Product cutout preform mold

Abstract

The utility model discloses a product notch part preforming die, including the punch rod of installation to the upper die plate and the die box fixed base of installation to the lower die holder, be provided with lower die box on the die box fixed base, be provided with the core -jumping guide seat in the die box fixed base, be provided with the core -jumping of the up and down movement of being able to follow punch rod insertion in the core -jumping guide seat, be provided with pre -notch female die and gasket in the lower die box, the gasket is located the below of pre -notch female die, the top of punch rod is provided with R type pre -punching cutting knife edge, R type pre -punching cutting knife edge is located the position when punch rod movement reaches the lower dead point.

Description

Technical Field

[0001] This utility model relates to the technical field of stamping equipment, specifically to a pre-forming mold for the cutout of a product. Background Technology

[0002] Stamping is a forming process that uses a press and dies to apply external force to sheet metal, strip, tube, and profile, causing plastic deformation or separation to obtain workpieces (stamped parts) of the required shape and size. The equipment that uses the stamping method is called a stamping press. Among the many components of a stamping press, the punch is just one of them. The punch, also called the punch head, is one of the core components of the stamping press and is used to stamp and form products.

[0003] Current punches generally use a single straight cut, which results in a relatively low quality of the cut surface and burrs in the final product. Deburring is required later, so improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to provide a pre-forming mold for the product cut-out section to solve the problem mentioned in the background art that the existing punches generally adopt a one-time straight cut, which results in a relatively low cut-out appearance and burr quality of the final product, requiring additional deburring later.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pre-forming mold for a product cutout, comprising a punch rod installed in an upper mold plate and a mold box fixing seat installed in a lower mold base, wherein a lower mold box is provided on the mold box fixing seat, and a jumper guide seat is provided in the mold box fixing seat, wherein a jumper is provided in the jumper guide seat and is capable of moving up and down as the punch rod is inserted, wherein a pre-cutting die and a shim are provided in the lower mold box, wherein the shim is located below the pre-cutting die, and an R-shaped pre-cutting cutter is provided above the punch rod, wherein the R-shaped pre-cutting cutter is located at the position when the punch rod moves to the bottom dead center.

[0006] Preferably, for ease of disassembly, a notch is provided below the mold box fixing base, and a mold box guide plate is provided in the notch to limit the jumper guide seat within the mold box fixing base, so that the jumper can pass through the mold box guide plate when it moves.

[0007] Preferably, in order to achieve the stamping of different products and realize the heating compensation function, the punch rod is embedded with a PTC heating element. The temperature control range of the PTC heating element is 150-300℃. The bottom of the upper template is provided with an insertion hole for electrical connection with the PTC heating element. Also preferably, in order to improve the heat insulation effect, the top of the punch rod is provided with a limiting platform that is locked in the upper template. The limiting platform is covered with a heat insulation sleeve whose outer wall abuts against the upper template.

[0008] Preferably, in order to improve the punching effect, a punching channel is provided in the pre-cut die, and an R-shaped chamfer is provided above the punching channel to cooperate with the R-shaped pre-punching blade. The upper end of the jumper core is placed in the punching channel in the initial state.

[0009] Preferably, to facilitate the disassembly and replacement of the punch rod, a sleeve is provided below the upper template, and the upper end of the punch rod is provided with a 120° inclined shoulder. The inclined shoulder is interference-fitted with the sleeve, and the interference between the inclined shoulder and the sleeve is 0.02mm. The side of the sleeve is provided with a set screw for locking the punch rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the product opening is pre-cut by the R-type pre-cutting blade before being transferred to the next process for fine blanking. By pre-cutting the product and cooperating with the subsequent fine blanking, the stability and quality of the subsequent fine blanking are further guaranteed, and the pre-cutting of the opening is finally achieved. Attached Figure Description

[0011] Figure 1 This is an exploded structural diagram of the punch and mold box fixing seat in a pre-forming mold for the product cutout section in Embodiment 1.

[0012] Figure 2 This is a schematic diagram of the structure of the punch and the mold box fixing seat after the preform of the product cut-out part in Embodiment 1 is closed;

[0013] Figure 3 for Figure 1 Enlarged view of point A;

[0014] Figure 4 for Figure 1 Enlarged view of point B;

[0015] Figure 5 This is a cross-sectional view of the punch rod in Embodiment 2;

[0016] Figure 6 This is a cross-sectional view of the punch rod in Example 3;

[0017] Figure 7 This is a cross-sectional view of the punch rod in Example 4;

[0018] Figure 8 This is a three-dimensional view of the left side structure of the sleeve in Example 4.

[0019] In the diagram: 1. Upper template; 2. Punch rod; 3. Mold box fixing seat; 4. Lower mold box; 5. Jumper core guide seat; 6. Jumper core; 7. Pre-cut die; 8. Gasket; 9. R-shaped pre-punching blade; 10. Notch; 11. Mold box guide plate; 12. PTC heating element; 13. Punching channel; 14. R-shaped chamfer; 15. Sleeve; 16. Funnel-shaped notch; 17. Shoulder; 18. Ejector screw; 19. Limiting platform; 20. Heat insulation sleeve; 11. Electrical insertion hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] 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.

[0022] Example 1

[0023] Please see Figures 1-4 As shown, this embodiment discloses a pre-forming mold for a product cutout, including a punch 2 installed in an upper mold plate 1 and a mold box fixing seat 3 installed in a lower mold base. A lower mold box 4 is provided on the mold box fixing seat 3, and a jumper guide seat 5 is provided inside the mold box fixing seat 3. A jumper 6, capable of moving up and down as the punch 2 is inserted, is provided inside the jumper guide seat 5. A pre-cutting die 7 and a gasket 8 are provided inside the lower mold box 4. The gasket 8 is located below the pre-cutting die 7, and an R-shaped groove is provided above the punch 2. The R-shaped pre-cutting cutter 9 is located at the position when the punch rod 2 moves to the bottom dead center. In this embodiment, for easy disassembly, a notch 10 is provided below the mold box fixing seat 3. A mold box guide plate 11 is provided in the notch 10 to limit the jumper guide seat 5 within the mold box fixing seat 3. The jumper 6 can pass through the mold box guide plate 11 when it moves. The mold box fixing seat 3 is fixed in the notch 10 by screws. Later, the mold box fixing seat 3 can be removed by removing the corresponding screws. Finally, the jumper guide seat 5 can be quickly disassembled.

[0024] Preferably, in order to improve the punching effect, a punching channel 13 is provided in the pre-cut die 7, and an R-shaped chamfer 14 that cooperates with the R-shaped pre-punching cutter 9 is provided above the punching channel 13. The upper end of the jumper 6 is placed in the punching channel 13 in the initial state. In order to further ensure the flatness of the punching, an R-shaped chamfer 14 that cooperates with the R-shaped pre-punching cutter 9 is provided in the punching channel 13.

[0025] In use, the punch 2 is installed into the existing upper template 1, and the mold box fixing seat 3 is installed into the existing lower mold seat. Since the punch 2 is provided with an R-shaped pre-cutting cutter 9, and the position of the R-shaped pre-cutting cutter 9 needs to be ensured to be at the position when the punch 2 moves to the bottom dead center, during operation, as the upper template 1 moves down, it drives the punch 2 to move down to the position when the punch 2 moves to the bottom dead center. The R-shaped pre-cutting cutter 9 is used to pre-cut the product opening before it is transferred to the next process for fine blanking. By pre-cutting the product and cooperating with the subsequent fine blanking, the stability and quality of the subsequent fine blanking are further ensured, and the pre-cutting of the cut part is finally achieved.

[0026] It should also be noted that other structures of the punch press and how to install this device onto the punch press are conventional techniques in the field, and therefore will not be described in detail.

[0027] Example 2

[0028] Please see Figure 5 As shown in the figure, this embodiment discloses a product cut-out preform mold. Preferably, in order to achieve the stamping of different products and realize the heating compensation function, the punch rod 2 is embedded with a PTC heating element 12. The temperature control range of the PTC heating element 12 is 150-300℃. The bottom of the upper template 1 is provided with an electrical insertion hole 20 that is electrically connected to the PTC heating element 12. Through the above structural setting, the PTC heating element 12 is used to control the punch rod 2, so that it can meet the stable requirements of stamping different products and further realize the heating compensation function.

[0029] Example 3

[0030] Please see Figure 6 As shown in the figure, this embodiment discloses a product cut-out preforming mold. Preferably, in order to improve the heat insulation effect, the top end of the punch 2 is provided with a limiting platform 18 that is stuck in the upper template 1. The limiting platform 18 is covered with a heat insulation sleeve 19 whose outer wall abuts against the upper template 1. In this embodiment, by covering the limiting platform 18 with a heat insulation sleeve 19, the problem of the upper template 1 overheating can be further avoided when the entire punch 2 is heated by the PTC heating element 12, and the heat is conducted into the upper template 1.

[0031] Example 4

[0032] Please see Figure 7 , Figure 8 As shown in the figure, this embodiment discloses a product cut-out pre-forming mold. Preferably, to facilitate the disassembly and replacement of the punch, a sleeve 15 is provided below the upper template 1, and a 120° inclined shoulder 16 is provided at the upper end of the punch 2. The inclined shoulder 16 is interference-fitted with the sleeve 15, and the interference amount between the inclined shoulder 16 and the sleeve 15 is 0.02mm. Furthermore, a set screw 17 for locking the punch 2 is provided on the side of the sleeve 15. Figure 8 As shown, a funnel-shaped notch 151 is provided on the left side of the sleeve 15 to facilitate the insertion of the punch rod 2. After the upper end of the punch rod 2 and the shoulder 16 are inserted into the funnel-shaped notch 151, both the front and rear ends of the sleeve 15 are passed through the sleeve 15 by a set screw 17, which ensures that the head of the set screw 17 is threaded to the side of the punch rod 2 to fix the punch rod 2. It also makes it convenient to disassemble and replace the punch rod 2 later.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pre-forming mold for a product cutout, comprising a punch (2) installed in an upper template (1) and a mold box fixing seat (3) installed in a lower mold base, wherein a lower mold box (4) is provided on the mold box fixing seat (3), a jumper guide seat (5) is provided inside the mold box fixing seat (3), and a jumper (6) capable of moving up and down as the punch (2) is inserted is provided inside the jumper guide seat (5), characterized in that: The lower mold box (4) is provided with a pre-cut die (7) and a shim (8). The shim (8) is located below the pre-cut die (7). An R-shaped pre-cutting cutter (9) is provided above the punch (2). The R-shaped pre-cutting cutter (9) is located at the position when the punch (2) moves to the bottom dead center.

2. The product cutout pre-forming mold according to claim 1, characterized in that: A notch (10) is provided below the mold box fixing seat (3). A mold box guide plate (11) is provided in the notch (10) to limit the jumper guide seat (5) in the mold box fixing seat (3). The jumper (6) can pass through the mold box guide plate (11) when it moves.

3. A product cutout pre-forming mold according to claim 1 or 2, characterized in that: The punch rod (2) is embedded with a PTC heating element (12), the temperature control range of the PTC heating element (12) is 150-300℃, and the bottom of the upper template (1) is provided with an electrical plug hole (20) that is electrically connected to the PTC heating element (12).

4. A product cutout pre-forming mold according to claim 1 or 2, characterized in that: The pre-cut die (7) is provided with a punching channel (13), and an R-shaped chamfer (14) that cooperates with the R-shaped pre-punching blade (9) is provided above the punching channel (13). The upper end of the jumper (6) is placed in the punching channel (13) in the initial state.

5. A product cut-out pre-forming mold according to claim 1 or 2, characterized in that: A sleeve (15) is provided below the upper template (1), and a 120° oblique shoulder (16) is provided at the upper end of the punch (2). The oblique shoulder (16) is interference-fitted with the sleeve (15), and the interference between the oblique shoulder (16) and the sleeve (15) is 0.02mm. A set screw (17) for locking the punch (2) is provided on the side of the sleeve (15).

6. The product cut-out pre-forming mold according to claim 3, characterized in that: The top of the punch (2) is provided with a limiting platform (18) that is locked inside the upper template (1), and the limiting platform (18) is covered with a heat insulation sleeve (19) whose outer wall abuts against the upper template (1).

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