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Process Capability
Round Point Clinching
Equipped with simple round punches, our SIMITCH pneumo-hydraulic riveting machine presses the sheet materials into matched dies. The metal flows and deforms within the dies to form joint points with no flash or burrs.
SKB Flat Point Clinching
Raised round points from standard SIMITCH clinching may cause interference for certain sheets. After forming SKB round points, use flat point dies to press down the protrusions and create flat joints with a tolerance of ±0.1 mm.
Dual Point Clinching
This innovative all-in-one solution adopts a single set of punch and die. Two joint points can be completed in one stamping stroke, greatly boosting production efficiency and preventing joint rotation. Compared with single round points, its shear strength can reach twice and tensile strength up to 1.5 times.
Rivet-style Round Point Clinching
This process uses simple cylindrical rivets via deep drawing and pressing. Similar to conventional round point clinching, materials are not cut but shaped under die cavities. It delivers high-strength joints even for ultra-thin sheets.
Micro Point Clinching
Micro round joints with a tip diameter of 1.5 to 2 mm are ideal for miniaturized components. Suitable for thin metal sheets (0.1-0.5 mm) and narrow flange connections, it provides excellent interlayer electrical conductivity.
ST Rectangular Point Clinching
Combining cutting and deformation processes, rectangular point clinching is mainly applied to hard materials and stainless steel sheets.
SKB Round Point Clinching
This clinching process adopts dedicated SKB dies, consisting of a fixed section and a movable section with 4 to 6 movable petals. The fixed section ensures precise centering for joint forming, while the movable petals guide and restrain metal flow at the joint area.
Three-petal Die Clinching
Features broader adaptability and better compatibility with various sheet materials.
Clinching Process
1. Positioning & Press-fitting
First, return the punch to top dead center. Place the lower sheet flat, stack the upper sheet on top, and align the clinching area with the die center.
2. Forming Stage
The initial forming phase includes elastic pressing and tensile forming. The elastic pressing phase starts when the punch contacts the upper sheet and ends when both sheets begin plastic bending.
3. Plastic Deformation
During the filling phase of rivetless clinching, the punch keeps moving downward to squeeze the upper and lower sheets until it approaches bottom dead center.
4. Pressure Holding
Maintain pressure on the dies for a certain period to prevent sheet rebound. This enables full filling of the annular grooves and completes the forming of rivetless clinched joints.
5. Pressure Release & Demolding
The punch moves upward. Its reverse taper structure facilitates demolding. Remove the finished sheets afterward. For automated multi-point clinching, separate the dies from sheets first, then shift materials or dies for subsequent operations.
Why Choose Rivetless Clinching?
Compared with traditional joining methods, rivetless clinching boasts outstanding advantages: low energy consumption, low cost, easy maintenance and eco-friendliness. It also features long service life, advanced technology, high joint strength, flexible application and reliable process control.

Low Energy Consumption & Cost

No consumable materials are required. Its cost is only about 50% of spot welding, making it an optimal choice for cost reduction and efficiency improvement.

Durability & Easy Maintenance

Rivetless clinching equipment features simple structure, low price, long service life and easy maintenance, unlike traditional equipment which ages rapidly and incurs high maintenance costs.

Aesthetic Appearance & Environmental Protection

Joints are neat with no extra surface treatment needed. The process generates no noise or dust pollution, fully complying with environmental standards.

Long Die Life & Simple Operation

Service life of clinching dies ranges from 100,000 to 300,000 cycles. The whole process requires no pre-processing or post-processing such as punching and surface treatment, which greatly improves working efficiency.

Wide Material Compatibility

It successfully joins aluminum, magnesium, titanium and other metals that are hard to connect via conventional techniques, and performs excellently for dissimilar materials and sandwich panels.

High Automation & Reliable Joint Quality

Highly automated for single or simultaneous multi-point joining, ideal for mass production. Joints have no stress concentration and better fatigue resistance than spot welding. Joint strength can be inspected non-destructively with full-process automatic monitoring.

High Joint Strength & Load Capacity

Though its strength is slightly lower than self-pierce riveting, it fully meets the requirements of most application scenarios, and is more suitable for thin sheet connection.

Excellent Connection Flexibility

Capable of joining sheets with different thicknesses, materials and shapes, it adapts to various complex design requirements.

Precise Process Control

The position and shape of joint points can be precisely controlled to ensure consistent and reliable product quality.

Diverse Applications
Home Appliance Industry
Washing machines, tumble dryers, refrigerators, ovens & stoves, air conditioners, dishwashers
Construction Engineering
Garage doors, elevators, lighting fixtures, interior & exterior doors, bus ducts
Ventilation Duct Industry
Ventilation ducts, air filters, boilers, radiators, bag filters
Automotive Industry
Roof frames, airbags, battery boxes, car body components, car roof interiors, switch contacts
We currently serve over 3,000 clients across automotive, home appliance, refrigeration, elevator, sheet metal, electrical, hardware and furniture industries.

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