Workpiece detection and positioning fixture

Abstract

The utility model relates to a work piece detects positioning fixture, through setting up the flat position groove that is compatible with the flat position shape of work piece, effectively limited the rotation degree of freedom of work piece in horizontal plane, realized quick, accurate angular orientation, this ensured that work piece had only and repeatable orientation when repeatedly clamped, significantly improved the accuracy and consistency of detection result, the fixture mainly comprises fixture base body and fixture bottom plate, and the structure is simple, this not only reduced the design and manufacturing cost, also made the assembly, use and maintenance of fixture more convenient, the through groove on the fixture base body and the clearance slot on the fixture bottom plate constitute the visual channel that penetrates from top to bottom in common, the channel provides the unobstructed penetration path for the projection light path of two -dimensional image measuring instrument, avoids the shielding of flat position contour by the fixture body, thereby realizes the high accuracy, high efficiency non - contact measurement to work piece bottom contour.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a workpiece detection and positioning fixture. Background Technology

[0002] Rapid and accurate positioning and measurement of workpieces are crucial for ensuring product quality. Optical measurement technology, especially two-dimensional image measurement technology, is widely used for detecting geometric parameters such as workpiece contours and dimensions due to its non-contact, high efficiency, and high precision. However, the effective application of this technology largely depends on the performance of the inspection fixture. Traditional workpiece fixtures used for optical measurement often suffer from problems such as complex structures, insufficient positioning accuracy, or obstruction of the measurement optical path. For example, some fixtures struggle to achieve stable and unique angular positioning when holding workpieces with specific characteristics (such as flatness), leading to orientation deviations during repeated clamping and directly affecting the accuracy and repeatability of measurement results. Furthermore, if the fixture design does not fully consider the needs of optical measurement, its structure may block the projection light from the image measuring instrument from top to bottom or bottom to top, creating a measurement blind zone. This prevents key features of the workpiece (such as bottom contours or flatness shapes) from being clearly imaged and accurately measured, necessitating the use of more complex or inefficient inspection solutions. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a workpiece detection and positioning fixture that is simple in structure, accurate in positioning and convenient for optical measurement.

[0004] To achieve the above objectives, this utility model employs a workpiece inspection and positioning fixture, comprising a fixture base and a fixture bottom plate. The fixture base has at least one flat groove for accommodating the flat part of the workpiece. The shape of the flat groove is adapted to the flat part of the workpiece to perform angular positioning of the workpiece. The fixture base has a through groove. The fixture bottom plate is installed at the bottom of the fixture base, and the fixture bottom plate has a clearance slot corresponding to the through groove and communicating with it.

[0005] The beneficial effects of the above structure are as follows: by opening a flat groove that matches the shape of the workpiece's flat section, the workpiece's rotational freedom in the horizontal plane is effectively restricted, achieving rapid and accurate angular positioning. This ensures that the workpiece has a unique and repeatable orientation during repeated clamping, significantly improving the accuracy and consistency of the inspection results. The fixture mainly consists of a fixture base and a fixture bottom plate, with a simple structure. This not only reduces design and manufacturing costs but also makes the fixture assembly, use, and maintenance more convenient. The through groove on the fixture base and the clearance slot on the fixture bottom plate together form a top-to-bottom through vision channel. This channel provides an unobstructed penetration path for the projection light path of the two-dimensional image measuring instrument, avoiding the fixture body from obstructing the flat section contour, thereby achieving high-precision and high-efficiency non-contact measurement of the bottom contour of the workpiece.

[0006] This utility model is further configured with a clearance fit between the flat groove and the workpiece flat groove. By using a clearance fit flat groove, the machining tolerances of the workpiece and the fixture are compensated, ensuring smooth clamping of all qualified workpieces. At the same time, the repeatability error of angular positioning is limited to a very small range, thus meeting the requirements of high-precision measurement while ensuring ease of operation.

[0007] This utility model is further configured such that the through slot is vertically aligned with the clearance slot of the fixture base plate. By aligning the through slot with the clearance slot of the base plate vertically, the physical structure of the fixture can be preserved to the greatest extent while ensuring unobstructed measurement optical path, thus optimizing the overall rigidity and stability of the fixture and extending its service life. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0009] Figure 2 This is an exploded view of the assembly of the fixture frame and the fixture base plate according to an embodiment of the present utility model. Detailed Implementation

[0010] like Figures 1-2 As shown, an embodiment of this utility model provides a workpiece detection and positioning fixture, including a fixture base 1 and a fixture bottom plate 2. The fixture base 1 has at least ten flat grooves 11 for accommodating the flat parts of the workpiece. The shape of the flat grooves 11 is adapted to the flat parts of the workpiece to achieve angular positioning of the workpiece 3. At the same time, a through groove 12 is also provided on the fixture base 1. The fixture bottom plate 2 is installed at the bottom of the fixture base 1 and has a clearance slot 21 corresponding to the through groove 12. The two are interconnected. The flat grooves 11 and the flat parts of the workpiece are fitted with a clearance. Furthermore, the through groove 12 and the clearance slot 21 of the fixture bottom plate 2 are vertically aligned.

[0011] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A workpiece inspection and positioning fixture, characterized in that: The fixture includes a fixture base and a fixture base plate. The fixture base has at least one flat groove for accommodating the flat part of the workpiece. The shape of the flat groove is adapted to the flat part of the workpiece to perform angular positioning of the workpiece. The fixture base has a through groove. The fixture base plate is installed at the bottom of the fixture base and has a clearance slot corresponding to the through groove.

2. The workpiece detection and positioning fixture according to claim 1, characterized in that: The flat groove and the workpiece flat part are in clearance fit.

3. The workpiece detection and positioning fixture according to claim 1 or 2, characterized in that: The through groove is aligned vertically with the clearance slot of the fixture base plate.

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