Air-tightness testing machine

A leak‑testing device is a gas‑tightness testing system that fills the workpiece (hereinafter referred to as the “workpiece”) with a tracer gas and uses an onboard gas sensor to detect any gas leaking from the workpiece, thereby identifying defects such as cracks or pinholes in components and semi‑finished products. This principle is applied to assess the weld quality of wheel rims, with product compliance determined by measuring the amount of gas leakage.

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Product Information

Overview

A leak‑testing device is a gas‑tightness testing system that fills the workpiece (hereinafter referred to as the “workpiece”) with a tracer gas and uses an onboard gas sensor to detect any gas leaking from the workpiece, thereby identifying defects such as cracks or pinholes in components and semi‑finished products. This principle is applied to assess the weld quality of wheel rims; by measuring the amount of leaked gas, the product’s compliance is determined.

Technical Features

This model of airtightness testing machine features a dual‑station test platform, enabling simultaneous inspection of two rims of the same model or two rims of different models. It is equipped with a full range of rim‑specific test molds, which can be installed and swapped quickly and conveniently. The system uses carbon dioxide gas as the testing medium, offering enhanced safety and environmental friendliness; its CO₂ sensor delivers rapid response, allowing precise detection of even minute changes in concentration within an extremely short time frame.

It exhibits strong anti-interference performance, can operate continuously in relatively complex environments, and is unaffected by variations in external atmospheric composition. It also features a long service life, safety, and environmental friendliness.

Manual operation requires one worker, with a testing throughput of 5 pieces per minute.

Specifications and Parameters

Device model	QMJC-350
Grid voltage	AC 380V±10%, 3-phase, 50Hz
Maximum rim width	290mm
Maximum rim diameter	18 inches
Minimum rim diameter	13 inches
Seal material: silicone	Silica Gel
Compressed air	0.4~0.6 MPa
Cylinder clamping force	2×150 kN

Structural Overview

This machine consists of three main components: the main frame, the hydraulic transmission system, and the electrical control system. The main frame includes: 1) the machine body, 2) the lower die, 3) the upper die, 4) the worktable, and 5) the hydraulic cylinder.

The hydraulic transmission system comprises an oil tank, a pump–motor unit, and integrated valves, while the electrical system includes an electrical control cabinet and an electrical operator console, among other components.

The main unit and the hydraulic transmission are mounted on a concrete foundation, as shown in the attached drawing, while the electrical cabinet is secured to the side of the machine frame.

Rim Inspection Specifications

The detectable rim specifications are as follows:

Serial number	Rim specifications	Rim diameter	Rim width
1	13X4.5	13 inches	4.5 inches
2	13x5	13 inches	5 inches
3	14X5	14 inches	5 inches
4	14x5.5	14 inches	5.5 inches
5	14X6	14 inches	6 inches
6	15X6	15 inches	6 inches
7	15x7	15 inches	7 inches
8	16X6	16 inches	6 inches
9	16X6.5	16 inches	6.5 inches
10	17x7	17 inches	7 inches