CN107234288A - Herringbone bear inner hole key slot symmetrical machining frock and processing method - Google Patents
Herringbone bear inner hole key slot symmetrical machining frock and processing method Download PDFInfo
- Publication number
- CN107234288A CN107234288A CN201710677030.XA CN201710677030A CN107234288A CN 107234288 A CN107234288 A CN 107234288A CN 201710677030 A CN201710677030 A CN 201710677030A CN 107234288 A CN107234288 A CN 107234288A
- Authority
- CN
- China
- Prior art keywords
- herringbone bear
- hole
- teeth groove
- frock
- key slot
- 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
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D3/00—Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line
- B23D3/02—Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line for cutting grooves
-
- 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
- B23D7/00—Planing or slotting machines characterised only by constructional features of particular parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
Herringbone bear inner hole key slot symmetrical machining frock and processing method, herringbone bear inner hole key slot symmetrical machining frock, including frock body, the frock body is respectively equipped with positioning hole and teeth groove positioning hole along centerline direction two ends, benchmark keyway is respectively equipped with along along the frock body of the centerline direction positioning hole left and right sides, frock body is provided with some screwed holes from top to bottom on the side wall provided with teeth groove positioning hole, screwed hole is centrally located on the wall center line of side, positioning hole is provided with positioning sleeve, teeth groove positioning hole is provided with teeth groove locating shaft, screwed hole is provided with adjusting screw, it has reasonable in design, utilize the herringbone bear reference circle transverse profile flank of tooth and Internal hole positioning, control symmetrically to ensure herringbone increment face teeth groove center by key slot side in frock, inner hole key slot center and centerline hole must be on the same line technical requirements, improve the crudy of workpiece.
Description
Technical field：
The present invention relates to herringbone bear keyway Symmetry working tech field, and in particular to herringbone bear inner hole key slot symmetrically adds
Work frock and processing method.
Background technology：
Continued to develop with manufacturing, all trades and professions all propose higher requirement to the quality of product, it is particularly near
Several years, national auto industry was developed rapidly, and consumer proposes higher requirement to the quality of automobile product, incident to be exactly
Required precision of the sedan limousine to forging equipment is more and more tighter, and the competition for forging and pressing manufacturing is also more and more fierce.Therefore, how
The running precision of the forging equipments such as punching machine is improved, production efficiency is improved, reduction production cost is urgent problem.
It is herringbone bear in the middle of critical component in straight side double crank press transmission system or so, the part requirement herringbone as shown in Figure 1
Gear face teeth groove center, inner hole key slot center and centerline hole must on the same line, franchise 0.04mm, if in left and right
Between two keyways of herringbone bear machining accuracy it is inconsistent, can influence the synchronism of left linkages, reduce forcing press precision.As schemed
Existing herringbone bear keyway processing method shown in 2, first with keyway scoring tool on herringbone bear end face to middle line,
Then by end face rule centered on draw circle, diameter of a circle be equal to width of keyway, finally mark keyway line, thick keyseat, two sides
Common made allowance 2mm, bottom land is worked into dimension line, and above-mentioned keyway processing method operates comparatively laborious, machining accuracy to be difficult to ensure that, key
It can not be measured after the completion of groove processing, can only can just reflect quality problems until assembling, integrally assemble and caused very to forcing press
It is more inconvenient.
The content of the invention：
The purpose of the present invention is exactly that there is provided herringbone bear inner hole key slot symmetrical machining in order to make up the deficiencies in the prior art
Frock and processing method, it has reasonable in design, using the herringbone bear reference circle transverse profile flank of tooth and Internal hole positioning, leans on
Key slot side control symmetrically ensures that herringbone increment face teeth groove center, inner hole key slot center and centerline hole must be same in frock
Technical requirements on one straight line, improve the crudy of workpiece, solve problems of the prior art.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem：
Herringbone bear inner hole key slot symmetrical machining frock, including frock body, the frock body is along centerline direction two
End is respectively equipped with positioning hole and teeth groove positioning hole, and base is respectively equipped with along along the frock body of the centerline direction positioning hole left and right sides
Quasi- keyway, frock body is provided with some screwed holes, screwed hole centre bit from top to bottom on the side wall provided with teeth groove positioning hole
In on the wall center line of side, positioning hole is provided with positioning sleeve, and teeth groove positioning hole is provided with teeth groove locating shaft, and screwed hole is provided with adjustment
Screw.
The teeth groove positioning holes center is equal to herringbone bear reference radius to positioning holes center distance.
Positioning sleeve lower end external diameter is equal to herringbone bear center-hole diameter.
The positioning sleeve cross section is boss structure, and mounting surface is left in the position of positioning sleeve correspondence benchmark keyway.
Central Symmetry is provided with centering screwed hole on the positioning sleeve, and two centering screwed hole lines are parallel with mounting surface.
Herringbone bear inner hole key slot symmetrical machining method, comprises the following steps：
(1) herringbone bear is lain in a horizontal plane on slotting machine rotary table and fixed, with the endoporus calibration centering centre of gyration,
Herringbone bear end face not chamfering, deburring；
(2) frock assembled is arranged on herringbone bear upper surface, positioning sleeve lower end is enclosed on the center of herringbone bear
In hole, teeth groove locating shaft lower end is arranged in the teeth groove of herringbone bear, and teeth groove locating shaft is close to by adjusting screw regulation
On herringbone bear flank profil face, the gap between frock body and herringbone bear end face is examined with clearance gauge, is fastened after the assay was approved
Adjusting screw and teeth groove locating shaft is fixed by nut；
(3) rotation rotary table corrects centering reference plane, qualified rear locking rotary table with dial gauge；
(4) by the benchmark keyway on frock body to knife, herringbone bear keyway is inserted；
(5) keyway on herringbone bear is checked with keyway feeler gauge by frock body benchmark keyway.
It is qualified that gap, which is not more than 0.02mm, between the clearance gauge inspection frock body and gear face.
The flatness of the rotation rotary table dial gauge correction centering reference plane is qualified within 0.02mm.
The present invention uses such scheme, processes the technical problem existed for existing herringbone bear symmetrical key, devises
Herringbone bear inner hole key slot symmetrical machining frock and processing method, by designing keyway processing tool, effectively utilize herringbone bear
The centre bore of the reference circle transverse profile flank of tooth and herringbone bear is positioned, symmetrical by control keyway in detection side in frock,
Ensure herringbone gear face teeth groove center, the requirement of inner hole key slot center and hole center on the same line, improve keyway and add
The symmetry precision of work, improves crudy；Using the processing method of above-mentioned Fixture Design, the more quick accurate, processing of positioning
Precision is higher, can field test keyway crudy.
Brief description of the drawings：
Fig. 1 is herringbone gear structure schematic diagram；
Fig. 2 is existing herringbone bear keyway processing method structural representation；
Fig. 3 is that processing tool of the present invention installs and uses sectional view；
Fig. 4 is that processing tool of the present invention installs and uses top view；
Fig. 5 is frock body sectional view of the present invention；
Fig. 6 is frock body top view of the present invention；
Fig. 7 is positioning sleeve sectional view of the present invention；
Fig. 8 is positioning sleeve top view of the present invention；
Fig. 9 is teeth groove positioning axis structure schematic diagram of the present invention；
In figure, 1, frock body, 2, positioning hole, 3, teeth groove positioning hole, 4, benchmark keyway, 5, screwed hole, 6, positioning sleeve, 7,
Teeth groove locating shaft, 8, adjusting screw, 9, mounting surface, 10, centering screwed hole, 11, herringbone bear, 12, centre bore, 13, teeth groove,
14th, nut, 15, reference plane, 16, center line.
Embodiment：
For the technical characterstic for illustrating this programme can be understood, below by embodiment, and its accompanying drawing is combined, to this hair
It is bright to be described in detail.
As shown in figures 3-8, herringbone bear inner hole key slot symmetrical machining frock, including frock body 1, frock body 1 is in
The direction two ends of heart line 16 are respectively equipped with positioning hole 2 and teeth groove positioning hole 3, along the work of the left and right sides of 16 direction positioning hole of center line 2
Benchmark keyway 4 is respectively equipped with dress body 1, if being provided with from top to bottom on a side wall of the frock body 1 provided with teeth groove positioning hole 3
Dry screwed hole 5, screwed hole 5 is centrally located on the wall center line of side, and positioning hole 2 is provided with positioning sleeve 6, and teeth groove positioning hole 3 is provided with
Teeth groove locating shaft 7, screwed hole 5 is provided with adjusting screw 8, by designing keyway processing tool, effectively utilizes 11 points of herringbone bear
The centre bore 12 of the degree circle transverse profile flank of tooth and herringbone bear 11 is positioned, symmetrical by control keyway in detection side in frock
Degree, it is ensured that the end-tooth groove center of herringbone bear 11, the requirement of inner hole key slot center and hole center on the same line, improves key
The symmetry precision of groove processing, improves crudy.
The center of teeth groove positioning hole 3 is equal to the reference radius of herringbone bear 11 to the centre distance of positioning hole 2, it is ensured that positioning is accurate
Really.
The lower end external diameter of positioning sleeve 6 is equal to the diameter of 11 centre bore of herringbone bear 12, it is ensured that accurate positioning.
The cross section of positioning sleeve 6 is boss structure, and the position of the corresponding benchmark keyway 4 of positioning sleeve 6 leaves mounting surface 9, is easy to essence
True keyseat.
Central Symmetry is provided with centering screwed hole 10 on positioning sleeve 6, and the line of two centering screwed hole 10 is parallel with mounting surface 9, peace
Dress positioning sleeve 6 ensures that positioning sleeve is accurately arranged on frock body 1.
Herringbone bear inner hole key slot symmetrical machining method, comprises the following steps：
(1) herringbone bear 11 is lain in a horizontal plane on slotting machine rotary table and fixed, in being turned round with endoporus calibration centering
The heart, the end face of herringbone bear 11 not chamfering, deburring；
(2) frock assembled is arranged on the upper surface of herringbone bear 11, the lower end of positioning sleeve 6 is enclosed on herringbone bear 11
In centre bore 12, the lower end of teeth groove locating shaft 7 is arranged in the teeth groove 13 of herringbone bear 11, makes teeth groove by the regulation of adjusting screw 8
Locating shaft 7 is close on the flank profil face of herringbone bear 11, between being examined with clearance gauge between frock body 1 and the end face of herringbone bear 11
Gap, has fastened adjusting screw 8 and has fixed teeth groove locating shaft 7 by nut 14 after the assay was approved；
(3) rotation rotary table corrects centering reference plane 15, qualified rear locking rotary table with dial gauge；
(4) by the benchmark keyway 4 on frock body 1 to knife, the keyway of herringbone bear 11 is inserted；
(5) keyway on herringbone bear 11 is checked with keyway feeler gauge by the benchmark keyway 4 of frock body 1.
It is qualified that gap, which is not more than 0.02mm, between clearance gauge inspection frock body 1 and the end face of herringbone bear 11.
It is qualified that the flatness of rotation rotary table dial gauge correction centering reference plane 15, which is less than or equal to 0.02mm,.
In conjunction with the processing method of the application based on the processing tool of the application, make the processing pair on herringbone bear 11
The keyway positioning of title is more quick accurate, machining accuracy is higher, can field test keyway crudy the advantages of.
Above-mentioned embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or conversion made to embodiment of the present invention are all fallen within protection scope of the present invention.
Part is not described in detail by the present invention, is the known technology of those skilled in the art of the present technique.
Claims (7)
1. herringbone bear inner hole key slot symmetrical machining frock, it is characterised in that：Including frock body, the frock body is along center
Line direction two ends are respectively equipped with positioning hole and teeth groove positioning hole, divide along along the frock body of the centerline direction positioning hole left and right sides
Not She You benchmark keyway, frock body provided with teeth groove positioning hole a side wall on from top to bottom be provided with some screwed holes, screw thread
Hole is centrally located on the wall center line of side, and positioning hole is provided with positioning sleeve, and teeth groove positioning hole is provided with teeth groove locating shaft, screwed hole
Provided with adjusting screw.
2. herringbone bear inner hole key slot symmetrical machining frock according to claim 1, it is characterised in that：The teeth groove positioning
Hole center is equal to herringbone bear reference radius to positioning holes center distance, and positioning sleeve lower end external diameter is equal in herringbone bear
Heart bore dia.
3. herringbone bear inner hole key slot symmetrical machining frock according to claim 1, it is characterised in that：The positioning sleeve is horizontal
Section is boss structure, and mounting surface is left in the position of positioning sleeve correspondence benchmark keyway.
4. herringbone bear inner hole key slot symmetrical machining frock according to claim 1, it is characterised in that：On the positioning sleeve
Central Symmetry is provided with centering screwed hole, and two centering screwed hole lines are parallel with mounting surface.
5. herringbone bear inner hole key slot symmetrical machining method, it is characterised in that：Comprise the following steps：
(1) herringbone bear is lain in a horizontal plane on slotting machine rotary table and fixed, with the endoporus calibration centering centre of gyration, herringbone
Gear face not chamfering, deburring；
(2) frock assembled is arranged on herringbone bear upper surface, positioning sleeve lower end is enclosed in the centre bore of herringbone bear,
Teeth groove locating shaft lower end is arranged in the teeth groove of herringbone bear, teeth groove locating shaft is close to double helical tooth by adjusting screw regulation
In gear teeth profile surface, the gap between frock body and herringbone bear end face is examined with clearance gauge, fastens adjust spiral shell after the assay was approved
Follow closely and teeth groove locating shaft is fixed by nut；
(3) rotation rotary table corrects centering reference plane, qualified rear locking rotary table with dial gauge；
(4) by the benchmark keyway on frock body to knife, herringbone bear keyway is inserted；
(5) keyway on herringbone bear is checked with keyway feeler gauge by frock body benchmark keyway.
6. herringbone bear inner hole key slot symmetrical machining method according to claim 5, it is characterised in that：Filled in step (2)
It is qualified that gap, which is not more than 0.02mm, between chi inspection frock body and gear face.
7. herringbone bear inner hole key slot symmetrical machining method according to claim 5, it is characterised in that：Revolved in step (3)
The flatness for going back to revolving worktable dial gauge correction centering reference plane is qualified within 0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677030.XA CN107234288A (en) | 2017-08-09 | 2017-08-09 | Herringbone bear inner hole key slot symmetrical machining frock and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677030.XA CN107234288A (en) | 2017-08-09 | 2017-08-09 | Herringbone bear inner hole key slot symmetrical machining frock and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107234288A true CN107234288A (en) | 2017-10-10 |
Family
ID=59988723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710677030.XA Pending CN107234288A (en) | 2017-08-09 | 2017-08-09 | Herringbone bear inner hole key slot symmetrical machining frock and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107234288A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108176901A (en) * | 2017-12-27 | 2018-06-19 | 重庆清平机械有限责任公司 | A kind of herringbone bear processing method |
| CN109623295A (en) * | 2018-12-17 | 2019-04-16 | 南京高精船用设备有限公司 | The process of high-precision low noise thin-walled double split flow herringbone bear |
| CN111085743A (en) * | 2020-01-08 | 2020-05-01 | 吴功城 | Machining equipment for key groove of bevel gear pair |
| CN112317833A (en) * | 2020-10-28 | 2021-02-05 | 中冶陕压重工设备有限公司 | Method for machining internal spline in deep hole |
| CN113695686A (en) * | 2021-10-29 | 2021-11-26 | 杭州前进齿轮箱集团股份有限公司 | Processing method of heavy-load herringbone gear ring processed in split splicing mode and correction tool thereof |
| CN114211310A (en) * | 2021-11-23 | 2022-03-22 | 一重集团天津重工有限公司 | Centering machining method for internal spline of synchronous gear of rotary hub flying shear |
| CN117387472A (en) * | 2023-12-11 | 2024-01-12 | 河南卫华重型机械股份有限公司 | Large herringbone tooth assembly detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008029668B3 (en) * | 2008-06-24 | 2009-10-29 | Maschinenfabrik FRÖMAG GmbH & Co. KG | Tool aggregate for keyseating machine, has feed bar comprising multiple saw tooth-like feed wedges that work against multiple saw tooth-like feed edges of knife holder, where knife holder is attached to feed wedge |
| CN102229138A (en) * | 2011-06-13 | 2011-11-02 | 中信重工机械股份有限公司 | Key groove lineation method for making aligned tooth sample plate and used for helical gear with odd teeth |
| CN202639919U (en) * | 2012-06-27 | 2013-01-02 | 南京金鑫传动设备有限公司 | Key groove machining tooling for herringbone gear |
| CN103831467A (en) * | 2012-11-23 | 2014-06-04 | 大连创新齿轮箱制造有限公司 | Gear broaching key positioning fixture |
| CN105058137A (en) * | 2015-08-19 | 2015-11-18 | 重庆神箭汽车传动件有限责任公司 | Single-keyway broaching tool |
-
2017
- 2017-08-09 CN CN201710677030.XA patent/CN107234288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008029668B3 (en) * | 2008-06-24 | 2009-10-29 | Maschinenfabrik FRÖMAG GmbH & Co. KG | Tool aggregate for keyseating machine, has feed bar comprising multiple saw tooth-like feed wedges that work against multiple saw tooth-like feed edges of knife holder, where knife holder is attached to feed wedge |
| CN102229138A (en) * | 2011-06-13 | 2011-11-02 | 中信重工机械股份有限公司 | Key groove lineation method for making aligned tooth sample plate and used for helical gear with odd teeth |
| CN202639919U (en) * | 2012-06-27 | 2013-01-02 | 南京金鑫传动设备有限公司 | Key groove machining tooling for herringbone gear |
| CN103831467A (en) * | 2012-11-23 | 2014-06-04 | 大连创新齿轮箱制造有限公司 | Gear broaching key positioning fixture |
| CN105058137A (en) * | 2015-08-19 | 2015-11-18 | 重庆神箭汽车传动件有限责任公司 | Single-keyway broaching tool |
Non-Patent Citations (1)
| Title |
|---|
| 郑小海等: "齿形与键槽位置精度的加工工艺研究", 《矿山机械》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108176901A (en) * | 2017-12-27 | 2018-06-19 | 重庆清平机械有限责任公司 | A kind of herringbone bear processing method |
| CN109623295A (en) * | 2018-12-17 | 2019-04-16 | 南京高精船用设备有限公司 | The process of high-precision low noise thin-walled double split flow herringbone bear |
| CN109623295B (en) * | 2018-12-17 | 2020-04-24 | 南京高精船用设备有限公司 | Process method of high-precision low-noise thin-wall double-shunting herringbone gear |
| CN111085743A (en) * | 2020-01-08 | 2020-05-01 | 吴功城 | Machining equipment for key groove of bevel gear pair |
| CN111085743B (en) * | 2020-01-08 | 2020-11-06 | 山东金马工业集团机械锻造厂 | Machining equipment for key groove of bevel gear pair |
| CN112317833B (en) * | 2020-10-28 | 2022-07-05 | 中冶陕压重工设备有限公司 | Method for machining internal spline in deep hole |
| CN112317833A (en) * | 2020-10-28 | 2021-02-05 | 中冶陕压重工设备有限公司 | Method for machining internal spline in deep hole |
| CN113695686A (en) * | 2021-10-29 | 2021-11-26 | 杭州前进齿轮箱集团股份有限公司 | Processing method of heavy-load herringbone gear ring processed in split splicing mode and correction tool thereof |
| CN113695686B (en) * | 2021-10-29 | 2022-02-22 | 杭州前进齿轮箱集团股份有限公司 | Processing method of heavy-load herringbone gear ring processed in split splicing mode and correction tool thereof |
| CN114211310A (en) * | 2021-11-23 | 2022-03-22 | 一重集团天津重工有限公司 | Centering machining method for internal spline of synchronous gear of rotary hub flying shear |
| CN114211310B (en) * | 2021-11-23 | 2024-05-07 | 一重集团天津重工有限公司 | Centering processing method for internal spline of rotary hub flying shear synchronous gear |
| CN117387472A (en) * | 2023-12-11 | 2024-01-12 | 河南卫华重型机械股份有限公司 | Large herringbone tooth assembly detection method |
| CN117387472B (en) * | 2023-12-11 | 2024-04-05 | 河南卫华重型机械股份有限公司 | Large herringbone tooth assembly detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107234288A (en) | Herringbone bear inner hole key slot symmetrical machining frock and processing method | |
| CN102528486B (en) | Tooling for processing inner hole key slot of bevel wheel | |
| CN106493399A (en) | A kind of method that horizontal jig boring machine rotates 180 ° of processing precise parts | |
| CN104476123B (en) | Machining method of engine case | |
| CN103894861A (en) | Alignment device and method for machining strict phase-position key groove of gear inner hole | |
| CN104400363A (en) | Machining method for high-precision eccentric spline shaft | |
| CN106312217A (en) | Clamp for electrospark wire-electrode cuttingof workpieces different in thickness at different angles | |
| CN110280845B (en) | Machining method and machining tool for double-fixed-point threads | |
| CN113695686B (en) | Processing method of heavy-load herringbone gear ring processed in split splicing mode and correction tool thereof | |
| CN106312159A (en) | Fan wheel disc arc mortise machining method | |
| CN112935715B (en) | Machining manufacturing method for airplane wheel hub | |
| CN204487210U (en) | Improve the frock of the quick high duplication positioning precision of integral wheel | |
| CN103331495A (en) | Machining method for worm gear tooth part | |
| CN109570638B (en) | Hobbing method for counter-teeth of spiral teeth of intermediate shaft | |
| CN104924042A (en) | Large gear machine tool drum wheel assembled piece machining method | |
| CN202304720U (en) | Roughing detection measuring tool for worm tooth shape of cutter shaft of gear shaper | |
| CN208728843U (en) | Internal spline taper can rise mandrel | |
| CN101633099B (en) | Method for processing sectorial self-locking block of automobile parts | |
| CN103752954B (en) | A kind of straight wide helicoid spiral case making method | |
| CN113714571B (en) | Inner and outer tooth centering control structure of high-speed precision heavy-duty herringbone gear ring and machining method | |
| CN108189903A (en) | A kind of opening internal spline and its manufacturing method | |
| CN107671344A (en) | A kind of processing method of the nonstandard internal spline of blind hole | |
| CN114425683A (en) | Method for machining taper pin hole | |
| CN106312571A (en) | Forming method, welding clamp and welding detecting tool for long shaft and tooth plate welding type transmission assembly | |
| CN107127533B (en) | A kind of manufacturing process of two-piece type parallel graduated cam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171010 |