Workpiece clamping and fixing device for machining center

Abstract

The utility model discloses a workpiece clamping and fixing device for a machining center, and relates to the technical field of machining centers. The workpiece clamping and fixing device for the machining center comprises a fixing plate, and the upper end of the fixing plate is fixedly connected with a fixing cylinder; the limiting assembly comprises a rotating shaft, and the upper end of the rotating shaft is fixedly connected with a spiral guide strip. A movable block is slidably connected to the interior of the fixing cylinder, a guide block is fixedly connected to the lower end of the movable block, a protection plate is fixedly connected to the upper end of the movable block, and a workpiece clamping block is arranged at the upper end of the protection plate. The fixing bolts are loosened to adjust the positions of the workpiece clamping blocks so that the workpiece clamping blocks can be tightly matched with the surface contours of the workpieces, then the bolts are tightened for fixation, accurate preliminary positioning of different workpieces is achieved, the applicability of the device to various workpieces is improved, and the machining efficiency of a machining center is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining center technology, and in particular to a workpiece clamping and fixing device for machining centers. Background Technology

[0002] Vertical machining centers are mainly used for machining parts with complex shapes, but the fixtures used are often not complex in structure. The selection of CNC milling machine fixtures can first be determined based on the batch size of the parts produced. For mold processing with single pieces, small batches, and large workloads, positioning and clamping can generally be achieved directly on the machine tool worktable by adjustment, and then the position of the part can be determined by setting the machining coordinate system. Chinese utility model patent, authorization announcement number "CN216463147U", discloses a workpiece fixing device for a vertical machining center, including a base, a rotating shaft supported by a bearing at the bottom of the inner cavity of the base, an auxiliary gear fixedly installed on the surface of the rotating shaft, and a drive motor fixedly installed at the top of the inner cavity of the base.

[0003] The above technical solution uses a rotating mechanism to drive the clamping mechanism to rotate, which facilitates the clamping mechanism to clamp the workpiece and to deliver the workpiece after processing. However, the above technical solution still has certain defects. The structure of the device is complex, and a large number of drive structures are used in just one clamping mechanism. The operation process is cumbersome and it is easy to reduce the working efficiency of the device. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a workpiece clamping and fixing device for machining centers. This device has a complex structure, uses a large number of drive structures in just one clamping mechanism, and has a cumbersome operation process that can easily reduce the working efficiency of the device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a workpiece clamping and fixing device for a machining center, comprising a fixing plate, wherein a fixing cylinder is fixedly connected to the upper end of the fixing plate;

[0006] The drive assembly is mounted on the fixed plate, and the limit assembly is mounted on the fixed cylinder. The limit assembly includes a rotating shaft, which is rotatably connected inside the fixed cylinder. A spiral guide bar is fixedly connected to the upper end of the rotating shaft.

[0007] The fixed cylinder has a movable block that is slidably connected inside. The upper surface of the fixed cylinder has a groove, and the movable block is slidably connected to the groove. The lower end of the movable block is fixedly connected to a guide block, and the guide block is slidably connected to a spiral guide strip.

[0008] A protective plate is fixedly connected to the upper end of the movable block. The protective plate covers the upper end of the slide groove, and a workpiece clamping block is provided at the upper end of the protective plate.

[0009] Preferably, the limiting component further includes a positioning hole, which is formed on the surface of the protective plate, and the surface of the workpiece clamping block is also provided with a positioning hole;

[0010] The positioning holes on the surface of the workpiece clamping block are threaded with fixing bolts, and the protective plate and the workpiece clamping block are fixed together by fixing bolts;

[0011] There are multiple sets of positioning holes on the surface of the protective plate.

[0012] Preferably, the drive assembly includes a drive housing, which is fixedly connected to the lower end of the fixed plate, and a drive motor is fixedly connected to the upper end of the fixed plate. The output end of the drive motor extends into the interior of the drive housing and is fixedly connected to a gear.

[0013] A gear ring is fixedly connected to the surface of the shaft, and the gear ring meshes with a gear.

[0014] Preferably, the number of movable blocks, guide blocks, slides, protective plates, workpiece clamping blocks, and positioning holes are all arranged in multiple sets in a circular array inside the fixed cylinder.

[0015] Preferably, a connecting flange is fixedly connected to the surface of the drive box, and the surface of the connecting flange has multiple mounting holes.

[0016] Preferably, the fixed cylinder is a cylindrical shape that runs vertically through the shaft, and the rotating shaft is a cylindrical shape with an opening at the lower end.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This machining center uses a workpiece clamping and fixing device. The protective plate and workpiece clamping blocks facilitate workpiece fixation. Both the protective plate and the workpiece clamping blocks have positioning holes and are connected by fixing bolts. Before machining, the position of the workpiece clamping blocks can be adjusted by loosening the fixing bolts according to the workpiece shape, size, and positioning requirements, ensuring a tight match with the workpiece surface contour. Then, the bolts are tightened to fix the workpiece, achieving precise initial positioning for different workpieces. This improves the device's applicability to various workpieces. Furthermore, the workpiece clamping process is driven only by a drive motor, enhancing the device's convenience and practicality while reducing its complexity. This, in turn, improves the workpiece clamping effect and increases the machining center's processing efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1This is a schematic diagram of the structure of a workpiece clamping and fixing device for a machining center according to the present invention;

[0021] Figure 2 This is a schematic diagram of the gear of this utility model;

[0022] Figure 3 This is a schematic diagram of the spiral guide bar of this utility model;

[0023] Figure 4 This is a schematic diagram of the slide groove of this utility model;

[0024] Figure 5 This is a schematic diagram of the fixing cylinder of this utility model;

[0025] Figure 6 This is a schematic diagram of the workpiece clamping block of this utility model.

[0026] Reference numerals: 1. Fixing plate; 2. Drive box; 3. Connecting flange; 4. Fixing cylinder; 5. Rotating shaft; 6. Gear ring; 7. Drive motor; 8. Gear; 9. Spiral guide bar; 10. Movable block; 11. Guide block; 12. Slide groove; 13. Protective plate; 14. Workpiece clamping block; 15. Positioning hole. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Please see Figure 1-6 This utility model provides a technical solution: a workpiece clamping and fixing device for a machining center, including a fixing plate 1, a fixing cylinder 4 fixedly connected to the upper end of the fixing plate 1, a driving assembly disposed on the fixing plate 1, and a limiting assembly disposed on the fixing cylinder 4. The limiting assembly includes a rotating shaft 5, which is rotatably connected inside the fixing cylinder 4. A spiral guide bar 9 is fixedly connected to the upper end of the rotating shaft 5. A movable block 10 is slidably connected inside the fixing cylinder 4. A groove 12 is formed on the upper surface of the fixing cylinder 4. The movable block 10 is slidably connected to the groove 12. A guide block 11 is fixedly connected to the lower end of the movable block 10 and is slidably connected to the spiral guide bar 9. A protective plate 13 is fixedly connected to the upper end of the movable block 10, which covers the upper end of the groove 12. A workpiece clamping block 14 is provided on the upper end of the protective plate 13.

[0032] The limiting component also includes positioning holes 15, which are formed on the surface of the protective plate 13. The surface of the workpiece clamping block 14 is also provided with positioning holes 15. The positioning holes 15 on the surface of the workpiece clamping block 14 are internally threaded with fixing bolts. The protective plate 13 and the workpiece clamping block 14 are fixed together by fixing bolts. There are multiple sets of positioning holes 15 on the surface of the protective plate 13.

[0033] The drive assembly includes a drive housing 2, which is fixedly connected to the lower end of a fixed plate 1. A drive motor 7 is fixedly connected to the upper end of the fixed plate 1. The output end of the drive motor 7 extends into the interior of the drive housing 2 and is fixedly connected to a gear 8. A gear ring 6 is fixedly connected to the surface of the rotating shaft 5, and the gear ring 6 meshes with the gear 8.

[0034] The number of movable blocks 10, guide blocks 11, slides 12, protective plates 13, workpiece clamping blocks 14 and positioning holes 15 are all arranged in multiple sets in a circular array inside the fixed cylinder 4.

[0035] A connecting flange 3 is fixedly connected to the surface of the drive box 2, and multiple mounting holes are provided on the surface of the connecting flange 3.

[0036] The fixed cylinder 4 is a cylindrical shape that runs through the top and bottom, and the rotating shaft 5 is a cylindrical shape with an opening at the bottom.

[0037] When using this device, first, the drive box 2 is installed on the worktable of the machining center via the connecting flange 3; the multiple mounting holes on the surface of the connecting flange 3 make it easy to use bolts and other connecting parts to securely fix the device; this installation method is not only firm and reliable, but also convenient to flexibly adjust the position of the device on the worktable according to the needs of different processing tasks, so that the device can be perfectly adapted to the machining center.

[0038] Before processing, the workpiece is placed on the upper end of the fixed cylinder 4. Since the limiting components of the device have positioning holes 15 on the surface of the protective plate 13 and the surface of the workpiece clamping block 14, and are connected by fixing bolts, this provides convenience for adapting to different workpieces. According to the shape, size and positioning requirements of the workpiece, the fixing bolts in the positioning holes 15 on the surface of the workpiece clamping block 14 are loosened. At this time, the position of the workpiece clamping block 14 relative to the protective plate 13 can be adjusted. The workpiece clamping block 14 is adjusted to a position that matches the surface contour of the workpiece to ensure that it can fit tightly against the workpiece during subsequent clamping. After the adjustment is completed, the fixing bolts are tightened to fix the position of the workpiece clamping block 14, thus achieving the initial positioning of the workpiece.

[0039] After the workpiece is pre-positioned, the drive motor 7 in the drive assembly is started. The drive motor 7 is mounted on the fixed plate 1, and its output end extends into the drive box 2 and is fixedly connected to the gear 8. The drive motor 7 starts running and drives the gear 8 to rotate. Because the gear 8 meshes with the gear ring 6 fixed on the surface of the rotating shaft 5, the rotation of the gear 8 is transmitted to the gear ring 6, which in turn drives the gear ring 6 to drive the rotating shaft 5 to rotate inside the fixed cylinder 4. This transmission process is stable and reliable, providing power support for the subsequent workpiece clamping action.

[0040] When the rotating shaft 5 rotates, the spiral guide bar 9 fixedly connected to its upper end rotates synchronously; the spiral guide bar 9 is slidably connected to the guide block 11 fixedly connected to the lower end of the movable block 10, and the movable block 10 slides inside the fixed cylinder 4, slidingly engaging with the slide groove 12 opened on the upper surface of the fixed cylinder 4; as the spiral guide bar 9 continues to rotate, the guide block 11, under its guidance, drives the movable block 10 to move smoothly along the slide groove 12.

[0041] The upper end of the movable block 10 is fixedly connected to the protective plate 13, which covers the upper end of the slide groove 12. This effectively prevents impurities from entering the interior of the fixed cylinder 4 during the processing, and prevents impurities from affecting key components such as the spiral guide bar 9, thus ensuring the normal operation and service life of the device. The workpiece clamping block 14 set on the upper end of the protective plate 13 will move with the movement of the movable block 10.

[0042] Because multiple sets of movable blocks 10, workpiece clamping blocks 14 and other components are arranged in a ring array inside the fixed cylinder 4, during the movement of the movable blocks 10, multiple workpiece clamping blocks 14 gradually approach the workpiece from different directions; the precise adjustment of the position of the workpiece clamping blocks 14 beforehand ensures that each workpiece clamping block 14 can closely fit the workpiece surface; the multiple workpiece clamping blocks 14 work together to achieve stable clamping of the workpiece, ensuring that the workpiece will not be displaced or shaken during the processing, thus meeting the strict requirements of high-precision processing.

[0043] Furthermore, the protective plate 13 and workpiece clamping block 14 facilitate the fixation of the workpiece. Both the protective plate 13 and the workpiece clamping block 14 have positioning holes 15 on their surfaces and are connected by fixing bolts. Before processing, the position of the workpiece clamping block 14 can be adjusted by loosening the fixing bolts according to the shape, size and positioning requirements of the workpiece, so that it closely matches the surface contour of the workpiece. Then the bolts are tightened to fix it, achieving accurate preliminary positioning of different workpieces. This improves the applicability of the device to various types of workpieces. Moreover, the workpiece clamping process is driven only by the drive motor 7, which improves the convenience and practicality of the device when using it, while reducing the complexity of the device. This, in turn, improves the workpiece clamping effect and increases the processing efficiency of the machining center.

[0044] The drive box 2 is installed on the worktable of the machining center via the connecting flange 3. Multiple mounting holes on the connecting flange 3 are connected with bolts for a secure installation. The position of the device on the worktable can be flexibly adjusted according to different machining tasks, so that the device can be perfectly adapted to the machining center, meet diverse machining needs, and improve the practicality and convenience of the device.

[0045] Structural Description: Fixed Plate 1: As the basic support component of the entire device, it provides a platform for the installation and fixation of the drive assembly and the fixed cylinder 4, ensuring the stability and integrity of each part of the device structure;

[0046] Drive box 2: Provides a space for the output end of drive motor 7, protects transmission components such as gear 8, and also plays a certain role in protection and sealing to prevent external impurities from entering and affecting the transmission effect;

[0047] Connection flange 3: Through multiple mounting holes on its surface, bolts and other fasteners are used to install the entire device on the worktable of the machining center, so as to achieve a stable connection between the device and the machining center and facilitate the adjustment of the device position according to the machining requirements.

[0048] Fixed cylinder 4: As the mounting carrier of the limiting components, it provides space for the installation and movement of components such as rotating shaft 5 and movable block 10, ensuring that each component can operate in an orderly manner inside it;

[0049] Rotating shaft 5: As an intermediate component for power transmission, it transmits the power of the drive motor 7 to the spiral guide bar 9 through the meshing of the gear ring 6 and the gear 8, thereby driving the spiral guide bar 9 to rotate.

[0050] Gear ring 6: Fixed on the surface of the rotating shaft 5, meshing with the gear 8, realizing the transmission of power from the drive motor 7 to the rotating shaft 5, and is the key link in the power transmission between the drive assembly and the limit assembly;

[0051] Drive motor 7: As the power source of the entire device, it provides rotational power and drives the operation of the entire device by rotating gear 8;

[0052] Gear 8: It is fixedly connected to the output end of the drive motor 7, and transmits the power of the drive motor 7 to the gear ring 6, thereby driving the rotating shaft 5 to rotate;

[0053] Spiral guide bar 9: Fixed to the upper end of the rotating shaft 5, it rotates with the rotation of the rotating shaft 5; through sliding connection with the guide block 11, it converts the circular motion of the rotating shaft 5 into the linear motion of the movable block 10, thereby realizing the clamping and releasing action of the workpiece.

[0054] Movable block 10: slides inside the fixed cylinder 4 and slides in cooperation with the slide groove 12; driven by the guide block 11, it moves along the slide groove 12, thereby driving the protective plate 13 and the workpiece clamping block 14 to move, so as to realize the clamping operation of the workpiece.

[0055] Guide block 11: Fixed to the lower end of movable block 10 and slidably connected to spiral guide bar 9; when spiral guide bar 9 rotates, guide block 11 drives movable block 10 to move under its guidance, playing the role of guiding and transmitting power;

[0056] Slide 12: It is formed on the upper surface of the fixed cylinder 4 to provide a track for the sliding of the movable block 10, ensuring that the movable block 10 can move smoothly in a specific direction and ensuring that the workpiece clamping block 14 accurately clamps the workpiece.

[0057] Protective plate 13: Fixed to the upper end of movable block 10, covering the upper end of slide groove 12; its function is to prevent impurities in the processing process from entering the interior of fixed cylinder 4 through slide groove 12, avoiding impurities from affecting key components such as spiral guide bar 9, and ensuring the normal operation and service life of the device.

[0058] Workpiece clamping block 14: It is set at the upper end of the protective plate 13 and moves with the movement of the movable block 10; multiple workpiece clamping blocks 14 work together from different directions to stably clamp the workpiece and ensure that the workpiece will not be displaced or shaken during the processing.

[0059] Positioning holes 15: These are respectively opened on the surfaces of the protective plate 13 and the workpiece clamping block 14. By connecting the fixing bolts through the positioning holes 15 on the surface of the workpiece clamping block 14, the protective plate 13 and the workpiece clamping block 14 are fixedly connected. At the same time, by adjusting the position of the fixing bolts, the position of the workpiece clamping block 14 can be flexibly adjusted to adapt to workpieces of different shapes and sizes.

[0060] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model 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 the present utility model.

Claims

1. A workpiece clamping and fixing device for a machining center, characterized in that: It includes a fixing plate (1), and a fixing cylinder (4) is fixedly connected to the upper end of the fixing plate (1); The driving component is set on the fixed plate (1), and the limiting component is set on the fixed cylinder (4). The limiting component includes a rotating shaft (5), which is rotatably connected to the inside of the fixed cylinder (4). A spiral guide strip (9) is fixedly connected to the upper end of the rotating shaft (5). The fixed cylinder (4) has a movable block (10) slidably connected inside. The upper surface of the fixed cylinder (4) is provided with a groove (12). The movable block (10) is slidably connected to the groove (12). The lower end of the movable block (10) is fixedly connected to a guide block (11). The guide block (11) is slidably connected to the spiral guide strip (9). A protective plate (13) is fixedly connected to the upper end of the movable block (10). The protective plate (13) covers the upper end of the slide groove (12). A workpiece clamping block (14) is provided at the upper end of the protective plate (13).

2. The workpiece clamping and fixing device for a machining center according to claim 1, characterized in that: The limiting component also includes a positioning hole (15), which is opened on the surface of the protective plate (13), and the workpiece clamping block (14) is also provided with a positioning hole (15). The positioning hole (15) on the surface of the workpiece clamping block (14) is internally threaded with a fixing bolt, and the protective plate (13) and the workpiece clamping block (14) are fixed together by the fixing bolt; There are multiple sets of positioning holes (15) on the surface of the protective plate (13).

3. The workpiece clamping and fixing device for a machining center according to claim 1, characterized in that: The drive assembly includes a drive box (2), which is fixedly connected to the lower end of the fixed plate (1). A drive motor (7) is fixedly connected to the upper end of the fixed plate (1). The output end of the drive motor (7) extends into the interior of the drive box (2) and is fixedly connected to a gear (8). A gear ring (6) is fixedly connected to the surface of the rotating shaft (5), and the gear ring (6) meshes with the gear (8).

4. The workpiece clamping and fixing device for a machining center according to claim 1, characterized in that: The number of movable blocks (10), guide blocks (11), slides (12), protective plates (13), workpiece clamping blocks (14) and positioning holes (15) are all arranged in multiple sets in a ring array inside the fixed cylinder (4).

5. The workpiece clamping and fixing device for a machining center according to claim 3, characterized in that: The surface of the drive box (2) is fixedly connected to a connecting flange (3), and the surface of the connecting flange (3) is provided with multiple mounting holes.

6. The workpiece clamping and fixing device for a machining center according to claim 1, characterized in that: The fixed cylinder (4) is a cylindrical shape that runs through the top and bottom, and the rotating shaft (5) is a cylindrical shape with an opening at the bottom.

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