Forming die for pedal production

Abstract

The utility model provides a forming die for pedal production. The forming die comprises a lower die plate and a lower die plate. The lower template is fixed on the lower side of the output end of the oil press; the upper side face of the lower die plate is provided with a lower forming groove allowing a blank to be embedded therein and a limiting structure used for being connected with the blank. The upper die plate is used for being connected with the output end of an oil press. The lower side face of the lower die plate is provided with an upper forming groove suitable for being communicated with the lower forming groove so that the blank can be embedded, and a positioning structure is arranged between the lower die plate and the upper die plate. When the positioning structure is connected with the upper die plate and the lower die plate, the lower forming groove can be communicated with the upper forming groove to form a forming cavity, the oil press can apply pressure to the blank to form a pedal matched with the forming cavity, and two supporting legs of the pedal extend upwards. According to the forming die for pedal production, a machining method integrating flattening and bending forming is utilized, the machining process is simplified, one-time forming of the pedal is achieved, and the pedal production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of railway freight car accessory production, and more particularly to a forming die for footrest production. BACKGROUND

[0002] The footrest is one of railway freight car accessories, which is installed on the railway freight car compartment and used for workers to step in and out of the railway freight car compartment. Figure 1 As shown in the figure, the footrest 5 includes a cylindrical support rod 51 and two support feet 52 bent towards the same side and connected to both ends of the support rod 51 respectively, and each support foot 52 adopts a flat structure.

[0003] The footrest is processed from a blank with Q235A material and φ16mm specification. The current processing procedure is to first cut the blank into the required bar, then cold press forming through the die to obtain a π-shaped structure, and finally hot forging and flattening the two end parts to obtain the flat two support feet.

[0004] The inventor finds that due to the large demand for railway freight car repair, the flatness of the two support feet is required to be high. However, in the existing footrest production, cold press forming is needed first, and then two times of hot forging and flattening are needed for the two support feet respectively, which is low in process efficiency, and the two times of hot forging and flattening cannot be unified in size, resulting in poor product quality. CONTENT OF THE UTILITY MODEL

[0005] The application aims to provide a forming die for footrest production to solve the technical problem of low process efficiency and poor product quality in the prior art that cold press forming is needed first and then two times of hot forging and flattening are needed for the two support feet respectively in the footrest production.

[0006] To achieve the above-mentioned purpose, the application adopts the technical scheme of providing a forming die for footrest production, which includes:

[0007] a lower die plate for being fixed at the lower side of the output end of an oil press, the upper side of the lower die plate having a lower forming groove for embedding a blank and a limiting structure for being connected with the blank; and

[0008] an upper die plate for being connected with the output end of the oil press, the lower side of the lower die plate having an upper forming groove adapted to be communicated with the lower forming groove to embed the blank, and the lower die plate and the upper die plate having a positioning structure therebetween;

[0009] When the positioning structure connects the upper die plate and the lower die plate, the lower forming groove can be communicated with the upper forming groove to form a forming cavity, and the oil press can apply pressure to the blank to form a footrest adapted to the forming cavity and make the two support feet of the footrest extend upwards.

[0010] Preferably, the positioning structure comprises a guide post arranged on the lower die plate and extending upwardly, and a guide sleeve arranged on the upper die plate and coaxially sleeved on the guide post.

[0011] Preferably, the limiting structure comprises:

[0012] two limiting grooves, each of which is arranged at the bottom of the lower forming groove and located at the two ends of the lower forming groove; and

[0013] two groups of limiting posts, each of which is arranged on the upper surface of the lower die plate and located at the two ends of the lower forming groove; each group of the limiting posts comprises two limiting posts, and the two limiting posts are arranged on the two sides of the limiting groove along the width direction of the limiting groove;

[0014] When the blank portion is inserted into the lower forming groove, the two ends of the blank are respectively inserted into the two limiting grooves and abut against the groove walls of the two limiting grooves, and the two limiting posts abut against the two sides of the blank.

[0015] Preferably, the axial direction of each limiting post is parallel to the up-down direction, and the upper die plate is provided with a plurality of alignment holes which are penetrated along the up-down direction and suitable for the one-to-one insertion of the plurality of limiting posts.

[0016] Preferably, each limiting post adopts a screw rod structure, and the lower die plate is provided with a plurality of threaded holes which are penetrated along the up-down direction and suitable for the one-to-one threaded connection of the plurality of screw rod structures.

[0017] Preferably, the upper surface of the lower die plate is provided with a material removal groove; the material removal groove is communicated with the lower forming groove and extends to the two sides of the lower die plate along the width direction of the lower forming groove.

[0018] Preferably, the groove bottom of the material removal groove is located below the groove bottom of the lower forming groove.

[0019] Preferably, the upper die plate comprises an upper cover plate and an upper inlay block detachably connected with the upper cover plate; the upper forming groove is arranged on the lower side of the upper inlay block, and the positioning structure is arranged between the upper cover plate and the lower die plate.

[0020] Preferably, the lower die plate comprises a lower cover plate and a lower inlay block detachably connected with the lower cover plate; the lower forming groove is arranged on the upper side of the lower inlay block, and the positioning structure is arranged between the lower cover plate and the upper die plate.

[0021] As preferred, the lower forming grooves and the upper forming grooves are multiple, and the multiple upper forming grooves are adapted to communicate with the multiple lower forming grooves one by one.

[0022] In the embodiment of the present application, the workers can hoist the forming die to the workbench of the oil press by the crown block, and then install the forming die to the pressure center position of the equipment, fix the lower die plate to the lower side of the output end of the oil press, and fix the upper die plate to the output end of the oil press. The workers can embed the blank into the lower forming groove on the lower die plate, and the limiting structure on the lower die plate can limit the position of the blank. When the upper die plate and the lower die plate are connected through the positioning structure, the lower forming groove can communicate with the upper forming groove to form a forming cavity. The workers can apply pressure to the blank by controlling the oil press to form a pedal that is matched with the forming cavity

[0023] Compared with the prior art, the forming die for pedal production provided in the present application optimizes the process flow, saves the hot forging step, and improves the product quality and efficiency of the pedal by using the die to replace the traditional cold forming and then hot forging processing method. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of the pedal in the prior art;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of the forming die for pedal production provided in the embodiment of the present application Figure 1 ;

[0027] Figure 3 A schematic diagram of the three-dimensional structure of the forming die for pedal production provided in the embodiment of the present application Figure 2 ;

[0028] Figure 4 A schematic diagram of the three-dimensional structure of the lower die plate used in the embodiment of the present application;

[0029] Figure 5 A schematic diagram of the three-dimensional structure of the lower die plate used in the embodiment of the present application; Figure 4

[0030] Figure 6 A schematic diagram of the three-dimensional structure of the upper die plate used in the embodiment of the present application;

[0031] Figure 7 ​An explosion structure schematic diagram of a forming die for pedal production provided by the embodiment of the present application is shown in the figure;

[0032] In the figure, various reference signs are as follows:

[0033] 1, lower die plate; 11, lower cover plate; 12, lower insert block; 13, lower forming groove; 14, material returning groove; 15, threaded hole; 2, upper die plate; 21, upper cover plate; 22, upper insert block; 23, upper forming groove; 24, alignment hole; 3, positioning structure; 31, guide column; 32, guide sleeve; 4, limiting structure; 41, limiting groove; 42, limiting column; 5, pedal; 51, support rod; 52, support foot; 6, blank. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] It needs to be noted that the foot pedal 5 is one of the accessories of the railway freight car, which is installed on the railway freight car compartment for the staff to step in and out of the freight car compartment; the foot pedal 5 comprises a cylindrical support rod 51, and two support feet 52 curved towards the same side and connected with both ends of the support rod 51 respectively, and each support foot 52 adopts a flat structure; the foot pedal 5 is processed from a blank 6 with Q235A material and φ16mm specification, and the general process is to cut the blank 6 into a required bar first, then cold-press forming through a die to obtain a π-shaped structure, and finally hot forging and flattening two end portions to obtain two flat support feet 52.

[0039] Please see Figures 1 to 7 , the forming die for producing the foot pedal provided by the present application will be described. The forming die for producing the foot pedal comprises a lower die plate 1 and an upper die plate 2.

[0040] The lower die plate 1 is used for being fixed to the lower side of the output end of an oil press; the upper side of the lower die plate 1 is provided with a lower forming groove 13 for embedding the blank 6, and a limiting structure 4 for being connected with the blank 6; the limiting structure 4 is used for positioning the blank 6 to ensure that the lengths of two ends of the foot pedal 5 after forming are equal.

[0041] The upper die plate 2 is used for being connected with the output end of the oil press; the lower side of the lower die plate 1 is provided with an upper forming groove 23 suitable for being communicated with the lower forming groove 13 to embed the blank 6, and the lower die plate 1 and the upper die plate 2 are provided with a positioning structure 3 therebetween; the positioning structure 3 is used for ensuring that the blank 6 does not deviate during the forming process.

[0042] Considering the case that the outer diameter of the blank 6 is slightly small, the closing gap of the upper die plate 2 and the lower die plate 1 is designed to be about 0.7mm; the upper die plate 2 and the lower die plate 1 are designed as an integrated structure of flattening and forming, and the closing gap of both ends of the upper die plate 2 and the lower die plate 1 is the flattening thickness, so that the flatness of the two support feet 52 of the foot pedal is ≤1mm.

[0043] When the positioning structure 3 connects the upper die plate 2 and the lower die plate 1, the lower forming groove 13 can be communicated with the upper forming groove 23 to form a forming cavity, and the oil press can apply pressure to the blank 6 to form the foot pedal 5 matched with the forming cavity, and make the two support feet 52 of the foot pedal 5 extend upwards.

[0044] In the embodiment of the application, the worker can hoist the forming die to the workbench of the oil press by the crown block, then install the forming die to the pressure center position of the equipment, fix the lower die plate 1 to the lower side of the output end of the oil press, and fix the upper die plate 2 to the output end of the oil press. The worker can embed the blank 6 into the lower forming groove 13 on the lower die plate 1, and the limiting structure 4 on the lower die plate 1 can limit the position of the blank 6. When the upper die plate 2 and the lower die plate 1 are connected through the positioning structure 3, the lower forming groove 13 can be communicated with the upper forming groove 23 to form a forming cavity, and the worker can apply pressure to the blank 6 by controlling the oil press to form the foot pedal 5 matched with the forming cavity

[0045] The forming die for foot pedal production provided in the application can replace the traditional cold forming and then hot forging forming processing method, optimize the process flow, save the hot forging step, and improve the product quality and efficiency of the foot pedal 5.

[0046] In some embodiments, please refer to Figures 1 to 7 As a specific embodiment of the forming die for foot pedal production provided in the application, the positioning structure 3 includes a guide column 31 arranged on the lower die plate 1 and extending upward, and a guide sleeve 32 arranged on the upper die plate 2 and used for coaxially sleeving the guide column 31. The guide sleeve 32 is in sliding connection with the guide column 31. In order to reduce the friction, the inner wall of the guide sleeve 32 and the outer wall of the guide column 31 are both polished, and lubricant is coated between the guide column 31 and the guide sleeve 32. The guide column 31 and the guide sleeve 32 can be multiple groups and symmetrically arranged between the lower die plate 1 and the upper die plate 2.

[0047] By adopting the above technical solution, when the output end of the oil press drives the upper die plate 2 to move towards the lower die plate 1, the relative movement between the lower die plate 1 and the upper die plate 2 in the horizontal direction is avoided, so that the deviation of the blank 6 in the forming process is avoided, and the production quality of the foot pedal 5 is improved.

[0048] In some embodiments, please refer to Figures 1 to 7 As a specific embodiment of the forming die for foot pedal production provided in the application, the limiting structure 4 includes two limiting grooves 41 and two limiting columns 42.

[0049] The two limiting grooves 41 are both arranged on the groove bottom of the lower forming groove 13 and respectively located at the two ends of the lower forming groove 13. The shape of each limiting groove 41 is matched with the end of the blank 6. When the blank 6 is embedded into the lower forming groove 13, the two ends of the blank 6 are respectively embedded into the two limiting grooves 41, so that the deviation of the blank 6 in the axial direction of the lower forming groove 13 in the forming process is avoided, the first positioning of the blank 6 is realized, and the length dimensions of the two supporting feet 52 of the foot pedal 5 after forming are ensured to be equal.

[0050] The two groups of limiting columns 42 are arranged on the upper surface of the lower die plate 1 and are respectively located at the two ends of the lower forming groove 13; each group of limiting columns 42 includes two limiting columns 42, and the two limiting columns 42 are arranged on the two sides of the limiting groove 41 along the width direction of the limiting groove 41; when the two ends of the blank 6 are respectively embedded in the two limiting grooves 41, the outer walls of the two limiting columns 42 respectively abut against the outer wall of the blank 6, so as to ensure that the blank 6 does not deviate in the horizontal direction during the forming process, thereby realizing the secondary positioning of the blank 6 and avoiding that the blank 6 is separated from the lower forming groove 13 during the forming process.

[0051] By adopting the above technical scheme, when the blank 6 is partially embedded in the lower forming groove 13, the two ends of the blank 6 are respectively embedded in the two limiting grooves 41 and abut against the groove walls of the two limiting grooves 41, and the two limiting columns 42 respectively abut against the two sides of the blank 6; through the cooperation of the limiting grooves 41 and the limiting columns 42, the positioning of the blank 6 in the front-rear and left-right directions is realized, and the forming quality of the pedal 5 is improved.

[0052] In some embodiments, please refer to Figures 1 to 7 , as a specific embodiment of the forming die for pedal production provided in the present application, the axial direction of each limiting column 42 is parallel to the up-down direction, and the upper die plate 2 is provided with a plurality of alignment holes 24 which are penetrated along the up-down direction and are suitable for one-to-one corresponding insertion of the plurality of limiting columns 42.

[0053] By adopting the above technical scheme, when the upper die plate 2 is driven by the output end of the oil press to move towards the lower die plate 1, each limiting column 42 can be inserted into the corresponding alignment hole 24, thereby avoiding collision between the limiting column 42 and the upper die plate 2.

[0054] In some embodiments, please refer to Figures 1 to 7 , as a specific embodiment of the forming die for pedal production provided in the present application, each limiting column 42 adopts a screw rod structure, and the lower die plate 1 is provided with a plurality of threaded holes 15 which are penetrated along the up-down direction and are suitable for one-to-one corresponding threaded connection with the plurality of screw rod structures.

[0055] By adopting the above technical scheme, the installation or disassembly can be completed by rotating the limiting column 42, and the staff can conveniently replace the limiting column 42.

[0056] In some embodiments, please refer to Figures 1 to 7As a specific embodiment of the forming die for pedal production provided in the present application, the upper surface of the lower die plate 1 is provided with a material removal groove 14; the material removal groove 14 is communicated with the lower forming groove 13 and extends along the width direction of the lower forming groove 13 to the two sides of the lower die plate 1; the staff can lift the formed pedal 5 by inserting a tool into the limiting groove 41, so as to separate the pedal 5 from the lower forming groove 13; the lower surface of the upper die plate 2 can also be provided with a material removal groove 14, which is communicated with the upper forming groove 23; when the pedal 5 is in contact with the upper forming groove 23, the formed pedal 5 can be lifted by inserting a tool into the limiting groove 41, so as to separate the pedal 5 from the upper forming groove 23.

[0057] By adopting the above technical scheme, by providing the material removal groove 14 on the lower die plate 1 and the upper die plate 2, the strip material caused by the oversize of the blank 6 can be prevented, and the directional ejection is realized through the material removal groove 14, so as to ensure the smooth ejection of the workpiece.

[0058] In some embodiments, please refer to Figures 1 to 7 As a specific embodiment of the forming die for pedal production provided in the present application, the groove bottom of the material removal groove 14 is located on the lower side of the groove bottom of the lower forming groove 13; there is a gap between the groove bottom of the material removal groove 14 and the groove bottom of the lower forming groove 13, so that the staff can conveniently insert a tool into the gap, thereby conveniently lifting the formed pedal 5.

[0059] In some embodiments, please refer to Figure 7 As a specific embodiment of the forming die for pedal production provided in the present application, the upper die plate 2 comprises an upper cover plate 21 and an upper inlay block 22 which is detachably connected with the upper cover plate 21; the upper forming groove 23 is arranged on the lower side of the upper inlay block 22, and the positioning structure 3 is arranged between the upper cover plate 21 and the lower die plate 1; the lower surface of the upper cover plate 21 is provided with a first recess for embedding the upper inlay block 22, and the first recess can limit the relative movement between the upper inlay block 22 and the upper cover plate 21.

[0060] By adopting the above technical scheme, the upper die plate 2 adopts a split structure, so that the upper inlay block 22 can be replaced according to the model of the pedal 5 to be produced, or the upper inlay block 22 can be conveniently replaced when maintenance is needed.

[0061] In some embodiments, please refer to Figure 7As a specific embodiment of the forming die for pedal production provided in the present application, the lower die plate 1 comprises a lower cover plate 11 and a lower insert block 12 detachably connected with the lower cover plate 11; wherein the lower forming groove 13 is arranged on the upper side of the lower insert block 12, and the positioning structure 3 is arranged between the lower cover plate 11 and the upper die plate 2; the upper surface of the lower cover plate 11 is provided with a second groove for embedding the lower insert block 12, and the second groove can limit the relative movement between the lower insert block 12 and the lower cover plate 11.

[0062] By adopting the above technical scheme, the lower die plate 1 adopts a split structure, so that the lower insert block 12 can be replaced according to the model of the pedal 5 to be produced, or the lower insert block 12 can be conveniently replaced when maintenance is required.

[0063] In some embodiments, please refer to Figures 1 to 7 As a specific embodiment of the forming die for pedal production provided in the present application, the lower forming groove 13 and the upper forming groove 23 are both multiple, and the multiple upper forming grooves 23 are adapted to communicate one by one with the multiple lower forming grooves 13.

[0064] By adopting the above technical scheme, the forming die can realize the production scheme of one or two or multiple pieces at a time according to different pressure equipment, realize the one-time forming of multiple pedals 5, improve the production efficiency of the pedal 5, and reduce the mold manufacturing cost.

[0065] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A forming mold for use in footbed production, characterized by, The utility model relates to a kind of moulding device, including: Lower mould plate, for being fixed in the output end lower side of oil press;The upper side of the lower mould plate has lower forming groove for blank embedding, and limiting structure for being connected with the blank; And Upper mould plate, for being connected with the output end of the oil press;The lower side of the lower mould plate has upper forming groove suitable for being communicated with the lower forming groove to make the blank embedding, and the lower mould plate has a certain positioning structure with the upper mould plate; Wherein, when the positioning structure connects the upper mould plate and the lower mould plate, the lower forming groove can be communicated with the upper forming groove to form a forming cavity, and the oil press can apply pressure to the blank, to form footrest adapted to the forming cavity, and make both support feet of the footrest extend upward.

2. The forming mold for a footrest production according to claim 1, wherein The positioning structure includes guide column arranged on the lower mould plate and extending upward, and guide sleeve arranged on the upper mould plate and coaxially sleeved on the guide column.

3. The forming mold for a footrest production as claimed in claim 1, wherein The limiting structure includes: Two limiting grooves, each being formed in the groove bottom of the lower forming groove, and being located at both ends of the lower forming groove respectively;And Two groups of limiting columns, each being arranged on the upper surface of the lower mould plate and being located at both ends of the lower forming groove respectively;Each group of the limiting columns includes two limiting columns, and the two limiting columns are arranged on both sides of the limiting groove along the width direction of the limiting groove; Wherein, when the blank is partially embedded in the lower forming groove, both ends of the blank are embedded in two limiting grooves respectively, abut against the groove wall of two limiting grooves, and two limiting columns abut against both sides of the blank respectively.

4. The forming mold for a footrest production according to claim 3, wherein The axial direction of each limiting column is parallel to the up-down direction, and the upper mould plate is provided with a plurality of alignment holes penetrating along the up-down direction and suitable for one-to-one corresponding insertion of a plurality of limiting columns.

5. The forming mold for a footrest production according to claim 4, wherein Each limiting column adopts screw rod structure, and the lower mould plate is provided with a plurality of threaded holes penetrating along the up-down direction and suitable for one-to-one corresponding threaded connection of a plurality of screw rod structures.

6. The forming mold for a footrest production as claimed in claim 1, wherein The upper surface of the lower mould plate is provided with a material returning groove;The material returning groove is communicated with the lower forming groove, and extends to both sides of the lower mould plate along the width direction of the lower forming groove.

7. The forming mold for a footrest production as recited in claim 6, wherein The groove bottom of the material returning groove is below the groove bottom of the lower forming groove.

8. The forming mold for a footrest production as claimed in claim 1, wherein The upper mould plate includes upper cover plate and upper inlay block detachably connected with the upper cover plate;The upper forming groove is arranged on the lower side of the upper inlay block, and the positioning structure is arranged between the upper cover plate and the lower mould plate.

9. The forming mold for a footrest production as claimed in claim 1, wherein The lower mould plate includes lower cover plate and lower inlay block detachably connected with the lower cover plate;The lower forming groove is arranged on the upper side of the lower inlay block, and the positioning structure is arranged between the lower cover plate and the upper mould plate.

10. The forming mold for pedal production according to any one of claims 1 to 9, wherein The lower forming groove and the upper forming groove are a plurality of, and a plurality of upper forming grooves are suitable for one-to-one corresponding communication with a plurality of lower forming grooves.

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