QC11Y Hydraulic Guillotine Shear

The structure of the machine

1. Rack Section:

1.1 The machine frame consists of left and right side plates (wall plates), an upper tool holder, a worktable, a clamping crossbeam, an oil tank, and other components.

1.2 The main frame design employs finite-element analysis software to evaluate the strength and structural integrity of the modular computer rack, thereby ensuring equipment safety.

2. Frame: The frame is constructed as an all-steel welded assembly, providing sufficient strength and rigidity. High-temperature annealing is employed to eliminate internal stresses, thereby ensuring the overall accuracy of the machine body. Two hydraulic cylinders are mounted at the upper ends of the fixed frame on either side, driving the reciprocating vertical motion of the upper tool holder. An auxiliary tool holder is provided on the worktable surface to facilitate fine adjustments of the lower tool holder, and a feed roller is installed on the worktable for effortless operation.

The upper tool holder is guided by rolling linear guides, which are preloaded via belleville springs mounted on the front support shaft to eliminate any backlash in the guides, thereby achieving backlash-free operation and ensuring and enhancing the machine tool’s accuracy.

Three-point rolling guideways, with preloaded front guideways ensuring that the tool holder remains in constant contact with the upper and lower rollers, guaranteeing backlash-free reciprocating motion. The rollers are imported components. The upper tool holder is tilted forward for shearing, resulting in high-quality cut surfaces. The lower support point is fixed, providing excellent precision retention. The blade gap can be quickly and conveniently adjusted via the lower support point, with appropriate clearance yielding satisfactory shearing quality.

3. The frame is machined and formed using a large CNC floor-type boring-milling machine and a five-axis machining center, ensuring the parallelism and perpendicularity of all mounting surfaces.

18-meter large CNC floor-type boring and milling machine

16-meter pentahedral machining center

4. Adjustable blade holder; the upper and lower blades are made of high-strength rectangular blades, with all four cutting edges fully usable.

5. A rotary worktable and a front material-support device ensure convenient feeding and prevent the workpiece from being scratched during operation.

6. Rear Stop

It is mounted beneath the upper tool holder’s cross slide and moves up and down with it, driven by the rear stop adjustment motor. The CNC system controls the front-to-back positioning of the rear stop plate, and the position value is displayed on the digital readout mounted at the upper-left corner of the machine tool’s front crossbeam.

7. Cutting Edge Clearance Adjustment Device

The support roller mounted at the upper rear portion of the knife holder is an eccentric shaft, which is driven by a motor–reducer assembly to rotate. This rotation causes the knife holder to oscillate forward and backward, thereby adjusting the gap between the upper and lower blades.

A dial is mounted on the reducer; the reading on the dial indicates the thickness of the sheet metal to be sheared, which can be directly read from the dial according to the plate thickness.

8. Light-line-and-shadow alignment device, facilitating line drawing and cutting.

9. Hydraulic-electric control for adjusting the shear angle. The shear angle can be adjusted within a specified range. When shearing thin sheets, this adjustment further enhances cutting quality; when shearing thick plates, it allows for processing thicker materials. The advantage of adjustable shear angle is particularly pronounced when cutting narrow strip stock: a smaller shear angle reduces distortion and warping of the strip.

10. Pressing Device:

It consists of a set of clamping cylinders mounted on the front crossbeam of the frame. When pressurized oil is supplied to the clamping cylinders, the clamping heads descend against the spring force to firmly clamp the sheet material; after shearing is completed, the clamping heads return to their original position under the action of the spring force. The magnitude of the clamping force varies with the thickness of the sheet being sheared.

11. Hydraulic System:

The system comprises a control valve group, oil pump, hydraulic cylinder, pressing cylinder, and a combined hydraulic circuit. The overall system design is rational, with low noise, smooth operation, and excellent safety performance. During the accumulator’s return stroke, the tool holder operates smoothly during shearing, and the transition back to the cutting position is free of hydraulic shock noise.

① The hydraulic manifold is equipped with a direct-acting safety relief valve to ensure precise pressure adjustment.

② The pressing mechanism employs an integrated hydraulic circuit and independently arranged parallel pressing cylinders, and is equipped with rubber pads. When the sheet material is uneven, the pads can freely extend and retract to firmly press against the surface, while the clamping force automatically adjusts according to the material and thickness of the sheet, thereby preventing damage to the surface.

③ Hydraulic electro-control for adjusting the shear angle. The shear angle can be adjusted within a specified range. When shearing thin sheets, this adjustment further enhances cutting quality; when shearing thick plates, it allows for processing thicker materials. The advantage of adjustable shear angle is even more pronounced when shearing narrow strip stock: a smaller shear angle reduces distortion and warping of the strip.

12. Electrical Section:

It consists of a control electrical cabinet, intermediate connecting cables, a control panel, main and auxiliary motors, a foot switch, and other components, offering a high safety factor and excellent overall performance.

① All power systems are housed within the airframe and are controlled and operated via buttons on the control panel.

② Equipped with a foot pedal switch, allowing direct control of the shearing operation for convenient and efficient operation.

③ Major electrical components are selected from internationally renowned brands.

④ Safety guardrails ensure operator safety and provide a clear view of the cutting process, offering both safety and convenience.

⑤ Use circuit breakers to provide short-circuit protection for the circuit.

⑥ Motor overload and short-circuit protection are provided by the air switch.

⑦ The control panel is equipped with an emergency stop button, allowing the machine to be promptly shut down in case of operational errors.

13. E21S CNC System

Product Features

Rear material control

Control of standard motors or variable frequency drives

Intelligent Positioning

Dual-channel programmable digital output

Workpiece Counting

40 programs, each with 25 steps

Single-sided positioning

Concession function

One-Click Parameter Backup and Restore

Imperial and metric systems

Chinese/English

Machine operating environment:

Power requirements: 380 V ±10%, 50 Hz

Installation site: clean and low-dust

Maximum temperature: 40ºC

Lowest temperature: -5ºC

Relative humidity: 20–80% RH

Altitude: Below 1,000 m

Hydraulic oil: No. 46 hydraulic oil

Standards for machine execution:

JB/GQF2011-86 “Quality Grading Standard for Shearing Machines”

JB/T 1826-91 “Types and Basic Parameters of Shearing Machines”

JB5197-91 Technical Specifications for Shearing Machines