CN101898330A - Improved centre frame for precision grinding machine - Google Patents
Improved centre frame for precision grinding machine Download PDFInfo
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- CN101898330A CN101898330A CN2010102286772A CN201010228677A CN101898330A CN 101898330 A CN101898330 A CN 101898330A CN 2010102286772 A CN2010102286772 A CN 2010102286772A CN 201010228677 A CN201010228677 A CN 201010228677A CN 101898330 A CN101898330 A CN 101898330A
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- clamping
- jaw
- connection block
- centre frame
- boards
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Abstract
The invention discloses an improved centre frame for a precision grinding machine. The centre frame comprises an outer clamping box connected with an oil cylinder. Two clamping boards and a clamping jaw connecting base positioned between the two clamping boards are arranged in an inner cavity of the outer clamping box. Symmetrical upper and lower clamping jaws are hinged at front ends of the two clamping boards and correspond to an opening at the front end of the outer clamping box. The rear end of the clamping jaw connecting base is connected with a piston rod of the oil cylinder; the front end of the clamping jaw connecting base is provided with symmetrical upper and lower returning boards; claw arms of the upper and lower clamping jaws are provided with pin shafts to be matched with guiding strip-shaped holes on the upper and lower returning boards; and a middle clamping jaw which is connected with the clamping jaw connecting base is arranged between the upper and lower clamping jaws. The three clamping jaws can clamp along the decreasing diameter of the processing shaft neck, and have constant clamping force and follow-up clamping function. Meanwhile, the three clamping jaws resist to grinding (cutting) force, and make the position of the center of a processed circle invariable in the rotating centers of machine tool headstock and tailstock spindles simultaneously.
Description
Technical field
Patent of the present invention belongs to the precision grinder annex, is specifically related to a kind of improved centre frame that is used for precision grinder.
Background technology
Centre frame on the existing precision grinder has the following disadvantages: 1, jaw is installed in the centre of centre frame, differ in fixing processing excircles size, the different axial workpiece of spacing is the outer bowlder of camshaft trunnion especially, because the trunnion spacing is less, the space that lacks insertion amount instrument gauge head, thereby can't carry out online (processing is carried out simultaneously with detection) and measure; Processing is asynchronous with measurement, is measured as check (can not predict whether workpiece is qualified) afterwards, influences the production efficiency of lathe and the qualification rate of converted products; 2, jaw can not be along with diminishing of axle journal of processing and the diameter that and then diminish clamps, and promptly do not have the servo-actuated track and localization to clamp function; 3, jaw can not carry out the angle direction fine setting when adopting the school rod to install, and the precision of three-jaw centering is low, can't satisfy the requirement of grinding high accuracy (deviation from cylindrical form is below 0.002mm).
Summary of the invention
The objective of the invention is defective, a kind of convenient processing is provided, can improve the improved centre frame that is used for precision grinder of machining accuracy at the prior art existence.
Realize that the technical scheme that the object of the invention adopts is: the improved centre frame that is used for precision grinder comprises the outer folder casket that is connected with oil cylinder, the front end of outer folder casket is provided with opening, and the inner chamber that presss from both sides casket outward is provided with two clamping plate that can seesaw and is positioned at the middle jaw Connection Block of two clamping plate; The upper and lower jaw that the front end of described two clamping plate is hinged with symmetry is corresponding with the opening of outer folder casket front end, is provided with spring between the rear end of two clamping plate and the outer folder casket; The rear end of described jaw Connection Block is connected with the piston rod of oil cylinder, the front end of jaw Connection Block is provided with the upper and lower Returning plate of symmetry, be arranged with the guiding bar hole on the upper and lower Returning plate, the pawl arm of described upper and lower jaw is provided with bearing pin and cooperates with guiding bar hole on the upper and lower Returning plate respectively, is provided with the middle jaw that is connected with the jaw Connection Block in the middle of the upper and lower jaw.
The pawl head of described upper and lower jaw and middle jaw are positioned at a side of outer folder casket.
The equal activity of described upper and lower jaw is contained on their pawl arms separately, and middle jaw activity is contained on the jaw Connection Block, and they all are provided with regulates parts in order to finely tune their middle distance of deciding.
Beneficial effect of the present invention:
1, the present invention is by hydraulically powered three jaws, when grinding, when diameter of work diminishes gradually, jaw is under the driving effect of hydraulic coupling, can be along with diminishing of journal size of processing and the diameter (self adaptation) that and then diminish clamps, and clamping force keeps constant and has clamping function with motion tracking.And resisting mill (cutting) makes processed circle when cutting power center, remain at the invariant position at lathe head, tail frame main axis rotation center.
2, three jaws of the present invention, be offset to a side of outer folder casket, reserved the space that installs and measures the instrument gauge head, the amount instrument can the synchro measure workpiece size, when grinding, can realize closed-loop control, when being ground to (the amount instrument demonstrates) desired size of part, stop processing, guaranteed under the grinding work piece behind the machine uniformity of grinding size.
3, three jaws of the present invention can carry out radially finely tuning with angle direction accurately when adopting the school rod to install, and therefore can satisfy the requirement of grinding high accuracy (deviation from cylindrical form is below 0.002mm).The present invention is a kind of high accuracy car, desirable centre frame of grinding automatic machine tool of being applicable to.
The present invention is described further below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the structural representation of jaw among the present invention.
Specific embodiments
As shown in Figure 1 and Figure 2, the improved centre frame that is used for precision grinder, comprise the outer folder casket 9 that is connected with oil cylinder 14, the front end that presss from both sides casket 9 outward is provided with opening, and the inner chamber that presss from both sides casket 9 outward is provided with two clamping plate 18 that can seesaw and the jaw Connection Block 10 that is positioned at two clamping plate, 18 centres; The front end of two clamping plate 18 is hinged with symmetry with jack-post 4 upper and lower jaw 1,2 is corresponding with the opening of outer folder casket 9 front ends, is provided with spring 12 between the rear end of two clamping plate 18 and the outer folder casket 9; The rear end of described jaw Connection Block 10 is connected with the piston rod 13 of oil cylinder 14, the front end of jaw Connection Block 10 is provided with the upper and lower Returning plate 8,11 of symmetry, be arranged with guiding bar hole 7 on the upper and lower Returning plate 8,11, the pawl arm 5 of described upper and lower jaw 1,2 is provided with roller, the bearing pin 6 of roller cooperates with guiding bar hole 7 on the upper and lower Returning plate 8,11 respectively, jaw 3 in being provided with in the middle of the upper and lower jaw 1,2, middle jaw 3 is connected with jaw Connection Block 10, the guide pad 17 of jaw 3 in being provided with between two clamping plate 18; The side that the pawl head of upper and lower jaw 1,2 is located at their pawl arms 5 is positioned at an outer side of pressing from both sides casket with middle jaw 3; See Fig. 3, upper and lower jaw 1,2 activities are contained on its pawl arm 5, and upper and lower jaw 1,2 is provided with adjustment screw 19,20 and decides middle distance in order to finely tune it; Middle jaw 3 activities are contained on the jaw Connection Block 10, be tightened in its locating slot 16 with dog screw 15 middle jaw 3 is positioned on the jaw Connection Block 10, with adjustment screw 21 with adjust contract piece 22 and cooperate further middle jaw 3 and jaw Connection Block 10 are located, decide middle distance in order to finely tune it.
Operation principle of the present invention:
1) enter pressure oil when oil cylinder 14 rodless cavities, promote piston rod 13 and move to left, spring 12 promotes two clamping plate 18 and moves to left to limiting the position simultaneously, and upper and lower jaw 1,2 stretches out from the opening of outer folder casket 9 front ends; Two clamping plate 18 move to left to qualifying bit postpone, piston rod 13 continues to move to left with jaw Connection Block 10, two symmetrical inclined-planes of symmetry on the upper and lower Returning plate 8,11 of jaw Connection Block 10 guiding bar hole 7 promote roller 6 symmetries on the upper and lower pawl arm 5 synchronously along rising on the inclined-plane, make upper and lower pawl arm 5 simultaneously around separately jack-post 4 rotation, make upper gripper jaw 1 and following jaw 2 synchronous clamping work pieces; When jaw Connection Block 10 promotes roller 6 on the upper and lower pawl arm 5 and rises on the inclined-plane, jaw 3 move to left clamping work pieces, i.e. upper gripper jaw 1, time jaw 2, the synchronous clamping work pieces of middle jaw 3 three-jaws and self-centering during jaw Connection Block 10 promotes simultaneously.
2) the amount instrument position A that can be arranged on upper and lower jaw 1,2 one sides detects workpiece B, and oil cylinder 14 keeps suitable location clamping force, the lathe grinding work piece, and the detection data that the amount instrument does not stop, the data that equivalent instrument detects reach and stop processing after drawing requires.Oil cylinder 14 rod chambers enter pressure oil, promoting piston rod 13 moves to right, jaw Connection Block 10 moves to right and drives upper and lower Returning plate 8,11 and move to right, roller 6 symmetries on the upper and lower pawl arm 5 of upper and lower Returning plate 8,11 pullings descend along the inclined-plane of the guiding bar hole 7 on the upper and lower Returning plate 8,11 synchronously, make upper and lower pawl arm 5 simultaneously around jack-post 4 clockwises separately, anticlockwise rotation, make upper gripper jaw 1 and following jaw 2 unclamp workpiece synchronously; When jaw Connection Block 10 pulling rollers 6 descended, jaw 3 moved to right and unclamps workpiece during jaw Connection Block 10 spurred simultaneously, and promptly upper gripper jaw 1, following jaw 2, middle jaw 3 three-jaws unclamp workpiece synchronously and reach maximum.After three-jaw unclamps maximum synchronously.Two clamping plate, 18 pressuring springs 12 move to right, and jaw Connection Block 10 continues to move to right, and upper and lower pawl arm 5 and upper gripper jaw 1, following jaw 2 are taken in to original position.Unload the workpiece that processes, load onto workpiece to be processed.Carry out next one circulation.
3) during Installation and Debugging, high-ranking officers rod C is installed in head, tail frame and holds out against on top, the upper gripper jaw 1 of centre frame, following jaw 2 are finely tuned their middle distance of deciding respectively by adjustment screw 21, adjustment contract piece 22, dog screw 15 by adjustment screw 19,20, middle jaw 3, i.e. fine setting is near evenly fastening behind the school rod C face of cylinder, and three-jaw just can reach accurate centering degree during with motion tracking.Thereby guaranteed the high accuracy that the workpiece basic circle is beated.
Centre frame of the present invention is used for process, strengthens the rigidity of part to be processed, the constant force square of clamping process, the machine tool accessories of the precision of raising working (machining) efficiency and part processing quality.In car, grinding process, can use one or more centre frames according to the length of workpiece, can be used as the high accuracy follower rest and use, also can be used as the high accuracy back rest and use.
Claims (3)
1. an improved centre frame that is used for precision grinder is characterized in that comprising the outer folder casket that is connected with oil cylinder, and the front end that presss from both sides casket outward is provided with opening, and the inner chamber that presss from both sides casket outward is provided with two clamping plate that can seesaw and is positioned at the middle jaw Connection Block of two clamping plate; The upper and lower jaw that the front end of described two clamping plate is hinged with symmetry is corresponding with the opening of outer folder casket front end, is provided with spring between the rear end of two clamping plate and the outer folder casket; The rear end of described jaw Connection Block is connected with the piston rod of oil cylinder, the front end of jaw Connection Block is provided with the upper and lower Returning plate of symmetry, be arranged with the guiding bar hole on the upper and lower Returning plate, the pawl arm of described upper and lower jaw is provided with bearing pin and cooperates with guiding bar hole on the upper and lower Returning plate respectively, is provided with the middle jaw that is connected with the jaw Connection Block in the middle of the upper and lower jaw.
2. the improved centre frame that is used for precision grinder according to claim 1 is characterized in that the pawl head of described upper and lower jaw and the side that middle jaw is positioned at outer folder casket.
3. the improved centre frame that is used for precision grinder according to claim 1 and 2, it is characterized in that the equal activity of described upper and lower jaw is contained on their pawl arms separately, middle jaw activity is contained on the jaw Connection Block, and they all are provided with regulates parts in order to finely tune their middle distance of deciding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102286772A CN101898330A (en) | 2010-07-16 | 2010-07-16 | Improved centre frame for precision grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102286772A CN101898330A (en) | 2010-07-16 | 2010-07-16 | Improved centre frame for precision grinding machine |
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| Publication Number | Publication Date |
|---|---|
| CN101898330A true CN101898330A (en) | 2010-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102286772A Pending CN101898330A (en) | 2010-07-16 | 2010-07-16 | Improved centre frame for precision grinding machine |
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| Country | Link |
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| CN (1) | CN101898330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825509A (en) * | 2012-08-13 | 2012-12-19 | 宁波沃特美逊机器人科技有限公司 | Assembling device for pneumatic gripper mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159343A (en) * | 1984-12-28 | 1986-07-19 | S M W Japan:Kk | Automatic aligning and gripping device |
| US5285599A (en) * | 1992-02-04 | 1994-02-15 | Arobotech Systems, Inc. | Method for adjusting a steady rest having an internal centerline adjustment |
| JPH0671560A (en) * | 1992-08-26 | 1994-03-15 | S M W Japan:Kk | Automatic centering and center rest device for cylindrical grinding of long work and grinding method therewith |
| CN2229855Y (en) * | 1995-06-30 | 1996-06-26 | 华中理工大学 | Hydraulic self adapting variable diameter follow-rest |
| JPH10118892A (en) * | 1996-10-25 | 1998-05-12 | Okuma Mach Works Ltd | Automatic runout stopping device |
| CN101116954A (en) * | 2007-08-24 | 2008-02-06 | 湖南大学 | Autotracking centring clamping device for numerically controlled grinder |
| CN201082505Y (en) * | 2007-09-27 | 2008-07-09 | 呼和浩特众环(集团)有限责任公司 | Self-centering hydraulic pressure center frame |
| CN201324945Y (en) * | 2008-11-21 | 2009-10-14 | 四川长征机床集团有限公司 | Self-centering center frame |
-
2010
- 2010-07-16 CN CN2010102286772A patent/CN101898330A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159343A (en) * | 1984-12-28 | 1986-07-19 | S M W Japan:Kk | Automatic aligning and gripping device |
| US5285599A (en) * | 1992-02-04 | 1994-02-15 | Arobotech Systems, Inc. | Method for adjusting a steady rest having an internal centerline adjustment |
| JPH0671560A (en) * | 1992-08-26 | 1994-03-15 | S M W Japan:Kk | Automatic centering and center rest device for cylindrical grinding of long work and grinding method therewith |
| CN2229855Y (en) * | 1995-06-30 | 1996-06-26 | 华中理工大学 | Hydraulic self adapting variable diameter follow-rest |
| JPH10118892A (en) * | 1996-10-25 | 1998-05-12 | Okuma Mach Works Ltd | Automatic runout stopping device |
| CN101116954A (en) * | 2007-08-24 | 2008-02-06 | 湖南大学 | Autotracking centring clamping device for numerically controlled grinder |
| CN201082505Y (en) * | 2007-09-27 | 2008-07-09 | 呼和浩特众环(集团)有限责任公司 | Self-centering hydraulic pressure center frame |
| CN201324945Y (en) * | 2008-11-21 | 2009-10-14 | 四川长征机床集团有限公司 | Self-centering center frame |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825509A (en) * | 2012-08-13 | 2012-12-19 | 宁波沃特美逊机器人科技有限公司 | Assembling device for pneumatic gripper mechanism |
| CN102825509B (en) * | 2012-08-13 | 2016-12-21 | 宁波沃特美逊机器人科技有限公司 | A kind of pneumatic gripper mechanism assembling device |
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Open date: 20101201 |