A flanging punch structure

Abstract

This utility model relates to the field of mold technology and discloses a flanging punch structure, including a fixed block, a guide block fixed on the fixed block, and a flanging punch. The flanging punch is located inside the guide block. Above the fixed block, a floating block is movably disposed between the guide block and the flanging punch and is used to eject the product. It also includes a flanging die fixed on the upper die. By adding a small-diameter boss to the top of the flanging punch, the product first contacts the boss and is pre-flanged by the boss. Then, the product is flanged a second time by using the ramp and the main rod. The effect of the two flanging operations can ensure the stability of product processing, solve the problems of flanging cracks and uneven wall thickness that are easy to occur during the flanging process, thereby reducing product defects, improving product yield and production capacity, and meeting customer needs for products.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to the field of flanging punches for product stamping, specifically a flanging punch structure. Background Technology

[0002] Dies are key tools used in industrial production to manufacture parts or products of specific shapes. Among them, stamping dies are used for operations such as punching, bending, and stretching of metal sheets. Flanging punches are key components in stamping dies that realize the folding of material edges or the flanging of holes, used to connect thin sheet materials or enhance structural strength.

[0003] A search revealed that patent application number CN201922164556.5 discloses an automatic pipe end-flanging punch, including a worktable. A placement block is welded to the top center of the worktable, and a circular hole is formed at the top center of the placement block. Reinforcing square plates are welded to the top of the worktable near both side edges. A U-shaped plate is welded to the outer surface of one side of each reinforcing square plate, and a cylinder is installed on the inner wall of one side of the U-shaped plate. This automatic pipe end-flanging punch, by placing the metal pipe end inside the circular hole and activating the cylinder, moves the clamping plates, stably clamping and fixing the metal pipe end. Simultaneously, a friction block increases the clamping friction, thus better securing the position of the metal pipe end during use. When expanding the diameter of the metal pipe end, it effectively prevents the metal pipe end from shifting, facilitating processing.

[0004] Traditional flanging punches have a simple top structure, or only chamfer the outer wall of the top of the flanging punch. That is, when stamping products, traditional flanging punches only perform flanging and forming on the product once. This flanging method is prone to problems such as flanging cracks and uneven flanging wall thickness during the flanging process, which in turn leads to product defects. Therefore, we need to propose a flanging punch structure. Utility Model Content

[0005] The purpose of this utility model is to provide a flanging punch structure. By adding a small-diameter boss to the top of the flanging punch, the product first contacts the boss and is pre-flanged by the boss. Then, the product is flanged a second time by using the ramp and the main rod. The effect of the two flanging operations can ensure the stability of product processing, solve the problems of flanging cracks and uneven wall thickness that are easy to occur during the flanging process, thereby reducing product defects, improving product yield and production capacity, meeting customer needs for products, and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flanging punch structure, comprising a fixed block, a guide block fixed on the fixed block, and a flanging punch, wherein the flanging punch is located inside the guide block, and a floating block is movably disposed above the fixed block between the guide block and the flanging punch for ejecting the product.

[0007] It also includes a flanging die fixed on the upper die, the flanging die being aligned with the flanging punch, and a clearance groove being provided at the bottom of the flanging die for the top of the flanging punch to pass through.

[0008] The top of the flanging punch is provided with a boss for pre-flanging the product, and the upper end of the outer wall of the boss is provided with an arc chamfer to scratch the bottom of the product.

[0009] Preferably, the surface of the fixing block is provided with an installation groove, the bottom of the flanging punch is fixed inside the installation groove, the bottom of the fixing block is provided with a material ejection hole for the ejector pin to pass through, and the floating block pushes the flanged product upward by the push of the ejector pin.

[0010] Preferably, the floating block is cylindrical, with an outwardly flanged edge integrally formed at the bottom, the outer wall of the floating block fitting against the inner wall of the guide block, and the inner wall of the floating block fitting against the outer wall of the flanged punch.

[0011] Preferably, the flanging punch includes a main rod body, the bottom of which is integrally formed with a base, which is fixed inside the mounting groove.

[0012] Preferably, the diameter of the main rod is greater than the diameter of the boss, and the diameter of the main rod is smaller than the diameter of the base.

[0013] Preferably, the connection between the main rod and the boss is provided with a ramp one, and the connection between the main rod and the base is provided with a ramp two.

[0014] Preferably, the lower end of the inner wall of the floating block is provided with a slanted surface to avoid interference with the slope of the flange punch.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model adds a small-diameter boss to the top of the flanging punch, allowing the product to first contact the boss and be pre-flanged by the boss. Then, the product is flanged a second time using the ramp and the main rod. The effect of the two flanging operations can ensure the stability of product processing, solve the problems of flanging cracks and uneven wall thickness that are easy to occur during the flanging process, thereby reducing product defects, improving product yield and production capacity, and meeting customer needs for products. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the flange punch of this utility model;

[0019] Figure 3 This is a schematic diagram of an existing flange punch structure.

[0020] In the diagram: 1. Fixing block; 11. Ejector hole; 12. Mounting groove; 2. Guide block; 3. Floating block; 31. Beveled surface; 4. Flanging punch; 41. Main rod body; 42. Slope one; 43. Boss; 44. Base; 45. Slope two; 5. Flanging die; 51. Relief groove. Detailed Implementation

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

[0022] Please see Figure 1-2 This utility model provides a technical solution: a flanging punch structure, including a fixed block 1, a guide block 2 fixed on the fixed block 1 and a flanging punch 4, wherein the flanging punch 4 is located inside the guide block 2, and a floating block 3 is movably arranged above the fixed block 1, located between the guide block 2 and the flanging punch 4, and used to push the product out.

[0023] The guide block 2 has an internal cavity for the floating block 3 to move up and down.

[0024] It also includes a flanging die 5 fixed on the upper die. The flanging die 5 is aligned with the flanging punch 4. The flanging die 5 and the flanging punch 4 cooperate to achieve the flanging process of the product. The bottom of the flanging die 5 is provided with a relief groove 51 for the top of the flanging punch 4 to pass through.

[0025] When the flanging die 5 moves to its lowest position (the product is squeezed between the flanging die 5 and the floating block 3), that is... Figure 1 As shown, there is a gap between the top of the flanging punch 4 and the inner top of the relief groove 51 to prevent the flanging punch 4 from hitting the inner top of the relief groove 51 and causing damage to the flanging punch 4.

[0026] A boss 43 for pre-flanging the product is provided at the top of the flanging punch 4. Through the design of the boss 43, compared with the flanging punch 4 without the boss 43 in the prior art, the pre-flanging treatment of the product can be realized. That is, the product is formed by two flangings, which can ensure the stability of the product and is not easy to crack. An arc chamfer for scratching the bottom of the product is provided at the upper end of the outer wall of the boss 43.

[0027] An installation groove 12 is provided on the surface of the fixed block 1. The bottom of the flanging punch 4 is fixed inside the installation groove 12. A ejector hole 11 for the ejector pin to pass through is provided at the bottom of the fixed block 1. The floating block 3 is pushed by the ejector pin to push the flanged product upward.

[0028] There are multiple ejector holes 11, and the multiple ejector holes 11 are arranged in an array around the installation groove 12.

[0029] A counterbore communicating with the installation groove 12 is provided at the bottom of the fixed block 1. A threaded blind hole is provided at the bottom of the flanging punch 4. One end of the bolt passes through the counterbore and is threadedly connected inside the threaded blind hole to fix the flanging punch 4.

[0030] The floating block 3 is arranged in a cylindrical shape. An outer flanging is integrally formed at the bottom of the floating block 3. That is, the vertical cross-section of the floating block 3 is in the shape of "儿". The outer wall of the floating block 3 is fitted with the inner wall of the guiding block 2, and the inner wall of the floating block 3 is fitted with the outer wall of the flanging punch 4 to ensure the stable up and down movement of the floating block 3.

[0031] The flanging punch 4 includes a main rod body 41. A base 44 is integrally formed at the bottom of the main rod body 41. The base 44 is fixed inside the installation groove 12. The threaded blind hole is provided at the bottom of the base 44.

[0032] The diameter of the main rod body 41 is larger than the diameter of the boss 43, and the diameter of the main rod body 41 is smaller than the diameter of the base 44.

[0033] A slope one 42 is provided at the connecting part of the main rod body 41 and the boss 43, and a slope two 45 is provided at the connecting part of the main rod body 41 and the base 44.

[0034] When flanging the product, the position to be flanged first contacts the boss 43, and the pre-flanging treatment of the product is realized through the boss 43. Then, the flanged part of the product moves along the outer wall of the boss 43 to the slope one 42 and moves on the slope one 42 to realize the secondary flanging of the product.

[0035] An inclined plane 31 for avoiding interference with the slope two 45 on the flanging punch 4 is provided at the lower end of the inner wall of the floating block 3. That is, through the design of the slope two 45 and the inclined plane 31, the interference between the floating block 3 and the flanging punch 4 is effectively prevented.

[0036] When in use, place the product to be processed on the guide block 2, and align the position of the product to be flanged with the flanging punch 4. Then, drive the upper die to move downward through the machine tool, which will drive the flanging die 5 to move downward, so that the flanging die 5 pushes the product downward.

[0037] During the product's downward movement, the position to be flanged first contacts the boss 43. Since the diameter of the boss 43 is smaller than the diameter of the main rod 41, the product's flanging angle is an acute angle. That is, the product's pre-flanging is achieved through the boss 43. Then, as the flanging die 5 continues to press down, the product's flanging part moves downward along the outer wall of the boss 43.

[0038] When the product's flanged part reaches the position of ramp 42, under the pressure of ramp 42 and the inner wall of the relief groove 51, the product's flanged part moves along ramp 42, and the product's flanged angle continuously increases, realizing the product's secondary flanged part; until the product's flanged part reaches the position of the outer wall of the main rod 41, the flanged operation is completed.

[0039] Finally, retract the flanging die 5, insert the ejector pin into and through the inside of the ejector hole 11, and the ejector pin abuts against the bottom of the floating block 3 (outer flanging), pushing the floating block 3 upward, so that the product after successful flanging can be pushed out.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flanging punch structure, characterized by: It includes a fixed block (1), a guide block (2) fixed on the fixed block (1) and a flanging punch (4). The flanging punch (4) is located inside the guide block (2). Above the fixed block (1), there is also a floating block (3) located between the guide block (2) and the flanging punch (4) and used to push the product out. It also includes a flanging die (5) fixed on the upper die, the flanging die (5) being aligned with the flanging punch (4), and the bottom of the flanging die (5) having a relief groove (51) for the top of the flanging punch (4) to pass through. The top of the flanging punch (4) is provided with a boss (43) for pre-flanging the product, and the upper end of the outer wall of the boss (43) is provided with an arc chamfer to scratch the bottom of the product.

2. A flanging punch structure according to claim 1, characterized in that: The surface of the fixing block (1) is provided with an installation groove (12), the bottom of the flanging punch (4) is fixed inside the installation groove (12), the bottom of the fixing block (1) is provided with a material ejection hole (11) for the ejector pin to pass through, and the floating block (3) pushes the flanged product upward by the push of the ejector pin.

3. The flanging punch structure of claim 1, wherein: The floating block (3) is cylindrical in shape. The bottom of the floating block (3) is integrally formed with an outward flange. The outer wall of the floating block (3) is attached to the inner wall of the guide block (2). The inner wall of the floating block (3) is attached to the outer wall of the flange punch (4).

4. A flanging punch structure according to claim 2, characterized in that: The flanging punch (4) includes a main rod (41), and a base (44) is integrally formed at the bottom of the main rod (41). The base (44) is fixed inside the mounting groove (12).

5. A flanging punch structure according to claim 4, characterized in that: The diameter of the main rod (41) is greater than the diameter of the boss (43), and the diameter of the main rod (41) is smaller than the diameter of the base (44).

6. A flanging punch structure according to claim 5, wherein: The connection between the main rod (41) and the boss (43) is provided with a ramp one (42), and the connection between the main rod (41) and the base (44) is provided with a ramp two (45).

7. A flanging punch structure according to claim 6, characterised in that: The lower end of the inner wall of the floating block (3) is provided with a slanted surface (31) to avoid interference with the upper slope (45) of the flange punch (4).

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