CN115055519A - Roughing mill with reliable locking function - Google Patents
Roughing mill with reliable locking function Download PDFInfo
- Publication number
- CN115055519A CN115055519A CN202210557812.0A CN202210557812A CN115055519A CN 115055519 A CN115055519 A CN 115055519A CN 202210557812 A CN202210557812 A CN 202210557812A CN 115055519 A CN115055519 A CN 115055519A
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- Prior art keywords
- oil
- roughing mill
- mill
- piston
- hydraulic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
Abstract
A roughing mill with reliable locking function comprises a roughing mill body and a base, wherein the rolling mill comprises a base, a mill stand, a first roller and a second roller, and the first roller and the second roller are supported on the mill stand; a guide rail is arranged on the base, and the rolling mill frame is arranged in the guide rail in a sliding manner; additionally arranging long-stroke hydraulic locking devices which are respectively arranged on the base and at the two sides of the front and rear rolling stands; the long-stroke hydraulic locking device is provided with an oil cylinder body and a hydraulic cylinder piston arranged in the oil cylinder body, and a piston rod of the hydraulic cylinder piston is used as a jacking rod and is propped against the corresponding inner inclined surface of the groove of the rolling mill frame. The invention adjusts the position of the rolling mill on the stand by locking and unlocking to realize the purpose of quickly replacing the roll groove to meet the production requirement, and the hydraulic control one-way valve, the pressure maintaining piston and the spring are matched for use, so that the pressure in the oil cylinder can be compensated when oil leaks from oil pipes, oil cylinders and the like, and the locking of the roughing mill is ensured.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a roughing mill with a locking function.
Background
When the roughing mill works, a roller groove on a roller is seriously abraded after being used for a period of time, a produced product is unqualified, another roller groove on the roller needs to be replaced to work, the roller is fixedly arranged on a rolling mill frame, and the position of the roughing mill on a base needs to be integrally moved when different roller grooves are changed, so that the roughing mill is inconveniently fixed on the base, the position of the roughing mill on the base is conveniently and quickly adjusted and locked by using a long-stroke hydraulic locking device, however, if the locking fails, the roughing mill shakes or topples over, unqualified products are produced if the locking fails, the situation of machine damage and human injury is caused if the locking fails, and the production cannot normally run; the long-stroke hydraulic locking device is a hydraulic actuating element which converts hydraulic energy into mechanical energy and enables a piston to do linear reciprocating motion, does not need to be additionally provided with a speed reducer, has no transmission gap, is stable and reliable in motion and simple in structure, and can be widely applied to various mechanical hydraulic systems; the existing locking device completely utilizes oil pressure to push the piston to lock, the stroke of the locking device is long and reaches 90mm, an oil pipe pipeline connected between the locking device and the control valve is long, the oil pressure in an oil cylinder of the long-stroke hydraulic locking device is reduced due to the fact that the oil pipe pipeline leaks, the control valve leaks, the oil cylinder leaks and the like in the using process, the piston moves, and the locking failure is caused, so that the locking problem of a roughing mill must be solved.
Disclosure of Invention
The invention aims to provide a roughing mill with a reliable locking function, which can avoid the problem of locking failure caused by displacement of a piston rod due to pressure reduction in an oil cylinder caused by leakage of an oil pipe, a control valve, the oil cylinder and the like, can realize quick locking and unlocking of the roughing mill, and improves the locking reliability.
The purpose of the invention is realized by the following technical scheme:
a roughing mill with reliable locking function comprises a roughing mill body and a base, wherein the roughing mill body comprises a mill stand, a first roller and a second roller, and the first roller and the second roller are supported on the mill stand; the base is provided with a guide rail, and the rolling mill frame is arranged in the guide rail in a sliding manner; the rolling mill is characterized in that four long-stroke hydraulic locking devices are additionally arranged and are respectively arranged on the two sides of a front rolling mill frame and a rear rolling mill frame on a base; the long-stroke hydraulic locking device is provided with an oil cylinder body and a hydraulic cylinder piston arranged in the oil cylinder body, a piston rod of the hydraulic cylinder piston is used as a tightening rod, the end part of the piston rod is an inclined plane and is tightly pressed on an inclined plane in a groove corresponding to a rolling mill frame, and the oil cylinder body is fixed on the base.
According to the roughing mill with the reliable locking function, the pressure maintaining piston is arranged at the left end of the cylinder body of the oil cylinder, the pressure maintaining piston rod is arranged on the left end face of the pressure maintaining piston, and the spring is sleeved on the pressure maintaining piston rod; the oil cylinder body is provided with a first oil inlet and a second oil inlet, the first oil inlet and the second oil inlet are respectively arranged on two sides of the hydraulic cylinder piston, and the first oil inlet is positioned on the right side of the pressure maintaining piston; the left end and the right end of the cylinder body of the oil cylinder are respectively sealed by a rear end cover and a front end cover, a piston rod of the oil cylinder penetrates through a center hole of the front end cover, and a sealing element is arranged between the piston rod and the center hole.
According to the roughing mill with the reliable locking function, the first oil inlet is provided with the hydraulic control one-way valve, one oil port of the hydraulic control one-way valve is connected with the first oil supply pipe, the other oil port of the hydraulic control one-way valve is communicated with the first oil inlet, the control oil port of the hydraulic control one-way valve is connected with the control oil pipe, the second oil inlet of the oil cylinder body is connected with one pipe opening of the tee joint, and the other two pipe openings are respectively connected with the control oil pipe and the second oil supply pipe.
The roughing mill with the reliable locking function is additionally provided with the hydraulic control loop, the hydraulic control loop comprises the electromagnetic directional valve DCF, an A port of the electromagnetic directional valve DCF is connected with an oil port of the hydraulic control one-way valve, a B port of the electromagnetic directional valve DCF is connected with a pipe orifice of the tee joint, an oil supply port P is connected with the oil pump, an oil return port T is communicated with the oil tank, and the electromagnetic directional valve DCF adopts a middle position function Y type.
According to the roughing mill with the reliable locking function, the diameter of the pressure maintaining piston is larger than that of the hydraulic cylinder piston.
According to the roughing mill with the reliable locking function, the right end of the piston rod of the hydraulic cylinder is provided with the guide pin, the guide pin is matched with the guide groove formed in the base, the movement of the piston rod of the hydraulic cylinder is limited, and lateral deviation is prevented.
In the above roughing mill with reliable locking function, the bevel angle α of the wedge-shaped face is 30 ° -45 °, and the angle of the bevel in the corresponding groove on the mill housing is the same as that.
According to the roughing mill with the reliable locking function, the spacer is arranged on the left end face of the hydraulic cylinder piston, and the thickness of the spacer is slightly larger than the diameter of the first oil inlet.
The roughing mill with the reliable locking function is provided with the exhaust channel at the rear end cover, and the exhaust hole and the plug screw are arranged in the center of the rear end cover.
According to the roughing mill with the reliable locking function, the lining is arranged on the rear end cover, and the inner diameter of the lining is matched with the outer diameter of the pressure maintaining piston rod.
Advantageous effects
The invention can quickly adjust the position of the roughing mill on the stand, and the locking and unlocking operations are convenient, thereby being capable of quickly replacing different roller grooves on the roller, reducing the roller changing time and improving the production efficiency. By utilizing the matching of the hydraulic control one-way valve, the return spring and the pressure maintaining piston, oil pressure compensation can be timely performed under the condition that oil leaks in oil pipes, oil cylinders and the like, the locking of the locking device on the rolling mill in the stroke of 50-200mm is ensured, and rolling quality accidents caused by the loosening of the rolling rolls are avoided; the locking rod is provided with the guide pin which is matched with the guide of the guide groove, so that the unstable locking state caused by the deviation of the piston rod of the hydraulic cylinder can be prevented, and the roller can be locked more reliably.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic structural diagram of a long-stroke hydraulic locking device.
In the drawings, the reference numerals denote: 1. the hydraulic control device comprises a rear end cover, 2, a bushing, 3, a spring, 4, a pressure maintaining piston, 5, a hydraulic control one-way valve, 6, a control oil pipe, 7, a first oil supply pipe, 8, a second oil supply pipe, 9, a guide pin, 10, a hydraulic cylinder piston, 11, a wedge-shaped surface, 12, a cylinder body, 13, a front end cover, 14, a base, 15, a rolling mill frame, 16, a guide groove, 17, a first roller, 18, a second roller, 19, a roller groove, 20, a pressure maintaining piston rod, 21, a hydraulic cylinder piston rod, 23, a first oil inlet, 24, a second oil inlet, 25, an oil tank, 26, an oil pump, 27, a tee joint, 28, an exhaust passage, 29, an exhaust hole + plug screw, 30, a fixing bolt, 31, a spacer, 32, an upper pipe opening, 33, an upper oil opening, DCF and an electromagnetic reversing valve.
Detailed Description
With reference to fig. 1, 2 and 3, the present invention relates to an improved roughing mill comprising a roughing mill body and a stand 14, said roughing mill body comprising a mill housing 15, a first roll 17 and a second roll 18, said first roll 17 and second roll 18 constituting a rolling die of the roughing mill. According to the invention, a long-stroke hydraulic locking device is fixed on a base, an oil cylinder body 12 is arranged in the long-stroke hydraulic locking device, a hydraulic cylinder piston 10 is arranged in the oil cylinder body, a hydraulic cylinder piston rod 21 is arranged on the right end face of the hydraulic cylinder piston 10, the end face of the hydraulic cylinder piston rod 21 is designed into a wedge-shaped face 11, and the wedge-shaped face is matched with an inclined face arranged on the base, so that a rolling mill frame 15 can be locked on the base.
In actual operation, because oil pipes, oil cylinders and the like inevitably leak, which inevitably affects the locking of the rolling mill in the stroke of 50-200mm, the invention is provided with the lengthened oil cylinder body 12, the pressure maintaining piston 4 is additionally arranged in the oil cylinder body 12, and the return spring 3 is arranged on the pressure maintaining piston 4 and is used for providing continuous pressure required by the pressure maintaining piston. The spring can adopt a disc spring, a coil spring and the like, and when the oil pressure in the pipeline is reduced, the reset force of the spring can provide oil pressure compensation.
The diameter of the pressure maintaining piston is larger than that of the hydraulic cylinder piston, so that a larger pushing force can be provided on the right end face of the pressure maintaining piston 4 during pressure maintaining, and a larger pushing force is generated on the hydraulic cylinder piston 10, so that the hydraulic cylinder piston can adapt to oil leakage of different degrees. Because the diameter of the pressure maintaining piston is larger, the inner diameter of the corresponding part in the oil cylinder body 12 is also larger, the inner diameter of the step just provides the limit of the pressure maintaining piston, and an assembly space is reserved for the first oil inlet 23. In addition, a spacer 31 is provided at the left end face of the cylinder piston 10 in order to leave a passage for oil from the first oil inlet 23 between the cylinder piston 10 and the pressure-maintaining piston 4.
The rear end cover 1 of the invention is arranged at the left end of the oil cylinder body 12 and seals the left end of the oil cylinder body 12. The cylinder body 12 is provided with a first oil inlet 23 and a second oil inlet 24, and the first oil inlet 23 and the second oil inlet 24 are respectively arranged on two sides of the hydraulic cylinder piston 10 and are on the right side of the pressure maintaining piston 4. The first oil inlet 23 is connected with a hydraulic control one-way valve 5, two oil ports of the hydraulic control one-way valve 5 are respectively communicated with a first oil supply pipe 7 and a control oil pipe 6, the other end of the control oil pipe 6 is connected with a tee 27, and the other two pipe orifices of the tee are respectively connected with a second oil inlet 24 and a second oil supply pipe 8 of the oil cylinder body 12.
The hydraulic cylinder piston rod 21 of the invention penetrates through the front end cover 13, and the front end cover 13 is arranged on the right end face of the cylinder body 12 and is sealed with the cylinder body 12 and the hydraulic cylinder piston rod 21.
When the locking operation is carried out, the first oil supply pipe 7 feeds oil to the upper oil port 33 of the hydraulic control one-way valve 5, the valve core is pushed to the left side by pressure oil, the upper oil port 33 is communicated with the lower oil port (communicated with the first oil inlet 23), when the upper pipe orifice 32 feeds oil, the pressure oil simultaneously enters the lower pipe orifice (communicated with the second oil inlet 24) and the control oil pipe 6, the pressure oil in the control oil pipe 6 pushes the valve core, the valve core moves leftwards, and the upper oil port 33 is communicated with the lower oil port (communicated with the first oil inlet 23). At the moment, the hydraulic oil pushes the pressure maintaining piston 4 to move leftwards, the spring 3 is compressed, the hydraulic cylinder piston 10 moves rightwards, and the hydraulic cylinder piston rod 21 moves rightwards to compress the rolling mill frame 15. When the pressure in the cylinder barrel of the oil cylinder reaches a specified value, the first oil supply pipe 7 stops supplying oil, the hydraulic control one-way valve 5 is closed, and the hydraulic oil is locked in the cylinder body 12 of the oil cylinder. If the oil leakage phenomenon occurs, the spring 3 extends to push the pressure maintaining piston 4 to move rightwards to perform pressure maintaining locking; during unlocking, the second oil supply pipe 8 supplies oil to the control oil pipe 6 and the second oil inlet 24, the hydraulic control one-way valve 5 is opened, hydraulic oil flows out of the first oil supply pipe 7 from the first oil supply port 23 through the hydraulic control one-way valve 5, the hydraulic cylinder piston 10 drives the hydraulic cylinder piston rod 21 to move leftwards, the pressure maintaining piston 4 moves rightwards, and unlocking is successful.
Referring to fig. 1, a guide pin 9 is arranged on the part of the hydraulic cylinder piston rod 21 exposed out of the front end cover 13, and the guide pin 9 is cylindrical, so that the guide pin can conveniently slide in a guide groove, and the condition that the direction of the inclined surface of the hydraulic cylinder piston rod is changed and cannot be matched with the inclined surface of the rolling mill frame due to rotation of the hydraulic cylinder piston rod is avoided.
Referring to fig. 1 and 2, the end face of the piston rod 21 of the hydraulic cylinder of the present invention is provided with a wedge-shaped surface 11, and the bevel angle alpha is 30 degrees to 45 degrees, which is not only beneficial for the wedge-shaped surface to be inserted with a small pressure, but also can ensure the stable and reliable compression state.
Referring to fig. 1 to 3, the first roll 17 and the second roll 18 are disposed on a rolling stand 15, the rolling stand 15 is disposed on a base 14, a guide groove 16 is disposed on the base 14, the number of the long-stroke hydraulic locking devices is four, the long-stroke hydraulic locking devices are respectively mounted on two sides of the base 14, two are disposed on each side of the base, the long-stroke hydraulic locking devices are mounted on two sides of a symmetry axis of the rolling stand, a guide pin 9 on a hydraulic cylinder piston rod 21 is disposed in the guide groove 16, a wedge surface of the hydraulic cylinder presses an inclined surface of the base, the four locking cylinders on the two sides simultaneously press the inclined surface of the base, so that the freedom degree of the rolling stand in each direction is limited, and the rolling stand does not shake when rolling billets.
Referring to fig. 1 and 2, the bottom of the rolling stand 15 is provided with an inclined plane, and the angle β of the inclined plane is equal to the angle α of the wedge-shaped surface 11, so as to ensure the contact of the pressing contact surfaces.
The hydraulic control part of the invention uses a three-position four-way electromagnetic directional valve DCF with Y-shaped function at the middle position, the oil supply port P of the valve is connected with an oil pump 26, the oil return port T of the valve is communicated with an oil tank 25, and the working port A and the working port B of the valve are respectively communicated with a first oil supply pipe 7 and a second oil supply pipe 8. When the electromagnetic directional valve DCF is in the middle position, the oil supply port P is closed, the working port A, B is communicated with the oil return port T, and the electromagnetic directional valve is in a floating state and can move along with the action of external force; when the valve core moves to the right position, the oil supply port P is communicated with the working port A, the oil return port T is communicated with the working port B, so that the hydraulic cylinder piston 10 moves rightwards, and the locking operation is completed; when the valve core moves to the left position, the oil supply port P is communicated with the working port B, and the oil return port T is communicated with the working port A, so that the hydraulic cylinder piston 10 moves leftwards, and the unlocking operation is completed.
Claims (10)
1. Roughing mill with positive locking function comprising a roughing mill body and a stand (14), said roughing mill body comprising a roll stand (15), a first roll (17) and a second roll (18), said first roll (17) and second roll (18) being supported on the roll stand (15), characterized in that: a guide rail is arranged on the base, and the rolling mill frame (15) is arranged in the guide rail in a sliding manner; the rolling mill is characterized in that four long-stroke hydraulic locking devices are additionally arranged and are respectively arranged on the two sides of the front rolling mill frame and the rear rolling mill frame on the base; the long-stroke hydraulic locking device is provided with an oil cylinder body (12) and a hydraulic cylinder piston (10) arranged in the oil cylinder body, a piston rod of the hydraulic cylinder piston (10) is used as a tightening rod, the end part of the piston rod is an inclined surface and is tightly pressed on an inclined surface in a corresponding groove of a rolling mill frame (15), and the oil cylinder body (12) is fixed on a base (14).
2. The roughing mill with reliable locking function according to claim 1, characterized in that the left end of the cylinder body (12) is provided with a pressure maintaining piston (4), the left end face of the pressure maintaining piston (4) is provided with a pressure maintaining piston rod (20), and the pressure maintaining piston rod (20) is sleeved with a spring (3); a first oil inlet (23) and a second oil inlet (24) are formed in the oil cylinder body (12), the first oil inlet (23) and the second oil inlet (24) are respectively formed in two sides of the hydraulic cylinder piston (10), and the first oil inlet (23) is located on the right side of the pressure maintaining piston (4); the left end and the right end of the oil cylinder body (12) are respectively sealed by a rear end cover (1) and a front end cover (13), a piston rod (21) of the hydraulic cylinder penetrates through a center hole of the front end cover (13), and a sealing element is arranged between the piston rod and the center hole.
3. The roughing mill with reliable locking function according to claim 1, characterized in that a pilot operated check valve (5) is arranged at the first oil inlet (23), one oil port of the pilot operated check valve (5) is connected to the first oil supply pipe (7), the other oil port of the pilot operated check valve is communicated with the first oil inlet (23), the control oil port of the pilot operated check valve (5) is connected to the control oil pipe (6), the second oil inlet (24) of the cylinder body (12) is connected to one pipe port of the tee joint (27), and the other two pipe ports are respectively connected to the control oil pipe (6) and the second oil supply pipe (8).
4. The roughing mill with reliable locking function according to claim 1 is characterized in that a hydraulic control loop is added, the hydraulic control loop comprises a solenoid directional valve DCF, an opening A of the solenoid directional valve DCF is connected with an oil port of a hydraulic control one-way valve (5), an opening B of the solenoid directional valve DCF is connected with an opening of a tee joint (27), an oil supply opening P of the solenoid directional valve DCF is connected with an oil pump (26), an oil return opening T of the solenoid directional valve DCF leads to an oil tank (25), and the solenoid directional valve DCF is of a middle position function Y type.
5. Roughing mill with positive locking function according to claim 1 characterized in that the diameter of the holding pressure piston (4) is larger than the diameter of the hydraulic cylinder piston (10).
6. Roughing mill with positive locking function according to claim 1, characterized in that the right end of the hydraulic cylinder piston rod (21) is provided with a guide pin (9), the guide pin (9) matching with a guide groove provided on the base (4) limiting the movement of the hydraulic cylinder piston rod (21) against lateral deviation.
7. Roughing mill with positive locking function according to claim 1, characterized in that the bevel angle α of said wedge-shaped face (11) is 30 ° -45 °, the angle of the corresponding in-groove bevel on the mill housing (15) being the same.
8. Roughing mill with reliable locking function according to claim 1, characterized in that on the left end face of the hydraulic cylinder piston (10) a spacer (31) is provided, the thickness of the spacer (31) being slightly greater than the diameter of the first oil inlet (23).
9. Roughing mill with positive locking function according to claim 1, characterised in that the rear end cap (1) is provided with venting ducts (28) and in the centre of the rear end cap (1) is provided with venting holes + screw plugs (29).
10. Roughing mill with positive locking function according to claim 1 characterized in that on the rear end cap (1) a bushing (2) is provided, the inner diameter of said bushing (2) matching the outer diameter of the pressure maintaining piston rod (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210557812.0A CN115055519A (en) | 2022-05-19 | 2022-05-19 | Roughing mill with reliable locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210557812.0A CN115055519A (en) | 2022-05-19 | 2022-05-19 | Roughing mill with reliable locking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115055519A true CN115055519A (en) | 2022-09-16 |
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ID=83198561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210557812.0A Pending CN115055519A (en) | 2022-05-19 | 2022-05-19 | Roughing mill with reliable locking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115055519A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213467A (en) * | 2023-03-09 | 2023-06-06 | 中国机械总院集团北京机电研究所有限公司 | Die clamping mechanism and roll forging machine |
-
2022
- 2022-05-19 CN CN202210557812.0A patent/CN115055519A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213467A (en) * | 2023-03-09 | 2023-06-06 | 中国机械总院集团北京机电研究所有限公司 | Die clamping mechanism and roll forging machine |
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