CN203227748U

CN203227748U - Composite thermoforming mould

Info

Publication number: CN203227748U
Application number: CN 201320225049
Authority: CN
Inventors: 陈光兴; 许红平
Original assignee: Shanghai Superior Die Technology Co Ltd
Current assignee: Shanghai Superior Die Technology Co Ltd
Priority date: 2013-04-28
Filing date: 2013-04-28
Publication date: 2013-10-09
Anticipated expiration: 2023-04-28

Abstract

The utility model provides a composite thermoforming mould comprising an upper mould base and a lower mould base. A male mould and a female mould corresponding to each other are arranged on the upper mould base and the lower mould base respectively, profiles of the male mould and the female mould are curved surfaces in smooth transition, an insert is arranged on each side of the female die, and a driving device driving each insert to move up and down is connected below each insert. When the inserts move to a travel destination, the profile of the female mould and the upper surfaces of the inserts form a concave surface matching with the profile of the female mould together. The two inserts act on sheet metal one after another to enable the sheet metal to be in contact with the profiles of the mould sufficiently and more stably in a forming process, so that sheet metal formability is improved while high debugging efficiency is obtained, the whole forming process is regular, local crinkling can be inhibited, and cracking such as deep convex hulls on profiles of some products can be prevented.

Description

Compound hot-forming die

Technical field

The utility model relates to die forming, relates in particular to a kind of compound hot-forming die.

Background technology

Along with the control of automotive safety and environmental regulation is more and more tighter, motor corporation progressively reduces oil consumption by automobile lightweight technology and reduces toxic emission in recent years, and wherein a kind of approach uses the hot forming technology that high-strength steel sheet is formed exactly.Its principle is that boron plate is heated to more than the austenitic temperature interval, is transported to fast on the hot-forming die, in drawing, plate is quenched, and obtains the part of complete martensitic structure, makes part reach other tensile strength of 1500MPa level.Because it has superhigh intensity, the hot forming part extensively is applied to the body in white structural member gradually, realizes more light-weighted product design when guaranteeing structural strength, and for the fuel economy that improves automobile, it is significant to promote energy-saving and emission-reduction.

Be different from general cold punching die, in order to meet the requirements of mechanical performance, plate finishes must being shaped in mould before the martensite phase transformation after the heating, more stable when this just requires plate to enter mold cavity, simultaneously in forming process up and down the contact condition of profile and plate also determining the formability that product is final.

The utility model content

The shortcoming of prior art in view of the above, the purpose of this utility model are to provide a kind of compound hot-forming die that promotes the plate shape stability and shorten debug time, are used for solving the problems of the prior art.

Reach other relevant purposes for achieving the above object, the utility model provides a kind of compound hot-forming die, comprise upper bolster and die shoe, be respectively equipped with corresponding punch and die on described upper bolster, the die shoe, and the profile of described punch and die is the curved surface that seamlessly transits, a tray is respectively established in described die both sides, described tray below is connected with and drives its drive unit that moves up and down, when described tray moves to the stroke end, the concave surface that the common formation of described die profile and tray upper surface and punch profile match.

Further, the stroke difference of two described trays.

Further, described drive unit comprises the backing-out punch that is connected the tray below, and described backing-out punch is slidingly installed in the backing-out punch seat, and described backing-out punch seat is installed on the die shoe.

Further, described backing-out punch lower end is connected with the press air cushion by push rod.

Further, be provided with guide plate between described backing-out punch and backing-out punch seat.

By above technical scheme, the utility model is by respectively establishing a tray that can move up and down in the die both sides, and the stroke difference of two trays, before punch and the complete pressing of die, act on plate after two tray one elder generations one, plate can more stably fully be contacted with die face in forming process, thereby when promoting stamping formability, obtain higher debugging efficiency, whole forming process is more regular, and can suppress local wrinkling, can also prevent the cracking of convex closure category feature darker relatively on some product profiles.

Description of drawings

Fig. 1 is the cutaway view of the utility model embodiment.

Fig. 2 is the schematic diagram of the utility model motion process top dead-centre.

The schematic diagram that Fig. 3 starts working for first tray in the utility model.

The schematic diagram that Fig. 4 starts working for second tray in the utility model.

Fig. 5 is the schematic diagram of the utility model motion process bottom dead centre.

The element numbers explanation:

1 upper bolster

2 die shoes

3 punch

4 dies

5 trays

51 first trays

52 second trays

6 backing-out punch

7 push rods

8 guide plates

9 plates

10 backing-out punch seats

The specific embodiment

Below by particular specific embodiment embodiment of the present utility model is described, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.

See also Fig. 1 to Fig. 5.Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not in order to limit the enforceable qualifications of the utility model, so technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not influencing under the effect that the utility model can produce and the purpose that can reach, all should still drop on the technology contents that the utility model discloses and get in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under no essence change technology contents, when also being considered as the enforceable category of the utility model.

Fig. 1 to Fig. 5 shows a kind of embodiment of the compound hot-forming die of the utility model, as shown in Figure 1, comprise upper bolster 1 and die shoe 2, described upper bolster 1, be respectively equipped with corresponding punch 3 and die 4 on the die shoe 2, and the profile of punch 3 and die 4 is the curved surface that seamlessly transits, respectively establish a tray 5 in the die both sides, the tray below is connected with and drives the drive unit that moves under its in the vertical direction, drive unit comprises the backing-out punch 6 that is connected the tray below, described backing-out punch 6 is slidingly installed in the backing-out punch seat 10, backing-out punch seat 10 is installed on the die shoe, and the backing-out punch lower end is connected with the press air cushion by push rod 7.Two backing-out punch are provided with different strokes, the power of press positice ground effect on backing-out punch is also different, by the press air cushion can single control push rod ejection stroke, guarantee that two trays are highly met binder surface fluctuating requirement by jack-up, namely when described tray moved to the stroke end, described die profile and tray upper surface constituted the concave surface that matches with the punch profile jointly.In the hot forming process, by about two travel settings that backing-out punch is different, act on plate after two tray one elder generations one, plate can more stably fully be contacted with die face in forming process, thereby when promoting stamping formability, obtain higher debugging efficiency.

Simultaneously, be provided with guide plate 8 between the inner surface of the outer rim of backing-out punch 6 and backing-out punch seat 10, guide plate 8 has been guaranteed the precision of backing-out punch motion.

Be further described below in conjunction with the concrete course of work:

As shown in Figure 2, during top dead-centre, first tray 51 of die 4 both sides and second tray 52 be difference jack-up differing heights under the backing-out punch effect.Compare with the mould structure that does not have tray, the upper surface of tray can play the effect of holding plate 9 during top dead-centre, and the position of tray is in two of plate length direction, therefore the contact area of plate and concave surface increases greatly, promoted plate stability in mold cavity before being shaped, for shaping is afterwards got ready.

As shown in Figure 3, Figure 4, it is descending that upper bolster 1 drives punch 3, and the left profile lower contacts with bigger first tray 51 of counterdie ejection stroke earlier, and the left side plate begins shaping.Along with punch 3 continuation are descending, first tray 51 in left side is under pressure and moves downward with punch, and plate has the process of a gradual change from left to right.When first tray 51 in left side dropped to the ejection height consistent with second tray 52 on right side, the right profile of punch began to contact second tray 52 on die right side, continued to be shaped downwards under punch profile and concave surface acting in conjunction in two ends, the plate left and right sides.Use the tray structure that acts on plate after two first can guarantee that plate is more regular more easy to control in forming process.

As shown in Figure 5, punch 1, first tray 51 and second tray, 52 final DL synchronizations are to the mould closure state, and the upper surface of die profile and first tray, second tray has constituted the counterdie profile jointly, and namely concave surface is corresponding with the punch profile, and sheet forming finishes.

In sum, the utility model acts on plate after one earlier by two trays one, plate can more stably fully be contacted with die face in forming process, thereby when promoting stamping formability, obtain higher debugging efficiency, whole forming process is more regular, and can suppress local wrinkling, can also prevent the cracking of convex closure category feature darker relatively on some product profiles.So the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.

Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not is used for restriction the utility model.Any person skilled in the art scholar all can be under spirit of the present utility model and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.

Claims

1. compound hot-forming die, comprise upper bolster and die shoe, be respectively equipped with corresponding punch and die on described upper bolster, the die shoe, and the profile of described punch and die is the curved surface that seamlessly transits, it is characterized in that a tray is respectively established in described die both sides, described tray below is connected with and drives its drive unit that moves up and down, when described tray moves to the stroke end, the concave surface that the common formation of described die profile and tray upper surface and punch profile match.

2. compound hot-forming die according to claim 1 is characterized in that, the stroke difference of two described trays.

3. compound hot-forming die according to claim 1 is characterized in that, described drive unit comprises the backing-out punch that is connected the tray below, and described backing-out punch is slidingly installed in the backing-out punch seat, and described backing-out punch seat is installed on the die shoe.

4. compound hot-forming die according to claim 3 is characterized in that, described backing-out punch lower end is connected with the press air cushion by push rod.

5. compound hot-forming die according to claim 3 is characterized in that, is provided with guide plate between described backing-out punch and backing-out punch seat.