A line die is a set of separate stamping dies arranged in process sequence to manufacture a sheet metal part through operations such as drawing, trimming, piercing, flanging and restriking. In automotive stamping, line dies are also commonly associated with tandem die or tandem tooling systems where the part is transferred from one die to the next.
Dongguan Changdong Tool & Die Co., Ltd. designs and manufactures custom automotive line dies and tandem tooling for suitable structural parts, formed panels and reinforcement components. Tooling configuration is developed according to part geometry, material grade, forming depth, production requirements, handling method and customer press-line conditions.
Process planning, forming-risk review, springback evaluation and station allocation according to project requirements.
Drawing, trimming, piercing, flanging and restriking can be divided into separate tooling operations.
Selected line-die stations can be tried out on suitable in-house press equipment, subject to die size and press conditions.
Form, profile, holes, datums and selected dimensions can be checked using suitable inspection methods.
A line die system divides the complete stamping process among several independent dies. A typical automotive sequence may use one die for drawing, another for trimming and piercing, followed by flanging and restriking dies. The part is moved between dies manually, robotically or by the customer's automated handling system. This differs from progressive tooling, where the material remains connected to a strip, and from a transfer die system, where part transfer is integrated around coordinated tooling stations.
The actual number of dies depends on part geometry, material formability, trim-line complexity, flange direction, springback and customer production layout. Some projects may combine trimming and piercing or flanging and restriking, while more complex parts may require additional forming or calibration operations.
| Line Die Operation | Main Function | Engineering Focus |
|---|---|---|
| Drawing die | Forms the blank into the primary three-dimensional geometry | Material flow, draw depth, blank-holder control, thinning, wrinkling and cracking |
| Trim / pierce die | Removes excess material and produces holes, slots or notches | Trim line, cutting clearance, burr direction, part location and scrap discharge |
| Flanging die | Forms selected edges, walls and assembly-related flange features | Flange direction, radius, split risk, deformation and part locating |
| Restrike / calibration die | Corrects selected geometry and improves final dimensional stability | Springback, over-bending, contact condition and final profile |
| Capability | Reference | Conditions |
|---|---|---|
| Sheet thickness | Approximately 0.3–12 mm | Subject to material grade, part geometry, forming severity and process review |
| Maximum die length | Approximately 4,200 mm | Depending on individual die type, weight and equipment conditions |
| Maximum product size | Approximately 1,200 mm | Depending on part structure and tooling route |
| Press tryout | 45T–800T | For suitable individual dies or projects; destination-line validation may still be required |
| Working components | Selected components may be heat-treated to approximately HRC 58–60 | Depending on tool steel, part material and stamping conditions |
Each die is physically independent, but the part geometry created in one operation becomes the locating condition for the next. Datum strategy, locating pins, support surfaces and part orientation must therefore remain coordinated across the complete tooling line. Accumulated locating error can affect trim lines, holes, flange positions and final assembly features.
Automotive sheet metal can change shape after each forming operation. When required, Changdong supports CAE analysis, springback compensation, over-bending, restriking and tryout correction. Each downstream die should be developed from the actual or approved incoming part condition rather than only the final nominal CAD surface.
Line dies may operate with manual handling, robots or other customer-specified transfer equipment. Tool design should consider gripping areas, loading direction, open-die clearance, part release, sensor requirements and interference around the tooling. Changdong designs tooling interfaces according to provided line information but does not supply complete robotic stamping lines or press equipment.
Different line-die operations may require different tonnage, bed area, shut height and stroke. A drawing die may be governed by forming load and cushion requirements, while trim and pierce tooling is influenced by cutting perimeter and pressure-center distribution. Final tool design must therefore be matched to the actual destination press specifications.
In automotive sourcing, the terms line die and tandem die may overlap because both describe production through separate dies arranged in sequence. Their defining feature is that each operation is performed in an individual die.
A transfer die uses a coordinated transfer mechanism to move parts between stations within a more integrated tooling system, while progressive tooling keeps the part connected to the strip. Tooling selection should therefore be based on part size, geometry, forming depth, production volume and the customer's production equipment rather than terminology alone.
Suitable reinforcement, chassis-related and support components requiring several separate forming and trimming operations.
Sheet metal components that require drawing followed by trim, pierce, flange and calibration operations.
Selected projects where separate tooling operations provide practical process flexibility compared with an integrated progressive route.
A line die is an automotive stamping tooling system in which separate dies perform sequential operations such as drawing, trimming, piercing, flanging and restriking. Line dies are often associated with tandem stamping because parts move between independent tools.
Dongguan Changdong Tool & Die Co., Ltd. designs and manufactures custom automotive line dies and tandem tooling with DFM, CAE, machining, assembly, suitable 45T–800T press tryout and sample-validation support.
Changdong manufactures stamping dies and stamped metal parts. It does not manufacture stamping press lines, sell press machines or provide complete robotic automation systems.
The terms often overlap in automotive stamping because both can describe separate dies arranged in process sequence. Terminology varies by customer and market, so the tooling structure and handling method should be confirmed from the project specification.
A line die uses separate individual dies and an external method to move the part between them. A transfer die uses coordinated tooling stations together with a transfer mechanism. The suitable route depends on geometry, production volume and equipment.
Yes, when the tooling and customer line are designed for robotic handling. Changdong can consider gripping clearance and transfer conditions based on customer-provided automation information, but does not supply the complete robotic stamping line.
Changdong has 45T–800T press capacity for suitable tooling tryout. Whether every die in a line can be fully validated in-house depends on die size, tonnage, cushion, bed area, stroke and other press requirements. Final line validation may be required at the customer's facility.
Provide the 2D and 3D part data, material grade, thickness, expected volume, process requirements, destination press specifications, transfer or robot information, inspection standard and sample requirements.
Send your part data, material specification, process requirements and press-line information for a project-specific line die and tandem tooling review.
Email Drawings for Line Die ReviewChangdong is good at making metal stamping dies up to 4.2 meters, also we produce small size metal stamping toolings. The company manages the complete stamping die program from the CAE Simulation, layout designs and stamping tooling designs, and finish the machining to tryout and home line tryout to your hands. Meanwhile, the company produces the prototyping parts and stamping parts range from 45-880T. The successful cases include: stamping tools of Leoni connectors, automotive stamping dies of PSA P8 & B618, metal stamping toolings of Cummins exhaust pipe assembly, automobile stamping dies of NISSAN H60B projects, and stamping tools of car audio system, Canon printers, refrigerators, ovens and washing machines and so on.If you need metal stamping dies ,stamping parts or metal prototypings,
Email to us: sales@chang-dong.com
A line die is a set of separate stamping dies arranged in process sequence to manufacture a sheet metal part through operations such as drawing, trimming, piercing, flanging and restriking. In automotive stamping, line dies are also commonly associated with tandem die or tandem tooling systems where the part is transferred from one die to the next.
Dongguan Changdong Tool & Die Co., Ltd. designs and manufactures custom automotive line dies and tandem tooling for suitable structural parts, formed panels and reinforcement components. Tooling configuration is developed according to part geometry, material grade, forming depth, production requirements, handling method and customer press-line conditions.
Process planning, forming-risk review, springback evaluation and station allocation according to project requirements.
Drawing, trimming, piercing, flanging and restriking can be divided into separate tooling operations.
Selected line-die stations can be tried out on suitable in-house press equipment, subject to die size and press conditions.
Form, profile, holes, datums and selected dimensions can be checked using suitable inspection methods.
A line die system divides the complete stamping process among several independent dies. A typical automotive sequence may use one die for drawing, another for trimming and piercing, followed by flanging and restriking dies. The part is moved between dies manually, robotically or by the customer's automated handling system. This differs from progressive tooling, where the material remains connected to a strip, and from a transfer die system, where part transfer is integrated around coordinated tooling stations.
The actual number of dies depends on part geometry, material formability, trim-line complexity, flange direction, springback and customer production layout. Some projects may combine trimming and piercing or flanging and restriking, while more complex parts may require additional forming or calibration operations.
| Line Die Operation | Main Function | Engineering Focus |
|---|---|---|
| Drawing die | Forms the blank into the primary three-dimensional geometry | Material flow, draw depth, blank-holder control, thinning, wrinkling and cracking |
| Trim / pierce die | Removes excess material and produces holes, slots or notches | Trim line, cutting clearance, burr direction, part location and scrap discharge |
| Flanging die | Forms selected edges, walls and assembly-related flange features | Flange direction, radius, split risk, deformation and part locating |
| Restrike / calibration die | Corrects selected geometry and improves final dimensional stability | Springback, over-bending, contact condition and final profile |
| Capability | Reference | Conditions |
|---|---|---|
| Sheet thickness | Approximately 0.3–12 mm | Subject to material grade, part geometry, forming severity and process review |
| Maximum die length | Approximately 4,200 mm | Depending on individual die type, weight and equipment conditions |
| Maximum product size | Approximately 1,200 mm | Depending on part structure and tooling route |
| Press tryout | 45T–800T | For suitable individual dies or projects; destination-line validation may still be required |
| Working components | Selected components may be heat-treated to approximately HRC 58–60 | Depending on tool steel, part material and stamping conditions |
Each die is physically independent, but the part geometry created in one operation becomes the locating condition for the next. Datum strategy, locating pins, support surfaces and part orientation must therefore remain coordinated across the complete tooling line. Accumulated locating error can affect trim lines, holes, flange positions and final assembly features.
Automotive sheet metal can change shape after each forming operation. When required, Changdong supports CAE analysis, springback compensation, over-bending, restriking and tryout correction. Each downstream die should be developed from the actual or approved incoming part condition rather than only the final nominal CAD surface.
Line dies may operate with manual handling, robots or other customer-specified transfer equipment. Tool design should consider gripping areas, loading direction, open-die clearance, part release, sensor requirements and interference around the tooling. Changdong designs tooling interfaces according to provided line information but does not supply complete robotic stamping lines or press equipment.
Different line-die operations may require different tonnage, bed area, shut height and stroke. A drawing die may be governed by forming load and cushion requirements, while trim and pierce tooling is influenced by cutting perimeter and pressure-center distribution. Final tool design must therefore be matched to the actual destination press specifications.
In automotive sourcing, the terms line die and tandem die may overlap because both describe production through separate dies arranged in sequence. Their defining feature is that each operation is performed in an individual die.
A transfer die uses a coordinated transfer mechanism to move parts between stations within a more integrated tooling system, while progressive tooling keeps the part connected to the strip. Tooling selection should therefore be based on part size, geometry, forming depth, production volume and the customer's production equipment rather than terminology alone.
Suitable reinforcement, chassis-related and support components requiring several separate forming and trimming operations.
Sheet metal components that require drawing followed by trim, pierce, flange and calibration operations.
Selected projects where separate tooling operations provide practical process flexibility compared with an integrated progressive route.
A line die is an automotive stamping tooling system in which separate dies perform sequential operations such as drawing, trimming, piercing, flanging and restriking. Line dies are often associated with tandem stamping because parts move between independent tools.
Dongguan Changdong Tool & Die Co., Ltd. designs and manufactures custom automotive line dies and tandem tooling with DFM, CAE, machining, assembly, suitable 45T–800T press tryout and sample-validation support.
Changdong manufactures stamping dies and stamped metal parts. It does not manufacture stamping press lines, sell press machines or provide complete robotic automation systems.
The terms often overlap in automotive stamping because both can describe separate dies arranged in process sequence. Terminology varies by customer and market, so the tooling structure and handling method should be confirmed from the project specification.
A line die uses separate individual dies and an external method to move the part between them. A transfer die uses coordinated tooling stations together with a transfer mechanism. The suitable route depends on geometry, production volume and equipment.
Yes, when the tooling and customer line are designed for robotic handling. Changdong can consider gripping clearance and transfer conditions based on customer-provided automation information, but does not supply the complete robotic stamping line.
Changdong has 45T–800T press capacity for suitable tooling tryout. Whether every die in a line can be fully validated in-house depends on die size, tonnage, cushion, bed area, stroke and other press requirements. Final line validation may be required at the customer's facility.
Provide the 2D and 3D part data, material grade, thickness, expected volume, process requirements, destination press specifications, transfer or robot information, inspection standard and sample requirements.
Send your part data, material specification, process requirements and press-line information for a project-specific line die and tandem tooling review.
Email Drawings for Line Die ReviewDongguan Changdong Stamping Dies CO., LTD. © copyright Add：NO. 56-B, Fuming South Road, Dalang, Dongguan, P.R.C
E-mail: sales@chang-dong.com Tel: 0086-769-8106 1256 Mobile: 0086-189 2949 4380 Sales Manager: Ms. Alice Fax: 0086-769-8106 1926
Dongguan Changdong Tool & Die Co., Ltd. is a custom metal stamping die and stamped parts manufacturer founded in 2012. We support automotive, home appliance, electrical and industrial projects from DFM review and die design to press tryout, sample validation and metal stamping production.
Main capabilities: Stamping Dies | Progressive Die | Transfer Die | Prototype Die | Prototype Tooling | Stamping Parts | Custom Metal Stamping Parts
For new tooling or stamping projects, please send your 2D drawing, 3D model, material grade, sheet thickness, tolerance requirements, annual volume and sample target date through Contact Us.
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