CN215726662U - Numerical control machine tool cross beam bolt connection rigidity testing device - Google Patents
Numerical control machine tool cross beam bolt connection rigidity testing device Download PDFInfo
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- CN215726662U CN215726662U CN202121554553.3U CN202121554553U CN215726662U CN 215726662 U CN215726662 U CN 215726662U CN 202121554553 U CN202121554553 U CN 202121554553U CN 215726662 U CN215726662 U CN 215726662U
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 239000011888 foil Substances 0.000 claims description 2
- 230000005012 migration Effects 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of bolt rigidity testing, and discloses a device for testing the connection rigidity of a cross beam bolt of a numerical control machine tool, which comprises a base, a bolt, a nut and a pushing assembly, wherein a fixed plate is fixed at the top of the base, a movable plate is arranged on one side of the fixed plate, a strain gauge is adhered to one side wall of the fixed plate, which is close to the movable plate, the bolt sequentially penetrates through the fixed plate and the movable plate, and the nut is screwed to the end part of the bolt and abuts against the movable plate. The accuracy of tensile rigidity measurement is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of bolt rigidity testing, and particularly relates to a device for testing the bolt connection rigidity of a cross beam of a numerical control machine tool.
Background
Stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to a force, and is indicative of the ease with which the material or structure deforms elastically. The cross beam of the numerical control machine tool is connected by bolts, and the bolts need to be connected by the rigidity testing device to test the connection rigidity of the bolts in the same batch before use, so that the situation that the pretightening force is reduced in the use process is prevented, and the connection strength of the bolts is ensured.
When the movable plate is pushed, the situation that the bolt is easily bent is caused, shear stress is generated, the axial tensile rigidity is not accurately measured, the fixed plate cannot be replaced by welding on the base, the diameter of a threaded through hole is fixed, the rigidity of the bolt with one size can be only tested, and the universality is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for testing the bolt connection rigidity of a cross beam of a numerical control machine tool, which aims to solve the problems that the existing bolt is easy to bend when testing the tensile rigidity, the accuracy of a measurement result is influenced, the testing device can only test the rigidity of a bolt with one size, and the universality is poor.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a digit control machine tool crossbeam bolted connection rigidity testing arrangement, includes base, bolt, nut and promotion subassembly, the top of base is fixed with decides the board, decides board one side and is provided with the movable plate, and decides to paste on the board is close to a lateral wall of movable plate and have the foil gage, the bolt runs through in proper order decides board and movable plate, and the nut revolves soon to the bolt tip to near the movable plate, the movable plate is close to and is located bolt perforation both sides symmetry on a lateral wall of deciding the board and install two pressure sensor, the promotion subassembly includes two horizontal migration's promotion post, and the tip of every promotion post all can cooperate with a pressure sensor is perpendicular.
Preferably, the top surface of base has inwards seted up the constant head tank, and the base is inside to close soon through the screw thread and install the threaded rod, the bottom of deciding the board can cooperate with the constant head tank, and the threaded rod can with the bottom screw-thread fit who decides the board to run through and decide the board.
Preferably, a positioning block is fixed on one side wall of the fixed plate, a limiting groove is formed in one side wall of the movable plate, and the limiting groove can be matched with the positioning block.
Preferably, the pushing columns further comprise a connecting plate and a sliding block, the sliding block is fixed at the center of the top of the connecting plate, and one ends of the two pushing columns are connected to one side wall of the connecting plate and symmetrically distributed on two sides of the vertical axis of the connecting plate.
Preferably, the top of base is fixed with two blocks of curb plates, and installs the lead screw through the bearing between two blocks of curb plates to be fixed with the gag lever post, the slider closes soon through the screw thread and installs in the lead screw outside, and the gag lever post outside is located to the slip cap.
Preferably, a motor is fixed on one side wall of one of the side plates through a support, and a driving shaft of the motor is fixedly connected with one end of the screw rod.
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the utility model, the horizontally movable pushing assembly is arranged, the sliding block is fixed at the center of the bottom of the connecting plate, the movement is controlled by the screw rod and the limiting rod, the two pressure sensors are symmetrically arranged on two sides of the bolt through hole on the movable plate, the two pushing columns horizontally symmetrically arranged on the connecting plate are horizontally aligned with the two pressure sensors respectively, and after the movable plate and the fixed plate are connected with the nut through the bolt, the pushing assembly pushes the movable plate to horizontally move.
(2) The testing device is provided with the fixed plate and the movable plate with various perforation sizes, the bottom ends of all the fixed plates can be matched with the positioning groove, after all the fixed plates are installed, the perforated axes of the fixed plates can be overlapped, the perforated axes of the movable plates are also overlapped, the accurate measurement of the rigidity of the bolt is ensured, and the device is suitable for the bolt measurement of various sizes and has high universality.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the engagement of the pushing column with the movable plate according to the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 1;
FIG. 4 is a schematic view of a pushing assembly according to the present invention;
in the figure: 1. a base; 2. a motor; 3. a side plate; 4. a pushing assembly; 5. a bolt; 6. a movable plate; 7. fixing a plate; 8. a threaded rod; 9. positioning a groove; 10. a screw rod; 11. a limiting rod; 12. a pressure sensor; 13. pushing the column; 14. a nut; 15. a strain gauge; 16. a connecting plate; 17. a slider; 18. and (5) positioning the blocks.
Detailed Description
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: a device for testing connection rigidity of a cross beam bolt of a numerical control machine tool comprises a base 1, a bolt 5, a nut 14 and a pushing assembly 4, wherein a fixed plate 7 is fixed at the top of the base 1, a movable plate 6 is arranged on one side of the fixed plate 7, a strain gauge 15 is adhered to one side wall, close to the movable plate 6, of the fixed plate 7, the bolt 5 sequentially penetrates through the fixed plate 7 and the movable plate 6, the nut 14 is screwed to the end portion of the bolt 5 and abuts against the movable plate 6, the movable plate 6 is in contact with the fixed plate 7 through the strain gauge 15, the strain gauge 15 is used for measuring acting force applied to the fixed plate 7 by the movable plate 6, namely pre-tightening force generated by the bolt 5 after the nut 14 is screwed, two pressure sensors 12 are symmetrically arranged on two sides of a through hole of the bolt 5 on one side wall, close to the fixed plate 7, of the movable plate 6, two pushing columns 13 which move horizontally are arranged, and the end portion of each pushing column 13 can be vertically matched with one pressure sensor 12, the pressure sensor 12 is used for testing the thrust borne by the movable plate 6, and the two stress points on the movable plate 6 are symmetrically distributed, so that the movable plate 6 is pushed by the two pushing columns 13 along the horizontal direction, the bending phenomenon of the bolt 5 is avoided, the shear stress is prevented from being generated, and the accurate measurement of the tensile rigidity of the bolt 5 is ensured.
Further, the constant head tank 9 has inwards been seted up to base 1's top surface, and base 1 is inside to close soon through the screw thread and installs threaded rod 8, the bottom of deciding board 7 can cooperate with constant head tank 9, and threaded rod 8 can cooperate with the bottom spiral of deciding board 7, and run through and decide board 7, the dismantlement of deciding board 7 of being convenient for, this measuring device is equipped with multiple perforation size decides board 7 and movable plate 6, can measure not unidimensional bolt 5 tensile rigidity, improve testing arrangement's commonality, every bottom of deciding board 7 all can cooperate with constant head tank 9, every piece is decided board 7 and is installed the back, its perforation axis all overlaps, and the perforation axis of movable plate 6 all overlaps with the perforation axis of deciding board 7, two pressure sensor 12 on every movable plate 6 align with two promotion post 13 one end levels respectively.
Furthermore, a positioning block 18 is fixed on one side wall of the fixed plate 7, a limiting groove is formed in one side wall of the movable plate 6, the limiting groove can be matched with the positioning block 18, and after the movable plate 6 and the fixed plate 7 are installed, the end face of the positioning block 18 is not in contact with the deepest part of the limiting groove, so that the measured value of the strain gauge 15 is guaranteed to be the pretightening force of the bolt 5.
Specifically, the pushing columns 13 further comprise a connecting plate 16 and sliders 17, the sliders 17 are fixed at the center of the top of the connecting plate 16, and one ends of the two pushing columns 13 are connected to one side wall of the connecting plate 16 and symmetrically distributed on two sides of the vertical axis of the connecting plate.
It is worth to say that two side plates 3 are fixed on the top of the base 1, a screw rod 10 is installed between the two side plates 3 through a bearing, a limiting rod 11 is fixed, a sliding block 17 is installed outside the screw rod 10 in a screwing mode through threads and is sleeved outside the limiting rod 11 in a sliding mode, the limiting rod 11 limits the sliding block 17 to rotate, the sliding block is made to horizontally slide, and therefore the connecting plate 16 drives the pushing column 13 to synchronously move.
Furthermore, a motor 2 is fixed on one side wall of one of the side plates 3 through a support, and a driving shaft of the motor 2 is fixedly connected with one end of the screw rod 10.
The working principle and the using process of the utility model are as follows: when the device is used, a worker firstly installs the fixed plate 7 matched with the size of the bolt 5 to be detected on the base 1, the bottom end of the fixed plate is matched with the positioning groove 9, then the threaded rod 8 is screwed to penetrate through the fixed plate 7 to limit the fixed plate, the movable plate 6 is placed on one side of the fixed plate 7, the positioning block 18 is matched with the limiting groove, then the bolt 5 penetrates through the fixed plate 7 and the movable plate 6 in sequence, the nut 14 is screwed on the bolt 5, and the pressure measured by the strain gauge 15 is the pretightening force;
the motor 2 is started to drive the screw rod 10 to rotate, the sliding block 17 is enabled to horizontally move towards the direction of the fixed plate 7 under the action of the limiting rod 11, the two pushing columns 13 are driven to synchronously and horizontally move through the connecting plate 16, the two pushing columns 13 respectively apply pushing force to the two pressure sensors 12, the movable plate 6 is horizontally pushed towards the direction of the nut 14 until the pressure value measured by the strain gauge 15 begins to change, which represents that the pretightening force changes, the bolt 5 deforms, the pressure values sensed by the two pressure sensors 12 are recorded at the moment, and the sum of all the measured pressure values is the axial tensile rigidity of the bolt 5.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a digit control machine tool crossbeam bolted connection rigidity testing arrangement which characterized in that: including base (1), bolt (5), nut (14) and promotion subassembly (4), the top of base (1) is fixed with decides board (7), decides board (7) one side and is provided with movable plate (6), and pastes on the fixed plate (7) is close to a lateral wall of movable plate (6) and have foil gage (15), bolt (5) run through in proper order decides board (7) and movable plate (6), and nut (14) revolve and twist to bolt (5) tip to near movable plate (6), it installs two pressure sensor (12) to lie in bolt (5) perforation bilateral symmetry on a lateral wall that movable plate (6) are close to fixed plate (7), promote subassembly (4) including two horizontal migration's promotion post (13), and the tip that every promotes post (13) all can cooperate with a pressure sensor (12) perpendicularly.
2. The numerical control machine tool beam bolt connection rigidity testing device according to claim 1, characterized in that: constant head tank (9) have inwards been seted up to the top surface of base (1), and base (1) is inside to close soon through the screw thread and installs threaded rod (8), the bottom of deciding board (7) can cooperate with constant head tank (9), and threaded rod (8) can cooperate with the bottom spiral of deciding board (7) to run through and decide board (7).
3. The numerical control machine tool beam bolt connection rigidity testing device according to claim 2, characterized in that: a positioning block (18) is fixed on one side wall of the fixed plate (7), a limiting groove is formed in one side wall of the movable plate (6), and the limiting groove can be matched with the positioning block (18).
4. The numerical control machine tool beam bolt connection rigidity testing device according to claim 3, characterized in that: promote post (13) and still include connecting plate (16) and slider (17), and slider (17) are fixed in the top center department of connecting plate (16), two promote the one end of post (13) all be connected to on the lateral wall of connecting plate (16) to symmetric distribution is in its vertical axis both sides.
5. The numerical control machine tool beam bolt connection rigidity testing device according to claim 4, characterized in that: the top of base (1) is fixed with two blocks of curb plates (3), and installs lead screw (10) through the bearing between two blocks of curb plates (3) to be fixed with gag lever post (11), slider (17) close soon through the screw and install in lead screw (10) outside, and sliding sleeve locates the gag lever post (11) outside.
6. The numerical control machine tool beam bolt connection rigidity testing device according to claim 5, characterized in that: one side wall of one side plate (3) is fixed with a motor (2) through a support, and a driving shaft of the motor (2) is fixedly connected with one end of a screw rod (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121554553.3U CN215726662U (en) | 2021-07-09 | 2021-07-09 | Numerical control machine tool cross beam bolt connection rigidity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121554553.3U CN215726662U (en) | 2021-07-09 | 2021-07-09 | Numerical control machine tool cross beam bolt connection rigidity testing device |
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| Publication Number | Publication Date |
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| CN215726662U true CN215726662U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121554553.3U Expired - Fee Related CN215726662U (en) | 2021-07-09 | 2021-07-09 | Numerical control machine tool cross beam bolt connection rigidity testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964595A (en) * | 2022-05-07 | 2022-08-30 | 东风汽车集团股份有限公司 | Method and device for measuring axial force of bolt |
-
2021
- 2021-07-09 CN CN202121554553.3U patent/CN215726662U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964595A (en) * | 2022-05-07 | 2022-08-30 | 东风汽车集团股份有限公司 | Method and device for measuring axial force of bolt |
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