A quick positioning fixture for CNC drilling machines

Abstract

This utility model belongs to the field of positioning fixture technology and discloses a quick positioning fixture for CNC drilling machines. It includes a base plate, a worktable fixedly mounted on the upper surface of the base plate, a lifting mechanism fixedly mounted on the upper surface of the base plate, a limiting mechanism fixedly mounted on one side of the lifting mechanism, and a lifting base that fits against the upper surface of the base plate. A lifting frame is fixedly mounted on the upper surface of the lifting base, a lifting screw is rotatably mounted on one side of the lifting frame, a lifting plate is slidably mounted on the inner side of the lifting frame, and lifting rods are fixedly mounted on both sides of the lifting plate. This utility model, through the lifting mechanism, can flexibly adjust the height of the lifting plate, ensuring a stable and accurate lifting process to meet different processing height requirements. Furthermore, through the limiting mechanism, the push plate can accurately position and clamp the workpiece on the worktable, achieving rapid, accurate, and stable workpiece positioning, thus improving processing efficiency and quality.

Description

Technical Field

[0001] This utility model belongs to the field of positioning fixture technology, specifically a quick positioning fixture for CNC drilling machines. Background Technology

[0002] Quick positioning fixtures for CNC drilling machines are suitable for machining various workpieces on CNC drilling machines. They are especially suitable for production tasks that require frequent switching between parts of different shapes and sizes, as well as precision drilling operations that require high machining accuracy and rapid positioning adjustments. Examples include positioning and drilling of aero-engine blades, drilling of precision brackets for medical devices, and precision machining of multiple holes in mold inserts. These fixtures can quickly adapt to the workpiece to achieve stable clamping and precise positioning, reducing clamping time and positioning errors, adapting to complex machining needs, and ensuring high-precision and high-efficiency production.

[0003] However, the following problems were found in the implementation of the relevant technologies:

[0004] In existing CNC drilling machine fixture technology, there is a common problem that the inconvenience and poor stability of fixture height adjustment make it difficult to adapt to the machining height requirements of workpieces of different sizes. When machining large workpieces, if the fixture height is fixed or inflexible, the contact position between the drill bit and the workpiece will be improper, affecting the drilling depth and accuracy, and even causing collision damage between the drill bit and the workpiece. When machining small workpieces, the fixture cannot accurately descend to the appropriate height, increasing the difficulty of operation and machining errors. At the same time, most fixtures have defects in workpiece positioning and clamping, making it difficult to achieve fast, accurate, and stable positioning. This causes the workpiece to easily shift and wobble during drilling, resulting in quality problems such as hole position deviation and inconsistent hole diameter. This not only reduces machining efficiency and increases the defect rate, but may also damage the workpiece surface due to repeated clamping and adjustment, increasing production costs. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a quick-positioning fixture for CNC drilling machines, featuring flexible adjustable lifting and precise positioning and clamping. Through its lifting mechanism, this invention allows for flexible adjustment of the lifting plate height, ensuring a stable and precise lifting process to meet different processing height requirements. Furthermore, through a limiting mechanism, the push plate can precisely position and clamp the workpiece on the worktable, achieving rapid, accurate, and stable workpiece positioning, thereby improving processing efficiency and quality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick positioning fixture for a CNC drilling machine, comprising a base plate, a platform fixedly mounted on the upper surface of the base plate, a lifting mechanism fixedly mounted on the upper surface of the base plate, a limiting mechanism fixedly mounted on one side of the lifting mechanism, the lifting mechanism comprising a lifting base, the lifting base being in contact with the upper surface of the base plate, a lifting frame fixedly mounted on the upper surface of the lifting base, a lifting screw rotatably mounted on one side of the lifting frame, a lifting plate slidably mounted on the inner side of the lifting frame, and lifting rods fixedly mounted on both sides of the lifting plate, one end of one lifting rod being threadedly engaged with the lifting screw, and a fastening nut being threadedly fitted onto one end of the other lifting rod.

[0007] Preferably, the limiting mechanism includes a limiting frame, which is fixed to the inner side of the lifting plate. A sliding rod is slidably provided on one side of the limiting frame. A push plate is fixedly provided at one end of the sliding rod, and a sliding plate is fixedly provided at one end of the sliding rod. A moving screw is rotatably provided on one side of the sliding plate, and a knob is fixedly provided at one end of the moving screw.

[0008] Preferably, the upper surface of the base plate has a plurality of fixing holes distributed at equal intervals, and the fixing holes are fixedly engaged with the lifting base.

[0009] Preferably, lifting slots are provided on both sides of the lifting plate, and the lifting slots slide against the inner wall of one side of the lifting frame.

[0010] Preferably, the lifting frame has sliding grooves on both sides, and the inner side of the sliding grooves slides in contact with the lifting rod.

[0011] Preferably, an anti-slip pad is fixedly provided on one side of the push plate.

[0012] Preferably, a fastening bolt is inserted on one side of the limiting frame.

[0013] Preferably, the outer side of the knob is provided with multiple anti-slip textures distributed in a ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model can flexibly adjust the height of the lifting plate through the lifting mechanism, and the lifting rod, together with the sliding groove and the lifting grooves on both sides of the lifting plate, slides and fits in close contact with the lifting frame to ensure a stable and accurate lifting process and meet the needs of different processing heights.

[0016] 2. This utility model uses a limiting mechanism to enable the push plate to accurately position and clamp the workpiece on the platform, achieving rapid, accurate, and stable positioning of the workpiece and improving processing efficiency and quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the lifting mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the rear of the lifting mechanism structure of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the limiting mechanism of this utility model.

[0021] In the diagram: 1. Base plate; 2. Lifting mechanism; 3. Limiting mechanism; 4. Display platform; 5. Fixing hole; 20. Lifting base; 21. Lifting frame; 22. Lifting plate; 23. Lifting rod; 24. Lifting groove; 25. Lifting screw; 26. Fastening nut; 27. Slide groove; 30. Limiting frame; 31. Sliding rod; 32. Sliding plate; 33. Anti-slip texture; 34. Knob; 35. Moving screw; 36. Push plate; 37. Anti-slip pad; 38. Fastening bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4As shown, this utility model provides a quick positioning fixture for a CNC drilling machine, including a base plate 1. A platform 4 is fixedly mounted on the upper surface of the base plate 1. A lifting mechanism 2 is fixedly mounted on the upper surface of the base plate 1. A limiting mechanism 3 is fixedly mounted on one side of the lifting mechanism 2. The lifting mechanism 2 includes a lifting base 20, which is in contact with the upper surface of the base plate 1. A lifting frame 21 is fixedly mounted on the upper surface of the lifting base 20. A lifting screw 25 is rotatably mounted on one side of the lifting frame 21. A lifting plate 22 is slidably mounted on the inner side of the lifting frame 21. Lifting rods 23 are fixedly mounted on both sides of the lifting plate 22. One end of one lifting rod 23 is threadedly engaged with the lifting screw 25, and one end of the other lifting rod 23 is threadedly fitted with a fastening nut 26. The operator can then... According to the height requirements of the workpiece to be processed, the lifting screw 25 is first rotated. Since one of the lifting rods 23 is threadedly engaged with the lifting screw 25, under the action of the thread, the lifting rod 23 drives the lifting plate 22 to slide along the inner side of the lifting frame 21. At the same time, the lifting grooves 24 on both sides of the lifting plate 22 slide against the inner wall of one side of the lifting frame 21 to ensure the stability of the lifting plate 22. The sliding grooves 27 on both sides of the lifting frame 21 slide against the lifting rod 23 to further assist the smooth movement of the lifting rod 23. When the lifting plate 22 moves to the appropriate height, the fastening nut 26 threaded on one end of the other lifting rod 23 is tightened to fix the lifting plate 22 at the current height, thereby completing the height adjustment of the lifting mechanism 2 to adapt to workpieces with different processing heights.

[0024] Specifically, the limiting mechanism 3 includes a limiting frame 30, which is fixed to the inner side of the lifting plate 22. A sliding rod 31 is slidably provided on one side of the limiting frame 30. A push plate 36 is fixed to one end of the sliding rod 31, and a sliding plate 32 is fixed to the other end. A moving screw 35 is rotatably provided on one side of the sliding plate 32, and a knob 34 is fixed to one end of the moving screw 35. The workpiece to be processed is placed on the platform 4, and the operator rotates the knob 34. The knob 34 drives the moving screw 35 to rotate. Since the moving screw 35 is rotatably connected to one side of the sliding plate 32, under the action of threaded transmission, the sliding plate 32 drives the sliding rod 31 to slide on one side of the limiting frame 30, thereby pushing the push plate 36 to move towards the workpiece until the anti-slip pad 37 on one side of the push plate 36 is in close contact with the workpiece, thus clamping and positioning the workpiece. If further tightening of the limiting is required, the fastening bolt 38 on one side of the limiting frame 30 can be inserted to prevent the workpiece from shifting during processing.

[0025] Furthermore, multiple equally spaced fixing holes 5 are provided on the upper surface of the base plate 1, which are fixedly engaged with the lifting base 20. The installation position of the lifting base 20 on the base plate 1 can be flexibly adjusted, so that the position of the lifting mechanism 2 on the base plate 1 can be reasonably arranged according to different workpiece shapes, sizes and processing requirements, so that the fixture can be adapted to more diverse processing scenarios and improve the versatility and flexibility of the fixture.

[0026] Furthermore, the lifting grooves 24 on both sides of the lifting plate 22 slide against the inner wall of one side of the lifting frame 21. This design ensures that the lifting plate 22 slides stably along the inner wall of one side of the lifting frame 21 during the lifting process, effectively avoiding problems such as shaking or deviation of the lifting plate 22 during the lifting process. This ensures the stability and accuracy of the lifting plate 22, thereby ensuring that the fixture can accurately reach the required position when the height is adjusted, meeting the accuracy requirements of different processing heights.

[0027] It is worth noting that the sliding grooves 27 on both sides of the lifting frame 21 slide in close contact with the lifting rod 23. On the one hand, this provides a clear track for the sliding of the lifting rod 23, enabling it to maintain linear movement during lifting and preventing it from swaying left and right, thus enhancing the stability of the lifting rod 23's movement. On the other hand, the close contact between the sliding grooves 27 and the lifting rod 23 reduces the gap between the lifting rod 23 and the lifting frame 21, reducing the shaking and errors caused by the gap, and further improving the stability and accuracy of the lifting mechanism 2 during height adjustment.

[0028] It is worth noting that the anti-slip pad 37 fixedly installed on one side of the push plate 36 can increase the friction between the push plate 36 and the workpiece when the push plate 36 clamps and positions the workpiece, preventing the workpiece from sliding or shifting due to the cutting force of the drill bit during processing. This ensures that the workpiece always maintains a stable position during processing, improves processing accuracy and quality, and reduces the defect rate caused by workpiece movement.

[0029] It is worth mentioning that the fastening bolt 38 inserted on one side of the limit frame 30 can further fix the position of the sliding rod 31 after the push plate 36 clamps and positions the workpiece. This prevents the sliding rod 31 from loosening due to vibration or other factors during processing, which would reduce the clamping force of the push plate 36 on the workpiece. As a result, the workpiece is always in a stable and accurate positioning state throughout the entire processing, improving the reliability and stability of the processing.

[0030] It is worth emphasizing that the multiple ring-shaped anti-slip grooves 33 on the outer side of the knob 34 increase the friction between the operator's hand and the knob 34 when the operator rotates the knob 34 to drive the moving screw 35 to rotate and adjust the position of the push plate 36. This allows the operator to rotate the knob 34 more easily and accurately, avoiding operational errors caused by hand slippage, improving the convenience and accuracy of operation, and thus enhancing the user experience and positioning efficiency of the fixture.

[0031] Working principle: According to the height requirements of the workpiece to be processed, the operator first rotates the lifting screw 25. Since one of the lifting rods 23 is threadedly engaged with the lifting screw 25, under the action of the thread, the lifting rod 23 drives the lifting plate 22 to slide along the inner side of the lifting frame 21. At the same time, the lifting grooves 24 on both sides of the lifting plate 22 slide against the inner wall of one side of the lifting frame 21 to ensure the stability of the lifting plate 22. The sliding grooves 27 on both sides of the lifting frame 21 slide against the lifting rod 23 to further assist the smooth movement of the lifting rod 23. When the lifting plate 22 moves to the appropriate height, tighten the fastening nut 26 threaded on one end of the other lifting rod 23 to fix the lifting plate 22 at the current height, thereby completing the height adjustment of the lifting mechanism 2 to adapt to workpieces with different processing heights.

[0032] The workpiece to be processed is placed on the platform 4. The operator rotates the knob 34, which drives the moving screw 35 to rotate. Since the moving screw 35 is rotatably connected to one side of the sliding plate 32, under the action of threaded transmission, the sliding plate 32 drives the sliding rod 31 to slide on one side of the limit frame 30, thereby pushing the push plate 36 to move towards the workpiece until the anti-slip pad 37 on one side of the push plate 36 is in close contact with the workpiece, thus clamping and positioning the workpiece. If further tightening of the limit is required, the fastening bolt 38 on one side of the limit frame 30 can be inserted to prevent the workpiece from shifting during processing.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick positioning fixture for numerical control drilling machine comprising a base plate (1), characterized in that: A platform (4) is fixedly provided on the upper surface of the base plate (1), a lifting mechanism (2) is fixedly provided on the upper surface of the base plate (1), and a limiting mechanism (3) is fixedly provided on one side of the lifting mechanism (2). The lifting mechanism (2) includes a lifting base (20), which is attached to the upper surface of the base plate (1). A lifting frame (21) is fixedly provided on the upper surface of the lifting base (20). A lifting screw (25) is rotatably provided on one side of the lifting frame (21). A lifting plate (22) is slidably provided on the inner side of the lifting frame (21). Lifting rods (23) are fixedly provided on both sides of the lifting plate (22). One end of one lifting rod (23) is threadedly engaged with the lifting screw (25), and a fastening nut (26) is threadedly fitted on one end of the other lifting rod (23).

2. The quick positioning fixture for numerical control drilling machine according to claim 1, characterized in that: The limiting mechanism (3) includes a limiting frame (30), which is fixed to the inner side of the lifting plate (22). A sliding rod (31) is slidably provided on one side of the limiting frame (30). A push plate (36) is fixedly provided at one end of the sliding rod (31). A sliding plate (32) is fixedly provided at one end of the sliding rod (31). A moving screw (35) is rotatably provided on one side of the sliding plate (32). A knob (34) is fixedly provided at one end of the moving screw (35).

3. The quick positioning fixture for numerical control drilling machine according to claim 1, characterized in that: The upper surface of the base plate (1) is provided with a plurality of fixing holes (5) that are equally spaced apart, and the fixing holes (5) are fixedly engaged with the lifting base (20).

4. The quick positioning fixture for numerical control drilling machine according to claim 1, characterized in that: The lifting plate (22) has lifting grooves (24) on both sides, and the lifting grooves (24) slide against the inner wall of one side of the lifting frame (21).

5. The quick positioning fixture for numerical control drilling machine according to claim 1, characterized in that: The lifting frame (21) has sliding grooves (27) on both sides, and the inner side of the sliding grooves (27) slides against the lifting rod (23).

6. The quick positioning fixture for numerical control drilling machine according to claim 2, characterized in that: An anti-slip pad (37) is fixedly provided on one side of the push plate (36).

7. The quick positioning fixture for numerical control drilling machine according to claim 2, characterized in that: A fastening bolt (38) is inserted into one side of the limiting frame (30).

8. The quick positioning fixture for numerical control drilling machine according to claim 2, characterized in that: The knob (34) has multiple anti-slip textures (33) arranged in a ring on the outside.

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