CN201316832Y - Semi-precise milling cutter for concave groove - Google Patents
Semi-precise milling cutter for concave groove Download PDFInfo
- Publication number
- CN201316832Y CN201316832Y CNU2008202115758U CN200820211575U CN201316832Y CN 201316832 Y CN201316832 Y CN 201316832Y CN U2008202115758 U CNU2008202115758 U CN U2008202115758U CN 200820211575 U CN200820211575 U CN 200820211575U CN 201316832 Y CN201316832 Y CN 201316832Y
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- CN
- China
- Prior art keywords
- cutter
- cutter head
- tool bit
- concave groove
- semi
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000003801 milling Methods 0.000 title claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 abstract 2
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000002161 passivation Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000035929 gnawing Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Milling Processes (AREA)
Abstract
The utility model provides a milling cutter, in particular to a semi-precise milling cutter for a concave groove. The utility model is designed to solve the problem that the design precision requirement of the rotor concave groove can not be met during the use process of the cutter owning to unreasonable design of geometrical angle of the existing semi-precise milling cutter of the concave groove and unreasonable design of back off amount of the cutter. The external surface of the tool bit is a cone and the cross-section is gradually decreased from the tool bit transition section to the end of the tool bit; the external surface of the tool bit is provided with a helix edge; the tool bit is provided with at least three chip flutes from the tool bit transition section to the end surface of the tool bit; the cutting rake angle of the tool bit is ranging from 6 degrees to 8 degrees; the helix angle of the helix edge is ranging from 4.5 degrees to 5.5 degrees; the helix edge is provided with a waveform edge in the length direction; and the back off amount of the helix edge is ranging from 2mm to 3mm. Owning to the unique waveform edge, the utility model reduces the cutting resistance of the cutter, increases the wear resistance of the cutter, has smooth scrap drainage, is beneficial for the heat dissipation of the cutter during the cutting process, has small vibration, is not easy to break the cutter and prolongs the service life of the cutter; furthermore, the reasonable design of the back off amount increases the strength of the cutting edge, thus avoiding breaking the cutter.
Description
Technical field
The utility model relates to a kind of milling cutter.
Background technology
Semi-precise milling cutter for concave groove is used for processing the turbo rotor groove after rough milling, and existing semi-precise milling cutter for concave groove anterior angle is 0 °, and resistance to cutting is big, and similar during the cutter actual cut " gnawing firmly " increased the lathe live load on the one hand, is easy on the other hand forge a knife; The design of the geometric angle of semi-precise milling cutter for concave groove is unreasonable because cutter back-off amount (K value) size is all the same, the back-off amount is excessive to cause that the cutter chip pocket is less, during cutting the iron filings chip removal smooth, vibrate greatly, forge a knife easily; The back-off amount is too small, causes Tool in Cutting sword insufficient strength, also forges a knife easily.The semi-precise milling cutter for concave groove material generally adopts high speed steel W2Mo9Cr4Vco8 (M42), and M42 is without Passivation Treatment, and the zigzag burr (defective) that produces during tool grinding bursts apart when cutting easily, causes product quality to descend; Wheel slotting cutter finished product is not handled through magnetic fluorescent penetrating inspection, is difficult to guarantee the service property (quality) of cutter.
The utility model content
The purpose of this utility model is unreasonable for solving existing semi-precise milling cutter for concave groove geometric angle design, and the design of cutter back-off amount is unreasonable can't satisfy the problem that the rotor groove design accuracy requires when causing cutter to use, and a kind of semi-precise milling cutter for concave groove is provided.
The utility model comprises handle of a knife, shoulder, cutter head changeover portion and cutter head, handle of a knife, shoulder, cutter head changeover portion and cutter head are made one successively, the end face of the outer surface of handle of a knife from the handle of a knife afterbody to shoulder has 4: 100 tapering, the appearance of cutter head is a bullet, cutter head changeover portion to the end cross-sectional of cutter head reduces gradually, the outer surface of cutter head is provided with the spiral shell land, the end of cutter head from the cutter head changeover portion to cutter head is provided with at least three chip pockets, the cutting anterior angle of cutter head is 6 °～8 °, helical angle on the spiral shell land for be 4 ° 30 '～5 ° 30 ', the spiral shell land is provided with the waveform sword along its length, and the back-off amount K on the spiral shell land is 2～3mm.
The utility model has the advantages that: the utility model has designed unique waveform sword, has reduced the Tool in Cutting resistance on the one hand, increases the cutter wearability; Chip removal is smooth and easy on the other hand, the service life that dispel the heat when helping Tool in Cutting, vibration is little, is difficult for having forged a knife, having improved cutter; The appropriate design of back-off amount has increased the intensity of cutting edge, has avoided forging a knife.
Description of drawings
Fig. 1 is the overall structure cutaway view of the utility model race roughing milling cutter, and Fig. 2 is the external structure schematic diagram of cutter head changeover portion 3 and cutter head 4, Fig. 3 be the C of Fig. 1 to view, Fig. 4 is the I partial enlarged drawing of Fig. 1.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1～Fig. 3, present embodiment comprises handle of a knife 1, shoulder 2, cutter head changeover portion 3 and cutter head 4, handle of a knife 1, shoulder 2, cutter head changeover portion 3 and cutter head 4 are made one successively, the outer surface of handle of a knife 1 has 4: 100 tapering to the end face of shoulder 2 from handle of a knife 1 afterbody, the appearance of cutter head 4 is a bullet, cutter head changeover portion 3 to the end cross-sectional of cutter head 4 reduces gradually, the outer surface of cutter head 4 is provided with spiral shell land 4-1,4 end is provided with at least three chip pocket 4-2 to cutter head 4 from cutter head changeover portion 3 to cutter head, the cutting anterior angle α of cutter head 4 is 6 °～8 °, helical angle on the spiral shell land 4-1 be β be 4 ° 30 '～5 ° 30 ', spiral shell land 4-1 is provided with waveform sword 4-1-1 along its length, back-off amount K on the spiral shell land 4-1 is 2～3mm, and back-off amount K value is the difference (in the teeth of China Machine Press's " cutter manufacturing process " chapter 7 cutter clear and definite definition being arranged) of radius between the cutter adjacent teeth.Helixangle makes that cutting is very brisk in above-mentioned scope, reduced the cutting resistance of cutter, has reduced the roughness of rotor groove, has improved the rotor groove crudy, has satisfied the requirement of rotor groove design accuracy.Chip pocket 4-2 makes chip removal more smooth and easy.Design can guarantee that half finish-milling cutter reserves more reasonably chipping allowance for the finish-milling operation in processing during race like this.The semi-precise milling cutter for concave groove finished product is through the Passivation Treatment before and after the coating, removed the droplet that produces after the projection of point of a knife part and the coating, and the race fineness of processing reaches 0.8.
The specific embodiment two: in conjunction with Fig. 4 present embodiment is described, the helical angle on the spiral shell land 4-1 of present embodiment is that β is 5 °.Helixangle is designed to 5 °, makes that cutting is very brisk, has reduced the resistance to cutting of cutter, has reduced the roughness of rotor groove, has improved the rotor groove crudy, has satisfied the requirement of rotor groove design accuracy.
The specific embodiment three: in conjunction with Fig. 4 present embodiment is described, the pitch t of the waveform sword 4-1-1 of present embodiment is 0.8～1.5mm, and the crest on the waveform sword 4-1-1 to the distance h between the trough is 0.15～0.25mm.Pitch t, crest to the numerical value of trough just can reduce cutting resistance, make chip removal smooth and easy in above-mentioned scope.
The specific embodiment four: in conjunction with Fig. 4 present embodiment is described, the pitch t of the waveform sword 4-1-1 of present embodiment is 1mm, and the crest on the waveform sword 4-1-1 to the distance h between the trough is 0.2mm.Pitch t, crest make cutting resistance minimum, chip removal more smooth and easy when trough is above-mentioned numerical value.
The specific embodiment five: in conjunction with Fig. 1 present embodiment is described, the length L of the chip pocket 4-2 of present embodiment must not be less than 31mm, and the length L maximum of chip pocket 4-2 is no more than the length of cutter head 4.Chip pocket 4-2 makes chip removal smooth and easy in above-mentioned scope.
The specific embodiment six: in conjunction with Fig. 1 present embodiment is described, the material of the handle of a knife 1 of present embodiment, shoulder 2, cutter head changeover portion 3 and cutter head 4 is PM HSS (ASP2030).There is not carbide segregation in this material, and the material combination property is fine, has improved the cutter serviceability greatly.
The above-mentioned wheel slotting cutter of finishing is carried out Passivation Treatment, trickle circular cutting edge will occur through the spiral shell land 4-1 and the point of a knife of Passivation Treatment, it is smooth that land also will become, and eliminated defectives such as open-minded tooth, sawtooth and crackle.The wheel slotting cutter of finishing Passivation Treatment is carried out fluorescent magnetic particle flaw detection to be handled, can be by fluorescent magnetic particle flaw detection with the defective of tool surface existence, detect as crackle, slag inclusion, carbide segregation, bubble etc., add at race and cause tipping man-hour in order to avoid will have the cutter of above-mentioned defective, guaranteed the quality of wheel slotting cutter.
Claims (5)
1, a kind of semi-precise milling cutter for concave groove, it is characterized in that: it comprises handle of a knife (1), shoulder (2), cutter head changeover portion (3) and cutter head (4), handle of a knife (1), shoulder (2), cutter head changeover portion (3) and cutter head (4) are made one successively, the outer surface of handle of a knife (1) has 4: 100 tapering to the end face of shoulder (2) from handle of a knife (1) afterbody, the appearance of cutter head (4) is a bullet, cutter head changeover portion (3) to the end cross-sectional of cutter head (4) reduces gradually, the outer surface of cutter head (4) is provided with spiral shell land (4-1), the end of cutter head (4) from cutter head changeover portion (3) to cutter head (4) is provided with at least three chip pockets (4-2), the cutting anterior angle (α) of cutter head (4) is 6 °～8 °, helical angle on the spiral shell land (4-1) for (β) be 4 ° 30 '～5 ° 30 ', spiral shell land (4-1) is provided with waveform sword (4-1-1) along its length, and the back-off amount (K) on the spiral shell land (4-1) is 2～3mm.
2, semi-precise milling cutter for concave groove according to claim 1 is characterized in that: the helical angle on the spiral shell land (4-1) is 5 ° for (β).
3, semi-precise milling cutter for concave groove according to claim 1 is characterized in that: the pitch (t) of waveform sword (4-1-1) is 0.8～1.5mm, and the crest on the waveform sword (4-1-1) to the distance between the trough (h) is 0.15～0.25mm.
4, semi-precise milling cutter for concave groove according to claim 3 is characterized in that: the pitch (t) of waveform sword (4-1-1) is 1mm, and the crest on the waveform sword (4-1-1) to the distance between the trough (h) is 0.2mm.
5, semi-precise milling cutter for concave groove according to claim 4 is characterized in that: the length (L) of chip pocket (4-2) must not be less than 31mm, and length (L) maximum of chip pocket (4-2) is no more than the length of cutter head (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202115758U CN201316832Y (en) | 2008-12-01 | 2008-12-01 | Semi-precise milling cutter for concave groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202115758U CN201316832Y (en) | 2008-12-01 | 2008-12-01 | Semi-precise milling cutter for concave groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201316832Y true CN201316832Y (en) | 2009-09-30 |
Family
ID=41195604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202115758U Expired - Lifetime CN201316832Y (en) | 2008-12-01 | 2008-12-01 | Semi-precise milling cutter for concave groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201316832Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921090A (en) * | 2014-04-28 | 2014-07-16 | 哈尔滨汽轮机厂有限责任公司 | Machining method of wheel groove semi-finish milling cutter |
-
2008
- 2008-12-01 CN CNU2008202115758U patent/CN201316832Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921090A (en) * | 2014-04-28 | 2014-07-16 | 哈尔滨汽轮机厂有限责任公司 | Machining method of wheel groove semi-finish milling cutter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090930 |