Numerical control rotary table with temperature compensation

Abstract

The utility model relates to related technical field of machining especially, it is a kind of numerical control rotary table with temperature compensation, including base box, control box and circular workbench, the side surface of base box is equipped with heat dissipation hole, the side surface of base box is equipped with sliding slot, the side surface of base box is equipped with limit slot, the side surface of base box is equipped with circular slot, the inside surface of limit slot is provided with temperature regulating mechanism. This numerical control rotary table with temperature compensation, water body filled in the inside of temperature regulating pipe, by its physical characteristics of high specific heat capacity, can quickly absorb the excess heat of workbench due to cutting heat or environmental temperature fluctuation, effectively inhibit the thermal expansion and cold shrinkage deformation of base box, circular workbench and other key components by heat exchange, reduce the interference of temperature change to workbench rotation accuracy, graduation accuracy from source, guarantee precision stability in processing process, meet the demand of precision machining scene.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a CNC rotary table with temperature compensation. Background Technology

[0002] The CNC rotary table is a core functional component of CNC machine tools. It is mainly driven by a servo motor, combined with a precision transmission structure and CNC system, to drive the workpiece to achieve high-precision rotation or indexing positioning. It can expand the machining range of machine tools, ensure micron-level machining accuracy, and improve automation efficiency. Its components include a drive system, a CNC system, a positioning and detection device, and a high-strength base table. It is widely used in aerospace, automotive manufacturing and other fields for machining high-precision parts with complex curved surfaces, multi-faceted or circumferential features. Therefore, a CNC rotary table with temperature compensation is particularly needed.

[0003] Chinese Patent CN219053574U, published on May 23, 2023, discloses a novel CNC rotary table. It uses a synchronous belt to sequentially drive the driven wheel, first chuck, mandrel, and worktable to rotate. The flexible connection ensures precise motion transmission. Simultaneously, the driven wheel and first chuck transmit motion through friction. When the worktable is subjected to external force, the driven wheel and first chuck are forced to slip, thus preventing damage to other structures and improving safety. However, this CNC rotary table lacks an effective structure to address temperature changes. In actual working conditions, factors such as motor operation heat generation, cutting heat conduction, and ambient temperature fluctuations can easily cause thermal expansion and contraction of the synchronous belt, mandrel, and worktable surface, affecting both metal and non-metal components. This can not only change the tension of the synchronous belt and compromise transmission accuracy but also alter the clearance between the worktable and mandrel, thus affecting workpiece positioning and machining accuracy. This makes it difficult to meet the stringent temperature stability requirements of high-precision machining scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a CNC rotary table with temperature compensation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CNC rotary table with temperature compensation, comprising a base box, a control box and a circular worktable, wherein a heat dissipation hole is provided on one side surface of the base box, a sliding groove is provided on one side surface of the base box, a limiting groove is provided on one side surface of the base box, a circular groove is provided on one side surface of the base box, and a temperature adjustment mechanism is provided on the inner surface of the limiting groove;

[0006] The temperature control mechanism includes a limiting strip and a spring. The limiting strip is slidably connected to the inner wall surface of the limiting groove. The spring is fixedly connected to the inner wall surface of the circular groove. A connecting block is fixedly connected to one side surface of the spring. A first slot is formed on the side surface of the connecting block away from the spring. A sliding block is fixedly connected to one side surface of the limiting strip. A second slot is formed on the side surface of the sliding block near the connecting block. A protrusion is fixedly connected to the side surface of the sliding block away from the second slot. A temperature control tube is inserted into the inner surface of the second slot. A connecting ring is fixedly connected to one end of the temperature control tube. A tube cap is threaded onto the outer surface of the connecting ring.

[0007] Preferably, the inner wall surface of the temperature regulating tube is filled with water, and the protrusions are provided in multiples of the same size and are arranged at equal distances along the side surface of the sliding block away from the second slot.

[0008] Preferably, the sliding groove, sliding block, circular groove, temperature regulating tube, spring, connecting block, connecting ring and tube cover are all provided with four of the same size, and the inner wall size of the sliding groove is adapted to the outer wall size of the sliding block.

[0009] Preferably, the heat dissipation holes are provided with multiple holes of the same size, the heat dissipation holes are connected to the circular groove, and the inner wall size of the circular groove is adapted to the outer wall size of the temperature regulating tube and the tube cover.

[0010] Preferably, the first and second slots are adapted to the end of the temperature control tube and the tube cover away from the connecting ring, and the cross-section of the limiting strip is designed in the shape of a "□".

[0011] Preferably, the limiting strips are provided in four groups of the same size, and each group is provided with two of the same size; the limiting grooves are provided in four groups of the same size, and each group is provided with two of the same size; the sizes of the limiting strips and the limiting grooves are adapted to each other.

[0012] Preferably, the inner wall dimensions of the circular groove are adapted to the outer wall dimensions of the spring and the connecting block, and the vertical central axes of the spring and the connecting block coincide.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the water filled inside the temperature-compensated CNC rotary table, with its high specific heat capacity, can quickly absorb the excess heat generated by the cutting heat or ambient temperature fluctuations of the worktable. Through heat exchange, it effectively suppresses the thermal expansion and contraction deformation of key components such as the base box and the circular worktable, thereby reducing the interference of temperature changes on the rotation accuracy and indexing accuracy of the worktable from the source, ensuring the stability of accuracy during the processing, and meeting the needs of precision machining scenarios.

[0014] The heat dissipation holes are connected to the circular groove, which can accelerate the air circulation around the temperature regulating tube, assist the water in dissipating heat, and prevent the temperature regulating tube from losing its compensation ability due to heat accumulation. This further improves the continuous effectiveness of temperature compensation. The tube cover and the temperature regulating tube are connected by a threaded connecting ring. The tube cover can be installed and removed by manually screwing it on, which facilitates the quick replenishment or replacement of the water inside the temperature regulating tube, reduces maintenance time, ensures that the temperature regulating tube can quickly restore its temperature compensation function, and reduces the impact on processing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the base box, control box, circular worktable, and heat dissipation holes of this utility model.

[0017] Figure 3 This is a schematic diagram of the spring, connecting block, and first slot structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the sliding block and the second slot structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the temperature regulating tube, connecting ring, and tube cap of this utility model;

[0020] Figure 6 This is a schematic diagram of the protrusion and limiting strip structure of this utility model.

[0021] In the diagram: 1. Base housing; 2. Control housing; 3. Circular worktable; 4. Heat dissipation holes; 5. Sliding groove; 6. Limiting groove; 7. Circular groove; 8. Temperature control mechanism; 801. Limiting strip; 802. Spring; 803. Connecting block; 804. First slot; 805. Sliding block; 806. Second slot; 807. Protrusion; 808. Temperature control tube; 809. Connecting ring; 810. Tube cover. 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] Please see Figure 1-6This utility model provides a technical solution: a CNC rotary table with temperature compensation, including a base box 1, a control box 2 and a circular worktable 3. A heat dissipation hole 4 is provided on one side surface of the base box 1, a sliding groove 5 is provided on one side surface of the base box 1, a limit groove 6 is provided on one side surface of the base box 1, a circular groove 7 is provided on one side surface of the base box 1, and a temperature adjustment mechanism 8 is provided on the inner surface of the limit groove 6.

[0024] The temperature control mechanism 8 includes a limiting strip 801 and a spring 802. The limiting strip 801 is slidably connected to the inner wall surface of the limiting groove 6, and the spring 802 is fixedly connected to the inner wall surface of the circular groove 7. A connecting block 803 is fixedly connected to one side surface of the spring 802, and a first slot 804 is formed on the side surface of the connecting block 803 away from the spring 802. A sliding block 805 is fixedly connected to one side surface of the limiting strip 801, and a second slot 806 is formed on the side surface of the sliding block 805 near the connecting block 803. A protrusion 807 is fixedly connected to the side surface of the sliding block 805 away from the second slot 806. A temperature regulating tube 808 is inserted into the inner surface of the second slot 806. A connecting ring 809 is fixedly connected to one end of the temperature regulating tube 808. A tube cap 810 is threadedly connected to the outer surface of the connecting ring 809. Through the arrangement of the limiting strip 801, spring 802, connecting block 803, sliding block 805, second slot 806, protrusion 807, temperature regulating tube 808, connecting ring 809, and tube cap 810, during use... The sliding block 805 with protrusion 807 is pushed to move linearly along the sliding groove 5. At the same time, the limiting strip 801 and the limiting groove 6 play a limiting and guiding role. The sliding block 805 will drive its own second slot 806 away from the end of the temperature regulating tube 808, releasing the limiting constraint of the second slot 806 on the temperature regulating tube 808. As the second slot 806 moves, the connecting block 803 and spring 802 that cooperate with the end of the temperature regulating tube 808 in the circular groove 7 will be released from their constraints. The spring 802 will release its preload. The force pushes the connecting block 803, which applies an axial thrust to the temperature regulating tube 808, pushing the end of the temperature regulating tube 808 with the tube cover 810 out of the circular groove 7. The operator can directly remove the temperature regulating tube 808 without the need for special tools, simplifying the disassembly process. The connecting ring 809 at one end of the temperature regulating tube 808 and the tube cover 810 adopt a threaded connection structure. The operator can remove and install the tube cover 810 by manually turning it, which facilitates the quick replenishment or replacement of the water inside the temperature regulating tube 808.

[0025] Furthermore, the inner wall surface of the temperature control tube 808 is filled with water, and multiple protrusions 807 of the same size are provided and are arranged at equal distances along the side surface of the sliding block 805 away from the second slot 806. By setting the protrusions 807, during use, the protrusions 807 increase the coefficient of friction of the surface of the sliding block 805, so that the operator does not need to apply excessive pushing force to push the sliding block 805, avoiding repeated operation caused by the hand slipping on the surface of the sliding block 805, and reducing the intensity of operation.

[0026] Furthermore, four of the same size are provided for the sliding groove 5, sliding block 805, circular groove 7, temperature regulating tube 808, spring 802, connecting block 803, connecting ring 809 and tube cover 810. The inner wall size of the sliding groove 5 is adapted to the outer wall size of the sliding block 805. With the setting of the sliding groove 5 and the sliding block 805, during use, because the inner wall size of the sliding groove 5 is precisely adapted to the outer wall size of the sliding block 805, the sliding block 805 can move linearly along the trajectory of the sliding groove 5, avoiding deviation and shaking.

[0027] Furthermore, multiple heat dissipation holes 4 of the same size are provided. The heat dissipation holes 4 are connected to the circular groove 7. The inner wall size of the circular groove 7 is adapted to the outer wall size of the temperature regulating tube 808 and the tube cover 810. With the setting of heat dissipation holes 4, when in use, the heat dissipation holes 4 are connected to the circular groove 7, which can accelerate the air circulation around the temperature regulating tube 808, assist the water in dissipating heat, and prevent the temperature regulating tube 808 from reducing its compensation capacity due to heat accumulation, thereby further improving the continuous effectiveness of temperature compensation.

[0028] Furthermore, the first slot 804 and the second slot 806 are adapted to the end of the temperature regulating tube 808 and the tube cover 810 away from the connecting ring 809. The cross-section of the limiting strip 801 is designed in the shape of a "□". Through the setting of the first slot 804, the second slot 806, the temperature regulating tube 808 and the tube cover 810, in use, the first slot 804 and the second slot 806 can better restrict the temperature regulating tube 808 and the tube cover 810, while ensuring that the connecting block 803 can stably push the temperature regulating tube 808 and the tube cover 810 out of the circular groove 7.

[0029] Furthermore, the limiting strip 801 is provided with four sets of the same size, and each set has two of the same size. The limiting groove 6 is provided with four sets of the same size, and each set has two of the same size. The size of the limiting strip 801 and the limiting groove 6 are adapted to each other. Through the setting of the limiting strip 801 and the limiting groove 6, the constraint effect of the limiting strip 801 and the limiting groove 6 can offset the influence of vibration on the sliding block 805 during use, prevent the sliding block 805 from loosening, and thus avoid the temperature regulating tube 808 from shifting or falling off, ensuring that the temperature compensation process is not interrupted. It is especially suitable for high-speed and high-vibration processing scenarios.

[0030] Furthermore, the inner wall dimensions of the circular groove 7 are adapted to the outer wall dimensions of the spring 802 and the connecting block 803, and the vertical central axes of the spring 802 and the connecting block 803 coincide. Through the arrangement of the circular groove 7, the spring 802 and the connecting block 803, the size compatibility between the circular groove 7 and the spring 802 and the connecting block 803 during use restricts their radial displacement. Combined with the design of the coincident central axes, the elastic force of the spring 802 is evenly applied to the temperature regulating tube 808, ensuring that the temperature regulating tube 808 always remains coaxially fixed in the circular groove 7, making the mechanism more stable.

[0031] Working Principle: When the CNC rotary table experiences temperature changes during machining due to heat conduction from cutting or fluctuations in ambient temperature, the temperature regulating tube 808 inside the circular groove 7 of the base housing 1, utilizing the high specific heat capacity of the water it fills, quickly absorbs heat. Through the heat exchange of the water, it suppresses the thermal expansion and contraction deformation of the base housing 1 and key components of the worktable, thus offsetting the adverse effects of temperature changes on the rotational and indexing accuracy of the worktable, achieving precise temperature compensation. When it is necessary to replace the temperature regulating tube 808 or replenish its internal water, firstly, push the sliding block 805 to move linearly along the sliding groove 5. Simultaneously, the limiting strip 801 and the limiting groove 6 act as guides and limits. The sliding block 805 will then move its own second locking groove 806 away from the end of the temperature regulating tube 808, releasing it. The second slot 806 limits the movement of the temperature control tube 808. As the second slot 806 moves, the connecting block 803 and spring 802, which are in contact with the end of the temperature control tube 808, in the circular groove 7 are simultaneously released from their constraints. The spring 802 releases its preload and pushes the connecting block 803. The connecting block 803 applies an axial thrust to the temperature control tube 808, pushing the end of the temperature control tube 808 with the tube cap 810 out of the circular groove 7. The operator can then directly remove the temperature control tube 808 without the need for special tools, simplifying the disassembly process. The connecting ring 809 at one end of the temperature control tube 808 and the tube cap 810 are connected by a threaded structure. The operator can manually screw on the tube cap 810 to remove or install it, making it easy to quickly replenish or replace the water inside the temperature control tube 808. This completes the use of a CNC rotary table with temperature compensation.

[0032] 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 CNC rotary table with temperature compensation, comprising a base housing (1), a control housing (2), and a circular worktable (3), characterized in that: The base box (1) has a heat dissipation hole (4) on one side surface, a sliding groove (5) on one side surface, a limiting groove (6) on one side surface, a circular groove (7) on one side surface, and a temperature regulating mechanism (8) on the inner surface of the limiting groove (6). The temperature control mechanism (8) includes a limiting strip (801) and a spring (802). The limiting strip (801) is slidably connected to the inner wall surface of the limiting groove (6), and the spring (802) is fixedly connected to the inner wall surface of the circular groove (7). A connecting block (803) is fixedly connected to one side surface of the spring (802), and a first slot (804) is formed on the side surface of the connecting block (803) away from the spring (802). A sliding... The sliding block (805) has a second slot (806) on the side surface near the connecting block (803). A protrusion (807) is fixedly connected to the side surface of the sliding block (805) away from the second slot (806). A temperature regulating tube (808) is inserted into the inner surface of the second slot (806). A connecting ring (809) is fixedly connected to one end of the temperature regulating tube (808). A tube cap (810) is threaded onto the outer surface of the connecting ring (809).

2. The CNC rotary table with temperature compensation according to claim 1, characterized in that: The inner wall surface of the temperature regulating tube (808) is filled with water, and the protrusions (807) are provided in multiple sizes and are arranged at equal distances along the side surface of the sliding block (805) away from the second slot (806).

3. A CNC rotary table with temperature compensation according to claim 1, characterized in that: The sliding groove (5), sliding block (805), circular groove (7), temperature regulating tube (808), spring (802), connecting block (803), connecting ring (809) and tube cap (810) are all provided with four of the same size, and the inner wall size of the sliding groove (5) is adapted to the outer wall size of the sliding block (805).

4. A CNC rotary table with temperature compensation according to claim 1, characterized in that: The heat dissipation holes (4) are provided with multiple holes of the same size. The heat dissipation holes (4) are connected to the circular groove (7). The inner wall size of the circular groove (7) is adapted to the outer wall size of the temperature regulating tube (808) and the tube cover (810).

5. A CNC rotary table with temperature compensation according to claim 1, characterized in that: The first slot (804) and the second slot (806) are adapted to the end of the temperature control tube (808) and the tube cap (810) away from the connecting ring (809), and the cross-section of the limiting strip (801) is designed in the shape of "□".

6. A CNC rotary table with temperature compensation according to claim 1, characterized in that: The limiting strip (801) is provided with four sets of the same size, and each set is provided with two of the same size. The limiting groove (6) is provided with four sets of the same size, and each set is provided with two of the same size. The size of the limiting strip (801) and the limiting groove (6) are compatible.

7. A CNC rotary table with temperature compensation according to claim 1, characterized in that: The inner wall dimensions of the circular groove (7) are adapted to the outer wall dimensions of the spring (802) and the connecting block (803), and the vertical central axes of the spring (802) and the connecting block (803) coincide.

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