A stamping die assembly for semicircular sheet metal products

Abstract

The present invention discloses a stamping die assembly for semicircular sheet metal products, characterized in that: the die assembly includes a matching punch mechanism and a die mechanism, the punch mechanism includes a fixed plate (1), a discharge pad (2) and a discharge plate (3) are sequentially arranged below the fixed plate (1), the die mechanism includes a die plate (4), a first die, a second die and a third die are arranged to match the punch mechanism and the die mechanism, the first die, the second die and the third die are all composed of a set of forming punches and forming dies, and the forming punch is arranged in the punch mechanism, and the forming dies are arranged in the die plate (4).

Description

Technical Field

[0001] The invention relates to the field of stamping dies, in particular to a stamping die assembly for semicircular sheet metal products. Background Art

[0002] Many products require circular or semicircular metal shells. Traditionally, stamping is used to produce such shells. However, due to the inherent hardness and resilience of metal parts, conventional stamping dies cannot achieve one-time stamping. Furthermore, the semicircular opening size (i.e., radius) is even more difficult to control. Therefore, multiple stamping operations are traditionally used. This involves breaking the semicircle into several stepped stamping steps, followed by final shaping. This method can require dozens or even tens of stamping operations, severely limiting the processing efficiency of such products. Therefore, a method or device that can address these issues is needed. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned deficiencies in the prior art and proposes a stamping die assembly with a simple structure, ingenious design, and reasonable layout, which can quickly, conveniently and efficiently produce semicircular sheet metal products.

[0004] The technical solution of the present invention is: a stamping die assembly for semicircular sheet metal products, characterized in that: the die assembly includes a matching punch mechanism and a die mechanism, and also includes a conveying mechanism, and the processed plate can enter the stamping die assembly under the action of the conveying mechanism, the punch mechanism includes a fixed plate 1, and a discharge pad 2 and a discharge plate 3 are sequentially arranged below the fixed plate 1, and the die mechanism includes a die plate 4, and a first die, a second die and a third die are provided to match the punch mechanism and the die mechanism, and the first die, the second die and the third die are all composed of a set of forming punches and forming die, and the forming punch is arranged in the punch mechanism, and the forming die is arranged in the die plate 4,

[0005] The first mold includes a matching first forming convex mold 5 and a first forming concave mold 6. The forming surface of the first forming convex mold 5 is a symmetrical double-arc surface structure, and the forming surfaces of the first forming convex mold 5 and the first forming concave mold 6 are toothed surfaces 7.

[0006] The second mold includes a matching second forming convex mold 8 and a second forming concave mold 9. The forming surface of the second forming convex mold 8 is a curved surface structure, and the forming surfaces of the second forming convex mold 8 and the second forming concave mold 9 are also toothed surfaces 7.

[0007] The third mold includes a matching third forming convex mold 10 and a third forming concave mold 11. The forming surface of the third forming concave mold 11 is a curved surface structure, and the forming surfaces of the third forming convex mold 10 and the third forming concave mold 11 are smooth curved surfaces.

[0008] The toothed surface 7 is provided with saw teeth, the tooth spacing of the saw teeth is d, and the angle between the teeth is ɑ, then:

[0009] d=kt,

[0010] ɑ= ,

[0011] The value range of k is 3-5, t is the thickness of the processed plate, R is the radius of the arc surface formed by the forming surface, K= ,

[0012] And the depth of the saw tooth tip pressing into the workpiece is H, then:

[0013] H=0.1-0.3t.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This type of structural stamping die assembly has a simple structure, ingenious design, and reasonable layout. It addresses the problem that traditional stamping dies cannot quickly and efficiently perform stamping operations on semicircular sheet metal parts. A special die structure is designed, which directly designs a toothed surface composed of continuous serrations on the forming surfaces of the punch and die, and adopts a pre-forming-forming-shaping method for stamping operations. It can achieve plastic deformation forming of metal sheets in fewer processing steps, and can also strictly control the shape of the sheet after stamping, increasing the stability of the formed product to prevent it from rebounding. This stamping die assembly has a simple manufacturing process and low manufacturing cost. Therefore, it can be said that it has multiple advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the first mold part in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the structure of the second mold part in an embodiment of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the third mold part in an embodiment of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the stamping state of an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 4 As shown: A stamping die assembly for semicircular sheet metal products, including a matching punch mechanism and a die mechanism, and also includes a conveying mechanism. The processed plate can enter the stamping die assembly under the action of the conveying mechanism. The punch mechanism includes a fixed plate 1, and a discharge pad 2 and a discharge plate 3 are sequentially arranged below the fixed plate 1. The die mechanism includes a concave plate 4. A first die, a second die, and a third die are provided to match the punch mechanism and the concave die mechanism. The first die, the second die, and the third die are all composed of a set of forming punches and forming concave dies, and the forming punch is arranged in the punch mechanism, and the forming concave die is arranged in the concave plate 4.

[0021] The first mold includes a matching first forming convex mold 5 and a first forming concave mold 6. The forming surface of the first forming convex mold 5 is a symmetrical double-arc surface structure, and the forming surfaces of the first forming convex mold 5 and the first forming concave mold 6 are toothed surfaces 7.

[0022] The second mold includes a matching second forming convex mold 8 and a second forming concave mold 9. The forming surface of the second forming convex mold 8 is a curved surface structure, and the forming surfaces of the second forming convex mold 8 and the second forming concave mold 9 are also toothed surfaces 7.

[0023] The third mold includes a matching third forming convex mold 10 and a third forming concave mold 11. The forming surface of the third forming concave mold 11 is a curved surface structure, and the forming surfaces of the third forming convex mold 10 and the third forming concave mold 11 are smooth curved surfaces.

[0024] The toothed surface 7 is provided with saw teeth, the tooth spacing of the saw teeth is d, and the angle between the teeth is ɑ, then: d=kt, ɑ= , K= , where the value range of k is 3-5, t is the thickness of the processed sheet, R is the radius of the arc surface formed by the forming surface, and the depth of the tooth tip pressing into the processed sheet is H, then: H=0.1-0.3t.

[0025] The working process of the stamping die assembly for semicircular sheet metal products of the embodiment of the present invention is as follows: a sheet to be processed with a thickness of t enters the stamping die under the action of the conveying mechanism. The sheet first enters the stamping station of the first die, where the first forming punch 5 and the first forming die 6 stamp the sheet into a double arc shape (similar to a W shape). Since the forming surfaces of the first forming punch 5 and the first forming die 6 are both provided with special tooth-shaped surfaces 7, the sheet can be directly plastically deformed after stamping.

[0026] The sheet moves forward a unit distance, and the part punched into a double arc shape moves to the second die, and the second forming punch 8 and the second forming die 9 perform a secondary punching on the double arc part of the semi-finished product. Since the forming surface of the second forming punch 8 is a curved surface structure, the double arc sheet can be punched into the required arc shape during the secondary punching process. Similarly, since the forming surfaces of the second forming punch 8 and the second forming die 9 are both provided with special toothed surfaces 7, the sheet can be directly plastically deformed after punching.

[0027] After the first two stamping processes, the workpiece has formed the required arc shape, but its upper and lower surfaces are serrated. The workpiece moves forward a unit distance again, and the workpiece that has become an arc moves to the third mold. The third forming punch 10 and the third forming die 11 perform a third stamping on the semi-finished arc workpiece. Since the forming surfaces of the third forming punch 10 and the third forming die 11 are smooth arc surfaces, during this stamping process, the smooth arc surfaces on the punch and die will squeeze the serrations on the upper and lower surfaces of the workpiece flat, thereby forming a smooth arc surface to obtain the final required arc product.

[0028] When the first die is stamped, the W-shaped preliminary forming of the workpiece is first achieved. At this time, the opening size of the workpiece is outward. When the second die is stamped, the stamping position is located in the middle part of the W-shaped workpiece to achieve a semicircular stamping operation. Therefore, the opening size of the workpiece is inward. In this way, the opening part of the final arc-shaped workpiece will have an inward contraction trend, which can offset the rebound tendency of the material, thereby better controlling the opening size of the arc-shaped workpiece.

[0029] At the same time, since the forming surfaces 7 of the first mold and the second mold are both toothed surfaces, the serrated parts on the molds engage with each other, and the workpiece is also punched into a serrated shape. This method can effectively eliminate the stress of the material itself, thereby achieving plastic deformation of the material and increasing stability, thereby further ensuring the shape and size after stamping.

Claims

1. A stamping die assembly for semi-circular sheet metal products, characterized by: The die assembly includes a matching punch mechanism and a die mechanism, and also includes a conveying mechanism. The processed plate can enter the stamping die assembly under the action of the conveying mechanism. The punch mechanism includes a fixed plate (1), and a discharge pad (2) and a discharge plate (3) are sequentially arranged below the fixed plate (1). The die mechanism includes a die plate (4). A first die, a second die, and a third die are arranged to match the punch mechanism and the die mechanism. The first die, the second die, and the third die are all composed of a set of forming punches and forming die plates, and the forming punch is arranged in the punch mechanism, and the forming die is arranged in the die plate (4). The first mold comprises a matching first forming convex mold (5) and a first forming concave mold (6), the forming surface of the first forming convex mold (5) is a symmetrical double-arc surface structure, and the forming surfaces of the first forming convex mold (5) and the first forming concave mold (6) are tooth-shaped surfaces (7). The second mold comprises a matching second forming convex mold (8) and a second forming concave mold (9), the forming surface of the second forming convex mold (8) is a curved surface structure, and the forming surfaces of the second forming convex mold (8) and the second forming concave mold (9) are also tooth-shaped surfaces (7). The third mold comprises a matching third forming convex mold (10) and a third forming concave mold (11), the forming surface of the third forming concave mold (11) is a curved surface structure, and the forming surfaces of the third forming convex mold (10) and the third forming concave mold (11) are smooth curved surfaces. The toothed surface (7) is provided with saw teeth, the tooth spacing of the saw teeth is d, and the angle between the teeth is ɑ, then: d=kt, ɑ= , The value range of k is 3-5, t is the thickness of the processed plate, R is the radius of the arc surface formed by the forming surface, K= , And the depth of the saw tooth tip pressing into the workpiece is H, then: H=0.1-0.3t.

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