CN209021368U - A kind of high-precision external gear broaching tool - Google Patents
A kind of high-precision external gear broaching tool Download PDFInfo
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- CN209021368U CN209021368U CN201821051202.9U CN201821051202U CN209021368U CN 209021368 U CN209021368 U CN 209021368U CN 201821051202 U CN201821051202 U CN 201821051202U CN 209021368 U CN209021368 U CN 209021368U
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- gear
- broaching
- gear ring
- rack
- tooth
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Abstract
The utility model relates to gear cutting tool technical fields, it discloses a kind of high-precision external gear broaching tools, including barrel-type tool apron, broaching module on the barrel-type tool apron inner cylinder, the broaching module includes rack gear broaching group, gear ring broaching group, the rack gear broaching group includes a number of rack gear parallel with the axis of the barrel-type tool apron inner cylinder, and the rack gear is uniformly distributed in the circumferencial direction of the barrel-type tool apron inner cylinder, the gear ring broaching group includes a number of gear ring coaxial with the barrel-type tool apron inner cylinder, the rack gear, which is equipped with, is used for the rough rack cutting tooth for cutting external gear, the gear ring includes the broaching gear ring that external gear is cut for finish draw and the correction gear ring for correcting cutting external gear, the broaching gear ring is equipped with gear ring cutting tooth, the correction gear ring is equipped with gear ring and corrects tooth.The processing efficiency and processing quality of external gear processing can be improved in the utility model, while can reduce the cost of charp tool, improve cutter life.
Description
Technical field
The utility model relates to gear cutting tool technical fields, and in particular to a kind of high-precision external gear broaching tool.
Background technique
At present for the processing of external gear, generalling use traditional hobbing processes and gear shaping technique, precision be can achieve, but
It is inefficient.By taking the external tooth of modulus 3.5m m, diameter 150m m or so as an example, gear hobbing process is needed more than 30 minutes, Gear Shaping
It needs more than 50 minutes, does not adapt to the demand produced in enormous quantities much.Therefore, occur carrying out whole broaching for external gear wheel
External gear broaching tool.
But there is also some problems for external gear broaching tool in the prior art: first is that broaching tool structure is rack-and-pinion combination knot
Structure or long sectorial block composite structure, machining accuracy it is difficult to ensure that, second is that broaching tool abrasion after be not easy to repair, lead to the cost of charp tool
It is higher.
Utility model content
To solve the above-mentioned problems, the utility model proposes a kind of high-precision external gear broaching tools, it is intended to improve external gear and add
The processing efficiency and processing quality of work, while reducing the cost of charp tool.Specific technical solution is as follows:
A kind of high-precision external gear broaching tool, including barrel-type tool apron, the broaching on the barrel-type tool apron inner cylinder
Module, the broaching module include for the rough rack gear broaching group cut, the gear ring broaching group cut for finish draw, and the rack gear is drawn
The first half for being mounted on the barrel-type tool apron inner cylinder is cut, the gear ring broaching is mounted on the barrel-type tool apron inner cylinder
Latter half of, the rack gear broaching group includes a number of rack gear parallel with the axis of the barrel-type tool apron inner cylinder, and institute
The circumferencial direction that rack gear is stated in the barrel-type tool apron inner cylinder is uniformly distributed, and the gear ring broaching group includes a number of and institute
State the coaxial gear ring of barrel-type tool apron inner cylinder, and the gear ring in the barrel-type tool apron inner cylinder along axial direction successively adjacent company
It connects, the rack gear, which is equipped with, is used for the rough rack cutting tooth for cutting external gear, and the gear ring includes cutting external gear for finish draw
Broaching gear ring and correction gear ring for correct cutting external gear, the broaching gear ring is equipped with gear ring cutting tooth, the correction
Gear ring is equipped with gear ring and corrects tooth.
In above-mentioned technical proposal, broaching module includes drawing for the rough rack gear broaching group cut, the gear ring cut for finish draw
Group is cut, realizes that the high-precision of external gear is broached by the combination of rack gear broaching group and gear ring broaching group.
Wherein, the rack cutting tooth in the rack gear broaching group is generating broaching cutting tooth.The tooth top of generating broaching cutting tooth is
Main cutting edge is incremented by by tooth by tooth top blade and forms part tooth form, and general facewidth direction is stayed more than 0.08~0.10m m finish draw
Amount, full tooth depth are worked into size.
Wherein, the gear ring cutting tooth in the gear ring broaching group is same wide formula cutting tooth, the tooth in the gear ring broaching group
Circle correction tooth is to correct tooth with wide formula.Flank with exterior feature formula cutting tooth is main cutting edge, passes through thickening by tooth by last for the facewidth
One fine cut gear ring finally shapes.
In the utility model, finishing is that processing technology is strong using its advantage of gear ring structure, and Yi Shixian is in gear testing
The composition errors such as tooth pitch accumulation, profile geometry are directly measured on center.
The setting of generating broaching cutting tooth in above-mentioned rack gear broaching group, so that the rough efficiency cut is higher；And gear ring broaching group
In with wide formula cutting tooth, with the setting of wide formula correction tooth, it is ensured that the external gear precision with higher after broaching.
In the utility model, the specific mounting structure of rack gear and barrel-type tool apron inner cylinder are as follows: the barrel-type tool apron
Inner cylinder is equipped with rack gear mounting groove, and the rack gear is positioned in the rack gear mounting groove and is fastened on the cylinder by screw
On formula tool apron inner cylinder.
It is arranged between the rack gear and the slot bottom of the rack gear mounting groove as a further improvement of the utility model, useful
Its rack gear is enabled to repair the adjustment gasket utilized after rack gear abrasion.
In view of external gear broaching tool is a kind of very high cutter of cost, the high-speed steel or cemented carbide material of consumption are more,
For the processing compared with gear wheel, usual one group of broaching tool institute's consumption material is at several hundred kilograms or more, therefore above-mentioned rack gear and the rack gear
The setting that gasket is adjusted between the slot bottom of mounting groove is conducive to external gear broaching tool using the reparation after abrasion, can pass through
The old cutter tooth having worn away on original rack gear is removed, grinds new tooth again after destressing processing, and replace the adjustment of suitable thickness
Gasket, to keep the original of external gear wheel rough to cut size.Such structure can make rack gear realization repeatedly reface, thus
The cost of charp tool is greatly lowered.
Specific mounting structure in the utility model, between the gear ring, between gear ring and barrel-type tool apron inner cylinder are as follows:
The gear ring is positioned in the inner hole of the barrel-type tool apron inner cylinder, and rectangular opening, each tooth are provided in the axial direction on the gear ring
Circle realizes circumferentially opposed fixation, the outer circle of the gear ring and the barrel-type tool apron by the internal key being installed in the rectangular opening
It is circumferentially positioned by the realization of outer key connection between the inner hole of inner cylinder.
As a kind of preferred embodiment of rectangular opening, the quantity of rectangular opening is 2~4 on each gear ring.
As the further improvement to rectangle pore structure, offered on the rectangular opening in the same process to each
The notch of rectangular opening progress Numerical Control Wire Cutting.
The setting of digital control wire-electrode cutting notch on the rectangular opening of above-mentioned gear ring, can be effectively ensured the position of each rectangular opening
Precision, and then guarantee the relative positional accuracy of rectangular opening and gear ring cutting tooth or gear ring correction tooth, it is drawn to be more advantageous to guarantee
The quality cut.
In the utility model, in the rack gear broaching group, rack gear is divided into several groups, the rack cutting tooth on every group of rack gear
Setting is axially being mutually staggered with the rack cutting tooth on another group of rack gear.
The setting that rack gear is grouped and mutually staggers the rack cutting tooth on rack gear in above-mentioned rack gear broaching group,
On the one hand the chip space of rake face on rack cutting tooth can be allowed to be improved, so that chip removal is more smooth, on the other hand cut
Sword is circumferentially grouped incision, cuts out, and can reduce total cutting force so that broaching during cut it is more stable, be conducive to compared with
Shaochong hits, eliminates covibration, so that workpiece is in the rough cutting deformation very little for cutting the stage, to be conducive to final processing ruler
Very little precision, geometric tolerance and surface roughness fully ensure that, while also improving the service life of cutter, and to promote broaching speed
Degree, raising processing efficiency create advantage.
In the utility model, the rack gear is high-speed steel rack gear or hard alloy rack gear, and the gear ring is high-speed steel gear ring
Or hard alloy gear ring.
The beneficial effects of the utility model are:
First, a kind of high-precision external gear broaching tool of the utility model, broaching module includes drawing for the rough rack gear cut
The gear ring broaching group cutting group, cutting for finish draw realizes the height of external gear by the combination of rack gear broaching group and gear ring broaching group
Precision broaching；Moreover, in rack gear broaching group generating broaching cutting tooth setting so that the rough efficiency cut is higher；And gear ring is broached
With exterior feature formula cutting tooth, with the setting of wide formula correction tooth in group, it is ensured that the external gear precision with higher after broaching.Cause
This, the external gear broaching tool of the utility model has comprehensive performance high in machining efficiency, processing quality is good.
Second, a kind of high-precision external gear broaching tool of the utility model, between rack gear and the slot bottom of the rack gear mounting groove
The setting for adjusting gasket is conducive to reparation of the external gear broaching tool after using abrasion, can be by will grind on original rack gear
The old cutter tooth of damage removes, and grinds new tooth again after destressing processing, and replace the adjustment gasket of suitable thickness, to keep to external tooth
The original of wheel rough cuts size.Such structure can make rack gear realization repeatedly reface, thus be greatly lowered cutter at
This.
Third, a kind of high-precision external gear broaching tool of the utility model, digital control wire-electrode cutting notch on the rectangular opening of gear ring
Setting, the position precision of each rectangular opening can be effectively ensured, and then guarantee that rectangular opening and gear ring cutting tooth or gear ring correct
The relative positional accuracy of tooth, to be more advantageous to the quality for guaranteeing broaching.
4th, rack gear is grouped and is incited somebody to action in rack gear broaching group by a kind of high-precision external gear broaching tool of the utility model
The setting that rack cutting tooth on rack gear mutually staggers, one side can allow the chip space of rake face on rack cutting tooth to obtain
To improvement, so that chip removal is more smooth, another aspect cutting edge is circumferentially grouped incision, cuts out, and can reduce total cutting force,
So that broaching during cut it is more stable, be conducive to it is less impact, eliminate covibration so that workpiece cuts cutting for stage rough
Deformation very little is cut, thus be conducive to fully ensuring that for final accurate to dimension, geometric tolerance and surface roughness, while
The service life of cutter is improved, and creates advantage to promote broaching speed, improving processing efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high-precision external gear broaching tool of the utility model；
Fig. 2 is the structural schematic diagram of the gear ring in Fig. 1；
Fig. 3 is the section view of the barrel-type tool apron and rack gear mutual alignment relation in Fig. 1；
Fig. 4 is the structural schematic diagram of the rack gear in Fig. 1；
Fig. 5 is the K direction view (partial enlarged view) of Fig. 4.
In figure: 1, barrel-type tool apron, 2, rack gear, 3, gear ring, 4, rack cutting tooth, 5, broaching gear ring, 6, correction gear ring, 7,
Gear ring cutting tooth, 8, gear ring correction tooth, 9, rack gear mounting groove, 10, screw, 11, internal key, 12, adjustment gasket, 13, rectangular opening,
14, external key, 15, notch, 16, the notch of external key is installed on gear ring.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below
Example is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility model
It encloses.
Embodiment 1:
As Fig. 1 to 5 show a kind of embodiment of high-precision external gear broaching tool of the utility model, including barrel-type tool apron
1, the broaching module on 1 inner cylinder of barrel-type tool apron, the broaching module include for the rough rack gear broaching cut
Group, the gear ring broaching group cut for finish draw, the rack gear broaching are mounted on the first half of 1 inner cylinder of barrel-type tool apron, institute
It states gear ring broaching and is mounted on the latter half of of 1 inner cylinder of barrel-type tool apron, the rack gear broaching group includes a number of and institute
The parallel rack gear 2 of the axis of 1 inner cylinder of barrel-type tool apron is stated, and the rack gear 2 is in the circumference of 1 inner cylinder of barrel-type tool apron
Direction is uniformly distributed, and the gear ring broaching group includes a number of gear ring 3 coaxial with 1 inner cylinder of barrel-type tool apron, and
In 1 inner cylinder of barrel-type tool apron along axial direction successively adjacent connection, the rack gear 2 is equipped with to be cut the gear ring 3 for rough
The rack cutting tooth 4 of external gear, the gear ring 3 include the broaching gear ring 5 of external gear being cut for finish draw and for correcting outside cutting
The correction gear ring 6 of gear, the broaching gear ring 5 are equipped with gear ring cutting tooth 7, and the correction gear ring 6 is equipped with gear ring and corrects tooth
8。
In above-mentioned technical proposal, broaching module includes drawing for the rough rack gear broaching group cut, the gear ring cut for finish draw
Group is cut, realizes that the high-precision of external gear is broached by the combination of rack gear broaching group and gear ring broaching group.
Wherein, the rack cutting tooth 4 in the rack gear broaching group is generating broaching cutting tooth.The tooth top of generating broaching cutting tooth is
Main cutting edge is incremented by by tooth by tooth top blade and forms part tooth form, and general facewidth direction is stayed more than 0.08~0.10m m finish draw
Amount, full tooth depth are worked into size.
Wherein, the gear ring cutting tooth 7 in the gear ring broaching group is same wide formula cutting tooth, the tooth in the gear ring broaching group
Circle correction tooth 8 is to correct tooth with wide formula.Flank with exterior feature formula cutting tooth is main cutting edge, passes through thickening by tooth by last for the facewidth
One fine cut gear ring finally shapes.
The setting of generating broaching cutting tooth in above-mentioned rack gear broaching group, so that the rough efficiency cut is higher；And gear ring broaching group
In with wide formula cutting tooth, with the setting of wide formula correction tooth, it is ensured that the external gear precision with higher after broaching.
In the present embodiment, finishing is that processing technology is strong using its advantage of 3 structure of gear ring, and Yi Shixian is in gear testing
The composition errors such as tooth pitch accumulation, profile geometry are directly measured in the heart.
In the present embodiment, the specific mounting structure of rack gear 2 and 1 inner cylinder of barrel-type tool apron are as follows: the barrel-type tool apron 1
Inner cylinder is equipped with rack gear mounting groove 9, and the rack gear 2 is positioned in the rack gear mounting groove 9 and is fastened on institute by screw 10
It states on 1 inner cylinder of barrel-type tool apron.
As further improvement of this embodiment, it is arranged between the rack gear 2 and the slot bottom of the rack gear mounting groove 9 useful
Its rack gear 2 is enabled to repair the adjustment gasket 12 utilized after the abrasion of rack gear 2.
In view of external gear broaching tool is a kind of very high cutter of cost, the high-speed steel or cemented carbide material of consumption are more,
For the processing compared with gear wheel, usual one group of broaching tool institute's consumption material is at several hundred kilograms or more, therefore above-mentioned rack gear 2 and the rack gear
The setting that gasket 12 is adjusted between the slot bottom of mounting groove 9 is conducive to external gear broaching tool using the reparation after abrasion, can lead to
It crosses and removes the old cutter tooth having worn away on original rack gear 2, grind new tooth again after destressing processing, and replace the tune of suitable thickness
Whole gasket 12, to keep the original of external gear wheel rough to cut size.Such structure can make rack gear 2 realize multiple weight
Mill, so that the cost of charp tool be greatly lowered.
Specific mounting structure in the present embodiment, between the gear ring 3, between 1 inner cylinder of gear ring 3 and barrel-type tool apron
Are as follows: the gear ring 3 is positioned in the inner hole of 1 inner cylinder of barrel-type tool apron, is provided in the axial direction with rectangular opening on the gear ring 3
13, each gear ring 3 realizes circumferentially opposed fixation by the internal key 11 being installed in the rectangular opening 13, the outer circle of the gear ring 3 with
It is circumferentially positioned by the connection realization of external key 14 between the inner hole of 1 inner cylinder of barrel-type tool apron.
As a kind of preferred embodiment of rectangular opening 13, the quantity of rectangular opening 13 is 2~4 on each gear ring 3.
As the further improvement to 13 structure of rectangular opening, offered on the rectangular opening 13 for right in the same process
Each rectangular opening 13 carries out the notch 15 of Numerical Control Wire Cutting.
The setting of digital control wire-electrode cutting notch on the rectangular opening 13 of above-mentioned gear ring 3, can be effectively ensured each rectangular opening 13
Position precision, and then guarantee the relative positional accuracy of rectangular opening 13 and gear ring cutting tooth 7 or gear ring correction tooth 8, to more have
Conducive to the quality for guaranteeing broaching.
In the present embodiment, in the rack gear broaching group, rack gear 2 is divided into several groups, the rack cutting tooth on every group of rack gear
Setting is axially being mutually staggered with the rack cutting tooth on another group of rack gear.
The setting that rack gear 2 is grouped and mutually staggers the rack cutting tooth 4 on rack gear in above-mentioned rack gear broaching group,
Its one side can allow the chip space of rake face on rack cutting tooth 4 to be improved, so that chip removal is more smooth, on the other hand cut
It cuts sword to be circumferentially grouped incision, cut out, total cutting force can be reduced, so that cutting more stable during broaching, be conducive to
Covibration is eliminated in less impact, so that workpiece is in the rough cutting deformation very little for cutting the stage, to be conducive to final processing
Dimensional accuracy, geometric tolerance and surface roughness fully ensure that, while also improving the service life of cutter, and to promote broaching speed
Degree, raising processing efficiency create advantage.
In the present embodiment, the rack gear 2 is high-speed steel rack gear or hard alloy rack gear, and the gear ring 3 is high-speed steel gear ring
Or hard alloy gear ring.
Embodiment 2:
The broaching of external gear is carried out using the external gear broaching tool of embodiment 1, backgear of broaching to it does accuracy of gear detection
Evaluation.Concrete outcome is as follows:
Gear parameter are as follows: normal module mn=3.4887, number of teeth z=40, gear moral conduct are straight trough, pressure angle an=
31.5 °, facewidth 17.5mm.
Broaching tool major design manufacturing technology index: total cumulative pitch error≤0.01m m；Profile error≤0.005mm；Broaching tool
Rack linear degree error ± 0.01, broaching tool gear ring flatness error ± 0.005.
The external gear processed using the broaching tool of the present embodiment, detects its precision, and with chinese national standard GB/T10095
Algnment accuracy index specified in (The Accuracy of Involute Cylindrical Gear) compares, as a result as shown in the table:
It can be seen that, total cumulative pitch error, profile error have reached 6 class precisions, teeth directional after part broaching from upper table
Error reaches 7 class precisions, fully meets manufacture demand.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (10)
1. a kind of high-precision external gear broaching tool, which is characterized in that including barrel-type tool apron, be set to the barrel-type tool apron inner cylinder
On broaching module, the broaching module includes for the rough rack gear broaching group cut, the gear ring broaching group cut for finish draw, institute
The first half that rack gear broaching is mounted on the barrel-type tool apron inner cylinder is stated, the gear ring broaching is mounted on the barrel-type tool apron
Inner cylinder it is latter half of, the rack gear broaching group includes a number of tooth parallel with the axis of the barrel-type tool apron inner cylinder
Item, and the rack gear is uniformly distributed in the circumferencial direction of the barrel-type tool apron inner cylinder, the gear ring broaching group includes several
The quantity gear ring coaxial with the barrel-type tool apron inner cylinder, and the gear ring the barrel-type tool apron inner cylinder along axial direction according to
Secondary adjacent connection, the rack gear, which is equipped with, is used for the rough rack cutting tooth for cutting external gear, and the gear ring includes cutting for finish draw
The broaching gear ring of external gear and correction gear ring for correcting cutting external gear, the broaching gear ring equipped with gear ring cutting tooth,
The correction gear ring is equipped with gear ring and corrects tooth.
2. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that the tooth in the rack gear broaching group
Cutting tooth is generating broaching cutting tooth.
3. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that the tooth in the gear ring broaching group
Enclosing cutting tooth is same wide formula cutting tooth, and the gear ring correction tooth in the gear ring broaching group is to correct tooth with exterior feature formula.
4. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that the barrel-type tool apron inner cylinder
It is equipped with rack gear mounting groove, the rack gear is positioned in the rack gear mounting groove and is fastened on the barrel-type tool apron by screw
On inner cylinder.
5. a kind of high-precision external gear broaching tool according to claim 4, which is characterized in that the rack gear and the rack gear are pacified
It is provided between the slot bottom of tankage for enabling its rack gear to repair the adjustment gasket utilized after rack gear abrasion.
6. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that the gear ring is positioned at the cylinder
In the inner hole of body formula tool apron inner cylinder, rectangular opening is provided in the axial direction on the gear ring, each gear ring is by being installed on the rectangle
Internal key in hole realizes circumferentially opposed fixation, passes through between the outer circle of the gear ring and the inner hole of the barrel-type tool apron inner cylinder
Outer key connection is realized circumferentially positioned.
7. a kind of high-precision external gear broaching tool according to claim 6, which is characterized in that rectangular opening on each gear ring
Quantity be 2~4.
8. a kind of high-precision external gear broaching tool according to claim 7, which is characterized in that opened up on the rectangular opening useful
In the notch for carrying out Numerical Control Wire Cutting to each rectangular opening in the same process.
9. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that in the rack gear broaching group,
Rack gear is divided into several groups, and the rack cutting tooth on every group of rack gear is mutually staggered with the rack cutting tooth on another group of rack gear axially
Setting.
10. a kind of high-precision external gear broaching tool according to claim 1, which is characterized in that the rack gear is high-speed steel tooth
Item or hard alloy rack gear, the gear ring are high-speed steel gear ring or hard alloy gear ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821051202.9U CN209021368U (en) | 2018-07-04 | 2018-07-04 | A kind of high-precision external gear broaching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821051202.9U CN209021368U (en) | 2018-07-04 | 2018-07-04 | A kind of high-precision external gear broaching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209021368U true CN209021368U (en) | 2019-06-25 |
Family
ID=66868451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821051202.9U Active CN209021368U (en) | 2018-07-04 | 2018-07-04 | A kind of high-precision external gear broaching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209021368U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042995A (en) * | 2021-11-11 | 2022-02-15 | 盐城工学院 | Combined broach convenient for replacing external precise spiral internal gear |
| CN116275930A (en) * | 2023-03-07 | 2023-06-23 | 江阴塞特精密工具有限公司 | Manufacturing process of external tooth broach |
-
2018
- 2018-07-04 CN CN201821051202.9U patent/CN209021368U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042995A (en) * | 2021-11-11 | 2022-02-15 | 盐城工学院 | Combined broach convenient for replacing external precise spiral internal gear |
| CN116275930A (en) * | 2023-03-07 | 2023-06-23 | 江阴塞特精密工具有限公司 | Manufacturing process of external tooth broach |
| CN116275930B (en) * | 2023-03-07 | 2023-09-01 | 江阴塞特精密工具有限公司 | Manufacturing process of external tooth broach |
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