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Open Front Fixed Bed Press With Hydraulic Overload Protector
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Open Front Fixed Bed Press With Hydraulic Overload Protector

Open Front Fixed Bed Press With Hydraulic Overload Protector

Xuji JH21 series, a versatile crank press and frame press, is designed for precision stamping, combining mechanical and hydraulic technologies. The core advantages of this crank press include hydraulic overload protection, automatic overpressure relief alarm, and maintenance cost reduced by 50%. The high-rigidity welded body of the c frame press machine is treated with aging, and the rigidity is increased by 30%. The six-sided guide (eight-sided guide for XJH21-315B/400B) rail ensures the positioning accuracy of the slider is ±0.02mm. The pneumatic double balance cylinder of this frame press reduces impact noise and extends the life of the mold. Siemens motor drive, pneumatic clutch response is fast, and gears are oil-immersed lubricated in this crank press. Imported PLC control supports multi-mode stamping, standard two-hand operation and photoelectric protection, and optional automation module for the c frame press machine. Nominal force 160-4000kN, stroke 25-135 times/minute, suitable for the automotive, home appliances, and electronics industries, excellent complex surface forming performance, performance improved by 40%.

Information

Open Front Fixed Bed Press with Hydraulic Overload Protector | High-Precision Stamping Press Solutions

Xuji JH21 series, a versatile crank press and c frame press machine, serves as a high-performance Mechanical Fixed Bed Press Machine, designed for precision stamping by integrating mechanical and hydraulic technologies. This Hydraulic Overload Protected Press also features the stability of a Non-inclinable Power Press, making it a reliable choice for high-precision processing. The core advantages of this crank press include hydraulic overload protection, automatic overpressure relief alarm, and maintenance cost reduced by 50%. The high-rigidity welded body of the c frame press machine is treated with aging, boosting rigidity by 30%, while the Non-inclinable Power Press structure ensures no operational deviation during high-speed stamping. As a Mechanical Fixed Bed Press Machine, its fixed bed design enhances stability, and the six-sided guide (eight-sided guide for JH21-315B/400B) rail guarantees slider positioning accuracy of ±0.02mm. The pneumatic double balance cylinder of this crank press reduces impact noise and extends mold life, with Siemens motor drive, fast pneumatic clutch response, and oil-immersed lubricated gears. Imported PLC control supports multi-mode stamping for the c frame press machine, with standard two-hand operation, photoelectric protection, and optional automation modules. This Hydraulic Overload Protected Press covers nominal force 160-4000kN and stroke 25-135 times/minute, excelling in complex surface forming with 40% performance improvement, suitable for automotive, home appliances, and electronics industries.

I. Core Advantages of Open Front Fixed Bed Press with Hydraulic Overload Protector

1. Innovative Hydraulic Safety System for Safe Operation

This Hydraulic Overload Protected Press, as a reliable Non-inclinable Power Press, adopts an advanced hydraulic overload protection device to monitor pressure load in real time, avoiding equipment damage or workpiece scrapping. Compared with traditionalcrank press models, its safety performance is improved by over 40%, ideal for high-precision stamping on a c frame press machine. The Mechanical Fixed Bed Press Machine structure further complements the safety system by maintaining stable load distribution during overload scenarios.

2. Open Structure & High Rigidity Body Design

The open C-shaped body of the c frame press machine provides 270° operating space, facilitating mold installation and material handling. As a Non-inclinable Power Press, it avoids angle-induced precision loss, while the high-rigidity steel plate welded body ensures stability for the Mechanical Fixed Bed Press Machine during high-speed operation. This design synergizes with the crank press mechanism to deliver consistent stamping quality, supported by the safety guarantee of a Hydraulic Overload Protected Press.

3. Intelligent Control & Multi-Mode Switching

Equipped with a PLC control system, this crank press supports single, continuous, and inch operation modes. The c frame press machine allows precise adjustment of pressure and stroke parameters to meet diverse production needs. As a Mechanical Fixed Bed Press Machine, it maintains parameter stability during long-term operation, while the Non-inclinable Power Press structure ensures control accuracy is not affected by machine inclination. The Hydraulic Overload Protected Press integrates control system data to trigger real-time safety responses.

II. Technical Features

1. Core Structure & Safety

High-Strength Welded Steel Frame: The Mechanical Fixed Bed Press Machine adopts a rigid one-piece construction, ensuring stability for the Non-inclinable Power Press under 315T-400T extreme tonnage.
Hydraulic Overload Protection System: This Hydraulic Overload Protected Press features an auto-release mechanism to prevent die damage in overload scenarios, compatible with the crank press drive system.
Enhanced Guidance System: JH21-315B/400B models of the c frame press machine use eight-sided extended linear guides; standard models adopt six-sided hardened guides, matching theNon-inclinable Power Press’s precision requirements.

2. Drive & Control System

Premium Power Transmission: The crank press is equipped with a SIEMENS motor, dry-type pneumatic friction clutch/brake, and oil-immersed helical gears for low noise and durability, optimized for the Mechanical Fixed Bed Press Machine structure.
Precision Die Height Adjustment: JH21-16~45T c frame press machine uses manual adjustment; JH21-63T+ models adopt electric adjustment (±0.01mm resolution) for the Non-inclinable Power Press, ensuring accuracy for the Hydraulic Overload Protected Press.

3. Auxiliary Systems

Intelligent Lubrication: The c frame press machine uses electrical forced grease lubrication for the main circuit; the crank press balance cylinder has manual lubrication ports, suitable for the Mechanical Fixed Bed Press Machine’s long-term operation.
Pneumatic & Safety Components: This Hydraulic Overload Protected Press is equipped with Festo/SMC-equivalent dual solenoid valves, two-hand operation, and optional EN ISO 13849-1 certified light curtains, complementing the Non-inclinable Power Press’s safety design.
Material Handling: The Mechanical Fixed Bed Press Machine has a built-in anti-scratch sheet blowing device, with optional slide knockout and automatic feed shafts for the crank press.

4. Automation & Connectivity

Industrial-Grade Control: The c frame press machine adopts Siemens/Allen-Bradley PLC and a 7" touchscreen with pre-programmed profiles, integrated with the Hydraulic Overload Protected Press’s safety data.
Expandable Interfaces: The Non-inclinable Power Press features an IEC 61131-3 compliant electrical cam interface, enabling seamless integration with crank press automation systems.

III. Why Invest in Our Hydraulic Overload Protected Press?

1. Die Protection: As a Hydraulic Overload Protected Press, its protector acts as a "safety fuse" for molds, preventing damage from misfeeds or material variations, paired with the Mechanical Fixed Bed Press Machine’s stable load distribution.

2. Stability & Precision: This Non-inclinable Power Press’s fixed bed design outperforms tilting C-frame models in stability, enabling tighter tolerances for the crank press and c frame press machine configurations.

3. Versatility: The Mechanical Fixed Bed Press Machine supports manual and automated lines, with a wide tonnage range, while the Hydraulic Overload Protected Press adapts to diverse stamping tasks across industries.

IV. Optional Upgrades

· Wet Clutch System (for high-frequency continuous operation) for the crank press

· Air Cushion Kit (600mm×800mm working area) for the c frame press machine

· Full Automation Package: Robotic Arm Integration + IoT Monitoring for the Non-inclinable Power Press and Hydraulic Overload Protected Press

V. Hydraulic Overload Protected Press Vs Open Single Point Press

1. Safety Comparison

· Hydraulic Overload Protected Press: Integrated safety system with automatic pressure relief, reducing downtime for theMechanical Fixed Bed Press Machine and c frame press machine.

· Open Single Point Press: Relies on mechanical clutches, prone to component breakage, with higher maintenance costs than the crank press and Non-inclinable Power Press.

2. Accuracy & Application Scope

· Hydraulic Overload Protected Press: Suitable for high-precision sheet metal stamping on the c frame press machine, with ±0.02mm tolerance, supported by the Non-inclinable Power Press structure.

· Open Single Point Press: For basic processes like simple punching, with lower accuracy than the Mechanical Fixed Bed Press Machine and crank press.

3. Energy Consumption & Efficiency

The Hydraulic Overload Protected Press reduces improper operation downtime, boosting production efficiency of the frame press, crank press, and Mechanical Fixed Bed Press Machine.

VI. Application Areas & Industry Coverage

· Automotive Industry: Brake pad stamping, door hinge forming with the crank press, c frame press machine, and Mechanical Fixed Bed Press Machine.

· Electronics Industry: Connector precision blanking, heat sink processing on the Non-inclinable Power Press and Hydraulic Overload Protected Press.

· Home Appliance Manufacturing: Metal shell forming, structural parts riveting with the c frame press machine and crank press.

VII. Technical Parameter

Specification			JH21-25		JH21-45			JH21-63
			II	III	II	III	IV	II	III	IV
Nominal Force		kN	250	250	450	450	1100	630	630	630
Nominal Stroke		mm	3	3	4	4	6	4	4	4
Slide Stroke		mm	30	100	50	120	160	60	150	180
SPM	Fixed	min⁻¹	125	100	90	80	80	85	70	70
SPM	Variable (Option)	min⁻¹	100-140	80-120	70-110	40-90	40-90	70-100	35-80	35-80
MAX Die Height		mm	275	250	295	270	270	330	300	3000
Die Height Adjustment		mm	50	50	60	60	60	80	80	80
Between Slide Center and Frame		mm	210	210	230	230	230	300	300	300
Bolster Area (FB x LR)		mm	400 x 700	400 x 700	440 x 810	440 x 810	440 x 810	580x 900	580x 900	580x 900
Bolster Thickness		mm	80	80	110	110	110	110	110	110
Bed Opening (FB x LR)		mm	260 x 250	260 x 250	300 x 300	300 x 300	Φ260 x 50 xΦ220	390 x 460	390 x 460	390 x 460
Slide Area (FB x LR)		mm	360 x 360	360 x 360	340 x 410	340 x 410	340 x 410	400 x 480	400 x 480	400 x 480
Shank Hole (Dia x Depth)		mm	Φ40 x 60	Φ40 x 60	Φ40 x 60	Φ40 x 60	Φ40 x 60	Φ50 x 80	Φ50 x 80	Φ50 x 80
Between Columns		mm	450	450	550	550	550	560	560	560
Main Motor Power		kW	3	3	5.5	5.5	5.5	5.5	5.5	7.5
Air Cushion (Option)	Eject Force x Stroke	kN x mm	/	/	30 x 70	30 x 70	30 x 70	40 x 70	40 x 70	40 x 70

Specification			JH21-80			JH21-110			JH21-125
			II	III	IV	II	III	IV	II	III	IV
Nominal Force		kN	800	800	800	1100	1100	1100	1250	1250	1250
Nominal Stroke		mm	5	5	5	6	6	6	6	6	6
Slide Stroke		mm	60	180	200	80	180	220	80	180	220
SPM	Fixed	min⁻¹	85	60	60	80	50	50	60	50	50
SPM	Variable (Option)	min⁻¹	70-100	50-70	50-70	40-90	30-60	30-60	40-70	30-60	30-60
MAX Die Height		mm	360	320	320	390	390	330	390	350	350
Die Height Adjustment		mm	80	80	80	80	80	80	80	80	80
Between Slide Center and Frame		mm	300	300	300	350	350	300	350	350	350
Bolster Area (FB x LR)		mm	580 x 1000	580 x 1000	580 x 1000	680 x 1150	680 x 1150	680 x 1150	680 x 1150	680 x 1150	680 x 1150
Bolster Thickness		mm	120	120	120	140	140	140	140	140	140
Bed Opening (FB x LR)		mm	390 x 520	390 x 520	390 x 520	420 x 540	420 x 540	420 x 540	420 x 540	420 x 540	420 x 540
Slide Area (FB x LR)		mm	420 x 560	420 x 560	420 x 560	500 x 650	500 x 650	500 x 650	540 x 680	540 x 680	540 x 680
Shank Hole (Dia x Depth)		mm	Φ50 x 80	Φ50 x 80	Φ50 x 80	Φ60 x 80	Φ60 x 80	Φ60 x 80	Φ60 x 80	Φ60 x 80	Φ60 x 80
Between Columns		mm	640	640	540	760	760	760	760	760	760
Main Motor Power		kW	7.5	7.5	11	11	11	15	11	11	15
Air Cushion (Option)	Eject Force x Stroke	kN x mm	40 x 70	40 x 70	60 x 70	60 x 70	60 x 70	60 x 70	60 x 70	60 x 70	60 x 70

Specification			JH21-160B			JH21-200B			JH21-250B		JH21-315B		JH21-400B
			II	III	IV	II	III	IV	III	IV	III	IV	III	IV
Nominal Force		kN	1600	1600	1600	2000	2000	2000	2500	2500	3150	3150	4000	4000
Nominal Stroke		mm	6	6	6	6	6	6	8	8	8	8	10	10
Slide Stroke		mm	80	200	250	100	180	250	250	280	250	280	250	280
SPM	Fixed	min⁻¹	50	45	45	50	40	40	30	25	30	25	25	25
SPM	Variable (Option)	min⁻¹	40-60	25-50	25-50	40-60	20-50	20-50	25-35	20-30	25-35	20-30	20-30	20-30
MAX Die Height		mm	390	350	350	500	450	450	550	550	550	550	550	550
Die Height Adjustment		mm	110	110	110	110	110	110	120	120	120	120	120	120
Between Slide Center and Frame		mm	380	380	380	390	390	390	460	460	460	460	490	490
Bolster Area (FB x LR)		mm	740 x 1300	740 x 1300	740 x 1300	760 x 1400	760 x 1400	760 x 1400	880 x 1400	880 x 1400	880 x 1650	880 x 1650	940 x 1800	940 x 1800
Bolster Thickness		mm	150	150	150	160	160	160	170	170	200	200	200	200
Bed Opening (FB x LR)		mm	480 x 600	480 x 600	480 x 600	480 x 600	480 x 600	480 x 600	370 x 570	370 x 570	440 x 580	440 x 580	440 x 580	440 x 580
Slide Area (FB x LR)		mm	580 x 770	580 x 770	580 x 770	600 x 800	600 x 800	600 x 800	700 x 1100	650 x 920	750 x 1200	700 x 1000	800 x 1300	720 x 1200
Shank Hole (Dia x Depth)		mm	Φ65 x 90	Φ65 x 90	Φ65 x 90	Φ65 x 90	Φ65 x 90	Φ65 x 90	Φ70 x 90	Φ70 x 90	Φ70 x 90	Φ70 x 90	Φ70 x 90	Φ70 x 90
Between Columns		mm	850	850	850	870	870	920	960	1030	920	920	960	960
Main Motor Power		kW	15	15	18.5	18.5	18.5	30	22	30	30	37	37	45
Air Cushion (Option)	Eject Force x Stroke	kN x mm	100 x 90	100 x 90	100 x 90	100 x 90	100 x 90	100 x 90	160 x 90	160 x 90	160 x 90	160 x 90	160 x 90	160 x 90

VIII. FAQ

Q1: What materials are suitable for hydraulic safety open presses?

A1: This Hydraulic Overload Protected Press processes 0.1-10mm thick steel plates, aluminum alloys, and copper, compatible with the crank press, c frame press machine, and Mechanical Fixed Bed Press Machine.

Q2: How long is the equipment maintenance cycle?

A2: Check hydraulic oil every 500 hours; annual comprehensive maintenance for the Non-inclinable Power Press, crank press, and c frame press machine.

Q3: Are hydraulic safety models more expensive than open single-point presses?

A3: Slightly higher initial investment, but long-term maintenance savings and safety advantages of the Hydraulic Overload Protected Press and Mechanical Fixed Bed Press Machine improve cost-effectiveness.

Q4: Does it support customized workbench size?

A4: Non-standard customization is available for the crank press, c frame press machine, and Non-inclinable Power Press to meet special mold/workpiece needs.