Inner and outer contour measuring device

Abstract

The invention discloses an inner and outer contour measuring device, which relates to the technical field of measuring devices and comprises a cradle assembly, a Y-axis sliding table, an outer contour measuring assembly, a first Z-axis sliding table, an X-axis sliding table, an inner contour measuring assembly and a second Z-axis sliding table. The cradle assembly comprises a product clamping assembly, a cradle body, a cradle support and a cradle driving device. The Y-axis sliding table is used for driving the cradle base to slide in the Y-axis direction. The outer contour measuring assembly is used for measuring the outer contour of the product. The first Z-axis sliding table is used for driving the outer contour measuring assembly to slide in the Z-axis direction, and the X-axis sliding table is used for driving the first Z-axis sliding table to slide in the X-axis direction. The inner contour measuring assembly comprises a climbing needle sensor which is used for measuring the inner contour of the product. The second Z-axis sliding table is connected with the inner contour measuring assembly and used for driving the inner contour measuring assembly to slide in the Z-axis direction. According to the device, measurement of the inner contour and the outer contour is completed through one-time clamping, equipment replacement is avoided, and a structural basis is provided for subsequent data fusion.

Description

Technical Field

[0001] This invention relates to the field of measuring device technology, and in particular to a device for measuring internal and external contours. Background Technology

[0002] Contour measurement of mechanical products is a common measurement task. Typically, the external contour measurement of small parts can be accomplished using various methods such as coordinate measuring machines (CMMs), image measuring instruments, and 3D scanners, while the internal contour measurement often employs CMMs, contour measuring instruments, and transmission scanning instruments such as CT scanners. Measuring the internal and external contours of a single part usually requires several different pieces of equipment. Therefore, the measurement of internal and external contours not only necessitates different equipment but also often requires multiple clamping operations. This directly leads to low measurement efficiency and makes it difficult to achieve automated correlation measurement based on data from different equipment, thus hindering high-speed batch automated inspection or full inspection on production lines or line edges. Summary of the Invention

[0003] The purpose of this invention is to provide an inner and outer contour measuring device to solve the problems existing in the above-mentioned related technologies. It can complete the measurement of inner and outer contours in one clamping, providing a structural basis for the subsequent correlation of inner and outer contour data and avoiding the need to replace equipment.

[0004] To achieve the above objectives, the present invention provides the following solution: This invention discloses an inner and outer contour measuring device, comprising: A cradle assembly includes a product clamping assembly, a cradle body, a cradle support, and a cradle drive device; the product clamping assembly is used to clamp a product and is fixed to the cradle body; the cradle body is rotatably mounted on the cradle support, with the rotation axis in the X-axis direction; the cradle drive device is used to drive the cradle body to rotate. The Y-axis slide is connected to the cradle support and is used to drive the cradle support to slide along the Y-axis direction; External contour measurement component, used to measure the external contour of a product; Z-axis slide one, connected to the outer contour measuring component, is used to drive the outer contour measuring component to slide along the Z-axis direction; The X-axis slide is connected to the Z-axis slide and is used to drive the Z-axis slide to slide along the X-axis direction. An inner contour measuring assembly includes a needle-climbing sensor for measuring the inner contour of a product; The second Z-axis slide is connected to the inner contour measuring component and is used to drive the inner contour measuring component to slide along the Z-axis direction.

[0005] In some examples, the inner and outer contour measuring device further includes a worktable, a bellows cover, and a baffle; the Y-axis slide, the X-axis slide, and the Z-axis slide are all fixed to the worktable; one end of the bellows cover is connected to the slider of the Y-axis slide, and the other end is connected to the worktable, and the bellows cover is located above the lead screw of the Y-axis slide; the baffle is fixedly connected to the worktable, and the baffle is located above the bellows cover and at least partially covers the bellows cover.

[0006] In some examples, the cradle support is fixed with a lower light source for illuminating the product from below; the cradle body has a through groove facing the product to allow light from the lower light source to pass through.

[0007] In some examples, the product clamping assembly is used to apply a compressive force along the X-axis to press the product onto the cradle body; a positioning block is fixed on the product clamping assembly, the positioning block having a positioning surface one and a positioning surface two; the positioning surface one is used to position the radially inner end of the product relative to the rotation axis of the cradle body, and the positioning surface two is used to position the circumferential end of the product relative to the rotation axis of the cradle body.

[0008] In some examples, the product clamping assembly includes a vertical plate, a bolt, a shaped nut, a spring, a slider, and a fixing block; the vertical plate is fixedly connected to the cradle body; when the bolt is horizontal, it slides through the vertical plate along the Y-axis and is threadedly connected to the shaped nut; the bolt head and the shaped nut are located on opposite sides of the vertical plate; the spring is sleeved on the outside of the bolt and located between the bolt head and the vertical plate; the shaped nut and the slider are slidably connected through an oblique dovetail groove or an oblique T-groove to push the slider to slide along the X-axis; when the slider slides along the X-axis, it can press the product firmly onto the cradle body; the fixing block is fixedly connected to the vertical plate and located on the side of the shaped nut away from the slider, for sliding connection of the shaped nut.

[0009] In some examples, the cradle body includes a base plate, end plates, right-angle limiting blocks, pads, a length-direction pressing assembly, and a width-direction pressing assembly; two end plates are vertically fixed to both ends of the base plate and are positioned opposite each other; the end plates are rotatably connected to the cradle support about an axis along the X-axis, and the end plates are drively connected to the cradle drive device; four right-angle limiting blocks are fixed to the same side surface of the base plate and are respectively located at the four right angles of the same rectangle; the pads are located inside the four right-angle limiting blocks and are used for contact and positioning with the right-angle limiting blocks; the length-direction pressing assembly is connected to the base plate and is used to press the pads along the length direction of the base plate; the width-direction pressing assembly is connected to the base plate and is used to press the pads along the width direction of the base plate.

[0010] In some examples, the wall of the through groove has a recessed portion for accommodating the spring or product.

[0011] In some examples, the outer contour measurement component includes a 2D sensor module and an upper light source; the 2D sensor module is fixedly connected to the slider of the Z-axis slide, the camera of the 2D sensor module is located above the product, and the upper light source is located between the 2D sensor module and the product and moves synchronously with the 2D sensor module.

[0012] In some examples, the outer contour measurement assembly includes a 3D sensor module fixedly connected to the slider of the Z-axis slide, with the laser scanning head of the 3D sensor module facing the product.

[0013] In some examples, there are multiple product clamping components to clamp multiple products onto the cradle body; and there are multiple crawling needle sensors to simultaneously measure the inner contour of multiple products.

[0014] Compared with related technologies, the present invention achieves the following technical effects: The Y-axis slide moves the cradle support along the Y-axis to adjust the product's horizontal position, thus moving the product to the measurement position of either the outer or inner contour measuring component. Then, the X-axis and Z-axis slides adjust the relative position of the outer contour measuring component and the product, while the Z-axis slide adjusts the relative position of the inner contour measuring component and the product. Next, using the product clamping assembly as a unified calibration reference, the coordinate system for both inner and outer contour measurements is calibrated, after which inner and outer contour measurements can be performed. During the measurement process, the cradle drive device can rotate the cradle body to adjust the product's angle, thereby measuring the outer and inner contours of different surfaces of the product, reducing the number of clamping operations, minimizing clamping errors, and shortening the measurement cycle.

[0015] The product clamping assembly can provide a unified calibration benchmark for both internal and external contour measurements, such as a hole on the assembly. Since the calibration benchmarks for internal and external contour measurements are the same, i.e., they share a common spatial coordinate system, this invention, compared to existing technologies that require two separate sets of equipment for internal and external contour measurements and cannot automatically correlate them, allows for simultaneous internal and external contour measurements with a single set of equipment by adjusting the relative positions of the product and the external contour measuring assembly, as well as the product and the internal contour assembly, through rotation and translation operations. Furthermore, the internal and external contour measurements can use the same measurement benchmark, and the data obtained can be directly correlated in a computer based on this same benchmark. This facilitates the fusion of internal and external contour data through calculation, enabling rapid and accurate modeling and automated correlation measurement based on data from different equipment. The measurement results of this internal and external contour measuring device can be used for evaluation requiring both internal and external contour data. Combined with an automatic loading and unloading system, it can achieve fully automated measurement for high-speed, batch production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram showing the omission of the 3D sensor module in some examples of the inner and outer contour measuring device of the present invention; Figure 2 A schematic diagram of the cradle assembly from a perspective omitting the cradle drive mechanism; Figure 3 A schematic diagram of the combined structure of the pad, product clamping components, and product; Figure 4 A schematic diagram of the compression component pushing the pad in the width direction; Figure 5 This is a schematic diagram of the pad block; Figure 6 An exploded view of the product clamping components; In the diagram: 100-Internal and external contour measuring device; 1-Cradle assembly; 2-Y-axis slide; 3-External contour measuring assembly; 4-Z-axis slide one; 5-Internal contour measuring assembly; 6-Z-axis slide two; 7-Worktable; 8-Product; 9-X-axis slide; 11-Product clamping assembly; 12-Cradle body; 13-Cradle support; 14-Cradle drive device; 111-Upright plate; 112-Bolt; 113-Irregular nut; 114-Spring; 115-Slider; 116-Fixing block; 117-Positioning block; 1171-Fixing block; Surface 1; 1172-Positioning Surface 2; 121-Base Plate; 122-End Plate; 123-Right Angle Limiting Block; 124-Pad Block; 125-Length Direction Pressing Assembly; 126-Width Direction Pressing Assembly; 1241-Through Groove; 1242-Recessed Part; 131 Lower Light Source; 31-2D Sensor Module; 32-Upper Light Source; 33-3D Sensor Module; 51-Climbing Needle Sensor; 52-Measuring End; 71-Bell Cover 1; 72-Baffle; 91-Bell Cover 2; A-Radial Inner End; B-Circumferential End. Detailed Implementation

[0018] 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.

[0019] The purpose of this invention is to provide an inner and outer contour measuring device to solve the problems existing in the above-mentioned related technologies. It can complete the measurement of inner and outer contours in one clamping, providing a structural basis for the subsequent correlation of inner and outer contour data and avoiding the need to replace equipment.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-6 This embodiment provides an inner and outer contour measuring device 100, including a cradle assembly 1, a Y-axis slide 2, an outer contour measuring assembly 3, a Z-axis slide 4, an inner contour measuring assembly 5, a Z-axis slide 6, and an X-axis slide 9.

[0022] The cradle assembly 1 includes a product clamping assembly 11, a cradle body 12, a cradle support 13, and a cradle drive device 14. The product clamping assembly 11 is used to clamp the product 8 and is fixed to the cradle body 12. The cradle body 12 is rotatably mounted on the cradle support 13, with its rotation axis in the X-axis direction. The cradle drive device 14 drives the cradle body 12 to rotate. The Y-axis slide 2 is connected to the cradle support 13 and is used to drive the cradle base to slide along the Y-axis direction. The outer contour measuring assembly 3 is used to measure the outer contour of the product 8. The Z-axis slide 4 is connected to the outer contour measuring assembly 3 and is used to drive the outer contour measuring assembly 3 to slide along the Z-axis direction. The X-axis slide 9 is connected to the Z-axis slide 4 and is used to drive the Z-axis slide 4 to slide along the X-axis direction, thereby causing the outer contour measuring assembly 3 to slide along the X-axis direction. The inner contour measuring assembly 5 includes a needle-climbing sensor 51, which is used to measure the inner contour of the product 8. The Z-axis slide 6 is connected to the inner contour measuring component 5 and is used to drive the inner contour measuring component 5 to slide along the Z-axis direction.

[0023] The working principle of the inner and outer contour measuring device 100 in this embodiment is as follows: Reference Figure 1 The X-axis and Y-axis are two mutually perpendicular horizontal directions, and the Z-axis is a vertical direction. The Y-axis slide 2 adjusts the horizontal position of the product 8 by moving the cradle support 13 along the Y-axis, thereby moving the product 8 to the measurement position of the outer contour measuring component 3 and the inner contour measuring component 5. Then, the relative position of the outer contour measuring component 3 and the product 8 is adjusted by the X-axis slide 9 and Z-axis slide 14, and the relative position of the inner contour measuring component 5 and the product 8 is adjusted by Z-axis slide 26. Next, using the product clamping assembly as a unified calibration reference, the coordinate system for inner and outer contour measurements is calibrated, after which subsequent outer or inner contour measurements can be performed. During the measurement process, the cradle drive device 14 drives the cradle body 12 to rotate, and the cradle support 13 supports the cradle and the cradle drive device 14, thereby measuring the outer and inner contours of different surfaces of the product 8.

[0024] Product clamping assembly 11 can provide a unified calibration reference for both inner and outer contour measurements, such as a hole on the product clamping assembly 11. Since the calibration references for inner and outer contour measurements are the same, i.e., they share a common spatial coordinate system, compared to existing technologies that require two separate sets of equipment for inner and outer contour measurements and cannot automatically correlate inner and outer contours, this embodiment uses rotation, translation, and other operations to adjust the relative positions of product 8 and outer contour measuring assembly 3, as well as the relative positions of product 8 and inner contour assembly 5, enabling a single set of equipment to simultaneously perform inner and outer contour measurements. Furthermore, the inner and outer contour measurements can use the same measurement reference, and the measured data can be directly correlated in a computer based on this same measurement reference. This facilitates the fusion of inner and outer contour data through calculation, enabling rapid and accurate modeling and achieving automated correlation measurement based on measurement data from different equipment.

[0025] In the above process, the inner contour measuring component 5 only needs to move along the Z-axis to the test hole groove of the product 8. Then, the relative horizontal movement of the measuring end of the inner contour measuring component 5 with respect to the test hole groove of the product 8 is achieved by the movement of the cradle support 13 and the product 8 along the Y-axis direction by the Y-axis slide 2.

[0026] The inner contour measuring component 5 itself does not have a device for displacing the needle crawling sensor 51. The relative displacement between the product 8 and the needle crawling sensor 51 along the Y-axis direction is achieved by sliding the product 8 along the Y-axis direction using the Y-axis slide 2. This configuration simplifies the internal structure of the inner contour measuring component 5 and is more suitable for multi-needle parallel applications.

[0027] In some examples, the internal and external contour measuring device 100 also includes a worktable 7, a bellows cover 71, and a baffle 72. The Y-axis slide 2, X-axis slide 9, Z-axis slide 4, and Z-axis slide 6 are all fixed to the worktable 7. One end of the bellows cover 71 is connected to the slider of the Y-axis slide 2, and the other end is connected to the worktable 7. The bellows cover 71 is located above the lead screw of the Y-axis slide 2. The baffle 72 is fixedly connected to the worktable 7, and is located above the bellows cover 71 and at least partially covers the bellows cover 71.

[0028] The worktable 7 provides a stable mounting base for the Y-axis slide 2, Z-axis slide 4, and Z-axis slide 6. Its structural stability ensures the positioning accuracy of each slide during operation and prevents vibration from interfering with the measurement results. The bellows cover 71, connected to the slider of the Y-axis slide 2 and the worktable 7 at both ends, extends and retracts synchronously with the slider, completely shielding the lead screw below. This effectively prevents dust, iron filings, coolant, and other impurities from entering the lead screw clearance, reducing component wear, lowering the failure rate, and extending the lead screw's service life. The baffle 72 provides secondary protection above the bellows cover 71, preventing deformation from external impacts and ensuring its flexible extension and retraction.

[0029] Similarly, an accordion cover 91 is installed on the X-axis slide 9. One end of the accordion cover 91 is connected to the slider of the X-axis slide 9, and the other end is connected to the base of the X-axis slide 9, thereby shielding the lead screw of the X-axis slide 9, effectively preventing dust, iron filings, coolant and other impurities from entering the lead screw clearance, reducing component wear and failure rate, and extending the service life of the lead screw.

[0030] In some examples, the cradle support 13 is fixed with a lower light source 131, which is used to illuminate the product 8 from below. The cradle body 12 is provided with a through groove 1241 facing the product 8 to allow light from the lower light source 131 to pass through.

[0031] The light emitted by the lower light source 131 passes through the through slot 1241 and illuminates the product 8, which serves as supplementary lighting and improves the measurement accuracy of the outer contour measurement component 3 when using visual recognition measurement.

[0032] In some examples, the product clamping assembly 11 applies a compressive force along the X-axis to the product 8, pressing the product 8 firmly onto the cradle body 12. Two positioning blocks 117 are fixed to the product clamping assembly 11, each having a positioning surface 1171 and a positioning surface 1172. Positioning surface 1171 positions the radially inner end A of the product 8 relative to the axis of rotation of the cradle body 12 (extending in the X-axis direction), and positioning surface 1172 positions the circumferential end B of the product 8 relative to the axis of rotation of the cradle body 12. For ease of understanding, the radial and circumferential directions are defined with the axis of rotation of the cradle body 12 as the center. Figure 6 The markings are shown in the middle.

[0033] The two positioning blocks 117 can be set with different mounting positions, that is, the pad block 124 is provided with multiple mounting holes for the positioning blocks 117 to accommodate products 8 of different sizes.

[0034] In some examples, the product clamping assembly 11 includes a vertical plate 111, a bolt 112, a shaped nut 113, a spring 114, a slider 115, and a fixing block 116. The vertical plate 111 is fixedly connected to the cradle body 12. When the bolt 112 is horizontal, it slides through the vertical plate 111 along the Y-axis and is threadedly connected to the shaped nut 113. The threaded head of the bolt 112 and the shaped nut 113 are located on opposite sides of the vertical plate 111. The spring 114 is sleeved on the outside of the bolt 112 and is located between the threaded head of the bolt 112 and the vertical plate 111. The shaped nut 113 and the slider 115 are slidably connected by an oblique dovetail groove or an oblique T-slot to push the slider 115 to slide along the X-axis (i.e., the length direction of the cradle body 12). When the slider 115 slides along the X-axis, it can press the product 8 onto the cradle body 12. The fixing block 116 is fixedly connected to the upright plate 111 and is located on the side of the irregular nut 113 away from the slider 115, for sliding connection of the irregular nut 113.

[0035] The rotation axis of the product clamping assembly 11 extends in the X-axis direction, and the upright plate 111 is perpendicular to the X-axis direction. When the screw head of the bolt 112 is rotated, the side of the shaped nut 113 away from the slider 115 is in contact with the fixing block 116, and the contact surface is a vertical surface perpendicular to the X-axis direction. This contact limit ensures that the shaped nut 113 can only translate along the width direction of the cradle body 12 and cannot rotate. When the bolt 112 is horizontal, the extension direction of the oblique dovetail groove or oblique T-slot is parallel to the horizontal plane. Since the slider 115 is slidably installed on the cradle body 12 along the length direction of the cradle body 12, when the shaped nut 113 translates along the width direction of the cradle body 12, the sliding fit between the dovetail block and the dovetail groove or the sliding fit between the T-block and the T-slot realizes the pushing or pulling of the slider 115 along the X-axis direction, thereby pressing the product 8 against the cradle body 12. After being tightened, the cradle body 12 can be rotated, causing the product 8 to rotate as well.

[0036] It is understandable that the fixing block 116 and the irregular nut 113 can also be slidably connected by a dovetail groove or a T-groove, with the extension direction parallel to the extension direction of the bolt 112.

[0037] In some examples, the cradle body 12 includes a base plate 121, end plates 122, right-angle limiting blocks 123, pads 124, a length-direction pressing assembly 125, and a width-direction pressing assembly 126. Two end plates 122 are vertically fixed to both ends of the base plate 121 and are positioned opposite each other. The end plates 122 are rotatably connected to the cradle support 13 about an axis along the X-axis, and are drively connected to the cradle drive device 14. Four right-angle limiting blocks 123 are fixed to the same side surface of the base plate 121 and are located at the four right angles of the same rectangle. The pads 124 are located inside the four right-angle limiting blocks 123 and are used for contact positioning with the right-angle limiting blocks 123. The length-direction pressing assembly 125 is connected to the base plate 121 and is used to press the pads 124 along the length direction (i.e., the X-axis direction) of the base plate 121. The width-direction pressing assembly 126 is connected to the base plate 121 and is used to press the pad 124 along the width direction of the base plate 121.

[0038] The base plate 121 and the pad 124 are positioned along their length (X-axis) and width (Y-axis) when horizontal. During installation before contour measurement, the pad 124 is first positioned along its length (X-axis) using the length clamping assembly 125, and then positioned along its width (Y-axis when horizontal) using the width clamping assembly 126. Afterward, the product 8 is positioned along the length of the base plate 121 (X-axis) by rotating the bolt 112. This positioning process involves dual positioning of the pad 124 and the product 8.

[0039] There are various types of clamping components 125 in the length direction and 126 in the width direction, which can be flexibly selected by those skilled in the art. For example, spring 114 type components, pneumatic components, nut and screw components, magnetic components, etc., are all acceptable as long as they can apply linear thrust. In this embodiment, a nut and screw component is preferred.

[0040] The slider 115 is slidably mounted in the through groove 1241 to guide the slider 115 along the X-axis direction. The lower end of the irregular nut 113 is located in the through groove 1241 to limit the maximum distance between the irregular nut 113 and the upright plate 111 through the side wall of the through groove 1241.

[0041] In some examples, the through groove 1241 has recesses 1242 on the walls at both ends along the width direction of the base plate 121, the recesses 1242 being used to avoid the spring 114 or the product 8.

[0042] By allowing the recessed portion 1242 to avoid contact with the pad 124, the spring 114 will not come into contact with the pad 124, thus preventing the spring force of the spring 114 from being affected by contact jamming. By allowing the recessed portion 1242 to avoid contact with the product 8, the product 8 is positioned closer to the pad 124, thereby making the pressing position of the slider 115 on the product 8 closer to the center of the product 8, preventing the product 8 from falling off due to misalignment.

[0043] In some examples, the outer contour measurement assembly 3 includes a 2D sensor module 31 and an upper light source 32. The 2D sensor module 31 is fixedly connected to the slider of the Z-axis slide 4, the camera of the 2D sensor module 31 is located above the product 8, and the upper light source 32 is located between the 2D sensor module 31 and the product 8 and moves synchronously with the 2D sensor module 31. For example, the upper light source 32 can be fixedly connected to the 2D sensor module 31 so that the two move synchronously.

[0044] The camera in the 2D sensor module 31 can capture images of the product 8 below, obtaining the outer contour of the product 8. The upper light source 32 and the lower light source 131 work together to illuminate the product 8 from the upper and lower sides respectively, ensuring image quality and improving the accuracy of the outer contour measurement.

[0045] The X-axis slide 9 is connected to the Z-axis slide 4, which drives the Z-axis slide 4 to slide along the X-axis, thereby causing the 2D sensor module 31 to slide along the X-axis. The Z-axis slide 4 can translate the 2D sensor module 31 along the Z-axis. The two work together to adjust the shooting distance of the 2D sensor module 31.

[0046] In some examples, the outer contour measurement assembly 3 also includes a 3D sensor module 33, which is fixedly connected to the slider of the Z-axis slide 4, with the laser scanning head of the 3D sensor module 33 facing the product.

[0047] The 3D sensor module 33 obtains the outer contour of the product 8 through laser scanning. Compared with the 2D sensor module 3131, which can only obtain a two-dimensional planar image of the product 8, the 3D sensor module 33 emits a laser array to collect the dimensional coordinates of the surface of the product 8 point by point, and finally generates a three-dimensional point cloud model of the product 8, which can clearly present three-dimensional features such as protrusions, depressions, and curvatures.

[0048] The X-axis slide 9 is connected to the Z-axis slide 4, which drives the Z-axis slide 4 to slide along the X-axis, thereby causing the 3D sensor module 33 to slide along the X-axis. The Z-axis slide 4 can translate the 3D sensor module 33 along the Z-axis. The two work together to adjust the shooting distance of the 3D sensor module 33.

[0049] In practical use, the measurement data of 2D sensor module 31 can be compared with the measurement data of 3D sensor module 33 to verify the accuracy.

[0050] In some examples, the inner contour measuring component 5 is a drag pin 51 measuring component, the drag pin 51 of the drag pin 51 measuring component includes a horizontal part and a measuring end 52, the measuring end 52 is connected to one end of the horizontal part and extends downward.

[0051] When measuring the inner contour, first move the product to the measurement position using the Y-axis slide 2; then adjust the hole to be measured of the product 8 to be vertically upward by rotating the cradle body 12; then move the lower end of the measuring end 52 into the hole to be measured using the Z-axis slide 6; then move the product 8 along the Y-axis direction using the Y-axis slide 2 so that the lower end of the measuring end 52 contacts both ends of the hole to be measured, and the diameter of the hole to be measured can be measured.

[0052] In some examples, there are multiple product clamping assemblies 11 to clamp multiple products onto the cradle body. There are multiple needle sensors to simultaneously measure the inner contour of multiple products.

[0053] A cradle assembly 1 has multiple product clamping assemblies 11, thereby clamping multiple products 8 simultaneously, that is, measuring the inner and outer contours of multiple products 8 in one clamping, thus improving measurement efficiency.

[0054] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for measuring internal and external contours, characterized in that, include: A cradle assembly includes a product clamping assembly, a cradle body, a cradle support, and a cradle drive device; the product clamping assembly is used to clamp a product and is fixed to the cradle body; the cradle body is rotatably mounted on the cradle support, with the rotation axis in the X-axis direction; the cradle drive device is used to drive the cradle body to rotate. The Y-axis slide is connected to the cradle support and is used to drive the cradle support to slide along the Y-axis direction; External contour measurement component, used to measure the external contour of a product; Z-axis slide one, connected to the outer contour measuring component, is used to drive the outer contour measuring component to slide along the Z-axis direction; The X-axis slide is connected to the Z-axis slide and is used to drive the Z-axis slide to slide along the X-axis direction. An inner contour measuring assembly includes a needle-climbing sensor for measuring the inner contour of a product; The second Z-axis slide is connected to the inner contour measuring component and is used to drive the inner contour measuring component to slide along the Z-axis direction.

2. The internal and external contour measuring device according to claim 1, characterized in that: It also includes a worktable, a bellows cover, and a baffle; the Y-axis slide, the X-axis slide, and the Z-axis slide are all fixed to the worktable; one end of the bellows cover is connected to the slider of the Y-axis slide, and the other end is connected to the worktable, and the bellows cover is located above the lead screw of the Y-axis slide; the baffle is fixedly connected to the worktable, and the baffle is located above the bellows cover and at least partially covers the bellows cover.

3. The internal and external contour measuring device according to claim 1, characterized in that: The cradle support is fixed with a lower light source, which is used to illuminate the product from below; the cradle body is provided with a through groove facing the product to allow light from the lower light source to pass through.

4. The internal and external contour measuring device according to claim 1, characterized in that: The product clamping assembly is used to apply a compressive force along the X-axis to press the product onto the cradle body; a positioning block is fixed on the product clamping assembly, the positioning block having a positioning surface one and a positioning surface two; the positioning surface one is used to position the radially inner end of the product relative to the rotation axis of the cradle body, and the positioning surface two is used to position the circumferential end of the product relative to the rotation axis of the cradle body.

5. The internal and external contour measuring device according to claim 4, characterized in that: The product clamping assembly includes a vertical plate, bolts, a shaped nut, a spring, a slider, and a fixing block. The vertical plate is fixedly connected to the cradle body. When the bolt is horizontal, it slides through the vertical plate along the Y-axis and is threadedly connected to the shaped nut. The bolt head and the shaped nut are located on opposite sides of the vertical plate. The spring is sleeved on the outside of the bolt and located between the bolt head and the vertical plate. The shaped nut and the slider are slidably connected through an oblique dovetail groove or an oblique T-groove to push the slider to slide along the X-axis. When the slider slides along the X-axis, it can press the product firmly onto the cradle body. The fixing block is fixedly connected to the vertical plate and located on the side of the shaped nut away from the slider, for sliding connection of the shaped nut.

6. The internal and external contour measuring device according to claim 5, characterized in that: The cradle body includes a base plate, end plates, right-angle limiting blocks, pads, a length-direction pressing assembly, and a width-direction pressing assembly. Two end plates are vertically fixed to both ends of the base plate and are positioned opposite each other. The end plates are rotatably connected to the cradle support about an axis along the X-axis, and are drively connected to the cradle drive device. Four right-angle limiting blocks are fixed to the same side surface of the base plate and are located at the four right angles of the same rectangle. The pads are located inside the four right-angle limiting blocks and are used for contact and positioning with them. The length-direction pressing assembly is connected to the base plate and is used to press the pads along the length of the base plate. The width-direction pressing assembly is connected to the base plate and is used to press the pads along the width of the base plate.

7. The internal and external contour measuring device according to claim 5, characterized in that: The wall of the through groove is provided with a recessed portion, which is used to avoid the spring or product.

8. The internal and external contour measuring device according to claim 1, characterized in that: The outer contour measurement component includes a 2D sensor module and an upper light source; the 2D sensor module is fixedly connected to the slider of the Z-axis slide, the camera of the 2D sensor module is located above the product, and the upper light source is located between the 2D sensor module and the product and moves synchronously with the 2D sensor module.

9. The internal and external contour measuring device according to claim 1, characterized in that: The outer contour measurement component includes a 3D sensor module, which is fixedly connected to the slider of the Z-axis slide, and the laser scanning head of the 3D sensor module faces the product.

10. The internal and external contour measuring device according to claim 1, characterized in that: The product clamping components are multiple, so as to clamp multiple products onto the cradle body; the crawling needle sensors are multiple, so as to simultaneously measure the inner contour of multiple products.

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