CN213704669U

CN213704669U - Adjustable stroke brake device of hot die forging press

Info

Publication number: CN213704669U
Application number: CN202022103359.5U
Authority: CN
Inventors: 谢皓; 李朝金; 张继雄; 史晓戈; 邹泉; 安青华; 彭春云
Original assignee: Wuhan Heavy Industry Casting and Forging Co Ltd
Current assignee: Wuhan Heavy Industry Casting and Forging Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-07-16
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses an adjustable stroke arresting gear of hot die forging press has solved the friction disc that current arresting gear exists and has changed the problem that frequently influences the work efficiency of hot die forging press. The technical scheme includes that the brake pump comprises a brake pump shell, a brake disc and a crankshaft, wherein the rear end of the brake pump shell is installed on a machine body, the outer peripheral surface of the brake pump shell is meshed with the inner wall of the brake pump shell, the crankshaft is fixedly sleeved with a brake disc, the radial peripheral portion of the brake disc is provided with a brake groove hole, a friction plate is arranged in the brake groove hole and located between the brake disc and the end face of the brake pump shell, the thickness of the friction plate is larger than that of the brake disc, and the front end of the brake pump shell is connected with a cylinder. The utility model discloses simple structure, be convenient for loading and unloading and maintenance, effectively improve hot die forging press work efficiency height, do not need long-time shut down to change friction piece, the safety and stability is good.

Description

Adjustable stroke brake device of hot die forging press

Technical Field

The utility model relates to a hot mould forging and pressing field, specific adjustable stroke arresting gear of hot die forging press that says so.

Background

In recent years, the automobile industry in China is rapidly developed, and the automobile part matching industry is rapidly developed. How to ensure stable and efficient operation of equipment, reduce production cost and ensure product quality has become a competitive standard for enterprises. The hot die forging press is used as main production equipment of automobile forgings, a braking device of the hot die forging press runs ten thousand times every day, and the following problems exist in the design of the braking device caused by frequent braking:

frequent braking can result in the temperature of the braking device rising and serious friction plate loss. The brake stroke is increased along with the increase of the loss of the friction plate, so that the processing efficiency of equipment is influenced; the increase of the braking stroke can lead to the reduction of the braking torque of the compression spring and the increase of the braking time, and finally leads to the situation that the equipment cannot brake completely and influences the workpiece pressing efficiency. Therefore, the friction plate of the braking device of the hot die forging press in the prior art needs to be replaced frequently when being slightly worn, and the hot die forging press needs to be stopped every time of replacement, so that the disassembly and assembly time is long and the operation is inconvenient. Taking the universal braking device of the hot die forging press used in the factory of the applicant as an example, when the wear of the friction plate exceeds 4mm, the hot die forging press needs to be stopped and replaced, and the friction plate needs to be dismounted and mounted once every 10 days for about 14 hours on average, so that the working efficiency of the hot die forging press is seriously influenced.

Disclosure of Invention

The utility model aims at solving the technical problem, provide a simple structure, be convenient for loading and unloading and overhaul, effectively improve the hot die forging press work efficiency height, do not need long-time shut down to change the adjustable stroke arresting gear of hot die forging press that friction piece, safety and stability are good.

The technical scheme includes that the brake pump comprises a brake pump shell, a brake disc and a crankshaft, wherein the rear end of the brake pump shell is installed on a machine body, the outer peripheral surface of the brake pump shell is meshed with the inner wall of the brake pump shell, the crankshaft is fixedly sleeved with a brake disc, the radial peripheral portion of the brake disc is provided with a brake groove hole, a friction plate is arranged in the brake groove hole and located between the brake disc and the end face of the brake pump shell, the thickness of the friction plate is larger than that of the brake disc, and the front end of the brake pump shell is connected with a cylinder.

The gasket group is formed by superposing a plurality of adjusting gaskets with the same or different thicknesses.

The thickness of the friction plate is 14-16mm larger than that of the brake disc.

The brake disc is fixedly sleeved at the front end of the crankshaft through expansion.

The peripheral surface of the brake disc is meshed with the inner wall of the brake pump shell through splines.

The cylinder transmission assembly comprises a brake cylinder and a cylinder flange which are matched, a piston assembly is arranged on the front end face of the brake cylinder, the front end of the brake pin is in contact with the piston assembly, and the rear end of the brake pin is in contact with the brake disc.

The piston assembly comprises a brake piston, a compression spring and a spring flange, wherein the brake piston is partially movably sleeved in a piston groove on the front end surface of the brake cylinder and has an inflation gap with the bottom surface of the piston groove, and the other part of the brake piston extends out of the piston groove and is contacted with the front end of the brake pin; the front end surface of the brake piston is provided with a spring groove, the front end of the compression spring is contacted with the spring flange, and the rear end of the compression spring is contacted with the bottom surface of the spring groove; the fixing bolt sequentially penetrates through the brake cylinder, the cylinder flange and the spring flange to be connected with the nut.

The outer edge of the periphery of the cylinder flange is positioned in a flange groove on the inner wall of the brake piston, and the rear end face of the cylinder flange and the bottom surface of the flange groove have a stroke gap.

And a spring sleeve is arranged between the front end face of the cylinder flange and the spring flange, and the fixing bolt sequentially penetrates through the brake cylinder, the cylinder flange, the spring sleeve and the spring flange to be connected with the nut.

And a plurality of communicated circulating water tanks are arranged in the brake pump shell.

Aiming at the problems in the background technology, the inventor improves the existing braking device by (1) arranging a friction plate between a brake disc and the end surface of a brake pump shell, and when braking, the brake pump shell is pressed by the brake disc through the friction plate, and the two sides of the friction plate respectively provide braking friction force for the brake disc and the brake pump shell, so that the braking effect is good; (2) the brake cylinder is arranged on a brake pump shell, a gasket group is arranged between the brake cylinder and the brake pump shell, and the gasket group can be formed by overlapping a plurality of adjusting gaskets with the same or different thicknesses, so that the adjusting gaskets with corresponding thicknesses can be drawn out according to the abrasion loss of the friction plates to ensure that the brake stroke is unchanged, thereby skillfully solving the problem of brake stroke increase caused by abrasion of the friction plates on the premise of not frequently replacing the friction plates, greatly reducing the replacement frequency of the friction plates, greatly improving the working efficiency and saving time and labor; preferably, the thickness of the friction plate is 14-16mm greater than the thickness of the brake disc (i.e., the maximum amount of wear of the friction plate), and the overall thickness of the pad set is preferably no less than the maximum amount of wear of the friction plate. (3) The piston assembly pushes the brake pin to uniformly apply pressure to the brake disc, the piston assembly comprises a brake piston, a spring and a spring flange, when the brake is not in a braking state, the pressure in an inflation gap is increased when the air cylinder is inflated, the brake piston is pushed to extrude the spring, and the moving distance of the brake piston is limited by a stroke gap; when braking, the inflation clearance is decompressed and the spring reaction force is utilized to reversely push the brake piston, so that the brake piston pushes the brake pin to apply pressure to the brake disc, and finally the brake of the crankshaft is realized. (4) Be equipped with the spring housing between the preceding terminal surface of cylinder flange and the spring flange, fixing bolt passes brake cylinder, cylinder flange, spring housing and spring flange in proper order and is connected with the nut, and it is rotatory with fixing bolt's screw thread, and the size of braking moment is adjusted to the compression spring flange, and the purpose of the best spring pretightning force of control is played to the height of spring housing, and during dismouting at every turn, need not measure every compression spring compression capacity in proper order again, and only need simple messenger's spring flange and the contact of spring housing can guarantee the even of effort to the operation degree of difficulty has further been reduced, improves work efficiency. (5) The brake disc chuck adopts an expansion sleeve locking mode, replaces the traditional pin shaft fixing mode, and is faster to assemble and disassemble. A plurality of communicated circulating water tanks are arranged in the brake pump shell, the water cooling area is increased by utilizing the separated water tanks, the heat exchange capacity is improved, and the service life of the brake is prolonged.

The utility model discloses arresting gear solves at the piston stroke grow accessible adjustment shim group that the rubbing block long time work wear caused, does not need the quick-witted change rubbing block again of tearing open, has improved work efficiency greatly, guarantees the continuity of process, and labour saving and time saving has simple structure, be convenient for load and unload and overhaul, effectively improve hot die forging press work efficiency height, need not stop for a long time and change the friction piece, advantage that the safety stability is good, applicable in various hot die forging press.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a burst diagram of the present invention;

FIG. 3 is an enlarged partial view of the brake cylinder, brake piston and cylinder flange;

FIG. 4 is a side view of the brake pump housing;

FIG. 5 is a block diagram of a spacer shim.

The brake device comprises a crankshaft 1, a brake pump 2, a brake pump shell 3, a brake groove hole 4, a brake disc 5, an expansion sleeve 6, a friction plate 7, a brake disc 8, a bolt 9, a brake pin 10, a brake piston 11, a compression spring 12, a spring sleeve 13, a fixing bolt 14, a cylinder flange 15, a brake cylinder 16, a nut 17, a spring flange 17, a gasket group 18, an adjusting gasket 18.1, a piston groove 19, an inflation gap 20, a spring groove 21, a flange groove 22, a stroke gap 23 and a circulating water groove 24.

Detailed Description

The invention will be further explained with reference to the drawings:

referring to fig. 1 and 2, the rear end of a brake pump housing 2 is mounted on a machine body, the outer circumferential surface of a brake disc 7 is in spline engagement with the inner wall of the brake pump housing 2, the centering performance and the axial movement guidance performance of the brake disc 7 can be improved, the front end of a crankshaft 1 is fixedly sleeved with a brake disc 4 through an expansion sleeve 5, the radial circumference of the brake disc 4 is uniformly provided with a plurality of brake slot holes 3, a friction plate 6 positioned between the brake disc 7 and the end surface of the brake pump housing 2 is arranged in each brake slot hole 3, the thickness of the friction plate 6 is larger than that of the brake disc 4, preferably is 14-16mm larger than that of the brake disc, the thickness is equivalent to the maximum abrasion loss of the friction plate 6, and the front end of the brake pump housing 2 is further connected with a cylinder transmission assembly through a distributed gasket group 18 and a.

Referring to fig. 4, the shim group 18 is formed by overlapping a plurality of adjusting shims 18.1 with the same or different thicknesses, and when the shims are disassembled, the bolts 8 are loosened, and the corresponding adjusting shims 18.1 are pulled out.

Referring to fig. 3, a plurality of communicated circulating water channels 24 are formed in the brake pump shell 2 to increase the contact area between the circulating cooling water and the brake pump shell 2, the circulating cooling water is continuously introduced through the water inlet holes and the water outlet holes, local heat is taken away, and water cooling is accelerated to realize heat exchange. In the same way, a circulating water tank can be arranged in the brake disc 7 to improve the heat dissipation efficiency and prolong the service life of the brake disc.

The cylinder transmission assembly comprises a brake cylinder 15 and a cylinder flange 14 which are sealed in a matched mode, a piston assembly is arranged on the front end face of the brake cylinder 15, the front end of the brake pin 9 is in contact with the piston assembly, and the rear end of the brake pin is in contact with the brake disc 7.

Referring to fig. 1 and 2, the piston assembly comprises a brake piston 10, a compression spring 11 and a spring flange 17, wherein the brake piston 10 is partially movably sleeved in a piston groove 19 on the front end surface of the brake cylinder 15 and has an inflation gap 20 with the bottom surface of the piston groove 19, and the other part extends out of the piston groove 19 and is in contact with the front end of the brake pin 9; the front end face of the brake piston 10 is provided with a spring groove 21, the front end of the compression spring 11 is contacted with the spring flange 17, and the rear end of the compression spring is contacted with the bottom surface of the spring groove 21; the outer edge of the circumference of the cylinder flange 14 is located in a flange groove 22 on the inner wall of the brake piston 10, and a stroke gap 23, which is the stroke of the brake piston 10, is provided between the rear end surface of the cylinder flange 14 and the bottom surface of the flange groove 22. A spring sleeve 12 is arranged between the front end face of the cylinder flange 14 and the spring flange 17, and the fixing bolt 13 sequentially penetrates through the brake cylinder 15, the cylinder flange 14, the spring sleeve 12 and the spring flange 17 to be connected with a nut 16. The nut 16 pushes the spring flange 17 by screw drive, so that the compression amount of the compression spring 11 can be adjusted. When the spring flange 17 is in contact with the spring housing 12, the spring housing 12 limits the movement of the spring flange 17 and the braking torque generated by the compression spring 11 is sufficient to brake the crankshaft 1.

The working principle is as follows:

when forging is started, pressure gas is filled into the inflation gap 20 through the air hole in the brake cylinder 15, so that the inflation gap 20 is enlarged, the pressure generated after the brake cylinder 15 is pressed pushes the brake piston 10 to move forwards (towards the left side in the drawing), the compression spring 12 is compressed until the brake piston 10 is limited by the cylinder flange 14, and the left movement stroke is limited by the stroke gap 23.

At this time, the friction block 6, the brake disc 7 and the brake pin 9 are not subjected to axial pressure. At this time, a gap exists between the brake pin 9 and the brake piston 10, and since the brake disc 4 is no longer subjected to axial pressure, when the crankshaft 1 rotates, the brake disc 4 rotates together, and the friction force generated between the friction block 6 and the brake pump shell 2 pushes the friction block 6, the brake disc 7 and the brake pin 9 to move forwards in a reverse direction, so that the crankshaft 1 is finally kept in a free rotating state.

When the forging is finished, the crankshaft needs to be completely braked before the product needs to be adjusted to carry out the next forging. When the pressure in the air charging gap 20 is relieved by releasing the pressure in the brake cylinder 15, the reaction force generated by the compression spring 11 sequentially pushes the brake piston 10 and the brake pin 9 to move backwards (towards the right side in the figure), so that the air charging gap 20 is reduced, the brake disc 7 can move backwards under the stress, and the axial force is applied to the friction block 6. The friction torque generated between the two end faces of the friction block 6 and the brake pump housing 2 and the brake disk 7 completely brakes the rotating brake disk 3 and the crankshaft 1. After braking is completed, the forged product can be removed and replaced with a new product for the next forging.

When the friction block 6 is operated for a long time, the friction block 6 is worn, so that the thickness of the friction block becomes thin. The brake piston 10, the brake pin 9 and the brake disk 7 are gradually moved backward by the elastic force of the compression spring 11. Referring to fig. 2, at this time, the braking stroke between the brake piston 10 and the cylinder flange 14 becomes large, resulting in a variation in braking time and a reduction in braking torque.

When the abrasion loss reaches a set value, only the bolt 8 is loosened, the adjusting shim 18.1 corresponding to the abrasion loss thickness of the friction plate 6 is drawn out from the shim group 18, the bolt 8 is fastened again, and after the shim group 18 is adjusted, the cylinder transmission assembly moves to the right integrally at the moment, so that the compression amount of the compression spring 11 needs to be adjusted again, and due to the existence of the spring sleeve 12 (the length size of the spring sleeve is determined through calculation), the compression amount can be ensured to return to the initial calculation size only by rotating the nut 16 on the fixing bolt 13 to adjust the spring flange 17 backwards to be in contact with the spring sleeve 12, and the measurement is not needed one by one. Finally, the nuts 16 on the fixing bolts 13 are readjusted, so that the braking stroke of the cylinder flange 14 and the braking piston 10 can be the original optimal stroke, the reconditioning is not needed, the repeated replacement of the friction plate 6 is not needed, and the replacement is only needed when the friction plate 6 is worn to the maximum loss, so that a great amount of time cost and production cost are saved.

Taking the practical application of the factory of the applicant as an example, when the wear of the friction plate exceeds 4mm, only one adjusting shim 18.1 with the thickness of 4mm in the shim group 18 needs to be drawn out according to the method, then the braking stroke is readjusted to be the original optimal stroke, the friction plate 6 does not need to be continuously replaced, and the whole adjusting process of drawing out the adjusting shim 18.1 only needs about 30 min; only when the friction plate 6 reaches the designed maximum wear amount of 16mm, the friction plate 6 needs to be replaced as a whole. After the braking device is adopted, the replacement frequency of the friction plate 6 is changed from once per 10 days to once per 40 days, and only one adjusting gasket 18.1 needs to be drawn out once per 30min per 10 days in 40 days, so that the working efficiency is greatly improved, the operation cost is reduced, and time and labor are saved.

Claims

1. The stroke-adjustable braking device of the hot die forging press comprises a brake pump shell, a brake disc and a crankshaft, wherein the rear end of the brake pump shell is installed on a machine body, the outer peripheral surface of the brake disc is meshed with the inner wall of the brake pump shell, and the crankshaft is fixedly sleeved with a brake disc, and is characterized in that a brake groove hole is formed in the radial peripheral portion of the brake disc, a friction plate is arranged in the brake groove hole and located between the brake disc and the end face of the brake pump shell, the thickness of the friction plate is larger than that of the brake disc, and the front end of the brake pump shell is connected with a cylinder transmission assembly through a.

2. The adjustable stroke brake device of the hot die forging press as claimed in claim 1, wherein said shim pack is composed of a plurality of adjustment shims of the same or different thickness.

3. The adjustable stroke brake apparatus of a hot die forging press as claimed in claim 2, wherein the thickness of said friction plate is 14-16mm greater than the thickness of the brake disc.

4. The adjustable stroke brake of hot die forging press as claimed in claim 1, wherein said brake disc is fixedly fitted to the front end of the crankshaft via an expansion sleeve.

5. The adjustable stroke brake apparatus of a hot die forging press as set forth in claim 1, wherein an outer peripheral surface of said brake disc is spline-engaged with an inner wall of said brake pump housing.

6. The adjustable stroke brake device of the hot die forging press according to any one of claims 1 to 5, wherein the cylinder transmission assembly comprises a brake cylinder and a cylinder flange which are matched, a piston assembly is arranged on the front end surface of the brake cylinder, the front end of the brake pin is in contact with the piston assembly, and the rear end of the brake pin is in contact with the brake disc.

7. The adjustable stroke brake device of the hot die forging press as claimed in claim 6, wherein said piston assembly comprises a brake piston, a compression spring and a spring flange, said brake piston is partially movably sleeved in a piston groove of the front end face of said brake cylinder and has an inflation gap with the bottom of the piston groove, and the other part extends out of the piston groove to contact with the front end of said brake pin; the front end surface of the brake piston is provided with a spring groove, the front end of the compression spring is contacted with the spring flange, and the rear end of the compression spring is contacted with the bottom surface of the spring groove; the fixing bolt sequentially penetrates through the brake cylinder, the cylinder flange and the spring flange to be connected with the nut.

8. The adjustable stroke brake apparatus of a hot die forging press according to claim 7, wherein the peripheral outer edge of the cylinder flange is located in a flange groove on the inner wall of the brake piston, and the rear end face of the cylinder flange has a stroke gap with the bottom face of the flange groove.

9. The adjustable stroke braking device of the hot die forging press as claimed in claim 8, wherein a spring sleeve is provided between the front end face of the cylinder flange and the spring flange, and the fixing bolt is connected with the nut by passing through the braking cylinder, the cylinder flange, the spring sleeve and the spring flange in sequence.

10. The adjustable stroke brake apparatus of a hot die forging press as claimed in claim 1, wherein said brake pump housing is formed with a plurality of communicating circulating water grooves therein.