CN203804073U - Workpiece clamping structure of hot spinning machine - Google Patents
Workpiece clamping structure of hot spinning machine Download PDFInfo
- Publication number
- CN203804073U CN203804073U CN201420155430.6U CN201420155430U CN203804073U CN 203804073 U CN203804073 U CN 203804073U CN 201420155430 U CN201420155430 U CN 201420155430U CN 203804073 U CN203804073 U CN 203804073U
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- Prior art keywords
- clamping
- pull bar
- main shaft
- gear
- oil cylinder
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Abstract
The utility model discloses a workpiece clamping structure of a hot spinning machine. The hot spinning machine comprises a spindle, front and back back-up bearings of the spindle, a chuck, a clamping oil cylinder and a tubular pull rod, wherein the chuck is mounted at an output end of the spindle, the clamping oil cylinder is fixed on a machine tool body, the tubular pull rod is located between the clamping oil cylinder and the chuck, sleeved with the spindle and in axially sliding fit with the spindle, the chuck is provided with a T-shaped sliding block and a clamping jaw, the tail end of the pull rod is connected with the clamping oil cylinder, the head end of the pull rod is connected with the T-shaped sliding block, the connecting structure of the pull rod and the clamping oil cylinder is as follows: the tail of the pull rod is sleeved with a push ring, the push ring is fixed on the pull rod by a round nut and a thread bushing at front and back ends of the push ring, a piston of the clamping oil cylinder is fixedly connected with the push ring, a clamping state locking device is also arranged in a position where the pull rod and the clamping oil cylinder are connected, the locking device comprises a locking driving motor and a gear drive pair, a driving wheel of the gear drive pair is a pinion mounted on a motor output shaft, a driven wheel is a gear nut, the outer ring of the gear nut is a gear, and the inner ring of the gear nut is a thread, and the gear nut is connected onto the pull rod through the thread.
Description
Technical field
The utility model relates to thermal spinning press, relates in particular to the workpiece clamping structure of this thermal spinning press, belongs to plant equipment field.
Background technology
Steel cylinder such as oxygen cylinder, nitrogen cylinder etc. are high-pressure bottles, must be overall structures, and its processing technology is, adopt thick walled steel tube, by its port position heating, under molten condition, by spinning matching, form overall cancelled structure,
Thermal spinning press is the machine tool that is specifically designed to processing steel cylinder.In the time of machine-shaping steel cylinder, need to clamp steel cylinder base (steel pipe), so that steel cylinder base feeds motion when rotating with main shaft vertically.Fig. 1 is existing spinning machine clamping structure, and fastening is wedge fastening, and the driving clamping device of use is the rear clamping mode of dual clamping oil cylinder 1, and two clamping cylinders 1 are arranged in the rear end of equipment, are connected with clamp shaft bearing 3.Steel pipe embryo passes from chuck 7 and clamp shaft bearing 3, need to clamp time, two clamping cylinders 1 move to after-contraction, drive clamp shaft bearing 3 to move, holding 2 drive pull bars 4 by the double row tapered roller axis of a cylinder in clamp shaft bearing 3 moves backward, thereby the T-shaped slide block in the chuck 7 of drive front equipment end moves, jaw shrinks the radial clamping power that produces, and clamps steel pipe embryo.Then spindle motor, by belt pulley 5 transmissions, drives whole chuck 7 and the rotation of steel pipe embryo.Spinning finishes rear clamping cylinder 1 to be released forward, and jaw is unclamped, and takes out steel cylinder.
Because two clamping cylinders in whole spinning process must remain contraction state backward, stressed chain is the external force of open type, is not closed internal force, workpiece is after clamping, and when main shaft 6 rotates, bearing is not only wanted bearing radial force, also to bear axial tension, bring thus three negative consequences:
1, energy consumption is high, because shaft strength is large, spindle motor power must increase, and could drive whole main shaft and the rotation of steel pipe embryo.
2, rotating speed is low, because shaft strength is large, and will bear axial force, thus must adopt axis of a cylinder to hold, and the permission rotating ratio ball bearing that axis of a cylinder holds is low, and the speed of mainshaft is restricted.
3, the main shaft bearing life-span is low.
At present, in order to save steel cylinder material, to the winding bottle future development of thin-walled, the spinning process of producing thin-wall bottle needs higher rotating speed, the speed of mainshaft requires to reach per minute 350 and turns, and this structure is limited by clamping mode at present, and speed of mainshaft maximum can reach per minute 220 and turn.Therefore, adopt this kind of clamping structure, cannot meet the needs of thin-wall bottle manufacturing process.
Summary of the invention
The purpose of this utility model is: the drawback existing for above-mentioned prior art, a kind of thermal spinning press clamping structure is provided, and clamping force becomes the internal force between main shaft and pull bar, and main shaft bearing is no longer subject to axial force.
The technical solution adopted in the utility model is such:
The workpiece clamping structure of thermal spinning press, this thermal spinning press has main shaft and front and back block bearing thereof, be contained in the chuck of main shaft output, be fixed on the clamping cylinder on bed piece, tubulose pull bar between clamping cylinder and chuck, this tubulose drag link sleeve is in main shaft, and with main shaft axial sliding fit, described chuck has T shape slide block and claw, the tail end of described pull bar connects clamping cylinder, head end connects T shape slide block, the piston of clamping cylinder is flexible, through pull bar transmission, drive T shape slide block to slide, make claw radial contraction or open, realize clamping or release to workpiece, it is characterized in that, the draw bail of described pull bar and clamping cylinder is: the afterbody cover at pull bar has throw-out collar, there is respectively round nut the front and back of this throw-out collar, thread bush is fixed on throw-out collar on pull bar, the piston of described clamping cylinder is fixedly connected with throw-out collar, piston is flexible, drive pull bar to move forward or backward by throw-out collar, point of attachment at pull bar and clamping cylinder is also provided with clamped condition locking device, this locking device comprises lock drive motor and gear driving pair, the driving wheel of described gear driving pair is pinion, be contained on motor output shaft, driven pulley is gear nut, its outer ring is gear, and inner ring is screw thread, and gear nut is threaded connection on pull bar, after workpiece is clamped, lock drive electric motor starting, through pinion deceleration transmission, gear nut is got into the breech face of main shaft, make pull bar and the main shaft back of the body tight, Workpiece clamping state is kept, then exit clamping cylinder, then just start spindle motor, carry out rotary pressing processing, like this, under the state of flow formed part not yet, clamping work pieces clamping force used is the internal force between main shaft and pull bar, and main shaft bearing is not subject to axial tension.
Further, described clamped condition locking device is furnished with engagement sleeve, this engagement sleeve is made up of lock out motor slide and clutch oil cylinder, after Workpiece clamping state is kept, clutch oil cylinder starts, and drives lock out motor slide to slide, pinion exits and engages with gear nut, in the time of clamping workpiece again, clutch oil cylinder reverse starting, gear driving pair recovers engagement.
Further, described clamped condition locking device is also furnished with automatic controller, and this automatic controller is set preset value according to current value corresponding to the required moment of locking, controls lock drive motor autostop.
The rear bearing of described main shaft bearing is 4 angular contact ball bearings preferably.
The beneficial effect of technique scheme is:
Because clamping work pieces clamping force used is the internal force between main shaft and pull bar, main shaft bearing is not subject to axial force, can adopt 4 angular contact ball bearings, the speed of mainshaft can reach 350 turn/per minute.And power of motor only has 200 kilowatts, from actual service condition, can meet user's requirement completely, shaft strength reduces, and has extended bearing life more than 2 times.The equipment that uses this clamping device not only can spinning thick walled steel tube, also can spinning thin-wall steel tube, expand the processing range of equipment.
Replace former clamping bearing and bearing block with throw-out collar, simplified machine tool structure, reduced manufacturing cost.
Brief description of the drawings
Fig. 1 is existing thermal spinning press clamping structure figure.
Fig. 2 is this thermal spinning press clamping structure figure.
Fig. 3 is the engagement sleeve structure chart in this structure.
Mark in figure: 1 is clamping cylinder, 2 for double row tapered roller axis of a cylinder holds, and 3 is clamp shaft bearing, 4 is pull bar, and 5 is belt pulley, and 6 is main shaft, 7 is chuck, and 8 is thread bush, and 9 is throw-out collar, 10 is round nut, and 11 is gear nut, and 12 is 4 angular contact ball bearings, 13 is cylinder roller bearing, 14 is lock out motor, and 15 is pinion, and 16 is clutch oil cylinder.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
As Fig. 2, shown in Fig. 3: the workpiece clamping structure of this thermal spinning press, this thermal spinning press has main shaft 6 and 4 angular contact ball bearings of block bearing 12(thereof), 13(cylinder roller bearing), be contained in the chuck 7 of main shaft output, be fixed on the clamping cylinder 1 on bed piece, tubulose pull bar 4 between clamping cylinder 1 and chuck 7, this tubulose drag link sleeve is in main shaft 6, and with main shaft 6 axial sliding fits, described chuck 7 has T shape slide block and claw, the tail end of described pull bar 4 connects clamping cylinder 1, head end connects T shape slide block, the piston of clamping cylinder 1 is flexible, through pull bar 4 transmissions, drive T shape slide block to slide, make claw radial contraction or open, realize clamping or release to workpiece, the feature of this structure is:
The draw bail of pull bar 4 and clamping cylinder, afterbody cover at pull bar has throw-out collar 9, the front and back of this throw-out collar 9 have respectively round nut 10, thread bush 8 that throw-out collar is fixed on pull bar 4, the piston of described clamping cylinder 1 is fixedly connected with throw-out collar 9, piston is flexible, drives pull bar 4 to move forward or backward by throw-out collar 9; Also be provided with clamped condition locking device at pull bar 4 and the point of attachment of clamping cylinder 1, this locking device comprises lock drive motor 14 and gear driving pair, the driving wheel of described gear driving pair is pinion 15, be contained on lock out motor output shaft, driven pulley is gear nut 11, its outer ring is gear, and inner ring is screw thread, and gear nut 11 is threaded connection on pull bar 4; After workpiece is clamped, lock drive electric motor starting, through pinion 15 deceleration transmission, gear nut 11 is got into the breech face of main shaft 6, pull bar 4 and main shaft 6 are carried on the back tightly, make workpiece remain on clamped condition, now workpiece, main shaft 6, pull bar 4 have been connected as a single entity, and form a stressed closed loop, then exit clamping cylinder 1, then just start spindle motor, drive main shaft 6 to rotate through belt pulley 5, carry out rotary pressing processing, now, clamping work pieces clamping force used is the internal force between main shaft and pull bar, and main shaft bearing is not subject to axial tension.
Further, described clamped condition locking device is furnished with engagement sleeve, this engagement sleeve is made up of lock out motor slide and clutch oil cylinder 16, after Workpiece clamping state is kept, clutch oil cylinder 16 starts, and drives lock out motor slide to slide, pinion 15 exits and engages with gear nut 11, in the time of clamping workpiece again, clutch oil cylinder 16 reverse startings, gear driving pair recovers engagement.
Further, described clamped condition locking device is also furnished with automatic controller, and this automatic controller is set preset value according to current value corresponding to the required moment of locking, controls lock drive motor autostop.
The rear bearing of described main shaft bearing is 4 angular contact ball bearings 12 preferably, rotating speed from original 220 turning/per minute, bring up to 350 turn/per minute, power of motor is reduced to 200 kilowatts from original 250 kilowatts, shaft strength reduces, and has extended bearing life more than 2 times, has reduced energy consumption simultaneously.
The course of work of this structure:
Steel pipe base is pierced into main shaft 6 from chuck 7, start clamping cylinder 1, its piston is to after-contraction, the about 100mm of retraction stroke, by throw-out collar 9, pull bar 4 transmissions, slides the T shape slide block in chuck 7, drive claw radial contraction, by steel pipe base clamping, two parallel clamping cylinders 1 can produce the tightening force of maximum 75 tons altogether, and the steel cylinder that can meet maximum specification clamps.Restart lock out motor 14, pinion 15 driven gear nuts 11 rotate, and move forward the breech face near main shaft 6, and tight with main shaft 6 back ofs the body, the maximum pretightning force of gear nut 11 is about 5000N, and design pretightning force formula is as follows:
1. calculate the screw-down torque T (N.m) needing
ρ
v=6°35′μ=0.16D
w=840
d
0=742d
2=d-0.6495P=730-0.6495×6=726.103
Gear nut 11 force of periphery F
t(N)
F
t=2000T/d
2=1083N
Gear nut 11 gear compound graduation circular diameter d
2=1000
Pinion torque T
1(N.m) T
1=F
t× d
1/ 2000=138.6N.m
Pinion reference diameter d
1=256
2. calculate lock out motor power
Power of motor P(Kw)
P=T
1×n/9549=1.73Kw
Select P=4Kw119r/min320N.m according to motor sample and actual conditions
Pinion degree rotation speed n=119r/min
3. clamping cylinder 1 maximum pull 37.7x2=75.4 (ton)
In the time that the pre-fastening moment of gear nut 11 reaches corresponding current setting value; lock out motor 14 autostops, clutch oil cylinder starts, and drives lock out motor slide to slide; pinion 15 exits and engages with gear nut 11; now, workpiece, main shaft 6, pull bar 4 have been connected as a single entity, and form a stressed closed loop; clamping work pieces clamping force used is the internal force between main shaft and pull bar; clamp operation and come to an end, then start spindle motor, can carry out rotary pressing processing.
After spinning work completes, the order that claw unclamps workpiece is: start clamping cylinder 1 and strain pull bar 4, pull bar 4 moves backward simultaneously, now retaining mechanism has not had fastening effect, and pull bar 4 and main shaft 6 are no longer connected as a single entity, and suffered power is clamping cylinder 1 externally applied forces, then, clamping cylinder 1 pushes away forward 100mm and arrives front end extreme position, unclamps steel cylinder, completes a working cycles.
Claims (4)
1. the workpiece clamping structure of thermal spinning press, this thermal spinning press has main shaft and front and back block bearing thereof, be contained in the chuck of main shaft output, be fixed on the clamping cylinder on bed piece, tubulose pull bar between clamping cylinder and chuck, this tubulose drag link sleeve is in main shaft, and with main shaft axial sliding fit, described chuck has T shape slide block and claw, the tail end of described pull bar connects clamping cylinder, head end connects T shape slide block, the piston of clamping cylinder is flexible, through pull bar transmission, drive T shape slide block to slide, make claw radial contraction or open, realize clamping or release to workpiece, it is characterized in that, the draw bail of described pull bar and clamping cylinder is: the afterbody cover at pull bar has throw-out collar, there is respectively round nut the front and back of this throw-out collar, thread bush is fixed on throw-out collar on pull bar, the piston of described clamping cylinder is fixedly connected with throw-out collar, piston is flexible, drive pull bar to move forward or backward by throw-out collar, point of attachment at pull bar and clamping cylinder is also provided with clamped condition locking device, this locking device comprises lock drive motor and gear driving pair, the driving wheel of described gear driving pair is pinion, be contained on motor output shaft, driven pulley is gear nut, its outer ring is gear, and inner ring is screw thread, and gear nut is threaded connection on pull bar, after workpiece is clamped, lock drive electric motor starting, through pinion deceleration transmission, gear nut is got into the breech face of main shaft, make pull bar and the main shaft back of the body tight, Workpiece clamping state is kept, exit again clamping cylinder, then just start spindle motor and carry out rotary pressing processing, like this, clamping work pieces clamping force used is the internal force between main shaft and pull bar, and main shaft bearing is not subject to axial tension.
2. the workpiece clamping structure of thermal spinning press as claimed in claim 1, it is characterized in that, described clamped condition locking device is furnished with engagement sleeve, and this engagement sleeve is made up of lock out motor slide and clutch oil cylinder, after Workpiece clamping state is kept, clutch oil cylinder starts, drive lock out motor slide to slide, pinion exits and engages with gear nut, in the time of clamping workpiece again, clutch oil cylinder reverse starting, gear driving pair recovers engagement.
3. the workpiece clamping structure of thermal spinning press as claimed in claim 1, is characterized in that, described clamped condition locking device is also furnished with automatic controller, and this automatic controller is set preset value according to current value corresponding to the required moment of locking, controls lock drive motor autostop.
4. the workpiece clamping structure of thermal spinning press as claimed in claim 1, is characterized in that, the rear bearing of described main shaft bearing is 4 angular contact ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155430.6U CN203804073U (en) | 2014-04-01 | 2014-04-01 | Workpiece clamping structure of hot spinning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155430.6U CN203804073U (en) | 2014-04-01 | 2014-04-01 | Workpiece clamping structure of hot spinning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203804073U true CN203804073U (en) | 2014-09-03 |
Family
ID=51442884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420155430.6U Withdrawn - After Issue CN203804073U (en) | 2014-04-01 | 2014-04-01 | Workpiece clamping structure of hot spinning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203804073U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878262A (en) * | 2014-04-01 | 2014-06-25 | 四川豪特设备有限公司 | Hot spinning machine workpiece clamping structure |
| CN105327977A (en) * | 2015-11-28 | 2016-02-17 | 渝北区千里马模具加工厂 | Car steering yoke machining device |
| CN105750384A (en) * | 2016-05-16 | 2016-07-13 | 安徽德系重工科技有限公司 | Improved inner-pushing type clamping device for numerical control tube bending machine |
-
2014
- 2014-04-01 CN CN201420155430.6U patent/CN203804073U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878262A (en) * | 2014-04-01 | 2014-06-25 | 四川豪特设备有限公司 | Hot spinning machine workpiece clamping structure |
| CN103878262B (en) * | 2014-04-01 | 2015-12-23 | 四川豪特设备有限公司 | Thermal spinning press workpiece clamping structure |
| CN105327977A (en) * | 2015-11-28 | 2016-02-17 | 渝北区千里马模具加工厂 | Car steering yoke machining device |
| CN105327977B (en) * | 2015-11-28 | 2017-06-16 | 渝北区千里马模具加工厂 | Automobile steering bar processing device |
| CN105750384A (en) * | 2016-05-16 | 2016-07-13 | 安徽德系重工科技有限公司 | Improved inner-pushing type clamping device for numerical control tube bending machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |