A cambered surface part machining tooling

Abstract

The utility model relates to mechanical processing frock technical field, concretely relates to a kind of cambered surface class parts processing frock, comprising: mounting plate, one end of the mounting plate is equipped with assembly head, the other end of the mounting plate is equipped with assembly tail, the mounting plate positive and negative both sides can be assembled cambered surface parts.The positioning groove is set on the mounting plate positive and negative both sides, the horizontal bottom surface of the cambered surface part is equipped with positioning protrusion, the positioning protrusion is compatible with the positioning groove, when assembling, the protrusion of the horizontal bottom surface of the cambered surface part is inserted into the positioning groove, to accurately position the cambered surface part.The dismounting groove is also set on the circumferential side of the positioning groove, and the size of the dismounting groove is smaller than the size of the positioning groove.Therefore, a kind of cambered surface class parts processing frock is designed to solve the problem of low processing efficiency and unstable processing cambered surface quality in the prior art of half-moon cambered surface part using CNC milling machine.

Description

Technical Field

[0001] This utility model relates to the field of machining tooling technology, and in particular to a machining tooling for curved surface parts. Background Technology

[0002] In the field of machining tooling, CNC milling machines are often used to manufacture some crescent-shaped arc-shaped parts. To ensure the stability of the part during machining, the crescent needs to be mounted on a graphite stage and its perimeter is glued with hot melt adhesive, and then fixed with a pressure plate. Next, the CNC milling machine uses a bullnose end mill to machine the crescent-shaped arc surface according to a preset 3D toolpath.

[0003] However, this CNC milling method has many drawbacks. First, the toolpath step distance is usually small, resulting in a long machining cycle. Second, CNC milling can only process one half-moon shaped part at a time, resulting in low machining efficiency. More importantly, due to the small diameter of the milling cutter, the milling cutter linear speed is low, which easily causes obvious machining marks on the surface of the part, failing to meet surface quality requirements. Usually, it is necessary to use sandpaper to grind the surface of the part afterward, which not only increases the machining cost but also extends the production cycle.

[0004] Therefore, a machining fixture for curved surface parts is designed to solve the problems of low machining efficiency and unstable machining quality of crescent-shaped curved surface parts when using CNC milling machines. Utility Model Content

[0005] The purpose of this invention is to provide a machining fixture for curved surface parts, so as to solve the problems of low machining efficiency and unstable machining quality of crescent-shaped curved surface parts when using CNC milling machines in the prior art.

[0006] The technical solution of this utility model is: a tooling for processing arc-shaped parts, including: a mounting plate, one end of which is provided with an assembly head and the other end of which is provided with an assembly tail, and arc-shaped parts can be assembled on both sides of the mounting plate.

[0007] Preferably, the mounting plate has positioning grooves on both the front and back sides, and the horizontal bottom surface of the arc-shaped part has positioning protrusions that are adapted to the positioning grooves. During assembly, the protrusions on the horizontal bottom surface of the arc-shaped part are inserted into the positioning grooves to accurately position the arc-shaped part.

[0008] Preferably, a disassembly groove is also provided on the periphery of the positioning groove. The size of the disassembly groove is smaller than that of the positioning groove. When the arc-shaped part is assembled, a disassembly gap is formed between the disassembly groove and the arc-shaped part. During disassembly, a disassembly tool is inserted into the disassembly groove to apply a push-out force to the arc-shaped part to achieve rapid disassembly.

[0009] Preferably, the positioning groove is provided with an assembly hole, which is located outside the positioning groove. The assembly hole is used to insert a fastener to fix the arc-shaped part in the positioning groove.

[0010] Preferably, one or more of the arc-shaped parts can be assembled in the positioning groove.

[0011] Preferably, when one or more arc-shaped parts with a thickness shorter than the length of the positioning groove are assembled in the positioning groove, a limiting element is provided in the positioning groove to axially limit the arc-shaped parts, and fasteners are used to pass through the assembly hole to fix them.

[0012] Preferably, the assembly head is a cylindrical structure used for positioning in conjunction with the spindle of the processing equipment.

[0013] Preferably, the assembly tail section has a central hole for clamping with the tailstock tip of the processing equipment.

[0014] Compared with the prior art, the advantages of this utility model are: (1) By setting up a mounting plate that can assemble arc-shaped parts on both sides, two arc-shaped parts are fixedly installed on their respective sides. After assembly, the outer contours of the two arc-shaped parts are combined to form a complete circle. Then, the surface of the arc-shaped parts is processed by turning. Turning is used to replace the traditional CNC milling machine. At the same time, two sets of arc-shaped parts are processed at one time, which greatly improves the processing efficiency. Meanwhile, the cutting trajectory of turning is continuous and stable, which effectively improves the surface quality of the arc-shaped parts. (2) By setting a positioning groove that matches the positioning protrusion on the horizontal bottom surface of the arc surface part, the precise positioning of the arc surface part is realized, ensuring the stability of the part during the processing, thereby improving the machining accuracy and consistency of the arc surface. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the machining fixture for the arc-shaped parts described in this utility model; Figure 2 This is a schematic diagram of the first assembly method of the machining fixture for arc-shaped parts according to this utility model; Figure 3This is a sectional view of the machining fixture for the arc-shaped parts described in this utility model; Figure 4 This utility model Figure 2 Enlarged view of region A in the middle; Figure 5 This is a schematic diagram of the second assembly method of the machining fixture for arc-shaped parts according to this utility model; Figure 6 This is a schematic diagram of the third assembly method for the machining fixture for arc-shaped parts described in this utility model; The components include: 1. Mounting plate; 11. Positioning groove; 111. Disassembly groove; 12. Assembly hole; 2. Assembly head; 3. Assembly tail; 31. Center hole; 4. Curved surface part; 5. Limiting element. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1 to 6 As shown, a machining fixture for curved surfaces includes a mounting plate 1. One end of the mounting plate 1 has an assembly head 2, and the other end has an assembly tail 3. Curved surfaces 4 can be mounted on both sides of the mounting plate 1. Two curved surfaces 4 are fixedly mounted to the front and back sides of the mounting plate 1, respectively. After assembly, the outer contours of the two curved surfaces 4 combine to form a complete circle, allowing the surface of the curved surfaces 4 to be machined using machining equipment. The mounting plate 1 is made of bakelite material, which possesses high mechanical strength, good insulation, excellent heat resistance, and corrosion resistance. It is not easily deformed during high-speed turning, thus ensuring machining accuracy.

[0017] Positioning grooves 11 are provided on both the front and back of the mounting plate 1. Positioning protrusions are provided on the horizontal bottom surface of the arc-shaped part 4. The positioning protrusions are adapted to the positioning grooves 11. During assembly, the protrusions on the horizontal bottom surface of the arc-shaped part 4 are inserted into the positioning grooves 11 to ensure that the horizontal bottom surface of the arc-shaped part 4 is in contact with the mounting plate 1, thereby accurately positioning the arc-shaped part 4.

[0018] The positioning groove 11 is also provided with a disassembly groove 111 on its periphery. The size of the disassembly groove 111 is smaller than that of the positioning groove 11. When the curved part 4 is assembled, a disassembly gap is formed between the disassembly groove 111 and the curved part 4. The disassembly tool can be a flathead screwdriver or a special ejector pin. By inserting it into the disassembly groove 111 and applying an upward pushing force, the curved part 4 can be quickly separated from the positioning groove 11.

[0019] The positioning groove 11 has an assembly hole 12 located outside the positioning groove 11. The assembly hole 12 is used to insert a fastener to fix the arc-shaped part 4 inside the positioning groove 11. The fastener can be a screw, nut, or pressure plate, which works with the assembly hole 12 to press the arc-shaped part 4 into place.

[0020] One or more curved parts 4 can be assembled in the positioning groove 11.

[0021] When one or more curved parts 4 with a thickness shorter than the length of the positioning groove 11 are assembled in the positioning groove 11, a limiting element 5 is provided in the positioning groove 11 to axially limit the curved parts 4, and to fix them by fasteners passing through the assembly holes 12. The limiting element 5 can be a telescopic rod structure with a spring or threaded adjustment mechanism inside, which can realize length adjustment and locking. Its two ends abut against the side wall of the positioning groove 11 and the end face of the curved parts 4, respectively, thereby realizing axial limiting.

[0022] The assembly head 2 is a cylindrical structure used for positioning and mating with the spindle of the machining equipment. The assembly head 2 is inserted into the spindle positioning element (such as a triangular chuck) of the machining equipment (lathe) to ensure that the tooling is coaxial with the spindle, thereby enabling turning operations.

[0023] The assembly tail section 3 has a central hole 31 for mating with the tailstock center of the machining equipment (lathe) for clamping.

[0024] Working principle: First, inspect and clean the raised surfaces of the positioning groove 11 and the horizontal bottom surface of the curved part 4 to ensure they are clean. Then, install the two curved parts 4 into the upper and lower positioning grooves 11 respectively. At this time, determine the number of curved parts 4 to be clamped according to actual needs. When the thickness of the clamped curved parts 4 is shorter than the length of the positioning groove 11, the curved parts 4 are axially limited by the limiting element 5 and fixed by fasteners passing through the assembly holes 12.

[0025] Next, insert the assembly head 2 of this tooling into the spindle positioning hole of the machining equipment, align the tailstock tip with the center hole 31 of the assembly tail 3, and tighten it to complete the overall clamping of the tooling. Start the machining equipment to perform turning. Specifically, the spindle drives the tooling to rotate, and at the same time the tool performs machining on the arc-shaped part 4 along the preset path.

[0026] Finally, after processing is completed, stop the equipment, remove the fixture, and then use a disassembly tool to insert into the disassembly slot 111 to apply an ejection force to the curved part 4 and remove the curved part 4 from the fixture.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A machining fixture for arc-shaped parts, characterized in that: It includes a mounting plate (1), one end of which is provided with an assembly head (2) and the other end of which is provided with an assembly tail (3). Arc-shaped parts (4) can be assembled on both sides of the mounting plate (1).

2. The machining fixture for arc-shaped parts according to claim 1, characterized in that: The mounting plate (1) has positioning grooves (11) on both the front and back sides. The horizontal bottom surface of the arc-shaped part (4) has a positioning protrusion. The positioning protrusion is adapted to the positioning groove (11). During assembly, the protrusion on the horizontal bottom surface of the arc-shaped part (4) is inserted into the positioning groove (11) to accurately position the arc-shaped part (4).

3. The machining fixture for arc-shaped parts according to claim 2, characterized in that: The positioning groove (11) is also provided with a disassembly groove (111) on its periphery. The size of the disassembly groove (111) is smaller than that of the positioning groove (11). When the arc-shaped part (4) is assembled, a disassembly gap is formed between the disassembly groove (111) and the arc-shaped part (4). During disassembly, a disassembly tool is inserted into the disassembly groove (111) to apply a push-out force to the arc-shaped part (4) to achieve rapid disassembly.

4. The machining fixture for arc-shaped parts according to claim 3, characterized in that: The positioning groove (11) is provided with an assembly hole (12), which is located outside the positioning groove (11). The assembly hole (12) is used to insert fasteners to fix the arc-shaped part (4) in the positioning groove (11).

5. The machining fixture for arc-shaped parts according to claim 4, characterized in that: One or more of the arc-shaped parts (4) can be assembled in the positioning groove (11).

6. The machining fixture for arc-shaped parts according to claim 5, characterized in that: When one or more arc-shaped parts (4) with a thickness shorter than the length of the positioning groove (11) are assembled in the positioning groove (11), a limiting element (5) is set in the positioning groove (11) to limit the arc-shaped parts (4) axially, and to fix them by fasteners passing through the assembly hole (12).

7. The machining fixture for arc-shaped parts according to claim 1, characterized in that: The assembly head (2) is a cylindrical structure used for positioning in conjunction with the spindle of the processing equipment.

8. The machining fixture for arc-shaped parts according to claim 7, characterized in that: The assembly tail section (3) has a central hole (31) for clamping with the tailstock tip of the processing equipment.

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