Die filling gap bridge and base plate structure in compression molding

Abstract

The utility model relates to a die-filling gap bridge and base plate structure in compression molding. Comprising a stamping assembly, a bridging assembly and a fixing assembly, the stamping assembly comprises a fixed punch and a floating punch, and the floating punch is movably connected into the fixed punch; the bridge assembly comprises a bridge and a base plate, penetrating holes and cylinders are arranged on the bridge, through holes and through holes are formed in the base plate, the top ends of the cylinders are connected with the bottom of the fixed punch, the bottom of the floating punch is connected with the base plate, and the through holes are movably connected to the outer side walls of the cylinders. The fixing assembly comprises a floating plate, a fixing plate and a core rod, a containing cavity is formed in the floating plate, the bridge is arranged in the containing cavity in a matched mode, and the core rod penetrates through the fixing plate to be matched with the penetrating hole and the through hole. The utility model provides a gap bridge and a corresponding base plate structure, so that a special mesh-shaped structure product is also suitable for a hydraulic press, and a choice of a die-filling mode is provided for a product with step height in a hole, that is, a core rod part can be arranged on a floating plate of the hydraulic press, and the step height of the hole can be controlled through a side cylinder.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy pressing and forming, and in particular relates to a die bridge and a pad structure in pressing and forming. Background Art

[0002] At present, according to the driving device of powder metallurgy forming presses, there are mainly mechanical presses and hydraulic presses. The molding of products requires a complete set of molds, and the mold parts mainly include: upper punch part, mold cavity part, lower floating punch part, lower fixed punch part, and core rod part; the products can be divided into T-type products with normal structure and special mesh-type products. The T-type structure is suitable for all presses, while the special mesh-type structure is suitable for mechanical presses; if the product with a step height in the product hole is assembled on a hydraulic press, the core rod part can only be installed on the center cylinder of the press, and the step height of the hole is controlled by a strong floating column. Compared with the mold designed for T-type structure products, if the mold of the mesh-type product is also designed in the conventional way, there will be interference between the fixed punch and the floating punch or the floating punch and the core rod. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a mold bridge and pad structure in press molding, provides a bridge and a corresponding pad structure, so that special mesh structure products are also suitable for hydraulic presses, and provides a mold loading method option for products with step heights in the hole, that is, the core rod part can be installed on the floating plate of the hydraulic press, and the step height of the hole can be controlled by the side cylinder.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A die bridge and pad structure for press forming, comprising a stamping assembly, a bridge assembly and a fixed assembly, wherein the stamping assembly comprises a fixed punch and a floating punch, and the floating punch can be movably connected to the fixed punch;

[0006] The bridge assembly includes a bridge and a pad, the bridge is provided with a perforation and a cylinder, the pad is provided with a through hole and a through hole, the top of the cylinder is connected to the bottom of the fixed punch, the bottom of the floating punch is connected to the pad, and the through hole can be movably connected to the outer wall of the cylinder;

[0007] The fixing assembly comprises a floating plate, a fixing plate and a core rod. The floating plate is provided with a receiving cavity, the bridge is matched in the receiving cavity, and the core rod passes through the fixing plate and matches with the through hole and the through hole.

[0008] The die bridge and pad structure in the press forming of this structure are arranged, the fixed plate is arranged at the bottom to provide the most basic support, the floating plate floats up and down relative to the fixed plate under the thrust of the side cylinder, the bridge is arranged in the accommodating cavity of the floating plate, the upper end of the pad is connected with the floating punch, the bottom surface of the pad is overlapped on the top of the floating plate, as the floating plate moves up and down, the pad and the floating punch will be driven to move up and down, and the upper end of the bridge is connected to the bottom of the fixed punch through the cylinder, the through hole on the pad can be movably connected to the outer wall of the cylinder, that is, the fixed punch will remain relatively motionless, and the fixed punch wraps the floating punch The floating punch will move with the up and down movement of the floating plate. If the mold is designed according to the normal T-type structure product, it is impossible to avoid the interference between the fixed punch and the floating punch. In actual implementation, the bridge will raise the fixed punch, and the floating punch is installed on the pad. The fixed plate is fixed and stationary. The floating plate moves up and down, and the pad and the floating punch move up and down together to adjust the height of the product, thereby realizing the mold installation and production of the mesh structure product on the hydraulic press. The core rod can move upward through the fixed plate, pass through the perforation on the bridge, and then pass through the through hole on the pad, and the core rod can pass through the floating punch.

[0009] Furthermore, the bridge includes a washer, which is provided with a threaded hole and a countersunk hole, and the cylinder is provided with a stud, which cooperates with the threaded hole, and the through hole is set on the washer. The washer is fixed to the fixed plate by screws, and the cylinder includes four cylinders, and the four cylinders are of the same height.

[0010] Furthermore, the top end of the core rod is connected to the bottom end of the pad.

[0011] Compared with the prior art, the advantages of the utility model are: the floating punch is wrapped by the fixed punch, and the floating punch will be displaced as the floating plate moves up and down. In actual production, the fixed punch is lifted by the bridge, and the floating punch is installed on the pad. The fixed plate is fixed and stationary, and the floating plate moves up and down, and the pad and the floating punch move up and down together to adjust the height of the product, thereby realizing the molding and production of mesh-type structure products on the hydraulic press, avoiding the interference between the fixed punch and the floating punch. The structure is simple and easy to assemble, and is suitable for the molding and production of mesh-type structure products on the hydraulic press, which solves the limitations of the hydraulic press and provides a more choice of molding methods for products with step heights in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 For the utility model Figure 2 AA section view;

[0016] Figure 4 It is a schematic diagram of the bridge of the present utility model.

[0017] Among them: 1. stamping assembly; 11. fixed punch; 12. floating punch; 2. bridging assembly; 21. bridge; 211. perforation; 212. cylinder; 2121. stud; 213. washer; 2131. threaded hole; 2132. countersunk hole; 22. pad; 221. through hole; 222. through hole; 3. fixed assembly; 31. floating plate; 311. accommodating cavity; 32. fixed plate; 33. core rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0019] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0020] Example 1

[0021] like Figure 1-4 As shown, a die bridge and pad structure in press forming includes a stamping component 1, a bridge component 2 and a fixed component 3, wherein the stamping component 1 includes a fixed punch 11 and a floating punch 12, and the floating punch 12 can be movably connected to the fixed punch 11;

[0022] The bridge assembly 2 includes a bridge 21 and a pad 22. The bridge 21 is provided with a through hole 211 and a cylinder 212. The pad 22 is provided with a through hole 221 and a through hole 222. The top of the cylinder 212 is connected to the bottom of the fixed punch 11, and the bottom of the floating punch 12 is connected to the pad 22. The through hole 222 can be movably connected to the outer wall of the cylinder 212.

[0023] The fixing assembly 3 includes a floating plate 31 , a fixing plate 32 and a core rod 33 . The floating plate 31 is provided with a receiving cavity 311 . The bridge 21 fits in the receiving cavity 311 . The core rod 33 passes through the fixing plate 32 and fits with the through hole 211 and the through hole 221 .

[0024] Furthermore, the bridge 21 includes a washer 213, which is provided with a threaded hole 2131 and a countersunk hole 2132. The cylinder 212 is provided with a stud 2121, which cooperates with the threaded hole 2131. The through hole 211 is set on the washer 213, and the washer 213 is fixed to the fixing plate 32 by screws. The cylinder 212 includes four cylinders, and the four cylinders 212 have the same height.

[0025] Description of the working method of this utility model:

[0026] In the press forming process using this structure, the die bridge and pad structure are installed. The fixed plate 32 is arranged at the bottom to provide the most basic support. The floating plate 31 floats up and down relative to the fixed plate 32 under the thrust of the side cylinder. The bridge 21 is arranged in the accommodating cavity 311 of the floating plate 31. The upper end of the pad 22 is connected with the floating punch 12. The bottom surface of the pad 22 overlaps the upper part of the floating plate 31. As the floating plate 31 moves up and down, the pad 22 and the floating punch 12 will be driven to move up and down, and the upper end of the bridge 21 is connected to the fixed punch through the cylinder 212. The bottom of the cylinder 21 is connected, and the through hole 222 on the pad 22 can be movably connected to the outer wall of the cylinder 212, that is, the fixed punch 11 will remain relatively motionless, the fixed punch 11 wraps the floating punch 12, and the floating punch 12 will move with the up and down movement of the floating plate 31. If the mold is designed according to the normal T-shaped structure product, it is impossible to avoid the interference between the fixed punch 11 and the floating punch 12. In actual implementation, the bridge 21 raises the fixed punch 11, the floating punch 12 is installed on the pad 22, and the fixed plate 32 is fixed. The floating plate 31 moves up and down, and together with the pad 22 and the floating punch 12, the height of the product is adjusted, thereby realizing the molding and production of mesh-shaped structural products on the hydraulic press. The core rod 33 can move upward through the fixed plate 32, pass through the through hole 211 on the bridge 21, and then pass through the through hole 221 on the pad 22. The core rod 33 can pass through the floating punch 12. The assembleable bridge assembly 2 consists of a 20mm thick gasket 213 and four detachable assembled cylinders 212. One end of the cylinder 212 has a thread. It is convenient to assemble on the washer 213, and the other end is provided with a threaded hole 2131 for convenient screw fixing; the corresponding pad 22 is determined according to the product structure, and the main difference is that a through hole 222 is reserved in the middle of the pad 22 for the core rod 33 to pass through; the bridge assembly 2 is installed on the fixed plate 32 of the press, the fixed punch 11 is installed on the bridge 21, and the corresponding pad 22 is installed on the floating plate 31. The floating punch 12 can pass through the bridge 21 and enter the fixed punch 11, thereby realizing the mold installation and production of the mesh-shaped structure product on the hydraulic press.

[0027] Example 2

[0028] The connection position of the mandrel 33 in this embodiment is different from that in Embodiment 1 in that:

[0029] The top end of the core rod 33 is connected to the bottom of the pad 22 .

[0030] The top end of the core rod 33 is connected to the bottom of the pad 22, which provides a new mold installation method for products with step height in the hole, that is, the core rod 33 originally installed at the center position of the fixed plate 32 can be connected to the pad 22, and the core rod 33 is driven by the up and down movement of the floating plate 31 to adjust the step height. Finally, the side cylinder of the machine can make the step height more stable during mass production.

[0031] The beneficial effect of the utility model is that the floating punch 12 is wrapped by the fixed punch 11, and the floating punch 12 will move with the up and down movement of the floating plate 31. In actual production, the bridge 21 raises the fixed punch 11, and the floating punch 12 is installed on the pad 22. The fixed plate 32 is fixed and immovable. The floating plate 31 moves up and down, and the pad 22 and the floating punch 12 move up and down together to adjust the height of the product, thereby realizing the mold installation and production of mesh-shaped structural products on the hydraulic press, avoiding the interference between the fixed punch 11 and the floating punch 12, and the structure is simple and easy to assemble. It is suitable for the molding and production of mesh-shaped structural products on hydraulic presses, which solves the limitations of hydraulic presses and provides an alternative molding method for products with step heights in the holes. In addition, the top of the core rod 33 is connected to the bottom of the pad 22, which provides a new molding method for products with step heights in the holes, that is, the core rod 33 originally installed at the center of the fixed plate 32 can be connected to the pad 22, and the core rod 33 is driven by the up and down movement of the floating plate 31, thereby adjusting the step height. Finally, the side cylinder of the machine can make the step height more stable during mass production.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A die bridge and pad structure for press forming, characterized in that: It includes a stamping assembly, a bridging assembly and a fixing assembly, wherein the stamping assembly includes a fixing punch and a floating punch, and the floating punch can be movably connected to the fixing punch; The bridge assembly includes a bridge and a pad, the bridge is provided with a perforation and a cylinder, the pad is provided with a through hole and a through hole, the top of the cylinder is connected to the bottom of the fixed punch, the bottom of the floating punch is connected to the pad, and the through hole can be movably connected to the outer wall of the cylinder; The fixing assembly comprises a floating plate, a fixing plate and a core rod. The floating plate is provided with a receiving cavity, the bridge is matched in the receiving cavity, and the core rod passes through the fixing plate and matches with the through hole and the through hole.

2. The die bridge and pad structure in press forming according to claim 1, characterized in that: The bridge comprises a washer, a threaded hole is arranged on the washer, a stud is arranged on the cylinder, the stud matches with the threaded hole, and the through hole is arranged on the washer.

3. The die bridge and pad structure in press forming according to claim 2, characterized in that: The washer is also provided with a countersunk hole, and the washer is fixed on the fixing plate by screws.

4. The die bridge and pad structure in press forming according to claim 2, characterized in that: The four cylinders have the same height.

5. The die bridge and pad structure for press forming according to claim 1, characterized in that: The top end of the core rod is connected to the bottom of the pad.

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