CN111730135A - Constant force feeding band sawing machine - Google Patents
Constant force feeding band sawing machine Download PDFInfo
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- CN111730135A CN111730135A CN202010561485.7A CN202010561485A CN111730135A CN 111730135 A CN111730135 A CN 111730135A CN 202010561485 A CN202010561485 A CN 202010561485A CN 111730135 A CN111730135 A CN 111730135A
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- connecting shaft
- lead screw
- cutting
- gear
- shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
- B23D55/08—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for guiding or feeding strap saw blades
- B23D55/088—Devices for feeding strap saw blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
- B23D55/06—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of drives for strap saw blades; of wheel mountings
Abstract
The invention relates to a constant-force feeding band sawing machine, which relates to the technical field of metal piece blanking equipment and comprises a main support and a cutting support, wherein the cutting support is provided with a cutting mechanism, the main support is provided with a feeding device for driving the cutting support to slide, the feeding device comprises a first lead screw and a torsion limiting mechanism, one end of the first lead screw is fixedly connected to the main support, the torsion limiting mechanism comprises a first connecting shaft, a second connecting shaft and a clamping assembly, the first connecting shaft is in threaded connection with the first lead screw, the second connecting shaft is sleeved on the outer peripheral surface of the first lead screw, the second connecting shaft is in rotary connection with the first lead screw, the second connecting shaft is in transmission connection with a driving motor, and the first connecting shaft is connected with the second connecting shaft through the clamping assembly. The saw belt cutting device can enable the saw belt to cut materials with constant force, further enables the saw belt to cut at the optimal cutting speed, improves the cutting efficiency, prolongs the service life of the saw belt, meanwhile, enables the saw belt not to shift easily during cutting, and improves the cutting quality.
Description
Technical Field
The invention relates to the technical field of metal piece blanking equipment, in particular to a constant-force feeding band sawing machine.
Background
The horizontal metal band sawing machine has the advantages of low manufacturing cost, simple operation, high cutting precision, easy maintenance and the like, and is widely applied to the machining industry of various metals or nonmetals, while the horizontal metal band sawing machine can be used for blanking and preliminary machining of the end face of a free forging piece, so the horizontal metal band sawing machine is widely applied to the machining industry of gear rings.
Referring to fig. 1 and 2, most of the existing sawing machines include a main support 11 and a cutting support 12, wherein a clamping mechanism 13 for clamping raw materials is arranged on the main support 11; the main support 11 is connected by pneumatic cylinder 14 with cutting between the support 12 mostly, pneumatic cylinder 14 all is provided with two mostly, two pneumatic cylinders 14 set up the both ends at cutting support 12 length direction respectively, pneumatic cylinder 14's cylinder body passes through the bolt fastening on main support 11, pneumatic cylinder 14's piston rod passes through bolt fixed connection on cutting support 12, it is connected with initiative carousel 15 and driven turntable 16 to rotate on cutting support 12, the cover is equipped with round saw area 17 on the outer peripheral face of initiative carousel 15 and driven turntable 16, initiative carousel 15 is driven through driving motor 18.
When cutting the raw material, firstly adjusting the extension length of the piston rod of the hydraulic cylinder 14 to enable the saw belt 17 to be abutted against the peripheral surface of the raw material, then starting the driving motor 18, driving the driving turntable 15 to rotate by the driving motor 18, further driving the saw belt 17 to continuously cut the raw material, and when cutting the raw material, driving the cutting support 12 to slide downwards by the hydraulic cylinder 14 to complete the feeding of the saw belt 17. The hydraulic cylinder 14 is supplied with oil by an oil pump during expansion and contraction, and the flow rate of hydraulic oil flowing into the hydraulic cylinder 14 is adjusted by a throttle valve, so that the piston rod of the hydraulic cylinder 14 is fed at a constant speed.
The above prior art solutions have the following drawbacks: when cutting the material that the cross-section is the ring shape, the cutting resistance at both ends will be greater than the cutting resistance at center, and use the pneumatic cylinder drive saw area to carry out at the uniform velocity and feed, when the initial cut with cut the end, the rotational speed undersize of saw area, and the cutting feed volume is too big, the saw area just breaks easily or takes place the skew this moment, not only reduced production efficiency, but also reduced the cutting quality, when cutting the intermediate position, the rotational speed of saw area is too big, and the cutting feed volume undersize, can cause excessive wearing and tearing to the saw area this moment, the life-span of saw area has been shortened.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a constant-force feeding band sawing machine, which can feed a saw band at constant pressure, so that the feeding speed is reduced when the saw band is subjected to larger resistance, the feeding speed is increased when the saw band is subjected to smaller resistance, the service life of the saw band is prolonged, and the cutting quality is improved.
The above object of the present invention is achieved by the following technical solutions:
a constant-force feeding band sawing machine comprises a main support and a cutting support, wherein a cutting mechanism is arranged on the cutting support, the cutting mechanism comprises a driving motor, a driving turntable, a driven turntable and a saw band, the driving turntable and the driven turntable are both rotationally connected onto the cutting support, the saw band is sleeved on the outer peripheral surfaces of the driving turntable and the driven turntable, the driving motor is fixedly connected onto the cutting support, the driving motor is in transmission connection with the driving turntable, a feeding device for driving the cutting support to slide is further arranged on the main support, the feeding device comprises a first lead screw and a torsion limiting mechanism, one end of the first lead screw is fixedly connected onto the main support, the torsion limiting mechanism comprises a first connecting shaft, a second connecting shaft and a clamping assembly, and the first connecting shaft is in threaded connection with the first lead screw, the second connecting shaft is sleeved on the peripheral surface of the first lead screw, the second connecting shaft is connected with the first lead screw in a coaxial rotating manner, the second connecting shaft is connected with the driving motor in a transmission manner, the second connecting shaft is arranged above the first connecting shaft, the cutting support is further fixedly connected with a first shaft sleeve and a second shaft sleeve, the first shaft sleeve is sleeved on the peripheral surface of the first lead screw and is abutted against the upper end surface of the second connecting shaft, the second shaft sleeve is also sleeved on the peripheral surface of the first lead screw and is abutted against the lower end surface of the first connecting shaft, the clamping assembly comprises a first compression spring and clamping pins, the second connecting shaft is close to the end surface of the first connecting shaft and is uniformly provided with a plurality of clamping pin grooves along the self axis, and the first compression spring and the clamping pins are all arranged in the clamping pin grooves in a penetrating manner, the both ends of first compression spring respectively with the second connecting axle with the bayonet lock butt, first connecting axle is close to seted up the application of force groove on the terminal surface of second connecting axle, the bayonet lock is kept away from first compression spring's one end joint is in the application of force inslot, the bayonet lock is kept away from first compression spring's one end has been seted up the spigot surface, the spigot surface has also been seted up in the application of force inslot.
By adopting the technical scheme, when cutting materials, the driving motor is started to drive the driving turntable to rotate, the driving turntable drives the saw belt to rotate, the driving motor drives the second connecting shaft to rotate, the second connecting shaft drives the first connecting shaft to rotate under the action of the clamping assembly with constant force, the cutting bracket rotates at the same speed as the first connecting shaft under the action of self gravity when the saw belt does not contact the materials, so that the saw belt is quickly abutted against the materials, the materials can provide resistance to the saw belt after the saw belt is abutted against the materials, the rotating speed of the first connecting shaft is lower than that of the second connecting shaft, the torque force provided by the second connecting shaft is constant, so that the first connecting shaft feeds downwards under constant pressure, and when the cutting resistance borne by the saw belt is large, the feeding speed of the first connecting shaft is slowed down, when the cutting resistance of the saw band handbag is small, the feeding speed of the first connecting shaft can be accelerated, so that the saw band can be cut at the optimal cutting speed, the cutting time is shortened, the cutting efficiency is improved, the abrasion rate of the saw band is reduced, the service life of the saw band is prolonged, meanwhile, the saw band is not prone to shifting during cutting, and the cutting quality is improved.
The present invention in a preferred example may be further configured to: the feeding devices are arranged in two groups, and the two groups of feeding devices are respectively arranged on two sides of the cutting support.
Through adopting above-mentioned technical scheme, the one side that the cutting support is close to initiative carousel is the same with the feed force that the one side that the cutting support is close to driven turntable received, and then makes the downward feed that the cutting support both sides homoenergetic is stable, has reduced the dead probability of cutting support card at the in-process of feeding, makes the resistance that both sides received the same around the saw area rotation direction simultaneously, prolongs the life-span of saw area, improves cutting accuracy.
The present invention in a preferred example may be further configured to: the torsion limiting mechanism further comprises an adjusting assembly, the adjusting assembly comprises a butt plate and an end cover, the end cover is arranged on the outer peripheral face of the first lead screw, the end cover is arranged between the second connecting shaft and the first shaft sleeve, the end cover is further in threaded connection with the second connecting shaft, the butt plate is also arranged on the outer peripheral face of the first lead screw, the butt plate is arranged between the end cover and the second connecting shaft, one end of the butt plate is abutted to the end cover, the other end of the butt plate is far away from the first compression spring through one end of the clamping pin, and the butt plate is connected with the first lead screw in a sliding mode.
Through adopting above-mentioned technical scheme, worn out one end time at the saw area after, the cutting ability of saw area can descend thereupon, rotate the end cover this moment, make the butt plate slide towards the one end of keeping away from the second connecting axle, and then reduce the torsion of second connecting axle to first connecting axle, reduce the feed rate of saw area, so make the feed rate of saw area can carry out the adaptation with the wearing and tearing condition of saw area, reduce the probability that the saw area takes place the skew when the cutting, the cutting precision is improved, the probability of saw area rupture has been reduced simultaneously, the life-span of saw area has been prolonged.
The present invention in a preferred example may be further configured to: the outer section of the end cover is regular hexagon, and the outer section of the second connecting shaft is also regular hexagon.
Through adopting above-mentioned technical scheme, when the size of adjustment saw area feed power, only need to use the spanner to twist the end cover can, convenient operation, when twisting the end cover, use another spanner fixed second connecting axle, when avoiding twisting the end cover, the second connecting axle moves along with the end cover is together.
The present invention in a preferred example may be further configured to: the end cover with be provided with first thrust ball bearing between the first shaft sleeve, the both ends of first thrust ball bearing respectively with the end cover with first shaft sleeve butt, first connecting shaft with be provided with second thrust ball bearing between the second shaft sleeve, the both ends of second thrust ball bearing respectively with the second shaft sleeve with first connecting shaft butt.
Through adopting above-mentioned technical scheme, reduced between first axle sleeve and the second connecting axle, the frictional force between second axle sleeve and the first connecting axle, drive the precision of power when having improved the first connecting axle of second connecting axle drive, and then promoted cutting accuracy.
The present invention in a preferred example may be further configured to: the driving motor is connected with the second connecting shaft through a transmission mechanism, the transmission mechanism comprises a first gear, a transmission shaft, a second gear, a planet carrier, a planet wheel, a third gear, a fourth gear, a worm and a reversing assembly, the first gear is coaxially and fixedly connected with an output shaft of the driving motor, the transmission shaft is rotatably connected with the cutting support, the second gear and the third gear are both rotatably connected with the transmission shaft, the planet carrier is coaxially and fixedly connected with the transmission shaft, the planet wheel is rotatably connected with the planet carrier, the planet wheel is meshed with the second gear and the third gear, the first gear is meshed with the second gear, the fourth gear is meshed with the third gear, the worm is coaxially and fixedly connected with the fourth gear, and the turbine is fixedly connected with the outer peripheral surface of the second connecting shaft, the worm with the turbine meshing, the switching-over subassembly includes first fixture block, first fixture block cover is established on the transmission shaft, just first fixture block is followed the axial of transmission shaft with the transmission shaft slides and is connected, first fixture block still with the transmission shaft joint, first fixture block still with cutting support joint or with the second gear joint.
By adopting the technical scheme, when the saw belt cuts the raw material, the first clamping block is clamped with the second gear, the driving motor drives the first gear to rotate at the moment, the first gear drives the second gear to rotate, the transmission shaft and the second gear rotate coaxially and at the same speed due to the clamping connection of the first clamping block and the second gear, and then the third gear and the second gear rotate coaxially and at the same speed through the transmission of the planet carrier and the planet gear, so that the worm and the driving motor rotate in the same direction, and the second connecting shaft drives the cutting support to perform working feeding; after the saw band finishes cutting of materials, the first clamping block is clamped with the cutting support, the driving motor drives the first gear to rotate at the moment, the first gear drives the second gear to rotate, the rotating shaft and the cutting support are kept motionless due to the fact that the first clamping block is clamped with the cutting support, the planet carrier is also kept motionless with the cutting support, the third gear and the second gear rotate coaxially and reversely under the transmission of the planet gear, the worm and the driving motor rotate reversely, and the second connecting shaft drives the cutting support to move upwards to perform fast retreating.
The present invention in a preferred example may be further configured to: and force application surfaces are respectively arranged on one side of the clamping pin, which is far away from the guide surface of the clamping pin, and one side of the force application groove, which is far away from the guide surface of the force application groove.
Through adopting above-mentioned technical scheme, accomplish the cutting back of material at the saw band, second connecting axle antiport, the application of force face on the bayonet lock and the application of force face butt in the application of force inslot this moment, and then make first connecting axle and second connecting axle rotate with fast, and torque force limiting mechanism no longer exerts the torque force restriction this moment, and the cutting support that makes can reset fast has improved production efficiency.
The present invention in a preferred example may be further configured to: the reversing assembly further comprises an electromagnet, a guide post, a second fixture block and a second compression spring, the electromagnet is fixedly connected to the cutting support, the guide post penetrates through the electromagnet, the guide post is connected to the electromagnet in a sliding mode along the axial direction of the rotating shaft, the second fixture block is fixedly connected to the guide post, the guide post is far away from one end of the electromagnet, a first clamping groove is formed in the outer peripheral face of the first fixture block, the second fixture block is connected with the first clamping groove in a clamping mode, the second compression spring is sleeved on the outer peripheral face of the guide post, one end of the second compression spring is fixedly connected with the electromagnet, and the other end of the second compression spring is fixedly connected with the second fixture block.
By adopting the technical scheme, when the first clamping block is required to be clamped with the cutting support, the electromagnet is powered on, so that the second clamping block slides towards the cutting support, the second clamping block drives the first clamping block to slide towards the cutting support together, the first clamping block is clamped with the cutting support, and the saw band is fed; when the first clamping block is required to be clamped with the second gear, the electromagnet is powered off, the second clamping block slides towards the second gear under the pushing of the second compression spring, the second clamping block drives the first clamping block to be separated from the cutting support and then clamped with the second gear, and the saw belt is quickly retreated.
The present invention in a preferred example may be further configured to: the reversing assembly further comprises a first contact switch and a second contact switch, the first contact switch and the second contact switch are all sleeved on the outer peripheral surface of the first lead screw, the first contact switch is arranged at the bottom end of the first lead screw and fixedly connected with the main support, the second contact switch is arranged at the top end of the first lead screw, the first shaft sleeve is abutted to the second contact switch, the second shaft sleeve is abutted to the first contact switch, and the first contact switch and the second contact switch are all electrically connected with the electromagnet.
By adopting the technical scheme, after the saw belt finishes cutting raw materials, the second shaft sleeve is abutted against the first contact switch, the first contact switch is powered on, the first contact switch controls the electromagnet to be powered off, the first clamping block is clamped with the second gear, and the cutting support moves upwards to reset under the driving of the driving motor; when first axle sleeve and second contact switch butt, second contact switch is got electric, and second contact switch control electro-magnet gets electric, and then makes first fixture block and cutting support joint, so the cutting support alright reset immediately after the cutting finishes, has improved cutting efficiency.
The present invention in a preferred example may be further configured to: the second contact switch is connected with the first lead screw in a sliding mode along the axis of the first lead screw, the reversing assembly further comprises a fastening bolt, the fastening bolt is connected with the second contact switch in a threaded mode, and one end, far away from the bolt head, of the fastening bolt is abutted to the first lead screw.
Through adopting above-mentioned technical scheme, when the inequality raw materials of cutting diameter, the distance that the cutting support worker advances also can change along with two diameters of raw materials, and when the diameter of raw materials was less, slided second contact switch towards the one end that is close to first contact switch, later screwed up fastening bolt again, so the distance of cutting support when moving back soon alright shorten, improved cutting efficiency, reduced the energy consumption.
In summary, the invention includes at least one of the following beneficial technical effects:
1. through setting up of torsion limiting mechanism, make first connecting axle feed downwards with invariable pressure, when the cutting resistance that the saw band received is great, the feed speed of first connecting axle just can slow down, when the cutting resistance of saw band handbag is less, the feed speed of first connecting axle just can accelerate, so can make the saw band cut with optimal cutting speed, reduce the time of cutting, promote cutting efficiency, the speed that has reduced saw band wearing and tearing simultaneously, the life-span of saw band has been prolonged, the saw band is difficult for taking place the skew when the cutting simultaneously, the cutting quality has been improved.
2. Through the setting of adjusting part, can be according to the difference of saw area degree of wear, automatically for the saw area adjustment feed power to furthest exerts the cutting force of saw area, make the feed rate of saw area can carry out the adaptation with the wearing and tearing condition of saw area, reduce the saw area and take place the probability of skew when the cutting, improved cutting accuracy, reduced the probability of saw area rupture simultaneously, prolonged the life-span of saw area.
3. Through the arrangement of the transmission mechanism, the cutting support can automatically adjust fast forward and fast backward, so that the cutting time is saved, and the cutting efficiency is improved.
4. Through the setting of switching-over subassembly, can change the direction of sliding of cutting support automatically after the saw area is accomplished the cutting of material, reduced operating personnel's intensity of labour, improved work efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of a blanking end of the prior art;
FIG. 2 is a schematic view of the overall structure of a loading end of the prior art;
FIG. 3 is a schematic sectional view showing the entire structure of the present embodiment;
FIG. 4 is a partial schematic structural view of the feeding mechanism in the present embodiment;
FIG. 5 is a partial schematic structural view of the torque limiting mechanism of the present embodiment;
FIG. 6 is an exploded view of the latch and the first connecting shaft to show the structure of the force applying groove and the latch;
FIG. 7 is a partial schematic structural view of the transmission mechanism in the present embodiment;
fig. 8 is a schematic sectional view of the transmission mechanism in the embodiment, which is intended to embody the structure of the reversing assembly.
Reference numerals: 11. a main support; 12. cutting the stent; 13. a clamping mechanism; 14. a hydraulic cylinder; 15. an active turntable; 16. a driven turntable; 17. a saw band; 18. a drive motor; 2. a feeding device; 21. a first lead screw; 22. a torque limiting mechanism; 221. a first connecting shaft; 2211. a force application groove; 2212. a first ball groove; 222. a second connecting shaft; 2221. a latch slot; 223. a clamping assembly; 2231. a first compression spring; 2232. a bayonet lock; 224. an adjustment assembly; 2241. an end cap; 2242. a butt joint plate; 2243. a second ball bearing; 2244. a second ball groove; 225. a first ball bearing; 226. a turbine; 227. a guide surface; 228. a force application surface; 23. a first bushing; 24. a second shaft sleeve; 241. a connecting plate; 25. a first thrust ball bearing; 26. a second thrust ball bearing; 27. a second lead screw; 28. fastening a nut; 3. a transmission mechanism; 31. a first gear; 32. a drive shaft; 33. a second gear; 34. a planet carrier; 35. a planet wheel; 36. a third gear; 37. a fourth gear; 38. a worm; 39. a commutation assembly; 391. a first clamping block; 392. an electromagnet; 393. a guide post; 394. a second fixture block; 395. a second compression spring; 396. a first contact switch; 397. a second contact switch; 398. fastening a bolt; 41. a first card slot; 42. a second card slot; 43. and a third card slot.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 3 and 4, the present embodiment provides a constant-force feeding band sawing machine, which includes a main support 11 and a cutting support 12, wherein the main support 11 is connected to the cutting through a feeding device 2. The feeding device 2 comprises a first lead screw 21, and the lower end of the first lead screw 21 is welded on the upper end surface of the main bracket 11.
Referring to fig. 4 and 5, the outer circumferential surface of the first lead screw 21 is sleeved with the torque limiting mechanism 22, the torque limiting mechanism 22 includes a first connecting shaft 221 and a second connecting shaft 222, and the first connecting shaft 221 and the second connecting shaft 222 are both sleeved on the outer circumferential surface of the first lead screw 21. The first connecting shaft 221 is connected with the first lead screw 21 by a thread, and the second connecting shaft 222 is connected with the first lead screw 21 coaxially and rotatably.
The first connection shaft 221 and the second connection shaft 222 are connected by a clamping assembly 223, and the clamping assembly 223 includes a first compression spring 2231 and a clamping pin 2232. The second connecting shaft 222 is provided with a plurality of latch grooves 2221 through which the first compression spring 2231 and the latches 2232 pass, the length direction of the latch grooves 2221 is parallel to the axial direction of the second connecting shaft 222, and the latch grooves 2221 are uniformly formed along the axis of the second connecting shaft 222.
Referring to fig. 5 and 6, the first compression spring 2231 and the locking pin 2232 are sequentially inserted into the locking pin slot 2221, the locking pin 2232 is disposed at a side of the first compression spring 2231 close to the first connecting shaft 221, and the first compression spring 2231 abuts against the locking pin 2232. An end face of the first connecting shaft 221 close to the second connecting shaft 222 is provided with a force application groove 2211 matched with the bayonet 2232, and the force application groove 2211 is in a shape of a quarter sphere. The curved surface of the force application groove 2211 is the guide surface 227, and the flat surface of the force application groove 2211 is the force application surface 228. The end of detent 2232 near first coupling shaft 221 is also quarter-spherical, the curved surface on detent 2232 being guide surface 227 and the flat surface on detent 2232 being force-applying surface 228.
A first ball groove 2212 is formed in an end surface of the first connecting shaft 221 close to the second connecting shaft 222 and an end surface of the second connecting shaft 222 close to the first connecting shaft 221, and the first ball groove 2212 is annularly arranged and is coaxial with the first connecting shaft 221. A plurality of first balls 225 are rotatably connected to the first ball grooves 2212, and the first connection shaft 221 and the second connection shaft 222 are rotatably supported by the first balls 225.
Referring to fig. 5, an end of the second connecting shaft 222, which is far away from the first connecting shaft 221, is further provided with an adjusting assembly 224 for adjusting torque, the adjusting assembly 224 includes an end cover 2241, and the end cover 2241 is threadedly connected to an end of the second connecting shaft 222, which is far away from the first connecting shaft 221. An abutting plate 2242 is arranged between the end cover 2241 and the second connecting shaft 222, the abutting plate 2242 is coaxially arranged in the end cover 2241 in a penetrating mode, and the abutting plate 2242 and the end cover 2241 are connected with the second connecting shaft 222 in a sliding mode coaxially.
The abutting plate 2242 is provided with a second ball groove 2244 on an end face far away from the second connecting shaft 222, the end face of the end cover 2241 close to the second connecting shaft 222 is also provided with a second ball groove 2244, and the second ball groove 2244 is also arranged in an annular shape and is coaxial with the abutting plate 2242. A plurality of second balls 2243 are connected to the second ball grooves 2244 in a rolling manner, and the contact plate 2242 and the end cover 2241 are supported in a rolling manner by the second balls 2243. An end of the first compression spring 2231 remote from the bayonet 2232 is abutted against or welded to an end face of the abutment plate 2242 close to the second connecting shaft 222.
By rotating the end cover 2241 to adjust the distance between the abutting plate 2242 and the second connecting shaft 222, the torque applied by the second connecting shaft 222 to the first connecting shaft 221 can be adjusted. In order to adjust the distance between the abutting plate 2242 and the second connecting shaft 222, the outer cross section of the end cover 2241 is regular hexagonal, and the outer cross section of the second connecting shaft 222 is also regular hexagonal, so that an operator can screw the end cover 2241 and the second connecting shaft 222 with a wrench.
Referring to fig. 4 and 5, the feeding mechanism further includes a first shaft sleeve 23 and a second shaft sleeve 24, the first shaft sleeve 23 and the second shaft sleeve 24 are both sleeved on the outer peripheral surface of the first lead screw 21, and the first shaft sleeve 23, the second connecting shaft 222, the first connecting shaft 221 and the second shaft sleeve 24 are sequentially arranged on the shaft center of the first lead screw 21 from top to bottom.
A first thrust ball bearing 25 is arranged between the first shaft sleeve 23 and the end cover 2241, and both ends of the first thrust ball bearing 25 are respectively abutted against the end cover 2241 and the first shaft sleeve 23. A second thrust ball bearing 26 is provided between the first connecting shaft 221 and the second sleeve 24, and both ends of the second thrust ball bearing 26 are respectively abutted against the second sleeve 24 and the first connecting shaft 221.
The first shaft sleeve 23 is directly fixedly connected to the cutting support 12 in a welding manner, and the second shaft sleeve 24 is slidably connected to the cutting support 12 along the axial direction of the first lead screw 21. The cutting support 12 is welded with a second lead screw 27 parallel to the first lead screw 21, the outer circumferential surface of the second shaft sleeve 24 is welded with a connecting plate 241, the second lead screw 27 penetrates through the second connecting plate 241 and then is in threaded connection with a fastening nut 28, and the second shaft sleeve 24 is tightly abutted to the second thrust ball bearing 26 by the fastening nut 28.
Referring to fig. 3 and 7, the driving motor 18 is connected to the torque limiting mechanism 22 through the transmission mechanism 3, the transmission mechanism 3 includes a first gear 31, and the first gear 31 is coaxially connected to an output shaft of the driving motor 18. The transmission mechanism 3 further comprises a transmission shaft 32, the transmission shaft 32 is rotatably connected to the cutting support 12, and the axis of the transmission shaft 32 is parallel to the axis of the output shaft of the driving motor 18.
The transmission shaft 32 is coaxially and rotatably connected with a second gear 33 and a third gear 36, a planet carrier 34 is arranged between the second gear 33 and the third gear 36, and the planet carrier 34 is coaxially welded on the transmission shaft 32 or integrally formed with the transmission shaft 32. A plurality of planet wheels 35 are rotatably connected to the planet carrier 34, the axes of the planet wheels 35 are perpendicular to the axis of the transmission shaft 32, and the planet wheels 35 are meshed with the second gear 33 and the third gear 36.
Referring to fig. 5 and 7, the first gear 31 meshes with the second gear 33, the third gear 36 further meshes with a fourth gear 37, and the axial center of the fourth gear 37 is parallel to the axial center of the third gear 36. The fourth gear 37 is coaxially welded or clamped with the worm 38, the worm wheel 226 is integrally formed or welded on the outer peripheral surface of the second connecting shaft 222, and the worm 38 is meshed with the worm wheel 226.
Referring to fig. 7 and 8, the transmission mechanism 3 includes a reversing assembly 39 for reversing the rotation direction of the fourth gear 37, the reversing assembly 39 includes a first latch 391, the first latch 391 is coaxially connected to the outer circumferential surface of the transmission shaft 32, and the first latch 391 is slidably connected to the transmission shaft 32 along the axial direction of the transmission shaft 32. A second engaging groove 42 adapted to the first engaging block 391 is formed on an end surface of the cutting support 12 close to the first engaging block 391, and a third engaging groove 43 adapted to the first engaging block 391 is formed on an end surface of the second gear 33 far from the third gear 36. The first latch 391 may be engaged with the second latch slot, or the first latch 391 may be engaged with the third latch slot 43.
The reversing assembly 39 further comprises an electromagnet 392 for controlling the sliding movement of the first clamping block 391, and the electromagnet 392 is fixedly connected to the cutting support 12 through screws. A guide post 393 penetrates through the electromagnet 392, the axis of the guide post 393 is parallel to the axis of the transmission shaft 32, and the guide post 393 is connected with the electromagnet 392 in a sliding manner along the axis of the guide post 393.
One end of the guide post 393, which is far away from the electromagnet 392, is fixedly connected with a second clamping block 394 through a screw, a first clamping groove 41 is formed in the outer peripheral surface of the first clamping block 391, and the second clamping block 394 is clamped with the first clamping groove 41. A second compression spring 395 is further sleeved on the outer peripheral surface of the guide post 393, one end of the second compression spring 395 abuts against the second clamping block 394, and the other end of the second compression spring 395 abuts against the electromagnet 392.
Referring to fig. 4 and 8, the reversing assembly 39 further includes a first contact switch 396 and a second contact switch 397 for controlling the electromagnet 392, and the first contact switch 396 and the second contact switch 397 are both disposed on the outer peripheral surface of the first lead screw 21. First contact switch 396 is disposed at the bottom end of first lead screw 21, and first contact switch 396 is fixedly connected with main bracket 11 through a screw. The second contact switch 397 is disposed at a top end of the first lead screw 21, and the second contact switch 397 is slidably connected to the first lead screw 21 along an axial direction of the first lead screw 21.
A fastening bolt 398 is further inserted in the second contact switch 397 in the radial direction, the fastening bolt 398 is in threaded connection with the second contact switch 397, and one end of the fastening bolt 398 away from the bolt head thereof passes through the second contact switch 397 and then abuts against the first lead screw 21. The first contact switch 396 abuts against the second bushing 24, the second contact switch 397 is mounted on the first bushing 23, both the first contact switch 396 and the second contact switch 397 are electrically connected to the electromagnet 392, and the second contact switch 397 is also electrically connected to the driving motor 18.
Referring to fig. 3, two sets of driving motors 18, two sets of transmission mechanisms 3 and two sets of feeding devices 2 are respectively arranged at two ends of the cutting support 12 in the length direction, and one driving motor 18 corresponds to one set of transmission mechanism 3 and one set of feeding device 2. Or the driving motor 18 and the transmission device are only arranged in one group, the feeding devices 2 are arranged in two groups in the length direction of the cutting support 12, and the transmission mechanism 3 is in transmission connection with the two groups of feeding devices 2.
The implementation principle of the embodiment is as follows:
before cutting, the distance between the abutting plate 2242 and the second connecting shaft 222 is adjusted according to the wear degree of the saw belt 17, so that the torsion of the torsion limiting mechanism 22 is adjusted, the position of the second contact switch 397 is adjusted according to the material diameter, and then the fastening nut 28 is adjusted to tightly press the first connecting shaft 221 and the second connecting shaft 222; then, starting a driving motor 18, wherein the driving motor 18 drives a saw belt 17 to rotate and simultaneously drives the cutting support 12 to feed downwards; after the saw belt 17 contacts with the material, the saw belt 17 is subjected to cutting resistance, at this time, the first connecting shaft 221 and the second connecting shaft 222 rotate relatively, the second connecting shaft 222 gives a constant torque to the first connecting shaft 221, the first connecting shaft 221 and the first lead screw 21 convert the torque into the feeding force of the cutting support 12, the cutting force of the cutting support 12 is constant due to the constant torque between the second connecting shaft 222 and the first connecting shaft 221, when the thickness of the material in the moving direction of the saw belt 17 is large, the feeding speed of the cutting support 12 is slow, when the thickness of the material in the moving direction of the saw belt 17 is small, the feeding speed of the cutting support 12 is fast, and the saw belt 17 is further cut at the optimal cutting speed, so that the cutting efficiency is improved, the service life of the saw belt 17 is prolonged, and meanwhile, the saw belt 17 is not easy to deviate during cutting, and the cutting quality is improved.
After cutting, the second shaft sleeve 24 abuts against the first contact switch 396, at this time, the electromagnet 392 is de-energized, the first fixture block 391 is clamped with the second gear 33, and the cutting support 12 moves upwards to reset under the driving of the driving motor 18; when the first shaft sleeve 23 abuts against the second contact switch 397, the second contact switch 397 is powered on, the second contact switch 397 controls the electromagnet 392 to be powered on, the first fixture block 391 is clamped with the cutting support 12 to prepare for next feeding, meanwhile, the driving motor 18 stops rotating, and an operator feeds materials to the sawing machine at the moment; therefore, the cutting support 12 can be reset immediately after the cutting is finished, and the cutting efficiency is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a band sawing machine that constant force fed, includes main support (11) and cutting support (12), be provided with cutting mechanism on cutting support (12), cutting mechanism includes driving motor (18), initiative carousel (15), driven turntable (16) and saw area (17), initiative carousel (15) with driven turntable (16) all rotates to be connected on cutting support (12), saw area (17) cover is established initiative carousel (15) with on the outer peripheral face of driven turntable (16), driving motor (18) fixed connection in cutting support (12), just driving motor (18) with initiative carousel (15) transmission is connected, its characterized in that,
the main bracket (11) is further provided with a feeding device (2) for driving the cutting bracket (12) to slide, the feeding device (2) comprises a first lead screw (21) and a torsion limiting mechanism (22), one end of the first lead screw (21) is fixedly connected to the main bracket (11), the torsion limiting mechanism (22) comprises a first connecting shaft (221), a second connecting shaft (222) and a clamping assembly (223), the first connecting shaft (221) is in threaded connection with the first lead screw (21), the second connecting shaft (222) is sleeved on the outer peripheral surface of the first lead screw (21), the second connecting shaft (222) is coaxially and rotatably connected with the first lead screw (21), the second connecting shaft (222) is also in transmission connection with the driving motor (18), and the second connecting shaft (222) is arranged above the first connecting shaft (221), the cutting support (12) is further fixedly connected with a first shaft sleeve (23) and a second shaft sleeve (24), the first shaft sleeve (23) is sleeved on the peripheral surface of the first lead screw (21), the first shaft sleeve (23) abuts against the upper end surface of the second connecting shaft (222), the second shaft sleeve (24) is also sleeved on the peripheral surface of the first lead screw (21), the second shaft sleeve (24) abuts against the lower end surface of the first connecting shaft (221), the clamping assembly (223) comprises a first compression spring (2231) and clamping pins (2232), the second connecting shaft (222) is close to the end surface of the first connecting shaft (221), a plurality of clamping pin grooves (2221) are uniformly formed in the end surface of the first connecting shaft along the axis of the second connecting shaft, the first compression spring (2231) and the clamping pins (2232) penetrate through the clamping pin grooves (2221), two ends of the first compression spring (2231) are respectively abutted against the second connecting shaft (222) and the clamping pins (2232), first connecting axle (221) is close to seted up application of force groove (2211) on the terminal surface of second connecting axle (222), bayonet lock (2232) are kept away from the one end joint of first compression spring (2231) is in application of force groove (2211), bayonet lock (2232) are kept away from the one end of first compression spring (2231) has seted up spigot surface (227), spigot surface (227) have also been seted up in application of force groove (2211).
2. The constant force feed band saw machine according to claim 1, wherein: the feeding devices (2) are arranged in two groups, and the two groups of feeding devices (2) are respectively arranged on two sides of the cutting support (12).
3. The constant force feed band saw machine according to claim 1, wherein: the torsion limiting mechanism (22) further comprises an adjusting component (224), the adjusting component (224) comprises a butt plate (2242) and an end cover (2241), the end cover (2241) is sleeved on the outer peripheral surface of the first lead screw (21), and the end cover (2241) is disposed between the second connecting shaft (222) and the first sleeve (23), the end cover (2241) is further in threaded connection with the second connecting shaft (222), the abutting plate (2242) is also sleeved on the outer peripheral surface of the first lead screw (21), the abutting plate (2242) is disposed between the end cover (2241) and the second connecting shaft (222), one end of the abutting plate (2242) abuts against the end cover (2241), the other end of the abutting plate (2242) abuts against one end, far away from the bayonet lock (2232), of the first compression spring (2231), butt plate (2242) follow the axle center of first lead screw (21) with first lead screw (21) slide and are connected.
4. A constant force feed band saw machine according to claim 3 wherein: the outer section of the end cover (2241) is regular hexagon, and the outer section of the second connecting shaft (222) is also regular hexagon.
5. The constant force feed band saw machine of claim 4, wherein: end cover (2241) with be provided with first thrust ball bearing (25) between first axle sleeve (23), the both ends of first thrust ball bearing (25) respectively with end cover (2241) with first axle sleeve (23) butt, first connecting axle (221) with be provided with second thrust ball bearing (26) between second axle sleeve (24), the both ends of second thrust ball bearing (26) respectively with second axle sleeve (24) with first connecting axle (221) butt.
6. A constant force feed band saw machine according to any one of claims 1-5 wherein: the driving motor (18) is connected with the second connecting shaft (222) through a transmission mechanism (3), the transmission mechanism (3) comprises a first gear (31), a transmission shaft (32), a second gear (33), a planet carrier (34), a planet wheel (35), a third gear (36), a fourth gear (37), a worm (38) and a reversing assembly (39), the first gear (31) is coaxially and fixedly connected with an output shaft of the driving motor (18), the transmission shaft (32) is rotatably connected with the cutting support (12), the second gear (33) and the third gear (36) are both rotatably connected on the transmission shaft (32), the planet carrier (34) is coaxially and fixedly connected on the transmission shaft (32), the planet wheel (35) is rotatably connected on the planet carrier (34), and the planet wheel (35) is meshed with the second gear (33) and the third gear (36), the first gear (31) is meshed with the second gear (33), the fourth gear (37) is meshed with the third gear (36), the worm (38) is coaxially and fixedly connected with the fourth gear (37), a turbine (226) is fixedly connected to the outer peripheral surface of the second connecting shaft (222), the worm (38) is meshed with the turbine (226), the reversing assembly (39) comprises a first clamping block (391), the first clamping block (391) is sleeved on the transmission shaft (32), the first clamping block (391) is connected with the transmission shaft (32) in a sliding mode along the axial direction of the transmission shaft (32), the first clamping block (391) is further clamped with the transmission shaft (32), and the first clamping block (391) is further clamped with the cutting support (12) or the second gear (33).
7. The constant force feed band saw machine of claim 6, wherein: the side of the bayonet pin (2232) far away from the guide surface (227) and the side of the force application groove (2211) far away from the guide surface (227) are both provided with a force application surface (228).
8. The constant force feed band saw machine of claim 6, wherein: the reversing assembly (39) further comprises an electromagnet (392), a guide post (393), a second clamping block (394) and a second compression spring (395), the electromagnet (392) is fixedly connected to the cutting bracket (12), the guide post (393) penetrates through the electromagnet (392), the guide post (393) is connected with the electromagnet (392) in a sliding mode along the axial direction of the rotating shaft, the second clamping block (394) is fixedly connected to one end, far away from the electromagnet (392), of the guide post (393), a first clamping groove (41) is formed in the outer peripheral surface of the first clamping block (391), the second clamping block (394) is clamped with the first clamping groove (41), the second compression spring (395) is sleeved on the outer peripheral surface of the guide post (393), and one end of the second compression spring (395) is fixedly connected with the electromagnet (392), the other end of the second compression spring (395) is fixedly connected with the second clamping block (394).
9. The constant force feed band saw machine of claim 8, wherein: the reversing assembly (39) further comprises a first contact switch (396) and a second contact switch (397), the first contact switch (396) and the second contact switch (397) are sleeved on the outer peripheral surface of the first lead screw (21), the first contact switch (396) is arranged at the bottom end of the first lead screw (21) and is fixedly connected with the main bracket (11), the second contact switch (397) is arranged at the top end of the first lead screw (21), the first shaft sleeve (23) is abutted against the second contact switch (397), the second shaft sleeve (24) is abutted against the first contact switch (396), and the first contact switch (396) and the second contact switch (397) are electrically connected with the electromagnet (392).
10. The constant force feed band saw machine of claim 9, wherein: the second contact switch (397) is connected with the first lead screw (21) in a sliding mode along the axis of the first lead screw (21), the reversing assembly (39) further comprises a fastening bolt (398), the fastening bolt (398) is in threaded connection with the second contact switch (397), and one end, away from the bolt head of the fastening bolt (398), abuts against the first lead screw (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010561485.7A CN111730135A (en) | 2020-06-18 | 2020-06-18 | Constant force feeding band sawing machine |
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| CN202010561485.7A CN111730135A (en) | 2020-06-18 | 2020-06-18 | Constant force feeding band sawing machine |
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