Center drill for machining die-casting die

Abstract

The utility model discloses a center drill for machining a die-casting die, which comprises a center drill body, the center drill body consists of two drill bits and a handle part, the two drill bits are symmetrically arranged at two ends of the handle part, and a stable machining structure is arranged on the center drill body; the stable machining structure comprises a connecting structure used for connecting the drill bit and the handle part and a cutting structure used for machining. The connecting structure is arranged between the drill bit and the handle part, and the cutting structures are arranged at the two ends of the center drill body. By means of the mode, the center drill used for machining the die-casting die is of a stable machining structure, the stability of the center drill in the machining process can be improved, and therefore the machining precision is guaranteed, and the product quality is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould processing field especially is related to a center drill for processing die casting mould. BACKGROUND

[0002] The center drill is a tool specially designed for drilling a center hole on a workpiece, which plays an important role in machining, especially in subsequent drilling or cutting operations, to ensure accurate positioning of the hole and improve machining accuracy. When processing die casting moulds, the center drill is one of the important tools, mainly used for punching and positioning to ensure the accuracy of subsequent processing.

[0003] The traditional center drill has poor stability during processing, and the die steel after heat treatment is prone to wear, and the precision is difficult to guarantee. UTILITY MODEL CONTENT

[0004] The utility model mainly solves the technical problem that provides a center drill for processing die casting mould, can increase the stability when center drill processing.

[0005] To solve the above technical problems, one technical scheme of the utility model is provided: a center drill for processing die casting mould, comprising a center drill body, the center drill body is composed of two drill bits and a handle, two drill bits are symmetrically installed at both ends of the handle, and a stable processing structure is arranged on the center drill body.

[0006] The stable processing structure comprises a connecting structure for connecting the drill bit and the handle and a cutting structure for processing.

[0007] The connecting structure is arranged between the drill bit and the handle, and the cutting structure is arranged at both ends of the center drill body.

[0008] In a preferred embodiment of the utility model, the connecting structure comprises a taper seat, the large diameter end of the taper seat is fixedly connected with the handle, and the small diameter end of the taper seat is fixedly connected with the drill bit.

[0009] In a preferred embodiment of the utility model, the taper seat angle of the taper seat is 90°.

[0010] In a preferred embodiment of the utility model, the cutting structure comprises a plurality of center cutting edges, a plurality of side cutting edges and a plurality of chip removal grooves, the center cutting edges are connected with the side cutting edges, the side cutting edges are connected with one side of the chip removal groove, and the spiral angle of the chip removal groove is 36°.

[0011] In a preferred embodiment of the utility model, the number of the center cutting edges, the side cutting edges and the chip flutes is the same, the number of the center cutting edges is two, and the two center cutting edges are symmetrically arranged on the drill bit with the shaft center of the drill bit.

[0012] In a preferred embodiment of the utility model, the drill bit angle of the drill bit is 140°.

[0013] The utility model discloses a center drill for machining die-casting die, which adopts a stable machining structure, can increase the stability during machining of the center drill, thereby ensuring machining precision and greatly improving product quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of a center drill for machining die-casting die.

[0015] The labels of components in the drawings are as follows: 1, drill bit; 2, shank; 3, taper seat; 4, center cutting edge; 5, side cutting edge; 6, chip flute; 7, taper clamping angle; 8, drill bit clamping angle; 9, spiral angle. DETAILED DESCRIPTION

[0016] The preferred embodiments of the utility model are described in detail below, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0017] According to Figure 1 A center drill for machining die-casting die, comprising a center drill body, the center drill body is composed of two drill bits 1 and a shank 2, the two drill bits 1 are symmetrically installed at two ends of the shank 2, a stable machining structure is arranged on the center drill body, which can increase the stability during machining of the center drill, thereby ensuring machining precision and greatly improving product quality, in the embodiment, the length of the center drill body is 150mm, the length of the drill bit 1 is 3±0.1mm, the drill bit diameter of the drill bit 1 is The shank diameter of the shank 2 is

[0018] In the embodiment, the center drill body is made of hard alloy material, which replaces the white steel material of the traditional center drill with hard alloy material, so that the die steel after heat treatment is not easy to wear, thereby further ensuring the machining precision.

[0019] The stable machining structure comprises a connecting structure for connecting the drill bit 1 and the shank 2 and a cutting structure for machining, the connecting structure is arranged between the drill bit 1 and the shank 2, and the cutting structure is arranged at two ends of the center drill body.

[0020] The connecting structure comprises a taper portion 3, the large diameter end of the taper portion 3 is fixedly connected with the shank portion 2, and the small diameter end of the taper portion 3 is fixedly connected with the drill bit 1, and the taper portion 3 is generally used for cooperating with the corresponding taper hole of the machine tool spindle or clamp to realize reliable clamping.

[0021] The taper clamping angle 7 of the taper portion 3 is 90°, the taper clamping angle 7 of 90° provides good clamping force and ensures the stability of the center drill in the machining process, which can effectively resist the cutting force generated in the machining process, reduce the vibration of the center drill, make the center drill easier to center during installation, thereby improving the clamping precision, being suitable for various machining occasions, being capable of effectively guiding the cuttings to be discharged outward, reducing the interference of the cuttings on the cutting process, and thereby improving the machining efficiency.

[0022] The cutting structure comprises a plurality of center cutting edges 4, a plurality of side cutting edges 5 and a plurality of chip removal grooves 6, the center cutting edges 4 are connected with the side cutting edges 5, and the side cutting edges 5 are connected with one side of the chip removal grooves 6.

[0023] In the embodiment, the spiral angle 9 of the chip removal groove 6 is 36°, the spiral angle 9 refers to the included angle between the spiral shape of the chip removal groove 6 and the center drill axis, and reasonable spiral angle 9 can effectively improve the cutting performance and chip removal efficiency, and for materials with high hardness, a larger spiral angle 9 (such as 30°-45°) can help better chip removal.

[0024] The number of the center cutting edges 4, the side cutting edges 5 and the chip removal grooves 6 is the same, in the embodiment, the number of the center cutting edges 4 is two, and the two center cutting edges are symmetrically arranged on the drill bit 1 with the axis of the drill bit 1 as the center.

[0025] The drill bit clamping angle 8 of the drill bit 1 is 140°, compared with the conventional 118° or 135° angle, the drill bit clamping angle 8 of 140° can effectively reduce the cutting force, which helps to reduce the load on the machine tool and the center drill during machining, thereby reducing wear and tear and improving the service life of the center drill.

[0026] Compared with the prior art, the center drill for machining die-casting molds adopts a stable machining structure, can increase the stability of the center drill during machining, thereby ensuring the machining precision and greatly improving the product quality.

[0027] In the application, the style of the conventional center drill is used on the hard alloy, and some key parameters are changed according to the machining needs to ensure the machining stability.

[0028] In the description of the utility model, it is necessary to explain that the components are all general standard components or components known by the person skilled in the art, the structure and principle thereof are all known by the person skilled in the art through technical manual or known through conventional test method, the orientation or position relation indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, or the orientation or position relation commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0029] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A center drill for machining die-casting molds, comprising a center drill body, the center drill body being composed of two drill bits and a shank, the two drill bits being symmetrically mounted at both ends of the shank, characterized in that, The central drill body is equipped with a stabilizing machining structure; The stabilizing machining structure includes a connection structure for connecting the drill bit and the shank, and a cutting structure for performing machining. The connecting structure is disposed between the drill bit and the shank, and the cutting structure is disposed at both ends of the central drill body.

2. The center drill for machining die-casting molds according to claim 1, characterized in that, The connection structure includes a cone seat, the large-diameter end of which is fixedly connected to the shank, and the small-diameter end of which is fixedly connected to the drill bit.

3. The center drill for machining die-casting molds according to claim 2, characterized in that, The cone angle of the cone seat is 90°.

4. The center drill for machining die-casting molds according to claim 1, characterized in that, The cutting structure includes several central cutting edges, several side cutting edges, and several chip removal grooves. The central cutting edges are connected to the side cutting edges, and the side cutting edges are connected to one side of the chip removal grooves. The helix angle of the chip removal grooves is 36°.

5. A center drill for machining die-casting molds according to claim 4, characterized in that, The number of the central cutting edge, the side cutting edge, and the chip removal groove are the same, and there are two central cutting edges, which are symmetrically arranged on the drill bit about the axis of the drill bit.

6. A center drill for machining die-casting molds according to claim 1, characterized in that, The drill bit has a drill bit angle of 140°.

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