The hot die presses have been used widely to the die forging production of automotive industry, farm machinery, bearing industry, valve, tool, petroleum industry, engineering machinery and national defence industry. They can complete the forming technique of die forging for parts of blades, spikes, gears, valves, dozer¡¯s scraping belts etc.

 

     Our factory develops two series of DRF and DRC hot die forging presses and can provide a single hot die forging press, die clamp of the press and other accessory machinery, such as forging roll, edge trimmer, fine press, mechanical arm and heating device, and can also provide a whole set of automatic forging production line.

 

1.      The DRF hot die forging press:

 

     It was first developed by our factory in China and has been produced for more than 30 years. More than 50 sets of the press spread all over the country and are sold to Roumania.

 

     Structure features: The DRF hot die forging press has reliable structure and its maintenance is easy. The press adopts pre-tighten framework, upper drive, double pivoted connecting rod, working mechanism with elephant sliding block of rear secondary slideway. The hot die forging press of mechanical type driven by eccentric shaft has a good rigidity and its forged piece has a high precision.

 

     The press adopts integral or combined type of pre-tighten framework, herringbone gear and one or two stage of belt drive and use narrow v-belt. Two ends of eccentric shaft are equipped with pneumatic disc or block clutch and brake, mechanical top and bottom knockout. The bottom knockout has high position holding and allows a certain holding time after forged piece is pushed out the die space, so operator will have enough time to take the forged piece out. A double balancing cylinder is used to balance the slide block. The adjustment of closed height is lower adjusting. Rising and dropping of working table is made by moving wedge block. The closed height is adjusted automatically by mechanical or hydraulic drive and is equipped with indication mechanism. The shaft and hub of the press are connected with expansion sleeve and expansion pin, so it is easy to be assembled and disassembled. The press sets up the central lubricating system of high pressure. Through oil distributor, the oil pump provides oil to each lubricating point. The lubricating system is equipped with lubricating monitoring system. The press adopts PLC control system. When working, the control system will indicate beating force, monitor lubricating system, indicate and monitor the temperature of eccentric shaft bush and connecting rod bush, control the coordinating work of the clutch and the brake and control correct stop position at upper dead point. The press has been inspected strictly and tested before be assemblied.

 

     Through continuous process of development-production-use-development, this series of press has a reasonable structure. Owning to use the new technique, its use is reliable, energy consumption is low, efficiency is high, and it meets the requirement of fast development and has the world level of the nineties.

 

2. DRC hot die forging press:

 

     Structure features: structure is compact, manufacture is easy, operation is simple, control is advanced, maintenance is convenient, press rigidity is good, product precision is high, anti-eccentric capability is high, PLC control is used. It has a whole solid cast steel framework and X slideway which gap can be adjusted, so the rigidity is good. Two ends of eccentric shaft are equipped with block type of brake and clutch. The cams of brake and bottom knockout are connected with the eccentric shaft by using expansion sleeve, so it¡¯s easy to be assembled and disassembled. The brake has cooling water. The clutch and brake are coordinated to work by electropneumatic interlock. The clutch can pass into high pressure air to increase the torque, so the press can be actuated to release from accident stop.

 

     The press is a structure of long slide block and integral connecting rod. The crank-guide pushes the slide block to reciprocate up and down. The drive of the press is one stage drive of motor pulley and adopts narrow V-belt. The closed height of the press is adjusted by using eccentric-worm gear type of upper adjusting device and balancing slide block part of double balancing cylinder.

 

      The top knockout of cam pendulum arm mechanism is installed on the slide block. It can realize the die sinking and knockout through the swing of the connecting rod. The mechanical type of the bottom knockout has high position holding and the knockout at top and bottom are reliable, so it is propitious to realize the die sinking and knockout and is easy to realize the mechanization

.

     The press is equipped with high pressure central lubricating system. The oil pump will lubricate automatically at each lubricating point through oil distributor. The press has also lubricating monitor. The press adopts PLC control system. The control system indicates tonnage in digit when forging, monitors lubricating condition for each lubricating point, monitors and indicates working temperature of bush for eccentric shaft and connecting rod, and controls correct stop at upper dead point. It has protection of safety operation and is perfect die forging equipment.

 

The technical parameter of DRF hot die forging press                         Table lÒ»4

Type and size Name      Unit			DRF 1000	DRF 1600	DRF 2000	DRF 2500	DRF 3150	DRF 4000
Nominal pressure	kN		10000	16000	20000	25000	3150	40000
Stroke of slide block	mm		250	280	300	320	340	380
N0. of stroke	Min-1		100	85	82	70	55	50
Closed height	mm		650	720	764.2	1000	950	1000
Adjusting amount of closed height	mm		14	lO	21.8	22.5	20	21.8
Underside dimension of slide block	L/R¡ÁF/B mm		800X950	900X950	930X1000	985X1100	1180X1200	1190X1360
Dimension of working table	L/R¡ÁF/B mm		900X 1080	1000X 1050	1035X 1100	1140X 1250	1280X 1350	1250X 1450
Top knockout	Force  kN		50	80	100	125	160	100
	Stroke mm		30	37	45	40	30	30
Bottom knockout	Force  kN		150	240	200	250	475	200
	Stroke mm		30	37	70	60	50	75
Main motor	Power  kW		55	95	115	135	155	185
	Revolution r£¯min		1000	1000	1465	1470	1470	980
Outline dimension	Left  Right	mm	3658	4653	4032	4245	5975	5947
	Front Back	mm	3300	3940	3785	3890	4292	5095
	Height above ground	mm	4986.5	4940	5525	5960	6119	7800
Gross weight of equipment    t			75.2	100	117	161	204.3	302

 

The dimension table of outline and installation for DRF press                                   Table lÒ»5

 

 

The dimension table of outline and installation for DRF press                Table lÒ»5

Type and size	D2	D3	a	b	d	e	f	g	h	m	n	¦µ1	¦µ2
DRF  1000	700		1300		1200	1200	270		605		270	3/¡±	11/¡±
DRF  1600	3900		1600	1600	1435	1435	300		550		300	3/¡±	2¡±
DRF  2000	2200	1000	1600	2320	600	1370	430	420	990	420	430	3/¡±	2¡±
DRF  2500	2400	500	1700	2700	1150	1300	550	500	1150	500		3/¡±	2¡±
DRF 3150			1920	2960	680	1460	655	400	1250	400	825	3/¡±	21/¡±
DRF  4000	3000	500	2140	3200	920	1550	800	600	1675	600	1060	3/¡±	21/¡±

 

Weight of the main part(t)                                                               Table l¡ª6

Size	Gross weight of press	Part of frame- work	Part of eccentric shaft	Part of slide block	Part of brake	Part of clutch	Drive part	Part of bottom knock- out	Basic part	The Max. part frame- work
DRF  1000	75	37.8	48	8.25	1.29	10.9	0£®96	1.43	2.8	36.8
DRF  1600	100	45	8	9.3	1.94	17.8	2.6	2.1	3.7	40
DRF  2000	117	64.9	7.1	11.4	2.58	10.6	7.37	2.03	5.62	45
DRF  2500	16l	92.1	10.5	16.7	2.84	15	9.92	2.85	7.01	65
DRF 3150	204.33	101.7	14.64	20.75	5.087	19.6	13.9	4.6	7.7	48.5
DRF  4000	302	163.8	20.5	28.3	6.9	25.6	15	4.5	12.2	73

The main technical parameter of DG460 forging roll                                 Table l¡ª7

	Name	Value
1	Nominal diameter of forging die   mm	460
2	Effective width of centric part of forging die    mm	570
3	Effective width of external part of forging die   mm	210
4	The Max.length of centric part of forging die  mm	710
5	Adjusting amount of roll gap                mm	17
6	Rollrevolution                  r/min	65
7	The Max. dimension of blank                mm	75
8	Motor power                   KW	22
9	Outline dimension£¨L/R¡ÁF/B¡Áheight above ground£©    mm	2840¡Á1580¡Á2258
10	Gross weight of equipment                      t	10.5

The technical parameter table of DRC series                                            Table l¡ª8

Type and size Name		DRC 1000	DRC 1600	DRC 2000
Nominal pressure	kN	10000	16000	20000
Stroke of slide block	mm	250	280	300
No. of stroke	min¡ª1	100	90	85
Closed height	mm	700	875	950
Adjusting amount of closed height	mm	14	18	20
Undersize dimension of slide block	L/R¡ÁF/B mm	820X930	1030X1260	1180X1260
Dimension of working table	L/R¡ÁF/B mm	850X1120	1050X1400	1210X1530
Top knockout	Force   kN	50	80	100
	Stroke  mm	30	37	40
Main motor	Power  kW	45	95	115
	Revolution r£¯min	1000	1000	1000
Outline dimension	L/R  mm	3744	6568	4774.5
	F/B  mm	3304	3940	4287
	Height above ground  mm	4994	5954	6390
Gross weight of equipment        t		7l	124	16

The dimension table of outline and installation for DRC press                                   Table lÒ»9

Type and size	A	B	C	Cl	C2	C3	C4	C5	D	Dl	D2	D3	D4
DRC1000	3658	3300	5000	3800	1200	1400	1600	860	5200	4800	4400	3380	700
DRC1600	4568	3940	5650	4150	1500	1550	1700	1050	5700		4800	3900	760
DRC2000	4775	4287	6000	4200	1800	1600	1800	1120	5800		5000	4000	900

 

The dimension table of outline and installation for DRC press                                       Table lÒ»9

Type and size	H	H1	H2	H3	H4	a	b	d	¦µ1	¦µ2
DRC 1000	5345	4986	2950	2670	360	1300	2400	2940	3/<4¡±>	11/<2¡±>
DRC 1600	6484	5954	3400	2989	550	1600	2870	3470	3/<4¡±>	<2¡±>
DRC 2000	7215	6390	£¾3400	3022	825	1650	2960	3600	3/<4¡±>	<2¡±>

 

The weight table of main parts (t)                                                            Table l¡ª10

Part name Type Size	Gross weight of  the press	Part of frame-work	Part of eccentric shaft	Part of slide block	Part of clutch	Part of motor device	Part of  bottom knock-out	Basic part	The Max. part Frame-work
DRC 1000	71	36.3	4.7	8.8	10.5	0.96	1.3	2.5	34.7
DRC 1600	124	64.2	8.43	16.6	17.8	2.6	2.1	3.8	61.5
DRC 2000	160.8	86.2	11.01	21.62	21.4	3.53	2.69	1.04	81.5

Oustanding achievement table of hot die forging press

No.	Manufacture£¨delivery£©time	Name and type of product	User
1	1969	DRF20000KN hot die forging press	The second automobile factory
2	1971	40000KN hot die forging press	The second automobile factory
3	1974	25000KN hot die forging press	The second automobile factory
4	1974	25000KN hot die forging press	SiChuan, ChanQing machine faqctory
5	1974	25000KN hot die forging press	HeBai,Feng Feng metal shelf factory
6	1974	25000KN hot die forging press	Support 4 sets to Roumania
7	1982	20000KN hot die forging press	The second automobile factory ; Shanghai automobile driven shaft factory
8	1979	40000KN hot die forging press	ShanXi,07unit5439factory;  Roumania
9	1987	20000KN hot die forging press	AnHui,HuangShanCity,Tun Xi high pressure valve factory
10	1987	20000KN hot die forging press	ChongQing,JianShe machine tool factory
11	1987	20000KN hot die forging press	LuoYang tractor factory
12	1987	20000KN hot die forging press	HeiLongJiang,HaerBin city,01 unit 853 factory
13	1987	40000KN hot die forging press	ShanDong,LiaoCheng,ShengJian mechanical factory
14	1987	40000KN hot die forging press	HuNan,LaoHeKou,JiangShan mechanical factory
15	1995	25000KN hot die forging press	JiangXi,XinYu forging factory
16	1993	25000KN hot die forging press	ShanDong,WeiFang diesel engine factory
17	1992	DRC10000 hot die forging press	JieLin,SiPing minisize automobile factory of the first automobile factory
18	1991	DRC10000 hot die forging press	LaiYang power machine factory
19	1995	DRC10000 hot die forging press	ChongQing city(individual)
20	1994	DRC16000 hot die forging press	JiangShu,HongBao group
21	1997	2000DRF-S20000 hot die forging press	DaLLian China-Japan The first forging limited company
22	1994	DRF20000KN hot die forging press	Jiang Yin tube element factory Xu Chang forging factory
23	1994	DRF16000KN hot die forging press	Bei Jing diesel engine factory
24	1994	DRF20000KN hot die forging press	Bei Jing diesel engine factory
25	1994	DRF16000KN hot die forging press	Shanghai  second automobile gear factory
	total	More than 60 sets