CN110064702A - One kind being used for the stamping forming composable mold of outer covering piece and its moulding process - Google Patents

Abstract

The invention discloses a combined die for stamping and forming an outer cover, which comprises an upper die body and a lower die base, the lower part of the upper die body is provided with a pressing material core and a trimming knife block, and the lower die base is on the lower die base. The punch is provided with a punch, and also includes a punching assembly, the punching assembly includes a wedge pad, a punch guide plate, a driving guide sleeve, a punch connecting column and a punching punch set at the lower end of the punch connecting column. The driving guide sleeve is obliquely arranged on the pressing material core, the punch connecting column is movably arranged in the driving guide sleeve, the punch guiding plate is correspondingly arranged on the upper end of the punch connecting column, and the upper die body is provided with a wedge. , the upper surface of the wedge pad corresponds to the wedge set, and the lower surface of the wedge pad corresponds to the punch guide plate. Trimming and punching can be completed in one process, reducing the mold process and reducing the cost of mold production.

Description

A combined die for stamping and forming of outer cover and its forming process

technical field

The invention relates to the technical field of stamping dies, in particular to a combined die for stamping and forming an outer cover and a forming process thereof.

Background technique

The main parts of the stamping die for large outer cover parts of automobiles, such as the side wall die, to complete the correcting, punching, side trimming and side trimming include: the upper die body, the lower die body and the corresponding various wedge mechanisms. The wedge structure is generally designed with the wedge slider assembly on the upper die, and the lower die is designed with the drive block of the wedge wedge assembly. During operation, the lower die drive block drives the upper die slider assembly to work to complete the corresponding work.

For the outer cover of the side wall, the conventional design will lead to insufficient space for the conventional design of the mold structure due to the product shape. The product structure can only be designed according to the conventional five-process side wall, and the increase of the mold process will increase the cost, which is increasingly competitive. It is not advisable for mold making.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a combined die for stamping and forming of an outer cover and a forming process thereof, which can complete trimming and punching in one process, reduce the number of die processes, and reduce the Mold making cost.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

A combined die for stamping and forming an outer cover, comprising an upper die body and a lower die base, the lower part of the upper die body is provided with a pressing material core and a trimming cutter block, and the lower die base is provided with a punch , and also includes a punching assembly, the punching assembly includes a wedge backing plate, a punch guide plate, a driving guide sleeve, a punch connecting column and a punching punch set at the lower end of the punch connecting column. The driving guide sleeve It is inclined on the pressing material core, the punch post is movably set in the drive guide sleeve, the punch guide plate is correspondingly arranged on the upper end of the punch post, the upper die body is provided with a wedge, a wedge pad The upper surface of the plate is set corresponding to the wedge, and the lower surface of the wedge plate is set corresponding to the punch guide plate.

The pressing material core is arranged in the cavity of the upper die body through a nitrogen gas spring.

The pressing material core is provided with an installation hole, the driving guide sleeve is arranged in the installation hole, and the upper end of the pressing material core corresponding to the installation hole is provided with a driving guide sleeve pressing plate for limiting the position of the driving guide sleeve.

The lower end of the punch post is provided with a punch fixing plate, and the punching punch is detachably mounted on the punch fixing plate.

The lower die base is provided with a punching concave die sleeve corresponding to the punching punch.

A return polyurethane is arranged between the punch guide plate and the drive guide sleeve pressing plate.

The lower end of the pressing material core corresponding to the installation hole is provided with a through hole for the punching punch to pass through, and the lower end of the through hole corresponding to the lower end of the punch connecting column is provided with unloading polyurethane.

The driving guide sleeve pressing plate is provided with a urethane guide pin for return urethane guide.

A process for forming a plate by a combined die for stamping and forming an outer cover, comprising the following steps:

Mold clamping work:

When the mold is working, the upper mold body goes down under the action of the press, and the pressing material core is in a non-working state under the action of the nitrogen spring, and provides a pressure source for it. The material core is stressed, and the nitrogen gas spring provides pressure at this time;

When the press moves further down, the installation angle of the punching assembly on the upper die body and the punch guide plate and the guide drive of the blanking core, the punching punch changes the punching direction and moves obliquely downward. At this time, the return polyurethane is on the punch guide plate. It works under force under the action of the driving guide sleeve pressing plate. When the press continues to work, the punching operation of changing the punching direction is completed, and the plate is trimmed by the trimming knife block. The scrap falls into the scrap slot along the scrap slide, and the mold clamping operation is completed;

Mould opening work:

After the stamping and clamping of the die is completed, the press works and returns with the upper die body. At this time, the pressing core is still pressing the sheet under the action of the nitrogen spring, and the punching punch and its trimming block begin to separate from the sheet. , When the pressing material core is in the non-working state, the punching assembly returns under the action of the return polyurethane, the punch connecting column is limited by the driving guide sleeve pressure, and the punching assembly is in the non-working state. The die forms a complete punching process.

Compared with the prior art, the present invention has the following advantages:

The combined die for stamping and forming of the outer cover and the forming process thereof are reasonably designed, trimming and punching can be completed in one process, the die process is reduced, and the die manufacturing cost is reduced; Trimming and shaping, especially with the trimming and punching space is small, the punching is angled, and the lower model surface is all the structure of the part profile that cannot provide driving force for the side punching through the lower die; the invention can be very good. The distance between the inner and outer trimming and punching is short, and the punching must be completed by side punching. The product function can be completed without increasing the process, saving costs and reducing the manufacturing cycle of the main engine factory to increase the press.

Description of drawings

Below is a brief description of the content expressed in each of the drawings in this specification and the symbols in the drawings:

FIG. 1 is a schematic cross-sectional view of the combined mold of the present invention.

Figure 2 is a partial schematic diagram of the combined mold of the present invention.

FIG. 3 is a schematic diagram of the punching assembly of the present invention.

In the picture:

1. Side trimming knife block; 2. Press material core; 3. Upper die body; 4. Wedge pad; 5. Punch guide plate; 6. Punch assembly guide plate; 7. Polyurethane guide pin; 8 .Return polyurethane; 9. Driving guide sleeve pressing plate; 10. Driving guide sleeve; 11. Punch connecting column; 12. Punch fixing plate backing plate; 13. Punch fixing plate; 16. Punching concave die sleeve; 17. Nitrogen gas spring; 18. Punch die; 19. Trimming knife block; 20. Lower die holder.

Detailed ways

The specific embodiments of the present invention will be described in further detail below through the description of the embodiments with reference to the accompanying drawings.

As shown in Figures 1 to 3, the combined die for stamping and forming of outer cover includes an upper die body 3, a lower die base 30 and a punching assembly, and the lower part of the upper die body is provided with a pressing core and a trimming knife The lower die seat is provided with a punch, and the punching assembly includes a wedge backing plate, a punch guide plate, a driving guide sleeve, a punch connecting column and a punching punch set at the lower end of the punch connecting column, and the driving guide sleeve It is inclined on the pressing material core, the punch post is movably set in the drive guide sleeve, the punch guide plate is correspondingly arranged on the upper end of the punch post, the upper die body is provided with a wedge, and the upper surface of the wedge pad 4 Corresponding to the setting of the wedge, the lower surface of the wedge plate 4 is arranged corresponding to the guide plate of the punch.

The pressing material core is arranged in the cavity of the upper die body through the nitrogen gas spring. There is an installation hole in the pressing core, the driving guide sleeve is arranged in the installation hole, the upper end of the pressing core corresponding to the installation hole is provided with a driving guide sleeve pressing plate for limiting the driving guide sleeve, and the structure is compact and the space is small.

The lower end of the punch post is provided with a punch fixing plate 13, the punching punch is detachably mounted on the punch fixing plate 13, and a punch fixing plate backing plate 12 is arranged corresponding to the punch fixing plate. The lower die base is provided with a punching die sleeve corresponding to the punching punch. A return polyurethane 8 is provided between the punch guide plate and the drive guide sleeve pressing plate. The driving guide sleeve pressing plate is provided with a polyurethane guiding pin 7 used for the returning polyurethane guiding.

The lower end of the pressing material core corresponding to the mounting hole is provided with a through hole for the punching punch to pass through, and the lower end of the corresponding punch connecting column in the through hole is provided with discharging polyurethane.

The forming process of the combined die for the stamping and forming of the outer cover to the plate, includes the following steps:

Mold clamping work:

When the mold is working, the upper mold body goes down under the action of the press, and the pressing material core is in a non-working state under the action of the nitrogen spring, and provides a pressure source for it. The material core is stressed, and the nitrogen gas spring provides pressure at this time;

When the press moves further down, the installation angle of the punching assembly on the upper die body and the punch guide plate and the guide drive of the blanking core, the punching punch changes the punching direction and moves obliquely downward. At this time, the return polyurethane is on the punch guide plate. It works under force under the action of the driving guide sleeve pressing plate. When the press continues to work, the punching operation of changing the punching direction is completed, and the plate is trimmed by the trimming knife block. The scrap falls into the scrap slot along the scrap slide, and the mold clamping operation is completed;

Mould opening work:

After the stamping and clamping of the die is completed, the press works and returns with the upper die body. At this time, the pressing core is still pressing the sheet under the action of the nitrogen spring, and the punching punch and its trimming block begin to separate from the sheet. , When the pressing material core is in the non-working state, the punching assembly returns under the action of the return polyurethane, the punch connecting column is limited by the driving guide sleeve pressure, and the punching assembly is in the non-working state. The die forms a complete punching process.

Trimming and punching can be completed in one process, reducing the mold process and reducing the cost of mold production; it can effectively complete the trimming and shaping around and in the middle of the part in a small space, especially when the trimming and punching space is small, and the punching is easy. The structure is angled, and the lower model surface is all the part profile, which cannot provide driving force for the side punching through the lower die; the present invention can well complete the inner and outer trimming and the punching distance is short, and the punching can only be completed by side punching , Complete the product function without increasing the process, save the cost and reduce the manufacturing cycle of the main engine factory to increase the press.

Preferred examples are shown in Figures 1 to 3:

The combination of the cold punching die for the outer cover that is driven by the core to change the punching direction, includes the lower die base, the punch 18, the upper die body 3, the pressing material core 2, and the pressing material core is provided with a punching component for changing the punching direction, which is connected with the upper die body. Under the action of each guide, the driving component changes the vertical punching direction to the normal direction of the plate punching, and realizes changing the punching angle. The punching work is completed through the concave die sleeve set in the punching die of the punching punch. , Trimming and punching can be completed in one process of punching and trimming. Without a conventional drive seat position, it cannot be completed without adding a mold. The inventive structure can complete punching and trimming without adding a mold process.

The invention changes the punching direction. The punching assembly and the pressure core are connected through the pressure plate, and the driving guide sleeve cooperates, and the pressure plate and the punch joint cooperate to control the movement in the circumferential direction. The downward movement, along the driving guide sleeve, realizes the vertical punching of the die to the angle punching, the plate punching and pressing material is unloaded by the pressing material polyurethane, the punching component punching is completed, and the punching is moved upward with the upper die and the pressing material core, and the return stroke The polyurethane driving punch post drives the punching assembly to return.

The mounting surface of the punch guide plate of the upper die body is perpendicular to the normal direction of the punched hole. During the working process of the upper die body and the pressing core, the punching components are displaced on the punch guide plate, and the punching process is completed with the further work of the press. Sliding fit is realized between the guide plate of the head assembly and the guide plate of the punch.

The punching assembly is fixed by the driving guide sleeve pressing plate in the pressing material core, and one side of the driving guide sleeve pressing plate is slidingly matched with the punch connecting column plane to control the radial rotation of the punch, and the punch connecting column cooperates with the driving guide sleeve H7/h6 , the driving guide sleeve and the pressure core H7/m6 are matched, the punching punch is matched with the punching fixing plate H7/m6, and is fixed on the punch post, the discharging polyurethane is connected with the punching punch, and the discharging is realized after releasing. , The concave die and the punch are solid H7/m6 with the punching punch to complete the sheet metal punching.

The reverse wedge mechanism includes an inclined lower die wedge slider, a horizontally arranged lower die wedge drive slider and a vertically arranged lower pressing slider, and the lower die wedge insert is arranged on the lower die wedge slider. At the upper end, the lower pressing slide is driven by the upper die body to move downward, the lower die wedge drive slide is located between the lower pressing slide and the lower die wedge slide, and the lower die wedge driving slide is slid by the lower die The block drive moves in the horizontal direction, and drives the lower die wedge slider to move in the oblique direction toward the pressing core wedge insert.

In the non-working state of the mold, the pressure core is in a free state under the action of the nitrogen gas spring, and the punching component is in a non-working state in the return stroke under the action of the return polyurethane. The guide plate of the punch assembly of the mechanism is fastened to the punch post with screws, the driving guide sleeve pressing plate is fastened to the pressing core with screws, and is positioned on the pressing core with a fixing pin, while taking into account the return-travel polyurethane guiding function , One side of the driving guide sleeve pressing plate is slidably fitted with the punch post, the return polyurethane is pressed and rebounded between the punch assembly guide plate and the driving guide sleeve pressing plate, and the punching punch is too much fit on the punch fixing plate. , and the punch fixing plate are fixed on the punch post with screws and positioned with a fixing pin.

In the present invention, utilizing the mould forming process is specifically:

Mold clamping work:

When the mold is working, the upper mold body 3 goes down under the action of the press slider, the pressing material core 2 is in a non-working state under the action of the nitrogen gas spring 17, and provides a pressure source for it, and the pressing material core 2 is connected with the upper The die body 3 is connected and is in a non-working state. The pressing material core 2 and the upper die are guided by a guide plate. As the press continues to descend, the pressing material core and the punch 18 are in contact, and the pressing material core 2 is stressed. At this time, the nitrogen gas spring 17 Provide pressure, when the press moves further down, the side punching assembly is fixed on the pressing material core 2 by the driving guide sleeve pressing plate 9, the driving guide sleeve 10 and the pressing material core 2 are transitionally matched, and are limited by the driving guide sleeve pressing plate 9 (Axial limit stroke and radial limit rotation), the guide plate 6 of the punch assembly begins to contact the punch guide plate 5, and the upper die is used as the installation angle of the body 3 and the punch guide plate 5 and the guide and driving effect of the blank 2 , change the stamping direction (20° angle with the stamping direction of the press) and move downward, the guide plate 6 of the punch assembly moves to the center of the die during the downward process of the press, and at the same time changes the stamping direction and moves downward. At this time, the return polyurethane 8 is in The punch guide plate 6 and the driving guide sleeve pressing plate 9 work under force. The punching punch 14 is matched with the punch fixing plate 13 in transition H7/m6, and is fixed on the punch post 11 with screws and fixing pins. When the machine continues to work, the punching die sleeve 16 fixed on the punch 18 is punched, and driven by the pressing material core 2, it moves axially along the driving guide sleeve 10 to complete the punching operation of changing the punching direction. At this time, the pressing material core 2 The unloading polyurethane 15 is in a pressurized working state, down to the bottom dead center of the mold, the plate is completely separated from the plate under the action of the punching punch 14 and the punching die sleeve 16, and the waste material falls into the waste material along the waste slide plate in the later stage. In the groove, so far the clamping operation is completed.

Mould opening work:

After the stamping and clamping of the die is completed, under the action of the press, the slider on the press drives the upper die body 4 to return, followed by the return of the upper die body 3. At this time, the pressing core 2 is still pressing the sheet under the action of the nitrogen spring 17. , the punching punch 14 and its side trimming cutter block 1 and the trimming cutter block 19 begin to separate from the plate, wherein the pressure of the sheet at the punching punch 14 is completed by discharging the polyurethane 15. When the upper die returns with the press When the working stroke of the pressure material core 2 is reached, the pressure material core 2 will go up with the press under the connection of the working side pin and the upper die body 3. At this time, the pressure material core 2 will return to the non-working state under the action of the nitrogen gas spring 17, and the material will be unloaded. The polyurethane 15 releases the pressure from the sheet as the press rises, and is in a non-working state. When the blanking core 2 is in a non-working state, the punch assembly guide plate 6 in the punching assembly and the punch on the upper die body guide The plate 5 is separated, the punch assembly is returned under the action of the return polyurethane 8, the punch post 11 is limited by the driving guide sleeve pressing plate 9 (axial limit stroke and radial limit rotation), and the return polyurethane 8 is guided by the polyurethane. The positive pin 7 guides, and the polyurethane guide pin 7 is also the positioning pin for fixing the driving guide sleeve pressing plate 9 and the pressing material core 2. The punching assembly is in a non-working state. At this point, the mold opening is completed, and a complete punching process is formed with the mold clamping. .

The above description is only for the description of the preferred embodiments of the present invention, and the above technical features can be combined arbitrarily to form a plurality of embodiments of the present invention.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above manner, as long as various insubstantial improvements made by the concept and technical solutions of the present invention are adopted, or the If the concept and technical solutions of the present invention are directly applied to other occasions, they all fall within the protection scope of the present invention.

Claims (9)

1. A combined die for stamping and forming of an outer cover, comprising an upper die body and a lower die seat, the lower part of the upper die body is provided with a pressing material core and a trimming knife block, and the lower die seat is provided with The punch is characterized in that it further includes a punching assembly, the punching assembly includes a wedge backing plate, a punch guide plate, a driving guide sleeve, a punch connecting column and a punching punch arranged at the lower end of the punch connecting column , the driving guide sleeve is obliquely arranged on the pressing material core, the punch connecting column is movably arranged in the driving guide sleeve, the punch guiding plate is correspondingly arranged on the upper end of the punch connecting column, and the upper die body is provided with The oblique wedge, the upper surface of the oblique wedge pad is set corresponding to the oblique wedge, and the lower surface of the oblique wedge pad is set corresponding to the punch guide plate. 2 . The combined die for stamping and forming of an outer cover according to claim 1 , wherein the pressing material core is arranged in the cavity of the upper die body through a nitrogen gas spring. 3 . 3. The combined die for stamping and forming of an outer cover according to claim 1, wherein the pressing material core is provided with a mounting hole, the driving guide sleeve is arranged in the mounting hole, and the pressing material core corresponds to the mounting hole The upper end of the drive guide sleeve is provided with a driving guide sleeve pressing plate for limiting the position of the driving guide sleeve. 4. The combined die for stamping and forming of an outer cover according to claim 1, wherein the lower end of the punch post is provided with a punch fixing plate, and the punching punch is detachably mounted on the punch fixed plate. 5. The combined die for stamping and forming of an outer cover according to claim 1, wherein the lower die base is provided with a punching concave die sleeve corresponding to the punching punch. 6 . The combined die for stamping and forming an outer cover according to claim 3 , wherein a return polyurethane is provided between the punch guide plate and the driving guide sleeve pressing plate. 7 . 7. The combined die for stamping and forming of an outer cover according to claim 3, wherein the lower end of the pressing material core corresponding to the mounting hole is provided with a through hole for the punching punch to pass through, and the through hole The lower end of the inner corresponding punch post is provided with unloading polyurethane. 8 . The combined die for stamping and forming an outer cover according to claim 6 , wherein the driving guide sleeve pressing plate is provided with a urethane guide pin for returning urethane guide. 9 . 9. A molding process for a plate by utilizing the combined die for stamping and molding of an outer cover as claimed in any one of claims 1 to 8, wherein the molding process comprises the following steps: Mold clamping work: When the mold is working, the upper mold body goes down under the action of the press, and the pressing material core is in a non-working state under the action of the nitrogen spring, and provides a pressure source for it. The material core is stressed, and the nitrogen gas spring provides pressure at this time; When the press moves further down, the installation angle of the punching assembly on the upper die body and the punch guide plate and the guide drive of the blanking core, the punching punch changes the punching direction and moves obliquely downward. At this time, the return polyurethane is on the punch guide plate. It works under force under the action of the driving guide sleeve pressing plate. When the press continues to work, the punching operation of changing the punching direction is completed, and the plate is trimmed by the trimming knife block. The scrap falls into the scrap slot along the scrap slide, and the mold clamping operation is completed; Mould opening work: After the stamping and clamping of the die is completed, the press works and returns with the upper die body. At this time, the pressing core is still pressing the sheet under the action of the nitrogen spring, and the punching punch and its trimming block begin to separate from the sheet. , When the pressing material core is in the non-working state, the punching assembly returns under the action of the return polyurethane, the punch connecting column is limited by the driving guide sleeve pressure, and the punching assembly is in the non-working state. The die forms a complete punching process.