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How To Purchase Automatic Feeding Shearing Machine?

An automatic feeding shearing machine is a crucial piece of equipment for upgrading traditional shearing machines to high-efficiency, less-manned, and automated sheet metal production. It’s not simply adding a feeding device to a regular shearing machine. It integrates loading, positioning, feeding, shearing, continuous processing, and, in some cases, retrieving into a single system.

Currently, the market offers automatic feeding shearing machines ranging from relatively simple CNC front-feeding machines to complete automated shearing units featuring “gantry loading + automatic feeding + shearing + automatic retrieving.”

When purchasing, don’t just look at the words “automatic feeding.” Focus on factors such as the feeding method, sheet metal specifications, feeding accuracy, repeatability, shearing accuracy, control system, degree of automation, and overall machine rigidity. Some front-feeding systems use servo drives, lead screw/rack or roller mechanisms, and achieve continuous automatic shearing through clamping and positioning.

For industries such as steel structures, sheet metal processing, ventilation ducts, automobile manufacturing, home appliances, construction machinery, electrical cabinets, doors and windows, and shipbuilding, selecting a suitable automatic feeding shearing machine is not simply a matter of comparing “price” and “degree of automation.” Instead, it requires a comprehensive consideration of sheet metal specifications, shearing capacity, feeding method, positioning accuracy, production cycle time, level of automation, control system, and subsequent maintenance costs.

The following is a systematic analysis of how to select a shearing machine with auto feed from a practical purchasing perspective.

1. How to Choose Automatic Feeding System?

First, you need to figure out: What kind of “automatic feeding” do you need? This is the first step in the selection process, and also the most easily overlooked point.

The so-called “automatic feeding shearing machines” on the market may actually correspond to several completely different structures.

CNC Backgauge Shearing Machine

This is the most basic form of automatic positioning.

The working process is usually:

Manual loading → Sheet metal moves to the backgauge → CNC positioning → Shearing → Manual handling

The backgauge is driven by a servo motor and can move automatically according to the program.

Strictly speaking, it belongs to:

Automatic positioning, not fully automatic feeding.

Suitable for:

Small batch production
Regular sheet metal dimensions
Sufficient operators
Sheet metal workshops with low automation requirements

If the company only wants to reduce manual measurement and adjustment of dimensions, this configuration can meet its needs.

2. What is a true automatic feeding shearing machine?

A true automatic feeding system typically adds the following to the front of the shearing machine:

Feeding platform
Servo feeding mechanism
Roller or conveyor mechanism
Pneumatic/hydraulic clamping mechanism
CNC control system
Positioning and detection mechanism

The basic process is:

Loading → Centering → Clamping → Automatic feeding → Automatic positioning → Shearing → Refeeding → Re-shearing

Therefore, it is particularly suitable for:

Batch fixed-length cutting
Continuous segmentation of long plates
Narrow strip processing
Continuous cutting of multiple sizes
Repetitive orders
High-volume sheet metal production

Some industrial automatic feeding equipment uses pneumatic clamps to hold the sheet metal, then advances it step by step according to the program, and automatically triggers the shearing action after reaching the correct position.

3. Selecting the Automatic Feeding Method Based on Production Mode

This is a crucial factor when purchasing.

Solution 1: Front-Feed Shearing Machine

This is currently a worthwhile option.

The sheet metal is placed on the feeding platform in front of the shearing machine, and a servo system controls its movement towards the shearing area.

Typical Structure:

Sheet metal → Front feeding platform → Clamping mechanism → Shearing area

Advantages:

High degree of automation
Reduces manual repetitive pushing of the sheet
Suitable for continuous shearing
More suitable for processing narrow strips and short parts
Suitable for batch production

Some front-feed shearing machines can achieve automatic positioning, clamping, feeding, and continuous shearing, and control multiple shearing steps through programming.

Especially suitable for:

Production modes where “a large sheet needs to be continuously cut into many smaller sheets of different lengths.”

For example:

Original sheet material:

2500 × 6000 mm

Program settings:

1000 mm × 2

800 mm × 3

500 mm × 2

300 mm × several

The equipment can automatically complete continuous feeding and shearing according to the program.

Solution 2: Automatic truss feeding + CNC shearing machine

This method is closer to an automated production line.

Basic process:

Intellignet sheet metal storage system → Automatic feeding → Centering → Shearing machine → Back gauge positioning → Shearing → Receiving

If combined with a truss robot, it can further achieve:

Automatic material handling → Automatic feeding → Automatic positioning → Automatic shearing → Automatic receiving

Currently, there are solutions that integrate truss feeding, front feeding, shearing, and automatic unloading, which can achieve continuous automation from sheet material feeding to shearing and receiving.

If your company is building:

Intelligent sheet metal factory
Automated production line
Unmanned workshop
Intelligent sheet metal warehousing
MES production management system

Then it is recommended to consider this solution directly, rather than simply purchasing a “shearing machine with feeding mechanism”.

4. Select Shearing Machine Specifications Based on Sheet Thickness

Even the most advanced automatic feeding system is meaningless if the shearing machine itself lacks sufficient capacity.

When selecting equipment, first determine:

1) Maximum Shearing Thickness

For example:

4 mm

6 mm

8 mm

10 mm

12 mm

16 mm

20 mm

25 mm

30 mm

It is also crucial to clarify:

What material does the maximum shearing thickness correspond to?

Because:

Q235 ≠ 304 Stainless Steel ≠ Aluminum Plate

Even with the same nominal thickness of 16 mm, the shearing capacity required to cut different materials may vary significantly.

2) Determine the Maximum Shearing Width

Common specifications include:

Cutting Length	Applications and Features
2500 mm	Small to medium-sized sheet metal work
3000/3200 mm	Conventional sheet metal processing
4000 mm	Medium to large-sized sheet metal
5000 mm	Large structural components
6000 mm	Long plates, steel structures, heavy equipment manufacturing
8000 mm and above	Specialized processing of large sheet metal

For example:

A 6×3200 mm automatic feeding shearing machine

This can generally be understood as:

Under specified material conditions, the maximum shearing thickness is approximately 6 mm, and the maximum shearing length is 3200 mm.

However, when purchasing, you should not only look at the model number, but also ensure that the manufacturer provides complete technical parameters.

5. One of the most important indicators of an automatic feeding system: Feeding accuracy

This is a crucial indicator for judging the quality of the equipment.

Many manufacturers emphasize: “High-precision servo feeding.”

However, buyers shouldn’t just listen to the advertising claims.

You should specifically ask:

What is the feeding positioning accuracy?

For example:

±0.5 mm

±0.2 mm

±0.1 mm

You should also ask:

Under what material type, length, and speed was this accuracy tested?

Because:

Theoretical positioning accuracy ≠ Actual machining accuracy.

Factors that truly affect feeding accuracy include:

Servo motor
Encoder
Ball screw
Linear guide
Rack and pinion
Clamping mechanism
Sheet flatness
Mechanical clearance
Platform rigidity
Control system
Sheet weight

Some automatic feeding platforms use linear guides and precision ball screws, offering high position control accuracy, but the actual accuracy still needs to be verified under specific working conditions

6. Don't Ignore "Repeatability"

For mass production:

Repeatability is often more important than single-shot accuracy.

For example, the requirement is:

1000 mm

100 consecutive cuts.

If each cut is:

999.5

1000.2

999.8

1000.4

999.6…

The average size may seem fine, but product consistency will be poor.

7. Focus on Inspecting the Feeding Mechanism

The core of a shearing machine with auto feed is not just the CNC system.

More importantly:

The mechanical feeding mechanism.

Common structures include:

1) Roller Feeding

Uses rollers to clamp and move the sheet metal.

Advantages:

High speed
Relatively simple structure
Suitable for continuous production

Key considerations:

Roller material
Roller diameter
Clamping force
Anti-slip capability
Surface scratchability (for stainless steel)

2) Servo Screw Feeding

Uses a servo motor + screw + clamp.

Advantages:

High positioning accuracy
Easy control
Suitable for multi-size processing

Especially suitable for:

High-precision dimensional cutting.

3) Rack/Pulley Feeding

Suitable for:

Long stroke
Large sheet metal
Heavy-duty automation systems

Its characteristic is that it can handle both long strokes and high load capacity.

8. Clamping Mechanism

Automatic feeding systems cannot simply “push the sheet metal”.

It must be considered:

How to ensure that the sheet metal does not slip or shift during feeding?

Therefore, the following must be checked:

Pneumatic clamps
Hydraulic clamps
Number of clamps
Clamping position
Clamping force
Anti-slip structure
Centering mechanism

If the clamping force is insufficient:

Correct feeding length ≠ Correct cutting size.

Because the sheet metal may slip during feeding.

9. Check for automatic centering function

This is very important for large sheet metal.

An excellent automatic feeding system usually needs to solve:

Sheet metal skew problem.

For example, after the sheet material actually enters the equipment:

Left side: 1000 mm
Right side: 1005 mm

Although the feeding mechanism has advanced 1000 mm, the cut sheet material already has an angular error.

Therefore, highly automated equipment can incorporate:

Left and right centering
Side positioning
Front positioning
Automatic correction
Clamping positioning

Forming:

Feeding → Centering → Correction → Clamping → Shearing

Instead of simply “pushing forward”.

10. Inspect the Shearing Machine Frame Structure

Don’t neglect the shearing machine itself just because you’re focusing on the automatic feeding system.

Automatic feeding is only an auxiliary system.

The foundation that truly determines the shearing quality is still:

Frame + Blade Holder + Hydraulic System + Blades + Shearing Gap + Control System.

1) Frame Rigidity

Key areas to check:

Steel plate thickness
Welding quality
Post-weld stress relief
Overall frame rigidity
Machine body machining accuracy

If the frame rigidity is insufficient:

The thicker the plate, the more obvious the problem.

2) Blade Holder Stability

The blade holder movement must be smooth.

If the blade holder moves asynchronously on both sides, the following may occur:

One side cuts first
One side cuts later
Plate deformation
Non-perpendicular cuts
Inconsistent dimensions

11. Can the shearing gap be automatically adjusted?

This is a very important function of a high-configuration shearing machine.

Different materials and thicknesses require different blade gaps.

For example:

Thin plates: require smaller gaps.
Thick plates: require larger gaps.

If CNC automatic adjustment is possible:

Plate thickness input → System calculation → Automatic adjustment of shearing gap

Manual adjustments can be significantly reduced.

Some CNC shearing machine systems can control parameters such as blade gap, shearing angle, and stroke.

12. Shearing Angle Also Deserves Attention

Hydraulic guillotine shearing machines especially require careful attention to shearing angle control.

A reasonable shearing angle strikes a balance between:

shearing force, sheet deformation, and production efficiency.

If the shearing angle is too large:

it may lead to increased sheet deformation.

If it is too small:

it may increase the instantaneous shearing load.

Therefore, it is recommended to choose a CNC system that can be rationally set according to the material and thickness.

13. How to Choose a CNC Control System?

The “brain” of an automatic feeding shearing machine is the control system.

It is recommended to consider three levels when purchasing.

Basic Type

Suitable for:

Small batches, single size, low automation requirements

Key points:

Simple, stable, and easy to operate.

Mid-range

Suitable for:

Mass production
Multi-specification products
Requires program storage
Automatic feeding

Requires:

Multiple program storage
Multi-step programs
Automatic feeding
Automatic positioning
Automatic return trip
Parameter recall

High-end

Suitable for:

Automated production lines
Smart factories
MES/ERP integration
Robot loading and unloading

Further considerations:

PLC
CNC
Industrial Ethernet
MES interface
Production data acquisition
Fault alarm
Remote diagnostics
Production statistics

Some automated shearing systems can already be integrated with MES, production statistics, and automatic scheduling functions.

14. Automatic Feeding Speed

Consider automatic feeding speed, but don’t blindly pursue the fastest possible speed.

Manufacturers may emphasize:

High-speed feeding.

But what you should really focus on is:

Feeding speed + Positioning accuracy + Sheet material stability

Whether these three are balanced.

For example:

The feeding speed is very fast, but the inertia when stopping is large.

Ultimately, this may lead to:

Increased speed → Increased positioning error.

Therefore, a more reasonable evaluation method is:

How many qualified workpieces are completed per unit time.

Instead of:

What is the fastest speed of the feed motor in meters per minute?

15. Pay attention to the "sagging problem" of thin and large plates

This is an issue easily overlooked by automatic feeding shearing machines.

Especially:

Thin plates + wide plates + long plates

Sagging is very likely to occur.

For example:

1.5 mm × 3000 mm sheet

If the support is insufficient, the sheet may experience:

Sagging
Warping
Offset
Friction
Scratching

Some shearing machines use pneumatic sheet support systems to reduce sagging of wide and thin plates and improve shearing stability.

Therefore, when purchasing, you should ask:

Is there a front support?
Is there pneumatic support?
Is there a ball bearing worktable?
How is sagging prevented for long plates?

16. Stainless steel sheet users should pay special attention to scratch prevention

If your company mainly processes:

304
316
Galvanized sheet
Color-coated sheet
Aluminum sheet

Then surface protection of the automatic feeding system is crucial.

Recommended selection:

Ball bearing worktable
Scratch-resistant rollers
Nylon rollers
Rubber-coated rollers
A reasonable clamping structure

Some front feeding structures use conveyor balls/ball bearing worktables to reduce sheet feeding resistance and minimize surface scratches.

17. Automation Level

Focus on the “automation level,” don’t be misled by the term “automatic feeding.”

The equipment can be divided into 4 levels:

Level	Automation Degree	Main Features
Level 1	★★	CNC back gauge
Level 2	★★★	Automatic front feed
Level 3	★★★★	Automatic loading + feeding + shearing
Level 4	★★★★★	Loading + positioning + feeding + shearing + receiving + warehousing/MES

If the manufacturer says:

“Our equipment is a fully automatic shearing machine.”

You must continue to ask:

What exactly is automated?

18. When should truss loading system considered?

If the sheet metal is very heavy, truss loading is recommended.

For example:

6×3200 mm

The steel plate may already be very heavy.

If manual handling is still relied upon:

High labor intensity
High safety risks
High labor costs
Low loading efficiency

In this case, consider:

Truss robot + vacuum/electromagnetic chuck + automatic feeding shearing machine.

Complete process:

Sheet metal storage
Automatic identification
Truss material handling
Automatic loading
Automatic centering
Automatic feeding
Automatic shearing
Automatic collection

This type of solution already represents a truly automated shearing unit. Currently, there are engineering solutions that integrate truss loading, front feeding, and shearing.

19. How should different companies choose?

- Small Sheet Metal Plants

Recommendation:

Ordinary hydraulic shearing machine + CNC back gauge

Completely automatic feeding is not always necessary.

- Medium Sheet Metal Plants

Recommendation:

Hydraulic guillotine shearing machine + automatic front feed

More suitable for batch production to specific lengths.

- Large-Scale Production Enterprises

Recommendation:

Automatic feeding + CNC front feed + automatic shearing + automatic receiving

Reduces manual intervention.

- Smart Manufacturing Enterprises

Recommendation:

Smart warehousing + gantry robot + automatic feeding shearing machine + automatic receiving + MES

Achieves:

Order → Production scheduling → Automatic material handling → Automatic shearing → Automatic warehousing

Forms a complete digital production chain.

20. Summary

If your core goals are:

Improve shearing efficiency, reduce manual labor, and improve dimensional consistency.

Prioritize:

CNC hydraulic guillotine shearing machine + automatic front feed

If the goal is:

Mass automated production.

Recommended:

Automatic feeding + servo front feed + CNC shearing + automatic rewind

If the goal is:

Intelligent sheet metal factory.

Then recommended:

Intelligent warehousing + gantry robot + automatic centering + servo front feed + CNC shearing machine + automatic rewind + MES

This is the only way to truly upgrade “automatic feeding” from a single function to a complete automated shearing production unit.

Especially remember:

Don’t simply pursue “the most automated functions,” but rather choose an automation solution that matches your sheet metal specifications, order volume, and production cycle.

For most companies undergoing sheet metal automation upgrades, “servo front feed + CNC guillotine shearing machine” is usually a very practical starting point. For mass production, it can be further upgraded to a complete production unit of “gantry automatic feeding + front feed + shearing + automatic rewind.”