CN213856736U - Bender and back dam device thereof - Google Patents

Abstract

The utility model belongs to the technical field of forging equipment, and relates to a bending machine and a rear material blocking device thereof, wherein the bending machine comprises a first motion component, a second motion component and a lifting component; the first motion assembly comprises a first guide piece, a first sliding piece and a driving assembly; the first sliding part is sleeved on the first guide part, can slide in a reciprocating manner under the driving of the driving assembly, and can be in a suspension state relative to the first guide part during sliding; the second motion assembly comprises a second guide and a second slide; the second guide piece is arranged on the first sliding piece, the second sliding piece is sleeved on the second guide piece to slide in a reciprocating mode, and the second sliding piece can be in a suspension state relative to the second guide piece during sliding; the lifting assembly is arranged at the top end of the second sliding part and used for clamping the workpiece to be bent and can drive the workpiece to be bent to vertically lift. The technical scheme provided by the bending machine and the rear material blocking device thereof can reduce the mutual friction force, avoid the condition of excessive abrasion and creeping during operation.

Description

Bender and back dam device thereof

Technical Field

The utility model relates to a forging and pressing equipment technical field especially relates to a bender and back dam device thereof.

Background

Bending belongs to one of forging and pressing machines, and is widely applied to light industry, aviation, shipbuilding, metallurgy, instruments, electrical appliances, stainless steel products, steel structure building and decoration industries. The bending machine is a preferred machine for performing sheet metal processing on a sheet material, particularly a large sheet material, and is mainly used for bending the sheet material to be bent in a solid state stretching mode under the condition of not using welding work, so that an air cylinder, a closed-loop component and a complex irregular part are produced. At present, the bending machine is widely applied at home and abroad, and has considerable development prospect.

The metal plate bending processing is an important link in a metal plate forming processing technology, and compared with a processing mode of removing materials such as metal cutting processing and the like, the metal plate bending processing has the advantages of saving raw materials and being high in efficiency, and at present, the metal plate bending processing is mainly performed by an operator by using a numerical control hydraulic bending machine. The bending machine mainly comprises a hydraulic cylinder, an upper die assembly, a lower die assembly, a workbench, a rack part and a rear material blocking device. Wherein, the back dam device occupies very main effect in whole panel bending process.

The rear material blocking device of the conventional bending machine has the problems of large friction resistance, high continuous operation abrasion and possible creeping phenomenon during low-speed movement.

Therefore, a novel rear material blocking device for a bending machine is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is big that aim at solves the rear stock stop of current bender existence frictional resistance, continuous operation wearing and tearing fast, produce the technical problem of the phenomenon of crawling easily when the low-speed operation to solve.

In order to solve the technical problem, an embodiment of the utility model provides a back dam device for bender has adopted following technical scheme:

this back dam device includes: the device comprises a first moving assembly, a second moving assembly and a lifting assembly;

the first motion assembly comprises a first guide, a first slide and a drive assembly; the first guide piece is arranged along a first direction, the first sliding piece is sleeved on the first guide piece, and the first sliding piece can slide back and forth along the first guide piece under the driving of the driving assembly and can be in a suspended state relative to the first guide piece during sliding;

the second motion assembly comprises a second guide and a second slide; the second guide piece is arranged on the first sliding piece along a second direction, wherein the first direction and the second direction are not parallel; the second sliding part is sleeved on the second guide part, can slide back and forth along the second guide part and can be in a suspended state relative to the second guide part when sliding;

the lifting assembly is arranged at the top end of the second sliding part and used for clamping a workpiece to be bent, and the lifting assembly can drive the workpiece to be bent to vertically lift.

In some embodiments, the first motion assembly further comprises a first locking member disposed on the first slider member and configured to lock the first slider member to the first guide member.

In some embodiments, the second motion assembly further comprises a second locking member disposed on the second slide, and the second locking member is capable of locking the second slide to the second guide.

In some embodiments, the lifting assembly comprises a fixing member, a lifting driving device and a striker plate, the lifting driving device is vertically arranged on the second sliding member through the fixing member, the striker plate is connected with an output end of the lifting driving device, and the striker plate is used for clamping a workpiece to be bent.

In some embodiments, the drive assembly comprises a mounting bracket, a lead screw, and a rotary drive; the screw rod and the first guide piece are arranged on the mounting frame side by side, and the first sliding piece is sleeved on the screw rod; the output end of the rotary driving device is connected with the screw rod, and the screw rod can be driven by the rotary driving device to rotate and can drive the first sliding piece to move linearly along the first direction in a reciprocating manner when rotating.

In some embodiments, the backstop device further comprises an inductive switch; and the induction switches are arranged on the mounting rack at the positions corresponding to the two target extreme displacements on the first guide piece.

In some embodiments, the mounting bracket comprises a mounting plate, a first fixing plate, and a second fixing plate; along first direction, first fixed plate with the second fixed plate set up respectively in the relative both ends of first guide, just first fixed plate with the second fixed plate passes through the mounting panel is connected.

In some embodiments, two first moving assemblies are provided, two first moving assemblies are arranged side by side along the second direction, and the first sliding members of the two first moving assemblies are respectively provided with two opposite ends of the second guide member and can synchronously slide back and forth along the first direction.

In some embodiments, there are two second sliding members, there are two corresponding lifting assemblies, and the second sliding members and the lifting assemblies correspond to each other one by one.

In order to solve the technical problem, the embodiment of the utility model provides a still provide a bender, adopt as follows technical scheme: the bending machine comprises a frame and the rear material blocking device; the rear material blocking device is fixedly connected with the rack through the driving assembly.

Compared with the prior art, the embodiment of the utility model provides a bender and back dam device thereof mainly has following beneficial effect:

this bender can make the work piece of waiting to bend and remove along first direction, second direction and vertical direction respectively through mutually supporting between first motion subassembly, second motion subassembly and the lifting unit to the work piece of waiting to bend accurately transports the operation of bending between the last lower module of bender. The first sliding part is in a suspension state when sliding relative to the first guide part so that the first sliding part and the first guide part can move relatively, the second sliding part is in a suspension state when sliding relative to the second guide part so that the second sliding part and the second guide part can move relatively without contact, so that mutual friction force is reduced, the phenomenon that the first sliding part and the second sliding part are abraded too fast in the continuous operation process is avoided, the first guide part and the first sliding part can be ensured, the difference value between the static friction factor and the dynamic friction factor between the second sliding part and the second sliding part is reduced, and the probability that the first sliding part and the second sliding part easily generate a crawling phenomenon when the first sliding part and the second sliding part operate at a low speed is reduced. In a word, this a back dam device for bender has no direct contact, frictional resistance is little and nearly invariable, operating temperature range is wide, environmental suitability is strong, the precision is high, long service life, application scenario are extensive and the advantage of facilitate promotion.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

fig. 1 is a schematic perspective view of a rear stopping device for a bending machine according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of the backstop device in fig. 1;

fig. 3 is a schematic perspective view of a partial structure of the backstop device in fig. 1;

fig. 4 is a schematic cross-sectional view of the backstop device in fig. 3.

The reference numbers in the drawings are as follows:

100. a rear material blocking device; 200. bending a workpiece;

1. a first motion assembly; 11. a drive assembly; 111. a mounting frame; 1111. mounting a plate; 1112. a first fixing plate; 1113. a second fixing plate; 112. a rotation driving device; 113. a screw rod; 12. a first slider; 121. a first sliding body; 1211. a first accommodating chamber; 1212. a fourth accommodating chamber; 122. a first housing; 1221. a first vent hole; 13. a first guide member; 14. a first locking member; 141. a third vent hole; 142. a third accommodating chamber; 143. an annular groove;

2. a second motion assembly; 21. a second slider; 22. a second guide member; 23. a second locking member;

3. a lifting assembly; 31. a fixing member; 32. a lift drive; 33. a striker plate; 4. an inductive switch.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the back stop device 100 is generally applied to a bending machine, and is mainly applied to a numerical control hydraulic bending machine, where the numerical control hydraulic bending machine generally includes a frame, and a hydraulic cylinder, an upper die assembly, a lower die assembly, a workbench, the frame, and the back stop device 100, which are connected to the frame. The rear material blocking device 100 is mainly used for conveying the workpiece 200 to be bent between the upper die assembly and the lower die assembly, and the upper die assembly and the lower die assembly are matched to perform bending operation on the workpiece 200 to be bent. In a word, this back dam device 100 for bender has no direct contact, frictional resistance is little and nearly invariable, operating temperature range is wide, environmental suitability is strong, the precision is high, long service life, simple structure, manufacturing is easy, the application scenario is extensive and the advantage of facilitate promotion.

An embodiment of the utility model provides a back stock stop 100 for bender, as shown in fig. 1 and fig. 2, this back stock stop 100 includes first motion subassembly 1, second motion subassembly 2 and lifting unit 3. The second motion assembly 2 is arranged on the first motion assembly 1 and can be driven to move by the first motion assembly 1; the lifting component 3 is arranged on the second moving component 2 and can be driven to move by the second moving component 2.

As shown in fig. 1, the first movement assembly 1 comprises a drive assembly 11, a first slide 12 and a first guide 13; the driving assembly 11 is detachably connected with the frame of the bending machine, so that the rear material blocking device 100 is installed on the frame of the bending machine, and the rear material blocking device and the bending machine can be specifically connected through bolts. The first guide part 13 is arranged along a first direction, the first sliding part 12 is sleeved on the first guide part 13, and the first sliding part 12 can slide back and forth along the first guide part 13 under the driving of the driving component 11 and can be in a suspension state relative to the first guide part 13 when sliding; specifically, the mutual friction force can be reduced by forming a gas film between the first slider 12 and the first guide 13 so that the two can perform relative movement without contact; of course, in other embodiments, the non-contact sliding may be formed by forming a hydraulic lubrication mode between the first slider 12 and the first guide 13, which is not particularly limited herein.

As shown in fig. 1, the second kinematic assembly 2 comprises a second slide 21 and a second guide 22; the second guide 22 is disposed on the first sliding member 12 along a second direction, wherein the first direction and the second direction are not parallel; the second sliding member 21 is sleeved on the second guiding member 22, and the second sliding member 21 can slide back and forth along the second guiding member 22 and can be in a suspended state relative to the second guiding member 22 when sliding; specifically, the mutual friction can be reduced by forming an air film between the second sliding member 21 and the second guide member 22 so that the two can move relatively without contact; of course, in other embodiments, the non-contact sliding may be formed by forming a hydraulic lubrication mode between the second slider 21 and the second guide 22, and is not particularly limited herein.

Specifically, in the present embodiment, the first direction is a longitudinal direction of the first guide 13, the second direction is a longitudinal direction of the second guide 22, and the first direction and the second direction are perpendicular to each other. The first motion assembly 1 drives the workpiece 200 to be bent to reciprocate in a first direction so as to drive the workpiece 200 to be bent to approach or be far away from an upper die assembly and a lower die assembly of the bending machine; the second moving assembly 2 drives the workpiece 200 to be bent to reciprocate in the second direction, so that the bending position of the workpiece 200 to be bent is finely adjusted to be opposite to the position between the upper die assembly and the lower die assembly of the bending machine, and the bending operation is facilitated. It should be further noted that, the sliding mode in the suspension state may be adopted in both the first direction and the second direction; the sliding mode in the floating state may be adopted in one of the first direction and the second direction, and is not particularly limited herein.

As shown in fig. 1 and 2, the lifting assembly 3 is disposed on the top end of the second sliding member 21, the lifting assembly 3 is configured to clamp the workpiece 200 to be bent, and the lifting assembly 3 can drive the workpiece 200 to be bent to vertically lift, so as to adjust the height position of the workpiece 200 to be bent relative to the upper and lower mold assemblies of the bending machine according to the thickness of the plate of the workpiece 200 to be bent.

It can be understood that the operation principle of the backstop device 100 for a bending machine is substantially as follows: according to the rear material blocking device 100, a workpiece 200 to be bent is arranged on the lifting assembly 3, when the workpiece 200 to be bent needs to be bent, the lifting assembly 3 drives the workpiece 200 to be bent to move in the vertical direction so as to adjust the position of the workpiece 200 to be bent in the vertical direction, the lifting assembly 3 is driven to slide along the second direction through the second sliding piece 21, so that the workpiece 200 to be bent is driven to move along the second direction, and the bending position of the workpiece 200 to be bent is finely adjusted to be right between an upper die assembly and a lower die assembly of a bending machine; the first sliding part 12 drives the second sliding part 21 to slide along the first direction, so as to drive the workpiece 200 to be bent to move along the first direction, and drive the workpiece 200 to be bent to be close to the upper and lower die assemblies of the bending machine to perform bending operation. Therefore, the first moving assembly 1, the second moving assembly 2 and the lifting assembly 3 are matched, so that the workpiece 200 to be bent can move along the first direction, the second direction and the vertical direction respectively, and the workpiece 200 to be bent can be moved to a position between the upper die assembly and the lower die assembly of the bending machine for bending operation.

Compared with the prior art, the rear material blocking device 100 for the bending machine at least has the following beneficial effects: this back dam device 100 can make the work piece 200 of waiting to bend move along first direction, second direction and vertical direction respectively through mutually supporting between first motion subassembly 1, second motion subassembly 2 and the lifting unit 3 to the work piece 200 of waiting to bend accurately transports the operation of bending between the last lower module of bender. Wherein, through the first slide 12 is in the suspension state when sliding relative to the first guide 13 so as to make between the first slide 12 and the first guide 13, and through the second slide 21 is in the suspension state when sliding relative to the second guide 22 so as to make between the second slide 21 and the second guide 22, all can realize relative motion under the condition of not contacting, thus reduce the mutual friction, avoid wearing and tearing too fast in the continuous operation process, still can ensure first guide 12 and first slide 13 at the same time, the difference between the static friction factor and the dynamic friction factor between the second guide 22 and the second slide 21 is all reduced, thus reduce the probability that the two are apt to produce the creeping phenomenon when running at low speed

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

In one embodiment, as shown in fig. 3 and 4, in particular, the first sliding member 12 includes a first sliding body 121 and a first shell 122 sleeved on the first sliding body 121, the first sliding body 121 has a first accommodating cavity 1211 extending therethrough; the first guiding element 13 is closely inserted into the first accommodating cavity 1211 of the first sliding element 12, and a first gap exists between the first guiding element 13 and the wall of the first accommodating cavity 1211 of the first sliding element 12; the first sliding body 121 is made of a porous material, and the first housing 122 is provided with a first vent 1221 communicating with the first accommodating chamber 1211. It is understood that a gas generating device is externally connected to the first ventilation hole 1221, and the gas generating device introduces gas into the first accommodating cavity 1211 through the first ventilation hole 1221, so that a gas film is formed between the first sliding body 121 and the first guiding member 13, and the two parts can move relatively without contact, thereby reducing mutual friction force. In addition, because the surface of the first sliding body 121 made of porous material is distributed with a great number of small holes, each small hole can play a throttling role, and therefore, the rigidity and the bearing capacity of the first sliding member 12 can be greatly improved under the condition of ensuring effective air supply.

In one embodiment, the first slider 12 and the second slider 21 are sliders having the same structure. Therefore, similarly, the second sliding member 21 includes a second sliding body (not shown) and a second housing (not shown) sleeved on the second sliding body, and the second sliding body has a second accommodating cavity (not shown) therethrough; the second guiding element 22 is closely inserted into the second accommodating cavity of the second sliding element 21, and a second gap exists between the second guiding element 22 and the cavity wall of the second accommodating cavity of the second sliding element 21; the second sliding body is made of porous materials, and a second ventilation hole communicated with the second accommodating cavity is formed in the second shell.

In one embodiment, as shown in fig. 1 and 2, the first moving assembly 1 further comprises a first locking member 14, the first locking member 14 is disposed on the first sliding member 12, the first locking member 14 and the first sliding member 12 can be connected by a bolt, and the first locking member 14 can lock the first sliding member 12 to the first guiding member 13. It can be understood that, after the first sliding part 12 of the first moving assembly 1 drives the workpiece 200 to be bent to move to the bending region of the upper and lower die assemblies of the bending machine, the first sliding part 12 is locked on the first guiding part 13 by the first locking part 14, so that the workpiece 200 to be bent can be prevented from being relatively displaced in the first direction during the bending process, and the bending effect can be prevented from being affected.

In one embodiment, as shown in fig. 1 and 2, the second moving assembly 2 further includes a second locking member 23, the second locking member 23 is disposed on the second sliding member 21, the second locking member 23 and the second sliding member 21 can be connected by bolts, and the second locking member 23 can lock the second sliding member 21 on the second guiding member 22. It can be understood that, after the second sliding part 21 of the second moving assembly 2 drives the bending portion of the workpiece 200 to be bent to align with the upper and lower die assemblies of the bending machine, the second sliding part 21 is locked on the second guiding part 22 through the second locking part 23, so that the workpiece 200 to be bent can be prevented from being relatively displaced in the second direction during the bending process, and the bending effect can be prevented from being affected.

In one embodiment, the first locking member 14 and the second locking member 23 are locking members having the same structure. As shown in fig. 3 and 4, each of the first locking member 14 and the second locking member 23 has a third receiving chamber 142 therethrough; the first guide part 13 is closely inserted into the third accommodating cavity 142 of the first locking part 14, and a third gap exists between the first guide part 13 and the cavity wall of the third accommodating cavity 142 of the first locking part 14; the second guiding element 22 is closely inserted into the third accommodating cavity 142 of the second locking element 23, and a fourth gap exists between the second guiding element 22 and the wall of the third accommodating cavity 142 of the second locking element 23; and the first locking member 14 and the second locking member 23 are respectively provided with a third vent hole 141 communicated with the third accommodating cavity 142.

As can be appreciated, the third vent 141 is externally connected to a vacuum generating device; taking the first locking member 14 as an example, when the first sliding member 12 needs to be locked to the first guiding member 13, the vacuum generating device vacuumizes the third accommodating cavity 142 through the third vent hole 141, and the cavity wall side of the first locking member 14 is tightly attached to the first guiding member 13 by the vacuum action, so that the first locking member 14 tightly embraces the first guiding member 13, thereby preventing the first sliding member 12 from further moving relative to the first guiding member 13; when the first sliding part 12 needs to be moved, the vacuum generating device is turned off, so that the cavity wall of the first locking part 14 can release the first guide part 13, the first sliding part 12 can be accurately locked, and the operation is simple and convenient.

In one embodiment, the third accommodating chamber 142 has at least one annular groove 143 formed on a wall thereof. It can be understood that, by forming the annular groove 143 on the cavity wall of the third accommodating cavity 142 of each of the first locking member 14 or the second locking member 23, the degree of holding of the first locking member 14 or the second locking member 23 to the corresponding first guide member 13 or the second guide member 22 in the locked state can be improved.

In one embodiment, as shown in fig. 1-3, the drive assembly 11 includes a mounting bracket 111, a rotary drive 112, and a lead screw 113; the first guide 13 and the lead screw 113 are disposed side by side on the mounting frame 111, specifically, the first guide 13 and the lead screw 113 may be disposed side by side on the mounting frame 111 along the second direction, or disposed side by side on the mounting frame 111 along the Z-axis direction, and the lead screw 113 is sleeved with the first sliding member 12. It should be noted that the mounting frame 111 is detachably connected to the frame of the bending machine, and the mounting frame and the frame may be specifically connected by bolts; along the extending direction of the first accommodating cavity 1211, the first sliding body 121 has a through fourth accommodating cavity 1212, and the screw 113 is inserted into the fourth accommodating cavity 1212 of the first sliding body 121.

In the embodiment, the first slide 12 is connected with the screw 113 through a bearing, so that the abrasion of the screw 113 during the relative movement with the first slide 12 can be reduced. The output end of the rotary driving device 112 is connected with the screw rod 113, the screw rod 113 can be driven by the rotary driving device 112 to rotate, specifically, the rotary driving device 112 can select a rotary motor, and the output end of the rotary driving device 112 is connected with one end of the screw rod 113 through a coupler, so as to drive the screw rod 113 to rotate. When the screw 113 rotates, the first sliding member 12 is driven to move linearly and reciprocally along a first direction, which is the length direction of the screw 113.

It can be understood that, the rotation driving device 112 and the lead screw 113 are matched to form a transmission structure, the rotation driving device 112 drives the lead screw 113 to rotate, and further drives the first sliding part 12 to reciprocate linearly along the direction of the lead screw 113, so as to drive the first sliding part 12 to slide reciprocally along the first guiding part 13, and drive the workpiece 200 to be bent to be close to or far away from the upper and lower die assemblies of the bending machine, and the transmission structure formed by matching the rotation driving device 112 and the lead screw 113 has the characteristics of simple structure, high transmission precision and high reaction speed.

In one embodiment, as shown in fig. 1, the second motion assembly 2 further includes a linear driving device (not shown), the linear driving device drives the second sliding member 21 to slide back and forth along the second guide 22, and the second sliding member 21 is in a floating state relative to the second guide 22 when sliding, so as to realize the automatic movement of the second sliding member 21 in the second guide 22. It should be noted that the driving principle of the linear driving device may be consistent with the driving principle of the driving assembly 11.

In one embodiment, as shown in fig. 1 and fig. 2, the lifting assembly 3 includes a fixing member 31, a lifting driving device 32, and a material blocking plate 33, the lifting driving device 32 is vertically disposed on the second sliding member 21 through the fixing member 31, specifically, in this embodiment, the fixing member 31 is a plate-shaped body, the fixing member 31 may be connected to the second sliding member 21 through a bolt, the material blocking plate 33 is connected to an output end of the lifting driving device 32, the material blocking plate 33 is driven by the lifting driving device 32 to move up and down in a vertical direction, the material blocking plate 33 is used for clamping the workpiece 200 to be bent, so that the workpiece 200 to be bent is driven to move up and down in the process of moving up and down of the material blocking plate 33, the height position between the upper die assembly and the lower die assembly of the bending machine of the workpiece 200 to be bent is adjusted according to the plate thickness of the workpiece 200 to be bent, thereby achieving an optimal bending position point.

In one embodiment, as shown in fig. 1, the lifting driving device 32 includes a lifting cylinder (not shown) and a cylinder fixing plate (not shown), the lifting cylinder is connected to the fixing member 31 through the cylinder fixing plate, and the cylinder fixing plate can be connected to the fixing member 31 through a bolt. Of course, in other embodiments, the lifting driving device 32 may be other suitable devices capable of lifting and lowering, and is not limited herein.

In one embodiment, as shown in fig. 1, the backstop device 100 further comprises an inductive switch 4; the inductive switch 4 is disposed on the mounting bracket 111 at a position corresponding to two target limit displacements on the first guide 13. It can be understood that, by providing the inductive switches 4 at both ends of the first guide 13, the inductive switches 4 are used for sensing that the first sliding member 12 performs a limit function when reaching a target limit position at both ends of the first guide 13.

In one embodiment, as shown in fig. 1, the back stop device 100 further includes a grating ruler (not shown), and the grating ruler is disposed on the mounting frame 111 along the first direction. It can be understood that, through the arrangement of the grating ruler, the full closed-loop precise positioning control of the first moving assembly 1 is realized, so that the relative position of the first sliding part 12 can be known in time.

In one embodiment, as shown in fig. 1, the mounting bracket 111 includes a mounting plate 1111, a first fixing plate 1112, and a second fixing plate 1113; along first direction, first fixed plate 1112 and second fixed plate 1113 set up respectively in the opposite ends of first guide 13, and first fixed plate 1112 and second fixed plate 1113 pass through mounting panel 1111 to be connected, and mounting panel 1111 is used for being connected with the frame of bender, and this back dam device 100 passes through mounting panel 1111 to be installed on the frame of bender promptly. It can be understood that the first fixing plate 1112, the second fixing plate 1113 and the mounting plate 1111 cooperate to jointly support the first guiding element 13 to support the smooth operation of the first sliding element 12, and further, the first fixing plate 1112 and the second fixing plate 1113 cooperate to jointly limit the first sliding element 12 when reaching the target limit position at the two ends of the first guiding element 13, so as to prevent the first sliding element 12 from sliding out of the first guiding element 13.

In one embodiment, as shown in fig. 1, two first moving assemblies 1 are provided, two first moving assemblies 1 are arranged side by side along the second direction, and the first sliding members 12 of the two first moving assemblies 1 are respectively provided with two opposite ends of the second guide 22 and can synchronously slide back and forth along the first direction. It can be understood that, by providing two first moving assemblies 1, specifically, the first sliding parts 12 of the two first moving assemblies 1 are disposed at two ends of the second guiding part 22 along the second direction, the two first sliding parts 12 cooperate to form a stable support for the second guiding part 22, so as to improve the structural stability and ensure that the second guiding part 22 is in a horizontal state.

In one embodiment, as shown in fig. 1, two second sliding members 21 are provided, two lifting assemblies 3 are correspondingly provided, and the second sliding members 21 and the lifting assemblies 3 are in one-to-one correspondence. It can be understood that, through setting up two lifting unit 3, two lifting unit 3 cooperations can be treated the work piece 200 of bending and form firm centre gripping and supporting role to make the work piece 200 of treating bending can smoothly bend, in addition, two second sliders 21 drive two corresponding lifting unit 3 and are close to each other or keep away from, can be according to the shape of the work piece 200 of treating bending or the distance of two lifting unit 3 of size adjustment, improve the commonality.

The specific process of the back stop device 100 for conveying the workpiece 200 to be bent to the upper and lower die assemblies of the bending machine in one embodiment will be briefly described as follows:

as shown in fig. 1 and fig. 2, after the workpiece 200 to be bent is fixed to the striker plate 33, the two first sliding members 12 are simultaneously inflated with air, so that an air film is generated between the first sliding members 12 and the corresponding first guiding members 13, and a frictionless sliding state is presented. The two second sliders 21 are arranged similarly. At this time, the rotary driving device 112 drives the screw 113 to rotate, so as to drive the first sliding part 12 to move forward along the first direction, when the front end of the workpiece 200 to be bent abuts against the bending machine, the rotary driving device 112 stops moving, and simultaneously the vacuum generator is opened, so that the first locking part 14 is locked on the first guiding part 13, and the locking and fixing of the first sliding part 12 are realized. The two second sliding parts 21 can change the positions of the two second sliding parts 21 along the second direction according to the size of the breadth of the workpiece 200 to be bent, and the second locking part 23 is adopted to lock the second guide part 22, so that the locking and fixing of the second sliding parts 21 are realized. Meanwhile, the position of the lifting cylinder can be adjusted according to the thickness of the workpiece 200 to be bent, so that the workpiece 200 to be bent reaches an optimal position point. When the action is completed, the vacuum is first removed, so that the first locking member 14 and the second locking member 23 disengage from the corresponding guide members and drive the corresponding slide members to move to the home position.

Based on foretell back stock stop 100, the embodiment of the utility model provides a still provide a bender (not shown), wherein, this bender includes frame (not shown) and foretell back stock stop 100, and wherein, back stock stop 100 passes through drive assembly 11 and frame fixed connection. Specifically, this bender still includes controlling means, and controlling means is connected with back dam device 100 electricity to dam device 100 realizes the automatic switch-over of three direction behind the automatic control, and degree of automation is high.

Compared with the prior art, the bending machine at least has the following beneficial effects: this bender can avoid wearing and tearing too fast in the continuous operation in-process through adopting foretell back dam device 100, reduces the condition of easily producing crawling when the low-speed operation. In a word, the bending machine has the advantages of no direct contact, small and approximately constant frictional resistance, wide working temperature range, strong environment adaptability, high precision, long service life, simple structure, easy manufacture, wide application occasions and convenient popularization.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a back dam device for bender which characterized in that, back dam device includes: the device comprises a first moving assembly, a second moving assembly and a lifting assembly;

the first motion assembly comprises a first guide, a first slide and a drive assembly; the first guide piece is arranged along a first direction, the first sliding piece is sleeved on the first guide piece, and the first sliding piece can slide back and forth along the first guide piece under the driving of the driving assembly and can be in a suspended state relative to the first guide piece during sliding;

the second motion assembly comprises a second guide and a second slide; the second guide piece is arranged on the first sliding piece along a second direction, wherein the first direction and the second direction are not parallel; the second sliding part is sleeved on the second guide part, can slide back and forth along the second guide part and can be in a suspended state relative to the second guide part when sliding;

the lifting assembly is arranged at the top end of the second sliding part and used for clamping a workpiece to be bent, and the lifting assembly can drive the workpiece to be bent to vertically lift.

2. The backstop device according to claim 1 wherein said first motion assembly further comprises a first locking member disposed on said first slide member and capable of locking said first slide member to said first guide member.

3. The backstop device of claim 1 wherein said second movement assembly further comprises a second retaining member, said second retaining member being disposed on said second slider, and said second retaining member being capable of retaining said second slider on said second guide.

4. The rear material blocking device according to claim 1, wherein the lifting assembly comprises a fixing piece, a lifting driving device and a material blocking plate, the lifting driving device is vertically arranged on the second sliding piece through the fixing piece, the material blocking plate is connected with an output end of the lifting driving device, and the material blocking plate is used for clamping a workpiece to be bent.

5. The backstop device according to any one of claims 1-4, characterized in that said drive assembly comprises a mounting frame, a lead screw and a rotary drive; the screw rod and the first guide piece are arranged on the mounting frame side by side, and the first sliding piece is sleeved on the screw rod; the output end of the rotary driving device is connected with the screw rod, and the screw rod can be driven by the rotary driving device to rotate and can drive the first sliding piece to move linearly along the first direction in a reciprocating manner when rotating.

6. The backstop device according to claim 5, characterized in that it further comprises an inductive switch; and the induction switches are arranged on the mounting rack at the positions corresponding to the two target extreme displacements on the first guide piece.

7. The backstop device according to claim 5 wherein said mounting bracket comprises a mounting plate, a first fixing plate and a second fixing plate; along first direction, first fixed plate with the second fixed plate set up respectively in the relative both ends of first guide, just first fixed plate with the second fixed plate passes through the mounting panel is connected.

8. The backstop device according to any one of claims 1-4, characterized in that there are two first moving assemblies, two first moving assemblies are arranged side by side along a second direction, and the first sliding members of the two first moving assemblies are respectively provided with two opposite ends of the second guide member and can synchronously slide back and forth along the first direction.

9. The backstop device according to any one of claims 1-4, characterized in that there are two second sliding members, there are two corresponding lifting assemblies, and the second sliding members and the lifting assemblies correspond one to one.

10. Bending machine, characterized in that it comprises a frame and a backstop device according to any one of claims 1 to 9;

the rear material blocking device is fixedly connected with the rack through the driving assembly.

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