CN104353894A - Inner broaching tool for broaching and cutting - Google Patents
Inner broaching tool for broaching and cutting Download PDFInfo
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- CN104353894A CN104353894A CN201410645578.2A CN201410645578A CN104353894A CN 104353894 A CN104353894 A CN 104353894A CN 201410645578 A CN201410645578 A CN 201410645578A CN 104353894 A CN104353894 A CN 104353894A
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- cutter
- cutter tooth
- broaching
- groove
- broach
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- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention discloses an inner broaching tool for broaching and cutting. The inner broaching tool comprises a broaching tool body, wherein a through hole is formed in the axial direction of the center of the broaching tool body; a clamping groove is formed in the side wall of the through hole; a group of cutter teeth is arranged at the periphery of the broaching tool body; each cutter tooth comprises a cutter tip part, a cutting part, a blade edge part and a cutter root part; each blade edge part is positioned on the inner side of the cutter tooth; the outer edges of each blade edge part and each cutter root part are step-shaped; a retracting seam is formed in the radial direction of each cutter root part; each cutting part is positioned on the outer side of the cutter tooth; an included angle of 10 to 30 degrees is formed between the outer edge of each cutting part and the tangential line of the outer edge of the broaching tool body; a groove is formed between the cutter root part of one cutter tooth in the group of cutter teeth and the cutting part of the adjacent cutter tooth; a compressing block is detachably connected in each groove and is arranged on the radial line, provided with the retracting seam, of the cutter root part. The defects of low cost and waste of the current broaching tool for broaching and cutting are overcome, the inner broaching tool provided by the invention can comprehensively use the cutter teeth with the same shape to process a plurality of models of workpieces, and the cost is reduced.
Description
Technical field
The invention belongs to broacher field, being specifically related to a kind of inside broach for broaching.
Background technology
Broaching is a type of Machining operations, is the Cutting Process using broaching machine (broaching tool) to process various inside and outside profiled surface.Broaching tool is the forming tool for broaching, tool surface arranges cutter tooth more, the size and dimension of each row's cutter tooth increases from incision end successively to cutting out end and changes, when broaching motion done by broaching tool, each cutter tooth just cuts the metal of necessarily thick ° from workpiece, finally obtain required size and dimension.Broaching tool is usually used in batch and processes circular hole, splined hole, keyway, plane and profiled surface etc. in a large amount of production, and productivity ratio is very high.The difference at finished surface position pressed by broaching tool, is divided into inside broach and broach for external bracing; By the difference of force way during work, be divided into broaching tool and push broach.By the machining of broaching tool as cutter, its operation principle is: when broaching tool opposite piece moves linearly, and the allowance of workpiece excises by the cutter tooth of tooth growing dimensions successively by broaching tool, usually, one action stroke can shape, and is a kind of high efficiency method for fine finishing.But because of broaching tool complex structure, manufacturing cost is high, and have certain specificity, therefore broaching is mainly used in producing in a large number in batch.
Existing broaching tool is generally one-time formed cutter, different shapes applies different cutters, in cutter, the shape of cutter tooth is also had nothing in common with each other, and in a kind of broaching tool of cutter tooth of shape, the length of cutter tooth ° for the precision of processing and size most important, therefore, the corresponding a kind of broaching tool of each model, therefore, the waste of cost is so just caused.
Summary of the invention
The technical problem to be solved in the present invention often plants the corresponding a kind of broaching tool of model for existing broaching broaching tool, the shortcoming of its cost waste, provide a kind of can by the cutter tooth integrated application of same shape, processing multiple types workpiece, the broaching broaching tool that cost reduces.
In order to solve the problems of the technologies described above, the invention provides following technical scheme: for the inside broach of broaching, comprise broach body, the center of broach body is axially arranged with through hole, and the sidewall of through hole is provided with draw-in groove, the outer of broach body is arranged with one group of cutter tooth, cutter tooth comprises nose part, cutting portion, blade part and cutter root, blade part is positioned at inside cutter tooth, the outward flange of blade part and cutter root is stepped, cutter root radial direction is provided with shrinkage joint, cutting portion is positioned at the outside of cutter tooth, being provided with angle between the outward flange of cutting portion and broach body outer rim tangent line is angle between 10-30 °, groove is provided with between the cutter root of one of them cutter tooth and the cutting portion of adjacent cutter tooth in one group of cutter tooth, compact heap is removably connected with in groove, compact heap is installed with on the RADIAL that cutter root is provided with shrinkage joint place.
What adopt technical solution of the present invention comprises broach body, and the center of broach body is axially arranged with through hole, and the sidewall of through hole is provided with draw-in groove, and axially extending bore and draw-in groove are convenient to broaching tool to be arranged on connecting rod, and draw-in groove is then convenient to buckle, makes fixing more firm.The outer of broach body is arranged with one group of cutter tooth, and cutter tooth comprises nose part, cutting portion, blade part and cutter root, and blade part is positioned at inside cutter tooth, and the outward flange of blade part and cutter root is stepped, and cutter root radial direction is provided with shrinkage joint, and cutting portion is positioned at the outside of cutter tooth; Nose part gives workpiece initial shearing force, cutting portion is used for giving workpiece cutting force, its main broaching effect, blade part and cutter root are for supporting nose part and cutting portion, the shrinkage joint of cutter root can help the cutting portion of cutter tooth to rise along the RADIAL of broach body or decline, thus the length ° of cutter tooth can be changed, the cutter tooth for broaching tool is positioned at the length ° change of inside workpiece, thus changes the diameter of bore change of inside broach broaching.Being provided with angle between the outward flange of cutting portion and broach body outer rim tangent line is angle between 10-30 °; Make cutting portion give prominence to broach body, thus give workpiece shearing force.Be provided with groove between the cutter root of one of them cutter tooth and the cutting portion of adjacent cutter tooth in one group of cutter tooth, be removably connected with compact heap in groove, compact heap is installed with on the RADIAL that cutter root is provided with shrinkage joint place; Compact heap in groove can compress the shrinkage joint of cutter root, thus high ° of the radial direction changing the cutting portion of cutter tooth, realize the effect regulating cutter tooth.
Operation principle of the present invention and beneficial effect are: be arranged on connecting rod by broach body central shaft to the through hole arranged and draw-in groove, cutter root is compressed by the compact heap on the groove between cutting portion and cutter root, fix by bolt between compact heap and broach body, also fix by screw, thus wide ° of shrinkage joint is regulated by the thrust ° of compact heap, thus regulate the nose part of cutter tooth along high ° of the radial direction of broach body axial line, and then regulate cutting portion along high ° of the radial direction of broach body axial line; Thus make a kind of cutter tooth of shape can be applicable to the interior hole machined of different model, make the broaching tool of Multiple Type with the cutter tooth of a kind of shape of the prior art, cost reduces.
Further, being provided with angle between the outward flange of described cutting portion and broach body outer rim tangent line is 20 °.The cutting force of less than 20 ° cutting portions is weak, more than 20 ° then cutter tooth damage, 20 ° make the cutting force of cutter tooth ° large and strong ° strong.
Further, being provided with angle between the bottom of described groove and the outer peripheral tangent line of broach body is angle between 10-20 °.Strong ° of the cutter root of cutter tooth is strengthened on the inclined-plane of bottom portion of groove, avoid dark ° of groove excessively dark, and the connection of the cutter root of cutter tooth and broach body is less, weakens strong °.
Further, the sidewall of described groove near cutter tooth cutting portion side is inclined-plane, and the angle between inclined-plane and bottom portion of groove is between 120-130 °.The junction being the cutter root and broach body in order to ensure cutter tooth is equally enough large, strengthens strong ° of cutter tooth.
Further, be crisscross arranged between the cutter tooth that the axis of one group of cutter tooth on described broach body is adjacent.Make the contact surface of the cutting portion of cutter tooth large, the part that the cutting portion compensating a upper circle cutter tooth is not broached, the precision of broaching is increased.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, technical solution of the present invention is further illustrated:
Fig. 1 is the embodiment of the present invention for the schematic diagram of the inside broach of broaching;
Fig. 2 is the sectional schematic diagram of A-A in Fig. 1.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the inside broach of the present invention for broaching, comprises broach body 1, and the center of broach body 1 is axially arranged with through hole 2, and the sidewall of through hole 2 is provided with draw-in groove 3, the front end of broach body 1 is front pilot, the rear end of broach body 1 is rear pilot, the outer of broach body 1 between front pilot and rear pilot is arranged with one group of cutter tooth, be crisscross arranged between the cutter tooth that the axis of one group of cutter tooth is adjacent, cutter tooth comprises nose part 4, cutting portion 5, blade part 6 and cutter root 7, blade part 6 is positioned at inside cutter tooth, blade part 6 is stepped with the outward flange of cutter root 7, cutter root 7 radial direction is provided with shrinkage joint 8, cutting portion 5 is positioned at the outside of cutter tooth, being provided with angle between the outward flange of cutting portion 5 and broach body 1 outer rim tangent line is angle between 10 °, groove 9 is provided with between the cutter root 7 of one of them cutter tooth and the cutting portion 5 of adjacent cutter tooth in one group of cutter tooth, the angle that angle is 10 ° is provided with between the bottom of groove 9 and the outer peripheral tangent line of broach body 1, the sidewall of groove 9 near cutter tooth cutting portion 5 side is inclined-plane 11, and bottom inclined-plane 11 and groove 9 between angle be 120 °, compact heap 10 is removably connected with in groove 9, the top of compact heap 10 is provided with perforation, unified RADIAL when broach body 1 and compact heap 10 are positioned in groove 9 is provided with counterbore, compact heap 10 is connected with broach body 1 by bolt, and bolt is sunken to bottom, compact heap 10 top, compact heap 10 is installed with on the RADIAL that cutter root 7 is provided with shrinkage joint 8 place.
In specific implementation process, during use, by through hole 2 and draw-in groove 3, broach body 1 is axially fixed on connecting rod, compact heap 10 is positioned in groove 9, and make compact heap 10 be adjacent to the inclined-plane 11 with groove 9, and with bolt, itself and broach body 1 are fixed, according to the tightness of the height adjustment bolt of the nose part 4 of cutter tooth, thus regulate the width of cutter root 7 shrinkage joint 8, and then regulate nose part 4 apart from the height of the axial line of broach body 1, after adjustment completes, broaching tool front pilot is introduced workpiece; Front pilot, plays guiding function, prevents broaching tool crooked; First the nose part 4 of cutter tooth gives workpiece shearing force, and cutting portion 5 completes cutwork, and blade part 6 plays a supportive role; Rear pilot, for holding workpieces, damages finished surface and cutter tooth because workpiece is sagging before preventing cutter tooth from cutting off.
For a person skilled in the art, under the prerequisite not departing from structure of the present invention, can also make some distortion and improvement, these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.
Claims (5)
1. the inside broach for broaching, is characterized in that: comprise broach body, and the center of broach body is axially arranged with through hole, and the sidewall of through hole is provided with draw-in groove, the outer of broach body is arranged with one group of cutter tooth, cutter tooth comprises nose part, cutting portion, blade part and cutter root, blade part is positioned at inside cutter tooth, the outward flange of blade part and cutter root is stepped, cutter root radial direction is provided with shrinkage joint, cutting portion is positioned at the outside of cutter tooth, being provided with angle between the outward flange of cutting portion and broach body outer rim tangent line is angle between 10-30 °, groove is provided with between the cutter root of one of them cutter tooth and the cutting portion of adjacent cutter tooth in one group of cutter tooth, compact heap is removably connected with in groove, compact heap is installed with on the RADIAL that cutter root is provided with shrinkage joint place.
2. the inside broach as claimed in claim 1 for broaching, is characterized in that: being provided with angle between the outward flange of described cutting portion and broach body outer rim tangent line is 20 °.
3. the inside broach as claimed in claim 1 for broaching, is characterized in that: being provided with angle between the bottom of described groove and the outer peripheral tangent line of broach body is angle between 10-20 °.
4. the inside broach as claimed in claim 1 for broaching, is characterized in that: the sidewall of described groove near cutter tooth cutting portion side is inclined-plane, and the angle between inclined-plane and bottom portion of groove is between 120-130 °.
5. the inside broach for broaching as described in claim 3 or 4, is characterized in that: be crisscross arranged between the cutter tooth that the axis of one group of cutter tooth on described broach body is adjacent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645578.2A CN104353894A (en) | 2014-11-15 | 2014-11-15 | Inner broaching tool for broaching and cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645578.2A CN104353894A (en) | 2014-11-15 | 2014-11-15 | Inner broaching tool for broaching and cutting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104353894A true CN104353894A (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410645578.2A Pending CN104353894A (en) | 2014-11-15 | 2014-11-15 | Inner broaching tool for broaching and cutting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104353894A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788293A (en) * | 2018-06-29 | 2018-11-13 | 中国地质大学（武汉） | A kind of flexible broaching tool of the decarburized layer and crackle of removal drill steel inner wall |
| CN114042995A (en) * | 2021-11-11 | 2022-02-15 | 盐城工学院 | Combined broach convenient for replacing external precise spiral internal gear |
-
2014
- 2014-11-15 CN CN201410645578.2A patent/CN104353894A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788293A (en) * | 2018-06-29 | 2018-11-13 | 中国地质大学（武汉） | A kind of flexible broaching tool of the decarburized layer and crackle of removal drill steel inner wall |
| CN114042995A (en) * | 2021-11-11 | 2022-02-15 | 盐城工学院 | Combined broach convenient for replacing external precise spiral internal gear |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150218 |
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| WD01 | Invention patent application deemed withdrawn after publication |