Fixture for three-coordinate detection of gas turbine and nuclear power cylinder product

Abstract

The utility model discloses a clamp for three-coordinate detection of gas turbine and nuclear power cylinder products, which belongs to the field of detection tools matched with nuclear power generation and gas turbine products, and adopts the technical scheme that the clamp comprises a base and a positioning rod, the top of the base is provided with a plurality of positioning mechanisms used for clamping workpieces to be detected, the top of the base is also provided with a positioning rod mounting part, and the positioning rod is rotatably assembled on the positioning rod mounting part. The utility model has the advantages that the clamping and positioning precision is high in the detection process, the interchange universality of the measurement positioning and the processing positioning of the detection part is strong, the manpower resource is reduced, and the detection automation is realized.

Description

Technical Field

[0001] The utility model relates to the field of high-efficiency and high-precision detection of nuclear power generation and gas turbine products, in particular to a fixture for three-coordinate detection of gas turbine and nuclear power cylindrical products. Background Art

[0002] Gas turbine is an internal combustion power machine that uses continuous flowing gas as working fluid to drive the impeller to rotate at high speed, converting the energy of fuel into useful work. It is a rotary impeller heat engine. Nuclear power control rod drive mechanism is one of the components of nuclear power plant reactors. It is an important moving part. Its function is to control the reactivity of the core. Its performance directly affects the reliability and safety of nuclear reactor operation. It is one of the indispensable nuclear power equipment.

[0003] With the continuous acceleration of intelligent manufacturing, composite high-precision positioning fixtures are an indispensable key part of the entire process; the country continues to promote the increase in gas turbine and nuclear power holdings, which has brought huge opportunities and challenges to the development of manufacturing companies; industrial scale expansion, high-quality stabilization, and efficient manufacturing processes are necessary tasks for all industries at this stage.

[0004] After the production of gas turbine and nuclear power cylindrical products, three-coordinate detection is required. The existing three-coordinate detection generally adopts a simple support and fixation method. During the detection process, due to the various specifications, there is no universal positioning fixture compatible with it. The positioning point is difficult to capture and the positioning is inaccurate. It takes a lot of time to locate, which makes detection and positioning difficult and delays detection efficiency. Utility Model Content

[0005] The purpose of the invention of the utility model is to provide a three-coordinate detection fixture for gas turbine and nuclear power cylindrical products in view of the above-mentioned problems, which has the advantages of convenient repeated positioning, high positioning accuracy, strong interchangeability of detection products and high detection efficiency.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A fixture for three-coordinate detection of gas turbine and nuclear power cylindrical products, characterized in that it includes a base and a positioning rod. The top of the base has a placement surface, and the top of the base is provided with a plurality of positioning mechanisms for clamping the workpiece to be measured. The top of the base is also provided with a positioning rod mounting portion, and the positioning rod can be rotatably assembled on the positioning rod mounting portion.

[0008] Furthermore, a plurality of bosses are arranged on the top of the base, the top surfaces of the plurality of bosses form a placement surface, and the positioning mechanism is arranged on the bosses.

[0009] Furthermore, the base is a hollow cylindrical body, and an assembly hole is provided in the middle of the hollow bottom, and the base is fixed on the workbench through the assembly hole.

[0010] Furthermore, at least three positioning mechanisms are provided.

[0011] Furthermore, the positioning mechanism includes a mounting seat and a tightening screw, the mounting seat is provided with a threaded hole, and the tightening screw matches the threaded hole.

[0012] Furthermore, a clamping positioning block is provided on the inner side of the mounting seat, and the clamping positioning block moves inwardly through a tightening screw to clamp the workpiece to be measured.

[0013] Furthermore, the clamping positioning block is provided with an inner arc surface and an outer arc surface, the inner arc surface is a workpiece clamping surface, and the outer arc surface is used as a positioning reference surface with the base, and the clamping positioning block can slide along the top surface of the base.

[0014] Furthermore, the positioning rod mounting portion includes a first assembly portion and a second assembly portion, a gap for installing the positioning rod is arranged between the first assembly portion and the second assembly portion, the first assembly portion and the second assembly portion are also matched with through holes, the positioning rod is provided with corresponding through holes, and the positioning rod can be rotatably assembled on the positioning rod mounting portion through a matching pin through the through hole and the assembly hole.

[0015] Furthermore, the positioning rod includes a hook head and a long handle, and the hook head is an inclined surface or a frustum.

[0016] Furthermore, the adjustable range of the hook head size is 30-200 mm.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The clamping repeat positioning accuracy during the detection process is high, up to 0.01mm. It has unlimited versatility in the measurement positioning and processing positioning of this type of workpiece to be tested, and each model can be converted into multiple types of workpiece applications, with great interchangeability and strong interchangeability.

[0019] 2. Double concentric arcs with high positioning accuracy, straight plane and small plane on the screw end are combined for tightening, which can realize self-centering and alignment, and the direction of clamping force remains unchanged.

[0020] 3. The positioning rod is in contact with the workpiece feature surface to solve the inaccurate positioning caused by the feature errors of the equal inclined surface and the frustum effective plane workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2It is a schematic diagram of the structure of the top view of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the utility model for assembling a workpiece to be inspected;

[0024] Figure 4 It is a top view of the workpiece to be inspected after being clamped;

[0025] Figure 5-1 is one of the structural schematic diagrams of the positioning rod of the utility model;

[0026] Figure 5-2 is a second schematic diagram of the structure of the positioning rod of the utility model;

[0027] Figure 5-3 is a third schematic diagram of the structure of the positioning rod of the utility model;

[0028] FIG. 5-4 is a fourth schematic diagram of the structure of the positioning rod of the utility model.

[0029] 1. Base; 2. Positioning rod; 3. Boss; 4. Screw; 5. Pin; 6. Clamping positioning block; 7. Mounting seat; 8. Workpiece to be inspected; 9. Hook head; 10. Long handle. DETAILED DESCRIPTION

[0030] The utility model is described in detail below in conjunction with the accompanying drawings.

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] like Figure 1 —As shown in Figure 5-4, the utility model describes a three-coordinate detection fixture for gas turbine and nuclear power cylindrical products, comprising a base 1 and a positioning rod 2. The top of the base 1 has a placement surface, and the top of the base 1 is provided with a plurality of positioning mechanisms for clamping a workpiece 8 to be measured. The top of the base 1 is also provided with a positioning rod mounting portion, and the positioning rod 2 can be rotatably assembled on the positioning rod mounting portion.

[0033] As a more specific design, a plurality of bosses 3 are provided on the top of the base 1, and the top surfaces of the plurality of bosses form a placement surface. The positioning mechanism is provided on the boss 3, and the boss 3 is provided in a plurality of "V" shapes of different sizes. A groove is provided between the bosses 3 and the bosses 3. This design can reduce the friction between the workpiece to be inspected and the three-coordinate detection fixture, and reduce the load-bearing burden of the detection fixture.

[0034] As a more specific design, the base 1 is a cylindrical body with a hollow bottom. During the assembly process of the utility model product, the base 1 is fixed to the workbench through the equipment hole set in the middle of the hollow bottom of the base 1, and the base 1 is installed and adjusted. This method facilitates the picking up of the workpiece 8 to be inspected during the inspection process and the stability of the inspection fixture.

[0035] As a more specific design, there are at least three positioning mechanisms, which are respectively arranged at the intersection of the top placement surface of the base 1 and the edge of the vertical surface of the base 1. The significance of this design method is to determine the horizontal plane through three plane positioning points.

[0036] As a more specific design, the positioning mechanism includes a mounting seat 7 and a tightening screw 4. The mounting seat 7 is provided with a threaded hole, and the tightening screw 4 matches the threaded hole. When performing inspection, the tightening screw 4 is installed into the matching threaded through hole, and the other two screws 4 are in a free state at this time, which are mainly used to adjust individual special parts for inspection when necessary.

[0037] As a more specific design, a clamping positioning block 6 is provided on the inner side of the mounting seat 7. The tightening screw 4 squeezes the clamping positioning block 6. The clamping positioning block 6 moves inward through the tightening screw 4 to clamp the workpiece 8 to be tested, thereby clamping the workpiece. At the same time, the positioning rod 2 is pressed to the assembly hole and then released, and the positioning rod 5 is pulled down and placed on the lower side of the base 1. The significance of this design method is that, on the one hand, it is convenient for loading and unloading the workpiece 8 to be tested, and on the other hand, the clamping positioning accuracy of the workpiece 8 to be tested can be controlled within 0.01mm during the entire detection process, and the clamping repeat positioning accuracy is high.

[0038] As a more specific design, the clamping positioning block 8 is provided with an inner arc surface and an outer arc surface. The inner arc surface is the clamping surface of the workpiece and can be designed and adjusted according to the actual outer circle size of the workpiece. The outer arc surface is used as the positioning reference surface with the base. The clamping positioning block 8 can slide along the top surface of the base. The significance of this design is that the two arc surfaces and the hollow cylindrical base at the bottom form double concentric arcs with high positioning accuracy. The straight plane and the spherical small plane at the top of the screw are combined and tightened to achieve self-centering and alignment, and the direction of the clamping force remains unchanged.

[0039] As a more specific design, the positioning rod mounting portion includes a first assembly portion and a second assembly portion, a gap for mounting the positioning rod 2 is arranged between the first assembly portion and the second assembly portion, the first assembly portion and the second assembly portion are also matched with through holes, the positioning rod 2 is provided with corresponding through holes, and the positioning rod can be rotatably assembled on the positioning rod mounting portion by matching the through holes and the assembly holes with a pin.

[0040] As a more specific design, the positioning rod 2 includes a hook head 9 and a long handle 10. The hook head 9 is a bevel or a cone. In order to effectively control the positioning accuracy during detection, the bevel amount of the bevel at the large and small ends is designed to be half of the tolerance, and the cone amount of the large and small ends of the cone is designed to be half of the tolerance. Each model can be converted into multiple types of workpiece applications and has good interchangeability.

[0041] As a more specific design, the size and length of the hook head 9 are adjustable. Specifically, the size of the hook head 9 is adjustable within a range of 30-200 mm to meet the needs of a fixture for detecting similar internal parts.

[0042] Specific implementation process:

[0043] 1. Fix the base 1 to the workbench through the screw holes at the middle bottom of the base 1, and install and adjust the base 1;

[0044] 2. According to the actual detection requirements, select the clamping and positioning block 6 suitable for the workpiece 8 to be tested, place the workpiece 8 to be tested on the plane of the base 1, select the appropriate positioning rod 2, fix the test workpiece 8 on the base 1 through the latch 5 to achieve rotation, turn it to the appropriate position, and then place the hook head 9 of the positioning rod 2 in the corresponding positioning hole of the workpiece, assemble the positioning mounting part and the positioning rod 2 on the workpiece 8 to be tested through the latch 5 to fix the positioning rod 2, and then install the tightening screw 4 into the threaded through hole, tighten the screw 4 to squeeze the clamping and positioning block 6 to achieve workpiece compression;

[0045] 3. Press the positioning rod 2 at the same time until the screw 4 is tightened and then loosened. Pull down the positioning rod 2 and place it on the lower side of the base 1. The other two screws are in a free state at this time. They are mainly used to adjust individual special parts for inspection when necessary.

[0046] 4. After inspecting the workpiece, loosen the screw 4 on the base 1 to complete the inspection process.

[0047] To sum up, the utility model of a fixture for three-coordinate detection of gas turbines and nuclear power cylindrical products solves the problems of inaccurate positioning, incompatible and non-universal fixtures, and low detection efficiency in the traditional three-coordinate detection process. On the basis of the traditional detection method, the technical scheme realizes innovation in structural design by arranging multiple positioning mechanisms and positioning rod mounting parts for clamping the workpiece to be inspected on the top of the base. During the detection process, the clamping and repeated positioning accuracy of the workpiece to be inspected is high. At the same time, it realizes compatibility and universality in the measurement positioning and processing positioning of such workpieces to be inspected, automates the detection, and saves human resource costs.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture for three-coordinate detection of gas turbine and nuclear power cylindrical products, characterized in that: The invention comprises a base (1) and a positioning rod (2); the top of the base (1) has a placement surface; the top of the base (1) is provided with a plurality of positioning mechanisms for clamping a workpiece (8) to be measured; the top of the base (1) is also provided with a positioning rod mounting portion; the positioning rod (2) is rotatably mounted on the positioning rod mounting portion.

2. A three-coordinate detection fixture for gas turbine and nuclear power cylindrical products as claimed in claim 1, characterized in that: A plurality of bosses (3) are arranged on the top of the base (1); the top surfaces of the plurality of bosses (3) form a placement surface; and the positioning mechanism is arranged on the bosses (3).

3. A three-coordinate detection fixture for gas turbine and nuclear power cylindrical products as claimed in claim 2, characterized in that: The base (1) is a hollow cylindrical body, and an assembly hole is provided in the middle of the hollow bottom, through which the base (1) is fixed on the workbench.

4. A three-coordinate detection fixture for gas turbine and nuclear power cylindrical products as claimed in claim 1, characterized in that: The number of the positioning mechanisms is at least three.

5. A three-coordinate detection fixture for gas turbine and nuclear power cylindrical products as claimed in claim 1, characterized in that: The positioning mechanism comprises a mounting seat (7) and a tightening screw (4); a threaded hole is provided on the mounting seat, and the tightening screw (4) matches the threaded hole.

6. A three-coordinate detection fixture for gas turbine and nuclear power cylindrical products as claimed in claim 5, characterized in that: A clamping positioning block (6) is provided on the inner side of the mounting seat (7), and the clamping positioning block (6) moves inwardly through a tightening screw (4) to clamp the workpiece (8) to be measured.

7. A three-coordinate inspection fixture for combustion engine and nuclear power cylindrical products as claimed in claim 6, characterized in that: The clamping positioning block (6) is provided with an inner arc surface and an outer arc surface, the inner arc surface is a workpiece clamping surface, and the outer arc surface is used as a positioning reference surface with the base, and the clamping positioning block (6) can slide along the top surface of the base (1).

8. A three-coordinate inspection fixture for combustion engine and nuclear power cylindrical products as claimed in claim 1, characterized in that: The positioning rod mounting portion comprises a first assembly portion and a second assembly portion, a gap for mounting the positioning rod (2) is provided between the first assembly portion and the second assembly portion, the first assembly portion and the second assembly portion are also matched with through holes, the positioning rod (2) is provided with a corresponding assembly hole, and the positioning rod can be rotatably assembled on the positioning rod mounting portion through a matching pin of the through hole and the assembly hole.

9. A three-coordinate detection fixture for combustion engine and nuclear power cylindrical products as claimed in claim 8, characterized in that: The positioning rod (2) comprises a hook head (9) and a long handle (10), and the hook head (9) is an inclined surface or a frustum.

10. A three-coordinate inspection fixture for combustion engine and nuclear power cylindrical products as claimed in claim 9, characterized in that: The adjustable range of the hook head (9) size is 30-200 mm.

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