bending machine

Abstract

This invention discloses a bending machine, comprising: a pressure plate; a pressure block detachably mounted on the pressure plate, forming a positioning gap between the pressure plate and the pressure block for clamping and positioning sheet metal parts; and a bridge plate, rotatably disposed near the positioning gap, the bridge plate being used to rotate to bend the sheet metal parts clamped in the positioning gap; wherein the pressure block is at least divided into a first pressure block and a second pressure block, the first pressure block and the second pressure block having different areas facing the pressure plate. The bending machine of this invention uses a detachable connection between the pressure block and the pressure plate, and provides at least two pressure blocks with different areas to accommodate sheet metal parts of different sizes, allowing users to quickly change to suitable pressure blocks according to the size and shape of the sheet metal parts. Simultaneously, the bending of the sheet metal parts is formed by the rotation of the bridge plate, the bending angle of the sheet metal parts being the same as the rotation angle of the bridge plate, and the user can control the bending angle of the sheet metal parts by controlling the rotation angle of the bridge plate.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing technology, and in particular to a bending machine. Background Technology

[0002] Sheet metal processing is a comprehensive cold working process for thin metal sheets, including shearing, punching, cutting, compounding, bending, welding, riveting, splicing, and forming. Products processed by the sheet metal industry are called sheet metal parts. In the sheet metal industry, the traditional operation for bending sheet metal parts is to use an upper and lower die mechanism to compress the sheet metal part into a shape corresponding to the upper and lower dies.

[0003] However, traditional sheet metal processing methods using upper and lower die mechanisms require changing the upper and lower dies when processing sheet metal parts of different sizes or altering their bending angles, which is time-consuming and labor-intensive. Therefore, the industry urgently needs a bending machine that can adapt to sheet metal parts of different sizes and quickly change their bending angles. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bending machine to solve the technical problem that the traditional method of processing sheet metal parts using upper and lower die mechanisms requires corresponding replacement of the upper and lower dies when it is necessary to process sheet metal parts of different sizes or change the bending angle of the sheet metal parts, which is time-consuming and labor-intensive.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a bending machine, comprising: a pressure plate; a pressure block detachably mounted on the pressure plate, wherein a positioning gap for clamping and positioning sheet metal parts is formed between the pressure plate and the pressure block; and a bridge plate rotatably disposed near the positioning gap, wherein the bridge plate is used to rotate to bend the sheet metal parts clamped in the positioning gap; wherein the pressure block is at least divided into a first pressure block and a second pressure block, and the areas of the first pressure block and the second pressure block facing the pressure plate are different.

[0007] Furthermore, it also includes a base plate and left and right bearing seats symmetrically arranged on the left and right sides of the base plate. The pressure plate is fixedly installed on the base plate. A left bearing is provided on the left bearing seat, and a left rotating shaft passes through the left bearing. A left connecting part is provided on the left rotating shaft, and the left end of the bridge plate is fixedly connected to the left connecting part. A right bearing is provided on the right bearing seat, and a right rotating shaft passes through the right bearing. A right connecting part is provided on the right rotating shaft, and the right end of the bridge plate is fixedly connected to the right connecting part.

[0008] Furthermore, it also includes a top block, which is detachably mounted on the bridge plate. The top block includes at least a first top block and a second top block. When the pressure block is mounted on the pressure plate and the top block is mounted on the bridge plate, the first top block corresponds to the first pressure block in the rotation direction of the bridge plate, and / or the second top block corresponds to the second pressure block in the rotation direction of the bridge plate.

[0009] Furthermore, a handle is provided on the side of the bridge plate away from its axis of rotation.

[0010] Furthermore, a rotary motor is provided on the left bearing housing, and the rotary motor's rotating shaft is driven to the left rotating shaft; or, a rotary motor is provided on the right bearing housing, and the rotary motor's rotating shaft is driven to the right rotating shaft; or, both the left and right bearing housings are provided with rotary motors that rotate in the same direction and at the same speed, with the rotary motor on the left bearing housing driven to the left rotating shaft, and the rotary motor on the right bearing housing driven to the right rotating shaft.

[0011] Furthermore, it also includes a lifting mechanism for the upright plate and the pressure plate. The upright plate is installed on the upper side of the base plate, and the pressure plate is installed on the upper side of the upright plate. The lifting mechanism for the pressure plate is used to drive the pressure plate to move up and down in the vertical direction. The lifting mechanism for the pressure plate includes a lead screw motor, a transmission lead screw, and a transmission nut. The transmission lead screw is connected to the power output end of the lead screw motor and passes through the upright plate in the vertical direction. The transmission nut is embedded in the upright plate and screwed to the transmission lead screw. When the lead screw motor is started, the lead screw motor drives the transmission lead screw to rotate. The transmission lead screw drives the transmission nut to rise or fall in the vertical direction. The transmission nut drives the upright plate and the pressure plate connected to the upright plate to move up and down synchronously.

[0012] Furthermore, the left bearing housing and the right bearing housing are provided with an electric locking mechanism, which is used to energize and limit the rotational movement of the left and right rotating shafts, so as to limit the rotational movement of the bridge plate.

[0013] Furthermore, the electrically driven locking mechanism includes a power supply and a braking component electrically connected to the power supply. The braking component is used to lock or release the rotation limit of the left and right rotating shafts. A first signal switch is connected in series between the power supply and the braking component. The first signal switch is used to turn on or off the power supply from the power supply to the braking component. A laser rangefinder is provided on the pressure plate. The laser rangefinder is used to detect the width of the positioning gap. If the width of the positioning gap is less than or equal to the thickness of the sheet metal part clamped by the positioning gap, the laser rangefinder sends a first conduction signal to the first signal switch to turn on the first signal switch. If the width of the positioning gap is greater than the thickness of the sheet metal part clamped by the positioning gap, the laser rangefinder sends a first disconnection signal to the first signal switch to disconnect the first signal switch.

[0014] A second signal switch is connected in series between the first signal switch and the braking assembly. The second signal switch is used to turn on or off the power supply of the power source to the braking assembly. A pressure sensor is provided on the mounting surface of the bridge plate for mounting the top block. If the pressure of the top block on the pressure sensor is greater than the weight of the top block, the pressure sensor sends a second on signal to the second signal switch to turn on the second signal switch. If the pressure of the top block on the pressure sensor is less than or equal to the weight of the top block, the pressure sensor sends a second off signal to the second signal switch to turn off the second signal switch.

[0015] A third signal switch is connected in series between the second signal switch and the braking assembly. The third signal switch is used to turn on or off the power supply to the braking assembly. The bending machine also includes a vision inspection camera. The vision inspection camera is used to detect whether the pressure block installed on the pressure plate and the top block installed on the bridge plate are aligned one-to-one. If the pressure block installed on the pressure plate and the top block installed on the bridge plate are aligned one-to-one, the vision inspection camera sends a third on signal to the third signal switch to turn on the third signal switch. If either the pressure block installed on the pressure plate or the top block installed on the bridge plate is misaligned, the vision inspection camera sends a third off signal to the third signal switch to turn off the third signal switch.

[0016] When the first signal switch, the second signal switch, and the third signal switch are all turned on, the circuit between the power supply and the braking assembly is connected, and the power supply provides power to the braking assembly; when any one of the first signal switch, the second signal switch, and the third signal switch is turned off, the circuit between the power supply and the braking assembly is disconnected, and the braking assembly has no power supply.

[0017] Furthermore, the braking assembly includes a clamping ring surrounding the left and right rotating shafts. The clamping ring includes an outer ring, a first inner half-ring, and a second inner half-ring. The outer ring is fixedly mounted on the left and right bearing seats, respectively. The first and second inner half-rings are arranged opposite each other inside the outer ring. The outer ring is connected to the first and second inner half-rings via a first telescopic rod and a second telescopic rod, respectively. When the clamping ring is de-energized, the first and second telescopic rods are extended, and the first and second inner half-rings clamp the left or right rotating shaft tightly. When the clamping ring is energized, the first and second telescopic rods retract to release the space between the first and second inner half-rings. The inner surfaces of the first and second inner half-rings are rough surfaces.

[0018] Furthermore, the left-hand rotating shaft and the right-hand rotating shaft are made of the same material. A first pressure sensor is provided on the inner side of the first inner half-ring, and a second pressure sensor is provided on the inner side of the second inner half-ring. The first telescopic rod, the second telescopic rod, the first pressure sensor, and the second pressure sensor are all electrically connected to the control system of the bending machine. When the clamping ring is de-energized, the control system controls the first telescopic rod and the second telescopic rod to move, so that the pressure values ​​of the first pressure sensor and the second pressure sensor are equal, and the pressure values ​​of the first pressure sensor and the second pressure sensor are both greater than 10% of the yield strength of the materials of the left-hand rotating shaft and the right-hand rotating shaft, and both are less than 50% of the yield strength of the materials of the left-hand rotating shaft and the right-hand rotating shaft. When the clamping ring is energized, the control system controls the first telescopic rod and the second telescopic rod to move, so that the pressure values ​​of the first pressure sensor and the second pressure sensor are both zero.

[0019] The bending machine of the present invention adopts a detachable connection between the pressure block and the pressure plate, and provides at least two pressure blocks with different areas to adapt to sheet metal parts of different sizes, so that users can quickly change the appropriate pressure block according to the size and shape of the sheet metal parts. At the same time, the bending of the sheet metal parts is formed by the rotation of the bridge plate, and the bending angle of the sheet metal parts is the same as the rotation angle of the bridge plate. Users can control the bending angle of the sheet metal parts by controlling the rotation angle of the bridge plate.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0021] Figure 1 This is a first perspective view of the bending machine according to an embodiment of the present invention;

[0022] Figure 2 This is a second perspective view of the bending machine according to an embodiment of the present invention;

[0023] Figure 3 This is an exploded view of a bending machine according to an embodiment of the present invention;

[0024] Figure 4 This is a first sectional view of the bending machine according to an embodiment of the present invention;

[0025] Figure 5 This is a second sectional view of the bending machine according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the separation structure of the pressure plate lifting mechanism of the bending machine according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the cooperation structure of the pressure plate lifting mechanism of the bending machine according to an embodiment of the present invention;

[0028] Figure 8 This is a first structural view of the electrically driven locking mechanism of the bending machine according to an embodiment of the present invention;

[0029] Figure 9 This is a second structural view of the electrically driven locking mechanism of the bending machine according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the connection relationship of the electric locking mechanism of the bending machine according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Pressure plate; 11. Pressure block; 111. First pressure block; 112. Second pressure block; 113. Positioning gap; 2. Bridge plate; 21. Top block; 211. First top block; 212. Second top block; 22. Handle; 3. Base plate; 4. Left bearing seat; 41. Left bearing; 42. Left rotating shaft; 43. Left connecting part; 5. Right bearing seat; 51. Right bearing; 52. Right rotating shaft; 53. Right connecting part; 6. Vertical plate; 7. Pressure plate lifting mechanism; 71. Transmission screw; 72. Transmission nut; 8. Electric locking mechanism; 81. Power supply; 82. Clamping ring; 821. Outer ring; 822. First inner half ring; 823. Second inner half ring; 824. First telescopic rod; 825. Second telescopic rod; 83. First signal switch; 84. Second signal switch; 85. Third signal switch. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "resin," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Please see the appendix Figures 1 to 10 This invention provides a bending machine, comprising: a pressure plate 1; a pressure block 11, the pressure block 11 being detachably mounted on the pressure plate 1, forming a positioning gap 113 between the pressure plate 1 and the pressure block 11 for clamping and positioning sheet metal parts; and a bridge plate 2, the bridge plate 2 being rotatably disposed near the positioning gap 113, the bridge plate 2 being used to rotate so that the sheet metal parts clamped in the positioning gap 113 are bent; wherein, the pressure block 11 is at least divided into a first pressure block 111 and a second pressure block 112, the areas of the first pressure block 111 and the second pressure block 112 facing the pressure plate 1 are different, and thus the size of the positioning gap 113 formed by the first pressure block 111, the second pressure block 112 and the pressure plate 1 is also different. In a sheet metal bending operation, the user first needs to select appropriate pressure blocks 11 (first pressure block 111, second pressure block 112) from the provided pressure blocks 11 according to the size and shape of the sheet metal to be bent, and install them onto the pressure plate 1 to ensure that the sheet metal can be stably clamped in the positioning gap 113; further, the sheet metal is placed in the positioning gap 113 formed between the pressure block 11 and the pressure plate 1, and the pressure block 11 is fastened to the pressure plate 1 using screws or clips to stably clamp the sheet metal, preparing it for subsequent bending operations. The bending operation provides stable support. Furthermore, the drive plate 2 rotates to apply pressure to the sheet metal part. Since the contact point between the bridge plate 2 and the sheet metal part is fixed, the rotation of the bridge plate 2 will cause the sheet metal part to bend at the contact point. The user can precisely control the bending angle of the sheet metal part by controlling the rotation angle of the bridge plate 2. When the bridge plate 2 rotates to the predetermined angle, it stops rotating and releases the clamping force on the sheet metal part. At this point, the sheet metal part has completed the bending operation, and the user can remove the bent sheet metal part from the positioning gap 113. It should be explained that in this embodiment, in addition to the first pressure block 111 and the second pressure block 112 with different areas, it may also include pressure blocks 11 of various specifications, such as the third pressure block 11 and the fourth pressure block 11, to adapt to more complex and special sheet metal bending requirements. Optionally, in this embodiment, the area of ​​the first pressing block 111 facing the pressure plate 1 is 10mm, and the area of ​​the second pressing block 112 facing the pressure plate 1 is 35mm. Furthermore, the shapes of the first pressing block 111 and the second pressing block 112 can be customized according to actual needs.

[0041] Furthermore, the bending machine of this solution also includes a base plate 3 and left bearing seats 4 and right bearing seats 5 symmetrically arranged on the left and right sides of the base plate 3. The pressure plate 1 is fixedly installed on the base plate 3. A left bearing 41 is provided on the left bearing seat 4, and a left rotating shaft 42 passes through the left bearing 41. A left connecting part 43 is provided on the left rotating shaft 42, and the left end of the bridge plate 2 is fixedly connected to the left connecting part 43. A right bearing 51 is provided on the right bearing seat 5, and a right rotating shaft 52 passes through the right bearing 51. A right connecting part 53 is provided on the right rotating shaft 52, and the right end of the bridge plate 2 is fixedly connected to the right connecting part 53. Understandably, the base plate 3 serves as the supporting foundation for the entire bending machine, ensuring the stability and load-bearing capacity of the equipment. The left bearing seat 4 and the right bearing seat 5 are respectively located on the left and right sides of the base plate 3, providing stable support and rotation points for the bridge plate 2. The left rotating shaft 42 and the right rotating shaft 52 are respectively inserted into the left bearing 41 and the right bearing 51, and are connected to the bridge plate 2 through the connecting part, realizing the smooth rotation of the bridge plate 2.

[0042] To ensure that the pressure applied to the sheet metal parts by the bridge plate 2 is more uniform during rotation and to improve the accuracy and quality of bending, the bending machine of this solution also includes a top block 21. The top block 21 is detachably installed on the bridge plate 2. The top block 21 includes at least a first top block 211 and a second top block 212. When the pressure block 11 is installed on the pressure plate 1 and the top block 21 is installed on the bridge plate 2, the first top block 211 corresponds to the first pressure block 111 in the rotation direction of the bridge plate 2, and / or the second top block 212 corresponds to the second pressure block 112 in the rotation direction of the bridge plate 2. In a sheet metal bending process, the appropriate pressure block 11 and top block 21 are first selected according to the size and shape of the sheet metal to be bent. The pressure block 11 is installed on the pressure plate 1 to form a positioning gap 113. The corresponding top block 21 is installed on the bridge plate 2, and the top block 21 and the pressure block 11 are aligned in the rotation direction of the bridge plate 2. Furthermore, when the bridge plate 2 rotates, the bridge plate 2 will drive the top block 21 to apply pressure to the sheet metal. The pressure can be evenly distributed on the sheet metal by the top block 21, thereby achieving a precise bending operation.

[0043] Furthermore, a handle 22 is provided on the side of the bridge plate 2 away from its axis of rotation. Users can more intuitively control the rotation of the bridge plate 2 through the handle 22, improving the convenience and efficiency of operation. Moreover, users can more precisely and stably control the force and direction when fine-tuning the rotation angle of the bridge plate 2, thereby improving the accuracy and quality of bending. Optionally, the surface of the handle 22 is coated with a silicone anti-slip material to improve the comfort and durability of the handle 22 during use.

[0044] Furthermore, a rotary motor is installed on the left bearing housing 4, and the rotating shaft of the rotary motor is driven and connected to the left rotating shaft 42; or, a rotary motor is installed on the right bearing housing 5, and the rotating shaft of the rotary motor is driven and connected to the right rotating shaft 52; or, both the left bearing housing 4 and the right bearing housing 5 are equipped with rotary motors with the same rotation direction and rotation speed, with the rotating shaft of the rotary motor on the left bearing housing 4 driven and connected to the left rotating shaft 42, and the rotating shaft of the rotary motor on the right bearing housing 5 driven and connected to the right rotating shaft 52. This embodiment, by introducing rotary motors, achieves automatic rotation control of the bridge plate 2, reducing the labor intensity of the operator. Furthermore, the rapid response and precise control of the rotary motors make the rotation of the bridge plate 2 faster and more stable, thereby improving the efficiency of the bending operation. It should be explained that when rotary motors are installed on both the left bearing housing 4 and the right bearing housing 5, it is necessary to ensure that the rotation direction and rotation speed of the two rotary motors are the same. A synchronous controller or encoder is required to achieve precise synchronous control of the two rotary motors.

[0045] Furthermore, the bending machine of this solution also includes a vertical plate 6 and a pressure plate lifting mechanism 7. The vertical plate 6 is installed on the upper side of the base plate 3, and the pressure plate 1 is installed on the upper side of the vertical plate 6. The pressure plate lifting mechanism 7 is used to drive the pressure plate 1 to move up and down in the vertical direction. The pressure plate lifting mechanism 7 includes a lead screw motor, a transmission lead screw 71, and a transmission nut 72. The transmission lead screw 71 is connected to the power output end of the lead screw motor and passes through the vertical plate 6. The transmission nut 72 is embedded in the vertical plate 6 and screwed to the transmission lead screw 71. When the lead screw motor starts, the lead screw motor drives the transmission lead screw 71 to rotate. The transmission lead screw 71 drives the transmission nut 72 to rise or fall in the vertical direction. The transmission nut 72 drives the vertical plate 6 and the pressure plate 1 connected to the vertical plate 6 to move up and down synchronously. It can be understood that the pressure plate lifting mechanism 7 enables the pressure plate 1 to move up and down in the vertical direction, thereby adapting to the bending requirements of sheet metal parts of different thicknesses and sizes.

[0046] Optionally, the bending machine 1 is equipped with an RFID reader, which enables the entire placement plane of the sheet metal placement platform (i.e., the part of the pressure plate 1 designed for placing sheet metal parts) to recognize RFID signals. Each sheet metal part is equipped with an RFID tag. During use, the RFID reader reads the RFID tag on the sheet metal part to identify the thickness of the sheet metal part. The control module controls the lead screw motor to automatically adjust the height of the pressure plate 1 according to the thickness of the sheet metal part.

[0047] Furthermore, if the height of the pressure plate 1 is automatically adjusted as soon as a sheet metal part is placed on it, it could easily cause the pressure plate 1 to injure the operator. Therefore, a start tag placement area is defined on the sheet metal part placement platform. The start tag placement area is used to place objects with start RFID tags. When no start RFID tag is detected in the start tag placement area, the screw motor does not work. After the user places the sheet metal part on the sheet metal part placement platform, the object with the start RFID tag is placed in the start tag placement area. Then, the control module controls the screw motor to automatically adjust the height of the pressure plate 1 according to the thickness of the sheet metal part to prevent accidental injury to the operator.

[0048] The system can be equipped with two RFID readers, one positioned below the area where the activation tag is placed and the other below the area where the non-activation tag is placed. Based on the order in which the two RFID readers detect the activation RFID tags (time difference of arrival) or the signal strength, it can determine whether the object with the activation RFID tag is placed in the area where the tag is placed or the area where the tag is not placed on the sheet metal placement platform. This allows users to pick up the object with the activation RFID tag and place it directly in the area where the tag is placed next to the area where the tag is placed, without having to find another place to put it, making the operation simpler and more convenient.

[0049] Furthermore, an electrically driven locking mechanism 8 is provided on the left bearing housing 4 and the right bearing housing 5. The electrically driven locking mechanism 8 is energized to limit the rotational movement of the left rotating shaft 42 and the right rotating shaft 52, thereby limiting the rotational movement of the bridge plate 2. Under normal circumstances, the electrically driven locking mechanism 8 is in a locked state, that is, the electromagnet is not energized. The electrically driven locking mechanism 8 contacts the left rotating shaft 42 or the right rotating shaft 52 and generates frictional force, thereby limiting the rotational movement of the bridge plate 2.

[0050] Specifically, the electric locking mechanism 8 includes a power supply 81 and a braking assembly electrically connected to the power supply 81. The braking assembly is used to lock or release the rotation limit of the left rotating shaft 42 and the right rotating shaft 52. A first signal switch 83 is connected in series between the power supply 81 and the braking assembly. The first signal switch 83 is used to turn on or off the power supply from the power supply 81 to the braking assembly. A laser rangefinder is provided on the pressure plate 1. The laser rangefinder is used to detect the width of the positioning gap 113. If the width of the positioning gap 113 is less than or equal to the thickness of the sheet metal part clamped by the positioning gap 113, the laser rangefinder sends a first conduction signal to the first signal switch 83 to turn on the first signal switch 83. If the width of the positioning gap 113 is greater than the thickness of the sheet metal part clamped by the positioning gap 113, the laser rangefinder sends a first disconnection signal to the first signal switch 83 to disconnect the first signal switch 83. Understandably, before the sheet metal part is clamped, the width of the positioning gap 113 is usually greater than the thickness of the sheet metal part. At this time, the width value detected by the laser rangefinder is greater than the thickness value of the sheet metal part, so a first disconnect signal is sent to the first signal switch 83, causing the first signal switch 83 to be in the disconnected state, and the braking assembly does not work. When the sheet metal part is placed in the positioning gap 113 and is ready to be clamped, the laser rangefinder continuously detects the width value. Once the width value decreases to less than or equal to the thickness value of the sheet metal part, it indicates that the sheet metal part has been correctly clamped. The laser rangefinder then sends a first conduction signal to the first signal switch 83. After receiving the first conduction signal, the first signal switch 83 conducts the circuit, allowing the power supply 81 to supply power to the braking assembly. The braking assembly then releases the rotation limit on the left rotating shaft 42 and the right rotating shaft 52. By monitoring the width of the positioning gap 113 in real time and comparing it with the thickness of the sheet metal part, the system can ensure that the sheet metal part is accurately clamped and avoid being too tight or too loose. When the width of the positioning gap 113 is abnormal, the braking component will automatically lock, thereby preventing bending operations that are not properly clamped in the sheet metal part from causing injury to the workers.

[0051] Furthermore, a second signal switch 84 is connected in series between the first signal switch 83 and the braking assembly. The second signal switch 84 is used to turn on or off the power supply from the power source 81 to the braking assembly. A pressure sensor is provided on the mounting surface of the bridge plate 2 for mounting the top block 21. If the pressure of the top block 21 on the pressure sensor is greater than the weight of the top block 21, the pressure sensor sends a second on signal to the second signal switch 84 to turn it on. If the pressure of the top block 21 on the pressure sensor is less than or equal to the weight of the top block 21, the pressure sensor sends a second off signal to the second signal switch 84 to turn it off. It can be understood that when the bending machine is not started or the top block 21 is not in the expected position, the pressure sensor detects a pressure less than or equal to the weight of the top block 21, and therefore sends a second off signal to the second signal switch 84, causing the second signal switch 84 to be in the off state, thereby cutting off the power supply from the power source 81 to the braking assembly, ensuring that the braking assembly is in the locked state and the bridge plate 2 cannot rotate. When the top block 21 is moved to the expected position and sufficient pressure is applied to the pressure sensor, the pressure sensor detects a pressure greater than the weight of the top block 21, and thus sends a second conduction signal to the second signal switch 84. The second signal switch 84 conducts the circuit after receiving the second conduction signal. However, whether the braking assembly actually works at this time depends on the state of the first signal switch 83. If the first signal switch 83 is also in the conduction state, the power supply 81 will supply power to the braking assembly, the braking assembly will be released, and the bridge plate 2 will be allowed to rotate to bend the sheet metal.

[0052] Furthermore, a third signal switch 85 is connected in series between the second signal switch 84 and the braking assembly. The third signal switch 85 is used to turn on or off the power supply 81 to the braking assembly. The bending machine also includes a vision inspection camera, which is used to detect whether the pressure block 11 installed on the pressure plate 1 and the top block 21 installed on the bridge plate 2 are aligned one-to-one. If the pressure block 11 installed on the pressure plate 1 and the top block 21 installed on the bridge plate 2 are aligned one-to-one, the vision inspection camera sends a third on signal to the third signal switch 85 to turn on the third signal switch 85. If either the pressure block 11 installed on the pressure plate 1 or the top block 21 installed on the bridge plate 2 is misaligned, the vision inspection camera sends a third off signal to the third signal switch 85 to turn off the third signal switch 85.

[0053] When the first signal switch 83, the second signal switch 84, and the third signal switch 85 are all turned on, the circuit between the power supply 81 and the braking assembly is connected, and the power supply 81 provides power to the braking assembly; when any one of the first signal switch 83, the second signal switch 84, and the third signal switch 85 is turned off, the circuit between the power supply 81 and the braking assembly is disconnected, and the braking assembly has no power supply.

[0054] Understandably, when the pressure block 11 and the top block 21 are not aligned, the alignment detected by the visual inspection camera does not meet the requirements. Therefore, a third disconnect signal is sent to the third signal switch 85, causing the third signal switch 85 to be in the disconnected state. The entire circuit between the power supply 81 and the braking assembly is disconnected, and the braking assembly has no power supply. When the pressure block 11 and the top block 21 are moved to the expected position and correctly aligned, the alignment detected by the visual inspection camera meets the requirements. Therefore, a third conduction signal is sent to the third signal switch 85. Only when the first signal switch 83, the second signal switch 84, and the third signal switch 85 are all in the conduction state is the circuit between the power supply 81 and the braking assembly conducted, and the power supply 81 provides power to the braking assembly, releasing the braking assembly. If any signal switch is in the disconnected state, the circuit between the power supply 81 and the braking assembly will be disconnected, and the braking assembly will have no power supply and remain locked.

[0055] Furthermore, the braking assembly includes a clamping ring 82 surrounding the left pivot 42 and the right pivot 52. The clamping ring 82 includes an outer ring 821, a first inner half ring 822, and a second inner half ring 823. The outer ring 821 is fixedly installed on the left bearing seat 4 and the right bearing seat 5, respectively. The first inner half ring 822 and the second inner half ring 823 are arranged opposite each other inside the outer ring 821. The outer ring 821 is connected to the first inner half ring 822 and the second inner half ring 823 by a first telescopic rod 824 and a second telescopic rod 825, respectively. When the clamping ring 82 is de-energized, the first telescopic rod 824 and the second telescopic rod 825 are in the extended state, and the first inner half ring 822 and the second inner half ring 823 tightly clamp the left pivot 42 and the right pivot 52. When the clamping ring 82 is energized, the first telescopic rod 824 and the second telescopic rod 825 retract to release the space between the first inner half ring 822 and the second inner half ring 823. Furthermore, the inner surfaces of the first inner half-ring 822 and the second inner half-ring 823 are rough surfaces, which can provide greater resistance to the rotation of the left rotating shaft 42 and the right rotating shaft 52. Understandably, when the clamping ring 82 is de-energized, the first telescopic rod 824 and the second telescopic rod 825 automatically extend to their maximum length. This extension causes the left rotating shaft 42 or the right rotating shaft 52 to be firmly clamped between the first inner half-ring 822 and the second inner half-ring 823, achieving a tight clamping of the shaft and preventing accidental rotation. When the clamping ring 82 is energized, current flows into the internal circuit structure of the first telescopic rod 824 and the second telescopic rod 825, causing the first telescopic rod 824 and the second telescopic rod 825 to rapidly retract, thereby releasing the space between the first inner half-ring 822 and the second inner half-ring 823, so that they no longer exert a clamping effect on the left rotating shaft 42 and the right rotating shaft 52, meeting the needs of the bending machine under normal operating conditions.

[0056] Specifically, the left-hand rotating shaft 42 and the right-hand rotating shaft 52 are made of the same material. A first pressure sensor is provided on the inner side of the first inner half-ring 822, and a second pressure sensor is provided on the inner side of the second inner half-ring 823. The first telescopic rod 824, the second telescopic rod 825, the first pressure sensor, and the second pressure sensor are all electrically connected to the control system of the bending machine. When the clamping ring 82 is de-energized, the control system controls the first telescopic rod 824 and the second telescopic rod 825 to move, so that the pressure values ​​of the first pressure sensor and the second pressure sensor are equal, and the pressure values ​​of the first pressure sensor and the second pressure sensor are both greater than 10% of the yield strength of the materials of the left-hand rotating shaft 42 and the right-hand rotating shaft 52, and both are less than 50% of the yield strength of the materials of the left-hand rotating shaft 42 and the right-hand rotating shaft 52. When the clamping ring 82 is energized, the control system controls the first telescopic rod 824 and the second telescopic rod 825 to move, so that the pressure values ​​of the first pressure sensor and the second pressure sensor are both zero.

[0057] In this embodiment of the bending machine, the pressure block and the pressure plate are detachably connected, and at least two types of pressure blocks with different areas are provided to accommodate sheet metal parts of different sizes. This allows users to quickly change the appropriate pressure block according to the size and shape of the sheet metal parts. At the same time, the bending of the sheet metal parts is formed by the rotation of the bridge plate, and the bending angle of the sheet metal parts is the same as the rotation angle of the bridge plate. Users can control the bending angle of the sheet metal parts by controlling the rotation angle of the bridge plate.

[0058] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A bending machine, characterized in that, include: Pressure plate; A pressure block is detachably mounted on the pressure plate, and a positioning gap is formed between the pressure plate and the pressure block for clamping and positioning sheet metal parts; A bridge plate, which is located close to the positioning gap and is rotatably disposed, is used to rotate so that the sheet metal part clamped in the positioning gap can be bent; The pressure block is at least divided into a first pressure block and a second pressure block, and the areas of the first pressure block and the second pressure block facing the pressure plate are different. It also includes a base plate and left and right bearing seats symmetrically arranged on the left and right sides of the base plate. The pressure plate is fixedly installed on the base plate. A left bearing is provided on the left bearing seat, a left rotating shaft passes through the left bearing, and a left connecting part is provided on the left rotating shaft. The left end of the bridge plate is fixedly connected to the left connecting part. A right bearing is provided on the right bearing seat, a right rotating shaft passes through the right bearing, and a right connecting part is provided on the right rotating shaft. The right end of the bridge plate is fixedly connected to the right connecting part. It also includes a top block, which is detachably mounted on the bridge plate. The top block includes at least a first top block and a second top block. When the pressure block is mounted on the pressure plate and the top block is mounted on the bridge plate, the first top block corresponds to the first pressure block in the rotation direction of the bridge plate, and / or the second top block corresponds to the second pressure block in the rotation direction of the bridge plate. The left bearing housing and the right bearing housing are provided with an electric locking mechanism. The electric locking mechanism is used to be energized to limit the rotational movement of the left rotating shaft and the right rotating shaft, so that the rotational movement of the bridge plate is limited. The electrically driven locking mechanism includes a power supply and a braking component electrically connected to the power supply. The braking component is used to lock or release the rotation limit of the left and right rotating shafts. A first signal switch is connected in series between the power supply and the braking component. The first signal switch is used to turn on or off the power supply from the power supply to the braking component. A laser rangefinder is provided on the pressure plate. The laser rangefinder is used to detect the width of the positioning gap. If the width of the positioning gap is less than or equal to the thickness of the sheet metal part held by the positioning gap, the laser rangefinder sends a first conduction signal to the first signal switch to turn on the first signal switch. If the width of the positioning gap is greater than the thickness of the sheet metal part held by the positioning gap, the laser rangefinder sends a first disconnection signal to the first signal switch to disconnect the first signal switch. A second signal switch is connected in series between the first signal switch and the braking assembly. The second signal switch is used to turn on or off the power supply of the power source to the braking assembly. A pressure sensor is provided on the mounting surface of the bridge plate for mounting the top block. If the pressure of the top block on the pressure sensor is greater than the weight of the top block, the pressure sensor sends a second on signal to the second signal switch to turn on the second signal switch. If the pressure of the top block on the pressure sensor is less than or equal to the weight of the top block, the pressure sensor sends a second off signal to the second signal switch to turn off the second signal switch. A third signal switch is connected in series between the second signal switch and the braking assembly. The third signal switch is used to turn on or off the power supply to the braking assembly. The bending machine also includes a vision inspection camera. The vision inspection camera is used to detect whether the pressure block installed on the pressure plate and the top block installed on the bridge plate are aligned one-to-one. If the pressure block installed on the pressure plate and the top block installed on the bridge plate are aligned one-to-one, the vision inspection camera sends a third on signal to the third signal switch to turn on the third signal switch. If either the pressure block installed on the pressure plate or the top block installed on the bridge plate is misaligned, the vision inspection camera sends a third off signal to the third signal switch to turn off the third signal switch. When the first signal switch, the second signal switch, and the third signal switch are all turned on, the circuit between the power supply and the braking assembly is connected, and the power supply provides power to the braking assembly; when any one of the first signal switch, the second signal switch, and the third signal switch is turned off, the circuit between the power supply and the braking assembly is disconnected, and the braking assembly has no power supply.

2. A bending machine according to claim 1, characterized in that, A handle is provided on the side of the bridge plate away from its axis of rotation.

3. A bending machine according to claim 1, characterized in that, A rotary motor is provided on the left bearing housing, and the rotating shaft of the rotary motor is driven to the left rotating shaft; or, a rotary motor is provided on the right bearing housing, and the rotating shaft of the rotary motor is driven to the right rotating shaft; or, both the left and right bearing housings are provided with rotary motors that have the same rotation direction and rotation speed, the rotating shaft of the rotary motor on the left bearing housing is driven to the left rotating shaft, and the rotating shaft of the rotary motor on the right bearing housing is driven to the right rotating shaft.

4. A bending machine according to claim 1, characterized in that, It also includes a lifting mechanism for a vertical plate and a pressure plate. The vertical plate is installed on the upper side of the base plate, and the pressure plate is installed on the upper side of the vertical plate. The lifting mechanism for the pressure plate is used to drive the pressure plate to move up and down in the vertical direction. The lifting mechanism for the pressure plate includes a lead screw motor, a transmission lead screw, and a transmission nut. The transmission lead screw is connected to the power output end of the lead screw motor and passes through the vertical plate. The transmission nut is embedded in the vertical plate and screwed to the transmission lead screw. When the lead screw motor is started, the lead screw motor drives the transmission lead screw to rotate. The transmission lead screw drives the transmission nut to rise or fall in the vertical direction. The transmission nut drives the vertical plate and the pressure plate connected to the vertical plate to move up and down synchronously.

5. A bending machine according to claim 1, characterized in that, The braking assembly includes a clamping ring surrounding the left and right turning shafts. The clamping ring comprises an outer ring, a first inner half-ring, and a second inner half-ring. The outer ring is fixedly mounted on the left and right bearing seats, respectively. The first and second inner half-rings are arranged opposite each other inside the outer ring. The outer ring is connected to the first and second inner half-rings via a first telescopic rod and a second telescopic rod, respectively. When the clamping ring is de-energized, the first and second telescopic rods are extended, and the first and second inner half-rings clamp the left or right turning shaft tightly. When the clamping ring is energized, the first and second telescopic rods retract to release the space between the first and second inner half-rings. The inner surfaces of the first and second inner half-rings are rough surfaces.

6. A bending machine according to claim 5, characterized in that, The left and right rotating shafts are made of the same material. A first pressure sensor is provided on the inner side of the first inner half-ring, and a second pressure sensor is provided on the inner side of the second inner half-ring. The first telescopic rod, the second telescopic rod, the first pressure sensor, and the second pressure sensor are all electrically connected to the control system of the bending machine. When the clamping ring is de-energized, the control system controls the first and second telescopic rods to move, so that the pressure values ​​of the first and second pressure sensors are equal, and the pressure values ​​of the first and second pressure sensors are both greater than 10% of the yield strength of the materials of the left and right rotating shafts and less than 50% of the yield strength of the materials of the left and right rotating shafts. When the clamping ring is energized, the control system controls the first and second telescopic rods to move, so that the pressure values ​​of the first and second pressure sensors are both zero.

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