A gauge for detecting the size of a special-shaped workpiece

Abstract

The utility model provides a kind of detection of special-shaped workpiece size gauge, the gauge includes L-shaped base and measuring device;The middle position of the L-shaped base is provided with first through-hole, and the first through-hole is used to install the bolt of connecting the measuring device;The upper surface of the L-shaped base is fixedly provided with a plurality of conical positioning pins, and the conical positioning pin is used to fix special-shaped workpiece.The utility model avoids the problem that special-shaped workpiece cannot be placed horizontally by reasonably designing the structure of base and positioning pin, and the gauge can be more conveniently positioned and fixed special-shaped workpiece, so as to avoid the problem of inaccurate positioning caused by sliding.

Description

Technical Field

[0001] This utility model belongs to the technical field of product testing equipment, and in particular relates to a gauge for detecting the dimensions of irregularly shaped workpieces. Background Technology

[0002] A fixture is a process device used to fasten a workpiece and keep it in the correct relative position. When processing a workpiece, in order to ensure that the surface of the workpiece meets the technical requirements such as dimensions, shape, and relative positional accuracy specified in the drawing, the workpiece must be accurately positioned and clamped before processing to effectively guarantee the accuracy and range of the workpiece's processing or inspection.

[0003] A general-purpose inspection fixture can be used for inspecting various types and models of workpieces. CN109141300A discloses a workpiece positioning device and a workpiece measurement method. The device includes: a fixture body adapted to be sleeved inside the workpiece to be measured, holding the workpiece in place, and the fixture body includes a mounting portion; and a fastener adapted to cooperate with the mounting portion of the fixture body to fix the fixture body on a worktable. Using this fixture can effectively position the workpiece and improve the efficiency of workpiece inspection.

[0004] CN216228039U discloses a positioning fixture for machining retaining rings. The fixture includes a base and an annular boss disposed on the surface of the base. A guide assembly is disposed at the center of the base, with one end of the guide assembly away from the center of the base abutting against the inner wall of the annular boss. At least two positioning pins are provided on the surface of the annular boss. The retaining ring is placed on the surface of the annular boss and limited by the positioning pins. The guide assembly is used to maintain the coaxiality of the annular boss and the retaining ring. The fixture provides accurate positioning, is simple to operate, and effectively solves the problem of concentric alignment with the lathe spindle during the machining of one-piece PPS retaining rings.

[0005] The inspection fixtures disclosed above can usually be used as general-purpose fixtures for positioning and clamping workpieces. However, for irregularly shaped workpieces, such as those with a cast bottom surface that is rough and uneven, and which cannot be placed horizontally for inspection, it is necessary to change the inspection fixture to adapt to the size, structure and other requirements of the irregularly shaped workpiece.

[0006] In summary, how to provide a gauge for irregularly shaped workpieces that allows for horizontal placement and inspection, improves inspection efficiency, reduces the time required for manually establishing a coordinate system, and is applicable to the dimensional inspection of specific irregularly shaped workpieces has become an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a gauge for detecting the dimensions of irregularly shaped workpieces. By rationally designing the structure of the base and positioning pins, the problem of irregularly shaped workpieces being unable to be placed horizontally is avoided. The gauge can more easily position and fix irregularly shaped workpieces, thereby avoiding the problem of inaccurate positioning caused by slippage.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] This utility model provides a gauge for detecting the dimensions of irregularly shaped workpieces, the gauge including an L-shaped base and a measuring device;

[0010] The L-shaped base has a first through hole in the middle, which is used to install bolts for connecting the measuring device.

[0011] The upper surface of the L-shaped base is fixedly provided with several tapered positioning pins, which are used to fix irregularly shaped workpieces.

[0012] The inspection fixture provided by this utility model has an L-shaped base fixed to the measuring device with bolts, which can be disassembled when not in use. The conical positioning pin design allows for smoother insertion into the mounting holes of irregularly shaped workpieces, and the conical shape provides stability, automatically guiding the workpiece during installation and facilitating its positioning and fixing, thus preventing slippage and inaccurate positioning. For irregularly shaped workpieces with protrusions on both the top and bottom, the L-shaped base is designed to match the protrusions with the cavity of the L-shaped base, preventing the workpiece from being unable to be placed horizontally. Using the inspection fixture provided by this utility model improves inspection efficiency and accuracy, reduces the error rate, and is suitable for the dimensional inspection of specific types of irregularly shaped workpieces.

[0013] As a preferred technical solution of this utility model, the L-shaped base and the irregular workpiece are fitted with a tapered locating pin through a clearance fit.

[0014] In this invention, the L-shaped base and the irregular workpiece are fitted with a tapered positioning pin, which allows the irregular workpiece to be placed stably on the base, thereby shortening the time required to manually establish the coordinate system.

[0015] As a preferred technical solution of this utility model, the taper of the tapered positioning pin is 1:30 to 1:50, for example, it can be 1:32, 1:35, 1:37, 1:40, 1:42, 1:45, 1:47 or 1:49, etc., but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0016] In this invention, by controlling the taper of the tapered locating pin within a specific range, the automatic guiding function of the locating pin can be further controlled, enabling the locating pin to be vertically inserted into the second through hole of the irregular workpiece, and further ensuring the clearance fit between the locating pin and the irregular workpiece after installation.

[0017] As a preferred technical solution of this utility model, there are at least 3 tapered positioning pins, for example, there can be 3, 4 or 5, etc.

[0018] As a preferred technical solution of this utility model, the tapered positioning pin is inserted into the second through hole of the irregular workpiece.

[0019] In this invention, there are at least three second through holes, and the number of tapered positioning pins matches the number of second through holes on the irregularly shaped workpiece.

[0020] As a preferred embodiment of this invention, the length of the tapered positioning pin is less than the height of the second through hole.

[0021] As a preferred embodiment of this invention, the length of the bolt is less than the height of the first through hole.

[0022] In this invention, by controlling the length of the bolt to be less than the height of the first through hole, the bolt is prevented from protruding above the surface of the first through hole, thus preventing irregularly shaped workpieces from being placed horizontally on the L-shaped base.

[0023] As a preferred technical solution of this utility model, the L-shaped base is further provided with several fixing plates, which are used to fix irregularly shaped workpieces.

[0024] As a preferred technical solution of this utility model, there are at least two fixing plates, such as two, three or four, etc.

[0025] As a preferred technical solution of this utility model, the measuring device includes a coordinate measuring machine.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This utility model provides a gauge for inspecting the dimensions of irregularly shaped workpieces. Through its conical locating pin design, the pin can be smoothly inserted into the mounting hole of the workpiece. The conical shape provides stability and automatically guides the workpiece during installation, facilitating precise positioning and fixing, thus preventing slippage and inaccurate positioning. For irregularly shaped workpieces with protrusions on both the top and bottom, an L-shaped base is designed to match the protrusions with the cavity of the base, preventing the workpiece from being placed horizontally. Using this gauge improves inspection efficiency and accuracy, reduces the error rate, and is suitable for inspecting the dimensions of specific types of irregularly shaped workpieces. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the L-shaped base provided in Example 1;

[0029] Figure 2 for Figure 1 Enlarged view of the conical locating pin;

[0030] Figure 3 This is a structural schematic diagram of the irregularly shaped workpiece provided in Example 1;

[0031] Figure 4 This is a top view of the L-shaped base and the irregularly shaped workpiece after assembly, as provided in Example 1.

[0032] Among them, 1-L-shaped base, 2-first through hole, 3-tapered positioning pin, 4-fixing plate, 5-irregular workpiece, 6-second through hole. Detailed Implementation

[0033] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] This embodiment provides a method for detecting irregularly shaped workpieces (see schematic diagram). Figure 3 A gauge of the dimensions shown, the gauge including an L-shaped base 1 (see schematic diagram). Figure 1 (as shown) and measuring device;

[0038] The L-shaped base 1 has a first through hole 2 at the middle position, and the first through hole 2 is used to install a bolt for connecting the measuring device; the length of the bolt is less than the height of the first through hole 2.

[0039] Five tapered positioning pins 3 are fixedly installed on the upper surface of the L-shaped base 1 (see schematic diagram). Figure 2 As shown in the diagram, the tapered locating pin 3 is inserted into the second through hole 6 of the irregularly shaped workpiece 5; the L-shaped base 1 and the irregularly shaped workpiece 5 are fitted with a clearance through the tapered locating pin 3 (top view shown in the diagram). Figure 4 (as shown);

[0040] The L-shaped base 1 is also provided with two fixing plates 4, which are used to fix the irregular workpiece 5.

[0041] Using the fixture provided in this embodiment to support and secure irregularly shaped workpieces not only allows the workpieces to be placed stably on the fixture, shortening the adjustment time of the measuring device, but also enables batch inspection. Furthermore, the inspection accuracy of irregularly shaped workpieces is improved compared to using non-customized fixtures, and all dimensional features of irregularly shaped workpieces can be detected.

[0042] Example 2

[0043] This embodiment provides a gauge for detecting the dimensions of irregularly shaped workpieces. Except that the taper of the tapered locating pin is further limited to 1:30 and the length of the tapered locating pin is less than the height of the second through hole, all other conditions are the same as in Embodiment 1.

[0044] Using the fixture provided in this embodiment to support and secure irregularly shaped workpieces not only allows the workpieces to be placed stably on the fixture, shortening the adjustment time of the measuring device, but also enables batch inspection. Furthermore, the inspection accuracy of irregularly shaped workpieces is improved compared to using non-customized fixtures, and all dimensional features of irregularly shaped workpieces can be detected.

[0045] Example 3

[0046] This embodiment provides a gauge for detecting the dimensions of irregularly shaped workpieces. Except for further specifying that the measuring device is a coordinate measuring machine, all other conditions are the same as in Embodiment 1.

[0047] Using the fixture provided in this embodiment to support and secure irregularly shaped workpieces not only allows the workpieces to be placed stably on the fixture, shortening the time for manually establishing the coordinate system, but also enables batch inspection. Furthermore, the inspection accuracy of irregularly shaped workpieces is improved compared to using non-customized fixtures, and all dimensional features of irregularly shaped workpieces can be inspected.

[0048] Example 4

[0049] This embodiment provides a gauge for detecting the dimensions of irregularly shaped workpieces, the gauge including an L-shaped base and a measuring device;

[0050] The L-shaped base has a first through hole in the middle, which is used to install a bolt for connecting the measuring device; the length of the bolt is less than the height of the first through hole.

[0051] Four tapered locating pins are fixedly provided on the upper surface of the L-shaped base. The tapered locating pins are inserted into the second through hole of the irregular workpiece. The length of the tapered locating pin is less than the height of the second through hole. The L-shaped base and the irregular workpiece are fitted with a clearance through the tapered locating pins.

[0052] The L-shaped base is also provided with four fixing plates, which are used to fix irregularly shaped workpieces.

[0053] Using the fixture provided in this embodiment to support and secure irregularly shaped workpieces not only allows the workpieces to be placed stably on the fixture, shortening the adjustment time of the measuring device, but also enables batch inspection. Furthermore, the inspection accuracy of irregularly shaped workpieces is improved compared to using non-customized fixtures, and all dimensional features of irregularly shaped workpieces can be detected.

[0054] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A gauge for detecting the size of a profiled workpiece, characterised in that, The inspection fixture includes an L-shaped base and a measuring device; The L-shaped base has a first through hole in the middle, which is used to install bolts for connecting the measuring device. The upper surface of the L-shaped base is fixedly provided with several tapered positioning pins, which are used to fix irregularly shaped workpieces.

2. The gauge for detecting the size of a profiled workpiece according to claim 1, wherein The L-shaped base and the irregularly shaped workpiece are fitted together with a tapered locating pin.

3. The gauge of claim 1, wherein, The taper of the tapered locating pin is 1:30 to 1:

50.

4. The gauge of claim 1, wherein, The number of tapered locating pins is at least three.

5. The gauge of claim 1, wherein, The tapered locating pin is inserted into the second through hole of the irregularly shaped workpiece.

6. The gauge of claim 5 wherein, The length of the tapered locating pin is less than the height of the second through hole.

7. The gauge of claim 1 wherein, The length of the bolt is less than the height of the first through hole.

8. The gauge of claim 1, wherein, The L-shaped base is also provided with several fixing plates, which are used to fix irregularly shaped workpieces.

9. The gauge of claim 8 wherein, There are at least two fixing plates.

10. The gauge of claim 1, wherein, The measuring device includes a coordinate measuring machine.

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