Scroll compressor

The scroll compressor is the latest-generation air compressor developed in recent years. Compared with conventional air compressors, it boasts a host of outstanding technical advantages: simple structure, compact size, light weight, low noise, long service life, smooth and continuous air delivery, easy operation, and low maintenance costs. As such, it is widely hailed in the industry as the “maintenance-free air compressor” and the “new revolutionary air compressor,” making it the ideal model for air compressors rated at 50 HP or less.

Principle: The mechanism consists of a pair of dynamically and statically rotating scroll discs that mesh with each other in a double-function, equation-based configuration. During the intake, compression, and exhaust processes, the stationary disc is fixed to the housing, while the moving disc is driven by an eccentric shaft and constrained by an anti-rotation device, enabling it to perform small-radius planar rotation about the center of the stationary disc’s base circle. Gas is drawn in through an air filter at the periphery of the stationary disc; as the eccentric shaft rotates, the gas is progressively compressed within a series of crescent-shaped compression chambers formed by the meshing of the two scrolls, and is then continuously discharged through the axial port in the central assembly of the stationary disc.

Motor Housing Fixture OP10

1: Milling the flat surface and drilling holes, machining locations

2: Four red-faced supports, with air-tightness testing included.

3: Four clamping points on the four sides, with a serrated head on the belt to prevent uneven product deformation during the clamping process.

Mold for the inner bore of the motor housing OP20

1: Boring, machined area

2: Four red-faced supports, with air-tightness testing included.

3: Yellow—two pin locations for positioning, consisting of one round pin and one splined pin.

4: Four clamping points, using rotary cylinders for rotational clamping.

5. Due to the differing positions of the four product clamping points, three of them are identical, while the fourth is offset; when processing different products, the corresponding clamping blocks must be swapped. The clamping mechanism features a serrated head to prevent uneven deformation of the product during the clamping process.

Front Shell Tooling OP20

1. Machining features: outer cylindrical surface, end face, locating pin holes, motor mounting holes, and bearing holes.

2. Positioning: clamping the outer circle, with angular positioning on the side.

3: Three airtight supports, inspection points.

Moving Plate OP30: Bearing Hole Surface Machining

Clamp the outer diameter and machine anti-rotation holes, bearing holes, and locating pin holes.

Clamp half of the outer circle using a four-jaw chuck with downward clamping, using the end face of the profile line as the datum surface and the tail end of the profile line for positioning.

3D illustration of the fixture

Physical image of the fixture

OP40-type line machining for the moving plate

Processing method: vacuum first, then clamping, with simultaneous air-tightness testing.

1. Support surface, with four airtightness inspection ports.

2. Positioning: Use a D15.03 round pin for positional alignment and a D15.03 diamond pin for angular alignment.

3. Clamping: Floating clamping using the D78 outer diameter.

4. Error-proofing: Use D5 as the error-proofing hole.

3D illustration of the fixture

Physical image of the fixture

Machine Tool Machining Demonstration

Static Setup OP30 – Bearing Bore Surface Machining

Clamp the outer diameter and machine anti-rotation holes, bearing holes, and locating pin holes.

Clamp half of the outer circle using a four-jaw chuck with downward clamping, using the end face of the profile line as the datum surface and the tail end of the profile line for positioning.

Physical image of the fixture

Static Plate OP40

Processing method: hydraulic clamping, with simultaneous air-tightness testing.

1. The three bottom points form a supporting surface, and there are also three airtightness test ports; product dimensions

2. Positioning: Use a D3.5 round pin for positioning, and another D3.5 diamond-shaped pin for angular positioning.

3: First, apply three-point clamping; then, after the three-jaw chuck is tightened, open the three-point clamping points.

As no 3D drawings of the product are available, the 3D drawing of the fixture has not yet been produced; the following images are for reference only.

Front-side tooling for the back cover OP10

1: Machined Area

2: Three yellow-surface supports, with air-tightness testing included.

3: Three clamping points, with the clamping location at the stiffener.

Back cover reverse-side tooling OP20

1: Machined Area

2: Three red-face supports, with air-tightness testing included.

3: Blue—two pin locations for positioning, consisting of one round pin and one splined pin.

4: Two bridge-type floating clamping mechanisms, using rotary hydraulic cylinders.

The foregoing constitutes our company’s complete process plan for the machining of scroll compressors. We warmly welcome industry professionals to visit and engage in discussions and exchanges. Thank you!