A high-precision two-axis automatic grinding wheel dresser

Abstract

The present invention discloses a high-precision two-axis automatic grinding wheel dresser, comprising a base, a diamond roller fixed shaft system disposed on the left side of the base, a rotary shaft system disposed on the base, a power unit disposed on the base, and a power transmission unit connecting the power unit and the diamond roller fixed shaft system. The present invention has a simple and compact structure, integrating the power source, transmission unit, and terminal unit. The dual-axis system is simple and highly practical, with all mechanisms directly or indirectly fixed to the base, resulting in high space utilization.

Description

Technical Field

[0001] The invention relates to a high-precision two-axis automatic grinding wheel dresser, and more particularly to a high-precision two-axis automatic grinding wheel dresser with a compact structure and suitable for large-lead grinding. Background Art

[0002] Grinding is widely used and is a primary method for precision machining of mechanical parts. It is particularly well-suited for machining hard materials such as cemented carbide and hardened steel. Thread grinding, currently the primary machining method for lead screws and nuts, offers high precision and relatively mature technology. However, due to the high hardness of the workpiece and the softness of the grinding wheel, the grinding wheel wears rapidly during machining. Due to the stringent precision control of lead screws and nuts, frequent grinding wheel dressing is required to ensure product quality. The development of a high-precision, high-rigidity grinding wheel dressing device is highly beneficial for thread machining.

[0003] The most notable feature of a small-diameter, large-lead ball screw pair is its high movement speed at the same rotational speed, with the larger the lead, the faster the movement speed. With ever-increasing demands for production efficiency, users are demanding faster and faster movement speeds for various mechanical equipment, and the demand for large-lead ball screw pairs is also increasing. This type of screw nut requires a dresser that can achieve more precise large deflection angle control during the shaping process, and the structure must have a certain degree of stability to meet the needs of frequent dressing. However, there is currently a lack of research on grinding wheel dressers that can achieve large deflection angles and high dressing accuracy, which seriously restricts the manufacture of large-lead screw nuts and directly affects product quality. In view of the above situation, there is an urgent need for a new type of grinding wheel dresser with high stability and large deflection angle to meet production needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-precision two-axis automatic grinding wheel dresser with a compact structure and suitable for large-lead grinding in view of the shortcomings of the existing technology. The specific solution is as follows:

[0005] The present invention is a high-precision two-axis automatic grinding wheel dresser, which is characterized in that: the high-precision two-axis automatic grinding wheel dresser includes a base, a diamond roller fixed shaft system arranged on the left side of the base, a rotary shaft system arranged on the base, a power unit arranged on the base, and a power transmission unit connecting the power unit and the diamond roller fixed shaft system.

[0006] The technical problem to be solved by the present invention can also be further achieved through the following technical solution, the diamond roller fixed shaft system includes a diamond roller shaft for mounting the diamond roller, a shaft system housing arranged on the diamond roller shaft, and a first angular contact bearing arranged between the diamond roller shaft and the shaft system housing.

[0007] The technical problem to be solved by the present invention can be further achieved by the following technical solution: a coolant diversion module is provided on the rotary shaft system at the position of the diamond roller shaft.

[0008] The technical problem to be solved by the present invention can also be further achieved through the following technical solution, the rotating shaft system includes a rotating shaft, a front turntable and a rear turntable respectively arranged on the rotating shaft from left to right, the base is arranged between the front turntable and the rear turntable, a second angular contact bearing is arranged between the base and the rotating shaft, and a screw is axially passed through the front turntable, the base and the rear turntable.

[0009] The technical problem to be solved by the present invention can be further achieved through the following technical solutions: the second angular contact bearing and end cover with axis constraint are provided on the rotating shaft; the shaft shoulder is provided on the rotating shaft to facilitate the axial positioning of the rear turntable.

[0010] The technical problem to be solved by the present invention can be further achieved through the following technical solution, wherein the front turntable, base and rear turntable are respectively provided with a front turntable through hole, a base waist groove and a rear turntable through hole for the screw to pass through in sequence, and the rotation angle range of the front turntable and the rear turntable relative to the base is equal to the angle range of the front turntable and the rear turntable relative to the base when the screw is at the leftmost and rightmost sides of the base waist groove.

[0011] The technical problem to be solved by the present invention can be further achieved through the following technical solution, wherein the front turntable, the base and the rear turntable are provided with angle measuring devices located on the top surface of the front turntable, the top surface of the base and the top surface of the rear turntable, and the installation plane where the angle measuring device is located is set horizontally.

[0012] The technical problem to be solved by the present invention can be further achieved by the following technical solution: the power unit includes a motor base mechanism installed on the base and a motor arranged on the motor base mechanism.

[0013] The technical problem to be solved by the present invention can also be further achieved through the following technical solution, the power transmission unit includes a transmission belt connecting the power unit and the diamond roller fixed shaft system, two pulleys cooperating with the transmission belt, and a support plate installed between the power unit and the diamond roller fixed shaft system.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. High precision, the rotary shaft system and the diamond roller shaft system are both fixed with four-corner contact bearings, with good rigidity and high shaft rotation accuracy;

[0016] 2. The structure is simple and compact. The present invention integrates the power source, transmission unit and terminal unit. At the same time, the dual-axis system has a simple structure and high practicality. All mechanisms are directly or indirectly fixed to the base, and the space utilization rate is high.

[0017] 3. Leave enough space for the angle measurement control mechanism. The special angle measurement mechanism adopts simple principles to achieve high-precision angle control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a three-dimensional diagram of a high-precision two-axis automatic grinding wheel dresser of the present invention;

[0020] Figure 2 This is a structural schematic diagram of a high-precision two-axis automatic grinding wheel dresser of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a rotary axis system in a high-precision two-axis automatic grinding wheel dresser of the present invention;

[0022] Figure 4 This is a structural schematic diagram of a base in a high-precision two-axis automatic grinding wheel dresser of the present invention;

[0023] In the figure: 1-diamond roller shaft, 2-shaft housing, 3-power transmission unit, 4-rotating shaft, 5-front turntable, 6-base, 7-rear turntable, 8-motor seat mechanism, 9-power unit, 10-diamond roller, 11-coolant diversion module, 12-screw, 13-first angular contact ball bearing, 14-pulley, 15-motor, 16-second angular contact bearing, 17-support plate, 18-end cover, 19-shaft shoulder, 20-base waist groove. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1 、 2, 3, and 4, this embodiment provides a high-precision two-axis automatic grinding wheel dresser,

[0026] The high-precision two-axis automatic grinding wheel dresser of the present invention comprises a base 6, a fixed axis system of a diamond roller 10 disposed on the left side of the base 6, a rotary axis 4 disposed on the base 6, a power unit 9 disposed on the base 6, and a power transmission unit 3 connecting the power unit 9 and the fixed axis system of the diamond roller 10. All of the above mechanisms or units are directly or indirectly placed on the base 6. The support surface at the bottom end of the base 6 is designed to be large enough to prevent the dresser from tipping over.

[0027] The Diamond Roller 10 shaft 1 system utilizes a multi-step design, allowing for the placement of two pairs of angular contact ball bearings in the middle of the shaft system. These two pairs of bearings are separated by a shoulder 19 located in the center of the inner side of the shaft system housing 2 and an external collar. One end of the bearing pair is secured and sealed with a bearing end cap 18 and a locking nut, while the other end is secured and sealed together with the shoulder 19 and bearing end cap 18, ensuring a certain axial offset within the shaft system. The Diamond Roller 10 is affixed to the right side of the Diamond Roller 10 shaft 1, secured axially by a collar and a locking nut. A coolant diversion module 11 is located behind the Diamond Roller 10. Coolant pipelines are inserted into the upper and lower sections of the front of the module, with the pipeline outlets aligned with the Diamond Roller 10 for cooling. The left side of the Diamond Roller 10 shaft 1 extends into the power transmission unit 3, connecting to the pulley 14 and receiving power from the motor 15.

[0028] The shape of the shaft system housing 2 is a cylindrical body with a hole and two feet on the side, and the bottom ends of the two feet fit on the square boss of the front turntable 5, that is, the shaft system housing 2 is fixed to the front shaft disk, and indirectly fixed to the base 6. In the rotary shaft 4 system, the rotary shaft 4 connects the front turntable 5, the base 66 and the rear turntable 7. The head of the base 6 is a vertical cylindrical body with a hole, and a shoulder 19 is provided in front of the inner hole. A circular groove is designed at the back of the front turntable 5. The space formed by the shoulder 19 and the groove is used to place the highest shoulder 19 of the rotary shaft 4. A second angular contact bearing and an end cover 18 are added to axially constrain the rotary shaft 4. At this time, the rotary shaft 4 has reached a state where it can work. The rear turntable 7 is assembled on the left side of the rotary shaft 44. The two are positioned by the shoulder 19, and the leftmost end is axially fixed to the rear turntable 7 by a locking screw and a gasket.

[0029] The main shape of the rear turntable 7 is a combination of a perforated cylinder and a square platform. It is a lightweight design. The outer diameter of the front side of the perforated cylinder is equal to the outer diameter of the upper cylindrical part of the base 6, while the outer diameter of the rear side of the perforated cylinder is reduced but the inner hole diameter remains unchanged, forming a shape similar to the shaft shoulder 19. At the same time, four reinforcing ribs are added to enhance the rigidity. The outer diameter of the perforated cylinder on the right side of the front turntable 5 is equal to the outer diameter of the upper cylindrical part of the base 6, that is, the size of the perforated cylindrical part of the front turntable 5, the perforated cylindrical part at the top of the base 6 and the same part of the rear turntable 7 are consistent. The function of the rotary shaft 4 system is to realize the rotation of the front turntable 5 and the rear turntable 77 relative to the base 6, and finally realize the rotation of the diamond roller 10. The rotation range is through four evenly distributed screws 12, which pass through the perforated cylinders of the front turntable 5, the top of the base 6 and the rear turntable 7. The base 6 is opened as Figure 4 The uniformly distributed rotating waist grooves shown are used to limit the rotation range of the rotary shaft 4. Cut off a piece of the same size at the top of the three to obtain Figure 1 The platform is composed of three top planes, which is used to place subsequent high-precision angle measurement devices.

[0030] In the power unit 9, the motor 15 is placed on the square platform of the rear turntable 7, and the position fine-tuning mechanism of the motor 15 realizes the position change of the motor 15 by fine-tuning the position of the motor 15 seat. A pulley 14 in the power transmission unit 3 is connected to the shaft end of the motor 15 to realize power output. The square platform of the rear turntable 7, the leftmost plane of the front turntable 5, and the end cover 18 at one end of the pulley 14 fixed to the shaft 11 of the diamond roller 10 are all fixed on the connecting plate. The main shape of the connecting plate can be observed from the side view. It is designed to be tilted from the top to the bottom from one end of the motor 15 to the end of the shaft 1 of the diamond roller 10, which greatly improves the space utilization. The power unit 9 and the power transmission unit 3 are both designed with protective covers to prevent the exposure of dangerous sources and protect the safety of workers.

[0031] The above is only a specific implementation method of the patent of the present invention, but the protection scope of the patent of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the patent of the present invention within the scope disclosed by the patent of the present invention, which falls within the protection scope of the patent of the present invention.

Claims

1. A high-precision two-axis automatic grinding wheel dresser, characterized by: The high-precision two-axis automatic grinding wheel dresser includes a base, a diamond roller fixed shaft system arranged on the left side of the base, a rotary shaft system arranged on the base, a power unit arranged on the base, and a power transmission unit connecting the power unit and the diamond roller fixed shaft system; the rotary shaft system includes a rotary shaft, a front turntable and a rear turntable respectively arranged on the rotary shaft from left to right, the base is arranged between the front turntable and the rear turntable, a second angular contact bearing is arranged between the base and the rotary shaft, the front turntable A screw is axially passed through the turntable, the base and the rear turntable; the second angular contact bearing and the end cover with axial constraint are provided on the rotating shaft; the shaft is provided with a shoulder which is conducive to the axial positioning of the rear turntable; the front turntable, the base and the rear turntable are respectively provided with a front turntable through hole, a base waist groove and a rear turntable through hole for the screw to pass through in sequence, and the rotation angle range of the front turntable and the rear turntable relative to the base is equal to the angle range of the front turntable and the rear turntable relative to the base when the screw is at the leftmost and rightmost sides of the base waist groove.

2. The high-precision two-axis automatic grinding wheel dresser according to claim 1, characterized in that: The diamond roller fixed shaft system includes a diamond roller shaft for mounting the diamond roller, a shaft system housing arranged on the diamond roller shaft, and a first angular contact bearing arranged between the diamond roller shaft and the shaft system housing.

3. The high-precision two-axis automatic grinding wheel dresser according to claim 2, characterized in that: A coolant diversion module is provided on the rotary shaft system at the position of the diamond roller shaft.

4. The high-precision two-axis automatic grinding wheel dresser according to claim 1, characterized in that: The front turntable, the base and the rear turntable are provided with angle measuring devices located on the top surface of the front turntable, the top surface of the base and the top surface of the rear turntable, and the installation plane where the angle measuring devices are located is set horizontally.

5. The high-precision two-axis automatic grinding wheel dresser according to claim 1, characterized in that: The power unit includes a motor seat mechanism installed on the base and a motor arranged on the motor seat mechanism.

6. The high-precision two-axis automatic grinding wheel dresser according to claim 1, characterized in that: The power transmission unit includes a transmission belt connecting the power unit and the diamond roller fixed shaft system, two pulleys matched with the transmission belt, and a support plate installed between the power unit and the diamond roller fixed shaft system.

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