CN209936374U - Clamping device for turning small parts capable of preventing hands from being clamped - Google Patents
Clamping device for turning small parts capable of preventing hands from being clamped Download PDFInfo
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- CN209936374U CN209936374U CN201920755002.XU CN201920755002U CN209936374U CN 209936374 U CN209936374 U CN 209936374U CN 201920755002 U CN201920755002 U CN 201920755002U CN 209936374 U CN209936374 U CN 209936374U
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- reversing valve
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- thimble
- clamping device
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- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 8
- 238000007664 blowing Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of digit control machine tool accessories, especially, relate to a clamping device of turning finding minor details of preventing tong, including pneumatic tailstock, pneumatic control system and air gun, pneumatic tailstock includes tailstock, cylinder and thimble, the thimble is connected with the piston rod of cylinder through the connecting axle that slides and sets up in the tailstock, and fixed on the lathe main shaft is provided with anchor clamps, lathe main shaft, anchor clamps and thimble coaxial setting in proper order; the pneumatic control system comprises a first reversing valve, the first reversing valve is used for controlling a piston rod to be close to or far away from the clamp to move, a one-way throttle valve is connected between the first reversing valve and a cylinder, the air gun is connected with the first reversing valve through a second reversing valve, a pressure relay is connected onto the cylinder, and the pressure relay is electrically connected with the second reversing valve. Has the advantages that: this clamping device realizes earlier the primary positioning work piece, loosens the left hand after, and the thimble presss from both sides the order action of tight work piece again, thoroughly stops the risk that the thimble pressed from both sides the finger.
Description
Technical Field
The utility model belongs to the technical field of the digit control machine tool annex, especially, relate to a clamping device of turning finding of preventing tong.
Background
The degree of automation of digit control machine tool is higher relatively, in order to realize quick clamping's purpose, its supporting tailstock adopts pneumatics or hydraulic drive usually. However, this type of machine tool is not necessarily matched with an automatic feeding mechanism, for example, a simple numerically controlled lathe of a single-board type uses a tailstock thimble to clamp a workpiece, and an operator needs to hold the workpiece with a hand before pushing the workpiece tightly, so that it is not difficult to manually feed parts with large diameters and slender shaft parts, and the operation is also very safe. If the diameter and the length of the part are relatively small, the hand holding part is close to the top part of the part to be gripped, so that the vicious accident that fingers are gripped easily occurs once an operator neglects carelessness or fatigues, and the damage and the injury are brought to companies and individuals. The safety accident has occurred many times over the years, and all workshops also take precautions against the safety accident, but basically, the safety accident is mainly based on strengthening training, and requires staff to improve attention, but the effect is not good all the time, because people can have negligence. Therefore, a new clamping scheme for turning small parts needs to be established, so that human influence factors are reduced, and safety risks are reduced.
The company has improved the above risks and has achieved certain applications, as described in the following two patent documents:
patent document CN207255270U provides a pneumatic tailstock mistake proofing device, and it specifically discloses that after receiving the signal through photoelectric switch, the solenoid valve is closed, blocks gaseous entering tailstock cylinder, prevents the ejecting action of pneumatic tailstock promptly, guarantees operating personnel safety to and the pneumatic tailstock mistake proofing device of equipment safety. From the application, the cost of the photoelectric device, especially the grating, is high, the photoelectric element is easy to deviate from a control point and is easy to damage by the vibration of a machine tool, and the control effect is also easy to lose effect. The photoelectric element is a vulnerable part, and the maintenance cost is high.
Patent document CN108941631A provides a lathe motor tailstock preventing hands from being clamped, which specifically discloses a hand-clamping preventing tailstock consisting of a motor tailstock, a pneumatic control system and an elastic center. The step-by-step jacking structure is adopted, the ball head end of the outer sleeve is firstly contacted with a workpiece, the axial stress of the spring is only 1-2N during initial contact, the compression amount of the spring is 18-22 mm, and if the ball head end of the outer sleeve is pressed to a finger, the finger is light. And secondly, formally pressing the workpiece after the workpiece is initially contacted. From the current application effect, the safety effect of preventing hands from being clamped is good. The time for clamping the workpiece is delayed due to the adoption of the step-by-step clamping device, so that the machining efficiency is influenced to a certain extent; meanwhile, the machine tool is changed at a certain cost, and in addition, the compression spring is continuously compressed and is easy to lose efficacy. In a word, the patent cannot fundamentally prevent the risk that the thimble clamps the finger.
SUMMERY OF THE UTILITY MODEL
Have the problem that the operative employee pointed to and has the pressed from both sides risk for solving prior art's pneumatic tailstock, the utility model provides a prevent clamping device of turning finding of tong, this clamping device simple structure, preparation are easy, safe in utilization, can fundamentally stop the risk of pressing from both sides the finger.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows, a clamping device for small turning parts capable of preventing hand clamping comprises a pneumatic tailstock, a pneumatic control system and an air gun, wherein the pneumatic tailstock comprises a tailstock, an air cylinder and an ejector pin, the ejector pin is connected with a piston rod of the air cylinder through a connecting shaft arranged in the tailstock in a sliding manner, a clamp is fixedly arranged on a lathe spindle, and the lathe spindle, the clamp and the ejector pin are sequentially and coaxially arranged;
the pneumatic control system comprises a first reversing valve, the first reversing valve is used for controlling a piston rod to be close to or far away from the clamp to move, a one-way throttle valve is connected between the first reversing valve and a cylinder, the air gun is connected with the first reversing valve through a second reversing valve, a pressure relay is connected onto the cylinder, and the pressure relay is electrically connected with the second reversing valve.
Preferably, a fixed frame is fixedly arranged on the lathe, and the air gun is fixedly arranged on the fixed frame. But the air gun joint is on the mount, and the placing of the air gun of being convenient for improves this clamping device operational environment's regularity, and the field operation of being convenient for improves the operational safety nature.
Preferably, the air gun is a snake-shaped metal hose. The air gun is a snake-shaped metal hose with adjustable shape and has moderate rigidity and flexibility; before the workpiece to be processed is replaced each time, the metal hose can be manually bent, and the air blowing position and the air blowing angle are adjusted, so that the air gun directly blows the workpiece, the air blowing direction of the air gun can be conveniently controlled and adjusted, and the best effect of initially positioning the workpiece by air flow is achieved.
Preferably, the cylinder comprises a first piston cavity and a second piston cavity which are positioned at two sides of the piston, and when the piston moves towards the first piston cavity, the piston rod moves close to the clamp; the first reversing valve is a two-position four-way manual reversing valve, a working port A of the first reversing valve is communicated with a first piston cavity, a working port B of the first reversing valve is communicated with a second piston cavity, an air inlet T of the first reversing valve is communicated with compressed air, an air outlet P of the first reversing valve is communicated with the atmosphere, and the one-way throttle valve and the second reversing valve are respectively communicated with the working port B of the first reversing valve.
Furthermore, the second reversing valve is a two-position three-way electromagnetic reversing valve, a working port A of the second reversing valve is communicated with the air gun, and an air inlet T of the second reversing valve is communicated with a working port B of the first reversing valve.
Has the advantages that: the utility model discloses a prevent clamping device of turning finding of tong, compressed air is simultaneously through the work mouth B army branch two tunnel of first switching-over valve: one path is as follows: the workpiece enters the air gun through the second reversing valve, and the compressed gas for the air gun is taken up by the right hand to blow the workpiece directly at the moment, so that the left hand is released after the workpiece is initially positioned; the other path is as follows: and the piston rod drives the thimble to move close to the clamp until the thimble tightly pushes the workpiece. The movement speed of the piston rod is limited due to the action of the one-way throttle valve, so that the time for clamping the workpiece by the ejector pin is delayed by 2-3 seconds compared with the time for directly blowing the workpiece by the air gun, and the left hand is loosened and separated from the workpiece, so that the aims of sequentially positioning the workpiece firstly and clamping the workpiece by the ejector pin after loosening the left hand are fulfilled, and the risk of clamping fingers by the ejector pin can be thoroughly avoided; the clamping device has simple structure, easy manufacture without changing a machine tool, low cost and safe and convenient use.
Drawings
FIG. 1 is a schematic structural view of the clamping device for clamping the small turning parts;
FIG. 2 is a schematic diagram of a pneumatic control system of the clamping device for clamping the turning small parts;
FIG. 3 is a schematic view of the air gun working state of the clamping device for clamping the small turning parts;
the direction of the arrows in fig. 3 indicates the direction of the jet pressure air flow;
in the figure: 11. the device comprises a tailstock, 12, a cylinder, 121, a piston, 122, a first piston cavity, 123, a second piston cavity, 124, a piston rod, 13, a thimble, 14, a connecting shaft, 21, a first reversing valve, 22, a second reversing valve, 23, a pressure relay, 24, a one-way throttle valve, 31, an air gun, 32, a fixed frame, 4, a lathe spindle, 5, a clamp, 6, a flange plate, 7 and a workpiece; the point O is the fulcrum of the clamp, and the point G is the center of gravity of the workpiece.
Detailed Description
Examples
As shown in fig. 1 to 3, the clamping device for clamping the turning small parts comprises a pneumatic tailstock, a pneumatic control system and an air gun 31, wherein the pneumatic tailstock comprises a tailstock 11, an air cylinder 12 and a thimble 13, the tailstock 11 is fixedly arranged on a lathe base, the air cylinder 12 is arranged on the tailstock 11 through a fastener, the thimble 13 is connected with a piston rod 124 of the air cylinder 12 through a connecting shaft 14 which is slidably arranged in the tailstock 11, a clamp 5 is fixedly arranged on a lathe spindle 4 through a flange 6, the lathe spindle 4, the clamp 5 and the thimble 13 are coaxially arranged in sequence, and the distance between the tight-pushing ends of the clamp 5 and the thimble 13 at the tight-pushing position is equal to the width of a workpiece 7; the cylinder 12 comprises a first piston cavity 122 and a second piston cavity 123 which are positioned at two sides of a piston 121, and when the piston 121 moves towards the first piston cavity 122, the piston rod 124 moves close to the clamp 5;
as shown in fig. 2, the pneumatic control system comprises a first reversing valve 21, the first reversing valve 21 is used for controlling the piston rod 124 to move close to or away from the clamp 5, a one-way throttle valve 24 is connected between the first reversing valve 21 and the air cylinder 12, the air gun 31 is connected with the first reversing valve 21 through a second reversing valve 22, a pressure relay 23 is connected on the air cylinder 12, and the pressure relay 23 is electrically connected with the second reversing valve 22; specifically, the first reversing valve 21 is a two-position four-way manual reversing valve, the first reversing valve 21 is fixedly arranged on the tailstock 11, a working port a of the first reversing valve 21 is communicated with a first piston cavity 122, a working port B of the first reversing valve 21 is communicated with a second piston cavity 123, an air inlet T of the first reversing valve 21 is communicated with compressed air, an air outlet P of the first reversing valve 21 is communicated with the atmosphere, and the one-way throttle valve 24 and the second reversing valve 22 are respectively communicated with the working port B of the first reversing valve 21; the second reversing valve 22 is a two-position three-way electromagnetic reversing valve, a working port A of the second reversing valve 22 is communicated with the air gun 31, and an air inlet T of the second reversing valve 22 is communicated with a working port B of the first reversing valve 21.
As shown in fig. 1, in order to control and adjust the blowing direction of the air gun 31, a serpentine metal hose is used as the air gun 31; in order to facilitate the placement of the air gun 31, a fixing frame 32 is fixedly arranged on the lathe, the air gun 31 is fixedly arranged on the fixing frame 32, the air gun 31 can be clamped on the fixing frame 32, and the air blowing direction of the air gun 31 can be adjusted by bending the air gun 31, so that the uniformity of the working environment of the clamping device is improved, the field operation is facilitated, and the operation safety is improved.
As shown in fig. 3, the workpiece 7 to be clamped in this embodiment is exemplified by a differential bevel gear, according to the principle of lever, the fulcrum is below the toothed fixture 5, the center of gravity is at the center of the workpiece 7, and if the workpiece 7 is loaded into the fixture 5, and the workpiece 7 is turned over downwards and falls off with the fulcrum as a support after being loosened by hand. As shown in fig. 3, point O is a fulcrum of the fixture, point G is a center of gravity of the workpiece 7, and the arrow direction indicates a direction of the jet-pressing air flow, and the jet-pressing air flow should be blown straight at the upper right of the workpiece 7 according to the force arm principle, so that the optimal effect of clamping the workpiece 7 can be achieved.
The working principle is as follows:
1. the feeding process comprises the following steps:
①, the air gun 31 is bent in advance according to the workpiece 7 to be clamped, and the air spraying direction is adjusted, as shown in fig. 1 and 3;
② cleaning scrap iron and other impurities on the clamp 5, and then taking the workpiece 7 with the left hand and loading the workpiece onto the clamp 5;
③ the first reversing valve 21 is pushed leftwards by the right hand, the left position of the first reversing valve 21 is communicated with compressed air, the compressed air is divided into two paths through the working port B of the first reversing valve 21, one path of the compressed air enters the air gun 31 through the second reversing valve 22, the air gun 31 directly blows the upper right side of the workpiece 7 by the compressed air, the workpiece 7 is initially positioned, and then the left hand is loosened, the other path of the compressed air enters the second piston cavity 123 of the air cylinder 12 through the one-way throttle valve 24, the piston 121 is pushed to the first piston cavity 122, the piston rod 124 drives the thimble 13 to move close to the clamp 5 at the same time, until the thimble 13 tightly pushes the workpiece 7, the moving speed of the piston rod 124 is limited due to the action of the one-way throttle valve 24, the time for the thimble 13 to clamp the workpiece 7 is prolonged by 2-3 seconds compared with the time for the air gun 31 to directly blow the workpiece 7 (the time length can be controlled by adjusting the opening of the one-way throttle valve 24), at this time, the left hand is loosened and the workpiece 7 is separated from the workpiece 7, the initial positioning is realized;
2. the processing process comprises the following steps:
④ the left hand presses the start switch of the lathe spindle 4, the lathe spindle 4 starts to rotate, the workpiece 7 is turned, at this time, the pressure of the second piston cavity 123 of the cylinder 12 rises to the effect of the pressure relay 23, the pressure relay 23 controls the second reversing valve 22 to be electrified to start reversing, and the second solenoid valve controls the air gun 31 to stop air injection;
3. the unloading process comprises the following steps:
⑤ when the machining is finished, the lathe spindle 4 stops rotating, the left hand presses the workpiece 7, the right hand pushes the first direction valve 21 to the right, the right position of the first direction valve 21 is communicated with compressed air, the compressed air enters the first piston cavity 122 of the cylinder 12 through the working port A of the first direction valve 21, the piston 121 is pushed to the second piston cavity 123, the piston rod 124 drives the thimble 13 to move away from the clamp 5, the position is returned, the second piston cavity 123 of the cylinder 12 is directly communicated with the atmosphere from the air outlet P of the first direction valve 21 through the one-way throttle valve 24, at this time, the left hand can unload the workpiece 7, the machining of the workpiece 7 is finished, and the steps ② - ⑤ are repeated to finish the machining of a batch of workpieces 7.
Claims (5)
1. The utility model provides a prevent clamping device of turning finding of tong which characterized in that: the pneumatic tail frame comprises a tail frame (11), an air cylinder (12) and a thimble (13), wherein the thimble (13) is connected with a piston rod (124) of the air cylinder (12) through a connecting shaft (14) which is arranged in the tail frame (11) in a sliding manner, a clamp (5) is fixedly arranged on a lathe spindle (4), and the lathe spindle (4), the clamp (5) and the thimble (13) are sequentially and coaxially arranged;
the pneumatic control system comprises a first reversing valve (21), the first reversing valve (21) is used for controlling a piston rod (124) to be close to or far away from a clamp (5) to move, a one-way throttle valve (24) is connected between the first reversing valve (21) and a cylinder (12), an air gun (31) is connected with the first reversing valve (21) through a second reversing valve (22), a pressure relay (23) is connected to the cylinder (12), and the pressure relay (23) is electrically connected with the second reversing valve (22).
2. The clamping device for the anti-pinch turning small parts as claimed in claim 1, characterized in that: a fixed frame (32) is fixedly arranged on the lathe, and the air gun (31) is fixedly arranged on the fixed frame (32).
3. The clamping device for the anti-pinch turning small parts as claimed in claim 2, characterized in that: the air gun (31) is made of a snake-shaped metal hose.
4. The clamping device for anti-pinch turning small parts as claimed in claim 1, 2 or 3, is characterized in that: the cylinder (12) comprises a first piston cavity (122) and a second piston cavity (123) which are positioned at two sides of a piston (121), and when the piston (121) moves towards the first piston cavity (122), the piston rod (124) moves close to the clamp (5); the two-position four-way manual reversing valve is used as the first reversing valve (21), a working port A of the first reversing valve (21) is communicated with a first piston cavity (122), a working port B of the first reversing valve (21) is communicated with a second piston cavity (123), an air inlet T of the first reversing valve (21) is communicated with compressed air, an air outlet P of the first reversing valve (21) is communicated with the atmosphere, and the one-way throttle valve (24) and the second reversing valve (22) are communicated with the working port B of the first reversing valve (21) respectively.
5. The clamping device of turning small parts for preventing hand pinching of claim 4, wherein: the second reversing valve (22) is a two-position three-way electromagnetic reversing valve, a working port A of the second reversing valve (22) is communicated with the air gun (31), and an air inlet T of the second reversing valve (22) is communicated with a working port B of the first reversing valve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920755002.XU CN209936374U (en) | 2019-05-23 | 2019-05-23 | Clamping device for turning small parts capable of preventing hands from being clamped |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920755002.XU CN209936374U (en) | 2019-05-23 | 2019-05-23 | Clamping device for turning small parts capable of preventing hands from being clamped |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209936374U true CN209936374U (en) | 2020-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920755002.XU Withdrawn - After Issue CN209936374U (en) | 2019-05-23 | 2019-05-23 | Clamping device for turning small parts capable of preventing hands from being clamped |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209936374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076592A (en) * | 2019-05-23 | 2019-08-02 | 江苏太平洋齿轮传动有限公司 | A kind of clamping device of the turning small part of finger |
-
2019
- 2019-05-23 CN CN201920755002.XU patent/CN209936374U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076592A (en) * | 2019-05-23 | 2019-08-02 | 江苏太平洋齿轮传动有限公司 | A kind of clamping device of the turning small part of finger |
| CN110076592B (en) * | 2019-05-23 | 2024-05-03 | 江苏太平洋齿轮传动有限公司 | Clamping device for turning small part with clamping prevention function |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240503 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240503 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |