阅读说明：本技术 一种模锻制坯的弯曲模具 (Bending die for die forging blank making ) 是由 陆长青 吴傲宗 于宜洛 张娜娜 孙海霞 郭晓晓 王永健 刘金蕾 卢振强 于 2021-08-25 设计创作，主要内容包括：一种模锻制坯的弯曲模具,包括上模和下模,上模的下表面设置有上模型槽,下模的上表面设置有下模型槽,下模型槽中设有凸出于型槽底面的凸起部,上模型槽中设有与凸起部相对应的上凹部,凸起部和上凹部均沿模具的宽度方向水平延伸；下模型槽的凸起部上设有用于约束坯料水平移动的水平约束凹槽,水平约束凹槽的中心轴线与下模型槽的中心轴线重合,且水平约束凹槽关于其中心轴线对称；上模型槽和下模型槽设有用于引导坯料沿模具宽度方向单侧流动的、上下对应的水平弯曲引导凹槽,水平弯曲引导凹槽的中心轴线在模具宽度方向上偏离下模型槽的中心轴线,且水平弯曲引导凹槽中心轴线两侧互不对称。本发明可同时实现坯料在水平和垂直两个方向的复合弯曲。(A bending die for die forging blank manufacturing comprises an upper die and a lower die, wherein an upper die groove is formed in the lower surface of the upper die, a lower die groove is formed in the upper surface of the lower die, a protruding portion protruding out of the bottom surface of the groove is arranged in the lower die groove, an upper concave portion corresponding to the protruding portion is arranged in the upper die groove, and the protruding portion and the upper concave portion both horizontally extend along the width direction of the die; a horizontal constraint groove for constraining the horizontal movement of the blank is arranged on the convex part of the lower die type groove, the central axis of the horizontal constraint groove is superposed with the central axis of the lower die type groove, and the horizontal constraint groove is symmetrical about the central axis of the horizontal constraint groove; the upper die type groove and the lower die type groove are provided with horizontal bending guide grooves which are used for guiding blanks to flow along one side of the width direction of the die and correspond up and down, the central axis of each horizontal bending guide groove deviates from the central axis of the lower die type groove in the width direction of the die, and the two sides of the central axis of each horizontal bending guide groove are not symmetrical with each other. The invention can realize the composite bending of the blank in the horizontal and vertical directions simultaneously.)

1. The utility model provides a bending die of die forging base, includes mould and lower mould, and the lower surface of going up the mould is provided with mould groove, and the upper surface of lower mould is provided with lower mould groove, is equipped with the bulge in the bellying of type groove bottom surface in the lower mould groove, goes up the last concave part that is equipped with in the mould groove and corresponds with the bellying, goes up the concave part and caves in to the groove top surface in last mould groove, and the width direction level that mould was all followed to bellying and last concave part extends its characterized in that: a horizontal constraint groove for constraining the horizontal movement of the blank is arranged on the convex part of the lower die type groove, the central axis of the horizontal constraint groove is superposed with the central axis of the lower die type groove, and the horizontal constraint groove is symmetrical about the central axis; the upper die type groove and the lower die type groove are provided with horizontal bending guide grooves which are used for guiding blanks to flow along one side of the width direction of the die and correspond up and down, the central axis of each horizontal bending guide groove deviates from the central axis of the lower die type groove in the width direction of the die, and the two sides of the central axis of each horizontal bending guide groove are not symmetrical with each other.

2. The die-forging blank-making bending die according to claim 1, wherein: the upper concave part of the upper die groove is provided with an inwards-sunk horizontal constraint groove, and the horizontal constraint groove of the upper concave part and the horizontal constraint groove of the protruding part are arranged up and down oppositely.

3. The bending die for swaging a blank according to claim 1 or 2, wherein: the cross section of the horizontal constraint groove is arc-shaped or oval.

4. The die-forging blank-making bending die according to claim 1, wherein: one side of the horizontal bending guide groove is an inclined side wall capable of contacting with the blank, so that the blank is guided to flow along the inclined side wall to the opposite side in the mold closing process, and the horizontal bending of the blank along the width direction of the mold is realized.

5. The die-forging blank-making bending die according to claim 4, wherein: the inclination of the inclined side wall of the horizontal bending guide groove on the lower die type groove is 45-70 degrees.

6. The die-forging blank-making bending die according to claim 4, wherein: the bottom of the inclined side wall on the horizontal bending guide groove extends horizontally to the opposite side to form a horizontal plane, so that an open structure is formed on one side in the width direction of the die after the upper die and the lower die are closed.

7. The die-forging blank-making bending die according to claim 4, wherein: and a restraint side wall is arranged on the other side of the horizontal bending guide groove opposite to the inclined side wall, and after the upper die and the lower die are closed, the top surface of the restraint side wall is matched with the upper die to form a semi-open structure or a closed structure.

8. The bending die for swaging blanks of claim 6 or 7, wherein: a plurality of horizontal bending guide grooves are formed in the lower die type groove, and the flowing directions of the blanks guided by the horizontal bending guide grooves are the same or not completely the same.

Technical Field

The invention belongs to the field of design of forging dies, and relates to a bending die for die forging and blank making.

Background

The bending blank-making process step is an essential blank-making process step for forming a plurality of die forging pieces, and aims to enable a blank to be closer to the general shape of the forging pieces so as to facilitate better flowing and filling forming of metal, avoid forming defects, improve the forming utilization rate of materials, reduce the forming force and energy consumption of equipment and prolong the service life of a die. The implementation mode of the bending step is that the blank is placed in a die bending type groove, the blank is subjected to bending deformation in the moving direction of the die under the action of the die bending type groove through the closing movement of an upper die and a lower die, the deformed blank is placed in the die forging type groove in two modes according to the main body bending mode of the die forging type groove, firstly, the blank is placed in the die forging type groove in a translation mode to be matched with the bending shape mainly in the vertical direction, and the blank is placed in the die forging type groove in the other mode, the blank is rotated by 90 degrees by the axis of the main body of the blank, and the blank is matched with the bending shape mainly in the horizontal direction.

The structural design of the prior bending blank-making type groove has the following defects that: firstly, the technological requirements of the composite bending shape of the die forging type groove in the vertical direction and the horizontal direction on the shape of the blank cannot be well considered, and only one of the die forging type groove and the blank is taken as the main material; and secondly, the blank cannot be bent in the horizontal direction by the vertical movement of the die, so that the blank can be conveniently moved into the die forging type groove without rotating operation to match the bent shape in the horizontal direction and the positioning of the blank is facilitated. The method has the disadvantages that for the die forging type groove with the composite bending shape, in order to cover the type groove with the blank and avoid the forming defect, the blank has to be enlarged, which increases the material consumption, the energy consumption of the equipment and the service life of the die; for the mode of rotating 90 degrees after bending and placing the blank into the die forging type groove, because the blank is stretched and flattened and deformed in the bending process, the mutually-contacted parts are the open deformation parts in the bending process when the blank is placed into the die forging type groove, and because the shape is not constrained, the blank is difficult to stably contact and accurately position, the operation difficulty is caused, the labor intensity is increased, the production efficiency is low, the forming defect is easy to generate, the process is unstable, or the blank has to be increased to solve the problems, and meanwhile, the material consumption is increased, the equipment energy consumption is increased, and the service life of the die is reduced.

Disclosure of Invention

The invention aims to provide a die forging blank-making bending die aiming at the defects of the structural design of the conventional bending blank-making groove, and the die forging blank-making bending die can meet the process requirements of composite bending in two directions of a blank or horizontal bending and easy positioning after bending in a simple mode on the premise of not increasing a horizontal movement mechanism or vertically converting the horizontal movement mechanism into the horizontal movement mechanism.

In order to achieve the purpose, the invention adopts the technical scheme that: a bending die for die forging blank manufacturing comprises an upper die and a lower die, wherein an upper die groove is formed in the lower surface of the upper die, a lower die groove is formed in the upper surface of the lower die, a protruding portion protruding out of the bottom surface of the groove is formed in the lower die groove, an upper concave portion corresponding to the protruding portion is formed in the upper die groove, the upper concave portion is sunken towards the top surface of the upper die groove, the protruding portion and the upper concave portion horizontally extend along the width direction of the die, a horizontal restraining groove used for restraining horizontal movement of a blank is formed in the protruding portion of the lower die groove, the central axis of the horizontal restraining groove is coincident with the central axis of the lower die groove, and the horizontal restraining groove is symmetrical about the central axis of the horizontal restraining groove; the upper die type groove and the lower die type groove are provided with horizontal bending guide grooves which are used for guiding blanks to flow along one side of the width direction of the die and correspond up and down, the central axis of each horizontal bending guide groove deviates from the central axis of the lower die type groove in the width direction of the die, and the two sides of the central axis of each horizontal bending guide groove are not symmetrical with each other.

The upper concave part of the upper die groove is provided with an inwards-sunk horizontal constraint groove, and the horizontal constraint groove of the upper concave part and the horizontal constraint groove of the protruding part are arranged up and down oppositely.

The cross section of the horizontal constraint groove is arc-shaped or oval.

One side of the horizontal bending guide groove is an inclined side wall capable of contacting with the blank, so that the blank is guided to flow along the inclined side wall to the opposite side in the mold closing process, and the horizontal bending of the blank along the width direction of the mold is realized.

The inclination of the inclined side wall of the horizontal bending guide groove on the lower die type groove is 45-70 degrees.

The bottom of the inclined side wall of the horizontal bending guide groove horizontally extends to the opposite side to form a horizontal plane, and an open structure is formed on one side in the width direction of the die after the upper die and the lower die are closed.

And a restraint side wall is arranged on the other side of the horizontal bending guide groove opposite to the inclined side wall, and after the upper die and the lower die are closed, the top surface of the restraint side wall is matched with the upper die to form a semi-open structure or a closed structure.

A plurality of horizontal bending guide grooves are formed in the lower die type groove, and the flowing directions of the blanks guided by the horizontal bending guide grooves are the same or not completely the same.

The invention has the beneficial effects that: the invention is based on the existing bending die, does not increase the horizontal movement mechanism or vertically convert into the horizontal movement mechanism, only improves the structure of the profiled groove, sets the horizontal restraint groove to restrain the horizontal movement of the blank, sets the horizontal bending guide groove to guide the blank to bend towards the horizontal direction, thereby the horizontal direction bending of the blank can be realized under the action of the two structures, and the original profiled groove structure of the die can also realize the vertical bending of the blank, therefore, in the die closing process of the die, the composite bending in the horizontal direction and the vertical direction can be simultaneously realized, and simultaneously, the blank can be flattened and deformed to a certain extent.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 6 is a cross-sectional view taken along line D-D of FIG. 2;

FIG. 7 is a bottom view of the upper die;

FIG. 8 is a top view of the lower die;

the labels in the figure are: 1. lower mould, 2, last mould, 3, horizontal restraint recess, 4, go up the concave part, 5, lower mould horizontal bending guide groove I, 6, go up mould horizontal bending guide groove I, 7, lower mould horizontal bending guide groove II, 8, go up mould horizontal bending guide groove II, 9, go up mould type groove, 10, lower mould type groove, 11, bellying.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples, but the invention is not limited thereto.

Referring to fig. 1, 7 and 8, a bending die for die forging blank manufacturing includes an upper die 2 and a lower die 1, wherein an upper die groove 9 is formed on a lower surface of the upper die 2, a lower die groove 10 is formed on an upper surface of the lower die 1, a protrusion 11 protruding from a bottom surface of the lower die groove 10 is formed in the lower die groove 10, an upper recess 4 corresponding to the protrusion 11 is formed in the upper die groove 9, the upper recess 4 is recessed toward a top surface of the upper die groove 9, and the protrusion 11 and the upper recess 4 both horizontally extend in a width direction of the die, because a surface of the protrusion 11 is higher than those of the two side grooves, the protrusion 11 and the upper recess 4 bend an extrusion blank in a vertical direction after the die is closed.

In the present embodiment, as shown in fig. 8, the two protrusions 11 are provided, and correspondingly, the two upper recesses 4 are also provided, as shown in fig. 7.

In order to realize the horizontal bending of the blank while the blank is bent vertically, a structure for restraining the horizontal flow of the blank and a structure for guiding the horizontal bending of the blank are arranged in the groove of the die, so that the vertical bending and the horizontal bending of the blank can be realized simultaneously in the die closing process.

As shown in fig. 3 and 8, the structure for restricting the horizontal flow of the blank is a horizontal restriction groove 3 disposed in the middle of the protrusion 11, the central axis of the horizontal restriction groove 3 coincides with the central axis of the lower die-shaped groove 10, the horizontal restriction groove 3 is symmetrical left and right with respect to the central axis thereof, the cross section of the horizontal restriction groove 3 is circular arc or oval, and preferably, the shape of the horizontal restriction groove 3 matches with the shape of the blank, so that the blank can be restricted left and right.

Alternatively, another horizontal constraining groove corresponding to the horizontal constraining groove 3 of the lower die 1 up and down may be provided at the middle position of the upper concave portion 4 of the upper die 2, so that the upper die 2 and the lower die 1 can clamp the blank up and down when they are clamped, and the horizontal constraining effect on the portion of the blank is better.

The structure of the horizontal bending of the guiding blank is a horizontal bending guiding groove which is arranged on the upper die type groove 9 and the lower die type groove 10 and corresponds up and down, the arrangement position of the horizontal bending guiding groove in the embodiment is shown in figures 4-8, and the horizontal bending guiding groove comprises a lower die horizontal bending guiding groove I5, an upper die horizontal bending guiding groove I6, a lower die horizontal bending guiding groove II 7 and an upper die horizontal bending guiding groove II 8, and the common characteristics of the lower die horizontal bending guiding groove I5, the upper die horizontal bending guiding groove I6, the lower die horizontal bending guiding groove II 7 and the upper die horizontal bending guiding groove II 8 are as follows: the central axis of the horizontal bending guide groove deviates from the central axis of the lower die-type groove 10 in the die width direction, and the two sides of the central axis of the horizontal bending guide groove are not symmetrical to each other, and one side of the horizontal bending guide groove is an inclined side wall capable of contacting with the blank to guide the blank to flow along the inclined side wall to the opposite side, so that the blank is horizontally bent in the die width direction. The inclination of the inclined side wall of the horizontally curved guide groove is 45-70 degrees.

As shown in fig. 4, 6, 7 and 8, the lower die horizontal bending guide groove i 5 and the upper die horizontal bending guide groove i 6 are shown, the inclined side wall of the lower die horizontal bending guide groove i 5 is an arc-shaped side wall on the right side, and the bottom of the groove horizontally extends to the edge of the lower die in the width direction leftward; the slope lateral wall of going up mould horizontal bending guide groove I6 is the arc lateral wall on right side, and the roof of a groove level extends to the border of last mould width direction left, and consequently lower mould horizontal bending guide groove I5 and last mould horizontal bending guide groove I6 left side are open structure, and lower mould horizontal bending guide groove I5 and last mould horizontal bending guide groove I6's right side interval is less, forms closed structure. In the process of closing the upper die and the lower die, the lower die horizontal bending guide groove I5 and the upper die horizontal bending guide groove I6 can guide the blank to flow leftwards, namely, horizontally bend leftwards.

As shown in fig. 5, 6, 7 and 8, which show a lower die horizontal bending guide groove ii 7 and an upper die horizontal bending guide groove ii 8, the inclined side wall of the lower die horizontal bending guide groove ii 7 is an inclined straight surface on the left side, the inclined straight surface is smoothly transited to the bottom of a horizontally extending groove, and a restraining side wall is arranged on the other side opposite to the inclined straight surface, so that the horizontal flowing degree and shape of the blank can be restrained; the inclined side wall of the upper die horizontal bending guide groove II 8 is an arc-shaped side wall on the left side; the left side and the right side of the lower die horizontal bending guide groove II 7 and the upper die horizontal bending guide groove II 8 are both of a semi-open structure. During the closing process of the upper die and the lower die, the lower die horizontal bending guide groove II 7 and the upper die horizontal bending guide groove II 8 can guide the blank to flow rightwards, namely, the blank is bent rightwards and horizontally.

In this embodiment, the two sets of horizontally curved guide grooves guide the flow of the billet in opposite directions, respectively. In actual production, the guiding direction of the horizontal bending guiding groove can be selected according to the target shape of the blank, and can be opposite or the same. The arrangement quantity and the position of the horizontal bending guide grooves are also arranged according to actual requirements so as to meet the requirement of blank making.

When the die is used, a blank is placed on a lower die type groove 10, the blank is supported by a horizontal constraint groove 3, then an upper die 2 is closed downwards, the blank is bent in the vertical direction under the action of pressing down of an upper die groove 9, when the blank is contacted with an inclined side wall on a lower die horizontal bending guide groove I5 and a lower die horizontal bending guide groove II 7 on a lower die 1, the blank flows in the horizontal direction along the inclined side wall under the action of extrusion force, namely is bent horizontally, and the blank is clamped under the action of closing the horizontal constraint groove 3 and an upper concave part 4 at the moment, so that the horizontal movement of the blank is constrained; when the upper die 2 is continuously pressed downwards, so that the inclined side walls on the upper die horizontal bending guide groove I6 and the upper die horizontal bending guide groove II 8 are in contact with the upper part of the blank, the upper part of the blank also flows horizontally; under the common cooperation of the structures, the bending in the vertical direction and the bending in the horizontal direction are finished in the one-time die assembly process of the blank.

In addition, the invention can also carry out quantitative and shape-setting deflection on the blank according to the requirement of blank-making shape and the requirement of die forging discharging positioning.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.