A mold for side shaping of a negative angle structure part

Abstract

The application provides a mold for side shaping of a negative angle structure part at both ends, comprising an upper mold assembly and a lower mold assembly, wherein the mold assembly is provided with two groups of side shaping wedge units and side pressing core units which are matched with each other, so that the negative angle structure at both ends of the part along the length direction can be formed, the forming process and the labor intensity of the operator are simplified, and the side pressing core is first separated from the part along the longitudinal direction after forming, so that the demolding is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vehicle component molding mold technology, and in particular to a mold for side shaping of parts with negative angles at both ends. Background Technology

[0002] The rear floor crossbeam is a sub-beam component of the rear floor of a certain vehicle model, serving to support and strengthen the rear floor. This component supports the rear floor in the middle and connects to the longitudinal beams at both ends, featuring a negative angle structure. In addition to the negative angles at both ends, this component is also characterized by its slender shape (length * width dimensions: 1712mm * 137mm).

[0003] Please see Figure 1 , Figure 1 This is a schematic diagram of the process for forming the rear floor crossbeam of a vehicle in the prior art.

[0004] The mold for shaping and flanging one side of the rear floor beam is a casting mold, and its structure includes the mold body and two sets of devices for side shaping and flanging. The mold body consists of the upper mold base (not shown in the figure) and the lower mold base 2'. Figure 1 The image shows the lower mold base 2', with side shaping, flanging, and other devices mounted on the mold body of the lower mold base 2'. During production, the entire mold set is mounted on a press, and the upper mold base and its components move downwards. After the side pressure core presses the part, it drives the lower mold side shaping wedge to simultaneously side-shape the end of the part, causing it to plastically deform to achieve the structural shape required for welding.

[0005] Existing technology typically designs two sets of side-shaping mold cavities on the lower mold base 2': a first side-shaping mold cavity 21' and a second side-shaping mold cavity 22', which are used to side-shape both ends of the rear floor beam 1', with each end corresponding to a set of side-shaping mold cavities. After the first end 11' is side-shaped, the rear floor beam 1' needs to be rotated 180 degrees to place the second end 12' into the second side-shaping mold cavity. Figure 1 The middle arrow indicates the turning direction of the rear floor beam 1'. The required structural shape part can only be obtained by the press and mold operating twice.

[0006] In existing production methods, due to the relatively slender shape of the parts, 63% of the parts tend to drift out of the mold cavity and press during the production process, posing certain safety hazards. Furthermore, from an operational perspective, after one end is shaped, the part needs to be rotated 180 degrees to place the other end into the second set of side-shaping mold cavities. This requires two press and mold operations to obtain the required structural shape, which is quite cumbersome and puts a significant strain on the operators' workload.

[0007] How to solve the above-mentioned technical problems is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to provide a mold that can simultaneously shape the negative angle structural sides of both ends of a part in one mold closing operation.

[0009] This invention provides a mold for side shaping of parts with negative angles at both ends, comprising the following components:

[0010] The upper mold assembly includes an upper mold base and two side-pressure core units, which are respectively located at both ends of the upper mold base along the longitudinal direction. Each side-pressure core unit has a cutter fixed to the upper mold base, and the inner wall of the cutter has a first driving surface. Each side-pressure core unit also includes a side-pressure core and a core reset component. The side-pressure core is located inside the cutter on the same side and can reciprocate longitudinally relative to the upper mold base. The side-pressure core has a downward-facing cavity, and the side wall of the side-pressure core also has a second inclined surface. The core reset component is used to drive the side-pressure core longitudinally to its initial working position when the mold is demolded; wherein the longitudinal direction is the length direction of the part.

[0011] The lower mold assembly includes a lower mold base, with supporting punches at both ends of the lower mold base. Side-aligning wedge units are provided at both ends of the lower mold base along the longitudinal direction. Each side-aligning wedge unit includes a side-aligning wedge and a wedge reset component. The side-aligning wedge is capable of reciprocating relative to the lower mold base along the longitudinal direction. The outer side of the side-aligning wedge has a first inclined surface, and the inner side of the side-aligning wedge has a second driving surface. The wedge reset component is used to drive the side-aligning wedge to its initial installation position when the mold is demolded.

[0012] During the mold closing process of the upper mold assembly and the lower mold assembly, the first driving surface first contacts the first inclined surface to drive the side wedge to move toward the part to a first predetermined position, and then the second inclined surface abuts against the second driving surface to drive the side pressure core to move longitudinally inward. Finally, the cavity and the supporting punch cooperate to form the negative angle structure of the part.

[0013] During the separation process of the upper mold assembly and the lower mold assembly, the side pressure core is longitudinally moved outward and reset under the action of the core reset component, and the side wedge is longitudinally moved outward and reset under the action of the wedge reset component.

[0014] In this invention, the mold assembly is provided with two sets of cooperating side wedge units and side pressure core units, which can form the negative angle structure at both ends of the part along the length direction. In this way, the negative angle structure at both ends of the part can be formed in one mold closing, which simplifies the molding process and reduces the labor intensity of the operator. After molding, the side pressure core first separates from the part along the longitudinal direction, which facilitates demolding.

[0015] Optionally, the side-aligning wedge unit includes a side-aligning insert, which is detachably connected to the inner sidewall of the side-aligning wedge, and the second driving surface is disposed on the side-aligning insert.

[0016] Optionally, the side insert protrudes partially toward the surface of the part to form a mating surface for abutting against the end of the part.

[0017] Optionally, the side-pressing core unit is further provided with a core guiding assembly, which includes a first slide groove and a first slider. One of the first slide groove and the first slider is disposed on the side-pressing core, and the other is disposed on the upper mold base. The first slide groove and the first slider cooperate to guide the side-pressing core to move longitudinally.

[0018] Optionally, guide plates protrude from both sides of the longitudinally extending side pressure core, the first slider is the guide plate, and detachable pressure plates are provided at positions corresponding to the two guide plates on the upper mold base. The pressure plates and the inner sidewall of the upper mold base form the first sliding groove.

[0019] Optionally, the upper mold base has a first wall and a second wall disposed opposite to each other, the side pressure core reciprocates between the first wall and the second wall, and both the first wall and the second wall can elastically abut against the two sides of the side pressure core to constrain the maximum displacement of the side pressure core moving longitudinally to both sides.

[0020] Optionally, the outer wall of the side wedge further includes a first vertical surface connected to the lower end of the first inclined surface, and the insert further includes a second vertical surface connected to the upper end of the first driving surface. During the mold closing process, the first vertical surface and the second vertical surface can be vertically guided and engaged.

[0021] Optionally, it also includes a lower drive inserter, which is detachably connected to the outer side wall of the side wedge, wherein the first inclined surface and the first vertical surface are disposed on the lower drive inserter.

[0022] Optionally, the first driving surface is an inclined surface;

[0023] Or / and, the second driving surface is an inclined surface;

[0024] Or / and, it also includes a wedge limiting component, which is installed on the lower mold base and located outside the side wedge, for limiting the maximum outward displacement of the side wedge;

[0025] Alternatively and / or, the wedge resetting component includes a longitudinally arranged telescopic cylinder that is compressed during mold closing;

[0026] Alternatively / and, the core reset component includes a longitudinally arranged spring assembly that is stretched or compressed during mold closing;

[0027] Optionally, the side-aligning wedge unit further includes a wedge guide assembly, which includes a second slide groove and a second slider. One of the second slide groove and the second slider is disposed on the side-aligning wedge, and the other is disposed on the lower mold base. The second slide groove and the second slider cooperate to guide the side-aligning wedge to move longitudinally.

[0028] Optionally, the second slide is a V-shaped slide, and the second slider is a V-shaped guide block that cooperates with the V-shaped slide.

[0029] Optionally, each of the side pressure cores has outwardly extending limiting protrusions on both sides of its longitudinally extending sidewalls. The limiting protrusions have upwardly raised arc-shaped convex surfaces. The side straightening wedge unit also includes two guide plates fixed to the lower die base. The two guide plates are located on both sides of the supporting punch. When the side pressure core is descending, the arc-shaped convex surfaces are gradually restricted below the guide plates, and the two can slide relative to each other in the longitudinal direction.

[0030] Optionally, the limiting protrusion has opposing transverse walls, and the transverse walls are provided with the arc-shaped convex surface. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the process for side shaping of the rear floor beam of a vehicle in the prior art;

[0032] Figure 2 This is a cross-sectional view of a mold used for side shaping of a part with negative angles at both ends, according to a specific embodiment of the present invention.

[0033] Figure 3 for Figure 2 A partial schematic diagram of the mold shown;

[0034] Figure 4 A partial structural schematic diagram of a specific embodiment of the lower mold assembly provided by the present invention;

[0035] Figure 5 A partial structural schematic diagram of a specific embodiment of the upper mold component provided by the present invention;

[0036] Figure 6 for Figure 4 Schematic diagram of the structure of the lower and middle mold base;

[0037] Figure 7 for Figure 5 Schematic diagram of the upper and middle mold base;

[0038] Figure 8 for Figure 2 A schematic diagram of the structure of an assembly formed by parts that are fixed relative to and to the side wedges;

[0039] Figure 9 for Figure 8 Another direction diagram;

[0040] Figure 10 for Figure 2 A schematic diagram of the structure of the assembly formed by the parts fixed to the side pressure core;

[0041] Figure 11 for Figure 10 A diagram showing another direction.

[0042] Figures 1 to 11 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0043] 1' Rear floor crossbeam; 11' First end; 12' Second end; 2' Lower mold base; 21' First side shaping mold cavity; 22' Second side shaping mold cavity;

[0044] 100 Upper die holder; 101 Side pressure core; 1011 Cavity; 102 Upper drive inserter; 102a Inserter mounting seat; 1021 First drive surface; 1022 Second vertical surface; 103 Core guide assembly; 104 Punching punch; 105 Pressure plate; 105a Pressure plate mounting seat; 106 Limiting protrusion; 1061 Arc-shaped convex surface; 107 First elastic pad; 108 Second elastic pad; 109 Bolt; 110 Spring assembly; 110a Spring mounting seat; 111 Guide plate; 1-1 First wall; 1-2 Second wall;

[0045] 200 Lower die base; 201 Side straightening wedge; 202 Lower drive insert; 2021 First inclined surface; 203 Wedge guide assembly; 204 Side straightening insert; 205 Punching die; 206 Wedge limiting component; 206a Limiting component mounting base; 207 Pressure block; 207a Pressure block mounting base; 208 Guide plate; 209 Support punch; 210 V-shaped guide block; 211 Telescopic cylinder; 212 Block; 212a V-shaped groove; 213 Boss. Detailed Implementation

[0046] The terms "first" and "second" used in this article are used only for the convenience of describing two or more structures or components that are identical or similar in structure and / or function, and do not indicate any special limitation on order and / or importance.

[0047] The features and exemplary embodiments of various aspects of this application will now be described in detail. In order to make the purpose, technical solution and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Please refer to Figures 2 to 11 , Figure 2 This is a cross-sectional view of a mold used for side shaping of a part with negative angles at both ends, according to a specific embodiment of the present invention. Figure 3 for Figure 2 A partial schematic diagram of the mold shown; Figure 4 A partial structural schematic diagram of a specific embodiment of the lower mold assembly provided by the present invention; Figure 5 A partial structural schematic diagram of a specific embodiment of the upper mold component provided by the present invention; Figure 6 for Figure 4 Schematic diagram of the structure of the lower and middle mold base; Figure 7 for Figure 5 Schematic diagram of the upper and middle mold base; Figure 8 for Figure 2 A schematic diagram of the structure of an assembly formed by parts that are fixed relative to and to the side wedges; Figure 9 for Figure 8 Another direction diagram; Figure 10 for Figure 2 A schematic diagram of the structure of the assembly formed by the parts fixed to the side pressure core; Figure 11 for Figure 10 A diagram showing another direction.

[0049] This invention provides a mold for side-shaping parts with negative angles at both ends, comprising an upper mold assembly and a lower mold assembly. Typically, the upper mold assembly is mounted on the slide of a press and moves up and down with the slide. The lower mold assembly is fixed to the press base. The upper mold assembly moves up and down with the slide to approach or move away from the lower mold assembly, thereby achieving mold closing and demolding. In this text, the direction of the part's stamping movement is defined as perpendicular to the ground, and a negative angle refers to an angle less than 90 degrees relative to the direction of the stamping movement in the part's shape.

[0050] Specifically, the upper mold assembly includes an upper mold base 100, which serves as a connection and integrated installation unit. The upper mold base 100 can be fitted with a slider installed on the compressor. Other components of the upper mold assembly are integrated and installed on the upper mold base 100. The material of the upper mold base 100 can be reasonably selected according to the specific parts being processed, as long as it meets the usage requirements.

[0051] The upper mold assembly also includes two side-pressure core units, which are located at both ends of the upper mold base 100 along the longitudinal direction. That is, each end of the upper mold base 100 along the longitudinal direction has one side-pressure core unit. Typically, the two side-pressure core units at both ends of the upper mold base 100 are symmetrically arranged about the central cross-section of the upper mold base 100. Each side-pressure core unit has a insert fixed to the upper mold base 100; this insert is defined herein as an upper driving insert 102. The inner wall of the upper driving insert has a first driving surface 1021, which is typically an inclined surface. Correspondingly, the upper mold base 100 has an upper insert mounting seat 102a for mounting the upper driving insert 102. In this document, the side of the component facing the mold center is defined as the inner side, and the corresponding side facing away from the mold center is defined as the outer side.

[0052] The side-pressure core unit also includes a side-pressure core 101 and a core resetting component. The side-pressure core is located inside the same-side insert and can reciprocate longitudinally relative to the upper mold base 100. That is, the side-pressure core 101 can reciprocate between a first position and a second position. The first position is the longitudinal position of the side-pressure core 101 when the upper mold assembly and lower mold assembly are in a separated state; the second position is the longitudinal position of the side-pressure core when the upper mold assembly and lower mold assembly are in the final mold-closing state. This document defines the first position of the side-pressure core as the initial working position. The side-pressure core 101 can be connected to the upper mold base 100 via bolts 109 for assisted hoisting.

[0053] The side-pressure core 101 has a downward-facing cavity 1011. The specific structure of the cavity 1011 is designed according to the shape of the negative angle structure of the part, so that the cavity 1011 and the supporting punch 209 of the lower mold assembly can cooperate to form the negative angle structure. The side wall of the side-pressure core 101 also has a second inclined surface. The second inclined surface is mainly used to cooperate with the driving surface on the lower mold base 200 to drive the side-pressure core to move longitudinally. The angle and size of the second inclined surface of the side-pressure core 101 are related to factors such as the longitudinal distance of the side-pressure core 101, the descent height of the side-pressure core 101, and the driving surface that cooperates with the second inclined surface to drive it.

[0054] In this invention, the core resetting component is used to drive the side-pressure core 101 to move longitudinally to the initial working position when the mold is demolded; wherein, longitudinal in this invention refers to the length direction of the part, that is, along... Figure 2 The left and right directions in the middle.

[0055] The lower die assembly in this invention includes a lower die base 200, which primarily serves for installation, connection, and component integration. The lower die base 200 is fixedly mounted on the base of a press, and other components are integrated and mounted on it. Supporting punches 209 are provided at both ends of the lower die base 200. These supporting punches 209 cooperate with the cavity 1011 of the side pressure core 101 to form a negative angle structure. During forming, the end of the part is supported by the supporting punches. Of course, in addition to providing supporting punches at the position for forming the negative angle structure, a support platform can also be provided between the two supporting punches 209. Besides supporting the part, other structures can be provided on the support platform, such as a punching die fixed thereon, which cooperates with the stamping punch on the upper die assembly to achieve punching at that position on the part.

[0056] The lower mold base 200 of the present invention is provided with side-aligning wedge units at both ends along the longitudinal direction. That is, side-aligning wedge units are provided at both the left and right ends of the lower mold base 200. Typically, the side-aligning wedge units at both ends are symmetrical about the central cross-section of the mold assembly. Each side-aligning wedge unit includes a side-aligning wedge 201 and a wedge resetting component. The side-aligning wedge can reciprocate relative to the lower mold base 200 along the longitudinal direction. That is, the side-aligning wedge can reciprocate between a first predetermined position and a second predetermined position of the lower mold base 200. The second predetermined position is defined herein as the initial installation position. The outer side of the side-aligning wedge has a first inclined surface. The first inclined surface is mainly used to cooperate with the first driving surface of the inserter of the upper mold assembly. When the upper mold assembly descends, the first driving surface of the inserter contacts the first inclined surface to realize the side-aligning wedge moving to the right along the longitudinal direction.

[0057] The side-aligning wedge can be a single integrated structure, with the first inclined surface directly mounted on it. Alternatively, a separate lower drive inserter can be provided, fixedly connected to the side-aligning wedge, with the first inclined surface positioned on the lower drive inserter. This allows the side-aligning wedge and the lower drive inserter 202 to be machined separately, using different materials, thus reducing processing costs and forming costs.

[0058] The inner side of the side-aligning wedge of the present invention has a second driving surface, and the wedge reset component is used to drive the side-aligning wedge to move to the initial installation position when the mold is demolded.

[0059] In one specific example, the outer wall of the side wedge 201 also includes a first vertical surface 2022 connected to the lower end of the first inclined surface 2021, and the upper drive insert also includes a second vertical surface 1022 connected to the upper end of the first drive surface. During the mold closing process, the first vertical surface and the second vertical surface 1022 can be vertically guided and engaged.

[0060] During the mold closing process of the upper and lower mold assemblies, the first driving surface first contacts the first inclined surface to drive the side wedge to move toward the part to a first predetermined position. Then, the second inclined surface abuts against the second driving surface to drive the side pressure core to move longitudinally inward. Finally, the cavity and the supporting punch cooperate to form the negative angle structure of the part. That is, when the upper mold base 100 descends to the first height, the first driving surface and the first inclined surface contact each other. As the upper mold base 100 continues to descend to the second height, the side wedge moves inward to the first predetermined position with the cooperation of the first driving surface and the first inclined surface. As the upper mold base 100 continues to descend from the second height to the mold closing position height, the side wedge position remains unchanged. The second inclined surface abuts against the second driving surface and drives the side pressure core to move inward. At the mold closing position height, the cavity of the side pressure core and the supporting punch cooperate to form the negative angle structure at the end of the part.

[0061] During the separation process of the upper mold assembly and the lower mold assembly, the side-pressed core moves longitudinally outward and resets under the action of the core reset component, and the side-aligned wedge moves longitudinally outward and resets under the action of the wedge reset component. Specifically, when the upper mold base 100 moves upward from the mold closing position away from the lower mold base 200, the movement of the side-pressed core and the side-aligned wedge is opposite to the above-mentioned mold closing movement. First, the side-pressed core moves longitudinally outward under the action of the core reset component to separate from the part, and then the side-aligned wedge is also reset to the initial installation position under the push of the wedge reset component.

[0062] In this invention, the mold assembly is provided with two sets of cooperating side wedge units and side pressure core units, which can form the negative angle structure at both ends of the part along the length direction. In this way, the negative angle structure at both ends of the part can be formed in one mold closing, which simplifies the molding process and reduces the labor intensity of the operator. After molding, the side pressure core first separates from the part along the longitudinal direction, which facilitates demolding.

[0063] In this invention, the side-aligning wedge unit includes a side-aligning insert 204, which is detachably connected to the inner sidewall of the side-aligning wedge. A second driving surface is disposed on the side-aligning insert. The side-aligning insert and the side-aligning wedge can be made of different materials and have different machining precision, which can reduce the machining cost of the side-aligning wedge.

[0064] In one specific example, the side-aligning insert partially protrudes towards the surface of the part to form a mating surface for abutting against the end of the part. In this example, only the mating surface can be finished, which can further reduce the machining cost of the side-aligning insert 204.

[0065] In one specific example, the side-pressing core unit is further provided with a core guide assembly 103. The core guide assembly 103 includes a first groove and a first slider. One of the first groove and the first slider is disposed on the side-pressing core, and the other is disposed on the upper mold base 100. The first groove and the first slider cooperate to guide the side-pressing core to move longitudinally. The attached figure shows a specific example of the side-pressing core being provided with a first slider and the upper mold base 100 being provided with a first groove. Of course, it is also possible for the side-pressing core to be provided with a first groove and the upper mold base 100 to be provided with a first slider.

[0066] In the above example, the side-pressure core moves longitudinally under the cooperation and sliding of the first slide groove and the first slider, improving the flexibility of the longitudinal movement of the side-pressure core.

[0067] Specifically, guide plates 111 protrude from both sides of the longitudinally extending side pressure core. The first slider is the guide plate 111. Removable pressure plates 105 are provided at positions corresponding to the two guide plates 111 on the upper mold base 100. Correspondingly, a pressure plate mounting seat 105a is provided on the upper mold base 100. The pressure plate 105 can be detachably connected to the pressure plate mounting seat 105a by bolts. The pressure plate 105 and the inner sidewall of the upper mold base 100 form a first sliding groove.

[0068] The pressure plate is detachably connected to the upper mold base 100, which facilitates the installation and removal of the side pressure core and improves the flexibility of the mechanism.

[0069] In the above embodiments, the upper mold base 100 has a first wall 1-1 and a second wall 1-2 disposed opposite to each other. The side pressure core reciprocates between the first wall 1-1 and the second wall 1-2, and both the first wall 1-1 and the second wall 1-2 can elastically abut against the two sides of the side pressure core to constrain the maximum displacement of the side pressure core moving longitudinally to both sides. The elastic abutment between the side pressure core and the left and right first wall 1-1 and second wall 1-2 can be achieved by setting elastic pads or springs between the two, such as rubber pads or cylindrical springs. Figure 10 and 11 As shown, the two end walls of the side pressure core 101 are respectively provided with a first elastic pad 107 and a second elastic pad 108.

[0070] By limiting the left and right movement limits of the side pressure core, the precision of the mechanism's movements can be improved, and the elastic resistance acts as a buffer, reducing the impact force between the two parts and reducing wear.

[0071] In the above embodiments, the first driving surface can be an inclined plane, and the second driving surface can also be an inclined plane; using an inclined plane as the driving longitudinal motion simplifies the structure. The inclination angle and position of the inclined plane can be determined according to the specific product, and will not be specifically described herein without hindering those skilled in the art from understanding and implementing the above technical solutions.

[0072] Of course, the mold in this invention also includes a wedge limiting component 206, which is installed on the lower mold base 200 and located on the outside of the side wedge, for limiting the maximum outward displacement of the side wedge. The wedge limiting component 206 can be an elastic pad or a cylinder, etc. Accordingly, the lower mold base 200 is provided with a limiting component mounting seat 206a for mounting the wedge limiting component 206.

[0073] The wedge reset component in the above embodiments includes a longitudinally arranged telescopic cylinder 211, which is compressed during mold closing. The telescopic cylinder can be a pneumatic cylinder or a hydraulic cylinder. The telescopic cylinder 211 can provide a large reset force.

[0074] Of course, the wedge reset component 211 can also be a spring-type component. This type of component has a corresponding speed block and is relatively simple to set up, and occupies less space.

[0075] In one specific example, the core reset component includes a longitudinally arranged spring assembly 110, which is stretched or compressed during mold closing. Correspondingly, a spring assembly mounting seat 110a is provided on the upper mold base 100 for mounting the spring assembly 110. The spring assembly is a component including a spring; the number of spring assemblies can be one set, two sets, or more. Corresponding speed blocks are provided for the spring assemblies, and the structure is relatively simple and occupies a small space.

[0076] Similarly, the core reset component can also be other components that can provide reset power, such as cylinders.

[0077] In the above embodiments, the side-aligning wedge unit further includes a wedge guide assembly 203. The wedge guide assembly 203 includes a second slide groove and a second slider. One of the second slide groove and the second slider is disposed on the side-aligning wedge, and the other is disposed on the lower mold base 200. The second slide groove and the second slider cooperate to guide the side-aligning wedge to move longitudinally.

[0078] The second slide is a V-shaped slide, and the second slider is a V-shaped guide block that cooperates with the V-shaped slide. As shown in the figure, a block 212 is provided at the bottom of the side wedge, a V-shaped slide 212a is provided on the block 212, and a V-shaped guide block 210 is provided on the lower mold base 200.

[0079] Of course, the wedge guide assembly also includes bosses 213 disposed on the two side walls of the longitudinal extension of the wedge, and the wedge guide assembly also includes pressure blocks 207 located on both sides of the wedge. The pressure blocks 207 can be detachably connected to the pressure block mounting base 207a of the lower mold base 200, and a groove can be formed between the pressure blocks 207 and the lower mold base 200. The bosses 213 are limited to the inside of the corresponding side grooves.

[0080] In the above embodiments, each side pressure core has outwardly extending limiting protrusions 106 on both sides of its longitudinally extending side walls. The limiting protrusions 106 have upwardly raised arc-shaped convex surfaces 1061. The side straightening wedge unit also includes two guide plates 208 fixed to the lower mold base 200. The two guide plates 208 are located on both sides of the supporting punch 209. When the side pressure core is descending, the arc-shaped convex surfaces 1061 are gradually restricted below the guide plates 208 and the two can slide relative to each other in the longitudinal direction.

[0081] In this embodiment, during the longitudinal inward movement of the side pressure core, the limiting protrusions on both sides can be inserted below the guide plate 208. The abutment between the arc-shaped convex surface 1061 and the guide plate 208 can generate a downward force on the side pressure core, which is conducive to bringing the side pressure core and the supporting punch as close as possible and improving the forming quality of the negative angle structure.

[0082] In one specific example, the limiting protrusion 106 has opposing transverse walls with arcuate convex surfaces.

[0083] Of course, in addition to side-shaping parts, the mold of this invention can also have functions such as punching and flanging, as long as a suitable mold is installed on the upper mold base 100 and the lower mold base 200. Figure 3 As can be seen, a stamping punch 104 is fixed on the upper die holder 100, and a stamping die 205 is fixed on the lower die holder 200. The stamping punch 104 and the stamping die 205 can cooperate to punch holes at corresponding positions on the parts.

[0084] The foregoing has provided a detailed description of the mold for side shaping of parts with negative angles at both ends, as provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A mold for side shaping of parts with negative angles at both ends, characterized in that, Includes the following components: The upper mold assembly includes an upper mold base and two side-pressure core units, which are respectively located at both ends of the upper mold base along the longitudinal direction. Each side-pressure core unit has a cutter fixed to the upper mold base, and the inner sidewall of the cutter has a first driving surface. The side-pressure core unit also includes a side-pressure core and a core reset component. The side-pressure core is located inside the cutter on the same side and can reciprocate relative to the upper mold base along the longitudinal direction. The side-pressure core has a cavity with a downward opening, and the sidewall of the side-pressure core also has a second inclined surface. The core reset component is used to drive the side-pressure core to move longitudinally to an initial working position when the mold is demolded. The longitudinal direction is the length direction of the part. The lower mold assembly includes a lower mold base, with supporting punches at both ends of the lower mold base. Side-aligning wedge units are provided at both ends of the lower mold base along the longitudinal direction. Each side-aligning wedge unit includes a side-aligning wedge and a wedge reset component. The side-aligning wedge is capable of reciprocating relative to the lower mold base along the longitudinal direction. The outer side of the side-aligning wedge has a first inclined surface, and the inner side of the side-aligning wedge has a second driving surface. The wedge reset component is used to drive the side-aligning wedge to its initial installation position when the mold is demolded. During the mold closing process of the upper mold assembly and the lower mold assembly, the first driving surface first contacts the first inclined surface to drive the side wedge to move toward the part to a first predetermined position, and then the second inclined surface abuts against the second driving surface to drive the side pressure core to move longitudinally inward. Finally, the cavity and the supporting punch cooperate to form the negative angle structure of the part. During the separation process of the upper mold assembly and the lower mold assembly, the side pressure core is longitudinally moved outward and reset under the action of the core reset component, and the side wedge is longitudinally moved outward and reset under the action of the wedge reset component.

2. The mold for side shaping of parts with negative angles at both ends as described in claim 1, characterized in that, The side-aligning wedge unit includes a side-aligning insert, which is detachably connected to the inner sidewall of the side-aligning wedge, and the second driving surface is disposed on the side-aligning insert.

3. The mold for side shaping of parts with negative angles at both ends as described in claim 2, characterized in that, The side insert protrudes partially toward the surface of the part to form a mating surface for abutting against the end of the part.

4. The mold for side shaping of parts with negative angles at both ends as described in claim 2, characterized in that, The side-pressure core unit is further provided with a core guide assembly, which includes a first slide groove and a first slider. One of the first slide groove and the first slider is disposed on the side-pressure core, and the other is disposed on the upper mold base. The first slide groove and the first slider cooperate to guide the side-pressure core to move longitudinally.

5. The mold for side shaping of parts with negative angles at both ends as described in claim 4, characterized in that, The side pressure core has guide plates protruding from both sides of its longitudinally extending sidewalls. The first slider is the guide plate. The upper mold base is provided with detachable pressure plates at positions corresponding to the two guide plates. The pressure plates and the inner sidewall of the upper mold base form the first groove.

6. The mold for side shaping of parts with negative angles at both ends as described in claim 1, characterized in that, The upper mold base has a first wall and a second wall arranged opposite to each other. The side pressure core reciprocates between the first wall and the second wall, and both the first wall and the second wall can elastically abut against the two sides of the side pressure core to constrain the maximum displacement of the side pressure core moving longitudinally to both sides.

7. The mold for side shaping of parts with negative angles at both ends as described in claim 1, characterized in that, The outer wall of the side wedge also includes a first vertical surface connected to the lower end of the first inclined surface, and the insert also includes a second vertical surface connected to the upper end of the first driving surface. During the mold closing process, the first vertical surface and the second vertical surface can be vertically guided and engaged.

8. The mold for side shaping of parts with negative angles at both ends as described in claim 7, characterized in that, It also includes a lower drive inserter, which is detachably connected to the outer side wall of the side wedge, and the first inclined surface and the first vertical surface are disposed on the lower drive inserter.

9. The mold for side shaping of parts with negative angles at both ends as described in claim 1, characterized in that, The first driving surface is an inclined plane; Or / and, the second driving surface is an inclined surface; Or / and, it also includes a wedge limiting component, which is installed on the lower mold base and located outside the side wedge, for limiting the maximum outward displacement of the side wedge; Alternatively and / or, the wedge resetting component includes a longitudinally arranged telescopic cylinder that is compressed during mold closing; Alternatively / and, the core reset component includes a longitudinally arranged spring assembly that is stretched or compressed during mold closing.

10. The mold for side shaping of parts with negative angles at both ends as described in claim 1, characterized in that, The side-aligning wedge unit further includes a wedge guide assembly, which includes a second slide groove and a second slider. One of the second slide groove and the second slider is disposed on the side-aligning wedge, and the other is disposed on the lower mold base. The second slide groove and the second slider cooperate to guide the side-aligning wedge to move longitudinally.

11. The mold for side shaping of parts with negative angles at both ends as described in claim 10, characterized in that, The second slide is a V-shaped slide, and the second slider is a V-shaped guide block that cooperates with the V-shaped slide.

12. The mold for side shaping of parts with negative angle structures at both ends, as described in any one of claims 1 to 11, is characterized in that... Each of the side pressure cores has outwardly extending limiting protrusions on both sides of its longitudinally extending sidewalls. The limiting protrusions have upwardly raised arc-shaped convex surfaces. The side straightening wedge unit also includes two guide plates fixed to the lower die base. The two guide plates are located on both sides of the supporting punch. When the side pressure core is descending, the arc-shaped convex surfaces are gradually restricted below the guide plates, and the two can slide relative to each other in the longitudinal direction.

13. The mold for side shaping of parts with negative angles at both ends as described in claim 12, characterized in that, The limiting protrusion has opposing horizontal walls, and the horizontal walls are provided with the arc-shaped convex surface.

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