A fixing device for machining a cylindrical part

Abstract

The utility model provides a kind of fixing device for barrel type part processing, it is related to part processing fixing device technical field, it includes rack, rotationally arranged lower turntable in rack, upper turntable is driven telescopic to be arranged in the top of rack downward, upper turntable and lower turntable coaxially are arranged and can independently rotate each other, and processing knife rest is fixedly arranged in the side of rack, a pair of positioning plate is relatively slidably arranged on lower turntable, positioning groove is arranged to the opposite inner side of positioning plate, synchronous drive mechanism is also fixedly arranged on lower turntable, and synchronous drive mechanism is respectively connected with two positioning plates, for driving two positioning plates synchronous relative movement or back movement;It is driven positioning plate synchronous relative sliding or back sliding by synchronous drive mechanism, so that without needing to process positioning hole on workpiece, also without needing to frequently replace positioning ring, different diameter barrel type part self-adapting centering can be realized by positioning groove and workpiece bottom side wall point contact, significantly improve the device applicability and processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of parts processing fixing devices, and in particular to a fixing device for processing cylindrical parts. Background Technology

[0002] In the field of machining, some large parts often require fixing devices to secure them during processing, thereby ensuring the accurate execution of processes such as drilling, cutting, or grinding. Cylindrical parts often involve rotational movements to process their sidewalls, which requires precise concentric positioning and clamping of the cylindrical parts to prevent them from shifting or vibrating during processing, thus ensuring processing quality and efficiency.

[0003] Existing part fixing devices typically use pre-drilled positioning holes at the bottom of the part or rely on fixed limiting rings installed on the placement platform for positioning when processing cylindrical parts. The cylindrical body is aligned and fixed using the hole or ring-shaped limiting structure, and then processing is carried out. However, this method has significant limitations. For example, the bottom positioning holes need to be machined additionally, which not only increases the production steps but may also damage the integrity of the part, affecting its design function and strength. Furthermore, the fixed-size limiting rings cannot flexibly adapt to cylindrical parts of different sizes, requiring frequent replacement of the rings, increasing the complexity of the device and failing to meet diverse production needs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a fixing device for machining cylindrical parts, which solves the problems of existing fixing devices requiring pre-machining of positioning holes, which damages the part structure, or requiring frequent replacement of limiting rings, thus failing to meet diverse production needs.

[0005] According to an embodiment of this utility model, a fixing device for machining cylindrical parts includes a frame, a lower turntable rotatably disposed within the frame, and an upper turntable retractably disposed on the top of the frame. The upper and lower turntables are coaxially arranged and can rotate independently of each other. A machining tool holder is fixedly disposed on one side of the frame. A pair of positioning plates are slidably disposed on the lower turntable, and positioning grooves are provided on the inner sides of the positioning plates. A synchronous drive mechanism is also fixedly disposed on the lower turntable. The synchronous drive mechanism is connected to the two positioning plates respectively and is used to drive the two positioning plates to move synchronously towards or away from each other.

[0006] The working principle of this utility model is as follows: The cylindrical part to be processed is placed on the lower turntable, and a pair of positioning plates are driven to move synchronously towards each other through a synchronous drive mechanism. The positioning grooves on the inner side of the positioning plates form multi-point contact with the outer wall of the cylindrical part, so as to achieve fast and accurate concentric positioning of the part. Then, the upper turntable is controlled to move downward to press the top of the part, so that it is stably fixed between the upper and lower turntables. At this time, the part can rotate freely with the turntable. Finally, the side wall or end face of the part is processed by the processing tool holder.

[0007] Furthermore, a groove is fixedly provided on the top of the lower turntable, and a slider that can slide within the groove is fixedly provided on the bottom of the positioning plate.

[0008] Furthermore, the synchronous drive mechanism includes a bidirectional lead screw, a threaded hole, and a drive source. The bidirectional lead screw is rotatably disposed in the slide groove, and the threaded hole is disposed through the slider. The threaded holes of the two sliders have opposite thread directions and respectively mesh with the two ends of the bidirectional lead screw. The drive source is disposed on one side of the lower turntable, and its output end is fixedly connected to one end of the bidirectional lead screw.

[0009] Furthermore, the drive source includes a hand crank.

[0010] Furthermore, the drive source includes a micro motor.

[0011] Furthermore, the positioning groove includes a V-shaped groove and an arc-shaped groove.

[0012] Furthermore, a clamping cylinder is fixedly installed on the upper part of the frame, and the output shaft of the clamping cylinder is fixedly connected to an upper bearing seat, with the upper turntable rotatably connected to the upper bearing seat.

[0013] Furthermore, a lower bearing seat is fixedly installed at the bottom of the frame, and a rotating shaft that is rotatably connected to the lower bearing seat is fixedly installed at the bottom of the lower turntable. A first bevel gear is fixedly connected to the end of the rotating shaft. A drive motor is fixedly installed on one side of the bottom of the frame, and a second bevel gear is fixedly connected to the output end of the drive motor. The second bevel gear meshes with the first bevel gear.

[0014] Compared with the prior art, this utility model has the following advantages: by driving the positioning plates to slide synchronously in opposite directions through the synchronous drive mechanism, it is possible to achieve adaptive centering of cylindrical parts of different diameters by point contact between the positioning groove and the bottom side wall of the workpiece without machining positioning holes on the workpiece or frequently changing the positioning ring. At the same time, the clamping support of the upper and lower turntables ensures the stability of workpiece clamping, realizes the convenience of multi-angle processing of workpieces, and significantly improves the applicability and processing efficiency of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the synchronous drive mechanism according to an embodiment of the present invention.

[0017] In the above attached figures: 1. Frame; 2. Lower turntable; 21. Rotating shaft; 22. Lower bearing seat; 221. First bevel gear; 23. Drive motor; 231. Second bevel gear; 3. Upper turntable; 31. Clamping cylinder; 311. Output shaft; 32. Upper bearing seat; 4. Synchronous drive mechanism; 41. Positioning plate; 411. Positioning groove; 42. Slide groove; 43. Slider; 431. Threaded hole; 44. Double-acting lead screw; 45. Hand crank; 5. Machining tool holder; 6. Control box; 7. Air compressor. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-2 As shown in the figure, this utility model embodiment proposes a fixing device for processing cylindrical parts, which includes a frame 1. The frame 1 is formed by several columns and plates fixedly connected to each other to form a stable support frame. A lower turntable 2 is rotatably arranged in the middle of the frame 1 to support the cylindrical parts and provide a base for rotation. An upper turntable 3 is driven downward and extended at the top of the frame 1. The upper turntable 3 and the lower turntable 2 are coaxially arranged and can rotate independently of each other, realizing the coordination of upper clamping and lower support of the workpiece. A processing tool is fixedly arranged on one side of the frame 1. The tool holder 5 facilitates multi-directional machining of the workpiece sidewall. A control box 6 is fixedly installed on one side of the bottom of the frame 1 for quick control of the electrical control equipment. A pair of positioning plates 41 are slidably arranged on the lower turntable 2. Positioning grooves 411 are provided on the inner sides of the two positioning plates 41. The positioning grooves 411 make point contact with the bottom sidewall of the workpiece to achieve precise concentric positioning of the cylindrical part. A synchronous drive mechanism 4 is also fixedly installed on the lower turntable 2. The synchronous drive mechanism 4 is connected to the two positioning plates 41 respectively and is used to drive the two positioning plates 41 to move synchronously towards or away from each other.

[0020] In this exemplary embodiment, the cylindrical part to be processed is first placed on the lower turntable 2. The synchronous drive mechanism 4 drives a pair of positioning plates 41 to move synchronously towards each other. The positioning grooves 411 on the inner side of the positioning plates 41 form multi-point contact with the outer wall of the cylindrical part, so as to achieve fast and accurate concentric positioning of the part. Then, the upper turntable 3 is controlled to move downward to press the top of the part, so that it is stably fixed between the upper and lower turntables 2. At this time, the part can rotate freely with the turntable. Finally, the side wall or end face of the part is processed by the processing tool holder 5.

[0021] In this exemplary embodiment, the size and distance between the upper turntable 3 and the lower turntable 2 are flexibly set according to actual conditions. The machining tool holder 5 is mounted on the column of the frame 1 in a sliding or rotating manner, and is equipped with corresponding locking and driving mechanisms to meet different processing needs. The specific types and sizes of the tools can also be flexibly set according to actual processing needs. Both the selection and installation of tools are very mature existing technologies, and will not be elaborated here. In this embodiment, the positioning plate 41 is driven to slide synchronously in opposite directions or in opposite directions by the synchronous driving mechanism 4, so that there is no need to machine positioning holes on the workpiece or frequently change the positioning ring. The positioning groove 411 can be used to make point contact with the bottom side wall of the workpiece to achieve adaptive centering of cylindrical parts of different diameters. At the same time, the clamping support of the upper turntable 3 and the lower turntable 2 ensures the stability of workpiece clamping, realizes the convenience of multi-angle processing of workpieces, and significantly improves the applicability and processing efficiency of the device.

[0022] like Figure 1-2 As shown, in another embodiment, a slide groove 42 is fixedly provided on the top of the lower turntable 2, and a slider 43 that precisely matches the slide groove 42 is fixedly provided on the bottom of the positioning plate 41. The slider 43 can slide stably in a straight line along the slide groove 42. Based on the above configuration, the guide pair formed by the slide groove 42 and the slider 43 provides precise constraint and guidance for the radial movement of the positioning plate 41, ensuring that its movement trajectory is straight and without deviation, thereby enhancing the stability and repeatability of the centering and positioning process of the cylindrical part.

[0023] like Figure 1-2As shown, in this embodiment, the synchronous drive mechanism 4 further includes a bidirectional lead screw 44, a threaded hole 431, and a drive source. The bidirectional lead screw 44 is rotatably disposed within the slide groove 42, and the threaded hole 431 is disposed through the slider 43. The threads of the threaded holes 431 of the two sliders 43 are opposite in direction and respectively mesh with both ends of the bidirectional lead screw 44. The drive source is disposed on one side of the lower turntable 2, and its output end is fixedly connected to one end of the bidirectional lead screw 44. Based on the above configuration, by driving the bidirectional lead screw 44 to rotate, the two sliders 43 can be driven to move synchronously towards or away from each other along the screw by means of their opposite threads, converting a single drive input into precise synchronous reverse linear motion of the two positioning plates 41. The structure is simple and practical, ensuring strict synchronization and central symmetry of the movement of the positioning plates 41. In some other embodiments, the synchronous drive mechanism 4 also includes a gear and rack mechanism. Specifically, an intermediate gear is rotatably mounted on the frame 1, with a pair of racks meshing on both sides of the intermediate gear. The two racks are fixedly connected to two positioning plates 41. By driving the intermediate gear to rotate, the racks on both sides can move synchronously in opposite directions. It also includes a synchronous belt pulley mechanism, specifically: a closed-loop synchronous belt is fixedly installed inside the frame 1, with two sliders 43 connected to the upper and lower sides of the synchronous belt. By driving the synchronous belt to rotate, the two connecting plates can move synchronously in opposite directions. In comparison, the threaded mechanism of the bidirectional lead screw 44 in this embodiment has lower assembly complexity and occupies less space. With the inherent self-locking property of the screw drive, it effectively prevents the positioning plates 41 from shifting when subjected to force, ensuring the stability and reliability of clamping and positioning. It can achieve high-precision synchronous symmetrical movement, and has stronger wear resistance under high load conditions. It also has greater advantages in overall manufacturing cost and maintenance requirements.

[0024] like Figure 1-2 As shown, in this embodiment, the driving source further includes a hand crank 45, which is directly fixedly connected to the end of the bidirectional lead screw 44. The bidirectional lead screw 44 is driven to rotate by manually rotating the hand crank 45. The operator can directly and precisely control the movement of the positioning plate 41 through the hand crank 45. The operation process provides the user with intuitive force feedback, which helps to fine-tune the clamping force according to the feel, thus improving the ease of operation of the device. Furthermore, the driving source includes a micro motor, the output end of which is directly or fixedly connected to the end of the bidirectional lead screw 44 through a coupling. The rotation direction of the bidirectional lead screw 44 is controlled by the forward and reverse rotation of the micro motor. The operator can quickly switch between clamping and releasing through circuit control without manually applying force, which significantly improves the adjustment efficiency and ease of operation. It is especially suitable for processing scenarios that require frequent adjustments or for workpieces with large loads. The stable output of the motor drive ensures that the movement of the positioning plate 41 is more stable and controllable, which is conducive to improving the repeatability and consistency of centering and positioning.

[0025] like Figure 1-2As shown, in another embodiment, the positioning groove 411 specifically includes a V-shaped groove and an arc-shaped groove. The V-shaped groove can adaptively accommodate and position cylindrical parts through its unique inclined angle structure, and achieve fast and accurate automatic centering by utilizing the guiding effect of the inclined surface. The arc-shaped groove can better fit the outer wall of the standard cylindrical part, forming a larger contact area to enhance positioning stability. In the actual production process, the shape of the positioning groove 411 can be flexibly set according to production needs.

[0026] like Figure 1-2 As shown, in another embodiment, a clamping cylinder 31 is fixedly installed on the upper part of the frame 1. The clamping cylinder 31 is externally connected to an air compressor 7. The output shaft 311 of the clamping cylinder 31 extends vertically downward and is fixedly connected to an upper bearing seat 32. The upper turntable 3 is rotatably connected to the upper bearing seat 32 through a bearing. Based on the above configuration, the clamping cylinder 31 can provide a stable and controllable vertical downward clamping force, which is transmitted to the upper turntable 3 through the upper bearing seat 32 to clamp the workpiece. The bearing structure inside the upper bearing seat 32 ensures that the upper turntable 3 can still rotate freely under the clamping force, which not only ensures the stability of the processing process, but also ensures the flexibility and reliability of the operation.

[0027] like Figure 1-2 As shown, in another embodiment, a lower bearing seat 22 is fixedly installed at the bottom of the frame 1, and a rotating shaft 21 is fixedly connected to the bottom of the lower turntable 2. The rotating shaft 21 and the lower bearing seat 22 form a rotational engagement to achieve stable rotation of the lower turntable 2. A first bevel gear 221 is fixedly connected to the end of the rotating shaft 21. A drive motor 23 is fixedly installed on one side of the bottom of the frame 1. A second bevel gear 231 is fixedly connected to the output end of the drive motor 23. The second bevel gear 231 meshes with the first bevel gear 221. Based on the above configuration, the horizontal rotational motion output by the drive motor 23 is converted into the vertical rotation of the rotating shaft 21 through the mutually perpendicular meshing first bevel gear 221 and second bevel gear 231, thereby driving the entire lower turntable 2 and the workpiece on it to rotate smoothly. The spatial layout is more compact, and the bevel gear transmission has the characteristics of stable transmission ratio and strong load-bearing capacity, ensuring the rotational stability and transmission accuracy during the processing, and providing a reliable power foundation for the circumferential processing of cylindrical parts.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixing device for machining cylindrical parts, comprising a frame (1), a lower turntable (2) rotatably disposed inside the frame (1), an upper turntable (3) being driven downward and extended at the top of the frame (1), the upper turntable (3) and the lower turntable (2) being coaxially disposed and capable of rotating independently of each other, and a machining tool holder (5) fixedly disposed on one side of the frame (1), characterized in that: A pair of positioning plates (41) are slidably arranged on the lower turntable (2). Positioning grooves (411) are provided on the inner side of the positioning plates (41). A synchronous drive mechanism (4) is also fixedly arranged on the lower turntable (2). The synchronous drive mechanism (4) is connected to the two positioning plates (41) respectively and is used to drive the two positioning plates (41) to move synchronously towards each other or away from each other.

2. The fixing device for machining cylindrical parts as described in claim 1, characterized in that: The top of the lower turntable (2) is fixedly provided with a slide groove (42), and the bottom of the positioning plate (41) is fixedly provided with a slider (43) that can slide in the slide groove (42).

3. The fixing device for machining cylindrical parts as described in claim 2, characterized in that: The synchronous drive mechanism (4) includes a bidirectional lead screw (44), a threaded hole (431) and a drive source. The bidirectional lead screw (44) is rotatably disposed in the slide groove (42), and the threaded hole (431) is disposed through the slider (43). The thread directions of the threaded holes (431) of the two sliders (43) are opposite and respectively mesh with the two ends of the bidirectional lead screw (44). The drive source is disposed on one side of the lower turntable (2), and its output end is fixedly connected to one end of the bidirectional lead screw (44).

4. The fixing device for machining cylindrical parts as described in claim 3, characterized in that: The drive source includes a hand crank (45).

5. The fixing device for machining cylindrical parts as described in claim 3, characterized in that: The driving source includes a micro motor.

6. The fixing device for machining cylindrical parts as described in claim 1, characterized in that: The positioning groove (411) includes a V-shaped groove and an arc-shaped groove.

7. The fixing device for machining cylindrical parts as described in claim 1, characterized in that: A clamping cylinder (31) is fixedly installed on the upper part of the frame (1). The output shaft (311) of the clamping cylinder (31) is fixedly connected to an upper bearing seat (32). The upper turntable (3) is rotatably connected to the upper bearing seat (32).

8. The fixing device for machining cylindrical parts as described in claim 1, characterized in that: The bottom of the frame (1) is fixedly provided with a lower bearing seat (22), and the bottom of the lower turntable (2) is fixedly provided with a rotating shaft (21) that is rotatably connected to the lower bearing seat (22). The end of the rotating shaft (21) is fixedly connected with a first bevel gear (221). A drive motor (23) is fixedly provided on one side of the bottom of the frame (1). The output end of the drive motor (23) is fixedly connected with a second bevel gear (231). The second bevel gear (231) meshes with the first bevel gear (221).

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