Special-shaped part detection device and method

Abstract

The invention discloses a special-shaped part detection device and method, is used for solving the technical problem that the assembly qualification rate of a lens and a lens hoop is low because the size of a convex rib in a lens sealing groove and the size of the elastic lens hoop cannot be detected by adopting a conventional detection mode, and belongs to the technical field of special-shaped part detection. The device comprises a detection table, a dial indicator zeroing device, dial indicator positioning devices, a positioning device and a dial indicator placing box, the dial indicator zeroing device is arranged in the middle of the upper side of the detection table, the number of the dial indicator positioning devices on the detection table is three, a sleeve is arranged at the top of each dial indicator positioning device, and the bottom of each dial indicator positioning device is fixed to the detection table. The dial indicator just corresponds to a detection position of the special-shaped part after being sleeved with a sleeve of the dial indicator positioning device, the positioning device positions the special-shaped part so that the special-shaped part can be measured conveniently after the sleeve of the dial indicator positioning device is sleeved with the dial indicator, and the dial indicator containing box is arranged in the middle of the lower side of the detection table.

Description

Technical Field

[0001] This invention belongs to the field of non-standard parts inspection technology, and specifically relates to a non-standard parts inspection device and method. Background Technology

[0002] Gas masks are mainly composed of the mask body, eye windows, secondary intercom, canister connector and main intercom. Air tightness is one of the key performance characteristics of this product. During the production process, the air tightness qualification rate of the eye window part of the gas mask is low, which is a bottleneck and weak link in the gas mask assembly process, seriously affecting the production progress and product quality.

[0003] The eye window of a gas mask consists of a lens, a lens clamp, screws, and nuts. The sealing principle of the eye window is as follows: a sealing ring is designed on the mask body corresponding to the eye window. The mask body sealing ring is assembled into the corresponding sealing groove of the lens. There is a raised rib with a height of about 0.5mm in the middle of the bottom of the lens sealing groove. There is an interface position on the outside of the lens clamp. During assembly, screws and nuts are used to lock it, forming a closed clamp ring, which compresses the mask body eye window sealing ring, so that it achieves a line seal with the lens and lens clamp.

[0004] To ensure the airtightness of the eyepiece meets the specified technical requirements after assembly, the shape of the raised rib at the bottom of the lens sealing groove must be completely consistent with the corresponding shape of the lens clamp, and their dimensions must match. This ensures both a seamless assembly of the lens clamp and an airtight eyepiece. However, since both the lens and the lens clamp are irregularly shaped parts, the fit dimension of the lens is the size of the raised rib, which is approximately 0.5mm high inside the groove at the bottom. This groove is small (6mm wide and 5mm high), and the lens is made of transparent material. Commonly used calipers, micrometers, projections, and 3D inspection methods cannot detect this raised rib size. The lens clamp is also an irregularly shaped part, and its material has high elasticity. Commonly used inspection methods such as calipers, micrometers, and projections cannot detect it, and 3D inspection is relatively complex and not suitable for mass production testing.

[0005] Currently, the compatibility of parts is mainly ensured through trial assembly and control of lens and lens clamp processes. Specifically, before each batch of production, a small number of lenses and lens clamps are trial-produced for mask trial assembly. After passing appearance and airtightness tests, mass production is organized according to the trial-produced process. This trial-assembly method has disadvantages: firstly, the production cycle is long, which is not conducive to organizing mass production; secondly, process fluctuations or abnormalities during production may result in parts with out-of-tolerance dimensions. Since the parts are not inspected, defective products cannot be detected, and they flow to the final assembly process, making the assembly of the gas mask eye windows a bottleneck and weak point in the assembly process. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for inspecting irregularly shaped parts, which solves the technical problem that conventional inspection methods cannot detect the dimensions of protruding ribs in the sealing groove of lenses and the dimensions of elastic lens clamps, resulting in a low qualification rate of lens and lens clamp assembly.

[0007] This invention is achieved using the following technical solution: A device for inspecting irregularly shaped parts includes a testing table, a dial indicator zeroing device, a dial indicator positioning device, a positioning device, and a dial indicator placement box. The dial indicator zeroing device is located on the upper center of the testing table. Three dial indicator positioning devices are arranged on the testing table, each with a sleeve at the top and fixed to the testing table at the bottom. When the dial indicator is fitted into the sleeve of the positioning device, it corresponds precisely to the inspection position of the irregularly shaped part. The positioning device positions the irregularly shaped part, facilitating measurement after the dial indicator's sleeve is fitted onto the dial indicator. The dial indicator placement box is located on the lower center of the testing table. In application, the dial indicator zeroing device is used to zero the dial indicator, the dial indicator storage box is used to store the dial indicator, the positioning device is used to position irregular parts, and the dial indicator is inserted into the sleeve of the dial indicator positioning device to monitor the positioned irregular parts.

[0008] Preferably, the testing platform and the dial indicator zeroing device are made of aluminum alloy. The testing platform is used to install the relevant testing components; the dial indicator zeroing device is used to zero the dial indicator.

[0009] Preferably, the dial indicator positioning device is made of aluminum alloy and is fixed to the testing table with screws. The dial indicator positioning device is used to accurately position the dial indicator and test the specified dimensions of the part.

[0010] Further preferably, the testing platform also includes handles, which are located on both sides of the testing platform. The handles are made of aluminum alloy and are covered with rubber sleeves. The handles are used for handling the irregularly shaped parts testing device.

[0011] More preferably, the positioning device includes positioning clamps, three of which are arranged on the testing table. The positioning clamps are fixed on a clamp base, and both the positioning clamps and the clamp base are made of stainless steel. The positioning clamps are adjusted to a suitable height via the clamp base, and the positioning clamps are fixed to the clamp base by screws. The clamp base is also fixed to the testing table by screws.

[0012] Preferably, the portion of the positioning clamp that contacts the irregularly shaped part is bonded with low-elasticity rubber, and the handle portion of the positioning clamp is covered with a rubber sleeve. The side of the positioning clamp closer to the irregularly shaped part is the side that contacts the irregularly shaped part, and the side farther away from the irregularly shaped part is the handle portion.

[0013] Further preferably, the positioning device further includes a part positioning fixture, which includes a first positioning platform, a second positioning platform, and a third positioning platform, each positioned directly in front of each positioning clamp. The first positioning platform has a boss on its top to correspond to the groove on the irregular part. The top shape of the second positioning platform is the same as the shape of the contact part of the irregular part. The third positioning platform is equipped with a positioning spring clamp. The part positioning fixture, the positioning clamps, and the positioning spring clamp work together to accurately fix the irregular part. The part positioning fixture is made of aluminum alloy and is fixed to the inspection table with screws. The positioning spring clamp is also made of aluminum alloy.

[0014] More preferably, the testing platform also includes leveling screws, which are located at the four corners of the testing platform. The testing platform is leveled by turning the leveling screws.

[0015] A method for inspecting irregularly shaped parts, implemented using any of the aforementioned irregularly shaped parts inspection devices, includes the following steps: Step 1: Secure the irregularly shaped parts accurately using the positioning device; Step 2: Place the dial indicator into the dial indicator zeroing device to zero it; Step 3: Insert the dial indicator into the sleeve of the dial indicator positioning device in sequence, check the inspection points of the irregular part, and then read the values; Step 4: After reading the value, compare it with the specified tolerance. If the value exceeds the tolerance range, the irregular part is deemed unqualified. When reading the value with a dial indicator, a positive value is greater than the standard value, and a negative value is less than the standard value. This invention designs a detection device that can detect the dimensions of irregularly shaped parts such as lenses and eye clips, so as to remove parts that do not meet the requirements, improve the pass rate of parts, and thus improve the pass rate of finished gas masks. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the irregular part inspection device of the present invention.

[0019] In the diagram: 1-Testing table, 2-Dial indicator zeroing device, 3-Dial indicator positioning device, 4-Handle, 5-Positioning clamp, 6-Clamping base, 7-Part positioning jig, 71-Positioning table one, 72-Positioning table two, 73-Positioning table three, 8-Positioning spring clamp, 9-Dial indicator placement box, 10-Adjusting level screw. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0021] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0023] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0024] A device for inspecting irregularly shaped parts includes a testing platform 1, a dial indicator zeroing device 2, a dial indicator positioning device 3, a positioning device, and a dial indicator placement box 9. The dial indicator zeroing device 2 is located on the upper middle part of the testing platform 1. Three dial indicator positioning devices 3 are provided on the testing platform 1. The top of the dial indicator positioning device 3 is a sleeve, and the bottom is fixed on the testing platform 1. After the dial indicator is fitted into the sleeve of the dial indicator positioning device 3, it corresponds exactly to the inspection position of the irregularly shaped part. The positioning device positions the irregularly shaped part, which is convenient for measuring the irregularly shaped part after the sleeve of the dial indicator positioning device 3 is fitted into the dial indicator. The dial indicator placement box 9 is located on the lower middle part of the testing platform 1.

[0025] The testing station 1 and the dial indicator zeroing device 2 are made of aluminum alloy.

[0026] The dial indicator positioning device 3 is made of aluminum alloy and is fixed to the testing table 1 with screws.

[0027] The testing table 1 also includes handles 4, which are located on both sides of the testing table 1. The handles 4 are made of aluminum alloy and are covered with rubber sleeves.

[0028] The positioning device includes positioning clamps 5. Three positioning clamps 5 are installed on the inspection table 1. The positioning clamps 5 are fixed on the clamp base 6. The positioning clamps 5 and the clamp base 6 are made of stainless steel. The positions of the dial indicator positioning device 3 and the positioning clamps 5 on the inspection table 1 correspond to the positions of the irregular parts that need to be inspected.

[0029] The positioning clamp 5 has a low-elasticity rubber bonded to the part that contacts the irregular part, and the hand grip of the positioning clamp 5 is covered with a rubber sleeve.

[0030] The positioning device also includes a part positioning fixture 7, which comprises a first positioning platform 71, a second positioning platform 72, and a third positioning platform 73, each positioned directly in front of each positioning clamp 5. The first positioning platform 71 has a protrusion on its top to correspond to the groove on the irregular part. The top shape of the second positioning platform 72 is the same as the shape of the contact part of the irregular part. The third positioning platform 73 is equipped with a positioning spring clamp 8. When fixing the irregular part, the groove of the irregular part is aligned with the protrusion on the first positioning platform 71 and the second positioning platform 72. Then, the irregular part is clamped onto the positioning fixture by the positioning spring clamp 8, and the positioning clamp 5 is used to further fix the irregular part in position.

[0031] The testing table 1 also includes leveling screws 10, which are located at the four corners of the testing table 1.

[0032] Specifically, to improve testing efficiency, two sets of testing components can be set up on testing station 1 to simultaneously test a pair of lenses or lens clamps. Example 2

[0033] A method for inspecting irregularly shaped parts, implemented using an irregularly shaped parts inspection device according to Embodiment 1, includes the following steps: Step 1: Secure the irregularly shaped parts accurately using the positioning device; Step 2: Place the dial indicator into the dial indicator zeroing device 2 to zero it; Step 3: Insert the dial indicator into the sleeve of the dial indicator positioning device 3 in sequence, check the detection points of the irregular part, and then read the values; Step 4: After reading the value, compare it with the specified tolerance. If the value exceeds the tolerance range, the irregular part is deemed unqualified.

[0034] The working principle of this method is as follows: Step 1: Clean the irregular part inspection device, place the lens or lens clamp on the part positioning jig 7, and clamp the part with the positioning spring clamp 8, and then fix it with the positioning clamp 5. This completes the product positioning. Step 2: After removing the digital dial indicator from the dial indicator placement box 9, place it into the dial indicator zeroing device 2 to zero it; Step 3: Insert the dial indicator into the three sleeves of the dial indicator positioning device in sequence to check the inspection points of the irregular part, and then read the values; Step 4: After reading the value, compare it with the specified tolerance. If the value exceeds the tolerance range, the irregular part is deemed unqualified.

[0035] Step 5: After the lens or lens clamp has been inspected, put all components back in their original positions.

[0036] The present invention has the following advantages: 1. Can quickly detect specified dimensions of irregularly shaped parts; 2. Simple to operate; 3. The test values ​​are accurate; 4. Suitable for mass production use; 5. It can be widely used for the inspection of special dimensions of various irregular-shaped parts.

[0037] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A device for inspecting irregularly shaped parts, characterized in that: The instrument includes a testing platform (1), a dial indicator zeroing device (2), a dial indicator positioning device (3), a positioning device, and a dial indicator placement box (9). The dial indicator zeroing device (2) is located on the upper middle part of the testing platform (1). There are three dial indicator positioning devices (3) on the testing platform (1). The top of the dial indicator positioning device (3) is set as a sleeve, and the bottom is fixed on the testing platform (1). After the dial indicator is put into the sleeve of the dial indicator positioning device (3), it corresponds to the testing position of the irregular part. The positioning device positions the irregular part, so that the dial indicator positioning device (3) can measure the irregular part after the sleeve is put into the dial indicator. The dial indicator placement box (9) is located on the lower middle part of the testing platform (1).

2. The irregular part inspection device according to claim 1, characterized in that: The testing station (1) and the dial indicator zeroing device (2) are made of aluminum alloy.

3. The irregular part inspection device according to claim 1, characterized in that: The dial indicator positioning device (3) is made of aluminum alloy and is fixed to the testing table (1) with screws.

4. The irregular part inspection device according to claim 1, characterized in that: The testing platform (1) also includes a handle (4), which is located on both sides of the testing platform (1). The handle (4) is made of aluminum alloy and is covered with a rubber sleeve.

5. The irregular part inspection device according to claim 1, characterized in that: The positioning device includes positioning clamps (5), three of which are provided on the testing table (1). The positioning clamps (5) are fixed on the clamp base (6), and the positioning clamps (5) and the clamp base (6) are made of stainless steel.

6. The irregular part inspection device according to claim 5, characterized in that: The positioning clamp (5) has a low-elasticity rubber bonded to the part that contacts the irregular part, and the hand grip of the positioning clamp (5) is covered with a rubber sleeve.

7. The irregular part inspection device according to claim 6, characterized in that: The positioning device also includes a part positioning fixture (7), which includes a positioning platform one (71), a positioning platform two (72), and a positioning platform three (73), each of which is located in front of each positioning clamp (5). The top of the positioning platform one (71) is provided with a boss to correspond to the groove on the irregular part. The top shape of the positioning platform two (72) is the same as the shape of the contact part of the irregular part. The positioning platform three (73) is provided with a positioning spring clamp (8).

8. A non-standard parts inspection device according to any one of claims 1-7, characterized in that: The testing platform (1) also includes leveling screws (10), which are located at the four corners of the testing platform (1).

9. A method for inspecting irregularly shaped parts, characterized in that, This is achieved using any one of the irregular part inspection devices according to claims 1-8, and includes the following steps: Step 1: Secure the irregularly shaped parts accurately using the positioning device; Step 2: Place the dial indicator into the dial indicator zeroing device (2) to zero it; Step 3: Insert the dial indicator into the sleeve of the dial indicator positioning device (3) in sequence, check the detection points of the irregular parts, and then read the values; Step 4: After reading the value, compare it with the specified tolerance. If the value exceeds the tolerance range, the irregular part is deemed unqualified.

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