Object boundary dimension inspection tool

Abstract

The utility model belongs to the field of testing, and particularly relates to an object boundary dimension inspection tool. In order to conveniently inspect a large number of to-be-inspected objects, the object boundary dimension inspection tool comprises a dimension inspection area, and the dimension inspection area comprises a first channel and a second channel which are communicated with each other; one end, far away from the second channel, of the first channel is open, and the width of the opening meets the condition that the width is equal to the maximum qualified size of the to-be-detected object, so that the to-be-detected object with the corresponding size not larger than the maximum qualified size enters the first channel; the width of the first channel meets the condition that the narrowest part is not smaller than the minimum qualified size; and the width of the second channel is equal to the minimum qualified size of the object to be detected, so that the qualified workpiece with the corresponding minimum size is prevented from shaking in the second channel. When a worker inspects a large number of objects to be inspected, the worker only needs to conduct secondary inspection on the workpieces entering the second channel, inspection is convenient, and labor is saved.

Description

Technical Field

[0001] This utility model belongs to the field of testing, and in particular relates to a tooling for inspecting the external dimensions of objects. Background Technology

[0002] After a workpiece is manufactured, its external dimensions (length, width, and height) need to be inspected to determine its conformity. Currently, conventional measuring tools such as vernier calipers or inspection equipment such as coordinate measuring machines (CMMs) are generally used to inspect the workpiece's external dimensions. However, in actual production, the efficiency of using conventional measuring tools is low, while inspection equipment such as CMMs is expensive and difficult to operate.

[0003] To address the aforementioned issues, a utility model patent with authorization announcement number TW509331U and authorization announcement date of November 1, 2002, discloses an IC product placement tray testing tool. This testing tool includes a length inspection area, which comprises two reference surfaces. One reference surface is a plane, and the other reference surface is an inclined plane, so that the distance between the reference surfaces on both sides of the length inspection area is different. The maximum value of the distance between the reference surfaces is greater than the maximum tolerance dimension of the object to be inspected, and the minimum value of the distance between the reference surfaces is less than the minimum tolerance dimension of the object to be inspected.

[0004] On the side with a larger distance between the reference planes, the length inspection area has an opening for the object to be inspected to enter between the two reference planes. The length inspection area also includes a maximum value indicator line and a minimum value indicator line.

[0005] When measuring the object to be tested, first, allow the object to be tested to enter between the two reference planes through the opening. If the object cannot enter, it proves that the size of the object is too large. Otherwise, continue with the following operation: move the object to be tested towards the side with the smaller distance between the reference planes. If the object is not stuck between the two reference planes, it proves that the size of the object is too small. If the object is stuck between the two reference planes, observe whether the stuck point is located between the maximum indicator line and the minimum indicator line. If it is, the size of the object is qualified; otherwise, it is unqualified.

[0006] When using the aforementioned inspection tools to check the dimensions of an object, if the object is stuck between two reference planes, the relative positions of the object, the maximum indicator line, and the minimum indicator line must be observed to determine whether the object is qualified. In actual production, workers need to inspect a large number of objects. Since the pass rate of the objects is not low, most of the objects are stuck between the two reference planes. Operators need to repeatedly observe the relative positions of the object, the maximum indicator line, and the minimum indicator line, making the inspection process quite cumbersome. Utility Model Content

[0007] The purpose of this utility model is to provide a tooling for inspecting the external dimensions of objects, so as to solve the technical problem of the cumbersome process of inspecting a large number of objects using existing inspection tools.

[0008] To achieve the above objectives, the technical solution of the object shape and size inspection fixture provided by this utility model is as follows:

[0009] A fixture for inspecting the external dimensions of an object includes a first dimension inspection area for inspecting one of the length, width, and height dimensions of the object to be inspected. The first dimension inspection area includes a first channel and a second channel that are interconnected.

[0010] The first channel opens at one end away from the second channel. The width of this opening satisfies the following condition: it is equal to the maximum acceptable size of the object to be inspected, so that objects to be inspected whose corresponding size is not greater than the maximum acceptable size can enter the first channel.

[0011] The width of the first channel must meet the following requirement: the narrowest point is not less than the minimum acceptable size;

[0012] The width of the second channel is equal to the minimum acceptable size of the object to be inspected, so as to prevent the smallest acceptable workpiece from shaking in the second channel.

[0013] Furthermore, the width of the first channel satisfies the following conditions: equal to the maximum acceptable size of the object to be inspected; and a stop step is formed at the junction of the first and second channels to stop the qualified workpieces.

[0014] Furthermore, the width of the first channel satisfies the following: the dimension at the connection with the second channel is equal to the minimum acceptable dimension of the object to be inspected, and the width of the first channel gradually narrows from the opening to the connection with the second channel, and the sidewall of the first channel constitutes a stop for stopping the qualified workpiece.

[0015] Furthermore, the first channel includes a first equal-diameter section and a first variable-diameter section that are interconnected, and the second channel is connected to the first variable-diameter section. The width of the first equal-diameter section satisfies the following condition: equal to the maximum acceptable size of the object to be inspected.

[0016] The width of the first variable diameter section satisfies the following conditions: the dimension at the connection with the first equal diameter section is equal to the maximum acceptable dimension of the object to be inspected, the dimension at the connection with the second channel is equal to the minimum acceptable dimension of the object to be inspected, and the first variable diameter section gradually narrows from the connection with the first equal diameter section to the connection with the second channel. The sidewall of the first variable diameter section constitutes a stop for stopping the qualified workpiece.

[0017] Furthermore, it also includes a second dimension inspection area for inspecting another of the length, width, and height dimensions of the object to be inspected, the second dimension inspection area including a third channel and a fourth channel that are interconnected;

[0018] The third channel has an opening at one end away from the fourth channel. The width of this opening is equal to the maximum acceptable size of the object to be inspected, so that objects whose size is not greater than the maximum acceptable size can enter the third channel.

[0019] The width of the third channel must meet the following requirement: the narrowest point is not less than the minimum acceptable size;

[0020] The width of the fourth channel is equal to the minimum acceptable size of the object to be inspected, so as to prevent the smallest acceptable workpiece from shaking in the fourth channel.

[0021] Furthermore, the width of the third channel satisfies the following conditions: equal to the maximum acceptable size of the object to be inspected; and a stop step is formed at the intersection of the third and fourth channels to stop the qualified workpiece.

[0022] Furthermore, the width of the third channel satisfies the following: the dimension at the connection with the fourth channel is equal to the minimum acceptable dimension of the object to be inspected, and the width of the third channel gradually narrows from the opening to the connection with the fourth channel. The sidewall of the third channel constitutes a stop for stopping the qualified workpiece.

[0023] Furthermore, the third channel includes a second equal-diameter section and a second variable-diameter section that are interconnected, and the fourth channel is connected to the second variable-diameter section. The width of the second equal-diameter section satisfies the condition that it is equal to the maximum acceptable size of the object to be inspected.

[0024] The width of the second variable diameter section satisfies the following conditions: the dimension at the connection with the second equal diameter section is equal to the maximum acceptable dimension of the object to be inspected, the dimension at the connection with the fourth channel is equal to the minimum acceptable dimension of the object to be inspected, and the second variable diameter section gradually narrows from the connection with the second equal diameter section to the connection with the fourth channel. The sidewall of the second variable diameter section constitutes a stop for the qualified workpiece of the stop section.

[0025] Furthermore, it also includes a third dimension inspection area for inspecting the last of the length, width, and height dimensions of the object to be inspected. The third dimension inspection area includes a fifth channel and a sixth channel that are interconnected.

[0026] The fifth channel has an opening at the end away from the sixth channel. The width of this opening is equal to the maximum acceptable size of the object to be inspected, so that objects to be inspected whose corresponding size is not greater than the maximum acceptable size can enter the fifth channel.

[0027] The width of the fifth channel must meet the following requirement: the narrowest point must not be less than the minimum acceptable size;

[0028] The width of the sixth channel is equal to the minimum acceptable size of the object to be inspected, so as to prevent the smallest acceptable workpiece of the corresponding size from shaking in the sixth channel.

[0029] Furthermore, the object's external dimensions inspection fixture includes a base, and each dimension inspection area is composed of grooves set on the base.

[0030] The beneficial effects of the object shape dimension inspection fixture provided by this utility model are as follows: This utility model is a pioneering invention. The main difference between this utility model and the prior art is that: existing inspection tools have only one channel, so it is necessary to configure a maximum indicator line and a minimum indicator line for the channel. In this utility model, the dimension inspection area of ​​the object shape dimension inspection fixture has two channels. At the same time, it is possible to directly use the specifications of the channels to determine whether the workpiece is qualified, without the need to set indicator lines.

[0031] When using the object shape and size inspection fixture of this utility model to inspect a workpiece, the operation can be carried out according to the following steps:

[0032] Step S1: Try to insert the object to be tested into the first channel from the opening of the first channel. Since the width of the opening is equal to the maximum acceptable size of the object to be tested, if the object to be tested can enter the first channel, it proves that the object to be tested is not too big. If the object to be tested cannot enter the first channel, it proves that the object to be tested is too big and unacceptable.

[0033] Step S2: Try to move the object to be inspected from the first channel to the second channel. Since the width of the second channel is equal to the minimum acceptable size of the object to be inspected, and the width of the first channel is not less than the minimum acceptable size, if the object to be inspected cannot be moved into the second channel, it proves that the object to be inspected is not too small. At this time, it can be determined that the corresponding size of the object to be inspected is acceptable. If the object to be inspected can be moved into the second channel, then proceed to step S3.

[0034] Step S3: Try shaking the object to be inspected. Since the width of the second channel is equal to the minimum acceptable size of the object to be inspected, if the object to be inspected cannot be shaken, it proves that the corresponding size of the object to be inspected is the minimum acceptable size. At this time, it can be determined that the corresponding size of the object to be inspected is acceptable. If the object to be inspected can be shaken, it proves that the object to be inspected is too small and unacceptable.

[0035] When workers use the object shape and size inspection fixture of this utility model to inspect a large number of objects, most of the workpieces will be located in the first channel and cannot enter the second channel. A small number of workpieces cannot enter the first channel, and a small number of workpieces can enter the second channel. Workers only need to perform a second inspection on the workpieces that have entered the second channel (i.e., try to shake the workpieces). The inspection is more convenient and saves manpower. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the object external dimension inspection fixture of this utility model;

[0037] Figure 2 This is a diagram showing the usage status of the tooling for inspecting the external dimensions of objects according to this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. First equal diameter section; 2. First variable diameter section; 3. Second channel; 4. Stop section; 5. Guide channel; 6. Third channel; 7. Fourth channel; 8. Stop step; 9. Handle; 10. Object to be inspected; 11. Disengagement channel. Detailed Implementation

[0040] To address the problems in the background technology, the core inventive concept of this utility model is as follows: the size of the object to be inspected is determined based on whether the workpiece can enter the channel. The entrance of each channel is regarded as a measuring tool. If the object to be inspected can enter the first channel but cannot enter the second channel, it proves that the size of the object to be inspected is between the entrance width of the first channel and the entrance width of the second channel. At the same time, the width of the second channel is made equal to the minimum qualified size. The object to be inspected is judged to be qualified by shaking the object to be inspected in the second channel.

[0041] The present invention will be further described in detail below with reference to the embodiments.

[0042] Specific embodiments of the object dimensional inspection fixture provided by this utility model:

[0043] Reference Figures 1-2 As shown, the object dimensional inspection fixture includes a dimensional inspection area for inspecting the dimensions of the object 10 to be inspected. The number of dimensional inspection areas varies depending on the number of dimensions to be inspected for the object 10.

[0044] For example, if only the length of the object 10 to be inspected needs to be checked, the dimensional inspection area only includes the length inspection area; if the length and height of the object 10 to be inspected need to be checked simultaneously, the dimensional inspection area includes both the length and height inspection areas; if the length, width, and height of the object 10 to be inspected need to be checked simultaneously, the dimensional inspection area includes the length inspection area, the width inspection area, and the height inspection area. In actual production, those skilled in the art can set the number of dimensional inspection areas according to the actual situation (i.e., the actual dimensions to be inspected), which will not be elaborated here.

[0045] like Figure 2 As shown, to facilitate understanding of this utility model by those skilled in the art, the present utility model will be described in detail using the object to be tested 10 as an example of a "U"-shaped hanging lug.

[0046] For this lifting lug, it is necessary to inspect the height and length dimensions of the lifting lug. Therefore, the dimension inspection area includes a first dimension inspection area and a second dimension inspection area. The first dimension inspection area constitutes a length inspection area for inspecting the length of the lifting lug, and the second dimension inspection area constitutes a height inspection area for inspecting the height of the lifting lug.

[0047] The length inspection area includes a first channel and a second channel 3 that are interconnected. The first channel is open at one end away from the second channel 3. The width of the opening is equal to the maximum acceptable size of the object to be inspected 10, so that the object to be inspected 10 whose corresponding size (i.e., length size) is not greater than the maximum acceptable size can enter the first channel. The width of the first channel is not less than the minimum acceptable size at its narrowest point. The width of the second channel 3 is equal to the minimum acceptable size of the object to be inspected 10, so as to prevent the smallest acceptable workpiece from shaking in the second channel 3.

[0048] The height inspection area includes a third channel 6 and a fourth channel 7 that are interconnected. The third channel 6 has an opening at one end away from the fourth channel 7, and the width of this opening is equal to the maximum acceptable size of the object to be inspected 10, so that the object to be inspected 10 whose corresponding size (i.e., height size) is not greater than the maximum acceptable size can enter the third channel 6. The width of the third channel 6 is not less than the minimum acceptable size at its narrowest point. The width of the fourth channel 7 is equal to the minimum acceptable size of the object to be inspected 10, so as to prevent the smallest acceptable workpiece from shaking in the fourth channel 7.

[0049] When inspecting the length of object 10, the following steps can be taken:

[0050] Step S1: Try to insert the object to be tested 10 into the first channel from the opening of the first channel. Since the width of the opening is equal to the maximum qualified size of the object to be tested 10, if the object to be tested 10 can enter the first channel, it proves that the object to be tested 10 is not too big. If the object to be tested 10 cannot enter the first channel, it proves that the object to be tested 10 is too big and unqualified.

[0051] Step S2: Attempt to move the object to be inspected 10 from the first channel to the second channel 3. Since the width of the second channel 3 is equal to the minimum acceptable size of the object to be inspected 10, and the width of the first channel is not less than the minimum acceptable size, if the object to be inspected 10 cannot be moved into the second channel 3, it proves that the object to be inspected 10 is not too small. At this time, it can be determined that the corresponding size of the object to be inspected 10 is acceptable. If the object to be inspected 10 can be moved into the second channel 3, then proceed to step S3.

[0052] Step S3: Try shaking the object to be tested 10. Since the width of the second channel 3 is equal to the minimum acceptable size of the object to be tested 10, if the object to be tested 10 cannot be shaken, it proves that the corresponding size of the object to be tested 10 is the minimum acceptable size. At this time, it can be determined that the corresponding size of the object to be tested 10 is acceptable. If the object to be tested 10 can be shaken, it proves that the object to be tested 10 is too small and unacceptable.

[0053] Similarly, when inspecting the height dimension of the object to be inspected 10, the above steps can be referred to for operation, which will not be elaborated here. When both the length dimension and the height dimension of the object to be inspected 10 are qualified, the object to be inspected 10 is qualified.

[0054] When the staff uses the object outer dimension inspection tooling in the present utility model to inspect a large number of objects to be inspected 10, most of the workpieces will be located in the first channel (the third channel 6) and cannot enter the second channel 3 (the fourth channel 7). A small number of workpieces cannot enter the first channel (the third channel 6), and a small number of workpieces can enter the second channel 3 (the fourth channel 7). The staff only needs to perform secondary inspection (i.e., try to shake the workpiece) on the workpieces that enter the second channel 3 (the fourth channel 7), which is more convenient for inspection and saves labor.

[0055] Preferably, in a specific embodiment, the width of the first channel (the third channel 6) satisfies: being equal to the maximum qualified dimension of the object to be inspected 10; a stop step 8 for stopping some qualified workpieces is formed at the junction of the first channel (the third channel 6) and the second channel 3 (the fourth channel 7), and the structure is simple.

[0056] In another specific embodiment, the width of the first channel (the third channel 6) satisfies: the dimension at the connection with the second channel 3 (the fourth channel 7) is equal to the minimum qualified dimension of the object to be inspected 10, and the width of the first channel (the third channel 6) gradually narrows from the opening to the connection with the second channel 3 (the fourth channel 7). The side wall of the first channel (the third channel 6) constitutes a stop portion 4 for stopping some qualified workpieces. The opposite wall surfaces of the opposite side walls of the first channel (the third channel 6) are stop inclined surfaces, and the stop inclined surfaces can also play a role in guiding the workpiece, facilitating the entry of the qualified workpiece with the smallest corresponding dimension into the second channel 3 (the fourth channel 7).

[0057] In yet another specific embodiment, the first channel (the third channel 6) includes a first equal-diameter portion 1 (a second equal-diameter portion) and a first variable-diameter portion 2 (a second variable-diameter portion) that are interconnected. The second channel 3 (the fourth channel 7) is connected to the first variable-diameter portion 2 (the second variable-diameter portion). The width of the first equal-diameter portion 1 (the second equal-diameter portion) satisfies: being equal to the maximum qualified dimension of the object to be inspected 10; the width of the first variable-diameter portion 2 (the second variable-diameter portion) satisfies: the dimension at the connection with the first equal-diameter portion 1 (the second equal-diameter portion) is equal to the maximum qualified dimension of the object to be inspected 10, the dimension at the connection with the second channel 3 (the fourth channel 7) is equal to the minimum qualified dimension of the object to be inspected 10, and the first variable-diameter portion 2 (the second variable-diameter portion) gradually narrows from the connection with the first equal-diameter portion 1 (the second equal-diameter portion) to the connection with the second channel 3 (the fourth channel 7). The side wall of the first variable-diameter portion 2 (the second variable-diameter portion) constitutes a stop portion 4 for stopping some qualified workpieces.

[0058] exist Figure 1 In the specific embodiment shown, one sidewall of the diameter-changing section is an inclined sidewall, and the stop part 4 is only provided on the inclined sidewall on one side of the diameter-changing section. However, in other specific embodiments, both opposite sidewalls of the diameter-changing section are inclined sidewalls, and the stop part 4 is provided on the inclined sidewalls on both sides of the diameter-changing section.

[0059] In other specific embodiments, the first channel (third channel 6) can also be a channel with a width that changes back and forth and is irregular, as long as the width of the narrowest part of the first channel (third channel 6) is not less than the minimum qualified size.

[0060] Preferably, such as Figures 1-2 As shown, the object's external dimensions inspection fixture includes a base, and each dimension inspection area is composed of a groove set on the base, which has a simple structure.

[0061] In other specific embodiments, the object shape and size inspection fixture includes a base, on which upright plates are welded. Each size inspection area is composed of upright plates, and each channel is formed by the space between adjacent upright plates.

[0062] Preferably, such as Figures 1-2 As shown, a handle 9 is also provided on the base or foundation, allowing workers to easily move the object's shape and size inspection fixture using the handle 9.

[0063] It should be noted that when the width of the object 10 to be inspected needs to be inspected simultaneously, the dimensional inspection area also includes a width inspection area, which includes a fifth channel and a sixth channel that are interconnected. The fifth channel is open at one end away from the sixth channel, and the width of this opening is equal to the maximum acceptable size of the object 10 to be inspected, so that objects 10 with corresponding sizes not greater than the maximum acceptable size can enter the fifth channel. The width of the fifth channel is not less than the minimum acceptable size at its narrowest point. The width of the sixth channel is equal to the minimum acceptable size of the object 10 to prevent the smallest acceptable workpiece from shaking in the sixth channel.

[0064] The structures of the fifth and sixth channels can be referred to the structures of the first and second channels 3 above, and will not be repeated here.

[0065] Preferably, such as Figures 1-2 As shown, the dimensional inspection area also includes a guide channel 5. The width at the entrance of the guide channel 5 is greater than the maximum acceptable size of the object to be inspected 10. The width at the exit of the guide channel 5 is equal to the maximum acceptable size of the object to be inspected 10. The exit of the guide channel 5 is connected to the entrance of the first channel. The guide channel 5 gradually narrows from its entrance to its exit. The sidewall of the guide channel 5 forms a guide slope to facilitate the staff to insert the object to be inspected 10 into the first channel.

[0066] Preferably, such as Figures 1-2 As shown, the dimensional inspection area also includes a departure channel 11. The width at the entrance of the departure channel 11 is equal to the minimum acceptable size of the object to be inspected 10, and the width at the exit of the departure channel 11 is greater than the minimum acceptable size of the object to be inspected 10. The entrance of the departure channel 11 is connected to the exit of the second channel. The departure channel 11 gradually widens from its own entrance to its own exit to facilitate the staff to remove the object to be inspected 10 from the dimensional inspection area.

[0067] In actual production, depending on actual needs, the dimensional inspection area of ​​a fixture for inspecting the dimensions of a single object includes at least one of the following: a length inspection area, a width inspection area, and a height inspection area. For example, refer to... Figure 2 As shown, when inspecting the above-mentioned "U"-shaped lifting lug, only one object shape dimension inspection fixture can be used, which includes both a length inspection area and a height inspection area; or, two object shape dimension inspection fixtures can be used, one of which includes only a length inspection area and the other of which includes only a height inspection area. One worker only inspects the length of the object 10 to be inspected and hands the object 10 with the qualified length to another worker, who then only inspects the width of the object 10 and determines whether the object 10 is qualified.

[0068] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An object dimension inspection tool, comprising: The first size inspection area includes a first channel and a second channel which are communicated with each other; The first channel is open at one end away from the second channel, and the width at the opening is equal to the maximum qualified size of the object to be inspected, so that the object to be inspected with the corresponding size not greater than the maximum qualified size enters the first channel; The width of the first channel is not less than the minimum qualified size at the narrowest part; The width of the second channel is equal to the minimum qualified size of the object to be inspected, so as to avoid the qualified workpiece with the minimum corresponding size from shaking in the second channel.

2. The object dimensioning fixture of claim 1, wherein, The width of the first channel is equal to the maximum qualified size of the object to be inspected; and a stop step for stopping the partial qualified workpiece is formed at the junction of the first channel and the second channel.

3. The object dimensioning fixture of claim 1, wherein, The width of the first channel is equal to the minimum qualified size of the object to be inspected at the junction with the second channel, and the width of the first channel gradually narrows from the opening to the junction with the second channel, and the side wall of the first channel constitutes a stop part for stopping the partial qualified workpiece.

4. The object dimensioning fixture of claim 1, wherein, The first channel includes a first constant-diameter part and a first variable-diameter part which are communicated with each other, and the second channel is communicated with the first variable-diameter part; and the width of the first constant-diameter part is equal to the maximum qualified size of the object to be inspected; The width of the first variable-diameter part is equal to the maximum qualified size of the object to be inspected at the junction with the first constant-diameter part, and equal to the minimum qualified size of the object to be inspected at the junction with the second channel, and the first variable-diameter part gradually narrows from the junction with the first constant-diameter part to the junction with the second channel, and the side wall of the first variable-diameter part constitutes a stop part for stopping the partial qualified workpiece.

5. The object dimensioning tool of any one of claims 1 to 4, wherein the at least one light source is a laser. The second size inspection area includes a third channel and a fourth channel which are communicated with each other; The third channel is open at one end away from the fourth channel, and the width at the opening is equal to the maximum qualified size of the object to be inspected, so that the object to be inspected with the corresponding size not greater than the maximum qualified size enters the third channel; The width of the third channel is not less than the minimum qualified size at the narrowest part; The width of the fourth channel is equal to the minimum qualified size of the object to be inspected, so as to avoid the qualified workpiece with the minimum corresponding size from shaking in the fourth channel.

6. The object dimensioning fixture of claim 5, wherein, The width of the third channel is equal to the maximum qualified size of the object to be inspected; and a stop step for stopping the partial qualified workpiece is formed at the junction of the third channel and the fourth channel.

7. The object dimensioning fixture of claim 5, wherein, The width of the third channel is equal to the minimum qualified size of the object to be inspected at the junction with the fourth channel, and the width of the third channel gradually narrows from the opening to the junction with the fourth channel, and the side wall of the third channel constitutes a stop part for stopping the partial qualified workpiece.

8. The object dimensioning fixture of claim 5, wherein, The third channel includes a second constant-diameter part and a second variable-diameter part which are communicated with each other, and the fourth channel is communicated with the second variable-diameter part; and the width of the second constant-diameter part is equal to the maximum qualified size of the object to be inspected; The width of the second variable diameter portion satisfies: the size at the connection with the second constant diameter portion is equal to the maximum qualified size of the object to be inspected, the size at the connection with the fourth channel is equal to the minimum qualified size of the object to be inspected, and the second variable diameter portion gradually narrows from the connection with the second constant diameter portion to the connection with the fourth channel, and the side wall of the second variable diameter portion constitutes a stop portion for stopping the qualified workpiece.

9. The object dimensioning fixture of claim 5, wherein, The third dimension inspection area for inspecting the last one of the length, width and height dimensions of the object to be inspected is also included, and the third dimension inspection area comprises a fifth channel and a sixth channel which are in communication with each other; The fifth channel is open at an end away from the sixth channel, and the width at the opening satisfies: equal to the maximum qualified size of the object to be inspected, so as to enable the object to be inspected with the corresponding dimension not greater than the maximum qualified size to enter the fifth channel; The width of the fifth channel satisfies: not less than the minimum qualified size at the narrowest position; The width of the sixth channel satisfies: equal to the minimum qualified size of the object to be inspected, so as to avoid the qualified workpiece with the minimum corresponding dimension from shaking in the sixth channel.

10. The object dimensioning fixture of claim 9, wherein, The object contour dimension inspection tool comprises a base body, and each dimension inspection area is formed by a groove arranged on the base body.

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