CN203156456U - Feedback device for detecting descending position of workpiece prepositioning tray - Google Patents
Feedback device for detecting descending position of workpiece prepositioning tray Download PDFInfo
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- CN203156456U CN203156456U CN 201320056361 CN201320056361U CN203156456U CN 203156456 U CN203156456 U CN 203156456U CN 201320056361 CN201320056361 CN 201320056361 CN 201320056361 U CN201320056361 U CN 201320056361U CN 203156456 U CN203156456 U CN 203156456U
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- 238000000034 method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 8
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- 238000007789 sealing Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a feedback device for detecting a descending position of a workpiece prepositioning tray. The feedback device comprises a body, a motion rod, a cylindrical pin, a spring plunger and an air-sensitive element. The motion rod moves up and down to conduct communication and closure on an internal air passage, then the air-sensitive element detects the air passage and feeds back to a numerical control system, an oil cylinder is clamped, and then a workpiece is clamped. According to the feedback device, closed-loop feedback of the position of the prepositioning tray is achieved, accidental damage to a clamp is avoided, and potential safety hazards are eliminated.
Description
Technical Field
The utility model relates to a detect feedback device of work piece prepositioning tray decline position.
Background
The engine production line clamp is generally a hydraulic clamp, and a workpiece pre-positioning tray is arranged on the clamp and used for pre-positioning the workpiece. The workpiece pre-positioning tray is controlled by a pre-positioning oil cylinder to ascend and descend. When the workpiece prepositioning tray descends to a set position, each clamping oil cylinder clamps the workpiece on the tray.
At present, the action control of the pre-positioning oil cylinder is open loop control, and a machine tool numerical control system carries out the action control according to a set program, so that effective detection feedback is lacked. Therefore, if the pre-positioning oil cylinder drives the workpiece pre-positioning tray to fall to an unset position, or the pre-positioning oil cylinder fails to act, the workpiece is clamped improperly or is not clamped tightly, and dangerous conditions such as damage of a clamp, falling of the workpiece, breakage and flying of a cutter and the like can be generated if the workpiece is machined, so that great potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a feedback device who detects work piece prepositioning tray decline position.
In order to achieve the purpose, the feedback device for detecting the descending position of the workpiece prepositioning tray is characterized by comprising a main body, an action rod, a cylindrical pin, a spring plunger and a gas sensitive element; wherein,
the main body is arranged on a fixture body and comprises a longitudinal through hole and a transverse air passage which are communicated with each other, and the transverse air passage is divided into a first air passage and a second air passage by the longitudinal through hole; the longitudinal through hole is formed by a first through hole and a second through hole which are sequentially communicated from top to bottom, wherein the inner diameter of the first through hole is larger than that of the second through hole;
the action rod comprises a first rod body and a second rod body which are integrally formed, and the second rod body and part of the first rod body sequentially extend into the longitudinal through hole of the main body; the first rod body and the second rod body are both columnar, the inner diameter of the first rod body is the same as that of the first through hole, the inner diameter of the second rod body is the same as that of the second through hole, and a step is generated at the joint of the first rod body and the second rod body; a sliding groove is longitudinally formed in the first rod body, a cylindrical pin fixed on the main body is connected with the sliding groove in a sliding mode, and the upper end of the second rod body of the action rod slides up and down in the range of the first through hole and the second through hole of the main body;
the main body part of the spring plunger is fixed on the fixture body, the head part of the spring plunger extends upwards into the second through hole of the main body and abuts against the lower end of the second rod body, the spring plunger is always in a compression state in the process of up-and-down movement of the action rod, and the compression stroke of the spring plunger under the action of the workpiece pre-positioning tray is smaller than the distance between the descending position of the workpiece pre-positioning tray and the workpiece positioning surface; and,
the workpiece pre-positioning tray moves downwards under the driving of the pre-positioning oil cylinder, and in the process that the workpiece pre-positioning tray abuts against the upper end of the action rod below the workpiece pre-positioning tray and drives the action rod to synchronously move downwards, the spring plunger is further compressed, the first rod body with the same inner diameter as the first through hole gradually blocks the first air passage and the second air passage, and a gap formed by the first air passage, the second rod body and the inner wall of the first through hole and an air flow passage formed by the second air passage are gradually closed; in the process, a gas sensitive element used for detecting whether the second air passage has air flow passing through transmits a signal whether the air flow is detected to the main control module in real time;
when the workpiece pre-positioning tray moves upwards under the driving of the pre-positioning oil cylinder and the action rod synchronously moves upwards under the action of the compression elasticity of the spring plunger, a second rod body with the same inner diameter as the second through hole gradually rises to the height flush with the first air passage and the second air passage, and an air flow passage consisting of the first air passage, a gap formed by the second rod body and the inner wall of the first through hole and the second air passage is gradually formed; and in the process, the gas sensitive element transmits a signal whether the gas flow is detected or not to the main control module in real time.
Preferably, the first air passage is communicated with a detection air passage of the clamp body, and an O-shaped sealing ring is arranged at the joint of the first air passage and the detection air passage.
Preferably, the body is bolted to the clamp body.
Preferably, the sliding groove is in a track shape.
The beneficial effects of the utility model reside in that, detect the feedback device's of work piece prepositioning tray decline position simple structure, make simple to operate, give lathe numerical control system (host system promptly) through the detection feedback signal of atmospheric pressure, press from both sides tight hydro-cylinder side and implement to press from both sides tightly, press from both sides the safer and more reliable of tight process. The feedback device realizes closed-loop feedback of the pre-positioning tray position, avoids accidental damage of the clamp and eliminates potential safety hazards.
Drawings
Fig. 1 shows a schematic structural diagram of a feedback device for detecting a descending position of a workpiece pre-positioning tray, in which an air flow channel inside the feedback device is in an open state.
Fig. 2 shows a schematic structural diagram of a feedback device for detecting a descending position of a workpiece pre-positioning tray, in which an air flow channel inside the feedback device is in a closed state.
Fig. 3 shows a schematic structural view of the body shown in fig. 1 and 2.
Fig. 4 shows a schematic view of the structure of the actuating lever shown in fig. 1 and 2.
Fig. 5 shows a schematic structural view of the cylindrical pin shown in fig. 1 and 2.
Fig. 6 shows a schematic view of the installation of the feedback device.
Fig. 7 is a schematic block diagram of a feedback device for detecting a lowering position of a workpiece pre-positioning tray according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the following drawings and embodiments:
as shown in fig. 1 to 7, the feedback device 200 for detecting the descending position of the workpiece prepositioning tray 300 includes a main body 1, an actuating rod 2, a cylindrical pin 3, a spring plunger 4, and a gas sensor 101. Wherein:
the body 1 is fixed on a clamp body 7 by bolts 5, referring to fig. 3, the body 1 comprises a longitudinal through hole and a transverse air passage, which are communicated with each other and are preferably vertically staggered, and the transverse air passage is divided into a first air passage 8 at the left side and a second air passage 9 at the right side by the longitudinal through hole. Wherein, the left end of the first air passage 8 is communicated with a detection air passage in the clamp body 7 (the detection air passage is arranged in the clamp body 7 and is communicated with an air supply source to provide air required by the feedback device), and an O-shaped sealing ring 6 is arranged at the joint of the first air passage 8 and the detection air passage; the gas sensor 101 is arranged at the right outlet of the second air passage 9, and the gas sensor 101 is used for detecting whether airflow flows through the second air passage 9; in particular, the gas sensor 101 can also be arranged in the second gas duct 9. The longitudinal through hole is composed of a first through hole 11, a second through hole 12 and a third through hole 13 which are sequentially communicated from top to bottom, and central axes of the first through hole 11, the second through hole 12 and the third through hole 13 are on the same straight line. In addition, in order to form the air flow passage, the inner diameter of the first through hole 11 is larger than that of the second through hole 12, i.e., a step 14 is formed at the junction of the first through hole 11 and the second through hole 12.
Referring to fig. 4, the actuating rod 2 includes a first rod body 21 and a second rod body 22 which are integrally formed, and the second rod body 22 and a part of the first rod body 21 sequentially extend into the longitudinal through hole of the main body 1; the first rod body 21 and the second rod body 22 are both columnar, the inner diameter of the first rod body 21 is the same as that of the first through hole 11, and the inner diameter of the second rod body 22 is the same as that of the second through hole 12, so that a step matched with the step 14 on the main body 1 is also generated at the joint of the first rod body 21 and the second rod body 22, and the step 14 is arranged to prepare for forming the airflow channel. Meanwhile, a runway-shaped sliding groove 23 is longitudinally formed in the first rod body 21, the cylindrical pin 3 fixed on the main body 1 is slidably connected with the sliding groove 23, and the upper end of the second rod body 22 of the action rod 2 slides up and down in the range of the first through hole 11 and the second through hole 12 of the main body 1 under the action of the sliding groove 23 and the cylindrical pin 3.
The spring plunger 4 is fixed on the fixture body 7, the head of the spring plunger 4 extends upwards into the third through hole 13 of the main body 1, the compression stroke of the spring plunger 4 under the action of the workpiece pre-positioning tray is smaller than the distance between the descending position of the workpiece pre-positioning tray 300 and the workpiece positioning surface, and meanwhile, when the pre-positioning tray is in the descending position, the spring plunger is in a state of half of the maximum compression amount. And the top end of the action rod is positioned between the workpiece positioning surface and the pre-positioning tray descending position after the feedback device is installed. Therefore, the action rod can be pressed down only when the pre-positioning tray falls below the workpiece positioning surface, the air flow channel is further closed, the workpiece pre-positioning tray 300 is ensured to be lower than the workpiece positioning surface, the workpiece really falls to the workpiece positioning surface for positioning and then is clamped, the accidental damage of the clamp caused by the fact that the pre-positioning tray oil cylinder fails or the pre-positioning tray does not fall in place is avoided, and the potential safety hazards that the clamping is improper and the like due to the fact that the workpiece does not fall to the workpiece positioning surface are eliminated.
Referring to fig. 6, the workpiece pre-positioning tray 300 moves up and down under the driving of the pre-positioning cylinder 102, and the workpiece pre-positioning tray 300 is lifted above the workpiece positioning surface and lowered below the workpiece positioning surface. After the feedback device 200 is installed, the top end of the action rod 2 is positioned between the workpiece positioning surface and the pre-positioning tray 300 descending position. When the workpiece pre-positioning tray 300 descends to a position below the workpiece positioning surface and is about to reach the descending position of the pre-positioning tray 300 in the descending process, the top end of the actuating rod 2 is touched, the actuating rod 2 is pressed downwards, the actuating rod 2 acts on the head of the spring plunger 4, and then the spring in the spring plunger 4 is compressed. In the process that the first rod body 21 of the action rod 2 gradually descends, the first rod body 21 with the same inner diameter as the first through hole 11 gradually blocks the first air passage 8 and the second air passage 9, and an air flow passage formed by the first air passage 8, a gap formed by the second rod body 22 and the inner wall of the first through hole 11 and an air flow passage formed by the second air passage 9 are closed; the gas sensor 101 for detecting whether there is a gas flow in the second gas channel 9 transmits a signal that no gas flow is detected to the main control module 100. Referring to fig. 7, the main control module 100 controls the pre-positioning oil cylinder 102 to descend, so that the workpiece pre-positioning tray 300 is lower than the workpiece positioning surface, and further cuts off the airflow path, the gas sensor 101 transmits a signal that no airflow is detected to the main control module 100, at this time, the workpiece on the workpiece positioning surface can be clamped by the clamping oil cylinder 103, and at this time, the main control module 100 controls the clamping oil cylinder 103 to start the action of clamping the workpiece.
When the pre-positioning tray 300 is raised, the operating lever 2 is returned by the urging force of the spring inside the spring plunger 4. When the action rod 2 is reset, the cylindrical pin 3 fixed on the main body 1 is arranged at the lowest end of the sliding groove 23 of the action rod 2, the upper end of the second rod body 22 and the transverse air passage are on the same horizontal line, a gap formed by the first air passage 8, the second rod body 22 and the inner wall of the first through hole 11 and the second air passage 9 form an air flow passage, the air-sensitive element 101 for detecting whether air flow exists in the second air passage transmits a signal of detected air flow to the main control module 100, and the main control module 100 controls the clamping oil cylinder 103 not to clamp a workpiece.
The feedback device 200 for detecting the descending position of the workpiece prepositioning tray 300 is simple in structure and convenient to manufacture and install, and feeds back a signal to a numerical control system (namely the main control module 100) of a machine tool through detection of air pressure, so that clamping is implemented at the side of the clamping oil cylinder 103, and the clamping process is safer and more reliable. The feedback device 200 realizes closed-loop feedback of the position of the pre-positioning tray 300, avoids accidental damage of the clamp and eliminates potential safety hazards.
In summary, the preferred embodiments of the present invention are only described, and the scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the content of the claims of the present invention shall fall within the technical scope of the present invention.
Claims (4)
1. A feedback device for detecting the descending position of a workpiece prepositioning tray is characterized in that: the feedback device comprises a main body, an action rod, a cylindrical pin, a spring plunger and a gas-sensitive element; wherein,
the main body is arranged on a fixture body and comprises a longitudinal through hole and a transverse air passage which are communicated with each other, and the transverse air passage is divided into a first air passage and a second air passage by the longitudinal through hole; the longitudinal through hole is formed by a first through hole and a second through hole which are sequentially communicated from top to bottom, wherein the inner diameter of the first through hole is larger than that of the second through hole;
the action rod comprises a first rod body and a second rod body which are integrally formed, and the second rod body and part of the first rod body sequentially extend into the longitudinal through hole of the main body; the first rod body and the second rod body are both columnar, the inner diameter of the first rod body is the same as that of the first through hole, the inner diameter of the second rod body is the same as that of the second through hole, and a step is generated at the joint of the first rod body and the second rod body; a sliding groove is longitudinally formed in the first rod body, a cylindrical pin fixed on the main body is connected with the sliding groove in a sliding mode, and the upper end of the second rod body of the action rod slides up and down in the range of the first through hole and the second through hole of the main body;
the main body part of the spring plunger is fixed on the fixture body, the head part of the spring plunger extends upwards into the second through hole of the main body and abuts against the lower end of the second rod body, the spring plunger is always in a compression state in the process of up-and-down movement of the action rod, and the compression stroke of the spring plunger under the action of the workpiece pre-positioning tray is smaller than the distance between the descending position of the workpiece pre-positioning tray and the workpiece positioning surface; and,
the workpiece pre-positioning tray moves downwards under the driving of the pre-positioning oil cylinder, and in the process that the workpiece pre-positioning tray abuts against the upper end of the action rod below the workpiece pre-positioning tray and drives the action rod to synchronously move downwards, the spring plunger is further compressed, the first rod body with the same inner diameter as the first through hole gradually blocks the first air passage and the second air passage, and a gap formed by the first air passage, the second rod body and the inner wall of the first through hole and an air flow passage formed by the second air passage are gradually closed; in the process, a gas sensitive element used for detecting whether the second air passage has air flow passing through transmits a signal whether the air flow is detected to the main control module in real time;
when the workpiece pre-positioning tray moves upwards under the driving of the pre-positioning oil cylinder and the action rod synchronously moves upwards under the action of the compression elasticity of the spring plunger, a second rod body with the same inner diameter as the second through hole gradually rises to the height flush with the first air passage and the second air passage, and an air flow passage consisting of the first air passage, a gap formed by the second rod body and the inner wall of the first through hole and the second air passage is gradually formed; and in the process, the gas sensitive element transmits a signal whether the gas flow is detected or not to the main control module in real time.
2. A feedback device for detecting a lowered position of a workpiece pre-positioning tray according to claim 1, wherein: the first air passage is communicated with the detection air passage of the clamp body, and an O-shaped sealing ring is arranged at the joint of the first air passage and the detection air passage.
3. A feedback apparatus for detecting a lowered position of a workpiece prepositioning tray according to claim 1 or 2, wherein: the main body is fixedly arranged on the clamp body through a bolt.
4. A feedback apparatus for detecting a lowered position of a workpiece prepositioning tray according to claim 1 or 2, wherein: the sliding groove is in a track shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056361 CN203156456U (en) | 2013-01-31 | 2013-01-31 | Feedback device for detecting descending position of workpiece prepositioning tray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056361 CN203156456U (en) | 2013-01-31 | 2013-01-31 | Feedback device for detecting descending position of workpiece prepositioning tray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203156456U true CN203156456U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320056361 Expired - Lifetime CN203156456U (en) | 2013-01-31 | 2013-01-31 | Feedback device for detecting descending position of workpiece prepositioning tray |
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| CN (1) | CN203156456U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111913A (en) * | 2013-01-31 | 2013-05-22 | 安徽江淮汽车股份有限公司 | Feedback device for detecting descending position of workpiecepretargeting tray |
| CN109465649A (en) * | 2018-12-28 | 2019-03-15 | 上汽通用五菱汽车股份有限公司 | A kind of elevation and subsidence regulating device of single pole double-acting piston hydraulic cylinder |
-
2013
- 2013-01-31 CN CN 201320056361 patent/CN203156456U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111913A (en) * | 2013-01-31 | 2013-05-22 | 安徽江淮汽车股份有限公司 | Feedback device for detecting descending position of workpiecepretargeting tray |
| CN103111913B (en) * | 2013-01-31 | 2014-12-10 | 安徽江淮汽车股份有限公司 | Feedback device for detecting descending position of workpiecepretargeting tray |
| CN109465649A (en) * | 2018-12-28 | 2019-03-15 | 上汽通用五菱汽车股份有限公司 | A kind of elevation and subsidence regulating device of single pole double-acting piston hydraulic cylinder |
| CN109465649B (en) * | 2018-12-28 | 2024-05-10 | 上汽通用五菱汽车股份有限公司 | Lifting adjusting device of single-rod double-acting piston type hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130828 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |