Special knife with double knife tips
By designing a special double-tip tool, the problem of low efficiency and poor quality caused by interference in the finishing of the inner end face of deep holes in metal workpieces was solved, achieving efficient and stable machining results for the inner end face of deep holes.
Patent Information
- Application Number
- CN202520602496.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-01
AI Technical Summary
In existing technologies, when finishing the inner end face of deep holes in metal workpieces, the interference between the movement of the tool holder and the inner wall of the workpiece prevents machining near the center, resulting in low production efficiency and poor quality.
Design a special double-tip tool with the cutting edges of the two inserts located in the same plane. They are connected to the tool holder by a spiral or trapezoidal meshing thread and equipped with a drain hole for cooling and lubrication, adapting to the machining requirements of the inner end face of different deep holes.
It enables efficient finishing of the inner end face of deep holes in metal workpieces, improves processing efficiency and quality, reduces processing dead angles caused by interference, has strong applicability, and is easy to operate.
Smart Images
Figure CN223946825U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of machining, and particularly relates to a double-point special tool, which can simultaneously install two fine turning end face blades and is used for fine machining of an inner end face of a metal workpiece. BACKGROUND
[0002] At present, for the machining method of fine machining of an inner end face of a deep hole of a metal workpiece, the inner end face close to a center position cannot be machined due to interference between a tool bar and a tool and a workpiece inner wall during movement, so a step-by-step parking rotary tool mode is usually used to complete machining of two processes, but under the condition of mass production, frequent parking of the rotary tool greatly influences machining efficiency and machining quality, and further leads to capacity reduction and benefit reduction. SUMMARY
[0003] The utility model provides a double-point special tool, and the technical problem to be solved is that the problem of low production efficiency and unguaranteed quality caused by failure of one tool to complete fine machining of an inner end face of a deep hole of a metal workpiece is solved.
[0004] In order to solve the above technical problems, the utility model provides a double-point special tool, characterized by comprising a tool body (64) and two blades (62) fixed to one side of the tool body (64), and cutting edges of the two blades (62) are located in the same plane.
[0005] Further, the tool body (64) is provided with meshing teeth (67) at the bottom, which are used for matched connection with teeth at the end of a tool bar.
[0006] Further, the meshing teeth (67) are in spiral or trapezoidal structures.
[0007] Further, the two blades (62) are fixed on the tool body (64) through blade locking bolts (63).
[0008] Further, the blade (62) is provided with drainage holes (66) at the bottom.
[0009] Further, the number of the drainage holes (66) is two, and the drainage holes (66) are symmetrically distributed on both sides of a center line at the bottom of the blade (62).
[0010] Further, the blade (62) is a fine turning end face blade, and the material is hard alloy or ceramic.
[0011] Further, the tool tip of the blade on the outside is used for turning an inner hole and an inner end face at a distance of 1 / 2 of an inner end face center distance of a deep hole diameter, and the tool tip of the blade on the inside is used for turning the inner end face center distance of the deep hole to a workpiece center.
[0012] Further, the installation angle of the two blades (62) is adjustable to adapt to the machining requirements of different deep hole inner end faces.
[0013] Further, the material of the cutter body (64) is high-strength alloy steel.
[0014] Beneficial effects: the double-point special tool of the utility model adopts double-point tool bit design to carry out workpiece deep hole inner end face finishing, and the two points of the double-point special tool for machining simultaneously contact the workpiece end face during machining, and the point close to the cutter center can simultaneously machine the position which cannot be machined by the inner end face close to the center position due to the interference between the cutter bar and the cutter and the workpiece inner wall during movement. The double-point special tool has the advantages of high stability, simple operation and high efficiency. The machining range is wide, and the applicability is strong. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 Double-point special tool schematic view
[0016] Figure 2 Machining schematic view
[0017] Figure 3 Double-point special tool perspective view DETAILED DESCRIPTION
[0018] In order to make the purpose, content and advantages of the utility model more clear, the specific implementation mode of the utility model is described in further detail below.
[0019] The double-point special tool of the utility model comprises a blade (62), a blade locking bolt (63), a cutter body (64), a locking bolt (65), a liquid discharge hole (66) and a meshing tooth (67).
[0020] The two blades (62) are locked and fixed on one side of the cutter body (64) by the blade locking bolt (63), two liquid discharge holes (66) are arranged at the bottom of the blade, and the liquid discharge holes (66) are used to accelerate cooling, lubrication and flushing of the machining position and the cutter; the bottom of the cutter body (64) is provided with the meshing tooth (67) matched with the end part of the cutter bar.
[0021] The blade 62 adopts a VBMT 160408-PM 4415 blade.
[0022] The cutting edges of the two blades 62 are in the same plane, and the double-point design can avoid the situation that part of the inner end face cannot be machined by the cutter due to the interference between the cutter bar and the cutter and the workpiece inner wall during movement, and increase the machining efficiency.
[0023] In use, the two inserts (62) with the cutting edges in the same plane are locked and fixed on one side of the blade body (64) by the insert locking bolt (63), the double-tool-bit design can avoid the situation that part of the inner end surface cutter cannot be machined due to the interference between the tool bar and the inner wall of the workpiece during the movement of the tool bar and the cutter, and the machining efficiency is increased; two liquid discharge holes (66) are arranged at the bottom of the insert to accelerate the cooling, lubrication and flushing of the machining position and the cutter; the meshing teeth (67) at the bottom of the blade body (64) are pressed into the meshing teeth at the front end of the tool bar, and are fixed by locking bolts, so that the axial and radial stable high-strength connection with the tool bar is realized.
[0024] After the double-tool-bit special cutter is installed, the tool setting is started and the machining of the workpiece is started.
[0025] The double-tool-bit special cutter is used to turn the deep hole inner end surface to ensure the flatness.
[0026] The first tool bit of the double-tool-bit special cutter is used to turn the inner hole and the inner end surface at the diameter of the deep hole to the distance of 1 / 2 of the center of the inner end surface, and the second tool bit is used to turn the inner end surface at 1 / 2 of the deep hole to the center of the workpiece and ensure the flatness of the turned deep hole inner end surface.
[0027] Since the deep blind hole has a deep diameter and a tolerance requirement, the inner bottom surface 61 needs to be turned when turning the deep blind hole, and the length-diameter ratio of the workpiece hole reaches 10 times the diameter, so as to increase the cross-sectional area of the tool bar as much as possible to increase the rigidity of the tool bar. The distance between the outer diameter of the tool bar and the inner wall of the deep hole is smaller than the distance between the tool tip of the standard cutter and the center of the inner end surface of the deep hole. The double-tool-bit special cutter for turning the deep hole and the inner end surface of the deep hole is clamped on the tool bar, the workpiece end surface is tool set, the tool holder position is slightly adjusted, the two tool tips of the double-tool-bit special cutter contact the workpiece end surface at the same time, the first tool tip of the double-tool-bit special cutter is used to turn the inner hole and the inner end surface at the diameter of the deep hole to the distance of 1 / 2 of the center of the inner end surface, and the second tool tip is used to turn the inner end surface at 1 / 2 of the deep hole to the center of the workpiece and ensure the flatness of the turned deep hole inner end surface.
[0028] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and deformations can be made without departing from the technical principles of the present application, and these improvements and deformations should also be regarded as the protection range of the present application.
Claims
1. A double tip dedicated knife characterized in that, The application relates to a double-blade tool body. The tool body (64) is provided with engaging teeth (67) at the bottom for matching connection with the teeth of the end of a tool bar.
2. The dual point dedicated knife of claim 1, wherein, The engaging teeth (67) are in spiral or trapezoidal structures.
3. The dual point dedicated knife of claim 2, wherein, The two blades (62) are fixed on the tool body (64) through blade locking bolts (63).
4. The dual point dedicated knife of claim 1, wherein, The bottom of the blade (62) is provided with liquid discharge holes (66).
5. The dual point dedicated knife of claim 1, wherein, The number of the liquid discharge holes (66) is two, which are symmetrically distributed on both sides of the center line of the bottom of the blade (62).
6. The dual point dedicated knife of claim 5, wherein, The blade (62) is a finish turning end face blade, and the material is hard alloy or ceramic.
7. The dual point dedicated knife of claim 1, wherein, The blade tip of the blade on the outer side is used for turning the inner end face of a deep hole and a distance of 1 / 2 of the inner end face center distance at the diameter of the deep hole, and the blade tip of the blade on the inner side is used for turning the distance of 1 / 2 of the inner end face center distance to the center of a workpiece.
8. The dual point dedicated knife of claim 1, wherein, The installation angle of the two blades (62) can be adjusted to adapt to the machining requirements of different deep hole inner end faces.
9. The double-pointed dedicated knife according to any one of claims 1-8, characterized in that, The material of the tool body (64) is high-strength alloy steel.
10. The double point dedicated knife according to any one of claims 1-8, wherein,