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Why do I need to make and charge for jigs to modify an existing finished product?

模型製作, 模型生產, 治具製作廠商, 模具製作廠商, 測試治具製作, 產品模型製作, 模型製作公司, 塑膠模型製作, 模型 翻模, 公仔模型製作, 公仔生產, 客 製 化模型 公仔, 樹脂公仔製作, 矽膠模具製作, pvc模型製作, 金屬模具製作, 模具製作廠商, 簡易模具製作, 塑膠模具製作流程, 矽膠模具製作, 模具開發流程, 模具設計, 塑膠模具製作流程, 模具加工流程, 汐紫模型, 3d列印代工推薦, 3d列印矽膠模具, 橡膠3d列印, 3d列印翻模, 矽膠 翻模 代 工, 3D 列印 代工 學生, 光固化代印價格, 3d列印模型, 3d列印模型製作, 3d列印公仔, 3d列印圖檔製作, 3d列印廠商, 大型3d列印代工

Why do I need to make and charge for jigs to modify an existing finished product?

Introduction

“I just want to drill an extra hole in an existing plastic casing. Why do I have to pay for a jig in addition to the machining fee?” This is a common question customers ask when performing secondary processing or design changes on a product. On the surface, modifying an existing part seems simple, but ensuring every modification is accurate and precise requires a crucial, customized auxiliary tool—the jig.

Core Question: How does a CNC machine “see” your part?

First, we must understand that a CNC machine, unlike the human eye, cannot “see” a part and automatically align itself. It cuts within a precise XYZ three-dimensional coordinate system, following a pre-programmed path by the engineer.

To ensure that a machined feature (such as a hole) appears precisely where you want it, we must ensure that the position, angle, and orientation of the finished part when placed on the machine table are absolutely fixed and repeatable. Even the slightest movement or angular deviation can lead to significant errors in the final machining result.

The Role of the Jig: A “Personal Positioning Seat” for Precision Machining

A jig is designed to solve this problem. Think of it as a high-precision, high-rigidity “personal positioning seat” custom-made for your existing finished product. It performs three main tasks:

1. Secure Clamping: CNC cutting generates enormous forces, and the jig must securely hold your finished product in place, preventing any vibration or movement during machining and ensuring machining stability.

2. Precise Positioning and Repeatability: This is crucial. The jig is precisely tailored to the shape of your finished product, ensuring that each piece is positioned in the exact same coordinates. This ensures that the holes drilled in the first and hundredth pieces are in exactly the same position.

3. Protect Your Finished Product: Standard vises can damage or deform the surface of irregular or fragile parts. Customized fixtures can perfectly conform to the curved surfaces of finished products, providing a secure clamping force without damaging the product’s appearance.

Why do fixtures incur an additional charge?

Simply put, the fixture itself is a high-precision, custom part that requires individual design and manufacturing.

  • It’s a customized product: Each fixture is unique and cannot be a one-size-fits-all solution.
  • It requires engineering design: Our engineers spend time designing the most stable and efficient clamping solution based on your finished product’s 3D drawings.
  • It also requires precision manufacturing: We also use CNC machines, expending material and labor to create this fixture.

Conclusion: It’s a “quality guarantee,” not an “extra charge.”

In short, the cost of a fixture isn’t an “extra charge,” but rather a necessary infrastructure investment to ensure machining accuracy, quality consistency, and high product yield when performing precision secondary machining.

It embodies the fundamental difference between professional manufacturing and non-professional machining. Our goal is not just to “complete the modification,” but to “complete the modification perfectly.” The production of specialized jigs is a concrete manifestation of our commitment to quality.