CN210565405U - Horizontal band sawing machine hydraulic system - Google Patents
Horizontal band sawing machine hydraulic system Download PDFInfo
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- CN210565405U CN210565405U CN201921030416.2U CN201921030416U CN210565405U CN 210565405 U CN210565405 U CN 210565405U CN 201921030416 U CN201921030416 U CN 201921030416U CN 210565405 U CN210565405 U CN 210565405U
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Abstract
The utility model discloses a hydraulic system of a horizontal band sawing machine, which comprises an oil tank; and a change-over valve is arranged in parallel on the speed regulating valve on the pipeline between the oil port a2 of the three-position four-way electromagnetic valve and the rodless cavity of the lifting oil cylinder. The advantages are that: during batch processing, firstly, adjusting a speed regulating valve according to the required cutting feed speed; the operating handle is abutted against the first limiting pin, the change-over valve is opened, and the hydraulic oil is communicated with the lifting oil cylinder through the change-over valve, so that quick tool setting is realized; when the saw frame rapidly runs to a reserved cutting feed position, the operating handle is switched to a position abutting against the second limiting pin, the switching valve is closed, the switching time is less than 0.5 second, and the saw frame finishes cutting a workpiece at a preset cutting speed; therefore, the quick switching between quick tool setting and slow cutting feeding can be realized through the change-over valve, the machining efficiency is improved, the situation that the saw blade collides against a workpiece is avoided, meanwhile, the frequent operation of the speed regulating valve is avoided, and the service life of the speed regulating valve is prolonged.
Description
The technical field is as follows:
the utility model relates to a horizontal band sawing machine equipment technical field, in particular to horizontal band sawing machine hydraulic system.
Background art:
in the machining industry, a sawing machine is widely used as blank blanking equipment, and the rapid tool setting feeding action and the slow cutting feeding action of the sawing machine usually adopt a hydraulic driving mode; at present, the quick tool setting feeding and the slow cutting feeding of a used horizontal band sawing machine are controlled by adopting the same speed regulating valve which is a spiral stepless speed regulating valve, the rotating angle of a handle of the speed regulating valve is 0-1080 degrees (three circles), and the flow of hydraulic oil is changed by changing the clearance between a valve core and a valve body, so that the feeding speed regulating function is realized; the operation mode of converting the quick tool setting feed of the horizontal band sawing machine into the slow cutting feed is as follows: when the cutter is rapidly adjusted to feed, the speed regulating valve is rotated to the maximum (1080 ℃) position (the flow is maximum), the saw frame fixed with the saw blades can rapidly descend by pressing the feed button, when the saw blades rapidly reach a workpiece (a certain cutting feed distance is reserved), the speed regulating valve is immediately rotated to the minimum position (0 ℃), then the flow of the speed regulating valve is slowly increased, and the cutting feed speed is adjusted from low to high; in the operation process, the time for controlling the handle of the speed regulating valve to rotate from the maximum rotation angle to the minimum rotation angle needs to be more than 3 seconds, and in the period of time, due to the pressure transmission characteristic of hydraulic oil of a hydraulic system, the descending speed of the saw frame cannot be immediately reduced and can only be gradually reduced from fast to slow, so that if the distance between the reserved saw blade and the workpiece is short during fast feeding and tool setting, the phenomenon that the saw blade collides with the workpiece is easy to occur, the saw blade is damaged, even personal injury and equipment accidents are caused, and if the reserved distance is long, the cutting feeding time is prolonged, and the production efficiency is reduced; in addition, when each workpiece is machined, the speed regulating valve needs to be regulated according to the operation mode to realize conversion from quick tool setting feeding to slow cutting feeding, and therefore frequent operation easily causes the failure of the speed regulating valve to influence normal machining.
The utility model has the following contents:
an object of the utility model is to provide an effectively avoid equipment accident and improve production efficiency's horizontal band sawing machine hydraulic system.
The utility model discloses by following technical scheme implement: the horizontal band sawing machine hydraulic system comprises an oil tank, a blade variable pump, a lifting oil cylinder, a clamping oil cylinder, a three-position four-way electromagnetic valve and a two-position four-way electromagnetic valve; an oil inlet of the vane variable pump is communicated with the oil tank, an oil outlet of the vane variable pump is respectively communicated with an oil port a1 of the three-position four-way solenoid valve and an oil port b1 of the two-position four-way solenoid valve through pipelines, an oil port a2 of the three-position four-way solenoid valve is communicated with a rodless cavity of the lifting oil cylinder through a speed regulating valve, a rod cavity of the lifting oil cylinder is communicated with an oil port a3 of the three-position four-way solenoid valve, and an oil port a4 of the three-position four-way solenoid valve is communicated with the oil tank; an oil port b2 of the two-position four-way solenoid valve is communicated with a rodless cavity of the clamping oil cylinder, a rod cavity of the clamping oil cylinder is communicated with an oil port b3 of the two-position four-way solenoid valve, and an oil port b4 of the two-position four-way solenoid valve is communicated with the oil tank; and a switching valve and a one-way valve are arranged on a pipeline between the oil port a2 of the three-position four-way electromagnetic valve and the rodless cavity of the lifting oil cylinder in parallel connection with the speed regulating valve.
Further, a pressure gauge is arranged on a pipeline between an oil outlet of the vane variable pump and the b1 of the two-position four-way electromagnetic valve.
Further, the switching valve comprises a closed valve body and a valve core which is rotatably arranged in the valve body; the outer wall of the valve core is abutted against the inner wall of the valve body, one end of the valve core is rotatably connected with the valve body, and the other end of the valve core passes through the valve body in a sealing manner and is fixed with an operating handle; an oil inlet hole is formed in the outer wall of one end of the valve core in the valve body, an oil outlet hole is formed in the outer wall of the other end of the valve core in the valve body, and an oil passing channel communicated with the oil inlet hole and the oil outlet hole is formed in the valve core; an annular oil inlet groove communicated with the oil inlet hole is formed in the outer wall of the valve core along the circumferential direction, an oil inlet communicated with the oil inlet groove is formed in the valve body, and an oil outlet is formed in the valve body; the valve body is close to the outer wall of operating handle is fixed with first spacer pin and second spacer pin, operating handle with first spacer pin with the alternate movable contact of second spacer pin, when operating handle with first spacer pin contact, the oil drain port with the oil outlet intercommunication.
Furthermore, the outer wall of the valve core is circumferentially provided with a triangular groove, the bottom end of the triangular groove is communicated with the oil outlet, and the top point of the triangular groove extends in the direction that the operating handle turns to the first limiting pin.
The utility model has the advantages that: during batch processing, firstly, adjusting a speed regulating valve according to the required cutting feed speed; the operating handle is abutted against the first limiting pin, the change-over valve is opened, the flow of hydraulic oil passing through the change-over valve is maximum, and the hydraulic oil is communicated with the lifting oil cylinder through the change-over valve to realize rapid tool setting; when the saw frame rapidly runs to a reserved cutting feed position, the operating handle is switched to a position abutting against the second limiting pin, the change-over valve is closed, the switching time is less than 0.5 second, at the moment, the hydraulic oil can be communicated with the lifting oil cylinder through the speed regulating valve, and the saw frame finishes cutting a workpiece at a preset cutting speed; therefore, the quick switching between quick tool setting and slow cutting feeding can be realized through the change-over valve, the machining efficiency is improved, the situation that the saw blade collides against a workpiece is avoided, meanwhile, the frequent operation of the speed regulating valve is avoided, and the service life of the speed regulating valve is prolonged.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the switch valve.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic view of the valve body of the switch valve.
3 fig. 3 5 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 4 3. 3
The parts in the drawings are numbered as follows: the variable-displacement hydraulic control valve comprises an oil tank 1, a vane variable pump 2, a lifting oil cylinder 3, a clamping oil cylinder 4, a three-position four-way electromagnetic valve 5, a two-position four-way electromagnetic valve 6, a speed regulating valve 7, a change-over valve 8, a pressure gauge 9, a valve body 10, a valve core 11, an operating handle 12, an oil inlet hole 13, an oil outlet hole 14, an oil passing channel 15, an oil inlet groove 16, an oil inlet 17, an oil outlet 18, a first limit pin 19, a second limit pin 20, a triangular groove 21 and a one-way valve 22.
The specific implementation mode is as follows:
as shown in fig. 1 to 5, the horizontal band sawing machine hydraulic system includes an oil tank 1, a vane variable pump 2, a lift cylinder 3, a clamping cylinder 4, a three-position four-way solenoid valve 5, and a two-position four-way solenoid valve 6; the sawing machine is GB4040 in model, an oil inlet of a blade variable pump 2 is communicated with an oil tank 1, an oil outlet of the blade variable pump 2 is respectively communicated with an oil port a1 of a three-position four-way electromagnetic valve 5 and an oil port b1 of a two-position four-way electromagnetic valve 6 through pipelines, an oil port a2 of the three-position four-way electromagnetic valve 5 is communicated with a rodless cavity of a lifting oil cylinder 3 through a speed regulating valve 7, a rod cavity of the lifting oil cylinder 3 is communicated with an oil port a3 of the three-position four-way electromagnetic valve 5, and an oil port a4 of the three-position four-way electromagnetic; the lifting oil cylinder 3 can be lifted or lowered by switching the three-position four-way electromagnetic valve 5, so that the saw frame is driven to lift or lower, the speed of lowering the saw frame can be adjusted by the speed adjusting valve 7, and switching between fast feed and slow cutting feed is realized.
An oil port b2 of the two-position four-way electromagnetic valve 6 is communicated with a rodless cavity of the clamping oil cylinder 4, a rod cavity of the clamping oil cylinder 4 is communicated with an oil port b3 of the two-position four-way electromagnetic valve 6, and an oil port b4 of the two-position four-way electromagnetic valve 6 is communicated with the oil tank 1; the clamping oil cylinder 4 can be stretched by switching the two-position four-way electromagnetic valve 6, so that the workpiece can be clamped or loosened.
when a saw frame needs to be quickly lifted, hydraulic oil enters the saw frame lifting oil cylinder 3 through the one-way valve 22 to drive the saw frame to ascend, the change-over valve 8 comprises a sealed valve body 10 and a valve core 11 which is rotatably arranged in the valve body 10, the outer wall of the valve core 11 is abutted against the inner wall of the valve body 10, one end of the valve core 11 is rotatably connected with the valve body 10, the other end of the valve core 11 hermetically penetrates through the valve body 10 and is fixedly provided with an operating handle 12, the outer wall of one end of the valve core 11 in the valve body 10 is provided with an oil inlet 13, the outer wall of the other end of the valve core 11 in the valve body 10 is provided with an oil outlet 14, an oil passing channel 15 which is communicated with the oil inlet 13 is arranged in the valve core 11 along the circumferential direction, an annular oil inlet 16 which is communicated with the oil inlet 16, the valve body 10 is provided with an oil outlet 18, the outer wall of the valve body 10 which is fixedly provided with a first gear position pin 19 and a second gear position which is communicated with a gear position of a gear shifting handle 20, when the change-over hydraulic oil cylinder 7 is operated, the gear handle, the oil-over hydraulic oil-over hydraulic oil-over hydraulic oil cylinder 7, the gear lever 7, the oil-over hydraulic oil-over hydraulic oil-over hydraulic oil-over-hydraulic oil-over-under-hydraulic-over-hydraulic-over hydraulic-over-hydraulic.
A pressure gauge 9 is arranged on a pipeline between an oil outlet of the vane variable pump 2 and the b1 of the two-position four-way electromagnetic valve 6, and the clamping state of the clamping oil cylinder 4 on the workpiece can be observed through the pressure gauge 9.
Instructions for use: before the saw machine is started, the switching valve 8 is in a closed state, namely, the operating handle 12 is abutted against the second limit pin 20, and the triangular groove 21 is in a closed state relative to the oil drain port 18 of the valve body 10.
1) The cutting feed speed of the speed regulating valve 7 is regulated; starting the sawing machine, electrifying the YV2 coil of the two-position four-way electromagnetic valve 6, switching the two-position four-way electromagnetic valve 6 to the left position, driving the clamp by the clamping oil cylinder 4 to clamp the workpiece, electrifying the YV4 coil on the three-position four-way electromagnetic valve 5, switching the three-position four-way electromagnetic valve 5 to the right position, switching on to enable the saw frame to descend a hydraulic circuit, enabling the saw frame to run downwards, adjusting the speed regulating valve 7 to enable the running speed of the saw frame to be the required cutting feeding speed, and driving the saw frame to start to feed downwards from the highest point at a low speed by the saw frame lifting oil cylinder 3 under the control of the speed regulating valve 7.
2) Quickly setting a tool; the change-over valve 8 is switched to an open state, the operating handle 12 is abutted to the first limit pin 19, the oil outlet 14 is communicated with the oil outlet 18, meanwhile, the triangular groove 21 is in a maximum flow state relative to the oil outlet 18 of the valve body 10, hydraulic oil with the maximum flow enters a hydraulic loop enabling the saw frame to descend through the change-over valve 8, and the saw frame lifting oil cylinder 3 drives the saw frame to quickly descend for tool setting.
3) Slow cutting feed; when the saw frame rapidly descends to a reserved cutting feed position, the change-over valve 8 is immediately switched to a 'closed' state, the operating handle 12 is abutted to the second limiting pin 20, the hydraulic oil channel with the maximum flow through the change-over valve 8 is immediately cut off, the saw frame immediately stops rapid descending, at the moment, hydraulic oil enters a saw frame descending hydraulic circuit through the speed regulating valve 7 which is adjusted in advance in the step 1), the saw frame lifting oil cylinder 3 drives the saw frame to start slow descending, and slow cutting feed motion is performed on a workpiece, so that cutting processing is performed on the workpiece.
4) After cutting is finished, the saw frame descends to the lowest point, a lower limit travel switch arranged on the sawing machine is triggered, a YV4 coil circuit on the three-position four-way electromagnetic valve 5 is cut off, meanwhile, a YV3 coil on the three-position four-way electromagnetic valve 5 is electrified, the three-position four-way electromagnetic valve 5 is switched to the left position, a saw frame ascending hydraulic loop is switched on, hydraulic oil enters the saw frame lifting oil cylinder 3 through a check valve 22 connected with the speed regulating valve 7 in parallel, the lifting oil cylinder 3 drives the saw frame to be quickly lifted, when the saw frame ascends to the highest point, an upper limit travel switch on the sawing machine is triggered, power supply of the three-position four-way electromagnetic valve 5 is cut off, the three-position four-way electromagnetic valve 5 returns to the middle; then, a YV1 coil of the two-position four-way electromagnetic valve 6 is electrified, the two-position four-way electromagnetic valve 6 is switched to the right position, and the clamping oil cylinder 4 drives the clamp to loosen the machined workpiece.
When the subsequent workpieces needing mass production are processed, the cutting feed speed of the speed regulating valve 7 in the step 1) does not need to be regulated, and the mass production can be quickly realized by only repeatedly carrying out the steps 2), 3) and 4).
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The horizontal band sawing machine hydraulic system is characterized by comprising an oil tank, a blade variable pump, a lifting oil cylinder, a clamping oil cylinder, a three-position four-way electromagnetic valve and a two-position four-way electromagnetic valve; an oil inlet of the vane variable pump is communicated with the oil tank, an oil outlet of the vane variable pump is respectively communicated with an oil port a1 of the three-position four-way solenoid valve and an oil port b1 of the two-position four-way solenoid valve through pipelines, an oil port a2 of the three-position four-way solenoid valve is communicated with a rodless cavity of the lifting oil cylinder through a speed regulating valve, a rod cavity of the lifting oil cylinder is communicated with an oil port a3 of the three-position four-way solenoid valve, and an oil port a4 of the three-position four-way solenoid valve is communicated with the oil tank; an oil port b2 of the two-position four-way solenoid valve is communicated with a rodless cavity of the clamping oil cylinder, a rod cavity of the clamping oil cylinder is communicated with an oil port b3 of the two-position four-way solenoid valve, and an oil port b4 of the two-position four-way solenoid valve is communicated with the oil tank; and a switching valve and a one-way valve are arranged on a pipeline between the oil port a2 of the three-position four-way electromagnetic valve and the rodless cavity of the lifting oil cylinder in parallel connection with the speed regulating valve.
2. The horizontal band sawing machine hydraulic system according to claim 1, wherein a pressure gauge is arranged on a pipeline between an oil outlet of the blade variable pump and b1 of the two-position four-way solenoid valve.
3. The horizontal band sawing machine hydraulic system according to any one of claims 1 or 2, wherein the switching valve comprises a closed valve body and a valve core rotatably arranged in the valve body; the outer wall of the valve core is abutted against the inner wall of the valve body, one end of the valve core is rotatably connected with the valve body, and the other end of the valve core passes through the valve body in a sealing manner and is fixed with an operating handle; an oil inlet hole is formed in the outer wall of one end of the valve core in the valve body, an oil outlet hole is formed in the outer wall of the other end of the valve core in the valve body, and an oil passing channel communicated with the oil inlet hole and the oil outlet hole is formed in the valve core; an annular oil inlet groove communicated with the oil inlet hole is formed in the outer wall of the valve core along the circumferential direction, an oil inlet communicated with the oil inlet groove is formed in the valve body, and an oil outlet is formed in the valve body; the valve body is close to the outer wall of operating handle is fixed with first spacer pin and second spacer pin, operating handle with first spacer pin with the alternate movable contact of second spacer pin, when operating handle with first spacer pin contact, the oil drain port with the oil outlet intercommunication.
4. The horizontal band sawing machine hydraulic system according to claim 3, wherein a triangular groove is formed in the outer wall of the valve core along the circumferential direction, the bottom end of the triangular groove is communicated with the oil outlet hole, and the top point of the triangular groove extends in the direction that the operating handle turns to the first limiting pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921030416.2U CN210565405U (en) | 2019-07-03 | 2019-07-03 | Horizontal band sawing machine hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921030416.2U CN210565405U (en) | 2019-07-03 | 2019-07-03 | Horizontal band sawing machine hydraulic system |
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| CN210565405U true CN210565405U (en) | 2020-05-19 |
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| CN201921030416.2U Active CN210565405U (en) | 2019-07-03 | 2019-07-03 | Horizontal band sawing machine hydraulic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709719A (en) * | 2021-01-04 | 2021-04-27 | 黑龙江省农业机械工程科学研究院 | Hydraulic propulsion system of spreading machine |
| CN114619099A (en) * | 2021-06-09 | 2022-06-14 | 浙江威力士机械有限公司 | Speed-variable band sawing machine |
-
2019
- 2019-07-03 CN CN201921030416.2U patent/CN210565405U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709719A (en) * | 2021-01-04 | 2021-04-27 | 黑龙江省农业机械工程科学研究院 | Hydraulic propulsion system of spreading machine |
| CN114619099A (en) * | 2021-06-09 | 2022-06-14 | 浙江威力士机械有限公司 | Speed-variable band sawing machine |
| CN114619099B (en) * | 2021-06-09 | 2023-09-05 | 浙江威力士机械有限公司 | Variable-speed band sawing machine |
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