L-shaped ring avoiding groove boundary dimension positioning and cutting device

Abstract

The utility model discloses an L-shaped ring hiding groove boundary dimension positioning and cutting device which comprises a base assembly, a supporting column assembly and a positioning ring assembly. The two ends of the supporting assembly are detachably connected with the base assembly and the positioning ring assembly respectively. The center of the positioning ring assembly and the center of a positioning disc of the base assembly are kept coaxial, and meanwhile the center of the positioning disc of the center of the base assembly and the cutting center of the laser cutting platform are kept coaxial, so that the laser cutting equipment platform and the positioning ring assembly are coaxial, and it is guaranteed that a laser cutting probe automatically finds a reference center when cutting an L-shaped ring. And a pressing plate on the positioning ring assembly ensures that the L-shaped ring is attached to the positioning ring assembly during cutting, and the consistency of the sizes of the cut avoiding grooves is ensured. According to the utility model, the processing mode of the existing hiding groove is changed according to the radiator manufacturing process and the external field installation requirement, the processing mode is consistent with the actual assembly requirement of the radiator, and the control and inspection of the boundary dimension and the position dimension of the hiding groove of the radiator are realized.

Description

Technical Field

[0001] The utility model relates to a positioning cutting device for the external dimension of the avoidance groove of an L-shaped ring part, belonging to the technical field of machining. Background Technique

[0002] As Figure 2 shown, the L-shaped ring (axial section is L-shaped) is assembled on the rear end face of the radiator, and the whole is of a rotary structure. The L-shaped ring is assembled inside the aircraft body together with the radiator. The inner diameter of the L-shaped ring is about Φ914mm, and the outer diameter is about Φ970mm. The cross section is L-shaped, and the specific requirements for the dimensions of the 4 avoidance grooves on the side end face of the L-shaped ring are as follows:

[0003] 1) The chord length dimension of the avoidance groove on the arc surface is 130mm;

[0004] 2) The height dimension of the avoidance groove starting from the end face of the L-shaped ring is 6mm;

[0005] 3) The dimensions of the 4 avoidance grooves from the center line are -1.5°, 26.5°, 125.5°, and 153.5° respectively.

[0006] At present, the processing method for the 4 avoidance grooves on the part is as follows: after the L-shaped ring is assembled on the component, the operator manually draws a line on the part to mark the external shape of the avoidance groove, and then uses an angle grinder to grind and fit along the drawn external shape. However, there are large processing errors in the manual processing of the avoidance groove, and there are large differences in the relative position dimensions of the 4 avoidance grooves, resulting in secondary grinding and fitting of the 4 avoidance grooves during the final installation of the product.

[0007] To sum up, in order to solve the installation coordination and consistency problems of the 4 avoidance grooves on the rear end face of the product, improve the processing accuracy and efficiency of the product, and achieve the effect of improving quality and increasing efficiency, it is necessary to design a positioning cutting device for the external dimension of the part avoidance groove to comprehensively solve the above problems. Summary of the Invention

[0008] In order to solve the above problems, the utility model aims to provide a positioning cutting device for the external dimension of the avoidance groove of an L-shaped ring. By designing and manufacturing a split-type combined positioning device with a mechanical structure and cooperating with the existing laser cutting platform, the processing of the external dimension and relative position dimension of multiple avoidance grooves on the L-shaped ring can be realized.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A positioning cutting device for the external dimension of the avoidance groove of an L-shaped ring includes

[0011] a base assembly, the base assembly includes a base and a positioning disk, the positioning disk is detachably connected to the center of the base, a positioning hole is opened at the center position of the positioning disk, and the base assembly is coaxially connected to the laser cutting platform through the positioning hole on the positioning disk;

[0012] A support column assembly, the first end of the support column assembly is detachably connected to the end face of the base, and multiple support column assemblies are distributed on the same circumference with the center of the positioning hole of the positioning disk as the center of the circle;

[0013] A positioning ring assembly, the positioning ring assembly is detachably connected to the second end of the support column assembly. An annular protrusion is coaxially arranged on one end face of the positioning ring assembly. The outer diameter of the outer ring of the annular protrusion is equal to the inner diameter of the L-shaped ring. Multiple pressing plates are arranged on the end face of the annular protrusion, so that a pressing and limiting space for the L-shaped ring is formed between the end face of the positioning ring assembly, the outer ring face of the annular protrusion and the pressing plates.

[0014] Furthermore, a first connecting mandrel and a threaded hole are also arranged on the end face of the base. The first end of the support column assembly is positioned with the base through the first connecting mandrel and is connected to the threaded hole of the base by a connecting bolt.

[0015] Furthermore, the base includes:

[0016] An outer ring and an inner ring arranged concentrically and coplanarly;

[0017] Support plates, one end of multiple support plates is connected to the outer ring face of the inner ring, and the other end is connected to the inner ring face of the outer ring;

[0018] An outer lug, the outer lug is arranged on the outer ring face of the outer ring to form a plane for installing the support column assembly.

[0019] Furthermore, a second connecting mandrel is arranged at the second end of the support column assembly.

[0020] Furthermore, the positioning ring assembly includes a positioning ring. The positioning ring is an annular part. Multiple connecting lugs are arranged on the outer ring surface of the positioning ring, and it is connected to the second end of the support column assembly through the through holes on the connecting lugs.

[0021] Furthermore, the pressing plates are detachably connected to the annular protrusion by pressing plate bolts.

[0022] Furthermore, multiple protrusions along the radial direction of the positioning ring are arranged on the inner ring surface of the positioning ring, and the protrusion positions are used as the installation positions of the pressing plates.

[0023] Furthermore, the number of the pressing plates is one more than the number of the avoiding grooves of the L-shaped ring, and the area between any two adjacent pressing plates is used as the avoiding groove cutting area.

[0024] Compared with the prior art, the positioning and cutting device of the present utility model has the following characteristics:

[0025] 1. The positioning and cutting device is designed with a simple structure, convenient to use, easy to disassemble and assemble. The split-type combined design (the base assembly, support column assembly and positioning ring assembly are detachably connected) facilitates storage and handling.

[0026] 2. When using this positioning and cutting device in combination with laser cutting, the outer shape dimensions of the avoidance groove are highly accurate. (In the existing method of manual scribing and grinding with an angle grinder for repair, the L-shaped ring is processed for the avoidance groove under the condition that the flatness and roundness of the end face are uncertain. The processing results of different L-shaped rings have poor consistency, there is no common reference, the position and size deviation of the avoidance groove are large, subsequent assembly is difficult, and secondary repair is mostly required.) And it can play a role in detecting whether the part dimensions are qualified. Among them, the annular protrusion on the positioning ring can ensure that the L-shaped ring is cut under the condition of qualified roundness, while the pressing plate and the end face of the positioning ring can ensure that the L-shaped ring is cut under the condition of qualified flatness. The annular protrusion on the positioning ring facilitates programming and positioning of the laser cutting equipment, and the combined use of the base assembly and the positioning ring assembly ensures the coaxiality of the L-shaped ring and the laser cutting equipment.

[0027] 3. Using this positioning and cutting device can save manpower and avoid damage to the appearance of parts during the manual repair process, ensuring the appearance and weight of the parts.

[0028] 4. The combined use of the first connecting mandrel and the second connecting mandrel enables the center of the positioning ring assembly to maintain the coaxiality requirement with the center of the positioning disk of the base assembly, thus ensuring the accuracy of the reference during subsequent laser cutting.

[0029] After tracking and measuring the actual installation of multiple sets of products, the avoidance grooves processed by using this positioning and cutting device did not interfere during the installation of the products. The installation interchangeability and consistency are better, and it can fully meet the installation requirements of the main engine. Description of the Drawings

[0030] Figure 1 It is the assembly drawing of the L-shaped ring avoidance groove outer shape dimension cutting and positioning device designed for the utility model;

[0031] Figure 2 It is a schematic diagram of the outer shape of the L-shaped ring (with an avoidance groove);

[0032] Figure 3 It is the structure diagram of the base assembly;

[0033] Figure 4 It is the structure diagram of the support column assembly;

[0034] Figure 5 It is the structure diagram of the positioning ring assembly;

[0035] In the figure: 1 - base assembly, 2 - support column assembly, 3 - positioning ring assembly, 11 - connecting bolt, 12 - first connecting core shaft, 13 - base, 14 - positioning disk, 21 - second connecting core shaft, 22 - support column, 31 - positioning ring, 32 - pressing plate, 33 - pressing plate bolt. Detailed implementation manners

[0036] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present utility model is limited to the following embodiments. Without departing from the above technical idea of the present utility model, all modifications, substitutions, and changes made according to ordinary technical knowledge and customary means in the art are included in the scope of the present utility model.

[0037] As Figure 2 shown, it is an L-shaped ring to be processed by the present utility model. Due to the special structure of this part, there are 4 avoidance grooves ( Figure 2 the four positions A, B, C, and D shown in the figure) on the side end face. When assembling the part into the assembly, high requirements are imposed on this position. Coupled with the relatively large outer dimension of the part itself, if the processing scheme is not properly selected during the actual processing, it will lead to non-matching of the outer dimension and position dimension of the avoidance groove, directly affecting the installation matching degree and interchangeability of the final product. Therefore, in order to ensure that the outer dimension and position dimension of the avoidance groove of the L-shaped ring can meet the assembly requirements and stabilize its consistency and interchangeability, the Figure 1 shown cutting device is used to ensure the dimensional requirements of the avoidance groove of the L-shaped ring, improve the manufacturing precision of the product, and meet the installation requirements of the final product.

[0038] As Figure 1 , Figures 3 to 5 shown, the positioning and cutting device includes a base assembly 1, a support column assembly 2, and a positioning ring assembly 3.

[0039] The base assembly 1 mainly includes a connecting bolt 11, a first connecting core shaft 12, a base 13, and a positioning disk 14. The center of the positioning disk 14 is coaxial with the laser cutting platform, which is convenient for automatically finding the reference point during laser cutting. Therefore, the base assembly 1 is an important component for ensuring the outer dimension of the avoidance groove of the part. The first connecting core shaft 12 plays a positioning role, and the connecting bolt 11 serves as a connecting piece. In order to extend the service life of the positioning and cutting device and ensure the laser cutting precision, the positioning disk 14 and the base 13 are detachably connected. When the positioning disk 14 has been used for a period of time and the coaxiality decreases due to wear and other reasons, at this time, the positioning disk 14 can be disassembled, and a new positioning disk 14 can be replaced to ensure the coaxiality. At the same time, the cost problem caused by replacing the base 13 and the positioning disk 14 simultaneously is avoided.

[0040] The support column assembly 2 mainly includes a support column 22 and a second connecting mandrel 21. The support column assembly 2 mainly functions to support and connect the positioning ring assembly 3 and the base assembly 1, and its second connecting mandrel 21 plays a positioning role.

[0041] The positioning ring assembly 3 mainly includes a positioning ring 31, a pressing plate 32, and a pressing plate bolt 33. The inner circular surface (inner ring) of the L-shaped ring is assembled with the annular protrusion on the axial end face of the positioning ring 31 to ensure the coaxiality of the L-shaped ring and the positioning ring 31. After the L-shaped ring and the positioning ring 31 are assembled, the pressing plate 32 is used to press the L-shaped ring to make it fit with the positioning ring 31, and the pressing plate bolt 33 is tightened to ensure the flatness requirement of the L-shaped ring. Therefore, the positioning ring assembly 3 is an important component for manufacturing the external dimensions of the avoidance groove.

[0042] As Figure 3 , in order to reduce the self-weight of the base assembly 1, the base 1 adopts a structure of an outer ring and an inner ring arranged concentrically and coplanarly. One end of multiple support plates is connected to the outer ring surface of the inner ring, and the other end is connected to the inner ring surface of the outer ring to fix the inner ring and the outer ring. An outer lug is provided on the outer ring surface of the outer ring to form a plane for installing the support column assembly 2.

[0043] As Figure 3 , in order to facilitate the positioning and connection of the base 13 and the support column 21, the first connecting mandrel 12 and the connecting bolt 11 are used to install the base 13 and the support column 21.

[0044] As Figure 4 and Figure 5 , in order to facilitate the connection between the support column 22 and the positioning ring 31, a second connecting mandrel 21 is provided at the upper end of the support column 22, and a connecting lug with a connecting hole is provided on the outer ring surface of the positioning ring 31.

[0045] As Figure 5 , the pressing plate 32 is installed on the annular protrusion end face through the pressing plate bolt 33. In order to facilitate the installation of the pressing plate 32 on the positioning ring 31, multiple protrusions along the radial direction of the positioning ring are provided on the inner ring surface of the positioning ring 31, increasing the installation surface of the pressing plate 32. A kidney-shaped groove is opened on the pressing plate 32 to facilitate the forward and backward movement and rotation of the pressing plate 32, thereby adjusting the pressing position of the pressing plate 32.

[0046] The steps of using the cutting device of the present utility model for positioning and cutting the external dimensions of the avoidance groove are as follows:

[0047] Step 1: Place the base assembly 1 stably on the laser cutting platform, ensure that the surface of the laser cutting platform is clean and tidy, and check that the coaxiality between the positioning disk 14 in the base assembly 1 and the laser cutting platform is not greater than 0.2 mm.

[0048] Step 2: Assemble the support column assembly 2 on the base assembly 1, and use the connecting bolt 11 and the first connecting mandrel 12 for connection.

[0049] Step 3: Assemble the positioning ring assembly 3 on the support column 22, and use three second connecting mandrels 21 for positioning and limiting.

[0050] Step 4: Assemble the L-shaped ring on the positioning ring 31, and check whether the inner circular surface of the L-shaped ring matches the outer circular surface of the annular protrusion of the positioning ring 31. If there is assembly interference, the L-shaped ring is regarded as unqualified and qualified parts need to be replaced for reassembly. After qualified assembly, use five pressure plates 32 to press the L-shaped ring.

[0051] Step 5: Turn on the laser cutting equipment, adjust the cutting program, pre-cut once before formal cutting, check that there are no other faults in the equipment, and then perform formal cutting.

[0052] Step 6: Remove the L-shaped ring, place the L-shaped ring on the inspection fixture to check the position dimension of the avoidance groove, and use a measuring tool to measure the external dimension of the avoidance groove.

[0053] By collecting and tracking data on the actual processing of the cutting device and the L-shaped ring, the use of this cutting device ensures the dimensional accuracy of the avoidance groove. The one-time installation qualification rate of the product has increased by 90%, significantly reducing the situation of secondary repair due to the mismatch of the product during installation, effectively shortening the installation cycle, improving the installation quality, and achieving good economic benefits.

Claims

1. An L-shaped ring avoidance groove external dimension positioning and cutting device, characterized in that: include, A base assembly (1), the base assembly (1) comprising a base (13) and a positioning plate (14), the positioning plate (14) being detachably connected to the center of the base (13), a positioning hole being provided at the center of the positioning plate (14), and the base assembly (1) being coaxially connected to the laser cutting platform via the positioning hole on the positioning plate (14); A support column assembly (2), wherein a first end of the support column assembly (2) is detachably connected to an end surface of a base (13), and a plurality of the support column assemblies (2) are distributed on a same circumference with the center of the positioning hole of the positioning plate (14) as the center; A positioning ring assembly (3) is detachably connected to the second end of the support column assembly (2); an annular protrusion is coaxially arranged on one end face of the positioning ring assembly (3); the outer ring diameter of the annular protrusion is equal to the inner ring diameter of the L-shaped ring; and a plurality of pressure plates (32) are arranged on the end face of the annular protrusion, so that a compression limiting space of the L-shaped ring is formed between the end face of the positioning ring assembly (3), the outer ring surface of the annular protrusion and the pressure plate (32).

2. The L-shaped ring avoidance groove outer dimension positioning and cutting device according to claim 1, characterized in that: A first connecting core shaft (12) and a threaded hole are also provided on the end surface of the base (13); the first end of the support column assembly (2) is positioned with the base (13) by the first connecting core shaft (12) and connected with the threaded hole of the base (13) by a connecting bolt (11).

3. The L-shaped ring avoidance groove dimension positioning and cutting device according to claim 1, characterized in that: The base (13) comprises: The outer ring and the inner ring are arranged concentrically and coplanarly; Support plates, one end of the plurality of support plates is connected to the outer ring surface of the inner ring, and the other end is connected to the inner ring surface of the outer ring; The outer lug is arranged on the outer ring surface of the outer ring to form a plane for mounting the support column assembly (2).

4. The L-shaped ring avoidance groove external dimension positioning and cutting device according to claim 1, characterized in that: The second end of the support column assembly (2) is provided with a second connecting core shaft (21).

5. The L-shaped ring avoidance groove dimension positioning and cutting device according to claim 1, characterized in that: The positioning ring assembly (3) comprises a positioning ring (31), which is an annular member having a plurality of connecting lugs arranged on its outer ring surface and connected to the second end of the support column assembly (2) via through holes on the connecting lugs.

6. The L-shaped ring avoidance groove dimension positioning and cutting device according to claim 1, characterized in that: The pressure plate (32) is detachably connected to the annular protrusion via a pressure plate bolt (33).

7. The L-shaped ring avoidance groove dimension positioning and cutting device according to claim 5, characterized in that: The inner ring surface of the positioning ring (31) is provided with a plurality of protrusions along the radial direction of the positioning ring (31), and the protrusions serve as installation positions of the pressure plate (32).

8. The L-shaped ring avoidance groove dimension positioning and cutting device according to claim 1, characterized in that: The number of the pressing plates (32) is one more than the number of the L-shaped ring avoidance grooves, and the area between any two adjacent pressing plates (32) serves as the avoidance groove cutting area.

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