CNC Four Head Corner Crimping Machine

Core Features

• Four-head simultaneous crimping: The CNC Four Head Corner Crimping Machine completes all four corners of a frame in one pressing cycle. This reduces handling time compared with single-head or double-head alternatives, where the frame must be repositioned and re-clamped for each pair of corners.
• CNC servo positioning: Each crimping head is positioned by a servo motor driving a ball screw. The operator selects the frame size on the touchscreen, and the heads move automatically to the required positions. The same system stores multiple frame recipes. Repeat positioning accuracy is specified at ±0.1 mm, with diagonal error typically within 1 mm and seam error below 0.15 mm under properly prepared profiles.
• Frame size range: The machine handles frames from 550 × 550 mm up to 1800 mm in height and 3000 mm in width, covering the majority of aluminum window and door frame dimensions found in residential and commercial production.
• Hydraulic crimping system: Each head is driven by a hydraulic cylinder with a rated oil pressure of 15 MPa and a total crimping force of 48 kN. The hydraulic circuit uses a two-stage high-low pressure sequence: the rapid approach stroke reduces cycle time, while the high-pressure hold at the end of the stroke ensures a tight corner connection.
• Pneumatic moving clamps: Clamping units move forward automatically for frame loading and retract after crimping for unloading. Clamping force is applied from two directions to hold the profile in position and reduce the risk of deformation during the pressing stroke.

Technical Specifications

How It Works

The CNC Four Head Corner Crimping Machine operates in a sequence that begins with frame dimension entry on the touchscreen. The four crimping heads, each mounted on servo-driven ball screw axes, move automatically to the programmed positions. The operator places the cut and prepared aluminum profiles into the clamping fixtures. Pneumatic clamps engage to hold the profiles in place, applying pressure from both vertical and horizontal directions. Once clamped, the hydraulic circuit activates in two stages: a low-pressure rapid advance moves the crimping tools into contact with the profile corners, and a high-pressure hold applies the full 48 kN crimping force to complete the corner joint. After the hold time, the clamps release, the crimping tools retract, and the finished frame can be removed. All four corners are completed in one cycle, so the frame does not need to be repositioned.

Key Components

• Servo motors and ball screws: Each of the four heads is positioned independently by an AC servo motor coupled to a precision ball screw. This arrangement provides the ±0.1 mm repeatability and allows the heads to be repositioned for different frame sizes without manual adjustment.
• Hydraulic power unit: A 60-liter tank supplies oil to four hydraulic cylinders through a manifold with pressure control valves. The high-low pressure two-stage sequence is managed by the PLC through solenoid valves.
• Touchscreen and PLC: The industrial touchscreen displays frame size settings, stored programs, production counters, and alarm messages. Parameter recipes for commonly produced frame dimensions can be saved and recalled.
• Crimping tools: Hardened steel crimping knives are machined to match the profile geometry. Tooling sets can be exchanged for different profile cross-sections. The knives are adjustable for depth and alignment.
• Pneumatic clamping system: Clamps move forward and retract on linear guides. Clamping force is supplied by pneumatic cylinders with pressure regulated at 0.5–0.8 MPa. The dual-direction clamping design applies force from two sides to stabilize the profile during crimping.
• Machine frame: A welded steel structure supports the four moving heads and the fixed central worktable. The frame is designed to resist the reaction forces generated during crimping and maintain head alignment over time.

Application Scenarios

Aluminum Window Manufacturing

Crimping of casement, sliding, and thermal break insulated window frames.

Aluminum Door Production

Corner assembly of entrance doors, balcony doors, fireproof aluminum doors, and interior aluminum door frames.

Curtain Wall and Building Profiles

90° corner crimping of aluminum mullions, transoms, and facade profiles.

High-Volume Production

Used in medium and large aluminum door and window factories where completing four corners in one cycle reduces per-frame processing time and supports higher daily output.

Manufacturer & Warranty

Shandong Lebulang Precision Machinery Co., Ltd., operating as Lebulang Machine, has been producing aluminum and PVC window and door processing equipment at its Jinan facility since 1996. The company manages R&D, machining, assembly, testing, and sales in-house. The CNC Four Head Corner Crimping Machine is built under this integrated system and supplied factory-direct with CE and ISO 9001 certification. A one-year warranty covers the main structure. Remote technical support, including video diagnosis and operation guidance, is included. Spare parts such as crimping knives, seals, and filter elements are stocked and can be ordered separately. On-site installation and commissioning can be arranged at additional cost.

FAQ

Q1: What does CLM4S stand for?

A: CNC Corner Machine 4-head Servo. The "4" refers to the four independent crimping heads.

Q2: What is the maximum frame size the machine can handle?

A: The standard configuration handles frames up to 1800 mm high by 3000 mm wide. Non-standard sizes can be discussed at the time of order.

Q3: Is the machine difficult to operate for new workers?

A: Operation is through a touchscreen with stored frame programs. An English-language manual and video training are provided. Most operators learn the daily routine within one to two working days.

Q4: What types of payment and delivery terms are available?

A: Payment can be made by T/T or L/C in major currencies including USD, EUR, and GBP. Standard delivery terms are FOB Qingdao or Jinan. CFR, CIF, and EXW are also accepted depending on the shipment destination.

Q5: Can the crimping tooling be customized for specific profiles?

A: Yes, crimping knives can be machined to match the customer's profile cross-section. A profile sample or drawing is required during the order process to produce the correct tooling set.