Flatness measuring jig

Abstract

The utility model belongs to the technical field of flatness detection, and discloses a flatness measuring jig. The jig comprises a base, a fixing assembly and at least two measuring instruments, a sliding channel is formed in the base in the first direction, a to-be-detected piece can be placed in the sliding channel, the to-be-detected piece can be limited on the two opposite sides in the second direction, and an included angle is formed between the first direction and the second direction; the fixing assembly comprises a stand column and a cross beam which are connected, the stand column is vertically arranged on the base, and the cross beam is arranged on the stand column in a lifting mode and located above the sliding channel. The at least two measuring instruments are arranged on the cross beam at intervals in the second direction, and the measuring ends of the measuring instruments can abut against the to-be-detected piece so as to measure the flatness of the to-be-detected piece. When the jig is used for measuring the flatness of the to-be-detected pieces in batches, the measurement time can be shortened, and the detection efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection, in particular to a flatness measuring jig. Background Art

[0002] Mirror panels are key components in optical instruments and high-end decoration. They play a crucial role in ensuring the imaging accuracy of optical instruments. Their flatness affects instrument performance and the appearance of high-end decoration. Despite their simple shape, mirror panels have stringent quality requirements. Even the slightest flatness deviation can impair their performance and product quality.

[0003] Currently, the flatness of mirror panels is measured using three-dimensional coordinate measurement, which requires multiple measurement points to be determined and inspected separately. However, when inspecting large quantities of mirror panels, conventional inspection methods require multi-point measurement and data processing for each mirror panel. This requires inspectors to spend a considerable amount of time inspecting individual mirror panels, and each measurement step is repetitive and cumbersome. This results in inefficient and time-consuming batch flatness testing of mirror panels, leading to production process stagnation and long wait times for operators to obtain results. This impacts production efficiency, increases costs, and can delay production schedules, making it impossible to meet customer requirements for product delivery quantity and timelines. Utility Model Content

[0004] The purpose of the utility model is to provide a flatness measuring jig to improve the detection efficiency when measuring the flatness of batches of parts to be detected.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A flatness measuring jig, comprising:

[0007] A base, wherein the base is provided with a sliding channel along a first direction, the sliding channel being capable of placing a member to be detected and limiting the member to be detected on two opposite sides along a second direction, the first direction being arranged at an angle to the second direction;

[0008] A fixed assembly, comprising a column and a beam connected to each other, wherein the column is erected on the base, and the beam is liftably disposed on the column and is located above the sliding channel;

[0009] At least two measuring instruments are provided on the beam at intervals along the second direction, and measuring ends of the measuring instruments can abut against the workpiece to be detected to measure the flatness of the workpiece to be detected.

[0010] As an optional solution for a flatness measuring jig, the base includes a base frame and two limiting members connected to the base frame, and the two limiting members and a portion of the top surface of the base frame form the sliding channel.

[0011] As an optional solution for a flatness measurement jig, the distance between the two limit members is adjustable to accommodate various sizes of the workpiece to be tested.

[0012] As an optional solution for a flatness measuring jig, the base also includes a positioning piece, one of the base frame and the limiting piece is provided with a waist-shaped hole along the second direction, the other is provided with a positioning hole, and the positioning piece passes through the waist-shaped hole and the positioning hole.

[0013] As an optional solution of the flatness measuring jig, the bottom surface of the sliding channel is provided with a groove along the first direction, and the groove reduces the contact area between the sliding channel and the part to be detected.

[0014] As an optional solution for a flatness measuring jig, two upright posts are provided, the two upright posts are connected to the two ends of the beam, and the measuring instrument and the sliding channel are located between the two upright posts.

[0015] As an optional solution for a flatness measuring jig, the fixing assembly also includes a first fastener, the beam is provided with a first mounting hole, the column passes through the first mounting hole, the first fastener passes through the side wall of the first mounting hole, and tightens the column into the first mounting hole.

[0016] As an optional solution of the flatness measuring jig, at least two measuring instruments are arranged on the beam at equal intervals along the second direction.

[0017] As an optional solution for a flatness measuring jig, the fixing assembly also includes a second fastener, the beam is provided with a second mounting hole, the measuring instrument passes through the second mounting hole, the second fastener passes through the side wall of the second mounting hole, and tightens the measuring instrument into the second mounting hole.

[0018] As an optional solution for a flatness measuring jig, the measuring end of the measuring instrument is in rolling contact with the workpiece to be tested.

[0019] Beneficial effects:

[0020] The utility model provides a flatness measuring jig, wherein a base is provided with a sliding channel for placing a workpiece to be detected along a first direction, and limits the workpiece to be detected on two opposite sides along a second direction; a column of a fixing assembly is erected on the base; a crossbeam is liftably arranged on the column and located above the sliding channel; at least two measuring instruments are arranged on the crossbeam at intervals along the second direction; and measuring ends of the measuring instruments can abut against the workpiece to be detected to measure the flatness of the workpiece to be detected.

[0021] This fixture uses a dynamic measurement method to measure the flatness of the workpiece to be tested by sliding it along a sliding channel. Compared with traditional single-point or multi-point static measurement, it does not require repeated positioning and multiple measurements of each workpiece to be tested during batch testing. The measurement can be completed by simply sliding the workpiece to be tested in the sliding channel, and the flatness of the workpiece to be tested can be determined based on the changes in the readings of each detection gauge, which can shorten the measurement time and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a first schematic diagram of the flatness measurement jig provided by an embodiment of the present utility model;

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a second schematic diagram of the flatness measurement jig provided by an embodiment of the present utility model.

[0025] In the picture:

[0026] 1-base; 11-sliding channel; 12-underframe; 13-limiting member; 14-groove;

[0027] 2-fixing assembly; 21-column; 22-beam; 23-first fastener; 24-second fastener;

[0028] 3-Measuring instrument; 4-Parts to be tested. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper" and "lower" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive distinction and do not have any special meaning.

[0033] This embodiment provides a flatness measuring jig for measuring the flatness of a mirror plate. The mirror plate includes a detection surface and a non-detection surface. The flatness of the detection surface is required to be less than 0.01. For the non-detection surface, the flatness requirement can be appropriately relaxed without affecting the normal function and assembly of the mirror plate. Figure 1-Figure 3 As shown, the jig includes a base 1, a fixing assembly 2 and at least two measuring instruments 3. The base 1 is provided with a sliding channel 11 along a first direction, the sliding channel 11 can place the part to be tested 4, and limit the part to be tested 4 on two opposite sides along a second direction, and the first direction is set at an angle to the second direction. The fixing assembly 2 includes a connected column 21 and a beam 22, the column 21 is upright on the base 1, and the beam 22 can be raised and lowered on the column 21 and is located above the sliding channel 11. At least two measuring instruments 3 are arranged on the beam 22 at intervals along the second direction, and the measuring ends of the measuring instruments 3 can abut against the part to be tested 4 to measure the flatness of the part to be tested 4.

[0034] This jig adopts a dynamic measurement method of measuring the flatness of the workpiece 4 to be tested by sliding it along the sliding channel 11. Compared with traditional single-point or multi-point static measurement, during batch testing, there is no need to repeatedly position and measure each workpiece 4 to be tested. The measurement can be completed by only sliding the workpiece 4 to be tested in the sliding channel 11, and the flatness of the test surface of the workpiece 4 to be tested can be determined based on the changes in the readings of each testing gauge 3, which can shorten the measurement time and improve the testing efficiency.

[0035] It is worth noting that the piece to be tested 4 in this embodiment is a mirror plate. In other embodiments, the flatness measurement jig can also be applied to other products, and the jig has good versatility.

[0036] In this embodiment, if Figure 3 As shown, the first and second directions are perpendicular. When the inspected component 4 slides along the sliding channel 11 in the first direction, the measuring instruments 3 are spaced apart along the second direction. Therefore, for the same sliding distance, the corresponding measurement paths are of the same length. This ensures that the data collected by each measuring instrument 3 is equally valid and comparable, effectively improving the accuracy and reliability of the flatness measurement results.

[0037] During the actual measurement process, the measuring instrument 3 measures the straightness of at least two parallel lines on the surface of the part to be tested 4 to characterize the flatness of the entire plane. Based on the geometric properties of a plane, multiple parallel lines can fully reflect the overall characteristics of a plane. When measuring along the parallel lines on the surface of the part to be tested 4, the measuring instrument 3 obtains the height information of different points on each line and calculates the straightness data of each line. Based on the height difference between the multiple lines, the flatness condition of the entire test surface of the part to be tested 4 is inferred, and then it is determined whether the part to be tested 4 meets the corresponding flatness standard, ensuring that the product quality and performance meet the standards.

[0038] In this embodiment, at least two measuring instruments 3 are arranged at equal intervals along the second direction on the beam 22. The equally spaced distribution of the measuring instruments 3 ensures that each measuring instrument 3 covers a relatively evenly distributed area during measurement, preventing deviations in flatness assessment caused by uneven distribution of measurement points and improving the accuracy of flatness measurement.

[0039] Specifically, if Figure 1 As shown, three measuring instruments 3 are arranged on the crossbeam 22 at equal intervals along the second direction. The measuring ends of the three measuring instruments 3 are capable of abutting against the workpiece 4 to measure the flatness of the workpiece 4. In other embodiments, the number of measuring instruments 3 varies depending on the size of the workpiece 4 to be tested, and the number can be four, five, or six, etc.

[0040] In this embodiment, the measuring end of the measuring instrument 3 is in rolling contact with the part to be inspected 4, reducing friction between the measuring end and the surface of the part 4 during measurement. This allows the measuring instrument 3 to move more smoothly when measuring the flatness of the part 4, reducing measurement errors caused by friction and improving the accuracy and reliability of the measurement results. Furthermore, rolling contact reduces surface damage to the part 4, preventing scratches and other damage, ensuring the intact appearance and stable performance of the part 4. Specifically, the measuring end of the measuring instrument 3 is a ball bearing, which enables rolling contact with the part 4.

[0041] It is worth mentioning that the measuring instrument 3 uses a digital micrometer, and other instruments that can measure flatness can also be used, and no specific limitation is made here.

[0042] In this embodiment, the base 1 includes a base frame 12 and two limiting members 13 connected to the base frame 12. The two limiting members 13 and a portion of the top surface of the base frame 12 form a sliding channel 11, which can limit the inspection member 4 in the second direction, ensuring that the inspection member 4 will not deviate or shake during the sliding process, thereby providing a stable and reliable measurement reference for the measuring instrument 3, which is conducive to obtaining accurate measurement data.

[0043] Furthermore, the spacing between the two stoppers 13 is adjustable to accommodate various sizes of test pieces 4. This allows the flatness measurement jig to accommodate test pieces 4 of varying widths, eliminating the need for a dedicated jig for each size of test piece 4. This reduces production costs, enhances the jig's versatility, and improves testing flexibility.

[0044] Specifically, the base 1 also includes a positioning member, and one of the base frame 12 and the limiting member 13 is provided with a waist-shaped hole along the second direction, and the other of the two is provided with a positioning hole, and the positioning member is penetrated by the waist-shaped hole and the positioning hole. The operator can move the positioning member to a suitable position in the waist-shaped hole and insert it into the positioning hole according to the size requirements of the part to be detected 4, so that the limiting member 13 is stabilized at the required spacing, which not only ensures the accuracy of the adjustment, but also facilitates the operation and improves the efficiency of the fixture adjustment. Optionally, the base frame 12 is provided with a waist-shaped hole along the second direction, and the limiting member 13 is provided with a positioning hole, and the positioning member is penetrated by the waist-shaped hole and the positioning hole to fix the limiting member 13 to the base frame 12. Optionally, the base frame 12 is provided with a positioning hole, and the limiting member 13 is provided with a waist-shaped hole along the second direction, and the positioning member is penetrated by the waist-shaped hole and the positioning hole to fix the limiting member 13 to the base frame 12.

[0045] It is worth noting that the positioning member can be a screw or a bolt, and no specific limitation is made here.

[0046] In this embodiment, the bottom surface of the sliding channel 11 is provided with a groove 14 along the first direction, and the groove 14 reduces the contact area between the sliding channel 11 and the part to be detected 4. The groove 14 can reduce the friction between the non-detection surface of the part to be detected 4 and the sliding channel 11, making the part to be detected 4 slide more smoothly, improving the measurement efficiency, and reducing its surface wear. Figure 2 and Figure 3 As shown, the grooves 14 are spaced apart along the second direction on the bottom surface of the sliding channel 11 . The spaced apart grooves 14 reduce the contact area between the sliding channel 11 and the part to be detected 4 while effectively supporting and limiting the part to be detected 4 .

[0047] In this embodiment, if Figure 1As shown, two columns 21 are provided, connecting the ends of the beam 22. The measuring instrument 3 and the sliding channel 11 are located between the two columns 21. The gantry structure formed by the two columns 21 connecting the ends of the beam 22 can effectively bear weight and evenly distribute force, reducing measurement errors caused by structural deformation, ensuring the position accuracy of the measuring instrument 3, and improving the accuracy and reliability of flatness measurement.

[0048] In this embodiment, if Figure 1 and Figure 3 As shown, the fixing assembly 2 also includes a first fastener 23. The crossbeam 22 is provided with a first mounting hole, through which the column 21 passes. The first fastener 23 penetrates the sidewall of the first mounting hole, tightening the column 21 into the first mounting hole. This facilitates adjustment of the height position of the crossbeam 22 and precise fixation, allowing the measuring instrument 3 to be flexibly adjusted to the appropriate height according to the size and measurement requirements of the different parts to be tested 4. This ensures that the measuring end of the measuring instrument 3 maintains proper contact with the surface to be tested of the part to be tested 4, thereby improving the accuracy and effectiveness of the measurement.

[0049] It is worth noting that the first fastener 23 can be a screw or a bolt, which is not specifically limited here.

[0050] In this embodiment, if Figure 3 As shown, the fixing assembly 2 also includes a second fastener 24. The crossbeam 22 is provided with a second mounting hole, through which the measuring instrument 3 is inserted. The second fastener 24 extends through the sidewall of the second mounting hole, securing the measuring instrument 3 within the second mounting hole. This allows for separate adjustment of each measuring instrument 3, facilitating zeroing of the reading of each measuring instrument 3 before measurement, ensuring the accuracy of the initial measurement data. This further improves measurement precision and reliability, allowing the jig to better adapt to complex and diverse measurement needs, and effectively enhancing the jig's flexibility and practicality.

[0051] It is worth noting that the second fastener 24 can be a screw or a bolt, which is not specifically limited here.

[0052] The working process of the flatness measuring jig of this embodiment is roughly as follows: First, adjust the distance between the two limiters 13 to adapt to the size of the workpiece 4 to be tested. Next, push the standard part along the sliding channel 11, adjust the fixed position of the beam 22 and the column 21, and make the measuring end of the measuring instrument 3 abut against the standard part. Then, adjust the fixed position of the measuring instrument 3 and the beam 22 respectively, and zero the measuring instrument 3. Finally, after completing the adjustment of the fixed position of each component, push out the standard part, start measuring the flatness of the batch of workpieces 4 to be tested, push the workpiece 4 to be tested along the sliding channel 11, and record the change in the reading of each measuring instrument 3 during the test. If the reading change is less than 0.01, it is recorded as a qualified product, and if the reading change is greater than or equal to 0.01, it is recorded as an unqualified product.

[0053] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flatness measuring jig, characterized in that: include: A base (1), wherein the base (1) is provided with a sliding channel (11) along a first direction, the sliding channel (11) is capable of placing a to-be-detected member (4) and limiting the to-be-detected member (4) on two opposite sides along a second direction, the first direction and the second direction being arranged at an angle; A fixed assembly (2) comprising a connected column (21) and a crossbeam (22), wherein the column (21) is erected on the base (1), and the crossbeam (22) is liftably disposed on the column (21) and is located above the sliding channel (11); At least two measuring instruments (3) are provided, at least two of the measuring instruments (3) are spaced apart along the second direction on the crossbeam (22), and the measuring ends of the measuring instruments (3) are capable of abutting against the part to be detected (4) to measure the flatness of the part to be detected (4).

2. The flatness measuring jig according to claim 1, characterized in that: The base (1) comprises a bottom frame (12) and two limiting members (13) connected to the bottom frame (12); the two limiting members (13) and a portion of the top surface of the bottom frame (12) form the sliding channel (11).

3. The flatness measuring jig according to claim 2, characterized in that: The distance between the two limiting members (13) is adjustable to accommodate various sizes of the parts to be detected (4).

4. The flatness measuring jig according to claim 3, characterized in that: The base (1) further comprises a positioning member, one of the base frame (12) and the limiting member (13) is provided with a waist-shaped hole along the second direction, the other of the two is provided with a positioning hole, and the positioning member passes through the waist-shaped hole and the positioning hole.

5. The flatness measuring jig according to claim 1, characterized in that: The bottom surface of the sliding channel (11) is provided with a groove (14) along the first direction, and the groove (14) reduces the contact area between the sliding channel (11) and the part to be detected (4).

6. The flatness measuring jig according to claim 1, characterized in that: There are two upright posts (21), the two upright posts (21) connect the two ends of the crossbeam (22), and the measuring instrument (3) and the sliding channel (11) are located between the two upright posts (21).

7. The flatness measuring jig according to claim 1, characterized in that: The fixing assembly (2) further includes a first fastener (23), the crossbeam (22) is provided with a first mounting hole, the column (21) passes through the first mounting hole, and the first fastener (23) passes through the side wall of the first mounting hole to tighten the column (21) into the first mounting hole.

8. The flatness measuring jig according to claim 1, characterized in that: At least two measuring instruments (3) are arranged on the crossbeam (22) at equal intervals along the second direction.

9. The flatness measuring jig according to claim 1, characterized in that: The fixing assembly (2) further includes a second fastener (24), the crossbeam (22) is provided with a second mounting hole, the measuring instrument (3) passes through the second mounting hole, and the second fastener (24) penetrates the side wall of the second mounting hole to tighten the measuring instrument (3) into the second mounting hole.

10. The flatness measuring jig according to claim 1, characterized in that: The measuring end of the measuring instrument (3) is in rolling contact with the part to be detected (4).

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