A kind of valving die that can be conveniently stripped
One, technical field:
The present invention relates to Plastic Forming industry band transversal inner rib component mould pressing technology, specifically is a kind of valving die that can be conveniently stripped.
Two, background technology:
The development that spinning process has experienced decades is at present being brought into play more and more important effect in the near-net-shape of thin-walled, complex-shaped, lightweight integrated member.The large thin-wall complex component is a class part that generally adopts in Aero-Space and the weapon industry, as the nose cone of aero-engine cover, whole rocket engine member, compressor cone, artificial satellite and guided missile, the cavity liner in the weapon industry etc.The demand for development of high-tech industries such as Aero-Space is under the prerequisite that does not influence the pneumatic property of these large thin-wall member appearances, thereby the strength and stiffness that improve these parts are optimized the overall performance of aircraft, rocket and guided missile etc., for this reason need be at these part indoor design ring stiffeners, but this band transversal inner rib large thin-wall labyrinth has brought great difficulty for the shaping of member.Be that the Accurate Shaping control of the large-scale complex thin-wall member of representative has become and needs the urgent problem that solves with band transversal inner rib component mould pressing.
Domestic and international at present grasp substantially is not with interior muscle large thin-wall complex component and draw ratio is less and the rotary pressure technology of the band transversal inner rib cylindrical member that radial dimension is bigger, the composite spinning technology that the former can adopt conventional spinning and shear spinning to combine realizes that the latter then can realize by inward turning technology.But muscle does not have universality in the inward turning process forming: for the less workpiece of size, internal rotary wheel can't enter enclosure interior; For oversize workpiece, very difficult processing of die sleeve and expense are very high; And internal rolling technology only is used to the processing with interior muscle cylindrical member, the preparation more complicated of blank in the actual production at present.With with in the large complicated spinning forming process of muscle large thin-wall complex component spinning representative then need not be subjected to the restriction of above-mentioned condition, and the forming accuracy of interior muscle is than inward turning technology height.The mould pressing technology of the vertically interior muscle cylindrical member of band is grasped at present, but the forming technique of band transversal inner rib large thin-wall complex component is not both at home and abroad not on top of as yet, compare with the shaping of vertically interior muscle, the inhomogeneous deformation degree of transversal inner rib is more violent, and compacting mechanism is complicated more.Along with the development of strategic high-tech such as Aeronautics and Astronautics and weapons, an urgent demand development advanced person's band transversal inner rib large thin-wall complex component is forming technique fast and efficiently.But band transversal inner rib spinning member is difficult to the demoulding in the existence of end back owing to interior muscle that be shaped, so the design of its core and application are difficult point problems.
Three, summary of the invention:
For overcoming the spinning member that exists in the prior art, the present invention proposes a kind of valving die that can be conveniently stripped in the deficiency that is shaped and is difficult to the demoulding after finishing.
The unitary mould that the present invention proposes is formed tower by top, clamping plate, muscle mould and chuck successively from top to bottom, and the longitudinal profile of top, clamping plate and muscle mould each several part is taper.The present invention has adopted the scheme of horizontal vertical combination distinguish, and unitary mould is divided into top, clamping plate, muscle mould and chuck, and wherein the centre bore of top, clamping plate and muscle mould is a locating hole; Top, clamping plate, muscle mould and chuck are revolving parts.There is annular positioning groove at the centre of surface place that matches with clamping plate in the top.There is the positioning step that matches with locating slot on the top clamping plate upper surface center, and there is chamfering at lower surface outer rim place according to the shape of muscle in the formed thereby, and this chamfering projected length in the horizontal direction is M, and M is less than the maximum displacement L of active clamping plate at directions X; The external diameter difference S of clamping plate top and bottom is greater than zero, to guarantee that enough clamping plate take out the top, back and also can take out smoothly; Adopt vertical distinguish mode that circular clamping plate longitudinally are divided into three: active clamping plate and two passive clamping plate, wherein initiatively the profile of clamping plate is trapezoidal, and constitute the initiatively trapezoidal Di Heding of clamping plate respectively by the internal circle of clamping plate and outer circumferential edge, 1/4 circular arc of circle and 1/8 circular arc of cylindrical in the length on the end and top is respectively, promptly initiatively the horizontal profile of clamping plate is trapezoidal that interior circular arc is big, external arc is little; The clamping plate that cut off behind the clamping plate initiatively are divided into two along the center, form the passive clamping plate of two symmetries.The muscle mould is between clamping plate and chuck, and its bus is parallel to the bus of top and clamping plate, and in unitary mould surface constitutes a workpiece groove of muscle, in the mould pressing process, metal filledly go into groove, formed muscle in the workpiece.Chuck is step-like, and there is the locating shaft that connects top, clamping plate and muscle mould at its central upper portion place, and middle bench is a cone, and the bus of the bus of this cone and top and clamping plate is on the same straight line, and the bottom is cylindric, and its diameter is decided according to spinning machine.
Since each parts of the present invention be revolving parts, and core is adopted the distinguish technology of horizontal vertical combination, guarantee the demoulding smoothly behind the band transversal inner rib component mould pressing.Be easy to machining behind the core distinguish proposed by the invention, low cost of manufacture, and be easy to assembling.On the basis of horizontal distinguish, only part of clamping plate is indulged distinguish the release problems that the band transversal inner rib revolves member by force is resolved.
Four, description of drawings
Fig. 1 is the structural representation of valving die that can be conveniently stripped;
Fig. 2 is the combination distinguish schematic diagram of clamping plate;
Fig. 3 is the front view of clamping plate;
Fig. 4 is the schematic diagram that the active clamping plate are loosed core;
Fig. 5 is the passive clamping plate schematic diagrames of loosing core.Wherein:
1. top; 2. clamping plate; 3. muscle mould; 4. chuck locating shaft; 5. chuck; 6. clamping plate initiatively; 7. passive clamping plate.
Five, the specific embodiment
Present embodiment is the horizontal vertical combination valving die that is used for certain transversal inner rib large thin-wall taper member mould pressing, and the original depth of plate is 10mm in the test, and the end back Tapered Cup wall thickness that is shaped is 2mm, and muscle portion highly is 5mm, and the semi-cone angle of core is 30 °.In concrete the enforcement, mold integral is formed tower (Fig. 6) by top 1, clamping plate 2, muscle mould 3 and chuck 5 successively from top to bottom, and the longitudinal profile of top 1, clamping plate 2 and muscle mould 3 each several parts is taper.
Present embodiment has adopted the scheme of horizontal vertical combination distinguish, and unitary mould is divided into top 1, clamping plate 2, muscle mould 3 and chuck 5, and wherein the centre bore of top 1, clamping plate 2 and muscle mould 3 is a locating hole; Top 1, clamping plate 2, muscle mould 3 and chuck 5 are revolving parts.There is annular positioning groove at the centre of surface place that matches with clamping plate 2 in top 1.There is the positioning step that matches with locating slot on the top 1 clamping plate 2 upper surface centers, and there is chamfering at lower surface outer rim place according to the shape of muscle in the formed thereby, and this chamfering projected length M value in the horizontal direction is 3.83mm; The external diameter difference S value of the top and bottom of clamping plate 2 is that 2.2mm is greater than zero, to guarantee that clamping plate 2 take out top 1, back and also can take out smoothly; Adopt vertical distinguish mode that circular clamping plate 2 longitudinally are divided into three: initiatively clamping plate 6 and two passive clamping plate 7 (Fig. 7 and 8), wherein initiatively the profile of clamping plate 6 is trapezoidal, the limits of circle constitute the trapezoidal end of clamping plate initiatively 6 in the clamping plate 2, the limit of clamping plate 2 cylindricals constitutes the trapezoidal top of clamping plate initiatively 6, and promptly initiatively the horizontal profile of clamping plate 6 is trapezoidal that interior circular arc is big, external arc is little; Passive clamping plate 7 are two of symmetry, are to be divided into two from the center and to form cutting off clamping plate 2 behind the clamping plate 6 initiatively.Muscle mould 3 is between clamping plate 2 and chuck 5, doing a virtual line between top 1 and clamping plate 2 is connected the bus of top 1 with clamping plate 2, then the bus of muscle mould 3 is parallel to the bus of top 1 and clamping plate 2, and and the virtual line between the bus of top 1 and clamping plate is gapped, this gap forms a groove on the unitary mould surface, metal filledly in spinning process go into groove, formed muscle in the workpiece; Chuck 5 is step-like, and there is the locating shaft 4 that connects top 1, clamping plate and muscle mould at its central upper portion place, and middle bench is a cone, and the bus of the bus of this cone and top 1 and clamping plate is on the same straight line, and the bottom is cylindric, and its diameter is decided according to spinning machine.
When using present embodiment, the concrete steps of the demoulding are as follows:
The first step: after forming process finishes, the muscle portion of workpiece is stuck in the muscle mould of core, because mould has adopted horizontal distinguish design, so workpiece and the top 1 and the clamping plate that are stuck in the workpiece can take off from the locating shaft of chuck, but top 1 and clamping plate still are stuck in workpiece inside and can't take out by muscle in the workpiece.
Second step: active clamping plate 6 are taken out (Fig. 9) along the Y-axis negative direction from center positioning hole.
The 3rd step: after initiatively clamping plate 6 were loosed core and taken out, two passive clamping plate 7 can be in X and Y both direction freely-movable (Figure 10), and initiatively clamping plate 5 are 71mm at the maximum displacement L of directions X, and it can be taken out easily; So far, clamping plate all are removed.
The 4th step: because the design of the clamping plate interference situation of Forming Workpiece when having considered top 1 demoulding and, after clamping plate took out, top 1 also can be taken out smoothly, the just smooth demoulding of workpiece like this.
By above step, the problem that band transversal inner rib spinning workpiece can't the demoulding has obtained satisfactorily resolving, and workpiece demoulding rear surface quality is good, does not have additional deformation, can guarantee the forming quality of workpiece preferably.Facts have proved, present embodiment is disclosed to be applicable to that the core method for designing of band transversal inner rib component mould pressing is with strong points, utilize this method can scientificlly and effectively solve in the band transversal inner rib component spinning process can't the demoulding the difficult point problem, the needs that the processing of mould, installation, dismounting and application can both realistic productions.