CN102809471B - Helical compression spring sorting machine - Google Patents
Helical compression spring sorting machine Download PDFInfo
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- CN102809471B CN102809471B CN201210277591.8A CN201210277591A CN102809471B CN 102809471 B CN102809471 B CN 102809471B CN 201210277591 A CN201210277591 A CN 201210277591A CN 102809471 B CN102809471 B CN 102809471B
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- bearing plate
- force bearing
- spring
- pressure
- stationary platform
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Abstract
The invention discloses a helical compression spring sorting machine which is provided a fixed platform. A pressure-driven cylinder is mounted on the fixed platform, a pressure bearing plate is arranged below the fixed platform and is mounted on the fixed platform by the aid of two pairs of first vertical guide rails, a counter weight floating mechanism is arranged below the pressure bearing plate and mounted on the pressure bearing plate by the aid of two pairs of second vertical guide rails, a first inductive sensor for inducting the stop time of a press stroke is mounted on the fixed platform, and a second inductive sensor for inducting the start time of floating is mounted on the pressure bearing plate. Springs are sorted by means of detecting time difference, and quantitative measurement of press pressure and spring compression amount is avoided, so that expensive pressure sensors and mobile sensors are not adopted, a mechanical structure and computing control programming are simplified, and manufacturing cost of the spring sorting machine is reduced greatly.
Description
Technical field
The present invention relates to a kind of separator for spring, specifically, it is a kind of spiral compression spring separator.
Background technology
In prior art, Chinese patent ZL201020622400.7 has announced " a kind of by the measuring tool of free height sorting railway goods train bogie spring ", it can replace vernier caliper to carry out the drift of measuring spring, can alleviate testing staff's labour intensity, but this detection mode still belongs to a kind of manual detection, unrealized robotization, and it can only carry out sorting for this index of spring free length.Existing spiral compression spring separator generally all makes this mechanical action of spring-compressed realize sorting by exerting pressure, in this mechanical action, need with pressure transducer and displacement transducer, the decrement of pressure and spring accurately to be measured, could realize the sorting of similar spring, for example: when spiral compression spring is subject to Uniaxial Compression, in online elastic range, its stress and strain amount is linear, and meet Hooke's law σ=E ε or F=K Δ X, be that stress σ is directly proportional to dependent variable ε, or pressure F is directly proportional to reduction length Δ X, E in formula is constant, K stiffness factor.By measuring the value of decrement Δ x and pressure F, can draw the stiffness factor of tested spring, the spring that stiffness factor is identical is similar spring.Chinese patent ZL88200849.8, ZL01227728.2 all belong to above-mentioned similar separator.Due to this separator for spring employing is a kind of pressure and decrement accurate quantification detection mode, therefore, pressure transducer wherein and the accuracy requirement of displacement transducer are higher, this just makes the cost of sensor very high, in the market applicable to the pressure transducer of separator for spring and the unit price of displacement transducer substantially all more than ten thousand yuan, this should be used for saying for large-scale industrialization, its price is too expensive, and this quantitative detection is also higher to the accuracy requirement of physical construction, its control and calculation procedure be corresponding more complicated also, thereby design and the cost of manufacturing have been increased.
Summary of the invention
The object of the invention is for the problem in prior art, a kind of improved spiral compression spring separator is provided, it has realized drift L by a kind of qualitative checking method
0the similar sorting of the spiral compression spring different with stiffness factor k, and avoid using pressure transducer and the displacement transducer involving great expense, reached the object that reduces cost.
For achieving the above object, technical scheme of the present invention is as follows:
It has a frame, in this frame, be provided with stationary platform, a pressure-driven cylinder is housed in this stationary platform, below this stationary platform, be provided with a pressure force bearing plate, this pressure force bearing plate is arranged in described stationary platform by two pairs of the first vertical guide rails, the piston rod of described pressure-driven cylinder and this pressure force bearing plate are connected, in the upper end of described the first vertical guide rail, be provided with one and press down stroke terminal sensor block, in described stationary platform, be provided with one and press down stroke limit piece; Below described pressure force bearing plate, be provided with a counterweight relocation mechanism, this counterweight relocation mechanism has a unsteady force bearing plate, this unsteady force bearing plate is arranged on described pressure force bearing plate by two pairs of the second vertical guide rails, on described unsteady force bearing plate, be provided with a balancing weight, between this balancing weight and pressure force bearing plate, be provided with a flying height h, below described unsteady force bearing plate, at least connect firmly a spring pressure head; In described stationary platform, be equipped with for responding to and press down the first induction pick-up that stroke stops the moment, the second induction pick-up floating the zero hour for responding to is housed on described pressure force bearing plate.
Further improved technical scheme of the present invention is as follows:
Described unsteady force bearing plate is to frame horizontal extension, and is arranged in frame by a vertical slipway mechanism.
By technique scheme, can find out, the present invention is provided with a counterweight relocation mechanism between the piston rod of pressure-driven cylinder and spring pressure head, and with two induction pick-ups, induces respectively the moment T that counterweight relocation mechanism starts to float in the process of exerting pressure to spring
1with the moment T that presses down stroke termination
2, by the equation of motion of Compress Spring motion process middle distance and speed, can derive T
2-T
1with spring free length L
0, stiffness factor K relational expression, according to this relational expression, can sub-elect three class springs: the one, drift L
0identical and similar spring that stiffness factor K is different; The 2nd, the identical and drift L of stiffness factor K
0different similar springs; The 3rd, drift L
0with stiffness factor K not identical similar spring.Poor (T detection time for the present invention
2-T
1) mode carry out spring sorting, avoided quantitative measurment down force pressure and amount of spring compression, thereby avoided adopting expensive pressure transducer and movable sensor.T of the present invention
1, T
2measurement only need adopt cheap two induction pick-ups (as: magnetic induction switch) can complete above-mentioned measurement, not only measure to calculate and control simple, and physical construction is also simple, and the precision of physical construction is not had to harsh requirement yet, easily realizes.In sum, the present invention changes into qualitative detection by existing quantitative detection, has simplified physical construction and has calculated and control programming, greatly reduces the cost of separator for spring.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is the right view of Fig. 1.
Embodiment
Referring to Fig. 1, 2, it has a frame (1), this frame has an inverted T-shaped frame main body, on the top of this inverted T-shaped frame main body, connect firmly a stationary platform (2), a pressure-driven cylinder (3) is housed in this stationary platform, below this stationary platform, be provided with a pressure force bearing plate (4), this pressure force bearing plate is arranged in described stationary platform (2) by two pairs of the first vertical guide rails (5), the piston rod of described pressure-driven cylinder and this pressure force bearing plate are connected, in the upper end of described the first vertical guide rail (5), be provided with one and press down stroke terminal sensor block (6), in described stationary platform (2), be provided with one and press down stroke limit piece (7), below described pressure force bearing plate, be provided with a counterweight relocation mechanism (8), this counterweight relocation mechanism has a unsteady force bearing plate (8-1), this unsteady force bearing plate is arranged on described pressure force bearing plate by two pairs of the second vertical guide rails (8-2), on described unsteady force bearing plate, be provided with a balancing weight (8-3), between described balancing weight (8-3) and pressure force bearing plate (4), be provided with a flying height h, in the below of described unsteady force bearing plate (4), at least connect firmly a spring pressure head (8-5), in described stationary platform (2), be equipped with for responding to and press down the first induction pick-up (9) that stroke stops the moment, the second induction pick-up (10) floating the zero hour for responding to is housed on described pressure force bearing plate (4).
For the action of counterweight relocation mechanism more steady, described unsteady force bearing plate is to frame (1) horizontal extension, and it is upper to be arranged on frame (1) by a vertical slipway mechanism, described vertical slipway mechanism consists of vertical slide unit (11) and vertical slide rail (12).
Work of the present invention and grading principle are as follows:
One, the testing process of this separator:
Pressure-driven cylinder (3) driving pressure force bearing plate (4) is with constant speed V
0along the first vertical guide rail (5), move downward, when motion starts, control system is write down initial motion T constantly
0; At this moment, counterweight relocation mechanism (8) does not also touch tested spring (13), and it follows pressure force bearing plate (4) and moves downward together under the effect of self gravitation; When counterweight relocation mechanism (8) touches tested spring (13), the Action of Gravity Field of counterweight relocation mechanism is on tested spring, and tested spring produces a compressed shape variable Δ x
1simultaneously, tested spring is to the reacting force of one of counterweight relocation mechanism, stop that counterweight relocation mechanism continues to move downward, at this moment, pressure force bearing plate (4) continues to move downward, suppose that pressure force bearing plate (4) is at this moment static, counterweight relocation mechanism (8) upwards floats with respect to pressure force bearing plate (4), float when starting, the upwards dislocation of relative the second induction pick-up of force bearing plate (8-1) (10) of floating, the second induction pick-up (10) triggers, meanwhile, control system is write down this second induction and is triggered T constantly
1; Counterweight relocation mechanism (8) floats after h distance, balancing weight (8-3) sticks together up and down and continues to move downward with pressure force bearing plate (4), and start to compress tested spring (13), when compression travel is at the end, pressing down stroke terminal sensor block (6) drops on and presses down on stroke limit piece (7), thereby limited cylinder continue press down, at this moment, press down stroke terminal sensor block (6) and the first induction pick-up (9) contraposition, the first induction pick-up (9) triggers, meanwhile, control system is write down this first induction and is triggered T constantly
2; Then control system is carried out computational discrimination, and provides result.Afterwards, whole mechanism starts drawback movement, gets back to original state, waits for the beginning that next time detects circulation.
Two, computational discrimination:
1, suppose:
The stiffness factor of K---spring
L
0---the drift of spring
L
t2---the length after spring-compressed
H---the flying height of counterweight relocation mechanism (8)
Δ x
1---the deflection that spring produces under the effect of counterweight relocation mechanism (8) gravity
V
0---the speed that the constant speed of cylinder presses down
H---the height that pressure force bearing plate (4) moves downward
M---the quality of counterweight relocation mechanism (8)
The quality of m---balancing weight (8-3)
G---acceleration of gravity
H
1---the height that when motion starts to contact with pressure force bearing plate (4) to balancing weight (8-3), pressure force bearing plate moves downward
T
1---the triggered time of the second induction pick-up
T
2---the triggered time of the first induction pick-up
2, computing formula:
By above-mentioned whole motion process, can be drawn:
H=H
1+（L
0—Δx
1） ⑴
Above formula both sides are simultaneously divided by V
0and be out of shape:
According to speed formula and Hooke's law, (2) in formula:
Will be (3) (4) (5) formula substitution formula is (2):
Arrange
Formula (6) in, V
0with M be the constant of default, and Mg < L
0k.
From formula, can find out the poor (T of triggered time of two induction pick-ups (6)
2-T
1) with the drift L of spring
0relevant with the stiffness factor K of spring, according to formula (6), the machine can be carried out similar selection to the spring of following different size:
(a), known drift L
0stiffness factor K identical, spring is different, poor (T of triggered time
2-T
1) depending on the stiffness factor K of tested spring, its method for separating is as follows:
Select the spring S of a unknown stiffness factor as demarcating spring, correspondence records demarcates poor (T of spring S triggered time
2-T
1), then this triggered time difference is set as to examination criteria, as poor (T of the triggered time recording of other spring
2-T
1) with demarcate spring when identical, can determine that this tested spring is identical with demarcation spring S.
(b), identical, the drift L of known stiffness factor K
0difference, poor (T of triggered time
2-T
1) depend on its drift L
0, its method for separating is as follows:
Select a unknown free length L
0tested spring S as demarcating spring, correspondence records demarcates poor (T of spring triggered time
2-T
1), then this triggered time difference is set as to examination criteria, as poor (T of the triggered time recording of other spring
2-T
1) with demarcate spring when identical, can determine that this tested spring is identical with demarcation spring S.
(c), known drift L
0not identical with stiffness factor K, poor (T of triggered time
2-T
1) depend on its drift L
0with stiffness factor K, its method for separating is as follows:
Select a unknown free length L
0as demarcating spring, correspondence records the poor (T of triggered time that demarcates spring with the spring S of stiffness factor K
2-T
1), then this triggered time difference is set as to examination criteria, as poor (T of the triggered time recording of other spring
2-T
1) with demarcate spring when identical, can determine that this tested spring is identical with demarcation spring S.
In above-mentioned detection, may exist demarcation spring S different from drift and the stiffness factor of tested spring, but the mistiming (T recording
2-T
1) identical, will there is in this case erroneous judgement, for avoiding this erroneous judgement, need before above-mentioned detection, with the quality m that adjusts balancing weight, proofread and correct, its updating formula is derived as follows:
If: the drift of demarcating spring S is L
1, its stiffness factor is K
1, the drift that tested spring is is L
2, its stiffness factor is K
2.
By L
1, K
1and L
2, K
2(6), then the two formula equal sign left sides equate to obtain following formula to substitution formula respectively:
Arrange:
According to formula (7), adjust the quality m of balancing weight, make
can avoid above-mentioned flase drop.
3, the restrictive condition of above-mentioned detection:
reason is as follows:
If h=0, means that counterweight relocation mechanism (8) can not float, the second induction pick-up (10) cannot trigger, poor (T of triggered time
2-T
1) cannot calculate.
If
mean when counterweight relocation mechanism 8 touches tested spring, tested spring is not to form to stop to counterweight relocation mechanism (8), but forms springback, thereby causes the false triggering of the second induction pick-up, cannot accurately detect T
1.
Claims (2)
1. a spiral compression spring separator, is characterized in that:
It has a frame (1), in this frame, be provided with stationary platform (2), a pressure-driven cylinder (3) is housed in this stationary platform, below this stationary platform, be provided with a pressure force bearing plate (4), this pressure force bearing plate is arranged in described stationary platform (2) by two pairs of the first vertical guide rails (5), the piston rod of described pressure-driven cylinder and this pressure force bearing plate are connected, in the upper end of described the first vertical guide rail (5), be provided with one and press down stroke terminal sensor block (6), in described stationary platform (2), be provided with one and press down stroke limit piece (7);
In described pressure force bearing plate (4) below, be provided with a counterweight relocation mechanism (8), this counterweight relocation mechanism has a unsteady force bearing plate (8-1), this unsteady force bearing plate is arranged on described pressure force bearing plate by two pairs of the second vertical guide rails (8-2), on described unsteady force bearing plate, be provided with a balancing weight (8-3), between this balancing weight (8-3) and pressure force bearing plate (4), be provided with a flying height h, in the below of described unsteady force bearing plate (8-1), at least connect firmly a spring pressure head (8-5), described flying height h meets following formula:
The stiffness factor of K-spring in formula, the quality of M-counterweight relocation mechanism, g-acceleration of gravity;
In described stationary platform (2), be equipped with for responding to and press down the first induction pick-up (9) that stroke stops the moment, the second induction pick-up (10) floating the zero hour for responding to is housed on described pressure force bearing plate (4).
2. spiral compression spring separator according to claim 1, is characterized in that: described unsteady force bearing plate is to frame (1) horizontal extension, and is arranged in frame (1) by a vertical slipway mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210277591.8A CN102809471B (en) | 2012-08-06 | 2012-08-06 | Helical compression spring sorting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210277591.8A CN102809471B (en) | 2012-08-06 | 2012-08-06 | Helical compression spring sorting machine |
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|---|---|
| CN102809471A CN102809471A (en) | 2012-12-05 |
| CN102809471B true CN102809471B (en) | 2014-11-26 |
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|---|---|---|---|
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| CN106248325A (en) * | 2016-07-12 | 2016-12-21 | 中国地质大学（北京） | Extraordinary probing component wear detection method and detection equipment under a kind of liquid medium |
| CN106525363A (en) * | 2016-08-30 | 2017-03-22 | 浙江万安科技股份有限公司 | Device for detecting relation between displacement and feedback force of elastic part |
| CN109406074B (en) * | 2018-11-15 | 2020-05-19 | 中车石家庄车辆有限公司 | Spring elasticity measuring method |
| CN111551325A (en) * | 2020-03-31 | 2020-08-18 | 厦门理工学院 | Spring height precision measurement device |
| CN111843445B (en) * | 2020-06-29 | 2021-08-17 | 浙江奇碟汽车零部件有限公司 | Damping spring grouping and assembling device for clutch damping spring assembling machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035474U (en) * | 1988-01-26 | 1989-04-05 | 国家机械委武汉计算机外部设备研究所 | Separator for spring |
| SU1727012A1 (en) * | 1989-10-06 | 1992-04-15 | Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт электровозостроения | Device for determining rigidity parameters of helical compression springs |
| CN2484553Y (en) * | 2001-06-29 | 2002-04-03 | 孙旭峰 | Spring separator |
| CN2752749Y (en) * | 2004-11-29 | 2006-01-18 | 许晓华 | Spring tester |
| CN201138275Y (en) * | 2007-12-27 | 2008-10-22 | 石家庄南车铁龙机电有限公司 | Automatic test apparatus for microcomputer controlled spring |
| CN201331422Y (en) * | 2009-01-22 | 2009-10-21 | 安徽蓝德集团股份有限公司 | Hydraulic spring fatigue-testing machine |
-
2012
- 2012-08-06 CN CN201210277591.8A patent/CN102809471B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035474U (en) * | 1988-01-26 | 1989-04-05 | 国家机械委武汉计算机外部设备研究所 | Separator for spring |
| SU1727012A1 (en) * | 1989-10-06 | 1992-04-15 | Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт электровозостроения | Device for determining rigidity parameters of helical compression springs |
| CN2484553Y (en) * | 2001-06-29 | 2002-04-03 | 孙旭峰 | Spring separator |
| CN2752749Y (en) * | 2004-11-29 | 2006-01-18 | 许晓华 | Spring tester |
| CN201138275Y (en) * | 2007-12-27 | 2008-10-22 | 石家庄南车铁龙机电有限公司 | Automatic test apparatus for microcomputer controlled spring |
| CN201331422Y (en) * | 2009-01-22 | 2009-10-21 | 安徽蓝德集团股份有限公司 | Hydraulic spring fatigue-testing machine |
Non-Patent Citations (2)
| Title |
|---|
| "智能化弹簧高度在线检测及自动分选系统";徐树兴 等;《电测与仪表》;19920301(第2期);第15-17页 * |
| 徐树兴 等."智能化弹簧高度在线检测及自动分选系统".《电测与仪表》.1992,(第2期),第15-17页. * |
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| CN102809471A (en) | 2012-12-05 |
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