1. Main Technical parameters
|Weight of falling parts||Kg||1700|
|Max hit number||min-1||90|
|Max. close die height (without dovetail)||mm||370|
|Min. close die height (without dovetail)||mm||180|
|Working oil pressure||Mpa||18|
|Main motor power||Kw||55|
|Height above floor||mm||4570|
|Total height of hammer||mm||5275|
2. Main supply range of machine
Part of hammer frame: frame, “X” shape guide rail, bottom die holder, ram, hammer rod,
connection components between ram and hammer rod and wedges etc.
Part of hydraulic station: oil tank, accumulator, lower sleeve assembly, motor-pump
combination, pilot unloading valve, hose combination, oil filter,
valve block, hitting valve and its pilot unloading valve, other
hydraulic valves etc.
Part of electric: electric control cabinet, button panel, PLC automatic monitoring
Part of numerical control: numerical control system, touch screen.
Part of operating: foot-pedal.
Part of pipe: pipe line supporter, oil pipe, cut-off valve.
Part of cooler: Electrical cooler.
Part of lubrication: lubrication pump, oil separator, lubrication oil pipe and
Part of spare parts: one set of spare parts
Part of wearing parts: two sets of wearing parts.
Part of vibration absorber: one set of vibration absorber.
Part of hydraulic ejector: one set of hydraulic ejector.
2.1. One set of spare parts for CNC forging hammer.
2.2. Two sets of wearing parts for CNC forging hammer.
3. Main outsourcing parts list
|Series No.||Purchased parts||Manufacturer|
|1||Electrical cooling system||China|
|2||Vibration isolation system||Qingdao Gerb|
|6||Plunger pump||Beijing Huade|
|7||Sealing ring for ram||Dichtomatik|
4. Main part list
|1||hammer rod||40CrNiMoA forging|
|3||die holder||42CrMo forging|
Ⅲ. Duty and responsibility of both parties
1. Duty and responsibility of the buyer:
(1). Make the foundation and the construction of the pipeline for
CNC fully hydraulic die forging hammer. (Seller offer the drawing)
(2). Buy power wire from power supply to electrical cabinet.
(3). Buy the hydraulic oil (H-LM46 anti-wear hydraulic oil) and
(4). Offer welding equipments, oxygen gas and acetylene cutting
machine, hydraulic jack, oil filter machine, electric drill and
other common tools.
(5). Unload them when the machine arriving in customer’s company,
and provide lifting equipment when installing the machines.
(6). Make dies for CNC fully hydraulic die forging hammers.
(7). Bear the board and lodging and transportation costs (including
the international round-trip tickets) of seller’s engineers and
translator during the period of supervising the installation and
(8). The buyer should abide the operating and maintenance
regulations strictly during run the machine, it’s not allowed to
overweight and overloading etc violation operating to run the
machine, the loss due to violation operating should be borne by the
(9). Keep the secret of seller’s machine technology.
2. Duty and responsibility of the seller:
(1). Provide qualified CNC fully hydraulic die forging hammer,
which should meet the requirements of technical parameters.
(2). Provide the foundation drawing for CNC fully hydraulic die
(3). Provide English operation manual, packing list and certificate
(4). Supervise the installation and commissioning and bear domestic
round tickets when installation and commissioning.
(5). Provide technical guidance during the machine lifetime.
(6). Train the operating and maintenance workers for free during
the period of supervising the installation and commissioning.
The detailed technical training is as following:
Study the working principle of CNC fully hydraulic die forging
Study the operation methods of CNC fully hydraulic die forging
Study the routine maintenance and periodic maintenance of CNC fully
hydraulic die forging hammer.
Study analysis and solving of the common fault of CNC fully
hydraulic die forging hammer.
Study the replacement of wearing parts of CNC fully hydraulic die
Study die installation and fixing means of CNC fully hydraulic die
Notice: If there is any problem caused of this current agreement, the
sides will use the International Business Law.
Working principle of CNC fully hydraulic die forging hammer
CNC fully hydraulic die forging hammer adopts motor-oil-accumulator
driving, bottom cavity of oil cylinder connects with the
accumulator constantly, the pressure is constant pressure. The
control system only controls the top cavity. Inlet valve of top
cavity (also called blow valve) open, the high pressure oil from
oil pump, accumulator and bottom cavity (which absorbed by
differential circuit) comes into top cavity, makes the ram fall
down quickly and finishes the blow action. Once the top cavity
releases the pressure, the ram will move up quickly. The precise
control of blow energy is realized by controlling the closing time
of blow valve.
VI. Features of CNC fully hydraulic die forging hammer.
1. Hit energy can be controlled accurately
Hit energy can be controlled at ±1.5%. After testing 4 copper
columns, deviation in height is ≤0.3mm. If input different die
height, the system can automatically adjust parameters to assure
energy’s identity and accuracy.
2. Hit procedure can be controlled by digitization
It can save up dozens of forging craftwork program, and it is
compatible all kinds of forgings craftwork library. So the
operation is easy, usage is convenient.
3. Forging precision is high
Hammer frame adopts “X” shape guide rail, the clearance of guide
rails is small. It also increase the vertical, horizontal and
capsize stiffness of hammer frame, which ensures the guide
precision of hammer head, so it can accomplish precision close-die
“X” shape guide rail
4. Hit frequency is high
By adopting big hammer head and short stroke structure, the hammer
can greatly increase hit frequency on the base of ensuring enough
energy. Practice proves that it can increase more than 40% than
ordinary close die forging hammers.
5. Hammer and die life can be increased greatly
Because the energy can be controlled accurately, hitting energy can
be used on forgings efficiently, no excess energy can be used to
cold hit dies and damage dies.
6. Material using rate is high
Because the guide rail clearance is small and die mismatch is
small, the forging precision is high and forging flash is small,
the material using rate is high.
7. Low noisy and low vibration
“U” shape solid casting frame produces lower hitting noise than box
type and arch column frame.
Adopting vibration isolation device can decrease 90% vibration.
8. Hammer rod life is long
Adopting thin hammer rod, the hammer rod and hammer head forming
elastic buffering structure, make the hammer rod change from
wearing parts to be long time use parts.
9. Dies can be changed and adjusted safely, easily and quickly
The hammer has slow ascend and slow descend action, which can stop
at any position, this make it very safely, easily and quickly to
change the dies. Because the upper die and lower die adopt double
wedge structure, which can adjust dies to left and right align,
aligning key can adjust dies’ front and back to satisfy all kinds
10. Forging quality is more reliable
It can save up dozens of forging craftwork program, and it is
compatible all kinds of forgings craftwork library. For one kind
forging, it can be got the same hitting energy and hitting number
to avoid manual operation variety, so forging quality is more
11. Easy to realize automation production
Hitting procedure and energy can be achieved by CNC control, so it
makes a good base for robot to put on and lay off materials
automatically, and automatic product line can be achieved easily
VII. Structure of C92K CNC Fully Hydraulic Closed-die Forging
(1). Hammer frame
Adopt “U” type hammer frame, provide strong rigidity. Two upright
arms have wide “X” shape guide rail, which makes ram not been
blocked at any time. The power head of the hammer is on the top, so
machine occupies smaller area. Frame adopts excellent material,
combine anvil block and two columns, which increased the rigidity
on longitudinal, cross direction of the upright column and insure
the accurate guide of ram.
As we know, the ram hits high temperature work piece for long time,
the temperature is very high, the volume will be inflated. If adopt
the traditional comb guide rail, should increase the clearance
between sliding rail and ram to avoid ram been blocked, but if the
guide clearance of closed die forging hammer is bigger, it will
affect the forging accuracy. In order to solve this problem, we
designed the "X" shape guide rail, the ram is radial heat expansion
when it turn to be hot when begin forging, so this will not affect
the guide clearance after the temperature rising,.
Ram is forged by high capability open die hot forging press, which
ensured the forging quality. Excellent heat treatment technology
and methods ensured the inner quality and sufficient hardness of
Ram guide face and dovetail face is heat treated by high frequency
hardening to reach HRC48-52, improving the wear resistance of the
rail surface, and eliminating dovetail face deformation and
Dovetail groove base adopts arc smooth transition, reduce
concentration of stress, and increase the intensity of ram.
(3). Hammer rod
Hammer rod material is 40CrNiMoA, and its mechanical property can
get to δb ≥800Mpa,δs≥500Mpa, which capacity is more excellent than
40CrNi and 35CrMo.
Before and after heat treatment, the hammer rod will be ultrasonic
tested as per GB/T4162-92 specification to detect the flaw.
Ram piston adopts braze-weld, hammer rod adopts high toughness and
strength, after special integral heat treatment to lengthen the
life of hammer rod.
The external surface of hammer rod adopts rolling depression,
surface roughness gets over 0.8. In the meantime, the surface forms
hardened layer increasing wear resistance greatly, it solved that
sealing rings are wear out failure out of time and enhanced the
life of sealing rings.
The seal rings of hammer rod adopt Germany Dichromatic seal rings.
(4). Hydraulic station
Hydraulic system adopts oil pump-accumulator group drive, the lower
cavity of main cylinder is connected with accumulator all the time
.The hydraulic system just control the upper chamber, through
controlling the closing time of hit valve realizes the size of hit
energy, hit valve is two stage control valve, first-level lead
valve is a two-position three way directional control valve, the
system requires high quality for it, should have high-frequency and
also require high repeat accuracy.
Using top set structure, the internal oil route sealed on the main
valve block, such structure caused the hydraulic system realized
the integration, compare with oil tank adopted side set type, the
piping system length reduce greatly, the energy loss reduced above
1 time, in addition through the integration, the oil route
connection realized no tube connection, increased the connection
In the hydraulic system has established a safety valve between the
accumulator and the bottom chamber, once hammer rod break from
middle, cut-off the bottom chamber oil and accumulator immediately,
thus enhanced the degree of security of operation.
The oil tank is top set type, the tank body is weldment, which uses
the CO2 protection welding, conforms to JB/T5000.3-1998 and
ZQ4000.3-86 "Welding General Specification Requirement" the
concerned requirements, the tank body conforms to the
JB/T5000.12-1998 concerned requirements after the surface
·Flaw detection after the oil tank welding to avoid the oil
The hydraulic station box-body establishes reinforcement bar
partly, causes the box body intensity to be high; The
high-pressured oil route channel is unimpeded, the fat liquor
resistance was small, heat gives off was few, enhanced the
(5) Ejection system
CNC forging hammer equipped with ejection system, include ejector
hydraulic station and ejector, ejector is installed in the die
seat, can choose auto ejection and pedal ejection at will.
(6). Electrical cooler
Electrical cooler:Collect the cooling, heat and precision filter
three large function
And has the remote control, filter chock warning functions and so
on, thus guarantee the C92K CNC fully hydraulic die forging hammer
The advantage of electrical cooler is excellent cooling effect,
high aptitude, space saving, energy saving and environment
(7). Lubrication part
The self-lubrication device also can be adjusted by customer’s
requirements, the adjustment is also the touch screen adjustment
input, like how long the lubrication pump work. It can adjust by
the user according to the actual situation.
(8). Vibration isolation foundation part
Foundation of C92K CNC fully hydraulic die forging hammer adopts
Germany GERB vibration absorber.
The feature of the vibration isolation foundation:
1) The size of base reduce more relative fixed support, leave out
crossbar beam, embedded part, saved the foundation cost and the
construction time, maintenance facility.
2) The vibration isolation effect is good, it can reduce vibration
3) The using life is about 30-50 years, so no need rework.
4) Reduce the vibration level of machine self and around equipment,
reduced the failure rate of hydraulic press system and electro
The compose of the vibration isolation device:
This system is composed of spring and stagnant damper
The function of spring is to supply elasticity cushion, reduce
system natural frequency. It adopts helical spring, this spring
bear high and elasticity large.
VISCO® stagnant damper have in the macro viscosity liquid cylinder
body and a special shape plunger insert into liquid, the plunger do
movement transform the mechanical energy into the heat energy in
the liquid, this make the shock motion of forging hammer weaken to
zero. Regarding attacks equipment, can absorb the impacting energy,
make the equipment tends to be stable rapidly after the equipment
was subject to the impact disturbance, guaranteed forging hammer's
impact vibration completely steadily before next time hit, the
forging hammer cannot have double hit resonating. Distance forging
hammer 10, the ground oscillator measurement curve (refers to the
Ⅷ. Manufacture capability
1. The machining precision of hammer frame is important,especially
the degree of symmetry of “X” Type guide rail side and the
uprightness degree of coattail side,affect the assemble quality
directly,in order to ensure the precision,technologist study out
the detail machining project and check method,use the large CNC
floor type boring machine completed the relate machining
step,achieved the requirement of drawing set.
2. The precision of hit valve and two stage lead valve is the key
for energy precision control,all the key machining completed with
CNC machining equipments.
Hammer head, main valve block etc machined on CNC machining
equipments, ensured the machining quality of them.