Address : Peihouwei Village, Shatian Town,
Dongguan City, Guangdong Province, China
Call Us : + (86) 769 - 81690928-8015
Mail Us : sales1@cnstamping.com
Office Time : Monday to Friday
08:00 - 17:30

Saturday 08:00 - 12:00

FAQ

General FAQ

What are Heju stamping specialties?

We offer metal progressive die design and stamping production services, mainly provide precision connector terminals, shells and spring contacts that served the automotive, PC, mobile, medical and other electric appliance industry.

Does Heju stamping have a catalog or price list?

No. We normally provide metal stamping services for custom design terminals, shells, spring contacts and other components. We will gladly quote on any OEM custom metal stamping requirements, especially those for companies interested in obtaining a competitive, aesthetic, and strategic advantage in the marketplace.

What does Heju stamping need to quote on new products?

Send drawings, specifications, and parts lists via e-mail to sales1@cnstamping.com or send samples to Heju stamping precision electronics, Peihouwei Village, Shatian Town, Dongguan City,Guangdong, China.

What kind of drawing format you accept for quote?

Our engineer are work with software like CAD, Solidworks and Pro-E, we can accept the drawing format as PDF, DWG, .STP, .STEP, .IGS etc.

How long are your quotes valid?

In most cases, Heju stamping’ quotes are good for 1 month. If longer time frames are needed, these can usually be accommodated.

Technology FAQ

How to handle with the stamping burr for stamping die?

The reason why burrs came out as blow:
1. Die insert Abrasion;

2. The gap is too big, there is no evident effect by grinding and repair the die;

3. Die insert corner-Chipping;

4. The gap between punch and die unreasonable, it can be shift up and down or losening;

5. Tooling dislocated.

The relative countermeasures as blow:
1. Grinding and repair the die;

2. Control the fabrication precision or change the designing gap;

3. Grinding and repair the die;

4. Adjust stamping gap,confirm the die plate’s cavity hole wearing situation or check on the forming insert’s fabrication precision;

5. Change guiding elements or re-assemble the die.

How to handle with the jumping scrap crushing for stamping die?

The reason why crushing came out as blow:
1. Gap is too big;
2. Unsuitable feeding;
3. Too much stamping oil,scraps pasted on the part;
4. Tooling without demagnetization;
5. Punch weared, scraps pressed on the punch;
6. Punch is too short, length isn’t enough when inserted to the die;
7. Raw material is too hard, part with easy sharp;
8. Emergency measurement;

The relative countermeasures as blow:
1. Control the fabrication precision or change the designing gap.
2. Cut the material strip when feeding to the right position, and clean the tooling meanwhile.
3. Control the stamping oil adding speed, or change oil to reduce it’s voscosity.
4. After grinding, part must do demagnetization process. (especially for stamping steel material)
5. Grinding core plate die.
6. Adjust the length when punch blade into the die.
7. Change raw material,revise the design, punch blade side pack out or sharped with a slope or arc (pay attention to the direction), reduce  the joint area between punch blade area and the scraps.
8. Reduce die blade’s sharpness and grinding size, add surface roughness of the punch blade. use cleaner to collect the waste material, bring down the stamping speed,in order to avoide jumping scraps.

How to handle with scrap jam for stamping die?

The reason why scrap Jam came out as blow:
1. Drain hole is small;
2. Drain hole is a little big,scraps turning over;
3. Die weared, burr is too big;
4. Stamping oil added speeding, got problem for oil-sticking;
5. Die blading surface is too rough, power scraps sintering attached to the blade;
6. Raw material is too soft;
7. Emergency measurement;

The relative countermeasures as blow:
1. Change the drain hole.
2. Change the drain hole.
3. Repairing the die.
4. Control oil quantity or change oil.
5. Surface treatment, poishing,during fabrication reduce surefece roughness; Change material.
6. Modify blanking clearance.
7. Punch blade side modified with slope or arc (pay attention to the direction), use cleaning, blowing at the blanking hole on base plate.