For example, from civil electric appliance and household electric appliance to electric appliance of national defence and war industry, from communications and transportation to petroleum and chemistry industry, especially, the nuclear power has important significance for our country and even for whole human. The hydraulic ram press is not only a main equipment which can press and manufacture the closure head of boiler, the vessel cylinder of petroleum and chemistry industry and the parts of nuclear power equipment, but also can complete the work of bending, correcting, forming, drawing, final finishing and impact cutting. Our company is an enterprise which is appointed by the Department of Machinery and Electricity to develop and produce the ram press. For many years, the science and technology personnel in our company, through painstakingly designing and carefully constructing, have produced various of hydraulic ram presses which have many sizes and different usage. At the same time, combining the peculiarity of single and small batch production of our company, we have also designed and manufactured other type of special ram presses.

 

     A great number of employees of SHMG have wholehearted and warmhearted service spirit and SHMG has very good reputation among users. In the following part, different types of hydraulic ram presses produced by our company will be introduced .

 

1.       YC-D hydraulic ram press£º

 

     Mainly used to make cold bend, straighten or hot press small and middle sized parts. Structure features: The press has a C type framework structure. It is made up of base, bracket, upper crossbeams, big pulling posts, small pullings post and nuts. The base, bracket, upper crossbeam are connected all together through two pieces of big pulling posts and two pieces of small pulling posts and nuts. Two vertical cylinders are fixed on the upper crossbeam and horizontal cylinder is fixed in the bracket. To prevent wrong moving between the base and the beam, the plane key is mounted between the crossbeam and the bracket. The operation system adopts a small handle that is a silicon-controlled electric appliance of control transformer. The use of the press is agile and convenient and is ideal machine for processing parts for petroleum and chemistry industries and automotive industry.

 

2.       YCH hydraulic ram press£º

 

     This press is suitable to correct and bend steel plate under relatively big eccentricity and to straighten other section material. The press is made up of ten parts of main body, pipeline, enclosure of cover board, enclosure rail of base ladder, lubricating mechanism, tool, control console etc. The crossbeam and the base are connected together by using upright post and half-nut .It forms an integral frame and forms a closed bearing system. The movable beam is slid on the upright post through adjusting guide bush. Owing to the relatively big eccentricity, the press is equipped with stress protecting device for upright post and moving working table. The control adopts small handle used for silicon-controlled electric appliance of control transformer and its control is convenient and agile.

 

3.         2 YCH hydraulic ram press£º

 

     Mainly used to press closure head of boiler, outer shell of rolling stock and spacecraft engine, cylinder part of container for petroleum and chemistry industry. Its structure feature and composition are same as the YCH, but have their own¡¯s particularity. For structure aspect, there are two type of 3 beam 4 post and pre-stress frame. According to the different usage, 3 beam 4 post type can also separate into two type of middle sliding block type and double deck beam type. This press mainly presses plate part and needs to setup edge pressing device. The edge pressing force can be make stepless regulation. Sometimes uncut edge is required to cut after pressing, so it also needs blanking device. On the base, there are single moving working table and knockout device. The control system is divided into two kind of oil and water control mode. Water control mode adopts a small handle, which is a silicon-controlled electric appliance of control transformer, and oil control mode adopts plug-in valve to control. The above-mentioned equipment can lighten labouring intensity, predigest technological process, reduce leakage loss, increase work efficiency and realize manual and program control, and are well accepted by users.

 

Explanation type and size

   X Y C ¡õ-¡õXXXX

            Nominal pressure£¨MNX100£©

            D-openside, vacancy post type

            B-thin plate, H-heavy plate

            ram press

            hydraulic

            2 double-acting, vacancy single-acting

 

The parameter table of YC series

Type and size	YC-D  400	YC-D  500	YC-D  800
Nominal pressure  MN	4	5	8
Liquid pressure   MPa	20	21	20
Vertical stroke     mm	800	800	800
Horizontal stroke   mm	1000	1000	1100
The Max. height of open up    mm	1150	1780	1800
Dimension of work table-board     mm	2700X1500	3000X2000	2000X2200
Working speed   m/s	0.1	0.012	0.0075~0.0015
Speed of idle stroke m/s	0.2	0.1	0.08
Equipment weight   t	704	108	143
Outline dimension   m	8.195X1.8X8.384	7.17X5.5X7.74	10.41X7.79X8.99

 

 Explanation of type and size
   Y C H  XXXX
                      Nominal pressure£¨MNX100£©
                      Heavy plate
                      ram press
                      hydraulic

 

The parameter table for YCH series of hydraulic ram press

type and size	YCH  1200	YCH  1600	YCH  2000
Nominal pressure   MN	12	16	20
Liquid pressure    MPa	32	20	20
Working stroke    mm	1000	1800	1500
The Max. height of open up         mm	1700	2500	2200
Dimension of work table-board    mm	800X850	3900X6500	3000X4000
Gap between posts  mm	1600X1300		2000X3800
Working speed  m/s	0.3	0.015	0.08~0.1
Speed of idle stroke m/s	0.5~0.6	0.135	0.25
Equipment weight   t	208	319.7	466.5
Outline dimension  m	11.99X5.79X7.53	19X8.595X13.075	26X14X11.03

 

The parameter table for 2YCH series of hydraulic ram press

Type and size		2YCH  0507	2YCH  0812	2YCH  1620	2YCH  3140	2YCH  1622	2YCH  3844
Total nominal pressure MN		7	12	20	40	22	44
Pressure of main cylinder   MN		5	8	16.5	31.5	16	38
Pressure of edge pressing cylinder MN		2.5	4	3.5	10	6	6.4
Pressure of knockout cylinder MN		2	2.7		5	3.4	3
The Max. working  peed m/s		30	50-75	60	50-75	50-75	60
Liquid pressure		20	20	20	20	20	20
Center distance of upright post mm		2500X1600	4400X2200	3200X1500	6000X3200	4800X2400	4000X2600
The Max. height of open up mm		2400	3300	2200	4500	4000	2500
The Max. working stroke mm		1400	2000	1200	3000	2500	1500
Dimension of table-board mm		¦Õ2000	¦Õ3800	3700X2400	¦Õ500	¦Õ4100	3000X4500
The Max. eccentricity mm		100	150	100	200	150	200
Outline Dimension mm	L	14000	15780	15570	£¨21500£©	20690	15354
	W	11000	13130	9920	£¨16500£©	15030	6700
	H	10700	14662	4920	£¨14700£©	17500	14527
Height above ground   mm		6700	9670	6.68	13150	11500	9725
Depth under ground   mm		4000	4992			6000	8000
Gross weight  t		169.2	342	234.5		490	860