A reversible mill anti-loose pressing down holding brake device

Abstract

The present application relates to a kind of reversible mill anti-loose pressure holding brake device, the device includes pneumatic brake assembly and pneumatic control component, wherein pneumatic control component includes: pneumatic triplex piece is installed between two-position five-way electromagnetic reversing valve and compressed air source, mainly plays the role of filtering, pressure stabilizing, oil mist lubrication;Two-position three-way electromagnetic reversing valve is connected on the outlet normally open gas path of two-position five-way electromagnetic reversing valve;Fast exhaust valve and pressure relay P1 are installed between two-position three-way electromagnetic reversing valve and brake skin bag by pipeline, and the outlet normally closed gas path of two-position five-way electromagnetic reversing valve is connected with pressure relay P2 and fast exhaust valve, and is connected with skin bag by corresponding connecting hose, connector body.

Description

Technical Field

[0001] This invention relates to a brake device, specifically a reversible rolling mill anti-rebound loosening brake device, belonging to the field of hot continuous rolling technology. Background Technology

[0002] The main function of the rolling mill's mechanical reduction system is to quickly adjust the roll gap during no-load operation. It mainly includes a reduction motor, worm gear reducer, brake, reduction screw and nut, and thrust bearing device. The mechanical reduction device is installed on the rolling mill stand. The high-speed rotational motion of the motor is converted into linear motion of the screw via a worm gear mechanism and a screw-nut mechanism, thus adjusting the horizontal roll gap. Because reversible rolling mills have a fast rolling rhythm, the roll gap needs to be set quickly. Therefore, the lead angle of the worm gear must be relatively large. Taking the R2 rolling mill on Meigang's 1422 production line as an example, the lead angle of the worm gear is 19.018 degrees, which lacks self-locking capability. Therefore, after the roll gap is set, a special brake is needed to lock the worm gear to prevent changes in the roll gap during the moment of steel biting. The main working principle of the depressing brake is as follows: Under natural conditions, the spring force acts between the friction components of the brake, generating sufficient friction, and the brake is in a clamped state. To open it, the air bladder needs to be inflated, compressing the spring and opening the brake. The clamping torque of the brake is directly proportional to the spring force and the contact area between the friction components. In actual use, especially after a period of time, the clamping torque decreases due to spring deformation and friction plate wear, causing changes in the roll gap during steel rolling and affecting production. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by providing a reversible rolling mill anti-slip pressure brake device. This technical solution incorporates an emergency air circuit control device that automatically activates when brake slippage occurs, increasing the brake clamping torque and preventing slippage.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a reversible rolling mill anti-rebound loosening brake device, the device comprising a pneumatic brake assembly and a pneumatic control assembly, wherein the pneumatic control assembly comprises: a pneumatic triplet installed between a two-position five-way solenoid directional valve and a compressed air source, mainly serving the functions of filtering, pressure stabilizing, and oil mist lubrication; a two-position three-way solenoid directional valve connected to the normally open outlet air line of the two-position five-way solenoid directional valve; a quick exhaust valve and a pressure relay P1 installed via pipeline between the two-position three-way solenoid directional valve and the brake bladder; a pressure relay P2 and a quick exhaust valve connected to the normally closed outlet air line of the two-position five-way solenoid directional valve, and connected to the bladder via corresponding connecting hoses, connectors, and other accessories. An encoder mounted on the motor shaft is responsible for feeding back the motor rotation angle, and a magnetic scale on the lead screw is responsible for feeding back the roll gap change data.

[0005] The pneumatic brake assembly includes a rear end cover, a pressure bladder, a bladder seat, a bladder, a spring pressure plate, hexagon socket head cap screws, springs, spring seats, friction plates A and B, friction wheels, a housing, a splined shaft, and bolts. The splined shaft is mounted to the output shaft of the worm gear via a key and pressure plate, making them a single unit that rotates with the worm gear. The housing is fixed to the reducer housing. Two friction plates A and two friction plates B are installed inside the housing cavity, with their external splines meshing with the internal splines of the housing. The internal splines of the three friction wheels mesh with the external splines of the splined shaft. The rear end cover assembly consists of a spring seat, 72 springs, a spring pressure plate, etc., with the springs installed between the other two components. The bladder, bladder seat, pressure bladder, and rear end cover are installed in place using bolts. The hexagon socket head cap screws are connected to the threaded holes in the housing.

[0006] As an improvement of the present invention, the outer circle of the spline shaft is designed with a spline, and the inner hole is designed with a keyway.

[0007] As an improvement of the present invention, the housing is configured as a cylindrical structure with an inner spline for guidance in the inner hole, and several waist-shaped viewing holes are evenly distributed on the housing for observing the operation of the brake; the inner hole at the end of the housing connected to the reducer housing is designed with a platform for positioning the friction plate.

[0008] As an improvement of the present invention, the inner hole of the friction wheel is designed with an internal spline that matches the external spline of the spline shaft, and the contact area between the body of the friction wheel and the friction pad is designed with several notches, which mainly serve to dissipate heat, remove chips, and prevent deformation.

[0009] As an improvement of the present invention, one end face of friction plate A is designed with 6 chip removal grooves, and the outer circle is designed with spline teeth. Both end faces of friction plate B are designed with 6 chip removal grooves, and the outer circle is designed with spline teeth.

[0010] As an improvement of the present invention, the spring seat mainly serves to fix the spring, and one end face is designed with 72 circular positioning holes, each about 2mm deep and with an inner diameter 0.5mm larger than the outer diameter of the spring. Six ribs can increase the overall strength of the spring seat.

[0011] As an improvement of the present invention, the spring pressure plate serves to fix the spring and pre-compress the spring, and one end face of the spring seat is also designed with 72 positioning holes.

[0012] As an improvement of the present invention, one end face of the friction plate A is designed with 6 chip removal grooves, and the outer circle is designed with spline teeth. Both end faces of the friction plate B are designed with 6 chip removal grooves, and the outer circle is designed with spline teeth.

[0013] As an improvement of the present invention, the pressurizing bladder 107 is designed with three through holes, and the extended connector on the bladder 109 passes through the through holes.

[0014] The spring seat primarily serves to fix the spring. One end face is designed with 72 circular positioning holes, each approximately 2mm deep, with an inner diameter 0.5mm larger than the outer diameter of the spring. Six reinforcing ribs increase the overall strength of the spring seat.

[0015] As an improvement of the present invention, the spring pressure plate serves to fix the spring and pre-compress the spring, and one end face of the spring seat is also designed with 72 positioning holes.

[0016] As an improvement of the present invention, the installation of the pneumatic brake assembly mainly includes the following steps:

[0017] Step 1: Install the splined shaft onto the output shaft of the worm gear using a key and pressure plate, making them a single unit that rotates with the worm gear;

[0018] Step 2: The housing is bolted onto the gearbox housing of the worm gear reducer and fixed in place.

[0019] Step 3: Install the first friction plate A, with one side of the 6 chip removal grooves facing outwards and the plane in contact with the positioning platform of the inner hole of the housing. The external spline and the internal spline of the housing 117 mesh with each other.

[0020] Step 4: Install the first friction wheel, whose internal spline meshes with the external spline of the spline shaft;

[0021] Step 5: Install the first friction plate B, whose external splines mesh with the internal splines of the housing.

[0022] Step 6: Install the second friction wheel, the second friction plate B, the third friction wheel, and the second friction plate A, with the side with the six chip removal grooves facing inward. At this time, the three friction wheels can rotate with the spline shaft and the worm shaft, and the two friction plates B and the two friction plates A can move axially.

[0023] Step 7: Assemble the rear end cover assembly: Place the spring seat horizontally with the spring positioning holes facing upwards; place the 72 springs vertically into the spring positioning holes on the spring seat; cover the springs with the corresponding spring positioning holes on the spring pressure plate, and then install the bladder, bladder seat, pressurized bladder, and rear end cover in place using bolts.

[0024] Step 8: Flip the assembled rear end cover assembly 90 degrees and connect it to the threaded holes of the housing using hex bolts. After the hex bolts are tightened in place, the 72 springs are compressed, and the resulting elastic force acts on the two friction plates A, the two friction plates B, the three friction wheels, and between the housing and the spring seat. At this time, the entire brake is in a locked state, and the worm gear cannot rotate.

[0025] Compared with existing technologies, this invention has the following advantages: 1) This technical solution tracks data from the motor encoder and displacement sensors on the lead screw in real time. When the monitored value changes during the rolling process and exceeds the set value, the emergency air circuit is activated, and the backup airbag is inflated. This essentially increases the friction between the friction plate components, thereby improving the clamping torque of the brake; 2) This solution can ensure production by automatically activating the backup emergency air circuit; 3) This invention cleverly borrows the working principle of the brake, transforming the brake into a double-bladder structure, while optimizing the control air circuit. The added bladder does not function under normal circumstances. However, if brake slippage occurs, the backup bladder automatically inflates. The expansion force generated by the bladder significantly increases the friction between the friction plate components, thereby increasing the clamping torque of the brake. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2-1 — Figure 2-3 This is a schematic diagram of the casing;

[0028] Figure 3-1 — Figure 3-3 This is a schematic diagram of a spring seat;

[0029] Figure 4-1 — Figure 4-3 This is a schematic diagram of a spring pressure plate;

[0030] Figure 5-1 — Figure 5-3 This is a schematic diagram of a pressure-boosting bladder.

[0031] Figure 6-1 — Figure 6-3 A schematic diagram of the skin;

[0032] Figure 7-1 — Figure 7-3 Schematic diagram of a spline shaft;

[0033] Figure 8-1 — Figure 8-3 This is a schematic diagram of a friction wheel;

[0034] Figure 9-1 — Figure 9-2 This is a schematic diagram of friction plate A;

[0035] Figure 10 This is a schematic diagram of friction plate B;

[0036] Figure 11-1 — Figure 11-3 A schematic diagram of the skin seat;

[0037] In the diagram: 101-Compressed air source, 102-Pneumatic triplet, 103-Two-position five-way solenoid directional valve, 104-Quick exhaust valve, 105-Proportional two-position three-way solenoid directional valve, 106-Rear end cover, 107-Pressure bladder, 108-Blade seat, 109-Blade, 110-Spring pressure plate, 111-Hex socket head cap bolt, 112-Spring, 113-Spring seat, 114-Friction plate A, 115-Friction plate B, 116-Friction wheel, 117-Housing, 118-Splined shaft, 119-Bolt. Detailed Implementation

[0038] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0039] Example 1: See Figures 1-11-3A reversible rolling mill anti-reverse loosening brake device is disclosed. The device includes a pneumatic brake assembly and a pneumatic control assembly. The pneumatic control assembly includes: a pneumatic triplet 102 installed between a two-position five-way solenoid valve 103 and a compressed air source 101, primarily for filtering, pressure stabilization, and oil mist lubrication; a two-position three-way solenoid valve 105 connected to the normally open outlet air line of the two-position five-way solenoid valve 103; a quick exhaust valve 104 and a pressure relay P1 installed via pipelines between the two-position three-way solenoid valve 105 and the brake bladder 109; a pressure relay P2 and the quick exhaust valve 104 connected to the normally closed outlet air line of the two-position five-way solenoid valve 103, and connected to the pressure bladder 107 via corresponding connecting hoses, connectors, and other accessories. A encoder mounted on the motor shaft provides feedback on the motor rotation angle, and a magnetic scale on the lead screw provides feedback on roll gap changes. The pneumatic brake assembly includes a rear end cover 106, a pressure bladder 107, a bladder seat 108, a bladder 109, a spring pressure plate 110, an internal hex bolt 111, a spring 112, a spring seat 113, friction plates A 114, friction plates B 115, a friction wheel 116, a housing 117, a splined shaft 118, and bolts 119. The splined shaft 118 is mounted to the output shaft of the worm gear via a key and a pressure plate, making them a single unit that rotates with the worm gear. The housing 117 is fixed to the gearbox housing. Two friction plates A 114 and two friction plates B... Friction plate 115 is installed inside housing 117, with its external spline meshing with the internal spline of housing 117; the internal splines of three friction wheels 116 mesh with the external splines of spline shaft 118; the rear end cover assembly consists of spring seat 113, 72 springs 112, spring pressure plate 110, etc., with springs 112 installed between the other two; bladder 109, bladder seat 108, pressurizing bladder 107, and rear end cover 106 are installed in place by bolts 119; hexagonal socket head cap bolts 111 are connected to the threaded holes of housing 117; the spline shaft 118 has a ring of splines on its outer circumference and a keyway in its inner hole. Friction plate A 114 has 6 chip removal grooves on one end face and spline teeth on its outer circumference; friction plate B 115 has 6 chip removal grooves on both end faces and spline teeth on its outer circumference. The housing 117 is a cylindrical structure with an inner spline for guidance. Several waist-shaped inspection holes are evenly distributed on the housing for observing the brake's operation. A platform is designed in the inner hole at the end of the housing 117 that connects to the reducer housing to position the friction plates. The friction wheel 116 has an inner spline that mates with the external spline of the splined shaft 118. Several notches are designed at the contact points between the friction wheel 116 and the friction plates, primarily for heat dissipation, chip removal, and preventing deformation.

[0040] Reference Figure 9-1 —9-2, the friction plate A 114 has 6 chip removal grooves on one end face and spline teeth on the outer circle.

[0041] Reference Figure 10 The friction plate B 115 has six chip removal grooves on both ends and spline teeth on its outer circumference.

[0042] The pressurized bladder 107 is designed with three through holes, and the extended connector on the bladder 109 passes through the through holes.

[0043] The installation of the pneumatic brake assembly mainly involves the following steps:

[0044] Step 1: Install the splined shaft 118 onto the output shaft of the worm gear using a key and a pressure plate, making them a single unit that rotates with the worm gear;

[0045] Step 2: The housing 117 is bolted onto the gearbox housing of the worm gear reducer and fixed in place.

[0046] Step 3: Install the first friction plate A 114, with the chip removal groove facing outward and the plane in contact with the positioning platform inside the housing 117, and the external spline meshing with the internal spline of the housing 117;

[0047] Step 4: Install the first friction wheel 116, whose internal spline meshes with the external spline of the spline shaft 118;

[0048] Step 5: Install the first friction plate B 115, whose external splines mesh with the internal splines of the housing 117.

[0049] Install the second friction wheel 116, the second friction plate B 115, the third friction wheel 116, and the second friction plate A114 (with the side with the 6 chip removal grooves facing inward). At this time, the three friction wheels 116 can rotate with the spline shaft 118 and the worm shaft, and the two friction plates B 115 and the two friction plates A 114 can move axially.

[0050] Step 7: Assemble the rear end cover assembly: Place the spring seat 113 horizontally with the spring positioning holes facing upwards; place the 72 springs 112 vertically into the spring positioning holes on the spring seat 113; cover the springs 112 with the spring positioning holes on the spring pressure plate 110, and then install the bladder 109, bladder seat 108, pressure bladder 107, and rear end cover 106 into place using bolts 119; Step 8: Rotate the assembled rear end cover assembly 90 degrees and connect it to the threaded holes of the housing 117 using hexagonal socket head cap screws 111. After the hexagonal socket head cap screws 111 are tightened in place, the 72 springs 112 are compressed, and the resulting elastic force acts on the two friction plates A 114, the two friction plates B 115, the three friction wheels 116, and between the housing 117 and the spring seat 113. At this time, the entire brake is in a locked state, and the worm gear cannot rotate.

[0051] Installation and operation process: See Figures 1-11-3Taking the R2 pressing worm gear on Meigang 1422 production line as an example, the number of worm threads is 3, the number of worm wheel teeth is 43, the screw thread pitch is 50mm, the change in roll gap corresponding to each rotation of the motor is approximately 3.488mm (50*3 / 43), and the corresponding motor encoder feedback is 360 degrees.

[0052] Reference Figure 1 When the coil YH1A of the two-position five-way solenoid directional valve 103 and the coil YH2A of the proportional two-position three-way solenoid directional valve 105 are both de-energized, no air enters the bladder, the pressure relays P1 and P2 both show zero, and the brake is in a locked state. When the roll gap is set, the coil YH2A is energized, the two-position three-way solenoid directional valve 105 switches, compressed air enters the bladder 109 through the quick exhaust valve 104 and inflates it. The expansion force generated by the bladder 109 overcomes the total elastic force of the spring 112, compressing the spring, the friction wheel 116 separates from the friction plate, and the brake is released.

[0053] To prevent air leakage in the pipeline from causing the brake to be in a semi-engaged state, which would damage the friction plates, the motor is not allowed to start when the pressure relay P1 is below the minimum set value. Therefore, the motor is allowed to start only when P1 > 5.0 bar. The worm gear moves and drives the lead screw to move up or down. When the lead screw displacement sensor reaches the set value, the motor stops, and at the same time, the coil YH2A of the two-position three-way solenoid valve 105 is de-energized and reverses. The compressed air in the bladder 109 is quickly vented through the quick exhaust valve 104, and the brake locks.

[0054] Under normal rolling conditions, the displacement sensors on the motor encoder and lead screw do not provide feedback data.

[0055] After a period of use, due to the decrease in the elasticity of spring 112 and the wear of the friction plates and friction wheels, the clamping torque of the brake decreases. At the moment of engagement, the brake slips. The displacement sensors on the motor encoder and lead screw will successively send data feedback to the back-end computer. When the feedback value from the motor encoder reaches 10 degrees (this can be set according to actual needs; a smaller value results in a faster response), the coil YH2A of the two-position five-way solenoid valve 103 is energized and reverses direction. The pressure relay P2 displays a pressure of approximately 5.0-5.5 bar, and the pressure bladder 107 rapidly expands. The resulting thrust acts sequentially on the rear cover 106, bladder seat 108, spring seat 113, friction plates, and friction wheels, increasing the brake clamping torque and preventing slippage. According to calculations, when the pressure of the brake's pressure bladder reaches 5 bar, the brake clamping torque increases by approximately 1.2 times.

[0056] By taking the above measures, the defects described in the background description were avoided and the beneficial effects described in the invention were successfully achieved.

[0057] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A reversible rolling mill anti-rebound loosening brake device, characterized in that, The device includes a pneumatic brake assembly and a pneumatic control assembly. The pneumatic control assembly includes: a pneumatic triplet installed between a two-position five-way solenoid valve and a compressed air source, mainly for filtering, stabilizing pressure, and lubricating with oil mist; a two-position three-way solenoid valve connected to the normally open outlet air line of the two-position five-way solenoid valve; a quick exhaust valve and pressure relay P1 installed between the two-position three-way solenoid valve and the brake bladder via pipelines; and a pressure relay P2 and a quick exhaust valve connected to the normally closed outlet air line of the two-position five-way solenoid valve, and connected to the bladder via corresponding connecting hoses and connectors. The pneumatic brake assembly includes a rear end cover, a pressure bladder, a bladder seat, a bladder, a spring pressure plate, hexagon socket head cap screws, springs, a spring seat, friction plates A and B, friction wheels, a housing, a splined shaft, and bolts. The splined shaft is mounted to the output shaft of the worm gear via a key and pressure plate, making them a single unit that rotates with the worm gear. The housing is fixed to the reducer housing. Two friction plates A and two friction plates B are installed inside the housing cavity, with their external splines meshing with the internal splines of the housing. The internal splines of the three friction wheels mesh with the external splines of the splined shaft. The rear end cover assembly consists of a spring seat, 72 springs, and a spring pressure plate, with the springs installed between the spring seat and the spring pressure plate. The bladder, bladder seat, pressure bladder, and rear end cover are installed in place by bolts. The hexagon socket head cap screws are connected to the threaded holes in the housing. When the coil YH1A of the two-position five-way solenoid directional valve and the coil YH2A of the proportional two-position three-way solenoid directional valve are de-energized, no air enters the bladder, the pressure relays P1 and P2 both show zero, and the brake is in a locked state. When the roll gap is set, coil YH2A is energized, the two-position three-way solenoid directional valve switches, compressed air enters the bladder through the quick exhaust valve and inflates it, the expansion force generated by the bladder overcomes the total elastic force of the spring and compresses the spring, the friction wheel separates from the friction plate, and the brake opens. When the coil YH2A of the two-position three-way solenoid directional valve is de-energized and reverses, the compressed air in the bladder is rapidly vented through the quick-release valve, causing the brake to lock. When brake slippage occurs, the coil YH1A of the two-position five-way solenoid valve is energized and reversed. The pressure relay P2 displays a pressure of 5.0-5.5 bar. The pressurized bladder inflates and expands, and the resulting thrust is applied sequentially to the rear cover, bladder seat, spring seat, friction plate, and friction wheel. The brake clamping torque increases, preventing brake slippage.

2. The reversible rolling mill anti-rebound loosening brake device according to claim 1, characterized in that, The splined shaft has a spline on its outer circumference and a keyway on its inner hole.

3. The reversible rolling mill anti-rebound loosening brake device according to claim 2, characterized in that, The housing is configured as a cylindrical structure with an inner spline for guidance. Several waist-shaped viewing holes are evenly distributed on the housing for observing the operation of the brake. A platform is designed in the inner hole at the end of the housing that connects to the reducer housing for positioning the friction plate.

4. The reversible rolling mill anti-rebound loosening brake device according to claim 3, characterized in that, The inner hole of the friction wheel is designed with an internal spline that matches the external spline of the spline shaft, and the contact area between the body of the friction wheel and the friction plate is designed with a notch.

5. The reversible rolling mill anti-rebound loosening brake device according to claim 4, characterized in that, Friction plate A has 6 chip removal grooves on one end face and spline teeth on the outer circle. Friction plate B has 6 chip removal grooves on both end faces and spline teeth on the outer circle.

6. The reversible rolling mill anti-reverse loosening brake device according to claim 5, characterized in that, The pressurized bladder is designed with three through holes, through which the extended connector on the bladder passes.

7. The reversible rolling mill anti-rebound loosening brake device according to claim 1, characterized in that, The installation of the pneumatic brake assembly mainly involves the following steps: Step 1: Install the splined shaft onto the output shaft of the worm gear using a key and pressure plate, making them a single unit that rotates with the worm gear; Step 2: The housing is bolted onto the gearbox housing of the worm gear reducer and fixed in place. Step 3: Install the first friction plate A, with one side of the 6 chip removal grooves facing outwards and the plane in contact with the positioning platform of the inner hole of the housing, and the external spline teeth meshing with the internal spline of the housing; Step 4: Install the first friction wheel, whose internal spline meshes with the external spline of the spline shaft; Step 5: Install the first friction plate B, whose external splines mesh with the internal splines of the housing; Step 6: Install the second friction wheel, the second friction plate B, the third friction wheel, and the second friction plate A; Step 7: Assemble the rear end cover assembly: Place the spring seat horizontally with the spring positioning holes facing upwards; place the 72 springs vertically into the spring positioning holes of the spring seat; align the spring positioning holes on the spring pressure plate with the springs, and then install the bladder, bladder seat, pressurized bladder, and rear end cover into place using bolts. Step 8: Flip the assembled rear end cover assembly 90 degrees and connect it to the threaded hole of the housing through the hex bolts. After the hex bolts are tightened in place, the 72 springs have been compressed. The resulting elastic force acts on the two friction plates A, the two friction plates B, the three friction wheels, and between the housing and the spring seat. At this time, the entire brake is in a locked state and the worm gear cannot rotate.

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