CN112589474B - Thermal expansion machine tool precision retaining device - Google Patents
Thermal expansion machine tool precision retaining device Download PDFInfo
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- CN112589474B CN112589474B CN202011448723.XA CN202011448723A CN112589474B CN 112589474 B CN112589474 B CN 112589474B CN 202011448723 A CN202011448723 A CN 202011448723A CN 112589474 B CN112589474 B CN 112589474B
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- Prior art keywords
- thermal expansion
- guide rail
- working platform
- machine tool
- precision
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
- B23Q1/015—Frames, beds, pillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
- B23Q1/017—Arrangements of ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/03—Stationary work or tool supports
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention discloses a thermal expansion machine tool precision retaining device, which belongs to the field of machine tools and comprises a machine tool body and a main guide rail arranged on the machine tool body, wherein the main guide rail is provided with a working platform in sliding connection with the main guide rail; the precision maintaining device comprises auxiliary guide rails which are arranged on two sides of the main guide rail and are parallel to the main guide rail and a precision maintaining block which is arranged between the auxiliary guide rails and the working platform, wherein the precision maintaining block is in sliding connection with the auxiliary guide rails in the direction parallel to the auxiliary guide rails, and the precision maintaining block is in sliding connection with the working platform in the direction perpendicular to the auxiliary guide rails.
Description
Technical Field
The invention relates to the field of machine tools, in particular to a thermal expansion machine tool precision retaining device.
Background
In order to adapt to multi-station processing to improve production efficiency, the traditional PCB drilling machine and milling machine are designed to have larger equipment volume, and in order to keep the precision stability of the equipment, a machine body generally adopts natural granite, and a workbench generally adopts a metal material. However, the common engineering materials have the problem of thermal expansion deformation, such as the typical thermal expansion coefficient of steel is 10 x 10 < -6 > m/m, the thermal expansion coefficient of aluminum alloy is 22 x 10 < -6 > m/m, under the condition that the temperature rises by 1 ℃ per liter, a steel beam with the length of 1 meter expands by 10 micrometers, and an aluminum alloy beam with the length of 1 meter expands by 22 micrometers. The expansion of the working table inevitably causes the corresponding stress deformation problem, so that the precision of the structural part is changed or the abrasion of the guide rail is aggravated, and the service life is reduced.
The existing enterprises generally adopt the structures of the middle main guide rail and the air floatation feet at two sides to ensure that the precision of the equipment cannot deform and seriously lose when the temperature changes, and the workbench automatically stretches and retracts along with the air floatation feet at two sides when the temperature changes, so that the precision of the equipment is kept stable. Although the problem of thermal expansion is solved by adopting the air floatation pin scheme, a large amount of compressed air is consumed in the working process of the air floatation pin, and the energy consumption is huge. The annual energy consumption of the six-axis drilling machine is about 10 ten thousand yuan, and the equipment operation cost and the production cost are greatly improved.
Disclosure of Invention
The invention provides a thermal expansion machine tool precision keeping device aiming at the problems of huge energy consumption and higher production cost caused by the adoption of an air floatation pin in the prior art, and the specific technical scheme is as follows:
a thermal expansion machine tool precision maintaining device comprises a machine tool body and a main guide rail arranged on the machine tool body, wherein a working platform connected with the main guide rail in a sliding manner is arranged on the main guide rail, and precision maintaining devices are arranged on two sides of the main guide rail and between the machine tool body and the working platform;
the precision maintaining device comprises auxiliary guide rails which are arranged on two sides of the main guide rail and are parallel to the main guide rail and a precision maintaining block which is arranged between the auxiliary guide rails and the working platform, wherein the precision maintaining block is connected with the auxiliary guide rails in a sliding mode in a direction parallel to the auxiliary guide rails, and the precision maintaining block is connected with the working platform in a sliding mode in a direction perpendicular to the auxiliary guide rails.
Preferably, the precision maintaining block is provided with a thermal expansion guide rail perpendicular to the auxiliary guide rail, and the bottom end of the worktable is provided with a thermal expansion absorbing block slidably connected with the thermal expansion guide rail.
Preferably, the working platform comprises an outer frame, a longitudinal support frame arranged in the outer frame and parallel to the main guide rail, and a transverse support frame arranged in the outer frame and perpendicular to the main guide rail.
Preferably, the thermal expansion absorption block is arranged at the bottom end of the transverse support frame and is in sliding connection with the thermal expansion guide rail.
Preferably, a reinforcing frame is arranged between the longitudinal supporting frame and the transverse supporting frame.
Preferably, the precision maintaining block is also provided between the reinforcing frame and the auxiliary rail.
Preferably, a thermal expansion absorption block slidably connected to the precision retention block is also provided between the bottom end of the reinforcement frame and the auxiliary guide rail.
Preferably, the machine tool body is a granite machine body.
The invention has the following beneficial effects:
the working platform is connected with the auxiliary guide rail in a sliding mode in the direction parallel to the auxiliary guide rail, and the working platform is connected with the precision maintaining block in a sliding mode in the direction perpendicular to the auxiliary guide rail, so that the working platform can slide in the laying direction of the main guide rail and can also slide in the direction perpendicular to the main guide rail. Therefore, when the working platform expands due to heating, the working platform body slides relatively in the direction perpendicular to the main guide rail to absorb the deformation caused by expansion, and the structure parallel to the main guide rail can maintain the original relative position of the working platform due to higher rigidity. When the working platform is cooled and contracted, the working platform body is contracted to the initial position without causing the loosening of the structure, so that the working platform and the related connecting structural members are protected, and the matching precision of the working platform and the related connecting structural members is maintained.
The invention perfectly solves the problems of stress deformation and precision change of the machine tool working platform during thermal expansion and contraction, and obtains better technical effect. Besides the first investment of the precision maintaining device, the invention has no energy consumption problem in use any more, and greatly reduces the equipment operation cost and the production cost.
Drawings
FIG. 1 is a schematic structural view of a thermal expansion machine tool precision maintaining device according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view of B in fig. 1.
In the figure: 1-a machine tool body; 2-a primary rail;
3-a working platform; 31-outer frame; 32-longitudinal support frame; 33-a transverse support;
4-precision maintaining means; 41-an auxiliary guide rail; 42-precision maintenance block; 43-a thermal expansion rail; 44-a thermal expansion absorption block;
5-reinforcing frame.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present invention, the terms "upper", "lower", "front", and "rear", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1, the present embodiment provides a thermal expansion machine tool precision maintaining device, which includes a machine tool body 1 made of granite and two sets of main guide rails 2 arranged on the top side of the machine tool body 1, wherein the machine tool body 1 is made of granite material without considering the thermal expansion problem of the machine tool body 1. Two sets of main guide rails 2 are arranged in parallel, and the main guide rails 2 are provided with a working platform 3 which is connected with the main guide rails in a sliding manner, so that a worker can control the working platform 3 to slide back and forth along the laying direction of the main guide rails 2, namely along the longitudinal direction of the machine tool body 1.
Referring to fig. 1 to 2, precision maintaining devices 4 are arranged on two sides of the main guide rail 2 and between the machine tool body 1 and the working platform 3, and the precision maintaining devices 4 are used for maintaining and stabilizing the working precision of the working platform 3 in the thermal expansion process. The precision maintaining device 4 comprises auxiliary guide rails 41 which are arranged on two sides of the main guide rail 2 and are parallel to the main guide rail 2, and a precision maintaining block 42 which is arranged between the auxiliary guide rails 41 and the working platform 3, wherein the precision maintaining block 42 is connected with the auxiliary guide rails 41 in a sliding mode in a direction parallel to the auxiliary guide rails 41, and the precision maintaining block 42 is connected with the working platform 3 in a sliding mode in a direction perpendicular to the auxiliary guide rails 41. The working platform 3 can slide along the laying direction of the main guide rail 2 and can also slide along the direction vertical to the main guide rail 2.
The top side of the precision maintaining block 42 is provided with a thermal expansion guide rail 43 which is vertical to the auxiliary guide rail 41, the bottom end of the workbench is provided with a thermal expansion absorption block 44 which is connected with the thermal expansion guide rail 43 in a sliding way, and the invention realizes the function that the precision maintaining block 42 is connected with the working platform 3 in the direction vertical to the auxiliary guide rail 41 in a sliding way through the longitudinal sliding fit of the thermal expansion absorption block 44 and the thermal expansion guide rail 43. Therefore, when the working platform 3 is heated to expand, the working platform 3 slides relatively along the direction perpendicular to the main guide rail 2 through the thermal expansion absorption block 44, so as to absorb the deformation caused by the expansion of the working platform 3, and the original relative position of the working platform 3 can be maintained due to the higher rigidity of the structure of the working platform 3 parallel to the direction of the main guide rail 2. When the working platform 3 is cooled and contracted, the body of the working platform 3 transversely slides along the thermal expansion guide rail 43 through the thermal expansion absorption block 44, and is contracted to the initial position without causing the loosening of the structure, thereby protecting the working platform 3 and related connecting structural components and maintaining the matching precision of the working platform 3 and the related connecting structural components.
Referring to fig. 1, the working platform 3 includes an outer frame 31 having a square shape, a longitudinal support frame 32 disposed in the outer frame 31 and parallel to the main guide rail 2, and a transverse support frame 33 disposed in the outer frame 31 and perpendicular to the main guide rail 2. According to the invention, the working platform 3 is set to be a grid type platform consisting of the longitudinal support frame 32, the transverse support frame 33 and the outer frame 31, so that expansion allowance exists in the thermal expansion process of the working platform 3, and the precision loss of the working platform 3 during thermal expansion is further reduced. Meanwhile, the thermal expansion absorption block 44 is arranged at the bottom end of the transverse support frame 33 and is in sliding connection with the thermal expansion guide rail 43, so that the thermal expansion absorption block 44 can perform targeted absorption on the transverse support frame 33 with the maximum expansion amount in the thermal expansion process, and the absorption effect of the thermal expansion absorption block 44 on the thermal expansion deformation of the working platform 3 is optimized.
Referring to fig. 1 to 3, a reinforcing frame 5 for enhancing the rigidity of the working platform 3 is arranged between the longitudinal supporting frame 32 and the transverse supporting frame 33, so that the structural rigidity and the structural strength of the working platform 3 in the thermal expansion process are improved. The precision maintaining block 42 is also provided between the reinforcing frame 5 and the auxiliary rail 41. A thermal expansion absorption block 44 connected with the precision maintaining block 42 in a sliding manner is also arranged between the bottom end of the reinforcing frame 5 and the auxiliary guide rail 41, so that when the reinforcing frame 5 expands due to heating, the reinforcing frame 5 slides relatively along the direction vertical to the main guide rail 2 through the thermal expansion absorption block 44, and further absorbs the deformation caused by expansion of the reinforcing frame 5. When the reinforcing frame 5 is shrunk by cooling, the reinforcing frame 5 is shrunk to the original position without causing a loose structure of the reinforcing frame 5 by the thermal expansion absorption block 44 sliding laterally along the thermal expansion guide rail 43.
The working platform 3 is slidably connected with the auxiliary guide rail 41 in a direction parallel to the auxiliary guide rail 41, and is slidably connected with the working platform 3 in a direction perpendicular to the auxiliary guide rail 41, so that the working platform 3 can slide in a direction perpendicular to the main guide rail 2 while sliding in the laying direction of the main guide rail 2 by the precision maintaining block 42. Therefore, when the working platform 3 is heated to expand, the body of the working platform 3 slides relatively along the direction perpendicular to the main guide rail 2 to absorb the deformation caused by the expansion, and the structure parallel to the direction of the main guide rail 2 can maintain the original relative position of the working platform 3 due to higher rigidity. When the working platform 3 is cooled and contracted, the body of the working platform 3 is contracted to the initial position without causing the loosening of the structure, thereby protecting the working platform 3 and the related connecting structural members and maintaining the matching precision. The invention perfectly solves the problems of stress deformation and precision change of the machine tool working platform 3 during thermal expansion and contraction, and obtains better technical effect. Besides the first investment of the precision maintaining device 4, the invention has no energy consumption problem in use any more, and greatly reduces the production cost.
It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in an article or device comprising the element.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The device for maintaining the precision of the thermal expansion machine tool is characterized by comprising a machine tool body (1) and a main guide rail (2) arranged on the machine tool body (1), wherein the main guide rail (2) is provided with a working platform (3) in sliding connection with the main guide rail, and precision maintaining devices (4) are arranged on two sides of the main guide rail (2) and between the machine tool body (1) and the working platform (3);
the precision maintaining device (4) comprises auxiliary guide rails (41) which are arranged on two sides of the main guide rail (2) and are parallel to the main guide rail (2) and a precision maintaining block (42) which is arranged between the auxiliary guide rails (41) and the working platform (3), wherein the precision maintaining block (42) is in sliding connection with the auxiliary guide rails (41) in the direction parallel to the auxiliary guide rails (41), and the precision maintaining block (42) is in sliding connection with the working platform (3) in the direction perpendicular to the auxiliary guide rails (41);
a thermal expansion guide rail (43) which is vertical to the auxiliary guide rail (41) is arranged on the precision maintaining block (42), and a thermal expansion absorption block (44) which is in sliding connection with the thermal expansion guide rail (43) is arranged at the bottom end of the working platform (3);
the working platform (3) comprises an outer frame (31) which is square in shape, a longitudinal support frame (32) which is arranged in the outer frame (31) and is parallel to the main guide rail (2), and a transverse support frame (33) which is arranged in the outer frame (31) and is vertical to the main guide rail (2); the working platform (3) is a grid type platform consisting of a longitudinal support frame (32), a transverse support frame (33) and an outer frame (31), so that expansion allowance exists in the working platform (3) in the thermal expansion process, and the precision loss of the working platform (3) during thermal expansion is further reduced.
2. The thermal expansion machine tool accuracy retaining device according to claim 1, wherein the thermal expansion absorption block (44) is provided at a bottom end of the lateral support frame (33) and is slidably connected to the thermal expansion guide rail (43).
3. A thermal expansion machine tool accuracy retaining device according to claim 1, characterized in that a reinforcing frame (5) is provided between the longitudinal support frame (32) and the lateral support frame (33).
4. A thermal expansion machine tool accuracy retaining device according to claim 3, wherein the accuracy retaining block (42) is also provided between the reinforcing frame (5) and the auxiliary rail (41).
5. The thermal expansion machine tool accuracy retaining device according to claim 4, wherein a thermal expansion absorption block (44) slidably connected to the accuracy retaining block (42) is also provided between the bottom end of the reinforcing frame (5) and the auxiliary guide rail (41).
6. Thermal expansion machine tool precision holding device according to claim 1, characterized in that the machine bed (1) is a granite bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448723.XA CN112589474B (en) | 2020-12-11 | 2020-12-11 | Thermal expansion machine tool precision retaining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448723.XA CN112589474B (en) | 2020-12-11 | 2020-12-11 | Thermal expansion machine tool precision retaining device |
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| CN112589474A CN112589474A (en) | 2021-04-02 |
| CN112589474B true CN112589474B (en) | 2023-04-14 |
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