CN211437567U - Underdrive bending machine - Google Patents

Abstract

The utility model discloses a bottom drive bending machine, which comprises a mounting frame, a bottom block arranged on one side of the lower part of the mounting frame, a bending plate arranged above the bottom block and fixedly connected with one side of the upper part of the mounting frame, a rear stop finger mechanism arranged in the mounting frame and fixedly connected with the bottom block, and a lifting mechanism connected with the bottom block for driving the bottom block to be close to or far away from the bending plate; and a position detection mechanism connected with the lower sliding block is further arranged on one side of the mounting frame and used for detecting and positioning the lifting of the lower sliding block. The utility model realizes the detection and positioning of the lifting of the lower sliding block through the encoder and the synchronous belt, and has low cost, strong anti-interference capability and high positioning precision; meanwhile, the position of the rear stop finger module is adjusted by adopting a transmission mode of the transmission rod and the turbine box, the mechanism runs stably, and the rear stop finger module is high in positioning accuracy and strong in practicability.

Description

Underdrive bending machine

Technical Field

The utility model relates to a bender technical field especially relates to a underdrive bender.

Background

The bending machine is a device capable of bending material plates such as thin plates and steel plates, and is widely applied to the fields of aviation, railways, engineering machinery, electronics and other traditional manufacturing industries due to the universality of a forming die and the convenience of process operation.

The bending machine is divided into an upper transmission bending machine and a lower transmission bending machine according to the installation position of the sliding block, and the existing lower transmission bending machine has the following defects:

1) the grating is adopted to detect and position the lifting of the lower sliding block, and when the grating is adopted, the cost is higher, and the grating cannot be stained with oil due to the characteristics of the grating and the environmental suitability is poor;

2) the magnetic grid is adopted to detect and position the lifting of the lower sliding block, and when iron powder (residues such as iron powder and the like can be generated when the bending machine bends the plate) falls onto the magnetic grid, the magnetic grid is interfered, so that the detection precision is low, and certain potential safety hazards exist;

3) the rear gear mechanism mostly adopts an air cylinder, a motor and the like to realize transmission of a rear gear finger, is limited by the performance of the air cylinder, and has poor positioning precision, high bending cost and incapability of ensuring the bending precision of the material plate;

4) the rear gear finger mechanism is not provided with corresponding guide mechanisms such as guide rods, the rear gear finger cannot be accurately guided when being driven to perform translation and lifting movement, and the rear gear finger is complex in design, short in adjustable stroke and difficult to operate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lower transmission bending machine, which realizes the detection and the positioning of the lifting of a lower slider through an encoder and a synchronous belt, and has low cost, strong anti-interference capability and high positioning precision; meanwhile, the position of the rear catch finger module is adjusted by adopting a transmission mode of the transmission rod and the worm gear case, the mechanism runs stably, and the rear catch finger module is high in positioning precision and strong in practicability.

In order to realize the purpose, the following technical scheme is adopted:

a lower transmission bending machine comprises an installation frame, a lower sliding block arranged on one side of the lower portion of the installation frame, a bending plate arranged above the lower sliding block and fixedly connected with one side of the upper portion of the installation frame, a rear stop finger mechanism arranged in the installation frame and fixedly connected with the lower sliding block, and a lifting mechanism which is in driving connection with the lower sliding block and used for driving the lower sliding block to be close to or far away from the bending plate; and a position detection mechanism connected with the lower sliding block is further arranged on one side of the mounting frame and used for detecting and positioning the lifting of the lower sliding block.

Furthermore, the mounting rack comprises two mounting vertical plates which are arranged in parallel along the vertical direction at intervals and a mounting transverse plate arranged between the middle parts of the two mounting vertical plates; the lower sliding block and the bending plate are uniformly distributed on the outer sides of the two mounting vertical plates, and the rear baffle finger mechanism is arranged between the two mounting vertical plates.

Furthermore, the position detection mechanism is arranged on the outer side of an installation vertical plate and comprises two fixed seats and a detection seat; the two fixed seats are arranged at intervals in the vertical direction, and each fixed seat is also provided with a rotating shaft along the horizontal direction; one end of each rotating shaft is also provided with a synchronous wheel, and the two synchronous wheels are connected through a synchronous belt; the other end of one of the rotating shafts is also provided with an encoder, the detection seat is fixedly arranged on the inner side of the lower sliding block, and one end of the detection seat is fixedly connected with the synchronous belt.

Furthermore, the detection seat comprises a detection vertical plate fixedly arranged on the inner side of the lower sliding block and two detection transverse plates arranged along the horizontal direction and fixedly connected with the detection vertical plate; one side of hold-in range is located between two detection diaphragms, and two detect diaphragm one side and be equipped with a plurality of set screws, and set screws is used for fixing one side of hold-in range and two detection diaphragms locking.

Furthermore, the rear stop finger mechanism comprises a first translation module arranged perpendicular to the length direction of the lower slider, a first lifting module arranged perpendicular to the first translation module and connected with the top of the first translation module in a sliding manner, a first cross beam arranged perpendicular to the first lifting module and fixedly connected with one side of the first cross beam, a first sliding module arranged on the outer side of the first cross beam along the length direction of the first cross beam, and a plurality of rear stop finger modules connected with the first cross beam in a sliding manner through the first sliding modules; one end of the first translation module is fixedly connected with the upper part of the inner side of the lower sliding block, the lifting mechanism is arranged below the lower sliding block, and the lifting mechanism is used for driving the lower sliding block to drive the first translation module to do synchronous lifting motion.

Further, the first translation module comprises two first translation seats, a first transmission rod and a first motor; the two first translation seats are arranged in parallel at intervals in the length direction of the lower sliding block, and one ends of the two first translation seats are fixedly connected with the inner side of the lower sliding block; the other end of each first translation seat is also provided with a first worm gear set, and two ends of the first transmission rod are respectively in driving connection with the first worm gear set; each first translation seat is also internally provided with a first guide rod, a first screw rod assembly in driving connection with the first worm gear set and a first sliding seat which is sleeved outside the first guide rod and is in driving connection with the first screw rod assembly along the length direction of the first translation seat; the first motor is fixedly arranged at the bottom of a first worm gear set and is in driving connection with the first transmission rod through a transmission belt, and the first motor is used for driving the first transmission rod to drive the first sliding seat to slide along the first guide rod through the first worm gear set and the first lead screw assembly.

Furthermore, the first lifting module comprises two connecting seats, a second transmission rod and a second motor; each connecting seat is fixedly connected with a first sliding seat, and the top of each connecting seat is also provided with a second worm gear set; a bearing seat is respectively arranged at the outer side of each second worm gear set, and two ends of the inner side of the first cross beam are respectively fixedly connected with the second worm gear sets through the bearing seats; the second transmission rod is arranged between the two second worm gear sets, and one end of the second transmission rod penetrates through one second worm gear set and is in driving connection with the second motor; the top of each connecting seat is also provided with a second screw rod assembly and a second guide rod along the vertical direction, and a second worm gear assembly is sleeved outside the second guide rod and is in driving connection with the second screw rod assembly; the second motor is used for driving the second transmission rod to drive the second worm gear set and the first cross beam to lift along the second guide rod through the second screw rod assembly.

Furthermore, the cross section of the bearing seat is of an L-shaped structure, the L-shaped vertical end of the bearing seat is fixedly connected with the outer side of the second worm gear set, and the L-shaped transverse end of the bearing seat extends towards the outer side of the second worm gear set; the two ends of the bottom of the first cross beam are respectively placed at the top of the L-shaped transverse end of the bearing seat and are locked and fixed with the top of the L-shaped transverse end of the bearing seat and the outer side of the L-shaped vertical end of the bearing seat through a plurality of first screws.

Furthermore, each rear finger blocking module comprises a second sliding seat, an adjusting screw rod, a screw knob and a finger blocking block; the second sliding seat is connected with the first sliding module in a sliding mode, the adjusting seat is arranged on the outer side of the second sliding seat, and a first containing cavity penetrating from the top to the bottom is formed in the adjusting seat; the screw button is arranged in the first containing cavity and is rotationally connected with the adjusting seat, one end of the adjusting screw rod is inserted into the screw button and is in threaded connection with the screw button, and the other end of the adjusting screw rod penetrates out of one side of the adjusting seat; the stop finger block is hinged with one end of the adjusting screw rod penetrating out of the adjusting seat, and the screw button is used for adjusting the position of the stop finger block through the adjusting screw rod; the top of adjusting the seat still is equipped with the adjusting bolt, and the adjusting bolt is used for locking or not hard up adjusting screw.

Furthermore, the lifting mechanism comprises a plurality of lifting oil cylinders.

Adopt above-mentioned scheme, the beneficial effects of the utility model are that:

1) the lifting detection and positioning of the lower slider are realized through the encoder and the synchronous belt, the cost is low, the anti-interference capability is strong, and the positioning precision is high;

2) the position of the rear catch finger module is adjusted by adopting a transmission mode of a transmission rod and a worm gear box, the mechanism runs stably, and the practicability is high;

3) the first guide rod and the second guide rod can accurately guide the translation and the lifting of the rear finger module, so that the positioning accuracy of the rear finger module is improved;

4) the rear stop finger module has reasonable design, compact structure, adjustable stroke length and convenient operation and adjustment.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of FIG. 1 from another perspective;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a perspective view of the rear finger mechanism of the present invention;

FIG. 5 is a perspective view of the alternative view of FIG. 4 (with a portion of the housing of the first translation stage omitted);

FIG. 6 is an enlarged view of a portion of FIG. 5 at B;

fig. 7 is a perspective view of the rear finger module of the present invention;

wherein the figures identify the description:

1-a mounting frame; 2-lower slide block;

3, bending the plate; 4-rear catch finger mechanism;

5, a lifting mechanism; 6-position detection means;

11, installing a vertical plate; 12, mounting a transverse plate;

41-a first translation module; 42-a first lifting module;

43 — a first beam; 44-a first sliding module;

45-rear catch finger module; 61-a fixed seat;

62-detection seat; 63-a rotating shaft;

64-a synchronizing wheel; 65-synchronous belt;

66-an encoder; 411 — first translation stage;

412 — a first transfer lever; 413 — a first motor;

414 — a first worm gear set; 415 — a first guide bar;

416 — a first lead screw assembly; 417 — first sliding seat;

421-a connecting seat; 422-second driving rod;

423 — a second electric machine; 424 — second worm gear set;

425-a carrier; 426 — a second lead screw assembly;

427 — a second guide bar; 451-second sliding seat;

452-an adjustment seat; 453-adjusting screw;

454-a screw knob; 455-finger blocks;

456-adjusting the bolt.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 7, the utility model provides a bottom drive bending machine, which comprises a mounting frame 1, a lower slide block 2 arranged on one side of the lower part of the mounting frame 1, a bending plate 3 arranged above the lower slide block 2 and fixedly connected with one side of the upper part of the mounting frame 1, a rear stop finger mechanism 4 arranged in the mounting frame 1 and fixedly connected with the lower slide block 2, and a lifting mechanism 5 connected with the lower slide block 2 in a driving way and used for driving the lower slide block 2 to be close to or far away from the bending plate 3; the mounting bracket 1 is characterized in that one side of the mounting bracket is also provided with a position detection mechanism 6 connected with the lower sliding block 2, and the position detection mechanism 6 is used for detecting and positioning the lifting of the lower sliding block 2.

The mounting rack 1 comprises two mounting vertical plates 11 which are arranged in parallel along the vertical direction at intervals, and a mounting transverse plate 12 arranged between the middles of the two mounting vertical plates 11; the lower sliding block 2 and the bending plate 3 are uniformly distributed on the outer sides of the two mounting vertical plates 11, and the rear stop finger mechanism 4 is arranged between the two mounting vertical plates 11; the position detection mechanism 6 is arranged on the outer side of a mounting vertical plate 11, and the position detection mechanism 6 comprises two fixed seats 61 and a detection seat 62; the two fixed seats 61 are arranged at intervals in the vertical direction, and each fixed seat 61 is also provided with a rotating shaft 63 along the horizontal direction; one end of each rotating shaft 63 is also provided with a synchronous wheel 64, and the two synchronous wheels 64 are connected through a synchronous belt 65; the other end of one of the rotating shafts 63 is further provided with an encoder 66, the detection seat 62 is fixedly installed on the inner side of the lower sliding block 2, and one end of the detection seat 62 is fixedly connected with the synchronous belt 65; the detection seat 62 comprises a detection vertical plate fixedly arranged on the inner side of the lower sliding block 2 and two detection transverse plates arranged along the horizontal direction and fixedly connected with the detection vertical plate; one side of hold-in range 65 is located between two detection diaphragms, and two detection diaphragm one sides are equipped with a plurality of set screws, and set screws are used for locking one side of hold-in range 65 with two detection diaphragms fixedly.

The rear stop finger mechanism 4 comprises a first translation module 41 arranged perpendicular to the length direction of the lower slider 2, a first lifting module 42 arranged perpendicular to the first translation module 41 and connected with the top of the first translation module in a sliding manner, a first cross beam 43 arranged perpendicular to the first lifting module 42 and fixedly connected with one side of the first cross beam 43, a first sliding module 44 arranged on the outer side of the first cross beam 43 along the length direction of the first cross beam 43, and a plurality of rear stop finger modules 45 connected with the first cross beam 43 in a sliding manner through the first sliding module 44; one end of the first translation module 41 is fixedly connected with the upper part of the inner side of the lower slider 2, the lifting mechanism 5 is arranged below the lower slider 2, and the lifting mechanism 5 is used for driving the lower slider 2 to drive the first translation module 41 to do synchronous lifting motion; the first translation module 41 comprises two first translation seats 411, a first transmission rod 412 and a first motor 413; the two first translation seats 411 are arranged in parallel at intervals in the direction perpendicular to the length direction of the lower slider 2, and one ends of the two first translation seats 411 are fixedly connected with the inner side of the lower slider 2; a first worm gear 414 is further disposed at the other end of each first translation seat 411, and two ends of the first transmission rod 412 are respectively connected to the first worm gear 414 in a driving manner; each first translation seat 411 is further provided with a first guide rod 415, a first screw rod assembly 416 in driving connection with the first worm gear 414, and a first sliding seat 417 sleeved outside the first guide rod 415 and in driving connection with the first screw rod assembly 416 along the length direction thereof; the first motor 413 is fixedly installed at the bottom of a first worm gear 414 and is in driving connection with the first transmission rod 412 through a transmission belt, and the first motor 413 is used for driving the first transmission rod 412 to drive the first sliding seat 417 to slide along the first guide rod 415 through the first worm gear 414 and the first lead screw assembly 416.

The first lifting module 42 comprises two connecting seats 421, a second transmission rod 422 and a second motor 423; each connecting seat 421 is fixedly connected to a first sliding seat 417, and a second worm gear 424 (the second worm gear includes a worm gear case and a plurality of worm gears embedded in the worm gear case) is further disposed on the top of each connecting seat 421; a bearing seat 425 is respectively arranged at the outer side of each second worm gear group 424, and two ends of the inner side of the first cross beam 43 are respectively fixedly connected with the second worm gear groups 424 through the bearing seats 425; the second transmission rod 422 is arranged between two second worm gear sets 424, and one end of the second transmission rod 422 passes through one second worm gear set 424 and is in driving connection with the second motor 423; the top of each connecting seat 421 is further provided with a second lead screw assembly 426 and a second guide rod 427 along the vertical direction, and the second worm gear 424 is sleeved outside the second guide rod 427 and is in driving connection with the second lead screw assembly 426; the second motor 423 is used for driving the second transmission rod 422 to drive the second worm gear 424 and the first beam 43 to ascend and descend along the second guide rod 427 through the second lead screw assembly 426; the cross section of the bearing seat 425 is of an L-shaped structure, the L-shaped vertical end of the bearing seat 425 is fixedly connected with the outer side of the second worm gear 424, and the L-shaped transverse end of the bearing seat 425 extends towards the outer side of the second worm gear 424; the two ends of the bottom of the first beam 43 are respectively placed on the top of the L-shaped transverse end of the bearing seat 425 and are locked and fixed with the top of the L-shaped transverse end of the bearing seat 425 and the outer side of the L-shaped vertical end of the bearing seat 425 through a plurality of first screws.

Each rear finger block module 45 comprises a second sliding seat 451, an adjusting seat 452, an adjusting screw 453, a screw button 454 and a finger block 455; the second sliding seat 451 is slidably connected with the first sliding module 44, the adjusting seat 452 is arranged outside the second sliding seat 451, and a first cavity penetrating from the top to the bottom is arranged in the adjusting seat 452; the screw knob 454 is arranged in the first cavity and is rotationally connected with the adjusting seat 452, one end of the adjusting screw 453 is inserted into the screw knob 454 and is in threaded connection with the screw knob 454, and the other end of the adjusting screw is arranged by penetrating out of one side of the adjusting seat 452; the finger blocking block 455 is hinged to one end of the adjusting screw 453, which penetrates out of the adjusting seat 452, and the screw button 454 is used for adjusting the position of the finger blocking block 455 through the adjusting screw 453; the top of the adjusting seat 452 is further provided with an adjusting bolt 456, and the adjusting bolt 456 is used for locking or loosening the adjusting screw 453; the lifting mechanism 5 comprises a plurality of lifting oil cylinders.

The utility model discloses the theory of operation:

as shown in fig. 1-3, mounting holes are formed in two ends of one side of the bending plate 3, a boss is arranged at a position corresponding to the mounting hole on one side of each mounting vertical plate 11, the mounting vertical plate 11 is inserted into the mounting hole of the bending plate 3 through the boss and is locked and fixed by a plurality of screws, so that the stability of connection between the bending plate 3 and the mounting vertical plate 11 is ensured; the lower sliding block 2 is arranged below the bending plate 3, and a certain gap is reserved between the lower sliding block 2 and the two mounting vertical plates 11, so that the lower sliding block 2 can be conveniently lifted; in the embodiment, the lifting mechanism 5 comprises three lifting oil cylinders which are respectively arranged at two ends and the middle part of the bottom of the lower sliding block 2, so that the stability of the lifting of the lower sliding block 2 can be improved; the inner side of the lower sliding block 2 is fixedly connected with one side of a synchronous belt 65 through two detection transverse plates, when the lower sliding block 2 is driven to lift by a lifting oil cylinder, the synchronous wheel 64 can be driven to rotate through the synchronous belt 65, the number of rotating circles of the synchronous wheel 64 can be recorded and transmitted to a background by an encoder 66, so that the lifting position of the lower sliding block 2 can be detected, meanwhile, the lifting distance of the lower sliding block 2 can be preset for the encoder 66 through the background, when the lower sliding block 2 is lifted to the preset distance, the oil cylinder is controlled to stop working, and further the lower sliding block 2 is accurately positioned, because the encoder 66 and the synchronous belt 65 are adopted to record the lifting distance of the sliding block 2, the influence (such as residues and oil) of the external environment can be avoided, the environment adaptability is strong, the anti-interference capacity is; meanwhile, when the synchronous belt 65 and the two detection transverse plates are loosened, the fixing screws on the two detection transverse plates can be locked through the fixing screws, and the device is simple and practical.

As shown in fig. 4-7, one end of each of two first translation seats 411 of the first translation module 41 is fixedly connected to the upper portion of the inner side of the lower slider 2, the lower slider 2 is driven by the lift cylinder to drive the first translation module 41 to perform synchronous lifting motion, when the device works, a plate is placed on the top of the lower slider 2, and one end of the plate is pushed against a finger block 455 of the finger block 45, so as to position the plate, after the positioning is completed, the lift cylinder drives the lower slider 2 to drive the first translation module 41 and the finger block 45 to synchronously lift up, so as to push the plate to the bottom of the bending plate 3, thereby bending the plate; when the position of the rear finger module 45 in the horizontal direction needs to be adjusted, the first motor 413 can drive the first transmission rod 412 to slide along the first guide rod 415 through the first worm gear set 414 (the first worm gear set 414 includes a worm gear box and a plurality of worm gears built in the worm gear box), the first lead screw assembly 416 drives the first sliding seat 417, the first cross beam 43 and the rear finger module, and the adjustment of the position of the rear finger module 45 can be realized by only one motor by adopting the transmission mode of the first transmission rod 412 and the first worm gear set 414, so that the cost is low, the operation is stable, and meanwhile, the first guide rod 415 is arranged to accurately guide the first sliding seat 417, so that the positioning accuracy of the rear finger module 45 is improved; the cross section of the connecting seat 421 of the first lifting module 42 is in a door-shaped structure, the door-shaped cross end of the connecting seat 421 is located above the first translation seat 411, and two door-shaped vertical ends of the connecting seat 421 are fixedly connected with two sides of the first sliding seat 417 respectively, so that on one hand, the stability of the connection between the connecting seat 421 and the first sliding seat 417 can be improved, and on the other hand, the compactness of the mechanism can be enhanced; the second screw assembly 426 and the second guide rod 427 are both arranged at the top of the connecting seat 421 along the vertical direction, the second worm gear 424 is sleeved outside the second guide rod 427 and is in driving connection with the second screw assembly 426, and when the connecting device works, the second motor 423 can drive the second transmission rod 422 to drive the second worm gear 424, the first beam 43 and the rear finger module 45 to ascend and descend along the second guide rod 427 through the second screw assembly 426, so as to adjust the height of the rear finger module 45.

The bearing seat 425 is of an L-shaped structure, and the two ends of the bottom of the first cross beam 43 are respectively placed at the top of the L-shaped transverse end of the bearing seat 425, so that the connection stability of the first cross beam 43 and the bearing seat 425 can be improved; the first sliding module 44 is arranged at the outer side of the first beam 43, and the first sliding module 44 includes a first sliding rail and a plurality of first sliding blocks arranged on the first sliding rail; the second sliding seat 451 of each rear finger module 45 is fixedly connected with a first sliding block; the adjusting seat 452 is internally provided with a first cavity penetrating from the top to the bottom, that is, the top and the bottom of the adjusting seat 452 are provided with openings, the screw button 454 is arranged in the first cavity, and the screw button 454 protrudes and extends outwards through the openings, so that a worker can conveniently rotate the screw button 454 (because the two openings are respectively arranged at the top and the bottom of the adjusting seat 45242, the palm of the worker only needs to be positioned at one side of the adjusting seat 452 and the finger blocking block 455, the operation is convenient, the stroke length can be adjusted, time and labor are saved, and meanwhile, the adjusting bolt 456 can be used for locking or loosening the adjusting screw rod 453 so as to fix or adjust the finger blocking block 455.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The underdrive bending machine is characterized by comprising an installation frame, a lower sliding block arranged on one side of the lower portion of the installation frame, a bending plate arranged above the lower sliding block and fixedly connected with one side of the upper portion of the installation frame, a rear stop finger mechanism arranged in the installation frame and fixedly connected with the lower sliding block, and a lifting mechanism which is in driving connection with the lower sliding block and used for driving the lower sliding block to be close to or far away from the bending plate; and a position detection mechanism connected with the lower sliding block is further arranged on one side of the mounting frame and used for detecting and positioning the lifting of the lower sliding block.

2. The underdrive bending machine according to claim 1, wherein the mounting frame comprises two mounting risers spaced apart in parallel in a vertical direction, and a mounting cross plate disposed between the middle portions of the two mounting risers; the lower sliding block and the bending plate are uniformly distributed on the outer sides of the two mounting vertical plates, and the rear baffle finger mechanism is arranged between the two mounting vertical plates.

3. The underdrive bending machine according to claim 2, wherein the position detection mechanism is disposed outside a mounting riser, the position detection mechanism comprising two fixed seats, a detection seat; the two fixed seats are arranged at intervals in the vertical direction, and each fixed seat is also provided with a rotating shaft along the horizontal direction; one end of each rotating shaft is also provided with a synchronous wheel, and the two synchronous wheels are connected through a synchronous belt; the other end of one of the rotating shafts is also provided with an encoder, the detection seat is fixedly arranged on the inner side of the lower sliding block, and one end of the detection seat is fixedly connected with the synchronous belt.

4. The underdrive bending machine according to claim 3, wherein the detection seat comprises a detection vertical plate fixedly mounted on the inner side of the lower slider, and two detection transverse plates arranged in the horizontal direction and fixedly connected with the detection vertical plate; one side of hold-in range is located between two detection diaphragms, and two detect diaphragm one side and be equipped with a plurality of set screws, and set screws is used for fixing one side of hold-in range and two detection diaphragms locking.

5. The underdrive bending machine according to claim 2, wherein the backstop finger mechanism comprises a first translation module arranged perpendicular to the length direction of the lower slider, a first lifting module arranged perpendicular to the first translation module and slidably connected to the top of the first translation module, a first beam arranged perpendicular to the first lifting module and fixedly connected to one side of the first beam, a first slide module arranged outside the first beam along the length direction of the first beam, and a plurality of backstop finger modules slidably connected to the first beam via the first slide module; one end of the first translation module is fixedly connected with the upper part of the inner side of the lower sliding block, the lifting mechanism is arranged below the lower sliding block, and the lifting mechanism is used for driving the lower sliding block to drive the first translation module to do synchronous lifting motion.

6. A bottom drive bending machine according to claim 5, wherein said first translation module comprises two first translation seats, a first drive rod, a first motor; the two first translation seats are arranged in parallel at intervals in the length direction of the lower sliding block, and one ends of the two first translation seats are fixedly connected with the inner side of the lower sliding block; the other end of each first translation seat is also provided with a first worm gear set, and two ends of the first transmission rod are respectively in driving connection with the first worm gear set; each first translation seat is also internally provided with a first guide rod, a first screw rod assembly in driving connection with the first worm gear set and a first sliding seat which is sleeved outside the first guide rod and is in driving connection with the first screw rod assembly along the length direction of the first translation seat; the first motor is fixedly arranged at the bottom of a first worm gear set and is in driving connection with the first transmission rod through a transmission belt, and the first motor is used for driving the first transmission rod to drive the first sliding seat to slide along the first guide rod through the first worm gear set and the first lead screw assembly.

7. The underdrive bending machine according to claim 6, wherein the first lifting module comprises two connecting seats, a second transmission rod, a second motor; each connecting seat is fixedly connected with a first sliding seat, and the top of each connecting seat is also provided with a second worm gear set; a bearing seat is respectively arranged at the outer side of each second worm gear set, and two ends of the inner side of the first cross beam are respectively fixedly connected with the second worm gear sets through the bearing seats; the second transmission rod is arranged between the two second worm gear sets, and one end of the second transmission rod penetrates through one second worm gear set and is in driving connection with the second motor; the top of each connecting seat is also provided with a second screw rod assembly and a second guide rod along the vertical direction, and a second worm gear assembly is sleeved outside the second guide rod and is in driving connection with the second screw rod assembly; the second motor is used for driving the second transmission rod to drive the second worm gear set and the first cross beam to lift along the second guide rod through the second screw rod assembly.

8. The underdrive bending machine according to claim 7, wherein the cross section of the bearing seat is of an L-shaped structure, the L-shaped vertical end of the bearing seat is fixedly connected with the outer side of the second worm gear set, and the L-shaped transverse end of the bearing seat extends towards the outer side of the second worm gear set; the two ends of the bottom of the first cross beam are respectively placed at the top of the L-shaped transverse end of the bearing seat and are locked and fixed with the top of the L-shaped transverse end of the bearing seat and the outer side of the L-shaped vertical end of the bearing seat through a plurality of first screws.

9. The underdrive bending machine according to claim 8, wherein each set of backstop fingers comprises a second sliding seat, an adjustment screw, a screw knob, a backstop finger block; the second sliding seat is connected with the first sliding module in a sliding mode, the adjusting seat is arranged on the outer side of the second sliding seat, and a first containing cavity penetrating from the top to the bottom is formed in the adjusting seat; the screw button is arranged in the first containing cavity and is rotationally connected with the adjusting seat, one end of the adjusting screw rod is inserted into the screw button and is in threaded connection with the screw button, and the other end of the adjusting screw rod penetrates out of one side of the adjusting seat; the stop finger block is hinged with one end of the adjusting screw rod penetrating out of the adjusting seat, and the screw button is used for adjusting the position of the stop finger block through the adjusting screw rod; the top of adjusting the seat still is equipped with the adjusting bolt, and the adjusting bolt is used for locking or not hard up adjusting screw.

10. The underdrive bending machine according to claim 5, wherein said lifting mechanism comprises a plurality of lift cylinders.

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