Workpiece positioning equipment and scanning system

Abstract

The utility model provides a workpiece positioning device and a scanning system. The workpiece positioning device comprises a workbench, a moving mechanism, a coordinate positioning assembly and a coordinate grating. The moving mechanism is installed on the workbench, and a coordinate positioning assembly is arranged on the moving mechanism and used for driving the coordinate positioning assembly to move to the position where the coordinate positioning assembly makes contact with a workpiece to be detected. And the coordinate grating is arranged on the moving mechanism and is used for positioning the to-be-measured workpiece in contact with the coordinate positioning assembly and forming a coordinate reference of the to-be-measured workpiece. According to the utility model, the coordinate positioning assembly is driven by the moving mechanism to move to the position in contact with the workpiece to be detected, and the coordinate grating is used for positioning, so that a plurality of photos do not need to be shot and spliced in the process, the precision loss caused by repeated splicing can be avoided, and the problem of large precision loss of three-dimensional data of the workpiece is well solved; the link of photographing to create a coordinate system is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece positioning, and in particular relates to a workpiece positioning device and a scanning system. Background Art

[0002] During the R&D and manufacturing process, many products require 3D scanning of their appearance and internal structure to obtain 3D data in their actual state for product benchmarking and design verification, such as large products such as automobiles and aircraft.

[0003] At present, due to the large range of 3D scanning of automobiles, it is necessary to paste coordinate points on the surface of the workpiece in advance, and then take photos of these coordinate points to create a coordinate system. The principle is to stitch multiple photos taken one by one into a complete coordinate system according to the coordinate points, but each stitching has a certain loss of accuracy; due to the large size of the automobile, many photos need to be taken and the number of stitching times is large, resulting in a large loss of accuracy in the stitching process, low accuracy of the created coordinate system, and inaccurate 3D data of the located workpiece. Utility Model Content

[0004] The utility model provides a workpiece positioning device and a scanning system to solve the problem that the prior art cannot accurately position the workpiece, resulting in a large loss in accuracy of the three-dimensional data collected.

[0005] A workpiece positioning device comprises a workbench, a moving mechanism, a coordinate positioning component and a coordinate grating;

[0006] The moving mechanism is mounted on the workbench, and a coordinate positioning assembly is provided on the moving mechanism, which is used to drive the coordinate positioning assembly to move to a position in contact with the workpiece to be measured;

[0007] The coordinate grating is arranged on the moving mechanism and is used to position the workpiece to be measured that is in contact with the coordinate positioning assembly.

[0008] Preferably, the moving mechanism comprises an X-direction moving component, a Y-direction moving component and a Z-direction moving component;

[0009] The X-direction moving components are arranged on both sides of the workbench along the X-axis direction;

[0010] The Y-direction moving component is arranged on the X-direction moving component along the Y-axis direction, and two coordinate positioning components are arranged on the Y-direction moving component;

[0011] The Z-direction moving component is arranged on the Y-direction moving component along the Z-axis direction, and the coordinate positioning component is arranged on the Z-direction moving component.

[0012] Preferably, the coordinate grating includes an X-axis grating, a Y-axis grating and a Z-axis grating;

[0013] The X-axis grating is arranged on the X-direction moving component, and is used to locate the X-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component;

[0014] The Y-axis grating is arranged on the Y-direction moving component, and is used to locate the Y-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component;

[0015] The Z-axis grating is arranged on the Z-direction moving component and is used to locate the Z-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component.

[0016] Preferably, the X-axis moving assembly comprises two first guide rails and two columns;

[0017] The two first guide rails are arranged on both sides of the workbench along the X-axis direction;

[0018] The first ends of the two columns are respectively slidably connected to the two first guide rails, and the second ends of the two columns are respectively connected to the two ends of the Y-direction moving assembly;

[0019] The X-axis grating is arranged on the first guide rail along the X-axis direction.

[0020] Preferably, the Y-axis moving assembly includes a second guide rail and a sliding member;

[0021] The second guide rail is arranged on the X-direction moving assembly along the Y-axis direction;

[0022] The sliding member is slidably connected to the second guide rail, and the sliding member is provided with the Z-direction moving component;

[0023] The Y-axis grating is arranged on the second guide rail along the Y-axis direction.

[0024] Preferably, the Y-axis moving component is provided with a slide groove arranged along the Z-axis direction;

[0025] The Z-direction moving assembly comprises a third slide rail, and the third slide rail is arranged in the slide groove;

[0026] The Z-axis grating is arranged on the third slide rail along the Z-axis direction.

[0027] Preferably, the coordinate positioning assembly comprises a coordinate positioning bracket, a support rod and a positioning block;

[0028] The coordinate positioning bracket is connected to the moving mechanism; a plurality of support rods are radially connected to the coordinate positioning bracket, and each support rod is provided with a positioning block;

[0029] The positioning block is used to contact the workpiece to be measured.

[0030] Preferably, the positioning block is a regular dodecahedron, and each face of the regular dodecahedron is inlaid with a first coordinate point for positioning;

[0031] The workbench is provided with a second coordinate point for constructing a coordinate reference, and the second coordinate point cooperates with the first coordinate point to position the workpiece to be measured.

[0032] A scanning system, comprising the workpiece positioning device and a scanner;

[0033] The scanner comprises a scanner body and a scanner tracker; the scanner body is used to scan a workpiece to be measured and obtain three-dimensional data of the workpiece to be measured; the scanner tracker is communicatively connected with the scanner body and is used to collect the three-dimensional data of the workpiece to be measured.

[0034] Preferably, the scanning system further comprises a controller;

[0035] The controller is connected to the moving mechanism of the workpiece positioning device and the scanner, and is used to control the operation of the moving mechanism and the scanner.

[0036] When the utility model performs three-dimensional scanning on the workpiece to be measured, in order to ensure the accuracy of the scanning data, a workpiece positioning device is required to accurately position the workpiece to be measured. The workpiece positioning device includes a workbench, a moving mechanism, a coordinate positioning component and a coordinate grating. The workbench adopts a cast iron platform, which is a carrier of the workpiece to be measured and also a carrier of the working coordinate system. The moving mechanism is installed on the workbench, and the coordinate positioning component is installed on the moving mechanism. The moving mechanism drives the coordinate positioning component to move to a position in contact with the workpiece to be measured. The coordinate grating is arranged on the moving mechanism, which can realize the positioning of the workpiece to be measured in contact with the coordinate positioning component, and is used to form a coordinate reference of the workpiece to be measured. When in use, the workpiece to be measured is placed on the workbench, and the position where the coordinate positioning component contacts the workpiece to be measured is adjusted by the moving mechanism. The coordinate grating locates the contact position, thereby realizing the accurate positioning of the position coordinates of the entire workpiece, so as to solve the problem that the workpiece cannot be accurately positioned when scanning the workpiece, resulting in the problem that the three-dimensional data of the workpiece to be measured is not accurate enough, so as to perform three-dimensional scanning on the shape and internal structure of the entire workpiece, so as to obtain accurate three-dimensional data in the actual state. In this example, the coordinate positioning component is driven by a moving mechanism to move to a position in contact with the workpiece to be measured, and the coordinate grating is used for positioning. The process does not require taking multiple photos and stitching them together, which can avoid the loss of accuracy caused by multiple stitching. It effectively solves the problem of large loss of accuracy in the three-dimensional data of the workpiece, saves the step of taking photos to create a coordinate system, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1It is a three-dimensional diagram of the workpiece positioning device in the utility model;

[0038] Figure 2 It is a stereogram of the coordinate positioning assembly in the utility model;

[0039] Figure 3 It is a three-dimensional diagram of the scanning system in the utility model.

[0040] in,

[0041] 1. Workbench;

[0042] 2. Moving mechanism; 21. X-direction moving assembly; 211. First guide rail; 212. Column; 22. Y-direction moving assembly; 221. Second guide rail; 222. Sliding member; 23. Z-direction moving assembly;

[0043] 3. Coordinate positioning assembly; 31. Coordinate positioning bracket; 32. Support rod; 33. Positioning block;

[0044] 4. Coordinate grating; 41. X-axis grating; 42. Y-axis grating; 43. Z-axis grating;

[0045] 5. The first coordinate point;

[0046] 6. The second coordinate point;

[0047] 7. Scanner; 71. Scanner body; 72. Scanner tracker;

[0048] 8. Controller. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of the present invention, "X direction / X axis", "Y direction / Y axis" and "Z direction / Z axis" mean the coordinate axis directions commonly understood when the workpiece to be measured is normally placed, that is, the X direction / X axis represents the length direction, the Y direction / Y axis represents the width direction, and the Z direction / Z axis represents the height direction.

[0053] The utility model embodiment provides a workpiece positioning device, referring to Figure 1-3 The workpiece positioning device includes a workbench 1, a moving mechanism 2, a coordinate positioning component 3 and a coordinate grating 4; the moving mechanism 2 is installed on the workbench 1, and the moving mechanism 2 is provided with a coordinate positioning component 3, which is used to drive the coordinate positioning component 3 to move to a position in contact with the workpiece to be measured; the coordinate grating 4 is arranged on the moving mechanism 2, and is used to position the workpiece to be measured that is in contact with the coordinate positioning component 3.

[0054] As an example, when a workpiece to be measured is scanned in three dimensions, in order to ensure the accuracy of the scanning data, a workpiece positioning device is required to accurately position the workpiece to be measured. The workpiece positioning device includes a workbench 1, a moving mechanism 2, a coordinate positioning component 3 and a coordinate grating 4. The workbench 1 adopts a cast iron platform, which is a carrier of the workpiece to be measured and a carrier of the working coordinate system. The moving mechanism 2 is installed on the workbench 1, and the coordinate positioning component 3 is installed on the moving mechanism 2. The moving mechanism 2 drives the coordinate positioning component 3 to move to a position in contact with the workpiece to be measured. The coordinate grating 4 is arranged on the moving mechanism 2, which can realize the positioning of the workpiece to be measured in contact with the coordinate positioning component 3, and is used to form a coordinate reference of the workpiece to be measured. When in use, the workpiece to be measured is placed on the workbench 1, and the position where the coordinate positioning component 3 contacts the workpiece to be measured is continuously adjusted by the moving mechanism 2. The coordinate grating 4 locates the contact position, thereby realizing the accurate positioning of the position coordinates of the entire workpiece, so as to solve the problem that the workpiece cannot be accurately positioned when scanning the workpiece, resulting in the problem that the three-dimensional data of the workpiece to be measured determined by it is not accurate enough. In this example, the coordinate positioning component 3 is driven by the moving mechanism 2 to move to the position in contact with the workpiece to be measured, and the coordinate grating 4 is used for positioning. The process does not require taking multiple photos and stitching them together, which can avoid the loss of accuracy caused by multiple stitching. It effectively solves the problem of large loss of accuracy of the workpiece's three-dimensional data, saves the step of taking photos to create a coordinate system, and improves work efficiency.

[0055] In one embodiment, referring to Figure 1 and Figure 3 The moving mechanism 2 includes an X-axis moving component 21, a Y-axis moving component 22 and a Z-axis moving component 23; the X-axis moving component 21 is arranged on both sides of the workbench 1 along the X-axis direction; the Y-axis moving component 22 is arranged on the X-axis moving component 21 along the Y-axis direction, and two coordinate positioning components 3 are arranged on the Y-axis moving component 22; the Z-axis moving component 23 is arranged on the Y-axis moving component 22 along the Z-axis direction, and a coordinate positioning component 3 is arranged on the Z-axis moving component 23.

[0056] As an example, the moving mechanism 2 includes an X-axis moving component 21, a Y-axis moving component 22 and a Z-axis moving component 23, wherein the X-axis moving component 21 is arranged on both sides of the workbench 1 along the X-axis direction, and can move back and forth along the X-axis direction to adjust the position of the coordinate positioning component 3 in the X-axis direction; the Y-axis moving component 22 is arranged on the X-axis moving component 21 along the Y-axis direction, and can move back and forth along the Y-axis direction to adjust the position of the coordinate positioning component 3 in the Y-axis direction; the Z-axis moving component 23 is arranged on the Y-axis moving component 22 along the Z-axis direction, and can move back and forth along the Z-axis direction to adjust the position of the coordinate positioning component 3 in the Z-axis direction. The three can cooperate to adjust the contact position of the coordinate positioning component 3 with the workpiece to be measured according to actual needs until the measurement requirements are met. Two coordinate positioning components 3 are provided on the Y-axis moving component 22 for determining the positioning area of ​​the workpiece to be measured. A coordinate positioning component 3 is provided on the Z-axis moving component 23 for determining the actual position of the workpiece to be measured. When in use, the coordinate positioning component 3 is moved to an appropriate position as needed to provide a scanning reference for positioning the workpiece to be measured, so as to achieve precise positioning of the position coordinates of the entire workpiece, so as to solve the problem that the workpiece cannot be accurately positioned when scanning the workpiece, resulting in inaccurate three-dimensional data of the workpiece to be measured, so as to perform a three-dimensional scan of the shape and internal structure of the entire workpiece, so as to obtain three-dimensional data in the actual state, and perform product benchmarking and design verification, etc.

[0057] In one embodiment, referring to Figure 1 and Figure 3 The coordinate grating 4 includes an X-axis grating 41, a Y-axis grating 42 and a Z-axis grating 43; the X-axis grating 41 is arranged on the X-direction moving component 21, and is used to locate the X-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3; the Y-axis grating 42 is arranged on the Y-direction moving component 22, and is used to locate the Y-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3; the Z-axis grating 43 is arranged on the Z-direction moving component 23, and is used to locate the Z-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3.

[0058] As an example, the coordinate grating 4 includes an X-axis grating 41, a Y-axis grating 42 and a Z-axis grating 43, wherein the X-axis grating 41 is arranged on the X-direction moving component 21, and locates the X-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3, so as to record the X-direction coordinate; the Y-axis grating 42 is arranged on the Y-direction moving component 22, and locates the Y-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3, so as to record the Y-direction coordinate; the Z-axis grating 43 is arranged on the Z-direction moving component 23, and locates the Z-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3, so as to record the Z-direction coordinate; the three can cooperate to accurately locate the position of the workpiece to be measured in contact with the coordinate positioning component 3, so as to solve the problem that the existing method of stitching multiple photos cannot accurately locate the workpiece, resulting in the problem that the three-dimensional data of the workpiece to be measured is not accurate enough.

[0059] In one embodiment, referring to Figure 1 and Figure 3 The X-axis moving component 21 includes two first guide rails 211 and two columns 212; the two first guide rails 211 are arranged on both sides of the workbench 1 along the X-axis direction; the first ends of the two columns 212 are respectively slidably connected to the two first guide rails 211, and the second ends of the two columns 212 are respectively connected to the two ends of the Y-axis moving component 22; the X-axis grating 41 is arranged on the first guide rails 211 along the X-axis direction.

[0060] As an example, the X-axis moving assembly 21 includes two first guide rails 211 and two columns 212. The two first guide rails 211 are arranged on both sides of the workbench 1 along the X-axis direction. The first ends of the two columns 212 are respectively slidably connected to the two first guide rails 211, and the second ends of the two columns 212 are respectively connected to the two ends of the Y-axis moving assembly 22. The column 212 moves along the X-axis on the first guide rail 211, and the position of the Y-axis moving assembly 22 in the X-axis can be adjusted, thereby adjusting the position of the coordinate positioning assembly 3. The X-axis grating 41 is arranged on the first guide rail 211 along the X-axis direction to locate the X-axis coordinate of the workpiece to be measured that contacts the coordinate positioning assembly 3, and is used to record the X-axis coordinate. In this example, the first guide rail 211 is a rectangular parallelepiped, and the column 212 is a rectangular parallelepiped, and its bottom is an inverted U-shaped structure. The inverted U-shaped structure matches the first guide rail 211, and the inverted U-shaped structure can make the column 212 slide in the first guide rail 211, thereby adjusting the position of the column 212.

[0061] In one embodiment, referring to Figure 1 and Figure 3 The Y-axis moving component 22 includes a second guide rail 221 and a sliding member 222; the second guide rail 221 is arranged on the X-axis moving component 21 along the Y-axis direction; the sliding member 222 is slidably connected to the second guide rail 221, and the Z-axis moving component 23 is arranged on the sliding member 222; the Y-axis grating 42 is arranged on the second guide rail 221 along the Y-axis direction.

[0062] As an example, the Y-axis moving component 22 includes a second guide rail 221 and a sliding member 222; the second guide rail 221 is a rectangular parallelepiped, which is arranged on two columns 212 along the Y-axis direction and spans the workbench 1; the sliding member 222 is a cubic structure, on which a Y-axis through groove is opened, and the sliding sleeve is mounted on the second guide rail 221. The sliding member 222 is provided with a Z-axis moving component 23, and the sliding member 222 moves along the Y-direction on the second guide rail 221, and the position of the Z-axis moving component 23 in the Y-direction can be adjusted, thereby adjusting the position of the coordinate positioning component 3. The Y-axis grating 42 is arranged on the second guide rail 221 along the Y-axis direction to locate the Y-axis coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3, so as to record the Y-axis coordinate.

[0063] In one embodiment, referring to Figure 1 and Figure 3 The Y-axis moving component 22 is provided with a slide groove arranged along the Z-axis direction; the Z-axis moving component 23 includes a third slide rail, and the third slide rail is inserted into the slide groove; the Z-axis grating 43 is arranged on the third slide rail along the Z-axis direction.

[0064] As an example, the Y-axis moving component 22 is provided with a slide groove arranged along the Z-axis direction, and the Z-axis moving component 23 includes a third slide rail; a slide groove arranged along the Z-axis direction is provided on the sliding member 222 of the Y-axis moving component 22, and the third slide rail is a rectangular parallelepiped. The third slide rail is inserted into the slide groove, and the position of the third slide rail in the Z direction can be adjusted, thereby adjusting the position of the coordinate positioning component 3. The Z-axis grating 43 is arranged on the third slide rail along the Z-axis direction to locate the Z-axis coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3, so as to record the Z-axis coordinate.

[0065] In one embodiment, referring to Figure 2 The coordinate positioning assembly 3 includes a coordinate positioning bracket 31, a support rod 32 and a positioning block 33; the coordinate positioning bracket 31 is connected to the moving mechanism 2; a plurality of support rods 32 are radially connected to the coordinate positioning bracket 31, and each support rod 32 is provided with a positioning block 33; the positioning block 33 is used to contact the workpiece to be measured.

[0066] As an example, the coordinate positioning assembly 3 includes a coordinate positioning bracket 31, a support rod 32 and a positioning block 33. The coordinate positioning bracket 31 serves as a connecting piece for connecting to the moving mechanism 2. Multiple support rods 32 are radially connected to the coordinate positioning bracket 31 for installing the positioning block 33. The positioning block 33 is used to contact the workpiece to be measured. In this way, no matter what shape the workpiece to be measured is, the positioning block 33 in the coordinate positioning assembly 3 can effectively contact the workpiece to be measured, thereby ensuring that the position of the workpiece to be measured can be accurately positioned, thereby improving the applicability of the coordinate positioning assembly 3.

[0067] In one embodiment, referring to Figure 1 and Figure 2 The positioning block 33 is a regular dodecahedron, and each face of the regular dodecahedron is inlaid with a first coordinate point 5 for positioning; the workbench 1 is provided with a second coordinate point 6 for constructing a coordinate reference, and the second coordinate point 6 cooperates with the first coordinate point 5 to position the workpiece to be measured.

[0068] As an example, the positioning block 33 is a regular dodecahedron. In this way, no matter what shape the workpiece to be measured is, the positioning block 33 in the coordinate positioning component 3 can effectively contact the workpiece to be measured; each face of the regular dodecahedron is inlaid with a first coordinate point 5 for positioning, and the workbench 1 is provided with a second coordinate point 6 for constructing a coordinate reference. The second coordinate point 6 cooperates with the first coordinate point 5 to position the workpiece to be measured. The first coordinate point 5 in this example is a circular sheet structure, which can accurately reflect the position coordinate value of the workpiece to be measured and obtain the workpiece coordinate system W1. These coordinate values ​​are converted and aligned with the second coordinate point 6 to ensure that no matter where the coordinate positioning component 3 is moved, its workpiece coordinate system W1 is always consistent with the second coordinate point 6, providing accurate coordinates for scanning the workpiece to be measured. In this example, the first coordinate point 5 is used in small quantities and is reused, which can reduce certain consumable costs.

[0069] The utility model embodiment provides a scanning system, referring to Figure 1 and Figure 3 , including a workpiece positioning device and a scanner 7; the scanner 7 includes a scanner body 71 and a scanner tracker 72; the scanner body 71 is used to scan the workpiece to be measured and obtain the three-dimensional data of the workpiece to be measured; the scanner tracker 72 is communicated with the scanner body 71 and is used to collect the coordinate reference of the three-dimensional data of the workpiece to be measured.

[0070] As an example, the scanning system includes a workpiece positioning device and a scanner 7, and the scanner 7 includes a scanner body 71 and a scanner tracker 72. When in use, the workpiece to be measured is placed on the workbench 1, and the X-direction moving component 21 is arranged on both sides of the workbench 1 along the X-axis direction, and can move back and forth along the X-axis direction to adjust the position of the coordinate positioning component 3 in the X-direction; the Y-direction moving component 22 is arranged on the X-direction moving component 21 along the Y-axis direction, and can move back and forth along the Y-axis direction to adjust the position of the coordinate positioning component 3 in the Y-direction; the Z-direction moving component 23 is arranged on the Y-direction moving component 22 along the Z-axis direction, and can move back and forth along the Z-axis direction to adjust the position of the coordinate positioning component 3 in the Z-direction. The three can cooperate to adjust the contact position of the coordinate positioning component 3 with the workpiece to be measured according to actual needs until the measurement requirements are met. Two coordinate positioning components 3 are provided on the Y-direction moving component 22 for determining the positioning area of ​​the workpiece to be measured. A coordinate positioning component 3 is provided on the Z-direction moving component 23 for determining the actual position of the workpiece to be measured. An X-axis grating 41 is arranged on the X-direction moving component 21 for locating the X-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3; a Y-axis grating 42 is arranged on the Y-direction moving component 22 for locating the Y-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3; a Z-axis grating 43 is arranged on the Z-direction moving component 23 for locating the Z-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component 3. The coordinate positioning component 3 can accurately reflect the position coordinate value of the workpiece to be measured and obtain the workpiece coordinate system W1. These coordinate values ​​are converted and aligned with the second coordinate point 6 to ensure that no matter where the coordinate positioning component 3 is moved, its workpiece coordinate system W1 is always consistent with the second coordinate point 6, thereby providing precise coordinates for scanning the workpiece to be measured. The scanner body 71 is used to scan the workpiece to be measured and obtain the three-dimensional data of the workpiece to be measured; the scanner tracker 72 is connected to the scanner body 71 for communication and is used to collect the coordinate reference of the three-dimensional data of the workpiece to be measured. Among them, the coordinate positioning component 3 is moved to an appropriate position as needed to provide a scanning reference for positioning the workpiece to be measured, so as to achieve accurate positioning of the position coordinates of the entire workpiece, so as to solve the problem that the workpiece cannot be accurately positioned when scanning the workpiece, resulting in the three-dimensional data of the workpiece to be measured not being accurate enough, so as to perform a three-dimensional scan of the shape and internal structure of the entire workpiece, and obtain the three-dimensional data in the actual state, which is used for product benchmarking, design verification, etc.; it avoids the accuracy loss of multiple splicing in the process of creating a coordinate system by the existing method, and well solves the problem of large accuracy loss of the three-dimensional data of the workpiece, saves the link of taking pictures to create a coordinate system, and improves work efficiency.

[0071] In this example, the coordinate positioning component 3 is moved to an appropriate position as needed as a reference for the scanner tracker 72. The coordinate value of the first coordinate point 5 on the coordinate positioning component 3 is recorded by the coordinate grating 4, and is aligned with the second coordinate point 6 after conversion, ensuring that no matter where the coordinate positioning component 3 is moved, its workpiece coordinate system W1 is always consistent with the second coordinate point 6, providing accurate coordinates for scanning the workpiece to be measured, and serving as a reference for the scanner 7 to perform scanning work. After completing the scanning at the current position, it is moved to other positions as a reference until the scanning of the entire workpiece is completed.

[0072] For example, in the process of automobile research and development and manufacturing, it is necessary to perform three-dimensional scanning on the appearance and internal structure of the automobile to obtain three-dimensional data in the actual state, which is used for vehicle benchmarking, design verification, etc., which is an indispensable task. At present, due to the large range, the three-dimensional scanning of large workpieces such as automobiles requires the coordinate points to be pasted on the surface of the workpiece in advance, and then the coordinate points are photographed to create a coordinate system. The principle is to splice multiple photos taken one by one into a complete coordinate system according to the coordinate points, but each splicing has a certain loss of accuracy. Due to the large range of large workpieces, many photos need to be taken and the number of splicing times is large. Therefore, the precision loss of its splicing process is large, and the accuracy of the created coordinate system is low, which has become a major pain point in the industry. The scanning system in this embodiment uses a mobile mechanism 2 with a coordinate positioning component 3 to create a coordinate system, which avoids multiple splicing in the process of creating a coordinate system, and solves the problem of large precision loss of the three-dimensional data of the workpiece. It has good effects in improving the research and development and manufacturing level of large workpieces (such as automobiles, aircraft, etc.), improving the product manufacturing quality level, and controlling costs; and the structure is novel and unique, has good applicability, is convenient to use and has high precision, and is very suitable for promotion and application.

[0073] In this embodiment, the working process of the scanning system is as follows: first, the workpiece to be measured is placed on the workbench 1 to obtain the scanning area; then the X-direction moving component 21 is controlled to move, driving the coordinate positioning component 3 to move along the X direction, and obtaining the X-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3; the Y-direction moving component 22 is controlled to move, driving the coordinate positioning component 3 to move along the Y direction, and obtaining the Y-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3; the Z-direction moving component 23 is controlled to move, driving the coordinate positioning component 3 to move along the Z direction, and obtaining the Z-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3; then, according to the X-direction coordinate, Y-direction coordinate and Z-direction coordinate of the workpiece to be measured in contact with the coordinate positioning component 3, the scanning reference benchmark is obtained; the scanner tracker 72 is connected to the scanner body 71 for collecting the coordinate benchmark of the three-dimensional data of the workpiece to be measured, and the scanner body 71 is used to scan the workpiece to be measured in the scanning area to obtain the three-dimensional data of the workpiece to be measured; after completing the scanning of the workpiece to be measured in the scanning area, the coordinate positioning component 3 is moved to a new position according to the above steps to scan the new area until the scanning of all areas of the workpiece to be measured is completed.

[0074] In one embodiment, referring to Figure 3 The scanning system also includes a controller 8; the controller 8 is connected to the moving mechanism 2 and the scanner 7 of the workpiece positioning device, and is used to control the moving mechanism 2 and the scanner 7 to work.

[0075] As an example, the scanning system also includes a controller 8; the scanner tracker 72 and the moving mechanism 2 of the workpiece positioning device are both connected to the controller 8. When the moving mechanism 2 drives the coordinate positioning component 3 to move, the coordinate grating 4 will record the coordinate value and then transmit it to the controller 8. The controller 8 performs algorithm calculation and data processing, and can align the coordinate value of the coordinate point on the coordinate positioning component 3 with the second coordinate point 6 after conversion, ensuring that no matter where the coordinate positioning component 3 is moved to, its workpiece coordinate system W1 is always consistent with the second coordinate point 6, providing precise coordinates for scanning the workpiece to be measured, serving as a reference base for the scanner tracker 72, and providing a reference for the scanner body 71 to scan the workpiece to be measured.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A workpiece positioning device, characterized in that: It includes a workbench, a moving mechanism, a coordinate positioning component and a coordinate grating; The moving mechanism is mounted on the workbench, and a coordinate positioning assembly is provided on the moving mechanism, which is used to drive the coordinate positioning assembly to move to a position in contact with the workpiece to be measured; The coordinate grating is arranged on the moving mechanism and is used to position the workpiece to be measured that is in contact with the coordinate positioning component.

2. The workpiece positioning device according to claim 1, characterized in that: The moving mechanism includes an X-direction moving component, a Y-direction moving component and a Z-direction moving component; The X-direction moving components are arranged on both sides of the workbench along the X-axis direction; The Y-direction moving component is arranged on the X-direction moving component along the Y-axis direction, and two coordinate positioning components are arranged on the Y-direction moving component; The Z-direction moving component is arranged on the Y-direction moving component along the Z-axis direction, and the coordinate positioning component is provided on the Z-direction moving component.

3. The workpiece positioning device according to claim 2, characterized in that: The coordinate grating includes an X-axis grating, a Y-axis grating and a Z-axis grating; The X-axis grating is arranged on the X-direction moving component, and is used to locate the X-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component; The Y-axis grating is arranged on the Y-direction moving component, and is used to locate the Y-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component; The Z-axis grating is arranged on the Z-direction moving component and is used to locate the Z-direction coordinate of the workpiece to be measured that is in contact with the coordinate positioning component.

4. The workpiece positioning device according to claim 3, characterized in that: The X-axis moving assembly includes two first guide rails and two columns; The two first guide rails are arranged on both sides of the workbench along the X-axis direction; The first ends of the two columns are respectively slidably connected to the two first guide rails, and the second ends of the two columns are respectively connected to the two ends of the Y-direction moving assembly; The X-axis grating is arranged on the first guide rail along the X-axis direction.

5. The workpiece positioning device according to claim 3, characterized in that: The Y-axis moving assembly includes a second guide rail and a sliding member; The second guide rail is arranged on the X-direction moving assembly along the Y-axis direction; The sliding member is slidably connected to the second guide rail, and the sliding member is provided with the Z-direction moving component; The Y-axis grating is arranged on the second guide rail along the Y-axis direction.

6. The workpiece positioning device according to claim 3, characterized in that: The Y-axis moving component is provided with a slide groove arranged along the Z-axis direction; The Z-direction moving assembly comprises a third slide rail, and the third slide rail is arranged in the slide groove; The Z-axis grating is arranged on the third slide rail along the Z-axis direction.

7. The workpiece positioning device according to claim 1, characterized in that: The coordinate positioning assembly includes a coordinate positioning bracket, a support rod and a positioning block; The coordinate positioning bracket is connected to the moving mechanism; a plurality of support rods are radially connected to the coordinate positioning bracket, and each support rod is provided with a positioning block; The positioning block is used to contact the workpiece to be measured.

8. The workpiece positioning device according to claim 7, characterized in that: The positioning block is a regular dodecahedron, and each face of the regular dodecahedron is inlaid with a first coordinate point for positioning; The workbench is provided with a second coordinate point for constructing a coordinate reference, and the second coordinate point cooperates with the first coordinate point to position the workpiece to be measured.

9. A scanning system, characterized in that: A workpiece positioning device and a scanner comprising any one of claims 1 to 8; The scanner comprises a scanner body and a scanner tracker; the scanner body is used to scan a workpiece to be measured and obtain three-dimensional data of the workpiece to be measured; the scanner tracker is communicatively connected with the scanner body and is used to collect the three-dimensional data of the workpiece to be measured.

10. The scanning system according to claim 9, characterized in that: The scanning system also includes a controller; The controller is connected to the moving mechanism of the workpiece positioning device and the scanner, and is used to control the operation of the moving mechanism and the scanner.

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