Novel device and method for measuring crescent depth

Abstract

This invention relates to the field of depth measurement technology and discloses a novel crescent groove depth measuring device and method. The device comprises a parallel vertical mechanism and an automatic centering measuring mechanism. The parallel vertical mechanism includes a parallel vertical seat with two parallel and aligned sides at its bottom, fully fitting the cylindrical surface of the roller ring. A hollow slider is slidably installed inside the seat. The automatic centering measuring mechanism includes a dial indicator, which is fixedly mounted on the top of the hollow slider. A hollow centering head is detachably mounted at the bottom of the hollow slider via a precision connection. The bottom surface of the hollow centering head is arc-shaped and simultaneously fits against both sides of the roller ring groove during measurement. This device eliminates the need to move the measuring device to find the lowest point of the crescent groove. By using the hollow centering head to align the center of the groove, the dial indicator probe is perpendicular to the roller ring axis and points vertically to the lowest point of the crescent groove, accurately measuring the crescent groove depth.

Description

Technical Field

[0001] This invention relates to the field of depth measurement technology, specifically to a novel device and method for measuring the depth of the crescent-shaped groove. Background Technology

[0002] To improve the measurement accuracy of the crescent groove depth of the finished product rolls and roll rings, a specialized device for measuring the crescent groove depth is needed. A search revealed one invention patent and three utility model patents related to this; from a mechanical structure perspective, they all involve simply mounting a dial indicator on a V-shaped base to measure the crescent groove depth. Figure 1 As shown: (A) Application publication number CN 10344781 A; (B) Application publication number CN102749016; (C) Application publication number 212432700 U; (D) Application publication number CN221425577 U.

[0003] This introduces two concepts, such as Figure 2 As shown:

[0004] 1. Left of the figure, slot depth: The vertical distance between the lowest point of the bottom of the slot of the roll ring and the original ungrooved reference surface of the roll or roll ring (the original cylindrical surface before the hole is machined), which needs to be measured perpendicular to the axis of the roll ring.

[0005] 2. Right side of the figure, crescent groove depth: the vertical distance between the lowest point of the bottom of the roller ring groove and the lowest point of the bottom of the crescent groove, which needs to be measured perpendicular to the axis of the roller ring.

[0006] In the actual measurement process, the aforementioned existing technologies require that the measuring device be gently moved horizontally to find the lowest point of the slot or crescent groove while ensuring that the measuring device is horizontal to the roller ring axis in order to accurately measure the depth of the slot or crescent groove. This is because without moving the device, it is impossible to determine whether the dial indicator probe is pointing to the lowest point of the slot or crescent groove.

[0007] Among them, the invention patent with publication number CN 10344781 A. The patent describes the specific implementation

[0014] as follows: When measuring with this device, first place it on the outer arc surface, so that the high-strength wear-resistant measuring head contacts the lowest point of the arc groove under a certain pressure, rotate the dial of the dial indicator so that both the large and small pointers of the dial indicator point to the "0" mark; then move the device so that the high-strength wear-resistant measuring head contacts the bottom of the crescent groove, move it gently, and observe the rotation of the dial indicator pointers at the same time. When the large pointer of the dial indicator rotates to its maximum amplitude, the number of millimeters rotated by the small pointer plus the number of graduations rotated by the large pointer multiplied by 0.01mm is the value of the crescent groove depth.

[0008] However, the following problems exist in the actual measurement process:

[0009] 1. When measuring the depth of the slot, gently moving the measuring device will likely disrupt the parallelism between the measuring device and the roller ring axis. If the parallelism between the measuring device and the roller ring axis is disrupted during movement, it will cause a measurement error of at least 0.05 to 0.2 mm. The operator needs to take repeated measurements to ensure measurement accuracy.

[0010] 2. When measuring the depth of the crescent-shaped sulcus, because the crescent-shaped sulcus is arranged at an angle of 30 to 60 degrees in the middle of the slot (e.g., Figure 2 As shown), the width of the bottom of the crescent groove is generally between 0.4 and 2 mm depending on the specifications of the groove. When moving the measuring device to find the lowest point of the crescent groove, it is necessary to ensure that the measuring device is parallel to the axis of the roller ring and slide along the bottom of the crescent groove which is very narrow and angled. This is extremely difficult. The dial indicator probe will most likely hit the sides of the crescent groove. If it does, it will cause a measurement error of at least 0.1 to 0.25 mm.

[0011] 3. When measuring the depth of the crescent sulcus, which has a bottom width of only 0.4 to 1.5 mm, the bottom width is too small, and the measuring device and the side wall of the crescent sulcus will block the view. The bottom of the crescent sulcus cannot be seen at all during the measurement process, which makes it impossible to move the measuring device to find the lowest point of the crescent sulcus.

[0012] 4. The diameter of the probe tip of the dial indicator used to measure the depth of the lunula is only 0.2 mm. When moving the measuring device to find the lowest point of the lunula, the probe is easily bent due to the interaction between the probe and the bottom of the lunula. If the dial indicator probe bends during the measurement process, it will cause a measurement error of at least 0.05 to 0.2 mm.

[0013] 5. When moving the measuring device to find the lowest point of the slot or crescent groove, the bottom of the measuring device will rub against the roller ring, causing wear on the bottom of the measuring device and affecting the measurement accuracy.

[0014] In summary, current lunula depth measuring devices cannot meet our requirements for accuracy. Therefore, we need to develop a new type of measuring device and method that allows the dial indicator probe to find the lowest point of the lunula without moving, and can accurately and conveniently measure the lunula depth. Summary of the Invention

[0015] To address the shortcomings of existing technologies, this invention provides a novel device and method for measuring the lunula depth, which has the advantage of accurately measuring the lunula depth without having to move the measuring device to find the lowest point of the lunula, thus solving the aforementioned technical problems.

[0016] To achieve the above objectives, the present invention provides the following technical solution: a novel crescent depth measuring device, comprising a parallel vertical mechanism and an automatic centering measuring mechanism, wherein the parallel vertical mechanism keeps the device parallel to the axis of the roller ring after simultaneously and completely contacting the roller body of the roller ring to be measured, and the automatic centering measuring mechanism slides vertically up and down within the parallel vertical mechanism for measuring the crescent depth.

[0017] The parallel vertical mechanism includes a parallel vertical seat, the two bottom edges of which are parallel and aligned with each other and completely fit the cylindrical surface of the roller ring, and a hollow slider is slidably installed inside.

[0018] The automatic centering measuring mechanism includes a dial indicator, which is fixedly installed on the top of the hollow slider. The bottom of the hollow slider is detachably installed with a hollow centering head through precision docking. The hollow centering head is used to replace the corresponding hollow centering head for measuring slots of different sizes. The bottom surface of the hollow centering head is arc-shaped and is completely in contact with both sides of the roller ring slot during measurement.

[0019] As a preferred embodiment of the present invention, the hollow slider has two symmetrical ears on its outer wall at the middle, and the parallel vertical seat has a through mounting hole from top to bottom, which is precisely fitted with the hollow slider.

[0020] As a preferred embodiment of the present invention, the mounting holes of the parallel vertical seat are provided with threads on both sides, and the internal threads are connected to plug screws for blocking the hollow slider. The bottom end of the plug screw is fixedly connected to a spring for providing vertical downward pressure to the hollow slider.

[0021] As a preferred embodiment of the present invention, the spring is located between the plug screw and the ears on both sides of the hollow slider.

[0022] As a preferred embodiment of the present invention, the parallel vertical seat is threadedly connected to a locking screw on its front side. The locking screw is perpendicular to the hollow slider and is used to lock the hollow slider at its center position.

[0023] As a preferred embodiment of the present invention, the hollow centering head has a through hole at the vertical center line position to accommodate the probe of the dial indicator passing through the through hole.

[0024] As a preferred embodiment of the present invention, a hole is provided through the vertical centerline of the hollow slider. The upper end is a round hole for mounting a dial indicator and is fixed with a stud, while the lower end is a square hole for connecting a hollow centering head.

[0025] A novel method for measuring lunula depth includes the following steps:

[0026] S1. Place the parallel vertical seat onto the roller body of the already processed roller ring. When the two bottom edges are in complete contact with the roller body at the same time, the parallel vertical seat and the axis of the roller ring remain parallel, and the vertical center line of the parallel vertical seat remains perpendicular to the axis of the roller ring.

[0027] S2. Connect and install the hollow centering head and dial indicator through the hollow slider so that they can slide vertically up and down in the parallel vertical seat. At this time, the vertical center line of the hollow centering head, dial indicator and hollow slider coincides with the vertical center line of the parallel vertical seat.

[0028] S3. At the position on the roller ring without the crescent groove, align the dial indicator's probe with the center of the bottom of the groove. Adjust it by hand so that the two sides of the bottom of the parallel vertical seat are in full contact with the roller body at the same time. Under the combined action of the gravity of the measuring device and the spring thrust, the hollow centering head will be pressed vertically into the groove. When the two sides of the hollow centering head are in contact with the two sides of the groove at the same time, the device completes automatic centering. The dial indicator's probe will then point vertically to the lowest point of the groove and be perpendicular to the axis of the roller ring. Then lock the hollow slider, lift the dial indicator head and then gently lower it to determine the measurement reference point. Set the large dial of the dial indicator to zero and remember the reading of the small dial of the dial indicator.

[0029] S4. Pick up the device and place the dial indicator probe into the center of the crescent groove. Adjust it so that the two bottom edges of the parallel vertical seat are in full contact with the roller body at the same time. Keep the device and the roller ring axis horizontal. At this time, the hollow centering head can contact the two sides of the roller ring groove at the same time. The device completes automatic centering. The dial indicator probe automatically points vertically to the bottom of the crescent groove and is perpendicular to the roller ring axis. Then lift the dial indicator head and gently put it down. Read the values ​​on the large dial and small dial of the dial indicator. Subtract the value on the small dial when determining the measurement reference point from the value on the small dial at this time, and add the value on the large dial at this time to obtain the accurate depth of the crescent groove.

[0030] Compared with the prior art, the present invention provides a novel device and method for measuring the depth of the lunula, which has the following beneficial effects:

[0031] When measuring the depth of the slot, the hollow centering head is used to align the center of the slot. Without moving the measuring device, the dial indicator probe can be perpendicular to the roller ring axis and point vertically to the lowest point of the crescent groove, thus accurately measuring the depth of the crescent groove.

[0032] 1. It avoids the measurement error of 0.05 to 0.2 mm caused by slightly moving the measuring device and disrupting the parallelism between the measuring device and the roller ring axis. It can ensure measurement accuracy without the need for the operator to take multiple measurements, thus increasing the measurement efficiency by 3 times.

[0033] 2. This avoids the problem of measurement error of 0.1 to 0.25 mm when measuring the depth of the crescent groove, because when moving the measuring device to find the lowest point of the crescent groove, it is necessary to ensure that the measuring device is parallel to the roller ring axis and slide along the bottom of the crescent groove which has a very small width and an angle. This causes the dial indicator probe to touch the sides of the crescent groove.

[0034] 3. This avoids the problem that when measuring the depth of the crescent-shaped groove with a bottom width of only 0.4 to 1.5 mm, the bottom width is too small, and the measuring device and the side wall of the crescent-shaped groove will block the view, making it impossible to see the bottom of the crescent-shaped groove during the measurement process, which makes it impossible to move the measuring device to find the lowest point of the crescent-shaped groove.

[0035] 4. It avoids the problem of measurement error of 0.05 to 0.2 mm caused by the interaction between the probe and the bottom of the crescent when the moving measuring device finds the lowest point of the crescent.

[0036] 5. This avoids the problem of friction between the bottom of the measuring device and the roller ring when the moving measuring device is searching for the lowest point of the slot or crescent groove, which would cause wear on the bottom of the measuring device and affect the measurement accuracy.

[0037] 6. Improved the accuracy and stability of crescent groove depth measurement, further enhancing the machining accuracy of crescent grooves in rolls and roll rings, enabling more precise control of rolling accuracy. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of existing technology;

[0039] Figure 2 This is a schematic diagram of the appearance of a roller ring in the prior art;

[0040] Figure 3 This is a schematic diagram showing the overall assembly effect of the device of the present invention;

[0041] Figure 4 This is an exploded view of the structural components of the present invention;

[0042] Figure 5 This is a schematic diagram of the parallel vertical seat structure of the present invention from various perspectives;

[0043] Figure 6 This is a schematic diagram of the hollow slider structure of the present invention from various perspectives;

[0044] Figure 7 This is a schematic diagram of the hollow centering head structure of the present invention and its various perspectives;

[0045] Figure 8 This is a three-dimensional schematic diagram of the parallel vertical mechanism and the automatic centering measurement mechanism of the present invention;

[0046] Figure 9This is a schematic diagram illustrating the working principle of the device of the present invention;

[0047] Figure 10 This is a schematic diagram of the device of the present invention measuring slots of different sizes.

[0048] In the diagram: 1. Dial indicator; 2. Plug screw; 3. Spring; 4. Parallel vertical seat; 5. Locking screw; 6. Hollow slider; 7. Hollow centering head. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please see Figures 1-9 The novel crescent depth measuring device consists of a parallel vertical mechanism and an automatic centering measuring mechanism. The parallel vertical mechanism keeps the device parallel to the central axis of the roller ring after it makes full contact with the roller body of the roller ring to be measured. The automatic centering measuring mechanism slides vertically up and down within the parallel vertical mechanism to measure the crescent depth.

[0051] like Figure 4 , Figure 8 As shown, the parallel vertical mechanism can utilize the two parallel edges of the bottom of the parallel vertical seat 4, which are in the same horizontal plane and are parallel to each other, to keep the device parallel to the axis of the roller ring and the vertical center line perpendicular to the axis of the roller ring after they are in full contact with the roller body at the same time.

[0052] The automatic centering measuring mechanism consists of a hollow centering head 7 and a dial indicator 1 connected and installed as a whole via a hollow slider 6. The dial indicator 1 is fixed on the hollow slider, and the needle of the dial indicator 1 can pass through the hollow centering head 7. The automatic centering measuring mechanism can slide vertically up and down within the mounting hole of the hollow slider 6 of the parallel vertical mechanism, and the spring 3 provides a vertical downward thrust for the automatic centering measuring mechanism.

[0053] The parallel vertical mechanism includes a parallel vertical seat 4, such as... Figure 5 As shown, the two sides of the bottom of the parallel vertical seat 4 are aligned with each other to fully fit the cylindrical surface of the roller ring, so that the parallel vertical seat 4 and the axis of the roller ring are kept parallel; the parallel vertical seat 4 has a through hole for mounting the hollow slider 6, the spring 3 and the plug screw 2, so that the hollow slider 6 can slide vertically up and down in the hole.

[0054] The automatic centering measuring mechanism includes a dial indicator 1, with a probe mounted on its head, capable of measuring the depth of the crescent groove, which is only 0.3 mm wide at the bottom. The dial indicator is fixedly mounted on the top of the hollow slider 6, and a hollow centering head 7 is detachably mounted on the bottom of the hollow slider 6 via a precision joint. Figure 7 and Figure 4 As shown, a through hole is opened on the vertical center line, through which the probe of dial indicator 1 can pass and be installed on the hollow slide 6 to align the center of the groove hole. The top of the hollow centering head 7 is provided with a retaining edge to prevent it from retracting into the hollow slide 6. The bottom surface of the hollow centering head 7 is arc-shaped, and it fits against both sides of the roller ring groove hole simultaneously during measurement.

[0055] Furthermore, the mounting holes of the parallel vertical seat 4 are provided with threads on both sides, and the internal threads are connected to plug screws 2, which are used to block the hollow slider 6, ensuring that the hollow slider 6 slides within its stroke and will not slide out of the parallel vertical seat 4, and can finely adjust the stroke of the hollow slider 6. The bottom end of the plug screw 2 is fixedly connected to a spring 3, which is used to provide vertical downward pressure to the hollow slider 6, pushing the hollow centering head 7 vertically against the roller ring groove hole for centering. The spring 3 is located between the plug screw 2 and the ears on both sides of the hollow slider 6.

[0056] Furthermore, the parallel vertical seat 4 has a locking screw 5 threaded on its front side. The locking screw 5 is perpendicular to the hollow slider 6 and is used to lock the hollow slider 6 in the center position, which facilitates the measurement process and improves measurement stability.

[0057] The working principle and steps of this device are as follows:

[0058] 1. For example Figure 5 , Figure 9 The two bottom edges of the parallel vertical seat 4 are in the same horizontal plane and are parallel to each other. They are placed on the roller body of the already processed roller ring. When the two bottom edges are in complete contact with the roller body at the same time, the parallel vertical seat 4 remains parallel to the roller ring axis, and the vertical center line of the parallel vertical seat 4 remains perpendicular to the roller ring axis.

[0059] 2. For example Figure 4 , Figure 8 The hollow centering head 7 and dial indicator 1 are connected and installed through the hollow slider 6, so that they can slide vertically up and down in the parallel vertical seat 4. The vertical center lines of the hollow centering head 7, dial indicator 1, hollow slider 6, and parallel vertical seat 4 coincide with each other.

[0060] 3. For example Figure 4 , Figure 9In the position where there is no crescent groove on the roller ring groove, align the probe of dial indicator 1 with the center of the bottom of the groove. Then place the device on the roller body of the roller ring and manually adjust it so that the two bottom edges of the parallel vertical seat 4 are in full contact with the roller body simultaneously, keeping the device horizontal with the axis of the roller ring. At this time, under the combined action of the gravity of the measuring device and the thrust of the spring 3, the hollow centering head 7 will be pressed vertically into the roller ring groove. When both sides of the hollow centering head 7 are in contact with both sides of the groove simultaneously, the device completes automatic centering. The probe of dial indicator 1 will then point vertically to the lowest point of the groove and be perpendicular to the axis of the roller ring. Then lock the hollow slider 6, lift the dial indicator 1 and gently lower it to determine the measurement reference point. Then set the large dial of dial indicator 1 to zero and remember the reading of the small dial of dial indicator 1. Figure 9 As shown, pick up the device again, place the dial indicator 1 probe into the crescent groove, and adjust it so that the two bottom edges of the parallel vertical seat 4 are in complete contact with the roller body at the same time. Keep the device horizontal with the roller ring axis. At this time, the hollow centering head 7 can contact the two sides of the roller ring groove at the same time. The device completes automatic centering. The dial indicator 1 probe automatically points vertically to the bottom of the crescent groove and is perpendicular to the roller ring axis. Then lift the dial indicator 1 head and gently put it down. Read the large dial value and the small dial value of dial indicator 1. Subtract the small dial value when determining the measurement reference point from the small dial value now measured, and add the large dial value now measured to obtain the accurate depth of the crescent groove.

[0061] 4. For example Figure 10 As shown, hollow centering heads 7 of different sizes can be selected according to the size of the slot to better adapt to the measurement of the crescent groove depth of slots of different sizes, and further improve the measurement accuracy.

[0062] This device eliminates the need to move the measuring device to find the lowest point of the crescent groove. It uses the hollow centering head 7 to align the center of the groove hole, so that the probe of the dial indicator 1 is perpendicular to the roller ring axis and points vertically to the lowest point of the crescent groove, accurately measuring the depth of the crescent groove. This eliminates the need for repeated measurements and also eliminates all measurement errors caused by moving the measuring device to find the lowest point of the crescent groove.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of gullet depth measuring device, characterized in that: Composed of a parallel vertical mechanism and an automatic centering measuring mechanism, the parallel vertical mechanism makes full contact with the cylindrical surface of the roller ring to be measured, so that the device is parallel to the axis of the roller ring. The automatic centering measuring mechanism slides vertically up and down within the parallel vertical mechanism to measure the depth of the crescent groove. The parallel vertical mechanism includes a parallel vertical seat (4), the two bottom sides of which are parallel and aligned with each other and completely fit the cylindrical surface of the roller body, and a hollow slider (6) is slidably installed inside. The automatic centering measuring mechanism includes a dial indicator (1), which is fixedly installed on the top of the hollow slider (6). The bottom of the hollow slider (6) is detachably installed with a hollow centering head (7) through precision docking. The hollow centering head (7) is used to replace the corresponding hollow centering head (7) when measuring slots of different sizes. The bottom surface of the hollow centering head (7) is arc-shaped and fits against both sides of the roller ring slot during measurement. Two symmetrical ears are fixedly installed on the outer wall of the middle part of the hollow slider (6), and the parallel vertical seat (4) has a through hole from top to bottom, which is precisely matched with the hollow slider (6). The mounting holes of the parallel vertical seat (4) are provided with threads on both sides, and the internal threads are connected to plug screws (2) for blocking the hollow slider (6). The bottom end of the plug screws (2) is fixedly connected to a spring (3) for providing vertical downward pressure to the hollow slider (6). The spring (3) is located between the plug screw (2) and the ears on both sides of the hollow slider (6); The hollow centering head (7) has a through hole at the vertical center line position, which is used to accommodate the probe of the dial indicator (1) to pass through the through hole; The hollow slider (6) has a hole on its vertical center line. The upper end is a round hole for installing a dial indicator (1) and fixing it with a stud. The lower end is a square hole for connecting the hollow centering head (7).

2. The novel crescent slot depth measuring device according to claim 1, characterized in that: The parallel vertical seat (4) has a locking screw (5) threaded on the front. The locking screw (5) is perpendicular to the hollow slider (6) and is used to lock the hollow slider (6) in the center position.

3. The measuring method of the new-type crescent groove depth measuring device according to claim 1, characterized in that: Includes the following steps: S1. Place the parallel vertical seat (4) on the roller body of the already processed roller ring. When the two bottom edges are in complete contact with the roller body at the same time, the parallel vertical seat (4) and the axis of the roller ring remain parallel, and the vertical center line of the parallel vertical seat (4) remains perpendicular to the axis of the roller ring. S2. Connect and install the hollow centering head (7) and dial indicator (1) through the hollow slider (6) so that they can slide vertically up and down in the parallel vertical seat (4). At this time, the vertical center line of the hollow centering head (7), dial indicator (1) and hollow slider (6) coincides with the vertical center line of the parallel vertical seat (4). S3. At the position where there is no crescent groove on the roller ring, align the probe of the dial indicator (1) with the center of the bottom of the groove hole, and adjust it by hand so that the two sides of the bottom of the parallel vertical seat (4) are in complete contact with the roller body at the same time. Under the combined action of the gravity of the measuring device and the thrust of the spring (3), the hollow centering head (7) will be pressed vertically into the groove hole of the roller ring. When the two sides of the hollow centering head (7) are in contact with the two sides of the groove hole at the same time, the device completes automatic centering. The probe of the dial indicator (1) will point vertically to the lowest point of the groove hole and be perpendicular to the axis of the roller ring. Then lock the hollow slider (6), lift the dial indicator (1) head and gently put it down to determine the measurement reference point. Set the large dial of the dial indicator (1) to zero and remember the reading of the small dial of the dial indicator (1). S4. Pick up the device, roughly align the probe of the dial indicator (1) with the center of the bottom of the crescent groove, and place it into the crescent groove. Adjust it so that the two bottom edges of the parallel vertical seat (4) are in complete contact with the roller body at the same time, and keep the device and the central axis of the roller ring horizontal. At this time, the hollow centering head (7) can contact the two sides of the groove hole of the roller ring at the same time, and the device completes automatic centering. The probe of the dial indicator (1) automatically points vertically to the bottom of the crescent groove and is perpendicular to the axis of the roller ring. At this time, lift the dial indicator (1) head and then gently put it down. Read the value of the large dial and the value of the small dial of the dial indicator (1). Subtract the value of the small dial when determining the measurement reference point from the value of the small dial measured at this time, and add the value of the large dial measured at this time to obtain the accurate depth of the crescent groove.

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