CN204135180U - Garter spring bending die - Google Patents

Abstract

The utility model discloses a hoop ring bending die, which comprises an upper die and a lower die matched with each other; the upper die includes an upper die, pressing blocks respectively installed on both sides of the upper die, and a a cylindrical mandrel in the middle, and the mandrel protrudes from the press block; the lower mold includes a lower template, which are respectively fixed to opposite wedges on both sides of the lower template, and are arranged on each of the wedge slopes The upper module, and the elastic support mechanism connected with the module, the elastic support mechanism is connected with the lower template; there is a gap between the two opposite modules, forming a working belt and an arc-shaped cavity connected to each other, and the said The cavity matches the shape of the mandrel. The hoop bending die can extrude and bend the bar-shaped blank into a hoop at one time, the mold structure is simple and convenient to manufacture, the processing technology is reduced, and the working efficiency is improved.

Description

hoop bending die

technical field

The utility model relates to the field of stamping dies, in particular to a hoop bending die.

Background technique

Hoop parts are very common in industrial structural parts and hardware structural parts, but their traditional processing methods require 3 to 4 processes to form. During the processing, on the one hand, 3 to 4 sets of forming dies and 3 to 4 punching machines are used, and each set of molds and punching machines needs to be equipped with an operator. The production cost is relatively high, and it cannot meet the needs of mass production. On the other hand, the more forming processes, the lower the dimensional accuracy of the product, and even more waste products. The main and most critical technical problems in traditional technology: many processes, high cost, low efficiency; low dimensional accuracy, prone to waste products. Moreover, the management difficulty of the production site is increased, and the products are prone to collision during the process of process transfer, which will damage the quality of the product.

Contents of the invention

Based on this, in order to solve the problem of too many hoop processing steps, the utility model provides a hoop bending die.

Its technical scheme is as follows:

A hoop bending die, comprising an upper die and a lower die that cooperate with each other; the upper die includes an upper template, pressure blocks respectively installed on both sides of the upper template, and a cylindrical core connected to the middle of the upper template shaft, and the mandrel protrudes from the pressing block; the lower mold includes a lower template, respectively fixed on opposite oblique wedges on both sides of the lower template, a module arranged on each inclined surface of the oblique wedge, and The elastic support mechanism connected with the modules on both sides, the elastic support mechanism is connected with the lower formwork; there is a gap between the two opposite modules, forming a working belt and an arc-shaped cavity connected to each other, and the cavity and the The mandrel profile matches.

The blank is placed on the aligned two modules, the middle of the blank is aligned with the cavity and the mandrel is aligned with the middle of the blank. In the non-working state, the elastic support mechanism can hold the module and the blank to keep still; when working, the upper die presses down towards the module under the action of external force, and the pressing block on the upper die will press the blank at the module during the pressing process. The piece is bent into a U shape; the pressing block of the upper mold continues to press down, and the pressing block will start to press the module to slide down along the slope of the wedge, and will press down the elastic support mechanism, the gap between the two modules will be reduced, and the module will continue to bend and squeeze For a U-shaped blank, the mandrel continues to go down into the cavity, and the cavity will squeeze the semicircular end of the U-shaped blank for further forming; the upper mold continues to press down until the two modules go down to meet the mandrel The parts are approximately coincident. Under the extrusion and bending action of the pressing block and the module, the opening of the U-shaped blank is also extruded into a circular arc shape, and the blank is completely bent and wrapped on the surface of the mandrel, so that the blank is processed into a complete hoops.

A technical solution is further described below:

Preferably, the upper mold further includes a mandrel connecting piece, one end of the mandrel connecting piece is connected to the end of the mandrel and the other end is connected to the upper template. Connect the mandrel and the upper template from the end with the connecting piece, so that when the external force acts on the upper template, the mandrel can be pushed down, and when the mandrel enters the cavity and the blank is squeezed and bent, the core The shaft connecting piece can always be located outside the lower die, and will not interfere with the lower die structure, ensuring smooth hoop forming.

Preferably, the upper mold further includes a convex plate, and the convex plate is connected between the mandrel and the upper mold. A raised plate is provided above the mandrel to facilitate the final formation of the bend of the hoop. The protruding plate can keep the end of the blank always separated during extrusion bending, thereby forming a protruding bent portion at the end of the hoop.

Preferably, a mold handle is also provided on the upper template. By setting the mold shank, it is convenient to apply pressure to the upper template, so that the mandrel and the briquetting block are pressed down.

Preferably, the elastic support structure includes a pallet supporting two modules, at least one push rod connected to the pallet, a lower push plate connected to the push rod, and a down the spring. The elastic support structure forms a spring top device, which can provide support for the module in the non-working state and at the beginning of the work, so as to facilitate the extrusion and bending of the blank into a U shape; after the work is over, when the pressure exerted by the upper die on the lower die is removed , the pop-up device can reset the module, that is, to spread the two modules, so that the mandrel and the formed hoop can be removed conveniently.

Preferably, the lower die also includes a sealing plate arranged on the outside of the wedge and the module, the wedge is fixedly connected to the sealing plate; a chute is provided on the sealing plate, and the chute is connected to the The direction of the inclined plane of the oblique wedge is consistent, and the module is movably connected with the sealing plate through the slide groove. The sealing plate can be used to limit and fix the wedge and the module to prevent the module from sliding out from the side when it is under pressure, and by setting a slide groove on the sealing plate, the module can still slide freely on the slope of the wedge.

Preferably, a groove is provided on the inclined surface of each wedge, and the module is movably installed in the groove. In addition, the module can also slide in the groove by providing a groove on the inclined surface of the wedge, and simultaneously play the role of the slide rail and the limiting groove.

Preferably, the lower mold further includes a positioning plate whose one end is fixed on the wedge and the other end covers the module. By arranging the positioning plate on the top of the lower mold, the module can be positioned from above, preventing the module from sliding out due to the elastic force of the elastic support mechanism. In addition, it is also possible to limit the blanks placed on the module from both ends.

The utility model has the following beneficial effects:

1. Reduce the traditional multiple processes into one process, reduce the process flow and improve production efficiency;

2. Reduce multiple sets of molds to one set, making the mold production simple and easy to operate;

3. Reduce the number of molds and operators, thereby reducing the cost;

4. It is suitable for all kinds of round parts and has a wide range of applications.

Description of drawings

Fig. 1 is a partial cross-sectional schematic diagram of the hoop bending die described in the embodiment of the present invention;

Fig. 2 is a schematic left view of Fig. 1;

Fig. 3 is a schematic diagram when the mandrel of the hoop bending die described in the embodiment of the present invention is in contact with the blank;

Fig. 4 is a schematic diagram when the mandrel of the hoop bending die described in the embodiment of the present invention presses the blank into a U shape;

Fig. 5 is a schematic diagram of two modules of the hoop bending die described in the embodiment of the present invention when extruding and bending the blank;

Fig. 6 is a schematic diagram of the two modules of the hoop bending die described in the embodiment of the present invention when they are closed to bend and form the hoop;

Fig. 7 is a schematic view of the forming hoop according to the embodiment of the present invention.

Explanation of reference signs: 100-upper die, 110-die handle, 120-upper template, 130-briquetting block, 140-mandrel connector, 150-mandrel, 152-mandrel locking screw, 160-convex plate, 170-convex plate fixing plate, 200-lower mold, 210-lower template, 212-flange, 220-wedge, 230-module, 232-cavity, 234-working belt, 240-sealing plate, 242-chute , 250-pallet, 252-rod, 260-down push plate, 270-spring, 280-positioning plate, 300- hoop, 310- hoop bending part, 400- blank.

Detailed ways

Embodiments of the present utility model are described in detail below:

As shown in FIGS. 1 to 2 , a hoop bending mold includes an upper mold 100 and a lower mold 200 that cooperate with each other. The upper mold 100 includes an upper mold 120 , pressing blocks 130 mounted on both sides of the upper mold 120 , and a cylindrical mandrel 150 connected to the middle of the upper mold 120 , and the mandrel 150 protrudes from the pressing blocks 130 . A mold handle 110 is also provided on the upper template 120 . By setting the mold handle 110, it is convenient to apply pressure to the upper mold plate 120, so that the mandrel 150 and the pressure block 130 are pressed down.

The lower mold 200 includes a lower template 210 respectively fixed to opposite wedges 220 on two sides of the lower template 210 . Moreover, the two ends of the lower template 210 are also provided with flanges 212 for clamping the wedges 220 from both sides to limit the position of the wedges 220 , and fixing the wedges 220 from below the lower template 210 with screws. In addition, each oblique wedge 220 has an inclined surface, and the oblique surfaces of the two oblique wedges 220 face each other to form a trapezoidal opening with a larger top and a smaller bottom. The inclination angle of the slope here can be adjusted according to the actual situation, and an inclination angle of 50 degrees is preferred in this embodiment. The lower mold 200 also includes a module 230 arranged on the inclined surface of each wedge 220, and each module 230 matched with the inclined wedge 220 is also provided with a module inclined surface matched with the inclined surface of the inclined wedge, so that the module 230 can move along the inclined surface of the inclined wedge. The slope of 220 slides freely. The lower mold 200 is also provided with an elastic support mechanism connected to the modules 230 on both sides. Specifically, the elastic support mechanism is supported under the two modules 230 , and the elastic support mechanism is connected to the lower mold plate 210 . There is a gap between two opposite modules 230 , forming a working belt 234 and an arc-shaped cavity 232 that communicate with each other, and the cavity 232 matches the shape of the mandrel 150 . In addition, grooves can also be provided on the working belt and the cavity wall, and the blank can just be embedded in the groove during work, and the blank can be positioned to avoid deformation of the blank during extrusion and bending.

The upper mold 100 of the hoop bending mold further includes a mandrel connecting piece 140 , one end of the mandrel connecting piece 140 is connected to the end of the mandrel and the other end is connected to the upper template 120 . The mandrel 150 is connected with the upper die plate 120 from the end by a connecting piece, so that when an external force acts on the upper die plate 120, the mandrel 150 can be pushed downward, and the blank 400 is squeezed when the mandrel 150 enters the cavity 232. During the bending process, the mandrel connector 140 can always be located outside the lower die 200 without interfering with the lower die structure, which ensures smooth forming of the hoop 300 . Specifically, the mandrel 150 is mounted and fixed on one end of the mandrel connector 140 through the mandrel locking screw 152 and the lock nut, and the other end of the mandrel connector 140 is connected to the upper template 120 through a screw, which is simple and convenient. The mandrel connection 140 here is a support plate.

In addition, the upper mold 100 further includes a protruding plate 160 connected between the mandrel 150 and the upper mold 120 . Providing the raised plate 160 above the mandrel 150 facilitates the final formation of the hoop bend 310 . The protruding plate 160 can keep the end of the blank 400 in a separated state during the extrusion bending process of the blank 400 , thereby forming a protruding hoop bend 310 at the end of the hoop 300 . Moreover, the convex plate 160 is connected below the upper template 120 and is located directly above the mandrel 150, and the convex plate fixing plates 170 are respectively arranged on both sides of the convex plate 160, and the convex plate fixing plates 170 are fixed on the upper mold plate by screw connection. On the formwork 120 , the protruding plates 160 are fixed from both sides, so as to facilitate the forming of the hoop bending portion 310 at the protruding end of the hoop 300 .

Moreover, the elastic support structure provided on the lower die 200 of the hoop bending die includes a supporting plate 240 supporting two modules 230, at least one ejector rod 252 connected with the supporting plate 250, and a lower ejector rod 252 connected with the ejector rod 252. Push pedal 260, and the spring 270 installed under the lower push pedal 260. The module 230 is supported by the supporting plate 250, and under the action of the spring 270, an upward pre-tightening elastic force is applied to the module 230, so that the module 230 will not slide down easily. In addition, by setting the lower push plate 260 and a plurality of push rods 252, Make the supporting plate 250 more uniform in force, so that the modules 230 on both sides can maintain good stability, and there will be no uneven force on the modules 230 on both sides, which will cause the module 230 on one side to slide and the module 230 on the other side to get stuck (or The situation that the moving speed is different) occurs, which affects the forming of the hoop 300. The elastic support structure forms a spring top device, which can provide support for the module 230 in the non-working state and at the beginning of the work, which is beneficial to extruding and bending the blank 400 into a U shape; When the pressure is removed, the pop-up device can reset the module 230 under the action of elastic force, that is, the two modules 230 will be stretched apart, so that the mandrel 150 and the formed hoop 300 can be removed conveniently. Moreover, the spring 270 of the elastic support structure can be connected and arranged on the upper surface of the lower template 210, and the lower push plate 260 and the push rod 252 are all arranged between the lower template 210 and the supporting plate 250; It can be arranged under the lower template 210, and the spring 270 is connected and fixed with the external structure, and the push rod 252 passes through the lower template 210 and can move freely.

In addition, the lower mold 200 also includes a sealing plate 240 arranged on the outside of the wedge 220 and the module 230, the wedge 220 is fixedly connected with the sealing plate 240, specifically, the sealing plate 240 is fixed on the wedge 220 by a plurality of sealing plate screws . Moreover, the sealing plate 240 is also provided with a chute 242, the chute 242 is consistent with the direction of the slope of the wedge 220, and the module 230 is movably connected with the sealing plate 240 through the chute 242, specifically by setting the guide on the module 230. The sliding screw (not shown in the figure) is connected in the sliding groove 242 of the sealing plate 240 to realize that, when the module 230 moves, the guiding sliding screw slides in the sliding groove 242 . The sealing plate 240 can be used to limit and fix the wedge 220 and the module 230 to prevent the module 230 from sliding out from the side when it is under pressure, and by setting the chute 242 on the sealing plate 240, the module 230 can still be placed on the wedge. 220 slide freely on the slope. Both sides of the lower mold 200 are provided with sealing plates 240 to limit the wedge 220 and the module 230 from both sides. And, each side can be provided with two separate sealing plates 240, so that the cavity 232 formed between the two modules 230 is kept in communication with the outside world, so that the mandrel 150 can pass in and out of the cavity 232 without contact with the module 230 or the sealing plate. Plate 240 interferes.

In addition, a groove can also be provided on the slope of each wedge 220, and the module 230 can be movably installed in the groove. That is, the module 230 can slide in the groove by providing a groove on the inclined surface of the wedge, and the groove simultaneously functions as a slide rail and a limiting groove. In this way, there is no need to set the slide groove 242 on the sealing plate 240 to connect the module 230, and only need to limit the module 230 through the groove. In addition, the above two situations can also be combined, that is, the groove of the wedge 220 and the sliding groove 242 on the sealing plate 240 are used to limit the position of the module 230 at the same time.

In addition, the lower mold 200 also includes a positioning plate 280 with one end fixed on the wedge 220 and the other end covering the module 230 . By setting the positioning plate 280 on the upper surface of the lower mold 200, the module 230 can be positioned from the upper surface, preventing the module 230 from sliding out due to the elastic force of the elastic supporting mechanism. Both ends of the lower mold 200 are provided with positioning plates 280 , which are convenient for limiting the position of the modules 230 on both sides, and can also limit the position of the blank 400 placed on the module 230 . The positioning plate 280 can be installed on the upper surface of the wedge 220 through fixing screws.

As shown in Figures 3 to 7, the working process of the hoop bending die is as follows:

Before stamping begins, the module 230 and the supporting plate 250 are ejected by the ejector rod 252, the lower push plate 260, and the spring 270 to the horizontal position flush with the wedge 220, and the blank 400 is placed on the aligned two modules 230. The middle of 400 is aligned with the cavity, and the mandrel 150 is aligned with the middle of blank 400 . The positioning plate 280 not only positions the blank but also limits the position of the wedge 220 . At this time, the two modules 230 are separated from each other on the left and right sides. In the non-working state, the elastic support mechanism can support the module 230 and the blank 400 to keep still;

When stamping begins, the upper die 100 presses down in the direction of the module 230 of the lower die under the action of an external force, and the mandrel 150 will bend the blank 400 into a U-shape at the working belt 234 formed on the lower die module during the pressing down process. The punching U-shaped bending force is borne by the elastic support mechanism, and the spring force of the elastic support mechanism balances the bending force of the pre-bent U-shape;

When stamping is further carried out, the upper die 100 continues to press down, and the pressing block 130 under the upper template 120 contacts the module 230, and the upper die pressing block 130 will start to press the module 230 to slide down along the slope of the wedge 220, and will press down the elastic support mechanism. The gap between the two modules 230 decreases, and the working belt 234 will continue to bend and extrude the U-shaped blank 400. At this time, the mandrel 150 also continues to descend into the cavity 232 formed between the two modules, and the cavity 232 will The semicircular end of the U-shaped blank 400 is further extruded; the upper die 100 continues to press down until the two modules 230 go down to the working belt 234 and partially coincide (that is, the two modules are close together). Under the extrusion and bending action of the cavity 232, the opening of the U-shaped blank 400 is also extruded into a circular arc shape, and the blank 400 is completely bent and wrapped on the surface of the mandrel 150, thereby processing the blank 400 into a complete hoop ring 300; at the same time, the convex plate of the upper die acts on the end of the blank to form the hoop bend 310.

After the hoop 300 is processed, the pressure applied on the upper mold 100 is removed, and the module 230 slides back under the elastic force of the elastic support mechanism. One side is separated left and right along the horizontal direction, and when the two modules 230 are horizontally separated to a certain position, the processed hoop 300 part can be taken off from the mandrel 150 .

The hoop bending die adopts the principle of pop-up device and inclined wedge forming, and the forming of parts is completed by using a set of molds. The pop-up device (that is, the elastic support mechanism) is composed of the lower push plate 260, the spring 270, the ejector rod 252 and the supporting plate 250; the wedge forming structure is composed of the module 230, the wedge 220, the sealing plate 240 and the guide screw.

The above-mentioned embodiments only express the specific implementation manners of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model.

Claims (8)

1. a garter spring bending die, is characterized in that, comprises the upper die and lower die cooperatively interacted;

Described patrix comprises cope match-plate pattern, is installed on the briquetting of described cope match-plate pattern both sides respectively, and is connected to the cylindric mandrel in the middle part of described cope match-plate pattern, and described mandrel protrudes from described briquetting;

Described counterdie comprises lower bolster, is individually fixed in the wedge that described lower bolster both sides are relative, is arranged at the module on each described wedge inclined-plane, and with the elastic supporting mechanism of both sides model calling, described elastic supporting mechanism is connected with lower bolster;

Between two relative described modules, there is space, form the work strip and arc die cavity that are interconnected, and described die cavity and mandrel form fit.

2. garter spring bending die according to claim 1, is characterized in that, described patrix also comprises mandrel connector, and described connecting mandrel end, mandrel connector one end and the other end connect cope match-plate pattern.

3. garter spring bending die according to claim 1, is characterized in that, described patrix also comprises flange, and described flange is connected between described mandrel and cope match-plate pattern.

4. garter spring bending die according to claim 1, is characterized in that, described cope match-plate pattern is also provided with die shank.

5. garter spring bending die according to claim 1, it is characterized in that, described elastic support structure comprises the supporting plate of support two modules, at least one push rod be connected with described supporting plate, the lower push pedal be connected with described push rod, and be installed on the spring under described lower push pedal.

6. the garter spring bending die according to claim 1-5 any one, it is characterized in that, described counterdie also comprises the shrouding be arranged on outside described wedge and module, described wedge is fixedly connected with described shrouding;

Described shrouding is provided with chute, and the bevel direction of described chute and wedge is consistent, and described module is flexibly connected with described shrouding by chute.

7. the garter spring bending die according to claim 1-5 any one, is characterized in that, each described wedge inclined-plane arranges groove, and described module activities is installed in this groove.

8. the garter spring bending die according to claim 1-5 any one, is characterized in that, described counterdie also comprises one end and is fixed on described wedge that the other end covers the location-plate in described module.