CN105750423B - A kind of mould - Google Patents

Abstract

The application relates to a mold, including an upper mold and a lower mold. The upper mold includes an upper mold base, a forming punch and a forming limit punch. Both the forming punch and the forming limit punch are fixed on the upper mold base and protrude At the bottom of the upper mold base, the forming punch has a first main plane and a forming surface, and the forming limiting punch has a second main plane and two limiting surfaces, and the forming punch and the forming limiting punch are adjacently arranged and The first main plane is opposite to and parallel to the second main plane; the lower mold includes a lower mold base, a forming binder block, a sliding forming die and an elastic mechanism, the sliding forming die is arranged on the lower die base, and the sliding forming die faces the forming press One side of the material block is a matching surface that matches the limit surface. The elastic mechanism is set at the end of the sliding forming die away from the forming pressing block and is fixedly connected with the base of the lower die. The dimensions match the accommodation gap.

Description

a mold

technical field

The present application relates to a mold, in particular to a mold capable of reducing the appearance defect rate of aluminum sheet metal.

Background technique

For the bending and forming of aluminum sheet metal with gradual thickness, the existing method mainly uses the mold to bend it. Because the thickness of the aluminum sheet metal with gradual thickness is inconsistent, the existing mold cannot completely press the aluminum sheet metal , resulting in a large springback in the bending angle of the aluminum sheet metal. In order to overcome this problem, the existing technology also adjusts the springback of the bending angle through bending shaping, but because the aluminum sheet metal is soft and the shaping process The force of the aluminum sheet metal is inconsistent, and the shaping work can easily cause the deformation of the aluminum sheet metal at the bend and the problem of surface scratches, which increases the appearance defect rate of the aluminum sheet metal, which in turn leads to an increase in production costs. Increase.

Contents of the invention

The present application provides a mold, which effectively solves the problem that the existing molds tend to have a high rate of defective appearance in the process of bending and forming aluminum sheet metals with gradually changing thicknesses.

The application provides a mold, including an upper mold and a lower mold,

The upper mold includes an upper mold base, a forming punch and a forming limiting punch, and both the forming punch and the forming limiting punch are fixed on the upper mold base and protrude from the upper mold base. The bottom of the mold base, the molding punch has a first main plane and a molding surface, the molding surface is located at the bottom and both sides of the molding punch, and is arranged around the edge of the first main plane, the molding The limiting punch has a second main plane and two limiting surfaces, and the two limiting surfaces are respectively located on both sides of the forming limiting punch, and are arranged symmetrically with respect to the second main plane. The forming punch is adjacent to the forming limiting punch and the first main plane is opposite to and parallel to the second main plane;

The lower mold includes a lower mold base, a forming binder block, a sliding forming die and an elastic mechanism, and the sliding forming die is arranged on the lower mold base and forms together with the lower mold base to accommodate the forming pressing block The forming press groove, the top of the forming pressing block matches the bottom of the forming punch, and can reciprocate in the vertical direction in the forming pressing groove, and the sliding forming die faces the One side of the forming binder block is a mating surface matching the limiting surface, and the elastic mechanism is arranged at the end of the sliding forming die away from the forming binder block and is fixedly connected with the lower mold base , there is an accommodating gap matching the size of the molding material between the molding surface and the mating surface.

Preferably, the lower mold base includes a lower template and a lower mold backing plate, the lower template is arranged on the lower mold backing plate, and the side of the lower template facing the sliding forming concave mold is provided with an accommodating The groove of the elastic mechanism, the end of the elastic mechanism away from the forming binder block is fixed in the groove, and there is a gap between the lower template and the sliding forming die for the sliding forming die A sliding gap for sliding between the lower template and the forming binder block.

Preferably, the elastic mechanism is a spring.

Preferably, the upper mold base includes an upper mold backing plate and an upper template, the upper template is arranged at the lower end of the upper mold backing plate, and both the forming punch and the forming limiting punch pass through the The upper template is fixed on the upper mold backing plate, and the position of the upper template close to the forming punch is provided with an escape space to avoid the bending of the molding material when the upper mold and the lower mold are closed.

Preferably, the lower mold further includes a roller core, the roller core is rotatably arranged on the top of the sliding forming die close to the side of the forming binder block, the sliding forming die has a top surface, the The roller cores are respectively tangent to the top surface and the mating surface.

Preferably, the rolling core is a tungsten steel mandrel.

Preferably, an elastic force transmission component is also included, the elastic force transmission component is connected with the forming pressing block, and the elastic force transmitting component provides support force for the forming pressing block to realize that the forming pressing block is The reciprocating movement in the vertical direction in the molding press groove.

Preferably, the elastic force transmission component includes a spring and a support rod, the support rod passes through the backing plate of the lower die, and one end of the support rod is connected to the spring, and the other end is connected to the forming binder block ;

When the upper mold and the lower mold are pressed together, the forming pressing block transmits the pressure to the support rod, and the support rod compresses the spring;

When the upper mold is separated from the lower mold, the compressed spring transmits the restoring force to the support bar to support the reset of the forming binder to the upper plane of the forming binder and the sliding forming die. The top surface is even.

Preferably, several positioning blocks are also included, the positioning blocks are arranged on the forming pressing block and partially protrude from the forming pressing block.

Preferably, the elastic force transmission assembly further includes a limit block, the limit block is arranged at one end of the support rod connected to the spring, and the support rod supports the forming press block to the forming press. When the upper plane of the material block is equal to the top surface of the sliding forming die, the limiting block is attached to the bottom surface of the lower mold backing plate.

The technical solution provided by the application can achieve the following beneficial effects:

The mold provided by this application is provided with a limit forming punch on the base of the upper mold, and a sliding forming die is set on the base of the lower mold. The limit of the sliding forming die provides a gradually changing accommodation gap for the forming punch and the sliding forming die to accommodate the aluminum sheet metal with gradually changing thickness. The action force of the sliding forming die on the aluminum sheet metal is kept consistent, thereby reducing the appearance defect rate of the aluminum sheet metal during the bending process, thereby reducing the production cost.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the application.

Description of drawings

Fig. 1 is a structural schematic diagram 1 of the mold provided in the embodiment of the present application before lamination;

Fig. 2 is a schematic diagram of the local structure when the mold shown in Fig. 1 is pressed together;

FIG. 3 is a schematic diagram of a partial three-dimensional structure of the molds shown in FIG. 1 when they are pressed together.

1. Upper mold; 11. Upper mold base; 111. Upper template; 112. Upper mold backing plate; 12. Forming punch; 121. Forming surface; 122. First main plane; 13. Forming limit punch; 131 , limit surface; 132, the second main plane;

2, lower mold; 21, lower mold base; 211, lower template; 212, lower mold backing plate; 213, groove; 214, sliding gap; 22, forming binder block; 23, sliding forming die; 232, accommodation gap; 233, top surface; 24, elastic mechanism; 25, rolling core;

3. Elastic force transmission component; 31. Spring; 32. Support rod; 33. Limit block;

4. Positioning block; 5. Aluminum sheet metal.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

detailed description

The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. "Front", "rear", "left", "right", "upper" and "lower" in the text are all based on the placement state of the mold in the accompanying drawings.

When the existing mold is bending and forming the aluminum sheet metal 5 with a gradual thickness, since the upper mold 1 and the lower mold 2 are vertically relative to each other, the force of the two on the aluminum sheet metal 5 is relatively concentrated. In the vertical direction, it is impossible to provide enough force in the bending direction to bend and form the aluminum sheet metal 5, so the existing mold has a large springback when bending and forming the aluminum sheet metal 5 and cannot be overcome, resulting in that the bent aluminum sheet metal 5 cannot meet the requirements of the bending angle. In order to overcome the rebound and adjust the bending angle in place, the existing forming process will bend the aluminum sheet metal after bending. 5 to carry out bending and shaping, but because the aluminum sheet metal 5 is relatively soft, and it is aimed at the local shaping of the bend, the shaping process can easily lead to impressions, indentations, and The surface is scratched, which in turn affects the appearance of the aluminum sheet metal 5, leading to an increase in the appearance defect rate, thereby increasing the production cost.

In order to solve the problem that the existing mold easily causes damage to the surface of the aluminum sheet metal 5, as shown in Figure 1-3, the embodiment of the present application provides a mold, including an upper mold 1 and a lower mold 2,

The upper mold 1 includes an upper mold base 11, a forming punch 12 and a forming limiting punch 13, and the lower mold 2 includes a lower mold base 21, a forming binder block 22, a sliding forming die 23 and an elastic mechanism 24, wherein the upper mold base 11 is used to fix and drive the forming punch 12 and the forming limit punch 13 to move, the forming punch 12 is used to shape and limit the upper surface of the aluminum sheet metal 5, and the forming pressing block 22 is used to shape the aluminum sheet metal The lower surface of 5 is molded and limited, and the two cooperate with each other when the upper mold 1 and the lower mold 2 are closed, and the sliding forming die 23 is carried out by the forming limit punch 13 when the upper mold 1 and the lower mold 2 are closed. The limit makes the forming punch 12 and the sliding forming die 23 form an accommodation gap for accommodating the aluminum sheet metal 5, thereby ensuring that the sliding forming die 23 can provide a constant force for the aluminum sheet metal 5 to prevent the aluminum sheet metal from 5 Pressing and stamping appear on the surface. The forming punch 12 and the forming limiting punch 13 are all fixed on the upper mold base 11 and protrude from the bottom of the upper mold base 11. The forming punch 12 has a first main plane 122 and a molding surface 121, and the molding surface 121 Located on the bottom and both sides of the forming punch 12, and set around the edge of the first main plane 122, the forming surface 121 of the forming punch 12 located on the bottom surface and both sides passes through a circular arc transition, and the aluminum sheet metal 5 is being bent and formed At this time, the surface of the aluminum sheet metal 5 close to the forming punch 12 side gradually fits the forming surface 121 completely to realize bending and forming. The forming limiting punch 13 has a second main plane 132 and two limiting surfaces 131. The two limiting surfaces 131 are respectively located on both sides of the forming limiting punch 13, and are arranged symmetrically with respect to the second main plane 132. The forming die 23 is in contact, preventing the sliding forming die 23 from continuing to approach the forming punch 12, the forming punch 12 is adjacent to the forming limiting punch 13 and the first main plane 122 is opposite and parallel to the second main plane 132;

Specifically, the sliding forming die 23 is arranged on the lower die base 21 and together with the lower die base 21 forms a forming press groove for accommodating the molding binder 22, and the top of the forming binder 22 is in contact with the bottom of the forming punch 12. Matching, and can reciprocate vertically in the forming binder groove, the side of the sliding forming die 23 facing the forming pressing block 22 is the mating surface 231, and the elastic mechanism 24 is arranged on the sliding forming die 23 away from the forming pressing material One end of the block 22 is fixedly connected with the lower mold base 21. In order to realize the limiting effect of the forming limiting punch 13, the matching surface of the limiting surface 131 of the forming limiting punch 13 and the sliding forming die 23 in the present application 231 matching fit, when the upper die 1 and the lower die 2 are pressed together, the forming limit punch 13 first contacts the sliding forming die 23 and resists the sliding forming die 23 to prevent it from continuing to approach the forming pressing block 22 Direction movement, at this moment, formed accommodating gap 232 between forming punch 12 and sliding forming die 23, and this accommodating gap 232 is used for accommodating the aluminum sheet metal 5 of gradual change thickness, in order to make the aluminum sheet metal 5 The bending effect can meet the process requirements. The accommodation gap 232 in this application needs to match the size of the aluminum sheet metal 5. This application uses the forming limiting punch 13 to limit the sliding forming die 23, so that the sliding forming The die 23 can always exert a constant force on the aluminum sheet metal 5 during bending and forming, thereby avoiding the appearance of the aluminum sheet metal 5 due to uneven force.

Specifically, the lower mold base 21 of the present application includes a lower template 211 and a lower mold backing plate 212, the lower mold base 21 is used to fix the lower template 211, and provides a movable space for the molding binder block 22 and the sliding molding die 23, the lower mold base 21 The template 211 is arranged on the backing plate 212 of the lower mold, and the side of the lower template 211 facing the sliding forming die 23 is provided with a groove 213 for accommodating the elastic mechanism 24, and the end of the elastic mechanism 24 away from the forming binder block 22 is fixed in the groove 213 In this application, the elastic mechanism 24 may be a spring 31 .

A groove 213 is provided on the lower template 211, and the spring 31 is fixed in the groove 213 to limit the movement path of the spring 31, which effectively prevents the overall bending of the spring 31 due to a large deformation when it is compressed by force. When the compression force is released, if the spring 31 breaks away from the original movement path and bends as a whole, then there is no guarantee that the spring 31 can rely on the restoring force to push the sliding forming die 23 to act on the aluminum sheet metal 5 for bending and forming. Since the spring 31 is prevented from limiting its movement path in the groove 213, and the spring 31 drives back the slide forming die 23 to move toward the lower template 211 under compression, in order to prevent the lower template 211 from hindering the movement of the slide forming die 23 , the application leaves a sliding gap 214 between the lower template 211 and the sliding forming die 23 for the sliding forming die 23 to slide under the action of the spring 31 .

The lower mold 2 of the present application also includes a roller core 25, the roller core 25 is rotatably arranged on the side of the top of the sliding forming die 23 close to the forming binder block 22, the sliding forming die 23 has a top surface 233, and the rolling core 25 is respectively connected to The top surface 233 and the matching surface 231 are tangent so that the top surface 233 and the matching surface 231 form a circular arc transition surface. The roller core 25 is in rotational contact with the aluminum sheet metal 5 during the gradual contact between the limiting surface 131 and the mating surface 231 , effectively preventing the aluminum sheet metal 5 from scratching the surface due to relative contact with the surface of the sliding forming die 23 . The rolling core 25 of the present application can be a tungsten steel mandrel, because tungsten steel has the advantages of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc., especially it can still maintain relatively high hardness at high temperatures, It has a high service life and reduces the maintenance cost of the mold to a certain extent.

Specifically, the upper mold base 11 of the present application includes an upper mold backing plate 112 and an upper template 111, the upper mold 111 is arranged at the lower end of the upper mold backing plate 112, and the forming punch 12 and the forming limiting punch 13 pass through the upper template 111 is fixed on the backing plate 112 of the upper mold. During the clamping process of the upper mold 1 and the lower mold 2, the aluminum sheet metal 5 is gradually bent, and the bent part is lifted and gradually pressed by the sliding forming die 23 to approach the forming pressure material. The force in the direction of the block 22, in order to avoid scratching the bent part and the bent part and damage the aluminum sheet metal 5, the application provides an avoidance space at the position where the upper template 111 is close to the forming punch 12.

The mold of the present application also includes an elastic force transmission assembly 3, the elastic force transmission assembly 3 is connected to the molding binder 22, and the elastic force transmission assembly 3 provides support for the molding binder 22 so as to realize the molding pressure of the molding binder 22. Reciprocating motion in the vertical direction in the slot.

Specifically, the elastic force transmission component 3 includes a spring 31 and a support rod 32, the support rod 32 runs through the lower mold backing plate 212, and one end of the support rod 32 is connected to the spring 31, and the other end is connected to the forming binder block 22;

When the upper mold 1 and the lower mold 2 are pressed together, the forming binder block 22 transmits the pressure to the support rod 32, and the support rod 32 compresses the spring 31;

When the upper mold 1 is separated from the lower mold 2, the compressed spring 31 transmits the restoring force to the support rod 32 to support the reset of the molding binder 22 until the upper plane of the molding binder 22 is in contact with the top surface 233 of the sliding molding die 23 flat.

In addition, the elastic force transmission assembly also includes a limit block 33, which is arranged at one end of the support rod 32 connected to the spring 31, and the support rod 32 supports the forming press block 22 to the upper plane of the forming press block 22 and slides the forming When the top surface 233 of the die 23 is level, the limit block 33 is in contact with the bottom surface of the lower die backing plate 212, thereby restricting the movement of the support rod 32 and preventing the forming binder block 22 from breaking away from the forming binder groove.

When the aluminum sheet metal 5 is placed on the forming binder block 22, in order to avoid displacement of the aluminum sheet metal 5 when the upper mold 1 and the lower mold 2 are pressed together, the present application also sets a Positioning block 4, part of positioning block 4 protrudes from forming binder block 22, and positioning block 4 is used to limit the position of aluminum sheet metal 5 to prevent its displacement from affecting the bending and forming effect.

In the mold provided in this embodiment, a limit forming punch 12 is set on the upper mold base 11, and a sliding forming die 23 is set on the lower mold base 21. When the upper mold 1 and the lower mold 2 move relative to each other until the upper mold 1 presses the lower mold At 2 o'clock, the sliding forming die 23 is limited by the limiting forming punch 12 to provide a gradually changing accommodation gap 232 for the forming punch 12 and the sliding forming die 23 for accommodating aluminum sheet metal with gradually changing thickness 5. Due to the limitation of the limit forming punch 12 to the sliding forming die 23, the force of the sliding forming die 23 on the aluminum sheet metal 5 remains consistent, thereby reducing the presence of aluminum sheet metal 5 in the bending process. The appearance defect rate, thereby reducing the production cost.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a kind of mould, it is characterised in that including upper mould and lower mould,

The upper mould includes upper mould matrix, forming convax mould and is molded spacing punch-pin, and the forming convax mould and the shaping are spacing Punch-pin is each attached on the upper mould matrix and protrudes from the bottom of the mould matrix on described, and the forming convax mould has first Principal plane and forming surface, the forming surface are located at the bottom and both sides of the forming convax mould, and around the primary principal plane Edge set, the spacing convex mold of the shaping has secondary principal plane and two confined planes, two confined planes difference positions In the both sides of the spacing punch-pin of the shaping, and be symmetrical arranged relative to the secondary principal plane, the forming convax mould with it is described into The spacing punch-pin of type is disposed adjacent and the primary principal plane is relative and parallel with the secondary principal plane；

The lower mould includes lower mould matrix, shaping binder block, slides molding concave die and elastic mechanism, the slip molding concave die Be arranged on lower mould matrix and be collectively forming with the lower mould matrix shaping binder groove of the accommodating shaping binder block, it is described into The top of type binder block and the bottom of the forming convax mould match, and can be vertically past in the shaping binder groove Multiple motion, the side for sliding molding concave die towards the shaping binder block is the mating surface matched with the confined planes, The elastic mechanism is arranged on the one end of the slip molding concave die away from the shaping binder block and solid with the lower mould matrix It is fixed to be connected, the accommodating gap that the size left between the forming surface and the mating surface with moulding material matches；

The confined planes of the spacing punch-pin of shaping are fitted with the mating surface matching of the slip molding concave die, described When upper mould is closed with the lower molding, the spacing punch-pin of shaping contacts the slip molding concave die and props up described slide at first Type cavity plate prevents it from continuing towards the direction motion close to the shaping binder block.

2. mould according to claim 1, it is characterised in that the lower mould matrix includes lower template and lower mold backing plate, institute State lower template to be arranged in the lower mold backing plate, the lower template is towards the side of the slip molding concave die provided with accommodating described The groove of elastic mechanism, the one end of the elastic mechanism away from the shaping binder block is fixed in the groove, the lower mould Left between plate and the slip molding concave die for it is described slip molding concave die the lower template with it is described shaping binder block it Between the glade plane space that slides.

3. mould according to claim 1 or 2, it is characterised in that the elastic mechanism is spring.

4. mould according to claim 1, it is characterised in that the upper mould matrix includes upper die plate and cope plate, institute The lower end that cope plate is arranged on the upper die plate is stated, the forming convax mould both passes through the upper mould with the spacing punch-pin of shaping Plate is fixed on the upper die plate, and the cope plate is described to avoid provided with space is avoided close to the position of the forming convax mould The moulding material of bending when upper mould is with the lower mould matched moulds.

5. mould according to claim 1, it is characterised in that the lower mould also includes rolling core, the rolling core, which is rotated, to be set At the top of the slip molding concave die close to the side of the shaping binder block, the slip molding concave die has top surface, institute State rolling core tangent with the top surface and the mating surface respectively.

6. mould according to claim 5, it is characterised in that the rolling core is wolfram steel plug.

7. mould according to claim 5, it is characterised in that also including elastic power transmission component, the elastic power transmission component It is connected with the shaping binder block, the elastic power transmission component provides holding power to realize the shaping for the shaping binder block Reciprocating motion of the binder block in the shaping binder groove vertically.

8. mould according to claim 7, it is characterised in that the elastic power transmission component includes spring and support bar, institute State support bar through the lower mold backing plate, and one end of the support bar with the spring to be connected, the other end is pressed with the shaping Expect that block is connected；

When the upper mould is closed with the lower molding, pressure is reached support bar by the shaping binder block, and the support bar compresses institute State spring；

When the upper mould is separated with the lower mould, restoring force is reached support bar to support the shaping to press by the spring of compression Expect that the upper plane of block reset to the shaping binder block is equal with the top surface for sliding molding concave die.

9. mould according to claim 1, it is characterised in that also including some locating pieces, the locating piece is arranged on institute State on shaping binder block and the shaping binder block is protruded in part.

10. mould according to claim 8, it is characterised in that the elastic power transmission component also includes limited block, the limit Position block is arranged on one end that the support bar is connected with the spring, be molded described in the they sup-port binder block to it is described into When the upper plane of type binder block is equal with the top surface for sliding molding concave die, the limited block and the bottom surface of the lower mold backing plate Fit.