Angle-adjustable special fixture for numerical control lathe
By designing an adjustable-angle CNC lathe fixture, the problem of traditional fixtures being unable to adjust angles was solved, enabling rapid and precise adjustment of workpiece angles and improving production efficiency and machining accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ONE NINE SEVEN FOUR VEHICLE MFG CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional CNC lathe fixtures cannot be angled, which means that when drilling inclined holes in workpieces on vertical lathes, special fixtures need to be redesigned and manufactured, increasing production costs and time, and easily leading to the accumulation of positioning errors, affecting machining accuracy and product quality.
A fixture comprising a base, a rotating shell, a disc, and a fixing mechanism was designed. The workpiece angle is adjusted by rotating the disc within the rotating shell. Combined with a positioning mechanism and scale lines, the precise positioning and adjustment of the angle are ensured.
It enables easy adjustment of the workpiece machining angle, improves the versatility and applicability of the fixture, reduces adjustment time, and improves production efficiency and machining accuracy.
Smart Images
Figure CN224526610U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fixture equipment technology, specifically a special fixture for CNC lathes with adjustable angle. Background Technology
[0002] In CNC lathe machining, fixtures are key components that ensure the correct installation and positioning of workpieces, and their performance directly affects machining accuracy, efficiency and product quality.
[0003] Lathes are often used for drilling workpieces. When drilling holes on a vertical lathe, appropriate fixtures are needed. A search revealed Chinese patent application CN202111589655.3, which discloses a high-stability lathe positioning fixture. This fixture is characterized by comprising an upper pressure ring, a lower pressure ring, a rubber layer, an upper locking plate, a lower locking plate, a sliding block, an arc support, and lifting rings. Lifting rings are welded to the left and right ends of the top of the arc support. A lower pressure ring is located at the top of the arc support. Lower locking plates are integrally formed at the left and right ends of the lower pressure ring, and slots are formed inside the lower pressure plates. An upper pressure ring is located at the upper end of the lower pressure ring. Upper locking plates are integrally formed at the left and right ends of the upper pressure ring. A T-shaped sliding block is rotatably connected to the bottom of the upper locking plate. T-shaped grooves are formed at the left and right ends of the top of the arc support.
[0004] The above-mentioned technical solutions and traditional fixtures still have defects. For example, they cannot be adjusted in angle. When making inclined holes in workpieces on vertical lathes, it is difficult to meet the processing requirements. Often, it is necessary to redesign and manufacture special fixtures or achieve this by clamping and adjusting the workpiece position multiple times. This not only increases production costs and production cycle, but also easily leads to the accumulation of positioning errors due to multiple clamping, which reduces processing accuracy and affects the stability of product quality.
[0005] Therefore, we need to propose a special fixture for CNC lathes with adjustable angle. Utility Model Content
[0006] The purpose of this utility model is to provide a CNC lathe-specific fixture with adjustable angle, which can easily realize the adjustment of the workpiece machining angle without redesigning and manufacturing a special fixture. This effectively solves the shortcomings of traditional fixtures and greatly improves the versatility and applicability of the fixture, thereby solving the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] An angle-adjustable fixture for CNC lathes, comprising:
[0009] The base is fixed to the lathe machining area by fixing screws, and a semi-circular rotating shell is provided on the base;
[0010] The disc is rotatably mounted inside the rotating shell, and a shaft is provided at the center of both sides of the disc, which is rotatably mounted at the center of both sides of the rotating shell.
[0011] A fixing mechanism is provided on the top of the disc for clamping and fixing the workpiece. The fixing mechanism includes a fixing seat, and handles on both sides of the fixing seat are provided for rotating the disc to adjust the processing angle of the workpiece.
[0012] Preferably, the fixing seat has a U-shaped design, with handles located on the outer walls of the two arms of the fixing seat. A hydraulic cylinder is installed on one outer wall of the fixing seat, and the hydraulic rod of the hydraulic cylinder passes through the fixing seat and is connected to a clamping block. The clamping block and the inner wall of the other side of the fixing seat cooperate to clamp and fix the workpiece.
[0013] Preferably, one side wall of the clamping block and the other inner wall of the fixing seat are both fixed with rubber pads by bolts, and the rubber pads are provided with countersunk holes for installing bolts.
[0014] Preferably, it also includes a positioning mechanism for positioning the processing angle, which is disposed at the end of the shaft of the disc. The positioning mechanism includes a swing arm, an L-shaped plate and a positioning rod. The L-shaped plate is disposed at the end of the swing arm and the positioning rod is inserted into the end of the swing arm and the L-shaped plate.
[0015] Preferably, the positioning rod includes a threaded rod, a stop block, and a connecting rod. The stop block is located between the connecting rod and the threaded rod, and between the L-shaped plate and the swing arm. The threaded rod is threadedly installed at the end of the swing arm. The connecting rod is slidably inserted into the L-shaped plate, and a knob is provided at one end of the connecting rod outside the L-shaped plate. A compression spring is sleeved on the stop block between the stop block and the L-shaped plate.
[0016] Preferably, multiple sets of positioning holes are equidistantly arranged around both sides of the rotating shell. The positioning holes correspond to the threaded rod. After the disc is rotated to adjust the angle, the knob is rotated to insert the threaded rod into the corresponding positioning hole, thereby positioning the angle. At the same time, the compression spring squeezes the stop block to fit against the swing arm to prevent the threaded rod from loosening.
[0017] Preferably, scale lines are arranged around both sides of the rotating shell, with each set of scale lines corresponding to each set of positioning holes, and the lowest scale line is 0 degrees, while the scale lines on both sides are positive and negative angles respectively.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. The workpiece machining angle can be easily adjusted by rotating the disc inside the rotating shell without redesigning and manufacturing a special fixture. This effectively solves the shortcomings of traditional fixtures and greatly improves the versatility and applicability of the fixture.
[0020] 2. The handles on both sides of the fixed base allow operators to easily adjust the workpiece machining angle by directly rotating the disc. The operation is simple and intuitive, requiring no complicated procedures or professional skills. It can quickly complete the angle adjustment, saving adjustment time and improving production efficiency.
[0021] 3. The positioning mechanism design enables precise positioning of the disc after rotation and angle adjustment. By rotating the knob, the threaded rod is inserted into the corresponding positioning hole on the rotating shell. With the help of the scale lines surrounding both sides of the rotating shell, the operator can accurately adjust the workpiece to the required processing angle. Each set of scale lines corresponds one-to-one with each set of positioning holes, facilitating rapid positioning, reducing angle adjustment errors, and improving processing accuracy. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the rotating shell of this utility model;
[0024] Figure 3 This is a schematic diagram of the structure of the disc of this utility model;
[0025] Figure 4 This is a schematic diagram of the structure of the fixing base of this utility model;
[0026] Figure 5 This is a schematic diagram of the structure of the L-shaped plate of this utility model.
[0027] In the diagram: 1. Base; 2. Rotating shell; 3. Disc; 4. Fixed seat; 5. Hydraulic cylinder; 6. Clamping block; 7. Rubber pad; 8. Slide groove; 9. Slider; 10. Scale line; 11. Positioning hole; 12. Swing arm; 13. L-shaped plate; 14. Threaded rod; 15. Stop block; 16. Connecting rod; 17. Compression spring; 18. Handle. Detailed Implementation
[0028] 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.
[0029] Please see Figure 1-5 This utility model provides a technical solution:
[0030] An angle-adjustable fixture for CNC lathes, comprising:
[0031] Base 1 is fixed to the lathe machining area by fixing screws, and a semi-circular rotating shell 2 is provided on the base 1;
[0032] The disc 3 is rotatably installed inside the rotating shell 2. A shaft is provided at the center of both sides of the disc 3, and the shaft is rotatably installed at the center of both sides of the rotating shell 2.
[0033] The base 1 is securely mounted on the lathe machining area with fixing screws, providing a stable support foundation for the entire fixture. The rotating shell 2 is set on the base 1, and the outer wall of the disc 3 and the inner wall of the rotating shell 2 are fitted with a clearance fit. Its semi-circular structure provides space and guidance for the rotation of the inner disc 3.
[0034] The base 1 ensures a reliable connection between the fixture and the lathe, guaranteeing the stability of the fixture during operation. The rotating shell 2 serves as the carrier for the rotation of the disc 3, allowing the disc 3 to rotate at a certain angle within it, providing a structural basis for adjusting the workpiece angle. The rotation of the disc 3 can drive the workpiece fixed on it to rotate together, thereby achieving the adjustment of the workpiece machining angle and meeting the machining needs of vertical lathes for opening inclined holes and other different angles.
[0035] Please see Figure 1-4 :
[0036] A fixing mechanism is set on the top of the disc 3 to clamp and fix the workpiece. The fixing mechanism includes a fixing seat 4, and handles 18 for rotating the disc 3 are provided on both sides of the fixing seat 4 to adjust the processing angle of the workpiece.
[0037] Specifically, the fixed base 4 has a U-shaped design, and the handle 18 is set on the outer wall of the two arms of the fixed base 4. A hydraulic cylinder 5 is installed on one side of the outer wall of the fixed base 4. The hydraulic rod of the hydraulic cylinder 5 passes through the fixed base 4 and is connected to the clamping block 6. The clamping block 6 and the inner wall of the other side of the fixed base 4 cooperate to clamp and fix the workpiece.
[0038] The fixed base 4 has a U-shaped design, providing a reasonable installation space and layout for the hydraulic cylinder 5, clamping block 6, and workpiece. Handles 18 are located on the outer walls of both arms of the fixed base 4, allowing the operator to rotate the disc 3 by gripping the handles 18, thereby adjusting the workpiece's machining angle. The hydraulic cylinder 5 is mounted on one outer wall of the fixed base 4, with its hydraulic rod passing through the fixed base 4 and connecting to the clamping block 6. When the hydraulic cylinder 5 operates, the hydraulic rod extends or retracts, causing the clamping block 6 to move linearly within the fixed base 4. The clamping block 6 and the inner wall of the other side of the fixed base 4 cooperate to clamp or release the workpiece placed in the middle.
[0039] By utilizing the power output of the hydraulic cylinder 5, the clamping block 6 can be moved automatically, which can quickly and stably clamp and fix the workpiece, ensuring the stability of the workpiece during the processing, preventing the workpiece from moving or vibrating due to processing force, thereby improving processing accuracy.
[0040] Among them, the bottom of the clamping block 6 is symmetrically provided with sliders 9, and the inner bottom of the fixed base 4 is symmetrically provided with sliders 9. The sliders 9 and the slide grooves 8 correspond one-to-one and slide together.
[0041] When the clamping block 6 moves under the action of the hydraulic cylinder 5, the slider 9 slides in the slide groove 8, providing guidance and support for the movement of the clamping block 6. The cooperation between the slider 9 and the slide groove 8 ensures the smoothness and straightness of the movement of the clamping block 6, so that the clamping force is evenly applied to the workpiece, avoiding the clamping block 6 from deviating or jamming during the movement, and further improving the reliability and stability of clamping.
[0042] Hydraulic cylinder 5 includes a power system:
[0043] Hydraulic pump station: It adopts a gear pump (displacement 10mL / r, rated pressure 16MPa) to supply oil, and is driven by a three-phase asynchronous motor (power 3kW, speed 1450rpm); the oil tank has a capacity of 40L and a built-in air-cooled cooler (temperature control range 35-55℃) to ensure that the system can work continuously for 8 hours without overheating.
[0044] Control circuit: A three-position four-way solenoid directional valve (center position functional type O) is used to control the hydraulic cylinder 5 to move forward and backward, and a speed regulating valve is used to achieve precise flow regulation (flow range 5-20L / min); the system pressure is set by a pilot-operated relief valve (working pressure 8-12MPa adjustable), and the equipment is automatically unloaded to protect it in case of overload.
[0045] Displacement control: Hydraulic cylinder 5 (63mm diameter, 100mm stroke) is equipped with a magnetostrictive displacement sensor (accuracy ±0.05mm) to provide real-time feedback on piston position.
[0046] For a preferred embodiment, please refer to Figure 1-4 :
[0047] Both the side wall of the clamping block 6 and the inner wall of the other side of the fixing seat 4 are fixed with rubber pads 7 by bolts. The rubber pads 7 are provided with countersunk holes for installing bolts.
[0048] The bolts securely fix the rubber pad 7 to the inner wall of the clamping block 6 and the fixing seat 4. The countersunk hole design ensures that the bolt head does not protrude from the surface of the rubber pad 7, thus ensuring that the rubber pad 7 and the workpiece are in flat contact.
[0049] The rubber pad 7 has good elasticity and cushioning properties, which can buffer the workpiece when clamping it, preventing damage to the workpiece surface due to excessive clamping force. It is especially suitable for processing workpieces with high surface quality requirements. At the same time, the rubber pad 7 can also increase the friction between the clamping block 6 and the workpiece, further improving the clamping firmness.
[0050] For a preferred embodiment, please refer to Figure 1-5 :
[0051] It also includes a positioning mechanism for positioning the machining angle, which is set at the end of the shaft of the disc 3. The positioning mechanism includes a swing arm 12, an L-shaped plate 13 and a positioning rod. The L-shaped plate 13 is set at the end of the swing arm 12, and the positioning rod is inserted into the end of the swing arm 12 and the L-shaped plate 13. The positioning rod includes a threaded rod 14, a stop block 15 and a connecting rod 16. The stop block 15 is located between the connecting rod 16 and the threaded rod 14, and the stop block 15 is located between the L-shaped plate 13 and the swing arm 12. The threaded rod 14 is threadedly installed at the end of the swing arm 12. The connecting rod 16 is slidably inserted into the L-shaped plate 13, and a knob is set at one end of the connecting rod 16 outside the L-shaped plate 13. A compression spring 17 is sleeved on the stop block 15 between the stop block 15 and the L-shaped plate 13. Multiple sets of positioning holes 11 are equidistantly arranged on both sides of the rotating shell 2. The positioning holes 11 correspond to the threaded rod 14. After the disc 3 is rotated to adjust the angle, the knob is rotated to insert the threaded rod 14 into the corresponding positioning hole 11 to position the angle. At the same time, the compression spring 17 presses the stop block 15 to fit against the swing arm 12 to prevent the threaded rod 14 from becoming loose.
[0052] When the knob is rotated, the connecting rod 16 will move the stop block 15 and the threaded rod 14 together. After the disc 3 is rotated to the required angle, rotating the knob will cause the threaded rod 14 to be inserted into the corresponding positioning hole 11 on the rotating shell 2. At this time, the compression spring 17 is compressed, and its elastic force presses the stop block 15 against the swing arm 12 to prevent the threaded rod 14 from loosening.
[0053] The threaded rod 14 and the positioning hole 11 work together to achieve precise locking of the angle of the disc 3; the design of the compression spring 17 and the stop block 15 ensures the firmness of the threaded rod 14 after positioning, and prevents the threaded rod 14 from coming out of the positioning hole 11 due to processing vibration and other reasons, thus ensuring the accuracy and reliability of angle positioning.
[0054] For a preferred embodiment, please refer to Figure 1-2 :
[0055] The rotating shell 2 has scale lines 10 arranged around both sides. Each set of scale lines 10 corresponds to each set of positioning holes 11. The lowest scale line 10 is 0 degrees, and the scale lines 10 on both sides are positive and negative angles respectively.
[0056] When the operator rotates the disc 3 to adjust the workpiece angle, the operator can accurately understand the rotation angle of the disc 3 by observing the scale line 10. The scale line 10 provides the operator with an intuitive angle reference, which makes it convenient for the operator to quickly and accurately adjust the workpiece to the required processing angle, improves the accuracy and efficiency of angle adjustment, and reduces processing errors caused by inaccurate angle adjustment.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. An angle adjustable special fixture for CNC lathe, characterized in that, The utility model relates to a lathe workpiece angle adjustable fixing device, including: Base (1) is fixed in lathe processing area through fixed screw, and base (1) is provided with semicircular rotary shell (2); Pie (3) is rotatably installed in the inside of rotary shell (2), and the center of both sides of pie (3) is provided with shaft rod, and the shaft rod is rotatably installed in the center of both sides of rotary shell (2); Fixing mechanism is arranged at the top of pie (3) and is used for clamping and fixing workpiece, and fixing mechanism includes fixed seat (4), and fixed seat (4) both sides are provided with handle (18) for rotating pie (3), so as to adjust the processing angle of workpiece.
2. The angle adjustable special fixture for CNC lathe according to claim 1, characterized in that: The fixed seat (4) is designed as concave letter, the handle (18) is arranged on the outer wall of the two arms of the fixed seat (4), the outer wall of one side of the fixed seat (4) is provided with a hydraulic cylinder (5), the hydraulic rod of the hydraulic cylinder (5) penetrates the fixed seat (4) and is connected with a clamping block (6), and the clamping block (6) and the other inner wall of the fixed seat (4) are matched to clamp and fix the workpiece.
3. The angle adjustable special fixture for CNC lathe according to claim 2, characterized in that: One side wall of the clamping block (6) and the other side inner wall of the fixed seat (4) are both fixed with rubber pads (7) through bolts, and the rubber pads (7) are provided with countersunk holes for mounting bolts.
4. The angle adjustable special fixture for CNC lathe as claimed in claim 1 wherein: It also includes a positioning mechanism for positioning the processing angle, which is arranged at the end of the shaft rod of the pie (3), and the positioning mechanism includes a swing arm (12), an L-shaped plate (13) and a positioning rod, the L-shaped plate (13) is arranged at the end of the swing arm (12), and the positioning rod is inserted into the end of the swing arm (12) and the L-shaped plate (13).
5. The angle adjustable special fixture for CNC lathe as claimed in claim 4, wherein: The positioning rod includes a threaded rod (14), a stop block (15) and a connecting rod (16), the stop block (15) is located between the connecting rod (16) and the threaded rod (14), and the stop block (15) is located between the L-shaped plate (13) and the swing arm (12), the threaded rod (14) is threadedly installed at the end of the swing arm (12), the connecting rod (16) is slidingly inserted into the L-shaped plate (13), and a knob is arranged at one end of the connecting rod (16) outside the L-shaped plate (13), and a compression spring (17) is sleeved between the stop block (15) and the L-shaped plate (13) on the connecting rod (16).
6. The angle adjustable special fixture for CNC lathe according to claim 5, wherein: Multiple sets of positioning holes (11) are arranged at equal intervals on both sides of the rotary shell (2), the positioning holes (11) correspond to the threaded rod (14), and after the angle of the pie (3) is adjusted, the knob is rotated to make the threaded rod (14) inserted into the corresponding positioning hole (11) to position the angle, and at the same time, the compression spring (17) extrudes the stop block (15) to adhere to the swing arm (12) to avoid loosening of the threaded rod (14).
7. The angle adjustable special fixture for CNC lathe according to claim 6, characterized in that: Scale lines (10) are arranged on both sides of the rotary shell (2), each set of scale lines (10) corresponds to each set of positioning holes (11), the lowermost scale line (10) is 0 degrees, and the scale lines (10) on both sides are positive and negative angles respectively.