CN212945192U

CN212945192U - Bending die and forging die for vehicle cross arm

Info

Publication number: CN212945192U
Application number: CN202021382014.1U
Authority: CN
Inventors: 李志杰; 钟军; 彭丽芳
Original assignee: Hst Metals Co ltd
Current assignee: Hst Metals Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-04-13
Anticipated expiration: 2030-07-14

Abstract

The utility model relates to a forge frock technical field, provide a bending die and forge mould for vehicle xarm. Bending mould for a vehicle cross arm, comprising: the die comprises an upper die and a lower die, wherein the upper die limits a first concave part, the first concave part comprises symmetrically arranged concave parts, and the two concave parts are both positioned at the end part of the first concave part; the lower die is positioned below the upper die, a first preset die cavity is limited on the surface of the upper die and the surface of the lower die, and the first preset die cavity is of a symmetrical structure. The bending die and the forging die for the cross arm of the vehicle are arranged to be symmetrical structures, so that the stress is balanced, and the service life of the bending die is prolonged; and the bending workpiece made by the bending die can be simultaneously processed into two vehicle cross arms through forging processing, so that the processing efficiency of the vehicle cross arm is higher.

Description

Bending die and forging die for vehicle cross arm

Technical Field

The utility model relates to a forge frock technical field, especially relate to a bending die and forge mould for vehicle xarm.

Background

In vehicle suspension systems, particularly off-road vehicle suspension systems, the cross-arm plays a critical weight-bearing role. In the related technology, the cross arm is generally processed by adopting a steel casting and then finish machining is carried out on the steel casting, the finish machining process required by the steel casting is complex, the machining period is long, and the cost of a tool and labor used for machining is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a bending die for a vehicle cross arm, which is arranged in a symmetrical structure, has balanced stress and is beneficial to prolonging the service life of the bending die; and the bending workpiece made by the bending die can be simultaneously processed into two vehicle cross arms through forging processing, so that the processing efficiency of the vehicle cross arm is higher.

The utility model discloses still provide a forge mould for vehicle xarm.

According to the utility model discloses a bending die for vehicle xarm of first aspect embodiment includes:

the upper die limits a first concave part, the first concave part comprises symmetrically arranged concave parts, and the two concave parts are both positioned at the end part of the first concave part;

the lower die is positioned below the upper die, a first preset die cavity is limited on the surface of the upper die and the surface of the lower die, and the first preset die cavity is of a symmetrical structure.

According to the utility model discloses a bending die for vehicle xarm, including last mould and lower mould, it sets up first interior recess to go up the mould, first interior recess includes two depressed parts, two depressed part symmetries set up, make bending die can process out the crooked work piece of symmetry, and the both ends of crooked work piece all are equipped with the arch that is used for processing out the crooked turning position of two vehicle xarms, make every crooked work piece of processing out, can forge out two vehicle xarms simultaneously, the machining efficiency of vehicle xarm is higher, and the both sides atress of going up mould and lower mould is more even, help promoting bending die's life.

According to the utility model discloses an embodiment, go up the surface of mould and include the lateral wall face and the last wall of first interior recess, it includes the horizontal plane to go up the wall, the lateral wall face with the horizontal plane forms first preset contained angle, the first bending angle of vehicle xarm with the angle difference of first preset contained angle is 3 ~ 8.

According to the utility model discloses an embodiment, the upper wall face includes the inclined plane, the inclined plane with the lateral wall face establishes to the double-phase relative lateral wall of depressed part, the inclined plane with the horizontal plane forms the second and predetermines the contained angle, the second predetermines the contained angle with the angle difference of the second bending angle of vehicle xarm is 10 ~ 15.

According to the utility model discloses an embodiment, the horizontal plane includes first horizontal plane and second horizontal plane, first horizontal plane is connected the lateral wall face with the inclined plane, two are connected to the second horizontal plane the inclined plane.

According to the utility model discloses an embodiment, the lower mould is equipped with the interior concave part of second, the longitudinal section shape of the interior concave part of second is established to falling trapezoidal.

According to an embodiment of the present invention, the outer contour of the first preset cavity is smaller than the outer contour of the vehicle cross arm.

According to the utility model discloses a forge mould for vehicle xarm of second aspect embodiment, forge mould and above-mentioned embodiment including first forging mould, second the bending die for vehicle xarm, the first die cavity of predetermineeing that is used for crooked processing blank in order to obtain crooked work piece of bending die restriction, the second of first forging mould restriction is predetermine the die cavity and is used for forging crooked work piece is in order to obtain first forging, the third of second forging die restriction is predetermine the die cavity and is used for forging first forging is in order to obtain the second forging.

According to the utility model discloses an embodiment, the second is predetermine the fashioned first forging of die cavity and is equipped with a plurality of predetermined cross sections, the sectional area of predetermined cross section and its corresponding the cross-sectional area of the target cross section of second forging are than (1.03 ~ 1.08): 1.

According to an embodiment of the invention, the predetermined cross-section comprises at least one of a first cross-section corresponding to a longitudinal cross-section of the vehicle cross arm end mount and a second cross-section corresponding to a longitudinal cross-section of the corner position of the vehicle cross arm.

According to an embodiment of the invention, the third predetermined cavity shape is the same as the vehicle crossbar.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

Further, according to the utility model discloses a forge mould for vehicle xarm, including bending die, first forging mould and second forging mould, the blank can obtain the forging the same basically with the target product through a bending process and twice forging, can form two vehicle xarms after this forging cutting, effectively improves production efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art cross arm for a vehicle;

fig. 2 is a schematic structural diagram of a bending die according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a bent workpiece forged by the bending die according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a first forging die of the forging die according to the embodiment of the present invention;

fig. 5 is a schematic structural view of a first lower die of a first forging die of a forging die according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a second lower die of a second forging die of the forging die according to the embodiment of the present invention;

fig. 7 is a schematic structural view of a second upper die of a second forging die of the forging die according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a curved workpiece produced by the forging die according to an embodiment of the present invention comparing the shape of the curved workpiece with that of a second forging; wherein the dotted line indicates the profile shape of the curved workpiece and the solid line indicates the profile shape of the second forging;

fig. 9 is a schematic diagram showing a comparison of the shapes of the first forging and the second forging at the first cross section, which are made by the forging die of the embodiment of the present invention;

fig. 10 is a schematic diagram showing the shape comparison between the first forging and the second forging at the second cross section, which is made by the forging die of the embodiment of the present invention.

Reference numerals:

1: an upper die; 11: a first concave portion; 111: a recessed portion; 12: a side wall surface; 13: an upper wall surface; 131: a first horizontal plane; 132: a second horizontal plane; 133: an inclined surface;

2: a lower die; 21: a second concave portion;

3: a first forging die; 31: a first upper mold; 32: a first lower mold; 33: a second preset cavity;

41: a second upper mold; 411: positioning the recess; 42: a second lower mold; 421: positioning the projection;

5: a second forging; 51: a second region; 6: a first forging; 61: a first region; 7: bending the workpiece; 8: a vehicle cross arm;

h: the distance between the upper die and the lower die; a: a first bend angle; b: a second bend angle; a: a first preset included angle; b: a second preset included angle; C-C: a first cross-section; D-D: a second cross-section.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Embodiments of the first aspect of the present invention, as shown in fig. 2 and 3, provide a bending die for a vehicle cross arm, including: the die comprises an upper die 1 and a lower die 2, wherein the upper die 1 defines a first concave part 11, the first concave part 11 comprises symmetrically arranged concave parts 111, and the two concave parts 111 are both positioned at the end part of the first concave part 11; the lower die 2 is positioned below the upper die 1, a first preset cavity is limited by the surface of the upper die 1 and the surface of the lower die 2, and the first preset cavity is of a symmetrical structure.

Referring to fig. 1 to 3, the bending die is used for processing a blank into a bent workpiece 7, and the shape of the bent workpiece 7 is defined by a first preset cavity of the bending die, which is set to a symmetrical structure, that is, the bent workpiece 7 is set to a symmetrical structure. The vehicle cross arm 8 is of an asymmetric structure, the bending workpiece 7 is of a symmetric structure, so that two vehicle cross arms 8 which are symmetrically distributed can be processed by one bending workpiece 7, the two vehicle cross arms 8 are symmetrically distributed, the stress of the bending die is balanced, and the processing precision and the service life of the bending die are ensured.

The upper die 1 is limited to form a first concave part 11, the first concave part 11 comprises concave parts 111 which are symmetrically arranged, and the concave parts 111 are concave towards the upper die 1, so that bulges are symmetrically arranged on two sides of a first preset cavity, namely bulges are symmetrically arranged on two sides of the bent workpiece 7, the bulges are used for machining the bent corner positions of the vehicle cross arm 8, and the two bulges are used for machining the bent corner positions of the two vehicle cross arms 8.

The bending die of the embodiment is used for forging and processing the vehicle cross arm 8, every time a bending workpiece 7 is processed, two vehicle cross arms 8 can be processed at the same time, the processing efficiency of the vehicle cross arm 8 is higher, and the stress on the two sides of the upper die 1 and the lower die 2 is more uniform, so that the service life of the bending die is prolonged. Wherein the vehicle cross arm shown in figure 1 is suitable as a lower cross arm for an off-road vehicle.

In one embodiment, referring to fig. 2, the surface of the upper mold 1 includes a sidewall surface 12 and an upper wall surface 13 of the first concave portion 11, the upper wall surface 13 includes a horizontal surface, the sidewall surface 12 forms a first preset included angle a with the horizontal surface, and the angle difference between the first bending angle a of the vehicle cross arm 8 and the first preset included angle a is 3 ° to 8 °.

The position corresponding to the first preset included angle a formed by the side wall surface 12 and the horizontal plane is used for machining the position corresponding to the first bending angle a of the vehicle cross arm 8, and the position of the first bending angle a of the vehicle cross arm 8 is the corner position of the end part of the vehicle cross arm 8. As shown in fig. 1, the first bending angle a is an angle between a left side (or a right side) of the cross arm 8 of the vehicle and a horizontal line, and the horizontal line is a line parallel to a horizontal direction in space. Referring to fig. 3, the first predetermined included angle a is an included angle between the side edge of the bent workpiece 7 made by the bending die and a horizontal line, that is, an acute included angle formed by the below-described side wall surface 12 and the first horizontal surface 131 in the below-described embodiment. Referring to fig. 8, the first preset included angle a should be the same as the first bending angle a as much as possible, so as to avoid the material from overflowing the bending mold and being wasted, and improve the material utilization rate. In this embodiment, the angle difference between the first bending angle a and the first preset included angle a is limited to 3 ° to 8 °, that is, the first preset angle a is smaller than the first bending angle a, so that the bent workpiece 7 can be placed in the second preset cavity 33 of the first forging die 3 in the following embodiments, and the material of the bent workpiece 7 is prevented from overflowing the second preset cavity 33, so that the material is fully utilized.

In one embodiment, the upper wall surface 13 includes an inclined surface 133, the inclined surface 133 and the side wall surface 12 are two opposite side walls of the recess 111, the inclined surface 133 forms a second preset included angle B with the horizontal plane, and the angle difference between the second preset included angle B and the second bending angle B of the vehicle cross arm 8 is 10 ° to 15 °.

The position corresponding to the second preset included angle B formed by the inclined surface 133 and the sidewall surface 12 corresponds to a second bending angle B for machining the vehicle lateral arm 8, and the position of the second bending angle B of the vehicle lateral arm 8 is the corner position of the upper portion of the vehicle lateral arm 8. Here, referring to fig. 1, the second bending angle b is an angle between the upper side of the vehicle lateral arm 8 and a horizontal line, which is a line parallel to a horizontal direction in space. Referring to fig. 3, the second predetermined included angle B is an included angle between the upper side of the bent workpiece 7 made by the bending die and a horizontal line, that is, an acute included angle formed by the inclined surface 133 and the second horizontal surface 132 in the embodiment described below. Referring to fig. 8, the second preset included angle B is as same as the second bending angle B as possible, so as to avoid waste of the material due to overflow of the bending mold, and improve the material utilization rate. In this embodiment, the angle difference between the second preset included angle B and the second bending angle B is limited to be 10 ° to 15 °, that is, the second preset angle B is greater than the second bending angle B, so that the bent workpiece 7 can be placed in the second preset cavity 33 of the first forging die 3 in the following embodiments, and the material of the bent workpiece 7 is prevented from overflowing the second preset cavity 33, so that the material is fully utilized.

The included angles in the above embodiments are all acute angles formed by two surfaces.

In one embodiment, referring to fig. 3, the horizontal planes include a first horizontal plane 131 and a second horizontal plane 132, the first horizontal plane 131 connecting the sidewall plane 12 with the inclined plane 133, and the second horizontal plane 132 connecting the two inclined planes 133. The side wall surface 12 and the inclined surface 133 are connected by the first horizontal surface 131, and the two inclined surfaces 133 are connected by the second horizontal surface 132, so that the upper die 1 can be conveniently machined, and the uniform stress of the upper die 1 can be facilitated.

In one embodiment, the first inner recess 11 further includes a communication portion communicating the two recesses 111, that is, the second horizontal surface 132 is recessed inward relative to the bottom plane of the upper die 1, so as to ensure that the recess depth of the recess 111 meets the forging requirement.

That is, the height of the first horizontal surface 131 at the upper die 1 is higher than the height of the second horizontal surface 132, and the height of the second horizontal surface 132 is higher than the height of the bottom plane of the upper die 1, so as to ensure that the shape of the first concave portion 11 satisfies the forging requirement.

Referring to fig. 2 and 3, a distance h is provided between the bottom plane of the upper die 1 and the top plane of the lower die 2, and the distance between the upper die 1 and the lower die 2 is used for defining the height of the bent workpiece 7, so that the accuracy of the height dimension of the bent workpiece 7 is ensured.

In one embodiment, as shown with reference to fig. 2 and 3, the lower die 2 is provided with a second concave portion 21, and the longitudinal sectional shape of the second concave portion 21 is set to be an inverted trapezoid. The lower half portion of the curved workpiece 7 is formed by forging and pressing the second inner concave portion 21 having an inverted trapezoidal longitudinal sectional shape, and the shape of the second inner concave portion 21 is simple, so that the lower die 2 can be easily and conveniently processed.

Wherein, the inverted trapezoid is an equilateral trapezoid to ensure bilateral symmetry of the bent workpiece 7, an included angle is formed between the side edge and the bottom edge of the inverted trapezoid, the included angle is also smaller than the included angle of the position of the vehicle cross arm 8, that is, the included angle is smaller than the included angle of the corresponding position of the second lower die of the second forging die in the following embodiments, and the angle difference is set to be 5 °.

In one embodiment, and as shown with reference to fig. 8, the first pre-set cavity has an outer profile that is smaller than the outer profile of the vehicle cross arm 8. The vehicle cross arm 8 is formed by multi-step forging, and after a blank is formed in the first preset cavity, the blank can be placed into the second preset cavity 33 and the third preset cavity in the following embodiment, so that the material is prevented from overflowing the second preset cavity 33 and the third preset cavity, and the full utilization of the material is ensured.

The embodiment of the second aspect of the utility model provides a forging mould for vehicle xarm 8, it is shown with reference to fig. 4 to 7 to refer to, including first forging mould 3, second forging mould and the bending die who is used for vehicle xarm 8, the first die cavity of predetermineeing that bending die limited is used for crooked processing blank in order to obtain crooked work piece 7, and the second that first forging mould 3 limited predetermines die cavity 33 and is used for forging crooked work piece 7 in order to obtain first forging 6, and the third that the second forging mould limited predetermines the die cavity and is used for forging first forging 6 in order to obtain second forging 5. The forging apparatus of this embodiment, including the bending die in the above embodiment, has all the advantages of the above embodiment, and is not described herein again.

The forging die comprises a bending die, a first forging die 3 and a second forging die, a blank is bent to obtain a bent workpiece 7 shown in fig. 3, the bent workpiece 7 shown in fig. 3 is referred to, the bent workpiece 7 is turned over by 90 degrees forwards and backwards, then the bent workpiece 7 is sequentially placed into the first forging die 3 and the second forging die, a first forging piece 6 and a second forging piece 5 are sequentially obtained through twice forging, and a forging piece basically the same as a target product can be obtained through once bending and twice forging. Moreover, the forging die of the embodiment can produce target products of two vehicle cross arms 8 after cutting along the symmetrical line of the second forging piece 5, and the bending die, the first forging die 3 and the second forging die are all two-in-one dies, so that the production efficiency is effectively improved. The bent workpiece 7 after bending can be completely placed in the second preset cavity 33 of the first forging die 3, and the possibility of material discharging out of the cavity during forging is reduced.

The first forging die 3 includes a first upper die 31 and a first lower die 32, and the first upper die 31 and the first lower die 32 define a second preset cavity 33; the second forging die includes a second upper die 41 and a second lower die 42, and the second upper die 41 and the second lower die 42 define a third preset cavity. The first forging die 3 is used for pre-forging, the shape and the size of the first forged piece 6 obtained through pre-forging are similar to those of a product of the vehicle cross arm 8, so that the shape and the size of the first forged piece 6 are controlled, the first forged piece 6 directly forms good appearance quality and size precision, and the subsequent machining allowance is minimized; and finally forging the second forged piece 5 formed by the finish forging through a second forging die, so that the requirement of precise and clean forming of the product can be met, and the material utilization rate is improved.

In one embodiment, the second upper mold 41 is provided with a positioning recess 411, the second lower mold 42 is provided with a positioning protrusion 421, and the positioning protrusion 421 is matched with the positioning recess 411 to ensure that the second upper mold 41 and the second lower mold 42 are accurately positioned. The first upper die and the first lower die are also provided with adaptive positioning structures, so that the first upper die and the first lower die are accurately positioned.

In one embodiment, the first forged piece 6 formed by the second preset cavity 33 is provided with a plurality of preset sections, and the ratio of the sectional area of each preset section to the sectional area of the corresponding target section of the second forged piece 5 is (1.03-1.08): 1. During production and preparation, the shape and the size of the second preset cavity 33 are similar to those of the third preset cavity, but the sectional area of the preset section of the first forging 6 is properly larger than that of the second forging 5, so that the forming precision of the first forging 6 can be ensured, materials can be kept in the second preset cavity 33, and material waste is avoided.

The preset cross section is the key cross section of the first forging 6, and corresponds to the end part or the corner of the cross arm 8 of the vehicle, so that the machining precision and the strength of the key part of the cross arm 8 of the vehicle are guaranteed.

In one embodiment, the predetermined cross-section includes at least one of a first cross-section corresponding to a longitudinal cross-section of the end mount of the vehicle cross arm 8 and a second cross-section corresponding to a longitudinal cross-section of the corner location of the vehicle cross arm 8.

Referring to the position of C-C shown in fig. 1 and 8, the preset cross section includes a first cross section (the shape of the first cross section can refer to the shape shown in fig. 9), the plurality of first cross sections are used for forming the mounting seat portion of the vehicle cross arm 8, the cross section area of the area where the plurality of first cross sections of the first forged piece 6 are located is slightly larger than the cross section area of the mounting seat area of the vehicle cross arm 8, namely, the ratio of the cross section areas is (1.03-1.08): 1. Similarly, referring to the position D-D shown in fig. 1 and 8, the preset cross section includes a plurality of second cross sections (the shape of the second cross sections may refer to the shape shown in fig. 10), the plurality of second cross sections are used for forming the corner positions of the vehicle cross arm 8, the cross section area of the area where the plurality of second cross sections of the first forged piece 6 are located is slightly larger than the cross section area of the corner positions of the vehicle cross arm 8, that is, the ratio of the cross section areas is (1.03-1.08): 1.

The second preset cavity 33 is designed to be basically consistent with the third preset cavity, only partial adjustment exists, and the outline area of the second preset cavity 33 and the outline area of the third preset cavity are kept at the level of (1.03-1.08): 1.

Referring to fig. 9 and 10, in the second region 51 of the second forging 5, the first region 61 of the first forging 6, the ratio of the cross-sectional area of the preset cross-section to the cross-sectional area of the target cross-section of the corresponding vehicle cross arm 8 is (1.03-1.08): 1, that is, the ratio of the cross-sectional areas of the C-C cross-section and the D-D cross-section of the first forging 6 to the second forging 5 is (1.03-1.08): 1. Wherein first region 61 and second region 51 illustrate the difference in shape of first forging 6 and second forging 5. Wherein, filling the position of the profile line corresponding to: the dotted line is the contour line of the first forging 6, and the solid line is the contour line of the second forging 5; and at the position of unfilled section lines, the first forging 6 and the second forging 5 have the same contour shape.

The ratio of the cross-sectional area of the preset cross-section to the target cross-section of the second forging 5 can be selected to be any value between 1.03 and 1.08, such as 1.05, and different ratios can be selected for different preset cross-sections.

In one embodiment, and referring to fig. 6 and 7, the third pre-form cavity is shaped the same as the vehicle crossbar 8, such that the second forging 5 has a shape and dimensions similar to the vehicle crossbar 8, ensuring that 95% of the area of the second forging 5 is a non-machined surface.

In the embodiment, the bent workpiece 7 is forged into the first forging 6, the ratio of the sectional area of the preset section of the first forging 6 to the sectional area of the corresponding section of the second forging 5 is (1.03-1.08): 1, the shape of the third preset cavity is the same as that of the vehicle cross arm 8, the maximum machining allowance of the second forging 5 obtained by machining can be controlled within 2mm, and 95% of the second forging 5 is a non-machined surface; the transfer fillet of the second forging 5 is basically kept consistent with the product shape of the vehicle cross arm 8; the material utilization rate reaches 85%, and the die has long service life and stable quality; and the investment of raw materials can be reduced, the machining period is greatly shortened, the cost of the cutter is reduced, and the production efficiency is improved.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A bending die for a vehicle cross arm, comprising:

2. The bending die for a vehicle cross arm according to claim 1, wherein the surface of the upper die comprises a side wall surface and an upper wall surface of the first concave portion, the upper wall surface comprises a horizontal surface, the side wall surface and the horizontal surface form a first preset included angle, and the angle difference between the first bending angle of the vehicle cross arm and the first preset included angle is 3-8 °.

3. The bending die for a vehicle cross arm according to claim 2, wherein the upper wall surface includes inclined surfaces, the inclined surfaces and the side wall surfaces are provided as two opposite side walls of the recess portion, the inclined surfaces form a second preset included angle with the horizontal plane, and an angle difference between the second preset included angle and a second bending angle of the vehicle cross arm is 10 ° to 15 °.

4. The bending die for a vehicle cross arm according to claim 3, wherein the horizontal planes include a first horizontal plane and a second horizontal plane, the first horizontal plane connecting the side wall plane and the inclined plane, the second horizontal plane connecting the two inclined planes.

5. The bending die for the vehicle cross arm according to any one of claims 1 to 4, wherein the lower die is provided with a second concave portion having a longitudinal sectional shape of an inverted trapezoid.

6. The bending mould for a vehicle cross arm according to any one of claims 1 to 4, wherein the outer contour of the first preset cavity is smaller than the outer contour of the vehicle cross arm.

7. A forging die for a vehicle cross arm, which is characterized by comprising a first forging die, a second forging die and the bending die for the vehicle cross arm as claimed in any one of claims 1 to 6, wherein the bending die is used for limiting a first preset cavity for bending a blank to obtain a bent workpiece, the first forging die is used for limiting a second preset cavity for forging the bent workpiece to obtain a first forging piece, and the second forging die is used for limiting a third preset cavity for forging the first forging piece to obtain a second forging piece.

8. The forging die for the vehicle cross arm according to claim 7, wherein the first forging formed by the second preset cavity is provided with a plurality of preset sections, and the ratio of the sectional area of each preset section to the sectional area of the corresponding target section of the second forging is (1.03-1.08): 1.

9. The forging die for a vehicle cross arm of claim 8, wherein the predetermined cross section includes at least one of a first cross section corresponding to a longitudinal cross section of the vehicle cross arm end mount and a second cross section corresponding to a longitudinal cross section of a corner location of the vehicle cross arm.

10. The forging die for the vehicle cross arm according to claim 7, wherein the third preset cavity is the same in shape as the vehicle cross arm.