CN104061260A - Powder metallurgy brake shoe with bent welded structure - Google Patents
Powder metallurgy brake shoe with bent welded structure Download PDFInfo
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- CN104061260A CN104061260A CN201410183970.XA CN201410183970A CN104061260A CN 104061260 A CN104061260 A CN 104061260A CN 201410183970 A CN201410183970 A CN 201410183970A CN 104061260 A CN104061260 A CN 104061260A
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Abstract
The invention relates to a powder metallurgy brake shoe, in particular to a powder metallurgy brake shoe with a bent welded structure, which comprises a steel backing, a skeleton, a plurality of friction blocks, a brake shoe nose and a stopping block, wherein a brake block is formed on one skeleton by sintering friction blocks; the skeleton is welded onto the steel backing. According to the invention, a plurality of friction blocks are welded onto one whole skeleton at the same time, and then, the whole skeleton is welded onto the steel backing, the powder metallurgy brake shoe has the benefits of large friction area, simple structure, high convenience for processing, short processing periods, low cost, low possibility of looseness and flaking off for brake blocks, and high safety.
Description
Technical field
The present invention relates to a kind of powder metallurgy brake block, particularly a kind of bending welded structure powder metallurgy brake block.
Background technique
In railway locomotive and vehicle operating process, need braking, it is exactly brake shoe that direct friction wheel makes the braking component of vehicle parking.The brake shoe that tradition is used has three types, i.e. cast iron brake shoe, composite brake shoe and powder metallurgy brake block.Cast iron brake shoe weight is large, use noise is high, wearing and tearing are large; Composite brake shoe heat dispersion is poor, and environment is had to pollution; Cast iron brake shoe and composite brake shoe generally can only be used for the locomotive of speed per hour lower than 120KM, and working life is short, along with the raising of locomotive speed, brake shoe performance is had higher requirement, require brake shoe not only to there is good braking ability, and require not produce irregular wear and damage, the adhesion between wheel track is not produced to adverse effect, free from environmental pollution, powder metallurgy brake block can meet above requirement.Chinese patent ZL97215240.7 discloses a kind of power metallurgy quasi-high-speed brake shoe, and it comprises three little steel backing, and on three little steel backing, pressure sintering copper iron powder metal becomes three friction pieces, and three friction pieces and skeleton adopt rivet to rivet.This patented technology adopts pressure sintering copper iron powder metal on three little steel backing to become three friction pieces, three friction pieces are riveted with skeleton again, there is following defect in it: 1, on skeleton, exerts pressure when brake pad is contacted with wheel tread, the pressure that skeleton bears is very huge, easily fracture; 2, adopt riveting method, brake pad and skeleton easily to come off, Security is not high, and adopts riveting method, and rivet can take up room, and also may interfere with miscellaneous part, affects the performance of brake shoe.Chinese patent ZL01229371.7 discloses a kind of powder metallurgy brake block, and it comprises an arc skeleton, has the friction material block by metallic dust moulding at the inner face direct sintering of skeleton arc.It is compared with Chinese patent ZL97215240.7, and it has saved steel backing, but brake pad direct sintering on skeleton, in the time of sintering, sintering temperature is very high, steel backing very easily deforms, reject rate is high, and brake shoe is extremely short working life, Safety performance is very poor.
In addition, on market, also has a kind of powder metallurgy brake block, before sintering, to be that many friction pieces 4 are equidistant be arranged on same skeleton A3 part brake block, skeleton A3 part is plane, being connected between brake block and steel backing A1 adopts following three kinds of modes: as shown in Figure 1, the first is that brake block and steel backing adopt riveting method.As shown in Figure 2, the second way is that riveted joint adds welding, is actually on the basis of the first riveting method and welds in brake block surrounding.As shown in Figure 3, the third structure is the welded structure in using at present, is on the second architecture basics, to cancel brake block riveted joint, retains the welding of brake block periphery.The common trait of these three kinds of structures as shown in Figure 4, has many brake block on every brake shoe, its brake block is formed through pressure sintering by a brake pad and the combination of skeleton, then many equidistant settings of part brake block and be welded on steel backing.All there is some deficiency in the brake lining of above-mentioned three kinds of Placements, the first riveted structure is that brake block is riveted on steel backing, need on brake block and steel backing, process riveted holes, in order to process riveted holes at brake block, thereby the area that must reduce brake pad on brake block exposes skeleton, because friction area reduces, increase the development difficulty of braking material.Meanwhile, in braking process, brake block rubbing surface and wheel tread produce friction high temperature, and rivet is prone to distortion or fracture, easily cause brake block that loosening and dropping situations occur, poor stability, and the brake shoe of current this riveted structure is substantially superseded.The second is that riveted joint adds welded structure because the process-cycle is long and processing cost is higher, and brake shoe manufacturer abandons this structure gradually.The third welded structure is the brake shoe structure in using at present, is on the second architecture basics, to cancel brake block riveted joint, retains the welding of brake block periphery, and left and right brake block welds three sides, as shown in Figure 5.And middle brake block is due to little with left and right sides brake block gap, can not weld brake block left and right sides, both sides before and after can only welding, simultaneously, operator in the middle of welding when brake block, because gap is little, inconvenient operation, sometimes there is the situation of rosin joint, in the middle of causing, the connecting welding intensity of brake block upper skeleton and steel backing is low, causes the middle brake block of brake shoe to come off, as shown in Figure 6 in braking process, its reliability is low, affects traffic safety.
Summary of the invention
For above technological deficiency, the object of the present invention is to provide a kind of bending welded structure powder metallurgy brake block.It adopts polylith brake pad to be welded on a monoblock skeleton simultaneously, then by monoblock frame welding on steel backing, its friction area is large, simple in structure, easy to process, the process-cycle is short, cost is low, brake block can not become flexible and come off, safe.
To achieve these goals, the present invention is by the following technical solutions:
A kind of bending welded structure powder metallurgy brake block, comprise steel backing, skeleton, some brake pads, brake shoe nose and block, all brake pad sintering form brake block on same skeleton, frame welding is on steel backing, described brake block is made up of three～five brake pads and a skeleton, brake pad powder compaction, by being equidistantly welded on after pressurized high-temperature sintering on same skeleton, in the middle of on brake block, the skeleton of brake pad both sides is curved shape, bending deflection point or line are II and III, 4 of II and III and skeleton both sides I and IV or line are all on same radius of arc R, and radius of arc R is identical with steel backing radius of arc, forniciform brake block is welded in steel backing on circular arc camber along surrounding, brake shoe nose and block are also welded in steel backing external arc curved surface groove simultaneously.
Described brake pad is three.
Compared with prior art, the present invention has following beneficial effect:
1, the invention provides a kind of speed per hour high temperature resistant in 200km/h left and right, wear and tear little, brake block and brake pad do not become flexible and fall the bending welding brake shoe structure of piece, owing to adopting the pressure sintering of heating of many brake pads to form one whole brake block on a skeleton simultaneously, skeleton is played to reinforing function, make not easy-rupturing of skeleton, one monoblock brake block welds and can strengthen steel backing tensile strength with a monoblock steel backing again, can effectively prevent steel backing fracture, and can avoid many brake pad high temperature pressing sintering of available technology adopting on many skeletons, to form many brake block causing locomotive in frequent braking process, there is the phenomenon coming off in the middle brake block on brake shoe, eliminate traffic safety hidden danger.In addition, many brake pads are simultaneously once sintered on same cuboid skeleton, do not need to process many little skeletons of less single-piece, and manufacturing process is simple, and the process-cycle is short, can realize automatic production, and can also improve the overall performance of brake shoe.
2, the present invention forms large brake block by the pressure sintering simultaneously of many brake pads on same skeleton, before brake block and steel backing welding, skeleton on brake block is carried out to two places or many places bending, skeleton crooked position and skeleton both sides are being coexisted on a circular arc, radius of arc R is identical with steel backing radius of arc, skeleton and steel backing can be fitted closely, add the firm degree of strong weld; After brake block bending deflection, be welded on again on steel backing, welded gaps is large, there is certain bend angle, bonding area is large, weld strength is high, can avoid the little brake block of single-piece to be welded on respectively on steel backing time, and the defect of brake block arranged on left and right sides in the middle of can not welding, in addition, welding between large brake block and steel backing is the welding operation of being more convenient for of the welding respectively and between steel backing than little brake block, thereby has improved the weld strength between brake block and steel backing, safe and reliable on the vehicle of high speed operation.
Brief description of the drawings
Fig. 1 is brake shoe riveted structure schematic diagram;
Fig. 2 is brake shoe riveted joint, welded structure schematic diagram;
Fig. 3 is brake shoe welded structure schematic diagram;
Fig. 4 is brake pad and skeleton combination schematic diagram;
Fig. 5 is middle brake block welding schematic diagram;
Fig. 6 is the brake block schematic diagram that comes off in the middle of brake shoe welded structure;
Fig. 7 is structural representation of the present invention;
Fig. 8 is brake block sintering pre-structure schematic diagram of the present invention;
Fig. 9 is brake pad of the present invention and skeleton surface of contact schematic diagram;
Figure 10 is brake block bending deflection four point (line) position views of the present invention;
Figure 11 is brake block of the present invention and steel backing welded structure figure;
Figure 12 is brake block warp architecture schematic diagram of the present invention;
Figure 13 is that the present invention welds brake shoe nose and stop block structure schematic diagram;
Figure 14 is that brake block of the present invention is fixedly welded on structural representation on steel backing;
In figure: steel backing A1, brake block 11, rivet 2, skeleton A3, friction piece 4, welding 5, riveted joint 6, the left and right sides do not weld 7, both sides, front and back welding 8, brake pad 1-1, skeleton 2-2, steel backing 3-3, brake shoe nose 4-4, block 5-5, surface of contact 9, bending deflection place 10.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but claimed scope is not limited to content described in the present embodiment.
As shown in Fig. 7-14, the present invention is a kind of bending welded structure powder metallurgy brake block, comprise steel backing 3-3, skeleton 2-2, some brake pad 1-1, brake shoe nose 4-4 and block 5-5, all brake pad 1-1 sintering form brake block 11 on same skeleton 2-2, skeleton 2-2 is welded on steel backing 3-3, described brake block 11 is made up of three～five brake pad 1-1 and a skeleton 2-2, brake pad 1-1 powder compaction, by being equidistantly welded on after pressurized high-temperature sintering on same skeleton 2-2, in the middle of on brake block 11, the skeleton 2-2 of brake pad both sides is curved shape, bending deflection point or line are II and III, 4 of II and III and skeleton both sides I and IV or line are all on same radius of arc R, and radius of arc R is identical with steel backing 3-3 radius of arc, forniciform brake block 11 is welded in steel backing 3-3 on circular arc camber along surrounding, brake shoe nose 4-4 and block 5-5 are also welded in steel backing 3-3 external arc curved surface groove simultaneously.
Described brake pad 1-1 is three.
The present invention is produced and is obtained by the following mode of production.
As shown in Figure 8, powder compaction is become to brake pad 1-1, metallic material is machined into skeleton 2-2, the equidistant setting of brake pad 1-1 is also bundled in skeleton 2-2 above, upper by being welded on skeleton 2-2 after pressurized high-temperature sintering, forms brake block 11.As shown in Figure 9, after skeleton 2-2 part processing, keep plane, can not have distortion or buckling phenomenon, guarantee brake pad 1 with skeleton 2 surface of contact 9 areas in maximum, guarantee brake block 11 pressure sinterings after brake pad 1-1 be connected and do not occur segregation phenomenon with skeleton 2-2.As shown in Figure 10 and Figure 12, pass through External Force Acting, bending deflection is carried out at intermediate friction piece 1-1 two side skeleton 2-2 positions to the brake block 11 after sintering, bending deflection place is that 10, two places bending deflection point (line) II is identical with steel backing 3-3 radius of arc with the IV radius of arc that totally 4 points (line) form with III and skeleton 2-2 both sides I.As shown in figure 13, then on steel backing 3-3, process the groove of welding brake shoe nose 4-4, and the while processes the groove of welding block 5-5 in brake shoe nose 4-4 groove bilateral symmetry position, brake shoe nose 4-4 and block 5-5 are inserted into respectively outside steel backing 3-3 circular arc in groove to welding brake shoe nose 4-4 and block 5-5.Finally, as shown in figure 14, in the circular arc shaped inside of steel backing 3-3, brake block 11 is fixed on steel backing 3-3, brake block 11 upper skeleton 2-2 and steel backing 3-3 are welded along surrounding.
Claims (2)
1. a bending welded structure powder metallurgy brake block, comprise steel backing (3-3), skeleton (2-2), some brake pads (1-1), brake shoe nose (4-4) and block (5-5), it is characterized in that: all brake pads (1-1) sintering is at same skeleton (2-2) upper composition brake block (11), skeleton (2-2) is welded on steel backing (3-3), described brake block (11) is made up of three～five brake pads (1-1) and a skeleton (2-2), powder compaction for brake pad (1-1), by being equidistantly welded on after pressurized high-temperature sintering on same skeleton (2-2), in the middle of brake block (11) is upper, the skeleton (2-2) of brake pad both sides is curved shape, bending deflection point or line are II and III, 4 of II and III and skeleton both sides I and IV or line are all on same radius of arc R, and radius of arc R is identical with steel backing (3-3) radius of arc, forniciform brake block (11) is welded on the interior circular arc camber of steel backing (3-3) along surrounding, brake shoe nose (4-4) and block (5-5) are also welded in steel backing (3-3) external arc curved surface groove simultaneously.
2. bending welded structure powder metallurgy brake block as claimed in claim 1, is characterized in that: described brake pad (1-1) is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183970.XA CN104061260A (en) | 2014-05-04 | 2014-05-04 | Powder metallurgy brake shoe with bent welded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183970.XA CN104061260A (en) | 2014-05-04 | 2014-05-04 | Powder metallurgy brake shoe with bent welded structure |
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| CN104061260A true CN104061260A (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410183970.XA Pending CN104061260A (en) | 2014-05-04 | 2014-05-04 | Powder metallurgy brake shoe with bent welded structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930083A (en) * | 2015-06-26 | 2015-09-23 | 贵州新安航空机械有限责任公司 | Brake shoe structure of brake and manufacturing technology thereof |
| CN104963971A (en) * | 2015-06-30 | 2015-10-07 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe structure and machining method thereof |
| CN105041919A (en) * | 2015-06-26 | 2015-11-11 | 贵州新安航空机械有限责任公司 | Double-tile-back structured brake shoe and manufacturing process thereof |
| CN105987103A (en) * | 2015-02-10 | 2016-10-05 | 苏州东南电碳科技有限公司 | Powder metallurgy brake shoe for electric locomotive |
| CN105983697A (en) * | 2015-02-10 | 2016-10-05 | 苏州东南电碳科技有限公司 | Manufacturing method for powder metallurgy brake shoe for electric locomotive |
| CN110605387A (en) * | 2019-08-02 | 2019-12-24 | 贵州新安航空机械有限责任公司 | Sintering method of integral sintered powder metallurgy brake pad |
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| CN201166075Y (en) * | 2008-03-21 | 2008-12-17 | 北京华夏友联电气化新技术发展有限公司 | Powder metallurgical brake shoe |
| CN201621210U (en) * | 2009-12-24 | 2010-11-03 | 贵州新安航空机械有限责任公司 | Novel brake shoe |
| CN201627849U (en) * | 2009-12-24 | 2010-11-10 | 贵州新安航空机械有限责任公司 | Anti-breaking brake shoe |
| CN204061662U (en) * | 2014-05-04 | 2014-12-31 | 贵州新安航空机械有限责任公司 | A kind of powder metallurgy brake block of improvement |
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- 2014-05-04 CN CN201410183970.XA patent/CN104061260A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201166075Y (en) * | 2008-03-21 | 2008-12-17 | 北京华夏友联电气化新技术发展有限公司 | Powder metallurgical brake shoe |
| CN201621210U (en) * | 2009-12-24 | 2010-11-03 | 贵州新安航空机械有限责任公司 | Novel brake shoe |
| CN201627849U (en) * | 2009-12-24 | 2010-11-10 | 贵州新安航空机械有限责任公司 | Anti-breaking brake shoe |
| CN204061662U (en) * | 2014-05-04 | 2014-12-31 | 贵州新安航空机械有限责任公司 | A kind of powder metallurgy brake block of improvement |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987103A (en) * | 2015-02-10 | 2016-10-05 | 苏州东南电碳科技有限公司 | Powder metallurgy brake shoe for electric locomotive |
| CN105983697A (en) * | 2015-02-10 | 2016-10-05 | 苏州东南电碳科技有限公司 | Manufacturing method for powder metallurgy brake shoe for electric locomotive |
| CN105987103B (en) * | 2015-02-10 | 2019-04-26 | 苏州东南佳新材料股份有限公司 | A kind of use for electric locomotive powder metallurgy brake block |
| CN104930083A (en) * | 2015-06-26 | 2015-09-23 | 贵州新安航空机械有限责任公司 | Brake shoe structure of brake and manufacturing technology thereof |
| CN105041919A (en) * | 2015-06-26 | 2015-11-11 | 贵州新安航空机械有限责任公司 | Double-tile-back structured brake shoe and manufacturing process thereof |
| CN105041919B (en) * | 2015-06-26 | 2017-10-24 | 贵州新安航空机械有限责任公司 | A kind of double watt back structure brake shoe and its manufacturing process |
| CN104930083B (en) * | 2015-06-26 | 2017-10-27 | 贵州新安航空机械有限责任公司 | A kind of brake tile structure and its manufacturing process |
| CN104963971A (en) * | 2015-06-30 | 2015-10-07 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe structure and machining method thereof |
| CN104963971B (en) * | 2015-06-30 | 2018-09-14 | 贵州新安航空机械有限责任公司 | A kind of powder metallurgy brake block structure and its processing method |
| CN110605387A (en) * | 2019-08-02 | 2019-12-24 | 贵州新安航空机械有限责任公司 | Sintering method of integral sintered powder metallurgy brake pad |
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Application publication date: 20140924 |