CN114102165B - Stretching method for pre-stretching lead screw of large gantry machining center - Google Patents
Stretching method for pre-stretching lead screw of large gantry machining center Download PDFInfo
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- CN114102165B CN114102165B CN202111247200.3A CN202111247200A CN114102165B CN 114102165 B CN114102165 B CN 114102165B CN 202111247200 A CN202111247200 A CN 202111247200A CN 114102165 B CN114102165 B CN 114102165B
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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
- B23Q1/015—Frames, beds, pillars
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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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
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Abstract
The invention discloses a large dragonA stretching method for pre-stretching a lead screw of a door machining center belongs to the technical field of large gantry machining center lead screw machining, and comprises a lathe bed, and is characterized in that an optical collimator matched with an optical reflector for use is arranged on the outer side of the end part of the lathe bed, the optical collimator is arranged on an adjusting frame, and a front end bearing seat and a tail end bearing seat for fastening and fixing the lead screw are respectively arranged at the front end and the rear end of the upper end surface of the lathe bed; a preset number of adjusting sizing blocks for supporting and lifting the bed body are symmetrically arranged below the bed body; the length of the lead screw is L under the action of elastic deformation of the lathe bed 1 Is stretched to L 2 The required stretching amount E is obtained by increasing the numerical value, and the invention has the beneficial effects that: the large gantry machining center screw rod is prestretched by utilizing elastic deformation of the machine body, the stress is uniform, the linear effect is good, the accuracy is high, the large gantry machining center screw rod can be locked at one time, only the level of the machine body needs to be adjusted, and the quality and the precision of the locking nut are not damaged.
Description
The technical field is as follows:
the invention belongs to the technical field of large gantry machining center lead screw machining, and particularly relates to a stretching method for prestretching a lead screw of a large gantry machining center.
Background art:
the ball screw is used as a main transmission part of a numerical control machine tool, and can generate a large amount of heat in the working process, so that the ball screw expands and extends under the action of heat, and the transmission precision of the ball screw is changed, so that the ball screw needs to be pre-stretched in the assembly process of a machine tool to offset the thermal extension of the machine tool in the use process.
The pre-stretching of the ball screw is mainly realized by grinding a gasket of a bearing sleeve at the tail end and screwing a locking nut with an over-torque. The two pre-stretching methods have the main defects that a tail end bearing seat structure required by a method for grinding a bearing sleeve gasket is complex, and the requirements on the processing and measuring precision of parts are high; the super-torque screwing locking nut method has a good pretensioning effect on the lead screw of a small and medium-sized machine tool, but wastes time and labor when the lead screw of a large-stroke and large-diameter large gantry is pretensioned, and the locking nut needs to be dismounted and mounted for many times, so that the precision of the locking nut is damaged. The two methods can not realize the quick pre-stretching of the gantry screw and have higher requirements on skills of assembly personnel.
The invention content is as follows:
in order to solve the problems and overcome the defects of the prior art, the invention provides the tool and the method for pre-stretching the lead screw of the large gantry machining center, which can effectively solve the problems that the pre-stretching of the large-stroke large-diameter lead screw of the large gantry is time-consuming and labor-consuming, the locking nut needs to be disassembled and assembled for many times, and the precision of the locking nut is damaged.
The specific technical scheme for solving the technical problems comprises the following steps: the tool for prestretching the lead screw of the large gantry machining center comprises a lathe bed and is characterized in that guide rails attached to the upper end surface of the lathe bed are symmetrically arranged on two sides of the lathe bed, a measuring slide block is arranged on the guide rails in a sliding manner, an optical reflector is arranged on the measuring slide block, an optical collimator matched with the optical reflector for use is arranged on the outer side of the end part of the lathe bed, the optical collimator is arranged on an adjusting frame,
the front end and the rear end of the upper end surface of the lathe bed are respectively provided with a front end bearing seat and a tail end bearing seat which are used for fastening and fixing the central screw;
and a preset number of adjusting sizing blocks used for supporting and lifting the bed body are symmetrically arranged below the bed body.
Furthermore, the lathe bed be ferrous metal material.
Further, the length of the lathe bed is more than 8000 mm.
Further, the ratio of the length of the bed body, the width of the bed body and the height of the bed body is as follows: 800:150-200:600-700.
Furthermore, the width of the guide rail is 50-60mm, and the length of the guide rail is consistent with the length of the bed body.
The stretching method of the tool for pre-stretching the lead screw of the large gantry machining center comprises the following steps:
the method comprises the following steps: the front end bearing seat and the tail end bearing seat are rigidly connected and installed on the lathe bed, the positions of the front end bearing seat and the tail end bearing seat are at equal height, and the state is an initial state;
step two: measuring the height of the position where the sliding block is located by using an optical collimator, and adjusting a sizing block below the lathe bed to enable the whole lathe bed to be in a concave state, wherein the difference between the height of a front-end bearing seat and a tail-end bearing seat and the height of the middle of the lathe bed is H in the initial state and the concave state;
step three: two ends of a central screw rod are axially fixed on a front end bearing seat and a tail end bearing seat, and the installation length of the central screw rod is L 1 And then adjusting the bottom of the bed body to adjust the bed body from a concave state to an initial state by adjusting a sizing block below the bed body.
Further, the lathe bed 8 is adjusted from a concave state to an initial state, the length of the lead screw is adjusted from L under the action of elastic deformation of the lathe bed 1 Is stretched to L 2 Increasing the value to obtain the required stretching amount E, and calculating the height difference value H according to a calculation formula
Determining;
the invention has the beneficial effects that:
the invention prestretches the large gantry machining center screw by utilizing the elastic deformation of the machine body, the large gantry machining center screw is uniform in stress, good in linear effect and high in accuracy, the large gantry machining center screw can be locked at one time, only the machine body level needs to be adjusted, and the quality and the precision of the locking nut are not damaged.
Description of the drawings:
FIG. 1 is a schematic of the present invention;
fig. 2 is a schematic diagram of the working principle of the invention. In the drawings:
1. the device comprises a front-end bearing seat, a central screw rod, a tail-end bearing seat, an optical collimator, an adjusting frame, an adjusting sizing block, a guide rail, an optical reflector, a measuring slide block and a lathe bed, wherein the front-end bearing seat is 2, the central screw rod is 3, the tail-end bearing seat is 4, the optical collimator is 5, the adjusting frame is 6, the adjusting sizing block is 6, the guide rail is 7, the optical reflector is 8, the measuring slide block is 9, and the lathe bed is 10.
The specific implementation mode is as follows:
in the description of the invention, specific details are given only to enable a full understanding of the embodiments of the invention, but it should be understood by those skilled in the art that the invention is not limited to these details for the implementation. In other instances, well-known structures and functions have not been shown or described in detail to avoid obscuring aspects of embodiments of the invention. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The specific implementation mode of the invention is as follows:
the tool for prestretching the lead screw of the large gantry machining center comprises a machine body 10 and is characterized in that guide rails 7 attached to the upper end face of the machine body 10 are symmetrically arranged on two sides of the machine body 10, a measuring slide block 9 is arranged on the guide rails 7 in a sliding manner, an optical reflector 8 is arranged on the measuring slide block 9, an optical collimator 4 matched with the optical reflector 8 for use is arranged on the outer side of the end part of the machine body 10, the optical collimator 4 is arranged on an adjusting frame 5,
the front end bearing seat 1 and the rear end bearing seat 3 are respectively arranged at the front end and the rear end of the upper end face of the lathe bed 10 and are used for fastening and fixing the central screw rod 2;
and a preset number of adjusting sizing blocks 6 for supporting and lifting the bed body 10 are symmetrically arranged below the bed body 10.
Further, the lathe bed 10 is made of ferrous metal.
Further, the length of the lathe bed 10 is more than 8000 mm.
Further, the ratio of the length of the bed 10, the width of the bed 10 and the height of the bed 10 is 800: 150-.
Further, the width of the guide rail 7 is 50-60mm, and the length of the guide rail is consistent with the length of the bed 10.
Further, the stretching method of the tool for pre-stretching the lead screw of the large gantry machining center comprises the following steps:
the method comprises the following steps: the front end bearing seat 1 and the tail end bearing seat 3 are rigidly connected and installed on the lathe bed 10, the positions of the front end bearing seat 1 and the tail end bearing seat 3 are at the same height, and the state is an initial state;
step two: measuring the height of the position of a measuring slide block 9 by using an optical collimator 4, and adjusting a sizing block 6 below an adjusting bed body 10 to enable the whole bed body 10 to be in a concave state, wherein the difference between the height of a front-end bearing seat 1 and a tail-end bearing seat 3 and the height of the middle of the bed body 10 is H in the initial state and the concave state;
step three: the two ends of a central screw rod 2 are axially fixed on a front end bearing seat 1 and a tail end bearing seat 3, and the installation length of the central screw rod 2 is L 1 Then the bed body 10 is adjusted from a concave state by adjusting the sizing block 6 below the bed body 10And the whole state is the initial state.
Further, the lathe bed 10 is adjusted from a concave state to an initial state, the length of the central lead screw 2 is L under the action of elastic deformation of the lathe bed 10, and the length of the central lead screw 2 is L 1 Is stretched to L 2 Increasing the value to obtain the required stretching amount E, and calculating the height difference value H according to a calculation formula
When in use, the method comprises the following specific operations:
the material of the lathe bed 10 is limited to ferrous metal material;
taking a gantry machining center with the model G6532 as an example, the length of a lathe bed for mounting a lead screw is 8100mm, the width is 1700mm, and the height is 660 mm; the width of the line rail is 55mm, and the length of the line rail is 8100mm consistent with that of the lathe bed; the diameter of the lead screw is 100mm, and the initial length is 7500 mm.
The prestretching amount of the screw required to be achieved is 0.09mm according to the requirements of screw manufacturers, and then the prestretching amount is calculated according to a formula
It can be known that the horizontal height difference H between the middle position and the two end positions of the bed body should be 18.742 mm.
The method comprises the following steps: the front end bearing seat 1 and the tail end bearing seat 3 are rigidly connected and installed on the lathe bed 10, the positions of the front end bearing seat 1 and the tail end bearing seat 3 are at equal height, and the state is an initial state;
step two: measuring the height of the position of the measuring slide block 9 by using an optical collimator 4, and adjusting the sizing block 6 below the bed body 10 to enable the whole bed body 10 to be in a concave state, wherein in the initial state and the concave state, the difference between the height of the front-end bearing seat 1 and the tail-end bearing seat 3 and the height of the middle of the bed body 10 is 18.742 mm;
step three: two ends of a central screw rod 2 are axially fixed on a front end bearing seat 1 and a tail end bearing seat 3, and the installation length of the central screw rod 2 is L 1 7500mm, adjusting the bed body 10 from a concave state to an initial state by adjusting the sizing block 6 below the bed body 10, wherein the central screw 2 is elastically deformed in the bed body 10Under the action of the shape, the length of the central screw rod 2 is L 1 Is stretched to L of 7500mm 2 The increasing numerical value means that the prestretching amount is 0.09mm, and the production requirement is met.
The lead screw of the large gantry machining center is prestretched by utilizing elastic deformation of the machine body, the lead screw of the large gantry machining center is uniform in stress, good in linear effect and high in accuracy, once locking can be completed, only the level of the machine body needs to be adjusted, and the quality and the precision of the locking nut are not damaged.
Claims (6)
1. A stretching method for pre-stretching a lead screw of a large gantry machining center comprises a lathe bed (10), and is characterized in that guide rails (7) attached to the upper end face of the lathe bed (10) are symmetrically arranged on two sides of the lathe bed (10), a measuring slide block (9) is arranged on the guide rails (7) in a sliding mode, an optical reflector (8) is arranged on the measuring slide block (9), an optical collimator (4) matched with the optical reflector (8) in use is arranged on the outer side of the end portion of the lathe bed (10), the optical collimator (4) is arranged on an adjusting frame (5),
the front end and the rear end of the upper end surface of the lathe bed (10) are respectively provided with a front end bearing seat (1) and a tail end bearing seat (3) which are used for fastening and fixing a central screw (2);
a preset number of adjusting sizing blocks (6) for supporting and lifting the bed body (10) are symmetrically arranged below the bed body (10);
the stretching method of the tool for pre-stretching the lead screw of the large gantry machining center comprises the following steps:
the method comprises the following steps: the front end bearing seat (1) and the tail end bearing seat (3) are rigidly connected and installed on the lathe bed (10), the positions of the front end bearing seat (1) and the tail end bearing seat (3) are at equal height, and the state is an initial state;
step two: measuring the height of the position where the measuring slide block (9) is located by using an optical collimator (4), and adjusting a sizing block (6) below the lathe bed (10) to enable the lathe bed (10) to be in a concave state as a whole, wherein the difference between the height of the front-end bearing seat (1) and the height of the tail-end bearing seat (3) and the height of the middle of the lathe bed (10) is H in the initial state and the concave state;
step three: the two ends of the central screw (2) are axially fixed on the front end bearing seat (1) and the tail end bearing seat (3), the installation length of the central screw (2) is L1, and the lathe bed (10) is adjusted to an initial state from a concave state by adjusting the sizing block (6) below the lathe bed (10).
2. The method for pre-stretching the screw of the large gantry machining center according to claim 1, wherein the bed (10) is made of ferrous metal.
3. The stretching method for pre-stretching the screw of the large gantry machining center according to claim 2, wherein the length of the bed (10) is more than 8000 mm.
4. The method for pre-stretching the screw rod of the large gantry machining center according to claim 3, wherein the ratio of the length of the bed (10), the width of the bed (10) and the height of the bed (10) is 800: (150-.
5. The method for pre-stretching the screw of the large gantry machining center according to claim 4, wherein the width of the guide rail (7) is 50-60mm, and the length of the guide rail is consistent with the length of the bed (10).
6. Stretching method for pre-stretching a large gantry machining center screw according to claim 1, characterized in that the bed (10) is adjusted from a concave state to an initial state, the center screw (2) is elastically deformed by the bed (10), and the length of the center screw (2) is adjusted from L 1 Is stretched to L 2 Increasing the value to obtain the required stretching amount E, and calculating the height difference value H according to a calculation formula
And (5) determining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111247200.3A CN114102165B (en) | 2021-10-26 | 2021-10-26 | Stretching method for pre-stretching lead screw of large gantry machining center |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111247200.3A CN114102165B (en) | 2021-10-26 | 2021-10-26 | Stretching method for pre-stretching lead screw of large gantry machining center |
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| CN114102165A CN114102165A (en) | 2022-03-01 |
| CN114102165B true CN114102165B (en) | 2022-09-13 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002481A (en) * | 2016-05-10 | 2016-10-12 | 天津大学 | Testing system and method for evaluating lead screw prestretching force and dynamic performance of feeding system |
| CN210360308U (en) * | 2019-07-23 | 2020-04-21 | 嘉兴市浩丰机械设备制造有限公司 | Machine tool supporting plate with pre-stretched lead screw |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6046919B2 (en) * | 2012-05-28 | 2016-12-21 | 日本トムソン株式会社 | Slide device |
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- 2021-10-26 CN CN202111247200.3A patent/CN114102165B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002481A (en) * | 2016-05-10 | 2016-10-12 | 天津大学 | Testing system and method for evaluating lead screw prestretching force and dynamic performance of feeding system |
| CN210360308U (en) * | 2019-07-23 | 2020-04-21 | 嘉兴市浩丰机械设备制造有限公司 | Machine tool supporting plate with pre-stretched lead screw |
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| CN114102165A (en) | 2022-03-01 |
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Address after: 272000 East of Jizhou Road, north of North Ring Road, Economic Development Zone, Xinyan Town, Yanzhou District, Jining City, Shandong Province (in Central Europe Industrial Park) Patentee after: Shandong Shuodebo CNC Machinery Co.,Ltd. Address before: 272106 room 6-15, innovation building, economic development zone, Xinyan Town, Yanzhou District, Jining City, Shandong Province Patentee before: Shandong Chenxing CNC Machinery Co.,Ltd. |
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