A machining fixture for a window cover part

Abstract

This application relates to the field of fixture technology, and particularly to a machining fixture for window cover parts, comprising: a base plate; a liner plate fixed to the base plate, the top of which has a horizontal surface; a clamping assembly disposed on the base plate and distributed around the liner plate; and a positioning sleeve connected to the base plate via an elastic assembly, the liner plate having a mounting groove, the positioning sleeve being located within the mounting groove, and the interior of the positioning sleeve having a tapered hole extending perpendicular to the horizontal plane. By using an elastic floating positioning sleeve in conjunction with a coarse datum for positioning, the positioning problem caused by individual differences in the workpiece's coarse datum is solved. It can adaptively compensate for the dimensional and positional tolerances of each workpiece's tapered cylinder, ensuring that each workpiece's tapered cylinder is always in contact with the tapered hole of the positioning sleeve, eliminating the need for tedious fine-tuning operations by workers, significantly shortening the auxiliary time for workpiece clamping and positioning, and greatly improving production efficiency.

Description

Technical Field

[0001] This application relates to the field of fixture technology, and in particular to a machining fixture for window cover parts. Background Technology

[0002] for Figure 5 The irregularly shaped window cover part shown requires a raised conical cylinder as a rough reference for positioning during machining. However, the rough reference has slight differences between each workpiece. Currently, there is no special fixture for clamping and positioning such workpieces. In practice, workers usually use existing fixtures in combination, which is unreliable. Furthermore, the positioning process often requires fine adjustments based on the differences in the rough reference of different workpieces, resulting in a significant time cost for various clamping processes in the early stages of workpiece machining. Summary of the Invention

[0003] This application aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a machining fixture for window cover parts, eliminating the need for tedious fine-tuning operations by workers, significantly shortening workpiece clamping time, and improving production efficiency.

[0004] A machining fixture for a window cover part, comprising: Base plate; A liner plate is fixed to the base plate, and a horizontal surface is provided on the top of the liner plate, which is used to fit the bottom plane of the window cover part; A clamping assembly is disposed on the base plate and distributed around the liner, the clamping assembly being used to clamp the window cover parts onto the liner; A positioning sleeve is connected to the base plate via an elastic component. The liner is provided with a mounting groove, and the positioning sleeve is located in the mounting groove. The interior of the positioning sleeve has a tapered hole extending in a direction perpendicular to the horizontal plane. The tapered hole is used to mate with the tapered cylinder of the window cover part.

[0005] In an optional or preferred embodiment, a guide sleeve is further included, which is fixed on the base plate and located in the mounting groove. A positioning sleeve is slidably assembled in the guide sleeve and is axially movable relative to the guide sleeve.

[0006] In an optional or preferred embodiment, the end face of the positioning sleeve near the base plate is provided with a plurality of axially extending mounting holes, the mounting holes being distributed circumferentially at intervals. The elastic component includes a plurality of columnar springs, the number of which is the same as the number of mounting holes. Each mounting hole is provided with one columnar spring, one end of which is fitted into the mounting hole and the other end is connected to the base plate.

[0007] In an optional or preferred embodiment, three mounting holes and three columnar springs are provided.

[0008] In an optional or preferred embodiment, the sidewall of the positioning sleeve is provided with an axially extending strip hole that penetrates the sidewall of the positioning sleeve, and the side of the guide sleeve is provided with a circular hole that penetrates the sidewall of the guide sleeve. The circular hole is aligned with the strip hole, and a limiting pin passes through the strip hole and the circular hole.

[0009] In an optional or preferred embodiment, the clamping assembly includes a pressure plate, a fixed shaft, a double-ended screw, and a nut. One end of the pressure plate is connected to the base plate via the fixed shaft, and the other end of the pressure plate has a forked structure. One end of the double-ended screw is threaded to the base plate, and the other end passes through the forked structure and is fitted with the nut. The forked end of the pressure plate is used to press against the window cover part.

[0010] In an optional or preferred embodiment, the pressure plate is provided with an opening groove, which divides the pressure plate into a forked structure, and the double-headed screw is engaged at the root of the opening groove.

[0011] In an optional or preferred embodiment, a counterweight is provided on the base plate so that the center of mass of the overall fixture coincides with its geometric center.

[0012] In an optional or preferred embodiment, the mounting groove is a U-shaped open groove structure.

[0013] In an optional or preferred embodiment, the liner is provided with a countersunk hole, the base plate is provided with a threaded hole, the countersunk hole is aligned with the threaded hole, and a connecting bolt is provided in the countersunk hole and the threaded hole to fix the liner to the base plate.

[0014] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: When the tapered cylinder of the workpiece enters the tapered hole of the positioning sleeve, as the workpiece continues to be pressed down, the positioning sleeve can move slightly downward along the axis through the elastic component, and the tapered hole itself has a guiding taper, so the inner wall of the tapered hole will guide the tapered cylinder to automatically center. Since the positioning sleeve can float, the tapered cylinder of the workpiece and the tapered hole of the positioning sleeve are always in contact, thereby completing the positioning. This method of positioning by using an elastic floating positioning sleeve in conjunction with a coarse datum solves the positioning problem caused by individual differences in the coarse datum of the workpiece. It can adaptively compensate for the size and position tolerances of each workpiece tapered cylinder, ensuring that each workpiece tapered cylinder and the tapered hole of the positioning sleeve are always in contact, eliminating the need for tedious fine-tuning operations by workers, significantly shortening the auxiliary time for workpiece clamping and positioning, and greatly improving production efficiency. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the structure of the workpiece being clamped on the machining fixture of the window cover part of this application; Figure 2 This is a schematic diagram of the structure of a machining fixture for a window cover part provided in one embodiment of this application; Figure 3 yes Figure 2 Partial structural diagram; Figure 4 yes Figure 2 A cross-sectional view; Figure 5 This is a structural schematic diagram of the window cover part of this application.

[0016] Figure label: 100. Base plate; 200. Liner plate; 210. Horizontal plane; 220. Countersunk hole; 300. Clamping assembly; 310. Pressure plate; 311. Opening slot; 312. Clamping arm; 320. Fixed shaft; 330. Double-ended screw; 400. Positioning sleeve; 410. Tapered hole; 420. Strip hole; 510. Columnar spring; 600. Guide sleeve; 610. Round hole; 620. Limiting pin; 700. Counterweight; 800. Window cover part; 810. Bottom plane; 820. Tapered cylinder. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] for Figure 5 The irregularly shaped window cover part shown requires a raised conical cylinder as a rough reference for positioning during machining. However, the rough reference has slight differences between each workpiece. Currently, there is no special fixture for clamping and positioning such workpieces. In practice, workers usually use existing fixtures in combination, which is unreliable. Furthermore, the positioning process often requires fine adjustments based on the differences in the rough reference of different workpieces, resulting in a significant time cost for various clamping processes in the early stages of workpiece machining.

[0024] Reference Figures 1 to 5 This application provides a machining fixture for a window cover part, including a base plate 100, a liner plate 200, a clamping assembly 300, and a positioning sleeve 400.

[0025] The base plate 100 serves as the base for the entire fixture. The liner 200 is fixed on the base plate 100. A horizontal surface 210 is provided on the top of the liner 200. This horizontal surface 210 is used to fit against the bottom plane 810 of the window cover part 800 during operation, thereby providing a stable support surface for the workpiece.

[0026] In some embodiments, the liner 200 is fixed to the base plate 100 by a plurality of connecting bolts. Specifically, the liner 200 is provided with countersunk holes 220, and the base plate 100 is provided with threaded holes at corresponding positions. The countersunk holes 220 are aligned with the threaded holes, and the connecting bolts pass through the countersunk holes 220 and are screwed into the threaded holes, thereby locking the liner 200 onto the base plate 100.

[0027] The clamping components 300 are distributed around the liner 200. The clamping components 300 are used to press the workpiece firmly against the horizontal surface 210 of the liner 200 after it has been placed on the liner 200. This application does not limit the specific number or distribution of the clamping components 300. Those skilled in the art can arrange two, three, or more clamping components 300 around the liner 200 on the base plate 100 according to the specific dimensions of the workpiece and the processing stress conditions.

[0028] In some embodiments, the clamping assembly 300 includes a pressure plate 310, a fixed shaft 320, a double-ended screw 330, and a nut. The top end of the fixed shaft 320 is fixedly connected to the pressure plate 310.

[0029] The end of the pressure plate 310 furthest from the fixed shaft 320 has a forked structure, meaning that an opening slot 311 is provided at this end of the pressure plate 310, dividing the end of the pressure plate 310 into two opposing clamping arms 312. The bottom end of the double-ended screw 330 is threaded to the base plate 100, and the top end of the double-ended screw 330 passes through the opening slot 311 at the end of the pressure plate 310 and is fitted with a nut. When it is necessary to clamp the workpiece with the pressure plate 310, the double-ended screw 330 is engaged at the root of the opening slot 311, and the nut is tightened. The nut presses the pressure plate 310 downwards, thereby pressing the bottom end of the fixed shaft 320 against the base plate 100. The two clamping arms 312 of the pressure plate 310 stably clamp the workpiece onto the liner 200. That is, the clamping assembly 300 is used when it is necessary to clamp the workpiece, and is placed around when not in use.

[0030] The positioning sleeve 400 is connected to the base plate 100 via an elastic component. A mounting groove is provided on the liner 200, and the positioning sleeve 400 is located within the mounting groove. The interior of the positioning sleeve 400 has a tapered hole 410 extending in a direction perpendicular to the horizontal plane 210. The shape and size of the tapered hole 410 are adapted to the outer wall shape of the tapered cylinder 820 of the window cover part 800. When clamping the workpiece, the tapered cylinder 820 of the workpiece extends downwards into the tapered hole 410 of the positioning sleeve 400. The inner wall of the tapered hole 410 and the outer wall of the tapered cylinder 820 cooperate with each other to achieve coarse datum positioning of the workpiece.

[0031] The positioning sleeve 400 in this application is connected to the base plate 100 through an elastic component. The positioning sleeve 400 can have a certain floating stroke along the axial direction of the tapered hole 410 under the support of the elastic component.

[0032] When the tapered cylinder 820 (coarse reference) of the workpiece enters the tapered hole 410 of the positioning sleeve 400, as the workpiece continues to be pressed down, the positioning sleeve 400 can move slightly downward along the axial direction through the elastic component, and the tapered hole 410 itself has a guide taper. The inner wall of the tapered hole 410 will guide the tapered cylinder 820 to automatically center. Since the positioning sleeve 400 can float, the tapered cylinder 820 of the workpiece and the tapered hole 410 of the positioning sleeve 400 are always in contact, thus completing the positioning.

[0033] This positioning method, which uses an elastic floating positioning sleeve 400 in conjunction with a coarse datum, solves the positioning problem caused by individual differences in the coarse datum of the workpiece. It can adaptively compensate for the dimensional and positional tolerances of the tapered cylinder 820 of each workpiece, ensuring that the tapered cylinder 820 of each workpiece is always in contact with the tapered hole 410 of the positioning sleeve 400. This eliminates the need for tedious fine-tuning operations by workers, significantly shortens the auxiliary time for workpiece clamping and positioning, and greatly improves production efficiency.

[0034] In some examples, the machining fixture also includes a guide sleeve 600. The guide sleeve 600 is fixed to the base plate 100 and located within a mounting groove of the liner 200. A locating sleeve 400 is slidably fitted within the guide sleeve 600 and is axially movable relative to the guide sleeve 600.

[0035] The guide sleeve 600 provides precise guidance for the floating of the positioning sleeve 400, ensuring the directionality and repeatability of the positioning sleeve 400 during axial reciprocating motion, without tilting or swaying.

[0036] In some examples, the end face of the positioning sleeve 400 near the base plate 100 (i.e., the lower end) has multiple axially extending mounting holes. These mounting holes are circumferentially spaced around the central axis of the positioning sleeve 400. The elastic component includes multiple columnar springs 510, the number of which corresponds to the number of mounting holes. Each mounting hole contains one columnar spring 510. One end of the columnar spring 510 is fitted into the mounting hole, and the other end is connected to the upper surface of the base plate 100.

[0037] As an example, the number of mounting holes and column springs 510 are both set to three. The three springs are evenly distributed in a 120-degree circumferential direction.

[0038] To limit the floating stroke of the positioning sleeve 400 and prevent it from dislodging from the guide sleeve 600, in some examples, the side wall of the positioning sleeve 400 is provided with an axially extending strip-shaped hole 420 that penetrates the side wall of the positioning sleeve 400. Correspondingly, the side of the guide sleeve 600 is provided with a circular hole 610 that also penetrates the side wall of the guide sleeve 600. The circular hole 610 is aligned with the strip-shaped hole 420, and a limiting pin 620 passes through both the strip-shaped hole 420 and the circular hole 610.

[0039] One end of the limiting pin 620 is fixed in the circular hole 610 of the guide sleeve 600, and the other end extends into the strip hole 420 of the positioning sleeve 400. When the positioning sleeve 400 floats upward under the action of the columnar spring 510, the lower end face of the strip hole 420 is blocked by the limiting pin 620, thus limiting the maximum stroke of the positioning sleeve 400 to continue moving upward. Conversely, when the workpiece presses down on the positioning sleeve 400, the upper end face of the strip hole 420 will approach the limiting pin 620, thus limiting the maximum stroke of the positioning sleeve 400 to move downward.

[0040] By cooperating with the limiting pin 620 and the strip hole 420, the floating range of the positioning sleeve 400 can be precisely controlled, ensuring that it has sufficient stroke to adapt to coarse references of different sizes, and preventing the positioning sleeve 400 from slipping out of the guide sleeve 600.

[0041] In some examples, a counterweight 700 is also provided on the base plate 100. The purpose of providing the counterweight 700 is to make the center of mass of the entire fixture coincide with the geometric center. This avoids vibration during high-speed rotational machining, ensuring the smoothness and accuracy of the machining process.

[0042] In some examples, the mounting groove on the liner 200 is a U-shaped opening groove structure. This U-shaped opening groove is formed by cutting from the edge of the liner 200 towards its center. During assembly, the positioning sleeve 400 and guide sleeve 600 can be pre-assembled on the base plate 100, and then the liner 200 is pushed in from the side, allowing the U-shaped opening groove to accommodate the positioning sleeve 400 and guide sleeve 600. Finally, the liner 200 is secured with connecting bolts.

[0043] The following is a detailed description of the working process of the machining fixture for the window cover part 800 provided in the embodiments of this application.

[0044] The worker picks up the window cover part 800 to be processed, aligns the tapered cylinder 820 at the bottom of the workpiece with the tapered hole 410 of the positioning sleeve 400 and places it downwards. The tapered cylinder 820 pushes the positioning sleeve 400 to overcome part of the elastic force of the columnar spring 510 and moves slightly downwards along the guide sleeve 600. At the same time, the tapered surface of the tapered hole 410 guides the tapered cylinder 820 to slide into the hole. During this process, the up-and-down floating of the positioning sleeve 400 and the guiding action of the conical surface work together to automatically compensate for the manufacturing tolerances of the workpiece, guiding the workpiece to a precise positioning position. As the workpiece continues to descend, until the bottom plane 810 of the workpiece is in contact with the horizontal plane 210 of the top of the liner 200, the clamping assembly is installed around the workpiece, and the nut is tightened on the double-ended screw 330. The nut pushes the pressure plate 310 downward, and the two clamping arms 312 of the pressure plate 310 apply downward to the upper surface of the workpiece. At the same time, the bottom end of the fixed shaft 320 is also pressed against the bottom plate 100, thereby completing the clamping of the workpiece. After the workpiece is processed, the nut of the clamping assembly 300 is loosened first, and the pressure plate 310 is removed. Then the processed workpiece is taken out from the positioning sleeve 400.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A machining fixture for a window cover part, characterized in that, include: Base plate; A liner plate is fixed to the base plate, and a horizontal surface is provided on the top of the liner plate, which is used to fit the bottom plane of the window cover part; A clamping assembly is disposed on the base plate and distributed around the liner, the clamping assembly being used to clamp the window cover parts onto the liner; A positioning sleeve is connected to the base plate via an elastic component. The liner is provided with a mounting groove, and the positioning sleeve is located in the mounting groove. The interior of the positioning sleeve has a tapered hole extending in a direction perpendicular to the horizontal plane. The tapered hole is used to mate with the tapered cylinder of the window cover part.

2. The machining fixture for the window cover part according to claim 1, characterized in that: It also includes a guide sleeve, which is fixed on the base plate and located in the mounting groove. The positioning sleeve is slidably assembled in the guide sleeve and can move axially relative to the guide sleeve.

3. The machining fixture for the window cover part according to claim 1, characterized in that: The end face of the positioning sleeve near the base plate is provided with a plurality of axially extending mounting holes, and the mounting holes are distributed circumferentially at intervals. The elastic component includes a plurality of columnar springs, the number of which is the same as the number of mounting holes. Each mounting hole is provided with one columnar spring, one end of which is fitted into the mounting hole and the other end is connected to the base plate.

4. The machining fixture for the window cover part according to claim 3, characterized in that: Both the mounting holes and the columnar spring are provided in threes.

5. The machining fixture for the window cover part according to claim 2, characterized in that: The positioning sleeve has an axially extending strip hole on its side wall, the strip hole penetrating the side wall of the positioning sleeve. The guide sleeve has a circular hole on its side, the circular hole penetrating the side wall of the guide sleeve. The circular hole is aligned with the strip hole, and a limiting pin passes through the strip hole and the circular hole.

6. The machining fixture for the window cover part according to claim 1, characterized in that: The clamping assembly includes a pressure plate, a fixed shaft, a double-ended screw, and a nut. One end of the pressure plate is connected to the base plate via the fixed shaft, and the other end of the pressure plate has a forked structure. One end of the double-ended screw is threaded to the base plate, and the other end passes through the forked structure and is fitted with the nut. The forked end of the pressure plate is used to press against the window cover part.

7. The machining fixture for the window cover part according to claim 6, characterized in that: The pressure plate is provided with an opening groove, which divides the pressure plate into a forked structure, and the double-headed screw is engaged at the root of the opening groove.

8. The machining fixture for the window cover part according to claim 1, characterized in that: A counterweight is provided on the base plate so that the center of mass of the entire fixture coincides with its geometric center.

9. The machining fixture for the window cover part according to claim 1, characterized in that: The mounting groove is a U-shaped open groove structure.

10. The machining fixture for the window cover part according to claim 1, characterized in that: The liner is provided with a countersunk hole, and the base plate is provided with a threaded hole. The countersunk hole and the threaded hole are aligned. A connecting bolt is provided in the countersunk hole and the threaded hole, and the connecting bolt fixes the liner to the base plate.

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