Cutting tool suitable for high-strength anti-collision beam

Abstract

A cut-off tool suitable for a high-strength anti-collision beam comprises a connecting plate, a tool body and an insert, one end of the connecting plate is provided with a connecting hole and a positioning pin hole, the connecting plate is connected with a power mechanism, the other end of the connecting plate is provided with a protruding circular connector, one end of the tool body is provided with a circular hole, the circular hole is matched with the circular connector, and the insert is inserted into the circular hole. The cutting edge at one end of the cutter body is arranged to be in an inverted triangle shape, the two inserts are respectively fixed on two inclined planes of the cutting edge, and the cutter head at the lowest end of the cutting edge is arranged to be an arc blunt head. The cut-off tool is designed in a split mode, the insert groove and the insert are arranged on the tool body, the insert groove is provided with the limiting edge and the transition section, the insert and the tool body are reliably connected and stably used, the strength of the insert is high, and the overall service life of the cut-off tool is prolonged.

Description

Technical Field

[0001] The utility model relates to a cutter, in particular to a cutting cutter suitable for high-strength anti-collision beams. Background Art

[0002] With the increasing use of lightweight automotive parts, the application of ultra-high-strength steel B-type automotive anti-collision beams with a tensile strength of more than 1500MPa in automobiles has also gradually increased. This type of anti-collision beam is usually produced continuously on a roller-pressed production line, and the parts are cut by a blade punching method. Due to the high strength of the steel strip material, it is difficult for the tool to cut during cutting, and the service life of traditional cutting knives is short. At present, if a conventional cutting knife punches less than 150 pieces continuously, the cutting knife needs to be sharpened or scrapped and replaced. The existing cutting knife structures are all integrated structures, such as Patent 202320192807.4, whose cutting blade is an integrated structure, and the overall blade price is relatively high. The punching of the B-type high-strength steel roller-pressed anti-collision beam product has a large impact, the blade body will vibrate, the cutting edge is prone to chipping and breaking, and the side of the cutting knife is easily scratched, making the entire blade unusable and requiring overall replacement, which is costly. Utility Model Content

[0003] The utility model is to overcome the disadvantages of the prior art and provide a cutting tool suitable for high-strength anti-collision beams. The cutting tool has a split design, and an insert groove and an insert are provided on the blade. The insert groove is designed with a limiting edge and a transition section. The insert is reliably connected to the blade body, is stable in use, and has high insert strength, which extends the overall service life of the cutting tool.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A cutting tool suitable for high-strength anti-collision beams, the cutting tool comprising a connecting plate, a blade body and an insert, one end of the connecting plate being provided with a connecting hole and a positioning pin hole being connected to a power mechanism, the other end being provided with a raised circular connecting head, one end of the blade body being provided with a circular hole being matched with and connected to the circular connecting head, the cutting edge at the other end of the blade body being provided with an inverted triangle shape, two inserts being provided, respectively fixed on the two inclined surfaces of the cutting edge, and the cutting head at the lower end of the cutting edge being provided with a blunt arc head.

[0006] The above-mentioned cutting tool suitable for high-strength anti-collision beams has an insert groove provided on the inclined surface of the cutting edge, and the insert is interference-fitted in the insert groove.

[0007] The above-mentioned cutting tool is suitable for high-strength anti-collision beams. The groove wall of the insert groove includes a section a, b section, c section and d section connected in sequence. The angle α at the connection between section a and section b is 84~85.5°, the angle β formed by section d and section b is 84~85.5°, and the angle γ between section c and the extension line of section b is 18~20°. Angle α is equal to angle β.

[0008] The above-mentioned cutting tool is suitable for high-strength anti-collision beams, and the insert is made of cold-working die steel.

[0009] The beneficial effects of the present invention are as follows: the cutting edge of the blade of the present invention is set as an inclined surface, and an insert groove for assembling the insert is set on the inclined surface, and the insert groove is set as a limiting edge (segments a, b and d) for the movement of the photo paper insert, and a transition section (segment c), so that the insert is reliably connected to the blade body and is stable to use, and the transition section can disperse and transmit the impact force during the cutting process. The insert and the blade body are assembled by hot pressing, with an interference fit, so that the blade is less impacted during the punching process and has better durability. The cutting knife insert adopts cold-working die steel with high hardness, high strength and high wear resistance, so the overall life of the cutting knife is longer and the cutting effect is better. The tool of the present invention adopts a split structure, which makes it easier to replace the blade body and saves costs. The cutting tool of the present invention is suitable for online cutting of B-type anti-collision beam products with a tensile strength of 1500Mpa and above. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] Figure 1 This is a schematic diagram of the front structure of the tool of the utility model;

[0012] Figure 2 It is a schematic diagram of the enlarged structure of the insert slot;

[0013] Figure 3 This is a schematic diagram of the structure of the tool when it is assembled and used;

[0014] Figure 4 Schematic diagram of the structure of the tool cutting anti-collision beam.

[0015] In the figure: 1, connecting plate; 1-1, circular connector; 2, blade body; 2-1, cutting edge; 2-2, blade head; 2-3, insert groove; 3, insert. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] See Figure 1 and Figure 2The utility model tool is set as a split structure, including a connecting plate 1, a blade 2 and an insert 3. The upper end of the connecting plate is connected to the power mechanism (hydraulic cylinder, not shown) through a connecting hole and a positioning pin hole. The lower end is provided with a raised circular connecting head 1-1, which is matched with the circular hole at the upper end of the blade 2. The lower end of the blade is provided with an inverted triangular cutting edge 2-1. The two inclined surfaces of the cutting edge are used to push out the cut waste when cutting the material. The two inclined surfaces are provided with an insert groove 2-3. The insert groove is interference-fitted with the insert 3. The invention comprises a segment a, a segment b, a segment c, and a segment d, connected in sequence. The angle α at the junction of segment a and segment b is 84-85.5°, and the angle β formed by segment d and segment b is 84-85.5°. The angles α and β are equal, and the setting of angles α and β is used to limit the movement and fall off of the insert in the direction perpendicular to the cutting edge during the cutting process. The angle γ between segment c and the extension of segment b is 18-20°. This transition section design can effectively disperse the force exerted on the insert during the punching process and transfer it to the blade body, avoiding stress concentration at the sharp corner that may cause fracture. The blade tip 2-2 at the lowest end of the cutting edge is designed as a blunt arc tip. During cutting, the blade tip corresponds to the product part mainly in the welding area, where the material is significantly hardened by welding. If the blade tip has a pointed structure, it is prone to chipping.

[0018] The insert 3 is made of cold-working die steel with high hardness, strength and wear resistance, with a material hardness of HRA92-94. The insert 3 and the blade body 2 are fitted with an interference fit, and the two are tightly connected, so the overall performance of the cutter is excellent.

[0019] Anti-collision beam cutting process: see Figure 3 and Figure 4 , Ⅰ is the cutting tool, Ⅱ is the cutting static knife, Ⅲ is the B-type anti-collision beam. Under the thrust of the hydraulic cylinder, the cutting tool Ⅰ moves along the cutting static knife Ⅱ and cuts downward into the B-type anti-collision beam Ⅲ. A rectangular cutting process hole Ⅳ is designed on the B-type anti-collision beam Ⅲ, which is easy for the cutting tool to cut into. When the cutting knife cuts into the workpiece, the insert on the cutting edge first contacts the workpiece. After cutting, the other cutting edge areas of the cutter body cut into the product as a whole.

Claims

1. A cutting tool suitable for high-strength anti-collision beams, characterized by: The cutting tool comprises a connecting plate (1), a blade body (2) and an insert (3); one end of the connecting plate (1) is provided with a connecting hole and a positioning pin hole, which is connected to a power mechanism; the other end is provided with a raised circular connecting head (1-1); one end of the blade body (2) is provided with a circular hole, which is matched with and connected to the circular connecting head (1-1); the cutting edge (2-1) at the other end of the blade body (2) is provided in an inverted triangle shape; two inserts (3) are provided, which are respectively fixed on the two inclined surfaces of the cutting edge; the cutting head (2-2) at the lower end of the cutting edge is provided in a blunt arc shape.

2. The cutting tool for high-strength anti-collision beams according to claim 1, characterized in that: An insert groove (2-3) is provided on the inclined surface of the cutting edge (2-1), and the insert (3) is interference fitted in the insert groove (2-3).

3. The cutting tool for high-strength anti-collision beams according to claim 2, characterized in that: The slot wall of the insert slot (2-3) comprises a segment a, a segment b, a segment c and a segment d connected in sequence, wherein the angle α at the connection between segment a and segment b is 84-85.5°, the angle β formed by segment d and segment b is 84-85.5°, the angle γ between segment c and the extension line of segment b is 18-20°, and angle α is equal to angle β.

4. The cutting tool for high-strength anti-collision beams according to claim 1, characterized in that: The insert is made of cold working die steel.

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