Centering device for inner contour

Abstract

The utility model discloses a centering device for an inner contour, which is used for centering the inner contour of a part and comprises an adjusting screw, a frame body and centering rods, the adjusting screw is mounted at the center of the frame body through a thread structure, and at least two centering rods with the same length are symmetrically arranged and slidably mounted on the side surface of the frame body. The inner end of the adjusting screw abuts against the inner end of the centering rod. When the device is used, the device can be placed in the inner contour of a measured part, the adjusting screw is adjusted to enable the centering rod to automatically extend out of the peripheral side of the frame body and to be in contact with and abut against the inner contour of the part, and at the moment, the adjusting screw or the scales on the adjusting screw are the centering line of the contour. According to the device, the inner contour centering efficiency of the measured part is greatly improved, and the subsequent machining precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of centering devices, in particular to a centering device for inner contours. Background Art

[0002] When machining rough parts, each clamping needs to be centered, and for some parts with inner contours, the inner contours often need to be centered, leveled, and marked. Currently, most of the centering methods are that workers use general measuring tools such as steel rulers for auxiliary measurement, then read the size to find the center, and finally mark. However, due to the influence of the irregularity of the actual rough machining surface, relying only on simple rulers and visual readings leads to poor accuracy and low efficiency. Utility Model Content

[0003] The utility model aims to provide a centering device for inner contours, so as to solve the problem that the centering and marking of the contour of a blank is performed manually by simple measuring rulers and visual readings, which has poor accuracy and low efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A centering device for inner contours is used for centering the inner contours of parts. The centering device comprises an adjusting screw, a frame and a centering rod. The adjusting screw is installed at the center of the frame through a threaded structure. At least two centering rods of equal length are symmetrically arranged and slidably installed on the side of the frame. The inner end of the adjusting screw abuts against the inner end of the centering rod.

[0006] A further technical solution is: symmetrical support rods are installed at both ends of the frame through bolts, and the support rods are against the outer surface of the part.

[0007] A further technical solution is: the support rod is L-shaped.

[0008] A further technical solution is: a height-adjusting pad is installed between the frame and the support rod.

[0009] A further technical solution is: the frame is symmetrically mounted with limit screws through a threaded structure, and the centering rod is provided with a neck portion adapted to the limit screws.

[0010] A further technical solution is: the limit screw is a ball screw.

[0011] A further technical solution is that the adjusting screw is a cone head screw.

[0012] A further technical solution is that an anti-slip pattern is arranged on the top of the adjusting screw.

[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0014] The utility model proposes a centering device for inner contours, which can be put into the inner contour of a measured part, and by adjusting an adjusting screw, a centering rod is automatically extended from the peripheral side of a frame, and contacts and presses against the inner contour of the part, at which time the adjusting screw or the scale thereon is the centering line of the contour, and the device greatly improves the efficiency of centering the inner contour of the measured part and ensures the accuracy of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a centering device for inner contours.

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the middle adjusting screw.

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the structure of the middle frame.

[0018] Figure 4 For this utility model Figure 3 Schematic diagram of the structure from a top-down perspective.

[0019] Figure 5 For this utility model Figure 1 Schematic diagram of the structure of the center-split center pole.

[0020] Figure numerals: 1. adjusting screw; 2. frame; 3. center rod; 4. support rod; 5. height adjustment pad; 6. limit screw; 7. parts. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] In this embodiment, Figure 1 As shown, a centering device for inner contour is used for centering the inner contour of a part 7. The centering device comprises an adjusting screw 1, a frame 2 and a centering rod 3. The adjusting screw 1 is installed at the center of the frame 2 through a threaded structure. At least two centering rods 3 of equal length are symmetrically arranged and slidably installed on the side of the frame 2. The inner end of the adjusting screw 1 abuts against the inner end of the centering rod 3.

[0029] Before centering the inner contour of the measured part 7, first rotate the adjusting screw 1 outward and retract the centering rod 3 into the frame 2. Then, place the entire centering device into the inner contour of the part 7 and keep it stationary. Finally, rotate the adjusting screw 1 inward and push the centering rod 3 outward so that the outer end of the centering rod 3 is pressed against the inner contour of the part 7. This completes the centering, and the adjusting screw or the scale thereon is the centering line of the contour. This device greatly improves the efficiency of centering the inner contour of the measured part and ensures the accuracy of subsequent processing.

[0030] Preferably, symmetrical support rods 4 are mounted on both ends of the frame 2 by bolts, and the support rods 4 abut against the outer surface of the part 7 .

[0031] The device can be supported by the support rod 4 and the top of the part 7, so that the device does not need to be carried manually and is stable.

[0032] Preferably, the support rod 4 is L-shaped.

[0033] The L-shaped support rod 4 makes up for the height difference of the middle rod 3 on the device, making it convenient for the device to be placed in the inner contour of the part 7 for measurement.

[0034] Preferably, a height-adjusting pad 5 is installed between the frame 2 and the support rod 4 .

[0035] The height adjustment spacer 5 is used to adjust the depth of the device into the inner contour of the part 7.

[0036] Embodiment 2: The frame body 2 is symmetrically mounted with the limit screws 6 through a threaded structure, and the center rod 3 is provided with a neck portion adapted to the limit screws 6 .

[0037] The limit screw 6 rubs against the shrinking neck to increase the sliding resistance of the centering rod 3, preventing the centering rod 3 from sliding arbitrarily and causing inaccurate measurement accuracy; the shrinking neck cooperates with the limit screw 6 to also play a limiting role and control the telescopic length of the centering rod 3.

[0038] Preferably, the limit screw 6 is a ball screw.

[0039] The use of the ball screw changes the sliding friction into rolling friction, reduces the friction coefficient, and facilitates the sliding of the center rod 3.

[0040] Preferably, the adjusting screw 1 is a cone head screw.

[0041] When the cone head screw is screwed into the frame body 2, the cone head pushes the center rod 3 to both sides.

[0042] Preferably, an anti-slip pattern is provided on the top of the adjusting screw 1 .

[0043] When the adjusting screw 1 is rotated, the anti-skid pattern on the large head at the top thereof plays an anti-skid role in hand twisting.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An inner contour centering device for centering the inner contour of a part (7), characterized in that: The centering device comprises an adjusting screw (1), a frame (2) and a centering rod (3); the adjusting screw (1) is mounted at the center of the frame (2) via a threaded structure; at least two centering rods (3) of equal length are symmetrically arranged and slidably mounted on the side of the frame (2); the inner end of the adjusting screw (1) abuts against the inner end of the centering rod (3).

2. The inner contour centering device according to claim 1, characterized in that: Symmetrical support rods (4) are mounted on both ends of the frame (2) via bolts, and the support rods (4) abut against the outer surface of the part (7).

3. The inner contour centering device according to claim 2, characterized in that: The support rod (4) is L-shaped.

4. The inner contour centering device according to claim 2, characterized in that: A height-adjusting cushion block (5) is installed between the frame (2) and the support rod (4).

5. The inner contour centering device according to claim 1, characterized in that: The frame body (2) is symmetrically mounted with limit screws (6) via a threaded structure, and the centering rod (3) is provided with a neck portion adapted to the limit screws (6).

6. The inner contour centering device according to claim 5, characterized in that: The limit screw (6) is a ball screw.

7. The inner contour centering device according to claim 1, characterized in that: The adjusting screw (1) is a cone head screw.

8. The inner contour centering device according to claim 1, characterized in that: An anti-slip pattern is provided on the top of the adjusting screw (1).

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