Truck pedal cold press forming die

Abstract

This utility model provides a cold-press forming mold for freight car foot pedals, belonging to the technical field of railway freight car equipment. It includes an upper mold plate, a lower mold plate, and a guide assembly. An upper mold insert is mounted on the lower end face of the upper mold plate, with a forming protrusion in the center of its lower end face. The lower end face of the upper mold insert, the lower end face of the forming protrusion, and both sides have sequentially connected upper forming grooves. A lower mold insert is mounted on the upper end face of the lower mold plate, with a forming recess in the center of its upper end face. The upper end face of the lower mold insert, the lower end face of the forming recess, and both sides have sequentially connected lower forming grooves, together forming the foot pedal forming cavity. The guide assembly includes a guide sleeve and a guide post. The guide sleeve is vertically fixed to the upper end face of the lower mold plate, and the guide post is vertically fixed to the lower end face of the upper mold plate. This mold reduces energy consumption (electricity, gas, etc.) and production costs, avoids smoke and harmful exhaust gases generated at high temperatures, reduces harm to the environment and operator health, and features a continuous cold-press forming process with simple procedures and a short cycle, making it more efficient than hot forging.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway freight car technology and equipment, and more specifically, it relates to a cold-pressing mold for freight car foot pedals. Background Technology

[0002] In the field of truck parts manufacturing, foot pedals are a key component that ensures the safety of drivers and passengers getting on and off vehicles, and their forming process has long been dominated by hot forging.

[0003] Hot forging requires heating metal billets to high temperatures (typically exceeding 800°C) to induce plastic deformation. This process relies heavily on electricity or natural gas as a heat source, resulting in enormous daily energy consumption for large-scale truck component manufacturers, directly contributing to a high proportion of energy costs in production. Especially given the current volatility in energy prices, companies struggle to control these costs, significantly squeezing profit margins. Furthermore, the complexity of the hot forging process significantly extends the production cycle of a single foot pedal. The billet requires multiple heating steps, including preheating, heating, and holding, with the heating stage alone taking tens of minutes or even hours before entering the forging stage. After forging, subsequent processing such as cooling, deburring, and grinding is necessary, leading to poor process continuity and low production efficiency. Given the increasing market demand for truck components, this long-cycle production model struggles to meet the requirements of rapid delivery, hindering companies' capacity expansion.

[0004] Even more serious is the fact that hot forging generates a large amount of smoke and exhaust gas. When the metal billet is heated to high temperatures, surface oil and impurities burn and decompose, releasing gases containing harmful components such as sulfur dioxide and nitrogen oxides. The plastic deformation of the metal during forging also causes the splashing of fine particles, forming smoke and dust. If these pollutants are emitted directly without strict treatment, they will severely pollute the surrounding air quality, not only endangering the health of workers in the production workshop and increasing the risk of respiratory diseases, but also causing long-term negative impacts on the ecological environment. Utility Model Content

[0005] The purpose of this utility model is to provide a cold-pressing mold for truck pedals, which aims to solve the problems of high energy consumption, high cost, long production cycle, low efficiency, and serious pollution that endangers health in hot-forged truck pedals.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a cold-pressing mold for truck foot pedals, comprising:

[0007] The upper template has an upper mold insert installed on its lower end face. A forming protrusion is provided in the middle of the lower end face of the upper mold insert. The lower end face of the upper mold insert, the lower end face of the forming protrusion, and the two sides of the forming protrusion are provided with upper forming grooves that are connected in sequence.

[0008] The lower template has a lower mold insert installed on its upper end face. The upper end face of the lower mold insert has a forming recess that is adapted to the forming protrusion. The upper end face of the lower mold insert, the lower end face of the forming recess, and the two sides of the forming recess are provided with sequentially connected lower forming grooves. The upper forming groove and the lower forming groove together constitute the foot pedal forming cavity.

[0009] A guide assembly, comprising a guide sleeve and a guide post, wherein the guide sleeve is vertically fixed to the upper end face of the lower template, and the guide post is vertically fixed to the lower end face of the upper template, and the guide post and the guide sleeve are axially inserted and slidably fitted.

[0010] In one possible implementation, two limiting posts are provided at both ends of the upper end face of the lower mold insert, and a limiting gap is formed between the two limiting posts on the same side. The two limiting posts on the same side are located on both sides of the lower forming groove. Two limiting holes are provided at both ends of the lower end face of the upper mold insert, and the two limiting holes on the same side and the two limiting posts on the same side are inserted and fitted together.

[0011] In one possible implementation, an upper unloading groove is provided at the middle of the lower end face of the forming protrusion, and the upper unloading groove is perpendicular to the upper forming groove.

[0012] In one possible implementation, a lower unloading groove is provided at the middle of the upper end surface of the forming recess, and the lower unloading groove is perpendicular to the lower forming groove.

[0013] In one possible implementation, multiple upper forming grooves are arranged at intervals, and multiple lower forming grooves are arranged at intervals. The multiple upper forming grooves and multiple lower forming grooves correspond one-to-one and constitute multiple foot pedal forming cavities, which are parallel to each other.

[0014] In one possible implementation, the two sets of guide components are arranged diagonally between the upper template and the lower template.

[0015] In one possible implementation, lifting rings are symmetrically arranged on both sides of the upper template.

[0016] In one possible implementation, both the upper template and the lower template are 50mm thick Q235A steel plates.

[0017] In one possible implementation, both the upper mold insert and the lower mold insert are mold steel made of Cr12MoV material.

[0018] The beneficial effects of the cold-press forming mold for truck pedals provided by this utility model are as follows: Compared with the prior art, the metal blank to be processed is first placed on the upper part of the lower mold insert, ensuring that the position of the blank corresponds to the lower forming groove. Then, the equipment drives the upper mold plate to move downwards. At this time, the guide post on the lower end face of the upper mold plate is inserted into the guide sleeve on the upper end face of the lower mold plate. Under the axial sliding cooperation of the guide post and the guide sleeve, the upper and lower mold plates are precisely guided and aligned. As the upper mold plate continues to descend, the forming protrusion of the upper mold insert gradually inserts into the forming concave part of the lower mold insert. Under the extrusion of the forming protrusion and the forming concave part, the blank gradually fills the pedal forming cavity formed by the upper and lower forming grooves. When the mold is closed in place, the blank undergoes plastic deformation in a cold state, forming a truck pedal with a shape consistent with the pedal forming cavity. Finally, the upper mold plate moves upwards to reset, and the formed pedal is removed, completing one forming operation. This utility model provides a cold-press forming mold for truck foot pedals. The entire working process eliminates the need for high-temperature heating of the billet, removing the heating and cooling steps of hot forging. This not only significantly reduces energy consumption such as electricity and gas, thus lowering production costs, but also avoids the smoke and harmful exhaust gases generated by high-temperature heating, reducing environmental pollution and harm to the health of operators. The cold-press forming process is continuous, from material feeding and mold closing to part removal, with simple procedures and a short cycle time, significantly improving production efficiency compared to hot forging. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A front view of a cold-pressing mold for truck pedals provided by this utility model;

[0021] Figure 2 The front view of the upper template and upper mold insert provided by this utility model;

[0022] Figure 3 The front view of the lower template and lower mold insert provided by this utility model;

[0023] Figure 4 A top view of the lower template and lower mold insert provided by this utility model.

[0024] In the diagram: 1. Upper template; 2. Upper mold insert; 3. Forming protrusion; 4. Upper forming groove; 5. Lower template; 6. Lower mold insert; 7. Forming recess; 8. Lower forming groove; 9. Foot-operated forming cavity; 10. Guide sleeve; 11. Guide post; 12. Limiting post; 13. Limiting hole; 14. Upper unloading groove; 15. Lower unloading groove; 16. Lifting ring. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0027] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0028] Please see Figures 1 to 4 The present invention provides a cold-pressing mold for truck pedals. The cold-pressing mold for truck pedals includes an upper template 1, a lower template 5, and a guide assembly. An upper mold insert 2 is installed on the lower end face of the upper mold plate 1. A forming protrusion 3 is provided in the middle of the lower end face of the upper mold insert 2. An upper forming groove 4 is opened in sequence on the lower end face of the upper mold insert 2, the lower end face of the forming protrusion 3, and the two sides of the forming protrusion 3. A lower mold insert 6 is installed on the upper end face of the lower mold plate 5. A forming recess 7 that is adapted to the forming protrusion 3 is provided in the middle of the upper end face of the lower mold insert 6. A lower forming groove 8 is opened in sequence on the upper end face of the lower mold insert 6, the lower end face of the forming recess 7, and the two sides of the forming recess 7. The upper forming groove 4 and the lower forming groove 8 together constitute the foot pedal forming cavity 9. The guide assembly includes a guide sleeve 10 and a guide post 11. The guide sleeve 10 is vertically fixed to the upper end face of the lower mold plate 5, and the guide post 11 is vertically fixed to the lower end face of the upper mold plate 1. The guide post 11 and the guide sleeve 10 are axially inserted and slidably fitted.

[0029] This utility model provides a cold-press forming mold for truck pedals. Compared with the prior art, the metal blank to be processed is first placed on the upper part of the lower mold insert 6, ensuring that the position of the blank corresponds to the lower forming groove 8. Then, the equipment drives the upper mold plate 1 to move downward. At this time, the guide post 11 on the lower end face of the upper mold plate 1 is inserted into the guide sleeve 10 on the upper end face of the lower mold plate 5. Under the axial insertion and sliding cooperation of the guide post 11 and the guide sleeve 10, the upper mold plate 1 and the lower mold plate 5 are accurately guided and aligned. As the upper mold plate 1 continues to descend, the forming protrusion 3 of the upper mold insert 2 is gradually inserted into the forming concave part 7 of the lower mold insert 6. Under the extrusion of the forming protrusion 3 and the forming concave part 7, the blank gradually fills the pedal forming cavity 9 formed by the upper forming groove 4 and the lower forming groove 8. When the mold is closed, the blank completes plastic deformation in a cold state, forming a truck pedal with the same shape as the pedal forming cavity 9. Finally, the upper mold plate 1 moves upward to reset, and the formed pedal is taken out, completing one forming operation. This utility model provides a cold-press forming mold for truck foot pedals. The entire working process eliminates the need for high-temperature heating of the billet, removing the heating and cooling steps of hot forging. This not only significantly reduces energy consumption such as electricity and gas, thus lowering production costs, but also avoids the smoke and harmful exhaust gases generated by high-temperature heating, reducing environmental pollution and harm to the health of operators. The cold-press forming process is continuous, from material feeding and mold closing to part removal, with simple procedures and a short cycle time, significantly improving production efficiency compared to hot forging.

[0030] Two limiting posts 12 are provided at both ends of the upper surface of the lower mold insert 6, forming a limiting gap between the two limiting posts 12 on the same side. The two limiting posts 12 on the same side are located on both sides of the lower forming groove 8. Two limiting holes 13 are provided at both ends of the lower surface of the upper mold insert 2, and the two limiting holes 13 on the same side and the two limiting posts 12 on the same side are inserted into each other. The insertion and engagement of the limiting posts 12 of the lower mold insert 6 with the limiting holes 13 of the upper mold insert 2 can further improve the positioning accuracy during mold closing. The limiting gap formed by the limiting posts 12 on the same side can pre-position the blank, preventing it from shifting during cold pressing and ensuring that the blank is accurately filled into the foot pedal forming cavity 9. This double limiting structure, in conjunction with the guide component, reduces mold closing deviation, improves the dimensional consistency of foot pedal forming, reduces scrap rate, and ensures the stability of the cold pressing process, making the continuous forming process more reliable.

[0031] An upper unloading groove 14 is provided in the middle of the lower end face of the forming protrusion 3. The upper unloading groove 14 is perpendicular to the upper forming groove 4 and can assist in unloading after cold pressing. When the mold is opened, the unloading groove provides space for the unloading device or the elasticity of the blank itself to play its role, reducing the adhesion between the foot pedal and the upper mold insert 2 after forming, making it easier for the foot pedal to detach from the upper forming groove 4, and avoiding workpiece damage or production stoppage caused by unloading difficulties. In addition, for foot pedals that are stuck in the upper unloading groove 14 and are difficult to remove, the operator can also insert tools such as flat chisels or special unloading rods into the upper unloading groove 14, and apply downward force to the foot pedal to easily push off the foot pedal that is slightly stuck to the upper mold insert 2.

[0032] A lower unloading groove 15 is provided in the middle of the upper end face of the forming recess 7. The lower unloading groove 15 is perpendicular to the lower forming groove 8 and can help the foot pedal to be removed from the lower mold insert 6 after cold pressing. After the foot pedal is formed in the lower forming groove 8, it may stick to the lower mold insert 6 due to the squeezing effect. At this time, the lower unloading groove 15 provides space for tools to intervene. The operator can insert tools such as flat chisels and special unloading rods into it and easily separate the foot pedal from the lower forming groove 8 by applying external force. This avoids deformation of the foot pedal or damage to the lower mold insert 6 caused by forcibly removing it due to difficulty in unloading, and ensures product quality and mold life.

[0033] Multiple upper forming grooves 4 and multiple lower forming grooves 8 are arranged at intervals. These upper and lower forming grooves 4 and 8 correspond one-to-one and form multiple foot pedal forming cavities 9. These cavities 9 are parallel to each other, enabling the cold pressing of multiple truck foot pedals in a single operation. This significantly increases output per unit time, substantially improves production efficiency, reduces energy consumption and time costs per unit, and ensures consistent forming quality across multiple products.

[0034] Two sets of guide components are arranged diagonally between the upper mold plate 1 and the lower mold plate 5, forming stable support and guidance from the diagonal direction. This layout can evenly distribute the force during mold closing, reducing tilting or offset caused by uneven force on the upper mold plate 1 and the lower mold plate 5, and further improving mold closing accuracy. At the same time, the diagonally arranged guide structure can more comprehensively limit the horizontal sway of the mold, ensuring precise alignment of the upper mold insert 2 and the lower mold insert 6, ensuring the synchronous and stable operation of multiple foot-operated molding cavities 9, and reducing the product defect rate caused by positioning deviation.

[0035] The upper template 1 is symmetrically equipped with lifting rings 16 on both sides, facilitating the handling, installation, and debugging of the mold. The lifting rings 16 allow for the stable hoisting of the upper template 1 using lifting equipment, preventing tilting and collisions caused by uneven force during transport and reducing the risk of mold damage. The symmetrical layout ensures balance and stability during hoisting, facilitating precise alignment and installation of the upper template 1 with the lower template 5. It also allows for easy movement of the upper template 1 during maintenance or component replacement, improving the efficiency of mold loading, unloading, and maintenance, and reducing the labor intensity of manual handling.

[0036] Specifically, both the upper mold plate 1 and the lower mold plate 5 are made of 50mm thick Q235A steel plates. Q235A steel has moderate strength and good toughness, which can withstand the impact and pressure during cold pressing, ensuring the stability of the mold structure. The 50mm thickness provides sufficient rigidity, reduces stress deformation, ensures molding accuracy, and the steel is also low in cost and easy to process, balancing the durability and economy of the mold.

[0037] Specifically, both the upper mold insert 2 and the lower mold insert 6 are made of Cr12MoV mold steel, which has high hardness, high wear resistance, and good hardenability, enabling it to withstand frequent extrusion and friction during cold pressing. Its excellent wear resistance reduces wear on the inserts during long-term use, extends the mold's service life, and reduces replacement frequency and maintenance costs; its high hardness ensures the shape stability of the forming protrusion 3 and concave part, ensuring the long-term reliability of the foot pedal forming cavity 9, thereby guaranteeing consistent forming quality of the truck foot pedal, suitable for large-scale, high-strength production needs.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold-pressing mold for truck foot pedals, characterized in that, include: The upper template (1) has an upper mold insert (2) installed on its lower end face. A forming protrusion (3) is provided in the middle of the lower end face of the upper mold insert (2). The lower end face of the upper mold insert (2), the lower end face of the forming protrusion (3), and the two sides of the forming protrusion (3) are provided with upper forming grooves (4) that are connected in sequence. The lower template (5) has a lower mold insert (6) installed on its upper end face. The upper end face of the lower mold insert (6) is provided with a molding recess (7) that is adapted to the molding protrusion (3). The upper end face of the lower mold insert (6), the lower end face of the molding recess (7) and the two sides of the molding recess (7) are provided with sequentially connected lower molding grooves (8). The upper molding groove (4) and the lower molding groove (8) together constitute the foot pedal molding cavity (9). The guide assembly includes a guide sleeve (10) and a guide post (11). The guide sleeve (10) is vertically fixed to the upper end face of the lower template (5), and the guide post (11) is vertically fixed to the lower end face of the upper template (1). The guide post (11) and the guide sleeve (10) are axially inserted and slidably fitted.

2. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The lower mold insert (6) has two limiting posts (12) at both ends of its upper surface. A limiting gap is formed between the two limiting posts (12) on the same side. The two limiting posts (12) on the same side are located on both sides of the lower forming groove (8). The upper mold insert (2) has two limiting holes (13) at both ends of its lower surface. The two limiting holes (13) on the same side and the two limiting posts (12) on the same side are inserted into each other.

3. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The lower end face of the forming protrusion (3) is provided with an upper unloading groove (14), which is perpendicular to the upper forming groove (4).

4. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The upper end face of the molding recess (7) is provided with a lower unloading groove (15), which is perpendicular to the lower molding groove (8).

5. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The upper forming groove (4) is arranged in a series of intervals, and the lower forming groove (8) is arranged in a series of intervals. The multiple upper forming grooves (4) and the multiple lower forming grooves (8) correspond one-to-one and constitute multiple foot pedal forming cavities (9). The multiple foot pedal forming cavities (9) are parallel to each other.

6. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The two sets of guide components are arranged diagonally between the upper template (1) and the lower template (5).

7. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, The upper template (1) is symmetrically provided with lifting rings (16) on both sides.

8. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, Both the upper template (1) and the lower template (5) are made of 50mm thick Q235A steel plates.

9. The cold-pressing mold for truck foot pedals as described in claim 1, characterized in that, Both the upper mold insert (2) and the lower mold insert (6) are mold steel made of Cr12MoV material.

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