CN203045817U - Knife rest operation structure of plastic profile thermal cutting device - Google Patents
Knife rest operation structure of plastic profile thermal cutting device Download PDFInfo
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- CN203045817U CN203045817U CN 201320056132 CN201320056132U CN203045817U CN 203045817 U CN203045817 U CN 203045817U CN 201320056132 CN201320056132 CN 201320056132 CN 201320056132 U CN201320056132 U CN 201320056132U CN 203045817 U CN203045817 U CN 203045817U
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- knife rest
- motor
- frame
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- drawing rod
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Abstract
The utility model relates to a knife rest operation structure of a plastic profile thermal cutting device. The knife rest operation structure of the plastic profile thermal cutting device comprises a frame, a knife rest and a drive device of the knife rest. A left straight line guide rail and a right straight line guide rail are perpendicularly fixed on the frame. The knife rest is provided with a sliding block which is matched with the left straight line guide rail and the right straight line guide rail. A left drawing rod and a right drawing rod are perpendicularly fixed at two ends of the bottom of the knife rest. The frame is provided with a perpendicular guide device matched with the left drawing rod and the right drawing rod. The drive device of the knife rest comprises a motor, a crank link mechanism and a lifting base, wherein the lifting base is fixed at the bottom of the left drawing rod and at the bottom of the left drawing rod, the motor is fixed on the frame, one end of a crank of the crank link mechanism is fixedly connected with an output shaft of the motor, and the other end of the connecting rod is hinged on the lifting base through a support. The knife rest operation structure of the plastic profile thermal cutting device can prolong service life of the motor, improve cutting efficiency and cutting precision, and prevent a blade from breaking, and is small in noise and very convenient to install and adjust.
Description
Technical field
The utility model relates to a kind of plastic material device for thermally cutting, specifically a kind of knife rest operating structure of plastic material device for thermally cutting.
Background technology
At present, in the plastic material device for thermally cutting, generally adopt ball-screw and swivel nut to cooperate to drive knife rest and do the perpendicular cuts motion.There is following shortcoming in this knife rest motion structure: the one, and rate request is very fast when section bar cuts, and the noise that the leading screw quick rotation is sent is big; The 2nd, leading screw is too high to environment requirement, and maintenance is inconvenience extremely; The 3rd, leading screw is made rotating drive knife rest and is moved reciprocatingly, and the necessary rotating of motor is too big to motor influence in service life, damages easily; The 4th, the precision that knife rest moves is up and down guaranteed by the guide pillar guide pin bushing that fully the cutting time error is bigger, causes blade breakages easily.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, and a kind of knife rest operating structure of plastic material device for thermally cutting is provided, and can improve cutting accuracy, prolongs motor service life, reduces noise, and is convenient to maintenance.
The technical solution adopted in the utility model is: comprise frame, knife rest and drive unit thereof; Earnestly blade is fixed on the knife rest; Vertically disposed left and right line slideway is fixedly arranged on the frame, and knife rest is provided with the slide block that cooperates with left and right line slideway; Fixedly there is vertically disposed left and right pull bar at two ends, knife rest bottom, and frame is provided with the vertically-guided device that cooperates with left and right pull bar; Described knife rack driving mechanism comprises motor, toggle and lifting pedestal, lifting pedestal is fixed on left and right pull bar bottom, motor is fixed on the frame, and crank one end and the motor output shaft of toggle are connected, and the connecting rod other end is hinged on lifting pedestal by bearing.
Further, described connecting rod is the adjustable connecting rod of adjustable length.
Further, described vertically-guided device is linear bearing.
As shown from the above technical solution, the utlity model has following beneficial effect: the one, adopt toggle, realize that motor moves continuously, avoided motor the infringement to motor itself that brings of rotating off and on, not only can prolong motor service life, and motor a direction continuously operation be conducive to improve the knife rest speed of service, can improve cutting efficiency.The 2nd, to adopt line slideway and linear bearing two cover mechanisms that knife rest is moved and carry out vertically-guided and location, the location is accurate, and knife rest is stable, not only can improve cutting accuracy, can also prevent blade breakages.The 3rd, toggle is easy to maintenance, and it is little to turn round noise continuously, adopts adjustable connecting rod, install regulate all very convenient.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is along the profile of P-P line among Fig. 1.
Fig. 3 is the knife rest speed change curves figure in a cutting cycle.
The specific embodiment
As depicted in figs. 1 and 2, frame 1 is for being fixed on a vertically disposed substrate on the device for thermally cutting main stand, vertically disposed left and right line slideway 11,12 is fixedly arranged on the frame 1, be respectively equipped with on the knife rest 2 and left and right line slideway 11,12 slide blocks that cooperate 27; Fixedly there is vertically disposed left and right pull bar 25,26 at two ends, knife rest 2 bottom by briquetting 23,24 respectively, and frame 1 is provided with the vertically-guided device 13,14 that cooperates with left and right pull bar 25,26, and vertically-guided device 13,14 is linear bearing.Earnestly blade 3 two ends are fixed on the knife rest 2 by pressing plate 21,22 respectively, and earnestly blade 3 two sides and knife rest 2 and pressing plate 21,22 contacts site are provided with thermal insulation layer 31.
Knife rack driving mechanism comprises motor 4, toggle and lifting pedestal 7, lifting pedestal 7 is fixed on left and right pull bar 25,26 bottoms, motor 4 is fixed on the frame 1, crank 6 one ends and the motor output shaft 41 of toggle are connected, connecting rod 5 other ends are hinged on the bearing 71 that is being fixed in the middle of lifting pedestal 7 upper ends, and the hinge point of the axle center of motor output shaft 41 and connecting rod 5 and bearing 71 is arranged on left and right pull bar 25,26 the symmetrical center line.Connecting rod 5 is the adjustable connecting rod of adjustable length.
It is to be noted, two line slideways are placed in the symmetrical centre of two linear bearings on the different vertical guides, form multiple spot guiding and navigation system, cooperatively interact and to remedy and to reduce because deficiency and the error that machining accuracy and assembly precision bring inadequately, cutting accuracy can be improved, and blade breakages can be effectively prevented.
Also it is pointed out that and utilize toggle can obtain unexpected effect as the knife rest driving mechanism.The average rate rotation of motor is non-uniform velocity by the rectilinear motion up and down that toggle changes into knife rest, and its rate curve is sinusoidal waveform to be changed, and as shown in Figure 4, transverse axis α represents the motor anglec of rotation, and longitudinal axis V acts on behalf of the corresponding speed of service of knife rest.When knife rest is that the top dead center of toggle moves downwards by peak, speed V starts from scratch and increases gradually, when motor rotation 1/4th circles are π/4, speed V arrives maximum, reduce gradually again until being zero to be that motor rotates to the pi/2 place, this moment, knife rest touched the bottom, i.e. the bottom dead centre place of toggle; Velocity variations was identical when descending when knife rest returned.Select the knife rest downstream rate to reach afterwards certain of maximum is a bit cut section bar as blade as the point of the A among Fig. 4 opportunity, be favourable for cutting process, degree of depth increase along with blade incision section bar, the suffered resistance of blade also increases gradually, this moment, knife rest speed V reduced gradually, was conducive to increase the cutting force of blade, eliminated the influence that resistance increases blade, make cutting process more steady, also can prevent blade breakages better simultaneously.
Claims (3)
1. the knife rest operating structure of plastic material device for thermally cutting comprises frame (1), knife rest (2) and drive unit thereof; Earnestly blade (3) is fixed on the knife rest (2); It is characterized in that: frame (1) goes up fixedly vertically disposed left and right line slideway (11,12), and knife rest (2) is provided with the slide block (27) that cooperates with left and right line slideway; Fixedly there is vertically disposed left and right pull bar (25,26) at two ends, knife rest (2) bottom, and frame (1) is provided with the vertically-guided device (13,14) that cooperates with left and right pull bar; Described knife rack driving mechanism comprises motor (4), toggle and lifting pedestal (7), lifting pedestal (7) is fixed on left and right pull bar (25,26) bottom, motor (4) is fixed on the frame (1), crank (6) one ends and the motor output shaft (41) of toggle are connected, and connecting rod (5) other end is hinged on lifting pedestal (7) by bearing (71).
2. the knife rest operating structure of plastic material device for thermally cutting according to claim 1, it is characterized in that: described connecting rod (5) is the adjustable connecting rod of adjustable length.
3. the knife rest operating structure of plastic material device for thermally cutting according to claim 2, it is characterized in that: described vertically-guided device (13,14) is linear bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056132 CN203045817U (en) | 2013-01-31 | 2013-01-31 | Knife rest operation structure of plastic profile thermal cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056132 CN203045817U (en) | 2013-01-31 | 2013-01-31 | Knife rest operation structure of plastic profile thermal cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203045817U true CN203045817U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320056132 Expired - Fee Related CN203045817U (en) | 2013-01-31 | 2013-01-31 | Knife rest operation structure of plastic profile thermal cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203045817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729522A (en) * | 2014-12-12 | 2016-07-06 | 上海金湖挤出设备有限公司 | Mechanical proximate matter high-speed chip-free cutting device |
| CN106364724A (en) * | 2016-10-13 | 2017-02-01 | 桂林航天工业学院 | Condom queuing and moving device based on slider-crank mechanism |
| CN106541450A (en) * | 2016-12-07 | 2017-03-29 | 芜湖海螺挤出装备有限公司 | A kind of plastic irregular profile mould dustless cutting device |
-
2013
- 2013-01-31 CN CN 201320056132 patent/CN203045817U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729522A (en) * | 2014-12-12 | 2016-07-06 | 上海金湖挤出设备有限公司 | Mechanical proximate matter high-speed chip-free cutting device |
| CN106364724A (en) * | 2016-10-13 | 2017-02-01 | 桂林航天工业学院 | Condom queuing and moving device based on slider-crank mechanism |
| CN106364724B (en) * | 2016-10-13 | 2020-05-15 | 桂林航天工业学院 | Condom queuing and moving device based on slider-crank mechanism |
| CN106541450A (en) * | 2016-12-07 | 2017-03-29 | 芜湖海螺挤出装备有限公司 | A kind of plastic irregular profile mould dustless cutting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20160131 |
|
| EXPY | Termination of patent right or utility model |