Chain shell matching relative position precision detection and calibration method and device

Abstract

The invention provides a chain shell matching relative position precision detection and calibration method and device, and belongs to the technical field of aviation. In the device, gauges are fixedly installed at the upper end and the lower end of a center table; the conical sleeve is fixedly connected with the central table and is coaxial and has the same diameter with the through hole of the central table; the telescopic actuating cylinder is of a hollow cylindrical structure and is matched with the front end of the telescopic actuating rod; the rear end of the telescopic actuating rod is connected with a handle; a middle boss of the telescopic actuating rod extends into a groove of the conical sleeve; the clamping ring is arranged on the lower end gauge and is fixedly connected with the telescopic actuating cylinder; when the handle is rotated anticlockwise, the telescopic actuating rod is screwed into the telescopic actuating cylinder, the telescopic actuating cylinder retreats, and the distance between the nose head rectangular block and the rectangular ruler step is reduced; when the handle is rotated clockwise, the telescopic actuating rod is screwed out of the telescopic actuating cylinder, the telescopic actuating cylinder moves forwards, and the distance between the nose head rectangular block and the rectangular ruler step is increased; the nose head rectangular block is located on the opposite side of the clamping ring at the foremost end of the telescopic actuator cylinder. The method can replace a traditional multi-time measurement reading method, and improves the efficiency and precision.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology, and in particular relates to a method and a device for precise detection and calibration of the relative position of a chain housing. Background Art

[0002] In industrial assembly, strip-shaped shell products such as metal cosmetic bottles and various gas tanks are often assembled into sequences by fixing and connecting with chains, which serve as preliminary assemblies for subsequent further connection processing or continuous use. The relative position of strip-shaped shell products and chains is crucial. If the relative position of strip-shaped shell products and chains is not accurate enough, and the relative size is not within the tolerance range, the product may get stuck during subsequent continuous processing or use. If the jam is serious, it will endanger the safety of the processing machine or operator. Therefore, in order to accurately ensure that the relative position of strip-shaped shell products and chains is accurate and the relative size is within the tolerance range, it is generally necessary to use two special gauges of different sizes to measure after the initial assembly is completed. Generally, the size between the bottom plane of the shell and the flange of the chain is measured, which is called the chain shell distance. The large gauge measurement shows whether the chain shell distance is greater than the tolerance range, and the small gauge measurement shows whether the chain shell distance is less than the tolerance range. If the chain shell distance is within the tolerance range, it is qualified. If the chain shell distance is greater than or less than the tolerance range, the relative position of the chain shell needs to be adjusted. If the chain shell distance is greater than the tolerance range, a wooden hammer is generally used to tap the shell into a deeper position of the chain. If the chain shell distance is less than the tolerance range, the shell is generally unloaded and then pressed again.

[0003] Whether using large or small special gauges to measure the chain shell distance or the traditional method of adjusting the relative position of the chain shell, both methods are very time-consuming and labor-intensive. Moreover, the traditional method of adjusting the relative position of the chain shell is a rough adjustment, which is not accurate enough and may result in repeated situations. Summary of the invention

[0004] In order to solve the problem of low efficiency and inaccuracy in measuring the chain shell distance in the prior art, the present invention provides a method and device for precise detection and calibration of the relative position of the chain shell, which adopts an intuitive one-time measurement method to replace the traditional multiple measurement reading method, which not only improves efficiency but also reduces human errors, and changes the traditional method of adjusting the relative position of the chain shell, which is rough, inaccurate, and may be repeated, time-consuming and labor-intensive. It is scientific and practical, and improves efficiency and accuracy. The technical solution is as follows:

[0005] In the first aspect, a device for precise detection and calibration of relative position of chain housing is provided, comprising: a nose rectangular block 100, a telescopic actuator 200, a gauge 300, a clamping ring 400, a center table 500, a conical sleeve 600, a telescopic actuator rod 700, and a handle 800;

[0006] The gauge 300 is mounted and fixed on the upper and lower ends of the center platform 500;

[0007] The conical sleeve 600 is fixedly connected to the center platform 500 and is coaxial and of the same diameter as the through hole of the center platform 500; the telescopic actuator cylinder 200 is a hollow cylindrical structure with a built-in thread, which cooperates with the front thread of the telescopic actuator rod 700; the rear end of the telescopic actuator rod 700 is connected to the handle 800, and the middle boss of the telescopic actuator rod 700 extends into the groove of the conical sleeve 600, ensuring that the telescopic actuator rod 700 can only rotate around its axis but cannot slide;

[0008] The snap ring 400 is arranged on the gauge 300 at the lower end and is fixedly connected to the telescopic actuator 200;

[0009] When the handle 800 is rotated counterclockwise, the telescopic actuator rod 700 is screwed into the telescopic actuator cylinder 200. Since the telescopic actuator rod 700 is limited by the conical sleeve 600, the telescopic actuator cylinder 200 moves backward, and the distance between the nose rectangular block 100 and the rectangular ruler step becomes smaller; when the handle 800 is rotated clockwise, the telescopic actuator rod 700 is screwed out of the telescopic actuator cylinder 200. Since the telescopic actuator rod 700 is limited by the conical sleeve 600, the telescopic actuator cylinder 200 moves forward, and the distance between the nose rectangular block 100 and the rectangular ruler step becomes larger;

[0010] The nose rectangular block 100 is arranged on the opposite side of the front end clamping ring 400 of the telescopic actuator 200. Its main function is to use the nose rectangular block 100 to clamp the front flange of the card chain when the distance between the bottom end of the strip shell and the rear flange of the card chain is greater than the upper limit of the tolerance, that is, when the distance between the bottom end of the strip shell and the rear flange of the card chain is too large.

[0011] Optionally, the gauge 300 is composed of a small rectangular ruler 301, an upper tolerance limit line 302, a lower tolerance limit line 303, a large rectangular ruler 304, and a fork-shaped bottom plate 305.

[0012] The large rectangular ruler 304 is vertically mounted and fixed on the fork-shaped base plate 305, and the large rectangular ruler 304 is flush with the top of the fork-shaped base plate 305; the small rectangular ruler 301 is an extension of the large rectangular ruler 304, with the lower tolerance limit line 303 as the boundary, and a rectangular ruler step is formed between the small rectangular ruler 301 and the large rectangular ruler 304 due to the height difference; the fork-shaped base plate 305 is designed as a fork-shaped structure; the upper tolerance limit line 302 is located at the front end of the lower tolerance limit line 303, the two are parallel, and the two remain parallel to the fork-shaped base plate 305 to ensure measurement accuracy.

[0013] Optionally, the upper tolerance limit line 302 , the lower tolerance limit line 303 , the clamping ring 400 , and the fork-shaped base plate 305 are perpendicular to the main axis of the device.

[0014] Among them, the center platform 500 serves as the middle installation point of the entire device. It is a square boss with an outer contour of a side length L, an inner contour of a through tube with a diameter Q, a thickness of 0.5L, L is 1 to 2 cm, and Q is smaller than L. The function is that the inner contour of the square boss can accommodate the telescopic actuator to slide inside it, and the size of the square boss is not too large, making the entire structure more compact.

[0015] Among them, the telescopic actuator cylinder 200, the telescopic actuator rod 700, the through hole of the center platform 500, the tapered sleeve 600, and the handle 800 are coaxial, and this axis is the main axis of the device.

[0016] Furthermore, the surface of the handle 800 is provided with anti-skid patterns to prevent slipping.

[0017] Among them, the snap ring 400 is arranged at the front end of the fork-shaped bottom plate 305 at the lower end. Its main function is to clamp the bottom boss of the strip shell when the distance between the bottom end of the strip shell and the rear flange of the clip chain is less than the lower limit of the tolerance, that is, when the distance between the bottom end of the strip shell and the rear flange of the clip chain is too small.

[0018] In a second aspect, a method for accurately detecting and calibrating the relative position of a chain shell is provided, which is used in any device described in the first aspect, and the method comprises the following steps:

[0019] Step 1. When in use, the non-circlip 400 side is preferentially used to detect the relative position of the chain shell, and the distance between the bottom end of the strip shell and the rear flange of the chain is measured to see whether it is greater than the lower tolerance limit and less than the upper tolerance limit: first, the fork-shaped bottom plate 305 is completely fitted to the bottom end of the strip shell, and the main axis of the device is kept parallel to the axis of the strip shell, and it is determined whether the rear edge of the rear flange of the chain is between the upper tolerance limit line 302 and the lower tolerance limit line 303. If so, the relative position of the chain shell is qualified. If the rear edge of the rear flange of the chain is before the upper tolerance limit line 302, the relative position of the chain shell is too large, and a shell pushing operation is required, and step 3 is executed; if the rear flange of the chain interferes with the large rectangular ruler 304, or the fork-shaped bottom plate 305 cannot fit the bottom end of the strip shell when the rectangular ruler step is against the rear flange of the chain, the relative position of the chain shell is too small, and a shell pulling operation is required, and step 2 is executed;

[0020] Step 2: Use the rectangular step of the side gauge 300 to press against the rear flange of the card chain, turn the handle 800 counterclockwise, and the telescopic actuator 200 moves backward with the snap ring 400, and slightly pull the bar shell backward out of the card chain. When the bottom end of the bar shell is completely fitted with the fork-shaped bottom plate 305 on this side, make sure that the distance between the bottom end of the bar shell and the rear flange of the card chain is just to the lower limit of the tolerance. This step is the shell pulling operation;

[0021] Step 3: Use the fork-shaped bottom plate 305 of the side gauge 300 to stick to the bottom end of the strip housing, turn the handle 800 counterclockwise, the telescopic actuator 200 moves the nose rectangular block 100 backward, the fork-shaped bottom plate 305 pushes the strip housing forward, and pushes the strip housing backward slightly into the clamping chain. When the rectangular ruler step on this side completely abuts against the rear flange of the clamping chain, it is determined that the distance between the bottom end of the strip housing and the rear flange of the clamping chain is just to the upper limit of the tolerance. This step is the shell pushing operation.

[0022] The beneficial effects of the present invention are at least:

[0023] (1) A special gauge based on the specific usage scenario of chain shell distance measurement is provided, and an intuitive one-time measurement method is used to replace the traditional multiple measurement reading method, which not only improves efficiency but also reduces human errors.

[0024] (2) Provide a method for accurately adjusting the relative position of the chain shell, which changes the traditional method of adjusting the relative position of the chain shell, which is rough, imprecise, and may be repeated, time-consuming and labor-intensive. While being scientific, it also enhances practicality, improves efficiency, and improves accuracy.

[0025] (3) The device of the present invention has a simple structure, low manufacturing complexity, simple usage, clear and easy-to-understand usage logic, small size and light weight, and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the gauge of the present invention;

[0028] Figure 3 This is a schematic diagram of the shell pushing operation of the present invention;

[0029] Figure 4 It is a schematic diagram of the shell pulling operation of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below through specific implementation modes and drawings.

[0031] An embodiment of the present invention provides a device for accurately detecting and calibrating the relative position of the chain shell, see Figure 1 The device includes: a nose rectangular block 100, a telescopic actuator 200, a gauge 300, a clamping ring 400, a center table 500, a conical sleeve 600, a telescopic actuator rod 700, and a handle 800. Among them:

[0032] The gauge 300 is composed of a small rectangular ruler 301 , an upper tolerance limit line 302 , a lower tolerance limit line 303 , a large rectangular ruler 304 , and a fork-shaped base plate 305 .

[0033] Specifically, the system device composition relationship and main functions are as follows:

[0034] The device of the present invention is mainly composed of two parts: a static part and a dynamic part. Figure 1 The static parts are the center table 500, the gauge 300, and the tapered sleeve 600, and the dynamic parts are the nose rectangular block 100, the telescopic actuator cylinder 200, the clamping ring 400, the telescopic actuator rod 700, and the handle 800.

[0035] The center platform 500 serves as the middle installation point of the entire device. The center platform 500 is a square boss with an outer contour of a side length L, an inner contour of a through tube with a diameter Q, and a thickness of 0.5L. Generally, L is selected to be 1 to 2 cm, and Q can be slightly smaller than L.

[0036] The core measuring component of the device is the gauge 300, which is fixed at the upper and lower ends of the center platform 500. Figure 2 As shown, the gauge 300 is composed of a small rectangular ruler 301, an upper tolerance limit line 302, a lower tolerance limit line 303, a large rectangular ruler 304, and a forked bottom plate 305. The large rectangular ruler 304 is vertically mounted and fixed on the forked bottom plate 305, and the large rectangular ruler 304 is flush with the top of the forked bottom plate 305. The small rectangular ruler 301 is an extension of the large rectangular ruler 304, with the lower tolerance limit line 303 as the boundary, and a rectangular ruler step is formed between the small rectangular ruler 301 and the large rectangular ruler 304 due to the height difference. The forked bottom plate 305 is designed as a fork structure. The upper tolerance limit line 302 is located at the front end of the lower tolerance limit line 303, and the two are parallel. It is required that the two are highly parallel to the forked bottom plate 305 to ensure measurement accuracy.

[0037] The conical sleeve 600 is fixedly connected to the center platform 500 and is coaxial and of the same diameter as the through hole of the center platform 500. The telescopic actuator cylinder 200 is a hollow cylindrical structure with internal threads, which is threadedly matched with the front end of the telescopic actuator rod 700. The rear end of the telescopic actuator rod 700 is connected to the handle 800, and the middle boss of the telescopic actuator rod 700 extends into the groove of the conical sleeve 600 to ensure that the telescopic actuator rod 700 can only rotate around its axis but cannot slide.

[0038] The telescopic actuator 200, the telescopic actuator rod 700, the through hole of the center platform 500, the tapered sleeve 600, and the handle 800 are strictly coaxial, and this axis is the main axis of the device. The upper tolerance limit line 302, the lower tolerance limit line 303, the clamping ring 400, and the fork-shaped bottom plate 305 are strictly perpendicular to the main axis of the device. The small rectangular ruler 301 and the large rectangular ruler 304 are strictly perpendicular to the fork-shaped bottom plate 305.

[0039] In one embodiment, the handle 800 is provided with anti-skid patterns on its surface to prevent slipping. When the handle 800 is turned counterclockwise, the telescopic actuator rod 700 is screwed into the telescopic actuator cylinder 200. Since the telescopic actuator rod 700 is limited by the conical sleeve 600, the telescopic actuator cylinder 200 moves backward, and the distance between the nose rectangular block 100 and the rectangular ruler step becomes smaller. When the handle 800 is turned clockwise, the telescopic actuator rod 700 is screwed out of the telescopic actuator cylinder 200. Since the telescopic actuator rod 700 is limited by the conical sleeve 600, the telescopic actuator cylinder 200 moves forward, and the distance between the nose rectangular block 100 and the rectangular ruler step becomes larger.

[0040] The snap ring 400 is arranged at the front end of one of the fork-shaped base plates 305 and is fixedly connected to the telescopic actuator 200. Its main function is to clamp the bottom boss of the strip shell when the distance between the bottom end of the strip shell and the rear flange of the clamping chain is less than the lower tolerance limit, that is, when the distance between the bottom end of the strip shell and the rear flange of the clamping chain is too small.

[0041] The nose rectangular block 100 is arranged on the opposite side of the front end clamping ring 400 of the telescopic actuator 200. Its main function is to use the nose rectangular block 100 to clamp the front flange of the card chain when the distance between the bottom end of the strip shell and the rear flange of the card chain is greater than the upper limit of the tolerance, that is, when the distance between the bottom end of the strip shell and the rear flange of the card chain is too large.

[0042] The steps of using the device of the present invention are as follows:

[0043] Step 1: When in use, use the side other than the snap ring 400 to detect the relative position of the chain shell, that is, measure the distance P between the bottom of the strip shell and the rear flange of the chain to see if it is greater than the lower tolerance limit and less than the upper tolerance limit. First, fit the fork-shaped bottom plate 305 completely to the bottom of the strip shell, keep the main axis of the device parallel to the axis of the strip shell, and observe whether the rear edge of the rear flange of the chain is between the upper tolerance limit line 302 and the lower tolerance limit line 303. If so, the relative position of the chain shell is qualified. If the rear edge of the rear flange of the chain is before the upper tolerance limit line 302, the relative position of the chain shell is too large and a shell pushing operation is required. Figure 3 As shown, execute step 3. If the rear flange of the chain interferes with the large rectangular ruler 304, or the fork-shaped bottom plate 305 cannot fit the bottom end of the strip shell when the rectangular ruler step abuts against the rear flange of the chain, the relative position of the chain shell is too small, and a shell pulling operation is required, such as Figure 4 As shown, execute step 2.

[0044] Step 2, the snap ring 400 is arranged at the front end of one of the fork-shaped bottom plates 305 and is fixedly connected to the telescopic actuator 200. Its main function is that when the distance P between the bottom end of the strip housing and the rear flange of the clamping chain is less than the lower limit of the tolerance, that is, the distance between the bottom end of the strip housing and the rear flange of the clamping chain is too small, the snap ring 400 clamps the bottom boss of the strip housing, and the rectangular ruler step of the side gauge 300 is used to press against the rear flange of the clamping chain. The handle 800 is turned counterclockwise, and the telescopic actuator 200 moves backward with the snap ring 400, and the strip housing is slightly pulled backward out of the clamping chain. When the bottom end of the strip housing is completely fitted with the side fork-shaped bottom plate 305, it means that the distance between the bottom end of the strip housing and the rear flange of the clamping chain is just at the lower limit of the tolerance. This step is the shell pulling operation.

[0045] Step 3, the nose rectangular block 100 is arranged on the opposite side of the front end snap ring 400 of the telescopic actuator 200. Its main function is to use the nose rectangular block 100 to clamp the front flange of the clamp chain when the distance between the bottom end of the strip housing and the rear flange of the clamp chain is greater than the upper limit of the tolerance, that is, when the distance between the bottom end of the strip housing and the rear flange of the clamp chain is too large, and use the fork-shaped bottom plate 305 of the gauge 300 on this side to stick to the bottom end of the strip housing, turn the handle 800 counterclockwise, and the telescopic actuator 200 moves backward with the nose rectangular block 100, and the fork-shaped bottom plate 305 pushes the strip housing forward, pushing the strip housing slightly backward into the clamp chain, and when the rectangular ruler step on this side completely abuts against the rear flange of the clamp chain, it means that the distance between the bottom end of the strip housing and the rear flange of the clamp chain just reaches the upper limit of the tolerance. This step is the shell pushing operation.

[0046] The key points of the present invention are as follows:

[0047] (1) The center platform 500 serves as the middle installation point of the entire device. The center platform 500 is a square boss with an outer contour of a side length L, an inner contour of a through tube with a diameter Q, and a thickness of 0.5L. Generally, L is selected to be 1 to 2 cm, and Q can be slightly smaller than L.

[0048] (2) The core measuring component of the device is the gauge 300. A rectangular scale step is formed between the small rectangular scale 301 and the large rectangular scale 304 due to the height difference. The fork-shaped bottom plate 305 is designed as a fork-shaped structure. The upper tolerance limit line 302 is located at the front end of the lower tolerance limit line 303, and the two are parallel. It is required that the two are highly parallel to the fork-shaped bottom plate 305 to ensure measurement accuracy.

[0049] (3) The telescopic actuator 200, the telescopic actuator rod 700, the through hole of the center platform 500, the tapered sleeve 600, and the handle 800 are strictly coaxial, and this axis is the main axis of the device. The upper tolerance limit line 302, the lower tolerance limit line 303, the retaining ring 400, and the fork-shaped bottom plate 305 are strictly perpendicular to the main axis of the device. The small rectangular ruler 301 and the large rectangular ruler 304 are strictly perpendicular to the fork-shaped bottom plate 305.

[0050] (4) The handle 800 has anti-skid patterns on its surface to prevent slipping.

[0051] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional technologies.

Claims

1. A device for precise detection and calibration of the relative position of a chain housing, characterized in that: include: A nose rectangular block (100), a telescopic actuator cylinder (200), a gauge (300), a clamping ring (400), a center table (500), a conical sleeve (600), a telescopic actuator rod (700), and a handle (800); The gauge (300) is fixed at the upper and lower ends of the center platform (500); The conical sleeve (600) is fixedly connected to the center platform (500) and is coaxial and has the same diameter as the through hole of the center platform (500); the telescopic actuator cylinder (200) is a hollow cylindrical structure and is matched and connected with the front end of the telescopic actuator rod (700); the rear end of the telescopic actuator rod (700) is connected to the handle (800), and the middle boss of the telescopic actuator rod (700) extends into the groove of the conical sleeve (600), and the telescopic actuator rod (700) can only rotate around its axis but cannot slide; The snap ring (400) is located on the gauge (300) at the lower end and is fixedly connected to the telescopic actuator (200); When the handle (800) is rotated counterclockwise, the telescopic actuating rod (700) is screwed into the telescopic actuating cylinder (200), the telescopic actuating rod (700) is limited by the conical sleeve (600), the telescopic actuating cylinder (200) moves backward, and the distance between the nose rectangular block (100) and the rectangular ruler step becomes smaller; when the handle (800) is rotated clockwise, the telescopic actuating rod (700) is screwed out of the telescopic actuating cylinder (200), the telescopic actuating rod (700) is limited by the conical sleeve (600), the telescopic actuating cylinder (200) moves forward, and the distance between the nose rectangular block (100) and the rectangular ruler step becomes larger; The nose rectangular block (100) is located on the opposite side of the frontmost clamping ring (400) of the telescopic actuator (200).

2. The device according to claim 1, characterized in that The gauge (300) is composed of a small rectangular ruler (301), an upper tolerance limit line (302), a lower tolerance limit line (303), a large rectangular ruler (304), and a fork-shaped bottom plate (305). The large rectangular ruler (304) is vertically mounted on the fork-shaped bottom plate (305), and the large rectangular ruler (304) is flush with the top of the fork-shaped bottom plate (305); the small rectangular ruler (301) is an extension of the large rectangular ruler (304), and is bounded by the lower tolerance limit line (303), and a rectangular ruler step is formed between the small rectangular ruler (301) and the large rectangular ruler (304) due to the height difference; the fork-shaped bottom plate (305) is designed as a fork-shaped structure; the upper tolerance limit line (302) is located at the front end of the lower tolerance limit line (303), and the two are parallel, and the two remain parallel to the fork-shaped bottom plate (305).

3. The device according to claim 2, characterized in that: The upper tolerance limit line (302), the lower tolerance limit line (303), the clamping ring (400), and the fork-shaped base plate (305) are perpendicular to the main axis of the device.

4. The device according to claim 1, characterized in that The center platform (500) is the middle installation point of the whole device. It is a square boss with an outer contour of side length L and an inner contour of a through pipe with a diameter Q. The thickness is 0.5L. L is 1 to 2 cm, and Q is smaller than L.

5. The device according to claim 1, characterized in that: The telescopic actuating cylinder (200), the telescopic actuating rod (700), the through hole of the center platform (500), the conical sleeve (600), and the handle (800) are coaxial, and this axis is the main axis of the device.

6. The device according to claim 1, characterized in that: The surface of the handle (800) is provided with anti-slip textures.

7. The device according to claim 1, characterized in that The clamping ring (400) is arranged at the front end of the fork-shaped bottom plate (305) at the lower end.

8. A method for precise detection and calibration of relative position of chain housing, characterized in that: For use in the device according to any one of claims 1 to 7, the method comprises the following steps: Step 1: When in use, the non-circlip (400) side is preferentially used to detect the relative position of the chain shell, and the distance between the bottom end of the strip shell and the rear flange of the clip chain is measured to determine whether it is greater than the lower tolerance limit and less than the upper tolerance limit: first, the fork-shaped bottom plate (305) is completely fitted with the bottom end of the strip shell, and the main axis of the device is kept parallel to the axis of the strip shell, and it is determined whether the rear edge of the rear flange of the clip chain is between the upper tolerance limit line (302) and the lower tolerance limit line (303). If so, the relative position of the chain shell is qualified. If the rear edge of the rear flange of the clip chain is before the upper tolerance limit line (302), the relative position of the chain shell is too large, and a shell pushing operation is required, and step 3 is performed; if the rear flange of the clip chain interferes with the large rectangular ruler (304), or the fork-shaped bottom plate (305) cannot fit the bottom end of the strip shell when the rectangular ruler step is against the rear flange of the clip chain, the relative position of the chain shell is too small, and a shell pulling operation is required, and step 2 is performed; Step 2: Use the rectangular step of the side gauge (300) to press against the rear flange of the card chain, turn the handle (800) counterclockwise, and the telescopic actuator (200) moves backward with the snap ring (400), and slightly pull the bar shell backward out of the card chain. When the bottom end of the bar shell is completely fitted with the side fork bottom plate (305), make sure that the distance between the bottom end of the bar shell and the rear flange of the card chain is just at the lower limit of the tolerance; Step 3, use the fork-shaped base plate (305) of the side gauge (300) to stick to the bottom end of the strip housing, turn the handle (800) counterclockwise, the telescopic actuator (200) moves the nose rectangular block (100) backward, the fork-shaped base plate (305) pushes the strip housing forward, and pushes the strip housing slightly backward into the chain. When the rectangular ruler step on this side completely contacts the rear flange of the chain, it is determined that the distance between the bottom end of the strip housing and the rear flange of the chain is just at the upper limit of the tolerance.

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