Wuxi Zhenhua Auto Parts Co., Ltd.

Stamping is the company's core business: presses and dies apply force to sheet, strip, tube and profile stock so that it deforms plastically or separates into parts of the required shape and size. The range covers body, chassis, powertrain and electrical/electronic parts, some developed specifically for new-energy vehicles, and is supplied to vehicle makers from single stampings up to welded assemblies.

Scope: stamping parts business; product groups: body, chassis, powertrain, electrical/electronic; process: cold stamping (blanking, drawing, trimming, piercing, flanging, restriking) plus welding into assemblies; materials: high-strength steel, galvanized sheet, aluminium alloy; powertrain and electrical/electronic groups include items dedicated to new-energy vehicles.

• Automotive body-in-white structure
• Automotive chassis system
• Automotive powertrain
• Automotive electrical and electronic systems
• New-energy vehicle components

Body parts are the main series of the stamping business and cover roof, sidewall, wheel-house, floor, longitudinal member and door hinge structures and reinforcements. Most are press formed from high-strength steel sheet and welded into assemblies; together with A/B-pillar and rocker reinforcements, door beams and longitudinal members they build the safety cell that protects occupants in a crash and define body stiffness, load capacity and passive safety.

Business: stamping parts; category: body-in-white structural and reinforcement assemblies; process: press forming plus spot or projection welding; typical items: roof rail reinforcement assembly, roof crossmember assembly, A/B-pillar reinforcement assemblies, front and rear wheel-house assemblies, body hinge, rear floor rear section, front and rear longitudinal member assemblies; material: high-strength steel sheet.

• Body-in-white frame
• Body structure reinforcement
• Crash safety protection
• Roof and sidewall structure

The chassis series consists of stamped fuel tank straps, heat shields and reinforcement plates for suspension joints. Tank straps hold the fuel tank firmly against the body, heat shields isolate the high temperature of the exhaust system so that nearby parts do not age or even catch fire, and reinforcement plates give the suspension system sufficient strength; the three groups together safeguard driving safety and stability.

Business: stamping parts; main products: fuel tank strap, heat shield, reinforcement plate; functions: fuel tank fastening, exhaust heat isolation, suspension reinforcement; process: press forming; material: steel sheet.

• Automotive fuel system
• Exhaust system heat protection
• Automotive chassis and suspension system

The powertrain series contains oil pans and converter housings. The oil pan stores engine oil so that the moving parts of the engine and transmission stay lubricated and run smoothly, while the converter housing, intended for new-energy vehicles, encloses the AC/DC conversion control unit and shields it from outside contact. The series therefore serves both conventional and new-energy vehicles.

Business: stamping parts; main products: oil pan, converter housing (for new-energy vehicles); functions: oil storage and lubrication, housing protection for the AC/DC conversion control unit; process: press forming; vehicle types: conventional combustion-engine cars and new-energy vehicles.

• Automotive engine and transmission
• New-energy vehicle electronic control unit
• Automotive powertrain system

The electrical/electronic series covers stamped starter battery trays, traction battery trays, knock sensor harness brackets and electromagnetic shielding covers; the traction battery tray and the shielding cover are intended for new-energy vehicles. The battery tray supports the whole battery pack and shields it from mud, water and stones thrown up by the wheels, the shielding cover blocks external electromagnetic interference on the AC/DC converter controller, and the harness bracket fixes the vehicle wiring harness to the body.

Business: stamping parts; main products: starter battery tray, traction battery tray (for new-energy vehicles), knock sensor harness bracket, electromagnetic shielding cover (for new-energy vehicles); functions: fixing and supporting the 12 V battery and the traction battery pack, harness fastening, electromagnetic shielding; process: press forming.

• New-energy vehicle traction battery pack
• Automotive battery installation
• Automotive electronic harness fastening
• Electromagnetic protection of control units

The sub-assembly business originates from the body welding shop of vehicle manufacturers: the company welds and assembles body-in-white sub-assemblies for its customers. Most products are welded from high-strength steel stampings and, together with the A/B-pillar and rocker reinforcements and the longitudinal members, form the safety cell that protects occupants in a crash. The business mainly serves the SAIC passenger-car Zhengzhou and Ningde plants and covers more than 500 sub-assembly part numbers.

Scope: sub-assembly processing business; process: spot welding, projection welding and CO2 shielded welding of stampings into assemblies; more than 500 sub-assembly part numbers involved; main customers: SAIC passenger-car Zhengzhou plant and Ningde plant; material: high-strength steel; representative assemblies: central tunnel assembly, AB-pillar frame reinforcement assembly, rear side panel inner assembly, seat panel assembly, rear panel assembly, tail lamp mounting frame assembly.

• Body-in-white sub-assembly welding
• Support for OEM body shops
• Body safety cell structure

The company provides selective precision electroplating for selected parts of high-pressure injectors and high-pressure fuel pumps, applying precision chromium plating to the critical areas designated by the customer. The process raises hardness, wear resistance and corrosion resistance so that the parts keep working correctly under long-term high-pressure, high-frequency operation. The parts plated are mainly precision items such as armatures, inner support rods and cores.

Scope: selective precision electroplating business; process: selective precision plating (localized hard chromium); plated items: armature, inner support rod and core of high-pressure injectors (HDEV) and high-pressure fuel pumps; property gains: hardness, wear resistance, corrosion resistance; service conditions: long-term high-pressure, high-frequency motion.

• Automotive high-pressure injectors
• High-pressure fuel pumps
• Turbocharged injectors

The company designs and builds automotive stamping dies, undertaking large outer-panel and structural stamping die projects for vehicle makers and tier-one suppliers. The website shows dies for projects such as JEEP5231, MSP2, Mercedes-Benz BBAC V213&W213 and the rear parcel shelf, quoting part name, material, sheet thickness, part size and the OP sequence. Die operations cover blanking, drawing, trimming, piercing, flanging, restriking, burring and cam piercing.

Scope: die business; representative project materials: TWC450Y950T, CR440Y780T-DP GI50/50-U, Grade 5052-H32-R-ST-1, Grade 5754-O-S-ST-1 aluminium alloy; sheet thickness range: 0.95 mm to 2.5 mm; part size range: 935*155 mm to 1428*252 mm; typical operations: OP05 PROG, OP10 DR, OP20 TR+PI+CTR, OP30 TR+CPI+CTR, OP40 FL+RST, OP50 FL+CPI.

• Stamping dies for automotive outer panels
• Stamping dies for automotive structural parts
• Die development for vehicle manufacturers

The roof rail reinforcement assembly belongs to the body parts series and acts as the main roof rail. It prevents the roof from deforming when the vehicle rolls over, protecting the occupants, and also serves to fix the headliner and to mount the grab handles and side airbags. The part is welded from stampings into an assembly and is a key reinforcement of the upper body-in-white structure.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: high-strength steel sheet; functions: roof rail, headliner fixing, mounting point for grab handles and side airbags.

• Body-in-white roof structure
• Rollover safety protection
• Mounting of interior trim and safety components

The roof crossmember assembly belongs to the body parts series and links the two side rails, supports the exterior roof panel and fixes the interior headliner, and it also provides the mounting point for the cabin dome light. The assembly secures the stiffness of the roof area and the reference base for the headliner and lamps.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: steel sheet; functions: linking the two side rails, supporting the exterior roof, fixing the headliner, mounting the cabin dome light.

• Body-in-white roof structure
• Roof interior trim mounting
• Cabin lighting mounting

The A-pillar reinforcement assembly sits on both sides of the front of the cabin and is a main structural member of the passenger compartment. It connects the upper and lower structure and meets load-bearing safety requirements, and both the instrument panel assembly and the fuse box use it as a locating datum. It is a key front-end crash-safety structure of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: high-strength steel sheet; functions: cabin load bearing and connection, locating datum for the instrument panel assembly and the fuse box.

• Body-in-white cabin structure
• Frontal crash safety
• Locating base for instrument panel and fuse box

The B-pillar reinforcement assembly is one of the main parts of the body side panel and supports the cabin and the anchorage of the seat belt. It protects the occupants in a side impact and is a core structural member for side crash safety of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: high-strength steel sheet; functions: side panel support, seat belt anchorage, side impact safety.

• Body-in-white side panel structure
• Side impact safety
• Seat belt anchorage

The front wheel house assembly forms the partition between the wheel and the cabin and carries parts such as the wheel mudguard and the sound insulation felt. It blocks the mud, water and noise generated by the wheels while driving and is a front wheel-house structural part of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: steel sheet; functions: wheel-to-cabin partition, mounting of mudguard and sound insulation felt.

• Front wheel-house area of the body-in-white
• Wheel protection, sound and noise insulation

The rear wheel house assembly separates the wheel from the cabin and carries the mudguard and sound insulation felt, blocking the mud and noise produced by the wheels while driving. It is a rear wheel-house structural part of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: steel sheet; functions: wheel-to-cabin partition, mounting of mudguard and sound insulation felt.

• Rear wheel-house area of the body-in-white
• Wheel protection, sound and noise insulation

Body hinges are key parts connecting the vehicle doors: they hold the door and allow it to open as required. They ensure that the doors open normally throughout the life of the vehicle and prevent any displacement between the door and the body.

Series: body parts (stamping business); process: press forming (forming, piercing and similar operations); material: steel sheet; functions: door connection and fixing, door opening and travel limitation.

• Automotive door assembly
• Body-in-white closure connection

The rear floor rear section is the main supporting part of the luggage compartment, used to fit the boot sound insulation and to house the spare wheel and tools. It is a rear floor structural part of the body-in-white and provides load-bearing support for the luggage area.

Series: body parts (stamping business); process: press forming; material: steel sheet; functions: luggage compartment load bearing, mounting of insulation felt and spare wheel tools.

• Body-in-white rear floor structure
• Luggage compartment load bearing and spare wheel stowage

The front longitudinal member assembly sits at the very bottom of the body and supports the whole body system. In a crash it dissipates impact energy and prevents body deformation, protecting the occupants. It is a key load-bearing and energy-absorbing structure at the front of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: high-strength steel sheet; functions: underbody support, impact energy dissipation, crash energy absorption.

• Body-in-white underbody structure
• Frontal crash energy absorption and load bearing

The rear longitudinal member assembly is located at the very bottom of the body and supports the whole body system. In an impact it dissipates impact energy and prevents body deformation to protect the occupants. It is a key structural part for rear load bearing and rear-end crash safety of the body-in-white.

Series: body parts (stamping business); process: press forming plus welding into an assembly; material: high-strength steel sheet; functions: underbody support, impact energy dissipation, crash energy absorption.

• Body-in-white underbody structure
• Rear-end crash energy absorption and load bearing

The fuel tank strap belongs to the chassis parts series and holds the fuel tank firmly against the body. It secures the tank under the driving and vibration conditions of the whole vehicle.

Series: chassis parts (stamping business); process: press forming; material: steel sheet; function: mounting and fastening of the fuel tank.

• Fuel tank fastening
• Automotive chassis assembly

The heat shield belongs to the chassis parts series. While driving, the exhaust system discharges hot gases whose high temperature would conduct to other parts; this component isolates that heat between the exhaust pipe and the surrounding parts so that they do not age or even catch fire.

Series: chassis parts (stamping business); process: press forming; material: thin metal sheet; function: high-temperature isolation and thermal protection for the exhaust system.

• Exhaust system heat protection
• Automotive chassis heat insulation

The reinforcement plate belongs to the chassis parts series and reinforces the lower suspension joints of the underbody. It gives the whole suspension system sufficient strength while the car is driving, ensuring safety and stability on the road.

Series: chassis parts (stamping business); process: press forming; material: high-strength steel sheet; function: reinforcement of the chassis suspension joints.

• Automotive chassis and suspension system
• Body-to-chassis joint reinforcement

The oil pan belongs to the powertrain parts series. The moving parts of the engine and transmission need oil lubrication to run smoothly, and this part stores the oil so that the engine and gearbox keep operating correctly.

Series: powertrain parts (stamping business); process: press forming; material: steel sheet; function: oil storage and lubricant supply.

• Automotive engine
• Automotive transmission
• Automotive powertrain system

The converter housing is intended for new-energy vehicles and belongs to the powertrain parts series. It is the outer shell of the AC/DC conversion control unit of an electric vehicle and shields the control unit from external contact, providing protection.

Series: powertrain parts (stamping business); vehicle type: new-energy vehicles; process: press forming; function: housing and external protection of the AC/DC conversion control unit.

• New-energy vehicle electronic control unit
• New-energy vehicle powertrain

The starter battery tray belongs to the electrical and electronic series and is usually located in the engine compartment or the luggage compartment. It holds and supports the vehicle battery, keeping it stable while the car is driving.

Series: electrical/electronic parts (stamping business); process: press forming; material: steel sheet; function: fixing and supporting the vehicle battery.

• Automotive battery installation
• Engine compartment and luggage compartment assembly

The traction battery tray is intended for new-energy vehicles and belongs to the electrical and electronic series. The battery of a new-energy vehicle is located under the body; this part supports the whole battery pack and shields it from outside contact, preventing mud, water and stones thrown up by the wheels from hitting the pack.

Series: electrical/electronic parts (stamping business); vehicle type: new-energy vehicles; process: press forming; function: support and underbody protection of the traction battery pack.

• New-energy vehicle traction battery pack
• New-energy vehicle underbody protection

The knock sensor harness bracket belongs to the electrical and electronic series. The vehicle wiring harness runs from the front to the rear of the car, and this part fastens the harness to the vehicle so that it stays in a stable position.

Series: electrical/electronic parts (stamping business); process: press forming; material: steel sheet; function: fastening the automotive electronic harness.

• Automotive electronic harness fastening
• Automotive sensor applications

The electromagnetic shielding cover is intended for new-energy vehicles and belongs to the electrical and electronic series. The control unit of the AC/DC converter requires high precision, and this part shields it from external electromagnetic interference so that it works stably.

Series: electrical/electronic parts (stamping business); vehicle type: new-energy vehicles; process: press forming; function: shielding the electronic control unit from electromagnetic interference.

• New-energy vehicle AC/DC converter controller
• Electromagnetic protection of automotive control units

The central tunnel assembly belongs to the sub-assembly welding business. The part sits in the middle of the body floor and carries the gearshift mechanism, the handbrake mechanism and the armrest box; it is the main component of the front floor, and its lower cavity forms the passage for the exhaust pipe. Made of high-strength steel, it works together with the A/B-pillar reinforcements, rocker reinforcements, door beams and longitudinal members to form a safety cell.

Business: sub-assembly processing; position: middle of the body floor; material: high-strength steel; process: welding and assembly of stampings into an assembly; functions: mounting of gearshift, handbrake and armrest box, exhaust pipe passage.

• Body-in-white front floor
• Gearshift and handbrake mounting
• Body safety cell structure

The AB-pillar frame reinforcement assembly belongs to the sub-assembly welding business. The part is located on both sides of the front cabin and carries the engine hood, the front fenders and the doors. It keeps the cabin from deforming on impact and protects the occupants in the front seats.

Business: sub-assembly processing; position: both sides of the front cabin; process: welding and assembly of stampings into an assembly; material: high-strength steel; functions: mounting of hood, front fenders and doors, front cabin crash protection.

• Body-in-white front cabin structure
• Frontal crash protection
• Closure panel mounting

The rear side panel inner assembly belongs to the sub-assembly welding business. The part is mainly used to mount the rear door latch, the rear wheel inner liner, the rear interior trim and the rear seat belts. Together with the roof rail and the rear panel it forms the cabin of the rear passengers.

Business: sub-assembly processing; position: rear side of the body; process: welding and assembly of stampings into an assembly; material: high-strength steel; functions: mounting of rear door latch, rear wheel liner, rear interior trim and rear seat belts.

• Body-in-white rear side structure
• Rear passenger cabin formation
• Rear seat belt mounting

The seat panel assembly belongs to the sub-assembly welding business. The part is located under the rear passenger seat and mainly serves to mount and secure the rear seat and the rear seat belts, while also separating the passenger area from the rear luggage compartment.

Business: sub-assembly processing; position: under the rear seat; process: welding and assembly of stampings into an assembly; material: high-strength steel; functions: mounting and fixing of the rear seat and seat belts, separation from the luggage compartment.

• Body-in-white rear floor structure
• Rear seat mounting
• Rear seat belt fixing

The rear panel assembly belongs to the sub-assembly welding business and is the stamped assembly located at the very rear of the body. It is mainly used for mounting the rear bumper trim and the luggage compartment lid.

Business: sub-assembly processing; position: rearmost part of the body; process: welding and assembly of stampings into an assembly; material: steel sheet; functions: mounting of rear bumper trim and luggage compartment lid.

• Body-in-white rear-end structure
• Rear bumper and luggage lid mounting

The tail lamp mounting frame assembly belongs to the sub-assembly welding business. The part is located on the side of the rear luggage compartment and is mainly used for mounting the luggage lid struts and the rear lamps, while also providing drainage for the rear body.

Business: sub-assembly processing; position: side of the rear luggage compartment; process: welding and assembly of stampings into an assembly; material: steel sheet; functions: mounting of luggage lid struts and rear lamps, rear body drainage.

• Body-in-white rear structure
• Automotive tail lamp mounting
• Luggage lid strut mounting

Single and double-sided armatures are representative products of the selective precision electroplating business and are precision parts of the high-pressure injector (HDEV) of an engine. The company applies precision chromium plating to the designated critical areas to raise hardness, wear resistance and corrosion resistance. When the injector is energised, the solenoid coil generates a magnetic force that lifts the needle valve assembly and fuel is injected; the armature is the key moving part in that action.

Business: selective precision electroplating; part position: engine high-pressure injector (turbocharged injector); part types: single-sided armature, double-sided armature; process: selective precision plating (localized hard chromium); property gains: hardness, wear resistance, corrosion resistance.

• Automotive high-pressure injectors
• Turbocharged direct-injection engines
• High-pressure fuel pumps

The inner support rod is a representative product of the selective precision electroplating business and a precision supporting part inside the high-pressure injector (HDEV). The company applies precision chromium plating to the designated critical areas so that the part keeps working correctly under long-term high-pressure, high-frequency operation.

Business: selective precision electroplating; part position: inside the engine high-pressure injector (turbocharged injector); process: selective precision plating (localized hard chromium); property gains: hardness, wear resistance, corrosion resistance.

• Automotive high-pressure injectors
• Turbocharged direct-injection engines
• High-pressure fuel pumps

JEEP5231 is a stamping die project shown under the die business; the corresponding part is the front crash beam box (BEAM FRTCRASH BOX). The die is laid out with blanking, drawing, trimming and piercing, flanging and restriking, burring and cam piercing operations for series production of front crash beam structural parts.

Project name: JEEP5231; part name: BEAM FRTCRASH BOX; material: TWC450Y950T; sheet thickness: 1.6 mm; part size: 1000*180; operations: OP10 DR, OP20 TR+PI+CTR, OP30 TR+PI+CTR, OP40 FL+RST+BUR, OP50 CTR+PI+CPI.

• Front crash beam stamping
• Die development for automotive structural parts

MSP2 is a stamping die project shown under the die business; the corresponding part is a crossmember stamping (ANKLE CATCHER CROSSMEMBER STAMPING, MSP2) made of 5052 aluminium alloy. The die sequence includes blanking, piercing, drawing, trimming and restriking and is used for series forming of aluminium crossmember parts.

Project name: MSP2; part name: ANKLE CATCHER CROSSMEMBER STAMPING, MSP2; material: Grade 5052-H32-R-ST-1 pre TM3-2003 (aluminium alloy); sheet thickness: 2.5 mm; part size: 935*155; operations: OP10 BL, OP15 ID, OP20 DR, OP30+40 TR+PI/TR, OP50 RST.

• Stamping of automotive crossmember parts
• Die development for aluminium outer panels

Mercedes-Benz BBAC V213&W213 is a stamping die project shown under the die business; the corresponding part is the left-hand roof frame inner panel (ZB ROOF FRAME INR SIDE LH) of a Mercedes-Benz model. The die sequence includes blanking, drawing, trimming and piercing, flanging and restriking and burring, and is used for series stamping of high-strength steel roof frame parts.

Project name: Mercedes-Benz BBAC V213&W213; part name: ZB ROOF FRAME INR SIDE LH; material: CR440Y780T-DP GI50/50-U; sheet thickness: 1.5 mm; part size: 1428*252; operations: OP05 PROG, OP10 DR, OP20 TR+PI+CTR, OP30 TR+CPI+CTR, OP40 FL+RST, OP50 FL+CPI.

• Stamping of passenger-car roof frame inner panels
• Die development for OEM outer panels

The rear parcel shelf is a stamping die project shown under the die business; the part is an automotive rear parcel shelf panel in 5754 aluminium alloy and belongs to the family of lightweight aluminium stampings. The die sequence includes blanking, drawing, trimming and piercing, flanging and restriking and burring, and the part measures 1060*890 mm.

Part name: rear parcel shelf; material: Grade 5754-O-S-ST-1_per_TM-2009_Aluminum (aluminium alloy); sheet thickness: 0.95 mm; part size: 1060*890; operations: OP05 PROG, OP10 DR, OP20 TR+PI+CTR, OP30 TR+CPI+CTR, OP40 FL+RST, OP50 FL+CPI.

• Stamping of automotive rear parcel shelf panels
• Die development for lightweight aluminium parts

The CTR+PI+CPI lower die is a die component shown under the die business: the lower half that performs the combined trimming (CTR), piercing (PI) and cam piercing (CPI) operations. It belongs to the blanking and piercing station of a large automotive stamping die and, with the matching upper die, completes the contour trimming and hole forming of the part.

Business: die business; die position: lower die; operation combination: CTR (trimming) + PI (piercing) + CPI (cam piercing); application: combined trimming and piercing stage of automotive stampings.

• Trimming and piercing stage of automotive stampings
• Manufacture of large multi-station stamping dies

The CTR+Pl+CPI upper die is a die component shown under the die business: the upper half that performs the combined trimming (CTR), piercing (PI/Pl) and cam piercing (CPI) operations. It works with the matching lower die for contour trimming and hole forming of automotive stampings.

Business: die business; die position: upper die; operation combination: CTR (trimming) + Pl/PI (piercing) + CPI (cam piercing); application: combined trimming and piercing stage of automotive stampings.

• Trimming and piercing stage of automotive stampings
• Manufacture of large multi-station stamping dies