CN1013893B - Non-asbestos brake block strengthened with wire mesh for drilling machine - Google Patents
Non-asbestos brake block strengthened with wire mesh for drilling machineInfo
- Publication number
- CN1013893B CN1013893B CN 89105464 CN89105464A CN1013893B CN 1013893 B CN1013893 B CN 1013893B CN 89105464 CN89105464 CN 89105464 CN 89105464 A CN89105464 A CN 89105464A CN 1013893 B CN1013893 B CN 1013893B
- Authority
- CN
- China
- Prior art keywords
- brake block
- wire mesh
- friction portion
- mesh sheet
- asbestos
- Prior art date
- 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.)
- Expired
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a non-asbestos wire mesh reinforcing braking block for a drilling machine, which belongs to the improvement of organic group friction materials. The braking block is composed of wire mesh sheets and non-asbestos organic group mold plastics, and is characterized in that the present invention has the advantages of sufficient mechanical strength, low production cost, easy obtainment of raw materials, safety and reliability.
Description
The present invention relates to a kind of non-asbestos brake block strengthened with wire mesh for drilling machine (hereinafter to be referred as brake block) that has, it belongs to the organic group friction material.
As everyone knows, asbestos have serious harm to human health.Therefore various countries seek the substitute of asbestos already, produce the organic group friction material.So far the non-asbestos fiber that is used for the organic group friction material has carbon fiber, glass fibre, steel fiber and organic fiber etc., and these fibers are had relatively high expectations, and price is more expensive and the source of goods is limited, therefore, is subjected to certain placing restrictions in the use.
The object of the present invention is to provide a kind of sufficiently high mechanical strength that has, stable friction performance, cost of production is low, the brake block that raw material are easy to get.
The present invention is a kind of brake block, is made up of wire mesh sheet and no asbestos organic base moulding plastics (hereinafter to be referred as molding material), it is characterized in that:
Wire gaze is generally used brass wire, zinc silk and mild steel wire etc., and braiding forms respectively.The specification of wire mesh sheet is the 4-40 order, and its optimum specifications is the 8-12 order.The wire diameter of wire mesh sheet is 0.511～0.127 millimeter, and its optimum diameter is 0.405～0.255 millimeter.
Brake block can divide friction and non-friction two-part.Friction portion is positioned at below the brake block friction surface, uses the rivet head upper part along the thickness Vertical direction to assembling; Another part is non-friction portion.The used molding material of these two-part is identical, but the material of wire mesh sheet and arrangement mode difference, also can be identical.At friction portion, wire mesh sheet had both played humidification, play conductive force again, and be a kind of good frictional property regulator, should according to brake block the friction and wear behavior that should have select, general many with brass wire mesh sheet or zinc silk netting etc., its arrangement mode has collapsible or oblique installing type.Collapsible is remodeling on the oblique installing type basis, and it is (or combining unit) in the wire mesh sheet of oblique installing type to be converted into V-type along its length form.The wire mesh sheet of non-friction portion often adopts intensity higher, the low carbon steel silk screen sheet that price is lower, and its arrangement mode mostly is flush system.Like this, both can guarantee that brake block has sufficiently high mechanical strength and best friction and wear characteristic in use, can reduce production costs again.For simplicity, the friction portion of brake block and non-friction portion can adopt same arrangement form, same wire mesh sheet or use different arrangement forms, the different metal silk netting.
Molding material comprises Bond and frictional property regulator, for gaining in strength, also can add the non-asbestos fiber of some.Bond is a phenol-formaldehyde resin modified, and shared weight ratio is 15-25% in molding material.Frictional property regulator all is the powdery mineral filler, and its shared weight ratio in molding is 60-80%, and non-asbestos reinforcing fiber accounts for 0-20%.Wire mesh sheet shared weight ratio in the friction portion of brake block is 3-15%, and wherein the weight ratio of combination property the best is 5-10%.
The making method of molding material can adopt common dry method, wet type or traditional rubber product processing method.As adopt dry method or wet method, and can in specialized mould, be prefabricated into combining unit earlier with powdery or granular even molding material with golden border silk netting, then, in forming die, press the principle of metal silk netting and molding material space, add and be pressed into brake block.If adopt traditional rubber product processing method, can be processed into single sheet molding compound earlier, then, in forming die, add wire mesh sheet, according to the principle of wire mesh sheet and molding material space, add and be pressed into brake block.
The present invention has following advantage compared with the prior art:
1. has sufficiently high mechanical strength;
2. cost of production is low;
3. raw material are easy to get.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further described, wherein:
Fig. 1, the cross section cross-sectional schematic of brake block (wherein: the friction portion wire mesh sheet is an oblique installing type, and non-friction portion wire mesh sheet is tiling);
Fig. 2, the wire mesh sheet of brake block and molding material combining unit schematic representation;
Fig. 3 has the brake block making method of matrix friction surface, and it is along the cross-sectional schematic of A-A direction among Fig. 4;
Fig. 4 has the brake block making method of matrix friction surface, and it is along B-B direction cross-sectional schematic among Fig. 3.
The coding key of each component is as follows among the above figure:
The 1-wire mesh sheet, the 2-molding material, the 3-rivet hole,
The 4-friction surface, the 5-friction portion, the non-friction portion of 6-,
The 7-bottom surface, 8-moulding upper mould, 9-forming die counterdie.
The manufacture method of brake block: the wire mesh sheet 1(of brake block friction portion 5 is a brass wire) be oblique installing type, the wire mesh sheet 1(of non-friction portion 6 is a mild steel wire) be flush system.Earlier wire gaze being cut into the wire mesh sheet 1 of prescribed level, adopting common dry process, molding material 2 is processed into the uniform pulverulent mixture of component, then, in specialized mould, is 70-80 ℃ in temperature, and pressure is 400-500kgf/cm
2Condition under, with molding material 2 and the wire mesh sheet 1 that cuts in advance, be pressed into combining unit as shown in Figure 2 together.The wire mesh sheet 1(brass wire of friction portion 5) shared weight percentage is 3-15% in combining unit, and its optimum weight ratio is 5-10%.Press metal silk netting 1 and the superimposed principle in molding material 2 both spaces again, combining unit is put into the forming die counterdie 9 that is preheating to 160-170 ℃, when laying, the combining unit of friction portion 5, its length direction is consistent with the circumferencial direction of brake block, the frictional force direction that produces when promptly using with brake block is consistent, and along the width of brake block, the superimposed die cavity bottom that is arranged in neatly tilts.Then still press in the above metal silk netting 1 and molding material 2 apart from one another by principle, non-friction portion 6 combining units of parallel laying specified quantity.Finish, put down moulding upper mould 8, pressurize, pressure is 300kgf/cm
2With this understanding, the molding material melted by heating flows and is full of whole die cavity, and bonds together securely with wire mesh sheet 1, through behind the certain hour, take out brake block in mould, again through heat treatment, boring rivet hole and surface Machining becomes the brake block with use value.
Claims (4)
1, a kind of non-asbestos brake block strengthened with wire mesh for drilling machine (hereinafter to be referred as brake block) by: wire mesh sheet, no asbestos organic base moulding plastics are formed, and it is characterized in that:
A) specification of wire mesh sheet is the 4-40 order, and its optimum specifications is the 8-12 order;
B) wire diameter of wire mesh sheet is the 0.511-0.127 millimeter, and its optimum diameter is the 0.405-0.255 millimeter;
C) wire mesh sheet is in the friction portion of brake block, and its arrangement mode is an oblique installing type;
D) wire mesh sheet is in the non-friction portion of brake block, and its arrangement mode is a flush system;
E) friction portion of brake block and non-friction portion, the wire mesh sheet of employing unlike material;
F) at the friction portion of brake block, the percentage of the shared weight of wire mesh sheet is 3-15%, and the percentage of its optimum weight is 5-10%;
G) friction portion of brake block is identical with the used molding material of non-friction portion.
2, brake block according to claim 1 is characterized in that: wire mesh sheet is in the friction portion of brake block, and its arrangement mode also can be collapsible.
3, brake block according to claim 1 is characterized in that: the non-friction portion of brake block, can adopt the wire mesh sheet with the identical material of friction portion.
4, brake block according to claim 1 is characterized in that: the non-friction portion of brake block and the arrangement mode of wire mesh sheet, can adopt the arrangement mode identical with friction portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105464 CN1013893B (en) | 1989-01-19 | 1989-01-19 | Non-asbestos brake block strengthened with wire mesh for drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105464 CN1013893B (en) | 1989-01-19 | 1989-01-19 | Non-asbestos brake block strengthened with wire mesh for drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044323A CN1044323A (en) | 1990-08-01 |
| CN1013893B true CN1013893B (en) | 1991-09-11 |
Family
ID=4856217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105464 Expired CN1013893B (en) | 1989-01-19 | 1989-01-19 | Non-asbestos brake block strengthened with wire mesh for drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013893B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417130A (en) * | 2010-09-24 | 2012-04-18 | 株式会社日立制作所 | Emergency braking device and elevator using same |
-
1989
- 1989-01-19 CN CN 89105464 patent/CN1013893B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417130A (en) * | 2010-09-24 | 2012-04-18 | 株式会社日立制作所 | Emergency braking device and elevator using same |
| CN102417130B (en) * | 2010-09-24 | 2015-05-20 | 株式会社日立制作所 | Emergency braking device and elevator using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044323A (en) | 1990-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |