CN108044181B - Cylinder type precise cutter cylinder for broaching - Google Patents
Cylinder type precise cutter cylinder for broaching Download PDFInfo
- Publication number
- CN108044181B CN108044181B CN201711034807.7A CN201711034807A CN108044181B CN 108044181 B CN108044181 B CN 108044181B CN 201711034807 A CN201711034807 A CN 201711034807A CN 108044181 B CN108044181 B CN 108044181B
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- China
- Prior art keywords
- cutter
- end cover
- workpiece
- cylinder
- broaching
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- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 claims description 3
- 239000010730 cutting oil Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 230000007704 transition Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010862 gear shaping Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D43/00—Broaching tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
A cylinder type precise cutter cylinder for broaching comprises a hollow outer cylinder, 9 cutter sleeves, an upper centering sleeve, a lower centering sleeve, an upper end cover, a lower end cover, a discharging mechanism, a workpiece tensioning assembly and a cutter assembly. The whole body of the outer cylinder is axially provided with a plurality of pin holes, a plurality of oil drain holes and nearly three hundred counter bores, 9 knife sleeves are in transition fit with the outer cylinder and are positioned and fixed by 9 pins, the upper and lower centering sleeves are connected with an upper end cover and a lower end cover by bolts, the lower centering sleeves are matched with a machine tool base, coaxiality of the broaching device and a machine tool hydraulic rod is guaranteed, the upper end cover and the lower end cover are connected with two ends of the outer cylinder by bolts, the lower end cover is fixed with the machine tool by bolts, and a discharging mechanism is arranged on the surface of the upper end cover and used for supporting a machined workpiece. The workpiece tensioning assembly is in contact with the inner diameter of the workpiece and is used for fixing the workpiece, and the cutter assembly comprises a rough cutter with corresponding teeth and a fine cutter with corresponding teeth.
Description
Technical Field
The invention discloses a cylinder type precise cutter cylinder for broaching, in particular to a cylinder type precise cutter cylinder for broaching for machining external splines.
Background
The external spline is an important transmission mode in the automobile gearbox, and mainly acts on the switching and transmission of each gear, and because the external spline connection mode plays a very key role in the gearbox, the requirements on the machining precision and the surface roughness of the external spline are higher. The traditional gear external tooth processing technology adopts hobbing or gear shaping, and part of the processing technology adopts milling, so that the processing technology is limited by the technology, and the high efficiency and the high precision of the processing are difficult to realize, and if the processing is carried out on a special gear hub such as incomplete teeth, the continuous hobbing processing cannot be used. Under the condition of high-speed development of the automobile industry, the processing technology cannot meet the actual production requirements of a large number of varieties.
Disclosure of Invention
The invention aims to provide a cylinder type precise cutter cylinder for broaching, which is used for realizing one-time machining and forming of external splines of a workpiece, saving machining time and improving forming rate.
The invention adopts the following technical scheme for achieving the purpose.
A cylinder type precise cutter cylinder for broaching comprises a hollow outer cylinder, 9 cutter sleeves, an upper centering sleeve, a lower centering sleeve, an upper end cover, a lower end cover, a discharging mechanism, a workpiece tensioning assembly and a cutter assembly. The whole body of the outer cylinder is axially provided with a plurality of pin holes, a plurality of oil drain holes and nearly three hundred counter bores, 9 knife sleeves are in transition fit with the outer cylinder and are positioned and fixed by 9 pins, the upper and lower centering sleeves are connected with an upper end cover and a lower end cover by bolts, the lower centering sleeves are matched with a machine tool base, coaxiality of the broaching device and a machine tool hydraulic rod is guaranteed, the upper end cover and the lower end cover are connected with two ends of the outer cylinder by bolts, the lower end cover is fixed with the machine tool by bolts, and a discharging mechanism is arranged on the surface of the upper end cover and used for supporting a machined workpiece. The workpiece tensioning assembly is in contact with the inner diameter of the workpiece and is used for fixing the workpiece, and the cutter assembly comprises a rough cutter with corresponding teeth and a fine cutter with corresponding teeth.
Further, the outer cylinder is positioned by the positioning key and the lower end cover, and the middle part of the outer cylinder is communicated with an oil pipe, so that enough cutting oil is ensured during broaching.
Further, 1-2 oil grooves are formed in the outer circles of the 9 knife sleeves, and 1-2 oil holes are formed in each tooth on the small diameter of the rectangular spline inside the knife sleeves.
Further, on the internal rectangular spline path of 9 knife sleeves, avoid the oil hole, be equipped with n guide bars, support the propeller on the circumference to guarantee the axiality of propeller and knife sleeve in the ascending process.
Further, the lower end cover and the machine tool base are consistent in circumference through the positioning key.
Further, the discharging mechanism is provided with a spring, so that the push block can be timely separated when being extruded by a workpiece, and can timely rebound to support the workpiece when not being extruded.
Further, the workpiece tensioning assembly comprises a propeller for supporting the bottom of the workpiece, a tensioning sleeve in contact with the inner diameter of the workpiece and the like.
The invention has the beneficial effects that: the invention adopts a broaching mode to process the workpiece, rough, semi-finish and finish machining of a plurality of teeth on the circumference of the workpiece can be completed by one-time broaching, compared with the traditional hobbing and gear shaping processing mode, the processing time is obviously shortened, the time for processing one product is within 1 minute, and the quality of the processed product can reach DIN3-5 level precision. Meanwhile, when a single broach is accidentally damaged, the tool cylinder can work normally again only by replacing one broach.
Drawings
Fig. 1 is a schematic diagram of the general assembly structure of a precision cartridge for cartridge broaching according to the present invention.
Fig. 2 is a schematic drawing showing the distribution of broaches in a precision tool cartridge for cartridge broaching according to the present invention.
Fig. 3 is a bottom view of a precision tool cartridge for cartridge broaching according to the present invention.
Fig. 4 is a schematic view of a precision tool for barrel broaching according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings for the purpose of making the objects and technical solutions of the invention more apparent.
Referring to fig. 1-3, a precision cutter cylinder for barrel broaching comprises an outer barrel 1, 9 cutter sleeves 15, an upper centering sleeve 3, a lower centering sleeve 19, an upper end cover 2, a lower end cover 7, a discharging mechanism 4, a workpiece tensioning assembly 5 and a cutter assembly 14. The outer cylinder is provided with a plurality of counter bores 12 axially according to the interval of broach bottom holes, 11 rows (the number of teeth of a workpiece 21) are arranged in total, the middle part is provided with two large oil holes 11, the inner holes of which the two sides are 15mm away from the end face are provided with 2x1 countersunk cuts, the countersunk cuts can be used as positioning marks when the small knife sleeve is installed, and the outer cylinder 1 and the small knife sleeve are positioned by pins 16.
The cutter sleeve 15 is internally provided with a plurality of guide strips 13 for ensuring the coaxiality of the propeller 6 and the outer barrel 1, the cutter groove 20 in the cutter sleeve 15 is annularly provided with a plurality of broaches 14, and when the broaches 14 are installed, the tail ends of the broaches 14 are provided with cushion blocks with different thicknesses, so that staggered tooth structures are formed, and resonance phenomenon is avoided; the circumference of the upper end cover 2 is provided with two oil holes 17 which are connected with the upper centering sleeve 3 by bolts, and the discharging mechanism 4 is arranged on the surface of the upper end cover 2 by bolts; the lower centering sleeve 19 is connected with the lower end cover 7 through bolts, the lower end cover 7 is fixed on a machine tool base through bolts, the lower end cover 7 is provided with two key grooves, and the two key grooves are positioned through positioning keys 8 so as to ensure the circumferential position relation between the lower end cover 7 and the outer cylinder 1; the positioning key 9 is used for positioning, so that the position relationship between the lower end cover 7 and the circumference of the machine tool can be ensured.
During broaching, a workpiece 21 is placed on the upper surface of the propeller 6, the inner diameter of the workpiece is in contact with the workpiece tensioning assembly 5, the workpiece moves from bottom to top under the action of a hydraulic rod of a machine tool, is guided by the lower centering sleeve 19, is simultaneously broached by a plurality of broaches 14 in a circular direction for one-step forming, and continuously moves upwards to extrude the push block 18 in the discharging assembly 4 after the broaching is finished, so that the push block 18 is timely separated, and when the workpiece 21 is higher than the discharging assembly 4, the push block 18 rebounds, supports the workpiece and prevents the workpiece from falling when the hydraulic rod falls back.
After a certain number of workpieces are broached by the cylinder type broaching precision knife cylinder, the broach 14 is worn, bolts in the outer cylinder counter bore 12 are loosened, and a new broach or a broach after being polished is replaced, so that the machining can be continued. The single broach 14 is accidentally damaged in the use process, and the whole cutter barrel can work normally only by replacing the single broach.
Summary
When the cylinder type precise cutter cylinder for broaching is used for broaching, lubricating oil enters the outer cylinder from a large oil hole in the outer cylinder, and enters the inner part of the small cutter sleeve through an oil through groove and an oil through hole on the small cutter sleeve, so that a cutter and a workpiece are lubricated, friction force in the cutting process is reduced, and cutter abrasion is reduced.
The 9 knife sleeves are sequentially placed in the outer cylinder at equal intervals from top to bottom, the outer circumferences of the knife sleeves are in clearance fit with the inner circumference of the outer cylinder, and each knife sleeve is positioned with the outer cylinder through pins.
11 guide grooves are formed in the annular direction on each cutter sleeve, threaded holes are formed in the centers of the cutter mounting grooves, threaded counter bores are formed in the outer cylinder, when the cutter sleeves are mounted in the outer cylinder, the threaded holes of the cutter mounting grooves are aligned with the threaded counter bores on the outer cylinder, so that bolts can be inserted to fixedly connect the broach and the cutter sleeves, and when the broach is mounted to the cutter mounting grooves, cushion blocks with different thicknesses are arranged at the tail ends of the broach, so that staggered tooth structures are formed, and resonance phenomena are avoided.
And guide strips are arranged on the small diameter of the internal rectangular spline of the knife sleeve every other tooth, and the propeller is supported on the circumference so as to ensure the coaxiality of the propeller and the knife sleeve in the ascending process.
The cylinder type precise broaching tool cylinder is provided with a discharging mechanism and a workpiece tensioning assembly, the discharging mechanism is provided with a spring, so that the push block can be timely separated when being extruded by a workpiece, and can timely rebound to support the workpiece when not being extruded; the workpiece tensioning assembly comprises a propeller for supporting the bottom of the workpiece, a tensioning sleeve contacted with the inner diameter of the workpiece, and the like.
Claims (5)
1. A precision cutter drum for drum broaching, comprising:
the outer cylinder (1) is axially provided with a plurality of pin holes, a plurality of oil drain holes and approximately three hundred counter bores on the whole body, and the middle part is communicated with an oil pipe so as to ensure enough cutting oil during broaching;
the 9 knife sleeves (15) are excessively matched with the outer cylinder (1), and are positioned and fixed on the inner wall of the outer cylinder (1) by 9 pins (16); an upper centering sleeve (3);
a lower centering sleeve (19) which is matched with the machine tool base to ensure the coaxiality of the cylinder type broaching precision cutter cylinder and the machine tool hydraulic rod;
an upper end cover (2) connected with the upper end of the outer cylinder (1) by bolts;
the lower end cover (7) is connected with the lower end of the outer cylinder (1) through bolts and is also fixed with a machine tool through bolts;
a discharging mechanism (4) which is arranged on the surface of the upper end cover (2) by bolts and is used for supporting the processed workpiece (21); the workpiece tensioning assembly (5) comprises a tensioning sleeve for supporting a propeller (6) at the bottom of the workpiece to be in contact with the inner diameter of the workpiece;
a cutter assembly (14) comprising a coarse cutter with corresponding teeth numbers, a fine cutter with corresponding teeth numbers;
the upper centering sleeve (3) is connected with the upper end cover (2) through bolts, and the lower centering sleeve (19) is connected with the lower end cover (7) through bolts;
the lower end cover (7) is provided with two key grooves, and is positioned by a positioning key (8) to ensure the circumferential position relationship between the lower end cover (7) and the outer cylinder (1); positioning is performed by using a positioning key (9) to ensure the position relationship between the lower end cover (7) and the circumference of the machine tool.
2. The precise cutter cylinder for barrel broaching according to claim 1, wherein 1 to 2 oil grooves are formed in the outer circle of the 9 cutter sleeves (15), and 1 to 2 oil holes are formed in each tooth on the minor diameter of the rectangular spline inside the cutter sleeve (15).
3. The precise cutter cylinder for barrel broaching according to claim 1, wherein n guide strips (13) are arranged on the small diameter of the rectangular spline inside the 9 cutter sleeves (15) to avoid oil holes, and the propeller (6) is supported on the circumference so as to ensure the coaxiality of the propeller (6) and the cutter sleeves (15) in the ascending process.
4. A precision tool cartridge for cartridge broaching according to claim 1, in which the discharge means (4) is spring loaded to ensure that the push block (18) is able to separate in time when pressed against a workpiece and rebound in time to support the workpiece when not pressed.
5. The precise cutter cylinder for barrel broaching according to claim 1, wherein cutter grooves (20) in the 9 cutter sleeves (15) are circumferentially provided with cutter assemblies (14), and when the cutter assemblies (14) are installed, cushion blocks with different thicknesses are arranged at the tail ends of the cutter assemblies so as to form staggered tooth structures and avoid resonance phenomenon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034807.7A CN108044181B (en) | 2017-10-30 | 2017-10-30 | Cylinder type precise cutter cylinder for broaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034807.7A CN108044181B (en) | 2017-10-30 | 2017-10-30 | Cylinder type precise cutter cylinder for broaching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108044181A CN108044181A (en) | 2018-05-18 |
| CN108044181B true CN108044181B (en) | 2024-02-13 |
Family
ID=62118531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711034807.7A Active CN108044181B (en) | 2017-10-30 | 2017-10-30 | Cylinder type precise cutter cylinder for broaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108044181B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719345A (en) * | 2019-01-25 | 2019-05-07 | 恒锋工具股份有限公司 | A kind of barrel type pull broach with cooling bath |
| CN111531222A (en) * | 2020-06-02 | 2020-08-14 | 南通新冯精密机械有限公司 | High-efficient high-precision numerical control appearance processing equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003225827A (en) * | 2002-02-05 | 2003-08-12 | Nachi Fujikoshi Corp | Broaching jig |
| DE202007010370U1 (en) * | 2007-07-26 | 2007-09-27 | Antonio Basile Gmbh | Expansion Bolts |
| JP2007268663A (en) * | 2006-03-31 | 2007-10-18 | Nachi Fujikoshi Corp | Synchro sleeve inner diameter broaching tool |
| CN101774044A (en) * | 2010-03-12 | 2010-07-14 | 扬州大学 | Numerical control opening and closing profile broaching machine |
| CN203900617U (en) * | 2014-04-08 | 2014-10-29 | 天津天海同步科技股份有限公司 | Inner locking push-type broach |
| CN105364194A (en) * | 2015-11-18 | 2016-03-02 | 恒锋工具股份有限公司 | Large-diameter internal gear broaching tool with long rear handle |
| CN206484106U (en) * | 2016-12-22 | 2017-09-12 | 汉德车桥(株洲)齿轮有限公司 | A kind of big broaching tool of a pulling shaping |
| CN207479730U (en) * | 2017-10-30 | 2018-06-12 | 恒锋工具股份有限公司 | A kind of accurate knife cylinder of cartridge type broaching |
-
2017
- 2017-10-30 CN CN201711034807.7A patent/CN108044181B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003225827A (en) * | 2002-02-05 | 2003-08-12 | Nachi Fujikoshi Corp | Broaching jig |
| JP2007268663A (en) * | 2006-03-31 | 2007-10-18 | Nachi Fujikoshi Corp | Synchro sleeve inner diameter broaching tool |
| DE202007010370U1 (en) * | 2007-07-26 | 2007-09-27 | Antonio Basile Gmbh | Expansion Bolts |
| CN101774044A (en) * | 2010-03-12 | 2010-07-14 | 扬州大学 | Numerical control opening and closing profile broaching machine |
| CN203900617U (en) * | 2014-04-08 | 2014-10-29 | 天津天海同步科技股份有限公司 | Inner locking push-type broach |
| CN105364194A (en) * | 2015-11-18 | 2016-03-02 | 恒锋工具股份有限公司 | Large-diameter internal gear broaching tool with long rear handle |
| CN206484106U (en) * | 2016-12-22 | 2017-09-12 | 汉德车桥(株洲)齿轮有限公司 | A kind of big broaching tool of a pulling shaping |
| CN207479730U (en) * | 2017-10-30 | 2018-06-12 | 恒锋工具股份有限公司 | A kind of accurate knife cylinder of cartridge type broaching |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108044181A (en) | 2018-05-18 |
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