, has and important progressive meaning.

Further improvement project, for solve the processing of thimble seat and use in matching problem, the axis conllinear of described upper thimble, thimble seat and lower thimble. Above-mentioned setting, can work in-process utilize the mode of circumgyration incision to process thimble seat and the thimble structure of one, and in use, thimble seat chamber coordinate with thimble seat, make thimble seat be applied to pressure on the wall of thimble seat chamber comparatively even, prevent from causing stress raisers.

Further improvement project, in order to take into account thimble seat and intensity thimble, and needs structure reasonable in design to seek the balance of mechanical property and processing cost, and the diameter of described thimble seat is the twice of upper thimble diameter.

Further improvement project, the length of described upper thimble is 2 times of thimble seat length.

Further improvement project, described upper thimble, thimble seat and lower thimble are one-body molded.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:

Fig. 1 is the structural representation of the horizontal double end cold-heading of the present invention slip thimble embodiment;

Fig. 2 is the use view of thimble in Fig. 1.

Detailed description of the invention

Reference numeral: upper thimble 1, thimble seat 2, lower thimble 3, cover half 4, thimble chamber 41, cold-heading chamber 42, thimble seat chamber 43, inserts 5, shaping workpiece 6.

As shown in Figure 1, the horizontal double end cold-heading of the present invention slip thimble, has been divided into three sections, falls down to be followed successively by thimble 1 from above, thimble seat 2 and lower thimble 3. Wherein, upper thimble 1, thimble seat 2 and lower thimble 3 are integrated cylindrical, and upper thimble 1 is identical with the diameter of lower thimble 3, and the diameter of thimble seat 2 is greater than the diameter of upper and lower thimble, and the axis conllinear of upper thimble 1, thimble seat 2 and lower thimble 3.

As shown in Figure 2, when use, whole thimble is the cover half 4 that is arranged in hollow, and on the lateral wall of cover half 4, correspondence is provided with corresponding fixed structure, for cover half 4 is fixed on to mount pad. Whole cover half 4 can be made with metal, forms a passage running through in cover half 4. This passage is divided into thimble chamber 41 and cold-heading chamber 42, and thimble chamber 41 is near the stage casing of cover half 4, and 42 points, cold-heading chamber is located at the both ends of cover half 4. In cover half 4, the wall place, chamber that is positioned at cold-heading chamber 42 is inlaid with inserts 5, and 5 the hardness of inserting is greater than the hardness of cover half 4, while carrying out workpiece cold-heading molding, 5 can prevent from cover half 4 to cause wearing and tearing by inserting in cold-heading chamber 42. Be formed with a thimble seat chamber 43 that sectional area is larger at the middle part in thimble chamber 41. Thimble seat 2 is arranged in thimble seat chamber 43, and thimble seat 2 can slide at thimble seat chamber 43 cathetus. Wherein, the length of thimble seat 2, thimble seat chamber 43, upper thimble 1 and lower thimble 3 also has a matching relationship. Specifically, as shown in the position that Fig. 1 put, in the time that the bottom surface of thimble seat 2 contacts with the inner bottom surface in thimble seat chamber 43, the bottom transition of lower thimble 3 is stretched in the thimble chamber 41 of cover half 4 bottoms, and shaping workpiece 6 in the thimble chamber 41 of bottom is ejected; Under this state, the upper end of upper thimble 1 is normally stretched in the thimble chamber 41 on cover half 4 tops, and at this moment, the upper end of thimble 3 forms the cold-heading bottom surface in the thimble chamber 41 on cover half 4 tops, and upper thimble 1 passes to thimble seat chamber 43 by pressure by the bottom surface of thimble seat 2, and then pass to cover half 4.

Whole cover half 4 is horizontal positioned, and for convenience of description, the upper-lower position of putting for Fig. 2 is set forth. Bar to be processed is inserted in the thimble chamber 41 on top after by upper dynamic model gripping, and upper dynamic model applies cold-heading pressure, make bar withstand thimble 1, by upper thimble 1, thimble seat 2 is promoted, can not move until thimble seat 2 withstands on the chamber wall in thimble seat chamber 43, simultaneously the lower thimble 3 of thimble seat 2 bottoms by the thimble chamber 41 of bottom the shaping workpiece 6 of cold-heading molding eject. Upper dynamic model continues to apply cold-heading pressure, by bar cold-heading molding in the thimble chamber 41 on top. Go up afterwards dynamic model and exit, shaping workpiece 6 may can not exit automatically because be stuck in containing the reason of material in the thimble chamber 41 on top. The lower dynamic model of operation inserts bar to be processed in the thimble chamber 41 of bottom after by lower dynamic model gripping, and lower dynamic model applies cold-heading pressure, make bar withstand lower thimble 3, by lower thimble 3, thimble seat 2 is upwards promoted, until withstanding on the chamber wall in thimble seat chamber 43, can not move thimble seat 2, simultaneously the upper thimble 1 on thimble seat 2 tops by the thimble chamber 41 on top the shaping workpiece 6 of cold-heading molding eject, lower dynamic model continues to apply cold-heading pressure, by bar cold-heading molding in the thimble chamber 41 of bottom. Replace above-mentioned action, realize the operation of cold-heading molding and automatic material returning on cold-heading cover half.

Bipitch structure is arranged to by traditional thimble by the present invention, and change the thimble in cover half 3 into movable state from inactive state. Because thimble is arranged to after bipitch structure, can carry out two-way cold-heading operation to cover half, and utilize the action of a direction cold-heading that the workpiece on opposite is ejected from cover half, reach the object that makes full use of resource and utilize return interval. Concrete, in the thimble chamber 41 at cover half 4 middle parts, increase a thimble seat chamber 43, thimble seat 2 is merely able in the interior slip in thimble seat chamber 43, and in the time that thimble seat 2 touches thimble seat chamber 43 wall, thimble seat chamber 43 walls have one to support and position-limiting action to thimble seat 2, make thimble 3 can bear the pressure of cold-heading, this pressure is delivered on thimble seat chamber 43 walls and then the fixing cover half 4 of the level that passes to. On the other hand; thimble seat 2 slides in thimble seat chamber 43; the distance of its slip finally shows that the thimble 3 of opposite side stretches in the length in thimble chamber 41; in the time that thimble maximum stretches into thimble chamber 41; the workpiece of moulding in thimble chamber 41 will be ejected, avoiding workpiece card to be placed in thimble chamber 41 needs independent step and structure to be ejected, and has not only saved the step of processing; liftout operation is carried out in the gap that also takes full advantage of dynamic model backhaul in process, has and important progressive meaning.

Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; without departing from the inventive concept of the premise; can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.

Claims

1. horizontal double end cold-heading slip thimble, comprise the body of cylindricality, it is characterized in that, described body is divided into three sections, be followed successively by thimble, thimble seat and lower thimble, described upper thimble, thimble seat and lower thimble are all cylindrical, and described upper thimble is identical with the length of lower thimble, described upper thimble is identical with the diameter of lower thimble, and the diameter of described thimble seat is greater than the diameter of thimble.

2. horizontal double end cold-heading slip thimble according to claim 1, is characterized in that the axis conllinear of described upper thimble, thimble seat and lower thimble.

3. horizontal double end cold-heading slip thimble according to claim 2, is characterized in that, the diameter of described thimble seat is the twice of upper thimble diameter.

4. horizontal double end cold-heading slip thimble according to claim 1, is characterized in that, the length of described upper thimble is 2 times of thimble seat length.

5. horizontal double end cold-heading slip thimble according to claim 1, is characterized in that, described upper thimble, thimble seat and lower thimble are one-body molded.