Forging die holder

Abstract

The utility model relates to a forging trimming composite die technical field especially relates to a kind of forging trimming die holder, including bottom plate, lower mould and locking assembly, lower mould includes square fixed ring and lower mould insert, wherein, bottom plate top is equipped with square recess;Lower mould insert upper end is upwardly penetrated square fixed ring, and lower end is fixed in the inboard of square recess by square fixed ring;Square fixed ring is embedded in the inboard of square recess, and is fixedly connected with bottom plate by locking assembly.Square fixed ring is embedded in the inboard of square recess, and is fixedly connected with bottom plate by locking assembly.The utility model realizes "direct surface-direct surface" cooperation positioning by square recess and square fixed ring, so that the positioning stability of lower mould under high temperature, high impact working condition is higher, not easy to deviate, significantly improve the coaxiality of forging punching and product qualification rate.The technical problem that the coaxiality of forging punching is out of tolerance and the qualification rate is lower due to the positioning instability of traditional die holder is solved.

Description

Technical Field

[0001] This utility model relates to the field of forging and trimming composite mold technology, and in particular to a forging and trimming mold frame. Background Technology

[0002] Forging die holders are specialized die holder structures that use the coordinated action of upper and lower dies to clamp high-temperature forgings in a ring-like manner and simultaneously complete the punching operation. Their core function is to ensure that the forgings maintain stable positioning during the dynamic forging process under high temperature and high impact load, thereby achieving high-precision control of the punching position and ensuring the quality of subsequent processing and assembly accuracy.

[0003] like Figure 9 As shown, traditional forging die frames mostly adopt an integral lower die structure. Specifically, the lower die is positioned by cooperating with the die frame base plate through a circular groove, and is locked by multiple radial set screws distributed along the circumference to support the outer circular surface.

[0004] In the existing forging die frame structure, since the mating surface between the groove and the side of the lower die is a typical curved surface-to-curved surface fit, under the action of continuous impact and thermal shock coupling, the lower die is prone to shift in the groove, resulting in excessive coaxiality of the punching of the forging and a low product qualification rate. Utility Model Content

[0005] In view of this, this utility model proposes a forging die holder, which achieves "face-to-face" positioning through a square groove and a square fixing ring. This ensures high positioning stability of the lower die under high temperature and high impact conditions, preventing displacement and significantly improving the coaxiality of the forging punch and the product qualification rate. It solves the technical problem of excessive coaxiality and low qualification rate of forging punches caused by positioning instability in traditional die holders.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a forging die frame, including a base plate, a lower die, and a locking assembly. The lower die includes a square fixing ring and a lower die insert. The top of the base plate is provided with a square groove; The upper end of the lower mold insert extends upward through the square fixing ring, and the lower end is fixed to the inner side of the square groove by the square fixing ring. The square retaining ring is embedded in the inner side of the square groove and is fixedly connected to the base plate by the locking assembly.

[0007] Based on the above technical solutions, preferably, the square fixing ring has a through hole at the top along the vertical direction and a countersunk hole at the bottom along the vertical direction. The through hole and the countersunk hole are connected to form a stepped hole structure; One end of the lower mold insert passes through the through hole, and the other end has a flange on its outer periphery. The flange is fitted inside the countersunk hole; At least a portion of the countersunk hole side protrudes inward to form an inner platform structure; The flange side is provided with an outer platform structure that abuts and cooperates with the inner platform structure.

[0008] Based on the above technical solutions, preferably, the bottom end of the square fixing ring and the bottom end of the lower mold insert both abut against the bottom of the square groove.

[0009] Based on the above technical solutions, preferably, the locking assembly includes a pressure plate and a first clamping bolt, wherein, One end of the pressure plate is fixed to the top of the base plate by the first clamping bolt, and the other end abuts against the top of the square fixing ring.

[0010] Based on the above technical solutions, preferably, the locking assembly further includes a wedge, a second clamping bolt, and a nut, wherein, The top of the base plate is provided with a side groove for accommodating the wedge, and one side of the side groove is connected to the square groove; One end of the second clamping bolt is fixed to the bottom of the side groove, and the other end extends upward and passes through the wedge block; The nut is screwed onto the upper end of the second clamping bolt and is used to press down against the top of the wedge block; The wedge has two inclined surfaces, one of which abuts against the side end of the square fixing ring, and the other of which abuts against the groove wall of the side groove.

[0011] Based on the above technical solutions, preferably, the end of the square fixing ring that abuts against the wedge is inclined, and the side groove that abuts against the wedge is inclined.

[0012] Based on the above technical solutions, preferably, a T-shaped dovetail groove is provided horizontally along the bottom of the side groove, and a bolt head insertion groove is provided vertically at one end of the T-shaped dovetail groove. The bolt head slot and the T-shaped dovetail slot are connected; The lower end of the second clamping bolt is T-shaped and is embedded in the inner side of the T-shaped dovetail groove.

[0013] Based on the above technical solutions, preferably, the wedge block is provided with a mating hole for the second clamping bolt to pass through.

[0014] Based on the above technical solutions, preferably, a filling gap is reserved between the mating surfaces of the square fixing ring and the square groove for embedding a gasket.

[0015] Based on the above technical solutions, preferably, a corner structure is provided at the junction of two adjacent side ends of the square fixing ring.

[0016] The forging die holder of this utility model has the following advantages over the prior art: (1) By setting the upper end of the lower mold insert to pass through the square fixing ring, and the lower end to be fixed to the inside of the square groove by the square fixing ring, the square fixing ring is embedded in the inside of the square groove and fixed to the base plate by the locking component. This structure makes it easy to form a "straight face-to-straight face" fit and positioning between the square groove and the square fixing ring, which improves the positioning stability of the lower mold under high temperature impact environment, is not easy to deviate, effectively suppresses the eccentricity of punching, and significantly improves the coaxiality of forgings and the product qualification rate.

[0017] (2) By cooperating with the pressure plate and the first clamping bolt, the top of the square fixing ring is pre-tightened axially, forming a reliable vertical locking force and constituting the basic locking level, effectively preventing the mold from jumping or loosening vertically under impact load. At the same time, by setting an auxiliary locking mechanism consisting of a wedge, a second clamping bolt and a nut, a lateral clamping structure with an inclined plane is formed. The axial force applied by the nut is converted into a continuous and stable radial locking force by utilizing the principle of self-locking with an inclined plane. This dual-stage cooperative locking mechanism not only ensures that the locking force is constant for a long time, but also significantly improves the mold frame's resistance to loosening under high temperature and strong vibration conditions. It effectively overcomes the technical defects of traditional set screw locking, which is prone to pre-tightening force decay due to thermal fatigue or vibration, thereby greatly enhancing the reliability, stability and service life of the overall locking structure.

[0018] (3) By leaving a filling gap between the mating surfaces of the square fixing ring and the square groove, shims of different thicknesses can be embedded to achieve fine-tuning compensation during mold frame assembly. This structure can effectively eliminate gaps caused by machining errors, thermal deformation or wear, ensure that the lower mold is always in a precise installation position, improve positioning accuracy and consistency of repeated clamping, while maintaining high rigidity and vibration resistance, and adapting to the needs of multi-batch, high-precision production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 This is a perspective view of a forging die holder according to the present invention; Figure 2 for Figure 1 A partial 3D view; Figure 3 for Figure 2 Top view; Figure 4 for Figure 3 Sectional view along axis AA; Figure 5 for Figure 2 A partial 3D view; Figure 6 This is an exploded view of the lower tire mold; Figure 7 This is a three-dimensional view of the lower tire mold from another perspective; Figure 8 A partial 3D view of the locking component area; Figure 9 A three-dimensional view of an existing forging die holder; In the diagram: 1. Base plate; 2. Lower mold; 3. Locking assembly; 4. Guide post; 5. Upper mold; 21. Square fixing ring; 22. Lower mold insert; 31. Pressure plate; 32. First clamping bolt; 33. Wedge block; 34. Second clamping bolt; 35. Nut; 101. Square groove; 102. Side groove; 221. Flange; 1021. T-shaped dovetail groove; 1022. Bolt head insertion groove; 2101. Through hole; 2102. Countersunk hole; 2211. Outer platform structure; 3301. Inclined surface; 3302. Mating hole; 21021. Inner platform structure. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0024] 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.

[0025] 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.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0027] like Figure 1-8 As shown, a forging die frame of this utility model includes a base plate 1, a lower die 2 and a locking assembly 3. The lower die 2 includes a square fixing ring 21 and a lower die insert 22.

[0028] The base plate 1 has a square groove 101 at its top. A square fixing ring 21 extends upwards through the upper end of the lower mold insert 22, and the lower end is fixed to the inner side of the square groove 101 via the square fixing ring 21. The square fixing ring 21 is embedded in the inner side of the square groove 101 and is fixedly connected to the base plate 1 via a locking assembly 3. This structure facilitates a "straight-face" fit between the square groove 101 and the square fixing ring 21, improving the positioning stability of the lower mold 2 under high-temperature impact conditions, preventing displacement, effectively suppressing punching eccentricity, and significantly improving the coaxiality of the forgings and the product qualification rate.

[0029] Based on the above structure, the square fixing ring 21 has a through hole 2101 vertically arranged at the top and a countersunk hole 2102 vertically arranged at the bottom. The through hole 2101 and the countersunk hole 2102 communicate to form a stepped hole structure. One end of the lower mold insert 22 passes through the through hole 2101, and the outer periphery of the other end is provided with a flange 221, which is embedded in the inner side of the countersunk hole 2102. At least a portion of the side of the countersunk hole 2102 protrudes inward to form an inner platform structure 21021. Correspondingly, the side of the flange 221 is provided with an outer platform structure 2211 that abuts against the inner platform structure 21021, forming a circumferential anti-rotation fit.

[0030] This structure effectively prevents the lower mold insert 22 from rotating during the punching process, ensuring molding accuracy. At the same time, the bottom end of the square fixing ring 21 is flush with the bottom end of the lower mold insert 22 and together they abut against the bottom of the square groove 101, forming a uniform bearing surface. This ensures even stress distribution, improves the overall structural rigidity and impact resistance, and avoids deformation or loosening caused by localized stress concentration.

[0031] At the same time, this structure also facilitates the standardized design and rapid replacement of the lower mold insert 22 according to the forging specifications, realizes modular management of the mold, reduces material waste, and improves the economic efficiency and production flexibility of the mold.

[0032] Based on the above structure, the locking assembly 3 includes a pressure plate 31 and a first clamping bolt 32. One end of the pressure plate 31 is fixed to the top of the base plate 1 by the first clamping bolt 32, and the other end abuts against the top of the square fixing ring 21 to form an axial preload, thus forming a basic locking layer and effectively preventing the mold from jumping or loosening in the vertical direction.

[0033] The locking assembly 3 also includes a wedge 33, a second clamping bolt 34, and a nut 35. The top of the base plate 1 has a side groove 102 for accommodating the wedge 33, one side of which communicates with a square groove 101. One end of the second clamping bolt 34 is fixed to the bottom of the side groove 102, and the other end extends upward and passes through the wedge 33. The wedge 33 has a mating hole 3302 for the second clamping bolt 34 to pass through. The nut 35 is screwed onto the upper end of the second clamping bolt 34 and is used to press down against the top of the wedge 33. The wedge 33 has two inclined surfaces 3301, one of which abuts against the side end of the square fixing ring 21, and the other inclined surface abuts against the groove wall of the side groove 102. The end of the square fixing ring 21 that abuts against the wedge 33 is inclined, and the groove wall of the side groove 102 that abuts against the wedge 33 is also inclined.

[0034] By tightening the nut 35, the wedge block 33 is pushed down, and the axial force is converted into a lateral clamping force on the square fixing ring 21 by the inclined surface 3301, forming an inclined surface self-locking structure. Combined with the clamping action of the pressure plate 31, a two-stage locking mechanism is achieved, ensuring that the locking force is constant and lasting, significantly improving the mold frame's resistance to loosening under high temperature and strong vibration environments, and overcoming the defect of easy loosening of traditional set screws.

[0035] To further enhance the anchoring reliability of the second clamping bolt 34, a T-shaped dovetail groove 1021 is provided laterally along the bottom of the side groove 102. One end of the T-shaped dovetail groove 1021 has a bolt head insertion groove 1022 arranged vertically, and the bolt head insertion groove 1022 and the T-shaped dovetail groove 1021 are connected. The lower end of the second clamping bolt 34 is T-shaped and is embedded inside the T-shaped dovetail groove 1021, meaning the lower end of the second clamping bolt 34 can slide into the T-shaped dovetail groove 1021 via the bolt head insertion groove 1022 and be embedded therein. This structure limits the lower end of the second clamping bolt 34 within the groove, preventing it from rotating or axially shifting under high temperature or vibration, ensuring the stability and repeatability of the wedge block 33's locking action.

[0036] Based on the above structure, a filling gap is reserved between the mating surfaces of the square fixing ring 21 and the square groove 101, which can be used to embed a shim. By selecting shims of different thicknesses, the position of the lower mold 2 can be finely adjusted during assembly, effectively compensating for assembly gaps caused by machining errors, thermal deformation, or long-term wear. This ensures that the lower mold 2 is always in a precise installation position, improving positioning accuracy and consistency of repeated clamping. At the same time, the shim maintains a high rigidity connection after filling, possessing excellent vibration resistance, meeting the actual needs of multi-batch, high-precision forging production.

[0037] Based on the above structure, a corner structure is provided at the junction of two adjacent side ends of the square fixing ring 21. This corner structure is either an R-angle or a C-angle; the corner structure shown in the figure is a C-angle, i.e., a 45-degree bevel. This structure can significantly reduce stress concentration at the corners, improve the fatigue strength of the square fixing ring 21 under high-temperature alternating loads, and prevent cracking or chipping caused by stress concentration. At the same time, the corner structure makes the assembly and disassembly process smoother, reduces bump damage, and improves operational safety and mold life.

[0038] In practical applications, a pressure plate 31 is set on each of the two adjacent sides of the square groove 101. One end of each pressure plate 31 is fixed to the top of the base plate 1 by a first clamping bolt 32, and the other end presses down on the top surface of the square fixing ring 21 to form a symmetrical axial preload. A wedge block 33 is set on each of the other two adjacent sides of the square groove 101. Correspondingly, a side groove 102, a second clamping bolt 34, and a nut 35 are set on the base plate 1. This achieves a symmetrical layout of "two-sided pressure plate + two-sided wedge block". The two work together to form a spatial closed-loop locking system, ensuring that the lower mold 2 is in a precise, stable, and non-loose installation state under high temperature and high impact forging conditions. This overcomes the technical problem that traditional single-point or multi-point set screw locking is prone to mold displacement due to uneven force or preload attenuation.

[0039] In addition, the aforementioned forging and cutting die frame also includes guide posts 4 and an upper die 5. The upper die 5 is located above the base plate 1 and is used to fix the output end of the forging and cutting equipment. The base plate 1 is used to fix the worktable of the forging and cutting equipment. The base plate 1, the lower die 2, and the locking assembly 3 constitute the lower die. The guide posts 4 are vertically arranged, with their lower ends fixedly connected to the base plate 1 and their upper ends penetrating through the upper die 5, serving as guides when the upper die 5 and the lower die are closed.

[0040] The method of using the forging die holder of this utility model is as follows: First, place the lower mold insert 22 into the square groove 101. Then, slide the square fixing ring 21 from top to bottom onto the bottom of the lower mold insert 22 and embed the square fixing ring 21 into the square groove 101. During this process, align the inner platform structure 21021 and the outer platform structure 2211 vertically. Then, use the wedge block 33 to laterally press the square fixing ring 21 and the pressure plate 31 to vertically press the square fixing ring 21. After pressing, the lower mold 2 is fixed.

[0041] 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, improvements, etc., 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 forging die holder, characterized in that: The system includes a base plate (1), a lower mold (2), and a locking assembly (3). The lower mold (2) includes a square fixing ring (21) and a lower mold insert (22). The bottom plate (1) has a square groove (101) on its top. The upper end of the lower mold insert (22) extends upward through the square fixing ring (21), and the lower end is fixed to the inner side of the square groove (101) through the square fixing ring (21); The square fixing ring (21) is embedded in the inner side of the square groove (101) and is fixedly connected to the base plate (1) by the locking assembly (3).

2. The forging die holder as described in claim 1, characterized in that: The square fixing ring (21) has a through hole (2101) at the top along the vertical direction and a countersunk hole (2102) at the bottom along the vertical direction. The through hole (2101) and the countersunk hole (2102) are connected to form a stepped hole structure; One end of the lower mold insert (22) passes through the through hole (2101), and the other end has a flange (221) on its outer periphery. The flange (221) is embedded inside the countersunk hole (2102); At least a portion of the side of the countersunk hole (2102) protrudes inward to form an inner platform structure (21021). The flange (221) has an outer platform structure (2211) on its side that abuts against the inner platform structure (21021).

3. The forging die holder as described in claim 1, characterized in that: The bottom end of the square fixing ring (21) and the bottom end of the lower mold insert (22) both abut against the bottom of the square groove (101).

4. The forging die holder as described in claim 1, characterized in that: The locking assembly (3) includes a pressure plate (31) and a first clamping bolt (32), wherein, One end of the pressure plate (31) is fixed to the top of the base plate (1) by the first clamping bolt (32), and the other end abuts against the top of the square fixing ring (21).

5. A forging die holder as described in claim 4, characterized in that: The locking assembly (3) further includes a wedge (33), a second clamping bolt (34), and a nut (35), wherein, The bottom plate (1) has a side groove (102) at the top for accommodating the wedge (33), and one side of the side groove (102) is connected to the square groove (101); One end of the second clamping bolt (34) is fixed to the bottom of the side groove (102), and the other end extends upward and passes through the wedge (33). The nut (35) is screwed onto the upper end of the second clamping bolt (34) and is used to press down against the top of the wedge (33); The wedge (33) has two inclined surfaces (3301), one of which abuts against the side end of the square fixing ring (21), and the other of which abuts against the groove wall of the side groove (102).

6. A forging die holder as described in claim 5, characterized in that: The square fixing ring (21) is inclined at one end that abuts against the wedge (33), and the side groove (102) is inclined at the groove wall that abuts against the wedge (33).

7. A forging die holder as described in claim 5, characterized in that: The side groove (102) has a T-shaped dovetail groove (1021) horizontally arranged on the bottom edge of the groove, and a bolt head insertion groove (1022) is provided vertically at one end of the T-shaped dovetail groove (1021). The bolt head insertion groove (1022) and the T-shaped dovetail groove (1021) are connected; The lower end of the second clamping bolt (34) is T-shaped and is embedded in the inner side of the T-shaped dovetail groove (1021).

8. A forging die holder as described in claim 5, characterized in that: The wedge (33) is provided with a mating hole (3302) through which the second clamping bolt (34) passes.

9. A forging die holder as described in claim 1, characterized in that: A filling gap is reserved between the mating surfaces of the square fixing ring (21) and the square groove (101) for embedding the gasket.

10. A forging die holder as described in claim 1, characterized in that: The square fixing ring (21) has a corner structure at the junction of two adjacent side ends.

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