A high-speed and high-precision single-drive gantry structure

Abstract

The embodiment of the present invention provides a high-speed and high-precision single-drive gantry structure, including an equipment frame, a first crossbeam assembly and a second crossbeam assembly, wherein the first crossbeam assembly and the second crossbeam assembly are slidably arranged on the equipment frame, and the equipment frame includes a first active side guide rail and a first driven side guide rail, and the first crossbeam assembly is slidably connected to the first active side guide rail and the first driven side guide rail at both ends along the X direction. The high-speed and high-precision single-drive gantry structure provided by the present invention can carry the first crossbeam assembly and the second crossbeam assembly at the same time. Here, the two-layer structure has good casting stability and meets the processing technology requirements for high precision requirements, and greatly reduces the precision loss caused by the impact of the acceleration and deceleration process during high-speed movement.

Description

Technical Field

[0001] The invention relates to the technical field of light industry production and manufacturing, and in particular to a high-speed and high-precision single-drive gantry structure. Background Art

[0002] The gantry structure, also known as the gantry machining center, refers to a machining center in which the spindle axis is set perpendicular to the worktable. The overall structure is a portal frame consisting of double columns and a top beam, with a cross beam in the middle. It is mainly suitable for processing large workpieces and workpieces with complex shapes. It is currently widely used in the field of light industrial production and manufacturing.

[0003] Generally, the gantry structure frame is constructed by profiles or square tube welding. Such structures cannot meet the processing technology required for high precision and cannot achieve good precision under high-speed operation. At the same time, the frame assembled by aluminum profiles is completely assembled and built manually during the assembly process. The installation surface accuracy and overall rigidity after assembly cannot reach the high-precision level. The frame welded by square tube will have certain deformation during the process of welding and flat grinding, and ultimately cannot meet the requirements of high speed and high precision. Summary of the invention

[0004] In order to solve the problem that the existing gantry structure is difficult to meet the processing technology requirements of high precision, the present invention provides a high-speed and high-precision single-drive gantry structure.

[0005] A high-speed and high-precision single-drive gantry structure comprises an equipment frame, a first crossbeam assembly and a second crossbeam assembly, wherein the first crossbeam assembly and the second crossbeam assembly are slidably arranged on the equipment frame, and is characterized in that the equipment frame comprises a first active side guide rail and a first driven side guide rail, and the first crossbeam assembly is slidably connected to the first active side guide rail and the first driven side guide rail at both ends along the X direction.

[0006] Furthermore, the equipment rack also includes a first Y-axis servo motor and a first ball screw that are assembled and connected to each other, and the first ball screw and the first beam assembly are slidably connected.

[0007] Furthermore, the equipment rack further includes a second active side guide rail and a second passive side guide rail, and two ends of the second crossbeam assembly along the X direction are slidably connected to the second active side guide rail and the second passive side guide rail respectively.

[0008] Furthermore, the equipment rack also includes a second Y-axis servo motor and a second ball screw that are assembled and connected to each other, and the second ball screw and the second beam assembly are slidably connected.

[0009] Furthermore, the first crossbeam assembly includes a first crossbeam body, on which a first X-axis auxiliary guide assembly and a first X-axis servo motor and a first drive assembly that are assembled and connected to each other are fixedly provided, and the bottom of the first crossbeam body is slidably connected to the first active side guide rail and the first driven side guide rail, respectively.

[0010] Furthermore, the first crossbeam assembly also includes a first load, and the bottom of the first load is slidably connected to the first driving assembly and the first X-axis auxiliary guide assembly respectively.

[0011] Further, the first load includes a first load body, a first Z-axis servo motor and a first Z-axis driving assembly, and the first Z-axis servo motor is slidably connected to the first load body through the first Z-axis driving assembly.

[0012] Furthermore, the second crossbeam assembly includes a second crossbeam body, on which a second X-axis auxiliary guide assembly and a second X-axis servo motor and a second drive assembly are fixedly mounted and connected to each other, and the bottom of the second crossbeam body is slidably connected to the second active side guide rail and the second driven side guide rail, respectively.

[0013] Furthermore, the second crossbeam assembly also includes a second load, and the bottom of the second load is slidably connected to the second driving assembly and the second X-axis auxiliary guide assembly respectively.

[0014] Furthermore, the second load includes a second load body, a second Z-axis servo motor and a second Z-axis driving assembly, and the second Z-axis servo motor is slidably connected to the second load body through the second Z-axis driving assembly.

[0015] The high-speed, high-precision single-drive gantry structure provided by the present invention includes an equipment frame and a first beam assembly and a second beam assembly that can be slidably arranged on the equipment frame along the Y direction. The first beam assembly and the second beam assembly are arranged up and down, and both use a high-strength aluminum alloy structure as the beam body. The first X-axis servo motor and the first drive assembly are mounted on the first beam assembly to ensure that the first load can move 490mm in the X direction, and the motion accuracy is guaranteed to be ±0.005 under the conditions of acceleration 1.2G and motion speed 1m / s; at the same time, the first Y-axis servo motor and the first ball screw are arranged on the equipment frame to drive the first beam assembly in a unilateral driving manner, so that the motion stroke in the Y direction reaches 390mm, and the flatness within the overall X and Y direction motion stroke range can be controlled within 0.02. Similarly, the repeatability positioning accuracy of the second load of the second beam assembly in the X direction and the flatness of the second beam assembly within the overall X and Y direction motion stroke range can achieve the precision effect of the first beam assembly.

[0016] Therefore, the high-speed and high-precision single-drive gantry structure provided by the present invention can carry a two-layer structure of a first beam assembly and a second beam assembly at the same time. The casting has good stability performance and has the processing technology requirements to meet high-precision requirements. It can greatly reduce the precision loss caused by the impact of the acceleration and deceleration process during high-speed movement. At the same time, different load structures can be built on the first beam body and the second beam body according to the application requirements of different equipment to achieve application on equipment of the same type, thereby ensuring its certain scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the high-speed and high-precision single-drive gantry structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the equipment support of the present invention;

[0019] Figure 3 is a schematic structural diagram of a first crossbeam assembly of the present invention;

[0020] Figure 4 is a schematic structural diagram of a first load of the present invention;

[0021] Explanation of the reference numerals: 1. Equipment frame; 2. First crossbeam assembly; 201. First crossbeam body; 202. First X-axis servo motor; 203. First drive assembly; 204. First X-axis auxiliary guide assembly; 205. First load; 2051. First load body; 2052. First Z-axis servo motor; 2053. First Z-axis drive assembly; 3. Second crossbeam assembly; 4. First Y-axis servo motor; 5. First ball screw; 6. First active side guide rail; 7. First driven side guide rail; 8. Second Y-axis servo motor; 9. Second ball screw; 10. Second active side guide rail; 11. Second driven side guide rail. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 and Figure 2As shown, according to an embodiment of the present invention, a high-speed and high-precision single-drive gantry structure includes an equipment frame 1, a first crossbeam assembly 2 and a second crossbeam assembly 3, wherein the first crossbeam assembly 2 and the second crossbeam assembly 3 can be slidably arranged on the equipment frame, specifically, the first crossbeam assembly 2 and the second crossbeam assembly 3 can move back and forth on the equipment frame 1 along the Y direction to complete a high-speed and stable movement process.

[0024] The equipment frame 1 includes a first active side guide rail 6 and a first driven side guide rail 7, both of which are arranged on the top of the equipment frame 1, and the two ends of the first crossbeam assembly 2 along the X direction are slidably connected to the first active side guide rail 6 and the first driven side guide rail 7. Specifically, the first active side guide rail 6 and the first driven side guide rail 7 are cooperatively connected with the slider structure arranged at the bottom of the first crossbeam assembly 2, providing auxiliary support and guiding effect for the first crossbeam assembly 2 to slide in the Y direction, so that the first crossbeam assembly 2 can still ensure its positioning accuracy under the condition of high-speed movement.

[0025] Furthermore, the equipment frame 1 also includes a first Y-axis servo motor 4 and a first ball screw 5 which are assembled and connected to each other, wherein the first ball screw 5 and the first cross beam assembly 2 are slidably connected together. The first ball screw 5 can convert the rotational motion of the internal rotor of the first Y-axis servo motor 4 into the linear motion of the rod body of the first ball screw 5, thereby driving the first cross beam assembly 2 to move back and forth along the rod body of the first ball screw 5, that is, in the Y direction, to ensure that the movement span of the first cross beam assembly 2 reaches 1070mm, and under the conditions of acceleration 1.2G and movement speed 1m / s, the repeatability positioning accuracy of ±0.005 can still be guaranteed.

[0026] Furthermore, the equipment rack further includes a second active side rail 10 and a second driven side rail 11, which are arranged on both sides of the middle of the equipment rack 1 in the vertical direction, and the two ends of the second crossbeam assembly 3 along the X direction are slidably connected to the second active side rail 10 and the second driven side rail 11. Specifically, the second active side rail 10 and the second driven side rail 11 are cooperatively connected with the slider structure arranged at the bottom of the second crossbeam assembly 3, providing auxiliary support and guiding for the second crossbeam assembly 3 to slide in the Y direction, so that the second crossbeam assembly 3 can still ensure its positioning accuracy under high-speed movement.

[0027] Furthermore, the equipment frame 1 also includes a second Y-axis servo motor 8 and a second ball screw 9 which are assembled and connected to each other, wherein the second ball screw 9 and the second beam assembly 3 are slidably connected together. The second ball screw 9 can convert the rotational motion of the internal rotor of the second Y-axis servo motor 8 into the linear motion of the rod body of the second ball screw 9, thereby driving the second beam assembly 3 to move back and forth along the rod body of the second ball screw 9, that is, in the Y direction, to ensure that the movement span of the second beam assembly 3 reaches 1070mm, and under the conditions of acceleration 1.2G and movement speed 1m / s, the repeatability positioning accuracy of ±0.005 can still be guaranteed.

[0028] See also Figure 3 As shown, according to an embodiment of the present invention, the first beam assembly 2 includes a first beam body 201, the first beam body 201 is fixedly provided with a first X-axis auxiliary guide assembly 204 and a first X-axis servo motor 202 and a first drive assembly 203 that are assembled and connected to each other, and the bottom of the first beam body 201 is slidably connected to the first active side guide rail 6 and the first driven side guide rail 7. Specifically, a slider structure is fixedly provided at the bottom of the first beam body 201, and the slider structure is cooperatively connected with the first active side guide rail 6 and the first driven side guide rail 7 to provide auxiliary support and guidance for the first beam assembly 2 to slide in the Y direction.

[0029] Furthermore, the first crossbeam assembly 2 also includes a first load 205, and the bottom of the first load 205 is slidably connected to the first drive assembly 203 and the first X-axis auxiliary guide assembly 204. The first X-axis auxiliary guide assembly 204 and the first X-axis servo motor 202 and the first drive assembly 203 that are assembled and connected to each other are all arranged on the upper surface of the first crossbeam body 201. The first X-axis servo motor 202 and the first drive assembly 203 provide driving power for the first load 205, and the first X-axis auxiliary guide assembly 204 provides auxiliary support and guidance for the first load 205, so that the first load 205 can still ensure its positioning accuracy under high-speed movement.

[0030] See also Figure 4As shown, according to an embodiment of the present invention, the first load 205 includes a first load body 2051, a first Z-axis servo motor 2052 and a first Z-axis driving assembly 2053, and the first Z-axis servo motor 2052 is slidably connected to the first load body 2051 through the first Z-axis driving assembly 2053. Specifically, the first Z-axis servo motor 2052 and the first Z-axis driving assembly 2053 are cooperatively connected, and the first Z-axis servo motor 2052 drives the first Z-axis driving assembly 2053 to achieve up and down movement, thereby achieving the movement and positioning effect of the first load 205 in the Z direction. In addition, in addition to setting the first load 205, the first beam assembly 2 can also set other load structures according to the application of different equipment requirements to achieve application on the same type of equipment.

[0031] Similar to the first crossbeam assembly 2, the second crossbeam assembly 3 includes a second crossbeam body, the second crossbeam body is fixedly provided with a second X-axis auxiliary guide assembly and a second X-axis servo motor and a second drive assembly that are assembled and connected to each other, and the bottom of the second crossbeam body is slidably connected to the second active side guide rail and the second driven side guide rail. Specifically, a slider structure is fixedly provided at the bottom of the second crossbeam body, and the slider structure is cooperatively connected with the second active side guide rail and the second driven side guide rail to provide auxiliary support and guidance for the second crossbeam assembly to slide in the Y direction.

[0032] Furthermore, the second crossbeam assembly also includes a second load, and the bottom of the second load is slidably connected to the second drive assembly and the second X-axis auxiliary guide assembly. The second X-axis auxiliary guide assembly and the second X-axis servo motor and the second drive assembly that are assembled and connected to each other are all arranged on the upper surface of the second crossbeam body, the second X-axis servo motor and the second drive assembly provide driving power for the second load, and the second X-axis auxiliary guide assembly provides auxiliary support and guidance for the second load, so that the second load can still ensure its positioning accuracy under high-speed movement.

[0033] Similar to the first load 205, the second load includes a second load body, a second Z-axis servo motor and a second Z-axis drive assembly, and the second Z-axis servo motor is slidably connected to the second load body through the second Z-axis drive assembly. Specifically, the second Z-axis servo motor and the second Z-axis drive assembly are cooperatively connected, and the second Z-axis servo motor drives the second Z-axis drive assembly to achieve up and down movement, thereby achieving the movement and positioning effect of the second load in the Z direction. In addition, in addition to setting the second load, the second beam assembly can also set other load structures according to the application requirements of different equipment to achieve application on equipment of the same type.

[0034] In summary, the high-speed, high-precision single-drive gantry structure provided by the present invention includes an equipment frame 1 and a first beam assembly 2 and a second beam assembly 3 that can be slidably arranged on the equipment frame 1 along the Y direction. The first beam assembly 2 and the second beam assembly 3 are arranged up and down, and both adopt a high-strength aluminum alloy structure as the beam body. The first X-axis servo motor 202 and the first drive assembly 203 are mounted on the first beam assembly 2 to ensure that the first load 205 can move 490mm in the X direction, and the movement accuracy is guaranteed to be ±0.005 under the conditions of acceleration 1.2G and movement speed 1m / s; at the same time, the first Y-axis servo motor 4 and the first ball screw 5 are arranged on the equipment frame 1 to drive the first beam assembly 2 in a unilateral driving manner, so that its movement stroke in the Y direction reaches 390mm, and the flatness within the overall movement stroke range of the X and Y directions can be controlled within 0.02. Similarly, the repeatability of the second load of the second beam assembly 3 in the X direction and the flatness of the second beam assembly 3 within the overall X and Y direction motion range can achieve the same precision as the first beam assembly 2 .

[0035] Therefore, the high-speed and high-precision single-drive gantry structure provided by the present invention can carry the first beam assembly 2 and the second beam assembly 3 at the same time. The two-layer structure has good casting stability and has the processing technology requirements to meet high-precision requirements. It can greatly reduce the precision loss caused by the impact of the acceleration and deceleration process during high-speed movement. At the same time, different load structures can be built on the first beam body 201 and the second beam body according to the application requirements of different equipment to achieve application on equipment of the same type, thereby ensuring its certain scalability.

[0036] Of course, the above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the basic principles of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A high-speed and high-precision single-drive gantry structure, comprising an equipment frame, a first beam assembly and a second beam assembly, wherein the first beam assembly and the second beam assembly are slidably arranged on the equipment frame, characterized in that: The equipment rack comprises a first active side guide rail and a first driven side guide rail, both of which are arranged on the top of the equipment rack; two ends of the first crossbeam assembly along the X direction are slidably connected to the first active side guide rail and the first driven side guide rail respectively; The equipment rack further comprises a second active side guide rail and a second driven side guide rail, which are arranged on both sides of the middle of the equipment rack in the vertical direction; the two ends of the second crossbeam assembly along the X direction are slidably connected to the second active side guide rail and the second driven side guide rail respectively; The equipment rack further comprises a first Y-axis servo motor and a first ball screw which are assembled and connected to each other, and the first ball screw and the first crossbeam assembly are slidably connected; The equipment rack further comprises a second Y-axis servo motor and a second ball screw which are assembled and connected to each other, and the second ball screw and the second crossbeam assembly are slidably connected; The first crossbeam assembly comprises a first crossbeam body, the first crossbeam body is fixedly provided with a first X-axis auxiliary guide assembly and a first X-axis servo motor and a first drive assembly which are assembled and connected to each other, and the bottom of the first crossbeam body is slidably connected to the first active side guide rail and the first driven side guide rail respectively; The second crossbeam assembly comprises a second crossbeam body, the second crossbeam body is fixedly provided with a second X-axis auxiliary guide assembly and a second X-axis servo motor and a second drive assembly which are assembled and connected to each other, and the bottom of the second crossbeam body is slidably connected to the second active side guide rail and the second driven side guide rail respectively; The first crossbeam assembly and the second crossbeam assembly are arranged up and down, and both adopt a high-strength aluminum alloy structure as the crossbeam body.

2. The high-speed and high-precision single-drive gantry structure according to claim 1 is characterized in that: The first crossbeam assembly also includes a first load, and the bottom of the first load is slidably connected to the first driving assembly and the first X-axis auxiliary guide assembly respectively.

3. The high-speed and high-precision single-drive gantry structure according to claim 2 is characterized in that: The first load includes a first load body, a first Z-axis servo motor and a first Z-axis driving assembly, and the first Z-axis servo motor is slidably connected to the first load body through the first Z-axis driving assembly.

4. The high-speed and high-precision single-drive gantry structure according to claim 1 is characterized in that: The second crossbeam assembly also includes a second load, and the bottom of the second load is slidably connected to the second driving assembly and the second X-axis auxiliary guide assembly respectively.

5. The high-speed and high-precision single-drive gantry structure according to claim 4 is characterized in that: The second load includes a second load body, a second Z-axis servo motor, and a second Z-axis driving assembly, and the second Z-axis servo motor is slidably connected to the second load body through the second Z-axis driving assembly.

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