Drilling apparatus

Abstract

This application relates to the field of machining equipment technology, aiming to solve the problem of improving the machining accuracy of drilling equipment for fine and deep holes. It provides a drilling device including a machine spindle assembly, a clamping assembly, and a gun drill. The machine spindle assembly has a central water outlet channel. The clamping assembly is used to clamp the target workpiece to be drilled. One end of the gun drill is connected to the machine spindle assembly, and the other end of the gun drill is used to extend into the target workpiece. The gun drill has a water outlet hole communicating with the central water outlet channel. The beneficial effect of this application is that by combining the gun drill with the machine spindle assembly, the central water outlet function of the machine spindle assembly is used to supply coolant to the gun drill. Furthermore, due to the linear structure of the gun drill, it is easy to increase the diameter of the water outlet hole, resulting in a larger water flow rate under the same pressure, thereby improving chip removal capacity and contributing to improved drilling accuracy.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, and more specifically, to drilling equipment. Background Technology

[0002] A drilling apparatus is provided in the related art, which drills holes in a target part using a drill bit. However, the drilling accuracy of the drilling apparatus in the related art is low when machining deep holes. Utility Model Content

[0003] This application provides drilling equipment to address the problem of how to improve the machining accuracy of drilling equipment in processing fine and deep holes.

[0004] Embodiments of this application provide a drilling apparatus, including a machine spindle assembly, a clamping assembly, and a gun drill. The machine spindle assembly has a central water outlet channel. The clamping assembly is used to clamp the target part to be drilled. One end of the gun drill is connected to the machine spindle assembly, and the other end of the gun drill is used to extend into the target part. The gun drill has a water outlet hole communicating with the central water outlet channel.

[0005] The aforementioned drilling equipment combines a gun drill with the machine spindle assembly to deliver coolant to the gun drill using the central water outlet function of the machine spindle assembly. Furthermore, because the gun drill has a linear structure, it is easy to increase the diameter of the water outlet hole, resulting in a larger water flow rate under the same pressure. This improves chip removal capability and helps to improve drilling accuracy.

[0006] In one embodiment, the gun drill includes a drill shank and a drill bit. One end of the drill shank is connected to the machine spindle assembly, one end of the drill bit is connected to the end of the drill shank away from the machine spindle assembly, and the other end of the drill bit is used to extend into the target part. A water outlet hole extends through both the drill shank and the drill bit.

[0007] In one embodiment, the drill bit is provided with a V-groove. The V-groove extends along the extension direction of the gun drill and passes through the end of the drill bit away from the drill shank.

[0008] In one embodiment, the cross-sectional shape of the water outlet is configured as an arc extending circumferentially along the drill bit.

[0009] In one embodiment, the diameter of the water outlet is smaller than the radial dimension of the central water outlet channel.

[0010] In one embodiment, the drilling equipment further includes a tool holder assembly. The tool holder assembly is connected between the machine spindle assembly and the gun drill, and the tool holder assembly has a flow channel, the two ends of which are respectively connected to a central water outlet channel and a water outlet hole.

[0011] In one embodiment, the diameter of the flow channel connected to one end of the central water outlet channel is larger than the diameter of the flow channel connected to the end of the water outlet hole; and / or, the diameter of the flow channel is larger than the diameter of the water outlet hole.

[0012] In one embodiment, the end of the gun drill near the machine spindle assembly passes through the tool handle assembly.

[0013] In one embodiment, one end of the handle assembly passes through the central water outlet channel.

[0014] In one embodiment, the clamping assembly includes a base and a clamping member connected to the base, defining an installation channel between the clamping member and the base for the target member to pass through, the clamping member being used to clamp the target member against the base. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a drilling apparatus according to an embodiment of the present application (the target component is also shown in the figure).

[0017] Figure 2 for Figure 1 A cross-sectional view of the drilling equipment in the illustrated embodiment.

[0018] Figure 3 for Figure 1 A perspective view of the gun drill in the illustrated embodiment.

[0019] Figure 4 for Figure 2 A partial enlarged view of the drilling equipment in the illustrated embodiment.

[0020] Figure 5 for Figure 1 A schematic diagram showing the disassembled state of the clamping assembly and the target component in the illustrated embodiment.

[0021] Explanation of key component symbols: Drilling equipment 100 Machine spindle assembly 10 Central water outlet channel 10a Clamping component 20 Installation channel 20a Base 21 Clamping component 22 Gun drill 30 Water outlet 30a Drill shank 31 Drill bit 32 V-groove 32a Knife handle assembly 40 Flow channel 40a Target part 200 The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Example Figure 1 This is a perspective view of a drilling apparatus 100 according to an embodiment of this application (the target component 200 is also shown in the figure). Figure 2 for Figure 1 A cross-sectional view of the drilling equipment 100 in the illustrated embodiment.

[0027] See Figure 1 and Figure 2This embodiment provides a drilling device 100, including a machine spindle assembly 10, a clamping assembly 20, and a gun drill 30. The machine spindle assembly 10 has a central water outlet channel 10a, and the clamping assembly 20 is used to clamp the target part 200 to be drilled. One end of the gun drill 30 is connected to the machine spindle assembly 10, and the other end of the gun drill 30 is used to extend into the target part 200. The gun drill 30 has a water outlet hole 30a communicating with the central water outlet channel 10a.

[0028] The aforementioned drilling equipment 100 combines the gun drill 30 with the machine spindle assembly 10 to deliver coolant to the gun drill 30 using the central water outlet function of the machine spindle assembly 10. Since the gun drill 30 has a linear structure, it is easy to increase the diameter of the water outlet 30a, so that the water flow rate of the gun drill 30 is greater under the same pressure, thereby improving the chip removal capacity and improving the drilling accuracy.

[0029] Figure 3 for Figure 1 A perspective view of the gun drill 30 in the illustrated embodiment.

[0030] In some embodiments, such as Figure 3 As shown, the gun drill 30 includes a drill shank 31 and a drill bit 32, combined with... Figure 2 As shown, one end of the drill shank 31 is connected to the machine spindle assembly 10, and one end of the drill bit 32 is connected to the end of the drill shank 31 away from the machine spindle assembly 10. The other end of the drill bit 32 is used to extend into the target part 200. Water outlet holes 30a pass through both the drill shank 31 and the drill bit 32. This allows the gun drill 30 to be constructed in a slender shape to machine deep holes in the target part 200, and the connection between the gun drill 30 and the machine spindle assembly 10 via the drill shank 31 improves the connection stability between the gun drill 30 and the machine spindle assembly 10.

[0031] In some embodiments, the drill bit 32 is provided with a V-groove 32a, which extends along the extension direction of the gun drill 30 and passes through the end of the drill bit 32 away from the drill shank 31. In this way, the chips are guided out of the drill bit 32 by the V-groove 32a, further improving the machining accuracy of fine and deep holes.

[0032] In some embodiments, the cross-sectional shape of the water outlet 30a is configured as an arc extending circumferentially along the drill bit 32, so that the cross-sectional shape of the water outlet 30a is adapted to the shape of the drill bit 32 with the V-groove 32a, thereby increasing the cross-sectional area of ​​the water outlet 30a and improving the chip removal capacity.

[0033] Figure 4 for Figure 2 A partial enlarged view of the drilling equipment 100 in the illustrated embodiment.

[0034] In some embodiments, such as Figure 4As shown, the diameter of the water outlet 30a is smaller than the radial dimension of the central water outlet channel 10a, so as to increase the flow rate of the coolant in the water outlet 30a, improve the scouring force of the coolant impacting the cutting zone, and enable the high-pressure coolant to penetrate into the tiny gap between the drill bit 32 and the target part 200, thereby reducing the wear of the drill bit 32 and the generation of cutting heat.

[0035] In some embodiments, the drilling equipment 100 further includes a tool holder assembly 40. The tool holder assembly 40 is connected between the machine spindle assembly 10 and the gun drill 30. The tool holder assembly 40 has a flow channel 40a, with its two ends communicating with a central water outlet channel 10a and a water outlet hole 30a, respectively. This facilitates power transmission, resolves potential incompatibility issues between the machine spindle assembly 10 and the gun drill 30, improves connection stability, and ensures coaxiality accuracy.

[0036] In some embodiments, the aperture of the flow channel 40a connected to one end of the central water outlet channel 10a is larger than the aperture of the flow channel 40a connected to the end of the water outlet hole 30a, so as to realize the transition from the central water outlet channel 10a to the water outlet hole 30a.

[0037] In some embodiments, the aperture of the flow channel 40a is larger than the aperture of the outlet hole 30a to further increase the flow rate of the coolant in the outlet hole 30a.

[0038] In some embodiments, one end of the gun drill 30 near the machine spindle assembly 10 is inserted into the tool holder assembly 40 so as to axially and radially position the gun drill 30 through the tool holder assembly 40, reduce the shaking of the gun drill 30, and ensure the coaxiality of the gun drill 30 and the tool holder assembly 40.

[0039] In some embodiments, one end of the tool handle assembly 40 passes through the central water outlet channel 10a to ensure the coaxiality of the tool handle assembly 40 and the central water outlet channel 10a, as well as the stability and sealing of the connection between the tool handle assembly 40 and the machine tool spindle assembly 10.

[0040] Figure 5 for Figure 1 A schematic diagram showing the exploded state of the clamping assembly 20 and the target component 200 in the illustrated embodiment.

[0041] In some embodiments, such as Figure 5 As shown, the clamping assembly 20 includes a base 21 and a clamping member 22 connected to the base 21. The clamping member 22 and the base 21 define an installation channel 20a through which the target part 200 passes. The clamping member 22 is used to press the target part 200 against the base 21 to ensure that the target part 200 is fixed in position, accurate in posture, and does not deform under force during processing. This fundamentally avoids drilling accuracy deviations caused by the movement, shaking, or deformation of the target part 200, while ensuring processing safety and efficiency.

[0042] In some embodiments, there are at least two clamping members 22, which are spaced apart along the extension direction of the gun drill 30 to apply uniform clamping force from two points in the axial direction of the target part 200, thereby completely restricting the axial movement and radial warping of the target part 200. This is especially useful for target parts 200 with long axial dimensions, such as long strips and shafts, to avoid deformation of the target part 200 or deviation in hole accuracy caused by uneven force during drilling, while also improving processing stability.

[0043] The aforementioned drilling equipment 100 operates using a cutting-edge drilling method. The gun drill 30 makes a small feed advance followed by a small retraction, repeating this process until a hole is drilled in the target part 200. For example, it drills 1 mm down, then retracts 1 mm, and then advances and retracts again, without exiting the hole during the drilling process. This method, combined with the chip removal capability of the gun drill 30, improves drilling efficiency and drilling quality.

[0044] Pre-machining tool inspection: Inspect the cutting edge of the gun drill 30 for chipping defects and wear; check the internal cooling channels of the drill bit 32 for unobstructed airflow; confirm the straightness of the gun drill 30 is within the required range on the platform; clamp the drill bit 32 using the tool holder assembly 40 and then mount it on the machine spindle assembly 10; use a gauge to confirm that the dynamic runout of the cutting edge of the gun drill 30 drill bit 32 is less than 0.2 mm; turn on the cutting fluid in an open area directly below the drill bit 32 without any interference, and test the outlet pressure of the coolant in the drill bit 32. During machining, use an end mill to machine a 10 mm deep pilot hole for the drill bit 32; use a drill bit 32 with an effective cutting edge length of 95 mm to machine an 80 mm deep pilot hole; use a CNC (Computerized Numerical Control) gun drill 30 with an effective chip flute length of 300 mm for deep hole machining. Optionally, the gun drill 30, with a spindle speed of S=0 and the high-pressure internal cooling cutting fluid off, slowly moves above the target part 200 to a position directly above the opening of the deep hole to be machined; the Z-axis slowly descends to a position 1 mm above the opening, and then executes the program in single-stage mode, slowly descending to -10 mm in G01 mode. During the descent, the operator uses auxiliary tools to touch the tip of the drill bit 32 as needed to ensure that the drill bit 32 smoothly enters the hole; the spindle speed is increased to S=50 revolutions per minute, and the Z-axis depth is continued to descend to -75 mm in G01 mode; the spindle speed is increased to S=3500 revolutions per minute, and drilling is performed in G01 mode. When the drilling depth reaches the specified depth, the spindle speed is adjusted to S=10 revolutions per minute, and the tool is retracted to the surface of the target part 200 in G01 mode.

[0045] Thus, this embodiment provides a CNC five-axis machining technology for fine and deep hole features of semiconductor device parts. By optimizing the key influencing factors and detail processing methods for fine and deep hole machining, it achieves fine and deep hole machining with a high aspect ratio.

[0046] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A drilling apparatus, characterized by, include: The machine tool spindle assembly is equipped with a central water outlet channel; Clamping assembly, used to clamp the target part to be drilled; as well as, A gun drill, one end of which is connected to the main spindle assembly of the machine tool, and the other end of which is used to extend into the target part. The gun drill is provided with a water outlet hole that communicates with the central water outlet channel.

2. The drilling equipment according to claim 1, characterized in that: The gun drill includes a drill shank and a drill bit. One end of the drill shank is connected to the machine spindle assembly, one end of the drill bit is connected to the end of the drill shank away from the machine spindle assembly, and the other end of the drill bit is used to extend into the target part. The water outlet holes are respectively connected to the drill shank and the drill bit.

3. The drilling equipment according to claim 2, characterized in that: The drill bit is provided with a V-groove; The V-groove extends along the extension direction of the gun drill and passes through the end of the drill bit away from the drill shank.

4. The drilling equipment according to claim 3, characterized in that: The cross-sectional shape of the water outlet is configured as an arc extending circumferentially along the drill bit.

5. The drilling equipment according to claim 1, characterized in that: The diameter of the water outlet hole is smaller than the radial dimension of the central water outlet channel.

6. The drilling equipment according to claim 1, characterized in that: The drilling equipment also includes a tool handle assembly; The tool handle assembly is connected between the machine spindle assembly and the gun drill. The tool handle assembly is provided with a flow channel, and the two ends of the flow channel are respectively connected to the central water outlet channel and the water outlet hole.

7. The drilling equipment according to claim 6, characterized in that: The diameter of the flow channel connected to one end of the central water outlet channel is larger than the diameter of the flow channel connected to the water outlet hole. And / or, The diameter of the flow channel is larger than the diameter of the outlet hole.

8. The drilling equipment according to claim 6, characterized in that: The end of the gun drill near the main spindle assembly of the machine tool is inserted into the tool handle assembly.

9. The drilling equipment according to claim 6, characterized in that: One end of the knife handle assembly passes through the central water outlet channel.

10. The drilling equipment according to claim 1, characterized in that: The clamping assembly includes a base and a clamping member connected to the base, wherein an installation channel is defined between the clamping member and the base for the target part to pass through, and the clamping member is used to clamp the target part against the base.

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