Lead screw cold and hot pre-stretching device for numerical control machine tool

Abstract

The utility model discloses a lead screw cold and hot prestretching device for a numerical control machine tool, which relates to the technical field of numerical control machine tools and comprises a base, two groups of sliding rails are arranged on the outer surface of the upper end of the base, two groups of sliding blocks are arranged at the upper ends of the two groups of sliding rails, and fixing blocks are arranged at the upper ends of the two groups of sliding blocks. Threaded rods are arranged on the two sides of the upper ends of the two sets of fixing blocks correspondingly, a movable plate is arranged at the upper ends of the threaded rods, driven gears are arranged at the positions, in the movable plate, of the upper ends of the two sets of threaded rods correspondingly, a driving gear is arranged between the driven gears, and a motor is arranged at the upper end of the movable plate. And a threaded groove is formed between the movable plate and the fixed block. According to the lead screw cold and hot pre-stretching device for the numerical control machine tool, the distance between the movable plate and the fixed block can be adjusted, lead screws with different diameters can be fixed conveniently, and the lead screws are fixed more stably in the pre-stretching process.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a lead screw hot and cold pre-stretching device for numerical control machine tools. Background Art

[0002] The lead screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or to convert torque into axial repetitive force. It also has the characteristics of high precision, reversibility and high efficiency. Due to its very small friction resistance, ball screws are widely used in various industrial equipment and precision instruments. They can automatically process parts according to the shape and size required by the drawings. The pre-stretching structure of the lead screw plays a vital role in the accuracy of the workpiece processed by CNC machine tools during processing operations.

[0003] After the machine tool has been running continuously, the friction between the lead screw and the nut causes the temperature to rise, which causes the lead screw to stretch due to the temperature increase, resulting in errors in the machine tool accuracy. Therefore, the lead screw needs to be pre-stretched before the machine tool works. The existing pre-stretching device usually cannot adapt to lead screws of different diameters when fixing the lead screw, causing the lead screw to loosen or slip during pre-stretching, affecting the effect of the lead screw pre-stretching. In order to solve the shortcomings of the existing technology, we propose a lead screw hot and cold pre-stretching device for CNC machine tools. Utility Model Content

[0004] The main purpose of the utility model is to provide a hot and cold pre-stretching device for a lead screw for a numerically controlled machine tool, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A lead screw hot and cold pre-stretching device for a numerically controlled machine tool comprises a base, wherein the upper outer surface of the base is provided with two groups of sliding rails, the upper ends of the two groups of sliding rails are provided with two groups of sliding blocks, the upper ends of the two groups of sliding blocks are provided with fixed blocks, the upper ends of the two groups of fixed blocks are provided with threaded rods on both sides of the upper ends, the upper ends of the threaded rods are provided with movable plates, the upper ends of the two groups of threaded rods are provided with driven gears inside the movable plates, a driving gear is provided between the driven gears, a motor is provided at the upper end of the movable plate, a connecting port is provided between the motor and the driving gear, the motor is detachably connected to the driving gear through the provided connecting port, a threaded groove is provided between the movable plate and the fixed block, a No. 2 mounting block is provided in the middle of the upper end of the base, No. 2 cylinders are provided on both sides of the No. 2 mounting block, the two groups of No. 2 cylinders are provided with connecting ports respectively between the side walls of the sliding block, and the No. 2 cylinders are detachably connected to the side walls of the sliding block through the provided connecting ports.

[0007] Preferably, four groups of support rods are also provided at the upper end of the base, a top plate is provided at the upper ends of the four groups of support rods, a No. 1 mounting block is provided in the middle of the top plate, two groups of No. 1 cylinders are provided in the middle of the No. 1 mounting block, heaters are provided at the lower ends of the two groups of No. 1 cylinders, and multiple groups of heating rods are provided inside the heaters.

[0008] Preferably, the sliding block is slidably connected to the sliding track, a threaded interface is provided between the threaded rod and the fixed block, and the threaded rod is threadedly connected to the fixed block via the provided threaded interface.

[0009] Preferably, a rotating shaft is provided between the driven gear and the inner wall of the movable plate, and the driven gear is rotatably connected to the inner wall of the movable plate through the provided rotating shaft. A rotating interface is provided between the threaded rod and the movable plate, and the threaded rod is rotatably connected to the movable plate through the provided rotating interface.

[0010] Preferably, a mounting interface is provided between the No. 1 mounting block and the top plate, and the No. 1 mounting block is detachably connected to the top plate via the provided mounting interface.

[0011] Preferably, a connecting port is provided between the heater and cylinder No. 1, and the heater is detachably connected to cylinder No. 1 via the provided connecting port; and an installation interface is provided between the heating rod and the heater, and the heating rod is detachably connected to the heater via the provided installation interface.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The two sets of threaded rods can be rotated inside the fixed block, so that the movable plate can be moved downward to fix the screw in the middle of the threaded groove, and then the No. 2 cylinders on both sides of the No. 2 mounting block can be telescopically moved to drive the sliding block to slide on the upper end of the sliding track, so that the screw can be pre-stretched, and the operation is convenient and quick.

[0015] 2. In the utility model, by setting up the No. 1 mounting block, No. 1 cylinder, heater and heating rod, the device can preheat the lead screw during the pre-stretching process of the lead screw to prevent the lead screw from generating heat due to friction during the operation of the machine tool, causing the lead screw to expand and deform, resulting in increased friction. By preheating the lead screw through the heater and the heating rod, the device can adapt to the thermal expansion of the lead screw in advance, making the lead screw more stable when working inside the machine tool. When the lead screw is pre-stretched in the middle of the thread groove, the No. 1 cylinder in the middle of the No. 1 mounting block telescopes and drives the heater to move downward, so that the heater moves to the periphery of the lead screw. The heating rod inside the heater preheats the lead screw, allowing the lead screw to adapt to the heat generated by friction in advance, so that the hot and cold pre-stretching effect of the lead screw is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the sliding block moving structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the threaded rod connection structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the heater connection structure of the utility model.

[0020] In the figure: 1. base; 2. support rod; 3. top plate; 4. mounting block No. 1; 5. cylinder No. 1; 6. heater; 7. sliding track; 8. sliding block; 9. fixed block; 10. threaded rod; 11. movable plate; 12. threaded groove; 13. motor; 14. mounting block No. 2; 15. cylinder No. 2; 16. driving gear; 17. driven gear; 18. heating rod. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 4As shown, a lead screw hot and cold pre-stretching device for a CNC machine tool comprises a base 1, two sets of sliding rails 7 are arranged on the outer surface of the upper end of the base 1, two sets of sliding blocks 8 are arranged on the upper ends of the two sets of sliding rails 7, the sliding blocks 8 can slide on the upper ends of the sliding rails 7, the upper ends of the two sets of sliding blocks 8 are both provided with fixed blocks 9, threaded rods 10 are arranged on both sides of the upper ends of the two sets of fixed blocks 9, a threaded interface is arranged between the threaded rod 10 and the fixed block 9, the threaded rod 10 is threadedly connected with the fixed block 9 through the arranged threaded interface, a movable plate 11 is arranged on the upper end of the threaded rod 10, and a rotating plate is arranged between the threaded rod 10 and the movable plate 11 The movable plate 11 has a movable interface, the threaded rod 10 can rotate at the lower end of the movable plate 11, the upper ends of the two groups of threaded rods 10 are provided with driven gears 17 inside the movable plate 11, a rotating shaft is provided between the driven gear 17 and the inner wall of the movable plate 11, the driven gear 17 can rotate inside the movable plate 11, a driving gear 16 is provided between the driven gears 17, the driving gear 16 can drive the two groups of driven gears 17 to rotate, the upper end of the movable plate 11 is provided with a motor 13, a connecting port is provided between the motor 13 and the driving gear 16, the motor 13 is detachably connected to the driving gear 16 through the provided connecting port, and the motor 13 Drive the active gear 16 to rotate, a thread groove 12 is provided between the movable plate 11 and the fixed block 9, and the lead screw is fixed in the middle of the thread groove 12. A No. 2 mounting block 14 is provided in the middle of the upper end of the base 1, and a No. 2 cylinder 15 is provided on both sides of the No. 2 mounting block 14. The No. 2 cylinder 15 can be telescopically movable, and connecting ports are provided between the two groups of No. 2 cylinders 15 and the side walls of the sliding block 8 respectively. The No. 2 cylinders 15 are detachably connected to the side walls of the sliding block 8 through the provided connecting ports. The telescopic movement of the No. 2 cylinder 15 can drive the sliding block 8 to slide on the upper end of the sliding track 7. The two ends of the lead screw are respectively placed on the two groups of fixed The motor 13 at the upper end of the movable plate 11 is started, driving the driving gear 16 to rotate inside the movable plate 11. When the driving gear 16 rotates, it drives the driven gears 17 on both sides to rotate, and the driven gears 17 can drive the threaded rod 10 at the lower end to rotate. The two groups of threaded rods 10 will rotate inside the fixed block 9, so that the movable plate 11 can move downward, fix the lead screw in the middle of the threaded groove 12, and then the No. 2 cylinder 15 on both sides of the No. 2 mounting block 14 can telescope and drive the sliding block 8 to slide on the upper end of the sliding track 7, so that the lead screw can be pre-stretched.

[0023] like Figure 1-Figure 4As shown, four groups of support rods 2 are also provided at the upper end of the base 1, and a top plate 3 is provided at the upper ends of the four groups of support rods 2. The top plate 3 is installed above the base 1 through the provided support rods 2. A No. 1 mounting block 4 is provided in the middle of the top plate 3, and a mounting interface is provided between the No. 1 mounting block 4 and the top plate 3. The No. 1 mounting block 4 is detachably connected to the top plate 3 through the provided mounting interface. Two groups of No. 1 cylinders 5 are provided in the middle of the No. 1 mounting block 4, and the No. 1 mounting block 4 is used to install the No. 1 cylinder 5, and the No. 1 cylinder 5 can be telescopically movable. A heater 6 is provided at the lower ends of the two groups of No. 1 cylinders 5, and the heater 6 can move up and down through the No. 1 cylinder 5. The heater 6 is used to preheat the lead screw, and a plurality of groups of heating rods 18 are provided inside the heater 6, and the heating rods 18 can generate heat. When the lead screw is pre-stretched in the middle of the threaded groove 12, the No. 1 cylinder 5 in the middle of the No. 1 mounting block 4 is telescopically movable, driving the heater 6 to move downward, so that the heater 6 moves to the periphery of the lead screw, and the heating rod 18 inside the heater 6 preheats the lead screw.

[0024] It should be noted that the utility model is a hot and cold pre-stretching device for a lead screw for a CNC machine tool. When in use, the two ends of the lead screw are respectively placed in the middle of the threaded groove 12 at the upper ends of the two groups of fixed blocks 9, and then the motor 13 at the upper end of the movable plate 11 is started, driving the driving gear 16 to rotate inside the movable plate 11. When the driving gear 16 rotates, it drives the driven gears 17 on both sides to rotate, and the driven gear 17 can drive the threaded rod 10 at the lower end to rotate. The two groups of threaded rods 10 will rotate inside the fixed block 9, so that the movable plate 11 can move downward, and the lead screw in the middle of the threaded groove 12 is fixed. Then the No. 2 cylinder 15 on both sides of the No. 2 mounting block 14 can be telescopically movable, driving the sliding block 8 to slide on the upper end of the sliding track 7, so that the lead screw can be pre-stretched. At the same time, the No. 1 cylinder 5 in the middle of the No. 1 mounting block 4 can be telescopically movable, driving the heater 6 to move downward, so that the heater 6 moves to the periphery of the lead screw, and the heating rod 18 inside the heater 6 preheats the lead screw.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hot and cold pre-stretching device for a lead screw for a CNC machine tool, comprising a base (1), characterized in that: Two groups of sliding rails (7) are arranged on the outer surface of the upper end of the base (1), two groups of sliding blocks (8) are arranged on the upper ends of the two groups of sliding rails (7), fixed blocks (9) are arranged on the upper ends of the two groups of sliding blocks (8), threaded rods (10) are arranged on both sides of the upper ends of the two groups of fixed blocks (9), a movable plate (11) is arranged on the upper ends of the threaded rods (10), driven gears (17) are arranged on the upper ends of the two groups of threaded rods (10) inside the movable plate (11), driving gears (16) are arranged between the driven gears (17), and a motor (13) is arranged on the upper end of the movable plate (11). ), a connection port is provided between the motor (13) and the driving gear (16), and the motor (13) is detachably connected to the driving gear (16) through the provided connection port, a threaded groove (12) is provided between the movable plate (11) and the fixed block (9), a No. 2 mounting block (14) is provided in the middle of the upper end of the base (1), and No. 2 cylinders (15) are provided on both sides of the No. 2 mounting block (14), and connection ports are provided between the two groups of the No. 2 cylinders (15) and the side walls of the sliding block (8), and the No. 2 cylinders (15) are detachably connected to the side walls of the sliding block (8) through the provided connection ports.

2. The hot and cold pre-stretching device for a lead screw for a CNC machine tool according to claim 1, characterized in that: Four groups of support rods (2) are also arranged at the upper end of the base (1), a top plate (3) is arranged at the upper end of the four groups of support rods (2), a No. 1 mounting block (4) is arranged in the middle of the top plate (3), two groups of No. 1 cylinders (5) are arranged in the middle of the No. 1 mounting block (4), heaters (6) are arranged at the lower ends of the two groups of No. 1 cylinders (5), and multiple groups of heating rods (18) are arranged inside the heater (6).

3. The hot and cold pre-stretching device for a lead screw for a CNC machine tool according to claim 1, characterized in that: The sliding block (8) is slidably connected to the sliding track (7), a threaded interface is provided between the threaded rod (10) and the fixed block (9), and the threaded rod (10) is threadedly connected to the fixed block (9) via the provided threaded interface.

4. The hot and cold pre-stretching device for a lead screw for a CNC machine tool according to claim 1, characterized in that: A rotating shaft is provided between the driven gear (17) and the inner wall of the movable plate (11), and the driven gear (17) is rotatably connected to the inner wall of the movable plate (11) via the provided rotating shaft. A rotating interface is provided between the threaded rod (10) and the movable plate (11), and the threaded rod (10) is rotatably connected to the movable plate (11) via the provided rotating interface.

5. The hot and cold pre-stretching device for a lead screw for a CNC machine tool according to claim 2, characterized in that: A mounting interface is provided between the No. 1 mounting block (4) and the top plate (3), and the No. 1 mounting block (4) is detachably connected to the top plate (3) via the provided mounting interface.

6. The hot and cold pre-stretching device for a lead screw for a CNC machine tool according to claim 2, characterized in that: A connection port is provided between the heater (6) and the first cylinder (5), and the heater (6) is detachably connected to the first cylinder (5) via the provided connection port. A mounting interface is provided between the heating rod (18) and the heater (6), and the heating rod (18) is detachably connected to the heater (6) via the provided mounting interface.

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