CN112388075A - Cross positioning and clamping mechanism applied to gear hobbing - Google Patents
Cross positioning and clamping mechanism applied to gear hobbing Download PDFInfo
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- CN112388075A CN112388075A CN201910737502.5A CN201910737502A CN112388075A CN 112388075 A CN112388075 A CN 112388075A CN 201910737502 A CN201910737502 A CN 201910737502A CN 112388075 A CN112388075 A CN 112388075A
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- mandrel
- cylinder body
- cylinder
- piston
- threaded section
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- 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
- B23F23/02—Loading, unloading or chucking arrangements for workpieces
- B23F23/06—Chucking arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
Abstract
The invention provides a cross positioning and clamping mechanism applied to gear hobbing, which comprises a base, wherein the upper end surface of the base is provided with a vertically upward mandrel, the mandrel comprises a threaded section N and a smooth section M which are arranged up and down, the outer part of the smooth section M of the mandrel is coaxially provided with a fixed boss, the outer part of the threaded section N of the mandrel is movably sleeved with a pressing ring and a nut, four hydraulic positioning mechanisms are arranged between the pressing ring and the fixed boss and are arrayed along the circumferential direction of the mandrel, each hydraulic positioning mechanism comprises a mounting plane which is provided with the outer circumferential surface of the mandrel, a cylinder body which is axially arranged along the radial direction of the mandrel and is provided with an opening is fixedly arranged on the mounting plane, a cylinder cover is arranged at the opening of the cylinder body, a piston rod which penetrates through the cylinder cover and extends to the outside is arranged in the cylinder body, a closed inner cavity is formed in the smooth section M of the mandrel, the cylinder body is communicated with the inner cavity, and a hydraulic pump communicated with the inner cavity is installed on the base.
Description
Technical Field
The invention relates to the technical field of gear machining, in particular to a cross-shaped positioning and clamping mechanism applied to gear hobbing.
Background
The gear machining comprises the stages of gear blank machining, tooth profile machining and the like, wherein the gear blank machining specifically comprises the steps of normalizing a forged gear blank, then turning the outer circular surface, the inner circular surface and the end surface of the gear blank, and ensuring that the end surface runout is 1/2-1/3 of the tooth direction error; the tooth profile processing is concretely that a turned tooth blank is clamped and fixed, and tooth profile processing treatment is carried out through hobbing/gear shaping/gear shaving and the like, wherein a common hobbing clamp at present generally adopts a combined mechanism, namely the fixture comprises a clamp base and a mandrel, the clamp base with the same specification can be provided with mandrels with different specifications, the turned tooth blank is sleeved on the mandrel matched with the turned tooth blank in the using process, the lower end surface of the tooth blank is provided with a gasket, and the upper end surface is provided with a pressing ring and a nut for tightly pressing and fixing the tooth blank, the defect of clamping by adopting the clamp is that the coaxiality between the mandrel and the gear blank affects the precision of tooth profile processing, particularly the coaxiality error between a pitch circle and a central hole, and the service life of the gear is greatly affected, therefore, the inventor designs a gear blank with ingenious structure, simple principle and capability of improving the coaxiality between the gear blank and the mandrel, and the cross positioning and clamping mechanism is convenient to operate and is applied to gear hobbing.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the cross-shaped positioning and clamping mechanism which is ingenious in structure, simple in principle, capable of improving the coaxiality between the gear blank and the mandrel and convenient to operate and is applied to gear hobbing.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.
The cross positioning and clamping mechanism comprises a rectangular base, a mandrel vertically and upwards arranged is arranged on the upper end face of the base, the mandrel comprises a smooth section M and a threaded section N, the threaded section N is positioned above the smooth section M, a circular fixing boss is coaxially and fixedly arranged outside the smooth section M of the mandrel and is arranged close to the threaded section N, a circular pressing ring and a nut are movably sleeved outside the threaded section N of the mandrel, the nut is positioned above the pressing ring and in threaded connection and matching with the threaded section N of the mandrel, a hydraulic positioning mechanism is arranged between the pressing ring and the fixing boss, and four hydraulic positioning mechanisms are arranged and are arranged in an array along the circumferential direction of the mandrel;
the hydraulic positioning mechanism comprises a mounting plane which is provided with an outer circular surface of a mandrel, a cylinder body which is axially arranged along the radial direction of the mandrel and is provided with an opening is fixedly mounted on the mounting plane, a cylinder cover which is in sealing connection and matching with the opening of the cylinder body is arranged at the opening of the cylinder body, a piston rod which penetrates through the cylinder cover and extends to the outside is arranged in the cylinder body, the piston rod is composed of a piston and a push rod which are fixedly connected, a sealing type sliding guide matching is formed between the piston and the cylinder body along the radial direction of the mandrel, a sliding guide matching is formed between the push rod and the cylinder cover along the radial direction of the mandrel, the piston is;
the mandrel is characterized in that a closed inner cavity is formed in the mandrel smooth section M, one end, deviating from the cylinder cover, of the cylinder body is communicated with the inner cavity, and a hydraulic pump is fixedly mounted on the base and is communicated with the inner cavity.
As a further optimization or improvement of the present solution.
The movable reset spring that is provided with in the cylinder body, reset spring one end is contradicted with the cylinder cap, and the other end is contradicted with the piston and reset spring's elasticity is by the directional piston of cylinder cap all the time.
As a further optimization or improvement of the present solution.
The upper end face of the fixed boss is provided with a rectangular inner sinking groove, a level bar is arranged in the inner sinking groove, a transparent glass cover plate matched with the inner sinking groove is arranged at the opening of the inner sinking groove, and the upper end face of the glass cover plate is flush with the upper end face of the fixed boss.
Compared with the prior art, the gear blank positioning device has the advantages that the structure is ingenious, the principle is simple, the mandrel does not need to be replaced, gear blanks of different specifications can be used for being sleeved, the inner circular surfaces of the gear blanks are synchronously pushed outwards by adopting a plurality of hydraulic pumps arranged in a cross shape, the coaxial positioning of the gear blanks is realized, then the positioned gear blanks are fixed through the pressing ring and the screw cap, the coaxiality between the gear blanks and the mandrel is improved, and the clamping process of the gear blanks is simplified.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of the working state of the present invention.
FIG. 2 is a schematic structural diagram of the initial state of the present invention.
FIG. 3 is a view of the hydraulic positioning mechanism in cooperation with the mandrel.
Fig. 4 is a schematic diagram of the internal structure of the hydraulic positioning mechanism.
Fig. 5 is a schematic view of the internal structure of the fixing boss.
Fig. 6 is a structural schematic view of the fixing boss.
Labeled as:
10. a base; 11. a mandrel; 12. fixing the boss; 13. pressing a ring; 14. a nut; 15. an inner sinking groove; 16. a level bar; 17. a glass cover plate;
20. a hydraulic positioning mechanism; 21. a mounting plane; 22. a cylinder body; 23. a cylinder cover; 24. a piston rod; 25. pushing the block; 26. a return spring;
30. a hydraulic pump.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, a cross positioning and clamping mechanism applied to gear hobbing processing comprises a rectangular base 10, a spindle 11 arranged vertically and upwardly is arranged on the upper end face of the base 10, the spindle 11 comprises a smooth section M and a threaded section N, the threaded section N is located above the smooth section M, a circular fixing boss 12 is coaxially and fixedly arranged outside the smooth section M of the spindle 11, the fixing boss 12 is arranged close to the threaded section N, a circular pressing ring 13 and a nut 14 are movably sleeved outside the threaded section N of the spindle 11, the nut 14 is located above the pressing ring 13, the nut 14 and the threaded section N of the spindle 11 form threaded connection and matching, a hydraulic positioning mechanism 20 is arranged between the pressing ring 13 and the fixing boss 12, and the hydraulic positioning mechanisms 20 are four and are arranged in an array along the circumferential direction of the spindle 11.
Specifically, the hydraulic positioning mechanism 20 includes a mounting plane 21 provided on the outer circular surface of the mandrel 11, a cylinder body 22 arranged axially along the radial direction of the mandrel 11 and having an opening is fixedly mounted on the mounting plane 21, a cylinder cover 23 matched with the opening of the cylinder body 11 in a sealing manner is provided at the opening of the cylinder body 11, a piston rod 24 extending to the outside through the cylinder cover 23 is provided in the cylinder body 22, the piston rod 24 is composed of a piston and a push rod which are fixedly connected, a sealing type sliding guide fit is formed between the piston and the cylinder body 22 along the radial direction of the mandrel 11, a sliding guide fit is formed between the push rod and the cylinder cover 23 along the radial direction of the mandrel 11, the piston is arranged far away from the cylinder cover 23 in an initial state, an arc-shaped pushing block 25 protruding outwards is fixedly provided at one end of the push rod away.
More specifically, in order to supply hydraulic oil to a plurality of cylinder blocks 22 simultaneously, airtight inner chamber has been seted up in the smooth section M of mandrel 11, and cylinder block 22 deviates from 23 one end of cylinder cap and inner chamber switch-on, fixed mounting has hydraulic pump 30 and inner chamber connection switch-on the base 10, through the oil extraction of hydraulic pump 30 towards the inner chamber, makes piston rod 24 outwards slide, inhales oil through hydraulic pump 30, makes piston rod 24 inwards slide.
In the process of clamping the gear blank, a user detaches the nut 14 and the pressing ring 13, the turned gear blank is sleeved on the mandrel 11, the lower end face of the gear blank is attached to the upper end face of the fixed boss 12, at the moment, the hydraulic pump 30 is started, hydraulic oil is injected into the inner cavity of the hydraulic pump 30, the hydraulic oil enters the cylinder body 22 and pushes the piston rod 24 to slide outwards along with the gradual increase of the pressure in the cylinder body 22, the piston rod 24 drives the pushing blocks 25 to move synchronously and pushes and positions the inner circular face of the gear blank, the pushing blocks 25 move synchronously outwards along the radial direction of the mandrel 11 to enable the gear blank and the mandrel 11 to keep coaxial, then, the nut 14 and the pressing ring 13 are matched with each other to compress and fix the positioned gear blank, and the clamping of the gear blank is completed; after the processing of the tooth profile, the hydraulic pump 30 is started to absorb oil, so that the piston rod 14 drives the pushing block 25 to move reversely and reset, the pushing and positioning of the inner circle surface of the gear blank are released, and finally the blank after the processing of the tooth profile is taken down for further processing.
Referring to fig. 4, as a more optimized scheme of the present invention, the hydraulic pump 30 sucks oil to form negative pressure in the cylinder 22 and reset the piston rod 24, in order to quickly reset the piston rod 24, the cylinder 22 is movably provided with the reset spring 26, one end of the reset spring 26 abuts against the cylinder cover 23, the other end abuts against the piston, and the elastic force of the reset spring 26 always points to the piston from the cylinder cover 23.
Referring to fig. 5 and 6, as a more complete scheme of the present invention, if the mandrel 11 is tilted at a small angle after being used for a long time, the coaxial positioning of the hydraulic positioning mechanism 20 on the gear blank will be directly affected, and therefore, the upper end surface of the fixed boss 12 is provided with the rectangular inner sunken groove 15, the horizontal ruler 16 is arranged in the inner sunken groove 15, the opening of the inner sunken groove 15 is provided with the transparent glass cover plate 17 matched with the inner sunken groove, and the upper end surface of the glass cover plate 17 is flush with the upper end surface of the fixed boss 12.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention; various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. Be applied to cross location clamping mechanism of gear hobbing processing, its characterized in that: the hydraulic positioning device comprises a rectangular base, wherein a mandrel which is vertically and upwards arranged is arranged on the upper end face of the base, the mandrel comprises a smooth section M and a threaded section N, the threaded section N is positioned above the smooth section M, a round fixing boss is coaxially and fixedly arranged outside the smooth section M of the mandrel and is arranged close to the threaded section N, a round pressing ring and a nut are movably sleeved outside the threaded section N of the mandrel, the nut is positioned above the pressing ring and is in threaded connection and matching with the threaded section N of the mandrel, a hydraulic positioning mechanism is arranged between the pressing ring and the fixing boss, and four hydraulic positioning mechanisms are arranged and are arranged in an array mode along the circumferential direction of the mandrel;
the hydraulic positioning mechanism comprises a mounting plane which is provided with an outer circular surface of a mandrel, a cylinder body which is axially arranged along the radial direction of the mandrel and is provided with an opening is fixedly mounted on the mounting plane, a cylinder cover which is in sealing connection and matching with the opening of the cylinder body is arranged at the opening of the cylinder body, a piston rod which penetrates through the cylinder cover and extends to the outside is arranged in the cylinder body, the piston rod is composed of a piston and a push rod which are fixedly connected, a sealing type sliding guide matching is formed between the piston and the cylinder body along the radial direction of the mandrel, a sliding guide matching is formed between the push rod and the cylinder cover along the radial direction of the mandrel, the piston is;
the mandrel is characterized in that a closed inner cavity is formed in the mandrel smooth section M, one end, deviating from the cylinder cover, of the cylinder body is communicated with the inner cavity, and a hydraulic pump is fixedly mounted on the base and is communicated with the inner cavity.
2. The cross positioning and clamping mechanism applied to gear hobbing of the gear according to claim 1, characterized in that: the movable reset spring that is provided with in the cylinder body, reset spring one end is contradicted with the cylinder cap, and the other end is contradicted with the piston and reset spring's elasticity is by the directional piston of cylinder cap all the time.
3. The cross positioning and clamping mechanism applied to gear hobbing of the gear according to claim 1, characterized in that: the upper end face of the fixed boss is provided with a rectangular inner sinking groove, a level bar is arranged in the inner sinking groove, a transparent glass cover plate matched with the inner sinking groove is arranged at the opening of the inner sinking groove, and the upper end face of the glass cover plate is flush with the upper end face of the fixed boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737502.5A CN112388075A (en) | 2019-08-12 | 2019-08-12 | Cross positioning and clamping mechanism applied to gear hobbing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737502.5A CN112388075A (en) | 2019-08-12 | 2019-08-12 | Cross positioning and clamping mechanism applied to gear hobbing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112388075A true CN112388075A (en) | 2021-02-23 |
Family
ID=74602153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910737502.5A Pending CN112388075A (en) | 2019-08-12 | 2019-08-12 | Cross positioning and clamping mechanism applied to gear hobbing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112388075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001078A (en) * | 2023-10-08 | 2023-11-07 | 泰州市宏强机械有限公司 | Gear grinding tool for gear machining |
-
2019
- 2019-08-12 CN CN201910737502.5A patent/CN112388075A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001078A (en) * | 2023-10-08 | 2023-11-07 | 泰州市宏强机械有限公司 | Gear grinding tool for gear machining |
| CN117001078B (en) * | 2023-10-08 | 2023-12-08 | 泰州市宏强机械有限公司 | Gear grinding tool for gear machining |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210223 |
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| WD01 | Invention patent application deemed withdrawn after publication |