EP2552615B1

EP2552615B1 - Self-lubricating dwell cam driver

Info

Publication number: EP2552615B1
Application number: EP11722872.6A
Authority: EP
Inventors: Gianluca BERTONI
Original assignee: Gsb Oilles Imalat Sanpazticltd Sti
Current assignee: Gsb Oilles Imalat Sanpazticltd Sti
Priority date: 2011-01-17
Filing date: 2011-04-12
Publication date: 2017-06-07
Anticipated expiration: 2031-04-12
Also published as: ES2636911T3; WO2012098423A1; PL2552615T3; PT2552615T; HRP20171279T1; EP2552615A1

Description

Technological Field:

The invention is pertinent to a self-lubricating v block and angled friction plate component in mould components of mechanical presses used in shaping of metal sheet parts used in vehicle bodies in the automotive industry.

Known Status of the Technique:

There are many car manufacturers in our country and in Europe and the automotive industry makes a breakthrough along with increasing market share and competition. Especially in an era of increasing costs automotive manufacturers also place considerable importance to their costs in order to play a more active role in the market.
One of indispensable raw materials in the automotive industry is sheet material. Sheet material makes up the entire body of the car and acts as a structural element constituent about % 70 of vehicle. In general metal sheet materials supplied from major steel plants are brought into metalworking department of car factories and in this place forms and designs of body parts of the vehicle to be produced are given by large mechanical presses.
Along with progressive technology from now on dimensional tolerances in produced parts being on the decrease more quality and more precise manufacturing techniques become prominent. On the part of the automobile industry, too, precise manufacturing techniques that are of great importance matter to especially in manufacturing and assembly of body parts of the vehicle in terms of zero defect production philosophy.
Today for production of sheet body parts having such precise dimensional tolerances self-lubricating v block and angled friction plate materials that can be used as mould component in mechanical presses are used by many manufacturers. This kind of components can be used in machine movements' segments where self-lubricating high wear and friction occur.
V blocks and angled friction plates are used as the self-lubricating segment used in mould components and v blocks are composed of male and female blocks. As female part generally stainless steel or ck45 %0, 45 carbon-containing unalloyed steel is used, high-strength manganese bronze is used in v blocks bottom male section and angled friction plate. Such kind of bronze parts are generally used in the segments where under large loads, requiring high-strength but working at low speeds and friction is high. Bronze worn in V block or angled friction plate, male block is worn, frayed out and malfunctioned. A complete male block or angled friction plate which is discarded is made of bronze material and a material supplied at expensive price in the market. Therefore for both producer and consumer companies purchase cost of materials and discarded material quantity are increasing and this is reflected in the prices of producers as well.
On male bronze part of V-block or on sliding surface of glass angled friction plate there are graphite holes for lubricating and these grooves are filled by graphite blocks linked together by various binders. Graphite as is known due to incorporating slipperiness and lubricating properties also adds an extra lubricator property to the part.
In Europe and in our country, too, although there is not a suchlike product in terms of design self-lubricating and used in various processes various mould components are used. In US Patent No. 5718144 interlocked with each other moving a horizontal axis sliding over each other an angled friction plate part is used in stamping press. The part contains an anvil placed plug-in over leading spindle on the press and the anvil moves sliding over this leading spindle. On every moving down of the leading spindle angled friction plate brings up against anvils and interlace. Anvil parts in tandem slide one to another. Here spindle moves to inclined position and performs shift. Finally angled friction plate moves to vertical position. It performs it to hold the progressive slip. Here angled friction plate is used to reduce friction of slide, the part quickly erode for having less lubricant and not reducing sufficiently the friction stress because of not embodying graphite within. In Chinese Patent No. 101664885 , too, the invention is about a v-shaped block component. It is characterized by grooves on the surface of the part. Production of the part is as follows. First V-shaped surface is gouged. At later stage hard alloys are placed to processed grooves and fixed. Finally V-shaped surface is grinded. Extraordinary dressibility featured hard alloys protect surface of v-shaped block from abrasion. However hard alloys used in here are costly and also friction energy on the surface reaches high levels. In European Patent Application No. EP 2123923 A1 , too, a self-lubricating bushing structure is explicated. Bushing structure embodies a bushing made of porous structured material with a lubricant grease transfer and absorb. In the middle of bushing there is a driveshaft bore and shaft part of any motor passes through the bore. Grooves on the part hold grease within. When shaft begins to spin lubricating lubricant grease begins to lubricate shaft appearing within porous structure. When shaft stops its rotation grease is again drawn to grooves. Disadvantage in here is that the part needs to contain an extra lubricant liquid to be able to lubricate. This increases both production and maintenance costs of the part and thus the maintenance costs of the machine the part will be used in as well. US Patent No. 2004/0025561 A1 discloses a self-lubricating v-driver according to the preamble of claim 1.
The invention both is an alternative to the above patents and reduces the costs of use of the technology available today. Normally self-lubricating parts are manufactured from high-strength manganous bronze and discarded as abraded. The invention reduces the use of the bronze material and also gives the opportunity of use of the part without compromising friction and lubricating properties of the material.
These objectives are achieved by means of a self-lubricating v-driver according to claim 1.

Explanation of Figures:

Figure 1: Front view of v block female part of our invention
Figure 2: Top view of v block female part of our invention
Figure 3: Front view of v block male part of our invention
Figure 4: Top view of v block male part of our invention
Figure 5: Perspective view of v block male part of our invention
Figure 6: Front view of v block friction plate of our invention
Figure 7: Top view of v block friction plate of our invention
Figure 8: Perspective view of v block friction plate of our invention
Figure 9: Front view of mounted v block of our invention
Figure 10: Top view of mounted v block of our invention
Figure 11: Front view of different design v block and angled friction plate of our invention
Figure 12: Perspective view of different design friction plate of our invention
Figure 13: Top view of different design friction plate of our invention

Description of References:

1.: Male Block
2.: Female Block
3.: Angled Friction Plate
4.: Lubricant Graphite Parts
5.: Grooves
6.: Assembly slots

Description of the Invention:

The invention is about a self-lubricating v-block and friction plate component between male and female parts of this block in mould components of mechanical presses used in shaping of metal sheet parts used in the vehicle bodies in the automotive industry and having; Male Block (1), Female Block (2), Angled Friction Plate (3), Lubricant Graphite Parts (4), Grooves (5) and Assembly Slots (6).
Normally v block used in mould components of mechanical presses consists of 2 parts and while male part is manufactured from bronze material female part is manufactured from stainless steel and CK45 etc. steel material. However in both materials discarded as abraded, with disposal of also female and male part great material losses take place and every discarded part makes both producer and consumer companies live great losses and costs.
Normally angled friction plate used in mould components of mechanical presses consists of 2 parts and while one part is manufactured from bronze material other part is manufactured from stainless steel and CK45 etc. steel material.. However in both materials discarded as abraded great material losses take place and every discarded part makes both producer and consumer companies live great losses and costs.
The invention together with being solution to all these disadvantages all mechanical properties of the segment remain unchanged. V block part has male block (1) and female block (2) both blocks are manufactured from stainless steel or CK 45 , %0,45 C steel. An angled friction plate (3) is used between both parts and with friction between male block (1) and female block (2) angled friction plate (3) is worn out. Angled friction plate (3) is manufactured from SAE 430 B, AMPCO 25 + Graphite etc. high manganous content thus parts which have high strength and work at low speeds are used in bronze alloys or sinter surface (Fe-Ni, Cu-Sn etc.) steel friction plate. In classical methods male block (1) is manufactured from complete bronze material and as the part is worn out together with male block (1) female block (2) is also discarded completely and great costs were declared to the consumer. The invention being a remedy to all these problems draws the amount of discarded parts of bronze to lower levels.
Male block (1) together with not having lubricant graphite parts (4) on it, angled friction plate (3) which is mounted on male block (1) contains it. Angled friction plate (3) being made of sintered steel material lubrication property can be brought in this way. Female block (2) together with angled friction plate (3) mounted on male block (1) rubbing against each other move in vertical or horizontal axis. Together with friction in the course of movement angled friction plate (3) on male block (1) with heating up of lubricant graphite parts (4) over it or angled friction plate made of sintered steel material is activated unleashes oil and minimizes wear on both blocks. By means of angled friction plate (3) with lubricant graphite parts (4) or made of sintered steel material owing to self-lubricating feature stopping the mould extra maintenance for lubrication is not required. For this reason production can be made more swiftly.
In conventional cam units angle and direction are standard. It does not offer alternatives different from specified in the catalogues to the user. Revisions made in the moulds or at changes like direction, angle etc. new cam units are needed to be bought for each variable. As for moulds where V block unit is used, only male block (1) on v block, female block (2) and angled friction plate (4) between them are changed according to new values angle, direction etc. specified by user v block can be repositioned and used without an extra cost.
Plates which are used in cam units are custom-engineered for each cam. As for angled friction plates (3) used in v blocks produced by us are standard, continuous in terms of manufacturability.
As required by nature of cam units steel or steel casting materials are used. Putting plates to surfaces for lubricating is a necessity for working of cam surfaces on each other. In case of plates worn and unable to perform duty complete cam unit is in the position of change. As for in changeable angled friction plates (3) used in v blocks instead of using a complete bronze v block, in order to reduce costs and to offer more economical solutions surface to provide friction is made of Bronze+Gr, Ampco25+Gr or sintered steel material as for at the bottom steel which is a % 90 cheaper material compared with bronze is used. In case of abrasion of used angled friction plates (3) only angled friction plates (3) are replaced, by means of thermal processing applied to the steel surfaces deformation of steels does not occur. Because only angled friction plates (3) on the surface are replaced in replacement processes mounting coordinates of v block does not change and extra time loss for repositioning and assembly is not experienced. As for during the replacement of cam units re-adjust of coordinates and test of whether it works properly or not in specified coordinates are needed. This is reflected as an extra time loss to users.
Grooves (5) positioned in the middle of both male block (1) and female block (2) on v blocks in terms of comfortable fitting to each other of male block (1) and female block (2) and assembly of parts to the mechanical press are very important. Assembly slots (6) on the sides of grooves (5) on male block (1) are also used during the assembly of friction plate (3) to male block (1), in order to avoid coming loose during friction or work of the part under various loads are positioned to male block (1).

Claims

A self-lubricating v-driver for molding members of mechanical presses used for shaping metal sheet parts used in vehicle frames in the automotive sector, comprising:
a v-driver male block (1),

a v-driver female block (2),

two cam dwells (3),

lubricating parts being included in the cam dwells (3), and holes (5) located in the middle of the male block (1),

characterized in that:
the cam dwells (3) are mounted on the male block (1),

the lubricating parts are lubricating graphite parts (4),

holes (6) are included in the v-drive male block (1) and are used while assembling the cam dwells (3) on the v-drive male block (1), holes (5) are located in the middle of the female block (2), and

the male block (1) comprises two supports for positioning the cam dwells (3).
The self-lubricating v-driver according to claim 1, wherein the male block (1) is made of steel material instead of bronze and the cam dwell (3) is a bronze cam dwell (3).
Use of the self-lubricating v-driver according to anyone of claims 1 to 2 in molding members of mechanical presses used for shaping metal sheet parts used in vehicle frames in the automotive sector.