CN202356977U - Counterweight device for variable-load broaching machines - Google Patents
Counterweight device for variable-load broaching machines Download PDFInfo
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- CN202356977U CN202356977U CN201120501438XU CN201120501438U CN202356977U CN 202356977 U CN202356977 U CN 202356977U CN 201120501438X U CN201120501438X U CN 201120501438XU CN 201120501438 U CN201120501438 U CN 201120501438U CN 202356977 U CN202356977 U CN 202356977U
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- servo valve
- digital signal
- signal processor
- electrical servo
- counterweight cylinder
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- 239000003990 capacitor Substances 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The utility model discloses a counterweight device for variable-load broaching machines, which comprises a servo motor, a counterweight cylinder, a digital signal processor and electrical servo valves, wherein the servo motor drives a workbench for broaching machines by a lead screw, the counterweight cylinder is connected with the workbench for broaching machines by a connecting rod, air sources are connected with the electrical servo valves, the servo motor is connected with the digital signal processor by an ammeter, the digital signal processor is connected with the electrical servo valves, voltage signals output by the digital signal processor control the openness of the electrical servo valves, the electrical servo valves are connected with the counterweight cylinder, and a synchronizing mechanism is arranged between the servo motor and the counterweight cylinder. The counterweight device disclosed by the utility model has the advantages that a mode of continuously monitoring the current fluctuations in the servo motor is adopted, when a situation that the current of the servo motor has a step is detected, the thrust of the counterweight cylinder is timely adjusted by using a pneumatic counterweight device so as to balance the load fluctuations caused by tension changes, thereby suppressing the vibration in the process of machining.
Description
Technical field
The utility model relates to a kind of broaching machine counter weight device, relates in particular to a kind of varying load broaching machine counter weight device.
Background technology
Broaching machine is a lathe of processing molded surface inside and outside the various workpiece with broaching tool.When the broaching machine work of servo-drive, servomotor drives the broaching machine working table movement through the roller screw mandrel, and the broaching machine workbench moves as vertical line along the broaching machine column.Under the Light Condition, because of workbench gravity relation, the broaching machine workbench is when rise and fall, and the required driving force size of motor is inequality, in process of rising or falling, has identical driving force in order to make motor, adopts the counterweight method usually.Traditional counterweight method adopts counter weight or hydraulic counterweight system, has just solved basic driving force problem.But broaching machine is when work; Because the characteristics of broaching tool structure; The different teeth position turnover of broaching tool, cutting force can produce step, big or small cyclically-varying, and this can aggravate the vibration and the flutter of lathe; So not only the product processed quality is produced very big influence, and also a lot of to the lathe and the influence in pulling force life-span.Therefore how to reduce cutting load effectively and change the vibration that causes, apparent is even more important.
Summary of the invention
The utility model technical problem to be solved provides a kind of cutting load that can effectively reduce and changes the varying load broaching machine counter weight device that causes vibration.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of varying load broaching machine counter weight device; It is characterized in that comprising the counterweight cylinder, digital signal processor, the first electrical servo valve and the second electrical servo valve that drive the servomotor of broaching machine workbench, be connected with the broaching machine workbench through connecting rod through leading screw; First source of the gas is connected with the first electrical servo valve; Second source of the gas is connected with the described second electrical servo valve; Servomotor is connected with digital signal processor through ammeter; Digital signal processor is connected with the second electrical servo valve with the first electrical servo valve respectively, and the digital signal processor output voltage signal is controlled the opening degree of the first electrical servo valve and the second electrical servo valve, and the first electrical servo valve is connected with described counterweight cylinder air inlet; The second electrical servo valve is connected with the exhaust outlet of described counterweight cylinder, between described servomotor and the counterweight cylinder lazy-tongs is set.
Described lazy-tongs comprise motor encoder and velocity sensor; Servomotor is connected with digital signal processor through described motor encoder; Digital signal processor detects servomotor through motor encoder and drives broaching machine workbench rising or falling speed, and digital signal processor detects counterweight air cylinder driven bar movement velocity through velocity sensor.
Digital signal processor is connected with the air inlet of counterweight cylinder through first pressure sensor; Digital signal processor detects the air inlet pressure of counterweight cylinder through first pressure sensor; Digital signal processor is connected with the exhaust outlet of counterweight cylinder through second pressure sensor, and digital signal processor detects the exhaust port pressure of counterweight cylinder through second pressure sensor.
Be provided with air-capacitor between the air inlet of the output of the described first electrical servo valve and counterweight cylinder, described air-capacitor is between the exhaust outlet of the output of the second electrical servo valve and counterweight cylinder.
Be provided with first filter between first source of the gas and the first electrical servo valve, be provided with second filter between second source of the gas and the second electrical servo valve.Being provided with of filter keeps the gas of electrical servo valve pure.
Compared with prior art; The utility model has the advantages that the fluctuation situation that adopts electric current in the uninterrupted monitoring servomotor; When detected servomotor electric current generation step; Utilize Pneumatic weight counterbalancing apparatus in time to adjust the size of counterweight cylinder thrust, with balance because the fluctuation of load that causes of tension variations suppresses the vibration in the process.
Digital signal processor changes through the current step that ammeter detects servomotor; When the current step of servomotor surpassed the current value of setting, the digital signal processor output voltage signal was given the electrical servo valve, the opening degree of control electrical servo valve; Regulate the pressure of counterweight cylinder; Change the thrust size and the counterweight air cylinder driven bar movement velocity of counterweight cylinder, because the broaching tool cutting force changes the fluctuation of load that causes, suppress the vibration and the flutter of lathe in the process with balance; Guarantee the product processed quality, prolong the service life of lathe and broaching tool.It is identical with counterweight air cylinder driven bar movement velocity that lazy-tongs guarantee that servomotor drives broaching machine workbench rising or falling speed, just can make the effect of balance weight mechanism performance counterweight.
Between servomotor and the counterweight cylinder lazy-tongs are set, digital signal processor detects servomotor through motor encoder and drives broaching machine workbench rising or falling speed, and digital signal processor detects counterweight air cylinder driven bar movement velocity through velocity sensor.Through digital signal processor respectively output voltage signal give the first electrical servo valve and the second electrical servo valve to control the opening degree of the first electrical servo valve and the second electrical servo valve; Regulate the air inlet of counterweight cylinder and the pressure of exhaust outlet, servomotor drive broaching machine workbench rising or falling speed and counterweight air cylinder driven bar movement velocity are kept synchronously.
Pressure sensor can detect the input air pressure pressure of counterweight cylinder in real time, and when the opening degree of electrical servo valve was regulated, air-capacitor played the effect of buffering, avoids the excessive vibration that causes of air pressure change at short notice of counterweight cylinder.
Be more effective adjustment and control counterweight cylinder release power and cylinder moving response; The counterweight cylinder air inlet is connected electrical servo valve and air filter respectively with exhaust outlet; The load port of counterweight cylinder is independently controlled, had two control frees degree, in accelerator; Aperture through strengthening the exhaust outlet air valve is to guarantee its rapidity; In counter weight device deceleration or braking procedure, avoid compression shock and vibration through the pressure of independent control counterweight cylinder exhaust port, improve the stationarity of load-retarding and braking procedure.Can control simultaneously the track of counterweight cylinder moving track and controlled pressure more accurately, better control the vibration that the sudden change of varying load broaching machine cutting force causes.
Description of drawings
Fig. 1 is the structured flowchart of the counter weight device of the utility model.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
A kind of varying load broaching machine counter weight device; Comprise the counterweight cylinder 5, digital signal processor 6, the first electrical servo valve 7 and the second electrical servo valve 8 that drive the servomotor 3 of broaching machine workbench 2, be connected with broaching machine workbench 2 through connecting rod 4 through leading screw 1; First source of the gas 9 is connected with the first electrical servo valve 7; Second source of the gas 10 is connected with the second electrical servo valve 8; Servomotor 3 is connected with digital signal processor 6 through ammeter 11; Digital signal processor 6 is connected with the second electrical servo valve 8 with the first electrical servo valve 7 respectively, and digital signal processor 6 output voltage signal U control the opening degree of the first electrical servo valve 7 and the second electrical servo valve 8, and the first electrical servo valve 7 is connected with counterweight cylinder 5 air inlets 51; The second electrical servo valve 8 is connected with the exhaust outlet 52 of counterweight cylinder 5, between servomotor 3 and the counterweight cylinder 5 lazy-tongs is set.Broaching machine workbench 2 moves both vertically along broaching machine column 11, and broaching tool 12 is vertically set on the broaching machine workbench 2.
Lazy-tongs comprise motor encoder 13 and velocity sensor 14; Servomotor 3 is connected with digital signal processor 6 through motor encoder 13; Digital signal processor 6 detects servomotor 3 through motor encoder 13 and drives broaching machine workbench 2 rising or falling speeds, and digital signal processor 6 detects counterweight cylinder 5 drive rod movement velocitys through velocity sensor 14.
Be provided with air-capacitor 17 between the air inlet 51 of the output of the first electrical servo valve 7 and counterweight cylinder 5, air-capacitor 17 is between the exhaust outlet 52 of the output of the second electrical servo valve 8 and counterweight cylinder 5.
Be provided with between first filter, 17, the second sources of the gas 10 and the second electrical servo valve 8 between first source of the gas 9 and the first electrical servo valve 7 and be provided with second filter 18.
Claims (5)
1. varying load broaching machine counter weight device; It is characterized in that comprising the counterweight cylinder, digital signal processor, the first electrical servo valve and the second electrical servo valve that drive the servomotor of broaching machine workbench, be connected with the broaching machine workbench through connecting rod through leading screw; First source of the gas is connected with the first electrical servo valve; Second source of the gas is connected with the described second electrical servo valve; Servomotor is connected with digital signal processor through ammeter; Digital signal processor is connected with the second electrical servo valve with the first electrical servo valve respectively, and the digital signal processor output voltage signal is controlled the opening degree of the first electrical servo valve and the second electrical servo valve, and the first electrical servo valve is connected with described counterweight cylinder air inlet; The second electrical servo valve is connected with the exhaust outlet of described counterweight cylinder, between described servomotor and the counterweight cylinder lazy-tongs is set.
2. a kind of varying load broaching machine counter weight device according to claim 1; It is characterized in that described lazy-tongs comprise motor encoder and velocity sensor; Servomotor is connected with digital signal processor through described motor encoder; Digital signal processor detects servomotor through motor encoder and drives broaching machine workbench rising or falling speed, and digital signal processor detects counterweight air cylinder driven bar movement velocity through velocity sensor.
3. a kind of varying load broaching machine counter weight device according to claim 2; It is characterized in that digital signal processor passes through first pressure sensor and is connected with the air inlet of counterweight cylinder; Digital signal processor detects the air inlet pressure of counterweight cylinder through first pressure sensor; Digital signal processor is connected with the exhaust outlet of counterweight cylinder through second pressure sensor, and digital signal processor detects the exhaust port pressure of counterweight cylinder through second pressure sensor.
4. a kind of varying load broaching machine counter weight device according to claim 3; It is characterized in that being provided with air-capacitor between the air inlet of output and counterweight cylinder of the described first electrical servo valve, described air-capacitor is between the exhaust outlet of the output of the second electrical servo valve and counterweight cylinder.
5. a kind of varying load broaching machine counter weight device according to claim 4 is characterized in that being provided with first filter between first source of the gas and the first electrical servo valve, is provided with second filter between second source of the gas and the second electrical servo valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120501438XU CN202356977U (en) | 2011-12-06 | 2011-12-06 | Counterweight device for variable-load broaching machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120501438XU CN202356977U (en) | 2011-12-06 | 2011-12-06 | Counterweight device for variable-load broaching machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202356977U true CN202356977U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120501438XU Expired - Fee Related CN202356977U (en) | 2011-12-06 | 2011-12-06 | Counterweight device for variable-load broaching machines |
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| Country | Link |
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| CN (1) | CN202356977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554686A (en) * | 2011-12-06 | 2012-07-11 | 浙江纺织服装职业技术学院 | Variable-load broacher counterweight system and control method |
-
2011
- 2011-12-06 CN CN201120501438XU patent/CN202356977U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554686A (en) * | 2011-12-06 | 2012-07-11 | 浙江纺织服装职业技术学院 | Variable-load broacher counterweight system and control method |
| CN102554686B (en) * | 2011-12-06 | 2015-05-20 | 浙江纺织服装职业技术学院 | Variable-load broacher counterweight and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20131206 |