A mechanism for preventing the cutting of a piece of cloth

Abstract

The utility model discloses a kind of anti-jumping chip cutting mechanisms, it is related to stamping die field, including upper knife, pressing block, and lower knife, the pressing block is used to be pressed in lower knife on product, make the cutting part of product to be inserted into blanking groove of lower knife;Upper knife passage is passed through and set in pressing block, upper knife slides along upper knife passage, and the inner wall of upper knife passage is provided with protrusion along its length direction, and recess that is matched with the profile of protrusion is set on the surface of upper knife, the side of upper knife passage towards lower knife forms punching port, blanking groove is aligned to punching port, protrusion stops at punching port, to prevent cutting part to be moved upwards with upper knife. The utility model can effectively prevent the jumping chip caused by the upper knife with back waste, obvious effect, and simple structure can be popularized to various moulds, wide range of use.

Description

Technical Field

[0001] This utility model relates to the field of stamping dies, and specifically to an anti-chip-jumping cutting mechanism. Background Technology

[0002] In the daily stamping die processing, after the scrap is cut off by the punch, it bounces back in the direction of the punch's retraction, preventing it from falling properly into the scrap collection trough. In severe cases, it can even clog the trough. Many factors contribute to this chip bouncing, including the product's coating, the presence of oil, static electricity, etc. Therefore, it is necessary to develop an anti-chip bouncing cutting mechanism to avoid chip bouncing during high-speed stamping. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an anti-chip-jumping cutting mechanism, which effectively prevents chip jumping caused by the waste material brought back by the upper blade. The effect is obvious, the structure is simple, and it can be promoted to various molds with a wide range of applications.

[0004] The purpose of this utility model is achieved through the following technical solution: This anti-chip-jumping cutting mechanism includes an upper blade, a pressure block, and a lower blade. The pressure block is used to press the product firmly onto the lower blade, so that the part of the product to be cut extends into the material discharge groove of the lower blade. An upper blade channel is formed through the pressure block, and the upper blade slides along the upper blade channel. A protrusion is provided on the inner wall of the upper blade channel along its length direction, and a groove matching the contour of the protrusion is formed on the surface of the upper blade. A cutting opening is formed on the side of the upper blade channel facing the lower blade. The cutting opening is aligned with the material discharge groove, and the protrusion stops at the cutting opening, thereby preventing the part to be cut from moving upward with the upper blade.

[0005] As a further technical solution, a limiting step is provided on the side wall of the upper blade to cooperate with the pressure block, thereby limiting the distance the upper blade slides along the upper blade channel.

[0006] As a further technical solution, the upper tool channel is provided with a guide slope on the side opposite to the lower tool for guiding the upper tool.

[0007] As a further technical solution, the pressure block has a flange on the side facing the downward blade, which is used to embed into the material drop groove for positioning.

[0008] As a further technical solution, the pressure block has a notch on the side facing the downward blade, and the notch is connected to the cutting opening. After the product is inserted into the notch, the part to be cut is aligned with the cutting opening.

[0009] The beneficial effects of this utility model are as follows: 1. A protrusion is provided in the upper blade channel to guide the upper blade as it slides along the upper blade channel. Since the protrusion stops at the cutting edge, it can prevent the part to be cut from moving upward with the upper blade, thereby avoiding chip jumping. 2. The upper blade sidewall is equipped with a limiting step, which can limit the distance it slides downward along the upper blade channel to avoid damage to the mold due to over-punching; 3. The blanking block is equipped with a flange to cooperate with the blanking groove for positioning, which improves the blanking accuracy and prevents the whole die from shaking during blanking. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0012] Figure 3 for Figure 2 AA sectional view.

[0013] Figure 4 for Figure 3 A magnified view of a portion of region B in the middle.

[0014] Figure 5 This is a schematic diagram of the structure of the medium-pressure material block of this utility model.

[0015] Figure 6 This is a schematic diagram of the structure of the product when the pressure block is used to press it.

[0016] Figure 7 This is a schematic diagram of the cooperation structure between the upper blade and the pressure block in this utility model.

[0017] Explanation of reference numerals in the attached drawings: Upper blade 1, Groove 11, Limiting step 12, Pressing block 2, Upper blade channel 21, Guide slope 22, Protrusion 23, Flange 24, Cutting opening 25, Notch 26, Product 3, Part to be cut 31, Lower blade 4, Drop groove 41. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings: Example: As attached Figures 1-7 As shown, this anti-chip-jumping cutting mechanism includes an upper blade 1, a groove 11, a limiting step 12, a pressing block 2, an upper blade channel 21, a guide slope 22, a protrusion 23, a flange 24, a punch cut 25, a notch 26, a product 3, a part to be cut 31, a lower blade 4, and a dropping groove 41.

[0019] Reference Appendix Figure 1 , 2 3. During punching, the pressure block 2 is used to press the product 3 firmly onto the lower blade 4, so that the part 31 to be cut of the product 3 extends into the material discharge groove 41 of the lower blade 4. Preferably, as follows: Figure 4 , 5As shown, the pressure block 2 has a flange 24 on the side facing the lower blade 4. The flange 24 can be embedded in the material discharge groove 41, thereby positioning the pressure block 2 and the lower blade 4. Figure 6 , 7 As shown, the pressure block 2 has a notch 26 on the side facing the lower blade 4, and the notch 26 is connected to the cutting opening 25. When the product 3 is inserted into the notch 26, the part 31 to be cut of the product 3 is aligned with the cutting opening 25 (waiting for the upper blade 1 to cut).

[0020] like Figure 3 , 4 As shown, an upper cutting channel 21 is formed through the blanking block 2. During punching, the upper cutting tool 1 slides along the upper cutting channel 21. (See attached diagram) Figure 1 , 5 A protrusion 23 is provided on the inner wall of the upper blade channel 21 along its length direction, and a groove 11 matching the contour of the protrusion 23 is opened on the surface of the upper blade 1. When the upper blade 1 slides along the upper blade channel 21, the groove 11 is embedded in the protrusion 23, and the protrusion 23 can play a guiding role.

[0021] Reference Appendix Figure 4 , 7 The upper cutting channel 21 forms a cutting opening 25 on the side facing the lower cutting tool 4. The cutting opening 25 is aligned with the material drop groove 41. At the same time, the protrusion 23 stops at the cutting opening 25. When the product 3 is inserted into the notch 26, the protrusion 23 is above the part of the product 3 to be cut 31, thereby preventing the part to be cut 31 from moving upward with the upper cutting tool 1 (i.e., the occurrence of chip jumping).

[0022] Preferably, such as Figure 1 , 3 As shown, a limiting step 12 is provided on the side wall of the upper cutter 1. The limiting step 12 can cooperate with the pressure block 2 to limit the distance that the upper cutter 1 slides downward along the upper cutter channel 21, thereby preventing the mold from being over-punched and damaged. Figure 5 As shown, a guide slope 22 is provided on the side of the upper cutter channel 21 opposite to the lower cutter 4, so as to guide the upper cutter 1 when the punching begins.

[0023] The working process of this utility model: At the start of the blanking process, the pressure block 2 engages with the blanking groove 41 of the lower cutter 4 via the flange 24. Under the action of the pressure block 2, the product 3 is pressed down, the product 3 extends into the notch 26, and the protrusion 23 is positioned above the part of the product 3 to be cut 31 (e.g., Figure 3 , 4(As shown). During punching, the die drives the upper blade 1 to move downwards and cooperate with the lower blade 4 to cut. The upper blade 1 punches downwards along the upper blade channel 21 towards the part to be cut 31, causing the part to be cut 31 to separate from the product 3. After high-speed cutting, the upper blade 1 may bring back scrap material (the part to be cut 31) during the retraction process. Due to the design of the protrusion 23, the scrap material brought back by the upper blade 1 can be blocked, allowing the scrap material to fall downwards along the discharge groove 41, preventing chip jumping.

[0024] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A chip-prevention cutting mechanism, characterized in that: The device includes an upper blade (1), a pressing block (2), and a lower blade (4). The pressing block (2) is used to press the product (3) onto the lower blade (4), so that the part (31) to be cut of the product (3) extends into the material drop groove (41) of the lower blade (4). An upper blade channel (21) is opened through the pressing block (2). The upper blade (1) slides along the upper blade channel (21). A protrusion (23) is provided on the inner wall of the upper blade channel (21) along its length direction. A groove (11) matching the contour of the protrusion (23) is opened on the surface of the upper blade (1). A cutting opening (25) is formed on the side of the upper blade channel (21) facing the lower blade (4). The cutting opening (25) is aligned with the material drop groove (41). The protrusion (23) stops at the cutting opening (25), thereby preventing the part (31) to be cut from moving upward with the upper blade (1).

2. The anti-chip-jumping cutting mechanism according to claim 1, characterized in that: The upper blade (1) has a limiting step (12) on its side wall, which is used to cooperate with the pressing block (2) to limit the distance that the upper blade (1) slides along the upper blade channel (21).

3. The anti-chip-jumping cutting mechanism according to claim 1, characterized in that: The upper blade channel (21) is provided with a guide slope (22) on the side opposite to the lower blade (4) for guiding the upper blade (1).

4. The anti-chip-jumping cutting mechanism according to claim 1, characterized in that: The pressing block (2) has a flange (24) on the side facing the lower blade (4) for embedding into the material drop groove (41) to achieve positioning.

5. The anti-chip-jumping cutting mechanism according to claim 1, characterized in that: The pressure block (2) has a notch (26) on the side facing the lower blade (4), and the notch (26) is connected to the cutting opening (25). After the product (3) is inserted into the notch (26), the part to be cut (31) is aligned with the cutting opening (25).

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