CN219520997U - Workpiece pressing device - Google Patents
Workpiece pressing device Download PDFInfo
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- CN219520997U CN219520997U CN202320146824.4U CN202320146824U CN219520997U CN 219520997 U CN219520997 U CN 219520997U CN 202320146824 U CN202320146824 U CN 202320146824U CN 219520997 U CN219520997 U CN 219520997U
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- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model relates to the field of mechanical equipment, in particular to a workpiece pressing device. The workpiece pressing device comprises a linear driving source, a force sensor and a pressing plate, wherein the linear driving source is provided with an output rod capable of reciprocating along the vertical direction, the upper end of the force sensor is connected with the lower end of the output rod, the lower end of the force sensor is connected with the pressing plate, and the force sensor can detect pressure data in the following three states: (1) the output rod of the linear driving source rises at a constant speed, and tension data measured by the force sensor are Sup; (2) the output rod of the linear driving source is in a static and non-compression state, and the tension data measured by the force sensor is S0; (3) the output rod of the linear driving source moves downwards, the workpiece is pressed by the pressing plate, and the pressure data measured by the force sensor is Sdown. The utility model can reduce the influence of dead weight of parts such as the pressing plate and the like on the calculation precision of the pressing force of the pressing device.
Description
Technical Field
The utility model relates to the field of mechanical equipment, in particular to a workpiece pressing device.
Background
In the process of processing a workpiece such as welding, a set of pressing devices is generally designed to fix the workpiece, and the workpiece is generally pressed by a cylinder or an electric cylinder, etc., and in order to improve the accuracy of welding, it is generally necessary to know the actual pressing force of the cylinder or the electric cylinder on the workpiece.
The existing compressing device is used for compressing a workpiece, besides the compressing force of an air cylinder or an electric cylinder on the workpiece, the compressing device also comprises the pressure generated by the self weight of parts such as an upper clamp, an air cylinder rod or an electric cylinder rod, a guide pillar and the like in the compressing device, and meanwhile, friction force generated when the guide pillar moves along a bearing is also included, the forces jointly act on the workpiece, compressing force data, which are needed to be obtained by an operator, of the compressing device applied to the workpiece by the compressing device are the compressing force of the air cylinder or the electric cylinder on the workpiece, and the dead weight influence of a pressing plate, the clamp and the like is eliminated by subtracting a fixed weight in the related technology, but in actual use, the clamp can be replaced, the weight is changed, and the final calculation result is inaccurate by subtracting the fixed weight.
Disclosure of Invention
The utility model provides a method for calculating the pressing force applied by a workpiece pressing device and the workpiece pressing device in order to reduce the influence of dead weight of parts such as a pressing plate and the like on the pressing force calculation precision of the pressing device.
The utility model provides a workpiece pressing device, which adopts the following technical scheme:
the utility model provides a work piece closing device, includes sharp actuating source, force sensor and clamp plate, sharp actuating source has the output pole that can follow vertical direction reciprocating motion, force sensor's upper end is connected with the lower extreme of output pole, force sensor's lower extreme with the clamp plate is connected, force sensor can detect the pressure data under the following three kinds of states:
1. the output rod of the linear driving source rises at a constant speed, and tension data measured by the force sensor are Sup;
2. the output rod of the linear driving source is in a static and non-compaction state, and the tension data measured by the force sensor is S0;
3. the output rod of the linear driving source moves downwards, the workpiece is pressed by the pressing plate, and the pressure data measured by the force sensor is SDown.
By adopting the technical scheme, the tension data Sup measured by the force sensor comprises the self gravity G of the parts such as the pressing plate and the friction force f received when the parts move, usually Sup=G+f, the tension data S0 measured by the force sensor comprises the self gravity G of the parts such as the pressing plate and the like, usually S0=G, the pressure data Sdown measured by the force sensor synthesizes the self gravity G of the parts such as the pressing plate and the friction force f received, the three values are detected by the force sensor, and whether the weight of the parts such as the pressing plate and the clamp of a user changes or not can be measured through the force sensor immediately, so that the influence of the dead weight of the parts such as the pressing plate on the calculation precision of the pressing force of the pressing device is reduced, and the accuracy in the follow-up calculation of the pressing force is improved. The pressing force can be calculated in such a way that if n=k (sdown+s0-Sup), N is the number of linear driving sources acting on the pressing plate, K is a calibration value of the ratio of the actual pressure value to the pressure signal data, interference of friction force on the pressing force when the pressing device presses the workpiece is eliminated, and meanwhile, even if different important upper clamps are additionally arranged below the subsequent pressing plate, or the weight of other places is changed, the weight changing factors of the parts can be eliminated by the calculation method, so that the accurate pressing force is obtained.
Preferably, the number of the linear driving sources and the number of the force sensors are 1, and the force sensors are stretching and compression bidirectional force sensors.
By adopting the technical scheme, the tensile compression bidirectional force sensor can measure tensile force and pressure simultaneously, and Sup, S0 and Sdown are all detected by the same force sensor, so that the structure is simple.
Preferably, the number of the linear driving sources and the number of the force sensors are 2, the 2 linear driving sources are respectively defined as a first linear driving source and a second linear driving source, the 2 force sensors are respectively defined as a first force sensor and a second force sensor, the first force sensor is connected with an output rod of the first linear driving source and used for measuring tension data Sup and tension data S0, and the second force sensor is connected with an output rod of the second linear driving source and used for measuring pressure data SDown.
Through adopting above-mentioned technical scheme, the design has two sharp driving sources, and the pressure of appling is more stable, and the clamp plate has more a atress department, and the atress is more even for the clamp plate is more stable to the pressure of work piece.
Preferably, the first force sensor is a tension force sensor, and the second force sensor is a compression force sensor.
By adopting the technical scheme, the first force sensor is designed as the tension force sensor, when the output rod of the first linear driving source rises at a constant speed and keeps static, the tension force can be applied to the tension force sensor, the first force sensor can measure the tension force applied at the moment, so that the pressure data of Sup and S0 are obtained, and the second force sensor is a compression force sensor, so that the compression force sensor does not measure at the moment; the output rod of the second linear driving source moves downwards to press the workpiece through the pressing plate, the second force sensor is a compression force sensor, the pressure data Sdown at the moment can be measured, and the first force sensor does not measure.
Preferably, the output rod of the first linear driving source comprises a first rod body and a first connecting piece, the upper end of the first connecting piece is connected with the lower end of the first rod body, the lower end of the first connecting piece is connected with the first force sensor, a first groove is formed in the side wall of the first connecting piece, the workpiece pressing device further comprises a first supporting piece, the upper end of the first supporting piece is connected with or abutted against the upper side wall of the first groove, and the upper end of the first supporting piece is distributed with the lower side wall of the first groove at intervals; the output rod of the second linear driving source comprises a second rod body and a second connecting piece, the upper end of the second connecting piece is connected with the lower end of the second rod body, the lower end of the second connecting piece is connected with the second force sensor, a second groove is formed in the side wall of the second connecting piece, the workpiece pressing device further comprises a second supporting piece, the upper end of the second supporting piece is distributed at intervals on the upper side wall of the second groove, and the upper end of the second supporting piece is connected with or in butt joint with the lower side wall of the second groove.
By adopting the technical scheme, when the output rod of the first driving source ascends or is stationary, the upper end of the first supporting piece is distributed with the lower side wall of the first groove at intervals, so that the detection of the tensile force data Sup and S0 by the first force sensor is not interfered, when the output rod of the first driving source moves downwards to press the workpiece, the upper end of the first supporting piece is connected with or is abutted against the upper side wall of the first groove, so that the first force sensor cannot detect the pressure data Sdown, when the output rod of the second driving source ascends or is stationary, the upper end of the second supporting piece is connected with or is abutted against the lower side wall of the second groove, so that the detection of the tensile force data Sup and S0 by the second force sensor cannot be interfered, and when the output rod of the second driving source moves downwards to press the workpiece, the upper end of the second supporting piece is distributed with the upper side wall of the second groove at intervals, so that the detection of the pressure data Sdown by the second force sensor cannot be interfered.
Preferably, the upper end of the first supporting piece is bent towards the direction of the first groove to form a first upper folded edge, the upper surface of the first upper folded edge is connected with or abutted against the upper side wall of the first groove, the lower surface of the first upper folded edge is distributed at intervals with the lower side wall of the first groove, the upper end of the second supporting piece is bent towards the direction of the second groove to form a second upper folded edge, the upper surface of the second upper folded edge is distributed at intervals with the upper side wall of the second groove, and the lower surface of the second upper folded edge is connected with or abutted against the lower side wall of the second groove.
Through adopting above-mentioned technical scheme, first support piece passes through the first hem and cooperates with first recess on, and second support piece passes through the second and goes up hem and cooperate with the second recess to the atress condition when controlling first force sensor and second force sensor at the rising and decline state.
Preferably, the workpiece pressing device further comprises a frame, a guide pillar is arranged on the frame in a sliding manner along the vertical direction, the lower end of the guide pillar is connected with the pressing plate, an upper clamp is arranged on the lower plate surface of the pressing plate, a lower clamp is arranged below the pressing plate, and the workpiece is arranged on the upper clamp and/or the lower clamp.
By adopting the technical scheme, after the guide post is designed, the stability of the pressing plate during lifting can be improved.
Drawings
Fig. 1 is a schematic view of an embodiment of the present utility model in an uncompacted state.
Fig. 2 is a schematic structural diagram of the present utility model in a compressed state.
Fig. 3 is a schematic structural diagram of the second embodiment of the present utility model in an uncompacted state.
Fig. 4 is a schematic structural diagram of the second embodiment of the present utility model in a compressed state.
Reference numerals illustrate: 1. a linear driving source; 11. a first linear driving source; 111. a first rod body; 112. a first connector; 1121. a first groove; 12. a second linear driving source; 121. a second rod body; 122. a second connector; 1221. a second groove; 2. a force sensor; 21. a first force sensor; 22. a second force sensor; 3. a pressing plate; 4. a first support; 41. a first upper hem; 5. a second support; 51. a second upper hem; 6. a frame; 7. a guide post; 8. a clamp is arranged; 9. and (5) lower clamp.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-4.
Embodiment one:
as shown in fig. 1 and 2, the present embodiment provides a workpiece pressing device including a linear driving source 1, a force sensor 2, and a pressing plate 3, the linear driving source 1 having an output rod capable of reciprocating in a vertical direction.
In this embodiment, the workpiece pressing device further includes a frame 6, the linear driving source 1 includes a cylinder fixed on the frame 6, a piston is slidably disposed on the cylinder, and the output rod may be a piston rod connected with the piston, or may be a piston connected with the piston rod, and the output rod is connected with the piston rod. Alternatively, the linear driving source 1 may be an electric cylinder, and the linear driving source 1 is fixed to the frame 6,
alternatively, the device can be fixed on a workbench or other places by a fixing seat and the like.
As shown in fig. 1 and 2, the upper end of the force sensor 2 is connected to the lower end of the output rod, and the lower end of the force sensor 2 is connected to the platen 3.
In this embodiment, the lower end of the output rod is connected to the force sensor 2 through a connecting piece, and as another scheme, the lower end of the output rod may also be directly connected to the force sensor 2, that is, the direct connection and the indirect connection are both of the output rod and the force sensor 2.
As shown in fig. 1 and 2, in order to improve stability when the platen 3 is lifted, the frame 6 is provided with two guide posts 7 in a sliding manner along a vertical direction, and the two guide posts 7 in this embodiment are respectively located at two sides of the linear driving source 1 and symmetrically distributed about the linear driving source 1. Alternatively, the number of guide posts 7 may be multiple. The lower end of the guide post 7 is connected with the pressing plate 3, and the guide post 7 is matched with the pressing plate 3 in a specific sliding fit manner by arranging a bearing, a shaft sleeve and the like on the frame 6 so as to realize the sliding of the guide post 7.
As shown in fig. 1 and 2, the lower plate surface of the platen 3 has an upper jig 8, the lower jig 9 is provided below the platen 3, and the workpiece is provided on the upper jig 8 and/or the lower jig 9, and in this embodiment, the workpiece is preferably provided on the lower jig 9.
As shown in fig. 1 and 2, the force sensor 2 can detect pressure data in three states:
(1) the output rod of the linear driving source 1 rises at a constant speed, and the tension data measured by the force sensor 2 is Sup;
(2) the output rod of the linear driving source 1 is in a static state and in a non-compression state, and the tension data measured by the force sensor 2 is S0;
(3) the output rod of the linear driving source 1 moves downwards, the workpiece is pressed by the pressing plate 3, and the pressure data measured by the force sensor 2 is Sdown.
In this embodiment, the number of the linear driving sources 1 and the number of the force sensors 2 are 1, and the force sensors 2 are tensile compression bidirectional force sensors. The tensile and compressive bi-directional force sensor can measure tensile force and compressive force simultaneously, and Sup, S0 and Sdown are all detected by the same force sensor 2.
The working principle of this embodiment is as follows:
when the output rod of the linear driving source 1 rises at a constant speed, the tension data Sup measured by the force sensor 2 includes the self-gravity G of the part such as the pressing plate 3, and the friction force f received when the part moves, typically, sup=g+f, when the output rod of the linear driving source 1 is in a static and non-pressing state, the tension data S0 measured by the force sensor 2 includes the self-gravity G of the part such as the pressing plate 3, typically s0=g, and when the output rod of the linear driving source 1 presses the workpiece through the pressing plate 3, the pressure data Sdown measured by the force sensor 2 integrates the self-gravity G of the part such as the pressing plate 3 and the friction force f received, and calculates the pressing force n=k (sdown+s0-Sup) applied by the workpiece pressing device.
It should be noted that the workpiece pressing device can be applied to other methods besides the method for calculating the pressing force described in the present embodiment, and only Sup, S0 and Sdown can be used for calculation.
Embodiment two:
as shown in fig. 3 and 4, the present embodiment is substantially the same as the first embodiment except that in the present embodiment, the number n=2 of the linear driving sources 1 acting on the platen 3, 2 linear driving sources 1 are defined as a first linear driving source 11 and a second linear driving source 12, respectively, the number of force sensors 2 is 2, and are defined as a first force sensor 21 and a second force sensor 22, respectively, the first force sensor 21 is connected to the output rod of the first linear driving source 11 for measuring the tension data Sup and the tension data S0, and the second force sensor 22 is connected to the output rod of the second linear driving source 12 for measuring the pressure data Sdown.
Preferably, the output rod of the first linear driving source 11 includes a first rod body 111 and a first connecting member 112, wherein an upper end of the first connecting member 112 is connected with a lower end of the first rod body 111, a lower end of the first connecting member 112 is connected with the first force sensor 21, a first groove 1121 is formed in a side wall of the first connecting member 112, the workpiece pressing device further includes a first supporting member 4, an upper end of the first supporting member 4 is connected with or abutted against an upper side wall of the first groove 1121, and an upper end of the first supporting member 4 is spaced apart from a lower side wall of the first groove 1121.
Specifically, the first support 4 is in a zigzag shape, the upper end of the first support 4 is bent in the direction of the first groove 1121 to form a first upper flange 41, and the lower end of the first support 4 is bent in the direction away from the first force sensor 21 to form a first lower flange, and the first lower flange is fixed on the platen 3.
The upper surface of the first upper hem 41 is connected or abutted with the upper side wall of the first groove 1121, and the lower surface of the first upper hem 41 is spaced apart from the lower side wall of the first groove 1121.
In this embodiment, the first connecting member 112 is cylindrical, the first groove 1121 is an annular groove, and is coaxially disposed with the first connecting member 112, the upper sidewall of the first groove 1121 is an annular groove wall located above, the lower sidewall of the first groove 1121 is an annular groove wall located below, and the first upper flange 41 is provided with an opening in clearance fit with the bottom of the first groove 1121.
The output rod of the second linear driving source 12 includes a second rod body 121 and a second connecting piece 122, the upper end of the second connecting piece 122 is connected with the lower end of the second rod body 121, the lower end of the second connecting piece 122 is connected with the second force sensor 22, a second groove 1221 is provided on the side wall of the second connecting piece 122, the workpiece pressing device further includes a second supporting piece 5, the upper end of the second supporting piece 5 is distributed with the upper side wall of the second groove 1221 at intervals, and the upper end of the second supporting piece 5 is connected with or abutted against the lower side wall of the second groove 1221.
Specifically, the second supporting member 5 and the first supporting member 4 are in a zigzag shape, the upper end of the second supporting member 5 is bent towards the direction of the second groove 1221 to form a second upper edge fold 51, and the lower end of the second supporting member 5 is bent towards the direction away from the second force sensor 22 to form a second lower edge fold, which is fixed to the pressing plate 3.
The upper surface of the second upper flange 51 is spaced apart from the upper sidewall of the second recess 1221, and the lower surface of the second upper flange 51 is connected to or abutted against the lower sidewall of the second recess 1221.
In this embodiment, the second connecting member 122 is cylindrical, the second groove 1221 is an annular groove, and is coaxially disposed with the second connecting member 122, the upper sidewall of the second groove 1221 is an annular groove wall located above, the lower sidewall of the second groove 1221 is an annular groove wall located below, and the second upper flange 51 is provided with an opening in clearance fit with the groove bottom of the second groove 1221.
Alternatively, the first support 4 and the second support 5 may not be designed, the first force sensor 21 may be a tension force sensor, and only the Sup and S0 may be measured, the second force sensor 22 may be a compression force sensor, and only the Sdown may be measured.
The working principle of this embodiment is as follows:
when the output rod of the first driving source is raised or stationary, the first force sensor 21 detects the tension data Sup, S0, the second force sensor 22 does not detect the tension data Sup, S0, and when the output rod of the first driving source is moved down to press the workpiece, the first force sensor 21 does not detect the pressure data Sdown, the second force sensor 22 detects the pressure data Sdown, and the pressing force n=2k (sdown+s0-Sup) applied by the workpiece pressing device is calculated.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The utility model provides a work piece closing device, its characterized in that includes sharp drive source (1), force sensor (2) and clamp plate (3), sharp drive source (1) have can follow vertical direction reciprocating motion's output pole, the upper end of force sensor (2) is connected with the lower extreme of output pole, the lower extreme of force sensor (2) with clamp plate (3) are connected, force sensor (2) can detect the pressure data under the following three kinds of states:
(1) the output rod of the linear driving source (1) rises at a constant speed, and tension data measured by the force sensor (2) are Sup;
(2) the output rod of the linear driving source (1) is in a static and non-pressing state, and the tension data measured by the force sensor (2) is S0;
(3) the output rod of the linear driving source (1) moves downwards, the workpiece is pressed by the pressing plate (3), and the pressure data measured by the force sensor (2) is Sdown.
2. The workpiece pressing device according to claim 1, wherein the number of the linear driving source (1) and the number of the force sensors (2) are 1, and the force sensors (2) are stretching and compression bidirectional force sensors.
3. Workpiece pressing device according to claim 1, characterized in that the number of linear drive sources (1) and the number of force sensors (2) are 2,2 linear drive sources (1) are defined as a first linear drive source (11) and a second linear drive source (12), respectively, 2 force sensors (2) are defined as a first force sensor (21) and a second force sensor (22), respectively, the first force sensor (21) is connected with an output rod of the first linear drive source (11) for measuring tension data Sup and tension data S0, and the second force sensor (22) is connected with an output rod of the second linear drive source (12) for measuring pressure data Sdown.
4. A workpiece pressing device according to claim 3, characterized in that the first force sensor (21) is a tension force sensor and the second force sensor (22) is a compression force sensor.
5. The workpiece pressing device according to claim 4, wherein the output rod of the first linear driving source (11) comprises a first rod body (111) and a first connecting piece (112), the upper end of the first connecting piece (112) is connected with the lower end of the first rod body (111), the lower end of the first connecting piece (112) is connected with the first force sensor (21), a first groove (1121) is formed in the side wall of the first connecting piece (112), the workpiece pressing device further comprises a first supporting piece (4), the upper end of the first supporting piece (4) is connected with or abutted against the upper side wall of the first groove (1121), and the upper end of the first supporting piece (4) is distributed at intervals with the lower side wall of the first groove (1121).
6. The workpiece pressing device according to claim 5, wherein the output rod of the second linear driving source (12) comprises a second rod body (121) and a second connecting piece (122), the upper end of the second connecting piece (122) is connected with the lower end of the second rod body (121), the lower end of the second connecting piece (122) is connected with the second force sensor (22), a second groove (1221) is formed in the side wall of the second connecting piece (122), the workpiece pressing device further comprises a second supporting piece (5), the upper end of the second supporting piece (5) is distributed at intervals with the upper side wall of the second groove (1221), and the upper end of the second supporting piece (5) is connected with or abutted against the lower side wall of the second groove (1221).
7. The workpiece pressing device according to claim 6, wherein an upper end of the first supporting member (4) is bent towards the direction of the first groove (1121) to form a first upper folded edge (41), an upper surface of the first upper folded edge (41) is connected or abutted to an upper side wall of the first groove (1121), a lower surface of the first upper folded edge (41) is spaced apart from a lower side wall of the first groove (1121), an upper end of the second supporting member (5) is bent towards the direction of the second groove (1221) to form a second upper folded edge (51), an upper surface of the second upper folded edge (51) is spaced apart from an upper side wall of the second groove (1221), and a lower surface of the second upper folded edge (51) is connected or abutted to a lower side wall of the second groove (1221).
8. A workpiece pressing device according to any one of claims 1-7, characterized in that the workpiece pressing device further comprises a frame (6), the frame (6) is provided with a guide post (7) in a sliding manner in the vertical direction, the lower end of the guide post (7) is connected with the pressing plate (3), the lower plate surface of the pressing plate (3) is provided with an upper clamp (8), the lower part of the pressing plate (3) is provided with a lower clamp (9), and the workpiece is arranged on the upper clamp (8) and/or the lower clamp (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320146824.4U CN219520997U (en) | 2023-01-16 | 2023-01-16 | Workpiece pressing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320146824.4U CN219520997U (en) | 2023-01-16 | 2023-01-16 | Workpiece pressing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252088A (en) * | 2023-01-16 | 2023-06-13 | 必能信超声(上海)有限公司 | Calculation method of pressing force exerted by workpiece pressing device and workpiece pressing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252088A (en) * | 2023-01-16 | 2023-06-13 | 必能信超声(上海)有限公司 | Calculation method of pressing force exerted by workpiece pressing device and workpiece pressing device |
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