A positioning jig for a fine carving machine

Abstract

The utility model discloses a positioning jig for precision carving machine, including locating plate, the sliding groove in the upper surface of locating plate all has the sliding connection of locating clamping plate, including adjusting mechanism, adjusting mechanism: it includes screw rod, threaded tube, internal thread ring, limit ring and limit frame, the inside of locating plate is rotatively connected respectively to screw rod, and the outer camber of screw rod all is connected with threaded tube in screw, and the outer camber of threaded tube all is connected with internal thread ring in screw, and the lower extreme of locating clamping plate is fixedly connected with the outer camber of adjacent internal thread ring respectively, this positioning jig for precision carving machine, through the limiting state of threaded tube is switched, the moving speed of locating clamping plate is switched in the locating clamping plate position adjusting process conveniently, makes the adjustment accuracy of locating clamping plate higher while reducing the time required for locating clamping plate adjustment, improves the accuracy of precision carving workpiece positioning, guarantees the processing quality of precision carving machine.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, specifically a positioning fixture for a precision engraving machine. Background Technology

[0002] A positioning fixture for a CNC engraving machine is a specialized clamping device used to fix and precisely position workpieces, such as touch panels, glass, or semiconductor materials, on a CNC engraving machine, ensuring positional accuracy and repeatability during processing. It solves the alignment problem in micron-level machining by working collaboratively with physical constraints and a vision system. In the prior art, patent publication number CN221582433 U proposes a positioning fixture for a CNC engraving machine, comprising: a placement stage with mounting slots arranged in a ring around its central axis on the outer side; and a rotating frame installed on the placement stage at the position corresponding to the mounting slots. While this fixture can position the workpiece, the movement speed of the positioning components is constant during positioning, making it impossible to simultaneously guarantee movement speed and adjustment accuracy, easily leading to excessively long positioning times or low positioning accuracy. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a positioning fixture for a precision engraving machine. While reducing the time required for adjusting the positioning clamp, it also makes the adjustment accuracy of the positioning clamp higher, improves the accuracy of positioning of the precision engraving workpiece, and ensures the processing quality of the precision engraving machine. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for a precision engraving machine, comprising a positioning plate, wherein positioning clamps are slidably connected in the grooves on the upper surface of the positioning plate, and including an adjustment mechanism;

[0005] Adjustment mechanism: It includes a screw, a threaded tube, an internal threaded ring, a limiting ring, and a limiting frame. The screw is rotatably connected to the inside of the positioning plate. The outer arc surface of the screw is threaded with a threaded tube, and the outer arc surface of the threaded tube is threaded with an internal threaded ring. The lower end of the positioning clamp is fixedly connected to the outer arc surface of the adjacent internal threaded ring. The ends of the internal threaded ring and the threaded tube are provided with limiting rings. The outer arc surface of the threaded tube is rotatably connected to the limiting frame. By switching the limiting state of the threaded tube, it is convenient to switch the moving speed of the positioning clamp during the position adjustment of the positioning clamp. While reducing the time required for positioning clamp adjustment, it makes the adjustment accuracy of the positioning clamp higher, improves the accuracy of the precision engraving workpiece positioning, and ensures the processing quality of the precision engraving machine.

[0006] Furthermore, it also includes a microcontroller, which is located on the front side of the positioning plate. The input terminal of the microcontroller is electrically connected to an external power supply to control the start and stop of the overall device.

[0007] Furthermore, the adjustment mechanism also includes a U-shaped sliding plate and a locking plate. The U-shaped sliding plate is vertically slidably connected to the vertical holes on the surface of the horizontal plate of the limiting frame. A locking plate is provided between the upper ends of the two vertical plates of the U-shaped sliding plate. The locking plate is installed in conjunction with the locking groove on the outer arc surface of the limiting ring to restrict the relative rotation of the threaded tube and the inner threaded ring.

[0008] Furthermore, the adjustment mechanism also includes insertion posts and insertion holes. The insertion posts are respectively disposed on the lower surface of the U-shaped sliding plate, and the insertion holes are respectively disposed on the surface of the lower end support plate inside the positioning plate, thereby restricting the relative rotation of the threaded tube and the screw.

[0009] Furthermore, the lower surface of the limiting frame is provided with electric push rods, the lower end of the telescopic end of the electric push rod is provided with a connecting plate, the lower surface of the connecting plate is provided with sliding columns, the sliding columns are vertically slidably connected to the sliding holes on the surface of the U-shaped sliding plate, the limiting plate at the lower end of the sliding column is provided with a spring between it and the U-shaped sliding plate, the springs are respectively movably sleeved on the outer arc surface of the sliding column, and the input end of the electric push rod is electrically connected to the output end of the microcontroller to adjust the up and down position of the U-shaped sliding plate.

[0010] Furthermore, each of the positioning clamps is provided with a baffle in the middle, the lower surface of the baffle is attached to the upper surface of the positioning plate, and the baffle is installed in conjunction with the sliding groove on the surface of the positioning plate to prevent external dust from entering the interior of the positioning plate through the sliding groove.

[0011] Furthermore, each of the positioning plates is equipped with a motor, the output shaft of which is fixedly connected to the end of the screw. The vertical plate surface along the outer edge of the positioning plate is equipped with a distance sensor, which corresponds to and is installed in conjunction with the positioning clamp. The input end of each motor is electrically connected to the output end of the microcontroller, and the output end of the distance sensor is electrically connected to the input end of the microcontroller to control the rotation of the screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This positioning fixture for a precision engraving machine has the following advantages:

[0013] By switching the limit state of the threaded tube, it is convenient to switch the moving speed of the positioning clamp during the position adjustment process. This reduces the time required for positioning clamp adjustment, while also increasing the adjustment accuracy of the positioning clamp, improving the accuracy of the precision engraving workpiece positioning, and ensuring the processing quality of the precision engraving machine. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural schematic diagram of the overall device of this utility model, viewed from the front cross-section.

[0016] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the adjusting mechanism of this utility model.

[0018] In the diagram: 1. Positioning plate, 2. Positioning clamp, 3. Adjustment mechanism, 31. Screw, 32. Threaded tube, 33. Internal threaded ring, 34. Limiting ring, 35. Limiting frame, 36. U-shaped sliding plate, 37. Card plate, 38. Insertion post, 39. Insertion hole, 4. Electric push rod, 5. Sliding column, 6. Baffle, 7. Motor, 8. Distance sensor, 9. Microcontroller. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This embodiment provides a technical solution: a positioning fixture for a precision engraving machine, including a positioning plate 1, which provides support for the setting of positioning components. Positioning clamps 2 are slidably connected in the grooves on the upper surface of the positioning plate 1. According to the size of the precision engraving workpiece, the four positioning clamps 2 are moved to a designated position. Under the obstruction of the positioning clamps 2, the horizontal position of the workpiece is positioned, including an adjustment mechanism 3.

[0021] Adjustment mechanism 3: It includes screw 31, threaded tube 32, internal threaded ring 33, limiting ring 34 and limiting frame 35. Screw 31 is rotatably connected to the inside of positioning plate 1. The outer arc surface of screw 31 is threaded with threaded tube 32. The outer arc surface of threaded tube 32 is threaded with internal threaded ring 33. The lower end of positioning clamp 2 is fixedly connected to the outer arc surface of adjacent internal threaded ring 33. The ends of internal threaded ring 33 and threaded tube 32 are provided with limiting ring 34. The outer arc surface of threaded tube 32 is rotatably connected with limiting frame 35.

[0022] When the relative rotation of the internal threaded ring 33 and the threaded tube 32 is restricted, the rotation of the screw 31 will cause relative rotation with the threaded tube 32, driving the threaded tube 32 to move closer to the workpiece. When the relative rotation restriction between the threaded tube 32 and the internal threaded ring 33 is removed, and the rotation of the limiting frame 35 is restricted, the horizontal position of the threaded tube 32 is restricted through the rotational connection between the limiting frame 35 and the threaded tube 32, thereby restricting the relative rotation between the threaded tube 32 and the screw 31. At this time, the rotation of the screw 31 will drive the threaded tube 32 to rotate synchronously. Through the threaded connection between the threaded tube 32 and the internal threaded ring 33, the internal threaded ring 33 drives the positioning clamp 2 to continue to move. The lead of the internal thread of the threaded tube 32 is twice that of the external thread of the threaded tube 32, which can drive the positioning clamp 2 to make more accurate adjustments.

[0023] It also includes a microcontroller 9, which is located on the front side of the positioning plate 1. The input terminal of the microcontroller 9 is electrically connected to an external power supply to control the start and stop of the entire device. In actual use, the microcontroller 9 can be installed inside the electrical control box of the engraving machine.

[0024] The adjustment mechanism 3 also includes a U-shaped slide plate 36 and a locking plate 37. The U-shaped slide plate 36 is vertically slidably connected to the vertical holes on the surface of the horizontal plate of the limiting frame 35. A locking plate 37 is provided between the upper ends of the two vertical plates of the U-shaped slide plate 36. The locking plate 37 is installed in conjunction with the locking groove on the outer arc surface of the limiting ring 34. The vertical sliding of the U-shaped slide plate 36 and the limiting frame 35 drives the locking plate 37 to move up and down. When the locking plate 37 is engaged with the locking groove on the outer arc surface of the limiting ring 34, the relative rotation of the threaded tube 32 and the inner threaded ring 33 is restricted. When the locking plate 37 leaves the inside of the locking groove, the relative rotation restriction of the threaded tube 32 and the inner threaded ring 33 is released.

[0025] The adjustment mechanism 3 also includes a pin 38 and a hole 39. The pins 38 are respectively set on the lower surface of the U-shaped slide plate 36, and the holes 39 are respectively set on the surface of the lower end support plate inside the positioning plate 1. When the U-shaped slide plate 36 drives the pins 38 to move up and down, when the locking plate 37 engages with the slot on the outer arc surface of the limiting ring 34, the pins 38 leave the inside of the hole 39. When the locking plate 37 leaves the inside of the slot, the pins 38 engage with the adjacent hole 39, restricting the rotation of the limiting frame 35.

[0026] The lower surface of the limiting frame 35 is provided with electric push rods 4. The lower end of the telescopic end of the electric push rod 4 is provided with a connecting plate. The lower surface of the connecting plate is provided with sliding columns 5. The sliding columns 5 are vertically slidably connected to the sliding holes on the surface of the U-shaped slide plate 36. The limiting plate at the lower end of the sliding column 5 and the U-shaped slide plate 36 are provided with springs. The springs are movably sleeved on the outer arc surface of the sliding column 5. The input end of the electric push rod 4 is electrically connected to the output end of the microcontroller 9.

[0027] When the electric push rod 4 is activated, its telescopic end pushes the U-shaped slide plate 36 downwards. When the insertion post 38 and the insertion hole 39 are vertically misaligned, the telescopic end of the electric push rod 4 pushes the sliding post 5 downwards, causing the spring to extend and generate elastic force. As the threaded tube 32 moves, when the insertion post 38 and the insertion hole 39 vertically coincide, the elastic force of the spring applies a downward force to the U-shaped slide plate 36, causing the insertion post 38 to insert into the insertion hole 39. At the same time, the retaining plate 37 leaves the retaining groove on the outer arc surface of the limiting ring 34. Similarly, when the telescopic end of the electric push rod 4 retracts... Through the elastic connection of the spring, the card plate 37 is smoothly inserted into the slot on the outer arc surface of the limiting ring 34. The electric push rod 4 moves at a fixed stroke through its built-in limit switch. The vertical sliding of the U-shaped slide plate 36 and the limiting frame 35 provides guidance and support for the extension and retraction of the electric push rod 4, avoiding radial force on the extension end of the electric push rod 4 which is easily damaged. The ends of the springs are detachably connected to the slide column 5 and the U-shaped slide plate 36 respectively through connecting bolts. The connecting bolts are rotated periodically to disassemble the springs for replacement or maintenance, avoiding the impact of aging and corrosion on the normal operation of the springs.

[0028] Each positioning clamp 2 is provided with a baffle 6 in the middle. The lower surface of the baffle 6 is in contact with the upper surface of the positioning plate 1. The baffle 6 is installed in conjunction with the sliding groove on the surface of the positioning plate 1. During the movement of the positioning clamp 2, the baffle 6 always blocks the sliding groove on the surface of the positioning plate 1 to prevent external dust from entering the interior of the positioning plate 1 through the sliding groove, thus ensuring the normal operation of transmission components such as screw 31, threaded tube 32 and internal threaded ring 33.

[0029] The positioning plate 1 is equipped with a motor 7 inside. The output shaft of the motor 7 is fixedly connected to the end of the screw 31. The vertical plate surface of the outer edge of the positioning plate 1 is equipped with a distance sensor 8. The distance sensor 8 corresponds to the positioning clamp 2 and is installed in a matching manner. The input end of the motor 7 is electrically connected to the output end of the microcontroller 9. The output end of the distance sensor 8 is electrically connected to the input end of the microcontroller 9. The motor 7 provides power for the rotation of the screw 31. The distance sensor 8 detects the distance between the vertical plate of the positioning plate 1 and the positioning clamp 2, and determines the moving distance of the positioning clamp 2.

[0030] The working principle of the positioning fixture for a precision engraving machine provided by this utility model is as follows: In use, the positioning fixture is installed on the worktable surface of the precision engraving machine. When positioning the workpiece is required, the workpiece is placed on the upper surface of the positioning plate 1. After inputting the workpiece's dimensional data into the microcontroller 9, the microcontroller 9 controls the motor 7 to start based on the input data. The output shaft of the motor 7 drives the screw 31 to rotate. At this time, the electric push rod 4 is in a retracted state, and the clamping plate 37 engages with the groove on the outer arc surface of the limiting ring 34, restricting the inner threaded ring 33 and the threaded tube 32. The relative rotation is restricted by the sliding groove on the surface of the positioning plate 1, which restricts the rotation of the positioning clamp 2, and thus restricts the rotation of the internal threaded ring 33 fixedly connected to the lower end of the positioning clamp 2. The screw 31 will rotate relative to the threaded tube 32, driving the threaded tube 32 to move closer to the workpiece. During the movement, the distance moving by the distance sensor 8 is measured. When the positioning clamp 2 reaches the designated position, the positioning clamp 2 stops moving. By cooperating with the four positioning clamps 2, the horizontal position of the workpiece is positioned. At a fixed distance, the electric push rod 4 is activated. The telescopic end of the electric push rod 4 pushes the U-shaped slide plate 36 downward. When the insertion post 38 and the insertion hole 39 are vertically misaligned, the telescopic end of the electric push rod 4 will push the sliding post 5 downward, pulling the spring to extend and generate elastic force. As the threaded tube 32 moves, when the insertion post 38 and the insertion hole 39 are vertically aligned, the elastic force of the spring applies a downward force to the U-shaped slide plate 36, causing the insertion post 38 to insert into the insertion hole 39. At the same time, the retaining plate 37 leaves the retaining groove on the outer arc surface of the limiting ring 34, canceling the threaded tube 32 and the internal threaded ring 33. The relative rotation is restricted, and the rotation of the limiting frame 35 is also restricted. The horizontal position of the threaded tube 32 is restricted through the rotational connection between the limiting frame 35 and the threaded tube 32, thereby restricting the relative rotation between the threaded tube 32 and the screw 31. At this time, the rotation of the screw 31 will drive the threaded tube 32 to rotate synchronously. Through the threaded connection between the threaded tube 32 and the internal threaded ring 33, the internal threaded ring 33 drives the positioning clamp 2 to continue to move. The lead of the internal thread of the threaded tube 32 is twice that of the external thread of the threaded tube 32, which can drive the positioning clamp 2 to make more accurate adjustments.

[0031] It is worth noting that the microcontroller 9 disclosed in the above embodiments can be a PIC16F1823-I / P model microcontroller. The electric actuator 4, motor 7 and ranging sensor 8 can be freely configured according to the actual application scenario. The electric actuator 4 can be a LAM1 model electric actuator, the motor 7 can be a 3M57-42A model stepper motor, and the ranging sensor 8 can be a T150HJG-CGQ model reflective laser ranging sensor. The microcontroller 9 controls the operation of the electric actuator 4, motor 7 and ranging sensor 8 using methods commonly used in the prior art.

[0032] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning fixture for a precision engraving machine, comprising a positioning plate (1), wherein positioning clamps (2) are slidably connected in grooves on the upper surface of the positioning plate (1), characterized in that: Including the regulating mechanism (3); Adjustment mechanism (3): It includes a screw (31), a threaded tube (32), an internal threaded ring (33), a limiting ring (34), and a limiting frame (35). The screw (31) is rotatably connected to the inside of the positioning plate (1). The outer arc surface of the screw (31) is threaded with the threaded tube (32). The outer arc surface of the threaded tube (32) is threaded with the internal threaded ring (33). The lower end of the positioning clamp (2) is fixedly connected to the outer arc surface of the adjacent internal threaded ring (33). The ends of the internal threaded ring (33) and the threaded tube (32) are provided with limiting rings (34). The outer arc surface of the threaded tube (32) is rotatably connected with the limiting frame (35).

2. A positioning fixture for a precision engraving machine according to claim 1, characterized in that: It also includes a microcontroller (9), which is located on the front side of the positioning plate (1), and the input terminal of the microcontroller (9) is electrically connected to an external power supply.

3. A positioning fixture for a precision engraving machine according to claim 2, characterized in that: The adjustment mechanism (3) also includes a U-shaped slide plate (36) and a locking plate (37). The U-shaped slide plate (36) is vertically slidably connected to the vertical holes on the surface of the horizontal plate of the limiting frame (35). A locking plate (37) is provided between the upper ends of the two vertical plates of the U-shaped slide plate (36). The locking plate (37) is installed in conjunction with the slot on the outer arc surface of the limiting ring (34).

4. A positioning fixture for a precision engraving machine according to claim 3, characterized in that: The adjustment mechanism (3) also includes a pin (38) and a hole (39). The pin (38) is respectively set on the lower surface of the U-shaped slide plate (36) and the hole (39) is respectively set on the surface of the lower end support plate inside the positioning plate (1).

5. A positioning fixture for a precision engraving machine according to claim 3, characterized in that: The lower surface of the limiting frame (35) is provided with electric push rods (4), the lower end of the telescopic end of the electric push rod (4) is provided with a connecting plate, the lower surface of the connecting plate is provided with sliding columns (5), the sliding columns (5) are vertically slidably connected to the sliding holes on the surface of the U-shaped sliding plate (36), the limiting plate at the lower end of the sliding column (5) and the U-shaped sliding plate (36) are provided with springs, the springs are movably sleeved on the outer arc surface of the sliding column (5), and the input end of the electric push rod (4) is electrically connected to the output end of the microcontroller (9).

6. A positioning fixture for a precision engraving machine according to claim 1, characterized in that: Each of the positioning clamps (2) is provided with a baffle (6) in the middle. The lower surface of the baffle (6) is attached to the upper surface of the positioning plate (1). The baffle (6) is installed in conjunction with the sliding groove on the surface of the positioning plate (1).

7. A positioning fixture for a precision engraving machine according to claim 2, characterized in that: The positioning plate (1) is equipped with a motor (7) inside. The output shaft of the motor (7) is fixedly connected to the end of the screw (31). The vertical plate surface of the outer edge of the positioning plate (1) is equipped with a distance sensor (8). The distance sensor (8) corresponds to the positioning clamp (2) and is installed in a matching manner. The input end of the motor (7) is electrically connected to the output end of the microcontroller (9). The output end of the distance sensor (8) is electrically connected to the input end of the microcontroller (9).

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