CN110757335A - Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part - Google Patents
Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part Download PDFInfo
- Publication number
- CN110757335A CN110757335A CN201911230940.9A CN201911230940A CN110757335A CN 110757335 A CN110757335 A CN 110757335A CN 201911230940 A CN201911230940 A CN 201911230940A CN 110757335 A CN110757335 A CN 110757335A
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- China
- Prior art keywords
- shaft
- central
- planet
- cam
- central shaft
- 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
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- 238000003754 machining Methods 0.000 title claims abstract description 9
- 210000002105 tongue Anatomy 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
Abstract
A variable-diameter mandrel for improving the precision of the external circle finish machining of a disc gear and a part comprises an upper end cover and an upper positioning cover which are combined through a connecting piece and are provided with a central through hole, a central shaft provided with a sun gear, three planet shafts respectively provided with cam planet gears in an interference fit mode, and a retainer connected between the upper positioning cover and the lower positioning shaft; a central counter bore for arranging a central shaft and three planet shaft mounting counter bores arranged around the central counter bore are processed on the upper plane of the lower positioning shaft; the upper positioning cover is provided with a central shaft hole and three planet shaft mounting holes arranged around the central shaft hole; the lower end of the central shaft is inserted in a central counter bore of the lower positioning shaft, and the upper end of the central shaft passes through a central shaft hole of the upper positioning cover and is fixed by a locking nut; the lower ends of the three planetary shafts are respectively inserted in corresponding planetary shaft mounting counterbores processed on the lower positioning shaft in a movable fit mode, and the upper ends of the three planetary shafts are respectively penetrated in corresponding planetary shaft mounting holes processed on the upper positioning cover in a movable fit mode.
Description
Technical Field
The invention relates to a variable-diameter mandrel for improving the precision of outer circle finish machining of a disc gear or a part.
Background
In the machining process, some parts can be machined on a machine tool without tools, and some parts can be machined only by means of some tools. Particularly, when the outer circle of some disc gears or disc parts is machined, the inner holes of the disc parts need to be positioned by the mandrel, and then the outer circle is machined after the mandrel is fixed by a clamp on a machine tool. The common mandrel in the prior art is called as an expanding mandrel and is divided into two types, namely a mechanical type mandrel and an air pressure type mandrel. The sliding sleeve is characterized in that the tile type is pushed by a tile on a nut and other members to enable the tile to move inwards and outwards along the radial direction of a mandrel to change the diameter so as to realize expansion and contraction, the sliding sleeve is combined with a peripheral tubular object through a braking tongue block on the sliding sleeve, the tongue block is ejected out through a spring, a tooth sheet or a steel ball is arranged on the periphery of the sliding sleeve, the tooth sheet is used for pushing the outer pipe to transfer the torque, the steel ball is used for pushing the outer pipe to transfer the torque through a gradually changed space, the tooth sheet type steel ball type device is not an expansion shaft, the two types of devices have one-way transmission performance, and the sliding sleeve is in a sliding state when the anti-response pressure is very small. The air pressure type expansion shaft is characterized in that an air bag is arranged in a hollow steel pipe, metal tongues are equally arranged on the periphery of the air bag, and the tongues are in contact with the outside through a reserved waist-shaped window of the steel pipe. The tongue piece stretches out or retracts with the inflation of the air bag, the tongue piece is tensioned with the outer pipe when stretching out, and the tongue piece is loosened with the outer pipe when retracting, so the tongue piece is called as an inflatable shaft. The expansion shaft is used for unreeling and reeling the coil stock, and can realize quick expansion.
However, the diameter-variable range of the mandrels is narrow, the diameter of the variable diameter is relatively fixed, the diameter of the mandrel cannot be randomly changed according to actual conditions, and the mandrels are not universal.
Disclosure of Invention
The invention aims to provide a universal tool-a variable-diameter mandrel which can greatly improve the gear grinding efficiency and precision aiming at the defects in the prior art. The invention is used as a tool for a disc gear or a part through the change of the shaft diameter of the mandrel, is beneficial to processing and improves the precision of the disc gear or the part.
The object of the invention can be achieved by the following technical measures:
the invention relates to a variable-diameter mandrel for improving the precision of the external circle finish machining of a disc gear and parts, which comprises an upper end cover and an upper positioning cover which are combined through a connecting piece and are provided with a central through hole, a central shaft provided with a sun wheel, three planet shafts respectively provided with cam planet wheels in an interference fit mode, and a retainer connected between the upper positioning cover and the lower positioning shaft; a central counter bore for arranging a central shaft and three planet shaft mounting counter bores arranged around the central counter bore are processed on the upper plane of the lower positioning shaft; the upper positioning cover is provided with a central shaft hole and three planet shaft mounting holes arranged around the central shaft hole; the lower end of the central shaft is inserted into a central counter bore of the lower positioning shaft, and the upper end of the central shaft passes through a central shaft hole of the upper positioning cover and is fixed by a locking nut; the lower ends of the three planetary shafts are respectively inserted into corresponding planetary shaft mounting counterbores processed on the lower positioning shaft in a movable fit manner, and the upper ends of the three planetary shafts are respectively penetrated into corresponding planetary shaft mounting holes processed on the upper positioning cover in a movable fit manner; the cam planet wheel is an integrated structure consisting of an upper cam, a lower cam and a planet wheel positioned between the upper cam and the lower cam.
The bottom surface of the lower positioning shaft is provided with a central hole for fixing a tool of a machine tool according to the national standard.
The design principle of the invention is that a planetary gear box transmission principle is utilized, three planetary gears which move around the planetary gear box are driven by a central sun gear, so that the rotation of an upper planetary gear and a lower planetary gear which are in an integrated structure with each planetary gear is realized, and because the cam is in an elliptical shape, the rotation of the cam can form different circles. Backlash of the sun and planet gears is eliminated with a fine machining.
The invention has the following beneficial effects:
the invention utilizes the transmission principle of the planetary gear box to form different diameters of the cams in different track states. Therefore, the change of the shaft diameter of the mandrel is used as a tool of a disc gear or a part, the processing is facilitated, and the precision is improved. Because the central through hole processed on the upper end cover and the B-shaped central hole processed at the lower end of the lower positioning shaft are fixed and unchangeable according to the national standard requirements, the invention does not change the characteristics of the machine tool, and the disc gears with different diameters can be conveniently fixed and aligned on the machine tool by using the tool. Therefore, the tool greatly simplifies the problem of fixing and aligning the disc gear without diameter on the machine tool. The processing efficiency and the processing precision are improved.
Drawings
Fig. 1 is an assembly schematic of the present invention.
Fig. 2 is a schematic diagram of the principle of the present invention.
Fig. 3 is a sectional view of the upper positioning cap.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a sectional view of the cage.
Fig. 6 is a top view of fig. 5.
Number in the figure: the locking device comprises a locking round nut 1, a planet shaft 2, a cam planet wheel 3, an upper end cover 4, an upper positioning cover 5, a central shaft 6, a retainer 7, a sun wheel 8, a lower positioning shaft 9 and a circle formed by the motion trail of the planet wheel 10.
Detailed Description
The invention will be further described with reference to the following examples (drawings):
as shown in fig. 1, the variable diameter mandrel for improving the precision of the outer circle finish machining of the disc gear and the part comprises an upper end cover 4 and an upper positioning cover 5 which are combined through a connecting piece and are provided with a central through hole, a central shaft 6 provided with a sun gear 8, three planet shafts 2 respectively provided with cam planet gears 3 in an interference fit manner, and a retainer 7 (see fig. 5 and 6) connected between the upper positioning cover 5 and a lower positioning shaft 9; a central counter bore for arranging a central shaft and three planet shaft mounting counter bores arranged around the central counter bore are processed on the upper plane of the lower positioning shaft 9; the upper positioning cover 5 is provided with a central shaft hole and three planet shaft mounting holes arranged around the central shaft hole (see figures 3 and 4); the lower end of the central shaft 6 is inserted in a central counter bore of the lower positioning shaft 9, and the upper end of the central shaft passes through a central shaft hole of the upper positioning cover 5 and is fixed by a locking nut; the lower ends of the three planetary shafts 2 are respectively inserted into corresponding planetary shaft mounting counterbores processed on the lower positioning shaft 9 in a movable fit manner, and the upper ends of the three planetary shafts are respectively inserted into corresponding planetary shaft mounting bores processed on the upper positioning cover 5 in a movable fit manner; the cam planet wheel 3 is an integrated structure consisting of an upper cam, a lower cam and a planet wheel positioned between the upper cam and the lower cam.
The bottom surface of the lower positioning shaft 9 is provided with a central hole for fixing a tool of a machine tool according to the national standard.
As shown in fig. 2, after the sun gear 8 drives the cam planet gear 3 to rotate, the cam planet gear 3 forms a circle 10 formed by the motion trail of the planet gear. Since the cam planet wheel 3 is an integrated structure consisting of an upper cam, a lower cam and a planet wheel located between the upper cam and the lower cam, outer circles of different diameters are formed when the cam planet wheel 3 rotates. When the device is used, the device is placed in an inner hole of the disc-shaped inner gear ring, the cam planet wheel 3 is rotated until the three cams tightly push against the inner hole of the gear ring, and gear grinding can be performed after alignment.
As shown in fig. 3 and 4, the upper positioning cap 5 is held together with the holder 7 by means of 10 holes machined around the edge of the upper positioning cap and a corresponding number of bolts.
As shown in fig. 5 and 6, 10 threaded holes are processed on the upper surface and the lower surface of the retainer 7. The upper part is combined with the upper positioning cover 5 through a bolt, and the lower part is combined with the lower positioning shaft 9 through a bolt.
Claims (2)
1. The utility model provides a but, reducing dabber for improving disc gear and part excircle finish machining precision which characterized in that: the device comprises an upper end cover (4) and an upper positioning cover (5) which are combined through a connecting piece and provided with a central through hole, a central shaft (6) provided with a sun wheel (8), three planet shafts (2) respectively provided with cam planet wheels (3) in an interference fit mode, and a retainer (7) connected between the upper positioning cover (5) and a lower positioning shaft (9); a central counter bore for arranging a central shaft and three planet shaft mounting counter bores arranged around the central counter bore are processed on the upper plane of the lower positioning shaft (9); the upper positioning cover (5) is provided with a central shaft hole and three planet shaft mounting holes arranged around the central shaft hole; the lower end of the central shaft (6) is inserted into a central counter bore of the lower positioning shaft (9), and the upper end of the central shaft passes through a central shaft hole of the upper positioning cover (5) and is fixed by a locking nut; the lower ends of the three planetary shafts (2) are respectively inserted into corresponding planetary shaft mounting counterbores processed on the lower positioning shaft (9) in a movable fit manner, and the upper ends of the three planetary shafts are respectively inserted into corresponding planetary shaft mounting bores processed on the upper positioning cover (5) in a movable fit manner; the cam planet wheel (3) is an integrated structure consisting of an upper cam, a lower cam and a planet wheel positioned between the upper cam and the lower cam.
2. The variable diameter mandrel for improving the precision of the outer circle finishing of disc gears and parts according to claim 1, characterized in that: and a central hole for fixing the tool of the machine tool according to the national standard is machined in the bottom surface of the lower positioning shaft (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230940.9A CN110757335A (en) | 2019-12-05 | 2019-12-05 | Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230940.9A CN110757335A (en) | 2019-12-05 | 2019-12-05 | Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110757335A true CN110757335A (en) | 2020-02-07 |
Family
ID=69340959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911230940.9A Pending CN110757335A (en) | 2019-12-05 | 2019-12-05 | Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110757335A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111420838A (en) * | 2020-03-25 | 2020-07-17 | 杭州塑料工业有限公司 | PVDC coating film making machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753323A (en) * | 2014-02-23 | 2014-04-30 | 张鸿来 | Automatic self-centering clamp |
| CN105728770A (en) * | 2016-03-30 | 2016-07-06 | 句容五星机械制造有限公司 | Clamp tool used for turning thin-wall cylindrical workpiece |
| CN106041152A (en) * | 2016-06-25 | 2016-10-26 | 安徽工程大学机电学院 | Grinding and stripping clamp for waste auto rubber tyre |
| CN206083895U (en) * | 2016-10-27 | 2017-04-12 | 温州东田制版有限公司 | Automatic expansion card coils device |
| JP2017094429A (en) * | 2015-11-20 | 2017-06-01 | 株式会社スギノマシン | Workpiece gripping device |
| CN108472744A (en) * | 2015-12-09 | 2018-08-31 | 罗姆股份有限公司 | Clamping device |
| CN210938779U (en) * | 2019-12-05 | 2020-07-07 | 郑州机械研究所有限公司 | Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part |
-
2019
- 2019-12-05 CN CN201911230940.9A patent/CN110757335A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753323A (en) * | 2014-02-23 | 2014-04-30 | 张鸿来 | Automatic self-centering clamp |
| JP2017094429A (en) * | 2015-11-20 | 2017-06-01 | 株式会社スギノマシン | Workpiece gripping device |
| CN108472744A (en) * | 2015-12-09 | 2018-08-31 | 罗姆股份有限公司 | Clamping device |
| CN105728770A (en) * | 2016-03-30 | 2016-07-06 | 句容五星机械制造有限公司 | Clamp tool used for turning thin-wall cylindrical workpiece |
| CN106041152A (en) * | 2016-06-25 | 2016-10-26 | 安徽工程大学机电学院 | Grinding and stripping clamp for waste auto rubber tyre |
| CN206083895U (en) * | 2016-10-27 | 2017-04-12 | 温州东田制版有限公司 | Automatic expansion card coils device |
| CN210938779U (en) * | 2019-12-05 | 2020-07-07 | 郑州机械研究所有限公司 | Diameter-variable mandrel for improving precision of external circle finish machining of disc gear and part |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111420838A (en) * | 2020-03-25 | 2020-07-17 | 杭州塑料工业有限公司 | PVDC coating film making machine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231123 Address after: 450000 No. 149, science Avenue, high tech Zone, Zhengzhou City, Henan Province Applicant after: Zheng Ji Suo (Zhengzhou) Transmission Technology Co.,Ltd. Address before: No. 149, Kexue Avenue, high tech Development Zone, Zhengzhou, Henan Province, 450001 Applicant before: ZHENGZHOU RESEARCH INSTITUTE OF MECHANICAL ENGINEERING Co.,Ltd. |