CN215236968U

CN215236968U - Pressing mechanism of bending machine

Info

Publication number: CN215236968U
Application number: CN202121289324.3U
Authority: CN
Inventors: 陈德军; 严玉胜; 严粤粤
Original assignee: Dongguan Dasheng Laser Machinery Technology Co ltd
Current assignee: Dongguan Dasheng Laser Machinery Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-21
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a hold-down mechanism of bender, including compressing tightly the base, being located compress tightly mounting panel, the drive of base top mounting panel drive arrangement, the center that the mounting panel reciprocated press the sword, set up and be in just be used for the drive on the mounting panel the center that the sword reciprocated is pressed to the center presses sword drive arrangement, sets up respectively just be located on the mounting panel the left side tool changing mechanism and the right side tool changing mechanism of the center left and right sides press the sword, and set up respectively and be in just be located respectively on the mounting panel left side tool changing mechanism and the right side tool changing mechanism left side select sword mechanism and right side to select sword mechanism. The utility model has the advantages of reasonable structure, compact structure, convenient use, stable use and the like; it can come the adjustment to compress tightly the size of cutter according to the size of panel for the area that compresses tightly when the cutter compresses tightly on panel is more identical with the top surface of panel, thereby makes to compress tightly the effect better, and can be applicable to the use of not unidimensional panel.

Description

Pressing mechanism of bending machine

Technical Field

The utility model relates to a panel technical field that bends specifically is a hold-down mechanism who relates to a bender.

Background

A bending machine is a machine capable of bending a thin plate. The bending machine generally comprises a plate feeding mechanism, a pressing mechanism and a bending mechanism which are sequentially arranged from front to back. However, many of the current hold-down mechanisms are press knives (i.e., knives) that are only of a fixed size. When the device is used, the plate is pressed by driving the cutter to move up and down, however, the size of the cutter cannot be correspondingly adjusted according to the size of the plate, so that when plates with different sizes are machined, the bottom surface of the cutter cannot be matched with the top surface of the plate in many times, namely, the area of the bottom surface of the cutter is larger than or smaller than the area of the top surface of the plate when the cutter is pressed on the plate, so that the pressing effect is not good enough, and the device cannot be suitable for plates with different sizes.

Accordingly, there is a need for improvements in the art.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a pressing mechanism of a bending machine, which has the advantages of reasonable structure, compact structure, convenient use, stable use and the like; it can correspond the size that the adjustment compressed tightly the cutter according to the size of panel for the area that compresses tightly when the cutter compresses tightly on panel is more identical with the top surface of panel, thereby makes to compress tightly the effect better, and can be applicable to the use of not unidimensional panel.

In order to realize the purpose, the technical scheme of the utility model is that:

the utility model provides a hold-down mechanism of bender, is including compressing tightly the base, being located compress tightly mounting panel, the drive of base top mounting panel drive arrangement, the center sword of pressing, setting that the mounting panel reciprocated are in just be used for the drive on the mounting panel the center sword drive arrangement that the center sword reciprocated, set up respectively just be located on the mounting panel the left side tool changing mechanism and the right side tool changing mechanism of the center sword left and right sides are pressed to and set up respectively just be located on the mounting panel the left side of left side tool changing mechanism and right side tool changing mechanism left and right sides selects sword mechanism and right side to select sword mechanism.

For the additional structure of the above technical scheme, the following scheme is also included:

as a specific embodiment, the mounting plate driving device comprises a fixedly arranged mounting plate driving motor and a mounting plate connecting rod assembly which is in transmission connection with the mounting plate driving motor and is hinged with the upper end of the mounting plate at the lower end.

Furthermore, the mounting plate driving motor and the mounting plate connecting rod assembly are both arranged on a fixed plate which is fixedly arranged; the mounting plate driving motor is in transmission with the mounting plate connecting rod assembly through a fulcrum shaft arranged on the fixing plate.

As a specific embodiment, each of the left tool changing mechanism and the right tool changing mechanism comprises a tool changing moving frame, a tool changing driving cylinder fixed on the mounting plate and used for driving the tool changing moving frame to move left and right, a plurality of overturning pressing tools arranged on the tool changing moving frame side by side in the left-right direction, a hooking block arranged above the overturning pressing tools and used for hooking the overturning pressing tools, a hooking block driving device arranged on the tool changing moving frame and used for driving the hooking block to overturn front and back, an inserting rod capable of moving left and right and inserted in through holes of the overturning pressing tools, an inserting plate capable of moving left and right and inserted in slots of the overturning pressing tools, an inserting piece driving device arranged on the tool changing moving frame and used for driving the inserting rod and the inserting plate to move left and right, and an inserting rod overturning device arranged on the moving frame and used for driving the inserting rod to overturn up and down; the insertion plate extends inwards to the insertion rod.

Furthermore, the hooking block driving device comprises a hooking cylinder arranged on the tool changing moving frame; the hooking block is in an inverted L shape; one end of the hooking block is hinged to an output shaft of the hooking cylinder; an extension part matched with the hooking block horizontally extends out of the lower end of the overturning pressing knife.

Furthermore, the plug-in driving device comprises a tool changing screw rod arranged on the tool changing moving frame, a plug-in moving motor connected to one end of the tool changing screw rod and a sliding block arranged on the tool changing screw rod and capable of moving in the left-right direction; the sliding block is respectively in transmission connection with the inserted link and the inserted plate.

Furthermore, the inserted bar overturning device comprises a rotating shaft arranged on the tool changing moving frame, an inserted bar overturning motor connected to one end of the rotating shaft and an overturning connecting plate connected between the rotating shaft and the inserted bar; the turning pressing knife is arranged on the rotating shaft; the lower extreme of sliding block is connected with two and establishes with sliding from side to side the epaxial splint of pivot, just the upset connecting plate is located two between the splint.

Furthermore, the left tool changing mechanism and the right tool changing mechanism both comprise a fixed pressing tool which is fixed on the tool changing moving frame and positioned on the inner side of the turnover pressing tool.

As a specific embodiment, each of the left knife selecting mechanism and the right knife selecting mechanism comprises a plurality of knife selecting assemblies arranged on the mounting plate side by side, a knife selecting moving plate arranged on the mounting plate in a manner of moving left and right, a knife selecting fixed block arranged on the knife selecting moving plate and provided with a plurality of connecting holes side by side, and a knife selecting motor fixed on the mounting plate and used for driving the knife selecting moving plate to move left and right; each knife selecting assembly comprises a movable pressing knife which can be installed on the installation plate in a left-right moving mode and a knife selecting cylinder which is installed at the top of the movable pressing knife and matched with the connection hole; the output shaft of the cutter selecting cylinder can extend forwards and backwards, and the output shaft of each cutter selecting cylinder can be correspondingly inserted into the connecting hole, so that the cutter selecting cylinder is connected with the cutter selecting fixing block.

Furthermore, a rack extending along the left-right direction is arranged on the knife selecting moving plate, and a gear meshed with the rack is mounted on an output shaft of the knife selecting motor.

The utility model has the advantages that:

the utility model has the advantages of reasonable structure, compact structure, convenient use, stable use and the like; the size of the cutter can be adjusted according to the size of the plate, so that the pressing area of the cutter pressed on the plate is more consistent with the top surface of the plate, the pressing effect is better, and the cutter pressing device is suitable for plates with different sizes; meanwhile, due to the fact that the central pressing knife, the overturning pressing knife, the fixed pressing knife, the movable pressing knife and other cutters are arranged, the cutters can be tightly pressed at all positions of the plate, the plate is not prone to loosening, and the pressing effect is further improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partial structural diagram of the first embodiment of the present invention;

FIG. 3 is a schematic view of a partial structure of the present invention;

fig. 4 is a schematic view of a partial structure of the present invention;

fig. 5 is a schematic structural view of the turning press knife of the present invention;

fig. 6 is a schematic view of a partial structure of the present invention;

FIG. 7 is an enlarged view taken at A in FIG. 6;

fig. 8 is a schematic structural view of the present invention in use.

Reference numerals:

1. a plate feeding mechanism; 2. a hold-down mechanism; 20. pressing the base; 21. mounting a plate; 22. mounting a panel drive; 221. the mounting plate drives the motor; 222. mounting a plate link assembly; 223. a fixing plate; 224. a fulcrum shaft; 23. a central pressing knife; 24. a center press blade driving device; 25. a left tool changing mechanism and a right tool changing mechanism; 251. a tool changing moving frame; 252. a tool changing driving cylinder; 253. turning over the press knife; 2531. perforating; 2532. a slot; 2533. an extension portion; 254. a hooking block; 255. a hooking block driving device; 2551. hooking the air cylinder tightly; 256. inserting a rod; 257. inserting plates; 258. fixing a pressing knife; 259. a tool changing screw rod; 260. a plug-in moving motor; 261. a slider; 262. a rotating shaft; 263. an inserted bar overturning motor; 264. turning over the connecting plate; 265. a splint; 27. the left knife selecting mechanism and the right knife selecting mechanism; 271. selecting a knife moving plate; 272. a rack; 273. selecting a cutter fixing block; 274. a knife selecting motor; 2741. a gear; 275. moving a pressing knife; 276. a cutter selecting cylinder; 3. a bending mechanism.

Detailed Description

The invention will be further elucidated with reference to the drawings and the embodiments, which are exemplary only and do not limit the scope of the invention.

As shown in fig. 1 to 8, a pressing mechanism 2 of a bending machine is provided to bend a plate material by cooperating with a plate feeding mechanism 1 and a bending mechanism 3. The pressing mechanism 2 comprises a pressing base 20, a mounting plate 21 located above the pressing base 20, a mounting plate driving device 22 driving the mounting plate 21 to move up and down, a center pressing knife 23, a center pressing knife driving device 24 arranged on the mounting plate 21 and used for driving the center pressing knife 23 to move up and down, a left knife changing mechanism 25 and a right knife changing mechanism 25 which are respectively arranged on the mounting plate 21 and located on the left side and the right side of the center pressing knife 23, and a left knife selecting mechanism 27 and a right knife selecting mechanism 27 which are respectively arranged on the mounting plate 21 and located on the left side and the right side of the left knife changing mechanism 25 and the right knife changing mechanism 25. Hold-down mechanism 2 is used for compressing tightly each position on the horizontal direction to panel, it is not good to prevent to appear squinting and lead to bending the effect at the position of bending in-process panel, wherein, central sword 23 is used for compressing tightly the intermediate position of panel, stability is improved, and left tool changing mechanism 25, right tool changing mechanism 25, left side selects sword mechanism 27 and right side to select the setting of sword mechanism 27 then can cooperate the area that compresses tightly of adjustment cutter when compressing tightly panel, make the bottom surface area of cutter can more coincide with the surface area of panel, it is better to compress tightly the effect.

As shown in fig. 1, the mounting plate driving device 22 includes a mounting plate driving motor 221 fixedly disposed and a mounting plate connecting rod assembly 222 drivingly connected to the mounting plate driving motor 221 and having a lower end hinged to an upper end of the mounting plate 21. Through the above arrangement, the mounting plate driving motor 221 can drive the mounting plate 21 to move up and down through the mounting plate connecting rod assembly 222.

Specifically, as shown in fig. 1, the mounting plate driving motor 221 and the mounting plate connecting rod assembly 222 are both mounted on a fixed plate 223; the mounting plate driving motor 221 is driven by a fulcrum shaft 224 provided on the fixing plate 223 to the mounting plate link assembly 222. More specifically, the upper end of the mounting plate link assembly 222 is connected to the fulcrum shaft 224; the mounting plate driving motor 221 drives the fulcrum shaft 224 to rotate through a gear assembly, and the fulcrum shaft 224 drives the mounting plate 21 to move up and down through the mounting plate connecting rod assembly 222 when rotating, so that the parts mounted on the mounting plate 21 move along with the parts, and the mounting plate 21 is enabled to have a gap between the upper part of the pressing base 20 and the cutter when moving upwards, so that the plate can be conveniently inserted.

In order to make the mounting plate 21 more stable during movement, a slide rail assembly is further connected between the mounting plate 21 and the fixing plate 223, and of course, the slide rail assembly also has an effect of limiting the mounting plate 21, so as to prevent the mounting plate 21 from deviating from a preset stroke.

The central pressing knife driving device 24 comprises a central pressing knife motor, a central pressing knife screw rod and a central pressing knife slider, wherein the central pressing knife motor is fixedly arranged, the central pressing knife screw rod is vertically connected to the central pressing knife motor, the central pressing knife slider is vertically connected to the central pressing knife screw rod in a sliding mode, and the central pressing knife 23 is connected with the central pressing knife slider.

As shown in fig. 2 to 5, each of the left tool changer 25 and the right tool changer 25 includes a tool changing moving frame 251, a tool changing driving cylinder 252 fixed to the mounting plate 21 and driving the tool changing moving frame 251 to move left and right, a plurality of turning presser blades 253 which can be turned up and down and are mounted on the tool changing moving frame 251 side by side in the left-right direction, a hooking block 254 provided above the turning presser blades 253 and used for hooking the turning presser blades 253, a hooking block driving device 255 provided on the tool changing moving frame 251 and used for driving the hooking block 254 to turn back and forth, the tool changing device comprises an insertion rod 256 which can move left and right and can be inserted into a through hole 2531 of a plurality of turning press knives 253, an insertion plate 257 which can move left and right and can be inserted into a slot 2532 of the plurality of turning press knives 253, a plug-in driving device which is arranged on a tool changing moving frame 251 and is used for driving the insertion rod 256 and the insertion plate 257 to move left and right, and an insertion rod turning device which is arranged on the tool changing moving frame 251 and is used for driving the insertion rod 256 to turn up and down. Preferably, the insertion rod 256 and the insertion plate 257 are inserted into the through hole 2531 and the insertion groove 2532 from outside to inside, and the insertion plate 257 protrudes from the insertion rod 256 to inside, i.e., the insertion plate 257 is located closer to the inside than the insertion rod 256. In the present embodiment, the turning presser 253 in each of the left and right

tool changing mechanisms

25 and 25 is provided with six and the six turning pressers 253 are arranged side by side in the left-right direction. The left tool changing mechanism 25 and the right tool changing mechanism 25 can be used for adjusting the number of the turning pressing tools 253 required according to the actual size of the plate, for example, when the size of the plate is larger or smaller, because the size of the bottom surface of the turning pressing tools 253 is fixed, the turning pressing tools 253 can be more matched with the plate when pressing the plate by correspondingly increasing or decreasing the number of the turning pressing tools 253, if the number of the turning pressing tools 253 needs to be decreased, the part of the turning pressing tools 253 needing to be turned is driven by the inserting rod 256 to be turned upwards and hooked by the hooking block 254, when the number of the turning pressing tools needs to be increased, the turned turning pressing tools 253 only needs to be reset, therefore, the turning pressing tools 253 with different numbers can be more matched with the plate with different sizes through the matching of the left tool selecting mechanism 27 and the right tool selecting mechanism 27, and the pressing effect is better. When the overturning device is used, the inserting rod 256 and the inserting plate 257 are driven to move towards the overturning pressing knife 253 by the inserting-plate driving device, and because the inserting plate 257 is closer to the inner side than the inserting rod 256, when the inserting plate 257 is inserted into the slot 2532 of the part of the overturning pressing knife 253 which does not need to be overturned, the inserting rod 256 is just inserted into the through hole 2531 of the part of the overturning pressing knife 253 which needs to be overturned, then the inserting rod overturning device is used for driving the inserting rod 256 to overturn upwards to synchronously drive the corresponding overturning pressing knife 253 to overturn upwards, and then the hooking block 254 is driven by the hooking block driving device 255 to hook the overturning pressing knife 253 which overturns upwards so as to prevent the overturning pressing knife 253 from falling; similarly, when the turning presser 253 is needed to be added, only the locking block 254 needs to be reset, then the insertion rod turning device drives the insertion rod 256 to turn downwards to drive the corresponding turning presser 253 to turn downwards to reset, and then the insertion rod driving device drives the insertion rod 256 and the insertion plate 257 to move outwards.

As shown in fig. 3, the hooking block driving means 255 includes a hooking cylinder 2551 installed on the tool changing moving frame 251; the hooking block 254 is inverted L-shaped and has one end hinged to the output shaft of the hooking cylinder 2551, so that the output shaft of the hooking cylinder 2551 can drive the hooking block 254 to turn up and down when extending. And in order to let the hooking block 254 stably hook the turning presser 253, the lower end of the turning presser 253 horizontally extends an extension 2533 which is matched with the hooking block 253, when the hooking block 254 hooks the extension 2533 tightly, the turning presser 253 can be hooked tightly, and meanwhile, the extension 2533 can also increase the area of the bottom surface of the turning presser 253, so that the pressing effect is better.

As shown in fig. 4, the card driving means includes a cutter changing screw 259 mounted on the cutter changing moving frame 251, a card moving motor 260 connected to one end of the cutter changing screw 259, and a slide block 261 movably mounted on the cutter changing screw 259 in the left-right direction; the sliding block 261 is in transmission connection with the insertion rod 256 and the insertion plate 257 respectively. Specifically, the slide block 261 is connected to the insert plate 257 via a driving plate. Through the above arrangement, the insertion rod 256 and the insertion rod 257 can be conveniently driven to synchronously move. When the tool changing mechanism is used, the tool changing screw rod 259 is driven to rotate by the plug-in moving motor 206, and the sliding block 261 is driven to slide, so that the insertion rod 256 and the insertion rod 257 move synchronously, and the corresponding insertion into the through hole 2531 and the slot 2532 of the turning push knife 253 can be realized during the movement.

As shown in fig. 4, the plunger reversing device includes a rotating shaft 262 installed on the tool changing moving frame 251, a plunger reversing motor 263 connected to one end of the rotating shaft 262, and a reversing connection plate 264 connected between the rotating shaft 262 and the plunger 256; the turning pressing knives 253 are installed on the rotating shaft 262, and specifically, each turning pressing knife 253 is provided with an installation hole corresponding to the rotating shaft 262; the lower end of the sliding block 261 is connected with two clamping plates 265 which can slide left and right and are sleeved on the rotating shaft 262, and the turnover connecting plate 264 is positioned between the two clamping plates 265. Through the above arrangement, the insertion rod 256 can be conveniently driven to move and turn. When the device is used, the sliding block 261 is used for sliding to drive the two clamping plates 265 to move, and the overturning connecting plate 264 positioned between the two clamping plates 265 is pushed by the clamping plates 265 to cause synchronous movement, so that the effect of pushing the overturning connecting plate 264 and the inserted rod 256 is achieved; after the inserting plate 257 and the inserting rod 256 are correspondingly inserted into the turning pressing knife 253 which does not need to be turned and needs to be turned, the rotating shaft 262 is driven to rotate by the inserting rod turning motor 263, and the turning connecting plate 264 and the inserting rod 256 are driven to be turned upwards synchronously when the rotating shaft 262 rotates, so that the turning pressing knife 253 connected with the inserting rod 256 can be turned upwards until being hooked and fixed by the hooking block 254.

As shown in fig. 3 and 4, each of the left tool changer 25 and the right tool changer 25 further includes a fixed presser 258 fixed to the tool changing carriage 251 and located inside the turning presser 253. Through the arrangement, the left tool changing mechanism 25 and the right tool changing mechanism 25 can be guaranteed to be respectively provided with at least one tool for pressing the plate, and the situation that the tools are lost at the positions of the left tool changing mechanism 25 and the right tool changing mechanism 25 to influence the pressing of the plate is prevented. Preferably, the fixed press blade 258 is located adjacent to the central press blade 23.

As shown in fig. 2, 6 and 7, each of the left knife selecting mechanism 27 and the right knife selecting mechanism 27 includes a plurality of knife selecting assemblies arranged side by side on the mounting plate 21, a knife selecting moving plate 271 arranged on the mounting plate 21 in a manner of moving left and right, a knife selecting fixing block 273 arranged on the knife selecting moving plate 271 and provided with a plurality of connecting holes arranged side by side, and a knife selecting motor 274 fixed on the mounting plate 21 and used for driving the knife selecting moving plate 271 to move left and right; each knife selecting assembly comprises a movable pressing knife 275 which is installed on the installation plate 21 in a left-right moving mode and a knife selecting air cylinder 276 which is installed at the top of the movable pressing knife 275 and matched with the connection hole; the output shaft of the knife selecting cylinder 276 can extend forwards and backwards, and the output shaft of each knife selecting cylinder 276 can be correspondingly inserted into the connecting hole, so that the knife selecting cylinder 276 is connected with the knife selecting fixing block 273, and the knife selecting assembly can be synchronously driven to move when the knife selecting fixing block 273 moves along with the knife selecting moving plate 271. Preferably, the number of the connecting holes is correspondingly matched with the number of the knife selecting cylinders 276. Preferably, the moving press blade 275 is aligned, i.e., on the same horizontal line, with the flipping press blade 253 and the fixed press blade 258 so that the moving press blade 275 can be brought closer to the flipping press blade 253 by moving inboard so that the knives can be brought closer together and can be pressed into better conformity with the sheet material. The left blade selecting mechanism 27 and the right blade selecting mechanism 27 can be used for pressing two sides of a plate, the number of the movable pressing blades 275 can be adjusted according to the actual size of the plate, for example, when the size of the plate is larger or smaller, because the size of the bottom surface of the movable pressing blades 275 is fixed, the plate can be pressed by correspondingly increasing or decreasing the number of the movable pressing blades 275, so that different numbers of the movable pressing blades 275 can be more attached to the plates with different sizes through matching with the left blade changing mechanism 25, the right blade changing mechanism 25 and the central pressing blade 23, and the pressing effect is better. When the device is used, the knife selecting fixing block 273 is mounted on the knife selecting moving plate 271, so that when a knife selecting component needing to move outwards (namely needing to be reduced) is selected, the output shaft of the knife selecting cylinder 276 on the knife selecting component is directly inserted into the corresponding connecting hole in the knife selecting fixing block 273, and the knife selecting motor 274 drives the knife selecting moving plate 271 to move outwards, so that the effect of driving the knife selecting component to move outwards can be achieved, namely, the effect of reducing the number of the movable pressing knives 275 is achieved, if the number does not need to be reduced, the knife selecting component is not connected with the knife selecting fixing block 273, and the knife selecting component needing not to be removed cannot be driven when the knife selecting moving block 271 moves; the number of the cutter selecting assemblies which need to move outwards can be determined by the corresponding connection number of the cutter selecting air cylinders 276 and the cutter selecting fixing blocks 273, the use is convenient, generally speaking, the cutter selecting assemblies positioned on the outer side are preferentially selected, so that the movement of the cutter selecting assemblies is facilitated, and the cutter selecting assemblies positioned on the inner side cannot be influenced during the movement.

Preferably, as shown in fig. 7, a rack 272 extending in the left-right direction is provided on the knife selection moving plate 271, and a gear 2741 engaged with the rack 272 is installed on an output shaft of the knife selection motor 274, so that the rack 272 is conveniently driven to move when the gear 2741 rotates, and the knife selection moving plate 271 is synchronously driven to move. Through the arrangement, the knife selection motor 274 can conveniently drive the knife selection moving plate 271 to move, when in use, the knife selection motor 274 drives the gear 2741 to rotate, the rack 272 is synchronously moved, and the knife selection moving plate 271 also synchronously moves because the rack 272 is arranged on the knife selection moving plate 271.

As shown in fig. 7, in order to improve the stability of the knife selection moving plate 271 and the plurality of movable pressing knives 275, the knife selection moving plate 271 and the plurality of movable pressing knives 275 are respectively connected to the mounting plate 21 through a slide rail assembly, and the slide rail assembly can also prevent the knife selection moving plate 271 and the movable pressing knives 275 from deviating from a preset stroke.

In this embodiment, each of the left blade selecting mechanism 27 and the right blade selecting mechanism 27 includes eight blade selecting assemblies, and the eight blade selecting assemblies are arranged side by side in the left-right direction.

Preferably, as shown in fig. 1 and 2, the size of the bottom surface of the movable pressing blade 275 is larger than that of the bottom surface of the reversed pressing blade 253, so that it is more reasonable to set the number of the reversed pressing blades 253 and the movable pressing blades 275 according to the size of the plate material, and more specifically, the sizes of the bottom surfaces of the movable pressing blades 275 and the central pressing blade 23 are calculated preferentially to press the plate material, and when the sizes of the bottom surfaces of the central pressing blade 23 and the movable pressing blades 275 cannot be matched with the plate material, the compensation of the area of the bottom surface of the cutter is performed by the corresponding number of reversed pressing blades 253, so that the pressing areas of the three kinds of cutters, such as the central pressing blade 23, the reversed pressing blade 253 and the movable pressing blade 275, when pressing the plate material, are matched with the surface of the plate material more, and the pressing effect is better and more stable.

With reference to fig. 8, the following describes a specific usage principle of the present invention, so as to understand the present invention:

first, in use, the plate feeding mechanism 1 and the bending mechanism 2 are provided in front of and behind the pressing mechanism 2, respectively. After the sheet material is fed onto the top surface of the pressing base 20 by the sheet feeding mechanism 1, the system reads the specific dimensional parameters of the sheet material by detection. After reading, the central pressing tool driving device 24 drives the central pressing tool 23 to move down to a preset position, then the left tool changing mechanism 25 and the right tool changing mechanism 25 are started, the tool changing driving cylinder 252 drives the tool changing moving frame 251 to move inwards, and drives the overturning pressing tool 253 and the fixed pressing tool 258 to move inwards, namely to be close to the central pressing tool 23; then, the system determines the number of the turning press blades 253 which need to be turned upwards and the number of the moving press blades 175 which need to be moved outwards through calculation according to the read size data of the plate, namely, determines the number of the turning press blades 253 and the moving press blades 275 which need to be reduced; then, the card moving motor 260 starts and drives the sliding block 261, and drives the inserting plate 257 and the inserting rod 256 to move inward for a plurality of distances synchronously through the sliding block 261, wherein, during the moving process, the inserting plate 257 is inserted into the top slot 2532 of the part of the turning pressing blade 253 which does not need to be turned correspondingly to fix the turning pressing blades 253, the inserting rod 256 is inserted into the through hole 2531 of the part of the turning pressing blade 253 which needs to be turned correspondingly, then the inserting rod turning motor 263 is started to drive the rotating shaft 262 to rotate, when the rotating shaft 262 rotates, the turning connecting plate 264 and the inserting rod 256 connected with the turning connecting plate 264 are driven to turn upwards, the inserting rod 256 drives the inserted turning pressing blade 253 to turn synchronously, the turning pressing blade 253 stops when turning to the preset position, the hooking cylinder 25254 is started, the hooking block is driven to turn forwards and hook on the extending part 2533 of the turning pressing blade 253 which turns upwards, the fixing of the turning presser 253 is completed; then the left knife selecting mechanism 27 and the right knife selecting mechanism 27 are started, after each knife selecting air cylinder 276 is correspondingly inserted into the connecting hole of the knife selecting fixing block 273, the knife selecting motor 274 drives the knife selecting moving block 271 to move inwards through the meshing of the gear 2741 and the rack 272, namely the moving pressing knife 275 is moved to be close to the overturning pressing knife 253; then, the output shaft of the knife selecting cylinder 276 on the knife selecting assembly which is positioned at the inner side and does not need to move outwards contracts, so that the knife selecting cylinder 276 is separated from the knife selecting fixing block 273, then the knife selecting motor 274 is started to drive the knife selecting fixing block 273 to reset towards the outer side, and the part of the knife selecting assembly which needs to move outwards is also reset towards the outer side synchronously because the knife selecting fixing block 273 is connected with the knife selecting fixing block 273; after the resetting is completed, the mounting plate driving motor 221 drives the mounting plate 21 to move downwards through the mounting plate connecting rod assembly 222, synchronously drives the central pressing knife 23, the overturning pressing knife 253, the fixed pressing knife 258, the movable pressing knife 275 and other knives to move downwards until the knives are pressed on the plate, then the plate can be bent by the bending mechanism 3, and the mounting plate 21 is driven to move upwards after the bending is completed, so that the plate can be loosened; when the turning press blade 253 and the movable press blade 275 need to be added, the blade selecting cylinder 276 of the part of the blade selecting assembly which is not moved is connected with the blade selecting fixing block 273, then the blade selecting motor 274 drives the part of the blade selecting assembly to reset towards the outer side, then the turning press blade 253 can be reset, and the number of the turning press blade 253 and the number of the movable press blade 275 can be adjusted according to the situation after the turning press blade 253 is reset.

In summary, the utility model has the advantages of reasonable structure, compact structure, convenient use, stable use and the like; the size of the pressing cutter can be adjusted according to the size of the plate, so that the pressing area of the cutter pressed on the plate is more consistent with the top surface of the plate, the pressing effect is better, and the pressing cutter can be suitable for plates with different sizes; meanwhile, due to the arrangement of the central pressing knife 23, the overturning pressing knife 253, the fixed pressing knife 258, the movable pressing knife 275 and other knives, the knives can be pressed at various positions of the plate, so that the plate is not easy to loosen, and the pressing effect is improved.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. The utility model provides a hold-down mechanism of bender which characterized in that:

including pressing the base, being located pressing mounting panel, the drive of base top mounting panel drive arrangement, the center that the mounting panel reciprocated press the sword, set up and be in just be used for the drive on the mounting panel center that the center pressed the sword to reciprocate presses sword drive arrangement, sets up respectively on the mounting panel and be located the left tool changing mechanism and the right tool changing mechanism of the center left and right sides press sword, and set up respectively and be located on the mounting panel left side selection sword mechanism and the right side selection sword mechanism of the left side tool changing mechanism and the right side tool changing mechanism left and right sides respectively.

2. The clamping mechanism of a bending machine according to claim 1, characterized in that:

the mounting plate driving device comprises a mounting plate driving motor fixedly arranged and a mounting plate connecting rod assembly which is connected with the mounting plate driving motor in a transmission manner, and the lower end of the mounting plate connecting rod assembly is hinged to the upper end of the mounting plate.

3. The clamping mechanism of a bending machine according to claim 2, characterized in that:

the mounting plate driving motor and the mounting plate connecting rod assembly are both arranged on a fixed plate which is fixedly arranged; the mounting plate driving motor is in transmission with the mounting plate connecting rod assembly through a fulcrum shaft arranged on the fixing plate.

4. The clamping mechanism of a bending machine according to claim 1, characterized in that:

the left tool changing mechanism and the right tool changing mechanism respectively comprise a tool changing moving frame, a tool changing driving air cylinder which is fixed on the mounting plate and used for driving the tool changing moving frame to move left and right, a plurality of overturning pressing tools which can be overturned up and down and are arranged on the tool changing moving frame side by side along the left and right direction, a hooking block which is arranged above the overturning pressing tools and used for hooking the overturning pressing tools tightly, and a hooking block driving device which is arranged on the tool changing moving frame and used for driving the hooking block to overturn front and back, the device comprises an inserting rod which can move left and right and can be inserted into through holes of a plurality of turning pressing knives, an inserting plate which can move left and right and can be inserted into slots of the plurality of turning pressing knives, a plug-in driving device which is arranged on a tool changing moving frame and is used for driving the inserting rod and the inserting plate to move left and right, and an inserting rod turning device which is arranged on the tool changing moving frame and is used for driving the inserting rod to turn over up and down; the insertion plate extends inwards to the insertion rod.

5. The clamping mechanism of a bending machine according to claim 4, characterized in that:

the hooking block driving device comprises a hooking cylinder arranged on the tool changing moving frame; the hooking block is in an inverted L shape; one end of the hooking block is hinged to an output shaft of the hooking cylinder; an extension part matched with the hooking block horizontally extends out of the lower end of the overturning pressing knife.

6. The clamping mechanism of a bending machine according to claim 4, characterized in that:

the plug-in driving device comprises a tool changing screw rod arranged on the tool changing moving frame, a plug-in moving motor connected to one end of the tool changing screw rod and a sliding block arranged on the tool changing screw rod and capable of moving in the left-right direction; the sliding block is respectively in transmission connection with the inserted link and the inserted plate.

7. The clamping mechanism of a bending machine according to claim 6, characterized in that:

the inserted bar overturning device comprises a rotating shaft arranged on the tool changing moving frame, an inserted bar overturning motor connected to one end of the rotating shaft and an overturning connecting plate connected between the rotating shaft and the inserted bar; the turning pressing knife is arranged on the rotating shaft; the lower extreme of sliding block is connected with two and establishes with sliding from side to side the epaxial splint of pivot, just the upset connecting plate is located two between the splint.

8. The clamping mechanism of a bending machine according to claim 7, characterized in that:

the left tool changing mechanism and the right tool changing mechanism are both fixed on the tool changing moving frame and located on the inner side of the turnover pressing knife.

9. The clamping mechanism of a bending machine according to claim 1, characterized in that:

the left knife selecting mechanism and the right knife selecting mechanism respectively comprise a plurality of knife selecting assemblies arranged on the mounting plate side by side, a knife selecting moving plate arranged on the mounting plate in a left-right moving manner, a knife selecting fixed block arranged on the knife selecting moving plate and provided with a plurality of connecting holes side by side, and a knife selecting motor fixed on the mounting plate and used for driving the knife selecting moving plate to move left and right; each knife selecting assembly comprises a movable pressing knife which can be installed on the installation plate in a left-right moving mode and a knife selecting cylinder which is installed at the top of the movable pressing knife and matched with the connection hole; the output shaft of the cutter selecting cylinder can extend forwards and backwards, and the output shaft of each cutter selecting cylinder can be correspondingly inserted into the connecting hole, so that the cutter selecting cylinder is connected with the cutter selecting fixing block.

10. The clamping mechanism of a bending machine according to claim 9, characterized in that:

the knife selecting moving plate is provided with a rack extending along the left-right direction, and an output shaft of the knife selecting motor is provided with a gear meshed with the rack.