Symmetry degree precision measuring device for machined parts

Abstract

The utility model discloses a machining part symmetry degree precision measuring device which comprises a detection table body, a first servo electric cylinder is fixedly installed on the upper surface of the detection table body, a lifting table is fixedly connected to the upper surface of a piston rod of the first servo electric cylinder, and the inner wall of the lifting table is movably sleeved with symmetrically-distributed guide rods. One ends of the two guide rods are fixedly connected with the upper surface of the detection table body, a second servo electric cylinder is fixedly installed on the upper surface of the lifting table, one end of a piston rod of the second servo electric cylinder is fixedly connected with a detection block, and a stroke groove is formed in the lower surface of the detection block. According to the utility model, the two sides of raw materials with different widths can be symmetrically detected through the adjusting device, the detection range is enlarged, the operation is convenient, and the symmetry condition of the two sides of the raw materials can be more accurately observed through the numerical display of the pressure sensor, so that the effect of improving the accuracy of the detection result is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a measuring device for the symmetry accuracy of machined parts. Background Technique

[0002] For the symmetry detection technology of machined parts, the dial indicator method or the special device detection method is usually adopted. According to the complexity of the part structure, an appropriate detection method is taken. The dial indicator method is suitable for single-piece production with low efficiency. Traditional special devices for detecting the symmetry requirements of two machining elements are more common. Such devices have a simple structure and fewer detection elements. The current measuring devices can only measure a single product, and cannot adapt to the size or height of the parts. At present, most tools are manual measurements, resulting in large errors and inaccurate data. And the symmetry uniformity is measured by approaching the object with a measuring needle. However, some measuring needles will bend and the needle tips will wear after long-term use or long-term friction with the base, resulting in problems such as needle tip damage and equipment abnormalities.

[0003] For example, a measuring device for the symmetry accuracy of machined parts disclosed in a Chinese patent document (Publication No.: CN220489949U). Although this patent adds a fixing rod on one side of the threaded rod inside the sleeve rod, the fixing rod is composed of multiple fixing columns with intervals left in the middle of the fixing columns. A product with holes can be placed at the center position of the fixing group for measurement. And inside the main body, through gear transmission, the movement of the measuring rod can be more precisely controlled to obtain data, achieving the purpose of reducing the error of the obtained data. By adding a measuring seat on one side of the base and adding grooves on the surface of the measuring seat, the contact area between the measuring needle tip and the measuring seat is reduced. At the same time, the sharp angle of the measuring needle is changed to a rounded angle to prevent the occurrence of needle collision, achieving the purpose of reducing the occurrence of equipment abnormalities and reducing the wear of the base.

[0004] However, the measuring needle can only detect the symmetry above the raw material. When the two sides of some raw materials are trimmed and the symmetry of the two sides needs to be detected, it cannot be used, resulting in a single detection performance. And the distance between the two measuring needles is fixed and cannot be adjusted according to the width of the raw material, thus leading to the problem of low applicability. Content of the Utility Model

[0005] The purpose of the utility model is to provide a measuring device for the symmetry accuracy of machined parts to solve the problems raised in the above background technique, that is, the existing measuring needle can only detect the symmetry above the raw material. When the two sides of some raw materials are trimmed and the symmetry of the two sides needs to be detected, it cannot be used, resulting in a single detection performance. And the distance between the two measuring needles is fixed and cannot be adjusted according to the width of the raw material, thus leading to the problem of low applicability.

[0006] To solve the above technical problems, the present utility model is achieved through the following technical solutions:

[0007] The present utility model is a device for measuring the symmetry accuracy of machined parts, including a detection table body. A first servo electric cylinder is fixedly installed on the upper surface of the detection table body. The upper surface of the piston rod of the first servo electric cylinder is fixedly connected to a lifting table. The inner wall of the lifting table is movably sleeved with symmetrically distributed guide rods. One end of each of the two guide rods is fixedly connected to the upper surface of the detection table body. A second servo electric cylinder is fixedly installed on the upper surface of the lifting table. One end of the piston rod of the second servo electric cylinder is fixedly connected to a detection block. A travel groove is formed on the lower surface of the detection block;

[0008] An adjustment device is provided inside the detection block, and the adjustment device includes a bidirectional lead screw. One end of the bidirectional lead screw is installed on the inner wall of one side of the detection block through a bearing.

[0009] Furthermore, the other end of the bidirectional lead screw penetrates and extends to the side surface of the detection block. A servo motor is fixedly installed on the side surface of the detection block. The output shaft of the servo motor is fixedly connected to the other end of the bidirectional lead screw through a coupling. Symmetrically distributed threaded blocks are threadedly connected to the outer surface of the bidirectional lead screw.

[0010] Furthermore, a moving block is fixedly connected to the lower surface of the threaded block. One end of each of the two moving blocks penetrates the travel groove and extends to the lower surface of the detection block. Symmetrically distributed mounting blocks are fixedly connected to the opposite surfaces of the two moving blocks.

[0011] Furthermore, a pressure sensor is fixedly installed on the inner wall of one side of the mounting block. An active block is movably sleeved in the inner wall of the mounting block. A positioning ball groove is formed on the side surface of the active block.

[0012] Furthermore, a sliding ball is slidably sleeved in the inner wall of the positioning ball groove. A support spring is fixedly connected to the other side surface of the active block. One end of the support spring is fixedly connected to a pressing plate.

[0013] Furthermore, the outer surface of the pressing plate is movably sleeved with the inner wall of the mounting block. One side surface of the pressing plate is in contact with one end of the pressure sensor. A guiding chute is formed on the inner top wall of the mounting block. A guiding slider is slidably connected to the inner wall of the guiding chute. The lower surface of the guiding slider is fixedly connected to the upper surface of the active block. A positioning mechanism is provided on the upper surface of the detection table body.

[0014] Compared with the prior art, the advantages of the present utility model are:

[0015] The utility model realizes symmetric detection of both sides of raw materials with different widths by setting an adjusting device, which not only improves the detection range, is convenient to operate, but also shows the values of pressure sensors, enabling more accurate observation of the symmetry of both sides of the raw materials, thus improving the accuracy of detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0017] Figure 1 Schematic diagram of the main components of the present utility model;

[0018] Figure 2 Three-dimensional view of the lifting table structure of the present utility model;

[0019] Figure 3 Three-dimensional view of the detection block structure of the present utility model;

[0020] Figure 4 Three-dimensional view of the mounting block structure of the present utility model;

[0021] Figure 5 Exploded view of the movable block structure of the present utility model.

[0022] In the drawings, the list of components represented by each reference numeral is as follows:

[0023] 1. Detection table body; 2. First servo electric cylinder; 3. Lifting table; 4. Guide rod; 5. Second servo electric cylinder; 6. Detection block; 7. Stroke groove; 8. Bidirectional lead screw; 81. Servo motor; 82. Threaded block; 83. Moving block; 84. Mounting block; 85. Pressure sensor; 86. Movable block; 87. Positioning ball groove; 88. Sliding ball; 89. Support spring; 810. Pressing plate; 811. Guide chute; 812. Guide slider; 9. Positioning mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of description, the cross-sectional views showing the device structure will be locally enlarged out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0027] To make the objectives, technical solutions, and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] Please refer to Figures 1-5 As shown in the figure, this embodiment is a device for measuring the symmetry accuracy of a machining part, including a detection table body 1. A first servo electric cylinder 2 is fixedly installed on the upper surface of the detection table body 1. The upper surface of the piston rod of the first servo electric cylinder 2 is fixedly connected to a lifting table 3. Guide rods 4 distributed symmetrically are movably sleeved inside the lifting table 3. One ends of the two guide rods 4 are fixedly connected to the upper surface of the detection table body 1. A second servo electric cylinder 5 is fixedly installed on the upper surface of the lifting table 3. One end of the piston rod of the second servo electric cylinder 5 is fixedly connected to a detection block 6. A travel groove 7 is opened on the lower surface of the detection block 6;

[0029] An adjustment device is arranged inside the detection block 6, and the adjustment device includes a bidirectional lead screw 8. One end of the bidirectional lead screw 8 is installed on the inner wall of one side of the detection block 6 through a bearing.

[0030] The other end of the bidirectional lead screw 8 penetrates and extends to the surface of one side of the detection block 6. A servo motor 81 is fixedly installed on the surface of one side of the detection block 6. The output shaft of the servo motor 81 is fixedly connected to the other end of the bidirectional lead screw 8 through a coupling. Threaded blocks 82 distributed symmetrically are threadedly connected to the outer surface of the bidirectional lead screw 8. The lower surface of the threaded block 82 is fixedly connected to a moving block 83. One ends of the two moving blocks 83 penetrate the travel groove 7 and extend to the lower surface of the detection block 6. The opposite surfaces of the two moving blocks 83 are fixedly connected to mounting blocks 84 distributed symmetrically. A pressure sensor 85 is fixedly installed on the inner wall of one side of the mounting block 84. A movable block 86 is movably sleeved inside the inner wall of the mounting block 84. A positioning ball groove 87 is opened on the surface of one side of the movable block 86.

[0031] The servo motor 81 drives the bidirectional lead screw 8 to rotate clockwise. The rotation of the bidirectional lead screw 8 drives the two threaded blocks 82 to move relatively through the limit cooperation of the travel groove 7, so as to drive the mounting blocks 84 to move relatively through the moving blocks 83, so as to be applicable to detecting raw materials with different widths and improve the scope of application.

[0032] A sliding ball 88 is sleeved on the inner wall of the positioning ball groove 87 in a sliding manner. A support spring 89 is fixedly connected to the other side surface of the movable block 86. One end of the support spring 89 is fixedly connected to a pressing plate 810. The outer surface of the pressing plate 810 is movably sleeved on the inner wall of the mounting block 84. One side surface of the pressing plate 810 is in contact with one end of a pressure sensor 85. A guiding chute 811 is provided on the inner top wall of the mounting block 84. A guiding slider 812 is slidably connected to the inner wall of the guiding chute 811. The lower surface of the guiding slider 812 is fixedly connected to the upper surface of the movable block 86. A positioning mechanism 9 is arranged on the upper surface of the detection table body 1.

[0033] The extrusion force generated after the sliding ball 88 fits on both sides of the raw material drives the movable block 86 to move through the cooperation of the guiding chute 811 and the guiding slider 812. The movement of the movable block 86 squeezes the support spring 89. The extrusion force of the support spring 89 squeezes the pressure sensor 85 through the pressing plate 810. The sliding ball 88 is positioned and slides in the positioning ball groove 87, which plays a role in reducing the friction generated during detection.

[0034] By setting the adjusting device, it realizes the symmetrical detection of both sides of raw materials with different widths, not only improving the detection range, but also being convenient to operate. Moreover, the numerical display of the pressure sensor 85 enables more accurate observation of the symmetry of both sides of the raw material, thus improving the accuracy of the detection result.

[0035] Working principle: Step 1, place the raw material to be detected above the detection table body 1, and then push the raw material to the center of the detection table body 1 for limitation through the positioning mechanism 9. Then start the first servo electric cylinder 2 to retract the piston rod. The retraction of the piston rod of the first servo electric cylinder 2 drives the lifting table 3 to stably descend through the cooperation of the guiding rod 4. The descending movement of the lifting table 3 drives the detection block 6 to descend through the second servo electric cylinder 5. The descending movement of the detection block 6 drives the mounting block 84 to descend to both sides of the raw material;

[0036] Step 2, start the servo motor 81 to drive the bidirectional lead screw 8 to rotate clockwise. The rotation of the bidirectional lead screw 8 drives the two threaded blocks 82 to move relatively through the limiting cooperation of the stroke groove 7, so as to drive the mounting block 84 to move relatively through the moving block 83. The movement of the mounting block 84 makes the sliding ball 88 fit on both sides of the raw material. The extrusion force generated after the sliding ball 88 fits on both sides of the raw material drives the movable block 86 to move through the cooperation of the guiding chute 811 and the guiding slider 812. The movement of the movable block 86 squeezes the support spring 89. The extrusion force of the support spring 89 squeezes the pressure sensor 85 through the pressing plate 810;

[0037] Step 3: At this time, the values displayed by the two pressure sensors 85 are the same. Then, start the piston rod of the second servo electric cylinder 5 to extend. The extension of the piston rod of the second servo electric cylinder 5 drives the detection block 6 to move along the raw material, thereby driving the sliding ball 88 to slide along both sides of the raw material. At the same time, the first servo electric cylinder 2 can perform telescopic movement, thereby driving the sliding ball 88 to move up and down for detection. When the difference between the values displayed by the two pressure sensors 85 exceeds the preset value, it indicates that the two sides of the raw material are asymmetric and a deviation occurs. When the difference between the values displayed by the two pressure sensors 85 is within the preset value, it indicates that the two sides of the raw material are symmetric.

[0038] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" 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, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring the symmetry accuracy of a machined part, comprising a detection table body (1), characterized in that: A first servo electric cylinder (2) is fixedly installed on the upper surface of the detection table body (1). The upper surface of the piston rod of the first servo electric cylinder (2) is fixedly connected to a lifting table (3). The inner wall of the lifting table (3) is movably sleeved with guide rods (4) distributed symmetrically. One end of each of the two guide rods (4) is fixedly connected to the upper surface of the detection table body (1). A second servo electric cylinder (5) is fixedly installed on the upper surface of the lifting table (3). One end of the piston rod of the second servo electric cylinder (5) is fixedly connected to a detection block (6). A travel groove (7) is opened on the lower surface of the detection block (6). An adjusting device is arranged inside the detection block (6), and the adjusting device includes a bidirectional lead screw (8). One end of the outer surface of the bidirectional lead screw (8) is installed on the inner wall of one side of the detection block (6) through a bearing.

2. The symmetricity precision measuring device for a machined part according to claim 1, characterized in that, The other end of the bidirectional lead screw (8) penetrates and extends to the surface of one side of the detection block (6). A servo motor (81) is fixedly installed on the surface of one side of the detection block (6). The output shaft of the servo motor (81) is fixedly connected to the other end of the bidirectional lead screw (8) through a coupling. Threaded blocks (82) distributed symmetrically are threadedly connected to the outer surface of the bidirectional lead screw (8).

3. A symmetry accuracy measuring device for a machined part according to claim 2, characterized in that, The lower surface of the threaded block (82) is fixedly connected to a moving block (83). One end of each of the two moving blocks (83) penetrates the travel groove (7) and extends to the lower surface of the detection block (6). Symmetrically distributed mounting blocks (84) are fixedly connected to the opposite surfaces of the two moving blocks (83).

4. A symmetry accuracy measuring device for a machined part according to claim 3, characterized in that, A pressure sensor (85) is fixedly installed on the inner wall of one side of the mounting block (84). An active block (86) is movably sleeved in the inner wall of the mounting block (84). A positioning ball groove (87) is opened on the surface of one side of the active block (86).

5. A device for measuring the symmetry accuracy of a machined part according to claim 4, characterized in that, A sliding ball (88) is slidably sleeved in the inner wall of the positioning ball groove (87). A support spring (89) is fixedly connected to the surface of the other side of the active block (86). One end of the support spring (89) is fixedly connected to a pressing plate (810).

6. The symmetry accuracy measurement device for a machined part according to claim 5, characterized in that The outer surface of the pressing plate (810) is movably sleeved in the inner wall of the mounting block (84). One side surface of the pressing plate (810) is in contact with one end of the pressure sensor (85). A guiding chute (811) is opened on the inner top wall of the mounting block (84). A guiding slider (812) is slidably connected to the inner wall of the guiding chute (811). The lower surface of the guiding slider (812) is fixedly connected to the upper surface of the active block (86). A positioning mechanism (9) is arranged on the upper surface of the detection table body (1).

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