CN210755382U - Hard alloy bar for processing cutting tool - Google Patents
Hard alloy bar for processing cutting tool Download PDFInfo
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- CN210755382U CN210755382U CN201921882441.3U CN201921882441U CN210755382U CN 210755382 U CN210755382 U CN 210755382U CN 201921882441 U CN201921882441 U CN 201921882441U CN 210755382 U CN210755382 U CN 210755382U
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- spiral
- cooling hole
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- auxiliary cooling
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Abstract
The utility model discloses a processing carbide rod for cutting tool, including the barred body, the spiral cooling hole that link up about barred body inside is equipped with the spiral auxiliary cooling hole that link up about barred body inside still is equipped with, and the diameter of this spiral auxiliary cooling hole is less than the spiral cooling hole, and the spiral face of cylinder at spiral cooling hole place is personally submitted inside and outside parallel arrangement with the spiral cylinder of spiral auxiliary cooling hole, and the spiral angle of spiral cooling hole is not equal with the spiral angle of spiral auxiliary cooling hole. The utility model arranges the spiral auxiliary cooling holes with the spiral angle different from that of the spiral cooling holes in the bar material, so that the cooling liquid can be sprayed out from different directions when the cooling liquid is introduced to process the workpiece, thereby achieving better cooling effect and prolonging the service life of the cutter; the crossing phenomenon of the cooling holes with different spiral angles can be avoided, and the ejection effect of each spiral angle is ensured. The utility model discloses the cooling effect is good, and the wearability is strong, is suitable for the fluted to process the fluted twist drill of taking the cooling hole.
Description
Technical Field
The utility model relates to a processing cutting tool art field especially relates to a processing carbide rod for cutting tool.
Background
Machining cutting tools are widely used in machining lathes as workpieces that are commonly used in industrial machining processes. Because lathe processing is generally to process metal workpiece, metal workpiece easily causes the overheat phenomenon in the course of working, not only can cause the damage to processing the work piece, and the product of processing also has certain flaw. The cooling mode that commonly uses in the existing market is that the surface of processing barred body leads to the coolant liquid, cools off it, but because the middle heat is higher in the work, coolant liquid temperature risees easily, and the cooling effect is not obvious, easily causes the loss of manpower and materials.
In order to solve the problems, a cemented carbide bar with an internal spiral cooling hole is produced at the same time and gradually becomes a representative product of a high and new technology of ultrafine cemented carbide, such as a chinese patent with publication number CN 103252679 a and a chinese patent with publication number CN 205745999U.
However, with the increasing market demand of the cemented carbide rod with the internal spiral cooling hole, how to make the cemented carbide rod have better cooling effect, longer service life and more popular with customers is a further problem that needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide a better, the longer processing carbide rod for cutting tool of life-span of cooling effect.
The utility model provides a this kind of processing carbide rod for cutting tool, including the barred body, the spiral cooling hole that link up about this barred body is inside to be equipped with the spiral auxiliary cooling hole that link up about the barred body is inside still to be equipped with, and the diameter of this spiral auxiliary cooling hole is less than the spiral cooling hole, and the spiral face of cylinder at spiral cooling hole place is interior outer parallel arrangement with the spiral cylinder face of spiral auxiliary cooling hole, and the spiral angle of spiral cooling hole is unequal with the spiral angle of spiral auxiliary cooling hole.
To facilitate proof measurement of the pitch, the helix angle of the helical cooling hole is greater than the helix angle of the helical auxiliary cooling hole, and the pitch of the helical cooling hole is the same as the pitch of the helical auxiliary cooling hole.
The outer surface of the rod body is fully distributed with closely arranged external threads, and the spiral cylindrical surface of the external threads is parallel to the spiral track surface of the spiral cooling hole.
In order to facilitate verification and measurement of the screw pitch, the screw line of the external screw thread is not parallel to the screw line of the spiral cooling hole, and the screw pitch of the external screw thread is the same as that of the spiral cooling hole.
The helix angle of the external thread is 15-70 degrees.
The external thread comprises a coarse thread and a plurality of fine threads, and the tooth thickness of the coarse thread is larger than that of the fine threads.
The two spiral cooling holes are symmetrically arranged along the axis of the rod body.
The two spiral auxiliary cooling holes are symmetrically arranged along the axis of the rod body.
The utility model arranges the spiral auxiliary cooling holes with the spiral angle different from that of the spiral cooling holes in the bar material, so that the cooling liquid can be sprayed out from different directions when the cooling liquid is introduced to process the workpiece, thereby achieving better cooling effect and prolonging the service life of the cutter; the spiral cooling holes and the spiral auxiliary cooling holes are arranged in a structure with parallel inner and outer spaces, so that the crossing phenomenon of the cooling holes with different spiral angles is avoided, and the spraying effect of each spiral angle is ensured; the spiral auxiliary cooling holes are designed to be smaller than the diameter of the spiral cooling holes, so that the influence on the strength of the bar body caused by too many spiral cooling holes is avoided, and the service life of the bar is ensured. The utility model discloses the cooling effect is better, and the wearability is stronger, and is longe-lived, is suitable for the fluted to process the fluted twist drill of banding cooling hole.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of a portion of the structure in fig. 1.
Fig. 3 is a partial structural view of a cross-sectional view taken at B-B in fig. 1.
The labels shown in the figures and the corresponding component names are:
1. a rod body; 2. a helical cooling hole; 3. a helical auxiliary cooling hole; 4. an external thread; 41. coarse threads; 42. fine threads.
Detailed Description
As can be seen from fig. 1 to 3, the hard alloy rod for machining a cutting tool of the present invention includes a rod 1, two spiral cooling holes 2 and two spiral auxiliary cooling holes 3 which are vertically communicated are disposed inside the rod 1, the two spiral cooling holes 2 are symmetrically disposed around the axis of the rod 1, the two spiral auxiliary cooling holes 3 are symmetrically disposed around the axis of the rod 1, and the diameter of the spiral auxiliary cooling holes 3 is smaller than the diameter of the spiral cooling holes 2; on the rod body 1, a spiral cylindrical surface where the spiral cooling hole 2 is positioned is sleeved outside a spiral cylindrical surface where the spiral auxiliary cooling hole 3 is positioned in parallel, and the spiral angle theta of the spiral cooling hole 22The helix angle theta with the spiral auxiliary cooling hole 33Not equal.
As can also be seen from fig. 1 to 3, in the present invention, the pitch of the spiral cooling hole 2 is the same as the pitch of the spiral auxiliary cooling hole 3, and according to the calculation relationship between the pitch and the diameter:
P·tanθ＝πD,
wherein P is the thread pitch, theta is the helical angle, and D is the thread rotation diameter;
it can be concluded that, according to the design and formula, the hole pitch of the two large-diameter spiral cooling holes 2 is different from that of the two small-diameter spiral auxiliary cooling holes 3, the hole pitch is taken as the diameter and is parallel along the track cylindrical surfaces rotating in the bar body 1, and the spiral angles theta of the two spiral cooling holes 2 are the same under the condition that the thread pitches are the same2Is larger than the helix angle theta 3 of the two spiral auxiliary cooling holes 3.
From fig. 1 to 3 can see, be equipped with external screw thread 4 on the 1 external surface of barred body the utility model discloses a 4 external screw threads closely arrange and make 1 transversal personally submit of barred body take the tooth decorative pattern form, and the helix angle of external screw thread 4 is 15 ~ 70, and the helical cylindrical surface at external screw thread 4 place is on a parallel with the spiral orbit face at spiral cooling hole 2 place, and the helix of external screw thread 4 is not parallel with the helix of spiral cooling hole 2, and the pitch of external screw thread 4 is the same with the pitch of spiral cooling hole 2.
As can be seen from fig. 1 to 3, the external thread 4 of the present invention includes a coarse thread 41 and a plurality of fine threads 42, and the tooth thickness of the coarse thread 41 is twice the tooth thickness of the fine threads 42, so that a wide thread mark line is formed on the surface of the rod 1.
Taking a hard alloy bar with the diameter of phi 8.3 as an example, the central connecting line of the two spiral cooling holes 2 in the bar body 1 is intersected with the central connecting line of the two spiral auxiliary cooling holes 3 to form an included angle of 30 degrees, the thread pitches of the spiral cooling holes 2, the spiral auxiliary cooling holes 3 and the external thread 4 are 44mm, the hole pitch of the two spiral cooling holes 2, namely the thread rotation diameter, is 3.8mm, the hole pitch of the two spiral auxiliary cooling holes 3, namely the thread rotation diameter, is 3.0mm, and the specific design size is as follows:
| pitch of thread | Diameter of thread rotation | Helix angle | |
| |
44mm | 3.8mm | 15.173° |
| Spiral |
44mm | 3.0mm | 12.088° |
| |
44mm | 8.3mm | 30.639° |
Claims (8)
1. The utility model provides a processing carbide rod for cutting tool, includes barred body (1), is equipped with spiral cooling hole (2) that link up from top to bottom in this barred body inside, its characterized in that: and a spiral auxiliary cooling hole (3) which is communicated up and down is also arranged in the rod body, the diameter of the spiral auxiliary cooling hole is smaller than that of the spiral cooling hole, the spiral cylindrical surface where the spiral cooling hole is positioned and the spiral cylindrical surface of the spiral auxiliary cooling hole are arranged in parallel inside and outside, and the spiral angle of the spiral cooling hole is not equal to that of the spiral auxiliary cooling hole.
2. The cemented carbide bar for machining cutting tools of claim 1, wherein: the helical angle of the helical cooling hole is larger than that of the helical auxiliary cooling hole, and the pitch of the helical cooling hole is the same as that of the helical auxiliary cooling hole.
3. The cemented carbide bar for machining cutting tools of claim 1, wherein: the outer surface of the rod body is fully distributed with closely arranged external threads (4), and the spiral cylindrical surface of the external threads is parallel to the spiral track surface of the spiral cooling hole.
4. The cemented carbide bar for machining cutting tools of claim 3, wherein: the spiral line of the external thread is not parallel to the spiral line of the spiral cooling hole, and the thread pitch of the external thread is the same as that of the spiral cooling hole.
5. The cemented carbide bar for machining cutting tools of claim 3, wherein: the helix angle of the external thread is 15-70 degrees.
6. The cemented carbide bar for machining cutting tools of claim 3, wherein: the external thread comprises a coarse thread (41) and a plurality of fine threads (42), and the tooth thickness of the coarse thread is larger than that of the fine thread.
7. The cemented carbide bar for machining cutting tools of claim 1, wherein: the two spiral cooling holes are symmetrically arranged along the axis of the rod body.
8. The cemented carbide bar for machining cutting tools of claim 1, wherein: the two spiral auxiliary cooling holes are symmetrically arranged along the axis of the rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921882441.3U CN210755382U (en) | 2019-11-04 | 2019-11-04 | Hard alloy bar for processing cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921882441.3U CN210755382U (en) | 2019-11-04 | 2019-11-04 | Hard alloy bar for processing cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210755382U true CN210755382U (en) | 2020-06-16 |
Family
ID=71048606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921882441.3U Active CN210755382U (en) | 2019-11-04 | 2019-11-04 | Hard alloy bar for processing cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210755382U (en) |
-
2019
- 2019-11-04 CN CN201921882441.3U patent/CN210755382U/en active Active
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