Header Punches & Punch Pins
First Upset Punch Case for Multi-Station Screw Moulds
First upset punch case for screw multi-station cold heading. Jungu checks first-station load, punch support, holder fit, blank volume, and breakage pattern before quoting.
What is First Upset Punch Case for Multi-Station Screw Moulds used for?
A first upset punch case supports the punch used in the early upsetting station of a multi-station screw mould. This station sets the material volume and head preform for later operations, so small support or alignment errors can become larger defects downstream. If the punch case allows tilt, the punch nose can break or the preform becomes off-center. If the blank volume is unstable, the punch case sees shock load that looks like a material problem but is actually a process issue. Jungu reviews the station layout, screw drawing, blank diameter and cut length, punch size, holder fit, support length, case bore, material and hardness route, and photos of broken punches, worn bores, off-center preforms, or short tool life before quoting.
Common sourcing use
First-stage screw upsetting where punch support, holder fit, blank volume, and station alignment determine downstream forming stability.
Related product families
Technical Review Scope
What Jungu checks
- Station layout, first upset position, punch size, support length, case bore, and holder fit
- Screw drawing, blank diameter, cut length, material grade, hardness, and lubrication
- Case material, heat treatment, clearance target, guide length, and assembly method
- Failure mode: punch breakage, bore wear, off-center preform, head fold, fretting, or short case life
Why no standard price is shown
This is B2B custom tooling. A reliable quotation depends on drawing, material, size, tolerance, machine setup, annual quantity, and the mould-life issue the buyer wants to solve. Jungu quotes after technical review instead of showing a misleading fixed price.
Information Needed for Quotation
| Station data | Machine model, first upset station, punch case drawing, holder size, and assembly photos. |
|---|---|
| Blank route | Screw drawing, blank diameter, cut length, material, hardness, and lubrication. |
| Support fit | Case bore, punch diameter, clearance, guide length, heat treatment, and support shoulder. |
| Failure evidence | Photos of broken punch, worn bore, off-center preform, fold marks, or fretting. |
Application and Buyer Fit
| Typical application | first-stage screw upsetting where punch support, holder fit, blank volume, and station alignment determine downstream forming stability |
|---|---|
| Buyer review focus | first station load, punch case bore, holder fit, support length, blank volume, material hardness, and broken-punch evidence |
| Quotation basis | drawing, material, tolerance, machine model, quantity, and target tool life |
| Review output | a punch case route matched to early-stage upset load, punch support, holder interface, and screw preform accuracy |
Inquiry Process
- Send drawings and application details.
- Jungu reviews manufacturability and tooling route.
- Engineering confirms material, tolerance, and mould-life target.
- Quotation and lead time are prepared after technical confirmation.
FAQ
Why does the first upset punch break early?
Common causes are punch tilt, insufficient support length, blank volume drift, holder looseness, or off-center station load.
Can Jungu copy the old case?
A sample helps, but station layout and punch data are needed because the old clearance may already be wrong.
Why does first-station error matter?
It changes material distribution for later stations, so downstream defects may start from this support problem.
Can this product be customized?
Yes. Jungu manufactures fastener mould tooling according to buyer drawings, samples, and machine requirements.
Need this tooling reviewed?
Send drawings, machine model, material, and current failure photos for review.