Auto Hydraulic Press Machine Big Hydraulic Machine
Horizontal type briquetting press belongs to the inclined four-column sectional transverse extrusion cold-pressing forming equipment, which is different from the vertical four-column gravity blanking of the vertical briquetting machine, the large-volume loose waste packing of the horizontal packing machine, the sectional cutting of the heavy plate of the gantry shear, and the horizontal cutting of the small miscellaneous materials of the box shear. This machine is dedicated to solving the continuous pretreatment scene of multi-machine tool parallel centralized chip production, high-winding filamentous wet chips, multi-material mixed oil-containing fine chips, and is the supporting special equipment for precision machining industrial park, auto parts automatic assembly line and non-ferrous metal smelting plant.
Extrusion process
The whole set of PLC sequential automatic working procedure is divided into five linkage links of closed spiral scattering and feeding, inclined cavity pre-locking and pre-pressing, layered infiltration and oil filtering, sectional multi-stage horizontal high-pressure pressure maintaining and lateral non-contact briquette pushing and discharging. Relying on the gravity self-flow oil filtering of the inclined mold cavity, the pain points of oil contamination siltation mold cavity and briquette residual oil exceeding the standard of the ordinary horizontal machine are solved:
1. Side-mounted lengthened variable-pitch spiral scattering and feeding mechanism
A variable-pitch spiral blade is arrange in that feeding barrel, the front section is wide in pitch and quickly convey the fluffy and wound long aluminum wires and steel shavings, the rear section is narrow in pitch and is used for extrude and emptying the air in the gap between the chips to automatically break up the filamentous chips which are mutually wound into a group, so that the vertical equipment gravity silo is prevented from bridging, blocking and stopping; The whole spiral cylinder is fully enclosed, so the cutting oil will not splash from the feed inlet to pollute the floor of the workshop. It is equipped with a liquid level sensing anti-overflow probe, and the feeding is automatically suspended due to excessive accumulation of chips.
2. Inclined cavity front two-way lock material airtight bin
Aftert material slides into the incline die cavity, the upper and lower groups of small material-locking oil cylinders are synchronously close to form a completely closed compression space, the material-locking stroke is self-adaptive to the fluffiness of the chips, the thin and fine chips are slightly locked, and the long-wound thick chips increase the material-locking stroke;
Different from the old horizontal briquetting machine, which only has a single cylinder to block the material in one direction, the loose crumb material rebounds and overflows during high-pressure extrusion, which greatly improves the filling amount of single feeding and shortens the cycle time by 20%.
3. Inclined cavity gravity layered infiltration oil filtration
The whole die cavity inclines to the discharge end by 12 degrees, the extruded and separated cutting oil automatically flows downwards and forwards by gravity, passes through the double-layer detachable wedge-shaped filter screen at the bottom of the die cavity, intercepts metal micro powder in layers, and the clean oil flows into the large-capacity oil collection bin at the lower part; The oil in that traditional horizontal flat die cavity is deposite at the bottom of the die cavity, and the briquette block absorbs the residual oil for the second time, so that the residual oil rate of the for briquette block of the machine is stable to be less than or equal to 1.8%, and the deoiling rate can reach 96%, which is far higher than deoiling upper limit of 88% of the common flat horizontal type machine.
4. Sectional multi-level servo voltage regulation and high pressure maintaining logic
The hydraulic system is divided into three sections of low pressure evacuation, medium pressure preforming and high pressure deep compaction for independent oil supply. The servo valve collects the resistance of materials in the mold cavity in real time and automatically adjusts the pressure and pressure holding time: the high pressure holding time for soft materials such as aluminum chips is shortened to 6 seconds, the pressure holding time for hard fine materials such as cast iron and stainless steel is extended to 15 seconds, and the forming density interval span of the same tonnage equipment is larger. The density of the aluminum briquette can reach 5.1 t/m³, the density of the iron briquette is 6.4 t/m³, there is no layered hollow inside, and the oxidation burning loss in the furnace is reduced by 17%.
5. Lateral suspension type non-contact briquette pushing and discharging
After the completion of pressure maintaining, the main cylinder retracts slightly to unlock, and the independent suspension pushing cylinder at the side horizontally pushes the complete cylindrical briquette. The pushing head does not contact the oil filter screen of the mold cavity, so as to avoid the blockage and oil leakage caused by scraping the filter screen. The briquette slides down to the collection area along the inclined slideway by its own weight, and the whole process does not require manual material taking. The continuous cycle is uninterrupted, and the single complete cycle is only 28 – 42 seconds.
Adaptable raw materials
1. Multi-machine tool parallel hybrid filamentous oil-containing chip:long aluminum coil shavings of a numerical control lathe, steel wire wound by a milling machine, and cop spiral cutting materials are mutually wound into a group, and vertical equipment is extremely easy to block that materials;
2. High oil content multi-material mix fine chips: cast iron fine pow with a large amount of emulsified cutting fluid, stainless steel grinding chip and magnesium alloy light and thin shavings, which have strict requirements on oil removal rate;
3. The shred pretreats the mix crushed scraps: the metal shredder produce short crushed mixed steel and aluminum scraps and small stamping corner fine materials, which need to be deoiled and formed with high density synchronously;
4. Light and thin non-ferrous metal soft chips: pure aluminum and copper oil-free thin chips need to be formed at low pressure to avoid cracking and oxidation of briquettes.
