Bending center workpiece visual monitoring device and bending center

Abstract

The utility model provides a bending center workpiece visual monitoring device and a bending center. The bending center workpiece visual monitoring device comprises a clamping assembly, a visual monitoring assembly and a control assembly, the light source assembly is installed on one side of the clamping assembly. The projection assembly is installed on the side, away from the light source assembly, of the clamping assembly. The workpiece is irradiated through the light source assembly, the projection of the workpiece falls on the projection assembly, the projection angle of the workpiece is monitored, and whether the bending angle of the workpiece meets the workpiece bending standard or not is judged; the bending angle of the workpiece is monitored through the monitoring device, meanwhile, the bending assembly is matched with the bending center to conduct supplementary bending on the bending angle of the workpiece so that the workpiece can reach the standard, and the thickness of the workpiece can be monitored according to the distance between the clamping assemblies; and it is ensured that the visual device can check the accuracy of each bending angle on line in the batch production process after angle compensation of the bent sample pieces is completed.

Description

Technical Field

[0001] The present application relates to a monitoring device, and more particularly to a bending center workpiece visual monitoring device and a bending center. Background Art

[0002] At present, due to the precision errors of the machine tools and cutting tools in the bending centers on the market, the actual bending workpiece angles and theoretical values ​​will be different. Therefore, before each batch of sheet metal bending begins, after the first piece is bent, the operator needs to measure the workpiece angle and size, calculate the compensation value and set it in the bending process before bending the second piece. After bending the second piece, the operator measures the workpiece angle and size to evaluate whether the precision standard is met. If it is met, batch bending will begin. If there is still an error, the compensation value will continue to be corrected. Generally, each batch of workpiece proofing and bending needs to be adjusted 2 to 3 times to meet the set precision requirements, which will cause damage to the workpiece and affect production efficiency. Utility Model Content

[0003] The embodiment of the present application provides a bending center workpiece visual monitoring device and a bending center to solve the problems existing in the related technology. The technical solution is as follows:

[0004] In a first aspect, an embodiment of the present application provides a bending center workpiece visual monitoring device, comprising:

[0005] A clamping assembly, which clamps the workpiece to be bent and is installed on the bending center;

[0006] A light source assembly, the light source assembly is installed on one side of the clamping assembly, and the light source center of the light source assembly and the bending part of the workpiece are located on the same horizontal straight line;

[0007] The projection assembly is installed on the side of the clamping assembly away from the light source assembly. The light source assembly illuminates the workpiece on the clamping assembly so that the side projection of the workpiece falls on the projection assembly. The bending angle of the workpiece is monitored by the angle of the projection of the workpiece on the projection assembly.

[0008] In one embodiment,

[0009] The clamping assembly includes:

[0010] Fixed upper knife, which is installed on the slider of the bending center, and is driven up and down by the slider on the bending center;

[0011] The fixed lower knife is installed on the bending center. The fixed lower knife and the fixed upper knife are located on the same straight line. The bent workpiece is clamped by the movement of the fixed upper knife and the fixed lower knife. The light source component and the projection component are respectively installed on both sides of the fixed lower knife.

[0012] In one embodiment,

[0013] Both the fixed upper knife and the fixed lower knife have a tip. When the fixed upper knife and the fixed lower knife are closed, the tip of the fixed upper knife fits the bending part of the bent workpiece.

[0014] In one embodiment,

[0015] The light source assembly includes:

[0016] Adjustment base, the adjustment base is installed on the side where the lower knife is fixed;

[0017] The light source generator is installed on the adjustment base, and the position of the light source generator is adjusted by the adjustment base so that the light source center of the light source generator and the bending part of the workpiece are located on the same horizontal straight line.

[0018] In one embodiment,

[0019] Two sets of adjustment screws are connected to the adjustment base, and the adjustment screws are threadedly connected to the light source generator. The up and down height and pitch angle of the light source generator are adjusted by adjusting the adjustment screws.

[0020] In one embodiment,

[0021] Long strip holes are opened on both sides of the adjustment base. The adjustment base is adjusted laterally by changing the connection position between the hole and the fixed lower knife, so that the light source generator can be adjusted horizontally.

[0022] In one embodiment,

[0023] The projection components include:

[0024] The projection screen is installed on the side of the fixed lower cutter away from the adjustment base, and the light source generator projects the projection of the bent workpiece onto the projection screen;

[0025] The camera is installed on the fixed lower knife. The camera shoots the projection on the projection screen and transmits the shot image to the computer.

[0026] In one embodiment,

[0027] The shooting center of the camera and the shooting center of the projection screen are both located on a horizontal straight line between the light source emitter and the tip.

[0028] In a second aspect, an embodiment of the present application provides a bending center, including:

[0029] A visual monitoring device for a bending center workpiece as described in any one of the above embodiments; and

[0030] The bending component cooperates with the clamping component to bend the workpiece. When the monitoring device detects that the bending angle of the workpiece does not meet the requirements, the bending component is used to compensate for the workpiece bending so that the workpiece meets the bending standard.

[0031] In one embodiment,

[0032] The bending component is provided with a recess which matches the shape of the tip of the clamping component, and the bending angle of the workpiece is supplemented by the horizontal movement of the bending component toward the tip of the clamping component.

[0033] The advantages or beneficial effects of the above technical solution include at least:

[0034] The workpiece is illuminated by the light source component so that the projection of the workpiece falls on the projection component. By monitoring the angle of the workpiece projection, it is determined whether the bending angle of the workpiece meets the workpiece bending standard. The light source center of the light source component and the bending part of the workpiece are located on the same horizontal line to ensure that during the process of the light source irradiating the workpiece, the side projection of the workpiece will not deviate, which will affect the judgment of the bending of the workpiece.

[0035] The bending angle of the workpiece is monitored by the monitoring device. At the same time, the bending assembly cooperates with the bending center to perform additional bending on the workpiece to make the workpiece meet the standard. The thickness of the workpiece can be monitored according to the distance between the clamping assemblies to ensure that after the angle compensation of the bending sample is completed, the visual device will check the accuracy of each bending angle online during mass production.

[0036] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0038] Figure 1 It is a schematic diagram of the structure of the utility model;

[0039] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the middle clamping assembly;

[0040] Figure 3 It is a schematic diagram of the structure of the bending component bending the workpiece 90°;

[0041] Figure 4 This is a schematic diagram of the structure in which the workpiece is freely unfolded 100°;

[0042] Figure 5 It is a schematic diagram of the structure of the bending component bending the workpiece 80°;

[0043] 100. Monitoring device;

[0044] 110, clamping assembly; 111, fixing the upper knife; 112, fixing the lower knife;

[0045] 120, light source assembly; 121, adjustment base; 122, light source generator; 123, adjustment screw; 124, hole;

[0046] 130. projection assembly; 131. projection screen; 132. camera;

[0047] 201. Bending components. DETAILED DESCRIPTION

[0048] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0049] In the related art, a bending center is a CNC machine tool equipment for automatic bending of sheet metal.

[0050] The servo motors of the upper and lower pressure plate axes Z1 / Z2 of the bending equipment convert rotational motion into linear motion through the screw nut substructure, driving the upper slider mechanism to move up and down. An upper pressing knife is installed at the lower end of the upper slider. When the U-axis of the feeding mechanism sends the sheet metal workpiece to the specified bending position, the U-axis positioning is used to determine the bending size of the workpiece. The servo motors of the Z1 / Z2 axis drive the upper slider mechanism downward to press the sheet metal workpiece through the upper pressing knife to fix it. Then, the front and rear bending axes X1 / X2 and the upper and lower bending axes Y1 / Y2 of the movable tool holder device are linked to control to complete bending of different angles and sizes according to the set trajectory.

[0051] The CNC system will automatically calculate the positioning position of the U-axis, X-axis and Y-axis of the workpiece according to the material, thickness and width of the sheet metal to obtain the set angle and size of the workpiece. However, due to the precision errors of the machine tool and the tool itself, the actual bending angle of the workpiece will be different from the theoretical value. Therefore, for each batch of sheet metal bending, after the first piece is bent, the operator needs to measure the angle and size of the workpiece, calculate the compensation value and set it in the bending step before bending the second piece. After bending the second piece, the operator measures the angle and size of the workpiece to evaluate whether it meets the precision standard. If it does, batch bending will begin. If there is still an error, the compensation value will continue to be corrected. Generally, each batch of workpiece proofing and bending needs to be adjusted 2 to 3 times to meet the set precision requirements, which will cause damage to the workpiece and affect production efficiency.

[0052] In addition, the automatic feeding of the bending center uses robots or truss-type manipulators to realize unmanned workpiece grabbing and loading and unloading. Since the workpieces are placed in a stacked manner on the rack workbench, due to the adsorption effect of the sheet metal workpieces during the grabbing process, it is possible to grab 2-3 workpieces at a time for bending, causing abnormal accidents in the bending center. The actual thickness of the workpiece can be measured by the visual device. If the thickness exceeds the upper limit of the actual thickness of the workpiece, the CNC system automatically alarms and stops the bending center to avoid damage to the workpiece and machine tool components.

[0053] Figure 1-Figure 2 FIG. 1 is a structural diagram of a bending center workpiece visual monitoring device 100 according to an embodiment of the present application. Figure 1-Figure 2 As shown, the monitoring device 100 may include:

[0054] A clamping assembly 110, the clamping assembly 110 clamps the bent workpiece, and the clamping assembly 110 is installed on the bending center;

[0055] A light source assembly 120, which is mounted on one side of the clamping assembly 110, and the center of the light source of the light source assembly 120 and the bending part of the workpiece are located on the same horizontal line;

[0056] The projection assembly 130 is installed on the side of the clamping assembly 110 away from the light source assembly 120. The light source assembly 120 illuminates the workpiece on the clamping assembly 110 so that the side projection of the workpiece falls on the projection assembly 130. The bending angle of the workpiece is monitored by the angle of the projection of the workpiece on the projection assembly 130.

[0057] In this embodiment, the bent workpiece is placed on the clamping assembly 110 so that the bending part of the workpiece fits with the clamping assembly 110. The light source assembly 120 is adjusted so that the center of the light source of the light source assembly 120 and the bending part of the workpiece are located on the same horizontal line. The light source assembly 120 emits light from one side of the clamping assembly 110 to the other side so that the projection of the side of the workpiece is projected on the projection assembly 130. It is determined whether the bending angle of the workpiece meets the bending angle of the workpiece by the angle of the projection of the workpiece.

[0058] The workpiece is illuminated by the light source assembly 120 so that the projection of the workpiece falls on the projection assembly 130. By monitoring the angle of the workpiece projection, it is determined whether the bending angle of the workpiece meets the workpiece bending standard. The light source center of the light source assembly 120 and the bending point of the workpiece are located on the same horizontal straight line, ensuring that during the process of the light source irradiating the workpiece, the side projection of the workpiece will not deviate, thereby affecting the judgment of the bending of the workpiece.

[0059] like Figure 1-Figure 2 As shown, in one embodiment,

[0060] The clamping assembly 110 includes:

[0061] The fixed upper knife 111 is installed on the slider of the bending center, and the fixed upper knife 111 is driven to move up and down by the slider on the bending center;

[0062] The fixed lower knife 112 is installed on the bending center. The fixed lower knife 112 and the fixed upper knife 111 are located on the same straight line. The bent workpiece is clamped by the movement of the fixed upper knife 111 and the fixed lower knife 112. The light source assembly 120 and the projection assembly 130 are respectively installed on both sides of the fixed lower knife 112.

[0063] In this embodiment, the fixed upper knife 111 is driven by a slider on the bending center, and the fixed lower knife 112 is fixedly installed on the bending center. The fixed lower knife 112 is located on the movement path of the fixed upper knife 111. The workpiece is placed on the fixed lower knife 112, and the workpiece is clamped by the movement of the fixed upper knife 111.

[0064] like Figure 1-Figure 2 As shown, in one embodiment,

[0065] Both the fixed upper knife 111 and the fixed lower knife 112 have a pointed end. When the fixed upper knife 111 and the fixed lower knife 112 are closed, the pointed end of the fixed upper knife 111 fits against the bending part of the bent workpiece.

[0066] In this embodiment, the workpiece is placed on the fixed lower knife 112 so that the bending part of the workpiece is located at the tip of the fixed lower knife 112, and the fixed upper knife 111 and the fixed lower knife 112 are closed so that the inside of the bending part of the workpiece is fitted with the tip of the fixed upper knife 111, which facilitates the light source assembly 120 to position the workpiece and the bending part of the workpiece.

[0067] like Figure 1-Figure 2 As shown, in one embodiment,

[0068] The light source assembly 120 includes:

[0069] An adjustment base 121, the adjustment base 121 is installed on one side of the fixed lower knife 112;

[0070] The light source generator 122 is mounted on the adjustment base 121 , and the position of the light source generator 122 is adjusted by the adjustment base 121 so that the light source center of the light source generator 122 and the bending part of the workpiece are located on the same horizontal straight line.

[0071] Two groups of adjusting screws 123 are connected to the adjustment base 121 . The adjusting screws 123 are threadedly connected to the light source generator 122 . The vertical height and the pitch angle of the light source generator 122 are adjusted by the adjusting screws 123 .

[0072] Long strip-shaped holes 124 are provided on both sides of the adjustment base 121. The adjustment base 121 is adjusted laterally by changing the connection position between the holes 124 and the fixed lower knife 112, so that the light source generator 122 can be adjusted horizontally.

[0073] In this embodiment, when the two groups of adjusting screws 123 rotate at the same time, the height of the light source generator 122 is adjusted. When the group of adjusting screws 123 far from the light source generator 122 rotates and the other group of adjusting screws 123 does not rotate, the light source of the light source generator 122 moves downward. When the group of adjusting screws 123 close to the light source generator 122 rotates and the other group of adjusting screws 123 does not rotate, the light source of the light source generator 122 moves upward, and the irradiation height of the light source is adjusted.

[0074] When the light source needs to be adjusted laterally, the position of the adjustment base 121 is adjusted laterally through the long strip hole 124 to change the position of the light source generator 122, and the light source is adjusted to ensure that the center of the light source of the light source generator 122 and the bending part of the workpiece are on the same horizontal line, ensuring that the projection of the side of the workpiece is a positive projection, avoiding deviations in workpiece monitoring.

[0075] like Figure 1 As shown, in one embodiment,

[0076] The projection assembly 130 includes:

[0077] A projection screen 131, which is installed on a side of the fixed lower knife 112 away from the adjustment base 121, and the light source generator 122 projects the bending workpiece onto the projection screen 131;

[0078] The camera 132 is installed on the fixed lower knife 112. The camera 132 shoots the projection on the projection screen 131 and transmits the shot image to the computer.

[0079] The shooting center of the camera 132 and the shooting center of the projection screen 131 are both located on a horizontal straight line between the light source emitter and the tip.

[0080] In this embodiment, the light source generator 122 projects the side of the workpiece onto the projection screen 131, and the projection of the workpiece on the projection screen 131 is photographed by the camera 132 and transmitted to the external computer system. The system determines whether the bending degree of the workpiece meets the standard, and controls the bending center through the computer system to take further measures; the shooting center of the camera 132 and the shooting center of the projection screen 131 are both located on the horizontal straight line between the light source emitter and the tip, ensuring that the picture taken by the camera 132 will not deviate from the actual situation, affecting the accuracy of the bending adjustment of the workpiece.

[0081] Figure 1-Figure 2 FIG. 2 shows a structural diagram of a bending center according to an embodiment of the present utility model. Figure 1-Figure 2 As shown, the bending center may include:

[0082] A bending center workpiece visual monitoring device 100 as described in any one of the above embodiments; and

[0083] The bending assembly 201 cooperates with the clamping assembly 110 to bend the workpiece. When the monitoring device 100 detects that the bending angle of the workpiece does not meet the requirement, the bending assembly 201 performs compensation bending on the workpiece to make the workpiece meet the bending standard.

[0084] The bending component 201 has a recess that matches the shape of the tip of the clamping component 110 , and the bending angle of the workpiece is supplemented by the horizontal movement of the bending component 201 toward the tip of the clamping component 110 .

[0085] In this embodiment, the workpiece is placed on the clamping assembly 110, and the bending assembly 201 moves in the direction of the clamping assembly 110 to bend the workpiece. The depression on the bending assembly 201 matches the tip of the clamping assembly 110, so that the workpiece is bent by 90°, and the bending angle of the workpiece is monitored by the monitoring device 100, and timely controlled by the computer system;

[0086] The bending angle of the workpiece is monitored by the monitoring device 100. At the same time, the bending component 201 cooperates with the bending center to perform additional bending on the workpiece to make the workpiece meet the standard. The thickness of the workpiece can be monitored according to the distance between the clamping components 110 to ensure that after the angle compensation of the bending sample is completed, the visual device will check the accuracy of each bending angle online during mass production.

[0087] like Figure 3 As shown, according to the computer control system, it is assumed that the workpiece needs to be bent 90°, that is, the workpiece is preset to be bent 90° as a standard value, and the groove on the bending component 201 cooperates with the bending component 201 to bend the workpiece;

[0088] like Figure 4-Figure 5 As shown, after the bending is completed, the bending assembly 201 retreats, and the workpiece rebounds to a free state. At this time, the monitoring system measures that the bending angle of the workpiece is 100°. At this time, the computer system operates the bending assembly 201 to further fit the clamping assembly 110, so that the bending assembly 201 is bent 80°, so that the angle at which the workpiece rebounds to a free state is 90°;

[0089] The thickness of each workpiece is 1mm, and the threshold of the clamping thickness of the clamping assembly 110 for the workpiece is 1.2mm. In actual detection, assuming that there are two workpieces superimposed, the monitoring system monitors 2mm, and if it exceeds the threshold of 1.2mm, an alarm is issued for excessive workpiece thickness.

[0090] The functions of each module in each device of the embodiment of the present utility model can refer to the corresponding description in the above method, which will not be repeated here.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0093] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A visual monitoring device for a bending center workpiece, characterized in that: include: A clamping assembly, which clamps the bent workpiece and is installed on the bending center; A light source assembly, wherein the light source assembly is mounted on one side of the clamping assembly, and the center of the light source of the light source assembly and the bending part of the workpiece are located on the same horizontal straight line; A projection assembly is installed on a side of the clamping assembly away from the light source assembly. The light source assembly illuminates the workpiece on the clamping assembly so that the side projection of the workpiece falls on the projection assembly. The bending angle of the workpiece is monitored by the angle of the projection of the workpiece on the projection assembly.

2. A bending center workpiece visual monitoring device according to claim 1, characterized in that: The clamping assembly comprises: A fixed upper knife, wherein the fixed upper knife is mounted on a slider at the bending center, and the fixed upper knife is driven to move up and down by the slider on the bending center; A fixed lower knife is installed on the bending center. The fixed lower knife and the fixed upper knife are located on the same straight line. The bent workpiece is clamped by the movement of the fixed upper knife and the fixed lower knife. The light source assembly and the projection assembly are respectively installed on both sides of the fixed lower knife.

3. A visual monitoring device for a bending center workpiece according to claim 2, characterized in that: The fixed upper knife and the fixed lower knife both have a tip. When the fixed upper knife and the fixed lower knife are closed, the tip of the fixed upper knife fits against the bending part of the bent workpiece.

4. A bending center workpiece visual monitoring device according to claim 2, characterized in that: The light source assembly comprises: An adjustment base, the adjustment base being mounted on one side of the fixed lower knife; A light source generator is mounted on the adjustment base, and the position of the light source generator is adjusted by the adjustment base so that the light source center of the light source generator and the bending point of the workpiece are located on the same horizontal line.

5. A bending center workpiece visual monitoring device according to claim 4, characterized in that: The adjustment base is connected with two groups of adjustment screws, and the adjustment screws are threadedly connected with the light source generator. The upper and lower heights and the pitch angles of the light source generator are adjusted by the adjustment screws.

6. A bending center workpiece visual monitoring device according to claim 4, characterized in that: Long strip-shaped holes are provided on both sides of the adjustment base. The adjustment base is laterally adjusted by changing the connection position between the holes and the fixed lower knife, so that the light source generator can be horizontally adjusted.

7. A bending center workpiece visual monitoring device according to claim 4, characterized in that: The projection assembly comprises: A projection screen, which is installed on a side of the fixed lower cutter away from the adjustment base, and the light source generator projects the projection of the bent workpiece onto the projection screen; A camera is installed on the fixed lower knife, and the camera takes pictures of the projection on the projection screen and transmits the taken images to a computer.

8. A visual monitoring device for a bending center workpiece according to claim 7, characterized in that: The shooting center of the camera and the shooting center of the projection screen are both located on a horizontal straight line between the light source emitter and the tip.

9. A bending center, characterized in that: include: A visual monitoring device for a bending center workpiece as described in any one of claims 1 to 8; as well as The bending assembly cooperates with the clamping assembly to bend the workpiece. When the monitoring device detects that the bending angle of the workpiece does not meet the requirements, the bending assembly performs compensatory bending on the workpiece to make the workpiece meet the bending standard.

10. A bending center according to claim 9, characterized in that: The bending component is provided with a recess that matches the shape of the tip of the clamping component. The bending angle of the workpiece is supplemented by the horizontal movement of the bending component toward the tip of the clamping component.

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