Loader cab bearing rib profiling die

Abstract

The utility model discloses a loading machine cab bearing rib profiling die. The loading machine cab bearing rib profiling die comprises an upper die assembly, a lower die assembly and a guide assembly. The upper die assembly comprises an upper die mounting plate and a male die, and a die pressing groove is formed in the lower end of the male die. The lower die assembly comprises a lower die mounting plate, a female die and an ejector, the female die is composed of a pair of female die inserts, the upper end faces of the two female die inserts are both provided with forming positioning faces, the ejector is vertically and movably mounted on the lower die mounting plate and located between the two female die inserts, and the ejector is vertically aligned with the pressing die groove; the guide assembly comprises a guide column, a guide hole is formed in the upper die mounting plate, and the guide column is matched with the guide hole. One-time forming machining of the bearing rib is achieved, the problem of dimensional deviation caused by multiple times of bending in a traditional technology is solved, the dimensional precision is high, the production quality stability is effectively improved, the feedback rate of subsequent procedures is reduced, the production efficiency is remarkably improved, and meanwhile the stress concentration situation in the bearing rib can be reduced through one-time pressing forming.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery pressing and forming mold technology, and in particular to a pressing mold for the load-bearing ribs of a loader cab. Background Technology

[0002] The load-bearing ribs of a loader cab are a crucial component for preventing rollovers and falling objects, and their structural strength directly impacts the safety of the occupants. Traditional loader cab components extensively utilize bending processes. For example, some loader cab load-bearing ribs have four bends, with the U-shaped groove being 1.6 times its width in height. The additional bends on both sides create irregular structures, making bending difficult. Traditional processes include cutting, bending, cutting head preparation, grinding, and shaping. These procedures are complex, and the tempering of the steel plate after heating affects its original properties, easily leading to stress concentration and a significant decrease in strength. Furthermore, parts produced through bending processes exhibit large dimensional accuracy deviations, poor quality stability, and high feedback rates from subsequent processes, failing to meet the demands of high-efficiency production, resulting in extended production cycles and reduced enterprise productivity. Summary of the Invention

[0003] In view of this, the present invention provides a pressing mold for the load-bearing ribs of a loader cab, which has the advantages of improving the dimensional accuracy of parts, enhancing structural strength and stability, and simplifying the processing procedures.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A loader cab load-bearing rib forming mold includes: an upper mold assembly, a lower mold assembly, and a guide assembly.

[0006] The upper mold assembly includes an upper mold mounting plate and a punch. The punch is mounted on the lower end face of the upper mold mounting plate, and a pressing groove is provided at the lower end of the punch. The lower mold assembly includes a lower mold mounting plate, a die, and an ejector. The die consists of a pair of die inserts, which are symmetrically spaced apart and mounted on the lower mold mounting plate. The upper end face of each die insert is provided with a forming positioning surface. The ejector is movably mounted on the lower mold mounting plate and located between the two die inserts. The ejector is vertically aligned with the pressing groove. The guide assembly includes a guide post, which is mounted on the lower mold mounting plate. A guide hole is provided on the upper mold mounting plate, and the guide post mates with the guide hole.

[0007] Preferably, the lower mold mounting plate is provided with multiple mounting holes arranged in an array. The die insert is mounted on the lower mold mounting plate by bolts engaging with the mounting holes. The spacing between the die inserts can be adjusted by adjusting the mounting position of the die inserts.

[0008] Preferably, the ejector is mounted on the lower mold mounting plate by an ejector spring and an ejector screw.

[0009] Preferably, multiple sets of the ejector spring and the ejector screw are arranged at intervals on the lower mold mounting plate, and multiple mating holes are provided at intervals on the lower end surface of the ejector, with each of the multiple mating holes corresponding to one of the multiple ejector screws.

[0010] Preferably, the molding groove is a trapezoidal groove, the ejector is a trapezoidal ejector, and the forming positioning surface is a triangular positioning surface.

[0011] Preferably, the guide assembly further includes a guide sleeve, which is installed on the lower end face of the upper mold mounting plate and located at the guide hole, and the guide sleeve is sleeved on the guide post.

[0012] Preferably, the guide assembly further includes a guide post spring, which is sleeved on the guide post and its lower end is mounted on the lower mold mounting plate, and the upper end of the guide post spring abuts against the guide sleeve.

[0013] Preferably, an upper mold pressing plate is installed on the upper end surface of the upper mold mounting plate, and multiple upper mold pressing plates are provided, which are spaced apart, and each upper mold pressing plate is provided with a connection hole.

[0014] Preferably, a lower mold pad is installed on the lower end surface of the lower mold mounting plate, and multiple lower mold pads are provided, with the multiple lower mold pads spaced apart.

[0015] Preferably, both the upper mold mounting plate and the lower mold mounting plate have multiple lifting lugs symmetrically arranged on their sides.

[0016] The beneficial effects of this utility model are as follows: Compared with the prior art, the loader cab load-bearing rib forming mold disclosed in this application realizes the one-time forming of the load-bearing rib, solves the problem of dimensional deviation caused by multiple bending in the traditional process, has high dimensional accuracy, simplifies the production process, effectively improves the stability of production quality, reduces the feedback rate of subsequent processes, and significantly improves production efficiency. At the same time, one-time pressing can also reduce the stress concentration inside the load-bearing rib and improve the overall strength of the load-bearing rib.

[0017] Additional aspects and advantages of this 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. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram (first-person view) of the load-bearing rib forming mold of this utility model;

[0019] Figure 2 This is a structural schematic diagram (second perspective) of the load-bearing rib pressing mold of this utility model;

[0020] Figure 3 This is a structural schematic diagram (third-person perspective) of the load-bearing rib pressing mold of this utility model;

[0021] Figure 4 yes Figure 3 A magnified view of region A in the middle.

[0022] Figure label:

[0023] 1. Upper mold assembly; 11. Upper mold mounting plate; 12. Punch; 13. Upper mold pressure plate; 111. Guide hole; 121. Pressing groove;

[0024] 2. Lower mold assembly; 21. Lower mold mounting plate; 22. Die; 23. Ejector; 24. Lower mold backing plate; 221. Forming positioning surface;

[0025] 3. Guide assembly; 31. Guide post; 32. Guide sleeve; 33. Guide post spring;

[0026] 4. Lifting lug; 5. Top spring; 6. Top screw. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The following is for reference. Figures 1 to 4 This invention describes the pressing mold for the load-bearing ribs of the loader cab in an embodiment of the present invention.

[0030] This application discloses a loader cab load-bearing rib forming mold, including: an upper mold assembly 1, a lower mold assembly 2, and a guide assembly 3.

[0031] The upper mold assembly 1 includes an upper mold mounting plate 11 and a punch 12. The punch 12 is mounted on the lower end face of the upper mold mounting plate 11, and a pressing groove 121 is provided at the lower end of the punch 12. The lower mold assembly 2 includes a lower mold mounting plate 21, a die 22, and an ejector 23. The die 22 is composed of a pair of die inserts, which are symmetrically spaced apart and mounted on the lower mold mounting plate 21. The upper end face of each die insert is provided with a forming positioning surface 221. The ejector 23 is movably mounted on the lower mold mounting plate 21 and located between the two die inserts. The ejector 23 is vertically aligned with the pressing groove 121. The guide assembly 3 includes a guide post 31, which is mounted on the lower mold mounting plate 21. A guide hole 111 is provided on the upper mold mounting plate 11, and the guide post 31 cooperates with the guide hole 111.

[0032] The upper mold assembly 1 refers to the upper pressing structure formed by the mounting plate and the punch 12. The die insert is a split-design molding module used to support the sheet metal workpiece and assist in the pressing and forming of the workpiece. The punch 12 and the die insert can be fixedly connected by bolts, studs, etc., to achieve modular assembly. The ejector 23 is an ejection device located in the gap of the die 22. The guide assembly 3 is a guiding mechanism that controls the alignment of the mold.

[0033] In existing technologies, the traditional manufacturing of load-bearing ribs for loader cabs employs a bending process, requiring multiple cutting, bending, and shaping steps. This process suffers from the problem of material performance degradation due to heat tempering at the bending points, and is prone to stress concentration at irregularly shaped structures. Multiple processing steps result in dimensional deviations in parts, insufficient quality stability, and the need for repeated corrections in subsequent processes, thus extending the production cycle.

[0034] The loader cab load-bearing rib forming mold proposed in this application, under the action of a press, forms a pressing space between the pressing groove 121 of the punch 12 and the forming positioning surface 221 of the die insert. The sheet metal is placed on the forming positioning surface 221 on the die insert, and the forming positioning surface 221 achieves initial positioning. During the pressing process, the guide post 31 moves axially along the guide hole 111 to ensure precise matching between the punch 12 and the die 22 and to ensure positional accuracy during the pressing process, so that the angle and size of the part meet the design requirements. After pressing is completed, the ejector 23 ejects the workpiece under the action of a spring, avoiding deformation caused by mold adsorption.

[0035] Compared with the prior art, this application realizes the one-time forming of load-bearing reinforcement, which solves the problem of dimensional deviation caused by multiple bending in traditional processes. It has high dimensional accuracy, simplifies the production process, effectively improves the stability of production quality, reduces the feedback rate of subsequent processes, and significantly improves production efficiency. At the same time, one-time pressing can also reduce the stress concentration inside the load-bearing reinforcement and improve the overall strength of the load-bearing reinforcement.

[0036] In some embodiments, for example Figure 1and Figure 2 As shown, the lower mold mounting plate 21 is provided with multiple mounting holes, which are arranged in an array. The die inserts are installed on the lower mold mounting plate 21 by bolts and mounting holes. By adjusting the installation position of the die inserts, the spacing between the die inserts can be adjusted to meet the processing requirements of load-bearing ribs of different widths.

[0037] Specifically, the connecting structure at the bottom of the die insert forms an adjustable mechanical connection with the mounting holes of the lower die mounting plate 21. When it is necessary to change the spacing between the two die inserts, the fixing bolts are released from their original mounting hole positions, and the die inserts are moved along the row and column direction of the array holes to the target hole position and then tightened again. During this adjustment process, the translation distance of the die inserts is constrained by an integer multiple of the mounting hole spacing, ensuring that the spacing adjustment accuracy is controllable. The change in the spacing of the die inserts directly determines the width parameters of the pressing and forming structure, enabling the same mold to adapt to processing products of multiple specifications.

[0038] In some embodiments, for example Figure 4 As shown, the ejector 23 is mounted on the lower mold mounting plate 21 via an ejector spring 5 and an ejector screw 6. The ejector spring 5 provides axial elastic support force and, through preload setting, enables the ejector 23 to elastically reset, absorbing impact energy during pressing and ensuring smooth ejection. The ejector screw 6 serves as a guide and limiter.

[0039] Specifically, during the pressing process, the ejector spring 5 is compressed by the downward pressure of the punch 12, causing the ejector 23 to move downwards to complete the forming action. After pressing, the ejector spring 5 pushes the ejector 23 upwards to reset through elastic restoring force, smoothly ejecting the formed part from between the die inserts. The ejector screw 6 and the lower die mounting plate 21 are connected by threads to form a height-adjustable limiting structure. During the mold assembly stage, the initial position of the ejector 23 is adjusted by rotating the screw to ensure that the upper end face of the ejector 23 maintains a preset distance from the forming positioning surface 221 of the die insert. At the same time, the ejector screw 6 provides vertical guiding constraint for the ejector 23 during the ejection process, preventing the ejector 23 from shifting laterally.

[0040] In some embodiments, for example Figure 4 As shown, multiple sets of ejector springs 5 ​​and ejector screws 6 are arranged at intervals on the lower mold mounting plate 21. Multiple mating holes are provided at intervals on the lower end face of the ejector 23, and the multiple mating holes correspond one-to-one with the multiple ejector screws 6.

[0041] Specifically, during the ejection process, the ejector 23 moves upward under the elastic thrust of the ejector springs 5. Multiple sets of spaced ejector springs 5 ​​transmit a uniformly distributed force to the bottom surface of the ejector 23 through the ejector screws 6, preventing the ejector 23 from tilting to one side due to single-point force application. The ejector screws 6 pass through the mating holes to form a vertical guide constraint, allowing the ejector 23 to move only along the screw axis. The multi-point guide structure formed by multiple sets of screws and corresponding mating holes effectively restricts the horizontal degree of freedom of the ejector 23, ensuring the motion stability of the ejection mechanism.

[0042] Furthermore, the punch 12, die 22, and ejector 23 are all detachably mounted on their respective mounting plates. Therefore, by replacing the punch and die 22 and ejector 23 with different sizes, the pressing of parts of different sizes and angles can be satisfied.

[0043] In some embodiments, for example Figure 1 and Figure 2 As shown, the molding groove 121 is a trapezoidal groove, the ejector 23 is a trapezoidal ejector 23, and the forming positioning surface 221 is a triangular positioning surface.

[0044] Specifically, when the inclined surface of the trapezoidal groove contacts the sheet metal, it forms a progressive deformation path. The metal flow is guided by the inclined surfaces on both sides and extends evenly, avoiding sudden stress changes at the bend. During the ejection process, the symmetrical inclined surface of the trapezoidal ejector 23 completely fits the inner wall of the formed part, eliminating the risk of deformation caused by unilateral ejection torque. The triangular positioning surface ensures initial positioning accuracy, the trapezoidal groove controls the forming trajectory, and the trapezoidal ejector 23 maintains demolding stability. According to the above design, positioning deviations during sheet metal pressing can be effectively eliminated, the strength reduction of parts caused by stress concentration during forming can be avoided, the contour accuracy of the load-bearing rib bends can be ensured, and the assembly fit between the formed parts and the cab structure can be improved.

[0045] In some embodiments, for example Figure 1 and Figure 2 As shown, the guide assembly 3 also includes a guide sleeve 32, which is installed on the lower end face of the upper mold mounting plate 11 and located at the guide hole 111. The guide sleeve 32 is sleeved on the guide post 31.

[0046] Specifically, during the downward pressing of the upper die assembly 1 driven by the press, the guide post 31 slides axially along the inner hole of the guide sleeve 32. The inner wall of the guide sleeve 32 forms continuous contact with the outer surface of the guide post 31, limiting the radial displacement of the guide post 31. Due to the cooperation between the guide sleeve 32 and the guide post 31, the lateral displacement between the upper die assembly 1 and the lower die assembly 2 is effectively constrained, ensuring that the forming surfaces of the punch 12 and the die 22 remain aligned during the mold closing process. The fixed position of the guide sleeve 32 is located on the lower end face of the upper die mounting plate 11, so that the guide sleeve 32 contacts the guide post 31 first when the mold closes, correcting the movement trajectory of the upper die assembly 1 in advance and avoiding tilting problems caused by uneven weight distribution of the mold. When the mold is subjected to lateral force, the rigid cooperation structure between the guide sleeve 32 and the guide post 31 can disperse stress, prevent plastic deformation of the guide assembly 3, reduce the vibration of the mold during high-speed stamping, and avoid instantaneous positional displacement caused by impact, thereby improving the finished product qualification rate and extending the service life of the mold.

[0047] In some embodiments, for example Figure 1 and Figure 2 As shown, the guide assembly 3 also includes a guide post spring 33, which is sleeved on the guide post 31 and its lower end is mounted on the lower mold mounting plate 21. The upper end of the guide post spring 33 abuts against the guide sleeve 32.

[0048] Specifically, when the upper mold assembly 1 moves downward, the guide sleeve 32 slides axially along the guide post 31, and the guide post spring 33 is compressed, generating a reaction force. This reaction force is transmitted to the upper mold mounting plate 11 through the guide sleeve 32, forming a dynamic buffering effect. Before the mold is fully closed, the pre-compression of the spring generates a continuous thrust, ensuring uniform contact between the inner wall of the guide sleeve 32 and the outer surface of the guide post 31. When the mold is subjected to eccentric loads, the elastic deformation of the spring can compensate for the slight axial deviation between the guide post 31 and the guide sleeve 32, avoiding jamming caused by rigid contact. During the mold opening process, the restoring force of the spring assists in the separation of the guide sleeve 32 and the guide post 31, reducing wear on the sliding surface.

[0049] The above design effectively reduces rigid impact during mold closing, decreases the wear rate of guide components, and extends mold life. Simultaneously, it ensures precise alignment of the punch 12 and die 22 during pressing, improving the dimensional consistency of the molded parts. This buffer structure also absorbs vibration energy during press operation, enhancing mold stability.

[0050] In some embodiments, for example Figure 1 and Figure 2As shown, an upper mold pressure plate 13 is mounted on the upper surface of the upper mold mounting plate 11. Multiple upper mold pressure plates 13 are provided, spaced apart, and each upper mold pressure plate 13 has a connecting hole. The upper mold pressure plate 13 is a connecting component used to fix the upper mold assembly 1 to the press. Specifically, it can be implemented using a steel plate structure with connecting holes. Bolts pass through the connecting holes to achieve a mechanical connection with the press slide, thus distributing the load.

[0051] Specifically, multiple spaced upper mold pressure plates 13 form multiple independent load transmission paths. When the press slide applies pressure, each pressure plate bears a local load and transmits the force to the entire upper mold mounting plate 11 through the connecting holes. This multi-point distributed support structure effectively avoids the bending and deformation problem of the mounting plate caused by the concentrated force on a traditional single pressure plate. At the same time, the independently set connecting holes of each pressure plate allow for flexible adjustment of the mounting point according to the press interface position, ensuring connection reliability while taking into account installation adaptability. The spaced arrangement further optimizes the pressure distribution, making the mold more uniformly stressed.

[0052] Furthermore, the connecting holes can also be used to install new upper die plates 13. For example, if the thickness of a single upper die plate 13 cannot meet the requirements of the current press, a new upper die plate 13 can be added to the existing upper die plate 13 to adapt to the requirements of the press. The newly added upper die plate 13 can be installed on the existing upper die plate 13 through the connecting holes.

[0053] In some embodiments, for example Figure 3 As shown, a lower mold pad 24 is installed on the lower end surface of the lower mold mounting plate 21. Multiple lower mold pads 24 are provided and spaced apart. The lower mold pads 24 are installed at the bottom of the lower mold mounting plate 21 as a support structure to distribute the load. Specifically, they can be made of rectangular steel plates or metal blocks with positioning holes.

[0054] Specifically, multiple lower die pads 24 are fixed to the bottom of the lower die mounting plate 21 by bolts, and each lower die pad 24 forms a local contact area with the press worktable. During the forming process, the load borne by the die is transferred to the press table through the lower die pads 24. The multiple contact points arranged at intervals make the load distribution more uniform, avoiding bending deformation of the lower die mounting plate 21 due to overload of a single support area. At the same time, the interval between the pads provides clearance for the movement path of the ejector 23 and the installation position of the guide assembly 3, ensuring the normal operation of the internal functional components of the die.

[0055] In some embodiments, for example Figures 1 to 3As shown, multiple lifting lugs 4 are symmetrically arranged on the sides of both the upper mold mounting plate 11 and the lower mold mounting plate 21. The lifting lugs 4 are metal ring-shaped structures installed on the side of the mold, which can be fixed to the side of the mounting plate by welding or bolting. Their function is to provide a reliable force connection point for mold handling and installation.

[0056] Specifically, when the mold needs to be hoisted, transferred, or installed on the press, the hooks of the external hoisting equipment simultaneously connect to multiple lifting lugs 4 on the sides of the upper mold mounting plate 11 and the lower mold mounting plate 21. The symmetrically distributed lifting lugs 4 ensure that the tensile force on each lug 4 is equal during vertical lifting, thus maintaining the overall balance of the mold. During handling, the symmetrical layout of the multiple lifting lugs 4 disperses the concentrated stress of the hoisting load on local areas of the mounting plate, preventing deformation of the mounting plate or breakage of the lifting lugs 4 due to unilateral hoisting. Furthermore, the side lifting lugs 4 are spatially separated from the working area of ​​the mold, preventing interference with core components such as the punch 12 and die 22 during hoisting operations, while also facilitating quick hook positioning by operators.

[0057] Other components and operations of the loader cab load-bearing rib forming mold according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A loader cab stringer press mold, characterized by, include: Upper mold assembly, lower mold assembly, and guide assembly; The upper mold assembly includes an upper mold mounting plate and a punch. The punch is mounted on the lower end face of the upper mold mounting plate, and a pressing groove is provided at the lower end of the punch. The lower mold assembly includes a lower mold mounting plate, a die cavity, and an ejector. The die cavity is composed of a pair of die cavity inserts, which are symmetrically spaced apart and mounted on the lower mold mounting plate. The upper end face of each die cavity insert is provided with a forming positioning surface. The ejector is movably mounted on the lower mold mounting plate and located between the two die cavity inserts. The ejector is vertically aligned with the pressure groove. The guiding component includes a guide post, which is mounted on the lower mold mounting plate. The upper mold mounting plate is provided with a guide hole, and the guide post cooperates with the guide hole.

2. The loader cab stringer die of claim 1, wherein, The lower mold mounting plate is provided with multiple mounting holes, which are arranged in an array. The die inserts are mounted on the lower mold mounting plate by bolts engaging with the mounting holes. The spacing between the die inserts can be adjusted by adjusting the mounting position of the die inserts.

3. The loader cab cross-car beam compression mold of claim 2, wherein, The ejector is mounted on the lower mold mounting plate via an ejector spring and an ejector screw.

4. The loader cab cross-car beam compression mold of claim 3, wherein, Multiple sets of the ejector springs and ejector screws are arranged at intervals on the lower mold mounting plate. Multiple mating holes are spaced apart on the lower end face of the ejector, and each of the multiple mating holes corresponds to one of the multiple ejector screws.

5. The loader cab rib press mold as set forth in claim 1, wherein, The molding groove is a trapezoidal groove, the ejector is a trapezoidal ejector, and the forming positioning surface is a triangular positioning surface.

6. The loader cab rib press mold as set forth in claim 1, wherein, The guide assembly also includes a guide sleeve, which is installed on the lower end face of the upper mold mounting plate and located at the guide hole, and the guide sleeve is sleeved on the guide post.

7. The loader cab cross-car beam compression mold of claim 6, wherein, The guide assembly also includes a guide post spring, which is sleeved on the guide post and its lower end is mounted on the lower mold mounting plate. The upper end of the guide post spring abuts against the guide sleeve.

8. The loader cab rib press mold as set forth in claim 1, wherein, An upper mold pressure plate is installed on the upper end surface of the upper mold mounting plate. Multiple upper mold pressure plates are provided and spaced apart. Each upper mold pressure plate is provided with a connection hole.

9. The loader cab rib press mold as set forth in claim 1, wherein, A lower mold pad is installed on the lower end surface of the lower mold mounting plate. Multiple lower mold pads are provided and are spaced apart.

10. The loader cab load-bearing rib forming mold according to claim 1, characterized in that, Both the upper mold mounting plate and the lower mold mounting plate have multiple lifting lugs symmetrically arranged on their sides.

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