In-depth Analysis: What Characteristics Should A Reliable Mechanical Parts Foundry Have?

In-depth analysis: What characteristics should a reliable mechanical parts foundry have?

You spend a lot of money to develop a mold, but it is directly scrapped because the accuracy of the foundry is less than 0.01 mm. I have seen a lot of this pain. Having been engaged in precision mechanical parts processing for more than ten years, those customers who encountered difficulties all ignored the three most core screening criteria without exception.

Accuracy reaching standards depends on equipment and more on testing

Many customers enter the factory and only pay attention to the number of CNC machine tools, but they never ask what kind of testing equipment is equipped. A truly reliable precision parts foundry must be equipped with a three-dimensional coordinate measuring machine and a projector, and the detection accuracy needs to reach the 0.001 mm level. Our company Shilihe is able to stably control the processing accuracy to 0.002 mm, relying on advanced processing equipment and a strict system of testing each piece. There was once a Japanese company that required the tolerance of all parts to be within 0.005 mm. We directly took out the full-size inspection report, and the other party immediately signed a contract on the spot.

For those factories that lack the ability to inspect, accuracy is really just empty talk without practical meaning. Even if the equipment is the best, if there is no three-dimensional inspection operation on a regular basis, the effect will be wasted. In the case of mass production, the dimensions will still deviate from the track. The personnel responsible for quality inspection we have deployed will use three-dimensional coordinates to review the key dimensions every two hours. Once problems are detected, the production equipment will be immediately stopped and adjustments will be made. This ensures that every part delivered to customers meets standard requirements.

Stable delivery time comes from doing it right the first time

The root cause of delayed delivery is not insufficient production capacity, but poor quality control, which leads to repeated rework. In order to compete for orders, many factories take on tasks first, only to discover that the dimensions are out of the tolerance range when they are put into production, so that they have to re-make them. This delays the time for half a month. We actively implement the 5S on-site management model and integrate the quality inspection link into every process. Through strict control at three levels: self-inspection by the operator, re-inspection by the team leader, and final inspection by the quality inspector, we ensure that things are done correctly the first time and avoid rework. In this way, the delivery date is naturally guaranteed.

Once, a customer delivered an urgent order to us, and the original construction period of 20 days was compressed to 10 days. With our stable process parameters and strict process control, we not only completed the delivery two days in advance, but also all dimensions on the test report were within the tolerance range. Later, the customer transferred all the orders and said, "You saved me from having to keep an eye on the progress in the middle of the night."

Service response cannot kick the ball

We are most afraid of being pushed around when we encounter technical problems. Our business consultation phone is answered 24 hours a day, and our technical team is always on call. Last year, a Singaporean customer discovered that the drawings were marked incorrectly in the middle of the night. If they were not confirmed in time, the materials would be opened and processed the next day. Once the mistake was made, it would cause hundreds of thousands of losses. Our engineers confirmed through video overnight, rechecked the datum and tolerances, and provided adjustment plans, successfully avoiding batch scrapping.

Response speed is not only reflected in emergency response, but increasingly reflected in the early communication process. When the customer sends the drawing, we will provide a process evaluation and quotation within two hours, while pointing out possible processing difficulties and making optimization suggestions. We are not blindly accepting the order and then looking for excuses to increase the price.

One-stop solution for materials and post-processing

Precision machining is not just as simple as cutting and forming, it is also related to heat treatments such as vacuum quenching and salt bath nitriding, as well as surface treatments such as anodizing and titanium plating. If the foundry lacks these supporting capabilities, then you have to find outsourcers on your own. Only in this way will the cost not only increase, but the cycle will also be lengthened. We can skillfully handle a variety of materials such as SKD11 mold steel, stainless steel, aluminum alloy, and tungsten steel. Heat treatment and surface treatment are all completed in the factory, so the quality can be controlled and the delivery time can be guaranteed.

Once upon a time, a customer made a request that the hardness of the parts should be above HRC58 and the surface should be plated with titanium. We directly carry out the operation, starting from material selection, then to heat treatment, and finally to titanium plating. It is completed in one stop, avoiding the trouble caused by customers sending samples back and forth. The entire stage is shortened by one-third compared with the outsourcing plan.

Industry experience helps you avoid pitfalls in advance

Parts standards are different in different fields, such as automobiles, aviation, medical, etc., and experienced factories can identify risks in advance. For example, medical parts have specific requirements for surface finish and cleanliness, and optical instrument parts are sensitive to thermal stability. These must be considered during the process design stage. We have provided services to many foreign-funded enterprises and have accumulated a large number of cases in the fields of non-standard automation, robotics, and optical instruments, which can help customers reduce detours.

There is a customer who used to make robot joints. The original drawings he designed were extremely difficult to process and the cost remained high. We gave suggestions based on experience and modified the chamfering and tolerance distribution. As a result, not only the processing became easier to operate, but the assembly accuracy was actually higher, and the cost per set was reduced by 15%. The customer said, "You are not a foundry, but a technical consultant."

After reading this article, which link should you check first when evaluating a foundry? You are welcome to share your own experience of falling into a trap in the comment area. Like this article and add it to your favorites. You can use this to check and verify next time you select a foundry.