Two-way hydraulic valve for machine tool cutter stroke control

Abstract

A two-way hydraulic valve for machine tool cutter stroke control comprises a valve body and a valve element mechanism. A detection control circuit is also provided; guide grooves are formed in the upper end and the lower end in the valve body, an oil inlet and outlet groove is formed between the two guide grooves, an oil outlet pipe is arranged at the rear side end of the valve body, the valve element mechanism comprises an electric push rod, a valve rod, a valve element, a spring, a guide block and a pressure sensor, one side end of the valve element and one side end of the valve rod are installed together, and one side end of the guide block and the other side end of the valve rod are installed together. A push column of the electric push rod and the other side of the guide block are mounted together; the pressure sensor is installed at one end of the inner side of the valve body guide groove, the spring, the valve element and the guide block are movably sleeved with the guide groove, and the side end of the electric push rod cylinder is externally installed at one end of the outer side of the guide groove. And the detection control circuit is arranged in the element box. The tool base can be pushed to move at a high speed, the movement stroke of the tool base can be accurately adjusted, the better tool stroke control effect is achieved, and powerful technical support is provided for stable and reliable work of a machine tool.

Description

Technical Field

[0001] The utility model relates to the field of machine tool auxiliary equipment, in particular to a dual-way hydraulic valve used for machine tool tool stroke control. Background Art

[0002] In modern manufacturing, the development of precision machining technology plays a vital role in improving product quality, machining efficiency and production automation. The stroke control of machine tool tools is a key link in the machining process, which directly affects the machining accuracy and production efficiency. When the distance between the tool and the workpiece is too large, the machining depth of the workpiece will be too large (even the tool will be damaged). On the contrary, when the distance between the tool and the workpiece is too small, the machining depth of the workpiece will be too small. Both of the above methods will lead to the inability to guarantee the quality of workpiece machining. In the prior art, the feed stroke of large tools is generally controlled by a hydraulic feed mechanism. The hydraulic feed mechanism mainly includes a hydraulic control valve, a cylinder, a piston rod, and a connecting seat. When working, the hydraulic oil pumped out by the oil pump enters the hydraulic control valves at both ends of the cylinder barrel of the cylinder through the hydraulic control valve, and then enters one end or the other end of the cylinder barrel of the cylinder through the hydraulic control valves on both sides. The piston rod then drives the connecting seat to drive the tool seat matching the tool to move horizontally and to the corresponding side, and the tool approaches the workstation where the workpiece needs to be processed (when the hydraulic oil on both sides of the piston rod in the cylinder barrel of the cylinder moves to one side, the hydraulic oil in the cylinder barrel corresponding to one side of the piston rod flows back into the return pipe of the hydraulic oil pump through the return oil solenoid valve on the corresponding side of the cylinder barrel (the power switch of the solenoid valve is turned on), thereby achieving the effect of hydraulic oil circulation). Specifically, the staff manually adjusts the valve stem of the hydraulic control valve in a clockwise or counterclockwise direction according to specific control needs, so that the corresponding opening and closing degree of the valve core changes slightly or greatly. After entering the corresponding side of the cylinder barrel of the cylinder through the pipeline, the piston rod is pushed to move to the appropriate position with a short stroke or a long stroke (pushing the tool seat and the tool to move accordingly). After closing the valve core, the tool seat and the tool stop moving.

[0003] Although the existing hydraulic feed mechanism meets the control needs to a certain extent, it still has the following technical problems due to structural limitations. Since the valve core opening and closing size of the hydraulic control valve of the current hydraulic feed mechanism is manually controlled, manual manual rotation of the valve stem adjustment will bring inconvenience to the staff, and the flow of hydraulic oil cannot be accurately controlled. When the oil intake is too large, the tool will be fed too fast, and there is a probability of collision and damage between the tool blade and the workpiece or other workpieces on the machine tool. On the contrary, when the oil intake is too small, the tool will be fed too slowly, which will more or less affect the work efficiency. In fact, when the tool is far from the workpiece, the oil intake can be relatively large, and when the tool is close to the workpiece, the oil intake is reduced when the tool is close to the workpiece, or when the tool is close to the end point, it will not only improve the work efficiency, but also prevent the probability of collision and damage to the tool, etc., but manual control is inconvenient, so it is particularly necessary to provide a two-way hydraulic valve that can be conveniently controlled by the staff for power switch control and can select different hydraulic oil flows according to specific needs. Utility Model Content

[0004] In order to realize the hydraulic feed mechanism of machine tool application, the supporting hydraulic control valve has the disadvantages as mentioned in the background due to structural limitations. The utility model provides a dual-way hydraulic valve for tool stroke control of machine tools, which provides strong technical support for the stable and reliable operation of machine tools, so that the staff can conveniently control the hydraulic oil to enter the cylinder barrel of the oil cylinder at different flow rates under the joint action of relevant mechanisms, bringing convenience to the staff. Moreover, since it has two oil circuits, it can not only push the tool seat to move at a faster speed as required, but also adjust the stroke of the tool seat movement as accurately as possible to achieve better tool stroke control effect, thus providing strong technical support for the stable and reliable operation of machine tools.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] , The camshaft is connected to the valve body through the camshaft, and the camshaft is connected to the valve body through the camshaft. When the camshaft is connected, the camshaft is connected to the valve body through the camshaft. When the camshaft is connected, the camshaft is connected to the valve body through the camshaft. When the camshaft is connected, the camshaft is connected to the valve body through the camshaft. Push rod, valve stem, valve core, spring, guide block, pressure sensor, one side end of the valve core and one side end of the valve stem are installed together, one side end of the guide block and the other side end of the valve stem are installed together, and the push column side end of the electric push rod and the other side end of the guide block are installed together; the pressure sensors of the two sets of valve core mechanisms are respectively installed at one end of the inner side of the two guide grooves of the valve body, the springs, valve cores and guide blocks of the two sets of valve core mechanisms are respectively movably sleeved in the two guide grooves, and the outer side ends of the cylinder bodies of the electric push rods of the two sets of valve core mechanisms are respectively installed at one end of the outer side of the two guide grooves; the detection control circuit is installed in the component box, and the power output ends of the two sets of detection control circuits and the power input ends of the electric push rods of the two sets of valve cores are respectively electrically connected,

[0007] Furthermore, the inner diameter of the guide groove at the upper end of the valve body is larger than the inner diameter of the guide groove at the inner lower end, the outer diameter of the valve stem of the two sets of valve core mechanisms is smaller than the outer diameter of the valve core and the guide block, the outer diameters of the valve core and the guide block of the two sets of valve core mechanisms are respectively smaller than the inner diameters of the guide groove at the upper end and the inner lower end of the valve body, and the valve core, the guide block and the guide groove are in a sliding sealing contact structure.

[0008] Furthermore, the force-bearing surface of the pressure sensor contacts one side end of the spring.

[0009] Furthermore, each set of detection control circuits includes a first control sub-circuit and a second control sub-circuit. The first control sub-circuit and the second control sub-circuit have the same structure and both include electrically connected relays, adjustable resistors, resistors, and transistors. The positive power input terminal of the relay and the positive control power input terminal are connected, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the other end of the first resistor is connected to the emitter of the transistor and the negative control power input terminal of the relay, and the collector of the transistor is connected to the negative power input terminal of the relay.

[0010] Furthermore, the signal input terminals of the first control sub-circuit and the second control sub-circuit of each set of detection control circuit are electrically connected to the signal output terminals of each set of pressure sensors.

[0011] Compared with the prior art, the beneficial effect of the utility model is that under the joint action of the detection control circuit, valve body, valve core mechanism, etc., the staff can conveniently control the hydraulic oil to enter the cylinder barrel of the oil cylinder at different flow rates through the power switch, which brings convenience to the staff. The valve body has two oil circuits, which can not only push the tool holder to move at a faster speed as needed, but also adjust the stroke of the tool holder as accurately as possible to achieve a better tool stroke control effect (when the tool is far away from the workpiece, the oil intake can be relatively large, and when the tool is close to the workpiece, the oil intake can be reduced when the tool is close to the workpiece, or when the tool is close to the end point), which will not only improve work efficiency, but also prevent the probability of collision damage to the tool, etc.), and provide strong technical support for the stable and reliable operation of the machine tool. In summary, the new model has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0015] Figure 3 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 , 2, 3, a two-way hydraulic valve for machine tool tool stroke control, including a power switch S1, a power module A1, a valve body 1, a valve core mechanism 2; it also has a detection control circuit 3; the rectangular valve body has two horizontally distributed guide grooves 101 at the upper and lower ends of the middle part, and the left end of the guide groove 101 is a closed structure and the right end is an open structure, and the middle part of the two guide grooves 101 of the valve body has an inlet and outlet oil groove 102 that runs through from top to bottom, and the outer sides of the upper inlet and outlet oil groove 102 and the lower inlet and outlet oil groove 102 are respectively vertically An upper connecting pipe 103 and a lower connecting pipe 104 are welded, which are interconnected with the inlet and outlet oil tanks; the upper side of the upper connecting pipe 103 and the lower side of the lower connecting pipe 104 are respectively connected in parallel through pipelines and the outlet pipes of the hydraulic oil pump (not shown in the figure) through hydraulic oil pipes, and an outlet pipe 105 interconnected with the inlet and outlet oil tanks is longitudinally welded to the middle part of the rear end of the valve body, and the outlet pipe 105 is connected to one side end joint of the cylinder barrel of the hydraulic feed mechanism of the machine tool (not shown in the figure) through a hydraulic oil pipe; the valve core mechanism 2, the detection control circuit 3 respectively, each set of valve core mechanism 2 includes a small electric push rod M1, a valve stem 21, a valve core 22, a spring 23, a guide block 24, and a pressure sensor A. The middle of the right end of the valve core 22 is welded to the left end of the valve stem 21, the middle of the left end of the guide block 24 and the right end of the valve stem 21 are welded together, and the left end of the push column of the electric push rod M1 and the middle of the right end of the guide block 24 are welded together; the pressure sensors A of the two sets of valve core mechanisms (and the guide connected thereto) are projected outward through the middle opening of the left end of the guide groove 101 , the opening is sealed with sealant) and are respectively tightly mounted on the left inner end of the two guide grooves 101 of the valve body. The springs 23, valve cores 23 and guide blocks 24 of the two sets of valve core mechanisms are movably mounted in the two guide grooves 101 from left to right, and the right side of the spring 23 is in contact with the left side end of the valve core 22. The left side ends of the electric push rods M1 cylinders of the two sets of valve core mechanisms are respectively sealed and welded on the right outer ends of the two guide grooves 101; the power switch S1, power module A1 and detection control circuit 3 are mounted on the circuit board in the component box 4.

[0017] Figure 1 , 2As shown in 3, the inner diameter of the guide groove 101 at the inner upper end of the valve body is twice greater than the inner diameter of the guide groove 101 at the inner lower end, the outer diameter of the valve stem 21 of the two sets of valve core mechanisms is smaller than the outer diameter of the valve core 22 and the guide block 24, the outer diameters of the valve core 22 and the guide block 24 of the two sets of valve core mechanisms are respectively smaller than the inner diameter of the guide groove 101 in the valve body, and the valve core 22 and the guide block 24 are in a sliding sealing contact structure with the guide groove 101. The right side end force surface of the pressure sensor A contacts the left side end of the spring 23. The following content of the present invention is a representative description of the present invention through a first control subcircuit and a second control subcircuit of a detection control circuit. Each detection control circuit includes a first control subcircuit and a second control subcircuit. The first control subcircuit and the second control subcircuit have the same structure and both include a relay K (K1), an adjustable resistor RP (RP1), resistors R1 and R2 (R3 and R4), and a transistor Q (Q1) connected by circuit board wiring. The positive power input terminal of the relay K (K1) is connected to the positive control power input terminal, one end of the adjustable resistor RP (RP1) is connected to one end of the first resistor R1 (R3) and one end of the second resistor R2 (R4), the other end of the second resistor R2 (R4) is connected to the base of the transistor Q (Q1), the collector of the transistor Q (Q1) is connected to the negative power input terminal of the relay K (K1), the other end of the first resistor R1 (R3) is connected to the emitter of the transistor Q (Q1) and the negative control power input terminal of the relay K (K1), and the collector of the transistor Q (Q1) is connected to the negative power input terminal of the relay K (K1). The adjustable resistor RP (RP1) at the signal input end of the first control subcircuit and the second control subcircuit of the two detection control circuits and the signal output end 3 pins of the two pressure sensors A are connected via wires. The power input end 1 and 2 pins of the power module A1 are connected to the two poles of the AC 220V power supply via wires, the power output end 3 and 4 pins of the power module A1 are connected to the power input end 1 and 2 pins of the two power switches S1 via wires, the power output end 3, 4 pins and 5, 6 pins of the two power switches S1 are connected to the power input end relay K positive power input end and the transistor Q emitter of the two detection control circuits, the positive power input end of the relay K1 and the transistor Q1 emitter via wires, and the power output end relay K of the two detection control circuits, the two normally closed contact ends, the two normally open contact ends of the relay K1 and the positive and negative and negative and positive power input ends of the electric push rods M1 of the two valve cores are connected via wires. The 3rd and 5th pins of the power switch S1 are respectively connected to the positive electrodes of diodes VD1 and VD2 through wires, and the negative electrodes of diodes VD1 and VD2 (one-way conduction function) are connected to the positive power input terminal 1 pin of the pressure sensor A through wires.

[0018] Figure 1 , 2As shown in Figure 3, after the AC 220V power supply enters the power input terminal of the power module A1, the 3rd and 4th pins of the power module A1 output a stable DC 12V power supply to enter the power input terminal of the power switch S1. When the staff needs to control the upper connecting pipe 103 at the upper end of the valve body to provide hydraulic oil for the oil cylinder of the feed seat (one set of the new type is installed at each end of the oil cylinder, and two sets of the new type share one power module) with a relatively large flow, or needs to control the lower connecting pipe 104 at the lower end of the valve body to provide hydraulic oil for the oil cylinder of the feed seat with a relatively large flow, after the handle of the corresponding power switch S1 is turned to the left, the 1st and 2nd pins and the 3rd and 4th pins of the corresponding power switch S1 are connected respectively, so that the pressure sensor A at the upper or lower end of the valve body and the first control sub-circuit are powered on and work, and the staff pre-adjusts the resistance value of the adjustable resistor RP and sets the amount of relatively large flow hydraulic oil control. The 12V power supply enters the positive and negative power input terminals of an electric push rod M1 at the upper end or the lower end of the valve body through the two control power input terminals and two normally closed contact terminals of the relay K. The push column of the corresponding electric push rod M1 pushes the valve stem 21 to move to the left end, and then the valve core 22 gradually no longer closes the upper or lower end inlet and outlet oil groove 102. The hydraulic oil output by the hydraulic oil pump enters the valve body through the upper connecting pipe 102 or the lower connecting pipe 102, and then enters the corresponding end of the cylinder barrel of the oil cylinder from the oil outlet pipe 105. When a corresponding set of electric push rods M1 pushes the valve core 22 to move toward the left end along a corresponding guide groove 101 and the valve core gradually opens to the left, while the amount of hydraulic oil entering gradually increases, a corresponding valve core 22 will compress a corresponding spring 23 to the left. While the spring 23 is compressed, its left end will gradually apply a greater pressure to the force-bearing surface of a corresponding pressure sensor A. The 3rd pin of the corresponding pressure sensor A outputs a dynamically changing voltage signal that enters the other end of the corresponding first control sub-circuit adjustable resistor RP (the greater the valve core moves toward the left end, the larger the oil intake is, and the higher the voltage signal is, and vice versa). When the distance moved to the left by the corresponding valve core 22 does not reach the distance set by the adjustable resistor RP (that is, the set pressure and the set oil intake), the voltage signal output by the 3rd pin of the corresponding pressure sensor A is divided by the adjustable resistor RP and the resistor R1, and the resistor R2 reduces the voltage and limits the current, and the base voltage of the transistor Q is lower than 0.7V. The transistor Q will not be turned on, and the relay K will not be energized to close its control power input terminal and the normally closed contact terminal to continue to be closed. The corresponding set of electric push rods M1 continues to push the valve core to the left to open.When the distance that the corresponding valve core 22 moves to the left reaches the distance set by the adjustable resistor RP (that is, the set pressure and the set oil intake), the voltage signal output by the 3rd pin of the corresponding pressure sensor A is divided by the adjustable resistor RP and the resistor R1, and the resistor R2 reduces the voltage and limits the current to enter the base voltage of the transistor Q, which is higher than 0.7V. The transistor Q will turn on the collector to output a low level and enter the negative power input terminal of the relay K. The relay K will be energized to close its control power input terminal and the normally closed contact terminal to open the circuit. The corresponding set of electric push rods M1 will lose power and will no longer work and will no longer continue to push the valve core to the left. The corresponding valve core is at the set large flow rate to provide hydraulic oil to the cylinder.

[0019] Figure 1 , 2As shown in Figures 3 and 4, when the staff needs to control the upper connecting pipe 103 at the upper end of the valve body to provide hydraulic oil for the cylinder of the feed seat with a relatively small flow rate, or needs to control the lower connecting pipe 104 at the lower end of the valve body to provide hydraulic oil for the cylinder of the feed seat with a relatively small flow rate, after turning the handle of the corresponding power switch S1 to the right, the 1st and 2nd feet and the 5th and 6th feet of the corresponding power switch S1 are connected respectively, so that the pressure sensor A at the upper or lower end of the valve body and the second control sub-circuit are energized to work, and the staff pre-adjusts the resistance value of the adjustable resistor RP1 and sets the relatively small flow rate hydraulic oil control. The 12V power supply enters the negative and positive power input terminals of an electric push rod M1 at the upper end or the lower end of the valve body through the two control power input terminals and the two normally open contact terminals of the relay K1. The push column of the corresponding electric push rod M1 drives the valve stem 21 to move to the right end, and then the valve core 22 gradually closes the upper or lower end inlet and outlet oil groove 102. The hydraulic oil output by the hydraulic oil pump enters the valve body through the upper connecting pipe 103 or the lower connecting pipe 104, and then enters the corresponding end of the cylinder barrel of the oil cylinder from the oil outlet pipe 105. When the corresponding set of electric push rods M1 drives the valve core 22 to move along the corresponding guide groove 101 to the right end, the valve core gradually closes to the right, and the amount of hydraulic oil entering gradually decreases, the corresponding valve core 22 will apply less compression force to the corresponding spring 23 to the right, and the spring 23 is compressed and its left end will gradually reduce the pressure on the force-bearing surface of the corresponding pressure sensor A. The 3rd pin of the corresponding pressure sensor A outputs a dynamically changing voltage signal that enters the other end of the corresponding second control sub-circuit adjustable resistor RP1 (the greater the movement of the valve core to the right end, the smaller the oil intake, and the lower the voltage signal, and vice versa). When the distance that the corresponding valve core 22 moves to the right does not reach the distance set by the adjustable resistor RP1 (that is, the set pressure and the set oil intake), the voltage signal output by the 3rd pin of the corresponding pressure sensor A is divided by the adjustable resistor RP1 and the resistor R3, and the resistor R4 reduces the voltage and limits the current to enter the base voltage of the transistor Q1, which is higher than 0.7V. The transistor Q1 will turn on the collector to output a low level and enter the negative power input terminal of the relay K1. The relay K1 is energized to close its control power input terminal and the normally open contact terminal, and the corresponding set of electric push rods M1 continues to drive the valve core to close to the right. When the distance that the corresponding valve core 22 moves to the right reaches the distance set by the adjustable resistor RP1 (that is, the set pressure and the set oil intake), the voltage signal output by the 3rd pin of the corresponding pressure sensor A is divided by the adjustable resistor RP1 and the resistor R3, and the resistor R4 reduces the voltage and limits the current to enter the base voltage of the transistor Q1 below 0.7V. The transistor Q1 will cut off the collector and no longer output a low level to enter the negative power input terminal of the relay K1. The relay K1 will lose power and no longer attract its control power input terminal and the normally open contact terminal to open the circuit. The corresponding set of electric push rods M1 will lose power and no longer work, and will no longer continue to drive the valve core to open to the right. The corresponding valve core is at a set small flow rate to provide hydraulic oil to the cylinder.

[0020] Figure 1 , 2 As shown in , 3, through the above: the staff of the present invention can conveniently control the hydraulic oil to enter the cylinder barrel of the oil cylinder at different flow rates through the power switch, which brings convenience to the staff. The valve body has two oil paths (guide grooves), which can not only push the tool seat to move at a faster speed through the first set of detection control circuits as needed, but also can adjust the stroke of the tool seat movement as accurately as possible through the second set of detection control circuits to achieve better tool stroke control effect (when the tool is far away from the workpiece when feeding or at the initial time of retracting, the oil intake can be relatively large, and when the tool is close to the workpiece when feeding or when retracting near the end point, the oil intake is reduced for precise control, which will not only improve work efficiency, but also can correspondingly prevent the probability of collision damage to the tool, etc.), which provides strong technical support for the stable and reliable operation of the machine tool. Figure 3 Among them, the resistance values ​​of resistors R1, R2, R3, and R4 are 10K, 47K, 10K, and 47K respectively; the transistors Q and Q1 are 9013 NPN transistors; the relays K1 and K2 are DC12V; the electric push rod M1 is a finished product of a small reciprocating electric telescopic rod with a power of 10W; the power module A1 is a finished product of an AC 220 to DC 12V switching power supply module; the resistance values ​​of the adjustable resistors RP and RP1 are 470K (adjusted to 42K and 52K respectively), and the adjustment handles of the adjustable resistors RP and RP1 are located outside the two openings at the front outer end of the component box 4. The side ends of the adjustable resistors RP and RP1 are marked with flow numbers. When the staff adjusts the resistance value of the adjustable resistor RR or RP1 to a relatively large value in advance, its voltage divider Large, so that when the pressure on the subsequent force-bearing surface of the pressure sensor A is relatively large (the amount of hydraulic oil is relatively large or relatively small), the transistor Q or Q1 will be turned on, that is, the relatively large flow rate and relatively small flow rate of the new oil intake are controlled to be relatively large or relatively small; the staff pre-adjusts the resistance value of the adjustable resistor RR or RP1 to be relatively small and its partial pressure is small, so that when the pressure on the subsequent force-bearing surface of the pressure sensor A is relatively small (the amount of hydraulic oil is relatively small or relatively large), the transistor Q or Q1 will be turned on, that is, the relatively small flow rate and relatively large flow rate of the new oil intake are controlled to be relatively large or relatively small; the pressure sensor A is a finished product of an ultra-thin micro weighing sensor model HZC-M1, which has two power input terminals and a signal output terminal.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0022] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-way hydraulic valve for machine tool tool stroke control, comprising a valve body and a valve core mechanism; characterized in that: It also has a detection control circuit; the upper and lower ends of the valve body are provided with two guide grooves distributed laterally, an oil inlet and outlet groove is provided between the two guide grooves of the valve body, and an upper connecting pipe and a lower connecting pipe are respectively installed on the outer sides of the upper inlet and outlet groove and the lower inlet and outlet groove; the upper side of the upper connecting pipe and the lower side of the lower connecting pipe are respectively connected in parallel with the outlet pipe of the hydraulic oil pump, and the rear side of the valve body has an oil outlet pipe which is interconnected with the inlet and outlet groove, and the oil outlet pipe is connected to one side end joint of the cylinder barrel of the hydraulic feed mechanism of the machine tool; the valve core mechanism and the detection control circuit are respectively provided with at least two sets, and each set of the valve core mechanism includes an electric push rod, a valve stem, a valve core, a spring, a guide block, a pressure A sensor, one side end of the valve core and one side end of the valve stem are installed together, one side end of the guide block and the other side end of the valve stem are installed together, and the push column side end of the electric push rod and the other side end of the guide block are installed together; the pressure sensors of the two sets of valve core mechanisms are respectively installed at one end of the inner side of the two guide grooves of the valve body, the springs, valve cores and guide blocks of the two sets of valve core mechanisms are respectively movably sleeved in the two guide grooves, and the outer sides of the electric push rod cylinders of the two sets of valve core mechanisms are respectively installed at one end of the outer side of the two guide grooves; the detection control circuit is installed in the component box, and the power output ends of the two sets of detection control circuits and the power input ends of the electric push rods of the two sets of valve cores are respectively electrically connected.

2. A two-way hydraulic valve for machine tool tool stroke control according to claim 1, characterized in that: The inner diameter of the guide groove at the upper end of the valve body is larger than the inner diameter of the guide groove at the inner lower end, the outer diameter of the valve stem of the two sets of valve core mechanisms is smaller than the outer diameter of the valve core and the guide block, the outer diameter of the valve core and the guide block of the two sets of valve core mechanisms are respectively smaller than the inner diameter of the guide groove at the upper end and the inner lower end of the valve body, and the valve core, the guide block and the guide groove are in a sliding sealing contact structure.

3. A two-way hydraulic valve for machine tool tool stroke control according to claim 1, characterized in that: The force-bearing surface of the pressure sensor contacts one side end of the spring.

4. A two-way hydraulic valve for machine tool tool stroke control according to claim 1, characterized in that: Each detection control circuit includes a first control sub-circuit and a second control sub-circuit. The first control sub-circuit and the second control sub-circuit have the same structure and both include electrically connected relays, adjustable resistors, resistors, and transistors. The positive power input terminal of the relay is connected to the positive control power input terminal, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the other end of the first resistor is connected to the emitter of the transistor and the negative control power input terminal of the relay, and the collector of the transistor is connected to the negative power input terminal of the relay.

5. A two-way hydraulic valve for machine tool tool stroke control according to claim 4, characterized in that: The first control subcircuit and the second control subcircuit signal input terminals of each detection control circuit are electrically connected to the signal output terminals of each pressure sensor.

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