Machining device for guide fillet of sealing structure

Abstract

The utility model discloses a machining device for a guide fillet of a sealing structure, which comprises a grinding head, abrasive paper and a positioning shaft, and the grinding head is provided with a positioning cylinder and a rotary grinding surface which is formed by taking an inner concave arc R as a contour edge and taking the axis of the grinding head as a rotating shaft. Before a guide fillet is machined, abrasive paper is marked along the contour of a cutting sample plate and cut, then the abrasive paper is pasted to a grinding head through glue, a positioning shaft is inserted into a pipe joint, the grinding head is clamped through a handheld electric drill, a positioning cylinder is inserted into a positioning round hole of the positioning shaft, and the grinding head is pressed to a to-be-machined position for grinding; and finally, metallographic abrasive paper is used for polishing the ground round corner, and alcohol is used for cleaning the ground round corner. By adopting the guide fillet processing device, the problems of difficult repair and low repair qualification rate caused by missing processing of the guide fillet can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of bench work processing, and particularly relates to a machining device for guide fillets in pipe joint sealing structures. BACKGROUND

[0002] As shown in Figure 9 Fig. 1, it is a pipe joint, one end of the pipe joint has a sealing structure guide fillet (D position in Figure 9 ), the inner wall of the pipe joint has an internal thread, the sealing structure guide fillet is an important sealing structure component in the assembly of the sealing ring of this type of sealing structure and the use process of the product, and the pipe joint part is welded or assembled to other components to form a final product.

[0003] However, due to differences in conditions during actual sealing ring assembly or reasons such as missing or incorrect machining of the guide fillet on the pipe joint, it is often necessary to temporarily supplement the machining (finishing) of the guide fillet at the assembly site, but since the pipe joint has been installed on the final product (such as a heat exchanger or fuel oil tank), the overall structure of the final product is different, either it is not convenient to clamp the equipment, or it is difficult to find the center of the guide fillet on the machining equipment after clamping, which makes it impossible to use machining equipment to process the guide fillet.

[0004] The current solution is to use tools on site by a bench worker. However, the round corners obtained by the bench worker using conventional tools are not only inconsistent in size at different positions on the circumference, but also difficult to ensure that the final shape is a round corner, and are very easy to process into a chamfer, resulting in the sealing of the final product not meeting the requirements.

[0005] Based on the above status, the current sealing structure guide fillet usually has the following three problems during supplementary machining:

[0006] 1. The final product is not convenient to clamp;

[0007] 2. It is difficult to find the center of the guide fillet on the machining equipment;

[0008] 3. The guide fillet obtained by the bench worker using the traditional machining method is inconsistent in size and is easy to process into a chamfer.

[0009] In summary, the supplementary machining method of the existing sealing structure guide fillet has many defects, resulting in difficult machining of the guide fillet and low machining qualification rate. SUMMARY

[0010] In view of the problems in the background art, the utility model aims to provide a machining device for a sealing structure guide fillet to solve the problems of difficult machining and low rework qualification rate when supplementally machining the guide fillet as part of the sealing structure in the existing pipe joint.

[0011] In order to achieve the above object, the utility model adopts the following technical scheme:

[0012] A kind of processing device of sealing structure guide fillet, comprising:

[0013] Grinding head, the grinding head includes a section with inner concave arc R as profile edge, with the axis of grinding head as the axis of rotation formed rotary grinding surface, the axial end of grinding head also has a positioning cylinder, positioning cylinder is coaxial with the axis of grinding head, and the outer diameter of positioning cylinder is less than the outer diameter of the axial end surface;

[0014] Sandpaper, the sandpaper is pasted on rotary grinding surface;

[0015] Positioning shaft, the positioning shaft is cylindrical, and a positioning circular hole is opened on one axial end surface of the positioning shaft, the inner diameter of positioning circular hole is equal to the outer diameter of positioning cylinder, and the outer surface of positioning shaft has a section of external thread matched with the internal thread of pipe joint.

[0016] Further, the grinding head further includes a clamping rod connected with the hand electric drill chuck.

[0017] Further, the shape of the sandpaper is consistent with the shape after the rotary grinding surface is unfolded into a plane.

[0018] Further, the positioning shaft further includes a pair of sockets, and the pair of sockets are distributed on the axial end surface where the positioning circular hole is located and located on the radial line of the positioning circular hole.

[0019] As an option,

[0020] The material of the grinding head is bakelite rod;

[0021] The material of the positioning shaft is 1Cr18Ni9Ti.

[0022] Compared with prior art, the utility model provides a kind of processing device of sealing structure guide fillet, fundamentally solves the problems, such as difficult processing, rework qualified rate low, when guide fillet supplementary processing in pipe joint sealing structure.

[0023] The type of sandpaper is selected according to the surface roughness requirement of guide fillet, and then installed on the grinding head by pasting, suitable for different technical requirements.

[0024] The machining device of the utility model realizes positioning through the cooperation of the outer thread on the positioning shaft and the inner thread of the pipe joint, realizes the centering of the center of the guide round corner through the gap cooperation of the positioning round hole on the positioning shaft and the positioning cylinder on the grinding head, is convenient for subsequent grinding of the guide round corner, thereby the centering of the center of the guide round corner is solved, further, the guide round corner of the pipe joint is individually centered after the final product is clamped as a whole on the machine tool equipment without needing to clamp the final product as a whole on the machine tool equipment.

[0025] After the machining device of the utility model is used, the final product is not needed to be clamped as a whole on the machine tool equipment by using special tooling, and only needs to be stably placed on the workbench by hand. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the sandpaper cutting sample board schematic view;

[0027] Figure 2 It is the grinding head schematic view;

[0028] Figure 3 It is the appearance of the grinding head after the sandpaper is pasted on the rotary grinding surface;

[0029] Figure 4 It is the handle schematic view for installing the positioning shaft;

[0030] Figure 5 It is the positioning shaft schematic view;

[0031] Figure 6 It is the positioning shaft and pipe joint assembly schematic view;

[0032] Figure 7 It is the state diagram of the grinding head for grinding the guide round corner;

[0033] Figure 8 It is Figure 7 The local enlarged view of the guide round corner in the;

[0034] Figure 9 It is the pipe joint guide round corner position diagram;

[0035] In the drawing: 1-sandpaper cutting sample board;2-grinding head;21-positioning cylinder;3-sandpaper;4-positioning shaft;41-outer thread;42-plug;5-handle. DETAILED DESCRIPTION

[0036] The utility model will be further described below in combination with the drawings and specific embodiments, but should not be understood as the scope of the utility model described subject is limited to the following examples, without departing from the above technical ideas of the utility model, all kinds of modifications, substitutions and changes made according to the ordinary technical knowledge and conventional means, are included within the scope of the utility model.

[0037] On the one hand, considering that the on-site finishing supplementary processing of the guide fillet of the sealing structure is limited in processing method due to its assembly to different structure products, it is inconvenient to use machining equipment to process the separate guide fillet. On the other hand, the guide fillet obtained by using the traditional benchwork processing method is inconsistent in size at each position on the circumference, and it is difficult to ensure that it is a fillet, and it is easy to be processed into a chamfer, resulting in problems such as difficult processing, low repair qualification rate, etc. during the supplementary processing of the guide fillet of the sealing structure.

[0038] As shown in Figures 1-8 The utility model discloses a processing device for guide fillet of sealing structure, including sandpaper cutting template 1, grinding head 2, sandpaper 3, positioning shaft 4 and handle 5. Sandpaper cutting template 1 is used to mark sandpaper 3, and sandpaper cutting template 1 is the shape of the plane after the rotary grinding surface is developed. Grinding head 2 includes a rotary grinding surface formed by taking the inner concave arc R as the contour edge and taking the axis of grinding head 2 as the pivot, and the axial end of grinding head 2 also has a positioning cylinder 21, the positioning cylinder 21 is coaxial with the axis of grinding head 2, and the outer diameter of the positioning cylinder 21 is less than the outer diameter of the axial end surface, and grinding head 2 also includes a clamping rod connected with the chuck of the electric drill. Sandpaper 3 is pasted on the rotary grinding surface, and the shape of sandpaper 3 is consistent with the shape of the plane after the rotary grinding surface is developed. Positioning shaft 4 is a cylinder, and a positioning circular hole is formed in one axial end surface of positioning shaft 4, and the outer surface of positioning shaft 4 has a section of external thread 41 matched with the internal thread of the pipe joint, and positioning shaft 4 also includes a pair of sockets 42, and the pair of sockets 42 are distributed on the axial end surface where the positioning circular hole is located and located on the radial line of the positioning circular hole. Handle 5 includes a head part in the shape of a Chinese character, which is used to insert the pair of sockets 42, so as to drive positioning shaft 4 into the pipe joint by rotating handle 5 and realize threaded connection.

[0039] In this embodiment, the material of sandpaper cutting template 1 is 1Cr18Ni9Ti, the thickness is 1mm, the inner circle diameter is Φ36mm, the outer circle diameter is Φ67.4mm, the length of the inner circle contour cutting line (C position in the figure) is 97mm, and the length of the outer circle contour cutting line (D position in the figure) is 97mm. Figure 1 Figure 1 ​The length of the grinding head 2 (position B) is 157mm. The material of the grinding head 2 is bakelite rod. The concave arc R corresponding to the rotating arc surface is R10 (mm). The outer diameter of the positioning cylinder 21 is 18mm. The material of the positioning shaft 4 is 1Cr18Ni9Ti, and the height is 78mm. The external thread 41 is M33X1.5-6g. The diameter of the positioning hole is 18mm. The groove depth of the insertion port 42 is 10mm, and the width is 3.2mm. The material of the handle 5 is 1Cr18Ni9Ti, the thickness is 3mm, the length is 25mm, and the head height at the assembly point with the positioning shaft 4 is 20mm.

[0040] Before machining the guide rounded corners, first cut sandpaper 3. Mark the sandpaper 3 along the outline of the sandpaper cutting template 1, and then cut according to the marked lines, such as... Figure 1 Attach sandpaper 3. Use glue to attach the cut sandpaper 3 to the rotary grinding surface of the grinding head 2, and let it air dry for 10 minutes. Figure 3 Use handle 5 to assemble positioning shaft 4 into the pipe fitting. The positioning shaft 4 is locked in place within the pipe fitting by its external thread 41 and height limit. Figures 4-6 To facilitate operation, the pipe fitting is tilted so that it is in a horizontal or vertical position relative to the work platform on which the final product is placed. Holding the electric drill, clamp the clamping rod of the grinding head 2, and press the rotating grinding surface of the grinding head 2 against the guide radius of the pipe fitting to be processed. Figure 7 By relying on the positioning cylinder 21 at the end of the grinding head 2 to cooperate with the positioning hole of the positioning shaft 4, the grinding head 2 is ensured to be coaxial with the pipe joint to be processed, and the area to be processed ( Figure 9 Grind the center (D position) until the required guide radius is achieved, such as... Figure 8 and Figure 9 The coaxiality of the grinding head 2 and the guide rounded corner to be ground is ensured by the positioning shaft 4. After grinding, the original sharp corner is processed into a rounded corner. Finally, the ground guide rounded corner is polished with metallographic sandpaper, and then the positioning shaft 4 is removed through the handle 5 and the surface of the guide rounded corner is cleaned with alcohol.

[0041] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A processing apparatus for guiding a fillet of a seal structure, characterized by, The utility model relates to a grinding head (2) comprising a rotary grinding surface profiled with an inner concave circular arc R and formed with the axis of the grinding head (2) as the rotation axis, and a positioning cylinder (21) at the axial end of the grinding head (2), the positioning cylinder (21) being coaxial with the axis of the grinding head (2) and having an outer diameter smaller than that of the axial end surface of the grinding head (2). A sandpaper (3) is attached to the rotary grinding surface. A positioning shaft (4) is a cylinder, and a positioning circular hole is formed in one axial end surface of the positioning shaft (4), the inner diameter of the positioning circular hole being equal to the outer diameter of the positioning cylinder (21), and the outer surface of the positioning shaft (4) has a section of external thread (41) matching the internal thread of the pipe joint. The grinding head (2) further comprises a clamping rod connected to the chuck of the electric drill.

2. The apparatus of claim 1, wherein: The shape of the sandpaper (3) is consistent with that of the rotary grinding surface when unfolded into a plane.

3. The apparatus of claim 1, wherein: The positioning shaft (4) further comprises a pair of sockets (42) distributed on the axial end surface where the positioning circular hole is located and located on the radial line of the positioning circular hole.

4. The apparatus of claim 1, wherein: ​

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