阅读说明：本技术 一种弯曲机 (Bending machine ) 是由 张玉俏 董强 董永强 黄建超 王秀旗 李长军 于 2021-08-04 设计创作，主要内容包括：本发明涉及一种弯曲机,包括主架结构、滑台机构、液压油缸和成型模具；其中,所述主架结构包括平行设置的底板和顶板,所述滑台机构和所述液压油缸分别设于所述主架结构的底板和顶板上；所述成型模具包括设于所述液压油缸的伸缩杆上的凸模,以及设于所述滑台机构上的第一成型下模和第二成型下模,所述第一成型下模和第二成型下模用于放置待弯曲试样,所述第一成型下模与第二成型下模之间的跨距可通过所述滑台机构进行调节,所述液压油缸用于驱动所述凸模以对待弯曲试样进行弯曲。该弯曲机能够通过滑台机构自动调节两成型下模之间的跨距,操作方便,省时省力,且能够完成S型结构试样的弯曲加工,其结构简单紧凑,便于运输和自由摆放,适用性广。(The invention relates to a bending machine, which comprises a main frame structure, a sliding table mechanism, a hydraulic oil cylinder and a forming die, wherein the main frame structure comprises a main frame, a sliding table and a sliding table; the main frame structure comprises a bottom plate and a top plate which are arranged in parallel, and the sliding table mechanism and the hydraulic oil cylinder are respectively arranged on the bottom plate and the top plate of the main frame structure; the forming die comprises a male die arranged on a telescopic rod of the hydraulic oil cylinder, and a first forming lower die and a second forming lower die which are arranged on the sliding table mechanism, the first forming lower die and the second forming lower die are used for placing a sample to be bent, a span between the first forming lower die and the second forming lower die can be adjusted through the sliding table mechanism, and the hydraulic oil cylinder is used for driving the male die to bend the sample to be bent. This bending machine can be through the span between two shaping lower moulds of slip table mechanism automatically regulated, convenient operation, and labour saving and time saving, and can accomplish the bending process of S type structure sample, its simple structure is compact, be convenient for transport and freely put extensive applicability.)

1. A bending machine is characterized by comprising a main frame structure, a sliding table mechanism, a hydraulic oil cylinder and a forming die; wherein the content of the first and second substances,

the main frame structure comprises a bottom plate and a top plate which are arranged in parallel, and the sliding table mechanism and the hydraulic oil cylinder are respectively arranged on the bottom plate and the top plate of the main frame structure;

the forming die comprises a male die arranged on a telescopic rod of the hydraulic oil cylinder, and a first forming lower die and a second forming lower die which are arranged on the sliding table mechanism, the first forming lower die and the second forming lower die are used for placing a sample to be bent, a span between the first forming lower die and the second forming lower die can be adjusted through the sliding table mechanism, and the hydraulic oil cylinder is used for driving the male die to bend the sample to be bent.

2. The bending machine according to claim 1, wherein a groove is formed in the top of the first lower forming die.

3. The bending machine according to claim 2, wherein horizontally disposed support plates are provided in the grooves, the support plates being height-adjustably disposed in the grooves.

4. The bending machine according to claim 2, wherein a positioning mechanism is arranged at the top of the second lower molding die, the positioning mechanism comprises a positioning plate and a locking screw, the positioning plate is provided with a sliding groove, and the locking screw is used for penetrating through the sliding groove to fixedly connect the positioning plate to the second lower molding die.

5. The bending machine according to claim 1, wherein the slide table mechanism includes a base, a ball screw transmission mechanism, a drive mechanism, and two nut seats; wherein the content of the first and second substances,

the base is fixedly arranged on the bottom plate;

the ball screw transmission mechanism is arranged on the base and comprises a bidirectional ball screw, a left-handed screw nut, a right-handed screw nut and two screw support seats, the two screw support seats are fixedly arranged on the base, two ends of the bidirectional ball screw are respectively and rotatably connected to the two screw support seats, the left-handed screw nut is arranged on left-handed threads of the bidirectional ball screw, and the right-handed screw nut is arranged on right-handed threads of the bidirectional ball screw;

the driving mechanism is in transmission connection with the bidirectional ball screw and is used for driving the bidirectional ball screw to rotate;

the two nut seats are respectively and fixedly connected to the left-handed screw nut and the right-handed screw nut, and the first lower forming die and the second lower forming die are respectively and fixedly connected to the two nut seats.

6. The bending machine according to claim 5, wherein the slide table mechanism further comprises a guide rail, a slider, and a slider fixing plate; wherein the content of the first and second substances,

the number of the guide rails is two, the two guide rails are respectively and fixedly arranged on the base, the two guide rails are arranged at intervals and in parallel, and two sliding blocks are respectively arranged on each guide rail in a sliding manner;

the ball screw transmission mechanism is arranged between the two guide rails, and the two sliding blocks on each guide rail are respectively arranged corresponding to the two nut seats;

the number of the slide block fixing plates is two, the two slide block fixing plates are fixedly connected to the two nut seats respectively, and two ends of each slide block fixing plate are connected to the two slide blocks correspondingly arranged to the nut seats respectively;

and the first lower molding die and the second lower molding die are respectively and fixedly connected to the two slider fixing plates.

7. The bending machine according to claim 5, wherein the drive mechanism includes a stepping motor and a speed reducer, an output shaft of the stepping motor is connected to an input shaft of the speed reducer, and an output shaft of the speed reducer is connected to an input shaft of the bidirectional ball screw.

8. The bending machine according to claim 1, wherein a punch connecting plate is fixedly arranged at the end part of the telescopic rod of the hydraulic oil cylinder, and the punch is detachably connected to the punch connecting plate;

and one side of the hydraulic oil cylinder is also provided with a guide shaft, the guide shaft is connected to the top plate in a vertically slidable manner, and the lower end of the guide shaft is fixedly connected to the male die connecting plate.

9. The bending machine according to any one of claims 1-8, further comprising a safety shield assembly, a power distribution box assembly, and a hydraulic power plant; wherein the content of the first and second substances,

the safety protection cover assembly is detachably connected to the main frame structure, the distribution box assembly is detachably connected to the rear side of the main frame structure, and the hydraulic power device is adjustably arranged on one side of the main frame structure.

10. The bending machine according to claim 1, wherein a light curtain assembly is provided at a front side of the main frame structure.

Technical Field

The invention relates to the technical field of bending equipment, in particular to a bending machine.

Background

According to different production requirements, some samples or workpieces need to be manufactured into different bent shapes. There are manual crooked and the crooked dual mode of bending machine to the crooked processing of sample, manual crooked generally adopts simple instrument to bend the sample manually, high durability and convenient operation, and the machining tool is simple, but the sample is crooked nonstandard, and the precision is difficult to guarantee, current bending machine is put the sample on two anchor clamps of bending machine to the sample is crooked, bend the sample through the driving pressure head, but when the sample to different thickness is crooked, need the span of two anchor clamps of manual regulation, degree of automation is low, and the bending precision is low. In addition, the conventional bending machine can bend the sample into a U-shaped structure, but in the bending test of the intergranular corrosion sample, the sample needs to be bent into an S-shaped structure, and the conventional bending machine cannot complete the bending of the intergranular corrosion sample.

Disclosure of Invention

In view of the above, the present invention provides a bending machine, which aims to solve the problems in the prior art.

According to the invention, the bending machine comprises a main frame structure, a sliding table mechanism, a hydraulic oil cylinder and a forming die; wherein the content of the first and second substances,

the main frame structure comprises a bottom plate and a top plate which are arranged in parallel, and the sliding table mechanism and the hydraulic oil cylinder are respectively arranged on the bottom plate and the top plate of the main frame structure;

the forming die comprises a male die arranged on a telescopic rod of the hydraulic oil cylinder, and a first forming lower die and a second forming lower die which are arranged on the sliding table mechanism, the first forming lower die and the second forming lower die are used for placing a sample to be bent, a span between the first forming lower die and the second forming lower die can be adjusted through the sliding table mechanism, and the hydraulic oil cylinder is used for driving the male die to bend the sample to be bent.

Preferably, the top of the first lower molding die is provided with a groove.

Preferably, a horizontally arranged support plate is arranged in the groove, and the support plate is arranged in the groove in a height-adjustable mode.

Preferably, a positioning mechanism is arranged at the top of the second forming lower die and comprises a positioning plate and a locking screw, a sliding groove is formed in the positioning plate, and the locking screw penetrates through the sliding groove to fixedly connect the positioning plate to the second forming lower die.

Preferably, the sliding table mechanism comprises a base, a ball screw transmission mechanism, a driving mechanism and two nut seats; wherein the content of the first and second substances,

the base is fixedly arranged on the bottom plate;

the ball screw transmission mechanism is arranged on the base and comprises a bidirectional ball screw, a left-handed screw nut, a right-handed screw nut and two screw support seats, the two screw support seats are fixedly arranged on the base, two ends of the bidirectional ball screw are respectively and rotatably connected to the two screw support seats, the left-handed screw nut is arranged on left-handed threads of the bidirectional ball screw, and the right-handed screw nut is arranged on right-handed threads of the bidirectional ball screw;

the driving mechanism is in transmission connection with the bidirectional ball screw and is used for driving the bidirectional ball screw to rotate;

the two nut seats are respectively and fixedly connected to the left-handed screw nut and the right-handed screw nut, and the first lower forming die and the second lower forming die are respectively and fixedly connected to the two nut seats.

Preferably, the sliding table mechanism further comprises a guide rail, a sliding block and a sliding block fixing plate; wherein the content of the first and second substances,

the number of the guide rails is two, the two guide rails are respectively and fixedly arranged on the base, the two guide rails are arranged at intervals and in parallel, and two sliding blocks are respectively arranged on each guide rail in a sliding manner;

the ball screw transmission mechanism is arranged between the two guide rails, and the two sliding blocks on each guide rail are respectively arranged corresponding to the two nut seats;

the number of the slide block fixing plates is two, the two slide block fixing plates are fixedly connected to the two nut seats respectively, and two ends of each slide block fixing plate are connected to the two slide blocks correspondingly arranged to the nut seats respectively;

and the first lower molding die and the second lower molding die are respectively and fixedly connected to the two slider fixing plates.

Preferably, the driving mechanism comprises a stepping motor and a speed reducer, an output shaft of the stepping motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with an input shaft of the bidirectional ball screw.

Preferably, a male die connecting plate is fixedly arranged at the end part of a telescopic rod of the hydraulic oil cylinder, and the male die is detachably connected to the male die connecting plate;

and one side of the hydraulic oil cylinder is also provided with a guide shaft, the guide shaft is connected to the top plate in a vertically slidable manner, and the lower end of the guide shaft is fixedly connected to the male die connecting plate.

Preferably, the bender further comprises a safety shield assembly, a power distribution box assembly and a hydraulic power plant; wherein the content of the first and second substances,

the safety protection cover assembly is detachably connected to the main frame structure, the distribution box assembly is detachably connected to the rear side of the main frame structure, and the hydraulic power device is adjustably arranged on one side of the main frame structure.

Preferably, a light curtain assembly is arranged on the front side of the main frame structure.

According to the bending machine provided by the invention, the two lower forming dies are arranged on the sliding table through the sliding table mechanism, the span between the two lower forming dies can be quickly adjusted through the driving of the sliding table mechanism, manual adjustment is not needed, the operation is convenient, time and labor are saved, and the bending machine can bend samples with different thicknesses; meanwhile, the forming die of the bending machine completes bending processing of the sample with the S-shaped structure. The bending machine is simple and compact in structure, convenient to transport and freely put, and wide in applicability.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 shows a schematic perspective view of a bending machine according to an embodiment of the present invention.

Fig. 2 is a perspective view illustrating a main body part of a bending machine according to an embodiment of the present invention.

Fig. 3 shows a front view of a main body portion in a bending machine according to an embodiment of the present invention.

Fig. 4 is a diagram showing a state in a sample bending process in the bending machine according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a sample which is bent twice by the bending machine according to the embodiment of the present invention and becomes an S-shaped structure.

Fig. 6 is a schematic perspective view showing a slide table mechanism in a bending machine according to an embodiment of the present invention.

Fig. 7 shows a top view of a slide mechanism in a bending machine according to an embodiment of the present invention.

In the figure: the main frame structure 1, the bottom plate 11, the top plate 12, the pillar 13, the sliding table mechanism 2, the base 21, the guide rail 22, the slider 23, the bidirectional ball screw 241, the left-handed screw nut 242, the right-handed screw nut 243, the screw support 244, the nut seat 25, the speed reducer 26, the stepping motor 27, the slider fixing plate 28, the hydraulic cylinder 3, the cylinder 31, the telescopic rod 32, the punch connecting plate 33, the guide shaft 34, the first lower molding die 41, the groove 411, the through groove 412, the second lower molding die 42, the positioning plate 43, the locking screw 44, the support plate 45, the punch 5, the safety shield assembly 6, the hydraulic power device 7, the distribution box assembly 8, the sample 9 and the light curtain device 10.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

The invention provides a bending machine which comprises a main frame structure 1, a sliding table mechanism 2, a hydraulic oil cylinder 3 and a forming die. The main frame structure 1 comprises a bottom plate 11 and a top plate 12 which are arranged in parallel, and the sliding table mechanism 2 and the hydraulic oil cylinder 3 are respectively arranged on the bottom plate 11 and the top plate 12 of the main frame structure 1; the forming die comprises a male die 5 arranged on an expansion rod 32 of a hydraulic oil cylinder 3, a first forming lower die 41 and a second forming lower die 42 arranged on a sliding table mechanism 2, the first forming lower die 41 and the second forming lower die 42 are used for placing a sample to be bent, the span between the first forming lower die 41 and the second forming lower die 42 can be adjusted through the sliding table mechanism 2, and the hydraulic oil cylinder 3 is used for driving the male die 5 to bend the sample to be bent.

Specifically, as shown in fig. 2 and 3, in the present embodiment, the bottom plate 11 and the top plate 12 of the main frame structure 1 are rectangular plate-shaped structures with equal size, the bottom plate 11 and the top plate 12 are fixedly connected together by four support posts 13, and the four support posts 13 are disposed at four corner positions of the rectangular bottom plate 11 and the rectangular top plate 12. The hydraulic oil cylinder 3 comprises a cylinder 31 and an expansion link 32, the cylinder 31 is fixedly connected to the top plate 12, a through hole is formed in the top plate 12, and the expansion link 32 penetrates through the through hole and is arranged towards the bottom plate 11.

Further, a punch connecting plate 33 is fixedly arranged at the end part of the telescopic rod 32 of the hydraulic oil cylinder 3, and the punch 5 is detachably connected to the punch connecting plate 33. A guide shaft 34 is further arranged on one side of the hydraulic oil cylinder 3, the guide shaft 34 is connected to the top plate 12 in a vertically sliding mode, and the lower end of the guide shaft 34 is fixedly connected to the punch connecting plate 33. By arranging the punch connecting plate 33, the installation and the disassembly of the punch 5 can be facilitated, and the connection of the guide shaft 34 can be facilitated. The guide shaft 34 can guide the up-and-down movement of the male die 5, so that a limiting effect is achieved, the male die 5 is pressed down more smoothly and accurately to prevent dislocation, and meanwhile, the situation that the pressing rigidity of the male die 5 is insufficient only through the telescopic rod 32 of the hydraulic oil cylinder 3 is avoided.

Referring to fig. 1, the bender further includes a safety shield assembly 6, a distribution box assembly 8, and a hydraulic power plant 7. Wherein, the safety shield assembly 6 is detachably connected to the main frame structure 1, and the distribution box assembly 8 is detachably connected to the rear side of the main frame structure 1; the hydraulic power unit 7 is position-adjustably arranged on one side of the main frame structure 1.

Specifically, safety protection cover subassembly 6 detachably connects on body frame structure 1, can conveniently maintain the internal structure of bending machine, safety protection cover subassembly 6 is the protecting shield body that adopts the sheet steel to enclose, as shown in fig. 1, in this embodiment, safety protection cover subassembly 6 is including setting up the top protection casing that is used for protecting hydraulic cylinder 3 and accessory parts on roof 12, the bottom protection casing that is used for protecting slip table mechanism 2 on bottom plate 11, the lateral part protection casing that is used for protecting the part between roof 12 and roof 12 between roof 12 and bottom plate 11, in this embodiment, the rear side and the left and right both sides of body frame structure 1 set up the protection casing, the front side of body frame structure 1 is open structure, be used for putting into and taking out the sample through the front side opening. The hydraulic power device 7 comprises a hydraulic oil tank, a hydraulic pump and the like and is used for providing hydraulic power energy for the hydraulic oil cylinder 3 of the bending machine, in the embodiment, the hydraulic power device 7 is arranged on one side of the support structure independently, the weight of the main frame structure 1 is reduced, the bottom of the hydraulic power device 7 is provided with the idler wheels, the hydraulic power device 7 can be conveniently moved, the arrangement position is free, and the hydraulic power device 7 is connected with the hydraulic control valve and the hydraulic oil cylinder 3 through a hydraulic pipeline.

Referring to fig. 4 and 5, when the bending machine is used to bend an intercrystalline corrosion sample into an S-shaped structure, the bending is performed twice, first, a strip-shaped sample is placed on a first lower forming die 41 and a second lower forming die 42, the sample 9 is pressed down by a male die 5, one end of the sample 9 is bent into a U-shaped structure, and then, the other end of the sample 9 is bent in a reverse direction to form the U-shaped structure. However, when the sample 9 is bent for the second time after being bent for the first time, the bent portion protrudes from the main portion of the sample 9 and cannot be horizontally placed on the lower molding die, and for this reason, a recess 411 is formed at the top of the first lower molding die 41, and when the sample after being bent for the second time is bent for the first time, the bent portion at one end of the sample 9 is placed in the recess 411 of the first lower molding die 41, thereby ensuring that the main portion of the sample 9 is horizontally placed on the first lower molding die 41 and the second lower molding die 42. It should be noted that the distance from the outer side wall of the first lower molding die 41 adjacent to the second lower molding die 42 to the inner wall of the recess 411 should be smaller than the inner width of the U-shaped structure after the sample is bent for the second time, so that the bent portion of the first bending does not affect the second bending of the sample when the sample is bent for the second time.

Further, a horizontally disposed support plate 45 is provided in the recess 411 of the first molding lower die 41, and the support plate 45 is height-adjustably provided in the recess 411. One end of the sample is placed on the lower forming die after being bent for one time, and the sample is not easy to keep horizontal placement due to the large weight of the bent end, the supporting plate 45 is arranged in the groove 411 of the first lower forming die 41, the bent end of the sample can be supported through the supporting plate 45, the situation that the bent end cannot be placed horizontally due to the large weight of the bent end is avoided, the supporting plate 45 is arranged in the groove 411 in a height adjustable mode, and the supporting plate 45 can be adjusted to be at a proper height according to the size of the bent part of the sample so as to be suitable for various types of samples after being bent for one time. Specifically, in this embodiment, a through slot 412 transversely penetrating through the recess 411 is formed in the first lower molding die 41, a transversely opened threaded hole is formed in the support plate 45, and a screw is horizontally inserted through the through slot 412 and is in threaded connection with the threaded hole in the support plate 45, so that the support plate 45 is fixed on one side wall of the recess 411, and the size of the head portion of the screw is larger than the width of the through slot 412 so as to be clamped on the outer side wall of the first lower molding die 41.

Further, a positioning mechanism is arranged at the top of the second lower molding die 42, the positioning mechanism includes a positioning plate 43 and a locking screw 44, a sliding slot is arranged on the positioning plate 43, and the locking screw 44 is used for penetrating through the sliding slot to fixedly connect the positioning plate 43 to the second lower molding die 42. The positioning mechanism is provided for fast and accurate positioning when the sample is bent, and after the position of the center line of the bent portion of the sample is calculated, the position of the positioning plate 43 on the second lower molding die 42 is adjusted so that the distance from the positioning end surface of the positioning plate 43 to the center position between the two lower molding dies is equal to the distance from the center line of the bent portion of the sample to the end surface of the corresponding end of the sample. In this embodiment, the positioning plate 43 is a rectangular plate-shaped steel plate, two sliding grooves are formed in the positioning plate 43, the two sliding grooves are arranged in parallel at intervals, two threaded holes are correspondingly formed in the second molding lower die 42, and two locking screws 44 respectively penetrate through the two sliding grooves in the positioning plate 43 to be matched and connected with the two threaded holes in the second molding lower die 42, so that the positioning plate 43 is locked and fixed on the top surface of the second molding lower die 42. When the positioning plate 43 is adjusted, the locking screw 44 is loosened, and the positioning plate 43 is horizontally moved.

Referring to fig. 6 and 7, in the bending machine, the slide table mechanism 2 includes a base 21, a ball screw transmission mechanism, a drive mechanism, and two nut seats 25. Wherein, base 21 sets firmly on body frame structure 1's bottom plate 11, ball screw drive mechanism locates on base 21, ball screw drive mechanism includes two-way ball 241, levogyration screw nut 242, dextrorotation screw nut 243 and two screw supporting seats 244, and two screw supporting seats 244 set firmly on base 21, and two-way ball 241's both ends rotate respectively and connect on two screw supporting seats 244, and levogyration screw nut 242 sets up on two-way ball 241's levogyration screw thread, and dextrorotation screw nut 243 sets up on two-way ball 241's dextrorotation screw thread. The driving mechanism is in transmission connection with the bidirectional ball screw 241 and is used for driving the bidirectional ball screw 241 to rotate. The two nut seats 25 are respectively and fixedly connected to the left-handed screw nut 242 and the right-handed screw nut 243, the first lower molding die 41 and the second lower molding die 42 are respectively and fixedly connected to the two nut seats 25, and when the bidirectional ball screw 241 rotates, the left-handed screw nut 242 and the right-handed screw nut 243 are driven to move in opposite directions, and then the two nut seats 25 are driven to move in opposite directions, so that the first lower molding die 41 and the second lower molding die 42 move in opposite directions.

Further, the slide table mechanism 2 further includes a guide rail 22, a slider 23, and a slider fixing plate 28. The number of the guide rails 22 is two, the two guide rails 22 are respectively and fixedly arranged on the base 21, the two guide rails 22 are arranged in parallel at intervals, and two sliding blocks 23 are respectively arranged on each guide rail 22 in a sliding manner. The ball screw transmission mechanism is arranged between two guide rails 22, two sliding blocks 23 on each guide rail 22 are respectively arranged corresponding to two nut seats 25, and the axial direction of the bidirectional ball screw 241 is consistent with the extending direction of the guide rails 22. The number of the slider fixing plates 28 is two, the two slider fixing plates 28 are respectively and fixedly connected to the two nut seats 25, two ends of each slider fixing plate 28 are respectively connected to the two sliders 23 corresponding to the nut seats 25, and the first lower molding die 41 and the second lower molding die 42 are respectively and fixedly connected to the two slider fixing plates 28. After the slide block fixing plate 28 is fixed with the nut seat 25 and the slide block 23, the slide blocks 23 at the two ends of the slide block fixing plate 28 can support and guide the slide block fixing plate 28, so that the slide block fixing plate 28 can move along the extending direction of the guide rail 22; when the two nut seats 25 move in opposite directions, the two slide block fixing plates 28 are driven to move in opposite directions, and further the first lower molding die 41 and the second lower molding die 42 are driven to move in opposite directions, so that the span between the first lower molding die 41 and the second lower molding die 42 can be changed through the sliding table mechanism 2, and therefore, the test specimens with different thicknesses can be bent.

In this embodiment, the driving mechanism includes a stepping motor 27 and a speed reducer 26, an output shaft of the stepping motor 27 is connected to an input shaft of the speed reducer 26, and an output shaft of the speed reducer 26 is connected to an input shaft of the bidirectional ball screw 241. The stepping motor 27 has an effect of accurate angle rotation, and the stepping motor 27 is adopted to drive the bidirectional ball screw to rotate so as to drive the two nut seats 25 to move linearly, so that the positioning precision is high, accurate positioning can be realized, and finally, the span between the first lower molding die 41 and the second lower molding die 42 can be accurately controlled.

In order to guarantee the security of bender during operation, the front side of body frame structure 1 is equipped with light curtain subassembly 10, specifically, in this embodiment, fixedly connected with light curtain transmitter and light curtain receiver respectively on two pillars 13 of body frame structure 1 front side, when the bender is carrying out the during operation, in case there is the foreign object to enter the body frame structure 1 inner space through body frame structure 1 front side, the light between light curtain transmitter and the light curtain receiver will be cut off, light curtain subassembly 10 sends the shading signal to the controller of bender, controller control bender stop work, avoid taking place the incident.

In this embodiment, the electric control system of the bending machine is controlled by a PLC; the safety shield assembly 6 is provided with a touch screen panel, and the touch screen panel is provided with a visual interface so as to be convenient to control and operate; the bottom of the front side of the main frame structure 1 is provided with a bending operation start-stop button.

The bending process of bending the intergranular corrosion sample into the S-shaped structure by using the bending machine provided by the embodiment is as follows: firstly, measuring the thickness of a sample before bending, inputting the measured thickness into a touch screen, and controlling a stepping motor 27 to drive a speed reducer 26 so as to adjust the span between a first molding lower die 41 and a second molding lower die 42; then placing the strip-shaped sample to be bent on the first forming lower die 41 and the second forming lower die 42, and positioning the sample through a positioning mechanism on the second forming lower die 42; and finally, clicking a start button on the bending machine, automatically pressing down the male die 5 of the bending machine to a certain position according to a program set by the PLC, and then lifting, and completing one-time bending of the sample, namely bending one end of the sample into a U-shaped structure. Then, the span between the first molding lower die 41 and the second molding lower die 42 is increased, the primary bending sample clamped between the two molding lower dies is taken out, and the span between the first molding lower die 41 and the second molding lower die 42 is restored to the span satisfying the bending requirement. Placing the primary bending sample on a first forming lower die 41 and a second forming lower die 42, wherein the bent part is placed in a groove 411 of the first forming lower die 41, supporting the bent part by adjusting the height of a supporting plate 45 in the groove 411, positioning the primary bending sample by a positioning mechanism on the second forming lower die 42, then pressing down a certain position by controlling a convex die 5 and then lifting, completing secondary bending of the sample, namely, bending the other end of the sample into a U-shaped structure, and finally bending the whole sample into an S-shaped structure.

According to the bending machine provided by the invention, the two lower forming dies are arranged on the sliding table through the sliding table mechanism, the span between the two lower forming dies can be quickly adjusted through the driving of the sliding table mechanism, manual adjustment is not needed, the operation is convenient, time and labor are saved, and the bending machine can bend samples with different thicknesses; meanwhile, the forming die of the bending machine completes bending processing of the sample with the S-shaped structure. The bending machine is simple and compact in structure, convenient to transport and freely put, and wide in applicability.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.