Hotman Crankshaft Grinding Machine for Compressor Crankshaft

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: G1
• Type: Special Purpose Grinding Machine
• Processing Object: Crank Shaft
• Abrasives: Grinding Wheel
• Controlling Mode: CNC
• Automatic Grade: Automatic
• Cylindrical Grinder Type: Crankshaft Grinding Machine
• Precision: High Precision
• Certification: CE, ISO 9001
• Condition: New
• Maximum Grinding Workpiece Length: 300mm
• Maximum Diameter of Eccentric Circle: 40mm
• Maximum Spindle Speed of The Head Frame: 600rpm
• Minimum Rotation Angle: 2arcsec
• Maximum Eccentricity: 15
• Maximum Torque: 210nm
• Transport Package: Wooden Box
• Trademark: Hotman
• Origin: China
• Production Capacity: 1000

Product Description

Product Description

1.Equipment Overview:
(1) Unmatched Performance:
This state-of-the-art grinding machine is characterized by its supreme precision, rigidity, and efficiency, making it a versatile choice for numerous industries. From aviation to medical, hydraulic to mold making, and from high-end automobile manufacturing to robotics, this machine excels in precision grinding of camshafts, crankshafts, drive shafts, and eccentric shafts. Its outstanding flexibility allows for a single clamping process to grind two eccentric shaft diameters and multiple eccentric diameters, ensuring unmatched performance. Whether for air conditioning or refrigerator compressor crankshafts, this machine guarantees exceptional processing excellence..
(2) Precision Machining Accuracy:
Hotman crankshaft grinders deliver impeccable grinding results, conforming to the highest standards of accuracy. These machines ensure excellence with every grind.

No.	Model	Work piece	Cylindricity	Roughness
1.	G1	Standard sample	≤0.002mm	≤Ra0.4

Note: Rough grinding typically removes 0.03~0.05mm, while fine grinding generally removes 0.01~0.015mm.

Product Parameters

(3) Technical Specifications:

Project	Parameter	Project	Parameter
Scope of work		Head frame part
Maximum grinding workpiece length	300mm	Maximum spindle speed of the head frame	600rpm
Maximum diameter of eccentric circle	40	Minimum rotation Angle	2arcsec
Maximum eccentricity	15	Repeated positioning accuracy	±2arcsec
Clamping mode	Pressure measuring fixture (Hotman custom)	Maximum torque	210NM
Grinding accuracy	Cylindricity 1.0μm	Head frame spindle power	12KW
Grinding wheel head part		Trimming part
Grinding wheel spindle type	Ball bearing motorized spindle	Dressing spindle type	Motorized spindle
Maximum spindle speed of grinding wheel	8000rpm	Trim the maximum spindle speed	8000rpm
Maximum linear speed of grinding wheel	120m/s	Maximum linear speed of trimming	45m/s
Grinding wheel spindle cooling mode	Oil cooling	Trimming spindle cooling mode	Oil cooling
Dimensions of CBN grinding wheel	250x20x25(Outside diameter x inside diameter x width)	Diamond roller size	100x32(Outer diameter x inner longitude)
Grinding wheel spindle power	13KW	Dressing spindle power	0.6KW
X-axis part (hydrostatic guide + linear motor + grating ruler)		Z-axis part
Maximum stroke of X axis	50mm	Maximum z-axis stroke	280mm
X-axis positioning accuracy	0.5μm	Z-axis positioning accuracy	3.0μm
X axis feed repeated positioning accuracy	0.3μm	Z-axis repeated positioning accuracy	2.0μm
Minimum resolution of X axis grating ruler	0.0001mm	Z axis screw precision class	C2
Maximum acceleration on the X-axis	3m/s	Maximum Z axis velocity	15m/min
Straightness of static guide	0.001/500mm	Z-axis motor power	3.0KW
Hydrostatic guide cooling mode	Oil cooling	Screw rail lubrication method	Grease lubrication
Hydrostatic guide feed system		Other
Total tank capacity	240L	Machine tool size (length x width x height)	3250X3000x2050mm
Total power of hydrostatic system	5.2KW	Total power supply voltage of the device	AC380V
Total cooling power of oil cooler	4.5KW	Control loop voltage	AC110V/DC24V
Hydrostatic guide pressure fluctuation	<2%	Total power of equipment	50KW
Oil products (two kinds)	Mobil Veros No. 6 / Amey Precision Spindle oil	Total weight of equipment (gross weight approx.)	7000KG
3 stages of filtration/accuracy	100μm/5μm/2μm	Height from the ground to the center of the work	1163mm(No cushion iron included)
Standard accessories		Optional part
Ceramic CBN grinding wheel	1PCS	Oil mist collector	1Set
Diamond roller	1PCS	Mapos P1DAE anti-collision and grinding wheel online detection system	1Set
Standard fixture	1Set	Centralized filtration system	1Set
High precision hydrostatic guide oil supply system	1Set	Grinding fluid high and low pressure control system	1Set
Oil cooler	2PCS	Special oil for hydrostatic guide	200L/Barrel
Standard hand tools and toolboxes	1Set	Spare ceramic CBN grinding wheel	1PCS
The first addition of lubricating grease	Screw rail grease	Spare diamond dressing roller	1PCS

2.Key Features:
(1) This advanced equipment is dedicated to the precision grinding of compressor industry crankshafts, camshafts, drive shafts, and eccentric shaft workpieces. With a cutting-edge numerical control system, it features automatic clamping and grinding of multi-eccentric shaft diameters, significantly boosting efficiency and reducing grinding time, while eliminating precision errors from manual tooling. Its fixed dovetail structured grinding wheel dressing device ensures accurate maintenance. The anti-collision system's on-line monitoring enhances safety and realizes a seamless dressing cycle. Utilizing hydrostatic guide rails for grinding feed, it assures high rigidity, wear-free operation, and smooth transmission, completely free of vibration, thereby elevating both positioning and machining accuracy.

Equipment Structure Diagram


Casting Analysis

(2) Robust Cast Iron Machine Tool Body
Innovative Design Features of the Bed and Main Components:
In grinding, maintaining precision is paramount, and this largely hinges on thermal stability over vibration resistance. Cast iron, with its low thermal expansion coefficient, plays a crucial role. More importantly, its heat conductivity outshines artificial granite.
Machine tools generate significant heat during use, which cast iron beds can distribute swiftly and uniformly, maintaining exceptional machine stability.
Key machine components - the grinding wheel head, workpiece head, spindle, and all bearing support structures - are crafted from high-grade cast iron or steel. This ensures a consistent thermal expansion coefficient throughout, with stable composite cast iron mitigating any brief thermal fluctuations. This results in an ideal environment for high-precision grinding, offering superior rigidity and seismic resistance compared to traditional artificial granite structures. The working surface's inclined design with a hollow drainage system facilitates the quick and efficient removal of grinding coolant.
(3) Z Axis Screw Feed:
The Z-axis feed shaft boasts a preloaded high-precision linear guide rail design, capable of handling loads from all directions. A lubrication return channel within the guide rail ensures smooth operation, minimizing friction and eliminating low-speed crawling. This design also reduces guide rail wear, prolongs service life, and significantly enhances programming accuracy. The C3 class ball screw is designed to maintain outstanding accuracy retention.

(4) Introducing the cutting-edge feature of our HOTMAN Crankshaft Grinding Machine for Compressor Crankshaft: the high-rigidity, high-speed grinding wheel motorized spindle, engineered to deliver exceptional performance.
Our grinding wheel spindle, a marvel of precision engineering, boasts a ball bearing motorized spindle with a dynamic balance level of G1. This spindle is grease-lubricated to ensure seamless operation, reaching an impressive maximum speed of 8000rpm. With a shaft end radial runout and end runout of W0.001, it guarantees unparalleled accuracy. The internal design includes a cooling cycle, efficiently cooling the spindle to maintain optimal conditions during intensive grinding tasks.

(5) Precision at its finest: High Precision Head Frame.
Experience the epitome of precision and power with our workpiece shaft, which integrates a high precision, high rigidity, high torque permanent magnet synchronous motorized spindle. It features a built-in Renishaw circular grating ruler and encoder, providing fast response and high positioning accuracy. This advanced system offers robust torque characteristics, maintaining high-speed stability even amidst load fluctuations. It not only enhances machining surface precision but also broadens the scope for precision grinding and low-speed robust grinding.
The workpiece fixture design undergoes meticulous balance simulation optimization to minimize fixture-induced processing errors. This highly universal fixture is compatible with standard crankshaft part characteristics, featuring a floating pressing mechanism to significantly reduce pressing-induced errors, thereby boosting the qualified rate and processing accuracy.

Company Profile

Certifications

Our Advantages

1. We provide customer with comprehensive grinding solutions regarding production efficiency and  plant layout.
2. Machines are commissioned ready in our factory, and pre-accepted by trial production.
3. Parts, accessories and technical support are aviable during the whole life time of cylindrical grinding machine.
4. Quick action and reply for the technical questions at any time in the whole life of the machine.
5. Overseas after service center available in Russia, Turkey and Malaysia.
6. Engineer overseas service available on the requirement of customer.