Inner diameter gauge for circular inner hole of blank

Abstract

The utility model relates to the technical field of measuring instruments, and in particular to a gauge for the inner diameter of a circular inner hole of a blank. The gauge for the inner diameter of a circular inner hole of a blank provided by the utility model obtains four readings by measuring with a sliding mark, and the inner diameter of the blank can be quickly and accurately calculated by a formula. By replacing the vertical line component with a rigid structure, the inner diameter of any blank tube can be measured, which improves the versatility of the gauge, reduces the measurement cost and labor intensity, solves the problems of high cost, great detection difficulty and long time consumption of the inner diameter gauge in the prior art, and achieves the purpose of fast, low-cost, low-difficulty and high-precision inner diameter.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to an inner diameter measuring tool for a circular inner hole of a blank. Background Art

[0002] After hot working, the inner surface of the blank with a cylindrical inner hole is often accompanied by a lot of oxide scale, lubricant, pits and protrusions caused by material flow, and non-circular hole caused by deformation, making it difficult to accurately measure the inner diameter of the blank.

[0003] There are generally three existing methods for measuring the inner diameter of blanks: ① Measurement with a tape measure or steel ruler. This method has poor measurement accuracy and can only measure the inner diameter of the port position; ② Internal diameter micrometer. Because the surface of the blank is relatively rough, it is difficult for the gauge to slide freely to find a position perpendicular to the inner diameter axis, it is difficult to accurately find the diameter size, and it is difficult to measure the ovality; ③ Measurement with a gauge on a lathe or inspection platform. This method can accurately measure the inner diameter and ovality, but the detection process requires special equipment, the installation is time-consuming, and the detection cost is high. The above three methods each have their own disadvantages. Utility Model Content

[0004] The utility model provides a rough circular inner hole inner diameter gauge, which is used to solve the problems of high cost, great detection difficulty and long time consumption of existing inner diameter gauges, and achieves the purpose of fast, low cost, low detection difficulty and high accuracy inner diameter.

[0005] The utility model provides a roughcast circular inner hole inner diameter gauge, comprising:

[0006] Mounting rod;

[0007] A cross plate, comprising a mounting plate and a mounting arm, wherein a mounting hole is provided in the middle of the mounting plate, the mounting plate is interference-fitted on the mounting rod through the mounting hole, and a circumferential array of four adjacent mounting arms perpendicular to each other is provided on the side wall of the mounting plate, and an opening groove is provided on the side wall of the mounting arm;

[0008] Sliders, four in total, the four sliders are coaxially arranged inside the mounting arm, a handle is arranged at one end of the slide near the mounting arm, the handle cooperates with the open slot, and the slide can slide freely inside the mounting arm;

[0009] The vertical line assembly is sleeved on the mounting rod.

[0010] According to the inner diameter gauge of the circular inner hole of a blank provided by the utility model, the opening direction of the opening groove is the same as the axial position of the installation arm.

[0011] According to the blank circular inner hole inner diameter gauge provided by the utility model, the sliding mark includes a tip pointer and a long rod;

[0012] The long rod is sleeved inside the mounting arm, one end of the long rod away from the cross plate is fixedly connected to the tip pointer, and the handle is arranged on the outer peripheral side of the long rod close to the cross plate.

[0013] According to the inner diameter gauge of the circular inner hole of a blank provided by the utility model, scale lines are arranged on the surface of the long rod, and the scale line readings represent the distance between the tip pointer and the axis of the mounting hole.

[0014] According to the blank circular inner hole inner diameter gauge provided by the utility model, the vertical line assembly includes a first vertical line, a first weight, a second vertical line and a second weight;

[0015] The first weight and the second weight are respectively fixed to the first vertical line and the second vertical line at one end away from the mounting rod, the first vertical line and the second vertical line are symmetrically arranged at both ends of the cross plate, and the distance from the top of the first weight to the axis of the mounting rod is equal to the distance from the top of the second weight to the axis of the mounting rod.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a circular inner diameter gauge for a blank, which obtains four readings by measuring with a sliding mark, and can quickly and accurately calculate the inner diameter of the blank through a formula. By replacing the vertical line component with a rigid structure, the inner diameter of any blank tube placed can be measured, thereby improving the versatility of the gauge, reducing the measurement cost and labor intensity, and solving the problems of high cost, great detection difficulty and long time consumption of inner diameter gauges in the prior art, thereby achieving the purpose of fast, low-cost, low-difficulty and high-precision inner diameter detection.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a working diagram of the inner diameter gauge of the circular inner hole of the blank;

[0021] Figure 2 This is the front view of the inner diameter gauge of the circular inner hole of the blank;

[0022] Figure 3This is the left view of the inner diameter gauge of the circular inner hole of the blank;

[0023] Figure 4 It is a schematic diagram of the specific structure of the cross plate;

[0024] Figure 5 It is a schematic diagram of the specific structure of the mounting arm;

[0025] Figure 6 It is a schematic diagram of the specific structure of the slider;

[0026] Figure 7 It is a schematic diagram of measuring the inner diameter of the circular inner hole of the blank.

[0027] Reference numerals:

[0028] 1. Install the rod;

[0029] 2. Cross plate; 201. Mounting plate; 202. Mounting arm; 203. Mounting hole; 204. Opening slot;

[0030] 3. Slider; 301. Handle; 302. Long rod; 303. Tip pointer;

[0031] 4. Vertical line assembly; 401. First vertical line; 402. First weight; 403. Second vertical line; 404. Second weight;

[0032] 5. The circular inner hole of the blank to be measured. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms are not directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] Combine the following Figure 1-Figure 7 The embodiment shown describes the technical solution of the utility model:

[0039] The utility model provides a roughcast circular inner hole inner diameter gauge, comprising: a mounting rod 1; a cross plate 2, comprising a mounting plate 201 and a mounting arm 202, a mounting hole 203 is provided in the middle of the mounting plate 201, the mounting plate 201 is interference-fitted on the mounting rod 1 through the mounting hole 203, a circular array of four adjacent mounting arms 202 perpendicular to each other is provided on the side wall of the mounting plate 201, an opening groove 204 is provided on the side wall of the mounting arm 202; four sliders 3, the four sliders 3 are coaxially arranged inside the mounting arm 202, a handle 301 is provided at one end of the slider 3 close to the mounting arm 202, the handle 301 cooperates with the opening groove 204, and the slider 3 can slide freely in the mounting arm 202; a vertical line component 4 is sleeved on the mounting rod 1.

[0040] It is understandable that the shape of the mounting rod 1 can be selected at will, and it can be a polyhedron or a cylinder. In this embodiment, the mounting rod 1 is selected as a cylinder, which is convenient for the staff to hold and take. The shape of the mounting hole 203 opened in the middle position of the mounting plate 201 matches the mounting rod 1. The mounting plate 201 can be selected as a cylinder or a polyhedron. Because the side wall of the mounting plate 201 needs to be provided with four mounting arms 202 in a circular array, and the four mounting arms 202 are adjacent to each other and perpendicular, the size of the mounting plate 201 should not be too large. If the size of the mounting plate 201 is too large, the versatility of the circular inner hole inner diameter gauge of the blank will be reduced. It is difficult to put the mounting plate 201 and the mounting arm 202 into the blank at the smaller inner diameter of the blank.

[0041] The mounting arm 202 is selected as a hollow tube, and the specific shape of the mounting arm 202 can be determined according to actual needs. The slider 3 is coaxially arranged inside the mounting arm 202, and four corresponding sliders are arranged. The size of the slider 3 is slightly smaller than the inner diameter of the mounting arm 202, which is convenient for the slider 3 to slide inside the mounting arm 202. When the installed blank circular inner hole inner diameter gauge is working, the mounting rod 1 and the mounting plate 201 extend into the circular inner hole of the blank, and the inner diameter of the circular inner control is determined by sliding the slider 3. A handle is arranged on the side of the slider 3 close to the mounting plate 201. 301, the handle 301 is matched with the opening slot 204, so that the staff can achieve the purpose of sliding the slider 3 by waving the handle 301 when measuring, so as to accurately measure the diameter of the circular inner hole; the shape of the handle 301 is based on the actual selection, but the position where the handle 301 contacts the opening slot 204 needs to be matched with the opening slot 204, and the size of the handle 301 passing through the opening slot 204 is set moderately, while satisfying the staff's ability to toggle the handle 301, preventing the handle 301 from being too large and affecting the measurement process;

[0042] The vertical line assembly 4 is sleeved on the mounting rod 1. Since the vertical line always maintains a vertical direction when not affected by external forces, the provision of the vertical line assembly 4 can improve the measurement accuracy.

[0043] In this embodiment, the mounting rod 1 is a cylinder, and the mounting plate 201 is a cylinder with a diameter larger than the mounting rod 1, but the height of the mounting rod 1 is much larger than the height of the mounting plate 201. A mounting hole 203 is provided in the middle of the mounting plate 201, and the size of the mounting hole 203 matches the outer diameter of the mounting rod 1;

[0044] The mounting plate 201 is sleeved on the mounting rod 1 through the mounting hole 203. The force position of the mounting plate 201 is reasonably calculated according to the actual situation. After the position of the mounting plate 201 on the mounting rod 1 is determined, the mounting plate 201 and the mounting rod 1 are installed with interference fit. Four mounting arms 202 are arranged in a circular array on the side wall of the mounting plate 201. The four mounting arms 202 are adjacent and perpendicular to each other. The mounting arms 202 are hollow cylinders. An opening groove 204 is opened on the side wall of the mounting arm 202. The slider 3 is arranged inside the mounting arm 202. The handle 301 is fixedly arranged on the slider 3 and is aligned with the opening groove 204. 4, the handle 301 can slide in the installation arm 202 through the open slot 204. The shape of the handle 301 is a T-shaped handle 301. The length of the narrower part of the handle 301 matches the open slot 204. The T-shaped handle 301 can increase the contact area between the staff and the handle 301, and can prevent the handle 301 from being retracted into the installation arm 202, thereby preventing the slider 3 from being moved. The slider 3 is moved by moving the handle 301, and the inner diameter of the blank is measured by measuring the distance between the top ends of the sliders 3 on the same straight line.

[0045] The plumb line assembly 4 is sleeved on the mounting rod 1. The main function of the plumb line assembly 4 is to ensure that the mounting rod 1 is in a horizontal state, thereby improving the accuracy of the measurement.

[0046] According to the circular inner hole inner diameter gauge for blanks provided by the utility model, the opening direction of the opening slot 204 is in the same position as the axis of the mounting arm 202 .

[0047] The main function of the open groove 204 on the mounting arm 202 is to facilitate the movement of the handle 301, thereby driving the slider 3 to slide in the mounting arm 202. The opening direction of the open groove 204 is the same as the axial position of the mounting arm 202, which is convenient for the handle 301 to move smoothly in the open groove 204, thereby driving the slider 3 to slide inside the mounting arm 202 until the top of the slider 3 contacts the inner wall of the circular inner hole, and then it is moved out of the blank through the mounting rod 1. The distance between the tops of the two sliders 3 on the same straight line is the inner diameter of the circular inner hole of the blank.

[0048] According to the circular inner diameter gauge for blank parts provided by the utility model, the slider 3 includes a tip pointer 303 and a long rod 302; the long rod 302 is sleeved inside the mounting arm 202, and one end of the long rod 302 away from the cross plate 2 is fixedly connected to the tip pointer 303, and the handle 301 is arranged on the outer peripheral side of the long rod 302 close to the cross plate 2.

[0049] According to the circular inner hole inner diameter gauge for blanks provided by the utility model, scale lines are arranged on the surface of the long rod 302 , and the scale line readings represent the distance between the tip pointer 303 and the axis of the mounting hole 203 .

[0050] According to the circular inner hole inner diameter gauge of the blank provided by the utility model, the readings of the scale lines corresponding to the four slide marks 3 are A, B, C and D respectively, and the calculation formula of the inner diameter R of the circular inner hole of the blank is:

[0051]

[0052] In this embodiment, the slider 3 includes a long rod 302 and a simple tip pointer 303. The tip pointer 303 is fixedly connected to the end of the long rod 302 away from the cross plate 2. The mounting arm 202 is a hollow structure. In this embodiment, the mounting arm 202 is set as a hollow cylinder. The shape of the long rod 302 is adjusted according to the shape of the inside of the mounting arm 202. The size of the long rod 302 matches the size of the inner arm of the mounting arm 202. The long rod 302 is set inside the mounting arm 202;

[0053] Because the handle 301 is arranged on the long rod 302, and the position of the handle 301 matches the open slot 204 provided on the mounting arm 202, the long rod 302 cannot be flexibly rotated in the mounting arm 202, so scale lines are arranged on the surface of the long rod 302. After the long rod 302 extends out of the mounting arm 202, the inner diameter length of the circular inner hole in the blank can be determined directly by reading the readings on the scale lines, and no subsequent measurement is required, which reduces the measurement tasks of the staff, reduces the error rate, and improves the work efficiency of the staff;

[0054] Moreover, reading the data directly from the scale line can also avoid the error caused by the uneven inner wall surface when the mounting rod 1 is moved out of the circular inner hole, thereby improving the accuracy of the measurement of the inspection fixture;

[0055] The sliders 3 respectively arranged in the four mounting arms 202 can obtain four readings through the scale lines on the long rod 302, which are respectively recorded as A, B, C and D. The calculation formula for the inner diameter R of the circular inner hole 5 of the blank to be measured is:

[0056]

[0057] According to the circular inner diameter gauge for blank parts provided by the utility model, the vertical line assembly 4 includes a first vertical line 401, a first weight 402, a second vertical line 403 and a second weight 404; the first weight 402 and the second weight 404 are respectively fixed to the first vertical line 401 and the second vertical line 403 at one end away from the mounting rod 1, the first vertical line 401 and the second vertical line 403 are symmetrically arranged at both ends of the cross plate 2, and the distance from the top of the first weight 402 to the axis of the mounting rod 1 is equal to the distance from the top of the second weight 404 to the axis of the mounting rod 1.

[0058] When the vertical line assembly 4 is a rigid structure, the blank circular inner hole inner diameter gauge can measure the inner diameter of any blank tube placed.

[0059] In this embodiment, the vertical line assembly 4 includes a first vertical line 401, a first weight 402, a second vertical line 403 and a second weight 404, wherein the first weight 402 and the second weight 404 are pendants with a certain weight, and the function of the weights is mainly to ensure that the first vertical line 401 and the second vertical line 403 can maintain the vertical direction unchanged, thereby ensuring that the installation rod 1 is in a horizontal state during measurement, thereby improving the measurement accuracy.

[0060] The first weight 402 and the second weight 404 are mainly used to provide gravity to straighten the first vertical line 401 and the second vertical line 403 to ensure that the first vertical line 401 and the second vertical line 403 always remain in a vertical state. When the center axis of the circular inner hole 5 of the blank to be measured is in a horizontal state, the distance from the top of the first weight 402 to the axis of the mounting rod 1 is equal to the distance from the top of the second weight 404 to the axis of the mounting rod 1. By observing the states of the first vertical line 401 and the second vertical line 403, it is determined whether the mounting rod 1 is in a horizontal state to ensure the measurement accuracy. When the center axis of the circular through hole of the blank to be measured is not in a horizontal state, the vertical line can be set to a rigid structure, and the vertical line and the mounting rod 1 always remain in a vertical state, thereby ensuring the measurement accuracy.

[0061] The working principle of the utility model is as follows: the mounting rod 1 with one end of the mounting plate 201 is inserted into the circular inner hole 5 of the blank to be measured. When the vertical line is in the vertical direction, the angle adjustment of the mounting rod 1 is stopped, and then the handle 301 on the long rod 302 is slid until the tip pointer 303 contacts the inner wall of the circular inner hole. After the tip pointers 303 of the four sliders 3 all contact the inner wall, the readings of the scale lines on the long rod 302 are read to obtain the corresponding data, and then the inspection fixture is moved out of the circular inner hole 5 of the blank to be measured as a whole, and the inner diameter of the circular inner hole 5 of the blank to be measured is obtained according to the calculation formula of the inner diameter R of the circular inner hole of the blank.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A circular inner hole inner diameter gauge for a blank, characterized in that: include: Mounting rod (1); A cross plate (2) comprises a mounting plate (201) and a mounting arm (202); a mounting hole (203) is provided in the middle of the mounting plate (201); the mounting plate (201) is interference fit on the mounting rod (1) through the mounting hole (203); a circular array of four adjacent mounting arms (202) perpendicular to each other is formed on the side wall of the mounting plate (201); and an opening groove (204) is provided on the side wall of the mounting arm (202); There are four sliders (3) in total. The four sliders (3) are coaxially arranged inside the mounting arm (202). A handle (301) is arranged at one end of the slider (3) close to the mounting arm (202). The handle (301) cooperates with the opening groove (204). The slider (3) can slide freely inside the mounting arm (202); A vertical line assembly (4) is sleeved on the mounting rod (1).

2. The inner diameter gauge for circular inner holes of blanks according to claim 1, characterized in that: The opening direction of the opening slot (204) is in the same position as the axis of the mounting arm (202).

3. The inner diameter gauge for circular inner holes of blanks according to claim 1, characterized in that: The slider (3) comprises a tip pointer (303) and a long rod (302); The long rod (302) is sleeved inside the mounting arm (202), one end of the long rod (302) away from the cross plate (2) is fixedly connected to the tip pointer (303), and the handle (301) is arranged on the outer peripheral side of the long rod (302) close to the cross plate (2).

4. The inner diameter gauge for circular inner holes of blanks according to claim 3, characterized in that: The surface of the long rod (302) is provided with scale lines, and the scale line readings represent the distance between the tip pointer (303) and the axis of the mounting hole (203).

5. The inner diameter gauge for circular inner holes of blanks according to claim 1, characterized in that: The vertical line assembly (4) comprises a first vertical line (401), a first weight (402), a second vertical line (403) and a second weight (404); The first weight (402) and the second weight (404) are respectively fixed to one end of the first vertical line (401) and the second vertical line (403) away from the installation rod (1); the first vertical line (401) and the second vertical line (403) are symmetrically arranged at the two ends of the cross plate (2); the distance from the top of the first weight (402) to the axis of the installation rod (1) is equal to the distance from the top of the second weight (404) to the axis of the installation rod (1).

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