Mechanical positioning and locking hydraulic device and system suitable for stable steel strip groove milling

Abstract

The present application belongs to the technical field of spiral submerged arc welding pipe manufacturing, and particularly relates to a mechanical positioning and locking hydraulic device and system suitable for stable steel strip bevel milling, aiming to solve the problems of poor positioning precision and complex structure of the existing edge milling machine positioning device; the device comprises a main cylinder, a first brake cylinder and a second brake cylinder; the top of the main cylinder, the first brake cylinder and the second brake cylinder is provided with a connecting piece; the main cylinder comprises a main cylinder cylinder, a main cylinder piston and a main piston rod, and the main cylinder cylinder has a first chamber, a second chamber and a third chamber; the first brake cylinder comprises a first taper core structure, a first brake piston, a first brake cylinder end cover, a first gland and a first guide rod; the second brake cylinder comprises a second taper core structure, a second brake piston and a second guide rod, and the bottom and the top of the third chamber are respectively provided with a second brake cylinder end cover and a second gland; the scheme disclosed by the present application integrates the functions of extension, retraction and mechanical positioning and locking into one, has a simple structure and can realize accurate positioning.

Description

Technical Field

[0001] This invention belongs to the field of spiral submerged arc welded pipe manufacturing technology, specifically relating to a mechanical positioning and locking hydraulic device and system suitable for stabilizing steel strip beveling milling. Background Technology

[0002] At present, in the field of spiral submerged arc welded pipe manufacturing, milling machine equipment is used for steel strip beveling. This equipment relies on a hydraulic system with pressure holding function to stabilize its upper jaw device. However, ordinary pressure holding hydraulic system has the following two shortcomings in the process of steel strip beveling: (1) Ordinary hydraulic system with pressure holding function cannot adapt to the high frequency vibration phenomenon that accompanies the process of steel strip beveling. This phenomenon is very likely to cause the failure of the internal seal of the hydraulic cylinder of the actuator in the hydraulic system and the internal leakage of the system, resulting in the upper jaw device of the milling machine being unable to be accurately positioned; (2) Ordinary hydraulic system with pressure holding function uses accumulator for pressure holding and positioning. The system oil itself is compressible. This characteristic is also not conducive to the accurate positioning of the upper jaw device of the milling machine, which directly leads to the upper jaw device of the milling machine being unable to continuously stabilize the relative position between the steel strip and the milling cutter, thereby causing the steel strip beveling size to fluctuate during the milling process, which has an adverse effect on the welding quality and appearance quality of spiral submerged arc welded pipe.

[0003] Most existing milling machine manufacturers use a solution where mechanical positioning and locking mechanisms are added to both sides of the upper jaw assembly to resist changes in external load force, thereby better fixing the upper jaw assembly and preventing changes in bevel dimensions caused by floating during steel strip beveling. However, the following problems exist in its use: ① The mechanical positioning and locking mechanism uses polyurethane wear-resistant plates and locking screws in combination, relying on the friction generated between the mechanism and the upper jaw assembly panel to fix the upper jaw assembly. The friction generated by this method is only suitable for positioning low-grade and thin steel strips, and the positioning effect is poor for high-grade and thick steel strips; ② When changing tracks and replacing the cutter head, it is necessary to first manually loosen the mechanical positioning and locking mechanisms on both sides of the upper jaw assembly, and then operate the upper jaw assembly to rise and fall. After the rise and fall are in place, it is still necessary to manually lock the mechanical positioning and locking mechanisms. The on-site operation process is complicated, resulting in low efficiency of track changing and cutter head replacement operations. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, namely the problems of poor positioning accuracy and complex structure of existing milling machine positioning devices, the present invention provides a mechanical positioning and locking hydraulic device and system suitable for stable steel strip beveling milling.

[0005] The first aspect of the present invention discloses a mechanical positioning and locking hydraulic device suitable for stabilizing steel strip beveling milling. The device includes a main cylinder and a first brake cylinder and a second brake cylinder respectively disposed on both sides of the main cylinder. A connecting member is provided on the top of the main cylinder, the first brake cylinder, and the second brake cylinder. The first connecting member has a first connecting part, a second connecting part, and a third connecting part.

[0006] The main cylinder includes a main cylinder barrel, a main cylinder piston, and a main piston rod. The main cylinder barrel has a first chamber, a second chamber, and a third chamber. The main cylinder piston is disposed in the first chamber. A main cylinder front end cover is disposed on the top of the first chamber. One end of the main piston rod is sleeved with the main cylinder piston, and the other end passes through the main cylinder front end cover and is connected to the first connecting part.

[0007] The first brake cylinder includes a first conical structure, a first brake piston, and a first guide rod. The bottom and top of the second chamber are respectively provided with a first brake cylinder end cover and a first pressure cover. The first conical structure is disposed between the first brake cylinder end cover and the first pressure cover. The first brake piston is sleeved on the first conical structure. The first guide rod passes through the first brake cylinder end cover, the first conical structure, and the first pressure cover from bottom to top, and extends to connect with the second connecting part.

[0008] The second brake cylinder includes a second conical structure, a second brake piston, and a second guide rod. The bottom and top of the third chamber are respectively provided with a second brake cylinder end cap and a second pressure cap. The second conical structure is disposed between the second brake cylinder end cap and the second pressure cap. The second brake piston is sleeved on the second conical structure. The second guide rod passes through the second brake cylinder end cap, the second conical structure, and the second pressure cap from bottom to top, and extends to connect with the third connecting part.

[0009] In some preferred embodiments, the first chamber is open;

[0010] The second chamber and the third chamber are connected.

[0011] In some preferred embodiments, the top outer diameter of the first conical structure is larger than the bottom outer diameter;

[0012] The first pressure cap includes a first shaft segment, a second shaft segment, and a third shaft segment arranged adjacent to each other. The outer diameter of the first shaft segment is d1, the outer diameter of the second shaft segment is d2, and the outer diameter of the third shaft segment is d3, where d1 > d2 > d3.

[0013] The inner diameter of the second chamber is D1, where d1 > D1 > d3;

[0014] The top of the first conical structure abuts against the end of the third shaft segment.

[0015] In some preferred embodiments, the first brake cylinder end cover includes a fourth shaft segment, a fifth shaft segment, and a sixth shaft segment arranged adjacent to each other, wherein the outer diameter of the fourth shaft segment is d4, the outer diameter of the fifth shaft segment is d5, and the outer diameter of the sixth shaft segment is d6, where d6 > d5 > d4;

[0016] D6 > D1 > d4;

[0017] The bottom of the first conical structure is positioned to abut against the fourth shaft segment.

[0018] In some preferred embodiments, the first brake piston includes a piston body and a raised inverted cone structure, the raised inverted cone structure being disposed on the inner wall of the piston body; the inner diameter of the piston body is larger than the top outer diameter of the first cone structure; the inner side of the upper end and the inner side of the lower end of the piston body are respectively in contact with the outer wall of the third shaft segment and the outer wall of the fourth shaft segment;

[0019] The inner wall of the raised inverted truncated cone structure is matched with the outer wall of the first conical core structure, and the height of the raised inverted truncated cone structure is less than the height of the first conical core structure.

[0020] In some preferred embodiments, the piston body and the raised inverted cone structure are integrally formed.

[0021] In some preferred embodiments, the structure of the second brake cylinder is consistent with that of the first brake cylinder.

[0022] In some preferred embodiments, the device further includes a controller for controlling the operating states of the master cylinder, the first brake cylinder, and the second brake cylinder;

[0023] A first oil chamber is provided between the master cylinder piston and the bottom of the first chamber to accommodate the discharged oil.

[0024] The bottom of the piston body and the first brake cylinder end cover form an oil inlet cavity, and the top and the first pressure cap form an oil outlet cavity.

[0025] During operation, when the master cylinder moves to a preset position and needs to be positioned, the controller controls the oil supply device to fill the oil inlet chambers of the first brake cylinder and the second brake cylinder with oil, so as to push the first brake piston and the second brake piston to move upward and abut against the first conical structure and the second conical structure respectively, so as to lock the first guide rod and the second guide rod, thereby realizing the positioning of the master cylinder.

[0026] The second aspect of the present invention discloses a mechanical positioning and locking hydraulic system suitable for milling bevels of stable steel strips, used for automatic positioning and locking of the upper jaw device of a milling machine, characterized in that it includes a left upper jaw device positioning component, a right upper jaw device positioning component, and a central control center, wherein the left upper jaw device positioning component and the right upper jaw device positioning component are both signal connected to the central control center;

[0027] The left bed upper jaw device positioning assembly includes a first positioning assembly and a second positioning assembly, and the first positioning assembly and the second positioning assembly are respectively disposed on the left bed of the milling machine.

[0028] The right bed upper jaw device positioning assembly includes a third positioning assembly and a fourth positioning assembly, wherein the third positioning assembly and the fourth positioning assembly are respectively disposed on the right bed of the milling machine.

[0029] In operation, the central control center controls the oil supply and drainage of the first and second positioning components to precisely position the upper jaw device on the left bed of the milling machine, and controls the oil supply and drainage of the third and fourth positioning components to precisely position the upper jaw device on the right bed of the milling machine.

[0030] The first positioning component, the second positioning component, the third positioning component, and the fourth positioning component are all the mechanical positioning and locking hydraulic devices suitable for milling bevels of stable steel strips.

[0031] In some preferred embodiments, the first positioning component and the second positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine.

[0032] The third positioning component and the fourth positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine.

[0033] The first positioning component and the third positioning component are symmetrically arranged with respect to the longitudinal central axis of the milling machine.

[0034] The beneficial effects of this invention are as follows:

[0035] 1) The mechanical positioning and locking hydraulic device and system disclosed in this application are suitable for stable steel strip beveling milling. They can achieve precise positioning of high-grade steel strips with large wall thickness, thereby stabilizing the steel strip beveling milling dimensions to the optimal state required by the process, fundamentally solving the technical problem of stabilizing the steel strip beveling milling dimensions.

[0036] 2) By applying the solution disclosed in this invention in practice, the welding quality and appearance quality of spiral submerged arc welded pipes can be greatly improved, promoting the development of spiral submerged arc welded pipes towards high quality in the pipe manufacturing field.

[0037] 3) The mechanical positioning and locking hydraulic device disclosed in this invention, which is suitable for milling bevels of stable steel strips, integrates the extension and retraction functions of ordinary hydraulic cylinders with the mechanical positioning and locking functions. Through the cooperation of hydraulic and electrical systems, one-button operation is achieved. Its ease of operation greatly reduces the labor intensity of the operators and improves the efficiency of track changing and cutter head replacement. Attached Figure Description

[0038] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of a specific embodiment of the mechanical positioning and locking hydraulic system for stabilizing steel strip beveling in this invention;

[0040] Figure 2 This is a cross-sectional schematic diagram of a specific embodiment of the mechanical positioning and locking hydraulic device for stabilizing steel strip beveling in the present invention;

[0041] Figure 3 yes Figure 2 Another perspective illustration;

[0042] Figure 4 yes Figure 1 A schematic diagram of a specific embodiment.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10A, First positioning component; 10B, Third positioning component;

[0045] 100. Master cylinder; 110. Master cylinder barrel; 120. Master cylinder piston; 130. Master cylinder front end cover; 140. Master piston rod; 101. Main oil inlet; 102. Main oil outlet; 200. First brake cylinder; 201. First oil inlet; 202. First oil outlet; 203. Second oil inlet; 204. Second oil outlet; 210. First brake cylinder end cover; 220. First conical structure; 230. First brake piston; 240. First pressure cap; 250. First guide rod; 300. Second brake cylinder; 310. Second brake cylinder end cover; 320. Second conical structure; 330. Second brake piston; 340. Second pressure cap; 350. Second guide rod; 400. Connecting piece;

[0046] 1. First master cylinder; 2. Second master cylinder; 3. First brake cylinder assembly; 4. Second brake cylinder assembly; 5. Third brake cylinder assembly; 6. Fourth brake cylinder assembly; 7. Third master cylinder; 8. Fourth master cylinder; 9. First flow divider / combiner valve; 10. Second flow divider / combiner valve; 11. First stacked double one-way throttle valve; 12. Second stacked double one-way throttle valve; 13. First directional control valve; 14. Second directional control valve; 15. Third directional control valve; 16. Fourth directional control valve; 17. First check valve; 18. Second check valve; 19. Pressure sensor; 20. Accumulator; 21. Pressure gauge; 22. Accumulator safety valve assembly; 23. Solenoid relief valve; 24. Hydraulic pump assembly; 25. Suction filter; 26. Return filter; 27. Cooler; 28. Oil tank. Detailed Implementation

[0047] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0048] A first aspect of the present invention provides a mechanical positioning and locking hydraulic device suitable for stabilizing steel strip beveling milling. The device includes a main cylinder and a first brake cylinder and a second brake cylinder respectively disposed on both sides of the main cylinder. A connecting member is disposed on the top of the main cylinder, the first brake cylinder, and the second brake cylinder. The first connecting member has a first connecting portion, a second connecting portion, and a third connecting portion. The main cylinder includes a main cylinder barrel, a main cylinder piston, and a main piston rod. The main cylinder barrel has a first chamber, a second chamber, and a third chamber. The main cylinder piston is disposed in the first chamber. A main cylinder front end cover is disposed on the top of the first chamber. One end of the main piston rod is sleeved with the main cylinder piston, and the other end passes through the main cylinder front end cover and is connected to the first connecting portion.

[0049] The first brake cylinder includes a first conical structure, a first brake piston, and a first guide rod. The bottom and top of the second chamber are respectively provided with a first brake cylinder end cap and a first pressure cap. The first conical structure is disposed between the first brake cylinder end cap and the first pressure cap. The first brake piston is sleeved on the first conical structure. The first guide rod passes through the first brake cylinder end cap, the first conical structure, and the first pressure cap sequentially from bottom to top, and extends to connect with the second connecting part. The second brake cylinder includes a second conical structure, a second brake piston, and a second guide rod. The bottom and top of the third chamber are respectively provided with a second brake cylinder end cap and a second pressure cap. The second conical structure is disposed between the second brake cylinder end cap and the second pressure cap. The second brake piston is sleeved on the second conical structure. The second guide rod passes through the second brake cylinder end cap, the second conical structure, and the second pressure cap sequentially from bottom to top, and extends to connect with the third connecting part.

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0051] See attached document Figure 1 This invention discloses a mechanical positioning and locking hydraulic system suitable for stabilizing the dimensions of steel strip beveling during milling, used for the automatic positioning and locking of the upper jaw assembly of a milling machine. Its features include a left-side upper jaw assembly positioning component, a right-side upper jaw assembly positioning component, and a central control center. Both the left-side and right-side upper jaw assembly positioning components are signal-connected to the central control center. The left-side upper jaw assembly positioning component includes a first positioning component 10A and a second positioning component (not shown in the figure), which are respectively disposed on the left side of the milling machine. The right-side upper jaw assembly positioning component includes a first positioning component 10A and a second positioning component (not shown in the figure). The first and second positioning components are respectively disposed on the left side of the milling machine. The three positioning components 10B and the fourth positioning component (not shown in the figure) are respectively installed on the right bed of the milling machine. In the working state, the central control center controls the oil supply and drainage of the first and second positioning components to accurately position the upper jaw device of the left bed of the milling machine, and controls the oil supply and drainage of the third and fourth positioning components to accurately position the upper jaw device of the right bed of the milling machine. The first, second, third, and fourth positioning components are all mechanical positioning and locking hydraulic devices suitable for stable steel strip beveling milling as described in another aspect of the present invention.

[0052] Preferably, the first positioning component and the second positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine; the third positioning component and the fourth positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine; and the first positioning component and the third positioning component are symmetrically arranged with respect to the longitudinal central axis of the milling machine.

[0053] The following is a reference to the appendix. Figure 2 and attached Figure 3 A specific embodiment of the mechanical positioning and locking hydraulic device suitable for beveling steel strips is described in detail.

[0054] Specifically, the device includes a master cylinder 100, a first brake cylinder 200, and a second brake cylinder 300, with the first and second brake cylinders respectively located on both sides of the master cylinder; a connector 400 is provided on the top of the master cylinder, the first brake cylinder, and the second brake cylinder; the first connector has a first connecting part, a second connecting part, and a third connecting part.

[0055] The master cylinder includes a master cylinder barrel 110, a master cylinder piston 120, and a master piston rod 140. The master cylinder barrel has a first chamber, a second chamber, and a third chamber. The master cylinder piston is disposed in the first chamber. A master cylinder front end cover 130 is disposed on the top of the first chamber. One end of the master piston rod is sleeved with the master cylinder piston, and the other end passes through the master cylinder front end cover and is connected to the first connecting part.

[0056] The first brake cylinder includes a first conical structure 220, a first brake piston 230, and a first guide rod 250. The bottom and top of the second chamber are respectively provided with a first brake cylinder end cover 210 and a first pressure cover 240. The first conical structure is disposed between the first brake cylinder end cover and the first pressure cover. The first brake piston is sleeved on the first conical structure. The first guide rod passes through the first brake cylinder end cover, the first conical structure, and the first pressure cover from bottom to top, and extends to connect with the second connecting part.

[0057] The second brake cylinder includes a second conical structure 320, a second brake piston 330, and a second guide rod 350. The bottom and top of the third chamber are respectively provided with a second brake cylinder end cover 310 and a second pressure cover 340. The second conical structure is disposed between the second brake cylinder end cover and the second pressure cover. The second brake piston is sleeved on the second conical structure. The second guide rod passes through the second brake cylinder end cover, the second conical structure, and the second pressure cover from bottom to top, and extends to connect with the third connecting part.

[0058] The first chamber is open; the second and third chambers are connected.

[0059] Specifically, the top outer diameter of the first conical structure is larger than the bottom outer diameter; the first pressure cap includes a first shaft segment, a second shaft segment, and a third shaft segment arranged adjacent to each other, with the outer diameter of the first shaft segment being d1, the outer diameter of the second shaft segment being d2, and the outer diameter of the third shaft segment being d3, where d1 > d2 > d3; the inner diameter of the second chamber is D1, where d1 > D1 > d3; the top of the first conical structure abuts against the end of the third shaft segment.

[0060] The first brake cylinder end cover includes a fourth shaft segment, a fifth shaft segment, and a sixth shaft segment arranged adjacent to each other. The outer diameter of the fourth shaft segment is d4, the outer diameter of the fifth shaft segment is d5, and the outer diameter of the sixth shaft segment is d6, where d6 > d5 > d4 and D6 > D1 > d4. The bottom of the first conical structure is arranged in contact with the fourth shaft segment.

[0061] Specifically, the first brake piston includes a piston body and a raised inverted cone structure, the raised inverted cone structure being disposed on the inner wall of the piston body; the inner diameter of the piston body is larger than the top outer diameter of the first cone structure; the inner side of the upper end and the inner side of the lower end of the piston body are respectively in contact with the outer wall of the third shaft segment and the outer wall of the fourth shaft segment; the inner wall of the raised inverted cone structure is matched with the outer wall of the first cone structure and the height of the raised inverted cone structure is smaller than the height of the first cone structure.

[0062] Furthermore, the main cylinder barrel is provided with a main oil inlet 101 and a main oil outlet 102 at positions corresponding to the first chamber, for controlling the oil intake and discharge of the main cylinder; the main cylinder barrel is provided with a first oil inlet 201 and a first oil outlet 202 at positions corresponding to the second chamber, for controlling the oil intake and discharge of the first brake cylinder; the main cylinder barrel is provided with a second oil inlet 203 and a second oil outlet 204 at positions corresponding to the third chamber, for controlling the oil intake and discharge of the second brake cylinder; the first brake cylinder and the second brake cylinder constitute a brake cylinder group.

[0063] Preferably, the piston body and the raised inverted cone structure are integrally formed.

[0064] Furthermore, the device also includes a controller for controlling the working state of the master cylinder, the first brake cylinder, and the second brake cylinder; the master cylinder piston and the bottom of the first chamber form a first oil chamber for containing oil; the master cylinder piston and the bottom of the master cylinder front end cover form a second oil chamber for containing oil; during operation, when oil is injected into the first oil chamber, the oil in the second oil chamber is discharged, realizing the corresponding upward control, and vice versa.

[0065] The bottom of the piston body and the end cover of the first brake cylinder form an oil inlet cavity, and the top and the first pressure cap form an oil outlet cavity. During operation, when the master cylinder moves to a preset position and needs to be positioned, the controller controls the oil supply device to fill the oil inlet cavities of the first and second brake cylinders with oil, so as to push the first and second brake pistons to move upward and abut against the first and second conical structures respectively, thereby locking the first and second guide rods and thus achieving the positioning of the master cylinder.

[0066] Preferably, the structure of the second brake cylinder is the same as that of the first brake cylinder.

[0067] Specifically, the second conical structure is configured identically to the first conical structure, meaning that the top outer diameter of the second conical structure is larger than the bottom outer diameter; the second pressure cap includes a first pressure cap shaft section, a second pressure cap shaft section, and a third pressure cap shaft section arranged adjacent to each other, the outer diameter of the first pressure cap shaft section is larger than the outer diameter of the second pressure cap shaft section, which is larger than the outer diameter of the third pressure cap shaft section; the outer diameter of the first pressure cap shaft section is larger than the inner diameter of the third chamber, and the inner diameter of the third chamber is larger than the outer diameter of the third pressure cap shaft section; the top of the second conical structure abuts against the end of the third pressure cap shaft section.

[0068] Specifically, the second brake cylinder end cover has the same structure as the first brake cylinder end cover, that is, the second brake cylinder end cover includes a fourth end cover shaft section, a fifth end cover shaft section and a sixth end cover shaft section arranged adjacent to each other. The outer diameter of the fourth end cover shaft section is smaller than the outer diameter of the fifth end cover shaft section and the outer diameter of the sixth end cover shaft section. The outer diameter of the sixth end cover shaft section is larger than the inner diameter of the third chamber and the inner diameter of the third chamber is larger than the outer diameter of the fourth end cover shaft section. The bottom of the second conical structure abuts against the fourth end cover shaft section.

[0069] Specifically, the second brake piston has the same structure as the first brake piston; the second guide rod has the same structure as the first guide rod.

[0070] The device consists of a main cylinder and two brake cylinders. The main cylinder is used to realize the raising and lowering of the jaw device of the milling machine. The brake cylinders rely on the conical structure between the internal piston and the cylinder rod to realize the mechanical positioning and locking function of the main cylinder position, i.e., any position of the jaw device of the milling machine, under the action of the matching hydraulic system.

[0071] Compared with hydraulic cylinders that rely on stacked springs to achieve mechanical self-locking, the device disclosed in this invention has the advantage that the locking force is not affected by the number and specifications of the stacked springs, and its locking force mainly depends on the hydraulic pressure set by the external hydraulic system. Therefore, the mechanical positioning and locking hydraulic cylinder involved in this invention is more suitable for parts with large locking force requirements and limited space.

[0072] Compared with ordinary hydraulic cylinders, the device disclosed in this invention can realize extension and retraction actions, and achieves positioning and locking effect of the main cylinder at any position through the set conical structure.

[0073] In this embodiment, the first brake cylinder and the second brake cylinder have the same structure. That is, the device consists of a main cylinder and two brake cylinder groups. The main cylinder is used to realize the raising and lowering of the jaw device of the milling machine. The brake cylinder group relies on the conical structure between the internal piston and the cylinder rod to realize the mechanical positioning and locking function of the main cylinder position, i.e. the position of the jaw device of the milling machine, under the action of the matching hydraulic system. This mechanical positioning and locking hydraulic cylinder integrates the extension and retraction function of ordinary hydraulic cylinder with the mechanical positioning and locking function. Through the cooperation of the hydraulic system and the electrical system, one-button operation is realized. Its convenient operation reduces the labor intensity of the operator and improves the efficiency of track changing and cutter head changing operations.

[0074] See attached document Figure 1 At the same time, refer to the appendix Figure 4 The present invention discloses a mechanical positioning and locking hydraulic system suitable for stabilizing the milling dimensions of steel strip bevels, comprising a first positioning component, a second positioning component, a third positioning component, and a fourth positioning component. For ease of description, the four positioning components in the system are described in detail below.

[0075] Specifically, the first positioning component (i.e., the first mechanical positioning and locking hydraulic cylinder) includes a first master cylinder 1 and a first brake cylinder group 3; the second positioning component (i.e., the second mechanical positioning and locking hydraulic cylinder) includes a second master cylinder 2 and a second brake cylinder group 4; the third positioning component (i.e., the third mechanical positioning and locking hydraulic cylinder) includes a third master cylinder 7 and a third brake cylinder group 5; and the fourth positioning component (i.e., the fourth mechanical positioning and locking hydraulic cylinder) includes a fourth master cylinder 8 and a fourth brake cylinder group 6.

[0076] The system also includes a first diversion and combiner valve 9, a second diversion and combiner valve 10, a first stacked double one-way throttle valve 11, a second stacked double one-way throttle valve 12, a first reversing valve 13, a second reversing valve 14, a third reversing valve 15, a fourth reversing valve 16, a first one-way valve 17, a second one-way valve 18, a pressure sensor 19, an accumulator 20, a pressure gauge 21, an accumulator safety valve assembly 22, a solenoid relief valve 23, a hydraulic pump assembly 24, a suction filter 25, and a return filter. The system includes a device 26, a cooler 27, and an oil tank 28. The A port of the first directional valve is connected to the first port (i.e., the lower port in the figure) of the first diverter and combiner valve through a first stacked double one-way throttle valve. The second port (i.e., the upper left port in the figure) and the third port (i.e., the upper right port in the figure) of the first diverter and combiner valve are respectively connected to the rodless chambers of the first master cylinder and the second master cylinder. The B port of the first directional valve is connected to the rod chambers of the first master cylinder and the second master cylinder through a first stacked double one-way throttle valve.

[0077] The A port of the second directional valve is connected to the first port (i.e., the lower port in the figure) of the second diverter and combiner valve through the second superimposed double one-way throttle valve. The second port (i.e., the upper left port in the figure) and the third port (i.e., the upper right port in the figure) of the second diverter and combiner valve are connected to the rodless chambers of the third master cylinder and the fourth master cylinder, respectively. The B port of the second directional valve is connected to the rod chambers of the third master cylinder and the fourth master cylinder through the second superimposed double one-way throttle valve.

[0078] The A port of the third directional valve is connected to the rodless chamber of the first and second brake cylinder groups respectively, and the B port of the third directional valve is connected to the rod chamber of the first and second brake cylinder groups respectively; the A port of the fourth directional valve is connected to the rodless chamber of the third and fourth brake cylinder groups respectively, and the B port of the fourth directional valve is connected to the rod chamber of the third and fourth brake cylinder groups respectively.

[0079] The P port of the third reversing valve and the P port of the fourth reversing valve are connected to the accumulator and pressure gauge through pressure sensors P / N, and then to the inlet of the accumulator safety valve group. The return port of the accumulator safety valve group is connected to the oil tank.

[0080] The system pressure oil is connected to the inlet of the hydraulic pump unit through the inlet filter, and the outlet of the hydraulic pump unit is connected to the inlet of the first check valve. It is also connected to the inlet of the solenoid relief valve. The return port of the solenoid relief valve is connected to the oil tank through the return oil filter and the cooler. The outlet of the first check valve is connected to the P port of the first directional valve and the P port of the second directional valve. It is also connected to the P port of the third directional valve and the P port of the fourth directional valve through the second check valve. The T ports of the first, second, third, and fourth directional valves are connected to the oil tank through the return oil filter and the cooler.

[0081] Specifically, the specific implementation of the hydraulic system is as follows: After the hydraulic pump group 24 is started, 1YT is energized, and the pressure oil reaches the set pressure through the electromagnetic relief valve 23. Then, 4YT is energized, and the pressure oil enters the rod chamber of the first brake cylinder group 3 and the second brake cylinder group 4 through the first one-way valve 17, the second one-way valve 18 and the left position of the third reversing valve 15. The oil in the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4 returns to the oil tank through the left position of the third reversing valve 15, the return oil filter 26 and the cooler 27. At this time, the first master cylinder 1 and the second master cylinder 2 are in the unlocked position state.

[0082] Subsequently, when 2YT is powered on, the pressurized oil enters the rod chambers of the first master cylinder 1 and the second master cylinder 2 through the first one-way valve 17, the left position of the first reversing valve 13, and the one-way valve on the right side of the first superimposed double one-way throttle valve 11. The oil in the rodless chambers of the first master cylinder and the second master cylinder returns to the oil tank through the first diversion and collection valve 9, the throttle valve on the left side of the first superimposed double one-way throttle valve 11, the left position of the first reversing valve 13, the return oil filter 26, and the cooler 27, thereby realizing the downward pressing action of the jaw device on the left bed of the milling machine.

[0083] After the pressure is fully depressed, 2YT and 4YT are de-energized. At this time, the pressurized oil enters the rodless chambers of the first brake cylinder group 3 and the second brake cylinder group 4 through the first one-way valve 17, the second one-way valve 18, and the right position of the third directional valve 15. The oil in the rod chambers of the first brake cylinder group 3 and the second brake cylinder group 4 returns to the oil tank through the right position of the third directional valve 15, the return oil filter 26, and the cooler 27, thus achieving mechanical positioning and locking of the first master cylinder and the second master cylinder. The hydraulic pump group 24 is then shut down. At this time, the pressurized oil in the accumulator 20 passes through the third directional valve 15. The valve 15 enters the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4 at the right position to maintain pressure in the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4. That is, the mechanical locking force remains stable when the hydraulic pump group 24 is closed. When the system oil pressure drops to the low pressure value set by the pressure sensor 19 due to internal leakage, the pressure sensor 19 will send a start signal to the hydraulic pump group 24. At this time, 1YT is energized to rebuild the system pressure, thereby ensuring the accurate and reliable positioning of the lower jaw device on the left bed of the milling machine.

[0084] Similarly, after the hydraulic pump unit 24 starts, 1YT is energized, and the pressurized oil reaches the set pressure through the solenoid relief valve 23. Then, 5YT is energized, and the pressurized oil enters the rod chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 through the first check valve 17, the second check valve 18, and the left position of the fourth directional valve 16. The oil in the rodless chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 returns to the oil tank through the left position of the fourth directional valve 16, the return oil filter 26, and the cooler 27. At this time, the third master cylinder 7 and the fourth master cylinder 8 are in the unlocked position state. Then, 6YT is energized. Electricity and pressurized oil enter the rod chambers of the third master cylinder 7 and the fourth master cylinder 8 through the first one-way valve 17, the left position of the second reversing valve 14, and the one-way valve on the right side of the second stacked double one-way throttle valve 11. Oil in the rodless chambers of the third master cylinder 7 and the fourth master cylinder 8 returns to the oil tank through the second diverter valve 10, the throttle valve on the left side of the second stacked double one-way throttle valve 12, the left position of the second reversing valve 13, the return oil filter 26, and the cooler 27, thus realizing the downward pressing action of the jaw assembly on the left bed of the milling machine. After pressing to the desired position, 5YT When the 6YT is de-energized, the pressurized oil enters the rodless chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 through the first check valve 17, the second check valve 18, and the right position of the fourth directional valve 16. The oil in the rod chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 returns to the oil tank through the right position of the fourth directional valve 16, the return oil filter 26, and the cooler 27, thus achieving mechanical positioning and locking of the third master cylinder 7 and the fourth master cylinder 8. The hydraulic pump group 24 is shut down. At this time, the pressurized oil in the accumulator 20 passes through the fourth directional valve 17. The right position enters the rodless chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6 to maintain pressure in the rodless chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6. That is, the mechanical locking force remains stable when the hydraulic pump group 24 is closed. When the system oil pressure drops to the low pressure value set by the pressure sensor 19 due to internal leakage, the pressure sensor 19 will send a start signal to the hydraulic pump group 24. At this time, 1YT is energized to rebuild the system pressure, thereby ensuring the accurate and reliable positioning of the lower jaw device on the right bed of the milling machine.

[0085] After the left and right upper jaw devices of the milling machine are adjusted and mechanically locked according to the steel strip bevel size process requirements, the steel strip bevel milling process begins. After the steel strip bevel milling is completed, the hydraulic pump group 24 is started, 1YT is energized, and the pressure oil reaches the set pressure through the electromagnetic overflow valve 23. Then, 4YT is energized, and the pressure oil enters the rod chamber of the first brake cylinder group 3 and the second brake cylinder group 4 through the left position of the first one-way valve 17, the second one-way valve 18 and the third reversing valve 15. The oil in the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4 returns to the oil tank through the left position of the third reversing valve 15, the return oil filter 26 and the cooler 27. At this time, the first master cylinder 1 and the second master cylinder 2 are in the unlocked position state.

[0086] Subsequently, when the 3YT is powered on, the pressurized oil enters the rodless chambers of the first main cylinder 1 and the second main cylinder 2 through the first one-way valve 17, the right position of the first reversing valve 13, the one-way valve on the left side of the first stacked double one-way throttle valve 11, and the first diverter and collector valve 9. The oil in the rod chambers of the first main cylinder and the second main cylinder returns to the oil tank through the throttle valve on the right side of the first stacked double one-way throttle valve 11, the right position of the first reversing valve 13, the return oil filter 26, and the cooler 27, thereby realizing the lifting action of the jaw device on the left bed of the milling machine.

[0087] After the cylinders are raised to their final position, 3YT and 4YT are de-energized. At this time, the pressurized oil enters the rodless chambers of the first brake cylinder group 3 and the second brake cylinder group 4 through the first one-way valve 17, the second one-way valve 18, and the right position of the third directional valve 15. The oil in the rod chambers of the first brake cylinder group 3 and the second brake cylinder group 4 returns to the oil tank through the right position of the third directional valve 15, the return oil filter 26, and the cooler 27, thus achieving mechanical positioning and locking of the first master cylinder 1 and the second master cylinder 2. The hydraulic pump group 24 is then shut down. At this time, the pressurized oil in the accumulator 20 passes through the third... The right position of the reversing valve 15 enters the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4 to maintain pressure in the rodless chamber of the first brake cylinder group 3 and the second brake cylinder group 4. That is, when the hydraulic pump group 24 is closed, the mechanical locking force remains stable. When the system oil pressure drops to the low pressure value set by the pressure sensor 19 due to internal leakage, the pressure sensor 19 will send a start signal to the hydraulic pump group 24. At this time, 1YT is energized to rebuild the system pressure, thereby ensuring the accurate and reliable positioning of the upper jaw device on the left bed of the milling machine.

[0088] Similarly, when hydraulic pump unit 24 is started and 1YT is energized, the pressurized oil reaches the set pressure through electromagnetic relief valve 23. Then, 5YT is energized, and the pressurized oil enters the rod chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6 through the first check valve 17, the second check valve 18 and the left position of the fourth directional valve 16. The oil in the rodless chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6 returns to the oil tank through the left position of the fourth directional valve 15, the return oil filter 26 and the cooler 27. At this time, the third master cylinder 7 and the fourth master cylinder 8 are in the unlocked position state.

[0089] Subsequently, when 7YT is powered on, the pressurized oil enters the rodless chambers of the third main cylinder 7 and the fourth main cylinder 8 through the first one-way valve 17, the right position of the second reversing valve 14, the one-way valve on the left side of the second superimposed double one-way throttle valve 12, and the second diverter and collector valve 10. The oil in the rod chambers of the third main cylinder 7 and the fourth main cylinder 8 returns to the oil tank through the throttle valve on the right side of the second superimposed double one-way throttle valve 12, the right position of the second reversing valve 14, the return oil filter 26, and the cooler 27, thereby realizing the lifting action of the jaw device on the left bed of the milling machine.

[0090] After the cylinders are raised to their final position, 5YT and 7YT are de-energized. At this time, the pressurized oil enters the rodless chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 through the first one-way valve 17, the second one-way valve 18, and the right position of the fourth directional valve 16. The oil in the rod chambers of the third brake cylinder group 5 and the fourth brake cylinder group 6 returns to the oil tank through the right position of the fourth directional valve 16, the return oil filter 26, and the cooler 27, thus achieving mechanical positioning and locking of the third master cylinder 7 and the fourth master cylinder 8. The hydraulic pump group 24 is then shut down. At this time, the pressurized oil in the accumulator 20 passes through the fourth... The right position of the reversing valve 16 enters the rodless chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6 to maintain pressure in the rodless chamber of the third brake cylinder group 5 and the fourth brake cylinder group 6. That is, when the hydraulic pump group 24 is closed, the mechanical locking force remains stable. When the system oil pressure drops to the low pressure value set by the pressure sensor 19 due to internal leakage, the pressure sensor 19 will send a start signal to the hydraulic pump group 24. At this time, 1YT is energized to rebuild the system pressure, thereby ensuring the accurate and reliable positioning of the upper jaw device of the right bed of the milling machine.

[0091] The solution disclosed in this invention is the first application of this technology in milling machines. It integrates the extension and retraction functions of a conventional hydraulic cylinder with the mechanical positioning and locking function. Through cooperation with the electrical system, it achieves one-button operation. Compared with the existing technology (that is, adding mechanical positioning and locking mechanisms on both sides of the jaw device of the milling machine to resist changes in external load force), it achieves one-button operation while significantly increasing the mechanical locking force. This not only greatly improves the stability of the steel strip beveling dimensions, but also greatly reduces the labor intensity of the operators. The efficiency of changing tracks and changing cutter heads is also improved.

[0092] Although the invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0093] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0094] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0095] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0096] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A mechanical positioning and locking hydraulic device suitable for stabilizing steel strip beveling, characterized in that, The device includes a master cylinder, and a first brake cylinder and a second brake cylinder respectively disposed on both sides of the master cylinder; the top of the master cylinder, the first brake cylinder, and the second brake cylinder are provided with connecting members; the connecting members have a first connecting part, a second connecting part, and a third connecting part; The main cylinder includes a main cylinder barrel, a main cylinder piston, and a main piston rod. The main cylinder barrel has a first chamber, a second chamber, and a third chamber. The main cylinder piston is disposed in the first chamber. A main cylinder front end cover is disposed on the top of the first chamber. One end of the main piston rod is sleeved with the main cylinder piston, and the other end passes through the main cylinder front end cover and is connected to the first connecting part. The first brake cylinder includes a first conical structure, a first brake piston, and a first guide rod. The bottom and top of the second chamber are respectively provided with a first brake cylinder end cover and a first pressure cover. The first conical structure is disposed between the first brake cylinder end cover and the first pressure cover. The first brake piston is sleeved on the first conical structure. The first guide rod passes through the first brake cylinder end cover, the first conical structure, and the first pressure cover from bottom to top, and extends to connect with the second connecting part. The second brake cylinder includes a second conical structure, a second brake piston, and a second guide rod. The bottom and top of the third chamber are respectively provided with a second brake cylinder end cap and a second pressure cap. The second conical structure is disposed between the second brake cylinder end cap and the second pressure cap. The second brake piston is sleeved on the second conical structure. The second guide rod passes through the second brake cylinder end cap, the second conical structure, and the second pressure cap from bottom to top, and extends to connect with the third connecting part. The first chamber is open; the second chamber and the third chamber are both interconnected. The top outer diameter of the first conical structure is larger than the bottom outer diameter; the first pressure cap includes a first shaft segment, a second shaft segment, and a third shaft segment arranged adjacent to each other, the outer diameter of the first shaft segment is d1, the outer diameter of the second shaft segment is d2, and the outer diameter of the third shaft segment is d3, where d1 > d2 > d3; the inner diameter of the second chamber is D1, where d1 > D1 > d3; the top of the first conical structure abuts against the end of the third shaft segment; The first brake cylinder end cover includes a fourth shaft segment, a fifth shaft segment, and a sixth shaft segment arranged adjacent to each other. The outer diameter of the fourth shaft segment is d4, the outer diameter of the fifth shaft segment is d5, and the outer diameter of the sixth shaft segment is d6, where d6 > d5 > d4 and d6 > D1 > d4. The bottom of the first conical structure abuts against the fourth shaft segment. The first brake piston includes a piston body and a raised inverted cone structure, the raised inverted cone structure being disposed on the inner wall of the piston body; the inner diameter of the piston body is larger than the top outer diameter of the first cone structure; the inner side of the upper end and the inner side of the lower end of the piston body are respectively in contact with the outer wall of the third shaft segment and the outer wall of the fourth shaft segment; the inner wall of the raised inverted cone structure is matched with the outer wall of the first cone structure and the height of the raised inverted cone structure is smaller than the height of the first cone structure.

2. The mechanical positioning and locking hydraulic device for stabilizing steel strip beveling milling according to claim 1, characterized in that, The piston body and the raised inverted cone structure are integrally formed.

3. The mechanical positioning and locking hydraulic device for stabilizing steel strip beveling milling according to claim 1, characterized in that, The device also includes a controller for controlling the working status of the master cylinder, the first brake cylinder, and the second brake cylinder; A first oil chamber is provided between the master cylinder piston and the bottom of the first chamber to accommodate the discharged oil. The bottom of the piston body and the first brake cylinder end cover form an oil inlet cavity, and the top and the first pressure cap form an oil outlet cavity. During operation, when the master cylinder moves to a preset position and needs to be positioned, the controller controls the oil supply device to fill the oil inlet chambers of the first brake cylinder and the second brake cylinder with oil, so as to push the first brake piston and the second brake piston to move upward and abut against the first conical structure and the second conical structure respectively, so as to lock the first guide rod and the second guide rod, thereby realizing the positioning of the master cylinder.

4. A mechanical positioning and locking hydraulic system suitable for stabilizing the dimensions of steel strip beveling during milling, used for automatic positioning and locking of the upper jaw assembly of a milling machine, characterized in that, It includes a left bed jaw device positioning component, a right bed jaw device positioning component, and a central control center. The left bed jaw device positioning component and the right bed jaw device positioning component are both signal-connected to the central control center. The left bed upper jaw device positioning assembly includes a first positioning assembly and a second positioning assembly, and the first positioning assembly and the second positioning assembly are respectively disposed on the left bed of the milling machine. The right bed upper jaw device positioning assembly includes a third positioning assembly and a fourth positioning assembly, wherein the third positioning assembly and the fourth positioning assembly are respectively disposed on the right bed of the milling machine. In operation, the central control center controls the oil supply and drainage of the first and second positioning components to precisely position the upper jaw device on the left bed of the milling machine, and controls the oil supply and drainage of the third and fourth positioning components to precisely position the upper jaw device on the right bed of the milling machine. The first positioning component, the second positioning component, the third positioning component, and the fourth positioning component are all mechanical positioning and locking hydraulic devices suitable for stabilizing steel strip beveling milling as described in claim 3.

5. The mechanical positioning and locking hydraulic system for stabilizing the dimensions of steel strip beveling milling according to claim 4, characterized in that, The first positioning component and the second positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine. The third positioning component and the fourth positioning component are symmetrically arranged with respect to the transverse central axis of the milling machine. The first positioning component and the third positioning component are symmetrically arranged with respect to the longitudinal central axis of the milling machine.

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