CN104227091A - Step cutter with replaceable cutter bit - Google Patents
Step cutter with replaceable cutter bit Download PDFInfo
- Publication number
- CN104227091A CN104227091A CN201410441824.2A CN201410441824A CN104227091A CN 104227091 A CN104227091 A CN 104227091A CN 201410441824 A CN201410441824 A CN 201410441824A CN 104227091 A CN104227091 A CN 104227091A
- Authority
- CN
- China
- Prior art keywords
- cutter
- knife
- cutter hub
- handle
- bit
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/009—Stepped drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/02—Connections between shanks and removable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/20—Number of cutting edges
- B23B2251/204—Four cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention relates to a step cutter with a replaceable cutter bit. The step cutter comprises a cutter handle and a cutter body, wherein the cutter body is in threaded connection with the cutter handle; a step reamer is arranged on the cutter body; a chip removal groove is formed between two adjacent blades of the step reamer; a cutter point is arranged at the tail end of the cutter body and is in arc transition fit with the tail ends of the two opposite blades. According to the scheme, the cutter point is arranged at the tail end of the cutter body, so that the cutter and a to-be-machined hole can be conveniently positioned, and the machining accuracy of the hole is improved; by virtue of the step reamer, different cutters are not needed to be replaced in the machining process of the hole, and the machining process is simplified; the cutter body is in threaded connection with the cutter handle, so that different cutter bodies can be replaced for machining holes with different apertures, and the work efficiency is greatly improved.
Description
Technical field
The present invention relates to machining tool field, be specifically related to a kind of step cutter of interchangeable bit.
Background technology
Can relate to the processing in many holes in the manufacture process of current automobile engine, hole inner structure is mostly comparatively complicated, establishes multiple stair-stepping annular round platform in such as hole, and the processing method in such hole needs the cooperation of multiple cutter to realize.So just there are some problems: when the different cutter of use carries out adding man-hour, the replacing of cutter is loaded down with trivial details, also cannot according to the height of the degree of depth adjustment cutter in hole, use different tool sharpenings concentric but waney hole time, the blade of cutter can not reach the station of specifying simultaneously, hole machined precision is low, and the efficiency of hole machined is low.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of step cutter processing the interchangeable bit simple, operating efficiency is high.
Realize technical scheme of the present invention as follows:
A kind of step cutter of interchangeable bit, comprise handle of a knife and cutter hub, be threaded between described cutter hub with described handle of a knife, described cutter hub is provided with step cornish bit, chip area is provided with between the adjacent edge of step cornish bit, the end of cutter hub is provided with point of a knife, the end arc-shaped transition of point of a knife and two blades be oppositely arranged.
Further, described step cornish bit has 4 blades, and each blade is uniformly distributed around cutter hub circumference.
Further, the blade of described step cornish bit has 3 steps.
Further, the step surface of described step and cutter hub axis angle 45 °.
Further, the afterbody arc surface transition of described chip area, and crossing with the outer circumference surface of cutter hub.
Further, the nose angle of described point of a knife is 120 °.
Have employed above-mentioned scheme, point of a knife is set at the end of cutter hub, be convenient to the location between cutter and hole to be processed, improve hole machined precision; The setting of step cornish bit, makes, in the process in hole, without the need to changing different cutters, to simplify manufacturing procedure; Be threaded between cutter hub with handle of a knife, the replaceable different cutter hub of processing different pore size can be realized, substantially increase operating efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure, 1 is handle of a knife, and 2 is cutter hub, and 3 is screwed hole, and 4 is thread segment, and 5 is blade, and 6 is chip area, and 7 is point of a knife.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
See Fig. 1, a kind of step cutter of interchangeable bit, comprise handle of a knife 1 and cutter 2 body, handle of a knife is established screwed hole 3, cutter hub is provided with the thread segment 4 closed with corresponding threaded holes, and cutter hub is threaded with handle of a knife, the diameter d of handle of a knife is (20-0.015) ~ (20-0.005) mm, the long L of handle of a knife is 85mm, and the aperture φ size of screwed hole is 12mm, and the hole depth h of screwed hole is 15mm.Described cutter hub is provided with step cornish bit, and step cornish bit has 4 blades 5, and each blade is uniformly distributed around cutter hub circumference, is provided with chip area 6 between adjacent edge, the afterbody arc surface transition of chip area, and crossing with the outer circumference surface of cutter hub.The blade of described step cornish bit has 3 steps, step surface and the cutter hub axis angle α of each step are 45 °, cutter hub is divided into three sections by arranging of step, be respectively large section, stage casing, segment, the diameter d 1 of large section is (20+0.012) ~ (20+0.015) mm, long L1 is 25mm, the diameter d 2 in stage casing is 18.5mm, long L2 is 10mm, the diameter of segment is d3 be (17+0.01) ~ (17+0.014) mm, long L3 is (9.5-0.1) ~ (9.5+0.1) mm.The end of described cutter hub is provided with point of a knife 7, the nose angle β of point of a knife is 120 °, the width w of point of a knife is (16+0.05) ~ (16-0.05) mm, and the end arc-shaped transition of described point of a knife and two blades be oppositely arranged, the radius r of arc-shaped transition is 1mm.
Structure of the present invention is simple, easy to use.During use, cutter hub is threaded with handle of a knife, for improving the bonding strength between cutter hub and handle of a knife, also can offers the screwed hole B that communicate vertical with screwed hole on the sidewall of handle of a knife, in screwed hole B, establishing caging bolt, realize the axial limiting to cutter hub and handle of a knife; Be threaded between cutter hub with handle of a knife, make can change different cutter hubs during processing different pore size, simplify cutter changing process, improve cutter changing efficiency.Herein cutter hub and handle of a knife connected mode and cutter hub and handle of a knife axial limiting mode are not limited in this.By being arranged on the point of a knife of cutter hub end, realizing the accurate location in cutter and hole to be processed, improving hole machined precision; Behind location, realize cutting the primary drilling in hole by point of a knife, the ream operation after making it is more smooth.The setting of step cornish bit, make to have in hole multiple stage rank hole add man-hour, without the need to changing different cutters, disposable machine-shaping can be realized, simplify manufacturing procedure, also ensure that the concentricity of hole machined simultaneously, substantially increase working (machining) efficiency, hole machined precision.The afterbody arc surface transition of chip area, and crossing with the outer circumference surface of cutter hub, and the chip removal avoided in hole machined process falls into cutter hub and handle of a knife junction, improves the service life of cutter hub and handle of a knife.
The present invention is not limited to described embodiment, and those skilled in the art, not departing from spirit of the present invention namely openly in scope, still can do some and revise or change, therefore the scope that the scope of the present invention limits with claims is as the criterion.
Claims (6)
1. the step cutter of an interchangeable bit, comprise handle of a knife and cutter hub, it is characterized in that: be threaded between described cutter hub with described handle of a knife, described cutter hub is provided with step cornish bit, chip area is provided with between the adjacent edge of step cornish bit, the end of cutter hub is provided with point of a knife, the end arc-shaped transition of point of a knife and two blades be oppositely arranged.
2. the step cutter of a kind of interchangeable bit according to claim 1, is characterized in that: described step cornish bit has 4 blades, and each blade is uniformly distributed around cutter hub circumference.
3. the step cutter of a kind of interchangeable bit according to claim 1, is characterized in that: the blade of described step cornish bit has 3 steps.
4. the step cutter of a kind of interchangeable bit according to claim 3, is characterized in that: the step surface of described step and cutter hub axis angle 45 °.
5. the step cutter of a kind of interchangeable bit according to claim 1, is characterized in that: the afterbody arc surface transition of described chip area, and crossing with the outer circumference surface of cutter hub.
6. the step cutter of a kind of interchangeable bit according to claim 1, is characterized in that: the nose angle of described point of a knife is 120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441824.2A CN104227091A (en) | 2014-09-01 | 2014-09-01 | Step cutter with replaceable cutter bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441824.2A CN104227091A (en) | 2014-09-01 | 2014-09-01 | Step cutter with replaceable cutter bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104227091A true CN104227091A (en) | 2014-12-24 |
Family
ID=52216486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410441824.2A Pending CN104227091A (en) | 2014-09-01 | 2014-09-01 | Step cutter with replaceable cutter bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104227091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999114A (en) * | 2015-07-31 | 2015-10-28 | 株洲钻石切削刀具股份有限公司 | Hole machining straight fluted drill |
-
2014
- 2014-09-01 CN CN201410441824.2A patent/CN104227091A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999114A (en) * | 2015-07-31 | 2015-10-28 | 株洲钻石切削刀具股份有限公司 | Hole machining straight fluted drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |